CN215988532U

CN215988532U - Matrix type thin film switch

Info

Publication number: CN215988532U
Application number: CN202122387600.6U
Authority: CN
Inventors: 陈小辉
Original assignee: Taikeming (dongguan) Membrane Products Technology Ltd
Current assignee: Taikeming (dongguan) Membrane Products Technology Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-03-08
Anticipated expiration: 2031-09-30

Abstract

The utility model discloses a matrix type thin film switch, and relates to the technical field of switches. The utility model provides a matrix membrane switch, includes luminous mechanism, luminous mechanism includes the pressure foil gage, pressure foil gage top electric connection has the pressure signal transmission line, pressure signal transmission line one end electric connection has pressure-sensitive circuit, pressure-sensitive circuit one side electric connection has luminous control line, luminous control line one end electric connection has the emitting diode strip. According to the utility model, through the design of the pressure strain gauge and the pressure-sensitive circuit, the working state of the light-emitting diode strip can be controlled only by touching the film panel, so that good illumination can be obtained on the film switch, and the film switch is more convenient to use; through pluggable pressure signal transmission line, the contact between control pressure foil gage and the pressure-sensitive circuit, under the sufficient condition of ambient light, thoroughly close the emitting diode strip, prevent that the mistake from touching and produce extra light interference operation, bring higher alternative.

Description

Matrix type thin film switch

Technical Field

The utility model relates to the technical field of switches, in particular to a matrix type thin film 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. However, the membrane switch has a small volume, flat keys and small screen power, so that workers cannot observe and operate easily in the dark environment; however, some membrane switches with their light sources cannot turn off the light sources under the condition of sufficient ambient light, and interfere with the work of workers. Therefore, a matrix type thin film switch has been developed.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a matrix type thin film switch, so as to solve the problems mentioned above.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a matrix film switch, includes the film mechanism, the film mechanism includes the film panel, film panel bottom end fixedly connected with foil gage-panel doubling, foil gage-panel doubling bottom fixedly connected with light-emitting mechanism, light-emitting mechanism includes the pressure foil gage, pressure foil gage top electric connection has the pressure signal transmission line, pressure signal transmission line one end electric connection has pressure-sensitive circuit, pressure-sensitive circuit one side electric connection has the luminous control line, luminous control line one end electric connection has the emitting diode strip, just emitting diode strip and film panel fixed connection.

Preferably, one end of the film panel is fixedly connected with a waterproof gasket, and a film key is movably connected inside the waterproof gasket.

Preferably, the bottom end of the pressure strain gauge is fixedly connected with a control circuit-strain gauge rubber clamp, the control circuit-strain gauge rubber clamp is fixedly connected with a control circuit upper layer, the bottom end of the control circuit-strain gauge rubber clamp is fixedly connected with a rubber clamping isolation layer, the rubber clamping isolation layer and the bottom end of the rubber clamping isolation layer are fixedly connected with a control circuit lower layer.

Preferably, the inner side of the upper layer of the control circuit is movably connected with an upward convex elastic sheet, one end of the upward convex elastic sheet is fixedly connected with a circuit contact, and one end of the circuit contact is communicated to the other side of the upward convex elastic sheet.

Preferably, the top end of the lower layer of the control circuit is electrically connected with a display screen circuit, and one end of the display screen circuit is electrically connected with a thin film display screen.

Preferably, the bottom end of the lower layer of the control circuit is electrically connected with a signal transmission line.

Compared with the prior art, the utility model has the beneficial effects that:

(1) this matrix membrane switch through the design of pressure foil gage and pressure-sensitive circuit for the operating condition that the staff only need touch membrane panel just can control the emitting diode strip, makes can obtain good illumination on the membrane switch, makes membrane switch's use more convenient.

(2) This matrix membrane switch, through pluggable pressure signal transmission line, the contact between control pressure foil gage and the pressure-sensitive circuit under the sufficient condition of ambient light, thoroughly closes the emitting diode strip, prevents that the mistake from touching and produces extra light interference operation, brings higher alternative.

Drawings

FIG. 1 is an isometric view of the present invention;

FIG. 2 is an expanded view of the internal structure of the present invention;

fig. 3 is a partial structural schematic diagram of the present invention.

In the figure: 1. a film mechanism; 101. a thin film display screen; 102. a control circuit upper layer; 103. a display screen circuit; 104. a control circuit lower layer; 105. a laminated isolation layer; 106. a convex elastic sheet; 107. a circuit contact; 108. a signal transmission line; 109. control circuit-strain gauge doubling; 110. strain gage-panel lamination; 111. a film panel; 112. a thin film key; 113. a waterproof gasket; 2. a light emitting mechanism; 201. A pressure strain gauge; 202. a pressure signal transmission line; 203. a voltage-sensitive circuit; 204. a light emission control line; 205. light emitting diode bars.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Further, it will be appreciated that the dimensions of the various elements shown in the figures are not drawn to scale, for ease of description, and that the thickness or width of some layers may be exaggerated relative to other layers, for example.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined or illustrated in one figure, it will not need to be further discussed or illustrated in detail in the description of the following figure.

As shown in fig. 1-3, the present invention provides a technical solution: a matrix type membrane switch comprises a membrane mechanism 1, wherein the membrane mechanism 1 comprises a membrane panel 111, and a key hole is formed in the membrane panel 111 and used for accommodating a key arranged on the membrane panel. The bottom end of the thin film panel 111 is fixedly connected with a strain gauge-panel laminated adhesive 110, all laminated adhesive hoppers used in the embodiment are required to have strong viscous anti-aging performance, and sometimes require high temperature resistance and water resistance according to the use occasions of the thin film switch, so that the purpose of tightly combining all parts of the thin film switch is achieved, and the laminated adhesive thickness is as thin as possible, so as to avoid influencing the response precision of the thin film switch. The bottom end of the strain gauge-panel laminating 110 is fixedly connected with a light-emitting mechanism 2, the light-emitting mechanism 2 comprises a pressure strain gauge 201, and the pressure strain gauge 201 is a piezoresistor and needs to be connected in a circuit. When the pressure strain gauge 201 is deformed by pressure, the resistance thereof is also changed, so that the current in the circuit is changed, and an electrical signal is generated. In this embodiment, the pressure strain gauge 201 should be as thin as possible to improve the sensitivity of the pressure strain gauge 201, and the pressure strain gauge 201 should also be provided with an opening corresponding to the key hole, and the area of the opening is larger than that of the key hole, so that the deformation of the pressure strain gauge 201 is not caused when the key is pressed on the film panel 111, and thus the electrical signal in the circuit can be kept relatively stable. The top end of the pressure strain gauge 201 is electrically connected with a pressure signal transmission line 202, one end of the pressure signal transmission line 202 is electrically connected with a pressure-sensitive circuit 203, one side of the pressure-sensitive circuit 203 is electrically connected with a light-emitting control line 204, one end of the light-emitting control line 204 is electrically connected with a light-emitting diode bar 205, and after an electric signal is transmitted to the pressure-sensitive circuit 203, the pressure-sensitive circuit 203 can send a control signal to enable the working state of the light-emitting diode bar 205 to change. It should be noted that the led strip 205 is a hollow box structure in which leds are mounted, and the bottom side of the interior of the box is coated with a reflective coating, and the top layer is removed and the other surfaces are opaque. When the led emits light, most of the light is directed to the area enclosed by the led bars 205 under the guidance of the internal structure of the led bars 205. In this embodiment, the led strips 205 are fixedly connected to the film panel 111, so that when the leds emit light, the film panel 111 is illuminated. If the user does not want the led to emit light, one end of the pressure signal transmission line 202 can be pulled out.

One end of the membrane panel 111 is fixedly connected with a waterproof gasket 113 to prevent moisture from permeating into the membrane switch to corrode a circuit, and the membrane key 112 is movably connected inside the waterproof gasket 113. Meanwhile, the bottom end of the pressure strain gauge 201 is fixedly connected with the control circuit-strain gauge rubber clamp 109, the bottom end of the control circuit-strain gauge rubber clamp 109 is fixedly connected with the control circuit upper layer 102, and it should be noted that the control circuit upper layer 102 is also provided with a hole corresponding to the key hole on the film panel 111, and the size of the hole is equivalent to that of the key hole. An upper convex elastic sheet 106 is movably connected to the inner side of the hole, one end of the upper convex elastic sheet 106 is fixedly connected with a circuit contact 107, and one end of the circuit contact 107 is communicated to the other side of the upper convex elastic sheet 106. It should be noted that the upper end of the circuit contact 107 is close to the bottom end of the membrane key 112, and when the membrane key 112 is pressed down, the pressure is conducted to the upper elastic sheet 106 along with the circuit contact 107, so that the upper elastic sheet is concave, and the upper elastic sheet is bounced to reset after the external force is over. The bottom end of the control circuit upper layer 102 is fixedly connected with a laminated isolation layer 105, the bottom end of the laminated isolation layer 105 is fixedly connected with a control circuit lower layer 104. The control circuit lower layer 104 is etched with logic circuits, but breakpoints are arranged according to the positions of keys, and when the upper convex elastic sheet 106 is concave, the circuit contact 107 connected with the elastic sheet just contacts the breakpoints in the circuits on the control circuit lower layer 104. The control circuit upper layer 102 is also provided with a circuit and is energized, so that the circuit contact 107 is contacted with the control circuit lower layer 104 to conduct current into the control circuit lower layer 104 and conduct an electric signal. In this embodiment, the lower half of the circuit contact 107 is made of metal, and the portion above the upper elastic tab 106 is made of insulating material, so as to prevent the user from getting an electric shock. Control circuit lower floor 104 top electric connection has display screen circuit 103, and display screen circuit 103 one end electric connection has thin film display 101, and the signal of every breakpoint department output is different in control circuit lower floor 104, and these electric signals are shown on thin film display 101 through display screen circuit 103, and the person of facilitating the use obtains audio-visual feedback. The bottom end of the lower layer 104 of the control circuit is electrically connected with a signal transmission line 108 for connecting with an electrical appliance and controlling the electrical appliance through a membrane switch.

When using this utility model, the staff need connect pressure signal transmission line 202 earlier, press the position of non-button on the film panel 111 after that, arouse pressure strain gauge 201 deformation for pressure-sensitive circuit 203 changes the operating condition of emitting diode strip 205, makes it give out light, illuminates film panel 111 and film display 101. When the worker uses the membrane switch, the light emitting diode bar 205 can be turned off by pressing the membrane panel 111 again.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A matrix membrane switch, includes membrane mechanism (1), its characterized in that: film mechanism (1) includes film panel (111), film panel (111) bottom fixedly connected with foil gage-panel doubling (110), foil gage-panel doubling (110) bottom fixedly connected with light-emitting mechanism (2), light-emitting mechanism (2) are including pressure foil gage (201), pressure foil gage (201) top electrically connected has pressure signal transmission line (202), pressure signal transmission line (202) one end electrically connected has pressure-sensitive circuit (203), pressure-sensitive circuit (203) one side electrically connected has luminous control line (204), luminous control line (204) one end electrically connected has emitting diode strip (205), just emitting diode strip (205) and film panel (111) fixed connection.

2. A matrix-type membrane switch according to claim 1, further comprising: one end of the film panel (111) is fixedly connected with a waterproof gasket (113), and a film key (112) is movably connected inside the waterproof gasket (113).

3. A matrix-type membrane switch according to claim 1, further comprising: the pressure strain gauge (201) bottom fixedly connected with control circuit-strain gauge doubling (109), control circuit-strain gauge doubling (109) bottom fixedly connected with control circuit upper strata (102), control circuit upper strata (102) bottom fixedly connected with doubling isolation layer (105), doubling isolation layer (105) bottom fixedly connected with control circuit lower floor (104).

4. A matrix-type membrane switch according to claim 3, further comprising: the inner side of the upper layer (102) of the control circuit is movably connected with an upper convex elastic sheet (106), one end of the upper convex elastic sheet (106) is fixedly connected with a circuit contact (107), and one end of the circuit contact (107) is communicated to the other side of the upper convex elastic sheet (106).

5. A matrix-type membrane switch according to claim 3, further comprising: the top end of the lower control circuit layer (104) is electrically connected with a display screen circuit (103), and one end of the display screen circuit (103) is electrically connected with a thin film display screen (101).

6. A matrix-type membrane switch according to claim 3, further comprising: the bottom end of the lower control circuit layer (104) is electrically connected with a signal transmission line (108).