A micro switch with long service life

Abstract

The invention discloses a micro switch with a long service life, comprising a base and a cover, wherein the cover is covered on the base to form a receiving cavity, wherein a guide core is arranged in the receiving cavity, and further comprising a tension spring arranged in the receiving cavity, a movable sheet and a double-leg movable sheet respectively arranged in the receiving cavity, and a left pin and a right pin located at the left outer side and the right outer side of the double-leg movable sheet, wherein the double-leg movable sheet comprises a movable sheet pin, a left movable sheet and a right movable sheet, wherein the upper side of the end of the left movable sheet is bent inwardly to form an upper yielding portion, a left contact is arranged on the outer side of the left movable sheet, the lower side of the end of the right movable sheet is bent inwardly to form a lower yielding portion, and a right contact is arranged on the outer side of the right movable sheet; the rear end of the movable sheet is bent downwardly to form a movable sheet yielding portion, a left push portion is arranged on the left side of the front end of the movable sheet, and a right push portion is arranged on the right side of the front end of the movable sheet. By controlling the opening and closing of the double-leg movable sheet, the contacts on the double-leg movable sheet and the pins are in side contact and separation, so as to realize the on-off and off-off functions, reduce wear, and improve service life.

Description

Technical Field

[0001] The invention relates to a micro switch, in particular to a micro switch with a long service life. Background Art

[0002] A micro switch is a commonly used switch mechanism. It is a contact mechanism with a small contact interval and a quick-action mechanism. It performs a switching action with a specified stroke and a specified force. It is widely used in industry, electronics, machinery, metallurgy, electricity and other fields.

[0003] The working principle of the existing micro switch is: the external mechanical force acts on the action reed through the transmission element (pin, button, lever, roller, etc.), and when the action reed moves to the critical point, an instantaneous action is generated, so that the moving contact at the end of the action reed and the static contact are quickly connected or disconnected.

[0004] The existing micro switch usually adopts the method of setting the moving contact on the action spring. Before and after the action spring is pressed, the moving contact contacts the static contact above or below the action spring to achieve the function of conduction or disconnection. With this longitudinal frontal contact method, since the micro switch is often subjected to a large pressing force, the corresponding action spring has a large elastic recovery force. Therefore, the moving contact applies an excessive frontal force to the static contact. Both are subjected to frontal force, and the force is too large. The contact surface of the two is prone to wear and tear, and the service life is significantly reduced. Generally, the service life is only 10 million times. Summary of the invention

[0005] In view of the above-mentioned deficiencies, the object of the present invention is to provide a long-life micro switch, which realizes the on and off functions of the micro switch by controlling the opening and closing of the double-foot movable plates to achieve lateral contact and separation between the contacts and the pins on the double-foot movable plates. The contacts and the pins only rub against each other, and the force direction between the two becomes lateral force, which reduces the possibility of mutual wear and greatly improves the lifespan, and the lifespan is increased to 80 million times.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0007] A long-life micro switch comprises a base and a cover with an upper opening, the cover is covered on the base to form a receiving cavity, a guide core is arranged in the receiving cavity, and the upper end of the guide core moves up and down in the upper opening of the cover, characterized in that it also comprises a tension spring arranged in the receiving cavity and located directly below the guide core, a movable sheet and a double-leg movable sheet respectively arranged in the receiving cavity and mounted on the base, a left pin inserted on the base and located on the left outer side of the double-leg movable sheet, and a right pin inserted on the base and located on the right outer side of the double-leg movable sheet, wherein the double-leg movable sheet comprises a movable sheet pin inserted in the base, and a left movable sheet and a right movable sheet arranged on the movable sheet pin and arranged opposite to each other, the upper side edge of the end of the left movable sheet is bent inward to form an upper yielding portion, and the left movable sheet is movable inwardly and the upper side edge of the left movable sheet is bent inwardly ... and the upper side edge of the left movable sheet is bent inwardly and the upper side edge of the left movable sheet is bent inwardly and the upper side edge of the left movable sheet is bent inwardly and the upper side edge of the left movable sheet is bent inwardly and the upper side edge of the left movable sheet is bent inwardly and the upper side edge of the left movable sheet is bent inwardly and the upper side edge of the left movable sheet is bent inwardly and the upper A left contact is provided on the outer side and located on the side of the left pin, the lower side of the end of the right movable piece is bent inward to form a lower yielding portion, and a right contact is provided on the outer side of the right movable piece and located on the side of the right pin; the rear end of the movable piece is bent downward to form a movable piece yielding portion for the tension spring to be embedded, and one end of the tension spring is connected to the movable piece, and the other end is connected to the base. At the same time, a left pushing portion is provided on the left side edge of the front end of the movable piece and located on the outer side of the left movable piece end, and a right pushing portion is provided on the right side edge of the front end of the movable piece and located on the outer side of the right movable piece end; the opening and closing of the double-foot movable pieces are controlled by the movable piece, so that the double-foot movable pieces are respectively in side contact and separation with the left pin or the right pin, thereby realizing the on and off functions of the micro switch.

[0008] As a further improvement of the present invention, an embedding groove is provided on the upper end surface of the base and below the yielding portion of the movable sheet, and a hook block is provided at the rear end of the base, and a rear hook hole is provided on the hook block; a front hook hole is provided at the front end of the movable sheet; the front end of the tension spring is hooked on the front hook hole, and the rear end is hooked on the rear hook hole.

[0009] As a further improvement of the present invention, a limit block is provided at the front end of the base, and the limit block includes a vertical insertion block fixedly inserted into the base, a horizontal limit block provided at the upper end of the vertical insertion block and bent inwardly, a horizontal insertion block provided at the lower end of the vertical insertion block and bent inwardly, and a lower limit protrusion provided at the end of the horizontal insertion block and bent upwardly, wherein the horizontal limit block is located directly above the front end of the movable piece, and the lower limit protrusion is located directly below the front end of the movable piece.

[0010] As a further improvement of the present invention, a limiting groove for inserting the rear end of the movable piece is provided at the rear end of the base, and the hook block is inserted into the rear end surface of the limiting groove.

[0011] As a further improvement of the present invention, the movable piece includes a front horizontal movable part, a rear horizontal movable part parallel to the front horizontal movable part, and an inclined movable part connected between the rear end of the front horizontal movable part and the front end of the rear horizontal movable part, wherein the movable piece yielding part is formed by matching the inclined movable part with the rear horizontal movable part.

[0012] As a further improvement of the present invention, the movable sheet also includes a connecting portion connected to the lower front end of the front horizontal movable portion, the left pushing portion is connected to the left end of the connecting portion, the right pushing portion is connected to the right end of the connecting portion, and the left pushing portion and the right pushing portion are both pushing protrusions.

[0013] As a further improvement of the present invention, the rear end portions of the left movable plate and the right movable plate are respectively connected to the upper end of the movable plate pin through a connecting block, and the connecting block is composed of a vertical connecting portion and a parallel connecting portion, and is in a 7 shape as a whole; the rear end portions of the left movable plate and the right movable plate are respectively bent inwardly to form an upper bending portion connected to the side of the vertical connecting portion of the connecting block, and the end portion of the parallel connecting portion of the connecting block is bent outwardly to form a lower bending portion connected to the upper end portion of the movable plate pin; the connecting block as a whole is tilted inwardly from one side of the upper bending portion and is connected to the movable plate pin.

[0014] As a further improvement of the present invention, an upper strip-shaped opening is opened downwardly on the upper side of the left movable plate end, so that an upper give-way block is formed on the upper side of the left movable plate end, and the upper give-way portion is formed by bending the upper give-way block inward; a lower strip-shaped opening is opened upwardly on the lower side of the right movable plate end, so that a lower give-way block is formed on the lower side of the right movable plate end, and the lower give-way portion is formed by bending the lower give-way block inward.

[0015] As a further improvement of the present invention, the guide core includes an upper pressing portion, and a lower pressing portion arranged at the lower end of the upper pressing portion and located directly above the tension spring, wherein the upper pressing portion and the lower pressing portion are both semi-cylindrical, and the width of the lower pressing portion is greater than the width of the upper pressing portion.

[0016] As a further improvement of the present invention, the two outer sides of the base each have a side slot, and a locking protrusion is provided on the side slot; the two outer sides of the lower end of the cover each have an insertion portion downwardly provided for inserting into the side slot, and a slot is provided on the insertion portion for the locking protrusion to be locked in.

[0017] The beneficial effects of the present invention are:

[0018] (1) By adding a double-foot movable plate and a movable plate with a special structural design, and separately arranging the conduction pins on both sides of the double-foot movable plate, and controlling the opening and closing of the double-foot movable plate through the movable plate, the contact point and the pin on the double-foot movable plate are in lateral contact and separation, thereby realizing the conduction and disconnection function of the micro switch, the contact point and the pin only rub against each other, and the force direction between the two becomes lateral force, which reduces the possibility of mutual wear and greatly improves the service life, and the service life is increased to 80 million times;

[0019] (2) By optimizing and improving the structure of the movable piece, a movable piece yielding portion formed by bending downward is adopted to provide yielding space for the activity of the tension spring. When the size of the micro switch is certain, side space is provided for the installation of the double-foot movable piece, and the structural design is more reasonable and compact;

[0020] (3) The tension spring structure is adopted to increase the arm length of the movable plate, and the adjustable space of the tension spring is larger, so as to achieve a variety of different feel and sound.

[0021] The above is an overview of the technical solution of the invention. The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 An exploded view of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall external structure of the present invention;

[0024] Figure 3 It is a partial structural schematic diagram of the present invention;

[0025] Figure 4 is a cross-sectional view of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the left pushing part and the right pushing part pushing the double-leg moving piece of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the double-foot moving piece of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the movable sheet of the present invention;

[0029] Figure 8 It is a schematic structural diagram of the limit block of the present invention. DETAILED DESCRIPTION

[0030] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0031] Please refer to Figures 1 to 8 An embodiment of the present invention provides a long-life micro switch, including a base 1 and a cover 2 with an upper opening 21, wherein the cover 2 is covered on the base 1 to form a receiving cavity, wherein a guide core 3 is arranged in the receiving cavity, and the upper end of the guide core 3 moves up and down in the upper opening 21 of the cover 2. At the same time, the high-life micro switch provided by the embodiment of the present invention also includes a tension spring 4 arranged in the accommodating cavity and located directly below the guide core 3, a movable sheet 5 and a double-leg movable sheet 6 respectively arranged in the accommodating cavity and mounted on the base 1, a left pin 7 inserted on the base 1 and located on the left outer side of the double-leg movable sheet 6, and a right pin 8 inserted on the base 1 and located on the right outer side of the double-leg movable sheet 6, wherein the double-leg movable sheet 6 includes a movable sheet pin 61 inserted in the base 1, and a left movable sheet 62 and a right movable sheet 63 arranged on the movable sheet pin 61 and opposite to each other, the upper side edge of the end of the left movable sheet 62 is bent inward to form an upper giving way portion 621, a left contact 622 is arranged on the outer side of the left movable sheet 62 and located on the side of the left pin 7, and the lower side of the end of the right movable sheet 63 The side is bent inward to form a yielding portion 631, and a right contact 632 is provided on the outer side of the right movable piece 63 and on the side of the right pin 8; the rear end of the movable piece 5 is bent downward to form a movable piece yielding portion 51 for the tension spring 4 to be embedded, and one end of the tension spring 4 is connected to the movable piece 5, and the other end is connected to the base 1. At the same time, a left pushing portion 52 is provided on the left side edge of the front end of the movable piece 5 and on the outer side of the end of the left movable piece 62, and a right pushing portion 53 is provided on the right side edge of the front end of the movable piece 5 and on the outer side of the end of the right movable piece 63; the opening and closing of the double-foot movable piece 6 is controlled by the movable piece 5, so that the double-foot movable piece 6 is respectively in side contact and separation with the left pin 7 or the right pin 8, thereby realizing the on and off functions of the micro switch.

[0032] like Figure 3 and Figure 4 As shown, an embedding groove 11 is provided on the upper end surface of the base 1 and below the movable sheet yielding portion 51, and a hook block 12 is provided at the rear end of the base 1, and a rear hook hole 121 is provided on the hook block 12; a front hook hole 54 is provided at the front end of the movable sheet 5; the front end of the tension spring 4 is hooked on the front hook hole 54, and the rear end is hooked on the rear hook hole 121. At the same time, a limiting groove 13 is provided at the rear end of the base 1 for the rear end of the movable sheet 5 to be inserted, and the hook block 12 is inserted into the rear end surface of the limiting groove 13.

[0033] like Figure 3 , Figure 4 and Figure 8As shown, a limit block 9 is provided at the front end of the base 1, and the limit block 9 includes a vertical insertion block 91 fixedly inserted into the base 1, a horizontal limit block 92 provided at the upper end of the vertical insertion block 91 and bent inwardly, a horizontal insertion block 93 provided at the lower end of the vertical insertion block 91 and bent inwardly, and a lower limit protrusion 94 provided at the end of the horizontal insertion block 93 and bent upwardly, wherein the horizontal limit block 92 is located directly above the front end of the movable sheet 5, and the lower limit protrusion 94 is located directly below the front end of the movable sheet 5.

[0034] The movable piece 5 includes a front horizontal movable portion 55, a rear horizontal movable portion 56 parallel to the front horizontal movable portion 55, and an inclined movable portion 57 connected between the rear end of the front horizontal movable portion 55 and the front end of the rear horizontal movable portion 56, wherein the movable piece yielding portion 51 is formed by matching the inclined movable portion 57 with the rear horizontal movable portion 56.

[0035] like Figure 7 As shown, the movable sheet 5 also includes a connecting portion 58 connected to the lower front end of the front horizontal movable portion 55, the left pushing portion 52 is connected to the left end of the connecting portion 58, the right pushing portion 53 is connected to the right end of the connecting portion 58, and the left pushing portion 52 and the right pushing portion 53 are both pushing protrusions.

[0036] like Figure 6 As shown, the rear ends of the left movable piece 62 and the right movable piece 63 are respectively connected to the upper end of the movable piece pin 61 through a connecting block 64, and the connecting block 64 is composed of a vertical connecting part 641 and a parallel connecting part 642, and the whole is in a 7 shape; the rear ends of the left movable piece 62 and the right movable piece 63 are respectively bent inward to form an upper bending part (623, 633) connected to the side of the vertical connecting part 641 of the connecting block 64, and the end of the parallel connecting part 642 of the connecting block 64 is bent outward to form a lower bending part 6421 connected to the upper end of the movable piece pin 61; the connecting block 64 as a whole is tilted inward from one side of the upper bending part (623, 633) and is connected to the movable piece pin 61.

[0037] At the same time, an upper strip-shaped opening 624 is downwardly opened on the upper side of the end of the left movable piece 62, so that an upper give-way block 625 is formed on the upper side of the end of the left movable piece 62, and the upper give-way portion 621 is formed by bending the upper give-way block 625 inwardly; a lower strip-shaped opening 634 is upwardly opened on the lower side of the end of the right movable piece 63, so that a lower give-way block 635 is formed on the lower side of the end of the right movable piece 63, and the lower give-way portion 631 is formed by bending the lower give-way block 635 inwardly.

[0038] like Figure 1As shown, the guide core 3 includes an upper pressing portion 31 and a lower pressing portion 32 arranged at the lower end of the upper pressing portion 31 and located directly above the tension spring 4, wherein the upper pressing portion 31 and the lower pressing portion 32 are both semi-cylindrical, and the width of the lower pressing portion 32 is greater than that of the upper pressing portion 31.

[0039] like Figure 1 As shown, the two outer sides of the base 1 each have a side slot 14, and a locking protrusion 141 is provided on the side slot 14; the two outer sides of the lower end of the cover 2 are respectively downwardly provided with an insertion portion 22 for inserting into the side slot 14, and a locking slot 221 is opened on the insertion portion 22 for the locking protrusion 141 to be locked in.

[0040] The micro switch provided by the embodiment of the present invention is suitable for the fields of industry, electronics, machinery, metallurgy, electricity, etc., and is particularly suitable for various electrical appliances and various automobile center consoles.

[0041] The working principle of the embodiment of the present invention is:

[0042] When the micro switch is in a natural state, the left pushing portion 52 of the movable sheet 5 is located at the outer side of the upper giving way block 625, that is, at the position of the upper giving way portion 621, and the left pushing portion 52 does not apply a force to the left movable sheet 62 of the double-leg movable sheet 6. Therefore, the left contact 622 on the left movable sheet 62 is in contact with the left pin 7 and is connected; at the same time, the right pushing portion 53 of the movable sheet 5 is located on the side of the right movable sheet 63 of the double-leg movable sheet 6, and pushes the right movable sheet 63 inwardly, so that the right movable sheet 63 is closed inwardly, so that the right contact 632 on the right movable sheet 63 is separated and disconnected from the right pin 8.

[0043] When the guide core 3 is pressed downward, the guide core 3 applies a downward force to the tension spring 4, and at the same time pushes the movable sheet 5 to move downward, driving the left push part 52 to move downward and leave the upper yielding part 621, and move to the side of the left movable sheet 62 and below the upper yielding block 625, then the left push part 52 pushes the left movable sheet 62 inward, so that the left movable sheet 62 closes inward, so that the left contact 622 on the left movable sheet 62 is separated and disconnected from the left pin 7; at the same time, the movable sheet 5 moves downward and drives the right push part 53 to move downward, and the right push part 53 enters the lower yielding part 631, that is, it is located at the outer side of the lower yielding block 635, then the right push part 53 does not apply a force to the right movable sheet 63 of the double-leg movable sheet 6, so the right movable sheet 63 bounces outward to restore its original state, and the right contact 632 on the right movable sheet 63 is in contact with the right pin 8. When the guide core 3 is released, the micro switch returns to its natural state.

[0044] The main focus of the present invention is that

[0045] (1) By adding a double-foot movable plate and a movable plate with a special structural design, and separately arranging the conduction pins on both sides of the double-foot movable plate, and controlling the opening and closing of the double-foot movable plate through the movable plate, the contact point and the pin on the double-foot movable plate are in lateral contact and separation, thereby realizing the conduction and disconnection function of the micro switch, the contact point and the pin only rub against each other, and the force direction between the two becomes lateral force, which reduces the possibility of mutual wear and greatly improves the service life, and the service life is increased to 80 million times;

[0046] (2) By optimizing and improving the structure of the movable piece, a movable piece yielding portion formed by bending downward is adopted to provide yielding space for the activity of the tension spring. When the size of the micro switch is certain, side space is provided for the installation of the double-foot movable piece, and the structural design is more reasonable and compact;

[0047] (3) The tension spring structure is adopted to increase the arm length of the movable plate, and the adjustable space of the tension spring is larger, so as to achieve a variety of different feel and sound.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, other structures obtained by adopting the same or similar technical features as the above-mentioned embodiments of the present invention are within the protection scope of the present invention.

Claims

1. A micro switch with a long service life, comprising a base and a cover with an upper opening, wherein the cover is covered on the base to form a receiving cavity, wherein a guide core is arranged in the receiving cavity, and the upper end of the guide core moves up and down in the upper opening of the cover, wherein: The cam is a movable plate which is fixed to the base and has a plurality of movable plates which are respectively arranged in the accommodating cavity and mounted on the base, a left pin which is inserted into the base and is located on the left outer side of the double-leg movable plate, and a right pin which is inserted into the base and is located on the right outer side of the double-leg movable plate. The movable plate includes a front horizontal movable part and a rear horizontal movable part which is parallel to the front horizontal movable part. The double-leg movable plate includes a movable plate pin which is inserted into the base, and a left movable plate and a right movable plate which are arranged on the movable plate pin and are relatively arranged. The upper side edge of the end of the left movable plate is bent inwardly to form an upper yielding part, a left contact is arranged on the inner side of the left movable plate and located on the side of the left pin, the lower side edge of the end of the right movable plate is bent inwardly to form a lower yielding part, and a right contact is arranged on the outer side of the right movable plate and located on the side of the right pin. The rear end of the movable plate is bent downwardly to form a part for the tension spring to be embedded in. The movable piece yielding part, and one end of the tension spring is connected to the movable piece, and the other end is connected to the base. At the same time, a left pushing part is arranged on the left side edge of the front end of the movable piece and located at the outer side edge of the left movable piece end, and a right pushing part is arranged on the right side edge of the front end of the movable piece and located at the outer side edge of the right movable piece end; the movable piece also includes a connecting part connected to the lower front end part of the front horizontal movable part, the left pushing part is connected to the left end of the connecting part, the right pushing part is connected to the right end of the connecting part, and the left pushing part and the right pushing part are both pushing convex points, an upper strip opening is opened downwardly at the upper side of the left movable piece end, an upper yielding block is formed on the upper side of the left movable piece end, the upper yielding part is formed by bending the upper yielding block inwardly, and the lower side of the right movable piece end is formed by bending the lower yielding block inwardly.

2. The long-life micro switch according to claim 1, characterized in that: An embedding groove is provided on the upper end surface of the base and below the yielding portion of the movable sheet, and a hook block is provided at the rear end of the base, and a rear hook hole is provided on the hook block; a front hook hole is provided at the front end of the movable sheet; the front end of the tension spring is hooked on the front hook hole, and the rear end is hooked on the rear hook hole.

3. The long-life micro switch according to claim 1, characterized in that: A limit block is arranged at the front end of the base, and the limit block includes a vertical insertion block fixedly inserted into the base, a horizontal limit block arranged at the upper end of the vertical insertion block and bent inwardly, a horizontal insertion block arranged at the lower end of the vertical insertion block and bent inwardly, and a lower limit protrusion arranged at the end of the horizontal insertion block and bent upwardly, wherein the horizontal limit block is located directly above the front end of the movable piece, and the lower limit protrusion is located directly below the front end of the movable piece.

4. The long-life micro switch according to claim 2, characterized in that: A limiting groove for inserting the rear end of the movable sheet is arranged at the rear end of the base, and the hook block is inserted into the rear end surface of the limiting groove.

5. The long-life micro switch according to claim 1, characterized in that: The rear horizontal movable part is parallel to the front horizontal movable part; an inclined movable part is connected between the rear end of the front horizontal movable part and the front end of the rear horizontal movable part, wherein the movable piece yielding part is formed by matching the inclined movable part with the rear horizontal movable part.

6. The long-life micro switch according to claim 1, characterized in that: The rear ends of the left movable plate and the right movable plate are respectively connected to the upper end of the movable plate pin through a connecting block, and the connecting block is composed of a vertical connecting part and a parallel connecting part, and the overall shape is 7; the rear ends of the left movable plate and the right movable plate are respectively bent inward to form an upper bending part connected to the side of the vertical connecting part of the connecting block, and the end of the parallel connecting part of the connecting block is bent outward to form a lower bending part connected to the upper end of the movable plate pin; the connecting block as a whole is tilted inward from one side of the upper bending part and is connected to the movable plate pin.

7. The long-life micro switch according to claim 1, characterized in that: The guide core includes an upper pressing portion and a lower pressing portion arranged at the lower end of the upper pressing portion and located directly above the tension spring, wherein the upper pressing portion and the lower pressing portion are both semi-cylindrical, and the width of the lower pressing portion is greater than that of the upper pressing portion.

8. The long-life micro switch according to claim 1, characterized in that: The two outer sides of the base are respectively provided with a side slot, and a locking protrusion is arranged on the side slot; the two outer sides of the lower end of the cover are respectively downwardly provided with an insertion part inserted into the side slot, and a slot for the locking protrusion to be locked in is opened on the insertion part.

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