Movable spring part of relay and electromagnetic relay
By providing a recess on the spring lead-out piece, the other end of the recess is allowed to enter the recess, which solves the problem of insufficient anti-short current in the prior art of the spring part, which improves the short-short current resistance and stability of the relay, and reduces the cost of parts.
Patent Information
- Application Number
- CN202422166570.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-04
AI Technical Summary
The spring part of the existing relay is insufficient in its ability to resist short-circuit current, which causes the contacts to be fused and burned, affecting the stability and reliability of the circuit.
A recess is provided on the spring lead-out piece, and the other end of the spring lead-out piece can enter the recess, ensuring that the spring lead-out piece is arranged close to each other, reducing the enclosure area and enhancing the ability to resist short circuit current.
It improves the relay's short-circuit current resistance, reduces the cost of parts, and improves the stability and reliability of the electromagnetic relay without affecting the swing of the reed.
Smart Images
Figure CN223066090U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of relays, in particular to a moving contact part of a relay and an electromagnetic relay. Background Art
[0002] An electromagnetic relay is an electronic control device, which is usually applied to an automatic control circuit. It is actually an "automatic switch" that uses a smaller current to control a larger current, so it plays roles such as automatic regulation, safety protection, and circuit conversion in the circuit.
[0003] In applications such as power systems, short - circuit faults are not completely avoidable. That is, when the relay is powered on, at the moment of contact closure, a large short - circuit current is generated between the contacts. The electro - dynamic repulsive force formed by this short - circuit current is always in the opposite direction of contact closure, causing the contacts to bounce back and generating a strong electric arc, resulting in the contacts melting and burning due to the instantaneous high temperature. Therefore, if the relay does not have the ability to resist short - circuit current, once a short - circuit occurs, it will lead to an expansion of the fault range of the entire circuit, affecting the stability and reliability of the system. Good short - circuit current resistance ability helps to ensure the stable operation of the relay in a complex electromagnetic environment without being interfered. Currently, the structural design of the moving contact part of the relay to resist short - circuit current is that one end of the moving contact piece is connected to one end of the moving contact lead - out piece, and the other end of the moving contact piece and the other end of the moving contact lead - out piece are in the same direction, that is, the moving contact piece and the moving contact lead - out piece are arranged side by side, so that the current direction flowing through the moving contact lead - out piece is opposite to the current direction flowing through the moving contact piece and they interact to generate a magnetic field. This magnetic field causes the moving contact piece to generate an electromagnetic force, and this electromagnetic force is in the contact - closing direction, opposite to the direction of the electro - dynamic repulsive force formed by the short - circuit current, thereby resisting the electro - dynamic repulsive force and preventing the contacts from being repelled.
[0004] In the prior art, in order to meet the contact gap, the swing amplitude of the moving contact piece is large. In order to make way for the moving contact piece, there is a large distance between the moving contact lead - out piece and the moving contact piece, resulting in poor short - circuit resistance ability of the moving contact part. Therefore, it is necessary to improve the structures of the existing moving contact piece and moving contact lead - out piece without affecting the swing amplitude of the moving contact piece, so as to maximize the short - circuit current resistance ability of the moving contact part. Summary of the Utility Model
[0005] The utility model aims at the technical problems existing in the prior art, and provides a moving contact part of a relay and an electromagnetic relay, which, without affecting the swing amplitude of the moving contact piece, improve the structure to achieve the purpose of enhancing the short - circuit current resistance ability.
[0006] The technical solution adopted by the present utility model to solve its technical problems is as follows: A moving contact part of a relay includes a moving contact lead piece, a moving contact, and a moving contact spring piece capable of elastic deformation. The moving contact is arranged on the moving contact spring piece. One end of the moving contact lead piece is connected to one end of the moving contact spring piece, and the other end of the moving contact lead piece and the other end of the moving contact spring piece extend on the same side. Moreover, the moving contact lead piece is located on the side of the moving contact spring piece in the thickness direction and away from the moving contact, such that the current direction flowing through the moving contact lead piece is opposite to the current direction flowing through the moving contact spring piece; a recessed part is provided on the moving contact lead piece corresponding to the other end of the moving contact spring piece, so that when the other end of the moving contact spring piece swings in place towards the side of the moving contact lead piece, at least a part of the other end of the moving contact spring piece enters the recessed part.
[0007] Further, the recessed part is a sunk groove provided on the side surface of the moving contact lead piece facing the moving contact spring piece.
[0008] Further, openings are respectively provided at both ends of the sunk groove in the width direction of the moving contact lead piece.
[0009] Further, the moving contact lead piece is in a Z shape, and the moving contact lead piece includes a first part, a second part, and a third part sequentially distributed in the direction from one end to the other end. The first part and the third part correspond to the two sides of the Z shape. The first part is connected to one end of the moving contact spring piece, the second part inclines towards the side away from the moving contact spring piece, and the recessed part is provided on the third part.
[0010] Further, the moving contact is arranged between the two ends of the moving contact spring piece, and the bending line between the second part and the third part is within the range where the moving contact is located in the length direction of the moving contact spring piece.
[0011] Further, a bent part protruding towards the side away from the moving contact lead piece is provided on the part of the moving contact spring piece between one end and the moving contact, and the bent part is in a U shape or a C shape; the bending line between the first part and the second part of the moving contact lead piece is within the range where the bent part is located in the length direction of the moving contact spring piece.
[0012] Further, the drop distance between the two ends of the moving contact lead piece is a first preset value, and when the moving contact spring piece swings in place towards the side of the moving contact lead piece, the drop distance between the two ends of the moving contact spring piece is a second preset value, and the first preset value is less than the second preset value.
[0013] Further, the included angle between the two ends of the moving contact spring piece in the restored state is less than 180°.
[0014] Further, the moving reed is formed by stacking a plurality of sub-reeds, and the moving reed and the moving reed lead-out piece are connected into a V-shaped or U-shaped structure; one end of the moving reed lead-out piece is provided with one or more convex columns on one side facing the moving reed, and the convex columns pass through the through holes provided at one end of the moving reed and are riveted and fixed to the moving reed by flattening or pressing.
[0015] The present utility model further provides an electromagnetic relay, including the moving reed part of the relay as described in the present utility model above.
[0016] Further, it further includes a base, a magnetic circuit part, a static reed part, and a pushing card. The static reed part includes a static reed and a static contact provided on the static reed. The static reed and the moving reed lead-out piece are respectively inserted into the base, and the static contact cooperates with the moving contact; the magnetic circuit part is arranged on the base, and the armature part of the magnetic circuit part is connected to the moving reed through the pushing card.
[0017] Compared with the prior art, the present utility model has the following beneficial effects:
[0018] 1. Since a recess is provided on the moving reed lead-out piece corresponding to the other end of the moving reed, and the recess is used to make way for the other end of the moving reed, when the moving reed swings to one side of the moving reed lead-out piece in place, at least part of the other end of the moving reed enters the recess. Therefore, in order to meet the contact gap, the relay does not need to leave a large distance between the moving reed lead-out piece and the moving reed, so that the moving reed lead-out piece can be ensured to be closer to the moving reed, reducing the area surrounded by the moving reed lead-out piece and the moving reed, and thus the short-circuit current resistance ability can be improved.
[0019] 2. As a preferred method, the recess is a sunk groove provided on the side surface of the moving reed lead-out piece facing the moving reed, which makes the processing of the recess more convenient, and makes the height difference value at both ends of the moving reed lead-out piece smaller, reducing the length of the second part of the moving reed lead-out piece, thus saving the material of the part and reducing the part cost.
[0020] 3. The moving contact is arranged between the two ends of the moving reed, and the bending line between the second part and the third part is within the range where the moving contact is located in the length direction of the moving reed, which helps to ensure a larger swing amplitude of the moving reed while further improving the closeness between the moving reed lead-out piece and the moving reed, so as to improve the short-circuit current resistance ability as much as possible.
[0021] The following further describes the present utility model in detail with reference to the drawings and embodiments; however, the moving reed part and the electromagnetic relay of a kind of relay of the present utility model are not limited to the embodiments. Description of the Drawings
[0022] Figure 1It is a three-dimensional structural schematic diagram of the moving spring part of the present utility model in the restored state of the moving spring piece;
[0023] Figure 2 It is a side view of the moving spring part of the present utility model in the restored state of the moving spring piece;
[0024] Figure 3 It is a three-dimensional structural schematic diagram of the moving spring lead-out piece of the present utility model;
[0025] Figure 4 It is a side view of the moving spring lead-out piece of the present utility model;
[0026] Figure 5 It is a side view of the moving spring piece (including the moving contact) of the present utility model;
[0027] Figure 6 It is a front view of one of the sub-spring pieces of the present utility model;
[0028] Figure 7 It is a side view of one of the sub-spring pieces of the moving spring piece of the present utility model in the restored state;
[0029] Figure 8 It is a cross-sectional view of the moving spring part of the present utility model when the moving spring piece swings to the side of the moving spring lead-out piece in place;
[0030] Figure 9 It is a three-dimensional structural schematic diagram (excluding the outer shell) of the electromagnetic relay of the present utility model;
[0031] Figure 10 It is a cross-sectional view (excluding the outer shell) of the electromagnetic relay of the present utility model;
[0032] In the figure, 1. Moving spring part, 11. Moving spring lead-out piece, 111. Sunk groove, 112. Convex column, 113. First part, 114. Second part, 115. Third part, 116 / 117. Bending line, 12. Moving spring piece, 121. Sub-spring piece, 122. Bending part, 123. Through hole, 13. Moving contact, 2. Pushing card, 3. Base, 4. Armature part, 41. Driving body, 42. Armature, 43. Permanent magnet, 5. Rotating shaft, 6. Coil part, 61. Coil holder, 62. Enameled wire, 63. Iron core, 64. Yoke iron, 7. Static spring part, 71. Static spring piece, 72. Static contact, 8. Outer shell. Detailed implementation manners
[0033] In the present utility model, for terms such as "first", "second", "third", etc., they are only used to distinguish similar objects, rather than to describe a specific order or sequence, nor can they be construed as indicating or implying relative importance. In the description, the orientation or positional relationship indicated by "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0034] In addition, in the description of the present utility model, unless otherwise specified, "a plurality of" means two or more. In the description of the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", etc. shall 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 directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0035] Please refer to Figures 1-8 As shown, a moving contact part of a relay of the present utility model includes a moving contact lead piece 11, a moving contact 13, and a movable spring piece 12 capable of elastic deformation. The moving contact 13 is arranged on the movable spring piece 12. One end of the moving contact lead piece 11 is connected to one end of the movable spring piece 12. The other end of the moving contact lead piece 11 and the other end of the movable spring piece 12 extend on the same side. And the moving contact lead piece 11 is located on the side of the movable spring piece 12 in the thickness direction and away from the moving contact 13, so that the current direction flowing through the moving contact lead piece 11 is opposite to the current direction flowing through the movable spring piece 12. A recess is provided on the moving contact lead piece 11 corresponding to the other end of the movable spring piece 12. By using this recess to make way for the other end of the movable spring piece 12, when the other end of the movable spring piece 12 swings to the side of the moving contact lead piece 11 in place, at least part of the other end of the movable spring piece 12 enters the recess.
[0036] In this embodiment, the recess is a sinking groove 111 provided on the side surface of the moving contact lead piece 11 facing the movable spring piece 12, and openings are respectively provided at both ends of the sinking groove 111 in the width direction of the moving contact lead piece 11. In other embodiments, the recess is formed by bending the corresponding part of the moving contact lead piece.
[0037] In this embodiment, the moving spring lead piece 11 is in a Z shape, and the moving spring lead piece 11 includes a first part 113, a second part 114, and a third part 115 that are sequentially distributed in the direction from one end to the other end. The first part 113 and the third part 115 correspond to the two sides of the Z shape. The first part 113 is connected to one end of the moving spring piece 12. The second part 114 is inclined away from the moving spring piece 12. The third part 115 is provided with a recess (i.e., the sinking groove 111).
[0038] In this embodiment, the moving contact 13 is arranged between the two ends of the moving spring piece 12. The bending line 116 between the second part 114 and the third part 115 of the moving spring lead piece 11 is within the range where the moving contact 13 is located in the length direction of the moving spring piece 12, as Figure 8 shown.
[0039] In this embodiment, a bent portion 122 protruding away from the moving spring lead piece 11 is provided on the part of the moving spring piece 12 between one end and the moving contact 13. The bent portion 122 is in a U shape, but is not limited thereto. In other embodiments, the bent portion is in a C shape. The bending line 117 between the first part 113 and the second part 114 of the moving spring lead piece 11 is within the range where the bent portion 122 is located in the length direction of the moving spring piece 12, as Figure 8 shown.
[0040] As Figure 5 shown, the drop distance between the two ends of the moving spring lead piece 11 is a first preset value A. As Figure 6 shown, when the moving spring piece 12 swings to one side of the moving spring lead piece 11 in place, the drop distance between the two ends of the moving spring piece 12 is a second preset value B. The first preset value A is less than the second preset value B. The included angle α between the two ends of the moving spring piece 12 in the restored state is less than 180°, as Figure 7 shown.
[0041] In this embodiment, the moving spring piece 12 is formed by stacking a plurality of sub-spring pieces 121, and the moving spring piece 12 and the moving spring lead piece 11 are connected into a V-shaped or U-shaped structure. One or more convex columns 112 are provided on the side of one end of the moving spring lead piece 11 facing the moving spring piece 12. The convex columns 112 pass through the through holes 123 provided at one end of the moving spring piece 12 and are riveted and fixed to the moving spring piece 12 by flanging or flattening. Specifically, the number of the convex columns 112 and the through holes 123 is three respectively, but is not limited thereto.
[0042] The utility model discloses a movable spring part of a relay, which makes use of a recessed portion (i.e., a sinking groove 111) of a movable spring lead-out piece 11 to give way to the other end of a movable spring piece 12, so that when the movable spring piece 12 is swung to one side of the movable spring lead-out piece 11 and is in place, the other end of the movable spring piece 12 enters the recessed portion (i.e., the sinking groove 111), and at the same time, the bending position of the movable spring lead-out piece 11 is limited, so that in order to meet the contact gap, the relay does not need to leave a large distance between the movable spring lead-out piece 11 and the movable spring piece 12, thereby ensuring that the movable spring lead-out piece 11 is closer to the movable spring piece 12, reducing the area surrounded by the movable spring piece 12 and the movable spring lead-out piece 11, and thus improving the short-circuit current resistance capability.
[0043] See also Figures 1-10 As shown, an electromagnetic relay of the utility model comprises a movable spring part 1, and the movable spring part 1 adopts the movable spring part of the relay of the utility model mentioned above.
[0044] The utility model also includes a base 3, a magnetic circuit part, a static spring part 7, and a push card 2. The static spring part 7 includes a static spring piece 71 and a static contact 72 arranged on the static spring piece 71. The static spring piece 71 and the dynamic spring lead-out piece 11 are respectively inserted into the base 3, and the static contact 72 cooperates with the dynamic contact 13. The magnetic circuit part is arranged on the base 3, and the armature part 4 of the magnetic circuit part is connected to the dynamic spring piece 12 through the push card 2.
[0045] In this embodiment, the armature part 4 specifically includes an insulated driving body 41 and an armature assembly arranged on the driving body 41, the armature assembly is in an I-shape, and its four ends extend out of the driving body 41 respectively. The driving body 41 is rotatably connected between the two surrounding walls 32 of the base 3 by a rotating shaft 5, and the bottom end of the driving body 41 is connected to the push card 2. The armature assembly specifically consists of two parallel armatures 42 and a permanent magnet 43 clamped between the two armatures 41. The magnetic circuit part also includes a coil part 6, the coil part 6 includes a coil frame 61, an enameled wire 62 wound around the coil frame 61, two yokes 64 and an iron core 63, the iron core 63 is inserted into the coil frame 61, the two yokes 64 are respectively in an L-shape, and one side of the two yokes 64 is riveted and fixed to the two ends of the iron core 63 respectively. The free ends of the two yokes 64 are respectively fitted in the recesses on both sides of the armature part 4, that is, the other side of one yoke 64 is fitted between the upper ends of the two armatures 42, and the other side of the other yoke 64 is fitted between the lower ends of the two armatures 42. Therefore, the utility model constitutes a magnetic latching relay, but is not limited thereto.
[0046] The present invention also includes a shell 8, the bottom end of which is connected to the base 3, and contains the static spring part 7, the dynamic spring part 1, the push card 2, the armature part 4, the coil part 6, etc. in its shell cavity.
[0047] The moving contact part of a relay and an electromagnetic relay of the present utility model, the parts not involved are the same as or can be implemented by using the prior art.
[0048] The above embodiments are only used to further illustrate the moving contact part of a relay and an electromagnetic relay of the present utility model, but the present utility model is not limited to the embodiments. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model shall fall within the protection scope of the technical solution of the present utility model.
Claims
1. The moving contact part of a relay, comprising a moving contact lead piece, a moving contact, and a moving contact spring piece capable of elastic deformation. The moving contact is arranged on the moving contact spring piece. One end of the moving contact lead piece is connected to one end of the moving contact spring piece, and the other end of the moving contact lead piece and the other end of the moving contact spring piece extend on the same side. Moreover, the moving contact lead piece is located on the side of the moving contact spring piece in the thickness direction and away from the moving contact, such that the current direction flowing through the moving contact lead piece is opposite to the current direction flowing through the moving contact spring piece; it is characterized in that: A recessed portion is provided on the moving contact spring lead corresponding to the other end of the moving contact spring, so that when the other end of the moving contact spring swings to the side of the moving contact spring lead and reaches the proper position, at least a part of the other end of the moving contact spring enters the recessed portion.
2. The moving contact part of the relay according to claim 1, characterized in that: The recessed portion is a sunk groove provided on the side surface of the moving contact spring lead facing the moving contact spring.
3. The moving contact part of the relay according to claim 2, characterized in that: Openings are respectively provided at both ends of the sunk groove in the width direction of the moving contact spring lead.
4. The moving contact part of the relay according to any one of claims 1-3, characterized in that: The moving contact spring lead is Z-shaped, and the moving contact spring lead includes a first part, a second part and a third part sequentially distributed from one end to the other end. The first part and the third part correspond to the two sides of the Z-shape. The first part is connected to one end of the moving contact spring. The second part is inclined away from the moving contact spring, and the third part is provided with the recessed portion.
5. The moving contact part of the relay according to claim 4, characterized in that: The moving contact is arranged between the two ends of the moving contact spring. The bending line between the second part and the third part is within the range where the moving contact is located in the length direction of the moving contact spring.
6. The moving contact part of the relay according to claim 4, characterized in that: A bent portion protruding away from the moving contact spring lead is provided on the part of the moving contact spring between one end thereof and the moving contact. The bent portion is U-shaped or C-shaped. The bending line between the first part and the second part of the moving contact spring lead is within the range where the bent portion is located in the length direction of the moving contact spring.
7. The moving contact part of the relay according to claim 4, characterized in that: The height difference distance between the two ends of the moving contact spring lead is a first preset value. When the moving contact spring swings to the side of the moving contact spring lead and reaches the proper position, the height difference distance between the two ends of the moving contact spring is a second preset value, and the first preset value is less than the second preset value.
8. The moving contact part of the relay according to any one of claims 1-3, characterized in that: The included angle between the two ends of the moving contact spring in the restored state is less than 180°.
9. The moving contact part of the relay according to claim 1, characterized in that: The moving contact spring is formed by stacking a plurality of sub-springs. The moving contact spring and the moving contact spring lead are connected into a V-shaped or U-shaped structure. One or more convex columns are provided on the side of one end of the moving contact spring lead facing the moving contact spring. The convex columns pass through the through holes provided at one end of the moving contact spring and are riveted and fixed to the moving contact spring by flanging or flattening.
10. An electromagnetic relay, characterized in that: It includes the moving contact spring part of the relay according to any one of claims 1-9.
11. The electromagnetic relay according to claim 10, characterized in that: It further includes a base, a magnetic circuit part, a static contact spring part, and a pushing card. The static contact spring part includes a static contact spring and a static contact provided on the static contact spring. The static contact spring and the moving contact spring lead are respectively inserted into the base, and the static contact is matched with the moving contact. The magnetic circuit part is arranged on the base, and the armature part of the magnetic circuit part is connected to the moving contact spring through the pushing card.