Chair frame structure

Abstract

The utility model discloses a chair frame structure, and provides a chair frame structure which is simple in structure and low in manufacturing cost, and a backrest frame can synchronously drive a seat surface support frame to automatically slide forwards when lying down, so that the requirement of laying a fixed-length elastic track on a chair frame can be met, and a reserved space at the rear part of the chair frame is saved. The utility model relates to a foldable chair frame, in particular to a foldable chair frame, which solves the technical problems that a chair frame in the prior art is abnormally complicated in structure and high in manufacturing cost, and particularly cannot meet the laying of a fixed-length elastic track and the like, and comprises a seat frame and a backrest frame, the seat frame comprises a base support and a seat surface support frame horizontally and slidably connected onto the base support, and one end of the backrest frame is rotatably connected onto the seat surface support frame; the other end of the backrest is in sliding connection with the base bracket through a backrest sliding groove and a backrest sliding block which are matched with each other and rotates relative to the base bracket.

Description

Technical Field

[0001] This utility model relates to a chair frame structure, and more particularly to a chair frame structure that is simple in structure and can simultaneously drive the seat support frame to slide forward automatically when the backrest frame is reclined, so that the backrest frame can support the human torso and unfold naturally, providing high comfort. This allows for the laying of fixed-length elastic tracks on the chair frame and saves the reserved space at the rear of the chair frame. Background Technology

[0002] A chair frame typically consists of a seat frame and a backrest frame. In traditional chair frame structures, the angles of the seat and backrest frames are relatively fixed, meaning the backrest angle cannot be adjusted. With the improvement of people's living standards, chair frames that allow for free conversion between sitting and reclining have become increasingly popular and are widely used in chair frame structures such as massage chairs. However, existing chair frame structures are relatively complex, especially those designed to improve certain massage functions. For example, Chinese patent CN116763616A, titled "Guide Rail and Massage Chair Frame," while achieving smooth transitions between guide rails and thus solving the problem of noticeable jumping and abnormal noises at the guide rail connection points of the massage mechanism, has an exceptionally complex frame structure, high manufacturing costs, and poor reliability. To address this issue, improvements have been made to the massage mechanism track of massage chairs by laying elastic tracks on the chair frame. However, during use, i.e., when the backrest angle changes, it is necessary to ensure that the length of the elastic track remains constant, a requirement that existing chair frame structures cannot meet. Summary of the Invention

[0003] This utility model mainly provides a chair frame structure that is simple in structure, low in manufacturing cost, and can automatically slide the seat support frame forward when the backrest frame is reclined, thereby meeting the requirements for laying fixed-length elastic tracks on the chair frame and saving the reserved space at the rear of the chair frame. It solves the technical problems of the existing chair frame structure being extremely complex, having high manufacturing cost, and especially being unable to meet the requirements for laying fixed-length elastic tracks.

[0004] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a chair frame structure, including a seat frame and a backrest frame, wherein the seat frame includes a base support and a seat support frame that is horizontally slidably connected to the base support, one end of the backrest frame is rotatably connected to the seat support frame, and the other end is slidably connected to the base support through a matching backrest groove and a backrest slider and rotates relative to the base support. The seat support frame, which supports the human buttocks, is horizontally slidably connected to the base bracket. The rear end of the base bracket is rotatably connected to the lower end of the backrest frame. The upper part of the backrest frame is slidably connected to the base bracket via a backrest slide groove and a backrest slider. When the seat support frame slides horizontally along the base bracket, the backrest frame rotates relative to the base bracket. That is, when the backrest frame reclines, it drives the seat support frame to slide forward. The elastic guide rail fixed to the backrest frame and the seat support frame bends and deforms, but its length remains unchanged. The walking massage mechanism on this track realizes continuous walking massage when the angle changes. At the same time, since the seat support frame slides forward when the backrest frame reclines, it can automatically drive the seat support frame to slide forward simultaneously when the backrest frame reclines. This reduces the space that needs to be reserved at the back of the chair frame. The chair frame can be placed against the wall with zero or small distance. The structure is simple and the manufacturing cost is low. At the same time, it meets the requirements for laying fixed-length elastic tracks on the chair frame.

[0005] Preferably, an electric push rod is provided between the base bracket and the seat support frame or backrest frame. One end of the electric push rod is rotatably connected to the base bracket, and the other end is rotatably connected to the seat support frame or backrest frame. When the electric push rod extends or retracts, the backrest frame can be automatically reclined or erected.

[0006] More preferably, a push rod support frame is provided on the outer bottom of the backrest frame, and the two ends of the electric push rod are rotatably connected to the push rod support frame and the base bracket. The push rod support frame on the outer bottom of the backrest frame to connect the electric push rod optimizes the spatial and linkage structure of the chair frame, making the rotation of the backrest frame smoother and less strenuous.

[0007] Preferably, the backrest slide groove is a C-shaped groove with an outward opening and symmetrically arranged on both sides of the backrest frame. The backrest slider includes a positioning post and a roller slider rotatably connected to one end of the positioning post. The roller slider and the roller slider are slidably connected in the backrest slide groove. The other end of the positioning post passes through the opening of the backrest slide groove and is fixed to the base bracket. The backrest slide groove adopts a C-shaped groove and a sliding engagement with the backrest slider, which has a simple structure and reliable operation and connection.

[0008] More preferably, the two rear sides of the base bracket corresponding to the backrest frame extend upwards to form backrest support rods, and positioning posts are fixed to the top of the backrest support rods. The top of the backrest support rods and the horizontal slide rail of the seat support frame form a three-point support, which provides good stability and reliable support.

[0009] Preferably, C-shaped horizontal grooves are provided on both sides of the base bracket, and corresponding horizontal sliders are provided on the seat support frame. The seat support frame is slidably connected to the C-shaped horizontal grooves through the mutual engagement of the horizontal sliders. The sliding engagement between the C-shaped horizontal grooves and the horizontal sliders results in a simple structure and reliable operation and connection.

[0010] As a better fit, the backrest frame bottom sides corresponding to the C-shaped horizontal slide groove are respectively rotatably connected to the backrest frame horizontal sliders. The backrest frame horizontal sliders are mutually matched and slidably connected in the C-shaped horizontal slide groove. The rear ends of the seat support frame extend outward and upward to form arc-shaped connecting plates. The connecting shaft between the backrest frame and the seat support frame is located between the arc-shaped connecting plate above the backrest frame horizontal slider and the backrest frame.

[0011] Therefore, the chair frame structure of this utility model has the following advantages:

[0012] 1. When the backrest reclines backward, it causes the seat support frame to slide forward. The elastic guide rail fixed on the backrest frame and the seat support frame bends and deforms, but its length remains unchanged. The walking massage mechanism on the track realizes continuous walking massage when the angle changes, thus meeting the installation requirements of the elastic track.

[0013] 2. Because the seat support frame slides forward when the backrest is reclined, the seat support frame can automatically slide forward simultaneously when the backrest is reclined, reducing the space required at the back of the chair frame. The chair frame can be placed against the wall with zero or small distance, saving space. Attached image description:

[0014] Figure 1 This is a structural schematic diagram of a chair frame structure according to the present invention;

[0015] Figure 2 This is another structural schematic diagram of the present invention. Detailed implementation method:

[0016] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0017] Example 1:

[0018] like Figure 1 and Figure 2As shown, this utility model discloses a chair frame structure, including a seat frame 2 and a backrest frame 1. The seat frame 2 includes a rectangular base support 21 with C-shaped horizontal grooves 6 on both sides along its length. The openings of the C-shaped horizontal grooves 6 face inward. One end of a horizontal slider 7 is rotatably connected to the middle of the seat support frame 22 corresponding to the C-shaped horizontal groove 6. The other end of the horizontal slider 7 is slidably connected to the corresponding C-shaped horizontal groove 6. The two rear ends of the seat support frame 22 extend outward and upward along the two side edges of the backrest frame 1 to form arc-shaped connecting plates 10. The arc-shaped connecting plates 10 are rotatably connected to the backrest frame 1 via connecting shafts 11. The bottom sides of the backrest frame 1 corresponding to the C-shaped horizontal grooves 6 are rotatably connected to the horizontal slider 7. The slider 8 and the horizontal slider 8 of the backrest frame are slidably connected in the C-shaped horizontal groove 6, so that the seat support frame 22 is slidably connected to the base support 21. The two sides of the backrest frame 1 are slidably connected to the base support 21 through the matching backrest groove 3 and backrest slider 4 respectively. The backrest groove 3 is a C-shaped groove with the opening facing outward and symmetrically arranged on both sides of the backrest frame 1. The backrest slider 4 includes a positioning post 41 and a roller slider 42 rotatably connected to one end of the positioning post 41. The roller slider 42 is slidably connected in the backrest groove 3. The two sides of the rear side of the base support 21 corresponding to the backrest frame 1 extend upward to form backrest support rods 13. The other end of the positioning post 41 passes through the opening of the backrest groove 3 and is fixed to the top of the backrest support rod 13. The backrest frame 1 can rotate relative to the base support 21. An electric push rod 5 is installed between the base support 21 and the backrest frame 1. A U-shaped push rod support frame 9 is located on the outer side of the bottom of the backrest frame 1. The two ends of the electric push rod 5 are rotatably connected to the middle of the push rod support frame 9 and the middle crossbeam on the front side of the base support 21. Two elastic tracks 12 for use with the massage mechanism of the massage chair are symmetrically laid on both sides of the upper surface of the seat support frame 22 and both sides of the front side of the backrest frame 1. The elastic tracks 12 are suspended at the junction of the seat support frame 22 and the backrest frame 1, and the total length of the elastic tracks 12 remains unchanged when the relative position of the seat support frame 22 and the backrest frame 1 changes.

[0019] Example 2:

[0020] An electric push rod 5 is provided between the middle of the crossbeam on the front side of the base bracket 21 and the rear of the seat support frame 22. The rest is exactly the same as in Embodiment 1.

[0021] The specific embodiments described herein are merely illustrative examples of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A chair frame structure, comprising a seat frame (2) and a backrest frame (1), characterized in that: The seat frame (2) includes a base support (21) and a seat support frame (22) that is horizontally slidably connected to the base support (21). One end of the backrest frame (1) is rotatably connected to the seat support frame (22), and the other end is slidably connected to the base support (21) through a matching backrest groove (3) and a backrest slider (4) and rotates relative to the base support (21).

2. The chair frame structure according to claim 1, characterized in that: An electric push rod (5) is provided between the base bracket (21) and the seat support frame (22) or the backrest frame (1).

3. The chair frame structure according to claim 2, characterized in that: A push rod support frame (9) is provided on the outer side of the bottom of the backrest frame (1), and the two ends of the electric push rod (5) are rotatably connected to the push rod support frame (9) and the base bracket (21).

4. The chair frame structure according to claim 1, characterized in that: The backrest slide groove (3) is a C-shaped groove with an outward opening and symmetrically arranged on both sides of the backrest frame (1). The backrest slider (4) includes a positioning post (41) and a roller slider (42) rotatably connected to one end of the positioning post (41). The roller slider (42) is slidably connected to each other in the backrest slide groove (3). The other end of the positioning post (41) passes through the opening of the backrest slide groove (3) and is fixed on the base bracket (21).

5. A chair frame structure according to claim 4, characterized in that: The base bracket (21) corresponding to the backrest frame (1) extends upward on both sides of the rear side to form a backrest support rod (13), and the positioning post (41) is fixed at the top of the backrest support rod (13).

6. A chair frame structure according to claim 1, characterized in that: C-shaped horizontal grooves (6) are provided on both sides of the base bracket (21), and horizontal sliders (7) are provided on the seat support frame (22). The seat support frame (22) is slidably connected to the C-shaped horizontal grooves (6) through the horizontal sliders (7).

7. A chair frame structure according to claim 6, characterized in that: The backrest frame (1) corresponding to the C-shaped horizontal slide groove (6) has a backrest frame horizontal slider (8) rotatably connected to both sides of its bottom. The backrest frame horizontal slider (8) is slidably connected to each other in the C-shaped horizontal slide groove (6). The two sides of the rear end of the seat support frame (22) extend outward and upward to form an arc-shaped connecting plate (10). The connecting shaft (11) between the backrest frame (1) and the seat support frame (22) is located between the arc-shaped connecting plate (10) above the backrest frame horizontal slider (8) and the backrest frame (1).

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