阅读说明：本技术 一种用于电线电缆的固定架 (Fixing frame for wires and cables ) 是由 陈雷 马明海 张子健 于 2021-09-02 设计创作，主要内容包括：本发明公开了一种用于电线电缆的固定架,包括支撑型立柱,所述支撑型立柱上下贯穿设置有滑动型轨道槽,所述滑动型轨道槽内活动插入有支撑横梁,所述支撑横梁上端面的两侧均固定焊接有固定台,所述固定台的中间处贯穿设置有圆固定槽,所述圆固定槽内部的两侧均贯穿设置有插装方槽,所述插装方槽内安装有插装板。本发明通过在连接斜杠中间处活动设置的连接长轴的旋转活动性,使得活动连杆另一点的连接块A向上旋转活动,从而带动连接型活动块、弯曲型弹簧、连接端块和限位插装块向上移动,实现了限位插装块从限位圆柱槽内快速脱出的作用。(The invention discloses a fixing frame for wires and cables, which comprises a supporting type upright post, wherein a sliding type track groove is formed in the supporting type upright post in a penetrating mode from top to bottom, a supporting cross beam is movably inserted into the sliding type track groove, fixing tables are fixedly welded on two sides of the upper end surface of the supporting cross beam, a round fixing groove is formed in the middle of each fixing table in a penetrating mode, inserting square grooves are formed in two sides of the inner portion of each round fixing groove in a penetrating mode, and inserting plates are installed in the inserting square grooves. According to the invention, the connecting block A at the other point of the movable connecting rod is enabled to rotate upwards through the rotation activity of the connecting long shaft movably arranged in the middle of the connecting oblique rod, so that the connecting movable block, the bent spring, the connecting end block and the limiting insertion block are driven to move upwards, and the effect of quickly releasing the limiting insertion block from the limiting cylindrical groove is realized.)

1. A mount for wire and cable, including support type stand (1), its characterized in that: a sliding type track groove (2) is arranged in the supporting type upright post (1) in a penetrating manner, a supporting cross beam (5) is movably inserted and installed in the sliding type track groove (2), fixed platforms (6) are fixedly welded on two sides of the upper end surface of the supporting cross beam (5), a round fixed groove (17) is arranged in the middle of each fixed platform (6) in a penetrating manner, inserting square grooves (15) are arranged in the two sides of the inner part of each round fixed groove (17) in a penetrating manner, inserting plates (10) are inserted and installed in the inserting square grooves (15), a fixed ring plate (9) is fixedly welded and connected between the two inserting plates (10), movable cylindrical grooves (11) are arranged in the front side and the rear side of the upper end surface of each fixed platform (6) in a penetrating manner, movable columns (7) are movably installed in the movable cylindrical grooves (11), and movable cavities (12) are fixedly arranged at the lower ends of the movable cylindrical grooves (11), a mounting cavity (14) is fixedly arranged inside the lower end of the movable cavity (12), an extension spring (13) is fixedly arranged inside the movable cavity (12), a fixed resisting plate (16) is fixedly welded in the inner space of the installation cavity (14), movable connecting rods (8) are movably arranged at two sides in the installation cavity (14), one end of the movable connecting rod (8) is movably provided with a connecting type movable block (19), the lower end of the connecting type movable block (19) is fixedly welded with a bending type spring (21), the lower end of the bending spring (21) is fixedly welded with a connecting end block (22), the lower end of the connecting end block (22) is fixedly welded with a limiting cylindrical groove (23), both sides of the upper end surface of the inserting plate (10) are fixedly provided with a limiting cylindrical groove (23), the limiting cylindrical groove (23) penetrates through the fixing table (6) and extends into the mounting cavity (14);

the front and back surface align to grid of support type stand (1) runs through and is provided with eight installation type jacks (3), the front side activity of installation type jack (3) is provided with metal end cap (4), the rear side fixed welding of metal end cap (4) has cartridge type cylindric lock (25), cartridge type cylindric lock (25) insert in installation type jack (3), the fixed type slot (26) that clamps that is provided with in rear side of installation type jack (3), fixed cap (28) have been clamped on the surface of cartridge type cylindric lock (25) rear end face, the equal fixed welding in upper and lower both sides of fixed cap (28) front end has elasticity strip (27), one side fixed welding of elasticity strip (27) has spacing fixture block (29).

2. A holder for electrical wires and cables according to claim 1, wherein: the movable column (7) comprises a pressing type column (701), a movable circular abutting plate (702), a movable abutting column (703) and a connecting end strip (704), wherein the movable circular abutting plate (702) is fixedly welded at the lower end of the pressing type column (701), the movable abutting column (703) is fixedly welded in the middle of the lower end of the movable circular abutting plate (702), and the connecting end strip (704) is fixedly welded at the lower end of the movable abutting column (703).

3. A holder for electrical wires and cables according to claim 2, wherein: the movable cavity (12) is arranged inside the fixed abutting plate (16), the lower end of the movable circular abutting plate (702) is fixedly welded with the lower end inside the movable cavity (12) through an extension spring (13), the movable circular abutting plate (702) is fixedly welded with the connecting end bar (704) through a movable abutting column (703), and the periphery of the upper end of the movable circular abutting plate (702) is movably connected with the upper end inside the movable cavity (12) in a matched manner.

4. A holder for electrical wires and cables according to claim 2, wherein: the movable connecting rod (8) comprises a connecting block A (801), a connecting slash (802), a connecting block B (803) and a movable square groove (804), wherein the connecting slash (802) is fixedly welded on one side of the connecting block A (801), the connecting block B (803) is fixedly welded on one side of the connecting slash (802), and the movable square groove (804) is arranged on the front side and the rear side of the connecting block A (801) in a penetrating mode.

5. A holder for electric wires and cables according to claim 4, wherein: both ends of connecting end strip (704) all fixed welding have activity minor axis A (18), both sides run through around connecting block B (803) one end and are provided with the activity hole, activity minor axis A (18) are located the activity hole on connecting block B (803).

6. A holder for electric wires and cables according to claim 4, wherein: the upper end of the connecting type movable block (19) is fixedly welded with a movable short shaft B (20) in a front-back penetrating mode, and the movable short shaft B (20) is movably located in a movable square groove (804) on the connecting block A (801).

7. A holder for electric wires and cables according to claim 4, wherein: the middle of the connecting oblique rod (802) is provided with a connecting long shaft in a penetrating and movable mode, the two sides of the connecting long shaft are fixedly connected with the inner wall of the mounting cavity (14) through welding, and the movable square groove (804) is fixedly connected with the connecting block B (803) through the connecting oblique rod (802) in a welding mode.

8. A holder for electrical wires and cables according to claim 1, wherein: the connecting type movable block (19) and the connecting end block (22) are fixedly welded and connected through a bent spring (21), and a limiting insertion block (24) is arranged in the limiting cylindrical groove (23).

9. A holder for electrical wires and cables according to claim 1, wherein: spacing fixture block (29) installation is located and clamps type circular slot (26), the fixed annular that clamps that is provided with in cartridge type cylindric lock (25) rear end, through elasticity strip (27) fixed weld connection between spacing fixture block (29) and fixed cap (28), the one end fixed clamping of spacing fixture block (29) is located the annular that clamps on cartridge type cylindric lock (25).

10. A holder for electrical wires and cables according to claim 1, wherein: the fixed ring plate (9) is fixedly connected with the plug-in plate (10) through welding, and the fixed ring plate (9) is movably inserted into the circular fixing groove (17).

Technical Field

The invention relates to the technical field of wire and cable fixing frames, in particular to a fixing frame for wires and cables.

Background

With the rapid development of social economy, cables are laid in cable ducts and tunnels and are generally fixed by using fixing frames, and the commonly used fixing frames comprise angle steel fixing frames and assembly type fixing frames. The angle steel fixing frame used in the cable trench comprises a glass fiber reinforced plastic cable fixing frame, a composite cable fixing frame, a pre-embedded cable fixing frame, a screw type cable fixing frame, a combined type cable fixing frame and the like. The composite cable fixing frame is high in strength, good in toughness, corrosion-resistant, high in insulating property and good in flame retardance.

The fixing of the existing fixing frame for the electric wires and the electric cables is mostly in bolt connection, and the connecting structure ensures that workers need to operate for a long time beside the fixing frame, so that the electric cables cannot be quickly disassembled from the fixing frame; the fixed structure on the fixing frame enables the supporting cross beam to be incapable of moving up and down, so that the height of the cable cannot be adjusted.

Disclosure of Invention

The invention aims to provide a fixing frame for electric wires and cables, which aims to solve the problem that the fixing frame for electric wires and cables in the background technology is mostly in bolt connection with the cables, and the connecting structure ensures that workers need to operate for a long time beside the fixing frame, so that the cables cannot be quickly disassembled from the fixing frame; the fixed structure on the fixing frame enables the supporting beam to move up and down, so that the height of the cable cannot be adjusted.

In order to achieve the purpose, the invention provides the following technical scheme: a fixing frame for wires and cables comprises a supporting type upright post, wherein a sliding type track groove is arranged in the supporting type upright post in a penetrating mode, a supporting cross beam is movably inserted in the sliding type track groove, fixing tables are fixedly welded on two sides of the upper end face of the supporting cross beam, a round fixing groove is arranged in the middle of each fixing table in a penetrating mode, inserting square grooves are arranged on two sides of the inside of each round fixing groove in a penetrating mode, inserting plates are installed in the inserting square grooves, a fixing ring plate is fixedly welded between the two inserting plates, movable cylindrical grooves are arranged on the front side and the rear side of the upper end face of each fixing table in a penetrating mode, movable columns are movably installed in the movable cylindrical grooves, a movable cavity is fixedly arranged at the lower end of each movable cylindrical groove, an installation cavity is fixedly arranged in the inner portion of the lower end of each movable cavity, a tension spring is fixedly arranged in the inner portion of each movable cavity, and a fixing abutting plate is fixedly welded in the inner space of each installation cavity, the mounting structure comprises a mounting cavity, a connecting type movable block, a connecting type spring, a connecting end block, a limiting cylindrical groove, a fixing table and a limiting cylindrical groove, wherein the two sides inside the mounting cavity are movably provided with movable connecting rods, one end of each movable connecting rod is movably provided with the connecting type movable block, the lower end of the connecting type movable block is fixedly welded with the bending type spring, the lower end of the bending type spring is fixedly welded with the connecting end block, the lower end of the connecting end block is fixedly welded with the limiting cylindrical groove, the two sides of the upper end surface of the inserting plate are fixedly provided with the limiting cylindrical groove, and the limiting cylindrical groove penetrates through the fixing table and extends into the mounting cavity;

the supporting type stand column is characterized in that eight installation type jacks are arranged in a penetrating mode in the front and back surface uniform arrangement mode, a metal end cap is movably arranged on the front side of each installation type jack, an insertion type cylindrical pin is fixedly welded on the back side of each metal end cap and inserted into each installation type jack, a clamping type circular groove is fixedly arranged on the back side of each installation type jack, a fixing circular cap is clamped on the surface of the back end face of each insertion type cylindrical pin, elastic strips are fixedly welded on the upper side and the lower side of the front end of each fixing circular cap, and a limiting clamping block is fixedly welded on one side of each elastic strip.

Preferably, the movable column comprises a pressing type column, a movable circular abutting plate, a movable abutting column and a connecting end strip, the movable circular abutting plate is fixedly welded at the lower end of the pressing type column, the movable abutting column is fixedly welded in the middle of the lower end of the movable circular abutting plate, and the connecting end strip is fixedly welded at the lower end of the movable abutting column.

Preferably, the movable cavity is arranged inside the fixed abutting plate, the lower end of the movable circular abutting plate is fixedly welded with the lower end of the movable cavity through an extension spring, the movable circular abutting plate is fixedly welded with the connecting end strip through a movable abutting column, and the periphery of the upper end of the movable circular abutting plate is movably connected with the upper end of the movable cavity in a matched mode.

Preferably, the movable connecting rod comprises a connecting block A, a connecting slash, a connecting block B and a movable square groove, wherein the connecting slash is fixedly welded on one side of the connecting block A, the connecting block B is fixedly welded on one side of the connecting slash, and the movable square groove is arranged on the front side and the rear side of the connecting block A in a penetrating mode.

Preferably, both ends of the connecting end strip are fixedly welded with movable short shafts A, movable holes are formed in the front side and the rear side of one end of the connecting block B in a penetrating mode, the movable short shafts A are located in the movable holes in the connecting block B, and the mounting cavity in the connecting end strip is connected with the movable holes in the connecting block B in a rotating and movable mode.

Preferably, the upper end of the connecting type movable block is fixedly welded with a movable short shaft B in a penetrating mode, the movable short shaft B is movably located in a movable square groove in the connecting block A, and the movable square groove in the upper end of the connecting block A is connected with the movable short shaft B in the connecting type movable block in a matched mode through movable clamping.

Preferably, the middle of the connecting slash penetrates through the connecting long shaft in a movable mode, the two sides of the connecting long shaft are fixedly connected with the inner wall of the mounting cavity through welding, and the movable square groove is fixedly connected with the connecting block B through the connecting slash in a welding mode.

Preferably, the connecting type movable block and the connecting end block are fixedly welded and connected through a bent spring, and a limiting insertion block is arranged in the limiting cylindrical groove.

Preferably, the installation of limiting fixture block is located the type circular groove that clamps, the fixed annular groove that clamps that is provided with in cartridge type cylindric lock rear end, through elastic strip fixed weld connection between limiting fixture block and the fixed cap, the one end fixed card of limiting fixture block is located the annular groove that clamps on cartridge type cylindric lock.

Preferably, the fixed ring plate and the plug-in mounting plate are fixedly connected through welding, and the fixed ring plate is movably inserted into the circular fixing groove.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the connecting long shaft, the connecting block A, the connecting movable block, the bent spring, the connecting end block and the limiting insertion block are matched with each other, so that the limiting insertion block is quickly separated from the limiting cylindrical groove, and the function of quickly disassembling a cable from a fixed frame is further realized;

2. according to the invention, through the mutual matching of the installation type jack, the sliding type track groove, the plug-in type cylindrical pin, the elastic strip and the limiting clamping block, the height of the supporting cross beam on the supporting type upright post can be randomly adjusted.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1 of the present invention as a whole;

FIG. 3 is an enlarged side cutaway view of FIG. 1 at A in accordance with the present invention;

FIG. 4 is an enlarged cutaway view of FIG. 3 at B of the present invention;

FIG. 5 is a side elevation, partial cutaway view of the present invention;

fig. 6 is an enlarged sectional view at C of fig. 5 according to the present invention.

In the figure: 1. a supporting type upright post; 2. a sliding-type track groove; 3. an installation type jack; 4. a metal end cap; 5. a support beam; 6. a fixed table; 7. a movable post; 701. pressing the profile post; 702. a movable round abutting plate; 703. a movable support pillar; 704. connecting the end strips; 8. a movable connecting rod; 801. connecting a block A; 802. connecting the slashes; 803. connecting block B; 804. a movable square groove; 9. a stationary ring plate; 10. a board is inserted; 11. a movable cylindrical groove; 12. a movable cavity; 13. extending the spring; 14. a mounting cavity; 15. inserting a square groove; 16. fixing the abutting plate; 17. a circular fixing groove; 18. a movable short shaft A; 19. a connection-type movable block; 20. a movable short shaft B; 21. a curved spring; 22. connecting the end block; 23. a limiting cylindrical groove; 24. a limiting plug-in mounting block; 25. inserting cylindrical pins; 26. clamping type circular grooves; 27. an elastic strip; 28. fixing the round cap; 29. and a limiting clamping block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 6, an embodiment of the present invention includes: a fixing frame for wires and cables comprises a supporting type upright post 1, a sliding type track groove 2 is arranged in the supporting type upright post 1 in a penetrating mode, a supporting cross beam 5 is movably inserted in the sliding type track groove 2, fixing tables 6 are fixedly welded on two sides of the upper end face of the supporting cross beam 5, a round fixing groove 17 is arranged in the middle of each fixing table 6 in a penetrating mode, inserting square grooves 15 are arranged on two sides of the inside of each round fixing groove 17 in a penetrating mode, inserting plates 10 are arranged in the inserting square grooves 15, a fixing ring plate 9 is fixedly welded between the two inserting plates 10, movable cylindrical grooves 11 are arranged on the front side and the rear side of the upper end face of each fixing table 6 in a penetrating mode, movable columns 7 are movably arranged in the movable cylindrical grooves 11, a movable cavity 12 is fixedly arranged at the lower end of each movable cylindrical groove 11, an installation cavity 14 is fixedly arranged in the inner portion of the lower end of the movable cavity 12, an extension spring 13 is fixedly arranged in the movable cavity 12, a fixed abutting plate 16 is fixedly welded in the inner space of the installation cavity 14, movable connecting rods 8 are movably arranged on two sides in the installation cavity 14, a connecting type movable block 19 is movably arranged at one end of each movable connecting rod 8, a bent spring 21 is fixedly welded at the lower end of each connecting type movable block 19, a connecting end block 22 is fixedly welded at the lower end of each bent spring 21, a limiting cylindrical groove 23 is fixedly welded at the lower end of each connecting end block 22, limiting cylindrical grooves 23 are fixedly arranged on two sides of the upper end surface of the insertion plate 10, and each limiting cylindrical groove 23 penetrates through the fixed table 6 and extends into the installation cavity 14;

eight installation type jacks 3 are uniformly arranged on the front and rear surfaces of the supporting type upright post 1 in a penetrating mode, a metal end cap 4 is movably arranged on the front side of each installation type jack 3, an insertion type cylindrical pin 25 is fixedly welded on the rear side of each metal end cap 4, the insertion type cylindrical pin 25 is inserted into each installation type jack 3, a clamping type circular groove 26 is fixedly arranged on the rear side of each installation type jack 3, a fixed circular cap 28 is clamped on the surface of the rear end face of each insertion type cylindrical pin 25, elastic strips 27 are fixedly welded on the upper side and the lower side of the front end of each fixed circular cap 28, and a limiting clamping block 29 is fixedly welded on one side of each elastic strip 27.

Further, the movable column 7 includes a pressing type column 701, a movable circular abutting plate 702, a movable abutting column 703 and a connecting end strip 704, the movable circular abutting plate 702 is fixedly welded at the lower end of the pressing type column 701, the movable abutting column 703 is fixedly welded at the middle of the lower end of the movable circular abutting plate 702, the connecting end strip 704 is fixedly welded at the lower end of the movable abutting column 703, and the movable circular abutting plate 702 can prevent the pressing type column 701 from coming out of the movable cavity 12.

Further, the movable cavity 12 is disposed inside the fixed abutting plate 16, the lower end of the movable circular abutting plate 702 is fixedly welded to the lower end inside the movable cavity 12 through the extension spring 13, the movable circular abutting plate 702 is fixedly welded to the connecting end bar 704 through the movable abutting column 703, the periphery of the upper end of the movable circular abutting plate 702 is movably connected to the upper end inside the movable cavity 12 in a matched manner, and the movable column 7 can integrally reciprocate up and down due to the elastic force of the extension spring 13.

Further, the movable connecting rod 8 comprises a connecting block A801, a connecting oblique rod 802, a connecting block B803 and a movable square groove 804, the connecting oblique rod 802 is fixedly welded on one side of the connecting block A801, the connecting block B803 is fixedly welded on one side of the connecting oblique rod 802, the movable square groove 804 is arranged on the front side and the rear side of the connecting block A801 in a penetrating mode, and the connecting oblique rod 802 enables the movable connecting rod 8 to rotate integrally.

Further, both ends of the connecting end strip 704 are fixedly welded with movable short shafts A18, the front side and the rear side of one end of the connecting block B803 are provided with movable holes in a penetrating manner, the movable short shafts A18 are located in the movable holes in the connecting block B803, and the mounting cavity 14 in the connecting end strip 704 is movably connected with the movable holes in the connecting block B803 in a rotating manner.

Furthermore, the upper end of the connecting type movable block 19 is fixedly welded with a movable short shaft B20 in a front-back penetrating manner, the movable short shaft B20 is movably located in the movable square groove 804 on the connecting block A801, the movable square groove 804 on the upper end of the connecting block A801 is connected with the movable short shaft B20 on the connecting type movable block 19 in a matched and movable clamping manner, and the activity of the movable short shaft B20 is greatly improved due to the movable square groove 804.

Further, a connecting long shaft penetrates through the middle of the connecting oblique rod 802 in a movable mode, the two sides of the connecting long shaft are fixedly connected with the inner wall of the installation cavity 14 through welding, the movable square groove 804 and the connecting block B803 are fixedly connected through welding through the connecting oblique rod 802, and the connecting long shaft in the middle of the connecting oblique rod 802 enables the connecting oblique rod 802 to rotate and move.

Furthermore, the connecting movable block 19 and the connecting end block 22 are fixedly welded and connected through a bent spring 21, the limiting insertion block 24 is inserted into the limiting cylindrical groove 23, and the bent spring 21 is beneficial to offsetting the rotating bending moment force of the connecting movable block 19.

Further, a limiting clamping block 29 is installed in the clamping circular groove 26, a clamping ring groove is fixedly formed in the rear end of the plug-in type cylindrical pin 25, the limiting clamping block 29 and the fixed circular cap 28 are fixedly welded through an elastic strip 27, one end of the limiting clamping block 29 is fixedly clamped in the clamping ring groove in the plug-in type cylindrical pin 25, and the limiting clamping block 29 can be limited and clamped through the clamping ring groove in the plug-in type cylindrical pin 25.

Further, the fixed ring plate 9 and the insertion plate 10 are fixedly connected through welding, the fixed ring plate 9 is movably inserted into the circular fixing groove 17, and the circular fixing groove 17 improves the insertion fixing effect on the fixed ring plate 9 and the insertion plate 10.

When in use, if the cables installed and fixed in the circular fixing groove 17 are quickly disassembled, the pressing type column 701 is pressed down, the pressing type column 701 moves downwards to drive the whole movable column 7 to move downwards, when the connecting end strip 704 moves downwards, the movable connecting rods 8 on two sides are driven to rotate and move downwards, the connecting end strip 704 is movably and rotatably connected with the connecting block B803 through the movable short shaft A18, so that the connecting end strip 704 can drive the connecting block B803 to move downwards, the connecting block A801 on the other point of the movable connecting rod 8 rotates upwards through the rotary activity of the connecting long shaft movably arranged in the middle of the connecting oblique bar 802, the connecting type movable block 19, the bending type spring 21, the connecting end block 22 and the limiting insertion block 24 are driven to move upwards, and the limiting insertion block 24 can be further quickly separated from the limiting cylindrical groove 23, the limiting effect of the limiting insertion block 24 on the insertion plate 10 is removed, the movable square groove 804 is arranged on the connecting block A801 in a penetrating mode, so that the movable short shaft B20 can be movably arranged in the movable square groove 804, the integral rotation activity of the movable connecting rod 8 is enhanced, the bending property of the bending spring 21 can offset the bending force of the movable connecting rod 8 during integral rotation by fixedly welding the bending spring 21 between the connecting type movable block 19 and the connecting end block 22, and the function that the limiting insertion block 24 is quickly separated from the limiting cylindrical groove 23 is achieved;

when the movable column 7 is loosened, the extension spring 13 in the movable cavity 12 can upwards press the pressing column 701, so that the pressing column 701 is restored to the original position, the movable abutting column 703 and the connecting end strip 704 are upwards moved, the connecting end strip 704 drives the movable connecting rod 8 to be restored to the original position, the limiting insertion block 24 and the limiting cylindrical groove 23 can be inserted and matched for connection under the rotation motion of the movable connecting rod 8, and the limiting insertion block 24 can perform limiting fixing action on the insertion plate 10;

the eight installation type jacks 3 are uniformly arranged on the front surface and the rear surface of the support type upright post 1 in a penetrating mode, the support cross beam 5 can slide in the sliding type track groove 2 on the support type upright post 1, the height of the support cross beam 5 can be adjusted between the two installation type jacks 3, the installation plug-in cylindrical pin 25 is inserted into the installation type jack 3, the plug-in cylindrical pin 25 can fix the support cross beam 5, one end of the plug-in cylindrical pin 25 can be fixedly provided with the fixed circular cap 28, the elastic strip 27 and the limiting clamping block 29 on the fixed circular cap 28 can be installed in the clamping type circular groove 26 in a clamping mode, the connection type movable block 19 can be clamped in the clamping circular groove in the surface of one end of the plug-in cylindrical pin 25 through the elastic force of the elastic strip 27, and the fixed circular cap 28 can conduct limiting fixing on the whole plug-in cylindrical pin 25.