A lead-out pin fixing structure and an electromagnetic relay

Abstract

The application discloses a lead-out pin fixing structure and an electromagnetic relay. The lead-out pin fixing structure comprises a lead-out pin and a base. The base is provided with a socket, and the lead-out pin is inserted into the socket. The lead-out pin fixing structure further comprises an elastic clamping piece. The elastic clamping piece is arranged in the socket from one end of the socket, and the elastic clamping piece is buckled with the lead-out pin. The elastic clamping piece makes the lead-out pin abut against the inner side surface of the socket. The lead-out pin can be inserted and fixed without scraps, and the lead-out pin does not need to be fixed by glue. Therefore, the risk of increasing product non-conduction caused by plastic scraps can be avoided, and the problem that the plug-in force of the lead-out pin will be greatly reduced after the glue is softened at high temperature can be avoided.

Description

Technical Field

[0001] This invention relates to the field of relay technology, and in particular to a lead-out fixing structure and an electromagnetic relay. Background Technology

[0002] An electromagnetic relay is an electronic control device that is commonly used in automatic control circuits. It is essentially an "automatic switch" that uses a smaller current to control a larger current, thus playing roles such as automatic adjustment, safety protection, and circuit switching in circuits.

[0003] Electromagnetic relays typically consist of a magnetic circuit, a contact part, and a base. The leads of the magnetic circuit (i.e., coil leads) and the leads of the contact part (i.e., moving spring leads and / or stationary spring leads) are usually inserted into corresponding sockets in the base. To prevent the leads from wobbling or dislodging from the sockets, existing technologies typically employ two methods. The first is to create retainers or notches on the leads to achieve an interference fit with the socket. However, this method can cause friction between the retainers or notches and the inner surface of the socket, generating plastic shavings, which significantly increases the risk of the product failing to conduct. This is especially problematic in specialized fields such as high-speed rail and nuclear power, where contact continuity is critical, undoubtedly increasing risk management costs. The second method involves applying adhesive to the gap between the leads and the socket, using the adhesive to fix the leads after curing. However, the high-temperature stability of the adhesive is questionable, and the insertion and extraction force of the leads decreases significantly after the adhesive softens at high temperatures. Summary of the Invention

[0004] This invention addresses the technical problems existing in the prior art by providing a lead-out pin fixing structure and an electromagnetic relay, which uses elastic clips to fix the lead-out pins, thus solving the problems existing in the current relay lead-out pin fixing methods.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a lead-out foot fixing structure, including a lead-out foot and a base, the base having an insertion hole, the lead-out foot being inserted into the insertion hole; it also includes an elastic clip, the elastic clip being inserted into the insertion hole from one end of the insertion hole, and the elastic clip being snapped together with the lead-out foot, the elastic clip causing the lead-out foot to abut against the inner side of the insertion hole.

[0006] Furthermore, the limiting portion provided on the elastic clip and / or the lead-out foot restricts the movement of the lead-out foot along the depth direction of the insertion hole, and the limiting portion rests against the base.

[0007] Furthermore, the elastic clip smoothly engages with the inner surface of the socket; the elastic clip is located on one side of the lead-out foot in the thickness direction.

[0008] Furthermore, the lead-out pins include one or more of the following: relay coil lead-out pins, moving spring lead-out pins, and stationary spring lead-out pins.

[0009] Furthermore, the elastic locking element is provided with one or more wedge-shaped locking blocks, and the lead-out foot is provided with locking holes or slots that engage with the wedge-shaped locking blocks one by one.

[0010] Furthermore, the elastic clip includes at least one first arc-shaped bend protruding towards the lead-out foot and at least one second arc-shaped bend protruding away from the lead-out foot. The first and second arc-shaped bends are arranged alternately along the depth direction of the insertion hole, and adjacent first and second arc-shaped bends smoothly transition into each other. At least one first arc-shaped bend is provided with one or more wedge-shaped blocks, and the second arc-shaped bend contacts and engages with the inner surface of the insertion hole.

[0011] Furthermore, the elastic clip is V-shaped or W-shaped, and is inserted into the socket with its tip entering the socket first and both ends entering the socket later; the end of the elastic clip facing the lead-out foot is snapped together with the lead-out foot, and the other end of the elastic clip away from the lead-out foot contacts and engages with the inner surface of the socket.

[0012] Furthermore, the elastic card is divided into multiple cards arranged in parallel on the side facing the lead-out foot, and the end of each card is respectively engaged with a corresponding card platform, card slot or card hole provided on the lead-out foot.

[0013] Furthermore, the insertion hole includes a through hole extending through both ends and a recessed groove open at one end and closed at the other end, the through hole and the recessed groove being laterally connected; the lead-out foot is inserted into the through hole, and the portion of the lead-out foot in the through hole is adapted to the through hole; the elastic clip is inserted into the recessed groove from one end; the limiting part is located at the other end of the insertion hole.

[0014] Furthermore, the insertion hole is convex in shape, with a wide hole corresponding to the wide part of the convex shape and a narrow hole corresponding to the narrow part of the convex shape. The lead-out foot passes through the wide hole and moves into the narrow hole. The part of the lead-out foot in the narrow hole is adapted to the narrow hole. The elastic clip is located in the wide hole. There are two limiting parts, and the two limiting parts are located at the two ends of the narrow hole respectively.

[0015] Furthermore, the limiting part includes two limiting steps, which are located on opposite sides of the lead-out foot, and the step surfaces of the two limiting steps face inwards towards the depth of the insertion hole, and respectively rest against the base.

[0016] The present invention also provides an electromagnetic relay, including a magnetic circuit portion and a contact portion; it also includes a lead-out pin fixing structure as described above, wherein the lead-out pin includes one or more of the following: a coil lead-out pin of the magnetic circuit portion, a moving spring lead-out pin of the contact portion, and a stationary spring lead-out pin of the contact portion.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The elastic clip of the present invention is inserted into the insertion hole from one end, and the elastic clip is connected to the lead-out pin, preventing the elastic clip from falling out of the insertion hole. Simultaneously, the elastic clip causes the lead-out pin to abut against the inner side of the insertion hole, thereby increasing the insertion and extraction force of the lead-out pin. Therefore, the lead-out pin of the present invention can achieve chip-free insertion and does not require adhesive fixation. This avoids the risk of plastic debris increasing product conductivity and also avoids the problem of a significant decrease in the insertion and extraction force of the lead-out pin after the adhesive softens at high temperatures when using adhesive fixation.

[0019] 2. The elastic clip and / or the limiting part provided on the lead-out foot restricts the movement of the lead-out foot along the depth direction of the insertion hole, which can further improve the insertion and extraction force of the lead-out foot of the present invention.

[0020] 3. The elastic clip fits smoothly with the inner side of the insertion hole, which can further prevent the generation of plastic shavings.

[0021] 4. The elastic clip is generally wavy, V-shaped, or W-shaped, which makes the elastic clip structure simple, easy to form, and ensures a smooth fit between the elastic clip and the inner side of the socket.

[0022] 5. The limiting part includes the two limiting steps, which makes the structure of the limiting part simple and easy to form.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the lead pin fixing structure and electromagnetic relay of the present invention are not limited to the embodiments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the lead-out pin and elastic clip of the present invention in an exploded state, as shown in Embodiment 1.

[0025] Figure 2 This is Example 1 Figure 1 Enlarged schematic diagram of Part I;

[0026] Figure 3 This is a top view of the lead-out foot fixing structure of the present invention in Embodiment 1;

[0027] Figure 4 This is Example 1 Figure 3 AA section view;

[0028] Figure 5 This is Example 1 Figure 4 Enlarged schematic diagram of Part II;

[0029] Figure 6 This is Example 1 Figure 3 BB section view;

[0030] Figure 7 This is a front view of the electromagnetic relay of the present invention in Embodiment 1;

[0031] Figure 8 This is a left view of the electromagnetic relay of the present invention in Embodiment 1;

[0032] Figure 9 This is Example 1 Figure 8 CC section view;

[0033] Figure 10 This is a schematic diagram of the lead-out pin and elastic clip of the present invention in an exploded state, as shown in Embodiment 2.

[0034] Figure 11 This is a top view of the lead-out foot fixing structure of the present invention in Embodiment 2;

[0035] Figure 12 This is Example 2 Figure 11 DD sectional view;

[0036] Figure 13 This is Example 2 Figure 11 EE sectional view. Detailed Implementation

[0037] In this invention, the terms "first," "second," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "left," "right," "front," and "rear" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this invention. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0039] Example 1

[0040] Please see Figures 1-6 As shown, a lead-out pin fixing structure of the present invention is used for a relay, including a lead-out pin 1 and a base 2. The base 2 has a socket 21, and the lead-out pin 1 is inserted into the socket 21. It also includes an elastic retainer 3, which is inserted into the socket 21 from one end and is snapped into the lead-out pin 1 to prevent the elastic retainer 3 from exiting the socket 21. The elastic retainer 3 causes the lead-out pin 1 to abut against the inner side of the socket 21. A limiting part provided on the elastic retainer 3 and / or the lead-out pin 1 restricts the lead-out pin 1 from moving along the depth direction of the socket 21, and the limiting part rests against the base 2. The socket 21 is vertically continuous, and the lead-out pin 1 is inserted into the socket 21 from top to bottom. The elastic retainer 3 is inserted into the socket 21 from the lower end. The lead-out pin 1 is a sheet-shaped pin with a square cross-section. The elastic clip 3 is located on one side of the lead-out pin 1 in the thickness direction. The portion of the elastic clip 3 away from the lead-out pin 1 in the thickness direction contacts and engages with the inner surface of the socket 21, and the elastic clip 3 engages smoothly with the inner surface of the socket 21.

[0041] In this embodiment, as Figure 2 As shown, the elastic locking member 3 is provided with one or more wedge-shaped locking blocks 33, and the lead-out foot 1 is provided with locking holes 11 that engage with the wedge-shaped locking blocks 33 one by one. The locking holes 11 are located in the thickness direction of the lead-out foot 1 and pass through both ends of the lead-out foot 1 in the thickness direction. The locking holes 11 can be replaced by locking grooves or the like. The number of wedge-shaped locking blocks 33 and locking holes 11 is specifically two, but not limited to this. The two locking holes 11 are arranged along the width direction of the lead-out foot 1, and the positions of the two wedge-shaped locking blocks 33 correspond one-to-one with the two locking holes 11.

[0042] In this embodiment, as Figure 2As shown, the elastic clip 3 includes at least one first arc-shaped bend 31 protruding towards the lead-out foot 1 and at least one second arc-shaped bend 32 protruding away from the lead-out foot 1. The first arc-shaped bend 31 and the second arc-shaped bend 32 are arranged alternately along the depth direction of the insertion hole 21, and adjacent first arc-shaped bends 31 and second arc-shaped bends 32 are smoothly transitioned. Specifically, there is one first arc-shaped bend 31 and two second arc-shaped bends 32, but this is not limited to these. The first arc-shaped bend 31 is located between two second arc-shaped bends 32. The first arc-shaped bend 31 is provided with the wedge-shaped locking block 33, and each second arc-shaped bend 32 contacts and engages with the inner surface of the insertion hole 21. Thus, the elastic clip 3 is approximately wavy, which not only improves the elastic deformation capability of the elastic clip 3 but also ensures a smooth engagement between the elastic clip 3 and the inner surface of the insertion hole 21.

[0043] In this embodiment, the insertion hole 21 includes a through hole 211 extending through both ends and a recessed groove 212 open at one end and closed at the other. The through hole 211 and the recessed groove 212 are laterally connected. The lead-out foot 1 is inserted into the through hole 211, and the portion of the lead-out foot 1 in the through hole 211 is adapted to the through hole 211. That is, the shape and size of the portion of the lead-out foot 1 in the through hole 211 are consistent with or substantially consistent with the shape and size of the through hole 211, so that the lead-out foot 1 will not or substantially not be displaced along the width and thickness directions of the lead-out foot 1 in the through hole 211. Specifically, the lower end of the recessed groove 212 is open and the upper end is closed. The elastic retainer 3 is inserted into the recessed groove 212 from one end (i.e., the lower end) and is restricted by the upper end of the recessed groove 212, so that the elastic retainer 3 cannot move upward in the recessed groove 212. The limiting part is located at the other end of the insertion hole 21, specifically, the limiting part is located at the upper end of the insertion hole 21, such as... Figure 6 As shown.

[0044] In this embodiment, as Figure 1 As shown, the limiting part includes two limiting steps 12, which are located on opposite sides of the lead-out foot 1 in the width direction. The step surfaces of the two limiting steps 12 face the inward direction of the insertion hole 21 and rest against the upper surface of the base 2. Figure 6 As shown. In other embodiments, the limiting part is a retaining ring or the like that fitted onto the lead-out foot.

[0045] In this invention, a lead-out pin fixing structure is provided. When assembling the lead-out pin 1, the lead-out pin 1 is first inserted from top to bottom into the through hole 211 of the insertion hole 21 of the base 2. Then, the wedge-shaped locking blocks 33 of the elastic locking member 3 face the lead-out pin 1, and the elastic locking member 3 is inserted from bottom to top into the recess 212 of the insertion hole 21 of the base 2. During the insertion of the elastic locking member 3 into the recess 212, the inclined surfaces of each wedge-shaped locking block 33 of the elastic locking member 3 provide guidance, ensuring smooth insertion of the elastic locking member 3. The elastic locking member 3 is in a compressed state. When the elastic locking member 3 is in place, each wedge-shaped locking block 33 of the elastic locking member 3 engages in its corresponding locking hole 11. Figure 5 As shown, this effectively prevents the elastic clip 3 from moving downwards. Simultaneously, the elastic clip 3 elastically resets, with each of its second arc-shaped bends 32 contacting the inner side of the recess 212 away from the lead-out foot 1, and its first arc-shaped bend 31 abutting against the lead-out foot 1. This causes the lead-out foot 1 to abut against the inner side of the through hole 211 away from the recess 212, making the lead-out foot 1 more stable and less prone to wobbling within the through hole 211. After assembly, the step surfaces of the two limiting steps 12 of the lead-out foot 1 rest against the upper surface of the base 2, thus restricting the downward movement of the lead-out foot 1. Since the elastic clip 3 will not move upwards under the limitation of the recess 212, and the elastic clip 3 is snapped together with the lead-out foot 1, the elastic clip 3 forms an upper limit on the lead-out foot 1, preventing it from moving upwards. In addition, the elastic clip 3 provides elastic support to the lead-out pin 1, so that the lead-out pin 1 abuts against the inner side of the socket 21, and the lead-out pin 1 will not be displaced in the width or thickness direction in the through hole 211. Therefore, the lead-out pin 1 can be firmly confined in the socket 21, thereby greatly improving the insertion and extraction force of the lead-out pin 1.

[0046] When the lead-out pin fixing structure of the present invention is applied to a relay, the lead-out pin includes one or more of the following: a moving spring lead-out pin, a stationary spring lead-out pin, and a coil lead-out pin. The moving spring lead-out pin can be integrally formed with the moving spring or separately set. Similarly, the stationary spring lead-out pin can be integrally formed with the stationary spring or separately set.

[0047] The present invention provides a lead-out pin fixing structure, which realizes a chip-free insertion method for the lead-out pin and eliminates the need for glue fixation. This avoids the risk of plastic chips increasing the product's non-conductivity and also avoids the problem of a significant decrease in insertion and extraction force after the glue softens at high temperatures when using glue fixation.

[0048] Please see Figures 7-9 As shown, an electromagnetic relay of the present invention includes a magnetic circuit portion 4 and a contact portion 5; it also includes a lead-out pin fixing structure as described above, wherein the lead-out pin includes one or more of the following: a coil lead-out pin of the magnetic circuit portion, a moving spring lead-out pin of the contact portion, and a stationary spring lead-out pin of the contact portion.

[0049] Specifically, there are multiple leads and sockets, and each lead corresponds to a socket. Each socket is equipped with an elastic clip 3. Some leads are leads of the magnetic circuit part 4, and the rest are leads of the contact part 5.

[0050] In this embodiment, the lead-out pin of the magnetic circuit portion 4 is the coil lead-out pin 6, and the lead-out pin of the contact portion 5 is the moving spring lead-out pin and / or the stationary spring lead-out pin. In this embodiment, the lead-out pin of the contact portion 5 is specifically the stationary spring lead-out pin 7, and the stationary spring lead-out pin 7 is integrally formed with the stationary spring of the contact portion 5, but is not limited thereto. The magnetic circuit portion 4 is horizontal, and the moving spring of its contact portion 5 is connected to the armature portion of the magnetic circuit portion 4. There are two stationary springs, and stationary contacts are respectively provided on the opposite inner surfaces of the tops of the two stationary springs, making the electromagnetic relay of the present invention a changeover relay, but is not limited thereto. In other embodiments, the electromagnetic relay of the present invention is a normally open relay or a normally closed relay.

[0051] For details regarding the structure and working principle of the lead-pin fixing structure of this electromagnetic relay, please refer to the preceding description; further details will not be repeated here.

[0052] Example 2

[0053] Please see Figures 10-13 As shown, the lead-out pin fixing structure and electromagnetic relay of the present invention differ from the above-described embodiment 1 in that: the elastic clip 3 is V-shaped, and the elastic clip 3 is inserted into the socket 21 with its tip entering the socket 21 first and both ends entering the socket 21 later; the end of the elastic clip 3 facing the lead-out pin 1 is snapped together with the lead-out pin 1, and the other side of the elastic clip 3 away from the lead-out pin 1 contacts and engages with the inner surface of the socket 21. In other embodiments, the elastic clip is W-shaped.

[0054] In this embodiment, the elastic clip 3 is divided into multiple cards 34 arranged side by side on the side facing the lead-out foot 1. The end of each card 34 is respectively engaged with a corresponding card holder 13 provided on the lead-out foot 1. Specifically, there are two cards 34, but it is not limited to this. There are also two card holders 13, and the two card holders 13 are located on opposite sides of the lead-out foot 1 in the width direction. The card holders can be replaced by card holes or card slots, etc.

[0055] In this embodiment, the insertion hole 21 is convex in shape, with a wide hole 213 corresponding to the wide part of the convex shape and a narrow hole 214 corresponding to the narrow part of the convex shape. The lead-out foot 1 passes through the wide hole 213 and moves into the narrow hole 214. The part of the lead-out foot 1 in the narrow hole 214 is adapted to the narrow hole 214, that is, the shape and size of the part of the lead-out foot 1 in the narrow hole 214 are the same as or substantially the same as the shape and size of the narrow hole 214, so that the lead-out foot 1 will not or substantially not move along the width direction of the lead-out foot 1 in the narrow hole 214. The elastic clip 3 is located in the wide hole 213. There are two limiting parts, and the two limiting parts are located at both ends of the narrow hole 214 respectively.

[0056] In this embodiment, the two limiting parts each include two limiting steps. The two limiting steps are located on opposite sides of the lead-out foot 1 in the width direction, and the step surfaces of the two limiting steps face the inward direction of the insertion hole 21, and respectively abut against the base 2. Specifically, the step surfaces of the two upper limiting steps 12 abut against the upper surface of the base 2, and the step surfaces of the two lower limiting steps 14 abut against the lower end of the base 2, as shown below. Figure 13 As shown. In this embodiment, a recessed platform is provided inside the lower end of the narrow hole 214. Therefore, the step surfaces of the two lower limiting steps 14 respectively enter the lower end of the narrow hole 214 and rest against the recessed platform. However, this is not limited to this. In other embodiments, the step surfaces of the two lower limiting steps respectively rest against the lower surface of the base. The two lower limiting steps 14 and the two locking platforms 13 are arranged at the same horizontal position, but this is not limited to this.

[0057] In this invention, a lead-out fixing structure and an electromagnetic relay are provided. When assembling the lead-out 1, the lead-out 1 is first passed from top to bottom through the wide hole 213 of the socket 21, using the wide hole 213 to avoid the lower limiting portion (i.e., the two lower limiting steps 14). Then, the lead-out 1 is moved into the narrow hole 214 of the socket 21, using the narrow hole 214 to restrict the movement of the lead-out 1 along its width direction. Next, the elastic clip 3 is inserted into the wide hole 213 of the socket 21 from below the base 2, with its tip entering the socket 21 first and both ends following. During the insertion of the elastic clip 3, its two sides are compressed and brought together, allowing the elastic clip 3 to be smoothly inserted into the wide hole 213. Furthermore, the elastic clip 3 makes smooth contact with the inner surface of the wide hole 213, preventing the generation of plastic debris. When the elastic clip 3 is inserted into place, both sides of the elastic clip 3 elastically return to their original position, causing the ends of its two cards 34 to respectively engage with the two card platforms 13 of the lead-out pin 1, such as... Figure 12As shown, this provides a downward anti-retraction effect to the elastic clip 3. Simultaneously, the elastic clip 3 provides elastic force to the lead-out foot 1, causing it to abut against the narrow hole 214 away from the inner side of the wide hole 213, thus preventing displacement of the lead-out foot 1 in its thickness direction. After assembly, the width and thickness directions of the lead-out foot 1 are limited. Simultaneously, the step surfaces of the two upper limiting steps 12 of the lead-out foot 1 rest against the upper surface of the base 2, and the step surfaces of the two lower limiting steps 14 of the lead-out foot 1 rest against the recessed platform inside the lower end of the narrow hole 214, as shown. Figure 13 As shown, lead 1 is also limited in the length direction (i.e., the depth direction of the socket), preventing lead 1 from moving up and down relative to the base 2. Therefore, lead 1 can be firmly confined in the socket 21 of the base 2, thereby greatly improving the insertion and extraction force of lead 1.

[0058] The present invention provides a lead-out pin fixing structure and an electromagnetic relay. The parts not described herein are the same as or can be implemented using existing technologies.

[0059] The above embodiments are only used to further illustrate a lead-out pin fixing structure and an electromagnetic relay of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A lead-out pin fixing structure, comprising a lead-out pin and a base, wherein the base is provided with a socket, and the lead-out pin is inserted into the socket; characterized in that: It also includes a flexible clip, which is inserted into the socket from one end and is connected to the lead-out foot by a snap-fit, and the flexible clip causes the lead-out foot to abut against the inner side of the socket; The elastic clip includes at least one first arc-shaped bend extending towards the lead-out pin and at least one second arc-shaped bend extending away from the lead-out pin, the first and second arc-shaped bends being alternately arranged along the depth direction of the insertion hole; or, The elastic clip is V-shaped or W-shaped, and is inserted into the socket with its tip entering the socket first and both ends entering the socket later.

2. The lead-out foot fixing structure according to claim 1, characterized in that: The limiting part provided on the lead-out foot restricts the movement of the lead-out foot along the depth direction of the insertion hole, and the limiting part rests against the base.

3. The lead-out foot fixing structure according to claim 1, characterized in that: The elastic clip smoothly engages with the inner side of the socket; the elastic clip is located on one side of the lead-out pin in the thickness direction; the lead-out pin includes one or more of the following: coil lead-out pin, moving spring lead-out pin, and stationary spring lead-out pin of a relay.

4. The lead-out foot fixing structure according to claim 1, 2, or 3, characterized in that: The elastic locking member, including the first arc-shaped bend and the second arc-shaped bend, is provided with one or more wedge-shaped locking blocks, and the lead-out foot is provided with locking holes or slots that engage with the wedge-shaped locking blocks one by one.

5. The lead-out foot fixing structure according to claim 4, characterized in that: The adjacent first arc-shaped bend and the second arc-shaped bend are smoothly transitioned; at least one of the first arc-shaped bends is provided with one or more wedge-shaped blocks, and the second arc-shaped bend contacts and engages with the inner surface of the insertion hole.

6. The lead-out pin fixing structure according to claim 1, 2, or 3, characterized in that: The V-shaped or W-shaped elastic clip is snapped together with the lead-out foot on one side, while the other side of the elastic clip away from the lead-out foot contacts and engages with the inner side of the socket.

7. The lead-out foot fixing structure according to claim 6, characterized in that: The elastic clip, which is V-shaped or W-shaped, is divided into multiple cards arranged in parallel on the side facing the lead-out foot. The end of each card is respectively locked onto a corresponding card platform, card slot, or card hole on the lead-out foot.

8. The lead-out foot fixing structure according to claim 2, characterized in that: The insertion hole includes a through hole with both ends and a recessed groove that is open at one end and closed at the other end. The through hole and the recessed groove are laterally connected. The lead-out foot is inserted into the through hole, and the part of the lead-out foot in the through hole is adapted to the through hole. The elastic clip is inserted into the recessed groove from one end. The limiting part is located at the other end of the insertion hole.

9. The lead-out foot fixing structure according to claim 2, characterized in that: The insertion hole is convex in shape, with a wide hole corresponding to the wide part of the convex shape and a narrow hole corresponding to the narrow part of the convex shape. The lead-out foot passes through the wide hole and moves into the narrow hole. The part of the lead-out foot in the narrow hole is adapted to the narrow hole. The elastic clip is located in the wide hole. There are two limiting parts, which are located at both ends of the narrow hole.

10. The lead-out pin fixing structure according to claim 8 or 9, characterized in that: The limiting part includes two limiting steps, which are located on opposite sides of the lead-out foot, and the step surfaces of the two limiting steps face inwards towards the depth of the insertion hole, and rest against the base respectively.

11. An electromagnetic relay, comprising a magnetic circuit portion and a contact portion; characterized in that: It also includes a lead-out pin fixing structure as described in any one of claims 1-10, wherein the lead-out pin includes one or more of the following: a coil lead-out pin in the magnetic circuit portion, a moving spring lead-out pin in the contact portion, and a stationary spring lead-out pin in the contact portion.

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