Learning chair capable of automatically adjusting backrest

Abstract

The utility model relates to the technical field of seats, in particular to a learning chair capable of automatically adjusting a backrest, which comprises a backrest and a seat, a backrest fixing seat is arranged on the back of the backrest, a seat supporting seat is arranged at the bottom of the seat, and a seat connecting piece connected with the seat is arranged above the seat supporting seat. A first connecting base and a second connecting base are clamped to the front side and the rear side of the lower portion of the seat connecting piece correspondingly, a positioning base of a U-shaped structure is arranged in the seat supporting base, an air cylinder is installed in the positioning base, and the front end and the rear end of the air cylinder are connected with a positioning connecting shaft and a movable connecting shaft correspondingly; air cylinder movable limiting holes matched with the movable connecting shafts in a penetrating mode are symmetrically formed in the two sides of the rear portion of the positioning base. According to the learning chair capable of automatically adjusting the backrest, the limiting seat used for fixing the backrest can be subjected to linkage treatment through the seat connecting piece, rotation of the limiting seat is achieved, the backrest can be tightly attached to the back of a user all the time through cooperation of the linkage rod and the air cylinder, and the learning chair is more comfortable to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair technical field, concretely is a learning chair of automatic adjustment backrest. BACKGROUND

[0002] The chair designed for children and teenagers can adjust the position of backrest, prevent incorrect sitting posture from causing bad posture, distraction and long-term health problems, and prevent spinal problems and improve learning efficiency.

[0003] The existing chair realizes the rotatable treatment of the backrest through manual lever, knob, pneumatic cylinder and other structures, but the backrest is inconvenient for automatic rotation and forward and backward movement, needs manual adjustment, and the backrest is not closely combined with the back of the user, cannot reliably support, and is easy to cause discomfort. UTILITY MODEL CONTENT

[0004] The utility model discloses a learning chair of automatic adjustment backrest to solve the problem that the backrest of the current market learning chair is inconvenient for automatic rotation and forward and backward movement, needs manual adjustment, and the backrest is not closely combined with the back of the user, cannot reliably support, and is easy to cause discomfort.

[0005] To achieve the above object, the utility model provides the following technical scheme: a learning chair of automatic adjustment backrest, including backrest and seat, the backrest back is equipped with backrest fixed seat, the seat bottom is equipped with seat support seat, the seat support seat upper is equipped with with seat connecting piece of seat connection, and the seat connecting piece lower side is respectively clamped with first connecting seat and second connecting seat, the seat support seat is equipped with the locating seat of U type structure, and the locating seat is installed with the pneumatic cylinder, and the pneumatic cylinder front and back ends are connected with locating shaft and movable connecting shaft respectively, the locating seat rear side two sides are opened with the pneumatic cylinder movable limit hole of the movable connecting shaft through cooperation, and the pneumatic cylinder movable limit hole is circular arc structure, and the locating seat front side two sides are opened with the pneumatic cylinder locating hole of the locating shaft through cooperation, make the pneumatic cylinder movable under the location of locating seat, the outside of the locating seat rear side is clamped with the limit seat of U type design, and the limit seat front side two sides are respectively opened with connecting seat fixed hole and mounting hole, and the connecting seat fixed hole is also through cooperation with movable connecting shaft, the backrest fixed seat is equipped with linkage rod, and the linkage rod upper and lower sides are opened with upper connecting hole and lower connecting hole respectively, and the linkage rod lower side is located in seat support seat.

[0006] Preferably, the first connecting seat is a U-shaped structure, and the first connecting seat is inclined and clamped on the outside of the locating seat, and the first connecting seat two sides are respectively opened with first locating hole and first movable connecting hole.

[0007] Preferably, a linkage rod limiting groove corresponding to the position of the linkage rod is arranged in the middle of the back of the limiting seat, and backrest fixing seat mounting holes corresponding to the backrest fixing seat bolts are uniformly and spaced apart arranged on both sides of the back of the limiting seat, positioning connecting holes are symmetrically arranged at the rear of both sides of the limiting seat, and arc-shaped connecting rods are symmetrically arranged on both sides of the outer part of the limiting seat, and the lower connecting holes are clamped and fastened to the end of the cylinder close to the movable connecting shaft.

[0008] Preferably, the second connecting seat is also a U-shaped structure, and the second connecting seat is clamped on the inner side of the positioning seat, second movable connecting holes and second positioning connecting holes are arranged at the front and rear of both sides of the second connecting seat, and a cylinder limiting groove corresponding to the position of the cylinder is arranged above the second connecting seat.

[0009] Preferably, first connecting seat positioning holes are symmetrically arranged at the upper position of the middle of both sides of the positioning seat, the first connecting seat positioning holes correspond to the positions of the first positioning connecting holes, second connecting seat fixing holes and limiting seat positioning holes are arranged at the rear of both sides of the positioning seat, the second connecting seat fixing holes correspond to the positions of the second positioning connecting holes, and the limiting seat positioning holes correspond to the positions of the mounting holes.

[0010] Preferably, limiting seat fixing holes and second connecting seat limiting holes are arranged at the two ends of the connecting rod, the limiting seat fixing holes correspond to the positions of the positioning connecting holes, and the second connecting seat limiting holes correspond to the positions of the second movable connecting holes.

[0011] Preferably, front connecting holes and rear connecting holes are arranged at the front and rear of both sides of the seat connecting piece, the rear connecting holes correspond to the positions of the second movable connecting holes, and the front connecting holes correspond to the positions of the first movable connecting holes.

[0012] Compared with the prior art, the automatic adjusting backrest learning chair can link the limiting seat for fixing the backrest through the seat connecting piece, realize the rotation of the limiting seat, and make the backrest always close to the back of the user through the cooperation of the linkage rod and the cylinder, so that the use of the learning chair is more comfortable. The automatic adjusting backrest learning chair is provided with a positioning seat in the seat support seat, so that the connecting seats at the front and rear of the seat connecting piece can be rotated through the positioning seat, and the reliability of the structure is ensured. When the user sits on the seat, the seat connecting piece can be driven to move downward under the action of gravity, and the backrest can be self-adaptively adjusted according to the degree of downward movement of the seat connecting piece. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is an external structure schematic view of the automatic adjusting backrest learning chair of the utility model;

[0014] Figure 2 It is a side view of the automatic adjusting backrest learning chair of the utility model;

[0015] Figure 3 The utility model discares a seat support seat and backrest fixed seat connecting structure schematic view of automatic adjusting backrest's study chair of the utility model,

[0016] Figure 4 The utility model discares a limiting seat and positioning seat and seat support seat connecting structure plan view of automatic adjusting backrest's study chair of the utility model,

[0017] Figure 5 The utility model discares a cylinder relative positioning seat position structure schematic view of automatic adjusting backrest's study chair of the utility model,

[0018] Figure 6 The utility model discares a limiting seat and connecting rod and positioning seat connecting structure schematic view of automatic adjusting backrest's study chair of the utility model,

[0019] Figure 7 The utility model discares a seat connecting piece relative positioning seat position structure schematic view of automatic adjusting backrest's study chair of the utility model,

[0020] Figure 8 The utility model discares a linkage rod structure schematic view of automatic adjusting backrest's study chair of the utility model,

[0021] Figure 9 The utility model discares a first connecting seat structure schematic view of automatic adjusting backrest's study chair of the utility model,

[0022] Figure 10 The utility model discares a limiting seat structure schematic view of automatic adjusting backrest's study chair of the utility model,

[0023] Figure 11 The utility model discares a second connecting seat structure schematic view of automatic adjusting backrest's study chair of the utility model,

[0024] Figure 12 The utility model discares a positioning seat structure schematic view of automatic adjusting backrest's study chair of the utility model,

[0025] Figure 13 The utility model discares a connecting rod structure schematic view of automatic adjusting backrest's study chair of the utility model,

[0026] Figure 14 The utility model discares a seat connecting piece structure schematic view of automatic adjusting backrest's study chair of the utility model.

[0027] In the figure: 1, backrest; 2, seat; 3, backrest fixing seat; 4, seat support seat; 5, linkage rod; 501, upper connecting hole; 502, lower connecting hole; 6, first connecting seat; 601, first positioning connecting hole; 602, first movable connecting hole; 7, limiting seat; 701, positioning connecting hole; 702, backrest fixing seat mounting hole; 703, linkage rod limiting groove; 704, connecting seat fixing hole; 705, mounting hole; 8, second connecting seat; 801, air cylinder limiting groove; 802, second movable connecting hole; 803, second positioning connecting hole; 9, air cylinder; 901, movable connecting shaft; 902, positioning connecting shaft; 10, positioning seat; 1001, first connecting seat positioning hole; 1002, air cylinder positioning hole; 1003, air cylinder movable limiting hole; 1004, second connecting seat fixing hole; 1005, limiting seat positioning hole; 11, connecting rod; 1101, limiting seat fixing hole; 1102, second connecting seat limiting hole; 12, seat connecting piece; 1201, front connecting hole; 1202, rear connecting hole. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Please refer to Figures 1-14The utility model provides a technical scheme: a learning chair of automatic regulation backrest, including backrest 1 and seat 2, backrest 1 back is equipped with backrest fixed seat 3, seat 2 bottom is equipped with seat support seat 4, seat support seat 4 top is equipped with with seat 2 connection seat connecting piece 12, and seat connecting piece 12 below front and back two sides respectively clamping have first connecting seat 6 and second connecting seat 8, first connecting seat 6 is U type structure, and first connecting seat 6 is inclined and clamped in the outside of positioning seat 10, and first connecting seat 6 both sides front and back are respectively provided with first positioning connecting hole 601 and first movable connecting hole 602, this structure can make first connecting seat 6 rotate under the positioning of positioning seat 10, and first connecting seat 6 is clamped between positioning seat 10, makes the structure stable, second connecting seat 8 is also U type structure, and second connecting seat 8 is inclined and clamped in the inside of positioning seat 10, and second connecting seat 8 both sides front and back are respectively provided with second movable connecting hole 802 and second positioning connecting hole 803, and second connecting seat 8 top is also provided with cylinder limiting groove 801 corresponding with the position of cylinder 9, this structure can make second connecting seat 8 rotate under the limiting of positioning seat 10, and second connecting seat 8 is clamped between positioning seat 10, ensures the structure stable, seat support seat 4 is equipped with the positioning seat 10 of U type structure in, and positioning seat 10 is installed with cylinder 9 in, and cylinder 9 front and back ends are respectively connected with positioning connecting shaft 902 and movable connecting shaft 901, and the both sides symmetry of positioning seat 10 rear are provided with cylinder movable limiting hole 1003 that is penetrated with movable connecting shaft 901 cooperation, and cylinder movable limiting hole 1003 is circular arc structure, and cylinder movable limiting hole 1003 is with limiting seat positioning hole 1005 as the center, and the both sides symmetry of positioning seat 10 front are provided with cylinder positioning hole 1002 that is penetrated with positioning connecting shaft 902 cooperation, so that cylinder 9 can move under the positioning of positioning seat 10, the outside of the rear of positioning seat 10 clamps the limiting seat 7 of U type design, and the back middle of limiting seat 7 is provided with linkage rod limiting groove 703 corresponding with the position of linkage rod 5, and the both sides of limiting seat 7 back are also evenly spaced provided with backrest fixed seat mounting hole 702 that is bolted with backrest fixed seat 3, and the rear position of the both sides of limiting seat 7 is provided with positioning connecting hole 701 symmetry, and the both sides of limiting seat 7 outside are also provided with the connecting rod 11 of arc structure symmetry, and lower connecting hole 502 is clamped with the one end of cylinder 9 close to movable connecting shaft 901 fastening, this structure makes linkage rod 5 can be linked with cylinder 9, thereby realizes the front and back movement and angle regulation processing of backrest fixed seat 3, limiting seat 7 makes backrest fixed seat 3 can rotate relative to positioning seat 10, and the both sides symmetry of limiting seat 7 front are respectively provided with connecting seat fixed hole 704 and mounting hole 705, and connecting seat fixed hole 704 also penetrates with movable connecting shaft 901 cooperation, and the upper position symmetry of the both sides of positioning seat 10 middle part is provided with first connecting seat positioning hole 1001, and first connecting seat positioning hole 1001 corresponds with first positioning connecting hole 601 position,The second connecting seat fixing hole 1004 and the limiting seat positioning hole 1005 are arranged on the rear sides of the positioning seat 10, the second connecting seat fixing hole 1004 corresponds to the second positioning connecting hole 803, and the limiting seat positioning hole 1005 corresponds to the mounting hole 705, so that the positioning seat 10 can be rotationally positioned on the first connecting seat 6 through the first connecting seat positioning hole 1001 and the first positioning connecting hole 601. The linkage rod 5 is arranged in the backrest fixing seat 3, the upper connecting hole 501 and the lower connecting hole 502 are arranged above and below the linkage rod 5 respectively, the linkage rod 5 is located in the seat support seat 4, the limiting seat fixing hole 1101 and the second connecting seat limiting hole 1102 are arranged at the two ends of the connecting rod 11 respectively, the limiting seat fixing hole 1101 corresponds to the positioning connecting hole 701, and the second connecting seat limiting hole 1102 corresponds to the second movable connecting hole 802, so that the limiting seat 7 and the second connecting seat 8 can be connected through the connecting rod 11, the activity of the second connecting seat 8 can drive the limiting seat 7, the front connecting hole 1201 and the rear connecting hole 1202 are arranged on the front and rear sides of the seat connecting piece 12 respectively, the rear connecting hole 1202 corresponds to the second movable connecting hole 802, and the front connecting hole 1201 corresponds to the first movable connecting hole 602, so that the seat connecting piece 12 can be fixed on the positioning seat 10 and the connecting rod 11 through the first connecting seat 6 and the second connecting seat 8 respectively, and the seat connecting piece 12 can be connected to the limiting seat 7, so that the seat connecting piece 12 can be moved downward under the action of gravity, and the first connecting seat 6 and the second connecting seat 8 are driven.

[0030] Working principle: when using the learning chair with automatic adjustment backrest, firstly, when the user sits on the seat 2, the gravity drives the seat connecting piece 12 to displace, the seat connecting piece 12 rotates relative to the first connecting seat 6 through the connection of the front connecting hole 1201 and the first movable connecting hole 602, when the first connecting seat 6 rotates, it rotates relative to the positioning seat 10 through the cooperation of the first positioning connecting hole 601 and the first connecting seat positioning hole 1001, the seat connecting piece 12 rotates relative to the connecting rod 11 through the connection of the rear connecting hole 1202 and the second movable connecting hole 802, at the same time, the second connecting seat 8 also rotates relative to the positioning seat 10 through the cooperation of the second positioning connecting hole 803 and the second connecting seat fixed hole 1004, the connecting rod 11 rotates relative to the second connecting seat 8 through the cooperation of the second connecting seat limiting hole 1102 and the second movable connecting hole 802, so that the connecting rod 11 rotates relative to the limiting seat 7 through the connection of the limiting seat fixed hole 1101 and the positioning connecting hole 701, and drives the limiting seat 7 to produce linkage, the limiting seat 7 moves relative to the positioning seat 10 under the cooperation of the connecting seat fixed hole 704 and the cylinder movable limiting hole 1003, at the same time, the limiting seat 7 is fixed with the backrest fixed seat 3 through the backrest fixed seat mounting hole 702, so that the backrest fixed seat 3 is activated, the backrest fixed seat 3 drives the linkage rod 5 to move, the linkage rod 5 connects with the movable part of the cylinder 9 through the lower connecting hole 502, so that the cylinder 9 performs telescopic movement, the movable connecting shaft 901 moves in the cylinder movable limiting hole 1003 under the cooperation of the positioning connecting shaft 902 and the cylinder positioning hole 1002, so that the backrest 1 can always be close to the back of the user, the seat supporting seat 4 is used for basic supporting and positioning, the linkage rod 5 is connected with the backrest 1 through the upper connecting hole 501, and is used for adjusting the angle of the backrest 1, the linkage rod limiting groove 703 enables the linkage rod 5 to move relative to the limiting seat 7, the mounting hole 705 is connected with the limiting seat positioning hole 1005, so that the limiting seat 7 can be rotatably positioned relative to the positioning seat 10, and the cylinder limiting groove 801 can avoid the activity of the second connecting seat 8 from hindering the cylinder 9, so that a series of work is completed.

[0031] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A study chair with an automatically adjustable backrest, comprising a backrest (1) and a seat (2), wherein the backrest (1) is provided with a backrest fixing seat (3) on its back and the seat (2) is provided with a seat support seat (4) at its bottom, characterized in that: The seat support (4) is provided with a seat connector (12) connected to the seat (2) above it, and a first connector (6) and a second connector (8) are respectively engaged on the front and rear sides below the seat connector (12). The seat support (4) is provided with a U-shaped positioning seat (10), and a cylinder (9) is installed in the positioning seat (10). The front and rear ends of the cylinder (9) are respectively connected to a positioning connecting shaft (902) and a movable connecting shaft (901). The positioning seat (10) is symmetrically provided with cylinder movable limiting holes (1003) on both rear sides, which are connected to the movable connecting shaft (901). The cylinder movable limiting holes (1003) are arc-shaped structures, and the front of the positioning seat (10) is... The cylinder positioning holes (1002) are symmetrically opened on both sides and are engaged with the positioning connecting shaft (902), so that the cylinder (9) can move under the positioning of the positioning seat (10). The positioning seat (10) is externally engaged with a U-shaped limiting seat (7) at the rear. The limiting seat (7) is symmetrically opened with a connecting seat fixing hole (704) and a mounting hole (705) on both sides in front. The connecting seat fixing hole (704) is also engaged with the movable connecting shaft (901). The backrest fixing seat (3) is provided with a linkage rod (5). The linkage rod (5) is provided with an upper connecting hole (501) and a lower connecting hole (502) at the top and bottom. The lower part of the linkage rod (5) is located in the seat support seat (4).

2. The study chair with an automatically adjustable backrest according to claim 1, characterized in that: The first connecting seat (6) has a U-shaped structure and is tilted and locked outside the positioning seat (10). The first positioning connecting hole (601) and the first movable connecting hole (602) are respectively opened on the front and back sides of the first connecting seat (6).

3. A study chair with an automatically adjustable backrest according to claim 2, characterized in that: The back of the limiting seat (7) has a linkage rod limiting groove (703) corresponding to the position of the linkage rod (5) in the middle of its back. The back of the limiting seat (7) also has evenly spaced backrest fixing seat mounting holes (702) for bolt fixing to the backrest fixing seat (3). The back of the limiting seat (7) has symmetrically spaced positioning connection holes (701) at the rear of both sides. The outer sides of the limiting seat (7) also have symmetrically spaced arc-shaped connecting rods (11). The lower connection hole (502) is fastened to the end of the cylinder (9) near the movable connecting shaft (901).

4. A study chair with an automatically adjustable backrest according to claim 3, characterized in that: The second connecting seat (8) is also a U-shaped structure, and the second connecting seat (8) is tilted and locked inside the positioning seat (10). The front and rear sides of the second connecting seat (8) are respectively provided with a second movable connecting hole (802) and a second positioning connecting hole (803), and a cylinder limiting groove (801) corresponding to the position of the cylinder (9) is also provided on the top of the second connecting seat (8).

5. A study chair with an automatically adjustable backrest according to claim 4, characterized in that: The positioning seat (10) has symmetrically arranged first connecting seat positioning holes (1001) at the upper position of the middle of both sides, and the first connecting seat positioning holes (1001) correspond to the first positioning connecting holes (601). The positioning seat (10) has second connecting seat fixing holes (1004) and limit seat positioning holes (1005) on both rear sides, and the second connecting seat fixing holes (1004) correspond to the second positioning connecting holes (803), and the limit seat positioning holes (1005) correspond to the mounting holes (705).

6. A study chair with an automatically adjustable backrest according to claim 5, characterized in that: The connecting rod (11) has a limiting seat fixing hole (1101) and a second connecting seat limiting hole (1102) at both ends, and the limiting seat fixing hole (1101) corresponds to the positioning connecting hole (701), and the second connecting seat limiting hole (1102) corresponds to the second movable connecting hole (802).

7. A study chair with an automatically adjustable backrest according to claim 6, characterized in that: The seat connector (12) has a front connecting hole (1201) and a rear connecting hole (1202) on its front and rear sides respectively. The rear connecting hole (1202) corresponds to the second movable connecting hole (802), and the front connecting hole (1201) corresponds to the first movable connecting hole (602).

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