Large-current microswitch

Abstract

The utility model provides a heavy current microswitch, which comprises a shell and a conductive assembly, the shell is provided with a press key, the conductive assembly comprises a swing piece, a first electric connecting piece and two second electric connecting pieces, one end of the swing piece is connected to the first electric connecting piece, the other end of the swing piece is provided with a movable contact, and the two second electric connecting pieces are connected with the movable contact. A fixed contact is arranged on the second electric connecting piece, a first extension part is formed on the first electric connecting piece, a swing groove is formed in the first extension part, an elastic piece is arranged in the swing groove and comprises a straight part and an arc-shaped part, the straight part abuts against the swing groove, the arc-shaped part is elastically pressed at the position, close to the movable contact, of the swing piece, and the arc-shaped part abuts against the arc-shaped part. The static contact is provided with a plurality of protruding sections which are arranged at intervals. Aiming at the defects in the prior art, the utility model provides the large-current microswitch which can reduce electric arc and increase contact reliability.

Description

Technical Field

[0001] This utility model relates to the field of switches, and in particular to a high-current micro switch. Background Technology

[0002] Microswitches are widely used in various electronic and electrical devices, primarily for detecting and controlling the switching state of circuits. Their main characteristics are low actuation force and fast switching response, making them suitable for applications requiring precise control. A microswitch typically includes a housing and conductive components. The housing has a push button, and the conductive components include an elastic element, a stationary contact, and a moving contact mounted on a swinging element. The moving contact contacts the stationary contact through the sudden deformation of the elastic element, and the closing and opening of the contacts are achieved through the compression and release of the elastic element. However, with the increasing application of microswitches in household appliances, electronic devices, automation equipment, and automotive electronics, there is a need to make them more suitable for high-current environments. Existing microswitches have a small moving contact amplitude and a small distance between the moving and stationary contacts, which can easily lead to arcing. Furthermore, both contacts require further optimization to adapt to high-current environments. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a high-current micro switch that reduces electric arcing and increases contact reliability.

[0004] To achieve the above objectives, this utility model provides a high-current micro switch, comprising a housing and a conductive component. The housing is provided with a push button. The conductive component includes a swing element, a first electrical connector, and two second electrical connectors. One end of the swing element is connected to the first electrical connector, and the other end of the swing element has a moving contact. The second electrical connectors have stationary contacts. The push button can push the swing element to swing until its moving contact abuts against one of its stationary contacts. The swing element can elastically return to its original position until its moving contact abuts against the other stationary contact. The first electrical connector extends towards the stationary contact and bends at its end to form a first extension portion passing through the middle of the swing element. The first extension portion has a swing groove, positioned below the connection point between the swing element and the first electrical connector. A spring piece is provided in the swing groove, comprising a straight portion and an arc-shaped portion. The straight portion abuts against the swing groove, and the arc-shaped portion elastically presses against the swing piece near the moving contact. The stationary contact has several spaced-apart protrusions.

[0005] The advantages of the above technical solution are: by extending the first electrical connector toward the stationary contact and bending it at the end to form a first extension portion passing through the middle of the swing member, and setting a swing groove and a spring piece located in the swing groove, the spring piece is configured with a straight portion and an arc-shaped portion. The straight portion abuts against the swing groove of the extension portion, and the arc-shaped portion is elastically pressed against the position of the swing piece near the moving contact. The spring piece provides elasticity, allowing the swing member to have a larger swing amplitude. This allows for a relatively larger distance between the two stationary contacts, avoiding the generation of electric arcs, and is more suitable for high-current microswitches. The first extension is formed by bending the end of the first electrical connector, and a swing groove is provided on the first extension, which increases the stability of the structure and reduces mechanical vibration when a large current passes through. Finally, several spaced protrusions are provided on the stationary contact to make the surface of the stationary contact wavy, which increases the actual contact area of ​​the contact, helps to disperse the current density, reduces the risk of contact overheating and damage, and the wavy contact can reduce the generation of electric arc, because electric arc tends to be generated at the peak of the contact. In addition, the wavy design can also reduce contact wear, extend the service life of the switch, and make it more stable.

[0006] The present invention can be further configured such that the first extension extends to abut against the inner wall of the housing.

[0007] By further designing the first extension to abut against the inner wall of the housing, the first extension can limit the swinging member through which it is inserted and also limit its swinging direction, thereby further enhancing stability.

[0008] The present invention can be further configured as follows: the shell is formed by assembling a base and a cover plate; the base is provided with an abutting part around it; the abutting part is provided with notches and corresponding snap-fit ​​parts on both sides of the base; the cover plate is fitted onto the base and can form an abutting and limiting fit with the abutting part; the cover plate is provided with buckles on both sides; the buckles can be inserted into the notches and form a snap-fit ​​fit with the snap-fit ​​parts.

[0009] By further designing the housing, the shell is formed by assembling a base and a cover plate, which facilitates the installation of each component. On this basis, an abutment part is provided around the base, and notches and corresponding snap-fit ​​parts are provided on both sides of the base corresponding to the abutment part. A buckle part is provided on the cover plate. After the base and cover plate are assembled, the buckle part can be inserted into the notch and form a snap-fit ​​engagement with the snap-fit ​​part, forming the initial positioning of the base and cover plate, which facilitates installation.

[0010] The present invention can be further configured as follows: the base has a groove and a slot above the groove on the inner wall at the end away from the stationary contact; the first electrical connector has a second extension for the swinging component to swing on the outside of the groove; after the swinging component is fitted into the second extension, its end extends into the groove; the cover plate has a protrusion inserted into the slot; the protrusion and the second extension can cover the groove.

[0011] By further designing the base, a groove and a slot are provided at the end away from the stationary contact point, and a second extension for the swinging component to swing on the first electrical connector is provided. A protrusion is provided on the cover plate for insertion into the slot. The groove is covered by the second extension and the protrusion, and the end of the swinging component used to swing in conjunction with the second extension is also limited, preventing the swinging component from coming out and ensuring stability during use.

[0012] The present invention can be further configured such that: the base is provided with a plurality of countersunk holes with ring shoulders, and the cover plate is provided with cylindrical protrusions, the protrusions being inserted into the countersunk holes and engaging with the ring shoulders.

[0013] By further configuring the base with countersunk holes featuring shoulder rings and the cover plate with cylindrical protrusions, the protrusions are inserted into the countersunk holes and abut against the shoulder rings, providing guidance for installation and strengthening the connection between the cover plate and the base, thus further enhancing the stability of the connection. Attached Figure Description

[0014] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present utility model;

[0016] Figure 3 This is a schematic diagram of the conductive component in an embodiment of the present invention;

[0017] Figure 4 This is a schematic diagram of the cover plate in an embodiment of the present utility model;

[0018] The components include: housing 1; push button 11; base 12; abutting part 121; notch 122; snap-fit ​​part 123; groove 124; slot 125; countersunk hole 126; cover plate 13; buckle part 131; protrusion 132; protruding post 133; conductive component 2; swinging part 21; moving contact 211; first electrical connector 22; stationary contact 221; protruding section 2211; first extension part 222; swing groove 223; second extension part 224; second electrical connector 23; spring piece 3; straight part 31; and arc-shaped part 32. Detailed Implementation

[0019] An example of this utility model is a high-current micro switch. Figure 1-4 As shown: The device includes a housing 1 and a conductive component 2. The housing 1 has a push button 11. The conductive component 2 includes a swing member 21, a first electrical connector 22, and two second electrical connectors 23. One end of the swing member 21 is connected to the first electrical connector 22, and the other end of the swing member 21 has a moving contact 211. The second electrical connectors 22 have stationary contacts 221. The push button 11 can push the swing member 21 to swing until its moving contact 211 abuts against one of its stationary contacts 221. The swing member 21 can elastically return to its original position until its moving contact 211 abuts against the other stationary contact 221. The first electrical connector 21... The connector 22 extends toward the stationary contact 221 and bends at the end to form a first extension 222 passing through the middle of the swing member 21. The first extension 222 is provided with a swing groove 223. The position of the swing groove 223 is lower than the connection point between the swing member 21 and the first electrical connector 22. A spring piece 3 is provided in the swing groove 223. The spring piece 3 includes a straight part 31 and an arc-shaped part 32. The straight part 31 abuts against the swing groove 223. The arc-shaped part 32 elastically presses against the swing piece 21 near the moving contact. The stationary contact 221 is provided with a number of spaced protrusions 2211.

[0020] The first extension 222 extends to abut against the inner wall of the housing 1.

[0021] The housing 1 is formed by assembling a base 12 and a cover plate 13. The base 12 is surrounded by an abutment portion 121. The abutment portion 121 has notches 122 and corresponding snap-fit ​​portions 123 on both sides of the base 12. The cover plate 13 is fitted onto the base 12 and can form an abutment and limiting engagement with the abutment portion 121. The cover plate 13 has buckles 131 on both sides. The buckles 131 can be inserted into the notches 122 and form a snap-fit ​​engagement with the snap-fit ​​portions 123.

[0022] The base 12 has a groove 124 and a slot 125 located above the groove 124 on the inner wall of the end away from the stationary contact 221. The first electrical connector 22 has a second extension 224 formed on the outside of the groove 124 for the swing member 21 to swing and be fitted. After the swing member 21 is fitted into the second extension 224, its end extends into the groove 124. The cover plate 13 has a protrusion 132 inserted into the slot 125. The protrusion 132 and the second extension 224 can cover the groove 124.

[0023] The base 12 is provided with a plurality of countersunk holes 126 with ring shoulders, and the cover plate 13 is provided with cylindrical protrusions 133, which are inserted into the countersunk holes 126 and abut against the ring shoulders.

[0024] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.

Claims

1. A high-current micro switch, comprising a housing and a conductive component, wherein a push button is provided on the housing, and the conductive component includes a swing element, a first electrical connector, and two second electrical connectors, one end of the swing element is connected to the first electrical connector, and the other end of the swing element is provided with a moving contact; the second electrical connectors are provided with stationary contacts; the push button can push the swing element to swing until its moving contact abuts against one of its stationary contacts, and the swing element can elastically return to its original position until its moving contact abuts against the other stationary contact, characterized in that: The first electrical connector extends toward the stationary contact and bends at its end to form a first extension portion passing through the middle of the swing member. The first extension portion is provided with a swing groove, the position of which is lower than the connection point between the swing member and the first electrical connector. A spring piece is provided in the swing groove, the spring piece including a straight portion and an arc-shaped portion. The straight portion abuts against the swing groove, and the arc-shaped portion is elastically pressed against the swing piece near the moving contact. The stationary contact is provided with a number of spaced protrusions.

2. The high-current micro switch according to claim 1, characterized in that: The first extension extends to abut against the inner wall of the housing.

3. The high-current micro switch according to claim 1 or 2, characterized in that: The housing is formed by assembling a base and a cover plate. The base is surrounded by an abutment portion. The abutment portion has notches and corresponding snap-fit ​​portions on both sides of the base. The cover plate is fitted onto the base and can form an abutment and limiting engagement with the abutment portion. The cover plate has buckles on both sides. The buckles can be inserted into the notches and form a snap-fit ​​engagement with the snap-fit ​​portions.

4. The high-current micro switch according to claim 3, characterized in that: The base has a groove and a slot above the groove on the inner wall at the end away from the stationary contact. The first electrical connector has a second extension on the outside of the groove for the swinging component to swing and be fitted. After the swinging component is fitted into the second extension, its end extends into the groove. The cover plate has a protrusion inserted into the slot. The protrusion and the second extension can cover the groove.

5. The high-current micro switch according to claim 3, characterized in that: The base is provided with several countersunk holes with ring shoulders, and the cover plate is provided with cylindrical protrusions, which are inserted into the countersunk holes and abut against the ring shoulders.

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