CN111720007B

CN111720007B - Quick-connecting type aluminum alloy frame with surface drainage cleaning mechanism for balcony

Info

Publication number: CN111720007B
Application number: CN202010621656.0A
Authority: CN
Inventors: 姚丙善; 袁方
Original assignee: Chongqing Huazi Decoration Engineering Co ltd
Current assignee: Chongqing Huazi Decoration Engineering Co.,Ltd.
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-12-17
Anticipated expiration: 2040-06-30
Also published as: CN111720007A

Abstract

The invention relates to the technical field of aluminum alloy frames, in particular to a quick-connecting aluminum alloy frame with a surface drainage cleaning mechanism for a balcony, which comprises a side frame and a top frame, the top end of the frame is riveted with a top frame, the bottom end of the frame is fixedly connected with a bottom frame component, the bottom frame component comprises a fixed frame and a fixed groove, and both ends of the fixing frame are riveted and fixed with the bottom end of the side frame, the fixing groove is arranged inside the fixing frame, a limit cover plate is inserted at the front end of the fixing frame, the fixing cover plate is fixed at the front end of the frame through screws, one end of the limit cover plate is abutted against the fixed cover plate, the other end of the limit cover plate is abutted against the frame, the inner wall of the fixing frame is integrally connected with a slide rail, the top end of the slide rail is connected with the connecting component in a sliding way, the upper surface fixed connection of coupling assembling has the glass frame subassembly, coupling assembling's surface mounting has the scraper blade. The push-pull cleaning assembly is arranged, and dust and other impurities in the chute can be cleaned conveniently.

Description

Quick-connecting type aluminum alloy frame with surface drainage cleaning mechanism for balcony

Technical Field

The invention relates to the technical field of aluminum alloy frames, in particular to a quick-connection type aluminum alloy frame with a surface drainage cleaning mechanism for a balcony.

Background

The aluminum alloy is an alloy which is based on aluminum and added with a certain amount of other alloying elements, is one of light metal materials, has the advantages of light weight, high strength and the like, has wide application, and is commonly used for manufacturing products such as metal tables, machine protection door frames, glass curtain wall supports, door and window frames and the like.

When the aluminum alloy frame is used for balcony windows, the aluminum alloy frame with different structures can be adopted according to different decoration designs of balconies, the most common aluminum alloy frame is manufactured into a frame by riveting an aluminum alloy edge, and the most common aluminum alloy frame is of a push-pull structure at present.

To this end, chinese patent application No.: 201610271660.2, discloses an aluminum alloy frame, its characterized in that: including the frame body, the inboard edge of frame body sets up syllable-dividing subassembly, and syllable-dividing subassembly includes sound insulating strip and casing, and sound insulating strip detachably installs in the casing. The invention has the advantages of simple structure, convenient manufacture, good sound insulation effect and strong practicability. It has improved syllable-dividing effect at frame internally mounted subassembly that gives sound insulation, however the most common problem of plug-type aluminum alloy frame is exactly that easy accumulated dust and rainwater in the spout, and the clearance is got up very trouble.

At present, a drainage hole is designed for solving the problem, so that rainwater drainage can be accelerated, but impurities such as dust in a sliding groove cannot be conveniently cleaned, and therefore a quick-connection type aluminum alloy frame with a surface drainage cleaning mechanism for a balcony is urgently needed to be designed for solving the problem.

Disclosure of Invention

The invention aims to provide a quick-connecting type aluminum alloy frame with a surface drainage cleaning mechanism for a balcony, which aims to solve the problem that impurities such as dust in a sliding chute cannot be conveniently cleaned in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a quick-connecting aluminum alloy frame with a surface drainage cleaning mechanism for a balcony comprises a frame and a top frame, wherein the top end of the frame is riveted with the top frame, the bottom end of the frame is fixedly connected with a bottom frame component, the bottom frame component comprises a fixing frame and a fixing groove, two ends of the fixing frame are riveted and fixed with the bottom end of the frame, the fixing groove is arranged in the fixing frame, a limiting cover plate is inserted at the front end of the fixing frame, the front end of the frame is fixedly provided with the fixing cover plate through screws, one end of the limiting cover plate is abutted against the fixing cover plate, the other end of the limiting cover plate is abutted against the frame, a sliding rail is integrally connected on the inner wall of the fixing frame, the top end of the sliding rail is slidably connected with a connecting assembly, the upper surface of the connecting assembly is fixedly connected with a glass frame component, the outer surface of the connecting assembly is fixedly provided with a scraper, and the bottom of the scraper is wrapped with a rubber strip, one side swing joint that coupling assembling was kept away from to the rubber strip has the blowdown subassembly, the blowdown subassembly includes the baffle frame, the one end of baffle frame pierces through the surface of fixed frame, and the other end integration of baffle frame is connected with the draw runner, one side surface that the draw runner was kept away from to the baffle frame runs through and is provided with the guide arm, the one end that the baffle frame was kept away from to the guide arm is fixed with the inner wall welded fastening of frame, the surface cover of guide arm is equipped with the second spring, the lower surface of baffle frame is provided with logical groove, and leads to the lower surface that the groove pierces through fixed frame, the below that leads to the groove is provided with the ramp, the both ends of ramp all in the inner wall welded fastening of fixed slot, the rear end surface of fixed frame pierces through and has seted up the blowhole.

Preferably, the rubber plug is embedded into the front end of the fixed cover plate, and the front end of the rubber plug is flush with the outer surface of the fixed cover plate.

Preferably, coupling assembling includes the slide, the bottom and the upper surface laminating that is fixed with the pulley of slide, the bottom and the slide rail of pulley, the slide passes through pulley and slide rail sliding connection.

Preferably, the seal groove has been seted up to the upper surface of slide, the quantity of seal groove is two sets of, and is two sets of both ends are arranged around the seal groove is the slide, the glass frame subassembly includes outer frame body, and the lower surface of outer frame body is embedded to have the sealing strip, sealing strip and seal groove block.

Preferably, a connecting shaft is fixedly inserted into the upper surface of the sliding seat, a sleeve is rotatably connected to the top end of the connecting shaft, and the sleeve is fixedly inserted into the inner side of the outer frame body.

Preferably, the upper surface of slide pierces through and has seted up the fixed orifices, the quantity of fixed orifices is two sets of, and is two sets of the fixed orifices is connecting axle central symmetry and arranges, the inboard of fixed orifices is inserted and is equipped with the spacer pin, and the top and the outer frame body telescopic connection of spacer pin, the outer frame body passes through the spacer pin and is connected fixedly with the slide.

Preferably, the top of spacer pin closes soon and is connected with connecting screw, the upper surface of outer frame body is run through on connecting screw's top, connecting screw's surface cover is equipped with first spring, the bottom of first spring and the upper surface butt of spacer pin, and the top of first spring and the inner wall butt of outer frame body.

Preferably, the top of connecting screw rod is passed through the screw fixation and is had the connecting rod, and the both ends of connecting rod are connected fixedly with two sets of connecting screw rod respectively, the guide slot has all been seted up to the upper and lower both ends surface of outer frame body, there is the enhancement strip inboard through pivot sliding connection, the groove of accomodating has been seted up to the upper surface of slide, the one end that the outer frame body was kept away from to the enhancement strip is passed through the articulated shaft and is connected with the upper surface rotation in accomodating the groove.

Preferably, the number of the reinforcing strips is two, and the two groups of reinforcing strips are arranged at the front end and the rear end of the sliding seat in a staggered mode.

Compared with the prior art, the invention has the beneficial effects that: this connect formula aluminum alloy frame soon for balcony with clean mechanism of surface drainage has the clean subassembly of push-and-pull, is convenient for clear up debris such as dust in the spout.

Install the scraper blade through the one end bottom that is close to the frame at the slide, and there is the rubber strip at the bottom parcel of scraper blade, make the slide when the horizontal slip, can drive the scraper blade horizontal slip on the slide rail, make the rubber strip promote debris such as dust on slide rail and the fixed frame inner wall to the position of frame, when being close to the frame, the scraper blade can push up the slide bar and drive the baffle frame and contract to the frame in, make the slide rail can expose, debris such as dust can fall on the ramp through leading to the groove, discharge through the blowhole at last, when moist in the fixed frame, clean effect is better, and when the slide was kept away from to the slide, the baffle frame can resume the normal position and cover on leading to the groove, avoid leading to the groove to expose always and cause the deposition to block up seriously.

Drawings

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

FIG. 2 is an expanded view of the glass frame assembly of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic cross-sectional side view of the structure at A-A in FIG. 2 according to the present invention;

FIG. 4 is a schematic top view of the connecting assembly of FIG. 1 according to the present invention;

FIG. 5 is a schematic, partially elevational, cross-sectional view of the connecting assembly and bezel assembly of FIG. 1 in accordance with the present invention;

FIG. 6 is a partial cross-sectional view of the connection between the frame and the bottom frame assembly of FIG. 1;

fig. 7 is a partial side cross-sectional view of the bottom frame assembly shown in fig. 1 according to the present invention.

In the figure: 1. a frame; 2. a top frame; 3. a bottom frame assembly; 301. a fixing frame; 302. a limiting cover plate; 303. fixing the cover plate; 304. fixing grooves; 305. a slide rail; 4. a connecting assembly; 401. a slide base; 402. a sealing groove; 403. a receiving groove; 404. a fixing hole; 405. a connecting shaft; 5. a bezel assembly; 501. an outer frame body; 502. a sealing strip; 503. a reinforcing strip; 504. a guide groove; 505. a spacing pin; 506. a first spring; 507. connecting a screw rod; 508. a connecting rod; 509. a sleeve; 6. a blowdown assembly; 601. a partition plate frame; 602. a slide bar; 603. a guide bar; 604. a second spring; 605. a through groove; 606. a ramp plate; 607. a sewage draining hole; 7. a squeegee; 71. a rubber strip.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, an embodiment of the present invention is shown: a quick-connecting aluminum alloy frame with a surface drainage cleaning mechanism for a balcony comprises a frame 1 and a top frame 2, wherein the top end of the frame 1 is riveted with the top frame 2, the bottom end of the frame 1 is fixedly connected with a bottom frame component 3, the bottom frame component 3 comprises a fixed frame 301 and a fixed groove 304, two ends of the fixed frame 301 are riveted and fixed with the bottom end of the frame 1, the fixed groove 304 is arranged inside the fixed frame 301, a limit cover plate 302 is inserted at the front end of the fixed frame 301, a fixed cover plate 303 is fixed at the front end of the frame 1 through screws, one end of the limit cover plate 302 is abutted with the fixed cover plate 303, the other end of the limit cover plate 302 is abutted with the frame 1, a slide rail 305 is integrally connected on the inner wall of the fixed frame 301, the top end of the slide rail 305 is slidably connected with a connecting component 4, a glass frame component 5 is fixedly connected on the upper surface of the connecting component 4, and a scraper 7 is fixed on the outer surface of the connecting component 4, the bottom parcel of scraper blade 7 has rubber strip 71, and rubber strip 71 is the rubber material, as shown in fig. 7, and the inner wall of rubber strip 71 and the inner wall of fixed frame 301 and the surface of slide rail 305 closely laminate, make scraper blade 7 slide in fixed frame 301 time, scraper blade 7 can drive the inner wall of the fixed frame 301 of rubber strip 71 clearance.

One side swing joint that rubber strip 71 kept away from coupling assembling 4 has blowdown subassembly 6, blowdown subassembly 6 includes baffle frame 601, the outer surface of fixed frame 301 is penetrated to the one end of baffle frame 601, and the other end integration of baffle frame 601 is connected with draw runner 602, the one side outer surface that baffle frame 601 kept away from draw runner 602 runs through and is provided with guide arm 603, the one end that baffle frame 601 was kept away from to guide arm 603 is fixed with the inner wall welded connection of frame 1, the outer surface cover of guide arm 603 is equipped with second spring 604, second spring 604 plays and provides the effect of elasticity for baffle frame 601, make baffle frame 601 when no external force application, can remain the state as shown in fig. 6 throughout, make baffle frame 601 cover on logical groove 605.

The lower surface of the partition plate frame 601 is provided with a through groove 605, the through groove 605 penetrates through the lower surface of the fixing frame 301, a slope plate 606 is arranged below the through groove 605, two ends of the slope plate 606 are welded and fixed on the inner wall of the fixing groove 304, the outer surface of the rear end of the fixing frame 301 penetrates through a sewage discharge hole 607, and dust and sundries falling on the slope plate 606 can be discharged through the sewage discharge hole 607.

In one embodiment, a rubber plug is embedded in the front end of the fixed cover plate 303, the front end of the rubber plug is flush with the outer surface of the fixed cover plate 303, and the rubber plug can block the screw hole of the fixed cover plate 303, so that the surface of the fixed cover plate 303 is more attractive.

In one embodiment, the connecting assembly 4 includes a sliding base 401, a pulley is fixed to a bottom of the sliding base 401, a bottom of the pulley is attached to an upper surface of the sliding rail 305, and the sliding base 401 is slidably connected to the sliding rail 305 through the pulley, so that the sliding base 401 slides on the sliding rail 305 more smoothly.

In one of them embodiment, seal groove 402 has been seted up to the upper surface of slide 401, and the quantity of seal groove 402 is two sets of, and two sets of seal grooves 402 are both ends around slide 401 and arrange, and glass frame subassembly 5 includes outer frame body 501, and outer frame body 501's lower surface is embedded to have sealing strip 502, and sealing strip 502 and seal groove 402 block contradict through the inner wall of sealing strip 502 with seal groove 402, improve the leakproofness of outer frame body 501 and slide 401 junction.

In one of the embodiments, the upper surface of the sliding seat 401 is inserted and fixed with the connecting shaft 405, the top end of the connecting shaft 405 is rotatably connected with the sleeve 509, the sleeve 509 is inserted and fixed on the inner side of the outer frame body 501, and the connecting shaft 405 and the sleeve 509 are rotatably connected, so that the outer frame body 501 can be rotated on the sliding seat 401 to adjust the angle, the glass on the outer frame body 501 is cleaned more conveniently, and the space in the frame can be exposed to the maximum.

In one embodiment, the upper surface of the sliding base 401 is provided with two sets of fixing holes 404, the two sets of fixing holes 404 are arranged in a central symmetry manner through a connecting shaft 405, a limiting pin 505 is inserted into the inner side of the fixing hole 404, the top end of the limiting pin 505 is telescopically connected with the outer frame 501, the outer frame 501 is fixedly connected with the sliding base 401 through the limiting pin 505, as shown in fig. 5, the outer frame 501 and the sliding base 401 can be fixedly connected through the insertion of the limiting pin 505 and the fixing hole 404, the outer surface of the limiting pin 505 is tightly attached to the inner wall of the fixing hole 404, and the fixing stability is improved.

In one embodiment, the top end of the limit pin 505 is screwed and connected with a connection screw 507, the top end of the connection screw 507 penetrates through the upper surface of the outer frame 501, the outer surface of the connection screw 507 is sleeved with a first spring 506, the bottom end of the first spring 506 abuts against the upper surface of the limit pin 505, the top end of the first spring 506 abuts against the inner wall of the outer frame 501, and the first spring 506 plays a role of providing elasticity for the limit pin 505, so that the limit pin 505 can be always kept in the state shown in fig. 5 when no external force is applied, and the limit pin 505 and the fixing hole 404 are tightly inserted and fixed.

In one embodiment, a connecting rod 508 is fixed to the top end of the connecting screw 507 through a screw, two ends of the connecting rod 508 are respectively connected and fixed to two groups of connecting screws 507, guide grooves 504 are formed in the outer surfaces of the upper end and the lower end of the outer frame 501, a reinforcing bar 503 is connected to the inner side of each guide groove 504 in a sliding manner through a rotating shaft, a storage groove 403 is formed in the upper surface of the sliding base 401, one end, away from the outer frame 501, of the reinforcing bar 503 is rotatably connected to the upper surface of the storage groove 403 through a hinge shaft, and two ends of the reinforcing bar 503 are respectively connected to the guide grooves 504 and the storage groove 403, so that the reinforcing bar 503 can support the outer frame 501, and the stability of the outer frame 501 after being unfolded is improved.

In one embodiment, the number of the reinforcing bars 503 is two, and the two groups of reinforcing bars 503 are staggered at the front and rear ends of the sliding seat 401, so as to further improve the stability of the outer frame 501 after being unfolded.

The working principle is as follows: during the use, with two sets of frames 1, top frame 2 and fixed frame 301 pass through expansion bolts to be fixed on the balcony wall, glue through glass and fix glass in outer frame body 501 after that, slide through coupling assembling 4 and top frame 2's inner wall earlier with outer frame body 501's top, pass through coupling assembling 4 and fixed frame 301 sliding connection with outer frame body 501's bottom again, then insert the front end of establishing fixed frame 301 with spacing apron 302, it is spacing to slide 401, fix apron 303 through the screw fixation on frame 1 spacing apron 302, can accomplish this installation of this quick-connect aluminum alloy frame for balcony with clean mechanism of surface drainage.

When the outer frame body 501 is pushed and pulled, the outer frame body 501 can drive the sliding seat 401 to slide left and right on the sliding rail 305, the sliding seat 401 drives the scraper 7 to slide left and right on the sliding rail 305, the rubber strip 71 can push impurities such as dust on the inner walls of the sliding rail 305 and the fixed frame 301 to the position of the frame 1, when the sliding seat is close to the frame 1, the scraper 7 can push the sliding strip 602 to drive the partition plate frame 601 to retract into the frame 1, the sliding rail 305 can be exposed, the impurities such as dust can fall onto the slope plate 606 through the through groove 605, finally, the impurities are discharged through the blow-off hole 607, when the fixed frame 301 is wet, the cleaning effect is better, and when the sliding seat 401 is far away from the sliding strip 602, the partition plate frame 601 can restore to the original position to cover on the through groove 605, and the serious blockage caused by the fact that the through groove 605 is exposed all the time.

Traditional plug-type mode of windowing, can the single open a set of outer frame body 501, when needing to clear up the glass on the outer frame body 501, glass can directly be cleared up by indoor one side, glass by outdoor one side when clearing up, only need upwards stimulate connecting rod 508 and drive connecting screw 507 and rise, can make connecting screw 507 drive spacer pin 505 keep away from fixed orifices 404, can remove outer frame body 501's spacing, make outer frame body 501 can rotate on slide 401, be the cross arrangement through rotating outer frame body 501 and slide 401, make glass lean on outdoor one side also can be convenient clear up, and through this kind of mode of windowing, can reach the biggest ventilation effect.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a balcony is with connecing formula aluminum alloy frame soon with clean mechanism of surface drainage, includes frame (1) and top frame (2), its characterized in that: the top end of the frame (1) is riveted with a top frame (2), the bottom end of the frame (1) is fixedly connected with a bottom frame component (3), the bottom frame component (3) comprises a fixed frame (301) and a fixed groove (304), the two ends of the fixed frame (301) are fixedly riveted with the bottom end of the frame (1), the fixed groove (304) is arranged inside the fixed frame (301), a limit cover plate (302) is inserted at the front end of the fixed frame (301), a fixed cover plate (303) is fixed at the front end of the frame (1) through screws, one end of the limit cover plate (302) is abutted against the fixed cover plate (303), the other end of the limit cover plate (302) is abutted against the frame (1), a sliding rail (305) is integrally connected on the inner wall of the fixed frame (301), the top end of the sliding rail (305) is slidably connected with a connecting component (4), and the upper surface of the connecting component (4) is fixedly connected with a glass frame component (5), the outer fixed surface of coupling assembling (4) has scraper blade (7), the bottom parcel of scraper blade (7) has rubber strip (71), one side swing joint that coupling assembling (4) was kept away from in rubber strip (71) has blowdown subassembly (6), blowdown subassembly (6) include baffle frame (601), the one end of baffle frame (601) pierces through the surface of fixed frame (301), and the other end integration of baffle frame (601) is connected with draw runner (602), one side surface that the draw runner (602) was kept away from in baffle frame (601) runs through and is provided with guide arm (603), the one end that baffle frame (601) was kept away from in guide arm (603) is fixed with the inner wall welded of frame (1), the outer surface cover of guide arm (603) is equipped with second spring (604), the lower surface of baffle frame (601) is provided with logical groove (605), and leads to groove (605) and pierces through the lower surface of fixed frame (301), a slope plate (606) is arranged below the through groove (605), two ends of the slope plate (606) are welded and fixed on the inner wall of the fixing groove (304), and a sewage discharge hole (607) is formed in the outer surface of the rear end of the fixing frame (301) in a penetrating mode.

2. The quick-connect aluminum alloy frame for balcony having the surface drainage cleaning mechanism as claimed in claim 1, wherein: the rubber stopper is embedded into the front end of the fixed cover plate (303), and the front end of the rubber stopper is flush with the outer surface of the fixed cover plate (303).

3. The quick-connect aluminum alloy frame for balcony having the surface drainage cleaning mechanism as claimed in claim 1, wherein: coupling assembling (4) include slide (401), the bottom of slide (401) with be fixed with the pulley, the bottom of pulley and the upper surface laminating of slide rail (305), slide (401) are through pulley and slide rail (305) sliding connection.

4. The quick-connect aluminum alloy frame for balcony having the surface drainage cleaning mechanism as claimed in claim 3, wherein: seal groove (402) have been seted up to the upper surface of slide (401), the quantity of seal groove (402) is two sets of, and is two sets of both ends are arranged around seal groove (402) is slide (401), glass frame subassembly (5) include outer frame body (501), and the lower surface of outer frame body (501) is embedded to have sealing strip (502), sealing strip (502) and seal groove (402) block.

5. The quick-connect aluminum alloy frame for balcony having the surface drainage cleaning mechanism as claimed in claim 4, wherein: the upper surface of slide (401) is inserted and is fixed with connecting axle (405), the top of connecting axle (405) is rotated and is connected with sleeve (509), and sleeve (509) insert and establish the inboard of being fixed in outer frame body (501).

6. The quick-connect aluminum alloy frame for balcony having the surface drainage cleaning mechanism as claimed in claim 5, wherein: the upper surface of slide (401) pierces through and has seted up fixed orifices (404), the quantity of fixed orifices (404) is two sets of, and is two sets of fixed orifices (404) are connecting axle (405) centrosymmetric and arrange, the inboard of fixed orifices (404) is inserted and is equipped with spacer pin (505), and the top and outer frame body (501) telescopic connection of spacer pin (505), outer frame body (501) are connected fixedly through spacer pin (505) and slide (401).

7. The quick-connect aluminum alloy frame for balcony having the surface drainage cleaning mechanism as claimed in claim 6, wherein: the top of spacer pin (505) closes soon and is connected with connecting screw (507), the upper surface of outer frame body (501) is run through on the top of connecting screw (507), the surface cover of connecting screw (507) is equipped with first spring (506), the bottom of first spring (506) and the upper surface butt of spacer pin (505), and the top of first spring (506) and the inner wall butt of outer frame body (501).

8. The quick-connect aluminum alloy frame for balcony having the surface drainage cleaning mechanism as claimed in claim 7, wherein: the top of connecting screw rod (507) is passed through the screw fixation and is had connecting rod (508), and the both ends of connecting rod (508) are connected fixedly with two sets of connecting screw rod (507) respectively, guide slot (504) have all been seted up to the upper and lower both ends surface of outer frame body (501), there is enhancement strip (503) inboard through pivot sliding connection of guide slot (504), the upper surface of slide (401) has been seted up and has been accomodate groove (403), the one end that outer frame body (501) was kept away from in enhancement strip (503) is passed through the articulated shaft and is connected with the upper surface rotation of accomodating groove (403).

9. The quick-connect aluminum alloy frame for balcony having surface drainage cleaning mechanism of claim 8, wherein: the number of the reinforcing strips (503) is two, and the two groups of reinforcing strips (503) are arranged at the front end and the rear end of the sliding seat (401) in a staggered mode.