CN115016599B

CN115016599B - Touch panel assembly and electronic device

Info

Publication number: CN115016599B
Application number: CN202111301773.XA
Authority: CN
Inventors: 李匡; 黄�隆; 赵敏; 杨晓宁; 张建飞
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2023-05-30
Anticipated expiration: 2041-11-04
Also published as: CN115016599A

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

Touch panel assembly and electronic device

Technical Field

The application relates to the technical field of touch control, in particular to a touch pad assembly and electronic equipment using the same.

Background

Currently, when a user performs a pressing operation on a touch pad of an electronic device (such as a notebook computer), the pressing forces required for triggering a key switch at different positions are different, and the experience is poor.

Disclosure of Invention

A first aspect of the present application provides a touch pad assembly, comprising:

a housing provided with an opening;

the touch panel is arranged on one side of the shell, at least part of the touch panel is exposed from the opening, and the touch panel comprises a key switch;

the bottom plate is arranged on one side of the touch pad far away from the shell and is fixedly connected with the shell;

the bracket is arranged between the bottom plate and the touch plate and can move close to or away from the bottom plate under the drive of the touch plate;

the balance rod is supported between the bracket and the shell and comprises a main body part clamped in the shell and supporting parts connected with two ends of the main body part, the bracket comprises a clamping part, and the supporting parts are rotatably connected with the clamping part; and

and the magnet and the coil are positioned between the touch panel and the bottom plate, one of the magnet and the coil is arranged on the touch panel, the other is arranged on the bottom plate, and the magnet and the coil can be mutually attracted or mutually repulsed under the action of electric power.

According to the touch panel assembly, the balance bar is used for transmitting pressing force, when the touch panel is pressed, the support can move close to or away from the bottom plate under the driving of the touch panel, and then the support can drive the balance bar to rotate, so that the balance bar transmits the pressing force to the key switch. In addition, the magnet and the coil can attract or repel each other under the action of electric power, so that the relative motion of the touch pad and the bottom plate can be promoted or blocked through attractive force or repulsive force between the coil and the magnet, further, the pressing force of triggering the key switch at different positions of a user is compensated, the effect that the pressing force at different positions of the touch pad is basically equivalent is achieved, and the user experience is improved.

In some embodiments, the support is provided with a support through hole extending through itself, through which the magnet is at least partially housed within the coil. Therefore, the thickness of the whole touch pad assembly can be reduced, and the whole electronic equipment applying the touch pad assembly is light and thin.

In some embodiments, the housing includes a slot, and the main body is clamped in the slot. The main body part can axially rotate in the clamping groove, but cannot be separated from the clamping groove. In some embodiments, the opposite sides of the clamping groove are further provided with a buckle, so that the balance bar can be clamped in, and the reliability of connection between the balance bar and the second shell is enhanced, so that the balance bar is prevented from falling off from the clamping groove.

In some embodiments, the housing includes a relief slot in which the support portion is movable. Due to the arrangement of the avoidance groove, the balance rod can have a large rotation space, so that the balance rod can timely and efficiently transmit the pressing force to the key switch, the key switch can be timely triggered, and the working performance of the electronic equipment is more outstanding.

In some embodiments, the support includes a main board portion disposed corresponding to the touch pad and an extension portion extending beyond the touch pad from the main board portion, the support through hole is disposed on the main board portion, and the clamping portion extends from the extension portion toward the housing. The main plate portion is fixed to the touch panel, and when the user presses the touch panel, the bracket can move up and down along with the touch panel toward the bottom plate.

In some embodiments, the balance bar is disposed between the extension and the housing. The extension part is buckled on the main body part of the balance bar. Thus, pressing the touch panel, the support drives the balance bar to rotate, and when one end of the balance bar is pressed, the whole balance bar rotates.

In some embodiments, the extension is provided with a relief hole therethrough, in which the support is movable. Due to the arrangement of the avoidance holes, the balance rod can have a large rotation space, so that the balance rod can timely and efficiently transmit the pressing force to the key switch, the key switch can be timely triggered, and the working performance of the electronic equipment is more outstanding.

In some embodiments, a plurality of balance bars are spaced around the opening. The balance bar surrounds the touch panel, and the balance bar is positioned on the outer side of the touch panel, but is not directly supported between the touch panel and the bottom plate, so that the balance bar is arranged in a larger space. To a certain extent, the size of the balance bar can be thickened relatively, so that the capability of the balance bar for transmitting pressing force is improved. Thus, the user experience degree can be improved to a certain extent.

In some embodiments, a plurality of magnets are spaced apart and a plurality of coils are spaced apart, one for each magnet. Because the touch panel component is provided with a plurality of coils and a plurality of magnets, and the plurality of coils and the plurality of magnets are arranged in a scattered way, when the circuit board senses the pressing position point of a user on the touch panel, the control component can adjust the electromagnetic intensity in the plurality of coils according to the pressing position of the user so as to compensate the pressing force of the user at different positions, and the pressing force of the user on the touch panel at different positions can trigger the key switch is basically equal.

In some embodiments, the coil is disposed on the touch pad and the magnet is disposed on the base plate. The coil is electrically connected with the control component on the circuit board. When a user presses the touch pad, the control component can change the magnetic field direction of the coil by adjusting the direction of current applied to the coil, so that the magnet and the coil are in a mutually attractive or mutually repulsive state, and the direction of magnetic force applied to the touch pad is changed. The control assembly is also capable of adjusting 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. Therefore, the pressing force required by the user to trigger the key switch is compensated, and the user experience is improved.

In some embodiments, the key switch is a key spring, and the bottom plate includes a protrusion disposed corresponding to the key spring and capable of triggering the key spring. When the button spring contacts the bulge on the bottom plate, the button spring is pressed by the bulge, the middle part of the button spring is concave, and after the middle part of the button spring contacts the circuit on the circuit board, a loop is formed, and the circuit board can convert the pressing action into an electric signal so as to enable the electronic equipment (such as a notebook computer) to perform corresponding operation (such as keyboard input or mouse clicking).

In some embodiments, the key switch is disposed in the middle of the touch pad, but is not limited thereto.

In some embodiments, the touch panel further includes a control assembly, the chassis being provided with a chassis through hole therethrough, the control assembly being exposed from the chassis through hole. Therefore, the heat dissipation of devices on the circuit board is facilitated, or the devices are connected with other components of the electronic equipment.

In some embodiments, the base plate includes a mounting portion and the second housing includes a mounting hole. The mounting portion is fixedly connected to the mounting hole by a fastener (e.g., a screw). In other embodiments, the base plate and the housing may be fixedly connected, for example, one of the housing and the base plate is provided with a clamping hole, and the other one of the housing and the base plate is provided with a clamping block, and the clamping hole and the clamping block are in clamping fit, so that the base plate and the housing are in matching connection.

A second aspect of the present application provides an electronic device comprising the above-described touch pad assembly. The electronic device is, for example, a notebook computer, and the touch pad assembly can realize the effect that the force around the touch pad assembly is basically equal to the pressing force in the middle, so that the touch pad assembly has better user experience.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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 touch pad assembly in some embodiments of the present application.

Fig. 3 is a schematic view of an assembled housing, touch pad, coil and balance bar according to some embodiments of the present application.

Fig. 4 is a schematic view of an assembled housing, touch pad, coil, balance bar and bracket according to some embodiments of the present application.

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

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

FIG. 7 is a schematic rear view of a touch pad assembly in some embodiments of the present application.

Fig. 8 is a schematic diagram of a structure in which a touch assembly is pressed in some embodiments of the present application.

Description of main reference numerals:

electronic device 100

Display screen 20

Keyboard 30

Touch pad assembly 10

Housing 11

Opening 111a

First housing 111

First opening 1111

Second housing 112

Second opening 1121

Buckle 1122

Dodge groove 1123

Mounting hole 1124

Clamping groove 1125

Touch panel 12

Circuit board 121

Key switch 122

Control assembly 123

Chip 1231

Connector 1232

Adhesive layer 124

Handling layer 125

Balance bar 13

Body portion 131

Support portion 132

Support 14

Main board portion 141

Bracket through hole 1411

Extension 142

Dodging hole 1421

Clamping portion 143

Coil 15

Magnet 16

Bottom plate 17

Projection 171

Bottom plate through hole 172

Mounting portion 173

Fastener 18

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. 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 the like are used herein for illustrative purposes 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 to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments may be combined with each other without collision.

Fig. 1 is a schematic structural diagram of an electronic device according to 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 20, a keyboard 30, and a touchpad assembly 10. The touch pad assembly 10 may control the electronic device 100 instead of a mouse to improve portability of the electronic device 100, or the touch pad assembly 10 may work in conjunction with a mouse.

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

The housing 11 is used to secure the balance bar 13 and the bottom plate 17. The touch panel 12 is located at one side of the housing 11. The bottom plate 17 is provided on a side of the touch panel 12 remote from the housing 11. The support 14 is located between the touch panel 12 and the chassis 17. The balance bar 13 is located between the base plate 17 and the housing 11. The balance bar 13 is rotatably connected to the housing 11 and is clamped to the bracket 14. The support 14 is a moving member, and is fixed to the touch panel 12 and can move close to or away from the bottom plate 17 under the driving of the touch panel 12. The balance lever 13 is supported between the bracket 14 and the housing 11, and is rotatable about a set fulcrum of the bracket 14. The touch panel 12 includes a key switch 122, when the touch panel 12 is pressed, the touch panel 12 drives the support 14 to move towards the bottom plate 17, so that the support 14 drives the balance bar 13 to rotate around a set pivot of the support 14, and the pressing force born by the touch panel 12 is transferred to the key switch 122. The magnet 16 and the coil 15 are located between the touch panel 12 and the bottom plate 17. The magnet 16 and the coil 15 can attract or repel each other to compensate for the pressing force required to trigger the key switch 122. The touch pad assembly 10 can achieve the same pressing force in the whole domain through electromagnetic auxiliary compensation adjustment, and user experience is improved.

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 opened at a substantially middle portion of the first housing 111. The second opening 1121 is opened at a substantially middle portion of the second housing 112. The first opening 1111 and the second opening 1121 are substantially rectangular. The second openings 1121 correspond in position to and communicate with the first openings 1111, collectively forming openings 111a shown in fig. 6. In some embodiments, the second opening 1121 has a size that is equal to or greater than the size of the first opening 1111. That is, the second housing 112 is not exposed at the first opening 1111. In other embodiments, the shape, position, and size of the first and

second openings

1111, 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 are made of plastic or metal.

As shown in fig. 2, the touch panel 12 is provided at one side of the housing 11. The size of the touch panel 12 is approximately equivalent to the sizes of the first opening 1111 and the second opening 1121. The touch panel 12 is disposed corresponding to the first opening 1111 and the second opening 1121 of the housing 11. After the touch panel 12 is assembled to the housing 11, at least a portion of the touch panel 12 is exposed through the second opening 1121 and the first opening 1111 for a user to perform a touch pressing operation.

Specifically, the touch panel 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 that also includes other circuitry and other electronics (not shown) for implementing touch and/or press operations.

The key switch 122 and the control assembly 123 are both located on the circuit board 121 and face the base plate 17. The key switch 122 is provided at the middle of the touch panel 12, but is not limited thereto. In some embodiments, the key switch 122 is a key spring (also called a dome), which is electrically connected to the circuit board 121. The material of the base plate 17 may be metal, and the base plate 17 includes a protrusion 171 that is disposed corresponding to the key switch 122 and is capable of activating the key switch 122. When the button spring contacts the protrusion 171 on the bottom plate 17, the button spring is pressed by the protrusion 171, the middle portion of the button spring is concave, and after the middle portion of the button spring contacts the circuit on the circuit board 121, a loop is formed, and the circuit board 121 converts the pressing action into an electrical signal, so that the electronic device 100 (e.g., a notebook computer) performs a corresponding operation (e.g., inputting the keyboard 30 or clicking the mouse).

The control assembly 123 includes a chip 1231 and a connector 1232 that are electrically connected, 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 cooperatively identify a touch and/or press operation.

The operation layer 125 is located on the side of the circuit board 121 near the housing 11, and the operation layer 125 is a film layer for receiving touch and/or pressing operations by a user. The operation layer 125 may function to protect the circuit board 121 located thereunder and the components located on the circuit board 121. Further, after the touch panel 12 is assembled with the housing 11, the operation layer 125 is exposed from the opening 111a of the housing 11, and also serves as a surface that the user touches directly by the touch-and-press operation. In some embodiments, the material of the handle layer 125 is glass or plastic.

The adhesive layer 124 is located between the circuit board 121 and the handle layer 125. The adhesive layer 124 is used to adhesively fix 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 to the circuit board 121 at intervals. The coil 15 is electrically connected to a control unit 123 on the circuit board 121. The four coils 15 are arranged on the circuit board 121 in two rows and two columns at intervals. There is one magnet 16 for each coil 15 in position. The coil 15 is a circular coil 15, the magnet 16 is a circular magnet 16, and the shape of the two is matched, but the invention is not limited to the circular coil 15. As shown in fig. 5, a plurality of magnets 16 are provided on a bottom plate 17 at intervals. The coil 15 and magnet 16 cooperate to compensate for the pressing force required by the user to activate the push switch 122. In other embodiments, the number and positions of the coils 15 are not limited thereto. The coil 15 may also be disposed on the base 17 and the magnet 16 may be disposed on the circuit board 121, which cooperate to compensate for the pressing force required by the user to activate the key switch 122.

Specifically, when the user presses the touch panel 12, the control module 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 being attracted to or repelled from each other, and thus change the direction of the magnetic force to which the touch panel 12 is subjected. The control assembly 123 is also capable of adjusting 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 trigger the key switch 122 is compensated, so that the user experience is improved.

With continued reference 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 member, and 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 coupled to the mounting aperture 1124 by a fastener 18 (e.g., a screw).

In other embodiments, the base plate 17 and the housing 11 may be fixedly connected, for example, one of the housing 11 and the base plate 17 is provided with a clamping hole, and the other is provided with a clamping block, and the clamping hole and the clamping block are in clamping fit, so that the base plate 17 and the housing 11 are in fit connection.

Referring to fig. 2, 5 and 7 in combination, the base plate 17 is provided with a base plate through hole 172 penetrating itself. After the base plate 17 is assembled to the housing 11, the control assembly 123 is exposed from the base plate through hole 172. In this way, the heat dissipation of the devices on the circuit board 121 is facilitated, or the devices are connected to other components of the electronic device 100.

Referring to fig. 2 and 3 in combination, a plurality of balance bars 13 are spaced around the second opening 1121. Each balance bar 13 includes a main body portion 131 and support portions 132 connected to both ends of the main body portion 131. The body portion 131 and the support portion 132 are substantially cylindrical. The material of the balance bar 13 may be a metal having a high elastic modulus. The support portion 132 and the body portion 131 may be integrally formed to form a generally U-shaped rod. The second housing 112 has a plurality of clamping grooves 1125 surrounding the second opening 1121. The cross section of the slot 1125 is arc-shaped and is adapted to the main body 131. The main body 131 of each balance bar 13 is engaged in the engaging slot 1125 and can axially rotate in the engaging slot 1125 without being separated from the engaging slot 1125. The opposite sides of the clamping groove 1125 are further provided with a buckle 1122 to facilitate the clamping into the balance bar 13, so as to enhance the connection reliability of the balance bar 13 and the second housing 112, and prevent the balance bar 13 from falling out of the clamping groove 1125.

Referring to fig. 2 and 4 in combination, the stand 14 includes a main board portion 141 disposed corresponding to the touch panel 12, an extension portion 142 extending from the main board portion 141 beyond the touch panel 12, and a locking portion 143 extending from the extension portion 142 toward the housing 11. The material of the support 14 may be metal or plastic, but is not limited thereto. The main plate portion 141 is fixed to the touch panel 12. When the user presses the touch panel 12, the stand 14 can move up and down toward the bottom plate 17 together with the touch panel 12. The main plate 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 provided 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 touch pad assembly 10, which is beneficial to the light and thin of 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 142 of the bracket 14 is fastened to the main body 131 of the balance bar 13. The clamping portion 143 of the bracket 14 has a semicircular notch matching the shape of the supporting portion 132, and the supporting portion 132 is clamped to the clamping portion 143 and can rotate around the clamping portion 143. The touch panel 12 is pressed, the bracket 14 drives the balance bar 13 to rotate, and when one end of the balance bar 13 is pressed, the whole balance bar 13 rotates.

Referring to fig. 2 and 4 in combination, the extension portion 142 of the bracket 14 is provided with a relief hole 1421 penetrating therethrough, 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 escape hole 1421, and the support portion 132 is movable in the escape groove 1123 and the escape hole 1421. Due to the arrangement of the avoidance hole 1421 and the avoidance groove 1123, the balance bar 13 can have a large rotation space, so that the balance bar 13 can timely and efficiently transmit the pressing force to the key switch 122, the key switch 122 can be timely triggered, and the working performance of the electronic device 100 is more outstanding.

The balance lever 13 is used to transmit the pressing force received by the touch panel 12 to the key switch 122. The process of this pressing force transmission is specifically described below. For convenience of description, the supporting portions 132 defining opposite ends of the body portion 131 of the balance bar 13 are first and second supporting portions, respectively. When the touch pad 12 is pressed at the position corresponding to the first supporting portion, the position of the balance bar 13 adjacent to the first supporting portion is subjected to a downward and rotational force, so that the first supporting portion rotates around the set pivot of the clamping portion 143 (or a lever is formed at the clamping portion 143, the contact point between the clamping portion 143 and the first supporting portion is the set pivot of the clamping portion 143), the main body 131 of the balance bar 13 rotates in the clamping slot 1125, and the second supporting portion 132 at the other end of the balance bar 13 rotates around the clamping 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 whole touch pad 12 to move towards the bottom plate 17. When the key switch 122 contacts the protrusion 171 on the base 17, the key switch 122 is triggered, so that the electronic device 100 (e.g., a notebook computer) can perform a corresponding operation (e.g., clicking a mouse or inputting through the keyboard 30).

It should be noted that the switch triggering of the existing touch pad is mainly half-domain, that is, only a local area of the touch pad can trigger the switch. This causes inconvenience to the user's use operation. In this embodiment of the application, through setting up a plurality of balancing poles for the push force that optional position received on the touch pad all can be transmitted to key switch, can realize so that the whole world triggers the button, reinforcing user experience.

In addition, the existing touch pad has the problem that the triggering force and the triggering stroke of different positions are different. Specifically, the trigger force and the trigger stroke are small at the position close to the key switch, and the trigger force and the trigger stroke are large at the position far from the key switch, so that the experience is poor in the use hand feeling. In the embodiment of the application, the number of the balance bars is increased, so that the difference of trigger force and trigger travel at different positions can be reduced to a certain extent. Moreover, in this application embodiment, the balancing pole encircles the touch panel, because the balancing pole is located the outside of touch panel, but not balancing pole direct support is between touch panel and bottom plate, so make the setting of balancing pole have great space for to a certain extent, the size of balancing pole can be thick relatively, and then promotes the ability of balancing pole to pressing force transmission, so, can promote user experience degree to a certain extent.

In the embodiment of the application, the coil and the magnet are further arranged between the touch pad and the bottom plate so as to further improve the user experience degree, so that the overall trigger force and the trigger stroke of the touch pad 12 are basically consistent.

In this embodiment, the touch pad 12 is a moving member, the bottom plate 17 is a fixed member, one of the coil 15 and the magnet 16 is disposed on the touch pad 12, and the other is disposed on the bottom plate 17, when the coil 15 is energized, an attractive force or a repulsive force can be generated between the coil 15 and the magnet 16 to promote or block the movement of the touch pad 12 to the bottom plate 17, so as to compensate for the pressing force required by the user to trigger the key switch 122. In this manner, the user presses any position on the touch panel 12 to trigger the key switch 122, with approximately or the same pressing force.

As shown in fig. 8, when the user presses the edge area of the touch pad 12, the current to the coil 15 can be controlled to make the coil 15 and the magnet 16 in a mutually attracted state, the attractive force applied to the touch pad 12 can compensate the pressing force of the user, and the movement of the touch pad 12 to the bottom plate 17 is promoted, so that the actual pressing force of the user can be smaller than that when the coil 15 and the magnet 16 are not applied, and the effect of the same pressing force when the user presses the central position of the touch pad 12 is achieved. Moreover, the stroke of the pressing point is smaller when the peripheral area is pressed due to the action of the coil 15 and the magnet 16 than when the coil 15 and the magnet 16 are not in action.

In some embodiments, when the user presses the touch pad 12, the coil 15 and the magnet 16 may be controlled to be in a mutually-repulsive state during the process that the user's finger leaves the touch pad 12, so that the touch pad 12 can be quickly separated from the user's finger, and the user experience is enhanced.

In addition, in the embodiment of the 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 arranged in a scattered manner. When the circuit board senses the pressing position point of the user on the touch panel, the control component can adjust the electromagnetic intensity in the coils according to the pressing position of the user so as to compensate the pressing force of the user at different positions, so that the pressing force of the user on the touch panel at different positions can trigger the key switch is basically equal.

The conventional touch panel includes the following three types.

The first is to control the distance between the touch pad and the bottom plate by using scissors. However, because of the small size of the scissor legs, the distance that can be adjusted is limited, and the problems of unbalanced triggering force and triggering travel at different positions still exist. And the touch panel assembly of this application embodiment adopts a plurality of balancing poles to transmit the pressing force, and the balancing pole is located the outside of touch panel moreover, but the balancing pole direct support is between touch panel and bottom plate, so makes the setting of balancing pole have great space for to a certain extent, the size of balancing pole can be thick relatively, and then promotes the ability of balancing pole to pressing force transmission. In addition, in the embodiment of the application, the coil and the magnet are arranged, so that the pressing force at different positions can be further compensated, and the user experience degree is improved.

The second is to adopt a pressure sensing mode to release a pressure strain gauge below the touch pad, when a user presses the touch pad, the resistance of the strain gauge is changed, and when the user presses the touch pad to exceed a set value, a linear motor near the touch pad drives the touch pad to vibrate for feedback to the user. However, in this manner, for each produced touch panel module, because of different deformation amounts, the intrinsic electrical parameters of strain gauges corresponding to the same force are greatly different in production, so that it is required that each touch panel module needs to be calibrated one by one after assembly, and compensation parameters are determined, so that the influence on production efficiency is great, and when the strain gauges are greatly deformed in later use of a user, the pressing induction may deviate. The touch panel assembly of the embodiment of the application has lower realization cost of the balance rod, the coil and the magnet compared with the strain gauge, and is a repeated process, and is simpler to prepare compared with the strain gauge. In addition, the push-button switch adopts a dome sheet, and the pressure curve of the dome sheet is better than that of the vibration motor.

The third is to give the user a pressing feedback by means of piezoelectric ceramics. However, in this method, piezoelectric ceramics at different positions are pressed, vibration starts after feedback is received, and there is a problem of delay; in addition, the piezoelectric ceramics gives different vibration amounts to the different positions of the pressing, and gives different vibration feedback sensations to the user at the different positions, so that the user feels the pressing force Guan Bumin. With reference to analysis, the touch pad subassembly of this application embodiment based on button shell fragment and a plurality of balancing pole, combines coil and magnet to carry out electromagnetic compensation and adjusts, simple structure to can realize the whole area and press down, adjust through the supplementary compensation of coil and magnet moreover, can reach the effect that dynamics all around and centre are basically equivalent to the dynamics of pressing down, promote user experience.

The above embodiments are only for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A touch panel assembly, comprising:

a housing provided with an opening;

the touch panel is arranged on one side of the shell, at least part of the touch panel is exposed out of the opening, and the touch panel comprises a key switch;

the bottom plate is arranged on one side, far away from the shell, of the touch pad and is fixedly connected with the shell;

the balance rod is supported between the bracket and the shell, the balance rod comprises a main body part and supporting parts connected with two ends of the main body part, the bracket comprises clamping parts, the main body part is clamped with the shell, the supporting parts are rotatably connected with the clamping parts, and a plurality of balance rods are arranged around the opening at intervals; and

the touch panel comprises a touch panel, a bottom plate, a magnet and a coil, wherein the magnet and the coil are positioned between the touch panel and the bottom plate, one of the magnet and the coil is arranged on the touch panel, the other one of the magnet and the coil is arranged on the bottom plate, and the magnet and the coil can be mutually attracted or mutually repulsed under the action of electric power so as to compensate the pressing force capable of triggering the key switch at different positions of the touch panel.

2. The touch panel assembly of claim 1, wherein the bracket is provided with a bracket through hole therethrough, the magnet being at least partially housed within the coil via the bracket through hole.

3. The touch panel assembly of claim 1 or 2, wherein the housing includes a slot, the body portion being snapped into the slot.

4. A touchpad assembly as claimed in any of claims 1 to 3 wherein the housing includes a relief slot in which the support portion is movable.

5. The touch panel assembly according to any one of claims 1 to 4, wherein the bracket includes a main plate portion provided corresponding to the touch panel and an extension portion extending from the main plate portion beyond the touch panel, the bracket through hole is provided on the main plate portion, and the engaging portion extends from the extension portion toward the housing direction.

6. The touch panel assembly of claim 5, wherein the balance bar is disposed between the extension and the housing.

7. A touchpad assembly as claimed in claim 5 or claim 6 wherein the extension is provided with a relief aperture therethrough, the support being movable within the relief aperture.

8. The touch panel assembly of any one of claims 1 to 7, wherein a plurality of said magnets are spaced apart and a plurality of said coils are spaced apart, one for each of said magnets.

9. The touch panel assembly of any one of claims 1 to 8, wherein the coil is disposed on the touch panel and the magnet is disposed on the base plate.

10. The touch pad assembly of any one of claims 1 to 9, wherein the key switch is a key dome, and the base plate includes a protrusion disposed in correspondence with the key dome and capable of triggering the key dome.

11. The touch panel assembly of any one of claims 1 to 10, wherein the key switch is disposed in a middle portion of the touch panel.

12. The touch panel assembly of any one of claims 1 to 11, further comprising a control assembly, the backplane being provided with a backplane through-hole therethrough, the control assembly being exposed from the backplane through-hole.

13. An electronic device comprising a touch pad assembly according to any one of claims 1 to 12.