Seat adjusting device and using method thereof

Abstract

The invention provides a seat adjusting device and a using method thereof, the seat adjusting device comprises a base, a bottom plate and a seesaw, the base is rotatably connected with the bottom plate, and the seesaw is rotatably connected with the base; a second shaft body is arranged on the warping plate, a force application lever is arranged on the second shaft body, and a spring assembly is arranged between one end of the force application lever and the base; a guide supporting surface is arranged on the base, a supporting assembly mounting space is formed between the guide supporting surface and the force application lever, and a supporting assembly is arranged in the supporting assembly mounting space; a spring force adjusting mechanism is arranged on the base; the base is further provided with an angle locking mechanism and a lifting adjusting mechanism, wherein the angle locking mechanism is used for locking the angle of the warping plate. According to the invention, the spring force adjusting mechanism can adjust the position of the supporting assembly in the supporting assembly mounting space, so that the position of the rotating fulcrum of the force application lever is changed; when the position of the rotating fulcrum is changed, the elastic acting force and the torque of the spring assembly acting on the warping plate can be adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seat, in particular to a seat adjusting device and a method for using the same. BACKGROUND

[0002] The existing lifting seat usually comprises adjusting device, backrest, air cylinder, seat, chassis and the like, wherein the bottom of the air cylinder is connected with the chassis, the top of the air cylinder is connected with the adjusting device, and the backrest and the seat are also connected with the adjusting device. The adjusting device plays a role in controlling the air cylinder and adjusting the height of the seat, and also plays a role in adjusting the angle of the backrest.

[0003] Among them, the existing seat adjusting device usually comprises base, rocker plate, bottom plate, the rocker plate is rotatably connected with the base, the backrest is connected with the rocker plate, and the back plate is provided with a spring assembly between the rocker plate; in addition, the base is also provided with a locking mechanism, which is used for locking the angle of the rocker plate. When adjusting the angle of the back plate, the rocker plate is first loosened by the locking mechanism so that the rocker plate can rotate relative to the base, then the backrest is adjusted to the required angle by the back of the user, and finally the rocker plate is locked by the locking mechanism to fix the back plate at the current angle state.

[0004] When adjusting the angle of the back plate, the user needs to overcome the elastic resistance of the spring assembly. In the existing adjusting device, the elastic force of the spring assembly on the rocker plate is not adjustable when the backrest is adjusted in angle, and there are significant differences in age, gender and physical strength among the users of the lifting seat, which makes some groups unable to obtain comfortable or controllable adjustment experience. For example, if the spring assembly is designed to be too strong, it may be difficult for the weak to overcome the resistance of the spring assembly to adjust the angle of the backrest, and there will be great difficulty in adjusting the angle of the back plate; if the spring assembly is designed to be too weak, the backrest will be "suddenly tilted" due to the small resistance when the backrest is adjusted by the strong groups (such as young people), which is easy to cause the user to lose stability, and the fast dumping speed of the backrest cannot make the backrest accurately stay at the required angle, which often needs to be adjusted several times to reach the ideal angle state, causing certain inconvenience to the user. SUMMARY

[0005] The purpose of the present application is to solve the problems in the prior art and provide a seat adjusting device and a method for using the same.

[0006] The application aims at realizing the technical scheme of a seat adjusting device, which comprises a base, a bottom plate and a rocker plate, the base is rotatably connected with the bottom plate, and the rocker plate is rotatably connected with the base; a second shaft body is arranged on the rocker plate, a force lever is arranged on the second shaft body, and a spring assembly is arranged between one end of the force lever and the base; a guide support surface is arranged on the base, a support assembly installation space is formed between the guide support surface and the force lever, and a support assembly is arranged in the support assembly installation space; a spring force adjusting mechanism is arranged on the base, the position of the support assembly in the support assembly installation space is adjusted through the spring force adjusting mechanism; the force lever rotates with the support assembly as a rotating fulcrum; an angle locking mechanism for locking the angle of the rocker plate and a lifting adjusting mechanism are further arranged on the base.

[0007] Preferably, the support assembly comprises a first support block, a second support block and a round shaft body arranged between the first support block and the second support block, one side of the first support block is in contact with the guide support surface, and one side of the second support block is in contact with the force lever; the first support block and the second support block are both provided with a circular arc surface matched with the round shaft body, and the round shaft body is in contact with the circular arc surfaces on the first support block and the second support block at the same time.

[0008] Preferably, one side of the first support block close to the guide support surface is provided with a protruding part, and the guide support surface is provided with a recessed area corresponding to the protruding part, and the protruding part on the first support block is embedded in the recessed area on the guide support surface.

[0009] Preferably, the spring force adjusting mechanism comprises a fourth shaft body and a spring force adjusting handle, the spring force adjusting handle and the fourth shaft body are rotatably connected with the base, the fourth shaft body is provided with a second adjusting gear and an arc-shaped slot plate, the arc-shaped slot plate is provided with an arc-shaped slot and a shaft hole for connecting the fourth shaft body; the distance between the arc-shaped slot and the center of the shaft hole gradually increases from the starting end to the terminal section of the arc-shaped slot; the end of the round shaft body is connected in the arc-shaped slot; a plurality of round shaft body clamping positions are arranged in the arc-shaped slot in sequence; the fourth shaft body is provided with a second adjusting gear, and the spring force adjusting handle is provided with a first adjusting gear, and the first adjusting gear is engaged with the second adjusting gear.

[0010] Preferably, the angle locking mechanism comprises a locking adjusting handle and a lock block, the locking adjusting handle is rotatably connected with the base, the locking adjusting handle is provided with a gear adjusting part, and the gear adjusting part is provided with a third pull rod arm; the base is provided with a lock block guide slot, the lock block is slidably connected in the lock block guide slot, a lock block pressing plate is arranged above the lock block guide slot, the lock block pressing plate is provided with a torsional spring, one end of the torsional spring is connected with the third pull rod arm through a locking control pull rod, and the other end of the torsional spring is connected with the lock block; a plurality of locking slots corresponding to the lock block are arranged on the rocker plate.

[0011] As preferred, the base is provided with a lifting adjusting mechanism, the lifting adjusting mechanism comprises a lifting adjusting handle and a cylinder control piece, the lifting adjusting handle and the cylinder control piece are both rotationally connected on the base, the cylinder control piece is provided with a pressing part and a second pull rod arm, the first pull rod arm and the second pull rod arm are connected through a lifting control pull rod; the cylinder control piece is provided with the pressing part, and the pressing part is located above the cylinder mounting hole on the base.

[0012] As preferred, the base is provided with a constraint groove, and the constraint groove is provided with a starting limiting surface and a terminal limiting surface at two ends respectively; the second shaft body is located in the constraint groove.

[0013] As preferred, the base is provided with a first shaft body, and the flap is provided with a limiting hole, the first shaft body passes through the limiting hole.

[0014] As preferred, the first support block and the second support block are both provided with an anti-adhesion mechanism, the anti-adhesion mechanism comprises a sliding block guide groove, a steel ball hole, a sliding block, a steel ball and a brake wire, the sliding block guide groove and the steel ball hole are both provided on the first support block and the second support block, the steel ball hole on the first support block is located on one side of the sliding block guide groove close to the guide support surface, and the steel ball hole on the second support block is located on one side of the sliding block guide groove close to the force lever; the steel ball is arranged in the steel ball hole, and the sliding block is arranged in the sliding block guide hole; the sliding block is provided with a pressing inclined surface, and the pressing inclined surface is in contact with one side of the steel ball; the brake wire comprises an outer sleeve and an inner steel wire arranged in the outer sleeve, one end of the inner steel wire is connected with the sliding block, and one end of the outer sleeve is connected with the outer side surface of the first support block or the second support block; the brake wire is connected with a brake wire driving device, the brake wire driving device comprises a threaded cylinder and a threaded body, the threaded cylinder is provided with an internal thread, and the threaded body is threadedly connected in the threaded cylinder; the other end of the inner steel wire is connected with the threaded body of the brake wire driving device, and the other end of the outer sleeve is connected with the outer surface of the threaded cylinder; a return spring is arranged between the sliding block and one end of the sliding block guide groove.

[0015] A method for using the seat adjusting device, and the specific method is as follows: When the angle of the seat backrest is adjusted, the locking of the flap is released through the angle locking mechanism, the seat backrest is adjusted to a target angle by the user, and then the angle locking mechanism is used to lock the angle of the flap; when the spring force of the seat backrest is adjusted, the spring force adjusting handle is rotated, the fourth shaft body is driven to rotate by the spring force adjusting handle, the arc-shaped groove plate is driven to rotate by the fourth shaft body, the end of the circular shaft body moves in the arc-shaped groove when the arc-shaped groove plate rotates, and the support assembly moves up and down in the support assembly mounting space under the action of the arc-shaped groove plate, so that the rotation fulcrum position of the force lever is adjusted; after the adjustment is completed, the spring force adjusting handle is stopped.

[0016] The beneficial effects of the present application are: in the present application, the spring force adjusting mechanism can adjust the position of the support assembly in the support assembly installation space, thereby changing the rotating fulcrum position of the force applying lever (i.e. adjusting the length ratio of the force arms on both sides of the force applying lever); when the position of the rotating fulcrum changes, the length ratio of the force arms on both sides of the force applying lever also changes, so that the elastic force and torque of the spring assembly acting on the rocker plate can be adjusted; in this way, the elastic force of the spring assembly on the rocker plate can be adjusted according to the user's needs; for users with weak physical strength, the spring force can be adjusted to a smaller state, so that they can easily overcome the spring resistance to push the backrest for angle adjustment; and for users with strong physical strength, the spring force can be adjusted to a larger state to avoid the problem of "sudden backward tilting" of the backrest due to insufficient resistance, so that users of different ages, genders and physical strengths can all have a comfortable and controllable adjustment experience. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of embodiment 1 of the present application.

[0018] Figure 2 It is a structural schematic diagram of one direction of embodiment 1 of the present application after removing the bottom plate.

[0019] Figure 3 It is an exploded view of embodiment 1 of the present application.

[0020] Figure 4 It is a structural schematic diagram of the base.

[0021] Figure 5 It is a structural schematic diagram of the base and the locking adjusting mechanism.

[0022] Figure 6 It is a structural schematic diagram of another direction of embodiment 1 of the present application after removing the bottom plate.

[0023] Figure 7 It is a structural schematic diagram of the spring force adjusting mechanism when installed on the base.

[0024] Figure 8 It is a structural schematic diagram of the spring force adjusting mechanism.

[0025] Figure 9 It is a structural schematic diagram of the arc-shaped groove plate.

[0026] Figure 10 It is a structural schematic diagram of the support assembly.

[0027] Figure 11 It is a sectional view of embodiment 1 of the present application.

[0028] Figure 12 It is a schematic diagram of the adjustment process when the support assembly of embodiment 1 of the present application is located at different positions.

[0029] Figure 13 A sectional view of embodiment 2 of the present application.

[0030] Figure 14 A sectional view of embodiment 2 of the present application. Figure 13 An enlarged view of section A.

[0031] Figure 15 A sectional view of embodiment 2 of the present application. Figure 13 An enlarged view of section B.

[0032] In the figure: 1, base, 1-1, constraint groove, 1-1a, starting limit surface, 1-1b, ending limit surface, 1-2, lock block guide groove, 1-3, guide support surface, 1-4, air cylinder mounting hole, 2, bottom plate, 3, rocker plate, 3-1, limit hole, 3-2, locking groove, 4, lifting adjustment handle, 4-1, first pull rod arm, 4-2, operation part, 5, spring force adjustment handle, 6, locking adjustment handle, 8, lifting control pull rod, 9, air cylinder control piece, 9-1, second pull rod arm, 9-2, pressure applying part, 10, first shaft body, 11, second shaft body, 12, force applying lever, 13, spring seat connecting shaft, 14, first spring fixing seat, 15, spring assembly, 16, second spring fixing seat, 17, first articulating piece, 18, first adjustment gear, 19, second adjustment gear, 20, arc-shaped groove plate, 20-1, shaft hole, 20-2, arc-shaped groove, 21, second articulating piece, 22, third shaft body, 24, gear adjustment piece, 25, locking control pull rod, 26, lock block, 27, lock block pressing plate, 27-1, torsional spring through slot, 28, torsional spring, 29, torsional spring fixing screw, 31, support assembly, 31-1, first support block, 31-2, second support block, 31-3, round shaft body, 32, fourth shaft body, 33, brake wire, 33-1, inner steel wire, 33-2, outer sleeve, 34, sliding block guide groove, 35, steel ball hole, 36, sliding block, 36-1, top pressure inclined surface, 37, steel ball, 38, return spring, 39, threaded cylinder, 40, threaded body, 41, rotating handle, 42, rotating joint. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0034] Embodiment 1: As Figures 1 to 12As shown, a seat adjusting device comprises a base 1, a bottom plate 2, a rocker plate 3, the base 1 is rotatably connected with the bottom plate 2, and the rocker plate 3 is rotatably connected with the base 1; a second shaft body 11 is arranged on the rocker plate 3, a force lever 12 is arranged on the second shaft body 11, and a spring assembly 15 is arranged between one end of the force lever 12 and the base 1; a guide support surface 1-3 is arranged on the base 1, a support assembly 31 installation space is formed between the guide support surface 1-3 and the force lever 12, and the support assembly 31 is arranged in the support assembly 31 installation space; a spring force degree adjusting mechanism is arranged on the base 1, and the position of the support assembly 31 in the support assembly 31 installation space is adjusted through the spring force degree adjusting mechanism; the force lever 12 rotates with the support assembly 31 as a rotating fulcrum; and an angle locking mechanism for locking the angle of the rocker plate 3 and a lifting adjusting mechanism are further arranged on the base 1.

[0035] The rocker plate 3 is connected with a backrest of the seat. One end of the force lever 12 is connected with the second shaft body 11, and the other end is connected with the spring assembly 15. The spring assembly 15 applies an elastic force to one end of the force lever 12, and the elastic force can act on the rocker plate 3 through the force lever 12, so as to form a torque on the rocker plate 3 to automatically rotate the rocker plate 3 upward. If the user needs to adjust the angle of the backrest downward, the torque needs to be overcome to drive the backrest to rotate downward. When the angle of the backrest is adjusted, the backrest drives the rocker plate 3 to rotate, and the rocker plate 3 drives the force lever 12 to rotate. The force lever 12 rotates with the support assembly 31 as a rotating fulcrum. In the present application, the spring force degree adjusting mechanism can adjust the position of the support assembly 31 in the support assembly 31 installation space, so as to change the position of the rotating fulcrum of the force lever 12 (that is, adjust the length proportion of the force arms on both sides of the force lever 12); when the position of the rotating fulcrum changes, the length proportion of the force arms on both sides of the force lever 12 also changes, so as to adjust the elastic force and the torque of the spring assembly 15 acting on the rocker plate 3. In this way, the elastic force of the spring assembly 15 on the rocker plate 3 can be adjusted according to the needs of the user. For users with weak physical strength, the spring force degree can be adjusted to a smaller state, so that the user can easily overcome the spring resistance to push the backrest to adjust the angle; and for users with strong physical strength, the spring force degree can be adjusted to a larger state, so as to avoid the problem that the backrest “suddenly tilts” due to too small resistance, so that users of different ages, genders and physical strengths can all obtain comfortable and controllable adjusting experience.

[0036] The two ends of the spring assembly 15 are respectively provided with a first spring fixing seat 14 and a second spring fixing seat 16, the first spring fixing seat 14 is rotatably connected with the force lever 12, and the second spring fixing seat 16 is rotatably connected with the base 1.

[0037] The first hinge 17 is arranged between the base 1 and the flap 3, and the flap 3 can rotate relative to the base 1 around the first hinge 17.

[0038] As shown in the figure, the support assembly 31 comprises a first support block 31-1, a second support block 31-2, and a circular shaft body 31-3 arranged between the first support block 31-1 and the second support block 31-2. Figure 10 The first support block 31-1 and the second support block 31-2 are arranged to rotate around the circular shaft body 31-3 as the rotating center. The circular arc surface of the first support block 31-1 and the second support block 31-2 is in close contact with the circular shaft body 31-3. When the force lever 12 rotates with the flap 3, the relative rotation between the first support block 31-1 and the second support block 31-2 is formed through the circular shaft body 31-3. The existence of the circular shaft body 31-3 greatly reduces the rotation resistance, avoids the "sticking feeling" during adjustment, and is more friendly to users with weak physical strength.

[0039] The first support block 31-1 is arranged with a protruding part on the side close to the guide support surface 1-3, and the guide support surface 1-3 is arranged with a corresponding recessed area. The protruding part on the first support block 31-1 is embedded in the recessed area on the guide support surface 1-3. The recessed area is arranged along the vertical direction, and the movement direction of the support assembly 31 is limited through the cooperation between the protruding part and the recessed area.

[0040] The spring force adjusting mechanism comprises a fourth shaft body 32 and a spring force adjusting handle 5, both of which are in rotational cooperation with the base 1. The fourth shaft body 32 is provided with a second adjusting gear 19 and an arc-shaped slot plate 20. The arc-shaped slot plate 20 is provided with an arc-shaped slot 20-2 and a shaft hole 20-1 for connecting the fourth shaft body 32. The distance between the arc-shaped slot 20-2 and the center of the shaft hole 20-1 gradually increases from the starting end to the terminal end of the arc-shaped slot 20-2. The end of a circular shaft body 31-3 is connected in the arc-shaped slot 20-2. A plurality of circular shaft body clamping positions are sequentially arranged in the arc-shaped slot 20-2. The fourth shaft body 32 is provided with the second adjusting gear 19, and the spring force adjusting handle 5 is provided with a first adjusting gear 18. The first adjusting gear 18 is in meshing cooperation with the second adjusting gear 19. The two ends of the fourth shaft body 32 are rotationally connected with the base 1. The cross section of the fourth shaft body 32 is a regular hexagon.

[0041] When the user rotates the spring force adjusting handle 5, the first adjusting gear 18 on the spring force adjusting handle 5 will rotate synchronously. Since the first adjusting gear 18 is in meshing cooperation with the second adjusting gear 19 on the fourth shaft body 32, the power is transmitted to the fourth shaft body 32 through gear transmission, driving the fourth shaft body 32 and the arc-shaped slot plate 20 fixed thereon to rotate together. The arc-shaped slot 20-2 on the arc-shaped slot plate 20 cooperates with the end of the circular shaft body 31-3, and the distance between the arc-shaped slot 20-2 and the center of the shaft hole 20-1 gradually increases from the starting end to the terminal end. When the arc-shaped slot plate 20 rotates with the fourth shaft body 32, the arc-shaped slot 20-2 generates a pushing force or a pulling force on the circular shaft body 31-3 through the slot wall, forcing the circular shaft body 31-3 to move along the guide support surface 1-3 of the base 1 (the circular shaft body 31-3 is constrained by the support assembly 31 and cannot rotate circumferentially but can only translate along a straight line or a specific track), thereby adjusting the position of the support assembly 31 and further adjusting the position of the rotating fulcrum of the force applying lever 12.

[0042] The plurality of circular shaft body clamping positions arranged in the arc-shaped slot 20-2 can limit the circular shaft body 31-3 when it moves to the corresponding position. When the user stops rotating the adjusting handle, the circular shaft body clamping position can prevent the circular shaft body 31-3 from moving by itself under the reaction force of the spring assembly 15, ensuring the stability of the position of the support assembly 31 and maintaining the setting state of the spring force. Moreover, when the circular shaft body 31-3 enters the circular shaft body clamping position, a slight "stuck feeling" is generated, which is matched with the change of the rotating resistance of the handle to provide clear gear shifting feedback for the user, facilitating the perception of the current spring force state and reducing the misoperation.

[0043] The angle locking mechanism comprises a locking adjusting handle 6, a locking block 26, the locking adjusting handle 6 is rotationally connected with the base 1, the locking adjusting handle 6 is provided with a gear adjusting part 24, the gear adjusting part 24 is provided with a third pull rod arm, the base 1 is provided with a locking block guide groove 1-2, the locking block 26 is slidingly connected in the locking block guide groove 1-2, the locking block guide groove 1-2 is provided with a locking block pressing plate 27 above, the locking block pressing plate 27 is provided with a torsion spring 28, one end of the torsion spring 28 is connected with the third pull rod arm through a locking control pull rod 25, the other end of the torsion spring 28 is connected with the locking block 26, the hinged plate 3 is provided with a plurality of locking grooves 3-2 corresponding to the locking block 26.

[0044] When the user rotates the locking adjusting handle 6 in one direction, the gear adjusting part 24 on the handle rotates synchronously, the third pull rod arm on the gear adjusting part 24 swings, the third pull rod arm pulls one end of the torsion spring through the locking control pull rod 25, the torsion spring deforms and twists, since the other end of the torsion spring is connected with the locking block 26, and the locking block 26 is limited in the locking block guide groove 1-2 (only can slide along the groove), the rotation of the torsion spring drives the locking block 26 to move along the guide groove away from the hinged plate 3, finally the locking block 26 is separated from the locking grooves 3-2 on the hinged plate 3, at this time the hinged plate 3 is unlocked, the hinged plate 3 can rotate with the backrest for angle adjustment, conversely when the user releases the locking adjusting handle 6 or rotates the locking adjusting handle 6 in the other direction, the pulling force of the third pull rod arm on the locking control pull rod 25 disappears, the torsion spring resets under the action of its own elastic restoring force, pushes the locking block 26 to move along the guide groove towards the hinged plate 3, when the hinged plate 3 rotates to the target angle, the locking block 26 is clamped into the locking groove 3-2 in the corresponding position under the action of the pushing force of the torsion spring, through the mechanical engagement of the locking block 26 and the locking groove 3-2, the hinged plate 3 is limited to continue to rotate, the angle of the backrest is fixed.

[0045] The lifting adjusting mechanism comprises a lifting adjusting handle 4 and a cylinder control part 9, the lifting adjusting handle 4 and the cylinder control part 9 are both rotationally connected on the base 1, the cylinder control part 9 is provided with a pressing part 9-2 and a second pull rod arm 9-1, a first pull rod arm 4-1 and the second pull rod arm 9-1 are connected through a lifting control pull rod 8, the cylinder control part 9 is provided with the pressing part 9-2, the pressing part 9-2 is above a cylinder mounting hole 1-4 on the base 1.

[0046] When the user rotates the lifting adjustment handle 4, the lifting adjustment handle 4 drives the first pull rod arm 4-1 connected thereto to rotate. The first pull rod arm 4-1 is connected to the second pull rod arm 9-1 on the cylinder control piece 9 through the lifting control pull rod 8, so the rotation of the first pull rod arm 4-1 is transmitted to the second pull rod arm 9-1 through the lifting control pull rod 8, thereby driving the cylinder control piece 9 to rotate; the cylinder control piece 9 is provided with a pressing part 9-2, which rotates when the cylinder control piece 9 rotates; the upper end of the cylinder part of the seat enters and exits the cylinder mounting hole 1-4 on the base 1, and the upper end of the cylinder part is provided with a lifting control rod for triggering the lifting of the cylinder; the rotation of the pressing part 9-2 triggers the lifting control rod at the top of the cylinder part, thereby controlling the lifting of the cylinder and realizing the height adjustment function of the entire seat.

[0047] The lifting adjustment handle 4 is in a circular tube structure, and the lifting adjustment handle 4 is sleeved outside the spring force adjustment handle 5. The lifting adjustment handle 4 is provided with an operation part 4-2, which facilitates the rotation of the lifting adjustment handle 4.

[0048] The base 1 is provided with a constraint groove 1-1, and the constraint groove 1-1 is provided with a starting limiting surface 1-1a and a terminating limiting surface 1-1b at both ends respectively; the second shaft body 11 is located in the constraint groove 1-1.

[0049] The base plate 2 is provided with a first shaft body 10, and the lifting plate 3 is provided with a limiting hole 3-1, and the first shaft body 10 passes through the limiting hole 3-1. The limiting hole 3-1 is in a waist hole structure, and the first shaft body 10 has a certain movement space in the waist hole.

[0050] A method for using a seat adjustment device is provided, and the specific method is as follows: When adjusting the angle of the seat back, the angle locking mechanism is first used to unlock the lifting plate 3, and then the user adjusts the seat back to the target angle and locks the lifting plate 3 through the angle locking mechanism; when adjusting the spring force of the seat back, the spring force adjustment handle 5 is rotated, the fourth shaft body 32 is driven to rotate by the spring force adjustment handle 5, the arc-shaped groove plate 20 is driven to rotate by the fourth shaft body 32, the end of the circular shaft body 31-3 moves in the arc-shaped groove 20-2 when the arc-shaped groove plate 20 rotates, and the support assembly 31 moves up and down in the support assembly 31 installation space under the action of the arc-shaped groove plate 20, thereby adjusting the rotation fulcrum position of the force lever 12; after the adjustment is completed, the spring force adjustment handle 5 is stopped.

[0051] Embodiment 2: As Figures 13 to 15As shown, the difference between Example 2 and Example 1 is that in Example 2, the first support block 31-1 and the second support block 31-2 are both provided with an anti-blocking mechanism, which includes a sliding block guide groove 34, a steel ball hole 35, a sliding block 36, a steel ball 37, and a brake cable 33. The sliding block guide groove 34 and the steel ball hole 35 are both provided on the first support block 31-1 and the second support block 31-2. The steel ball hole 35 on the first support block 31-1 is located on the side of the sliding block guide groove 34 close to the guide support surface 1-3, and the steel ball hole 35 on the second support block 31-2 is located on the side of the sliding block guide groove 34 close to the force applying lever 12. The steel ball 37 is arranged in the steel ball hole 35, and the sliding block 36 is arranged in the sliding block guide groove 36. The sliding block 36 is provided with a pressing inclined surface 36-1, which is in contact with one side of the steel ball 37. The brake cable 33 includes an outer sleeve tube 33-2 and an inner steel wire 33-1 arranged in the outer sleeve tube 33-2. One end of the inner steel wire 33-1 is connected to the sliding block 36, and one end of the outer sleeve tube 33-2 is in contact with the outer side of the first support block 31-1 or the second support block 31-2. The brake cable 33 is connected to a brake cable 33 driving device, which includes a threaded cylinder 39 and a threaded body 40. The threaded cylinder 39 is provided with an internal thread, and the threaded body 40 is threadedly connected in the threaded cylinder 39. The other end of the inner steel wire 33-1 is connected to the threaded body 40 of the brake cable 33 driving device, and the other end of the outer sleeve tube 33-2 is in contact with the outer surface of the threaded cylinder 39. A return spring 38 is arranged between the sliding block 36 and one end of the sliding block guide groove 34.

[0052] A rotating handle 41 is arranged on the threaded body 40. The inner steel wire 33-1 is connected to the threaded body 40 through a rotating joint, which allows the threaded body 40 and the steel wire to rotate relative to each other, thereby avoiding the threaded body 40 rotating together with the inner steel wire 33-1.

[0053] In a normal use scenario, the user will not frequently adjust the position of the support assembly 31 through the spring stiffness adjustment mechanism, which results in that the support assembly 31 may not be adjusted for a long time after the last adjustment (for example, after the user is replaced, the new user may adjust the spring stiffness again), and the first support block 31-1 and the second support block 31-2 are in contact with the guide support surface 1-3 and the surface of the force lever 12 for a long time under a certain pressure. The contact surface between the first support block 31-1 and the guide support surface 1-3 is prone to adhesion, and the contact surface between the second support block 31-2 and the force lever 12 is also prone to adhesion. In the case of no lubrication or lubrication failure, the micro-contact metal surfaces will gradually fuse due to "metallic bond adsorption". At room temperature, if the oxide layer of the metal surface is damaged due to extrusion, the fresh metal surface will directly contact, which will produce a bonding force similar to welding (i.e. "cold welding"). Since the support block and the contact surface do not move for a long time, this bonding force will gradually accumulate, and eventually the contact surface will be "adhered". In addition, dust and fibers (such as fibers falling off the seat fabric) in the environment will enter the contact surface and mix with the residual grease to form "oil sludge". The oil sludge not only loses the lubricating effect, but also acts as an "adhesive" to stick the contact surface together. Especially under pressure, the oil sludge will be compacted, further enhancing the adhesion effect. Once the adhesion occurs, it will cause the problem that the support assembly 31 is difficult to move.

[0054] To solve the problem that the contact surface adhesion causes the support assembly 31 to be difficult to move, the present application can effectively solve this problem by providing an anti-adhesion mechanism on the first support block 31-1 and the second support block 31-2.

[0055] In normal use state (i.e. without adjusting the position of the support assembly 31), the steel ball 37 is completely located in the steel ball hole 35, and the steel ball 37 does not protrude from the steel ball hole 35 because the sliding block 36 does not exert an active thrust force. When the contact surface of the first support block 31-1 and the second support block 31-2 is stuck, causing the support assembly 31 to be difficult to adjust, the user rotates the threaded body 40 in one direction, and the rotation is converted into linear motion by the threaded cooperation between the threaded cylinder 39 and the threaded body 40, so that the threaded body 40 moves along the axial direction of the threaded cylinder 39. Since the end of the inner steel wire 33-1 away from the sliding block 36 is connected to the threaded body 40, and the other end of the outer sleeve 33-2 is connected to the outer surface of the threaded cylinder 39 (the outer sleeve 33-2 is fixed and only the inner steel wire 33-1 is movable), the axial movement of the threaded body 40 will generate a pulling force on the inner steel wire 33-1, and the pulling force will be transmitted to the sliding block 36 through the inner steel wire 33-1. The pulling force of the inner steel wire 33-1 overcomes the elastic force of the return spring 38, and drives the sliding block 36 to move along the sliding block guide groove 34. When the sliding block 36 moves, the thrusting inclined surface 36-1 on the sliding block 36 contacts one side of the steel ball 37, and as the sliding block 36 moves, the thrusting inclined surface 36-1 will generate a component force on the steel ball 37 towards the force lever 12 direction or the guide support surface 1-3 direction, which will make the steel ball 37 move towards the force lever 12 direction or the guide support surface 1-3 direction, so that the steel ball 37 protrudes outwardly from the steel ball hole 35. After the steel ball 37 protrudes from the steel ball hole 35, the steel ball 37 will contact the guide support surface 1-3 (first support block side) or the surface of the force lever 12 (second support block side) and exert a thrust force perpendicular to the contact surface. This thrust force will separate the first support block 31-1 and the guide support surface 1-3 or the second support block 31-2 and the force lever 12, so that a certain gap is generated between the first support block 31-1 and the guide support surface 1-3 or between the second support block 31-2 and the force lever 12. By using the steel ball 37 to "pry open" the first support block 31-1 from the guide support surface 1-3 and the second support block 31-2 from the surface of the force lever 12, the contact surface of the first support block 31-1 and the second support block 31-2 is completely separated, and the sticking problem of the contact surface is completely eliminated, so that the support assembly 31 can restore the low-resistance state of sliding. After the sticking problem is eliminated, the user reversely rotates the threaded body 40 to reset the sliding block 36, and the steel ball 37 retracts into the steel ball hole 35. After the sticking problem is eliminated, the position of the support assembly 31 can be normally adjusted through the spring force adjustment mechanism.

[0056] The rest of the structure of example 2 is the same as example 1.

[0057] The present application is not limited to the above best mode, anyone under the inspiration of the present application can derive other various forms of products, but regardless of any changes in its shape or structure, as long as it has the same or similar technical solutions as this application, it falls within the scope of the present application.

Claims

1. A seat adjustment device, characterized by, The base, the bottom plate and the hinged plate are rotatably connected; the second shaft body is arranged on the hinged plate, the force lever is arranged on the second shaft body, and the spring assembly is arranged between one end of the force lever and the base; the guiding support surface is arranged on the base, the support assembly installation space is formed between the guiding support surface and the force lever, and the support assembly is arranged in the support assembly installation space; the spring force degree adjusting mechanism is arranged on the base, the position of the support assembly in the support assembly installation space is adjusted through the spring force degree adjusting mechanism, and the force lever rotates with the support assembly as a rotating fulcrum; The angle locking mechanism and the lifting adjusting mechanism for locking the angle of the hinged plate are further arranged on the base.

2. A seat adjustment device according to claim 1, wherein The support assembly comprises a first support block, a second support block and a round shaft body arranged between the first support block and the second support block, one side of the first support block is in contact with the guiding support surface, and one side of the second support block is in contact with the force lever; the first support block and the second support block are both provided with a circular arc surface matched with the round shaft body, and the round shaft body is in contact with the circular arc surfaces on the first support block and the second support block at the same time.

3. A seat adjustment device according to claim 2, wherein The side of the first support block close to the guiding support surface is provided with a protruding part, and the guiding support surface is provided with a recessed area corresponding to the protruding part, and the protruding part on the first support block is embedded in the recessed area on the guiding support surface.

4. A seat adjustment device according to claim 2, wherein The spring force degree adjusting mechanism comprises a fourth shaft body and a spring force degree adjusting handle, the spring force degree adjusting handle and the fourth shaft body are rotatably connected with the base, the second adjusting gear and the arc-shaped groove plate are arranged on the fourth shaft body, the arc-shaped groove and the shaft hole for connecting the fourth shaft body are arranged on the arc-shaped groove plate, the distance between the arc-shaped groove and the center of the shaft hole gradually increases from the starting end of the arc-shaped groove to the terminal section, the end of the round shaft body is connected in the arc-shaped groove, a plurality of round shaft body clamping positions are sequentially arranged in the arc-shaped groove, the second adjusting gear is arranged on the fourth shaft body, the first adjusting gear is arranged on the spring force degree adjusting handle, and the first adjusting gear is engaged with the second adjusting gear.

5. A seat adjustment device according to claim 1, wherein The angle locking mechanism comprises a locking adjusting handle and a lock block, the locking adjusting handle is rotatably connected with the base, the locking adjusting handle is provided with a gear adjusting part, and the gear adjusting part is provided with a third pull rod arm; the base is provided with a lock block guiding groove, the lock block is slidably connected in the lock block guiding groove, the upper portion of the lock block guiding groove is provided with a lock block pressing plate, the lock block pressing plate is provided with a torsion spring, one end of the torsion spring is connected with the third pull rod arm through a locking control pull rod, and the other end of the torsion spring is connected with the lock block; the hinged plate is provided with a plurality of locking grooves corresponding to the lock block.

6. A seat adjustment device according to claim 1, wherein The base is provided with a lifting adjusting mechanism, the lifting adjusting mechanism comprises a lifting adjusting handle and a cylinder control part, the lifting adjusting handle and the cylinder control part are rotatably connected on the base, the cylinder control part is provided with a pressure applying part and a second pull rod arm, the first pull rod arm and the second pull rod arm are connected through a lifting control pull rod; the cylinder control part is provided with the pressure applying part, and the pressure applying part is located above the cylinder mounting hole on the base.

7. A seat adjustment device according to claim 1, wherein The base is provided with a constraint groove, and the constraint groove is provided with a starting limiting surface and a terminal limiting surface at two ends; the second shaft body is located in the constraint groove.

8. A seat adjustment device according to claim 1, wherein The first shaft body is arranged on the bottom plate, and the limiting hole is arranged on the flip plate.

9. A seat adjustment device according to claim 2, wherein The first support block and the second support block are provided with an anti-adhesion mechanism, which comprises a sliding block guide groove, a steel ball hole, a sliding block, a steel ball and a brake wire. The sliding block guide groove and the steel ball hole are arranged on the first support block and the second support block. The steel ball hole on the first support block is located on one side of the sliding block guide groove close to the guide support surface, and the steel ball hole on the second support block is located on one side of the sliding block guide groove close to the force lever. The steel ball is arranged in the steel ball hole, and the sliding block is arranged in the sliding block guide hole. The sliding block is provided with a pressing inclined surface, which is in contact with one side of the steel ball. The brake wire comprises an outer sleeve and an inner steel wire arranged in the outer sleeve. One end of the inner steel wire is connected with the sliding block, and one end of the outer sleeve is connected with the outer side surface of the first support block or the second support block. The brake wire is connected with a brake wire driving device. The brake wire driving device comprises a threaded cylinder and a threaded body. The threaded cylinder is provided with an internal thread, and the threaded body is threadedly connected in the threaded cylinder. The other end of the inner steel wire is connected with the threaded body of the brake wire driving device, and the other end of the outer sleeve is connected with the outer surface of the threaded cylinder. The sliding block and one end of the sliding block guide groove are provided with a return spring.

10. A method of using a seat adjustment device according to claim 4, characterized in that The specific method is as follows: When adjusting the angle of the seat back, the angle locking mechanism is first unlocked to unlock the flip plate. After the user adjusts the seat back to the target angle, the angle locking mechanism is used to lock the flip plate. When adjusting the spring force of the seat back, the spring force adjusting handle is rotated. The fourth shaft body is driven to rotate by the spring force adjusting handle, and the arc-shaped groove plate is driven to rotate by the fourth shaft body. When the arc-shaped groove plate rotates, the end of the circular shaft body will move in the arc-shaped groove. Under the action of the arc-shaped groove plate, the support assembly moves up and down in the support assembly mounting space, so as to adjust the rotating fulcrum position of the force lever. After the adjustment is completed, the spring force adjusting handle is stopped.

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