CN212625304U

CN212625304U - Multi-key self-power-generation switch device

Info

Publication number: CN212625304U
Application number: CN202090000006.8U
Authority: CN
Inventors: 武文静; 黄驭
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2021-02-26
Anticipated expiration: 2030-01-21
Also published as: WO2021146920A1

Abstract

The application discloses many buttons are from generating switching device includes: a housing; the floating plate is accommodated in the shell, the keys are arranged on the same surface of the shell, and the floating plate covers the area outline surrounded by all the keys; the self-generating module is accommodated in the shell and is provided with a plurality of trigger switches; when one end of any key is pressed, the key abuts against the floating plate, so that the floating plate deforms or inclines towards the direction of the self-generating module, the floating plate triggers the trigger switch in the corresponding area, and the self-generating module converts kinetic energy generated by pressing the key into electric energy. The utility model provides a many buttons are from generating switch, a plurality of buttons share from generating module, and whole part is few, compact structure, and the product can be done littleer, and the cost of manufacture also can reduce.

Description

Multi-key self-power-generation switch device

Technical Field

The application relates to the technical field of self-generating equipment, in particular to a multi-key self-generating switch device.

Background

The statements herein merely provide background information related to the present application and may not necessarily constitute prior art.

Switches have been widely used in people's daily life, such as switches for lighting lamps, electric curtain control, intelligent door lock control, doorbells, and the like. Some switches are passive switches, have the function from electricity generation, built-in electricity generation unit promptly, and it can be with the kinetic energy conversion that the button pressed the production for the electric energy, when the switch has a plurality of buttons, mostly every button corresponds and sets up a drive unit and electricity generation unit, and like this, the volume of whole switch becomes great, and the space that occupies is more, and the structure is complicated, and the cost of product is higher.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a many buttons are from generating switch device, aim at solving the technical problem that the whole volume of passive switch that has a plurality of buttons is great among the prior art, the cost is higher.

In order to solve the technical problem, the embodiment of the application adopts the following technical scheme:

a multi-button self-generating switching device comprising:

a housing;

the floating plate is accommodated in the shell, the keys are arranged on the same surface of the shell, and the floating plate covers the area outline surrounded by all the keys;

the self-generating module is accommodated in the shell and is provided with a plurality of trigger switches;

when one end of any one key is pressed, the key abuts against the floating plate to enable the floating plate to deform or incline, the floating plate triggers the trigger switch in the corresponding area, and the self-generating module converts kinetic energy generated by pressing the key into electric energy.

In one embodiment, two ends of the back surface of each key are respectively provided with a top leg, the top legs penetrate through the shell, when one end of any one key is pressed, the top leg corresponding to the key abuts against the floating plate, and one corresponding side of the floating plate is deformed or inclined.

In one embodiment, the self-generating module includes a circuit board and piezoelectric sheets, each trigger switch is arranged at an edge of the front surface of the circuit board at intervals, the piezoelectric sheets are arranged between the circuit board and the floating plate, and the piezoelectric sheets are electrically connected with the circuit board through conductive wires.

In one embodiment, a plurality of columns are arranged on the back surface of the floating plate, each column is arranged in one-to-one correspondence to the position of each supporting foot, and each column can trigger a corresponding trigger switch when a corresponding key is pressed.

In one embodiment, a base is arranged in the housing, the periphery of the piezoelectric sheet is fixed on the base, a notch is formed on the base corresponding to the position of each trigger switch, and a containing groove is formed on the base corresponding to the position of the piezoelectric sheet in a concave manner so as to contain the piezoelectric sheet deformed by force.

In one embodiment, the piezoelectric sheet comprises a metal sheet and a piezoelectric material layer adhered to the metal sheet, the piezoelectric material layer is circular in cross section, the cross section area of the accommodating groove is larger than that of the piezoelectric material layer, the periphery of the metal sheet is provided with an extending edge protruding relative to the piezoelectric material layer, and the extending edge is abutted and fixed on the base.

In one embodiment, the piezoelectric material layer is a piezoceramic sheet.

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

In one embodiment, a boss with a circular cross section is formed in a protruding mode in the area, corresponding to the piezoelectric sheet, of the back face of the floating plate, the boss and the piezoelectric sheet are arranged coaxially, the diameter of the boss is smaller than the cross section area of the piezoelectric material layer, and when one end of any one key is pressed, the boss abuts against the piezoelectric sheet.

In one embodiment, the housing includes a bottom shell and a front shell connected to each other, the bottom shell and the front shell define a receiving cavity, the floating plate and the self-generating module are received in the receiving cavity, each of the keys is mounted on a front surface of the front shell, a recess is formed in a top surface of the front shell, and at least a portion of the key is received in the recess.

In one embodiment, the keys 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 an accommodating groove, the back surface of the key is protruded to form a protruding rib adapted to the accommodating groove, a part of the protruding rib is accommodated in the accommodating groove, and a screw is used to penetrate through the face shell and be connected with the protruding rib, so as to fix the key on the face shell.

In one embodiment, a connecting column is arranged in the middle of the convex rib, a through hole matched with the surface shell is formed in the position, corresponding to the connecting column, of the surface shell, one end of the connecting column extends out of the convex rib and extends into the through hole, an internal threaded hole is formed in the connecting column, and the screw is in threaded connection with the internal threaded hole.

In one embodiment, the front surface of the floating plate is recessed to form a plurality of recesses, and the head of each screw is received in the corresponding recess.

In one embodiment, a plurality of reverse buckles are arranged on the inner side wall of the face shell at intervals, clamping grooves matched with the reverse buckles are formed in the positions, corresponding to the reverse buckles, of the inner side wall of the bottom shell, and the face shell is fixedly connected with the bottom shell through the buckling of the reverse buckles and the clamping grooves.

The beneficial effect of this application: according to the multi-key self-generating switch device provided by the embodiment of the application, the floating plate and the self-generating module are arranged in the shell, when one end of one key is pressed, the key abuts against the floating plate, one side corresponding to the floating plate is deformed or inclined towards the direction of the self-generating module, the trigger switch at the corresponding position on the self-generating module is triggered, a corresponding control signal is sent to controlled equipment, and the self-generating module can convert kinetic energy generated by pressing into electric energy to be stored in the process; a plurality of keys share one self-generating module, so that the whole components are few, the structure is compact, the product can be made smaller, and the manufacturing cost can be reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a perspective view of a multi-button self-generating switch device according to an embodiment of the present invention;

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

FIG. 3 is a cross-sectional view taken along line AA in FIG. 2;

FIG. 4 is an exploded view of the multi-button self-generating electrical switching apparatus of FIG. 1;

FIG. 5 is a schematic diagram of a partial explosion of the multi-button self-generating electrical switching apparatus of FIG. 1;

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

FIG. 7 is a perspective view of the floating plate of FIG. 5;

fig. 8 is a perspective view of a key in the multi-key self-generating switch device shown in fig. 4;

fig. 9 is a perspective view of a base in the multi-key self-generating switch device shown in fig. 4.

Wherein, in the figures, the respective reference numerals:

100-a housing; 200-a floating plate; 300-push button; 400-from the power generation module; 101-a containing cavity; 110-a bottom shell; 120-a face shell; 111-card slot; 121-grooves; 122-a receiving groove; 123-back-off; 124-fixed column; 125-through holes; 126-a through-hole; 210-a column; 220-a trough body; 221-dimples; 230-arc-shaped protrusion; 240-avoidance holes; 250-a boss; 260-an annular groove; 310-top leg; 320-convex ribs; 330-connecting column; 340-screws; 350-surrounding edge; 410-a circuit board; 411-trigger switch; 420-piezoelectric patches; 421-a metal sheet; 422-a layer of piezoelectric material; 423-bonding pad; 430-a base; 431-a storage tank; 432-notch; 433-pass through hole; 434-positioning protrusions.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, is not to be considered as limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In order to explain the technical solutions of the present application, the following detailed descriptions are made with reference to specific drawings and examples.

As shown in fig. 1-3, the embodiment of the utility model provides a many buttons are from generating electricity switching device, including casing 100, floating plate 200, a plurality of buttons 300 and from generating electricity module 400. The interior of the casing 100 is hollow, the size and shape of the casing 100 are set according to the number of the keys 300, and the corners of the casing 100 can be set to be arc-shaped transitions. The floating plate 200 is arranged in the shell 100, the floating plate 200 can adopt an insulating plate, the plurality of keys 300 are arranged on the same surface of the shell 100, and the front surfaces of the keys 300 can be arc-shaped surfaces so as to be matched with the outer surface of the shell 100, so that the whole product is more attractive; as shown in fig. 3 and 4, the floating plate 200 covers the outline of the area surrounded by all the keys 300, and the cross-sectional outline of the floating plate 200 may be set to be substantially the same as the outline surrounded by all the keys 300. The self-generating module 400 is disposed in the case 100, and the self-generating module 400 is provided with a plurality of trigger switches 411. When one of the keys 300 is pressed, the key 300 abuts against the floating plate 200, so that the corresponding area of the floating plate 200 deforms or inclines towards the direction from the power generation module 400, namely the side of the floating plate 200 inclines towards the direction from the power generation module 400, the floating plate 200 contacts with the trigger switch 411 corresponding to the power generation module 400 after being deformed or inclined, and then sends a corresponding control signal to the controlled equipment in a wireless or wired transmission mode, the monitoring of the key 300 judges the position of the key 300 through the keyboard scanning principle, determines different code values, and then the different code values are emitted from the power generation module 400. When the floating plate 200 is deformed or inclined, the self-generating module 400 can convert kinetic energy generated by pressing into electric energy to be stored. Under the condition that a plurality of keys 300 are arranged, the whole product only uses one self-generating module 400, the plurality of keys 300 share one self-generating module 400, resources are saved, the whole structure of the product is compact, and the product can be made smaller.

In the multi-key self-generating switch device provided by the embodiment, the floating plate 200 and the self-generating module 400 are arranged in the shell 100, when one end of one key 300 is pressed, the key 300 abuts against the floating plate 200, so that one side corresponding to the floating plate 200 is deformed or inclined towards the direction of the self-generating module 400, the trigger switch 411 at the corresponding position on the self-generating module 400 is triggered, a corresponding control signal is sent to controlled equipment, and the self-generating module 400 can also convert kinetic energy generated by pressing into electric energy for storage; the plurality of keys 300 share one self-generating module 400, so that the whole components are few, the structure is compact, the product can be made smaller, and the manufacturing cost can be reduced.

In one embodiment, as shown in fig. 3 and 4, the housing 100 includes a bottom shell 110 and a top shell 120 connected to each other, the bottom shell 110 and the top shell 120 enclose a receiving cavity 101, the floating plate 200 and the self-generating module 400 are received in the receiving cavity 101, a recess 121 is formed in a front surface of the top shell 120, the key 300 is connected and fixed to the top shell 120 by a screw 340, and at least a portion of the key 300 is received in the recess 121. The cross section of the groove 121 is substantially rectangular, a plurality of keys 300 are arranged in the groove 121 side by side, and a gap is formed between each key 300 and the side wall of the groove 121.

As shown in fig. 3 to 5, the face shell 120 is detachably mounted on the bottom shell 110, and specifically, the face shell 120 can be assembled and fixed with the bottom shell 110 through a snap-fit or buckling structure. In an embodiment, a plurality of reverse buckles 123 are arranged on the inner side wall of the face shell 120 at intervals, a slot 111 is formed in the inner side wall of the bottom shell 110 at a position corresponding to each reverse buckle 123, the reverse buckles 123 are matched with the slot 111, and the bottom shell 110 and the face shell 120 are assembled and fixed through the buckling between the reverse buckles 123 and the slot 111.

In an embodiment, the keys 300 are arranged side by side on the front surface of the front shell 120, the middle parts of the keys 300 are connected with the casing 100, the number of the keys 300 may be 2, 3, 4 or more, and the keys 300 may be specifically set according to actual needs. The circuit board 410 is provided with a trigger switch 411 corresponding to each end of the key 300, when any end of the key 300 is pressed, the corresponding trigger switch 411 is triggered, and the circuit board 410 works under the triggering of different trigger signals. As shown in fig. 2 to 4, in an 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 whole device has four pressing parts arranged in a matrix array, and the purpose of converting kinetic energy into electric energy can be achieved by pressing any one of the pressing parts; the middle of the key 300 may be fixed to the housing 100 by screws 340, and gaps are formed between both ends of the key 300 in the length direction and the housing 100.

In an embodiment, as shown in fig. 3, 4 and 8, the inner bottom wall of the groove 121 is recessed along the width direction to form an accommodating groove 122, the back surface of the key 300 is protruded to form a protruding rib 320 adapted to the accommodating groove 122, a cross section of the protruding rib 320 perpendicular to the length direction of the protruding rib may be arc-shaped or other shapes, and a portion of the protruding rib 320 is accommodated in the accommodating groove 122. The button 300 is connected to the face case 120 by a screw 340, and the screw 340 is threaded to the rib 320 through the face case 120. The screw 340 can be connected to the middle of the rib 320, and the head of the screw 340 is tightly against the back of the face shell 120.

As shown in fig. 4 and 8, the periphery of the back of the key 300 is provided with a surrounding edge 350, a protruding rib 320 is convexly formed at the middle position of the back of the key 300, two ends of the protruding rib 320 are engaged with the surrounding edge 350, and a receiving groove 122 is concavely formed at the middle position of the inner bottom wall of the groove 121 along the width direction, so that a gap is formed between the key 300 and the inner bottom wall of the groove 121 to provide a receiving space for pressing the key 300.

In an embodiment, as shown in fig. 4 and 8, a connection column 330 is disposed at the middle position of the rib 320, a through hole 125 is disposed at the position of the face shell 120 corresponding to the connection column 330, one end of the connection column 330 extends out of the rib 320 and into the through hole 125, the connection column 330 has an internal threaded hole, and a screw 340 is screwed with the internal threaded hole.

That is to say, the connecting column 330 is perpendicular to the face shell 120, the length of the connecting column 330 is greater than the thickness of the convex rib 320, the outer diameter of the connecting column 330 can be set to be greater than the width of the convex rib 320, during assembly, the connecting column 330 of the key 300 is aligned to the through hole 125 of the face shell 120, so that a part of the connecting column 330 extends into the through hole 125 of the face shell 120, then the connecting column 330 is connected by the screw 340, the screw 340 is screwed, thus the key 300 and the face shell 120 are assembled and fixed together, after other components are assembled, the face shell 120 is clamped on the bottom shell 110, the assembly of the product is completed, and the assembly operation is simple and convenient.

In an embodiment, as shown in fig. 4 and 7, a plurality of recesses 221 are concavely formed on the front surface of the floating plate 200, the head of each screw 340 is accommodated in the corresponding recess 221, and the provided recess 221 can provide an escape space for the head of the screw 340, so that after the key 300 is assembled on the face shell 120, the thickness of the key 300, the face shell 120 and the floating plate 200 is small, the whole product can be made thinner, and the structure is more compact.

In an embodiment, two ends of the back surface of each key 300 are respectively provided with a top leg 310, a through hole 126 is formed at a position of the housing 100 corresponding to each top leg 310, the top leg 310 passes through the through hole 126, and the top leg 310 may be disposed opposite to a corresponding position of the front edge of the floating plate 200. When one end of any key 300 is pressed, the top leg 310 corresponding to the key 300 abuts against the floating plate 200, so that the corresponding side of the floating plate 200 is deformed or inclined, the floating plate 200 can trigger the trigger switch 411 at the corresponding position, and kinetic energy is converted into electric energy and stored in the self-generating module 400 while the deformation or the inclination occurs, so as to supply power for the trigger switch 411.

As shown in fig. 4 and 8, two keys 300 are arranged side by side, the corners of the backs of the two keys 300 that face away from each other are respectively provided with a top leg 310, and the corners of the two keys 300 that face away from each other are provided with an arc transition.

In one embodiment, as shown in fig. 3 to 5, the self-generating module 400 includes a circuit board 410 and a piezoelectric sheet 420, a plurality of trigger switches 411 are disposed at intervals on the edge of the front surface of the circuit board 410, the piezoelectric sheet 420 is disposed between the circuit board 410 and the floating plate 200, and the piezoelectric sheet 420 can be electrically connected to the circuit board 410 through a conductive wire.

The back of the face housing 120 may be provided with a plurality of fixing posts 124, the circuit board 410 may 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 be screwed with the fixing posts 124, so as to realize the assembly and fixation between the circuit board 410 and the face housing 120. It is understood that the circuit board 410 may not be assembled with the front case 120, and the circuit board 410 may be mounted and fixed in the bottom case 110.

In an embodiment, as shown in fig. 3, 4 and 8, a plurality of columns 210 are disposed on the back surface of the floating plate 200, each column 210 is disposed in one-to-one correspondence with the position of each top leg 310, and when the key 300 is not pressed, a space is formed between each column 210 and the corresponding trigger switch 411; when one key 300 is pressed, the top leg 310 abuts against the edge of the front face of the floating plate 200, so that one upright column 210 in the area corresponding to the floating plate 200 abuts against the trigger switch 411 corresponding to the self-generating module 400, and the trigger switch 411 is triggered by the upright column 210 and then sends a corresponding control signal to the controlled equipment.

As shown in fig. 3 and 8, the top legs 310 have a cross-shaped cross-section, and the casing 100 has through holes 126 slightly larger than the top legs 310 at positions corresponding to the top legs 310. As shown in fig. 3 and 7, the column 210 on the back of the floating plate 200 is generally cylindrical, and one end of the column far away from the floating plate 200 is provided with a round head to avoid scratching the trigger switch 411 on the self-generating module 400.

As shown in fig. 3, 6 and 7, each corner of the floating plate 200 may be provided with a chamfer, specifically, a chamfer of 45 degrees; the positions of the front surface of the floating plate 200 near the corners can be respectively provided with the arc protrusions 230, the positions of the back surface of the front shell 120 corresponding to the arc protrusions 230 can be respectively recessed to form adaptive arc grooves, at least a part of the arc protrusions 230 are contained in the corresponding arc grooves, when the key 300 is not pressed, the top leg 310 of the back surface of the key 300 is contacted with the arc protrusions 230, when one end of the key 300 is pressed, the top leg 310 is contacted with the arc protrusions 230, and then the corresponding side of the floating plate 200 is distorted and deformed towards the direction of the self-generating module 400.

In an embodiment, as shown in fig. 3, 4 and 8, the self-generating module 400 further includes a base 430, the periphery of the piezoelectric sheet 420 is fixed on the base 430, and a receiving groove 431 is formed in a position of the base 430 corresponding to the piezoelectric sheet 420 in a recessed manner to receive the piezoelectric sheet 420 that is deformed by a force. A notch 432 is formed on the base 430 at a position corresponding to each trigger switch 411, and the pillar 210 passes through the notch 432 and faces the trigger switch 411 at the corresponding position. That is, 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, so that the shielding effect of the metal sheet 421 in the piezoelectric sheet 420 is reduced, and the attenuation of radio frequency signals is reduced.

Be equipped with chip, emission module and energy storage module on the circuit board 410, press the kinetic energy that button 300 produced and convert and save in energy storage module after the electric energy, the monitoring of button 300 is the judgement of doing the keyboard through the keyboard scanning principle by the chip, and then judges the position of button 300, confirms different sign indicating number values, is launched by emission module again.

As shown in fig. 4 and 9, the front surface of the base 430 may be provided with a plurality of positioning protrusions 434, and the corresponding position of the metal sheet 421 is provided with a positioning hole, so as to facilitate the rapid assembly of the piezoelectric sheet 420.

It is to be understood that the self-generating module 400 is not limited to the piezoelectric power generation structure, and other structures capable of converting kinetic energy into electric energy may be used.

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

In an embodiment, the piezoelectric material layer 422 may be a piezoelectric ceramic sheet, or may be other materials capable of forming electric energy after being deformed by pressure.

In one embodiment, the metal sheet 421 can be, but is not limited to, a copper sheet, a tinplate sheet or a stainless steel sheet; the metal sheet 421 is electrically connected to the circuit board 410 by a conductive wire. As shown in fig. 4 and 5, a pad 423 may be disposed at a position of the metal sheet 421 close to the edge, the conductive wire is welded and fixed by the pad 423, and an avoiding hole 240 is disposed at a position of the floating plate 200 corresponding to the pad 423 to avoid the pad 423. The metal sheet 421 and the piezoelectric ceramic sheet are both circular and coaxially arranged, the metal sheet 421 can be adhered and fixed on the back of the piezoelectric ceramic sheet, and the diameter of the metal sheet 421 is larger than that of the piezoelectric ceramic sheet.

As shown in fig. 4, 5 and 9, the metal sheet 421 has an extending edge extending from the piezoelectric material layer 422 at the periphery thereof, the extending edge is abutted against and fixed on the base 430, and the extending edge can be fixed on the base 430 by adhesion. The edge of the metal sheet 421 is opposite to the protruding portion of the piezoelectric sheet 420, and the protruding portion of the metal sheet 421 is fixedly connected to the base 430, specifically, may be fixedly bonded by an industrial adhesive. One end of the submount 430 near the pad 423 is provided with a through hole 433 to facilitate the conductive wire to pass through.

In one embodiment, as shown in fig. 4, 5 and 7, a boss 250 is formed in a protruding manner in a region of the bottom surface of the floating plate 200 corresponding to the piezoelectric sheet 420, the cross section of the boss 250 is circular, the bottom surface of the boss 250 protrudes relative to the bottom surface of the floating plate 200, the boss 250 and the piezoelectric sheet 420 are arranged coaxially, and the diameter of the boss 250 is set to be smaller than the cross section area of the piezoelectric material layer 420; when one end of any key 300 is pressed, the boss 250 abuts against the piezoelectric sheet 420. When the key 300 is not pressed, the boss 250 and the piezoelectric sheet 420 have a gap therebetween, or the boss is in contact with the piezoelectric sheet 420 but the piezoelectric sheet 420 is not deformed; when one end of one of the keys 300 is pressed, the boss 250 abuts against the piezoelectric sheet 420. The surface of the boss 250 opposite to the piezoelectric sheet 420 may be a curved surface, and may specifically be a spherical surface, which is beneficial to controlling the deformation amount of the piezoelectric sheet 420 at any position when the piezoelectric sheet is deformed by a force.

The front surface of the floating plate 200 is concavely provided with a groove 220 with a circular cross section, and two concave grooves 221 are formed on the bottom wall of the groove 220, so that the total thickness of the assembled parts can be further reduced, and the product can be made thinner. The back surface of the floating plate 200 is recessed on the circumference of the boss 250 to form an annular groove 260, so that the thickness of the floating plate 200 near the circumference of the boss 250 is thinner, the elasticity of the boss 250 can be improved, and the elastic contact state is formed when the boss 250 abuts against the piezoelectric sheet 420.

The above are merely alternative embodiments of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A many buttons are from generating switching device which characterized in that: the method comprises the following steps:

a housing;

2. The multi-button self-generating switch device as claimed in claim 1, wherein: and when one end of any one key is pressed, the footstep corresponding to the key abuts against the floating plate, so that one side corresponding to the floating plate is deformed or inclined.

3. The multi-key self-generating switch device according to claim 2, characterized in that: the self-generating module comprises a circuit board and piezoelectric patches, wherein the trigger switches are arranged at the edge of the front surface of the circuit board at intervals, the piezoelectric patches are arranged between the circuit board and the floating plate, and the piezoelectric patches are electrically connected with the circuit board through conducting wires.

4. The multi-button self-generating switch device as claimed in claim 3, wherein: the back of the floating plate is provided with a plurality of upright columns, the positions of the upright columns and the positions of the footsteps are arranged in a one-to-one correspondence mode, and the upright columns can trigger corresponding trigger switches when the corresponding keys are pressed.

5. The multi-button self-generating switch device as claimed in claim 4, wherein: the piezoelectric device comprises a shell, and is characterized in that a base is arranged in the shell, the periphery of each piezoelectric sheet is fixed on the base, notches are formed in the positions, corresponding to the trigger switches, of the bases, and accommodating grooves are formed in the positions, corresponding to the piezoelectric sheets, of the bases in a concave mode so as to accommodate the piezoelectric sheets deformed under stress.

6. The multi-key self-generating switch device according to claim 5, characterized in that: the piezoelectric sheet comprises a metal sheet and a piezoelectric material layer adhered to the metal sheet, the cross section of the piezoelectric material layer is circular, the cross section area of the accommodating groove is larger than that of the piezoelectric material layer, the periphery of the metal sheet is provided with an extending edge extending out relative to the piezoelectric material layer, and the extending edge is abutted and fixed on the base.

7. The multi-button self-generating switch device as claimed in claim 6, wherein: the piezoelectric material layer is a piezoelectric ceramic piece.

8. The multi-button self-generating switch device as claimed in claim 6, wherein: the metal sheet is a copper sheet, a stainless steel sheet or a tinplate.

9. The multi-button self-generating switch device as claimed in claim 6, wherein: the back of the floating plate protrudes from the area corresponding to the piezoelectric sheet to form a boss with a circular cross section, the boss and the piezoelectric sheet are coaxially arranged, the diameter of the boss is smaller than the cross section area of the piezoelectric material layer, and when one end of any one key is pressed, the boss is abutted to the piezoelectric sheet.

10. The multi-button self-generating switch device as claimed in claim 1, wherein: the shell comprises a bottom shell and a face shell which are connected, the bottom shell and the face shell are enclosed to form an accommodating cavity, the floating plate and the self-generating module are accommodated in the accommodating cavity, the keys are mounted on the front face of the face shell, a groove is formed in the top surface of the face shell in a recessed mode, and at least part of the keys are accommodated in the groove.

11. The multi-key self-generating switch device according to claim 10, wherein: the keys are arranged on the front surface of the face shell side by side.

12. The multi-key self-generating switch device according to claim 10, wherein: the inner bottom wall of the groove is concavely provided with a containing groove along the width direction, the back surface of the key is convexly provided with a convex rib which is matched with the containing groove, one part of the convex rib is contained in the containing groove, and a screw is adopted to penetrate through the face shell and is connected with the convex rib so as to fix the key on the face shell.

13. The multi-button self-generating switch device as claimed in claim 12, wherein: the intermediate position of protruding muscle is equipped with the spliced pole, the face-piece corresponds the through-hole of adaptation is seted up to the position of spliced pole, the one end of spliced pole for protruding muscle stretches out and stretches into in the through-hole, the internal thread hole has been seted up to the spliced pole, the screw with the internal thread hole spiro union.

14. The multi-button self-generating switch device as claimed in claim 12, wherein: the front surface of the floating plate is concavely provided with a plurality of concave grooves, and the head of each screw is accommodated in the corresponding concave groove.

15. The multi-key self-generating switch device according to claim 10, wherein: the inside wall interval of face-piece is provided with a plurality of back-offs, the inside wall of drain pan corresponds the position of back-off is provided with the adaptation the draw-in groove of back-off, the face-piece passes through the back-off with the lock realization of draw-in groove with the connection of drain pan is fixed.