Contact structure and contactor
By designing a contact structure with multiple grooves on the surface of the static contact and a convex rib on the surface of the static contact is convex and a convex rib on the surface of the static contact, the problem of unreliable connection caused by foreign matter sticking when the contact point of the dynamic contact is contacted, and a stable and reliable communication and self-cleaning function is achieved.
Patent Information
- Application Number
- CN202420811485.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-18
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-04-18
AI Technical Summary
The point contact structure of existing dynamic and static contacts may cause unreliable connection when foreign objects are stuck.
A contact structure is designed, in which a plurality of grooves are provided on the surface of the static contact, and at least one convex rib is provided on the surface of the movable contact, and the convex ribs are arranged intersectingly to ensure that foreign matter can be slid into the groove.
Through this structure, stable and reliable communication of dynamic and static contacts is achieved, unreliable connection problems caused by foreign matter adhesion are avoided, and self-cleaning function is provided.
Smart Images
Figure CN222705394U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a contact structure and a contactor. Background Art
[0002] The contact structure is an important component of switching electrical appliances such as contactors. The contact structure usually includes a moving contact and a stationary contact that are relatively arranged. The connection and disconnection of the circuit are achieved through the contact and separation of the moving contact and the stationary contact.
[0003] The abutting surface of the existing moving contact is a spherical surface, and the abutting surface of the static contact is a plane. The moving and static contacts are in point contact. When foreign matter adheres to the contact surface of the moving contact, unreliable connection may occur.
[0004] Therefore, there is an urgent need for a contact structure to solve the above problems. Utility Model Content
[0005] The utility model aims to provide a contact structure and a contactor to solve the problem that the moving and static contacts in the related art are point contacts, and when foreign matter adheres to the contact surface of the moving contact, unreliable connection may occur.
[0006] On the one hand, the utility model provides a contact structure, which includes:
[0007] A stationary contact, wherein a plurality of grooves are concavely formed on the surface of the stationary contact;
[0008] A moving contact, wherein at least one convex rib is protruding from the surface of the moving contact, the convex rib is used to contact the surface of the stationary contact, and the convex rib is arranged corresponding to at least one of the grooves, and the extension direction of the groove corresponding to the convex rib is arranged crosswise with the extension direction of the convex rib.
[0009] As a preferred technical solution of the contact structure, at least one side wall of the convex rib along the extension direction of the convex rib is an inclined surface or a curved surface.
[0010] As a preferred technical solution of the contact structure, the ratio of the area of a single convex rib projected on the surface of the moving contact to the area of the surface of the moving contact provided with the convex rib is a, and a≥40%.
[0011] As a preferred technical solution of the contact structure, a plurality of the grooves are arranged in parallel and at intervals on the surface of the stationary contact, and the extending direction of each of the grooves is arranged to intersect with the extending direction of the convex rib.
[0012] As a preferred technical solution of the contact structure, the extending direction of the groove is perpendicular to the extending direction of the rib.
[0013] As a preferred technical solution of the contact structure, the plurality of grooves are arranged in a mesh structure.
[0014] As a preferred technical solution of the contact structure, the ratio of the total area of the plurality of grooves to the area of the surface of the stationary contact provided with the grooves is b, and b≥50%.
[0015] As a preferred technical solution of the contact structure, the convex rib and each of the grooves are arranged crosswise.
[0016] As a preferred technical solution of the contact structure, the plurality of grooves are arranged in concentric circles.
[0017] On the other hand, the utility model provides a contactor, including a moving contact bridge, a shell and a contact structure in any of the above schemes, wherein moving contacts are respectively provided at both ends of the moving contact bridge, and the static contacts corresponding to the moving contacts are provided in the shell.
[0018] The beneficial effects of the utility model are:
[0019] The utility model provides a contact structure and a contactor, the contactor includes a moving contact bridge, a shell and a contact structure, the contact structure includes two stationary contacts and two moving contacts, the two stationary contacts are fixedly arranged in the shell at intervals, the two moving contacts are fixedly arranged at both ends of the moving contact bridge, and the two moving contacts are respectively opposite to the two stationary contacts, the moving contact bridge is slidably arranged in the shell and can drive the moving contact to move in a direction close to or away from the corresponding stationary contact. The stationary contact is used to abut against the moving contact on a contact surface with a plurality of grooves; the moving contact is used to be provided with at least one convex rib on a surface directly opposite to the abutment surface, the convex rib abuts against the abutment surface, so that the convex rib is arranged corresponding to at least one groove, and the extension direction of the groove arranged corresponding to the convex rib is arranged crosswise with the extension direction of the convex rib. When the contactor provided with this contact structure is working, the moving contact bridge drives the two moving contacts to approach the corresponding two stationary contacts. When the two moving contacts abut against the corresponding two stationary contacts, the moving contact bridge will be deformed due to the force applied to the moving contact bridge itself, which will cause the stationary contacts and the corresponding moving contacts to slide relative to each other at the contact position. Since a plurality of grooves are concavely provided on the abutting surface of the stationary contact; the moving contact is provided with at least one convex rib on the surface opposite to the abutting surface, and the convex rib abuts against the abutting surface so that the convex rib is arranged corresponding to at least one groove. At this time, if there is dust or foreign matter at the position where the convex rib abuts against the abutting surface, the relative sliding of the stationary contact and the moving contact causes the dust or foreign matter at the position where the convex rib abuts against the abutting surface to enter the groove under the action of the convex rib, thereby ensuring that when the static contact and the moving contact abut, the static contact and the moving contact can be stably and reliably connected. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the structure of the contactor in the first embodiment of the utility model;
[0021] Figure 2 This is a schematic diagram of the structure of the moving contact and the moving contact bridge in the first embodiment of the utility model;
[0022] Figure 3 This is a schematic diagram of the structure of the static contact in the first embodiment of the utility model;
[0023] Figure 4 It is a schematic diagram of the structure of the static contact in the second embodiment of the utility model.
[0024] In the figure:
[0025] 1. Stationary contact; 11. Groove;
[0026] 2. Moving contact; 21. Convex rib;
[0027] 3. Dynamic touch bridge. DETAILED DESCRIPTION
[0028] 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.
[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0030] 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.
[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0032] Embodiment 1
[0033] like Figure 1 to Figure 3 As shown, this embodiment provides a contact structure and a contactor, the contactor includes a moving contact bridge 3, a housing and a contact structure, the contact structure includes two stationary contacts 1 and two moving contacts 2, the two stationary contacts 1 are fixedly arranged in the housing at intervals, the two moving contacts 2 are fixedly arranged at both ends of the moving contact bridge 3, and the two moving contacts 2 are respectively opposite to the two stationary contacts 1, the moving contact bridge 3 is slidably arranged in the housing and can drive the moving contact 2 to move in a direction close to or away from the corresponding stationary contact 1. The stationary contact 1 is used to have a plurality of grooves 11 concavely arranged on the abutting surface of the moving contact 2; the moving contact 2 is used to have at least one convex rib 21 convexly arranged on the surface directly opposite to the abutting surface, the convex rib 21 abuts against the abutting surface, so that the convex rib 21 is arranged corresponding to the at least one groove 11, and the extension direction of the at least one groove 11 directly opposite to the convex rib 21 is arranged crosswise with the extension direction of the convex rib 21. When the contactor provided with the contact structure is working, the moving contact bridge 3 drives the two moving contacts 2 to approach the corresponding two stationary contacts 1. When the two moving contacts 2 abut against the corresponding two stationary contacts 1, the two moving contacts 2 stop moving. Due to the force of the moving contact bridge 3 itself, the moving contact bridge 3 will deform, thereby causing the stationary contacts 1 and the corresponding moving contacts 2 to slide relative to each other at the contact position. Since a plurality of grooves 11 are concavely provided on the abutting surface of the stationary contact 1; the moving contact 2 is provided with at least one convex surface opposite to the abutting surface The convex rib 21 abuts against the abutting surface so that the convex rib 21 is arranged corresponding to at least one groove 11. At this time, if there is dust or foreign matter at the position where the convex rib 21 abuts against the abutting surface, the relative sliding of the static contact 1 and the moving contact 2 causes the dust or foreign matter at the abutting position of the convex rib 21 and the abutting surface to enter the groove 11 under the action of the convex rib 21, which is equivalent to the contact structure having a self-cleaning function, thereby ensuring that when the static contact 1 and the moving contact 2 abut, the static contact 1 and the moving contact 2 can be stably and reliably connected.
[0034] Optionally, at least one side wall of the rib 21 along the extension direction of the rib 21 is an inclined surface or an arc surface. In this embodiment, the above-mentioned setting makes the rib 21 and the abutting surface in line contact. Compared with surface contact, line contact can greatly reduce the abutting area. The small abutting area and high contact pressure can effectively avoid problems such as oxidation, ablation and contact point deformation, thereby ensuring the performance stability and life of the contactor. At the same time, the line contact method can also reduce the generation of arcs and noise during the high-frequency opening and closing process of the contactor, reduce vibration, and achieve a more stable control effect.
[0035] Optionally, the ratio of the area of a single rib 21 projected on the surface of the moving contact 2 to the area of the surface of the moving contact 2 provided with the rib 21 is a, and a ≥ 40%. In this embodiment, this arrangement ensures the structural strength of the rib 21 itself on the one hand, and on the other hand, since the static contact 1 and the moving contact 2 generate heat when they are connected, the rib 21 will be heated and softened, which is not conducive to the long-term stable use of the rib 21. This arrangement can improve the service life of the rib 21. Specifically, the diameter of the surface of the moving contact 2 provided with the rib 21 is Φ3.4mm~Φ3.6mm; the width of the rib 21 is 1.5mm~2mm, the height of the rib 21 is 0.2mm~0.4mm, and the length of the rib 21 can be set according to actual needs, such as 0.9mm~1.5mm.
[0036] Optionally, multiple grooves 11 are arranged in parallel and at intervals on the surface of the stationary contact 1, and the extending direction of each groove 11 is arranged to intersect with the extending direction of the convex rib 21. In this embodiment, this arrangement can make as many grooves 11 as possible be arranged on the abutting surface of the stationary contact 1, and similarly, the convex rib 21 can also be arranged corresponding to as many grooves 11 as possible. Specifically, the abutting surface diameter is Φ3.4mm~Φ3.6mm, the interval between every two stripes is 0.4mm~0.6mm, and the number of stripe grooves 11 is 5~6.
[0037] Preferably, the extending direction of the groove 11 is perpendicular to the extending direction of the rib 21. In this embodiment, the above arrangement realizes the perpendicularity between the rib 21 and the groove 11, so that the rib 21 is directly opposite to the grooves 11 at most.
[0038] Preferably, the rib 21 is arranged crosswise with each groove 11. In this embodiment, this arrangement further improves the dust removal effect of the groove 11 on the surface of the rib 21. It ensures that when the static contact 1 and the moving contact 2 are in contact, the static contact 1 and the moving contact 2 can be stably and reliably connected.
[0039] Embodiment 2
[0040] like Figure 4As shown, this embodiment is basically the same as the first embodiment, the only difference is the arrangement of the multiple grooves 11. Optionally, the multiple grooves 11 are arranged in a mesh structure. In this embodiment, this setting does not need to consider the extension direction of the rib 21. The rib 21 can take any direction within the abutment surface as the extension direction of the rib 21. Therefore, this setting improves the assembly efficiency. In other embodiments, the multiple grooves 11 can also be connected end to end and arranged in a serpentine shape, or the multiple grooves 11 can be arranged in concentric circles.
[0041] Optionally, the ratio of the total area of the plurality of grooves 11 to the area of the abutting surface is b, b≥50%. In this embodiment, this arrangement can ensure that the abutting surface has sufficient support strength for the rib 21 and can also ensure that the rib 21 can face more grooves 11.
[0042] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. 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 implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. A contact structure, characterized in that: include: A stationary contact (1), wherein a plurality of grooves (11) are concavely provided on the surface of the stationary contact (1); A moving contact (2), wherein at least one convex rib (21) is convexly provided on the surface of the moving contact (2), the convex rib (21) is used to contact the surface of the stationary contact (1), and the convex rib (21) is arranged corresponding to at least one of the grooves (11), and the extension direction of the groove (11) arranged corresponding to the convex rib (21) is arranged to intersect with the extension direction of the convex rib (21).
2. The contact structure according to claim 1, characterized in that: At least one side wall of the convex rib (21) along the extension direction of the convex rib (21) is an inclined surface or a curved surface.
3. The contact structure according to claim 1 or 2, characterized in that: The ratio of the area of a single convex rib (21) projected on the surface of the moving contact (2) to the area of the surface of the moving contact (2) provided with the convex rib (21) is a, and a≥40%.
4. The contact structure according to claim 1, characterized in that: A plurality of grooves (11) are arranged in parallel and at intervals on the surface of the stationary contact (1), and the extending direction of each groove (11) is arranged to intersect with the extending direction of the convex rib (21).
5. The contact structure according to claim 1, characterized in that: The extending direction of the groove (11) is perpendicular to the extending direction of the rib (21).
6. The contact structure according to claim 1, characterized in that: The plurality of grooves (11) are arranged in a mesh structure.
7. The contact structure according to claim 6, characterized in that: The ratio of the total area of the plurality of grooves (11) to the area of the surface of the stationary contact (1) on which the grooves (11) are provided is b, and b≥50%.
8. The contact structure according to claim 1, characterized in that: The convex rib (21) and each of the grooves (11) are arranged crosswise.
9. The contact structure according to claim 1, characterized in that: The plurality of grooves (11) are arranged in concentric circles.
10. A contactor, characterized in that It comprises a moving contact bridge (3), a shell and a contact structure according to any one of claims 1 to 9, wherein the moving contacts (2) are respectively arranged at both ends of the moving contact bridge (3), and the stationary contact (1) corresponding to the moving contact (2) is arranged in the shell.