CN218932940U - Railing, railing base and movable railing assembly - Google Patents

Abstract

The utility model belongs to the technical field of railings, and particularly relates to a railing, a railing base and a movable railing assembly. The movable railing assembly comprises a railing and a railing base; the railing comprises a rod body, a first limiting mechanism, a second limiting mechanism and a limiting installation part; the railing base comprises an installation cavity, a clamping mechanism and an imbedding groove, wherein the limiting installation part is matched with the installation cavity, the installation cavity is used for limiting the movement of the railing in the radial direction through the limiting installation part, the installation cavity is used for limiting the downward movement of the second limiting mechanism, the first limiting mechanism can be inserted into the installation cavity through the imbedding groove, the first limiting mechanism is moved to one side of the clamping mechanism through the imbedding groove, and the first limiting machine is matched with the clamping mechanism. The railing and the railing base are mutually separated, so that the railing is convenient to transport, use and install, the railing can be installed on the railing base when in use, the railing is convenient to install, the base can be prevented from being buried in a concrete base in advance, and the railing base is wider in application range.

Description

Railing, railing base and movable railing assembly

Technical Field

The utility model belongs to the technical field of railings, and particularly relates to a railing, a railing base and a movable railing assembly.

Background

The movable railing plays a role in separation and guiding in use, so that the boundary of a segmented area is clear, and the movable railing is a safety facility and a surrounding and blocking facility, for example, when the movable railing is applied to a separation strip, people can be separated in a regional manner to meet the needs of practical application. Therefore, the movable railing has wide application in the aspects of safety protection and enclosure of airports, banks, post offices, hotels, institutions, enterprises and the like. However, the bottom of the rod body and the base of the existing movable railing are connected and matched or integrally formed, or the base of the movable railing in the prior art is buried in a concrete base layer in advance, and the rod body part is movable, for example, CN201721304105.1 discloses a novel railing combination fixing structure which comprises a vertical rod, a first anchoring steel bar, a second anchoring steel bar, a first base, a second base, a first cross beam and a second cross beam. The first anchoring bars are embedded in the concrete base layer and are arranged along a straight line; the second anchor bars are also a plurality of, and the quantity is equal with the quantity of first anchor bars, and these second anchor bars are pre-buried in the concrete basic unit and along sharp range. Through analysis, if the bottom of the rod body is connected and matched with the base or integrally formed, the whole volume of the movable railing is larger, and inconvenience is brought to carrying, transferring, using and installing; if the base is pre-buried in a concrete base, this results in a limited range of use for the mobile rail.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a railing, a railing base and a movable railing assembly. The railing and the railing base are mutually separated, so that the railing is convenient to transport, use and install, the railing can be installed on the railing base when in use, the railing is convenient to install, the base can be prevented from being buried in a concrete base in advance, and the railing base is wider in application range.

The utility model provides a railing, which comprises a rod body, a first limiting mechanism connected with the lower end of the rod body, and a second limiting mechanism positioned above the first limiting mechanism and connected with the lower end of the rod body, wherein the second limiting mechanism and the first limiting mechanism are both protruded outwards compared with the outer side wall of the rod body, the second limiting mechanism is protruded outwards compared with the first limiting mechanism, and a limiting installation part is formed at the lower end of the railing.

Preferably, the railing further comprises an elastic component, one end of the elastic component is connected with the second limiting mechanism, the second limiting mechanism is in sliding connection with the lower end of the rod body, when the second limiting mechanism is close to or far away from the first limiting mechanism, the elastic component is driven to stretch or compress, and the distance between the second limiting mechanism and the first limiting mechanism is prolonged or shortened.

Preferably, the rod body is provided with a sliding limit groove along the axial direction, the second limit mechanism comprises a guide bolt and a sliding limit block which are in sliding connection with the sliding limit groove, one end of the guide bolt is arranged in the rod body, the other end of the guide bolt extends out of the outer side wall of the rod body along the sliding limit groove and is connected with the sliding limit block, the sliding limit block can be close to or far away from the first limit mechanism, the elastic part is arranged in the railing, and one end of the elastic part is connected with the guide bolt while the other end is connected with the first limit mechanism; or alternatively

The rod body is provided with a mounting jack, the second limiting mechanism comprises a guide bolt and a sliding limiting block sleeved on the rod body, a guide sliding groove is formed in the inner wall of the sliding limiting block along the axial direction, an elastic component is arranged in the guide sliding groove, the guide bolt is inserted into the rod body through the mounting jack, two ends of the guide bolt are slidably clamped in the guide sliding groove, and the guide bolt stretches or compresses when moving up and down in the guide sliding groove.

The railing base is provided with a mounting cavity, the inner side wall of the mounting cavity is provided with an imbedding groove, the imbedding groove is arranged in the axial direction of the mounting cavity, one side of the imbedding groove is provided with a clamping mechanism, and the imbedding groove is connected with the clamping mechanism.

Preferably, the mounting cavity penetrates through the upper surface and the lower surface of the railing base along the axial direction, the notch of the placement groove is communicated with the mounting cavity, the placement groove is located at the periphery of the mounting cavity, and the lower end of the placement groove penetrates through the lower surface of the railing base.

Preferably, the clamping mechanism is a clamping groove, the clamping groove is a groove formed in the lower surface of the railing base, one end of the clamping groove is communicated with the mounting cavity, the other end of the clamping groove extends along the radial direction of the mounting cavity from inside to outside, and the notch of the clamping groove is arranged downwards.

Another aspect of the present utility model provides a mobile balustrade assembly comprising the above-described balustrade, and the above-described balustrade base; the railing comprises a rod body, a first limiting mechanism, a second limiting mechanism and a limiting installation part; the railing base includes installation cavity, joint mechanism and inserts the groove, spacing installation department with the installation cavity is matched with, the installation cavity passes through spacing installation department is right railing radial direction removes spacingly, just the installation cavity carries out spacingly to second stop gear downstream, first stop gear can by insert into the groove insert in the installation cavity, first stop gear passes through it removes to one side to put into the groove joint mechanism, first stop machine with joint mechanism cooperatees.

Preferably, the lower end of the second limiting mechanism forms the limiting installation part, the periphery of the limiting installation part is in butt joint with the inner wall of the installation cavity, the upper end of the second limiting mechanism forms the limiting end, the installation cavity is right the limiting end moves downwards to carry out limiting, the railing further comprises an elastic component connected with the second limiting mechanism, the installation cavity penetrates through the upper surface and the lower surface of the railing base along the axial direction, the lower end of the insertion groove penetrates through the lower surface of the railing base, the first limiting mechanism can penetrate through the lower surface of the railing base from the installation cavity through the insertion groove, the first limiting mechanism rotates, and when the first limiting mechanism is dislocated with the insertion groove, the first limiting mechanism can be in butt joint with the lower surface of the railing base, and the elastic component is stretched.

Preferably, the clamping mechanism is a clamping groove which can be matched with the first limiting mechanism, the clamping groove is a groove formed in the lower surface of the railing base, one end of the clamping groove is communicated with the mounting cavity, the first limiting mechanism can be clamped in the clamping groove, and the clamping groove is limited to the first limiting mechanism in circumferential rotation.

Preferably, the rod body is provided with a sliding limit groove, the second limit mechanism comprises a guide bolt and a sliding limit block connected with the guide bolt, the guide bolt is in sliding connection with the sliding limit groove, the upper end and the lower end of the elastic part are respectively provided with an upper buckle and a lower buckle, the upper end of the elastic part is connected with the guide bolt through the upper buckle, and the lower end of the elastic part is connected with the first limit mechanism through the lower buckle; or alternatively

The second limiting mechanism comprises a guide bolt, a sliding limiting block and a plug, the elastic component is arranged in a guide sliding groove of the sliding limiting block, the guide bolt is inserted on the rod body through the mounting jack, and two ends of the guide bolt are slidably clamped in the guide sliding groove; the lower end of the guide sliding groove penetrates through the sliding limiting block, the elastic component can be inserted into the guide sliding groove from the lower end of the guide sliding groove, and the plug is matched with the lower end of the guide sliding groove.

Drawings

The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular description of preferred embodiments of the utility model, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intentionally drawn to scale on actual size or the like, with emphasis on illustrating the principles of the utility model.

FIG. 1 is a schematic view of a movable rail assembly according to a first embodiment;

FIG. 2 is a cross-sectional view of the mobile rail assembly provided in the first embodiment;

FIG. 3 is an assembled view of the first stop mechanism, the second stop mechanism, the resilient member and the railing base provided in the first embodiment;

FIG. 4 is a cross-sectional view of the first stop mechanism, the second stop mechanism, the resilient member, and the rail base assembly provided in the first embodiment;

fig. 5 is a schematic structural view of the balustrade according to the first embodiment;

FIG. 6 is an enlarged view of a portion of FIG. 5;

fig. 7 is a schematic diagram of the structure of fig. 6 with the sliding stopper omitted;

fig. 8 is a schematic structural view of a sliding stopper according to the first embodiment;

fig. 9 is a schematic structural view of a railing base provided in the first embodiment;

FIG. 10 is a schematic view of another view of the railing base according to the first embodiment;

FIG. 11 is a view of a second embodiment of a movable rail assembly;

FIG. 12 is a cross-sectional view of the mobile rail assembly provided by the second embodiment;

fig. 13 is a schematic structural view of a railing provided in the second embodiment;

fig. 14 is a cross-sectional view BB of fig. 12.

The attached drawings are identified: a balustrade 10, a balustrade base 20, a moving balustrade assembly 30; the rod body 100, the first limiting mechanism 101, the second limiting mechanism 102, the elastic component 103, the sliding limiting groove 104, the sliding limiting block 105, the limiting mounting part 106, the guide bolt 107, the mounting jack 108, the guide sliding groove 109, the plug 110 and the second mounting jack 111; base body 200, installation cavity 201, put into groove 202, joint mechanism 203.

Detailed Description

In order that the utility model may be understood more fully, the utility model will be described with reference to the accompanying drawings.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes 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. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the first embodiment, the movable rail assembly 30 includes a rail 10 and a rail base 20, the rail 10 includes a rod body 100, a first limiting mechanism 101 connected to the lower end of the rod body 100, and a second limiting mechanism 102 located above the first limiting mechanism 101 and connected to the lower end of the rod body 100, the second limiting mechanism 102 and the first limiting mechanism 101 each protrude outwards compared with the outer side wall of the rod body 100, and the second limiting mechanism 102 protrudes outwards compared with the first limiting mechanism 101, and a limiting installation part 106 is formed at the lower end of the rail 10; the railing base 20 is provided with a mounting cavity 201, the inner side wall of the mounting cavity 201 is provided with an imbedding groove 202, the imbedding groove 202 is arranged in the axial direction of the mounting cavity 201, one side of the imbedding groove 202 is provided with a clamping mechanism 203, and the imbedding groove 202 is connected with the clamping mechanism 203. When the movable rail assembly is used, the limiting mounting part 106 is matched with the mounting cavity 201, the mounting cavity 201 limits the movement of the rail 10 in the radial direction through the limiting mounting part 106, the mounting cavity 201 limits the downward movement of the second limiting mechanism 102, the first limiting mechanism 101 can be inserted into the mounting cavity 201 through the insertion groove 202, the first limiting mechanism 101 moves to the clamping mechanism 203 at one side through the insertion groove 202, and the first limiting mechanism is matched with the clamping mechanism 203, so that the rail 10 is fixedly mounted on the rail base 20 to form the movable rail assembly 30.

In a preferred embodiment, the railing 10 further includes an elastic member 103, one end of the elastic member 103 is connected with the second limiting mechanism 102, the second limiting mechanism 102 is slidably connected with the lower end of the rod body 100, and when the second limiting mechanism 102 approaches to or departs from the first limiting mechanism 101, the elastic member 103 is driven to stretch or compress, and the distance between the second limiting mechanism 102 and the first limiting mechanism 101 is lengthened or shortened. The lower extreme of second stop gear 102 forms spacing installation department 106, the periphery of spacing installation department 106 and the inner wall butt of installation cavity 201, the upper end of second stop gear 102 forms the spacing end, installation cavity 201 moves down the spacing end and carries out spacingly, installation cavity 201 runs through railing base 20 upper and lower surface along the axial direction, put into the lower extreme of groove 202 and run through railing base 20 lower surface, first stop gear 101 accessible is put into groove 202 and is passed railing base 20 lower surface by installation cavity 201, then rotatory first stop gear 101, and when making first stop gear 101 misplaced with putting into groove 202, first stop gear 101 can with railing base 20 lower surface butt, and elastomeric element 103 is stretched. Through the arrangement, the first limiting mechanism 101, the second limiting mechanism 102 and the elastic component 103 are mutually matched to form a telescopic clamping area, when the first limiting mechanism 101 is rotatably abutted against the lower surface of the railing base 20, the first limiting mechanism 101 and the second limiting mechanism 102 are respectively clamped on the upper surface and the lower surface of the railing base 20, and the elastic component 103 provides acting force for clamping, so that the railing 10 is fixed on the railing base 20, at the moment, the entity part between the upper surface and the lower surface of the base body 200 is equivalent to the clamping mechanism 203, and the first limiting mechanism 101 and the second limiting mechanism 102 can be blocked from moving up and down, so that the railing base is more convenient to fix. Further, the clamping mechanism 203 is a clamping groove which can be matched with the first limiting mechanism 101, the clamping groove is a groove formed in the lower surface of the railing base 20, and one end of the clamping groove is communicated with the mounting cavity 201. When the railing 10 and the railing base 20 are fixedly mounted more firmly, the first limiting mechanism 101 is prevented from sliding out of the imbedding groove 202 in the use process. In some embodiments, the clamping groove may be disposed on the inner wall of the installation cavity 201, and disposed along the circumferential direction of the inner wall of the installation cavity 201, one end of the clamping groove is connected with the placement groove 202, the clamping groove and the placement groove 202 form an L-shaped groove, the first limiting mechanism 101 moves down to one end of the clamping groove along the axial direction along the placement groove 202, then rotates by a certain angle into the clamping groove, and under the action of the elastic component 103, the first limiting mechanism 101 abuts against the upper side wall of the clamping groove, so that the first limiting mechanism 101 and the second limiting mechanism 102 are fixed on the railing base 20.

In a preferred embodiment, the rod body 100 is provided with a sliding limiting groove 104 along an axial direction, the second limiting mechanism 102 includes a guide pin 107 and a sliding limiting block 105 slidably connected with the sliding limiting groove 104, one end of the guide pin 107 is disposed in the rod body 100, the other end extends out of an outer side wall of the rod body 100 along the sliding limiting groove 104 and is connected with the sliding limiting block 105, the sliding limiting block 105 can be close to or far away from the first limiting mechanism 101, the rod body 100 is generally tubular, the elastic component 103 is disposed in the railing 10, one end of the elastic component 103 is connected with the guide pin 107, and the other end is connected with the first limiting mechanism 101. Further, the elastic component 103 is a spring, the upper end and the lower end of the elastic component 103 are respectively provided with an upper buckle and a lower buckle, the upper end of the elastic component 103 is connected with the guide bolt 107 through the upper buckle, the lower end is connected with the first limiting mechanism 101 through the lower buckle, and the upper buckle and the lower buckle are arranged to enable the installation to be convenient and simplify the structure. The number of the placement grooves 202 is four, two adjacent placement grooves 202 are spaced by 90 degrees, the guide pin 107 and the first limiting mechanism 101 are generally cross-shaped metal pieces, and the radius of the first limiting mechanism 101 is larger than that of the installation cavity 201 and smaller than or equal to the distance between the two opposite placement grooves 202.

The second embodiment differs from the first embodiment mainly in that: the rod body 100 is not provided with a sliding limit groove 104, but provided with a mounting jack 108; the sliding limiting block 105 is provided with a guide sliding groove 109; the guide pin 107 of the first embodiment is cross-shaped, whereas the second embodiment forms the guide pin 107 from a single, straight piece of metal. In the second embodiment, the rod body 100 is provided with the mounting jack 108, the second limiting mechanism 102 comprises the guide plug 107 and the sliding limiting block 105 sleeved on the rod body 100, the inner wall of the sliding limiting block 105 is provided with the guide sliding groove 109 along the axial direction, the elastic component 103 is arranged in the guide sliding groove 109, the guide plug 107 is inserted on the rod body 100 through the mounting jack 108, two ends of the guide plug 107 are slidably clamped in the guide sliding groove 109, and when the guide plug 107 moves up and down along the guide sliding groove 109, the elastic component 103 is stretched or compressed. When the base body 200 is used, because the installation cavity 201 moves downwards to the sliding limiting block 105 by limiting, when the rod body 100 moves downwards, the guide pin 107 and the guide sliding groove 109 are driven to move relatively, the guide pin 107 compresses the elastic component 103 downwards, then the rod body 100 is rotated to enable the first limiting mechanism 101 to rotate and be clamped into the clamping mechanism 203, and because the compressed elastic component 103 has restoring force, the elastic component 103 has upward acting force on the guide pin 107 and the rod body 100, so that the first limiting mechanism 101 is also subjected to upward pulling force, and the first limiting mechanism 101 and the sliding limiting block 105 can clamp the base body 200. Further, a second installation jack 111 matched with the installation jack 108 is also formed on the sliding limiting block 105, the second installation jack 111 penetrates through the sliding limiting block 105 along the radial direction, when the linear guide bolt 107 is installed on the rod body 100, the guide bolt 107 penetrates through the second installation jack 111 to be inserted into the installation jack 108 through the second installation jack 111 in alignment with the installation jack 108, and the guide bolt 107 is installed and fixed relative to the rod body 100. Further, the number of the insertion grooves 202 may be three, and two adjacent insertion grooves 202 may be spaced apart by 120 °, and the first limiting mechanism 101 may be formed by connecting three metal members arranged concentrically, the three metal members being arranged in the radial direction and the adjacent metal members being spaced apart by 120 °.

In a preferred embodiment, the rod body 1 further includes a plug 110, the lower end of the guide sliding groove 109 penetrates the sliding limiting block 105, the elastic component 103 can be inserted into the guide sliding groove 109 from the lower end of the guide sliding groove 109, the elastic component 103 can be conveniently placed into the guide sliding groove 109 through the design of the plug 110, and when in use, the plug 110 is matched with the lower end of the guide sliding groove 109, so that the elastic component cannot slide out from the guide sliding groove 109.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to the terms "preferred embodiment," "further embodiment," "other embodiments," or "specific examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. The railing is characterized by comprising a rod body, a first limiting mechanism connected with the lower end of the rod body, and a second limiting mechanism located above the first limiting mechanism and connected with the lower end of the rod body, wherein the second limiting mechanism and the first limiting mechanism are both more than the outer side wall of the rod body to protrude outwards, the second limiting mechanism is more than the first limiting mechanism to protrude outwards, and a limiting installation part is further formed at the lower end of the railing.

2. The balustrade of claim 1 further comprising an elastic member, wherein one end of the elastic member is connected to the second limiting mechanism, the second limiting mechanism is slidably connected to the lower end of the rod body, and when the second limiting mechanism approaches or leaves the first limiting mechanism, the elastic member is driven to stretch or compress, and a distance between the second limiting mechanism and the first limiting mechanism is lengthened or shortened.

3. The railing of claim 2, wherein the rod body is provided with a sliding limit groove along the axial direction, the second limit mechanism comprises a guide bolt and a sliding limit block which are in sliding connection with the sliding limit groove, one end of the guide bolt is arranged in the rod body, the other end of the guide bolt extends out of the outer side wall of the rod body along the sliding limit groove and is connected with the sliding limit block, the sliding limit block can be close to or far away from the first limit mechanism, the elastic component is arranged in the railing, and one end of the elastic component is connected with the guide bolt, and the other end of the elastic component is connected with the first limit mechanism; or alternatively

The rod body is provided with a mounting jack, the second limiting mechanism comprises a guide bolt and a sliding limiting block sleeved on the rod body, a guide sliding groove is formed in the inner wall of the sliding limiting block along the axial direction, an elastic component is arranged in the guide sliding groove, the guide bolt is inserted into the rod body through the mounting jack, two ends of the guide bolt are slidably clamped in the guide sliding groove, and the guide bolt stretches or compresses when moving up and down in the guide sliding groove.

4. The railing base is characterized in that the railing base is provided with an installation cavity, the inner side wall of the installation cavity is provided with an insertion groove, the insertion groove is formed in the axial direction of the installation cavity, one side of the insertion groove is provided with a clamping mechanism, and the insertion groove is connected with the clamping mechanism.

5. The balustrade base of claim 4 wherein the mounting cavity extends through the top and bottom surfaces of the balustrade base in an axial direction, the slot opening of the insertion slot communicates with the mounting cavity, the insertion slot is located at the periphery of the mounting cavity, and the bottom end of the insertion slot extends through the bottom surface of the balustrade base.

6. The railing base according to claim 5, wherein the clamping mechanism is a clamping groove, the clamping groove is a groove formed in the lower surface of the railing base, one end of the clamping groove is communicated with the mounting cavity, the other end of the clamping groove extends along the radial direction of the mounting cavity from inside to outside, and a notch of the clamping groove is arranged downwards.

7. A mobile balustrade assembly comprising a balustrade as claimed in any one of claims 1 to 3 and a balustrade base as claimed in any one of claims 4 to 6; the railing comprises a rod body, a first limiting mechanism, a second limiting mechanism and a limiting installation part; the railing base includes installation cavity, joint mechanism and inserts the groove, spacing installation department with the installation cavity is matched with, the installation cavity passes through spacing installation department is right railing radial direction removes spacingly, just the installation cavity carries out spacingly to second stop gear downstream, first stop gear can by insert into the groove insert in the installation cavity, first stop gear passes through it removes to one side to put into the groove joint mechanism, first stop machine with joint mechanism cooperatees.

8. The movable rail assembly of claim 7, wherein the lower end of the second limiting mechanism forms the limiting mounting portion, the outer periphery of the limiting mounting portion is abutted against the inner wall of the mounting cavity, the upper end of the second limiting mechanism forms the limiting end, the mounting cavity limits the downward movement of the limiting end, the rail further comprises an elastic component connected with the second limiting mechanism, the mounting cavity penetrates through the upper surface and the lower surface of the rail base in the axial direction, the lower end of the placement groove penetrates through the lower surface of the rail base, the first limiting mechanism can penetrate through the lower surface of the rail base from the mounting cavity through the placement groove, the first limiting mechanism is rotated, and when the first limiting mechanism is dislocated with the placement groove, the first limiting mechanism can be abutted against the lower surface of the rail base, and the elastic component is stretched.

9. The movable rail assembly of claim 8, wherein the clamping mechanism is a clamping groove matched with the first limiting mechanism, the clamping groove is a groove formed in the lower surface of the rail base, one end of the clamping groove is communicated with the mounting cavity, the first limiting mechanism can be clamped in the clamping groove, and the clamping groove limits the circumferential rotation of the first limiting mechanism.

10. The movable rail assembly according to claim 9, wherein the rod body is provided with a sliding limit groove, the second limit mechanism comprises a guide bolt and a sliding limit block connected with the guide bolt, the guide bolt is in sliding connection with the sliding limit groove, an upper buckle and a lower buckle are respectively arranged at the upper end and the lower end of the elastic part, the upper end of the elastic part is connected with the guide bolt through the upper buckle, and the lower end of the elastic part is connected with the first limit mechanism through the lower buckle; or alternatively

The second limiting mechanism comprises a guide bolt, a sliding limiting block and a plug, the elastic component is arranged in a guide sliding groove of the sliding limiting block, the guide bolt is inserted on the rod body through the mounting jack, and two ends of the guide bolt are slidably clamped in the guide sliding groove; the lower end of the guide sliding groove penetrates through the sliding limiting block, the elastic component can be inserted into the guide sliding groove from the lower end of the guide sliding groove, and the plug is matched with the lower end of the guide sliding groove.

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