CN115016599A

CN115016599A - Touch panel assembly and electronic device

Info

Publication number: CN115016599A
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: 2022-09-06
Anticipated expiration: 2041-11-04
Also published as: CN115016599B

Abstract

The embodiment of the application provides a touch panel assembly and an electronic device. The touch pad assembly includes a housing, a touch pad, a base plate, a support, 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 to the shell. The support sets up between bottom plate and touch pad and can be close to or keep away from the motion of bottom plate under the drive of touch pad. The balancing pole supports between support and casing, and the balancing pole joint is in the casing and rotate to be connected in the support. One of the magnet and the coil is disposed on the touch panel, and the other is disposed on the base plate. The magnet and the coil can attract or repel each other under the action of electricity. The pressing force degrees of different pressing positions of the touch pad assembly are basically equal, 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

At present, when a user presses a touch pad of electronic equipment (such as a notebook computer), pressing forces required by triggering a key switch at different positions are different, and 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 pad is arranged on one side of the shell, at least part of the touch pad is exposed out of the opening, and the touch pad comprises a key switch;

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

the support is arranged between the bottom plate and the touch pad and can move close to or away from the bottom plate under the driving of the touch pad;

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

the magnetic body and the coil are positioned between the touch pad and the bottom plate, one of the magnetic body and the coil is arranged on the touch pad, the other of the magnetic body and the coil is arranged on the bottom plate, and the magnetic body and the coil can attract or repel each other under the action of electric force.

The touch panel assembly of this application embodiment adopts the balancing pole to transmit pressing force, and when pressing the touch pad, the support can be under the drive of touch pad and be close to or keep away from the motion of bottom plate, and then the support can drive the balancing pole and take place to rotate, makes the balancing pole transmit pressing force for key switch. In addition, the magnet and the coil can attract or repel each other under the action of electric power, so that the attraction force or the repulsion force between the coil and the magnet can promote or block the relative movement of the touch pad and the bottom plate, the pressing force of the key switch triggered by different positions of a user is further compensated, the effect that the pressing force degrees of different positions of the touch pad are basically identical is achieved, and the user experience is improved.

In some embodiments, the holder is provided with a holder through-hole extending therethrough, and the magnet is at least partially received within the coil through the holder through-hole. Therefore, the thickness of the whole touch pad assembly can be reduced, and the whole electronic equipment using the touch pad assembly is light and thin.

In some embodiments, the housing includes a slot, and the body portion is engaged with 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 slot are further provided with buckles so as to be clamped into the balance bar, so that the reliability of connection between the balance bar and the second shell is enhanced, and the balance bar is prevented from falling off from the slot.

In some embodiments, the housing includes an escape slot in which the support portion is movable. Due to the arrangement of the avoiding groove, the balancing rod has a large rotating space, so that the balancing rod can timely and efficiently transmit 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 the mainboard portion that corresponds the touch pad setting and extends the extension that surpasss the touch pad from the main board portion, and the support through-hole sets up on the main board portion, and joint portion extends towards the casing direction from the extension. The main board part is fixed on the touch pad, and when a user presses the touch pad, the support can move up and down towards the bottom board along with the touch pad.

In some embodiments, a stabilizer bar is disposed between the extension and the housing. The extension part is buckled on the main body part of the balancing pole. So, press the touch pad, the support drives the balancing pole and takes place to rotate, and when the one end of pressing the balancing pole, the rotation all takes place for whole balancing pole.

In some embodiments, the extension portion is provided with an avoidance hole penetrating through the extension portion, and the support portion can move in the avoidance hole. Due to the arrangement of the avoiding hole, the balance bar can have a large rotating space, so that the balance bar can timely and efficiently transmit 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 pad, and because the balance bar is positioned on the outer side of the touch pad, the balance bar is not directly supported between the touch pad and the bottom plate, so that the balance bar is arranged in a larger space. To a certain extent, the size of the balancing rod can be relatively thick, and the capability of the balancing rod for transmitting the pressing force is further improved. Therefore, the user experience 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 pad assembly is provided with the plurality of coils and the plurality of magnets, and the plurality of coils and the plurality of magnets are arranged in a dispersed manner, when the circuit board senses a pressing position point of a user on the touch pad, the control assembly can adjust the electromagnetic intensity of 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 touch pad at different positions, which can trigger the key switch, is basically equal.

In some embodiments, the coil is disposed on the touch plate 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 attracted or mutually repelled state, and further the direction of the 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 dome, and the bottom plate includes a protrusion disposed corresponding to the key dome and capable of triggering the key dome. When the key elastic sheet contacts with the bulge on the bottom plate, the key elastic sheet is pressed by the bulge, the middle part of the key elastic sheet is concave, and the middle part of the key elastic sheet is contacted with a circuit on the circuit board to form a loop, 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 input of a keyboard or mouse click).

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

In some embodiments, the touch panel further comprises a control member, the bottom plate is provided with a bottom plate through hole penetrating through the bottom plate, and the control member is exposed from the bottom plate through hole. Therefore, the heat dissipation of the 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 coupled to the mounting hole by a fastener (e.g., a screw). In other embodiments, the bottom plate and the housing may be fixedly connected with each other, for example, in the housing and the bottom plate, one of the bottom plate and the housing is provided with a clamping hole, and the other one of the bottom plate and the housing is provided with a clamping block, and the clamping hole and the clamping block are in clamping fit with each other, so that the bottom plate and the housing are connected in a fit manner.

The second aspect of the present application provides an electronic device, which includes the touch panel assembly described above. Electronic equipment is notebook computer for example, because it includes foretell touch-sensitive panel subassembly, it can realize the universe and press, and can reach the effect that the pressing force degree is equal basically of dynamics all around and middle, has better user experience.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

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 an assembled schematic view of the housing, touch pad, coil and balance bar in some embodiments of the present application.

Fig. 4 is an assembled schematic view of the housing, touch pad, coil, balance bar, and support in some embodiments of the present application.

Fig. 5 is a schematic view 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 pad assembly according to some embodiments of the present disclosure.

FIG. 7 is a schematic illustration of a back side of a touch pad assembly in some embodiments of the present application.

Fig. 8 is a schematic diagram illustrating a structure in which a touch member is pressed according to some embodiments of the present disclosure.

Description of the main element symbols:

electronic device 100

Display screen 20

Keyboard 30

Touch panel assembly 10

Housing 11

Opening 111a

First case 111

First opening 1111

Second housing 112

Second opening 1121

Fastener 1122

Avoidance groove 1123

Mounting holes 1124

Neck 1125

Touchpad 12

Circuit board 121

Key switch 122

Control assembly 123

Chip 1231

Connector 1232

Adhesive layer 124

Operation layer 125

Balance bar 13

Main body 131

Supporting part 132

Support 14

Main plate part 141

Bracket through hole 1411

Extension 142

Dodge hole 1421

Clamping part 143

Coil 15

Magnet 16

Base plate 17

Projection 171

Bottom plate through hole 172

Mounting portion 173

Fastener 18

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "secured 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 as used herein are 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 present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application are described in detail. In the following embodiments, features of the embodiments may be combined with each other without conflict.

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 20, a keypad 30, and a touchpad assembly 10. The touch panel assembly 10 may control the electronic device 100 in place of a mouse to improve portability of the electronic device 100, or the touch panel assembly 10 may work in conjunction with a mouse.

Fig. 2 is an exploded view 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 bottom plate 17, a coil 15, a magnet 16, and a fastener 18.

The housing 11 serves to fix the balancing bar 13 and the base plate 17. The touch pad 12 is located at one side of the housing 11. The bottom plate 17 is disposed on a side of the touch panel 12 away from the housing 11. The support 14 is located between the touchpad 12 and the base 17. The balance bar 13 is located between the base plate 17 and the housing 11. The balance bar 13 is pivotally connected to the housing 11 and is snap-fitted to the bracket 14. The support 14 is a moving member, which is fixed to the touch pad 12 and can move close to or away from the bottom plate 17 under the driving of the touch pad 12. The stabilizer bar 13 is supported between the bracket 14 and the housing 11 and is rotatable about a set fulcrum of the bracket 14. The touch pad 12 comprises a key switch 122, when the touch pad 12 is pressed, the touch pad 12 drives the bracket 14 to move towards the bottom plate 17, so that the bracket 14 drives the balance bar 13 to rotate around a set pivot of the bracket 14, and the pressing force borne by the touch pad 12 is transmitted to the key switch 122. The magnet 16 and coil 15 are located between the touchpad 12 and the backplane 17. The magnet 16 and the coil 15 can attract or repel each other, thereby compensating for the pressing force required to activate the key switch 122. This touch pad subassembly 10 can reach the equal degree of pressure of universe through supplementary compensation adjustment of electromagnetism, promotes 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 opens at substantially the middle of the first housing 111. The second opening 1121 is opened at substantially the middle of the second housing 112. The first opening 1111 and the second opening 1121 are substantially rectangular. The second opening 1121 corresponds in position and communicates with the first opening 1111, together forming the opening 111a shown in fig. 6. In some embodiments, the size of the second opening 1121 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 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 are made of plastic or metal.

As shown in fig. 2, the touch panel 12 is provided on one side of the housing 11. The size of the touchpad 12 is approximately 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 housing 11. After the touch pad 12 is assembled to the housing 11, at least a portion of the touch pad 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, key switches 122, a control member 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 performing touch and/or press operations.

The key switches 122 and the control assembly 123 are located on the circuit board 121 and face the base plate 17. The key switches 122 are disposed in the middle of the touch panel 12, but are not limited thereto. In some embodiments, the key switch 122 is a key dome (also called 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 spring contacts the protrusion 171 of the bottom plate 17, the button spring is pressed by the protrusion 171, the middle portion of the button spring is recessed, and the middle portion of the button spring contacts the circuit on the circuit board 121 to form a loop, 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., an input of the keyboard 30 or a mouse click).

The control assembly 123 includes a chip 1231 and a connector 1232, which are electrically connected, and the connector 1232 may be a Flexible Flat Cable (FFC) connector 1232. The chip 1231 and the connector 1232 are electrically connected to the circuit board 121 to cooperatively recognize a touch and/or pressing operation.

The operation layer 125 is located on a side of the circuit board 121 close to the housing 11, and the operation layer 125 is a film layer for receiving a touch and/or pressing operation of a user. The operation layer 125 can protect the circuit board 121 located thereunder and components thereof located on the circuit board 121. In addition, 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 is directly contacted by the user's 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 handle layer 125. In some embodiments, the material of the adhesive layer 124 is a double-sided tape, but is not limited thereto. As shown in fig. 2, the plurality of coils 15 are fixed to the circuit board 121 at intervals. The coil 15 is electrically connected to the control element 123 on the circuit board 121. The four coils 15 are spaced in two rows and two columns on the circuit board 121. In position, there is one magnet 16 for each coil 15. The coil 15 is a circular coil 15, and the magnet 16 is a circular magnet 16, which are adapted to each other, but not limited thereto. 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 trigger the key switch 122. In other embodiments, the number and position of the coils 15 are not limited thereto. And the coil 15 may also be disposed on the base plate 17 and the magnet 16 disposed on the circuit board 121, which cooperate to compensate for the pressing force required by the user to trigger the key switch 122.

Specifically, when the user presses the touch panel 12, the control unit 123 can change the direction of the magnetic field received by the touch panel 12 by adjusting the direction of the current applied to the coil 15, changing the direction of the magnetic field of the coil 15, and bringing the magnet 16 and the coil 15 into a state of attraction or repulsion with each other. The control assembly 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. Therefore, the pressing force required by the user to trigger the key switch 122 is compensated, and the user experience is improved.

With continued reference to fig. 2, if the housing 11 is defined as the uppermost layer of the touch pad assembly 10, then the bottom plate 17 is the lowermost layer of the touch pad assembly 10. The bottom plate 17 is a fixed 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 hole 1124 by a fastener 18, such as a screw.

In other embodiments, the bottom plate 17 and the housing 11 may also be fixedly connected by other manners, such as the housing 11 and the bottom plate 17, one of which is provided with a clamping hole, and the other of which is provided with a clamping block, and the clamping hole and the clamping block are in clamping fit, so as to realize the fit connection between the bottom plate 17 and the housing 11.

Referring to fig. 2, 5 and 7, the bottom plate 17 is provided with a bottom plate through hole 172 penetrating through itself. When the base plate 17 is assembled to the housing 11, the control member 123 is exposed from the base plate through hole 172. Thus, heat dissipation of devices on the circuit board 121 is facilitated, or the devices are connected with 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 stabilizer bar 13 includes a body portion 131 and support portions 132 connected to both ends of the body portion 131. The body portion 131 and the support portion 132 are substantially cylindrical. The material of the stabilizer 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 bar. The second housing 112 has a plurality of locking slots 1125 around the second opening 1121. The cross-section of the locking groove 1125 is arc-shaped and is matched with the main body 131. The body portion 131 of each stabilizer bar 13 is engaged in the engaging groove 1125 and can rotate axially in the engaging groove 1125 but is disengaged from the engaging groove 1125. Buckles 1122 are further disposed on two opposite sides of the slot 1125 to be conveniently buckled into the balance bar 13, so as to enhance the connection reliability between the balance bar 13 and the second housing 112, and to prevent the balance bar 13 from falling from the slot 1125.

Referring to fig. 2 and 4, the bracket 14 includes a main plate portion 141 corresponding to the touch pad 12, an extending portion 142 extending from the main plate portion 141 and beyond the touch pad 12, and a clamping portion 143 extending from the extending portion 142 and toward the housing 11. The material of the bracket 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 touchpad 12, the support 14 is able to move up and down with the touchpad 12 toward the base plate 17. 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, and the coil 15 disposed on the circuit board 121 are exposed through the through hole 1411. In some embodiments, the magnet 16 is at least partially received in the coil 15 through the through hole 1411, so as to reduce the thickness of the entire touchpad assembly 10, which is beneficial to the overall slimness and thinness of the electronic device 100.

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 snapped onto the body 131 of the stabilizer bar 13. The clamping portion 143 of the bracket 14 has a semicircular notch matched with the shape of the supporting portion 132, and the supporting portion 132 is clamped in the clamping portion 143 and can rotate around the clamping portion 143. When the touch pad 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, the extending portion 142 of the bracket 14 is provided with an avoiding hole 1421 penetrating through itself, and the second housing 112 is provided with an avoiding groove 1123 communicating with the second opening 1121. The avoiding groove 1123 is communicated with the avoiding hole 1421, and the supporting portion 132 can move in the avoiding groove 1123 and the avoiding hole 1421. Due to the arrangement of the avoidance hole 1421 and the avoidance groove 1123, the balance bar 13 has 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 bar 13 is used to transmit the pressing force applied to the touch panel 12 to the key switches 122. The process of transmitting the pressing force will be described in detail below. For convenience of description, the supporting portions 132 defining opposite ends of the body portion 131 of the stabilizer bar 13 are a first supporting portion and a second supporting portion, respectively. When the position of the touch pad 12 corresponding to the first support portion is pressed, the position of the balance bar 13 adjacent to the first support portion is subjected to downward and rotational force, so that the first support portion is driven by the bracket 14 to rotate around the set fulcrum of the clamping portion 143 (or a lever is formed at the clamping portion 143, the contact point of the clamping portion 143 and the first support portion is the set fulcrum of the clamping portion 143), the main body portion 131 of the balance bar 13 rotates in the clamping groove 1125, and the second support portion 132 at the other end of the balance bar 13 rotates around the clamping portion 143 of the bracket 14. Thus, 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 touch pad 12 to move toward the bottom plate 17. When the key switch 122 contacts the protrusion 171 on the bottom plate 17, the key switch 122 is triggered, so that the electronic device 100 (e.g., a notebook computer) performs a corresponding operation (e.g., clicking a mouse or inputting via the keyboard 30).

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

In addition, the existing touch pad has the problem that the trigger force and the trigger stroke at different positions are different. Specifically, the position that is close to key switch triggers power and trigger stroke little, and the position that is far away from key switch triggers power and trigger stroke big for use feeling, experience is not good. In the embodiment of the application, the difference of the trigger force and the trigger stroke at different positions can be reduced to a certain extent by increasing the number of the balance rods. Moreover, in this application embodiment, the balancing pole encircles the touch pad, because the balancing pole is located the outside of touch pad, and not the balancing pole directly supports between touch pad 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 done thick relatively, and then promotes the balancing pole to the ability of pressing force transmission, so, can promote user experience degree to a certain extent.

In consideration of the limitation of system space, the infinite thickness of the balance bar, and the influence of material modulus, the influence of assembly gap, etc. of the balance bar, the embodiment of the present application further improves the user experience by providing the coil and the magnet between the touch pad and the bottom plate, so as to achieve substantially uniform trigger force and trigger stroke across the entire area of the touch pad 12.

In the embodiment of the present application, the touch panel 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 panel 12, and the other is disposed on the bottom plate 17, so that 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 hinder the movement of the touch panel 12 to the bottom plate 17, and compensate for the pressing force required by the user to trigger the key switches 122. In this manner, the user presses any position of the touch panel 12 to activate the key switches 122, and the pressing force is similar or the same.

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

In some embodiments, when the user presses the touch pad 12 and the user's finger leaves the touch pad 12, the coil 15 and the magnet 16 may be controlled to be in a mutually repulsive state, so that the touch pad 12 may be quickly separated from the user's finger, thereby enhancing 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 a pressing position point of a user on the touch pad, the control assembly can adjust the electromagnetic intensity of the coils according to the pressing position of the user so as to compensate the pressing intensity of the user at different positions, and the pressing force of the touch pad at different positions, which can trigger the key switches, is basically equal.

Note that the conventional touch panel includes the following three types.

The first is to use the scissor feet to control the distance between the touch pad and the bottom plate. However, due to the small size of the scissor feet, the distance that can be adjusted is limited, and the problem of unbalance of the trigger force and trigger stroke at different positions still exists. The touch panel assembly of the embodiment of the application adopts the plurality of balance bars to transfer the pressing force, the balance bars are located on the outer side of the touch panel instead of the balance bars directly supported between the touch panel and the bottom plate, so that the balance bars are arranged in a large space, the size of the balance bars can be relatively thick to a certain extent, and the capability of the balance bars for transferring the pressing force is further improved. In addition, in the embodiment of the application, the arrangement of the coil and the magnet can further compensate the pressing force at different positions, and the user experience is improved.

The second is to adopt a pressure sensing mode, a pressure strain gauge is arranged below the touch pad, when a user presses the touch pad, the resistance value of the strain gauge changes, and when the user presses a pressure value exceeding a set value, a linear motor near the touch pad drives the touch pad to vibrate to give feedback to the user. However, in this way, for each touch panel module produced, because the deformation amount is different, during production, the inherent electrical parameters of the strain gauge corresponding to the same force are greatly different, so that each touch panel module needs to be calibrated one by one after being assembled, and parameters are compensated, so that the influence on the production efficiency is large, and when a large deformation occurs in later use of a user, the press sensing may have a deviation. The touch panel assembly of the embodiment of the application has the advantages that the implementation cost of the balance rod, the coil and the magnet is lower than that of the strain gauge, and the implementation cost is a repetitive process and is simpler than that of the strain gauge. In addition, the button switch adopts a snap dome, and the pressure curve of the button switch is better than that of a vibrating motor.

And thirdly, a piezoelectric ceramic mode is adopted to give a user pressing feedback. However, in this method, when the piezoelectric ceramics at different positions are pressed, the piezoelectric ceramics start to vibrate after receiving feedback, which causes a problem of time delay; in addition, when different positions are pressed, the vibration quantity given by the piezoelectric ceramics is different, the vibration feedback feeling of different positions for a user is different, and the user feels that the switch is not sensitive to pressing. The touch panel assembly of the embodiment of the application is simple in structure, can realize global pressing, can achieve the effect of basically equivalent force and middle pressing force degree through auxiliary compensation adjustment of the coil and the magnet, and improves user experience.

Although the present application has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the present application.

Claims

1. A touch pad assembly, comprising:

a housing provided with an opening;

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

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

the magnetic body and the coil are positioned between the touch pad and the bottom plate, one of the magnetic body and the coil is arranged on the touch pad, the other of the magnetic body and the coil is arranged on the bottom plate, and the magnetic body and the coil can attract or repel each other under the action of electric power.

2. The touch pad assembly of claim 1, wherein the holder is provided with a holder through-hole therethrough, the magnet being at least partially received within the coil through the holder through-hole.

3. A touch pad assembly according to claim 1 or claim 2, wherein the housing includes a slot in which the body portion is snapped.

4. The touch pad assembly of any of claims 1-3, wherein the housing includes an escape slot in which the support portion is movable.

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

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

7. The touch pad assembly of claim 5 or 6, wherein the extension portion is provided with an escape hole therethrough, in which the support portion is movable.

8. The touch pad assembly of any one of claims 1-7, wherein a plurality of the balance bars are spaced around the opening.

9. The touch pad assembly of any of claims 1-8, wherein a plurality of the magnets are spaced apart and a plurality of the coils are spaced apart, one for each of the magnets.

10. The touchpad assembly of any of claims 1-9, wherein the coil is disposed on the touchpad and the magnet is disposed on the backplane.

11. The touch pad assembly according to any one of claims 1 to 10, wherein the key switch is a key dome, and the bottom plate includes a protrusion disposed corresponding to the key dome and capable of triggering the key dome.

12. The touch pad assembly according to any one of claims 1 to 11, wherein the key switches are disposed at a middle portion of the touch pad.

13. The touch pad assembly of any one of claims 1-12, wherein the touch pad further comprises a control assembly, the backplane being provided with a backplane through hole therethrough, the control assembly being exposed from the backplane through hole.

14. An electronic device characterized by comprising the touch panel assembly according to any one of claims 1 to 13.