CN216692828U

CN216692828U - Fast-assembling seat

Info

Publication number: CN216692828U
Application number: CN202220092416.0U
Authority: CN
Inventors: 不公告发明人
Original assignee: Guangdong Sirui Optical Co Ltd
Current assignee: Guangdong Sirui Optical Co Ltd
Priority date: 2021-09-18
Filing date: 2022-01-13
Publication date: 2022-06-07
Anticipated expiration: 2032-01-13

Abstract

The utility model discloses a quick-mounting seat, comprising: the connecting platform is connected with a connecting shaft and a polygonal boss, and the outer side wall of the connecting shaft is provided with a first inclined plane; the top of the base body is provided with a connecting hole for inserting the connecting shaft and a spline structure matched with the polygonal boss, and the side wall of the base body is provided with a through hole; the locking assembly comprises an outer locking sleeve which is sleeved on the periphery of the seat body in a sliding manner, a locking piece which is movably arranged in the through hole and is abutted against the inner side wall of the outer locking sleeve, and a first elastic piece which is positioned between the seat body and the outer locking sleeve; the outer locking sleeve moves towards the direction close to the connecting platform under the driving of the first elastic piece so as to push the locking piece to act on the first inclined plane on the connecting shaft and further drive the connecting shaft, the connecting platform and the base body to be close to each other so as to enable the polygonal boss and the spline structure to keep a tight fit state. The quick-mounting seat has the advantages of simple structure, capability of realizing quick assembly and disassembly, elimination of shaking and the like, and is favorable for improving the shooting quality of photographic equipment arranged on the connecting platform.

Description

Fast-assembling seat

Technical Field

The utility model relates to the technical field of photographic equipment, in particular to a quick-mounting seat.

Background

Currently, photographic equipment is usually fixed on a quick-mounting seat for shooting. The photographic equipment in the prior art is fixed by locking through the screw after being installed on the quick-mounting seat, so that the installation speed of the photographic equipment is slow, and the best shooting time is easily delayed sometimes.

The existing quick-mounting seat comprises a main body with a hollow hole, a lifting ring which is sleeved on the outer wall of the main body in a lifting way, an outer spring which enables the lifting ring to reset upwards, and a panel of which the inserting part can be vertically inserted into the upper half part of the hollow hole; the panel is provided with a screw connected with the photographic equipment.

However, an assembly gap inevitably exists between a panel and a main body of the existing fast-assembly seat, and shooting quality is easily affected by shaking after the photographic equipment is installed on the panel, so improvement is needed.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the defects that the connection tightness between the panel and the main body of the quick-assembly seat in the prior art is poor, and shaking is easy to occur to influence the shooting quality of photographic equipment installed on the panel, so that the quick-assembly seat is provided.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

a quick mount comprising:

the connecting platform is connected with a connecting shaft and a polygonal boss positioned on the periphery of the connecting shaft, an abdicating space is arranged on the periphery of the connecting shaft, and a first inclined plane is arranged on the inner wall surface of the abdicating space;

the top of the seat body is provided with a connecting hole for inserting the connecting shaft, the upper end of the seat body is provided with a spline structure matched with the polygonal boss corresponding to the inner side wall of the connecting hole, and the side wall of the seat body is also provided with a through hole;

the locking assembly comprises an outer locking sleeve which is sleeved on the periphery of the seat body in a sliding manner along the axial direction of the connecting shaft, a locking piece which is movably arranged in the through hole and is abutted against the inner side wall of the outer locking sleeve, and a first elastic piece which is positioned between the seat body and the outer locking sleeve; the outer locking sleeve is driven by the first elastic piece to move towards the direction close to the connecting platform so as to push the locking piece to act on the first inclined plane on the connecting shaft and further drive the connecting shaft and the connecting platform and the base body to be close to each other so that the polygonal boss and the spline structure are tightly attached.

Furthermore, the polygonal boss is a hexagonal boss, and each side surface of the hexagonal boss inclines towards the inner side close to the connecting shaft; each hole wall on the spline structure inclines towards the outer side far away from the connecting hole.

Furthermore, the locking assembly also comprises an inner locking sleeve which is arranged in the seat body in a sliding manner, and a second elastic piece which is elastically arranged between the seat body and the inner locking sleeve; the elastic force drive of second elastic component interior locking cover is to being close to the direction motion of connecting the platform, in order to promote the retaining member is to being close to the direction motion of outer locking cover.

Further, the through-hole is in the even interval arrangement of periphery wall of pedestal has a plurality ofly, every a retaining member is installed to the correspondence in the through-hole.

Furthermore, the through hole is a bead hole with openings at two sides, the locking piece is installed on the steel ball in the bead hole, the hole depth of the bead hole is smaller than the diameter of the steel ball, and at least one part of the steel ball is exposed from the opening at one side of the bead hole.

Furthermore, a compression sleeve is connected to the inner side of the outer locking sleeve, and the lower end face of the compression sleeve abuts against the upper end of the first elastic piece; the pressing sleeve faces the inner side wall of the steel ball, and a second inclined plane which inclines outwards and can abut against the steel ball is arranged on the inner side wall of the steel ball.

Furthermore, the inner side of the outer locking sleeve is provided with an outer limiting boss, and the outer wall of the seat body is provided with an outer limiting end face matched with the outer limiting boss.

Furthermore, an inner limiting boss is arranged on the outer side of the inner locking sleeve, and an inner limiting end face matched with the inner limiting boss is arranged on the inner wall of the base body.

Furthermore, the lower end of the base body is connected with a chassis, the first elastic piece is elastically arranged between the upper end surface of the chassis and the lower end surface of the pressing sleeve, and the second elastic piece is elastically arranged between the upper end surface of the chassis and the inner locking sleeve.

Furthermore, the peripheral wall of the outer locking sleeve is provided with a convex end which protrudes outwards.

The technical scheme of the utility model has the following advantages:

1. according to the quick-assembly seat, in a free state, the outer locking sleeve moves towards the direction close to the connecting platform under the action of the elastic force of the first elastic piece, and the outer locking sleeve pushes the locking piece located in the through hole of the seat body to move towards one side close to the connecting shaft; when the connecting platform is inserted into the seat body, the connecting shaft on the connecting platform extends into the connecting hole above the seat body, when the connecting shaft is pressed down to a critical position for triggering locking, the polygonal boss on the connecting platform and the spline structure on the seat body are partially overlapped, the connecting platform is continuously pressed down into the connecting platform, the abdicating space on the connecting shaft corresponds to the position of the locking piece, the locking piece is triggered to be locked instantly, the locking piece moves inwards under the action of the first elastic piece to enter the abdicating space and generate an acting force on the connecting shaft in a direction which is downwards close to the seat body through the first inclined plane on the outer wall of the connecting shaft, so that the polygonal boss on the connecting platform and the spline structure on the seat body are tightly matched, the connecting platform and the seat body are locked, the locking structure can eliminate a gap at the connecting position of the connecting platform and the seat body, and can prevent the connecting platform and the seat body from axial movement and radial rotation along the connecting shaft, the problem of rocking of connection platform has been solved. When the connecting platform needs to be disassembled and assembled, the outer locking sleeve is pulled downwards, the space for the locking piece to move outwards is made available to the outer locking sleeve at the moment, the connecting platform and the connecting shaft are pulled outwards from the connecting hole in the upper end of the base body, the connecting shaft acts on the locking piece through the first inclined plane, the locking piece moves out towards the outside of the base body, the connecting shaft is not pressed by the locking piece any more, and the connecting platform can be pulled out completely. The quick-mounting seat has the advantages of simple mounting structure, quick disassembly and assembly, elimination of shaking and the like, and is favorable for improving the shooting quality of photographic equipment mounted on the connecting platform. Moreover, when the shooting equipment is installed on the connecting platform, the shooting equipment can be held by both hands for assembly, and particularly when heavy machine equipment is installed, the assembly is more labor-saving and safe, and the phenomenon that the equipment falls and is damaged in the installation process due to the fact that the machine equipment is not stably held by one hand is prevented.

2. According to the quick-mounting seat provided by the utility model, the connection end surfaces of the connection platform and the seat body are tightly attached by adopting the hexagonal boss and the spline structure, so that the connection tightness between the connection platform and the seat body can be improved, and the problem of shaking of the connection platform is prevented.

3. According to the quick-assembly seat provided by the utility model, the inner locking sleeve and the second elastic piece are arranged in the seat body, and the outer locking sleeve and the first elastic piece are matched, so that whether the quick-assembly seat completes assembly and locking can be judged through sound generated when the inner locking sleeve and the outer locking sleeve trigger locking action, and the problem that the connecting platform and shooting equipment on the connecting platform fall off due to releasing of the connecting platform because locking is not completely completed in the assembly process is avoided.

4. According to the quick-assembly seat provided by the utility model, the protruding end protruding outwards is arranged on the outer peripheral wall of the outer locking sleeve, so that the outer locking sleeve can be pulled down by hand conveniently, and the operation is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a front view of a quick mount in an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a quick mount in an embodiment of the present invention;

FIG. 3 is a schematic perspective view of a quick connector assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a quick socket assembly according to an embodiment of the utility model.

Description of reference numerals: 1. a quick joint assembly; 11. connecting the platform; 111. a hexagonal boss; 12. a connecting shaft; 121. a first inclined plane; 13. a screw; 2. a quick-connect seat assembly; 21. a base body; 211. connecting holes; 212. A through hole; 213. a spline structure; 214. an outer limit end face; 215. an inner limiting end face; 22. an outer locking collar; 221. an outer limit boss; 222. a protruding end; 23. steel balls; 24. a first elastic member; 25. a chassis; 26. an inner locking sleeve; 261. an inner limiting boss; 27. a second elastic member; 28. a compression sleeve; 281. a second inclined plane.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A quick mount as shown in fig. 1-4 includes a connector assembly and a connector mount assembly. The connector assembly comprises a connecting platform 11 and a connecting shaft 12, wherein a screw 13 for connecting the photographic equipment is mounted on the connecting platform 11, and one end of the screw 13 extends outwards from the upper surface of the connecting platform 11. The connecting platform 11 is composed of an upper plate body and a lower plate body, and the whole connecting platform is of a downward convex structure; a plate body of the connecting platform 11 below is integrally formed with a polygonal boss located on the periphery of the connecting shaft 12. A connecting shaft 12 is connected to the inner cavity of a panel positioned below the connecting platform 11, the connecting shaft 12 is a hollow shaft, and the other end of a screw 13 extends into the connecting shaft 12; an abdicating space is arranged on the outer side wall of the insertion end of the connecting shaft 11, and a first inclined surface 121 is formed on the inner wall surface of the abdicating space. In this embodiment, the polygonal boss is specifically the hexagonal boss 111, and in other alternative embodiments, the polygonal boss may also be an octagonal boss or a hexagonal boss, and the number of corners of the polygonal boss may be adaptively selected as needed.

The connecting socket assembly includes a socket body 21 and a locking assembly for locking the socket body 21 and the connecting shaft 12. The top of the base body 21 is provided with a connecting hole 211 for inserting the connecting shaft 12, and the upper end of the base body 21 is formed with a spline structure 213 matched with the hexagonal boss 111 corresponding to the inner side wall of the connecting hole 111; the side wall of the base 21 is further provided with a through hole 212. The locking assembly comprises an outer locking sleeve 22 which is sleeved on the periphery of the seat body 21 along the axial sliding direction of the connecting shaft 12, a locking member which is movably arranged on the through hole 212 and is abutted against the inner side wall of the outer locking sleeve 22, and a first elastic member 24 which is positioned between the seat body 21 and the outer locking sleeve 22. The outer locking sleeve 22 is driven by the first elastic element 24 to move toward the connecting platform 11 to push the locking element to act on the first inclined surface 121 of the connecting shaft 12, so as to drive the connecting shaft 12, the connecting platform 11 and the seat body 21 to approach each other, so that the hexagonal boss 111 and the spline structure 213 are tightly attached to each other.

Specifically, each side surface of hexagonal boss 111 is inclined at a predetermined angle toward the inner side close to connecting shaft 12; the respective bore walls on the spline structures 213 are inclined at a predetermined angle toward the outside away from the connecting shaft 11; and the inclination angle of hexagonal boss 111 and spline structure 213 is the same to make hexagonal boss 111 and spline structure 213 can fully closely cooperate, both do not rock the clearance after the installation, effectively guarantee to shoot the quality.

In this embodiment, the through hole 212 is a ball hole having openings at both sides, and the locker is mounted on the steel ball 23 in the ball hole. The hole depth of the ball hole is smaller than the diameter of the steel ball 23, and at least one part of the steel ball 23 is exposed from the opening at one side of the ball hole. The bead holes are uniformly arranged on the peripheral wall of the seat body 21 at intervals, and a steel ball 23 is correspondingly arranged in each bead hole.

In this embodiment, the inner sidewall of the outer lock sleeve 22 is fixedly connected with a pressing sleeve 28 through a thread structure, a lower end surface of the pressing sleeve 28 abuts against the upper end of the first elastic element 24, and a second inclined surface 281 which inclines outwards and can abut against the steel balls 23 is arranged on the inner sidewall of the pressing sleeve 28 facing the steel balls 23. The outer lock sleeve 22 and the pressing sleeve 28 are designed to be of a split structure, and compared with a mode that the second inclined surface 281 is directly arranged on the inner wall of the outer lock sleeve 22 in the prior art, the process manufacturing difficulty of the outer lock sleeve 22 can be reduced. In an alternative embodiment, the outer locking sleeve 22 and the compression sleeve 28 may also be of one-piece construction.

In this embodiment, a bottom plate 25 is connected to the lower end of the seat body 21, and the first elastic element 24 is a compression spring elastically disposed between the upper end surface of the bottom plate 25 and the lower end surface of the pressing sleeve 28. The locking assembly further comprises an inner locking sleeve 26 slidably disposed inside the seat body 21, and a second elastic member 27 elastically disposed between the chassis 25 and the inner locking sleeve 26; the elastic force of the second elastic member 27 drives the inner locking sleeve 36 to move in a direction approaching the connection platform 1 to push the steel balls 23 to move in a direction approaching the outer locking sleeve 22. The second elastic member 27 is a compression spring elastically disposed between the upper end surface of the chassis 25 and the inner lock sleeve 26. The elastic force of the first elastic member 24 is greater than the elastic force of the second elastic member 27.

In this embodiment, an outer limit boss 221 is integrally formed on the inner side of the outer lock sleeve 22, and an outer limit end surface 214 matched with the outer limit boss 221 is formed on the outer wall of the seat body 21. An inner limiting boss 261 is integrally formed on the outer side of the inner locking sleeve 26, and an inner limiting end face 215 matched with the inner limiting boss 261 is formed on the inner wall of the seat body 21.

In this embodiment, the outer peripheral wall of the outer locking sleeve 22 is provided with an outwardly projecting projection 222. The outer circumferential wall of the outer locking sleeve 22 is provided with a protruding end 222 protruding outwards, which facilitates the operation of pulling down the outer locking sleeve 22 by hand.

The working principle of the quick-assembly seat structure is as follows: in the free state, the outer locking sleeve 22 and the pressing sleeve 28 connected to the inner side of the outer locking sleeve 22 move in the direction approaching the connecting platform 11 under the elastic force of the first elastic member 24, the pressing sleeve 28 pushes the steel ball 23 located in the ball hole of the seat body 21 to move in the direction approaching the inner side of the connecting shaft 12 through the first inclined surface 281, and the steel ball 23 is pressed above the inner locking sleeve 26 to make the second elastic member 27 in the elastic compression state. The outer locking sleeve 22 is pulled downwards, when the second inclined surface 281 on the pressing sleeve 28 is separated from the steel ball 23, the space of the outward movement of the steel ball 23 is emptied, at the moment, the inner locking sleeve 26 moves upwards under the action of the second elastic piece and pushes the steel ball 23 outwards, at the moment, the steel ball 23 is limited in the space near the outside of the seat body 21 by the inner locking sleeve 26, the outer locking sleeve 22 and the pressing sleeve 28 are tightly pushed under the action of the first elastic piece 24 to be tightly against the limiting position where the steel ball 23 protrudes outwards, the hand can be loosened at the moment, and the whole quick-release seat enters a state to be triggered. The connecting shaft 12 on the connecting platform 11 is inserted downwards into the connecting hole 211 in the seat body 21, when the connecting shaft 12 is pressed downwards to a critical position for triggering locking, the hexagonal boss 111 on the connecting platform 11 and the spline structure 213 on the seat body 21 are partially overlapped, and continuously pressed downwards into the connecting platform 11, the abdicating space on the connecting shaft 12 corresponds to the position of the steel ball 23, and the locking is triggered instantly, the steel ball 23 moves inwards under the action of the first elastic piece 24 and the pressing sleeve 28 and presses the first inclined plane 121 on the outer wall of the connecting shaft 12, the steel ball 23 generates an acting force on the connecting shaft 12 in the direction of approaching the seat body 21 downwards through the first inclined plane 121 on the outer wall of the connecting shaft 12, so that the hexagonal boss 111 on the connecting platform 11 is tightly matched with the spline structure 213 on the seat body 21, at this time, the connecting platform 11 and the seat body 21 are locked, and the locking structure can eliminate the gap at the connecting position of the connecting platform 11 and the seat body 21, the axial movement and the radial rotation of the connecting platform 11 and the seat body 21 along the connecting shaft 12 can be prevented, and the problem of shaking of the connecting platform 11 is solved. When the connecting platform 11 needs to be disassembled and assembled, the outer locking sleeve 22 is pulled downwards, at this time, the outer locking sleeve 22 gives up a space for the steel ball 23 to move outwards, the connecting platform 11 and the connecting shaft 12 are pulled outwards from the connecting hole 211 at the upper end of the seat body 21, the connecting shaft 12 acts on the steel ball 23 through the first inclined surface 121, the steel ball 23 moves outwards towards the outer side of the seat body 21 and blocks the space for the pressing sleeve 28 and the outer locking sleeve 22 to move upwards, the steel ball 23 does not press the connecting shaft 12 any more, the inner locking sleeve 26 pushes the steel ball 23 outwards under the action of the second elastic part 27, at this time, the connecting platform 11 is released, and meanwhile, the whole quick disassembling seat enters a to-be-assembled state to be triggered again.

This kind of fast-assembling seat has following advantage:

1. when the machine equipment of shooting is installed, the quick detach seat enters into the state of waiting to trigger, can liberate both hands and grip equipment and assemble, especially when carrying out heavier machine equipment installation, and is more laborsaving, safe, prevents to cause the installation equipment to fall the damage because of the one hand grips the machine equipment unstability.

2. When triggering locking, the hexagonal boss 111 and the spline structure 213 are partially overlapped, the connecting shaft 12 and the connecting platform 11 are necessarily locked in a complete direction under the action of the first elastic element 24, and the connecting platform 11 cannot fall out, so that the safety of installing machine equipment is effectively guaranteed.

3. The plane of hexagonal boss 111 and the angular position of spline structure 213 can fully closely laminate under the locking state, and the quick detach seat does not have the clearance of rocking after the installation, effectively guarantees to shoot the quality.

4. The sound of each part action in-process is loud when triggering locking, whether the quick detach seat finishes assembling locking is easier to judge, and the condition that the connecting platform 11 is loosened and falls off due to insufficient insertion of the connecting platform 11 in the other quick detach processes is avoided.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. A quick mount, comprising:

the connecting platform (11) is connected with a connecting shaft (12) and a polygonal boss positioned on the periphery of the connecting shaft (12), an abdicating space is arranged on the periphery of the connecting shaft (12), and a first inclined plane (121) is arranged on the inner wall surface of the abdicating space;

the top of the base body (21) is provided with a connecting hole (211) for the connecting shaft (12) to be inserted into, the upper end of the base body (21) is provided with a spline structure (213) matched with the polygonal boss corresponding to the inner side wall of the connecting hole (211), and the side wall of the base body (21) is also provided with a through hole (212);

the locking assembly comprises an outer locking sleeve (22) which is sleeved on the periphery of the seat body (21) in a sliding manner along the axial direction of the connecting shaft (12), a locking piece which is movably arranged in the through hole (212) and is abutted against the inner side wall of the outer locking sleeve (22), and a first elastic piece (24) which is positioned between the seat body (21) and the outer locking sleeve (22); the outer locking sleeve (22) is driven by the first elastic piece (24) to move towards the direction close to the connecting platform (11) so as to push the locking piece to act on the first inclined plane (121) on the connecting shaft (12) and further drive the connecting shaft (12) and the connecting platform (11) and the base body (21) to be close to each other so that the polygonal boss and the spline structure (213) are tightly attached to each other.

2. The quick-mount seat according to claim 1, characterized in that said polygonal projection is a hexagonal projection (111), each side of said hexagonal projection (111) being inclined towards the inside close to said connecting shaft (12); each hole wall on the spline structure (213) is inclined towards the outer side far away from the connecting hole (211).

3. The quick mount according to claim 1, characterized in that said locking assembly further comprises an inner locking collar (26) slidingly disposed inside said seat body (21), and a second elastic member (27) elastically disposed between said seat body (21) and said inner locking collar (26); the elastic force of the second elastic piece (27) drives the inner locking sleeve (26) to move towards the direction close to the connecting platform (11) so as to push the locking piece to move towards the direction close to the outer locking sleeve (22).

4. The quick-assembly seat according to claim 3, characterized in that said through holes (212) are uniformly spaced around the peripheral wall of said seat body (21), and each through hole (212) has a corresponding locking member mounted therein.

5. The quick-assembling seat according to claim 4, characterized in that said through hole (212) is a ball hole with openings on both sides, said locking member is mounted on a steel ball (23) in said ball hole, the hole depth of said ball hole is smaller than the diameter of said steel ball (23), and at least a portion of said steel ball (23) is exposed from one side opening of said ball hole.

6. The quick mount according to claim 5, characterized in that a pressing sleeve (28) is connected to the inner side of the outer locking sleeve (22), and the lower end face of the pressing sleeve (28) abuts against the upper end of the first elastic member (24); and a second inclined surface (281) which inclines outwards and can be abutted against the steel ball (23) is arranged on the inner side wall of the pressing sleeve (28) facing the steel ball (23).

7. The quick mounting seat according to claim 1, characterized in that the inner side of the outer locking sleeve (22) is provided with an outer limit boss (221), and the outer wall of the seat body (21) is provided with an outer limit end surface (214) matched with the outer limit boss (221).

8. The quick mounting seat according to claim 3, characterized in that the outer side of the inner locking sleeve (26) is provided with an inner limit boss (261), and the inner wall of the seat body (21) is provided with an inner limit end surface (215) matched with the inner limit boss (261).

9. The quick mount according to claim 6, characterized in that a bottom plate (25) is connected to the bottom end of the mount body (21), the first elastic member (24) is elastically disposed between the upper end surface of the bottom plate (25) and the lower end surface of the pressing sleeve (28), and the second elastic member (27) is elastically disposed between the upper end surface of the bottom plate (25) and the inner locking sleeve (26).

10. The quick-fit seat according to claim 6, characterized in that the outer peripheral wall of the outer locking collar (22) is provided with outwardly projecting ends (222).