CN115804513A - Two-way speed adjusting device and adjustable sofa chair - Google Patents

Abstract

The utility model relates to a two-way speed adjusting device and adjustable sofa, it is including revolving cover, outrigger and mobile jib, revolve cover and outrigger threaded connection, the mobile jib wears to locate outrigger and with outrigger threaded connection, the screw thread of revolving the cover and the screw thread of mobile jib revolve to opposite, can drive the mobile jib when revolving the cover rotation, the mobile jib cover is equipped with the mode that can pass through the centre gripping and externally produces damped damping piece, the both ends of damping piece are equipped with first elastic component and second elastic component respectively, revolve the cover and can promote first elastic component and remove towards damping piece, the mobile jib can promote the second elastic component and remove towards damping piece. This application has the two-way speed governing of monomer operation, reduces one-way thrust by a wide margin and becomes zero even with one-way thrust, controls the effect of speed governing change volume more easily.

Description

Two-way speed adjusting device and adjustable sofa chair

Technical Field

The application relates to the field of speed adjusting devices, in particular to a bidirectional speed adjusting device and an adjustable sofa.

Background

With the improvement of the life quality of people, functional structures capable of changing various postures are derived from furniture products such as beds, tables, chairs, sofas and the like.

Taking a chair as an example, the backrest, the headrest, the armrest and even the seat plate of many chairs at present are all adjustable, and a sliding track is also arranged correspondingly so as to ensure that the whole movement is within a set range and can slide smoothly. In order to reduce the safety risk, for example, too fast sliding speed of the seat plate and the backrest may cause danger; also for the adjustment process to be more comfortable; such chairs are also generally equipped with a governor device to control the sliding speed within a suitable range.

Such devices generally comprise a threaded rod and a handle, the threaded rod being screwed to one of the stationary or sliding parts of the chair frame, the end of the threaded rod being equipped with a damping head which presses against the other part of the chair frame which is not connected, so as to obtain damping by interference.

Although the speed regulation effect can be achieved by the above mode, the damping deceleration is achieved by the one-side hard extrusion, the numerical value of the damping deceleration is not easy to control, and the slide rail and the sliding part are easy to twist or loosen under the condition of long-term one-way extrusion stress.

Disclosure of Invention

In order to weaken the one-way pressure born by the speed regulating component, the application provides a two-way speed regulating device and an adjustable sofa.

The application provides a two-way speed adjusting device and adjustable sofa chair adopts following technical scheme:

in a first aspect, the present application provides a bidirectional speed adjusting device, which adopts the following technical scheme:

the utility model provides a two-way speed adjusting device, includes cover, outrigger and mobile jib soon, cover and outrigger threaded connection soon, the mobile jib is worn to locate outrigger and with outrigger threaded connection, and the screw thread of cover and the screw thread of mobile jib soon are opposite, can drive the mobile jib when revolving the cover rotation, the mobile jib cover is equipped with the mode that can pass through the centre gripping and externally produces damped damping piece, the both ends of damping piece are equipped with first elastic component and second elastic component respectively, it can promote first elastic component towards the damping piece removal to revolve the cover, the mobile jib can promote the second elastic component towards the damping piece removal.

By adopting the technical scheme, taking a chair as an example, the external frame can be connected with one of a static part or a movable part of a chair framework, and the damping piece clamps the other part; therefore, when the rotating sleeve is rotated, the rotating sleeve is connected with the thread of the external bracket to push or retract the first elastic component, and the first elastic component further applies pressure to one end of the damping part by taking the pushing as an example; correspondingly, the main rod is driven to rotate by the rotating sleeve, and the whole main rod backs relative to the external frame due to the fact that the rotating directions of the threads of the main rod and the rotating sleeve are opposite. Like this, the mobile jib will drive second elastic component and pull back to make second elastic component compress tightly the damping piece from the other end of damping piece. In conclusion, the rotating rotary sleeve can apply acting force on both ends of the damping part, so that the damping part can clamp the speed-regulated part, and the clamping force is changed to achieve the effect of damping speed regulation. So, compare with traditional one-way extrusion damping structure, the unilateral pressure that this scheme produced is minimum. And the following conditions are satisfied: the rotary sleeve and the main rod rotate synchronously, the extrusion deformation is in the elastic deformation range of the first elastic component and the second elastic component, and the screw thread advancing speed of the rotary sleeve is the same as the screw thread retracting speed of the main rod; this one-sided pressure will become zero.

Furthermore, due to the presence of the first and second elastic components, the amount of damping deceleration will be easier to regulate to a suitable value compared to conventional hard abutments.

Optionally, the external frame is worn to be equipped with the ejector pin, ejector pin one end with revolve the cover conflict and can be revolved the cover and promote to slide along the length direction of main pole, the other end of ejector pin is contradicted in first elastic component.

By adopting the technical scheme, the external connection frame limits the sliding direction of the ejector rod, so that the ejector rod cannot rotate along with the rotary sleeve and can only be pushed by the rotary sleeve to slide, and the rotary sleeve and the damping piece can be distributed on two sides of the external connection frame due to the existence of the ejector rod; so, when external frame installation to chair skeleton, the damping piece can be located the inboard of skeleton, and revolves the cover and can be located the outside of chair skeleton, and the person of facilitating the use carries out manual operation.

Optionally, the first elastic assembly comprises a gasket and a first elastic piece, the main rod is sleeved with the first elastic piece, two ends of the first elastic piece respectively abut against the gasket and the damping piece, and the ejector rod abuts against the end face of the gasket.

Through adopting above-mentioned technical scheme, the gasket can be so that the single-point application of force of ejector pin turn into the even application of force to the tip of first elastic component along circumference, like this, first elasticity also will be more even to the application of force of damping piece.

Optionally, the second elastic component includes that to block piece and second elastic component, blocks that piece and mobile along with the removal of mobile jib and link to each other with the mobile jib, the both ends of second elastic component are contradicted respectively in damping piece and are blocked piece.

Through adopting above-mentioned technical scheme, the elastic component can be driven by the pull-back of mobile jib when the cover is in the mobile jib to the effort that will pull-back acts on damping piece.

Optionally, the blocking member is in threaded connection with the main rod.

By adopting the technical scheme, on one hand, the installation of all parts sleeved on the main rod is convenient; on the other hand, the pre-pressure of the second elastic component on the damping part can be adjusted by rotating the blocking part, so that the acting force proportion of the two ends of the damping part from pushing and pulling can be adjusted.

Optionally, the tip of mobile jib has the end of ending soon, be equipped with in the cover soon with the end cooperation of ending soon end stop the groove of ending soon, the end of ending soon can slide in the groove of ending soon along the axial of mobile jib.

Through adopting above-mentioned technical scheme, only end soon and only the cooperation in groove of revolving make to revolve the cover and can drive the mobile jib together rotatory, and only revolve the groove and can also provide the mobile jib and revolve the relative displacement space between the cover to guarantee at the relative displacement in-process, revolve the cover homoenergetic and drive the mobile jib and rotate.

Optionally, still include the handle, the handle is equipped with the caulking groove, revolve cover and caulking groove scarf joint, the handle wears to be equipped with the locking screw in the position at caulking groove place, the locking screw wear to locate the lateral wall of revolving the cover and with revolve cover threaded connection.

Through adopting above-mentioned technical scheme, the cooperation of caulking groove and locking screw makes handle and cover can the intercombination and stop soon each other soon with revolving, and the handle then can increase user's operation experience, makes the speed governing operation more convenient.

Optionally, be equipped with a plurality of card protruding in the caulking groove, the lateral wall of revolving the cover is equipped with and blocks protruding cooperation and stop a plurality of breach of revolving.

Through adopting above-mentioned technical scheme, increase the handle and revolve and overlap between the effect of ending soon, and relative lock screw can provide bigger effort of ending soon, can exert bigger moment of torsion to the handle during the operation to reach bigger damping of adjusting speed.

In a second aspect, the present application provides an adjustable sofa, which adopts the following technical solution:

an adjustable sofa chair comprises a speed adjusting device, a base frame, a seat frame and a backrest frame, wherein a rotating shaft is connected between the backrest and the base frame, the backrest frame can rotate around the base frame by taking the rotating shaft as a rotating center, the seat frame is hinged with the backrest frame, a track block is fixed at the bottom of the seat frame, and a slide way is arranged in the track block in a penetrating way; the external frame is fixed on the base frame, the main rod penetrates through the slide way, the track block is limited by the main rod and the slide way as a track and can move and rotate relative to the main rod, and the damping piece is clamped on two sides of the track block.

By adopting the technical scheme, after the upper end of the backrest frame is broken off, the backrest frame turns backwards around the rotating shaft, and the bottom of the backrest frame turns forwards; correspondingly, the seat frame moves forwards along the slide way and turns over, and the sofa is changed from a sitting posture to a lying posture; in the process, the main rod is used as a limiting structure of the track block to enable the seat frame to move along the determined track; meanwhile, the damping piece damps and decelerates the track block on two sides of the track block, so that potential safety hazards caused by the fact that the seat frame and the backrest frame are overturned at too high speed are avoided.

Optionally, the bed frame includes chassis and two handrail framves, the handrail frame is located the both sides of seat frame, and every handrail frame matches a speed adjusting device, and two speed adjusting device symmetries set up, and the cover screw thread soon of two speed adjusting device is to opposite, it is located the one side of seat frame keeping away from to revolve the cover.

Through adopting above-mentioned technical scheme, make the atress condition of seat frame both sides unanimous to no matter will increase the damping and reach the speed reduction, still reduce the damping and reach and accelerate, all can the syntropy rotatory cover of revolving, convenient operation uses and experiences well.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the rotating rotary sleeve can apply acting force on both ends of the damping part, so that the damping part can clamp the part to be regulated, and the effect of damping speed regulation can be achieved by changing the clamping force. So, compare with traditional one-way extrusion damping structure, the unilateral pressure that this scheme produced is minimum. And the following conditions are satisfied: the rotary sleeve and the main rod rotate synchronously, the extrusion deformation is in the elastic deformation range of the first elastic component and the second elastic component, and the screw thread advancing speed of the rotary sleeve is the same as the screw thread retracting speed of the main rod; this one-sided pressure will become zero;

2. due to the existence of the first elastic component and the second elastic component, compared with the traditional rigid butt joint, the damping deceleration value is easier to regulate and control to a proper value;

3. the stress conditions of the two sides of the seat frame are consistent, and the rotating rotary sleeve can rotate in the same direction no matter the damping is increased to achieve deceleration or reduced to achieve acceleration, so that the operation is convenient, and the use experience is good.

Drawings

Fig. 1 is an overall configuration diagram of a bidirectional speed control device according to embodiment 1.

Fig. 2 is an exploded view of the two-way governor of embodiment 1.

Fig. 3 is a structural view of the main pole and the swivel in embodiment 1.

Fig. 4 is a structural view of a handle and a turn sleeve of embodiment 1.

Fig. 5 is a schematic structural view of a main rod and a swivel sleeve rotation-stopping structure of embodiment 2.

Fig. 6 is a schematic position diagram of the rotation stopping structure of the main lever and the rotating sleeve of embodiment 3.

Fig. 7 is an internal structure view of the main lever and the turn-sleeve rotation-stopping structure of embodiment 3.

Fig. 8 is an overall structural view of the adjustable couch of embodiment 4.

Fig. 9 is an enlarged view at a of fig. 8 of embodiment 4.

Description of reference numerals: 1. screwing a sleeve; 11. a rotation stopping groove; 111. a main tank; 112. a card slot; 12. a notch; 13. an inner tank; 14. a third elastic member; 15. butting sleeves; 16. a convex strip; 17. a groove; 2. an external frame; 21. a base; 22. an outer connecting plate; 23. an ear portion; 24. a top rod; 3. a main rod; 31. a rotation stopping end; 311. a head portion; 312. a protrusion; 32. a polish rod; 33. a threaded rod; 4. a damping member; 41. a damping fin; 5. a first elastic member; 51. a gasket; 52. a first elastic member; 6. a second elastic member; 61. a second elastic member; 62. a blocking member; 7. a handle; 71. caulking grooves; 72. clamping convex; 73. locking screws; 8. a base frame; 81. a chassis; 82. an armrest frame; 9. a seat frame; 91. a track block; 911. a slideway; 10. a backrest frame; 101. a rotating shaft.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses a bidirectional speed regulating device and an adjustable sofa.

Example 1:

for convenience of explanation, the two-way speed adjusting device of the present embodiment is applied to a sofa, but the application range of the two-way speed adjusting device of the present invention is not limited to the sofa, and the two-way speed adjusting device of the present invention may be applied to any one of a bed, a table, a chair, a sofa, and the like, and may be applied to a place other than furniture where speed adjustment is required. The sofa comprises a stationary module and a sliding module.

Referring to fig. 1 and 2, a bidirectional speed adjusting device includes a rotating sleeve 1, an external frame 2, a main rod 3 and a damping member 4, wherein the external frame 2 is fixed to one of a stationary module and a sliding module, and the damping member 4 clamps the other of the two modules to generate damping deceleration for relative displacement between the stationary module and the sliding module. The rotary sleeve 1 and the main rod 3 are arranged on the external frame 2 and cooperate with each other to regulate and control the abutting acting force at the two ends of the damping part 4 so as to regulate and control the clamping damping of the damping part 4.

The external frame 2 includes a base body 21 and an external board 22, which are integrally formed, and the external board 22 is used for external connection. The base 21 is cylindrical, and two ear portions 23 are protruded on the peripheral side, and the ear portions 23 penetrate the outer joint plate 22. Each ear 23 is provided with a top bar 24, and the top bar 24 can slide along the axial direction of the base body 21.

The outer peripheral surface of one end of base member 21 is equipped with the screw thread, and swivel nut 1 cup joints in base member 21 and with this part threaded connection. The mandril 24 is abutted against the end part of the rotary sleeve 1, and when the rotary sleeve 1 rotates and advances along with the screw thread, the mandril 24 is pushed.

Referring to fig. 2 and 3, a hole is formed through the center of the base 21 along the axis, and the main lever 3 is inserted through the hole and threadedly coupled with the hole. The thread of the main rod 3 is opposite to the thread of the rotary sleeve 1. The main rod 3 is long enough to penetrate through the base body 21 and penetrate through the rotary sleeve 1. Besides the groove for embedding the matrix 21, the rotating sleeve 1 is also provided with a rotation stopping groove 11, the end part of the main rod 3 is provided with a flat rotation stopping end 31, and the rotation stopping end 31 can be inserted into the rotation stopping groove 11 and matched with the rotation stopping groove 11 for stopping rotation. The anti-rotation groove 11 has a sufficient length, so that the main rod 3 can always keep anti-rotation butt joint when the main rod and the rotating sleeve 1 generate relative sliding along the axial direction.

Thus, when the rotating sleeve 1 is screwed in to make the rotating sleeve 1 approach the external connection plate 22, the main rod 3 will be synchronously driven and move towards the direction opposite to the advancing direction of the rotating sleeve 1.

Referring to fig. 1 and 2, the main rod 3 is divided by the outrigger 2 into a large unthreaded polish rod 32 and a small threaded rod 33, which are away from the swivel nut 1. The main rod 3 is sleeved with a gasket 51, a first elastic member 52, a damping member 4, a second elastic member 61 and a blocking member 62 in sequence at a portion of the polish rod 32 in a direction from the outrigger 2 to a direction away from the outrigger 2.

The gasket 51 and the first elastic element 52 form a first elastic assembly 5, the end of the ejector rod 24 penetrates through the external frame 2 and then 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 one end of the damping element 4 close to the external frame 2. When the jack 24 is pushed toward the damping member 4, the first elastic member 52 will be compressed, and the pressure of the jack 24 will act on the end of the damping member 4 near the external frame 2 through the gasket 51 and the first elastic member 52.

The second elastic component 61 and the blocking component 62 form a second elastic assembly 6, the blocking component 62 is in threaded connection with the threaded rod 33 of the main rod 3, and two ends of the second elastic component 61 respectively abut against one end of the damping component 4 far away from the external frame 2 and the end face of the blocking component 62 close to the external frame 2. When the ram 24 advances, the primary rod 3 also moves backward in the opposite direction, the second elastic member 61 is compressed, and the pressure of the primary rod 3 acts on the end of the damping member 4 away from the outrigger 2 through the blocking member 62 and the second elastic member 61, so as to form a clamping force of the damping member 4.

For the first elastic member 52 and the second elastic member 61, the first elastic member 52 and the second elastic member 61 are springs in the present embodiment, and may also be disc springs in other embodiments.

Furthermore, in other embodiments, the first elastic component 5 and the second elastic component 6 may be an integral elastic structure, such as an elastic expansion device, a spring tube, etc. However, any structure that can be inserted on the main rod 3 and provide an axial elastic force should be considered as the scope of the first elastic component 5 and the second elastic component 6 in the present application.

As for the damper 4, the damper 4 in this embodiment includes two damper pieces 41. These two damping fins 41 cup joint in mobile jib 3, and the damping speed reduction module of treating that is held is located between two damping fins 41, and mobile jib 3 also wears to locate this damping speed reduction module of treating. In other embodiments, the damping member 4 may be an integral clamp or clip. However, any structure capable of bearing pressure at both ends and forming compression damping in the middle should be considered as the scope of the damping member 4 of the present application.

Referring to fig. 2 and 4, in order to improve the convenience of operation, a handle 7 is further disposed at an end of the turnbuckle 1 away from the external frame 2, the handle 7 is provided with a slot 71, and two locking protrusions 72 are integrally formed in the slot 71. The rotary sleeve 1 is embedded in the embedded groove 71, and two notches 12 matched with the clamping protrusions 72 for stopping rotation are formed in the side wall of the rotary sleeve 1. The handle 7 is provided with a locking screw 73 at the position of the embedded groove 71, and the locking screw 73 is arranged on the side wall of the rotary sleeve 1 and is in threaded connection with the rotary sleeve 1.

The implementation principle of the embodiment 1 is as follows:

referring to fig. 1 and 2, for convenience of description, a direction in which the swivel nut 1 is rotated and then moved toward the external bracket 2 is defined as a right direction, and a corresponding rotation direction is defined as a forward direction.

When the damping needs to be increased to achieve the purpose of deceleration:

the handle 7 is rotated to enable the rotary sleeve 1 to rotate in the positive direction, the rotary sleeve 1 moves rightwards relative to the external frame 2 and pushes the ejector rod 24, the ejector rod 24 pushes the gasket 51 to move rightwards and compresses the first elastic piece 52, and the first elastic piece 52 applies a rightwards acting force to the damping sheet 41.

Synchronously, the main rod 3 rotates reversely and moves leftwards relative to the outrigger 2, the blocking member 62 synchronously moves leftwards and compresses the second elastic member 61, and the second elastic member 61 applies a leftward acting force to the damping fin 41. Thereby causing the two damping plates 41 to press against the external part to be decelerated.

When damping reduction is required for acceleration purposes: the handle 7 is rotated in the reverse direction.

When there is a difference in the forces on the left and right sides of the damping member 4: after the rotating sleeve 1 is rotated reversely, the positions of the first elastic element 52 and the second elastic element 61 are adjusted to ensure that the first elastic element 52 is not contacted with the damping element 4, and then the rotating sleeve 1 is rotated forwardly to ensure that the first elastic element 52 is just contacted with the damping element 4. Then, the blocking member 62 is rotated in the forward or reverse direction so that the second elastic member 61 is just in contact with the damping member 4.

Example 2:

referring to fig. 5, the present embodiment is different from embodiment 1 in that the rotation stop head 31 includes a cylindrical head portion 311 and a protrusion 312 protruding from a peripheral side wall of the head portion 311. The rotation stopping groove 11 includes a main groove 111 and a card groove 112 opened on the inner wall, and when the head 311 is inserted into the main groove 111, the protrusion 312 is also inserted into the card groove 112. The width of the card slot 112 in the circumferential direction of the main slot 111 is larger than the width of the projection 312 in the circumferential direction of the main slot 111.

Thus, when the rotating sleeve 1 is separated from the main rod 3 due to over-rotation, if there is a deviation in the angle during re-docking due to external force, vibration, etc., the docking can still be smoothly performed due to the allowance between the engaging groove 112 and the protrusion 312.

In addition, based on the solution of the present embodiment, it is also possible to design: at the beginning of the screwing of the rotating sleeve 1, the main rod 3 is not butted with the rotating sleeve 1 firstly, so that the first elastic component 5 applies pressure to the damping part 4 on one side firstly, the rotating sleeve 1 is butted with the main rod 3 to stop screwing in the process of continuing screwing the rotating sleeve 1, then the second elastic component 6 continues to apply pressure, multistage speed reduction regulation and control are formed, and the speed reduction regulation and control range is greatly increased.

Example 3:

referring to fig. 6 and 7, the present embodiment is different from the embodiment in that an inner groove 13 is formed in the swivel sleeve 1, the inner groove 13 is embedded with a docking sleeve 15, and the docking sleeve 15 can slide relative to the inner groove 13 along the axial direction of the main rod 3. A third elastic element 14 is abutted between the end face of the butting sleeve 15 far away from the damping element 4 and the axial end face of the inner groove 13, and the third elastic element 14 is a spring in the embodiment. The circumferential side wall of the butt-joint sleeve 15 is provided with a convex strip 16 extending along the axial direction of the main rod 3, and the inner groove 13 is concavely provided with a groove 17 matched with the convex strip 16 for stopping rotation.

The rotary sleeve 1 and the butt sleeve 15 jointly penetrate to form a through groove, the through groove is a stop-rotation groove 11, and the central line of the stop-rotation groove 11 is collinear with the axis of the inner groove 13.

Thus, after the rotating sleeve 1 is separated from the main rod 3 due to over rotation, if there is a deviation in the angle during re-butting due to external force, vibration and the like, the butting sleeve 15 can be extruded and translated, the rotating sleeve 1 can be continuously rotated until the shapes of the end surfaces of the rotation stopping groove 11 and the rotation stopping end 31 are exactly opposite, and the third elastic element 14 enables the butting sleeve 15 and the rotation stopping end 31 to be butted, so that smooth butting of the rotation stopping groove 11 and the rotation stopping end 31 is realized.

In addition, based on the solution of the present embodiment, it is also possible to design: at the beginning of the screwing of the rotating sleeve 1, the main rod 3 is not butted with the rotating sleeve 1 firstly, so that the first elastic component 5 applies pressure to the damping part 4 on one side firstly, the rotating sleeve 1 is butted with the main rod 3 to stop screwing in the process of continuing screwing the rotating sleeve 1, then the second elastic component 6 continues to apply pressure, multistage speed reduction regulation and control are formed, and the speed reduction regulation and control range is greatly increased.

Example 4:

the embodiment of the application also discloses an adjustable sofa. Referring to fig. 8 and 9, an adjustable sofa comprises the bidirectional speed adjusting device of any one of embodiments 1-3. Also comprises a base frame 8, a seat frame 9 and a backrest frame 10.

The base frame 8 includes an under frame 81 and two handle frames 82, the handle frames 82 are fixed to both sides of the under frame 81, and the seat frame 9 and the back rest frame 10 are located between the two handle frames 82.

The rotation shaft 101 is connected between the backrest frame 10 and the armrest frame 82, the backrest frame 10 can rotate around the base frame 8 by taking the rotation shaft 101 as a rotation center, the rotation shaft 101 is arranged in the middle area where the back of a person leans against, and the rotation of the backrest frame 10 cannot be caused by normal leaning of the person. The seat frame 9 is hinged with the backrest frame 10, a track block 91 is fixed at the bottom of the seat frame 9, and a slide 911 is arranged on the track block 91 in a penetrating way.

Each handrail frame 82 is matched with a speed regulating device, the two speed regulating devices are symmetrically arranged, and the thread directions of the rotary sleeves 1 of the two speed regulating devices are opposite.

The outer frame 2 of the speed adjusting device is fixed on the handrail frame 82, wherein the outer plate 22 and the handrail frame 82 are fixed through bolts, and the base body 21 penetrates through the handrail frame 82. The handle 7 is located on the outside of the armrest frame 82. The spacer 51, the first elastic member 52, the damper 41, the second elastic member 61 and the stopper 62 are located inside the armrest frame 82, and the two damper 41 are respectively abutted against both sides of the rail block 91. The main rod 3 penetrates through the slide 911, and the track block 91 is limited to move and rotate relative to the main rod 3 by taking the main rod 3 and the slide 911 as tracks.

The implementation principle of the embodiment of the application is as follows:

the rotation shaft 101 is provided in the middle region where the back of the person leans against, and normal leaning does not cause the backrest to rotate.

When the upper end of the back frame 10 is broken, the back frame 10 is turned backward around the rotation shaft 101, and the bottom of the back frame 10 is turned forward. Correspondingly, the seat frame 9 moves forwards along the slide 911 and turns over, and the sofa changes from a sitting posture to a lying posture. In the process, the main rod 3 is used as a limiting structure of the track block 91, so that the seat frame 9 moves along a determined track, and meanwhile, the damping piece 4 damps and decelerates the track block 91 on two sides of the track block 91, thereby avoiding potential safety hazards caused by the fact that the seat frame 9 and the backrest frame 10 are overturned too fast.

When speed regulation is needed: the rotating sleeve 1 can rotate in the same direction no matter the damping is increased to achieve deceleration or reduced to achieve acceleration.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A bidirectional speed regulating device is characterized in that: including rotating cover (1), outrigger (2) and mobile jib (3), cover (1) and outrigger (2) threaded connection soon, mobile jib (3) wear to locate outrigger (2) and with outrigger (2) threaded connection, the screw thread of rotating cover (1) and the screw thread of mobile jib (3) revolve to opposite, can drive mobile jib (3) to rotate when rotating cover (1), mobile jib (3) cover is equipped with and externally produces damped damping piece (4) through the mode of centre gripping, the both ends of damping piece (4) are equipped with first elastic component (5) and second elastic component (6) respectively, it can promote first elastic component (5) towards damping piece (4) to move to revolve cover (1), mobile jib (3) can promote second elastic component (6) and remove towards damping piece (4).

2. A two-way speed regulating device according to claim 1, wherein: an ejector rod (24) penetrates through the external connection frame (2), one end of the ejector rod (24) is abutted to the rotating sleeve (1) and can be pushed by the rotating sleeve (1) to slide along the length direction of the main rod (3), and the other end of the ejector rod (24) is abutted to the first elastic assembly (5).

3. A two-way speed regulating device according to claim 2, wherein: the first elastic component (5) comprises a gasket (51) and a first elastic piece (52), the main rod (3) is sleeved with the first elastic piece (52), two ends of the first elastic piece (52) respectively abut against the gasket (51) and the damping piece (4), and the ejector rod (24) abuts against the end face of the gasket (51).

4. A two-way speed regulating device according to claim 1, wherein: the second elastic assembly (6) comprises a blocking piece (62) and a second elastic piece (61), the blocking piece (62) is connected with the main rod (3) and moves along with the movement of the main rod (3), and two ends of the second elastic piece (61) respectively abut against the damping piece (4) and the blocking piece (62).

5. The bidirectional speed regulating device according to claim 4, wherein: the blocking piece (62) is in threaded connection with the main rod (3).

6. A two-way speed regulating device according to claim 1, wherein: the tip of mobile jib (3) has end (31) of only revolving, be equipped with in revolving sleeve (1) and only revolve end (31) cooperation end groove (11) of only revolving, end (31) of only revolving can be followed the axial of mobile jib (3) and slided in only revolving groove (11).

7. A two-way speed regulating device according to claim 1, wherein: still include handle (7), handle (7) are equipped with caulking groove (71), cover (1) and caulking groove (71) scarf joint soon, handle (7) are worn to be equipped with locking screw (73) in the position at caulking groove (71) place, locking screw (73) are worn to locate the lateral wall of revolving cover (1) and are overlapped (1) threaded connection soon.

8. A two-way speed regulating device according to claim 7, wherein: the embedded groove (71) is internally provided with a plurality of clamping protrusions (72), and the side wall of the rotary sleeve (1) is provided with a plurality of notches (12) which are matched with the clamping protrusions (72) to stop rotation.

9. An adjustable sofa chair, which is characterized in that: the speed regulating device comprises a speed regulating device according to any one of claims 1 to 8, and further comprises a base frame (8), a seat frame (9) and a backrest frame (10), wherein a rotating shaft (101) is connected between the backrest and the base frame (8), the backrest frame (10) can rotate around the base frame (8) by taking the rotating shaft (101) as a rotating center, the seat frame (9) is hinged with the backrest frame (10), a track block (91) is fixed at the bottom of the seat frame (9), and a slide rail (911) penetrates through the track block (91); the external frame (2) is fixed in bed frame (8), slide (911) are worn to locate in mobile jib (3), and relative mobile jib (3) removal and rotation are injectd as the orbit to track piece (91) with mobile jib (3) and slide (911), damping piece (4) centre gripping is in the both sides of track piece (91).

10. The adjustable sofa of claim 9, wherein: the bed frame (8) includes chassis (81) and two handrail frame (82), handrail frame (82) are located the both sides of seat frame (9), and every handrail frame (82) match a speed adjusting device, and two speed adjusting device symmetries set up, and the cover (1) screw thread soon of two speed adjusting device is to opposite, it is located one side that seat frame (9) were kept away from to handrail frame (82) to revolve cover (1).

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