WO2021146920A1

WO2021146920A1 - Multi-button power self-generating switch apparatus

Info

Publication number: WO2021146920A1
Application number: PCT/CN2020/073516
Authority: WO
Inventors: 武文静; 黄驭
Original assignee: 武文静
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2021-07-29
Also published as: CN212625304U

Abstract

A multi-button power self-generating switch apparatus, comprising: a shell (100), a floating plate (200), and a plurality of buttons (300), the floating plates (200) being accommodated in the shell (100), the plurality of buttons (300) being arranged on the same surface of the shell (100), and the floating plate (200) covering the contours of an area surrounded by all of the buttons (300); and a power self-generating module (400), accommodated in the shell (100) and being provided with a plurality of trigger switches (411); when one end of any button (300) is pressed, the button (300) abuts the floating plate (200), such that the floating plate (200) deforms or inclines in the direction of the power self-generating module (400), the floating plate (200) triggering the trigger switch (411) of the corresponding area, and the power self-generating module (400) converting the kinetic energy produced by pressing the button (300) into electrical energy. In the present multi-button power self-generating switch, the plurality of buttons share one power self-generating module, there being few components overall and the structure being compact, enabling products to be made smaller, and also enabling production costs to be reduced.

Description

Multi-button self-generating switch device

Technical field

This application relates to the technical field of self-power generation equipment, in particular to a multi-button self-power generation switch device.

Background technique

The statements here only provide background information related to this application, and do not necessarily constitute prior art.

Switches have been widely used in people's daily life, such as lighting switch, electric curtain control, smart door lock control, doorbell, etc. Some switches are passive switches and have the function of self-generation, that is, a built-in power generation unit, which can convert the kinetic energy generated by key presses into electrical energy. When the switch has multiple keys, most of them are equipped with a drive unit and power generation corresponding to each key. Unit, in this way, the volume of the entire switch becomes larger, it occupies more space, the structure is complicated, and the cost of the product is higher.

technical problem

One of the objectives of the embodiments of the present application is to provide a multi-button self-generating switch device, which aims to solve the problem of large overall volume and high cost of a passive switch with multiple buttons.

Technical solutions

In order to solve the above technical problems, the technical solutions adopted in the embodiments of this application are:

A multi-button self-generating switch device includes:

case;

A floating plate and a plurality of keys, the floating plate is accommodated in the housing, the plurality of keys are arranged on the same surface of the housing, and the floating plate covers all the contours of the area enclosed by the keys;

The self-powered module is housed in the housing and is provided with a plurality of trigger switches;

Wherein, when one end of any one of the buttons is pressed, the button abuts against the floating plate, causing the floating plate to deform or tilt, the floating plate triggers the trigger switch in the corresponding area, and the self-powered module will The kinetic energy generated by pressing the button is converted into electrical energy.

In an embodiment, two ends of the back of the button are respectively provided with top feet, the top feet pass through the housing, and when one end of any one of the buttons is pressed, the top feet corresponding to the buttons are The floating plates are against each other, so that the corresponding side of the floating plates is deformed or inclined.

In one embodiment, the self-generating module includes a circuit board and a piezoelectric sheet, each of the trigger switches is arranged on the edge of the front surface of the circuit board at intervals, and the piezoelectric sheet is arranged on the circuit board and the floating Between the plates, the piezoelectric sheet is electrically connected to the circuit board through conductive wires.

In one embodiment, a plurality of uprights are provided on the back of the floating plate, and each upright is arranged in a one-to-one correspondence with the position of each top foot, and the upright can trigger the corresponding key when the corresponding button is pressed. Trigger switch.

In one embodiment, the housing is provided with a base, the periphery of the piezoelectric sheet is fixed on the base, the base is formed with a notch corresponding to the position of each trigger switch, and the base corresponds to the pressure The position of the electric sheet is recessed to form a receiving groove to accommodate the piezoelectric sheet deformed by force.

In one embodiment, the piezoelectric sheet includes a metal sheet and a piezoelectric material layer adhered to the metal sheet, a cross section of the piezoelectric material layer is circular, and a cross-sectional area of the receiving groove is larger than For the cross-sectional area of the piezoelectric material layer, the peripheral edge of the metal sheet is opposite to the extended edge of the piezoelectric material layer, and the extended edge is abutted and fixed on the base.

In an embodiment, the piezoelectric material layer is a piezoelectric ceramic sheet.

In one embodiment, the metal sheet is a copper sheet, a stainless steel sheet or a tinplate sheet.

In one embodiment, the area on the back of the floating plate corresponding to the piezoelectric sheet is protrudingly formed with a boss with a circular cross section, and the boss is arranged coaxially with the piezoelectric sheet, and the boss The diameter of is smaller than the cross-sectional area of the piezoelectric material layer. When one end of any one of the keys is pressed, the annular boss and the piezoelectric sheet abut.

In one embodiment, the housing includes a bottom shell and a face shell that are connected to each other, the bottom shell and the face shell enclose an accommodating cavity, and the floating plate and the self-powered module are both accommodated in the In the accommodating cavity, each of the keys is installed on the front surface of the face shell, the top surface of the face shell is recessed with a groove, and the keys are at least partially received in the groove.

In one embodiment, the buttons are arranged side by side on the front surface of the face shell.

In one embodiment, the inner bottom wall of the groove is recessed in the width direction to form a receiving groove, and the back of the key is protrudingly formed with a rib adapted to the receiving groove, and A part is accommodated in the accommodating groove, and a screw is used to pass through the face shell to connect with the rib to fix the button to the face shell.

In one embodiment, a connecting post is provided at a middle position of the convex rib, the face shell is provided with an adapted through hole at a position corresponding to the connecting post, and one end of the connecting post extends relative to the convex rib. And extend into the through hole, the connecting column is provided with an internal threaded hole, and the screw is screwed with the internal threaded hole.

In an embodiment, the front surface of the floating plate is recessed to form a plurality of dimples, and the head of each screw is received in the corresponding dimple.

In one embodiment, the inner side wall of the face shell is provided with a plurality of undercuts at intervals, and the inner side wall of the bottom shell is provided with a groove adapted to the undercut at a position corresponding to the undercut, and the face The shell is connected and fixed with the bottom shell through the buckle of the inverted buckle and the card slot.

Beneficial effect

In the multi-button self-powered switch device provided by the embodiment of the present application, a floating plate and a self-powered module are arranged in the housing. When one end of one of the buttons is pressed, the button abuts against the floating plate, so that the corresponding side of the floating plate faces the self-powered module The direction of the self-generation module is deformed or tilted, and the trigger switch at the corresponding position on the self-generation module is triggered, and the corresponding control signal is sent to the controlled device. The self-generation module can also convert the kinetic energy generated by pressing into electrical energy for storage in the process ; Multiple buttons share a self-powered module, with fewer integral parts, compact structure, smaller products, and lower production costs.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the accompanying drawings in the following description are only of the present application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

Figure 1 is a perspective view of a multi-button self-powered switch device provided by an embodiment of the utility model;

2 is a schematic diagram of the front structure of the multi-button self-generating switch device shown in FIG. 1;

Figure 3 is a cross-sectional view taken along line AA in Figure 1;

Figure 4 is an exploded schematic diagram of the multi-button self-powered switch device shown in Figure 1;

Figure 5 is a partial exploded schematic diagram of the multi-button self-powered switch device shown in Figure 1;

Fig. 6 is a perspective view of a floating plate in the multi-button self-generating switch device shown in Fig. 4;

Figure 7 is a perspective view of the floating plate in Figure 5;

FIG. 8 is a perspective view of the buttons in the multi-button self-generating switch device shown in FIG. 4;

Fig. 9 is a perspective view of the base in the multi-button self-powered switch device shown in Fig. 4.

Among them, the reference signs in the figure:

100-housing; 200-floating board; 300-key; 400-self-powered module; 101-accommodating cavity; 110-bottom shell; 120-face shell; 111-card slot; 121-groove; 122-accommodating Slot; 123-inverted buckle; 124-fixed post; 125-through hole; 126-through hole; 210-post; 220-slot body; 221-dimple; 230-curved protrusion; 240-avoidance hole; 250- Boss; 260-annular groove; 310-pin; 320-rab; 330-connecting post; 340-screw; 350-surrounding; 410-circuit board; 411-trigger switch; 420-piezoelectric sheet; 421- Metal sheet; 422—piezoelectric material layer; 423—pad; 430—base; 431—accommodating groove; 432—notch; 433—through hole; 434—positioning protrusion.

Embodiments of the present invention

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are intended to explain the present application, but should not be understood as a limitation to the present application.

In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, not It indicates or implies that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "multiple" means two or more than two, unless otherwise specifically defined.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

In order to illustrate the technical solutions described in this application, detailed descriptions are given below in conjunction with specific drawings and embodiments.

As shown in FIGS. 1 to 3, the multi-button self-powered switch device provided by the embodiment of the present invention includes a housing 100, a floating plate 200, a plurality of buttons 300, and a self-powered module 400. The inside of the housing 100 is hollow, the size and shape of the housing 100 are set according to the number of keys 300, and the corners of the housing 100 can be set as an arc transition. The floating plate 200 is arranged in the housing 100. The floating plate 200 can be an insulating plate. A plurality of buttons 300 are arranged on the same surface of the housing 100. The surface is consistent, and the overall product is more beautiful; as shown in Figure 3 and Figure 4, the floating plate 200 covers the contours of the area enclosed by all the buttons 300, and the cross-sectional contour of the floating plate 200 can be set to the contour of all the buttons 300. Roughly the same. The self-power generation module 400 is disposed in the housing 100, and the self-power generation module 400 is provided with a plurality of trigger switches 411. When one of the buttons 300 is pressed, the button 300 abuts the floating plate 200, so that the corresponding area of the floating plate 200 is deformed or tilted toward the direction of the self-powered module 400, that is, the side of the floating plate 200 is tilted toward the direction of the self-powered module 400 After the floating board 200 is deformed or tilted, it contacts the trigger switch 411 corresponding to the self-generation module 400, and then sends the corresponding control signal to the controlled device in a wireless or wired transmission mode. The monitoring of the button 300 is determined by the principle of keyboard scanning To determine the position of the button 300, determine different code values, and then transmit them from the self-power generation module 400. While the floating plate 200 is deformed or tilted, the self-power generation module 400 can convert the kinetic energy generated by pressing into electrical energy for storage. When multiple buttons 300 are provided, the entire product uses only one self-powered module 400, and multiple buttons 300 share one self-powered module 400, which saves resources, and the overall structure of the product is compact and can be made smaller.

In the multi-button self-powered switch device provided in this embodiment, a floating plate 200 and a self-powered module 400 are arranged in the housing 100. When one end of one of the buttons 300 is pressed, the button 300 and the floating plate 200 abut, making the floating plate 200 correspond to The side of the self-power generation module 400 is deformed or tilted, and triggers the trigger switch 411 at the corresponding position on the self-power generation module 400 to send the corresponding control signal to the controlled device. The self-power generation module 400 is also in the process The kinetic energy generated by pressing can be converted into electric energy for storage; multiple keys 300 share a self-powered module 400, with fewer integral parts, compact structure, smaller products, and lower production costs.

In one embodiment, as shown in FIGS. 3 and 4, the housing 100 includes a bottom shell 110 and a face shell 120 that are connected to each other. The bottom shell 110 and the face shell 120 enclose a accommodating cavity 101, a floating plate 200 and a self-powered The modules 400 are all accommodated in the accommodating cavity 101. The front surface of the cover 120 is recessed with a groove 121, the button 300 is connected and fixed with the cover 120 by a screw 340, and the button 300 is at least partially accommodated in the groove 121. The cross section of the groove 121 is substantially rectangular, a plurality of buttons 300 are arranged side by side in the groove 121, and there is a gap between the button 300 and the side wall of the groove 121.

As shown in FIGS. 3 to 5, the face shell 120 can be detachably installed on the bottom shell 110. Specifically, the face shell 120 can be assembled and fixed with the bottom shell 110 through a snap or snap structure. In one embodiment, the inner side wall of the face shell 120 is provided with a plurality of undercuts 123 at intervals, and the inner side wall of the bottom shell 110 is recessed to form a groove 111 corresponding to the position of each undercut 123, and the undercut 123 is matched with the groove 111 , The bottom shell 110 and the surface shell 120 are assembled and fixed by the buckle between the undercut 123 and the slot 111.

In an embodiment, the buttons 300 are arranged side by side on the front of the shell 120, and the middle of the buttons 300 is connected to the housing 100. The number of buttons 300 can be 2, 3, 4 or more, which can be specific according to actual conditions. Need to be set. A trigger switch 411 is provided on the circuit board 410 corresponding to both ends of each button 300. When either end of the button 300 is pressed, the corresponding trigger switch 411 is triggered, and the circuit board 410 works under the trigger of different trigger signals. As shown in Figures 2 to 4, in one embodiment, two buttons 300 are arranged side by side, and the two buttons 300 have the same size and shape, so that the front of the entire device has four pressing parts arranged in a matrix array, and any one of them is pressed. The pressing part can achieve the purpose of kinetic energy conversion of electric energy; the middle part of the button 300 can be connected and fixed with the housing 100 by a screw 340, and there is a gap between the two ends of the button 300 in the length direction and the housing 100.

In one embodiment, as shown in FIGS. 3, 4, and 8, the inner bottom wall of the groove 121 is recessed in the width direction to form a receiving groove 122, and the back of the key 300 is protrudingly formed to fit the receiving groove For the ribs 320 of 122, the cross section of the ribs 320 perpendicular to the length direction of the ribs may be arc-shaped or other shapes, and a part of the ribs 320 is received in the accommodating groove 122. The button 300 is connected to the face shell 120 by a screw 340, and the screw 340 passes through the face shell 120 and is threadedly connected to the rib 320. The screw 340 can be connected to the middle position of the rib 320, and the head of the screw 340 is pressed against the back of the face shell 120.

As shown in Figures 4 and 8, the periphery of the back of the button 300 is provided with a surrounding edge 350, and the middle position of the back of the button 300 is protrudingly formed with a convex rib 320. The two ends of the convex rib 320 are joined with the surrounding edge 350. An accommodating groove 122 is recessed in the middle of the inner bottom wall along the width direction, so that there is a gap between the button 300 and the inner bottom wall of the groove 121 to provide an accommodating space for the button 300 to press.

In one embodiment, as shown in FIGS. 4 and 8, a connecting post 330 is provided at the middle position of the rib 320, and a matching through hole 125 is opened at the position of the face shell 120 corresponding to the connecting post 330, and one end of the connecting post 330 Relative to the protruding rib 320 and extending into the through hole 125, the connecting post 330 is provided with an internal threaded hole, and the screw 340 is screwed with the internal threaded hole.

That is to say, the connecting column 330 is perpendicular to the surface shell 120, the length of the connecting column 330 is greater than the thickness of the rib 320, and the outer diameter of the connecting column 330 can be set to be greater than the width of the rib 320. The connecting post 330 is aligned with the through hole 125 of the face shell 120, so that a part of the connecting post 330 extends into the through hole 125 of the face shell 120, and then the connecting post 330 is connected with the screw 340, and the screw 340 is tightened to connect the button 300 to the face The shell 120 is assembled and fixed together, and after other components are assembled, the face shell 120 is clamped to the bottom shell 110 to complete the assembly of the product, and the assembly operation is simple and convenient.

In one embodiment, as shown in FIGS. 4 and 7, the front surface of the floating plate 200 is recessed and formed with a plurality of recesses 221, and the head of each screw 340 is received in the corresponding recess 221, and the provided recess 221 can be A space is provided for the head of the screw 340, so that after the button 300 is assembled on the cover 120, the entire thickness of the button 300, the cover 120, and the floating plate 200 is small, and the overall product can be made thinner and the structure is more compact.

In an embodiment, the two ends of the back of each button 300 are respectively provided with top feet 310, and the housing 100 is provided with through holes 126 corresponding to the positions of the top feet 310. The top feet 310 pass through the through holes 126, and the top feet 310 can It is set at the corresponding position facing the front edge of the floating plate 200. When one end of any button 300 is pressed, the top foot 310 corresponding to the button 300 abuts against the floating plate 200, causing the corresponding side of the floating plate 200 to deform or tilt, so that the floating plate 200 can trigger the trigger switch 411 at the corresponding position to deform or While tilting, the kinetic energy is converted into electric energy and stored in the self-generation module 400 to supply power to the trigger switch 411.

As shown in FIG. 4 and FIG. 8, two buttons 300 are arranged side by side, top feet 310 are respectively provided at the opposite corners of the backs of the two buttons 300, and arc transitions are arranged at the opposite corners of the two buttons 300.

In one embodiment, as shown in FIGS. 3 to 5, the self-powered module 400 includes a circuit board 410 and a piezoelectric sheet 420. A plurality of trigger switches 411 are arranged at intervals on the edge of the front of the circuit board 410, and the piezoelectric sheet 420 is arranged on Between the circuit board 410 and the floating board 200, the piezoelectric sheet 420 may be electrically connected to the circuit board 410 through conductive wires.

The back of the shell 120 can be provided with a plurality of fixing posts 124, and the circuit board 410 can be provided with via holes corresponding to the positions of the fixing posts 124, and screws are used to pass through the via holes to connect with the fixing posts 124, so that the circuit board 410 is connected to the fixing posts 124. The assembly between the face shells 120 is fixed. It is understandable that the circuit board 410 may not be assembled and fixed with the front case 120, and the circuit board 410 may also be installed and fixed in the bottom case 110.

In one embodiment, as shown in FIGS. 3, 4, and 8, a plurality of uprights 210 are provided on the back of the floating plate 200, and the uprights 210 are arranged in a one-to-one correspondence with the positions of the top feet 310. When the button 300 is not pressed , There is a gap between the column 210 and the corresponding trigger switch 411; when one of the buttons 300 is pressed, the top foot 310 abuts against the edge of the front of the floating plate 200, so that a column 210 in the corresponding area of the floating plate 200 corresponds to the self-generating module 400 When the trigger switch 411 is triggered by the column 210, the trigger switch 411 sends the corresponding control signal to the controlled device.

As shown in FIG. 3 and FIG. 8, the cross section of the top leg 310 is a cross-shaped structure, and the housing 100 has a through hole 126 slightly larger than the top leg 310 at a position corresponding to the top leg 310. As shown in FIG. 3 and FIG. 7, the pillar 210 on the back of the floating plate 200 has a cylindrical shape as a whole, and the end away from the floating plate 200 is provided with a round head to avoid scratching the trigger switch 411 on the self-power module 400.

As shown in Figure 3, Figure 6 and Figure 7, each corner of the floating plate 200 can be set with a chamfer, specifically a 45-degree chamfer can be set; the position of the front of the floating plate 200 near each corner can be respectively set with an arc Protrusions 230, the positions on the back of the face shell 120 corresponding to the arc-shaped protrusions 230 can be recessed to form adapted arc-shaped grooves, at least a part of the arc-shaped protrusions 230 are received in the corresponding arc-shaped grooves, and the button 300 is not pressed. When pressing the button 300, the top foot 310 on the back of the button 300 is in contact with the arc-shaped protrusion 230. When one end of the button 300 is pressed, the top foot 310 and the arc-shaped protrusion 230 abut against each other, so that the corresponding side of the floating plate 200 faces the self-generating module 400. Distortion occurs in the direction.

In an embodiment, as shown in FIGS. 3, 4, and 8, the self-powered module 400 further includes a base 430, the periphery of the piezoelectric sheet 420 is fixed on the base 430, and the position of the base 430 corresponding to the piezoelectric sheet 420 is recessed A receiving groove 431 is formed to accommodate the piezoelectric sheet 420 deformed by force. A notch 432 is formed at the position of the base 430 corresponding to each trigger switch 411, and the post 210 passes through the notch 432 and faces the trigger switch 411 at the corresponding position. In other words, each trigger switch 411 is exposed relative to the base 430, and each trigger switch 411 is not covered by the base 430 and the piezoelectric sheet 420, which reduces the shielding effect of the metal sheet 421 in the piezoelectric sheet 420 and reduces radio frequency signals. The attenuation.

The circuit board 410 is equipped with a chip, a transmitting module and an energy storage module. The kinetic energy generated by pressing the button 300 is converted into electric energy and stored in the energy storage module. The monitoring of the button 300 is based on the keyboard scanning principle. The chip determines the keyboard and then determines the button. The position of 300 is determined by different code values, and then transmitted by the transmitter module.

As shown in FIGS. 4 and 9, the front surface of the base 430 may be provided with a plurality of positioning protrusions 434, and the metal sheet 421 is provided with positioning holes at corresponding positions, which facilitates the rapid assembly of the piezoelectric sheet 420.

It is understandable that the self-power generation module 400 is not limited to adopting the aforementioned piezoelectric power generation structure, and other structures that can convert kinetic energy into electrical energy can also be used.

In one embodiment, as shown in FIGS. 3 to 5, the piezoelectric sheet 420 includes a metal sheet 421 and a piezoelectric material layer 422 attached to the metal sheet 421. The cross section of the piezoelectric material layer 422 is circular, and the base The cross-sectional area of the receiving groove 431 on the front of the 430 is larger than the cross-sectional area of the piezoelectric material layer 422.

In an embodiment, the piezoelectric material layer 422 may be a piezoelectric ceramic sheet, or other materials that can form electrical energy after being deformed under pressure.

In an embodiment, the metal sheet 421 may be, but not limited to, a copper sheet, or a tinplate sheet or a stainless steel sheet; the metal sheet 421 is electrically connected to the circuit board 410 through conductive wires. As shown in Figures 4 and 5, the metal sheet 421 may be provided with a pad 423 near the edge, and the conductive wire can be welded through the pad 423. The floating plate 200 is provided with a relief hole 240 at the position corresponding to the pad 423 to avoid welding. Disk 423. The metal sheet 421 and the piezoelectric ceramic sheet are both circular, and they are arranged coaxially. The metal sheet 421 can be bonded and fixed on the back of the piezoelectric ceramic sheet, and the diameter of the metal sheet 421 is set to be larger than the diameter of the piezoelectric ceramic sheet.

As shown in Figures 4, 5 and 9, the peripheral edge of the metal sheet 421 is opposite to the extended edge of the piezoelectric material layer 422, and the extended edge is fixed to the base 430 by abutting, and the extended edge can be fixed to the base 430 by bonding. On the base 430. The edge of the metal sheet 421 is relative to the protruding portion of the piezoelectric sheet 420, and the protruding portion of the metal sheet 421 is connected and fixed to the base 430, specifically, it can be bonded and fixed by industrial glue. An end of the base 430 close to the pad 423 is provided with a through hole 433 for the conductive wire to pass through.

In one embodiment, as shown in FIG. 4, FIG. 5 and FIG. 7, the area of the bottom surface of the floating plate 200 corresponding to the piezoelectric sheet 420 is protrudingly formed with a boss 250, the cross section of the boss 250 is circular, and the boss 250 The bottom surface of the floating plate 200 protrudes relative to the bottom surface of the floating plate 200, the boss 250 is arranged coaxially with the piezoelectric sheet 420, and the diameter of the boss 250 is set to be smaller than the cross-sectional area of the piezoelectric material layer 420; press any one end of the button 300 At this time, the boss 250 and the piezoelectric sheet 420 abut against each other. When the button 300 is not pressed, there is a gap between the boss 250 and the piezoelectric sheet 420, or it is in contact with the piezoelectric sheet 420 but the piezoelectric sheet 420 is not deformed; when one end of the button 300 is pressed, the boss 250 and the piezoelectric sheet 420 The piezoelectric sheet 420 cancels out. The opposite surface of the boss 250 and the piezoelectric sheet 420 may be a curved surface, specifically a spherical surface, which is beneficial to control the amount of deformation of the piezoelectric sheet 420 when the piezoelectric sheet 420 is deformed under a force.

The front surface of the floating plate 200 is recessed with a trough 220 with a circular cross-section. Two dimples 221 are formed on the bottom wall of the trough 220. This can further reduce the total thickness of the components after assembly, so that the product can be made. Thinner. The back of the floating plate 200 is recessed on the circumferential side of the boss 250 to form an annular groove 260, so that the thickness of the floating plate 200 close to the circumferential side of the boss 250 is thinner, which can improve the elasticity of the boss 250, and is beneficial to the boss 250 and the pressure. When the electric strips 420 collide, a state of elastic contact is formed.

The above are only optional embodiments of the present application, and are not used to limit the present application. For those skilled in the art, this application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the scope of the claims of this application.

Claims

A multi-button self-generating switch device includes:

case;

A floating plate and a plurality of keys, the floating plate is accommodated in the housing, the plurality of keys are arranged on the same surface of the housing, and the floating plate covers all the contours of the area enclosed by the keys;

The self-powered module is housed in the housing and is provided with a plurality of trigger switches;

Wherein, when one end of any one of the buttons is pressed, the button abuts against the floating plate, causing the floating plate to deform or tilt, the floating plate triggers the trigger switch in the corresponding area, and the self-powered module will The kinetic energy generated by pressing the button is converted into electrical energy.
The multi-button self-powered switch device according to claim 1, wherein the two ends of the back of the button are respectively provided with top feet, and the top feet pass through the housing, and when one end of any one of the buttons is pressed , The top foot corresponding to the button abuts against the floating plate, so that the corresponding side of the floating plate is deformed or tilted.
The multi-button self-powered switch device according to claim 2, wherein the self-powered module includes a circuit board and a piezoelectric sheet, each of the trigger switches is arranged at an interval on the edge of the front surface of the circuit board, and the press The electric sheet is arranged between the circuit board and the floating plate, and the piezoelectric sheet is electrically connected to the circuit board through conductive wires.
The multi-button self-powered switch device according to claim 3, wherein a plurality of uprights are provided on the back of the floating plate, and each of the uprights is arranged in a one-to-one correspondence with the positions of the top feet, and the uprights When the corresponding key is pressed, the corresponding trigger switch can be triggered.
The multi-button self-powered switch device according to claim 4, wherein a base is provided in the housing, the periphery of the piezoelectric sheet is fixed on the base, and the base corresponds to the trigger switch A gap is formed in the position, and the base is recessed with a receiving groove corresponding to the position of the piezoelectric sheet to accommodate the piezoelectric sheet deformed by force.
The multi-button self-powered switch device according to claim 5, wherein the piezoelectric sheet comprises a metal sheet and a piezoelectric material layer adhered to the metal sheet, and a cross section of the piezoelectric material layer is A circular shape, the cross-sectional area of the receiving groove is larger than the cross-sectional area of the piezoelectric material layer, the peripheral edge of the metal sheet is opposite to the extended edge of the piezoelectric material layer, and the extended edge is fixed against On the base.
7. The multi-button self-powered switch device according to claim 6, wherein the piezoelectric material layer is a piezoelectric ceramic sheet.
The multi-button self-powered switch device according to claim 6, wherein the metal sheet is a copper sheet, a stainless steel sheet or a tinplate sheet.
The multi-button self-powered switch device according to claim 6, wherein the area on the back of the floating plate corresponding to the piezoelectric sheet is protrudingly formed with a boss with a circular cross section, and the boss is in contact with the The piezoelectric sheet is arranged coaxially, the diameter of the boss is smaller than the cross-sectional area of the piezoelectric material layer, and when one end of any one of the keys is pressed, the annular boss abuts against the piezoelectric sheet.
The multi-button self-powered switch device according to claim 1, wherein the housing includes a bottom shell and a face shell that are connected to each other, the bottom shell and the face shell enclose an accommodating cavity, and the floating The board and the self-powered module are both accommodated in the accommodating cavity, each of the keys is installed on the front of the face case, the top surface of the face case is recessed and formed with a groove, and the keys are at least partially accommodated In the groove.
The multi-button self-powered switch device according to claim 10, wherein the buttons are arranged side by side on the front surface of the face shell.
The multi-button self-powered switch device according to claim 10, wherein the inner bottom wall of the groove is recessed in the width direction to form a receiving groove, and the back of the button is protruding and formed to fit the The convex rib of the accommodating groove, a part of the convex rib is accommodated in the accommodating groove, and a screw is used to pass through the face shell to connect with the convex rib to fix the button to the face shell.
The multi-button self-powered switch device according to claim 12, wherein the middle position of the rib is provided with a connecting post, and the face shell is provided with an adapted through hole at a position corresponding to the connecting post, so One end of the connecting column protrudes relative to the convex rib and extends into the through hole, the connecting column is provided with an internal threaded hole, and the screw is screwed with the internal threaded hole.
The multi-button self-powered switch device according to claim 12, wherein a plurality of dimples are formed on the front of the floating plate, and the head of each screw is received in the corresponding dimple.
The multi-button self-powered switch device according to claim 10, characterized in that: the inner side wall of the face shell is provided with a plurality of inverted buckles at intervals, and the inner side wall of the bottom shell is provided with a suitable position corresponding to the position of the inverted buckle. Equipped with the inverted buckle groove, the surface shell is connected and fixed with the bottom case through the buckle of the inverted buckle and the groove.