CN115016599B - Touch panel assembly and electronic device - Google Patents

Abstract

The embodiment of the application provides a touch pad assembly and electronic equipment. The touch panel assembly includes a housing, a touch panel, a base plate, a bracket, a balance bar, a magnet, and a coil. At least a portion of the touch pad is exposed from the opening of the housing. The bottom plate is arranged on one side of the touch pad and fixedly connected with the shell. The support is arranged between the bottom plate and the touch plate and can move close to or far away from the bottom plate under the drive of the touch plate. The balance rod is supported between the bracket and the shell, is clamped in the shell and is rotationally connected to the bracket. One of the magnet and the coil is arranged on the touch pad, and the other is arranged on the bottom plate. The magnet and coil can attract or repel each other under the influence of electricity. The pressing forces of different pressing positions of the touch pad assembly are basically identical, and user experience is improved.

Description

Touchpad Assembly and Electronics

technical field

The present application relates to the field of touch technology, in particular to a touch panel assembly and electronic equipment using the same.

Background technique

At present, when a user presses a touchpad of an electronic device (eg, a notebook computer), the pressing force required to trigger the key switch is different at different positions, and the user experience is not good.

Contents of the invention

The first aspect of the present application provides a touch panel assembly, which includes:

The shell is provided with an opening;

A touchpad is arranged on one side of the casing, at least part of the touchpad is exposed through the opening, and the touchpad includes key switches;

The bottom plate is arranged on the side of the touchpad away from the housing, and is fixedly connected to the housing;

The bracket is arranged between the base plate and the touch panel, and can move closer to or away from the base plate driven by the touch panel;

The balance bar is supported between the bracket and the housing, the balance bar includes a main body part clamped to the housing and support parts connected to both ends of the main body part, the bracket includes a clamping part, and the support part is rotatably connected to the clamping part;

The magnet and the coil are located between the touch panel and the bottom panel. One of the magnet and the coil is set on the touch panel, and the other is set on the bottom plate. The magnet and the coil can attract or repel each other under the action of electric power.

The touch panel assembly of the embodiment of the present application uses a balance bar to transmit the pressing force. When the touch panel is pressed, the bracket can be driven by the touch panel to move closer to or away from the bottom plate, and then the bracket can drive the balance bar to rotate, so that the balance bar will The pressing force is transmitted to the key switch. In addition, the magnet and the coil can attract or repel each other under the action of electricity, so that the attractive or repulsive force between the coil and the magnet can promote or hinder the relative movement of the touchpad and the bottom plate, thereby compensating for the user to trigger the key switch at different positions. The pressure can achieve the effect that the pressing force of different positions of the touchpad is basically the same, which improves the user experience.

In some embodiments, the bracket is provided with a bracket through hole passing through itself, and the magnet is at least partially accommodated in the coil through the bracket through hole. In this way, the thickness of the entire touch panel assembly can be reduced, which is conducive to the thinning of the entire electronic device to which the touch panel assembly is applied.

In some embodiments, the housing includes a slot, and the main body is snapped into the slot. The main body can rotate axially in the slot, but cannot escape from the slot. In some embodiments, buckles are provided on the opposite sides of the slot, so that the balance bar can be snapped into, and the reliability of the connection between the balance bar and the second housing can be enhanced, so as to prevent the balance bar from falling out of the slot.

In some embodiments, the housing includes an avoidance groove, and the support part can move in the avoidance groove. Due to the setting of the avoidance groove, the balance bar can have a large rotation space, so that the balance bar can transmit the pressing force to the key switch in a timely and efficient manner, so that the key switch can be triggered in time, so that the working performance of the electronic device is more prominent .

In some embodiments, the bracket includes a main board part corresponding to the touchpad and an extension part extending from the main board part beyond the touchpad, the through hole of the bracket is set on the main board part, and the locking part extends from the extension part toward the housing. The main board part is fixed on the touch panel, and when the user presses the touch panel, the support can move up and down toward the base plate together with the touch panel.

In some embodiments, a balance bar is disposed between the extension and the housing. The extension part is fastened on the main part of the balance pole. In this way, when the touch panel is pressed, the bracket drives the balance bar to rotate, and when one end of the balance bar is pressed, the entire balance bar rotates.

In some embodiments, the extension part is provided with an avoidance hole passing through itself, and the support part can move in the avoidance hole. Due to the setting of the avoidance hole, the balance bar has a large rotation space, so that the balance bar can transmit the pressing force to the key switch in a timely and efficient manner, so that the key switch can be triggered in time, so that the working performance of the electronic device is more prominent. .

In some embodiments, a plurality of balance bars are spaced about the opening. The balance bar surrounds the touchpad, because the balance bar is located outside the touchpad, rather than the balance bar is directly supported between the touchpad and the bottom plate, so that the setting of the balance bar has a larger space. To a certain extent, the size of the balance bar can be relatively thicker, thereby improving the ability of the balance bar to transmit pressing force. In this way, the user experience can be improved to a certain extent.

In some embodiments, a plurality of magnets are arranged at intervals, and a plurality of coils are arranged at intervals, and each magnet corresponds to a coil. Since the touch panel assembly is provided with a plurality of coils and a plurality of magnets, and the plurality of coils and a plurality of magnets are distributed, so that when the circuit board senses the user's pressing position on the touch panel, according to the user's pressing position, the control assembly The magnitude of the electromagnetic intensity in the plurality of coils can be adjusted to compensate for the pressing force of the user at different positions, so that the pressing force of the user to trigger the key switch at different positions on the touch panel is basically the same.

In some embodiments, the coil is disposed on the touch panel, and the magnet is disposed on the bottom plate. The coil is electrically connected with the control component on the circuit board. When the user presses the touchpad, the control component can change the direction of the magnetic field of the coil by adjusting the direction of the current applied to the coil, so that the magnet and the coil are in a state of mutual attraction or mutual repulsion, thereby changing the direction of the magnetic force on the touchpad. The control assembly can also adjust the magnitude of the attractive or repulsive force between the magnet and the coil by adjusting the magnitude of the current applied to the coil. In this way, the pressing force required by the user to activate the key switch is compensated, thereby improving user experience.

In some embodiments, the key switch is a key spring, and the bottom plate includes a protrusion that is arranged with the corresponding key spring and can trigger the key spring. When the button shrapnel touches the protrusion on the bottom plate, the button shrapnel is pressed by the protrusion, and the middle part of the button shrapnel is concave. After the middle part contacts the circuit on the circuit board, a loop is formed, and the circuit board will convert the pressing action into an electrical signal to Make an electronic device (eg, a notebook computer) perform a corresponding operation (eg, input from a keyboard or click a mouse).

In some embodiments, the key switch is arranged in the middle of the touchpad, but it is not limited thereto.

In some embodiments, the touch panel further includes a control component, the bottom plate is provided with a bottom plate through hole passing through itself, and the control component is exposed from the bottom plate through hole. In this way, it is beneficial to dissipate heat from the devices on the circuit board, or to connect these devices with other components of the electronic equipment.

In some embodiments, the bottom plate includes a mounting portion, and the second housing includes a mounting hole. The mounting part is fixedly connected to the mounting hole by a fastener (such as a screw). In some other embodiments, the base plate and the housing can also adopt other fixed connection methods, such as the housing and the base plate, one of which is provided with a clamping hole, and the other is provided with a clamping block, and the clamping hole and the clamping block are snap fit , so as to realize the matching connection between the bottom plate and the shell.

The second aspect of the present application provides an electronic device, which includes the above-mentioned touch panel assembly. The electronic device is, for example, a notebook computer. Since it includes the above-mentioned touchpad assembly, it can realize global pressing, and can achieve the effect that the surrounding force is basically equal to the pressing force in the middle, and has a better user experience.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be viewed The scope is limited, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of an electronic device in some embodiments of the present application.

FIG. 2 is an exploded view of a touchpad assembly in some embodiments of the present application.

Fig. 3 is a schematic diagram of assembled housing, touch panel, coil and balance bar in some embodiments of the present application.

Fig. 4 is a schematic diagram of assembled casing, touch panel, coil, balance bar and bracket in some embodiments of the present application.

Fig. 5 is a schematic diagram of the distribution of magnets on the bottom plate in some embodiments of the present application.

Fig. 6 is a schematic front view of a touch panel assembly in some embodiments of the present application.

Fig. 7 is a schematic diagram of the back of the touch panel assembly in some embodiments of the present application.

Fig. 8 is a schematic structural diagram of a touch component being pressed in some embodiments of the present application.

Description of main component symbols:

electronic equipment 100

Display 20

keyboard 30

touchpad assembly 10

shell 11

Opening 111a

first case 111

first opening 1111

Second housing 112

Second opening 1121

Buckle 1122

Avoidance slot 1123

Mounting hole 1124

Card slot 1125

touchpad 12

circuit board 121

Key switch 122

control components 123

chip 1231

connector 1232

Adhesive layer 124

Operation layer 125

balance bar 13

Main body 131

Support 132

bracket 14

Motherboard 141

Bracket through hole 1411

Extension 142

Avoidance hole 1421

Snap-in part 143

Coil 15

magnet 16

Bottom plate 17

bump 171

Bottom plate through hole 172

Installation Department 173

Fasteners 18

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some, not all, embodiments of the application.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art of this application. The terminology used herein in the description of the application is only for the purpose of describing specific embodiments, and is not intended to limit the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Some implementations of this application are described in detail. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

Fig. 1 is a schematic structural diagram of an electronic device in some embodiments of the present application. As shown in FIG. 1 , the electronic device 100 is a notebook computer. The electronic device 100 includes a display screen 20 , a keyboard 30 and a touchpad assembly 10 . The touchpad assembly 10 can replace the mouse to control the electronic device 100 to improve the portability of the electronic device 100, or the touchpad assembly 10 can work with the mouse.

FIG. 2 is an exploded view of the structure of the touch panel assembly 10 in some embodiments of the present application. As shown in FIG. 2 , the touchpad assembly 10 includes a housing 11 , a touchpad 12 , a balance bar 13 , a bracket 14 , a bottom plate 17 , a coil 15 , a magnet 16 and a fastener 18 .

The housing 11 is used to fix the balance bar 13 and the bottom plate 17 . The touchpad 12 is located on one side of the casing 11 . The bottom plate 17 is disposed on a side of the touchpad 12 away from the casing 11 . The bracket 14 is located between the touchpad 12 and the bottom plate 17 . The balance bar 13 is located between the bottom plate 17 and the housing 11 . The balance bar 13 is rotatably connected to the housing 11 and snapped to the bracket 14 . The bracket 14 is a moving part, which is fixed on the touchpad 12 and can move closer to or away from the bottom plate 17 driven by the touchpad 12 . The balance bar 13 is supported between the bracket 14 and the housing 11 , and can rotate around a set fulcrum of the bracket 14 . The touchpad 12 includes a key switch 122. When the touchpad 12 is pressed, the touchpad 12 drives the support 14 to move toward the bottom plate 17, so that the support 14 drives the balance bar 13 to rotate around the set fulcrum of the support 14, thereby bearing the touchpad 12. The pressing force is transmitted to the key switch 122. The magnet 16 and the coil 15 are located between the touchpad 12 and the bottom plate 17 . The magnet 16 and the coil 15 can attract or repel each other, thereby compensating the pressing force required to activate the key switch 122 . The touch panel assembly 10 can achieve the same pressing pressure in the whole area through the electromagnetic auxiliary compensation adjustment, so as to improve the user experience.

As shown in FIG. 2 , the housing 11 includes a first housing 111 and a second housing 112 connected to the first housing 111 . The first housing 111 is provided with a first opening 1111 , and the second housing 112 is provided with a second opening 1121 . The first opening 1111 is defined in a substantially middle portion of the first casing 111 . The second opening 1121 is opened in a substantially middle portion of the second casing 112 . The first opening 1111 and the second opening 1121 are substantially rectangular. The second opening 1121 corresponds to and communicates with the first opening 1111 to jointly form the opening 111a shown in FIG. 6 . In some embodiments, the size of the second opening 1121 is greater than or equal to the size of the first opening 1111 . That is, the second case 112 is not exposed at the first opening 1111 . In other embodiments, the shapes, positions and sizes of the first opening 1111 and the second opening 1121 are not limited thereto.

The material of the first housing 111 is, for example, metal to enhance the mechanical strength of the housing 11 . The material of the second housing 112 is, for example, plastic. In other embodiments, the first housing 111 and the second housing 112 are integrally formed, and the material is plastic or metal.

As shown in FIG. 2 , the touchpad 12 is disposed on one side of the casing 11 . The size of the touchpad 12 is roughly equivalent to the size of the first opening 1111 and the second opening 1121 . The touchpad 12 is disposed corresponding to the first opening 1111 and the second opening 1121 of the casing 11 . After the touchpad 12 is assembled on the casing 11 , at least part of the touchpad 12 is exposed through the second opening 1121 and the first opening 1111 for the user to perform touch and press operations.

Specifically, the touchpad 12 includes a circuit board 121 , a key switch 122 , a control component 123 , an adhesive layer 124 and an operation layer 125 . The circuit board 121 may be a printed circuit board, which also includes other circuits and other electronic devices (not shown) for realizing touch and/or press operations.

Both the key switch 122 and the control component 123 are located on the circuit board 121 and face the bottom plate 17 . The key switch 122 is disposed in the middle of the touch panel 12, but is not limited thereto. In some embodiments, the key switch 122 is a key spring (also known as a dome), which is electrically connected to the circuit board 121 . The material of the bottom plate 17 may be metal, and the bottom plate 17 includes a protrusion 171 disposed corresponding to the key switch 122 and capable of triggering the key switch 122 . When the button shrapnel touches the protrusion 171 on the bottom plate 17, the button shrapnel is pressed by the protrusion 171, the middle part of the button shrapnel is concave, and after the middle part contacts the circuit on the circuit board 121, a loop is formed, and the circuit board 121 will convert the pressing action It is an electrical signal, so that the electronic device 100 (eg, a notebook computer) performs a corresponding operation (eg, an input from the keyboard 30 or a mouse click).

The control component 123 includes an electrically connected chip 1231 and a connector 1232 , and the connector 1232 may be a flexible flat cable (Flexible Flat Cable, FFC) connector 1232 . The chip 1231 and the connector 1232 are electrically connected to the circuit board 121 to work together to identify touch and/or press operations.

The operation layer 125 is located on the side of the circuit board 121 close to the housing 11 , and the operation layer 125 is a film layer that accepts touch and/or press operations by the user. The operation layer 125 can protect the circuit board 121 below it and the components on the circuit board 121 . In addition, after the touchpad 12 is assembled with the casing 11 , the operation layer 125 is exposed from the opening 111 a of the casing 11 , and also serves as a surface directly contacted by the user for touch and press operations. In some embodiments, the material of the operation layer 125 is glass or plastic.

The adhesive layer 124 is located between the circuit board 121 and the operation layer 125 . The adhesive layer 124 is used for bonding and fixing the circuit board 121 and the operation layer 125 . In some embodiments, the material of the adhesive layer 124 is double-sided tape, but is not limited thereto. As shown in FIG. 2 , a plurality of coils 15 are fixed on the circuit board 121 at intervals. The coil 15 is electrically connected to the control component 123 on the circuit board 121 . The four coils 15 are distributed in two rows and two columns on the circuit board 121 . Positionally, there is a magnet 16 corresponding to each coil 15 . The coil 15 is a circular coil 15, and the magnet 16 is a circular magnet 16, and the shapes of the two are adapted, but not limited thereto. As shown in FIG. 5 , a plurality of magnets 16 are disposed on the bottom plate 17 at intervals. Coil 15 and magnet 16 cooperate to compensate for the pressing force required by the user to activate key switch 122 . In some other embodiments, the number and position of the coils 15 are not limited thereto. Furthermore, the coil 15 can also be arranged on the base plate 17 , and the magnet 16 can be arranged on the circuit board 121 , and the two cooperate to compensate the pressing force required by the user to activate the key switch 122 .

Specifically, when the user presses the touch panel 12, the control component 123 can change the direction of the magnetic field of the coil 15 by adjusting the direction of the current applied to the coil 15, so that the magnet 16 and the coil 15 are in a state of mutual attraction or mutual repulsion, thereby changing The direction of the magnetic force on the touchpad 12 . The control component 123 can also adjust the magnitude of the attractive or repulsive force between the magnet 16 and the coil 15 by adjusting the magnitude of the current applied to the coil 15 . In this way, the pressing force required by the user to activate the key switch 122 is compensated, thereby improving user experience.

Please continue to refer to FIG. 2 , if the housing 11 is defined as the uppermost layer of the touchpad assembly 10 , then the bottom plate 17 is the lowermost layer of the touchpad assembly 10 . The bottom plate 17 is a fixing part, which is fixedly connected to the second housing 112 . Specifically, the bottom plate 17 includes a mounting portion 173 , and the second housing 112 includes a mounting hole 1124 . The mounting portion 173 is fixedly connected to the mounting hole 1124 through a fastener 18 (such as a screw).

In other embodiments, the base plate 17 and the housing 11 can also adopt other fixed connection methods, such as the housing 11 and the base plate 17, one of which is provided with a card hole, and the other is provided with a card block, card hole and card The blocks are clamped and fitted, so as to realize the fitting connection between the base plate 17 and the housing 11.

Please refer to FIG. 2 , FIG. 5 and FIG. 7 in conjunction, the base plate 17 is provided with a base plate through hole 172 penetrating through itself. After the base plate 17 is assembled on the housing 11 , the control assembly 123 is exposed through the through hole 172 of the base plate. In this way, it is beneficial to dissipate heat from the devices on the circuit board 121 , or to connect these devices with other components of the electronic device 100 .

Please refer to FIG. 2 and FIG. 3 together, a plurality of balance bars 13 are arranged at intervals around the second opening 1121 . Each balance pole 13 includes a main body portion 131 and support portions 132 connected to two ends of the main body portion 131 . The main body portion 131 and the support portion 132 are substantially cylindrical. The material of the balance bar 13 can be metal with high modulus of elasticity. The supporting part 132 and the main body part 131 can be integrally formed to form a substantially U-shaped bar. The second housing 112 has a plurality of slots 1125 around the second opening 1121 . The cross-section of the slot 1125 is arc-shaped, matching with the main body 131 . The main body 131 of each balance bar 13 is locked in the slot 1125 , and can rotate axially in the slot 1125 , but does not disengage from the slot 1125 . Buckles 1122 are provided on the opposite sides of the slot 1125 for snapping into the balance bar 13 , enhancing the reliability of the connection between the balance bar 13 and the second housing 112 and preventing the balance bar 13 from falling out of the slot 1125 .

Please refer to FIG. 2 and FIG. 4 , the bracket 14 includes a main board part 141 corresponding to the touchpad 12 , an extension part 142 extending from the main board part 141 beyond the touchpad 12 , and a locking part extending from the extension part 142 toward the housing 11 143. The material of the bracket 14 can be metal or plastic, but not limited thereto. The main board part 141 is fixed on the touchpad 12 . When the user presses the touchpad 12 , the bracket 14 can move up and down toward the bottom plate 17 together with the touchpad 12 . The main board portion 141 is provided with a bracket through hole 1411 penetrating itself. The chip 1231 , the connector 1232 , the key switch 122 , the coil 15 and the like disposed on the circuit board 121 are exposed through the bracket through hole 1411 . In some embodiments, the magnet 16 is at least partially accommodated in the coil 15 through the bracket through hole 1411 , so as to reduce the thickness of the entire touchpad assembly 10 , which is beneficial to thinning the electronic device 100 as a whole.

As shown in FIG. 4 , the balance bar 13 is located between the second housing 112 and the bracket 14 . The extension portion 142 of the bracket 14 is buckled on the main portion 131 of the balance pole 13 . The engaging portion 143 of the bracket 14 has a semicircular notch matching the shape of the supporting portion 132 , and the supporting portion 132 is engaged with the engaging portion 143 and can rotate around the engaging portion 143 . Press the touch panel 12, the bracket 14 drives the balance bar 13 to rotate, and when one end of the balance bar 13 is pressed, the entire balance bar 13 rotates.

Please refer to FIG. 2 and FIG. 4 , the extension portion 142 of the bracket 14 is provided with a relief hole 1421 passing through itself, and the second housing 112 is provided with a relief groove 1123 communicating with the second opening 1121 . The escape groove 1123 communicates with the avoidance hole 1421 , and the supporting part 132 can move in the escape groove 1123 and the avoidance hole 1421 . Due to the setting of the escape hole 1421 and the escape groove 1123, the balance bar 13 has a large rotation space, so that the balance bar 13 can transmit the pressing force to the key switch 122 in a timely and efficient manner, so that the key switch 122 can be triggered in time, Therefore, the working performance of the electronic device 100 is more outstanding.

The balance bar 13 is used to transmit the pressing force on the touchpad 12 to the key switch 122 . The process of this pressing force transmission will be specifically described below. For the convenience of description, the support portions 132 defining opposite ends of the main body portion 131 of the balance pole 13 are respectively a first support portion and a second support portion. When the position of the touchpad 12 corresponding to the first supporting part is pressed, the position of the balance bar 13 adjacent to the first supporting part is subjected to a downward and rotating force, so that the first supporting part is driven by the bracket 14 around the locking part 143. Set the fulcrum to rotate (or form a lever at the clamping part 143, the contact point between the clamping part 143 and the first support part is the set fulcrum of the clamping part 143), the main body 131 of the balance bar 13 is locked Rotate in the slot 1125 , and then the second support portion 132 at the other end of the balance bar 13 rotates around the locking portion 143 of the bracket 14 . In this way, under the cooperation of the clamping portion 143 of the bracket 14 and the supporting portion 132 of the balance bar 13 , the bracket 14 drives the entire touchpad 12 to move toward the bottom plate 17 . When the key switch 122 touches the protrusion 171 on the bottom plate 17, the key switch 122 is triggered, and the electronic device 100 (eg, a notebook computer) can perform corresponding operations (eg, click a mouse or input from the keyboard 30 , etc.).

It should be noted that the switch triggering of the existing touch panel is mainly semi-domain, that is, only a partial area of the touch panel can trigger the switch. This causes inconvenience to the user's operation. In the embodiment of the present application, by setting a plurality of balance bars, the pressing force received by any position on the touch panel can be transmitted to the key switch, so as to realize global triggering of keys and enhance user experience.

In addition, the existing touch panel has the problem that the trigger force and trigger stroke are different at different positions. Specifically, the trigger force and trigger stroke are small at a position close to the key switch, while the trigger force and trigger stroke are large at a position far from the key switch, so that the user experience is not good. In the embodiment of the present application, by increasing the number of balance bars, the difference in trigger force and trigger stroke at different positions can be reduced to a certain extent. Moreover, in the embodiment of the present application, the balance bar surrounds the touchpad, since the balance bar is located outside the touchpad, rather than the balance bar is directly supported between the touchpad and the bottom plate, so that the setting of the balance bar has a larger space, Therefore, to a certain extent, the size of the balance bar can be relatively thicker, thereby improving the ability of the balance bar to transmit pressing force, so that the user experience can be improved to a certain extent.

Considering the limitation of the system space, the balance bar cannot be made infinitely thick, and considering the influence of the material modulus of the balance bar, the influence of the assembly gap, etc., in the embodiment of the present application, a Coils and magnets are used to further improve the user experience, so that the trigger force and trigger stroke of the entire touchpad 12 are basically consistent.

In the embodiment of the present application, the touch panel 12 is a moving part, and the bottom plate 17 is a fixed part. One of the coil 15 and the magnet 16 is arranged on the touch panel 12, and the other is arranged on the bottom plate 17. When the coil 15 is energized , an attractive or repulsive force can be generated between the coil 15 and the magnet 16 to promote or hinder the movement of the touchpad 12 to the bottom plate 17 and compensate the pressing force required by the user to activate the key switch 122 . In this way, when the user presses any position of the touch panel 12 to trigger the key switch 122 , there is approximately or the same pressing force.

As shown in Figure 8, when the user presses the edge area of the touchpad 12, the current to the coil 15 can be controlled, so that the coil 15 and the magnet 16 are in a state of mutual attraction, and the attractive force received by the touchpad 12 can compensate the user's pressing force , to promote the movement of the touchpad 12 to the bottom plate 17, so that the actual pressing force of the user will be smaller than that without the action of the coil 15 and the magnet 16, so as to achieve the effect that the user presses the central position of the touchpad 12 with the same pressing force. Moreover, due to the effect of the coil 15 and the magnet 16 , when the peripheral area is pressed, the stroke of the pressing point will be smaller than that without the effect of the coil 15 and the magnet 16 .

In some embodiments, when the user presses the touchpad 12, the coil 15 and the magnet 16 can also be controlled so that the two are in a state of mutual repulsion, so that the touchpad 12 can be quickly and The user's fingers are separated to enhance the user experience.

In addition, in the embodiment of the present application, the touch panel assembly is provided with a plurality of coils and a plurality of magnets, and the plurality of coils and the plurality of magnets are dispersedly arranged. When the circuit board senses the user's pressing position on the touch panel, according to the user's pressing position, the control component can adjust the magnitude of the electromagnetic intensity in the multiple coils to compensate for the user's pressing force at different positions, so that the touch panel can The pressing force that the user can trigger the key switch at different positions is basically the same.

It should be noted that the existing touch panels include the following three types.

The first is to use scissors to control the distance between the touchpad and the bottom plate. However, due to the small size of the scissor feet, the distance that can be adjusted is limited, and there are still problems of unbalanced trigger force and trigger stroke at different positions. However, in the touch panel assembly of the embodiment of the present application, a plurality of balance bars are used to transmit pressing force, and the balance bars are located outside the touch panel, rather than the balance bars are directly supported between the touch panel and the bottom plate, so that the setting of the balance bars has The large space makes the size of the balance bar relatively thicker to a certain extent, thereby improving the ability of the balance bar to transmit pressing force. In addition, in the embodiment of the present application, the arrangement of the coil and the magnet can further compensate the pressing force at different positions and improve the user experience.

The second is to use the pressure sensing method, and place a pressure strain gauge under the touchpad. When the user presses the touchpad, the resistance of the strain gauge will change. When the user presses more than the set value, the linearity near the touchpad will The motor drives the touchpad to vibrate to give user feedback. However, in this way, for each touch panel module produced, because of its different deformation, the inherent electrical parameters of the strain gauges corresponding to the same force are very different during production, so it is required for each The touchpad module needs to be calibrated one by one after assembly to determine the compensation parameters, which has a great impact on production efficiency. In the later use of the user, when a large deformation occurs, the pressure sensing may be biased. In the touch panel assembly of the embodiment of the present application, the implementation cost of the balance bar, the coil and the magnet is lower than that of the strain gauge, and it is a repetitive manufacturing process, which is simpler than the preparation of the strain gauge. In addition, the key switch uses a dome, and its pressure curve is better than that of a vibration motor.

The third way is to use piezoelectric ceramics to give users feedback on pressing. However, in this method, the piezoceramics at different positions will start to vibrate after receiving the feedback, and there will be a delay problem; in addition, the vibrations given by the piezoceramics will be different when pressing different positions, which is very difficult for the user. The vibration feedback at different positions is different, which will make the user feel insensitive to press the switch. Referring to the above analysis, the touch panel assembly of the embodiment of the present application is based on the button shrapnel and multiple balance bars, combined with coils and magnets for electromagnetic compensation adjustment, has a simple structure, and can realize global pressing. To achieve the effect that the strength of the four sides is basically the same as the pressure in the middle, and improve the user experience.

The above embodiments are only used to illustrate the technical solutions of the present application without limitation. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced All should not deviate from the spirit and scope of the technical solution of the present application.

Claims (13)

1. A touch panel assembly, characterized in that, comprising: The shell is provided with an opening; a touchpad, disposed on one side of the housing, at least part of the touchpad is exposed from the opening, and the touchpad includes a key switch; a bottom plate, disposed on a side of the touchpad away from the housing, and fixedly connected to the housing; The bracket is arranged between the base plate and the touch panel, and can move closer to or away from the base plate driven by the touch panel; A balance bar, supported between the bracket and the housing, the balance bar includes a main body and support parts connected to both ends of the main body, the bracket includes a clamping part, and the main body is clamped In the housing, the supporting part is rotatably connected to the clamping part, and a plurality of the balance bars are arranged at intervals around the opening; and The magnet and the coil are located between the touch panel and the bottom plate, one of the magnet and the coil is arranged on the touch panel, and the other is arranged on the bottom plate, and the magnet and the The coils can attract or repel each other under the action of electricity, so as to compensate the pressing force that can trigger the key switch at different positions of the touch panel. 2 . The touch panel assembly according to claim 1 , wherein the bracket is provided with a bracket through hole passing through itself, and the magnet is at least partially accommodated in the coil through the bracket through hole. 3 . 3. The touch panel assembly according to claim 1 or 2, wherein the housing includes a slot, and the main body part is snapped into the slot. 4. The touch panel assembly according to any one of claims 1 to 3, wherein the housing includes an avoidance groove, and the support part can move in the escape groove. 5. The touch panel assembly according to any one of claims 1 to 4, wherein the bracket comprises a main board part corresponding to the touch pad and an extension extending from the main board part beyond the touch pad. part, the bracket through hole is disposed on the main board part, and the locking part extends from the extension part toward the housing. 6. The touchpad assembly according to claim 5, wherein the balance bar is disposed between the extension part and the housing. 7. The touch panel assembly according to claim 5 or 6, wherein the extension part is provided with an avoidance hole passing through itself, and the support part can move in the avoidance hole. 8. The touch panel assembly according to any one of claims 1 to 7, wherein a plurality of the magnets are arranged at intervals, a plurality of the coils are arranged at intervals, and each of the magnets corresponds to one of the coils. 9. The touch panel assembly according to any one of claims 1 to 8, wherein the coil is disposed on the touch panel, and the magnet is disposed on the bottom plate. 10. The touch panel assembly according to any one of claims 1 to 9, wherein the key switch is a key spring, and the bottom plate includes a button corresponding to the key spring and capable of triggering the key spring. raised. 11. The touch panel assembly according to any one of claims 1 to 10, wherein the key switch is arranged in the middle of the touch panel. 12. The touch panel assembly according to any one of claims 1 to 11, wherein the touch panel further comprises a control component, the bottom plate is provided with a bottom plate through hole penetrating itself, and the control component is connected from The bottom plate is exposed at the through hole. 13. An electronic device, characterized by comprising the touch panel assembly according to any one of claims 1-12.

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