Contact mechanism and electrical switching device

Abstract

The utility model relates to the technical field of low-voltage electric appliances, and particularly discloses a contact mechanism and an electrical switch device. According to the contact mechanism provided by the utility model, the two mounting blocks are arranged on the mounting seat, each mounting block is respectively provided with the positioning hole, the positioning blocks are arranged on the moving contacts, the positioning blocks are inserted into the positioning holes, the moving contacts are fixed on the mounting seat, and the two moving contacts are fixedly mounted in a staggered manner and do not interfere with each other, so that the contact mechanism is simple in mounting structure and convenient to use. The two moving contacts can be conveniently mounted and positioned by arranging the mounting seat, so that the mounting difficulty of the moving contacts is reduced, the assembly efficiency is improved, and the production cost is reduced; besides, the positioning holes also limit the positions of the moving contact in the length direction and the height direction of the moving contact, so that the deviation of the mounting positions of the moving contact in the two directions can be effectively avoided during mounting, the accuracy of the position of the moving contact is ensured, and the effective contact conduction of the moving contact and the static contact is further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a contact mechanism and an electrical switch device. Background Art

[0002] In the field of low-voltage electrical appliances, especially in electrical switch devices such as contactors and relays, there are contact mechanisms for controlling the on and off of circuits to protect electrical appliances and circuits.

[0003] In the prior art, there are more and more ways to use PLC to control the contact mechanism. However, since the voltage and current output by the PLC are both small, it is easy to cause the contact between the moving contact and the static contact of the contact mechanism to be unstable. In order to solve this problem, a double contact bridge structure is usually adopted. However, the contact mechanism with a double contact bridge structure has certain defects in the assembly of the moving contact and the fixation of the relative position of the moving contact and the static contact. During the movement of the moving contact, the relative position of the moving contact and the static contact may shift, which leads to the inability of the moving contact and the static contact to effectively contact, and thus the inability of the moving contact and the static contact to effectively conduct. Utility Model Content

[0004] The utility model aims to provide a contact mechanism and an electrical switch device, which improve the stability of the fixing of the moving contact and enable the moving contact and the stationary contact to be effectively contacted and conducted.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, a contact mechanism is provided, comprising a moving contact assembly, wherein the moving contact assembly comprises:

[0007] A moving contact, wherein two moving contacts are provided, and moving contact points are provided at both ends of each moving contact, and positioning blocks are protruded from opposite sides of the two moving contacts;

[0008] The mounting seat has two mounting blocks spaced apart on its surface, each of the mounting blocks is provided with a positioning hole, the two moving contacts are arranged on opposite sides of the mounting block, and the positioning blocks are inserted into the corresponding positioning holes.

[0009] As an optional technical solution for the above-mentioned contact mechanism, a limiting part is respectively provided at one end of the two mounting blocks which are opposite to each other, and both ends of the limiting part respectively extend toward both sides of the mounting block, and the two ends of the limiting part are respectively spaced apart from the mounting seat, and the moving contact is inserted between the limiting part and the mounting seat.

[0010] As an optional technical solution to the above-mentioned contact mechanism, the contact mechanism also includes a contact support, the mounting seat is slidably connected to the contact support along a first direction, a guide groove is provided on the contact support, the guide groove passes through along the first direction, the end of the mounting block protrudes from the surface of the moving contact, and the end of the mounting block and the limiting portion are slidably arranged in the corresponding guide groove along the first direction.

[0011] As an optional technical solution for the above-mentioned contact mechanism, the mounting seat is provided with a surface of the mounting block which is a convex arc surface, and the arc surface is symmetrically arranged relative to the center position between the two mounting blocks, the middle part of the moving contact is in contact with the surface of the mounting seat, and the two ends of the moving contact are arranged at an angle to the surface of the mounting seat.

[0012] As an optional technical solution of the above-mentioned contact mechanism, the contact mechanism also includes a contact support, and first sliding grooves are respectively provided on the opposite sides of the mounting seat. Two sliders are provided on the contact support, and the sliders are slidably connected to the first sliding grooves in a one-to-one correspondence, and the sliders extend along the first direction.

[0013] As an optional technical solution for the above-mentioned contact mechanism, a second slide groove is respectively provided on the side of each moving contact opposite to the positioning block, the second slide groove is arranged one-to-one with the first slide groove on the mounting seat, the slider is placed in the second slide groove, and the width of the second slide groove is greater than the width of the slider.

[0014] As an optional technical solution of the above-mentioned contact mechanism, two first protrusions are convexly provided on the side of the mounting seat, the two first protrusions are arranged at intervals, and the two first protrusions and the side of the mounting seat form the first sliding groove; and / or

[0015] Two second protrusions are convexly provided on the side surface of the moving contact, the two second protrusions are arranged at intervals, and the two second protrusions and the side surface of the moving contact form the second sliding groove.

[0016] As an optional technical solution for the above-mentioned contact mechanism, the contact mechanism also includes a contact support and an elastic member, the mounting seat is slidably connected to the contact support along a first direction, two limiting ribs are protruded on the surface of the mounting seat away from the mounting block, and a positioning boss is provided between the two limiting ribs, the elastic member extends along the first direction, and one end of the elastic member is sleeved on the positioning boss, and the other end of the elastic member abuts against the contact support.

[0017] As an optional technical solution of the above-mentioned contact mechanism, the contact mechanism also includes a static contact assembly, which is arranged corresponding to the moving contact assembly, and each of the static contact assemblies includes at least two static contacts, and the static contacts are arranged at both ends of the moving contact, and each of the static contacts is provided with a static contact corresponding to the moving contact.

[0018] In a second aspect, an electrical switch device is provided, comprising a housing and a contact mechanism as described above, wherein the contact mechanism is arranged in the housing.

[0019] Beneficial effects of the utility model:

[0020] The contact mechanism provided by the utility model has two mounting blocks on the mounting seat, each mounting block is respectively provided with a positioning hole, and a positioning block is provided on the moving contact, the positioning block is inserted into the positioning hole, and the moving contact is fixed on the mounting seat, and the two moving contacts are staggered and fixedly installed without interfering with each other, the mounting structure is simple, and the provision of the mounting seat also facilitates the installation and positioning of the two moving contacts, thereby reducing the installation difficulty of the moving contact, improving the assembly efficiency, and reducing the production cost; in addition, the positioning hole also limits the position of the moving contact in the length direction and the height direction of the moving contact, and during installation, it can effectively avoid deviations in the installation position of the moving contact in two directions, thereby ensuring the accuracy of the position of the moving contact, and further ensuring that the moving contact and the static contact can effectively contact and conduct. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an axonometric diagram of the moving contact assembly provided by an embodiment of the utility model from a first viewing angle;

[0022] Figure 2 is an exploded view of a moving contact assembly provided in an embodiment of the utility model;

[0023] Figure 3 is a cross-sectional view of a moving contact assembly provided by an embodiment of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the assembly of a moving contact assembly, a contact support and a stationary contact assembly provided by an embodiment of the utility model;

[0025] Figure 5 It is a cross-sectional view of the assembly of the moving contact assembly, the contact support and the stationary contact assembly provided by the embodiment of the utility model;

[0026] Figure 6 is an isometric view of a moving contact assembly provided by an embodiment of the utility model from a second viewing angle;

[0027] Figure 7 It is an isometric view of the mounting seat provided in the embodiment of the utility model;

[0028] Figure 8 is a side view of a mounting base provided by an embodiment of the utility model;

[0029] Fig. 9 It is a structural schematic diagram of a moving contact provided by an embodiment of the utility model;

[0030] Fig.10 It is a structural schematic diagram of a moving contact assembly and a contact support provided by an embodiment of the utility model;

[0031] Fig.11 It is a structural schematic diagram of the arc surface of the mounting seat provided in an embodiment of the utility model.

[0032] In the figure:

[0033] 1. Moving contact assembly; 2. Contact support; 3. Elastic part; 4. Static contact assembly;

[0034] 11. moving contact; 111. positioning block; 112. second slide groove; 113. second convex block; 12. moving contact; 13. mounting seat; 131. mounting block; 132. positioning hole; 133. limiting portion; 134. arc surface; 135. first slide groove; 136. first convex block; 137. limiting ridge; 138. positioning boss;

[0035] 21. guide groove; 22. slider; 23. mounting cavity;

[0036] 41. Stationary contact; 42. Stationary contact point. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] like Figures 1 to 3 As shown, this embodiment provides a contact mechanism, which includes a moving contact assembly 1, and the moving contact assembly 1 includes a moving contact 11 and a mounting seat 13. Two moving contacts 11 are provided, and moving contacts 12 are provided at both ends of each moving contact 11, and positioning blocks 111 are protruded on opposite sides of the two moving contacts 11. Two mounting blocks 131 are provided on the surface of the mounting seat 13, and each mounting block 131 is provided with a positioning hole 132. The two moving contacts 11 are arranged on opposite sides of the mounting block 131, and the positioning blocks 111 are inserted into the corresponding positioning holes 132.

[0042] The contact mechanism provided in the present embodiment has two mounting blocks 131 on the mounting seat 13, each mounting block 131 is respectively provided with a positioning hole 132, and a positioning block 111 is provided on the moving contact 11, and the positioning block 111 is inserted into the positioning hole 132 to fix the moving contact 11 on the mounting seat 13, and the two moving contacts 11 are staggered and fixedly installed without interfering with each other, and the mounting structure is simple. The provision of the mounting seat 13 also facilitates the installation and positioning of the two moving contacts 11, reduces the installation difficulty of the moving contact 11, improves the assembly efficiency, and reduces the production cost; in addition, the positioning hole 132 also defines the position of the moving contact 11 in the length direction and the height direction of the moving contact 11. During installation, the deviation of the installation position of the moving contact 11 in two directions can be effectively avoided, thereby ensuring the accuracy of the position of the moving contact 12, and further ensuring that the moving contact 12 and the static contact 42 can be effectively contacted and conducted.

[0043] Reference Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the contact mechanism further includes a static contact assembly 4, which is arranged corresponding to the moving contact assembly 1. Usually, at least two groups of the moving contact assembly 1 are arranged, and at least two groups of the static contact assembly 4 are also arranged. Each static contact assembly 4 includes at least two static contacts 41, and at least one static contact 41 is arranged at each end of the moving contact 11. Each static contact 41 is provided with a static contact 42 corresponding to the moving contact 12, and the moving contact 12 can be attracted or separated with the static contact 42.

[0044] In some embodiments, a limiting portion 133 is provided at one end of the two mounting blocks 131 that are away from each other, and the two ends of the limiting portion 133 extend toward the two sides of the mounting block 131, that is, the limiting portion 133 and the mounting block 131 form a T-shaped structure. The two ends of the limiting portion 133 are respectively arranged at intervals from the mounting seat 13, and the moving contact 11 is inserted between the limiting portion 133 and the mounting seat 13. The set limiting portion 133 further limits the position of the moving contact 11 in the height direction to prevent the moving contact 11 from flipping sideways, and along the length direction of the moving contact 11, each moving contact 11 has two corresponding limiting portions 133, that is, the two ends of the moving contact 11 are limited and fixed, thereby improving the stability of fixing the moving contact 11. Optionally, the two limiting portions 133 corresponding to each moving contact 11 are symmetrically arranged relative to the center position of the moving contact 11, and the pressure applied to the moving contact 11 is uniform, thereby improving the stability of the contact between the moving contact 12 and the static contact 42.

[0045] The contact mechanism also includes a contact support 2, and a mounting seat 13 is mounted on the contact support 2. The contact support 2 can move along the direction of the moving contact 12 and the static contact 42 to attract or separate, thereby driving the moving contact 12 on the moving contact 11 to attract or separate from the static contact 42. The moving contact 11 will also have a certain displacement relative to the contact support 2 to ensure that the moving contact 12 and the static contact 42 can be stably in contact, and at the moment when the moving contact 12 and the static contact 42 are in contact, the moving contact 11 has a certain buffer to prevent the impact force of the moving contact 12 from damaging the static contact 42 when the moving contact 12 and the static contact 42 are attracted. In some feasible embodiments, the mounting seat 13 is slidably connected to the contact support 2 along a first direction, an elastic member 3 is provided between the mounting seat 13 and the contact support 2, the elastic member 3 extends along the first direction, and the elastic member 3 is configured to make the mounting seat 13 have a tendency to move toward the static contact 42, thereby ensuring that the moving contact 12 and the static contact 42 can be in stable contact, and when the moving contact 12 and the static contact 42 are attracted, the moving contact 11 has a reverse buffering force to prevent the moving contact 12 from damaging the static contact 42.

[0046] like Figure 5 , Figure 6 and Figure 7As shown, optionally, two limiting ribs 137 are convexly arranged on the surface of the mounting seat 13 away from the mounting block 131, and a positioning boss 138 is arranged between the two limiting ribs 137. The elastic member 3 extends along the first direction, and one end of the elastic member 3 is sleeved on the positioning boss 138, and the other end of the elastic member 3 abuts on the contact support 2. The limiting ribs 137 and the positioning boss 138 play a positioning role in the installation of the elastic member 3, which can effectively prevent the elastic member 3 from tipping over, and improve the stability of the installation of the elastic member 3. When the elastic member 3 is sleeved on the positioning boss 138, the elastic member 3 and the limiting rib 137 can be arranged in contact, or the elastic member 3 and the limiting rib 137 can be spaced apart, but the spacing between the elastic member 3 and the limiting rib 137 can effectively prevent the positioning boss 138 from popping out when the elastic member 3 is bent. The elastic member 3 can be a spring, which is not specifically limited here.

[0047] Combination Figure 6 , Figure 8 and Fig. 9 As shown, first slide grooves 135 are respectively provided on the opposite sides of the mounting seat 13, and two sliders 22 are provided on the contact support 2. The sliders 22 are slidingly connected with the first slide grooves 135 in a one-to-one correspondence. The sliders 22 extend along the first direction, and the mounting seat 13 slides along the first direction, thereby realizing the sliding connection between the mounting seat 13 and the contact support 2. The connection structure is simple and easy to implement.

[0048] Further optionally, a second slide groove 112 is respectively provided on the side opposite to the positioning block 111 of each moving contact 11, and the second slide groove 112 is arranged in a one-to-one correspondence with the first slide groove 135 on the mounting seat 13, and the slider 22 is placed in the second slide groove 112, and the width of the second slide groove 112 is greater than the width of the slider 22. The setting of the second slide groove 112 plays a guiding role in the movement of the moving contact 11, and improves the stability of the movement of the moving contact 11. In addition, the second slide groove 112 does not directly contact the slider 22, so as to avoid the moving contact 11 from being worn when the moving contact assembly 1 is in motion, extend the service life of the moving contact 11, and ensure the balance of the movement of the moving contact 11.

[0049] Optionally, the material of the mounting seat 13 is the same as or similar to that of the contact support 2, so that the side wall of the first slide groove 135 is in direct contact with the slider 22, which reduces the wear of the mounting seat 13 while achieving the installation of the mounting seat 13 on the contact support 2, so as to ensure the stability of the movement of the moving contact 11.

[0050] Two first protrusions 136 are convexly provided on the side of the mounting seat 13. The two first protrusions 136 are arranged at intervals, and the two first protrusions 136 and the side of the mounting seat 13 form a first slide groove 135. The structure is simple and easy to process. The first protrusions 136 can be formed when the mounting seat 13 is formed.

[0051] Two second protrusions 113 are convexly provided on the side of the moving contact 11. The two second protrusions 113 are arranged at intervals, and the two second protrusions 113 and the side of the moving contact 11 form a second slide groove 112. The structure is simple and easy to process. The second protrusions 113 can be formed at the same time as the moving contact 11 is formed.

[0052] Combination Figure 4 and Fig.10 As shown, the contact support 2 is provided with a mounting cavity 23, which is set through and has a rectangular cross section. The mounting seat 13 is provided with a first slide groove 135 on two opposite sides, and the mounting block 131 is arranged near the other two opposite sides of the mounting seat 13, and the two ends of the moving contact 11 are provided with the mounting cavity 23. Since the end of the mounting block 131 protrudes from the surface of the moving contact 11, the end of the mounting block 131 and the limiting portion 133 are slidably arranged in the corresponding guide groove 21 along the first direction, which plays a role in limiting the other two opposite sides of the mounting seat 13. When the mounting seat 13 moves, the circumferential force of the mounting seat 13 is uniform, so that the movement of the mounting seat 13 on the contact support 2 is smoother and there is no jamming.

[0053] like Fig.11 As shown, in some embodiments, the mounting seat 13 is provided with a mounting block 131 whose surface is a convex arc surface 134, and the arc surface 134 is symmetrically arranged relative to the center position between the two mounting blocks 131, the middle part of the moving contact 11 is in contact with the surface of the mounting seat 13, and the two ends of the moving contact 11 are arranged at an angle α to the surface of the mounting seat 13, so as to elastically reduce the force of the moving contact 11 being impacted, reduce the bounce amplitude of the moving contact 11, improve the reliability of the contact between the moving contact 12 and the static contact 42, and thereby improve the service life of the moving contact 11.

[0054] This embodiment also provides an electrical switch device, including a housing and the above-mentioned contact mechanism, wherein the contact mechanism is arranged in the housing. The electrical switch device can be a contactor, a relay, etc., which is not specifically limited here.

[0055] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. 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 scope of protection of the claims of the present invention.

Claims

1. A contact mechanism, characterized in that: The invention comprises a moving contact assembly (1), wherein the moving contact assembly (1) comprises: A moving contact (11), wherein two moving contacts (11) are provided, and moving contact points (12) are provided at both ends of each moving contact (11), and positioning blocks (111) are protrudingly provided on opposite sides of the two moving contacts (11); A mounting seat (13), wherein two mounting blocks (131) are arranged at intervals on the surface of the mounting seat (13), each mounting block (131) is provided with a positioning hole (132), the two moving contacts (11) are arranged on opposite sides of the mounting block (131), and the positioning blocks (111) are inserted into the corresponding positioning holes (132).

2. The contact mechanism according to claim 1, characterized in that: A limiting portion (133) is respectively provided at one end of the two mounting blocks (131) which are separated from each other, and two ends of the limiting portion (133) respectively extend toward two sides of the mounting block (131), and the two ends of the limiting portion (133) are respectively spaced apart from the mounting seat (13), and the moving contact (11) is inserted between the limiting portion (133) and the mounting seat (13).

3. The contact mechanism according to claim 2, characterized in that: The contact mechanism also includes a contact support (2), the mounting seat (13) is slidably connected to the contact support (2) along a first direction, a guide groove (21) is provided on the contact support (2), the guide groove (21) is through-connected along the first direction, the end of the mounting block (131) is protruding from the surface of the moving contact (11), and the end of the mounting block (131) and the limiting portion (133) are slidably arranged in the corresponding guide groove (21) along the first direction.

4. The contact mechanism according to claim 1, characterized in that: The mounting seat (13) is provided with a convex arc surface (134) on the surface of the mounting block (131), and the arc surface (134) is symmetrically arranged relative to the center position between the two mounting blocks (131), the middle part of the moving contact (11) is in contact with the surface of the mounting seat (13), and the two ends of the moving contact (11) are arranged at an angle to the surface of the mounting seat (13).

5. The contact mechanism according to claim 1, characterized in that: The contact mechanism also includes a contact support (2), first slide grooves (135) are respectively provided on two opposite sides of the mounting seat (13), and two sliders (22) are provided on the contact support (2), the sliders (22) are slidably connected to the first slide grooves (135) in a one-to-one correspondence, and the sliders (22) extend along a first direction.

6. The contact mechanism according to claim 5, characterized in that: A second slide groove (112) is provided on a side of each of the moving contacts (11) opposite to the positioning block (111), the second slide groove (112) being arranged in one-to-one correspondence with the first slide groove (135) on the mounting seat (13), the slider (22) being placed in the second slide groove (112), and the width of the second slide groove (112) being greater than the width of the slider (22).

7. The contact mechanism according to claim 6, characterized in that: Two first protrusions (136) are convexly provided on the side surface of the mounting seat (13), the two first protrusions (136) are arranged at intervals, and the two first protrusions (136) and the side surface of the mounting seat (13) form the first sliding groove (135); and / or Two second protrusions (113) are convexly provided on the side surface of the moving contact (11), the two second protrusions (113) are arranged at intervals, and the two second protrusions (113) and the side surface of the moving contact (11) form the second sliding groove (112).

8. The contact mechanism according to claim 1, characterized in that: The contact mechanism also includes a contact support (2) and an elastic member (3); the mounting seat (13) is slidably connected to the contact support (2) along a first direction; two limiting ribs (137) are spaced apart from each other on a surface of the mounting seat (13) away from the mounting block (131); a positioning boss (138) is provided between the two limiting ribs (137); the elastic member (3) extends along the first direction, and one end of the elastic member (3) is sleeved on the positioning boss (138), and the other end of the elastic member (3) abuts against the contact support (2).

9. The contact mechanism according to claim 1, characterized in that: The contact mechanism further comprises a stationary contact assembly (4), wherein the stationary contact assembly (4) is arranged corresponding to the moving contact assembly (1), each of the stationary contact assemblies (4) comprises at least two stationary contacts (41), the stationary contacts (41) are arranged at both ends of the moving contact (11), and each of the stationary contacts (41) is provided with a stationary contact (42) corresponding to the moving contact (12).

10. An electrical switch device, characterized in that The invention comprises a housing and the contact mechanism according to any one of claims 1 to 9, wherein the contact mechanism is arranged in the housing.

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