Relay

Abstract

The utility model relates to the technical field of electronic control devices, in particular to a relay, which comprises a first shell, an insulating cover, a yoke clamp and magnetic steel, the insulating cover is arranged in the first shell, and the side wall of the insulating cover is provided with an inner concave part; the yoke clamp is installed between the first shell and the insulating cover so as to fix the magnetic steel in the inner concave part. The inner concave part is arranged on the side wall of the insulating cover, so that a larger placing space is reserved for the magnetic steel, the size of the magnetic steel is increased as much as possible, and the arc extinguishing capability is enhanced; and the magnetic steel is fixed in the concave part through the yoke clamp, so that the magnetic steel cannot protrude out of the insulating cover, and the boundary dimension of the relay cannot be influenced.

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] High-voltage DC relay is a kind of relay. Existing high-voltage DC relay is usually equipped with auxiliary contact structure to meet the detection or monitoring function in the control circuit. In order to reduce the size of the relay, it is necessary to reduce the size of the insulation cover while meeting the installation position of the auxiliary lead pin. However, the setting of the magnetic steel will increase the size of the relay. If the volume of the magnetic steel is reduced, the arc extinguishing ability will decrease. Utility Model Content

[0004] The embodiment of the utility model provides a relay, which can enhance the arc extinguishing ability of the magnetic steel under the premise of reducing the external dimensions of the relay.

[0005] The relay provided by the embodiment of the utility model includes a first shell, an insulating cover, a yoke clamp and a magnet. The insulating cover is installed in the first shell, and the side wall of the insulating cover is provided with an inner recess; the yoke clamp is installed between the first shell and the insulating cover to fix the magnet to the inner recess.

[0006] According to some embodiments of the utility model, the first shell is cylindrical; the insulating cover includes a first cover body and a second cover body, the first cover body has two opposite long sides and two opposite short sides, and the long sides extend in a direction parallel to the radial direction of the first shell; the second cover body protrudes outside the long sides, and the inner cavity of the second cover body is connected to the inner cavity of the first cover body, and the inner recess is formed between the side wall of the second cover body close to the long sides and the long sides.

[0007] According to some embodiments of the present utility model, the relay further includes a static contact and an auxiliary lead-out needle, the static contact is mounted on the first cover, and the auxiliary lead-out needle is mounted on the second cover.

[0008] According to some embodiments of the present invention, the two long sides are respectively a first long side and a second long side; the second cover body includes a first sub-cover and a second sub-cover, the first sub-cover is connected to a portion between two ends of the first long side, and the second sub-cover is connected to a portion between two ends of the second long side;

[0009] The first sub-cover comprises a first side wall and a second side wall connected to the first long side, and the inner recesses formed between the first side wall and the first long side and between the second side wall and the first long side are respectively a first inner recess and a second inner recess;

[0010] The second sub-cover includes a third side wall and a fourth side wall connected to the second long side, and the recessed portions formed between the third side wall and the second long side and between the fourth side wall and the second long side are respectively a third recessed portion and a fourth recessed portion, wherein the first recessed portion is arranged opposite to the third recessed portion, and the second recessed portion is arranged opposite to the fourth recessed portion.

[0011] According to some embodiments of the present invention, the magnetic steel includes a first magnetic steel and a second magnetic steel, the first magnetic steel is located in the first inner recess, the second magnetic steel is located in the third inner recess, and the polarities of the ends of the first magnetic steel and the second magnetic steel that are close to each other are opposite;

[0012] The yoke clamp includes a first plate portion, a second plate portion, a third plate portion, a fourth plate portion and a fifth plate portion, the second plate portion is connected to one side of the first plate portion, the third plate portion is connected to the other side of the first plate portion, the fourth plate portion is connected to a side of the second plate portion away from the first plate portion, and the fifth plate portion is connected to a side of the third plate portion away from the first plate portion; the fourth plate portion is in contact with a surface of the first magnetic steel away from the first long side, and the fifth plate portion is in contact with a surface of the second magnetic steel away from the second long side.

[0013] According to some embodiments of the present utility model, a first limiting structure is provided on a surface of the fourth plate portion close to the first magnetic steel, and the first magnetic steel is limited and fixed to the first limiting structure;

[0014] A second limiting structure is disposed on a surface of the fifth plate portion close to the second magnetic steel, and the second magnetic steel is limited and fixed to the second limiting structure.

[0015] According to some embodiments of the utility model, the first limiting structure includes a first limiting protrusion and a second limiting protrusion, the first magnetic steel has a first surface and a second surface opposite to each other along the height direction of the insulating cover, the first limiting protrusion abuts against the first surface, and the second limiting protrusion abuts against the second surface.

[0016] According to some embodiments of the utility model, the relay also includes a second shell, which is fixedly connected to the first shell, and the inner surface of the second shell is provided with a first positioning groove and a second positioning groove; the yoke clamp is provided with a first positioning protrusion and a second positioning protrusion at one end close to the second shell, the first positioning protrusion is limited to the first positioning groove, and the second positioning protrusion is limited to the second positioning groove.

[0017] According to some embodiments of the present utility model, the first positioning protrusion is arranged at an end of the fourth plate portion close to the second shell, and the second positioning protrusion is arranged at an end of the fifth plate portion close to the second shell.

[0018] According to some embodiments of the utility model, the relay also includes a yoke plate, which is located below the insulating cover; the fourth plate portion and the fifth plate portion are provided with a first supporting protrusion at one end close to the yoke plate, and the first supporting protrusion abuts against the upper surface of the yoke plate to form a wiring channel between the yoke clamp and the yoke plate.

[0019] According to some embodiments of the present invention, a second supporting protrusion is provided at one end of the second plate portion and the third plate portion close to the yoke plate, and the second supporting protrusion abuts against the upper surface of the yoke plate.

[0020] According to some embodiments of the utility model, the magnetic steel has a first side surface and a second side surface parallel to each other, and a third side surface connected between the first side surface and the second side surface, at least a portion of the first side surface is in contact with the outer surface of the insulating cover, the second side surface is in contact with the yoke clamp, and at least a portion of the third side surface is arranged in a gap between the yoke clamp and the insulating cover.

[0021] One embodiment of the above utility model has at least the following advantages or beneficial effects:

[0022] (1) The relay provided in the embodiment of the utility model provides a large placement space for the magnet by setting an inner recess on the side wall of the insulating cover, thereby increasing the volume of the magnet as much as possible to enhance the arc extinguishing ability; the magnet is fixed in the inner recess by a yoke clamp to ensure that the magnet does not protrude from the outside of the insulating cover, thereby not affecting the external dimensions of the relay.

[0023] (2) In the relay provided by the embodiment of the utility model, the static contact is installed on the first cover body, and the auxiliary lead-out needle is installed on the second cover body. An inner recess is formed between the side wall of the second cover body close to the long side and the long side. A magnetic steel is arranged in the inner recess, which can ensure the installation distance of the auxiliary lead-out needle without increasing the outer size of the relay. At the same time, the volume of the magnetic steel can be increased to enhance the arc extinguishing ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Shown is a top view of a relay provided by an embodiment of the utility model (the second housing is not shown);

[0025] Figure 2 Shown is an exploded view of a relay provided by an embodiment of the utility model (the first housing is not shown);

[0026] Figure 3 Shown is a bottom view of the second housing in the relay provided by the embodiment of the utility model;

[0027] Figure 4 Shown is a top view of a relay provided by an embodiment of the utility model;

[0028] Figure 5 It is shown that Figure 4 A cross-sectional view along line AA;

[0029] Figure 6 What is shown is a schematic diagram of the structure of the insulating cover in the relay provided by the embodiment of the utility model;

[0030] Figure 7 Shown is a top view of an insulating cover in a relay provided by an embodiment of the utility model;

[0031] Figure 8 What is shown is a schematic diagram of the structure of a yoke iron clip in a relay provided by an embodiment of the utility model;

[0032] Fig. 9 Shown is a front view of a yoke iron clip in a relay provided by an embodiment of the utility model;

[0033] Fig.10 Shown is a schematic diagram of an auxiliary reed in a relay provided in an embodiment of the utility model.

[0034] The following are the descriptions of the reference numerals:

[0035] 1-first shell; 2-insulating cover; 21-first cover body; 211-first long side; 212-second long side; 213-short side; 22-second cover body; 221-first sub-cover; 222-second sub-cover; 231-first inner recess; 232-second inner recess; 233-third inner recess; 234-fourth inner recess; 31-first yoke clamp; 311-first plate; 312-second plate; 3121-second supporting protrusion; 313-third plate; 314-fourth plate; 3141-first limiting protrusion; 3142-second limiting protrusion; 3143-third limiting protrusion; 3144-first positioning protrusion ;3145-first supporting protrusion;315-fifth plate portion;3151-second positioning protrusion;32-second yoke clamp;41-first magnetic steel;411-first side surface;412-second side surface;413-first sub-surface;414-second sub-surface;415-third sub-surface;42-second magnetic steel;43-third magnetic steel;44-fourth magnetic steel;5-second shell;51-first positioning groove;52-second positioning groove;6-yoke plate;7-static contact;81-first auxiliary lead-out needle;82-second auxiliary lead-out needle;83-third auxiliary lead-out needle;91-auxiliary moving spring;92-auxiliary normally open spring;93-auxiliary normally closed spring. DETAILED DESCRIPTION

[0036] 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.

[0037] See also Figures 1 to 10 As shown, this embodiment provides a relay, including a first shell 1, an insulating cover 2, a yoke clamp and a magnet, the insulating cover 2 is installed in the first shell 1, and the side wall of the insulating cover 2 is provided with an inner recess; the yoke clamp is installed between the first shell 1 and the insulating cover 2 to fix the magnet in the inner recess.

[0038] The relay provided in this embodiment provides a recessed portion on the side wall of the insulating cover 2 to leave a larger placement space for the magnet and increase the volume of the magnet as much as possible to enhance the arc extinguishing ability; the magnet is fixed in the recessed portion by a yoke clamp to ensure that the magnet does not protrude from the outside of the insulating cover 2, thereby not affecting the external dimensions of the relay.

[0039] In one embodiment, see Figure 1 , Figure 5 and Figure 6As shown, the first shell 1 is cylindrical; the insulating cover 2 includes a first cover body 21 and a second cover body 22, the first cover body 21 has two opposite long sides and two opposite short sides 213, and the long sides extend in a direction parallel to the radial direction of the first shell 1; the second cover body 22 protrudes outward from the long sides, and the inner cavity of the second cover body 22 is connected to the inner cavity of the first cover body 21, and an inner recess is formed between the side wall of the second cover body 22 close to the long sides and the long sides.

[0040] For example, the first shell 1 is generally cylindrical; see Figure 7 As shown, the two long sides of the first cover body 21 are respectively the first long side 211 and the second long side 212, the first long side 211 and the second long side 212 are both parallel to a diameter direction of the first shell 1, and the first long side 211 and the second long side 212 are respectively located on both sides of the diameter, and the short side 213 is perpendicular to the diameter, one of the short sides 213 is connected to one end of the first long side 211 and the second long side 212, and the other short side 213 is connected to the other end of the first long side 211 and the second long side 212, and there is a smooth transition between the first long side 211 and the short side 213, and there is a smooth transition between the second long side 212 and the short side 213.

[0041] The side wall of the second cover body 22 close to the long side is integrally formed with the long side, and a concave portion is formed between the side wall and the long side.

[0042] In this embodiment, see Figure 1 and Figure 7 As shown, the outer surface of the short side 213 is a plane, and the short side 213 is close to the inner wall of the first shell 1 to limit the yoke clamp.

[0043] In one embodiment, see Figure 6 As shown, the second cover body 22 includes a first sub-cover 221 and a second sub-cover 222, the first sub-cover 221 is connected to the portion between the two ends of the first long side 211, and the second sub-cover 222 is connected to the portion between the two ends of the second long side 212; the first sub-cover 221 includes a first side wall and a second side wall connected to the first long side 211, and the inner recesses formed between the first side wall and the first long side 211 and between the second side wall and the first long side 211 are respectively a first inner recess 231 and a second inner recess 232; the second sub-cover 222 includes a third side wall and a fourth side wall connected to the second long side 212, and the inner recesses formed between the third side wall and the second long side 212 and between the fourth side wall and the second long side 212 are respectively a third inner recess 233 and a fourth inner recess 234, wherein the first inner recess 231 is arranged opposite to the third inner recess 233, and the second inner recess 232 is arranged opposite to the fourth inner recess 234.

[0044] For example, see Figure 6 and Figure 7 As shown, the cross-section of the insulating cover 2 formed by the first cover body 21, the first sub-cover 221 and the second sub-cover 222 is generally in the shape of a cross. The first sub-cover 221 includes a first side wall and a second side wall connected to the first long side 211. The first side wall and the first long side 211 are integrally formed, and the inner recess formed between the first side wall and the first long side 211 is the first inner recess 231; the second side wall and the first long side 211 are integrally formed, and the inner recess formed between the second side wall and the first long side 211 is the second inner recess 232.

[0045] The first sub-cover 221 further includes a fifth side wall integrally formed between the first side wall and the second side wall, the fifth side wall being close to the inner surface of the first shell 1 . Exemplarily, the fifth side wall is parallel to the first long side 211 .

[0046] The second sub-cover 222 includes a third side wall and a fourth side wall connected to the second long side 212. The third side wall is integrally formed with the second long side 212, and the inner recess formed between the third side wall and the second long side 212 is a third inner recess 233; the fourth side wall is integrally formed with the second long side 212, and the inner recess formed between the fourth side wall and the second long side 212 is a fourth inner recess 234.

[0047] The second sub-cover 222 further includes a sixth side wall integrally formed between the third side wall and the fourth side wall. The sixth side wall is disposed opposite to the fifth side wall. Exemplarily, the sixth side wall is parallel to the fifth side wall.

[0048] It should be noted that the number of the inner recesses is not limited to four, but may also be one, two or three.

[0049] In this embodiment, the material of the insulating cover may be ceramic.

[0050] In one embodiment, see Figure 1 and Figure 7 As shown, the magnetic steel includes a first magnetic steel 41 and a second magnetic steel 42. The first magnetic steel 41 is located in the first inner recess 231, and the second magnetic steel 42 is located in the third inner recess 233. The polarities of the ends of the first magnetic steel 41 and the second magnetic steel 42 that are close to each other are opposite.

[0051] In this embodiment, the magnetic steel also includes a third magnetic steel 43 and a fourth magnetic steel 44, the third magnetic steel 43 is located in the second recessed portion 232, the fourth magnetic steel 44 is located in the fourth recessed portion 234, and the polarities of the ends of the third magnetic steel 43 and the fourth magnetic steel 44 that are close to each other are opposite, wherein the third magnetic steel 43 has the same polarity as the end of the first magnetic steel 41 that is close to the insulating cover 2, and the fourth magnetic steel 44 has the same polarity as the end of the second magnetic steel 42 that is close to the insulating cover 2.

[0052] See also Figure 2As shown, there are two yoke clamps, which are respectively named the first yoke clamp 31 and the second yoke clamp 32. The first yoke clamp 31 and the second yoke clamp 32 are relatively arranged at two ends of the first cover body 21. The technical solution of this embodiment is described in detail below taking the first yoke clamp 31 as an example.

[0053] For example, see Figure 8 and Fig. 9 As shown, the first yoke clamp 31 includes a first plate portion 311, a second plate portion 312, a third plate portion 313, a fourth plate portion 314 and a fifth plate portion 315 which are integrally formed, the second plate portion 312 is connected to one side of the first plate portion 311, the second plate portion 312 and the first plate portion 311 are arranged at an obtuse angle, the third plate portion 313 is connected to the other side of the first plate portion 311, the third plate portion 313 and the first plate portion 311 are arranged at an obtuse angle, and the fourth plate portion 314 is connected to a side of the second plate portion 312 away from the first plate portion 311, The fourth plate portion 314 is set at an obtuse angle with the second plate portion 312, the fifth plate portion 315 is connected to the side of the third plate portion 313 away from the first plate portion 311, and the fifth plate portion 315 is set at an obtuse angle with the third plate portion 313; the fourth plate portion 314 is parallel to the fifth plate portion 315, the fourth plate portion 314 is in contact with the surface of the first magnetic steel 41 away from the first long side 211, and the fifth plate portion 315 is in contact with the surface of the second magnetic steel 42 away from the second long side 212, thereby achieving fixation of the first magnetic steel 41 and the second magnetic steel 42.

[0054] The second yoke clamp 32 is used to fix the third magnetic steel 43 and the fourth magnetic steel 44 to the second inner recess 232 and the fourth inner recess 234, respectively. The structure of the second yoke clamp 32 is the same as that of the first yoke clamp 31, and will not be described again.

[0055] In this embodiment, the fourth plate portion 314 and the fifth plate portion 315 are both located between the plane where the fifth side wall is located and the plane where the sixth side wall is located, so as to ensure that the yoke iron clamp will not affect the external dimensions of the relay. Specifically, after the external dimensions of the insulating cover 2 are determined, the size of the first housing 1 is determined to be as small as possible to ensure that the insulating cover 2 can be installed in the cylindrical first housing 1. At this time, there is a gap between the side wall of the insulating cover 2 and the circumferential side wall of the first housing 1. The magnetic steel and the yoke iron clamp are installed in the gap to make full use of the internal space, thereby enhancing the arc extinguishing ability of the magnetic steel without increasing the external dimensions of the relay.

[0056] In one embodiment, the magnetic steel has a first side surface 411 and a second side surface 412 which are parallel to each other, and a third side surface connected between the first side surface 411 and the second side surface 412, at least a portion of the first side surface 411 is in contact with the outer surface of the insulating cover 2, the second side surface 412 is in contact with the yoke clamp, and at least a portion of the third side surface is set in a gap between the yoke clamp and the insulating cover 2.

[0057] The technical solution of this embodiment is described in detail below by taking the first magnetic steel 41 as an example.

[0058] The first magnetic steel 41 has a first side surface 411 and a second side surface 412 which are parallel to each other. At least a portion of the first side surface 411 is in contact with the outer surface of the first long side 211 , and the second side surface 412 is in contact with the fourth plate portion 314 .

[0059] The first magnetic steel 41 also has a third side surface connected between the first side surface 411 and the second side surface 412, wherein the third side surface includes at least two sub-surfaces, one of which is connected to one end of the first side surface 411 and the second side surface 412, and the other sub-surface is connected to the other end of the first side surface 411 and the second side surface 412.

[0060] In this embodiment, in order to increase the volume of the first magnetic steel 41, the first magnetic steel 41 is designed as a special-shaped structure, that is, on the basis of a conventional rectangular magnetic steel, it extends toward the direction close to the second plate portion 312. Figure 1 As shown, the third side surface includes a first sub-surface 413, a second sub-surface 414 and a third sub-surface 415, one side edge of the first sub-surface 413 is connected to one side edge of the first side surface 411, the other side edge of the first sub-surface 413 is connected to one side edge of the second side surface 412, the other side edge of the second side surface 412 is connected to one side edge of the second sub-surface 414, the other side edge of the second sub-surface 414 is connected to one side edge of the third sub-surface 415, and the other side edge of the third sub-surface 415 is connected to the other side edge of the first side surface 411.

[0061] The first sub-surface 413 is perpendicular to the first side surface 411 and is close to the second cover body 22 . The second sub-surface 414 is in contact with the second plate portion 312 . The third sub-surface 415 is perpendicular to the first side surface 411 and is neither in contact with the yoke clamp nor with the insulating cover 2 .

[0062] Due to the smooth transition between the first long side 211 and the short side 213, and at the same time, the first side surface 411 extends toward the second plate portion 312, so a portion of the first side surface 411 is in contact with the straight side portion of the first long side 211, and a gap is set between another portion of the first side surface 411 and the smooth transition portion of the first long side 211.

[0063] By providing the third sub-surface 415 , the first magnetic steel 41 is prevented from forming a sharp-angle structure, thereby reducing the risk of damage.

[0064] Therefore, the structure of the first magnetic steel 41 in this embodiment can not only ensure that the volume is as large as possible, but also facilitate production and processing and is not easily damaged.

[0065] It should be noted that the structures of the second magnetic steel 42 , the third magnetic steel 43 and the fourth magnetic steel 44 are the same as that of the first magnetic steel 41 , and are not described in detail herein.

[0066] In one embodiment, a first limiting structure is provided on the surface of the fourth plate portion 314 close to the first magnetic steel 41, and the first magnetic steel 41 is limited and fixed to the first limiting structure; a second limiting structure is provided on the surface of the fifth plate portion 315 close to the second magnetic steel 42, and the second magnetic steel 42 is limited and fixed to the second limiting structure. By providing the first limiting structure, the position of the first magnetic steel 41 can be limited and fixed to prevent the first magnetic steel 41 from loosening. By providing the second limiting structure, the position of the second magnetic steel 42 can be limited and fixed to prevent the second magnetic steel 42 from loosening, thereby ensuring the arc extinguishing effect of the first magnetic steel 41 and the second magnetic steel 42, and improving the stability and reliability of the relay.

[0067] It should be understood that the second yoke clamp 32 is also provided with a corresponding limiting structure to limit and fix the positions of the third magnetic steel 43 and the fourth magnetic steel 44 .

[0068] In one embodiment, see Figure 8 and Fig. 9 As shown, the first limiting structure includes a first limiting protrusion 3141 and a second limiting protrusion 3142. The first magnetic steel 41 has a first surface and a second surface opposite to each other along the height direction of the insulating cover 2. The first limiting protrusion 3141 abuts against the first surface, and the second limiting protrusion 3142 abuts against the second surface.

[0069] Exemplarily, the first limiting protrusion 3141 and the second limiting protrusion 3142 are both formed by stamping the fourth plate portion 314. The first limiting protrusion 3141 is close to the opening of the first shell 1, the second limiting protrusion 3142 is far away from the opening of the first shell 1, the first surface of the first magnetic steel 41 is close to the opening of the first shell 1, and the second surface of the first magnetic steel 41 is far away from the opening of the first shell 1. The first limiting protrusion 3141 abuts against the first surface, and the second limiting protrusion 3142 abuts against the second surface, so that the first magnetic steel 41 can be limited from moving along the axial direction of the first shell 1.

[0070] See also Figure 8 As shown, the first limiting structure also includes a third limiting protrusion 3143, which abuts against the first sub-surface 413 of the first magnetic steel 41. The third limiting protrusion 3143 cooperates with the second plate portion 312 to limit the movement of the first magnetic steel 41 along the radial direction of the first shell 1.

[0071] It should be understood that the second limiting structure is substantially the same as the first limiting structure, and will not be described in detail herein.

[0072] In one embodiment, see Figures 2 to 5as well as Figure 8 As shown, the relay also includes a second housing 5, which is fixedly connected to the first housing 1, and the inner surface of the second housing 5 is provided with a first positioning groove 51 and a second positioning groove 52; the yoke clamp is provided with a first positioning protrusion 3144 and a second positioning protrusion 3151 at one end close to the second housing 5, the first positioning protrusion 3144 is limited to the first positioning groove 51, and the second positioning protrusion 3151 is limited to the second positioning groove 52.

[0073] In this embodiment, the first positioning protrusion 3144 is disposed on one end of the fourth plate portion 314 close to the second shell 5 , and the second positioning protrusion 3151 is disposed on one end of the fifth plate portion 315 close to the second shell 5 .

[0074] Exemplarily, the first shell 1 is snap-fitted to the second shell 5 , and after the snap-fitting, the first positioning protrusion 3144 is limited to the first positioning groove 51 , and the second positioning protrusion 3151 is limited to the second positioning groove 52 , thereby fixing the yoke plate 6 , preventing the yoke clamp from loosening, and improving the anti-vibration performance.

[0075] In this embodiment, the first positioning groove 51 and the second positioning groove 52 can be formed by injection molding. The first positioning protrusion 3144 is plate-shaped, and the first positioning protrusion 3144 is integrally formed with the fourth plate portion 314. The first positioning protrusion 3144 has a first guiding slope to facilitate the first positioning protrusion 3144 to enter the first positioning groove 51.

[0076] The second positioning protrusion 3151 is plate-shaped and is integrally formed with the fifth plate portion 315 . The second positioning protrusion 3151 has a second guiding inclined surface to facilitate the second positioning protrusion 3151 to enter the second positioning groove 52 .

[0077] During assembly, glue or other adhesives may be applied to the outer surfaces of the first positioning protrusion 3144 and the second positioning protrusion 3151 so as to bond and fix them to the second shell 5 .

[0078] In one embodiment, see Figure 1 As shown, the relay further includes a static contact 7 and an auxiliary lead-out needle. The static contact 7 is mounted on the first cover 21 , and the auxiliary lead-out needle is mounted on the second cover 22 .

[0079] In this embodiment, there are two static contacts 7, one of which is used as a terminal for current inflow, and the other static contact 7 is used as a terminal for current outflow; the top of the first cover 21 is provided with two mounting holes, respectively used to mount the two static contacts 7. The second housing 5 is provided with two through holes, which correspond to the two mounting holes one by one, respectively, for allowing the static contacts 7 to pass through to the outside of the second housing 5.

[0080] The top of the second cover 22 is provided with a plug hole, and the auxiliary lead-out needle is inserted into the plug hole and connected with the auxiliary spring inside the insulating cover 2. Figure 1 As shown, the auxiliary lead-out needles include a first auxiliary lead-out needle 81, a second auxiliary lead-out needle 82 and a third auxiliary lead-out needle 83; see Fig.10 As shown, the auxiliary spring includes an auxiliary moving spring 91, an auxiliary normally open spring 92 and an auxiliary normally closed spring 93. The first auxiliary lead-out needle 81 is connected to the auxiliary moving spring 91, the second auxiliary lead-out needle 82 is connected to the auxiliary normally open spring 92, and the third auxiliary lead-out needle 83 is connected to the auxiliary normally closed spring 93.

[0081] The first auxiliary lead-out needle 81 is arranged at one end of the second cover body 22, and the second auxiliary lead-out needle 82 and the third auxiliary lead-out needle 83 are arranged at the other end of the second cover body 22. The distance between the first auxiliary lead-out needle 81 and the second auxiliary lead-out needle 82 and the third auxiliary lead-out needle 83 cannot be too small to ensure that the auxiliary movable spring has a certain length to prevent the auxiliary movable spring from fatigue fracture after repeated action.

[0082] In this embodiment, under the premise of ensuring the spacing between the first auxiliary lead-out needle 81 and the second auxiliary lead-out needle 82 and the third auxiliary lead-out needle 83, an inner concave portion is formed between the side wall of the second cover body 22 close to the long side and the long side, and the magnetic steel is arranged in the inner concave portion, which can leave a larger placement space for the magnetic steel and increase the volume of the magnetic steel as much as possible to enhance the arc extinguishing ability; at the same time, the magnetic steel will not protrude from the end of the second cover body 22, so as not to affect the external dimensions of the relay. Therefore, the setting of the insulating cover in this embodiment can ensure the installation distance of the auxiliary lead-out needles without increasing the outer dimensions of the relay, and at the same time, it can also increase the volume of the magnetic steel to enhance the arc extinguishing ability.

[0083] It should be noted that the structure and working principle of the relay and the auxiliary lead-out pin should be understandable to those skilled in the art, and are well known and easy to implement for those skilled in the art, so this embodiment will not be described in detail.

[0084] The edge of the second housing 5 is provided with an avoidance groove for the auxiliary contact signal line to pass through, and the auxiliary contact signal line is welded to the auxiliary lead-out pin.

[0085] In one embodiment, see Figure 2 and Figure 5 As shown, the relay further includes a yoke plate 6, which is located below the insulating cover 2; a first support protrusion 3145 is provided at one end of the fourth plate portion 314 and the fifth plate portion 315 close to the yoke plate 6, and the first support protrusion 3145 abuts against the upper surface of the yoke plate 6 to form a wiring channel between the yoke clamp and the yoke plate 6. The auxiliary contact signal line is connected to the first auxiliary lead-out pin 81 through a wire, and the wire passes through the wiring channel to limit the wire.

[0086] In this embodiment, the first supporting protrusion 3145 and the yoke clip are integrally formed.

[0087] In one embodiment, see Figure 8 As shown, a second supporting protrusion 3121 is disposed at one end of the second plate portion 312 and the third plate portion 313 close to the yoke plate 6 , and the second supporting protrusion 3121 abuts against the upper surface of the yoke plate 6 .

[0088] The second supporting protrusion 3121 can be provided to support and fix the second plate portion 312 and the third plate portion 313. In this embodiment, the second supporting protrusion 3121 is integrally formed with the yoke clip.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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: It includes a first shell, an insulating cover, a yoke clamp and a magnet. The insulating cover is installed in the first shell, and the side wall of the insulating cover is provided with an inner recess. The yoke clamp is installed between the first shell and the insulating cover to fix the magnet to the inner recess.

2. The relay according to claim 1, characterized in that: The first shell is cylindrical; the insulating cover includes a first cover body and a second cover body, the first cover body has two opposite long sides and two opposite short sides, and the long sides extend in a direction parallel to the radial direction of the first shell; the second cover body protrudes outside the long sides, the inner cavity of the second cover body is connected with the inner cavity of the first cover body, and the inner recess is formed between the side wall of the second cover body close to the long sides and the long sides.

3. The relay according to claim 2, characterized in that: It also includes a stationary contact and an auxiliary lead-out needle, wherein the stationary contact is mounted on the first cover, and the auxiliary lead-out needle is mounted on the second cover.

4. The relay according to claim 2, characterized in that: The two long sides are respectively a first long side and a second long side; the second cover body comprises a first sub-cover and a second sub-cover, the first sub-cover is connected to a portion between two ends of the first long side, and the second sub-cover is connected to a portion between two ends of the second long side; The first sub-cover comprises a first side wall and a second side wall connected to the first long side, and the inner recesses formed between the first side wall and the first long side and between the second side wall and the first long side are respectively a first inner recess and a second inner recess; The second sub-cover includes a third side wall and a fourth side wall connected to the second long side, and the recessed portions formed between the third side wall and the second long side and between the fourth side wall and the second long side are respectively a third recessed portion and a fourth recessed portion, wherein the first recessed portion is arranged opposite to the third recessed portion, and the second recessed portion is arranged opposite to the fourth recessed portion.

5. The relay according to claim 4, characterized in that: The magnetic steel comprises a first magnetic steel and a second magnetic steel, the first magnetic steel is located in the first inner recess, the second magnetic steel is located in the third inner recess, and the polarities of the ends of the first magnetic steel and the second magnetic steel that are close to each other are opposite; The yoke clamp includes a first plate portion, a second plate portion, a third plate portion, a fourth plate portion and a fifth plate portion, the second plate portion is connected to one side of the first plate portion, the third plate portion is connected to the other side of the first plate portion, the fourth plate portion is connected to a side of the second plate portion away from the first plate portion, and the fifth plate portion is connected to a side of the third plate portion away from the first plate portion; the fourth plate portion is in contact with a surface of the first magnetic steel away from the first long side, and the fifth plate portion is in contact with a surface of the second magnetic steel away from the second long side.

6. The relay according to claim 5, characterized in that: A first limiting structure is provided on a surface of the fourth plate portion close to the first magnetic steel, and the first magnetic steel is limited and fixed to the first limiting structure; A second limiting structure is disposed on a surface of the fifth plate portion close to the second magnetic steel, and the second magnetic steel is limited and fixed to the second limiting structure.

7. The relay according to claim 6, characterized in that: The first limiting structure includes a first limiting protrusion and a second limiting protrusion. The first magnetic steel has a first surface and a second surface opposite to each other along the height direction of the insulating cover. The first limiting protrusion abuts against the first surface, and the second limiting protrusion abuts against the second surface.

8. The relay according to claim 1, characterized in that: It also includes a second shell, which is fixedly connected to the first shell, and the inner surface of the second shell is provided with a first positioning groove and a second positioning groove; the yoke clamp is provided with a first positioning protrusion and a second positioning protrusion at one end close to the second shell, the first positioning protrusion is limited to the first positioning groove, and the second positioning protrusion is limited to the second positioning groove.

9. The relay according to claim 5, characterized in that: It also includes a yoke plate, which is located below the insulating cover; the fourth plate portion and the fifth plate portion are provided with a first supporting protrusion at one end close to the yoke plate, and the first supporting protrusion abuts against the upper surface of the yoke plate to form a wiring channel between the yoke clamp and the yoke plate.

10. The relay according to claim 9, characterized in that: A second supporting protrusion is disposed at one end of the second plate portion and the third plate portion close to the yoke plate, and the second supporting protrusion abuts against the upper surface of the yoke plate.

11. The relay according to any one of claims 1 to 10, characterized in that: The magnetic steel has a first side surface and a second side surface parallel to each other, and a third side surface connected between the first side surface and the second side surface, at least a portion of the first side surface is in contact with the outer surface of the insulating cover, the second side surface is in contact with the yoke clamp, and at least a portion of the third side surface is arranged in a gap between the yoke clamp and the insulating cover.

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