Relay

Abstract

The present invention discloses a relay. A coil is wound around a coil bobbin. A connecting plate is provided at the top of the coil bobbin. The coil bobbin forms a placement space. A connecting rod and an iron core are arranged in the placement space. The connecting rod passes through the connecting plate. The coil is connected with coil pins. A cover body is arranged on the connecting plate and forms an installation cavity. Part of the structure of the main lead-out end extends out of the installation cavity. The active reed is connected with the connecting rod. The connecting rod is used to push the active reed to abut against or disengage from the main lead-out end. The auxiliary moving reed is connected with the active reed. Part of the structure of the auxiliary pin extends out of the installation cavity. A coil lead-out end and an auxiliary lead-out end are arranged on a circuit board. The coil pins are connected with the coil lead-out end through the circuit board. The part of the structure of the auxiliary pin extending out of the installation cavity is connected with the circuit board. The auxiliary pin is connected with the auxiliary lead-out end through the circuit board. The connecting rod is used to push the auxiliary moving reed to abut against or disengage from the auxiliary pin.

Description

Technical Field

[0001] The present invention relates to the field of relays, and particularly to a relay. Background Art

[0002] For relay products, in order to monitor the opening and closing state of the main contacts of the relay, an additional set of auxiliary contacts is often added. The auxiliary contacts close when the main contacts close and open when the main contacts open, so that the opening and closing state of the main contacts can be judged by detecting the opening and closing conditions of the auxiliary contacts. In order to ensure sufficient electrical clearance and creepage distance, the auxiliary contacts need to be kept at a certain distance from the main contacts. Therefore, the auxiliary contacts need other lead-out methods to lead them out. Due to structural limitations, the lead-out structure of the existing auxiliary contacts is relatively complex and the connection reliability is poor. Summary of the Invention

[0003] The main object of the present invention is to provide a relay to solve the problems that the lead-out structure of the auxiliary contacts of the traditional relay is relatively complex and the connection reliability is poor.

[0004] To achieve the above object, the relay proposed by the present invention includes a bobbin, a cover body and a circuit board. Among them, a coil is wound on the bobbin, a connecting plate is provided at the top of the bobbin, a placement space is formed in the bobbin, a connecting rod and an iron core are arranged in the placement space, the connecting rod passes through the connecting plate, and the coil is connected with a coil pin; the cover body is arranged on the connecting plate and forms an installation cavity, an active reed, an auxiliary moving reed, a main lead-out end and an auxiliary pin are arranged in the installation cavity, a part of the structure of the main lead-out end extends out of the installation cavity, the active reed is connected with the connecting rod, and the connecting rod is used to push the active reed to abut or disengage from the main lead-out end, the auxiliary moving reed is connected with the active reed, and a part of the structure of the auxiliary pin extends out of the installation cavity; a coil lead-out end and an auxiliary lead-out end are arranged on the circuit board, the coil pin is connected with the coil lead-out end through the circuit board, a part of the structure of the auxiliary pin extending out of the installation cavity is connected with the circuit board, the auxiliary pin is connected with the auxiliary lead-out end through the circuit board, and the connecting rod is used to push the auxiliary moving reed to abut or disengage from the auxiliary pin.

[0005] Optionally, a first passage and a second passage that are not connected to each other are etched on the circuit board. Two ends of the first passage are respectively connected with the coil pin and the coil lead-out end, and two ends of the second passage are respectively connected with the auxiliary pin and the auxiliary lead-out end.

[0006] Optionally, two ends of the auxiliary pin are a connection end and an abutting end respectively. A connection hole is formed in the circuit board. A limiting protrusion is arranged on an outer wall of the auxiliary pin. The limiting protrusion is arranged close to the connection end. The connection end passes through the connection hole. The limiting protrusion abuts against the circuit board. The connecting rod is used to push the auxiliary moving reed to abut against or disengage from the abutting end.

[0007] Optionally, the auxiliary moving reed includes a connecting portion and a contacting portion which are connected to each other. The connecting portion is arranged in the vertical direction and a bottom end of the connecting portion is connected to the active reed. The contacting portion is arranged in the horizontal direction. A connection part between the connecting portion and the contacting portion is an arc surface. The contacting portion is used to abut against the abutting end.

[0008] Optionally, bumps are arranged at positions of the auxiliary lead-out end and the coil lead-out end close to the circuit board. The bumps abut against a top end of the circuit board.

[0009] Optionally, a bracket is arranged on the coil bobbin. The bracket extends along a direction close to the circuit board. A connection groove is arranged on the bracket. A partial structure of the coil pin is installed in the connection groove.

[0010] Optionally, a connection protrusion is arranged on the coil pin. The connection protrusion abuts against an edge of the bracket.

[0011] Optionally, the coil pin is provided with a mounting rod. A plurality of mounting grooves are arranged on the mounting rod. Each mounting groove is used for winding the coil.

[0012] Optionally, the relay further includes a mounting frame and a plurality of magnetic steels. The plurality of magnetic steels are distributed at intervals along an outer wall of the cover body. A plurality of pairs of mounting protrusions are arranged on the mounting frame. The plurality of magnetic steels and the plurality of pairs of mounting protrusions are arranged in one-to-one correspondence. Two ends of the magnetic steel are clamped with a corresponding pair of mounting protrusions.

[0013] Optionally, the relay further includes a fixing assembly. The fixing assembly includes a fixing frame, a fixing seat and a fixing plate. A bottom end of the fixing plate is connected to the connecting rod. The fixing seat is connected between the auxiliary moving reed and the fixing plate. A fixing space is formed between the fixing frame and the fixing plate. The active reed is placed in the fixing space.

[0014] Optionally, the relay further includes a magnetic conduction cylinder. The magnetic conduction cylinder forms a receiving cavity. The coil bobbin is received in the receiving cavity.

[0015] In the technical solution of the present invention, the coil serves as the driving part. When the coil is energized, an electromagnetic effect is generated. Under the action of the electromagnetic force, the iron core drives the connecting rod to move. The connecting rod pushes the active reed to abut against the main lead-out end, thereby realizing the abutment of the auxiliary reed and the auxiliary pin. When the coil is de-energized, the iron core drives the connecting rod to move, and the connecting rod pushes the active reed to disengage from the main lead-out end, thereby realizing the disengagement of the auxiliary reed and the auxiliary pin. The auxiliary contact closes with the closing of the main contact and opens with the opening of the main contact. The opening and closing state of the main contact is judged by detecting the opening and closing condition of the auxiliary contact. The auxiliary lead-out end is connected to the auxiliary pin through the circuit board to realize the lead-out of the auxiliary contact. The structure is simple and the connection reliability is strong. The coil lead-out end is also connected to the coil pin through the circuit board to realize the energization of the coil. The auxiliary lead-out end and the coil lead-out end are integrated on one circuit board, which can effectively ensure the relative position of the auxiliary lead-out end and the coil lead-out end, and the structures of the auxiliary lead-out end and the coil lead-out end are the same, reducing the number of materials and lowering the mold cost and material management cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0017] Figure 1 Schematic perspective view of a relay according to an embodiment of the present invention;

[0018] Figure 2 Schematic cross-sectional view of a relay according to an embodiment of the present invention;

[0019] Figure 3 Schematic connection structure diagram of the circuit board in a relay according to an embodiment of the present invention;

[0020] Figure 4 Schematic structure diagram of the auxiliary pin in a relay according to an embodiment of the present invention;

[0021] Figure 5 Schematic structure diagram of the bracket in a relay according to an embodiment of the present invention.

[0022] Explanation of the reference numerals in the drawings:

[0023]

[0024]

[0025] The realization of the object, functional features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the drawings. Detailed implementation manners

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0028] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0029] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0031] The present invention provides a relay.

[0032] In one embodiment, as Figures 1 to 5As shown, the relay 100 includes a coil frame 10, a cover 20 and a circuit board 30, wherein a coil 11 is wound on the coil frame 10, a connecting plate 12 is arranged on the top of the coil frame 10, and a placement space 13 is formed on the coil frame 10, a connecting rod 14 and an iron core 15 are arranged in the placement space 13, the connecting rod 14 passes through the connecting plate 12, and the coil 11 is connected to a coil pin 16; the cover 20 is arranged on the connecting plate 12 and forms a mounting cavity 21, and an active spring 22, an auxiliary active spring 23, a main lead-out terminal 24 and an auxiliary pin 33 are arranged in the mounting cavity 21, a part of the structure of the main lead-out terminal 24 extends out of the mounting cavity 21, and the active spring 22, an auxiliary active spring 23, a main lead-out terminal 24 and an auxiliary pin 33 are arranged in the mounting cavity 21, and a part of the structure of the main lead-out terminal 24 extends out of the mounting cavity 21, and the active spring 22, an auxiliary active spring 23, a main lead-out terminal 24 and an auxiliary pin 33 are arranged in the mounting cavity 21. 22 is connected to the connecting rod 14, the connecting rod 14 is used to push the active spring 22 to abut or disengage from the main lead-out terminal 24, the auxiliary moving spring 23 is connected to the active spring 22, and part of the auxiliary pin 33 extends out of the mounting cavity 21; the circuit board 30 is provided with a coil lead-out terminal 31 and an auxiliary lead-out terminal 32, the coil pin 16 is connected to the coil lead-out terminal 31 through the circuit board 30, the part of the auxiliary pin 33 extending out of the mounting cavity 21 is connected to the circuit board 30, the auxiliary pin 33 is connected to the auxiliary lead-out terminal 32 through the circuit board 30, and the connecting rod 14 is used to push the auxiliary moving spring 23 to abut or disengage from the auxiliary pin 33.

[0033] Please refer to Figures 1 to 3 , the coil 11 is wound on the coil frame 10, and the coil frame 10 is used to install the coil 11. A placement space 13 is formed in the middle of the coil frame 10, and the iron core 15 is placed in the placement space 13. The connecting rod 14 is located in the middle of the iron core 15. When the coil 11 is energized, a magnetic field is formed in the placement space 13, and the iron core 15 drives the connecting rod 14 to move upward under the action of the magnetic field; when the coil 11 is de-energized, the iron core 15 drives the connecting rod 14 to move downward. The circuit board 30 is located above the cover body 20, and the circuit board 30 is provided with a coil lead-out terminal 31, which is used to energize the coil 11. The coil lead-out terminal 31 is connected to the coil pin 16 through the circuit board 30, and the coil pin 16 is connected to the coil 11, so that the coil 11 is energized to generate an electromagnetic effect.

[0034] The cover body 20 and the connecting plate 12 form an installation cavity 21. A part of the structure of the main lead-out end 24 extends out of the installation cavity 21, so that the main lead-out end 24 can be directly connected to an external copper bar, terminal, etc. The bottom end of the active reed 22 is connected to the connecting rod 14. When the connecting rod 14 moves upward, it pushes the active reed 22 to abut against the main lead-out end 24, thereby closing the main contact; when the connecting rod 14 moves downward, it drives the active reed 22 to disengage from the main lead-out end 24, thereby opening the main contact. The auxiliary moving reed 23 is connected to the active reed 22, so that the auxiliary moving reed 23 moves along with the active reed 22. The bottom end of the circuit board 30 is connected with an auxiliary pin 33, and the auxiliary pin 33 extends in the direction close to the connecting plate 12, that is, downward. When the active reed 22 moves upward, it drives the auxiliary moving reed 23 to move upward, so that the auxiliary moving reed 23 abuts against the auxiliary pin 33, thereby closing the auxiliary contact along with the closing of the main contact; when the active reed 22 moves downward, it drives the auxiliary moving reed 23 to move downward, so that the auxiliary moving reed 23 disengages from the auxiliary pin 33, thereby opening the auxiliary contact along with the opening of the main contact.

[0035] In this embodiment, the coil 11 serves as a driving part. When the coil 11 is energized, an electromagnetic effect is generated. Under the action of the electromagnetic force, the iron core 15 drives the connecting rod 14 to move upward. The connecting rod 14 pushes the active reed 22 to abut against the main lead-out end 24, thereby enabling the auxiliary moving reed 23 to abut against the auxiliary pin 33. When the coil 11 is de-energized, the iron core 15 drives the connecting rod 14 to move downward. The connecting rod 14 pushes the active reed 22 to disengage from the main lead-out end 24, thereby enabling the auxiliary moving reed 23 to disengage from the auxiliary pin 33. The auxiliary contact closes along with the closing of the main contact and opens along with the opening of the main contact. The opening and closing state of the main contact is judged by detecting the opening and closing conditions of the auxiliary contact. The auxiliary lead-out end 32 is connected to the auxiliary pin 33 through the circuit board 30 to realize the lead-out of the auxiliary contact. The structure is simple and the connection reliability is strong. The coil lead-out end 31 is also connected to the coil pin 16 through the circuit board 30 to energize the coil 11. Gathering the auxiliary lead-out end 32 and the coil lead-out end 31 on one circuit board 30 can effectively ensure the relative positions of the auxiliary lead-out end 32 and the coil lead-out end 31, and the structures of the auxiliary lead-out end 32 and the coil lead-out end 31 are the same, reducing the number of materials and lowering the die cost and material management cost.

[0036] In the preferred technical solution, a spring is connected between the connecting rod 14 and the active reed 22. When the coil 11 is de-energized, the spring pushes the iron core 15 to move downward. The iron core 15 drives the connecting rod 14 to move downward. The connecting rod 14 pushes the active reed 22 to disengage from the main lead-out end 24, thereby enabling the auxiliary moving reed 23 to disengage from the auxiliary pin 33.

[0037] In one embodiment, a first path 35 and a second path 36 that are not connected to each other are etched on the circuit board 30. Two ends of the first path 35 are respectively connected to the coil pin 16 and the coil lead-out end 31, and two ends of the second path 36 are respectively connected to the auxiliary pin 33 and the auxiliary lead-out end 32.

[0038] Please refer to Figures 1 to 3 , the first path 35 and the second path 36 are not connected to each other, so as to avoid interference between the first path 35 and the second path 36. One end of the first path 35 is connected to the coil pin 16, realizing the connection between the circuit board 30 and the coil pin 16. The other end of the first path 35 is connected to the coil lead-out end 31, realizing the connection between the circuit board 30 and the coil lead-out end 31, so as to realize the connection between the coil lead-out end 31 and the coil pin 16 through the circuit board 30. One end of the second path 36 is connected to the auxiliary pin 33, realizing the connection between the circuit board 30 and the auxiliary pin 33. The other end of the second path 36 is connected to the auxiliary lead-out end 32, realizing the connection between the circuit board 30 and the auxiliary lead-out end 32, so as to realize the connection between the auxiliary lead-out end 32 and the auxiliary pin 33 through the circuit board 30.

[0039] In one embodiment, two ends of the auxiliary pin 33 are respectively a connection end 331 and an abutting end 332. A connection hole 34 is formed on the circuit board 30. A limiting protrusion 333 is arranged on the outer wall of the auxiliary pin 33. The limiting protrusion 333 is arranged close to the connection end 331. The connection end 331 passes through the connection hole 34, and the limiting protrusion 333 abuts against the circuit board 30. The connecting rod 14 is used to push the auxiliary moving reed 23 to abut against or disengage from the abutting end 332.

[0040] Please refer to Figures 1 to 4 , the top end of the auxiliary pin 33 is the connection end 331, and the bottom end of the auxiliary pin 33 is the abutting end 332. The circuit board 30 is provided with a connection hole 34, and the connection end 331 passes through the connection hole 34 to realize the connection between the auxiliary pin 33 and the circuit board 30. A limiting protrusion 333 is arranged at a position of the auxiliary pin 33 close to the connection end 331. The top end of the limiting protrusion 333 abuts against the bottom end of the circuit board 30. The limiting protrusion 333 plays a role in limiting the circuit board 30 to prevent the circuit board 30 from moving downward. Moreover, the limiting protrusion 333 increases the contact area between the auxiliary pin 33 and the circuit board 30, making the connection between the circuit board 30 and the auxiliary pin 33 stable and firm. The connecting rod 14 pushes the auxiliary moving reed 23 to abut against or disengage from the abutting end 332, realizing the abutting or disengagement between the auxiliary moving reed 23 and the auxiliary pin 33, so as to realize the closing or opening of the auxiliary contact.

[0041] In one embodiment, the auxiliary moving reed 23 includes a connecting portion 231 and a contacting portion 232 that are connected to each other. The connecting portion 231 is arranged in the vertical direction, and the bottom end of the connecting portion 231 is connected to the active reed 22. The contacting portion 232 is arranged in the horizontal direction. The connection between the connecting portion 231 and the contacting portion 232 is an arc surface. The contacting portion 232 is used to abut against the abutting end 332.

[0042] Please refer to Figures 1 to 4 , the bottom end of the connecting portion 231 is connected to the active reed 22, thereby realizing the connection between the auxiliary moving reed 23 and the active reed 22. The connecting portion 231 is arranged in the vertical direction to reduce the space occupied by the auxiliary moving reed 23 and also facilitate the connection with the active reed 22. The contacting portion 232 is used to abut against the abutting end 332, thereby realizing that the connecting rod 14 is used to push the auxiliary moving reed 23 to abut against or disengage from the auxiliary pin 33. By detecting the opening and closing conditions of the auxiliary contact, the opening and closing state of the main contact is judged. The contacting portion 232 is arranged in the horizontal direction, increasing the contact area between the auxiliary moving reed 23 and the auxiliary pin 33, facilitating the closing and opening of the auxiliary contact, and thus realizing the improvement of the accuracy of the detection result. The connection between the connecting portion 231 and the contacting portion 232 is an arc surface, which can absorb mechanical kinetic energy and improve the service life of the auxiliary moving reed 23.

[0043] In one embodiment, bumps 37 are provided at positions where the auxiliary lead-out end 32 and the coil lead-out end 31 are close to the circuit board 30, and the bumps 37 abut against the top end of the circuit board 30.

[0044] Please refer to Figures 1 to 3 , bumps 37 are provided at positions where the auxiliary lead-out end 32 and the coil lead-out end 31 are close to their bottom ends, and the bottom ends of the bumps 37 abut against the top end of the circuit board 30. The bumps 37 play a limiting role on the circuit board 30 to prevent the circuit board 30 from moving upward. The bumps 37 extend in the horizontal direction, increasing the contact area between the auxiliary lead-out end 32 and the circuit board 30, making the connection between the circuit board 30 and the auxiliary lead-out end 32 stable and firm. At the same time, the setting of the bumps 37 also increases the contact area between the coil lead-out end 31 and the circuit board 30, making the connection between the circuit board 30 and the coil lead-out end 31 stable and firm.

[0045] In one embodiment, a bracket 17 is provided on the coil bobbin 10. The bracket 17 extends in the direction close to the circuit board 30, and a connection groove 171 is provided on the bracket 17. A partial structure of the coil pin 16 is installed in the connection groove 171.

[0046] Please refer to Figures 1 to 5, the bottom end of the support 17 is connected to the bobbin 10. The support 17 extends in the direction close to the circuit board 30, that is, the support 17 extends upward. A connection groove 171 is provided in the middle of the support 17. A part of the mechanism below the coil lead 16 is installed in the connection groove 171 to realize the connection between the coil lead 16 and the support 17, thereby realizing the connection between the coil lead 16 and the bobbin 10. The upper part of the coil lead 16 extends out of the connection groove 171, and the top end of the coil lead 16 is connected to the circuit board 30. The support 17 is provided for installing the coil lead 16, so that the position of the coil lead 16 is fixed, and the connection between the coil 11 and the coil lead 16 is more stable. The connection groove 171 makes the connection between the coil lead 16 and the support 17 more stable and firm, improving the structural stability of the relay 100.

[0047] In an embodiment, a connection protrusion 161 is provided on the coil lead 16, and the connection protrusion 161 abuts against the edge of the support 17.

[0048] Please refer to Figure 5 , a connection protrusion 161 is provided in the middle of the coil lead 16, and the bottom end of the connection protrusion 161 abuts against the top end of the support 17. The connection protrusion 161 is provided to prevent the lower part of the coil lead 16 from extending into the connection groove 171 too much, resulting in insufficient upper part of the coil lead 16 to be connected to the circuit board 30. The connection protrusion 161 plays a limiting role. At the same time, the connection protrusion 161 also makes the connection between the coil lead 16 and the support 17 tighter.

[0049] The upper part of the coil lead 16 is connected to the circuit board 30, playing a limiting role for the circuit board 30. The entire coil lead 16 integrates the limiting support of the circuit board 30 and the installation of the coil 11, simplifying the structure of the relay 100 and saving internal space.

[0050] In an embodiment, the coil lead 16 is provided with a mounting rod 162, and a plurality of mounting grooves 163 are provided on the mounting rod 162, and each mounting groove 163 is used for winding the coil 11.

[0051] Please refer to Figures 1 to 3 , the bottom end of the coil lead 16 is provided with a mounting rod 162, and a plurality of mounting grooves 163 are provided on the mounting rod 162. The coil 11 is wound on the plurality of mounting grooves 163, thereby realizing the connection between the coil 11 and the coil lead 16. The mounting rod 162 is arranged horizontally, facilitating the winding of the coil 11 on the plurality of mounting grooves 163, making the connection between the coil 11 and the coil lead 16 more stable and firm, thereby improving the stability of the coil 11 when energized and extending the service life of the relay 100.

[0052] In one embodiment, the relay 100 further includes a mounting bracket 40 and a plurality of permanent magnets 50. The plurality of permanent magnets 50 are spaced apart along the outer wall of the cover 20. A plurality of pairs of mounting protrusions 41 are provided on the mounting bracket 40. The plurality of permanent magnets 50 are provided in one-to-one correspondence with the plurality of pairs of mounting protrusions 41. Both ends of the permanent magnet 50 are snap-connected to a corresponding pair of mounting protrusions 41.

[0053] Please refer to Figure 1 When the relay 100 is applied to a relatively high load, a mass of gas with extremely high temperature, extremely strong brightness and electrical conductivity will be generated between the active reed 22 and the main lead-out terminal 24, which is called an arc. If the arc hits the plastic around the active reed 22 and the main lead-out terminal 24, the plastic will be carbonized, and the insulation will drop sharply. In severe cases, it may even cause the relay 100 to burn out. The permanent magnet 50 is used to blow out the arc, playing a protective role, improving the reliability of the relay 100 and extending the service life of the relay 100. The number of the permanent magnets 50 is plural, so that the effect of the permanent magnet 50 blowing out the arc is better, thereby further improving the reliability of the relay 100.

[0054] The mounting bracket 40 is used to mount the permanent magnet 50, so that the position of the permanent magnet 50 is fixed, so that the permanent magnet 50 can blow out the arc more stably, making the relay 100 more reliable. A plurality of pairs of mounting protrusions 41 are provided on the mounting bracket 40. The plurality of permanent magnets 50 are provided in one-to-one correspondence with the plurality of pairs of mounting protrusions 41. Each pair of mounting protrusions 41 are spaced apart in the up-down direction. The upper and lower ends of the permanent magnet 50 are snap-connected to a corresponding pair of mounting protrusions 41, making the connection between the mounting bracket 40 and the permanent magnet 50 stable and firm, so that the position of the permanent magnet 50 is fixed, improving the reliability of the relay 100 and extending the service life of the relay 100.

[0055] In one embodiment, the relay 100 further includes a fixing assembly 60. The fixing assembly 60 includes a fixing frame 61, a fixing seat 62 and a fixing plate 63. The bottom end of the fixing plate 63 is connected to the connecting rod 14. The fixing seat 62 is connected between the auxiliary moving reed 23 and the fixing plate 63. A fixing space 64 is formed between the fixing frame 61 and the fixing plate 63. The active reed 22 is placed in the fixing space 64.

[0056] Please refer to Figures 1 to 3, the bottom end of the fixing plate 63 is connected to the connecting rod 14, and the top end of the fixing plate 63 is connected to the bottom end of the active reed 22, thereby realizing the connection between the connecting rod 14 and the active reed 22. The fixing seat 62 is used to install the auxiliary moving reed 23, making the connection between the auxiliary moving reed 23 and the fixing plate 63 more stable, thereby realizing the close connection between the auxiliary moving reed 23 and the active reed 22, enabling the auxiliary moving reed 23 to move along with the movement of the active reed 22, and improving the accuracy of the detection result. The fixing space 64 is used to place the active reed 22, enabling the active reed 22 to move stably along with the movement of the connecting rod 14, and improving the reliability of the relay 100.

[0057] In one embodiment, please refer to Figures 1 to 2 , the relay 100 further includes a magnetic guide cylinder 70, and the magnetic guide cylinder 70 is formed with a receiving cavity 71, and the coil holder 10 is received in the receiving cavity 71. The setting of the magnetic guide cylinder 70 can enhance the magnetic field intensity and improve the reliability of the relay 100.

[0058] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A relay, characterized in that, The relay includes: A bobbin on which a coil is wound. A connecting plate is provided at the top of the bobbin. The bobbin forms a placement space, in which a connecting rod and an iron core are provided. The connecting rod passes through the connecting plate, and the coil is connected with coil pins. A cover body which is arranged on the connecting plate and forms an installation cavity. An active reed, an auxiliary moving reed, a main lead-out terminal and an auxiliary pin are arranged in the installation cavity. A part of the structure of the main lead-out terminal extends out of the installation cavity. The active reed is connected with the connecting rod, and the connecting rod is used to push the active reed to abut or disengage from the main lead-out terminal. The auxiliary moving reed is connected with the active reed, and a part of the structure of the auxiliary pin extends out of the installation cavity. A circuit board on which a coil lead-out terminal and an auxiliary lead-out terminal are provided. The coil pins are connected with the coil lead-out terminal through the circuit board. The part of the structure of the auxiliary pin extending out of the installation cavity is connected with the circuit board, and the auxiliary pin is connected with the auxiliary lead-out terminal through the circuit board. The connecting rod is used to push the auxiliary moving reed to abut or disengage from the auxiliary pin.

2. The relay according to claim 1, characterized in that, A first path and a second path which are not connected to each other are etched on the circuit board. Two ends of the first path are respectively connected with the coil pins and the coil lead-out terminal, and two ends of the second path are respectively connected with the auxiliary pin and the auxiliary lead-out terminal.

3. The relay according to claim 1, wherein Two ends of the auxiliary pin are respectively a connection end and an abutting end. A connection hole is formed on the circuit board. A limiting protrusion is arranged on the outer wall of the auxiliary pin and is arranged close to the connection end. The connection end passes through the connection hole, and the limiting protrusion abuts against the circuit board. The connecting rod is used to push the auxiliary moving reed to abut or disengage from the abutting end.

4. The relay according to claim 3, wherein The auxiliary moving reed includes a connecting part and a contact part which are connected with each other. The connecting part is arranged in the vertical direction and the bottom end of the connecting part is connected with the active reed. The contact part is arranged in the horizontal direction. The connection part and the contact part are connected at an arc surface. The contact part is used to abut against the abutting end.

5. The relay according to claim 1, wherein, Lugs are arranged at positions of the auxiliary lead-out terminal and the coil lead-out terminal close to the circuit board, and the lugs abut against the top end of the circuit board.

6. The relay according to any one of claims 1-5, characterized in that, A bracket is arranged on the bobbin and extends along the direction close to the circuit board. A connection groove is arranged on the bracket, and a part of the structure of the coil pins is installed in the connection groove.

7. The relay according to claim 6, characterized in that, A connection protrusion is arranged on the coil pins, and the connection protrusion abuts against the edge of the bracket.

8. The relay according to any one of claims 1-5, characterized in that, The coil pins are provided with mounting rods, and a plurality of mounting grooves are arranged on the mounting rods. Each mounting groove is used for winding the coil.

9. The relay according to any one of claims 1-5, characterized in that, The relay further includes a mounting frame and a plurality of magnets. The plurality of magnets are distributed at intervals along the outer wall of the cover body. A plurality of pairs of mounting protrusions are arranged on the mounting frame. The plurality of magnets are arranged in one-to-one correspondence with the plurality of pairs of mounting protrusions, and two ends of the magnets are clamped with a corresponding pair of mounting protrusions.

10. The relay according to any one of claims 1-5, characterized in that, The relay further includes a fixing component, the fixing component includes a fixing frame, a fixing seat and a fixing plate, the bottom end of the fixing plate is connected to the connecting rod, the fixing seat is connected between the auxiliary moving reed and the fixing plate, a fixing space is formed between the fixing frame and the fixing plate, and the active reed is placed in the fixing space; and / or, The relay further includes a magnetic conducting cylinder, the magnetic conducting cylinder forms a receiving cavity, and the coil holder is received in the receiving cavity.

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