Auxiliary contact structure of relay

Abstract

The utility model discloses an auxiliary contact structure of a relay, which comprises an auxiliary contact leading-out end, an auxiliary movable contact spring, a yoke plate and a ceramic cover arranged on the upper side of the yoke plate, a sealed driving cavity is formed between the ceramic cover and the yoke plate, and a push rod component is arranged in the driving cavity. A middle guide piece is arranged between each group of correspondingly arranged auxiliary contact leading-out ends and auxiliary movable reeds, and the auxiliary movable reeds are connected or disconnected with the auxiliary contact leading-out ends through the middle guide pieces under the driving of the push rod component; and the middle guide piece is arranged on the yoke plate through the insulating piece. According to the utility model, the middle guide piece is arranged between the auxiliary contact leading-out end and the auxiliary movable contact spring, and the middle guide piece is connected with the yoke iron plate through the insulating piece, so that the cost is low, the structure and the process are simple, in addition, the middle guide piece is stable in structure under the support of the insulating piece, and the reliability of the auxiliary contact structure is still kept after long-term use.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, and particularly relates to an auxiliary contact structure of a relay. Background Art

[0002] A relay is an electrical control device. When the change of the input quantity reaches the specified requirement, it is an electrical appliance that causes a predetermined step change in the controlled quantity in the electrical output circuit. The relay has an interaction relationship between the control system and the controlled system and is usually applied to an automatic control circuit. In fact, it is an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays roles such as automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] Generally, two sets of contacts are arranged in a relay. One set is the main contacts, which are fixed on the electromagnetic component to complete the on-off control of the main control circuit through the electromagnetic component. The other set is the auxiliary contacts. The auxiliary contacts act as an auxiliary logic switch for the circuit control function and act simultaneously with the main contacts. The switching capacity of the auxiliary contacts is smaller than that of the main contacts, and other logical operations that need to be completed when the relay operates can be realized by using the auxiliary contacts.

[0004] The auxiliary contacts are attached mechanical structures. For example, a connection structure between the auxiliary static contact lead-out end and the yoke iron plate of a DC relay disclosed in a Chinese utility model patent (CN212907567U) fixes the auxiliary static contact lead-out end assembly to the yoke iron plate by welding through a kovar alloy part. This method not only makes the auxiliary contact structure complex, but also has a high welding defect rate due to the complex welding process, resulting in an increase in production cost. Summary of the Invention

[0005] In order to overcome the above defects, the utility model provides an auxiliary contact structure of a relay with low cost, simple structure and process.

[0006] The technical solution adopted by the utility model to solve its technical problems is: to provide an auxiliary contact structure of a relay, including an auxiliary contact lead-out end, an auxiliary moving reed, a yoke iron plate, and a ceramic cover arranged on the upper side of the yoke iron plate. A sealed driving cavity is formed between the ceramic cover and the yoke iron plate. A push rod component is arranged in the driving cavity. Two auxiliary contact lead-out ends are arranged at the top wall of the ceramic cover and their bottom ends extend into the driving cavity. Two auxiliary moving reeds are arranged on the insulating base of the push rod component and correspond to the two auxiliary contact lead-out ends.

[0007] An intermediate guide is arranged between each set of corresponding auxiliary contact lead-out end and auxiliary moving reed. Driven by the push rod component, the auxiliary moving reed is connected or disconnected from the auxiliary contact lead-out end through the intermediate guide. The intermediate guide is arranged on the yoke iron plate through an insulating part.

[0008] As a further improvement of the present invention, the intermediate guide is made of conductive material, the insulating member is made of plastic material, and the intermediate guide and the insulating member are integrally formed by injection molding.

[0009] As a further improvement of the present invention, the intermediate guide comprises a first end connected to the auxiliary contact lead-out terminal, and a second end provided on the insulating member and corresponding to the auxiliary movable spring.

[0010] As a further improvement of the utility model, the first end is provided with a plug hole for inserting the bottom end of the auxiliary contact lead-out end; the upper surface of the second end is provided with a contact for contacting the auxiliary movable spring.

[0011] As a further improvement of the present invention, a plurality of convex ribs are arranged at intervals on the inner peripheral wall of the plug hole, and the plurality of convex ribs are respectively arranged toward the axis of the plug hole and inclined downward.

[0012] As a further improvement of the present invention, the intermediate guide is in a "]"-shaped structure, the first end and the second end are two horizontal sections arranged vertically and parallelly, and the two horizontal sections are connected by a vertical section.

[0013] As a further improvement of the utility model, the lower end of the insulating part is connected to the yoke iron plate, and the upper end is provided with two horizontally arranged embedding grooves and two fixing seats vertically arranged at one end of the embedding grooves. The second end of the intermediate guide is arranged on the embedding groove, and the vertical section is arranged in the fixing seat.

[0014] As a further improvement of the present invention, the auxiliary movable spring is a conductive metal sheet with elastic deformation capability, and is integrally formed with the insulating base of the push rod component by an injection molding process.

[0015] As a further improvement of the present invention, the auxiliary movable spring includes a deformation portion and a contact portion, the deformation portion is a U-shaped structure with an opening facing downward, one end of which is fixedly connected to the insulating base, and the contact portion is horizontally arranged directly above the second end of the intermediate guide and is connected to the other end of the deformation portion through an arc portion.

[0016] As a further improvement of the present invention, the insulating member is a square member, wherein a avoidance hole is provided in the middle thereof for avoiding the push rod component, and positioning holes are respectively provided at the four corners, and a boss corresponding to the positioning hole is provided on the yoke iron plate, and the boss is interference fit with the positioning hole.

[0017] The beneficial effects of the present utility model are as follows: By arranging an intermediate guide between the auxiliary contact lead-out end and the auxiliary moving reed, and connecting the intermediate guide to the yoke iron plate through an insulating member, the cost is low, the structure and process are simple. In addition, the intermediate guide is structurally stable under the support of the insulating member, ensuring the reliability of the auxiliary contact structure under long-term use. Brief Description of the Drawings

[0018] Figure 1 It is a schematic exploded view showing the structure of the auxiliary contact structure of the present utility model;

[0019] Figure 2 It is a schematic exploded view of a relay applying the auxiliary contact structure of the present utility model;

[0020] Figure 3 For the present utility model Figure 2 Schematic cross-sectional structure diagram of the relay;

[0021] Figure 4 For the present utility model Figure 3 Enlarged schematic view at position A.

[0022] In combination with the drawings, the following description is made:

[0023] 1. Auxiliary contact lead-out end; 2. Auxiliary moving reed; 21. Deformed part; 22. Contact part; 23. Arc part; 3. Yoke iron plate; 31. Boss; 4. Ceramic cover; 5. Driving cavity; 6. Pushing rod component; 7. Intermediate guide; 71. First end; 711. Insertion hole; 7111. Rib; 72. Second end; 721. Contact point; 73. Vertical section; 8. Insulating member; 81. Embedded groove; 82. Fixed seat; 83. Avoidance hole; 84. Positioning hole. Detailed Embodiment

[0024] The following is a detailed description of a preferred embodiment of the present utility model in combination with the drawings.

[0025] Refer to Figures 1 to 4 , a relay auxiliary contact structure provided by the present utility model. It should be noted that for other structures of the relay, they are the same as those in the prior art and will not be elaborated in this application.

[0026] Specifically, the auxiliary contact structure includes an auxiliary contact lead-out terminal 1, an auxiliary moving reed 2, a yoke iron plate 3, and a ceramic cover 4 provided on the upper side of the yoke iron plate 3. A sealed driving cavity 5 is formed between the ceramic cover 4 and the yoke iron plate 3. A push rod component 6 is provided in the driving cavity 5. Among them, two auxiliary contact lead-out terminals 1 are provided on the top wall of the ceramic cover 4 and their bottom ends extend into the driving cavity 5. Two auxiliary moving reeds 2 are provided on the insulating base 61 of the push rod component 6 and correspond to the two auxiliary contact lead-out terminals 1. An intermediate guide 7 is provided between each set of corresponding auxiliary contact lead-out terminals 1 and auxiliary moving reeds 2. Driven by the push rod component 6, the auxiliary moving reed 2 is connected or disconnected from the auxiliary contact lead-out terminal 1 through the intermediate guide 7. The intermediate guide 7 is provided on the yoke iron plate 3 through an insulating member 8, that is, the intermediate guide 7 is insulated from the yoke iron plate 3. It can be understood that this application describes a set of auxiliary contact structures. Of course, according to the usage requirements, multiple sets of auxiliary contact structures can be provided.

[0027] In addition, the intermediate guide 7 is made of copper, the insulating member 8 is made of PA66 or PA6T, and the intermediate guide 7 and the insulating member 8 are integrally formed by an injection molding process, that is, using the traditional plastic coating process, the intermediate guide 7 and the insulating member 8 are made into an integral structure, which is convenient for the installation and fixation of the intermediate guide 7, and at the same time prevents the intermediate guide 7 from conducting with components other than the auxiliary contact lead-out terminal 1 and the auxiliary moving reed 2, ensuring the reliability of the auxiliary contact structure.

[0028] Furthermore, the intermediate guide 7 is a sheet-like structure in the shape of "]". The two horizontally arranged segments parallel to each other up and down are the first end 71 and the second end 72 respectively, and the two horizontally arranged segments are connected by a vertical segment 73.

[0029] Among them, a plug hole 711 for inserting the bottom end of the auxiliary contact lead-out terminal 1 is provided on the first end 71, so that the auxiliary contact lead-out terminal 1 is connected to the intermediate guide 7. In addition, a plurality of ribs 7111 are arranged at intervals on the inner peripheral wall of the plug hole 711, and the plurality of ribs 7111 are respectively inclined downward toward the axis of the plug hole 711. That is, the ribs 7111 are inclined from the inner peripheral wall of the plug hole 711 toward the central axis of the auxiliary contact lead-out terminal 1 and toward its bottom end, so as to ensure the effective connection between the bottom end of the auxiliary contact lead-out terminal 1 and the intermediate guide 7 and prevent the connection looseness from affecting the reliability of the connection.

[0030] In addition, the second end 72 of the intermediate guide 7 is provided on the insulating member 8 and is directly below the contact end of the auxiliary moving reed 2. A contact point 721 for contacting the auxiliary moving reed 2 is provided on the upper surface of the second end 72. The contact point 721 is made of composite copper or silver-copper alloy material to improve the conductivity between the contact point 721 and the auxiliary moving reed 2. The contact point 721 is connected to the second end 72 of the intermediate guide 7 by riveting. The vertical section 73 is used to stably fix the intermediate guide 7 in a "]" state to the yoke iron plate 3 through the insulating member 8.

[0031] Furthermore, the lower end of the insulating member 8 is connected to the yoke iron plate 3, and two horizontally arranged grooves 81 and two fixing seats 82 vertically upwardly arranged at one end of the groove 81 are provided at the upper end. The second end 72 of the intermediate guide 7 is provided in the groove 81, and the vertical section 73 is provided in the fixing seat 82. It can be understood that on the premise that the first end 71 and the second end 72 of the intermediate guide 7 can be respectively connected to the auxiliary contact lead-out end 1 and the contact end of the auxiliary moving reed 2, the insulating member 8 can be a "』"-shaped structure, the lower end in the horizontal direction is connected to the yoke iron plate 3, the upper end supports the second end 72 of the intermediate guide 7, and the contact point 721 of the second end 72 is exposed to its upper surface; similarly, the insulating member 8 can also be a structure with the same characteristics as the intermediate guide 7.

[0032] Refer to Figure 1 , the insulating member 8 provided in this application is a square member visually as a whole. An avoidance hole 83 for avoiding the push rod member 6 is provided in the middle, and positioning holes 84 are respectively provided at the four corners. A boss 31 corresponding to the positioning hole 84 is provided on the yoke iron plate 3. The boss 31 and the positioning hole 84 are in interference fit to stably fix the insulating member 8 on the yoke iron plate 3. In addition, when an auxiliary contact structure needs to be added, only the mold cavities of the fixing seat 82 and the intermediate guide 7 need to be added to the injection mold, and the process is convenient and has higher applicability.

[0033] Furthermore, the auxiliary moving reed 2 is a conductive metal sheet with elastic deformation ability, and is integrally formed with the insulating base 61 of the push rod member 6 by injection molding process, and can move synchronously with the push rod member 6. The auxiliary moving reed 2 includes a deformation part 21 and a contact part 22. The deformation part 21 is a U-shaped structure with an opening facing downwards, one end of which is fixedly connected to the insulating base 61. The contact part 22 is horizontally arranged directly above the second end 72 of the intermediate guide 7 and is connected to the other end of the deformation part 21 through an arc part 23. The setting of the deformation part 21 enables the auxiliary moving reed 2 to generate a certain elastic deformation when moving downwards to contact the intermediate guide 7, ensuring reliable contact between the auxiliary moving reed 2 and the contact point 721 of the intermediate guide 7, and enabling the auxiliary moving reed 2 to return to its original state when the auxiliary moving reed 2 is disconnected from the intermediate guide 7, so as to meet the over-travel requirement of the auxiliary contact structure.

[0034] In summary, for the auxiliary contact structure of the relay provided by the present utility model, by arranging an intermediate guide between the auxiliary contact lead-out end and the auxiliary moving reed piece, and connecting the intermediate guide to the yoke iron plate through an insulating member, the cost is low, the structure and process are simple. In addition, the intermediate guide is structurally stable under the support of the insulating member, ensuring the reliability of the auxiliary contact structure under long-term use.

[0035] Many specific details have been set forth in the above description to facilitate a full understanding of the present utility model. However, the above description is only a preferred embodiment of the present utility model, and the present utility model can be implemented in many other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed above. At the same time, any person skilled in the art can make many possible changes and modifications to the technical solution of the present utility model by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes. All those that do not depart from the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model, still fall within the scope of the protection of the technical solution of the present utility model.

Claims

1. An auxiliary contact structure of a relay, comprising an auxiliary contact lead-out terminal (1), an auxiliary moving spring (2), a yoke iron plate (3), and a ceramic cover (4) arranged on the upper side of the yoke iron plate (3), wherein a sealed driving cavity (5) is formed between the ceramic cover (4) and the yoke iron plate (3), and a push rod component (6) is arranged in the driving cavity (5), characterized in that: Two auxiliary contact lead-out terminals (1) are arranged on the top wall of the ceramic cover (4) and their respective bottom ends extend into the driving cavity (5); two auxiliary movable springs (2) are arranged on the insulating base (61) of the push rod component (6) and correspond to the two auxiliary contact lead-out terminals (1); An intermediate guide (7) is provided between each group of corresponding auxiliary contact lead-out terminals (1) and auxiliary movable springs (2); driven by a push rod component (6), the auxiliary movable springs (2) are connected to or disconnected from the auxiliary contact lead-out terminals (1) through the intermediate guide (7); the intermediate guide (7) is provided on the yoke iron plate (3) through an insulating component (8).

2. The auxiliary contact structure of the relay according to claim 1, characterized in that: The intermediate guide (7) is made of conductive material, the insulating member (8) is made of plastic material, and the intermediate guide (7) and the insulating member (8) are integrally formed by injection molding.

3. The auxiliary contact structure of the relay according to claim 1, characterized in that: The intermediate guide (7) comprises a first end (71) connected to the auxiliary contact lead-out end (1), and a second end (72) provided on the insulating member (8) and corresponding to the auxiliary movable spring (2).

4. The auxiliary contact structure of the relay according to claim 3, characterized in that: The first end (71) is provided with a plug hole (711) for inserting the bottom end of the auxiliary contact lead-out terminal (1); the upper surface of the second end (72) is provided with a contact point (721) for contacting the auxiliary movable spring (2).

5. The auxiliary contact structure of the relay according to claim 4, characterized in that: A plurality of convex ribs (7111) are arranged at intervals on the inner peripheral wall of the plug hole (711), and the plurality of convex ribs (7111) are respectively arranged toward the axis of the plug hole (711) and inclined downward.

6. The auxiliary contact structure of the relay according to claim 4, characterized in that: The intermediate guide (7) has a "]"-shaped structure, wherein the first end (71) and the second end (72) are two horizontal sections arranged vertically and relatively parallel to each other, and the two horizontal sections are connected via a vertical section (73).

7. The auxiliary contact structure of the relay according to claim 6, characterized in that: The lower end of the insulating member (8) is connected to the yoke iron plate (3), and the upper end is provided with two horizontally arranged embedding grooves (81) and two fixing seats (82) arranged vertically upward at one end of the embedding grooves (81); the second end (72) of the intermediate guide (7) is arranged on the embedding groove (81), and the vertical section (73) is arranged in the fixing seat (82).

8. The auxiliary contact structure of the relay according to claim 4, characterized in that: The auxiliary movable spring sheet (2) is a conductive metal sheet with elastic deformation capability, and is integrally formed with the insulating base (61) of the push rod component (6) by using an injection molding process.

9. The auxiliary contact structure of the relay according to claim 8, characterized in that: The auxiliary movable spring (2) comprises a deformation portion (21) and a contact portion (22); the deformation portion (21) is a U-shaped structure with an opening facing downward, one end of which is fixedly connected to the insulating base (61); the contact portion (22) is horizontally arranged directly above the second end (72) of the intermediate guide (7) and is connected to the other end of the deformation portion (21) via an arc portion (23).

10. The auxiliary contact structure of the relay according to claim 1, characterized in that: The insulating member (8) is a square member, wherein a clearance hole (83) for avoiding the push rod member (6) is provided in the middle thereof, and positioning holes (84) are respectively provided at the four corners; a boss (31) corresponding to the positioning hole (84) is provided on the yoke iron plate (3); the boss (31) is interference-fitted with the positioning hole (84).

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