Adjustable headrest backrest of noon break chair

Abstract

An adjustable headrest backrest of a noon break chair comprises a backrest and a headrest matched with the backrest. Protruding parts capable of containing the two side edges of the headrest are arranged on the two sides of the back face of the backrest, inserting openings for the side edges of the headrest and sliding rails for adjusting the height of the headrest are formed in the two opposite sides of the protruding parts, and sliding grooves are formed in the positions, corresponding to the sliding rails, of the two side edges of the headrest. Compared with the prior art, the two side edges of the headrest are adjustably fixed in the protruding part on the back face of the backrest, the fixing strength of the headrest is improved, and the safe use performance is improved. Meanwhile, the sliding groove of the headrest is in sliding fit with the sliding rail of the protruding part on the back face of the backrest, the adjustment convenience is improved, and the student can easily adjust the height of the headrest.

Description

Technical Field

[0001] The utility model relates to a teaching tool lunch break chair, in particular to a lunch break chair backrest with a headrest that can easily adjust the height of the headrest. Background Art

[0002] Traditional office desks and chairs have few functions and only have basic teaching functions. At present, students have many courses and heavy learning tasks, so the country advocates that students should reduce their burden and move forward. They must study well, eat well, and rest well. In terms of rest, traditional teaching desks and chairs obviously cannot meet this requirement, so a teaching lunch break chair has appeared on the market. This lunch break chair can adjust the backrest angle, allowing students to rest in a reclining position during lunch break, meeting people's resting habits, and can keep students' bodies relaxed to the greatest extent so that they can quickly enter a resting state.

[0003] However, the headrests on the backrests of the current nap chairs are: one is fixed, that is, the height cannot be adjusted; the other is adjustable, but the fixing strength is not strong enough to pose a safety hazard; the height of this type of nap chair is adjusted by providing a slot in the middle of the backrest, and an insert strip is provided under the headrest, and the height is adjusted by inserting the insert strip into the slot. The strength of fixing the headrest is still not enough to ensure safety in use by relying solely on the cooperation between the insert strip and the slot. Utility Model Content

[0004] The purpose of the utility model is to solve the above-mentioned prior art problems and further provide a nap chair backrest with an easily adjustable headrest height.

[0005] The technical solution adopted by the utility model to solve the technical problem is:

[0006] A nap chair with an adjustable headrest backrest comprises a backrest and a headrest matched with the backrest. Both sides of the back of the backrest are provided with raised parts for accommodating both sides of the headrest, opposite sides of the raised parts are provided with insertion openings for the side of the headrest, and slide rails for adjusting the height of the headrest, and slide grooves are provided at the positions of both sides of the headrest corresponding to the slide rails.

[0007] Compared with the prior art, the two sides of the headrest are adjustable and fixed in the raised part on the back of the backrest, which increases the fixing strength of the headrest and improves the safety performance. At the same time, the slide groove of the headrest slides with the slide rail of the raised part on the back of the backrest, which improves the convenience of adjustment, that is, students can easily adjust the height of the headrest.

[0008] Preferably, in order to achieve the control of the adjustable height of the headrest, a high and low gear adjustment device that cooperates with the headrest is provided in the area covered by the headrest and the back of the backrest in the technical solution. Further, in order to improve the aesthetics of the backrest, there are two options for the fixed position of the high and low gear adjustment device, preferably: a high and low gear adjustment device that cooperates with the headrest is provided in the middle of the back of the backrest; preferably: a high and low gear adjustment device that cooperates with the headrest is provided at the insertion port.

[0009] As a preferred structure of the height adjustment device, the height adjustment device includes a blind hole convexly provided on the back of the backrest, the blind hole is filled with a spring and a marble in sequence, and the position of the headrest corresponding to the blind hole is concavely provided with a groove partially accommodating the marble, and the marble can be freely engaged in the groove under the elastic force of the spring and the constraint of the groove. The above grooves can be set in number according to the adjustable height range of the headrest, that is, each groove is a gear, so that when the headrest is adjusted in height, the marble can freely enter and exit the groove under the elastic force of the spring, and the headrest can be fixed at the corresponding gear, that is, at the corresponding height.

[0010] Preferably, the backrest is integrally injection molded.

[0011] Preferably, the headrest is integrally injection molded.

[0012] Preferably, a height adjustment limit mechanism is provided between the backrest and the headrest; this can prevent the headrest from exceeding the adjustment range during adjustment and affecting the use effect. Further, as one of the preferred structures of the height adjustment limit mechanism, the height adjustment limit mechanism includes a limit hole on the headrest that is parallel to the slide groove and is opened along the length of the slide groove, a stud is provided at the position of the limit hole corresponding to the backrest, a limit block is pressed on the headrest and screwed to the stud, and the headrest can be adjusted in height within the length of the limit hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model backrest;

[0014] Figure 2 It is a structural schematic diagram of the headrest of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the limit block of the utility model.

[0016] In the figure: 1. backrest; 2. raised part; 3. insertion port; 4. slide rail; 5. blind hole; 6. stud; 7. headrest; 8. limit hole; 9. limit block; 10. slide groove; 11. spring; 12. marble; 13. groove. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] See also Figure 1 , Figure 2 The illustrated lunch break chair has an adjustable headrest backrest, which includes a backrest 1 and a headrest 7 matched with the backrest 1, as in the prior art. The backrest 1 is used for students to lean on their backs to maintain a sitting or resting posture, and the headrest 7 is used for students to lean on their heads and necks to maintain a relaxed posture. The innovation of this technical solution is that both sides of the back of the original backrest 1 are provided with raised parts 2 that can accommodate the two sides of the headrest 7, and the two opposite sides of the raised part 2 are provided with insertion ports 3 for the side of the headrest 7, and slide rails 4 for the headrest 7 to adjust the height, and at the same time, the two sides of the headrest 7 are provided with slide grooves 10 at the positions corresponding to the slide rails 4. During assembly, the two sides of the headrest 7 are inserted from the insertion ports 3, and the slide grooves 10 on the headrest 7 will correspond to the slide rails 4 on the backrest 1. The headrest 7 can be easily adjusted in height through the cooperation of the slide grooves 10 and the slide rails 4. At this time, both sides of the headrest 7 are embedded in the raised parts 2 on the backrest 1, which improves the fixing strength of the headrest 7 and improves the safety of use.

[0019] See also Figure 1 , Figure 2 In order to further optimize the above technical solution and achieve the purpose of controlling the height of the headrest 7, a high and low gear adjustment device that cooperates with the headrest 7 can be provided in the area covered by the back of the backrest 1 and the headrest 7. The high and low gear adjustment device can be a tooth type, a button type, an automatic hydraulic and pneumatic pressure control type, etc. This technical means is a mature existing technology; two specific settings of the high and low gear adjustment device are provided here: first, it is set between the middle of the back of the backrest 1 and the headrest 7; second, it is set at the insertion port 3 of the raised part 2 on the back of the backrest 1. These two positions are set to meet the aesthetic requirements of the general public and facilitate adjustment. In this embodiment, the height adjustment device is of the marble type, more specifically, a blind hole 5 is convexly provided on the back of the backrest 1, and a spring 11 and a marble 12 are sequentially filled in the blind hole 5, and the spring 11 is in a compressed state in the blind hole 5 so that the marble 12 remains in an ejected state; and a groove 13 for partially accommodating the marble 12 is concavely provided at the position of the headrest 7 corresponding to the blind hole 5, so that the marble 12 can be freely engaged in the groove 13 under the elastic force of the spring 11 and the constraint of the groove 13, thereby setting the position of the height adjustment scale of the headrest 7. The above-mentioned grooves 13 can be set in number according to the adjustable height range of the headrest 7, that is, each groove 13 is a gear, so that when the headrest 7 is adjusted in height, the marble 12 can freely enter and exit the groove 13 under the elastic force of the spring 11, and the headrest 7 can be fixed at the corresponding gear, that is, at the corresponding height.

[0020] The backrest 1 and the headrest 7 in this embodiment can be integrally injection molded, but non-integrated molding is not excluded, which mainly depends on the choice of material; for example, easy-to-mold materials such as plastic can be integrally molded; for difficult-to-mold materials such as metal, a split structure can be selected.

[0021] See also Figures 1 to 3 A height adjustment limit mechanism may also be provided between the headrest 7 and the backrest 1, so that the headrest 7 can be prevented from exceeding the adjustment range during adjustment and affecting the use effect. As one of the preferred structures of the height adjustment limit mechanism, a limit hole 8 can be provided on the headrest 7 parallel to the slide slot 10 and along the length of the slide slot 10, a stud 6 is provided at the position of the limit hole 8 corresponding to the backrest 1, a limit block 9 is pressed onto the headrest 7 and fixed to the stud 6 by screws, and the headrest 7 can be adjusted in height within the length of the limit hole 8. In this way, not only the adjustment scale of the headrest 7 is limited, but also the connection strength of the headrest 7 is further improved, and the safety of use is further improved.

Claims

1. A nap chair with an adjustable headrest and backrest, comprising a backrest and a headrest matched with the backrest, characterized in that: Both sides of the back of the backrest are provided with raised parts that can accommodate the two sides of the headrest, and the opposite sides of the raised parts are provided with insertion openings for the headrest edges and slide rails for adjusting the height of the headrest. Slide grooves are opened at the positions of the two sides of the headrest corresponding to the slide rails.

2. The adjustable headrest backrest of a nap chair as claimed in claim 1, characterized in that: A high and low gear adjustment device cooperating with the headrest is arranged in the area covered by the back of the backrest and the headrest.

3. The adjustable headrest backrest of a nap chair as claimed in claim 2, characterized in that: A high and low gear adjustment device cooperating with the headrest is arranged in the middle of the back of the backrest.

4. The adjustable headrest backrest of a nap chair as claimed in claim 2, characterized in that: The insertion port is provided with a high and low gear adjustment device which cooperates with the headrest.

5. The adjustable headrest backrest of a nap chair according to any one of claims 2 to 4, characterized in that: The high and low gear adjustment device includes a blind hole protruding from the back of the backrest, and the blind hole is filled with a spring and a marble in sequence. The headrest is concavely provided with a groove for partially accommodating the marble at the position corresponding to the blind hole. The marble can be freely engaged in the groove under the elastic force of the spring and the constraint of the groove.

6. The adjustable headrest backrest of a nap chair according to any one of claims 1 to 4, characterized in that: The backrest is integrally injection-molded.

7. The adjustable headrest backrest of a nap chair according to any one of claims 1 to 4, characterized in that: The headrest is integrally injection-molded.

8. The adjustable headrest backrest of a nap chair according to any one of claims 1 to 4, characterized in that: A height adjustment limiting mechanism is arranged between the backrest and the headrest.

9. The adjustable headrest backrest of a nap chair as claimed in claim 8, characterized in that: The height adjustment limit mechanism includes a limit hole on the headrest which is parallel to the slide groove and is opened along the length of the slide groove. A stud is provided at the position of the limit hole corresponding to the backrest. A limit block is pressed onto the headrest and is fixed to the stud by screws. The headrest can be adjusted in height within the length of the limit hole.

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