Hinge suitable for table and chair, adjustable chair and table

Abstract

The utility model discloses a hinge suitable for tables and chairs, an adjustable chair and a table. According to the structure, a limiting boss is clamped in a limiting hole, the limiting hole is externally connected with two or more limiting grooves, a plug pin is arranged in the middle of the limiting boss in a sliding mode, the plug pin is connected with a shifting plate with a handheld part at the upper end, and the shifting plate can control the plug pin to slide in and out of the limiting grooves to control the unlocking hinge position. The utility model further discloses an adjustable chair and an adjustable table. The adjustable chair and the adjustable table each structurally comprise the hinge suitable for the table and the chair. The utility model has the advantages of reasonable structural design, stable structure, higher strength and convenience in operation.

Description

Technical Field

[0001] This application relates to the technical field of hinges, and particularly to a hinge applicable to desks and chairs. Background Art

[0002] In order to improve comfort and practicality, many chairs use hinges with adjustable angles to connect the seat board and the backrest, so as to realize the adjustment of the backrest at multiple angles. Some desks also need to tilt the desktop at a certain angle to realize functions such as a drawing board. Existing hinges for adjusting the angles of desks and chairs are usually push-type, and the rotation angle of the hinge is adjusted by making the limit post snap into different gear holes. Such hinges have a small stress area at the limit position, low strength, unstable structure, and are not easy to operate. When adjusting the angle, a relatively large force is required to press vertically into the hinge. Utility Model Content

[0003] The technical problem to be solved by this utility model is that the push-type hinge has low strength, unstable structure, is not easy to operate during adjustment, and it is inconvenient for fingers to exert force in the pressing direction when sitting on the chair. Therefore, this application provides a hinge applicable to desks and chairs, which has a stable and solid structure, relatively high strength, and is convenient for exerting force. It is also possible to easily adjust the angle while sitting on the chair, which is convenient for operation.

[0004] To solve the above technical problem, this utility model provides a hinge applicable to desks and chairs, including a limit hole, two or more limit slots are externally connected to the limit hole, a limit boss is clamped in the limit hole, a plug pin is slidably arranged in the middle of the limit boss, the plug pin is connected to a dial plate with a handheld part at the upper end, and the dial plate can control the sliding of the plug pin in and out of the limit slot to control the unlocking of the hinged position.

[0005] Further, the limit hole is a circular hole, the limit boss can rotate at a certain angle in the circular hole, the limit hole is also externally connected to a limit arc, there is a limit convex neck at the upper end of the limit boss, and the limit convex neck can be restricted by the limit arc. The limit arc and the limit slot are externally connected to the circular hole.

[0006] Further, a spring is also arranged at the upper end of the plug pin, a first shoulder is arranged in the middle of the limit boss, the first shoulder can limit the movement range of the plug pin, and a second shoulder is also arranged in the middle of the limit boss, and the second shoulder can limit the compression of the spring.

[0007] Further, there is a notch on the plug pin, and a convex block on the dial plate, and the convex block is aligned with the notch so that the dial plate can push and pull the plug pin.

[0008] Further, one side edge of the lower end of the plug pin is a slope, one side edge of the limit slot is provided with an inclined slot for guiding the movement of the slope, and the other side edge is provided with a straight slot for restricting the continuous movement of the plug pin.

[0009] Further, it also includes a top cover.

[0010] A hinge applicable to desks and chairs provided by the present utility model has the following beneficial effects: After the limiting boss rotates a certain angle in the limiting hole, the bolt slides into the limiting groove to lock the angle of the hinge, realizing the adjustment of the rotation angle of the hinge. The locking and limiting structure of the present utility model has a large stress area, is structurally stable and has high strength. In the present utility model, a dial plate is used to adjust the bolt. The hand-held part of the dial plate is wide, increasing the contact area between the hand and the dial plate and facilitating the application of force.

[0011] The present utility model also provides an adjustable chair, which includes a pair of hinges applicable to desks and chairs described in any one of the above. A pair of limiting holes and limiting bosses are respectively fixedly connected to both sides of the backrest or the seat board. The dial plate can move perpendicular to the seat board to unlock the hinged position. A chair leg is connected below the seat board, and the height of the chair leg is adjustable. A flap is also provided below the seat board.

[0012] Further, C-shaped limiting rings are also provided on both sides of the backrest of the adjustable chair. When the hinges applicable to desks and chairs are adjusted to two maximum angles, the two ends of the C-shaped limiting rings respectively abut against the upper edge and the lower edge of the seat board. The backrest is provided with a reset mechanism capable of resetting the backrest, and the other end of the reset mechanism is connected to the seat board or the chair leg.

[0013] The adjustable chair adopting the above technical solution has the following beneficial effects compared with the prior art: The hinge has high strength, enabling the backrest to adjust a certain inclination angle while being able to stably bear the weight, allowing people to lie down and rest. In addition, the setting of the C-shaped limiting ring further increases the stress structure at the hinge and extends the service life of the chair. The position of the dial plate is set so that people can easily adjust the backrest angle while sitting on the chair. The reset mechanism is provided to enable the backrest to rebound and reset, which is labor-saving and convenient to operate.

[0014] The present utility model also provides an adjustable table, which includes a pair of hinges applicable to desks and chairs described in any one of the above, and also includes a pair of table legs with adjustable height. The hinges applicable to desks and chairs hinge the tabletop and the table legs. The dial plate is arranged near the lower part of the tabletop and can move perpendicular to the tabletop to unlock the hinged position.

[0015] Further, in the technical solution of the adjustable table, there are three limiting grooves in total, and the tabletop can be adjusted to a horizontal direction, an inclined upward and an inclined downward direction deviating from the horizontal.

[0016] The adjustable table adopting the above technical solution has the following beneficial effects compared with the prior art: The hinge has high strength, enabling the tabletop to be adjusted at a certain inclination angle while also extending the service life of the table. Different limit slots of the bolt lock can adjust the tabletop into a drawing board inclined downward or adjust the tabletop inclined upward to create space. When paired with the adjustable chair in this utility model, it can be used as a student's lunch break desk and chair, saving space. When adjusting the table of this utility model, place the palm on both sides of the table, pull the finger on the two side holding parts to release the locked state, and then rotate the wrist to adjust, which is convenient to use. When adjusting the chair of this utility model, there is no need to stand up. Just sit and pull the holding parts upward with both hands hanging down, and then lean back to adjust. When resetting, you can also pull the holding parts with both hands, or directly fold the backrest forward, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an exploded structure diagram of this application.

[0018] Figure 2 It is a structure diagram of this application.

[0019] Figure 3 It is an enlarged structure diagram of the bolt of this application.

[0020] Figure 4 It is an overall structure diagram of the adjustable chair of this application.

[0021] Figure 5 It is a structure diagram of the backrest of the adjustable chair of this application being inclined.

[0022] Figure 6 It is an overall structure diagram of the adjustable table of this application.

[0023] Figure 7 It is a structure diagram of the tabletop of the adjustable table of this application being adjusted to an upward inclined direction.

[0024] Figure 8 It is an exploded structure schematic diagram of this application.

[0025] Figure 9 It is an assembly schematic diagram of this application.

[0026] Figure 10 It is an overall structure schematic diagram of the adjustable chair of this application.

[0027] Figure 11 It is a schematic diagram of the backrest of the adjustable chair of this application being inclined.

[0028] Figure 12 It is an overall structure schematic diagram of the adjustable table of this application.

[0029] Figure 13 It is a schematic diagram of the tabletop of the adjustable table of this application being adjusted to an upward inclined direction.

[0030] Description of reference numerals: 1. Limit hole; 11. Limit groove; 111. Inclined groove; 112. Straight groove; 12. Limit arc; 2. Limit boss; 21. Limit neck; 22. First shoulder; 23. Second shoulder; 3. Plug; 31. Notch; 32. Inclined plane; 4. Dial plate; 41. Hand-held part; 42. Protrusion; 5. Spring; 6. Protective cover; 7. Adjustable chair; 71. Backrest; 72. Seat board; 73. Chair leg; 74. Flap; 75. C-shaped limit ring; 8. Adjustable table; 81. Table leg; 82. Table top. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings of the present invention. Obviously, the described content cannot fully list all implementation manners. The following embodiments are only a part of numerous implementation manners, rather than all embodiments. Based on the disclosed content of the present invention, all other implementation results obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0032] Embodiment of a hinge applicable to desks and chairs

[0033] As Figure 1 and Figure 8 shown, a hinge applicable to desks and chairs includes a limit hole 1. A limit boss 2 is clamped in the limit hole 1. Two or more limit grooves 11 are externally connected to the limit hole 1. A plug 3 is slidably arranged in the middle of the limit boss 2. The plug 3 is connected to a dial plate 4 with a hand-held part 41 at the upper end. The dial plate 4 can control the sliding of the plug 3 in and out of the limit groove 11 to control the unlocking of the hinged position. When adjusting the hinge angle, the limit boss 2 rotates to a certain angle in the limit hole 1. Pull the relatively wide hand-held part 41 at the upper end of the dial plate 4 to drive the plug 3, so that the plug 3 slides into different limit grooves 11. Since part of the plug 3 is still in the middle of the limit boss 2, the limit groove 11 can limit the rotation of the limit boss 2, thereby locking the rotation angle of the hinge. The multiple limit grooves 11 externally connected to the limit hole 1 provide different gears for the plug 3 to slide into, so as to fix the hinge at different gear angles.

[0034] As Figure 1 、 Figure 2 、 Figure 3 and Figure 8As shown, the limiting hole 1 is a circular hole. The limiting boss 2 can rotate at a certain angle within the circular hole. The limiting hole 1 is also externally connected with a limiting arc 12. The upper end of the limiting boss 2 has a limiting convex neck 21, and the limiting convex neck 21 can be restricted in its movement by the limiting arc 12. The limiting arc 12 and the limiting groove 11 are externally connected to the circular hole. When the limiting hole 1 is circular, it can better fit the limiting boss 2, increasing the hinge structure strength while ensuring smooth rotation of the hinge. The circular external limiting arc 12 and limiting groove 11 of the limiting hole 1 do not affect the rotation of the limiting boss 2, and can share the force when clamping the limiting convex neck 21 and the locking pin 3, increasing the force-bearing area and further increasing the hinge strength.

[0035] The limiting arc 12 restricts the movement distance of the limiting convex neck 21, thereby restricting the maximum angle of rotation of the limiting boss 2 in the limiting hole 1. This prevents the unlocked limiting boss 2 from rotating freely by a large angle and being difficult to reset when the dial 4 pulls out the pin 3 from the limiting groove 11 during the adjustment of the hinge angle, and even causing accidents such as pinching the hand by the hinge connection structure.

[0036] As Figure 1 and Figure 8 shown, a spring 5 is also provided at the upper end of the pin 3. A first shoulder 22 is provided in the middle of the limiting boss 2, and the first shoulder 22 can limit the movement range of the pin 3. A second shoulder 23 is also provided in the middle of the limiting boss 2, and the second shoulder 23 can limit the compression of the spring 5. The spring is accommodated between the first shoulder 22 and the second shoulder 23 to ensure that the spring is not over-compressed. When adjusting the angle, the dial 4 pulls out the pin 3 from the limiting groove 11, and the pin 3 slides upward until it touches the first shoulder 22, providing a rigid touch feedback to the user to avoid excessive force by the user. When the limiting boss 2 is unlocked and starts to rotate, the pulling force on the dial 4 can be released. When it rotates to the next limiting groove 11, the elasticity of the spring 5 will automatically push the pin 3 into the limiting groove 11 to lock the hinge angle.

[0037] As Figure 1 、 Figure 3 and Figure 8 shown, there is a notch 31 on the pin 3 and a convex block 42 on the dial 4. The convex block 42 is aligned with the notch 31 so that the dial 4 can push and pull the pin 3. The connection between the pin 3 and the dial 4 can also be set as an integral body or a fixed connection, as long as the dial 4 can drive the pin 3 to disengage from the limiting groove 11.

[0038] As Figure 3 and Figure 9As shown in the figure, one side edge of the lower end of the bolt 3 is a slope 32. One side edge of the limiting groove 11 is provided with an inclined groove 111 for guiding the movement of the slope 32, and the other side edge is provided with a straight groove 112 for restricting the continuous movement of the bolt 3. The inclined groove 111 can guide the slope 32 to slide in, and can also play a role in saving effort when the bolt 3 disengages from the limiting groove 11. Gently pulling the dial 4 to provide an initial force can make the slope 32 easily slide out of the limiting groove 11. The function of the straight groove 112 is opposite to that of the inclined groove 111, and can stop the bolt 3 from continuing to slide. The straight groove 112 has a large stress area, making the hinge stronger.

[0039] As Figure 1 , Figure 2 and Figure 8 shown in the figure, it further includes a protective cover 6. The protective cover 6 is snap-fitted on the surface of the hinge to protect internal structures such as the spring 5 and the bolt 3, ensuring that the internal structures slide within the hinge plane and will not move outward and fall apart, further increasing the strength of the hinge. Structures such as hooks can also be provided on the protective cover 6.

[0040] Embodiment of an adjustable chair

[0041] As Figure 4 , Figure 5 , Figure 10 and Figure 11 shown in the figure, an adjustable chair includes a pair of hinges suitable for tables and chairs. A pair of limiting holes 1 and limiting bosses 2 are respectively fixedly connected to both sides of the backrest 71 or the seat board 72. The dial 4 can move perpendicular to the seat board 72 to unlock the hinged position. A chair leg 73 is connected below the seat board 72, and the height of the chair leg 73 can be adjusted. A flap 74 is also provided below the seat board 72. By adjusting the angle of the hinge, the backrest 71 can be adjusted to a certain inclination angle for people to lie down and rest. After the flap 74 is flipped out, it can also be pulled outwards to support the legs to help blood circulation, making lying down more comfortable and improving sleep quality. The position of the dial 4 is set so that the user can easily adjust the angle of the backrest 71 with one hand when sitting or leaning on the chair.

[0042] As Figure 1 , Figure 5 , Figure 10 and Figure 11 shown in the figure, C-shaped limiting rings 75 are also provided on both sides of the backrest 71 of the adjustable chair. When the hinges suitable for tables and chairs are adjusted to two maximum angles, the two ends of the C-shaped limiting rings 75 respectively abut against the upper edge and the lower edge of the seat board 72. The backrest 71 is provided with a reset mechanism for resetting the backrest 71, and the other end of the reset mechanism is connected to the seat board 72 or the chair leg 73. The C-shaped limiting rings 75 fixedly connected to both sides of the backrest 71 further increase the stress structure around the hinge, share part of the stress of the hinge, and extend the service life of the chair. The reset mechanism connecting the backrest 71 and other structures of the chair can make the backrest 71 rebound and reset, making the operation of rotating the hinge angle when the backrest 71 is reset more labor-saving.

[0043] As Figure 6 , Figure 12 and Figure 13 shown, an adjustable table includes a pair of hinges suitable for desks and chairs, and also includes a pair of table legs 81 with adjustable height. The hinges suitable for desks and chairs hinge the tabletop 82 and the table legs 81. The dial 4 is arranged near the lower part of the tabletop 82 and can move perpendicular to the tabletop 82 to unlock the hinged position. There are a total of three inner limit slots (11) in the hinges used for the adjustable table, and the tabletop (82) can be adjusted to a horizontal direction, an obliquely upward and an obliquely downward direction deviating from the horizontal. The dial 4 is near the lower part of the tabletop 82, which is convenient for pulling to adjust the hinge so that the tabletop tilts at a certain angle. The bolt 3 locks different limit slots 11, and the tabletop 82 can be adjusted to a drawing board mode obliquely downward, or the tabletop 82 can be adjusted obliquely upward to make space. When paired with the adjustable chair in the present utility model as a student lunch break desk and chair, it can save space while ensuring the comfort of students during lunch breaks.

[0044] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Equivalent changes made to the structure, shape, and principle within the knowledge scope of those of ordinary skill in the art all fall within the protection scope of the present utility model.

Claims

1. A hinge applicable to desks and chairs, characterized in that: It includes a limiting hole (1), and two or more limiting grooves (11) are externally connected to the limiting hole (1). A limiting boss (2) is clamped in the limiting hole (1). A bolt (3) is slidably arranged in the middle of the limiting boss (2). The bolt (3) is connected to a dial plate (4) with a hand-held part (41) at the upper end. The dial plate (4) can control the sliding of the bolt (3) in and out of the limiting groove (11) to control the unlocking of the hinged position.

2. The hinge applicable to desks and chairs according to claim 1, characterized in that: The limiting hole (1) is a circular hole. The limiting boss (2) can rotate at a certain angle in the circular hole. The limiting hole (1) is also externally connected to a limiting arc (12). There is a limiting convex neck (21) at the upper end of the limiting boss (2). The movement of the limiting convex neck (21) can be restricted by the limiting arc (12). The limiting arc (12) and the limiting groove (11) are externally connected to the circular hole.

3. The hinge applicable to tables and chairs according to claim 1, characterized in that: A spring (5) is also arranged at the upper end of the bolt (3). A first shoulder (22) is arranged in the middle of the limiting boss (2). The first shoulder (22) can limit the movement range of the bolt (3). A second shoulder (23) is also arranged in the middle of the limiting boss (2). The second shoulder (23) can limit the compression of the spring (5).

4. The hinge applicable to desks and chairs according to claim 1, characterized in that: There is a notch (31) on the bolt (3), and a convex block (42) on the dial plate (4). The convex block (42) is aligned with the notch (31) so that the dial plate (4) can push and pull the bolt (3).

5. The hinge for tables and chairs according to claim 2, characterized in that: One side edge of the lower end of the bolt (3) is a slope (32). One side edge of the limiting groove (11) is provided with an inclined groove (111) for guiding the movement of the slope (32), and the other side edge is provided with a straight groove (112) for restricting the further movement of the bolt (3).

6. The hinge applicable to tables and chairs according to claim 1, characterized in that: It also includes a protective cover (6).

7. An adjustable chair, characterized in that: It includes a pair of hinges applicable to desks and chairs as described in any one of claims 1-6. A pair of the limiting holes (1) and the limiting bosses (2) are respectively fixedly connected to both sides of the backrest (71) or the seat board (72). The dial plate (4) can move perpendicular to the seat board (72) to unlock the hinged position. A chair leg (73) is connected below the seat board (72), and the height of the chair leg (73) can be adjusted. A flap (74) is also arranged below the seat board (72).

8. The adjustable chair according to claim 7, wherein: C-shaped limiting rings (75) are also arranged on both sides of the backrest (71). When the hinges applicable to desks and chairs are adjusted to two maximum angles, the two ends of the C-shaped limiting rings (75) respectively abut against the upper edge and the lower edge of the seat board (72). The backrest (71) is provided with a reset mechanism for resetting the backrest (71), and the other end of the reset mechanism is connected to the seat board (72) or the chair leg (73).

9. An adjustable table, characterized in that: It includes a pair of hinges applicable to desks and chairs as described in any one of claims 1-6. It also includes a pair of table legs (81) with adjustable height. The hinges applicable to desks and chairs hinge the tabletop (82) and the table legs (81). The dial plate (4) is arranged close to the lower part of the tabletop (82) and can move perpendicular to the tabletop (82) to unlock the hinged position.

10. The adjustable table according to claim 9, characterized in that: There are three limiting grooves (11) in total, and the tabletop (82) can be adjusted to a horizontal direction, an inclined upward direction and an inclined downward direction deviating from the horizontal.

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