CN219611757U

CN219611757U - Integrated structure's tact switch

Info

Publication number: CN219611757U
Application number: CN202320622120.XU
Authority: CN
Inventors: 林志龙; 黄宇兴; 陈宗仁
Original assignee: Guangdong Quanlin Electronics Co ltd
Current assignee: Guangdong Quanlin Electronics Co ltd
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-08-29
Anticipated expiration: 2033-03-24

Abstract

The utility model discloses a tact switch with an integrated structure, which comprises a PCB (printed circuit board), an elastic pad and a second electrode, wherein a touch sensing area is arranged in the middle of the PCB, a grounding end arranged in a closed loop is arranged at the periphery of the touch sensing area, the grounding end is connected with the first electrode, an induction distance is arranged between the grounding end and the touch sensing area, an induction capacitor is arranged between the grounding end and the first electrode, the elastic pad is arranged on the upper wall of the PCB and is attached to the upper wall of the PCB, conductive particles arranged at intervals are distributed on the elastic pad, and the conductive particles are distributed in the touch sensing area correspondingly. When in actual use, the key or the touch spring is changed into the elastic pad, when the finger is in contact with the elastic pad, the preset pressure is applied and the elastic pad is deformed, so that the conduction of the first electrode and the second electrode can be realized, the touch sense is realized, the structure thickness is smaller, the application range is wider, and the structure has better commercial property and playability.

Description

Integrated structure's tact switch

Technical Field

The utility model relates to the field of touch switches, in particular to an integrated structure touch switch.

Background

Touch switches are an emerging product of technological development progress. The wall switch is designed by applying the principle of a touch sensing chip, is an updated product of the traditional mechanical key type wall switch, can realize more intelligentization and is more convenient to operate, and has the advantages which are incomparable with the traditional switch.

However, a single touch structure does not have feedback sense, so that a vibration device is generally arranged on the touch switch, thereby realizing feedback of the switch, and the feedback of touch is realized by using a lamp body.

There are, of course, also the switch being provided in an integrated structure, but there still exists a problem of a large volume, for example, chinese patent 202022419667.9, which adopts a cooperation of a housing and a circuit board to realize an integrated design of the touch switch, but also has a problem of a large volume.

Disclosure of Invention

The utility model mainly aims to provide a tact switch with an integrated structure, and aims to realize the feedback of keys by adopting the arrangement of an elastic layer, so that the tact switch has the pressing sense of the traditional keys and a structure that the touch keys are not exposed, and meanwhile, a control structure is integrated on a PCB (printed circuit board) to realize the miniaturization of the switch.

In order to achieve the above object, the present utility model provides an integrated structure of a tact switch, comprising:

the PCB is provided with a touch sensing area in the middle, a grounding end arranged in a closed loop is arranged on the periphery of the touch sensing area, the grounding end is connected with a first electrode, an induction distance is arranged between the grounding end and the touch sensing area, the induction distance is a first threshold value, an induction capacitor is arranged between the grounding end and the first electrode, and a second threshold value is arranged on the induction capacitor;

the elastic pad is arranged on the upper wall of the PCB and is attached to the PCB, conductive particles are distributed on the elastic pad at intervals, the distribution of the conductive particles corresponds to the touch sensing area, and when pressure is applied to the elastic pad, the elastic pad deforms and conducts sensing current;

and a second electrode, when pressure is applied to the elastic pad and reaches a preset value, the first threshold value and the second threshold value reach preset threshold values, and the first electrode and the second electrode are conducted.

According to the technical scheme, when the touch pad is actually used, the key or the touch spring is changed into the elastic pad, when a finger is in contact with the elastic pad, the preset pressure is applied and the elastic pad is deformed, so that the conduction of the first electrode and the second electrode can be realized, the touch sense is realized, the structure is small in thickness, the application range is wide, and the touch pad has good commercial property and playability; in practical design, because the human body carries micro-current, when the finger is in contact with the elastic pad, the conductive particles conduct current and enable the touch sensing area to trigger the sensing distance and the sensing capacitance, when the pressing force of the finger reaches a preset value, the first threshold value and the second threshold value are opened, namely the opening caused by no triggering and other object contact is avoided by adopting a double-system mode, the stability of the switch is effectively ensured, wherein the first threshold value can be realized by adjusting the sensing distance, namely the larger the distance is, the larger the pressing force is needed; the second threshold value is needed to be changed by the capacitance with different ratio, and the larger the capacitance is, the larger the pressing force is needed.

Drawings

FIG. 1 is a cross-sectional view of a product of the utility model;

FIG. 2 is a schematic diagram of the principles of the present utility model;

fig. 3 is a schematic diagram of a first threshold value.

In the figure, 1 is a PCB, 11 is a touch sensing area, 12 is a grounding end, 2 is an elastic pad, 3 is a shell, 41 is a first electrode, 42 is a second electrode, 5 is a sensing capacitor, 61 is a clamping part, 62 is a clamping groove, and 100 is a sensing distance.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiment of the present utility model, directional indications (such as up, down, left, right, front, rear, top, bottom, inner, outer, vertical, lateral, longitudinal, counterclockwise, clockwise, circumferential, radial, axial … …) are referred to, and the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first" or "second" etc. in the embodiments of the present utility model, the description of "first" or "second" etc. is only for descriptive purposes, and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

As shown in fig. 1 to 3, a tact switch of an integrated structure includes:

the PCB 1, the middle part of the PCB 1 is provided with a touch sensing area 11, the periphery of the touch sensing area 11 is provided with a grounding end 12 arranged in a closed loop, the grounding end 12 is connected with a first electrode 41, an induction distance 100 is arranged between the grounding end 12 and the touch sensing area 11, the induction distance 100 is a first threshold value, an induction capacitor 5 is arranged between the grounding end 12 and the first electrode 41, and the induction capacitor 5 is provided with a second threshold value;

the elastic pad 2 is arranged on the upper wall of the PCB 1 and is attached to the upper wall of the PCB, conductive particles are distributed on the elastic pad 2 at intervals, the distribution of the conductive particles corresponds to the touch sensing area 11, and when pressure is applied to the elastic pad 2, the elastic pad 2 deforms and conducts induced current;

and a second electrode 42 for making the first electrode 41 and the second electrode 42 conductive when the pressure is applied to the elastic pad 2 and reaches a predetermined value, and the first threshold and the second threshold reach a predetermined threshold.

The touch sense can be realized, but more force is not needed, and false triggering is avoided.

In actual use, by changing the key or the touch spring into the elastic pad 2, when the finger is in contact with the elastic pad 2, the predetermined pressure is applied and deformed, so that the conduction between the first electrode 41 and the second electrode 42 can be realized, the touch sense is realized, the structure has smaller thickness, wider application range and better commercial property and playability; in practical design, because the human body carries micro-current, when the finger contacts with the elastic pad 2, the conductive particles conduct current and enable the touch sensing area 11 to trigger the sensing distance 100 and the sensing capacitor 5, when the pressing force of the finger reaches a preset value, the first threshold and the second threshold are opened, namely, the opening caused by no triggering and other object contact is avoided by adopting a double-system mode, so that the stability of the switch is effectively ensured, wherein the first threshold can be realized by adjusting the sensing distance 100, namely, the larger the distance is, the larger the pressing force is needed; the second threshold value is needed to be changed by the capacitance with different ratio, and the larger the capacitance is, the larger the pressing force is needed.

In the embodiment of the utility model, the induction distance 100 is 1 mm-2 mm. When the distance is too large, the problem of touch insensitivity is likely to occur, and the reason is that the piezoelectric sensing distance of the finger is about 2mm, and when the distance is too small, the effect of the first threshold value is lost.

Specifically, the grounding end 12 is arranged in a ring shape and is arranged in a closed loop.

More specifically, the deformation ratio of the elastic pad 2 is 1 to 0.7 or 0.8, i.e., a suitable pressing feeling, and it is possible to realize both the pressing feeling and the elastic feedback feeling while pressing the elastic pad 2 in.

In the embodiment of the utility model, the PCB board 1 and the elastic pad 2 are wrapped in the housing 3.

Further, the housing 3 is provided with a clamping portion 61, the elastic pad 2 is provided with a clamping groove 62 matched with the clamping portion 61, and the clamping groove 62 and the clamping portion 61 are elastically abutted, so that the tightness between the elastic pad 2 and the housing 3 is realized.

Still further, the housing 3 includes an upper case and a lower case, which are fixed by snap-fit.

In the embodiment of the present utility model, the elastic pad 2 is integrally formed with the conductive particles.

Specifically, the conductive particles may also be springs integrally formed with the elastic pad 2, so as to realize an integrated design, wherein the thickness of the elastic pad 2 is 3 mm-5 mm.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather, the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. An integrated structured tact switch comprising:

2. The integrated-structure tact switch of claim 1, further characterized by: the induction distance is 1 mm-2 mm.

3. The integrated-structure tact switch of claim 1, further characterized by: the grounding end is arranged in a circular ring shape and is arranged in a closed loop.

4. The integrated-structure tact switch of claim 1, further characterized by: the deformation ratio of the elastic pad is 1 to 0.7 or 0.8.

5. The integrated-structure tact switch of claim 1, further characterized by: the PCB and the elastic pad are coated in the shell.

6. The integrated-structured tact switch of claim 5, further comprising: the shell is provided with a clamping part, the elastic pad is provided with a clamping groove matched with the clamping part, and the clamping groove is elastically abutted against the clamping part.

7. The integrated-structured tact switch of claim 6, further comprising: the shell comprises an upper shell and a lower shell, and the upper shell and the lower shell are fixed by adopting buckling combination.

8. The integrated-structure tact switch of claim 1, further characterized by: the elastic pad and the conductive particles are integrally formed.

9. The integrated-structure tact switch of claim 1, further characterized by: the conductive particles may also be springs integrally formed with the elastomeric pad.