Seat with lifting type headrest

Abstract

The seat with the lifting type headrest comprises a seat plate, a backrest, the headrest and a foot stool, the headrest is movably installed on the backrest, a sliding groove is formed in the backrest, a sliding guide hole is formed in the front face of the sliding groove and located in the front face of the backrest, and the width of an opening of the sliding guide hole is smaller than that of the sliding groove; a sliding foot is fixed to the back face of the headrest through a fixing arm, the sliding foot is embedded in the sliding groove, and the fixing arm penetrates through the sliding guide hole to connect the sliding foot with the headrest; a plurality of positioning holes are formed in the sliding groove, an elastic positioning pin is arranged on the sliding foot, and when the headrest slides to the position where the positioning pin is aligned with any positioning hole, the positioning pin is clamped into the positioning hole so that positioning of the headrest can be achieved. In this way, the headrest assembly stability is higher, and the structure is simpler; the slide rail is arranged on the backrest and can be long, so that the adjusting range of the headrest is large; and the positioning pin is matched with the positioning hole to realize positioning of the headrest, so that the stability is better, and the headrest is not easy to slip off.

Description

Technical Field

[0001] This utility model relates to the field of seating product technology, and in particular to a seat with an adjustable headrest. 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 negatively impacting the cervical spine. 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. Tall users may find the headrest too low, while shorter users may find it too high. Therefore, chairs with adjustable headrests have been designed. For example, Chinese utility model CN202221778873.1 discloses an adjustable headrest for a chair, which uses a height adjustment mechanism between the movable headrest and the chair back, allowing the headrest to move up and down to change its position. However, the technical solution provided by this patent has the following problems: First, its height adjustment mechanism is mainly located on the headrest, and the headrest is generally small in height, which results in a small adjustment range and makes it difficult to adjust it very low, which is not user-friendly for shorter users; Second, the structure of its height adjustment mechanism is relatively complex and its stability is poor, especially the hook fixing method, which is prone to damage and causes the headrest to fall off; Third, relying on the friction between the movable headrest and the headrest (backrest) to position the movable headrest is not very effective, and the headrest is prone to slipping off. Especially when used in schools, students often touch the headrest, making it difficult to keep the headrest in a high position. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a seat with a liftable headrest that features a simpler structure, a more rational design, higher stability in assembly and positioning, and a wider adjustment range.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a seat with a liftable headrest, comprising a seat plate, a backrest, a headrest, and a footrest, wherein the seat plate and the backrest are respectively mounted on the footrest, and the headrest is movably mounted on the backrest. The seat plate is characterized by having a sliding groove in the backrest, with a guide hole on the front of the groove, the guide hole being located on the front of the backrest, and the opening width of the guide hole being smaller than the width of the groove. A sliding foot is fixed to the back of the headrest via a fixing arm, the sliding foot being embedded in the groove, and the fixing arm passing through the guide hole to connect the sliding foot and the headrest. Several positioning holes are provided in the groove, and a flexible positioning pin is provided on the sliding foot. When the headrest slides until the positioning pin aligns with any positioning hole, the positioning pin engages with the positioning hole to achieve positioning of the headrest.

[0005] Furthermore, a slide rail is provided on the back of the backrest, with a slide groove located in the slide rail and a positioning hole located on the back of the slide rail.

[0006] Preferably, the positioning pin adopts a columnar or spherical structure, with an arc-shaped head at its front end. The positioning pin is installed inside the sliding foot by a spring and protrudes backward.

[0007] Preferably, both the slide rail and the sliding foot include two rails, with the two rails extending downwards from the top of the backrest to near the bottom, and the two sliding feet installed near the bottom of the headrest.

[0008] Furthermore, a slot is opened at the top of the slide rail, and the slot is located at the top of the backrest. The sliding foot is inserted into the slide groove through the slot.

[0009] Furthermore, an end cap is installed in the groove to seal the slide and cover the sliding foot inside the slide.

[0010] Furthermore, a buckle is provided on the side wall of the end cap, and a slot is provided on the slide rail to match the buckle. The end cap and the slide rail are locked together by the buckle engaging the slot.

[0011] Furthermore, a fixing seat is provided on the back of the backrest, and the backrest is assembled and fixed to the legs by a fixing rod inserted into the fixing seat.

[0012] Furthermore, it also includes a footrest, which is movably mounted below the seat plate via a footrest bracket.

[0013] This invention mounts the headrest onto the backrest by embedding a sliding foot into a slide rail. The sliding foot can only be pulled out from the top and will not fall off, resulting in higher assembly stability and a simpler structure. The slide rail, located on the backrest, can be quite long, allowing for a wider adjustment range to accommodate more people's needs. The headrest is positioned using a positioning pin that engages with positioning holes on the slide rail, providing better positioning stability. A greater force is required to raise or lower the headrest, preventing it from slipping off with minimal contact. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the present utility model;

[0015] Figure 2 This is an exploded structural diagram of the present invention;

[0016] Figure 3 This is an assembly structure diagram of the backrest and headrest;

[0017] Figure 4 This is a structural diagram of the back of the headrest;

[0018] Figure 5 This is a side view of the headrest.

[0019] In the diagram, 1 is the seat plate, 2 is the backrest, 21 is the fixed seat, 22 is the slide rail, 23 is the groove, 24 is the positioning hole, 25 is the guide hole, 26 is the fixed rod, 3 is the headrest, 31 is the sliding foot, 32 is the positioning pin, 33 is the end cover, 34 is the buckle, 35 is the fixed arm, 4 is the leg, 5 is the foot support, 51 is the shaft seat, 52 is the shaft hole, 53 is the shaft groove, 54 is the limiting part, and 6 is the foot support bracket. Detailed Implementation

[0020] In this embodiment, refer to Figures 1-5 The seat with a height-adjustable headrest includes a seat plate 1, a backrest 2, a headrest 3, and a footrest 4. The seat plate 1 and the backrest 2 are respectively mounted on the footrest 4, and the headrest 3 is movably mounted on the backrest 2. A sliding groove is provided in the backrest 2, and a guide hole 25 is provided on the front of the sliding groove. The guide hole 25 is located on the front of the backrest 2, and the opening width of the guide hole 25 is smaller than the width of the sliding groove. A sliding foot 31 is fixed to the back of the headrest 3 by a fixing arm 35. The sliding foot 31 is embedded in the sliding groove, and the fixing arm 35 passes through the guide hole 25 to connect the sliding foot 31 and the headrest 3, so that the sliding foot 31 will not fall off the guide hole 25. A number of positioning holes 24 are provided in the sliding groove, and a flexible positioning pin 32 is provided on the sliding foot 31. When the height of the headrest 3 needs to be adjusted, slide the headrest 3 up or down until the positioning pin 32 is aligned with the corresponding positioning hole 24. At this time, the positioning pin 32 will be engaged in the positioning hole 24 under the action of elasticity, thus realizing the positioning of the headrest 3.

[0021] A slide rail 22 is provided on the back of the backrest 2, with a sliding groove located in the slide rail 22 and a positioning hole 24 located on the back of the slide rail 22. The slide rail 22 is used to mount the sliding foot 31, which can improve the stability of the headrest 3 and the smoothness of the sliding process.

[0022] The positioning pin 32 adopts a columnar structure (or a spherical structure, i.e., a positioning bead), and its front end is an arc-shaped head so that it can slide out of the positioning hole 24 more smoothly; the positioning pin 32 is installed inside the sliding foot 31 by a spring (not shown) and protrudes backward. The positioning pin 32 will retract after being pressed so that it can be removed from the positioning hole 24.

[0023] Both the slide rail 22 and the sliding foot 31 include two rails. The two slide rails 22 extend downward from the top of the backrest 2 to near the bottom, and the two sliding feet 31 are installed near the bottom of the headrest 3. This allows the headrest 3 to have a large range of adjustment, and it can even be lowered to the bottom of the backrest 2 for use as a lumbar support.

[0024] A slot 23 is opened at the top of the slide rail 22. The slot 23 is located at the top of the backrest 2. The sliding foot 31 is inserted into the slide groove through the slot 23.

[0025] An end cap 33 is installed in the slot 23, which closes the slide and covers the slide foot 31 inside the slide.

[0026] A buckle 34 is provided on the side wall of the end cover 33, and a slot that matches the buckle 34 is provided on the slide rail 22. The end cover 33 and the slide rail 22 are locked and fixed by the buckle 34 engaging the slot.

[0027] A fixing seat 21 is provided on the back of the backrest 2, and the backrest 2 is assembled and fixed to the leg frame 4 by inserting the fixing rod 26 into the fixing seat 21.

[0028] It also includes a footrest 5, which is movably mounted under the seat plate 1 via a footrest bracket 6, so as to place the feet when lying down to rest.

[0029] This invention is particularly suitable for use in schools as student seats, providing students with a comfortable seating and lunch break environment.

[0030] 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 chair with a height-adjustable headrest, comprising a seat, a backrest, a headrest, and a footrest, wherein the seat and backrest are respectively mounted on the footrest, and the headrest is movably mounted on the backrest, characterized in that: A sliding groove is provided in the backrest, and a guide hole is provided on the front of the sliding groove. The guide hole is located on the front of the backrest, and the opening width of the guide hole is smaller than the width of the sliding groove. A sliding foot is fixed to the back of the headrest by a fixing arm. The sliding foot is embedded in the sliding groove, and the fixing arm passes through the guide hole to connect the sliding foot and the headrest. Several positioning holes are provided in the sliding groove, and a flexible positioning pin is provided on the sliding foot. When the headrest slides until the positioning pin is aligned with any positioning hole, the positioning pin engages with the positioning hole to achieve the positioning of the headrest.

2. The seat with a height-adjustable headrest according to claim 1, characterized in that: A slide rail is provided on the back of the backrest, with a slide groove located in the slide rail and a positioning hole located on the back of the slide rail.

3. The seat with a height-adjustable headrest according to claim 1, characterized in that: The positioning pin adopts a columnar or spherical structure, with an arc-shaped head at its front end. The positioning pin is installed inside the sliding foot by a spring and protrudes backward.

4. The seat with a height-adjustable headrest according to claim 2, characterized in that: The slide rails and sliding feet each include two rails, with the two rails extending downwards from the top of the backrest to near the bottom, and the two sliding feet installed near the bottom of the headrest.

5. The seat with a height-adjustable headrest according to claim 2 or 4, characterized in that: A slot is opened at the top of the slide rail, and the slot is located at the top of the backrest. The sliding foot is inserted into the slide groove through the slot.

6. The seat with a height-adjustable headrest according to claim 5, characterized in that: An end cap is installed in the groove, which closes the groove and covers the sliding foot inside the groove.

7. The seat with a height-adjustable headrest according to claim 6, characterized in that: A buckle is provided on the side wall of the end cap, and a slot is provided on the slide rail to match the buckle. The end cap is locked and fixed to the slide rail by snapping the buckle into the slot.

8. The seat with a height-adjustable headrest according to claim 1, characterized in that: A mounting base is provided on the back of the backrest, and the backrest is assembled and fixed to the legs by a fixing rod inserted into the mounting base.

9. The seat with a height-adjustable headrest according to claim 1, characterized in that: It also includes a footrest, which is movably mounted under the seat via a footrest bracket.

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