CN110512829B - Floor structure is built in room - Google Patents

Abstract

The invention discloses a floor structure for a house building, which is characterized by comprising a wood floor component, wherein a plurality of main keels are connected below the wood floor component, a plurality of supporting components are connected below the main keels, each supporting component comprises an upper supporting block detachably and slidably connected with the main keels in the length direction, a lower supporting block is detachably and slidably connected below the upper supporting block, and the sliding direction of the lower supporting block is vertical to that of the upper supporting block. The invention has the function of conveniently changing the position of the threading channel in the keel assembly according to the installation direction of the electric wire, so that people can conveniently install the electric wire.

Description

Floor structure is built in room

Technical Field

The invention relates to the field of building floors, in particular to a building floor structure.

Background

The house building refers to a house or a place where people perform production, living or other activities, such as industrial buildings, civil buildings, agricultural buildings and the like, and a floor structure in the house is one of extrusion facilities of a house building structure and is mainly used for supporting.

At present, chinese patent with application publication number CN109779194 discloses a floor structure is built in room, it includes timber apron subassembly and the fossil fragments subassembly that is located timber apron subassembly below, the fossil fragments subassembly includes the main joist and is located the fossil fragments support of main joist below, the fossil fragments support including more than three support slider and a spacing slider, support slider and spacing slider all with main joist detachably sliding connection in length, spacing slider's ground height is higher than the ground height of support slider.

When the floor is installed in the room, the position of the limiting slide block can be limited according to requirements, the ground height of the limiting slide block is higher than that of the supporting slide block, a threading channel is formed between the limiting slide block and the ground, people can conveniently pass electric wires and pipelines through the channel, however, an installer only carries out general measurement and calculation when the limiting slide block is installed, deviation easily occurs in the position of the limiting slide block, the limiting slide block can be placed on the ground after people mistakenly install the limiting slide block and install other supporting slide blocks, the position of the limiting slide block can be changed after the plurality of supporting slide blocks are detached if the position of the limiting slide block is found to be incorrect, and people are inconvenient to install the floor.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a floor structure for a building, which has the function of conveniently changing the position of a threading channel in a keel assembly according to the installation direction of an electric wire so as to facilitate the installation of people.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a floor structure is built in room, includes the timber apron subassembly, timber apron subassembly below is connected with a plurality of main joist, the main joist below is connected with a plurality of supporting components, supporting component includes the last supporting shoe that can dismantle sliding connection with the main joist on length direction, but the below of going up the supporting shoe is dismantled sliding connection and is had the bottom suspension shoe, the slip direction of bottom suspension shoe is perpendicular with the slip direction of last supporting shoe.

Through adopting the above-mentioned technical scheme, when the installation fossil fragments subassembly, can demolish the bottom suspension splice that corresponds according to the overall arrangement of subaerial electric wire, can form a threading passageway between the support assembly of having demolishd the bottom suspension splice and the ground, the people of being convenient for install the electric wire, and when the position of finding the threading passageway is not to time, can confirm the position again and demolish the bottom suspension splice that corresponds the support assembly, because the slip direction of bottom suspension splice is perpendicular with the slip direction of last support splice, make people need not to remove other support assemblies when each support assembly is installed and is demolishd required bottom suspension splice in place, so make people can in time adjust the position of threading passageway, and the process of adjusting is more pointed, and it is more convenient to operate.

The invention is further configured to: the main joist lower surface is equipped with the spout that extends along length direction, and the cross-section of spout is trapezoidal, go up be equipped with on the bracer with spout complex slider, the lower surface of going up the bracer is equipped with first connecting groove, the extending direction of first connecting groove is perpendicular with the direction of spout, be equipped with on the under bracing piece with first connecting groove complex first connecting block.

Through adopting above-mentioned technical scheme, through being connected of slider and spout realize going up supporting shoe and main joist's dismantled sliding connection, realize the dismantled sliding connection of lower supporting shoe and last supporting shoe through the cooperation of first connecting block and first connecting groove.

The invention is further configured to: the lower surface of lower supporting shoe is equipped with the second spread groove that the extending direction is the same with first spread groove size, the downside of lower supporting shoe is equipped with the buffer block, be equipped with on the buffer block with first spread groove complex second spread groove, the buffer block adopts the rubber material to make.

Through adopting above-mentioned technical scheme, the buffer block can play the shock attenuation cushioning effect and make supporting shoe more flexible when contacting with ground, has certain deformation space, and after demolising the lower shoe, can be connected buffer block and last supporting shoe, make the electric wire through last supporting shoe below separated by the buffer block, avoid electric wire and last supporting shoe contact, make main joist and last supporting shoe be difficult for electrified when the electric wire electric leakage, improved the security.

The invention is further configured to: the length of the lower supporting block is smaller than that of the upper supporting block, the length of the buffer block is the same as that of the lower supporting block, a gap is reserved between two adjacent lower supporting blocks in the length direction of the main framework, and a gap is reserved between the adjacent buffer blocks.

Through adopting above-mentioned technical scheme, adjacent supporting component makes supporting component's position be difficult for sliding through the mutual butt of last supporting shoe, and all leaves the gap between two adjacent lower supporting shoes and two adjacent buffer blocks for people are difficult for receiving the interference of lower supporting shoe and the buffer block on the adjacent supporting component when demolising lower supporting shoe and buffer block, thereby are convenient for people demolish lower supporting shoe and buffer block.

The invention is further configured to: the left side and the right side of the upper supporting block are both connected with upper limiting blocks in a sliding manner, upper positioning grooves are formed in the upper supporting block, and upper positioning rods connected with the two upper limiting blocks are arranged in the upper positioning grooves; the left and right sides sliding connection of lower supporting shoe has lower spacing piece, is equipped with down the constant head tank in the lower supporting shoe, is equipped with the lower locating lever of being connected with two lower spacing pieces in the constant head tank down, go up the locating lever and adopt to have magnetic material to make, first magnet has all been inlayed at the upper and lower both ends of going up the constant head tank, and lower locating lever adopts to have magnetic material to make, the upper and lower both ends of constant head tank all just inlayed the second magnet down.

By adopting the technical scheme, when the lower supporting block is connected with the upper supporting block, the upper positioning rod is matched with the first magnet on the lower side, so that the upper positioning block shields the first connecting groove, and the lower supporting block is not easy to slide relative to the upper supporting block; when the supporting block and the lower limiting block are separated, the upper positioning rod is matched with the first magnet on the upper side, so that the upper limiting block is moved to the upper end of the first connecting groove, and people can separate the first connecting block from the first connecting groove conveniently. When the buffer block is connected with the upper supporting block, the upper limiting block can also play a role in preventing the buffer block from sliding relative to the upper supporting block.

The invention is further configured to: the left side and the right side of the lower supporting block are provided with pull grooves, and the pull grooves are L-shaped.

Through adopting above-mentioned technical scheme, through pulling the lower shoe of pulling that the kerve can be better, be convenient for separate lower shoe and last supporting shoe.

The invention is further configured to: a first blocking block is fixed at the upper end of the upper limiting block, and a second blocking block is fixed at the upper end of the lower limiting block.

Through adopting above-mentioned technical scheme, when last stopper sheltered from the tip of first connecting groove, the first dog that shelters from last constant head tank makes other objects be difficult for falling into in the constant head tank. When spacing when sheltering from the tip of second spread groove down, the second shelters from the dog and shelters from the constant head tank down and make other objects be difficult for falling into down in the constant head tank.

The invention is further configured to: the wood floor component comprises a base layer located above the keel component, a waterproof membrane is arranged above the base layer, a plurality of ceramic tiles are embedded above the waterproof layer, the base layer comprises a plurality of rough floors stretching across two main keels and connecting pieces connected with the rough floors, the two ends of each rough floor are located at the middle parts of the main keels at the two ends and connected with the main keels through positioning pins, reinforcing grooves are formed in the front and the rear ends of the two sides of each rough floor, fixing grooves are formed in the reinforcing grooves, the connecting pieces comprise reinforcing plates and clamping plates fixed at the two ends of the reinforcing plates, connecting sleeves are wrapped in the circumferential direction of the reinforcing plates, the connecting grooves are made of rubber and can be in interference fit with the reinforcing grooves.

Through adopting above-mentioned technical scheme, connect two adjacent mao floors through the connecting piece, strengthened the wholeness and the support nature of basic unit to the connecting piece can be embedded into in strengthening groove and the fixed slot, makes the connecting piece can not surpass the mao floor, and the people of being convenient for install the mao floor.

The invention is further configured to: the one side that adjacent main joist is relative is equipped with a plurality of mounting grooves along length direction equipartition, and two adjacent main joists are equipped with a plurality of bracing pieces, and in two mounting grooves were embedded into respectively at the both ends of bracing piece, the below on hair floor was equipped with a plurality of auxiliary assemblies, and every auxiliary assembly is connected with the bracing piece.

Through adopting above-mentioned technical scheme, through the connection of auxiliary assembly and bracing piece for the middle part on hair floor is when receiving pressure, and the bracing piece can play the supporting role, makes the difficult bending damage on hair floor.

The invention is further configured to: the auxiliary assembly comprises a fixing block fixed at the lower end of the floor board, a telescopic groove is formed in the lower end of the fixing block, a telescopic rod is connected in the telescopic groove in a sliding mode, the telescopic rod is abutted to the bottom of the telescopic groove through an auxiliary spring, an auxiliary block made of rubber is fixed at the lower end of the telescopic rod, and a supporting groove in interference fit with the supporting rod is formed in the lower end of the auxiliary block.

Through adopting above-mentioned technical scheme, when the middle part on the hair floor was pressed, can drive the fixed block and move down and continue compression auxiliary spring, can take the telescopic link to move down after auxiliary spring can't continue the compression, and the telescopic link receives the support of bracing piece to make the hair floor difficult excessive deformation, and then make the hair floor not fragile, and after the pressure on the hair floor was got rid of, auxiliary spring can help the hair floor to resume, further improves the life-span on hair floor.

In conclusion, the invention has the following beneficial effects:

1. the lower supporting block of each supporting component can be independently detached, so that the upper supporting block and the ground can form a threading channel through which a power supply line passes, people can conveniently change the position of the threading channel in time according to the position of the power line, and other supporting components do not need to be moved, so that people can install the cable conveniently;

2. the connection of the auxiliary assembly and the supporting rod enables the rough floor not to be deformed and damaged easily, the supporting force of the floor is improved, and the service life of the rough floor is prolonged.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is a schematic structural diagram of another perspective of the present embodiment;

FIG. 3 is a schematic view for highlighting the structure of the auxiliary components in the present embodiment;

FIG. 4 is a schematic partial cross-sectional view highlighting the connection of the lower support block with the bumper block;

FIG. 5 is an exploded view of the support assembly of this embodiment;

fig. 6 is an enlarged schematic view at a of fig. 5.

Reference numerals: 1. a wood floor assembly; 2. a main keel; 3. a support assembly; 4. a support bar; 5. an auxiliary component; 11. a base layer; 12. a water-resistant film; 13. ceramic tiles; 111. a rough floor; 112. a connecting member; 113. floor strips; 1111. a reinforcing groove; 1112. fixing grooves; 1121. a reinforcing plate; 1122. clamping a plate; 1123. connecting sleeves; 21. a chute; 22. mounting grooves; 31. an upper support block; 32. a lower support block; 33. a buffer block; 34. an upper limit block; 35. an upper positioning rod; 36. a lower limiting block; 37. a lower positioning rod; 38. a first stopper block; 39. a second shutter block; 311. a first connecting groove; 312. a slider; 313. an upper positioning groove; 314. a first magnet; 321. a second connecting groove; 322. a first connection block; 323. a lower positioning groove; 324. a second magnet; 325. groove drawing; 331. a second connecting block; 51. a fixed block; 52. a telescopic rod; 53. an auxiliary spring; 54. an auxiliary block; 511. a telescopic groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment discloses a floor structure is built in room, as shown in fig. 1, fig. 2, including timber apron subassembly 1 and a plurality of main joist 2 that are located timber apron subassembly 1 below, main joist 2 below is connected with a plurality of supporting components 3.

As shown in fig. 3, 4 and 5, the lower surface of the main keel 2 is provided with a sliding groove 21 extending along the length direction, the cross section of the sliding groove 21 is trapezoidal, the supporting component 3 includes an upper supporting block 31 located below the main keel 2, and the upper supporting block 31 is provided with a sliding block 312 engaged with the sliding groove 21.

As shown in fig. 3, 4, and 5, a first connection groove 311 is provided on a lower surface of the upper support block 31, an extending direction of the first connection groove 311 is perpendicular to a direction of the sliding groove 21, a lower support block 32 is provided on a lower side of the upper support block 31, a first connection block 322 engaged with the first connection groove 311 is provided on the lower support block 32, a second connection groove 321 having the same size and extending direction as the first connection groove 311 is provided on a lower surface of the lower support block 32, a buffer block 33 is provided on a lower side of the lower support block 32, a second connection block 331 engaged with the first connection groove 311 is provided on the buffer block 33, the second connection block 331 is also engaged with the first connection groove 311, and the buffer block 33 is made of rubber.

As shown in fig. 3, 4 and 5, when the keel assembly is installed, the lower support block 32 of the corresponding support assembly 3 can be removed and the corresponding buffer block 33 is connected with the upper support block 31 according to the layout of the electric wires on the ground, so that when the keel assembly is installed on the ground, a threading channel can be formed between the support assembly 3 with the lower support block 32 removed and the ground, so that people can install the electric wires conveniently, and when the position of the threading channel is found out not to be right, the position can be redetermined and the lower support block 32 of the corresponding support assembly 3 can be removed, other support assemblies 3 do not need to be moved, so that people can adjust the position of the threading channel in time, and the adjustment process is more pertinent and the operation is more convenient. The length of lower supporting shoe 32 slightly is less than the length of last supporting shoe 31, and the length of buffer block 33 is the same with lower supporting shoe 32 for two adjacent lower supporting shoes 32 leave the gap and leave the gap between the adjacent buffer block 33 on the main frame length direction, are convenient for people with lower supporting shoe 32 and the separation of last supporting shoe 31.

As shown in fig. 3, 4 and 5, upper limit blocks 34 are slidably connected to both left and right sides of the upper support block 31, an upper positioning groove 313 is formed in the upper support block 31, an upper positioning rod 35 connected to the two upper limit blocks 34 is arranged in the upper positioning groove 313, the upper positioning rod 35 is made of a magnetic material, and first magnets 314 are embedded at both upper and lower ends of the upper positioning groove 313. When the lower support block 32 is connected with the upper support block 31, the upper positioning rod 35 is matched with the first magnet 314 on the lower side, so that the upper positioning block 34 shields the first connecting groove 311, and the lower support block 32 is not easy to slide relative to the upper support block 31; when the upper support block 31 and the lower limit block 36 need to be separated, the upper positioning rod 35 is matched with the first magnet 314 on the upper side, so that the upper limit block 34 moves to the upper end of the first connecting groove 311, and people can conveniently separate the first connecting block 322 from the first connecting groove 311. When the buffer block 33 is coupled to the upper support block 31, the upper stopper 34 also serves to prevent the buffer block 33 from sliding with respect to the upper support block 31.

As shown in fig. 3, 4, and 5, lower limit blocks 36 are slidably connected to left and right sides of the lower support block 32, a lower positioning groove 323 is provided in the lower support block 32, a lower positioning rod 37 connected to the two lower limit blocks 36 is provided in the lower positioning groove 323, the lower positioning rod 37 is made of a magnetic material, and second magnets 324 are embedded at upper and lower ends of the lower positioning groove 323. When the lower supporting block 32 is connected with the buffer block 33, the lower positioning rod 37 is matched with the second magnet 324 on the lower side, so that the lower limiting block 36 shields the second connecting groove 321, and the buffer block 33 is not easy to slide relative to the lower supporting block 32; when the lower support block 32 needs to be separated from the buffer block 33, the lower positioning rod 37 is matched with the second magnet 324 on the upper side, so that the lower limit block 36 moves to the upper end of the second connecting groove 321, and people can separate the second connecting block 331 from the second connecting groove 321 conveniently.

As shown in fig. 3, 4 and 5, a first stopper 38 is fixed to an upper end of the upper stopper 34, and a second stopper 39 is fixed to an upper end of the lower stopper 36. When the upper stopper 34 blocks the end of the first connecting groove 311, the first blocking piece 38 blocks the upper positioning groove 313 so that other objects are not easily dropped into the upper positioning groove 313. When the lower limiting block 36 blocks the end of the second connecting groove 321, the second blocking piece 39 blocks the lower positioning groove 323, so that other objects are not easy to fall into the lower positioning groove 323. The left side and the right side of the lower supporting block 32 are provided with the pull grooves 325, and the pull grooves 325 are L-shaped, so that people can pull the lower supporting block 32 to separate the lower supporting block 32 from the upper supporting block 31 or separate the lower supporting block 32 from the buffer block 33. The side of the upper stopper 34 away from the upper positioning groove 313 is flush with the side wall of the main frame and the outer wall of the first stopper 38, and the side of the lower stopper 36 away from the lower positioning groove 323 is flush with the side wall of the main frame and the outer wall of the second stopper 39.

As shown in fig. 1, 3 and 6, the wood floor assembly 1 includes a base layer 11 located above the keel assembly, a waterproof film 12 is disposed above the base layer 11, and a plurality of tiles 13 are embedded above the waterproof layer. The base layer 11 includes a plurality of raised floor boards 111 crossing the two main runners 2, a connecting member 112 connecting the raised floor boards 111, and floor strips 113 filling the side edges of the raised floor boards 111, and both ends of the raised floor boards 111 are located at the middle of the main runners 2 at both ends and are connected to the main runners 2 by positioning pins. Both ends all are equipped with reinforcing groove 1111 around the both sides around the false floor 111, are equipped with fixed slot 1112 in the reinforcing groove 1111, and connecting piece 112 includes reinforcing plate 1121 and fixes the cardboard 1122 at reinforcing plate 1121 both ends, and the circumference parcel of reinforcing plate 1121 has adapter sleeve 1123, and the connecting groove adopts rubber to make can with reinforcing groove 1111 interference fit, in the cardboard 1122 can the embedded card groove. After the raised floor boards 111 are connected with the main runners 2 by the positioning pins, the adjacent raised floor boards 111 can be connected by the connecting members 112, so that the raised floor boards 111 are tightly connected.

As shown in fig. 1, 3 and 6, a plurality of mounting grooves 22 uniformly distributed along the length direction are formed in one surface of each adjacent main keel 2, a plurality of support rods 4 are arranged on two adjacent main keels 2, and two ends of each support rod 4 are respectively embedded into the two mounting grooves 22. The auxiliary assembly 5 comprises a fixing block 51 fixed at the lower end of the rough floor 111, a telescopic groove 511 is formed in the lower end of the fixing block 51, a telescopic rod 52 is connected in the telescopic groove 511 in a sliding mode, the telescopic rod 52 is abutted to the bottom of the telescopic groove 511 through an auxiliary spring 53, an auxiliary block 54 made of rubber is fixed at the lower end of the telescopic rod 52, and a supporting groove capable of being in interference fit with the supporting rod 4 is formed in the lower end of the auxiliary block 54.

When the rough floor 111 is connected with the main keel 2 through the positioning pin, the supporting rod 4 is embedded into the supporting groove and compresses the auxiliary spring 53, thereby the supporting rod 4 can support the middle part of the rough floor 111, when the middle part of the rough floor 111 is pressed, the fixing block 51 can be driven to move downwards and the auxiliary spring 53 can be continuously compressed, the telescopic rod 52 can be taken to move downwards after the auxiliary spring 53 can not be continuously compressed, and the telescopic rod 52 is supported by the supporting rod 4, thereby the rough floor 111 is not easy to excessively deform, further the rough floor 111 is not easy to damage, and after the pressure on the rough floor 111 is removed, the auxiliary spring 53 can help the rough floor to recover, and the service life of the rough floor 111 is further prolonged.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the design concept of the present invention should be included in the scope of the present invention.

Claims (7)

1. The utility model provides a floor structure is built in room, includes timber apron subassembly (1), its characterized in that: the wood floor component (1) is connected with a plurality of main keels (2) below, the main keel (2) below is connected with a plurality of supporting components (3), the supporting components (3) comprise upper supporting blocks (31) which are detachably and slidably connected with the main keels (2) in the length direction, lower supporting blocks (32) are detachably and slidably connected with the lower supporting blocks (31) below, the sliding direction of the lower supporting blocks (32) is perpendicular to that of the upper supporting blocks (31), sliding grooves (21) extending along the length direction are formed in the lower surface of the main keels (2), the cross sections of the sliding grooves (21) are trapezoidal, sliding blocks (312) matched with the sliding grooves (21) are arranged on the upper supporting blocks (31), first connecting grooves (311) are formed in the lower surface of the upper supporting blocks (31), the extending direction of the first connecting grooves (311) is perpendicular to the direction of the sliding grooves (21), a first connecting block (322) matched with the first connecting groove (311) is arranged on the lower supporting block (32), a second connecting groove (321) with the same size and the same extending direction as the first connecting groove (311) is formed in the lower surface of the lower supporting block (32), a buffer block (33) is arranged on the lower side of the lower supporting block (32), a second connecting block (331) matched with the first connecting groove (311) is arranged on the buffer block (33), the buffer block (33) is made of rubber materials, upper limiting blocks (34) are connected to the left side and the right side of the upper supporting block (31) in a sliding mode, an upper positioning groove (313) is formed in the upper supporting block (31), and upper positioning rods (35) connected with the two upper limiting blocks (34) are arranged in the upper positioning groove (313); the left and right sides sliding connection of lower supporting shoe (32) has lower spacing block (36), is equipped with down constant head tank (323) in lower supporting shoe (32), is equipped with lower locating lever (37) of being connected with two lower spacing blocks (36) in lower constant head tank (323), go up locating lever (35) and adopt and have magnetic material to make, first magnet (314) have all been inlayed at the upper and lower both ends of going up constant head tank (313), and lower locating lever (37) adopt and have magnetic material to make, the upper and lower both ends of lower constant head tank (323) all just have inlayed second magnet (324).

2. The floor structure of claim 1, wherein: the length of the lower supporting block (32) is smaller than that of the upper supporting block (31), the length of the buffer block (33) is the same as that of the lower supporting block (32), a gap is reserved between two adjacent lower supporting blocks (32) in the length direction of the main framework, and a gap is reserved between the adjacent buffer blocks (33).

3. The floor structure of claim 1, wherein: the left side and the right side of the lower supporting block (32) are provided with pull grooves (325), and the pull grooves (325) are L-shaped.

4. The floor structure of claim 1, wherein: a first stop block (38) is fixed at the upper end of the upper limiting block (34), and a second stop block (39) is fixed at the upper end of the lower limiting block (36).

5. The floor structure of claim 1, wherein: the wood floor component (1) comprises a base layer (11) positioned above the keel component, a waterproof film (12) is arranged above the base layer (11), a plurality of ceramic tiles (13) are embedded above the waterproof layer, the base layer (11) comprises a plurality of raised floors (111) crossing two main keels (2) and connecting pieces (112) connected with the raised floors (111), two ends of each raised floor (111) are positioned in the middle of the main keels (2) at two ends and connected with the main keels (2) through positioning pins, reinforcing grooves (1111) are formed in the front and rear ends of the front and rear sides of each raised floor (111), fixing grooves (1112) are arranged in the reinforcing grooves (1111), each connecting piece (112) comprises a reinforcing plate (1121) and a clamping plate (1122) fixed at two ends of the reinforcing plate (1121), a connecting sleeve (1123) wraps the reinforcing plate (1121) in the circumferential direction, and can be in interference fit with the reinforcing grooves (1111) by, the card board (1122) can be embedded into the card slot.

6. The floor structure of claim 5, wherein: the one side that adjacent main joist (2) are relative is equipped with a plurality of mounting grooves (22) along length direction equipartition, and two adjacent main joist (2) are equipped with a plurality of bracing pieces (4), and in two mounting grooves (22) were embedded respectively in the both ends of bracing piece (4), the below of false floor (111) was equipped with a plurality of auxiliary assembly (5), and every auxiliary assembly (5) is connected with bracing piece (4).

7. The floor structure of claim 6, wherein: the auxiliary assembly (5) comprises a fixing block (51) fixed to the lower end of the floor slab (111), a telescopic groove (511) is formed in the lower end of the fixing block (51), a telescopic rod (52) is connected to the telescopic groove (511) in a sliding mode, the telescopic rod (52) is abutted to the bottom of the telescopic groove (511) through an auxiliary spring (53), an auxiliary block (54) made of rubber is fixed to the lower end of the telescopic rod (52), and a supporting groove capable of being in interference fit with the supporting rod (4) is formed in the lower end of the auxiliary block (54).

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