Adjusting assembly, backrest adjusting mechanism and seat

Abstract

The invention relates to the technical field of furniture accessories, in particular to an adjusting assembly, a backrest adjusting mechanism and a seat, and is characterized in that the adjusting assembly comprises a clamping rail with one-way clamping teeth; the clamping module moves along the clamping track, movable clamping teeth are arranged on the clamping module, and the one-way clamping teeth clamp and lock the movable clamping teeth in the first length direction and are used for allowing the movable clamping teeth to be movably clamped to the next one-way clamping teeth in the second length direction; the unlocking component is arranged on the clamping rail and located in the second length direction, and when the clamping module abuts against the unlocking component, the movable clamping teeth and the one-way clamping teeth are mutually loosened so that the clamping module can move in the first length direction; the reset component is arranged on the clamping rail and located in the first length direction, and when the clamping module makes contact with the reset component, the movable clamping teeth and the one-way clamping teeth are clamped and matched again so that the clamping module can be locked and adjusted again, and the adjusting scheme is compact in size, easy to assemble and convenient to adjust.

Description

Technical Field

[0001] The invention relates to the technical field of furniture accessories, and in particular to an adjustment component, a backrest adjustment mechanism and a seat. Background Art

[0002] As users’ demands for furniture functions continue to increase, more and more furniture products now have adjustable functionality. Among them, adjustable furniture refers to furniture that can be adjusted or changed in design according to user needs. This type of furniture provides greater comfort and flexibility by adjusting the angle, height, position or shape of certain parts. It is commonly found in office environments, home living spaces, and medical facilities, and has a relatively broad range of application scenarios.

[0003] For example, the Chinese invention patent with the announcement number CN111195024A discloses an office chair backrest height adjustment device, which includes a seat plate, a back plate, a threaded rod, two sets of fixed plates, a fixed shaft and a transmission shaft. Among them, in this scheme, the threaded rod is mainly driven by a motor to rotate, and the height of the back plate is adjusted under the action of the threaded rod. However, in the above scheme, there are problems such as the overall size of the adjustment structure is large and the assembly is difficult, resulting in the seat not meeting the requirements of lightweight design.

[0004] Furthermore, the Chinese invention patent with the announcement number CN212394427U discloses a seat back support structure, which includes a support vertical tube, a back support bracket and a lever adjustment structure. Among them, a back height adjustment hole for adjusting the back height is provided on the support vertical tube, and the angle is locked by operating the lever adjustment structure, thereby realizing the height adjustment function. However, in the above scheme, there is a problem that the adjustment structure is difficult to operate. Each adjustment requires the lever adjustment structure to be operated separately, and it also requires multiple adjustments to insert the lever adjustment structure into the adjustment hole, which makes it difficult to realize the adjustment action conveniently and quickly.

[0005] The prior art still lacks an adjustment solution that is compact, easy to assemble and convenient to adjust, so there is a need to improve the prior art.

[0006] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Summary of the invention

[0007] The present invention provides an adjustment component, a backrest adjustment mechanism and a seat, so as to solve the problems of the adjustment component in the prior art that the volume is not compact enough, the assembly is complicated and the adjustment is inconvenient.

[0008] To achieve the above objectives, in a first aspect, the present invention provides an adjustment component adopting the following technical solution:

[0009] A regulating assembly comprising:

[0010] The clamping track has a plurality of one-way clamping teeth arranged at intervals;

[0011] A clamping module is displaced along the clamping track, and the clamping module is provided with movable latch teeth, and the one-way latch teeth are used to latch the movable latch teeth in a first length direction of the clamping track to lock the clamping module, and are used to allow the movable latch teeth to be movably latched to the next one-way latch teeth in a second length direction opposite to the first length direction, so that the clamping module can be locked and adjusted;

[0012] An unlocking component is arranged on the clamping track and is located in the second length direction. When the clamping module contacts the unlocking component, the movable clamping teeth and the one-way clamping teeth are released from each other, so that the clamping module can move toward the first length direction.

[0013] And a reset component is arranged on the clamping track and located in the first length direction. When the clamping module contacts the reset component, the movable clamping teeth and the one-way clamping teeth are re-engaged to make the clamping module locked and adjusted toward the second length direction again.

[0014] Preferably, the card connection module comprises:

[0015] A housing having a receiving cavity;

[0016] A card block is rotatably disposed on the housing, the card block is located in the accommodating cavity, and the movable card teeth are disposed on a side of the card block close to the opening of the accommodating cavity;

[0017] An elastic member, disposed on the housing and connected to the card block, for applying an elastic force to the card block to swing toward the outside of the housing;

[0018] And a limiting component is respectively connected to the shell and the card block, and is used to make the card block swing back and forth between the inner and outer sides of the accommodating cavity, or to lock the card block in the accommodating cavity.

[0019] Preferably, the block and the housing are relatively displaced in the first length direction and the second length direction;

[0020] The limiting component comprises a rotating shaft arranged on the clamping block, and the peripheral side of the rotating shaft has a limiting convex portion;

[0021] The shell has a mounting hole, which includes a rotating area and a locking area that are interconnected. The rotating area is used for the rotating shaft to rotate with; the locking area is used for the limiting protrusion to be plugged in and fit with, so as to lock the block in the accommodating cavity.

[0022] Preferably, the rotating shaft is detachably arranged on the clamping block.

[0023] Preferably, the card block is provided with an adjustment arm extending to the outside of the accommodating cavity, the card-jointing rail is provided with an avoidance groove for accommodating the adjustment arm, and the unlocking component is an unlocking step, which abuts and cooperates with the adjustment arm so that the limiting protrusion is inserted into the locking area.

[0024] Preferably, the clamping block is provided with an adjustment arm extending to the outside of the accommodating cavity, the clamping rail is provided with an avoidance groove for accommodating the adjustment arm, and the reset component is a reset step, which abuts and cooperates with the adjustment arm to enable the limiting protrusion to be pulled out of the locking area.

[0025] Preferably, the elastic member is a spring sheet, and the clamping block has a first clamping recess and a second clamping recess which are adjacently arranged, one end of the spring sheet is fixedly connected to the shell, and the other end of the spring sheet is movably clamped to the first clamping recess or the second clamping recess.

[0026] In a second aspect, the present invention provides a backrest adjustment mechanism using the following technical solution:

[0027] A backrest adjustment mechanism comprises an adjustment component, a bracket and a backrest body, wherein the clamping track is arranged on the backrest body, and the clamping module is detachably arranged on the bracket.

[0028] Preferably, the bracket has an installation recess, the inner wall of the installation recess has a first limiting boss, and the limiting boss has an avoidance notch; the clamping module has a second limiting boss and a deformation support portion, the second limiting boss passes through the avoidance notch and slides to abut against the back side of the first limiting boss, the deformation support portion abuts and supports the front side of the first limiting boss, and the inner wall of the installation recess abuts and limits the deformation support portion.

[0029] In a third aspect, the present invention provides a seat adopting the following technical solution:

[0030] A seat comprises a backrest adjustment mechanism.

[0031] Compared with the prior art, the present invention has the following beneficial effects: firstly, the two components of the clamping track and the clamping module are used to realize the displacement adjustment action, which has the characteristics of a small number of components and a compact structure. During installation, it is only necessary to install the two components on two carriers respectively to realize the assembly, and the installation method is simple and convenient; on this basis, when it is necessary to adjust the structure, it is only necessary to directly pull the clamping module and the clamping track together for adjustment. Specifically, in the above-mentioned displacement process, on the one hand, the movable clamping teeth and the one-way clamping teeth are movably engaged with each other to realize the basic locking adjustment function; on the other hand, as the displacement action proceeds, the clamping module is respectively abutted and matched with the unlocking component and the resetting component, so that the movable clamping teeth and the one-way clamping teeth can switch with each other in the two states of active engagement or mutual loosening, so as to flexibly realize the displacement adjustment action, the operation is simple, and the adjustment action is quick and convenient.

[0032] The present invention has other features and advantages, which will be apparent from or will be described in detail in the accompanying drawings and the following detailed description incorporated herein, which together serve to explain the specific principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 is a schematic diagram of the structure of the adjustment component provided in the first embodiment of the present invention;

[0035] Figure 2 is a schematic diagram of the assembly relationship of the adjustment component provided in the first embodiment of the present invention;

[0036] Figure 3 is a cross-sectional view of an adjustment assembly provided in Embodiment 1 of the present invention;

[0037] Figure 4 is a structural schematic diagram of a card connection module provided in Embodiment 1 of the present invention;

[0038] Figure 5 is a schematic diagram of the assembly relationship of the card connection module provided in the first embodiment of the present invention;

[0039] Figure 6 is a schematic diagram of the assembly relationship between the clamping block and the elastic member provided in the first embodiment of the present invention;

[0040] Figure 7 is a schematic diagram of the structure of the clamping block provided in the first embodiment of the present invention in a freely rotating state compared to the housing;

[0041] Figure 8 is a schematic diagram of the structure of the card block provided in the first embodiment of the present invention in a state where the card block is locked inside the housing;

[0042] Fig. 9 This is a schematic diagram of the structure of the clamping track provided in the first embodiment of the present invention.

[0043] Fig.10 is a cross-sectional view of the clamping module and the unlocking component provided in the first embodiment of the present invention when they are matched;

[0044] Fig.11 is a cross-sectional view of the clamping module and the reset component provided in the first embodiment of the present invention when they are matched;

[0045] Fig.12 is a structural schematic diagram of a backrest adjustment mechanism provided in Embodiment 2 of the present invention;

[0046] Fig.13 is a schematic diagram of the assembly relationship between the clamping module and the bracket provided in the second embodiment of the present invention;

[0047] Fig.14 It is a structural schematic diagram of the clamping module provided in the second embodiment of the present invention installed behind the bracket.

[0048] Reference numerals:

[0049] 1. Backrest body;

[0050] 2. Bracket; 21. Installation recess; 22. First limiting boss; 23. Avoidance gap;

[0051] 3. Card-joining track; 31. One-way card tooth; 311. Locking plane; 312. Inclined plane; 32. Avoidance groove;

[0052] 4. Card-joining module; 41. movable card teeth; 42. housing; 421. accommodating cavity; 43. card block; 431. first card-joining recess; 432. second card-joining recess; 433. shaft hole; 44. elastic member; 441. fixing section; 442. elastic section; 443. supporting section; 45. limiting component; 451. rotating shaft; 452. limiting convex part; 46. adjusting arm;

[0053] 5. Unlocking component; 6. Resetting component; 7. Mounting hole; 71. Rotation area; 72. Locking area; 8. Second limiting boss; 9. Deformation support part. DETAILED DESCRIPTION

[0054] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In the description of the present invention, it is to be understood that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally disposed component. When a component is considered to be "disposed on" another component, it may be directly disposed on the other component or there may be a centrally disposed component.

[0056] In addition, terms such as "long", "short", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention. They do not indicate or imply that the device or component referred to must have this specific direction or operate with a specific direction structure, and should not be understood as a limitation of the present invention.

[0057] The following is combined with Figure 1-14 The technical solution of the present invention is further illustrated by specific implementation methods.

[0058] Embodiment 1:

[0059] Please refer to Figure 1 An embodiment of the present invention provides an adjustment component, which is mainly used to drive the telescopic adjustment of two different furniture components, and is therefore applicable to different furniture products, such as seats, beds, tables, etc. Its specific application scenarios can be adjusted according to actual conditions. In this embodiment, the adjustment component is mainly used to telescopically adjust the backrest of the seat. It can be understood that the example shown in this embodiment is not regarded as limiting the setting environment of the adjustment component. No matter what installation environment the adjustment component is applied to, it is regarded as falling within its protection scope.

[0060] Specifically, refer to Figure 2 and Figure 3 The adjustment assembly provided in the embodiment of the present invention includes a clamping track 3, a clamping module 4, an unlocking component 5 and a reset component 6. The clamping track 3 is arranged in one of the sliding components of the backrest, and the clamping module 4 is arranged on the other sliding component of the backrest.

[0061] The clamping track 3 is arranged in the shape of a long track, and a plurality of one-way clamping teeth 31 are arranged along the length of the clamping track 3. Usually, the one-way clamping teeth 31 are arranged integrally with the clamping track 3 to ensure that the one-way clamping teeth 31 have good load-bearing capacity. It can be understood that the specific number of the one-way clamping teeth 31 can be adjusted according to actual needs, and no specific limitation is made here.

[0062] The one-way latch tooth 31 is mainly used to provide a one-way latching effect, and its principle is similar to that of a ratchet tooth. For ease of description, this embodiment makes two reference directions in opposite directions along the length direction of the latching track 3, and defines them as a first length direction and a second length direction, respectively; at this time, the one-way latch tooth 31 has a locking plane 311 that is perpendicular to the first length direction and the second length direction (or close to a vertical state, and this embodiment shows a setting state close to a vertical state), and an inclined plane 312 is arranged at an adjacent position of the locking plane 311, and the inclined plane 312 is arranged in an inclined shape compared to the first length direction and the second length direction.

[0063] At the same time, the clamping module 4 moves along the length direction of the clamping track 3, and the clamping module 4 has a movable latch 41. The profile of the movable latch 41 is similar to that of the one-way latch 31, and the movable latch 41 also has a locking plane 311 and an inclined plane 312. The difference between the two in setting is that the locking plane 311 of the movable latch 41 is arranged opposite to the locking plane 311 of the one-way latch 31.

[0064] At this time, on the one hand, the movable latch tooth 41 and the one-way latch tooth 31 can be matched to make the two mesh together. On the other hand, when the two are in the meshing state, if opposite thrusts are applied to the two, the two locking planes 311 will abut against each other, thereby limiting the displacement of the clamping module 4 along the clamping track 3. At this time, the clamping module 4 and the clamping track 3 are in a locked state; if a reverse pulling force is applied to the two, the movable latch tooth 41 will slide into the next movable latch tooth 41 through the inclined plane 312 of the one-way latch tooth 31, thereby enabling the clamping module 4 and the clamping track 3 to be displaced and adjusted with each other. In this state, the clamping module 4 and the clamping track 3 are in an adjustment state.

[0065] In this embodiment, the one-way latch tooth 31 is configured as follows: the one-way latch tooth 31 is used to lock the movable latch tooth 41 in the first length direction of the latching rail 3 so that the latching module 4 is locked, and is used to allow the movable latch tooth 41 to be movably latched to the next one-way latch tooth 31 in the second length direction opposite to the first length direction so that the latching module 4 can be locked and adjusted.

[0066] Further, continue to refer to Figure 2Because the length of the clamping track 3 is limited, and the number of the movable clamping teeth 41 is also limited, in order to enable the clamping track 3 and the clamping module 4 to be repeatedly adjusted, the unlocking component 5 is arranged on the clamping track 3 and is located in the second length direction. When the clamping module 4 contacts the unlocking component 5, the movable clamping teeth 41 and the one-way clamping teeth 31 are loosened from each other, so that the clamping module 4 can be reset and moved toward the first length direction.

[0067] At the same time, the reset component 6 is arranged on the clamping track 3 and is located in the first length direction. When the clamping module 4 contacts the reset component 6, the movable clamping tooth 41 and the one-way clamping tooth 31 are re-engaged to make the clamping module 4 lock and adjust toward the second length direction again, thereby realizing the repeated adjustment function between the clamping track 3 and the clamping module 4.

[0068] In this embodiment, the unlocking component 5 and the resetting component 6 are respectively located at two ends of the clamping track 3, so that the length space of the clamping track 3 can be fully utilized to obtain a longer spacing adjustment range.

[0069] In the above scheme, the two components of the card-jointed track 3 and the card-jointed module 4 are used to realize the displacement adjustment action, the number of components is small, and the structure volume is compact; and during installation, it is only necessary to install the two components on two carriers respectively to realize the assembly, and the installation method is simple and convenient; at the same time, a one-way locking scheme is adopted, and combined with the unlocking component 5 and the reset component 6 arranged at both ends of the card-jointed track 3, the repeated displacement and telescopic adjustment function can be realized by pulling and pulling, the operation is simple, and the adjustment action is quick and convenient.

[0070] Reference Figure 4 and Figure 5 The clamping module 4 includes a housing 42, a clamping block 43, an elastic member 44 and a limiting member 45. The clamping block 43, the elastic member 44 and the limiting member 45 are arranged or connected to the housing 42, and the housing 42 serves to provide an assembly position for each component. In this embodiment, the housing 42 is opposite to the clamping track 3, and the housing 42 is a rectangular housing 42-shaped structure. The housing 42 has a receiving cavity 421, and the receiving cavity 421 is open on the side of the housing 42 facing the clamping track 3.

[0071] The block 43 is rotatably disposed at the housing 42, and the block 43 is located in the accommodating cavity 421. In this embodiment, the limiting component 45 is connected to the housing 42 and the block 43 respectively, and the limiting component 45 is used to make the block 43 swing back and forth between the inner and outer sides of the accommodating cavity 421, or to lock the block 43 in the accommodating cavity 421; at this time, the block 43 is rotatably disposed at the housing 42 through the limiting component 45, and the block 43 has a free end, and the free end of the block 43 can swing back and forth between the inner and outer sides of the accommodating cavity 421, and at the same time, the movable latch 41 is disposed on the side of the block 43 close to the opening of the accommodating cavity 421 and is located at the free end of the block 43.

[0072] Through the above-mentioned structural setting, during the reciprocating rotation of the clamping block 43, the movable clamping tooth 41 can be driven to extend out of the accommodating cavity 421 and movably engage with the one-way clamping tooth 31. At this time, the clamping module 4 and the clamping track 3 can be locked and adjusted with each other; or during the reciprocating rotation of the clamping block 43, the movable clamping tooth 41 can be driven to move into the accommodating cavity 421. At this time, the movable clamping tooth 41 and the one-way clamping tooth 31 are loosened from each other. At this time, the clamping module 4 and the clamping track 3 can be displaced and reset to each other. Therefore, under the action of the limiting component 45, the clamping block 43 has two states: extending out compared to the shell 42 and being received in the shell 42.

[0073] Further, refer to Figure 5 and Figure 6 The elastic member 44 is arranged on the shell 42 and connected to the block 43. The elastic member 44 is used to apply an elastic force to the block 43 to swing toward the outside of the shell 42. At this time, under the action of the elastic member 44, when the movable latch tooth 41 slides to the next one-way latch tooth 31, the elastic member 44 clamps the two together.

[0074] In this embodiment, the elastic member 44 is a spring sheet, and specifically, the spring sheet includes a fixed section 441, an elastic section 442, and a support section 443 connected in sequence. The fixed section 441 is fixedly connected to the housing 42, and the support section 443 is in contact with the block 43. There is an excessive bend between the fixed section 441 and the elastic section 442. When the elastic section 442 is squeezed, the angle between the elastic section 442 and the fixed section 441 will be reduced, and elasticity will be generated under the support of the material.

[0075] Furthermore, because the card block 43 needs to realize the function change by reciprocating swing, in order to enable the spring to continuously and accurately provide elastic force to the card block 43, the card block 43 has a first snap-in recess 431 and a second snap-in recess 432 that are adjacent to each other. At this time, one end of the spring is fixedly connected to the shell 42, and the support section 443 at the other end of the spring is movably snap-in to the first snap-in recess 431 or the second snap-in recess 432.

[0076] Based on the above settings, when the card block 43 swings to the outside of the accommodating cavity 421, the other end of the spring can be clamped in the first clamping recess 431. At this time, the first clamping recess 431 is equivalent to providing positioning support for the spring, so that the structure is not easy to loosen; in addition, when the card block 43 moves to the inside of the accommodating cavity 421, the other end of the spring can be clamped in the second clamping recess 432. At this time, the second clamping recess 432 can also provide positioning support for the spring, so that during the state adjustment process of the card block 43, the spring is not easy to deviate and loosen, and the structure is stable and reliable.

[0077] Optionally, in other embodiments, the elastic member 44 may adopt a spring structure, and any component that can provide stable elastic support should be included in the scope of interpretation of the elastic member 44.

[0078] Further, refer to Figure 5 and Figure 7 In order to achieve two-state adjustment of the block 43 in the housing 42, the block 43 and the housing 42 are relatively displaced in the first length direction and the second length direction. On this basis, the limiting component 45 includes a rotating shaft 451 arranged on the block 43, and the two ends of the rotating shaft 451 respectively pass through the opposite sides of the block 43. At the same time, the peripheral side of the rotating shaft 451 has a limiting protrusion 452. Usually, the limiting protrusion 452 is integrally connected with the rotating shaft 451. In this embodiment, the cross-section of the rotating shaft 451 and the limiting protrusion 452 presents a "comma" profile.

[0079] At the same time, the housing 42 has a mounting hole 7, which includes a rotation area 71 and a locking area 72 that are interconnected. In this embodiment, the mounting hole 7 is equivalent to overlapping the dot parts of two commas and rotating the tails of the two commas to be misaligned, one of the comma areas forms the rotation area 71, and the tail of the other comma forms the locking area 72, and the locking area 72 extends along the first length direction, the rotation area 71 is used for the rotation of the shaft 451, which is equivalent to the shaft 451 being able to rotate freely in the rotation area 71, and the block 43 can reciprocate under the support of the elastic member 44 to meet the freedom of movement of the movable latch 41 and the one-way latch 31 during displacement adjustment; and the locking area 72 is used for the limited protrusion 452 to be plugged in and matched, when the limited protrusion 452 is inserted into the locking area 72, the block 43 is locked on the housing 42, and the block 43 is locked on the housing 42, so as to facilitate the subsequent reset action of the clamping module 4 and the clamping track 3.

[0080] In order to more intuitively compare the two states of the block 43, refer to Figure 7 In the first state, the limiting protrusion 452 on the rotating shaft 451 is loosened to the outside of the locking area 72, and the central axis of the rotating shaft 451 is located at point O in the figure; in the second state, Figure 8The limiting protrusion 452 on the rotating shaft 451 is inserted into the locking area 72. At this time, the position of the central axis of the rotating shaft 451 is point P in the figure. According to the accompanying drawings, it can be concluded that a displacement in the first length direction is formed between point O and point P. This displacement space is a prerequisite for the limiting protrusion 452 to be locked to the locking area 72.

[0081] Based on the above configuration, by providing a locking area 72 and a rotation area 71 that are interconnected on the shell 42, the shaft body can be rotated in the rotation area 71 to satisfy the locking adjustment action between the movable latch tooth 41 and the one-way latch tooth 31; on the other hand, by inserting the limiting protrusion 452 into the locking area 72, the clamping block 43 can be rotated into the shell 42, and the movable latch tooth 41 and the one-way latch tooth 31 are kept separated and loosened from each other. At this time, the relative position between the clamping module 4 and the clamping rail 3 can be reset to facilitate re-telescopic adjustment. The overall structure of the above scheme is relatively compact, and the switching action is quick.

[0082] Further, look back Figure 5 The rotating shaft 451 is detachably arranged on the clamping block 43. Specifically, the clamping block 43 is provided with an axial hole 433 running through both sides. The axial hole 433 is consistent with the cross-sectional profile of the rotating shaft 451 and the limiting protrusion 452. At this time, by inserting the rotating shaft 451 with the limiting protrusion 452 into the axial hole 433, detachable installation can be achieved. In the above scheme, the rotating shaft 451 is quickly and conveniently installed, which further simplifies the assembly difficulty of the clamping module 4.

[0083] Further, refer to Figure 8 , in order to realize the unlocking action between the clamping track 3 and the clamping module 4. An adjusting arm 46 is arranged on the side of the clamping block 43 facing away from the housing 42, and the adjusting arm 46 is usually connected to the clamping block 43 in one piece to obtain good connection stability.

[0084] On this basis, refer to Fig. 9 The card-joining track 3 has an avoidance groove 32 for accommodating the adjustment arm 46. In the present embodiment, the avoidance groove 32 is located in the middle of the card-joining track 3 and interrupts the plurality of one-way teeth 31. The avoidance groove 32 extends to both ends of the card-joining track 3 respectively. At this time, the adjustment arm 46 extends to the outside of the accommodating cavity 421 and is accommodated in the avoidance groove 32. The avoidance groove 32 can prevent the card-joining module 4 from causing structural interference to the adjustment arm 46 when it moves.

[0085] Furthermore, combined Fig.10The unlocking component 5 in this embodiment is an unlocking step, which abuts against the adjusting arm 46. At this time, when the adjustment range of the movable latch 41 and the one-way latch 31 is close to the limit, the unlocking step pushes the adjusting arm 46 to move toward the first length direction, so that the limiting protrusion 452 is inserted into the locking area 72. At this time, the block 43 is locked inside the housing 42, and the movable latch 41 and the one-way latch 31 are loosened from each other. At this time, the clamping module 4 can be displaced and reset toward the first length direction.

[0086] Further, in this embodiment, referring to Fig. 9 and Fig.11 The reset component 6 is a reset step, and the reset step is in abutment with the adjustment arm 46. When the clamping module 4 moves to the end of the clamping track 3 in the first length direction, the reset step pushes the limiting protrusion 452 toward the second direction, so that the limiting protrusion 452 is pulled out of the locking area 72. At this time, under the elastic force of the elastic member 44, the clamping block 43 swings to the outside of the housing 42 again, and the one-way clamping tooth 31 is re-movably engaged with the movable clamping tooth 41.

[0087] For ease of description, refer to Fig.10 and Fig.11 When the card module 4 is displaced to point M in the figure, it means that the adjustment arm 46 is in contact with the unlocking step, and at this moment the extended length of the card track 3 is the largest; in addition, when the card module 4 is displaced to point N in the figure, it means that the adjustment arm 46 is in contact with the reset step, and at this moment the extended length of the card track 3 is reset to zero, and then it can be pulled out and adjusted again.

[0088] The implementation principle of this embodiment is as follows: the clamping module 4 starts to perform an adjustment action based on one end of the clamping track 3, and moves toward the other end of the clamping track 3 by pulling the clamping track 3. During this process, the elastic member 44 applies elastic force to the clamping block 43, so that the movable clamping tooth 41 is movably clamped on the one-way clamping tooth 31. The one-way clamping tooth 31 has a one-way limiting function, so that the clamping module 4 can only move along the second length direction of the clamping track 3 and perform locking adjustment.

[0089] Until the clamping module 4 moves to the end of the clamping track 3, the adjusting arm 46 in the clamping module 4 abuts against the unlocking step, and then the limiting protrusion 452 is inserted into the locking area 72, so that the movable clamping tooth 41 and the one-way clamping tooth 31 can remain loosened from each other for a period of time. At this time, the clamping module 4 can move back to the first length direction of the clamping track 3 and return to the initial position because there is no one-way clamping tooth 31 to limit it.

[0090] Until the adjustment arm 46 abuts against the reset step, the limiting protrusion 452 releases the locking area 72, and the block 43 can be reset again under the action of the elastic member 44, and the movable latch tooth 41 and the one-way latch tooth 31 are re-engaged, thus completing a locking adjustment cycle.

[0091] Embodiment 2:

[0092] On the basis of the first embodiment, the features not explained in the present embodiment are explained in the first embodiment and will not be described again. The present embodiment provides a backrest adjustment mechanism, which includes a bracket 2 and a backrest body 1 in addition to the adjustment component in the first embodiment.

[0093] Reference Fig.12 The bracket 2 can be understood as the connecting part between the entire backrest and the seat plate or frame, which is usually fixed on the seat plate or frame; on this basis, the backrest body 1 is slidably set on the bracket 2. In this embodiment, the bracket 2 has a sliding channel, and the backrest body 1 is slidably configured in the sliding channel. At this time, the backrest body 1 can be raised and lowered compared to the bracket 2.

[0094] Furthermore, the clip-on rail 3 is arranged on the backrest body 1 (not shown in the figure). In the present embodiment, the clip-on rail 3 is integrally connected with the backrest body 1. By being integrally formed with the backrest body 1, on the one hand, the structural connection strength is improved, and on the other hand, the assembly workload of the clip-on rail 3 can be reduced, and the subsequent assembly is more efficient.

[0095] At the same time, the card module 4 can be detachably arranged on the bracket 2 to facilitate assembly and maintenance. Fig.13 and Fig.14 The bracket 2 has an installation recess 21. In the present embodiment, the installation recess 21 is in the shape of a rectangular through hole, and the length direction of the installation recess 21 is consistent with the length direction of the clamping track 3. The length of the installation recess 21 is greater than the length of the shell 42, and the installation recess 21 is arranged on one side wall of the bracket 2.

[0096] In addition, a first limiting boss 22 is provided on the inner wall of the mounting recess 21. Usually, the first limiting boss 22 is integrally connected to the bracket 2, and an avoidance notch 23 running through both sides is also provided on the first limiting boss 22; at the same time, a second limiting boss 8 is provided at the clamping module 4. Specifically, the second limiting boss 8 and the deformation support portion 9 are integrally arranged on the outer peripheral surface of the shell 42, and the second limiting boss 8 is arranged opposite to the avoidance notch 23.

[0097] At this time, the second limiting boss 8 can be inserted from the side of the installation recess 21 away from the backrest body 1 and pass through the avoidance gap 23. At this time, the second limiting boss 8 can enter the side of the avoidance gap 23 away from the shell 42, and the shell 42 can also enter the installation recess 21 at the same time; then, push the shell 42 to slide along the second direction, so that the second limiting boss 8 slides and abuts against the back side of the first limiting boss 22. The first limiting boss 22 is equivalent to limiting the second limiting boss 8, so that the shell cannot be pulled out of the installation recess 21.

[0098] On this basis, the clamping module 4 also has a deformable support part 9. In this embodiment, the deformable support part 9 adopts a frame structure, and a hollow structure is provided between one side of the deformable support part 9 and the shell 42. At this time, the deformable support part 9 can be elastically deformed compared with the shell 42. In the process of installing the shell 42 to the installation recess 21, the deformable support part 9 abuts against the outer wall of the bracket 2. At this time, as the pressing force increases, the deformable support part 9 deforms and provides a moving space for the shell 42, so that the deformable support part 9, the shell 42 and the second limiting boss 8 can finally enter the installation recess 21 together.

[0099] Furthermore, after the deformation support part 9 is inserted into the installation recess 21, the deformation support part 9 is loosened from the outer wall of the bracket 2, so that the deformation support part 9 resets itself, and the deformation support part 9 abuts against the front side of the first limiting boss 22; this is equivalent to the deformation support part 9 and the second limiting boss 8 clamping the first limiting boss 22 at the same time to achieve structural fixation.

[0100] In addition, in the present embodiment, the outer peripheral contour size of the deformation support portion 9 is matched with the inner edge size of the mounting recess, so that the inner wall of the mounting recess 21 further abuts against the deformation support portion 9 to limit the position, thereby realizing the assembly of the snap-in module 4. When the snap-in module 4 needs to be disassembled, it is only necessary to re-press the deformation support portion 9 and deform it, and then slide the shell 42 to move the second limiting boss 8 back to the avoidance notch 23 to realize disassembly. The assembly process is simple and does not require the use of tools such as screwdrivers.

[0101] The implementation principle of this embodiment is to adopt a separate module disassembly and assembly solution to make the structural assembly process simple and quick, greatly reducing the difficulty of setting the backrest adjustment mechanism.

[0102] Embodiment three:

[0103] This embodiment discloses a chair, including the backrest adjustment mechanism in the second embodiment, which has the advantages of easy installation and convenient adjustment of the backrest.

[0104] So far, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustment component, characterized in that: include: A clamping track (3) having a plurality of one-way clamping teeth (31) arranged at intervals; A clamping module (4) is displaced along the clamping track (3), and the clamping module (4) is provided with a movable latching tooth (41), and the one-way latching tooth (31) is used to latch the movable latching tooth (41) in a first length direction of the clamping track (3) so as to lock the clamping module (4), and is used to allow the movable latching tooth (41) to be movably latched to the next one-way latching tooth (31) in a second length direction opposite to the first length direction so as to enable the clamping module (4) to be locked and adjusted; An unlocking component (5) is arranged on the clamping track (3) and is located in the second length direction. When the clamping module (4) contacts the unlocking component (5), the movable clamping teeth (41) and the one-way clamping teeth (31) are released from each other, so that the clamping module (4) can move toward the first length direction. and a reset component (6) which is arranged on the clamping track (3) and is located in the first length direction. When the clamping module (4) contacts the reset component (6), the movable clamping teeth (41) and the one-way clamping teeth (31) are re-engaged to enable the clamping module (4) to be locked and adjusted toward the second length direction again.

2. The adjustment assembly according to claim 1, characterized in that The card connection module (4) comprises: A housing (42) having a receiving cavity (421); A clamping block (43) is rotatably disposed on the housing (42), the clamping block (43) is located in the accommodating cavity (421), and the movable clamping tooth (41) is disposed on a side of the clamping block (43) close to the opening of the accommodating cavity (421); An elastic member (44) is disposed on the housing (42) and connected to the clamping block (43), and is used to apply an elastic force to the clamping block (43) to swing toward the outside of the housing (42); and a limiting component (45), respectively connected to the shell (42) and the clamping block (43), and used to make the clamping block (43) swing back and forth between the inner and outer sides of the accommodating cavity (421), or to lock the clamping block (43) in the accommodating cavity (421).

3. The adjustment assembly according to claim 2, characterized in that: The block (43) and the housing (42) are relatively displaceably matched in the first length direction and the second length direction; The limiting component (45) comprises a rotating shaft (451) arranged on the clamping block (43), and a limiting convex portion (452) is provided on the circumference of the rotating shaft (451); The shell (42) has a mounting hole (7), and the mounting hole (7) includes a rotating area (71) and a locking area (72) that are interconnected. The rotating area (71) is used for rotational cooperation with the rotating shaft (451); and the locking area (72) is used for plugging and cooperation with the limiting protrusion (452) to achieve locking of the block (43) in the accommodating cavity (421).

4. The adjustment assembly according to claim 3, characterized in that: The rotating shaft (451) is detachably arranged on the clamping block (43).

5. The adjustment assembly according to claim 3, characterized in that: The clamping block (43) is provided with an adjustment arm (46) extending to the outside of the accommodating cavity (421); the clamping track (3) is provided with an avoidance groove (32) for accommodating the adjustment arm (46); the unlocking component (5) is an unlocking step, and the unlocking step is abutted and matched with the adjustment arm (46) so that the limiting protrusion (452) is inserted into the locking area (72).

6. The adjustment assembly according to claim 3, characterized in that: The clamping block (43) is provided with an adjustment arm (46) extending to the outside of the accommodating cavity (421); the clamping track (3) is provided with an avoidance groove (32) for accommodating the adjustment arm (46); the reset component (6) is a reset step, and the reset step is abutted and matched with the adjustment arm (46) so that the limiting protrusion (452) is pulled out of the locking area (72).

7. The adjustment assembly according to claim 2, characterized in that: The elastic member (44) is a spring sheet, and the clamping block (43) has a first clamping recess (431) and a second clamping recess (432) arranged adjacent to each other, one end of the spring sheet is fixedly connected to the housing (42), and the other end of the spring sheet is movably clamped to the first clamping recess (431) or the second clamping recess (432).

8. A backrest adjustment mechanism, characterized in that: It comprises an adjustment assembly according to any one of claims 1 to 7, and further comprises a bracket (2) and a backrest body (1), wherein the clip-on track (3) is arranged on the backrest body (1), and the clip-on module (4) is detachably arranged on the bracket (2).

9. The backrest adjustment mechanism according to claim 8, characterized in that: The bracket (2) has a mounting recess (21), the inner wall of the mounting recess (21) has a first limiting boss (22), and the limiting boss has an avoidance notch (23); the clamping module (4) has a second limiting boss (8) and a deformation support portion (9), the second limiting boss (8) passes through the avoidance notch (23) and slides to abut against the back side of the first limiting boss (22), the deformation support portion (9) abuts and supports against the front side of the first limiting boss (22), and the inner wall of the mounting recess (21) abuts and limits the deformation support portion (9).

10. A seat, characterized in that: It comprises the backrest adjustment mechanism as claimed in claim 8.

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