CN201311862Y - Two-stage type touch switch - Google Patents

Abstract

The utility model relates to a two-stage type touch switch, which comprises a base, a terminal set, a metal torsion spring, a pressing component and a casing. The terminal set comprises a share terminal, a first terminal and a second terminal, a first torque arm of the metal torsion spring is in normally closed contact with the share terminal, and a second torque arm is arranged below the pressing component. Under the pressing action of the pressing component on the second torque arm of the metal torsion spring, the second torque arm conducts elastic deformation, and the connection point on the second torque arm moves in a certain range and is in contacts with the corresponding connection points of the first terminal and the second terminal sequentially to generate two-stage signals. The two-stage type touch switch replaces the single metal torsion spring for the combined design of springs and spherical movable connection points in the prior art, so that the connection point of the metal torsion spring can be in movable contact with the terminals and the metal torsion spring can elastically return to original position, thereby effectively reducing the number of fitters. The two-stage type touch switch has the advantages of low cost, natural and convenient installation, more smooth operation, and improved product quality.

Description

The two-period form touch-switch

Technical field

The utility model relates to the switching device field, refers in particular to a kind of two-period form touch-switch that produces the two-stage switching signal in the process continuously of pushing, and for example can be applicable to the shutter release button of focusing automatically such as camera, mobile phone.

Background technology

Two sections open relations are used for digital camera, mobile phone etc., to realize the shutter release button of the automatic focus function of camera; Wherein can consult Chinese patent application number 200710091655.4 switching devices of being announced, system is by the base station that disposes the common fixed contact and first and second individual fixed contact, slide unit, formation such as elastomeric element and spherical travelling contact, so be accompanied by moving of slide unit, promote spherical travelling contact by slide unit, spherical travelling contact is connected between the side end face of the common fixed contact and first individual fixed contact, the signal of the output first order, be accompanied by further moving of slide unit, spherical travelling contact climbs on the platen surface of the common fixed contact and first individual fixed contact, contact with second individual fixed contact, thereby the sense of touch that is accompanied by click sound is exported partial signal; So; slide unit must reset by set elastomeric element after passing; so the increase nature of this elastomeric element can cause increasing of accessory, numerous and diverse property of assembling, cost promotes; volume strengthens; be unfavorable for market competition, adopt spherical travelling contact to roll simultaneously and contact, usually can occur in its motion process having some setbacks; even phenomenon such as can occur getting stuck, make troubles to use.

The utility model content

The utility model is at the existing disappearance of above-mentioned prior art, main purpose be to provide a kind of simple in structure, cost is low, operate two-period form touch-switch smoothly.

For realizing above-mentioned purpose, the utility model is taked following technical scheme:

A kind of two-period form touch-switch, comprise pedestal, terminal group, metal torsion spring, pressing component and shell, described pedestal has unlimited ccontaining cavity, described terminal group is fixedly arranged on the pedestal, this terminal group comprises common terminal, the first terminal and second terminal, and each contact of this common terminal, the first terminal and second terminal is arranged in order the same side in ccontaining cavity; Described metal torsion spring is installed in the ccontaining cavity, and it is provided with first toggle and second toggle, and this first toggle and described common terminal are normally closed contact condition; Described pressing component is embedded at the pedestal sidepiece, stretch out outside the pedestal upper end, and lower end abutment imposes pressing force by this pressing component to second toggle on second toggle of torsion spring, make the stressed back of this second toggle that strain take place, cause the contact of second toggle to move within the specific limits; Under nature, each contact of the contact of this second toggle and the first terminal, second terminal is contactless state; Under the pressing component pressed status, the contact of this second toggle contacts with the contact of the first terminal, thereby exports first order signal after making the first terminal, common terminal conducting; Continue under the pressed status at pressing component, the contact of this second toggle is removed from the contact of the first terminal, contacts fully until the contact with second terminal, thereby exports second level signal after making second terminal, common terminal conducting.

Have one between described first toggle and second toggle and be connected cylinder, this connection cylinder offers hollow hole, and this hollow hole is embedded on the reference column in the ccontaining cavity.

Described first toggle and second toggle are positioned at reference column the same side, and both are the state that staggers; This second toggle system presses arm and by one and bends inwards and extend the elastic arm that forms and constitute by pressing the arm end, and the contact of this second terminal is located on this elastic arm.

Described pressing component comprises that a button portion and is located at the catch of button subordinate end, and this catch is suspended from second toggle top.

The utility model compared with prior art, its advantage is that the metal torsion spring had both played contact and moved the effect that contacts each terminal, can play the effect of elastic reset again, so adopt single metal torsion spring member to replace the Combination Design of a plurality of members of prior art medi-spring and spherical travelling contact, reduced number of fitting parts effectively on the one hand, cost is low, installation is convenient naturally, can make operation more smooth and easy on the other hand, improve the quality of products, help marketing.

Description of drawings

Fig. 1 is the utility model perspective exploded view;

Fig. 2 is the utility model pedestal and terminal group assembling schematic diagram;

Fig. 3 is that the utility model terminal board lists intention;

Fig. 4 is the upright schematic diagram of the three-dimensional group of the utility model;

Fig. 5 is the non-pressed state schematic diagram of the utility model;

Fig. 6 is the utility model pressed state schematic diagram;

Fig. 7 is the further pressed state schematic diagram of Fig. 6;

Fig. 8 is a further pressed state schematic diagram of Fig. 7.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

See also Fig. 1 to shown in Figure 4, present embodiment discloses a kind of two-period form touch-switch, comprises pedestal 10, terminal group 20, metal torsion spring 30, pressing component 40 and shell 50, wherein:

This pedestal 10 is to be made by insulating material, and this pedestal 10 has unlimited ccontaining cavity 11, is provided with reference column 111 in this ccontaining cavity 11.These pedestal 10 outsides are provided with attaching clamp 12.

This terminal group 20 is a metallic conductor, and it is located on the pedestal 10 in the injection moulding mode, and each contact system is arranged in this ccontaining cavity 11; This terminal group 20 comprises common terminal 21, the first terminal 22 and second terminal 23.Wherein this common terminal 21 is provided with welding foot 211 and contact 212, and this welding foot 211 is stretched in outside the pedestal 10, and this contact 212 is positioned at ccontaining cavity 11 inboards.This first terminal 22 is provided with welding foot 221 and contact 222 equally, and welding foot 221 is also stretched in outside the pedestal 10, and contact 222 also is positioned at ccontaining cavity 11 inboards.This second terminal 23 is provided with welding foot 231 and contact 232 equally, and welding foot 231 is also stretched in outside the pedestal 10, and contact 232 also is positioned at ccontaining cavity 11 inboards.The contact 213 of the contact 212 of described common terminal 21, the contact 222 of the first terminal 22 and second terminal is the same side that is arranged in order in ccontaining cavity 11.

This metal torsion spring 30, it is integrative-structure, be provided with first toggle 31 and second toggle 32, have one between this first toggle 31 and second toggle 32 and be connected cylinder 33, this connection cylinder 33 offers hollow hole 331, this hollow hole 331 is embedded on the reference column 111 in the ccontaining cavity 11, thereby metal torsion spring 30 is installed in the ccontaining cavity 11.This first toggle 31 is normally closed contact condition with the contact 211 of described common terminal 21, and promptly both are in contact condition always, make to be in the situation that electrically conducts between the two all the time.This second toggle 32 is (being under the non-stress state) under nature, is that the contact with each terminal is in off-state (contactless state).Described first toggle 31 and second toggle 32 are positioned at reference column 33 the same sides, and both are the state that staggers; This second toggle 32 is to press arm 321 and by one to bend inwards and extend the elastic arm 322 form and constitute by pressing arm 321 ends, has a contact 323 on this elastic arm 322.

Pressing component 40, be embedded at pedestal 10 sidepieces, comprise button portion 41 and be located at the catch 42 of button portion 41 lower ends, stretch out outside the pedestal 10 upper end of this button portion 41, lower end abutment is on second toggle 32 of torsion spring 30, and catch 42 is suspended at the top of second toggle 32, thus, make this pressing component 40 impose downward pressing force to second toggle 32, thereby force these second toggle, 32 stressed backs that strain takes place, cause the contact of second toggle 32 to move within the specific limits, be able to spacing to second toggle 32 all the time by catch 42 simultaneously, and 32 motions of bootable second toggle, guarantee the stationarity of moving.More specifically, second toggle 32 press the lower end that arm 321 is located at pressing component 40, press arm 321 parts and blocked by catch 42, when pressing component 40 pressed down, this presses arm 321 can elastic deformations, wherein the contact 323 on the elastic arm 322 can move down thereupon.

Shell 50 is a metal shell, plays shield effectiveness.Offer holding hole 511 on the sidewall 51 of this shell 50, the positioning tab 12 on this holding hole 511 and the pedestal 10 fastens, and makes shell 50 and pedestal 10 affixed, covers ccontaining cavity 11 tops by shell 50.

During assembling, terminal group 20 and pedestal 10 are packed on the pedestal 10 terminal group 20 earlier with integrated injection molding.Then with metal torsion spring 30 by on the reference column 111 of ccontaining cavity 11 that connects cylinder 30 and be held in pedestal, metal torsion spring 30 is packed in the ccontaining cavity 11 fully, make first toggle 31 and normally closed contact of shared terminal 21 formation of this metal torsion spring 30.Then pressing component 40 is flush-mounted in a side of pedestal 10, wherein the catch 42 of this pressing component 40 is suspended from second toggle 32 of metal torsion spring 30, it limits second toggle 32 does not break away from knob portion 41 in running lower end on the one hand, 32 even runnings of bootable on the other hand second toggle.At last shell 50 is assembled on the pedestal 10 and gets final product.

Again in conjunction with shown in Figure 5, it is non-pressed state, be under the nature, wherein this first toggle 31 is that contact 211 with shared terminal 21 is in contact condition, and the contact 323 on the elastic arm 322 of this second toggle 32 is contactless state with the contact 222 of the first terminal 22, the contact 232 of second terminal 23.

In conjunction with shown in Figure 6, be pressed state again, after wherein this pressing component 40 pressed down, first toggle 31 of described metal torsion spring 3 was motionless, formed with shared terminal 21 all the time to electrically conduct; This second toggle 32 press arm 321 strains, contact 323 on the elastic arm 322 is moved thereupon, until contacting with the contact 222 of the first terminal 22, thereby by this first terminal 22 of second toggle, 32 conductings, because the conductor that first toggle 31 and second toggle 32 are structure as a whole, institute electrically conducts this first terminal 22 and shared terminal 21 formation in playing by this metal torsion spring 3, thus exportable first order signal.

In conjunction with shown in Figure 7, being the further pressed state of Fig. 6 again, promptly continuing under the pressed status at pressing component 40 that wherein first toggle 31 is still motionless, is to form with shared terminal 21 to electrically conduct; This second toggle 32 press arm 321 further strains, contact 323 on the elastic arm 322 is moved between the contact 232 of the contact 222 of the first terminal 22 and second terminal 23 thereupon, make the first terminal 22, second terminal 23, common terminal 21 form the moment conductings.

Again in conjunction with shown in Figure 8, it is further pressed state of Fig. 7, promptly continue again under the pressed status at pressing component 40, wherein first toggle 31 of this metal torsion spring 3 still electrically conducts with shared terminal 21, the arm 321 that presses of this second toggle 32 continues downward strain, and the contact 323 on the elastic arm 322 is removed from the contact 222 of the first terminal 22 thereupon, until contacting fully, thereby make output second level signal after second terminal 23, common terminal 21 conductings with the contact 232 of second terminal 23.

Finally, after unclamping pressing component 40, be by second toggle 32 press arm 321 distortion back resiliences, until returning to original nature, the contact of elastic arm 322 is removed thereupon from the contact 232 of second terminal 23, the contact 222 of the first terminal 22.

Therefore, the design focal point of the utility model is to contact with shared terminal is normally closed by first toggle of metal torsion spring, the pressing component below be located in second toggle, by this, at pressing component second toggle of metal torsion spring is pushed under the effect, make the second toggle strain of metal torsion spring, then the contact on second toggle moves within the specific limits, and with corresponding the first terminal, each contact of second terminal contacts one by one, so that generation second signal, so the utility model system adopts single metal torsion spring member to replace the Combination Design of a plurality of members of prior art medi-spring and spherical travelling contact, make the metal torsion spring can either play contact and move the effect that contacts each terminal, can play the effect of elastic reset again, reduced number of fitting parts so effectively, cost is low, and it is convenient that nature is installed, operation simultaneously is more smooth and easy, can improve the quality of products.

The above, it only is the preferred embodiment of the utility model structure, be not that technical scope of the present utility model is imposed any restrictions, so every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any trickle modification, equivalent variations and modification that above embodiment did.

Claims (4)

1, a kind of two-period form touch-switch, it is characterized in that: comprise pedestal, terminal group, metal torsion spring, pressing component and shell, described pedestal has unlimited ccontaining cavity, described terminal group is fixedly arranged on the pedestal, this terminal group comprises common terminal, the first terminal and second terminal, and each contact of this common terminal, the first terminal and second terminal is arranged in order the same side in ccontaining cavity; Described metal torsion spring is installed in the ccontaining cavity, and it is provided with first toggle and second toggle, and this first toggle and described common terminal are normally closed contact condition; Described pressing component is embedded at the pedestal sidepiece, stretch out outside the pedestal upper end, and lower end abutment imposes pressing force by this pressing component to second toggle on second toggle of torsion spring, make the stressed back of this second toggle that strain take place, cause the contact of second toggle to move within the specific limits; Under nature, each contact of the contact of this second toggle and the first terminal, second terminal is contactless state; Under the pressing component pressed status, the contact of this second toggle contacts with the contact of the first terminal, thereby exports first order signal after making the first terminal, common terminal conducting; Continue under the pressed status at pressing component, the contact of this second toggle is removed from the contact of the first terminal, contacts fully until the contact with second terminal, thereby exports second level signal after making second terminal, common terminal conducting.

2, two-period form touch-switch according to claim 1 is characterized in that: have one between described first toggle and second toggle and be connected cylinder, this connection cylinder offers hollow hole, and this hollow hole is embedded on the reference column in the ccontaining cavity.

3, two-period form touch-switch according to claim 2 is characterized in that: described first toggle and second toggle are positioned at reference column the same side, and both are the state that staggers; This second toggle system presses arm and by one and bends inwards and extend the elastic arm that forms and constitute by pressing the arm end, and the contact of this second terminal is located on this elastic arm.

4, two-period form touch-switch according to claim 1 is characterized in that: described pressing component comprises that a button portion and is located at the catch of button subordinate end, and this catch is suspended from second toggle top.

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