CN102347755A

CN102347755A - Microswitch trigger device

Info

Publication number: CN102347755A
Application number: CN2011101798710A
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: 2012-02-08
Anticipated expiration: 2031-06-29
Also published as: CN102347755B

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

The sensitive switch trigger equipment

Technical field

The present invention relates to a kind of sensitive switch trigger equipment.

Background technology

The triggering mode of sensitive switch commonly used is realized through touch-switch; For example mousebutton, mobile phone key etc.; Touch-switch is a kind of electronic switch; Realize break-make through the stressed springing of the metal clips of its internal structure; The structural representation of this touch-switch has been shown among Fig. 1; In the diagram; Press shift knob 2 during use gently; Make after shift knob 2 actions inner shell fragment 3 actions to make shell fragment 3 contact, realize the connection of switch with hard contact 6; When unclamping hand, release-push 2; The elastic force of shell fragment 3 restores, and leaves contact 6, makes switch break off.

Use this sensitive switch triggering mode; Need can trigger switch greater than the external force of specific threshold; And triggering strength is associated with the coefficient of elasticity design of shell fragment; And; Need could make the shell fragment trigger switch that contacts with the contact greater than specific stroke; The trigger theory of switch is to realize through shell fragment and contact Mechanical Contact, and stroke generally can be less than 0.5mm, and frequent pressing also can make metal clips fatigue follow the string and wear out in the contact and cause trigger switch to lose efficacy.

Summary of the invention

To the problem that exists in the above-mentioned prior art, the object of the present invention is to provide a kind of sensitive switch trigger equipment, it can realize triggering under travel incognito journey, little external force.

For achieving the above object, the present invention adopts following technical scheme:

A kind of sensitive switch trigger equipment; Comprise: capacitance body; The capacitance sensor that is connected, detects the capacitance of capacitance body with capacitance body; And the treatment facility that is connected with capacitance sensor; Treatment facility produces the switch triggering signal according to the variable quantity of the capacitance of capacitance body, said 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; Through float electrode or the fixed electrode of pushing capacitance body; Make displacement generation minor variations between float electrode and the fixed electrode; Thereby make the capacitance of capacitance body change; Capacitance sensor detects the capacitance after the variation; Again by the variation generation switch triggering signal of treatment facility according to capacitance; Realize the triggering of sensitive switch; This implementation; Be that variation according to capacitance comes trigger switch, realized the triggering under travel incognito journey, the little external force.

Description of drawings

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

Fig. 2 is the structural representation of sensitive switch trigger equipment embodiment one of the present invention;

Fig. 3 is the structural representation of sensitive switch trigger equipment embodiment two of the present invention.

Embodiment

Below with one of them preferred embodiment the present invention program is set forth in detail.

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

Referring to shown in Figure 2; It is the structural representation of sensitive switch trigger equipment embodiment one of the present invention; It includes: capacitance body 1; Be connected, detect the capacitance sensor 2 of the capacitance of capacitance body 1 with capacitance body 1; And the treatment facility 3 that is 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 Figure 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 sensitive switch trigger equipment shown in Fig. 2; When realizing trigger switch; Through float electrode 11 or the fixed electrode 12 of pushing capacitance body 1; Make displacement generation minor variations between float electrode 11 and the fixed electrode 12; Thereby make the capacitance in the capacitance body 1 change; Capacitance sensor 2 detects the capacitance after the variation; And send detected capacitance to treatment facility 3; By the variable quantity generation switch triggering signal of treatment facility 3 according to capacitance; Realize the triggering of sensitive switch; This implementation is that the variation according to capacitance comes trigger switch, has realized the travel incognito journey; Triggering under little external force.

In order more easily capacitance body to be pushed, can also be provided with trigger button 4 by capacitance body, shown in the structural representation of the embodiment two of Fig. 3.As shown in Figure 3; Be 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, under with the situation of fixed electrode, also can be that trigger button 4 is arranged on the outside of fixed electrode 12 with respect to capacitance body 1 as top electrode.When specifically being provided with, trigger button 4 can set the part into capacitance body 1, also can be to be provided with 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 the different elasticity medium for use; In following concrete implementation, be to be that example describes with the elastomeric material, 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 the float electrode 11 and the size of fixed electrode 12 are 1cm*1cm, the value apart from d between float electrode 11 and the fixed electrode 12 is 0.5cm, i.e. 5mm, selected elastic fluid is an elastomeric material, its dielectric coefficient ε _RBe about 3, DIELECTRIC CONSTANT ₀Be 8.85*10 ^-12F/m.

Can calculate capacitance body so, in view of the above is the capacitance that is subjected under 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, promptly d is changed to 4.5mm from 5mm, thus the capacitance that can calculate after the 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; Compare by the threshold value of treatment facility then this variable quantity and setting; If 0.06pf reaches this threshold value; Then judge trigger action is arranged; Send closure signal (ON); If do not reach this threshold value, then judging does not have trigger action, does not send any signal or sends the OFF signal of disconnection.

Wherein, This threshold value can freely be set according to actual needs; For example; Under the situation of the very sensitive trigger condition of needs, this threshold value can be set at less numerical value, under the situation less demanding to sensitivity; Then this threshold value can be set at bigger numerical value; Perhaps adopt certain processing account form to confirm this threshold value, take all factors into consideration, perhaps also can adopt other consideration mode to set with some correlated condition that combines other.In addition, this treatment facility can be realized by variety of way, for example CPU, process chip, programmable logic device or the like.

In addition; Above-mentioned capacitance sensor can adopt components and parts such as chip to realize; As long as can realize detection, in order to improve sensitivity, be that the capacitance sensor of 0.001pf is used but the preferred detection scope is 0-12pf, accuracy of detection to the capacitance of capacitance body.

The sensitive switch trigger equipment of the invention described above can be applicable to little fields of touching such as tactile sensing device of robot.

Above-described embodiment of the present invention only is the detailed description to better embodiment of the present invention, does not constitute the qualification to protection range of the present invention.Any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection range of the present invention.

Claims

1. sensitive switch trigger equipment; It is characterized in that; Comprise: capacitance body; The capacitance sensor that is connected, detects the capacitance of capacitance body with capacitance body; And the treatment facility that is connected with capacitance sensor; Treatment facility produces the switch triggering signal according to the variable quantity of the capacitance of capacitance body, said capacitance body comprise float electrode, fixed electrode and be folded in float electrode and fixed electrode between elastic fluid.

2. sensitive switch trigger equipment 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. sensitive switch trigger equipment 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. sensitive switch trigger equipment according to claim 1 and 2 is characterized in that, the detection range of said capacitance sensor is 0-12pf, and accuracy of detection is 0.001pf.

5. sensitive switch trigger equipment according to claim 1 and 2 is characterized in that: said elastic fluid is an elastomeric material.