CN211961491U - Chair seat - Google Patents

Abstract

The utility model discloses a seat and a seat, wherein the seat comprises an upper seat plate used for connecting a cushion, a leg rest pillow, a telescopic mechanism and a lower shell capable of accommodating the leg rest pillow, the front part of the lower shell is thinned and is sunken upwards to form a free region, the telescopic mechanism is arranged in the lower shell and is connected with the leg rest pillow, the leg rest pillow can drive the telescopic mechanism to stretch, and after the telescopic mechanism is completely folded, the leg rest pillow is accommodated in the leg rest pillow accommodating region; further provides a chair using the chair seat; the size and the shape of the foot rest pillow are matched with the foot rest pillow containing area, so that the foot rest pillow is just filled in the foot rest pillow containing area, the foot rest pillow cannot protrude out of the outer edge of the lower shell, and no obtrusive feeling exists, the purpose of hiding the foot rest pillow is achieved, and the integral attractiveness of the seat is improved; when the front part of the lower shell is integrally thinned and is upwards sunken, the formed foot rest pillow containing area is wider, the width of the foot rest pillow is wider, a user can adjust the comfortable posture, and the comfort is improved.

Description

Chair seat

Technical Field

The utility model relates to the field of seats, in particular to a seat support of a chair.

Background

In order to make people more comfortable when leaning against and lying on the seat, a foot rest pillow can be added to the seat; when a user normally sits on the seat in work, the leg rest pillow can be folded at the bottom of the seat, and when the user lies on the seat for rest, the leg rest pillow can be drawn out for the user to rest legs, so that the comfort of the seat is improved; however, most of seats with foot rest pillows on the market at present have obvious bulges at the bottoms of the seats after the foot rest pillows are folded, so that the overall attractiveness of the seats is influenced.

CN201210103878.9, a chinese utility model patent discloses an office leisure chair, which comprises a floor stand, an angle-adjusting gas spring, a foot pad frame, a seat cushion frame mounted on the upper end of the floor stand, a seat cushion mounted on the upper end of the seat cushion frame, a rotator mounted on the rear part of the seat cushion frame and pivoting back and forth, a back rest frame fixed on the rotator, and a back rest pad mounted on the back rest frame; the rotating body is provided with a left angle-adjusting spiral spring and a right angle-adjusting spiral spring respectively, one end of the angle-adjusting air spring is pivoted with the rotating body, and the other end of the angle-adjusting air spring is pivoted with the cushion frame; the foot pad frame is slidably arranged on the seat cushion frame and is lower than the seat cushion, the sliding axis of the foot pad frame is horizontal and vertical to the pivot axis of the rotating body, and the upper end of the foot pad frame is provided with a foot rest; the front end of the footrest is pivoted with the front end of the foot rest frame, and the rear part of the footrest is connected with the foot rest frame through a left foot rest and a right foot rest air springs respectively. The foot-rest pillow of the utility model is heavy and wide, the required folding space is larger, and the aesthetic property is reduced; and the bottom plate of the foot rest pillow can not be saved, thereby wasting materials and increasing the cost.

CN 201810570351.4's chinese utility model patent discloses an office chair is equipped with bracket mechanism on this office chair, sets up the holding district through the front end at the base, and bracket mechanism can accomodate and distinguish with the holding in, does not bulge the seat to through setting the guide rail in the bracket mechanism to the open form of lower extreme. The accommodating area of the utility model is provided with a left baffle and a right baffle, thus shortening the width of the footrest; the exposed guide rails in turn increase the risk of injury.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a seat of a chair, which is characterized in that the seat comprises an upper seat plate and a lower shell which are oppositely combined up and down, the front part of the lower shell is thinned from bottom to top and is sunken upwards to form a foot rest pillow containing area, a telescopic mechanism is arranged in the lower shell and is connected with a foot rest pillow, the foot rest pillow drives the telescopic mechanism to be telescopic when moving back and forth under the action of external force, and the foot rest pillow is contained in the foot rest pillow containing area after the telescopic mechanism is completely folded; the size and the shape of the foot rest pillow are matched with the containing area of the foot rest pillow, so that the containing area of the foot rest pillow is just filled with the foot rest pillow, the foot rest pillow does not have a downward sharp feeling, the purpose of hiding the foot rest pillow is achieved, and the overall attractiveness of the seat is improved.

The technical scheme of the utility model is realized like this:

a chair seat, comprising:

an upper seat plate configured to be connected to a seat cushion;

the front part of the lower shell is thinned and is sunken upwards to form a vacant area to form a foot rest pillow containing area, and the lower shell is connected below the upper seat plate;

the telescopic mechanism is arranged in the lower shell after being folded, the front end of the telescopic mechanism is connected with the leg rest pillow, and the leg rest pillow is driven to move through stretching;

and the foot rest pillow is accommodated in the foot rest pillow accommodating area after the telescopic mechanism is completely folded.

The front part of the lower shell is thinned and the area vacated by the upward recess forms a foot rest pillow containing area so that the foot rest pillow can be contained in the foot rest pillow instead of protruding out of the chair seat, and the foot rest pillow is hidden at the bottom of the chair seat when not in use.

Preferably, the whole front part of the lower shell is thinned and is sunken upwards to form a vacant area to form a foot rest pillow accommodating area. The obtained foot rest pillow has wider accommodating area, and a wider foot rest pillow can be arranged to adjust the feet and legs of a user to achieve the most comfortable foot rest posture.

Preferably, the middle part of the front part of the lower shell is thinned and is sunken upwards to form a foot rest pillow accommodating area, and the non-thinned parts of the lower shell on the left side and the right side of the foot rest pillow accommodating area form baffles. The baffle provides spacingly for accomodating the bracket pillow in bracket pillow holding area, makes the bracket pillow accomodate more easily the accuracy.

Preferably, the size and the shape of the footrest pillow are matched with the footrest pillow accommodating area, so that the footrest pillow just fills the footrest pillow accommodating area. The arrangement ensures that the foot rest pillow does not protrude out of the outer edge of the lower shell when being stored in the foot rest accommodating area, so that the pillow is not obtrusive and the attractiveness of the seat is improved.

Preferably, the front part of the lower shell is thinned upwards to form a clapboard facing the front of the chair seat and a thin plate facing the lower part of the chair seat; the foot rest pillow is accommodated in the foot rest pillow accommodating area, the partition board is attached to the rear end of the foot rest pillow, and the thin plate is attached to the upper end of the foot rest pillow. The baffle and the sheet metal separate the bracket pillow accommodation area and the internal space of the lower shell, so that the bracket pillow can be drawn out without being blocked.

Preferably, the front part of the lower shell is thinned upwards to form a clapboard facing the front of the chair seat; the telescopic mechanism is fixedly connected inside the lower shell, and the partition plate is provided with a window for the telescopic mechanism to extend out of the lower shell. When the foot rest pillow is in a furled state, the baffle blocks the foot rest pillow from continuing to move backwards, so that the limiting effect is achieved; and the partition board is provided with a window to enable the telescopic mechanism to be exposed out of the lower shell so as to achieve the purpose of connecting the foot rest pillow.

Preferably, the telescopic mechanism is a pull-out multi-section sleeve and comprises a pipe seat and a multi-section telescopic pipe connected in the pipe seat. Can realize the required telescopic effect, and has simple structure and low price.

Preferably, a telescopic mechanism is arranged in the middle of the lower shell, a window for the telescopic mechanism to extend out of the lower shell is formed in the middle of the partition plate, an installation groove for installing the telescopic mechanism is formed in the lower shell behind the window, and the pipe seat is installed in the installation groove. The cost is low by using a single telescopic mechanism; the use of the mount to secure the socket gives the socket a restraint to prevent the socket from sliding within the outer housing after disconnection.

Preferably, the two telescopic mechanisms are symmetrically arranged on the left side and the right side in the lower shell, the two windows for the telescopic mechanisms to extend out of the lower shell are symmetrically arranged on the left side and the right side of the partition plate, two mounting grooves for mounting the telescopic mechanisms are formed in the lower shell behind the windows, and the tube seats are mounted in the mounting grooves. The leg rest pillow has the advantage that the supporting capacity of the leg rest pillow can be improved by using the two telescopic mechanisms.

Preferably, the tube seat is fixedly connected with the lower shell. If the tube seat is connected with the upper seat plate, a longer connecting piece is needed, so that the connection firmness of the tube seat and the upper seat plate is influenced, and meanwhile, the telescopic tube at the front end of the tube seat is inconvenient to penetrate out of the lower shell; the tube seat is arranged in the lower shell and is fixedly connected with the lower shell, so that the cost is saved and the tube seat can be stably connected and fixed.

Preferably, the left side and the right side of the lower shell are respectively provided with a handrail mounting position, the handrail mounting positions are provided with reinforcing plates, and the reinforcing plates and the handrail mounting positions are kept relatively fixed; the pipe seat is fixedly connected with the reinforcing plate. The reinforcing plate not only plays a role of connecting the handrails, but also enables the tube seat to be fixed to the lower shell; compared with the case that the tube seat is directly connected with the lower case, the tube seat can bear larger force through the connection of the reinforcing plate and the lower case, and is not easy to fall off from the lower case.

Preferably, the two reinforcing plates are connected through the bridge plate, the tube seat is fixedly connected with the connecting handle, a through hole for the bridge plate to pass through is reserved between the connecting handle and the tube seat, two ends of the bridge plate are arranged in the through hole in a penetrating mode, the connecting handle is fixedly connected with the bridge plate, and the bridge plate is fixedly connected with the lower shell. The reinforcing plate and the bridge plate are fixedly connected with the lower shell, so that the connection firmness between the tube seat and the lower shell is improved; the connecting handle is welded on the tube seat, and compared with the method that the connecting handle is assembled with the lower shell after a plurality of supporting lugs are welded, the connecting handle has the advantages that the required welding time is reduced, the production efficiency is improved, the required strength of the lower shell is not required to be high, and the cost is reduced.

Preferably, two sections of sleeves are arranged in the tube seat, the two sections of sleeves are respectively an outer tube and an inner tube, and the inner tube, the outer tube and the tube seat are sequentially sleeved; the front end of the inner tube is connected with the foot rest pillow. Compared with the mode that only two sections of sleeves are matched in a telescopic mode, the matching of the outer pipe and the pipe seat enables the telescopic mechanism to increase extra telescopic stroke.

Adopted above-mentioned technical scheme the utility model discloses a design departure point, theory and beneficial effect are:

the utility model provides a pair of seat support compares prior art:

1. the whole front part of the lower shell is thinned and is sunken upwards to form a foot rest pillow containing area, the width of the foot rest pillow can be wider, and the use comfort is improved.

2. The size and the shape of the foot rest pillow are matched with the accommodating area of the foot rest pillow, so that the accommodating area of the foot rest pillow is just filled with the foot rest pillow, the foot rest pillow cannot protrude out of the outer edge of the lower shell, and no obtrusive feeling exists, the purpose of hiding the foot rest pillow is achieved, and the overall attractiveness of the seat is improved.

3. The telescopic mechanism is arranged in the lower shell and is not exposed, and the telescopic mechanism is connected and fixed with the lower shell through the reinforcing plate, so that the strength of the lower shell and the upper seat plate can be properly reduced, the required material strength requirement is not high, and the cost is reduced.

4. The connecting handle is welded on the tube seat, and compared with the method that the connecting handle is assembled with the lower shell after a plurality of supporting lugs are welded, the connecting handle has the advantages that the required welding time is reduced, and the production efficiency is improved.

5. The anterior attenuate of lower casing keeps wholeness, and not excision makes after the footrest is pulled out, and the sheet metal lower surface on the lower casing has the same feel with other positions, and casing sense of touch is better than the excision down, has promoted the whole feel of seat.

Drawings

Fig. 1 is a schematic perspective view of a leg rest pillow stored in a seat bottom in embodiment 1 of the present invention;

fig. 2 is a schematic perspective view of the foot rest pillow of the present invention in the use state according to embodiment 1;

fig. 3 is a schematic perspective view of a combination of a seat cushion and an upper seat plate according to embodiment 1 of the present invention;

fig. 4 is a schematic perspective view of the cushion, the upper seat plate and the lower housing of the present invention in embodiment 1;

fig. 5 is a schematic perspective view of the cushion, the upper seat plate and the lower housing of the present invention in embodiment 1;

fig. 6 is a schematic perspective view of the telescopic mechanism mounted on the lower housing according to embodiment 1 of the present invention;

fig. 7 is a schematic perspective view of the telescopic mechanism assembled with the lower housing according to embodiment 1 of the present invention;

fig. 8 is a schematic perspective view of the position of the baffle plate on the lower case according to embodiment 2 of the present invention;

fig. 9 is a side view of the lower case of the present invention in embodiment 1;

fig. 10 is a side view of the footrest in the footrest accommodating area according to embodiment 1 of the present invention;

fig. 11 is a side view of the footrest pillow in the use state according to embodiment 1 of the present invention;

fig. 12 is a schematic perspective view of a rear seat with a footrest extended in embodiment 1 according to the present invention;

fig. 13 is a schematic perspective view of a combination of a chassis and a lower housing according to embodiment 1 of the present invention;

fig. 14 is a side view of the rear seat with the footrest extended in embodiment 1 of the present invention.

The figures are numbered: an upper seat plate 1; a lower case 2; a telescoping mechanism 3; a foot rest pillow 4; a seat cushion 5; a foot rest pillow accommodation area 6; a partition 7; a thin plate 8; a window 9; a stem 10; a multi-section telescopic pipe 11; a mounting groove 12; an armrest mounting location 13; a mounting hole 14; a reinforcing plate 15; a bridge plate 16; a fixing hole 17; a connection handle 18; a perforation 19; an outer tube 20; an inner tube 21; a baffle 22; a main body portion 23; a connection plate 24; a weld 25; a seat support assembly 26; supporting legs 27; a support bar 28; a chassis 29; a chassis mounting location 30.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The specific implementation manner of the utility model is as follows:

example 1:

the definition of orientation for this embodiment is based on the description of the seat bottom or seat under normal use.

As shown in fig. 1, 2, 10 and 11, the utility model provides a chair seat, which comprises an upper seat plate 1, a lower shell 2, a telescopic mechanism 3 and a foot rest pillow 4, wherein the foot rest pillow 4 is connected with the telescopic mechanism 3, the foot rest pillow 4 is put by the pull, and the telescopic mechanism 3 extends therewith.

As shown in fig. 3-5, the upper seat plate 1 is used for connecting a seat cushion 5, and the seat cushion 5 is fixedly connected above the upper seat plate 1; the upper seat plate 1 can be a wood plate or a plastic plate.

The lower shell 2 is fixedly arranged below the upper seat plate 1 through screws; the cushion 5 is a spongy cushion. The front part of the lower shell 2 is integrally thinned and is upwards sunken to form a footrest accommodating area 6, and the footrest 4 is accommodated in the footrest accommodating area 6; since the front part of the lower shell 2 is thinned, a thin plate 8 positioned at the front part of the lower shell and a main body part 23 positioned behind the thin plate 8 are formed, the part of the front end of the main body part 23 positioned below the thin plate 8 forms a partition 7, the thickness of the main body part 23 is thicker than that of the thin plate 8, and the front part of the lower shell 2 is the part 15-25cm from the foremost end of the lower shell 2 to the rear part thereof; the partition 7 faces the front of the seat and the thin plate 8 faces the lower part of the seat. The lower shell 2 is integrally molded from plastic.

As shown in fig. 2, 5 and 9, the front part of the lower shell 2 is thinned and is depressed upwards to form a footrest accommodating area 6, and the footrest 4 is accommodated in the footrest accommodating area 6; the foot rest pillow containing area 6 is separated from the interior of the lower shell 2 by the partition plate 7 and the thin plate 8; two windows 9 for the telescopic mechanism 3 to pass through are symmetrically arranged at the left side and the right side of the clapboard 7.

The telescoping mechanism 3 is arranged in the lower shell 2, specifically, as shown in fig. 6 and 7, the telescoping mechanism 3 is a pull-out multi-section sleeve, and comprises a tube seat 10 and a multi-section telescoping tube 11 connected in the tube seat 10, a main body part 23 of the lower shell 2 behind the window 9 is respectively provided with an installation groove 12, and the tube seat 10 is arranged in the installation groove 12; a handrail mounting position 13 is formed on each of the left and right sides of the lower case 2, the handrail mounting position 13 protrudes upward from the surface of the lower case 2 and the upper end surface thereof is a horizontal surface having a mounting hole 14, a reinforcing plate 15 is provided on the handrail mounting position 13, the handrail mounting position and the reinforcing plate are fixed by bolts through the mounting holes 14, and the tube seat 10 can be fixedly connected to the reinforcing plate 15.

In order to enable the connection between the tube seat 10 and the reinforcing plates 15 to be more convenient and firm, the bridge plate 16 is connected between the reinforcing plates 15 at two sides, the bridge plate 16 and the reinforcing plates 15 are integrally formed, fixing holes 17 are formed in the bridge plate 16, the bridge plate 16 and the lower shell 2 are fixedly connected through the fixing holes 17 by bolts, at the moment, the reinforcing plates 15 at two sides of the bridge plate 16 are lapped on the handrail mounting position 13, and the bridge plate 16 is fixedly connected with the lower shell 2, so that the reinforcing plates 15 only play a role of reinforcing the handrail mounting position 13 under the condition, and the reinforcing plates 15 do not need to be connected with the handrail mounting position 13 through bolts any more; the connecting handle 18 is welded on the tube seat 10, the connecting handle 18 comprises a connecting flat plate 24, welding parts 25 extend outwards and downwards from two ends of the connecting flat plate 24, the welding parts 25 are welded on the tube seat 10, a through hole 19 for the bridge plate 16 to pass through is reserved between the connecting flat plate 24 and the tube seat 10, and the connecting handle 18 is fixedly connected on the bridge plate 16.

When the telescopic mechanism 3 is assembled on the lower shell 2, the reinforcing plates 15 on the left side and the right side respectively penetrate through the through holes 19 between the tube seats 10 on the left side and the right side and the connecting handles 18, so that the two ends of the bridge plate 16 penetrate through the through holes 19, the connecting handles 18 and the bridge plate 16 are fixedly connected through bolts, the tube seats 10 are placed in the mounting grooves 12, the head of the telescopic mechanism 3 extends out of the window 9, and finally the hole positions of the bridge plate 16 and the hole positions on the lower shell 2 are aligned and fixedly connected through bolts.

The multi-section telescopic tube 11 can be two-section sleeve tubes or three-section sleeve tubes, in this embodiment, two sections of sleeve tubes are adopted, namely an outer tube 20 and an inner tube 21, the inner tube 21 and the outer tube 20 are sequentially sleeved with the tube seat 10, and the front end of the inner tube 21 is connected with the footrest 4; the footrest pillow 4 is drawn out from the footrest pillow accommodating area 6, the inner tube 21 and the outer tube 20 are sequentially drawn out, the footrest pillow 4 is pushed back, the inner tube 21 and the outer tube 20 move towards the inside of the tube seat 10, and finally the telescopic mechanism 3 is completely contracted, the footrest pillow 4 is accommodated in the footrest pillow accommodating area 6, the upper surface of the footrest pillow 4 is attached to the thin plate 8, and the rear end of the footrest pillow 4 is attached to the partition plate 7.

As shown in fig. 12-14, the present embodiment further provides a chair comprising the chair seat and a seat support assembly 26, wherein the seat support assembly 26 is connected to the underside of the chair seat.

The seat support assembly 26 comprises a support foot 27, a support rod 28 and a chassis 29, the chassis 29 is fixedly connected with the lower shell 2 of the seat of the chair, and the upper end and the lower end of the support rod 28 are respectively connected with the chassis 29 and the support foot 27; the middle part of the lower surface of the main body part 23 of the lower shell 2 is thinned upwards to form a chassis mounting position 30 facing the lower part of the seat of the chair, and a chassis 29 is mounted on the chassis mounting position 30.

Example 2: in the present embodiment, the middle part of the front part of the lower case 2 is thinned and recessed upward, and the area left by the middle part is used as the footrest accommodating area 6.

As shown in fig. 8, the middle part of the front part of the lower shell 2 is thinned and is recessed upwards to form a foot rest pillow accommodating area 6, and the lower shell 2 on the left and right sides of the foot rest pillow accommodating area 6 forms baffles 22 for the thinned part; the size and the shape of the footrest pillow 4 are matched with the footrest pillow containing area 6, so that the footrest pillow 4 is just filled with the footrest pillow containing area 6.

Example 3: this embodiment is different from embodiment 1 in that the stem 10 is directly connected to the lower case 2.

That is, the connecting lug is welded on the tube seat 10, the part of the lower casing 2 which is matched with the connecting lug is reinforced, and then the connecting lug and the lower casing 2 are connected and fixed through a bolt.

Claims (13)

1. A chair seat, comprising:

an upper seat plate configured to be connected to a seat cushion;

the front part of the lower shell is thinned and is sunken upwards to form a vacant area to form a foot rest pillow containing area, and the lower shell is connected below the upper seat plate;

the telescopic mechanism is arranged in the lower shell after being furled, the front end of the telescopic mechanism is connected with the leg rest pillow, and the leg rest pillow drives the telescopic mechanism to stretch when moving back and forth under the action of external force;

and the foot rest pillow is accommodated in the foot rest pillow accommodating area after the telescopic mechanism is completely folded.

2. The seat of claim 1, wherein: the front part of the lower shell is integrally thinned and is sunken upwards to form a vacant area to form a foot rest accommodating area.

3. The seat of claim 1, wherein: the anterior middle part attenuate of lower casing and the region that upwards caves in and vacates forms bracket pillow holding area, the not attenuate part of lower casing of bracket pillow holding area left and right sides forms the baffle.

4. A seat base for a chair as claimed in claim 2 or claim 3, wherein: the size and the shape of the foot rest pillow are matched with the accommodating area of the foot rest pillow, so that the accommodating area of the foot rest pillow is just filled with the foot rest pillow.

5. The seat of claim 1, wherein: the front part of the lower shell is thinned upwards to form a clapboard facing the front of the chair seat and a thin plate facing the lower part of the chair seat; the foot rest pillow is accommodated in the foot rest pillow accommodating area, the partition board is attached to the rear end of the foot rest pillow, and the thin plate is attached to the upper end of the foot rest pillow.

6. The seat of claim 1, wherein: the front part of the lower shell is thinned upwards to form a clapboard facing the front of the chair seat; the telescopic mechanism is fixedly connected inside the lower shell, and the partition plate is provided with a window for the telescopic mechanism to extend out of the lower shell.

7. The seat base of claim 6, wherein: the telescopic mechanism is a drawing type multi-section sleeve and comprises a pipe seat and a multi-section telescopic pipe connected in the pipe seat.

8. The seat bottom of claim 7, wherein: the middle position of the lower shell is provided with a telescopic mechanism, the middle part of the partition plate is provided with a window for the telescopic mechanism to extend out of the lower shell, the lower shell behind the window is provided with an installation groove for installing the telescopic mechanism, and the tube seat is installed in the installation groove.

9. The seat bottom of claim 7, wherein: the left side and the right side of the lower shell are symmetrically provided with two telescopic mechanisms, the left side and the right side of the partition plate are symmetrically provided with two windows for the telescopic mechanisms to extend out of the lower shell, the lower shell behind the windows is internally provided with two mounting grooves for mounting the telescopic mechanisms, and the tube seats are mounted in the mounting grooves.

10. The seat bottom of claim 7, wherein: the tube seat is fixedly connected with the lower shell.

11. The seat bottom of claim 7, wherein: the left side and the right side of the lower shell are respectively provided with a handrail mounting position, a reinforcing plate is arranged on the handrail mounting positions, and the reinforcing plate and the handrail mounting positions are relatively fixed; the pipe seat is fixedly connected with the reinforcing plate.

12. The seat bottom of claim 11, wherein: the two reinforcing plates are connected through the bridge plate, the tube seat is fixedly connected with the connecting handle, a through hole for the bridge plate to pass through is reserved between the connecting handle and the tube seat, two ends of the bridge plate penetrate through the through hole, the connecting handle is fixedly connected with the bridge plate, and the bridge plate is fixedly connected with the lower shell.

13. The seat bottom of claim 7, wherein: two sections of sleeves are arranged in the tube seat, the two sections of sleeves are respectively an outer tube and an inner tube, and the inner tube, the outer tube and the tube seat are sequentially sleeved; the front end of the inner tube is connected with the foot rest pillow.

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