Auxiliary contact structure and relay

Abstract

The utility model discloses an auxiliary contact structure and a relay, the auxiliary contact structure comprises at least one group of auxiliary contacts, and the auxiliary contacts comprise an auxiliary movable reed provided with an auxiliary movable contact and an auxiliary static reed provided with an auxiliary static contact; the electromagnetic relay also comprises a first circuit board, and the auxiliary movable reed and the auxiliary static reed are respectively installed on the first circuit board and cooperate with each other. According to the utility model, the first circuit board is used as a carrier of the auxiliary contact, so that when the auxiliary contact structure is applied to the high-voltage direct-current relay, the auxiliary contact does not need to be installed on a plastic frame by the high-voltage direct-current relay, thereby avoiding deformation of the plastic frame due to installation of the auxiliary contact, influence of heating of the auxiliary contact and the like, and prolonging the service life of the high-voltage direct-current relay. And the service life of the high-voltage direct-current relay can be prolonged.

Description

Technical Field

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

[0002] A relay is an electronic control device with a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits and is essentially an "automatic switch" that uses a smaller current to control a larger current. Therefore, it performs functions such as automatic regulation, safety protection, and circuit conversion in circuits. A high-voltage DC relay is a type of relay, and most of them use a direct-acting design. Its contact assembly consists of two stationary contacts and a moving assembly, which includes a moving contact piece and a push rod. The moving spring portion consists of a moving spring piece and moving contacts at each end of the moving spring piece. The moving spring piece is usually a straight-type piece. One type of high-voltage DC relay in the prior art uses a fully sealed structure. To ensure product insulation and the arrangement of auxiliary contacts, such fully sealed high-voltage DC relays typically include a plastic frame inside the cavity, on which the auxiliary contacts are mounted. However, because the plastic frame is made of plastic, the auxiliary contacts are easily deformed during installation. Furthermore, the auxiliary contacts generate heat during electrical conduction, which is directly transferred to the plastic frame, causing deformation over time. Utility Model Content

[0003] The utility model aims to solve the technical problems existing in the prior art and provides an auxiliary contact structure and a relay, which eliminates the need for the auxiliary contacts to be arranged on a plastic frame, thereby preventing the auxiliary contacts from being deformed.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an auxiliary contact structure, including at least one group of auxiliary contacts, wherein the auxiliary contacts include an auxiliary moving spring provided with an auxiliary moving contact and an auxiliary static spring provided with an auxiliary static contact; and further including a first circuit board, wherein the auxiliary moving spring and the auxiliary static spring are respectively mounted on the first circuit board and cooperate with each other.

[0005] Furthermore, the auxiliary movable contacts and the auxiliary static contacts that cooperate with each other are arranged opposite to each other in the thickness direction of the first circuit board.

[0006] Furthermore, one end of the auxiliary movable spring provided with the auxiliary movable contact is provided with an extension portion, and the first circuit board is provided with a clearance through hole corresponding to the extension portion.

[0007] Furthermore, a push rod that can move along the thickness direction of the first circuit board is movably provided in the said yielding through hole, and the push rod is used to push the extension part of the said auxiliary movable spring to close or open the said auxiliary movable contact and the auxiliary static contact.

[0008] Furthermore, there are multiple groups of auxiliary contacts, and the auxiliary movable springs of the multiple groups of auxiliary contacts share the same said yielding through hole.

[0009] Furthermore, a plurality of clamping springs are installed on the first circuit board, and the plurality of clamping springs include a plurality of first clamping springs, a part of the first clamping springs are electrically connected one by one with the auxiliary movable spring pieces, and the remaining first clamping springs are electrically connected one by one with the auxiliary static spring pieces, and each first clamping spring is used to clamp the auxiliary lead-out end of the auxiliary movable spring piece or the auxiliary static spring piece.

[0010] Furthermore, positioning notches are provided on the edge of the first circuit board corresponding to the respective clamping springs, and the respective clamping springs are fitted in the corresponding positioning notches, and the clamping points of the respective clamping springs are lower than the upper surface of the first circuit board.

[0011] The present invention further provides a relay, comprising the auxiliary contact structure described above in the present invention.

[0012] Furthermore, the relay is a high-voltage DC relay, which also includes two static contacts, a moving contact piece, a push rod component, a ceramic cover and a plastic frame. The two static contacts are respectively mounted on the ceramic cover, and the ceramic cover has a first cavity opening downward, and the upper part of the plastic frame is accommodated in the first cavity; the plastic frame is provided with a second cavity, and the bottoms of the two static contacts respectively extend into the second cavity of the plastic frame and cooperate with the two ends of the moving contact piece accommodated in the second cavity; the push rod component extends into the second cavity and connects the moving contact piece; the first circuit board is arranged between the ceramic cover and the plastic frame, and the auxiliary moving spring piece is driven by the push rod component.

[0013] Furthermore, it also includes a coil assembly located below the plastic frame, the pushing rod component extends into the coil assembly and is connected to the moving iron core of the coil assembly; the coil of the coil assembly is led out through the first circuit board.

[0014] Furthermore, a plurality of clamp springs are installed on the first circuit board, and the plurality of clamp springs include a plurality of second clamp springs, each second clamp spring is used to clamp the coil lead end of the coil assembly and is electrically connected to the corresponding coil terminal of the coil assembly.

[0015] Furthermore, it also includes a second circuit board, on which are installed a plurality of third clamping springs electrically connected one by one to each coil terminal of the coil assembly; a plurality of conductive posts are installed on the first circuit board, and the plurality of conductive posts are electrically connected one by one to the plurality of second clamping springs respectively; the plurality of third clamping springs correspond one by one to the plurality of conductive posts, and each third clamping spring clamps the corresponding conductive post respectively.

[0016] Furthermore, the tops of the two static contacts are respectively electrically connected to a lead block, and the lead block is electrically connected to at least one contact lead end; the contact lead end is provided with an external thread.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Since the present invention further includes a first circuit board, the auxiliary moving reed and the auxiliary static reed are respectively mounted on the first circuit board and cooperate with each other. Therefore, when the auxiliary contact structure of the present invention is applied to a high-voltage DC relay, there is no need to mount the auxiliary contacts on the plastic frame of the high-voltage DC relay. This avoids deformation of the plastic frame due to the installation of the auxiliary contacts and the heating of the auxiliary contacts, thereby helping to extend the service life of the high-voltage DC relay.

[0019] 2. Since multiple clamping springs are installed on the first circuit board, the multiple clamping springs include multiple first clamping springs electrically connected to the auxiliary dynamic spring pieces and the auxiliary static spring pieces one by one and / or multiple second clamping springs electrically connected to the coil assembly of the high-voltage DC relay. The first clamping springs are used to clamp the auxiliary lead-out ends of the auxiliary contacts, and the second clamping springs are used to clamp the coil lead-out ends of the coil assembly, so that the auxiliary contacts and / or coil assemblies of the utility model can be led out by clamping with clamping springs, which makes the operation more convenient and ensures the reliability of the electrical connection.

[0020] 3. The high-voltage DC relay of the present invention also includes a second circuit board, which is provided with a plurality of third clamping springs electrically connected one by one to each coil terminal of the coil assembly. The first circuit board is equipped with a plurality of conductive posts electrically connected one by one to the plurality of second clamping springs. The plurality of third clamping springs respectively clamp the corresponding conductive posts, so that the coil of the present invention is transferred to the first circuit board through the second circuit board, and the second circuit board and the first circuit board are transferred by plug-in method, which makes the operation more convenient.

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

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the auxiliary contact structure of the utility model in the first embodiment;

[0023] Figure 2 1 is a top view of the auxiliary contact structure of the utility model in embodiment 1;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the first circuit board of the utility model in accordance with the first embodiment;

[0025] Figure 4This is a schematic diagram of the three-dimensional structure of the high-voltage DC relay of the first embodiment of the utility model. Figure 1 (Reflection of the local);

[0026] Figure 5 1 is a cross-sectional view of a high-voltage DC relay according to a first embodiment of the utility model;

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the high-voltage DC relay of the first embodiment of the utility model. Figure 2 (Reflection of the local);

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of the high-voltage DC relay of the first embodiment of the utility model. Figure 3 ;

[0029] Figure 8 This is a top view of the auxiliary contact structure of the utility model in the second embodiment;

[0030] Figure 9 This is a bottom view of the auxiliary contact structure of the second embodiment of the present utility model;

[0031] Figure 10 This is a schematic diagram of the three-dimensional structure of the high-voltage DC relay of the second embodiment of the present invention. Figure 1 (Reflection of the local);

[0032] Figure 11 This is Example 2 Figure 10 A top view of

[0033] In the figure, 1. auxiliary moving spring, 11. extension part, 12. auxiliary moving contact, 2. auxiliary static spring, 3. first circuit board, 31. clearance through hole, 32. positioning notch, 33. conductive column, 34. push rod, 4. first clamping spring, 5. second clamping spring, 6. auxiliary lead-out terminal, 7. coil lead-out terminal, 8. static contact, 81. lead-out block, 82. contact lead-out terminal, 9. moving contact piece, 10. ceramic cover, 20. plastic frame, 30. push rod component, 40. coil assembly, 41. coil, 42. coil frame, 50. second circuit board. DETAILED DESCRIPTION

[0034] In the present invention, the terms "first" and "second" are only used to distinguish similar objects, rather than to describe a specific order or precedence, and should not be understood as indicating or implying relative importance. In the description, the use of "upper", "lower", "inner", "outer", "top / bottom" and other indications of orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing the present invention, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0035] In addition, in the description of the present invention, unless otherwise specified, "multiple groups" refers to two or more groups; "multiple" refers to two or more; "several" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" 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 a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example 1

[0037] See Figure 1-Figure 3 As shown, an auxiliary contact structure of the present invention includes multiple groups of auxiliary contacts. Specifically, in this embodiment, the present invention includes two groups of auxiliary contacts, but it is not limited to this. In other embodiments, the present invention only includes one group of auxiliary contacts. Each group of auxiliary contacts includes an auxiliary moving spring 1 provided with an auxiliary moving contact 12 and an auxiliary static spring 2 provided with an auxiliary static contact. The auxiliary moving contact 12 and the auxiliary moving spring 1 can be integrally formed, or they can be separately provided and fixedly connected; the relationship between the auxiliary static contact and the auxiliary static spring 2 is also the same. The utility model also includes a first circuit board 3, and the auxiliary moving spring 1 and the auxiliary static spring 2 of each group of auxiliary contacts are respectively installed on the first circuit board 3 and cooperate with each other.

[0038] like Figure 1 、 Figure 2As shown, the auxiliary movable contact 12 and the auxiliary static contact that cooperate with each other are arranged relative to each other in the thickness direction of the first circuit board 3, and the auxiliary movable contact 12 is located between the auxiliary static contact and the first circuit board 3. Therefore, the auxiliary contact of the present invention is a normally open type, but is not limited to this. In other embodiments, the auxiliary contact is a normally closed type, and its auxiliary static contact is located between the auxiliary movable contact 12 and the first circuit board.

[0039] Each auxiliary moving spring 1 is provided with an auxiliary moving contact 12 at one end thereof, and an extension portion 11 is provided on the first circuit board 3 corresponding to the extension portion 11, and a push rod 34 (such as a push rod 34) that can move along the thickness direction of the first circuit board 3 is movably provided in the through hole 31. Figure 5 (as shown), the push rod 34 is used to push the extension 11 of the auxiliary movable spring 2 to close or open the auxiliary movable contact 23 and the auxiliary static contact. The auxiliary movable springs 1 of each group of auxiliary contacts share the same clearance hole 31. Therefore, the extension 11 of the auxiliary movable spring 1 of each group of auxiliary contacts is pushed by the same push rod 34.

[0040] As a preferred embodiment, a plurality of clamp springs are mounted on the first circuit board 3, and the plurality of clamp springs include a plurality of first clamp springs 4 electrically connected to the auxiliary dynamic spring piece 1 and the auxiliary static spring piece 2 and / or a plurality of second clamp springs 5 ​​electrically connected to the coil assembly of the high-voltage DC relay. The first clamp spring 4 is used to clamp the auxiliary lead-out terminal 6 of the auxiliary contact, and the second clamp spring 5 is used to clamp the coil lead-out terminal 7 of the coil assembly. Figure 6 Specifically, in this embodiment, six clamp springs are provided on the first circuit board 3 . Since there are two groups of auxiliary contacts, four of the six clamp springs are first clamp springs 4 and the remaining two are second clamp springs 5 ​​.

[0041] In this embodiment, positioning notches 32 are provided at the edge of the first circuit board 3 corresponding to each clamp spring, each clamp spring is fitted in the corresponding positioning notch 32 , and the clamping point of each clamp spring is lower than the upper surface of the first circuit board 3 .

[0042] In this embodiment, the first circuit board 3 has a generally butterfly-shaped structure, with two sets of auxiliary contacts located on the wings of the butterfly structure, facing each other. The clearance hole 31 is located in the center of the first circuit board 3. The six clip springs are divided into two groups, each containing three clip springs, and are arranged at the edges of the wings of the butterfly structure.

[0043] The present invention provides an auxiliary contact structure that uses a first circuit board 3 as a carrier for the auxiliary contact. This allows the high-voltage DC relay to avoid having to install the auxiliary contact on a plastic frame when the auxiliary contact structure is applied to the high-voltage DC relay. This prevents the plastic frame from being deformed due to the installation of the auxiliary contact and the heating of the auxiliary contact, thereby helping to extend the service life of the high-voltage DC relay. In addition, the present invention also uses the first circuit board 3 to act as a switching circuit, so that the auxiliary contact and the coil assembly of the high-voltage DC relay can be switched and led out through the first circuit board 3. This allows the lead-out position to be adjusted according to external wiring requirements, avoiding the clutter caused by the use of wires, and providing good consistency, which is conducive to automated assembly. In addition, the first circuit board 3 uses a spring clamping method to lead out the coil assembly and the auxiliary contact, which has the characteristics of convenient operation and good electrical connection reliability.

[0044] See Figure 1-Figure 7 As shown, a relay of the present invention includes an auxiliary contact structure of the present invention as described above. The relay of the present invention is specifically a high-voltage DC relay, which also includes two static contacts 8, a moving contact piece 9, a push rod component 30, a ceramic cover 10 and a plastic frame 20. The two static contacts 8 are respectively mounted on the ceramic cover 10. The ceramic cover 10 has a first cavity opening downward, and the upper part of the plastic frame 20 is accommodated in the first cavity; the plastic frame 20 is provided with a second cavity, and the bottoms of the two static contacts 8 respectively extend into the second cavity of the plastic frame 20 and cooperate with the two ends of the moving contact piece 9 accommodated in the second cavity. The push rod component 30 extends into the second cavity and connects the moving contact piece 9. The first circuit board 3 is arranged between the ceramic cover 10 and the plastic frame 20. The auxiliary moving spring piece 1 of each auxiliary contact is respectively driven by the push rod component 30. Specifically, the push rod component 30 pushes each auxiliary moving spring piece 1 to move by pushing the push rod 34.

[0045] The present invention further includes a coil assembly 40 positioned below the plastic frame 20. The coil assembly 40 includes a coil bobbin 42, a coil 41 wound around the bobbin 42, and a movable iron core movably disposed within the bobbin 42. The push rod 30 extends into the coil assembly 40 and connects to the movable iron core of the coil assembly 40. The coil 41 of the coil assembly 40 is led out through the first circuit board 3. Specifically, each second clamping spring 5 on the first circuit board 3 is electrically connected to a corresponding coil terminal of the coil assembly 40, and each second clamping spring 5 clamps the coil lead-out end 7 of the coil assembly 40.

[0046] In this embodiment, the present invention further includes a second circuit board 50, mounted on which are several third clamping springs (not shown) electrically connected one-to-one to each coil terminal of the coil assembly. Several conductive posts 33 are mounted on the first circuit board 3, each electrically connected one-to-one to the several second clamping springs 5. Several third clamping springs correspond one-to-one with the several conductive posts 33, each clamping a corresponding conductive post 33 to ensure that the coil 41 switches circuits through the first circuit board 3. In this embodiment, there are two second clamping springs 5, and therefore, there are also two conductive posts 33 and two third clamping springs.

[0047] In this embodiment, each lead block 81 on the stationary contact 8 is electrically connected to at least one contact lead terminal 82, each of which is provided with external threads and is adapted to engage with a nut for connection to an external device. This embodiment uses a single contact lead terminal 82 provided on the lead block 81 as an example, but is not intended to be limiting. In other embodiments, each lead block may be electrically connected to multiple contact leads arranged in parallel. Thus, the multiple contact leads form a parallel structure, dispersing the heat generated by the stationary contacts, facilitating heat dissipation and improving the current-carrying capacity of the stationary contacts, enabling them to withstand greater load currents. Furthermore, the provision of multiple contact leads allows them to be connected to multiple nuts when connected to an external device, with the multiple nuts sharing the connection function. This allows the torque of each nut to be reduced, ensuring a secure connection while preventing thread slippage. Furthermore, even if excessive torque on one nut causes thread slippage, the remaining nuts still perform the connecting function, preventing the entire product from becoming unreliable or even becoming scrapped.

[0048] The present invention utilizes a first circuit board 3 positioned between a ceramic cover 10 and a plastic frame 20 as a carrier for the auxiliary contacts, thereby preventing deformation of the plastic frame 20 caused by the installation of the auxiliary contacts and the effects of heating from the auxiliary contacts. The present invention also utilizes the first circuit board 3 as a switching circuit, allowing the coil assembly 40 and the auxiliary contacts to be switched and connected via the first circuit board 3. Furthermore, the first circuit board 3 utilizes a spring clamp to connect the coil assembly 40 and the auxiliary contacts, resulting in convenient operation and reliable electrical connections.

[0049] Example 2

[0050] See Figures 8-11 As shown, the auxiliary contact structure and relay of the present invention differ from the above-mentioned embodiment 1 in that the number of auxiliary contacts is four, and the four groups of auxiliary contacts are distributed roughly at four corners on the first circuit board 3. Therefore, there are a total of ten clamping springs on the first circuit board 3, eight of which are first clamping springs 4 and the remaining two are second clamping springs 5.

[0051] In this embodiment, the auxiliary movable springs 1 of the four groups of auxiliary contacts share the same clearance hole 31 . Therefore, the four extensions 11 are respectively fitted to one side of the first circuit board 3 in the thickness direction, specifically located on the upper side of the first circuit board 3 .

[0052] In this embodiment, each lead-out block 81 on the static contact 8 is electrically connected to a single contact lead-out terminal 82 , but the number of contact lead-out terminals 82 of each lead-out block 81 is not limited thereto.

[0053] The auxiliary contact structure and relay of the present invention are the same as those in the prior art or can be implemented by using the prior art.

[0054] The above embodiments are only used to further illustrate an auxiliary contact structure and 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. An auxiliary contact structure, comprising at least one set of auxiliary contacts, wherein the auxiliary contacts include an auxiliary movable spring provided with an auxiliary movable contact and an auxiliary static spring provided with an auxiliary static contact; characterized in that: It also includes a first circuit board, and the auxiliary dynamic spring and the auxiliary static spring are respectively installed on the first circuit board and cooperate with each other.

2. The auxiliary contact structure according to claim 1, characterized in that: The auxiliary movable contact and the auxiliary static contact that cooperate with each other are arranged opposite to each other in the thickness direction of the first circuit board.

3. The auxiliary contact structure according to claim 2, characterized in that: An end of the auxiliary movable spring provided with the auxiliary movable contact is provided with an extension portion, and the first circuit board is provided with a clearance through hole corresponding to the extension portion.

4. The auxiliary contact structure according to claim 3, characterized in that: A push rod is movably provided in the said yielding through hole and can move along the thickness direction of the first circuit board. The push rod is used to push the extension part of the said auxiliary moving spring to close or open the said auxiliary moving contact and the auxiliary static contact.

5. The auxiliary contact structure according to claim 3 or 4, characterized in that: There are multiple groups of auxiliary contacts, and the auxiliary movable springs of the multiple groups of auxiliary contacts share the same said yielding through hole.

6. The auxiliary contact structure according to claim 1, characterized in that: A plurality of clamping springs are installed on the first circuit board, and the plurality of clamping springs include a plurality of first clamping springs, a portion of which are electrically connected one-to-one with the auxiliary movable spring pieces, and the remaining first clamping springs are electrically connected one-to-one with the auxiliary static spring pieces, and each first clamping spring is used to clamp the auxiliary lead-out end of the auxiliary movable spring piece or the auxiliary static spring piece.

7. The auxiliary contact structure according to claim 6, characterized in that: Positioning notches are respectively provided at the edge of the first circuit board corresponding to the clamping springs. The clamping springs are respectively fitted in the corresponding positioning notches, and the clamping points of the clamping springs are respectively lower than the upper surface of the first circuit board.

8. A relay, characterized in that: The invention comprises the auxiliary contact structure according to any one of claims 1 to 7.

9. The relay according to claim 8, characterized in that: The relay is a high-voltage DC relay, which also includes two static contacts, a moving contact piece, a push rod component, a ceramic cover and a plastic frame. The two static contacts are respectively mounted on the ceramic cover. The ceramic cover has a first cavity opening downward, and the upper part of the plastic frame is accommodated in the first cavity; the plastic frame is provided with a second cavity, and the bottoms of the two static contacts respectively extend into the second cavity of the plastic frame and cooperate with the two ends of the moving contact piece accommodated in the second cavity; the push rod component extends into the second cavity and connects the moving contact piece; the first circuit board is arranged between the ceramic cover and the plastic frame, and the auxiliary moving spring piece is driven by the push rod component.

10. The relay according to claim 9, characterized in that: It also includes a coil assembly located below the plastic frame, the pushing rod component extends into the coil assembly and is connected to the moving iron core of the coil assembly; the coil of the coil assembly is led out through the first circuit board.

11. The relay according to claim 10, characterized in that: A plurality of clamp springs are mounted on the first circuit board. The plurality of clamp springs include a plurality of second clamp springs. Each second clamp spring is used to clamp the coil lead end of the coil assembly and is electrically connected to a corresponding coil terminal of the coil assembly.

12. The relay according to claim 11, characterized in that: It also includes a second circuit board, on which are mounted a plurality of third clamping springs electrically connected one by one to each coil terminal of the coil assembly; a plurality of conductive posts are mounted on the first circuit board, which are electrically connected one by one to the plurality of second clamping springs respectively; the plurality of third clamping springs correspond one by one to the plurality of conductive posts, and each third clamping spring clamps the corresponding conductive post respectively.

13. The relay according to claim 9, wherein: The tops of the two static contacts are respectively electrically connected to a lead-out block, and the lead-out block is electrically connected to at least one contact lead-out terminal; the contact lead-out terminal is provided with an external thread.

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