CN212570791U - Spring piece type microswitch - Google Patents

Abstract

The utility model discloses a shell fragment formula micro-gap switch, include: the shell is basically rectangular, and a containing cavity is formed in the shell; the static elastic sheet comprises a static contact end, a first middle end and a first connecting end, wherein the static contact end, the first middle end and the first connecting end are sequentially connected; the ejecting block is slidably arranged at the upper end of the accommodating cavity so as to drive the movable contact end and the static contact end to be mutually abutted or separated; the movable contact end is provided with a long and narrow slit along the length direction thereof, and the movable contact end is divided into two sections. The utility model provides a shell fragment formula micro-gap switch can improve the contactability ability of movable contact end and stationary contact end to improved shell fragment formula micro-gap switch's operational reliability, in addition, through the thickness that suitably increases the shell fragment, is showing the life who has improved micro-gap switch.

Description

Spring piece type microswitch

Technical Field

The utility model relates to an electrical apparatus switch technical field, especially a shell fragment formula micro-gap switch.

Background

The microswitch is a switch which has a minute contact interval and a quick action mechanism, performs a switching action by a specified stroke and a specified force, is covered by a shell, and has a driving rod outside.

External mechanical force acts on the action reed through a transmission element (a press pin, a button, a lever, a roller and the like), and when the action reed is displaced to a critical point, instantaneous action is generated, so that a movable contact at the tail end of the action reed is quickly connected with or disconnected from a static contact. When the acting force on the transmission element is removed, the action reed generates reverse action force, the transmission element acts in a reverse direction, and when the stroke of the transmission element reaches the action critical point of the reed, the reverse action is instantly finished. The micro switch has the advantages of small contact distance, short action stroke, small pressing power and quick on-off. However, in the conventional micro switch, the spring sheet at the moving contact point is usually of a one-piece structure, and the structure has the problem of poor contactability when contacting with the fixed contact point; secondly, the spring plate of the existing microswitch is usually thin, so that the breakdown of the spring plate is easy to happen during use, and the service life of the microswitch is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a spring-type microswitch with improved contact ability of the spring and more stable contact performance.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a flip-chip microswitch comprising:

the device comprises a shell, a first fixing piece and a second fixing piece, wherein an accommodating cavity is formed inside the shell;

the static elastic sheet comprises a static contact end positioned in the accommodating cavity, a first middle end clamped at one end of the inner wall of the shell and a first connecting end extending to the outside of the shell and used for connecting an external circuit, wherein the static contact end, the first middle end and the first connecting end are sequentially connected;

the movable elastic sheet comprises a movable contact end positioned in the accommodating cavity, a second middle end clamped at the other end of the inner wall of the shell and a second connecting end extending to the outside of the shell and used for connecting an external circuit, wherein the movable contact end, the second middle end and the second connecting end are sequentially connected;

the ejecting block is slidably mounted at the upper end of the accommodating cavity, extends to the outside of the shell and can slide up and down along the shell after being pressed so as to drive the movable contact end and the static contact end to be mutually abutted or separated; the movable contact end is provided with a long and narrow slit along the length direction thereof, and the movable contact end is divided into two sections.

Preferably, the casing includes the fixed lid of first fixed lid and second, the four corners of the fixed lid of first is equipped with first arch, the four corners of the fixed lid of second be equipped with the first blind hole of first protruding matched with, first fixed lid with the fixed lid of second passes through first arch with first blind hole cooperation joint forms the casing.

Preferably, the first fixing cover is further provided with a second protrusion, the cross sectional area of the second protrusion is larger than that of the first protrusion, and the second fixing cover is provided with a second blind hole matched with the second protrusion.

Preferably, the upper surface of the movable contact end is abutted against the bottom of the top block; and the lower surface of the movable contact end is mutually abutted with the upper surface of the static contact end when the top block is in an initial state.

Preferably, the top block is of an inverted T-shaped structure.

Preferably, the thicknesses of the static elastic sheet and the dynamic elastic sheet are both 0.15-0.2 mm.

The utility model has the advantages that:

1) the movable contact end is divided into at least two pieces by arranging the long and narrow slit on the movable contact end, so that the movable contact end is not a whole piece structure any more, the contact performance of the movable contact end and the static contact end can be improved, and the working reliability of the microswitch is improved;

2) the shell is of a detachable structure, and the plurality of bulges and the grooves are matched with each other, so that the shell is convenient to detach and mount and the sealing performance of the shell can be guaranteed;

3) the thickness of the static elastic sheet and the thickness of the dynamic elastic sheet are properly increased, the static elastic sheet and the dynamic elastic sheet can be applied to a safety alarm system of a front row seat of an automobile, and compared with the existing microswitch, the service life of the elastic sheet can be obviously prolonged, so that the service life of the microswitch is prolonged; and the integral structure is simple, the volume is small, and the device is suitable for being installed in narrow space places.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 3 is a schematic structural view of a first fixing cover;

FIG. 4 is a schematic structural view of a second fixing cover;

FIG. 5 is a schematic structural view of a movable spring plate;

FIG. 6 is a schematic structural view of a static elastic sheet;

fig. 7 is a schematic structural diagram of the top block.

Description of reference numerals:

1. a housing; 11. a first fixed cover; 12. a second stationary cover; 13. a first protrusion; 14. a first blind hole; 15. a second protrusion; 16. a second blind hole; 2. a static spring plate; 21. a stationary contact end; 22. a first intermediate end; 23. a first connection end; 3. a movable spring plate; 31. a movable contact end; 32. a second intermediate end; 33. a second connection end; 34. an elongated slit; 4. a top block; 41. a limiting part; 5. a receiving cavity.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

Referring to fig. 1 to 7, a leaf spring type microswitch includes: the spring plate comprises a shell 1, a static spring plate 2, a dynamic spring plate 3 and a top block 4, wherein the shell 1 is basically rectangular, and a containing cavity 5 is formed in the shell; the static elastic sheet 2 comprises a static contact end 21 positioned in the accommodating cavity 5, a first middle end 22 clamped at one end of the inner wall of the shell 1 and a first connecting end 23 extending to the outside of the shell 1 and used for connecting an external circuit (not shown in the figure), which are connected in sequence; the movable spring plate 3 comprises a movable contact end 31 positioned in the accommodating cavity 5, a second middle end 32 clamped at the other end of the inner wall of the shell 1 and a second connecting end 33 extending to the outside of the shell and used for connecting an external circuit, which are sequentially connected; the top block 4 is slidably mounted at the upper end of the accommodating cavity 5 and extends upwards to the outside of the housing 1, and the top block 4 can slide up and down along the housing 1 after being pressed so as to drive the movable contact end 31 and the fixed contact end 21 to be mutually abutted or separated, so that an external circuit is connected or disconnected; at least one long and narrow slit 34 is arranged on the movable contact end 31 along the length direction; that is, the movable contact end 31 is divided into a plurality of pieces by the long and narrow slit 34, in this embodiment, only one long and narrow slit 34 is provided, and the movable contact end 31 is divided into a left piece and a right piece, so that the movable contact end is not a whole piece structure any more, the contact performance between the movable contact end and the stationary contact end can be improved, and the working reliability of the microswitch is improved.

It can be understood that a groove for clamping the first middle end 22 and the second middle end 32 is formed in the interior of the housing 1, and the size of the groove is adapted to the size of the first middle end 22 and the second middle end 32; in addition, a recess for the top piece 4 to pass through is also formed in the housing at the upper end of the receiving chamber 5, and the size of the recess also matches the size of the top piece 4.

In this embodiment, the stationary contact end 21, the first middle end 22 and the first connection end 23 of the stationary elastic sheet 2 are integrally formed, and are substantially U-shaped; the moving contact end 31, the second middle end 32 and the second connecting end 33 of the moving spring plate 3 are also of an integrally formed structure and are approximately S-shaped; the U-shaped elastic sheet and the S-shaped elastic sheet are conventional elastic sheets, are convenient and easy to obtain, and are convenient for batch production.

With reference to fig. 3 and 4, the housing 1 includes a first fixing cover 11 and a second fixing cover 12, four corners of the first fixing cover 11 are provided with first protrusions 13, four corners of the second fixing cover 12 are provided with first blind holes 14 matched with the first protrusions 13, and the first fixing cover 11 and the second fixing cover 12 are clamped and connected to form the housing 1 through the first protrusions and the first blind holes; the first fixed cover 11 is further provided with a second protrusion 15, the cross-sectional area of the second protrusion 15 is larger than that of the first protrusion 13, and the second fixed cover 12 is provided with a second blind hole 16 matched with the second protrusion 15. In the illustrated embodiment, the first projection 13 and the second projection 15 are both cylindrical projections, and the corresponding first blind hole 14 and second blind hole 16 are both circular blind holes; obviously, in some other embodiments, other shapes, such as a conical protrusion, etc., may be provided. Through a plurality of archs and blind hole mutually support and form the casing, convenient dismantlement and installation also can ensure the sealed inseparability ability of casing lock simultaneously.

In this embodiment, the top block 4 is an inverted T-shaped structure, that is, two ends of the bottom of the top block have limiting portions 41, so that the top block can be prevented from being separated from the housing 1 when the contact end 31 abuts upwards.

In this embodiment, the upper surface of the movable contact end 31 abuts against the bottom of the top block 4; the lower surface of the movable contact end 31 is abutted against the upper surface of the stationary contact end 21 when the top block 4 is in the initial state. That is, the spring-piece type microswitch provided in this embodiment is a normally closed microswitch, and in an initial state, the movable contact end 31 and the stationary contact end 21 are abutted against each other, and at this time, an external circuit is in a connected state; when the upper end of the top block 4 is forced downwards, the movable contact end 31 is driven to move downwards, so that the movable contact end 31 and the static contact end 21 are separated from each other, at the moment, an external circuit is in a disconnected state, and after the external force is removed, the top block 4 is restored to an initial state under the action of the elastic force of the movable elastic sheet 3.

The elastic sheet type microswitch provided by the embodiment can be applied to a safety alarm system of a front seat of an automobile, and meanwhile, the thickness of the static elastic sheet 2 and the thickness of the dynamic elastic sheet 3 are increased to 0.15-0.2 mm, so that compared with the thickness of the existing elastic sheet below 0.1mm, the service life of the elastic sheet can be obviously prolonged, and the service life of the microswitch is prolonged; in addition, the elastic sheet type microswitch provided by the embodiment is simple in overall structure, small in size and suitable for being installed in narrow space places.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims (6)

1. A leaf spring type microswitch, comprising:

the device comprises a shell (1), wherein an accommodating cavity (5) is formed inside the shell (1);

the static elastic sheet (2) comprises a static contact end (21) which is positioned in the accommodating cavity (5), a first middle end (22) which is clamped at one end of the inner wall of the shell and a first connecting end (23) which extends to the outside of the shell and is used for connecting an external circuit, wherein the static contact end (21) is sequentially connected;

the movable spring piece (3) comprises a movable contact end (31) which is positioned in the accommodating cavity (5), a second middle end (32) which is clamped at the other end of the inner wall of the shell and a second connecting end (33) which extends to the outside of the shell and is used for connecting an external circuit, wherein the movable contact end (31) is sequentially connected;

the ejecting block (4) is slidably mounted at the upper end of the accommodating cavity (5), extends to the outside of the shell, and can slide up and down along the shell (1) after being pressed so as to drive the movable contact end (31) and the static contact end (21) to be mutually abutted or separated; the movable contact end (31) is provided with at least one long and narrow slit (34) along the length direction.

2. The reed-type microswitch according to claim 1, wherein the housing (1) comprises a first fixing cover (11) and a second fixing cover (12), wherein four corners of the first fixing cover (11) are provided with first protrusions (13), four corners of the second fixing cover (12) are provided with first blind holes (14) matched with the first protrusions (13), and the first fixing cover (11) and the second fixing cover (12) are matched and clamped with the first protrusions and the first blind holes to form the housing (1).

3. The reed type microswitch according to claim 2, wherein a second protrusion (15) is further provided on the first fixing cover (11), the cross-sectional area of the second protrusion (15) is larger than that of the first protrusion (13), and a second blind hole (16) which is matched with the second protrusion (15) is provided on the second fixing cover (12).

4. The reed type microswitch according to claim 1, wherein the upper surface of the movable contact (31) abuts against the bottom of the top block (4); the lower surface of the movable contact end (31) is abutted against the upper surface of the static contact end (21) when the top block (4) is in an initial state.

5. The reed microswitch according to claim 1, wherein the top block (4) is in an inverted T-shaped configuration.

6. The shrapnel type microswitch of claim 1, wherein the thickness of the static shrapnel (2) and the thickness of the dynamic shrapnel (3) are both 0.15-0.2 mm.

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