阅读说明：本技术 一种按键结构及其键盘 (Key structure and keyboard thereof ) 是由 张文 徐锋 魏新 曹进 尤大为 吕兵 李泽峰 王世超 于 2021-08-25 设计创作，主要内容包括：本申请提供一种按键结构及其键盘,按键结构包括键帽、弹性体、剪刀脚支架、压阻薄膜传感器以及底板；压阻薄膜传感器设置在底板上,剪刀脚支架和弹性体设置于键帽和压阻薄膜传感器之间,压阻薄膜传感器包括第一压力感应区域和第二压力感应区域,弹性体与第一压力感应区域对应,剪刀脚支架与第二压力感应区域对应,以使在键帽被按压产生压力时,弹性体的向下压力作用于第一压力感应区域,剪刀脚支架的向下压力作用于第二压力感应区域。(The application provides a key structure and a keyboard thereof, wherein the key structure comprises a keycap, an elastic body, a scissor-foot support, a piezoresistive film sensor and a bottom plate; the pressure drag film sensor sets up on the bottom plate, scissors foot support and elastomer set up between key cap and pressure drag film sensor, pressure drag film sensor includes that first forced induction is regional and second forced induction is regional, the elastomer corresponds with first forced induction is regional, scissors foot support corresponds with second forced induction is regional, so that when the key cap is pressed production pressure, the downward pressure of elastomer acts on first forced induction is regional, the downward pressure of scissors foot support acts on second forced induction is regional.)

1. A key structure is characterized by comprising a key cap, an elastic body, a scissor-foot support, a piezoresistive film sensor and a bottom plate;

the piezoresistive film sensor is arranged on the bottom plate, the scissor-foot support and the elastic body are arranged between the key cap and the piezoresistive film sensor, the piezoresistive film sensor comprises a first pressure sensing area and a second pressure sensing area, the elastic body corresponds to the first pressure sensing area, and the scissor-foot support corresponds to the second pressure sensing area, so that when the key cap is pressed to generate pressure, the downward pressure of the elastic body acts on the first pressure sensing area, and the downward pressure of the scissor-foot support acts on the second pressure sensing area.

2. The key structure of claim 1, wherein the scissor-leg support comprises an inner scissor leg and an outer scissor leg, wherein the inner scissor leg and the outer scissor leg are pivotally connected at a middle portion thereof, wherein a first edge of each of the inner scissor leg and the outer scissor leg is connected to the piezoresistive film sensor, wherein a second edge of each of the inner scissor leg and the outer scissor leg is connected to the key cap, and wherein the first edge and the second edge are opposite.

3. The key structure of claim 2, wherein the second sensing area corresponds to a second edge of the inner scissor legs and the outer scissor legs.

4. The key structure of claim 3, wherein the second sensing area comprises a first elongated sensing area corresponding to a second edge of the inner scissor leg and a second elongated sensing area corresponding to a second edge of the outer scissor leg.

5. The key structure according to claim 3, wherein the outer scissor leg and the inner scissor leg are both quadrilateral brackets, the second sensing area comprises a first contact sensing area, a second contact sensing area, a third contact sensing area and a fourth contact sensing area, and two edge angles of a second edge of the outer scissor leg respectively correspond to the first contact sensing area and the second contact sensing area; two edge angles of the second edge of the inner scissor foot respectively correspond to the third contact sensing area and the fourth contact sensing area.

6. The key structure of claim 5, wherein the inner scissor legs comprise a hollow, the elastomer being disposed between the piezoresistive film sensor and the keycap through the hollow of the inner scissor legs.

7. The key structure of claim 1, further comprising a thin film circuit layer disposed on the piezoresistive thin film sensors for transmitting pressure of the elastomer and scissor-leg supports to the piezoresistive thin film sensors.

8. The key structure according to claim 1, wherein the elastic body comprises a top portion, a ring wall, a conductive via and a bottom portion, the two ends of the ring wall are respectively connected with the top portion and the bottom portion and form a built-in space in the ring wall, the conductive via is located in the built-in space and is arranged between the top portion and the bottom portion, a first end of the conductive via is connected with the top portion, an opposite end of the first end of the conductive via is spaced from the bottom portion by a preset distance, and the bottom portion is connected with the first pressure sensing area.

9. The key structure according to claim 8, wherein a recessed space is defined in the top, the recessed space includes a first sidewall, a second sidewall and a recessed bottom wall, the first sidewall and the second sidewall are respectively connected to the recessed bottom wall, and an included angle formed between the first sidewall and the recessed bottom wall is an obtuse angle.

10. A keyboard comprising a key structure according to any one of claims 1 to 9.

Technical Field

The application relates to the technical field of key structure design, in particular to a key structure and a keyboard thereof.

Background

The pressure sensing keyboard structure is characterized in that a pressure sensing module is additionally arranged below keys and used for sensing the pressure of a plurality of keys pressed by a user and feeding back and outputting a corresponding signal instruction according to the stress of the sensing module.

At present, the existing pressure sensing key is only dependent on a silica gel elastomer in the key to apply force to a pressure sensing module to carry out pressure detection, so that the pressure of a user on the key cannot be accurately reflected by the design of only depending on the silica gel elastomer as a force application point, and the accuracy of the contact pressure detected by the pressure sensing module is lower.

Disclosure of Invention

An object of the embodiments of the present application is to provide a key structure and a keyboard thereof, so as to solve the above problems.

In a first aspect, the present invention provides a key structure, comprising a key cap, an elastic body, a scissor-foot support, a piezoresistive film sensor, and a base plate; the piezoresistive film sensor is arranged on the bottom plate, the scissor-foot support and the elastic body are arranged between the key cap and the piezoresistive film sensor, the piezoresistive film sensor comprises a first pressure sensing area and a second pressure sensing area, the elastic body corresponds to the first pressure sensing area, and the scissor-foot support corresponds to the second pressure sensing area, so that when the key cap is pressed to generate pressure, the downward pressure of the elastic body acts on the first pressure sensing area, and the downward pressure of the scissor-foot support acts on the second pressure sensing area.

In the button structure of above-mentioned design, this scheme not only sets up first forced induction region on the pressure drag film sensor that the elastomer corresponds, still set up the pressure that the scissors foot support received through pressure drag film sensor that the second forced induction region detected, make the pressure that pressure drag film sensor detected be the combination of the pressure of scissors foot support and the pressure of elastomer, and the outside effort that the appearance key cap received that the combination of the pressure of scissors foot support and the pressure of elastomer can be fine, therefore, the design of this application scheme makes pressure drag film sensor can detect more obvious and the change of accurate power, and then promote the rate of accuracy that pressure drag film sensor detected discernment atress size.

In an alternative embodiment of the first aspect, the scissor-foot support comprises an inner scissor foot and an outer scissor foot, the middle of the inner scissor foot and the middle of the outer scissor foot are rotatably connected, a first edge portion of each of the inner scissor foot and the outer scissor foot is connected to the piezoresistive film sensor, and a second edge of each of the inner scissor foot and the outer scissor foot is connected to the keycap, wherein the first edge and the second edge are opposite.

In an alternative embodiment of the first aspect, the second sensing region corresponds to a second edge of the inner scissor legs and the outer scissor legs.

In an alternative embodiment of the first aspect, the second sensing area includes a first elongated sensing area corresponding to the second edge of the inner scissor leg and a second elongated sensing area corresponding to the second edge of the outer scissor leg.

In an optional implementation manner of the first aspect, the outer scissor leg and the inner scissor leg are both quadrilateral brackets, the second sensing area includes a first contact sensing area, a second contact sensing area, a third contact sensing area and a fourth contact sensing area, and two edge angles of a second edge of the outer scissor leg respectively correspond to the first contact sensing area and the second contact sensing area; two edge angles of the second edge of the inner scissor foot respectively correspond to the third contact sensing area and the fourth contact sensing area.

In an alternative embodiment of the first aspect, the inner scissor legs comprise a hollow, the elastomer being disposed between the piezoresistive film sensor and the keycap through the hollow of the inner scissor legs.

In an alternative embodiment of the first aspect, the key structure further comprises a thin film circuit layer disposed on the piezoresistive thin film sensor for transmitting the pressure of the elastomer and the scissor-foot support to the piezoresistive thin film sensor.

In an optional implementation manner of the first aspect, the elastic body includes a top portion, a ring wall, a conduction column and a bottom portion, two ends of the ring wall are respectively connected to the top portion and the bottom portion, and a built-in space is formed in the ring wall, the conduction column is located in the built-in space and is arranged between the top portion and the bottom portion, a first end of the conduction column is connected to the top portion, an opposite end of the first end of the conduction column is spaced from the bottom portion by a preset distance, and the bottom portion is connected to the first pressure sensing area.

In an optional implementation manner of the first aspect, a recessed space is formed in the top, the recessed space includes a first side wall, a second side wall and a recessed bottom wall, the first side wall and the second side wall are respectively connected to the recessed bottom wall, and an included angle formed by the first side wall and the second side wall and the recessed bottom wall is an obtuse angle.

In a second aspect, the present invention provides a keyboard comprising a key structure according to any one of the preceding embodiments.

In the keyboard of above-mentioned design, because the keyboard comprises the key structure in the first embodiment, therefore, this keyboard not only sets up first pressure sensing region on the piezoresistive film sensor that the elastomer corresponds, still set up the pressure that the scissors foot support received through piezoresistive film sensor second pressure sensing region, make the pressure that the piezoresistive film sensor detected be the combination of the pressure of scissors foot support and the pressure of elastomer, and the external acting force that the key cap received can be fine reflected in the combination of the pressure of scissors foot support and the pressure of elastomer, consequently, the design of this application scheme makes the piezoresistive film sensor can detect more obvious and the change of accurate power, and then promote the accuracy rate that the piezoresistive film sensor detected discernment atress size.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application 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 that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a first structural schematic diagram of a key structure provided in an embodiment of the present application;

fig. 2 is a second schematic structural diagram of a key structure according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a scissor-foot support according to an embodiment of the present disclosure;

fig. 4 is a third structural schematic diagram of a key structure provided in the embodiment of the present application;

fig. 5 is a fourth schematic structural diagram of a key structure provided in the embodiment of the present application;

FIG. 6 is a schematic structural diagram of an elastomer provided in an embodiment of the present application;

fig. 7 is a fifth structural schematic diagram of a key structure according to an embodiment of the present application.

Icon: 10-a keycap; 20-an elastomer; 201-top; 2011-recessed space; 20111-a first side wall; 20112-second side wall; 20113-concave bottom; 202-a ring wall; 203-a conductive via; 204-bottom; 205-built-in space; 30-scissor leg support; 301-inner scissor legs; 302-outer scissor legs; 40-piezoresistive thin film sensors; 401 — a first pressure sensing region; 402-a second pressure sensing zone; 4021-a first elongated sensing area; 4022-a second sliver sensing area; 4023-first contact sensing area; 4024-a second contact sensing area; 4025-third contact sensing area; 4026-fourth contact sensing area; 50-a base plate; 60-thin film circuit layer.

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.

First embodiment

The embodiment of the present application provides a key structure, as shown in fig. 1 and 2, the key structure includes a key cap 10, an elastic body 20, a scissor-foot support 30, a piezoresistive film sensor 40, and a base plate 50, the piezoresistive film sensor 40 is disposed on the base plate 50, the scissor-foot support 30 and the elastic body 20 are disposed between the key cap 10 and the piezoresistive film sensor 40, the piezoresistive film sensor 40 includes a first pressure sensing area 401 and a second pressure sensing area 402, the elastic body 20 corresponds to the first pressure sensing area 401, and the scissor-foot support 30 corresponds to the second pressure sensing area 402.

In the key structure of the above design, when the key cap 10 receives an external pressure, for example, when the key cap 10 is pressed by a finger, the key cap 10 moves in a vertical direction relative to the base plate 50 through the scissor-foot support 30, the scissor-foot support 30 also moves along with the movement of the key cap 10 to contact the piezoresistive film sensor 40, and the scissor-foot support 30 corresponds to the second pressure sensing area 402, and under a sufficient pressure, the scissor-foot support 30 presses the second pressure sensing area 402 of the piezoresistive film sensor 40; meanwhile, as the key cap 10 moves vertically, the key cap 10 applies a force to the elastic body 20, the force causes the elastic body 20 to contact the piezoresistive film sensor 40, and as the elastic body 20 corresponds to the first pressure sensing area 401, the elastic body 20 applies a pressure to the first pressure sensing area 401 under a sufficient pressure, so that the piezoresistive film sensor 40 can detect the pressure from the scissor-leg support 30 and the pressure from the elastic body 20 through the first pressure sensing area 401 and the second pressure sensing area 402, and the piezoresistive film sensor 40 outputs an electrical signal corresponding to the pressure of the combination of the scissor-leg support 30 and the elastic body 20.

In above-mentioned design button structure, this scheme not only sets up first forced induction region on the pressure drag film sensor 40 that the elastomer corresponds, still set up the pressure that the scissors foot support received through pressure drag film sensor that the second forced induction region detected, make the pressure that pressure drag film sensor detected be the combination of the pressure of scissors foot support and the pressure of elastomer, and the outside effort that embodies key cap 10 and receive that the combination of the pressure of scissors foot support and the pressure of elastomer can be fine, therefore, the design of this application scheme makes pressure drag film sensor can detect more obvious and the change of accurate power, and then promote the rate of accuracy that pressure drag film sensor detected discernment atress size.

In an alternative embodiment of this embodiment, as shown in fig. 3, the scissor-foot support 30 comprises an inner scissor-foot 301 and an outer scissor-foot 302, the middle of the inner scissor-foot 301 and the outer scissor-foot 302 are pivotally connected, a first edge a1 of the inner scissor-foot 301 and a first edge B1 of the outer scissor-foot 302 are both connected to the piezoresistive film sensor 40, and a second edge a2 of the inner scissor-foot 301 and a second edge B2 of the outer scissor-foot 302 are both connected to the key cap 10, wherein the first edge and the second edge are opposite. When force is applied to the key cap 10, the key cap 10 applies pressure to the second edges a2 and B2 of the inner scissor legs 301 and the outer scissor legs 302, and the second edges a2 and B2 of the inner scissor legs 301 and the outer scissor legs 302 are gradually lowered to contact the piezoresistive film sensors 40 due to the rotational connection of the middle portions of the inner scissor legs 301 and the outer scissor legs 302.

Based on the structure of the scissor-leg bracket 30 designed above, the second pressure sensing region 402 may correspond to the second edge a2 of the inner scissor-leg 301 and the second edge B2 of the outer scissor-leg 302, such that when the second edges a2 of the inner scissor-leg 301 and the second edge B2 of the outer scissor-leg 302 are gradually lowered to contact the piezoresistive film sensors 40, the second edges a2 of the inner scissor-leg 301 and the second edges B2 of the outer scissor-leg 302 contact the second pressure sensing region 402, such that the second edges a2 of the inner scissor-leg 301 and the second edges B2 of the outer scissor-leg 302 generate pressure on the second pressure sensing region 402, and the pressure is detected by the piezoresistive film sensors 40.

As one possible implementation, as shown in fig. 4, the second sensing region 402 can include a first strip sensing region 4021 and a second strip sensing region 4022, the first strip sensing region 4021 corresponding to the second edge portion a2 of the inner scissor leg 301 and the second strip sensing region 4022 corresponding to the second edge portion B2 of the outer scissor leg 302, such that the pressure at the second edge a2 of the inner scissor leg 301 is detected by the piezoresistive film sensor 40 through the first strip sensing region 4021 and the pressure at the second edge B2 of the outer scissor leg 302 is detected by the piezoresistive film sensor 40 through the second strip sensing region 4022 times the piezoresistive film sensor 40.

As another possible implementation, as shown in fig. 5, the inner scissor leg 301 and the outer scissor leg 302 are both quadrilateral brackets, the second sensing region 402 may include a first contact sensing region 4023, a second contact sensing region 4024, a third contact sensing region 4025 and a fourth contact sensing region 4026, and two edge angles B21 and B22 of a second edge B2 of the outer scissor leg 302 correspond to the first contact sensing region 4023 and the second contact sensing region 4024, respectively; the two edge angles a21 and a22 of the second edge a2 of inner scissor leg 301 correspond to the third contact sensing region 4025 and the fourth contact sensing region 4026, respectively.

In an alternative embodiment of this embodiment, as shown in fig. 4, the outer scissors foot 302 and the inner scissors foot 301 have hollow parts, the inner scissors foot 301 is disposed in the hollow part of the outer scissors foot 302, the elastic body 20 is disposed in the hollow part of the inner scissors foot 301, and the shape of the hollow part of the outer scissors foot 302 can be adapted to the shape of the inner scissors foot 301; the shape of the hollow portion of the inner scissor leg 301 can be adapted to the shape of the elastic body 20.

In an alternative embodiment of this embodiment, as shown in fig. 6, the elastic body 20 may include a top portion 201, a circular wall 202, a conductive via 203 and a bottom portion 204, the circular wall 202 connects the top portion 201 and the bottom portion 204 at two ends respectively and forms an internal space 205 in the circular wall 202, the conductive via 203 is disposed in the internal space 205 of the circular wall 202, a first end of the conductive via 203 is connected to the top portion 201, an opposite end of the first end of the conductive via 203 is spaced from the bottom portion 204 by a predetermined distance, and the bottom portion 204 is connected to the first pressure sensing area 401.

In the elastic body 20 with the above design, the action force of the keycap 10 acts on the top portion 201 of the elastic body 20, and the top portion 201 receives the action force and drives the conductive via 203 in the annular wall 202 to move downwards, so that the conductive via 203 contacts the bottom portion 204 and generates a downward action force on the bottom portion 204 to generate a pressure on the first pressure sensing area 401 of the piezoresistive film sensor 40 connected to the bottom portion.

In an alternative embodiment of the present embodiment, on the basis of the elastic body 20 with the above design, as shown in fig. 6, a concave space 2011 may be further opened at the top 201 of the elastic body 20, the concave space 2011 includes a first side wall 20111, a second side wall 20112 and a concave bottom 20113, the first side wall 20111 and the second side wall 20112 are distributed at two ends of the concave bottom 20113 and are respectively connected to the concave bottom 20113, the first side wall 20111 and the second side wall 20112 respectively form an included angle with the concave bottom 20113, and the included angle formed by the two is an obtuse angle, that is, the angle is greater than 90 °.

The elastic body 20 of the above design, because the included angle in the designed concave space 2011 is an obtuse angle, when the elastic body 20 is deformed by pressure, the concave space 2011 of the top 201 can provide more buffer spaces for the conduction column 203 to move downwards, so that the downward stroke of the elastic body 20 gets rid of the space limitation of the notebook keyboard, and then additional conduction formation is added, and the elastic body 20 reaches the stroke end point in the specified stroke of the key.

The elastic body 20 designed above is elastically deformed by the action of the key cap 10, the top 201 of the elastic body 20 and the conductive pillar 203 gradually move downward, i.e. toward the first pressure sensing area 401 of the piezoresistive film sensor 40, due to the elasticity of the elastic body 20 and the limitation of the internal space of the keyboard, the second sidewall 20112 and the annular wall 202 are deformed correspondingly by the action of the force, and the annular wall 202 is therefore also contacted with the first pressure sensing area 401 of the piezoresistive film sensor 40, and when the external force is removed, the elastic body 20 is restored to the initial state by the elastic restoring force of the elastic body.

In an alternative embodiment of this embodiment, as shown in fig. 6, the bottom surface of the conductive pillar 203 of the elastic body 20 may be in an arc shape, and the arc-shaped conductive pillar 203 ensures that when a user taps a corner of the key cap, even if the conductive pillar 203 is subjected to an angular downward displacement with an angle, a sufficient contact area and a trigger force between the conductive pillar 203 and the first pressure sensing region 401 of the piezoresistive film sensor 40 can be ensured to generate an input signal, so that the designed elastic body 20 achieves an effect of stable input.

In an alternative embodiment of this embodiment, as shown in fig. 7, the key structure further includes a thin film circuit layer 60, the thin film circuit layer 60 is disposed on the piezoresistive thin film sensor 40, that is, when the thin film circuit layer 60 is provided, the elastic body 20 and the scissor-leg support 30 are disposed on the thin film circuit layer 60, the thin film circuit layer 60 can transmit the pressure generated by the elastic body 20 and the scissor-leg support 30 to the piezoresistive thin film sensor 40, and the thin film circuit layer 60 has a circuit therein, the circuit is connected to the piezoresistive thin film sensor 40, and the circuit can collect the resistance value converted from the pressure of the piezoresistive thin film sensor 40 and output a corresponding electrical signal.

Second embodiment

The present application provides a keyboard including a key structure in any one of the optional implementations in the first embodiment, and the description of the key structure is similar to that in the first embodiment and is not repeated here.

In the keyboard of above-mentioned design, because the keyboard comprises the key structure in the first embodiment, therefore, this keyboard not only sets up first pressure sensing region on the piezoresistive film sensor that the elastomer corresponds, still set up the pressure that the scissors foot support received through piezoresistive film sensor second pressure sensing region, make the pressure that the piezoresistive film sensor detected be the combination of the pressure of scissors foot support and the pressure of elastomer, and the external acting force that the key cap received can be fine reflected in the combination of the pressure of scissors foot support and the pressure of elastomer, consequently, the design of this application scheme makes the piezoresistive film sensor can detect more obvious and the change of accurate power, and then promote the accuracy rate that the piezoresistive film sensor detected discernment atress size.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.