Auxiliary contact structure and relay comprising same

Abstract

The utility model relates to an auxiliary contact structure and a relay comprising the same, and the auxiliary contact structure comprises an outer cover, and a plurality of static contacts and a plurality of auxiliary leading-out terminals which are connected with the outer cover. The auxiliary contact structure further comprises an auxiliary reed fixing block connected with the outer cover, an auxiliary movable reed and an auxiliary static reed, the auxiliary movable reed and the auxiliary static reed are integrally connected with the auxiliary reed fixing block, and one end, extending out of the auxiliary reed fixing block, of the auxiliary movable reed and one end, extending out of the auxiliary reed fixing block, of the auxiliary static reed are respectively connected with an auxiliary leading-out terminal. And the other ends, extending into the auxiliary reed fixing block, of the auxiliary movable reed and the auxiliary static reed abut against each other or are far away from each other. The auxiliary reed fixing block and the auxiliary movable reed are integrally connected, so that the auxiliary movable reed and the auxiliary reed fixing block do not need to be assembled any more, assembling procedures are reduced, and reliability is improved.

Description

Technical Field

[0001] The utility model relates to the field of relays, in particular to an auxiliary contact structure for a high-voltage direct current relay and a relay comprising the structure. Background Art

[0002] A relay is an electrical control device. When the change in input quantity reaches the specified requirement, it causes a predetermined step change in the controlled quantity in the electrical output circuit. Relays have an interactive relationship between the control system and the controlled system. They are usually used in automated control circuits. In fact, they are an "automatic switch" that uses a small current to control a large current. Therefore, they play the role of automatic adjustment, safety protection, and circuit conversion in the circuit.

[0003] At present, due to the development of relay control technology, high-voltage DC relays are required to have auxiliary contacts. Auxiliary contacts are used to realize detection or monitoring functions in control circuits. However, traditional relays with auxiliary contacts have the following problems:

[0004] (1) The assembly and fixing steps of the auxiliary moving spring are complicated and have poor reliability.

[0005] (2) The location of the auxiliary moving spring and the auxiliary terminal is easily affected by the arc generated when the main contacts are closed or opened, resulting in high voltage breakdown.

[0006] (3) After long-term use, the auxiliary spring will deform greatly and is prone to breakage and damage.

[0007] (iv) The auxiliary reed can be assembled with the auxiliary lead-out terminal only after the cavity is closed. If the assembly status needs to be checked, the assembly status can only be checked by destroying the structure or using X-rays, which results in high inspection costs. Summary of the invention

[0008] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an auxiliary contact structure and a relay including the structure to solve one or more problems in the prior art.

[0009] To achieve the above purpose, the technical solution of the utility model is as follows:

[0010] The auxiliary contact structure comprises an outer cover, a plurality of static contacts connected to the outer cover, and a plurality of auxiliary lead-out terminals. The auxiliary contact structure also comprises an auxiliary spring fixing block connected to the outer cover, and an auxiliary moving spring and an auxiliary static spring integrally connected to the auxiliary spring fixing block. One end of the auxiliary moving spring and the auxiliary static spring extending out of the auxiliary spring fixing block are respectively connected to an auxiliary lead-out terminal, and the other ends of the auxiliary moving spring and the auxiliary static spring extending into the auxiliary spring fixing block are in contact with each other or away from each other.

[0011] Furthermore, a limiting portion is arranged on the outer side of the auxiliary spring fixing block, and the limiting portion protrudes along the outer side of the auxiliary spring fixing block.

[0012] Furthermore, a limiting groove which can cooperate with the limiting portion is provided on the inner side of the outer cover.

[0013] Correspondingly, the utility model also provides a relay, the relay comprising the above-mentioned auxiliary contact structure, driving device, movable spring and elastic member, one end of the elastic member abuts against the movable spring member, and the other end of the elastic member is connected to a part of the driving group device; the relay also includes an auxiliary push rod assembly, and a part of the auxiliary push rod assembly is connected to another part of the driving device.

[0014] Furthermore, the pushing device includes an insulating seat and a pushing rod connected to a part of the insulating seat, the other part of the insulating seat is connected to a fixing plate, and a first bayonet is provided on the fixing plate.

[0015] Furthermore, the auxiliary push rod assembly includes a first stop plate, first clamping blocks are respectively arranged on both sides of the first stop plate, and a first push rod is also arranged on a side of the first stop plate away from the movable spring plate.

[0016] Furthermore, the auxiliary push rod assembly includes a second stop plate and a push rod fixing block covering part of the second stop plate, second clamping blocks are respectively arranged on both sides of the second stop plate, fixing plates are respectively clamped on both sides of the push rod fixing block, and a second push rod is arranged on a side of the push rod fixing block away from the movable spring plate.

[0017] Furthermore, at least one first protrusion is provided on a surface of the movable spring piece close to the insulating seat.

[0018] Furthermore, a second protrusion is provided on the insulating seat, and an annular groove is provided on the insulating seat surrounding the outer side of the second protrusion.

[0019] Compared with the prior art, the beneficial technical effects of the utility model are as follows

[0020] (i) The auxiliary spring fixing block is integrally connected to the auxiliary moving spring, so that the auxiliary moving spring and the auxiliary spring fixing block no longer need to be assembled, which reduces assembly procedures and improves reliability.

[0021] (ii) Furthermore, the auxiliary moving spring lead-out terminals are located at both ends of the auxiliary spring fixing block and are connected to each auxiliary moving spring, which is far away from the static contact point and is not easily affected by the arc, thereby avoiding breakdown by high voltage.

[0022] (iii) Furthermore, the first push rod or the second push rod is located at the center of the auxiliary spring fixing block, so that after the auxiliary movable spring is tilted upward, the deformation of the auxiliary movable spring is small and it is not easy to break or damage.

[0023] (iv) Furthermore, providing an annular groove on the insulating seat and setting a second boss can facilitate the assembly of the elastic member, prevent the elastic member from detaching from the insulating seat, and improve the assembly stability of the elastic member.

[0024] (V) Furthermore, a limiting portion is provided on the outer side of the auxiliary spring fixing block, and a limiting groove is provided on the inner side of the outer cover, thereby ensuring a reliable connection between the auxiliary spring fixing block and the outer cover.

[0025] (VI) Furthermore, the present invention can conveniently and intuitively visually check the contact state and assembly state of the auxiliary lead-out terminal inside the outer cover and the auxiliary moving spring piece and the auxiliary static spring piece before assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The auxiliary contact structure of the embodiment of the utility model and the structural schematic diagram of the relay including the structure are shown.

[0027] Figure 2 The auxiliary contact structure of the utility model embodiment and the connection diagram of the insulating seat and the fixing plate in the relay including the structure are shown.

[0028] Figure 3 The schematic diagram of the structure of the auxiliary contact structure of the embodiment of the utility model and the movable reed in the relay including the structure is shown.

[0029] Figure 4 The schematic diagram of the structure of the auxiliary contact structure of the embodiment of the utility model and the outer cover of the relay including the structure is shown.

[0030] Figure 5 The schematic diagram of the structure of the auxiliary contact structure of the first embodiment of the utility model and the relay including the structure in the normally closed state is shown.

[0031] Figure 6 The auxiliary contact structure of the second embodiment of the utility model and the schematic diagram of the structure of the relay containing the structure in the normally open state are shown.

[0032] Figure 7 The auxiliary contact structure of the third embodiment of the utility model and a partial structural schematic diagram of a relay including the structure are shown.

[0033] Figure 8 The auxiliary contact structure of the third embodiment of the utility model and a partial structural schematic diagram of a relay including the structure are shown.

[0034] Fig. 9 The schematic diagram of the structure of the auxiliary contact structure of the third embodiment of the utility model and the relay including the structure in the normally closed state is shown.

[0035] Fig.10The schematic diagram of the structure of the auxiliary contact structure of the fourth embodiment of the utility model and the relay containing the structure in the normally open state is shown.

[0036] Markings in the accompanying drawings: 100, auxiliary lead-out terminal; 101, static contact; 102, outer cover; 1020, limiting groove; 103, frame piece; 200, limiting part; 201, auxiliary spring fixing block; 202, auxiliary moving spring; 203, auxiliary static spring; 300, first push rod; 301, first stop plate; 3010, first clamping block; 302, fixing plate; 3020, first bayonet; 3021, second bayonet; 303, moving spring; 3030, first protrusion; 304, elastic member; 305, insulating seat; 3050, annular groove; 3051, second protrusion; 306, pushing rod; 307, push rod fixing block; 3070, second clamping block; 308, second push rod; 309, second stop plate; 3090, third clamping block. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the utility model clearer, the auxiliary contact structure proposed by the utility model and the relay containing the structure are further described in detail in combination with the drawings and specific implementation methods. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.

[0038] Embodiment 1:

[0039] Please refer to Figure 1 The auxiliary contact structure includes an outer cover 102, a plurality of static contacts 101 connected to the outer cover 102, and a plurality of auxiliary lead terminals 100, wherein in the auxiliary contact structure of the first embodiment of the utility model, there are two static contacts 101 and two auxiliary lead terminals 100. The auxiliary contact structure also includes a frame sheet 103, and the frame sheet 103 is connected to the outer cover 102.

[0040] For further information, please continue to refer to Figure 1The auxiliary contact structure also includes an auxiliary spring fixing block 201 connected to the outer cover 102, and an auxiliary moving spring 202 and an auxiliary static spring 203 integrally connected to the auxiliary spring fixing block 201. Please refer to Figure 5 , the auxiliary moving spring 202 is located on the right side of the auxiliary spring fixing block 201 , and the auxiliary static spring 203 is located on the left side of the auxiliary spring fixing block 201 .

[0041] For further information, please refer to Figure 5 , one end of the auxiliary moving spring 202 extends from the right side of the auxiliary spring fixing block 201 and is connected to an auxiliary lead-out terminal 100, one end of the auxiliary static spring 203 extends from the left side of the auxiliary spring fixing block 201 and is connected to another auxiliary lead-out terminal 100, and the auxiliary lead-out terminal 100 is located on the left and right sides of the auxiliary spring fixing block 201, and is arranged away from the static contact 101. The other ends of the auxiliary moving spring 202 and the auxiliary static spring 203 extend toward the middle part of the auxiliary spring fixing block 201 respectively, and the auxiliary moving spring 202 and the auxiliary static spring 203 abut against each other, so that when the pushing device contacts the auxiliary moving spring 202, the auxiliary moving spring 202 can be moved and separated from the auxiliary static spring 203, thereby disconnecting the auxiliary circuit.

[0042] For further information, please continue to refer to Figure 1 A limiting portion 200 is further provided on the outer side, i.e., the upper surface, of the auxiliary spring fixing block 201. The limiting portion 200 protrudes along the upper surface of the auxiliary spring fixing block 201 in a vertical direction. The limiting portion 200 is preferably a rectangular structure.

[0043] For further information, please refer to Figure 4 A limiting groove 1020 that can cooperate with the limiting portion 200 is opened on the inner side of the outer cover 102. The limiting portion 200 can be embedded in the limiting groove 1020 and fixed by glue to ensure a reliable connection between the outer cover 102 and the auxiliary spring fixing block 201.

[0044] Of course, in other embodiments of the present invention, a groove may be provided on the outer side of the auxiliary spring fixing block 201, and a limiting protrusion may be provided on the inner side of the outer cover 102, and the present invention does not make any further limitation on this.

[0045] Please continue to refer to Figure 5 The utility model also provides a relay, which includes the above-mentioned auxiliary contact structure, a driving device, a movable spring 303 and an elastic member 304, one end of the elastic member 304 abuts against the movable spring 303, and the other end of the elastic member 304 is connected to a part of the driving group device; the relay also includes an auxiliary push rod assembly, a part of the auxiliary push rod assembly is connected to another part of the driving device.

[0046] For details, please continue to refer to Figure 5 The pushing device includes an insulating seat 305 and a pushing rod 306 connected to the bottom of the insulating seat 305. The upper part of the insulating seat 305 is connected to multiple fixing plates 302. Each fixing plate 302 is symmetrically arranged with the insulating seat 305 as the center, and a first bayonet 3020 is also opened on each fixing plate 302.

[0047] For further information, please continue to refer to Figure 5 The auxiliary push rod assembly includes a first stop plate 301, and first clamping blocks 3010 that can be engaged with the first clamping slot 3020 are respectively arranged on both sides of the first stop plate 301. The first push rod 300 is arranged on a side of the first stop plate 301 away from the movable spring plate 303, that is, it is arranged on the top surface of the first stop plate 301.

[0048] For further information, please refer to Figure 3 In order to ensure that the elastic member 304 is not easy to fall off, at least one first protrusion 3030 is further provided on the side of the movable spring piece close to the insulating path 5305. Specifically, the first protrusions 3030 are preferably 4, and the setting position of each first protrusion 3030 is located within the inner diameter area of ​​the elastic member 304, and the outer side of each first protrusion 3030 can contact the inner side of the elastic member 304, so as to achieve connection with the elastic member 304 through each first protrusion 3030.

[0049] Furthermore, in order to ensure the connection stability between the elastic member 304 and the insulating seat 305, a second protrusion 3051 is also provided on the insulating seat 305, and the outer diameter of the second protrusion 3051 is smaller than the inner diameter of the elastic member 304, so that the elastic member 304 can be sleeved on the second protrusion 3051. At the same time, in order to ensure the connection stability of the elastic member 304, an annular groove 3050 is also provided on the insulating seat 305 around the outer side of the second protrusion 3051, and the annular groove 3050 can conveniently embed the elastic member 304 to prevent it from falling off the insulating seat 305.

[0050] Please refer to Figure 5 When the relay is in the disconnected state, there is a gap between the first push rod 300 and the auxiliary moving spring 202. At this time, the first push rod 300 does not contact the auxiliary moving spring 202, the auxiliary moving spring 202 and the auxiliary static spring 203 are engaged with each other, and the auxiliary circuit is turned on. When the relay is in the closed state, the push rod 306 is forced to drive the insulating seat 305, the fixing plate 302, the first stop plate 301 and the first push rod 300 to move upward and contact the auxiliary moving spring 202. The auxiliary moving spring 202 is forced to tilt upward and separate from the auxiliary static spring 203, so that the auxiliary circuit is disconnected, and the moving spring 303 contacts the static contact 101, so that the main circuit is turned on.

[0051] Embodiment 2

[0052] Please refer to Figure 6 The second embodiment is similar to the first embodiment in most of its structures and working modes, except that in this embodiment, the auxiliary movable spring 202 and the auxiliary static spring 203 are far away from each other and are in a normally open state. When the first push rod 300 contacts the auxiliary movable spring 202, the auxiliary movable spring 202 will be tilted upward and contact the auxiliary static spring 203, thereby achieving the conduction of the auxiliary circuit, otherwise the auxiliary circuit will be disconnected.

[0053] Embodiment 3

[0054] Please refer to Figures 7 to 9 Most of the structures and working methods of the third embodiment are the same as those of the first embodiment, except for the auxiliary ejector assembly. In the third embodiment, the auxiliary ejector assembly includes a second stop plate 309 and a ejector fixing block 307 covering part of the second stop plate 309. The second stop plate 309 has third clamping blocks 3090 on both sides that can be clamped with the fixing plate 302. The two sides of the ejector fixing block 307 extend along the outer side of the fixing plate 302 and are clamped with each fixing plate 302. Second clamping blocks 3070 are provided inside the two sides of the ejector fixing block 307, and a second clamping port 3021 that can be clamped with the second clamping block 3070 is provided on the fixing plate 302. A second ejector 308 is provided on the side of the ejector fixing block 307 away from the movable spring plate 303, i.e., the upper surface of the ejector fixing block 307.

[0055] Embodiment 4

[0056] Please refer to Fig.10 The fourth embodiment has the same structure as the third embodiment, except that the auxiliary movable spring 202 and the auxiliary static spring 203 are far from each other and are in a normally open state. When the first push rod 300 contacts the auxiliary movable spring 202, the auxiliary movable spring 202 will be tilted upward and contact the auxiliary static spring 203, thereby achieving the auxiliary circuit conduction, otherwise the auxiliary circuit will be disconnected.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An auxiliary contact structure, comprising an outer cover, a plurality of static contacts connected to the outer cover, and a plurality of auxiliary lead terminals, characterized in that: The auxiliary contact structure also includes an auxiliary spring fixing block connected to the outer cover, and an auxiliary moving spring and an auxiliary static spring integrally connected to the auxiliary spring fixing block, one end of the auxiliary moving spring and the auxiliary static spring extending out of the auxiliary spring fixing block is respectively connected to an auxiliary lead-out terminal, and the other ends of the auxiliary moving spring and the auxiliary static spring extending into the auxiliary spring fixing block are in contact with or away from each other.

2. The auxiliary contact structure according to claim 1, characterized in that: A limiting portion is arranged on the outer side of the auxiliary spring fixing block, and the limiting portion protrudes along the outer side of the auxiliary spring fixing block.

3. The auxiliary contact structure according to claim 2, characterized in that: The inner side of the outer cover is provided with a limiting groove which can be matched with the limiting part.

4. A relay, characterized in that: The relay includes the auxiliary contact structure, a pushing device, a movable spring and an elastic member as described in any one of claims 1 to 3, one end of the elastic member abuts against the movable spring, and the other end of the elastic member is connected to a part of the pushing group device; the relay also includes an auxiliary push rod assembly, and a part of the auxiliary push rod assembly is connected to another part of the pushing device.

5. A relay as claimed in claim 4, characterized in that: The pushing device comprises an insulating seat and a pushing rod connected to a part of the insulating seat, the other part of the insulating seat is connected to a fixing plate, and a first bayonet is provided on the fixing plate.

6. A relay as claimed in claim 5, characterized in that: The auxiliary push rod assembly comprises a first stop plate, first clamping blocks are respectively arranged on both sides of the first stop plate, and a first push rod is also arranged on a side of the first stop plate away from the movable spring plate.

7. A relay as claimed in claim 5, characterized in that: The auxiliary push rod assembly includes a second stop plate and a push rod fixing block covering part of the second stop plate, second clamping blocks are respectively arranged on both sides of the second stop plate, and fixing plates are respectively clamped on both sides of the push rod fixing block, and a second push rod is arranged on a side of the push rod fixing block away from the movable spring plate.

8. A relay as claimed in claim 4, characterized in that: At least one first protrusion is also arranged on a side of the movable spring piece close to the insulating seat.

9. A relay as claimed in claim 8, characterized in that: A second protrusion is also arranged on the insulating seat, and an annular groove is also arranged on the insulating seat around the outer side of the second protrusion.

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