Relay

Abstract

The utility model relates to the technical field of electronic control devices, in particular to a relay which comprises a shell and a shielding cover, the shell has a length direction, a width direction and a height direction which are perpendicular to one another, a magnetic circuit part is arranged in the shell and comprises a coil assembly, and the axial direction of the coil assembly is consistent with the length direction of the shell; a first outer surface is arranged on one side of the shell in the width direction, and a groove is formed in the first outer surface; the shielding cover comprises a U-shaped plate-shaped structure, the U-shaped plate-shaped structure comprises a first clamping plate, a second clamping plate and a connecting plate connected between the first clamping plate and the second clamping plate, the connecting plate is located outside the side wall, close to the coil assembly, of the shell, and the first clamping plate and the second clamping plate are located on the two sides of the shell in the width direction respectively. At least part of the first clamping plate is located in the groove in the width direction of the shell, so that the size of the relay in the width direction is reduced, the appearance size of the relay is further reduced, and product miniaturization is facilitated.

Description

Technical Field

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

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. A relay is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] In the related art, a shielding cover is provided outside the relay. To facilitate installation of the shielding cover, guide ridges are usually provided on the housing of the relay. However, the provision of the guide ridges will increase the width dimension of the relay, which is not conducive to miniaturization of the relay product. Utility Model Content

[0004] The embodiment of the utility model provides a relay to reduce the external volume of the relay.

[0005] The relay provided by the embodiment of the utility model comprises:

[0006] A shell, wherein the shell has a length direction, a width direction, and a height direction that are perpendicular to each other, a magnetic circuit portion is disposed in the shell, the magnetic circuit portion includes a coil assembly, and the axial direction of the coil assembly is consistent with the length direction of the shell; one side of the shell in the width direction has a first outer surface, and the first outer surface is provided with a groove; and

[0007] The shielding cover comprises a U-shaped plate structure, wherein the U-shaped plate structure comprises a first clamping plate, a second clamping plate and a connecting plate connected between the first clamping plate and the second clamping plate, wherein the connecting plate is located outside the side wall of the shell close to the coil assembly, and the first clamping plate and the second clamping plate are respectively located on both sides of the width direction of the shell; along the width direction of the shell, at least a portion of the first clamping plate is located in the groove.

[0008] According to some embodiments of the present invention, a surface of the first clamping plate facing away from the second clamping plate is flush with the first outer surface.

[0009] According to some embodiments of the utility model, the first clamping plate is provided with a positioning portion, and the bottom of the groove is provided with a positioning matching portion, and the positioning matching portion cooperates with the positioning portion to limit the movement of the shielding cover relative to the shell.

[0010] According to some embodiments of the present utility model, one of the positioning portion and the positioning matching portion is a positioning hole, and the other is a positioning protrusion, and the positioning protrusion is limited to the positioning hole.

[0011] According to some embodiments of the utility model, a mounting groove is provided in the shell, and a first magnetic isolation portion is installed in the mounting groove. Along the length direction of the shell, the first magnetic isolation portion is located between the coil assembly and the side wall of the shell.

[0012] According to some embodiments of the present invention, the coil assembly includes a coil frame, an end surface of one end of the coil frame in the length direction is provided with an escape space, and the first magnetic isolation portion is located in the escape space.

[0013] According to some embodiments of the present utility model, the shielding cover further includes a side plate, and the side plate is connected to the U-shaped plate structure;

[0014] One side of the shell in the length direction has a third outer surface, and the side plate is located on the third outer surface.

[0015] According to some embodiments of the present invention, a second magnetic isolation portion is provided on the outer surface of the side plate.

[0016] According to some embodiments of the present invention, the magnetic circuit portion further includes an armature assembly, and along the height direction of the housing, at least a portion of the projection of the armature assembly within the first outer surface is located within the projection of the first clamping plate within the first outer surface.

[0017] According to some embodiments of the utility model, the relay also includes a contact part; the coil assembly, the armature assembly and the contact part are arranged along the height direction of the housing; the coil assembly is used to drive the armature assembly to swing around a set axis to drive the contact part to move to a closed position or an open position.

[0018] According to some embodiments of the present utility model, a retaining wall is provided in the housing, and the retaining wall is located between the contact portion and the armature assembly.

[0019] According to some embodiments of the utility model, the relay also includes a fixed frame, an auxiliary moving spring and an auxiliary static spring; the fixed frame is fixedly connected to the housing, the auxiliary moving spring and the auxiliary static spring are installed at one end of the fixed frame in the length direction, the auxiliary moving spring is provided with a first contact portion, and the auxiliary static spring is provided with a second contact portion; the armature assembly is rotatably installed on the fixed frame, and the coil assembly is used to drive the armature assembly to swing around a set axis to drive the contact part to move to a closed position or an open position, and drive the auxiliary moving spring to move relative to the auxiliary static spring to make the first contact portion contact or separate from the second contact portion.

[0020] According to some embodiments of the utility model, the first outer surface is provided with a through hole, the through hole is spaced apart from the groove, and the through hole is used for allowing the auxiliary moving spring, the auxiliary static spring and the coil pin of the coil assembly to pass through the housing.

[0021] According to some embodiments of the present invention, the first contact portion includes at least one protrusion, and line-surface contact is formed between the protrusion and the second contact portion.

[0022] One embodiment of the above utility model has at least the following advantages or beneficial effects:

[0023] (1) The relay provided in the embodiment of the utility model can enhance the anti-magnetic effect and effectively reduce the interference of the external magnetic field on the coil assembly by setting a shielding cover. Since the first outer surface is provided with a groove, after the shielding cover is installed on the shell, at least part of the first clamping plate of the shielding cover can be located in the groove along the width direction of the shell, thereby reducing the width dimension of the relay, and further reducing the external volume of the relay, which is conducive to product miniaturization.

[0024] (2) In the relay provided by the embodiment of the utility model, the magnetic circuit part also includes an armature assembly, and along the height direction of the housing, at least part of the projection of the armature assembly in the first outer surface is located within the projection of the first clamping plate in the first outer surface. In this way, it can be ensured that the first clamping plate can cover at least part of the armature assembly along the height direction of the housing. Due to the embedding of the first clamping plate, the distance between the first clamping plate and the permanent magnet of the armature assembly is closer. When there is an external magnetic field, the shielding cover can more easily protect the armature assembly, and the external magnetic field can be more easily guided away by the shielding cover when passing through the armature assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 What is shown is a schematic diagram of the structure of a relay provided in an embodiment of the utility model;

[0026] Figure 2What is shown is a schematic diagram of the structure of a relay provided by an embodiment of the utility model (the shielding cover is not shown);

[0027] Figure 3 Shown is a front view of a relay provided by an embodiment of the utility model;

[0028] Figure 4 Shown is a cross-sectional view of a relay provided by an embodiment of the utility model;

[0029] Figure 5 The figure shows the internal structure of the relay provided by the embodiment of the utility model (the coil assembly and the contact part are not shown);

[0030] Figure 6 It is shown that Figure 5 A partial enlarged view of point Ⅰ in the middle;

[0031] Figure 7 What is shown is a schematic diagram of the internal structure of a relay provided by an embodiment of the utility model;

[0032] Figure 8 Shown is a schematic diagram of the auxiliary moving reed and the auxiliary static reed in a contact state;

[0033] Fig. 9 What is shown is a schematic diagram of the structure of a base in a relay provided in an embodiment of the utility model;

[0034] Fig.10 Another structural schematic diagram of a relay provided by an embodiment of the utility model is shown;

[0035] Fig.11 A front view of another structure of a relay provided by an embodiment of the utility model is shown;

[0036] Fig.12 It is shown that Fig.11 Cross-sectional view along line BB.

[0037] The following are the descriptions of the reference numerals:

[0038] 10-housing; 11-base; 111-installation slot; 112-retaining wall; 12-cover; 121-groove; 1211-positioning protrusion; 1212-first sub-slot wall; 1213-second sub-slot wall; 1214-third sub-slot wall; 13-first outer surface; 14-third outer surface; 20-shielding cover; 21-first clamping plate; 22-second clamping plate; 23-connecting plate; 24-side plate; 31-auxiliary static spring; 311-second contact portion; 32-auxiliary dynamic spring; 321-first contact portion; 3211-protrusion; 3212-buffer space; 41-coil assembly; 411-first yoke ;412-second yoke;413-coil frame;414-coil pin;42-armature assembly;421-fixing member;4211-rotating shaft;4212-first arm;4213-second arm;422-first arm;423-second arm;51-first moving spring;52-first moving contact;53-first static contact;54-first lead-out piece;61-second moving spring;62-second moving contact;63-second static contact;64-second lead-out piece;71-first pushing member;72-second pushing member;721-slot;80-fixing frame;91-first magnetic isolation part;92-second magnetic isolation part. DETAILED DESCRIPTION

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0040] See also Figures 1 to 12 As shown, this embodiment provides a relay, including a shell 10 and a shielding cover 20, the shell 10 has a length direction (indicated by the arrow direction D1), a width direction (indicated by the arrow direction D2) and a height direction (indicated by the arrow direction D3) that are perpendicular to each other, a magnetic circuit part is arranged in the shell 10, the magnetic circuit part includes a coil assembly 41, and the axial direction of the coil assembly 41 is consistent with the length direction of the shell 10; one side of the width direction of the shell 10 has a first outer surface 13, and the first outer surface 13 is provided with a groove 121; the shielding cover 20 includes a U-shaped plate structure, the U-shaped plate structure includes a first clamping plate 21, a second clamping plate 22 and a connecting plate 23 connected between the first clamping plate 21 and the second clamping plate 22, the connecting plate 23 is located outside the side wall of the shell 10 close to the coil assembly 41, and the first clamping plate 21 and the second clamping plate 22 are respectively located on both sides of the width direction of the shell 10; along the width direction of the shell 10, at least part of the first clamping plate 21 is located in the groove 121.

[0041] The relay provided in this embodiment can enhance the anti-magnetic effect and effectively reduce the interference of the external magnetic field on the coil assembly 41 by setting the shielding cover 20. Since the first outer surface 13 is provided with a groove 121, after the shielding cover 20 is installed on the shell 10, at least part of the first clamping plate 21 of the shielding cover 20 can be located in the groove 121 along the width direction of the shell 10, thereby reducing the width direction size of the relay, and then reducing the external volume of the relay, which is conducive to product miniaturization.

[0042] Exemplarily, the material of the shielding cover 20 may be iron.

[0043] In one embodiment, see Figure 4 As shown, the magnetic circuit part also includes an armature assembly 42. Along the height direction of the housing 10, at least part of the projection of the armature assembly 42 in the first outer surface 13 is located within the projection of the first clamping plate 21 in the first outer surface 13. In this way, it can be ensured that the first clamping plate 21 can cover at least part of the armature assembly 42 along the height direction of the housing 10. Due to the embedding of the first clamping plate 21, the distance between the first clamping plate 21 and the permanent magnet of the armature assembly 42 is closer. When there is an external magnetic field, the shielding cover 20 is more likely to protect the armature assembly 42, and the external magnetic field is more likely to be guided away by the shielding cover 20 when passing through the armature assembly 42.

[0044] Specifically, the external magnetic field enters the permanent magnet, and a part of the magnetic field follows the shortest path (in Figure 4 The direction of the arrow M in the figure indicates the direction of the magnetic field. This principle is used to conduct the magnetic field, thereby enhancing the ability of the magnetic field to enter the relay and improving the anti-magnetic ability of the relay.

[0045] See also Figure 1 and Figure 2 As shown, the housing 10 includes a base 11 and a cover 12 . The cover 12 is disposed on the base 11 . Exemplarily, the cover 12 and the base 11 are connected by snap fastening.

[0046] In this embodiment, the first outer surface 13 is the surface of the cover 12 facing away from the base 11. By providing a groove 121 on the first outer surface 13, at least part of the first clamping plate 21 can be embedded in the cover 12, thereby reducing the width dimension of the relay.

[0047] The surface opposite to the first outer surface 13 is the second outer surface. The second outer surface is the surface of the base 11 facing away from the cover 12 . The surface of the second clamping plate 22 close to the first clamping plate 21 is in contact with the second outer surface.

[0048] It should be noted that when there is extra space on the base 11 along the height direction of the housing 10 , a recessed groove may be provided on the second outer surface, and at least a portion of the second clamping plate 22 is confined in the recessed groove.

[0049] In one embodiment, the surface of the first clamping plate 21 facing away from the second clamping plate 22 is flush with the first outer surface 13. In this way, the dimension of the relay in the width direction can be further reduced while ensuring the anti-magnetic capability of the shielding cover 20.

[0050] In one embodiment, the first clamping plate 21 is provided with a positioning portion, and the bottom of the groove 121 is provided with a positioning matching portion, and the positioning matching portion cooperates with the positioning portion to limit the movement of the shielding cover 20 relative to the outer shell 10, thereby ensuring as much as possible that the distance between the shielding cover 20 and the permanent magnet of the armature assembly 42 remains unchanged. When the external magnetic field enters the permanent magnet, a part of the magnetic field is conducted according to the principle of the shortest path, thereby enhancing the conduction ability of the magnetic field into the interior of the relay and improving the anti-magnetic ability of the relay.

[0051] In one embodiment, see Figure 2 As shown, the positioning portion is a positioning hole, the positioning matching portion is a positioning protrusion 1211, and the positioning protrusion 1211 is limited to the positioning hole.

[0052] During assembly, the shielding cover 20 can be pushed along the height direction of the housing 10 toward the housing 10 until the positioning protrusion 1211 is located in the positioning hole.

[0053] Exemplarily, the surface of the positioning protrusion 1211 may be a spherical cap curved surface to facilitate assembly.

[0054] It should be understood that the groove 121 includes a groove bottom and a groove wall arranged at the periphery of the groove bottom. Figure 2 As shown, the groove wall may include a first sub-groove wall 1212, a second sub-groove wall 1213 and a third sub-groove wall 1214. The first sub-groove wall 1212 and the second sub-groove wall 1213 are arranged opposite to each other, and the third sub-groove wall 1214 is located between the first sub-groove wall 1212 and the second sub-groove wall 1213. In other embodiments, the groove wall may not include the second sub-groove wall.

[0055] In one embodiment, see Figure 8 and Fig. 9 As shown, a mounting groove 111 is provided in the housing 10 , and a first magnetic isolation portion 91 is installed in the mounting groove 111 . Along the length direction of the housing 10 , the first magnetic isolation portion 91 is located between the coil assembly 41 and the side wall of the housing 10 .

[0056] By providing the first magnetic isolation portion 91 between the coil assembly 41 and the side wall of the housing 10 , the magnetic resistance of the external magnetic field entering the interior of the relay can be increased, thereby weakening the interference of the external magnetic field on the magnetic circuit.

[0057] In one embodiment, the coil assembly 41 includes a coil frame 413, and an escape space is provided on an end surface of one end of the coil frame 413 in the length direction, and the first magnetic isolation portion 91 is located in the escape space. In this way, the first magnetic isolation portion 91 can be arranged without increasing the length of the relay to enhance the anti-magnetic effect.

[0058] For example, see Figure 8 As shown, the coil assembly 41 includes a coil frame 413, and the coil is wound on the coil frame 413 to form a coil body. The avoidance space is set on the lower surface of the coil frame 413, and the avoidance space runs through the outer end surface of the coil frame 413. During assembly, the first magnetic isolation portion 91 can be installed in the installation groove 111 first, and then the coil assembly 41 is installed. At this time, the avoidance space on the coil frame 413 is aligned with the first magnetic isolation portion 91. After the coil frame 413 is installed in place, it can press and fix the first magnetic isolation portion 91.

[0059] Exemplarily, the first magnetic isolation portion 91 may be an iron sheet.

[0060] In one embodiment, the shielding cover 20 further includes a side plate 24 , and the side plate 24 is connected to the U-shaped plate structure.

[0061] For example, see Figures 10 to 12 As shown, the side plate 24 is connected to the second clamping plate 22 ; one side in the length direction of the housing 10 has a third outer surface 14 , and the side plate 24 is located on the third outer surface 14 .

[0062] When the relay is installed in the case of the electric meter, one side wall of the shell 10 in the length direction is close to the side wall of the case. In order to prevent the external magnetic field from interfering with the coil assembly 41 of the relay, the side plate 24 is arranged on the outer surface of the side wall of the shell 10 close to the side wall of the case, that is, the side plate 24 is located between the side wall of the shell and the side wall of the case, further enhancing the anti-magnetic ability.

[0063] It should be noted that the side plate 24 can also be connected to the first clamping plate 21 or the connecting plate 23, and those skilled in the art can choose according to the actual installation environment. Exemplarily, when the side plate 24 is connected to the first clamping plate 21, the side plate 24 is located on the fourth outer surface, wherein the fourth outer surface is arranged opposite to the third outer surface 14, and the groove runs through the fourth outer surface.

[0064] In one embodiment, see Fig.11 As shown, a second magnetic isolation portion 92 is disposed on the outer surface of the side plate 24 .

[0065] The function of the second magnetic isolation part 92 is substantially the same as that of the first magnetic isolation part 91. The second magnetic isolation part 92 and the first magnetic isolation part 91 may be provided at the same time, or only one of them may be provided. Exemplarily, the second magnetic isolation part 92 may also be an iron sheet.

[0066] In one embodiment, the relay also includes a contact part; the coil assembly 41, the armature assembly 42 and the contact part are arranged along the height direction of the housing 10; the coil assembly 41 is used to drive the armature assembly 42 to swing around a set axis to drive the contact part to move to a closed position or an open position.

[0067] See also Figure 7 As shown, the coil assembly 41, the armature assembly 42 and the contact part are arranged along the height direction of the housing 10, and the layout is reasonable and compact, which is further conducive to miniaturization of relay products.

[0068] See also Figure 7 As shown, the coil assembly 41 includes a coil body, an iron core is arranged inside the coil body, one end of the iron core is connected to the first yoke 411, and the other end of the iron core is connected to the second yoke 412; the armature assembly 42 includes a fixing member 421 and a first armature 422 and a second armature 423 partially covered in the fixing member 421; the relay also includes a fixing frame 80, the fixing frame 80 is fixedly connected to the housing 10, one of the fixing member 421 and the fixing frame 80 is provided with a rotating shaft 4211, and the other is provided with an axial hole, The rotating shaft 4211 cooperates with the shaft hole, and the axis is set to be the axis of the rotating shaft 4211; the first yoke 411 is located at one end of the first armature 422 and the second armature 423, and the second yoke 412 is located at the other end of the first armature 422 and the second armature 423; in the closed position, the first armature 422 and the second yoke 412 are attracted, and the second armature 423 and the first yoke 411 are attracted; in the open position, the first armature 422 and the first yoke 411 are attracted, and the second armature 423 and the second yoke 412 are attracted.

[0069] The armature assembly 42 also includes a permanent magnet, which is arranged between the first armature 422 and the second armature 423 and fixed together by a fixing member 421. Exemplarily, the fixing member 421 can be an injection molded part, which covers the first armature 422, the second armature 423 and the permanent magnet to form a whole. Both ends of the first armature 422 and the second armature 423 are located outside the injection molded part to facilitate attraction with the first yoke 411 and the second yoke 412.

[0070] In this embodiment, see Figure 7 As shown, the fixing member 421 is provided with a rotating shaft 4211, and the axis is set to be the axis of the rotating shaft 4211; the fixing frame 80 is provided with an axis hole, and the rotating shaft 4211 cooperates with the axis hole; accordingly, the base 11 is also provided with an axis hole. In order to clearly describe the technical solution of this embodiment, the axis hole provided by the fixing frame 80 is named as the first axis hole, and the axis hole provided by the base 11 is named as the second axis hole. One end of the rotating shaft 4211 cooperates with the first axis hole, and the other end of the rotating shaft 4211 cooperates with the second axis hole.

[0071] In other embodiments, an axial hole may be provided on the fixing member 421 , and a rotating shaft 4211 may be provided on the fixing frame 80 .

[0072] In one embodiment, see Figure 5 As shown, a retaining wall 112 is provided in the housing 10, and the retaining wall 112 is located between the contact portion and the armature assembly 42. By providing the retaining wall 112, the creepage distance can be increased to enhance the insulation safety. At the same time, glue can also be applied on the surface of the retaining wall 112 to fix the fixing frame 80.

[0073] Exemplarily, the retaining wall 112 is integrally formed with the base 11 .

[0074] In one embodiment, see Figure 2 , Figure 6 and Figure 8 As shown, the relay also includes an auxiliary moving spring 32 and an auxiliary static spring 31; the auxiliary moving spring 32 and the auxiliary static spring 31 are installed at one end of the length direction of the fixing frame 80, the auxiliary moving spring 32 is integrally formed with a first contact portion 321, and the auxiliary static spring 31 is integrally formed with a second contact portion 311; the coil assembly 41 is used to drive the armature assembly 42 to swing around the set axis to drive the contact part to move to the closed position or the open position, and drive the auxiliary moving spring 32 to move relative to the auxiliary static spring 31, so that the first contact portion 321 is in contact with or separated from the second contact portion 311.

[0075] The auxiliary moving spring 32 and the auxiliary static spring 31 are spaced apart along the width direction of the fixing frame 80 , and the width direction of the fixing frame 80 is consistent with the height direction of the housing. Compared with the existing micro switch, the reed-type auxiliary switch in this embodiment is smaller in size.

[0076] The fixing frame 80 is provided with a first mounting hole and a second mounting hole, and the auxiliary movable spring piece 32 is installed in the first mounting hole. The auxiliary movable spring piece 32 has a first end and a second end opposite to each other, and the first end and the second end are respectively located at two sides of the fixing frame 80, and the first end extends from the housing for connection with the circuit board, and the second end is located inside the housing, and the first contact portion 321 is arranged near the second end. The auxiliary static spring piece 31 also has a first end and a second end opposite to each other, and the auxiliary static spring piece 31 is installed in the second mounting hole, and the first end and the second end of the auxiliary static spring piece 31 are respectively located at two sides of the fixing frame 80, and the first end extends from the housing for connection with the circuit board, and the second end is located inside the housing, and the second contact portion 311 is arranged near the second end.

[0077] In this embodiment, the first ends of the auxiliary movable spring 32 and the auxiliary static spring 31 extend from the cover 12 to the outside of the housing, and of course, they can also extend from the base 11 to the outside of the housing. It should be noted that the base 11 is not necessarily located below the cover 12 in the use state.

[0078] See also Figure 5 As shown, the auxiliary moving spring 32 and the auxiliary static spring 31 are both installed at one end of the length direction of the fixing frame 80, ensuring that the first ends of the auxiliary moving spring 32 and the auxiliary static spring 31 are located on the same side of the relay, which is convenient for connection with the circuit board.

[0079] In this embodiment, the armature assembly 42 can drive the auxiliary movable spring piece 32 to move toward the direction close to the auxiliary static spring piece 31, so that the first contact portion 321 contacts the second contact portion 311. The armature assembly 42 can also drive the auxiliary movable spring piece 32 to move away from the auxiliary static spring piece 31, so that the first contact portion 321 separates from the second contact portion 311.

[0080] In this embodiment, when the contact portion moves to the closed position, the first contact portion 321 contacts the second contact portion 311 ; when the contact portion moves to the open position, the first contact portion 321 separates from the second contact portion 311 .

[0081] In other embodiments, when the contact portion moves to the closed position, the first contact portion 321 is separated from the second contact portion 311 ; when the contact portion moves to the open position, the first contact portion 321 is in contact with the second contact portion 311 .

[0082] In one embodiment, see Figure 7 As shown, the contact part includes a first movable spring part and a second movable spring part, the first movable spring part includes a first movable spring piece 51, a first movable contact 52 and a first static contact 53; the second movable spring part includes a second movable spring piece 61, a second movable contact 62 and a second static contact 63, the first movable contact 52 of the first movable spring part corresponds to the position of the second static contact 63 of the second movable spring part, and the second movable contact 62 of the second movable spring part corresponds to the position of the first static contact 53 of the first movable spring part; in the closed position, the first movable contact 52 contacts with the second static contact 63, and the second movable contact 62 contacts with the first static contact 53; in the open position, the first movable contact 52 is separated from the second static contact 63, and the second movable contact 62 is separated from the first static contact 53.

[0083] In this embodiment, see Figure 7As shown, the first movable spring part further includes a first lead-out piece 54, and the second movable spring part further includes a second lead-out piece 64. Exemplarily, the first movable contact 52 is connected to one end of the first movable spring piece 51, the other end of the first movable spring piece 51 is connected to the first lead-out piece 54, the first static contact 53 is riveted to the first lead-out piece 54, and the other end of the first movable spring piece 51 is fixed between the first lead-out piece 54 and the first static contact 53. Similarly, the second movable contact 62 is connected to one end of the second movable spring piece 61, the other end of the second movable spring piece 61 is connected to the second lead-out piece 64, the second static contact 63 is riveted to the second lead-out piece 64, and the other end of the second movable spring piece 61 is fixed between the second lead-out piece 64 and the second static contact 63. Among them, the first moving contact 52 of the first moving spring part corresponds to the position of the second static contact 63 of the second moving spring part, and the second moving contact 62 of the second moving spring part corresponds to the position of the first static contact 53 of the first moving spring part, so as to form a parallel circuit structure when the moving and static contacts are in contact.

[0084] In one embodiment, see Figure 7 As shown, the armature assembly 42 has a first arm 4212 and a second arm 4213 ; illustratively, the first arm 4212 and the second arm 4213 are integrally formed and arranged on the fixing member 421 , and the first arm 4212 and the second arm 4213 extend outward from both ends of the fixing member 421 , respectively.

[0085] The relay also includes two pushers, which are a first pusher 71 and a second pusher 72; one end of the first pusher 71 is connected to the first arm 4212, and the other end of the first pusher 71 is connected to the first moving contact 52 through the first moving spring 51; one end of the second pusher 72 is connected to the second arm 4213, and the other end of the second pusher 72 is connected to the second moving contact 62 through the second moving spring 61; the auxiliary moving spring 32 is connected to one of the pushers, and the pusher connected to the auxiliary moving spring 32 can drive the auxiliary moving spring 32 to move relative to the auxiliary static spring 31, wherein, in the closed position, the first contact portion 321 is in contact with the second contact portion 311; in the open position, the first contact portion 321 is separated from the second contact portion 311.

[0086] In this embodiment, the auxiliary switch is disposed on a side of the housing close to the second yoke 412 , and the auxiliary movable spring 32 is connected to the second pusher 72 .

[0087] Of course, the auxiliary switch can also be arranged at one end of the fixing frame 80 close to the first yoke 411 . In this case, the auxiliary movable spring 32 is connected to the first pushing member 71 .

[0088] During operation, power is supplied to the coil body to generate a magnetic field, and different magnetic fields drive the armature assembly to swing accordingly, thereby driving the movable contact of the contact part to move through the pusher. For example, when the armature assembly swings clockwise, the first movable contact 52 separates from the second static contact 63, and at the same time, the second movable contact 62 separates from the first static contact 53; when the armature assembly swings counterclockwise, the first movable contact 52 contacts the second static contact 63, and at the same time, the second movable contact 62 contacts the first static contact 53.

[0089] The cooperation manner between the push member and the first arm 4212 or the second arm 4213 should be understandable to those skilled in the art, and is well known and easy to implement for those skilled in the art, so it will not be described in detail in this embodiment.

[0090] In one embodiment, see Figure 2 As shown, the first outer surface 13 is provided with a through hole, which is spaced apart from the groove 121 , and the through hole is used for allowing the auxiliary moving spring 32 , the auxiliary static spring 31 and the coil pin 414 of the coil assembly 41 to pass through the housing 10 .

[0091] Specifically, there are four through holes, which are spaced apart along the height direction of the housing 10. One group of two adjacent through holes is used for the coil pin 414 to pass through the housing 10, and the other group of two adjacent through holes is used for the auxiliary moving spring 32 and the auxiliary static spring 31 to pass through the housing 10 respectively.

[0092] After the auxiliary moving reed 32 , the auxiliary stationary reed 31 and the coil pin 414 are welded to the circuit board, the relay can be more flush with the circuit board.

[0093] See also Figure 2 , Fig.11 and Fig.12 As shown, along the length direction of the shell 10, the width of the groove 121 is smaller than the length of the shell 10, and the four through holes are all arranged in the portion of the first outer surface 13 located between the groove wall of the groove 121 and the side wall of the shell 10 close to the groove wall. Taking the auxiliary movable spring 32 as an example, since along the width direction of the shell 10, the distance between the first outer surface 13 and the fixing frame 80 is greater than the distance between the groove bottom of the groove 121 and the fixing frame 80, the contact position between the auxiliary movable spring 32 and the fixing frame 80 and the contact position between the auxiliary movable spring 32 and the shell 10 are far apart, thereby protecting the auxiliary movable spring 32 and reducing the risk of bending or even fatigue fracture of the auxiliary movable spring 32.

[0094] Likewise, it can also protect the auxiliary static spring piece 31 and reduce the risk of the auxiliary static spring piece 31 being bent when connected to the circuit board.

[0095] In this embodiment, the auxiliary movable spring piece 32 is integrally formed with a first contact portion 321, and the auxiliary static spring piece 31 is integrally formed with a second contact portion 311, so there is no need to perform riveting or welding operations on the auxiliary contacts, thereby improving production efficiency.

[0096] In one embodiment, the first contact portion 321 includes at least one protrusion 3211, and a line-surface contact is formed between the protrusion 3211 and the second contact portion 311. This ensures that the protrusion 3211 and the second contact portion 311 are in reliable contact, thereby improving the sensitivity of the auxiliary switch.

[0097] In some embodiments, the protrusion 3211 can be formed by stamping the auxiliary movable spring 32 or by bending the auxiliary movable spring 32 .

[0098] In other embodiments, the protrusion 3211 can also make the auxiliary movable spring 32 into a sheet structure with different thicknesses. For example, the auxiliary movable spring 32 is partially thickened, and the thickened part forms the protrusion 3211. For example, the auxiliary movable spring 32 is formed with two thinning areas set at intervals, and the part between the two thinning areas forms the protrusion 3211.

[0099] In some other embodiments, the auxiliary movable spring 32 can be formed by die casting.

[0100] A portion of the auxiliary movable spring 32 close to the second end is bent toward the auxiliary static spring 31 to form a protrusion 3211 .

[0101] For example, see Figure 6 and Figure 8 As shown, the raised portion 3211 is generally in a U-shaped bending structure, and the surface of the U-shaped bending structure facing the second contact portion 311 is an arc-shaped surface; the second contact portion 311 is a generally vertical plane, and the arc-shaped surface is in line-surface contact with the second contact surface, thereby improving the contact reliability and further improving the sensitivity of the auxiliary switch.

[0102] It should be noted that the shape of the protrusion is not limited to the U-shaped bending structure, for example, it can also be a V-shaped bending structure, and the surface of the V-shaped bending structure facing the second contact portion 311 is an arc surface.

[0103] In one embodiment, there are two protrusions 3211, and a buffer space 3212 is provided between the two protrusions 3211. This can produce a double contact effect, ensure that the first contact portion 321 and the second contact portion 311 of the auxiliary switch can contact normally, and enhance contact reliability.

[0104] It should be understood that in other embodiments, the auxiliary moving spring piece 32 and the auxiliary static spring piece 31 may not be provided, which can further reduce the length dimension of the relay.

[0105] Finally, it should be noted that: it is understandable that the various embodiments / implementations provided by the present utility model can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0106] In the embodiments of the utility model, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0107] In the description of the utility model embodiments, it needs to be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the utility model embodiments.

[0108] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0109] The above are only preferred embodiments of the utility model embodiments, and are not intended to limit the utility model embodiments. For those skilled in the art, the utility model embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model embodiments shall be included in the protection scope of the utility model embodiments.

Claims

1. A relay, characterized in that: include: A shell, wherein the shell has a length direction, a width direction, and a height direction that are perpendicular to each other, a magnetic circuit portion is disposed in the shell, the magnetic circuit portion includes a coil assembly, and the axial direction of the coil assembly is consistent with the length direction of the shell; one side of the shell in the width direction has a first outer surface, and the first outer surface is provided with a groove; and The shielding cover comprises a U-shaped plate structure, wherein the U-shaped plate structure comprises a first clamping plate, a second clamping plate and a connecting plate connected between the first clamping plate and the second clamping plate, wherein the connecting plate is located outside the side wall of the shell close to the coil assembly, and the first clamping plate and the second clamping plate are respectively located on both sides of the width direction of the shell; along the width direction of the shell, at least a portion of the first clamping plate is located in the groove.

2. The relay according to claim 1, characterized in that: A surface of the first clamping plate facing away from the second clamping plate is flush with the first outer surface.

3. The relay according to claim 1, characterized in that: The first clamping plate is provided with a positioning portion, and the groove bottom of the groove is provided with a positioning matching portion, and the positioning matching portion cooperates with the positioning portion to limit the shielding cover from moving relative to the shell.

4. The relay according to claim 3, characterized in that: One of the positioning portion and the positioning matching portion is a positioning hole, and the other is a positioning protrusion, and the positioning protrusion is limited to the positioning hole.

5. The relay according to claim 1, characterized in that: An installation groove is arranged in the shell, and a first magnetic isolation part is installed in the installation groove. Along the length direction of the shell, the first magnetic isolation part is located between the coil assembly and the side wall of the shell.

6. The relay according to claim 5, characterized in that: The coil assembly comprises a coil frame, an end surface of one end of the coil frame in the length direction is provided with an escape space, and the first magnetic isolation portion is located in the escape space.

7. The relay according to claim 1, characterized in that: The shielding cover also includes side panels, and the side panels are connected to the U-shaped plate structure; One side of the shell in the length direction has a third outer surface, and the side plate is located on the third outer surface.

8. The relay according to claim 7, characterized in that: The outer surface of the side plate is provided with a second magnetic isolation portion.

9. The relay according to any one of claims 1 to 8, characterized in that: The magnetic circuit portion further includes an armature assembly. Along the height direction of the housing, at least a portion of a projection of the armature assembly within the first outer surface is located within a projection of the first clamping plate within the first outer surface.

10. The relay according to claim 9, characterized in that: It also includes a contact part; the coil assembly, the armature assembly and the contact part are arranged along the height direction of the shell; the coil assembly is used to drive the armature assembly to swing around a set axis to drive the contact part to move to a closed position or an open position.

11. The relay according to claim 10, characterized in that: A retaining wall is arranged in the housing, and the retaining wall is located between the contact portion and the armature assembly.

12. The relay according to claim 10, characterized in that: It also includes a fixed frame, an auxiliary movable spring and an auxiliary static spring; the fixed frame is fixedly connected to the shell, the auxiliary movable spring and the auxiliary static spring are installed at one end of the fixed frame in the length direction, the auxiliary movable spring is provided with a first contact portion, and the auxiliary static spring is provided with a second contact portion; the armature assembly is rotatably installed on the fixed frame, and the coil assembly is used to drive the armature assembly to swing around a set axis to drive the contact portion to move to a closed position or an open position, and drive the auxiliary movable spring to move relative to the auxiliary static spring to make the first contact portion contact or separate from the second contact portion.

13. The relay according to claim 12, characterized in that: The first outer surface is provided with a through hole, the through hole is spaced apart from the groove, and the through hole is used for allowing the auxiliary moving spring piece, the auxiliary static spring piece and the coil pin of the coil assembly to pass through the housing.

14. The relay according to claim 12, characterized in that: The first contact portion includes at least one protrusion, and line-surface contact is formed between the protrusion and the second contact portion.

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