A seat with an adjustable headrest

Abstract

The utility model provides a kind of adjustable headrest's seat, headrest assembly includes pillow rest, lifting rod and be equipped with the adjusting mechanism of lifting rod top, the top of chair back is equipped with mounting seat, mounting seat is equipped with the sliding slot of cooperation lifting rod, first stop is equipped in sliding slot;The adjusting mechanism includes U block and sliding rod, one limit shaft is installed in the middle of U block, lifting rod is connected below U block, the both ends of sliding rod are connected pillow rest, and sliding rod is longitudinally opened with a both sides through limit slot, the width of limit shaft and limit slot is consistent and passes through the limit slot, the side of limit shaft towards pillow rest is plane, second stop is equipped on the plane and limit slot. Two-stage type extension adjustment can be carried out to headrest, and it is flexible, and good comfort.

Description

Technical Field

[0001] This utility model belongs to the field of seating technology, specifically relating to a seat with an adjustable headrest. Background Technology

[0002] Prolonged sitting while working or studying can have many adverse effects on health, significantly increasing the risk of cervical spondylosis. Therefore, headrests have become common in chairs to facilitate rest and relaxation. However, existing headrests have limited adjustment functions, only allowing for vertical height adjustment. Summary of the Invention

[0003] To address the technical problem of limited headrest adjustment, this invention provides a seat with an adjustable headrest. The headrest allows for two-stage extension adjustment, offering flexible adjustment and good comfort.

[0004] To achieve the objective of this utility model, the technical solution adopted by this utility model is as follows:

[0005] A seat with an adjustable headrest includes a backrest and a headrest assembly. The headrest assembly includes a backrest, a lifting rod, and an adjustment mechanism located at the top of the lifting rod. The top of the backrest has a mounting seat with a sliding groove that mates with the lifting rod. A first stop is provided within the sliding groove. The adjustment mechanism includes a U-shaped block and a sliding rod. A limiting shaft is installed in the middle of the U-shaped block, and the lifting rod is connected to the bottom of the U-shaped block. Both ends of the sliding rod are connected to the backrest. The sliding rod has a limiting groove extending through both sides in a longitudinal direction. The limiting shaft fits the width of the limiting groove and passes through the limiting groove. The side of the limiting shaft facing the backrest is a plane, allowing the sliding rod to slide along this plane. A second stop is provided on the plane and the limiting groove. The axes of the sliding groove and the limiting groove are not parallel.

[0006] The first stop of this utility model includes a base plate and a stop pin disposed on the base plate. The bottom of the mounting base is provided with a mounting groove, which communicates with the sliding groove. The base plate is installed at the bottom of the mounting groove. The stop pin faces the sliding groove. The lifting rod is evenly distributed with a plurality of stop grooves that engage the stop pin.

[0007] Preferably, a placement seat with a side opening is provided above the base plate, the stop pin includes a ball and a housing, the housing is disposed in the placement seat, the end of the housing is provided with a receiving cavity for placing the ball, the ball protrudes from the placement seat, and the stop groove is an arc-shaped groove that fits with the ball.

[0008] Preferably, a vertical mounting post is provided on both sides of the top of the mounting groove, the mounting post is provided with internal threads, and the base plate is provided with two corresponding screw holes.

[0009] More preferably, the screw hole is a stepped hole.

[0010] The second stop of this utility model is a corrugated engagement groove. The corrugated engagement groove is provided on the plane, and the limiting groove is evenly distributed with matching corrugated engagement grooves on the side facing the plane.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. The headrest assembly of this utility model adopts a two-stage adjustment. Pulling the lifting rod upward can fix the height of the adjustment mechanism to complete the first stage of adjustment. Further dragging the sliding rod to fix the position of the headrest can complete the second stage of adjustment. The axes of the limiting groove and the limiting groove are not parallel, which can realize the two-stage extension adjustment of the headrest in terms of height and tilt angle. The adjustment is more flexible, can better adapt to the neck, and has better comfort.

[0013] 2. The lifting rod adopts a stop pin engagement stop limit. The stop pin adopts a split structure, consisting of a shell and a ball bearing, and is installed on the base plate, which facilitates processing, disassembly and installation.

[0014] 3. The sliding rod connected to the headrest uses a corrugated locking groove for stop and limit, which provides good stability when making tilting angle translation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the adjustable headrest seat structure of this utility model.

[0016] Figure 2 This is a structural schematic diagram of the headrest assembly of this utility model in the raised state.

[0017] Figure 3 This is a structural schematic diagram of the headrest assembly of this utility model from another angle.

[0018] Figure 4 This is a schematic diagram of the structure of the first stop and the lifting rod.

[0019] Figure 5 A schematic diagram of the structure of the mounting base with the first stop.

[0020] Figure 6 This is a schematic diagram of the mounting base.

[0021] Figure 7 This is a schematic diagram of the first stop component.

[0022] The following are labeled in the diagram: 1. Headrest assembly; 2. Chair back; 3. Mounting base; 4. Limiting shaft; 5. First stop; 6. Second stop; 7. Mounting column; 8. Placement seat; 9. Outer shell; 10. Ball bearing; 11. Backrest; 12. Lifting rod; 13. Adjustment mechanism; 31. Slide groove; 32. Mounting groove; 41. Flat surface; 51. Base plate; 52. Stop pin; 91. Receiving cavity; 121. Stop groove; 131. U-shaped block; 132. Sliding rod; 133. Limiting groove; 511. Screw hole. Detailed Implementation

[0023] To more clearly and in detail illustrate the objective technical solution of this utility model, the present utility model will be further described below through relevant embodiments. The following embodiments are merely illustrative of the implementation methods of this utility model and do not limit the scope of protection of this utility model.

[0024] Example 1

[0025] like Figure 1-3 As shown, a seat with an adjustable headrest includes a backrest 2 and a headrest assembly 1. The headrest assembly 1 includes a backrest 11, a lifting rod 12, and an adjustment mechanism 13 located on the top of the lifting rod 12. The top of the backrest 2 is provided with a mounting seat 3, which has a sliding groove 31 that mates with the lifting rod 12. A first stop 5 is provided in the sliding groove 31. The adjustment mechanism 13 includes a U-shaped block 131 and a sliding rod 132. The two ends of the U-shaped block 131 are connected by a limiting shaft 4. The lower part of the U-shaped block 131... The lifting rod 12 is connected to the lifting rod 12. The two ends of the sliding rod 132 are connected to the headrest 11. The sliding rod 132 has a limiting groove 133 that runs through both sides in the longitudinal direction. The limiting shaft 4 fits the width of the limiting groove 133 and passes through the limiting groove 133. The side of the limiting shaft 4 facing the headrest 11 is a plane 41, so that the sliding rod 132 can slide along the plane 41. The plane 41 and the limiting groove 133 are provided with a second stop 6. The axes of the sliding groove 31 and the limiting groove 133 are not parallel.

[0026] Pulling the lifting rod 12 upwards will limit the height of the top adjustment mechanism 13 of the lifting rod 12 by the first stop 5, thus completing the first stage adjustment of the headrest; further, dragging the sliding rod 132 upwards or downwards along the plane 41 of the limiting shaft 4 will limit the position of the pillow back 11 connected to the sliding rod 132 by the second stop 6, thus completing the second stage adjustment of the headrest.

[0027] Example 2

[0028] This embodiment is based on embodiment 1:

[0029] like Figure 4 and Figure 5As shown, the first stopper 5 includes a base plate 51 and a stop pin 52 disposed on the base plate 51. The bottom of the mounting base 3 has a mounting groove 32, which communicates with the sliding groove 31. The base plate 51 is mounted to the bottom of the mounting groove 32. The stop pin 52 faces the sliding groove 31. The lifting rod 12 has multiple stop grooves 121 evenly distributed to engage the stop pin 52. The engagement mechanism achieves positioning.

[0030] Example 3

[0031] This embodiment is based on embodiment 2:

[0032] like Figure 6 As shown, a vertical mounting post 7 is provided on both sides of the top of the mounting groove 32. The mounting post 7 is provided with internal threads, and the base plate 51 is provided with two corresponding screw holes 511.

[0033] The screw hole 511 is a stepped hole, which makes it easier to install the nut.

[0034] Example 4

[0035] This embodiment is based on embodiment 2:

[0036] like Figure 7 As shown, a placement seat 8 with a side opening is provided above the base plate 51. The stop pin 52 includes a ball 10 and a housing 9. The housing 9 is located inside the placement seat 8. The end of the housing 9 is provided with a receiving cavity 91 for placing the ball 10. The ball 10 protrudes from the placement seat 8. The stop groove 121 is an arc-shaped groove that fits with the ball 10, making the action of pulling the lifting rod smoother.

[0037] Example 5

[0038] This embodiment is based on embodiment 1:

[0039] like Figure 3 and Figure 4 As shown, the second stop 6 is a corrugated engagement groove. The corrugated engagement groove is provided on the plane 41, and the limiting groove 133 has matching corrugated engagement grooves evenly distributed on one side facing the plane 41.

[0040] The connection methods not mentioned in this utility model are conventional connection methods such as threaded connection, snap-fit ​​connection, riveting, welding, bonding and integral molding.

[0041] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A seat with an adjustable headrest, comprising a backrest and a headrest assembly, characterized in that: The headrest assembly includes a backrest, a lifting rod, and an adjustment mechanism located at the top of the lifting rod. A mounting base is located at the top of the backrest, and the mounting base has a sliding groove that mates with the lifting rod. A first stop is located within the sliding groove. The adjustment mechanism includes a U-shaped block and a sliding rod. A limiting shaft is installed in the middle of the U-shaped block, and the lifting rod is connected to the bottom of the U-shaped block. Both ends of the sliding rod are connected to the backrest. The sliding rod has a longitudinally extending limiting groove that passes through both sides. The limiting shaft fits the width of the limiting groove and passes through it. The side of the limiting shaft facing the backrest is a plane, allowing the sliding rod to slide along this plane. A second stop is located on the plane and the limiting groove. The axes of the sliding groove and the limiting groove are not parallel.

2. The seat with an adjustable headrest according to claim 1, characterized in that: The first stop includes a base plate and a stop pin disposed on the base plate. The bottom of the mounting base is provided with a mounting groove, which communicates with the slide groove. The base plate is installed at the bottom of the mounting groove. The stop pin faces the slide groove. The lifting rod is evenly distributed with multiple stop grooves that engage the stop pin.

3. The seat with an adjustable headrest according to claim 2, characterized in that: The base plate is provided with a placement seat with a side opening. The stop pin includes a ball and a housing. The housing is located in the placement seat. The end of the housing is provided with a receiving cavity for placing the ball. The ball protrudes from the placement seat. The stop groove is an arc-shaped groove that fits with the ball.

4. The seat with an adjustable headrest according to claim 2, characterized in that: A vertical mounting post is provided on both sides of the top of the mounting groove. The mounting post has an internal thread, and the base plate has two corresponding screw holes.

5. The seat with an adjustable headrest according to claim 4, characterized in that: The screw hole is a stepped hole.

6. The seat with an adjustable headrest according to claim 1, characterized in that: The second stop is a corrugated engagement groove. The corrugated engagement groove is provided on the plane, and the limiting groove is evenly distributed with matching corrugated engagement grooves on the side facing the plane.

Images