Student desk and chair convenient to adjust

Abstract

The utility model relates to a student desk and chair convenient to adjust, which comprises a chair frame main body, a back frame is arranged on the chair frame main body, a backrest is connected onto the back frame, and two or more through holes are arranged on the back frame along the height direction. The backrest is located on the front side of the back frame and correspondingly extends to form a plurality of first connecting columns which are inserted into the back frame through the through holes; the rear cover is located on the rear side of the back frame, a plurality of second connecting columns which are inserted into the back frame through the through holes correspondingly extend from the rear cover, and fasteners sequentially penetrate through the second connecting columns and the first connecting columns, so that the backrest is assembled and connected to the back frame and can be adjusted up and down; the student desk and chair is simple in structure and convenient to assemble and disassemble, the height of the backrest can be adjusted up and down according to needs, the student desk and chair can adapt to the heights of different students, comfort is improved, and the problem that an existing student chair cannot be adjusted according to the height of the student is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to student desk and chair field, concretely is a student desk and chair of convenient adjustment. BACKGROUND

[0002] When students learn in school, they usually need to learn in the classroom, and often need to use desk and chair. At present, the existing desk and chair, such as Chinese patent literature number CN219229327U, discloses a multifunctional desk and chair for students on February 9, 2023. The desk and chair unit includes desk legs, seat legs, a desk, a seat, a backrest, a flexible pad, a fixing assembly and a positioning assembly. In the prior art, the seat legs can be telescoped up and down to adjust the height of the seat, backrest and flexible pad to adapt to the height requirements of different students, but it is only applicable to the legs of students, and different heights will also be reflected in the length, so the backrest fixed on the seat cannot be adjusted, which will cause some students to be uncomfortable, and therefore the current student desk and chair needs to be further improved. SUMMARY

[0003] The utility model aims at solving the above-mentioned problems of the prior art, and provides a student desk and chair with simple and reasonable structure and convenient adjustment.

[0004] The student desk and chair with convenient adjustment comprises a chair frame body, a back frame is arranged on the chair frame body, a backrest is connected to the back frame, two or more through holes are formed in the back frame along the height direction, the backrest is located on the front side of the back frame and corresponds to extend a plurality of first connecting columns inserted into the back frame through the through holes, and a rear cover is further arranged, the rear cover is located on the rear side of the back frame and corresponds to extend a plurality of second connecting columns inserted into the back frame through the through holes, and a fastener is sequentially inserted through the second connecting column and the first connecting column to assemble and connect the backrest on the back frame and realize the up-down adjustment.

[0005] The utility model can also be solved by the following technical measures:

[0006] As a more specific scheme, a threaded hole is formed in the first connecting column, a through hole is formed in one end of the second connecting column corresponding to the threaded hole, and an installation opening connected with the through hole is arranged at the other end of the second connecting column; the fastener is a bolt, the bolt is inserted into the second connecting column through the installation opening, and sequentially passes through the through hole and the threaded hole to realize fastening.

[0007] As a further scheme, a rear cover fence matching the shape of the rear cover is extended on the back of the backrest, the rear cover fence and the rear cover are combined to limit the back shell, and the upper part of the back frame is assembled and connected in the back shell.

[0008] As a further scheme, a plurality of buckling protrusions are arranged on the inner side wall surface of the rear cover apron, and a plurality of elastic reverse buckles corresponding to the number of the buckling protrusions are extended on the back surface of the rear cover, and the rear cover is engaged with the rear cover apron through cooperation of the elastic reverse buckles and the buckling protrusions.

[0009] As a further scheme, an annular shell abutting or adjacent to the rear cover is extended on the back surface of the backrest, a cavity is formed in the annular shell, and an opening is arranged in the lower half of the cavity on the rear cover, so that a handle is formed between the rear cover and the annular shell through the opening.

[0010] As a further scheme, the end of the second connecting column is arranged in abutment with the end of the first connecting column in the back frame.

[0011] As a further scheme, the back frame comprises two backrest tubes arranged on the left side and the right side, and a plurality of reinforcing plates are extended on the back surface of the backrest and the rear cover, and support plates abutting against the inner sides of the backrest tubes are arranged on the reinforcing plates, and spaces for independently limiting each backrest tube are enclosed between the support plates and the rear cover apron.

[0012] As a further scheme, the back frame comprises two backrest tubes arranged on the left side and the right side, and the chair frame body comprises at least a foot support horizontal tube and two support vertical tubes connected at the middle position of the foot support horizontal tube, and the two backrest tubes are respectively inserted into the upper sides of the two support vertical tubes.

[0013] As a further scheme, the bottom of each of the two support vertical tubes is provided with a penetrating interface matching the cross-sectional shape of the foot support horizontal tube, the foot support horizontal tube is inserted into the two penetrating interfaces and connected with the two support vertical tubes through welding.

[0014] As a further scheme, the foot support horizontal tube is composed of a left side tube segment, a right side tube segment and a middle tube segment, the left side tube segment and the right side tube segment are respectively welded to the outer sides of the two support vertical tubes, and the middle tube segment is welded between the two support vertical tubes.

[0015] The beneficial effects of the utility model are as follows:

[0016] The student desk and chair convenient to adjust has the advantages that the student desk and chair are simple in structure, convenient to assemble and disassemble, can adjust the height of the backrest up and down according to needs, adapt to the heights of different students, improve comfort, solve the problem that the existing student seat cannot be adjusted according to the height of the student, and after the backrest is fastened and locked, the connection is firm and will not loosen, and no abnormal sound is generated when the student leans back. DRAWINGS

[0017] Figure 1 It is a structural schematic view of one embodiment in the utility model.

[0018] Figure 2The longitudinal section structure schematic view of the back frame in the utility model.

[0019] Figure 3 The decomposition structure schematic view of the back frame in the utility model.

[0020] Figure 4 The back cover structure schematic view in the utility model.

[0021] Figure 5 The transverse section structure schematic view of the back frame in the utility model.

[0022] Figure 6 The structure schematic view of the desk and chair in another angle in the utility model.

[0023] Figure 7 The structure schematic view of the cross pipe and the supporting vertical pipe production mode one in the utility model.

[0024] Figure 8 The structure schematic view of the cross pipe and the supporting vertical pipe production mode two in the utility model. Specific embodiments

[0025] The utility model is further illustrated below in combination with the drawings and embodiments.

[0026] Referring to Figures 1 to 5 The utility model discloses a desk and chair, which comprises a chair frame body 1, a back frame 2 is arranged on the chair frame body 1, a backrest 3 is connected to the back frame 2, two or more than two through holes 201 are formed on the back frame 2 along the height direction, the backrest 3 is located on the front side of the back frame 2 and corresponds to extend a plurality of first connecting columns 4 inserted into the back frame 2 through the through holes 201, and a back cover 5 is located on the back side of the back frame 2 and corresponds to extend a plurality of second connecting columns 6 inserted into the back frame 2 through the through holes 201, the backrest 3 is assembled and connected on the back frame 2 through the fasteners sequentially penetrating the second connecting columns 6 and the first connecting columns 4, and the up-down adjustment is realized.

[0027] In the embodiment, the back frame 2 is provided with three through holes 201 of different heights, the backrest 3 extends two first connecting columns 4, the first connecting columns 4 are provided with threaded holes 401, the back cover 5 extends a second connecting column 6, one end of the second connecting column 6 is provided with a via hole 601 corresponding to the threaded hole 401, the other end of the second connecting column 6 is provided with a mounting hole 602 connected with the via hole 601; the fastener is a bolt 71, the bolt 71 is an internal hexagonal bolt, when the height is adjusted, the bolt 71 is loosened, the two first connecting columns 4 on the backrest 3 are first inserted into two through holes 201 in the back frame 2 to change the height of the backrest 3, then the back cover 5 is installed at the mounting position of the backrest 3, so that the second connecting column 6 of the back cover 5 is inserted into the through hole 201 and cooperates with only one first connecting column 4, finally the bolt 71 is inserted into the second connecting column 6 through the mounting hole 602 and sequentially passes through the via hole 601 and the threaded hole 401 to realize fastening.

[0028] The student desk and chair has simple structure and is convenient to assemble and disassemble, the height of the backrest 3 can be adjusted up and down according to needs, the height of different students can be adapted, the comfort is improved, and the problem that the existing student seat cannot be adjusted according to the height of the student is solved, and after the backrest 3 is fastened and locked, the connection is firm and will not be loose, and when the student leans back, no abnormal sound will be generated.

[0029] Moreover, the back surface of the backrest 3 extends a back cover coaming 31 matching the shape of the back cover 5, the back cover coaming 31 and the back cover 5 jointly enclose and limit a back shell 7, and the upper part of the back frame 2 is assembled and connected in the back shell 7; the structure hides the upper part of the back frame 2 and the connecting column and other structural parts in the back shell 7, compared with the exposed design of the traditional desk and chair, the back surface of the backrest 3 is more regular and simple, and the appearance of the desk and chair is improved.

[0030] The inner side wall surface of the back cover coaming 31 is provided with a plurality of buckling protrusions 32, the back surface of the back cover 5 extends a plurality of elastic reverse buckles 51 corresponding to the number of the buckling protrusions 32, the back cover 5 and the back cover coaming 31 are connected through the cooperation of the elastic reverse buckles 51 and the buckling protrusions 32; after the back cover 5 is fastened and connected on the back frame 2, the cooperation of the buckling protrusions 32 and the elastic reverse buckles 51 is used to better connect the edge of the back cover 5 with the back cover coaming 31, reduce the gap between the two, and the connection is more firm and will not be loose.

[0031] The back of the backrest 3 extends a ring-shaped shell 33 abutting or adjacent to the rear cover 5, a cavity 321 is formed in the ring-shaped shell 33, and a lower half of the cavity 321 is provided with an opening 52 in the rear cover 5. The opening 52 forms a handle 8 between the rear cover 5 and the ring-shaped shell 33. This structure can form a hidden handle, so that the handle 8 is integrated into the back shell 7, and the handle 8 does not need to be separately installed and arranged. Moreover, the handle 8 is arranged at this position, so that students can easily put and take the desk and chair.

[0032] The end of the second connecting column 6 abuts the end of the first connecting column 4 in the back frame 2. During locking, the second connecting column 6 abuts the first connecting column 4, which serves as a limiting function, so that the second connecting column 6 or the first connecting column 4 will not be pulled out when the fastener is fastened.

[0033] The back frame 2 includes two backrest pipes 21 arranged on the left side and the right side. The back of the backrest 3 and the rear cover 5 each extends a plurality of reinforcing plates 9, and the reinforcing plates 9 are provided with support plates 91 abutting the inner sides of the backrest pipes 21. The support plates 91 are adapted to the surface shape of the backrest pipes 21, and the support plates 91 and the rear cover coexist with the surrounding plates 31 to enclose a space X for limiting each backrest pipe 21.

[0034] The reinforcing plates 9 can improve the strength of the backrest 3 and the rear cover 5, and are not easily deformed after being fastened or leaned on. On the other hand, the two backrest pipes 21 can be fixed in the respective spaces X, so that the two backrest pipes 21 will not be pulled together, which helps the second connecting column 6 and the first connecting column 4 to be aligned with the through hole 201, thereby improving the assembly efficiency.

[0035] In the embodiment, referring to Figure 6 The chair frame body 1 at least includes a footrest cross pipe 11 and two support vertical pipes 12 connected at the middle position of the footrest cross pipe 11. The two backrest pipes 21 are respectively inserted into the upper sides of the two support vertical pipes 12. This structure can improve the visual effect of the appearance.

[0036] In addition, the two ends of the footrest cross pipe 11 are respectively connected with bottom beams 13. The footrest cross pipe 11, the two support vertical pipes 12, and the two bottom beams 13 form the footrest part of the student desk and chair. The lower part of the backrest pipe 21 is further connected with a seat frame 14, and the upper side of the seat frame 14 is connected with a seat plate 15.

[0037] Production mode of the footrest cross pipe 11 and the two support vertical pipes 12:

[0038] Specific production mode one: referring to Figure 7As shown, the bottom of the two support vertical pipes 12 is provided with a penetrating interface 121 matching the cross section shape of the horizontal pipe 11 of the support frame, the horizontal pipe 11 is inserted into the two penetrating interfaces 121 and connected with the two support vertical pipes 12 by welding, and the production mode can make the appearance more complete.

[0039] Specific production mode two: refer to Figure 8 As shown, the horizontal pipe 11 of the support frame is composed of a left pipe segment 111, a right pipe segment 112 and a middle pipe segment 113, the left pipe segment 111 and the right pipe segment 112 are welded on the outer side of the two support vertical pipes 12, and the middle pipe segment 113 is welded between the two support vertical pipes 12, and the production mode can help mass production, the process is simple, and the production cost is low.

[0040] The above is the preferred scheme of the utility model, the basic principle, the main features and the advantages of the utility model are displayed and described. Those skilled in the art should understand that the utility model is not limited to the above examples, the above examples and the description in the specification are only to illustrate the principle of the utility model, and the utility model can have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the appended claims and equivalents.

Claims

1. An adjustable student desk and chair, comprising a chair frame body (1), wherein a backrest (2) is provided on the chair frame body (1), and a backrest (3) is connected to the backrest (2), characterized in that: The back frame (2) has two or more through holes (201) along the height direction. The backrest (3) is located on the front side of the back frame (2) and has several first connecting posts (4) that are inserted into the back frame (2) through the through holes (201). It also includes a back cover (5), which is located on the back side of the back frame (2) and has several second connecting posts (6) that are inserted into the back frame (2) through the through holes (201). Fasteners are used to pass through the second connecting posts (6) and the first connecting posts (4) in sequence, so that the backrest (3) is assembled and connected to the back frame (2) and can be adjusted up and down.

2. The student desk and chair that is easy to adjust according to claim 1, characterized in that: The first connecting post (4) has a threaded hole (401) inside. One end of the second connecting post (6) has a through hole (601) corresponding to the threaded hole (401). The other end of the second connecting post (6) has an installation port (602) connecting the through hole (601). The fastener is a bolt (71). The bolt (71) extends into the second connecting post (6) through the installation port (602) and passes through the through hole (601) and the threaded hole (401) in sequence to achieve fastening.

3. The student desk and chair that is easy to adjust according to claim 1, characterized in that: The backrest (3) extends to the back of a matching back cover (5) with a back cover panel (31). The back cover panel (31) and the back cover (5) enclose and limit the back shell (7). The upper part of the back frame (2) is assembled and connected inside the back shell (7).

4. The student desk and chair that is easy to adjust according to claim 3, characterized in that: The inner wall of the rear cover panel (31) is provided with a plurality of fastening protrusions (32), and the back of the rear cover (5) extends with a plurality of elastic buckles (51) corresponding to the number of fastening protrusions (32). The rear cover (5) and the rear cover panel (31) are joined by the cooperation of the elastic buckles (51) and the fastening protrusions (32).

5. The student desk and chair that is easy to adjust according to claim 1 or 3, characterized in that: The backrest (3) extends to the back of the backrest (3) and has an annular shell (33) that abuts against or is adjacent to the back cover (5). The annular shell (33) forms a cavity (321). The back cover (5) has an opening (52) corresponding to the lower half of the cavity (321). The opening (52) forms a handle (8) between the back cover (5) and the annular shell (33).

6. The student desk and chair that is easy to adjust according to claim 1, characterized in that: The end of the second connecting column (6) and the end of the first connecting column (4) are abutted against each other inside the back frame (2).

7. The student desk and chair that is easy to adjust according to claim 3, characterized in that: The back frame (2) includes two backrest tubes (21) arranged on the left and right sides; the back of the backrest (3) and the back cover (5) are extended with several reinforcing plates (9), and the reinforcing plates (9) are provided with support plates (91) that abut against the inside of the backrest tubes (21). The support plates (91) and the back cover panel (31) enclose a space (X) that independently limits each backrest tube (21).

8. The student desk and chair that is easy to adjust according to claim 1, characterized in that: The backrest (2) includes two backrest tubes (21) arranged on the left and right sides; the chair frame body (1) includes at least a leg cross tube (11) and two support vertical tubes (12) connected in the middle of the leg cross tube (11), and the two backrest tubes (21) are respectively inserted into the upper side of the two support vertical tubes (12).

9. The student desk and chair that is easy to adjust according to claim 8, characterized in that: The bottom of each of the two support vertical tubes (12) is provided with a through-hole (121) that matches the cross-sectional shape of the leg horizontal tube (11). The leg horizontal tube (11) is inserted into the two through-holes (121) and is connected to the two support vertical tubes (12) by welding.

10. The student desk and chair that is easy to adjust according to claim 8, characterized in that: The horizontal tube (11) of the tripod consists of a left tube section (111), a right tube section (112) and a middle tube section (113). The left tube section (111) and the right tube section (112) are respectively welded to the outside of the two supporting vertical tubes (12), and the middle tube section (113) is welded between the two supporting vertical tubes (12).

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