CN116784615A - Chair seat - Google Patents

Abstract

The application discloses a seat, which comprises a seat board mechanism, a back rest mechanism and a linkage assembly, wherein the seat board mechanism comprises a seat board and a chassis assembly, the chassis assembly comprises a supporting seat, and the seat board can move up and down relative to the supporting seat; the backrest mechanism comprises a first support body, a second support body and a backrest, wherein the lower end of the first support body is hinged with the rear end of the seat board, the upper end of the first support body is hinged with the lower end of the second support body, the backrest is connected to the second support body, the first support body comprises a first shell, and a transmission gear is arranged in the first shell; the rear end of bedplate is equipped with the first gear with drive gear looks adaptation, and the lower extreme of second supporter is equipped with the second gear with drive gear looks adaptation, and the linkage subassembly includes the drive seat, and the one end and the bedplate of drive seat are articulated, and another one end is connected with first supporter, drives the drive seat and rotates when the bedplate goes up and down, and the drive seat drives first supporter and rotates this moment. The application can ensure the fixation of the back-rest running track and improve the assembly efficiency of the seat.

Description

a kind of seat

Technical field

The present invention relates to the field of seats, and in particular to a seat.

Background technique

Seats are common items in life and are widely used in various occasions. At present, people not only pursue the comfort of seats, but also pay more attention to the impact of seats on human health. When the seats with seat-back linkage are in use, the backrest can move forward/backward in parallel, which not only provides good support for the backs of people of different body types, but also helps users maintain a correct sitting posture on the seat.

The Chinese patent publication number is: CN215304359U and the publication date is: 2021-12-28. The invention discloses an adaptive seat depth adjustment seat. In this patent, the seat is movably connected to the fixed support through a first link assembly. The chair seat can rise or fall relative to the fixed support; the chair back is movably connected to the fixed support through a second link assembly, so that the chair back can translate forward and backward in the seat depth direction of the chair seat. This application uses two sets of four links The structure enables the chair back to translate and follow the human body's back. The two four-link structures have more than ten hinge points and are difficult to assemble, which makes them expensive and not conducive to popularization. In addition, the two four-link mechanisms have many kinematic pairs. , leading to large accumulation of errors. Especially after long-term use, the running trajectory will deviate, affecting the support effect.

Contents of the invention

In order to solve the above technical problems, the object of the present invention is to provide a seat that can realize that the backrest can move forward/rearward in parallel through the first gear, the second gear and the transmission gear. The gear has the advantages of high transmission accuracy and smooth transmission. , which can ensure that the forward/rearward movement trajectory of the backrest is fixed; the installation of the gear is less difficult, which can improve the assembly efficiency of the seat. In addition, when the seat fails, it is easy to repair the seat.

The technical solution of the present invention is implemented as follows:

A seat including:

The seat plate mechanism includes a seat plate and a chassis assembly. The chassis assembly includes a support seat for inserting the air rod. The seat plate is connected above the support seat and the seat plate can move up and down relative to the support seat;

The backrest mechanism includes a first support body, a second support body and a backrest. The lower end of the first support body is hingedly connected to the rear end of the support seat. The upper end of the first support body is connected to the rear end of the second support body. The lower end is hinged, and the backrest is vertically connected to the second support body. The first support body includes a first housing with a first cavity, and a transmission gear is rotated in the first housing;

A first gear is fixedly provided at the rear end of the support base, and the transmission gear meshes with the first gear;

The second gear is fixedly provided at the lower end of the second support body, the transmission gear meshes with the second gear, and the transmission ratio between the first gear and the transmission gear is the same as the transmission ratio between the second gear and the transmission gear. The transmission ratio is the same;

The linkage assembly includes a transmission seat. One end of the transmission seat is hingedly connected to the seat plate. The other end of the transmission seat is rotationally connected to the first support body. When the seat plate is raised and lowered, the transmission seat is driven to rotate. At this time, the transmission seat The first support body is driven to rotate. When the first support body rotates, the second gear is driven to rotate through the transmission gear, thereby driving the second support body to rotate. The rotation direction of the second support body is opposite to the rotation direction of the first support body, so that the back Keep moving horizontally.

In this solution, when the human body sits on the seat, the seat plate will drop, and then the seat plate drives the transmission seat to rotate downward, and then the transmission seat drives the first support body to rotate downward, which is now located inside the first support body The transmission gear rotates counterclockwise, and the second support body descends and moves forward horizontally. It can be understood that the transmission gear keeps meshing with the first gear and the second gear when rotating and rotates in the opposite direction synchronously. Since the first gear and the transmission gear The transmission ratio is the same as the transmission ratio between the second gear and the transmission gear, so that the angle of the second support body remains unchanged, ensuring that the backrest is always in a vertical state or a preset tilted state.

Preferably, the rear end of the support base is fixed with a first connection base, the lower end of the first support body is hingedly connected with the first connection base, and the first connection base is provided with a first groove, so The first gear is fixedly arranged in the first groove. By arranging the first groove on the first connecting seat, the installation difficulty of the first gear is reduced and the stability of the first gear after installation is improved. At the same time, the first gear is installed in a hidden manner, avoiding the installation of the first gear. Exposed, it improves the neatness of the appearance of the seat.

Preferably, the transmission seat is provided with first shaft holes and second shaft holes at intervals, the first shaft hole is provided with a first rotating shaft, and the second shaft hole is provided with a second rotating shaft. The seat is hingedly connected to the rear end of the seat plate through the second rotating shaft; the left and right side walls of the first connecting seat are symmetrically provided with arcuate chute, and the arcuate chute runs through the side wall of the first connecting seat. , the lower end of the first support body extends downward with two oppositely spaced axle seat plates, the first connecting seat is between the two axle seat plates, the axle seat plate and the first connecting seat are supported by The shaft is rotationally connected, and the first rotating shaft passes through the arc chute and is inserted into a preset socket on the axis seat plate of the first support body. When the seat plate drives the transmission seat to move, the transmission seat passes through the first rotating shaft. Pull the axle seat plate to rotate the axle seat plate and the first support body around the support axis. It can be understood that the arc-shaped chute is arc-shaped, and the arc center of the arc-shaped chute coincides with the center of the first gear. The arc-shaped chute limits the rotation direction and range of the first support body.

Preferably, the upper end of the first support body is provided with a second connection seat, the second connection seat includes a second groove, and the second gear is rotatably connected in the second groove. By arranging the second groove on the second connection seat, the installation difficulty of the second gear is reduced and the stability of the second gear after installation is improved. At the same time, the second gear is installed in a hidden manner, avoiding the installation of the second gear. Exposed, it improves the neatness of the appearance of the seat.

Preferably, the lower end of the front side of the first housing is provided with a notch, and the notch is adapted to the transmission seat. By providing a gap, a rotation space is provided for the first support body.

Preferably, the first gear, the second gear and the transmission gear are all incomplete gears, the gear teeth of the first gear are arranged upward, and the gear teeth of the second gear are arranged downward. In actual work, since the first support body does not perform circular motion, incomplete gears can be used for the first gear, the second gear and the transmission gear to meet the requirements. The teeth of the first gear and the second gear are sector-shaped, and the transmission gear The gear is in the shape of a long strip, and the transmission gear is arranged in a strip shape to facilitate installation in the first cavity.

Preferably, a mounting hole is provided in the middle of the transmission gear, a third rotating shaft matching the mounting hole is provided in the left-right direction inside the first housing, and shafts are provided on both sides of the third rotating shaft. The cushion block and the shaft cushion block are integrally formed on both sides of the first housing. After the two ends of the third rotating shaft are pressed into the preset grooves on the shaft cushion block, the cover of the third rotating shaft is locked on the shaft cushion block. The rotating shaft does not break away from the shaft spacers, and the transmission gear is located between the two shaft spacers.

Preferably, a connecting rod bracket is provided between the support seat and the seat plate. The connecting rod bracket includes two parallel and inclined support brackets, and the two support brackets are spaced apart along the front and rear direction. The lower end of the support frame is hinged with the chassis support base, and the upper end of the support frame is hinged with the bottom surface of the seat plate; the support base, the two support frames and the seat plate form a four-bar linkage.

Preferably, a gas spring is also provided in the support seat. One end of the gas spring is hinged to the support seat, and the other end of the gas spring is hinged to the seat plate or support frame. The gas spring is in an open state. In this state, the seat plate is pressed down under the action of external force so that it is linked with the backrest mechanism, and the gas spring contracts and generates damping elastic force; when the external force disappears, the seat plate rises and resets under the action of the damping elastic force of the gas spring. ; When the gas spring is in the closed state, the seat plate and the backrest mechanism are locked and stay in the current state. During actual operation, the gas spring drives the connecting rod bracket to rotate, and the connecting rod bracket drives the seat plate to rise and fall. In this embodiment, the bottom surface of the seat plate is surrounded by a folding edge, and the chassis is provided with a recessed cavity. The folding edges are fastened in the recessed cavity. The seat plate, folding edges and recessed cavity form an accommodation space, and the connecting rod bracket is located in the recessed cavity. In the installation space, it should be noted that the lifting height of the seat plate is not greater than the height of the folding edge to ensure that the connecting rod bracket and gas spring are not exposed, which improves the service life of the connecting rod bracket and the neat appearance of the seat, and avoids the problem of connecting the rod bracket and the gas spring. Possible hazards caused by pole supports while working. In addition, the unlocking and locking of the gas spring is controlled by the handle, making it convenient for the user to control the gas spring while sitting on the seat.

Preferably, the second support body includes a second housing with a second cavity, the backrest includes a support rod, and part of the support rod is located in the second cavity.

The principles and beneficial effects of the present invention adopting the above technical solution are:

1. This seat realizes the seat back linkage of the seat by setting a transmission gear on the first support rod, a first gear on the rear end of the seat plate, a second gear on the lower end of the second support body, and a linkage component, that is, The backrest can move forward/rearward in parallel with the seat plate. Compared with the multiple link structures used in existing seat-back linkage seats, the gear installation is more convenient, which greatly improves the assembly efficiency of the seat. In addition, the transmission of the gear High precision ensures good operating stability of the backrest.

2. By arranging the first connecting seat and the second connecting seat, the exposure of the first gear and the second gear is avoided, which improves the service life of the gear and the neat appearance of the seat.

Description of the drawings

Figure 1 is a schematic diagram of the seat;

Figure 2 is a cross-sectional view of the seat;

Figure 3 is an internal schematic diagram of the seat plate mechanism and backrest mechanism;

Figure 4 is a schematic diagram of the seat plate mechanism, backrest mechanism and air rod;

Figure 5 is a schematic diagram of the seat plate mechanism and the backrest mechanism;

Figure 6 is an exploded schematic diagram of the seat plate mechanism and backrest mechanism;

Figure 7 is a cross-sectional view of the first support body and the second support body.

Figure 8 is a front view of the interior of the first support body;

Figure 9 is a schematic diagram of the chassis assembly;

Figure 10 is a schematic diagram of the connecting rod bracket and gas spring;

Figure 11 is a schematic diagram of the seat plate;

Figure 12 is a schematic diagram of the first housing;

Figure 13 is a schematic diagram of the transmission seat;

Figure 14 is a schematic diagram of the pad;

Figure 15 is a schematic diagram of the change of backrest status;

Figure 16 is a schematic diagram of the end cover and baffle mechanism;

Figure 17 is a schematic diagram of the end cover and baffle mechanism from another angle;

Figure 18 is an exploded schematic diagram of the end cover and baffle mechanism.

Each reference number in the figure is:

1. Seat plate mechanism; 2. Seat plate; 3. Support seat; 4. Backrest mechanism; 5. First support body; 6. Second support body; 7. Backrest; 8. First shell; 9. First cavity; 10. First gear; 11. Second gear; 12. Transmission seat; 13. First connection seat; 14. First groove; 15. Second connection seat; 16. Second groove; 17. First shaft hole; 18. Second shaft hole; 19. Arc chute; 20. Notch; 21. Transmission gear; 22. Shaft spacer; 23. Connecting rod bracket; 24. Support frame; 25. Air Spring; 26. Second cavity; 27. Second shell; 28. Folding edge; 29. Recessed cavity; 30. Axle seat plate; 31. Support rod; 32. Installation hole; 33. Baffle; 34. Handle ; 35. Air rod; 36. Connecting block; 37. Chute; 38. Slider; 39. End cover; 40. Hanging shaft; 41. Third shaft hole; 42. Jack.

Implementation

In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, as long as there is no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. Limitations of Examples.

The specific embodiments of the present invention are as follows: As shown in Figures 1 to 18, the present invention provides a seat, including:

The seat plate mechanism 1 includes a seat plate 2 and a chassis assembly. The chassis assembly includes a support seat 3 for inserting the air rod 35. The seat plate 2 is connected above the support seat 3 and can move up and down relative to the support seat 3;

The backrest mechanism 4 includes a first support body 5, a second support body 6 and a backrest 7. The lower end of the first support body 5 is hinged with the rear end of the support base 3, and the upper end of the first support body 5 is hinged with the second support body. The lower end of 6 is hinged, and the backrest 7 is vertically connected to the second support body 6. The first support body 5 includes a first housing 8 with a first cavity 9, and a transmission gear 21 is rotated in the first housing 8. , the second support body 6 includes a second housing 27 with a second cavity 26, the backrest 7 includes a support rod 31, and part of the support rod 31 is located in the second cavity 26;

The first gear 10 is fixedly installed at the rear end of the support base 3, and the transmission gear 21 meshes with the first gear 10;

The second gear 11 is fixedly arranged at the lower end of the second support body 6. The transmission gear 21 meshes with the second gear 11. The transmission ratio between the first gear 10 and the transmission gear 21 is the same as the transmission ratio between the second gear 11 and the transmission gear 21. same;

The linkage assembly includes a transmission seat 12. One end of the transmission seat 12 is hinged with the seat plate 2. The other end of the transmission seat 12 is rotationally connected with the first support body 5. When the seat plate 2 rises and falls, it drives the transmission seat 12 to rotate. At this time, the transmission seat 12 The first support body 5 is driven to rotate. When the first support body 5 rotates, the second gear 11 is driven to rotate through the transmission gear 21, thereby driving the second support body 6 to rotate. The rotation direction of the second support body 6 is consistent with that of the first support body. 5 rotates in the opposite direction, so that the backrest 7 maintains translation in the horizontal direction.

In this solution, when the human body sits on the seat, the seat plate 2 will drop, and then the seat plate 2 drives the transmission seat 12 to rotate downward, and then the transmission seat 12 drives the first support body 5 to rotate downward. At this time, it is located at The transmission gear 21 inside the first support body 5 rotates counterclockwise, and the second support body 6 descends and moves forward horizontally. It can be understood that the transmission gear 21 maintains meshing and synchronization with the first gear 10 and the second gear 11 when rotating. In reverse rotation, since the transmission ratio between the first gear 10 and the transmission gear 21 is the same as the transmission ratio between the second gear 11 and the transmission gear 21, the angle of the second support body 6 remains unchanged, ensuring that the backrest 7 is always upright. state. It can be understood that when the driving mechanism drives the seat plate 2 to rise, the above-mentioned components operate in reverse direction so that the second support body 6 rises and moves backward horizontally, which will not be described again here. The first gear 10 , the second gear 11 and the transmission gear 21 are all incomplete gears. The gear teeth of the first gear 10 are arranged upward, and the gear teeth of the second gear 11 are arranged downward. In actual work, since the first support body 5 does not perform circular motion, the first gear 10, the second gear 11 and the transmission gear 21 can meet the requirements by using incomplete gears, in which the wheels of the first gear 10 and the second gear 11 The teeth are in a sector shape, and the transmission gear 21 is in a strip shape. By arranging the transmission gear 21 in a strip shape, it is convenient to install it in the first cavity 9 . Further, as shown in Figure 13, the state of the first support body 5 when rotating includes a forward tilt state and a backward tilt state. When the first support body 5 is in the forward tilt state, the forward gear teeth on the first gear 10 The gear teeth at the lower end of the transmission gear 21 are meshed with the front gear teeth, and the rear gear teeth of the second gear 11 mesh with the gear teeth at the upper end of the transmission gear 21 at the rear; when the first support body 5 is in a backward tilted state, the first support body 5 is in a backward tilted state. The rear gear teeth on the gear 10 mesh with the rear gear teeth on the lower end of the transmission gear 21 , and the front gear teeth on the second gear 11 mesh with the forward gear teeth on the upper end of the transmission gear 21 . In addition, the length of the transmission gear 21 determines the transmission ratio of the first gear 10 and the second gear 11; specifically, the length of the transmission gear 21 is proportional to the transmission ratio of the first gear 10 and the second gear 11. It should be noted that the front and rear in this embodiment refer to the front and rear of the seat along the depth direction of the seat itself, and the up and down refer to the up and down along the height direction of the seat itself.

As shown in Figures 6 and 9, the rear end of the support base 3 is fixed with a first connection base 13. The lower end of the first support body 5 is hingedly connected to the first connection base 13. The first connection base 13 is provided with a first recess. The first gear 10 is fixedly arranged in the first groove 14. The upper end of the first support body 5 is provided with a second connection seat 15. The second connection seat 15 includes a second groove 16. The second gear 11 is rotatably connected in the second groove 16 . By arranging the first groove 14 on the first connecting seat 13, the installation difficulty of the first gear 10 is reduced and the stability of the first gear 10 after installation is improved. At the same time, the first gear 10 is installed in a hidden manner, which avoids The exposure of the first gear 10 is eliminated, and the second groove 16 is provided on the second connecting seat 15, which reduces the installation difficulty of the second gear 11 and improves the stability of the second gear 11 after installation, while achieving the second The hidden installation of gear 11 avoids the exposure of the second gear 11 and improves the neatness of the appearance of the seat.

As shown in Figure 13, the transmission base 12 is provided with first shaft holes 17 and second shaft holes 18 at intervals. The first shaft hole 17 is provided with a first rotating shaft, and the second shaft hole 18 is provided with a second rotating shaft. The seat 12 is hingedly connected to the rear end of the seat plate 2 through the second rotating shaft; the left and right side walls of the first connecting seat 13 are symmetrically provided with arcuate chute 19, and the arcuate chute 19 penetrates the side wall of the first connecting seat 13. The lower end of a support body 5 extends downward with two oppositely spaced axle seat plates 30. The first connecting seat 13 is located between the two axle seat plates 30. The axle seat plate 30 is provided with a rotating shaft hole 43. The rotating shaft hole 43 There is a support shaft inside, and the axle seat plate 30 and the first connection seat 13 are rotationally connected through the support shaft. The first rotating shaft passes through the arc chute 19 and is inserted into the preset socket on the axle seat plate 30 of the first support body 5 42. When the seat plate 2 drives the transmission seat 12 to move, the transmission seat 12 pulls the axle seat plate 30 through the first rotating shaft, so that the axle seat plate 30 and the first support body 5 rotate around the support axis together. It can be understood that the arc-shaped chute 19 is arc-shaped, and the arc center of the arc-shaped chute 19 coincides with the center of the first gear 10. The arc-shaped chute 19 limits the rotation direction and rotation range of the first support body 5. .

As shown in FIG. 6 , an end cover 39 is detachably provided on the front side of the first housing 8 , and a gap 20 is formed between the end cover 39 and the transmission seat 12 . The notch 20 is adapted to the transmission seat 12. By providing the notch 20, the first support body 5 is allowed to rotate. The end cover 39 is detachably connected to the first housing 8 to facilitate access to the first cavity 9. The transmission gear 21 inside is replaced and repaired. In this embodiment, the first housing 8 is provided with an anti-pinch mechanism. The anti-pinch mechanism includes a baffle 33 . The baffle 33 is slidably disposed on the end cover 39 along the length direction of the notch 20 . The baffle 33 corresponds to the notch 20 , the width of the baffle 33 is not less than the width of the notch 20, and the length of the baffle 33 is not less than the length of the notch 20. When the first support body 5 rotates, the baffle 33 slides up/down with the rotation of the first support body 5 and The lower edge of the baffle 33 is always in contact with the top surface of the transmission seat 12. The seat plate 2 of the seat is connected to the first support body 5 through the transmission seat 12, and the second support body 6 is connected to the first support body 5. When the seat plate 2 rises and falls, it drives the transmission seat 12, and then the transmission seat 12 drives the first support body 5 to rotate forward/backward. It can be understood that when the transmission seat 12 rotates forward, the distance between the upper edge of the notch 20 and the transmission seat 12 Gradually decrease. At this time, the lower edge of the baffle 33 contacts the transmission seat 12 and is pushed upward by the transmission seat 12. At this time, the baffle 33 slides upward to retract the first support body 5. When the transmission seat 12 rotates forward, the gap The distance between the upper edge of 20 and the transmission seat 12 gradually increases. At this time, the baffle 33 slides downward and moves out of the first support body 5 . During the above process, the lower edge of the baffle 33 is always in contact with the top surface of the transmission seat 12 , thus covering the notch 20 at all times and eliminating the need for manpower to adjust the position of the baffle 33 . By setting the baffle 33 , the first gear 10 and the transmission are prevented from interfering with each other. The gear 21 clamps people's clothes or hands when working. By setting the width of the baffle 33 to be no less than the width of the notch 20 and the length of the baffle 33 to be no less than the length of the notch 20, it is ensured that the baffle 33 can completely cover the notch 20. Specifically, two connecting blocks 36 are provided symmetrically on the inner side of the end cover 39 of the first support body 5 . The connecting blocks 36 are arranged along the length direction of the notch 20 . The inner side wall of the connecting block 36 is provided with a chute 37 along its length direction. , the left and right side walls of the baffle 33 are symmetrically provided with sliders 38. The sliders 38 are located at the top of the side walls of the baffle 33. The sliders 38 correspond to the chute 37 one by one, and the slider 38 slides in the corresponding chute 37. . By providing two connecting blocks 36, the stability of the baffle 33 when sliding is improved. In this embodiment, the slider 38 is a cylindrical slider, and the bottom end of the slide groove 37 has an arc-shaped groove that matches the slider 38 . When the slide block 38 slides in the slide groove 37 , the slide block 38 can rotate in the slide groove 37 . In addition, there is a movable gap between the slider 38 and the slide groove 37 in the thickness direction of the slider 38 . Since there is a movable gap between the slider 38 and the slide groove 37 , the slider 38 can slide smoothly in the slide groove 37 . It should be noted that the rotation range of the first support body 5 is from 45 degrees to 135 degrees. No matter what angle the first support body 5 is at, the slider 38 can move in the chute 37 driven by the gravity of the baffle 33 . Slide down. In the solution, the upper end of the chute 37 is connected to the top surface of the connecting block 36 , the lower end of the chute 37 is not connected to the bottom surface of the connecting block 36 , and the length of the chute 37 is not less than the length of the baffle 33 . During actual installation, the slider 38 enters the chute 37 through the top surface of the connecting block 36, making installation easy. By setting the length of the chute 37 to be no less than the length of the baffle 33, it is ensured that the baffle 33 can be completely retracted into the first support body. The outer surface of the baffle 33 is adapted to the inner side of the end cover 39 of the first support body 5 . The inner side wall of the end cap 39 of the first support body 5 has an inclination or arc, and the inclination or arc of the outer surface of the baffle 33 is consistent with the inclination or arc of the first support body 5, so that the baffle 33 can move along the first support body 5. One support body 5 slides, and after the baffle 33 slides out of the first support body 5 , the connection between the baffle 33 and the end cover 39 of the first support body 5 is ensured to be high. In this embodiment, hanging shafts 40 are protrudingly provided on both sides of the lower end of the baffle 33, third shaft holes 41 are provided on the left and right inner walls of the first groove, and both ends of the hanging shaft 40 are respectively rotatably arranged on the third shaft. Hole 41. During actual operation, the lower end of the baffle 33 is rotated to set the third axis hole 41 and the lower end surface of the baffle 33 is always in contact with the top surface of the transmission seat 12 .

As shown in Figures 3, 8 and 14, a mounting hole 32 is provided in the middle of the transmission gear 21, and a third rotating shaft matching the mounting hole 32 is provided inside the first housing 8 along the left and right directions. There are shaft pads 22 on both sides respectively. The shaft pads 22 are integrally formed on both sides of the first housing 8. After the two ends of the third rotating shaft are pressed into the preset grooves on the shaft pads 22, they are passed through the The cover is locked on the shaft spacer block 22 so that the third rotating shaft does not break away from the shaft spacer block 22 , and the transmission gear 21 is located between the two shaft spacer blocks 22 . By providing the shaft spacer 22, the transmission gear 21 is prevented from shaking in the left and right direction when rotating, further improving the stability of the seat back linkage. In this embodiment, two shaft pads 22 are sleeved on the third rotating shaft and are respectively located on both sides of the transmission gear 21. It should be noted that the shaft pads 22 can also be arranged on one side of the third rotating shaft. The function of the spacer block 22 is only to fill the gap between the left and right side walls of the transmission gear 21 and the inner wall of the first cavity 9. The installation position and size of the shaft spacer block 22 are not limited and can be adjusted according to actual production needs.

As shown in Figure 10, there is a connecting rod bracket 23 between the support base 3 and the seat plate 2. The connecting rod bracket 23 includes two parallel and inclined supporting brackets 24. The two supporting brackets 24 are spaced apart along the front and rear direction. The supporting brackets 24 The lower end of the support base 3 is hinged, and the upper end of the support frame 24 is hinged with the bottom surface of the seat plate 2; the support base 3, the two support frames 24 and the seat plate 2 form a four-bar linkage mechanism, and a gas spring 25 is also provided in the support base 3. , one end of the gas spring 25 is hinged with the support base 3, and the other end of the gas spring 25 is hinged with the seat plate 2 or the support frame 24. When the gas spring 25 is in the open state, the seat plate 2 is pressed down under the action of external force so that it is pressed against the back. Mechanism 4 is linked, and the gas spring 25 contracts and generates a damping elastic force; when the external force disappears, the seat plate 2 rises and resets under the damping elastic force of the gas spring 25; when the gas spring 25 is in a closed state, the seat plate 2 and the backrest mechanism 4 are locked Stay in the current state. During actual work, the gas spring 25 drives the connecting rod bracket 23 to rotate, and the connecting rod bracket 23 drives the seat plate 2 to rise and fall. Since the support base 3, the two support frames 24 and the seat plate 2 form a four-bar linkage, when the seat plate of the seat When the backrest 2 and the backrest 7 are linked, the descending height of the seat plate 2 is basically the same as the descending height of the backrest 7, which will not cause the user to have a "back rubbing" feeling and improve the comfort of using the seat. In this embodiment, the bottom surface of the seat plate 2 is surrounded by a folding edge 28, and a recessed cavity is provided on the chassis. The folding edge 28 is fastened in the recessed cavity 29, and the seat plate 2, the folding edge 28 and the recessed cavity 29 form an accommodation space. space, the connecting rod bracket 23 is located in the accommodation space. It should be noted that the lifting height of the seat plate 2 is not greater than the height of the folding edge 28 to ensure that the connecting rod bracket 23 and the gas spring 25 are not exposed, thereby improving the connecting rod bracket 23 The service life and the neat appearance of the seat are ensured, and the possible dangers caused by the connecting rod bracket 23 during operation are avoided. In addition, the gas spring 25 is controlled to unlock and lock through the handle 34, making it convenient for the user to control the gas spring 25 while sitting on the seat.

The present invention and its embodiments are schematically described above. This description is not limiting. What is shown in the drawings is only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired by the invention and without departing from the spirit of the invention, can devise structural methods and embodiments similar to the technical solution without inventiveness, they shall all fall within the protection scope of the invention. .

Claims (10)

1. A seat, comprising:

the seat board mechanism comprises a seat board and a chassis assembly, the chassis assembly comprises a supporting seat for inserting an air rod, the seat board is connected above the supporting seat, and the seat board can move up and down relative to the supporting seat;

the backrest mechanism comprises a first support body, a second support body and a backrest, wherein the lower end of the first support body is hinged with the rear end of the support seat, the upper end of the first support body is hinged with the lower end of the second support body, the backrest is vertically connected to the second support body, the first support body comprises a first shell with a first cavity, and a transmission gear is rotationally arranged in the first shell;

the first gear is fixedly arranged at the rear end of the supporting seat, and the transmission gear is meshed with the first gear;

the second gear is fixedly arranged at the lower end of the second support body, the transmission gear is meshed with the second gear, and the transmission ratio of the first gear to the transmission gear is the same as that of the second gear to the transmission gear;

the linkage assembly comprises a transmission seat, one end of the transmission seat is hinged to the seat plate, the other end of the transmission seat is rotationally connected with the first support body, the seat plate drives the transmission seat to rotate when being lifted, the transmission seat drives the first support body to rotate at the moment, and when the first support body rotates, the transmission gear drives the second gear to rotate, so that the second support body is driven to rotate, the rotation direction of the second support body is opposite to the rotation direction of the first support body, and the backrest keeps translating in the horizontal direction.

2. The seat according to claim 1, wherein a first connecting seat is fixedly arranged at the rear end of the supporting seat, the lower end of the first supporting body is hinged to the first connecting seat, a first groove is formed in the first connecting seat, and the first gear is fixedly arranged in the first groove.

3. The seat according to claim 2, wherein the transmission seat is provided with a first shaft hole and a second shaft hole at intervals, a first rotating shaft is arranged in the first shaft hole, a second rotating shaft is arranged in the second shaft hole, and the transmission seat is hinged with the tail end of the seat plate through the second rotating shaft; the novel bearing support is characterized in that arc-shaped sliding grooves are symmetrically formed in the left side wall and the right side wall of the first connecting seat, the arc-shaped sliding grooves penetrate through the side wall of the first connecting seat, two shaft seat plates with opposite intervals extend downwards from the lower end of the first supporting body, the first connecting seat is located between the two shaft seat plates, the shaft seat plates are connected with the first connecting seat in a rotating mode through supporting shafts, the first rotating shaft penetrates through the arc-shaped sliding grooves and then is inserted into preset insertion holes in a shaft seat plate of the first supporting body, and when the seat plate drives the transmission seat to move, the transmission seat pulls the shaft seat plate through the first rotating shaft, so that the shaft seat plate and the first supporting body rotate around the supporting shafts.

4. The seat according to claim 1, wherein a second connecting seat is provided at an upper end of the first support body, the second connecting seat includes a second groove, and the second gear is rotatably connected in the second groove.

5. A seat as claimed in claim 1, wherein the lower end of the front side of the first housing is provided with a notch, said notch being adapted to the transmission seat.

6. The seat of claim 1, wherein the first gear, the second gear, and the drive gear are incomplete gears, the teeth of the first gear are disposed upwardly, and the teeth of the second gear are disposed downwardly.

7. The seat according to claim 1, wherein the middle part of the transmission gear is provided with a mounting hole, a third rotating shaft matched with the mounting hole is arranged in the first shell along the left-right direction, two sides of the third rotating shaft are respectively provided with a shaft cushion block, the shaft cushion blocks are integrally formed at two sides of the first shell, two ends of the third rotating shaft are pressed into grooves preset on the shaft cushion blocks, and then a sealing cover is locked on the shaft cushion blocks to prevent the third rotating shaft from being separated from the shaft cushion blocks, so that the transmission gear is positioned between the two shaft cushion blocks.

8. The seat according to claim 1, wherein a connecting rod bracket is arranged between the supporting seat and the seat plate, the connecting rod bracket comprises two parallel and obliquely arranged supporting frames, the two supporting frames are arranged at intervals along the front-rear direction, the lower end of the supporting frame is hinged with the chassis supporting seat, and the upper end of the supporting frame is hinged with the bottom surface of the seat plate; the supporting seat, the two supporting frames and the seat plate form a four-bar mechanism.

9. The seat according to claim 8, wherein a gas spring is further arranged in the supporting seat, one end of the gas spring is hinged to the supporting seat, the other end of the gas spring is hinged to the seat plate or the supporting frame, when the gas spring is in an open state, the seat plate is pressed down under the action of external force to enable the seat plate to be linked with the backrest mechanism, and the gas spring contracts and generates damping elastic force; when the external force disappears, the seat board rises and resets under the damping elastic force of the gas spring; when the gas spring is in a closed state, the seat plate and the backrest mechanism are locked and stay in the current state.

10. A seat as set forth in claim 1 wherein said second support body includes a second housing having a second cavity, said backrest including a support bar, a portion of said support bar being located within said second cavity.