A headrest mounting structure for a seat

Abstract

This utility model discloses a height-adjustable headrest mounting structure for a chair, including a seat, a backrest, a headrest, and a footrest. The headrest is movably mounted on the backrest. A fixing seat is installed on the back of the backrest, and the fixing seat has an insertion hole. A height-adjustable rod is connected to the back of the headrest and is inserted into the insertion hole of the fixing seat. A positioning component is provided in the fixing seat, and multiple positioning slots are provided in the height-adjustable rod. The height-adjustable rod is positioned by the positioning component engaging with any of the positioning slots. This utility model uses the height-adjustable rod and the fixing seat to mount the headrest on the backrest in a way that allows it to slide up and down. A positioning structure with a ball bearing engaging with the positioning slots is provided between the fixing seat and the height-adjustable rod. Compared with existing headrest mounting structures, this is simpler, has fewer parts, and the headrest is easier to adjust. The positioning and assembly structure is stable and not easy to slip off.

Description

Technical Field

[0001] This utility model relates to the field of seat product technology, and in particular to a height-adjustable headrest mounting structure for a seat. Background Technology

[0002] Chairs are essential furniture in people's lives, work, and studies. Traditional chairs lack headrests, making it inconvenient to lean back and rest. To address this, chairs with headrests were designed. However, existing headrests are fixed to the backrest, which is not universally suitable for users of different heights. Taller users may find the headrest too low, while shorter users may find it too high. To address this, some have designed chairs with adjustable headrests, such as the adjustable headrest disclosed in Chinese Utility Model CN202221778873.1. This design uses a lifting mechanism between the movable headrest and the chair back, allowing the headrest to move up and down to change its position. However, this patented solution has the following problems: First, the lifting mechanism is complex and unstable, especially the hook-and-loop fastening method, which is prone to damage and causes the headrest to slip off. Second, it relies mainly on the friction between the movable headrest and the headrest (backrest) to position the headrest, resulting in poor positioning and the headrest easily slipping off. Especially when used at school, students often touch the headrest, making it difficult to keep the headrest in the raised position. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing a simpler, more rationally designed, and more stable seat headrest mounting structure that offers improved assembly and positioning stability.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a height-adjustable headrest mounting structure for a seat, comprising a seat, a backrest, a headrest, and a footrest, wherein the headrest is movably mounted on the backrest; a fixed seat is installed on the back of the backrest, and an insertion hole is provided in the fixed seat; a height-adjustable rod is connected to the back of the headrest, and the height-adjustable rod is inserted into the insertion hole of the fixed seat; a positioning component is provided in the fixed seat, and multiple positioning slots are provided in the height-adjustable rod, wherein the height-adjustable rod is positioned by the positioning component being engaged with any of the positioning slots, thereby achieving the positioning of the headrest.

[0005] Furthermore, a guide groove is provided on the inner side of the lifting rod along the sliding direction, and a guide part is provided in the fixed seat. The guide part protrudes into the insertion hole, and the guide part is embedded in the guide groove after the lifting rod is inserted into the insertion hole.

[0006] Furthermore, each positioning groove is evenly arranged in the guide groove along the sliding direction of the lifting rod, and the positioning component is arranged in the guide part.

[0007] Furthermore, a mounting post is provided in the guide section, and the positioning component is disposed in the hole of the mounting post.

[0008] Furthermore, the positioning component is a ball bearing assembly, which includes a spring and a ball bearing; the positioning groove is an arc-shaped groove, and the positioning of the lifting rod is achieved by pressing the ball bearing into any positioning groove through the spring.

[0009] Furthermore, limit plates and limit parts are respectively provided at the upper and lower ends of the guide groove, and the limit plates and limit parts stop the guide part to form a limit structure for the vertical sliding of the lifting rod.

[0010] Preferably, the limiting plate and the lifting rod are an integral structure, and the limiting part is installed on the lifting rod by screws.

[0011] Furthermore, a hinge seat is provided on the back of the headrest, and the hinge seat is hinged to the top of the lifting rod through a hinge shaft so that the headrest can form a structure that can flip backward.

[0012] This utility model uses a lifting rod and a fixed base to install the headrest on the backrest in a way that allows it to slide up and down. A positioning structure with a ball and a positioning groove is set between the fixed base and the lifting rod. Compared with the existing headrest installation structure, this is simpler, has fewer parts, and the headrest is easy to adjust. The positioning and assembly structure is stable and not easy to slip off. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the present invention;

[0014] Figure 2 This is an overall structural diagram of the present invention from another angle;

[0015] Figure 3 for Figure 2 The image shown is a partial enlarged view of the headrest mounting structure.

[0016] Figure 4 This is an assembly structure diagram of the fixed base and the lifting rod;

[0017] Figure 5 This is an exploded view of the fixed base and the lifting rod;

[0018] Figure 6 This is an exploded structural diagram of the fixed base and the lifting rod from another angle.

[0019] In the diagram, 1 is the stand, 2 is the seat, 3 is the backrest, 4 is the headrest, 41 is the hinge seat, 5 is the lifting rod, 51 is the guide groove, 52 is the positioning groove, 53 is the limiting part, 54 is the limiting piece, 6 is the fixing seat, 61 is the insertion hole, 62 is the guide part, 63 is the mounting post, and 7 is the ball bearing assembly. Detailed Implementation

[0020] In this embodiment, refer to Figures 1-6 The adjustable headrest mounting structure of the seat includes a seat 2, a backrest 3, a headrest 4, and a footrest 1. The headrest 4 is movably mounted on the backrest 3, and the backrest 3 is movably assembled with the seat 2. The seat 2 is mounted on the footrest 1. A fixed seat 6 is installed on the back of the backrest 3, and an insertion hole 61 is provided in the fixed seat 6. A lifting rod 5 is connected to the back of the headrest 4. The lifting rod 5 is inserted into the insertion hole 61 of the fixed seat 6 and can slide up and down along the insertion hole 61 to realize the lifting of the headrest 4. A positioning component is provided in the fixed seat 6, and multiple positioning slots 52 are provided in the lifting rod 5. The lifting rod 5 is positioned by the positioning component being engaged in any positioning slot 52, that is, the headrest 4 is positioned.

[0021] A guide groove 51 is provided on the inner side of the lifting rod 5 along the sliding direction, and a guide part 62 is provided in the fixed base 6. The guide part 62 protrudes into the insertion hole 61. After the lifting rod 5 is inserted into the insertion hole 61, the guide part 62 is embedded in the guide groove 41. This can improve the stability of the lifting rod 5 and the smoothness of lifting.

[0022] Each positioning groove 52 is evenly arranged in the guide groove 51 along the sliding direction of the lifting rod 5, and the positioning component is arranged in the guide part 62.

[0023] A mounting post 63 is provided in the guide section 62, and a positioning component is disposed in the hole of the mounting post 63.

[0024] The positioning component is a ball assembly 7, which includes a spring and a ball; the positioning groove 52 is an arc-shaped groove. When the lifting rod 5 moves up and down, when any positioning groove 52 is aligned with the ball, the spring will press the ball into the positioning groove 52 to achieve positioning of the lifting rod 5.

[0025] Limiting plates 54 and limiting parts 53 are respectively provided at the upper and lower ends of the guide groove 51. The limiting plates 54 and limiting parts 53 stop the guide part 62 to form a limiting structure for the up and down sliding of the lifting rod 5, thereby limiting the lifting adjustment range of the headrest 4.

[0026] The limiting plate 54 and the lifting rod 5 are an integral structure and cannot be disassembled; the limiting part 53 is installed on the lifting rod 5 by screws, and the limiting part 53 can be removed by loosening the screws in order to install or remove the lifting rod 5.

[0027] A hinge seat 41 is provided on the back of the headrest 4. The hinge seat 41 is hinged to the top of the lifting rod 5 through the hinge shaft so that the headrest 4 can form a structure that can flip backward.

[0028] This invention is particularly suitable for use in schools as student seats, providing students with a comfortable seating and lunch break environment.

[0029] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A height-adjustable headrest mounting structure for a seat, comprising a seat, a backrest, a headrest, and a footrest, wherein the headrest is movably mounted on the backrest, characterized in that: A mounting base is installed on the back of the backrest, and the mounting base has a socket; a lifting rod is connected to the back of the headrest, and the lifting rod is inserted into the socket of the mounting base; a positioning component is provided in the mounting base, and multiple positioning slots are provided in the lifting rod. The lifting rod is positioned by the positioning component being engaged into any of the positioning slots. A guide groove is provided on the inner side of the lifting rod along the sliding direction, and a guide part is provided in the fixed seat. The guide part protrudes into the insertion hole, and the guide part is embedded in the guide groove after the lifting rod is inserted into the insertion hole. Limiting plates and limiting parts are respectively provided at the upper and lower ends of the guide groove. The limiting plates and limiting parts stop the guide part to form a limiting structure for the vertical sliding of the lifting rod; the limiting plates and the lifting rod are an integral structure.

2. The seat headrest mounting structure according to claim 1, characterized in that: Each positioning groove is evenly arranged in the guide groove along the sliding direction of the lifting rod, and the positioning component is arranged in the guide part.

3. The seat headrest mounting structure according to claim 2, characterized in that: A mounting post is provided in the guide section, and the positioning component is set in the hole of the mounting post.

4. The adjustable headrest mounting structure for a seat according to claim 3, characterized in that: The positioning component is a ball bearing assembly, which includes a spring and a ball bearing; the positioning groove is an arc-shaped groove, and the spring presses the ball bearing into any positioning groove to achieve the positioning of the lifting rod.

5. The adjustable headrest mounting structure for a seat according to claim 1, characterized in that: The limiting part is installed on the lifting rod by screws.

6. The adjustable headrest mounting structure for a seat according to claim 1, characterized in that: A hinge seat is provided on the back of the headrest. The hinge seat is hinged to the top of the lifting rod through the hinge shaft so that the headrest can be flipped backward.

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