Seat backrest with adjustable headrest

Abstract

The utility model provides a seat backrest with an adjustable headrest. The seat backrest comprises a backrest body, a headrest body and a connecting piece, wherein the headrest body is connected with the backrest body through the connecting piece; the connecting piece comprises a first connecting part, a suspension part and a second connecting part; the lower end of the first connecting part is connected to the backrest body and can slide in the length direction of the backrest body, the upper end of the first connecting part is fixedly connected to one end of the suspension part, the other end of the suspension part extends in the radial direction towards one side of the front face of the backrest body and is hinged to the lower end of the second connecting part, and the headrest body is connected to the upper end of the second connecting part. The suspension part radially extends towards one side of the front surface of the backrest body, so that the headrest body connected with the second connecting part is suspended at the front end of the backrest body, the headrest is more in line with ergonomics, and a user can sit more comfortably; the second connecting part is hinged to the suspension part, the headrest body can be turned downwards to be attached to the front face of the backrest body, the overall length of the seat backrest is reduced, and a user can conveniently store and carry the seat backrest.

Description

Technical Field

[0001] This utility model relates to the field of folding chair technology, specifically to a seat back with an adjustable headrest. Background Technology

[0002] As people's living standards continue to improve, outdoor camping is becoming more and more frequent. Folding chairs, as a common piece of equipment for outdoor camping, are favored for their easy unfolding and retraction. Folding chairs typically consist of a seat and a backrest, both of which include a frame and a flexible fabric surface. When in use, the frame is unfolded outwards, allowing the user to sit and lean against the fabric. When not in use, the frame is folded inwards, achieving a folded-down effect, saving space and offering high portability.

[0003] Currently, the backrests of folding chairs only provide basic back support and relaxation. However, in actual use, people tend to recline for short periods to achieve greater comfort and relaxation, which requires simultaneous support and relaxation for the head. Therefore, headrests are added above the backrest to provide head support.

[0004] However, most existing headrests are flush with the chair back, making it difficult to conform to the curve of the user's back and reducing the user's comfort. Moreover, as an extension of the chair back, the headrest also increases the overall length, making the folded size still relatively large and inconvenient to store and carry. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an adjustable headrest seat back that can improve user comfort and is easy to store.

[0006] The technical solution of this utility model is to provide a seat back with an adjustable headrest having the following structure:

[0007] The device includes a backrest body, a headrest body, and a connector. The headrest body is connected to the backrest body via the connector. The connector includes a first connecting part, a suspension part, and a second connecting part. The lower end of the first connecting part is connected to the backrest body and can slide along the length of the backrest body. The upper end of the first connecting part is fixedly connected to one end of the suspension part. The other end of the suspension part extends radially toward one side of the front of the backrest body and is hinged to the lower end of the second connecting part. The headrest body is connected to the upper end of the second connecting part.

[0008] With the above structure, the adjustable headrest seat back of this utility model has the following advantages compared with the prior art:

[0009] By extending radially towards one side of the front of the backrest body through the suspension part, the headrest body connected to the second connecting part is suspended above the front of the backrest body, which is more ergonomic and makes the user more comfortable to sit in. The second connecting part is hinged to the suspension part, which allows the headrest body to be flipped down to fit against the front of the backrest body, thus reducing the overall length of the seat back and making it easier for the user to store and carry.

[0010] Preferably, the backrest body has a slot extending along its length and having an open top, and the lower end of the first connecting part is slidably connected to the slot; the backrest body has a plurality of positioning holes evenly distributed along its length and communicating with the slot, and the first connecting part has a spring pin for engaging in one of the positioning holes. By adjusting the depth to which the lower end of the first connecting part is inserted into the slot, the height of the headrest body can be adjusted to meet the needs of different users; the cooperation between the spring pin and the positioning hole acts as a stop, facilitating user adjustment and preventing the first connecting part from automatically shifting within the slot.

[0011] Preferably, the diameters of the positioning holes increase sequentially from bottom to top, and the diameter of the uppermost positioning hole is not less than the outer diameter of the elastic pin. There can be three positioning holes. The diameters of the first two positioning holes from bottom to top should be smaller than the outer diameter of the elastic pin, allowing only the arc-shaped end of the elastic pin to be inserted. This arrangement results in less resistance during adjustment of the first two positions, making it easier for the user to lift the headrest body upwards. When the user pulls to the last positioning hole, because its diameter is not less than the outer diameter of the elastic pin, the elastic pin will be fully inserted into the positioning hole, preventing the first connecting part from dislodging from the slot due to excessive force.

[0012] Preferably, the positioning holes are located on the inner side of the backrest body. This makes the outer wall of the backrest body smooth and clean, improving the overall aesthetics.

[0013] Preferably, the first connecting part has an inwardly curved surface extending along its length on one side wall facing the front of the backrest body. The slot has a protruding surface that matches the curved surface, and the protruding surface and the curved surface are in clearance fit. The first connecting part is mostly hollow, which can save materials and reduce weight. To ensure sufficient strength, an curved surface is provided on its side wall, which can increase the stress surface between the first connecting part and the slot and prevent the first connecting part from deforming.

[0014] Preferably, the suspension part is provided with a limiting boss for abutting against the side wall of the second connecting part, so that the second connecting part is parallel to the first connecting part. The limiting boss can play a positioning role, so that the maximum angle when the headrest body is flipped upward is 180 degrees, at which time the headrest body is just parallel to the backrest body.

[0015] Preferably, the backrest body includes a backrest frame, a backrest support fabric, and a folding frame; there are two backrest frames arranged symmetrically, and the slots and positioning holes are provided on the backrest frames; there are two connectors, and the first connecting part on each connector is inserted into the corresponding slot; the two ends of the backrest support fabric are respectively connected to one of the backrest frames, and the folding frame is located behind the backrest support fabric, and its two ends are respectively hinged to one of the backrest frames.

[0016] Preferably, the folding frame includes a first link, a connecting block, and a second link. The opposite ends of the first link and the second link are respectively hinged to the corresponding backrest frame, and the opposite ends are hinged to the connecting block.

[0017] Preferably, there are two folding frames, which are spaced apart along the length of the backrest frame; the connecting blocks on the two folding frames are connected by a third link. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the connecting component in this utility model.

[0020] Figure 3 This is a schematic diagram of the backrest body in this utility model.

[0021] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0022] Figure 5 This is a schematic diagram of the headrest body in this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Backrest body; 11. Backrest frame; 111. Slot; 112. Positioning hole; 113. Protruding surface; 12. Backrest support fabric; 13. Folding frame; 131. First connecting rod; 132. Connecting block; 133. Second connecting rod; 134. Third connecting rod; 2. Headrest body; 21. Headrest frame; 22. Headrest support fabric; 23. Headrest folding frame; 3. Connector; 31. First connecting part; 311. Elastic pin; 312. Arc-shaped surface; 32. Suspension part; 321. Limiting boss; 33. Second connecting part. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. At the same time, the terms "first", "second", etc., are only used to distinguish the names of various components and do not have a primary or secondary relationship. Therefore, they should not be construed as limitations on this utility model.

[0027] like Figure 1 , Figure 2 , Figure 3 Figure 4 and Figure 5 As shown;

[0028] This utility model discloses a seat back with an adjustable headrest: including a backrest body 1, a headrest body 2 and two connecting pieces 3, the two ends of the headrest body 2 are connected to the backrest body 1 through the connecting pieces 3.

[0029] The backrest body 1 includes a backrest frame 11, a backrest support fabric 12, and a folding frame 13. There are two backrest frames 11, which are symmetrically arranged. The backrest support fabric 12 is made of flexible material, and its two ends are respectively connected to one of the backrest frames 11. The folding frame 13 is located behind the backrest support fabric 12, and its two ends are respectively hinged to one of the backrest frames 11.

[0030] The folding frame 13 includes a first link 131, a connecting block 132, and a second link 133. The opposite ends of the first link 131 and the second link 133 are respectively hinged to the corresponding backrest frame 11, and the opposite ends are hinged to the connecting block 132.

[0031] There are two folding frames 13, which are spaced apart along the length of the backrest frame 11. The connecting blocks 132 on the two folding frames 13 are connected by a third link 134. The top of the upper connecting block 132 is also provided with a handle. When the user pulls the handle, the lower connecting block 132 can be lifted up together by the third link 134, which makes it convenient for the user to fold the backrest body 1.

[0032] The headrest body 2 has a similar structure to the backrest body 1, including a headrest frame 21, a headrest support fabric 22, and a headrest folding frame 23. There are two headrest frames 21, which are symmetrically arranged. The two ends of the headrest support fabric 22 are respectively connected to one of the headrest frames 21. The structure of the headrest folding frame 23 is the same as that of the folding frame 13, and its two ends are respectively hinged to one of the headrest frames 21.

[0033] The connector 3 includes a first connecting part 31, a suspension part 32, and a second connecting part 33. The backrest frame 11 of the backrest body 1 is provided with a slot 111 extending along its length and having an open top. The lower end of the first connecting part 31 is slidably connected to the corresponding slot 111. The upper end of the first connecting part 31 is fixedly connected to one end of the suspension part 32. The other end of the suspension part 32 extends radially toward one side of the front of the backrest body 1 and is hinged to the lower end of the second connecting part 33. The upper end of the second connecting part 33 is connected to the headrest frame 21 of the headrest body 2.

[0034] This utility model extends radially toward one side of the front of the backrest body 1 via the suspension part 32, so that the headrest body 2 connected to the second connecting part 33 is suspended at the front end of the backrest body 1. This is more ergonomic and makes the user more comfortable to sit in. The second connecting part 33 is hinged to the suspension part 32, so that the headrest body 2 can be flipped down to fit against the front of the backrest body 1. This reduces the overall length of the seat back and makes it easier for the user to store and carry.

[0035] The backrest body 1 has several positioning holes 112 evenly distributed along its length and communicating with slots 111. The first connecting part 31 has a spring pin 311 for engaging with one of the positioning holes 112. The user can adjust the height of the headrest body 2 by adjusting the depth of the lower end of the first connecting part 31 inserted into the slot 111 to meet the needs of different users. The cooperation between the spring pin 311 and the positioning hole 112 acts as a stop, making it convenient for the user to adjust and preventing the first connecting part 31 from automatically shifting within the slot 111.

[0036] The positioning holes 112 can be configured as three, with the diameter of the positioning holes 112 increasing sequentially from bottom to top. The diameter of the first two positioning holes 112 from bottom to top should be smaller than the outer diameter of the elastic pin 311, allowing only the arc-shaped end of the elastic pin 311 to be inserted. The diameter of the uppermost positioning hole 112 should not be smaller than the outer diameter of the elastic pin 311. With this configuration, the resistance when adjusting the first two positions will be relatively small, making it easier for the user to lift the headrest body 2 upwards. When the user pulls to the last positioning hole 112, since its diameter is not smaller than the outer diameter of the elastic pin 311, the elastic pin 311 will be fully inserted into the positioning hole 112, preventing the first connecting part 31 from coming out of the slot 111 due to excessive force applied by the user.

[0037] The positioning hole 112 is located on the inner side of the backrest body 1, which can make the outer side wall of the backrest body 1 smooth and clean, and improve the overall aesthetics.

[0038] The first connecting part 31 is mostly hollow, which can save materials and reduce weight. In order to ensure that it has sufficient strength, the present invention provides an arc-shaped surface 312 extending along its length and concave on one side wall of the first connecting part 31 facing the front of the backrest body 1. At the same time, a protruding surface 113 adapted to the arc-shaped surface 312 is provided in the slot 111. The protruding surface 113 and the arc-shaped surface 312 are fitted with a gap. This can increase the force-bearing surface of the first connecting part 31 and the slot 111 and prevent the first connecting part 31 from deforming.

[0039] The suspension part 32 is provided with a limiting boss 321, which abuts against the side wall of the second connecting part 33, so that the second connecting part 33 is parallel to the first connecting part 31. The limiting boss 321 can play a positioning role, so that the maximum angle when the headrest body 2 is flipped upward is 180 degrees, at which time the headrest body 2 is just parallel to the backrest body 1, making the user more comfortable.

[0040] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A seat backrest with an adjustable headrest, comprising a backrest body (1), a headrest body (2), and a connector (3), wherein the headrest body (2) is connected to the backrest body (1) via the connector (3); characterized in that: The connector (3) includes a first connecting part (31), a suspension part (32), and a second connecting part (33); the lower end of the first connecting part (31) is connected to the backrest body (1) and can slide along the length direction of the backrest body (1); the upper end of the first connecting part (31) is fixedly connected to one end of the suspension part (32); the other end of the suspension part (32) extends radially toward one side of the front of the backrest body (1) and is hinged to the lower end of the second connecting part (33); the headrest body (2) is connected to the upper end of the second connecting part (33).

2. A seat back with an adjustable headrest according to claim 1, characterized in that: The backrest body (1) is provided with a slot (111) extending along its length and having an open top. The lower end of the first connecting part (31) is slidably connected in the slot (111). The backrest body (1) is provided with a plurality of positioning holes (112) evenly distributed along its length and connected to the slot (111). The first connecting part (31) is provided with an elastic pin (311) for engaging in one of the positioning holes (112).

3. A headrest-adjustable seat back as defined in claim 2, characterized by: The diameters of the positioning holes (112) increase sequentially from bottom to top, and the diameter of the uppermost positioning hole (112) is not less than the outer diameter of the elastic pin (311).

4. A headrest-adjustable seat back according to claim 2 or 3, characterized in that: The positioning hole (112) is located on the inside of the backrest body (1).

5. A headrest-adjustable seat back as defined in claim 4, characterized by: The first connecting part (31) has an arc-shaped surface (312) extending along its length and concave on one side wall facing the front of the backrest body (1). The slot (111) has a protruding surface (113) that matches the arc-shaped surface (312). The protruding surface (113) and the arc-shaped surface (312) are in clearance fit.

6. The recliner of claim 1 wherein: The suspension part (32) is provided with a limiting boss (321) for abutting against the side wall of the second connecting part (33) so that the second connecting part (33) is parallel to the first connecting part (31).

7. The headrest-adjustable seat back of claim 2, wherein: The backrest body (1) includes a backrest frame (11), a backrest support fabric (12), and a folding frame (13); there are two backrest frames (11), which are symmetrically arranged, and the slots (111) and positioning holes (112) are arranged on the backrest frames (11); there are two connectors (3), and the first connecting part (31) on each connector (3) is inserted into the corresponding slot (111); the two ends of the backrest support fabric (12) are respectively connected to one of the backrest frames (11), and the folding frame (13) is located behind the backrest support fabric (12), and its two ends are respectively hinged to one of the backrest frames (11).

8. A headrest-adjustable seat back as defined in claim 7, characterized by: The folding frame (13) includes a first link (131), a connecting block (132), and a second link (133). The opposite ends of the first link (131) and the second link (133) are respectively hinged to the corresponding backrest frame (11), and the opposite ends are hinged to the connecting block (132).

9. A headrest-adjustable seat back according to claim 8, characterized in that: There are two folding frames (13), which are spaced apart along the length of the backrest frame (11); the connecting blocks (132) on the two folding frames (13) are connected by a third link (134).

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