Waist support adjusting mechanism and seat

Abstract

The waist support adjusting mechanism is arranged on a backrest of the seat and comprises a base, a sliding block, a first spring and a locking module, the base is arranged on the backrest and forms a sliding groove opened forwards, the sliding block is arranged in the sliding groove in a sliding mode in the front-back direction, and the front end of the sliding block is suitable for being connected with a waist support; a plurality of locking grooves distributed at intervals in the front-back direction are formed in the outer side face, facing the inner circumferential face of the sliding groove, of the sliding block, the first spring is arranged between the sliding block and the base, the locking module is arranged on the base and located on the outer circumferential side of the sliding block, and the locking module comprises a fixing base, a locking block, a second spring and a control piece. The second spring is arranged between the fixing base and the locking block to push the locking block to move in the direction away from the sliding block, the locking block is provided with a locking protrusion capable of being inserted into the locking groove, the control piece is provided with a matching part located on the side, away from the sliding block, of the locking block, and the matching part can move in the direction close to or away from the locking block. The lumbar support adjusting mechanism is high in safety.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a lumbar support adjustment mechanism and a seat. Background Art

[0002] Chairs are essential to our daily lives. A good chair is more comfortable, fits the body better, and provides more effective support for the back and waist. However, the position of the waist varies among users of different heights and body types, and personal habits vary. Fixed-position lumbar supports are unsuitable for most users. Existing technology typically adds adjustment and locking mechanisms to lumbar supports to adjust and lock the position of the lumbar support. In related technologies, the lumbar support can be moved after the locking mechanism is unlocked, and users can easily cause injury if they accidentally unlock the lumbar support. Therefore, this needs improvement. Utility Model Content

[0003] The utility model provides a lumbar support adjusting mechanism, which has the advantage of high safety.

[0004] The utility model also provides a chair with the lumbar support adjustment mechanism.

[0005] The lumbar support adjustment mechanism according to the first embodiment of the utility model is suitable for being arranged on the backrest of the seat and includes: a base, suitable for being arranged on the backrest and forming a slide groove open forwardly; a slider slidably arranged in the slide groove along the front-rear direction and having a front end suitable for connecting with the lumbar support, the slider having a plurality of locking grooves arranged at intervals along the front-rear direction on the outer side surface of the inner circumference of the slide groove; a first spring provided between the slider and the base; a locking module provided on the base and located on the outer circumference side of the slider, the locking module including a fixed seat, a locking block, a second spring and a control member, the second spring provided between the fixed seat and the locking block for pushing the locking block to move in a direction away from the slider, the locking block having a locking protrusion which can be inserted into the locking groove, the control member having a matching portion located on a side of the locking block away from the slider, the matching portion being movable in a direction toward or away from the locking block.

[0006] According to the lumbar support adjustment mechanism of the first embodiment of the present invention, when the control part is accidentally touched and causes the mating part to move in a direction away from the locking block, the locking protrusion remains inserted into the locking groove to lock the position of the slider, thereby avoiding the locking protrusion from falling out of the locking groove, causing the risk of the lumbar support moving forward under the action of the first spring and impacting the user, thereby improving the reliability and safety of the lumbar support adjustment mechanism.

[0007] According to some embodiments of the present invention, the locking module also includes a limiting matching block provided on the fixed seat, the limiting matching block having a limiting flange located on the side of the locking block away from the slider, and the matching portion is movable in a direction toward or away from the locking block to switch between an unlocked position and a locked position, in the unlocked position, the matching portion is located on the side of the limiting flange away from the locking block, and in the locked position, the matching portion is located between the limiting flange and the locking block and abuts against the limiting flange and the locking block.

[0008] According to some embodiments of the present invention, the locking module also includes a third spring, which is arranged between the fixing seat and the limiting matching block, and the third spring is used to push the limiting matching block to move toward the direction close to the matching part; and / or, a fourth spring is provided on the side of the locking block facing the matching part.

[0009] According to some embodiments of the present invention, the surface where the limiting flange cooperates with the matching portion is a first matching surface, the surface where the matching portion cooperates with the limiting flange is a second matching surface, and both the first matching surface and the second matching surface are smooth curved surfaces; and / or, the matching portion and the limiting flange are in interference contact.

[0010] According to some embodiments of the present invention, the control member is a handle, one end of the control member is located outside the base and the other end is inserted into the base, the middle part of the control member is rotatably connected to the base, and the end of the control member inserted into the base constitutes the mating part.

[0011] According to some embodiments of the present invention, a first mounting groove is formed on the outer surface of the base, and a through hole and a hinge groove connected to the through hole are formed on the inner bottom wall of the first mounting groove, and the hinge groove is located on the outer peripheral side of the through hole, and the hinge groove has a mounting opening open to the outside and a hinge pin is provided in the hinge groove, and the hinge pin is perpendicular to the extension direction of the control component and is passed through the control component, and a fixed pressure block is provided in the first mounting groove, and an avoidance hole opposite to the through hole is formed on the fixed pressure block, and the control component is passed through the through hole and the avoidance hole, and the fixed pressure block is used to close the mounting opening.

[0012] According to some embodiments of the present invention, it also includes: a fastener, a first fixing hole is formed on the inner bottom wall of the first mounting groove, a second fixing hole opposite to the first fixing hole is formed on the fixed pressure block, a third fixing hole opposite to the first fixing hole is formed on the fixing seat, and the fastener is passed through the first fixing hole, the second fixing hole and the third fixing hole.

[0013] According to some embodiments of the present invention, the base includes a base body and a limiting sleeve arranged on the base body, the base body and the limiting sleeve are independently molded, the slide groove is formed on the limiting sleeve, a first limiting structure is formed on the slider, and a second limiting structure is formed on the inner circumferential surface of the slide groove, the second limiting structure is located in front of the first limiting structure and is arranged opposite to the first limiting structure in the front-to-back direction.

[0014] According to some embodiments of the present invention, the limit sleeve includes a plurality of independently formed limit frames, and the plurality of limit frames jointly define the slide groove, and the second limit structure is formed on at least one of the limit frames; and / or a third limit structure is also formed on the slider, and the third limit structure is located on the front side of the second limit structure.

[0015] According to some embodiments of the present invention, the limiting sleeve is snap-connected to the base body.

[0016] According to some embodiments of the present invention, a second mounting groove open to the front is formed on the base body, a limiting card groove is formed on the inner circumference of the second mounting groove, the limiting sleeve is located on the outer circumference of the sliding groove and is formed with a limiting buckle that engages with the limiting card groove, and the limiting card groove extends to the outer surface of the base.

[0017] The chair according to the second embodiment of the present invention includes: a backrest; and the above-mentioned lumbar support adjustment mechanism, wherein the lumbar support adjustment mechanism is slidably provided on the backrest along the up-down direction.

[0018] According to the seat of the embodiment of the second aspect of the present invention, after the locking protrusion is inserted into the locking groove and the matching part is away from the locking block, the first spring can push the slider to make the rear side surface of the locking groove close to the locking protrusion, thereby preventing the locking protrusion from falling out of the locking groove to keep the lumbar support in the current locking position, thereby avoiding the risk of accidentally touching the control part and the locking protrusion falling out of the locking groove, causing the lumbar support to move forward under the action of the first spring and impact the user, thereby improving the reliability and safety of the lumbar support adjustment mechanism. At the same time, the lumbar support adjustment mechanism can drive the lumbar support to move in the up and down directions, thereby adjusting the position of the lumbar support in the up and down directions to meet the needs of different users.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an exploded view of a lumbar support adjustment mechanism according to an embodiment of the present utility model;

[0021] Figure 2is a cross-sectional view of a lumbar support adjustment mechanism according to an embodiment of the present invention, wherein the engaging portion is in an unlocked position;

[0022] Figure 3 is a cross-sectional view of a lumbar support adjustment mechanism according to an embodiment of the present utility model, wherein the engaging portion is in a locked position;

[0023] Figure 4 is a cross-sectional view of the lumbar support adjustment mechanism according to an embodiment of the present invention from another angle;

[0024] Figure 5 is a side view of the base body of the lumbar support adjustment mechanism according to an embodiment of the present utility model;

[0025] Figure 6 is a cross-sectional view of a lumbar support adjustment mechanism according to another embodiment of the present invention, wherein the engaging portion is in an unlocked position;

[0026] Figure 7 This is a partial schematic diagram of a lumbar support adjustment mechanism of a seat mounted to a backrest according to an embodiment of the present invention;

[0027] Figure 8 It is a partial schematic diagram of the lumbar support adjustment mechanism of the seat according to an embodiment of the present utility model being installed to the backrest and the connecting components being installed;

[0028] Figure 9 It is a partial schematic diagram of the lumbar support adjustment mechanism and backrest of a seat connected to the lumbar support according to an embodiment of the present utility model.

[0029] Reference numerals:

[0030] 100. Seat; 10. Lumbar support adjustment mechanism; 1. Base; 11. Base body; 111. First mounting slot; 1111. Through hole; 1112. Hinge slot; 1113. Mounting opening; 1114. First fixing hole; 112. Second mounting slot; 113. Limiting slot; 114. Mounting plate; 115. First cavity; 116. Second cavity; 12. Limiting sleeve; 121. Slide; 122. Second limiting structure; 123. Limiting frame; 123a. First limiting frame; 123b. Second limiting frame; 1231. Connecting protrusion; 124. Limiting buckle; 13. Fixed pressure block; 131, second fixing hole; 132, avoidance hole; 2, slider; 21, locking groove; 22, first limiting structure; 23, third limiting structure; 3, first spring; 41, fixing seat; 411, third fixing hole; 42, locking block; 421, locking protrusion; 43, second spring; 44, control member; 441, matching part; 442, second matching surface; 45, limiting matching block; 451, limiting flange; 452, first matching surface; 46, third spring; 47, fourth spring; 48, matching pressure block; 20, backrest; 30, lumbar support; 40, connecting part. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will appreciate the applicability of other processes and / or the use of other materials.

[0033] The following describes a lumbar support adjustment mechanism 10 according to an embodiment of the first aspect of the present invention with reference to the accompanying drawings.

[0034] like Figures 1-9As shown, according to the lumbar support adjustment mechanism 10 of the embodiment of the present invention, the lumbar support adjustment mechanism 10 is suitable for being arranged on the backrest 20 of the seat 100 and includes: a base 1, a slider 2, a first spring 3 and a locking module. The base 1 is suitable for being arranged on the backrest 20 and is formed with a slide groove 121 open to the front. The slider 2 is slidably arranged in the slide groove 121 along the front and rear directions and the front end is suitable for connecting with the lumbar support 30. The outer surface of the slider 2 facing the inner circumference of the slide groove 121 is formed with a plurality of locking grooves 21 arranged at intervals along the front and rear directions. The first spring 3 is arranged between the slider 2 and the base 1. The locking module is arranged on the base 1 and on the outer peripheral side of the slider 2. The locking module includes a fixed seat 41, a locking block 42, a second spring 43 and a control member 44. The second spring 43 is arranged between the fixed seat 41 and the locking block 42 to push the locking block 42 to move in the direction away from the slider 2. The locking block 42 has a locking protrusion 421 that can be inserted into the locking groove 21. The control member 44 has a matching portion 441 located on the side of the locking block 42 away from the slider 2. The matching portion 441 is movable in the direction toward or away from the locking block 42.

[0035] That is, the first spring 3 has a tendency to push the slider 2 to slide forward relative to the slide slot 121. The user can lean on the lumbar support 30 to apply a thrust to the slider 2 to slide backward and compress the first spring 3, thereby flexibly adjusting the position of the lumbar support 30 in the front-to-back direction. In addition, the second spring 43 has a tendency to push the locking block 42 in a direction away from the slider 2. The user can use the control member 44 to drive the matching portion 441 to move toward the locking block 42 and contact the locking block 42, thereby pushing the locking block 42 toward the slider 2 and finally inserting the locking protrusion 421 into the locking slot 21 to lock the position of the slider 2 in the front-to-back direction, thereby locking the position of the lumbar support 30 to improve the stability of the lumbar support 30 in supporting the human waist. At this time, the lumbar support adjustment mechanism 10 is in a locked state. When it is necessary to unlock the position of the lumbar support 30, the user can use the control member 44 to drive the matching portion 441 to move in the direction away from the locking block 42 to remove the thrust of the matching portion 441 on the locking block 42. However, since the first spring 3 has a tendency to push the slider 2 to slide forward, even if the thrust of the matching portion 441 on the locking block 42 disappears, under the action of the first spring 3, the slider 2 can be pushed to make the rear side of the locking groove 21 close to the locking protrusion 421, thereby preventing the locking protrusion 421 from falling out of the locking groove 21 and keeping the lumbar support 30 in the current locked position.

[0036] In other words, during use of the seat 100, if the control member 44 is accidentally activated, causing the engaging portion 441 to move away from the locking block 42, the locking protrusion 421 remains inserted into the locking groove 21, locking the position of the slider 2. This prevents the locking protrusion 421 from being dislodged from the locking groove 21, which could cause the lumbar support 30 to move forward under the action of the first spring 3 and impact the user, thereby improving the reliability and safety of the lumbar support adjustment mechanism 10. When the user needs to adjust the position of the lumbar support 30, after the control member 44 drives the engaging portion 441 away from the locking block 42, the lumbar support 30 can apply a backward thrust to the slider 2, thereby releasing the thrust of the slider 2 on the locking protrusion 421. The locking protrusion 421 can then be dislodged from the locking groove 21 under the action of the second spring 43, facilitating adjustment of the lumbar support 30 in the fore-aft direction. At this point, the lumbar support adjustment mechanism 10 is in the unlocked state.

[0037] According to the lumbar support adjustment mechanism 10 of the embodiment of the present invention, when the control member 44 is accidentally touched, causing the matching portion 441 to move in a direction away from the locking block 42, the locking protrusion 421 remains inserted into the locking groove 21 to lock the position of the slider 2, thereby avoiding the locking protrusion 421 from falling out of the locking groove 21, causing the risk of the lumbar support 30 moving forward under the action of the first spring 3 and impacting the user, thereby improving the reliability and safety of the lumbar support adjustment mechanism 10.

[0038] In some embodiments, the base 1 is provided with a mounting plate 114, which is located on the outer peripheral side of the slider 2 and is arranged opposite to the locking groove 21. The mounting plate 114 is formed with a first avoidance hole arranged opposite to the locking groove 21. The locking module is fixed on the side of the mounting plate 114 away from the slider 2. A second avoidance hole is formed on the fixing seat 41 for the locking protrusion 421 to pass through. The first avoidance hole is arranged opposite to the second avoidance hole and the locking groove 21. Therefore, the locking protrusion 421 can pass through the second avoidance hole and the first avoidance hole into the locking groove 21.

[0039] In some embodiments, a positioning column is formed on the side of the locking block 42 facing the slider 2, one end of the second spring 43 is sleeved on the positioning column, and the fixing seat 41 is provided with a positioning groove opposite to the positioning block, and the other end of the second spring 43 is placed in the positioning groove. By setting the positioning column and the positioning groove, the installation and positioning of the second spring 43 are facilitated.

[0040] According to some embodiments of the present invention, the locking module also includes a limiting matching block 45 provided on the fixed seat 41, the limiting matching block 45 has a limiting flange 451 located on the side of the locking block 42 away from the slider 2, and the matching portion 441 is movable in a direction toward or away from the locking block 42 to switch between an unlocked position and a locked position. In the unlocked position, the matching portion 441 is located on the side of the limiting flange 451 away from the locking block 42. In the locked position, the matching portion 441 is located between the limiting flange 451 and the locking block 42 and abuts against the limiting flange 451 and the locking block 42.

[0041] That is to say, in the unlocked position, the matching portion 441 is separated from the locking block 42 by the limiting flange 451, and the limiting flange 451 can limit the movement of the matching portion 441 toward the locking block 42, that is, the matching portion 441 can be maintained in the unlocked position by the limiting flange 451; in the locked position, the matching portion 441 is supported between the limiting flange 451 and the locking block 42, and the limiting flange 451 can limit the movement of the matching portion 441 toward the direction away from the locking block 42, that is, the matching portion 441 can be maintained in the locked position, therefore, the limiting flange 451 can better maintain the matching portion 441 in the unlocked position and the locked position, so that the lumbar support 30 can be maintained in the unlocked state and the locked state, and then the position of the lumbar support 30 can be conveniently adjusted while improving the stability of the lumbar support 30 in supporting the human waist.

[0042] Specifically, when it is necessary to lock the lumbar support 30, the user can use the control part 44 to drive the matching part 441 to move from the side of the limiting flange 451 away from the locking block 42 to the side of the limiting flange 451 close to the locking block 42, thereby pushing the locking block 42 to make the locking protrusion 421 insert into the locking groove 21, thereby locking the slider 2 and locking the position of the lumbar support 30; when it is necessary to unlock the lumbar support 30, the user can use the control part 44 to drive the matching part 441 to move from the side of the limiting flange 451 close to the locking block 42 to the side of the limiting flange 451 away from the locking block 42. After the matching part 441 is spaced apart from the locking block 42, the lumbar support 30 applies a backward thrust to the slider 2 to release the thrust of the slider 2 on the locking protrusion 421. The locking protrusion 421 can be disengaged from the locking groove 21 under the action of the second spring 43, thereby adjusting the position of the lumbar support 30 in the front-back direction.

[0043] In some embodiments, the base 1, control member 44, fixing seat 41, locking block 42, and stopper 45 are all made of plastic, which has good elasticity and toughness, is lightweight, and is relatively low in cost. In one specific example, the stopper 45 is made of POM (polyformaldehyde), which provides good wear resistance and improves the service life of the stopper 45.

[0044] In another embodiment, the control member 44 is a metal member, which has high strength and is not easily deformed, thereby improving the reliability of the control member 44 .

[0045] According to some embodiments of the present invention, the locking module further includes a third spring 46, which is disposed between the fixing seat 41 and the limiting mating block 45. The third spring 46 is used to push the limiting mating block 45 toward the mating portion 441. In other words, the third spring 46 has a tendency to push the limiting mating block 45 toward the mating portion 441. When the mating portion 441 switches between the unlocked position and the locked position, the mating portion 441 pushes the limiting mating block 45 to compress the third spring 46 toward the mating portion 441, thereby preventing the mating portion 441 from moving toward or away from the slider 2. This prevents fatigue damage caused by the mating portion 441 and the locking flange deforming to avoid each other, thereby extending the service life of the locking module. In addition, when switched to the unlocked position or the locked position, the limiting mating block 45 can be moved toward the direction close to the mating portion 441 under the push of the third spring 46 to limit the movement of the mating portion 441, so that the mating portion 441 can be maintained in the unlocked position or the locked position, thereby facilitating the adjustment of the position of the lumbar support 30 while improving the stability of the lumbar support 30 in supporting the human waist.

[0046] In some embodiments, a sliding groove is formed on the fixed seat 41, and the third spring 46 and the limiting matching block 45 are arranged in the sliding groove. The limiting matching block 45 can slide in the sliding groove. The locking module also includes a matching pressure block 48, which is fixed to the fixed seat 41 by fasteners. The matching pressure block 48 is used to press the third spring 46 and the limiting matching block 45 into the sliding groove, thereby preventing the limiting matching block 45 and the third spring 46 from falling out of the sliding groove.

[0047] In other embodiments, the limiting fitting block 45 and the fitting pressure block 48 are integrally formed, the fitting pressure block 48 is fixed to the fixing seat 41 via fasteners, and the limiting fitting block 45 is fixed to the fixing seat 41 via the fitting pressure block 48 .

[0048] According to some embodiments of the present invention, a fourth spring 47 is provided on the side of the locking block 42 facing the mating portion 441. Therefore, when the mating portion 441 moves toward the locking block 42 and contacts the fourth spring 47, the fourth spring 47 applies a thrust force to the mating portion 441 away from the locking block 42 to cushion the force of the mating portion 441 moving toward the locking block 42. This reduces the impact force exerted by the mating portion 441 on the locking block 42, thereby preventing damage caused by collision between the mating portion 441 and the locking block 42, and thereby extending the service life of the mating portion 441 and the locking block 42.

[0049] According to some embodiments of the present invention, the surface where the limiting flange 451 and the matching portion 441 mate is a first mating surface 452, and the surface where the matching portion 441 and the limiting flange 451 mate is a second mating surface 442. Both the first mating surface 452 and the second mating surface 442 are smooth curved surfaces. The friction between the two smooth curved surfaces is relatively small. Therefore, by configuring the surfaces where the limiting flange 451 and the matching portion 441 mate with each other as smooth curved surfaces, the friction between the matching portion 441 and the limiting flange 451 during the switching process between the unlocked position and the locked position can be reduced, thereby reducing the resistance of the matching portion 441 to switching between the unlocked position and the locked position. The force required to operate the control member 44 is reduced, and the wear between the limiting flange 451 and the matching portion 441 can be reduced, thereby extending the service life of the limiting flange 451 and the matching portion 441.

[0050] According to some embodiments of the present invention, the mating portion 441 is in interference fit with the limiting flange 451. In other words, the mating portion 441 is in interference fit with the limiting flange 451 in both the unlocked and locked positions, thereby preventing the mating portion 441 from shaking in the unlocked and locked positions, thereby avoiding abnormal noise caused by shaking of the control member 44, and further improving the user experience of the chair 100.

[0051] According to some embodiments of the present invention, the control member 44 is a handle, one end of which is located outside the base 1 and the other end is inserted into the base 1. The middle portion of the control member 44 is rotatably connected to the base 1, and the end of the control member 44 inserted into the base 1 forms a mating portion 441. Therefore, by operating the end of the control member 44 located outside the base 1, the control member 44 can be driven to rotate, thereby driving the mating portion 441 to switch between the unlocked position and the locked position. In other words, it is convenient for the user to operate the control member 44 outside the base 1 to control the mating portion 441 to switch between the locked position and the unlocked position, thereby reducing the difficulty of operating the locking module and facilitating unlocking and locking the position of the lumbar support 30.

[0052] According to some embodiments of the present invention, a first mounting groove 111 is formed on the outer surface of the base 1, and a through hole 1111 and a hinge groove 1112 connected to the through hole 1111 are formed on the inner bottom wall of the first mounting groove 111, and the hinge groove 1112 is located on the outer peripheral side of the through hole 1111, and the hinge groove 1112 has a mounting opening 1113 open to the outside and a hinge pin is provided in the hinge groove 1112, and the hinge pin is perpendicular to the extension direction of the control component 44 and is passed through the control component 44, and a fixed pressure block 13 is provided in the first mounting groove 111, and an avoidance hole 132 opposite to the through hole 1111 is formed on the fixed pressure block 13, and the control component 44 is passed through the through hole 1111 and the avoidance hole 132, and the fixed pressure block 13 is used to close the mounting opening 1113. That is, the control member 44 is rotatable about the central axis of the hinge pin, thereby enabling the control member 44 to be rotatably connected to the base 1 via the hinge pin. The control member 44 can sequentially pass through the avoidance hole 132 and the through-hole 1111 to enter the base 1. At the same time, the fixed pressure block 13 can secure the hinge pin within the hinge groove 1112 by closing the installation opening 1113. The fixed pressure block 13 thus restricts the hinge pin from being dislodged from the base 1, thereby improving the connection stability of the control member 44. Furthermore, the difficulty of installing the hinge pin can be effectively reduced.

[0053] According to some embodiments of the present invention, the lumbar support adjustment mechanism 10 further includes: a fastener, a first fixing hole 1114 is formed on the inner bottom wall of the first mounting groove 111, a second fixing hole 131 is formed on the fixed pressure block 13, and a third fixing hole 411 is formed on the fixed seat 41, and the fastener is passed through the first fixing hole 1114, the second fixing hole 131, and the third fixing hole 411. In other words, the first fixing hole 1114, the second fixing hole 131, and the third fixing hole 411 are opposite to and connected to each other, and the fastener passes through the second fixing hole 131, the first fixing hole 1114, and the third fixing hole 411 in sequence to fix the fixed pressure block 13 and the fixed seat 41 to the base 1, so that only one fastener is required to achieve a fixed connection between the fixed pressure block 13, the base 1, and the fixed seat 41. Therefore, the number of fasteners required for connecting the fixed pressing block 13 and the fixing seat 41 with the base 1 can be saved, thereby reducing the cost of connecting the fixed pressing block 13 and the fixing seat 41 with the base 1.

[0054] In a specific example, the fastener is a threaded fastener, and the first fixing hole 1114, the second fixing hole 131 and the third fixing hole 411 are all provided with internal threads. The fastener can be screwed into the second fixing hole 131 from the side away from the first fixing hole 1114 to achieve the connection between the fixed pressure block 13, the base 1 and the fixing seat 41.

[0055] According to some embodiments of the present invention, the base 1 includes a base body 11 and a limiting sleeve 12 arranged on the base body 11. The base body 11 and the limiting sleeve 12 are independently formed, and a slide groove 121 is formed on the limiting sleeve 12. A first limiting structure 22 is formed on the slider 2, and a second limiting structure 122 is formed on the inner circumferential surface of the slide groove 121. The second limiting structure 122 is located in front of the first limiting structure 22 and is arranged opposite to the first limiting structure 22 in the front-to-back direction. Therefore, the blocking of the first limiting structure 22 by the second limiting structure 122 can better limit the maximum stroke of the slider 2 when sliding forward, thereby preventing the slider 2 from escaping from the slide groove 121, and improving the connection stability of the slider 2. At the same time, by providing a limiting sleeve 12 and a base body 11 that are independently formed, the slider 2 can be first installed in the limiting sleeve 12, and then the combined structure of the limiting sleeve 12 and the slider 2 can be installed in the base body 11. Among them, since the slider 2 and the limiting sleeve 12 are respectively provided with the first limiting structure 22 and the second limiting structure 122, by first combining the slider 2 and the limiting sleeve 12, the difficulty of installing the slider 2 into the slide groove 121 can be reduced, thereby improving the assembly efficiency of the slider 2 and the base 1.

[0056] According to some embodiments of the present invention, the limiting sleeve 12 includes a plurality of independently formed limiting frames 123, which together define a slide groove 121, and at least one limiting frame 123 is formed with a second limiting structure 122. In other words, the plurality of limiting frames 123 can be sequentially installed on the slider 2. Since at least one limiting frame 123 is formed with the second limiting structure 122, the installation method of arranging a plurality of separate limiting frames 123 and combining them with the slider 2 can reduce the difficulty of installing the slider 2 into the limiting sleeve 12 on the basis of providing the first limiting structure 22 and the second limiting structure 122, thereby improving the assembly efficiency of the slider 2 and the limiting sleeve 12.

[0057] According to some embodiments of the present invention, a third limiting structure 23 is further formed on the slider 2, and the third limiting structure 23 is located in front of the second limiting structure 122. In other words, the blocking of the third limiting structure 23 by the second limiting structure 122 can effectively limit the maximum travel of the slider 2 when sliding backward, thereby preventing the slider 2 from directly colliding with the base 1, reducing the risk of collision damage between the slider 2 and the base 1, and further improving the structural reliability of the lumbar support adjustment mechanism 10.

[0058] In some embodiments, the second limiting structure 122 is a limiting protrusion formed on the inner circumferential surface of the slide groove 121, a limiting groove is formed on the slider 2, the second limiting structure 122 is located in the limiting groove, the front end of the limiting groove constitutes the third limiting structure 23, and the rear end of the limiting groove constitutes the first limiting structure 22, thereby simplifying the structures of the first limiting structure 22, the second limiting structure 122 and the third limiting structure 23.

[0059] According to some embodiments of the present invention, the limiting sleeve 12 is connected to the base body 11 by snapping. The snap connection has the advantages of low cost, easy installation, firm connection, and detachability. Therefore, the limiting sleeve 12 and the base body 11 are connected by snapping, which can reduce the difficulty of installing the limiting sleeve 12 and the base body 11. In addition, when parts need to be replaced, the limiting sleeve 12 can be directly removed from the base body 11, thereby facilitating the replacement of parts.

[0060] According to some embodiments of the present invention, a forward-opening second mounting groove 112 is formed on the base body 11, a limiting latch 113 is formed on the inner circumference of the second mounting groove 112, and a limiting buckle 124 is formed on the outer circumference of the slide groove 121 of the limiting sleeve 12 to engage with the limiting buckle 113. The limiting buckle 113 extends to the outer surface of the base 1. In other words, the limiting buckle 124 located in the limiting buckle 113 can be operated from the outside of the base 1, for example, by pushing the limiting buckle 124 to a position away from the limiting buckle 113, thereby releasing the clamping connection between the limiting sleeve 12 and the base body 11, thereby reducing the difficulty of removing the limiting sleeve 12 and facilitating its removal.

[0061] In some embodiments, the lumbar support adjustment mechanism 10 includes a base 1, a slider 2, a first spring 3 and a locking module. The base 1 includes a base body 11 and a limit sleeve 12. A mounting plate 114 is provided in the base body 11. The mounting plate 114 divides the interior of the base body 11 into a first cavity 115 and a second cavity 116. The first cavity 115 is located above the second cavity 116. The locking module is located in the first cavity 115. The locking module includes a fixed seat 41, a locking block 42, a second spring 43 and a control member 44. The fixed seat 41 is fixed above the mounting plate 114. The locking block 42 is movable in the up and down directions. The second spring 43 is located between the fixed seat 41 and the locking block 42. The lower part of the locking block 42 is formed with a locking protrusion 421. The fixed seat 41 A second avoidance hole is formed on the mounting plate 114 and is arranged opposite to the locking protrusion 421 along the up and down direction. The mounting plate 114 is formed with a first avoidance hole and is arranged opposite to the second avoidance hole along the up and down direction. The locking protrusion 421 can pass through the second avoidance hole and the first avoidance hole in sequence to enter the second cavity 116. The limiting matching block 45 is located on the left side of the locking block 42. The limiting flange 451 is formed on the right side of the limiting matching block 45. A third spring 46 is provided on the left side of the limiting matching block 45. The matching pressure block 48 is located above the limiting matching block 45 and the third spring 46. The matching pressure block 48 is fixedly connected to the fixing seat 41. The control member 44 extends in the left and right directions. The matching portion 441 is located in the first cavity 115 and on the right side of the limiting flange 451. The matching portion 441 extends in the left and right directions. The upper portion of the housing 11 is provided with a first stop 123a and a second stop 123b, and the second stop 123b is provided with a second stop 123a and a second stop 123b. An avoidance groove is formed on the upper part of the frame 123b, and the avoidance groove is opposite to the locking protrusion 421 in the up and down direction so that the locking protrusion 421 can pass through. The inner bottom surfaces of the first limit frame 123a and the second limit frame 123b are both provided with a second limit structure 122, and the outer bottom surfaces of the first limit frame 123a and the second limit frame 123b are respectively formed with limit buckles 124 that are engaged with the limit card groove 113. The lower part of the first limit frame 123a is formed with a connecting protrusion 1231 extending in the left and right direction, and the lower part of the second limit frame 123b is formed with a connecting groove arranged opposite to the connecting protrusion 1231 in the left and right direction. The connecting protrusion 1231 is inserted into the connecting groove to prevent the first limit frame 123a and the second limit frame 123b from moving relative to each other in the front and back directions.The slider 2 is arranged in the limiting sleeve 12, and the top surface of the slider 2 is formed with a plurality of locking grooves 21 arranged at intervals along the front-to-back direction. The locking grooves 21 and the locking protrusions 421 are arranged opposite to each other in the up-down direction. The bottom surface of the slider 2 is formed with a limiting groove, and the second limiting structures 122 of the first limiting frame 123a and the second limiting frame 123b are both located in the limiting groove. The front end of the limiting groove constitutes the third limiting structure 23, and the rear end of the limiting groove constitutes the first limiting structure 22. A first mounting post extending in the front-to-back direction is formed on the inner side surface of the base body 11 facing forward, and a mounting groove open to the rear is formed in the slider 2. A second mounting post extending in the front-to-back direction is formed on the inner side surface of the mounting groove facing backward, and the rear end of the first spring 3 is sleeved on the first mounting post, and the front end of the first spring 3 is sleeved on the second mounting post. The base body 11 A first mounting groove 111 is formed on the right side surface, and a through hole 1111 and a hinge groove 1112 communicating with the through hole 1111 are formed on the inner bottom wall of the first mounting groove 111. The through hole 1111 is communicated with the first cavity 115. The hinge groove 1112 has a mounting opening 1113 open outward, and a hinge pin is provided in the hinge groove 1112. The hinge pin extends in the front-back direction and is passed through the control member 44. A fixed pressure block 13 is provided in the first mounting groove 111. The fixed pressure block 13 is arranged opposite to the first mounting groove 111 in the left-right direction. An avoidance hole 132 is formed on the fixed pressure block 13, which is opposite to the through hole 1111 in the left-right direction. The control member 44 is rotatable around the central axis of the hinge pin. Part of the control member 44 passes through the avoidance hole 132 and the through hole 1111 and is located in the base body 11.

[0062] The following describes a seat 100 according to an embodiment of the second aspect of the present invention with reference to the accompanying drawings.

[0063] The seat 100 according to the second embodiment of the present invention includes a backrest 20 and a lumbar support adjustment mechanism 10 . The lumbar support adjustment mechanism 10 is slidably provided on the backrest 20 in the up-down direction.

[0064] According to the seat 100 of the embodiment of the second aspect of the present invention, after the locking protrusion 421 is inserted into the locking groove 21 and the matching part 441 is away from the locking block 42, the first spring 3 can push the slider 2 to make the rear side of the locking groove 21 close to the locking protrusion 421, thereby preventing the locking protrusion 421 from falling out of the locking groove 21 to keep the lumbar support 30 in the current locking position, thereby avoiding the risk of accidentally touching the control part 44 and the locking protrusion 421 falling out of the locking groove 21, causing the lumbar support 30 to move forward under the action of the first spring 3 and impact the user, thereby improving the reliability and safety of the lumbar support adjustment mechanism 10. At the same time, the lumbar support adjustment mechanism 10 can drive the lumbar support 30 to move in the up and down directions, thereby adjusting the position of the lumbar support 30 in the up and down directions to meet the needs of different users.

[0065] In some embodiments, the seat 100 also includes a connecting component 40, the rear end of the connecting component 40 is rotatably connected to the slider 2, and the front end of the connecting component 40 is connected to the lumbar support 30, so that the connecting component 40 can be rotated to adjust the inclination angle of the lumbar support 30, so that the lumbar support 30 can fit the human waist to meet the needs of different customers.

[0066] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0068] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lumbar support adjustment mechanism for a seat, characterized in that: The lumbar support adjustment mechanism is suitable for being arranged on the backrest of the seat and comprises: A base, adapted to be arranged on the backrest and formed with a sliding groove open forward; A slider is slidably disposed in the slide groove along the front-to-back direction and the front end is suitable for connecting with the lumbar support. The slider has a plurality of locking grooves arranged at intervals along the front-to-back direction formed on the outer surface of the inner circumference of the slide groove; a first spring, disposed between the slider and the base; A locking module is provided on the base and located on the outer peripheral side of the slider, the locking module includes a fixed seat, a locking block, a second spring and a control member, the second spring is provided between the fixed seat and the locking block to push the locking block to move in a direction away from the slider, the locking block has a locking protrusion that can be inserted into the locking groove, and the control member has a matching portion located on the side of the locking block away from the slider, and the matching portion is movable in a direction toward or away from the locking block.

2. The lumbar support adjustment mechanism according to claim 1, characterized in that: The locking module also includes a limiting matching block provided on the fixing seat, and the limiting matching block has a limiting flange located on the side of the locking block away from the slider, and the matching portion is movable in a direction toward or away from the locking block to switch between an unlocked position and a locked position. In the unlocked position, the matching portion is located on the side of the limiting flange away from the locking block, and in the locked position, the matching portion is located between the limiting flange and the locking block and abuts against the limiting flange and the locking block.

3. The lumbar support adjustment mechanism according to claim 2, characterized in that: The locking module also includes a third spring, which is arranged between the fixing seat and the limiting matching block, and the third spring is used to push the limiting matching block to move toward the direction close to the matching part; and / or, a fourth spring is provided on the side of the locking block facing the matching part.

4. The lumbar support adjustment mechanism according to claim 2, characterized in that: The surface where the limiting flange cooperates with the matching portion is a first matching surface, and the surface where the matching portion cooperates with the limiting flange is a second matching surface. Both the first matching surface and the second matching surface are smooth curved surfaces; and / or, the matching portion and the limiting flange are in interference contact.

5. The lumbar support adjustment mechanism according to claim 1, characterized in that: The control member is a handle, one end of the control member is located outside the base and the other end is inserted into the base, the middle part of the control member is rotatably connected to the base, and the end of the control member inserted into the base constitutes the matching part.

6. The lumbar support adjustment mechanism according to claim 5, characterized in that: A first mounting groove is formed on the outer surface of the base, and a through hole and a hinge groove connected to the through hole are formed on the inner bottom wall of the first mounting groove, the hinge groove is located on the outer peripheral side of the through hole, the hinge groove has a mounting opening open to the outside and a hinge pin is provided in the hinge groove, the hinge pin is perpendicular to the extension direction of the control component and is passed through the control component, a fixed pressure block is provided in the first mounting groove, an avoidance hole opposite to the through hole is formed on the fixed pressure block, the control component is passed through the through hole and the avoidance hole, and the fixed pressure block is used to close the mounting opening.

7. The lumbar support adjustment mechanism according to claim 6, characterized in that: Also includes: A fastener is provided, wherein a first fixing hole is formed on the inner bottom wall of the first mounting groove, a second fixing hole opposite to the first fixing hole is formed on the fixed pressure block, and a third fixing hole opposite to the first fixing hole is formed on the fixing seat, and the fastener is passed through the first fixing hole, the second fixing hole and the third fixing hole.

8. The lumbar support adjustment mechanism according to claim 1, characterized in that: The base includes a base body and a limiting sleeve arranged on the base body. The base body and the limiting sleeve are independently molded. The slide groove is formed on the limiting sleeve. A first limiting structure is formed on the slider. A second limiting structure is formed on the inner circumferential surface of the slide groove. The second limiting structure is located in front of the first limiting structure and is arranged opposite to the first limiting structure in the front-to-back direction.

9. The lumbar support adjustment mechanism according to claim 8, characterized in that: The limiting sleeve includes a plurality of independently formed limiting frames, and the plurality of limiting frames jointly define the slide groove, and the second limiting structure is formed on at least one of the limiting frames; and / or a third limiting structure is also formed on the sliding block, and the third limiting structure is located on the front side of the second limiting structure.

10. The lumbar support adjustment mechanism according to claim 8, characterized in that: The limiting sleeve is connected to the base body by snapping.

11. The lumbar support adjustment mechanism according to claim 10, characterized in that: A second mounting groove open to the front is formed on the base body, a limiting card groove is formed on the inner circumference of the second mounting groove, and the limiting sleeve is located on the outer circumference of the slide groove and is formed with a limiting buckle that engages with the limiting card groove, and the limiting card groove extends to the outer surface of the base.

12. A seat, characterized in that: include: Backrest; According to any one of claims 1 to 11, the lumbar support adjustment mechanism is slidably provided on the backrest in an up-down direction.

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