CN220694837U - Waist holds in palm adjusting bracket and seat thereof - Google Patents

Abstract

The utility model belongs to the field of office furniture, and particularly relates to a waist support adjusting bracket and a seat thereof. The utility model can adjust the height and the angle of the waist support according to different groups of users or different sitting postures, thereby solving the problems of the spine and the lumbar vertebra caused by sitting for a long time and providing better use experience for consumers.

Description

Waist holds in palm adjusting bracket and seat thereof

Technical Field

The utility model belongs to the field of office furniture, and particularly relates to a waist support adjusting bracket and a seat thereof.

Background

Along with the continuous improvement of the living standard of people, the daily working and learning pressures are also larger and larger, so sub-health is always a close concern of people, and the damage to the spine and the cervical vertebra and the damage to the waist are not very small due to the long-time sitting. As is well known, the spine of a human body is S-shaped, the chair backs of common chairs on the market are mostly flat up and down, people often use the chair backs with comfortable sitting postures, as the waist is not sufficiently supported, pressure or damage can be brought to the waist in the long term, and many people can use an external waist pad device to relieve the pain, but the waist support still cannot reach an ideal state when the sitting postures are changed.

Based on the above problems, the applicant proposes a lumbar support adjusting bracket and a seat thereof.

Disclosure of Invention

In order to make up for the defects of the prior art, the utility model provides a waist support adjusting bracket and a technical scheme of a seat thereof.

A waist support adjusting bracket comprises a backrest connecting piece, a waist support connecting piece, an adjusting arm component and a locking mechanism; the backrest connecting piece is used for being connected with a backrest, the waist support connecting piece is used for installing a waist support, the locking mechanism comprises an operation piece, a transmission assembly and rotating shaft assemblies, the two rotating shaft assemblies are divided into a first rotating shaft assembly and a second rotating shaft assembly, the left end of the adjusting arm assembly is rotationally connected with the backrest connecting piece through the first rotating shaft assembly, the right end of the adjusting arm assembly is rotationally connected with the waist support connecting piece through the second rotating shaft assembly, the first rotating shaft assembly and the second rotating shaft assembly can slide back and forth relative to the adjusting arm assembly, the backrest connecting piece is configured to be unable to rotate relative to the first rotating shaft assembly, and the waist support connecting piece is configured to be unable to rotate relative to the second rotating shaft assembly;

the two rotating shaft assemblies are both used for being in locking fit with the adjusting arm assemblies, the control piece is used for driving the transmission assembly to move, and the transmission assembly is used for driving the two rotating shaft assemblies to slide, so that the two rotating shaft assemblies are unlocked from being in locking fit with the adjusting arm assemblies, and the waist support can be adjusted in position and angle along with the waist support connecting piece.

Further, the transmission assembly comprises a sliding part, a first lever and a second lever, the sliding part is connected to the adjusting arm assembly in a front-back sliding mode and is connected with the control part, the middle part of the first lever is rotationally connected with the adjusting arm assembly, two ends of the first lever are rotationally connected with the first rotating shaft assembly and the sliding part respectively, the middle part of the second lever is rotationally connected with the adjusting arm assembly, and two ends of the second lever are rotationally connected with the second rotating shaft assembly and the sliding part respectively.

Further, the control is a wire control handle with an elastic reset function.

Further, a first locking matching part is arranged on the first rotating shaft assembly, and a third locking matching part used for locking matching with the first locking matching part is arranged on the adjusting arm assembly; the second rotating shaft assembly is provided with a second locking matching part, and the adjusting arm assembly is provided with a fourth locking matching part which is used for locking and matching with the second locking matching part.

Further, the first locking matching part and the third locking matching part realize locking matching through a spline tooth structure; the second locking matching part and the fourth locking matching part realize locking matching through a spline tooth structure.

Further, the rotating shaft assembly comprises a locking shaft and a guide rod, wherein the locking shaft and the guide rod are arranged front and back, the locking shaft is used for being in locking fit with the adjusting arm assembly, and the guide rod is connected with the transmission assembly and used for driving the locking shaft to slide.

Further, the locking mechanism comprises a first elastic piece and a second elastic piece, wherein the first elastic piece is connected between the first rotating shaft assembly and the backrest connecting piece and used for resetting the first rotating shaft assembly after unlocking, and the second elastic piece is connected between the second rotating shaft assembly and the waist support connecting piece and used for resetting the second rotating shaft assembly after unlocking.

Further, the backrest connecting piece and the adjusting arm assembly are both rotatably sleeved on the first rotating shaft assembly, so that the backrest connecting piece and the adjusting arm assembly are rotatably connected, the backrest connecting piece and the adjusting arm assembly are buckled in the axial direction of the first rotating shaft assembly, so that the backrest connecting piece and the adjusting arm assembly cannot move relatively in the axial direction, and a first accommodating cavity for being in sliding fit with the first rotating shaft assembly in the axial direction is formed between the backrest connecting piece and the adjusting arm assembly; the waist holds in palm connecting piece and adjusting arm subassembly all rotate and cup joint on second pivot subassembly to this realizes that waist holds in the palm connecting piece and adjusting arm subassembly's rotation is connected, and both lock mutually in the axial of second pivot subassembly, makes both unable emergence relative motion in the axial, and waist holds in the palm forming between connecting piece and the adjusting arm subassembly and be used for with second pivot subassembly in axial sliding fit's second accommodation chamber.

Further, the adjusting arm assembly comprises an adjusting arm and a fixed cover plate arranged on the adjusting arm assembly, and an inner cavity for accommodating the transmission assembly is formed between the adjusting arm and the fixed cover plate; the two ends of the backrest connecting piece are respectively provided with a first shaft sleeve which is used for being sleeved with the first rotating shaft assembly in a rotating way, and the first shaft sleeve at least one end is detachably connected with the backrest connecting piece; the two ends of the waist support connecting piece are respectively provided with a second sleeve which is used for being sleeved with the second rotating shaft assembly in a rotating mode, and the second sleeves at least one end of the waist support connecting piece are detachably connected with the waist support connecting piece.

The utility model also provides a seat, and the backrest of the seat is connected with the waist support through the waist support adjusting bracket.

Compared with the prior art, the utility model has the beneficial effects that:

1) The utility model ensures that the height and the angle of the waist support can be adjusted according to different groups of use or different sitting postures, thereby solving the problems of the spine and the lumbar vertebra caused by sitting for a long time and providing better use experience for consumers;

2) The utility model has simple structure, reasonable design and convenient operation.

Drawings

FIG. 1 is a schematic diagram of an exploded construction of the present utility model;

FIG. 2 is a schematic diagram of the structure of the present utility model

FIG. 3 is an exploded view of the locking mechanism of the present utility model;

FIG. 4 is a schematic cross-sectional view of the present utility model;

FIG. 5 is a schematic view of the structure of the adjusting arm and the first locking shaft according to the present utility model;

FIG. 6 is a second schematic diagram of the structure of the present utility model.

In the figure: the backrest connecting piece 1, the first shaft sleeve 2, the first guide rod 3, the first locking shaft 4, the first locking matching part 400, the first elastic piece 5, the adjusting arm 6, the third locking matching part 600, the fixed cover plate 7, the sliding piece 8, the first lever 9, the pressing plate 10, the wire control handle 11, the waist support connecting piece 12, the self-tapping screw 13, the second lever 14, the second guide rod 15, the second elastic piece 16, the second shaft sleeve 17, the second locking shaft 18 and the second locking matching part 1800.

Detailed Description

In the description of the present utility model, it should be understood that the terms "one end," "the other end," "the outer side," "the upper," "the inner side," "the horizontal," "coaxial," "the center," "the end," "the length," "the outer end," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

The utility model is further described below with reference to the accompanying drawings.

Referring to fig. 1-6, a lumbar support adjusting bracket includes a backrest connecting member 1, a lumbar support connecting member 12, an adjusting arm assembly and a locking mechanism. The backrest connecting piece 1 is used for being connected with the backrest, the waist holds in the palm connecting piece 12 and is used for installing the waist and holds in the palm, locking mechanical system includes operating piece, drive assembly and pivot subassembly, pivot subassembly has two, divide into first pivot subassembly and second pivot subassembly, adjust arm subassembly left end and rotate with backrest connecting piece 1 through first pivot subassembly and be connected, adjust arm subassembly right-hand member and support connecting piece 12 through the second pivot subassembly and rotate, first pivot subassembly and second pivot subassembly can slide around adjusting arm subassembly relatively, backrest connecting piece 1 is configured to unable rotate relative first pivot subassembly, waist holds in the palm connecting piece 12 and is configured to unable rotate relative second pivot subassembly.

The two rotating shaft assemblies are both used for being locked and matched with the adjusting arm assemblies, the control piece is used for driving the transmission assembly to move, the transmission assembly is used for driving the two rotating shaft assemblies to slide, the locking and matching of the two rotating shaft assemblies and the adjusting arm assemblies are released, and the waist support can be adjusted in position and angle along with the waist support connecting piece 12.

With continued reference to fig. 1 and 2, the backrest connecting piece 1 and the adjusting arm assembly are both rotatably sleeved on the first rotating shaft assembly, so that the backrest connecting piece 1 and the adjusting arm assembly are rotatably connected, and are buckled in the axial direction of the first rotating shaft assembly, so that the backrest connecting piece 1 and the adjusting arm assembly cannot move relatively in the axial direction, and a first accommodating cavity for sliding fit with the first rotating shaft assembly in the axial direction is formed between the backrest connecting piece 1 and the adjusting arm assembly. The waist holds in the palm connecting piece 12 and adjusts the arm subassembly and all rotate and cup joint on the second pivot subassembly to this realizes that waist holds in the palm connecting piece 12 and adjusts the rotation of arm subassembly and connects, and both lock mutually in the axial of second pivot subassembly, makes both unable emergence relative motion in the axial, and waist holds in the palm forming between connecting piece 12 and the adjusting the arm subassembly and be used for with second pivot subassembly in axial sliding fit's second accommodation chamber.

Further, the adjusting arm assembly comprises an adjusting arm 6 and a fixed cover plate 7 arranged on the adjusting arm assembly, and an inner cavity for accommodating the transmission assembly is formed between the adjusting arm 6 and the fixed cover plate. The two ends of the backrest connecting piece 1 are respectively provided with a first shaft sleeve 2 which is used for being sleeved with the first rotating shaft assembly in a rotating mode, the first shaft sleeve 2 at one end of the backrest connecting piece 1 is integrally formed with the backrest connecting piece 1, and the first shaft sleeve 2 at the other end of the backrest connecting piece 1 is matched with the backrest connecting piece in a plug-in mode. The two ends of the waist support connecting piece 12 are respectively provided with a second shaft sleeve 17 which is used for being sleeved with the second rotating shaft assembly in a rotating way, wherein the second shaft sleeve 17 at one end is integrally formed with the waist support connecting piece 12, and the second shaft sleeve 17 at the other end is in inserted and clamped fit with the waist support connecting piece 12.

With continued reference to fig. 3, the transmission assembly includes a sliding member 8, a first lever 9 and a second lever 14, the sliding member 8 is slidably connected to the adjusting arm 6 back and forth, and is connected to the control member, the first lever 9 and the second lever 14 are located at the left and right sides of the sliding member 8, a portion of the middle part of the first lever 9 near the sliding member 8 is rotationally connected to the adjusting arm 6, one end of the first lever 9 is rotationally connected to the sliding member 8, the other end is connected to the first rotating shaft assembly, a portion of the middle part of the second lever 14 near the sliding member 8 is rotationally connected to the adjusting arm 6, one end of the second lever 14 is rotationally connected to the sliding member 8, and the other end is connected to the second rotating shaft assembly.

With continued reference to fig. 3, the first rotating shaft assembly includes a first locking shaft 4 and a first guide rod 3, which are disposed front and back, the first locking shaft 4 is in plug-in fit, the first locking shaft 4 is used for locking fit with the adjusting arm 6, a groove is formed in the middle of the first guide rod 3, an end portion of the first lever 9 is inserted into the groove, when the first lever 9 rotates, the first lever 9 can be pushed to slide by the end portion, and the first guide rod 3 pushes the first locking shaft 4 to slide. The second rotating shaft assembly comprises a second locking shaft 18 and a second guide rod 15 which are arranged front and back, the second locking shaft 18 is in plug-in fit, the second locking shaft 18 is used for being in locking fit with the adjusting arm 6, a groove is formed in the middle of the second guide rod 15, the end portion of the second lever 14 is inserted into the groove, when the second lever 14 rotates, the second guide rod 15 can be pushed to slide through the end portion, and the second guide rod 15 pushes the second locking shaft 18 to slide.

Continuing to refer to fig. 5, a first locking matching part 400 is arranged on the first locking shaft 4, a third locking matching part 600 for locking matching with the first locking matching part 400 is arranged on the adjusting arm 6, the first locking matching part 400 and the third locking matching part 600 realize locking matching through a spline tooth structure, and the spline tooth structure allows axial sliding. The second rotating shaft assembly is provided with a second locking matching part 1800, the adjusting arm 6 is provided with a fourth locking matching part which is used for locking matching with the second locking matching part 1800, the second locking matching part 1800 and the fourth locking matching part realize locking matching through a spline tooth structure, and the spline tooth structure allows axial sliding.

With continued reference to fig. 3, the control member is a wire control handle 11, the wire control handle 11 is a technology in the art, and is matched with a spring, and after the handle pulls out the pull rope, the pull rope can automatically reset under the action of the spring.

Further, the locking mechanism further comprises a first elastic piece 5 and a second elastic piece 16, wherein the first elastic piece 5 is connected between the first rotating shaft assembly and the backrest connecting piece 1 and used for resetting the first rotating shaft assembly after unlocking, and the second elastic piece 16 is connected between the second rotating shaft assembly and the waist support connecting piece 12 and used for resetting the second rotating shaft assembly after unlocking. The first elastic member 5 and the second elastic member 16 are preferably compression springs.

The utility model adopts the meshing principle between the locking shaft 4 and the internal spline teeth of the adjusting arm 6 to complete the adjustment of different positions of the waist support. In the utility model, the drive-by-wire handle 11 is operated to drive the sliding part 8 to slide towards the pull wire, the two levers contacted with the drive-by-wire handle 8 are driven to rotate around the rotating shaft, the rotating shaft assembly slides towards the opposite direction and is separated from the spline teeth in the adjusting arm 6, the height and the angle of the waist support can be changed at the moment, when the waist support is required to be locked at a certain position, the drive-by-wire handle 11 is released, and the locking shaft can be reset under the action force of the pressure spring to complete locking.

The waist support connecting piece 12 is engaged with the spline teeth of the adjusting arm 6 through a second locking shaft 18, and can be adjusted by 20 degrees in front and back under the action force of the second lever 14 and the second guide rod 15, and when the adjusting arm 6 is lifted at a certain angle, the angle between the adjusting arm and the waist support connecting piece 12 can be adjusted.

As shown in fig. 1 and 2, during installation, the guide rods and the locking shafts sequentially penetrate into corresponding holes at the upper end and the lower end of the adjusting arm 6, the pressure springs are installed inside the locking shafts, the backrest connecting piece 1 and the waist support connecting piece 12 are sequentially sleeved into corresponding notches of the two locking shafts, the two shaft sleeves are aligned with the corresponding guide rods and slide into clamping grooves of the backrest connecting piece 1 and the waist support connecting piece 12 along the clamping grooves respectively, and the two shaft sleeves are fixed firmly by self-tapping screws 13. The wire control handle 11, the stay wire and the sliding piece 8 are assembled and then are arranged in the limiting groove of the adjusting arm 6, the end parts of the two levers are arranged in the groove holes of the corresponding guide rods, and the other end of the lever is arranged with the sliding piece 8. Finally, the fixed cover plate 7 is installed.

As shown in fig. 3, 4 and 5, the motion principle of the utility model is shown. Fig. 3 is a schematic view of the mechanism control, fig. 4 is a partial sectional view, and fig. 5 is a schematic view of the principle of engagement of the lock shaft with the adjustment arm. The sliding part 8 slides towards the stressed direction under the action of the wire control handle 11, the lever connected with the sliding part toggles the corresponding guide rod to slide towards the opposite direction to push the corresponding locking shaft to move backwards, at the moment, the pressure spring is stressed and compressed, when the sliding distance of the locking shaft backwards is larger than 10mm, the meshing relationship between the locking shaft and the internal spline teeth of the adjusting arm 6 is in a separated state, at the moment, the adjusting arm 6 and the internal structure thereof can rotate around the axis of the locking shaft by a certain angle, and because the backrest connecting part 1 and the waist support connecting part 12 are internally provided with the guiding groove of the locking shaft, the locking shaft can only slide in the guiding groove and can not rotate along with the rotation of the adjusting arm 6, when the wire control handle 11 is released, the pressure spring forwards pushes the locking shaft to mesh with the internal spline teeth of the adjusting arm 6 to complete locking, as shown in fig. 5, the spline tooth contact part has a certain taper, thereby ensuring that the required moving distance is smaller when the locking shaft is separated from the adjusting arm 6, the mutual meshing process is smoother, the fit clearance can be effectively reduced, the adjacent tooth included angle in the figure is 10 degrees, and therefore the waist support stretching distance can reach the effective adjusting range (0-100 mm) and the locking gear.

As shown in fig. 6, which is a schematic diagram of adjustment of different locking positions of the present utility model, when the adjusting arm 6 is lifted up at a certain angle, the waist support connecting member 12 can be turned backwards within the range of 0-20 ° according to the same control principle, so as to meet the heights and angles of the waist supports in different sitting postures.

A backrest of the chair is connected with a waist support through a waist support adjusting bracket.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The waist support adjusting bracket is characterized by comprising a backrest connecting piece (1), a waist support connecting piece (12), an adjusting arm component and a locking mechanism; the backrest connecting piece (1) is used for being connected with a backrest, the waist support connecting piece (12) is used for installing a waist support, the locking mechanism comprises an operation piece, a transmission assembly and a rotating shaft assembly, the two rotating shaft assemblies are divided into a first rotating shaft assembly and a second rotating shaft assembly, the left end of the adjusting arm assembly is rotationally connected with the backrest connecting piece (1) through the first rotating shaft assembly, the right end of the adjusting arm assembly is rotationally connected with the waist support connecting piece (12) through the second rotating shaft assembly, the first rotating shaft assembly and the second rotating shaft assembly can slide back and forth relative to the adjusting arm assembly, the backrest connecting piece (1) is configured to be unable to rotate relative to the first rotating shaft assembly, and the waist support connecting piece (12) is configured to be unable to rotate relative to the second rotating shaft assembly;

the two rotating shaft assemblies are both used for being in locking fit with the adjusting arm assemblies, the control piece is used for driving the transmission assembly to move, the transmission assembly is used for driving the two rotating shaft assemblies to slide, the locking fit with the adjusting arm assemblies is relieved by the two rotating shaft assemblies, and the waist support can be adjusted in position and angle along with the waist support connecting piece (12).

2. The lumbar support adjusting bracket according to claim 1, wherein the transmission assembly comprises a sliding part (8), a first lever (9) and a second lever (14), the sliding part (8) is connected to the adjusting arm assembly in a front-back sliding manner, and is connected with the control part, the middle part of the first lever (9) is rotationally connected with the adjusting arm assembly, two ends of the first lever are respectively connected with the first rotating shaft assembly and the sliding part (8), the middle part of the second lever (14) is rotationally connected with the adjusting arm assembly, and two ends of the second lever are respectively connected with the second rotating shaft assembly and the sliding part (8).

3. The lumbar support adjustment bracket according to claim 1, wherein the operating member is a wire handle (11) having an elastic return function.

4. The lumbar support adjustment bracket according to claim 1, wherein a first locking engagement portion (400) is provided on the first rotation shaft assembly, and a third locking engagement portion (600) for locking engagement with the first locking engagement portion (400) is provided on the adjustment arm assembly; the second rotating shaft assembly is provided with a second locking matching part (1800), and the adjusting arm assembly is provided with a fourth locking matching part which is used for locking matching with the second locking matching part (1800).

5. The lumbar support adjustment bracket according to claim 4, wherein the first and third locking engagement portions (400, 600) are engaged by a spline tooth arrangement; the second locking engagement portion (1800) and the fourth locking engagement portion achieve locking engagement by a spline tooth structure.

6. The lumbar support adjustment bracket of claim 1 wherein the pivot assembly includes a front-to-back locking shaft for locking engagement with the adjustment arm assembly and a guide bar connected to the drive assembly for sliding movement of the locking shaft.

7. The lumbar support adjustment bracket according to claim 1, wherein the locking mechanism comprises a first elastic member (5) and a second elastic member (16), the first elastic member (5) is connected between the first rotating shaft assembly and the backrest connecting member (1) for realizing the resetting of the first rotating shaft assembly after unlocking, and the second elastic member (16) is connected between the second rotating shaft assembly and the lumbar support connecting member (12) for realizing the resetting of the second rotating shaft assembly after unlocking.

8. The lumbar support adjusting bracket according to claim 1, wherein the backrest connecting piece (1) and the adjusting arm assembly are both rotatably sleeved on the first rotating shaft assembly, so that the backrest connecting piece (1) and the adjusting arm assembly are rotatably connected, the backrest connecting piece (1) and the adjusting arm assembly are buckled with each other in the axial direction of the first rotating shaft assembly, so that the backrest connecting piece (1) and the adjusting arm assembly cannot move relatively in the axial direction, and a first accommodating cavity for being in sliding fit with the first rotating shaft assembly in the axial direction is formed between the backrest connecting piece (1) and the adjusting arm assembly; the waist holds in palm connecting piece (12) and adjusts the arm subassembly and all rotate and cup joint on the second pivot subassembly to this realizes that waist holds in the palm connecting piece (12) and adjusts the rotation of arm subassembly and connects, and both lock mutually in the axial of second pivot subassembly, makes both unable relative motion in the axial, and waist holds in the palm forming between connecting piece (12) and the adjusting the arm subassembly and being used for with second pivot subassembly in axial sliding fit's second accommodation chamber.

9. The lumbar support adjustment bracket according to claim 8, wherein the adjustment arm assembly comprises an adjustment arm (6) and a fixed cover plate (7) arranged on the adjustment arm assembly, and an inner cavity for accommodating the transmission assembly is formed between the adjustment arm and the fixed cover plate; the two ends of the backrest connecting piece (1) are respectively provided with a first shaft sleeve (2) which is used for being rotatably sleeved with the first rotating shaft assembly, and the first shaft sleeve (2) at least one end is detachably connected with the backrest connecting piece (1); the two ends of the waist support connecting piece (12) are respectively provided with a second shaft sleeve (17) which is used for being rotatably sleeved with the second rotating shaft assembly, and the second shaft sleeve (17) at least one end is detachably connected with the waist support connecting piece (12).

10. A seat, wherein the backrest of the seat is connected to a lumbar support by a lumbar support adjustment bracket according to any one of claims 1 to 9.