CN209133391U

CN209133391U - A kind of film key of antistatic

Info

Publication number: CN209133391U
Application number: CN201822063120.2U
Authority: CN
Inventors: 张文亮
Original assignee: Dongguan Puluda Electronic Technology Co Ltd
Current assignee: Dongguan Puluda Electronic Technology Co Ltd
Priority date: 2018-12-10
Filing date: 2018-12-10
Publication date: 2019-07-19
Anticipated expiration: 2028-12-10

Abstract

A kind of film key of antistatic, comprising: keycap, thin-film capacitor and elastic slice, keycap include: substrate, calotte and upper wiring board, and the upper surface of calotte from substrate is up raised, and upper wiring board is located at the middle part of calotte；Thin-film capacitor is arranged successively and is formed by upper electrode layer, poly- methacrylate layer and lower electrode layer, thin-film capacitor includes: connecting plate, attachment cap and connecting hole, the upper surface of attachment cap from connecting plate is up raised, connecting hole runs through the middle part of attachment cap upper end, substrate is bonded with connecting plate, calotte is bonded with attachment cap, and attachment cap covers elastic slice；Elastic slice includes: main body and lower wiring board, and lower wiring board is located at the upper surface of main body, upper wiring board, connecting hole and lower wiring board face.Above-mentioned film key can not only play anti-static function, reduce key by extraneous electrostatic damage bring functional deficiency, and manufacturing process is simple, cost is relatively low.

Description

A kind of film key of antistatic

Technical field

The utility model relates to film keys, more particularly, to a kind of film key of antistatic.

Background technique

Film key is deformed downwards by the contact of upper circuit, and conducting is contacted with the pole plate of lower circuit, and finger unclamps Afterwards, upper circuit contact rebound is returned, and circuit disconnects, and a signal is triggered in circuit, to realize control function.Film key is wide The general instrument for being applied to telecommunications, electronic surveying, Industry Control, Medical Devices, auto industry, intelligent toy, household electrical appliance Equal fields.

Chinese patent CN 106783324A discloses a kind of film key with anti-static function, including antistatic backing, Upper transparent membrane, lower transparent membrane, upper conductive layer, printing layer, lower conductiving layer, lead, elastic pellet, antistatic backing is upper transparent The top of diaphragm, upper conductive layer is in the lower section of upper transparent membrane, and lower conductiving layer is in the top of lower transparent membrane, printing layer and elasticity Bead is between upper transparent membrane and lower transparent membrane, and upper conductive layer shape has downward protrusion mouth, and lower conductiving layer shape is Inside recess.The reliability of key can be improved in the structure, reduces key and is lacked by extraneous electrostatic damage bring functionality It loses.

However, although above-mentioned can make key play anti-static function, in upper transparent membrane and lower transparent membrane Between setting elastic pellet will increase technology difficulty and increase manufacturing cost.In addition, the film key is arranged on antistatic backing Protective layer also increases corresponding processing step and manufacturing cost although can be destroyed to avoid antistatic backing simultaneously.

Utility model content

Technical solutions of the utility model provide a kind of antistatic for above situation to solve the above-mentioned problems Film key, the film key include: keycap, thin-film capacitor and elastic slice, and the keycap includes: substrate, calotte and upper route The upper surface of plate, the ducted body that the calotte is, the calotte from the substrate is up raised, and the upper wiring board is located at described The middle part of calotte；The thin-film capacitor is arranged successively and is formed by upper electrode layer, poly- methacrylate layer and lower electrode layer, the thin-film capacitor It include: connecting plate, attachment cap and connecting hole, the attachment cap is ducted body, and the attachment cap is from the upper surface of the connecting plate Up raised, the connecting hole runs through the middle part of the attachment cap upper end, and the substrate is bonded with connecting plate, the calotte and institute Attachment cap fitting is stated, the attachment cap covers the elastic slice；The elastic slice includes: main body and lower wiring board, during the main body is Hollow body, the lower wiring board are located at the upper surface of the main body, and the upper wiring board, the connecting hole and the lower wiring board are just It is right.

Further, the keycap further include: reinforcing rib, the reinforcing rib are described all from the lower surface of calotte toward lower convexity Reinforcing rib extends to the edge of the calotte from the salient point.

Further, the keycap further include: salient point, the salient point from the lower surface of the calotte toward lower convexity, it is described on Wiring board is located at the lower surface of the salient point,

Further, rinforcement bar, the rinforcement bar are located at the edge of the attachment cap lower end and towards the attachment caps Internal protrusion, the rinforcement bar and the elastic slice, which are formed, to be interference fitted.

Further, the elastic slice includes: cross bar, and the cross bar is located at the lower end of the main body, the both ends point of the cross bar It is not connect with the edge of the main body.

Further, the cross bar is two, and two cross bars intersect and are mutually perpendicular to.

After adopting the above technical scheme, the effect of the utility model is: the film key with above structure, it not only can be with Anti-static function is played, reduces key by extraneous electrostatic damage bring functional deficiency, and manufacturing process is simple, at This is lower.

Detailed description of the invention

Fig. 1 be the utility model relates to film key schematic diagram；

Fig. 2 be the utility model relates to keycap schematic diagram；

Fig. 3 be the utility model relates to thin-film capacitor schematic diagram；

Fig. 4 be the utility model relates to elastic slice schematic diagram；

Fig. 5 be the utility model relates to film key sectional view.

Specific embodiment

Technical solutions of the utility model are further described below by embodiment:

The utility model provides a kind of film key of antistatic, as shown in Figure 1, film key includes: keycap 1, film Capacitor 2 and elastic slice 3, keycap 1 are bonded with thin-film capacitor 2, and thin-film capacitor 2 covers elastic slice 3.When in use, user presses film key Keycap 1 is pressed, keycap 1 is contacted with elastic slice 3 after deformation occurs, so that the circuit of circuit board be made to be connected.

In conjunction with shown in Fig. 2 and Fig. 5, keycap 1 is formed by silica gel material, keycap 1 include: substrate 11, calotte 12, salient point 13, Upper wiring board 14 and reinforcing rib 15, calotte 12 are convex ducted body, and the upper surface of calotte 12 from substrate 11 is up raised, salient point 13 and reinforcing rib 15 all from the lower surface of calotte 12 toward lower convexity, salient point 13 is located at the middle part of calotte, and reinforcing rib 15 is from salient point 13 The edge of calotte 12 is extended to, upper wiring board 14 also is located at the middle part of calotte, and upper wiring board 14 is located at the lower surface of salient point 13. Substrate 11 is bonded with thin-film capacitor 2, and calotte 12 covers elastic slice 3, and upper wiring board 14 with elastic slice 3 for contacting.When user presses key When cap 1, deformation occurs for calotte 12, and upper wiring board 14 is contacted with elastic slice 3, connection circuit.Wherein, rebound can be enhanced in salient point 13 Power enhances the feel of pressing, and since salient point 13 is located at the lower surface of calotte 12, not will cause abrasion.Reinforcing rib 15 The anti-pressure ability that calotte 12 can be enhanced further increases the feel of pressing.Specifically, in the present embodiment, reinforcing rib 15 is Four, four evenly distributed around salient point 13.

In conjunction with shown in Fig. 3 and Fig. 5, thin-film capacitor 2 is made of upper electrode layer 2a, poly- methacrylate layer 2b and lower electrode layer 2c, on Electrode layer 2a, poly- methacrylate layer 2b and lower electrode layer 2c are arranged successively.Thin-film capacitor 2 includes: connecting plate 21, attachment cap 22, connection Hole 23 and rinforcement bar 24, attachment cap 22 are ducted body, and the upper surface of attachment cap 22 from connecting plate 21 is up raised, and connecting hole 23 passes through Wear the middle part of 22 upper end of attachment cap, rinforcement bar 24 is located at the edge of 22 lower end of attachment cap and convex towards the inside of attachment cap 22 It rises.Substrate 11 is bonded with connecting plate 21, and calotte 12 is bonded with attachment cap 22, and connecting plate 21 is bonded with circuit board, upper electrode layer 2a It is connect respectively with the earthed circuit of circuit board with lower electrode layer 2c.Attachment cap 22 covers elastic slice 3, rinforcement bar 24 and the formation of elastic slice 3 Interference fit.Wherein, electronics can store by the thin-film capacitor 2 that upper electrode layer 2a, poly- ethyl ester 2b and lower electrode layer 2c are formed, when When generating electrostatic, the electronics on keycap 1 be can store in thin-film capacitor 2, and be exported electrostatic by earthed circuit.Rinforcement bar 24 one side can play buffer function to the deformation of elastic slice 3, avoid 3 deformation of elastic slice excessive and can not restore, on the other hand may be used To position to elastic slice 3, it is avoided to shift.

In conjunction with shown in Fig. 4 and Fig. 5, elastic slice 3 is formed by metal material, and elastic slice 3 includes: main body 31, lower wiring board 32 and cross Bar 33, main body 31 are ducted body, and lower wiring board 32 is located at the upper surface of main body 31, and cross bar 33 is located at the lower end of main body 31, cross bar 33 both ends are connect with the edge of main body 31 respectively.Upper wiring board 14, connecting hole 23 and lower 32 face of wiring board, when calotte 12 is sent out When raw deformation, upper wiring board 14 is contacted with lower wiring board 32, the functional loop of connection circuit, is provided signal for push action and is passed It is defeated.Since main body 31 is formed by conductive metallic material, itself there is elasticity, therefore screen resilience can be applied to calotte 12, into one Step improves pressing feel.Cross bar 33 can avoid pressing dynamics are excessive from leading to 31 deformation of main body with the global shape of retainer body 31 Can not excessively it restore.Specifically, cross bar 33 is two, and two cross bars 33 intersect and are mutually perpendicular to.

As it can be seen that the film key with above structure, can not only play anti-static function, key is reduced by the external world Electrostatic damage bring functional deficiency, and manufacturing process is simple, and cost is relatively low.

It is emphasized that term " first ", " second ", " third " in the present invention are used for description purposes only, and cannot It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the One ", " second ", " third " feature can explicitly or implicitly include at least one of the features.In description of the invention, The meaning of " plurality " is at least two, such as two, three etc., unless otherwise specifically defined.In the embodiment of the present invention The directional instruction (such as up, down, left, right, before and after ...) of institute is only used for explaining a certain particular pose (as shown in the picture) Under relative positional relationship, motion conditions etc. between each component, if the particular pose changes, directionality instruction Also it correspondingly changes correspondingly.In addition, term " includes " and " having " and their any deformations, it is intended that cover non-exclusive Include.Such as contain a series of steps or units process, method, system, product or equipment be not limited to it is listed Step or unit, but optionally further comprising the step of not listing or unit, or optionally further comprising for these processes, side The intrinsic other step or units of method, product or equipment.

Embodiment described above, only preferred embodiments of the invention, be not to limit practical range of the invention, therefore it is all according to The equivalent change or modification that structure, feature and principle described in scope of the present invention patent is done, should be included in the present invention In patent claim.

Claims

1. a kind of film key of antistatic, it is characterised in that: the film key includes: keycap, thin-film capacitor and elastic slice, institute Stating keycap includes: substrate, calotte and upper wiring board, and the calotte is ducted body, and the upper surface of the calotte from the substrate is past Upper protrusion, the upper wiring board are located at the middle part of the calotte；The thin-film capacitor is by upper electrode layer, poly- methacrylate layer and lower electrode Layer is arranged successively composition, and the thin-film capacitor includes: connecting plate, attachment cap and connecting hole, and the attachment cap is ducted body, described The upper surface of attachment cap from the connecting plate is up raised, and the connecting hole runs through the middle part of the attachment cap upper end, the base Plate is bonded with connecting plate, and the calotte is bonded with the attachment cap, and the attachment cap covers the elastic slice；The elastic slice includes: Main body and lower wiring board, the main body are ducted body, and the lower wiring board is located at the upper surface of the main body, the upper route Plate, the connecting hole and the lower wiring board face.

2. the film key of antistatic according to claim 1, it is characterised in that: the keycap further include: salient point, it is described For salient point from the lower surface of the calotte toward lower convexity, the upper wiring board is located at the lower surface of the salient point.

3. the film key of antistatic according to claim 2, it is characterised in that: the keycap further include: reinforcing rib, institute Reinforcing rib is stated all from the lower surface of calotte toward lower convexity, and the reinforcing rib extends to the edge of the calotte from the salient point.

4. the film key of antistatic according to claim 1, it is characterised in that: rinforcement bar, the rinforcement bar are located at institute State the edge of attachment cap lower end and towards the internal protrusion of the attachment cap, the rinforcement bar forms interference with the elastic slice and matches It closes.

5. the film key of antistatic according to claim 1, it is characterised in that: the elastic slice includes: cross bar, the cross Bar is located at the lower end of the main body, and the both ends of the cross bar are connect with the edge of the main body respectively.

6. the film key of antistatic according to claim 5, it is characterised in that: the cross bar is two, two cross bars Intersect and is mutually perpendicular to.