Seat lumbar mechanism

Abstract

The utility model relates to daily tool field especially a seat waist adjusting mechanism, including seat frame, the seat frame outer wall is connected with the waist support bottom plate, adjusting mechanism, adjusting mechanism includes adjusting part and driving part, adjusting part includes base, adjusting plate, base is fixedly connected in seat frame outer wall, adjusting plate is fixedly connected in the waist support bottom plate outer wall, and adjusting plate is rotatably connected in base end portion, and the base inside is installed with screw rod, and the screw rod outer wall is swingly connected with adjusting block, and the adjusting block outer wall is rotatably connected with support block, and support block end portion is rotatably connected with adjusting plate, the utility model discloses through adjusting mechanism to make seat frame and waist support bottom plate to the angle of seat frame and waist support bottom plate with more simple adjusting mode carries out the stepless structure adjustment, and this structure is simple and easy to produce, still can keep its stability under high frequency use.

Description

Technical Field

[0001] This utility model relates to the field of everyday tools, and in particular to a seat lumbar adjustment mechanism. Background Technology

[0002] Currently, home chairs with lumbar support are types of seats that can support the user's lower back during use. In today's fast-paced society, many office workers spend most of their time sitting at their desks. Over time, the incidence of diseases caused by prolonged sitting is increasing. Given the lack of time to get up and move around, improving the comfort of chairs is particularly important.

[0003] To accommodate the different sitting habits of users, most seats have adjustment functions, among which the most important is the adjustment of the backrest angle. In existing seats, the backrest angle adjustment is generally achieved by gas spring adjustment, knob adjustment or pull rod adjustment.

[0004] However, the failure rate of the above-mentioned adjustment mechanisms gradually increases with the increase of service life, and their stability is generally poor under high-frequency use. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of this section, the abstract and the title of this utility model. Such simplifications or omissions shall not be used to limit the scope of this utility model.

[0006] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0007] Therefore, the first technical problem to be solved by this utility model is that the failure rate of existing adjustment mechanisms gradually increases with the increase of service life, and their stability is generally poor under high frequency of use.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a seat lumbar adjustment mechanism, including a seat frame, with a lumbar support base plate connected to the outer wall of the seat frame; an adjustment mechanism, the adjustment mechanism including an adjustment component and a driving component, the adjustment component including a base and an adjustment plate, the base being fixedly connected to the outer wall of the seat frame, the adjustment plate being fixedly connected to the outer wall of the lumbar support base plate, the adjustment plate being rotatably connected to the end of the base, a screw being installed inside the base, an adjustment block being movably connected to the outer wall of the screw, a support block being rotatably connected to the outer wall of the adjustment block, and the end of the support block being rotatably connected to the adjustment plate.

[0009] In a preferred embodiment of the seat waist adjustment mechanism of this utility model, a limiting block is provided on the inner wall of the base near the screw, and a limiting groove is provided on the outer wall of the adjusting block. The limiting groove on the outer wall of the adjusting block is engaged and slidably connected with the limiting block on the inner wall of the base.

[0010] In a preferred embodiment of the seat lumbar adjustment mechanism of this utility model, the driving component includes a handwheel box, which is fixedly connected to the outer wall of the seat frame. A handwheel shaft is rotatably connected to the outer wall of the handwheel box. A handwheel shaft bevel gear is fixedly connected to one end of the handwheel shaft inside the handwheel box. Inside the handwheel box, the handwheel shaft bevel gear meshes with a flexible shaft bevel gear. A flexible shaft is fixedly connected to the end of the flexible shaft bevel gear. The flexible shaft is connected to a screw. A handwheel is connected to the other end of the handwheel shaft.

[0011] The beneficial effects of this utility model are: the adjustment mechanism enables stepless adjustment of the angle of the seat frame and lumbar support plate in a simpler way, and the structure is simple and easy to manufacture, and can still maintain its stability under high frequency of use. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0013] Figure 1 A schematic diagram of the overall structure of a seat lumbar adjustment mechanism provided by this utility model;

[0014] Figure 2 A schematic diagram of the adjustment mechanism in a seat lumbar adjustment mechanism provided by this utility model;

[0015] Figure 3 A schematic diagram of the adjustment mechanism in a seat lumbar adjustment mechanism provided by this utility model during adjustment;

[0016] Figure 4 An exploded structural diagram of the adjustment mechanism in a seat lumbar adjustment mechanism provided by this utility model;

[0017] Figure 5 This is a schematic diagram of the internal structure of the drive component in a seat lumbar adjustment mechanism provided by this utility model. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0021] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0022] Example 1

[0023] Reference Figures 1 to 5This embodiment provides a seat lumbar adjustment mechanism, including a seat frame 100, with a lumbar support base plate 200 connected to the outer wall of the seat frame 100; and an adjustment mechanism 300, which includes an adjustment component 301 and a driving component 302. The adjustment component 301 includes a base 301a and an adjustment plate 301b. The base 301a is fixedly connected to the outer wall of the seat frame 100, and the adjustment plate 301b is fixedly connected to the outer wall of the lumbar support base plate 200. The adjustment plate 301b is rotatably connected to the end of the base 301a. A screw 301c is installed inside the base 301a, and an adjustment block 301d is movably connected to the outer wall of the screw 301c. A support block 301e is rotatably connected to the outer wall of the adjustment block 301d, and the end of the support block 301e is rotatably connected to the adjustment plate 301b. When it is necessary to adjust the lumbar position of the seat, the mechanism can adjust the lumbar position of the seat frame 100. When adjusting the backrest angle, the screw 301c can be rotated by the drive component 302. The rotation of the screw 301c drives the adjusting block 301d to move outside the screw 301c. At this time, since the end of the support block 301e is rotatably connected to the adjusting plate 301b, the movement of the adjusting block 301d changes the connection angle between the support block 301e and the adjusting block 301d, so that the adjusting plate 301b can rotate at the connection point with the base 301a. This achieves the purpose of adjusting the angle of the lumbar support plate 200 driven by the adjusting plate 301b. Furthermore, through the cooperation of the screw 301c, the support block 301e of the adjusting block 301d, the base 301a and the adjusting plate 301b can be automatically locked and steplessly adjusted to optimize the adjustment process.

[0024] A limiting block is provided on the inner wall of the base 301a near the screw 301c, and a limiting groove is provided on the outer wall of the adjusting block 301d. The limiting groove on the outer wall of the adjusting block 301d is engaged and slidably connected with the limiting block on the inner wall of the base 301a. This structure is to prevent the adjusting block 301d from rotating outside the screw 301c.

[0025] The drive unit 302 includes a handwheel box 302a, which is fixedly connected to the outer wall of the seat frame 100. A handwheel shaft 302c is rotatably connected to the outer wall of the handwheel box 302a. A handwheel shaft bevel gear 302c-1 is fixedly connected to one end of the handwheel shaft 302c inside the handwheel box 302a. Inside the handwheel box 302a, the handwheel shaft bevel gear 302c-1 meshes with a flexible shaft bevel gear 302d-1. The end of the flexible shaft bevel gear 302d-1 is fixedly connected to... A flexible shaft 302d is connected to a screw 301c, and a handwheel 302b is connected to the other end of the handwheel shaft 302c. When the screw 301c needs to be rotated, the handwheel 302b is rotated, which causes the handwheel shaft 302c to drive the handwheel shaft bevel gear 302c-1 to rotate, and the handwheel shaft bevel gear 302c-1 drives the flexible shaft bevel gear 302d-1 to rotate, thereby realizing the control of the rotation of the screw 301c by the flexible shaft 302d.

[0026] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application.

[0027] For example, an integrally formed element may be composed of multiple parts or elements, the position of the elements may be inverted or otherwise altered, and the nature, number, or position of the discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of this invention. Therefore, this invention is not limited to the particular embodiments but extends to a variety of modifications that still fall within the scope of the appended claims.

[0028] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to the implementation of the present invention) may be omitted.

[0029] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A seat lumbar adjustment mechanism, characterized in that: Includes a seat frame (100), the outer wall of which is connected to a lumbar support base plate (200); An adjustment mechanism (300) includes an adjustment component (301) and a drive component (302). The adjustment component (301) includes a base (301a) and an adjustment plate (301b). The base (301a) is fixedly connected to the outer wall of the seat frame (100). The adjustment plate (301b) is fixedly connected to the outer wall of the lumbar support base plate (200). The adjustment plate (301b) is rotatably connected to the end of the base (301a). A screw (301c) is installed inside the base (301a). An adjustment block (301d) is movably connected to the outer wall of the screw (301c). A support block (301e) is rotatably connected to the outer wall of the adjustment block (301d). The end of the support block (301e) is rotatably connected to the adjustment plate (301b).

2. The seat lumbar adjustment mechanism according to claim 1, characterized in that: A limiting block is provided on the inner wall of the base (301a) near the screw (301c), and a limiting groove is provided on the outer wall of the adjusting block (301d). The limiting groove on the outer wall of the adjusting block (301d) is engaged and slidably connected with the limiting block on the inner wall of the base (301a).

3. A seat lumbar adjustment mechanism according to claim 2, characterized in that: The drive unit (302) includes a handwheel box (302a), which is fixedly connected to the outer wall of the seat frame (100). A handwheel shaft (302c) is rotatably connected to the outer wall of the handwheel box (302a). A handwheel shaft bevel gear (302c-1) is fixedly connected to one end of the handwheel shaft (302c) inside the handwheel box (302a). Inside the handwheel box (302a), the handwheel shaft bevel gear (302c-1) meshes with a flexible shaft bevel gear (302d-1). A flexible shaft (302d) is fixedly connected to the end of the flexible shaft bevel gear (302d-1). The flexible shaft (302d) is connected to a screw (301c). A handwheel (302b) is connected to the other end of the handwheel shaft (302c).

Images