CN216454278U

CN216454278U - Adjustable locking structure of seat support of children's study chair

Info

Publication number: CN216454278U
Application number: CN202122307271.XU
Authority: CN
Inventors: 童慧春; 陈建军; 胡军; 张伟锋; 周金坤
Original assignee: Global Furniture Zhejiang Co Ltd
Current assignee: Global Furniture Zhejiang Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-05-10
Anticipated expiration: 2031-09-23

Abstract

The utility model relates to the technical field of seats, and discloses an adjustable locking structure of a seat of a child learning chair. The inner clamping sleeve is reliably fastened on the inner clamping sleeve through the deformation pressing of the inner clamping sleeve, the tightness of the inner clamping sleeve is realized through different adjustment of the distances between the locking surface and the hinge shaft of the continuous molding surface and the loose surface which are integrally molded, and the locking surface and the loose surface are designed into the continuous surface, so that the tightness process can be completed through rotation, and the inner clamping sleeve is simple and reliable and does not need tools to position.

Description

Adjustable locking structure of seat support of children's study chair

Technical Field

The utility model relates to the technical field of seats, in particular to an adjustable locking structure of a seat of a child learning chair.

Background

In the existing child seat, the cushion is usually fixed on the support rod member by bolts, or fixed by making one end of the bolt abut against the support rod, and the fixed position is adjusted by tightening or loosening the bolts, however, it is very inconvenient to disassemble the above prior art by using a tool of a specific specification such as a screwdriver, moreover, children are difficult to operate independently, frequent disassembly easily causes thread deformation, which causes the problem that the threads cannot be screwed together and reduces the service life of the product, in addition, the fastening relationship between the bolt and the support rod is very unstable, and the support rod is easy to deform, moreover, the prior adjusting and fastening structure has no safety device, when a user breaks away from the supporting chair of the chair to slide down along the supporting rod quickly in the process of adjusting the height, the user is easy to be injured by crashing, and the chair seat adjustable locking structure of the child learning chair is provided for improving in view of the defects.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: to overcome the problems described above, an adjustable locking device for a back of a child's chair is provided that solves the above-mentioned problems.

The technical problem to be solved by the utility model is realized by adopting the following technical scheme:

the utility model provides an adjustable locking device of back of chair of children's study chair, includes seat support, gliding mass, chair pole, the one end of gliding mass is fixed in the lower terminal surface of seat support, the vertical interval of an end surface on the chair pole is equipped with insurance location jack, be equipped with pressfitting formula locking Assembly on the chair pole, pressfitting formula locking Assembly includes the inner jacket, the inner jacket is the barrel that has the breach, the inner jacket suit in on the chair pole, the right-hand member longitudinal symmetry of inner jacket is equipped with the inner jacket trepanning, the other end cartridge of gliding mass is fixed in the left end of inner jacket, the set up subassembly of the adjustable length of closing that has installed the ratchet pole or has the auto-lock is installed in the inner jacket trepanning.

Preferably, a spring safety plug assembly is arranged in the press-fit type locking assembly, the spring safety plug assembly comprises a fixed seat fixedly connected to the left end face of the inner jacket through screws, a lifting bolt with a flange in the middle, a spring, a push block and an inclined plane pressing piece, a square stepped hole which is through up and down is arranged at one end of the fixed seat close to the seat, a circular stepped hole which penetrates through the fixed seat from left to right and is coaxial with the safety positioning jack is horizontally arranged in the middle of the fixed seat, the spring is sleeved on the lifting bolt, the right end of the spring abuts against the flange on the lifting bolt, the lifting bolt is inserted in the circular stepped hole, one end of the lifting bolt, far away from the fixed seat, is inserted in the safety positioning jack, the lower end of the push block is inserted in the square stepped hole and extends downwards, and a second inclined plane is arranged on the upper end face of the push block, the upper end of the push block is provided with a U-shaped notch, a first inclined plane parallel to the second inclined plane is integrally formed on the inclined plane pressing piece, the second inclined plane abuts against the first inclined plane, the middle part of the first inclined plane is provided with a dismounting hole coaxial with the lifting bolt, one end of the lifting bolt close to the fixing seat is inserted into the dismounting hole in the first inclined plane, and the horizontal movement stroke distance of the first inclined plane is larger than the depth of the safety positioning jack.

Preferably, the inner jacket sleeve is sleeved with a sliding body shell, one end of the sliding body shell, which is far away from the seat, is provided with sliding body shell holes corresponding to the inner jacket sleeve holes in an up-down symmetrical manner, and the bolt, the screw, the ratchet rod or the self-locking component capable of adjusting the screwing length simultaneously penetrates through the inner jacket sleeve holes and the sliding body shell holes to be fixed.

Preferably, a button is inserted into the lower side of the sliding body shell, the button is a shell with an upward opening, and a dismounting bolt is screwed between the button and the lower end of the push block.

Preferably, the fastening assembly comprises a U-shaped connecting piece, a wrench bolt and a locking wrench, the front bending end of the U-shaped connecting piece is provided with a through hole, the front end bending part of the U-shaped connecting piece passes through the inner jacket hole, one end of the locking wrench is provided with a hinge hole, the locking wrench is clamped on the U-shaped connecting piece, the hinge hole on the locking spanner is coaxial with the through hole on the U-shaped connecting piece, the spanner bolt is inserted in the hinge hole and the through hole, one end of the locking wrench, which is close to the hinge hole, is provided with a locking surface and a loosening surface, the distance from the locking surface to the axis of the hinge hole is greater than the distance from the loosening surface to the axis of the hinge hole, and an arc transition surface is arranged between the locking surface and the loosening surface, and the locking surface is abutted against a plane on which a sliding body shell hole is arranged on the sliding body shell.

Preferably, a sliding body sound insulation sheet is arranged between the chair rod and the inner wall of the inner jacket, the perimeter of the horizontal section of the sliding body sound insulation sheet is not lower than two thirds of the perimeter of the horizontal section of the chair rod, and the outer side face of the sliding body sound insulation sheet is abutted against the inner side face of the sliding body shell.

Preferably, the sliding body sound insulation sheet is made of rubber or silica gel or plastic.

Preferably, the same end face of the chair rod and the same end face of the safety positioning jack are fixedly provided with a raised limiting column, and the limiting column is positioned at the lower side of the safety positioning jack.

The utility model has the advantages and positive effects that: the inner jacket is reliably fastened through the deformation pressing of the inner jacket, the tightness of the inner jacket is realized through the different adjustment of the distances between the locking surface and the loosening surface of the continuously formed surface and the articulated shaft which are integrally formed, the locking surface and the loosening surface are designed into continuous surfaces, so the tightening process can be finished through rotation, the locking surface and the loosening surface are simple and reliable, no tool is needed for positioning, the locking surface and the loosening surface are very suitable for children to operate, in addition, the inner wall of the inner jacket is protected in the process of adjusting the upper position and the lower position by additionally arranging a flexible material, the noise is reduced while the rigid friction and the collision are avoided, in addition, the positioning protection is carried out in the process of moving up and down through the spring safety inserted column assembly, when the fastening assembly is loosened and a user loses control over the chair, the lifting bolt is quickly inserted into the nearest safety positioning insertion hole under the action of the fastening assembly, so that the potential safety hazards that feet are injured by quick sliding of the chair are avoided.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic illustration of an explosive structure according to the present invention;

FIG. 2 is a schematic view of the overall cross-sectional configuration of the present invention;

FIG. 3 is a schematic view of the assembled structure of the present invention;

FIG. 4 is a perspective view of the chair rod of FIG. 1;

FIG. 5 is a schematic diagram of the exploded structure at A in FIG. 1;

figure 6 is a schematic view of the assembled structure of the fastening assembly of figure 1;

FIG. 7 is a schematic view of the locking wrench of FIG. 6 in a tightened state;

FIG. 8 is a schematic view of the locking wrench of FIG. 6 in a relaxed state.

The scores in the figures are as follows: 1. a chair seat; 2. a slider; 3. a chair rod; 4. a slider housing; 5. a sliding body sound-proof sheet; 6. locking the wrench; 7. a wrench bolt; 8. a U-shaped connector; 9. a spring; 10. a lifting bolt; 11. a fixed seat; 13. a bevel press; 14. a push block; 15. a button; 16. a press-fit type locking assembly; 17. a spring safety post assembly; 18. a safety positioning jack; 19. a limiting column; 20. an inner jacket; 21. an inner jacket hole; 22. a slider housing bore; 23. disassembling and assembling the bolt; 24. a first inclined plane; 25. a second inclined plane; 26. a locking surface; 27. loosening the surface; 28. a fastening assembly; 29. a hinge hole; 30. a square stepped hole; 31. a circular stepped bore.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

The embodiments of the utility model will be described in further detail below with reference to the accompanying drawings:

as shown in fig. 1-8, the adjustable locking device for a chair back of a child learning chair according to the present invention comprises a chair seat 1, a sliding body 2, and a chair rod 3, wherein one end of the sliding body 2 is fixed on a lower end surface of the chair seat 1, one end surface of the chair rod 3 is vertically provided with a safety positioning insertion hole 18 at intervals, the chair rod 3 is provided with a press-fit type locking assembly 16, the press-fit type locking assembly 16 comprises an inner jacket 20, the inner jacket 20 is a cylinder with a notch, the inner jacket 20 is sleeved on the chair rod 3, the right end of the inner jacket 20 is vertically and symmetrically provided with inner jacket holes 21, the other end of the sliding body 2 is inserted and fixed on a left end of the inner jacket 20, a ratchet rod or a self-locking fastening assembly 28 with an adjustable abutting length is inserted into the inner jacket hole 21,

preferably, a spring safety plunger assembly 17 is arranged in the press-fit locking assembly 16, the spring safety plunger assembly 17 includes a fixing seat 11 fixed to the left end surface of the inner jacket 20 by screws, a lifting pin 10 with a flange at the middle part, a spring 9, a push block 14, and an inclined plane pressing member 13, one end of the fixing seat 11 close to the seat 1 is provided with a square stepped hole 30 penetrating up and down, the middle part of the fixing seat 11 is horizontally provided with a circular stepped hole 31 penetrating left and right and coaxial with the safety positioning jack 18, the spring 9 is sleeved on the lifting pin 10, the right end of the spring 9 abuts against the flange on the lifting pin 10, the lifting pin 10 is inserted in the circular stepped hole 31, one end of the lifting pin 10 far from the fixing seat 11 is inserted in the safety positioning jack 18, the lower end of the push block 14 is inserted in the square stepped hole 30 and extends downward, a second inclined plane 25 is arranged on the upper end face of the push block 14, a U-shaped notch is arranged at the upper end of the push block 14, a first inclined plane 24 parallel to the second inclined plane 25 is integrally formed on the inclined plane pressing piece 13, the second inclined plane 25 abuts against the first inclined plane 24, a dismounting hole coaxial with the lifting bolt 10 is arranged in the middle of the first inclined plane 24, one end, close to the fixed seat 11, of the lifting bolt 10 is inserted into the dismounting hole in the first inclined plane 24, and the horizontal moving stroke distance of the first inclined plane 24 is greater than the depth of the safety positioning jack 18;

it should be understood that the inclined pressing member 13 has potential energy moving obliquely upward under the guiding action of the first inclined surface 24 under the elastic force of the spring 9, but since the horizontal height position of the inclined pressing member 13 is limited by the lifting latch 10, the pushing block 14 has potential energy moving obliquely downwards under the action of the reaction force, so that one end of the lifting bolt 10 close to the chair rod 3 is inserted into the safety positioning insertion hole 18 under the action of no external force, after an upward force is applied to the lower end of the push block 14, the inclined plane pressing piece 13 drives the lifting bolt 10 to overcome the elastic potential energy of the spring 9 and move towards the direction far away from the chair rod 3, and finally the lifting bolt 10 is separated from the safety positioning jack 18, so that the safety can be disabled, when the external force is eliminated, the lifting bolt 10 is inserted into the safety positioning jack 18 again by the elastic potential energy of the spring 9.

Preferably, the inner jacket 20 is externally sleeved with a sliding body shell 4, one end of the sliding body shell 4, which is far away from the seat 1, is provided with sliding body shell holes 22 corresponding to the inner jacket holes 21 in an up-down symmetrical manner, and the bolt, the screw, the ratchet rod or the self-locking component with the adjustable screwing length simultaneously penetrates through the inner jacket holes 21 and the sliding body shell holes 22 to be fixed;

it should be understood that in the actual adjusting process, the bolt, the screw, the ratchet rod or the self-locking component capable of adjusting the screwing length is loosened to keep the gap between the inner jacket 20 and the chair rod 3, and then the distance of the inner jacket 20 is adjusted up and down, but in actual use, the gap is limited, the inner jacket 20 needs to be held to smoothly adjust the height, but the gap between the inner jacket 20 and the chair rod 3 has potential safety hazards such as finger clamping in the adjustment, the potential safety hazards can be avoided by sleeving the sliding body shell 4 on the outer portion of the inner jacket 20, and meanwhile, the situation that the inner jacket 20 is not pressed in place due to sundries can be avoided.

Preferably, a button 15 is inserted into the lower side of the sliding body shell 4, the button 15 is a shell with an upward opening, and a dismounting bolt 23 is screwed between the button 15 and the lower end of the push block 14;

it should be understood that, by sleeving the button 15 below the slider housing 4, the button 15 and the slider housing 4 form a press-fit type shell to effectively protect the internal components of the spring safety plunger assembly 17, so as to prevent impurities from falling into the shell to cause damage, and also prevent potential safety hazards caused by mistaken touch of a user during adjustment.

Preferably, the fastening assembly 28 includes a U-shaped connecting member 8, a wrench plug 7, and a locking wrench 6, a through hole is formed at a front bent end of the U-shaped connecting member 8, a front bent portion of the U-shaped connecting member 8 passes through the inner jacket hole 21, a hinge hole 29 is formed at one end of the locking wrench 6, the locking wrench 6 is fastened to the U-shaped connecting member 8, the hinge hole 29 of the locking wrench 6 is coaxial with the through hole of the U-shaped connecting member 8, the wrench plug 7 is inserted into the hinge hole 29 and the through hole, a locking surface 26 and a loosening surface 27 are formed at one end of the locking wrench 6 close to the hinge hole 29, a distance from the locking surface 26 to an axis of the hinge hole 29 is greater than a distance from the loosening surface 27 to an axis of the hinge hole 29, and an arc transition surface is formed between the locking surface 26 and the loosening surface 27, the locking surface 26 abuts against the plane of the slider housing hole 22 on the slider housing 4;

it should be understood that when the locking surface 26 abuts against the plane of the slider housing hole 22 on the slider housing 4, the slider housing 4 is in a fastened state, and the end far away from the hinge hole 29 is broken to rotate the lock wrench 6 around the hinge hole 29, so that the loosening surface 27 abuts against the plane of the slider housing hole 22 on the slider housing 4, and the distance from the hinge hole 29 to the slider housing 4 is shortened after rotation, so that the U-shaped connecting member 8 retracts, and finally the gap is formed between the inner surface of the slider sound-insulating sheet 5 and the outer surface of the chair rod 3, and the loosening is completed.

Preferably, a sliding body sound insulation sheet 5 is arranged between the chair rod 3 and the inner wall of the inner jacket 20, the perimeter of the horizontal section of the sliding body sound insulation sheet 5 is not lower than two thirds of the perimeter of the horizontal section of the chair rod 3, and the outer side surface of the sliding body sound insulation sheet 5 is abutted against the inner side surface of the sliding body shell 4.

Preferably, the sliding body sound insulation sheet 5 is made of rubber or silica gel or plastic.

Preferably, a raised limit column 19 is fixedly arranged on the same end surface of the chair rod 3 as the safety positioning jack 18, and the limit column 19 is positioned at the lower side of the safety positioning jack 18;

it should be understood that the limiting column 19 can prevent the chair from sliding rapidly when the supporting force is lost, so that the lower end surface of the chair seat 1 can injure the user, or the chair can be damaged.

In specific implementation, the locking wrench 6 is rotated around the hinge hole 29 by breaking one end of the locking wrench 6 far away from the hinge hole 29, so that the loose surface 27 abuts against the plane on which the slider housing hole 22 is arranged on the slider housing 4, the distance from the hinge hole 29 to the slider housing 4 is shortened after the rotation, so that the U-shaped connecting member 8 retracts, and finally a gap is formed between the inner surface of the slider sound-insulating sheet 5 and the outer surface of the chair rod 3, so as to complete the relaxation, and then an upward force is applied to the lower end of the button 15, so that the inclined plane pressing member 13 drives the lifting bolt 10 to overcome the elastic potential energy of the spring 9 and move in the direction far away from the chair rod 3, and finally the lifting bolt 10 is separated from the safety positioning jack 18, after the outside of the slider housing 4 is held to move up and down to adjust a proper height, the button 15 is firstly released, and one end of the lifting bolt 10 is ensured to be inserted into the safety positioning jack 18, then, the locking wrench 6 is reversely pulled to make the locking surface 26 abut against the sliding body housing 4, and the distance from the locking surface 26 to the hinge hole 29 is increased to make the inner jacket 20 contract and deform to complete the fastening and pressing of the outer part of the chair rod 3 to form reliable fixing.

It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but other embodiments derived from the technical solutions of the present invention by those skilled in the art are also within the scope of the present invention.

Claims

1. The utility model provides an adjustable locking structure of seat support of children's study chair, includes seat support (1), gliding mass (2), chair pole (3), its characterized in that: one end of the sliding body (2) is fixed on the lower end face of the seat (1), one end face of the chair rod (3) is vertically provided with safety positioning insertion holes (18) at intervals, the chair rod (3) is provided with a press-fit type locking assembly (16), the press-fit type locking assembly (16) comprises an inner jacket (20), the inner jacket (20) is a barrel with a gap, the inner jacket (20) is sleeved on the chair rod (3), inner jacket holes (21) are symmetrically formed in the upper end and the lower end of the right end of the inner jacket (20), the other end of the sliding body (2) is fixedly inserted at the left end of the inner jacket (20), and a ratchet rod or a fastening assembly (28) with self-locking and adjustable abutting length is inserted in the inner jacket hole (21).

2. The adjustable locking structure of a chair seat of a children's learning chair according to claim 1, characterized in that: the safety lock is characterized in that a spring safety plug column assembly (17) is arranged in the press-fit type locking assembly (16), the spring safety plug column assembly (17) comprises a fixing seat (11) fixedly connected to the left end face of the inner jacket (20) through screws, a lifting bolt (10) with a flange in the middle, a spring (9), a push block (14) and an inclined plane pressing piece (13), one end of the fixing seat (11) close to the seat (1) is provided with a square stepped hole (30) which is vertically communicated, the middle of the fixing seat (11) is horizontally provided with a circular stepped hole (31) which is horizontally communicated with the left and right and is coaxial with the safety positioning jack (18), the spring (9) is sleeved on the lifting bolt (10), the right end of the spring (9) is abutted to the flange on the lifting bolt (10), the lifting bolt (10) is inserted in the circular stepped hole (31), and one end of the lifting bolt (10), far away from the fixing seat (11), is inserted in the safety positioning jack (18) ) The lower end of the push block (14) is inserted into the square stepped hole (30) and extends downwards, a second inclined plane (25) is arranged on the upper end face of the push block (14), a U-shaped notch is formed in the upper end of the push block (14), a first inclined plane (24) parallel to the second inclined plane (25) is formed on the inclined plane pressing piece (13) in an integrated mode, the second inclined plane (25) abuts against the first inclined plane (24), a dismounting hole coaxial with the lifting bolt (10) is formed in the middle of the first inclined plane (24), one end, close to the fixing seat (11), of the lifting bolt (10) is inserted into the dismounting hole in the first inclined plane (24), and the horizontal moving stroke distance of the first inclined plane (24) is larger than the depth of the safety positioning insertion hole (18).

3. The adjustable locking structure of a chair seat of a children's learning chair according to claim 2, characterized in that: the sliding body shell (4) is sleeved outside the inner jacket (20), sliding body shell holes (22) corresponding to the inner jacket holes (21) are symmetrically formed in the end, far away from the seat (1), of the sliding body shell (4) from top to bottom, and the bolts, the screws, the ratchet rods or the self-locking components with adjustable screwing lengths simultaneously penetrate through the inner jacket holes (21) and the sliding body shell holes (22) to be fixed.

4. The adjustable locking structure of a chair seat of a children's learning chair of claim 3, characterized in that: the lower side of the sliding body shell (4) is provided with a button (15) in an inserted mode, the button (15) is a shell with an upward opening, and a dismounting bolt (23) is arranged between the button (15) and the lower end of the push block (14) in a screwed mode.

5. The adjustable locking structure of a chair seat of a children's learning chair of claim 4, characterized in that: the fastening assembly (28) comprises a U-shaped connecting piece (8), a wrench bolt (7) and a locking wrench (6), a through hole is formed in the front bending end of the U-shaped connecting piece (8), the front bending part of the U-shaped connecting piece (8) penetrates through the inner jacket hole (21), a hinge hole (29) is formed in one end of the locking wrench (6), the locking wrench (6) is clamped on the U-shaped connecting piece (8), the hinge hole (29) in the locking wrench (6) is coaxial with the through hole in the U-shaped connecting piece (8), the wrench bolt (7) is inserted into the hinge hole (29) and the through hole, a locking surface (26) and a loosening surface (27) are arranged at one end, close to the hinge hole (29), of the locking wrench (6), the distance from the locking surface (26) to the axis of the hinge hole (29) is larger than the distance from the loosening surface (27) to the axis of the hinge hole (29), and an arc transition surface is arranged between the locking surface (26) and the relaxation surface (27), and the locking surface (26) is abutted to a plane on which a sliding body shell hole (22) is arranged on the sliding body shell (4).

6. The adjustable locking structure of a chair seat of a children's learning chair of claim 5, characterized in that: a sliding body sound insulation sheet (5) is arranged between the chair rod (3) and the inner wall of the inner jacket (20), the perimeter of the horizontal section of the sliding body sound insulation sheet (5) is not lower than two thirds of the perimeter of the horizontal section of the chair rod (3), and the outer side face of the sliding body sound insulation sheet (5) is abutted to the inner side face of the sliding body shell (4).

7. The adjustable locking structure of a chair seat of a children's learning chair of claim 6, characterized in that: the sliding body sound insulation sheet (5) is made of rubber or silica gel or plastic.

8. The adjustable locking structure of a chair seat of a children's learning chair of claim 7, wherein: the chair rod (3) and the same end face of the safety positioning jack (18) are fixedly provided with a raised limiting column (19), and the limiting column (19) is positioned at the lower side of the safety positioning jack (18).