CN113952130B - Seat convenient to open and close - Google Patents

Abstract

The invention provides a seat convenient to open and close, which comprises a seat frame, a wheel set mechanism and a seat mechanism, wherein the wheel set mechanism is arranged at the bottom of the seat frame; the seat mechanism is rotatably arranged on any side of the seat frame, a transmission mechanism is arranged at the joint of the seat mechanism and the seat frame and used for realizing horizontal opening or closing of the seat mechanism, and the transmission mechanism is also used for realizing ascending or descending of the seat mechanism on the seat frame. The seat mechanism is opened and closed by rotating along the horizontal direction on the left side and the right side, and the seat mechanism can also vertically move up and down on the seat frame, so that the seat mechanism can be switched between a low position and a high position, the occurrence of the inconvenience of the seat in the horizontal direction when a user moves on other seats and the seat is reduced, and the convenience and the self-service performance of the use of the seat are improved.

Description

Seat convenient to open and close

Technical Field

The invention relates to the technical field of nursing equipment, in particular to a seat convenient to open and close.

Background

For the elderly or patients with impaired mobility, especially those with impaired mobility of the lower limbs, such as those with weak lower limbs or those with just completed surgery, only one person can lean on the bed each day, perhaps sitting up on the bed with the aid of handrails or the like, but the movement of the elderly or patients with impaired mobility of the lower limbs (hereinafter referred to as users) is usually accomplished with the aid of a movable sitting tool, such as a wheelchair.

Wheelchairs are the most commonly used type of seating that helps people with impaired lower limb mobility move. When using a conventional wheelchair, a user generally needs to assist another person in sitting on the wheelchair, and then rotate the wheels of the wheelchair by himself or push the wheelchair by another person to move the wheelchair. However, it is very troublesome for a person with weak lower limbs to sit on the wheelchair by himself.

In this regard, there is a seat in the prior art in which an opening direction of a seat is directed rearward, and the seat is detachable or expandable to both sides, and a support plate is provided in front of the seat. When the wheelchair is used, the self-service wheelchair is pushed backwards to the edge of other seats (such as a bed, a chair, a toilet and the like) where a user is located, the user supports the hands on the supporting plate to assist force, slightly lifts the buttocks, then installs or gathers the seat below the buttocks, and the user can sit on the wheelchair seat after sitting down. Because the supporting plate can be utilized to borrow force, the main force of a user is concentrated on the upper limbs in the process of sitting on the wheelchair, the lower limbs only need to exert small force, and the user does not need to turn around, so that the convenience and the safety of the wheelchair are greatly improved.

The inventor believes that seating furniture in the prior art has poor self-service performance and requires the assistance of others in installing or collapsing the seat. And because the height of the wheelchair seat needs to be adapted to the height change of other seats, the height cannot be adjusted in the use process, so that the wheelchair seat is inconvenient for a user to move between the seats with the changed heights, and the wheelchair seat needs to be improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a seat convenient to open and close.

The seat convenient to open and close comprises a seat frame, a wheel set mechanism and a seat mechanism, wherein the wheel set mechanism is arranged at the bottom of the seat frame; the seat mechanism is rotatably arranged on any side of the seat frame, a transmission mechanism is arranged at the joint of the seat mechanism and the seat frame and used for realizing horizontal opening or closing of the seat mechanism, and the transmission mechanism is also used for realizing ascending or descending of the seat mechanism on the seat frame.

Preferably, the seat frame comprises a main frame body, two chair handles and mounting sleeves, wherein the two chair handles are arranged on the main frame body at intervals, and one of the mounting sleeves is vertically arranged at one end, far away from the main frame body, of each of the two chair handles; the seat mechanism comprises a seat armrest, a seat cushion and a seat backrest, wherein one seat armrest is respectively arranged on two mounting sleeves through a transmission mechanism, one seat cushion is horizontally arranged at the lower parts of the inner sides of the two seat armrests, and one seat backrest is vertically and rotatably arranged at one side, far away from a seat frame, of the two seat armrests.

Preferably, the seat mechanism is further provided with a switch assembly for controlling the movement or locking of the seat mechanism, and the switch assembly comprises a switch handle, a lock tongue and an elastic piece; the seat frame is provided with a lock catch, the lock tongue is slidably arranged on the inner side of the seat mechanism, the sliding direction of the lock tongue is in the same direction as the direction of the lock tongue, which is close to or far away from the lock catch, the lock tongue is locked with the lock catch, the elastic piece is arranged on the inner side of the seat mechanism, the extending direction of the elastic piece is in the same direction as the sliding direction of the lock tongue, and the elastic piece is fixedly connected with one end, which is far away from the lock catch, of the lock tongue; the outside of seat mechanism is provided with the handle rotation axis, the switch handle is installed on the handle rotation axis and rather than normal running fit, be provided with the arc notch on the seat mechanism, be provided with the handle transfer line on the switch handle, the arc notch is worn to establish from outside to inside to the handle transfer line, just the one end that the handle transfer line penetrated in the seat mechanism inserts the spring bolt.

Preferably, the transmission mechanism comprises a first cylindrical cam and a first transmission shaft lever, the first cylindrical cam is vertically embedded on the seat frame, the first transmission shaft lever is fixedly connected with the seat mechanism, the first transmission shaft lever is coaxially embedded in the first cylindrical cam and is in rolling sliding fit with the first cylindrical cam, a curved groove is formed in the side wall of the first cylindrical cam, and a moving roller is arranged on the first transmission shaft and embedded in the curved groove and is in rolling fit with the first transmission shaft lever.

Preferably, the transmission mechanism comprises a threaded sleeve and a second transmission shaft rod, the threaded sleeve is vertically and fixedly arranged on the seat frame, the second transmission shaft rod is fixedly connected with the seat mechanism, and the second transmission shaft rod is coaxially embedded in the threaded sleeve and is in threaded fit with the threaded sleeve.

Preferably, the second transmission shaft is provided with a threaded portion, and the threaded portion is engaged with the internal thread of the threaded sleeve.

Preferably, the transmission mechanism comprises a first rotary tube shaft which is vertically embedded on the seat frame and is in sliding fit with the seat frame in a rotating way, and the upper end of the first rotary tube shaft is fixedly arranged on the seat mechanism.

Preferably, the transmission mechanism further comprises a first limiting block, the first limiting block is fixedly installed on the seat mechanism, and the first limiting block is located right below the first rotary tube shaft.

Preferably, the transmission mechanism comprises a second rotary tube shaft, a gas spring cylinder body, a gas spring rod and a pull-resistant screw rod, wherein the second rotary tube shaft is vertically embedded on the seat frame and is matched with the seat frame in a rotating sliding manner, the upper end of the second rotary tube shaft is fixedly arranged on the seat mechanism, the gas spring cylinder body is embedded in the second rotary tube shaft, the gas spring rod is embedded in the gas spring cylinder body from bottom to top, the pull-resistant screw rod is arranged on the seat frame, and the pull-resistant screw rod is positioned above the end part of the gas spring rod, which is far away from the gas spring cylinder body.

Preferably, one end of the gas spring rod far away from the gas spring cylinder body is provided with a rod head, the rod head comprises a rod head plane and a rod head spherical surface, the rod head plane is positioned on one side of the rod head close to the gas spring cylinder body, and the rod head spherical surface is positioned on one side of the rod head far away from the gas spring cylinder body.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the seat mechanism is separated into the left side and the right side to be rotated and opened and closed along the horizontal direction through the transmission mechanism, and the seat mechanism can also vertically move up and down on the seat frame, so that the seat mechanism can be switched between a low position and a high position, the occurrence of inconvenient rotation and opening and closing of the seat along the horizontal direction caused by the difference of the heights of other seats when a user moves on other seats and the seat is reduced, and the convenience and self-service performance of the seat are improved;

2. the invention controls the movement and locking of the seat mechanism through the switch assembly, and the seat mechanism can be opened by rotating the switch handle, and then the position of the seat mechanism is manually adjusted, thereby being beneficial to improving the convenience and self-service performance of the seat;

3. the seat backrest is in rotary connection with the seat armrests, and is also beneficial to improving the convenience of using the seat.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of a side overall structure of a seating mechanism embodying the present invention in a closed position;

FIG. 2 is a schematic view of the rear overall structure of the seating mechanism embodying the present invention in an open position;

FIG. 3 is a schematic view of the overall structure of the present invention, showing the switch assembly in the armrest of the seat;

FIG. 4 is a schematic view of the overall structure of the present invention, showing the switch assembly positioned outside the armrest of the seat;

FIG. 5 is a schematic view of the overall structure of a locking bolt embodying the present invention;

FIG. 6 is a schematic diagram of the overall structure of a transmission mechanism embodying the present invention;

FIG. 7 is a schematic view showing the overall structure of a transmission mechanism according to a modification 1 of the present invention;

FIG. 8 is a schematic view showing the overall structure of a transmission mechanism embodying the present invention mainly in variation 2;

fig. 9 is a schematic view showing the overall structure of a transmission mechanism according to variation 3 of the present invention.

Reference numerals: 1. a seat frame; 11. a main frame body; 12. a chair handle; 13. installing a sleeve; 131. locking; 2. a wheel set mechanism; 21. a front wheel; 22. a rear wheel; 3. a seat mechanism; 31. armrests of seats; 311. a mounting base; 312. a fixing clamp; 313. a handle rotation shaft; 314. an arc-shaped notch; 32. a seat cushion; 33. a seat back; 4. a transmission mechanism; 41. a first cylindrical cam; 411. a curved trench; 42. a first drive shaft; 421. a moving roller; 5. a switch assembly; 51. a switch handle; 511. a handle drive rod; 512. a handle roller; 52. a bolt; 521. straight surfaces of the lock bolts; 522. a spring bolt inclined plane; 53. a spring; 61. a threaded sleeve; 62. a second drive shaft; 621. a threaded portion; 63. a fixing ring; 71. a first rotating tube shaft; 72. a first limiting block; 81. a second rotating tube shaft; 82. a gas spring cylinder; 83. a gas spring rod; 831. a club head; 8311. a club head plane; 8312. a club head spherical surface; 84. pulling-resistant screw rod; 85. and a second limiting block.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.

As shown in fig. 1, the seat convenient to open and close provided by the invention comprises a seat frame 1, a wheel set mechanism 2 and a seat mechanism 3, wherein the wheel set mechanism 2 comprises two front wheels 21 and two rear wheels 22, and the two front wheels 21 and the two rear wheels 22 are arranged at the bottom of the seat frame 1 at intervals. The seat mechanism 3 is rotatably arranged on any side of the seat frame 1, a transmission mechanism 4 is arranged at the joint of the seat mechanism 3 and the seat frame 1, and a switch component 5 for controlling the movement or locking of the seat mechanism 3 is also arranged on the seat mechanism 3.

As shown in fig. 1 and 2, the seat frame 1 is a metal frame structure, the seat frame 1 stands on the ground, and the seat frame 1 includes a main frame body 11, a seat handle 12, and a mounting sleeve 13. The two chair handles 12 are fixedly connected to the rear part of the main frame 11 at intervals, the two chair handles 12 are positioned in the same horizontal plane, and the two chair handles 12 are positioned at the upper position of the middle part of the main frame 11. The two mounting sleeves 13 are fixedly connected with one at the edge of one side of the two chair handles 12 far away from the main frame 11, the two mounting sleeves 13 are vertically arranged, and the transmission mechanism 4 is provided with one group in the two mounting sleeves 13.

The seat mechanism 3 comprises a seat armrest 31, a seat cushion 32 and a seat backrest 33, wherein one seat armrest 31 is respectively arranged on two mounting sleeves 13 through a transmission mechanism 4, the two seat armrests 31 are vertically arranged, and the two seat armrests 31 are respectively in running fit with the corresponding mounting sleeves 13. The seat cushion 32 is horizontally and fixedly arranged at the lower parts of the inner sides of the two seat armrests 31, and the seat backrest 33 is respectively hinged with one of the two seat armrests 31 at the edge position of one side far away from the mounting sleeve 13. When in use, a worker rotates the seat back 33 around the joint of the seat back and the seat armrest 31, thereby improving the convenience and comfort of using the seat.

As shown in fig. 3 and 4, the switch assemblies 5 are mounted on two seat armrests 31 in one group, and since the structure, the mounting manner and the connection relationship of the two groups of switch assemblies 5 are the same, a group of switch assemblies 5 will be described as an example.

A lock catch 131 is fixedly mounted on the outer side wall of the mounting sleeve 13, and the switch assembly 5 comprises a switch handle 51, a lock tongue 52 and an elastic member. The mounting seat 311 and the fixing clamp 312 are horizontally and fixedly arranged on the inner side of the seat armrest 31, the mounting seat 311 is matched with the fixing clamp 312 in a clamping way, and the mounting seat 311 is matched with the fixing clamp 312 to horizontally install the lock tongue 52 on the inner side of the seat armrest 31. The lock tongue 52 is slidably matched with the mounting seat 311 and the fixing clamp 312 respectively, the sliding direction of the lock tongue 52 is the same as the direction of the lock tongue 52 approaching or separating from the lock catch 131, and the lock tongue 52 is locked with the lock catch 131. The elastic piece is a spring 53, the spring 53 is horizontally installed in a space formed by the cooperation of the installation seat 311 and the fixing clamp 312, the expansion direction of the spring 53 is parallel to the sliding direction of the lock tongue 52, and one end, close to the lock tongue 52, far away from the lock catch 131 of the spring 53 is fixedly connected with the lock tongue 52 in a plugging manner.

As shown in fig. 3 and 5, a lock tongue straight surface 521 and a lock tongue inclined surface 522 are processed at one end of the lock tongue 52 near the lock catch 131, and when the lock is unlocked, the lock tongue straight surface 521 is separated from the lock catch 131, so that the seat armrest 31 can horizontally rotate around the axis of the mounting sleeve 13; when the lock is locked, the lock tongue inclined surface 522 touches the side edge of the lock catch 131, the lock tongue 52 moves linearly backwards, the spring 53 at the tail part of the lock tongue 52 is compressed, and when the lock tongue 52 moves to the notch position of the lock catch 131, the spring 53 is released, and the lock tongue 52 is inserted into the lock catch 131 and locked with the lock catch 131.

As shown in fig. 3, 4 and 5, a handle rotation shaft 313 is integrally formed on the outer side of the seat armrest 31, and the handle rotation shaft 313 is horizontally provided. The switch knob 51 is rotatably mounted on the knob rotation shaft 313. The seat armrest 31 is provided with an arc notch 314, the switch handle 51 is integrally provided with a handle transmission rod 511, the arc notch 314 is penetrated from outside to inside by the handle transmission rod 511, and one end of the handle transmission rod 511 penetrating into the inner side of the seat armrest 31 is embedded in the middle of the lock tongue 52. Further, a handle roller 512 is sleeved at one end of the handle transmission rod 511 penetrating into the inner side of the seat armrest 31, and the handle roller 512 is embedded in the middle part of the lock tongue 52 and is in sliding fit with the lock tongue. Turning the switch handle 51 is achieved, driving the tongue 52 closer to or farther from the shackle 131.

As shown in fig. 6, since the structure, the installation manner, and the connection relationship of any one set of transmission mechanisms 4 are the same, a set of transmission mechanisms 4 will be described as an example.

The transmission mechanism 4 comprises a first cylindrical cam 41 and a first transmission shaft lever 42, wherein the first cylindrical cam 41 is coaxially embedded in the mounting sleeve 13 and is tightly matched with the mounting sleeve, the first transmission shaft lever 42 is coaxially embedded in the first cylindrical cam 41 and is in rotary sliding fit with the first cylindrical cam, and the upper end and the lower end of the first transmission shaft lever 42 are fixedly mounted and connected with the seat armrest 31. Thereby effecting a horizontal rotation of the seat armrest 31 about the center of the first drive shaft 42.

Further, a curved groove 411 is formed in the cylindrical surface on the circumferential side of the first cylindrical cam 41, and the curved groove 411 surrounds the central axis of the first cylindrical cam 41. The peripheral side wall of the first transmission shaft lever 42 is provided with a moving roller 421, and the moving roller 421 is embedded in the curved groove 411 and is in rolling fit with the curved groove 411. When the seat armrest 31 rotates horizontally, the seat armrest 31 also moves up and down in the vertical direction while rotating due to the cooperation of the moving rollers 421 and the curved grooves 411. Thus, the seat cushion 32 rotates and swings between the open position and the closed position in the horizontal direction with the axis of the first transmission shaft rod 42 as the rotation center and moves up and down synchronously, thereby improving the convenience of using the seat.

Variation 1

As shown in fig. 7, the transmission mechanism 4 includes a threaded sleeve 61, a second transmission shaft 62 and a fixing ring 63, the threaded sleeve 61 is coaxially embedded in the mounting sleeve 13 and is tightly matched with the mounting sleeve 13, the fixing ring 63 is coaxially embedded in the mounting sleeve 13 and is tightly matched with the mounting sleeve, and the fixing ring 63 is located right above the threaded sleeve 61, so that the stability of the mounting of the threaded sleeve 61 in the mounting sleeve 13 is improved.

The second transmission shaft 62 is coaxially penetrated through the threaded sleeve 61 and the fixed ring 63, the second transmission shaft is in rotary sliding fit with the fixed ring 63, the second transmission shaft 62 is provided with a threaded part 621, the threaded part 621 is meshed with the internal threads of the threaded sleeve 61, and the upper end and the lower end of the second transmission shaft 62 are fixedly connected to the seat armrest 31.

By the engagement of the screw 621 with the screw thread of the screw sleeve 61, the seat armrest 31 is rotated while also performing a vertical lifting movement. Thereby making the seat cushion 32 swing and move up and down synchronously between the open position and the closed position in the horizontal direction with the axis of the second transmission shaft lever 62 as the rotation center, improving the convenience of the seat use.

Variation 2

As shown in fig. 8, the transmission mechanism 4 includes a first rotary tube shaft 71, the first rotary tube shaft 71 is coaxially embedded in the mounting sleeve 13, and the first rotary tube shaft 71 is in a rotationally sliding fit with the inner wall of the mounting sleeve 13. The upper end of the first rotating tube shaft 71 extends out of the mounting sleeve 13, and the upper end of the first rotating tube shaft 71 is fixedly connected with the seat armrest 31 by welding. The worker rotates and lifts or presses down the seat armrest 31, and rotates and moves up and down the first rotation tube shaft 71 in the mounting sleeve 13.

Further, the transmission mechanism 4 further includes a first stopper 72, the first stopper 72 is fixedly mounted on the seat armrest 31, and the first stopper 72 is located right below the mounting sleeve 13. When the first rotation tube shaft 71 is lifted up by a certain distance, the first stopper 72 abuts against the mounting sleeve 13, so that the first rotation tube shaft 71 is prevented from being pulled out of the mounting sleeve 13 when the seat armrest 31 is lifted up.

By means of the cooperation of the first rotary tube shaft 71 and the mounting sleeve 13, the seat armrest 31 is enabled to rotate and open in the horizontal direction by taking the axis of the first rotary tube shaft 71 as a rotation center, and the seat armrest 31 can independently perform up-and-down lifting movement, so that the convenience of using the seat is improved.

Variation 3

As shown in fig. 9, the transmission mechanism 4 includes a second rotary tube shaft 81, a gas spring cylinder 82, a gas spring rod 83, and a drag screw 84, and the second rotary tube shaft 81 is coaxially embedded in the mounting sleeve 13 and is in rotationally sliding engagement therewith. The upper end of the second rotating tube shaft 81 extends out of the mounting sleeve 13, and the upper end of the second rotating tube shaft 81 is fixedly connected with the seat armrest 31 by welding.

The air spring cylinder 82 is embedded in the second rotating tube shaft 81, and the air spring cylinder 82 is fixedly connected with the seat armrest 31, and the air spring rod 83 is installed in the air spring cylinder 82 from bottom to top. The lower end of the air spring rod 83 is integrally formed with a head 831, the head 831 includes a head plane 8311 and a head spherical surface 8312, and the head plane 8311 is located at a side of the head 831 close to the air spring cylinder 82, and the head spherical surface 8312 is located at a side of the head 831 far from the air spring cylinder 82. The pull-blocking screw 84 is fixedly mounted on the inner wall of the mounting sleeve 13, and the pull-blocking screw 84 is located above the rod head 831.

When the air spring cylinder 82 and the air spring rod 83 rotate along with the second rotating tube shaft 81 and move up and down, and rotate and lift or press the seat armrest 31 up and down, the second rotating tube shaft 81 rotates in the mounting sleeve 13, the pull-resistant screw 84 limits the rod head plane 8311 to move up and down, and the rod head spherical surface 8312 contacts the bottom surface of the mounting sleeve 13, so that the air spring rod 83 can rotate along with the air spring cylinder 82 and can stretch and retract in the air spring cylinder 82, balance of the overall weight of the seat mechanism 3 is achieved, and convenience in lifting the seat armrest 31 is improved.

Further, the transmission mechanism 4 further includes a second limiting block 85, the second limiting block 85 is fixedly installed on the seat armrest 31, and the second limiting block 85 is located right below the installation sleeve 13. When the second rotating tube shaft 81 is lifted up by a certain distance, the second stopper 85 abuts against the mounting sleeve 13, so that the second rotating tube shaft 81 is prevented from being pulled out of the mounting sleeve 13 when the seat armrest 31 is lifted up.

By means of the cooperation of the second rotating tube shaft 81 and the mounting sleeve 13, the seat armrest 31 is enabled to rotate and open and close along the horizontal direction, and the seat armrest 31 can independently perform up-and-down movement, so that the convenience of using the seat is improved; and by means of the cooperation of the air spring cylinder 82 and the air spring rod 83, the convenience of lifting the seat armrest 31 is improved.

Principle of operation

In operation, a worker rotates the switch handle 51 around the handle rotation shaft 313 or releases the switch handle 51, rotates the two seat handrails 31, drives the lock tongue 52 to be separated from or inserted into the notch of the lock catch 131 through the switch assembly 5, and realizes the movement and locking of the seat mechanism 3; the two seat armrests 31 are manually controlled to be opened and closed by a worker, the left side and the right side of the seat mechanism 3 are respectively opened and closed in a rotating way along the horizontal direction through the transmission mechanism 4, and the seat mechanism 3 can also vertically move up and down on the seat frame 1, so that the seat mechanism 3 can be switched between a low position and a high position, the occurrence of the inconvenience of the opening and closing of the seat caused by the difference in height between other seats is reduced, and the convenience and self-service performance of the use of the seat are improved.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.

The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims (9)

1. The seat convenient to open and close is characterized by comprising a seat frame (1), a wheel set mechanism (2) and a seat mechanism (3), wherein the wheel set mechanism (2) is arranged at the bottom of the seat frame (1);

the seat mechanism (3) is rotatably arranged on any side of the seat frame (1), a transmission mechanism (4) is arranged at the joint of the seat mechanism (3) and the seat frame (1), the transmission mechanism (4) is used for realizing horizontal opening or closing of the seat mechanism (3), and the transmission mechanism (4) is also used for realizing ascending or descending of the seat mechanism (3) on the seat frame (1);

the seat mechanism (3) is also provided with a switch assembly (5) for controlling the movement or locking of the seat mechanism (3), and the switch assembly (5) comprises a switch handle (51), a lock tongue (52) and an elastic piece;

the seat frame (1) is provided with a lock catch (131), the lock tongue (52) is slidably arranged on the inner side of the seat mechanism (3), the sliding direction of the lock tongue (52) is in the same direction as the direction of the lock tongue (52) approaching or separating from the lock catch (131), the lock tongue (52) is locked with the lock catch (131), the elastic piece is arranged on the inner side of the seat mechanism (3), the stretching direction of the elastic piece is in the same direction as the sliding direction of the lock tongue (52), and the elastic piece is fixedly connected with one end of the lock tongue (52) separating from the lock catch (131);

the outside of seat mechanism (3) is provided with handle rotation axis (313), switch handle (51) install on handle rotation axis (313) and with its normal running fit, be provided with arc notch (314) on seat mechanism (3), be provided with handle transfer line (511) on switch handle (51), arc notch (314) are worn to establish from outside to inside in handle transfer line (511), just one end that handle transfer line (511) penetrated in seat mechanism (3) inserts spring bolt (52).

2. The seat convenient to open and close according to claim 1, wherein the seat frame (1) comprises a main frame body (11), seat handles (12) and mounting sleeves (13), the seat handles (12) are arranged on the main frame body (11) at intervals, and the mounting sleeves (13) are vertically arranged at one end, far away from the main frame body (11), of each of the two seat handles (12);

the seat mechanism (3) comprises a seat armrest (31), a seat cushion (32) and a seat backrest (33), wherein the seat armrest (31) is respectively provided with one on two mounting sleeves (13) through a transmission mechanism (4), the seat cushion (32) is horizontally arranged at the lower parts of the inner sides of the two seat armrests (31), and the seat backrest (33) is vertically and rotatably arranged at one side, far away from the seat frame (1), of the two seat armrests (31).

3. The seat convenient to open and close as claimed in claim 1, wherein the transmission mechanism (4) comprises a first cylindrical cam (41) and a first transmission shaft lever (42), the first cylindrical cam (41) is vertically embedded on the seat frame (1), the first transmission shaft lever (42) is fixedly connected with the seat mechanism (3), the first transmission shaft lever (42) is coaxially embedded in the first cylindrical cam (41) and is in rotary sliding fit with the first cylindrical cam, a curved groove (411) is formed in the side wall of the first cylindrical cam (41), a moving roller (421) is arranged on the first transmission shaft lever (42), and the moving roller (421) is embedded in the curved groove (411) and is in rolling fit with the curved groove.

4. A seat convenient for opening and closing as claimed in claim 1, characterized in that the transmission mechanism (4) comprises a threaded sleeve (61) and a second transmission shaft lever (62), the threaded sleeve (61) is vertically and fixedly arranged on the seat frame (1), the second transmission shaft lever (62) is fixedly connected with the seat mechanism (3), and the second transmission shaft lever (62) is coaxially embedded in the threaded sleeve (61) and is in threaded fit with the threaded sleeve.

5. A seat as claimed in claim 4, wherein said second transmission shaft (62) is provided with a threaded portion (621), said threaded portion (621) being engaged with the internal thread of the threaded sleeve (61).

6. The seat convenient to open and close as claimed in claim 1, wherein the transmission mechanism (4) comprises a first rotary tube shaft (71), the first rotary tube shaft (71) is vertically embedded on the seat frame (1) and is matched with the seat frame in a rotary sliding way, and the upper end of the first rotary tube shaft (71) is fixedly arranged on the seat mechanism (3).

7. The seat convenient to open and close as claimed in claim 6, wherein the transmission mechanism (4) further comprises a first limiting block (72), the first limiting block (72) is fixedly arranged on the seat mechanism (3), and the first limiting block (72) is located right below the first rotary tube shaft (71).

8. The seat convenient to open and close according to claim 1, wherein the transmission mechanism (4) comprises a second rotary tube shaft (81), a gas spring cylinder body (82), a gas spring rod (83) and a pull-resistant screw rod (84), the second rotary tube shaft (81) is vertically embedded on the seat frame (1) and is in sliding fit with the seat frame in a rotating way, the upper end of the second rotary tube shaft (81) is fixedly arranged on the seat mechanism (3), the gas spring cylinder body (82) is embedded in the second rotary tube shaft (81), the gas spring rod (83) is embedded in the gas spring cylinder body (82) from bottom to top, the pull-resistant screw rod (84) is arranged on the seat frame (1), and the pull-resistant screw rod (84) is located above the end part, far away from the gas spring cylinder body (82), of the gas spring rod (83).

9. The seat convenient to open and close as claimed in claim 8, wherein a head (831) is provided at an end of the air spring rod (83) away from the air spring cylinder (82), the head (831) includes a head plane (8311) and a head spherical surface (8312), the head plane (8311) is located at a side of the head (831) close to the air spring cylinder (82), and the head spherical surface (8312) is located at a side of the head (831) away from the air spring cylinder (82).