Hinge suitable for tables and chairs

Abstract

The invention discloses a hinge suitable for tables and chairs, and relates to the technical field of hinges. 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 invention further discloses an adjustable chair and an adjustable table. The adjustable chair and the adjustable table structurally comprise the hinge suitable for the table and the chair. The device is reasonable in structural design, stable in structure, high in strength and convenient to operate.

Description

Technical Field

[0001] This application relates to the field of hinge technology, and more particularly to a hinge suitable for tables and chairs. Background Technology

[0002] Many chairs use adjustable hinges to connect the seat and backrest to improve comfort and practicality, allowing for multiple angle adjustments. Some tables also require tilting the tabletop to function as a drawing board. Current hinges for adjusting table and chair angles are typically push-button type, adjusting the hinge's rotation angle by engaging a stop pin with different locking holes. Such hinges have a small contact area at the stop pin, resulting in low strength, structural instability, and difficulty in operation; adjusting the angle requires considerable force to press the hinge vertically inward. Summary of the Invention

[0003] The technical problem this invention aims to solve is that push-button hinges have low strength, unstable structure, are difficult to adjust, and are inconvenient for fingers to apply force in the pressing direction while sitting in a chair. Therefore, this application provides a hinge suitable for tables and chairs that has a stable and robust structure, high strength, and is easy to apply force to, allowing for easy angle adjustment even while sitting in a chair, making it convenient to operate.

[0004] To solve the above-mentioned technical problems, the present invention provides a hinge suitable for tables and chairs, including a limiting hole, two or more limiting grooves connected to the limiting hole, a limiting boss snapped into the limiting hole, a pin slidably disposed in the middle of the limiting boss, the pin being connected to a lever plate with a handle at the upper end, the lever plate being able to control the pin to slide in and out of the limiting groove to control the unlocking hinge position.

[0005] Furthermore, the limiting hole is a circular hole, and the limiting boss can rotate at a certain angle inside the circular hole. The limiting hole is also connected to a limiting arc, and the upper end of the limiting boss has a limiting neck. The limiting neck can be restricted in its movement by the limiting arc. The limiting arc and the limiting groove are connected to the circular hole.

[0006] Furthermore, a spring is provided at the upper end of the pin, and a first shoulder is provided in the middle of the limiting boss. The first shoulder can limit the range of motion of the pin, and a second shoulder is provided in the middle of the limiting boss. The second shoulder can limit the compression of the spring.

[0007] Furthermore, the pin has a notch, and the lever has a protrusion. The protrusion aligns with the notch so that the lever can push and pull the pin.

[0008] Furthermore, one side of the lower end of the pin is a slope, one side of the limiting groove is provided with a sloping groove to guide the movement of the slope, and the other side is provided with a straight groove to restrict the continued movement of the pin.

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

[0010] This invention provides a hinge suitable for tables and chairs, with the following advantages: After the limiting boss rotates a certain angle within the limiting hole, the pin slides into the limiting groove and locks the hinge angle, thus adjusting the hinge rotation angle. The locking and limiting structure of this invention has a large force-bearing area, resulting in a stable structure and high strength. This invention uses a lever to adjust the pin; the lever's handle is wide, increasing the contact area between the hand and the lever, making it easier to apply force.

[0011] The present invention also provides an adjustable chair, comprising a pair of hinges suitable for tables and chairs as described in any of the above, a pair of limiting holes and limiting bosses respectively fixedly connected to the backrest or the sides of the seat, a lever that can move perpendicularly to the seat to unlock the hinge position, chair legs connected below the seat, the chair legs being height adjustable, and a flip-up plate provided below the seat.

[0012] Furthermore, the adjustable chair has C-shaped limiting rings on both sides of the backrest. When the hinges of the chair are adjusted to their maximum angles, the two ends of the C-shaped limiting rings abut against the upper and lower edges of the seat plate, respectively. The backrest is equipped with a reset mechanism that can reset the backrest. The other end of the reset mechanism is connected to the seat plate or chair leg.

[0013] Compared with existing technologies, the adjustable chair using the above technical solution has the following advantages: High hinge strength allows the backrest to be adjusted to a certain tilt angle while stably bearing weight, allowing for comfortable reclining and rest. Furthermore, the C-shaped limiting ring further strengthens the force-bearing structure at the hinge, extending the chair's lifespan. The position of the lever allows for easy backrest angle adjustment while seated, and the reset mechanism ensures the backrest can spring back to its original position, saving effort and facilitating operation.

[0014] The present invention also provides an adjustable table, including a pair of hinges for tables and chairs as described in any of the above claims, and a pair of height-adjustable table legs. The hinges for tables and chairs hinge the tabletop and table legs together, and a lever is disposed near the bottom of the tabletop and can be moved perpendicular to the tabletop to unlock the hinge position.

[0015] Furthermore, in the adjustable table technology solution, there are three limiting grooves, which can adjust the tabletop to a horizontal position and to an angled upward and downward position that deviates from the horizontal position.

[0016] Compared with existing technologies, the adjustable table using the above technical solution has the following advantages: High hinge strength allows the tabletop to be adjusted to a certain tilt angle while also extending the table's lifespan. Different limit slots of the latch lock allow the tabletop to be adjusted to a downward-facing drawing board or an upward-facing one, freeing up space. Combined with the adjustable chair of this invention, it can serve as a student's lunch break desk and chair, saving space. When adjusting the table, place your palms on both sides of the table, pull the handles on both sides to release the locking position, and then rotate your wrist to adjust. The chair of this invention can be adjusted without standing up; simply sit with your hands hanging down and pull the handles upwards, then lean back to adjust. To return to its original position, you can also pull the handles with both hands, or simply fold the backrest forward. It is convenient to use. Attached Figure Description

[0017] Figure 1 This is an exploded structural diagram of this application.

[0018] Figure 2 This is a structural diagram of this application.

[0019] Figure 3 This is an enlarged structural diagram of the pin in this application.

[0020] Figure 4 This is a structural diagram of the adjustable chair in this application.

[0021] Figure 5 This is a structural diagram of the adjustable chair backrest tilting according to this application.

[0022] Figure 6 This is a structural diagram of the adjustable table in this application.

[0023] Figure 7 This is a structural diagram of the adjustable tabletop of the present application, which is adjusted to an upward angle.

[0024] Figure 8 This is a schematic diagram of the exploded structure of this application.

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

[0026] Figure 10 This is a schematic diagram of the overall structure of the adjustable chair in this application.

[0027] Figure 11 This is a schematic diagram of the adjustable chair back tilt of this application.

[0028] Figure 12 This is a schematic diagram of the overall structure of the adjustable table in this application.

[0029] Figure 13 This is a schematic diagram of the adjustable tabletop of the table in this application being adjusted to an upward angle.

[0030] Explanation of reference numerals in the attached drawings: 1. Limiting hole; 11. Limiting groove; 111. Inclined groove; 112. Straight groove; 12. Limiting arc; 2. Limiting boss; 21. Limiting protrusion; 22. First shoulder; 23. Second shoulder; 3. Pin; 31. Notch; 32. Inclined surface; 4. Paddle; 41. Handhold; 42. Protrusion; 5. Spring; 6. Protective cover; 7. Adjustable chair; 71. Backrest; 72. Seat; 73. Chair leg; 74. Flip-up plate; 75. C-shaped limiting ring; 8. Adjustable table; 81. Table leg; 82. Tabletop. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described content cannot completely exemplify all implementation schemes. The following embodiments are only a part of many implementation schemes, and not all of them. Based on the disclosure of the present invention, all other implementation results obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0032] Hinges for tables and chairs

[0033] like Figure 1 and Figure 8 As shown, a hinge suitable for tables and chairs includes a limiting hole 1, a limiting boss 2 that engages within the limiting hole 1, and two or more limiting grooves 11 connected to the outside of the limiting hole 1. A pin 3 is slidably mounted in the middle of the limiting boss 2, and the pin 3 is connected to a lever 4 with a handle 41 at its upper end. The lever 4 controls the pin 3 to slide in and out of the limiting grooves 11, thus controlling the unlocking hinge position. When adjusting the hinge angle, the limiting boss 2 rotates to a certain angle in the limiting hole 1, pulling the relatively wide handle 41 at the upper end of the lever 4 moves the pin 3, causing it to slide into different limiting grooves 11. Since part of the pin 3 remains in the middle of the limiting boss 2, the limiting grooves 11 can restrict the rotation of the limiting boss 2, thereby locking the hinge rotation angle. The multiple limiting grooves 11 connected to the outside of the limiting hole 1 provide different positions for the pin 3 to slide into, thereby fixing the hinge at different angles.

[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 8As shown, the limiting hole 1 is a circular hole, and the limiting boss 2 can rotate at a certain angle within the circular hole. The limiting hole 1 is also externally connected to a limiting arc 12, and the upper end of the limiting boss 2 has a limiting neck 21. The limiting 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, ensuring smooth hinge rotation while increasing the structural strength of the hinge. The limiting arc 12 and the limiting groove 11 externally connected to the circular limiting hole 1 do not affect the rotation of the limiting boss 2, and can distribute the force when locking the limiting 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 protrusion 21, thereby limiting the maximum angle of rotation of the limiting protrusion 2 in the limiting hole 1. This prevents the limiting protrusion 2 from rotating excessively and freely at a large angle after the pin 3 is pulled out of the limiting groove 11 by the lever 4 when adjusting the hinge angle. This could make it difficult to reset and even cause accidents such as hand injuries caused by the hinge connection structure.

[0036] like Figure 1 and Figure 8 As 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, which can limit the range of motion of the pin 3. A second shoulder 23 is also provided in the middle of the limiting boss 2, which 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 intact and not over-compressed. When adjusting the angle, the lever 4 pulls the pin 3 out of the limiting groove 11. The pin 3 slides upward until it touches the first shoulder 22, providing a rigid tactile feedback to the user, which can prevent the user from using excessive force. When the limiting boss 2 is unlocked and begins to rotate, the pulling force on the lever 4 can be released. When rotating 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] like Figure 1 , Figure 3 and Figure 8 As shown, the pin 3 has a notch 31, and the lever 4 has a protrusion 42. The protrusion 42 is aligned with the notch 31 so that the lever 4 can push and pull the pin 3. The connection between the pin 3 and the lever 4 can also be set as an integral, fixed connection, as long as the lever 4 can drive the pin 3 to disengage from the limiting groove 11.

[0038] like Figure 3 and Figure 9As shown, one edge of the lower end of the pin 3 is a slope 32. One edge of the limiting groove 11 has a sloping groove 111 to guide the movement of the slope 32, and the other edge has a straight groove 112 to restrict the continued movement of the pin 3. The sloping groove 111 guides the slope 32 to slide in, and also helps to reduce effort when the pin 3 disengages from the limiting groove 11. A gentle pull on the lever 4 provides the initial force, allowing the slope 32 to easily slide out of the limiting groove 11. The straight groove 112 has the opposite function to the sloping groove 111, stopping the pin 3 from sliding further. The straight groove 112 has a large force-bearing area, resulting in high hinge strength.

[0039] like Figure 1 , Figure 2 and Figure 8 As shown, it also includes a protective cover 6. The protective cover 6 engages with the hinge surface, protecting the internal spring 5, pin 3, and other structures, ensuring that the internal structures slide within the hinge plane and do not move outwards and fall apart, further increasing the hinge strength. Hooks and other structures can also be installed on the protective cover 6.

[0040] Adjustable chair example

[0041] like Figure 4 , Figure 5 , Figure 10 and Figure 11 As shown, an adjustable chair includes a pair of hinges as described in any one of claims 1-6, suitable for tables and chairs. A pair of limiting holes 1 and limiting bosses 2 are respectively fixedly connected to the sides of the backrest 71 or the seat 72. A lever 4 can be moved perpendicular to the seat 72 to unlock the hinge position. A chair leg 73 is connected below the seat 72, and the chair leg 73 is height adjustable. A flip-up panel 74 is also provided below the seat 72. By adjusting the angle of the hinges, the backrest 71 can be adjusted to a certain tilt angle, allowing a person to lie down and rest. After the flip-up panel 74 is flipped out, it can be pulled outward to rest the legs and help blood circulation, making lying down more comfortable and improving sleep quality. The position of the lever 4 allows the user to easily adjust the angle of the backrest 71 with one hand while sitting in the chair.

[0042] like Figure 1 , Figure 5 , Figure 10 and Figure 11As shown, the adjustable chair backrest 71 is equipped with C-shaped limiting rings 75 on both sides. When the hinges, suitable for tables and chairs, are adjusted to their maximum angles, the two ends of the C-shaped limiting rings 75 abut against the upper and lower edges of the seat plate 72, respectively. The backrest 71 is equipped with a reset mechanism that allows it to return to its original position. The other end of the reset mechanism is connected to the seat plate 72 or the chair leg 73. The C-shaped limiting rings 75 on both sides of the backrest 71, fixedly connected to the limiting boss 2, further increase the force-bearing structure around the hinges, distributing some of the force on the hinges and extending the chair's lifespan. The reset mechanism connecting the backrest 71 and other chair structures allows the backrest 71 to spring back to its original position, making the hinge angle adjustment during backrest 71 reset easier.

[0043] like Figure 6 , Figure 12 and Figure 13 As shown, an adjustable table includes a pair of hinges as described in any one of claims 1-6, suitable for tables and chairs, and a pair of height-adjustable table legs 81. The hinges connect the tabletop 82 and the table legs 81. A lever 4 is located near the bottom of the tabletop 82 and can be moved perpendicular to the tabletop 82 to unlock the hinge position. The hinges used in the adjustable table have three limiting grooves (11), which can adjust the tabletop (82) to a horizontal direction and to an angled upward and downward direction. The lever 4 is located near the bottom of the tabletop 82, making it easy to pull the adjusting hinge to tilt the tabletop at a certain angle. The pin 3 locks different limiting grooves 11 to adjust the tabletop 82 to a downward-sloping drawing board mode, or to an upward-sloping tabletop, making room for the adjustable chair of this invention to serve as a student's lunch break desk and chair, saving space while ensuring the comfort of students during lunch break.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiments. Equivalent changes to the structure, shape and principle made within the scope of knowledge possessed by those skilled in the art are all within the protection scope of the present invention.

Claims

1. A hinge suitable for tables and chairs, characterized in that: It includes a limiting hole (1), which is connected to two or more limiting grooves (11). A limiting boss (2) is engaged in the limiting hole (1). A pin (3) is slidably provided in the middle of the limiting boss (2). The pin (3) is connected to a lever (4) with a hand-held part (41) at the upper end. The lever (4) can control the pin (3) to slide in and out of the limiting groove (11) to control the unlocking hinge position.

2. The hinge for tables 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 inside the circular hole. The limiting hole (1) is also connected to a limiting arc (12). The upper end of the limiting boss (2) has a limiting neck (21). The limiting neck (621) can be restricted in its movement by the limiting arc (12). The limiting arc (12) and the limiting groove (11) are connected to the circular hole.

3. The hinge for tables and chairs according to claim 1, characterized in that: The upper end of the pin (3) is also provided with a spring (5), and the middle part of the limiting boss (2) is provided with a first shoulder (22), which can limit the range of motion of the pin (3). The middle part of the limiting boss (2) is also provided with a second shoulder (23), which can limit the compression of the spring (5).

4. The hinge for tables and chairs according to claim 1, characterized in that: The pin (3) has a notch (31), and the lever (4) has a protrusion (42). The protrusion (42) is aligned with the notch (31) so that the lever (4) can push and pull the pin (3).

5. The hinge for tables and chairs according to claim 2, characterized in that: The lower end of the pin (3) has a slope (32) on one side, and the limiting groove (11) has a sloping groove (111) on one side to guide the movement of the slope (32), and a straight groove (112) on the other side to restrict the continued movement of the pin (3).

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

7. An adjustable chair, characterized in that: Includes a pair of hinges for tables and chairs as described in any one of claims 1-6, a pair of limiting holes (1) and limiting bosses (2) respectively fixedly connected to the backrest (71) or the seat (72) on both sides, the lever (4) can move perpendicular to the seat (72) to unlock the hinge position, a chair leg (73) is connected below the seat (72), the chair leg (73) is height adjustable, and a flip plate (74) is also provided below the seat (72).

8. The adjustable chair according to claim 7, characterized in that: The backrest (71) is also provided with C-shaped limiting rings (75) on both sides. When the hinges of the table and chair are adjusted to the two maximum angles, the two ends of the C-shaped limiting rings (75) abut against the upper and lower edges of the seat plate (72) respectively. The backrest (71) is provided with a reset mechanism that can reset the backrest (71). The other end of the reset mechanism is connected to the seat plate (72) or the chair leg (73).

9. An adjustable table, characterized in that: Includes a pair of hinges for tables and chairs as described in any one of claims 1-6, and a pair of height-adjustable table legs (81), the hinges for tables and chairs hinge the tabletop (82) and the table legs (81), the lever (4) is disposed near the bottom of the tabletop (82) and can be moved perpendicular to the tabletop (82) to unlock the hinge position.

10. The adjustable table according to claim 9, characterized in that: There are three limiting grooves (11), which can adjust the desktop (82) to a horizontal direction and to an oblique upward and oblique downward direction that deviates from the horizontal direction.

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