阅读说明：本技术 一种耐高温型薄膜开关 (High-temperature-resistant membrane switch ) 是由 冷国徽 孙荣 曾庆双 冷志强 于 2021-07-30 设计创作，主要内容包括：本发明公开了一种耐高温型薄膜开关,包括触发机构,触发机构包括开关面板和盒体,所述开关面板外设有盖体,所述开关面板的下端固定连接有多块限位板,所述盖体与盒体之间通过多个卡接机构卡接,所述开关面板上设有多个按压键,多个所述按压键的下方均设有按压机构,所述开关面板的下方设有电路板,所述电路板与开关面板之间通过多块连接块固定连接固定连接。本发明开关面板上的按压键能够稳定弹出,使用效果较好且可以对开关面板进行散热,避免高温对其造成损坏。(The invention discloses a high-temperature-resistant type membrane switch which comprises a trigger mechanism, wherein the trigger mechanism comprises a switch panel and a box body, a cover body is arranged outside the switch panel, the lower end of the switch panel is fixedly connected with a plurality of limiting plates, the cover body and the box body are clamped through a plurality of clamping mechanisms, a plurality of pressing keys are arranged on the switch panel, pressing mechanisms are arranged below the pressing keys, a circuit board is arranged below the switch panel, and the circuit board is fixedly connected with the switch panel through a plurality of connecting blocks. The press key on the switch panel can be stably ejected out, the use effect is good, the switch panel can be cooled, and the switch panel is prevented from being damaged by high temperature.)

1. The utility model provides a high temperature resistant type membrane switch, includes trigger mechanism, its characterized in that, trigger mechanism includes flush mounting plate of switch (1) and box body (2), flush mounting plate of switch (1) is equipped with lid (3) outward, the lower extreme fixedly connected with polylith limiting plate (4) of flush mounting plate of switch (1), through a plurality of clamping mechanism (5) joint between lid (3) and box body (2), be equipped with a plurality of pressing key (6) on flush mounting plate of switch (1), it is a plurality of the below of pressing key (6) all is equipped with pressing mechanism (7), the below of flush mounting plate of switch (1) is equipped with circuit board (8), through polylith connecting block (9) fixed connection between circuit board (8) and flush mounting plate of switch (1).

2. The membrane switch of claim 1, wherein the cover (3) is vertically disposed, and a cross-section of one side of the cover (3) is L-shaped.

3. The high-temperature-resistant membrane switch according to claim 1, further comprising a bearing mechanism, wherein the clamping mechanism (5) comprises a clamping plate (10) fixedly connected with the inner side wall of the cover body (3), a through hole (11) matched with the clamping plate (10) penetrates through the switch panel (1) from top to bottom, a wedge block (12) is fixedly connected to one side of the clamping plate (10) far away from the middle of the cover body (3), and a through hole (13) matched with the wedge block (12) is formed in the box body (2).

4. A membrane switch according to claim 3, characterised in that the end of the wedge (12) remote from the snap plate (10) is provided with a smooth bevel, said bevel facing downwards.

5. The high-temperature-resistant membrane switch according to claim 1, wherein the pressing mechanism (7) comprises an arc-shaped elastic plate (14) arranged below the pressing key (6), the front end and the rear end of the arc-shaped elastic plate (14) are both fixedly connected with connecting plates (15), one ends of the two connecting plates (15) far away from the arc-shaped elastic plate (14) are both fixedly connected with anti-falling blocks (35), the two connecting plates (15) are both slidably sleeved with limiting blocks (16), the two limiting blocks (16) are respectively fixedly connected with two limiting plates (4), a T-shaped plate (17) is fixedly connected below the arc-shaped elastic plate (14), a contact plate (18) is arranged below the T-shaped plate (17), a plurality of buffer mechanisms (19) are arranged between the contact plate (18) and the T-shaped plate (17), a sliding groove (20) is arranged at the lower end of the T-shaped plate (17), a sliding rod (21) is connected in the sliding groove (20) in a sliding mode, and the lower end of the sliding rod (21) is fixedly connected with the upper end of the contact plate (18).

6. The membrane switch of claim 5, wherein the buffer mechanism (19) comprises a buffer groove (22) arranged at the lower end of the T-shaped plate (17), a limiting rod (23) is fixedly connected in the buffer groove (22), a buffer block (24) and a spring (25) are sleeved outside the limiting rod (23), the buffer block (24) is slidably connected with the limiting rod (23) and the inner side wall of the buffer groove (22), two ends of the spring (25) are fixedly connected with the buffer block (24) and the inner side wall of the buffer groove (22), the lower end of the buffer block (24) is rotatably connected with a deflection plate (26), and the lower end of the deflection plate (26) is rotatably connected with the upper end of the contact plate (18).

7. The high-temperature-resistant membrane switch according to claim 1, further comprising a heat dissipation mechanism, wherein the heat dissipation mechanism comprises two partition plates (27) fixedly connected with the inner bottom of the box body (2), fans (28) are arranged on the opposite sides of the two partition plates (27), the two fans (28) are rotatably connected with the inner bottom of the box body (2), two heat dissipation channels (29) respectively matched with the two fans (28) are arranged on the box body (2), a motor (30) is fixedly connected to the portion, located between the two partition plates (27), of the box body (2), and a driving shaft of the motor (30) is in transmission connection with the two fans (28) through a transmission mechanism (31).

8. The membrane switch of claim 7, wherein the transmission mechanism (31) comprises a first pulley (32) and two second pulleys (33), the two second pulleys (33) are respectively and coaxially and fixedly connected with the two fans (28), the first pulley (32) is coaxially and fixedly connected with a driving shaft of the motor (30), the first pulley (32) is in transmission connection with the two second pulleys (33) through a belt, and transmission holes matched with the belt are formed in the two partition plates (27).

9. The membrane switch of claim 1, wherein a plurality of ventilation holes (34) are formed in the switch panel (1) in a vertical direction.

Technical Field

The invention relates to the technical field of membrane switches, in particular to a high-temperature-resistant membrane switch.

Background

The membrane switch is also called as a touch keyboard, adopts an integral sealing structure formed by combining a plurality of layers of planes, is a novel integrated light-collecting, mechanical and electrical electronic component which seals a key switch, a panel, a mark, a symbol display and a lining plate together, is a fundamental change of the appearance structure of an electronic product, can replace the keys of conventional discrete components, and can more reliably execute the task of an operating system.

When the existing membrane switch works under a high-temperature condition, the heat dissipation effect is poor, the membrane switch is easy to damage due to high temperature, and when the membrane switch works, the rebound effect of the membrane switch key is poor due to the influence of high temperature, so that the situation that the key cannot be popped up after being pressed can often occur.

Therefore, we propose a high temperature resistant membrane switch to solve the above problems.

Disclosure of Invention

The invention aims to solve the problems that a membrane switch in the prior art is poor in heat dissipation effect and a key is poor in rebound effect under a high-temperature condition, and provides a high-temperature-resistant membrane switch.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a high temperature resistant type membrane switch, includes trigger mechanism, and trigger mechanism includes flush mounting plate of switch and box body, flush mounting plate of switch is equipped with the lid outward, flush mounting plate of switch's lower extreme fixedly connected with polylith limiting plate, through a plurality of clamping mechanism joints between lid and the box body, flush mounting plate of switch is last to be equipped with a plurality of keys of pressing, and is a plurality of the below of pressing the key all is equipped with pressing mechanism, flush mounting plate of switch's below is equipped with the circuit board, through polylith connecting block fixed connection between circuit board and the flush mounting plate of switch.

Preferably, the cover body is vertically arranged in a penetrating manner, and the cross section of one side of the cover body is arranged in an L shape.

Preferably, still including bearing mechanism, clamping mechanism include with lid inside wall fixed connection's joint board, run through from top to bottom and be equipped with the perforation that matches with the joint board, one side fixed connection wedge in the middle of the lid is kept away from to the joint board, be equipped with on the box body with wedge assorted through-hole.

Preferably, one end of the wedge-shaped block, which is far away from the clamping plate, is provided with a smooth inclined surface, and the inclined surface faces downwards.

Preferably, pressing means is including setting up the arc elastic plate according to the press key below, the equal fixedly connected with connecting plate in both ends around the arc elastic plate, two the equal fixedly connected with anticreep piece in one end that the arc elastic plate was kept away from to the connecting plate, two the equal sliding sleeve of connecting plate is equipped with the stopper, two the stopper respectively with two limiting plate fixed connection, the below fixedly connected with T template of arc elastic plate, the below of T template is equipped with the contact plate, be equipped with a plurality of buffer gear between contact plate and the T template, the lower extreme of T template is equipped with the spout, sliding connection has the slide bar in the spout, the lower extreme of slide bar and the upper end fixed connection of contact plate.

Preferably, buffer gear is including setting up the dashpot at T template lower extreme, fixedly connected with gag lever post in the dashpot, the gag lever post overcoat is equipped with buffer block and spring, equal sliding connection of buffer block and gag lever post and dashpot inside wall, the both ends of spring respectively with buffer block and dashpot inside wall fixed connection, the lower extreme of buffer block rotates and is connected with the deflector, the lower extreme of deflector rotates with the upper end of contact plate to be connected.

Preferably, still include heat dissipation mechanism, heat dissipation mechanism include with box body bottom fixed connection's two baffles, two one side that the baffle was carried on the back mutually all is equipped with the fan, two the fan all rotates with the box body inner bottom to be connected, be equipped with on the box body two respectively with two fan assorted heat dissipation channel, the part fixedly connected with motor that the box body is located between two baffles, be connected through the drive mechanism transmission between the drive shaft of motor and two fans.

Preferably, drive mechanism includes first belt pulley and two second belt pulleys, two the second belt pulley respectively with two coaxial fixed connection of fan, the coaxial fixed connection of drive shaft of first belt pulley and motor, be connected through belt transmission between first belt pulley and the two second belt pulleys, two all be equipped with on the baffle with belt phase-match transmission hole.

Preferably, a plurality of air holes are formed in the switch panel in a penetrating mode.

Compared with the prior art, the invention has the beneficial effects that:

1. by arranging the trigger mechanism and arranging the arc-shaped elastic plate below the press key, even if the switch panel has poor rebound effect due to a high-temperature environment, the switch panel can be driven to rebound due to the existence of the arc-shaped elastic plate, so that the situation that the switch panel is difficult to rebound and the press key cannot pop up is avoided;

2. through setting up heat dissipation mechanism, drive two fans through the motor and rotate, two fans induced draft through the heat dissipation channel and pass through the both sides of circuit board and via a plurality of bleeder vents discharge, can take away the heat on flush mounting plate's of flush mounting plate self at the in-process that the air flows, avoid flush mounting plate self high temperature, cause the damage, influence its performance.

The press key on the switch panel can be stably ejected out, the use effect is good, the switch panel can be cooled, and the switch panel is prevented from being damaged by high temperature.

Drawings

Fig. 1 is a front perspective view of a high temperature resistant membrane switch according to the present invention;

fig. 2 is a schematic top view of a box body of a high temperature resistant membrane switch according to the present invention;

fig. 3 is a schematic top view of a switch panel in a high temperature resistant membrane switch according to the present invention;

fig. 4 is a schematic side view of a switch panel in a high temperature resistant membrane switch according to the present invention;

fig. 5 is a schematic partial sectional view of a switch panel in a high temperature resistant membrane switch according to the present invention;

FIG. 6 is an enlarged view taken at A in FIG. 5;

fig. 7 is a perspective view of an arc-shaped elastic plate in a high temperature resistant membrane switch according to the present invention.

In the figure: 1 switch panel, 2 box bodies, 3 cover bodies, 4 limit plates, 5 clamping mechanisms, 6 pressing keys, 7 pressing mechanisms, 8 circuit boards, 9 connecting blocks, 10 clamping plates, 11 through holes, 12 wedge-shaped blocks, 13 through holes, 14 arc-shaped elastic plates, 15 connecting plates, 16 limit blocks, 17T-shaped plates, 18 contact plates, 19 buffer mechanisms, 20 sliding grooves, 21 sliding rods, 22 buffer grooves, 23 limit rods, 24 buffer blocks, 25 springs, 26 deflection plates, 27 partition plates, 28 fans, 29 heat dissipation channels, 30 motors, 31 transmission mechanisms, 32 first belt pulleys, 33 second belt pulleys, 34 air holes and 35 anti-dropping blocks.

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-7, a high temperature resistant type membrane switch, which includes a trigger mechanism, the trigger mechanism includes a switch panel 1 and a box body 2, it should be noted that a plurality of air holes 34 are provided through the switch panel 1 from top to bottom, a cover body 3 is provided outside the switch panel 1, it should be noted that the cover body 3 is provided through the top and bottom, a cross section of one side of the cover body 3 is provided in an L shape, a plurality of limit plates 4 are fixedly connected to a lower end of the switch panel 1, the cover body 3 is clamped to the box body 2 through a plurality of clamping mechanisms 5, the clamping mechanism 5 includes a clamping plate 10 fixedly connected to an inner side wall of the cover body 3, a through hole 11 matched with the clamping plate 10 is provided through the switch panel 1 from top to bottom, one side of the clamping plate 10 far away from the middle of the cover body 3 is fixedly connected to a wedge block 12, further, one end of the wedge block 12 far away from the clamping plate 10 is provided with a smooth inclined plane, the ramp faces downward.

In the invention, a through hole 13 matched with a wedge block 12 is arranged on a box body 2, a plurality of pressing keys 6 are arranged on a switch panel 1, a pressing mechanism 7 is arranged below each pressing key 6, it should be noted that the pressing mechanism 7 comprises an arc-shaped elastic plate 14 arranged below the pressing key 6, connecting plates 15 are fixedly connected to the front end and the rear end of the arc-shaped elastic plate 14, anti-falling blocks 35 are fixedly connected to one ends of the two connecting plates 15 far away from the arc-shaped elastic plate 14, limiting blocks 16 are slidably sleeved outside the two connecting plates 15, the two limiting blocks 16 are respectively fixedly connected with the two limiting plates 4, a T-shaped plate 17 is fixedly connected to the lower portion of the arc-shaped elastic plate 14, a contact plate 18 is arranged below the T-shaped plate 17, a plurality of buffer mechanisms 19 are arranged between the contact plate 18 and the T-shaped plate 17, and it should be noted that the buffer mechanisms 19 comprise buffer grooves 22 arranged at the lower end of the T-shaped plate 17.

According to the invention, a limiting rod 23 is fixedly connected in a buffer groove 22, a buffer block 24 and a spring 25 are sleeved outside the limiting rod 23, the buffer block 24 is in sliding connection with the limiting rod 23 and the inner side wall of the buffer groove 22, two ends of the spring 25 are respectively fixedly connected with the buffer block 24 and the inner side wall of the buffer groove 22, the lower end of the buffer block 24 is rotatably connected with a deflection plate 26, the lower end of the deflection plate 26 is rotatably connected with the upper end of a contact plate 18, a sliding groove 20 is arranged at the lower end of a T-shaped plate 17, a sliding rod 21 is slidably connected in the sliding groove 20, the lower end of the sliding rod 21 is fixedly connected with the upper end of the contact plate 18, a circuit board 8 is arranged below a switch panel 1, the circuit board 8 is fixedly connected with the switch panel 1 through a plurality of connecting blocks 9, and a heat dissipation mechanism is further included and comprises two partition plates 27 fixedly connected with the inner bottom of a box body 2.

In the invention, fans 28 are arranged on the opposite sides of two partition boards 27, the two fans 28 are rotatably connected with the bottom in the box body 2, two heat dissipation channels 29 respectively matched with the two fans 28 are arranged on the box body 2, a motor 30 is fixedly connected to the part of the box body 2 between the two partition boards 27, it should be noted that the motor 3330 can be a centimetre motor and is electrically connected with an external power supply, for the prior art, details are not described, a driving shaft of the motor 30 is in transmission connection with the two fans 28 through a transmission mechanism 31, further, the transmission mechanism 31 comprises a first belt pulley 32 and two second belt pulleys 33, the two second belt pulleys 33 are respectively and fixedly connected with the two fans 28 in a coaxial manner, the first belt pulley 32 is fixedly connected with the driving shaft of the motor 30 in a coaxial manner, and the first belt pulley 32 is in transmission connection with the two second belt pulleys 33 through a belt, the two partition plates 27 are provided with transmission holes matched with the belts.

When the heat dissipation device is used for dissipating heat, the motor 30 drives the first belt pulley 32 to rotate, the first belt pulley 32 drives the two second belt pulleys 33 to rotate through the belt, the two second belt pulleys 33 drive the two fans 28 to rotate, and the two fans 28 suck air through the heat dissipation channel 29 and are discharged through the plurality of air holes 34 through two sides of the circuit board 8.

When the circuit board pressing device is used, the pressing key 6 is pressed, the pressing key 6 drives the arc-shaped elastic plate 14 to deform and press downwards, the arc-shaped elastic plate 14 drives the T-shaped plate 17 to lift, the T-shaped plate 17 drives the contact plate 18 to lift through the two deflection plates 26, so that the circuit board 8 can be pressed, after a hand is loosened, the pressing key 6 resets under the elastic force action of the pressing key 6 and the arc-shaped elastic plate 14, so that the contact plate 18 can be separated from the circuit board 8, the circuit board 8 can be buffered when being pressed, the situation of high pressure cannot be generated, and the circuit board 8 is prevented from being pressed and damaged.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.