Microswitch

Abstract

The utility model provides a microswitch. The microswitch comprises a switch housing; the deflector rod, the push rod and the swing rod assembly are installed on the switch shell, the swing rod assembly is installed on the third current-carrying piece in a swing mode, and a movable contact is arranged at the end of the swing rod assembly; the first current-carrying piece and the second current-carrying piece are arranged on the switch shell and are respectively provided with a first current-carrying plate and a second current-carrying plate which are arranged in parallel up and down, and the first current-carrying plate and the second current-carrying plate are respectively provided with a contact mounting part positioned in the switch shell and a pin part extending out of the switch shell; a static contact corresponding to the movable contact is arranged on the contact mounting part; and the magnetic steel is installed between the first current-carrying piece and the second current-carrying piece, the extension direction of the magnetic steel is perpendicular to the extension direction of the first current-carrying plate and the extension direction of the second current-carrying plate, and the magnetic steel is arranged corresponding to the static contact and the movable contact. The magnetic field generated by the magnetic steel can lengthen the electric arc, so that the electric arc can be quickly extinguished, the ablation time of the electric arc to the contact is reduced, and the service life of the switch is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a micro switch. Background Art

[0002] The existing push button switch includes a button, a push rod, a moving contact and a stationary contact. The push rod drives the moving contact to make contact with the stationary contact to connect or disconnect. When the current flowing through the moving contact and the stationary contact is larger, an arc will be generated during disconnection. The arc will easily cause the contacts to burn under the action of the arc for a long time, thereby shortening the service life of the switch. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect of short service life of the switch in the prior art, thereby providing a micro switch with long service life.

[0004] To this end, the utility model provides a micro switch, including a switch housing, a lever, a push rod, a first current-carrying member of a rocker assembly, a second current-carrying member and a magnetic steel, the lever, the push rod and the rocker assembly are all installed on the switch housing, the lever is located at the top of the switch housing, the push rod has a first rod portion extending out of the switch housing and cooperating with the lever, and a second rod portion located in the switch housing and cooperating with the rocker assembly, the rocker assembly is swingably installed on the third current-carrying member, and a moving contact is provided at its end; the first current-carrying member and the second current-carrying member are arranged at The switch housing is provided with a first current-carrying plate and a second current-carrying plate which are arranged in parallel up and down, respectively. The first current-carrying plate and the second current-carrying plate both have a contact mounting portion located in the switch housing and a pin portion extending out of the switch housing. The contact mounting portion is provided with a static contact which is arranged corresponding to the moving contact. A magnetic steel is installed between the first current-carrying member and the second current-carrying member, and an extension direction of the magnetic steel is perpendicular to an extension direction of the first current-carrying plate and the second current-carrying plate, and the magnetic steel is arranged corresponding to the static contact and the moving contact.

[0005] The switch housing comprises a cover plate and a base which are buckled together. The base is formed with an opening slot suitable for installing the magnetic steel, and the opening of the opening slot is arranged toward the cover plate.

[0006] The cover plate is assembled with the base through an elastic snap-fit ​​structure, and the elastic snap-fit ​​structure includes: a plurality of snap blocks distributed on the outer wall of the base; a plurality of elastic arms distributed on the edge of the cover plate and extending toward the base, and the elastic arms are formed with snap-fit ​​grooves adapted to snap-fit ​​with the snap blocks.

[0007] The lever comprises a third rod portion matched with the push rod, and a fourth rod portion bent and connected to the third rod portion and assembled with the switch housing. Both sides of the fourth rod portion in the width direction are provided with inserting blocks inserted into corresponding slots on the inner wall of the switch housing.

[0008] A dustproof ring is installed in the switch housing, and a through hole is formed in the middle of the dustproof ring for the first rod portion of the push rod to pass through.

[0009] A dustproof rib is arranged on an edge of one side of the base facing the cover plate, and a groove matching the dustproof rib is formed on the cover plate.

[0010] The technical solution of the utility model has the following advantages:

[0011] 1. The micro switch provided by the utility model comprises a switch housing, a lever, a push rod, a rocker assembly, a first current-carrying member, a second current-carrying member and a magnetic steel. The first current-carrying member and the second current-carrying member are arranged on the switch housing, and are respectively provided with a first current-carrying plate and a second current-carrying plate arranged in parallel up and down. The first current-carrying plate and the second current-carrying plate both have a contact mounting portion located in the switch housing, and a pin portion extending out of the switch housing. A static contact corresponding to the moving contact is provided on the contact mounting portion. The magnetic steel is installed between the first current-carrying member and the second current-carrying member, and the extension direction of the magnetic steel is arranged perpendicular to the extension direction of the first current-carrying plate and the second current-carrying plate. The magnetic steel is arranged corresponding to the static contact and the moving contact. The magnetic field generated by the magnetic steel can lengthen the arc, which helps to quickly extinguish the arc, reduce the arc ablation time on the contacts, and extend the service life of the switch.

[0012] 2. The micro switch provided by the utility model has an open groove formed on the base suitable for installing a magnet, and the opening of the open groove is arranged toward the cover plate. When the cover plate is buckled with the base, the magnet can be shielded, thereby achieving separation of the arc and the magnet, thereby better protecting the magnet from the influence of the arc.

[0013] 3. The micro switch provided by the utility model comprises a lever including a third rod portion matched with the push rod, and a fourth rod portion bent and connected to the third rod portion and assembled with the switch housing. Both sides of the fourth rod portion in the width direction are provided with plug blocks inserted into corresponding slots on the inner wall of the switch housing. During assembly, the plug block on one side of the lever is first inserted into the slot of the base, and then the cover plate is buckled. The plug block on the other side of the lever can be inserted into the slot of the cover plate, thereby preventing the lever from being separated from the switch housing. The above structure has the advantages of simple structure and quick and convenient assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the micro switch of the utility model;

[0016] Figure 2 Schematic diagram of the exploded structure of the micro switch.

[0017] Explanation of the reference numerals: 1. switch housing; 2. lever; 3. push rod; 4. rocker assembly; 5. first rod portion; 6. second rod portion; 7. third current-carrying member; 8. moving contact; 9. first current-carrying member; 10. second current-carrying member; 11. first current-carrying plate; 12. second current-carrying plate; 13. contact mounting portion; 14. pin portion; 15. static contact; 16. magnet; 17. cover plate; 18. base; 19. opening slot; 20. block; 21. elastic arm; 22. slot; 23. third rod portion; 24. fourth rod portion; 25. slot; 26. plug-in block; 27. dustproof ring; 28. dustproof rib. DETAILED DESCRIPTION

[0018] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] Example

[0023] This embodiment provides a micro switch, such as Figure 1 As shown, it includes a switch housing 1, a lever 2, a push rod 3, a rocker assembly 4, a first current-carrying component 9, a second current-carrying component 10 and a magnetic steel 16.

[0024] Switch housing 1, such as Figure 2 As shown, it includes a cover plate 17 and a base 18 that are snap-fitted, and the base 18 is formed with an open slot 19 suitable for installing the magnetic steel 16, and the opening of the open slot 19 is arranged toward the cover plate 17. The cover plate 17 is assembled with the base 18 through an elastic snap-fit ​​structure, and the elastic snap-fit ​​structure includes: a plurality of card blocks 20 distributed on the outer wall of the base 18; a plurality of elastic arms 21 distributed on the edge of the cover plate 17 and extending toward the base 18, and the elastic arms 21 are formed with card slots 22 that are adapted to snap with the card blocks 20. In this embodiment, a dustproof rib 28 is provided on the edge of one side of the base 18 facing the cover plate 17, and a groove (not shown in the figure) adapted to the dustproof rib 28 is formed on the cover plate 17.

[0025] The lever 2 is mounted on the top of the switch housing 1. Figure 2As shown, the lever 2 includes a third rod portion 23 that cooperates with the push rod 3, and a fourth rod portion 24 that is bent and connected to the third rod portion 23 and assembled with the switch housing 1. The fourth rod portion 24 is provided with insert blocks 26 inserted into the corresponding slots 25 on the inner wall of the switch housing 1 on both sides of the width direction, and the insert blocks 26 can swing in the slots 25. The push rod 3 has a first rod portion 5 that extends out of the switch housing 1 and cooperates with the lever 2, and a second rod portion 6 that is located in the switch housing 1 and cooperates with the swing rod assembly 4. In this embodiment, a dust ring 27 is installed in the switch housing 1, and a through hole is formed in the middle of the dust ring 27 for the first rod portion 5 of the push rod 3 to pass through. The swing rod assembly 4 is swingably installed on the third current-carrying member 7, and its end has a moving contact 8. It should be noted that the swing rod assembly 4 is an existing mature technology, so its specific structure and working principle are not described in detail.

[0026] like Figure 2 As shown, the first current-carrying member 9 and the second current-carrying member 10 are arranged on the switch housing 1, and are respectively provided with a first current-carrying plate 11 and a second current-carrying plate 12 arranged in parallel up and down, and the first current-carrying plate 11 and the second current-carrying plate 12 both have a contact mounting portion 13 located in the switch housing 1, and a pin portion 14 extending out of the switch housing 1, and a static contact 15 corresponding to the moving contact 8 is provided on the contact mounting portion 13.

[0027] The magnetic steel 16 is installed between the first current-carrying member 9 and the second current-carrying member 10, and the extension direction of the magnetic steel 16 is perpendicular to the extension direction of the first current-carrying plate 11 and the second current-carrying plate 12. The magnetic steel 16 is arranged corresponding to the static contact 15 and the moving contact 8.

[0028] In the micro switch provided by the utility model, the magnet 16 is installed between the first current-carrying member 9 and the second current-carrying member 10, and the extension direction of the magnet 16 is perpendicular to the extension direction of the first current-carrying plate 11 and the second current-carrying plate 12. The magnet 16 is arranged corresponding to the static contact 15 and the moving contact 8. The magnetic field generated by the magnet 16 can lengthen the arc, which helps to extinguish the arc quickly, reduce the arc erosion time on the contacts, and extend the service life of the switch.

[0029] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A micro switch, characterized in that: include: Switch housing (1); A lever (2), a push rod (3) and a swing rod assembly (4) are mounted on the switch housing (1); the lever (2) is located at the top of the switch housing (1); the push rod (3) has a first rod portion (5) extending out of the switch housing (1) and cooperating with the lever (2); and a second rod portion (6) located inside the switch housing (1) and cooperating with the swing rod assembly (4); the swing rod assembly (4) is swingably mounted on a third current-carrying member (7), and a moving contact (8) is provided at its end; A first current-carrying member (9) and a second current-carrying member (10) are arranged on the switch housing (1), and are respectively provided with a first current-carrying plate (11) and a second current-carrying plate (12) arranged in parallel up and down, the first current-carrying plate (11) and the second current-carrying plate (12) both having a contact mounting portion (13) located inside the switch housing (1) and a pin portion (14) extending outside the switch housing (1), and the contact mounting portion (13) is provided with a static contact (15) arranged corresponding to the moving contact (8); A magnetic steel (16) is installed between the first current-carrying member (9) and the second current-carrying member (10), and the extension direction of the magnetic steel (16) is perpendicular to the extension direction of the first current-carrying plate (11) and the second current-carrying plate (12), and the magnetic steel (16) is arranged corresponding to the static contact (15) and the moving contact (8).

2. The micro switch according to claim 1, characterized in that: The switch housing (1) comprises a cover plate (17) and a base (18) which are arranged in a buckled manner, the base (18) being formed with an opening groove (19) suitable for installing the magnetic steel (16), and the opening of the opening groove (19) is arranged toward the cover plate (17).

3. The micro switch according to claim 2, characterized in that: The cover plate (17) is assembled with the base (18) via an elastic clamping structure, wherein the elastic clamping structure comprises: A plurality of card blocks (20) are distributed on the outer wall of the base (18); A plurality of elastic arms (21) are distributed on the edge of the cover plate (17) and extend toward the base (18); the elastic arms (21) are formed with a card slot (22) adapted to be card-engaged with the card block (20).

4. The micro switch according to claim 1, characterized in that: The lever (2) comprises a third rod portion (23) matched with the push rod (3), and a fourth rod portion (24) bent and connected to the third rod portion (23) and assembled with the switch housing (1); both sides of the fourth rod portion (24) in the width direction are provided with insert blocks (26) inserted into corresponding slots (25) on the inner wall of the switch housing (1).

5. The micro switch according to claim 1, characterized in that: A dustproof ring (27) is installed in the switch housing (1), and a through hole is formed in the middle of the dustproof ring (27) for the first rod portion (5) of the push rod (3) to pass through.

6. The micro switch according to claim 2, characterized in that: A dustproof rib (28) is provided on an edge of one side of the base (18) facing the cover plate (17), and a groove adapted to the dustproof rib (28) is formed on the cover plate (17).

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