Contact structure and switch
By using the clamping arm and protrusion design of the clamping component, combined with the elastic element, the moving contact is clamped and the Lorentz force is utilized, which solves the problem of insufficient breaking and short-circuit resistance of the contact structure, and achieves stable contact and improved resistance to current surges.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-03-24
AI Technical Summary
Existing contact structures are inadequate in terms of breaking capacity and short-circuit withstand capability, especially the snap-fit contact method, which is not conducive to improving the short-circuit withstand capability of the contact structure.
The clamping arm design, which includes a bent clamping arm and a protrusion, combined with an elastic element, clamps the moving contact and increases the clamping force of the clamping arm through Lorentz force, thereby achieving stable contact between the moving contact and the stationary contact.
The breaking capacity and short-circuit withstand capability of the contact structure have been improved, ensuring reliable contact between the moving contact and the stationary contact, and enhancing the switch's resistance to current surges.
Smart Images
Figure CN224036242U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to low voltage electrical apparatus technical field especially relates to a contact structure and switch. BACKGROUND
[0002] The contact structure is one of the key components of switch electrical apparatus, wherein, the snap contact structure as a major category of the contact structure is widely used in low voltage switch electrical apparatus products.
[0003] In the related art, the moving contact and the static contact of the contact structure are snap contacted, that is, the conduction is realized by the way of line or surface contact, which is beneficial to the breaking of the contact structure, but is not conducive to the short-circuit resistance of the contact structure. Therefore, there is an urgent need for a contact structure and switch to solve the above technical problems. SUMMARY
[0004] One purpose of the utility model is to provide a contact structure that can balance breaking and short-circuit resistance.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] A contact structure is provided, comprising:
[0007] a base;
[0008] a static contact provided on the base, the static contact being provided with a static contact point;
[0009] a clamping piece provided on the base, the clamping piece comprising two oppositely arranged clamping arms;
[0010] a moving contact rotatably provided on the base, the moving contact being clamped between the two clamping arms and being in contact with the two clamping arms and the static contact point for conduction.
[0011] Optionally, the clamping piece further comprises a support plate connected to the clamping arms, and the side of the static contact away from the static contact point is in close contact with the support plate.
[0012] Optionally, the clamping arm comprises a first plate, a second plate and a third plate that are sequentially bent, the first plate is connected to the support plate, the second plate is bent relative to the first plate in a direction close to the support plate, and the third plate is opposite to the bending direction of the second plate relative to the first plate, and the third plate is used for clamping the moving contact.
[0013] Optionally, the clamping arm further comprises a fourth plate connected to the third plate, and the fourth plate is opposite to the bending direction of the third plate relative to the second plate.
[0014] Optionally, the clamping arms are provided with protrusions for clamping the movable contact.
[0015] Optionally, the movable contact comprises a contact portion provided with a movable contact point capable of being in contact with the stationary contact point.
[0016] When the movable contact is released from the clamping of the two clamping arms, the gap distance between the two protrusions along the rotation axis of the movable contact is greater than the width of the movable contact point.
[0017] Optionally, the contact portion comprises a connecting surface and two parallel contact surfaces.
[0018] The connecting surface is located between the two contact surfaces along the rotation axis of the movable contact, and a transition surface is provided between the contact surfaces and the connecting surface.
[0019] The movable contact point is provided on the connecting surface.
[0020] The two contact surfaces are provided in one-to-one correspondence with the two clamping arms, and the clamping arms can abut against the corresponding contact surfaces.
[0021] When the movable contact is released from the clamping of the two clamping arms, the gap distance between the two protrusions along the rotation axis of the movable contact is less than the gap distance between the two contact surfaces.
[0022] Optionally, the base has a positioning groove, and the clamping member is provided in the positioning groove.
[0023] Optionally, the positioning groove comprises two oppositely arranged groove side walls, and the two groove side walls are provided in one-to-one correspondence with the two clamping arms. A first elastic member is provided between the corresponding groove side wall and the clamping arm, and the first elastic member is configured to provide a force for clamping the movable contact by the clamping arm.
[0024] Optionally, the groove side wall is provided with a first limiting groove, and a first end of the first elastic member is provided in the first limiting groove.
[0025] And / or, the clamping arm is provided with a second limiting groove, and a second end of the first elastic member is provided in the second limiting groove.
[0026] Another purpose of the utility model is to provide a switch comprising the above-mentioned contact structure.
[0027] Beneficial effects: the contact structure provided by the utility model, when the moving contact is clamped between the two clamping arms and is in contact with the two clamping arms and the static contact point, the clapping contact mode of the moving contact and the static contact point can make the contact structure have good breaking capacity, and the Lorentz force generated by the current flowing between the two clamping arms can make the two clamping arms clamp the moving contact, which is beneficial to improving the short-circuit resistance of the contact structure.
[0028] The switch provided by the utility model has the advantages that the setting of the contact structure can simultaneously consider breaking capacity and short-circuit resistance. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 is a partial structure schematic view of the contact structure provided by the utility model;
[0030] Figure 2 is a structure schematic view of the switch provided by the utility model;
[0031] Figure 3 is a partial structure schematic view of the contact structure at the clamping piece provided by the utility model;
[0032] Figure 4 is a partial structure schematic view of the contact structure at the moving contact provided by the utility model;
[0033] Figure 5 is a structure schematic view of the moving contact provided by the utility model;
[0034] Figure 6 is a partial structure schematic view of the contact structure provided by the utility model;
[0035] Figure 7 is a partial structure schematic view of the base provided by the utility model;
[0036] Figure 8 is another partial structure schematic view of the contact structure at the moving contact provided by the utility model.
[0037] In the drawings:
[0038] 100, base; 110, positioning groove; 111, groove side wall; 120, first limiting groove;
[0039] 200, static contact; 210, static contact point;
[0040] 300, clamping piece; 310, clamping arm; 3101, protruding part; 3102, second limiting groove; 311, first plate; 312, second plate; 313, third plate; 314, fourth plate; 320, support plate;
[0041] 400, moving contact; 401, long hole; 410, contact part; 411, connecting surface; 412, contact surface; 413, transition surface; 420, moving contact point;
[0042] 500, first elastic member;
[0043] 610, hinged frame; 620, first shaft; 630, second shaft; 640, second elastic member;
[0044] 700, swing lever;
[0045] 800, connecting rod. DETAILED DESCRIPTION
[0046] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model and are not limited to the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.
[0047] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0048] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0049] In the description of the embodiment, the terms "upper", "lower", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.
[0050] Referring to Figure 1 and Figure 2 , the embodiment provides a contact structure, which comprises a base 100, a static contact 200, a clamping piece 300 and a dynamic contact 400.
[0051] Specifically, the static contact 200 and the clamping piece 300 are both arranged on the base 100, the static contact 200 is provided with a static contact point 210, the clamping piece 300 comprises two oppositely arranged clamping arms 310, and the dynamic contact 400 is rotationally arranged on the base 100 and can be clamped between the two clamping arms 310 and is in contact with the two clamping arms 310 and the static contact point 210.
[0052] In the embodiment, when the dynamic contact 400 is clamped between the two clamping arms 310 and is in contact with the two clamping arms 310 and the static contact point 210, the butt joint contact mode of the dynamic contact 400 and the static contact point 210 can make the contact structure have good breaking capacity, and the Lorentz force generated by the current flowing between the two clamping arms 310 can make the two clamping arms 310 clamp the dynamic contact 400, which is beneficial to improve the short-circuit resistance of the contact structure. Wherein, the breaking capacity refers to the arc extinguishing capacity of the contact structure when breaking, and the breaking of the contact structure refers to the dynamic contact 400 being separated from the two clamping arms 310 and the static contact point 210; the short-circuit resistance refers to the ability of the contact structure to withstand a large current impact when being connected; and the connection of the contact structure refers to the dynamic contact 400 being clamped between the two clamping arms 310 and being in contact with the two clamping arms 310 and the static contact point 210.
[0053] Exemplarily, along the rotation axis direction of the dynamic contact 400, the static contact point 210 can be located between the two clamping arms 310.
[0054] Exemplarily, the static contact point 210 can be welded on the static contact 200.
[0055] Exemplarily, the static contact point 210 is arranged at one end of the static contact 200, and along the rotation axis direction of the dynamic contact 400, the static contact point 210 is located at the middle position of the static contact 200, so that the static contact point 210 is adapted to be in contact with the dynamic contact 400.
[0056] In the embodiment, referring to Figure 1 and Figure 3 , the clamping piece 300 further comprises a support plate 320 connected with the clamping arms 310, and the side of the static contact 200 away from the static contact point 210 is fitted with the support plate 320, so as to facilitate the positioning and assembly between the static contact 200 and the clamping piece 300.
[0057] Exemplarily, the clamping piece 300 can be a U-shaped plate structure.
[0058] Exemplarily, the static contact 200 can be a plate structure.
[0059] Exemplarily, the static contact 200 and the support plate 320 can be fastened on the base 100 by screws.
[0060] In a feasible implementation, the clamping arm 310 comprises a first plate 311, a second plate 312 and a third plate 313 which are sequentially bent, the first plate 311 is connected with the support plate 320, the second plate 312 is arranged in a direction close to the support plate 320 relative to the first plate 311, the third plate 313 is arranged opposite to the bending direction of the second plate 312 relative to the bending direction of the first plate 311, and the third plate 313 is used for clamping the moving contact 400. In the embodiment, the first plate 311 and the second plate 312 can give way to the moving contact 400, can reduce the contact area between the clamping arm 310 and the moving contact 400, and make the clamping arm 310 have good elastic deformation, so as to make the third plate 313 stably abut against the moving contact 400, realize the stable clamping of the two clamping arms 310 to the moving contact 400, and ensure the short circuit resistance of the contact structure.
[0061] In a feasible implementation, the clamping arm 310 further comprises a fourth plate 314 connected with the third plate 313, the bending direction of the fourth plate 314 relative to the third plate 313 is opposite to the bending direction of the third plate 313 relative to the second plate 312, that is, the two fourth plates 314 are bent in directions away from each other, and can guide the moving contact 400 to be inserted between the two clamping arms 310.
[0062] In a feasible implementation, the clamping arm 310 is provided with a protruding portion 3101, and the protruding portion 3101 is arranged on the third plate 313. The protruding portion 3101 is used for clamping the moving contact 400, can further reduce the contact area between the clamping arm 310 and the moving contact 400, and the clamping arm 310 clamps the moving contact 400 stably and reliably through the protruding portion 3101, so as to ensure the short circuit resistance of the contact structure.
[0063] In the embodiment, the moving contact 400 is arranged between the two clamping arms 310. Figure 1 , Figures 3 to 5As shown, the movable contact 400 comprises a contact portion 410, and the movable contact portion 410 is provided with a movable contact point 420, which can be in contact with the fixed contact point 210. It can be understood that the movable contact 400 is in contact with the fixed contact point 210 through the movable contact point 420. When the movable contact 400 is separated from the clamping of the two clamping arms 310, the gap distance between the two protruding portions 3101 in the direction of the rotation axis of the movable contact 400 is greater than the width of the movable contact point 420. In this embodiment, during the process of inserting or separating the movable contact 400 between the two protruding portions 3101, the gap distance between the two protruding portions 3101 is greater than the width of the movable contact point 420, which effectively prevents the movable contact point 420 from contacting the two clamping arms 310, and is beneficial to the connection and disconnection of the contact structure.
[0064] Exemplarily, when the movable contact 400 is inserted between the two protruding portions 3101, the two clamping arms 310 can be expanded, and the two clamping arms 310 can be bent away from each other, so as to improve the stability of the clamping arms 310 clamping the movable contact 400 through the protruding portions 3101, and improve the short-circuit resistance of the contact structure.
[0065] Exemplarily, the movable contact point 420 can be welded on the contact portion 410.
[0066] Exemplarily, the contact portion 410 is arranged at the first end of the movable contact 400, and the second end of the movable contact 400 is rotationally connected with the base 100, which can improve the compactness of the contact structure.
[0067] Exemplarily, the contact portion 410 comprises a connecting surface 411 and two parallel contact surfaces 412. The connecting surface 411 is located between the two contact surfaces 412 in the direction of the rotation axis of the movable contact 400, and a transition surface 413 is arranged between the contact surface 412 and the connecting surface 411. The movable contact point 420 is arranged on the connecting surface 411, and the two clamping arms 310 are arranged one by one corresponding to the two contact surfaces 412, and the clamping arm 310 can abut against the corresponding contact surface 412. Specifically, the protruding portion 3101 abuts against the corresponding contact surface 412. When the movable contact 400 is separated from the clamping of the two clamping arms 310, the gap distance between the two protruding portions 3101 in the direction of the rotation axis of the movable contact 400 is less than the gap distance between the two contact surfaces 412. In this embodiment, the two clamping arms 310 can be expanded by the contact surface 412, which effectively improves the stability of the clamping arms 310 clamping the movable contact 400 through the protruding portions 3101, and improves the short-circuit resistance of the contact structure. In addition, the transition surface 413 is arranged to facilitate the insertion of the contact portion 410 between the two protruding portions 3101.
[0068] Exemplarily, the gap distance between the two protruding portions 3101 is greater than or equal to the width of the connecting surface 411 in the direction of the rotation axis of the moving contact 400, facilitating the insertion of the contact portion 410 between the two protruding portions 3101.
[0069] Exemplarily, the width of the connecting surface 411 is greater than or equal to the width of the moving contact 420.
[0070] Exemplarily, the transition surface 413 includes but is not limited to a chamfer surface or a concave arc surface, facilitating the insertion of the contact portion 410 between the two protruding portions 3101.
[0071] In the embodiment, as shown in Figure 2 , Figure 6 and Figure 7 , the base 100 has a positioning groove 110, and the clamping member 300 is arranged in the positioning groove 110, facilitating the positioning assembly of the clamping member 300 relative to the base 100.
[0072] Exemplarily, the positioning groove 110 can be a U-shaped groove.
[0073] Exemplarily, the side of the support plate 320 away from the stationary contact 200 can be attached to the groove bottom of the positioning groove 110, facilitating the positioning assembly of the clamping member 300 relative to the base 100.
[0074] In a feasible implementation, the positioning groove 110 includes two oppositely arranged groove side walls 111, and the two groove side walls 111 are arranged one-to-one corresponding to the two clamping arms 310. A first elastic member 500 is arranged between the corresponding groove side wall 111 and the clamping arm 310, and the first elastic member 500 is configured to provide a force for the clamping arm 310 to clamp the moving contact 400, so as to further improve the stability of the clamping arm 310 clamping the moving contact 400 through the protruding portion 3101, and improve the short circuit resistance of the contact structure.
[0075] Exemplarily, the first elastic member 500 can be a spring.
[0076] Exemplarily, the groove side wall 111 is provided with a first limiting groove 120, and a first end of the first elastic member 500 is arranged in the first limiting groove 120, facilitating the positioning assembly of the first elastic member 500 and improving the compactness of the contact structure.
[0077] Exemplarily, the clamping arm 310 is provided with a second limiting groove 3102, and a second end of the first elastic member 500 is arranged in the second limiting groove 3102, facilitating the positioning assembly of the first elastic member 500 and improving the compactness of the contact structure. In the embodiment, the second limiting groove 3102 and the protruding portion 3101 can be formed by stamping.
[0078] In the embodiment, as shown in Figure 2 andFigure 8 As shown, the contact structure further comprises a hinged frame 610, a first shaft 620, a second shaft 630 and a second elastic member 640, the hinged frame 610 and the movable contact 400 are rotatably connected with the base 100 through the first shaft 620, the movable contact 400 is provided with a long hole 401, the second shaft 630 is arranged through the hinged frame 610 and the long hole 401, the second elastic member 640 is arranged between the hinged frame 610 and the movable contact 400, and the second elastic member 640 makes the movable contact 400 always have a tendency of rotating towards the static contact 210. In the embodiment, the movable contact 400 is driven to rotate through the hinged frame 610, and then the on and off between the movable contact 400 and the static contact 210 is realized, and the second elastic member 640 can provide the movable contact 400 with a force of pressing towards the static contact 210, so as to ensure that the movable contact 420 and the static contact 200 can be reliably contacted.
[0079] Exemplarily, the second elastic member 640 can be a spring.
[0080] Exemplarily, the hinged frame 610 and the second shaft 630 can be fixedly connected or rotatably connected.
[0081] With reference to Figures 1 to 8 As shown, the embodiment further provides a switch, the switch comprises the contact structure, and the switch can simultaneously consider the off and short circuit resistance through the arrangement of the contact structure.
[0082] Specifically, the switch further comprises a swing rod 700 rotatably connected with the base 100 and a connecting rod 800 hingedly connected with the swing rod 700, and the connecting rod 800 is connected with the movable contact 400. In the embodiment, the swing rod 700 is rotated, the movable contact 400 can be driven to rotate through the connecting rod 800, and then the on and off between the movable contact 400 and the static contact 210 is realized, and the operation is facilitated. Exemplarily, the connecting rod 800 is hingedly connected with the hinged frame 610 through the second shaft 630, and under the action of the second elastic member 640, the connecting rod 800 can drive the movable contact 400 to rotate through the hinged frame 610.
[0083] Obviously, the above embodiments of the utility model are only for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A contact structure, characterized by, The utility model relates to a connector, which comprises: a base (100); a static contact (200) provided on the base (100), the static contact (200) being provided with a static contact point (210); a clamping piece (300) provided on the base (100), the clamping piece (300) comprising two oppositely arranged clamping arms (310); a dynamic contact (400) rotatably provided on the base (100), the dynamic contact (400) being clamped between the two clamping arms (310) and being in contact with the two clamping arms (310) and the static contact point (210).
2. The contact structure of claim 1, wherein The clamping piece (300) further comprises a support plate (320) connected to the clamping arms (310), and the side of the static contact (200) away from the static contact point (210) is attached to the support plate (320).
3. The contact structure of claim 2, wherein, The clamping arm (310) comprises a first plate (311), a second plate (312) and a third plate (313) that are sequentially bent, the first plate (311) is connected to the support plate (320), the second plate (312) is arranged in a direction close to the support plate (320) relative to the first plate (311), the third plate (313) is arranged in a direction opposite to the bending direction of the second plate (312) relative to the first plate (311), and the third plate (313) is used for clamping the dynamic contact (400).
4. The contact structure of claim 3, wherein, The clamping arm (310) further comprises a fourth plate (314) connected to the third plate (313), and the fourth plate (314) is arranged in a direction opposite to the bending direction of the third plate (313) relative to the second plate (312).
5. The contact structure of claim 1, wherein, The clamping arm (310) is provided with a protruding part (3101), and the protruding part (3101) is used for clamping the dynamic contact (400).
6. The contact structure of claim 5, wherein, The dynamic contact (400) comprises a contact part (410), the contact part (410) is provided with a dynamic contact point (420), and the dynamic contact point (420) can be in contact with the static contact point (210); When the dynamic contact (400) is separated from the clamping of the two clamping arms (310), the gap distance between the two protruding parts (3101) in the direction of the rotation axis of the dynamic contact (400) is greater than the width of the dynamic contact point (420).
7. The contact structure of claim 6, wherein, The contact part (410) comprises a connecting surface (411) and two mutually parallel contact surfaces (412); The connecting surface (411) is located between the two contact surfaces (412) in the direction of the rotation axis of the dynamic contact (400), and a transition surface (413) is arranged between the contact surface (412) and the connecting surface (411); The dynamic contact point (420) is arranged on the connecting surface (411); The two contact surfaces (412) are arranged in one-to-one correspondence with the two clamping arms (310), and the clamping arm (310) can abut against the corresponding contact surface (412). When the moving contact (400) is released from the clamping of the two clamping arms (310), the gap distance between the two protrusions (3101) in the direction of the rotation axis of the moving contact (400) is smaller than the gap distance between the two contact surfaces (412).
8. The contact structure according to any one of claims 1-7, characterized in that, The base (100) has a positioning groove (110), and the clamping piece (300) is arranged in the positioning groove (110).
9. The contact structure of claim 8, wherein, The positioning groove (110) comprises two oppositely arranged groove side walls (111), and the two groove side walls (111) are arranged in one-to-one correspondence with the two clamping arms (310). A first elastic member (500) is arranged between the corresponding groove side wall (111) and the clamping arm (310), and the first elastic member (500) is configured to provide a force for clamping the moving contact (400) by the clamping arm (310).
10. The contact structure of claim 9, wherein, A first limiting groove (120) is arranged on the groove side wall (111), and a first end of the first elastic member (500) is arranged in the first limiting groove (120). And / or, a second limiting groove (3102) is arranged on the clamping arm (310), and a second end of the first elastic member (500) is arranged in the second limiting groove (3102).
11. A switch, characterized by The contact structure comprises the contact structure according to any one of claims 1-10.