CN210144225U

CN210144225U - Self-service seat

Info

Publication number: CN210144225U
Application number: CN201920718066.2U
Authority: CN
Inventors: 谢佳颖
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-03-17
Anticipated expiration: 2029-05-20

Abstract

The utility model discloses a self-service seat, the seat front end is connected with the support rotation, be equipped with the hydraulic means that is used for promoting the seat upset between support and seat, still be equipped with the booster mechanism who supplies oil for hydraulic means and be used for the pressure release and the stop gear of fixed lifting seat, booster mechanism, stop gear and hydraulic means linkage use, booster mechanism provides seat lifting power for hydraulic means when stop gear blocks, when the seat returns, stop gear withdraws the block to hydraulic means second through-hole, high-pressure hydraulic oil overflows to the oil return chamber through the second through-hole thereby carry out the pressure release; booster mechanism and stop gear are mechanical type control in this scheme, compare electric power operation, and the old man group uses changes the operation, supplies the oil pipe and returns the setting that sets up check valve and elastic component on the oil pipe for the seat lifting is more stable, thereby the old man uses also safer.

Description

Self-service seat

Technical Field

The utility model relates to a seat, in particular to self-service seat that is fit for old person to use.

Background

The aging of population is a problem faced by every country, and at present, the aging of population in China is also in a continuously increasing trend, so that the market of articles for the old is huge, wherein the sofa seat is deeply loved by the old due to the characteristics of lightness and comfort. The existing sofa seat comprises a sofa seat and a backrest connected with the sofa seat, wherein handrails can be arranged on two sides of the sofa seat, the sofa seat has the functions of 'seat' and 'chair', the requirement of comfort is met, but the sofa seat and the backrest adopt a completely fixed mode, a plurality of old people take the way due to the old, the lower limb strength is declined, the control capability is weakened and other factors, the old people who look after the sofa seat are difficult to get up, the old people who look after the sofa seat can be supported by the old people, but the old people who are alone or the old people can trouble alone in the time, the old people can not get up all the time, and the sofa seat is isolated and free of aid.

Chinese patent document publication No. CN207784759U discloses an electric power-assisted sofa seat, seat board on seat frame and the hinged seat frame, the seat board is articulated with the back, be equipped with first electric putter in the seat frame, battery and make the back keep the back pull rod of former gesture upward movement to one side when the seat board upwards overturns, the back lower part is equipped with the back engaging lug, back pull rod one end is articulated with corresponding back chain engaging lug, first electric putter's push rod articulates on the seat board, electric power-assisted sofa seat still including controlling first electric putter's the panel of controlling. Inconvenient old person of legs and feet controls first electric putter through controlling the panel, and first electric putter's push rod extension promotes the bedplate and upwards overturns, and the back keeps former gesture upward movement to one side under the effect of back pull rod simultaneously, and the bedplate upwards overturns and promotes the slow upward movement of buttock to finally help old person to stand up, thereby effectively solved the sofa seat among the prior art to the inconvenient old person of legs and feet, be difficult to the problem of standing up from it.

The pure electric power assistance has the advantages of: environmental protection, energy-conservation, laborsaving etc. but also have its originally to economize not enough, for example locking structure conventional settings causes the seat to lift up the time locking unstable to lead to the use security to reduce, in addition, it still is provided with the manual control panel of high-end, and we know that most old man is few to electronic product universal contact, and in addition forget its children and want to teach and have very big difficulty, consequently, need a material object control structure, make things convenient for old man's operation.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model aims at providing a take self-service seat of control structure in kind solves current seat locking structure unstability, the not high scheduling problem of old man group operational difficulty, security.

In order to realize the purpose, the utility model discloses the technical scheme who takes is:

a self-service seat comprises a support and a seat, wherein the front end of the seat is rotatably connected with the support, and a hydraulic device for pushing the seat to overturn is arranged between the support and the seat; the device also comprises a supercharging mechanism used for supplying oil and supercharging for the hydraulic device;

the supercharging mechanism comprises a second connecting rod, a fourth connecting rod, an ejector rod, an oil cylinder, an oil supply pipe and an oil return pipe, wherein the second connecting rod is fixed on the support through a support body, two ends of the fourth connecting rod are hinged to the second connecting rod and the ejector rod respectively, the other end of the ejector rod is arranged in the oil cylinder, the second connecting rod can axially move in the oil cylinder to form compression on hydraulic oil when acting, one end of the oil supply pipe is communicated with the oil cylinder, the other end of the oil return pipe is communicated with the hydraulic device, one end of the oil return pipe is communicated with the oil cylinder, the other end of the oil return pipe is communicated with the hydraulic device, a first one-way valve is arranged on the oil supply pipe, the opening direction of the first one-way valve is from the oil cylinder to the.

Further, foretell self-service seat, hydraulic means includes a lower section of thick bamboo, goes up a section of thick bamboo and sleeve, go up a section of thick bamboo outer wall and a lower section of thick bamboo inner wall laminating for go up a section of thick bamboo axial displacement under in can, and go up a section of thick bamboo apart from the bottom plate near-end of a lower section of thick bamboo and form down and put the oil pocket down between a section of thick bamboo, go up a section of thick bamboo other end and be fixed in the seat, a lower section of thick bamboo is fixed in the sleeve with the axle center, and forms sealed oil return chamber between sleeve and a lower section of thick bamboo, telescopic bottom plate is provided with the oil gallery that link up in oil return chamber part, the bottom plate of sleeve and a lower section of thick bamboo is equipped with the oil feed hole that link up the two in putting the oil.

Further, in the self-service seat, one end of the oil supply pipe is communicated with the oil cylinder, the other end of the oil supply pipe is communicated with the oil supply hole, one end of the oil return pipe is communicated with the oil cylinder, the other end of the oil return pipe is communicated with the oil return hole, the oil supply pipe is provided with a first one-way valve, the opening direction of the first one-way valve is from the oil cylinder to the oil supply hole, the oil return pipe is provided with a second one-way valve, and the opening direction of the second one-way.

Furthermore, foretell self-service seat still includes the stop gear who is used for the lifting seat and is used for the hydraulic means pressure release, stop gear includes first connecting rod, second connecting rod, third connecting rod and elastic component, and wherein first connecting rod passes through the support body to be fixed on the support, elastic component one end is fixed on first connecting rod, and other end detachable fixes on the support, and first connecting rod both ends are articulated with first connecting rod and second connecting rod respectively, and the other end of second connecting rod is articulated with the one end of third connecting rod, and the other end of third connecting rod stretches into in the first through-hole and can stretch into in the second through-hole and form the opposition oil pocket and return oil chamber's sealed when the action.

Further, in the self-service seat, the oil supply pipe is further provided with a pressure cylinder.

Further, foretell self-service seat, be equipped with the gib hand on the support, the free end of elastic component with the gib hand is detachable fixed.

Further, in the self-service seat, the elastic member is a pressure spring.

Compared with the prior art, the beneficial effects of the utility model reside in that: the support front end is equipped with booster mechanism and stop gear, booster mechanism is used for promoting hydraulic means, thereby realize the lifting seat, stop gear is used for when hydraulic means treats the lifting seat, realize the sealed of opposition oil pocket in its third connecting rod cunning to the second through-hole, thereby prevent that hydraulic oil from overflowing to the oil return intracavity through the second through-hole and arouse the pressure release of lifting process, thereby improve device stability and security, furthermore, only need pedal booster mechanism's second connecting rod to carry out the pressure boost during operation, supply the hydraulic oil in the hydro-cylinder into through supplying the oil pipe and put the oil pocket, realize the jack-up to hydraulic means upper barrel, it realizes the shutoff and opening to the second through-hole to assist with stop gear again, thereby realize steady voltage and pressure release's purpose, booster mechanism and stop gear are the entity structure, compare electron manual old man's group's operation more, the simple operation nature has been improved.

Drawings

FIG. 1 is a schematic structural view of the self-service seat of the present invention;

FIG. 2 is a front view of the hydraulic device;

FIG. 3 is a cross-sectional view taken along the plane A-A in FIG. 2;

FIG. 4 is an isometric view of the hydraulic device;

fig. 5 is a cross-sectional view taken along the plane D-D of fig. 2.

Reference numerals in the drawings of the specification include: the hydraulic device comprises a support 1, a seat 2, a hydraulic device 3, a pressurization mechanism 4, a limiting mechanism 5, a first one-way valve 6, a second one-way valve 7, a coupler 8, an elastic part 9, a lower cylinder 30, a second through hole 30a, an upper cylinder 31, a sleeve 32, an oil return cavity 32a, a first through hole 32b, an oil return hole 32c, an oil storage cavity 33, an oil supply hole 33a, a second link rod 40, a fourth link rod 41, a top rod 42, an oil cylinder 43, a pressurization cylinder 44, an oil supply pipe 45, an oil return pipe 46, a first link rod 50, a first link rod 51, a second link rod 52 and a third link rod 53.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1: refer to FIGS. 1 to 5

A self-service seat comprises a support 1 and a seat 2, wherein the front end of the seat 2 is rotatably connected with the support 1, and a hydraulic device 3 for pushing the seat 2 to overturn is arranged between the support 1 and the seat 2; a supercharging mechanism 4 for supplying oil and supercharging the hydraulic device 3 is also arranged;

the supercharging mechanism 4 comprises a second side link 40, a fourth connecting rod 41, a top rod 42, an oil cylinder 43, an oil supply pipe 45 and an oil return pipe 46, wherein the second side link 40 is fixed on the support 1 through a frame body, two ends of the fourth connecting rod 41 are respectively hinged with the second side link 40 and the top rod 42, the other end of the top rod 42 is arranged in the oil cylinder 43 and can axially move in the oil cylinder 43 to compress hydraulic oil during action, one end of the oil supply pipe 45 is communicated with the oil cylinder 43, the other end of the oil supply pipe is communicated with the hydraulic device 3, one end of the oil return pipe 46 is communicated with the oil cylinder 43, the other end of the oil return pipe 46 is communicated with the hydraulic device 3, the oil supply pipe 45 is provided with a first one-way valve 6, the opening direction of the first one-way valve 6 is from the oil cylinder 43 to the hydraulic device 3, the oil return pipe 46.

When the old people with inconvenient legs and feet need to get up on the seat, the old people can pedal the second side link rod 40, the supercharging mechanism 4 provides rising extra power for the hydraulic device 3, and the effect that the old people get up on the seat quickly and stably can be achieved.

Example 2: with reference to FIGS. 4 and 5

Compared with the embodiment 1, the difference is that the hydraulic device 3 includes a lower tube 30, an upper tube 31 and a sleeve 32, the outer wall of the upper tube 31 is attached to the inner wall of the lower tube 30, so that the upper tube 31 can move axially in the lower tube 30, a oil containing cavity 33 is formed between the near end of the upper tube 31, which is away from the bottom plate of the lower tube 30, and the lower tube 30, the other end of the upper tube 31 is fixed on the seat 2, the lower tube 30 is coaxially fixed in the sleeve 32, a sealed oil return cavity 32a is formed between the sleeve 32 and the lower tube 30, a through oil return hole 32c is formed in the bottom plate of the sleeve 32 at the part of the oil return cavity 32a, an oil supply hole 33a penetrating through the sleeve 32 and the bottom plate of the lower tube 30 is formed in the oil containing cavity 33, a first through hole 32b penetrating through one side is formed in the sleeve 32, and a second through hole 30a penetrating the same side; one end of the oil supply pipe 45 is communicated with the oil cylinder 43, the other end of the oil supply pipe is communicated with the oil supply hole 33a, one end of the oil return pipe 46 is communicated with the oil cylinder 43, the other end of the oil return pipe is communicated with the oil return hole 32c, the oil supply pipe 45 is provided with a first one-way valve 6, the opening direction of the first one-way valve 6 is from the oil cylinder 43 to the oil supply hole 33a, the oil return pipe 46 is provided with a second one-way valve 7, and the opening direction of the second one-way valve 7 is from; this arrangement makes the pressurizing mechanism 4 easier to install and provides a more stable pressure to the hydraulic device 3.

Example 3: refer to FIGS. 1 to 5

The embodiment provides a self-service seat, which comprises a support 1 and a seat 2, wherein the front end of the seat 2 is rotatably connected with the support 1, and a hydraulic device 3 for pushing the seat 2 to overturn is arranged between the support 1 and the seat 2; the hydraulic device 3 mainly comprises a lower tube 30, an upper tube 31 and a sleeve 32, wherein the outer wall of the upper tube 31 is attached to the inner wall of the lower tube 30, so that the upper tube 31 can move axially in the lower tube 30, an oil chamber 33 is formed between the proximal side of the bottom plate of the upper tube 31 from the lower tube 30 and the lower tube 30, and the other end of the upper tube 31 is fixed at the bottom of the seat 2; in addition, the lower tube 30 is coaxially fixed in the sleeve 32, a sealed oil return cavity 32a is formed between the sleeve 32 and the lower tube 30, a through oil return hole 32c is formed in the oil return cavity 32a part of the bottom plate of the sleeve 32, an oil supply hole 33a is formed in the oil containing cavity 33 part of the bottom plate of the sleeve 32 and the bottom plate of the lower tube 30, a first through hole 32b is formed in the sleeve 32, one side of the first through hole is through, and a second through hole 30a is formed in the same position as the first through hole 32b in the lower tube 30;

the device also comprises a supercharging mechanism 4 and a limiting mechanism 5;

the limiting mechanism 5 mainly comprises a first connecting rod 50, a first connecting rod 51, a second connecting rod 52, a third connecting rod 53 and an elastic part 9, wherein the first connecting rod 50 is fixed on the support 1 through a frame body, one end of the elastic part 9 is fixed on the first connecting rod 50, the other end of the elastic part is detachably fixed on the support 1, two ends of the first connecting rod 51 are respectively hinged with the first connecting rod 50 and the second connecting rod 52, the other end of the second connecting rod 52 is hinged with one end of the third connecting rod 53, and the other end of the third connecting rod 53 extends into the first through hole 32b and can extend into the second through hole 30a during action to form sealing of the opposite oil cavity 33 and the oil return cavity 32 a;

the supercharging mechanism 4 mainly comprises a second side link 40, a fourth connecting rod 41, a top rod 42, an oil cylinder 43, an oil supply pipe 45 and an oil return pipe 46, wherein the second side link 40 is fixed on the support 1 through a frame body, two ends of the fourth connecting rod 41 are respectively hinged with the second side link 40 and the top rod 42, the other end of the top rod 42 is arranged in the oil cylinder 43 and can axially move in the oil cylinder 43 to compress hydraulic oil during action, one end of the oil supply pipe 45 is communicated with the oil cylinder 43, the other end of the oil supply pipe is communicated with the oil supply hole 33a, one end of the oil return pipe 46 is communicated with the oil cylinder 43, the other end of the oil return pipe 46 is communicated with the oil return hole 32c, the oil supply pipe 45 is provided with a first one-way valve 6, the opening direction of the first one-way valve 6 is from the oil cylinder 43 to an oil supply port, the oil return pipe 46. Wherein the first side link 50 and the second side link 40 are provided in a pedal shape.

The use method and the operation principle of the self-service seat are explained in detail as follows:

the specific use method comprises the following steps: the normal state of the self-service seat is that the support 1 and the seat 2 are jointed, an old person can normally sit on the seat 2, when the old person with inconvenient legs and feet needs to get up, the old person can firstly pedal the first connecting rod 50 of the limiting mechanism 5, the free end of the third connecting rod 53 is placed into the second through hole 30a, and then the free end of the elastic part 9 connected with the first connecting rod 50 is fixed with the support 1, so that the sealing of the oil containing cavity 33 is realized; after the actions are finished, the other foot of the old man is used for stepping down the second connecting frame rod 40, the hydraulic oil in the oil cylinder 43 is continuously supplied into the oil accommodating cavity 33 of the hydraulic device 3, so as to jack up the seat 2, thereby helping the lower limb strength decline, helping the old man with the control capability weakened and the like to bear part of the body weight of the old man which is difficult to get up after sitting down, helping the old man to get up, when the seat 2 needs to be put down, firstly, the end of the elastic part 9 connected with the support 1 is restrained and released, then, the first connecting frame rod 50 returns to drive the third connecting rod 53 to move outwards until the third connecting rod is withdrawn from the second through hole 30a, at the moment, the hydraulic oil in the oil accommodating cavity 33 overflows into the oil return cavity 32a from the second through hole 30a, and is pressed into the oil cylinder 43 through the oil return pipe 46 communicated with the oil return hole 32c, the pressure in the oil accommodating cavity 33 is gradually reduced, and the seat 2 can, thereby returning to the normal state of the self-service seat.

The operation principle is as follows: pedal first side link 50, first side link 50 drives first connecting rod 51 downswing when rotating, and first connecting rod 51 drives second connecting rod 52 and does the horizontal hunting to second connecting rod 52 drives third connecting rod 53 and does the horizontal hunting, makes this stop gear 5 set up to planar slider mechanism, thereby makes third connecting rod 53 can penetrate or stretch out second through-hole 30a, can realize the sealed and pressure release of opposition oil pocket 33. The other foot of the user can step on the second side link 40 downwards, the second side link 40 drives the fourth connecting rod 41 to swing up and down, so as to drive the ejector rod 42 hinged with the fourth connecting rod 41 to move axially in the oil cylinder 43, compression of hydraulic oil in the oil cylinder 43 is realized, pressurized hydraulic oil is supplied into the oil accommodating cavity 33 through the oil supply pipe 45 to provide power for lifting the upper cylinder 31, the first one-way valve 6 is arranged on the oil supply pipe 45, the pressurized hydraulic oil in the oil cylinder 43 is continuously supplied into the oil accommodating cavity 33, and as the pressure in the oil accommodating cavity 33 is continuously increased, pressure is required to be released externally, a specific pressure release mode is that the upper cylinder 31 is continuously pushed up to open an oil cavity space, and in addition, two backflow modes exist, firstly, namely, the third connecting rod 53 is continuously impacted to block the second through hole 30a, and secondly: backflow is conducted to the oil cylinder 43 through the oil supply pipe 45, if the backflow problem is not considered in design, uncertainty in movement is inevitable, namely the seat 2 is unstable in lifting, and the seat 2 has extremely high safety risk and is particularly suitable for the old people's seat 2, therefore, the first one-way valve 6 plays a role in preventing high-pressure hydraulic oil in the oil containing cavity 33 from flowing backwards to the oil cylinder 43, the elastic part 9 is used for fixing the first connecting rod 50 after action, so that the third connecting rod 53 can be guaranteed to be stably sealed off from the second through hole 30a, and the hydraulic oil is prevented from being flushed away from the second through hole 30a to cause pressure relief of the oil containing cavity 33.

Example 4: with reference to FIG. 1

Compared with the embodiment, the difference is that the oil supply pipe 45 is also provided with a pressure cylinder 44, and the pressure cylinder 44 is a gas-liquid pressure cylinder 44 with the model of MPT63X50X 10-1T; the booster cylinder 44 serves the purpose of secondary pressurization of the hydraulic oil, thereby ensuring the dynamic stability of the lifting of the seat 2.

Example 5: with reference to FIG. 1

Compared with the embodiment 4, the difference is that the support 1 is provided with the hook hand 8, the free end of the elastic part 9 is detachably fixed with the hook hand 8, the arrangement mode is stable in fixation and convenient to detach, and the elastic part 9 can be rapidly fixed and detached.

Example 6: with reference to FIG. 1

Compared with the embodiment 3, the difference is that the elastic member 9 is a compression spring which can buffer the impact of the high-pressure hydraulic oil in the oil accommodating chamber 33; therefore, the abrasion of the hinged parts of the components of the limiting mechanism 5 or the rigid damage of the third connecting rod 53 caused by the nowhere released impact stress borne by the third connecting rod 53 when the first connecting rod 50 is rigidly connected is avoided. The use safety is improved, and the pressure spring forms standard parts with various stress strengths in the industry, so that the whole manufacturing cost of the equipment can be reduced, and the selection range is wider.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A self-service seat comprises a support (1) and a seat (2), wherein the front end of the seat (2) is rotatably connected with the support (1), and a hydraulic device (3) for pushing the seat (2) to overturn is arranged between the support (1) and the seat (2); the method is characterized in that: the device also comprises a supercharging mechanism (4) used for supplying oil and supercharging for the hydraulic device (3);

the supercharging mechanism (4) comprises a second side link (40), a fourth connecting rod (41), a top rod (42), an oil cylinder (43), an oil supply pipe (45) and an oil return pipe (46), wherein the second side link (40) is fixed on the support (1) through a frame body, two ends of the fourth connecting rod (41) are respectively hinged with the second side link (40) and the top rod (42), the other end of the top rod (42) is arranged in the oil cylinder (43), the top rod can axially move in the oil cylinder (43) to compress hydraulic oil during action, one end of the oil supply pipe (45) is communicated with the oil cylinder (43), the other end of the oil supply pipe is communicated with the hydraulic device (3), one end of the oil return pipe (46) is communicated with the oil cylinder (43), the other end of the oil return pipe is communicated with the hydraulic device (3), a first one-way valve (6) is arranged on the oil supply pipe (45), and the opening direction of the first one-way valve (6) is, and a second one-way valve (7) is arranged on the oil return pipe (46), and the opening direction of the second one-way valve (7) is from the hydraulic device (3) to the oil cylinder (43).

2. The self-service seat according to claim 1, wherein: the hydraulic device (3) comprises a lower barrel (30), an upper barrel (31) and a sleeve (32), the outer wall of the upper barrel (31) is attached to the inner wall of the lower barrel (30), so that the upper barrel (31) can axially move in the lower barrel (30), a placement oil cavity (33) is formed between the near end of a bottom plate of the upper barrel (31) away from the lower barrel (30) and the lower barrel (30), the other end of the upper barrel (31) is fixed on the seat (2), the lower barrel (30) is coaxially fixed in the sleeve (32), a sealed oil return cavity (32a) is formed between the sleeve (32) and the lower barrel (30), a through oil return hole (32c) is formed in the oil return cavity (32a) part of the bottom plate of the sleeve (32) and the oil return cavity (33) part of the bottom plate of the lower barrel (30), an oil supply hole (33a) penetrating through the sleeve (32) and the oil return cavity (33) is formed in the oil return cavity part, a first through hole (32b, the lower tube (30) is provided with a second through hole (30a) which is through at the same side at the position where the first through hole (32b) is arranged.

3. The self-service seat according to claim 2, wherein: supply oil pipe (45) one end and hydro-cylinder (43) intercommunication, the other end with supply oil hole (33a) intercommunication, oil return pipe (46) one end and hydro-cylinder (43) intercommunication, the other end and oil return hole (32c) intercommunication, be equipped with first check valve (6) on supplying oil pipe (45), first check valve (6) opening direction is hydro-cylinder (43) to supply oil hole (33a), be equipped with second check valve (7) on oil return pipe (46), second check valve (7) opening direction is oil return hole (32c) to hydro-cylinder (43).

4. The self-service seat according to claim 3, wherein: the seat cushion is characterized by further comprising a limiting mechanism (5) used for lifting the seat and used for relieving pressure of a hydraulic device, wherein the limiting mechanism (5) comprises a first connecting rod (50), a first connecting rod (51), a second connecting rod (52), a third connecting rod (53) and an elastic piece (9), wherein the first connecting rod (50) is fixed on the support (1) through the frame body, one end of the elastic part (9) is fixed on the first connecting rod (50), the other end of the elastic part is detachably fixed on the support (1), two ends of the first connecting rod (51) are respectively hinged with the first connecting rod (50) and the second connecting rod (52), the other end of the second connecting rod (52) is hinged with one end of the third connecting rod (53), and the other end of the third connecting rod (53) stretches into the first through hole (32b) and can stretch into the second through hole (30a) when acting to form sealing of the opposite oil cavity (33) and the oil return cavity (32 a).

5. A self-service seat as claimed in any one of claims 1 to 3, wherein: the oil supply pipe (45) is also provided with a pressure cylinder (44).

6. The self-service seat according to claim 4, wherein: the oil supply pipe (45) is also provided with a pressure cylinder (44).

7. The self-service seat according to claim 4, wherein: the support (1) is provided with a hook hand (8), and the free end of the elastic piece (9) is detachably fixed with the hook hand (8).

8. The self-service seat according to claim 6, wherein: the support (1) is provided with a hook hand (8), and the free end of the elastic piece (9) is detachably fixed with the hook hand (8).

9. The self-service seat according to claim 4, wherein: the elastic piece (9) is a pressure spring.

10. The self-service seat according to claim 6, wherein: the elastic piece (9) is a pressure spring.

11. The self-service seat according to claim 7, wherein: the elastic piece (9) is a pressure spring.

12. The self-service seat according to claim 8, wherein: the elastic piece (9) is a pressure spring.