Seat backrest and student seat

Abstract

The utility model belongs to the field of seats, and particularly relates to a seat backrest and a student seat. The headrest is rotationally arranged on the backrest body, the headrest has a folded state and an unfolded state relative to the backrest body through rotation, and the supporting assembly is used for supporting the headrest to keep the headrest in the unfolded state; the supporting assembly is provided with a fixing piece arranged on the rear side of the backrest body and a supporting piece, one end of the supporting piece is movably arranged on the fixing piece, and the other end of the supporting piece is used for supporting the headrest. The headrest is rotationally arranged on the backrest body, the headrest can be adjusted to be in the unfolded state or the folded state according to the needs of a user, the user can rest by leaning the head on the headrest in the unfolded state, and the headrest is located on the rear side of the backrest body in the folded state, so that the sight of the user behind can be prevented from being blocked.

Description

Technical Field

[0001] The utility model belongs to the field of seats, in particular to a seat back and a student seat. Background Art

[0002] The chairs currently on the market, especially the student chairs used by students in schools, usually only include a seat and a backrest, and the backrest is fixed to the seat. Therefore, when students are resting, they can only lie on the desk, which is not conducive to the health of students' necks in the long run. In order to solve the above problems, some seats with adjustable backrests have appeared on the market. The backrests can be rotated or retracted, so that students can lean directly on the seats to rest. Although this type of seat can be used for students to lean on, there are still some shortcomings. For example, there is no headrest on the backrest of the seat, resulting in a lack of support for the student's head when leaning on it, and the leaning is not comfortable enough; some seats are equipped with headrests, but because the headrests are fixed and higher than the backrest, it is easy to block the sight of students at the back during class, affecting the learning of students at the back. Summary of the invention

[0003] The utility model aims to provide a seat back and a student seat, wherein a headrest is rotatably arranged on a backrest body, and the headrest can be adjusted to an unfolded state or a folded state according to user needs.

[0004] The purpose of the utility model is achieved in this way:

[0005] The utility model proposes a seat backrest, which has the following characteristics: a backrest body; a headrest, which is rotatably arranged on the backrest body and can be folded and unfolded relative to the backrest body by rotation; and a support component, which is used to support the headrest so that it remains in the unfolded state; wherein the support component comprises: a fixing member, which is arranged on the rear side of the backrest body, and a support member, one end of which is movably arranged on the fixing member and the other end of which is used to support the headrest.

[0006] The seat back provided in the present invention may also have such a feature that the support member includes: a movable portion inserted into the interior of the fixing member, a support portion extending out of the fixing member for supporting the headrest, and a socket for inserting the movable portion is provided on the fixing member.

[0007] The seat back provided in the present invention may also have such a feature that the portion of the movable portion extending into the insertion hole is provided with a strip-shaped limiting groove, and the fixing member is a sleeve having a limiting member whose inner end can penetrate the wall of the sleeve and be embedded in the strip-shaped limiting groove.

[0008] The seat back provided in the present invention may also have the feature that a support matching portion matching with the support member is provided on the rear side of the headrest.

[0009] The seat backrest provided in the present invention may also have the following characteristics: the support portion is a horizontal bar or a vertical bar, and the support matching portion is provided with a slot for the horizontal bar or the vertical bar to be embedded.

[0010] The seat backrest proposed in the present invention may also have the following characteristics: the support member is a U-shaped member or a T-shaped member, the support portion is a cross bar, and the support matching portion is provided with a slot for the cross bar to be embedded; when the support member is a U-shaped member, the movable portion is a vertical rod arranged at both ends of the cross bar, the vertical rod is connected to the cross bar by a smooth transition portion, and the upper end of the sleeve is provided with an arc groove that matches the smooth transition portion; when the support member is a T-shaped member, the movable portion is a vertical rod arranged in the middle of the cross bar, the vertical rod is connected to the cross bar by a smooth transition portion, and the upper end of the sleeve is provided with an arc groove that matches the smooth transition portion.

[0011] The seat back provided in the present invention may also have such a feature that when the headrest is in the folded state, the height of the top of the support member is lower than the top height of the backrest body, or part of the headrest covers the top of the support member.

[0012] The seat back provided in the present invention may also have such a feature that a rotating seat is arranged on the upper rear side of the backrest body, and a rotating part is arranged on the headrest corresponding to the rotating seat, and the rotating part is rotatably arranged on the rotating seat through a rotating shaft.

[0013] The seat back provided in the present invention may also have such a feature that an arc-shaped limit block is formed on the side of the rotating seat facing the rotating part, and an arc-shaped limit groove is opened on the side of the rotating part facing the rotating seat, and the arc-shaped limit block is embedded in the arc-shaped limit groove; the arc-shaped limit groove has a closed first end and a second end, when the limit block is embedded in the first end, the headrest is in the folded state, and when the limit block is embedded in the second end, the headrest is in the unfolded state.

[0014] The seat backrest provided in the present invention may also have the following feature, further comprising a locking member for fixing the headrest relative to the backrest body so that the headrest can be maintained in the folded state.

[0015] The utility model also proposes a student chair having the following characteristics, including: a bottom bracket, a seat installed on the bottom bracket, and a backrest fixedly or movably installed on the bottom bracket and located at the rear side of the seat, wherein the backrest is the seat backrest as described above.

[0016] The student chair proposed in the utility model may also have such a feature that the bottom bracket has a transverse frame, the seat is fixedly arranged in the middle part of the transverse frame, the front end of the transverse frame is telescopically and rotatably provided with a footrest through a telescopic rod, and the rear end of the transverse frame is provided with the backrest through a rotating component.

[0017] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0018] The seat back and student seat proposed by the utility model have a headrest that is rotatably arranged on the backrest body, and the headrest has a folded state and an unfolded state. When the headrest is rotated to be in the unfolded state, the headrest is located above the backrest, and the user can rest his head on the headrest. When the headrest is rotated to be in the folded state, the headrest is located at the rear side of the backrest body, which can avoid blocking the line of sight of the user behind. The user can adjust the headrest according to actual needs. In addition, in order to allow the headrest to remain in the unfolded state, a support component is also provided to support the headrest, so as to prevent the headrest from rotating and folding when the head is pressed against it, and to make the entire headrest more stable. The entire structure is simple and easy to operate, which is very suitable for users, especially students in the classroom. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a simplified structural diagram of a student chair according to Embodiment 1 of the present utility model.

[0020] Figure 2 It is a simplified structural diagram of the student chair of Example 1 of the utility model with the seat removed.

[0021] Figure 3 It is a schematic diagram of a backrest with a headrest in an unfolded state according to Embodiment 1 of the present invention.

[0022] Figure 4 It is a schematic diagram of a backrest with a headrest in a folded state according to Embodiment 1 of the present invention.

[0023] Figure 5 It is a schematic structural diagram of the separation of the headrest and the backrest body in Embodiment 1 of the present invention.

[0024] Figure 6 It is a structural schematic diagram of the support member of the utility model.

[0025] Figure 7 It is a schematic diagram of the installation structure of the fixing piece of the utility model.

[0026] Figure 8 It is a cross-sectional view of the installation structure of the fixing member and the supporting member of the utility model.

[0027] Fig. 9 It is a simplified structural diagram of a student chair according to Embodiment 2 of the present utility model.

[0028] Fig.10 It is a front schematic diagram of a headrest according to Embodiment 2 of the present utility model.

[0029] Fig.11 It is a rear schematic diagram of the headrest of Example 2 of the utility model.

[0030] Fig.12 It is a schematic structural diagram of the support member of Example 3 of the utility model.

[0031] Fig.13 It is a structural schematic diagram of a student chair according to Embodiment 6 of the present utility model.

[0032] 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75 DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the seat back and student chair of the present invention are specifically described below in conjunction with embodiments and drawings.

[0034] <Example 1>

[0035] This embodiment provides a student chair 10, such as Figure 1 As shown, the student chair 10 includes a bottom bracket 1, a seat 2 and a backrest 3. The seat 2 is fixedly mounted on the bottom bracket 1, and the backrest 3 can be fixedly or movably mounted on the bottom bracket 1 and is located at the rear side of the seat 2. In this embodiment, the backrest 3 is mainly movably mounted to explain in detail. Figure 2As shown, the bottom bracket 1 has a transverse frame 11 and a vertical frame 12, wherein the vertical frame 12 includes a pair of vertically arranged support rods 121, a bottom rod 122 arranged at the bottom of the support rods 121, and a reinforcing rod 123 arranged between the pair of support rods 121. The transverse frame 11 is arranged at the top of the support rod 121 and is parallel to the bottom rod 122, and includes a pair of transverse mounting rods 111. The transverse mounting rods 111 are hollow, and a seat 2 is fixedly arranged in the middle. The front end of the transverse mounting rod 111 is provided with a footrest board 4 through a telescopic rod 112 and a rotating head 113. The telescopic rod 112 can be telescopically moved in the transverse mounting rod 111, and the footrest board 4 can be turned over relative to the telescopic rod 112 under the drive of the rotating head 113. When the user lies down or leans on the support rod to rest, the telescopic rod 112 can be pulled out, and the footrest board 4 can be turned up to keep it parallel to the seat 2, so that the user can put his feet on the footrest board 4. When sitting on the seat, the footrest plate 4 can be turned down, and the telescopic rod 112 can be pushed along the transverse mounting rod 111, so that the footrest plate 4 is stored under the seat 2 in a vertical direction, which is convenient for the user to sit. The rear end of the transverse mounting rod 111 is provided with a backrest 3 through a rotating assembly 114.

[0036] The backrest 3 is the seat backrest mentioned above. Figure 3 and Figure 4 As shown, the seat back includes a backrest body 31, a headrest 32 and a support assembly 33. The headrest 32 is rotatably arranged on the backrest body 31 and has a folded state and an unfolded state. Figure 4 When the headrest 32 is in the folded state, the headrest 32 is located at the rear side of the backrest body 31, and its upper part is lower than the upper edge of the backrest body 31, so as to avoid affecting the sight of the rear user; see Figure 3 When the headrest 32 is in the unfolded state, the headrest 32 is located above the backrest body 31, and can be used to support the head of the user when leaning on it. The support assembly 33 is used to support the headrest 32 to keep it in the unfolded state. Specifically, the support assembly 33 has a fixing member 34 and a support member 35. The fixing member 34 is arranged on the rear side of the backrest body 31. One end of the support member 35 is movably arranged on the fixing member 34, and the other end is used to support the headrest 32. Correspondingly, a support matching portion 36 matching with the support member 35 is provided on the rear side of the headrest 32. The fixing member 34 can be integrally formed with the backrest body 31, or it can be fixed separately. In the present embodiment, it is integrally formed.

[0037] The rotation structure between the headrest 32 and the backrest body 31 is as follows: Figure 5As shown, a pair of rotating seats 311 are provided at the rear side of the backrest body 31 near the top, and a pair of rotating parts 321 are provided on the headrest 32 corresponding to the rotating seats 311, each rotating seat 311 corresponds to each rotating part 321 one by one, and the rotating part 321 is rotatably set on the rotating seat 311, and an arc-shaped limiting block 312 is formed on the side of the rotating seat 311 facing the rotating part 321, and an arc-shaped limiting groove 322 is formed on the side of the rotating part 321 facing the rotating seat 311, and the arc-shaped limiting groove 322 is embedded in the arc-shaped limiting groove 322; the arc-shaped limiting groove 322 has a closed first end 322a and a second end 322b, when the arc-shaped limiting block 312 is embedded in the first end 322a, the headrest 32 is in a folded state, and when the arc-shaped limiting block 312 is embedded in the second end 322b, the headrest 32 is in an unfolded state. The rotating seat 311 and the rotating part 321 are each provided with a hole 313 , 323 , and a rotating shaft at least penetrating the rotating seat or the rotating part is provided between the two holes 313 , 323 to guide the rotation of the headrest 32 .

[0038] like Figure 6 As shown, the support member 35 includes a support portion 351, a movable portion 352 and a smooth transition portion 353. In this embodiment, the support member 35 is a U-shaped member, the support portion 351 is a horizontally arranged crossbar, the movable portion 352 is a vertical bar arranged at both ends of the crossbar, and the vertical bar and the crossbar are connected by a smooth transition portion 353. The support portion 351 cooperates with the support matching portion 36 to support the headrest 32, and the fixing member 34 is also provided with a pair of vertical bars corresponding to the pair of vertical bars, such as Figure 5 As shown in FIG. 1 , the supporting matching portion 36 is a fixed block, and a slot 361 matching the shape of the cross bar is provided in the middle. The cross bar is embedded in the slot 361 to achieve the fixation between the supporting portion 351 and the headrest 32. The upper end of the movable portion 352 is connected to the supporting portion 351 through a smooth transition portion 353, and the lower end is inserted into the interior of the fixing member 34, as shown in FIG. Figure 7 As shown, the fixing member 34 is provided with a socket 341 for the movable portion 352 to be inserted into. By pulling the supporting portion 351, the movable portion 352 can be telescopically moved in the socket 341. The opening of the upper end of the sleeve is also provided with an arc groove 343 that cooperates with the smooth transition portion 353.

[0039] In order to prevent the movable part 352 from being separated from the fixing part 34 during the movement, a strip-shaped limiting groove 354 can be provided in the part of the movable part 352 that extends into the insertion hole 341. The fixing part 34 can actually be an internally hollow sleeve, and a limiting member 37 is provided on the sleeve, the inner end of which can penetrate the wall of the sleeve and be embedded in the strip-shaped limiting groove 354. The limiting member 37 can be a screw, that is, a mounting screw hole 342 is provided on the wall of the sleeve and passes through the insertion hole 341. A screw (limiting member 37) is threadedly installed on the mounting screw hole 342. The inner end of the screw extends into the strip-shaped limiting groove 354. The strip-shaped limiting groove 354 has two upper and lower limiting ends, which can cooperate with the screw to prevent the movable part 352 from being separated from the fixing part 34 during the movement. Figure 8 shown.

[0040] When folding the headrest 32, first remove the support member 35 from the support fitting portion 36, then move it downward until there is no interference with the headrest 32, then rotate the headrest 32 backward to fold it, and fold it to the rear side of the backrest body 31. In order to prevent the headrest 32 in the folded state from shaking during use or when moving the seat, a locking member may be provided near the headrest 32 or the backrest body 31 to fix the headrest 32 relative to the backrest body 31 so that the headrest 32 can remain in the folded state. At the same time, when the headrest 32 is in the folded state, the top height of the support member 35 is lower than the top height of the backrest body 31, or part of the structure of the headrest 32 can cover the top of the support member 35, so that the support member 35 does not protrude from the top of the backrest body 31, and the protrusion of the support member does not affect the line of sight or the user's comfort.

[0041] <Example 2>

[0042] This embodiment is based on the above embodiment 1. Figure 9-11 As shown, the headrest 32 is configured as a double-layer structure, including a front portion 324 and a rear portion 325, a cavity is formed between the front portion 324 and the rear portion 325, the supporting matching portion 36 is provided on the rear portion 325, and the front portion 324 can be made of a flexible material to make the user more comfortable when using it.

[0043] <Example 3>

[0044] The difference between this embodiment and the above-mentioned embodiment 1 and embodiment 2 is that Fig.12 As shown, the support member 35 of this embodiment is a T-shaped member, the support portion 351 is a cross bar, the movable portion 352 is a vertical bar arranged in the middle of the cross bar, the vertical bar and the cross bar are connected by a smooth transition portion 353, and only one fixing member is correspondingly provided, which is a sleeve, and an arc groove matching the smooth transition portion is provided at the upper end of the sleeve, and a pair of supporting matching portions are provided with slots respectively matching the two ends of the cross bar.

[0045] <Example 4>

[0046] The difference between this embodiment and the above-mentioned embodiments 1-3 is that the support member 35 of this embodiment is a vertical round rod, and the bottom is the movable part. The movable part is movably and telescopically arranged in the fixing part like the above-mentioned embodiments 1-3, and the part extending from the fixing part at the top is the supporting part, which is used to cooperate with the supporting matching part on the rear side of the headrest. In this case, the slot on the supporting matching part is a vertical slot.

[0047] <Example 5>

[0048] The difference between this embodiment and the above-mentioned embodiments 1-4 is that in this embodiment, no supporting matching part is separately provided on the rear side of the headrest, and when the headrest is in the unfolded state, the supporting member relies on the friction between the supporting member and the fixing member to enable the supporting member to maintain the supporting position to achieve support.

[0049] <Example 6>

[0050] The difference between this embodiment and the above-mentioned embodiments 1-5 is that the rotation between the backrest 3 and the seat 2 of this embodiment is driven by pneumatic means. Fig.13 As shown, a pneumatic driver 51 is provided at the bottom of the seat 2, and the driving end of the pneumatic driver 51 is connected to a rotating main seat 52. The backrest 3 is arranged on the rotating main seat 52 through a pair of rotating rods 53. Under the drive of the pneumatic driver 51, the backrest 3 rotates following the rotating rods 53.

[0051] The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention. As in the above embodiments, only student chairs are listed. In actual situations, this type of seat back structure can also be used on other chairs, such as office chairs. In addition, in the above embodiments, referring to the accompanying drawings, a pair of rotating seats 311 on the backrest body 31 and a rotating portion 321 on the headrest are provided, and they correspond one to one. In actual situations, only one can be provided, such as being provided at the corresponding position in the middle of the backrest body 31 and the headrest 32, which can also play a role of rotation. However, in comparison, the above embodiments use a pair of structures that are more stable.

Claims

1. A seat back, characterized in that: include: Backrest body; a headrest, which is rotatably arranged on the backrest body, and the headrest can be in a folded state and an unfolded state relative to the backrest body by rotating; and A support assembly, used for supporting the headrest to keep it in the deployed state; Wherein, the support assembly comprises: A fixing member is arranged on the rear side of the backrest body, A support member has one end movably arranged on the fixing member and the other end used for supporting the headrest.

2. The seat back according to claim 1, characterized in that: The support member comprises: The movable part is inserted into the fixing part. A support portion extending out of the fixing member and used to support the headrest, The fixing piece is provided with an insertion hole for the movable part to be inserted.

3. The seat back according to claim 2, characterized in that: The portion of the movable part extending into the jack is provided with a strip-shaped limiting groove, and the fixing member is a sleeve, which is provided with a limiting member whose inner end can penetrate the sleeve wall and be embedded in the strip-shaped limiting groove.

4. The seat back according to claim 2, characterized in that: A support matching portion matching with the support member is provided on the rear side of the headrest.

5. The seat back according to claim 4, characterized in that: The support member is a U-shaped member or a T-shaped member, the support portion is a cross bar, and the support matching portion is provided with a slot for the cross bar to be embedded; When the support member is a U-shaped member, the movable portion is a vertical rod disposed at both ends of the cross rod. When the support member is a T-shaped member, the movable portion is a vertical rod arranged in the middle of the cross rod.

6. The seat back according to any one of claims 1 to 5, characterized in that: When the headrest is in the folded state, the height of the top of the support member is lower than the height of the top of the backrest body, or part of the headrest covers the top of the support member.

7. The seat back according to any one of claims 1 to 5, characterized in that: A rotating seat is arranged at the rear side of the backrest body, and a rotating part is arranged on the headrest corresponding to the rotating seat. The rotating part is rotatably arranged on the rotating seat through a rotating shaft.

8. The seat back according to claim 7, characterized in that: An arc-shaped limit block is formed on one side of the rotating seat facing the rotating part, and an arc-shaped limit groove is formed on one side of the rotating part facing the rotating seat, and the arc-shaped limit block is embedded in the arc-shaped limit groove; The arc-shaped limiting groove has a closed first end and a second end. When the limiting block is embedded in the first end, the headrest is in the folded state, and when the limiting block is embedded in the second end, the headrest is in the unfolded state.

9. The seat back according to any one of claims 1 to 5, characterized in that: A locking member is also included, which is used to fix the headrest relative to the backrest body so that the headrest can be kept in the folded state.

10. A student chair, characterized in that: include: Bottom bracket, a seat, mounted on the bottom bracket, a backrest, fixedly or movably mounted on the bottom bracket and located at the rear side of the seat, Wherein, the backrest is a seat backrest as described in any one of claims 1-9.

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