CN2713610Y - Pushing switch - Google Patents

Abstract

The utility model provides a pushing switch which comprises a shell, an elastic trip, a push body which is used for pressing the elastic trip and fixed terminals. The shell is provided with a containing chamber. The fixed terminals and the elastic trip are contained in the containing chamber. The elastic trip comprises a contact part which is contacted and connected with the push body and an outer frame which is connected with the contact part. The fixed terminals comprise the first fixed terminal which is electrically connected with the contact part of the elastic trip and the second fixed terminal which is contacted with the outer frame of the elastic trip. Each fixed terminal comprises a touch spot which is matched with the elastic trip and a conducting part which is extended out the shell. Wherein, the elastic trip is also provided with an inner frame. The contact part is arranged in the inner frame. The inner frame is connected with the outer frame by a connecting part. After the elastic trip is pressed, force transfer is transferred from the contact part to the inner frame, and then the force transfer is transferred to the outer frame by the connecting part by the arrangement so that the stress of the elastic trip is diminished. Fatigue resistance is improved and life time is correspondingly extended.

Description

Push switch

[technical field]

The utility model relates to a kind of push switch, refers to a kind of push switch with built-in shell fragment especially.

[background technology]

The prior art relevant with the utility model please refer to No. the 5th, 113,047, the United States Patent (USP) of on May 12nd, 1992 bulletin.This patent has disclosed a kind of push switch, comprising: housing, be assembled in lid on the housing, be contained in fixed terminal, shell fragment and pressing body in the housing successively.Described housing is provided with sidewall, diapire and is enclosed to form in order to accommodate the receiving space of described fixed terminal, shell fragment and pressing body by this sidewall and diapire.Described fixed terminal places on the described shell bottom wall, comprises at first fixed terminal of these diapire both sides and second fixed terminal between this first fixed terminal.And described shell fragment is located at the top of fixed terminal, comprises housing and place being the arch contact site that is bent upwards in the housing, and wherein said contact site is strip, and its two ends link to each other with housing.The both sides of described shell fragment housing are respectively equipped with lower concave part, be used for connecting with first fixed terminal, described shell fragment contact site then be bent upwards be positioned at second fixed terminal directly over.Again, described pressing body partly is contained in the housing receiving space and its basal surface contacts with shell fragment contact site arch top.During use, the user is by pushing pressing body, make its arch contact site that compresses described shell fragment, the stressed generation elastic deformation of this contact site and down motion and electrically connect mutually with described second fixed terminal, thus realize the electric connection between first, second fixed terminal and make circuit turn-on; When user cancellation to the exerting pressure of pressing body also together return initial position with it because the effect of described shell fragment contact site self elastic force makes it lean pressing body.Wherein, when described pressing body applies pressure to described shell fragment, move downward behind the strip central portion pressurized of this shell fragment, and, directly be passed to housing by this junction again the junction that power is transmitted these contact site two ends and housing from this strip contact site top.

Yet, this design defect is: the power transmission of described shell fragment only depends on the strip contact site directly to be passed to housing, and make capable in the shell fragment transmittance process bang path shorter, shell fragment is stressed too concentrated, long-term use causes this shell fragment to produce metal fatigue easily, thereby has shortened its useful life.

[utility model content]

The purpose of this utility model is to provide a kind of push switch that has than the long life.

The purpose of this utility model is achieved through the following technical solutions: the utility model push switch comprises housing, shell fragment, compress the pressing body and the fixed terminal of shell fragment, wherein said housing is provided with a host cavity, described fixed terminal and shell fragment are contained in this host cavity, described shell fragment comprises contact site that connects with pressing body and the housing that is connected with this contact site, and described fixed terminal comprises that first fixed terminal that electrically contacts mutually with the shell fragment contact site reaches and contacted second fixed terminal of shell fragment housing, and each fixed terminal includes the contact of matching with shell fragment and extends the conducting portion of housing, wherein said shell fragment also is provided with an inside casing, described contact site places this inside casing, and described inside casing links to each other with housing by a junction.

Compared to prior art, behind the shell fragment pressurized of the utility model push switch, the power transmission is passed to inside casing from contact site, be passed to housing by connecting portion again, the bang path of power is elongated, thereby makes the stress of shell fragment reduce, fatigue resistance is improved, corresponding prolongation of life-span.

[description of drawings]

Fig. 1 is the three-dimensional combination figure of the utility model push switch.

Fig. 2 is the decomposing schematic representation of the utility model push switch.

Fig. 3 is another angle decomposing schematic representation of the utility model push switch.

Fig. 4 is the shell fragment view of the utility model push switch.

[embodiment]

See also Fig. 1 to shown in Figure 4, the utility model push switch 100, comprise housing 1, be coated on lid 2 on the housing 1, be immobilizated in the housing 1 and extend housing 1 fixed terminal 3, place shell fragment 4 in the housing 1 and part to be contained in the housing 1 and protrude in the pressing body 5 of lid 2.

Described housing 1 body that roughly is square comprises front surface 11, rear surface 12 and connects forward and backward surperficial 11,12 side 13.Wherein the middle part of front surface 11 is concaved with a host cavity 14, and has protruded out a reference column 111 respectively on four angles of this front surface 11, and rear surface 12 and 13 junctions, side are provided with and are used to the square hole 121 that makes fixed terminal 4 extend housing 1.

Described lid 2 comprises a platen surface 22 and vertically extending two fixing surface 21 from platen surface 22 both sides respectively.Wherein, each fixing surface 21 also inwardly protrudes out respectively and is provided with a clamping part 211.And described platen surface 22 is roughly rectangular, and its center is provided with one can make pressing body 5 protrude out the circular hole 222 of lid 2, and is provided with the four-way hole 221 that can cooperate with four reference columns all around.

Described fixed terminal 3 comprises first, second fixed terminal 31,32, two first contacts 312 that this first fixed terminal 31 comprises first main part 311 that is strip, extended by these first main part, 311 inward at both ends sides and extend conducting portion 313 in order to electrically connect with peripheral hardware (not shown) by this first main part, 311 1 ends bending, and second fixed terminal 32 comprises second main part 321 that is strip, second contact 322 of being extended to the inside by these second main part, 321 middle parts and the conducting portion 323 that is extended by this second main part, 321 1 ends bending.Wherein two first contacts 312 are positioned at this housing 1 host cavity 14 two bottom sides, and second contact 322 then is positioned at the centre of these two first contacts 312.

Shell fragment 4 comprises a rectangle housing 44 and places contact site 41, inside casing 42, connecting portion 43 in the housing 44.The three upwards arches upward with identical radian and is on the same arc surface.Wherein said contact site 41 is the strip that is bent upwards and places among the inside casing 42, and its two end links to each other with inside casing 42.And, the roughly rectangular frame shape of described inside casing 42, and upwards arch upward with certain radian.This inside casing 42 comprises a pair of long limit and pair of short edges, and wherein a pair of long limit is bent upwards with the radian identical with contact site 41.Be equipped with contact site 41 among the inside casing, these contact site 41 two ends link to each other with the pair of short edges middle part of this inside casing 42, and roughly constitute " saying " word shape with inside casing 42.Again, described inside casing 42 links to each other with housing 44 by a junction 43, and this connecting portion 43 is that two ends extend to housing along the direction parallel with contact site across two laminated structures of 44 liang of opposite side of housing in the present embodiment.Described inside casing 42 is set up between this two connecting portion 43, and its two long limit links to each other with this two connecting portion 43 respectively.In addition, in addition two opposite side that described housing 44 is provided with 43 liang of opposite side of connecting portion also are respectively equipped with a recess 441, are beneficial to and place the first terminal 31 under it to connect.

Described pressing body 5 comprises a cylindrical press section 51 and places bottom 52 under the press section 51, and the basal surface of described bottom 52 is provided with the contacted abutting part 521 in arch top with the contact site 41 of shell fragment 4.

During assembling, earlier fixed terminal 3 and housing 1 are installed together.Wherein first, second contact 311,321 of first, second fixed terminal 31,32 places the bottom of housing 1 host cavity 15, and its first, second conducting portion 312,322 extends housing 1 by the square hole 121 of housing 1.Secondly, shell fragment 4 is installed in the housing 1.Described shell fragment 4 is contained in the host cavity 15 of housing 1, and place on fixed terminal 3 first, second contacts 311,321, wherein the recess 441 of shell fragment 4 housings 44 connects with first contact 311 of fixed terminal 3, and described shell fragment 4 contact sites 41 are sitting at the top of fixed terminal 3 second contacts 321.Then, pressing body 5 is placed in the housing 1, wherein these pressing body 5 abutting parts 521 are positioned at the top of shell fragment 4 contact sites 41, and the press section 51 of this pressing body 5 then is exposed to the outside of housing 1.At last, lid 2 is assembled on the housing 1.Wherein, the reference column 111 of lid 2 platen surface 22 through holes 221 cases 1, and circular hole 222 makes the press section 52 of pressing body 5 pass through and protrude out lid 2.Again, the clamping part 211 on the fixing surface 21 is snapped on the rear surface 12 of housing 1.

During use, the press section 51 of user by pushing pressing body 5 makes its bottom abutting part 521 of 52 compress contact site 41 tops of described shell fragment 4.These contact site 41 stressed generation elastic deformations and down motion and with the electrically contact mutually of second contact site 321 of described second fixed terminal 32, thereby realize the electric connection between first, second fixed terminal 31,32 and make circuit turn-on; When user cancellation to the exerting pressure of pressing body 5 also together return initial position with it because the effect of the contact site 41 of described shell fragment 4 self elastic force makes it lean pressing body 5.Wherein, the utility model in use, when pressing body 5 forces in the contact site 41 of shell fragment 4, described shell fragment 4 contact sites 41 tops are stressed and this Stress Transfer is passed on the inside casing 42 from contact site 41 two ends, described inside casing 42 further by connecting portion 43 with Stress Transfer to housing 44.Be provided with like this, make the bang path of power elongated, and make whole shell fragment 4 suffered stress disperse, stressed corresponding the reducing of each parts, and then the fatigue resistance of raising shell fragment 4, the useful life of prolongation push switch 100.

Compared with prior art, the utility model push switch 100 shell fragments 4 are by being arranged on contact site 41 in the inside casing 42, and this inside casing 42 is linked to each other with housing 44 by a junction 43, thereby make and power progressively can be passed to housing 44 behind contact site 41 pressurizeds, and then increased the bang path of power, low defective of metal fatigue, useful life takes place easily and can solve in the prior art push switch.

Really, the inside casing 42 of the utility model push switch 100 shell fragments 4 is not to be the rectangular configuration described in the present embodiment, and it also can be square, ellipse or the like, can decide according to practical situations fully.And the connecting portion 43 of this push switch 100 shell fragments 4 is for being located between inside casing 42 and the housing 44, and its interconnect function is so it also can be according to the actual conditions setting.Again, described lid 2 can be provided with equally as required, and be not by the utility model push switch 100 necessary.As mentioned above, these variations all should be within the scope that the utility model is protected.

Claims (6)

1. push switch, comprise housing, shell fragment, compress the pressing body and the fixed terminal of shell fragment, wherein said housing is provided with a host cavity, described fixed terminal and shell fragment are contained in this host cavity, described shell fragment comprises contact site that connects with pressing body and the housing that is connected with this contact site, and described fixed terminal comprises that first fixed terminal that electrically contacts mutually with the shell fragment contact site reaches and contacted second fixed terminal of shell fragment housing, and each fixed terminal includes the contact of matching with shell fragment and extends the conducting portion of housing, it is characterized in that: described shell fragment also is provided with an inside casing, described contact site places this inside casing, and described inside casing links to each other with housing by a junction.

2. push switch as claimed in claim 1 is characterized in that: the rectangular frame shape of described inside casing, and upwards arch upward with certain radian.

3. push switch as claimed in claim 2 is characterized in that: be equipped with contact site among the described inside casing, both roughly constitute " saying " word shape.

4. push switch as claimed in claim 1 is characterized in that: described connecting portion is two laminated structures across housing two opposite side.

5. push switch as claimed in claim 4 is characterized in that: the two ends of described connecting portion extend to housing along the direction parallel with contact site.

6. push switch as claimed in claim 1 is characterized in that: described contact site, inside casing and connecting portion all upwards arch upward with identical radian and are on the same arc surface.

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