CN102347755B

CN102347755B - Microswitch trigger device

Info

Publication number: CN102347755B
Application number: CN 201110179871
Authority: CN
Inventors: 叶耀斌
Original assignee: Vtron Technologies Ltd
Current assignee: Vtron Group Co Ltd
Priority date: 2011-06-29
Filing date: 2011-06-29
Publication date: 2013-12-25
Anticipated expiration: 2031-06-29
Also published as: CN102347755A

Abstract

The invention discloses a microswitch trigger device, comprising a capacitor body, a capacitor sensor connected with the capacitor body and used for detecting the capacitance of the capacitor body, and processing equipment connected with the capacitor sensor, wherein the processing equipment is used for generating a switch triggering signal according to the variation of the capacitance of the capacitor body; and the capacitor body comprises a movable electrode, a fixed electrode and an elastic medium clamped between the movable electrode and the fixed electrode. According to the scheme provided by the invention, when a switch is triggered, the displacement between the movable electrode and the fixed electrode is subjected to tiny change by pressing the movable electrode or the fixed electrode of the capacitor body, so that the capacitance of the capacitor body changes, the capacitor sensor is used for detecting the changed capacitance, the processing equipment is used for generating the switch triggering signal according to the variation of the capacitance, and thus, a microswtich is triggered; and according to the realization manner in such a way, the switch is triggered according to the variation of the capacitance, so that the trigger is realized in a micro travel and micro external force manner.

Description

Microswitch trigger device

Technical field

The present invention relates to a kind of microswitch trigger device.

Background technology

The triggering mode of sensitive switch commonly used is realized by touch-switch, mousebutton for example, mobile phone key etc., touch-switch is a kind of electronic switch, realize break-make by the stressed springing of the metal clips of its internal structure, the structural representation of this touch-switch has been shown in Fig. 1, in diagram, press gently shift knob 2 during use, make inner shell fragment 3 actions after shift knob 2 actions, make shell fragment 3 contact with hard contact 6, realize the connection of switch, when unclamping hand, during release-push 2, the elastic force of shell fragment 3 restores, leave contact 6, make switch disconnect.

Apply this sensitive switch triggering mode, the external force that need to be greater than certain threshold level can trigger switch, and triggering strength is associated with the coefficient of elasticity design of shell fragment, and, need to be greater than specific stroke and just can make the shell fragment trigger switch that contacts with contact, the trigger theory of switch is to realize by shell fragment and contact Mechanical Contact, and stroke generally can not be less than 0.5mm, press frequently also can make metal clips fatigue follow the string and contact aging and cause trigger switch to lose efficacy.

Summary of the invention

For above-mentioned problems of the prior art, the object of the present invention is to provide a kind of microswitch trigger device, it can realize triggering under micro travel, micro-external force.

For achieving the above object, the present invention by the following technical solutions:

A kind of microswitch trigger device, comprise: capacitance body, with capacitance body, be connected, the capacitance sensor of the capacitance of Detection capacitance body, and the treatment facility be connected with capacitance sensor, treatment facility produces the switch triggering signal according to the variable quantity of the capacitance of capacitance body, described capacitance body comprise float electrode, fixed electrode and be folded in float electrode and fixed electrode between elastic fluid.

According to the invention described above scheme, when realizing trigger switch, by float electrode or the fixed electrode of pressing capacitance body, make the displacement generation minor variations between float electrode and fixed electrode, thereby make the capacitance of capacitance body change, capacitance sensor detects the capacitance after variation, produce the switch triggering signal by treatment facility according to the variation of capacitance again, realize the triggering of sensitive switch, this implementation, be that variation according to capacitance carrys out trigger switch, realized the triggering under micro travel, micro-external force.

The accompanying drawing explanation

Fig. 1 is the structural representation of touch-switch of the prior art;

Fig. 2 is the structural representation of microswitch trigger device embodiment mono-of the present invention;

Fig. 3 is the structural representation of microswitch trigger device embodiment bis-of the present invention.

Embodiment

Below with one of them preferred embodiment, the present invention program is described in detail.

The present invention program's basic thought, be to adopt the capacitance body structure, and the variation of the capacitance by capacitance body realizes the triggering of sensitive switch.

Shown in Figure 2, it is the structural representation of microswitch trigger device embodiment mono-of the present invention, it includes: capacitance body 1, with capacitance body 1, be connected, the capacitance sensor 2 of the capacitance of Detection capacitance body 1, and the treatment facility 3 be connected with capacitance sensor 2, treatment facility 3 produces the switch triggering signal according to the variable quantity of the capacitance of capacitance body 1, in shown in Fig. 2, this capacitance body 1 comprise float electrode 11, fixed electrode 12 and be folded in float electrode 11 and fixed electrode 12 between elastic fluid 13.

According to the microswitch trigger device shown in Fig. 2, when realizing trigger switch, by float electrode 11 or the fixed electrode 12 of pressing capacitance body 1, make the displacement generation minor variations between float electrode 11 and fixed electrode 12, thereby make the capacitance in capacitance body 1 change, capacitance sensor 2 detects the capacitance after variation, and send the capacitance detected to treatment facility 3, variable quantity generation switch triggering signal by treatment facility 3 according to capacitance, realize the triggering of sensitive switch, this implementation, that variation according to capacitance carrys out trigger switch, realized micro travel, triggering under micro-external force.

In order more easily capacitance body to be pressed, can also on capacitance body, be provided with trigger button 4, as shown in the structural representation of the embodiment bis-of Fig. 3.As shown in Figure 3, to be arranged on float electrode 11 with trigger button 4 to describe with respect to the outside of capacitance body 1, according to actual needs, in the situation that using fixed electrode as top electrode, can be also that trigger button 4 is arranged on to the outside of fixed electrode 12 with respect to capacitance body 1.When specifically arranging, trigger button 4 can set the part into capacitance body 1, can be also to arrange separately with respect to capacitance body 1.

In the present invention program, elastic fluid 13 can adopt any resilient non-conductive material to form, according to actual different needs, can select different elastic fluids, in following specific implementation, be to take elastomeric material to describe as example, predictably, to those skilled in the art, can consider and adopt other resilient non-conductive materials to realize the present invention program.

In a concrete implementation, suppose that float electrode 11 and the size of fixed electrode 12 are 1cm*1cm, the value apart from d between float electrode 11 and fixed electrode 12 is 0.5cm, i.e. 5mm, selected elastic fluid is elastomeric material, its dielectric coefficient ε _rbe about 3, DIELECTRIC CONSTANT ε ₀for 8.85*10 ^-12f/m.

Can calculate so, accordingly capacitance body is the capacitance be subject in any push action situation:

C＝ε ₀εR _A/d＝8.85*10 ^-12*3*(0.01*0.01)/0.005＝0.53pf

When the touch-control float electrode, suppose that float electrode produces the displacement of 0.5mm, d is changed to 4.5mm from 5mm, thus the capacitance that can calculate after displacement is:

C＝ε ₀εR _A/d＝8.85*10 ^-12*3*(0.01*0.01)/0.0045＝0.59pf

Thereby the variable quantity that can draw capacitance is 0.06pf, then by treatment facility, the threshold value of this variable quantity and setting is contrasted, if 0.06pf reaches this threshold value, be determined with trigger action, send closure signal (ON), if do not reach this threshold value, judge and there is no trigger action, do not send any signal or send the OFF signal of disconnection.

Wherein, this threshold value can be according to the actual needs free setting, for example, in the situation that the very sensitive trigger condition of needs can be set as less numerical value by this threshold value, in the less demanding situation to sensitivity, this threshold value can be set as to larger numerical value, perhaps adopt certain processing account form to determine this threshold value, considered with some correlated condition in conjunction with other, or also can adopt other consideration mode to be set.In addition, this treatment facility can be realized by variety of way, for example CPU, process chip, programmable logic device etc.

In addition, above-mentioned capacitance sensor can adopt the components and parts such as chip to realize, as long as can realize the detection to the capacitance of capacitance body, in order to improve sensitivity, but being the capacitance sensor that 0-12pf, accuracy of detection are 0.001pf, the preferred detection scope applied.

The microswitch trigger device of the invention described above, can be applicable to the micro-touch fields such as tactile sensing device of robot.

Above-described embodiment of the present invention, be only the detailed description to better embodiment of the present invention, do not form limiting the scope of the present invention.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection range of the present invention.

Claims

1. a microswitch trigger device, it is characterized in that, comprise: capacitance body, the capacitance sensor be connected with capacitance body, and the treatment facility be connected with capacitance sensor, described capacitance body comprises float electrode, fixed electrode and be folded in float electrode and fixed electrode between elastic fluid, described capacitance sensor detects while pressing float electrode or fixed electrode the capacitance of the capacitance body after the displacement made between float electrode and fixed electrode changes, treatment facility produces the switch triggering signal when the variable quantity of the capacitance of capacitance body reaches threshold value.

2. microswitch trigger device according to claim 1, is characterized in that, also comprises: be arranged on the trigger button of float electrode with respect to the capacitance body outside.

3. microswitch trigger device according to claim 1, is characterized in that, also comprises: be arranged on the trigger button of fixed electrode with respect to the capacitance body outside.

4. microswitch trigger device according to claim 1 and 2, is characterized in that, the detection range of described capacitance sensor is 0-12pf, and accuracy of detection is 0.001pf.

5. microswitch trigger device according to claim 1 and 2, it is characterized in that: described elastic fluid is elastomeric material.