CN112677845B

CN112677845B - Seat face lifting device of automobile seat

Info

Publication number: CN112677845B
Application number: CN202110035213.8A
Authority: CN
Inventors: 何建宏
Original assignee: Individual
Current assignee: Jiangsu Xuanyu Technology Co.,Ltd.
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2022-10-11
Anticipated expiration: 2041-01-12
Also published as: CN112677845A

Abstract

The invention provides a seat surface lifting device of an automobile seat, which relates to the field of automobile seat parts and aims to solve the problems that when a driver drives an automobile, arms are in a suspended state for a long time, so that arm muscles have a pain feeling, and the positions of the handrails of the existing seat are not easy to adjust; drivers are easy to fatigue when driving the waist of the automobile, lack a reasonable waist protecting structure, and usually buy a back cushion for the waist in addition, which wastes money; the existing automobile seat backrest has the advantages that the height of the seat backrest is fixed, the use requirements of different heights and posture characteristics of drivers cannot be met, and the problem of low comfort of the seat is caused; guide plates are arranged on two sides of the rear end of the chair seat and are symmetrically distributed. The invention can protect the waist and reduce the driving fatigue because the waist backing plate is arranged and the height can be adjusted, and the driver does not need to purchase a back cushion for the seat additionally, thereby saving the fund.

Description

Seat surface lifting device of automobile seat

Technical Field

The invention belongs to the field of automobile seat parts, and particularly relates to a seat surface lifting device of an automobile seat.

Background

The vehicle seat is a seat to be seated when a vehicle is seated, and can be roughly classified into: a front row seat: headrest, back, cushion, and back row seat: the automobile seat is particularly important in automobile design because the design quality of the automobile seat determines the riding comfort of a driver and passengers.

For example, application No.: the invention of CN201811016246.2 provides a lifting device and method for an automobile seat, which comprises an intermediate shaft, and an adjusting handle, an adjusting gear, an outer fixed shell, an inner shell and an output gear which are coaxially and sequentially arranged on the intermediate shaft, wherein the adjusting gear and the inner shell are both fixed on the intermediate shaft, the adjusting handle and the adjusting gear are connected through a connecting piece arranged on the adjusting handle, the outer fixed shell is sleeved on the inner shell, a coil spring is sleeved between the outer fixed shell and the inner shell, and a shifting block is connected on the output gear. The invention has the beneficial effects that: the technical scheme ensures that the height of the automobile seat is more conveniently adjusted; the device has the advantages of simple structure, low production cost, high control precision and the like.

Based on the search of the above patent and the discovery of combining the prior art, although there are advantages such as simple structure, low production cost, high control precision, etc., the above car seat lifting device still has the following disadvantages in the actual use process, such as: 1. when a driver drives a car, the arms are in a suspended state for a long time, so that the muscle of the arms feels sour and painful, and the positions of the conventional seat armrests are not easy to adjust, so that the occupied space is large; 2. drivers are easy to fatigue when driving the waist of an automobile, and lack a reasonable waist support structure, usually, a back cushion is purchased for the waist, which wastes money; 3. the existing automobile seat backrest is fixed in height and cannot meet the requirements of different heights and posture characteristics of drivers, and the comfort level of the seat is low.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides a seat surface lifting device for an automobile seat, so as to solve the following disadvantages of the seat lifting device in the actual use process, such as: 1. when a driver drives a car, arms are in a suspended state for a long time, so that arm muscles feel sour, and the positions of the conventional seat armrests are difficult to adjust and occupy large space; 2. drivers are easy to fatigue when driving the waist of the automobile, lack a reasonable waist protecting structure, and usually buy a back cushion for the waist in addition, which wastes money; 3. the current car backrest height is fixed unchangeable, can't satisfy the use of different driver heights and posture characteristics, leads to the lower problem of seat comfort level.

The invention relates to a seat surface lifting device of an automobile seat, which has the purposes and effects that the invention is achieved by the following specific technical means:

a chair surface lifting device of an automobile chair comprises a chair seat, wherein armrest components are arranged on the left side and the right side of the chair seat, and the armrest components are symmetrically distributed; guide plates are arranged on two sides of the rear end of the chair seat, and the two guide plates are symmetrically distributed; the guide plate is rotationally connected with the chair seat through a rotating shaft and is controlled through an adjusting knob; an installation box is arranged between the two guide plates; a backrest is arranged between the two guide plates and is arranged above the installation box; a headrest is arranged at the top end of the backrest; a first adjusting structure is arranged at the rear part of the backrest; the mounting box is of a rectangular cavity structure, and a second adjusting mechanism and a lifting mechanism are arranged in the cavity of the mounting box; the lifting mechanism comprises a scissor rod, a second sliding rail and a second sliding sleeve, the second sliding rail is connected with the second sliding sleeve in a sliding mode, the second sliding sleeve is connected with the scissor rod in a rotating mode through a rotating shaft, and the scissor rod is connected with the second sliding rail in a sliding mode through the second sliding sleeve.

Further, the handrail assembly includes the swing arm, handrail board, damping cover and accomodates the groove, the swing arm rotates through pivot and seat support to through adjust knob control, the swing arm top has been seted up and has been accomodate the groove, accomodate the groove and be rectangle groove structure, and accomodate the inslot and be equipped with handrail board, handrail board passes through the damping cover and is connected with the rotation of swing arm.

Further, the deflector includes first sliding sleeve, connecting rod, dead lever, first mounting box and second mounting box, two equal fixed mounting in opposite sides of the deflector has two first sliding sleeves, be equipped with two connecting rods and two dead levers in the middle of the deflector, and connecting rod and dead lever all are parallel mode and distribute, first mounting box fixed mounting is between connecting rod and dead lever, second mounting box fixed mounting is between two dead levers.

Furthermore, the installation box comprises a waist backup plate, the installation box is fixedly installed at the front ends of the fixing rods at two positions, a waist backup plate is arranged at the position of the installation box opening, the bottom of the installation box cavity and the waist backup plate are fixedly connected with a second sliding rail, and the shearing fork rod is supported between the installation box and the waist backup plate.

Furthermore, the back includes first slide rail and screw thread sliding sleeve, back rear end intermediate position fixed mounting has the screw thread sliding sleeve, back left and right sides fixed mounting has first slide rail, and two first slide rails are the symmetric mode and distribute, first slide rail and first sliding sleeve phase-match, and the back passes through first slide rail and first sliding sleeve and deflector sliding connection.

Further, first regulation structure includes first lead screw, straight-teeth gear, turbine shaft pole and first hand wheel, first lead screw sets up in the back rear, and just first lead screw passes through the bearing and rotate with two connecting rods and be connected, first lead screw bottom fixed mounting has the straight-teeth gear, and the straight-teeth gear sets up in first mounting box, the turbine shaft pole sets up in first mounting box, and the turbine shaft pole is connected with the straight-teeth gear meshing, the turbine shaft pole passes through the bearing and rotates with first mounting box to be connected, and the turbine shaft pole passes first mounting box back wall to turbine shaft pole tip fixed mounting has first hand wheel.

Furthermore, the second adjusting mechanism comprises a second hand wheel, a bevel gear, a second screw rod and a sliding rod, a shaft rod of the second hand wheel is rotatably connected with the second mounting box through a bearing, and the end part of the shaft rod of the second hand wheel is in transmission connection with the second screw rod through the bevel gear.

Furthermore, the second lead screw and the bevel gear are arranged in a cavity of the mounting box, the second lead screw is rotatably connected with the mounting box through a bearing, a sliding rod is arranged on the second lead screw, the sliding rod is slidably connected with the second lead screw in a threaded manner, and the sliding rod is rotatably connected with the second sliding sleeve.

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

1. the swing arm is rotatably connected with the seat through the rotating shaft and is controlled by the adjusting knob, the top end of the swing arm is provided with a containing groove, the containing groove is of a rectangular groove structure, the containing groove is internally provided with the armrest plate, the armrest plate is rotatably connected with the swing arm through the damping sleeve, the swing arm is rotated upwards, the armrest plate is modulated to be in a parallel state, and the arm of a driver can be supported, so that the ache of the arm muscle of the automobile driven for a long time is relieved, the swing arm and the armrest plate are convenient to contain, and the occupied space is small;

2. the threaded sliding sleeves are fixedly arranged in the middle of the rear end of the backrest, the first sliding rails are fixedly arranged on the left side and the right side of the backrest, the two first sliding rails are symmetrically distributed, the first sliding rails are matched with the first sliding sleeves, and the backrest is in sliding connection with the guide plate through the first sliding rails and the first sliding sleeves, so that the backrest can be correspondingly adjusted in height according to the height and the posture characteristics of different drivers, and the comfort level of the drivers is improved;

3. when the backrest is used, the first hand wheel is rotated, and the straight gear and the first lead screw are rotated to enable the threaded sliding sleeve to drive the backrest to slide up and down along the first sliding rail, so that the height position of the backrest is adjusted;

4. the installation box is fixedly installed at the front ends of the two fixing rods, the waist backup plate is arranged at the box opening of the installation box, the bottom of the cavity of the installation box and the waist backup plate are fixedly connected with the second sliding rail, and the scissor rod is supported between the installation box and the waist backup plate;

5. because second lead screw and bevel gear set up in the install bin cavity, and the second lead screw passes through the bearing and is connected with the install bin rotation, be equipped with the slide bar on the second lead screw, and the slide bar passes through threaded mode and second lead screw sliding connection, and the slide bar rotates with the second sliding sleeve to be connected, in the time of the use, rotate the second hand wheel, rotate through the second lead screw, make the slide bar drive the second sliding sleeve and slide along the second slide rail on, utilize the scissors pole to promote the waist backup plate and carry out altitude mixture control, can adjust according to driver's use needs, guarantee the comfort level, and the structure is more reasonable.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic axial view of the present invention.

Fig. 2 is a schematic view of the rotational view structure drawn from fig. 1.

Fig. 3 is a schematic view of the armrest assembly of the present invention.

Fig. 4 is a schematic view of the backrest structure of the present invention.

Fig. 5 is a schematic view of the construction of the guide plate of the present invention.

Fig. 6 is a schematic structural view of a backrest, a guide plate and a first adjusting structure of the invention.

Fig. 7 is a schematic view of the structure of the installation box of the invention.

Fig. 8 is a schematic sectional structure view of the installation box of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a chair seat; 2. an armrest assembly; 201. swinging the arm; 202. a handrail plate; 203. a damping sleeve; 204. a receiving groove; 3. a guide plate; 301. a first sliding sleeve; 302. a connecting rod; 303. fixing the rod; 304. a first mounting box; 305. a second mounting box; 4. installing a box; 401. a waist back plate; 5. a backrest; 501. a first slide rail; 502. a threaded sliding sleeve; 6. a headrest; 7. a first adjustment structure; 701. a first lead screw; 702. a spur gear; 703. a turbine shaft; 704. a first hand wheel; 8. a second adjustment mechanism; 801. a second hand wheel; 802. a bevel gear; 803. a second screw rod; 804. a slide bar; 9. a lifting mechanism; 901. shearing a fork rod; 902. a second slide rail; 903. a second sliding sleeve; 10. and adjusting a knob.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, 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.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 8:

the invention provides a seat lifting device of an automobile seat, which comprises a seat 1, wherein armrest components 2 are arranged on the left side and the right side of the seat 1, and the armrest components 2 are symmetrically distributed; two sides of the rear end of the chair seat 1 are provided with guide plates 3, and the two guide plates 3 are distributed in a symmetrical mode; the guide plate 3 is rotationally connected with the chair seat 1 through a rotating shaft and is controlled by an adjusting knob 10; the guide plate 3 comprises a first sliding sleeve 301, a connecting rod 302, a fixed rod 303, a first mounting box 304 and a second mounting box 305, two first sliding sleeves 301 are fixedly mounted on opposite surfaces of two guide plates 3, two connecting rods 302 and two fixed rods 303 are arranged in the middle of the guide plate 3, the connecting rods 302 and the fixed rods 303 are distributed in a parallel mode, the first mounting box 304 is fixedly mounted between the connecting rods 302 and the fixed rods 303, and the second mounting box 305 is fixedly mounted between the two fixed rods 303; an installation box 4 is arranged between the two guide plates 3; a backrest 5 is arranged between the two guide plates 3, and the backrest 5 is arranged above the installation box 4; the top end of the backrest 5 is provided with a headrest 6; the back part of the backrest 5 is provided with a first adjusting structure 7; the installation box 4 is of a rectangular cavity structure, and a second adjusting mechanism 8 and a lifting mechanism 9 are arranged in the cavity of the installation box 4; the lifting mechanism 9 comprises a scissor rod 901, a second sliding rail 902 and a second sliding sleeve 903, the second sliding rail 902 is connected with the second sliding sleeve 903 in a sliding manner, the second sliding sleeve 903 is rotatably connected with the scissor rod 901 through a rotating shaft, and the scissor rod 901 is connected with the second sliding rail 902 through the second sliding sleeve 903 in a sliding manner; the second adjusting mechanism 8 comprises a second hand wheel 801, a bevel gear 802, a second screw 803 and a sliding rod 804, wherein a shaft rod of the second hand wheel 801 is rotatably connected with the second mounting box 305 through a bearing, and a shaft rod end of the second hand wheel 801 is in transmission connection with the second screw 803 through the bevel gear 802.

The armrest component 2 comprises a swing arm 201, an armrest plate 202, a damping sleeve 203 and a containing groove 204, the swing arm 201 is rotatably connected with the seat 1 through a rotating shaft and is controlled by an adjusting knob 10, the containing groove 204 is formed in the top end of the swing arm 201, the containing groove 204 is of a rectangular groove structure, the armrest plate 202 is arranged in the containing groove 204, the armrest plate 202 is rotatably connected with the swing arm 201 through the damping sleeve 203, the swing arm 201 rotates upwards, the armrest plate 202 is modulated to be in a parallel state, and can support the arm of a driver, so that the pain of the arm muscle of the driver in long-time driving is relieved, the swing arm 201 and the armrest plate 202 are convenient to contain, and the occupied space is small.

Wherein, install bin 4 includes waist backup plate 401, install bin 4 fixed mounting is in two dead lever 303 front ends, 4 case mouths of install bin department are equipped with waist backup plate 401, install bin 4 cavity bottom and waist backup plate 401 all with second slide rail 902 fixed connection, and scissor lever 901 supports between install bin 4 and waist backup plate 401, this device has set up waist backup plate 401 to highly can adjust, can protect the waist and reduce driving fatigue, and the driver needn't purchase the cushion in addition for the seat, save fund.

Wherein, back 5 includes first slide rail 501 and screw

thread sliding sleeve

502, 5 rear end intermediate position fixed mounting of back has screw

thread sliding sleeve

502, 5 left and right sides fixed mounting of back has first slide rail 501, and the first slide rail 501 in two is the symmetric mode and distributes, first slide rail 501 and first sliding sleeve 301 phase-match, and back 5 is through first slide rail 501 and first sliding

sleeve

301 and 3 sliding connection of deflector, it is thus visible, back 5 can be according to different driver heights and attitude characteristics, correspond and carry out altitude mixture control, thereby improve driver's comfort level.

Wherein, the first adjusting structure 7 includes a first lead screw 701, a spur gear 702, a turbine shaft rod 703 and a first hand wheel 704, the first lead screw 701 is disposed at the rear of the backrest 5, and the first lead screw 701 is rotatably connected with the two connecting rods 302 through a bearing, the bottom end of the first lead screw 701 is fixedly mounted with the spur gear 702, and the spur gear 702 is disposed in the first mounting box 304, the turbine shaft rod 703 is disposed in the first mounting box 304, and the turbine shaft rod 703 is meshed with the spur gear 702, the turbine shaft rod 703 is rotatably connected with the first mounting box 304 through a bearing, and the turbine shaft rod 703 penetrates through the rear wall of the first mounting box 304, and the end of the turbine shaft rod 703 is fixedly mounted with the first hand wheel 704, during use, the first hand wheel 704 is rotated, and the threaded sliding sleeve 502 is rotated through the spur gear 702 and the first lead screw 701, so as to drive the backrest 5 to slide up and down along the first sliding rail 501, thereby realizing the adjustment of the height position of the backrest 5.

Wherein, second lead screw 803 and bevel gear 802 set up in the cavity of installing bin 4, and second lead screw 803 passes through the bearing and is connected with installing bin 4 rotation, be equipped with slide bar 804 on the second lead screw 803, and slide bar 804 passes through threaded mode and second lead screw 803 sliding connection, and slide bar 804 rotates with second sliding sleeve 903 and is connected, during the use, rotate second hand wheel 801, rotate through second lead screw 803, make slide bar 804 drive second sliding sleeve 903 slide along second slide rail 902, utilize scissors pole 901 to promote waist backup plate 401 and carry out height control, can adjust according to driver's use needs, guarantee the comfort level, and the structure is more reasonable.

The specific use mode and function of the embodiment are as follows:

in the using process, firstly, the swing arm 201 is rotatably connected with the seat 1 through a rotating shaft and is controlled by the adjusting knob 10, the top end of the swing arm 201 is provided with a receiving groove 204, the receiving groove 204 is of a rectangular groove structure, an armrest plate 202 is arranged in the receiving groove 204, the armrest plate 202 is rotatably connected with the swing arm 201 through a damping sleeve 203, the swing arm 201 is rotated upwards, the armrest plate 202 is modulated to be in a parallel state, the arm of a driver can be supported, the pain feeling of the arm muscles of the driver in long-time driving can be relieved, the swing arm 201 and the armrest plate 202 are convenient to receive, and the occupied space is small;

meanwhile, a threaded sliding sleeve 502 is fixedly installed in the middle of the rear end of the backrest 5, first sliding rails 501 are fixedly installed on the left side and the right side of the backrest 5, the two first sliding rails 501 are symmetrically distributed, the first sliding rails 501 are matched with the first sliding sleeve 301, and the backrest 5 is in sliding connection with the guide plate 3 through the first sliding rails 501 and the first sliding sleeve 301, so that the backrest 5 can be correspondingly adjusted in height according to the height and the posture characteristics of different drivers, and the comfort level of the drivers is improved; the first screw rod 701 is arranged behind the backrest 5, the first screw rod 701 is rotatably connected with the two connecting rods 302 through bearings, a straight gear 702 is fixedly arranged at the bottom end of the first screw rod 701, the straight gear 702 is arranged in the first mounting box 304, a turbine shaft rod 703 is arranged in the first mounting box 304, the turbine shaft rod 703 is meshed with the straight gear 702 and is connected with the first mounting box 304 through bearings, the turbine shaft rod 703 is rotatably connected with the first mounting box 304 through bearings, the turbine shaft rod 703 penetrates through the rear wall of the first mounting box 304, and a first hand wheel 704 is fixedly arranged at the end part of the turbine shaft rod 703;

in addition, the installation box 4 is fixedly installed at the front ends of the two fixing rods 303, a waist backup plate 401 is arranged at the box opening of the installation box 4, the bottom of the cavity of the installation box 4 and the waist backup plate 401 are fixedly connected with a second slide rail 902, and a scissor rod 901 is supported between the installation box 4 and the waist backup plate 401; second lead screw 803 and bevel gear 802 set up in the cavity of installing bin 4, and second lead screw 803 passes through the bearing and is connected with installing bin 4 rotation, be equipped with slide bar 804 on the second lead screw 803, and slide bar 804 passes through threaded mode and second lead screw 803 sliding connection, and slide bar 804 rotates with second sliding sleeve 903 and is connected, in use, rotate second hand wheel 801, rotate through second lead screw 803, make slide bar 804 drive second sliding sleeve 903 slide along second slide rail 902, utilize scissors pole 901 to promote waist backup plate 401 and carry out height control, can adjust according to driver's use needs, guarantee the comfort level, and the structure is more reasonable.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a seat face elevating gear of car seat which characterized in that: the chair comprises a chair seat (1), wherein handrail components (2) are arranged on the left side and the right side of the chair seat (1), and the two handrail components (2) are symmetrically distributed; two sides of the rear end of the chair seat (1) are provided with guide plates (3), and the two guide plates (3) are symmetrically distributed; the guide plate (3) is rotationally connected with the chair seat (1) through a rotating shaft and is controlled through an adjusting knob (10); an installation box (4) is arranged between the two guide plates (3); a backrest (5) is arranged between the two guide plates (3), and the backrest (5) is arranged above the installation box (4); a headrest (6) is arranged at the top end of the backrest (5); a first adjusting structure (7) is arranged at the rear part of the backrest (5); the mounting box (4) is of a rectangular cavity structure, and a second adjusting mechanism (8) and a lifting mechanism (9) are arranged in the cavity of the mounting box (4); the lifting mechanism (9) comprises a scissor rod (901), a second sliding rail (902) and a second sliding sleeve (903), the second sliding rail (902) is connected with the second sliding sleeve (903) in a sliding manner, the second sliding sleeve (903) is rotatably connected with the scissor rod (901) through a rotating shaft, and the scissor rod (901) is slidably connected with the second sliding rail (902) through the second sliding sleeve (903);

the armrest component (2) comprises a swing arm (201), an armrest plate (202), a damping sleeve (203) and a containing groove (204), the swing arm (201) is rotatably connected with the seat (1) through a rotating shaft and is controlled by an adjusting knob (10), the containing groove (204) is formed in the top end of the swing arm (201), the containing groove (204) is of a rectangular groove structure, the armrest plate (202) is arranged in the containing groove (204), and the armrest plate (202) is rotatably connected with the swing arm (201) through the damping sleeve (203);

the guide plate (3) comprises a first sliding sleeve (301), a connecting rod (302), a fixed rod (303), a first mounting box (304) and a second mounting box (305), two first sliding sleeves (301) are fixedly mounted on opposite surfaces of two guide plates (3), the two connecting rods (302) and the two fixed rods (303) are arranged in the middle of the guide plate (3), the connecting rods (302) and the fixed rods (303) are distributed in a parallel mode, the first mounting box (304) is fixedly mounted between the connecting rods (302) and the fixed rods (303), and the second mounting box (305) is fixedly mounted between the two fixed rods (303);

the mounting box (4) comprises a waist rest plate (401), the mounting box (4) is fixedly mounted at the front ends of two fixing rods (303), the waist rest plate (401) is arranged at the box opening of the mounting box (4), the bottom of a cavity of the mounting box (4) and the waist rest plate (401) are fixedly connected with a second sliding rail (902), and a scissor rod (901) is supported between the mounting box (4) and the waist rest plate (401);

the backrest (5) comprises a first sliding rail (501) and a threaded sliding sleeve (502), the threaded sliding sleeve (502) is fixedly mounted in the middle of the rear end of the backrest (5), the first sliding rails (501) are fixedly mounted on the left side and the right side of the backrest (5), the two first sliding rails (501) are symmetrically distributed, the first sliding rails (501) are matched with the first sliding sleeve (301), and the backrest (5) is connected with the guide plate (3) in a sliding mode through the first sliding rails (501) and the first sliding sleeve (301);

the first adjusting structure (7) comprises a first screw rod (701), a straight gear (702), a turbine shaft rod (703) and a first hand wheel (704), the first screw rod (701) is arranged behind the backrest (5), the first screw rod (701) is rotatably connected with two connecting rods (302) through bearings, the straight gear (702) is fixedly installed at the bottom end of the first screw rod (701), the straight gear (702) is arranged in the first installation box (304), the turbine shaft rod (703) is meshed with the straight gear (702) and connected with the first installation box (304) through bearings, the turbine shaft rod (703) is rotatably connected with the first installation box (304) through bearings, the turbine shaft rod (703) penetrates through the rear wall of the first installation box (304), and the first hand wheel (704) is fixedly installed at the end part of the turbine shaft rod (703);

the second adjusting mechanism (8) comprises a second hand wheel (801), a bevel gear (802), a second screw rod (803) and a sliding rod (804), a shaft rod of the second hand wheel (801) is rotatably connected with the second mounting box (305) through a bearing, and the shaft rod end of the second hand wheel (801) is in transmission connection with the second screw rod (803) through the bevel gear (802);

the second screw rod (803) and the bevel gear (802) are arranged in a cavity of the installation box (4), the second screw rod (803) is rotatably connected with the installation box (4) through a bearing, a sliding rod (804) is arranged on the second screw rod (803), the sliding rod (804) is slidably connected with the second screw rod (803) in a threaded mode, and the sliding rod (804) is rotatably connected with a second sliding sleeve (903);

in the using process, firstly, the swing arm 201 is rotatably connected with the seat 1 through a rotating shaft and is controlled by the adjusting knob 10, the top end of the swing arm 201 is provided with a containing groove 204, the containing groove 204 is of a rectangular groove structure, the handrail plate 202 is arranged in the containing groove 204, the handrail plate 202 is rotatably connected with the swing arm 201 through the damping sleeve 203, the swing arm 201 is rotated upwards, the handrail plate 202 is modulated to be in a parallel state, the arm of a driver can be supported, and therefore the pain of the arm muscles of the driver in long-time driving is relieved, the swing arm 201 and the handrail plate 202 are convenient to contain, and the occupied space is small;

meanwhile, a threaded sliding sleeve 502 is fixedly installed in the middle of the rear end of the backrest 5, first sliding rails 501 are fixedly installed on the left side and the right side of the backrest 5, the two first sliding rails 501 are symmetrically distributed, the first sliding rails 501 are matched with the first sliding sleeve 301, and the backrest 5 is in sliding connection with the guide plate 3 through the first sliding rails 501 and the first sliding sleeve 301, so that the backrest 5 can be correspondingly adjusted in height according to the height and posture characteristics of different drivers, and the comfort level of the drivers is improved; the first lead screw 701 is arranged behind the backrest 5, the first lead screw 701 is rotatably connected with the two connecting rods 302 through bearings, a spur gear 702 is fixedly arranged at the bottom end of the first lead screw 701, the spur gear 702 is arranged in the first mounting box 304, a turbine shaft rod 703 is arranged in the first mounting box 304, the turbine shaft rod 703 is meshed with the spur gear 702, the turbine shaft rod 703 is rotatably connected with the first mounting box 304 through bearings, the turbine shaft rod 703 penetrates through the rear wall of the first mounting box 304, and a first hand wheel 704 is fixedly arranged at the end part of the turbine shaft rod 703;