CN223286834U

CN223286834U - Seat back supporting structure

Info

Publication number: CN223286834U
Application number: CN202422995249.2U
Authority: CN
Inventors: 李东东
Original assignee: Bazhou Xinben Furniture Co ltd
Current assignee: Bazhou Xinben Furniture Co ltd
Priority date: 2024-12-05
Filing date: 2024-12-05
Publication date: 2025-09-02
Anticipated expiration: 2034-12-05

Abstract

The utility model discloses a seat back support structure, comprising a base, a first support column fixedly connected to one end of the top surface of the base, a second support column detachably connected to the top end of the first support column, a drive assembly connected to the second support column, the drive assembly being used to drive the second support column to move vertically toward or away from the first support column; a backrest fixing frame fixedly connected to the top end of the second support column for fixing the backrest; a lumbar support fixing frame for fixing and mounting a lumbar support is slidably connected to the outer wall of the first support column; an adjustment assembly is provided on one side outer wall of the first support column, the adjustment assembly being fixedly connected to the lumbar support fixing frame. The utility model can adjust the height of the backrest and lumbar support to meet the needs of different users, improving applicability and comfort.

Description

Seat back supporting structure

Technical Field

The utility model relates to the technical field of seats, in particular to a seat back supporting structure.

Background

Office chairs are seating articles for a person to sit on to perform various tasks and are generally composed of a seat cushion, a backrest support structure, armrests, and a bottom support structure. The cushion is in direct contact with the user to provide comfortable sitting feeling, and the backrest provides support for the back of the user to reduce back pressure. The armrests are used for supporting arms of a user. The bottom support structure is the framework of the seat and is responsible for carrying the weight of the entire seat and the user. The main function of the backrest support structure is to provide a firm support for the backrest, ensuring that the backrest can bear the weight of the user and maintain a stable posture.

Existing back support structures and backrests are generally designed as a single unit by placing a back-up filler of sponge, memory cotton, latex or mesh, etc. on a support frame and cutting and sewing to fit the contours of the back rest. However, this design, while ensuring comfort and support of the backrest, has significant drawbacks in terms of flexibility. In particular, the height of the backrest cannot be adjusted, meaning that it cannot perfectly adapt to the user requirements of different heights, body shapes or sitting postures, thus limiting the universality and optimization of user experience. For example, the utility model patent with the publication number of CN219895147U discloses an office chair backrest support angle adjusting structure, which achieves the aim of adjusting the backrest support angle, can adjust the backrest to play a good role in supporting lumbar vertebra no matter the user works and learns or relaxes when sitting on a table, is more effective in releasing pressure, and can be used in afternoon nap.

However, the above patent solutions do not solve the problem that the backrest height is not adjustable. For users with large height differences, the optimal supporting effect cannot be obtained only by angle adjustment. In addition, the height position of the lumbar support in the patent cannot be adjusted, and the applicability is poor.

Accordingly, there is a need to develop a seat back support structure that addresses the above-described deficiencies.

Disclosure of utility model

The utility model aims to provide a seat back supporting structure which can adjust the heights of a backrest and a lumbar support so as to meet the requirements of different users and improve the applicability and the comfort level.

In order to solve the technical problems, the utility model adopts the following technical scheme:

The utility model discloses a seat backrest supporting structure, which comprises a base, wherein one end of the top surface of the base is fixedly connected with a first supporting column, the top end of the first supporting column is detachably connected with a second supporting column, the second supporting column is connected with a driving assembly, the driving assembly is used for driving the second supporting column to move close to or away from the first supporting column in the vertical direction, the top end of the second supporting column is fixedly connected with a backrest fixing frame used for being fixedly connected with a backrest, the outer wall of the first supporting column is slidably connected with a lumbar support fixing frame used for fixedly installing a lumbar support, and the outer wall of one side of the first supporting column is provided with an adjusting assembly which is fixedly connected with the lumbar support fixing frame.

Further, sliding holes are formed in the two ends of the top surface of the first support column along the length direction of the first support column, reinforcing plates which are correspondingly matched with the sliding holes are fixedly connected to the two ends of the bottom surface of the second support column, and the two reinforcing plates are respectively and slidably connected to the two sliding holes.

Further, the drive assembly comprises a threaded rod and a threaded cylinder, a mounting hole is formed in the middle of the top surface of the first support column in a penetrating mode, one end of the threaded cylinder is fixedly connected to the bottom surface of the second support column, the other end of the threaded cylinder is slidably connected to the mounting hole, one end of the threaded rod is in threaded connection to the threaded cylinder, and the other end of the threaded rod penetrates through the base and is in rotary connection with the base.

Further, one end of the threaded rod penetrates through the base and is fixedly connected with a knob.

Further, the adjusting assembly comprises a shell, a rack, a gear and a driving unit, wherein the shell is fixedly connected with the lumbar support fixing frame, the rack is vertically and fixedly connected to the outer wall of the first support column, the inner wall of the shell is rotationally connected with a rotating shaft, the gear is fixedly connected with the rotating shaft, the gear is meshed with the rack, and the driving unit is in transmission connection with the gear and is used for driving the gear to rotate.

Further, the driving unit comprises a worm and a worm wheel, the worm is rotationally connected to the inner wall of the shell, the worm wheel is fixedly connected to the rotating shaft, and the worm wheel are in meshed transmission.

Further, one end of the worm penetrates through the shell and is fixedly connected with a rocker.

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

According to the utility model, the first support column and the second support column are detachably connected, and the second support column is driven to move in the vertical direction through the driving assembly, so that the height of the second support column is changed, and the height of the backrest fixing frame is changed. Simultaneously, lean on mount sliding connection on first support column through the waist, lean on the height of mount through adjusting part regulation waist to can adjust the height that back and waist leaned on, in order to be applicable to different user's demand, promote the suitability and the comfort level of seat.

Drawings

The utility model is further described with reference to the following description of the drawings.

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic perspective view of the first support column and the second support column of the present utility model when separated;

fig. 3 is a schematic perspective view of another view of the present utility model.

The reference numerals comprise 1, a base, 2, a first support column, 3, a second support column, 4, a driving component, 401, a threaded rod, 402, a threaded cylinder, 5, a backrest fixing frame, 6, a lumbar support fixing frame, 7, an adjusting component, 701, a shell, 702, a rack, 703, a gear, 704, a rotating shaft, 705, a worm, 706, a worm wheel, 707, a rocker, 8, a sliding hole, 9, a reinforcing plate, 10 and a knob.

Detailed Description

The utility model provides a seat back supporting structure, which can adjust the heights of a back and a waist rest so as to meet the requirements of different users and improve the applicability and the comfort level.

The following description of the embodiments of the present utility model will be made in detail with reference to the accompanying drawings, wherein it is apparent that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In a specific embodiment, as shown in fig. 1-3, the lumbar support comprises a base 1, one end of the top surface of the base 1 is fixedly connected with a first support column 2, the top end of the first support column 2 is detachably connected with a second support column 3, the second support column 3 is connected with a driving component 4, the driving component 4 is used for driving the second support column 3 to move close to or far away from the first support column 2 in the vertical direction, the top end of the second support column 3 is fixedly connected with a backrest fixing frame 5 used for being fixedly connected with a backrest, the outer wall of the first support column 2 is slidably connected with a lumbar support fixing frame 6 used for being fixedly connected with a lumbar support, the outer wall of one side of the first support column 2 is provided with an adjusting component 7, and the adjusting component 7 is fixedly connected with the lumbar support fixing frame 6.

Through the detachable connection between the first support column 2 and the second support column 3 to drive the second support column 3 through drive assembly 4 and remove in vertical direction, thereby change the height of second support column 3, and then change the height of back mount 5. Simultaneously, through waist rest mount 6 sliding connection on first support column 2, through the height of adjusting part 7 regulation waist rest mount 6 to can adjust the height of back and waist rest, with the demand that is applicable to different users, promote the suitability and the comfort level of seat.

In a specific embodiment, the two ends of the top surface of the first support column 2 are provided with slide holes 8 along the length direction thereof, the two ends of the bottom surface of the second support column 3 are fixedly connected with reinforcing plates 9 correspondingly adapted to the slide holes 8, so that the connection strength between the first support column 2 and the second support column 3 can be enhanced, and the two reinforcing plates 9 are respectively and slidably connected in the two slide holes 8, so as to slide in the slide holes 8 along with the movement of the first support column 2.

Specifically, the driving assembly 4 comprises a threaded rod 401 and a threaded cylinder 402, a mounting hole is formed in the middle of the top surface of the first support column 2 in a penetrating mode, one end of the threaded cylinder 402 is fixedly connected to the bottom surface of the second support column 3, the other end of the threaded cylinder 402 is slidably connected in the mounting hole, one end of the threaded rod 401 is in threaded connection with the threaded cylinder 402, and the other end of the threaded rod 401 penetrates through the base 1 and is in rotary connection with the base 1.

The threaded rod 401 is rotated to drive the threaded cylinder 402 to slide in the mounting hole, so that the second support column 3 fixedly connected with the threaded cylinder 402 is driven to be close to or far away from the first support column 2.

Specifically, one end of the threaded rod 401 penetrates the base 1 and is fixedly connected with the knob 10. The threaded rod 401 is conveniently rotated manually to adjust the height of the backrest.

In a specific embodiment, the adjusting assembly 7 comprises a housing 701, a rack 702, a gear 703 and a driving unit, wherein the housing 701 is fixedly connected with the lumbar support fixing frame 6, the rack 702 is vertically and fixedly connected to the outer wall of the first support column 2, a rotating shaft 704 is rotatably connected to the inner wall of the housing 701, the gear 703 is fixedly connected with the rotating shaft 704, the gear 703 is meshed with the rack 702, and the driving unit is in transmission connection with the gear 703 and is used for driving the gear 703 to rotate.

Specifically, the driving unit includes a worm 705 and a worm wheel 706, the worm 705 is rotatably connected to the inner wall of the housing 701, the worm wheel 706 is fixedly connected to the rotating shaft 704, and the worm 705 and the worm wheel 706 are in meshed transmission.

The worm 705 is rotated to drive the worm wheel 706 to rotate, and further drive the rotating shaft 704 to rotate, so as to drive the gear 703 to rotate, and under the action of the rack 702 meshed with the gear 703, drive the housing 701 and the lumbar support fixing frame 6 to slide up and down on the outer wall of the first support column 2, so that the adjustment of the lumbar support height is realized.

Specifically, the worm 705 has one end penetrating the housing 701 and fixedly connected to the rocker 707. Facilitating manual rotation of the worm 705 for lumbar adjustment.

The operating principle of the present utility model is that when the present utility model is used and a user needs to adjust the height of the seat back, the knob 10 is rotated. The knob 10 is fixedly connected with the threaded rod 401, so that the knob 10 drives the threaded rod 401 to rotate. The threaded rod 401 is in threaded connection with the threaded cylinder 402, and when the threaded rod 401 is rotated, the threaded cylinder 402 moves in a vertical direction along the threaded rod 401. The screw cylinder 402 is fixedly connected to the bottom surface of the second support column 3, so that the second support column 3 moves in the vertical direction toward or away from the first support column 2 as the screw cylinder 402 moves. The backrest fixing frame 5 at the top end of the second support column 3 moves along with the second support column, so that the seat backrest is driven to ascend or descend, and the height adjustment is realized.

When the user needs to adjust the lumbar support position, the rocker 707 is fixedly connected with the worm 705 by rotating the rocker 707, so that rotating the rocker 707 drives the worm 705 to rotate. Rotation of the worm 705 drives rotation of the gear 703 through a worm gear. Since the gear 703 is engaged with the rack 702, the rotation of the gear 703 is converted into the movement of the lumbar support bracket 6 along the rack 702. The movement of the lumbar support fixing frame 6 drives the lumbar to be supported on the first support column 2 to change, thereby realizing the adjustment of the lumbar support position.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.

The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.

Claims

1. A seat backrest supporting structure is characterized by comprising a base (1), wherein one end of the top surface of the base (1) is fixedly connected with a first supporting column (2), the top end of the first supporting column (2) is detachably connected with a second supporting column (3), the second supporting column (3) is connected with a driving assembly (4), the driving assembly (4) is used for driving the second supporting column (3) to move close to or far away from the first supporting column (2) in the vertical direction, the top end of the second supporting column (3) is fixedly connected with a backrest fixing frame (5) for fixedly connecting a backrest, the outer wall of the first supporting column (2) is slidably connected with a lumbar support fixing frame (6) for fixedly installing a lumbar backrest, one side outer wall of the first supporting column (2) is provided with an adjusting assembly (7), and the adjusting assembly (7) is fixedly connected with the lumbar support fixing frame (6).

2. The seat back supporting structure according to claim 1, wherein sliding holes (8) are formed in two ends of the top surface of the first supporting column (2) along the length direction of the first supporting column, reinforcing plates (9) correspondingly matched with the sliding holes (8) are fixedly connected to two ends of the bottom surface of the second supporting column (3), and the two reinforcing plates (9) are respectively and slidably connected to the two sliding holes (8).

3. The seat back supporting structure according to claim 2, wherein the driving assembly (4) comprises a threaded rod (401) and a threaded cylinder (402), a mounting hole is formed in the middle of the top surface of the first supporting column (2) in a penetrating mode, one end of the threaded cylinder (402) is fixedly connected to the bottom surface of the second supporting column (3), the other end of the threaded cylinder (402) is slidably connected to the mounting hole, one end of the threaded rod (401) is in threaded connection to the threaded cylinder (402), and the other end of the threaded rod (401) penetrates through the base (1) and is in rotary connection with the base (1).

4. The seat back support structure of claim 3, wherein one end of the threaded rod (401) penetrates through the base (1) and is fixedly connected with a knob (10).

5. The seat back support structure of claim 1, wherein the adjusting assembly (7) comprises a housing (701), a rack (702), a gear (703) and a driving unit, the housing (701) is fixedly connected with the lumbar support fixing frame (6), the rack (702) is vertically and fixedly connected to the outer wall of the first support column (2), a rotating shaft (704) is rotatably connected to the inner wall of the housing (701), the gear (703) is fixedly connected with the rotating shaft (704), the gear (703) is meshed with the rack (702), and the driving unit is in transmission connection with the gear (703) and is used for driving the gear (703) to rotate.

6. The seat back support structure of claim 5, wherein said drive unit comprises a worm (705) and a worm wheel (706), said worm (705) being rotatably coupled to an inner wall of said housing (701), said worm wheel (706) being fixedly coupled to said shaft (704), said worm (705) and said worm wheel (706) being in meshed engagement.

7. The seat back support structure of claim 6, wherein one end of the worm (705) penetrates the housing (701) and is fixedly connected with a rocker (707).