A chair back assembly

Abstract

The utility model discloses a chair back assembly, including support piece, waist rest and motion joint, waist rest is set up on support piece through motion joint, and waist rest can move along many directions, support piece is equipped with first installation groove, and waist rest is equipped with second installation groove, and both ends of motion joint are installed in two grooves respectively, and all have movable space with two grooves, the movable space makes motion joint can move in the groove, makes it at least relative waist rest, support piece each has a movement direction, and then makes waist rest relative support piece at least have two movement directions, and finally realize the multidimensional movement of waist rest, promote the adaptability and use comfort of chair back assembly.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and in particular to a chair back assembly. Background Technology

[0002] In chair back design, multi-dimensional movement functions of lumbar support are gradually becoming a core requirement to adapt to changes in human sitting posture and relieve lumbar pressure. However, existing chair back components with this function mostly rely on complex structures to achieve multi-directional adjustment of the lumbar support: some solutions use multiple sets of motion mechanisms connected in series to control the forward and backward, up and down, or angle adjustment of the lumbar support, resulting in an increase in the overall size of the chair back, complicated assembly processes, and increased production costs.

[0003] Currently, the market lacks a design that can achieve multi-dimensional lumbar support movement through a simple structure. Existing technologies either sacrifice structural simplicity in pursuit of multi-directional adjustment or result in insufficient movement dimensions due to structural simplification. Especially in cost- and space-sensitive scenarios such as office chairs and home lounge chairs, complex multi-dimensional adjustment structures struggle to balance economy and practicality. Therefore, there is an urgent need for a chair back assembly that can achieve multi-directional lumbar support movement through the combination of simple components. Summary of the Invention

[0004] To address the aforementioned technical problems, this utility model provides a chair back assembly, including a support member, a lumbar support, and a motion joint. The lumbar support is movably mounted on the support member via the motion joint and can move in multiple directions. The support member has a first mounting groove, and the lumbar support has a second mounting groove. The two ends of the motion joint are respectively installed in the two grooves, with movable space between them. This movable space allows the motion joint to move within the grooves, giving it at least one direction of movement relative to both the lumbar support and the support member. This allows the lumbar support to have at least two directions of movement relative to the support member, ultimately achieving multi-dimensional movement of the lumbar support and improving the adaptability and comfort of the chair back assembly.

[0005] The technical solution of this utility model is implemented as follows: A chair back assembly includes a support member and a lumbar support. A lumbar support and the support member are provided with a motion joint. The lumbar support is movably mounted on the support member through the motion joint and can move along the support member in multiple directions. The support member is provided with a first mounting groove and the lumbar support is provided with a second mounting groove. The two ends of the motion joint are respectively installed in the first mounting groove and the second mounting groove, and there is a movable space between the motion joint and the first mounting groove and the second mounting groove. The movable space is configured to allow the motion joint to move and cooperate with the support member and the lumbar support respectively.

[0006] The lumbar support achieves its movement relative to the support member through the movement between the lumbar support and the support member via the movement of the joint. Since there is movable space between the joint and the first mounting slot and the second mounting slot, the joint has at least one direction of movement relative to both the lumbar support and the support member. That is, the lumbar support has at least one direction of movement relative to the joint, and the joint has at least one direction of movement relative to the support member, so that the lumbar support has at least two directions of movement relative to the support member, thereby realizing the multi-dimensional movement of the lumbar support.

[0007] Preferably, there are three movable spaces between the joint and the first and second mounting slots. One movable space is located between the joint and either the first or second mounting slot, and the other two movable spaces are located between the joint and the other mounting slot. These three movable spaces are a forward / backward movement space, a vertical movement space, and a rotational movement space. The vertical and rotational movement spaces are formed in the vertical direction of the joint, while the forward / backward movement space is formed in the forward / backward direction. For the vertical movement space, there is space to allow movement in both the vertical and horizontal directions between the joint and the mounting slot. For the rotational movement space, space only needs to be provided above or below, or both vertically. For the forward / backward movement space, space can also be provided only in front of or behind the joint. This allows the user to move forward / backward, vertically, and rotate while resting on the support, allowing for adjustment as needed and improving usability and comfort.

[0008] Preferably, the vertical movement space is located between the motion joint and the second mounting groove. The second mounting groove has several slots along its vertical direction on its wall, and the motion joint has a locking member that engages with the slots. The locking member is an elastic ball.

[0009] Preferably, the front-to-back movement space and the rotational movement space are located between the joint and the first mounting groove. The front-to-back movement space is formed between the joint and the rear inner wall of the first mounting groove, and a spring is provided in the front-to-back movement space. The rotational movement space is formed between the joint and the upper and lower side walls of the first mounting groove. The spring always provides a forward elastic force to the joint so that the backrest moves forward. When the user's waist leans down, the lumbar support can adaptively move backward.

[0010] Preferably, the movable joint is bolted to the support member, the bolt is inserted into the spring, and the bolt is slidably mounted on the support member. After the bolt passes through the support member and the spring, it connects to the movable joint in the front and rear movement space to prevent the movable joint from dislodging from the first mounting slot.

[0011] Preferably, there are two joints, one on each side of the lumbar support. Of course, there can be more or just one joint.

[0012] Preferably, the lumbar support is a frame structure, including vertical bars on the left and right sides, and a second mounting groove is opened on the inner side of the vertical bar with the opening of the second mounting groove facing inward; the support member includes a support seat arranged horizontally on the left and right sides, and a first mounting groove is opened on the support seat with the opening of the first mounting groove facing forward.

[0013] Preferably, the joint is L-shaped.

[0014] Preferably, the lumbar support is a frame structure, including vertical bars on the left and right sides, and a second mounting groove is opened on the outer side of the vertical bar with the opening facing outward; the support member is a frame structure, including uprights on the left and right sides, and a first mounting groove is opened on the inner side of the upright with the opening facing inward.

[0015] Preferably, the support is a back frame. The support can also be a back bracket.

[0016] The design starting point, concept, and beneficial effects of this utility model, which adopts the above technical solution, are as follows: The lumbar support achieves its movement relative to the support member through the movement between the lumbar support and the support member via the movement of the joint. Since there is movable space between the joint and the first mounting slot and the second mounting slot, the joint has at least one direction of movement relative to both the lumbar support and the support member. That is, the lumbar support has at least one direction of movement relative to the joint, and the joint has at least one direction of movement relative to the support member, so that the lumbar support has at least two directions of movement relative to the support member, thereby realizing the multi-dimensional movement of the lumbar support. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the chair back assembly in an embodiment of the present invention; Figure 2 This is a rear view of the chair back assembly in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the chair back assembly in an embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the back frame in an embodiment of the present invention; Figure 5 This is a three-dimensional structural diagram of the lumbar support in an embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the joint in the embodiment of the present invention; Figure 7 This is an exploded view of the chair back assembly in an embodiment of the present invention; Figure 8 This is a front view of the back frame in an embodiment of the present invention.

[0018] The attached figures are labeled as follows: back frame 1; lumbar support 2; motion joint 3; first mounting groove 4; second mounting groove 5; vertical rod 10; upright rod 11; support base 12; slot 13; elastic ball 14; spring 15; clearance hole 17. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] 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. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0021] In the description of this utility model, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] The specific implementation of this utility model is as follows: like Figure 1-8 As shown, this utility model provides a chair back assembly, including a support member and a lumbar support 2. A motion joint 3 is provided between the lumbar support 2 and the support member. The lumbar support 2 is movably mounted on the support member through the motion joint 3, and the lumbar support 2 can move along the support member in multiple directions. The support member is provided with a first mounting groove 4, and the lumbar support 2 is provided with a second mounting groove 5. The two ends of the motion joint 3 are respectively installed in the first mounting groove 4 and the second mounting groove 5, and there is a movable space between the motion joint 3 and the first mounting groove 4 and the second mounting groove 5. The movable space is configured to allow the motion joint 3 to be movably mounted in the first mounting groove 4 and the second mounting groove 5.

[0023] The lumbar support 2 moves relative to the support member through the movement between the lumbar support 2 and the support member via the movement of the motion joint 3. Since there is movable space between the motion joint 3 and the first mounting groove 4 and the second mounting groove 5, the motion joint 3 has at least one direction of movement relative to both the lumbar support 2 and the support member. That is, the lumbar support 2 has at least one direction of movement relative to the motion joint 3, and the motion joint 3 has at least one direction of movement relative to the support member, so that the lumbar support 2 has at least two directions of movement relative to the support member, thereby realizing the multi-dimensional movement of the lumbar support 2.

[0024] Specifically, such as Figure 1 , 2As shown, the lumbar support 2 is used to support the human waist. In addition, there are components to support the human back. The support can be a back bracket, and a backrest or back frame is set on it to support the back. In this embodiment, the support is the back frame 1, and the lumbar support 2 is located in the back frame 1. The lumbar support 2 is also a frame structure. The two frame structures are connected by a motion joint 3. The number of motion joints 3 can be one or more. In this embodiment, there are two motion joints 3, located at the left and right ends of the lumbar support 2 respectively. Correspondingly, there are also two first mounting slots 4 and two second mounting slots 5. Since the lumbar support 2 is a frame structure, it includes vertical rods 10 located on the left and right sides. The second mounting slots 5 are opened on the vertical rods 10, and the motion joints 3 are set therein.

[0025] Furthermore, such as Figure 3 , 7 As shown, the multi-directional movement of the lumbar support 2 in this embodiment includes forward and backward, up and down, and rotational movements, all of which are achieved through the motion joint 3. There are three movable spaces between the motion joint 3 and the first mounting slot 4 and the second mounting slot 5, and each of the three movable spaces allows the motion joint 3 to move in different directions. There are two movable spaces between the motion joint 3 and the first mounting slot 4 or two movable spaces between the motion joint 3 and the second mounting slot 5. In this embodiment, there are two movable spaces between the motion joint 3 and the first mounting slot 4, and only one movable space between the motion joint 3 and the second mounting slot 5. Of course, it is also possible to form two movable spaces between the motion joint 3 and the second mounting slot 5.

[0026] The three movable spaces are the forward and backward movement space, the up and down movement space, and the rotational movement space. The up and down movement space and the rotational movement space are formed in the up and down direction of the motion joint 3, while the forward and backward movement space is formed in the forward and backward direction of the motion joint 3. For the up and down movement space, there is space to avoid movement in both the up and down directions between the motion joint 3 and the mounting slot. For the rotational space, there is only space to avoid movement in the upper or lower directions, or there is space in both the up and down directions. For the forward and backward movement space, there can also be space to avoid movement only in front of or behind the motion joint 3. Through the above-mentioned structural settings of the connection positions, the lumbar support 2 can move forward and backward, up and down, and rotate on the back frame 1, so that the user can adjust it as needed, improving applicability and comfort. The multi-dimensional movement of the lumbar support 2 can be achieved by only using the structural settings of the motion joint 3 and its connection positions, which greatly simplifies the structure and saves production costs.

[0027] Furthermore, such as Figure 2-8As shown, there is a vertical movement space between the motion joint 3 and the second mounting groove 5, and a front-back movement space and a rotational movement space between the motion joint 3 and the first mounting groove 4. That is, the lumbar support 2 can move vertically relative to the motion joint 3 (after the motion joint 3 is set on the back frame 1, the vertical movement of the motion joint 3 is restricted), and the motion joint 3 can move back and forth and rotate relative to the back frame 1, thereby driving the lumbar support 2 to move back and forth and rotate relative to the back frame 1. Structurally, the groove wall of the second mounting groove 5 is provided with several slots 13 along the vertical direction, and the motion joint 3 is provided with a locking member that cooperates with the slots 13. The locking member is an elastic ball 14. The front-back movement space is formed between the motion joint 3 and the rear inner wall of the first mounting groove 4, and a spring 15 is provided in the front-back movement space. The rotational movement space is formed between the motion joint 3 and the first mounting groove 4. Between the upper and lower side walls, i.e., between the motion joint 3 and the first mounting groove 4, there is a gap in the vertical direction. The rotation of the lumbar support 2 is achieved by the movement of the motion joint 3 in the gap. The spring 15 always provides a forward elastic force to the motion joint 3 so that the lumbar support 2 moves forward. When the human body leans down, the lumbar support 2 can adaptively move backward. In addition, the motion joint 3 is set on the back frame 1 by bolts. The bolts are inserted into the spring 15 and are slidably set on the back frame 1. After the bolts pass through the back frame 1 and the spring 15, they are connected to the motion joint 3 in the front and rear movement space to prevent the motion joint 3 from coming out of the first mounting groove 4. Moreover, the clearance hole 17 on the back frame 1 for the bolts to pass through has a vertical dimension larger than the diameter of the bolt, so that the bolt can be set to swing up and down. When the lumbar support 2 rotates, the motion joint 3 swings in the first mounting groove 4, and at the same time, it will also drive the bolt to swing up and down.

[0028] More specifically, the second mounting groove 5 is opened on the inner side of the vertical rod 10 and the opening of the second mounting groove 5 faces inward; the back frame 1 includes left and right uprights 11, and a support seat 12 arranged horizontally between the two uprights 11 is provided. The first mounting groove 4 is opened on the support seat 12 and the opening of the first mounting groove 4 faces forward; in this embodiment, the back frame 1 is not a traditional complete four-sided frame, its lower end is open, and the support seat 12 is located in the middle and lower part of the uprights 11 to correspond to the position of the waist rest 2; the moving joint 3 is L-shaped so that it can be inserted into the first mounting groove 4 and the second mounting groove 5 at the same time; the clearance hole 17 is provided on the support seat 12 and the opening faces backward, and the clearance hole 17 communicates with the first mounting groove 4.

[0029] In addition, the second mounting groove 5 can also be opened on the outer side of the vertical rod 10 with the opening of the second mounting groove 5 facing outward; the first mounting groove 4 is correspondingly opened on the inner side of the vertical rod 11 with the opening facing inward, and the motion joint 3 can be straight rod or block.

[0030] During installation, the L-shaped moving joints 3 are inserted into the first mounting slot 4 and the second mounting slot 5 from two directions. Specifically, the two moving joints 3 are first inserted into the second mounting slot 5 of the lumbar support 2 in the left-right direction, so that the elastic retaining ball 14 cooperates with the retaining slot 13. Then, the lumbar support 2 and the two moving joints 3 are moved together, so that the other end of the moving joint 3 is inserted into the first mounting slot 4 from front to back. During this process, a spring 15 is sleeved on the cylindrical tail of the moving joint 3, so that the spring 15 enters the front-back movement space. Finally, a bolt is inserted from the clearance hole 17 to connect the moving joint 3, restricting the moving joint 3 in the first mounting slot 4 and preventing it from moving left or right. Due to the L-shaped structure of the moving joint 3, the lumbar support 2 is also restricted by the moving joint 3, so that the lumbar support 2 cannot be detached.

Claims

1. A chair back assembly, characterized in that: The device includes a support member and a lumbar support. A scissor joint is provided between the lumbar support and the support member. The lumbar support is movably mounted on the support member through the scissor joint and can move in multiple directions on the support member. The support member has a first mounting groove and the lumbar support has a second mounting groove. The two ends of the scissor joint are respectively installed in the first mounting groove and the second mounting groove. Movable space is provided between the scissor joint and the first mounting groove and the second mounting groove. The movable space is configured to allow the scissor joint to move and cooperate with the support member and the lumbar support respectively.

2. The chair back assembly according to claim 1, characterized in that: There are three movable spaces between the joint and the first and second mounting slots. One movable space is located between the joint and the first or second mounting slot, and the other two movable spaces are located between the joint and the other mounting slot. The three movable spaces are the front-back movement space, the vertical movement space, and the rotational movement space. The vertical movement space and the rotational movement space are formed in the vertical direction of the joint, and the front-back movement space is formed in the front-back direction of the joint.

3. The chair back assembly according to claim 2, characterized in that: The vertical movement space is located between the movement joint and the second mounting groove. The second mounting groove has several slots along the vertical direction on its wall. The movement joint has a snap-fit ​​component that engages with the slots.

4. The chair back assembly according to claim 2, characterized in that: The front-to-back movement space and the rotational movement space are located between the joint and the first mounting groove. The front-to-back movement space is formed between the joint and the rear inner wall of the first mounting groove, and a spring is provided in the front-to-back movement space. The rotational movement space is formed between the joint and the upper and lower side walls of the first mounting groove.

5. The chair back assembly according to claim 4, characterized in that: The movable joint is mounted on the support by bolts, which are inserted into the spring and slidably mounted on the support.

6. The chair back assembly according to claim 1, characterized in that: There are two joints, which are located at the left and right ends of the lumbar support.

7. The chair back assembly according to claim 6, characterized in that: The lumbar support has a frame structure, including vertical bars on the left and right sides, and a second mounting groove is opened on the inner side of the vertical bar with the opening of the second mounting groove facing inward; the support includes a support seat arranged horizontally on the left and right sides, and a first mounting groove is opened on the support seat with the opening of the first mounting groove facing forward.

8. The chair back assembly according to claim 7, characterized in that: The joints are L-shaped.

9. The chair back assembly according to claim 6, characterized in that: The lumbar support is a frame structure, including vertical bars on the left and right sides, and a second mounting groove is opened on the outer side of the vertical bar with the opening facing outward; the support member is a frame structure, including uprights on the left and right sides, and a first mounting groove is opened on the inner side of the upright with the opening facing inward.

10. The chair back assembly according to claim 1, characterized in that: The support is a back frame or a back bracket.

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