Limiting module and soldering machine

Abstract

The invention provides a limiting module and a soldering machine. The limiting module comprises a plurality of arc-shaped plates, a fixing part and a reset piece. The multiple arc-shaped plates are arranged in the circumferential direction, and a gap exists between every two adjacent arc-shaped plates. The radiuses of circles where the arc-shaped edges of the inner surfaces of the arc-shaped plates are located are the same. The arc-shaped plate comprises a first end part and a second end part opposite to the first end part; the fixing part is arranged on the outer sides of the multiple arc-shaped plates in a sleeving mode, the arc-shaped plates are connected with the fixing part, and the arc-shaped plates can rotate relative to the fixing part, so that when acting force is applied to the multiple first end parts, every two adjacent first end parts abut against each other, and the distance between every two adjacent second end parts is increased. The reset piece is configured to enable every two adjacent first end parts to be separated after acting force applied to the multiple first end parts disappears, the distance between every two adjacent second end parts is decreased, and the arc-shaped plate is reset.

Description

Technical Field

[0001] The present application relates to the field of semiconductor technology, and in particular to a limit module and a soldering machine. Background Art

[0002] In the process of preparing semiconductor structures, soldering machines are frequently used equipment. Soldering machines have high working efficiency and can be used in the preparation process of semiconductor packaging structures in various packaging forms.

[0003] The soldering machine includes a rotating shaft, a tin coil and a limit block. After the tin coil is sleeved on the rotating shaft, the limit block is fixed on the rotating shaft. The limit block is located on the outside of the tin coil and can limit the tin coil to prevent the tin coil from detaching from the rotating shaft. When replacing the tin coil of the soldering machine, the limit block needs to be disassembled and installed.

[0004] At present, screws are generally used to fix the limit block on the rotating shaft, and the installation and removal of the limit block are relatively complicated. Summary of the invention

[0005] The embodiments of the present application provide a limit module and a soldering machine.

[0006] According to a first aspect of an embodiment of the present application, a limit module is provided, the limit module comprising:

[0007] A plurality of arc-shaped plates, wherein the plurality of arc-shaped plates are arranged in a circumferential direction, and there are gaps between adjacent arc-shaped plates; the radius of the circle where the arc-shaped edges of the inner surfaces of the arc-shaped plates lie is the same; the arc-shaped plates include a first end and a second end opposite to the first end;

[0008] A fixing part, which is sleeved on the outer sides of the plurality of arc-shaped plates, each of the arc-shaped plates is connected to the fixing plate respectively, and the arc-shaped plate can rotate relative to the fixing part, so that when a force is applied to the plurality of the first end portions, two adjacent first end portions abut against each other, and the distance between two adjacent second end portions becomes larger;

[0009] The reset member is configured to separate two adjacent first ends after the force applied to the plurality of first ends disappears, so that the distance between two adjacent second ends becomes smaller, and the arc plate is reset.

[0010] In one embodiment, the distance between the fixing portion and the first end is a first distance, the distance between the fixing portion and the second end is a second distance, and the first distance is greater than the second distance.

[0011] In one embodiment, a ratio of the first distance to the second distance is less than or equal to 5:3.

[0012] In one embodiment, the reset member includes a plurality of elastic members, one of which is respectively provided between each of the arc plates and the fixed portion, and the elastic members respectively resist against the arc plates and the fixed portion; when a force is applied to the plurality of first end portions, the elastic member deforms, and after the force applied to the plurality of first end portions disappears, the elastic member recovers the deformation, thereby driving the arc plates to rotate relative to the fixed portion, thereby reducing the distance between two adjacent second end portions.

[0013] In one embodiment, the elastic member is a compression spring, and the compression spring includes two opposite ends in the length direction, one end of the compression spring abuts against the arc plate, and the other end of the compression spring abuts against the fixing portion.

[0014] In one embodiment, the elastic member is a torsion spring, which includes a main body and torsion parts located at opposite ends of the main body in the length direction of the main body, and the extension direction of the torsion part intersects with the length direction of the main body; one of the torsion parts is against the fixed part, and the other torsion part is against the arc plate.

[0015] In one embodiment, the elastic member is a spring sheet, which includes two opposite ends, one end of the spring sheet abuts against the arc plate, and the other end abuts against the fixing portion; a portion of the spring sheet between the two ends protrudes toward the second end.

[0016] In one embodiment, the sum of the central angles of the arc-shaped sides of the inner surfaces of the plurality of arc-shaped plates and the central angles corresponding to the gaps is equal to 360°.

[0017] In one embodiment, the central angles of the arc-shaped sides of the inner surfaces of the arc-shaped plates are equal, and the number of the arc-shaped plates ranges from 3 to 8; and / or,

[0018] The distance between adjacent arc-shaped plates ranges from 0.5 mm to 2 mm.

[0019] According to a second aspect of the embodiment of the present application, a soldering machine is provided, the soldering machine comprising a rotating shaft, a tin coil and the above-mentioned limit module; the tin coil is sleeved on the rotating shaft;

[0020] The limiting module is configured such that when a force is applied to the plurality of first ends, the distance between two adjacent second ends increases, the limiting module is sleeved on the rotating shaft from the second end, and after the force applied to the plurality of first ends disappears, each of the arc plates contacts the rotating shaft, and the limiting module limits the tin coil.

[0021] The limit module and soldering machine provided in the embodiment of the present application, by setting the radius of the circle where the arc-shaped edges of the inner surfaces of each arc plate are located to be the same, when the limit module is sleeved on the rotating shaft, the inner surface of each arc plate can contact the rotating shaft, so that the limit module can be fixed on the rotating shaft more firmly and prevent the limit module from being separated from the rotating shaft; when the limit module needs to be sleeved on the rotating shaft, a force is applied to the first end of each arc plate to make the two adjacent first ends abut each other, so that the distance between the two adjacent second ends becomes larger, so that the limit module can be sleeved on the rotating shaft from the second end, and then the force applied to the first end is stopped, and the reset member resets the arc plate, so that the inner surface of each arc plate can be respectively fitted with the rotating shaft, so that the limit module is fixed on the rotating shaft; when the limit module needs to be removed from the rotating shaft, a force is applied to the first end of each arc plate to make the distance between the two adjacent second ends become larger, so that the limit module can be removed from the rotating shaft. It can be seen that the installation of the limit module in the embodiment of the present application does not require the use of screws and other connecting parts, and both installation and disassembly are easy to operate, which can improve the installation and disassembly efficiency of the limit module, and can also avoid the situation where the screws slip when the limit module is installed with screws, resulting in the limit module being unable to be disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the three-dimensional structure of a limit module provided by an exemplary embodiment of the present application;

[0023] Figure 2 is a partial cross-sectional view of a limit module provided by an exemplary embodiment of the present application;

[0024] Figure 3 is a partial cross-sectional view of a limiting module provided by another exemplary embodiment of the present application;

[0025] Figure 4 is a partial cross-sectional view of a limiting module provided by yet another exemplary embodiment of the present application;

[0026] Figure 5 yes Figure 1 A schematic diagram of the three-dimensional structure of the first end of the arc-shaped plate of the limiting module shown in FIG. 1 after being subjected to force;

[0027] Figure 6 is a schematic diagram of a three-dimensional structure when a limit module provided by an exemplary embodiment of the present application is installed on a rotating shaft;

[0028] Figure 7 is a partial cross-sectional view of a limit module provided by an exemplary embodiment of the present application;

[0029] Figure 8 It is a schematic diagram of the partial structure of a soldering machine provided by an exemplary embodiment of the present application. Specific embodiments

[0030] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0031] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0032] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0033] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] The embodiment of the present application provides a limit module. The limit module can be used in a soldering machine. The soldering machine also includes a rotating shaft and a tin coil, the tin coil is sleeved on the rotating shaft, and the rotating shaft can drive the tin wire to rotate. The limit module can be set on the rotating shaft and located outside the tin coil to limit the tin coil and prevent the tin coil from detaching from the rotating shaft.

[0035] like Figures 1 to 4 As shown, the limiting module includes a plurality of arc-shaped plates 10 , a fixing portion 20 and a reset member 30 .

[0036] The multiple arc-shaped plates 10 are arranged at intervals along the circumferential direction, and there is a gap 104 between adjacent arc-shaped plates 10. The radius of the circle where the arc-shaped edges 11 of the inner surfaces of the arc-shaped plates 10 are located is the same. The arc-shaped plates 10 include a first end 101 and a second end 102 opposite to the first end 101, and the first end 101 of each arc-shaped plate 10 is located on the same side of the fixing portion 20. The fixing portion 20 is sleeved on the outer side of the multiple arc-shaped plates 10, and each arc-shaped plate 10 is connected to the fixing plate 20, and the arc-shaped plates 10 can rotate relative to the fixing portion 20, so that when a force is applied to the multiple first end portions 101, two adjacent first end portions 101 abut against each other, and the distance between two adjacent second end portions 102 becomes larger, as shown in FIG. Figure 5 The reset member 30 is configured to separate two adjacent first ends 101 after the force applied to the plurality of first ends 101 disappears, and the distance between two adjacent second ends 102 becomes smaller, and the arc plate 10 is reset, as shown. Figure 6 The resetting of the arc plate 10 refers to the arc plate 10 returning to the position when no force is applied to the first end portion thereof. The direction of the force applied to the first end portion 101 of the arc plate 10 is from the arc plate 10 to the direction of the axis of the circle where the multiple arc plates are located, and the operator can apply force to the first end portion 101 of each arc plate 10 by hand.

[0037] The limiting module provided in the embodiment of the present application sets the radius of the circle where the arc-shaped edges of the inner surfaces of each arc plate are located to be the same. Therefore, when the limiting module is sleeved on the rotating shaft, the inner surface of each arc plate can contact the rotating shaft, so that the limiting module can be fixed on the rotating shaft more firmly and prevent the limiting module from being separated from the rotating shaft; when the limiting module needs to be sleeved on the rotating shaft, a force is applied to the first end of each arc plate to make the two adjacent first ends abut each other, so that the distance between the two adjacent second ends becomes larger, so that the limiting module can be sleeved on the rotating shaft from the second end, and then the force applied to the first end is stopped, and the reset member resets the arc plate, so that the inner surface of each arc plate can be respectively fitted with the rotating shaft, so that the limiting module is fixed on the rotating shaft; when the limiting module needs to be removed from the rotating shaft, a force is applied to the first end of each arc plate to make the distance between the two adjacent second ends become larger, so that the limiting module can be removed from the rotating shaft. It can be seen that the installation of the limit module in the embodiment of the present application does not require the use of screws and other connecting parts, and both installation and disassembly are easy to operate, which can improve the installation and disassembly efficiency of the limit module, and can also avoid the situation where the screws slip when the limit module is installed with screws, resulting in the limit module being unable to be disassembled.

[0038] In one embodiment, the sum of the central angles of the arc-shaped edges of the inner surfaces of the plurality of arc-shaped plates 10 and the central angles corresponding to the gaps 104 is equal to 360°. In this way, the radius of the circle where the arc-shaped edges of the inner surfaces of the arc-shaped plates 10 are located can be set to be the same as the radius of the cross section of the shaft, so that after the limiting module is sleeved on the shaft, the inner surface of each arc-shaped plate 10 can fit the outer surface of the shaft, that is, the contact area between the limiting module and the shaft is larger, so that the limiting module can be fixed more firmly on the shaft.

[0039] In one embodiment, Figure 1 As shown, the central angles of the arc-shaped sides of the inner surfaces of the arc-shaped plates 10 are equal. With such a configuration, after the limit module is sleeved on the shaft, the contact areas of the arc-shaped plates 10 and the shaft are substantially the same, so that the forces exerted by the arc-shaped plates 10 on the shaft are substantially the same, which is conducive to making the limit module more firmly fixed on the shaft.

[0040] In one embodiment, the number of the arc plates 10 ranges from 3 to 8. This arrangement can avoid the situation where the number of the arc plates 10 is too small, and after the force is applied to the first end 101 of each arc plate 10, the total amount of increase in the distance between any two adjacent arc plates 10 in all the arc plates is too small, and the limit module is not easy to be sleeved on the shaft; it can also avoid the situation where the number of the arc plates 10 is too large, and the operator is inconvenient to operate when applying the force to the first end 101 of each arc plate 10. In some embodiments, the number of the arc plates can be 3, 4, 5, 6, 7 or 8. Figure 1 In the illustrated embodiment, there are four arc-shaped plates 10 in the position limiting module, and the central angle of the arc-shaped edge of the inner surface of each arc-shaped plate is close to 90°.

[0041] In one embodiment, the distance between adjacent arc plates 10 ranges from 0.5 mm to 2 mm. This arrangement ensures that after a force is applied to the first end 101 of each arc plate 10, the second end 102 of two adjacent arc plates 10 can be easily sleeved on the shaft; at the same time, it can avoid the distance between adjacent arc plates 10 being too large, so that the contact area between the arc plate 10 and the shaft is reduced. In some embodiments, the distance between adjacent arc plates 10 is 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, etc.

[0042] In one embodiment, Figure 1 As shown, the distance between the fixing portion 20 and the first end portion 101 is a first distance d1, and the distance between the fixing portion 20 and the second end portion 102 is a second distance d2, and the first distance d1 is greater than the second distance d2. In this way, when the operator applies force to the first end portion 101 of each curved plate 10 to increase the distance between the adjacent second ends 102, it can save effort and facilitate the operation of the operator.

[0043] Furthermore, the ratio of the first distance d1 to the second distance d2 is less than or equal to 5:3. This arrangement can avoid the ratio of the first distance d1 to the second distance d2 being too large, resulting in the distance between the second ends 102 of two adjacent arc-shaped plates 10 increasing too little, and the limit module is not easy to be sleeved on the shaft. The ratio of the first distance d1 to the second distance d2 is, for example, 5:3, 5:4, etc.

[0044] In one embodiment, the reset member includes a plurality of elastic members, one of which is provided between each of the arc plates and the fixed portion, and the elastic members are respectively against the arc plates and the fixed portion; when a force is applied to the plurality of first end portions, the elastic member is deformed, and after the force applied to the plurality of first end portions disappears, the elastic member restores the deformation, driving the arc plates to rotate relative to the fixed portion, so that the distance between two adjacent second end portions becomes smaller. When the elastic member restores the deformation, the position of each arc plate is restored to the position when no force is applied to the first end portion 101, so that each arc plate 10 is in contact with the rotating shaft. The elastic member can be connected to the arc plate 10 and the fixed portion 20, respectively.

[0045] In one embodiment, Figure 2 As shown, the elastic member is a compression spring 31, and the compression spring 31 includes two opposite ends in the length direction thereof, one end of the compression spring 31 abuts against the arc plate 10, and the other end abuts against the fixing portion 20. With such a configuration, when a force is applied to the first end portions 101 of the plurality of arc plates 10, the first end 101 of each arc plate 10 moves toward the direction of the central axis of the circle where the arc-shaped side of the arc plate 10 is located, so that the compression spring 31 is compressed; after the force applied to the first end portions 101 of the plurality of arc plates 10 disappears, the compression spring 31 stretches, driving the first end portions 101 of the arc plates 10 to move in a direction away from the central axis of the circle, so that the distance between the second end portions 102 of the adjacent arc plates 10 is reduced, so that the arc plates 10 contact the rotating shaft.

[0046] In another embodiment, Figure 3As shown, the elastic member is a torsion spring 32, which includes a main body 321 and torsion portions 322 located at opposite ends of the main body 321 in the length direction of the main body 321, and the extension direction of the torsion portion 322 intersects with the length direction of the main body 321; one of the torsion portions 322 abuts against the fixed portion 20, and the other torsion portion 322 abuts against the arc plate 10. With such a configuration, when a force is applied to the first ends 101 of the plurality of arc-shaped plates 10, the first ends 101 of the arc-shaped plates 10 all move toward the direction of the central axis of the circle where the arc-shaped side of the arc-shaped plate 10 is located, driving the twisting portion 322 to twist a certain angle relative to the main body 321; after the force applied to the first ends 101 of the plurality of arc-shaped plates 10 disappears, the elastic deformation energy stored in the twisting deformation of the twisting portion 322 is released, causing the twisting portion 322 to twist in the opposite direction relative to the main body 321, and then the twisting portion 322 drives the first ends 101 of the arc-shaped plates 10 to move in a direction away from the central axis of the circle, and the distance between the second ends 102 of the adjacent arc-shaped plates 10 is reduced, so that the arc-shaped plates 10 contact the rotating shaft. When a force is applied to the first ends 101 of the plurality of arc-shaped plates 10, at least one twisting portion 322 twists relative to the main body 321, for example, both twisting portions 322 can twist relative to the main body 321.

[0047] Furthermore, the extending direction of the torsion portion 322 and the length direction of the main body portion 321 may be perpendicular to each other.

[0048] Furthermore, the two torsion portions 322 may be located on the same side of the main body 321 , or on two opposite sides of the main body 321 . Figure 3 In the illustrated embodiment, the two torsion portions 322 are located on opposite sides of the main body portion 321 .

[0049] In yet another embodiment, Figure 4As shown, the elastic member is a spring sheet 33, and the spring sheet 33 includes two opposite ends, one end of the spring sheet 33 abuts against the arc plate 10, and the other end abuts against the fixing portion 20; the portion of the spring sheet 33 located between the two ends protrudes toward the second end 102. In this way, when a force is applied to the first end 101 of the plurality of arc plates 10, the first end 101 of each arc plate 10 moves toward the direction of the central axis of the circle where the arc-shaped edge of the arc plate 10 is located, and the arc plate 10 applies a force to the end of the spring sheet 33 in contact with it, so that the distance between the two ends of the spring sheet 33 is reduced; after the force applied to the first end 101 of the plurality of arc plates 10 disappears, the elastic deformation energy stored in the deformation of the spring sheet 33 is released, so that the distance between the two ends of the spring sheet 33 is increased, and then the spring sheet 33 drives the first end 101 of the arc plate 10 to move in the direction away from the central axis of the above circle, and the distance between the second ends 102 of the adjacent arc plates 10 is reduced, and the arc plate 10 is in contact with the rotating shaft. In some embodiments, the spring piece 33 may be arc-shaped.

[0050] In one embodiment, the fixing portion 20 may be in a circular ring shape.

[0051] In one embodiment, Figure 7 As shown, the fixing part 20 is connected to the curved plate 10 through the connecting part 50. The connecting part 50 includes a connecting rod 51 and an enlarged part 52. The curved plate 10 is provided with a connecting hole 12, one end of the connecting rod 51 is connected to the fixing part 20, and the other end passes through the connecting hole 12 and abuts against the enlarged part 52, and the enlarged part 52 is located on the side of the curved plate 10 away from the fixing part 20. The area of ​​the enlarged part 52 is larger than the area of ​​the connecting hole 12 to ensure that the connecting part 50 and the curved plate 10 will not be separated. The area of ​​the connecting hole 12 is larger than the area of ​​the cross section of the connecting rod 51, and the connecting rod 51 can rotate in the connecting hole 12, so that the curved plate 10 can rotate relative to the fixing part 20.

[0052] The present application also provides a soldering machine. Figure 8 As shown, the soldering machine includes a rotating shaft 40, a tin coil 70 and a limiting module as described in any of the above embodiments. The limiting module is configured so that when a force is applied to a plurality of the first ends 101, the distance between two adjacent second ends 102 becomes larger, and the limiting module is sleeved on the rotating shaft 40 from the second end 102, and each of the arc plates 10 contacts the rotating shaft 40 after the force applied to the plurality of the first ends 101 disappears. After the limiting module is sleeved on the rotating shaft, the limiting module is located on the side of the tin coil 70 to limit the tin coil 70. When the limiting module needs to be removed from the rotating shaft 40, the distance between two adjacent second ends 102 becomes larger when a force is applied to the plurality of the first ends 101, and the limiting module can be separated from the rotating shaft 40.

[0053] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0054] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the disclosure disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0055] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A limit module, characterized in that: The limit module comprises: A plurality of arc-shaped plates, wherein the plurality of arc-shaped plates are arranged in a circumferential direction, and there are gaps between adjacent arc-shaped plates; the radius of the circle where the arc-shaped edges of the inner surfaces of the arc-shaped plates lie is the same; the arc-shaped plates include a first end and a second end opposite to the first end; A fixing part, which is sleeved on the outer sides of the plurality of arc-shaped plates, each of the arc-shaped plates is connected to the fixing plate respectively, and the arc-shaped plate can rotate relative to the fixing part, so that when a force is applied to the plurality of the first end portions, two adjacent first end portions abut against each other, and the distance between two adjacent second end portions becomes larger; The reset member is configured to separate two adjacent first ends after the force applied to the plurality of first ends disappears, so that the distance between two adjacent second ends becomes smaller, and the arc plate is reset.

2. The limit module according to claim 1, characterized in that: The distance between the fixing portion and the first end portion is a first distance, the distance between the fixing portion and the second end portion is a second distance, and the first distance is greater than the second distance.

3. The limit module according to claim 2, characterized in that: A ratio of the first distance to the second distance is less than or equal to 5:

3.

4. The limiting module according to claim 1, characterized in that: The reset member includes a plurality of elastic members, one of which is respectively provided between each of the arc-shaped plates and the fixed portion, and the elastic members respectively resist against the arc-shaped plate and the fixed portion; when a force is applied to the plurality of first end portions, the elastic member deforms, and after the force applied to the plurality of first end portions disappears, the elastic member recovers the deformation, thereby driving the arc-shaped plate to rotate relative to the fixed portion, so that the distance between two adjacent second end portions becomes smaller.

5. The limiting module according to claim 4, characterized in that: The elastic member is a compression spring, and the compression spring includes two opposite ends in the length direction, one end of the compression spring abuts against the arc plate, and the other end abuts against the fixing portion.

6. The limiting module according to claim 4, characterized in that: The elastic member is a torsion spring, which includes a main body and torsion parts located at opposite ends of the main body in the length direction of the main body, and the extension direction of the torsion parts intersects with the length direction of the main body; one of the torsion parts abuts against the fixed part, and the other torsion part abuts against the arc plate.

7. The limiting module according to claim 4, characterized in that: The elastic member is a spring sheet, which includes two opposite ends, one end of which abuts against the arc-shaped plate, and the other end abuts against the fixing portion; a portion of the spring sheet located between the two ends protrudes toward the second end.

8. The limiting module according to claim 1, characterized in that: The sum of the central angles of the arc-shaped sides of the inner surfaces of the plurality of arc-shaped plates and the central angles corresponding to the gaps is equal to 360°.

9. The limiting module according to claim 1, characterized in that: The central angles of the arc-shaped sides of the inner surfaces of the arc-shaped plates are equal, and the number of the arc-shaped plates ranges from 3 to 8; and / or, The distance between adjacent arc-shaped plates ranges from 0.5 mm to 2 mm.

10. A soldering machine, characterized in that: The soldering machine comprises a rotating shaft, a solder coil and a limit module according to any one of claims 1 to 9; the solder coil is sleeved on the rotating shaft; The limiting module is configured such that when a force is applied to the plurality of first ends, the distance between two adjacent second ends increases, the limiting module is sleeved on the rotating shaft from the second end, and after the force applied to the plurality of first ends disappears, each of the arc plates contacts the rotating shaft, and the limiting module limits the tin coil.

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