CN220988204U - Angle adjusting mechanism and chair - Google Patents

Abstract

The utility model discloses an angle adjusting mechanism and a chair. The angle adjusting mechanism comprises a first hinge assembly, a second hinge assembly, a first limiting assembly and a second limiting assembly. The second hinge assembly is hinged with the first hinge assembly, the first limiting assembly is connected to the first hinge assembly, and the second limiting assembly is provided with a first position and a second position. When the second limiting assembly is positioned at the first position, the second hinge assembly can rotate in a first rotating stroke relative to the first hinge assembly. When the second limiting assembly is positioned at the second position, the second limiting assembly is coupled with the first limiting assembly, so that the second hinge assembly can rotate in a second rotation stroke relative to the first hinge assembly, and the first rotation stroke is larger than the second rotation stroke. The setting of the second limiting assembly enables the angle adjusting mechanism to have a plurality of rotation ranges, and the convenience and the comfort level of the angle adjusting mechanism for adjusting angles in different application scenes are improved.

Description

Angle adjusting mechanism and chair

Technical Field

The utility model relates to the technical field of furniture, in particular to an angle adjusting mechanism and a chair.

Background

In the prior art, the angular adjustment range of the angular adjustment mechanism of a chair armrest or the like is generally uniquely fixed. Taking a chair as an example, the chair body may be provided with different angles to enable the chair to be used in different scenarios. Such as the chair back standing upright to adapt to daily use, or the chair back lying flat to adapt to the use requirement of lying down. In different scenes, the chair also has different requirements on the adjustment of the angle of the armrests, the angle of the armrests required to be adjusted when the chair back is upright is generally smaller, and the angle of the armrests required to be adjusted when the chair back is flat is generally larger. On the one hand, in an application scene requiring a smaller angle adjusting range, the angle adjusting mechanism with the single angle adjusting range is overlarge in adjusting stroke, so that the adjustment is not accurate enough and convenient. On the other hand, in the application scene that needs great angle adjustment scope, the angle adjustment mechanism of single angle adjustment scope often makes chair handrail adjust not in place because the adjustment stroke is too little, and the convenience of angle adjustment in different application scenes greatly reduced.

Disclosure of utility model

The utility model mainly aims to provide an angle adjusting mechanism and a chair, which can improve the convenience of the angle adjusting mechanism in use in different scenes.

In order to achieve the above objective, the present utility model provides an angle adjusting mechanism, which includes a first hinge assembly, a second hinge assembly, a first limiting assembly and a second limiting assembly. And the second hinge assembly is hinged with the first hinge assembly. The first limiting component is connected to the first hinge component. The second stop assembly is movable relative to the first hinge assembly between a first position and a second position. The second limiting component is separated from the first limiting component when being in the first position, so that the second hinge component can rotate in a first rotating stroke relative to the first hinge component, and the second limiting component is coupled with the first limiting component when being in the second position, so that the second hinge component can rotate in a second rotating stroke relative to the first hinge component, and the first rotating stroke is larger than the second rotating stroke.

In some embodiments, the second rotation stroke is located within the first rotation stroke, wherein an angle of rotation corresponding to the second hinge assembly within the first rotation stroke is a first central angle α, and an angle of rotation corresponding to the second hinge assembly within the second rotation stroke is a second central angle β, the first central angle α and the second central angle β satisfy: alpha is more than or equal to 2 beta.

In some embodiments, the second stop assembly is movable from the first position to the second position relative to the second hinge assembly.

In some embodiments, the second stop assembly is rotatable relative to the second hinge assembly from the first position to the second position.

In some embodiments, the second limiting component includes a driving portion and a clamping portion, the clamping portion is hinged to the first hinge component, the clamping portion has a first end and a second end which are oppositely disposed, and the driving portion is used for pushing the first end so that the second end can rotate from the first position to the second position.

In some embodiments, the first limiting component further includes a first elastic portion, the first elastic portion is connected to the first hinge component, the first limiting component can rotate relative to the first hinge component, and the first elastic portion can generate a restoring force opposite to the rotation direction.

In some embodiments, the second limiting assembly further includes a second elastic portion having one end connected to the first hinge assembly, the second elastic member being configured to enable the second end to rotate from the second position to the first position when the driving portion is separated from the first end.

In some embodiments, the first limiting component comprises a limiting disc with a first groove, the limiting disc can rotate relative to the first hinge component, one end of the second hinge component is arranged in the first groove, the limiting disc is provided with a first limiting part, when the second limiting component is in a first position, the second end is separated from the limiting disc, and when the second limiting component is in a second position, the second end can be abutted with the first limiting part, so that the limiting disc can limit the rotation angle of the second hinge component. In some embodiments, the spacing disc further comprises a second spacing portion, the first hinge assembly has a second groove, and the second spacing portion is capable of abutting a wall surface of the second groove.

In some embodiments, the first hinge assembly includes a fixed shaft and a first gear having a first through hole, the first spacing assembly has a second through hole, the fixed shaft is threaded through the first through hole and the second through hole, the second hinge assembly is hinged to the fixed shaft, and the second hinge assembly includes movable teeth for meshing with the first gear.

In some embodiments, the angle adjusting mechanism further includes a third elastic portion having one end connected to the fixed shaft and the other end connected to the second hinge assembly, the third elastic portion being configured to provide a restoring force to the movable teeth.

In another aspect, the application provides a chair comprising an angular adjustment mechanism according to any of the embodiments described above.

Compared with the prior art, the utility model has the beneficial effects that:

In the technical scheme of the application, the angle adjusting mechanism comprises a first hinge assembly, a second hinge assembly, a first limiting assembly and a second limiting assembly. The second hinge assembly is hinged with the first hinge assembly to enable relative rotation between the first hinge assembly and the second hinge assembly. The first limiting assembly is connected to the first hinge assembly, and the second limiting assembly can move to a first position and a second position relative to the first hinge assembly. When the second limiting assembly is positioned at the first position, the second limiting assembly is separated from the first limiting assembly, so that the second hinge assembly can rotate in a first rotation stroke relative to the first hinge assembly. When the second limiting assembly is positioned at the second position, the second limiting assembly is coupled with the first limiting assembly, so that the second hinge assembly can rotate in a second rotation stroke relative to the first hinge assembly, and the first rotation stroke is larger than the second rotation stroke. The setting of the second spacing subassembly makes angle adjustment mechanism have different rotation scope, and when using, the second spacing subassembly is located the first position, and second hinge subassembly and first hinge subassembly can rotate relatively in great first rotation stroke, and the second hinge subassembly can rotate relatively in less second rotation stroke with first hinge subassembly when the second spacing subassembly is located the second position. The setting of the second limiting assembly enables the angle adjusting mechanism to have different angle adjusting ranges, and therefore the angle adjusting mechanism can quickly and conveniently respond to adjusting requirements in different use scenes, and convenience and comfort of the angle adjusting mechanism in different application scenes are greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of an angle adjusting mechanism according to an embodiment of the present utility model;

FIG. 2 is an assembled schematic view of an angle adjustment mechanism according to an embodiment of the present utility model, wherein the second limiting assembly is in the first position;

FIG. 3 is an exploded view of a part of the angle adjusting mechanism according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a first gear according to an embodiment of the present utility model;

FIG. 5 is a schematic structural view of a first limiting component according to an embodiment of the present utility model;

FIG. 6 is a schematic view of an assembled structure of an angle adjustment mechanism according to an embodiment of the present utility model, wherein the second hinge member is located in the first rotation stroke;

Fig. 7 is a schematic diagram illustrating an operation principle of a first angle adjusting mechanism according to an embodiment of the present utility model, where a second limiting component is located at a first position;

FIG. 8 is a schematic view of a hinge portion between a first hinge assembly and a second hinge assembly of an angle adjustment mechanism according to an embodiment of the present utility model, wherein the second limiting assembly is located at a first position;

FIG. 9 is a schematic view of a hinge portion between a first hinge assembly and a second hinge assembly of an angle adjustment mechanism according to an embodiment of the present utility model, wherein the second hinge assembly is located in a first rotation path;

FIG. 10 is a schematic view of an assembled configuration of an angle adjustment mechanism according to an embodiment of the present utility model, wherein the second hinge member is in a second stroke;

FIG. 11 is a schematic diagram illustrating an operation principle of an angle adjusting mechanism according to an embodiment of the present utility model, wherein a second limiting assembly is located at a second position;

fig. 12 is a schematic structural view of an angle adjustment mechanism according to an embodiment of the present utility model, wherein the second limiting assembly is in the second position.

Reference numerals illustrate:

An angle adjustment mechanism 100;

A first hinge assembly 110; a second groove 111; a fixed shaft 112; a first gear 113; a first through hole 1131; a third elastic portion 114;

a second hinge assembly 120; a movable tooth 121;

A first stop assembly 130; a limiting plate 131; a first groove 1311; a first stopper 1312; a second stopper 1313; a second through hole 132; a first elastic portion 133;

a second spacing assembly 140; a driving section 141; a clamping part 142; a first end 1421; a second end 1422; a second elastic portion 143;

a first central angle α;

And a second central angle beta.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the prior art, the angular adjustment range of the angular adjustment mechanism of a chair armrest or the like is generally uniquely fixed. Taking a chair as an example, the chair body may be provided with different angles to enable the chair to be used in different scenarios. Such as the chair back standing upright to adapt to daily use, or the chair back lying flat to adapt to the use requirement of lying down. In different scenes, the chair also has different requirements on the adjustment of the angle of the armrests, the angle of the armrests required to be adjusted when the chair back is upright is generally smaller, and the angle of the armrests required to be adjusted when the chair back is flat is generally larger. On the one hand, in an application scene requiring a smaller angle adjusting range, the angle adjusting mechanism with the single angle adjusting range is overlarge in adjusting stroke, so that the adjustment is not accurate enough and convenient. On the other hand, in the application scene that needs great angle adjustment scope, the angle adjustment mechanism of single angle adjustment scope often makes chair handrail not adjust in place because the adjustment stroke is too little, and the convenience of chair use greatly reduced.

In order to solve the above-mentioned problems, as shown in fig. 1 to 12, the present application provides an angle adjusting mechanism 100, wherein the angle adjusting mechanism 100 includes a first hinge assembly 110, a second hinge assembly 120, a first limiting assembly 130 and a second limiting assembly 140.

As shown in fig. 1, 2 and 3, the second hinge assembly 120 is hinged with the first hinge assembly 110. That is, the second hinge member 120 can rotate relative to the first hinge member 110, and in various embodiments, the first hinge member 110 can be connected to the second hinge member 120 in any suitable hinge manner, so as to enable relative rotation between the first hinge member 110 and the second hinge member 120.

As shown in fig. 2, the first stopper assembly 130 is coupled to the first hinge assembly 110.

As shown in fig. 2, the second spacing assembly 140 may be coupled to the first hinge assembly 110. As shown in fig. 7, 8 and 11, the second stop assembly 140 is capable of position switching between a first position and a second position relative to the first hinge assembly 110. It is understood that the first position and the second position herein refer to the disposed position of the second stop assembly 140 relative to the first hinge assembly 110.

As shown in fig. 7, 8 and 9, the second limiting component 140 is separated from the first limiting component 130 when in the first position, so that the second hinge component 120 can rotate relative to the first hinge component 110 in a first rotation stroke. As shown in fig. 10, 11 and 12, the second stop assembly 140 is coupled to the first stop assembly 130 when in the second position to enable the second hinge assembly 120 to rotate relative to the first hinge assembly 110 within a second rotational stroke, wherein the first rotational stroke is greater than the second rotational stroke. That is, when the second limiting assembly 140 is in the second position, the range of angles in which the first hinge assembly 110 and the second hinge assembly 120 can rotate relative to each other is reduced. In particular, the second rotational travel may be any suitable portion of the first rotational travel, depending on the different needs of the user.

In the present embodiment, the second hinge assembly 120 is hinged to the first hinge assembly 110 to enable relative rotation between the first hinge assembly 110 and the second hinge assembly 120. The first limiting assembly 130 is coupled to the first hinge assembly 110, and the second limiting assembly 140 is capable of moving relative to the second hinge assembly 120 to switch positions between a first position and a second position. The second stop assembly 140 has different stop positions, thereby enabling the relative rotation of the first hinge assembly 110 and the second hinge assembly 120 to be limited to different strokes. In use, when the second limiting assembly 140 is in the first position, the second hinge assembly 120 and the first hinge assembly 110 can rotate relatively in a larger first rotation stroke, and when the second limiting assembly 140 is in the second position, the second hinge assembly 120 and the first hinge assembly 110 can rotate relatively in a smaller second rotation stroke. The setting of second spacing subassembly 140 makes angle adjustment mechanism 100 have different angle adjustment scope, on the one hand, angle adjustment mechanism 100 can both respond fast convenient regulation demand in different use scenes, has improved the convenience of angle adjustment structure in different application scenes greatly, on the other hand, in different use scenes, angle adjustment mechanism 100 can provide different angle adjustment scope for different user demands, has improved the travelling comfort that angle adjustment structure used greatly.

In some embodiments, the first rotational travel may be any travel greater than the second rotational travel, depending on the different needs of the user. As shown in fig. 2, 4 and 5, in the present embodiment, the second rotation stroke is located in the first rotation stroke, and the arrangement of the first rotation stroke and the second rotation stroke overlapping can make the structure of the angle adjustment mechanism 100 more compact. The rotation angle of the second hinge assembly 120 corresponding to the first rotation stroke is a first central angle α, the rotation angle of the second hinge assembly 120 corresponding to the second rotation stroke is a second central angle β, and in order to meet different angle adjustment requirements, the first central angle α and the second central angle β may satisfy: alpha is more than or equal to 2 beta. In some embodiments, the first central angle α may be any suitable multiple of 2 times, 2.5 times, or 3 times the second central angle β, without limitation.

In some embodiments, to switch the second limiting assembly 140 between the first position and the second position, the second limiting assembly 140 may be moved from the first position to the second position or rotated from the first position to the second position. As shown in fig. 7 and 11, in the present embodiment, the second limiting component 140 can rotate from the first position to the second position relative to the first hinge component 110. Specifically, in some embodiments, the second limiting component 140 includes a driving portion 141 and a clamping portion 142, the clamping portion 142 is hinged to the first hinge component 110, the clamping portion 142 has a first end 1421 and a second end 1422 disposed opposite to each other, and the driving portion 141 is configured to push the first end 1421 so that the second end 1422 can rotate from the first position to the second position. That is, the first end 1421 and the second end 1422 are disposed opposite to each other at two sides of the connection point between the clamping portion 142 and the first hinge assembly 110, the driving portion 141 pushes the first end 1421, the first end 1421 drives the second end 1422 to rotate around the hinge axis between the clamping portion 142 and the first hinge assembly 110, and the second end 1422 can be switched between the first position and the second position during rotation. Specifically, a through hole may be disposed between the first end 1421 and the second end 1422 of the clamping portion 142, the first hinge drilling may be provided with a rotation shaft, and the rotation shaft is disposed in the through hole of the clamping portion 142 in a penetrating manner, so that the clamping portion 142 can be switched between the first position and the second position relative to the first hinge assembly 110.

In some embodiments, according to different usage requirements, the first limiting assembly 130 and the second limiting assembly 140 can be switched relative to the first hinge assembly 110, and the first limiting assembly 130 and the second limiting assembly 140 can be switched between the start position and the end position in different manners. Specifically, the first limiting assembly 130 and the second limiting assembly 140 may each be provided with a pushing member to enable the pushing members to switch between the respective start position and the end position, and in some embodiments, the angle adjustment mechanism 100 may also be provided with an elastic member to enable the first limiting assembly 130 and the second limiting assembly 140 to switch between the start position and the end position. As shown in fig. 3 and 12, in the present embodiment, the first limiting component 130 further includes a first elastic portion 133, the first elastic portion 133 is connected to the first hinge component 110, the first limiting component 130 can rotate relative to the first hinge component 110, and the first elastic portion 133 can generate a restoring force opposite to the rotation direction. Specifically, the first elastic portion 133 may be configured as a torsion spring, the first hinge assembly 110 limits the connection post, the torsion spring is sleeved on the connection post, one end of the torsion spring is connected with the first hinge assembly 110, the other end of the torsion spring is connected with other parts of the first limiting assembly 130, the first limiting assembly 130 can rotate along the first rotation direction relative to the first hinge assembly 110, the torsion spring is tensioned when the first limiting assembly 130 rotates, and the elastic force generated by the torsion spring can enable the first limiting assembly 130 to return to the initial position along the direction opposite to the first rotation direction.

As shown in fig. 3 and 12, in the present embodiment, in order to facilitate the return of the clamping portion 142 from the second position to the first position, the second limiting assembly 140 further includes a second elastic portion 143, and one end of the second elastic portion 143 is connected to the first hinge assembly 110, and the other end of the second elastic portion 143 is connected to the first end 1421, so that the second end 1422 can rotate from the second position to the first position when the driving portion 141 is separated from the first end 1421. Specifically, the second elastic portion 143 may also be configured such that one end of the torsion spring second elastic portion 143 is connected to the first hinge member 110, and the other end is connected to the first end 1421. It will be appreciated that the other end of the second resilient portion 143 may be connected to the second end 1422 or any suitable location on the clamping portion 142. The driving portion 141 pushes the first end 1421 to switch the second end 1422 to the second state, the second elastic portion 143 can be stretched, and when the driving portion 141 is separated from the first end 1421, the pushing force provided by the driving portion 141 disappears, and the second end 1422 can rotate from the second position to the first position under the pulling force of the second elastic portion 143.

As shown in fig. 2 and 3, in the present embodiment, the driving portion 141 is configured as a driving rod, the rod body of the driving rod defines a clamping groove, the first end 1421 is abutted against the wall surface of the clamping groove, the driving rod can rotate with the central axis of the driving rod as a rotation axis, and the driving shaft can drive the first end 1421 to rotate when the driving shaft rotates, so that the first end 1421 can drive the second end 1422 to rotate. In some embodiments, the driving portion 141 may also be configured in different forms, specifically, the driving portion 141 may include a slide button, a first link and a second link, where the second hinge assembly 120 is rotationally connected to a portion between two ends of the first link, one end of the first link is connected to the slide button, and the other end of the second link is connected to the second link, and when in use, the slide button slides relative to the second hinge assembly 120, so that the slide button can drive the first link to rotate, and the first link rotates to drive the second link to move, so that the second link deviates from one end of the first link to push the first end 1421, and further the second end 1422 can switch between the first state and the second state.

In some embodiments, to achieve the restriction of the first hinge assembly 110 and the second hinge assembly 120 by the first stopper assembly 130, the first stopper assembly 130 may be provided with a stopper connected to the first hinge assembly 110 or the second hinge assembly 120. When in use, the first hinge assembly 110 and the second hinge assembly 120 rotate relatively, meanwhile, the first hinge assembly 110 or the second hinge assembly 120 drives the first limiting assembly 130 to move, the first limiting assembly 130 is matched with the second limiting assembly 140, when the first limiting assembly 130 moves to the second position, the second limiting assembly 140 can limit the movement of the first limiting assembly 130, and then the rotation of the first hinge assembly 110 can be limited, and finally the relative movement of the first hinge assembly 110 and the second hinge assembly 120 is realized. Specifically, the limiting part may be a groove, a through hole, a connecting column, or the like. As shown in fig. 2 and 5, in the present embodiment, the first limiting component 130 includes a limiting disc 131 having a first groove 1311, the limiting disc 131 can rotate relative to the first hinge component 110, and one end of the second hinge component 120 is disposed in the first groove 1311. The limiting plate 131 is provided with a first limiting portion 1312, and when the second limiting assembly 140 is at the first position, the second end 1422 is separated from the limiting plate 131, so that the first hinge assembly 110 and the second hinge assembly 120 are not limited by the first limiting assembly 130 when rotating. When the second limiting assembly 140 is in the second position, the second end 1422 can abut against the first limiting portion 1312. That is, in the process that the first limiting assembly 130 rotates with the second hinge assembly 120, when the first limiting assembly 130 moves to the second position, the second end 1422 of the second limiting assembly 140 blocks the rotation of the limiting disc 131, so that the rotation of the second hinge assembly 120 connected to the first limiting assembly 130 is also limited, that is, the limiting disc 131 can limit the rotation angle of the second hinge assembly 120, and at this time, the relative rotation of the first hinge assembly 110 and the second hinge assembly 120 is limited in the second rotation stroke.

In some embodiments, to further improve the stability of the first limiting component 130 in limiting the first hinge component 110 and the second hinge component 120, the first limiting component 130 may further be provided with a limiting portion connected to the first hinge component 110. Specifically, as shown in fig. 3, 5 and 12, in the present embodiment, the limiting disc 131 further includes a second limiting portion 1313, the first hinge assembly 110 has a second groove 111, and the second limiting portion 1313 can abut against a wall surface of the second groove 111. Specifically, the second limiting portion 1313 may be any suitable protrusion, and the second limiting portion 1313 penetrates the second groove 111. When the second limiting portion 1313 rotates relative to the first hinge assembly 110, the second limiting portion 1313 slides in the second groove 111, and according to different rotation angle requirements, the second groove 111 can be set to be an arc-shaped groove with different central angles, so that the first hinge assembly 110 and the second hinge assembly 120 can rotate more stably in the first rotation stroke and the second rotation stroke.

In some embodiments, according to different usage requirements, the first hinge assembly 110 and the second hinge assembly 120 may be hinged by different connection manners, and the first hinge assembly 110 and the second hinge assembly 120 may include different components such as gears, shafts, etc. to implement different rotational strokes of the first hinge assembly 110 and the second hinge assembly 120 when the second limiting assembly 140 is located in the first position and the second position. As shown in fig. 2, 3, 4 and 5, in the present embodiment, the first hinge assembly 110 includes a fixed shaft 112 and a first gear 113, the first gear 113 has a first through hole 1131, the first limiting assembly 130 has a second through hole 132, and the fixed shaft 112 is disposed through the first through hole 1131 and the second through hole 132. The second hinge assembly 120 is hinged to the fixed shaft 112, and the second hinge assembly 120 includes movable teeth 121, and the movable teeth 121 are engaged with the first gear 113. The movable tooth 121 is engaged with the first gear 113 during the first rotational stroke when the second limiting assembly 140 is in the first position, and the movable tooth 121 is engaged with the first gear 113 during the second rotational stroke when the second limiting assembly 140 is in the second position. The movable teeth 121 can be re-meshed with the first gear 113 under the pressing action of the limiting disc 131 or any other suitable elastic component, so that the angle adjusting mechanism 100 can perform angle adjustment again in the first rotation stroke. It should be noted that, since the first rotational stroke is greater than the second rotational stroke, and in some embodiments, the second rotational stroke is located within the first rotational stroke, that is, in some embodiments, the first gear 113 may be divided into a first area and a second area, when the second limiting assembly 140 is in the first position, the movable tooth 121 may be engaged with the first gear 113 in the first area and the second area, and when the second limiting assembly 140 is in the second position, the movable tooth 121 may be engaged with the first gear 113 in the second area, that is, the second area corresponds to the second rotational stroke of the second hinge assembly 120. It is understood that in some embodiments, the fixed shaft 112 may be configured as a polygonal shaft to enhance the connection stability of the fixed shaft 112 and the first gear 113, and the first hinge assembly 110 and the second hinge assembly 120 may be further provided with an auxiliary pad or the like connected to the fixed shaft 112 to enhance the hinge stability, which will not be described herein.

In some embodiments, to facilitate rotation and return between the first hinge assembly 110 and the second hinge assembly 120, the angle adjustment mechanism 100 may be provided with a resilient member to meet the automatic return requirement of rotation between the first hinge assembly 110 and the second hinge assembly 120. As shown in fig. 3 and 12, in the present embodiment, the angle adjusting mechanism 100 further includes a third elastic portion 114, one end of the third elastic portion 114 is connected to the fixed shaft 112, the other end is connected to the second hinge assembly 120, and the third elastic portion 114 is configured to provide a restoring force to the movable teeth 121. It will be appreciated that in some embodiments, the second elastic portion 143 may be configured as a coil spring having one end wound around the fixed shaft 112 and the other end connected to the second hinge member 120, and the second hinge member 120 may compress or stretch the coil spring when rotating relative to the first hinge member 110, thereby enabling the coil spring to provide a restoring force for the movable teeth 121 to return to the original position.

In some embodiments, the angle adjustment mechanism 100 may have the following specific operation.

As shown in fig. 6, with the second limiting assembly 140 in the first position, the movable tooth 121 is in the first state in which it is engaged with the first gear 113 at a side of the first gear 113 near the second end 1422. As shown in fig. 7, in the first state, the driving portion 141 is connected to the engaging portion 142, the engaging portion 142 is separated from the first limiting assembly 130, and the first elastic portion 133, the second elastic portion 143, and the third elastic portion 114 are all in the original state. In use, in the first state, the second hinge assembly 120 may be pushed to rotate the second hinge assembly 120 relative to the first hinge assembly 110, at which time the movable teeth 121 can engage with the first gear 113 in a first rotational stroke. Since the movable tooth 121 is disposed through the first groove 1311, the state in which the movable tooth 121 is meshed with the first gear 113 at the side of the first gear 113 away from the second end 1422 is the second state of the angle adjusting mechanism 100. Since the first elastic portion 133 is compressed during the rotation from the first state to the second state, when the pushing force applied to the movable tooth 121 is eliminated, the movable tooth 121 can return to the initial position engaged with the first gear 113 by the action of the first elastic portion 133. In the first state, as shown in fig. 8, the clamping portion 142 is separated from the first limiting component 130, and the first hinge component 110 can move to a side close to the second end 1422 and is not limited by the second end 1422, so that the second hinge component 120 can move in a first rotation stroke relative to the first hinge component 110. Specifically, the rotation direction of the second hinge member 120 may be different according to different requirements, and as shown in fig. 9, the second hinge member 120 may be rotated toward the side near the second end 1422, it is understood that the second hinge member 120 may also be rotated toward the side far from the second end 1422.

When in use, the driving part 141 is rotated, the driving part 141 drives the abutting part to rotate, the second end 1422 of the rotating part moves from the first position to the second position, as shown in fig. 11, the second end 1422 is coupled to the first limiting component 130, and the movable tooth 121 is in a third state on one side of the first groove 1311 close to the second end 1422. In the third state, since the second limiting component 140 can abut against the first limiting component 130, when the second hinge component 120 drives the first limiting component 130 to move, as shown in fig. 11, the first limiting portion 1312 can abut against the second end 1422, so that the second hinge component 120 rotates in the second rotation stroke relative to the first hinge component 110.

Another aspect of the application also contemplates a chair (not shown) that includes the angular adjustment mechanism 100 of any of the embodiments described above. Thanks to the improvement of the angle adjusting mechanism 100, the chair (not shown in the drawings) of the present embodiment has the same technical effects as the angle adjusting mechanism 100, and will not be described again here.

It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is included in the embodiment of the present utility model, the directional indication is merely used to explain a relative positional relationship, a movement condition, and the like between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or", "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B ", including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The foregoing description of the preferred embodiments of the present utility model and the following description are merely exemplary, and are not intended to limit the scope of the utility model, as long as the utility model is conceived in light of the present utility model, the equivalent structural changes, or intermediate/indirect applications, made by the description of the utility model and the accompanying drawings are included in the scope of the utility model.

Claims (10)

1. An angle adjustment mechanism, comprising:

a first hinge assembly;

A second hinge assembly hinged with the first hinge assembly;

the first limiting assembly is connected to the first hinge assembly;

A second limit assembly configured to be movable relative to the first hinge assembly between a first position and a second position;

The second limiting component is separated from the first limiting component when being in the first position, so that the second hinge component can rotate in a first rotating stroke relative to the first hinge component, and the second limiting component is coupled with the first limiting component when being in the second position, so that the second hinge component can rotate in a second rotating stroke relative to the first hinge component, and the first rotating stroke is larger than the second rotating stroke.

2. The angle adjustment mechanism of claim 1, wherein,

The second rotating stroke is located in the first rotating stroke, wherein the corresponding rotating angle of the second hinge assembly in the first rotating stroke is a first central angle alpha, the corresponding rotating angle of the second hinge assembly in the second rotating stroke is a second central angle beta, and the first central angle alpha and the second central angle beta meet the following conditions: alpha is more than or equal to 2 beta.

3. The angle adjustment mechanism of claim 1, wherein,

The second limiting assembly is movable from the first position to the second position relative to the second hinge assembly;

Or alternatively, the first and second heat exchangers may be,

The second spacing assembly is rotatable relative to the second hinge assembly from the first position to the second position.

4. The angle adjustment mechanism of claim 1, wherein,

The second limiting assembly comprises a driving part and a clamping part, the clamping part is hinged to the first hinging assembly, the clamping part is provided with a first end and a second end which are oppositely arranged, and the driving part is used for pushing the first end so that the second end can rotate from the first position to the second position.

5. The angle adjustment mechanism of claim 4, wherein,

The first limiting assembly further comprises a first elastic part, the first elastic part is connected to the first hinge assembly, the first limiting assembly can rotate relative to the first hinge assembly, and the first elastic part can generate a restoring force opposite to the rotating direction;

and/or the number of the groups of groups,

The second limiting assembly further comprises a second elastic portion, one end of the second elastic portion is connected to the first hinge assembly, and the second elastic portion is used for enabling the second end to rotate from the second position to the first position when the driving portion is separated from the first end.

6. The angle adjustment mechanism of claim 4, wherein,

The first limiting assembly comprises a limiting disc with a first groove, the limiting disc can rotate relative to the first hinging assembly, one end of the second hinging assembly is arranged on the first groove, the limiting disc is provided with a first limiting part, the second end is separated from the limiting disc when the second limiting assembly is positioned at the first position, and the second end can be abutted to the first limiting part when the second limiting assembly is positioned at the second position, so that the limiting disc can limit the rotation angle of the second hinging assembly.

7. The angle adjustment mechanism of claim 6, wherein,

The limiting disc further comprises a second limiting part, the first hinge assembly is provided with a second groove, and the second limiting part can be abutted with the wall surface of the second groove.

8. The angle adjustment mechanism of claim 1, wherein,

The first hinge assembly comprises a fixed shaft and a first gear, the first gear is provided with a first through hole, the first limiting assembly is provided with a second through hole, the fixed shaft penetrates through the first through hole and the second through hole, the second hinge assembly is hinged with the fixed shaft, the second hinge assembly comprises movable teeth, and the movable teeth are used for being meshed with the first gear.

9. The angle adjustment mechanism of claim 8, wherein,

The angle adjusting mechanism further comprises a third elastic part, one end of the third elastic part is connected with the fixed shaft, the other end of the third elastic part is connected with the second hinge assembly, and the third elastic part is used for providing restoring force for the movable teeth.

10. A chair is characterized in that,

Comprising an angle adjustment mechanism according to any of claims 1 to 9.