Waist rest capable of being widened

Abstract

The utility model discloses an expandable waist rest which comprises an installation seat, a left waist support and a right waist support are symmetrically arranged on the front side of the installation seat, a cavity is formed in the installation seat, and a left supporting arm and a right supporting arm which can slide oppositely are arranged in the cavity. One end of the left support arm and one end of the right support arm respectively extend to the outside of the mounting seat and are fixedly connected with the corresponding left waist support and the corresponding right waist support, a linkage piece is arranged in the cavity, and the linkage piece is respectively in meshed connection with the left support arm and the right support arm, so that the left support arm and the right support arm synchronously move in opposite directions under the action of the linkage piece. The left support arm and the right support arm which can slide oppositely are arranged, the length of the left support arm and the length of the right support arm extending out of the mounting seat can be adjusted, and then the distance between the left waist support and the right waist support is adjusted to adapt to users of different body types, and the left support arm and the right support arm synchronously move reversely under the action of the linkage piece by arranging the linkage piece. And the left support arm and the right support arm can be conveniently and quickly adjusted, so that the broadened waist rest has the effect of conveniently broadening.

Description

Technical Field

[0001] This application relates to the field of lumbar support technology, and more particularly to an expandable lumbar support. Background Technology

[0002] With the fast pace of modern life, it's increasingly common for people to maintain a seated posture for extended periods while working, studying, and living. Prolonged sitting not only leads to fatigue in the lower back muscles but can also cause health problems such as lumbar spine disorders. To alleviate this issue, lumbar supports, as a form of auxiliary support, are gradually becoming an important part of people's daily lives.

[0003] A search revealed Chinese patent CN220694835U, which discloses a lumbar support adjustment mechanism. This mechanism allows adjustment of the distance between two lumbar supports to accommodate users of different body types. However, the complex structural design of this lumbar support results in a high price. For ordinary consumers who require lumbar support in mesh chairs to enhance comfort, the price of such products often exceeds their expectations, hindering widespread adoption. Therefore, a lumbar support with an expandable design is proposed to address this issue. Utility Model Content

[0004] The purpose of this invention is to provide an expandable lumbar support to solve the problems mentioned in the background art.

[0005] The embodiments of this application adopt the following technical solutions:

[0006] An expandable lumbar support includes a mounting base. A left lumbar support and a right lumbar support are symmetrically arranged on the front side of the mounting base. A cavity is provided inside the mounting base, and a left support arm and a right support arm that can slide in opposite directions are arranged inside the cavity. One end of the left support arm and the right support arm extend to the outside of the mounting base and are fixedly connected to the corresponding left lumbar support and right lumbar support. A linkage is provided inside the cavity, and the linkage is engaged with the left support arm and the right support arm respectively, so that the left support arm and the right support arm move synchronously in opposite directions under the action of the linkage.

[0007] Preferably, the linkage is a gear, and a support shaft is fixedly connected to the inner wall of the cavity. The gear is coaxially sleeved on the support shaft and can rotate around it.

[0008] Preferably, the left and right support arms are respectively provided with a left rack and a right rack at one end of the arm extending into the cavity. The left rack and the right rack are symmetrically distributed on both sides of the gear and mesh with it to form a transmission pair.

[0009] Preferably, the mounting base includes a front side plate and a rear side plate fixedly connected together by bolts. The inner wall of the front side plate is fixedly connected with a first left limiting groove and a first right limiting groove, respectively. The inner wall of the rear side plate is fixedly connected with a second left limiting groove corresponding to the first left limiting groove, and the inner wall of the rear side plate is fixedly connected with a second right limiting groove corresponding to the first right limiting groove.

[0010] Preferably, one end of the left support arm extending into the cavity is fixedly connected to a left limiting rod that is slidably connected to the first left limiting groove and the second left limiting groove; one end of the right support arm extending into the cavity is fixedly connected to a right limiting rod that is slidably connected to the first right limiting groove and the second right limiting groove; the left rack is fixedly connected to the upper surface of the lower left limiting rod; and the right rack is fixedly connected to the lower surface of the upper right limiting rod.

[0011] Preferably, two stop bars are fixedly connected to the inner wall of the rear side plate, and stop grooves are provided on the front side of both the left and right support arms, with the stop bars passing through the stop grooves.

[0012] Preferably, a left connecting column is fixedly connected to the front side of the left support arm, and the left connecting column is fixedly connected to the left lumbar support; a right connecting column is fixedly connected to the front side of the right support arm, and the right connecting column is fixedly connected to the right lumbar support.

[0013] Preferably, the inner wall of the rear side plate is fixedly connected to a left positioning block and a right positioning block with positioning holes on the front, the back of the left support arm is fixedly connected to a left spring pin, and the back of the right support arm is fixedly connected to a right spring pin.

[0014] The above-described technical solutions adopted in the embodiments of this application can achieve the following beneficial effects:

[0015] In this invention, by setting up left and right support arms that can slide in opposite directions, the length of the left and right support arms extending out of the mounting base can be adjusted, thereby adjusting the distance between the left and right lumbar supports to accommodate users of different body types. By setting up a linkage, the left and right support arms can move synchronously in opposite directions under the action of the linkage, which facilitates quick adjustment of the left and right support arms, thus making the expandable lumbar support have a convenient widening effect. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 Here is one of the three-dimensional structural schematic diagrams of this utility model;

[0018] Figure 2The second is a three-dimensional structural schematic diagram of this utility model;

[0019] Figure 3 Here is an exploded structural diagram of the mounting base of this utility model;

[0020] Figure 4 Here is a three-dimensional structural diagram of the front panel of this utility model;

[0021] Figure 5 Here is a three-dimensional structural diagram of the rear side panel of this utility model;

[0022] Figure 6 Here is an exploded (rear view) structural diagram of the left support arm, right support arm, and gear of this utility model;

[0023] Figure 7 This utility model is: Figure 6 A schematic diagram of the structure from the front view (rear view of the left and right support arms).

[0024] In the diagram: 1. Mounting base; 101. Front side plate; 102. Rear side plate; 2. Left lumbar support; 3. Right lumbar support; 4. Cavity; 5. Left support arm; 6. Right support arm; 7. Gear; 8. Support shaft; 9. Left rack; 10. Right rack; 11. First left limiting groove; 12. First right limiting groove; 13. Second left limiting groove; 14. Second right limiting groove; 15. Left limiting rod; 16. Right limiting rod; 17. Stop rod; 18. Stop groove; 19. Left connecting column; 20. Right connecting column; 21. Limiting block; 22. Left positioning block; 23. Right positioning block; 24. Left spring pin; 25. Right spring pin; 26. Positioning hole. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0027] Please see Figure 1-7 This utility model provides a technical solution for an expandable lumbar support:

[0028] An expandable lumbar support includes a mounting base 1. A left lumbar support 2 and a right lumbar support 3 are symmetrically arranged on the front side of the mounting base 1. A cavity 4 is provided inside the mounting base 1. A left support arm 5 and a right support arm 6 that can slide in opposite directions are arranged inside the cavity 4. One end of the left support arm 5 and the right support arm 6 extends to the outside of the mounting base 1 and is fixedly connected to the corresponding left lumbar support 2 and right lumbar support 3. A linkage is provided inside the cavity 4. The linkage is engaged with the left support arm 5 and the right support arm 6 respectively, so that the left support arm 5 and the right support arm 6 move synchronously in opposite directions under the action of the linkage.

[0029] Specifically, by setting up left support arm 5 and right support arm 6 that can slide in opposite directions, the length of left support arm 5 and right support arm 6 extending out of mounting base 1 can be adjusted, thereby adjusting the distance between left lumbar support 2 and right lumbar support 3 to accommodate users of different body types. By setting up a linkage, left support arm 5 and right support arm 6 can move synchronously in opposite directions under the action of the linkage, which facilitates quick adjustment of left support arm 5 and right support arm 6, thus making the expandable lumbar support have a convenient widening effect.

[0030] The linkage is gear 7. A support shaft 8 is fixedly connected to the inner wall of cavity 4. Gear 7 is coaxially sleeved on support shaft 8 and can rotate around it. The rotation of gear 7 is achieved by setting support shaft 8.

[0031] The left support arm 5 and the right support arm 6 are respectively provided with a left rack 9 and a right rack 10 at one end of the cavity 4. The left rack 9 and the right rack 10 are symmetrically distributed on both sides of the gear 7 and mesh with it to form a transmission pair. By setting the left rack 9 and the right rack 10, the left support arm 5 and the right support arm 6 can move towards each other in cooperation with the gear 7.

[0032] Mounting base 1 includes a front side plate 101 and a rear side plate 102 that are fixedly connected together by bolts. The inner wall of the front side plate 101 is fixedly connected to a first left limiting groove 11 and a first right limiting groove 12, respectively. The inner wall of the rear side plate 102 is fixedly connected to a second left limiting groove 13 corresponding to the first left limiting groove 11, and the inner wall of the rear side plate 102 is fixedly connected to a second right limiting groove 14 corresponding to the first right limiting groove 12.

[0033] One end of the left support arm 5 extending into the cavity 4 is fixedly connected to a left limiting rod 15 that is slidably connected to the first left limiting groove 11 and the second left limiting groove 13. One end of the right support arm 6 extending into the cavity 4 is fixedly connected to a right limiting rod 16 that is slidably connected to the first right limiting groove 12 and the second right limiting groove 14. The left rack 9 is fixedly connected to the upper surface of the lower left limiting rod 15, and the right rack 10 is fixedly connected to the lower surface of the upper right limiting rod 16. The front side plate 101 and the rear side plate 102 are provided to facilitate the assembly of the lumbar support. The ends of the left limiting rod 15 and the right limiting rod 16 are both provided with limiting blocks 21.

[0034] Two stop rods 17 are fixedly connected to the inner wall of the rear side plate 102. Stop grooves 18 are opened on the front side of the left support arm 5 and the right support arm 6. The stop rods 17 pass through the stop grooves 18. By setting the stop rods 17 and the stop grooves 18, the movement range of the left support arm 5 and the right support arm 6 is limited to prevent them from detaching from the mounting base 1.

[0035] The left support arm 5 is fixedly connected to the front of a left connecting column 19, which is fixedly connected to the left lumbar support 2. The right support arm 6 is fixedly connected to the front of a right connecting column 20, which is fixedly connected to the right lumbar support 3.

[0036] The inner wall of the rear side plate 102 is fixedly connected to a left positioning block 22 and a right positioning block 23, which have positioning holes 26 on the front. The back of the left support arm 5 is fixedly connected to a left spring pin 24, and the back of the right support arm 6 is fixedly connected to a right spring pin 25. The left support arm 5 is positioned by the left spring pin 24 cooperating with the left positioning block 22, and the right support arm 6 is positioned by the right spring pin 25 cooperating with the right positioning block 23. The left spring pin 24 and the right spring pin 25 have the same structure and are both existing technologies. They include a cylindrical body and a ball that is restricted to move along the axis of the body. The end of the body has a through hole for the ball to move out. A spring is provided in the body. One end of the spring is connected to the ball, and the other end of the spring is fixedly connected to the inner wall of the body.

[0037] Working principle: During the use of this expandable lumbar support, when it is necessary to adjust the distance between the left lumbar support 2 and the right lumbar support 3, the user pulls the left lumbar support 2 outward or inward. The left lumbar support 2 drives the left support arm 5 to move, the left support arm 5 drives the left rack 9 to move synchronously, the left rack 9 drives the gear 7 to rotate, the gear 7 drives the right rack 10 to move in the opposite direction to the left rack 9, the right rack 10 drives the right support arm 6 to move, and the right support arm 6 drives the right lumbar support 3 to move. This makes the distance between the left lumbar support 2 and the right lumbar support 3 adapt to the user's body shape, facilitating quick adjustment of the left support arm 5 and the right support arm 6, thus enabling the expandable lumbar support to have a convenient widening effect.

[0038] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An expandable lumbar support, comprising a mounting base (1), wherein a left lumbar support (2) and a right lumbar support (3) are symmetrically arranged on the front side of the mounting base (1), characterized in that: The mounting base (1) is provided with a cavity (4), and a left support arm (5) and a right support arm (6) that can slide in opposite directions are provided in the cavity (4). One end of the left support arm (5) and the right support arm (6) extends to the outside of the mounting base (1) and is fixedly connected to the corresponding left waist support (2) and right waist support (3). A linkage is provided in the cavity (4), and the linkage is engaged with the left support arm (5) and the right support arm (6) respectively, so that the left support arm (5) and the right support arm (6) move synchronously in opposite directions under the action of the linkage.

2. The expandable lumbar support according to claim 1, characterized in that: The linkage component is a gear (7), and a support shaft (8) is fixedly connected to the inner wall of the cavity (4). The gear (7) is coaxially sleeved on the support shaft (8) and can rotate around it.

3. The expandable lumbar support according to claim 2, characterized in that: The left support arm (5) and the right support arm (6) are respectively provided with a left rack (9) and a right rack (10) at one end of the cavity (4). The left rack (9) and the right rack (10) are symmetrically distributed on both sides of the gear (7) and mesh with it to form a transmission pair.

4. The expandable lumbar support according to claim 1, characterized in that: The mounting base (1) includes a front side plate (101) and a rear side plate (102) that are fixedly connected together by bolts. The inner wall of the front side plate (101) is fixedly connected to a first left limiting groove (11) and a first right limiting groove (12). The inner wall of the rear side plate (102) is fixedly connected to a second left limiting groove (13) corresponding to the first left limiting groove (11). The inner wall of the rear side plate (102) is fixedly connected to a second right limiting groove (14) corresponding to the first right limiting groove (12).

5. The expandable lumbar support according to claim 3, characterized in that: The left support arm (5) is fixedly connected to a left limiting rod (15) that is slidably connected to the first left limiting groove (11) and the second left limiting groove (13) at one end of the left support arm (5) that extends into the cavity (4). The right support arm (6) is fixedly connected to a right limiting rod (16) that is slidably connected to the first right limiting groove (12) and the second right limiting groove (14) at one end of the right support arm (6) that extends into the cavity (4). The left rack (9) is fixedly connected to the upper surface of the lower left limiting rod (15), and the right rack (10) is fixedly connected to the lower surface of the upper right limiting rod (16).

6. The expandable lumbar support according to claim 4, characterized in that: Two stop bars (17) are fixedly connected to the inner wall of the rear side plate (102). Stop grooves (18) are opened on the front side of the left support arm (5) and the right support arm (6). The stop bars (17) pass through the stop grooves (18).

7. The expandable lumbar support according to claim 1, characterized in that: The left support arm (5) is fixedly connected to the front side of a left connecting column (19), which is fixedly connected to the left waist support (2). The right support arm (6) is fixedly connected to the front side of a right connecting column (20), which is fixedly connected to the right waist support (3).

8. The expandable lumbar support according to claim 4, characterized in that: The inner wall of the rear side plate (102) is fixedly connected to a left positioning block (22) and a right positioning block (23) with a positioning hole (26) on the front. The back of the left support arm (5) is fixedly connected to a left spring pin (24), and the back of the right support arm (6) is fixedly connected to a right spring pin (25).

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