CN107217632A - A kind of blower of safe operation - Google Patents

Abstract

The invention discloses a blower and suction machine with safe operation, which belongs to the field of electric garden tools and includes a casing, which is detachably connected with a first working head and a second working head, the first working head includes a blowpipe or a grass collecting bag, The second working head includes a suction pipe or a protective cover. A start switch is arranged in the casing, and a connecting rod is installed on the casing. The connecting rod is slidably matched with the casing and can rotate relative to the casing. A first trigger protrusion against one end of the connecting rod, a second trigger protrusion against the other end of the connecting rod is provided on the second working head; one of the first trigger protrusion and the second trigger protrusion When the connecting rod is in contact with the connecting rod, the connecting rod rotates relative to the housing; when both the first trigger protrusion and the second trigger protrusion are in contact with the connecting rod at the same time, the connecting rod is pushed and rotates relative to the housing. Move to trigger the start switch. The advantage of the present invention is that it makes the user safer when switching between different working modes.

Description

A Blower with Safe Operation

【Technical field】

The invention relates to a blower and suction machine with safe operation, which belongs to the field of garden electric tools.

【Background technique】

Electric tools with two functions of blowing and suction are widely used in daily life, and users may switch between the two functions when using the electric tool. For example, a blower in the field of garden tools is mainly used for cleaning and collecting fallen leaves, so it is also called a leaf blower.

Generally, the blower has two modes. When the blower is in the blowing mode, the high-speed airflow blown from the blowing pipe will blow and gather the leaves scattered on the ground; The air suction air sucks the ground leaves and dust into the collecting device to complete the cleaning of the ground leaves.

There are also certain problems in the use of this kind of blowing machine. When the blowing and suction functions are switched, the suction pipe is usually removed and the blowing pipe is installed, or the blowing pipe is removed and the suction pipe is installed. However, some users who are not familiar with the operation may Unprofessional operation and replacement behaviors cause the machine to be replaced without completely stopping, and it is very easy for the machine to injure people.

【Content of invention】

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a blower with safe operation, so that it is safer for users to switch between different working modes of the blower.

To solve the above technical problems, the present invention adopts the following technical solutions:

A blower with safe operation, comprising a casing, the casing is detachably connected with a first working head and a second working head, the first working head includes a blowing pipe or a grass bag, and the second working head includes a suction pipe or a protective A start switch is provided in the casing, a connecting rod is installed on the casing, and a rotating end is provided between the two ends of the connecting rod, and the rotating end is slidably matched with the casing and can be connected with the casing. Relatively rotated, the first working head is provided with a first trigger protrusion that abuts against one end of the connecting rod in an assembled state, and the second working head is provided with a second trigger protrusion that abuts against the other end of the connecting rod in an assembled state. Trigger bump;

When one of the first trigger protrusion and the second trigger protrusion is in contact with the connecting rod, the connecting rod is opposite

Rotate on the casing;

When both the first trigger protrusion and the second trigger protrusion abut against the connecting rod at the same time, the connecting rod is pushed

actuate and move relative to the casing to trigger the start switch.

Adopt beneficial effect of the present invention:

In the present invention, a safety operating device is provided on the casing, and the safety operating device includes a connecting rod. It is located between the two ends of the connecting rod. The two ends of the connecting rod are free ends, that is, when one of the two ends of the connecting rod is stressed, the connecting rod will rotate around the rotating end, and when the two ends of the connecting rod When both ends are stressed at the same time, a force will be generated to push the connecting rod to move, so that the moving effect of the connecting rod will occur. That is to say, when the force is applied to both ends of the connecting rod and one of the ends is stressed, the movement effect of the connecting rod is different. Of course, using this difference, the first working head is provided with a first trigger protrusion that abuts against one end of the connecting rod in the assembled state, and the second working head is provided with a trigger protrusion that is in contact with the connecting rod in the assembled state. the second trigger protrusion with the other end against;

When one of the first trigger protrusion and the second trigger protrusion abuts against one end of the connecting rod, that is, only one end of the connecting rod exerts a force, the connecting rod is only rotated, and there may be a slight movement, but can be omitted;

And when the first trigger protrusion and the second trigger protrusion are against the two ends of the connecting rod at the same time, the connecting rod at this time is stressed at both ends, so it will be pushed to move. When the connecting rod moves, it can rely on physical force. Contacting the start switch can also use trigger signals such as a photoelectric sensor or a displacement sensor to turn on the start switch.

Utilizing this effect, when one of the first working head and the second working head is disassembled, the start switch is in the off state, so when the user disassembles one of them, the blower will not operate, only when The first working head and the second working head are assembled on the casing at the same time, and the blowing and suction machine will work, which ensures that the motor in the blowing and suction machine will not hurt the user during the switching process of the blowing mode and the suction mode. , better security.

As a preference, a chute is provided on the casing, a rotating shaft is provided on the connecting rod, and the rotating shaft is accommodated in the chute; or, a rotating shaft is provided on the casing, and a rotating shaft is arranged on the connecting rod A sliding slot is provided, and the rotating shaft is accommodated in the sliding slot.

Preferably, the connecting rod is located below the start switch.

Preferably, an elastic reset member is provided between the start switch and the connecting rod.

Preferably, the casing is provided with a first through hole into which the first trigger protrusion is inserted; and/or, the casing is provided with a second through hole into which the second trigger protrusion is inserted.

Preferably, the connecting rod is provided with a first positioning groove for positioning the first trigger protrusion; and/or, the connecting rod is provided with a second positioning groove for positioning the second trigger protrusion .

Preferably, the start switch is a micro switch, and when both the first trigger protrusion and the second trigger protrusion abut against the connecting rod at the same time, the connecting rod moves toward the start switch and contacts the start switch.

Preferably, a photoelectric sensor is provided in the casing, the photoelectric sensor is connected to the start switch, and the photoelectric sensor is triggered when the connecting rod moves.

Preferably, the casing is provided with a limiting rib for limiting the rotation range of the connecting rod.

As a preference, the first working head and the second working head are snapped together with the casing, and the casing is provided with a first button for unlocking the first working head and a second button for unlocking the second working head. button.

Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

【Description of drawings】

Below in conjunction with accompanying drawing, the present invention will be further described:

Fig. 1 is a schematic diagram of the state in blowing mode in Embodiment 1 of the blowing machine of the present invention;

Fig. 2 is a schematic diagram of the state in the suction mode of the first embodiment of the blowing machine of the present invention;

Fig. 3 is the enlarged schematic view of the connecting rod in the first embodiment of the blowing machine of the present invention;

4 is a three-dimensional schematic diagram of the connecting rod, the first trigger protrusion, and the second trigger protrusion in Embodiment 1 of the blowing machine of the present invention;

Fig. 5 is the schematic diagram when simultaneously assembling blowpipe and protective cover in blowing machine embodiment one of the present invention;

Fig. 6 is a schematic diagram when the protective cover is assembled and the blowpipe is removed in the first embodiment of the blower of the present invention;

Fig. 7 is the schematic diagram when the suction pipe device and the grass collecting bag are assembled in the first embodiment of the suction machine of the present invention;

Fig. 8 is a schematic diagram when the grass collecting bag is assembled and the suction pipe is removed in the first embodiment of the blowing and aspirating machine of the present invention.

【detailed description】

The technical solutions of the embodiments of the present invention will be explained and described below in conjunction with the accompanying drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the examples in the implementation manners, other examples obtained by those skilled in the art without making creative efforts all belong to the protection scope of the present invention.

In the following description, terms such as "inner", "outer", "upper", "lower", "left", "right", etc. that indicate orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, It is only for the convenience of describing the embodiment and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Example 1:

As shown in Fig. 1 to Fig. 8, the present embodiment is a kind of blowing and sucking machine, and blowing and sucking machine comprises casing 1, and casing 1 is provided with air inlet 102 and air outlet 102, and blowing and sucking machine has two working modes, That is, the blowing mode and the suction mode, as shown in Figure 1 is the blowing mode, under this mode, the air outlet 102 on the casing 1 is installed with a blowpipe 21, the air inlet 102 is equipped with a protective cover 32, and the blowpipe 21 is used for air outlet , the protective cover 32 is for safety considerations to prevent the user's hands or sundries from entering the casing 1, the suction mode is shown in Figure 2, and in the suction mode, the grass bag 22 is installed on the air outlet 102 of the casing 1 The suction pipe 31 is installed at the air inlet 102. The switching of the two working modes is mainly realized by replacing the working head, that is, the blowpipe 21 and the grass bag 22 are both the first working head 2, the suction pipe 31 and the protective cover 32 are both the second working head 3, and the first working head 2 and the second working head 3 are detachably connected with the casing 1.

During the switching process of the two working modes, such as switching from blowing mode to suction mode, usually the blowpipe 21 is removed from the air outlet 102, the grass bag 22 is installed, and the protective cover 32 is removed from the air inlet 102. , load onto suction pipe 31, if switch to blowing mode from suction mode, then vice versa. Obviously, under this switching mode, one of the working heads needs to be removed. During the removal process, the motor 41 and fan 42 in the casing 1 will be exposed without any protection. In operation, if the user accidentally touches it, the consequences will be disastrous. For this purpose, a safety operation device is provided in this embodiment.

The safety operation device includes a connecting rod 5, which is rotatably installed on the casing 1, and at the rotating position, that is, the rotating end can move relative to the casing 1, and the rotating end is located between the two ends of the connecting rod 5 The two ends of the connecting rod 5 are free ends, that is, when one of the two ends of the connecting rod 5 is stressed, the connecting rod 5 will rotate around the rotating end, and when the two ends of the connecting rod 5 are stressed at the same time , it will generate a force to push the connecting rod 5 to move, so that the connecting rod 5 will move, that is to say, when the force is applied to both ends of the connecting rod 5 and one end is stressed, the movement effect of the connecting rod 5 is different , taking advantage of this difference, the first trigger protrusion 201 is provided on the first working head 2 to abut against one end of the connecting rod 5 in the assembled state, and the second working head 3 is provided with the The second trigger protrusion 301 against which the other end of the connecting rod 5 touches;

When one of the first trigger protrusion 201 and the second trigger protrusion 301 abuts against one end of the connecting rod 5, that is, only one end of the connecting rod 5 exerts force, and the connecting rod 5 only rotates, and there may be Minor movement, but negligible;

And when the first trigger protrusion 201 and the second trigger protrusion 301 abut against the two ends of the connecting rod 5 at the same time, the two ends of the connecting rod 5 are stressed at this time, thus they will be pushed to move, and when the connecting rod 5 moves, The start switch 6 can be activated by physical contact, or the start switch 6 can be turned on by a trigger signal such as a photoelectric sensor or a displacement sensor.

Utilizing this effect, when one of the first working head 2 and the second working head 3 is disassembled, the start switch 6 is in an off state, so when the user disassembles one of them, the air blower will not operate , only when the first working head 2 and the second working head 3 are assembled on the casing 1 at the same time, the blowing and suction machine will work, which ensures that the blowing and suctioning machine will not be damaged during the switching process between the blowing mode and the suction mode. The motor, fan, etc. will not hurt the user, and the safety is better.

Specific structure:

As shown in Fig. 3 and Fig. 4, described casing 1 is provided with start switch 6, and start switch 6 is used for controlling the opening and closing of motor 41, and described casing 1 is provided with chute 103, and described connecting rod 5 There is a rotating shaft 51 on it, and the rotating shaft 51 is accommodated in the chute 103 and can slide in the chute 103. The direction of sliding is towards the starting switch 6 or away from the starting switch 6. The rotating shaft 51 is located at the two ends of the connecting rod 5. Between the two free ends, that is, the rotating shaft 51 can either rotate in the chute 103 or move in the chute 103.

As shown in FIG. 3 , the first working head 2 is installed on the right end of the casing 1 and fastened on the casing 1 from right to left, and a first trigger protrusion 201 extends from the left end of the first working head 2 . The free end on the right side of the connecting rod 5 is in an inclined shape. When the first working head 2 is installed on the casing 1, the first trigger protrusion 201 is against the bottom of the free end on the right side of the connecting rod 5. If this When the second working head 3 is not installed on the casing 1, it is equivalent to the force on the right end of the connecting rod 5, which will rotate counterclockwise without moving;

Similarly, the second working head 3 is installed at the bottom of the casing 1, and is fastened on the casing 1 from bottom to top. The top of the second working head 3 extends a second trigger protrusion 301. When the second working head When the head 3 is installed on the casing 1, the second trigger protrusion 301 will be against the bottom of the free end on the left side of the connecting rod 5. If the first working head 2 is not installed on the casing 1 at this time, it is equivalent to connecting The left end of rod 5 is stressed and will rotate clockwise without moving;

However, if the left end and the right end of the connecting rod 5 are stressed at the same time, the connecting rod 5 will slide in the chute 103, and the sliding direction will move toward the start switch 6, that is, move upward in Fig. The switch, the micro switch is a commonly used mechanical touch switch, the structure of which will not be elaborated too much. When the connecting rod 5 moves upward, it will touch the micro switch, thereby starting the motor 41 . Preferably in this embodiment, the top of the connecting rod 5 is provided with a contact protrusion 52 , and the provision of the contact protrusion 52 helps the connecting rod 5 to contact the micro switch.

It should be noted that, in other embodiments, it is not limited to the embodiment of the micro switch, and may also be a photoelectric sensor, that is, a photoelectric sensor, such as an infrared sensor, is arranged on the casing 1, and when the connecting rod 5 moves upward When the photoelectric sensor is used, the light emitted by the photoelectric sensor is blocked. When the photoelectric sensor detects it, the start switch 6 is triggered. .

When one of the first working head 2 and the second working head 3 is removed, the connecting rod 5 can return to the initial state. In this embodiment, the connecting rod 5 needs to be reset. In this embodiment, two resets are adopted. Way to combine:

In the first reset mode, the chute 103 is arranged under the start switch 6. When one of the first working head 2 and the second working head 3 is removed, one end of the connecting rod 5 is not stressed, and the connecting rod 5 will be activated by itself. Due to the influence of gravity, it falls naturally, thereby separating from the start switch 6;

In the second reset method, a reset elastic member 61 is set between the start switch 6 and the connecting rod 5. It should be noted that the reset elastic member 61 can be separately arranged between the start switch 6 and the connecting rod 5, or can be Fixed on the connecting rod 5 or fixed on the start switch 6, this embodiment is preferably fixed on the start switch 6, and is integrated with the start switch 6, the reset elastic member 61 is the elastic metal sheet on the start switch 6, Some starting switches 6 themselves have elastic metal sheets themselves, and the elastic metal sheets are used for conducting the circuit and for resetting, which kills two birds with one stone.

It should be noted that in other embodiments, these two reset methods can be selected one by one, and are not limited to the combined use of the two. When the second reset method is used alone, the connecting rod 5 does not need to be limited to be set at Start switch 6 below.

In order to prevent the connecting rod 5 from rotating excessively during the rotation and reset process, the casing 1 is provided with a limit rib for limiting the rotation range of the connecting rod 5. In this embodiment, the limit rib includes the first rib 104 and the second retaining rib 105, the first retaining rib 104 is used to limit the excessive drop of the right end of the connecting rod 5, and the second retaining rib 105 is used to limit the excessive drop of the left end of the connecting rod 5.

In order to prevent the first working head 2 and the second working head 3 from being assembled at the same time, the connecting rod 5 can stably maintain the state of touching the starting switch 6, and the connecting rod 5 is provided with a protrusion for positioning the first trigger 201 of the first positioning groove 53; the connecting rod 5 is provided with a second positioning groove 54 for positioning the second trigger protrusion 301, using the first positioning groove 53 and the second positioning groove 54, the first trigger protrusion The protrusion 201 and the second trigger protrusion 301 can be stably positioned with the connecting rod 5, and are not easy to move relative to each other, so the stability is better.

In other detailed structures, the first working head 2 and the second working head 3 are snapped together with the casing 1, and the casing 1 is provided with a first button 11 for unlocking the first working head 2, a release Buckle the second button 12 of the second working head 3, and utilize the buckle structure to make disassembly and installation more convenient. In addition, the casing 1 is provided with a first through hole 13 for the first trigger protrusion 201 to extend into. The first through hole 13 is located near the position of the air outlet 102 . The first through hole 13 can also be connected to the air outlet 102 For the same hole, the casing 1 is provided with a second perforation 14 for the second trigger protrusion 301 to extend into. The second perforation 14 is located near the position of the air inlet 102. The second perforation 14 can also be connected with the inlet. The tuyere 102 is the same hole. In addition, the protective cover 32 is hinged on the casing 1. When the suction pipe 31 is not installed, the protective cover 32 is fastened to the casing 1. When the suction pipe 31 is installed, the protective cover 32 is released from the casing 1.

As shown in Figure 5 to Figure 8, it is the position diagram of the connecting rod 5 in various states:

In Fig. 5, it is a blowing mode. At this time, the protective cover 32 and the blowpipe 21 are installed on the casing 1 at the same time. In this state, both ends of the connecting rod 5 are stressed at the same time, and the connecting rod 5 is pushed to offset the start switch 6;

In Fig. 6 is the switching process. At this time, the protective cover 32 is installed on the casing 1, and when the blowpipe 21 is removed, in this state, the first trigger protrusion 201 is separated from the connecting rod 5, and the right end of the connecting rod 5 is not stressed. The connecting rod 5 itself rotates, and is separated from the start switch 6 under the influence of the reset elastic member 61 and its own gravity;

In Fig. 7, it is the suction mode. At this time, the suction pipe 31 is installed on the casing 1, and the grass bag 22 is also installed on the casing 1. In this state, the two ends of the connecting rod 5 are stressed at the same time, and the connecting rod 5 is Push to offset with start switch 6;

In Fig. 8, it is a switching process. At this time, the protective cover 32 and the suction pipe 31 are not installed on the casing 1, and only the grass collecting bag 22 is installed on the casing 1. In this state, the second trigger protrusion 301 and the connecting rod 5 Analysis shows that the left end of the connecting rod 5 is not stressed, the connecting rod 5 itself rotates, and is separated from the start switch 6 under the influence of the reset elastic member 61 and its own gravity.

Example 2

The difference between this embodiment and embodiment 1 is that the chute of this embodiment is set on the connecting rod, while the rotating shaft is set on the casing, and the positions are interchanged, but the effect and function achieved are similar to those in embodiment 1. .

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the accompanying drawings and the description in the above specific embodiments content. Any modifications that do not depart from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims (10)

1. A blower with safe operation, comprising a casing, the casing is detachably connected with a first working head and a second working head, the first working head includes a blowpipe or a grass bag, and the second working head includes a suction pipe Or a protective cover, a start switch is provided in the casing, and it is characterized in that a connecting rod is installed on the casing, and a rotating end is arranged between the two ends of the connecting rod, and the rotating end slides with the casing Cooperate and can be rotated relative to the casing, the first working head is provided with a first trigger protrusion that is in contact with one end of the connecting rod in the assembled state, and the second working head is provided with a trigger protrusion that is in contact with the connecting rod in the assembled state. the second trigger protrusion with the other end against; When one of the first trigger protrusion and the second trigger protrusion abuts against the connecting rod, the connecting rod rotates relative to the casing; When both the first trigger protrusion and the second trigger protrusion abut against the connecting rod at the same time, the connecting rod is pushed and moves relative to the casing to trigger the start switch. 2. The blower with safe operation according to claim 1, wherein a chute is provided on the casing, a rotating shaft is provided on the connecting rod, and the rotating shaft is accommodated in the chute or, the casing is provided with a rotating shaft, the connecting rod is provided with a sliding slot, and the rotating shaft is accommodated in the sliding slot. 3. The safe-to-operate blower according to claim 2, wherein the connecting rod is located below the activation switch. 4. The blower with safe operation according to claim 2, characterized in that an elastic reset member is provided between the start switch and the connecting rod. 5. The blower with safe operation according to any one of claims 1 to 4, characterized in that, the casing is provided with a first through hole for the first trigger protrusion to extend into; and/or, the The casing is provided with a second through hole for the second trigger protrusion to extend into. 6. The blower with safe operation according to any one of claims 1 to 4, characterized in that, the connecting rod is provided with a first positioning groove for positioning the first trigger protrusion; and/or, The connecting rod is provided with a second positioning groove for positioning the second trigger protrusion. 7. The blower with safe operation according to any one of claims 1 to 4, characterized in that, the start switch is a micro switch, and both the first trigger protrusion and the second trigger protrusion engage with the connecting rod at the same time In the counteracting state, the connecting rod moves toward the start switch and contacts with the start switch. 8. The blower with safe operation according to any one of claims 1 to 4, characterized in that, a photoelectric sensor is arranged in the casing, the photoelectric sensor is connected to the start switch, and the connecting rod generates The photo sensor is triggered when moving. 9. The blower with safe operation according to any one of claims 1 to 4, characterized in that, the casing is provided with a limit rib for limiting the rotation range of the connecting rod. 10. The blower with safe operation according to any one of claims 1 to 4, characterized in that, the first working head and the second working head are snapped together with the casing, and the casing is provided with There is a first button for unblocking the first working head and a second button for unblocking the second working head.