Novel combined swim ring
By designing a combined swimming ring including casing and assembly pipe, the automatic locking and disassembly mechanism is used to solve the problem of fixed space occupied by the swimming ring structure, achieving the effect of space saving and rapid assembly.
Patent Information
- Application Number
- CN202411587923.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-02-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing swimming ring structure is fixed and takes up a lot of space, making it difficult to effectively save space during the transfer process.
Design a new combination swimming ring, including casing and assembly pipe, through the mount, vertical pole, limit pole and other structures of the inner wall of the casing, combined with threaded ring, locking assembly, docking assembly and connection assembly to realize assembly pipe disassembly and automatic locking reduce the area occupied.
By disassembling and installing the assembly pipe into the casing, the area occupied by the swimming ring in transport is reduced, and more swimming rings are conveniently placed. At the same time, rapid assembly and disassembly are achieved, and the efficiency of use is improved.
Smart Images

Figure CN119429031A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of swimming rings, and in particular relates to a novel combined swimming ring. Background Art
[0002] As a safety auxiliary device used in water, a swimming ring is often made of closed-cell foam material (such as polystyrene) and wrapped with fiberglass cloth on its surface. The buoyancy generated by the swimming ring in the water supports the user and provides safety protection for the user.
[0003] Some existing swimming rings directly use polystyrene as raw material during the production process and are molded into a whole at one time. The overall structure is relatively fixed, resulting in that the swimming rings with fixed structure occupy more space during the actual transportation of such swimming rings, which needs to be improved.
[0004] In order to solve the above problems, the present application provides a new type of combined swimming ring. Summary of the invention
[0005] The object of the present invention is to provide a novel combined swimming ring to solve the problem that the swimming ring in the prior art has a fixed structure and occupies a large amount of space.
[0006] To achieve the above object, the present invention provides the following technical solutions:
[0007] A novel combined swimming ring comprises a sleeve, an assembling tube is provided on the left side of the sleeve, two mounting seats are fixedly installed on the inner wall of the sleeve, a vertical pole is fixedly installed between the two mounting seats, two toggle plates are fixedly installed on the outer wall of the vertical pole, and two limit rods are also fixedly installed between the two mounting seats, and the two limit rods are both located on the right side of the vertical pole, a threaded ring is fixedly installed on one end of the sleeve, a locking assembly is installed on the end of the sleeve where the threaded ring is not installed, a docking assembly is installed on one end of the assembling tube, and a connecting assembly is installed on the end of the assembling tube where the docking assembly is not installed, two hidden grooves are provided on the outer wall of the assembling tube, and gripping assemblies are movably installed in the hidden grooves.
[0008] Preferably, a second threaded ring is fixedly mounted on one end of the assembling tube, a nut is movably mounted on the outer wall of the second threaded ring, and the second threaded ring has the same diameter as the threaded ring.
[0009] Preferably: the docking assembly includes a cross bar, the cross bar is provided with a groove, and two rotating shafts are rotatably installed in the groove, a movable plate is fixedly installed on the side where the two rotating shafts are close to each other, and the movable plate is connected to the inner wall of the cross bar groove through a plurality of return springs, a rotating plate is fixedly installed on the side where the two rotating shafts are away from each other, and an L-shaped connecting plate is fixedly installed on the side wall of the front end face of the rotating shaft.
[0010] Preferably, two fixing plates are fixedly mounted on the inner wall of the groove on the cross bar, the fixing plates are each provided with a plurality of clamping blocks, and the front end surface of the rotating plate is each provided with a plurality of clamping grooves matching the clamping blocks.
[0011] Preferably: the connecting component includes four cross slides arranged on the assembly tube, cross sliders are slidably installed in the four cross slides, and docking columns are fixedly installed on the four cross slides, and a connecting spring is provided in the cross slide, and the two ends of the connecting spring are respectively fixedly connected to the cross slider and the inner wall of the cross slide.
[0012] Preferably: the locking assembly includes a connecting tube, the connecting tube is fixedly connected to the sleeve as a whole, and the connecting tube is provided with four cross insertion grooves matching the cross slider, the outer wall of the connecting tube is provided with four adjustment grooves, the adjusting grooves are movably provided with lifting plates, and the lifting plates are fixedly provided with toggle columns, the toggle columns penetrate the inner walls of the adjusting grooves and extend into the cross insertion grooves, and the outer wall of the connecting tube is also provided with four arc-shaped hidden grooves.
[0013] Preferably: a rotating ring is rotatably installed on the outer wall of the connecting tube, four mounting grooves are provided on the inner wall of the rotating ring, a fixing rod is fixedly installed on the inner wall of the mounting groove, an opening is provided on the side of the fixing rod close to the connecting tube, and a telescopic rod is movably installed in the opening, and a toggle block is fixedly installed on the side of the telescopic rod close to the connecting tube.
[0014] Preferably: a spring is arranged in the opening on the fixing rod, and two ends of the spring are respectively fixedly connected to the inner wall of the opening of the fixing rod and the telescopic rod.
[0015] Preferably: the gripping assembly includes a lower support plate, the top of the lower support plate is provided with two grooves, and mounting shafts are rotatably installed in the grooves, a rubber plate is fixedly installed on the outer wall of one of the mounting shafts, a limit frame is fixedly installed on the top of the rubber plate, a second rubber plate is fixedly installed on a mounting shaft on which the rubber plate is not installed, and a baffle is fixedly installed on the second rubber plate.
[0016] Preferably: a mounting tube is fixedly installed in each of the hidden grooves on the assembling tube, a lifting rod is provided at the top of the mounting tube, and the bottom end of the lifting rod is connected to the inner wall of the mounting tube via a spring.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] 1. The present invention designs the inner diameter of the sleeve to be the same as the outer diameter of the assembling tube, so that the assembling tube can be installed into the sleeve. When transporting the swimming ring, the assembling tube can be directly disassembled and installed into the sleeve, which reduces the occupied area and facilitates the placement of more swimming rings for simultaneous rotation.
[0019] 2. When the assembling tube and the sleeve are assembled together, the cross slider is pushed by the connecting spring to be located in the cross slide groove and the cross insertion groove at the same time, which can limit the assembling tube from moving further and automatically lock and fix one end of the assembling tube, making it convenient for people to quickly assemble the swimming ring.
[0020] 3. In the process of moving the assembling tube of the present invention, the movable plate is pushed by the toggle plate and drives the rotating plate and the L-shaped connecting plate to move through the rotating shaft, so that the elbow part on the L-shaped connecting plate fits the limit rod located in the sleeve, and then the nut is controlled to rotate to connect the threaded ring and the second threaded ring together, so that the sleeve and one end of the assembling tube can be quickly assembled together. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 One of the three-dimensional diagrams of the present invention;
[0022] Figure 2 It is a schematic diagram of the assembled pipe structure of the present invention;
[0023] Figure 3 It is a schematic diagram of the local structure of the assembled pipe of the present invention;
[0024] Figure 4 It is a schematic diagram of the docking assembly structure of the present invention;
[0025] Figure 5 It is a schematic diagram of the structure of the connection assembly of the present invention;
[0026] Figure 6 It is a schematic diagram of the local structure of the casing of the present invention;
[0027] Figure 7 It is a schematic diagram of the structure of the locking assembly of the present invention;
[0028] Figure 8 It is a schematic diagram of the structure of the gripping assembly of the present invention.
[0029] In the figure: 1, sleeve; 2, assembly tube; 3, threaded ring; 4, mounting seat; 5, vertical rod; 6, toggle plate; 7, limit rod; 8, locking assembly; 9, second threaded ring; 10, nut; 11, docking assembly; 12, connecting assembly; 13, cross bar; 14, rotating shaft; 15, movable plate; 16, rotating plate; 17, L-shaped connecting plate; 18, fixed plate; 19, slot; 20, block; 21, reset spring; 22, cross slide; 23 , cross slider; 24, docking column; 25, connecting spring; 26, connecting pipe; 27, cross insertion slot; 28, rotating ring; 29, installation slot; 30, fixing rod; 31, telescopic rod; 32, toggle block; 33, adjustment slot; 34, lifting plate; 35, toggle column; 36, arc-shaped hidden slot; 37, gripping assembly; 38, lower support plate; 39, installation shaft; 40, rubber plate; 41, limit frame; 42, second rubber plate; 43, baffle. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] Reference Figure 1-Figure 8 As shown, the present invention provides a novel combined swimming ring, including a sleeve 1, an assembling tube 2 is arranged on the left side of the sleeve 1, the assembling tube 2 and the sleeve 1 are both made of polystyrene as raw materials, the inner diameter of the sleeve 1 is the same as the outer diameter of the assembling tube 2, which can facilitate the assembling tube 2 to be partially placed in the sleeve 1 for hidden placement when transporting the swimming ring, thereby reducing its occupied area, two mounting seats 4 are fixedly installed on the inner wall of the sleeve 1, a vertical pole 5 is fixedly installed between the two mounting seats 4, and two vertical poles 5 are fixedly installed on the outer wall of the vertical pole 5 A toggle plate 6, and the two toggle plates 6 both extend out of the sleeve 1, two limit rods 7 are fixedly installed between the two mounting seats 4, and the two limit rods 7 are both located on the right side of the vertical pole 5, a threaded ring 3 is fixedly installed at one end of the sleeve 1, a locking component 8 is installed at the end of the sleeve 1 where the threaded ring 3 is not installed, a docking component 11 is installed at one end of the assembling tube 2, and a connecting component 12 is installed at the end of the assembling tube 2 where the docking component 11 is not installed, two hidden grooves are provided on the outer wall of the assembling tube 2, and grasping components 37 are movably installed in the hidden grooves.
[0032] Reference Figure 1As shown, a second threaded ring 9 is fixedly installed at one end of the assembling tube 2, a nut 10 is movably mounted on the outer wall of the second threaded ring 9, and the diameter of the second threaded ring 9 is the same as that of the threaded ring 3. After the assembling tube 2 is taken out from the sleeve 1, the threaded ring 3 and the second threaded ring 9 are adjusted to the same horizontal height, and the threaded ring 3 and the second threaded ring 9 are connected together by rotating the nut 10, so that one end of the sleeve 1 can be connected to the assembling tube 2 to form a whole.
[0033] Reference Figure 4-Figure 5 As shown, the docking assembly 11 includes a cross bar 13, a groove is provided on the cross bar 13, and two rotating shafts 14 are rotatably installed in the groove, a movable plate 15 is fixedly installed on the side where the two rotating shafts 14 are close to each other, and the movable plate 15 is connected to the inner wall of the groove of the cross bar 13 by a plurality of return springs 21, and a rotating plate 16 is fixedly installed on the side where the two rotating shafts 14 are away from each other, and an L-shaped connecting plate 17 is fixedly installed on the side wall of the front end surface of the rotating shaft 14. When the threaded ring 3 and the second threaded ring 9 are connected together, the toggle plate 6 located in the sleeve 1 will contact the movable plate 15 located on the cross bar 13, and the movable plate 15 will drive the rotating plate 16 and the L-shaped connecting plate 17 to move through the rotating shaft 14. At this time, the elbow part on the L-shaped connecting plate 17 will fit the limit rod 7 located in the sleeve 1, restricting the assembly pipe 2 from continuing to move, and being able to temporarily fix one end of the assembly pipe 2, so that the threaded ring 3 and the second threaded ring 9 can be connected together by controlling the rotation of the nut 10.
[0034] Reference Figure 4-Figure 5 As shown, two fixed plates 18 are fixedly installed on the inner wall of the groove on the cross bar 13, and a plurality of blocks 20 are provided on the fixed plates 18, and a plurality of slots 19 matching the blocks 20 are provided on the front end surface of the rotating plate 16. When the toggle plate 6 toggles the movable plate 15 to rotate through the rotating shaft 14, the rotating plate 16 on the rotating shaft 14 will fit onto the fixed plate 18, and the blocks 20 will be stuck into the slots 19, limiting the continued rotation of the rotating shaft 14, thereby prompting that the assembling tube 2 has moved to the desired position, and the nut 10 can be controlled to rotate. When disassembling the assembling tube 2, the nut 10 can be controlled to rotate to disconnect the connection between the threaded ring 3 and the second threaded ring 9, so that the cross bar 13 is exposed to the outside, so that the rotating plate 16 can be controlled to rotate, disconnecting the contact between it and the fixed plate 18, and then the assembling tube 2 can be pulled to move.
[0035] Reference Figure 6-Figure 7As shown, the connecting component 12 includes four cross slides 22 arranged on the assembling tube 2, and cross sliders 23 are slidably installed in the four cross slides 22, and docking columns 24 are fixedly installed on the four cross sliders 23, and a connecting spring 25 is provided in the cross slide 22, and the two ends of the connecting spring 25 are respectively fixedly connected to the cross slider 23 and the inner wall of the cross slide 22, and the locking component 8 includes a connecting tube 26, and the connecting tube 26 is fixedly connected to the sleeve 1 as a whole, and the connecting tube 26 is provided with four cross insertion grooves 27 matching the cross slider 23, and the outer wall of the connecting tube 26 is provided with four adjusting grooves 33, and a lifting plate 34 is movably installed in the adjusting groove 33, and the lifting plate 34 is provided with two chamfers on one side close to the rotating ring 28, which can facilitate the removal of the toggle block 32 that extends into the adjusting groove 33 and contacts the lifting plate 34 during the rotation of the rotating ring 28, so as to prevent the toggle block 32 from moving into the adjusting groove The lifting plate 34 is fixedly provided with a toggle post 35 which passes through the inner wall of the adjusting slot 33 and extends into the cross insertion slot 27. Four arc-shaped hidden slots 36 are also provided on the outer wall of the connecting tube 26. When the assembling tube 2 is taken out of the sleeve 1, after the cross slide block 23 moves to the position of the cross insertion slot 27, the connecting spring 25 pushes the cross slide block 23 to slide out of the cross slide slot 22 and insert it into the cross insertion slot 27. At this time, the docking post 24 contacts the toggle post 35 located in the cross insertion slot 27, causing the lifting plate 34 to move and fit the inner wall of the rotating ring 28 to prevent the cross slide block 23 from completely disengaging from the cross slide slot 22. That is, the cross slide block 23 is simultaneously located in the cross slide slot 22 and the cross insertion slot 27, which can limit the assembling tube 2 from continuing to move and automatically lock and fix one end of the assembling tube 2.
[0036] Reference Figure 7 As shown, a rotating ring 28 is rotatably installed on the outer wall of the connecting tube 26, and four mounting grooves 29 are provided on the inner wall of the rotating ring 28. A fixing rod 30 is fixedly installed on the inner wall of the mounting groove 29. An opening is provided on the side of the fixing rod 30 close to the connecting tube 26, and a telescopic rod 31 is movably installed in the opening, and a toggle block 32 is fixedly installed on the side of the telescopic rod 31 close to the connecting tube 26. When the swimming ring is not in use, the rotating ring 28 can be controlled to rotate to move the control toggle block 32 out of the arc-shaped hidden groove 36 and into the mounting groove 29. When the toggle block 32 moves to the position of the adjusting groove 33, the spring in the fixing rod 30 will push the toggle block 32 into the adjusting groove 33 and push the lifting plate 34 and the toggle column 35 to move, so that the toggle column 35 pushes the cross slide block 23 back into the cross slide groove 22. At this time, the assembling tube 2 can be reinstalled into the sleeve 1.
[0037] Reference Figure 7As shown, a spring is provided in the opening on the fixed rod 30, and the two ends of the spring are respectively fixedly connected to the inner wall of the opening of the fixed rod 30 and the telescopic rod 31, and the spring elastic force in the opening of the fixed rod 30 is greater than the thrust of the connecting spring 25, so that the cross slide 23 can be pushed back into the cross slide groove 22 by the spring in the fixed rod 30.
[0038] Reference Figure 8 As shown, the gripping assembly 37 includes a lower support plate 38, the top of the lower support plate 38 is provided with two grooves, and the grooves are rotatably installed with mounting shafts 39, and the mounting shaft 39 is connected to the lower support plate 38 by a spiral spring, so that after the assembling tube 2 is taken out of the sleeve 1, the spiral spring rotates to make the rubber plate 40 and the second rubber plate 42 rotate upward and extend out from the hidden groove of the assembling tube 2, which is convenient for people to grasp. The rubber plate 40 is fixedly installed on the outer wall of a mounting shaft 39, and the limit frame 41 is fixedly installed on the top of the rubber plate 40. The second rubber plate 42 is fixedly installed on the mounting shaft 39 without the rubber plate 40, and the width of the second rubber plate 42 is equal to the inner frame length of the limit frame 41. The same, and the second rubber plate 42 passes through the limiting frame 41, a baffle 43 is fixedly installed on the second rubber plate 42, a plurality of clamping posts are provided on the baffle 43, and a plurality of clamping grooves matching the clamping posts are provided on the limiting frame 41. The clamping posts are inserted into the clamping grooves to increase the connection strength between the limiting frame 41 and the baffle 43, and avoid the second rubber plate 42 and the rubber plate 40 from being displaced at will. The rubber plate 40 and the second rubber plate 42 are rotated by rotating the mounting shaft 39. When the baffle 43 is fitted with the limiting frame 41, it is convenient for people to hold or directly pass their arms through the area between the rubber plate 40 and the lower supporting plate 38, so that they can lie on the swimming ring in water when using the swimming ring.
[0039] Reference Figure 1-Figure 8 As shown, the hidden grooves on the assembling tube 2 are fixedly installed with mounting tubes, and a lifting rod is provided at the top of the mounting tube, and the bottom end of the lifting rod is connected to the inner wall of the mounting tube by a spring, and the top of the lifting rod is fixedly connected to the lower support plate 38, so that when the assembling tube 2 is placed in the sleeve 1, the lifting rod is retracted into the mounting tube, and at this time the lower support plate 38 is retracted into the hidden groove on the assembling tube 2, and the rubber sheet 40 and the second rubber sheet 42 are squeezed and deformed, so as to prevent the hidden assembling tube 2 from being retracted into the sleeve 1.
[0040] The implementation principle of this embodiment is as follows: when in use, the assembling tube 2 is pulled out of the sleeve 1, and when the toggle plate 6 contacts the movable plate 15 located on the cross bar 13, the movable plate 15 will drive the rotating plate 16 and the L-shaped connecting plate 17 to move through the rotating shaft 14. At this time, the elbow part on the L-shaped connecting plate 17 will fit the limit rod 7 located in the sleeve 1, limiting the assembling tube 2 from continuing to move, and then control the nut 10 to rotate to connect the threaded ring 3 with the second threaded ring 9 together. At this time, the connecting spring 25 will push the cross slider 23 to slide out of the cross slide groove 22 and insert it into the cross insertion groove 27. The cross slider 23 is simultaneously located in the cross slide groove 22 and the cross insertion groove 27, limiting the assembling tube 2 from continuing to move, completing the assembly of the assembling tube 2 and the sleeve 1, that is, assembling them into a swimming ring. At this time, the lower support plate 38 moves up from the assembling tube 2, and the rubber plate 40 and the second rubber plate 42 are manually toggled to move upward, so that the limit frame 41 fits with the baffle 43 to complete the installation.
[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A novel combined swimming ring, comprising a sleeve (1), characterized in that: An assembling tube (2) is provided on the left side of the sleeve (1); two mounting seats (4) are fixedly installed on the inner wall of the sleeve (1); a vertical rod (5) is fixedly installed between the two mounting seats (4); two toggle plates (6) are fixedly installed on the outer wall of the vertical rod (5); and two limit rods (7) are also fixedly installed between the two mounting seats (4), and the two limit rods (7) are both located on the right side of the vertical rod (5); a threaded ring (3) is fixedly installed on one end of the sleeve (1); a locking component (8) is installed on the end of the sleeve (1) where the threaded ring (3) is not installed; a docking component (11) is installed on one end of the assembling tube (2); and a connecting component (12) is installed on the end of the assembling tube (2) where the docking component (11) is not installed; two hidden grooves are provided on the outer wall of the assembling tube (2), and gripping components (37) are movably installed in the hidden grooves.
2. A novel combined swimming ring according to claim 1, characterized in that: A second threaded ring (9) is fixedly mounted on one end of the assembly tube (2), a nut (10) is movably mounted on the outer wall of the second threaded ring (9), and the diameter of the second threaded ring (9) is the same as that of the threaded ring (3).
3. A novel combined swimming ring according to claim 1, characterized in that: The docking assembly (11) comprises a cross bar (13), the cross bar (13) is provided with a groove, and two rotating shafts (14) are rotatably installed in the groove, a movable plate (15) is fixedly installed on the side where the two rotating shafts (14) are close to each other, and the movable plate (15) and the inner wall of the groove of the cross bar (13) are connected by a plurality of return springs (21), a rotating plate (16) is fixedly installed on the side where the two rotating shafts (14) are away from each other, and an L-shaped connecting plate (17) is fixedly installed on the side wall of the front end surface of the rotating shaft (14).
4. A new type of combined swimming ring according to claim 3, characterized in that: Two fixed plates (18) are fixedly mounted on the inner wall of the groove on the crossbar (13), and a plurality of clamping blocks (20) are provided on the fixed plates (18), and a plurality of clamping grooves (19) matching the clamping blocks (20) are provided on the front end surface of the rotating plate (16).
5. The novel combined swimming ring according to claim 1 is characterized in that: The connecting assembly (12) comprises four cross slide grooves (22) arranged on the assembly tube (2), a cross slider (23) is slidably installed in each of the four cross slide grooves (22), and a docking column (24) is fixedly installed on each of the four cross sliders (23), and a connecting spring (25) is provided in the cross slide groove (22), and two ends of the connecting spring (25) are respectively fixedly connected to the cross slider (23) and the inner wall of the cross slide groove (22).
6. The novel combined swimming ring according to claim 1 is characterized in that: The locking assembly (8) comprises a connecting tube (26), the connecting tube (26) being fixedly connected to the sleeve (1) as a whole, and the connecting tube (26) being provided with four cross insertion grooves (27) matching the cross slider (23), and the outer wall of the connecting tube (26) being provided with four adjustment grooves (33), each of which has a lifting plate (34) movably installed in the adjustment grooves (33), and each of which has a toggle column (35) fixedly installed on the lifting plate (34), the toggle column (35) penetrating the inner wall of the adjustment groove (33) and extending into the cross insertion groove (27), and the outer wall of the connecting tube (26) being provided with four arc-shaped hidden grooves (36).
7. A novel combined swimming ring according to claim 6, characterized in that: A rotating ring (28) is rotatably mounted on the outer wall of the connecting tube (26), four mounting grooves (29) are provided on the inner wall of the rotating ring (28), a fixing rod (30) is fixedly mounted on the inner wall of the mounting groove (29), an opening is provided on a side of the fixing rod (30) close to the connecting tube (26), a telescopic rod (31) is movably mounted in the opening, and a toggle block (32) is fixedly mounted on a side of the telescopic rod (31) close to the connecting tube (26).
8. A new type of combined swimming ring according to claim 7, characterized in that: A spring is arranged in the opening of the fixing rod (30), and two ends of the spring are respectively fixedly connected to the inner wall of the opening of the fixing rod (30) and the telescopic rod (31).
9. The novel combined swimming ring according to claim 1 is characterized in that: The gripping assembly (37) comprises a lower supporting plate (38), the top of the lower supporting plate (38) being provided with two grooves, and a mounting shaft (39) being rotatably mounted in each of the grooves, a rubber plate (40) being fixedly mounted on the outer wall of one of the mounting shafts (39), a limit frame (41) being fixedly mounted on the top of the rubber plate (40), a second rubber plate (42) being fixedly mounted on a mounting shaft (39) not mounted with the rubber plate (40), and a baffle (43) being fixedly mounted on the second rubber plate (42).
10. The novel combined swimming ring according to claim 1, characterized in that: A mounting tube is fixedly installed in each of the hidden grooves on the assembling tube (2), and a lifting rod is provided at the top of the mounting tube, and the bottom end of the lifting rod is connected to the inner wall of the mounting tube via a spring.