Fastener

Abstract

The invention provides a fastener which is used for being inserted into a first through hole of a first piece so as to be connected with the first piece. The fastener includes a sleeve member, an insert, and a sealing ring. The sleeve piece is configured to be capable of being inserted into the first through hole and connected with the first piece, and a sleeve through hole is formed in the sleeve piece. The insertion piece can be inserted into the sleeve through hole so as to be connected with the sleeve piece. The sealing ring is disposed around the insert and is configured such that when the fastener is mounted in place on the first piece, the sealing ring abuts against the first piece, thereby forming a seal. According to the fastener, the first part and the second part can be connected, and sealing is generated between the fastener and the first part, so that liquid is prevented from entering the space between the first part and the second part.

Description

Technical Field

[0001] The present invention relates to the field of fasteners. Background Art

[0002] The existing fastener is used to be inserted into the first piece and connected with the first piece. The fastener is provided with a sealing portion to form a seal with the first piece. However, the existing fastener cannot be inserted and removed multiple times, and the force required for insertion is relatively large. Summary of the invention

[0003] Exemplary embodiments of the present application may address at least some of the above-mentioned problems.

[0004] The present application provides a fastener, which is used to be inserted into a first through hole of a first member, so as to be connected with the first member. The fastener comprises a sleeve member, an insert and a sealing ring. The sleeve member is configured to be inserted into the first through hole and connected with the first member, and a sleeve through hole is provided on the sleeve member. The insert can be inserted into the sleeve through hole, so as to be connected with the sleeve member. The sealing ring is arranged around the insert and is configured such that when the fastener is installed in place on the first member, the sealing ring abuts against the first member, so as to form a seal.

[0005] According to the fastener, the fastener is configured such that when the fastener is installed in place on the first member, the fastener seals the first through hole through the sealing ring but not through the sleeve member.

[0006] According to the fastener, the insert comprises a pin and a support portion, the pin can be inserted into the sleeve through hole to be connected with the sleeve, and the support portion is arranged around the pin and connected with the pin, wherein the sealing ring is arranged around the support portion.

[0007] According to the fastener, the sealing ring wraps at least a portion of the support portion and extends outward from the support portion. The fastener has a central axis, and in an axial cross section of the fastener, the extending direction of the sealing ring is inclined to the central axis.

[0008] According to the fastener, the portion of the support portion wrapped by the sealing ring is a support plate. In the axial cross section of the fastener, the extension direction of the support plate is inclined to the central axis. The angle formed by the extension direction of the support plate and the central axis is greater than the angle formed by the extension direction of the sealing ring and the central axis.

[0009] According to the fastener, the sealing ring is connected to the supporting portion by an injection molding process.

[0010] According to the fastener, the sleeve member includes a sleeve body, a first abutment portion and a second abutment portion, and the sleeve through hole is arranged on the sleeve body and penetrates the sleeve body. The first abutment portion and the second abutment portion are arranged on the sleeve body and are arranged at a distance along the central axis direction, and are used to receive the first member to connect with the first member.

[0011] According to the fastener, the sealing ring is configured such that when the sleeve member is connected to the insert member, an edge of the sealing ring exceeds an edge of the first abutment portion in a direction along the central axis and from the first abutment portion toward the second abutment portion.

[0012] According to the fastener, the sleeve member further comprises at least two legs, which are connected to the sleeve body and can move relative to the sleeve body toward or away from the central axis to clamp and release the insert.

[0013] According to the fastener, the insert further comprises a head, which is arranged at a distance from the support portion in the direction of the central axis and is used to receive a second piece so that the fastener can be connected to the second piece.

[0014] The fastener of the present application can connect a first piece and a second piece and create a seal with the first piece, thereby preventing liquid (such as rain water) from entering between the first piece and the second piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The features and advantages of the present application may be better understood by reading the following detailed description with reference to the accompanying drawings, in which like reference numerals refer to like components throughout, wherein:

[0016] Figure 1 is a three-dimensional diagram of the fastener of the present application;

[0017] Figure 2A-2B yes Figure 1 a perspective view of the insert shown;

[0018] Figure 2C yes Figure 1 a cross-sectional view of the insert shown;

[0019] Figure 3A-3B yes Figure 1 A perspective view of the sleeve member shown;

[0020] Figure 3C yes Figure 3A-3B A cutaway perspective view of the sleeve member shown;

[0021] Figure 4A yes Figure 1a cross-sectional view of the fastener, the first member, and the second member shown, wherein the insert member and the sleeve member of the fastener are connected;

[0022] Figure 4B yes Figure 1 A cross-sectional view of the fastener, the first piece and the second piece shown in place;

[0023] Figure 5 yes Figure 1 A cross-sectional view of the fastener is shown after the insert member has been removed from the sleeve member. DETAILED DESCRIPTION

[0024] Various specific embodiments of the present application will be described below with reference to the accompanying drawings which constitute a part of this specification. It should be understood that in the following drawings, the same parts use the same figure numbers.

[0025] Various specific embodiments of the present application will be described below with reference to the accompanying drawings that form a part of this specification. It should be understood that although terms indicating directions, such as "upper", "lower", "left", "right", "inner", "outer", etc., are used in this application to describe various example structural parts and elements of the present application, these terms are used here only for the purpose of convenience of description, and these terms are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present application can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations.

[0026] The fastener of the present application is used to connect the first piece 400 and the second piece 420 (see Figure 4A ).

[0027] Figure 1 is a three-dimensional diagram of the fastener of the present application. Figure 1 As shown, the fastener of the present application includes an insert 102, a sleeve 104 and a sealing ring 106. The sleeve 104 is provided with a sleeve through hole 112 extending in the up-down direction. The insert 102 can be inserted into the sleeve through hole 112 and is detachably connected to the sleeve 104. The sealing ring 106 is arranged around the insert 102 and is configured such that when the fastener is installed in place on the first piece 400, the sealing ring 106 abuts against the first piece 400 to form a seal. The fastener has a central axis X and is symmetrical about the central axis X.

[0028] Figure 2A-2B yes Figure 1 A perspective view of the insert 102 is shown, Figure 2C yes Figure 1 The insert 102 is shown in a cross-sectional view in the axial cross section of the fastener. Figure 2A-2CAs shown, the insert 102 of the present application includes a head 202, a neck 203, a support portion 204 and a pin 206. The head 202, the neck 203, the support portion 204 and the pin 206 are coaxially arranged with the central axis X. The head 202 is roughly disc-shaped. The support portion 204 is arranged below the head 202 and is arranged at a distance from the head 202 along the central axis X. The neck 203 is roughly cylindrical, arranged between the head 202 and the support portion 204, and connected to the head 202 and the support portion 204. As a result, a head space is roughly formed between the head 202, the neck 203 and the support portion 204 for accommodating the second piece 420 (see Figure 4A ) to connect with the second piece 420.

[0029] like Figure 2A-2C As shown, the pin 206 is substantially cylindrical. The pin 206 is disposed below the support portion 204 and connected to the support portion 204. Four protrusions 208 are provided at the lower portion of the pin 206. The four protrusions 208 are evenly disposed along the circumferential direction of the pin 206, and each protrusion 208 is substantially extended along the central axis X. When the insert 102 is connected to the sleeve member 104, the protrusions 208 can abut against the sleeve member 104, thereby maintaining stability in the radial direction. The tail 212 is disposed at the bottom of the pin 206. The tail 212 is substantially conical. The tip of the cone is disposed in a direction away from the head 202. The tail 212 has a first inclined surface 221 and a second inclined surface 222. The first inclined surface 221 and the second inclined surface 222 are disposed at an angle to the central axis X. The connection between the lower portion of the first inclined surface 221 and the upper portion of the second inclined surface 222 is the largest diameter of the tail 212. During the insertion of the insert 102 into the sleeve 104, the second inclined surface 222 can guide the leg 306 of the sleeve 104 (see Figure 3A ) are relatively far away from each other. In the process of the insert 102 moving away from the sleeve 104, the first inclined surface 221 can guide the legs 306 of the sleeve 104 to move away from each other. A receiving recess 209 is formed between the tail 212 and the protrusion 208 for receiving a part of the insert 102.

[0030] like Figure 2C As shown, the sealing ring 106 is disposed on the support portion 204 and is disposed around the support portion 204. The sealing ring 106 is used to abut against the first member 400 (see Figure 4A) on the upper surface of the fastener, thereby forming a seal. The material of the sealing ring 106 is softer than the material of the support portion 204. In the present application, the sealing ring 106 can be made of rubber. The head 202, the neck 203, the support portion 204 and the pin 206 are formed integrally. The insert 102 is made of plastic. The sealing ring 106 can be connected to the insert 102 by an injection molding process. Specifically, on the axial cross-section of the fastener, the support portion 204 is roughly wing-shaped. Specifically, the support portion 204 extends outward from the neck 203 for a distance and then extends outward to the tail 212. The sealing ring 106 wraps at least a portion of the support portion 204 and is formed to extend outward from the support portion 204. In the present application, the sealing ring 106 wraps the end of the support portion 204. The extending direction of the sealing ring 106 (eg, the axis N) is inclined to the central axis X, so that when the sealing ring 106 contacts and abuts against the first piece 400 , the force applied by the sealing ring 106 on the first piece 400 is inclined outward, thereby better pressing on the first piece 400 .

[0031] like Figure 2C As shown, the portion of the support portion 204 wrapped by the sealing ring 106 is the support plate 205, thereby strengthening the strength of the root of the sealing ring 106 (i.e., the connection with the support plate 205). On the axial cross section of the fastener, the extension direction of the support plate 205 (e.g., axis M) is inclined to the central axis X, and the extension direction of the support plate 205 and the extension direction of the sealing ring 106 are set at an angle. In the present application, the angle formed by the extension direction of the support plate 205 (e.g., axis M) and the central axis X is greater than the angle formed by the extension direction of the sealing ring 106 (e.g., axis N) and the central axis X, so that when the sealing ring 106 contacts and abuts against the first piece 400, the support plate 205 also has a certain degree of mobility along the central axis X, so that the sealing ring 106 can adapt to the first piece 400 of different thicknesses.

[0032] Figure 3A-3B yes Figure 1 The three-dimensional view of the sleeve member 104 from different directions is shown. Figure 3A-3BAs shown, the sleeve member 104 includes a sleeve body 302, four first abutment portions 304, four legs 306 and two second abutment portions 308. The sleeve body 302 is generally cylindrical and has a central axis X. The sleeve body 302 is provided with a sleeve through hole 112 extending along the central axis X. The sleeve through hole 112 runs through the sleeve body 302 for receiving the insert 102. More specifically, the sleeve through hole 112 is used to receive the pin 206. The four first abutment portions 304 are connected to the top of the sleeve body 302 and are evenly arranged along the circumferential direction of the sleeve body 302. Each of the four first abutment portions 304 is formed to extend outward from the top of the sleeve body 302 and toward the legs 306, so that the edge 307 (i.e., the lower edge) of the first abutment portion 304 is lower than the top edge 309 of the sleeve body 302. When the sleeve member 104 is connected to the first member 400, the edges 307 of the four first abutting portions 304 can abut against the first member 400 (see Figure 4A) on the upper surface of the sleeve body 302. Two windows 341 are provided on the sleeve body 302. The two windows 341 are arranged along the same radial direction of the sleeve body 302 and penetrate the sleeve body 302 along the radial direction of the sleeve body 302. Two second abutting portions 308 are correspondingly arranged in the two windows 341, and the bottoms of the two second abutting portions 308 are connected to the sleeve body 302. In other words, the tops of the two second abutting portions 308 are free ends, which can move relative to the sleeve body 302 along the radial direction of the sleeve body 302, so as to approach or move away from the central axis X. The second abutting portion 308 is arranged at a distance from the first abutting portion 304 along the central axis X, so as to cooperate with the four first abutting portions 304 to receive the first piece 400. The four legs 306 are connected to the bottom of the sleeve body 302 and are evenly arranged along the circumferential direction of the sleeve body 302. Each of the four legs 306 is formed to extend from the bottom of the sleeve body 302 along the central axis X away from the sleeve body 302, and the bottom ends (i.e., free ends) of the four legs 306 are slightly retracted toward the central axis X. Since the bottom ends of the four legs 306 are free ends, the bottom ends of the four legs 306 can move relative to the sleeve body 302 and move along the radial direction of the sleeve body 302, thereby approaching or moving away from the central axis X. The bottom ends of the four legs 306 can cooperate with the accommodating recesses 209 on the insert 102, thereby clamping and releasing the insert 102. Specifically, during the process of inserting the insert 102 into the sleeve through hole 112, the second inclined surface 222 of the tail 212 on the insert 102 abuts against the legs 306, so that the legs 306 are away from each other. Subsequently, the tail portion 212 passes over the leg portion 306, and the bottom end (i.e., the free end) of the leg portion 306 is received in the receiving recess 209 to clamp the insert 102. In the process of the insert 102 leaving the sleeve through hole 112, the first inclined surface 221 of the tail portion 212 on the insert 102 abuts against the leg portion 306, thereby moving the leg portions 306 away from each other. Subsequently, the tail portion 212 can pass over the leg portion 306, thereby causing the bottom end (i.e., the free end) of the leg portion 306 to leave the receiving recess 209 to release the insert 102.

[0033] It should be noted that although the sleeve member 104 in the present application includes a specific number of first abutment portions 304, legs 306 and second abutment portions 308, at least two first abutment portions 304, at least two legs 306 and at least two second abutment portions 308 are all within the protection scope of the present application.

[0034] Figure 3C yes Figure 3A-3B A cutaway perspective view of the sleeve member 104 is shown. Figure 3C The first abutment portion 304 is not shown in the figure, so as to show the specific structure of the second abutment portion 308. Figure 3C As shown, and refer to Figure 3A-3B, each second abutting portion 308 includes two abutting branches. Specifically, each second abutting portion 308 includes a first abutting branch 321 and a second abutting branch 322. The first abutting branch 321 and the second abutting branch 322 have the same structure and are arranged at a distance in the circumferential direction, so that the abutting structure is more stable. Each abutting branch includes a first abutting surface 331 and a second abutting surface 332. The first abutting surface 331 is arranged obliquely to the central axis X. The second abutting surface 332 is located below the first abutting surface 331, is connected to the first abutting surface 331, and is arranged approximately perpendicular to the central axis X. When the sleeve member 104 is connected to the first member 400, any part on the first abutting surface 331 can abut against the lower surface of the first member 400, so that the sleeve member 104 can adapt to the first member 400 of different thicknesses.

[0035] It should be noted that, although each second abutting portion 308 includes two abutting branches in the present application, in other embodiments, any number of abutting branches are within the protection scope of the present application. In addition, although the first abutting surface 331 shown in the present application is a plane, in other embodiments, the first abutting surface 331 may also be a wavy surface or other shapes.

[0036] Figure 4A yes Figure 1 The cross-sectional view of the fastener, the first member 400 and the second member 420 is shown to illustrate the specific structure of the fastener, the first member 400 and the second member 420 and the state in which the insert member 102 and the sleeve member 104 in the fastener are connected. Figure 4A As shown, when the bottom end (i.e., the free end) of the leg portion 306 of the sleeve member 104 is received in the receiving recess 209 of the insert member 102, the insert member 102 and the sleeve member 104 are connected (i.e., the insert member 102 and the sleeve member 104 are in a pre-installed state). The sealing ring 106 is configured such that when the insert member 102 and the sleeve member 104 are connected, in the direction along the central axis X and from the first abutment portion 304 toward the second abutment portion 308, the edge 431 of the sealing ring 106 exceeds the edge 307 of the first abutment portion 304.

[0037] like Figure 4A As shown, the first piece 400 and the second piece 420 are generally flat plates. The first piece 400 is provided with a first through hole 401. The first through hole 401 is a circular hole and passes through the first piece 400 in the up-down direction (i.e., along the central axis X). The first through hole 401 is used to receive a fastener. The second piece 420 is provided with a snap-in hole 422. The snap-in hole 422 is formed by extending inward from the edge of the second piece 420 to receive the insert 102.

[0038] Figure 4B yes Figure 1A cross-sectional view of the fastener, first piece 400 and second piece 420 when installed in place. Figure 4B As shown, when the fastener, the first piece 400 and the second piece 420 are installed in place, the sleeve piece 104 is connected to the first piece 400, and the insert piece 102 is connected to the second piece 420. Specifically, the maximum radius of the edge 307 of the first abutting portion 304 is greater than the radius of the first through hole 401, and the maximum radius of the second abutting surface 332 of the second abutting portion 308 is greater than the radius of the first through hole 401. As a result, the first abutting portion 304 of the sleeve piece 104 abuts against the upper surface of the first piece 400, and the second abutting portion 308 abuts against the lower surface of the first piece 400, so that the fastener is connected to the first piece 400. In the present application, the first abutting surface 331 of the second abutting portion 308 abuts against the lower surface of the first piece 400.

[0039] like Figure 4B As shown, the neck 203 of the insert 102 is located in the snap-fit ​​hole 422, so that the insert 102 is connected to the second piece 420. Specifically, the size of the head 202 and the size of the support portion 204 are both larger than the size of the snap-fit ​​hole 422, so the second piece 420 can be retained in the head space between the head 202 and the support portion 204.

[0040] like Figure 4B As shown, when the fastener, the first piece 400 and the second piece 420 are installed in place, the sealing ring 106 abuts against the upper surface of the first piece 400, thereby forming a seal. Specifically, the diameter of the sealing ring 106 is larger than the diameter of the first through hole 401 and also larger than the maximum diameter of the first abutting portion 304, so that the sealing ring 106 surrounds and crosses the first abutting portion 304 to contact the upper surface of the first piece 400. Therefore, when the fastener of the present application is installed in place on the first piece 400, the fastener seals the first through hole 401 through the sealing ring 106 instead of the sleeve piece 104.

[0041] As an embodiment, the fastener is used in a vehicle. The first piece 400 is a sheet metal of the vehicle. The second piece 420 is an interior panel of the vehicle. The fastener of the prior art can mount the interior panel to the sheet metal. However, the inventor of the present application found that in the prior art, liquid (such as water) exists in the space between the first piece 400 and the second piece 420. The inventor of the present application found that this is because the sheet metal is washed by rain during the driving of the vehicle. Figure 4B , rainwater will wash the lower surface of the first piece 400 along the direction of the arrow. Rainwater may enter between the first piece 400 and the second piece 420 through the first through hole 401 on the first piece 400.

[0042] The fastener of the present application can connect the first piece 400 and the second piece 420, and form a seal with the first piece 400, thereby preventing liquid (such as rainwater) from entering between the first piece 400 and the second piece 420. Specifically, the sealing ring 106 of the present application abuts against the upper surface of the first piece 400 to form a seal, so the sealing ring 106 can keep rainwater in the range enclosed by the abutting portion 304, thereby preventing rainwater from entering between the first piece 400 and the second piece 420 to avoid contacting the second piece 420 (such as an interior trim panel).

[0043] In addition, the fastener of the present application has good detachability. Specifically, when repairing a vehicle, the sheet metal and the interior panel need to be disassembled and reconnected using the above fastener. Figure 5 To describe the specific process:

[0044] Figure 5 4 is a cross-sectional view of a fastener connecting the first piece 400 and the second piece 420 and then disassembling them (i.e., the first piece 400 and the second piece 420 are not connected). Figure 5 As shown, when the fastener is connected to the first piece 400 and the second piece 420 and then separated again, the insert 102 of the fastener remains connected to the second piece 420, the sleeve 104 of the fastener remains connected to the first piece 400, and the insert 102 is separated from the sleeve 104. The insert 102 and the sleeve 104 of the present application can be connected and separated multiple times, so as to connect the first piece 400 and the second piece 420 again.

[0045] In the prior art, after multiple disassembly and assembly, the insert connected to the second piece 420 sometimes cannot be inserted into the sleeve piece connected to the first piece 400. The applicant of the present application found that this is because after multiple disassembly and assembly, the first piece and / or the second piece are deformed, resulting in a reduction in the distance between the first piece and the second piece. Specifically, the inventor of the present application found that in the prior art, the sleeve piece is provided with a first sealing ring extending upward and used to abut the insert and a second sealing ring extending downward and used to abut the first piece. In the process of the insert and the sleeve moving toward each other, the operator's pressing needs to overcome the two superimposed resistances of the first sealing ring and the second sealing ring. However, the sealing ring 106 of the present application is arranged on the insert 102 and the sleeve 104 is not provided with a sealing ring, so when the insert 102 and the sleeve 104 move toward each other, the operator's pressing overcomes the resistance brought by one sealing ring (i.e., the sealing ring 106). Therefore, a small pressing force can connect the insert 102 and the sleeve 104.

[0046] In addition, the applicant of the present application has also found that in the prior art, since the sleeve member is provided with a first sealing ring extending upward and used to abut against the insert and a second sealing ring extending downward and used to abut against the first member, the lengths of the first sealing ring and the second sealing ring are relatively short, and thus the amount of deformation is also relatively small. When the distance between the first member and the second member is reduced, since the amount of deformation of the first sealing ring and the second sealing ring is relatively small, after the insert is extended into the sleeve member, the leg of the sleeve member cannot be accommodated in the accommodation recess of the insert member, so that the insert member cannot be connected to the sleeve member.

[0047] The sealing ring 106 of the present application is arranged on the insert 102, and the sealing ring 106 surrounds the first abutment portion 304 of the sleeve 104, so the sealing ring 106 is long and has a large deformability. Even if the distance between the first and second members is reduced, the sealing ring 106 has a large deformability, so after the sealing ring 106 is squeezed and deformed, the leg 306 of the sleeve 104 can still be accommodated in the accommodating recess 209 of the insert 102, so that the insert 102 and the sleeve 104 are connected.

[0048] The fastener of the present application has a simple structure, requires a small pressing force when connecting the first piece and the second piece, and can adapt to the first piece and the second piece with a reduced spacing.

[0049] Although the present disclosure has been described in conjunction with the examples of the embodiments summarized above, various alternatives, modifications, changes, improvements and / or substantially equivalent solutions, whether known or currently or foreseeable in the near future, may be apparent to those of ordinary skill in the art. In addition, the technical effects and / or technical problems described in this specification are exemplary rather than restrictive; so the disclosure in this specification may be used to solve other technical problems and have other technical effects and / or may solve other technical problems. Therefore, the examples of the embodiments of the present disclosure as stated above are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to include all known or earlier developed alternatives, modifications, changes, improvements and / or substantially equivalent solutions.

Claims

1. A fastener, for inserting into a first through hole (401) of a first member (400) to connect with the first member (400), characterized in that: The fastener comprises: a sleeve member (104), the sleeve member (104) being configured to be inserted into the first through hole (401) and connected to the first member (400), and the sleeve member (104) being provided with a sleeve through hole (112); an insert (102), the insert (102) being insertable into the sleeve through hole (112) so as to be connected with the sleeve member (104); and A sealing ring (106) is disposed around the insert (102) and is configured to abut against the first piece (400) when the fastener is installed in place on the first piece (400), thereby forming a seal.

2. The fastener according to claim 1, characterized in that: The fastener is configured such that, when the fastener is installed in place on the first member (400), the fastener seals the first through hole (401) through the sealing ring (106) but not through the sleeve member (104).

3. The fastener according to claim 1, characterized in that: The insert (102) comprises a pin (206) and a support portion (204), wherein the pin (206) can be inserted into the sleeve through hole (112) to be connected to the sleeve member (104), and the support portion (204) is arranged around the pin (206) and connected to the pin (206); Wherein, the sealing ring (106) is arranged around the supporting portion (204).

4. The fastener according to claim 3, characterized in that: The sealing ring (106) wraps at least a portion of the support portion (204) and extends outward from the support portion (204); The fastener has a central axis, and in an axial cross section of the fastener, an extending direction of the sealing ring (106) is inclined to the central axis.

5. The fastener according to claim 4, characterized in that: The portion of the support portion (204) wrapped by the sealing ring (106) is a support plate (205); On the axial cross section of the fastener, the extension direction of the support plate (205) is inclined to the central axis; Wherein, the angle formed by the extension direction of the support plate (205) and the central axis is greater than the angle formed by the extension direction of the sealing ring (106) and the central axis.

6. The fastener according to claim 3, characterized in that: The sealing ring (106) is connected to the supporting portion (204) by means of an injection molding process.

7. The fastener according to claim 4, characterized in that: The sleeve member (104) comprises a sleeve body (302), a first abutting portion (304) and a second abutting portion (308); the sleeve through hole (112) is arranged on the sleeve body (302) and penetrates the sleeve body (302); The first abutting portion (304) and the second abutting portion (308) are arranged on the sleeve body (302) and are arranged at a distance along the central axis direction, and are used to receive the first piece (400) so as to be connected to the first piece (400).

8. The fastener according to claim 7, characterized in that: The sealing ring (106) is configured such that when the sleeve member (104) is connected to the insert member (102), an edge (431) of the sealing ring (106) exceeds an edge (307) of the first abutment portion (304) in a direction along the center axis and from the first abutment portion (304) toward the second abutment portion (308).

9. The fastener according to claim 7, characterized in that: The sleeve member (104) further comprises at least two legs (306) connected to the sleeve body (302) and capable of moving toward or away from the central axis relative to the sleeve body (302) to clamp and release the insert (102).

10. The fastener according to claim 4, characterized in that: The insert (102) also includes a head (202); In the direction of the central axis, the head (202) is arranged at a distance from the support portion (204) for receiving the second piece (420) so that the fastener can be connected to the second piece (420).

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