Relay

Abstract

The utility model discloses a relay, which comprises a cover body, a magnetic pole piece and an upper armature assembly, the magnetic pole piece is hermetically connected to the cover body, and the upper armature assembly is accommodated in the cover body; the upper armature assembly comprises an armature frame, an insulating part fixedly arranged at the bottom of the armature frame and an elastic part fixedly arranged at the top of the armature frame, the armature frame is supported on the magnetic pole piece through the insulating part, and the cover body is used for pressing the armature frame through the elastic part. The armature frame of the relay is supported on the magnetic pole piece through the insulating piece, and the cover body is used for pressing the armature frame through the elastic piece, so that the armature frame is installed and fixed, brazing and bonding processes are not needed in the mode, the production takt is shortened, the production efficiency is improved, and the anti-short-circuit performance of a product is ensured; the air leakage risk of thin wall damage caused by riveting is eliminated, and the risk of high-low voltage breakdown is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric control devices, in particular to a relay. Background Art

[0002] With the rapid development of new energy electric vehicles, the market demand for rated voltage and current of high-voltage DC relays is getting higher and higher. When a large current passes through the contacts of a high-voltage DC relay, especially when a short-circuit current occurs, due to electromagnetic effects, the contacts will be subject to Holm force and Lorentz force, the so-called electromotive repulsion; when the electromotive repulsion is greater than the supporting force between the contacts, the moving and static contacts will be repelled apart, generating a high-energy arc, causing the DC relay to fail, adhere, or even explode.

[0003] Therefore, it is very important to set up an anti-short circuit structure in the high-voltage DC relay. It is an important structure to ensure that the contacts are not repelled when carrying a large current. The common anti-short circuit structure is generally arranged in the form of two armatures on both sides of the contact, in which the lower armature is fixed together with the moving contact piece, and the upper armature is fixed separately and maintains a certain gap with the lower armature. The principle is: when the contacts are energized, the generated annular magnetic field magnetizes the upper armature and the lower armature, so that the upper armature and the lower armature generate a magnetic attraction. Since the upper armature is fixed, the lower armature will be attracted by the upper armature, so it can provide an upward compensation force to the moving contact piece, so that the contact pressure increases, thereby preventing the moving contact piece from being repelled.

[0004] At present, there are generally two ways to fix the upper armature: one is to fix the upper armature support on the pole piece through a metal armature frame. This solution has the risk of high and low voltage breakdown, and the riveting of the armature frame and the pole piece is prone to cause leakage at the riveting position of the pole piece; the other solution is to braze or bond the upper armature to the ceramic cover. This solution requires brazing and bonding processes, which is difficult to operate and has a high risk of falling off. In addition, the height size of the ceramic cover is difficult to control, and the distance between the armatures is difficult to control, which affects the product's anti-short circuit performance. Therefore, it is necessary to improve the existing technology to overcome the defects in the existing technology. Summary of the invention

[0005] The problem to be solved by the utility model is to provide a relay to overcome the defects of the upper armature installation structure of the existing relay, such as the risk of high and low voltage breakdown, easy leakage and complex process.

[0006] The utility model adopts the following technical solution to solve the technical problem: a relay, comprising: a cover body, a magnetic pole piece and an upper armature assembly, wherein the magnetic pole piece is sealed and connected to the cover body, and the upper armature assembly is accommodated in the cover body; the upper armature assembly comprises an armature frame, an insulating member fixed to the bottom of the armature frame, and an elastic member fixed to the top of the armature frame, the armature frame is supported on the magnetic pole piece by the insulating member, and the cover body is used to press the armature frame by the elastic member.

[0007] As a further improvement of the present invention, the elastic member is a spring sheet integrally stamped by the armature frame and warped upward on the top surface of the armature frame, and the elastic member elastically abuts against the inner wall of the cover body to limit the movement of the armature frame in the vertical direction.

[0008] As a further improvement of the present invention, the elastic member is a spring sheet that is a separate structure from the armature frame. The elastic member is fixed to the armature frame by any one of riveting, welding, and bolting. The elastic member elastically abuts against the inner wall of the cover body to limit the movement of the armature frame in the vertical direction.

[0009] As a further improvement of the present invention, the elastic member is provided with a connecting portion connected to the armature frame and an extending portion extending upward and bent from one end of the connecting portion, and the extending portion protrudes from the top surface of the armature frame.

[0010] As a further improvement of the present invention, the pole piece is provided with a first positioning feature on the side facing the upper armature assembly, and the insulating member is provided with a second positioning feature matching the first positioning feature, and the first positioning feature and the second positioning feature are used in conjunction to limit the movement of the insulating member along the direction of the plane where the pole piece is located.

[0011] As a further improvement of the present invention, one of the first positioning feature and the second positioning feature is a positioning boss, and the other is a positioning groove matching the positioning boss, and the positioning boss is plug-fitted with the positioning groove.

[0012] As a further improvement of the utility model, the armature frame is provided with two support plates distributed in the vertical direction and a mounting plate integrally connected to the upper ends of the two support plates, and an upper armature is fixed to the bottom of the mounting plate; two insulating parts are provided, which are respectively integrally injection molded at the lower ends of the two support plates.

[0013] As a further improvement of the present invention, the relay also includes a moving contact assembly, and the armature frame is mounted on the outside of the moving contact assembly; the moving contact assembly includes a moving contact piece, a lower armature and a support frame, the moving contact piece is inserted into the support frame and leans upward against the top wall of the support frame, the lower armature is upwardly clamped on the bottom of the moving contact piece, and the two ends of the lower armature extend upward through the two sides of the support frame and are arranged opposite to the upper armature.

[0014] As a further improvement of the utility model, both sides of the support frame are provided with limiting parts protruding in directions opposite to each other, and the inner sides of the two support plates are provided with limiting surfaces opposite to the limiting parts in the vertical direction, and the limiting parts are used in conjunction with the limiting surfaces to limit the rotational movement of the movable contact assembly.

[0015] As a further improvement of the utility model, both sides of the support frame are provided with limiting parts protruding in directions opposite to each other, and the inner walls on both sides of the cover body are provided with limiting ribs opposite to the limiting parts along the vertical direction, and the limiting parts and the limiting ribs are used together to limit the rotational movement of the movable contact assembly.

[0016] The beneficial effect of the utility model is as follows: the utility model provides a relay, in which an elastic part is fixedly provided on the top of the armature frame, and an insulating part is fixedly provided on the bottom of the armature frame, the armature frame is supported on the magnetic pole piece by the insulating part, and the armature frame is pressed against the magnetic pole piece by the cover body through the elastic part, so as to realize the installation and fixation of the armature frame, and this method does not require brazing and bonding processes, and the armature frame can be directly pressed against the magnetic pole piece by the cover body through the elastic part, thereby shortening the production cycle and accelerating the production efficiency, and the height dimensional accuracy requirements of the cover body are not high, and the distance between the upper armature and the lower armature can be accurately controlled to ensure the product's anti-short circuit performance; at the same time, the armature frame is supported on the magnetic pole piece by the insulating part, and no riveting process is required, thereby eliminating the risk of air leakage caused by thin wall damage due to riveting, further simplifying the production process, and effectively avoiding the risk of high and low voltage breakdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the first embodiment of the relay of the utility model;

[0018] Figure 2 It is a cross-sectional view of the first embodiment of the relay of the utility model;

[0019] Figure 3 This is a three-dimensional diagram of the relay embodiment 1 of the utility model without the cover;

[0020] Figure 4 It is a three-dimensional diagram of the upper armature assembly of the first embodiment of the relay of the utility model;

[0021] Figure 5This is an exploded view of the upper armature assembly of the first embodiment of the relay of the utility model;

[0022] Figure 6 A three-dimensional diagram of a magnetic pole piece of a relay embodiment 1 of the utility model;

[0023] Figure 7 It is a sectional stereoscopic diagram of the assembly of the magnetic pole piece and the upper armature assembly of the first embodiment of the relay of the utility model;

[0024] Figure 8 It is a three-dimensional diagram of the moving contact assembly of the first embodiment of the relay of the utility model;

[0025] Fig. 9 It is a three-dimensional diagram of the cover body of the first embodiment of the relay of the utility model;

[0026] Fig.10 This is a three-dimensional diagram of the second embodiment of the relay of the utility model without the cover;

[0027] Fig.11 It is a three-dimensional diagram of the upper armature assembly of the second embodiment of the relay of the utility model;

[0028] Fig.12 It is a three-dimensional diagram of the upper armature assembly of the third embodiment of the relay of the utility model;

[0029] Fig.13 It is a three-dimensional diagram of the upper armature assembly of the fourth embodiment of the relay of the utility model;

[0030] Fig.14 It is a three-dimensional diagram of the upper armature assembly of the fifth embodiment of the relay of the utility model;

[0031] Fig.15 It is a three-dimensional diagram of the armature frame of the sixth embodiment of the relay of the utility model.

[0032] Combined with the accompanying drawings, the following description is given:

[0033] 1. Cover body; 101. Limiting rib; 2. Pole piece; 201. Positioning boss; 3. Armature frame; 301. Support plate; 3011. Limiting surface; 3012. Raised portion; 3013. Through hole; 302. Mounting plate; 4. Insulator; 401. Positioning groove; 5. Elastic member; 501. Connecting portion; 502. Extending portion; 6. Upper armature; 7. Moving contact piece; 8. Lower armature; 9. Support frame; 901. Limiting portion; 10. Static contact; 11. Connecting ring; 12. Insulating base; 13. Push rod; 14. Contact spring; 15. Static iron core; 16. Moving iron core; 17. Sleeve. DETAILED DESCRIPTION

[0034] Several preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] Embodiment 1

[0036] See also Figures 1 to 9 The utility model provides a relay, comprising: a cover 1, a magnetic pole piece 2 and an upper armature assembly. Optionally, the cover 1 is a rectangular structure with a top and no bottom and a cavity inside. The material of the cover 1 has insulating properties, and the material can be ceramic or insulating plastic. The bottom of the cover 1 can be sealed and connected to the magnetic pole piece 2 through a connecting ring 11, and the upper armature assembly is accommodated in the cover 1 and is located above the magnetic pole piece 2.

[0037] Among them, the upper armature assembly includes an armature frame 3, an insulating member 4 fixed to the bottom of the armature frame 3, and an elastic member 5 fixed to the top of the armature frame 3. The armature frame 3 is supported on the pole piece 2 by the insulating member 4, and the cover body 1 is used to press the armature frame 3 through the elastic member 5, so as to realize the installation and fixation of the armature frame 3. This method does not require brazing and bonding processes. The armature frame 3 can be directly pressed on the pole piece 2 by the cover body 1 through the elastic member 5. The production process is simple, and the height dimensional accuracy of the cover body 1 is not required. The distance between the upper armature 6 and the lower armature 8 can be accurately controlled to ensure the product's anti-short circuit performance; at the same time, the armature frame 3 is supported on the pole piece 2 by the insulating member 4, and no riveting process is required, which eliminates the risk of air leakage caused by thin wall damage due to riveting, further simplifies the production process, and effectively avoids the risk of high and low voltage breakdown.

[0038] Furthermore, the shape of the armature frame 3 can be but not limited to an inverted U-shape, and it is provided with two support plates 301 distributed in the vertical direction and opposite to each other, and a horizontally distributed mounting plate 302 integrally connected to the upper ends of the two support plates 301, and the upper armature 6 is fixed to the bottom of the mounting plate 302, and the fixing method between the two can be riveted. In the present utility model, the direction of movement of the push rod 13 is defined as the vertical direction.

[0039] See also Figure 4 and Figure 5 There are two insulating members 4, and their shapes can be, but are not limited to, rectangular. The insulating members 4 are made of insulating materials, such as insulating plastic. The two insulating members 4 are respectively integrally injection molded at the lower ends of the two support plates 301. This method can reduce the number of parts and the difficulty of forming parts, save costs, and ensure the dimensional accuracy of the upper armature assembly. Among them, the parts of the lower ends of the two support plates 301 that are wrapped by the insulating members 4 are also provided with through holes 3013, which are used to improve the bonding force between the armature frame 3 and the insulating members 4 during injection molding.

[0040] In addition, a positioning structure is provided between the two insulating members 4 and the magnetic pole piece 2 for positioning the insulating members 4 to limit the movement of the upper armature assembly along the direction of the plane where the magnetic pole piece 2 is located.

[0041] Specifically, Figures 5 to 7As shown, a first positioning feature is provided on the side of the pole piece 2 facing the upper armature assembly, and a second positioning feature matching the first positioning feature is provided at the bottom of the insulating member 4. The first positioning feature and the second positioning feature cooperate with each other to limit the movement of the insulating member 4 along the plane where the pole piece 2 is located.

[0042] Optionally, one of the first positioning feature and the second positioning feature is a positioning boss 201 , and the other is a positioning groove 401 matching the positioning boss 201 , and the positioning boss 201 and the positioning groove 401 are plug-fitted.

[0043] In this embodiment, the bottoms of the two insulating members 4 are provided with but not limited to two circular positioning grooves 401 , and the top surfaces of the pole pieces 2 are correspondingly provided with four circular positioning bosses 201 , which are plugged in and matched with the positioning grooves 401 in a one-to-one correspondence.

[0044] The utility model changes the traditional method of setting a convex bulge on the magnetic pole piece 2 for riveting into a method of setting a positioning boss 201 (equivalent to a convex bulge) for positioning, thereby eliminating the risk of air leakage caused by thin wall damage due to riveting, improving the qualification rate of the process, reducing the technical difficulty of the stamping process of the convex bulge feature of the magnetic pole piece 2, and reducing the cost of parts.

[0045] Optionally, the elastic member 5 and the armature frame 3 may be either an integrated structure or a split structure.

[0046] like Figure 4 As shown, in the present embodiment, the elastic member 5 is a spring piece integrally stamped by the armature frame 3 and warped upward on the top surface of the armature frame 3. The elastic member 5 has a certain elastic deformation ability. When the cover body 1 is assembled, the elastic member 5 elastically abuts against the inner top wall of the cover body 1. The inner top wall of the cover body 1 presses the elastic member 5 to elastically deform, thereby limiting the movement of the armature frame 3 in the vertical direction. In combination with the positioning structure provided between the insulating member 4 and the pole piece 2, the armature frame 3 is fixed. This assembly method can greatly shorten the production cycle and speed up production efficiency.

[0047] It should be noted that the present invention does not limit the number of elastic members 5 , but in order to ensure a better pressing effect, the number of elastic members 5 can be set to more than two. In this embodiment, the number of elastic members 5 is specifically set to two, symmetrically distributed at both ends of the mounting plate 302 .

[0048] In addition, the present invention does not limit the shape of the elastic member 5. Figure 4As shown, in this embodiment, the elastic member 5 is provided with a connecting portion 501 connected to the mounting plate 302 of the armature frame 3 and an extending portion 502 extending obliquely upward and bent from one end of the connecting portion 501, and the extending portion 502 protrudes from the top surface of the armature frame 3; wherein the extending portion 502 is roughly in the shape of a "C" with the opening facing downward.

[0049] See also Figure 2 , Figure 3 and Figure 8 The relay also includes two stationary contacts 10 fixed side by side on the top of the cover 1, an electromagnetic mechanism and a moving contact assembly.

[0050] Among them, the armature frame 3 is mounted on the outside of the moving contact assembly; the moving contact assembly includes a moving contact piece 7, a lower armature 8, a support frame 9, an insulating base 12, a push rod 13 and a contact spring 14, the lower part of the support frame 9 and the upper part of the push rod 13 are integrally injection-molded in the insulating base 12, the moving contact piece 7 is inserted into the support frame 9 and leans upward against the top wall of the support frame 9; the lower armature 8 is U-shaped, and it is clamped upward on the bottom of the moving contact piece 7, and the two ends of the contact spring 14 are elastically placed on the lower armature 8 and the insulating base 12 respectively.

[0051] Wherein, avoidance windows are provided on both sides of the support frame 9 , and both ends of the lower armature 8 extend upward through the avoidance windows on both sides of the support frame 9 and are arranged opposite to the upper armature 6 .

[0052] The electromagnetic mechanism of the utility model adopts the existing conventional technology and is not an improvement of the present application. Figure 2 As shown, in this embodiment, the electromagnetic mechanism includes a static iron core 15, a moving iron core 16 and a coil winding (not shown in the figure). The static iron core 15 is fixed to the bottom of the magnetic pole piece 2, and the moving iron core 16 is arranged below the static iron core 15 at a relative interval and is fixedly connected to the push rod 13. A sleeve 17 is also fixed to the bottom of the magnetic pole piece 2, and the static iron core 15 and the moving iron core 16 are both accommodated in the sleeve 17, and the coil winding is sleeved on the outside of the sleeve 17.

[0053] When the coil winding is energized, the magnetized moving iron core 16 is attracted by the static iron core 15 and moves upward, and finally closes to the bottom of the static iron core 15. In this process, the moving iron core 16 pushes the moving contact piece 7 upward through the push rod 13, so that the moving contact piece 7 is in contact with the two static contacts 10 and conducts; when the current flows through the moving contact piece 7, a magnetic field is generated, which magnetizes the upper armature 6 and the lower armature 8, so that the upper armature 6 and the lower armature 8 generate suction force to provide upward compensation force for the moving contact piece 7 and improve the short circuit resistance. When the coil winding is de-energized, the magnetic attraction between the moving iron core 16 and the static iron core 15 disappears, and the moving iron core 16 moves downward and resets under the action of the spring, and the moving contact piece 7 is disconnected from the two static contacts 10.

[0054] See also Figure 2 , Figure 8 and Fig. 9 Two supporting legs are provided on both sides of the support frame 9, and the middle parts of the supporting legs on both sides of the support frame 9 are provided with arc-shaped protruding limiting parts 901 facing opposite directions. The inner walls on both sides of the cover body 1 are provided with limiting ribs 101 opposite to the limiting parts 901 in the vertical direction. The limiting parts 901 are used together with the limiting ribs 101 to limit the rotational movement of the moving contact assembly when the moving contact assembly moves up and down.

[0055] The assembly steps of the utility model relay are as follows:

[0056] After the moving contact assembly is assembled in place on the pole piece 2, the two insulating parts 4 in the upper armature assembly are assembled on the pole piece 2 through the positioning groove 401 and the positioning boss 201; then the static assembly (the brazing assembly of the cover body 1, the static contact 10 and the connecting ring 11) is assembled on the pole piece 2 from above, and the elastic part 5 on the armature frame 3 is pressed and fixed by the pressure of the cover body 1; finally, the connecting ring 11 and the pole piece 2 are fixed by laser welding.

[0057] Embodiment 2

[0058] See also Fig.10 and Fig.11 The difference between this embodiment and the first embodiment is that the widths of the two support plates 301 of the armature frame 3 are both increased, and the two support plates 301 are both provided with protrusions 3012 protruding toward each other, and the inner side surfaces of the protrusions 3012 are both designed as limiting surfaces 3011 distributed along the vertical direction, and the limiting surfaces 3011 are arranged opposite to the limiting parts 901 of the support frame 9 with a small gap. The utility model uses the limiting surfaces 3011 designed on the armature frame 3 to cooperate with the limiting parts 901 to limit the rotational movement of the moving contact assembly when the moving contact assembly moves up and down, thereby eliminating the limiting ribs 101 on the cover body 1, optimizing the movement of the moving contact assembly, and reducing the risk of jamming due to wear.

[0059] Embodiment 3

[0060] See also Fig.12 The difference between this embodiment and the first or second embodiment is that the shape of the elastic member 5 is different. Specifically, the elastic member 5 in this embodiment is substantially in a flat "J" shape, and the bending direction of the extension portion 502 of the elastic member 5 is upward.

[0061] Embodiment 4

[0062] The difference between this embodiment and the first or second embodiment is that the elastic member 5 is a spring sheet that is a separate structure from the armature frame 3, and the elastic member 5 is fixed to the outer side surface of the support plate 301 of the armature frame 3 by any one of riveting, welding and bolt connection.

[0063] like Fig.13 As shown, the elastic member 5 in this embodiment is also provided with a connecting portion 501 and an extending portion 502 extending upward and bent from one end of the connecting portion 501, the connecting portion 501 is distributed along the vertical direction, and is fixed on the support plate 301 by riveting; the extending portion 502 protrudes from the top surface of the armature frame 3; wherein the extending portion 502 is roughly "C"-shaped.

[0064] Embodiment 5

[0065] See also Fig.14 The difference between this embodiment and the fourth embodiment is that the shape of the elastic member 5 is different. Specifically, the elastic member 5 in this embodiment is substantially in an inverted "J" shape, and the bending direction of the extension portion 502 of the elastic member 5 is downward.

[0066] Embodiment 6

[0067] The difference between this embodiment and the first or second embodiment is that the shape of the elastic member 5 is different. Fig.15 As shown, there are but not limited to two elastic members 5 , and the two elastic members 5 are centrally symmetrically distributed on both sides of the mounting plate 302 , and are both integrally connected to the mounting plate 302 .

[0068] The two elastic members 5 can be obtained by stamping the two sides of the mounting plate 302, and the two elastic members 5 are in the shape of long strips with a certain degree of curvature, and the length of the elastic member 5 is substantially the same as the length of the mounting plate 302. One end of the elastic member 5 serves as a connecting portion 501, which is integrally connected to the mounting plate 302; the other end of the elastic member 5 serves as an extension portion 502, which is upwardly tilted from the mounting plate 302 and is used to elastically abut against the cover body 1.

[0069] In summary, the utility model relay is provided with an elastic member 5 on the top of the armature frame 3 and an insulating member 4 on the bottom of the armature frame 3. The armature frame 3 is supported on the pole piece 2 by the insulating member 4. The cover body 1 is used to press the armature frame 3 through the elastic member 5, so as to realize the installation and fixation of the armature frame 3. This method does not require brazing and bonding processes. The armature frame 3 can be directly pressed on the pole piece 2 by the cover body 1 through the elastic member 5, which shortens the production cycle and speeds up the production efficiency. Moreover, the height dimensional accuracy of the cover body 1 is not required, and the distance between the upper armature 6 and the lower armature 8 can be accurately controlled to ensure the product's anti-short circuit performance. At the same time, the armature frame 3 is supported on the pole piece 2 by the insulating member 4, and no riveting process is required, which eliminates the risk of air leakage caused by thin wall damage due to riveting, further simplifies the production process, and effectively avoids the risk of high and low voltage breakdown.

[0070] In the above description, many specific details are described to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person familiar with the technical field can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A relay, comprising a housing (1), a magnetic pole piece (2) and an upper armature assembly, wherein the magnetic pole piece (2) is sealedly connected to the housing (1), and the upper armature assembly is accommodated in the housing (1); characterized in that: The upper armature assembly comprises an armature frame (3), an insulating member (4) fixed to the bottom of the armature frame (3), and an elastic member (5) fixed to the top of the armature frame (3); the armature frame (3) is supported on the magnetic pole piece (2) via the insulating member (4); and the cover body (1) is used to press the armature frame (3) via the elastic member (5).

2. The relay according to claim 1, characterized in that: The elastic member (5) is a spring sheet formed by integral stamping of the armature frame (3) and warping upwards from the top surface of the armature frame (3); the elastic member (5) is elastically placed against the inner wall of the cover body (1) to limit the movement of the armature frame (3) in the vertical direction.

3. The relay according to claim 1, characterized in that: The elastic member (5) is a spring sheet that is a separate structure from the armature frame (3); the elastic member (5) is fixed to the armature frame (3) by any one of riveting, welding, and bolt connection; the elastic member (5) is elastically placed against the inner wall of the cover body (1) to limit the movement of the armature frame (3) in the vertical direction.

4. The relay according to claim 2 or 3, characterized in that: The elastic member (5) is provided with a connecting portion (501) connected to the armature frame (3) and an extending portion (502) extending upward from one end of the connecting portion (501) and bent, wherein the extending portion (502) protrudes from the top surface of the armature frame (3).

5. The relay according to claim 1, characterized in that: The pole piece (2) is provided with a first positioning feature on a side facing the upper armature assembly, and the insulating member (4) is provided with a second positioning feature matching the first positioning feature, and the first positioning feature and the second positioning feature are used in conjunction with each other to limit the movement of the insulating member (4) along the plane where the pole piece (2) is located.

6. The relay according to claim 5, characterized in that: One of the first positioning feature and the second positioning feature is a positioning boss (201), and the other is a positioning groove (401) matching the positioning boss (201), and the positioning boss (201) and the positioning groove (401) are plug-fitted.

7. The relay according to claim 1, characterized in that: The armature frame (3) is provided with two support plates (301) distributed in the vertical direction and a mounting plate (302) integrally connected to the upper ends of the two support plates (301), and an upper armature (6) is fixed to the bottom of the mounting plate (302); two insulating members (4) are provided, which are respectively integrally injection-molded at the lower ends of the two support plates (301).

8. The relay according to claim 7, characterized in that: The relay also includes a moving contact assembly, wherein the armature frame (3) is mounted on the outer side of the moving contact assembly; the moving contact assembly includes a moving contact piece (7), a lower armature (8) and a support frame (9), wherein the moving contact piece (7) is inserted into the support frame (9) and abuts against the top wall of the support frame (9), the lower armature (8) is clamped upwardly on the bottom of the moving contact piece (7), and the two ends of the lower armature (8) pass through the two sides of the support frame (9), extend upwardly and are arranged opposite to the upper armature (6).

9. The relay according to claim 8, characterized in that: Both sides of the support frame (9) are provided with limiting portions (901) protruding in directions opposite to each other, and the inner sides of the two support plates (301) are provided with limiting surfaces (3011) opposite to the limiting portions (901) in the vertical direction, and the limiting portions (901) and the limiting surfaces (3011) are used in conjunction with each other to limit the rotational movement of the movable contact assembly.

10. The relay according to claim 8, characterized in that: Both sides of the support frame (9) are provided with limiting portions (901) protruding in directions opposite to each other, and both side inner walls of the cover body (1) are provided with limiting ribs (101) opposite to the limiting portions (901) along the vertical direction, and the limiting portions (901) and the limiting ribs (101) are used in conjunction with each other to limit the rotational movement of the movable contact component.

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