CN219249648U

CN219249648U - Hinge structure and seat armrest

Info

Publication number: CN219249648U
Application number: CN202320271489.0U
Authority: CN
Inventors: 徐鸿飞
Original assignee: Zhejiang Yuexing Intelligent Technology Co ltd
Current assignee: Zhejiang Yuexing Intelligent Technology Co ltd
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-06-27
Anticipated expiration: 2033-02-21

Abstract

A seat comprising a hinge structure, the hinge structure comprising: the fixing plate is provided with a first connecting hole and a guide groove, and first gear teeth are arranged in the guide groove; the rotating plate is provided with a second connecting hole and a mounting groove which correspond to the first connecting hole and the guide groove respectively; the clamping block is provided with clamping teeth meshed with the first gear teeth; the elastic sheet is arranged in the mounting groove and acts on the clamping block; the pin shaft passes through the first connecting hole and the second connecting hole respectively and is fixedly connected with the fixed plate; and the reset spring deforms and acts on the rotating plate when the rotating plate rotates around the central axis of the pin shaft. The device can control the armrest by turning up the angle in multiple gears, can automatically realize locking, unlocking and resetting functions, can freely adjust the angle of the armrest according to body actions, lightens hand pressure, and has the advantage of high comfort level; the hinge structure is compact in structure and convenient to assemble, can be applied to seat armrests with various specifications, and has the advantage of high practicability.

Description

Hinge structure and seat armrest

Technical Field

The utility model belongs to the technical field of furniture, and particularly relates to a hinge structure and a seat armrest.

Background

Armrests of chairs are usually fixed to the chair by brackets, which mainly give the person the ability to place his arms for comfort. In the traditional chair, the position of the armrests on the chair is generally not adjustable, and the height is relatively fixed, so that inconvenience is brought to a user.

As the performance requirements of furniture become higher, seats with adjustable armrests tend to be pursued. The existing adjustable seat can generally realize the adjustment of the front and back and the height of the armrests, and cannot realize the rotation adjustment of the armrests relative to the panel. In a practical scene, the difference of the body types of each person can cause different demands on the front and back positions, the heights and the angles of the armrests; even the same user may have different requirements in different time periods, for example, after long periods of work, the joints and muscles at the arms and wrists are under tension, and the arms and wrists need to be released by adjusting the position and angle of the armrests. Accordingly, there is a need for a seat armrest that can adjust an angle that addresses the above-described issues.

The document with the authorized bulletin number of CN216675255U discloses a novel multi-gear upturning angle control armrest, which comprises an armrest main frame and an armrest upper arm; the upper arm of the armrest is rotatably arranged on the armrest main frame; a locking assembly with locking and unlocking functions is arranged between the upper arm of the armrest and the armrest main frame; the upper arm of the armrest is provided with the armrest; the locking assembly comprises a reset ring, a gear, a wave spring ring, an end round gasket and a round cover. The working principle of the device is as follows: the upper arm of the armrest is driven to rotate so as to drive the gear teeth b on the gear to be meshed with the gear teeth a in the upper arm of the armrest for rotation, and gear adjustment is realized; after rotating for a certain angle, the convex blocks in the gear are guided to higher protruding positions along the inclined planes of the clamping grooves of the reset ring, so that the meshing of the gear teeth b and the gear teeth a is released, the upper arm of the lower rotating handrail is at the initial position, the convex blocks slide downwards to the initial position along the inclined planes of the clamping grooves of the reset ring, and the meshing of the gear teeth b and the gear teeth a is completed.

But this device also has the following drawbacks: the gear adjusting structure of the device can release the locking of the gear teeth a in the upper arm of the handrail only by lifting the whole gear, and has the advantages of complex and numerous parts, high precision requirement and high assembly difficulty; through the mode unblock of lifting, the friction surface between the part is big, leads to adjusting function to become invalid easily after long-time wearing and tearing, and life is short.

Disclosure of Invention

Aiming at the problems, one of the purposes of the utility model is to provide a hinge structure which adopts smaller locking parts to realize the locking and unlocking functions, and the relative positions of all parts are not changed in the whole process, so that the hinge structure has the advantages of high installation efficiency and long service life.

In order to achieve the above object, the technical scheme of the present utility model is as follows:

a hinge structure, comprising:

the fixing plate is provided with a first connecting hole and a guide groove, and first gear teeth are arranged in the guide groove;

the rotating plate is provided with a second connecting hole and a mounting groove which correspond to the first connecting hole and the guide groove respectively;

the clamping block is provided with clamping teeth meshed with the first gear teeth;

the elastic piece is arranged in the mounting groove and acts on the clamping block;

the pin shaft passes through the first connecting hole and the second connecting hole respectively and is fixedly connected with the fixing plate;

and the return spring deforms and acts on the rotating plate when the rotating plate rotates around the central axis of the pin shaft.

As a further preferred aspect of the present utility model, the cartridge further includes a fixing portion provided in the installation groove and a fitting portion inserted into the guide groove; the spring plate comprises a locking end and a free end.

As a further preferred aspect of the present utility model, the mounting groove includes a fitting portion for fixing the locking end, and a mounting portion for inserting the fixing portion and communicating with the fitting portion, and the free end extends into the mounting portion and abuts against the fixing portion.

As a further preferred aspect of the present utility model, a first locking point for fixing the locking end and a second locking point for fixing the fixing portion are provided at the connection portion of the fitting portion and the mounting portion, respectively.

As a further preferred aspect of the present utility model, the external force rotates the rotating plate until the second clamping point clamps the fixing portion, the engaging portion and the guide groove are in a separated state, and the rotating plate reversely rotates under the action of the return spring until reset after the external force is released.

As a further preferred aspect of the present utility model, a side surface of the guide groove remote from the first coupling hole is an arc surface and is formed with the first gear teeth.

As a further preferred aspect of the present utility model, the free end acts on the fixed portion when the first gear teeth and the latch teeth are engaged, thereby locking the engaging portion and the guide groove to each other; when the rotating plate is rotated by external force, the free end is further compressed by the fixing part to unlock, and the matching part and the guide groove are locked again after the external force is released.

As a further preferable mode of the utility model, the end portion of the pin shaft is provided with a straight slot, and one end portion of the return spring is arranged in the straight slot in a penetrating mode.

As a further preferable aspect of the present utility model, the first connecting hole is internally provided with an internal thread, and the pin is provided with an external thread that mates with the internal thread.

Another object of the present utility model is to provide a chair armrest having at least one hinge structure as described above.

In summary, the utility model has the following beneficial effects:

the device can control the armrest through the upturning angle with multiple gears, and can automatically realize the functions of locking, unlocking and resetting, so that the angle of the armrest can be freely adjusted according to the body action, the hand pressure is reduced, and the device has the advantage of high comfort level.

The hinge structure provided by the device is compact in structure and convenient to assemble, can be applied to seat armrests with various specifications, and has the advantage of high practicability.

Drawings

Fig. 1 is a perspective combined view of the hinge structure of the present utility model.

Fig. 2 is an exploded view of the hinge structure of the present utility model.

Fig. 3 is an exploded view of the hinge structure of the present utility model.

Fig. 4 is a perspective view of the rotating plate of the present utility model.

Fig. 5 is a schematic plan view of a rotating plate according to the present utility model.

Fig. 6 is a schematic view showing the state of the hinge structure of the present utility model.

Fig. 7 is another perspective view of the hinge structure of the present utility model.

Fig. 8 is another perspective view of the fixing plate of the present utility model.

Fig. 9 is another perspective view of the pivotal board of the present utility model.

Fig. 10 is a schematic view of a seat armrest according to the present utility model.

Reference numerals illustrate:

a fixed plate 1, a front plate 1-1, an extension plate 1-2, a first connecting hole 11, internal threads 111, a guide groove 12, first gear teeth 121, and a connecting pin 13;

the rotation plate 2, the second connection hole 21, the mounting groove 22, the fitting part 221, the first clamping point 2211, the mounting part 222, the second clamping point 2221, and the fixing column 23;

the clamping block 3, the clamping tooth 31, the fixing part 32 and the matching part 33;

the spring plate 4, the locking end 41 and the free end 42;

the pin shaft 5, the straight slot 51 and the external thread 52;

a return spring 6;

a cover plate 7;

a spacer 8, a groove 81;

a fixed lining board 100, a movable lining board 200 and a bracket 300.

Detailed Description

Example 1

As shown in fig. 1 to 5, the present embodiment provides a hinge structure, including:

the fixing plate 1 is provided with a first connecting hole 11 and a guide groove 12. An internal thread 111 is arranged in the first connecting hole 11; the guide groove 12 is provided with first gear teeth 121, and the side surface of the guide groove 12 away from the first connecting hole 11 is an arc surface and is provided with the first gear teeth 121. The fixing plate 1 is composed of two parallel front plates 1-1 and an extension plate 1-2, the front plates 1-1 and the extension plate 1-2 are fixed through connecting pins 13, the extension plate 1-2 is arranged between the two parallel front plates 1-1, and a concave cambered surface is formed at the end part of the extension plate.

The rotating plate 2 is provided with a second connecting hole 21 and a mounting groove 22 corresponding to the first connecting hole 11 and the guide groove 12 respectively. The rotating plate 2 is arranged between the two parallel front plates 1-1, and the end part of the rotating plate is provided with an outer convex cambered surface matched with the inner concave cambered surface. The advantage of setting up like this lies in, both can spacing fixed rotor plate 2, guarantees that it only rotates and not squints, also is convenient for assemble and dismantle whole hinge structure to the spare part that the degree of wear is big is changed to the convenience.

The fixture block 3, the fixture block 3 is formed with a latch 31 engaged with the first gear teeth 121, the fixture block 3 further includes a fixing portion 32 disposed in the mounting groove 22 and a mating portion 33 inserted into the guide groove 12.

The elastic piece 4 is arranged in the mounting groove 22 and acts on the clamping block 3, and the elastic piece 4 comprises a locking end 41 and a free end 42.

The pin shaft 5 passes through the first connecting hole 11 and the second connecting hole 21 respectively, and is fixedly connected with the fixed plate 1 through an external thread 52 matched with the internal thread 111, and a straight slot 51 is formed at the end part of the pin shaft 5.

And a return spring 6, which is a spiral spring, one end of the return spring is inserted into the straight slot 51, the other end is connected with a fixed column 23 arranged at the rear end of the rotating plate 2, and the return spring 6 deforms and acts on the rotating plate 2 when the rotating plate 2 rotates around the central axis of the pin shaft 5. The arrangement of the return spring enhances the engagement force of the latch 31 with the first gear teeth 121 on the one hand, improves the self-locking performance, and on the other hand, can enable the movable plate 2 to automatically rebound from a limit state to a closed state.

And the cover plate 7 is used for covering the pin shaft 5 and the return spring 6.

The gaskets 8 are arranged on two sides of the pin shaft 5 to protect the fixing plate 1, and the gaskets 8 are provided with grooves 81 at the end part of the pin shaft 5 provided with the straight grooves 51 for reinforcing the pin shaft 5.

In the present embodiment, the mounting groove 22 includes a fitting portion 221 for fixing the locking end 41, and a mounting portion 222 for inserting the fixing portion 32 and communicating with the fitting portion 221, and the free end 42 extends into the mounting portion 222 and abuts against the fixing portion 32; when the first gear teeth 121 and the latch teeth 31 are engaged, the free end 42 acts on the fixed portion 32, thereby locking the engaging portion 33 and the guide groove 12 to each other; when the rotating plate 2 is rotated by an external force, the fixing portion 32 further compresses the free end 42 to unlock, and the engaging portion 33 and the guide groove 12 are re-locked after the external force is released. The tooth cross section of first teeth of a cogwheel 121 is the equilateral triangle setting to form the acute angle profile of tooth, the acute angle tooth of first teeth of a cogwheel 121 and the acute angle tooth of latch 31 can mesh and realize that one-way angle card is dead, because reset function of reset spring 6, the positive sliding resistance in slope inclined plane of acute angle tooth is little, is locking state on the contrary, realizes multi-gear stop.

In this embodiment, the connection between the fitting portion 221 and the mounting portion 222 is provided with a first fastening point 2211 for fastening the locking end 41 and a second fastening point 2221 for fastening the fastening portion 32, respectively.

As shown in fig. 6, the rotating plate 2 is rotated by an external force, the latch 31 is engaged with the first gear teeth 121 in the initial state and the intermediate state, and the fixing portion 32 continuously compresses the free end 42 in the process; in the limit state, the second locking point 2221 locks the fixing portion 32, the mating portion 33 and the guide slot 12 are in a separated state, and after the external force is released, the whole rotating plate 2 reversely rotates under the action of the return spring 6 until reset, the position of the fixing portion 32 is unchanged, and the locking tooth 31 is in a state separated from the first gear tooth 121. When the rotating plate 2 returns to the original position, the acting force of the return spring 6 is eliminated, and the free end 42 is still in the limit compression state, and the free end reacts to the fixed portion 32, so that the fixed portion 32 is separated from the second clamping point 2221, and the initial clamping tooth 31 is synchronously restored to the state of being engaged and locked with the first gear tooth 121.

Example 2

As shown in fig. 7 to 9, this embodiment is different from embodiment 1 in that:

the number of the fixed plates 1 is two and the fixed plates are arranged in parallel, the number of the rotating plates 2 is two and the rotating plates are distributed in parallel, the two rotating plates 2 are positioned between the two fixed plates 1, the rear ends of the fixed plates 1 are directly provided with fixed bases, and the rear ends of the rotating plates 2 are also provided with movable bases.

The advantage of this embodiment is that the length of the overall hinge structure is reduced, and the hinge structure of this embodiment is therefore suitable for use in a lighter and more portable chair armrest than the structure of embodiment 1.

Example 3

As shown in fig. 10, the present embodiment provides a seat armrest to which the hinge structure of embodiment 2 is applied, specifically including a fixed lining plate 100, a movable lining plate 200, and a bracket 300; the lower end of the fixed lining plate 100 is fixedly connected with the bracket 300, and a fixed plate 1 is fixedly connected in the fixed lining plate 100; one end of the movable liner 200 is hinged to the side end of the fixed liner 100 away from the bracket 300, and a rotating plate 2 is fixedly connected in the movable liner 200. Through the hinge structure, the movable liner 200 can be adjusted at multiple angles, and when the movable liner 200 is rotated at a certain angle in one direction, the movable liner 200 is locked on the fixed liner 100 after the external force is released, thereby realizing one-way intermittent rotation.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. A hinge structure, comprising:

the fixing plate (1), the fixing plate (1) is provided with a first connecting hole (11) and a guide groove (12), and first gear teeth (121) are arranged in the guide groove (12);

a rotating plate (2), wherein a second connecting hole (21) and a mounting groove (22) which are respectively corresponding to the first connecting hole (11) and the guide groove (12) are arranged on the rotating plate (2);

the clamping block (3), the clamping block (3) is provided with a clamping tooth (31) meshed with the first gear tooth (121);

the elastic piece (4) is arranged in the mounting groove (22) and acts on the clamping block (3);

the pin shaft (5) respectively penetrates through the first connecting hole (11) and the second connecting hole (21) and is fixedly connected with the fixed plate (1);

and a return spring (6), wherein the return spring (6) deforms and acts on the rotating plate (2) when the rotating plate (2) rotates around the central axis of the pin shaft (5).

2. A hinge structure according to claim 1, characterized in that said latch (3) further comprises a fixing portion (32) provided in said mounting groove (22) and a fitting portion (33) inserted in said guide groove (12); the spring (4) comprises a locking end (41) and a free end (42).

3. A hinge structure according to claim 2, wherein said mounting groove (22) includes a fitting portion (221) for fixing said locking end (41), and a mounting portion (222) for inserting said fixing portion (32) and communicating with said fitting portion (221), said free end (42) extending into said mounting portion (222) and abutting said fixing portion (32).

4. A hinge structure according to claim 3, characterized in that the junction of the fitting part (221) and the mounting part (222) is provided with a first snap point (2211) for fixing the locking end (41) and a second snap point (2221) for fixing the fixing part (32), respectively.

5. A hinge structure according to claim 4, characterized in that the external force rotates the rotating plate (2) until the second clamping point (2221) clamps the fixing part (32), the engaging part (33) and the guide groove (12) are in a separated state, and the rotating plate (2) rotates reversely under the action of the return spring (6) until reset after the external force is released.

6. A hinge construction according to claim 2, characterized in that the side of the guide groove (12) facing away from the first connecting hole (11) is curved and is formed with the first gear teeth (121).

7. A hinge structure according to claim 6, characterized in that said free end (42) acts on the fixed portion (32) when said first tooth (121) and said tooth (31) are engaged, thereby locking said cooperating portion (33) and said guide groove (12) to each other; when the rotating plate (2) is rotated by an external force, the fixing portion (32) further compresses the free end (42) to unlock, and the engaging portion (33) and the guide groove (12) are locked again after the external force is released.

8. A hinge structure according to claim 1, characterized in that the end of the pin (5) has a slot (51), and that one end of the return spring (6) is inserted into the slot (51).

9. A hinge construction according to claim 1, characterized in that the first connecting hole (11) is provided with an internal thread (111) and the pin (5) is provided with an external thread (52) cooperating with the internal thread (111).

10. A chair armrest comprising a hinge structure as claimed in any one of claims 1 to 9.