Pin mechanism

Abstract

The utility model discloses a stitch mechanism, relates to the welding equipment technical field, wherein the stitch mechanism comprises a driving assembly and a stitch assembly, the stitch assembly comprises a first stitch piece and a second stitch piece, the first stitch piece and the second stitch piece are connected to the driving end of the driving assembly, the driving assembly is used for driving the first pin piece and the second pin piece to be inserted into the two welding holes of the circuit board respectively and connected with the welding holes. According to the technical scheme provided by the utility model, the problem that the position of the flexible circuit board is easy to deviate in the mode of adsorbing and transferring the flexible circuit board by the existing suction nozzle structure is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, and particularly relates to a pin mechanism. Background Art

[0002] When producing electronic products, it is necessary to transfer a flexible circuit board to the product and align the welding holes of the flexible circuit board with the pads of the product for welding. Due to its material characteristics, the flexible circuit board has certain flexibility and bendability, with a relatively thin and light structure and a small overall size. When transferring the flexible circuit board, the traditional transfer method is a suction nozzle structure. However, due to the small size of the flexible circuit board, it is difficult to provide an effective adsorption position for the suction nozzle structure, and during the transfer process, due to the resilience generated by the flexibility of the flexible circuit board, the flexible circuit board will shift in position, resulting in inaccurate alignment between the welding holes of the circuit board and the pads of the product when placing the circuit board, with low accuracy. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a pin mechanism, aiming to solve the problem that the flexible circuit board is prone to position deviation in the way of adsorbing and transferring the flexible circuit board by the existing suction nozzle structure.

[0004] To achieve the above purpose, the utility model provides a pin mechanism for positioning a circuit board. At least two welding holes are provided on the circuit board, including: a driving component; and a pin component. The pin component includes a first pin piece and a second pin piece. The first pin piece and the second pin piece are connected to the driving end of the driving component. The driving component is used to drive the first pin piece and the second pin piece to move. The first pin piece and the second pin piece are respectively inserted into two of the welding holes of the circuit board and connected to the welding holes.

[0005] In an embodiment, the driving component includes a Y-axis driving member and a rotary driving member. The rotary driving member is connected to the driving end of the Y-axis driving member. The first pin piece and the second pin piece are connected to the driving end of the rotary driving member.

[0006] In an embodiment, the driving component further includes an X-axis driving member. The X-axis driving member is connected to the driving end of the rotary driving member. The first pin piece is connected to the fixed end of the X-axis driving member. The second pin piece is connected to the driving end of the X-axis driving member. The X-axis driving member is used to drive the second pin piece to move relatively closer to or farther away from the first pin piece.

[0007] In one embodiment, the first pin member is provided with a first insertion portion for plugging and mating with the soldering hole. The first insertion portion is conical, and the diameter of the first insertion portion gradually decreases in a direction approaching the circuit board; and / or, the second pin member is provided with a second insertion portion for plugging and mating with the soldering hole. The second insertion portion is conical, and the diameter of the second insertion portion gradually decreases in a direction approaching the circuit board.

[0008] In one embodiment, the first pin member is made of an elastic material; and / or, the second pin member is made of an elastic material.

[0009] In one embodiment, the first pin member includes a first support rod, a first pin, and a first spring. The first support rod is connected to the driving end of the driving component. The first pin is movably disposed on the first support rod. One end of the first spring abuts against the first support rod, and the other end of the first spring abuts against the first pin; and / or, the second pin member includes a second support rod, a second pin, and a second spring. The second support rod is connected to the driving end of the driving component. The second pin is movably disposed on the second support rod. One end of the second spring abuts against the second support rod, and the other end of the second spring abuts against the second pin.

[0010] In one embodiment, the first support rod is provided with a first connection hole along its length direction. The first pin is movably disposed in the first connection hole, and the first spring is sleeved outside the first pin.

[0011] In one embodiment, the first connection hole includes a first hole section and a second hole section. The diameter of the first hole section is larger than that of the second hole section; the first pin has a first connection portion and a second connection portion. The diameter of the first connection portion is larger than that of the second connection portion; the first connection portion extends into the first hole section. The first spring is disposed in the first hole section and sleeved outside the first connection portion. The second connection portion extends into the second hole section and is at least partially exposed outside the second hole section.

[0012] In one embodiment, the first support rod is linearly arranged, the second support rod is bent, and the first pin and the second pin are arranged in parallel.

[0013] In one embodiment, the outer wall of the first support rod protrudes outwardly with a positioning portion and forms a mating space below the positioning portion. The second support rod is bent toward the first support rod, and the bent end portion of the second support rod partially extends into the mating space.

[0014] Compared with the prior art, the pin mechanism provided by the present utility model has the following beneficial effects:

[0015] In the technical solution of the present utility model, by providing a first pin member and a second pin member, the first pin member and the second pin member can be inserted into two welding holes of the circuit board and are connected in cooperation with the welding holes, so that the circuit board can be positioned. By the way of plugging and matching of the two pin members, the position of the circuit board on the pin assembly can be kept from shifting; the driving assembly can drive the pin assembly to drive the circuit board to move, so as to stably transfer the circuit board to the product. During this process, the position of the circuit board relative to the pin assembly does not shift. Therefore, after the circuit board is placed, the welding holes of the circuit board can be accurately aligned with the pads of the product, and the alignment accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the pin mechanism of the present utility model;

[0018] Figure 2 It is one of the schematic diagrams of the partial structure of an embodiment of the pin mechanism of the present utility model;

[0019] Figure 3 It is the second of the schematic diagrams of the partial structure of an embodiment of the pin mechanism of the present utility model;

[0020] Figure 4 It is an exploded schematic diagram of an embodiment of the partial structure of the pin mechanism of the present utility model;

[0021] Figure 5 It is a schematic diagram of the mating structure of an embodiment of the product and the circuit board of the present utility model.

[0022] Explanation of the reference numerals in the drawings:

[0023] 100, Pin mechanism; 211, X-axis drive member; 213, Rotary drive member; 22, Pin assembly; 221, First pin member; 2211, First insertion portion; 2212, First support rod; 2213, First pin; 2214, First spring; 2215, First connection hole; 2216, Positioning portion; 222, Second pin member; 2221, Second insertion portion; 2222, Second support rod; 2223, Second pin; 2224, Second spring; 2225, Second connection hole; 210, Circuit board; 220, Welding hole; 230, Product; 240, Pad.

[0024] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0028] Please refer to Figures 1 to 5, the present utility model provides a pin mechanism 100 for positioning a circuit board 210. At least two welding holes 220 are provided on the circuit board 210, including: a driving component (not marked in the figure); and a pin component 22. The pin component 22 includes a first pin member 221 and a second pin member 222. The first pin member 221 and the second pin member 222 are connected to the driving end of the driving component. The driving component is used to drive the first pin member 221 and the second pin member 222 to move. The first pin member 221 and the second pin member 222 are respectively inserted into two of the welding holes 220 of the circuit board 210 and connected to the welding holes 220.

[0029] Specifically, the pin mechanism 100 is used to position the circuit board 210 so as to stably transfer the circuit board 210 without displacement during the transfer process, so that when the circuit board 210 is placed, the welding holes 220 of the circuit board 210 are accurately aligned with the pads 240 of the product 230. The circuit board 210 refers to a small-sized flexible circuit board 210.

[0030] The driving component is used to drive the pin component 22 to move. The pin component 22 is arranged as a first pin member 221 and a second pin member 222. The first pin member 221 and the second pin member 222 are inserted into two welding holes 220 of the circuit board 210. Therefore, there is no situation where an effective connection position cannot be provided for the pin component 22 on the small-sized circuit board 210. The welding holes 220 to be aligned are directly used as the connection parts for plug-in connection. The specific structure of the driving component can be set according to the actions to be achieved by the pin component 22. The driving component drives the first pin member 221 and the second pin member 222 to move so that the first pin member 221 and the second pin member 222 are inserted into two welding holes 220 of the circuit board 210. During the subsequent transfer process of the circuit board 210, even if the circuit board 210 is deformed, through the plug-in positioning of the first pin member 221 and the second pin member 222, the positions of the welding holes 220 of the circuit board 210 on the pin component 22 will not shift, so that when the circuit board 210 is placed, the welding holes 220 of the circuit board 210 are accurately aligned with the pads 240 of the product 230, improving the alignment accuracy.

[0031] Such as Figure 3 and Figure 5 , the first pin member 221 and the second pin member 222 can pass through the circuit board 210 to be aligned with the pads 240 of the product 230, so that the welding holes 220 of the circuit board 210 are more accurately aligned with the pads 240 of the product 230, making the circuit board 210 and the product 230 have a higher matching accuracy.

[0032] The specific structures of the first pin member 221 and the second pin member 222 can be set according to the shape of the welding holes 220. The first pin member 221 and the second pin member 222 are detachably connected to the welding holes 220 of the circuit board 210. The fitting method can be interference fit, tight fit, etc., or connection components such as snap members can be provided for connection, or magnetic attraction or other methods can be used for connection, as long as the first pin member 221 and the second pin member 222 can be inserted into the two welding holes 220 and connected to the welding holes 220.

[0033] In the technical solution of the present utility model, by providing the first pin member 221 and the second pin member 222, the first pin member 221 and the second pin member 222 can be inserted into the two welding holes 220 of the circuit board 210 and are connected in cooperation with the welding holes 220, so that the position of the circuit board 210 can be positioned. By the way of inserting and matching the two pin members, the position of the circuit board 210 on the pin assembly 22 can be kept from shifting; the driving assembly can drive the pin assembly 22 to drive the circuit board 210 to move, so as to stably transfer the circuit board 210 to the product 230. During this process, the position of the circuit board 210 relative to the pin assembly 22 does not shift. Therefore, after the circuit board 210 is placed, the welding holes 220 of the circuit board 210 can be accurately aligned with the pads 240 of the product 230, and the alignment accuracy is high.

[0034] In an embodiment of the present utility model, the driving assembly includes a Y-axis driving member (not shown in the figure) and a rotation driving member 213. The rotation driving member 213 is connected to the driving end of the Y-axis driving member, and the first pin member 221 and the second pin member 222 are connected to the driving end of the rotation driving member 213.

[0035] It should be noted that, as Figure 5 , a specific embodiment is provided. One end of the circuit board 210 is connected to the product 230, and the other end is provided with welding holes 220. The position of the circuit board 210 on the product 230 is uncertain. Therefore, according to the requirement that the pin assembly 22 needs to be accurately inserted into the two welding holes 220 of the circuit board 210, the first driving assembly is set as the Y-axis driving member and the rotation driving member 213, so that the pin assembly 22 has the function of rotating and moving along the Y-axis direction, and the positions of the first pin member 221 and the second pin member 222 can be adjusted, so that the first pin member 221 and the second pin member 222 can accurately penetrate into the two welding holes 220 of the circuit board 210, which is convenient for positioning the position of the circuit board 210.

[0036] In an embodiment of the present utility model, the driving assembly further includes an X-axis driving member 211. The X-axis driving member 211 is connected to the driving end of the rotary driving member 213. The first pin member 221 is connected to the fixed end of the X-axis driving member 211. The second pin member 222 is connected to the driving end of the X-axis driving member 211. The X-axis driving member 211 is configured to drive the second pin member 222 to move relatively closer to or farther away from the first pin member 221.

[0037] Specifically, an X-axis driving member 211 is further provided. The first pin member 221 is connected to the fixed end of the X-axis driving member 211 to form a fixed pin member; the second pin member 222 is connected to the driving end of the X-axis driving member 211 to form a movable pin member.

[0038] By setting the two pin members, one is fixed and the other is movable, and the driving assembly is configured to drive the second pin member 222 to move closer to or farther away from the fixed first pin member 221, so that the distance between the first pin member 221 and the second pin member 222 can be adjusted, enabling the first pin member 221 and the second pin member 222 to be more accurately inserted into two welding holes 220 of the circuit board 210. At the same time, it can also adapt to circuit boards 210 of various sizes, improving the application range.

[0039] After the first pin member 221 and the second pin member 222 are inserted into the welding holes 220, the second pin member 222 can be adjusted to move away from the first pin member 221, appropriately increasing the distance between the first pin member 221 and the second pin member 222, so that the two pin members can pull the circuit board 210 to support the circuit board 210, facilitating better driving of the circuit board 210 to move.

[0040] In an embodiment of the present utility model, the first pin member 221 is provided with a first insertion portion 2211 for plugging and cooperating with the welding hole 220. The first insertion portion 2211 is conical, and the diameter of the first insertion portion 2211 gradually decreases in the direction towards the circuit board 210; and / or, the second pin member 222 is provided with a second insertion portion 2221 for plugging and cooperating with the welding hole 220. The second insertion portion 2221 is conical, and the diameter of the second insertion portion 2221 gradually decreases in the direction towards the circuit board 210.

[0041] In one embodiment, the first insertion portion 2211 of the first pin member 221 is set to be conical, and at the same time, the second insertion portion 2221 of the second pin member 222 is also set to be conical. In another embodiment, only the first insertion portion 2211 of the first pin member 221 is set to be conical, or only the second insertion portion 2221 of the second pin member 222 is set to be conical.

[0042] It should be understood that the mating manner between the first pin member 221 and the soldering hole 220 of the circuit board 210 is set as the mating of the tapered portion with the soldering hole 220. When the first pin member 221 is inserted into the soldering hole 220, the first insertion portion 2211 will gradually extend into the soldering hole 220. Through pressure, the first pin member 221 and the soldering hole 220 are tightly mated, with stable and reliable connection. Moreover, the installation and disassembly are relatively convenient, with low cost, capable of achieving lossless connection without damaging the circuit board 210, having strong adaptability, being able to adapt to soldering holes 220 with different apertures of various circuit boards 210, and having a wide application range.

[0043] The mating manner between the second pin member 222 and the soldering hole 220 of the circuit board 210 is also the mating of the tapered portion with the soldering hole 220, and its effect is similar to that of the first pin member 221. For details, reference can be made to the description of the first pin member 221 above, and no further elaboration will be given here.

[0044] By setting the distance between the first pin member 221 and the second pin member 222 to be adjustable, and the first pin member 221 and the second pin member 222 form a tapered fit with the soldering hole 220, the pin mechanism 100 can adapt to circuit boards 210 of various different sizes, with a wide application range.

[0045] In an embodiment of the present invention, the first pin member 221 is made of an elastic material; and / or, the second pin member 222 is made of an elastic material.

[0046] In one embodiment, both the first pin member 221 and the second pin member 222 are made of an elastic material. In another embodiment, only the first pin member 221 is made of an elastic material, or only the second pin member 222 is made of an elastic material.

[0047] It is worth noting that when the first pin member 221 is made of an elastic material, the elastic first pin member 221 can provide a certain self-positioning ability, making the insertion process with the soldering hole 220 smoother. Due to the flexibility of the elastic material, the first pin member 221 can adapt to the size change of the soldering hole 220 to a certain extent, improving the reliability of the connection with the circuit board 210; at the same time, during the assembly process, the elastic first pin member 221 can reduce the stress on the soldering hole 220, avoiding damage to the circuit board 210 caused by improper insertion.

[0048] When the second pin member 222 is made of an elastic material, its effect is similar to that of the first pin member 221. For details, reference can be made to the description of the first pin member 221 above, and no further elaboration will be given here.

[0049] In an embodiment of the present utility model, the first pin member 221 includes a first support rod 2212, a first pin 2213, and a first spring 2214. The first support rod 2212 is connected to the driving end of the driving assembly. The first pin 2213 is movably disposed on the first support rod 2212. One end of the first spring 2214 abuts against the first support rod 2212, and the other end of the first spring 2214 abuts against the first pin 2213; and / or, the second pin member 222 includes a second support rod 2222, a second pin 2223, and a second spring 2224. The second support rod 2222 is connected to the driving end of the driving assembly. The second pin 2223 is movably disposed on the second support rod 2222. One end of the second spring 2224 abuts against the second support rod 2222, and the other end of the second spring 2224 abuts against the second pin 2223.

[0050] Specifically, in one embodiment, the first pin member 221 is configured as a cooperating structure of the first support rod 2212, the first pin 2213, and the first spring 2214, and at the same time, the second pin member 222 is also configured as a cooperating structure of the second support rod 2222, the second pin 2223, and the second spring 2224. In another embodiment, only the first pin member 221 is configured as a cooperating structure of the first support rod 2212, the first pin 2213, and the first spring 2214, or only the second pin member 222 is configured as a cooperating structure of the second support rod 2222, the second pin 2223, and the second spring 2224.

[0051] By configuring the first pin member 221 as the first support rod 2212, the first pin 2213, and the first spring 2214, the first pin 2213 is movably disposed on the first support rod 2212 through the first spring 2214. The first pin 2213 has a first insertion portion 2211. When the first pin 2213 is inserted into the welding hole 220, the first spring 2214 forms a telescopic first pin 2213, which can absorb the impact force and effectively prevent the circuit board 210 from being damaged during the perforation process. If the insertion is improper, it can reduce the mechanical stress and damage that may be generated due to the hard contact between the first pin member 221 and the circuit board 210. After the insertion is in place, the spring can continuously provide a certain elastic force to ensure a good connection between the first pin member 221 and the welding hole 220.

[0052] The second pin member 222 is configured as the second support rod 2222, the second pin 2223, and the second spring 2224. The second pin 2223 has a second insertion portion 2221. The effect of the second pin member 222 is similar to that of the first pin member 221. For the description here, reference can be made to the above description of the first pin member 221, and details will not be elaborated herein.

[0053] In an embodiment of the present utility model, a first connection hole 2215 is formed along the length direction of the first support rod 2212. The first pin 2213 is movably disposed in the first connection hole 2215, and the first spring 2214 is sleeved outside the first pin 2213.

[0054] Specifically, by forming the first connection hole 2215 in the first support rod 2212, the movement of the first pin 2213 can be guided to ensure that the first pin 2213 moves in a predetermined direction and position. The first spring 2214 is also located in the first connection hole 2215. By sleeving the first spring 2214 outside the first pin 2213, the movement of the first spring 2214 can be guided. When the first pin 2213 is inserted and matched with the welding hole 220, the error during the insertion process can be reduced, and the accuracy of the insertion and matching of the first pin member 221 can be improved.

[0055] In addition, a second connection hole 2225 can also be formed in the second support rod 2222 to guide the movement of the second pin 2223 to ensure that the second pin 2223 moves in a predetermined direction and position. The second spring 2224 is also located in the second connection hole 2225. By sleeving the second spring 2224 outside the second pin 2223, the movement of the second spring 2224 can be guided. When the second pin 2223 is inserted and matched with the welding hole 220, the error during the insertion process can be reduced, and the accuracy of the insertion of the second pin 2223 can be improved.

[0056] In an embodiment of the present utility model, the first connection hole 2215 includes a first hole section (not marked in the figure) and a second hole section (not marked in the figure). The diameter of the first hole section is larger than that of the second hole section. The first pin 2213 has a first connection portion (not marked in the figure) and a second connection portion (not marked in the figure). The diameter of the first connection portion is larger than that of the second connection portion. The first connection portion extends into the first hole section, the first spring 2214 is disposed in the first hole section and sleeved outside the first connection portion, and the second connection portion extends into the second hole section and is at least partially exposed outside the second hole section.

[0057] It should be noted that the first connection hole 2215 is set as the first hole section and the second hole section, which are respectively matched with the first connection portion and the second connection portion. By setting different diameters, the first connection portion abuts against the end surface in the first hole section, so that the extension of the second connection portion along the second hole section can be limited to prevent the first pin 2213 from disengaging from the first connection hole 2215. The extended portion of the second connection portion is used to cooperate with the welding hole 220. One end of the first spring 2214 can be connected to the outer wall of the first connection portion, and the first spring 2214 moves in the first hole section. As Figure 3And Figure 4 In this way, the first pin 2213 is movably arranged in the first connection hole 2215, preventing the first pin 2213 from coming out. Moreover, it is not necessary to set up many components for cooperation, with a simple structure and strong practicability.

[0058] In addition, the second connection hole 2225 also includes a third hole section and a fourth hole section, the diameter of the third hole section being larger than that of the fourth hole section; the second pin 2223 has a third connection part and a fourth connection part, the diameter of the third connection part being larger than that of the fourth connection part; the third connection part extends into the third hole section, the second spring 2224 is arranged in the third hole section and sleeved outside the third connection part, the fourth connection part extends into the fourth hole section and at least partially exposes outside the fourth hole section. The effect is the same as above and will not be elaborated here.

[0059] In an embodiment of the present utility model, the first support rod 2212 is arranged in a straight line, the second support rod 2222 is arranged in a bent shape, and the first pin 2213 and the second pin 2223 are arranged in parallel.

[0060] Specifically, as shown in Figure 3 and Figure 4 , the first pin 2213 and the second pin 2223 are parallel. The second support rod 2222 is arranged in a bent shape, and the driving assembly drives the second pin 2223 to move towards or away from the first pin 2213 through the bent second support rod 2222, which can provide better stability for the second pin 2223, and the bent second support rod 2222 can provide better support.

[0061] In an embodiment of the present utility model, a positioning part 2216 protrudes outward from the outer wall of the first support rod 2212, and a fitting space (not marked in the figure) is formed below the positioning part 2216. The second support rod 2222 is bent towards the first support rod 2212, and the bent end portion of the second support rod 2222 partially extends into the fitting space.

[0062] Specifically, as shown in Figure 4 , by arranging the positioning part 2216 on the outer wall of the first support rod 2212, the positioning part 2216 can be used as a guiding component for the second support rod 2222 to move along the positioning part 2216, realizing movement along a predetermined path, facilitating the cooperation between the first pin 2213 and the second pin 2223, and inserting into the two welding holes 220 of the circuit board 210.

[0063] The above are only the preferred embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A pin mechanism for positioning a circuit board, where at least two soldering holes are provided on the circuit board, characterized in that, Comprising: A driving component; And A pin component, the pin component includes a first pin piece and a second pin piece, the first pin piece and the second pin piece are connected to the driving end of the driving component, the driving component is used to drive the first pin piece and the second pin piece to move, and the first pin piece and the second pin piece are respectively inserted into two of the soldering holes of the circuit board and connected to the soldering holes.

2. The pin mechanism according to claim 1, characterized in that The driving component includes a Y-axis driving member and a rotation driving member, the rotation driving member is connected to the driving end of the Y-axis driving member, and the first pin piece and the second pin piece are connected to the driving end of the rotation driving member.

3. The pin mechanism according to claim 2, wherein The driving component further includes an X-axis driving member, the X-axis driving member is connected to the driving end of the rotation driving member, the first pin piece is connected to the fixed end of the X-axis driving member, the second pin piece is connected to the driving end of the X-axis driving member, and the X-axis driving member is used to drive the second pin piece to move relatively closer to or farther from the first pin piece.

4. The pin mechanism according to claim 1, characterized in that, The first pin piece is provided with a first insertion portion for plugging and mating with the soldering hole, the first insertion portion is conical, and the diameter of the first insertion portion gradually decreases in the direction towards the circuit board; And / or, the second pin piece is provided with a second insertion portion for plugging and mating with the soldering hole, the second insertion portion is conical, and the diameter of the second insertion portion gradually decreases in the direction towards the circuit board.

5. The pin mechanism according to claim 1, characterized in that, The first pin piece is made of an elastic material; And / or, the second pin piece is made of an elastic material.

6. The pin mechanism according to any one of claims 1 to 5, characterized in that The first pin piece includes a first support rod, a first pin and a first spring, the first support rod is connected to the driving end of the driving component, the first pin is movably arranged on the first support rod, one end of the first spring abuts against the first support rod, and the other end of the first spring abuts against the first pin; And / or, the second pin piece includes a second support rod, a second pin and a second spring, the second support rod is connected to the driving end of the driving component, the second pin is movably arranged on the second support rod, one end of the second spring abuts against the second support rod, and the other end of the second spring abuts against the second pin.

7. The pin mechanism according to claim 6, characterized in that, The first support rod is provided with a first connection hole along its length direction, the first pin is movably arranged in the first connection hole, and the first spring is sleeved outside the first pin.

8. The pin mechanism according to claim 7, characterized in that, The first connection hole includes a first hole section and a second hole section, and the diameter of the first hole section is larger than that of the second hole section; The first pin has a first connection portion and a second connection portion, and the diameter of the first connection portion is larger than that of the second connection portion; The first connection portion extends into the first hole section, the first spring is arranged in the first hole section and sleeved outside the first connection portion, the second connection portion extends into the second hole section and is at least partially exposed outside the second hole section.

9. The pin mechanism according to claim 6, wherein The first support rod is arranged in a straight line, the second support rod is arranged in a bent shape, and the first pin and the second pin are arranged in parallel.

10. The pin mechanism according to claim 9, wherein The outer wall of the first support rod is convexly provided with a positioning portion and a fitting space is formed below the positioning portion. The second support rod is bent towards the first support rod, and the bent end portion of the second support rod partially extends into the fitting space.

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