CN209982464U

CN209982464U - Key with piezoelectric induction

Info

Publication number: CN209982464U
Application number: CN201921106548.9U
Authority: CN
Inventors: 庄建明; 王建波
Original assignee: Shenzhen Liyang Sheng Technology Co Ltd
Current assignee: Shenzhen Sunia Technology Co ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-01-21
Anticipated expiration: 2029-07-15

Abstract

The utility model discloses a take button of electric induction, include backup pad, piezoceramics, FPC, key cap from bottom to top, piezoceramics passes through the conducting resin and is connected with FPC, the key cap passes through solid sticky articulate on FPC, piezoceramics includes the potsherd on upper portion and the copper sheet of lower part, the backup pad is in the position that corresponds the potsherd and is done keeping away the sky and handle. The utility model discloses increase the vibration feedback on the basis of traditional formula button, utilize the characteristic that the electric energy of potsherd itself and mechanical energy alternate, need not increase other vibrating device, and can produce different vibration effects according to vibration pressure, vibration effect when a plurality of buttons are pressed in addition can distinguish alone.

Description

Key with piezoelectric induction

Technical Field

The utility model relates to a button technical field, in particular to take button of piezoelectricity response.

Background

The keys have wide application in the electronic field, can be used as input of computers, switches of power supplies and other applications, the types of the keys are from initial mechanical keys to capacitive keys, and are light, thin and multifunctional, but feedback after the keys are pressed is not well developed all the time, and particularly in the occasions that eyes cannot look at a keyboard all the time, feedback of the keys is required to be provided so as to know the functions of the keys.

SUMMERY OF THE UTILITY MODEL

To the problem that prior art exists, the utility model provides a take button of piezoelectricity response.

In order to achieve the above purpose, the specific scheme of the utility model is as follows:

the utility model provides a take button of piezoelectricity response, includes backup pad, piezoceramics, FPC, key cap from bottom to top, piezoceramics passes through the conducting resin and is connected with FPC, the key cap passes through solid adhesive bonding on FPC, piezoceramics includes the potsherd on upper portion and the copper sheet of lower part, the backup pad is equipped with in the position that corresponds the potsherd and keeps away the vacancy, keep away the vacancy and make potsherd, copper sheet produce the deformation difference.

Preferably, the ceramic sheet and the copper sheet are respectively connected to the FPC through conductive paste.

Preferably, a light guide plate is additionally arranged between the keycap and the FPC, and the brightening effect of the key is achieved.

Preferably, the copper sheet portion of the piezoelectric ceramic is provided with a support portion.

Preferably, the FPC includes an ADC, a driving circuit, and a controller.

Adopt the technical scheme of the utility model, following beneficial effect has:

increase vibration feedback on traditional formula button, utilize the characteristic that the electric energy of potsherd itself and mechanical energy alternate, need not increase other vibrating device, and can produce different vibration effects according to vibration pressure, vibration effect when a plurality of buttons are pressed can distinguish alone in addition.

Drawings

Fig. 1 is a cross-sectional view of a first embodiment of the present invention;

fig. 2 is a cross-sectional view of a second embodiment of the present invention;

fig. 3 is a cross-sectional view of a third embodiment of the present invention;

fig. 4 is a block diagram of the FPC functional module of the present invention.

The key comprises 1-keycap, 2-solid glue, 3-piezoelectric ceramic, 31-ceramic piece, 32-copper piece, 4-FPC, 5-support plate, 6-conductive glue, 7-light guide plate and 8-support part.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, the utility model provides a take button of piezoelectricity response, include backup pad 5, piezoceramics 3, FPC-4, key cap 1 from bottom to top, piezoceramics 3 passes through conducting resin 6 and is connected with FPC, key cap 1 bonds on FPC-4 through solid glue 2, piezoceramics 3 includes potsherd 31 on upper portion and copper sheet 32 of lower part, backup pad 5 is equipped with in the position that corresponds potsherd 31 and keeps away the vacancy, keep away the vacancy and make potsherd 31, copper sheet 32 produce the deformation. The ceramic sheet 31 and the copper sheet 32 are connected to the FPC through the conductive paste 6, respectively.

Referring to fig. 2, a light guide plate 7 is added between the keycap 1 and the FPC-4 to realize the brightening effect of the key.

Referring to fig. 3, the copper sheet 32 portion of the piezoelectric ceramic 3 is provided with a support portion 8.

Referring to fig. 4, the FPC-4 includes an ADC, a driving circuit, and a controller.

The utility model discloses a theory of operation does:

referring to fig. 1, when a finger presses down a key cap 1, due to the fact that a supporting plate 5 is fixed, the key cap 1 presses an FPC-4 and piezoelectric ceramics 3, the piezoelectric ceramics 3 deforms, and the position of the supporting plate 5, corresponding to a ceramic piece 31 of the piezoelectric ceramics 3, is kept away, so that the deformation degree of a copper sheet 32 in the piezoelectric ceramics 3 is larger than that of the ceramic piece 31, the vibration generated by the piezoelectric ceramics 3 can drive the copper sheet 32 to vibrate, the deformation of the copper sheet 32 is larger than that of the ceramic piece 31, the copper sheet 32 can be supported by the supporting force of the supporting plate 5, and therefore the copper sheet 32 and a key on the front side of the ceramic piece 31 can be pushed.

Referring to fig. 2, a light guide plate 7 can be added between the keycap 1 and the FPC to realize the brightening effect of the keys.

Referring to fig. 3, in order to improve the key stroke of the key, the shape of the copper sheet 32 in the piezoelectric ceramic 3 is modified, and the supporting part 8 is arranged on the copper sheet to increase the key stroke of the key, so that when the key is pressed, the key is allowed to be pressed for a larger space, and the pressing hand feeling is improved.

After the piezoelectric ceramic 3 deforms, two poles of the piezoelectric ceramic 3 can generate voltage, the FPC-4 can analyze the voltage, and according to the voltage, the pressing position and the pressing strength are judged and different waveforms are output through the controller, so that the piezoelectric ceramic 3 can generate different vibration effects.

The FPC-4 outputs different waveforms according to the voltage magnitude is the prior art, and the description is omitted in the application.

Referring to fig. 4, when a plurality of keys are pressed simultaneously, the controller emits a waveform different from that of a single key press through the driving circuit to distinguish vibration effects of the plurality of keys when pressed individually.

The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the protection scope of the present invention.

Claims

1. The utility model provides a take button of piezoelectricity response, its characterized in that includes backup pad, piezoceramics, FPC, key cap from bottom to top, piezoceramics passes through the conducting resin and is connected with FPC, the key cap passes through solid adhesive bonding on FPC, piezoceramics includes the potsherd on upper portion and the copper sheet of lower part, the backup pad is equipped with in the position that corresponds the potsherd and keeps away the vacancy, keep away the vacancy and make potsherd, copper sheet produce the deformation difference.

2. The piezoelectric induction button according to claim 1, wherein the ceramic sheet and the copper sheet are respectively connected to an FPC through conductive adhesive.

3. The piezoelectric induction key according to claim 2, wherein a light guide plate is added between the keycap and the FPC to realize the lightening effect of the key.

4. The piezoelectric induction push button according to claim 3, characterized in that the copper sheet part of the piezoelectric ceramic is provided with a support.

5. The piezoelectric induction button according to any one of claims 1 to 4, wherein the FPC comprises an ADC, a driving circuit and a controller.