TW201503192A - Keyswitch structure - Google Patents

Abstract

The invention discloses a keyswitch structure, which includes a base and a sheet electric actuator. A fixed end of the sheet electric actuator is fixed to the base, and a free end of the sheet electric actuator is simply support on the base, so that the sheet electric actuator is capable of being bent relative to the base elastically. The sheet electric actuator is capable of suffering an external force to deform to contact a sensor part of the base, so as to trigger vibration of the sheet electric actuator. The vibration is used as a feedback to a pressing action by a user, so that the user can identify by tactile sense whether the pressing action is effective.

Description

Button structure

The invention relates to a button structure, in particular to a button structure capable of generating vibration feedback.

With the trend of thin keyboard, the height of the keyboard is significantly reduced. The traditional mechanical button structure with a large pressing stroke has been difficult to apply. Therefore, the thin keyboard usually adopts the design of a small stroke button or a touch button. However, it is difficult for the user to feel the pressing feedback regardless of the button of the small stroke or the touch button, which may cause the user to be unable to confirm whether the pressing operation is completed during the actual use, which causes many operational troubles. In addition, there is also a keyboard that generates vibrations by vibrators to provide feedback by the user. However, this design is mostly in addition to the original button structure, plus a vibrator. This design will increase the thickness of the keyboard and thinner the keyboard. The trend runs counter to the trend.

In view of the problems in the prior art, one of the objects of the present invention is to provide a button structure which is integrated with an electric actuator so that the overall thickness of the keyboard using the key structure of the present invention can be maintained at a thin shape and the electric actuator At the same time, it can provide the compression feedback of the vibration, and solve the problem that the press feedback and the thinning of the keyboard are difficult to achieve in the prior art.

In one embodiment, the button structure of the present invention includes a base and a thin plate electrical actuator. The base includes a sensing portion. The thin plate electric actuator is disposed on the base and has an intermediate portion surrounding a surrounding portion of the intermediate portion, the sensing portion is adjacent to the surrounding portion, and a first portion of the surrounding portion is fixed to the base, A second portion of the peripheral portion is simply supported on the base such that the thin plate electrical actuator is resiliently bendable relative to the base. Wherein, when the thin plate electric actuator is deformed by an external force to a deformation amount, the peripheral portion can contact the first sensing portion for triggering the thin plate electric actuator to vibrate.

In another embodiment, the button structure of the present invention comprises a base and a thin plate electrically actuated Device. The thin plate electric actuator has an intermediate portion, an actuator fixed end and an actuator movable end. The thin plate electric actuator circuit has a power supply end point and a grounding end point when a driving signal flows through The power supply terminal and the ground terminal can drive the thin plate electrical actuator to vibrate, the ground terminal extending at least the movable end of the actuator. The susceptor includes a pedestal fixing portion, a first insulating layer and a first sensing portion, the first sensing portion is adjacent to the side of the first insulating layer, and the first sensing portion is lower than the first portion The insulating layer differs by a predetermined height difference, and the fixed end of the actuator is fixed to the base fixing portion. Wherein, when the thin plate electric actuator is not deformed, the movable end of the actuator is simply supported on the first insulating layer, so that the grounding end is away from the first sensing portion; when the thin plate electric actuator is subjected to When an external force acts to deform the movable end of the actuator downward beyond the preset height difference, the ground end contacts the first sensing portion, thereby triggering the driving signal to flow through the power end point and the ground end point And driving the thin plate electric actuator to vibrate; and when the external force continues to act, the intermediate portion continues to vibrate to cause a user to feel that the button structure is vibrating, but the grounding end remains in contact due to an external force The first sensing unit.

Compared with the prior art, the button structure of the present invention integrates the thin plate electric actuator to the support In the support structure, that is, the thin plate electric actuator itself is a part of the support structure, the thin plate electric actuator can directly or indirectly bear the external force applied by the user pressing the button, and the button structure directly utilizes the thin plate The characteristic that the actuator is deformed by an external force triggers the thin plate electric actuator to vibrate to give back to the user's pressing operation. In short, the keyboard with the button structure of the present invention can still maintain a thin shape and at the same time provide press feedback, which solves the problem that the press feedback and the keyboard thinning in the prior art are difficult to achieve.

The advantages and spirit of the present invention can be obtained by the following detailed description of the invention and the accompanying drawings. Go to further understanding.

1‧‧‧Key structure

10‧‧‧ Pedestal

10a‧‧‧Event space

12‧‧‧Sheet electric actuator

14‧‧‧Flexible keycap

16‧‧‧ Controller

100‧‧‧floor

102‧‧‧First board

104‧‧‧Second board

106‧‧‧First board

106a, 106b‧‧‧ insulation

106c‧‧‧ Circuitry

108‧‧‧Second circuit board

108a‧‧‧First insulation

108b‧‧‧Second insulation

108c‧‧‧ Circuitry

110a‧‧‧First Sensing Department

110b‧‧‧Second Sensing Department

110c‧‧‧ Third Sensing Department

120a‧‧‧Intermediate

120b‧‧‧around parts

120c‧‧‧Part 1

120d‧‧‧Part II

120e‧‧‧first electrode

120f‧‧‧Part III

120g‧‧‧Part IV

122‧‧‧Metal substrate

124‧‧‧ Piezoelectric ceramic layer

1002‧‧‧through hole

S1‧‧‧ drive signal

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded view of a button structure in accordance with a preferred embodiment of the present invention.

Fig. 2 is a plan view showing the combination of the key structures in Fig. 1.

Fig. 3 is a schematic view showing a thin plate electric actuator of the key structure in Fig. 1.

Figure 4 is a schematic cross-sectional view of the button structure along line X-X in Figure 2.

Figure 5 is a functional block diagram of the button structure in Figure 1.

Figure 6 is a schematic cross-sectional view of the button structure along line Y-Y in Figure 2.

Figure 7 is a top plan view of a button structure in accordance with another embodiment.

Figure 8 is a top plan view of a button structure in accordance with another embodiment.

Figure 9 is a schematic cross-sectional view showing a key structure according to another embodiment.

Please refer to Figures 1 to 5. 1 is an exploded view of a button structure 1 in accordance with a preferred embodiment of the present invention. 2 is a plan view of the button structure 1, wherein the flexible keycap 14 of the button structure 1 is not shown to clearly show the arrangement relationship of other components. 3 is a schematic view of the thin plate electric actuator 12 of the key structure 1. Fig. 4 is a schematic cross-sectional view of the button structure 1 along line X-X in Fig. 2. Figure 5 is a functional block diagram of the button structure 1. The button structure 1 includes a base 10, a thin plate electric actuator 12, a flexible keycap 14 and a controller 16. The base 10 includes a bottom plate 100, a first plate member 102, a second plate member 104 stacked on the first plate member 102, a first circuit board 106, and a second circuit board 108. The first circuit board 106 is interposed between the first board member 102 and the second board member 104. The first board member 102, the first circuit board 106 and the second board member 104 are stacked on the bottom board 100, and the second circuit board 108 is disposed on the bottom plate 100 with respect to the first circuit board 106. A flexible keycap 14 (e.g., a silicone pad) is placed over the thin plate electrical actuator 12. The controller 16 is electrically connected to the first circuit board 106 and the second circuit board 108. The foregoing diagram is mainly used to display the mechanism actuation part of the button structure 1. In practice, the skilled artisan can easily cooperate with the actual application. In a situation, the structure is moderately changed to accommodate the controller 16. For example, when applied to a keyboard (ie, including a plurality of button structures 1), the controller 16 can be disposed on the frame portion of the keyboard, and at this time, only a single control is required. The device 16 is electrically connected to the plurality of button structures 1, but the invention is not limited thereto.

The thin plate electric actuator 12 has an intermediate portion 120a and a periphery around one of the intermediate portions 120a The portion 120b, the first portion 120c of the peripheral portion 120b serves as an actuator fixed end, sandwiched between the first plate member 102 and the second plate member 104 to be fixed to the base 10. Logically, the portion of the first plate member 102 and the second plate member 104 that sandwiches the fixed end of the actuator may be defined as a base fixing portion, in other words, the fixed end of the actuator is fixed to the base fixing portion. The second portion 120d of one of the peripheral portions 120b serves as an actuator movable end and is simply supported on the base 10. The first plate member 102, the second plate member 104, and the second circuit board 108 are disposed on the bottom plate 100 around the thin plate electric actuator 12. The first plate member 102, the second plate member 104, the second circuit board 108, and The bottom plate 100 forms an active space 10a, and the thin plate electric actuator 12 is disposed on the base 10 corresponding to the movable space 100. Thereby, the thin plate electric actuator 12 can be elastically bent in the movable space 100 with respect to the base 10, for example, the user's finger presses the flexible keycap 14 so that the thin plate electric actuator 12 is bent downward. The first circuit board 106 is electrically connected to the thin plate electric actuator 12 for driving the thin plate electric actuator 12 to vibrate. The pedestal 10 includes a first sensing portion 110a that is integrated into the second circuit board 108. Therefore, the first sensing portion 110a is electrically connected to the controller 16 via the second circuit board 108. The first sensing portion 110a is disposed near the peripheral portion 120b such that when the thin plate electric actuator 12 is deformed by an external force by a deformation amount (as indicated by a broken line in FIG. 4), for example, the user presses the flexible keycap 14 The thin plate electric actuator 12 is bent and deformed, and the peripheral portion 120b can contact the first sensing portion 110a for triggering the vibration of the thin plate electric actuator 12.

In the present embodiment, the thin plate electric actuator 12 is a piezoelectric buzzer, but the present invention does not This is limited. The thin plate electric actuator 12 includes a metal substrate 122 and a piezoelectric ceramic layer 124 formed on the metal substrate 122. The piezoelectric ceramic layer 124 is a non-metal layer, and the metal substrate 122 is disposed under the non-metal layer. One metal layer. The intermediate portion 120a corresponds to the position of the piezoelectric ceramic layer 124, and the peripheral portion 120b, that is, the corresponding metal substrate 122 is a portion covered by the piezoelectric ceramic layer 124. In other words, the metal substrate 122 forms the peripheral portion 120b. The thin plate electric actuator 12 has a first electrode 120e (indicated by a thick line in FIG. 4) and a second electrode, and the first electrode 120e serves as a power supply terminal of the thin plate electric actuator 12 and is disposed on the piezoelectric ceramic. On the layer 124 (ie, the non-metal layer), the second electrode is disposed on the metal substrate 122 (ie, the metal layer) as the grounding end of the thin-plate electrical actuator 12; wherein, in the embodiment, the entire metal substrate 122 Directly as the second electrode, that is, the entire metal substrate 122 is connected At the ground end, the ground terminal (ie, the metal substrate 122) extends at least to the movable end of the actuator (ie, the second portion 120d), in other words, the metal layer extends from the fixed end of the actuator (ie, the first portion 120c) to The actuator is movable (i.e., the second portion 120d) such that the ground terminal can be easily extended to any position below the structure of the thin plate electrical actuator 12. When a driving signal S1 flows through the power supply terminal (ie, the first electrode 120e) and the ground terminal (ie, the metal substrate 122), the thin-plate electric actuator 12 can be driven to vibrate. The first circuit board 106 is sandwiched between the first board member 102 and the second board member 104 together with the first portion 120c. The first circuit board 106 is implemented by two insulating layers 106a, 106b and one of the circuits 106c disposed therein, whereby the circuit 106c can be combined with the first plate member 102, the second plate member 104, and the metal substrate 122 (or A portion 120c, that is, the second electrode, is insulated but electrically connected (eg, soldered) to the circuit 106c and the first electrode 120e to maintain an electrical connection even when the thin-plate electric actuator 12 vibrates, and the second electrode can be (ie, the metal substrate 122) is electrically connected to the second plate member 104. In this embodiment, the first plate member 102 and the second plate member 104 are made of a metal plate member, which can provide good structural strength and the second plate member 104 can be directly grounded, and the controller 16 transmits the first circuit board. The controller is electrically connected to the power supply terminal (ie, the first electrode 120e), and the controller 16 is electrically connected to the ground terminal (ie, the metal substrate 122) through the second board 104, but the invention is not limited thereto. .

The second circuit board 108 includes a first insulating layer 108a and a second insulating layer 108b. a circuit 108c, the circuit 108c is disposed on the second insulating layer 108b, the first insulating layer 108a is stacked on the second insulating layer 108b and covers the circuit 108c. The first sensing portion 110a is a metal pad exposed to be disposed in the second The insulating layer 108b is electrically connected to the circuit 108c. In practice, the first sensing portion 110a can be directly integrated into the circuit structure of the second circuit board 108. The second circuit board 108 is disposed on the bottom plate 100 with the second insulating layer 108b. The second portion 120d is simply supported on the first insulating layer 108a. The first sensing portion 110a is adjacent to the side of the first insulating layer 108a, and the first sensing portion 110a is lower than the first insulating layer 108a by a predetermined height difference. (In the present embodiment, that is, the thickness of the first insulating layer 108a), when the thin-plate electric actuator 12 is not deformed, the movable end of the actuator (i.e., the second portion 120d) is simply supported on the first insulating layer 108a. The grounding end point (ie, the metal substrate 122) is separated from the first sensing portion 110a, that is, insulated from the first sensing portion 110a, and the surrounding portion 120b (or the second portion 120d) is A space is formed between the first sensing portions 110a. When the thin plate electric actuator 12 is subjected to an external force to deform the movable end of the actuator (ie, the second portion 120d) downward beyond the amount of deformation (ie, the preset height difference), the peripheral portion 120b (or the second portion) The portion 120d or the movable end of the actuator contacts the first sensing portion 110a, such that the trigger driving signal S1 flows through the power supply end point (ie, the first electrode 120e) and the ground end point (ie, the metal substrate 122), and The thin plate electric actuator 12 is driven to vibrate. Wherein, when the external force continues to act, the intermediate portion 120a continues to vibrate and a user feels that the button structure 1 is vibrating as a press feedback, but the ground end point (ie, the metal substrate 122) remains in contact due to external force. The first sensing unit 110a. In principle, in order to smoothly support the thin plate electric actuator 12 on the base 10, the overall thickness of the second circuit board 108 is substantially equal to that of the second plate member 104, and the aforementioned deformation amount for triggering can be set by the first The thickness of the insulating layer 108a is controlled. It should be noted that the aforementioned deformation amount refers to the displacement amount when the thin plate electric actuator 12 is deformed corresponding to the first sensing portion 110a, and the displacement amount when the thin plate electric actuator 12 is deformed at the center (ie, the button pressing stroke) There is a certain relationship, which is easily learned by the skilled artisan according to the actual supporting structure, and will not be described again.

In this embodiment, the controller 16 determines whether the first sensing portion 110a is adjacent to the surrounding portion. Whether electrical contact between 120b (or the grounding terminal) can be achieved by detecting a voltage difference. Moreover, the controller 16 can determine whether to output the corresponding character signal according to the foregoing determination. Thus, the button structure 1 does not need to separately set a key switch that triggers output of the corresponding character signal. For example, when there is a voltage difference between the ground terminal (ie, the metal substrate 122) and the first sensing portion 110a, that is, no electrical contact occurs, the controller 16 determines that the button structure 1 is an open circuit, and the controller 16 does not output. The key structure 1 represents one of the word signals and does not output the driving signal S1 to the power supply end point (ie, the first electrode 120e); otherwise, when the ground end point (ie, the metal substrate 122) and the first sensing portion 110a When the voltage difference disappears, that is, electrical contact occurs, the controller 16 determines that the button structure 1 is conductive, and the controller 16 outputs the word signal represented by the button structure 1 and starts outputting the driving signal S1 to the power terminal ( That is, the first electrode 120e) causes the thin-plate electric actuator 12 to vibrate. Wherein, when the thin-plate electric actuator 12 is not deformed, the movable end of the actuator (ie, the second portion 120d) is simply supported on the first insulating layer 108a, and the voltage of the first sensing portion 110a has an original voltage, the original The voltage is different from the voltage at the ground terminal (ie, metal substrate 122); When the thin plate electric actuator 12 is subjected to an external force to deform the movable end of the actuator (ie, the second portion 120d) downward beyond the preset height difference, the ground end point (ie, the metal substrate 122) contacts the first sensing. In the portion 110a, the voltage of the first sensing portion 110a is converted from the original voltage to the same voltage as the ground terminal (ie, the metal substrate 122).

In addition, in the embodiment, the susceptor 10 further includes a second sensing portion 110b and a first The three sensing portions 110c are all integrated into the second circuit board 108, which is the same as the description about the first sensing unit 110a, and will not be further described. The third portion 120f and the fourth portion 120g of the peripheral portion 120b of the thin-plate electric actuator 12 are simply supported by the first sensing portion 110b and the third sensing portion 110c on the first insulating layer of the second circuit board 108. On 108a. Corresponding to each of the portions 120d, 120f, and 120g, the sensing portions 110a, 110b, and 110c are disposed close to each other, and the sensing portions 110a, 110b, and 110c are electrically connected to each other, so that the thin-plate electric actuator 12 is deformed by an external force. At the time of the deformation amount, the surrounding portion 120b can contact at least one of the sensing portions 110a, 110b, 110c, that is, the thin plate electric actuator 12 can be triggered to vibrate. The schematic diagram of the second portion 120d contacting the first sensing portion 110a is as shown in FIG. 4, and the third portion 120f and the fourth portion 120g are in contact with the second sensing portion 110b and the third sensing portion 110c. Shown (this is a schematic cross-sectional view of the button structure 1 along line YY in Fig. 2). In general, if the user substantially presses against the central region of the thin-plate electric actuator 12, the peripheral portion 120b can in principle contact the sensing portions 110a, 110b, 110c at the same time. Thereby, even when the user biases the button structure 1, the button structure 1 can effectively sense the user's pressing operation.

Since the thin plate electric actuator 12 passes through the four portions 120c, 120d, 120f, 120g Supported by the base 10, the four portions 120c, 120d, 120f, 120g are disposed substantially evenly on the peripheral portion 120b, so that the thin plate electric actuator 12 can obtain a smooth supporting effect; in the present embodiment, the four portions 120c 120d, 120f, 120g are arranged at a central angle of 90 degrees. In practice, as shown in FIG. 7 (where the flexible keycap 14 is also not shown in the drawing), if the thin-plate electric actuator 12 is mainly supported by the base 10 through the first portion 120c and the second portion 120d. Then, the first portion 120c and the second portion 120d can be disposed opposite each other to obtain the effect of smooth operation of the thin plate electric actuator 12. Similarly, as shown in Fig. 8 (where the flexible keycap 14 is also not shown in the figure), if the thin plate electric actuator 12 is mainly transparent When the first portion 120c, the second portion 120d, and the third portion 120f are supported by the base 10, the second portion 120d and the third portion 120f may be symmetrically disposed with respect to the first portion 120c to obtain a smooth operation of the thin plate electric actuator 12. Effect.

In addition, in the foregoing embodiments, the thin plate electric actuator 12 is disposed on the bottom plate 100, The bending deformation of the thin plate electric actuator 12 is also related to the pressing stroke that the button structure 1 can provide, in addition to the mechanism for triggering the thin plate electric actuator 12. As shown in FIG. 9, when the button structure 1 is required to provide a larger pressing stroke, a through hole 1002 or a groove may be formed in the bottom plate 100 under the thin plate electric actuator 12 so that when the thin plate electric actuator 12 is deformed At this time, the thin plate electric actuator 12 can partially protrude into the through hole 1002 (shown in broken lines in the drawing). It is to be noted that, in practice, the peripheral portion 120b is not limited to the thin plate electric actuator 12 that protrudes into the through hole 1002 and then contacts the sensing portions 110a, 110b, and 110c.

It is further added that the aforementioned button structure 1 is only a suitable example, and the current button junction is adopted. Commonly used design means, but the invention is not limited thereto. For example, the pedestal can directly form a support structure (such as engineering plastic) and a circuit layout (such as a metal lead frame) in a buried manner, and even integrate the thin-plate electric actuator 12 into the buried incident process. This contributes to the reduction in the number of components and the further thinning of the button structure, and even helps to simplify the process.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10a‧‧‧Event space

12‧‧‧Sheet electric actuator

100‧‧‧floor

102‧‧‧First board

104‧‧‧Second board

106‧‧‧First board

106a, 106b‧‧‧ insulation

106c‧‧‧ Circuitry

108‧‧‧Second circuit board

108a‧‧‧First insulation

108b‧‧‧Second insulation

108c‧‧‧ Circuitry

110a‧‧‧First Sensing Department

120c‧‧‧Part 1

120d‧‧‧Part II

120e‧‧‧first electrode

122‧‧‧Metal substrate

124‧‧‧ Piezoelectric ceramic layer

Claims (18)

A button structure comprising: a base comprising a first sensing portion; and a thin plate electric actuator disposed on the base and having an intermediate portion and a surrounding portion surrounding the intermediate portion, the first a sensing portion is adjacent to the surrounding portion, a first portion of the surrounding portion is fixed to the base, and a second portion of the surrounding portion is simply supported on the base such that the thin plate electric actuator can be opposite to the base Elastic bending; wherein when the thin plate electric actuator is deformed by an external force by a deformation amount, the peripheral portion can contact the first sensing portion for triggering the thin plate electric actuator to vibrate. The button structure of claim 1, wherein the base comprises a first plate member and a second plate member overlapping the first plate member, the first portion being sandwiched between the first plate member and the first plate member Between two boards. The button structure of claim 2, wherein the base comprises a first circuit board electrically connected to the thin plate electrical actuator and sandwiched with the first portion on the first plate and the second plate Between pieces. The button structure of claim 3, wherein the thin plate electrical actuator has a first electrode and a second electrode, the first circuit board being electrically connected to the first electrode and insulated from the second electrode, the first The two plates are electrically and electrically connected to the second electrode. The button structure of claim 4, wherein the thin plate electric actuator is a piezoelectric buzzer, the first electrode is disposed on one of the piezoceramic layers of the piezoelectric buzzer, and the second electrode is One of the piezoelectric buzzer metal substrates. The button structure of claim 5, wherein the first sensing portion is a metal pad, and the metal substrate forms the peripheral portion. The key structure of claim 1, wherein the base comprises a second circuit board, the second circuit board comprises a first insulating layer, a second insulating layer and a circuit, wherein the circuit is disposed on the second insulation a first insulating layer is disposed on the second insulating layer and covers the circuit, the first sensing portion a metal pad is disposed on the second insulating layer and electrically connected to the circuit, the second portion is simply supported on the first insulating layer, the thin plate electric actuator comprises a metal substrate, the metal substrate The peripheral portion is formed. The button structure of claim 7, wherein the base comprises a first plate member, a second plate member and a bottom plate stacked on the first plate member, and the first portion is sandwiched between the first plate member Between the second plate member, the first plate member, the second plate member and the second circuit board are disposed on the bottom plate around the thin plate electric actuator. The key structure of claim 1, wherein the base comprises a bottom plate, and the thin plate electric actuator is disposed on the bottom plate, the bottom plate having a through hole or a groove located under the thin plate electric actuator When the thin plate electric actuator is deformed, the thin plate electric actuator may partially protrude into the through hole or the groove. The button structure as claimed in claim 1, wherein the first portion is disposed opposite to the second portion. The button structure according to claim 1, wherein a third portion of the peripheral portion is simply supported on the base, and the second portion and the third portion are symmetrically disposed with respect to the first portion. The button structure of claim 11, wherein the base comprises a second sensing portion, the first sensing portion is adjacent to the second portion, and the second sensing portion is adjacent to the third portion, when the thin plate is electrically When the actuator is deformed by the external force to the deformation amount, the peripheral portion can contact the second sensing portion for triggering the thin plate electric actuator to vibrate. The button structure as claimed in claim 1, further comprising a flexible key cap placed on the thin plate electric actuator. A button structure comprising: a thin plate electric actuator having an intermediate portion, an actuator fixed end and an actuator movable end, the thin plate electric actuator circuit having a power end a point and a ground terminal, wherein when a driving signal flows through the power terminal and the ground terminal, the thin plate electrical actuator is driven to vibrate, the ground terminal extending at least the movable end of the actuator; The pedestal includes a pedestal fixing portion, a first insulating layer and a first sensing portion, the first sensing portion is adjacent to the side of the first insulating layer, and the first sensing portion is lower than the first portion Insulation And the difference between the preset height difference, the fixed end of the actuator is fixed to the base fixing portion; wherein when the thin plate electric actuator is not deformed, the movable end of the actuator is simply supported on the first insulating layer Keeping the grounding end away from the first sensing portion; wherein the grounding end contact is when the thin plate electric actuator is subjected to an external force to deform the movable end of the actuator downward beyond the preset height difference The first sensing portion triggers the driving signal to flow through the power supply end point and the grounding end point to drive the thin plate electric actuator to vibrate; and when the external force continues to act, the intermediate portion continues to vibrate and allows A user feels that the button structure is vibrating, but the grounding end remains in contact with the first sensing portion due to an external force. The button structure of claim 14, further comprising a controller electrically connected to the ground terminal and the first sensing portion, wherein when there is a voltage difference between the ground terminal and the first sensing portion The controller determines that the button structure is an open circuit, and does not output one of the word signals represented by the button structure; and when the voltage difference between the ground terminal and the first sensing portion disappears, the controller determines that The button structure is turned on, and the character signal represented by the button structure is output. The button structure of claim 14, further comprising a controller electrically connected to the ground terminal and the first sensing portion, wherein when there is a voltage difference between the ground terminal and the first sensing portion The controller determines that the button structure is an open circuit, and does not output the driving signal to the power supply end point; and when the voltage difference between the grounding end point and the first sensing portion disappears, the controller determines the button structure To be turned on, the driving signal is output to the power supply terminal. The button structure of claim 14, wherein when the thin plate electric actuator is not deformed, the movable end of the actuator is simply supported on the first insulating layer, and the first sensing portion voltage has an original voltage. The original voltage is different from the ground terminal voltage; and when the thin plate electric actuator is subjected to an external force to deform the movable end of the actuator downward beyond the preset height difference, the ground end contacts the first a sensing portion, the first sensing portion voltage is converted from the original voltage to be the same as the ground terminal voltage. The button structure of claim 14, wherein the thin plate electric actuator is further provided with a non-metal layer and a metal layer disposed under the non-metal layer, and the power terminal is disposed on the non-metal The grounding end is disposed on the metal layer, the metal layer extending from the fixed end of the actuator to the movable end of the actuator, such that the grounding end can be easily extended to the electrical actuator structure of the thin plate Any of the following locations.