CN115962206A

CN115962206A - Connecting mechanism

Info

Publication number: CN115962206A
Application number: CN202210646408.0A
Authority: CN
Inventors: 金俊良
Original assignee: Jiangmen Guangli Electronic Technology Co ltd
Current assignee: Jiangmen Guangli Electronic Technology Co ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2023-04-14
Anticipated expiration: 2042-06-08
Also published as: CN115962206B; WO2023237005A1

Abstract

The invention relates to a connecting mechanism which comprises a connecting main body, a limiting slide rod and an elastic piece, wherein the connecting main body comprises a shaft body part, a first head part and a second head part which are connected to two ends of the shaft body part; the limiting slide rod is arranged in the sliding groove in a sliding mode along the axial direction of the shaft body, one end of the limiting slide rod can slide to a first state and a second state at least, when the limiting slide rod is in the first state, one end of the limiting slide rod at least partially exceeds the sliding groove and is overlapped with the first head or the second head in the radial direction of the shaft body, the overlapped part of the limiting slide rod and the first head or the second head protrudes out of the outer peripheral face of the first head or the second head in the radial direction of the shaft body, and when the limiting slide rod is in the second state, the limiting slide rod is not overlapped with the first head or the second head in the radial direction of the shaft body. The connecting mechanism and the corresponding locking piece are in a plug-in connection mode, so that the operation difficulty is simplified, and the efficiency is improved.

Description

Connecting mechanism

Technical Field

The invention relates to the technical field of structural connection, in particular to a connecting mechanism.

Background

In the field of content creation such as television, movie and stage shooting in the related art, the fixing of the scenery elements such as lamps, video walls and green curtains is usually performed by fixing the scenery elements to the object to be fixed through screws and bolts, but the fixing method is usually troublesome and requires tools, and when fixing heavier scenery elements, more hands are often needed for fixing, which results in waste of manpower.

Disclosure of Invention

The invention aims to provide a connecting mechanism with higher connecting and disassembling efficiency.

According to an aspect of the present invention, there is provided a connection mechanism, comprising:

the connecting body comprises a shaft body part, a first head part and a second head part, wherein the first head part and the second head part are connected to two ends of the shaft body part;

the limiting slide bar is arranged in the sliding groove in a sliding mode along the axial direction of the shaft body, one end of the limiting slide bar can slide to at least a first state and a second state, when the limiting slide bar is in the first state, one end of the limiting slide bar at least partially exceeds the sliding groove and is overlapped with the first head or the second head in the radial direction of the shaft body, the overlapped part of the limiting slide bar and the first head or the second head is protruded out of the outer peripheral surface of the first head or the second head in the radial direction of the shaft body, and when the limiting slide bar is in the second state, the limiting slide bar is not overlapped with the first head or the second head in the radial direction of the shaft body; and

the elastic piece is arranged in the sliding groove, one end of the elastic piece is abutted to the limiting slide rod, the other end of the elastic piece is abutted to the shaft body, and when external force is not applied, the elastic piece acts on the limiting slide rod, and the elastic force of the elastic piece can drive the limiting slide rod to be maintained in the first state.

As an embodiment of the present invention, the sliding groove includes a guide groove, a limiting groove, and a limiting through hole communicating the guide groove and the limiting groove, the guide groove, the limiting groove, and the limiting through hole all extend along an axial direction of the shaft body, one end of the guide groove penetrates through the shaft body along the axial direction of the shaft body, the guide groove and the limiting groove are respectively formed on two opposite sides of the shaft body, the limiting slide rod includes a main slide rod slidably disposed in the guide groove, a limiting rod integrally formed on one side of the main slide rod, and a toggle portion integrally formed on the other side of the main slide rod, the toggle portion extends out of the guide groove along a radial direction of the shaft body, the limiting rod penetrates through the limiting through hole and extends into the limiting groove, the elastic member is disposed in the limiting groove, one end of the elastic member abuts against the limiting rod, and the other end of the elastic member abuts against the shaft body.

As an embodiment of the present invention, the guide groove includes an upper groove portion and a lower groove portion, a bottom wall of the upper groove portion is recessed inward in a radial direction to form the lower groove portion, one end of the upper groove portion penetrates the shaft body portion in an axial direction of the shaft body portion, one end of the upper groove portion penetrating the shaft body portion is a first end, the main slide bar includes an upper slide bar portion provided in the upper groove portion, and a lower slide bar portion located in the lower groove portion, in the first state, an end portion of the lower slide bar portion facing the first end abuts on an inner wall of one end of the lower groove portion facing the first end, and the stopper bar abuts on an inner wall of one end of the stopper through hole facing the first end.

As an embodiment of the present invention, a length of the lower groove portion extending along the axial direction of the shaft body portion is L1, a length of the lower slide rod portion extending along the axial direction of the shaft body portion is L2, and a length of the through hole extending along the axial direction of the shaft body portion is L3, where L1-L2= L3.

As an embodiment of the present invention, a guide hole communicating with the lower groove portion is formed in the first head portion or the second head portion facing the first end in the axial direction of the shaft body portion, a guide rod portion is integrally formed on the upper slide rod portion or the lower slide rod portion, and the guide rod portion is slidably inserted in the guide hole in the axial direction of the shaft body portion.

As an embodiment of the present invention, an assembly rod portion is integrally formed on the limiting rod, the assembly rod portion is disposed in the limiting groove, the elastic member is a spring, and the spring is sleeved on the assembly rod portion.

As an embodiment of the present invention, the connecting mechanism further comprises a limiting component, and the limiting component can limit the limiting slide rod to slide from the first state to the second state.

As an embodiment of the present invention, the limiting slide bar includes a toggle portion extending out of the sliding groove along a radial direction of the shaft body portion, the limiting component is the toggle portion, one end of the sliding groove penetrating through the shaft body portion is a first end, and when the first head portion or the second head portion far away from the first end is locked with the external locking member, one end of the external locking member facing the toggle portion is located on a path along which the limiting slide bar moves from the first state to the second state.

As an embodiment of the present invention, a first pin hole is formed in the shaft body portion along a radial direction thereof, a second pin hole is formed in the main slide bar, the first pin hole and the second pin hole are aligned in the first state, and the limiting assembly includes a pin shaft detachably inserted into the first pin hole and the second pin hole.

As an embodiment of the present invention, a first pin hole is formed in the shaft body portion along the radial direction of the shaft body portion, the limiting slide bar includes a toggle portion extending out of the sliding groove along the radial direction of the shaft body portion, the limiting assembly includes a pin shaft, the pin shaft is detachably inserted into the first pin hole, one end of the pin shaft can extend out of the first pin hole, and a portion extending out of the first pin hole is located on a path along which the limiting slide bar moves from the first state to the second state.

As an embodiment of the present invention, the shaft portion, the first head portion and the second head portion are integrally formed.

As an embodiment of the present invention, the first head portion includes a first central shaft that is the same as the axial direction of the shaft body portion, and a first protruding portion and a second protruding portion that are formed to protrude outward in the radial direction of the first central shaft, the first protruding portion and the second protruding portion are disposed at intervals around the central axis of the first central shaft, and the first protruding portion and the second protruding portion are symmetrically disposed, the first protruding portion and the second protruding portion are disposed at intervals with the shaft body portion in the axial direction of the shaft body portion, and the interval is X1, a portion of one end of the limiting slide bar that exceeds the slide groove overlaps with the first head portion in the radial direction of the shaft body portion, a length of a portion of the limiting slide bar that exceeds the slide groove does not exceed X1, and a portion of the limiting slide bar that exceeds the slide groove does not overlap with the first protruding portion and the second protruding portion in the axial direction of the first central shaft.

As an embodiment of the present invention, the second head portion includes a second central axis which is the same as the axial direction of the shaft body portion, and an annular projection which is formed to project outward in the radial direction of the second central axis and is provided at a distance from the shaft body portion in the axial direction of the shaft body portion.

As an embodiment of the present invention, the shaft body portion includes a first shaft portion and a second shaft portion integrally formed on the first shaft portion, an outer diameter of the first shaft portion is larger than an outer diameter of the second shaft portion, a step is formed between the first shaft portion and the second shaft portion, the sliding groove is formed on the second shaft portion, the connecting mechanism further includes a casing, the casing is sleeved on the second shaft portion, a sliding hole is formed in a position of the casing corresponding to the sliding groove, a length of the second shaft portion is the same as a length of the casing, and one end of the casing abuts against the step.

The embodiment of the invention has the following beneficial effects:

in the connection mechanism in this embodiment, since the limiting slide bar in this embodiment can slide to the first state and the second state, the first head portion or the second head portion can be conveniently connected to the corresponding locking member in two different states. For example, the corresponding locking member has a first slot and a second slot adapted to the first head and the limit slide bar, respectively, and in the first state, when the portion of the limit slide bar beyond the slide slot is inserted into the second slot, the first head is restricted from rotating relative to the first slot, thereby completing the desired fitting relationship. And coupling mechanism in this embodiment is the form of pegging graft with the locking piece that corresponds, can simplify the operation degree of difficulty, improves and dismantles efficiency.

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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only 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 schematic view of a connection mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a connection mechanism according to an embodiment of the present invention;

FIG. 3 is one of the exploded schematic views of the coupling mechanism of FIG. 2;

FIG. 4 is a second exploded view of the connection mechanism of FIG. 2;

FIG. 5 is a cross-sectional view of the coupling mechanism of FIG. 2;

FIG. 6 is a schematic structural view of a limiting slide bar in another embodiment;

FIG. 7 is a schematic view of the first locking member;

FIG. 8 is a cross-sectional view of the first locking member of FIG. 7;

FIG. 9 is a schematic structural view of the second locking member;

FIG. 10 is a cut-away view of the second locking member of FIG. 9;

FIG. 11 is one of the schematic partial structural views of the second locking member of FIG. 9;

FIG. 12 is a second partial schematic structural view of the second locking member shown in FIG. 9;

FIG. 13 is a schematic diagram of another perspective view of a portion of the structure of FIG. 12;

wherein: 10. a connecting mechanism; 20. a first locking member; 21. an accommodating cavity; 22. limiting the jacks; 22a and a middle shaft hole; 22b, side holes; 30. a second locking member; 100. a connecting body; 110. a shaft body portion; 111. a chute; 1111. a guide groove; 1111a, an upper groove part; 1111b, a lower groove part; 1112. a limiting groove; 1113. a limiting through hole; 113. a first shaft portion; 114. a second shaft portion; 1134. a step; 120. a first head portion; 121. a first central shaft; 122. a protrusion; 1221. a first boss portion; 1222. a second boss; 130. a second head; 131. a second central axis; 132. an annular projection; 133. an annular groove; 200. a limiting slide bar; 210. a main slide bar; 211. an upper slide bar part; 212. a lower sliding rod part; 213. a guide rod part; 220. a limiting rod; 221. assembling a rod part; 230. a toggle part; 300. an elastic member; 400. a housing; 410. a slide hole; 500. a base; 510. mounting through holes; 511. a first port; 512. a second port; 600. a base plate; 610. a first plane; 700. a limiting member; 710. half shaft holes; 720. a notch; 730. a second plane; 741. a first connection face; 742. a second connection face; 750. an inclined surface; 800. a mounting seat; 810. assembling the groove; 820. a limiting hole; 830. a guide through hole; 840. a guide chute; 850. a limiting channel wall; 910. a spring member; 920. a pressing member; 930. a security member.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for purposes of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 13, an embodiment of the present invention provides a connecting mechanism 10, in which the connecting mechanism 10 in the embodiment is mainly used to connect two different locking members, and the connecting mechanism 10 in the embodiment is mainly used in the field of fixed connection of devices, especially in the field of content creation such as television, movie and stage shooting. For example, the method can be applied to fixedly connected scene elements such as shooting lamps, reflectors, diffusers, video walls, cameras, green screens, textiles and the like.

Referring to fig. 2-6, the connecting mechanism 10 of the present embodiment includes a connecting body 100, the connecting body 100 includes a shaft portion 110, and a first head portion 120 and a second head portion 130 connected to two ends of the shaft portion 110; the first head 120 and the second head 130 are each used to connect two different locking members, which in turn can connect two different objects.

The shaft body 110 is provided with a sliding groove 111, the sliding groove 111 extends along the axial direction of the shaft body 110, and one end of the sliding groove 111 penetrates through the shaft body 110 along the axial direction of the shaft body 110; the connecting mechanism 10 further includes a limiting slide bar 200, the limiting slide bar 200 is disposed in the sliding slot 111 in an axial direction of the shaft body 110, and one end of the limiting slide bar 200 can slide to at least a first state and a second state, in the first state, one end of the limiting slide bar 200 at least partially exceeds the sliding slot 111 and overlaps with the first head 120 or the second head 130 in a radial direction of the shaft body 110, and a portion of the limiting slide bar 200 overlapping with the first head 120 protrudes from an outer peripheral surface of the first head 120 or the second head 130 in the radial direction of the shaft body 110, in the second state, the limiting slide bar 200 does not overlap with the first head 120 or the second head 130 in the radial direction of the shaft body 110. Since the position-limiting sliding rod 200 in the present embodiment can slide to the first state and the second state, the two different states can facilitate the connection of the first head 120 or the second head 130 with the corresponding locking member.

For example, in one embodiment, one end of the stop slide 200 extends at least partially beyond the slide slot 111 and overlaps the first head 120 in the radial direction of the shaft body 110, and the locking member has a first slot and a second slot adapted to the first head 120 and the stop slide 200, respectively, such that in the first state, when the portion of the stop slide 200 extending beyond the slide slot 111 is inserted into the second slot, the first head 120 is restricted from rotating relative to the first slot, thereby achieving the desired engagement.

Referring to fig. 1 to 8, in another embodiment, the locking member locked to the first head 120 is set as the first locking member 20, one end of the limiting slide 200 at least partially exceeds the sliding slot 111 and overlaps the first head 120 in the radial direction of the shaft body 110, in the second state, the first head 120 can be assembled with the first locking member 20, and when the first head 120 rotates relative to the first locking member 20 by a predetermined angle, the limiting slide 200 can be switched from the second state to the first state, and in the first state, the overlapping portion of the limiting slide 200 and the first head 120 can limit the rotation of the first head 120 relative to the first locking member 20.

Specifically, the connection method between the first head 120 and the first locking member 20 in this embodiment is as follows: firstly, the limiting slide bar 200 is moved to the second state, the first head 120 is assembled on the first locking part 20, then the first head 120 is rotated and the first head 120 is rotated by a preset angle, at the moment, the first head 120 is locked with the first locking part 20, then the limiting slide bar 200 is moved to enable the limiting slide bar 200 to be changed from the second state to the first state, at the moment, the first head 120 can not rotate relative to the first locking part 20 any more, so that the first head 120 can not be taken down from the first locking part 20, and the connection stability of the first head 120 and the first locking part 20 can be ensured. When the first head 120 needs to be removed from the first locking member 20, the position-limiting sliding rod 200 is first moved to move the position-limiting sliding rod 200 from the first state to the second state, and at this time, the first head 120 can be rotated to remove the first head 120 from the first locking member 20. Through the cooperation between the connecting mechanism 10 and the first locking part 20 in this embodiment, the connecting mechanism 10 and the first locking part 20 can be quickly locked and separated, and the connecting efficiency is improved.

Further, the connecting mechanism 10 further includes an elastic member 300, the elastic member 300 is disposed in the sliding slot 111, one end of the elastic member 300 abuts against the limit slide bar 200, and the other end of the elastic member 300 abuts against the shaft body 110, so that when no external force is applied, the elastic force of the elastic member 300 acting on the limit slide bar 200 can drive the limit slide bar 200 to maintain the first state. By the action of the elastic member 300 on the position-limiting sliding rod 200, the position-limiting sliding rod 200 can be maintained in the first state without applying an elastic force exceeding that of the elastic member 300, so that the first head 120 cannot rotate, and the first head 120 and the first locking member 20 can be stably connected together. When the first head 120 needs to be taken out from the first locking member 20, an external force needs to be applied to the limiting slide bar 200, so that the limiting slide bar 200 moves from the first state to the second state, and at this time, the first head 120 can rotate and be taken out from the first locking member 20.

In a specific embodiment, the first head portion 120 includes a first central axis 121 that is the same as the axial direction of the shaft portion 110, a protruding portion 122 that protrudes outward in the radial direction of the first central axis 121, and the protruding portion 122 and the shaft portion 110 are disposed at an interval in the axial direction of the shaft portion 110, and the interval is X1; the first locking member 20 is formed with a receiving cavity 21 and a limiting insertion hole 22 communicating with the receiving cavity 21, the axial depth of the limiting insertion hole 22 is less than X1, the limiting insertion hole 22 includes a central shaft hole 22a corresponding to the first central shaft 121 and a side hole 22b corresponding to the protruding portion 122, the correspondence in the foregoing or following embodiments means that the shape and size are substantially the same, in the second state, one end of the first head 120 having the protruding portion 122 can be inserted into the receiving cavity 21 through the limiting insertion hole 22, and when the first head 120 is rotated by a preset angle relative to the first locking member 20, the portion of the limiting slide bar 200 overlapping with the first head 120 moves into the side hole 22b under the driving of the elastic member 300. In this embodiment, since the axial depth of the limiting insertion hole 22 is smaller than X1, it can be ensured that the protruding portion 122 completely enters the receiving cavity 21 in the second state, then the first head 120 is rotated, when the limiting slide bar 200 is rotated by a predetermined angle, the axial direction of the limiting slide bar 200 corresponds to the side hole 22b, at this time, the limiting slide bar 200 can be changed from the second state to the first state under the driving of the elastic member 300, so that the overlapped portion of the limiting slide bar 200 and the first head 120 moves into the side hole 22b, because the overlapped portion of the limiting slide bar 200 and the first head 120 is located in the side hole 22b, and the overlapped portion of the limiting slide bar 200 and the first head 120 protrudes out of the outer peripheral surface of the first central shaft 121, so that the side hole 22b limits the limiting slide bar 200 to rotate relative to the axis of the central shaft hole 22a, and further the protruding portion 122 cannot rotate to correspond to the side hole 22b, and further the protruding portion 122 cannot be separated from the receiving cavity 21, thereby enabling the first head 120 and the first locking member 20 to be stably connected. The protrusion 122 can be taken out from the accommodating cavity 21 only when the limiting slide bar 200 is switched from the first state to the second state by applying an external force to overcome the elastic force of the elastic member 300.

In addition, since the central axis hole 22a corresponds to the first central axis 121, and the overlapping portion of the position-limiting slide bar 200 and the first head 120 protrudes from the outer peripheral surface of the first central axis 121, during normal use, when only the first head 120 is inserted into the position-limiting insertion hole 22, the end surface of the position-limiting insertion hole 22 where the insertion hole is located will abut against the end of the position-limiting slide bar 200 facing the first head 120, so that the position-limiting slide bar 200 will gradually change from the first state to the second state with the insertion of the first head 120, and then the first head 120 is rotated to a preset angle, and the position-limiting slide bar 200 will automatically change from the second state to the first state. In this embodiment, when the first head 120 is mounted on the first locking member 20, the limiting slide bar 200 does not need to be manually controlled to the second state, and the first head 120 may also be mounted on the first locking member 20. The operation convenience performance of the user is improved.

Further, the protrusion 122 includes a first protrusion 1221 and a second protrusion 1222, the first protrusion 1221 and the second protrusion 1222 are spaced around the central axis of the first central shaft 121, the first protrusion 1221 and the second protrusion 1222 are symmetrically disposed, the first protrusion 1221 and the second protrusion 1222 are spaced from the shaft 110 in the axial direction of the shaft 110 by an interval X1, and the length of the portion of the limit slide bar 200 that exceeds the sliding slot 111 does not exceed X1. Since the first and second protruding portions 1221 and 1222 are symmetrically disposed, so that the position-limiting insertion hole 22 has two opposite side holes 22b, no matter which direction is rotated by 90 degrees, the portion of the position-limiting sliding rod 200 that exceeds the sliding slot 111 (the portion overlapping with the first head 120) can be conveniently moved into one of the side holes 22b, so as to achieve the locking of the first head 120 and the first locking member 20.

Preferably, the shape and size of the overlapped part of the limiting slide bar 200 and the first head 120 are matched with the side hole 22b, so that when the first head 120 is locked and locked with the first locking element 20, the first head 120 and the first locking element 20 can be prevented from rotating at a small angle, and the stability of the connection between the first head 120 and the first locking element 20 is improved.

In a specific embodiment, the sliding groove 111 includes a guiding groove 1111, a limiting groove 1112, and a limiting through hole 1113 connecting the guiding groove 1111 and the limiting groove 1112, the guiding groove 1111, the limiting groove 1112, and the limiting through hole 1113 all extend along the axial direction of the shaft body 110, one end of the guiding groove 1111 penetrates the shaft body 110 along the axial direction of the shaft body 110, and the guiding groove 1111 and the limiting groove 1112 are respectively formed on two opposite sides of the shaft body 110. In this embodiment, the guide grooves 1111 and the limiting grooves 1112 are formed on two opposite sides of the shaft body 110, so that the strength of the connecting body 100 at each position can be balanced and the strength of the connecting body 100 at some positions can be prevented from being too low.

Further, the limit slide bar 200 includes a main slide bar 210 slidably disposed in the guide groove 1111, a limit rod 220 integrally formed on one side of the main slide bar 210, and a toggle part 230 integrally formed on the other side of the main slide bar 210, the toggle part 230 extends out of the guide groove 1111 along the radial direction of the shaft body 110, the limit rod 220 passes through the limit through hole 1113 and extends into the limit groove 1112, the elastic member 300 is disposed in the limit groove 1112, one end of the elastic member 300 abuts against the limit rod 220, and the other end of the elastic member 300 abuts against the shaft body 110. The moving distance of the limiting sliding rod 200 in this embodiment is mainly limited by the axial length of the limiting through hole 1113 and the limiting groove 1112 in the shaft body 110.

Preferably, the stopper through-hole 1113 and the stopper groove 1112 are flush toward one end of the second head 130, so that the lengths of the stopper groove 1112 and the stopper through-hole 1113 can be maximally applied.

Further, the guide groove 1111 includes an upper groove portion 1111a and a lower groove portion 1111b, a bottom wall of the upper groove portion 1111a is recessed inward in a radial direction to form the lower groove portion 1111b, one end of the upper groove portion 1111a penetrates the shaft body portion 110 in an axial direction of the shaft body portion 110, one end of the upper groove portion 1111a penetrating the shaft body portion 110 is a first end, one end of the upper groove portion 1111a facing the first head portion 120 is also the first end, the main slide bar 210 includes an upper slide bar portion 211 disposed in the upper groove portion 1111a and a lower slide bar portion 212 located in the lower groove portion 1111b, in a first state, an end portion of the lower slide bar portion 212 facing the first end abuts on an inner wall of the end of the lower groove portion 1111b facing the first end, and the stopper bar 220 abuts on an inner wall of the end of the stopper through hole 1113 facing the first end. In this embodiment, the lower slot portion 1111b and the limiting through hole 1113 limit the limiting slide bar 200, so that the limiting slide bar 200 is stressed at a plurality of positions, and the damage to the limiting slide bar 200 is reduced.

Further, the lower slot portion 1111b has a length L1 extending along the axial direction of the shaft body portion 110, the lower slide rod portion 212 has a length L2 extending along the axial direction of the shaft body portion 110, and the limiting through hole 1113 has a length L3 extending along the axial direction of the shaft body portion 110, where L1-L2= L3. In this embodiment, the lengths of the lower groove portion 1111b, the upper groove portion 1111a, and the limit through hole 1113 are set by the above formula of L1-L2= L3, so that the connection body 100 in this embodiment can maintain the strength required to the maximum extent by the colleagues who meet the grooving requirement by avoiding the failure of the set lower groove portion 1111b, upper groove portion 1111a, limit through hole 1113, and the like.

Referring to fig. 6, in some embodiments, a guide hole (not shown) communicating with the lower groove 1111b is formed through the first head portion 120 facing the first end along the axial direction of the shaft body portion 110, a guide rod portion 213 is integrally formed on the upper slide rod portion 211 or the lower slide rod portion 212, and the guide rod portion 213 is slidably disposed in the guide hole along the axial direction of the shaft body portion 110. Through the guide hole, the sliding rod installed in the sliding slot 111 can be prevented from easily coming out of the sliding slot 111, and can also be used for guiding the sliding of the sliding rod.

Further, the limiting rod 220 is integrally formed with an assembling rod portion 221, the assembling rod portion 221 is disposed in the limiting groove 1112, the elastic member 300 is a spring, and the spring is sleeved on the assembling rod portion 221. The mounting rod 221 can facilitate installation of the spring and prevent the spring from falling out of the retaining groove 1112.

It should be noted that, in some embodiments, the second head portion 130 and the first head portion 120 may be the same, and the second locking member 30 and the first locking member 20 are also the same, in which case, two limiting slide bars 200 are required to be respectively connected with the second locking member 30 and the first locking member 20 in a matching manner.

An embodiment of the present invention also provides a second locking member 30 different from the first locking member 20, the second locking member 30 being adapted to be coupled to the second head portion 130.

Referring to fig. 2-6, in an embodiment, the second head portion 130 includes a second central shaft 131 that is the same as the axial direction of the shaft portion 110, and an annular protrusion 132 that is formed to protrude outward in the radial direction of the second central shaft 131, and the annular protrusion 132 and the shaft portion 110 are disposed at an interval in the axial direction of the shaft portion 110 and surround to form an annular groove 133. It should be noted that the radial cross section of the second central shaft 131 is preferably circular, but may also be other shapes, such as rectangle, square, kidney-shaped, etc., and the shape of the annular protrusion 132 may also be changed appropriately according to the shape of the second central shaft 131, for example, when the radial cross section of the second central shaft 131 is circular, the radial cross section of the annular protrusion 132 is preferably circular, and similarly, the shape of the annular groove 133 also changes according to the shape changes of the second central shaft 131 and the annular protrusion 132.

Preferably, the end surface of the annular protrusion 132 away from the shaft body 110 is flush with the end surface of the second central shaft 131 away from the shaft body 110, so as to facilitate the production and processing of the second head 130, and facilitate the connection and matching between the second locking element 30.

Referring to fig. 9-13, the second locking element 30 of the present embodiment includes a base 500, a bottom plate 600 and a limiting member 700.

The base 500 has a mounting through-hole 510, and the mounting through-hole 510 has a first port 511 and a second port 512 opposite to each other.

The base plate 600 is disposed on the base 500 and the base plate 600 at least partially covers the first port 511 of the mounting through hole 510, after the second head 130 is mounted in the mounting through hole 510, at least a portion of the annular protrusion 132 abuts on the base plate 600 (when it is desired to detach the annular protrusion 132 from the mounting through hole 510 from the first port 511), so that the base plate 600 restricts the annular protrusion 132 from being detached from the mounting through hole 510 from the first port 511.

It should be noted that when the end surface of the annular protrusion 132 away from the shaft body 110 is flush with the end surface of the second central shaft 131 away from the shaft body 110, the bottom plate 600 may completely cover the first port 511, or may not completely cover the first port 511, as long as the annular protrusion 132 is prevented from being separated from the mounting through hole 510 from the first port 511.

For convenience of description, a face of the bottom plate 600 covering the first port 511 toward the second port 512 is defined as a first plane 610, and it should be noted that the plane in this embodiment or each of the embodiments described below is referred to as a substantially plane, and does not refer to a plane in an absolute sense.

The limiting member 700 is disposed on the base 500, the limiting member 700 can partially cover the second port 512 of the installation through hole 510, and the annular protrusion 132 can penetrate into the installation through hole 510 through a position where the second port 512 is not blocked, it should be noted that, the limiting member 700 in this embodiment cannot completely cover the second port 512, but an enough opening area is left for the annular protrusion 132 to be inserted into the installation through hole 510 after the limiting member 700 is covered, and preferably, the annular protrusion 132 completely extends into the installation through hole 510 from the second port 512 along the axial direction of the installation through hole 510.

In order to realize the locking between the second locking element 30 and the second head 130, the limiting member 700 is provided with a half shaft hole 710 adapted to the second central shaft 131, the axial direction of the half shaft hole 710 is the same as the axial direction of the mounting through hole 510, the half shaft hole 710 has a gap 720 along the radial direction of the half shaft hole 710, the second central shaft 131 can enter the half shaft hole 710 through the gap 720, it should be noted that the adaptation of the second central shaft 131 to the half shaft hole 710 means that the size and shape of the second central shaft 131 are substantially the same as the size and shape of the half shaft hole 710, and the size of the half shaft hole 710 is slightly larger than the size of the second central shaft 131, so as to facilitate the second central shaft 131 to enter the half shaft hole 710, for example, when the cross section of the second central shaft 131 is circular, the radial cross section of the half shaft hole 710 is a semicircle substantially the same as the outer diameter of the second central shaft 131.

For convenience of description, a surface of the portion of the limiting member 700 covering the second port 512 facing the first port 511 is set as a second plane 730; the minimum distance between the first plane 610 and the second plane 730 is not smaller than the thickness of the annular projection 132 in the axial direction of the second center shaft 131.

Note that the thickness of each position of the annular protrusion 132 in the axial direction of the second center shaft 131 is uniform.

The use method of the connecting device in the embodiment comprises the following steps: firstly, the second head 130 on the connecting mechanism 10 is inserted into the mounting through hole 510 from the second port 512 until the annular protrusion 132 is completely inserted into the mounting through hole 510, since the minimum distance between the first plane 610 and the second plane 730 is not smaller than the thickness of the annular protrusion 132 in the axial direction of the second central shaft 131, the connecting mechanism 10 is moved in the radial direction of the half-axle hole 710, so that the second central shaft 131 can be moved into the half-axle hole 710, when the second central shaft 131 enters the half-axle hole 710, at this time, part of the limiting member 700 is sleeved in the annular groove 133, one side surface of the annular protrusion 132 facing the shaft body 110 is abutted to the second plane 730, and at this time, the connecting mechanism 10 and the second locking member 30 are in a locked state; when it is necessary to release the locking state of the connecting mechanism 10 and the second locking member 30, the second central shaft 131 is simply moved out of the half shaft hole 710 along the radial direction of the half shaft hole 710, and at this time, the side surface of the annular projection 132 facing the shaft body portion 110 is not in contact with the second plane 730, and the annular projection 132 can be removed from the mounting through hole 510. The connecting mechanism 10 and the second locking member 30 in this embodiment are connected and detached conveniently and quickly, and the working efficiency can be improved.

Preferably, the first plane 610 and the second plane 730 are arranged in parallel, and the distance between the first plane 610 and the second plane 730 is substantially the same as the thickness of the annular protrusion 132 in the axial direction of the second central shaft 131, so that the stability of the fit between the annular protrusion 132 and the installation through hole 510 can be improved, at this time, the second locking member 30 or the connection mechanism 10 can not easily remove the second central shaft 131 from the half shaft hole 710 by the force in other directions except the direction moving to the notch 720 along the radial direction of the half shaft hole 710, and especially, when the first plane 610 covers most of the first port 511, the second central shaft 131 is not easily removed from the half shaft hole 710.

Preferably, the second central shaft 131 is integrally formed with the annular protrusion 132, and the base 500, the bottom plate 600 and the limiting member 700 are integrally formed. Further, the connection strength of the connection device in the present embodiment can be improved.

Since the limiting member 700 needs to maintain the connection strength with the base 500 under a large pressure, the limiting member 700 and the base 500 in this embodiment have the first connection surface 741 and the second connection surface 742, the first connection surface 741 is connected to the inner wall of the installation through hole 510, and the second connection surface 742 is connected to the plane where the second port 512 of the base 500 is located, so that the connection strength between the base 500 and the limiting member 700 can be greatly improved by connecting the first connection surface 741 and the second connection surface 742 to the base 500 on the premise of avoiding that the base 500 is not too large in the axial direction and the radial direction of the installation through hole 510.

In a specific embodiment, the radial cross section of the second central shaft 131 is circular, the radial cross section of the annular protrusion 132 is circular, the radial cross section of the half-shaft hole 710 is semicircular, the second plane 730 is an annular plane and is coaxial with the half-shaft hole 710, and a difference obtained by subtracting the inner diameter from the outer diameter of the annular plane is not less than a difference obtained by subtracting the outer diameter of the second central shaft 131 from the outer diameter of the annular protrusion 132. In this embodiment, since the difference obtained by subtracting the inner diameter from the outer diameter of the annular surface is not less than the difference obtained by subtracting the outer diameter of the second central shaft 131 from the outer diameter of the annular protrusion 132, it can be ensured that after the second central shaft 131 completely enters the half shaft hole 710, one side surface of the annular protrusion 132 facing the shaft body portion 110 can be completely abutted against the second plane 730, so that the contact area between the annular protrusion 132 and the limiting member 700 can be increased, the connection strength between the second locking member 30 and the connection mechanism 10 is improved, and the connection device in this embodiment can bear a heavier object.

Further, the radial section of the mounting through hole 510 is a waist-shaped surface, the waist-shaped surface includes two semi-circular surfaces and a rectangular surface, the diameter of the semi-circular surfaces is adapted to the outer diameter of the annular protrusion 132, it should be noted that the adaptation of the diameter of the semi-circular surfaces to the outer diameter of the annular protrusion 132 means that the diameter of the semi-circular surfaces is substantially the same as the outer diameter of the annular protrusion 132, and the diameter of the semi-circular surfaces is slightly larger than the outer diameter of the annular protrusion 132. Because the radial cross section of installation through-hole 510 is waist profile, and the diameter of the semicircle face of waist profile and the external diameter adaptation of annular bulge 132 to the moving path of annular bulge 132 in installation through-hole 510 is injectd, only can remove along preset direction, thereby can improve user's the simple operation nature, the efficiency of improvement connection or dismantlement.

Further, the distance between the centers of the two semicircular surfaces of the waist-shaped surface is smaller than the outer diameter of the annular protrusion 132, the radius of one of the semicircular surfaces and the circle made by the center on the plane of the second plane 730 are set as a reference circle, and the second plane 730 is not coincident with the reference circle in the axial direction of the installation through hole 510. The reference surface in this embodiment is substantially the same as the outer circumference of the radial section of the annular protrusion 132, and since the second plane 730 is not coincident with the reference surface in the axial direction of the installation through hole 510, it is ensured that the annular protrusion 132 can enter the installation through hole 510 from the second port 512.

In a specific embodiment, the second locking element 30 further includes a mounting seat 800 for mounting the base 500, the mounting seat 800 is provided with a mounting groove 810 and a limiting hole 820 communicated with the mounting groove 810, the limiting hole 820 is adapted to the size and shape of the annular protrusion 132, the base 500 is slidably disposed in the mounting groove 810, the second port 512 faces the limiting hole 820, the base 500 is at least slidable to a third state and a fourth state, and in the third state, the annular protrusion 132 passes through the limiting hole 820 and then enters the mounting through hole 510 through the second port 512; the driving base 500 moves relative to the assembling slot 810 to make the second central shaft 131 enter the half-axle hole 710 through the notch 720, and the base 500 is in the fourth state. The use method of the connecting device in the embodiment comprises the following steps: first, when the base 500 is moved to the third state, the second head 130 is inserted into the limiting hole 820 until the annular protrusion 132 enters the mounting through hole 510 from the second port 512, and then the base 500 is moved so that the half-axis hole 710 on the limiting member 700 is sleeved in the annular groove 133, that is, the second central axis 131 enters the half-axis hole 710 from the notch 720, at this time, the second plane 730 can limit the annular protrusion 132 to be separated from the mounting through hole 510, and in addition, because the limiting hole 820 limits the second head 130 in the radial direction of the limiting hole 820, when the base 500 is in the fourth state, the connection stability between the second locking member 30 and the connection mechanism 10 can be ensured. When the connecting mechanism 10 needs to be detached from the second locking member 30, the base 500 can be moved from the fourth state to the third state by moving the base 500, and then the connecting mechanism 10 can be detached from the second locking member 30.

Further, the stopper 700 is formed with an inclined surface 750, the second plane 730 is located inside the inclined surface 750 on the projection plane of the mounting through hole 510 in the axial direction, and the inclined surface 750 has a partial projection plane on the projection plane of the mounting through hole 510 in both the axial direction and the radial direction, and the distance from the position of the inclined surface 750 closer to the notch 720 to the plane where the second port 512 is located is smaller, and preferably, the distance from the position of the inclined surface 750 corresponding to the notch 720 to the plane where the second port 512 is located is 0. In this embodiment, since the second plane 730 is located in the inclined plane 750 on the projection plane of the axial direction of the mounting through hole 510, after the first head 120 extends into the limiting hole 820, no matter the base 500 is in the third state or the fourth state, the annular protrusion 132 can smoothly enter the mounting through hole 510 from the second port 512, specifically, when the base 500 is in the third state, as can be seen from the above embodiments, the annular protrusion 132 can smoothly enter the mounting through hole 510 from the second port 512, and when the base 500 is in the fourth state, the annular protrusion 132 will press against the inclined plane 750 in the process of moving into the mounting through hole 510, and due to the pressing of the inclined plane 750 by the annular protrusion 132, the base 500 will move relative to the assembling groove 810, and the base 500 is switched from the fourth state to the third state, so that the annular protrusion 132 can smoothly enter the mounting through hole 510 from the second port 512.

Further, the second locking member 30 further includes a spring member 910 and a pressing member 920, the spring member 910 is disposed between the base 500 and the mounting seat 800, and when no external force is applied, the elastic force of the spring member 910 acting on the base 500 can drive the base 500 to move from the third state to the fourth state. In this embodiment, the spring 910 can maintain the base 500 in the fourth state without an external force greater than the elastic force, so that the second head portion 130 can be prevented from being separated from the second locking member 30 when the base 500 is carelessly switched from the fourth state to the third state, thereby preventing danger. In addition, due to the arrangement of the inclined surface 750, in the process of inserting the second head portion 130 into the installation through hole 510 from the limiting hole 820, the base 500 can be converted into the third state from the fourth state by pressing the inclined surface 750, and after the annular protrusion 132 is installed in the installation through hole 510, the base 500 is converted into the fourth state from the third state under the action of the spring member 910. The locking between the second head 130 and the second locking member 30 can be achieved without manually moving the base 500 during the whole process of inserting the second head 130.

Further, the mounting seat 800 is formed with a guide through hole 830 communicating with the fitting groove 810, an axial direction of the guide through hole 830 is the same as a moving direction of the base 500 with respect to the fitting groove 810, one end of the pressing piece 920 disposed in the guide through hole 830 movably in the axial direction of the guide through hole 830 abuts on the base 500, and the other end of the pressing piece 920 extends out of the guide through hole 830 in a direction away from the fitting groove 810. When the base 500 needs to be moved, the state of the base 500 can be changed by moving the pressing member 920, so that when the second head portion 130 needs to be removed from the second locking member 30, the base 500 can be moved to the third state by moving the pressing member 920, and at this time, the second head portion 130 can be removed from the second locking member 30.

In a specific embodiment, the connecting device further includes a safety member 930, the mounting base 800 is provided with a guide sliding groove 840, the safety member 930 is slidably disposed in the guide sliding groove 840, the safety member 930 can slide to at least a first position and a second position, in the first position, at least a portion of the safety member 930 is located on a moving path of the base 500 or the bottom plate 600 or the limiting member 700 and does not extend into the mounting through hole 510, in the second position, the safety member 930 is not disposed on a moving path of the base 500 or the bottom plate 600 or the limiting member 700, and in the fourth state of the base 500 and in the first position of the safety member 930, the safety member 930 can limit the base 500 from the fourth state to the third state. In this embodiment, as long as the safety member 930 is located at the first position, the base 500 can be prevented from being changed from the fourth state to the third state by mistakenly touching the pressing member 920, so that the second locking member 30 and the connecting mechanism 10 in this embodiment can be more stably connected, and the safety performance can be further improved.

In order to further improve the stability of the connection, in a specific embodiment, the connection device further includes a limiting component, which can limit the limiting slide bar 200 from sliding from the first state to the second state. The limit slide bar 200 can be prevented from sliding from the first state to the second state by the limit component due to the mistaken touch and overcoming the elastic force of the elastic member 300. The stability of the connection between the first head 120 and the first locking member 20 is further improved.

In a more specific embodiment, the shaft body 110 is radially provided with a first pin hole, the main sliding rod 210 is provided with a second pin hole, and in the first state, the first pin hole and the second pin hole are aligned, and the limiting component comprises a pin (not shown), and the pin is detachably inserted into the first pin hole and the second pin hole. In this embodiment, in the first state, the first pin hole and the second pin hole are aligned, and the pin shaft can be inserted into the first pin hole and the second pin hole, so that the movement of the limiting slide bar 200 can be limited, and the first head 120 can be limited from being removed from the first locking member 20, thereby further improving the connection stability between the first head 120 and the first locking member 20.

Further, the safety seat comprises a limiting channel wall 850 for enclosing and forming part of the limiting hole 820, the limiting component is the limiting channel wall 850, when the second head 130 is locked with the second locking element 30, one end of the limiting channel wall 850 facing the second head 130 is located on a path along which the toggle part 230 moves when the first state is changed into the second state. Since the end of the limiting channel wall 850 facing the second head portion 130 is located on the path of the movement of the toggle portion 230 when the second head portion 130 is transformed into the second state when the second head portion 130 is locked with the second locking member 30, so that the limiting channel wall 850 can limit the movement of the toggle portion 230 and thus the first state of the limiting slide bar 200 is transformed into the second state, and thus the first head portion 120 and the first locking member 20 cannot be removed when the second head portion 130 and the second locking member 30 are not separated, in combination with the connection manner of the second head portion 130 and the second locking member 30 in the above embodiment, after the first head portion 120 and the second head portion 130 are respectively connected with the first locking member 20 and the second locking member 30, in order to separate the first locking member 20 from the first locking member 120, the second head portion 130 and the second locking member 30 must be separated first, and the safety member 930 needs to be moved to the first position, and then the pressing member 920 is moved so that the base 500 is located in the third state, then the second head portion 130 can be removed from the second locking member 30, and then the first head portion 120 and the second locking member 30 can be further separated from the first locking member 20 and the first locking member 30, so that the first locking member 10 can be connected with the first locking member 10 and the second locking member 10 can be connected rapidly and stably even in this embodiment.

In an embodiment, the shaft body 110 includes a first shaft portion 113 and a second shaft portion 114 integrally formed on the first shaft portion 113, an outer diameter of the first shaft portion 113 is larger than an outer diameter of the second shaft portion 114, a step 1134 is formed between the first shaft portion 113 and the second shaft portion 114, the sliding groove 111 is disposed on the second shaft portion 114, the connecting mechanism 10 further includes a casing 400, the casing 400 is disposed on the second shaft portion 114, a sliding hole 410 is disposed on the casing 400 at a position corresponding to the sliding groove 111, a length of the second shaft portion 114 is the same as a length of the casing 400, and one end of the casing 400 abuts against the step 1134. In this embodiment, most of the sliding groove 111 can be covered by the sleeve 400, so that the spring 910 and the limiting sliding rod 200 can be prevented from being released from the sliding groove 111. Secondly, since the shaft body 110 includes the first shaft portion 113 and the second shaft portion 114 integrally formed on the first shaft portion 113, and the sliding slot 111 is formed on the second shaft portion 114, the shaft body 110 can be manufactured by a simple machining method and the sliding slot 111 can be formed on the shaft body 110.

Further, the shaft portion 110, the first head portion 120 and the second head portion 130 are integrally formed. The connecting body 100 in this embodiment can be manufactured by simple machining, and has high strength and can bear a heavy object.

In a specific application scenario, the second locking member 30 is connected to the lamp, the first locking member 20 is connected to a pipe clamp, the pipe clamp can be fixed to the pipe, the first head portion 120 of the connecting mechanism 10 is connected to the first locking member 20, and the second head portion 130 of the connecting mechanism 10 is connected to the second locking member 30, so that the lamp can be fixed to the pipe.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A coupling mechanism, comprising:

2. The connecting mechanism according to claim 1, wherein the sliding groove includes a guide groove, a limiting groove, and a limiting through hole communicating the guide groove and the limiting groove, the guide groove, the limiting groove, and the limiting through hole all extend along an axial direction of the shaft body, one end of the guide groove penetrates through the shaft body along the axial direction of the shaft body, the guide groove and the limiting groove are respectively formed on two opposite sides of the shaft body, the limiting slide bar includes a main slide bar slidably disposed in the guide groove, a limiting rod integrally formed on one side of the main slide bar, and a toggle portion integrally formed on the other side of the main slide bar, the toggle portion extends out of the guide groove along a radial direction of the shaft body, the limiting rod passes through the limiting through hole and extends into the limiting groove, the elastic member is disposed in the limiting groove, one end of the elastic member abuts against the limiting rod, and the other end of the elastic member abuts against the shaft body.

3. The connecting mechanism according to claim 2, wherein the guide groove includes an upper groove portion and a lower groove portion, a bottom wall of the upper groove portion is recessed radially inward to form the lower groove portion, one end of the upper groove portion penetrates the shaft body portion in an axial direction of the shaft body portion, one end of the upper groove portion penetrating the shaft body portion is a first end, the main slide bar includes an upper slide bar portion disposed in the upper groove portion and a lower slide bar portion located in the lower groove portion, in the first state, an end portion of the lower slide bar portion facing the first end abuts against an inner wall of the lower groove portion facing one end of the first end, and the stopper bar abuts against an inner wall of the stopper through hole facing one end of the first end.

4. The connecting mechanism according to claim 3, wherein the lower groove portion has a length L1 extending in the axial direction of the shaft body portion, the lower slide rod portion has a length L2 extending in the axial direction of the shaft body portion, and the through hole has a length L3 extending in the axial direction of the shaft body portion, where L1-L2= L3.

5. The connecting mechanism according to claim 3, wherein a guide hole communicating with the lower groove portion is formed in the first head portion or the second head portion facing the first end in an axial direction of the shaft body portion, a guide rod portion is integrally formed on the upper slide rod portion or the lower slide rod portion, and the guide rod portion is slidably inserted into the guide hole in the axial direction of the shaft body portion.

6. The connecting mechanism according to claim 2, wherein an assembling rod portion is integrally formed on the limiting rod, the assembling rod portion is arranged in the limiting groove, the elastic member is a spring, and the spring is sleeved on the assembling rod portion.

7. The coupling mechanism according to claim 2, further comprising a limiting assembly capable of limiting the sliding movement of the limiting slide bar from the first state to the second state.

8. The connecting mechanism according to claim 7, wherein the limiting slide bar includes a toggle portion extending out of the sliding groove along a radial direction of the shaft body portion, the limiting component is the toggle portion, an end of the sliding groove penetrating through the shaft body portion is a first end, and when the first head portion or the second head portion far away from the first end is locked with the external locking member, an end of the external locking member facing the toggle portion is located on a path along which the limiting slide bar moves from the first state to the second state.

9. The connecting mechanism according to claim 7, wherein the shaft body has a first pin hole formed along a radial direction thereof, the main sliding rod has a second pin hole formed thereon, the first pin hole and the second pin hole are aligned in the first state, and the limiting assembly includes a pin shaft detachably inserted into the first pin hole and the second pin hole.

10. The connecting mechanism according to claim 7, wherein the shaft body has a first pin hole extending radially therethrough, the position-limiting slide rod includes a toggle portion extending out of the sliding groove along the radial direction of the shaft body, the position-limiting assembly includes a pin shaft detachably disposed in the first pin hole, one end of the pin shaft extends out of the first pin hole, and a portion extending out of the first pin hole is located on a path along which the position-limiting slide rod moves from the first state to the second state.

11. The coupling mechanism of claim 1, wherein the shaft body portion, the first head portion, and the second head portion are integrally formed.

12. The connecting mechanism according to claim 1, wherein the first head portion includes a first central shaft having the same axial direction as the shaft body portion, and a first protruding portion and a second protruding portion protruding outward in a radial direction of the first central shaft, the first protruding portion and the second protruding portion are disposed at intervals around a central axis of the first central shaft, and the first protruding portion and the second protruding portion are symmetrically disposed, the first protruding portion and the second protruding portion are disposed at intervals with the shaft body portion in the axial direction of the shaft body portion, an interval between the first protruding portion and the second protruding portion is X1, a portion of one end of the limiting slide bar exceeding the sliding groove overlaps with the first head portion in the radial direction of the shaft body portion, a length of a portion of the limiting slide bar exceeding the sliding groove does not exceed X1, and a portion of the limiting slide bar exceeding the sliding groove overlaps with both the first protruding portion and the second protruding portion in the axial direction of the first central shaft.

13. The coupling mechanism according to claim 1, wherein the second head portion includes a second central axis that is the same as the axial direction of the shaft portion, and an annular projection that is formed to project radially outward of the second central axis, the annular projection being spaced apart from the shaft portion in the axial direction of the shaft portion.

14. The connecting mechanism according to claim 1, wherein the shaft body portion includes a first shaft portion and a second shaft portion integrally formed on the first shaft portion, an outer diameter of the first shaft portion is larger than an outer diameter of the second shaft portion, a step is formed between the first shaft portion and the second shaft portion, the sliding groove is formed in the second shaft portion, the connecting mechanism further includes a casing, the casing is sleeved on the second shaft portion, a sliding hole is formed in a position of the casing corresponding to the sliding groove, a length of the second shaft portion is the same as a length of the casing, and one end of the casing abuts against the step.