CN217881225U

CN217881225U - Micro switch

Info

Publication number: CN217881225U
Application number: CN202222270090.9U
Authority: CN
Inventors: 倪益明
Original assignee: Wenzhou Maohui Electronic Technology Co ltd
Current assignee: Wenzhou Maohui Electronic Technology Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-11-22
Anticipated expiration: 2032-08-26

Abstract

The utility model provides a microswitch, which belongs to the technical field of automobile spare and accessory parts, and comprises a shell, a movable contact piece, a static contact piece and a switch, wherein the shell is internally provided with a holding cavity, the static contact piece and the conductive piece are at least partially embedded in the shell, the static contact piece and the conductive piece are both provided with a pin part and extend out of the holding cavity, and the periphery of the pin part extending out of the shell is closely matched with the shell; the utility model discloses with static contact and conducting strip embedded in the casing, as the inserts of casing during the casing of moulding plastics, make the firm stable fixing in the casing of static contact and conducting strip, the contact pin portion that static contact and conducting strip extended the casing moreover closely cooperates with the casing in the ring week that extends casing department, avoids rocking of contact pin portion, when welding micro-gap switch to the circuit board simultaneously, can avoid the scaling powder to flow into the inside switch that leads to of micro-gap switch and damage to guarantee that product quality is stable, promote the product percent of pass.

Description

Micro switch

Technical Field

The utility model relates to an automobile spare and accessory part technical field, concretely relates to micro-gap switch.

Background

The microswitch is a switch which has a minute contact interval and a snap action mechanism, performs a switching action with a prescribed stroke and a prescribed force, is covered with a case, and has a drive lever on the outside.

External mechanical force in the microswitch acts on the action reed through a transmission element (a press pin, a button, a lever, a roller and the like), instantaneous action is generated when the action reed moves to a critical point, a movable contact at the tail end of the action reed is quickly connected with or disconnected from a fixed contact, reverse action force is generated by the action reed after the acting force on the transmission element is removed, and reverse action is instantaneously completed after the reverse stroke of the transmission element reaches the action critical point of the reed, so that the contact interval of the microswitch is small, the action stroke is short, the pressing force is small, and the on-off is quick.

Micro-gap switch by the wide application in the automotive filed, as a micro-gap switch of automobile spare and accessory parts among the prior art as shown in fig. 5, the static contact in this micro-gap switch has a plurality of contact pins 6 to the outside extension of casing, and there is great clearance 61 between contact pin 6 extends the ring week of casing 1 department and casing 1, and the inventor discovers that this structure has the shortcoming as follows at the in-process that uses this micro-gap switch: a. the contact pin can shake in use due to a large gap, and the stability is poor; b. when the microswitch is welded on a circuit board, soldering flux needs to be adopted, and the soldering flux easily flows into the microswitch from the gap, so that the switch is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming and not enough that prior art exists, and provide a can avoid the contact pin to rock, connect stable micro-gap switch.

The utility model adopts the following technical scheme: a microswitch comprises a shell, a movable contact piece, a static contact piece, a switch and a conductive piece, wherein the shell is internally provided with a containing cavity, the static contact piece and the conductive piece are at least partially embedded in the shell, the static contact piece and the conductive piece are respectively provided with a pin part, the shell extends out of the containing cavity, and the periphery of the pin part extending out of the shell is tightly matched with the shell.

The static contact piece is electrically connected with a static contact towards the inner part of the accommodating cavity.

The conducting strip extends towards the inside of the containing cavity to form a limiting part for fixing the movable contact piece.

The casing is including base and upper cover and both pass through buckle structure and be connected, the static contact is including first static contact and second static contact, first static contact at least part embedded in the base, the second static contact at least part embedded in the upper cover.

The first static contact piece is electrically connected with a first static contact towards the inside of the accommodating cavity, the second static contact piece is electrically connected with a second static contact towards the inside of the accommodating cavity, one end of the movable contact piece is positioned between the first static contact and the second static contact and is electrically connected with a movable contact, and the other end of the movable contact piece is fixed on the limiting part.

The limiting part comprises a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are separated by a certain distance, a first groove is formed in the first limiting plate, and a second groove is formed in the second limiting plate.

The movable contact piece is an elastic spring piece, an opening is formed in the movable contact piece and is located on one side of the movable contact, an elastic arm extends towards the inside of the opening close to the inner wall of the opening of the movable contact, a first connecting portion which is limited with the first groove is arranged on the elastic arm, a second connecting portion which is limited with the second groove is arranged on the inner wall of the opening far away from the movable contact, and a pressing portion which is abutted to the switch is arranged between the first connecting portion and the second connecting portion.

The upper cover is provided with a channel for the switch to move, the switch is positioned in the channel and is abutted against the pressing part, the switch is pressed to act on the pressing part to enable the moving contact to be electrically connected with the first fixed contact, and the moving contact is electrically connected with the second fixed contact without pressing the switch.

The first connecting portion comprises a first lug matched with the first groove and second lugs arranged on two sides of the first lug, and the first limiting plate is limited between the two second lugs.

The limiting part comprises a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are in the same structure, the first static contact piece and the second static contact piece are both provided with two static contacts, and the first limiting plate and the second limiting plate are in the same structure.

The beneficial effects of the utility model are as follows: the utility model discloses with static contact and conducting strip embedded in the casing, as the inserts of casing during the casing of moulding plastics, make the firm stable fixing in the casing of static contact and conducting strip, the contact pin portion that static contact and conducting strip extended the casing moreover closely cooperates with the casing in the ring week that extends casing department, avoids rocking of contact pin portion, when welding micro-gap switch to the circuit board simultaneously, can avoid the scaling powder to flow into the inside switch that leads to of micro-gap switch and damage to guarantee that product quality is stable, promote the product percent of pass.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments or the prior art descriptions will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, it still belongs to the scope of the present invention to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is an exploded view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of the present invention;

fig. 4 is a schematic view of the movable contact spring of the present invention;

FIG. 5 is a schematic view of a prior art micro-switch;

in the figure, 1-shell, 101-limiting part, 102-upper cover, 103-channel, 2-moving contact, 201-moving contact, 22-elastic arm, 221-first connecting part, 2211-first bump, 2212-second bump, 222-second connecting part, 223-pressing part, 3-static contact, 301-first static contact, 302-second static contact, 303-first static contact, 304-second static contact, 31-pin part, 32-static contact, 4-switch, 5-conducting strip, 51-limiting part, 52-first limiting plate, 521-first groove, 53-second limiting plate, 531-second groove, 6-pin, 61-gap.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are only used for convenience of expression and should not be understood as limitations to the embodiments of the present invention, and the following embodiments do not describe any more.

The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings only. Accordingly, the directional and positional terms used are intended to illustrate and understand the present invention and are not intended to limit the scope of the invention.

As shown in fig. 1 to 5, for the present invention provides an embodiment:

a microswitch comprises a shell 1, a movable contact piece 2, a static contact piece 3, a switch 4 and a conducting piece 5, wherein the shell 1 is internally provided with a containing cavity, at least part of the static contact piece 3 and the conducting piece 5 is embedded in the shell 1, the static contact piece 3 and the conducting piece 5 are respectively provided with a pin part 31, the shell 1 extends out of the containing cavity, the pin part 31 extends out of the periphery of the shell 1 and is tightly matched with the shell 1, the static contact piece 3 and the conducting piece 5 are embedded in the shell 1, the static contact piece 3 and the conducting piece 5 are used as inserts of the shell 1 during injection molding of the shell 1, the static contact piece 3 and the conducting piece 5 are firmly and stably fixed in the shell 1, the pin part 31 extending out of the shell 1 is tightly matched with the shell 1 in the periphery, shaking of the pin part 31 is avoided, and meanwhile when the microswitch is welded on a circuit board, scaling powder flowing into the microswitch can be prevented from being damaged, so that the product quality is stable, and the product qualification rate is improved.

The static contact piece 3 is electrically connected with a static contact 32 towards the inner part of the accommodating cavity, and the static contact 32 can be made of copper, silver, tungsten, molybdenum and the like.

The conducting strip 5 extends towards the inside of the accommodating cavity to form a limiting part 51 for fixing the movable contact piece 2, the conducting strip 5 is provided with two pin parts 31 to form a passage between the pin parts 31, the limiting part 51 and the movable contact piece 2, in the embodiment, the limiting part 51 comprises a first limiting plate 52 and a second limiting plate 53, the first limiting plate 52 and the second limiting plate 53 are separated by a certain distance, the first limiting plate 52 and the second limiting plate 53 are formed by bending the stationary contact piece 3 upwards, a first groove 521 is arranged on the first limiting plate 52, a second groove 531 is arranged on the second limiting plate 53, and the groove widths of the first groove 521 and the second groove 531 are matched with the thickness of the stationary contact piece 3.

The casing 1 is including base 101 and upper cover 102 and both pass through buckle structure to be connected, and buckle structure is for setting up the joint interface at upper cover 102 and setting up the joint piece on base 101, and the cooperation of multiunit joint interface and joint piece is fixed base 101 and upper cover 102, static contact 3 is including first static contact 301 and second static contact 302, first static contact 301 at least part embedded in base 101, second static contact 302 at least part embedded in upper cover 102.

The first static contact 301 is electrically connected with a first static contact 303 towards the inside of the accommodating cavity, the second static contact 302 is electrically connected with a second static contact 304 towards the inside of the accommodating cavity, one end of the movable contact 2 is located between the first static contact 303 and the second static contact 304 and is electrically connected with a movable contact 201, the other end of the movable contact is fixed on the limiting portion 51, and the movable contact 201 can be electrically connected with the first static contact 303 and the second static contact 304 respectively.

The movable contact piece 2 is an elastic spring piece, an opening 21 is formed in the movable contact piece 2 and is located on one side of the movable contact 201, an elastic arm 22 extends towards the inside of the opening 21 close to the movable contact 201, the elastic arm 22 is provided with a first connecting portion 221 forming a limit with the first groove 521, the inner wall of the opening 21 far away from the movable contact 201 is provided with a second connecting portion 222 forming a limit with the second groove 531, a pressing portion 223 abutting against the switch 4 is arranged between the first connecting portion 221 and the second connecting portion 222, the second connecting portion 222 of the movable contact piece 2 is embedded into the second groove 531 to form a limit, and the first connecting portion 221 of the elastic arm 22 abuts against the first groove 521, so that the movable contact piece 201 is always kept in an electric connection state with the second fixed contact 304.

The upper cover 102 is provided with a channel 103 for the switch 4 to move, the switch 4 is located in the channel 103 and abuts against the pressing portion 223, the switch 4 is installed from the lower side of the channel 103 and cannot move out of the upper side of the channel 103, the pressing of the switch 4 acts on the pressing portion 223 to electrically connect the movable contact 201 with the first fixed contact 303, and the pressing of the switch 4 does not act on the elastic arm 22 to electrically connect the movable contact 201 with the second fixed contact 304.

The first connecting portion 221 includes a first projection 2211 adapted to the first groove 521 and second projections 2212 disposed on two sides of the first projection 2211, and the first limiting plate 52 is limited between the two second projections 2212, so as to avoid the movable contact 2 from being greatly offset or dislocated during use, which may cause switch failure.

Further, this micro-gap switch still can set up to the double switch, specifically is: the number of the movable contacts 2 and the number of the switches 4 are two, the limiting portion 51 further includes a third limiting plate and a fourth limiting plate having the same structure as the first limiting plate 52 and the second limiting plate 53, the third limiting plate and the fourth limiting plate are used for fixing another movable contact 2, and the first static contact 301 and the second static contact 302 are both provided with two static contacts which are respectively linked with the movable contacts 201 of the two movable contacts 2.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. The utility model provides a micro-gap switch, includes that inside has casing (1) in holding chamber, movable contact spring (2), static contact (3) and switch (4), its characterized in that still including conducting strip (5), static contact (3) and conducting strip (5) all at least part embedded in casing (1), static contact (3) and conducting strip (5) all are provided with contact pin portion (31) and to the holding chamber outside extends casing (1), contact pin portion (31) extend the periphery and casing (1) of casing (1) department closely cooperate.

2. The microswitch according to claim 1, wherein the static contact piece (3) is electrically connected with a static contact (32) towards the inside of the accommodating cavity.

3. A microswitch according to claim 1, wherein the conducting strip (5) extends towards the inside of the accommodating cavity with a limiting part (51) for fixing the movable contact (2).

4. A microswitch according to claim 3, wherein the housing (1) comprises a base (101) and an upper cover (102) which are connected by a snap-fit structure, the static contact (3) comprises a first static contact (301) and a second static contact (302), the first static contact (301) is at least partially embedded in the base (101), and the second static contact (302) is at least partially embedded in the upper cover (102).

5. The microswitch of claim 4, wherein the first static contact (301) is electrically connected with a first static contact (303) towards the inside of the accommodating cavity, the second static contact (302) is electrically connected with a second static contact (304) towards the inside of the accommodating cavity, one end of the movable contact (2) is located between the first static contact (303) and the second static contact (304) and is electrically connected with a movable contact (201), and the other end of the movable contact is fixed on the limiting part (51).

6. The microswitch of claim 5, wherein the limiting portion (51) comprises a first limiting plate (52) and a second limiting plate (53), the first limiting plate (52) and the second limiting plate (53) are separated by a certain distance, a first groove (521) is formed in the first limiting plate (52), and a second groove (531) is formed in the second limiting plate (53).

7. A microswitch according to claim 6, wherein the movable contact (2) is an elastic spring, an opening (21) is provided on the movable contact (201) and is located at one side of the movable contact, an elastic arm (22) extends into the opening (21) near the inner wall of the opening (21) of the movable contact (201), a first connecting portion (221) forming a limit with the first groove (521) is provided on the elastic arm (22), a second connecting portion (222) forming a limit with the second groove (531) is provided on the inner wall of the opening (21) far away from the movable contact (201), and a pressing portion (223) abutting against the switch (4) is provided between the first connecting portion (221) and the second connecting portion (222).

8. The microswitch according to claim 7, wherein the upper cover (102) is provided with a channel (103) for moving the switch (4), the switch (4) is located in the channel (103) and abuts against the pressing portion (223), pressing the switch (4) acts on the pressing portion (223) to electrically connect the movable contact (201) with the first stationary contact (303), and the movable contact (201) is electrically connected with the second stationary contact (304) without pressing the switch (4).

9. The microswitch of claim 7, wherein the first connecting portion (221) comprises a first projection (2211) matched with the first groove (521) and second projections (2212) arranged at two sides of the first projection (2211), and the first limit plate (52) is limited between the two second projections (2212).

10. The microswitch according to claim 9, wherein the number of the movable contact pieces (2) and the number of the switches (4) are two, the limiting portion (51) further comprises a third limiting plate and a fourth limiting plate which have the same structures as the first limiting plate (52) and the second limiting plate (53), and the first static contact piece (301) and the second static contact piece (302) are both provided with two static contacts.