Direct-acting relay

Abstract

The utility model discloses a direct-acting relay, which comprises a base and a contact structure, the contact structure comprises a contact support, a moving contact part arranged on the contact support and a static contact part matched with the moving contact part, and the contact support is movably arranged in the base; and a guide structure is arranged between the contact support and the base so as to guide the movement of the contact support. According to the utility model, the guide structure is adopted to guide the contact support, so that the condition that one end of the contact support is upwarped in the actual movement process due to the deviation of the counterforce of each group of contacts is avoided, and the contact support is prevented from being scraped and clamped with the base in the movement process.

Description

Technical Field

[0001] The utility model relates to the field of direct-acting relays, in particular to a direct-acting relay. Background Art

[0002] The contact structure of a conventional direct-acting relay generally includes a contact support, a moving contact portion, and a stationary contact portion. The moving contact portion is mounted on the contact support and cooperates with the stationary contact portion. The moving contact portion and the contact support move in unison, closing or opening the moving contact on the moving contact portion and the stationary contact on the stationary contact portion. The contact support is typically moved by a push rod in the relay's magnetic circuit. However, conventional systems lack guidance for the movement of the contact support, failing to ensure stable movement and prone to scratching and jamming. Utility Model Content

[0003] The utility model aims at solving the technical problems existing in the prior art and provides a direct-acting relay capable of providing effective guidance for contact support.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a direct-acting relay, including a base and a contact structure, the contact structure including a contact support, a moving contact part mounted on the contact support, and a static contact part cooperating with the moving contact part, the contact support being movably arranged in the base; it is characterized in that: a guide structure is provided between the contact support and the base to guide the movement of the contact support.

[0005] Furthermore, the guide structure includes at least one group of guide column assemblies, which include guide columns and guide holes that are plugged into each other. The guide columns are arranged in one of the contact support and the base, and extend along the movement direction of the contact support. The guide holes are arranged in the other one of the contact support and the base.

[0006] Furthermore, the outer diameter of the guide post gradually increases from its tail end to its root, and / or the inner diameter of the guide hole gradually decreases from one end for inserting the guide post to the other end.

[0007] Furthermore, a reset spring is sheathed on the guide column, and two ends of the reset spring respectively press against the contact support and the base to drive the contact support to reset in the direction of disconnecting the moving contact part from the static contact part.

[0008] Furthermore, the guide column is arranged in the base, the guide hole is arranged in the contact support, the base is provided with a first limiting groove located outside the guide column, and the contact support is provided with a second limiting groove located outside the guide hole and connected to the guide hole, and the two ends of the reset spring are respectively inserted into the first limiting groove and the second limiting groove.

[0009] Furthermore, the guide post assemblies are provided in multiple groups, and the multiple groups of guide post assemblies are distributed along the length direction of the contact support, and two groups of the guide post assemblies are located at both ends of the contact support in its length direction.

[0010] Furthermore, the guide structure includes guide grooves respectively provided on two inner side surfaces of the base opposite to each other in the length direction of the contact support, and the two ends of the contact support in the length direction are respectively slidably fitted in the guide grooves on both sides of the base.

[0011] Furthermore, the moving contact part includes a moving contact bridge, and moving contacts are respectively provided at both ends of the moving contact bridge; the static contact part includes two static contacts, and the two static contacts are respectively provided with static contacts arranged opposite to the moving contacts at both ends of the moving contact bridge, and the two static contacts are respectively inserted into the base.

[0012] Furthermore, the moving contact bridge and the static contact part are respectively provided in plurality, and the plurality of moving contact bridges are arranged at intervals along the length direction of the contact support; the length direction of each moving contact bridge is respectively consistent with the width direction of the contact support; the plurality of static contact parts correspond one-to-one to the plurality of moving contact bridges; a contact spring is provided between the moving contact bridge and the contact support, and the contact spring is located on the side of the moving contact bridge facing away from the static contact.

[0013] Furthermore, it also includes a magnetic circuit part, which is located above the contact structure and is provided with a push rod, one end of which cooperates with the contact support to push the contact support to move, so that the moving contact part and the static contact part are closed or opened;

[0014] Furthermore, it also includes an outer shell and a middle cover, the middle cover is connected to the base and covers the contact structure, the outer shell is connected to the base and / or the middle cover and encloses a magnetic circuit cavity, and the magnetic circuit part is arranged in the magnetic circuit cavity.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The utility model is provided with a guide structure between the contact support and the base, which can guide the movement of the contact support, make the contact support movement more stable, avoid the contact support from scratching and getting stuck with the base during movement, thereby improving the reliability of the product movement.

[0017] 2. The guide structure preferably includes guide columns and guide holes that are plugged into each other, which can provide four-sided limiting and guiding for the contact support, greatly improving the guiding accuracy of the contact support and avoiding the situation where one end of the contact support is tilted up during actual movement due to the reaction force deviation at both ends of the contact support.

[0018] 3. The outer diameter of the guide post gradually increases from its tail end to its root end, and / or the inner diameter of the guide hole gradually decreases from one end for inserting the guide post to the other end. This not only makes it easier to insert the guide post into the guide hole during installation, but also makes the fitting clearance between the guide post and the guide hole smaller and smaller as the contact support moves along the direction in which the guide post extends into the guide hole, thereby further improving the guiding accuracy of the guide post assembly for the contact support.

[0019] 4. The present invention further includes a reset spring, which is directly sleeved on the outside of the guide column, so that the present invention does not need to provide an additional mounting column for the reset spring.

[0020] 5. The guide structure further includes the guide slot, which can provide guidance for the installation of the contact support and the guide column, and provide rough positioning for the movement of the contact support.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the direct-acting relay of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an exploded schematic diagram of the utility model;

[0023] Figure 2 This is a schematic diagram of the decomposition of the base and contact support of the utility model Figure 1 ;

[0024] Figure 3 This is a schematic diagram of the decomposition of the base and contact support of the utility model Figure 2 ;

[0025] Figure 4 It is a top view of the base and contact structure of the utility model in the assembled state;

[0026] Figure 5 yes Figure 4 AA cross-sectional view;

[0027] Figure 6 yes Figure 5 An enlarged schematic diagram of part B;

[0028] Figure 7 It is a cross-sectional view of the utility model;

[0029] In the figure: 1. Contact support; 11. Guide hole; 12. Second limiting groove; 13. Mounting groove; 2. Moving contact bridge; 21. Moving contact; 3. Static contact; 31. Static contact; 4. Contact spring; 5. Base; 51. Guide column; 52. First limiting groove; 53. Guide slide; 6. Return spring; 7. Magnetic circuit part; 71. Moving iron core; 72. Push rod; 8. Middle cover; 9. Outer shell. DETAILED DESCRIPTION

[0030] In the present invention, the terms "first", "second", etc. are only used to distinguish similar objects, rather than to describe a specific order or precedence, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "multiple" refers to two or more; "multiple groups" refers to two or more groups. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0031] See Figure 1-Figure 7 As shown, a direct-acting relay of the present invention comprises a base 5 and a contact structure. The contact structure comprises a contact support 1, a movable contact portion mounted on the contact support 1, and a stationary contact portion mating with the movable contact portion. Specifically, the movable contact portion comprises a movable contact bridge 2, and the stationary contact portion comprises two stationary contacts 3, each of which is provided with a stationary contact 31 that mates with the movable contacts 21 provided at each end of the movable contact bridge 2. The contact support 1 is movably disposed within the base 5, and a guide structure is provided between the contact support 1 and the base 5 to guide the movement of the contact support 1.

[0032] As a preferred embodiment, the guide structure includes at least one guide post assembly, which includes guide posts and guide holes that plug into each other. The guide posts are provided in one of the contact support 1 and the base 5, and the guide holes are provided in the other of the contact support 1 and the base 5. Specifically, in this embodiment, the guide posts 51 are provided in the base 5, and the guide holes 11 are provided in the contact support 1. This makes the contact support 1 relatively simple in structure and lightweight, which helps to increase the movement speed of the contact support 1, and thus helps to increase the opening and closing speed of the movable contact 21 and the static contact 31.

[0033] In this embodiment, the outer diameter of the guide post 51 gradually increases from its tail end to its root end, while the inner diameter of the guide hole 11 gradually decreases from the end into which the guide post 51 is inserted to the other end. Specifically, the outer circumference of the guide post 51 is a conical surface with a narrow outer surface and a wide inner surface, while the inner circumference of the guide hole 11 is a conical surface with a wide outer surface and a narrow inner surface. This not only makes it easier for the guide post 51 to be inserted into the guide hole 11 during installation, but also reduces the clearance between the guide post 51 and the guide hole 11 as the contact support 1 moves in the direction in which the guide post 51 extends into the guide hole 11, thereby further improving the guiding accuracy of the guide structure for the contact support 1. In other embodiments, the outer diameter of the guide post 51 gradually increases from its tail end to its root end, and the guide hole 11 is a cylindrical hole, or the guide post 51 is cylindrical, and the inner diameter of the guide hole 11 gradually decreases from the end into which the guide post 51 is inserted to the other end. In this way, the above-mentioned effects can also be achieved.

[0034] In this embodiment, a return spring 6 is sheathed around the guide post 51. The two ends of the return spring 6 respectively abut against the contact support 1 and the base 5 to reset the contact support 1 in the direction in which the movable contact 21 is disconnected from the static contact 31. Specifically, the base 5 is provided with a first limiting groove 52 located on the periphery of the guide post 51, and the contact support 1 is provided with a second limiting groove 12 located on the periphery of and connected to the guide hole 11. The two ends of the return spring 6 are respectively inserted into the first limiting groove 52 and the second limiting groove 12.

[0035] In this embodiment, the contact support 1 is provided with a plurality of mounting slots 13 spaced apart along its length. Each mounting slot 13 extends through the width of the contact support 1. Multiple movable contact bridges 2 and multiple static contact portions are provided. The multiple movable contact bridges 2 are arranged along the length of the contact support 1, and the multiple movable contact bridges 2 are mounted one by one in the multiple mounting slots 13. The length of each movable contact bridge 2 aligns with the width of the contact support 1, and the multiple static contact portions correspond one by one to the multiple movable contact bridges 2. A contact spring 4 is provided between each movable contact bridge 2 and the contact support 1. The contact spring 4 is located within the mounting slot 13 and on the side of the movable contact bridge 2 facing away from the static contact 3 to achieve contact overtravel and closing pressure. The static contacts 3 are each inserted into the base 5.

[0036] The guide post assemblies are provided in multiple groups, and the multiple groups of guide post assemblies are distributed along the length direction of the contact support 1, and two groups of guide post assemblies are located at both ends of the length direction of the contact support 1. Specifically, in this embodiment, two groups of guide post assemblies are used as an example, but the present invention is not limited thereto.

[0037] In this embodiment, the guide structure also includes guide grooves 53 provided on two inner side surfaces of the base 5 opposite to each other in the longitudinal direction of the contact support 1. The two guide grooves 53 are arranged opposite to each other, and the two ends of the contact support 1 in its longitudinal direction are respectively slidably fitted in the guide grooves 53 on both sides of the base 5.

[0038] The present invention also includes a magnetic circuit portion 7, which is located above the contact structure and has a moving iron core 71. The moving iron core 71 is coaxially connected to a push rod 72. One end of the push rod 72 cooperates with the contact support 1 to push the contact support 1 to move, so that the moving contact 21 and the static contact 31 are closed or disconnected.

[0039] The present invention further includes a housing 9 and a middle cover 8. The middle cover 8 is connected to the base 5 and covers the contact structure. The housing 9 is connected to the base 5 and / or the middle cover 8 to form a magnetic circuit cavity, and the magnetic circuit portion 7 is disposed within the magnetic circuit cavity. Specifically, in this embodiment, the housing 9 is connected to the middle cover 8 to form a magnetic circuit cavity, and the housing 9 and the middle cover 8 are snap-fit ​​connected. Similarly, the middle cover 8 and the base 5 are also snap-fit ​​connected. However, the connection method between the housing 9 and the middle cover 8, and between the middle cover 8 and the base 5 is not limited to this.

[0040] The utility model is a direct-acting relay that utilizes the guide slots 53 on both sides of the base 5 to provide rough guidance and positioning for the contact support 1. The plug-in fit of the guide post 51 and the guide hole 11 provides four-sided positioning and guidance for the contact support 1. This prevents the contact support 1 from tilting upward at one end during actual movement due to deviation in the reaction force at both ends of the contact support 1, thereby preventing the contact support 1 from scraping and jamming with the base 5 during movement, thereby improving the reliability of the product's operation. In particular, as the contact support 1 moves downward, the clearance between the guide post 51 and the guide hole 11 becomes smaller and smaller, further improving the guidance accuracy of the guide post assembly for the contact support 1, which can further improve the reliability of the product's operation.

[0041] The direct-acting relay of the present invention has the same parts as those in the prior art (such as the structure and working principle of the magnetic circuit part 7) that are not involved or can be implemented by using the prior art.

[0042] The above embodiments are only used to further illustrate a direct-acting relay of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the technical solution of the present invention.

Claims

1. A direct-acting relay comprising a base and a contact structure, wherein the contact structure comprises a contact support, a movable contact portion mounted on the contact support, and a stationary contact portion cooperating with the movable contact portion; the contact support being movably disposed within the base; and characterized in that: A guide structure is provided between the contact support and the base to guide the movement of the contact support.

2. The direct-acting relay according to claim 1, characterized in that: The guide structure includes at least one group of guide column assemblies, which include guide columns and guide holes that are plugged into each other. The guide columns are arranged in one of the contact support and the base and extend along the movement direction of the contact support. The guide holes are arranged in the other one of the contact support and the base.

3. The direct-acting relay according to claim 2, characterized in that: The outer diameter of the guide post gradually increases from its tail end to its root end, and / or the inner diameter of the guide hole gradually decreases from one end for inserting the guide post to the other end.

4. The direct-acting relay according to claim 2, wherein: A reset spring is sheathed on the guide column, and two ends of the reset spring respectively press against the contact support and the base to drive the contact support to reset in the direction of disconnecting the moving contact part from the static contact part.

5. The direct-acting relay according to claim 4, characterized in that: The guide column is arranged in the base, the guide hole is arranged in the contact support, the base is provided with a first limiting groove located outside the guide column, and the contact support is provided with a second limiting groove located outside the guide hole and connected to the guide hole, and the two ends of the return spring are respectively inserted into the first limiting groove and the second limiting groove.

6. The direct-acting relay according to any one of claims 2 to 5, characterized in that: The guide post assemblies are provided in multiple groups, and the multiple groups of guide post assemblies are distributed along the length direction of the contact support, and two groups of the guide post assemblies are located at both ends of the contact support in the length direction.

7. The direct-acting relay according to any one of claims 1 to 5, characterized in that: The guide structure includes guide grooves respectively provided on two inner side surfaces of the base opposite to each other in the length direction of the contact support, and the two ends of the contact support in the length direction are respectively slidably fitted in the guide grooves on both sides of the base.

8. The direct-acting relay according to claim 1, characterized in that: The moving contact part includes a moving contact bridge, and moving contacts are respectively provided at both ends of the moving contact bridge; the static contact part includes two static contacts, and the two static contacts are respectively provided with static contacts arranged opposite to the moving contacts at both ends of the moving contact bridge, and the two static contacts are respectively inserted into the base.

9. The direct-acting relay according to claim 8, characterized in that: The moving contact bridge and the static contact part are respectively provided with a plurality, and the plurality of moving contact bridges are arranged at intervals along the length direction of the contact support; the length direction of each moving contact bridge is consistent with the width direction of the contact support; the plurality of static contact parts correspond one-to-one to the plurality of moving contact bridges; a contact spring is provided between the moving contact bridge and the contact support, and the contact spring is located on the side of the moving contact bridge facing away from the static contact.

10. The direct-acting relay according to claim 1, characterized in that: It also includes a magnetic circuit part, which is located above the contact structure and is provided with a push rod, one end of which cooperates with the contact support to push the contact support to move, so that the moving contact part and the static contact part are closed or opened; It also includes a shell and a middle cover, the middle cover is connected to the base and covers the contact structure, the shell is connected to the base and / or the middle cover and encloses a magnetic circuit cavity, and the magnetic circuit part is arranged in the magnetic circuit cavity.

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