Stay wire control spring adjusting device for seat
By designing a pull-wire control spring adjustment device, the combination of the adjustment drive mechanism and the grease chamber is adjusted, solving the problem of the non-adjustable spring assembly in existing seat adjustment devices. This achieves adaptability to the needs of different users and adjustment convenience, improving the comfort and stability of the seat.
Patent Information
- Application Number
- CN202511624043.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-01-20
AI Technical Summary
In existing seat adjustment devices, the elastic force of the spring assembly is not adjustable, which makes it impossible for users of different ages and physical conditions to obtain a comfortable or controllable adjustment experience. Those with weaker physical strength have difficulty adjusting the backrest angle, while those with stronger physical strength are prone to the backrest tilting too quickly.
Design a pull-wire controlled spring adjustment device. By adjusting the drive mechanism to drive the adjustment shaft to rotate, the preload state of the adjustable spring assembly is changed, and the elastic force of the spring assembly on the rocker is adjusted to meet the needs of different users. The device also solves the problem of adjustment difficulties caused by long-term use through a grease chamber and a moving control mechanism.
It enables adjustment of the seat back rotation resistance according to user needs, adapting to different physical conditions, improving the convenience and stability of adjustment, and avoiding the jamming and adjustment difficulties caused by prolonged use of the spring assembly.
Smart Images
Figure CN121361393A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of seats, in particular to a pull wire control spring adjusting device for a seat. BACKGROUND
[0002] The existing lifting seat usually comprises an adjusting device, a backrest, a gas cylinder, a seat, a chassis and the like, wherein the adjusting device is arranged at the lower end of the seat and can adjust the angle of the backrest.
[0003] The existing seat adjusting device usually comprises a base and a rocker plate, the rocker plate is rotatably connected with the base, the backrest of the seat is connected with the rocker plate, and a spring assembly is arranged between the backrest and the rocker plate; when adjusting the angle of the backrest, the locking mechanism on the adjusting device is first loosened to loosen the rocker plate, so that the rocker plate can rotate relative to the base, then the backrest is adjusted to the required angle by means of the back force of the user, and finally the rocker plate is locked by the locking mechanism to fix the backrest at the current angle state.
[0004] In the existing seat adjusting device, the elastic force of the spring assembly on the rocker plate is usually not adjustable, and there are significant differences in age, gender and physical strength among users of the lifting seat, which results in that part of the population cannot obtain comfortable or controllable adjusting experience. For example, if the elastic force of the spring assembly is designed to be too strong, it may be difficult for the people with weak physical strength 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 backrest; if the elastic force of 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 people with strong physical strength, which is likely to cause the user to lose stability, and the fast tilting speed of the backrest cannot make the backrest accurately stay at the required angle, which brings certain inconvenience to the actual use. SUMMARY
[0005] The present application aims to solve the problems in the prior art and provide a pull wire control spring adjusting device for a seat.
[0006] The purpose of the present application is realized by the following technical scheme: a pull wire control spring adjusting device for a seat, comprising a base, a rocker connected to the base, a main spring assembly, a first adjustable spring assembly, and a second adjustable spring assembly, both ends of the main spring assembly are connected to the rocker and the base, one end of the first adjustable spring assembly and the second adjustable spring assembly are connected to the rocker; an adjusting shaft is rotatably connected to the base, the adjusting shaft is provided with a first rotary adjusting part corresponding to the first adjustable spring assembly and a second rotary adjusting part corresponding to the second adjustable spring assembly; the first rotary adjusting part is provided with a first compression boss, and the second rotary adjusting part is provided with a second compression boss; the adjusting shaft is connected to an adjusting driving mechanism, and the adjusting shaft is driven to rotate by the adjusting driving mechanism to change the pre-pressing state of the first adjustable spring assembly and the second adjustable spring assembly.
[0007] As a preferred, the base is provided with a guide, the guide is provided with a guide groove corresponding to the first adjustable spring assembly and the second adjustable spring assembly; the first adjustable spring assembly is provided with a sliding body at one end close to the first rotary adjusting part, and the second adjustable spring assembly is provided with a sliding body at one end close to the second rotary adjusting part; the sliding body is connected in the guide groove.
[0008] As a preferred, the adjusting driving mechanism comprises an adjusting hand wheel seat, an adjusting hand wheel, a pull wire fixing seat, and a pull wire adjusting wheel, the adjusting hand wheel is rotatably connected to the adjusting hand wheel seat, and the pull wire adjusting wheel is connected to the rotating shaft; the adjusting hand wheel and the pull wire adjusting wheel are provided with a first pull wire and a second pull wire; the adjusting hand wheel drives the pull wire adjusting wheel to rotate when the adjusting hand wheel rotates.
[0009] As a preferred, the first pull wire and the second pull wire are both composed of an outer sleeve and an inner pull wire; both ends of the inner pull wire of the first pull wire are connected to the adjusting hand wheel and the pull wire adjusting wheel, and both ends of the outer sleeve of the first pull wire are connected to the adjusting hand wheel seat and the pull wire fixing seat; both ends of the inner pull wire of the second pull wire are connected to the adjusting hand wheel and the pull wire adjusting wheel, and both ends of the outer sleeve of the second pull wire are connected to the adjusting hand wheel seat and the pull wire fixing seat.
[0010] As a preferred, the first rotary adjusting part is provided with two first compression bosses, and the interval angle between the two first compression bosses is 90 degrees; the second rotary adjusting part is provided with two second compression bosses, and the interval angle between the two second compression bosses is 180 degrees.
[0011] As a preferred, the first adjustable spring assembly is provided with a contact part at one end close to the first compression boss, and the second adjustable spring assembly is provided with a contact part at one end close to the second compression boss; the contact part is provided with a contact surface for contacting the first compression boss or the second compression boss.
[0012] As preferred, a guide cavity is arranged in the contact part, one end of the guide cavity is provided with a contact plate, and a contact surface is arranged on one side of the contact plate; a plurality of oil outlets are arranged on the contact plate; a piston body is arranged in the guide cavity, and a grease cavity is formed between the piston body and the contact plate; grease is filled in the grease cavity; a pressing spring is arranged on the end of the piston body away from the contact plate; and a movement control mechanism for controlling the movement of the piston body is arranged between the contact part and the piston body.
[0013] As preferred, the movement control mechanism comprises a stroke control component, a remote control wire, a mounting groove arranged on the cavity wall of the guide cavity, and a fixing shaft arranged in the mounting groove; the middle part of the stroke control component is connected to the fixing shaft and can rotate around the fixing shaft; a plurality of stop rings are arranged on the side surface of the piston body, and the stop rings are arranged equidistantly along the axial direction of the piston body; a front hook for cooperating with the stop rings is arranged on one end of the stroke control component, and a rear hook for cooperating with the stop rings is arranged on the other end of the stroke control component; a return spring is arranged between the end of the stroke control component close to the front hook and the contact part; the end of the stroke control component close to the front hook is connected to the remote control wire; a pulling force is applied to the end of the stroke control component through the remote control wire to make the stroke control component rotate around the connecting shaft; and the movement distance of the piston body is controlled by alternately hooking the stop rings on the piston body through the front hook and the rear hook.
[0014] As preferred, the remote control wire comprises a guide pipe and an inner core wire arranged in the guide pipe, and the inner core wire can move in the guide pipe; one end of the guide pipe is fixedly connected to the contact part, and the other end of the guide pipe is connected to a fixed base; one end of the inner core wire is connected to the end of the stroke control component close to the front hook; and the other end of the inner core wire passes through the fixed base and is connected to a pulling part.
[0015] The beneficial effects of the present application are as follows: in the present application, the main spring assembly provides a basic elastic force, the adjusting drive mechanism is used to drive the adjusting shaft to rotate to change the pre-pressing state of the first adjustable spring assembly and the second adjustable spring assembly, the pre-pressing state (pre-pressing length) of the adjustable spring assembly is changed, the elastic force of the first adjustable spring assembly and the second adjustable spring assembly on the bellow plate is adjusted, the overall elastic force of the spring assembly on the bellow plate is adjusted, and thus the resistance during the rotation of the seat backrest can be adjusted to adapt to the needs of users of different age groups and different physical conditions. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 FIG. 1 is a structural schematic diagram of the present application embodiment 1.
[0017] Figure 2 FIG. 3 is a structural schematic diagram of the base and the bellow plate of the present application embodiment 1.
[0018] Figure 3 FIG. 4 is a structural schematic diagram of the present application embodiment 1 after removing the base.
[0019] Figure 4 For Figure 3 Enlarged view of A in the figure.
[0020] Figure 5 Structure diagram of the embodiment 1 of the present application after removing the base.
[0021] Figure 6 Structure diagram of the adjusting driving mechanism and the adjusting executing mechanism in the embodiment 1 of the present application.
[0022] Figure 7 Exploded view of the adjusting driving mechanism and the adjusting executing mechanism in the embodiment 1 of the present application.
[0023] Figure 8 Diagram of the adjusting executing mechanism switching to three different states in the embodiment 1 of the present application.
[0024] Figure 9 Structure diagram of the first adjustable spring assembly or the second adjustable spring assembly in the embodiment 2 of the present application.
[0025] Figure 10 Sectional view of the first adjustable spring assembly or the second adjustable spring assembly in the embodiment 2 of the present application.
[0026] Figure 11 For Figure 10 Enlarged view of B in the figure.
[0027] Figure 12 Structure diagram of the piston body.
[0028] In the figure: 1, base, 2, rocker, 2-1, rotating shaft, 2-2, fixed shaft, 3, main spring assembly, 4, first adjustable spring assembly, 5, second adjustable spring assembly, 6, first rotating adjusting part, 6-1, first compression boss, 7, second rotating adjusting part, 7-1, second compression boss, 8, adjusting driving mechanism, 8-1, adjusting hand wheel seat, 8-2, pull wire fixing seat, 8-3, adjusting hand wheel, 8-4, first pull wire, 8-5, second pull wire, 8-6, pull wire adjusting wheel, 9, guide piece, 9-1, guide groove, 10, pressing piece, 11, adjusting shaft, 12, index wheel, 14, pressing spring, 15, sliding body, 16, contact part, 16-1, mounting groove, 17, contact plate, 17-1, oil outlet hole, 18, remote control wire, 18-1, inner core wire, 18-2, guide pipe, 19, fixed base, 20, pulling part, 21, piston body, 21-1, sealing ring, 21-2, stop ring, 22, grease cavity, 23, pressure spring, 24, stroke control part, 24-1, front hook, 24-2, rear hook, 25, fixed shaft, 26, return spring. DETAILED DESCRIPTION
[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.
[0030] Example 1: like Figures 1 to 8 As shown, a cable-controlled spring adjustment device for a seat includes a base 1, a rocker 2 rotatably connected to the base 1, a main spring assembly 3, a first adjustable spring assembly 4, and a second adjustable spring assembly 5. Both ends of the main spring assembly 3 are connected to the rocker 2 and the base 1, respectively. One end of both the first adjustable spring assembly 4 and the second adjustable spring assembly 5 is connected to the rocker 2. An adjustment shaft 11 is rotatably connected to the base 1. The adjustment shaft 11 is equipped with a first rotary adjustment component 6 corresponding to the first adjustable spring assembly 4 and a second rotary adjustment component 7 corresponding to the second adjustable spring assembly 5. The adjustment shaft 11 is connected to an adjustment drive mechanism 8, which drives the adjustment shaft 11 to rotate, thereby changing the preload state of the first adjustable spring assembly 4 and the second adjustable spring assembly 5.
[0031] In this invention, the main spring assembly 3 provides basic elastic force. The adjustment drive mechanism 8 drives the adjustment shaft 11 to rotate, thereby changing the pre-compression state of the first adjustable spring assembly 4 and the second adjustable spring assembly 5. By changing the pre-compression state (pre-compression length) of the adjustable spring assembly, the elastic force of the first adjustable spring assembly 4 and the second adjustable spring assembly 5 on the rocker 2 can be adjusted, thereby adjusting the overall force of the spring assembly on the rocker 2. In this way, the resistance when the seat back rotates can be adjusted, thus adapting to the needs of users of different ages and physical conditions.
[0032] For those with less physical strength, the overall elasticity of the spring assembly can be reduced to make adjusting the backrest angle easier; for those with more physical strength, the overall elasticity of the spring assembly can be reduced to avoid the problem of "suddenly tilting backward" due to insufficient resistance when adjusting the backrest.
[0033] The adjusting shaft 11, the first rotating adjusting component 6, and the second rotating adjusting component 7 together constitute the adjusting actuator. When the adjusting shaft 11 rotates, it drives the first rotating adjusting component 6 and the second rotating adjusting component 7 to rotate synchronously.
[0034] The base 1 is provided with a guide 9, and the guide 9 is provided with a guide groove 9-1 corresponding to the first adjustable spring assembly 4 and the second adjustable spring assembly 5; the first adjustable spring assembly 4 is provided with a sliding body 15 close to one end of the first rotary adjusting part 6, and the second adjustable spring assembly 5 is provided with a sliding body 15 close to one end of the second rotary adjusting part 7; the sliding body 15 is connected in the guide groove 9-1. Wherein, the first adjustable spring assembly 4 and the second adjustable spring assembly 5 are arranged in parallel, and the axial direction of the guide groove is substantially the same as the length direction of the first adjustable spring assembly 4. When the first adjustable spring assembly 4 and the second adjustable spring assembly 5 change the pre-pressing length, the sliding body 15 at the end is limited in the guide groove, so as to limit the moving direction of the adjustable spring assembly, and avoid the spring from appearing transverse deviation and skew due to uneven force.
[0035] Specifically, the adjusting driving mechanism 8 comprises an adjusting hand wheel seat 8-1, an adjusting hand wheel 8-3, a pull wire fixing seat 8-2 and a pull wire adjusting wheel 8-6; the adjusting hand wheel 8-3 is rotationally connected to the adjusting hand wheel seat 8-1, and the pull wire adjusting wheel 8-6 is connected to the rotating shaft 2-1; the adjusting hand wheel 8-3 and the pull wire adjusting wheel 8-6 are provided with a first pull wire 8-4 and a second pull wire 8-5; the adjusting hand wheel 8-3 drives the pull wire adjusting wheel 8-6 to rotate when the adjusting hand wheel 8-3 rotates. Wherein, the first pull wire 8-4 and the second pull wire 8-5 are both composed of an outer sleeve and an inner pull wire; the two ends of the inner pull wire of the first pull wire 8-4 are connected to the adjusting hand wheel 8-3 and the pull wire adjusting wheel 8-6 respectively, and the two ends of the outer sleeve of the first pull wire 8-4 are connected to the adjusting hand wheel seat 8-1 and the pull wire fixing seat 8-2 respectively; the two ends of the inner pull wire of the second pull wire 8-5 are connected to the adjusting hand wheel 8-3 and the pull wire adjusting wheel 8-6 respectively, and the two ends of the outer sleeve of the second pull wire 8-5 are connected to the adjusting hand wheel seat 8-1 and the pull wire fixing seat 8-2 respectively.
[0036] The connection positions of the inner pull wire of the first pull wire 8-4 and the adjusting hand wheel 8-3 and the connection positions of the inner pull wire of the second pull wire 8-5 and the adjusting hand wheel 8-3 are respectively located on both sides of the adjusting hand wheel 8-3; similarly, the connection positions of the inner pull wire of the first pull wire 8-4 and the pull wire adjusting wheel 8-6 and the connection positions of the inner pull wire of the second pull wire 8-5 and the pull wire adjusting wheel 8-6 are respectively located on both sides of the pull wire adjusting wheel 8-6. When the adjusting hand wheel 8-3 rotates, the inner pull wire of the first pull wire 8-4 or the second pull wire 8-5 will exert a tangential pulling force on the edge of the pull wire adjusting wheel 8-6, thereby forming a torque on the pull wire adjusting wheel 8-6, driving the pull wire adjusting wheel 8-6 to rotate, and further driving the adjusting shaft 11 to rotate. The adjusting driving mechanism 8 uses the first pull wire 8-4 and the second pull wire 8-5 as power transmission components, and the adjusting hand wheel 8-3 can be arranged at a more easily operated position on the seat through the pull wire, such as the side of the seat or under the armrest, and the arrangement position of the adjusting hand wheel 8-3 is not restricted by the transmission factor, so it is more flexible to arrange and is convenient for the user to operate.
[0037] The first rotary adjustment component 6 is provided with two first compression bosses 6-1, and the second rotary adjustment component 7 is provided with two second compression bosses 7-1. The interval angle between the two first compression bosses 6-1 on the first rotary adjustment component 6 is 90 degrees, and the interval angle between the two second compression bosses 7-1 on the second rotary adjustment component 7 is 180 degrees.
[0038] The first adjustable spring assembly 4 and the second adjustable spring assembly 5 have different stiffness values.
[0039] like Figure 8 As shown, the adjustment actuator can be switched to three different states. When switched to state 1, the first compression boss 6-1 on the first rotary adjustment component 6 rotates to a state where it is offset from the end of the first adjustable spring assembly 4. At this time, the first adjustable spring assembly 4 reaches its maximum length (the compression amount reaches its minimum), and the elastic force exerted by the first adjustable spring assembly 4 on the rocker 2 is also minimal. The second compression boss 7-1 on the second rotary adjustment component 7 rotates to a state where it directly contacts the end of the second adjustable spring assembly 5. The second compression boss 7-1 forms the maximum compression amount on the second adjustable spring assembly 5, so that the length of the second adjustable spring assembly 5 reaches its minimum. At this time, the elastic force of the second adjustable spring assembly 5 on the rocker 2 reaches its maximum.
[0040] When switching to state 2, the first compression boss 6-1 on the first rotary adjustment component 6 rotates to directly contact the end of the first adjustable spring assembly 4, thereby forming the maximum compression on the first adjustable spring assembly 4, so that the length of the first adjustable spring assembly 4 reaches its minimum. At this time, the elastic force of the first adjustable spring assembly 4 on the rocker 2 reaches its maximum. At the same time, the second compression boss 7-1 on the second rotary adjustment component 7 rotates to a state that is offset from the end of the first adjustable spring assembly 4. At this time, the second adjustable spring assembly 5 reaches its maximum length (the compression reaches its minimum), and the elastic force applied by the second adjustable spring assembly 5 on the rocker 2 is also minimum.
[0041] When switching to state 3, the first compression boss 6-1 on the first rotation adjusting component 6 rotates to directly contact the end of the first adjustable spring assembly 4, the first compression boss 6-1 forms the maximum compression amount to the first adjustable spring assembly 4, the length of the first adjustable spring assembly 4 reaches the minimum, and the elastic force of the first adjustable spring assembly 4 to the flap 2 reaches the maximum at this time; at the same time, the second compression boss 7-1 on the second rotation adjusting component 7 rotates to directly contact the end of the second adjustable spring assembly 5, the second compression boss 7-1 forms the maximum compression amount to the second adjustable spring assembly 5, the length of the second adjustable spring assembly 5 reaches the minimum, and the elastic force of the second adjustable spring assembly 5 to the flap 2 reaches the maximum at this time; in this state, the overall elastic force of the first adjustable spring assembly 4 and the second adjustable spring assembly 5 to the flap 2 reaches the maximum.
[0042] Further, the adjusting shaft 11 is provided with a indexing wheel 12, the base 1 is provided with a guide hole, the guide hole is provided with a pressing piece 10 corresponding to the indexing wheel 12, and the pressing piece 10 and the base 1 are provided with a pressing spring 14; the indexing wheel 12 is provided with a plurality of positioning recesses in the circumferential direction, which cooperate with the pressing piece 10. The positioning recesses on the circumference of the indexing wheel 12 cooperate with the pressing piece 10, when the adjusting shaft 11 is rotated to a specific angle (corresponding to a specific elastic force), the pressing piece 10 will be clamped into the positioning recess under the action of the pressing spring 14, and a "click" sound will be generated, so that the user can perceive the gear switching through the change of resistance or the "click" sound, without relying on visual judgment, and the operation is more intuitive.
[0043] The flap 2 is provided with a rotating shaft 2-1 and a fixed shaft 2-2, and the flap 2 is rotationally connected with the base 1 through the rotating shaft 2-1; the fixed shaft 2-2 is used for connecting the first adjustable spring assembly 4, the second adjustable spring assembly 5 and the main spring assembly 3.
[0044] Embodiment 2: As shown in Figures 9 to 12 In embodiment 2, the end of the first adjustable spring assembly 4 close to the first compression boss 6-1 and the end of the second adjustable spring assembly 5 close to the second compression boss 7-1 are both provided with a contact part 16, and the contact part 16 is provided with a contact surface for contacting the first compression boss 6-1 or the second compression boss 7-1.
[0045] The contact part 16 is provided with a guide cavity, one end of the guide cavity is provided with a contact plate 17, and a contact surface is arranged on one side of the contact plate 17; a plurality of oil outlet holes 17-1 are arranged on the contact plate 17; a piston body 21 is arranged in the guide cavity, and a lubricating grease cavity 22 is formed between the piston body 21 and the contact plate 17; the lubricating grease cavity 22 is filled with lubricating grease; the end of the piston body 21 away from the contact plate 17 is provided with a pressure spring; and a movement control mechanism for controlling the movement of the piston body 21 is arranged between the contact part 16 and the piston body 21.
[0046] The piston body 21 can move in the guide cavity. One end of the piston body 21 is provided with a sealing ring 21-1, and the sealing ring 21-1 is in sealing fit with the inner wall of the guide cavity. The movement control mechanism controls the single movement distance of the piston body 21. The lubricating grease is in paste form, and when not extruded by the piston body 21, the lubricating grease can be stably stored in the lubricating grease cavity 22, and the lubricating grease cannot be extruded outwards through the oil outlet holes 17-1 on the contact plate 17. When the piston body 21 moves forward under the pressure of the pressure spring, the piston body 21 extrudes the lubricating grease in the lubricating grease cavity 22, so that the lubricating grease can be extruded outwards through the oil outlet holes 17-1 on the contact plate 17 and onto the contact surface on one side of the contact plate 17. The piston body 21 moves a fixed distance forward under the control of the movement control mechanism, so that a certain amount of lubricating grease can be extruded quantitatively each time. The materials of the first compression boss 6-1, the second compression boss 7-1, the contact part 16 and the contact plate 17 are metal or alloy materials, so as to ensure sufficient strength and wear resistance.
[0047] In the scheme of the present application, the user adjusts the spring force of the first adjustable spring assembly 4 and the second adjustable spring assembly 5 at a relatively low frequency. Generally, after the user adjusts the spring force of the first adjustable spring assembly 4 and the second adjustable spring assembly to the state required by the user, the user will not frequently adjust it thereafter. Only when the user changes or the user is not satisfied with the current state of comfort, the user will adjust the spring force of the first adjustable spring assembly 4 and the second adjustable spring assembly again. This results in that the first compression boss 6-1 or the second compression boss 7-1 and the contact surface on the contact part 16 are in contact for a long time (several months or even longer). When the first compression boss 6-1 or the second compression boss 7-1 and the contact surface on the contact part 16 are in contact, a high contact pressure is maintained between them for a long time. During the long-time contact, due to the loss of lubricant, the lubrication effect between them decreases, and in addition, the metal atoms in the materials may diffuse and combine to form a state similar to "cold welding" due to the long-time stationary pressure contact between the first compression boss 6-1 or the second compression boss 7-1 and the contact plate 17. This makes the bonding force between the compression boss and the contact plate 17 increase. Thus, when the subsequent spring force adjustment is needed, additional separation resistance needs to be overcome, which may cause the adjustment shaft 11 and the compression boss to be difficult to rotate due to excessive resistance, thereby causing great difficulty in the adjustment process.
[0048] To solve the above problems, the present application is provided with a lubricating grease cavity 22 inside the contact part 16, and an oil outlet hole 17-1 is provided on the contact plate 17 to allow the lubricating grease to be extruded. The pressure spring applies an elastic pressure to the piston body 21. When the long-time pressure contact between the compression boss and the contact plate 17 causes the adjustment shaft 11 to be difficult to rotate, the piston body 21 is moved forward by a certain distance under the pushing of the pressure spring by operating the moving control mechanism. The lubricating grease in the lubricating grease cavity 22 is quantitatively extruded through the oil outlet hole 17-1 on the contact plate 17 during the movement of the piston body 21. The extruded lubricating grease is dispersed in the contact gap between the contact plate 17 and the compression boss, thereby forming a lubricating grease film between them. At the same time, when the lubricating grease is extruded and diffused along the contact gap between the contact plate 17 and the compression boss, the lubricating grease forms a certain pressure between the compression boss and the contact plate 17. The contact plate 17 and the compression boss are pushed apart by the pressure of the lubricating grease, so that the compression boss and the contact surface are separated, the "cold welding adhesion" state between them is broken, and the resistance between the compression boss and the contact plate 17 is greatly reduced, thereby allowing the adjustment shaft 11 to rotate smoothly, and avoiding the problem that the long-time pressure contact between the compression boss and the contact plate 17 causes the adjustment shaft 11 to be difficult to rotate and stuck.
[0049] The movement control mechanism limits the single movement of the piston body 21 by a fixed distance, ensures that the movement distance of the piston body 21 is fixed each time, realizes the quantitative extrusion of the lubricating grease, and thus ensures that the amount of lubricating grease is sufficient to form an effective lubricating film each time, and the lubricating grease is not wasted due to excessive extrusion. This design is suitable for use in a low-frequency adjustment scene, and the single quantitative replenishment of lubricating grease can support long-term use without frequent addition of lubricating grease.
[0050] Specifically, the movement control mechanism includes a stroke control component 24, a remote control line 18, a mounting groove 16-1 provided on the wall of the guide cavity, a fixed shaft 25 provided in the mounting groove 16-1, the middle part of the stroke control component 24 being connected to the fixed shaft 25 and being rotatable about the fixed shaft 25, a plurality of stop rings 21-2 provided on the side surface of the piston body 21 and arranged equidistantly along the axial direction of the piston body 21, a front hook 24-1 provided at one end of the stroke control component 24 and used for cooperating with the stop rings 21-2, a rear hook 24-2 provided at the other end of the stroke control component 24 and used for cooperating with the stop rings 21-2, a reset spring 26 provided between the end of the stroke control component 24 close to the front hook 24-1 and the contact part 16, and the end of the stroke control component 24 close to the front hook 24-1 being connected to the remote control line 18. A pulling force is applied to one end of the stroke control component 24 through the remote control line 18 to rotate the stroke control component 24 about the connecting shaft, and the movement distance of the piston body 21 is controlled by alternately hooking the stop rings 21-2 on the piston body 21 through the front hook 24-1 and the rear hook 24-2.
[0051] The front hook 24-1 and the rear hook 24-2 of the stroke control component 24 form a cooperation structure with the equidistant stop rings 21-2 on the piston body 21: when the remote control line 18 is pulled, the stroke control component 24 rotates about the fixed shaft 25, the front hook 24-1 is disengaged from the current stop ring 21-2, and the rear hook 24-2 hooks the stop ring 21-2 closest to it, and in this process, the piston body 21 moves forward by a certain distance; after the remote control line 18 is released, the reset spring 26 drives the stroke control component 24 to return to the original position, so that the front hook 24-1 hooks the next stop ring 21-2 again, and in this process, the piston body 21 moves forward by a certain distance; in the whole process of “disengaging and hooking the next stop ring 21-2” of the front hook 24-1, the piston body 21 moves forward by a fixed distance of the interval between the stop rings 21-2 under the pushing of the pressure spring, thereby controlling the movement distance of the piston body 21 each time, ensuring that the movement distance of the piston body 21 is strictly consistent each time, and further ensuring that the amount of lubricating grease extruded from the lubricating grease cavity 22 each time is accurately controllable.
[0052] The remote control line 18 comprises a conduit 18-2 and an inner core line 18-1 arranged in the conduit 18-2, and the inner core line 18-1 is movable in the conduit 18-2; one end of the conduit 18-2 is fixedly connected with the contact part 16, and the other end of the conduit 18-2 is connected with the fixed base 19; one end of the inner core line 18-1 is connected with one end of the stroke control part 24 close to the front claw 24-1; and the other end of the inner core line 18-1 is connected with the pulling part 20 after passing through the fixed base 19.
[0053] The remote control line 18 adopts a structure of "conduit + inner core line": the two ends of the conduit 18-2 are fixed between the contact part 16 and the fixed base 19 to provide stable guidance for the inner core line 18-1; one end of the inner core line 18-1 is connected with the stroke control part 24, and the other end of the inner core line 18-1 extends to the external pulling part 20; this design can enable the user to control the movement of the piston body 21 by only pulling the external pulling part 20, thereby breaking the limitation of the operation by the internal space of the seat and greatly facilitating the convenience of operation. Moreover, the flexibility of the arrangement of the remote control line 18 can enable the fixed base 19 and the pulling part 20 to be arranged at positions on the seat which are convenient for the user to contact. The fixed base 19 is provided with screw holes, and the fixed base 19 can be fixed on the corresponding position on the seat by means of screws.
[0054] The present application is not limited to the above-mentioned best mode of implementation, and anyone can derive other various forms of products under the inspiration of the present application, but regardless of any change in shape or structure, any technical solution with the same or similar technical solution as the present application falls within the protection scope of the present application.
Claims
1. A cable control spring adjustment device for a seat, characterized by, The utility model provides a kind of adjustable spring device, including base, swing plate rotationally connected on base, main spring assembly, first adjustable spring assembly, second adjustable spring assembly, the both ends of main spring assembly are connected with swing plate and base respectively, and the one end of first adjustable spring assembly and second adjustable spring assembly is connected with swing plate;Base is rotationally connected with adjusting shaft, adjusting shaft is provided with the first rotary adjusting part corresponding with first adjustable spring assembly and the second rotary adjusting part corresponding with second adjustable spring assembly;First rotary adjusting part is provided with first compression boss, and second rotary adjusting part is provided with second compression boss;Adjusting shaft is connected with adjusting drive mechanism, and the precompression state of first adjustable spring assembly and second adjustable spring assembly is changed by adjusting drive mechanism to drive adjusting shaft rotation.
2. A cable control spring adjustment device for a seat as defined in claim 1, wherein The base is provided with a guide, and the guide is provided with a guide groove corresponding to the first adjustable spring assembly and the second adjustable spring assembly; the one end of the first adjustable spring assembly close to the first rotary adjusting part and the one end of the second adjustable spring assembly close to the second rotary adjusting part are provided with sliding bodies; the sliding bodies are connected in the guide groove.
3. A cable control spring adjustment device for a seat as defined in claim 1, wherein The adjusting drive mechanism includes an adjusting hand wheel seat, an adjusting hand wheel, a pull wire fixing seat and a pull wire adjusting wheel; the adjusting hand wheel is rotationally connected to the adjusting hand wheel seat, and the pull wire adjusting wheel is connected to the rotating shaft; the adjusting hand wheel and the pull wire adjusting wheel are provided with a first pull wire and a second pull wire; the adjusting hand wheel drives the pull wire adjusting wheel to rotate when the adjusting hand wheel rotates.
4. A cable control spring adjustment device for a seat as defined in claim 3, wherein The first pull wire and the second pull wire are each composed of an outer sleeve and an inner pull wire; the two ends of the inner pull wire of the first pull wire are connected to the adjusting hand wheel and the pull wire adjusting wheel respectively, and the two ends of the outer sleeve of the first pull wire are connected to the adjusting hand wheel seat and the pull wire fixing seat respectively; the two ends of the inner pull wire of the second pull wire are connected to the adjusting hand wheel and the pull wire adjusting wheel respectively, and the two ends of the outer sleeve of the second pull wire are connected to the adjusting hand wheel seat and the pull wire fixing seat respectively.
5. A cable control spring adjustment device for a seat as defined in claim 1, wherein, The first rotary adjusting part is provided with two first compression bosses, and the interval angle between the two first compression bosses is 90 degrees; the second rotary adjusting part is provided with two second compression bosses, and the interval angle between the two second compression bosses is 180 degrees.
6. A cable control spring adjustment device for a seat as defined in claim 1, wherein, The one end of the first adjustable spring assembly close to the first compression boss and the one end of the second adjustable spring assembly close to the second compression boss are each provided with a contact part, and the contact part is provided with a contact surface for contacting the first compression boss or the second compression boss.
7. A cable control spring adjustment device for a seat as defined in claim 6, wherein The contact part is provided with a guide cavity, one end of the guide cavity is provided with a contact plate, and the contact surface is arranged on one side of the contact plate; the contact plate is provided with a plurality of oil outlet holes; the guide cavity is provided with a piston body, and a grease cavity is formed between the piston body and the contact plate; the grease cavity contains grease; the one end of the piston body away from the contact plate is provided with a pressure spring; and a movement control mechanism for controlling the movement of the piston body is arranged between the contact part and the piston body.
8. A cable control spring adjustment device for a seat as defined in claim 7, wherein, The movement control mechanism comprises a stroke control component, a remote control wire, a mounting groove provided on the wall of the guide cavity, a fixing shaft provided in the mounting groove, the middle part of the stroke control component being connected to the fixing shaft and being rotatable around the fixing shaft, a plurality of blocking rings provided on the side surface of the piston body and arranged equidistantly along the axial direction of the piston body, a front hook provided at one end of the stroke control component and used for cooperating with the blocking rings, a rear hook provided at the other end of the stroke control component and used for cooperating with the blocking rings, a reset spring provided between the end of the stroke control component close to the front hook and the contact part, the end of the stroke control component close to the front hook being connected to the remote control wire, the one end of the stroke control component being pulled by the remote control wire to rotate the stroke control component around the connecting shaft, and the movement distance of the piston body being controlled by alternately hooking the blocking rings on the piston body by the front hook and the rear hook.
9. A cable control spring adjustment device for a seat as defined in claim 8, wherein, The remote control wire comprises a guide pipe and an inner core wire provided in the guide pipe, the inner core wire being movable in the guide pipe, one end of the guide pipe being fixedly connected to the contact part, the other end of the guide pipe being connected to the fixed base, one end of the inner core wire being connected to the end of the stroke control component close to the front hook, and the other end of the inner core wire being connected to the pulling part after passing through the fixed base.