Sofa and manual sofa backrest horizontal front-back push-pull structure

Abstract

The utility model relates to the technical field of furniture, in particular to a horizontal front-back push-pull structure of a sofa and a manual sofa backrest, and the horizontal front-back push-pull structure of the manual sofa backrest comprises a sliding rod, a plurality of tooth grooves are formed in the sliding rod at intervals in the axis direction, and at least one of the tooth grooves located in the middle is a long-strip-shaped groove extending in the axis direction of the sliding rod; the sliding block is slidably arranged on the sliding rod in the axis direction of the sliding rod; the crawling gear is rotationally installed on the sliding block and meshed with the tooth groove, and the one-way moving assembly is movably installed on the sliding block; the switching assembly is movably installed on the sliding block, the control assembly is connected with the sliding block, and the control assembly is used for limiting the crawling gear to move forwards farthest to the end, close to the terminal of the sliding rod, of the long-strip-shaped groove; and the control assembly relieves the rotation limitation on the crawling gear. In the sliding process of the backrest, a user can clearly know that the backrest slides to the end point, and the situation that the user is injured due to the fact that the user does not know that the backrest is unlocked is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of furniture, and in particular to a sofa and a manual sofa backrest horizontal forward and backward push-pull structure. Background Art

[0002] Sofas and chairs are commonly used household products, generally including a seat, a backrest and a headrest, which can realize a resting posture of sitting or lying. In order to meet the different needs of users for sitting depth, a function of rotating the backrest in two gears is added.

[0003] When adjusting the seat depth, existing sofas are usually equipped with a ratchet-like structure to prevent the sofa from moving backwards, so that the sofa can only slide forwards but not backwards. When the backrest slides to the end position, the restriction can be released and the sofa can move directly backwards to the starting point. After that, a certain structure is triggered to restore the restriction of the ratchet structure, so that the sofa can only move forwards but not backwards.

[0004] However, when the backrest moves to the end point, the ratchet structure immediately releases the restriction. At this time, the user may not know that the ratchet structure has released the restriction. If the user leans directly on the backrest at this time, the backrest will slide directly to the starting point, which may easily cause a safety hazard. Summary of the invention

[0005] The purpose of the present application is to provide a manual sofa backrest horizontal forward and backward pushing and pulling structure and a sofa, which can allow the user to clearly know that the backrest has slid to the end point during the sliding process of the backrest, thereby reducing the possibility of injuries to the user due to not knowing that the backrest has been unlocked.

[0006] In the first aspect, the manual sofa backrest horizontal forward and backward push-pull structure provided in the present application adopts the following technical solution:

[0007] A manual sofa backrest horizontally push-pull structure, comprising:

[0008] A slide bar, one end of which is a starting end and the other end is a terminal end, wherein the slide bar is provided with a plurality of tooth grooves spaced apart along the axis direction, and at least one of the tooth grooves in the middle is a long strip groove extending along the axis direction of the slide bar;

[0009] A slider is slidably disposed on the slide bar along the axis direction of the slide bar;

[0010] A creeping gear is rotatably mounted on the slider and meshes with the tooth groove, and when the slider slides forward from the starting end to the terminal end, it can drive the creeping gear to rotate;

[0011] A one-way moving component is movably mounted on the slider and has a locking position for limiting the one-way rotation of the creeping gear and an unlocking position for releasing the restriction;

[0012] a switching component, movably mounted on the slider, and used to switch the one-way moving component between a locked position and an unlocked position when the switching component moves; and

[0013] A control component is connected to the slider and has a first state and a second state. When the slider moves forward, the one-way moving component is located in a locked position, and the control component is in the first state, which is used to limit the crawling gear from moving forward to the end of the long slot close to the terminal of the slide bar; when the slider drives the control component to move to abut against the seat body and the crawling gear moves back and forth in the long slot, the control component switches to the second state, releasing the rotation restriction on the crawling gear, and the crawling gear can continue to rotate forward to bypass the long slot;

[0014] When the creeping gear bypasses the long groove, the switching component moves, causing the one-way moving component to switch to the unlocked position; when the slider moves to the starting end, the switching component moves, causing the one-way moving component to switch from the unlocked position to the locked position.

[0015] By adopting the above technical solution, the restriction on the moving distance of the slider can be released through the reciprocating movement of the slider in the long groove, so that the slider can slide to the end of the slide rod. Only then can the movement of the switching component be realized, and the restriction on the unidirectional movement of the slider can be released, ensuring that the user can clearly know that the slider has moved to the terminal position, thereby reducing the occurrence of safety accidents caused by the user not knowing that the slider has released the restriction on the unidirectional movement.

[0016] Optionally, the one-way moving component includes a locking gear and a locking claw, wherein the locking gear is fixedly connected to the creeping gear, and the locking claw is movably connected to the slider and can mesh with the locking gear;

[0017] When the slider moves toward the end of the slider, the creeping gear can drive the locking claw away from the locking gear; when the slider moves toward the starting end of the slider, the creeping gear can drive the locking claw to move to mesh with the locking gear;

[0018] The switching assembly is used to limit the movement of the locking claw when it is in the unlocking position, so that the one-way moving assembly is kept in the unlocking position.

[0019] By adopting the above technical solution, the creeping gear is restricted by the meshing of the locking claw and the locking gear, thereby limiting the position of the slider. The structural connection is stable and can ensure that the locking claw is meshed with the locking gear at any time, thereby realizing stepless adjustment of the slider.

[0020] Optionally, the one-way moving assembly further includes a driving member, the driving member includes an end cover, the end cover is rotatably connected to the creeper gear, and the creeper gear can drive the end cover to rotate;

[0021] The end cover is provided with a waist-shaped hole, the locking claw is fixedly connected with a connecting rod, and the connecting rod is inserted into the waist-shaped hole and can slide in the waist-shaped hole;

[0022] The sliding block is provided with a sliding groove, the locking claw is fixedly connected with a sliding shaft, and the sliding shaft is inserted into the sliding groove and can slide in the sliding groove.

[0023] By adopting the above technical solution, the creeping gear rotates to drive the end cover to rotate, so that the end cover drives the locking claw to move, thereby increasing the operation automation of the push-pull structure and facilitating the locking claw to lock the slider moving in the opposite direction in real time.

[0024] Optionally, the slider is fixedly connected to a rotating shaft, the creeping gear and the end cover are rotatably mounted on the rotating shaft, a limiting protrusion is fixedly connected to the rotating shaft, the end cover is arranged between the limiting protrusion and the creeping gear, and the driving member also includes a damping member, which is arranged between the limiting protrusion and the end cover and is used to increase the friction between the end cover and the creeping gear.

[0025] By adopting the above technical solution and arranging a damping member, the friction between the end cover and the creeper gear is increased, so that the creeper gear can stably drive the end cover to rotate.

[0026] Optionally, the switching assembly includes a locking rod and an escape opening formed on the locking rod;

[0027] When the locking rod abuts against the locking claw, the sliding shaft abuts against the inner wall of one end of the sliding groove, so that the one-way moving component is in an unlocked state and the movement of the locking claw is restricted;

[0028] When the locking claw corresponds to the position of the avoidance opening, the limiting of the locking claw is released.

[0029] By adopting the above technical solution, when the locking rod moves, the avoidance opening and the locking claw can correspond to or stagger with each other, thereby achieving the limiting and unlocking of the locking claw, and the one-way movement restriction on the slider can be released or opened.

[0030] Optionally, the control assembly includes a driving plate, a mounting plate and a rotating block, the mounting plate is fixedly connected to the slider, the driving plate is provided with an L-shaped through slot and is slidably mounted on the mounting plate along the axis direction of the slide bar, the rotating block is rotatably connected to the mounting plate and is located in the through slot, and the driving plate is provided with a protrusion that matches the rotating block;

[0031] When the driving plate slides backward relative to the mounting plate for the first time, the protrusion cooperates with the rotating block to limit the movement of the mounting plate. When the driving plate moves forward first and slides backward relative to the mounting plate again, the protrusion releases the restriction on the movement of the mounting plate.

[0032] An elastic member is arranged between the mounting plate and the driving plate, one end of the elastic member acts on the driving plate, and the other end of the elastic member acts on the mounting plate.

[0033] By adopting the above technical solution, by setting the protrusion and the rotating block, the creeping gear can move back and forth in the long groove before the switching component can be moved, ensuring that the user can fully understand that the slider has moved to the terminal, reducing safety accidents caused by the user during use.

[0034] Optionally, the protrusion includes a first protrusion and a second protrusion arranged opposite to each other at the corner of the through groove, and notches are provided on two mutually symmetrical end faces of the rotating block, and the first protrusion and the second protrusion are both adapted to the notches;

[0035] When the creeping gear moves forward in the long groove for the first time, the driving plate slides relative to the mounting plate and the first protrusion is inserted into the corresponding notch, so that the rotating block rotates;

[0036] When the creeping gear slides from the proximal end of the long slot to the distal end of the long slot again, the first protrusion abuts against the side wall of the rotating block and can push the rotating block to insert into the rear end of the through slot.

[0037] By adopting the above technical solution, the crawling gear is unlocked after reciprocating motion through the cooperation of the first protrusion, the second protrusion and the rotating block, thereby increasing the automation degree of the push-pull structure and facilitating user operation.

[0038] Optionally, there are multiple sliding rods, the multiple sliding rods are arranged parallel to each other and the sliding block is slidably arranged on each sliding rod, and connecting plates are arranged between adjacent sliding blocks, and the connecting plates are fixedly connected to adjacent sliding blocks respectively.

[0039] By adopting the above technical solution: by providing a plurality of sliders, when installing the backrest, the plurality of sliders can be connected to the backrest, thereby increasing the stability of the sliding of the backrest.

[0040] In the second aspect, the present application provides a method of use, the specific steps are as follows:

[0041] S1: Push the slider to move toward the terminal, so that the creeping gear moves to the far end of the long slot;

[0042] S2: Push the slider to move toward the starting end, so that the creeping gear moves to the near end of the long groove, so that the control component releases the rotation restriction on the creeping gear;

[0043] S3: Push the slider to move to the terminal, and the switching component releases the restriction on the unidirectional movement of the slider;

[0044] S4: Push the slider to move to the starting end and enable the switching component to start limiting the one-way movement of the slider.

[0045] By adopting the above technical solution, the restriction on the moving distance of the slider is released through the reciprocating motion of the slider, ensuring that the user can fully understand that the slider has moved to the terminal, thereby reducing safety accidents caused by the user during use.

[0046] In the third aspect, the sofa provided in the present application adopts the following technical solution:

[0047] A sofa comprises a manual sofa backrest horizontal forward and backward push-pull structure, a seat body and a backrest, wherein the manual sofa backrest horizontal forward and backward push-pull structure is installed in the seat body, the backrest is slidably connected to the seat body, and the slider is connected to the backrest and can drive the backrest to move.

[0048] By adopting the above technical solution, the restriction on the moving distance of the backrest is removed through the reciprocating motion of the backrest, ensuring that the user can fully understand that the backrest has moved to the terminal, thereby reducing safety accidents caused by the user during use.

[0049] In summary, the present application includes at least one of the following beneficial technical effects:

[0050] 1. The slider moves back and forth in the long groove to release the restriction on the moving distance of the slider, so that the slider can slide to the end of the slider bar. Only then can the switching component be moved, and the restriction on the unidirectional movement of the slider can be released, so that the user can clearly know that the slider has moved to the terminal position, reducing the possibility of safety accidents caused by the user not knowing that the slider has released the restriction on unidirectional movement;

[0051] 2. Through the meshing of the locking claw and the locking gear, the creeping gear is restricted, and then the slider is limited. The structural connection is stable and can ensure that the locking claw is meshed with the locking gear at any time, so as to achieve stepless adjustment of the slider;

[0052] 3. By providing the raised portion and the rotating block, the creeping gear can move back and forth in the long groove before the switching assembly can be moved, ensuring that the user can fully understand that the slider has moved to the terminal, thereby reducing safety accidents caused by the user during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1It is a schematic diagram of the overall structure of a sofa according to an embodiment of the present application.

[0054] Figure 2 It is a schematic diagram of the overall structure of the manual sofa backrest horizontal forward and backward push-pull structure in the embodiment of the present application.

[0055] Figure 3 It is a structural schematic diagram used to reflect the installation position of the one-way moving component in an embodiment of the present application.

[0056] Figure 4 yes Figure 3 A partial enlarged schematic diagram of part A.

[0057] Figure 5 It is a schematic diagram of the partial explosion structure of the one-way moving component of the embodiment of the present application.

[0058] Figure 6 It is a schematic diagram of the first state of the control component in the embodiment of the present application.

[0059] Figure 7 It is a schematic diagram of the second state of the control component in the embodiment of the present application.

[0060] Figure 8 It is a schematic diagram of the third state of the control component in the embodiment of the present application.

[0061] Fig. 9 It is a schematic diagram of the fourth state of the control component in the embodiment of the present application.

[0062] In the figure, 1, slide bar; 11, tooth groove; 12, long groove;

[0063] 2. Slider; 21. Left plate; 22. Right plate; 23. Cavity; 24. Slide; 25. Rotating shaft; 26. Limiting protrusion;

[0064] 3. Connecting plate;

[0065] 4. Creeping gear;

[0066] 5. One-way moving component; 51. Locking gear; 52. Locking claw; 521. Connecting rod; 522. Sliding shaft; 53. Driving member; 531. End cover; 5311. Waist-shaped hole; 532. Damping member;

[0067] 6. Switching assembly; 61. Locking lever; 62. Escape opening;

[0068] 7. Control assembly; 71. Mounting plate; 72. Driving plate; 721. First notch; 722. Second notch; 723. First protrusion; 724. Second protrusion; 73. Rotating block; 731. First notch; 732. Second notch; 74. Elastic member;

[0069] 81. backrest; 82. seat body; 821. avoidance groove; 83. dorsal fin;

[0070] 9. Baffle. DETAILED DESCRIPTION

[0071] The following is combined with Figure 1 -Attached Fig. 9 , further details of this application are given.

[0072] A manual sofa backrest horizontal push-pull structure, referring to Figure 2 , including a slide bar 1 and a slider 2 slidably connected to the slide bar 1, the slider 2 can be connected to the backrest 81 of the sofa, and the backrest 81 is driven to move by the sliding of the slider 2 to adjust the depth of the sofa seat. There are multiple slide bars 1. In this embodiment, there are two slide bars 1. The two slide bars 1 are symmetrically arranged. Each slide bar 1 is provided with one of the above-mentioned sliders 2. The two sliders 2 are connected to the backrest 81 to drive the backrest 81 to move, so that the movement of the backrest 81 is more stable. In order to make the two sliders 2 more closely connected, a connecting plate 3 is arranged between the two sliders 2, and the connecting plate 3 is fixedly connected to the two sliders 2 respectively. One end of the slide bar 1 is the starting end and the other end is the terminal end. The slider 2 slides from the starting end to the terminal end to adjust the depth of the sofa seat.

[0073] Reference Figure 3 The slider 2 includes a left plate 21 and a right plate 22, which are symmetrically arranged. In this embodiment, the left plate 21 and the right plate 22 are fixed to each other by bolts to form the slider 2, and the slider 2 is sleeved on the slide bar 1. By dividing the slider 2 into the left plate 21 and the right plate 22, the installation and removal of the slider 2 are facilitated.

[0074] In order to reduce the friction between the slider 2 and the slide rod 1, bearings are installed on the end surfaces of the left plate body 21 and the right plate body 22 that are close to each other. The bearings abut against the slide rod 1. The bearings contact with the slide rod 1 and roll on the slide rod 1, thereby reducing the friction between the slider 2 and the slide rod 1 and further reducing the wear of the slider 2.

[0075] Reference Figure 3 and Figure 4 A manual sofa backrest horizontal forward and backward push-pull structure also includes a crawling gear 4, which is rotatably connected to the slider 2. In this embodiment, a cavity is provided between the left plate 21 and the right plate 22, and the crawling gear 4 is rotatably connected in the cavity; a plurality of tooth grooves 11 are provided on the slide bar 1, and the plurality of tooth grooves 11 are evenly spaced along the length direction of the slide bar 1, and the crawling gear 4 can be inserted into the corresponding tooth grooves 11. When the slide bar 2 slides on the slide bar 1, the crawling gear 4 crawls and rotates along the distribution direction of the plurality of tooth grooves 11. During the rotation of the crawling gear 4, the teeth on the crawling gear 4 are sequentially inserted into the symmetrical tooth grooves 11.

[0076] A one-way moving component 5 is arranged between the slider 2 and the slide bar 1. The one-way moving component 5 is used to limit the one-way movement of the slider 2 on the slide bar 1. The one-way moving component 5 has a locking position for limiting the one-way rotation of the crawling component and an unlocking position for releasing the restriction. When the slider 2 slides from the starting end of the slide bar 1 to the terminal end of the slide bar 1, the one-way moving component 5 is in the unlocking position, and the slider 2 can slide normally at this time; when the slider 2 slides to the starting end of the slide bar 1, the one-way moving component 5 is in the locking position, thereby limiting the sliding of the slider 2; that is, the slider 2 can only slide from the starting end of the slide bar 1 to the terminal end of the slide bar 1, thereby realizing the one-way movement of the slider 2.

[0077] Reference Figure 4 and Figure 5 The one-way moving component 5 includes a locking gear 51, a locking claw 52 and a driving member 53. The locking gear 51 is fixedly connected to the crawling gear 4 and is coaxially arranged with the crawling gear 4. In the present embodiment, the locking gear 51 is arranged between the crawling gear 4 and the inner wall of the cavity 23. In other embodiments, the crawling gear 4 may also be arranged between the locking gear 51 and the inner wall of the cavity 23, as long as the locking claw 52 and the locking gear 51 are in corresponding positions.

[0078] The locking gear 51 is rotatably connected to the inner wall of the cavity 23, thereby realizing the rotational connection between the creeping gear 4 and the inner wall of the cavity 23. In this embodiment, a second rotation is fixedly connected to the inner wall of the cavity 23, and the locking gear 51 and the creeping gear 4 are both rotatably sleeved on the rotating shaft 25, thereby realizing the rotational connection between the locking gear 51 and the inner wall of the cavity 23.

[0079] The locking claw 52 is slidably connected to the inner wall of the cavity 23, and a plurality of teeth that can mesh with the locking gear 51 are fixedly connected to the end surface of the locking claw 52 close to the locking gear 51. The driving member 53 is connected to the locking claw 52 and can drive the locking claw 52 to approach or move away from the locking gear 51, thereby achieving meshing and separation of the locking claw 52 and the locking gear 51.

[0080] In this embodiment, when the slider 2 slides toward the terminal end of the slide bar 1, the driving member 53 drives the locking claw 52 away from the locking gear 51, so that the locking claw 52 is separated from the locking gear 51. When the slider 2 slides toward the starting end of the slide bar 1, the driving member 53 drives the locking claw 52 to approach the locking gear 51, so that the locking claw 52 is engaged with the locking gear 51, thereby limiting the rotation of the locking gear 51, that is, limiting the rotation of the creeping gear 4, realizing the limiting of the slider 2, that is, realizing the unidirectional movement of the slider 2.

[0081] In other embodiments, a ratchet pawl may be used to replace the locking gear 51 and the locking pawl 52 . The pawl is rotatably connected to the inner wall of the cavity 23 . The ratchet pawl mechanism has a one-way locking function to achieve one-way movement of the slider 2 .

[0082] A slide groove 24 is provided on the inner wall of the cavity 23, and a sliding shaft 522 is fixedly connected to the locking claw 52. In the present embodiment, there are two sliding shafts 522, and the two sliding shafts 522 are respectively fixed at both ends of the locking claw 52. In the present embodiment, the end of the slide groove 24 close to the starting end of the slide rod 1 is the proximal end, and the end of the slide groove 24 away from the starting end is the distal end. When one of the sliding shafts 522 slides to the distal end of the slide groove 24, the locking claw 52 is separated from the locking gear 51. When the other sliding shaft 522 slides to the proximal end of the slide groove 24, the locking claw 52 is meshed with the locking gear 51, and the rotation of the locking gear 51 is restricted.

[0083] The driving member 53 includes an end cover 531 and a damping member 532. The end cover 531 is rotatably connected to the creeper gear 4. In this embodiment, the end cover 531 is rotatably sleeved on the rotating shaft 25 to realize the rotatable connection between the end cover 531 and the creeper gear 4. The damping member 532 is used to increase the friction between the end cover 531 and the creeper gear 4. In this embodiment, the end of the rotating shaft 25 away from the end cover 531 is fixedly connected to the limiting protrusion 26. The end cover 531 is arranged between the limiting protrusion 26 and the creeper gear 4. The limiting protrusion 26 is used to limit the sliding of the end cover 531 along the axial direction of the rotating shaft 25. The damping member 532 adopts a spring sheet, which is sleeved on the rotating shaft 25 and arranged between the end cover 531 and the limiting protrusion 26. The friction between the end cover 531 and the creeper gear 4 is increased by the elastic force of the spring sheet. In other embodiments, the damping member 532 may also be a rubber pad, which is disposed between the end cover 531 and the creeper gear 4 . The rubber pad increases the friction between the end cover 531 and the creeper gear 4 , thereby increasing the difficulty of rotating the end cover 531 .

[0084] The end cover 531 is provided with a waist-shaped hole 5311, and the locking claw 52 is fixedly connected with a connecting rod 521, which is inserted into the waist-shaped hole 5311 and can rotate and slide in the waist-shaped hole 5311. When the slider 2 slides toward the end of the slider 1, the creeper gear 4 rotates, driving the end cover 531 to rotate, so that the end cover 531 drives the locking claw 52 to move downward, and at this time, the sliding shaft 522 abuts against the inner wall of the far end of the slide groove 24, limiting the sliding shaft 522 from sliding further, thereby limiting the rotation of the end cover 531, and at this time, the locking claw 52 is separated from the locking gear 51, and the creeper gear 4 moves normally.

[0085] When the slider 2 moves toward the starting end of the slide rod 1, the creeping gear 4 drives the end cover 531 to rotate, so that the end cover 531 drives the locking claw 52 to move, so that the sliding shaft 522 close to the proximal end of the slide groove 24 slides until it abuts against the proximal inner wall of the slide groove 24. At this time, the locking claw 52 is engaged with the locking gear 51, and the locking claw 52 is restricted by the inner wall of the slide groove 24 to continue moving, thereby realizing the restriction of the locking gear 51, that is, the restriction of the creeping gear 4, and restricting the slider 2 from sliding toward the starting end of the slide rod 1.

[0086] The slider 2 is provided with a switching component 6, which is used to contact or lock the one-way movement limit of the one-way moving device, that is, the switching component 6 can limit the movement of the locking claw 52. When the switching component 6 moves, it is used to realize the switching of the one-way moving component 5 between the locked position and the unlocked position. When the slider 2 moves to the terminal end, the switching component 6 moves to switch the one-way moving component 5 from the locked position to the unlocked position; when the slider 2 moves to the starting end, the switching component 6 moves to switch the one-way moving component 5 from the unlocked position to the locked position.

[0087] The switching assembly 6 includes a locking rod 61 and an escape opening 62 provided on the locking rod 61. The locking rod 61 is slidably arranged on the slider 2. In the present embodiment, the locking rod 61 is arranged between the left plate 21 and the right plate 22. Both ends of the locking rod 61 pass through the slider 2. The slider 1 is fixedly connected with a baffle 9 at both ends. In the present embodiment, when the slider 2 slides to the end of the slider 1, the locking rod 61 abuts against the baffle 9. Under the push of the baffle 9, the locking rod 61 slides toward the starting end of the slider 1, so that the escape opening 62 and the locking claw 52 are staggered with each other. At this time, the locking claw 52 abuts against the locking rod 61. At this time, one of the sliding shafts 522 is at the far end of the slide groove 24, and the locking claw 52 is separated from the locking gear 51. The two mutually symmetrical inner side walls of the escape opening 62 are both arranged as inclined surfaces, so that the locking claw 52 can slide out of the escape opening 62 through the guiding effect of the inclined surfaces.

[0088] When the slider 2 slides to the starting end of the slide bar 1, the slide bar 1 slides close to the end of the slide bar 1 under the push of the baffle 9 at the starting end of the slide bar 1, so that the position of the locking claw 52 corresponds to the position of the avoidance opening 62, thereby releasing the lock of the locking claw 52, ​​so that the locking claw 52 can still cooperate with the locking gear 51 to achieve one-way locking.

[0089] In other embodiments, the baffle plate 9 may not be provided, and the baffle plate 9 may directly contact the sofa seat body 82 , as long as the locking rod 61 can be pushed to move.

[0090] In other embodiments, the switching component 6 can also be a locking rod 61 and a magnet. The locking claw 52 and the locking rod 61 are fixedly connected with a magnet. When the locking claw 52 needs to be limited, the magnet on the locking rod 61 is slid to a position corresponding to the position of the magnet on the locking claw 52. At this time, the two magnets attract each other, thereby realizing the movement of the locking claw 52 and switching the one-way moving component 5 to the unlocked position. When the one-way moving component 5 needs to be switched to the locked position, it is only necessary to slide the magnet on the locking rod 61 away from the magnet on the locking claw 52.

[0091] Reference Figures 6 to 9The manual sofa backrest horizontal forward and backward push-pull structure also includes a control component 7, which is connected to the slider 2. In this embodiment, the control component 7 is installed on the connecting plate 3 to achieve the connection between the control component 7 and the slider 2. In other embodiments, the control component 7 can also be directly installed on the slider 2.

[0092] At least one of the tooth grooves 11 located in the middle among the plurality of tooth grooves 11 is a long groove 12 extending along the axial direction of the slide bar 1, that is, at least one of the tooth grooves 11 between the tooth groove 11 at the starting end and the tooth groove 11 at the terminal end is a long groove 12, the end of the long groove 12 close to the starting end of the slide bar 1 is the proximal end, and the end of the long groove 12 close to the terminal end of the slide bar 1 is the distal end. In this embodiment, the long groove 12 is the tooth groove 11 adjacent to the tooth groove 11 at the terminal end.

[0093] The control component 7 has a first state and a second state. When the control component 7 is in the first state, it is used to limit the crawling gear 4 to move forward to the farthest end of the long groove 12. When the slider 2 drives the control component 7 to move to abut against the seat body 82 and the crawling gear 4 moves back and forth in the long groove 12, it switches to the second state to release the movement restriction of the crawling gear 4. The crawling gear 4 can rotate to the farthest tooth groove 11, that is, the crawling gear 4 can rotate to the tooth groove 11 at the end of the slide bar 1.

[0094] The control assembly 7 includes a mounting plate 71, a driving plate 72 and a rotating block 73. The mounting plate 71 is fixedly connected to the connecting plate 3. The driving plate 72 is mounted on the mounting plate 71 and can slide along the axis direction of the slide bar 1. A through slot is provided on the driving plate 72, and a protrusion corresponding to the rotating block 73 is provided in the through slot. The protrusion includes a first protrusion 723 and a second protrusion 724. The through slot includes a first notch 721 and a second notch 722. The first notch 721 is connected to the second notch 722, and the diameter of the second notch 722 is smaller than that of the first notch 721. The first protrusion 723 is formed at the connection between the inner wall of the first notch 721 and the second notch 722. The second protrusion 724 is fixedly connected to the inner wall of the first notch 721 away from the second notch 722. The first protrusion 723 and the second protrusion 724 correspond to each other. The rotating block 73 is rotatably connected to the mounting plate 71 and inserted into the first notch 721. Notches are formed on two symmetrical side walls of the rotating block 73 , which are respectively a first notch 731 and a second notch 732 . The first protrusion 723 and the second protrusion 724 are both matched with the first notch 731 and the first protrusion 723 and the second protrusion 724 are both matched with the second notch 732 .

[0095] An elastic member 74 is provided between the mounting plate 71 and the driving plate 72. One end of the elastic member 74 acts on the driving plate 72, and the other end of the elastic member 74 acts on the mounting plate 71. In this embodiment, the elastic member 74 is a spring, and both ends of the spring are fixedly connected to the driving plate 72 and the mounting plate 71 respectively.

[0096] When the slider 2 slides from the starting end to the terminal end and the creeping gear 4 is initially inserted into the proximal end of the long groove 12, the driving plate 72 abuts against the baffle 9, and the second protrusion 724 is inserted into the second notch 732;

[0097] The slider 2 continues to slide, and the creeping gear 4 slides from the proximal end of the long groove 12 to the distal end of the long groove 12. At this time, the baffle 9 pushes the driving plate 72 to move, so that the elastic member 74 stretches and the first protrusion 723 is inserted into the first notch 731, thereby driving the rotating block 73 to rotate, so that the second protrusion 724 and the second notch 732 are staggered. At this time, because the second protrusion 724 cooperates with the second notch 732, the slider 2 is restricted from continuing to move toward the terminal end of the slide rod 1.

[0098] Then move the slider 2 toward the starting end of the slide bar 1, so that the crawling gear 4 slides from the far end of the long groove 12 to the near end of the long groove 12. During the sliding process of the crawling gear 4, the elastic member 74 gradually recovers, thereby pulling the driving plate 72 to always abut against the baffle 9, and the mounting plate 71 follows the slider 2 to slide toward the starting end of the slide bar 1. At this time, the second protrusion 724 abuts against the side wall of the rotating block 73, thereby pushing the rotating block 73 to rotate, until the second protrusion 724 abuts against the inner wall of the first notch 721 to limit the rotation. At this time, the crawling gear 4 is located at the near end of the long groove 12, and the first protrusion 723 corresponds to the side wall of the rotating block 73.

[0099] Then slide the slider 2 toward the terminal end of the slider 1. When the creeper gear 4 slides to the far end of the long groove 12 again, the first protrusion 723 abuts against the side wall of the rotating block 73. The slider 2 continues to move, and the creeper gear 4 rotates to the tooth groove 11 at the terminal end. During this movement, the baffle 9 abuts against the drive plate 72 and pushes the drive plate 72 to move, so that the first protrusion 723 pushes the rotating block 73 to rotate to the position corresponding to the second notch 722, so that the rotating block 73 is inserted into the second notch 722 during the movement of the slider 2. Because the first protrusion 723 does not cooperate with the first notch 731 during the sliding of the slider 2 again, the restriction on the movement of the slider 2 is released.

[0100] The implementation principle of the embodiment of the present application is as follows: in the process of the slider 2 sliding from the starting end to the terminal end, when the crawling gear 4 is first inserted into the proximal end of the long groove 12, there is a gap between the locking rod 61 and the baffle 9, and the driving plate 72 abuts against the baffle 9. When the crawling gear 4 slides from the proximal end of the long groove 12 to the distal end of the long groove 12 for the first time, the first protrusion 723 is inserted into the first notch 731, thereby limiting the movement of the mounting plate 71, that is, limiting the movement of the slider 2. At this time, the locking rod 61 abuts against the baffle 9.

[0101] Then slide the slider 2 to make the crawling gear 4 slide from the far end of the long groove 12 to the near end of the long groove 12. This process causes the rotating block 73 to rotate, so that the first notch 731 and the first protrusion 723 are staggered with each other, and then slide the slider 2 toward the end of the slide rod 1. At this time, under the push of the first protrusion 723, the rotating block 73 is inserted into the first notch 721. At this time, the crawling gear 4 rotates to the tooth groove 11 at the end of the slide rod 1, and during the movement, the baffle 9 pushes the locking rod 61 to slide, so that the avoidance opening 62 on the locking rod 61 and the locking claw 52 are staggered with each other, that is, the locking claw 52 abuts against the locking rod 61 and is restricted from moving by the locking rod 61, so that the locking claw 52 is always separated from the locking gear 51.

[0102] At this time, the one-way movement restriction of the slider 2 is released, and the slider 2 is slid to the starting end, so that the baffle 9 at the starting end pushes the locking rod 61 to move, so that the locking claw 52 corresponds to the avoidance opening 62 again, the restriction on the locking claw 52 is released, and the one-way movement restriction of the slider 2 is restarted.

[0103] The present application also discloses a method for using the manual sofa backrest horizontal forward and backward push-pull structure described in the above embodiment, comprising the following steps:

[0104] S1: Push the slider 2 to move toward the terminal, so that the creeping gear 4 moves to the far end of the long groove 12;

[0105] S2: Push the slider 2 to move toward the starting end, so that the creeping gear 4 moves to the proximal end of the long groove 12, so that the control component 7 releases the rotation restriction on the creeping gear 4;

[0106] S3: Push the slider 2 to move to the terminal, and the switching component 6 releases the restriction on the unidirectional movement of the slider 2;

[0107] S4: Push the slider 2 to move to the starting end and enable the switching component 6 to start limiting the unidirectional movement of the slider 2.

[0108] The present application also discloses a sofa, which includes a seat body 82, a backrest 81 and the manual sofa backrest horizontal forward and backward push-pull structure described in the above embodiment, the manual sofa backrest horizontal forward and backward push-pull structure is installed in the seat body 82, the backrest 81 is slidably connected to the seat body 82, and the slider 2 is connected to the backrest 81 and is used to drive the backrest 81 to move. In this embodiment, a dorsal fin 83 is fixedly connected to the connecting plate 3, and the dorsal fin 83 is fixedly connected to the backrest 81. The seat body 82 is provided with an avoidance groove 821 for giving way to the dorsal fin 83.

[0109] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A manual sofa backrest horizontal push-pull structure, It is characterized in that include: A slide bar (1), one end of which is a starting end and the other end of which is a terminal end, the slide bar (1) being provided with a plurality of tooth grooves (11) spaced apart along the axial direction, and the tooth groove (11) located in the middle has at least one long groove (12) extending along the axial direction of the slide bar (1); A sliding block (2) is slidably arranged on the sliding bar (1) along the axis direction of the sliding bar (1); A creeping gear (4) is rotatably mounted on the slider (2) and meshes with the tooth groove (11), and when the slider (2) slides forward from the starting end to the end end, it can drive the creeping gear (4) to rotate; A one-way moving component (5) is movably mounted on the slider (2) and has a locking position for limiting the one-way rotation of the creeping gear (4) and an unlocking position for releasing the restriction; A switching component (6) is movably mounted on the slider (2) and is used to switch the one-way movable component (5) between a locked position and an unlocked position when the switching component (6) moves; as well as A control component (7) is connected to the slider (2) and has a first state and a second state. When the slider (2) moves forward, the one-way moving component (5) is located in a locked position, and the control component (7) is in the first state, which is used to limit the crawling gear (4) from moving forward to the end of the long groove (12) close to the terminal end of the slide bar (1); when the slider (2) drives the control component (7) to move to abut against the seat body (82) and the crawling gear (4) moves back and forth in the long groove (12), the control component (7) switches to the second state, releases the rotation restriction on the crawling gear (4), and the crawling gear (4) can continue to rotate forward to bypass the long groove (12); When the creeping gear (4) bypasses the long groove (12), the switching component (6) moves, causing the one-way moving component (5) to switch to an unlocked position; when the slider (2) moves to the starting end, the switching component (6) moves, causing the one-way moving component (5) to switch from the unlocked position to the locked position.

2. A manual sofa backrest horizontal forward and backward push-pull structure according to claim 1, It is characterized in that The one-way moving component (5) comprises a locking gear (51) and a locking claw (52), wherein the locking gear (51) is fixedly connected to the creeping gear (4), and the locking claw (52) is movably connected to the slider (2) and can mesh with the locking gear (51); When the slider (2) moves toward the terminal end of the slide bar (1), the creeping gear (4) can drive the locking claw (52) away from the locking gear (51); when the slider (2) moves toward the starting end of the slide bar (1), the creeping gear (4) can drive the locking claw (52) to move to mesh with the locking gear (51); The switching component (6) is used to limit the movement of the locking claw (52) when it is in the unlocked position, so that the one-way moving component (5) is maintained in the unlocked position.

3. The manual sofa backrest horizontal forward and backward push-pull structure according to claim 2, It is characterized in that The one-way moving assembly (5) further comprises a driving member (53), wherein the driving member (53) comprises an end cover (531), wherein the end cover (531) is rotatably connected to the creeper gear (4), and the creeper gear (4) can drive the end cover (531) to rotate; The end cover (531) is provided with a waist-shaped hole (5311), the locking claw (52) is fixedly connected with a connecting rod (521), and the connecting rod (521) is inserted into the waist-shaped hole (5311) and can slide in the waist-shaped hole (5311); The slide block (2) is provided with a slide groove (24), the locking claw (52) is fixedly connected with a slide shaft (522), and the slide shaft (522) is inserted into the slide groove (24) and can slide in the slide groove (24).

4. According to claim 3, a manual sofa backrest horizontal forward and backward push and pull structure, It is characterized in that The slider (2) is fixedly connected to a rotating shaft (25); the creeper gear (4) and the end cover (531) are both rotatably sleeved on the rotating shaft (25); a limiting protrusion (26) is fixedly connected to the rotating shaft (25); the end cover (531) is arranged between the limiting protrusion (26) and the creeper gear (4); the driving member (53) further comprises a damping member (532); the damping member (532) is arranged between the limiting protrusion (26) and the end cover (531) and is used to increase the friction between the end cover (531) and the creeper gear (4).

5. According to claim 3, a manual sofa backrest horizontal forward and backward push and pull structure, It is characterized in that The switching assembly (6) comprises a locking rod (61) and an escape opening (62) formed on the locking rod (61); When the locking rod (61) abuts against the locking claw (52), the sliding shaft (522) abuts against the inner wall of one end of the sliding groove (24), so that the one-way moving component (5) is in an unlocked state and the movement of the locking claw (52) is restricted; When the locking claw (52) corresponds to the position of the avoidance opening (62), the position limitation of the locking claw (52) is released.

6. The manual sofa backrest horizontal forward and backward push-pull structure according to claim 1, It is characterized in that The control assembly (7) comprises a drive plate (72), a mounting plate (71) and a rotating block (73); the mounting plate (71) is fixedly connected to the slider (2); the drive plate (72) is provided with an L-shaped through slot and is slidably mounted on the mounting plate (71) along the axis of the slide bar (1); the rotating block (73) is rotatably connected to the mounting plate (71) and is located in the through slot; the drive plate (72) is provided with a protrusion that matches the rotating block (73); When the driving plate (72) initially slides backward relative to the mounting plate (71), the protrusion cooperates with the rotating block (73) to restrict the movement of the mounting plate (71); when the driving plate (72) first moves forward and then slides backward relative to the mounting plate (71) again, the protrusion releases the restriction on the movement of the mounting plate (71); An elastic member (74) is provided between the mounting plate (71) and the driving plate (72); one end of the elastic member (74) acts on the driving plate (72), and the other end of the elastic member (74) acts on the mounting plate (71).

7. The manual sofa backrest horizontal forward and backward push-pull structure according to claim 6, It is characterized in that The protrusion comprises a first protrusion (723) and a second protrusion (724) which are arranged opposite to each other at the corner of the through groove; two symmetrical end surfaces of the rotating block (73) are both provided with notches, and the first protrusion (723) and the second protrusion (724) are both adapted to the notches; When the creeping gear (4) moves forward in the long groove (12) for the first time, the driving plate (72) slides relative to the mounting plate (71) and causes the first protrusion (723) to be inserted into the corresponding notch, causing the rotating block (73) to rotate; When the creeping gear (4) slides again from the proximal end of the long slot (12) to the distal end of the long slot (12), the first protrusion (723) abuts against the side wall of the rotating block (73) and can push the rotating block (73) to insert into the rear end of the through slot.

8. The manual sofa backrest horizontal push-pull structure according to claim 1, It is characterized in that There are a plurality of slide bars (1), the plurality of slide bars (1) are arranged parallel to each other and a slider (2) is slidably arranged on each slide bar (1), a connecting plate (3) is arranged between adjacent sliders (2), and the connecting plates (3) are respectively fixedly connected to adjacent sliders (2).

9. A sofa, It is characterized in that The invention comprises a manual sofa backrest horizontal forward and backward push-pull structure according to any one of claims 1 to 8, a seat body (82) and a backrest (81), wherein the manual sofa backrest horizontal forward and backward push-pull structure is installed in the seat body (82), the backrest (81) is slidably connected to the seat body (82), and the slider (2) is connected to the backrest (81) and can drive the backrest (81) to move.

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