relay

Abstract

Provided in the present disclosure is a relay, which is provided with pin terminals which are respectively used for carrying a current inflow or outflow, wherein an end portion of each pin terminal that is used for being engaged with the outside is provided with at least two engagement portions arranged in a spaced manner in the width direction of the pin terminal, and the cross-sectional area of an end portion of each engagement portion gradually tapers towards a tail end thereof, so as to form a tip shape. When the pin terminals of the present application are withdrawn from a solder pot, molten solder is more easily separated, thereby reducing solder projection defects, facilitating product management and control, and avoiding subsequent machining processes caused by the solder projection defects; and the tip shapes may reduce the contact areas between the molten solder and the engagement portions, such that the tail ends of the engagement portions can enter the molten solder and pierce the surface of the molten solder, so as to prevent the exposure of copper caused by insufficient soldering, thereby ensuring a firm soldered connection between the relay and a PCB when the relay is applied to the PCB.

Description

Relay

[0001] The present disclosure claims priority to Chinese patent application No. 202422374064.X, filed on September 27, 2024, the entire contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates to a relay. BACKGROUND

[0003] The prior art relay generally comprises a housing and a magnetic circuit portion and a contact portion housed in the housing, wherein the contact portion is provided with pin terminals connected to the outside, the pin terminals comprising input terminals for bearing current input and output terminals for bearing current output; the contact portion is driven by the magnetic circuit portion to be connected or disconnected. The pin terminals are generally subjected to tin plating treatment to achieve better solderability, protection and conductivity, but in practice it is found that the existing pin terminals are subjected to tin plating by dipping, and after tin plating, there are problems of tin tip pull-up failure or copper exposure. When the relay is soldered to the PCB, if the pin terminals have tin tips, it may cause the length of each pin terminal to be unable to be accurately controlled, and the excess tin tips need to be reprocessed, increasing the production process; if copper is exposed, it cannot be used for soldering to the PCB or is unreliable when soldering. SUMMARY

[0004] The present disclosure aims to overcome the above-mentioned defects or problems existing in the background art, and provides a relay whose pin terminals are less likely to have problems of tin tip pull-up failure or copper exposure.

[0005] To achieve the above-mentioned purpose, the present disclosure and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0006] The related embodiments provide a relay provided with pin terminals for bearing current inflow or outflow, respectively, the end of the pin terminals for joining to the outside is provided with at least two joining portions arranged at intervals along the width direction of the pin terminals, and the cross-sectional area of the end of the joining portion gradually decreases towards the tip end to form a tip shape.

[0007] In at least one of the embodiments, the tip shape is formed by reducing the size of at least one direction on the joining portion.

[0008] In at least one of the embodiments, the outer wall of the joining portion is provided with an inclined surface forming the tip shape.

[0009] In at least one of the embodiments, the inclined surface comprises two first inclined surfaces facing away from each other along the thickness direction of the joining portion, and the first inclined surfaces extend along the width direction of the joining portion.

[0010] In at least one of the embodiments, the first inclined surface has an angle of greater than or equal to 10° and less than or equal to 20° with respect to the extending direction of the pin terminal.

[0011] In at least one of the embodiments, the inclined surface further comprises two second inclined surfaces facing away from each other along the width direction of the joint, and the second inclined surfaces extend along the thickness direction of the joint.

[0012] In at least one of the embodiments, the second inclined surface has an angle of greater than or equal to 45° and less than or equal to 55° with respect to the extending direction of the pin terminal.

[0013] In at least one of the embodiments, the outer wall of the joint is provided with a curved surface for forming a pointed end shape.

[0014] In at least one of the embodiments, a receiving member is further included, the pin terminal penetrates through the receiving member, and the outer wall of the receiving member is provided with a glue groove around the pin terminal, and the depth of the glue groove is greater than or equal to 2 mm.

[0015] In at least one of the embodiments, the pin terminal is provided with a body, each joint is integrated with the body, and the two sides of the body along the width direction are provided with first grooves extending along the thickness direction thereof near the joints.

[0016] In at least one of the embodiments, the two sides of the joint along the thickness direction are further provided with second grooves extending along the width direction thereof near the body.

[0017] In at least one of the embodiments, the depth and width of the first grooves are greater than those of the second grooves, and the first grooves are closer to the receiving member than the second grooves.

[0018] In at least one of the embodiments, the widths of the joints are consistent, and the width of each joint is greater than the width of the gap between adjacent joints.

[0019] From the above description of the present disclosure and its preferred embodiments, it can be seen that, relative to the prior art, the technical solutions of the present disclosure and its preferred embodiments have the following beneficial effects due to the use of the following technical means:

[0020] The inventors of the present disclosure have found through continuous observation, experiment and research that the technical problem of the prior art that the tin tip is pulled up high or copper is exposed after the tin is applied on the pin terminal, and when the relay is used for welding with the PCB, if the pin terminal has a tin tip, the length of each pin terminal cannot be accurately controlled, and the excess tin tip needs to be reprocessed, increasing the production process; if the copper is exposed, it cannot be used for welding with the PCB or cannot be reliably welded.

[0021] In at least one embodiment, since the pin terminal needs to carry a large current, the current-carrying area is large, and the end surface is relatively flat and large in area, the pin terminal cannot completely pierce the surface of the tin liquid when the tin is applied, the adhesion of the tin liquid is not enough, and the pin terminal cannot be completely covered, resulting in partial exposure of the copper. Because the pin terminal has a relatively flat end surface and a large end surface area, the liquid is not easily separated from the end surface of the pin terminal when it is pulled out of the tin furnace, thereby easily producing a tin tip pulled up high.

[0022] In at least one embodiment, the end portion of the pin terminal used for engaging to the outside is provided with at least two engaging portions spaced apart along the width direction of the pin terminal. Compared with the scheme in which the pin terminal forms a single engaging portion, this scheme is more conducive to avoiding the problems of tin tip pulled up high and copper exposed when the width of the pin terminal is too large. The cross-sectional area of the end portion of the engaging portion gradually decreases towards the tip, on the one hand, when the pin terminal is pulled out of the tin furnace, the tin liquid is more easily separated, thereby reducing the tin tip defect, facilitating product control and avoiding subsequent processing procedures caused by tin tip defects; on the other hand, the tip shape can reduce the contact area of the tin liquid with the engaging portion, thereby facilitating the end of the engaging portion to enter the tin liquid and pierce the surface of the tin liquid, avoiding the exposure of copper caused by incomplete tin application, thereby ensuring the firm welding of the relay and the PCB when the relay is applied to the PCB. In addition, when the relay is applied to the relay, the pin terminal with a tip shape is also conducive to the insertion of the pin terminal into the jack of the PCB, thereby facilitating assembly.

[0023] In at least one embodiment, the outer wall of the engaging portion is provided with an inclined surface forming a tip shape, which is conducive to production and processing.

[0024] In at least one of the embodiments, the included angle between the first inclined surface and the extension direction of the pin terminal is greater than or equal to 10° and less than or equal to 20°, the small angle setting ensures the current carrying strength of the pin terminal, and further makes the tin liquid better wrap the pin terminal and flow, avoids the appearance defect caused by the tin tip being pulled up, and avoids the inability to weld or firm welding caused by copper exposure.

[0025] In at least one of the embodiments, the inclined surface further includes two second inclined surfaces facing away from each other along the width direction of the joint, and the second inclined surfaces extend along the thickness direction of the joint, further reducing the size and end area of the joint in the width direction, so that when the joint is tinned, the tin liquid better wraps the pin terminal and flows, avoids the appearance defect caused by the tin tip being pulled up, and is also beneficial to avoid the inability to weld or firm welding caused by copper exposure.

[0026] In at least one of the embodiments, the included angle between the second inclined surface and the extension direction of the pin terminal is greater than or equal to 45° and less than or equal to 55°, which is beneficial to better form the tip shape, so that the tin liquid better wraps the pin terminal and flows, avoids the appearance defect caused by the tin tip being pulled up, and is also beneficial to avoid the inability to weld or firm welding caused by copper exposure.

[0027] In at least one of the embodiments, the outer wall of the joint is provided with a curved surface for forming the tip shape, which provides another way for forming the tip shape.

[0028] In at least one of the embodiments, the outer wall of the accommodating member surrounds the pin terminal and is provided with a glue groove, and the depth of the glue groove is greater than or equal to 2mm, so that the glue can be applied between the pin terminal and the outer wall of the accommodating member for sealing, thereby further improving the sealing performance of the relay and the adaptability to the external environment, and improving the insulation performance between adjacent pin terminals.

[0029] In at least one of the embodiments, the pin terminal is provided with a body, each joint is integrated with the body, and the first groove extending along the thickness direction of the body is arranged on both sides of the body close to the joint in the width direction. On the one hand, it is beneficial to processing and ensures the strength of the pin terminal, and on the other hand, the arrangement of the first groove can avoid the glue climbing along the pin terminal when the glue groove is full, which causes poor contact of the welding surface of the joint.

[0030] In at least one of the embodiments, the second groove extending along the width direction of the body is further arranged on both sides of the joint close to the body in the thickness direction, which further avoids the glue climbing along the pin terminal, which causes poor contact of the welding surface of the joint.

[0031] In at least one of the embodiments, the two sides of the body along the width direction have a smaller area, and the glue solution reaches the end of the joint more quickly through the two sides. The two surfaces of the body along the thickness direction have a larger area, and the glue solution has a large diffusion area and a slow speed when reaching the end of the joint through the two surfaces. Therefore, by setting the depth and width of the first groove to be larger than the second groove, the glue solution diffusion of different side surfaces of the pin terminal is set, so as to achieve a better glue isolation effect and reduce the influence on the current carrying area.

[0032] In at least one of the embodiments, the width of each joint is consistent, and the width of each joint is greater than the width of the gap between adjacent joints, so as to ensure that the end of the pin terminal is easily shaped into a pointed end shape, while the size of the end of the pin terminal is not excessively reduced, thereby ensuring that the pin terminal still has good current carrying capacity. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed in the embodiment description are briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art without creative labor.

[0034] FIG. 1 is a perspective exploded view of a relay according to an embodiment of the present disclosure;

[0035] FIG. 2 is a schematic view of a relay according to an embodiment of the present disclosure with a hidden shell;

[0036] FIG. 3 is a front view of a pin terminal according to an embodiment of the present disclosure;

[0037] FIG. 4 is a side view of a pin terminal according to an embodiment of the present disclosure.

[0038] Main reference signs:

[0039] In the drawings: 10. accommodating member; 11. base; 12. shell; 13. first side wall; 14. through slot; 15. glue groove; 20. pin terminal; 21. body; 211. first groove; 22. joint; 221. first inclined surface; 222. second inclined surface; 223. second groove; 30. movable contact; 31. movable spring; 311. movable contact point; 32. movable spring lead-out piece; 40. stationary contact; 41. stationary contact point; 50. coil assembly; 60. armature assembly. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present disclosure will be described clearly and completely in combination with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are the preferred embodiments of the present disclosure, and should not be regarded as exclusive to other embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure.

[0041] In the claims, the specification, and the drawings of the present disclosure, unless otherwise clearly defined, the terms such as "first", "second", or "third" are used to distinguish different objects, and are not used to describe a specific sequence.

[0042] In the claims, the specification, and the drawings of the present disclosure, unless otherwise clearly defined, for the terms of orientation, such as "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "back", "left", "right", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation and position relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present disclosure.

[0043] In the claims, the specification, and the drawings of the present disclosure, unless otherwise clearly defined, the terms such as "fixedly connected" or "fixedly connected" should be understood broadly, that is, any connection mode between the two without displacement relationship and relative rotation relationship, that is, it includes non-detachable fixed connection, detachable fixed connection, integration and fixed connection through other devices or elements.

[0044] In the claims, the specification, and the drawings of the present disclosure, the terms "include", "have" and their variants are intended to mean "contain but not limited to".

[0045] Referring to Fig. 1, a relay is shown, which is provided with pin terminals 20 for respectively bearing current inflow or outflow. In the embodiment, the relay comprises a housing 10 and a contact portion, the housing 10 comprises a base 11 and a cover 12, Fig. 1 shows the structure of the base 11 and the cover 12 in the embodiment, referring to Fig. 1, the base 11 is a box-like structure with one end open, the length direction of the base 11 is the X-axis direction, the width direction is the Y-axis direction, and the height direction is the Z-axis direction, in the embodiment, the base 11 is open at one end along the Z-axis direction, the cover 12 is adapted to cover the opening of the base 11 and is fixedly connected with the base 11, in the embodiment, the opening is located at the upper end of the base 11, the base 11 is provided with a bottom wall perpendicular to the Z-axis direction and a first side wall 13 perpendicular to the Y-axis direction. Two through grooves 14 are arranged on the first side wall 13 along the X-axis direction, referring to Fig. 2, Fig. 2 shows a schematic view of the pin terminal 20 penetrating the first side wall 13, in the embodiment, the pin terminal 20 penetrates the through groove 14 of the first side wall 13 (still referring to Fig. 1), the outer surface of the first side wall 13 is also provided with a glue groove 15 around the pin terminal 20, the depth of the glue groove 15 is greater than or equal to 2mm.

[0046] In practical application, the relay further comprises a magnetic circuit portion, the contact portion is driven to be on or off by the magnetic circuit portion. The magnetic circuit portion generally comprises a coil assembly 50 fixed relative to the housing 10 and an armature assembly 60 driven by the coil assembly 50 to rotate relative to the housing 10, the specific structure of the magnetic circuit portion can adopt the prior art, which will not be described herein. In the embodiment, referring to Figs. 1-2, the contact portion comprises a moving contact 30 and a stationary contact 40, the moving contact 30 comprises a moving spring 31 and a moving spring lead-out piece 32; the moving spring 31 is fixed at one end along its length direction in the base 11, the other end is adapted to cooperate with the armature assembly 60 and is provided with a moving contact point 311, the moving contact point 311 is adapted to be driven by the armature assembly 60 to close or disconnect with the stationary contact 40. The moving spring lead-out piece 32 is fixedly connected with the moving spring 31 and located on the side of the moving spring 31 away from the stationary contact 40, so as to improve the contact stability of the moving spring 31 and the stationary contact 40 in the current flow state, it penetrates one of the through grooves 14 of the first side wall 13 to form one of the pin terminals 20, in the embodiment, the moving spring lead-out piece 32 is fixedly connected with the fixed end of the moving spring 31 and is limitedly matched with the base 11 to be fixed in the housing 10. The stationary contact 40 extends along the Y-axis direction and is fixed in the base 11, the stationary contact 40 is provided with a stationary contact point 41 and penetrates the other through groove 14 of the first side wall 13 to form the other pin terminal 20.

[0047] Referring to FIGS. 2-4, FIG. 3-4 shows a schematic view of the pin terminal, in the embodiment, the pin terminal 20 is in a flat structure extending along the Y-axis direction, the pin terminal 20 is provided with a body 21, the pin terminal 20 is used to be connected to the external end (the part extending out of the container 10) provided with at least two connecting parts 22 arranged at intervals along the width direction of the pin terminal 20 (consistent with the Z-axis direction shown in FIG. 1), each connecting part 22 is integrated with the body 21, the body 21 is closer to the container 10 than the connecting part 22, the two sides of the body 21 close to the connecting part 22 are provided with a first groove 211 extending along the thickness direction (consistent with the X-axis direction shown in FIG. 1), the cross-sectional area of the end of the connecting part 22 gradually decreases towards the end to form a pointed end, the purpose of forming the pointed end of the end of the connecting part 22 is to make the connecting part 22 more easily pierce the surface of the tin liquid and enter the tin liquid, and the tin liquid more easily flow and separate, the pointed end is formed by reducing the size of at least one direction on the connecting part 22. For example, in the embodiment, the pointed end of the end of the connecting part 22 can be formed by reducing the size in one direction (such as the width direction), or by reducing the size in more than two directions (such as the width direction and the thickness direction, etc.), or by reducing the size in the whole circumferential direction, the end surface of the end of the connecting part 22 can be presented in a sharp point, a sharp angle or a small area end surface. In the embodiment, the outer wall of the connecting part 22 is provided with an inclined surface forming the pointed end. Specifically, the inclined surface includes two first inclined surfaces 221 facing away from each other along the thickness direction of the connecting part 22 and two second inclined surfaces 222 facing away from each other along the width direction of the connecting part 22, the first inclined surface 221 extends along the width direction of the connecting part 22, and the second inclined surface 222 extends along the thickness direction of the connecting part 22. Among them, the included angle β of the first inclined surface 221 relative to the extension direction of the pin terminal 20 is greater than or equal to 10° and less than or equal to 20°, as shown in FIG. 4, in the example given in the embodiment, the included angle β of the first inclined surface 221 relative to the extension direction of the pin terminal 20 is 11°. The included angle α of the second inclined surface 222 relative to the extension direction of the pin terminal 20 is greater than or equal to 45° and less than or equal to 55°, as shown in FIG. 3, in the example given in the embodiment, the included angle α of the second inclined surface 222 relative to the extension direction of the pin terminal 20 is 45°. It should be understood that in other embodiments, the outer wall of the connecting part 22 is provided with a curved surface for forming the pointed end, as long as the end of the connecting part 22 can form a pointed end.

[0048] The two sides of the connecting part 22 in the thickness direction are also provided with a second groove 223 extending along the width direction close to the body 21. The depth and width of the first groove 211 are greater than the depth and width of the second groove 223, and the first groove 211 is closer to the container 10 than the second groove 223. In the embodiment, the width of each connecting part 22 is consistent, and the width of each connecting part 22 is greater than the width of the gap between adjacent connecting parts 22.

[0049] In the embodiment, the pin terminal 20 needs to bear a large current, and the current-carrying area is large. The end part of the pin terminal 20 used for bonding to the outside is provided with at least two bonding parts 22 arranged at intervals along the width direction of the pin terminal 20. Compared with the scheme in which the pin terminal 20 forms one bonding part 22, the embodiment is more conducive to avoiding tin tip pull-up and copper exposure caused by excessive width of the pin terminal 20, and provides conditions for the bonding part 22 to form a pointed end shape. The cross-sectional area of the end part of the bonding part 22 gradually decreases towards the tip to form a pointed end shape. On the one hand, after the pin terminal 20 is thus arranged, the tin liquid is more easily separated when the pin terminal 20 is pulled out of the tin furnace, thereby reducing tin tip defects, facilitating product control, and avoiding subsequent processing procedures caused by tin tip defects. On the other hand, the pointed end shape can reduce the contact area of the tin liquid with the bonding part 22, thereby facilitating the tip of the bonding part 22 to enter the tin liquid and pierce the surface of the tin liquid, avoiding copper exposure caused by incomplete tinning, and thereby ensuring firm welding of the relay to the PCB when the relay is applied to the PCB. In addition, when the relay is applied to the relay, the pointed end shape is also conducive to the insertion of the pin terminal 20 into the insertion hole of the PCB, thereby facilitating assembly.

[0050] In the embodiment, the outer wall of the bonding part 22 is provided with an inclined surface forming a pointed end shape, which is conducive to production and processing.

[0051] In the embodiment, the inclined surface includes two first inclined surfaces 221 that are away from each other along the thickness direction of the bonding part 22. The first inclined surface 221 extends along the width direction of the bonding part 22 to reduce the size and end area of the bonding part 22 in the thickness direction, so that the tin liquid better wraps the pin terminal 20 and flows when the bonding part 22 is tinned, avoiding appearance defects caused by tin tip pull-up, and also being conducive to avoiding copper exposure caused by inability to weld or firm welding. This advantage is more prominent when the width of the bonding part 22 is large.

[0052] In the embodiment, the included angle of the first inclined surface 221 with respect to the extension direction of the pin terminal 20 is greater than or equal to 10° and less than or equal to 20°. The small angle setting ensures the current-carrying strength of the pin terminal 20, and further enables the tin liquid to better wrap the pin terminal 20 and flow, thereby avoiding appearance defects caused by tin tip pull-up, and avoiding inability to weld or firm welding caused by copper exposure.

[0053] In the embodiment, the inclined surface further comprises two second inclined surfaces 222 which are away from each other along the width direction of the joint 22, and the second inclined surfaces 222 extend along the thickness direction of the joint 22, further reducing the size and the end area of the joint 22 in the width direction, so that when the joint 22 is tinned, the tin liquid can better wrap the pin terminal 20 and flow, avoiding the appearance defect caused by the tin tip being pulled up, and also being conducive to avoiding the inability to weld or firm welding caused by copper exposure.

[0054] In the embodiment, the included angle of the second inclined surface 222 relative to the extension direction of the pin terminal 20 is greater than or equal to 45° and less than or equal to 55°, which is conducive to better wrapping the pin terminal 20 by the tin liquid and flowing, avoiding the appearance defect caused by the tin tip being pulled up, and also being conducive to avoiding the inability to weld or firm welding caused by copper exposure.

[0055] In the embodiment, the outer wall of the joint 22 is provided with a curved surface for forming a pointed end shape, providing another way for forming a pointed end shape.

[0056] In the embodiment, the outer wall of the accommodation member 10 surrounds the pin terminal 20 and is provided with a glue groove 15, and the depth of the glue groove 15 is greater than or equal to 2 mm, so that the pin terminal 20 and the outer wall of the accommodation member 10 can be sealed by dispensing glue therebetween, thereby further improving the sealing performance of the relay and the adaptability to the external environment, and improving the insulation performance between adjacent pin terminals 20.

[0057] In the embodiment, the pin terminal 20 is provided with a body 21, each joint 22 is integrated with the body 21, and the two sides of the body 21 in the width direction close to the joint 22 are provided with first grooves 211 extending along the thickness direction thereof, which is conducive to processing and ensures the strength of the pin terminal 20, and on the other hand, the setting of the first grooves 211 can avoid the glue in the glue groove 15 from climbing along the pin terminal 20 to cause poor contact of the welding surface of the joint 22.

[0058] In the embodiment, the two sides of the joint 22 in the thickness direction are also provided with second grooves 223 extending along the width direction thereof close to the body 21, which further avoids the glue from climbing along the pin terminal 20 to cause poor contact of the welding surface of the joint 22.

[0059] In the embodiment, the area of the two sides of the body 21 in the width direction is small, and the glue liquid will reach the end of the joint 22 more quickly through the two sides, and the area of the two surfaces of the body 21 in the thickness direction is large, so that the glue liquid diffuses through the two surfaces and reaches the end of the joint 22 slowly. Therefore, by setting the depth and width of the first grooves 211 to be larger than those of the second grooves 223, the glue diffusion of different side surfaces of the pin terminal 20 is set, so as to achieve better glue isolation effect and reduce the influence on the current-carrying area.

[0060] In this embodiment, the width of each joint 22 is uniform, and the width of each joint 22 is greater than the width of the gap between adjacent joints 22, which ensures that the end of the pin terminal 20 is easily shaped into a pointed end shape while the size of the end of the pin terminal 20 is not excessively reduced, thereby ensuring that the pin terminal 20 still has good current carrying capacity.

[0061] The above description and the embodiment are used to explain the scope of protection of the present disclosure, but do not constitute a limitation on the scope of protection of the present disclosure. Through the inspiration of the present disclosure or the above-mentioned embodiment, the modification, equivalent replacement or other improvement of the embodiment of the present disclosure or one part of the technical features obtained by the person skilled in the art combining with the common knowledge, the ordinary technical knowledge and / or the prior art in the field through logical analysis, reasoning or limited test should be included in the protection scope of the present disclosure.

Claims

1. A relay characterized by, The pin terminal (20) for respectively bearing current inflow or outflow is provided with at least two engaging portions (22) arranged along the width direction of the pin terminal (20), and the cross-sectional area of the engaging portion (22) end gradually decreases towards the tip end to form a pointed shape.

2. The relay of claim 1, wherein The pointed shape is formed by reducing the size of at least one direction on the engaging portion (22).

3. The relay of claim 1, wherein, The outer wall of the engaging portion (22) is provided with an inclined surface for forming a pointed shape.

4. The relay of claim 3 wherein, The inclined surface includes two first inclined surfaces (221) facing away from each other along the thickness direction of the engaging portion (22), and the first inclined surfaces (221) extend along the width direction of the engaging portion (22).

5. The relay of claim 4 wherein, The included angle (β) of the first inclined surface (221) with respect to the extension direction of the pin terminal (20) is greater than or equal to 10° and less than or equal to 20°.

6. The relay of claim 5 wherein, The inclined surface also includes two second inclined surfaces (222) facing away from each other along the width direction of the engaging portion (22), and the second inclined surfaces (222) extend along the thickness direction of the engaging portion (22).

7. The relay of claim 6 wherein, The included angle (α) of the second inclined surface (222) with respect to the extension direction of the pin terminal (20) is greater than or equal to 45° and less than or equal to 55°.

8. The relay of claim 1 wherein, The outer wall of the engaging portion (22) is provided with a curved surface for forming a pointed shape.

9. The relay according to any one of claims 1 to 8, characterized in that It also includes a container (10); the pin terminal (20) penetrates the container (10); the outer wall of the container (10) surrounds the pin terminal (20) and is provided with a glue groove (15), and the depth of the glue groove (15) is greater than or equal to 2mm.

10. The relay of claim 9, wherein the relay is configured to: The pin terminal (20) is provided with a body (21), each engaging portion (22) is integrated with the body (21), and the two sides of the body (21) near the engaging portion (22) are provided with a first groove (211) extending along the thickness direction.

11. The relay of claim 10, wherein the relay is configured to: The two sides of the engaging portion (22) near the body (21) are provided with a second groove (223) extending along the width direction.

12. The relay of claim 11, wherein the relay is configured to: The depth and width of the first groove (211) are greater than the depth and width of the second groove (223), and the first groove (211) is closer to the container (10) than the second groove (223).

13. The relay of claim 1, wherein, The width of each engaging portion (22) is consistent, and the width of each engaging portion (22) is greater than the width of the gap between the adjacent two engaging portions (22).

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