A two-way speed control device and an adjustable sofa chair

Abstract

This application relates to a bidirectional speed control device and an adjustable sofa chair, comprising a rotating sleeve, an outer frame, and a main rod. The rotating sleeve is threadedly connected to the outer frame, and the main rod passes through the outer frame and is threadedly connected to it. The threads of the rotating sleeve and the main rod have opposite directions of rotation. When the rotating sleeve rotates, it can drive the main rod to rotate. The main rod is fitted with a damping element that can generate external damping through clamping. The two ends of the damping element are respectively provided with a first elastic component and a second elastic component. The rotating sleeve can push the first elastic component to move towards the damping element, and the main rod can push the second elastic component to move towards the damping element. This application has the effect of bidirectional speed control with single-unit operation, significantly reducing unidirectional thrust or even reducing unidirectional thrust to zero, and making it easier to control the speed change.

Description

Technical Field

[0001] This application relates to the field of speed control devices, and more particularly to a bidirectional speed control device and an adjustable sofa chair. Background Technology

[0002] As people's quality of life improves, furniture products such as beds, tables, chairs, and sofas have evolved to have functional structures that allow for various posture changes.

[0003] Taking chairs as an example, many modern chairs feature adjustable backrests, headrests, armrests, and even seats. They typically also have corresponding sliding tracks to ensure smooth movement within a set range. To reduce safety hazards—for example, excessively fast sliding of the seat and backrest could be dangerous—and for greater comfort during adjustments, these chairs are usually equipped with speed control devices to maintain the sliding speed within a suitable range.

[0004] Such speed control devices generally include a screw and a handle. The screw is threaded to one of the stationary or sliding parts of the chair frame. The end of the screw is equipped with a damping end that presses against the other unconnected part of the chair frame, thus providing damping through contact.

[0005] While the above methods can achieve speed regulation, they are ultimately damping deceleration achieved through unilateral hard compression. Not only is the value of damping deceleration difficult to control, but under long-term unilateral compression, the slide rail and sliding components are prone to twisting or loosening. Summary of the Invention

[0006] In order to reduce the unidirectional pressure on the speed-adjustable component, this application provides a bidirectional speed-adjusting device and an adjustable sofa chair.

[0007] The technical solution adopted in this application for a bidirectional speed control device and an adjustable sofa chair is as follows:

[0008] In a first aspect, this application provides a bidirectional speed regulating device, which adopts the following technical solution:

[0009] A bidirectional speed regulating device includes a rotating sleeve, an outer frame, and a main rod. The rotating sleeve is threadedly connected to the outer frame, and the main rod passes through the outer frame and is threadedly connected to it. The threads of the rotating sleeve and the main rod have opposite directions. When the rotating sleeve rotates, it can drive the main rod to rotate. The main rod is fitted with a damping element that can generate external damping by clamping. The two ends of the damping element are respectively provided with a first elastic component and a second elastic component. The rotating sleeve can push the first elastic component to move toward the damping element, and the main rod can push the second elastic component to move toward the damping element.

[0010] By adopting the above technical solution, taking a chair as an example, the outer frame can be connected to either the stationary or movable part of the chair frame, with the damping component clamping the other part. When the rotating sleeve is rotated, it will push or pull the first elastic component through its threaded connection with the outer frame. Taking pushing as an example, the first elastic component will further apply pressure to one end of the damping component. Correspondingly, the main rod will be driven to rotate by the sleeve. Since the threads of the main rod and the sleeve are opposite, the main rod will retract relative to the outer frame. This will cause the main rod to pull back the second elastic component, thus causing the second elastic component to press against the damping component from the other end. In summary, rotating the sleeve can apply force to both ends of the damping component, allowing the damping component to clamp the speed-adjustable part, and achieving the effect of damping speed adjustment by changing the clamping force. Therefore, compared to the traditional unidirectional compression damping structure, this solution generates extremely low unilateral pressure. And under the following conditions: the sleeve rotates synchronously with the main rod, the extrusion deformation is within the elastic deformation range of the first elastic component and the second elastic component, and the thread advance speed of the sleeve is the same as the thread retraction speed of the main rod; this unilateral pressure will become zero.

[0011] Furthermore, due to the presence of the first and second elastic components, the damping deceleration value is easier to adjust to a suitable level compared to traditional rigid contact.

[0012] Optionally, the external frame is provided with a top rod, one end of which abuts against the rotating sleeve and can be pushed by the rotating sleeve to slide along the length direction of the main rod, and the other end of the top rod abuts against the first elastic component.

[0013] By adopting the above technical solution, the external frame restricts the sliding direction of the top rod, preventing it from rotating with the rotating sleeve and allowing it to slide only by being pushed by the rotating sleeve. The presence of the top rod also allows the rotating sleeve and damping component to be distributed on both sides of the external frame. Thus, when the external frame is installed on the chair frame, the damping component can be located on the inner side of the frame, while the rotating sleeve can be located on the outer side of the chair frame, facilitating manual operation by the user.

[0014] Optionally, the first elastic component includes a gasket and a first elastic element. The first elastic element is sleeved on the main rod, and its two ends abut against the gasket and the damping element, respectively. The top rod abuts against the end face of the gasket.

[0015] By adopting the above technical solution, the gasket can transform the single-point force of the push rod into a uniform force applied to the end of the first elastic member along the circumferential direction. In this way, the force applied by the first elastic member to the damping member will also be more uniform.

[0016] Optionally, the second elastic component includes a blocking member and a second elastic member. The blocking member is connected to the main rod and moves together with the main rod. The two ends of the second elastic member abut against the damping member and the blocking member, respectively.

[0017] By adopting the above technical solution, the elastic element can be pulled back by the main rod while being fitted onto the main rod, and the pull-back force can be applied to the damping element.

[0018] Optionally, the blocking element is threadedly connected to the main rod.

[0019] By adopting the above technical solution, on the one hand, it is convenient to install the various components fitted on the main rod; on the other hand, by rotating the blocking component, the preload of the second elastic component on the damping component can be adjusted, thereby adjusting the ratio of the pushing and pulling forces at both ends of the damping component.

[0020] Optionally, the end of the main rod has an anti-rotation end, and the sleeve is provided with an anti-rotation groove that cooperates with the anti-rotation end to prevent rotation. The anti-rotation end can slide within the anti-rotation groove along the axial direction of the main rod.

[0021] By adopting the above technical solution, the cooperation between the anti-rotation end and the anti-rotation groove enables the sleeve to drive the main rod to rotate together, and the anti-rotation groove can also provide relative displacement space between the main rod and the sleeve, and ensure that the sleeve can drive the main rod to rotate during the relative displacement process.

[0022] Optionally, the sleeve may also include a handle, the handle having a groove, the sleeve engaging with the groove, and a locking screw passing through the handle at the location of the groove, the locking screw passing through the side wall of the sleeve and threadedly connected to the sleeve.

[0023] By adopting the above technical solution, the combination of the groove and the locking screw allows the handle and the rotating sleeve to be combined with each other and prevent each other from rotating. The handle can enhance the user's operating experience and make speed adjustment more convenient.

[0024] Optionally, the groove is provided with a plurality of locking protrusions, and the side wall of the sleeve is provided with a plurality of notches that cooperate with the locking protrusions to prevent rotation.

[0025] By adopting the above technical solution, the anti-rotation effect between the handle and the sleeve is increased, and a greater anti-rotation force can be provided relative to the locking screw. During operation, a greater torque can be applied to the handle to achieve greater speed regulation damping.

[0026] Secondly, this application provides an adjustable sofa chair, which adopts the following technical solution:

[0027] An adjustable sofa chair includes a speed adjustment device, a base frame, a seat frame, and a backrest frame. The backrest is connected to the base frame by a pivot, and the backrest frame can rotate around the base frame with the pivot as the rotation center. The seat frame is hinged to the backrest frame, and a track block is fixed to the bottom of the seat frame. The track block is provided with a slide rail. An external frame is fixed to the base frame, and a main rod passes through the slide rail. The track block is limited by the main rod and the slide rail to move and rotate relative to the main rod. A damping element is clamped on both sides of the track block.

[0028] By adopting the above technical solution, when the upper end of the backrest frame is bent, the backrest frame flips backward around the rotation axis, and the bottom of the backrest frame flips forward; correspondingly, the seat frame moves forward along the slide and flips, and the sofa chair changes from a sitting position to a reclining position; during this process, the main rod acts as a limiting structure for the track block, causing the seat frame to move along a defined track; at the same time, the damping components on both sides of the track block dampen and decelerate the track block, avoiding safety hazards caused by the seat frame and backrest frame flipping due to excessive rotation speed.

[0029] Optionally, the base frame includes a base frame and two handrail frames, which are located on both sides of the seat frame. Each handrail frame is matched with a speed regulating device, and the two speed regulating devices are symmetrically arranged. The screw threads of the two speed regulating devices are in opposite directions, and the screws are located on the side of the handrail frame away from the seat frame.

[0030] By adopting the above technical solution, the force on both sides of the seat frame is made consistent, and whether it is to increase the damping to achieve deceleration or decrease the damping to achieve acceleration, the sleeve can be rotated in the same direction, which is convenient to operate and provides a good user experience.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. Rotating the sleeve allows force to be applied to both ends of the damping component, enabling it to clamp the speed-regulated part. The damping speed regulation effect is achieved by changing the clamping force. Thus, compared to traditional unidirectional compression damping structures, this solution generates extremely low unilateral pressure. Furthermore, under the following conditions: the sleeve rotates synchronously with the main rod; the compression deformation is within the elastic deformation range of the first and second elastic components; and the sleeve thread advance speed is the same as the main rod thread retraction speed; this unilateral pressure will become zero.

[0033] 2. Due to the presence of the first and second elastic components, the damping deceleration value is easier to adjust to a suitable value compared to traditional rigid contact;

[0034] 3. It ensures that the force on both sides of the seat is consistent, and whether the damping is increased to achieve deceleration or decreased to achieve acceleration, the sleeve can be rotated in the same direction, making it easy to operate and providing a good user experience. Attached Figure Description

[0035] Figure 1 This is an overall structural diagram of the bidirectional speed regulation device in Embodiment 1.

[0036] Figure 2 This is an exploded view of the bidirectional speed regulating device of Example 1.

[0037] Figure 3 This is a structural diagram of the main rod and the screw sleeve in Example 1.

[0038] Figure 4 This is a structural diagram of the handle and the screw sleeve of Embodiment 1.

[0039] Figure 5 This is a schematic diagram of the main rod and the anti-rotation structure of the screw sleeve in Embodiment 2.

[0040] Figure 6 This is a schematic diagram showing the positions of the main rod and the anti-rotation structure of the rotating sleeve in Embodiment 3.

[0041] Figure 7 This is an internal structural diagram of the main rod and the anti-rotation structure of the screw sleeve in Example 3.

[0042] Figure 8 This is an overall structural diagram of the adjustable sofa chair in Example 4.

[0043] Figure 9 It is Example 4 Figure 8 Enlarged view at point A.

[0044] Explanation of reference numerals in the attached drawings: 1. Sleeve; 11. Anti-rotation groove; 111. Main groove; 112. Slot; 12. Notch; 13. Inner groove; 14. Third elastic element; 15. Connecting sleeve; 16. Protrusion; 17. Groove; 2. Outer frame; 21. Base; 22. Outer plate; 23. Ear; 24. Top rod; 3. Main rod; 31. Anti-rotation end; 311. Head; 312. Protrusion; 32. Smooth rod; 33. Screw 4. Damper; 41. Damper plate; 5. First elastic component; 51. Washer; 52. First elastic component; 6. Second elastic component; 61. Second elastic component; 62. Block; 7. Handle; 71. Groove; 72. Snap-fit; 73. Locking screw; 8. Base frame; 81. Base frame; 82. Armrest frame; 9. Seat frame; 91. Track block; 911. Slide rail; 10. Backrest frame; 101. Rotary shaft. Detailed Implementation

[0045] The present application will be further described in detail below with reference to the accompanying drawings.

[0046] This application discloses a bidirectional speed control device and an adjustable sofa chair.

[0047] Example 1:

[0048] For ease of explanation, this embodiment of the bidirectional speed control device is used as an example of an application to a sofa chair. However, the sofa chair should not be considered as a limitation on the application scope of the bidirectional speed control device of this application. The bidirectional speed control device of this application can be applied to any type of furniture such as a bed, table, chair, or sofa, and can also be applied to occasions other than furniture where speed control is required. The sofa chair includes a stationary module and a sliding module.

[0049] Reference Figure 1 and Figure 2A bidirectional speed regulating device includes a rotating sleeve 1, an outer frame 2, a main rod 3, and a damping element 4. The outer frame 2 is fixed to one of a stationary module and a sliding module. The damping element 4 clamps the other of the two modules to dampen and decelerate the relative displacement between the stationary module and the sliding module. The rotating sleeve 1 and the main rod 3 are mounted on the outer frame 2 and work together to regulate the abutting force at both ends of the damping element 4 to adjust the clamping damping magnitude of the damping element 4.

[0050] The outer frame 2 includes an integrally formed base 21 and an outer plate 22, the outer plate 22 being used for external connection. The base 21 is columnar and has two protruding ears 23 on its periphery, the ears 23 penetrating the outer plate 22. Each ear 23 is fitted with a push rod 24, the push rod 24 being slidable along the axial direction of the base 21.

[0051] The outer circumferential surface of one end of the base 21 is threaded, and the sleeve 1 is fitted onto the base 21 and threadedly connected to this part. The push rod 24 abuts against the end of the sleeve 1. When the sleeve 1 rotates and is pushed forward by the thread, it will push the push rod 24.

[0052] Reference Figure 2 and Figure 3 A hole is provided through the center of the base 21 along its axis, through which the main rod 3 passes and is threadedly connected. The thread of the main rod 3 is opposite in direction to the thread of the sleeve 1. The length of the main rod 3 is sufficient to penetrate the base 21 and pass through the sleeve 1. In addition to the groove for the base 21 to be inserted, the sleeve 1 also has an anti-rotation groove 11. The end of the main rod 3 has a flat anti-rotation end 31, which can be inserted into the anti-rotation groove 11 and cooperate with the anti-rotation groove 11 to prevent rotation. The anti-rotation groove 11 has sufficient length so that the main rod 3 can always maintain anti-rotation engagement when it slides relative to the sleeve 1 along the axial direction.

[0053] Thus, when the sleeve 1 is screwed in and brought close to the outer plate 22, the main rod 3 will be driven synchronously and move in the opposite direction to the forward direction of the sleeve 1.

[0054] Reference Figure 1 and Figure 2 The main rod 3, with the outer frame 2 as the boundary, is divided into a large section of unthreaded smooth rod 32 and a small section of threaded rod 33. Along the direction from near the outer frame 2 to away from the outer frame 2, the main rod 3 is fitted with a gasket 51, a first elastic element 52, a damping element 4, a second elastic element 61, and a blocking element 62 in sequence on the smooth rod 32.

[0055] The first elastic component 5 is composed of a gasket 51 and a first elastic element 52. The end of the push rod 24 passes through the outer frame 2 and abuts against one end face of the gasket 51. The first elastic element 52 abuts against the other end face of the gasket 51, and the other end of the first elastic element 52 abuts against the end of the damping element 4 near the outer frame 2. When the push rod 24 is pushed toward the damping element 4, the first elastic element 52 is compressed, and the pressure of the push rod 24 is applied to the end of the damping element 4 near the outer frame 2 through the gasket 51 and the first elastic element 52.

[0056] The second elastic element 61 and the blocking element 62 constitute the second elastic component 6. The blocking element 62 is threadedly connected to the threaded rod 33 of the main rod 3. The two ends of the second elastic element 61 abut against the end of the damping element 4 away from the outer frame 2 and the end face of the blocking element 62 near the outer frame 2, respectively. When the push rod 24 is pushed forward, the main rod 3 also moves backward in the opposite direction. The second elastic element 61 will be compressed, and the pressure of the main rod 3 will act on the end of the damping element 4 away from the outer frame 2 through the blocking element 62 and the second elastic element 61, thereby forming the clamping force of the damping element 4.

[0057] In this embodiment, the first elastic element 52 and the second elastic element 61 are springs, but in other embodiments they can also be disc springs.

[0058] Furthermore, in other embodiments, the first elastic component 5 and the second elastic component 6 may also be an integral elastic structure, such as an elastic telescoping device or a spring cylinder. Any structure capable of being fitted onto the main rod 3 and providing axial elastic force should be considered within the scope of the first elastic component 5 and the second elastic component 6 of this application.

[0059] In this embodiment, the damping element 4 includes two damping plates 41. These two damping plates 41 are sleeved on the main rod 3, and the deceleration module to be damped is located between the two damping plates 41. The main rod 3 also passes through the deceleration module to be damped. In other embodiments, the damping element 4 can also be a single clamp or clip. Any structure capable of withstanding pressure at both ends and providing compression damping in the middle should be considered within the scope of the damping element 4 in this application.

[0060] Reference Figure 2 and 4 To improve ease of operation, the end of the sleeve 1 furthest from the outer frame 2 is also equipped with a handle 7. The handle 7 has a groove 71, and two locking protrusions 72 are integrally formed within the groove 71. The sleeve 1 is engaged with the groove 71, and the side wall of the sleeve 1 has two notches 12 that cooperate with the locking protrusions 72 to prevent rotation. A locking screw 73 is inserted through the handle 7 at the location of the groove 71. The locking screw 73 passes through the side wall of the sleeve 1 and is threadedly connected to the sleeve 1.

[0061] The implementation principle of Example 1 is as follows:

[0062] Reference Figure 1 and Figure 2 For ease of explanation, the direction in which the rotating sleeve 1 moves toward the outer frame 2 after rotation is defined as to the right, and the corresponding rotation direction is defined as positive.

[0063] When increased damping is needed to achieve deceleration:

[0064] Rotate handle 7 to make sleeve 1 rotate in the forward direction. Sleeve 1 moves to the right relative to outer frame 2 and pushes push rod 24. Push rod 24 pushes pad 51 to the right and compresses first elastic element 52. First elastic element 52 applies a rightward force to damping plate 41.

[0065] Synchronously, the main rod 3 rotates in the opposite direction and moves to the left relative to the outer frame 2. The blocking member 62 moves to the left in sync and compresses the second elastic member 61. The second elastic member 61 applies a leftward force to the damping plate 41. This causes the two damping plates 41 to press against the outer component to be decelerated.

[0066] When you need to reduce damping to achieve acceleration, simply rotate handle 7 in the opposite direction.

[0067] When there is a difference in the force applied to the left and right sides of the damping element 4: After rotating the sleeve 1 in the opposite direction, adjust the positions of the first elastic element 52 and the second elastic element 61 so that the first elastic element 52 does not contact the damping element 4. Then rotate the sleeve 1 in the forward direction so that the first elastic element 52 just contacts the damping element 4. Afterward, rotate the blocking element 62 in the forward or reverse direction so that the second elastic element 61 also just contacts the damping element 4.

[0068] Example 2:

[0069] Reference Figure 5 The difference between this embodiment and Embodiment 1 is that the anti-rotation end 31 includes a cylindrical head 311 and a protrusion 312 protruding from the peripheral sidewall of the head 311. The anti-rotation groove 11 includes a main groove 111 and a retaining groove 112 formed in the inner wall. When the head 311 is inserted into the main groove 111, the protrusion 312 is also inserted into the retaining groove 112. The width of the retaining groove 112 along the circumference of the main groove 111 is greater than the width of the protrusion 312 along the circumference of the main groove 111.

[0070] In this way, when the sleeve 1 separates from the main rod 3 due to excessive rotation, if there is an angle deviation when reconnecting due to external force, vibration or other reasons, the existence of the allowance between the slot 112 and the protrusion 312 can still allow for smooth reconnection.

[0071] In addition, based on the solution of this embodiment, it can also be designed as follows: at the beginning of the screw sleeve 1, the main rod 3 does not connect with the screw sleeve 1, so that the first elastic component 5 first applies pressure to the damping component 4 on one side. During the process of the screw sleeve 1 continuing to screw in, the screw sleeve 1 connects with the main rod 3 to stop the rotation. Then the second elastic component 6 continues to apply pressure, forming a multi-stage deceleration control, which greatly increases the deceleration control range.

[0072] Example 3:

[0073] Reference Figure 6 and Figure 7 The difference between this embodiment and the previous one is that the rotating sleeve 1 has an inner groove 13, and a mating sleeve 15 is embedded in the inner groove 13. The mating sleeve 15 can slide relative to the inner groove 13 along the axial direction of the main rod 3. A third elastic element 14 abuts between the end face of the mating sleeve 15 away from the damping element 4 and the axial end face of the inner groove 13. In this embodiment, the third elastic element 14 is a spring. The peripheral sidewall of the mating sleeve 15 has a protrusion 16 extending along the axial direction of the main rod 3, and the inner groove 13 has a recessed groove 17 that cooperates with the protrusion 16 to prevent rotation.

[0074] The rotating sleeve 1 and the mating sleeve 15 together form a through groove, which is a stop-rotation groove 11. The center line of the stop-rotation groove 11 is collinear with the axis of the inner groove 13.

[0075] Thus, when the sleeve 1 separates from the main rod 3 due to excessive rotation, if there is an angle deviation when reconnecting due to external force, vibration, or other reasons, the sleeve 15 can be squeezed and shifted, allowing the sleeve 1 to continue rotating until the anti-rotation groove 11 and the end face of the anti-rotation end 31 are exactly aligned. The third elastic element 14 then causes the sleeve 15 to connect with the anti-rotation end 31, achieving smooth connection between the anti-rotation groove 11 and the anti-rotation end 31.

[0076] In addition, based on the solution of this embodiment, it can also be designed as follows: at the beginning of the screw sleeve 1, the main rod 3 does not connect with the screw sleeve 1, so that the first elastic component 5 first applies pressure to the damping component 4 on one side. During the process of the screw sleeve 1 continuing to screw in, the screw sleeve 1 connects with the main rod 3 to stop the rotation. Then the second elastic component 6 continues to apply pressure, forming a multi-stage deceleration control, which greatly increases the deceleration control range.

[0077] Example 4:

[0078] This application also discloses an adjustable sofa chair. (See attached embodiment.) Figure 8 and Figure 9 An adjustable sofa chair includes a two-way speed adjustment device according to any one of embodiments 1-3. It also includes a base frame 8, a seat frame 9, and a backrest frame 10.

[0079] The base frame 8 includes a base frame 81 and two handrail frames 82. The handrail frames 82 are fixed to both sides of the base frame 81, and the seat frame 9 and the backrest frame 10 are located between the two handrail frames 82.

[0080] A pivot 101 connects the backrest frame 10 and the armrest frame 82. The backrest frame 10 can rotate around the base frame 8 with the pivot 101 as the center of rotation. The pivot 101 is located in the middle area where the person's back rests, and normal leaning will not cause the backrest frame 10 to rotate. The seat frame 9 is hinged to the backrest frame 10. A track block 91 is fixed to the bottom of the seat frame 9, and a slide rail 911 runs through the track block 91.

[0081] Each handrail 82 is matched with a speed regulating device. The two speed regulating devices are symmetrically arranged, and the screw sleeves 1 of the two speed regulating devices have opposite screw directions.

[0082] The external frame 2 of the speed regulating device is fixed to the handrail frame 82, wherein the external plate 22 is fixed to the handrail frame 82 by bolts, and the base 21 passes through the handrail frame 82. The handle 7 is located on the outside of the handrail frame 82. The gasket 51, the first elastic element 52, the damping plate 41, the second elastic element 61, and the blocking element 62 are located on the inside of the handrail frame 82, and the two damping plates 41 respectively abut against the two sides of the track block 91. The main rod 3 passes through the slide rail 911, and the track block 91 is limited to move and rotate relative to the main rod 3 by using the main rod 3 and the slide rail 911 as the trajectory.

[0083] The implementation principle of this application embodiment is as follows:

[0084] The pivot 101 is located in the middle area where the backrest is leaning, and normal leaning will not cause the backrest to rotate.

[0085] When the upper end of the backrest frame 10 is bent, the backrest frame 10 flips backward around the pivot 101, and the bottom of the backrest frame 10 flips forward. Correspondingly, the seat frame 9 moves forward and flips along the slide rail 911, and the sofa chair changes from a sitting position to a reclining position. During this process, the main rod 3 acts as a limiting structure for the track block 91, causing the seat frame 9 to move along the defined track. At the same time, the damping element 4 dampens and slows down the track block 91 on both sides, preventing the seat frame 9 and the backrest frame 10 from causing safety hazards due to excessive flipping speed.

[0086] When speed adjustment is required: whether to increase damping to decelerate or decrease damping to accelerate, the sleeve 1 can be rotated in the same direction.

[0087] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bidirectional speed regulating device, characterized in that: The device includes a sleeve (1), an outer frame (2), and a main rod (3). The sleeve (1) is threadedly connected to the outer frame (2). The main rod (3) passes through the outer frame (2) and is threadedly connected to it. The thread of the sleeve (1) is opposite to the thread of the main rod (3). When the sleeve (1) rotates, it can drive the main rod (3) to rotate. The main rod (3) is fitted with a damping element (4) that can generate damping externally by clamping. The damping element (4) includes two damping plates, which are fitted onto the main rod (3). The damping deceleration module to be damped is located between the two damping plates. The two ends of the damping element (4) are respectively provided with a first elastic component (5) and a second elastic component (6). The sleeve (1) can push the first elastic component (5) to move toward the damping element (4), and the main rod (3) can push the second elastic component (6) to move toward the damping element (4).

2. The bidirectional speed regulating device according to claim 1, characterized in that: The outer frame (2) is provided with a top rod (24). One end of the top rod (24) abuts against the sleeve (1) and can be pushed by the sleeve (1) to slide along the length direction of the main rod (3). The other end of the top rod (24) abuts against the first elastic component (5).

3. The bidirectional speed regulating device according to claim 2, characterized in that: The first elastic component (5) includes a gasket (51) and a first elastic element (52). The first elastic element (52) is sleeved on the main rod (3). The two ends of the first elastic element (52) abut against the gasket (51) and the damping element (4) respectively. The top rod (24) abuts against the end face of the gasket (51).

4. The bidirectional speed regulating device according to claim 1, characterized in that: The second elastic component (6) includes a blocking member (62) and a second elastic member (61). The blocking member (62) is connected to the main rod (3) and moves together with the main rod (3). The two ends of the second elastic member (61) abut against the damping member (4) and the blocking member (62) respectively.

5. A bidirectional speed regulating device according to claim 4, characterized in that: The blocking member (62) is threadedly connected to the main rod (3).

6. The bidirectional speed regulating device according to claim 1, characterized in that: The end of the main rod (3) has a non-rotation end (31), and the sleeve (1) is provided with a non-rotation groove (11) that cooperates with the non-rotation end (31) to prevent rotation. The non-rotation end (31) can slide in the non-rotation groove (11) along the axial direction of the main rod (3).

7. The bidirectional speed regulating device according to claim 1, characterized in that: It also includes a handle (7), the handle (7) is provided with a groove (71), the sleeve (1) is engaged with the groove (71), and a locking screw (73) is provided on the handle (7) at the location of the groove (71). The locking screw (73) is provided on the side wall of the sleeve (1) and is threadedly connected to the sleeve (1).

8. A bidirectional speed regulating device according to claim 7, characterized in that: The groove (71) is provided with a number of locking protrusions (72), and the side wall of the sleeve (1) is provided with a number of notches (12) that cooperate with the locking protrusions (72) to prevent rotation.

9. An adjustable sofa chair, characterized in that: The device includes any one of claims 1-8, and further includes a base frame (8), a seat frame (9), and a backrest frame (10). The backrest frame (10) is connected to the base frame (8) by a rotating shaft (101). The backrest frame (10) can rotate around the base frame (8) with the rotating shaft (101) as the rotation center. The seat frame (9) is hinged to the backrest frame (10). A track block (91) is fixed at the bottom of the seat frame (9). The track block (91) is provided with a slide rail (911). The external frame (2) is fixed to the base frame (8). The main rod (3) passes through the slide rail (911). The track block (91) is limited to move and rotate relative to the main rod (3) with the main rod (3) and the slide rail (911) as the trajectory. The damping element (4) is clamped on both sides of the track block (91).

10. An adjustable sofa chair according to claim 9, characterized in that: The base frame (8) includes a base frame (81) and two handrail frames (82). The handrail frames (82) are located on both sides of the seat frame (9). Each handrail frame (82) is matched with a speed regulating device. The two speed regulating devices are symmetrically arranged. The screw sleeves (1) of the two speed regulating devices have opposite screw directions. The screw sleeves (1) are located on the side of the handrail frame (82) away from the seat frame (9).

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