CN111790577B - Electric glue gun and control method thereof - Google Patents

Abstract

The invention discloses an electric glue gun, comprising: a housing; a motor supported by the housing; a bracket extending from the housing for supporting a packing element; a push-out mechanism supported by the housing and connected to a motor, the push-out mechanism comprising a push rod, the motor being capable of driving the push-out mechanism to enable the push rod to extrude the gel in the gel cartridge; a controller for controlling the motor; the controller is configured to: after the motor stops driving the push rod to advance or the push rod reaches a limiting position, the motor can be controlled to enable the push rod to retract by a preset distance. The electric glue gun is convenient for removing the glue skin and unlocking the push rod, and can prevent glue from continuously seeping out of the nozzle after stopping glue spraying, so that nozzle dirt is generated.

Description

Electric glue gun and its control method

technical field

The invention relates to an electric glue gun and a control method thereof.

Background technique

Electric glue gun is a tool that can automatically glue or squeeze glue, which is widely used in architectural decoration, electronic appliances, auto parts and other industries. Compared with the manual glue gun, the electric glue gun in the prior art has a high degree of automation and is relatively labor-saving. However, there are some defects in the existing electric glue guns. After the user releases the trigger to stop the glue work: the rubber for containing the glue may be stuck on the top of the end of the retracting rod in the glue cartridge due to being squeezed and folded. It takes force to pull out the rubber and replace it; and, after stopping the glue, the push rod may extend beyond the limit position, which is inconvenient to unlock the push rod; in addition, the glue may flow out or seep out of the glue gun after stopping the glue. Nozzles, resulting in nozzle dirt, adding additional labor costs and time to clean the colloid.

Contents of the invention

In order to solve the deficiencies of the prior art, the object of the present invention is to provide an electric glue gun and its control method that facilitate the disassembly of the rubber of the glue and the unlocking of the push rod, and can prevent the glue from continuing to leak out of the nozzle after the glue is stopped.

In order to achieve the above object, the present invention adopts the following technical solutions:

An electric glue gun, comprising: a housing; a motor supported by the housing; a bracket extending from the housing, and the bracket is used to support the glue cartridge; a push-out mechanism supported by the housing and connected to A motor, the push rod mechanism includes a push rod, the motor can drive the push rod so that the push rod can extrude the glue in the rubber cartridge; the controller is used to control the motor; the controller is configured It is: after the motor stops driving the push rod forward or after the push rod reaches a limited position, the motor can be controlled to make the push rod retreat a preset distance.

Optionally, the electric glue gun includes an inching mode and a non-inching mode.

Optionally, the electric glue gun also includes a mode detection part, the mode detection part is used to detect whether the electric glue gun is in the jog mode or the non-jog mode; the mode detection part is electrically connected to the controller .

Optionally, the mode detection part includes a timing unit, the timing unit is used to determine the normal running time of the motor; the controller is configured to judge that the electric glue gun is in jogging according to the normal running time of the motor The mode is still the non-jog mode; the controller is configured to determine that the electric glue gun is in the non-jog mode when the normal running time of the motor is greater than or equal to a preset time.

Optionally, the controller is configured to control the motor to retreat the push rod by a preset distance after judging that the electric glue gun is in the non-jog mode and the motor stops driving the push rod forward .

Optionally, the electric glue gun has multiple gears, the motor has different maximum rotational speeds in the multiple gears, and the preset distances for the push rod to retreat in the different gears are different .

Optionally, the electric glue gun includes a position detection part, the position detection part is used to detect whether the push rod reaches a limited position, and the position detection part is configured to , outputting a signal to the controller; the controller is configured to control the motor to retreat the push rod by a preset distance after the push rod reaches a defined position.

Optionally, the position detection part includes a magnetic sensor and a magnetic element, one of the magnetic sensor and the magnetic element is fixedly arranged relative to the housing, and the other of the magnetic sensor and the magnetic element is arranged on the pusher. rod; when the push rod reaches the limited position, the magnetic sensor can sense the magnetic field of the magnetic element and output a signal to the controller.

Optionally, the normal running time of the motor is: the running time of the motor at a constant speed or the running time of the motor from zero speed to before braking.

Optionally, the electric glue gun also includes a locking mechanism, the locking structure is used to prevent the push rod from moving forward when the push rod reaches a limited position; the locking mechanism can be operated Unlock to enable forward movement of the push rod.

Optionally, when the glue gun is started again, the controller can control the electric glue gun to enter the acceleration mode so that the push rod accelerates forward; when the push rod overcomes the retreat preset distance Afterwards, the controller can control the electric glue gun to switch to the working mode and rotating speed set by the user.

Optionally, the electric glue gun further includes: a memory for storing the state of the electric glue gun when it was used last time; the state at least includes the working mode before the motor stops driving the push rod forward and the The preset distance the putter moves back.

A control method for an electric glue gun, the electric glue gun includes a motor and a push rod driven by the motor, the control method includes: after the motor stops driving the push rod forward, controlling the motor to make the push rod retreat Set the distance; after the glue gun is started again, control the electric glue gun to enter the acceleration mode to overcome the preset distance of the push rod retreat; when the push rod overcomes the retreat preset distance , control the electric glue gun to switch to the working mode and speed set by the user.

Optionally, the control method further includes: judging whether the electric glue gun is in the inching mode or in the non-inching mode; after judging that the electric glue gun is in the non-inching mode, and driving the push rod forward when the motor stops Afterwards, the motor is controlled to make the push rod retreat a preset distance.

Description of drawings

Figure 1 is a perspective view of an electric glue gun with a rubber cartridge installed;

Fig. 2 is a partial plan view of the electric glue gun in Fig. 1;

Fig. 3 is a partial sectional view of the electric glue gun in Fig. 2;

Fig. 4 is a schematic circuit diagram of the electric glue gun of the first embodiment;

Fig. 5 is the circuit principle diagram of the electric glue gun of the second embodiment;

Fig. 6 is a flow chart of a control method of the electric glue gun shown in Fig. 5;

Fig. 7 is another control method flowchart of the electric glue gun shown in Fig. 5;

Fig. 8 is a circuit schematic diagram of the electric glue gun of the third embodiment;

Fig. 9 is a flow chart of a control method of an embodiment of the electric glue gun shown in Fig. 8;

Fig. 10 is a flow chart of the control method of another embodiment of the electric glue gun shown in Fig. 8;

Fig. 11 is a flow chart of the control method of the electric glue gun shown in Fig. 4;

Fig. 12 is a schematic circuit diagram of the electric glue gun of the fourth embodiment;

Fig. 13 is a control method flow chart of an embodiment of the electric glue gun shown in Fig. 12;

Fig. 14 is a flow chart of the control method of another embodiment of the electric glue gun shown in Fig. 12;

Fig. 15 is a schematic circuit diagram of the electric glue gun of the fifth embodiment;

Fig. 16 is a flow chart of a control method of an embodiment of the electric glue gun shown in Fig. 15 .

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to the electric glue gun 100 shown in FIGS. 1 to 4 , it mainly includes: a prime mover, a casing 12 , and a push-out mechanism 14 .

A first accommodating cavity 121 is formed inside the casing 12 , the prime mover is disposed in the first accommodating cavity 121 of the casing 12 , and a handle 122 for an operator to hold is also formed in the casing 12 . In this embodiment, the prime mover is the motor 11, and the motor includes a motor shaft 111 for driving the output shaft 145 to swing around the central axis.

The electric glue gun 100 also includes a speed change device 13, the speed change device 13 is arranged in the first housing cavity 121 of the housing 12, and is positioned between the motor shaft 111 and the output shaft 145 of the motor 11 for changing the rotational speed output by the motor 11 while simultaneously The rotation is transmitted to the output shaft 145 . The specific structure of the speed change device 13 is well known in the art, so details are not repeated here.

The pushing mechanism 14 includes: a second receiving chamber 141 , a push rod 142 , a transmission mechanism 143 and a locking mechanism 144 . The transmission mechanism 143 is connected with the output shaft 145 for driving the push rod 142 to slide along the first linear direction 101 to extrude the glue. The transmission mechanism 143 is formed or connected with a push rod rotating part, the output shaft 145 drives the push rod rotating part to rotate, and the push rod 142 passes through the push rod rotating part and is driven with the rotation of the push rod 142 rotating part. In order to clearly illustrate the technical solution of the present invention, the front side and the rear side shown in Fig. 2 and Fig. 3 are also defined.

The second accommodating chamber 141 is used for installing and fixing the rubber cartridge 15, and the glue cartridge 15 is filled with glue. When the push rod 142 moves forward, it generates a pressing force to extrude the glue to flow out from the glue-coated rubber, so that the glue can be extruded from the rubber barrel 15 . The casing 12 is formed with a bracket 123 extending from the casing 12 for supporting the rubber cartridge 15 .

A dripper 102 is detachably mounted on the front end of the rubber cartridge 15 , and in some specific implementations, the dripper 102 is mounted on the front end of the rubber cartridge 15 by means of threaded installation. In this embodiment, the outer surface of the rubber tube 15 is provided with a plurality of slots extending in the front and rear directions, which not only reduces the weight of the rubber tube 15, but also plays an anti-slip function to prevent slippage when the human hand is holding the rubber tube.

The locking mechanism 144 is arranged between the push rod 142 and the transmission mechanism 143. When the locking mechanism 144 is locked, the push rod 142 is movable in one of the front and rear directions, but immovable in the other direction; When the structure is unlocked, the push rod 142 can slide freely in the forward and backward direction. The setting of the locking mechanism 144 is convenient for the user to easily replace the rubber cartridge 15, increasing the continuity of work. The locking mechanism 144 is also provided with an unlocking mechanism 144a for unlocking the locking mechanism 144 so that the push rod 142 can freely slide in the front-rear direction. As an implementation manner, the unlocking mechanism 144a includes a button.

In order to make the push rod 142 exert uniform and continuous force when extruding the rubber tube 15, a plug 142a is also provided at the front end of the push rod 142, and the plug 142a can be connected with one end of the push rod 142 or formed at one end of the push rod 142 The disk can also be other shapes or structures that are convenient for extruding the colloid to flow out from the rubber. The plug 142a is used to contact the glue, and is pushed by the push rod 142 to squeeze the glue.

In this embodiment, the push rod 142 is specifically a screw rod with an external thread, and the screw rod is also formed with a flat position to prevent itself from rotating during the sliding process, that is, the external thread on the screw rod is discontinuous, and the screw rod The main body has a smooth plane along the first linear direction 101 , which blocks the continuous structure of the external thread, so that it only slides when driven by the rotating part of the push rod 142 , but does not rotate.

The electric glue gun 100 also includes an operation switch supported by the casing 12 and movable in at least one direction, and the operation switch can be operated. And at least include the operating state of stopping the motor from driving the push rod forward.

As an option, the operating switch is a trigger 16, which can be pressed and released. When it is pressed to the first position, the motor 11 can be started, and when it is released to the second position, the motor 11 can stop driving the push rod. go ahead. It should be noted that, in the present invention, the stop of the motor 11 to drive the push rod forward means that the motor 11 exits the running state of driving the push rod forward and enters the braking state to brake until the motor stops rotating, or does not perform forced braking but due to resistance. The motor speed naturally decreases until it stops rotating.

The working modes of the electric glue gun 100 include inching mode and non-inching mode, and users can switch to different working modes according to different working requirements. Wherein, when the electric glue gun 100 is in the jogging mode, the controller 41 controls the motor 11 to output a rotating speed at preset intervals, and the rotating speed of the motor may be a fixed rotating speed. The preset duration is selectively set by the user to meet work needs. For example, when installing advertising paper or billboards, use the inching mode of the electric glue gun 100. In the jogging mode, the electric glue gun 100 will produce glue every preset time, and make intervals on the advertising paper or billboards. The colloid of the distance can not only install the advertising paper or billboard on the fixed object, but also avoid the glue coming out all the time and reduce unnecessary waste.

The non-jog mode of the electric glue gun 100 includes a speed control mode. In the speed regulation mode, the user can arbitrarily adjust the speed of the motor 11 of the electric glue gun 100 according to needs, so that the output power of the electric glue gun 100 is different. As shown in Figure 4, the electric glue gun 100 forms or is connected with the governor 17 that is used to regulate the extruding rate of glue, and described governor 17 is connected with trigger 16, and is electrically connected with controller 41, and described speed governor The device 17 is used to realize the speed regulation mode of the electric glue gun 100.

As an option, the governor 17 includes a rod 171 and a sliding rheostat (not shown). Specifically, one end of the rod 171 is associated with the trigger 16 , the other end of the rod 171 is connected with the moving end of the sliding rheostat, and the sliding rheostat is connected to the circuit to realize electrical connection with the controller 41 . The rod 171 can push the moving end of the sliding rheostat to move under the push of the trigger 16 so as to change the resistance of the connecting circuit of the sliding rheostat. That is to say, when the trigger 16 is pressed for different strokes, the resistance value of the sliding rheostat connected to the circuit changes, and the changed resistance value can be converted into different voltage signals through related circuits, and the controller 41 according to the different The voltage signal controls the motor 11 to output different rotational speeds. Specifically, the controller 41 can obtain the rotation speed of the motor 11 desired by the operator according to the voltage signal of the governor 17 and the pre-stored voltage-speed table or voltage-speed formula, so that the control signal output by the controller 41 controls the motor 11 Output the rotational speed desired by the operator.

In this way, the operation switch is set to achieve different rotational speed outputs of the motor 11 , so that the electric glue gun 100 can output different powers to meet the requirements of different working conditions.

As an option, the non-jog mode of the electric glue gun 100 also includes a constant speed mode. When the electric glue gun 100 is in the constant speed mode, the motor 11 can be fixed at a fixed speed independent of the pulling amount of the trigger 16. Adjust to a better speed, and work with the better speed, so as to ensure the best working effect. Simultaneously, it can also avoid the fatigue of the operator who keeps pulling the trigger 16 for a long time, and may reduce the working effect and quality of work due to the instability of the rotating speed of the motor 11 caused by the shaking of the operator's hands. In this way, even if the operator does not pull the trigger continuously, the motor 11 can maintain a fixed rotational speed output. In the constant speed mode, the motor 11 can maintain a fixed speed in a gear, which can prevent the user from pressing the trigger all the time, which is difficult and inconvenient, and the user’s hands may shake and cause the speed to be unstable. In the constant speed mode, The amount of glue is uniform. In some occasions with aesthetic requirements, for example, when sealing glass for doors and windows, especially at the corners, there should be no colloid pushing, which will affect the appearance.

The electric glue gun 100 also includes a mode switching switch 20 , which is operatively triggered to switch the electric glue gun 100 between an inching mode and a non-inching mode. As an option, the mode switching switch 20 is operatively triggered to switch the electric glue gun 100 among the inching mode, the speed regulating mode and the constant speed mode.

As an option, the mode switch 20 of the electric glue gun 100 has multiple states corresponding to multiple modes, for example, when the electric glue gun 100 has a jog mode and a speed regulation mode, the mode switch 20 has a corresponding point The first state of the manual mode and the second state corresponding to the speed regulation mode.

As an option, the electric glue gun 100 has a jog mode, a speed regulation mode and a constant speed mode, and the mode switching switch 20 has a first state corresponding to the jog mode, a second state corresponding to the speed regulation mode and a constant speed mode. The third state of the fast mode.

When the operator is installing advertising paper or billboards, the operator triggers the mode switching switch 20 to the first state, and uses the jog mode of the electric glue gun 100. In the jog mode, the electric glue gun 100 will Glue out, and glue the glue at a distance on the advertising paper or billboard, so that the advertising paper or billboard can be installed on the fixed object, and it can also avoid continuous glue out and reduce unnecessary waste.

When the operator needs to adjust the speed of the motor 11 so that the electric glue gun 100 works in the speed regulation mode, he can trigger the mode switching switch 20 to the second state, so that the motor 11 works at the speed corresponding to the pulling amount of the trigger 16. The glue gun 100 enters the speed regulation mode. If it needs to continue to work according to the readjusted current speed, the mode switching switch 20 can be triggered again, so that the motor 11 continues to run according to the current speed. The speed regulation function of the trigger 16 becomes invalid, and the electric glue gun 100 Enter speed control mode.

When the operator operates the trigger 16 to continue working and needs to output continuous work at a certain fixed speed, the third state of the mode switching switch 20 can be triggered when the motor 11 is at the fixed speed. At this time, the controller 41 can obtain the electric glue The signal of the current motor speed of the gun 100 can be used to control the motor 11 to continue running at this speed according to the signal, so that the output of the electric glue gun 100 is constant. At this time, the speed regulation function of the trigger 16 is invalid. The controller 41 is disposed on the circuit board 18 .

In this way, by triggering the mode switching switch 20 , the electric glue gun 100 is switched between the inching mode and at least one non-inching mode.

As an option, the electric glue gun 100 also includes a memory (not shown) with a storage function, and the data stored in the memory will not be lost after power off. The memory is disposed in the housing 12 , and in some specific implementations, the memory is electrically connected to the controller 41 , and the memory may also be integrated in the controller 41 . The memory can store the state of the electric glue gun 100 before the power failure, and the state includes the working mode of the electric glue gun 100 before the power failure and the rotating speed of the motor 11, and the working mode includes speed regulation mode, constant speed mode, Jog mode. The state of the electric glue gun 100 before the power failure can be recorded by setting the memory with the power-off storage function, so that when the electric glue gun 100 tool is powered off and restarted, the electric glue gun 100 still operates in the state before the power failure In this way, for the same batch of work objects, the motor 11 runs at the same speed after the speed regulation, which can ensure a more consistent and better working effect of the electric glue gun 100, and can also prevent the electric glue gun 100 from being powered off. Trouble with re-speeding.

As an option, the electric glue gun 100 is also provided with a control mechanism that controls the upper limit of the output power of the electric glue gun 100. The control mechanism includes a shift switch 19, and the shift switch 19 is provided with a plurality of gears. The motor 11 has different top speeds in the multiple gears. For example, the gear shift switch 19 is provided with 6 gears, the first gear corresponds to the motor speed of 0-4000rpm, the second gear corresponds to the motor speed of 0-8000 rpm... the sixth gear corresponds to the motor speed of 0-24000 rpm, in different gears, the trigger is at At the same position, the corresponding motor speed is also different. In some specific implementations, the shift switch 19 is a toggle button, and the output power gear of the electric glue gun 100 is regulated by adjusting the toggle button. It can be understood that the toggle button can be provided with multiple gears, which can realize the variable speed adjustment of the electric glue gun 100 in multiple gears, and each gear sets the maximum speed of the motor 11, limiting the electric glue gun 100 in each gear. The maximum output power is lower, so as to prevent the operator from pulling the trigger 16 too much to cause an undesired excessive output power or rotational speed, which is safe and provides a better user experience for the operator. At the same time, the settings of multiple gears correspond to different speed regulation ranges, so that users can choose different speed regulation ranges according to different needs, which is convenient for operation.

The electric glue gun 100 also includes a power supply, which is used to provide electric energy for the electric glue gun 100 . In some embodiments, the electric glue gun 100 is powered by a DC power supply, more specifically, the electric glue gun 100 is powered by a battery pack 10, and the battery pack 10 cooperates with a corresponding power circuit, such as a DC-DC conversion chip, to power the motor 11. As well as supplying power to the circuit components on the circuit board. Those skilled in the art should understand that the power supply is not limited to the scenario where the battery pack 10 is used, and the power supply for each circuit element can also be realized through commercial power, AC power, and corresponding rectification, filtering and voltage regulation circuits.

In this embodiment, the electric glue gun 100 is powered by a battery pack 10 , and the battery pack 10 is detachably mounted to the electric glue gun 100 . The battery pack 10 includes a case and battery cells. The battery cell is housed in the case for storing energy, which can be repeatedly charged and discharged. The shell is formed with a connection interface for mating connection with the battery pack joint of the electric glue gun 100 .

The operation of the electric glue gun 100 also depends on the circuit system, the circuit system includes circuit components, the circuit components are arranged on the circuit board 18 , and the circuit board 18 is located in the casing 12 .

Referring to FIG. 4 , as the first embodiment, the electric glue gun 100 further includes: a controller 41 , a power circuit 42 , and a drive circuit 43 .

The controller 41 is used to control the operation process of the electric glue gun 100 . Optionally, the controller 41 includes a single-chip microcomputer or microcontroller (MCU), ARM chip (high-performance RISC (reduced instruction set computing, reduced instruction set computing) microprocessor, Advanced RISC Machine), DSP chip (general digital any one or combination of signal processors).

The power supply circuit 42 is electrically connected with the controller 41 and is used to convert the electric energy from the power supply into electric energy for the controller 31 and other circuit components to work. In this embodiment, the power supply is the battery pack 10 , therefore, the power supply circuit 42 may include a DC-DC conversion chip. Those skilled in the art should understand that the power supply is not limited to the scenario where the battery pack 10 is used, and the power supply to each circuit element can also be realized through commercial power, AC power, and corresponding rectification, filtering, and voltage regulation circuits. The circuit includes rectification, filtering and voltage regulation circuits.

As an option, the electric glue gun 100 also includes a current switch 44 associated with the trigger 16 , the current switch 44 is connected in series with the main circuit, allowing or prohibiting the current of the battery pack 10 from flowing to the electric glue gun 100 . One end of the current switch 44 is electrically connected to the power terminal of the battery pack 10 , and the other end is connected to the power circuit 42 . When the current switch 44 is not connected, the power circuit 42 is powered off, the power circuit 42 cannot supply power to the controller 41, the controller 41 does not work, and the electric glue gun 100 does not work; when the current switch 44 is connected, the power circuit 42 is Electricity, the controller 41 controls the motor 11 to work after obtaining electric energy from the power supply circuit 33 . As an implementation, when the trigger 16 is pressed to the first position, the current switch 44 is turned on, and the motor 11 starts; when the current switch 44 is released to the second position, the motor 11 stops driving the push rod forward.

In some other embodiments, the current switch 44 is not set in association with the trigger 16, but the state of the trigger 16 is detected by setting a trigger state detection device (not shown), and the trigger state detection device is electrically connected with the controller 41 to control The controller 41 controls the on or off of the current switch according to the state of the trigger detected by the trigger state detection device. When the trigger 16 is in the initial state and is pressed to the first position, the controller 41 controls the current switch 44 to be connected. When the trigger 16 is released from the pressed state to the second position, the controller 41 controls the current switch 44 to turn off.

In this embodiment, in order to reduce the size of the whole machine, the motor 11 is set as a brushless motor, of course, the motor 11 can also use other motors, which is not limited here. In order to control the operation of the motor, the electric glue gun 100 also includes a drive circuit 43 , which is electrically connected to the controller 41 and used to control the operation of the motor 11 . The drive circuit 43 is electrically connected to the three-phase windings of the brushless motor for driving the rotor of the brushless motor to rotate, and the drive circuit 43 includes switching elements. The drive circuit 43 shown in Figure 4 includes switching elements VT1, VT2, VT3, VT4, VT5, VT6, the switching element VT1 and the switching element VT4 are connected to the first phase winding A, and the switching element VT3 and the switching element VT6 are connected to the second phase winding A. The winding B is connected, and the switching element VT5 and the switching element VT2 are connected to the third-phase winding C. The switching elements VT1~VT6 can be selected from field effect transistors, IGBT transistors and the like. The gate terminal of each switching element is electrically connected to the driving signal output end of the controller 41 , and the drain or source of each switching element is electrically connected to the winding of the brushless motor 17 . The switching elements VT1-VT6 change their ON state according to the driving signal output by the controller 41, thereby changing the voltage state of the battery pack 10 loaded on the winding of the brushless motor to drive the brushless motor to run.

This embodiment adopts a brushless motor, which greatly reduces the size of the electric glue gun 100. At the same time, by passing the push rod 142 through the transmission mechanism 143, the structural complexity of the transmission mechanism 143 is also greatly reduced, further reducing The spatial position occupied by the transmission mechanism 143 is optimized, thereby optimizing the size of the electric glue gun 100 as a whole, making the electric glue gun 100 lighter and more convenient for long-term operation of the user, and reducing the fatigue of the long-term operation of the user.

However, in non-jog mode (for example, speed control mode or constant speed mode), the glue may flow out or seep out of the nozzle of the glue gun when the electric glue gun stops working, causing nozzle dirt and adding additional cleaning glue human cost and time.

In order to solve the above problems, in a first aspect of the present invention, an electric glue gun and a control method thereof are provided, which can effectively avoid the above problems.

In this embodiment, the controller 41 is configured to control the motor 11 so that the push rod 142 retreats a preset distance after the motor 11 stops driving the push rod forward. Specifically, when the electric glue gun 100 is in a non-jog mode (for example, a constant speed mode or a speed regulation mode), the controller 41 is configured to control the motor 11 to reverse after the motor 11 stops driving so that the push rod 142 retreat a preset distance.

As mentioned above, the stop of the motor to drive the push rod forward means that after the motor 11 exits the running state of driving the push rod forward, it enters the braking state until the motor 11 stops rotating, or the motor 11 exits the normal running state without forced braking, but due to The speed of the resistance gradually decreases until the motor stops rotating naturally. As an option, the motor 11 is controlled by the trigger 16 to stop driving the push rod to advance. Of course, it is also possible to control the motor 11 to stop driving the push rod forward by detecting other signals.

In order to achieve the above object, the electric glue gun 100 also includes a mode detection part 45, and the mode detection part 45 is used to detect whether the electric glue gun 100 is in the jog mode or the non-jog mode; The controller 41 is electrically connected.

As an implementation, the mode detection unit 45 includes a timing unit (not shown), which is used to determine the normal running time of the motor, specifically, the timing unit is used to detect the normal operation time of the motor 13 every time time, the controller 41 is configured to determine whether the electric glue gun 100 is in the inching mode or the non-inching mode according to the normal running time of the motor. The normal running time of the motor refers to the time during which the motor maintains a normal speed, which does not include the time during which the motor is in a braking state. Optionally, the normal running time of the motor is the running time of the motor from zero speed to before braking, and the timing unit is used to determine the running time of the motor 13 each time the speed increases from zero speed to before the motor brakes. As an option, the normal running time of the motor is the running time of the motor at a constant speed, and the timing unit is used to determine that the speed of the motor 13 is kept above the normal running speed from zero speed to the first time after reaching the normal running speed. operation hours. The normal running speed mentioned refers to the speed of the motor when the electric glue gun works normally.

As an option, the controller 41 is configured to determine that the electric glue gun 100 is in the non-jog mode when the normal running time of the motor is greater than or equal to a preset time. Of course, the timing unit of the mode detection unit 45 can also start timing after the trigger 16 is released, and the timing time is T. If the timing time T is greater than the preset threshold, it is determined that the electric glue gun 100 is in the non-jog mode.

The controller 41 is configured to control the motor 11 so that the push rod 142 retreats a preset distance after judging that the electric glue gun 100 is in the non-jog mode and the motor 11 stops driving the push rod forward. As an option, after judging that the electric glue gun 100 is in the non-jog mode and the motor 11 stops driving, the controller 41 controls the motor 11 to reverse to make the push rod 142 retreat a preset distance.

As an option, the preset distance that the push rod 142 retreats is positively correlated with the rotation speed of the motor 11 . In this way, the preset distance of the retraction of the push rod 142 is dynamically adjusted, that is, the length of the reverse rotation of the motor 11 is adjusted, so that the retraction distance of the push rod 142 is positively correlated with the speed of the electric glue gun 100, and the retraction of the push rod 142 can be avoided. Insufficient colloid overflow still exists or push rod 142 retracts too long and causes push rod 142 to loosen and push rod 142 will go too much empty stroke when starting up next time, waste time and energy.

Further, the electric glue gun 100 has multiple gears, the motor 11 has different maximum rotation speeds in the multiple gears, and the preset distances for the push rod 142 to retreat in the different gears are different.

Referring to the foregoing, the shift switch 19 is provided with a plurality of gear positions, and the motor 11 has different maximum rotational speeds in the plurality of gear positions. For example, the gear shift switch 19 is provided with 6 gears, the first gear corresponds to the motor speed of 0-4000rpm, the second gear corresponds to the motor speed of 0-8000 rpm... the sixth gear corresponds to the motor speed of 0-24000 rpm, the higher the gear, the corresponding motor The higher the maximum speed, the higher the speed. Under different gear positions, when the trigger 16 is in the same position, the rotation speed of the motor 11 is correspondingly different. As an option, the controller 41 controls the motor 11 to make the push rod 142 retract a preset distance that is positively correlated with the rotational speed of the motor 13 . For example, when the shift switch 19 is in the first gear position, the controller 41 controls the motor 11 so that the preset distance for the push rod to retreat is positively correlated with the gear position of the shift switch 19. The higher the gear position, the push rod 142 retreats. The higher the preset distance, for example, when the shift switch 19 is in the 1st gear position, the push rod 142 retreats 1mm; when the gear shift switch 19 is in the 2nd gear position, the push rod 142 retreats 2mm; The push rod 142 retreats 2.5 mm. When the shift switch 19 is in the 4th gear position, the push rod 142 retreats 3 mm. When the gear shift switch 19 is in the 5th gear position, the push rod 142 retreats 4.5 mm. When the gear shift switch 19 is in the 6th gear position Push rod 142 retreats 5.5mm.

As another embodiment, it is judged whether the electric glue gun 100 is in the inching mode or the non-inching mode by detecting the time from pressing the trigger 16 to releasing it. For example, by setting a proximity switch on the handle 122 to detect whether the trigger 16 is in the pressed position or the released position, the timing unit of the mode detection part 45 can obtain the time when the trigger 16 switches between pressing and releasing according to the position of the trigger 16, thereby The controller 41 judges whether the electric glue gun 100 is in the inching mode or in the non-inching state according to the time. Of course, forming switches, signal switches, etc. can also be used instead of the proximity switches.

Through the above method, in the non-jog mode, when the controller 41 of the electric glue gun 100 detects that the trigger is released, it controls the motor 11 to reverse for a certain period of time so that the push rod 142 retreats a preset distance, which can effectively prevent the motor from 11 The colloid overflows after the release after stopping the drive.

However, there will be a problem in this way. In some cases, when there is no glue in the electric glue gun 100 and no-load operation (for example, under the situation of cleaning the glue cartridge), it is not necessary to drive the push rod forward and backward after the motor 11 stops. The push rod 142 is retreated to reduce unnecessary operations, and save energy while being easy to operate.

In order to solve the above problems, in this embodiment, the electric glue gun 100 is further provided with a load detection part 46 for detecting a load operation event of the electric glue gun 100 . The output end of the load detection part 46 is electrically connected to the controller 41, and the controller 41 judges whether a load operation event occurs in the electric glue gun 100 according to the detection result of the load detection part 46, and determines whether a load operation event occurs in the electric glue gun 100 And after the motor 11 is stopped to drive the push rod forward, the motor 11 is controlled to reverse to make the push rod 142 retreat a preset distance, so that the colloid will not overflow after stopping gluing.

Referring to FIG. 5 , the circuit system of an electric glue gun 100 as an embodiment includes: a controller 51, a power supply circuit 52, a drive circuit 53, a current switch 54, a mode detection unit 55, a power supply device 10, a motor 11, a trigger 16, Speed governor 17, shift switch 19, mode switching switch 20. The above-mentioned circuit components are the same or similar to those of the foregoing embodiments, and will not be repeated here.

As a first embodiment, the load detection unit 46 shown in FIG. 4 may specifically be the current detection circuit 46 shown in FIG. 5 , which detects whether the electric glue gun 100 is working under load by detecting the current flowing to the motor 11 . Specifically, the current detection circuit 46 is electrically connected to the main circuit for detecting the current flowing to the winding of the motor 11 . When the push rod 142 pushes the colloid to move, the push rod 142 will be subjected to the reaction force of the colloid, the load of the motor 11 will be larger than that of no-load, and the current at this time will also be larger than that of no-load, so it can be detected by detecting the flow to the motor. 11 to detect whether the electric glue gun 100 has a load working event. The output terminal of the current detection circuit 46 is electrically connected to the controller 41, and the controller 41 judges whether a load operation event occurs in the electric glue gun 100 according to the detection result of the current detection circuit 46, and judges that the electric glue gun 100 occurs After the load operation event and the motor 11 stops driving the push rod forward, the motor 11 is controlled to make the push rod 142 retreat a preset distance.

Specifically, the controller 41 compares the detected current value from the current detection circuit 46 with the preset current threshold value, the preset current threshold value corresponds to the inflection point of the current change, that is, the current when the load occurs, if the current If the detection value is greater than the preset current threshold, it is judged that the electric glue gun 100 has a load working event; otherwise, it is judged that the electric glue gun 100 has not had a load working event. preset distance.

In some embodiments, the electric glue gun 100 detects whether the motor stops driving the push rod forward through a trigger state detection device (not shown). The trigger state detection device is used to detect whether the trigger 16 is in a pressed state or a released state. When the trigger 16 is in a released state, the electric motor 11 stops driving the push rod to advance. The trigger state detection device is electrically connected to the controller 41, and the detection result is sent to the controller 41. When the load detection part 46 detects that the electric glue gun 100 has a load working event, and when the trigger state detection device detects that the trigger 16 is released, The controller 41 controls the motor 11 to retract the push rod 142 by a preset distance.

The trigger state detection device can be a circuit composed of electronic components, for example: the trigger state detection device can be a trigger state detection circuit composed of a signal switch associated with the trigger 16, and the controller 41 judges the state of the trigger 16 according to the state of the signal switch; The trigger state detection device can also be a trigger state detection circuit composed of a sliding rheostat associated with the trigger, and the controller 41 judges the trigger state according to the voltage signal converted from the resistance value of the sliding rheostat access circuit; the trigger state detection device can also be It is a sensor capable of sensing the state of the trigger, such as a position sensor that detects the position of the trigger, a travel switch, a proximity switch, and a signal switch associated with the trigger; of course, the trigger state detection device can also be shared with the above-mentioned governor 17, when the trigger When the trigger 16 is released or pressed, the voltage signal is different or the change of the voltage signal is different. In this way, it is detected whether the trigger 16 is in a pressed state or a released state.

In some other implementations, the controller 41 determines that the motor 11 is in the stop driving state when the motor 11 exits the normal operation state and enters the braking state or the motor exits the normal operation state and is in the natural shutdown state. When the load detection part 46 detects that the electric glue gun 100 has a load working event and determines that the motor 11 is in a stop driving state, the controller 41 controls the motor 11 to reverse to make the push rod 142 retreat a preset distance.

As an option, the electric glue gun 100 also includes a load working time determination part 47, which is used to determine the load working time of the electric glue gun 100 (that is, the time for the electric glue gun 100 to glue), and the controller 41 controls according to the load working time. The motor 11 reverses for a preset duration. The load working time of the electric glue gun 100 is positively correlated with the preset time of the motor 11 reversing. As an option, the load working duration determination unit 47 is connected to the load detection unit 46 for determining the load working duration according to the result of the load detection unit 46 .

In this way, according to the working hours of the electric glue gun 100 load, the length of the reverse rotation of the motor 11 is dynamically adjusted to make the push rod retreat by different distances. At the same time, pushing the push rod 142 back for a fixed distance may cause the push rod 142 to retreat far enough to still drip glue, or the retract distance is too long to cause the push rod 142 or the electric glue gun to loosen and push the rod 142 in time. There are too many empty trips taken in the next startup, wasting time and energy.

The present invention also provides a control method for the electric glue gun 100, including:

Determine whether the electric glue gun is in jog mode or non-jog mode;

Judging that the electric glue gun has a load working event;

When it is judged that the electric glue gun has a load working event and the electric glue gun is in the non-jog mode and the motor stops driving the push rod forward, control the reverse rotation of the motor to make the push rod fall back to the preset distance.

In the embodiment of the present invention, by judging whether the electric glue gun 100 is in the jog mode or the non-jog mode, the push rod is not retreated in the jog mode, but the push rod is retreated in the non-jog mode, which is more suitable for users. operating habits.

As a first implementation, the control method of the electric glue gun 100 includes:

Recognize the described mode of the electric glue gun;

Determine whether the electric glue gun is in jog mode or non-jog mode;

obtaining current flowing to said motor;

When the current flowing to the motor is greater than or equal to a preset current threshold, it is judged that a load working event occurs in the electric glue gun;

When it is judged that the electric glue gun has a load working event and the electric glue gun is in the non-jog mode and the motor stops driving the push rod forward, control the reverse rotation of the motor to make the push rod fall back to the preset distance.

Referring to Fig. 6, as an option, the specific control method of the above-mentioned electric glue gun 100 is performed according to the following steps:

S60: Start the electric glue gun;

Install the battery pack 10 to the electric glue gun 100, and press the trigger 16 to start the electric glue gun 100, and the controller 51 is powered on.

S61: identifying the mode described in the electric glue gun;

As mentioned above, the mode of the electric glue gun 100 is detected by the mode detection part 55 , and the controller 51 identifies the mode of the electric glue gun according to the result of the mode detection part 55 .

S62: judging whether the electric glue gun 100 is in the jog mode;

The controller 51 determines whether the electric glue gun 100 is in the jog mode, if yes, then go to step S63, the electric glue gun 100 runs according to the jog mode until the end, if not, go to step S64.

S63: the electric glue gun 100 operates in jog mode;

When it is judged that the electric glue gun 100 is in the jog mode, it continues to run in the original mode until the end, and does not control the motor to make the push rod retreat a preset distance.

S64: Obtain the motor current;

When judging that the electric glue gun 100 is not in the inching mode but in the non-inching mode, the current detection circuit 56 detects the current flowing to the motor in real time, and the controller 51 acquires the current flowing to the motor 11 from the current detection circuit 56 .

S65: judging whether the current detection value is greater than or equal to a preset threshold and whether the motor stops driving;

The controller 51 compares the obtained motor current detection value with the preset threshold value, and judges whether the current detection value is greater than or equal to the preset threshold value, and if it is judged that the current detection value is greater than or equal to the preset threshold value, then it is judged that the electric glue gun 100 has A load working event, otherwise it is judged that no load working event has occurred in the electric glue gun 100 .

At the same time, it is judged whether the motor 11 stops driving the push rod to advance. As an option, the trigger state is monitored in real time by the aforementioned trigger state detection device, and the controller 51 detects the trigger state of the device from the trigger state; as an option, the controller enters the braking state or Motor 11 exits the running state that drives push rod forward and judges motor 11 to stop driving when shutting down naturally.

If it is judged that the electric glue gun 100 has a load working event and the motor 11 is in the state of stopping driving the push rod forward, then go to step S66, otherwise go to step S64.

S66: Control the reverse rotation of the motor so that the motor retreats a preset distance;

After judging that the electric glue gun 100 has a load working event and the motor 11 is in the state of stopping driving the push rod forward, the controller 51 controls the motor 11 to reverse, and stops the motor after the push rod 142 retreats a preset distance. In actual operation, the push rod 142 can be retracted by a preset distance by controlling the motor 11 to reverse the preset time according to a certain speed, and the preset time can be a fixed value, which is preset by the user according to actual needs; The preset duration can also be a variable value. As mentioned above, the motor 11 can be reversed for different durations according to the different gear positions of the shift switch 19 so that the push rod 142 can retreat by different distances. The preset duration can also be determined by the working duration of the electric glue gun 100 under load, see below for details.

S67: End.

As an option, the electric glue gun 100 also includes a load working time determination part 57, which is used to determine the load working time of the electric glue gun 100 (that is, the time for the electric glue gun 100 to glue), and the controller 51 controls according to the load working time. The motor 11 reverses for a preset duration. The load working time of the electric glue gun 100 is positively correlated with the preset time of the motor 11 reversing.

Referring to FIG. 5 , as an option, the input terminal of the load working duration determination unit 57 is electrically connected to the current detection circuit 56 , and its output terminal is electrically connected to the controller 51 . The load working time determination unit 57 determines the load working time according to the detection result of the current detection circuit 56 .

The load working duration determination unit 57 determines the load working duration according to the current change detected by the current detection circuit 46 . As an implementation manner, the load operation duration determination part 57 may specifically include a comparator and a timer or a counter, the load operation duration determination part 57 acquires the current detection value of the current detection circuit 56, and the comparator of the load operation duration determination part 57 converts the The current detection value described above is compared with the preset current threshold value. When the current detection value is greater than or equal to the preset current threshold value, the timer or counter of the load working time determination part 57 starts timing until the motor stops driving the push rod forward Stop timing or counting, and the result of the timer or counter is sent to the controller 51 as the load working duration. The controller 51 obtains the load working time determined by the load working time determining part 57, and determines the preset time period of the motor reverse rotation according to the load working time length through a formula or a look-up table, and then controls the motor 57 to reverse the preset time length To make the push rod 142 retreat a preset distance.

Referring to Fig. 7, as a second embodiment, the control method of the electric glue gun 100 is as follows:

S70: Start the electric glue gun;

Install the battery pack 10 to the electric glue gun 100, and press the trigger to start the electric glue gun 100, and the controller 51 is powered on.

S71: identifying the mode described in the electric glue gun;

As mentioned above, the mode of the electric glue gun 100 is detected by the mode detection part 55 , and the controller 51 identifies the mode of the electric glue gun according to the result of the mode detection part 55 .

S72: judging whether the electric glue gun 100 is in the jog mode;

The controller 91 judges whether the electric glue gun 100 is in the jog mode, if yes, then go to step S63, the electric glue gun 100 runs according to the jog mode until the end, if not, go to step S74.

S73: the electric glue gun 100 operates in jog mode;

When it is judged that the electric glue gun 100 is in the jog mode, it continues to run in the original mode until the end, and does not control the motor to make the push rod retreat a preset distance.

S74: Obtain the motor current;

When judging that the electric glue gun 100 is not in the inching mode but in the non-inching mode, the current detection circuit 56 detects the current flowing to the motor in real time, and the controller 51 acquires the current flowing to the motor 11 from the current detection circuit 56 .

S75: judging whether the current detection value is greater than or equal to a preset threshold and whether the motor stops driving the push rod forward;

The controller 51 compares the obtained motor current detection value with the preset threshold value, and judges whether the current detection value is greater than or equal to the preset threshold value, and if it is judged that the current detection value is greater than or equal to the preset threshold value, then it is judged that the electric glue gun 100 has A load working event, otherwise it is judged that no load working event has occurred in the electric glue gun 100 .

At the same time, it is judged whether the motor 11 stops driving the push rod to advance. As an option, the trigger state is monitored in real time by the aforementioned trigger state detection device, and the controller 51 detects the trigger state from the trigger state detection device; as an option, the controller enters the brake state when the motor exits the running state of driving the push rod forward Or motor 11 exits the running state that drives push rod forward and judges motor 11 to stop driving when shutting down naturally.

If it is judged that the electric glue gun 100 has a load working event and the motor 11 is in the stop driving state, then go to step S76, otherwise go to step S74.

S77: Obtain the working hours of the load of the electric glue gun;

The load working time determination unit 57 determines the load working time according to the current change detected by the current detection circuit 56 .

As an implementation, the load working time determination unit 57 may specifically include a comparator and a timer or a counter. The load working time determination unit 57 obtains the current detection value of the current detection circuit 56. When the current detection value is greater than or equal to the preset current threshold , the timer or counter of the load working duration determining part 57 starts counting until the trigger is released to stop timing or counting, and the result of the timer or counter is sent to the controller 51 as the load working duration. The controller 51 acquires the load working duration determined by the load working duration determination unit 57 .

S77: Determine the preset duration of motor reverse rotation;

The controller 57 determines the preset duration of the reverse rotation of the motor 11 through a formula or a look-up table according to the load working duration. The preset duration is positively correlated with the load working duration, that is, the longer the load working duration, the longer the preset duration for the motor to reverse. In this way, the length of the reverse rotation of the motor 11 is dynamically adjusted, so that the retraction distance of the push rod 142 is positively correlated with the working time of the electric glue gun 100 under load, which can avoid the glue overflow phenomenon or the retraction of the push rod 142 when the push rod 142 is insufficiently retracted. If the distance is too long, the push rod 142 or the glue gun will become loose, and the empty travel of the push rod 142 will be too much when the next startup is started, which will waste time and energy.

S78: Control the motor to reverse for a preset time to make the push rod retreat a preset distance;

The controller 51 controls the reverse rotation of the motor 11 and stops the motor after reaching the determined preset duration of the reverse rotation of the motor, so that the push rod 142 retreats a preset distance.

S79: End.

Referring to Fig. 8, the circuit system of an electric glue gun 100 as another embodiment includes: a controller 81, a power supply circuit 82, a drive circuit 83, a current switch 84, a mode detection unit 85, a battery pack 10, a motor 11, and a trigger 16 , speed governor 17, shifting switch 19, mode switching switch 20. The above-mentioned circuit components are the same or similar to those of the foregoing embodiments, and will not be repeated here.

In this embodiment, the aforementioned load detection unit 46 may specifically be the pressure detection device 86 in this embodiment, which detects the load working event of the electric glue gun 100 by detecting the pressure in the glue cartridge 15 . Specifically, the pressure detection device 86 is installed in but not limited to the rubber cartridge 15, and the pressure detection device 68 may specifically be a pressure sensor capable of sensing pressure changes. For example, the pressure sensor can be installed on the top 142a of the front end of the push rod 142, and it can sense whether the front end top 142a of the push rod 142 is in contact with the glue and is under the pressure of the glue. There is no glue in the barrel. In this case, when the electric glue gun 100 is working, the pressure of the pressure sensor at the front end of the push rod 142 is different from the pressure when the electric glue gun 100 is fully loaded. Therefore, the pressure in the glue barrel can be detected by the pressure detection device 86. To detect whether the electric glue gun 100 is working under load. The output end of the pressure detection device 86 is connected to the controller 41, and the controller 41 judges whether the electric glue gun 100 has a load operation event according to the detection result of the pressure detection device 86, and determines whether the electric glue gun has a load operation event. event and after the trigger is released, control the motor 11 to reverse for a preset period of time.

The present invention also provides a control method of the third embodiment of the electric glue gun 100, including:

Identify the mode of the electric glue gun;

Determine whether the electric glue gun is in jog mode or non-jog mode;

Obtain and detect the pressure in the rubber cartridge;

When the pressure in the glue cartridge is greater than or equal to the preset pressure, it is judged that the electric glue gun has a load working event;

When it is judged that the electric glue gun has a load working event and the motor is in the state of stopping driving the push rod forward, the reverse rotation of the motor is controlled so that the push rod retreats a preset distance.

Referring to FIG. 9 , specifically, the control method of the third embodiment of the above-mentioned electric glue gun 100 specifically includes:

S90: Start the electric glue gun;

Install the battery pack 10 to the electric glue gun 100, and press the trigger to start the electric glue gun 100, and the control 81 is powered on.

S91: identifying the mode described in the electric glue gun;

As mentioned above, the mode of the electric glue gun 100 is detected by the mode detection part 85 , and the controller 51 identifies the mode of the electric glue gun 100 according to the result of the mode detection part 85 .

S92: judging whether the electric glue gun is in jog mode;

The controller 81 judges whether the electric glue gun 100 is in the jog mode according to the judgment of the mode detection part 85, if yes, then proceeds to step S93, and the electric glue gun 100 runs until the end according to the jog mode, if otherwise, proceeds to step S94.

S93: The electric glue gun operates in jog mode;

When it is judged that the electric glue gun 100 is in the jog mode, it continues to run in the jog mode until the end, and does not control the motor 11 to make the push rod 142 retreat a preset distance.

S94: Obtain the pressure detection value in the rubber cartridge;

The pressure detection device 86 detects the pressure in the rubber cartridge 15 in real time. The pressure detection device 68 is specifically a pressure sensor, the pressure sensor is installed on the front end of the push rod 142, and it can sense whether the front end of the push rod 142 contacts the colloid and is subjected to the pressure of the colloid, and the controller 41 obtains the pressure of the pressure sensor from the pressure detection device 86. detection value.

S95: judging whether the pressure detection value is greater than or equal to the preset pressure threshold and whether the motor stops driving the push rod to advance;

The controller 81 compares the obtained pressure detection value with the preset pressure threshold, and judges whether the current detection value is greater than or equal to the preset current threshold, and if it judges that the pressure detection value is greater than or equal to the preset current threshold, then judges whether the electric current is greater than or equal to the preset current threshold. The glue gun 100 has a load working event; otherwise, it is determined that the electric glue gun 100 does not have a load working event.

At the same time, it is judged whether the motor 11 stops driving the push rod to advance. As an option, the trigger state is monitored in real time by the aforementioned trigger state detection device, and the controller 81 detects the trigger state of the device from the trigger state; When running state and natural shutdown, it is judged that the motor 11 stops driving.

If it is judged that the electric glue gun 100 has a load working event and the motor 11 is in the stopped driving state, then go to step S96, otherwise go to step S94.

S96: controlling the motor to make the push rod return to a preset distance;

After judging that the electric glue gun 100 has a load working event and the motor 11 stops driving the push rod forward, the controller 81 controls the motor 11 to retreat the push rod 142 by a preset distance. In actual operation, the push rod 142 can be retracted by a preset distance by controlling the motor 11 to reverse the preset time according to a certain speed, and the preset time can be a fixed value, which is preset by the user according to actual needs; The preset duration can also be a variable value. As mentioned above, the motor 11 can be reversed for different durations according to the different gear positions of the shift switch 19 so that the push rod 142 can retreat by different distances. The preset duration can also be determined by the working duration of the electric glue gun 100 under load, see below for details.

S97: End.

Referring to FIG. 8 , as an option, the electric glue gun further includes a load duration determination part 87 , the input end of the load operation duration determination part 87 is electrically connected to the pressure detection device 86 , and its output end is electrically connected to the controller 81 . The load working duration determination unit 87 determines the load working duration according to the detection result of the pressure detection device 86 .

Specifically, the load working duration determination unit 87 determines the load working duration according to the pressure change detected by the pressure detection device 86 . As an implementation manner, the load working duration determining part 87 may specifically include a comparator and a timer or a counter. The load working duration determining part 87 obtains the pressure detection value of the pressure detection device 86, and the comparator of the load working duration determining part 87 converts the The pressure detection value described above is compared with the preset pressure threshold value. When the pressure detection value is greater than or equal to the preset pressure threshold value, the timer or counter of the load working time determination part 87 starts counting until the motor stops driving the push rod forward Stop timing or counting, and the result of the timer or counter is sent to the controller 81 as the load working duration. The controller 81 obtains the load working time determined by the load working time determining part 87, and determines the preset time of motor reverse rotation according to the load working time through formula or look-up table, and then controls the motor 11 to reverse the preset time To make the push rod 142 retreat a preset distance.

8 and 10, the control method of the fourth embodiment of the electric glue gun 100 is similar to the control method of the second embodiment of the electric glue gun 100 above, the only difference is that the load detection part 46 is specifically a pressure The detection device 86 is used instead of the current detection circuit 56 . The specific process is as follows:

S100: Start the electric glue gun;

Install the battery pack 10 to the electric glue gun 100, and press the trigger to start the electric glue gun 100, and the controller 81 is powered on.

S101: Identify the mode described in the electric glue gun;

As mentioned above, the mode of the electric glue gun 100 is detected by the mode detection part 85 , and the controller 51 identifies the mode of the electric glue gun 100 according to the result of the mode detection part 75 .

S102: judging whether the electric glue gun is in jog mode;

The controller 81 judges whether the electric glue gun 100 is in the jog mode according to the judgment of the mode detection part 85, if yes, then proceeds to step S103, and the electric glue gun 100 runs until the end according to the jog mode, if otherwise, proceeds to step S104.

S103: The electric glue gun operates in jog mode;

When it is judged that the electric glue gun 100 is in the jog mode, it continues to run in the jog mode until the end, and does not control the motor 11 to make the push rod 142 retreat a preset distance.

S104: Obtain the pressure detection value in the rubber cartridge;

The pressure detection device 86 detects the pressure in the rubber cartridge 15 in real time. The pressure detection device 86 is specifically a pressure sensor, the pressure sensor is installed on the front end of the push rod 142, and it can sense whether the front end of the push rod 142 contacts the colloid and is subjected to the pressure of the colloid, and the controller 81 obtains the pressure of the pressure sensor from the pressure detection device 86. detection value.

S105: Determine whether the pressure detection value is greater than or equal to a preset threshold and whether the motor stops driving the push rod forward;

The controller 81 compares the obtained pressure detection value with the preset pressure threshold, and judges whether the current detection value is greater than or equal to the preset current threshold, and if it judges that the pressure detection value is greater than or equal to the preset current threshold, then judges whether the electric current is greater than or equal to the preset current threshold. The glue gun 100 has a load working event, otherwise it is judged that the electric glue gun 100 has no load working event.

At the same time, it is judged whether the motor 11 stops driving the push rod to advance. As an option, the trigger state is monitored in real time by the aforementioned trigger state detection device, and the controller 81 detects the trigger state from the trigger state detection device. As an option, the controller judges that the motor 11 stops driving when the motor 11 exits the forward running state of the driving push rod and enters the braking state or the motor 11 exits the forward running state of the driving push rod and stops naturally.

If it is judged that the electric glue gun 100 has a load working event and the motor 11 is in the state of stopping driving the push rod to move forward, then go to step S106, otherwise go to step S104.

S106: Obtain the working hours of the load of the electric glue gun;

The load working duration determination unit 87 determines the load working duration according to the pressure change detected by the pressure detection device 86 .

As an implementation manner, the load working duration determining part 87 may specifically include a comparator and a timer or a counter. The load working duration determining part 87 obtains the pressure detection value of the pressure detection device 86, and the comparator of the load working duration determining part 87 converts the The above-mentioned pressure detection value is compared with the preset pressure threshold value. When the pressure detection value is greater than or equal to the preset pressure threshold value, the timer or counter of the load working time determination part 87 starts counting until the motor stops driving. Or counting, the result of the timer or counter is sent to the controller 81 as the load working duration.

S107: Determine the preset duration of motor reverse rotation;

The controller 81 determines the preset duration of the motor reverse rotation according to the load working duration determined by the load working duration determining part 87 through a formula or table lookup, and then controls the motor 11 to reverse the preset duration so that the push rod 142 turns back Back off the preset distance. The controller 81 can determine the preset duration of the reverse rotation of the motor 11 through a formula or a look-up table. The preset duration is positively correlated with the load working duration, that is, the longer the load working duration, the longer the preset duration for the motor 11 to reverse. In this way, the length of the reverse rotation of the motor 11 is dynamically adjusted, so that the retraction distance of the push rod 142 is positively correlated with the working time of the electric glue gun 100 under load, which can avoid the glue overflow phenomenon or the retraction of the push rod 142 when the push rod 142 is insufficiently retracted. If the distance is too long, the push rod 142 or the glue gun will become loose, and the empty travel of the push rod 142 will be too much when the next startup is started, which will waste time and energy.

S108: Control the motor to reverse for a preset time to make the push rod retreat a preset distance;

The controller 81 controls the reverse rotation of the motor 11 according to the determined preset time period of the reverse rotation of the motor, and stops the motor to drive the push rod forward after reaching the determined preset time period of the reverse rotation of the motor. Controlling the motor in this way makes the push rod 142 retreat a preset distance.

S109: end.

The load detection unit 46 is not limited to the current detection circuit 56 and the pressure detection device 86 in the above embodiment, and can also detect whether the electric glue gun 100 is working under load according to the weight of the electric glue gun 100 when fully loaded and empty. As long as other load detection devices that can distinguish the different working conditions of the electric glue gun 100 between no-load and loaded are used to make the electric glue gun 100 retract or not retract under different working conditions, all fall within the protection scope of the present invention .

The above-mentioned load working time determining part (57, 77) can be a separate module, or can be built into the controller (51, 71), and use the comparator and timer in the controller (51, 71) or counters, without limitation.

Optionally, the electric glue gun 100 further includes a memory (not shown), and the memory may be built into the controller ( 41 , 51 , 81 ), or may be a separate memory chip. The memory at least stores the state of the electric glue gun 100 before power off, the state includes the working mode and the speed of the motor before the power off of the electric glue gun 100, and the working mode includes the jog mode and non-stop mode. Jog mode, non-jog mode includes constant speed mode and jog mode.

4 and FIG. 11 , as the control method of the fifth embodiment of the electric glue gun 100, the working mode and the motor speed before the power failure of the electric glue gun 100 are stored, and the working mode includes the Speed regulation mode and constant speed mode. The control method as the fifth embodiment of the electric glue gun 100 is as follows:

S110: start the electric glue gun;

Install the battery pack 10 to the electric glue gun 100, and press the trigger to start the electric glue gun 100, and the controller 41 is powered on.

S111: Identify the mode described in the electric glue gun;

As mentioned above, the mode of the electric glue gun 100 is detected by the mode detection part 45 , and the controller 41 identifies the mode of the electric glue gun according to the result of the mode detection part 45 .

S112: judging whether the electric glue gun 100 is in the jog mode;

The controller 41 determines whether the electric glue gun 100 is in the jog mode, if yes, then go to step S113, the electric glue gun 100 runs according to the jog mode until the end, otherwise go to step S114.

S113: the electric glue gun 100 operates in jog mode;

When it is judged that the electric glue gun 100 is in the jog mode, it continues to run in the original mode until the end, and does not control the motor to make the push rod retreat a preset distance.

S114: Obtain a load work event detection result;

The load detection part 46 detects the load operation event, and the load detection part 46 can be the above-mentioned current detection circuit 56 or the pressure detection device 86, and detects whether the electric glue gun 100 is loaded or occurs by detecting the current flowing to the motor or the pressure in the glue cartridge 15. Load job events.

S115: Determine whether a load work event occurs and whether the motor is in the state of stopping and driving the push rod forward;

The controller 41 judges whether the electric glue gun 100 is working under load or an event of working under load occurs according to the detection result of the load detection unit 46 .

At the same time, it is judged whether the motor 11 stops driving the push rod to advance. As an option, the trigger state is monitored in real time by the aforementioned trigger state detection device, and the controller 41 detects the trigger state of the device from the trigger state; as an option, the controller enters the braking state or Motor 11 is judged that motor 11 stops driving when withdrawing from drive push rod forward running state and natural shutdown. If it is determined that the electric glue gun 100 has a load working event and the motor 11 is in the state of stopping driving the push rod to advance, then go to step S; otherwise, go to step S101.

S116: Obtain the working hours of the load of the electric glue gun;

The above-mentioned load working time determination part 47 determines the load working time of the electric glue gun 100 according to the change of the parameter detected by the load detecting part 46. For the current detection circuit 56, the load working time determining part 47 determines according to the detected current change. Working time under load: For the pressure detection device 86 , the working time under load determination unit 47 determines the working time under load according to the detected pressure change in the rubber cartridge 15 .

In some specific embodiments, the load working duration determination unit 47 may specifically include a comparator and a timer or a counter.

S117: Determine the preset duration of motor reverse rotation;

The controller 41 determines the preset duration of the reverse rotation of the motor 11 through a formula or table look-up according to the acquired working duration of the load. The preset duration is positively correlated with the load working duration, that is, the longer the load working duration, the longer the preset duration for the motor 11 to reverse. In this way, the length of the reverse rotation of the motor 11 is dynamically adjusted, so that the retraction distance of the push rod 142 is positively correlated with the working time of the electric glue gun 100 under load, which can avoid the phenomenon of colloid overflow or the push rod 142 returning when the push rod 142 is insufficiently retracted. Too long retraction distance causes the push rod 142 or the glue gun to loosen, and the empty stroke that the push rod 142 walks in the next startup is too much, wasting time and energy.

S118: Control the motor to reverse for a preset time to make the push rod retreat a preset distance;

The controller 41 controls the reverse rotation of the motor 11 according to the determined preset time period of the reverse rotation of the motor, and stops the motor to drive the push rod forward after reaching the determined preset time period of the reverse rotation of the motor. Controlling the motor in this way makes the push rod 142 retreat a preset distance.

S119: storing the state of the electric glue gun;

Before the electric glue gun 100 is powered off, the state of the electric glue gun 100 is stored, the state includes the working mode and the motor speed, and the working mode includes jog mode, speed regulation mode and constant speed mode.

S120: end.

In the initial stage of starting the electric glue gun 100, the state before the power failure of the electric glue gun is read from the memory, and the electric glue gun 100 is controlled to run according to the state before the power failure, and then the electric glue gun is controlled according to the control methods of the above-mentioned various embodiments. Operation of gun 100. By setting the above-mentioned memory, the state before the power failure of the electric glue gun 100 can be recorded, so that when the electric glue gun 100 tool is powered off and restarted, the electric glue gun 100 can still run in the state before the power failure, so that for the same batch of work objects In other words, the motor 11 runs at the same optimal rotational speed after speed regulation, and the electric glue gun 100 can work at the same optimal output power, which can ensure a more consistent and better working effect, and can also prevent the electric glue gun 100 from breaking. It is troublesome to adjust the speed after power on.

The present invention also provides an electric glue gun, which includes: a housing; a motor supported by the housing; a bracket extending from the housing, and the bracket is used to support the rubber cartridge; a push-out mechanism , supported by the housing and connected to the motor, driven by the motor to extrude the gel in the rubber cartridge; the ejection mechanism includes a push rod, and the push rod can move along a first direction and a second direction; operation The switch is supported by the casing and can move in at least one direction, the operation switch can be operated, and at least includes an operation state that makes the motor stop driving the push rod to advance; the detection part is operable to detect the motor The load working event of the glue gun; the controller is connected with the motor and the operation switch, and the controller is configured to: judge whether the electric glue is glued according to the detection result of the detection part and the operation state of the operation switch. Whether the gun is in the first stop mode or the second stop mode; when the electric glue gun is in the first stop mode, control the motor to make the push rod retreat a preset distance; when the electric glue gun is in the first stop mode 2. During the shutdown mode, the motor is controlled so that the push rod does not retreat.

Further, when the detection part detects a load working event and the operation switch is in the operation state of causing the motor to stop driving the push rod forward, the controller judges that the electric glue gun is in the first stop Mode; when the detection part does not detect a load work event and when the operation switch is in the operation state that makes the motor stop driving the push rod to advance, the controller judges that the electric glue gun is in the second stop model. The detection unit is implemented according to the detection unit in the above-mentioned embodiment.

It should be noted that in the present invention, the electric glue gun 100 may not include the above-mentioned operation switch located on the electric glue gun 100, that is to say, the signal to stop the motor from driving forward is not limited to input from an external user, but may also come from the electric glue gun 100 internal electrical signal, for example, after the controller 41 detects that a certain parameter changes or reaches a critical value, it needs to stop the gluing work. For example, when the electric glue gun 100 detects that the temperature of the battery pack is too high or the battery pack is under voltage, the controller 41 stops outputting the signal to make the motor run, and the motor stops driving the push rod to move forward.

To sum up, the above-mentioned electric glue gun 100 has at least the following beneficial effects:

When the electric glue gun detects that the trigger is released, it controls the motor to reverse for a preset period of time, so that the push rod can retreat a certain distance to prevent the glue from continuing to flow out or seep out of the nozzle of the glue gun after the trigger is released and the glue is stopped, causing Colloid waste and nozzle dirt, the electric glue gun of the present invention can effectively prevent the colloid from overflowing after the trigger is released;

By detecting whether the electric glue gun has a load working event (that is, whether the glue is being applied), the push rod is retracted by a certain distance when the load working event is detected so that the glue will not overflow, and when the glue is not detected When gluing, the push rod will not retreat, reducing unnecessary operations, and saving energy while being easy to operate;

Adjust the retracting distance of the push rod according to the gluing time, so that the retracting distance of the push rod is positively related to the gluing time, so as to avoid the retraction according to the fixed distance when the gluing time is different, which may lead to insufficient retracting distance. Glue dripping occurs, or the glue gun is loosened due to too long retraction distance, and the push rod will take too much empty travel when it is turned on next time, wasting time and energy;

By setting the governor, the output of different powers of the electric glue gun can be realized, so as to meet the needs of different working conditions; at the same time, by setting the control mechanism of the upper limit of the output power, it can be set with multiple gears, which can realize the electric glue gun in multiple The variable speed adjustment under the gears, and the upper limit of the output power is set for each gear, and the motor has different maximum speeds under the multiple gears, so as to avoid the unexpected excessive output power caused by the user pulling the trigger too much and motor speed, which is convenient for users to operate and has good safety; at the same time, the setting of multiple gears corresponds to different speed regulation ranges, so that users can choose different speed regulation ranges according to different needs, which is convenient for operation;

By setting the speed regulation mode, constant speed mode and jog mode, different needs of users can be met. In the speed regulation mode, the motor speed is determined according to the pulling amount of the trigger, which is convenient for users to use; in the constant speed mode, the motor can maintain a fixed speed in one gear, so that the user can avoid the difficulty and inconvenience of pressing the trigger all the time. And the shaking of the user's hand may cause the speed to be unstable, so that the glue output part is even, which affects the work quality; in the jog mode, the motor outputs the speed at a preset interval, and the electric glue gun emits glue at a preset interval, which can Avoiding glue out all the time and reducing unnecessary waste;

By setting the memory with power-off storage function, the state of the electric glue gun before power-off can be recorded, so that when the electric glue gun tool is powered off and restarted, the electric glue gun can still run in the state before power-off, so for the same For batch work objects, the motor can run at the same speed, which can ensure the consistency and better working effect of the electric glue gun, and can also avoid the trouble of adjusting the speed after the electric glue gun is powered off.

However, there are still some defects in the existing electric glue guns. After the user releases the trigger to stop the glue application: the rubber skin for containing the glue is wrinkled due to being squeezed, and it may be stuck on the top 142a of the push rod 142, The user needs to use force to pull the rubber out and replace it.

In addition, some existing electric glue guns have a locking mechanism 144 ( FIG. 3 ). The locking mechanism 144 is used to prevent the push rod 142 from moving forward when the push rod 142 reaches a limited position, so as to prevent the push rod 142 from moving too far forward. As a result, the colloid seeps out of the nozzle and contaminates the nozzle; moreover, if the push rod 142 exceeds the limited position, the locking structure will be stuck, which is inconvenient for the unlocking operation. When the locking mechanism 144 does not exceed a defined position, it can be conveniently operated and unlocked so that the push rod 142 can move forward.

Referring to FIG. 12 , in order to solve the above problems, the present invention also provides an electric glue gun, which includes: a controller 210 , a power supply circuit 220 , and a driving circuit 230 . The controller 210 is configured to control the motor 11 to retreat the push rod 142 by a preset distance after the push rod 142 reaches a predetermined position.

In order to achieve the above purpose, the electric glue gun 200 also includes a position detection part 280, and the position detection part 280 is used to detect whether the push rod 142 reaches the limited position; the controller 210 is configured to control the The motor 11 retracts the push rod 142 by a preset distance. In this embodiment, the limited position is the maximum stroke position that the push rod 142 can reach, which can be limited by setting the structure, or can be fed back to the controller through electronic components and other electrical signals so that the push rod cannot continue to move forward. forward. As an option, when the push rod 142 reaches the maximum stroke position, the push rod 142 is locked by the locking mechanism 144 .

The position detection part 280 is configured to output a signal to the controller after detecting that the push rod reaches a limited position, and the signal is used to make the controller control the motor so that the push rod retracts for a predetermined time. Set distance. The signal may be an electrical signal, such as a signal output by a sensor, or a mechanical signal, such as a touch action of a mechanical structure.

The position detection part 280 can be electronically detected when the push rod reaches a limited position and output an electric signal to the controller 210 to reverse the motor 11 so that the push rod 142 retreats a preset distance, or When 142 reaches the limited position, the motor 11 is reversed to drive the push rod 142 to retreat a preset distance through a mechanical action trigger.

In some specific implementations, the position detection unit 280 includes a magnetic sensor 281 and a magnetic element 282, and the magnetic sensor 281 may be, but not limited to, a Hall sensor. One of the magnetic sensor 281 and the magnetic element 282 is directly or indirectly arranged on the casing 12, which is fixedly arranged relative to the casing 12, and the other of the magnetic sensor 281 and the magnetic element 282 is arranged on the push rod 142, which can Follow the push rod 142 movement. As a specific solution, the magnetic sensor 281 is configured to be fixed relative to the housing 12 , and the magnetic element is disposed on the push rod 142 . When the push rod 142 reaches the limited position, the magnetic sensor 281 can sense the magnetic field of the magnetic element 282, and output a signal to the controller 210. After the controller 210 obtains the signal, it controls the motor 11 to reverse to make the push rod 142 return. Back off the preset distance.

In some specific implementations, the position detection unit 280 may also include a proximity switch, a limit switch, a photoelectric sensor, etc., as long as it can detect that the push rod 142 reaches a limited position and can output a mechanical signal or an electrical signal after reaching the limited position, Feedback to the controller 210 or the control circuit (for example, a motor commutation circuit) in the form of a mechanical signal or an electrical signal is enough to reverse the motor 11, and the mechanical or electrical signal is used to reverse the motor to drive the push rod 121 back Back off the preset distance. The mechanical signal can also be fed back to the control circuit (eg, motor commutation circuit) after mechanical-electrical signal conversion.

As an option, the preset distance for the retraction of the push rod is positively correlated with the rotation speed of the motor.

As an option, the electric glue gun has multiple gears, the motor 11 has different maximum speeds in the multiple gears, and the preset distance of the push rod 142 retreating in different gears is different. same.

As an option, if the gear of the electric glue gun is higher, the maximum rotational speed of the motor 11 is higher, and the higher the gear, the greater the preset distance for the push rod 142 to retreat.

The present invention also provides a control method for the above-mentioned electric glue gun. Referring to FIG. 13 , as an embodiment, the control method for the motor is performed in the following steps:

S131: start the electric glue gun;

Install the battery pack 10 to the electric glue gun, and press the trigger 16 to start the electric glue gun, and the controller 210 is powered on.

S132: Obtain the position of the push rod;

The position detection unit 280 detects the position of the push rod 142 in real time, and outputs a signal to the controller 210 when the position of the push rod 142 is detected, so that the controller 210 can acquire the position of the push rod 142 .

S133: judging whether the push rod reaches the limit position;

The controller 210 determines whether the push rod 142 has reached the limited position according to the signal from the position detection unit 280 .

As an implementation manner, the position detecting part includes a magnetic sensor 281 and a magnetic element 282 , and after the controller 210 receives the magnetic sensor 281 , it is judged that the push rod 142 has reached a limited position.

S134: Control the motor to make the push rod retreat a preset distance;

After the controller 210 judges that the push rod 142 has reached the limited position, it outputs a control signal to the motor to control the motor 11 to reverse and drive the push rod 142 to retreat a preset distance.

In other embodiments, the signal from the position detection unit 280 is fed back to the control circuit (for example, a motor commutation circuit), and after receiving the signal, the control circuit controls the motor 11 to reverse and drive the push rod 142 to retreat a preset distance.

S135: end.

As an option, the electric glue gun 200 also includes: a current switch 240, a mode detection part 250, a load detection part 260, a load working time determination unit 270, and the above-mentioned motor 11, trigger 16, governor 17, shifting switch 19, Mode switching switch 20, memory (not shown). The above circuit components are the same as or similar to those of the aforementioned embodiments, and will not be repeated here.

Referring to Fig. 14, the control method of the motor as an embodiment is performed in the following steps:

S140: start the electric glue gun;

Install the battery pack 10 to the electric glue gun, and press the trigger 16 to start the electric glue gun, and the controller 210 is powered on.

S141: Identify the mode described in the electric glue gun;

As mentioned above, the mode of the electric glue gun is detected by the mode detection part 250 , and the controller 210 identifies the mode of the electric glue gun according to the result of the mode detection part 250 .

S142: judging whether the electric glue gun is in jog mode;

The controller 210 judges whether the electric glue gun is in the jog mode, if yes, then go to step S143, the electric glue gun runs according to the jog mode until the end, if not, go to step S144.

S143: The electric glue gun operates in jog mode;

When it is judged that the electric glue gun is in jog mode, continue to run in the original mode until the end, and do not control the motor to make the push rod retreat a preset distance.

S144: Obtain a load work event detection result;

The load detection part 260 detects the load operation event, and the load detection part 260 can be the above-mentioned current detection circuit 56 or the pressure detection device 86, and detects whether the electric glue gun is loaded or occurs by detecting the current flowing to the motor 11 or the pressure in the glue cartridge 15. Load job events.

S115: Determine whether a load work event occurs and whether the motor is in the state of stopping and driving the push rod forward;

The controller 210 judges whether the electric glue gun is working under load or an event of working under load occurs according to the detection result of the load detection part 260 .

At the same time, it is judged whether the motor 11 stops driving the push rod to advance. As an option, the trigger state is monitored in real time by the aforementioned trigger state detection device, and the controller 210 detects the trigger state of the device from the trigger state; Normal running state and judge motor 11 to stop driving push rod to advance when shutting down naturally.

If it is determined that the electric glue gun has a load working event and the motor 11 is in the state of stopping driving the push rod to advance, then go to step S146; otherwise, go to step S144.

S146: Obtain the working hours of the load of the electric glue gun;

The load working time determination part 270 determines the load working time of the electric glue gun according to the change of the parameter detected by the load detecting part 260. If the load detecting part 260 adopts the current detection circuit 56, the load working time determining part 270 determines according to the detected current change. Determine the working duration of the load; if the load detection unit 260 uses the pressure detection device 86 , the working duration determination unit 270 determines the working duration of the load according to the detected pressure change in the rubber cartridge 15 .

In some specific embodiments, the load working duration determination unit 270 may specifically include a comparator and a timer or a counter.

S147: Determine the preset duration of motor reverse rotation;

The controller 210 determines the preset duration of the reverse rotation of the motor 11 through a formula or a look-up table according to the acquired working duration of the load. The preset duration is positively correlated with the load working duration, that is, the longer the load working duration, the longer the preset duration for the motor 11 to reverse. In this way, the length of the reverse rotation of the motor 11 is dynamically adjusted, so that the retraction distance of the push rod 142 is positively correlated with the working time of the electric glue gun load, which can avoid the glue overflow phenomenon or the retraction of the push rod 142 when the push rod 142 is insufficiently retracted. If the distance is too long, the push rod 142 or the glue gun will become loose, and the empty travel of the push rod 142 will be too much when the next startup is started, which will waste time and energy.

S148: Control the motor to reverse for a preset time to make the push rod retreat a preset distance;

The controller 210 controls the motor 11 to reverse according to the determined preset period of reverse rotation of the motor, and stops the motor after reaching the determined preset period of reverse rotation of the motor, so that the push rod 142 retreats a preset distance. Controlling the motor in this way makes the push rod 142 retreat a preset distance.

S149: storing the state of the electric glue gun;

Before the electric glue gun 100 is powered off, the state of the electric glue gun is stored, the state includes the working mode and the motor speed, and the working mode includes jog mode, speed regulation mode and constant speed mode. Turn to step S150 after step S149 is executed.

In the initial stage of starting the electric glue gun, read the state of the electric glue gun before power off from the memory, and control the electric glue gun to run according to the state before power off. By setting the above memory, the state of the electric glue gun before the power failure can be recorded, so that when the electric glue gun is restarted after the power failure, the electric glue gun can still run in the state before the power failure, so that for the same batch of work objects, the motor 11 Run at the same speed after the speed adjustment, the electric glue gun can work at the same output power, which can ensure a more consistent and better working effect, and can also avoid the speed adjustment after the electric glue gun is powered off trouble.

S150: end.

The electric glue gun is powered off and shut down.

S151: Obtain the position of the push rod;

The position detection unit 280 detects the position of the push rod 142 in real time, and outputs a signal to the controller 210 when the position of the push rod 142 is detected, so that the controller 210 can acquire the position of the push rod 142 .

S152: judging whether the push rod reaches the limit position;

The controller 210 determines whether the push rod 142 has reached the limited position according to the signal from the position detection unit 280 .

As an implementation manner, the position detecting part includes a magnetic sensor 281 and a magnetic element 282 , and after the controller 210 receives the magnetic sensor 281 , it is judged that the push rod 142 has reached a limited position.

S153: Control the motor to make the push rod retreat a preset distance;

After the controller 210 judges that the push rod 142 has reached the limited position, it outputs a control signal to the motor to control the motor 11 to reverse and drive the push rod 142 to retreat a preset distance.

In other embodiments, the signal from the position detection unit 280 is fed back to the control circuit (for example, a motor commutation circuit), and after receiving the signal, the control circuit controls the motor 11 to reverse and drive the push rod 142 to retreat a preset distance. After step S153 is executed, go to step S150.

In actual operation, the preset time period of the reverse rotation of the motor can be used to correspond to the preset distance of the retraction of the push rod 142 , and the preset time length of the motor reverse rotation can be stored in the memory in advance by the user. As an option, the preset duration of the reverse rotation of the motor is positively correlated with the rotational speed of the motor. As an option, the preset duration of the reverse rotation of the motor is positively correlated with the gear position of the shift switch. The higher the gear position, the higher the maximum speed of the motor correspondingly, and the longer the preset duration of the motor reverse rotation.

The advantage of this is: first of all, after the motor stops driving the push rod to advance or the user releases the trigger 16 or after the push rod reaches the limited position, the motor is controlled to make the push rod 142 retreat to release the pressure, which can prevent the glue from continuing to overflow, causing unnecessary Secondly, different gears correspond to different speeds of the push rod 142, and the push rod 142 needs to retreat different distances to release different pressures, so as to ensure that the pressure under different gears can be fully released by retreating different distances.

For an electric glue gun that uses a screw as a push rod to extrude the glue, if the push rod 142 is not retracted after the push rod 142 reaches a limited position, on the one hand the top 142a on the front end of the push rod 142 can be easily pushed into the rubber cartridge. On the other hand, if the push rod 142 continues to advance after reaching the limited position, the rear end relative to the front end of the push rod 142 will also be blocked by the locking mechanism 144. live, causing the user to be unable to unlock. Simultaneously, controlling the electric glue gun to move backward after the detection reaches the limited position is more conducive to the user to disengage the plug 142a on the front end of the push rod 142 from the glue that is about to be used up, so that the user can replace the glue.

However, using the above method, there will be a problem when the electric glue gun 100 is used again. The push rod 142 must first overcome the retracted distance after the last use before it can be glued normally. Especially when the low-speed gear is running, the user needs to wait It takes a while to work, a waste of time.

In order to solve the above-mentioned problems, another aspect of the present invention provides an electric glue gun and a start-up control method thereof, which can effectively avoid the above-mentioned problems.

Referring to FIG. 15 , in this embodiment, the controller 310 is configured as follows: when the electric glue gun 100 starts up again, the controller 310 connects electric energy, controls the electric glue gun 100 to enter the acceleration mode, and makes the push rod 142 accelerate forward to overcome the motor After the push rod 142 has overcome the preset distance of retreat, the electric glue gun 100 is controlled to switch to the working mode and rotation speed set by the user. Specifically, the current switch 340 is turned on, the power circuit 320 is powered on, and the controller 310 obtains electric energy from the power circuit 320 to control the motor 11 to work. In other embodiments, when the trigger 16 is pressed to the first position, the current switch 340 is turned on, and the controller 310 receives electric energy to control the motor.

As an option, the electric glue gun 100 includes a memory 350, and the data stored in the memory 350 will not be lost after power off. The memory 350 may be a separate memory chip, or may be built in the controller 310 . The memory 350 at least stores the state of the electric glue gun 100 when it was used last time, the state at least includes the working mode before the motor stops driving the push rod forward and the preset distance for the push rod 142 to retreat, and the working mode includes the speed regulation mode , constant speed mode, jog mode. Through the provided memory 350 with a power-off storage function, the state of the electric glue gun 100 when it was used last time can be recorded, so that when the electric glue gun 100 is started again, it accelerates forward to overcome the preset distance that the push rod 142 retreats. It can be understood that the state of the electric glue gun 100 when it was used last time may also include the rotational speed of the motor of the electric glue gun 100 and the duration of the reverse rotation of the motor, etc., and there is no limitation here.

Specifically, after the electric glue gun 100 is powered on, the controller 310 is configured to read from the memory the working mode before the motor of the electric glue gun 100 stops driving the push rod and the distance that the push rod 142 retreats. If it is in jog mode, then The electric glue gun 100 directly enters the working mode set by the user; if it is a non-jog mode, such as a constant speed mode or a speed regulation mode, the controller 310 controls the electric glue gun 100 to enter the acceleration mode, so that the motor accelerates to push The rod 142 moves forward, and when the push rod 142 overcomes the preset backward distance, the controller 310 controls the electric glue gun 100 to switch to the working mode and speed set by the user.

As an option, the electric glue gun 100 further includes a stroke measuring part 66 for detecting the distance of the push rod 142 advancing or retreating, and the stroke measuring part 66 is electrically connected to the memory 350 . Specifically, the stroke measuring part 66 can be a displacement sensor, which is arranged at the front end of the push rod 142, can measure the distance of the push rod 142 retracted, and sends the retracted distance signal to the memory 350, and the memory 350 stores the retracted distance in the memory 350. Middle; when the electric glue gun is started again, the controller 310 controls the motor 11 to accelerate and push the push rod 142 forward, and when the displacement sensor detects that the push rod 142 has overcome the preset distance of retraction, it sends a forward distance signal to the controller 310, The controller 310 controls the electric glue gun 100 to switch to the working mode and rotating speed set by the user. As an implementation manner, the stroke measuring unit 66 may be a revolution counter, which is used to detect the number of revolutions of the motor. Every time the motor rotates one circle, the push rod advances a certain distance, so the number of turns of the motor rotor can reflect the distance that the push rod 142 retreats, and store it in the memory 350; when the glue gun is started again, the controller 310 controls The motor 11 accelerates and pushes the push rod forward, and the number of turns counter detects the number of rotations of the motor rotor and sends it to the controller 310. When the controller 310 detects that the motor has overcome the number of reverse rotations, that is, the push rod 142 has overcome the retreat. After the preset distance, the controller 310 controls the electric glue gun 100 to switch to the working mode and rotating speed set by the user.

As an implementation manner, the stroke measurement unit 66 may also be a timing unit, which is used to determine the time for the motor to reverse, and the timing unit is electrically connected to the memory 350 . Specifically, the timing unit records the reversing time of the electric glue gun 100 and sends it to the controller 41 . The controller 41 is configured to calculate the retraction distance of the push rod 142 according to the time of the reverse rotation of the motor and the rotation speed of the reverse rotation. When the electric glue gun is started again, the controller 310 controls the electric glue gun 100 to enter the acceleration mode, so that the motor 11 is accelerated to push the push rod 142 forward, and the controller 310 is also configured to calculate the push rod according to the current speed of the motor and the forward time. 141 forward distance, when the distance that the push rod advances is equal to the distance that the push rod retreats before the power failure, the controller 41 controls the electric glue gun 100 to switch to the working mode and speed set by the user.

Optionally, the electric glue gun 100 is further provided with a load detection part for detecting a load operation event of the electric glue gun 100 , and an output end of the load detection part is electrically connected to the controller 310 . Specifically, after the electric glue gun 100 is powered on, the controller 310 controls the motor 11 to accelerate and push the push rod forward, and the controller 310 judges whether the electric glue gun 100 has a load operation event according to the detection result of the load detection part. After a load work event occurs, the control motor switches to the work mode and speed set by the user.

As an implementation manner, the load detection unit may be a current detection circuit, which detects whether the electric glue gun 100 is working under load by detecting the current flowing to the motor 11 . Specifically, the current detection circuit is electrically connected to the main circuit for detecting the current flowing to the winding of the motor 11 . When the push rod 142 pushes the colloid to move, the push rod 142 will be subjected to the reaction force of the colloid, the load of the motor 11 will be larger than that of no-load, and the current at this time will also be larger than that of no-load, so it can be detected by detecting the flow to the motor. 11 to detect whether the electric glue gun 100 has a load working event. The output terminal of the current detection circuit is electrically connected to the controller 41 , and the controller 310 judges whether the electric glue gun 100 has a load working event according to the detection result of the current detection circuit. After the electric glue gun 100 is powered on, the controller 310 controls the motor to accelerate and push the push rod 142 forward, and after judging that the electric glue gun 100 has a load working event, the controller 310 controls the motor to switch to the working mode and speed set by the user Work.

Specifically, the controller 310 compares the current value detected by the current detection circuit with the preset current threshold value, the preset current threshold value corresponds to the inflection point of the current change, that is, the current when the load occurs, if the current detection value If it is greater than the preset current threshold, it is determined that the electric glue gun 100 has a load working event; otherwise, it is judged that the electric glue gun 100 has not occurred a load working event.

As an implementation manner, the load detection part may be a micro switch, and the load detection part is arranged at the front end of the push rod 142 , and the controller 310 judges whether a load operation event occurs in the electric glue gun 100 according to the output signal of the micro switch. It can be understood that the micro switch can also be a pressure sensor,

The electric glue gun 100 retreats a certain preset distance after the motor stops to drive the push rod forward, and then accelerates to overcome the preset distance when it is started again. In this way, it can prevent the glue from overflowing after use, causing unnecessary waste and pollution; it can save waiting time when reusing and is easy to operate.

Referring to FIG. 16 , the control method for starting the electric glue gun 100 as an embodiment is performed in the following steps:

S161: Start the electric glue gun;

Install the battery pack 10 to the electric glue gun 100, and press the trigger to start the electric glue gun 100, and the controller 310 is powered on.

S162: Read the working mode of the electric glue gun when it was used last time;

The controller 310 reads the working mode of the electric glue gun in the memory 350 when it was used last time.

S163: Determine whether the electric glue gun is in jog mode before the motor stops driving the push rod;

The controller 310 judges whether the electric glue gun 100 is in jog mode before the motor stops driving the push rod forward; if yes, then go to step S166, and the electric glue gun works according to the set working mode; if not, then go to step S164.

S164: Read the preset distance for the push rod of the electric glue gun to retreat;

In some implementations, the controller 310 directly reads the backward distance of the push rod 142 in the memory 350; The rotating speed of revolution calculates the preset distance that push rod 142 retreats.

S165: Control the electric glue gun to enter the acceleration mode;

The controller 310 controls the electric glue gun 100 to enter the acceleration mode according to the predetermined backward distance of the push rod 142, so that the motor accelerates and pushes the push rod 142 forward. After the electric glue gun 100 has a load working event, it exits the acceleration mode.

S166: Control the electric glue gun to switch to the mode set by the user;

The controller 310 controls the electric glue gun 100 to enter into the working mode set by the user and work at a rotating speed. The working modes include inching mode, speed regulating mode and constant speed mode.

It can be understood that, in the above steps, step S163 can be omitted, and the controller 310 reads the distance that the push rod 142 retreated after the electric glue gun was used last time. If the push rod 142 retreats, step S165 is executed; if the push rod 142 does not Backward, execute step S166.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the above-mentioned embodiments do not limit the present invention in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (10)

1. An electric glue gun, comprising: case; a motor supported by the housing; An operation switch that can be operated at least to start the motor; the operation switch is supported by the housing and can move in at least one direction, so that the motor can output different speeds; a bracket extending from the housing, and the bracket is used to support the rubber cartridge; The push-out mechanism is supported by the housing and connected to the motor, the push-out mechanism includes a push rod, and the motor can drive the push-out mechanism so that the push rod can squeeze out the glue in the rubber cartridge; a controller for controlling the motor; The load detection part includes a current detection circuit, which is used to determine whether the electric glue gun is under load by detecting the current flowing to the motor; The controller is configured to: after the electric glue gun has a load working event and the motor stops driving the push rod forward, it can control the motor to make the push rod retreat a preset distance; The electric glue gun includes a shifting switch, the shifting switch has multiple gears, the motor has different maximum speeds in the multiple gears, and the push rod retracts under the multiple gears. The preset distances are different; When the glue gun is started again, the controller can control the electric glue gun to enter the acceleration mode to accelerate the push rod forward; After the push rod overcomes the retraction preset distance or a load working event occurs, the controller can control the electric glue gun to switch from the acceleration mode to a user-set working mode and rotating speed. 2. The electric glue gun according to claim 1, characterized in that: The working modes of the electric glue gun include inching mode and non-inching mode. 3. The electric glue gun according to claim 2, characterized in that: The electric glue gun also includes a mode detection part for detecting whether the electric glue gun is in the inching mode or in the non-inching mode; the mode detection part is electrically connected with the controller. 4. The electric glue gun according to claim 3, characterized in that: The mode detection part includes a timing unit, and the timing unit is used to determine the normal running time of the motor; the controller is configured to judge whether the electric glue gun is in the jog mode or the non-dot mode according to the normal running time of the motor dynamic mode; The controller is configured to determine that the electric glue gun is in the non-jog mode when the normal running time of the motor is greater than or equal to a preset time. 5. The electric glue gun according to claim 1, characterized in that: The electric glue gun includes a position detection part, the position detection part is used to detect whether the push rod reaches a limited position, and the position detection part is configured to output a signal to The controller; the controller is configured to control the motor to retreat the push rod by a preset distance after the push rod reaches a defined position. 6. The electric glue gun according to claim 5, characterized in that: The position detection part includes a magnetic sensor and a magnetic element, one of the magnetic sensor and the magnetic element is fixedly arranged relative to the housing, and the other of the magnetic sensor and the magnetic element is arranged on the push rod; When the push rod reaches the limited position, the magnetic sensor can sense the magnetic field of the magnetic element and output a signal to the controller. 7. The electric glue gun according to claim 4, characterized in that: The normal running time of the motor is: the running time of the motor at a constant speed or the running time of the motor from zero speed to before braking. 8. The electric glue gun according to claim 1, characterized in that: The electric glue gun also includes a locking mechanism, which is used to prevent the push rod from moving forward when the push rod reaches a limited position; the locking mechanism can be operatively unlocked so that all The push rod can move forward. 9. The electric glue gun according to claim 2, characterized in that: The electric glue gun also includes: a memory for storing the state of the electric glue gun when it was used last time; The states include at least a working mode before the motor stops driving the push rod forward and a preset distance for the push rod to retreat. 10. The electric glue gun according to claim 2, characterized in that: When the electric glue gun was in jog mode when it was used last time, the controller controls the electric glue gun to work according to the working mode and rotation speed set by the user.