CN209183430U - A kind of push type normally closed switch - Google Patents

Abstract

The utility model relates to a kind of push type normally closed switch, comprising: press cap, outer housing, inner housing, first terminal, Second terminal and elastic component.Outer housing offers the first accommodating cavity, and accepting hole is offered at the top of the outer housing, and inner housing offers the second accommodating cavity.First terminal part, which is inserted in first, to be flexibly connected in housing hole with inner housing, first terminal part is inserted in the first shell aperture and connect with outer housing, Second terminal part, which is inserted in second, to be flexibly connected in housing hole with inner housing, and Second terminal part is inserted in the connection of second housing Kong Zhongyu outer housing.Outer housing and inner housing are by elastic component elastic connection, and inner housing is provided with the first crushing block, and inner housing is provided with the second crushing block.When first terminal by the extruding of the first crushing block, Second terminal by the second crushing block extruding when, first terminal and Second terminal abut against.First terminal and Second terminal are fixed by plugging mode, are not necessarily to plastic processing, and push type normally closed switch production cost is low.

Description

A kind of push type normally closed switch

Technical field

The utility model relates to switching technique fields, more particularly to a kind of push type normally closed switch.

Background technique

Push switch is also known as button switch, is low-voltage electrical apparatus that is a kind of manual and can automatically reseting.In control circuit In, push switch, which is usually used in issuing, starts or stops instruction, to control the electrical member such as electromagnetic starter, contactor, relay Device middle line loop current is switched on or switched off.According to the division of functional structure, push switch can be divided into push type normally closed switch With push type normal open switch.

Traditional push type normally closed switch is to press from both sides young formula structure, the plastic pedestal in switch of static contact, so that stationary contact Piece is fixed on switch pedestal.In the initial state, movable contact spring by elastic component extruding and be in contact with static contact, circuit is Closed state.User is by pushing movable contact spring by connecting rod by cap, separating movable contact spring with static contact, open at this time by cap is pressed Closing is action state, and circuit is off state.

Traditional its elastic component of push type normally closed switch is chronically at pressured state, and elastic component is chronically at elastically-deformable Under state, restoring elastically-deformable ability can die down, so as to cause movable contact spring and static contact poor contact.Also, it is traditional The plastic molding effect difference of the static contact of push type normally closed switch will lead to static contact and movable contact spring poor contact, and to stationary contact Plastic at high cost of piece.

Utility model content

Based on this, it is necessary to provide a kind of push type normally closed switch.

A kind of push type normally closed switch includes: by cap, outer housing, inner housing, first terminal, Second terminal and elasticity Part.

The outer housing offers the first accommodating cavity, and accepting hole is offered at the top of the outer housing, and the inner housing is received It is dissolved in first accommodating cavity, it is described to be at least partly inserted in the accepting hole by cap, it is described to be contained in described by cap The part of one accommodating cavity is connect with the inner housing.

The inner housing offers the second accommodating cavity, and the inner housing is in second accommodating cavity close to the elastic component Part offers in first housing hole in housing hole and second, and the outer housing is in first accommodating cavity close to the elastic component Part offers the first shell aperture and second housing hole.The first terminal part is inserted in described first in housing hole and institute Inner housing flexible connection is stated, the first terminal part is inserted in first shell aperture and connect with the outer housing, described Second terminal part is inserted in described second and is flexibly connected in housing hole with the inner housing, and the Second terminal part is inserted in It is connect in the second housing hole with the outer housing.

By the elastic component elastic connection, the elastic component is set to the shell for the outer housing and the inner housing Body is on the inner bottom surface at first accommodating cavity.The inner housing is in second accommodating cavity towards in the first terminal It is provided with the first crushing block on side wall, the inner housing is in second accommodating cavity towards setting on the inner sidewall of the Second terminal It is equipped with the second crushing block.When the first terminal by the extruding of first crushing block, the Second terminal by described When the extruding of two crushing blocks, the first terminal and the Second terminal are abutted against close to described by the part of cap.

The first terminal and the Second terminal are toughness material, and the first terminal and the Second terminal are conduction Material.

The first terminal and the Second terminal are arc by the position of cap described in one of the embodiments, Structure, part of the first terminal far from second crushing block at the arcuate structure offset with first crushing block It connects, part of the Second terminal far from first crushing block at the arcuate structure offsets with second crushing block It connects.

Inner bottom surface of the outer housing at first accommodating cavity is provided with pedestal in one of the embodiments, institute It states pedestal and offers the first fixation hole, the second fixation hole and elastic component fixing groove, the first terminal part is inserted in described It is connect in first fixation hole with the pedestal, the Second terminal part is inserted in second fixation hole to be connected with the pedestal It connects, the elastic component part is inserted in the elastic component fixing groove and connect with the pedestal.

Limiting card is provided on inner sidewall of the outer housing at first accommodating cavity in one of the embodiments, Ring, the inner housing, which is plugged, to be flexibly connected with the limited location snap ring with the limited location snap ring.

Inner sidewall of the outer housing at first accommodating cavity is bonded the inner housing in one of the embodiments, Lateral wall.

It is described in one of the embodiments, mutually to agree with by cap and the accepting hole.

The outer bottom of the inner housing offers the first limiting slot in one of the embodiments, and the outer housing is in institute It states and offers the second limiting slot on the inner bottom surface at the first accommodating cavity, one end part of the elastic component is inserted in first limit It is connect in the slot of position with the inner housing, the other end part of the elastic component is inserted in second limiting slot and the shell Body connection.

The top surface by cap is in circular arc planar in one of the embodiments,.

The partial cross section of first crushing block and second crushing block is trapezoidal in one of the embodiments,.

Described in one of the embodiments, by cap includes water proof ring, the water proof ring be set to it is described by cap with it is described Junction between outer housing, described water proof ring one end with it is described connect by the lateral surface of cap, the other end and the outer housing Lateral surface connection.

Above-mentioned push type normally closed switch in use, sets the first terminal and the Second terminal close to described It is the original state of the push type normally closed switch when being in contact by the part of cap.When the push type normally closed switch is initial shape When state, user's pressing is described to press cap, described the inner housing to be driven to move toward the direction of the elastic component by cap, the elasticity Part by the inner housing and the outer housing extruding and generate elastic deformation.In the inner housing toward the side of the elastic component During movement, first crushing block is gradually distance from the first terminal close to the part by cap, and described second Crushing block is gradually distance from the Second terminal close to the part by cap, and the first terminal is by first crushing block Pressure gradually becomes smaller, and the Second terminal is gradually become smaller by the pressure of second crushing block.The first terminal and described In the state of not by external force, the first terminal and the Second terminal are not connect close to described by the part of cap Second terminal Touching.Since the first terminal and the Second terminal are toughness material, and the first terminal and the Second terminal be by It is abutted against when pressure condition.The mistake of not pressured state is gradually converted by pressured state in the first terminal and the Second terminal Cheng Zhong, the first terminal and the Second terminal will be drifted apart from close to described by the part of cap.Set the first terminal It is the action state of the push type normally closed switch when not contacted described in by the part of cap with the Second terminal.It is described to press When pressure type normally closed switch is in action state, when user no longer presses described by cap, the elastic component will restore elastic deformation, institute Inner housing described in resilient element urges is stated to move toward the direction by cap.First crushing block and second crushing block will again The secondary extruding first terminal and the Second terminal, the first terminal and the Second terminal are close to the part for pressing cap It will gradually draw close until the two is in contact.Finally, the first terminal and the Second terminal are close to the part phase for pressing cap Contact, the push type normally closed switch restore again to original state.In the initial state, the push type normally closed switch is to close It closes.Under action state, the push type normally closed switch is to disconnect.The push type normally closed switch in entire use process, The elastic component only generates elastic deformation under action state, and elastic component will not be chronically at pressured state, in the initial state, The elastic component is not pressurized, and the first terminal and Second terminal contact are good.Moreover, the first terminal and described Two-terminal is fixed by plugging mode, is not necessarily to plastic processing, and the push type normally closed switch production cost is low.

Detailed description of the invention

Fig. 1 is the cross-sectional view of push type normally closed switch in the initial state in one embodiment；

Fig. 2 is cross-sectional view of the push type normally closed switch under action state in one embodiment；

Fig. 3 is the partial sectional view of push type normally closed switch in one embodiment；

Fig. 4 is the cross-sectional view of push type normally closed switch in one embodiment；

Fig. 5 is another cross-sectional view of push type normally closed switch in one embodiment；

Fig. 6 is the another cross-sectional view of push type normally closed switch in one embodiment.

Specific embodiment

To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing to this The specific embodiment of utility model is described in detail.Many details are explained in the following description in order to abundant Understand the utility model.But the utility model can be implemented with being much different from other way described herein, this field Technical staff can do similar improvement without prejudice to the utility model connotation, therefore the utility model is not by following public affairs The limitation for the specific embodiment opened.

In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is based on the figure Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention, It is a, three etc., unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down " It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.

It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element On one element or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be with It is directly to another element or may be simultaneously present centering elements.Term as used herein " vertically ", " level ", "upper", "lower", "left", "right" and similar statement for illustrative purposes only, be not offered as being uniquely to implement Mode.

Be a kind of push type normally closed switch 10 in one embodiment also referring to Fig. 1 to Fig. 3, comprising: by cap 100, Outer housing 200, inner housing 300, first terminal 400, Second terminal 500 and elastic component 600.User presses cap 100 by described Push type normally closed switch 10 described in closing or opening.It is described to press when the first terminal 400 and the Second terminal 500 contact Pressure type normally closed switch 10 is closed state.When the first terminal 400 and the Second terminal 500 do not contact, the push type Normally closed switch 10 is off-state.The elastic component 600 can generate elastic deformation and can restore elastic deformation.

The outer housing 200 offers the first accommodating cavity 210, and the top of the outer housing 200 offers accepting hole 220, The inner housing 300 is contained in first accommodating cavity 210, described to be at least partly inserted in the accepting hole 220 by cap 100 In, the part for being contained in first accommodating cavity 210 by cap 100 is connect with the inner housing 300.It is pressed described in user's pressing It is described to be able to drive the inner housing 300 toward the movement of the direction of the elastic component 600 by cap 100 when cap 100, and then squeeze institute Elastic component 600 is stated, the elastic component 600 is made to generate elastic deformation.The inner housing 300 offers the second accommodating cavity 310, described Inner housing 300 offers housing hole 320 and in first close to the part of the elastic component 600 in second accommodating cavity 310 Housing hole 330 in two, the outer housing 200 offer first close to the part of the elastic component 600 in first accommodating cavity 210 Shell aperture 230 and second housing hole 240.400 part of first terminal be inserted in described first in housing hole 320 with it is described Inner housing 300 is flexibly connected, and 400 part of first terminal is inserted in first shell aperture 230 and the outer housing 200 Connection, 500 part of Second terminal is inserted in described second in housing hole 330 to be flexibly connected with the inner housing 300, described 500 part of Second terminal is inserted in the second housing hole 240 and connect with the outer housing 200.400 He of first terminal The Second terminal 500 is fixed be inserted in first shell aperture 230, in the second housing hole 240 with the outer housing 200 Connection.

By 600 elastic connection of elastic component, the elastic component 600 is set for the outer housing 200 and the inner housing 300 The outer housing 200 is placed on the inner bottom surface at first accommodating cavity 210.The elastic component 600 is by the inner housing 300 and the outer housing 200 extruding when generate elastic deformation, at this point, the elastic component 600 be pressured state.The elasticity For part 600 during restoring elastic deformation, the elastic component 600 will push the inner housing 300 toward the side by cap 100 To movement, the elastic component 600 is gradually converted into not pressured state from pressured state.The elastic component 600 turns from pressured state During becoming not pressured state, the push type normally closed switch 10 is changed into off-state by closed state.The inner casing Body 300 in second accommodating cavity 310 towards being provided with the first crushing block 350 on the inner sidewall of the first terminal 400, it is described Inner housing 300 is in second accommodating cavity 310 towards being provided with the second crushing block 360 on the inner sidewall of the Second terminal 500. When the first terminal 400 is squeezed by the extruding of first crushing block 350, the Second terminal 500 by described second When the extruding of block 360, the first terminal 400 and the Second terminal 500 are in contact close to described by the part of cap.Described One terminal 400 and the Second terminal 500 are toughness material, and the first terminal 400 and the Second terminal 500 can generate Elastic deformation and elastic deformation can be restored.The first terminal 400 and the Second terminal 500 are changed into from pressured state Not during pressured state, the push type normally closed switch 10 is changed into off-state by closed state.The first terminal 400 and the Second terminal 500 be conductive material.

Above-mentioned push type normally closed switch 10 in use, sets the first terminal 400 and the Second terminal 500 It is the original state of the push type normally closed switch 10 when being in contact described in by the part of cap 100.When the push type is normal When make and break pass 10 is original state, user's pressing is described by cap 100, described the inner housing 300 to be driven past described by cap 100 The direction of elastic component 600 moves, the elastic component 600 by the inner housing 300 and the outer housing 200 extruding and generate Elastic deformation.The inner housing 300 toward the elastic component 600 direction move during, first crushing block 350 by Gradually far from the first terminal 400 close to the part for pressing cap 100, second crushing block 360 is gradually distance from described second Terminal 500 is gradually become close to the part for pressing cap 100, the first terminal 400 by the pressure of first crushing block 350 Small, the Second terminal 500 is gradually become smaller by the pressure of second crushing block 360.The first terminal 400 and described For two-terminal 500 in the state of not by external force, the first terminal 400 and the Second terminal 500 press cap 100 described in Part do not contact.Since the first terminal 400 and the Second terminal 500 are toughness material, and the first terminal 400 With the Second terminal 500 be pressured state when abut against.In the first terminal 400 and the Second terminal 500 by being pressurized During state is gradually converted into not pressured state, the first terminal 400 and the Second terminal 500 press cap described in 100 part will be drifted apart from.The first terminal 400 and the Second terminal 500 are set close to the part by cap 100 It is the action state of the push type normally closed switch 10 when not contacting.When the push type normally closed switch 10 is in action state, By cap 100 described in no longer pressing as user, the elastic component 600 will restore elastic deformation, and the elastic component 600 pushes in described Shell 300 is moved toward the direction by cap 100.First crushing block 350 and second crushing block 360 will squeeze again The first terminal 400 and the Second terminal 500, the first terminal 400 and the Second terminal 500 press cap close to described 100 part will gradually be drawn close until the two is in contact.Finally, the first terminal 400 and the Second terminal 500 are close to institute It states and is in contact by the part of cap 100, the push type normally closed switch 10 restores again to original state.In the initial state, described Push type normally closed switch 100 is closure.Under action state, the push type normally closed switch 100 is to disconnect.The push type is normal Make and break closes 10 in entire use process, and the elastic component 600 only generates elastic deformation under action state, and elastic component 600 is not It can be chronically at pressured state, in the initial state, the elastic component 600 is not pressurized, the first terminal 400 and described second Terminal 500 contacts well.Moreover, the first terminal 400 and the Second terminal 500 are fixed by plugging mode, without packet Modeling processing, 10 production cost of push type normally closed switch are low.

In order to improve the durability of the first terminal 400 and the Second terminal 500, in one of the embodiments, Also referring to Fig. 1 and Fig. 2, the first terminal 400 and the Second terminal 500 are arc by the position of cap 100 described in Shape structure, part of the first terminal 400 far from second crushing block 360 at the arcuate structure are squeezed with described first Briquetting 350 abuts against, part of the Second terminal 500 far from first crushing block 350 at the arcuate structure and institute The second crushing block 360 is stated to abut against.User pressing is described press cap 100 during, the first terminal 400 is from by described First crushing block 350 is expressed to not by the extruding of first crushing block 350, and the Second terminal 500 is from by described Two crushing blocks 360 are expressed to not by the extruding of second crushing block 360.That is, the first terminal 400 and described Second terminal 500 is changed into not pressured state from pressured state.The first terminal 400 and the Second terminal 500 are being restored During elastic deformation, since the first terminal 400 and the Second terminal 500 are by the position of cap 100 described in The deformation process of arcuate structure, the first terminal 400 and the Second terminal 500 changes linearly, and entire deformation process is flat Suitable, moment will not occur significantly shape change in the first terminal 400 and the Second terminal 500.When user no longer presses When pressing cap 100 described in pressure, during the elastic component 600 pushes the inner housing 300 to restore to original state, described first Terminal 400 and the Second terminal 500 also change linearly during generating elastic deformation again, and deformation process is smooth. In this way, reducing the abrasion of the first terminal 400 and the Second terminal 500 in deformation process, described first is improved The durability of terminal 400 and the Second terminal 500.

In order to consolidate the first terminal 400, the Second terminal 500 and the elastic component 600, a reality wherein It applies in example, referring to Fig. 6, inner bottom surface of the outer housing 200 at first accommodating cavity 210 is provided with pedestal 260, it is described Pedestal 260 offers the first fixation hole (not shown), the second fixation hole (not shown) and elastic component fixing groove (not shown), institute It states 400 part of first terminal and is inserted in first fixation hole and connect with the pedestal 260,500 part of Second terminal It is inserted in second fixation hole and is connect with the pedestal 260,600 part of elastic component is inserted in the elastic component and fixes It is connect in slot with the pedestal 260.In the present embodiment, the pedestal 260 is connected in the outer housing by way of buckle 200 inner sidewall.First fixation hole has further fixed the position of the first terminal 400, second fixation hole into One step secures the position of the Second terminal 500, and the elastic component fixing groove secures the position of the elastic component 600.It keeps away Exempt from the first terminal 400, the Second terminal 500 and the elastic component 600 and the case where inclination even falls occurs.Such as This, first fixation hole, second fixation hole and the elastic component fixing groove secure the first terminal 400, institute The position for stating Second terminal 500 and the elastic component 600 avoids the broken of 10 connection structure of push type normally closed switch It is bad.

In order to improve the job stability of the push type normally closed switch 10, figure is please referred in one of the embodiments, 4, the outer housing 200 is provided with limited location snap ring 370, the inner housing 300 on the inner sidewall at first accommodating cavity 210 It plugs and is flexibly connected with the limited location snap ring 370 with the limited location snap ring 370.User is in the pressing process for pressing cap 100 In, the inner housing 300 is moved toward the direction of the elastic component 600, and the lateral wall of the inner housing 300 is bonded the limit always The internal ring wall of position snap ring 370.When user no longer press it is described by cap 100 when, the elastic component 600 pushes the inner housing 300 During restoring to original state, the lateral wall of the inner housing 300 is also the inner ring for being bonded the limited location snap ring 370 always Wall.The limited location snap ring 370 defines that the moving direction of the inner housing 300, the inner housing 300 can only be vertically moved, be kept away Exempt from the inner housing 300 and transverse shakiness occurs.The transverse shakiness of the inner housing 300 may result in the first terminal 400 and first crushing block 350, the Second terminal 500 and second crushing block 360 abutting degree can not weaken or Person's enhancing, in turn resulting in the first terminal 400 can not efficiently separate with the Second terminal 500 or effectively contact.In this way, The setting of the limited location snap ring 370 improves the job stability of the push type normally closed switch 10, enhances the push type Sensitivity normally closed switch 10 closure and disconnected.

In order to further increase the job stability of the push type normally closed switch 10, ask in one of the embodiments, Refering to Fig. 5, inner sidewall of the outer housing 200 at first accommodating cavity 210 is bonded the lateral wall of the inner housing 300. User pressing is described press cap 100 during, the inner housing 300 is moved toward the direction of the elastic component 600, the shell 210 inner sidewall at first accommodating cavity of body 200 is bonded the lateral wall of the inner housing 300 always.When user no longer presses When pressing cap 100 described in pressure, during the elastic component 600 pushes the inner housing 300 to restore to original state, the shell Inner sidewall of the body 200 at first accommodating cavity 210 is also the lateral wall for being bonded the inner housing 300 always.The shell The setting for the lateral wall that inner sidewall of the body 200 at first accommodating cavity 210 is bonded the inner housing 300 defines in described The moving direction of shell 300, the inner housing 300 can only vertically move, and avoid the inner housing 300 and transverse shakiness occur. The transverse shakiness of the inner housing 300 may result in the first terminal 400 and first crushing block 350, described second The abutting degree of terminal 500 and second crushing block 360 can not weaken or enhance, and in turn result in the first terminal 400 It can not efficiently separate with the Second terminal 500 or effectively contact.In this way, the outer housing 200 is in first accommodating cavity The setting that inner sidewall at 210 is bonded the lateral wall of the inner housing 300 further improves the push type normally closed switch 10 Job stability, further enhance the push type normally closed switch 10 closure and the sensitivity that disconnects.

In order to further improve the job stability of the push type normally closed switch 10, in one of the embodiments, Referring to Fig. 1, described agreed with by cap 100 and 220 phase of accepting hole.User pressing is described press cap 100 during, it is described Inner housing 300 toward the elastic component 600 direction move, the lateral wall by cap 100 be bonded always the outer housing 200 in Hole wall at the accepting hole 220.When user no longer press it is described by cap 100 when, the elastic component 600 pushes the inner housing 300 restore to during original state, and the lateral wall by cap 100 is also to be bonded the outer housing 200 always in described Hole wall at accepting hole 220.The setting agreed with by cap 100 with 220 phase of accepting hole defines the inner housing 300 Moving direction, the inner housing 300 can only vertically move, and avoid the inner housing 300 and transverse shakiness occur.The inner housing 300 transverse shakiness may result in the first terminal 400 and first crushing block 350, the Second terminal 500 and institute The abutting degree for stating the second crushing block 360 can not weaken or enhance, and in turn result in the first terminal 400 and the second end Son 500 can not be efficiently separated or effectively be contacted.In this way, the setting agreed with by cap 100 with 220 phase of accepting hole more into One step improves the job stability of the push type normally closed switch 10, further enhances the push type normally closed switch 10 Closure and the sensitivity disconnected.

In order to limit the scope of activities of the elastic component 600, in one of the embodiments, also referring to 1 to Fig. 3, The outer bottom of the inner housing 300 offers the first limiting slot 340, and the outer housing 200 is at first accommodating cavity 210 The second limiting slot 250 is offered on inner bottom surface, one end part of the elastic component 600 is inserted in first limiting slot 340 Connect with the inner housing 300, the other end part of the elastic component 600 be inserted in second limiting slot 350 with it is described Outer housing 200 connects.In the present embodiment, the elastic component 600 is compressed spring.In another embodiment, the elastic component 600 be elastic rubber.In other embodiments, the elastic component 600 is elastoplastic.Elasticity is occurring for the elastic component 600 Deformation and during restoring elastic deformation, the both ends of the elastic component 600 are inserted in first limiting slot 340 and the respectively In two limiting slots 250, first limiting slot 340 and the second limiting slot 350 secure the position of the elastic component, avoid institute State the case where elastic component 600 inclination occurs or even falls.In this way, first limiting slot 340 and the second limiting slot 250 limit The scope of activities for having determined the elastic component 600 avoids the destruction of 10 connection structure of push type normally closed switch.

In order to improve the security performance of the push type normally closed switch 10, in one of the embodiments, referring to Fig. 1, The top surface by cap 100 is in circular arc planar.User is during using push type normally closed switch 10, user's finger skin Skin can be in contact with the top surface by cap 100.When to avoid the top surface by cap 100 be angular, edges and corners are scratched The risk of finger skin.The top surface by cap protects finger skin in the setting of circular arc planar, make user's finger with it is described Finger skin will not be caused to damage by the contact process of cap 100.Further, the top surface by cap 100 is provided with protection Layer.In the present embodiment, the protective layer is rubber material.In another embodiment, the protective layer is silica gel material.With In the finger at family and the contact process by cap 100, the protective layer plays the role of buffer protection, the finger skin of user Skin is not easy to be damaged by described by cap 100.In this way, the setting of the protective layer further improves the push type normally closed switch 10 Security performance.

When aging occurs for the elastic component 600, and the elastic component 600 restores elastically-deformable ability and dies down, the bullet Property part 600 cannot effectively push the inner housing 300 so that the first terminal 400 and described first squeeze it is fast 350, The Second terminal 500 and described second is squeezed and fast 360 cannot effectively be abutted, and in turn results in the first terminal 400 and described 500 poor contact of Second terminal.In order to which the first terminal 400 and the Second terminal 500 restore bullet in the elastic component 600 Good contact can still be maintained when dying down in the ability of property deformation.In one of the embodiments, referring to Fig. 6, described first The partial cross section of crushing block 350 and second crushing block 360 is trapezoidal.First crushing block 350 and described second squeezes It is pressed when block 360 abuts at the upper bottom edge of its trapezoid cross section with the first terminal 400 and the Second terminal 500 to be described The closed state of pressure type normally closed switch 10.First crushing block 350 of the trapezoid cross section and second crushing block 360 are protected When having demonstrate,proved the generation of elastic component 600 inelastic deformation, the first terminal 400 and described first squeezes fast 350, described second Preferable abutting relation can still be maintained in terminal 500 and second extruding fast 360, so that 400 He of the first terminal The well contact of Second terminal 500.In this way, maintaining the job stability of the push type normally closed switch 10.

In order to improve the waterproof performance of the push type normally closed switch 10, meet user to the push type normally closed switch 10 Waterproof demand, in one of the embodiments, referring to Fig. 6, it is described by cap 100 include water proof ring 110, the water proof ring 110 are set to described by the junction between cap 100 and the outer housing 200, described 110 one end of water proof ring and described press cap 100 lateral surface connects, the other end is connect with the lateral surface of the outer housing 200.In the present embodiment, the water proof ring 110 For flexible water circle, material is rubber.In the use process of the push type normally closed switch 10, the water proof ring 110 hinders Environmental liquids have been kept off to be splashed into the gap by the junction between cap 100 and the outer housing 200.In this way, the waterproof Circle 110 realizes the water-proof function of the push type normally closed switch 10, meets user to the push type normally closed switch 10 Waterproof demand improves the waterproof performance of the push type normally closed switch 10.

In order to enhance the fire protecting performance of the push type normally closed switch 10, the inner housing in one of the embodiments, 300 be fire proofing material.In the present embodiment, the fire proofing material is ABS(Acrylonitrile Butadiene Styrene, Acrylonitrile-butadiene-styrene (ABS)) plastics.In another embodiment, the fire proofing material is polyhexamethylene adipamide.Work as institute After stating the access external circuit of push type normally closed switch 10, if electrical hazard occurs for external circuit, cause the electric current of circuit excessive.By There is attribute resistant to high temperature in the fire proofing material, so as to effectively avoid the generation of phenomenon on fire.In this way, enhance it is described by The fire protecting performance of pressure type normally closed switch 10.

The push type normally closed switch 10 is fixedly connected with external device in order to facilitate user, wherein one embodiment In, referring to Fig. 6, the outer bottom of the outer housing 200 is provided with fixed card buckle 270.The fixed card buckle 270, which passes through, to be plugged The push type normally closed switch 10 is fixedly connected by mode with external device.In this way, improving the push type normally closed switch 10 Installation convenience degree, facilitate user and be fixedly connected with the push type normally closed switch 10 with external device.

Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.

Claims (10)

1. a kind of push type normally closed switch characterized by comprising press cap, outer housing, inner housing, first terminal, Second terminal And elastic component；

The outer housing offers the first accommodating cavity, and accepting hole is offered at the top of the outer housing, and the inner housing is contained in It is described to be at least partly inserted in the accepting hole by cap in first accommodating cavity, it is described to be contained in first appearance by cap The part for setting chamber is connect with the inner housing；

The inner housing offers the second accommodating cavity, and the inner housing is in second accommodating cavity close to the part of the elastic component Housing hole in housing hole and second is offered in first, the outer housing is in first accommodating cavity close to the part of the elastic component Offer the first shell aperture and second housing hole；The first terminal part be inserted in described first in housing hole with it is described interior Shell is flexibly connected, and the first terminal part is inserted in first shell aperture and connect with the outer housing, and described second Terminal part is inserted in described second and is flexibly connected in housing hole with the inner housing, and the Second terminal part is inserted in described It is connect in second housing hole with the outer housing；

The outer housing and the inner housing by the elastic component elastic connection, the elastic component be set to the outer housing in On inner bottom surface at first accommodating cavity；The inner housing is in second accommodating cavity towards the inner sidewall of the first terminal On be provided with the first crushing block, the inner housing is in second accommodating cavity towards being provided on the inner sidewall of the Second terminal Second crushing block；When the first terminal is crowded by described second by the extruding of first crushing block, the Second terminal When the extruding of briquetting, the first terminal and the Second terminal are abutted against close to described by the part of cap；

The first terminal and the Second terminal are toughness material, and the first terminal and the Second terminal are conduction material Matter.

2. a kind of push type normally closed switch according to claim 1, which is characterized in that the first terminal and described second Terminal is arcuate structure close to the position by cap, and the first terminal squeezes at the arcuate structure far from described second The part of block is abutted against with first crushing block, and the Second terminal is at the arcuate structure far from first crushing block Part abutted against with second crushing block.

3. a kind of push type normally closed switch according to claim 1, which is characterized in that the outer housing holds in described first It sets the inner bottom surface at chamber and is provided with pedestal, the pedestal offers the first fixation hole, the second fixation hole and elastic component fixing groove, The first terminal part is inserted in first fixation hole and connect with the pedestal, and the Second terminal part is inserted in institute It states in the second fixation hole and is connect with the pedestal, the elastic component part is inserted in the elastic component fixing groove and the pedestal Connection.

4. a kind of push type normally closed switch according to claim 1, which is characterized in that the outer housing holds in described first It sets and is provided with limited location snap ring on the inner sidewall at chamber, the inner housing, which is plugged, lives with the limited location snap ring with the limited location snap ring Dynamic connection.

5. a kind of push type normally closed switch according to claim 1, which is characterized in that the outer housing holds in described first Set the lateral wall that the inner sidewall at chamber is bonded the inner housing.

6. a kind of push type normally closed switch according to claim 1, which is characterized in that described to press cap and the accepting hole phase Agree with.

7. a kind of push type normally closed switch according to claim 1, which is characterized in that the outer bottom of the inner housing opens up There is the first limiting slot, the outer housing offers the second limiting slot, the elasticity on the inner bottom surface at first accommodating cavity One end part of part is inserted in first limiting slot and connect with the inner housing, and the other end part of the elastic component plugs It is connect in second limiting slot with the outer housing.

8. a kind of push type normally closed switch according to claim 1, which is characterized in that the top surface by cap is in arc surface Shape.

9. a kind of push type normally closed switch according to claim 1, which is characterized in that first crushing block and described The partial cross section of two crushing blocks is trapezoidal.

10. a kind of push type normally closed switch according to claim 1, which is characterized in that described by cap includes water proof ring, institute State water proof ring be set to it is described by the junction between cap and the outer housing, described water proof ring one end and the outside by cap Face connection, the other end are connect with the lateral surface of the outer housing.