CN-122004610-A - Headrest and seat

Abstract

The invention discloses a headrest and a seat, wherein the headrest comprises a length adjusting device with a first rotating point and a second rotating point and a head supporting piece which is rotationally connected with the second rotating point, the length adjusting device rotates around the first rotating point to adjust the height of the head supporting piece, the head supporting piece rotates around the second rotating point to adjust the angle of the head supporting piece, the length adjusting device comprises two adjusting rods which rotate in a linkage mode, the length of the adjusting rods is changed by opening and closing movement of the two adjusting rods, the front and back positions and the lifting stroke of the head supporting piece are synchronously adjusted, the height of the head supporting piece is closely related to the front and back positions by the scheme, multidimensional adjustment is realized, the three rotating movements do not interfere with each other even when the lowest point is overlapped with the chair back, the three rotating movements are flexible and fine, the seat comprises a chair back and the headrest, the headrest is arranged on the chair back, the head supporting piece can realize multidimensional adjustment of the height, the front and back positions and angles, the front and the back positions are strong, and the length of the headrest can adapt to different use requirements.

Inventors

• XU JIN
• YUAN SHIDONG

Assignees

• 永艺家具股份有限公司

Dates

Publication Date

20260512

Application Date

20260210

Claims (20)

1. 1. The headrest is characterized by comprising a length adjusting device, wherein the length adjusting device is provided with a first rotating point and a second rotating point, the length adjusting device is rotatably arranged around the first rotating point, a head supporting piece rotating around the second rotating point is rotatably connected to the second rotating point, the height of the head supporting piece is adjusted when the length adjusting device rotates around the first rotating point, the angle of the head supporting piece is adjusted when the head supporting piece rotates around the first rotating point, the length adjusting device comprises two adjusting rod pieces rotating in a linkage mode, the first rotating point is located behind the adjusting rod pieces, the second rotating point is located in front of the adjusting rod pieces, the rotating direction of the adjusting rod pieces is front and back, opening and closing movement is carried out when the two adjusting rod pieces rotate, the length of the length adjusting device in the front and back direction is changed, and when the length of the length adjusting device is changed, the front and back positions of the head supporting piece and the lifting stroke of the head supporting piece are simultaneously changed.
2. 2. The headrest of claim 1 wherein the head support comprises a head frame including two side frame bars spaced apart side to side and the second pivot point is located on the side frame bars.
3. 3. The headrest as claimed in claim 1, wherein the axis of rotation at the first rotation point is horizontally disposed in the left-right direction and the axis of rotation at the second rotation point is horizontally disposed in the left-right direction.
4. 4. The headrest according to claim 1 wherein the length adjustment means further comprises a base having two third pivot points, the rear portions of the two adjustment levers being pivotally connected to the base at respective ones of the two third pivot points.
5. 5. The headrest of claim 4 wherein the first pivot point is located at the rear of the base and the third pivot point is located at the front of the base.
6. 6. The headrest according to claim 1, wherein the two adjustment levers are bifurcated, an included angle is formed between the two adjustment levers, the included angle between the two adjustment levers decreases when the two adjustment levers are folded and rotated, and the length of the length adjustment device increases.
7. 7. The headrest according to any one of claims 1 and 4-6, wherein rear end portions of the two adjustment levers are provided in a linked manner, engagement teeth are provided at the rear end portions of the two adjustment levers, the engagement teeth on the two adjustment levers are engaged with each other, and the two adjustment levers are rotated in a linked manner by the engagement teeth.
8. 8. The headrest of claim 1 wherein guide assemblies are disposed between the front portions of the two adjustment bars and the head support, the head support is movably disposed at the front portions of the two adjustment bars by the guide assemblies, the guide assemblies include sliding guides slidably coupled to the sliding links, the sliding guides are disposed on one of the adjustment bars or the head support, the sliding links are disposed on the other of the adjustment bars or the head support, and the sliding links slide relative to the sliding guides when the adjustment bars are rotated.
9. 9. The headrest according to claim 8 wherein the sliding link includes a sleeve portion that is received over and slidably engages the sliding guide.
10. 10. The headrest according to claim 9 wherein the sliding guide is fixedly connected to the head support, the sliding guide being cylindrical and the sleeve portion being further in rotational engagement with the sliding guide.
11. 11. The headrest of claim 9 wherein the second pivot point is located on a slide guide rotatably engaged with the head support, the slide guide being circumferentially stationary with the slide link, the slide link being rotatably coupled to the front end of the adjustment bar, the slide link being rotatable relative to the adjustment bar and the slide link being slidable inwardly on the slide guide when the two adjustment bars are rotated together.
12. 12. The headrest of claim 11 wherein the sliding guide and the head support have an extension therebetween, the extension extending rearward on the head support and being rotatably coupled to the sliding guide or the extension extending forward on the sliding guide and being rotatably coupled to the head support.
13. 13. The headrest according to claim 9 or 11, wherein a locking assembly is arranged between the sliding guide seat and the sliding connecting rod and comprises a locking block and a locking hole, the locking block and the locking hole are respectively arranged on the sliding guide seat and the sliding connecting rod, and the locking block or the locking hole is arranged in a sliding manner, so that the sliding guide seat and the sliding connecting rod are locked when the locking block enters the locking hole.
14. 14. The headrest according to claim 13, wherein the sliding guide is provided with a sliding block which is arranged in a sliding manner, and a plurality of locking blocks are arranged on the sliding block along the sliding direction of the sliding connecting rod, and the locking hole is formed in the sliding connecting rod.
15. 15. The headrest according to claim 14, wherein the sliding link is provided with a plurality of spaced lock holes along a sliding direction thereof, and a distance between each two adjacent lock holes is equal to a distance between each two adjacent lock pieces.
16. 16. The headrest according to claim 14 wherein the sliding guide is provided with a sliding slot perpendicular to the sliding direction of the sliding link, and the slider is slidably disposed in the sliding slot.
17. 17. The headrest according to claim 16 further comprising a control rod slidably disposed along the sliding direction of the sliding link on the sliding guide, the control rod being inserted into the sliding guide and into the sliding slot, the control rod being engaged with the slider in the sliding slot by a transmission mechanism configured to drive the slider to slide when the control rod slides.
18. 18. The headrest according to claim 17 wherein the transmission structure includes a chute and a transmission post, the chute and the transmission post being disposed on the control rod and the slider, respectively, the transmission post being inserted into the chute.
19. 19. The headrest according to claim 17 wherein the sliding groove is provided with an elastic member, and both ends of the elastic member are respectively connected with the sliding guide seat and the control rod and give the control rod an outward elastic force.
20. 20. A seat comprising a seatback and a headrest as claimed in claim 1, the headrest being provided on the seatback, the position of the head support relative to the seatback in the height direction being changed when the length adjustment device is rotated about the first rotation point, the position of the head support relative to the seatback being changed in the front-rear direction when the adjustment lever is rotated, the head support having a lowest point relative to the seatback, the head support overlapping the seatback when the head support is at the lowest point.

Description

Headrest and seat Technical Field The invention relates to the field of furniture, in particular to a headrest and a seat. Background In the seating field, headrests are used to provide support for the head and neck of a person and to design an arc to better fit the head and neck to promote comfort, but as consumers increasingly pay attention to sitting comfort and health, stationary conventional headrests have failed to meet the use requirements and the market is increasingly being occupied by adjustable headrests. The conventional adjustable headrest has three kinds, namely a height-adjustable headrest, a front-back adjustable headrest and a multi-dimensional adjustment headrest, namely the height-adjustable headrest and the front-back adjustable headrest are simultaneously realized, and the headrest can enable a user to automatically adjust the specific position of the headrest according to the self requirement, so that the conditions of different users are more pertinently met, and the comfort level and the supportability of the headrest are improved. However, the conventional multi-dimensional adjusting headrest often realizes functions by two relatively independent motion components, namely, the headrest is lifted by the lifting motion component, the headrest moves back and forth by the front and back motion component, the structure is complex, the cost is high, and the headrest is also not attractive, particularly, the front and back motion component needs to be provided with a long front and back adjusting seat behind the headrest, and the front and back adjusting seat moves back and forth together by dragging the headrest, so that when the headrest is in a back position, the front and back adjusting seat protrudes back mostly like the tail dragged by the headrest. And in terms of functions, the two motion components are relatively independent, so that a synergistic effect cannot be realized, and after the lifting motion component is lifted, the front and back motion components can only adjust the position of the headrest at the height, so that multidimensional adjustment cannot be really realized. Therefore, there is a need for a headrest that truly enables multi-dimensional adjustment and that is smoother and more flexible to adjust. Disclosure of Invention In order to solve the technical problems, the invention provides a headrest, which comprises a length adjusting device with a first rotating point and a second rotating point and a head supporting piece rotatably connected with the second rotating point, wherein the length adjusting device rotates around the first rotating point to adjust the height of the head supporting piece, the head supporting piece rotates around the second rotating point to adjust the angle of the head supporting piece, the length adjusting device comprises two adjusting rods which rotate in a linkage mode, the two adjusting rods move in an opening-closing mode to change the length of the device, and the front-back position and the lifting stroke of the head supporting piece are synchronously adjusted. And then provides a seat, including the back of the chair and above-mentioned headrest, the back of the chair is located to the headrest, and the head support piece can realize the multidimensional adjustment of height, fore-and-aft position and angle relative the back of the chair, and the mobility is strong, adaptation different user demands. The technical scheme of the invention is realized as follows: A headrest comprises a length adjusting device, wherein the length adjusting device is provided with a first rotating point and a second rotating point, the length adjusting device is rotatably arranged around the first rotating point, a head supporting piece rotating around the second rotating point is rotatably connected to the second rotating point, the height of the head supporting piece is adjusted when the length adjusting device rotates around the first rotating point, the angle of the head supporting piece is adjusted when the head supporting piece rotates around the first rotating point, the length adjusting device comprises two adjusting rod pieces rotating in a linkage mode, the first rotating point is located behind the adjusting rod pieces, the second rotating point is located in front of the adjusting rod pieces, the rotating direction of the adjusting rod pieces is front and back, opening and closing movement is carried out when the two adjusting rod pieces rotate, the length of the length adjusting device in the front and back direction is changed, and when the length of the length adjusting device is changed, the front and back positions of the head supporting piece and the lifting stroke of the head supporting piece are simultaneously changed. The first rotation point is used for adjusting the height of the head support piece, the head support piece is at a height adjusting point, when the length adjusting device rotates around the first rotation point,