CN210130612U

CN210130612U - Chair armrest

Info

Publication number: CN210130612U
Application number: CN201920385622.9U
Authority: CN
Inventors: 胡国强
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-25
Filing date: 2019-03-25
Publication date: 2020-03-10
Anticipated expiration: 2029-03-25

Abstract

The utility model discloses a chair armrest, which comprises an elbow bearing section for bearing the elbow of a user and an arm bearing section for bearing the forearm of the user, wherein the elbow bearing section is connected with a chair; the arm bearing section is connected with the elbow bearing section through a movable connecting structure, and the arm bearing section can rotate to the space above the elbow bearing section around the movable connecting structure; and a hovering locking mechanism for locking the rotated arm bearing section is arranged between the elbow bearing section and the arm bearing section. The utility model discloses a chair armrest can hover on suitable high position according to user's needs, provides the comfortable support of adaptability for user's arm.

Description

Chair armrest

Technical Field

The utility model relates to a seat, concretely relates to armrest.

Background

In order to improve the comfort of the seat, the conventional seat is generally provided with armrests for supporting the arms of the user and improving the comfort of the user. Generally, the existing seat arm rests are mainly classified into a fixed arm rest and a movable arm rest, wherein the movable arm rest can adjust the position of the arm rest relative to the seat, thereby performing folding and unfolding actions; for example, the utility model with the publication number CN 208101783U discloses "an armrest structure", in which one end of an armrest is hinged on a seat, and the other end is a free end extending outward; when the user needs to use the armrest, the free end of the armrest can be pushed upwards to rotate around the hinged end to the hovering height, so that the arm can be supported on the armrest. The armrest structure is designed to enable the armrest to be stored when not in use, so that the armrest does not occupy the space of a seat, but the armrest can only hover at a preset fixed position in the height direction when in use, the arm of a user can only be placed on the armrest according to a relatively fixed posture, but the arm of the user can present different postures in different use occasions, for example, the arm of the user can present different most comfortable postures when the user looks at a mobile phone, clicks a keyboard, plays games, reads books and the like, but the existing seat armrest cannot provide adaptive comfortable support for diversified arm postures.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that above-mentioned exists, provide a chair armrest, this chair armrest can hover on suitable high position according to user's needs, provides the comfortable support of adaptability for user's arm.

The purpose of the utility model is realized through the following technical scheme:

a chair armrest comprising an elbow bearing segment for supporting an elbow of a user and an arm bearing segment for supporting an forearm of a user, wherein the elbow bearing segment is connected to a chair;

the arm bearing section is connected with the elbow bearing section through a movable connecting structure, and the arm bearing section can rotate to the space above the elbow bearing section around the movable connecting structure; and a hovering locking mechanism for locking the arm bearing section when the arm bearing section rotates to a required position is arranged between the elbow bearing section and the arm bearing section.

The working principle of the seat armrest is as follows:

in use, the elbow of the user's arm rests on the elbow-bearing segment and the forearm of the arm rests on the arm-bearing segment. The user can turn the arm bearing section to a desired height according to the use requirement of the user, and then the arm bearing section is fixed at the current position through the hovering locking mechanism, so that the posture of the forearm is changed, and the adaptive comfortable support is provided for the arm of the user.

The utility model discloses a preferred scheme, wherein, swing joint structure is rotation connection structure, and this rotation connection structure's the rotation central axis is mutually perpendicular with the length direction the central axis of handrail, the length direction of handrail indicates the length direction when the elbow supporting section in the handrail and the arm supporting section expand into straight state. When the user uses the handrail of the utility model, the small arm is supported on the surface of the bearing arm section, and the direction of the supporting force of the bearing arm section to the small arm is vertical to the surface of the bearing arm section; in this preferred embodiment, it is assumed that the elbow bearing section and the arm bearing section of the armrest extend in the front-back direction of the user when the elbow bearing section and the arm bearing section are unfolded into a flat state, and the entire armrest is not rotatable in the left-right direction, so that when the arm bearing section rotates around the rotation central axis of the rotation connecting structure, the surface of the arm bearing section swings up and down in the front-back direction of the user, and thus when the forearm of the user rotates around the elbow in the front-back direction to adjust the posture, the arm bearing section can provide an adaptive comfortable support for the forearm. Certainly, because the range of motion of forearm relative to elbow is diversified, the forearm may not only need swing from front to back in the use, also need the activity in the left and right direction, for example when both hands hold the cell-phone, both hands can be drawn close to the centre to the forearm all needs the activity in front and back direction, left and right direction and upper and lower direction (it means the forearm all has the partial motion in three direction), in order to adapt to the change of this kind of gesture, on the basis of above-mentioned preferred scheme, can set up the connection structure between elbow bearing section and the seat into the structure that can rotate from side to side, through elbow bearing section relative to seat side to side activity, bolster section relative to elbow bearing section up and down swing, bolster section has the motion of fore and aft direction, left and right direction and upper and lower direction in the space, realizes the adaptive support to the multi-attitude of forearm.

The utility model discloses a preferred scheme, wherein, it is connected with the seat through rotating coupling mechanism to hold the elbow section, the rotation center that rotates coupling mechanism extends along vertical direction, and like this, horizontal rotation can be made round the rotation center of vertical extension to whole handrail, and relative position between adjustment and the user in addition hold the upper and lower pivoted altitude mixture control of arm section, can satisfy user's arbitrary gesture of placing.

Preferably, the rotary connecting mechanism comprises a vertically arranged vertical connecting shaft, the upper end of the vertical connecting shaft is fixedly connected with the elbow bearing section, and the lower end of the vertical connecting shaft is rotatably connected with the seat. Or the upper end of the vertical connecting shaft is rotatably connected with the elbow bearing section, and the lower end of the vertical connecting shaft is fixedly connected with the seat.

The utility model discloses a preferred scheme, wherein, swing joint structure is for rotating connection structure, and this rotation connection structure's the rotation central axis forms with the length direction the central axis of handrail and is greater than 0 and is less than 90 contained angle, the length direction of handrail indicates the elbow supporting section in the handrail and the length direction when the arm supporting section expandes into straight state. In the preferred scheme, the elbow bearing section and the arm bearing section in the armrest extend along the front-back direction of a user when unfolded to be in a straight state, and the whole armrest cannot rotate in the left-right direction, so that when the arm bearing section rotates around the rotating central axis of the rotating connecting structure, the surface of the arm bearing section not only has position change along the front-back direction of the user, but also has position change in the left-right direction of the user, so that the movement in the front-back direction, the left-right direction and the up-down direction is formed, and further the adaptive support is provided for the multi-posture change of the forearm; of course, in order to obtain more flexible posture change, on the basis of the preferred embodiment, the connecting structure between the elbow bearing segment and the seat can be set to be a structure capable of rotating left and right.

The utility model discloses a preferred scheme, wherein, it is connected with the seat through rotating coupling mechanism to hold the elbow section, the rotation center that rotates coupling mechanism extends along the horizontal direction, and like this, whole handrail can do the rotation on the vertical plane round the rotation center that the level extends, and the orientation that holds the elbow section promptly not only is vertical direction, also can be the orientation of tilt up to the gesture of placing that adapts to more differences.

Preferably, the rotary connecting mechanism comprises a horizontal connecting shaft which is horizontally arranged, and the horizontal connecting shaft is fixedly connected with the elbow bearing section and is rotatably connected with the seat. Or the horizontal connecting shaft is fixedly connected with the seat and is rotatably connected with the elbow bearing section.

The utility model discloses a preferred scheme, wherein, hover locking mechanical system includes meshing fixed knot structure and is used for promoting to mesh the hover actuating mechanism that fixed knot constructs to open and close, wherein, meshing fixed knot constructs including tight pulley and fixed fixture block, the tight pulley is fixed on the elbow bearing section, fixed fixture block sets up on the arm bearing section; the fixed wheel is provided with a plurality of fixed teeth which are arranged along the circumferential direction, and the axes corresponding to the fixed teeth are collinear with the rotating central axis of the rotating connecting structure; one end of the fixed clamping block, which is close to the fixed wheel, is provided with at least one clamping tooth meshed with the fixed tooth; the hovering driving mechanism comprises a separation driving piece and an engagement driving piece, wherein the separation driving piece is used for driving the fixed clamping block to be far away from the fixed wheel, and the engagement driving piece is used for driving the fixed clamping block to be pulled to be close to the fixed wheel. Under the non-rotation condition, the fixed wheel is fixed on the elbow bearing section, and the fixed teeth and the clamping teeth are meshed together, so that the fixed clamping block is fixed on the fixed wheel, and the arm bearing section is kept in a fixed state; when the supporting arm section needs to be rotated to adjust the posture, the driving part is firstly separated, so that the fixed clamping block is far away from the fixed wheel, the fixation is released, namely the clamping tooth is far away from the fixed tooth, then the supporting arm section is pushed to rotate to a desired position, the clamping tooth also rotates around the fixed tooth relatively at the moment, namely the rotated clamping tooth corresponds to the fixed tooth at other positions; then the meshing driving piece is driven to enable the fixed clamping block to be close to the fixed wheel, the clamping teeth are meshed with the corresponding fixed teeth and enter the fixed state again, and the bearing arm section is enabled to hover at the position.

Preferably, the meshing driving part is a torsion spring, one end of the meshing driving part is fixedly connected with the separating driving part, the other end of the meshing driving part is fixed with the fixed clamping block, and the middle part of the meshing driving part is sleeved on the fixed shaft of the shell of the bearing arm section.

Furthermore, the separation driving piece is a pull rope, one end of the separation driving piece is connected with the torsion spring, and the other end of the separation driving piece is connected with the button; the button is hinged on the shell of the bearing arm section. When the posture is adjusted to needs rotation support arm section, press the button and can remove the fixed of fixed fixture block, then rotate, loosen the button after rotating the position that corresponds, under the drive of torsional spring, fixed fixture block is fixed on the tight pulley, and the button resets simultaneously, and it is very simple and convenient to operate. In addition, the advantage of connecting the torsion spring between the separate driving member and the fixed clamping block is that the arm supporting section can be prevented from suddenly rotating downwards due to the accidental operation of the button when the arm of the user is supported on the armrest, and the principle is as follows: when the user small arm is supported on the handrail, the fixed clamping block and the fixed wheel are mutually extruded and locked, at the moment, even if the button is operated by mistake, the pull rope pulls the torsion spring, and the arm bearing section cannot fall off because the force of the torsion spring is not enough to pull the fixed clamping block to leave the fixed wheel; and the posture adjustment of the arm bearing section can be realized only by the user consciously operating the button and separating the forearm from the arm bearing section.

Preferably, the separation driving part and the engagement driving part are the same driving part, and the driving part is fixedly connected with the fixed clamping block; therefore, before rotation, the driving part is pulled in a manual mode to drive the fixing clamping block to be far away from the fixing wheel, and after rotation, the driving part is pushed back in a manual mode to drive the fixing clamping block to be clamped on the fixing wheel.

Preferably, the separation driving piece is fixedly connected with the fixed clamping block; the meshing driving piece is a spring or a torsional spring, one end of the meshing driving piece is connected with the fixed clamping block, and the other end of the meshing driving piece is fixed on the shell of the bearing arm section; when the separation driving piece drives the fixed clamping block to be separated from the fixed wheel, the spring or the torsional spring generates elastic deformation, and when the separation driving piece is loosened, the spring or the torsional spring releases potential energy to drive the fixed clamping block to be close to the fixed wheel, so that the clamping teeth are meshed with the fixed teeth.

The utility model discloses a preferred scheme, wherein, be equipped with the guide block on the bearing arm section, be equipped with on this guide block and be used for carrying out the guide way that leads to fixed fixture block, fixed fixture block sets up in the guide way.

Preferably, one end of the guide groove, which is far away from the fixed wheel, is provided with a fixed part, and along the moving direction, the fixed wheel and the fixed part are respectively positioned at two sides of the fixed fixture block, so that the fixed fixture block is limited in the guide groove, and the fixed wheel can be prevented from being excessively far away from the fixed wheel, and an irreversible result is generated.

The utility model discloses a preferred scheme, wherein, locking mechanical system that hovers sets up in the casing inner chamber of bearing arm section.

The utility model discloses a preferred scheme, wherein, the rotation connection structure includes the axis of rotation, the one end that the arm-bearing section and the elbow-bearing section are adjacent each other all is equipped with the connecting portion of being connected with the axis of rotation, and this connecting portion are first connecting portion and second connecting portion respectively; and a limiting structure is arranged between the first connecting part and the second connecting part and comprises a limiting groove arranged on one of the connecting parts and a limiting part arranged on the other connecting part.

The utility model discloses a preferred scheme, wherein, hover locking mechanical system includes joint bar, fixed lasso and lock nut, fixed lasso articulates on the lateral wall of bearing arm section through the articulated shaft, joint bar's one end articulates on the lateral wall of bearing elbow section, and the other end is equipped with the external screw thread, and passes fixed lasso; the locking nut is arranged at one end of the clamping rod provided with the external thread, and the fixed ferrule is positioned between the locking nut and the hinged point of the clamping rod. When the arm bearing section and the elbow bearing section are positioned on the same straight line, the hinge point of the clamping rod is farthest away from the hinge point of the fixed ferrule, and along with the upward rotation (the rotation angle is between 0 and 90 degrees) of the arm bearing section relative to the elbow bearing section, the distance between the hinge point of the clamping rod and the hinge point of the fixed ferrule is gradually reduced, at the moment, the clamping rod also gradually penetrates through the fixed ferrule to extend outwards, and the locking nut is also relatively far away from the fixed ferrule; after the bearing arm section rotates to the corresponding position, the locking nut is rotated to be tightly attached to the fixing sleeve ring, and then fixing can be completed, at the moment, the bearing arm section can be suspended at the current height (only can rotate upwards but not downwards), and a user can stably place an arm on the bearing arm section; if want to reduce the height of bearing arm section and when down rotating the bearing arm section, need rotate lock nut, make it keep away from fixed lasso a certain distance, and the joint pole obtains certain displacement after, the bearing arm section just can rotate. Therefore, through the structure, after the bearing arm section rotates to any position, the locking nut only needs to be rotated to be close to and tightly attached to the fixed ferrule, and then fixation can be completed.

Preferably, the number of the locking nuts is two, and the two locking nuts are respectively arranged on two sides of the fixed ferrule. Therefore, the movement of the clamping rod in two directions can be respectively limited, so that the bearing arm section can not rotate upwards or downwards and is in a completely fixed state; when the bearing arm section is rotated to a specific position to release the fixation, the locking nut which limits the corresponding direction of the position is loosened, so that the bearing arm section is away from the fixed ferrule for a certain distance.

The utility model discloses a preferred scheme, wherein, swing joint structure turns to the structure for the bulb, including connecting rod and bulb, hold arm section and bulb fixed connection, hold elbow section and connecting rod fixed connection. Or, the arm bearing section is fixedly connected with the connecting rod, and the elbow bearing section is fixedly connected with the ball head. The posture adjustment of the arm bearing section relative to the elbow bearing section in multiple directions can be realized through the ball head steering structure, and the purpose of adapting to the multidirectional posture change of the forearm to provide adaptive support is achieved.

A method for realizing multi-posture support for an arm comprises the following steps: arranging the chair armrest into an elbow bearing section for supporting the elbow and an arm bearing section for supporting the forearm, wherein the arm bearing section can rotate relative to the elbow bearing section to the space above the elbow bearing section; when the posture of the small arm needs to be adjusted, the bearing arm section is rotated to a position which can meet the posture support of the small arm at the moment, and the bearing arm section is locked by the hovering locking mechanism.

The utility model discloses a preferred scheme, wherein, when the arm supporting section was in the top space activity of supporting elbow, the arm supporting section all had the branch motion for user's fore-and-aft direction, left and right directions and upper and lower direction. Therefore, the multi-posture change of the forearm can be met, and the adaptability is better.

The utility model discloses a preferred scheme, wherein, will hold the elbow section and set to for the seat can be for direction pivoted structure about to the realization holds the posture change that the arm section is more, satisfies more forearm gesture support demands.

Compared with the prior art, the utility model following beneficial effect has:

1. the utility model provides a chair armrest can hover on the height and the position that the user needs, matches the diversified gesture of putting of user's arm, provides the comfortable support of adaptability for user's arm, improves taking of seat and experiences.

2. The elbow and the forearm of the arm are respectively supported by dividing the armrest into two sections of structures, and the height of the armrest in hovering can be adjusted by turning over the arm-bearing section by taking the elbow-bearing section as a fixed point so as to adapt to different bearing postures, thereby being applicable to various use occasions of users.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of an armrest according to the present invention.

Fig. 2 is a plan view of a first embodiment of the armrest of the present invention.

Fig. 3 is a side view of a first embodiment of the armrest of the present invention.

Fig. 4 is a side view of an armrest according to an embodiment of the present invention in use on a chair.

Fig. 5 is a schematic perspective view of a first internal structure of the armrest according to the present invention.

Figure 6 is a perspective view of the elbow bearing segment and arm bearing segment of figure 5 in rotational connection.

Fig. 7-8 are schematic perspective views of the fixed wheel, the fixed block, and the guide block in fig. 5, wherein fig. 8 is an exploded schematic view.

Fig. 9-10 are plan views of the fixed wheel and fixed latch of fig. 5 secured in two different positions.

Fig. 11 is a schematic perspective view of a second embodiment of the armrest according to the present invention.

Fig. 12 is a plan view of a second embodiment of the armrest of the present invention.

Fig. 13 is a side view of a second embodiment of the armrest of the present invention.

Fig. 14 is a side view of another embodiment of an armrest of the present invention in use on a chair.

Fig. 15 is a schematic perspective view of a second internal structure of the armrest according to the present invention.

Fig. 16 is a schematic perspective view of a third internal structure of the armrest according to the present invention.

Fig. 17 is a perspective view of a fourth internal structure of the armrest according to the present invention.

Figures 18-20 are side views of a second embodiment of a hover lock mechanism of the present invention,

wherein, fig. 18 is a side view of the elbow supporting section and the arm supporting section when they are kept flat, fig. 19 is a side view of the elbow supporting section after it is turned over a certain angle, and fig. 20 is a side view of the elbow supporting section after it is turned over a certain angle and hovers.

Fig. 21-22 are schematic views of the movable connection structure of the present invention adopting a ball head structure, wherein fig. 21 is a schematic view of the elbow supporting section and the arm supporting section being kept at ordinary times, and fig. 22 is a schematic view of the elbow supporting section after being turned over by a certain angle.

Detailed Description

In order to make those skilled in the art understand the technical solution of the present invention well, the present invention will be further described below with reference to the following examples and drawings, but the embodiments of the present invention are not limited thereto.

Example 1

Referring to fig. 1 to 3, the chair arm rest in the present embodiment is provided with two elbow supporting sections 1 symmetrically arranged at the left and right sides of the chair and including an elbow supporting section 1 for supporting the elbow of the user and an arm supporting section 2 for supporting the forearm of the user, wherein the elbow supporting section 1 is rotatably connected with the chair; the elbow supporting section 2 is connected with the elbow supporting section 1 through a movable connecting structure, and the elbow supporting section 2 can rotate to the space above the elbow supporting section 1 around the movable connecting structure; a hovering locking mechanism used for prompting the arm bearing section 2 to hover after the arm bearing section 2 rotates at any angle is arranged between the elbow bearing section 1 and the arm bearing section 2.

In use, a user may place the elbow of an arm on elbow bearing segment 1 and the forearm of the arm on arm bearing segment 2. The user can turn up the arm bearing segment 2 to a desired height according to the actual situation of the user, and then fix the arm bearing segment 2 at the current position through the hovering locking mechanism, so that the posture of the forearm is changed, and the adaptive comfortable support is provided for the arm of the user.

Referring to fig. 1-3, the movable connection structure is a rotary connection structure, a rotation central axis B of the rotary connection structure is perpendicular to a length direction central axis a of the armrest, and the length direction of the armrest is the length direction of the armrest when the elbow bearing segment 1 and the arm bearing segment 2 are unfolded to be in a straight state. When the user uses the handrail of the utility model, the forearm is supported on the surface of the arm bearing section 2, and the direction of the supporting force of the arm bearing section 2 to the forearm is vertical to the surface of the arm bearing section 2; in this preferred scheme, assume that elbow bearing segment 1 and arm bearing segment 2 in the handrail are extended along user's fore-and-aft direction when expanding into straight state, and whole handrail can not rotate in left and right direction, when arm bearing segment 2 rotates around the rotation central axis B of rotation connection structure, the surface of arm bearing segment 2 is along user's fore-and-aft direction going up and down swing to user's forearm rotates around the elbow in the fore-and-aft direction when adjusting the gesture, arm bearing segment 2 can provide the comfortable support of adaptability for the forearm. Certainly, because the range of motion of forearm relative to elbow is diversified, the forearm may not only need swing from front to back in the use, also need the activity in the left and right directions, for example when both hands hold the cell-phone, both hands can be drawn close to the centre to the forearm all needs the activity in front and back direction, left and right direction and upper and lower direction (it means the forearm all has the partial motion in three directions), in order to adapt to the change of this kind of gesture, on the basis of above-mentioned scheme, can set up the connection structure between elbow bearing section 1 and the seat into the structure that can rotate from side to side, through elbow bearing section 1 relative to seat side to move, arm bearing section 2 relative to elbow bearing section 1 to swing from top to bottom, arm bearing section 2 has the motion of fore and aft direction, left and right direction and upper and lower direction in the space, realizes the adaptive support to forearm multi-attitude.

Referring to fig. 4, the elbow bearing section 1 is connected to the seat through a rotation connection mechanism, and a rotation center of the rotation connection mechanism extends along a vertical direction, so that the whole armrest can horizontally rotate around the rotation center extending vertically, and the relative position between the armrest and the user can be adjusted, and the height of the elbow bearing section 2 can be adjusted by the up-and-down rotation of the armrest section, so that the user can be placed at any posture.

The rotary connecting mechanism comprises a vertically placed vertical connecting shaft, the upper end of the vertical connecting shaft is fixedly connected with the elbow bearing section 1, and the lower end of the vertical connecting shaft is rotatably connected with the seat. Or the upper end of the vertical connecting shaft is rotatably connected with the elbow bearing section 1, and the lower end of the vertical connecting shaft is fixedly connected with the seat.

Referring to fig. 5-10, the hovering locking mechanism is disposed in an inner cavity of a housing of the arm bearing segment 2, and includes an engaging fixed structure and a hovering driving mechanism for causing the engaging fixed structure to open and close, wherein the engaging fixed structure includes a fixed wheel 3 and a fixed fixture block 4, the fixed wheel 3 is fixed on the elbow bearing segment 1, and the fixed fixture block 4 is disposed on the arm bearing segment 2 (since the fixed wheel 3 and the fixed fixture block 4 move relatively during operation, the fixed fixture block 4 can also be fixed on the elbow bearing segment 1, and the fixed wheel 3 can be disposed on the arm bearing segment 2); the fixed wheel 3 is provided with a plurality of fixed teeth 3-1 which are distributed along the circumferential direction, and the axes corresponding to the fixed teeth 3-1 are collinear with the rotation center of the rotation connecting structure; one end of the fixed fixture block 4 close to the fixed wheel 3 is provided with a plurality of clamping teeth 4-1 meshed with the fixed teeth 3-1; the hovering driving mechanism comprises a separation driving piece 5 for driving the fixed fixture block 4 to be far away from the fixed wheel 3 and an engagement driving piece 6 for driving the fixed fixture block 4 to be pulled to be close to the fixed wheel 3. Under the non-rotation condition, the fixed wheel 3 is fixed on the elbow bearing section 1, and the fixed teeth 3-1 and the clamping teeth 4-1 are meshed together, so that the fixed clamping block 4 is fixed on the fixed wheel 3, and the arm bearing section 2 is kept in a fixed state; when the arm-bearing section 2 needs to be rotated to adjust the posture, the driving part 5 is separated and driven, so that the fixed clamping block 4 is far away from the fixed wheel 3, the fixation is released, namely the clamping tooth 4-1 is far away from the fixed tooth 3-1, then the arm-bearing section 2 is pushed to rotate to a desired position, at the moment, the clamping tooth 4-1 also rotates around the fixed tooth 3-1 relatively, namely the rotated clamping tooth 4-1 corresponds to the fixed tooth 3-1 at other positions; then the meshing driving piece 6 is driven to enable the fixed clamping block 4 to approach the fixed wheel 3, the clamping teeth 4-1 are meshed with the corresponding fixed teeth 3-1, and the fixed state is achieved again, so that the arm bearing section 2 is suspended at the position.

The meshing driving piece 6 is a torsion spring; the separation driving piece 5 is a pull rope, one end of the separation driving piece is connected with the torsion spring, and the other end of the separation driving piece is connected with the button 7; the button 7 is hinged on the shell of the arm bearing section 2; one end of the meshing driving piece 6 is fixedly connected with the separating driving piece 5, the other end of the meshing driving piece is fixed with the fixed clamping block 4, and the middle part of the meshing driving piece is sleeved on the fixed shaft of the shell of the bearing arm section 2. When the posture is adjusted to needs rotation support arm section 2, press button 7 and can relieve fixed fixture block 4 fixed, then rotate, loosen button 7 after rotating to the position that corresponds, under the drive of torsional spring, fixed fixture block 4 is fixed on tight pulley 3, and button 7 resets simultaneously, and it is very simple and convenient to operate. In addition, the advantage of connecting the torsion spring between the separate driving member 5 and the fixed latch 4 is that it can prevent the arm segment 2 from suddenly rotating downwards due to the accidental operation of the button 7 when the arm of the user is supported on the armrest, and the principle is as follows: when the user's forearm is supported on the armrest, the fixed clamping block 4 and the fixed wheel 3 are mutually squeezed and locked, at this time, even if the button 7 is operated by mistake, the pull rope pulls the torsion spring, and the arm-bearing segment 2 cannot fall off because the force of the torsion spring is not enough to pull the fixed clamping block 4 to leave the fixed wheel 3; and the posture adjustment of the arm bearing section 2 can be realized only by the user consciously operating the button and separating the forearm from the arm bearing section 2.

Referring to fig. 5-10, the arm-supporting segment 2 is provided with a guide block 8, the guide block 8 is provided with a guide groove 8-1 for guiding the fixed fixture block 4, and the fixed fixture block 4 is arranged in the guide groove 8-1.

One end of the guide groove 8-1, which is far away from the fixed wheel 3, is provided with a fixed part 8-2, and the fixed wheel 3 and the fixed part 8-2 are respectively positioned at two sides of the fixed fixture block 4 along the moving direction, so that the fixed fixture block 4 is limited in the guide groove 8-1, and the fixed fixture block can be prevented from being excessively far away from the fixed wheel 3 to generate an irreversible result.

Referring to fig. 5-10, the rotary connection structure comprises a rotary shaft 9, and the adjacent ends of the elbow bearing segment 1 and the arm bearing segment 2 are provided with connection parts connected with the rotary shaft 9, wherein the connection parts are a first connection part 1-1 and a second connection part 2-1 respectively; a limiting structure is arranged between the first connecting part 1-1 and the second connecting part 2-1, and the limiting structure comprises a limiting groove arranged on the first connecting part 1-1 and a limiting part arranged on the second connecting part 2-1.

The method for realizing multi-posture support of the arm by the armrest comprises the following steps: the chair armrest is provided with an elbow bearing section 1 for supporting an elbow and an arm bearing section 2 for supporting a small arm, and the arm bearing section 2 can rotate relative to the elbow bearing section 1 to the space above the elbow bearing section 1; when the posture of the forearm needs to be adjusted, the bearing arm section 2 is rotated to a position which can meet the posture support of the forearm at the moment, and the bearing arm section 2 is locked by using the hovering locking mechanism.

When the arm support segment 2 moves in the space above the support elbow 1, the arm support segment 2 moves in a direction which is different from the front-back direction and the up-down direction of the user. Therefore, the multi-posture change of the forearm can be met, and the adaptability is better.

Example 2

Referring to fig. 11 to 13, unlike embodiment 1, in this embodiment, the movable connection structure is a rotary connection structure, and a rotation central axis B of the rotary connection structure forms an included angle of more than 0 ° and less than 90 ° with a length direction central axis a of the armrest, and the length direction of the armrest is the length direction of the armrest when the elbow bearing segment 1 and the arm bearing segment 2 are unfolded to be in a straight state. In the preferred scheme, if the elbow bearing section 1 and the arm bearing section 2 in the armrest extend along the front-back direction of the user when unfolded to be in a straight state, and the whole armrest cannot rotate in the left-right direction, when the arm bearing section 2 rotates around the rotation central axis B of the rotation connecting structure, the surface of the arm bearing section 2 not only has position change along the front-back direction of the user, but also has position change in the left-right direction of the user, so that the movement in the front-back direction, the left-right direction and the up-down direction is formed, and further, adaptive support is provided for multi-posture change of the forearm; of course, in order to obtain more flexible posture change, on the basis of the preferred embodiment, the connecting structure between the elbow bearing segment 1 and the seat can be set to be a structure capable of rotating left and right.

The rotation central axes B of the rotation connecting structures of the armrests on both sides are symmetrically arranged along the orientation of the seat, and both are inclined toward the inside of the seat.

Example 3

Embodiment 2 is different in that the rotation center axes of the rotation connecting structures of the both side armrests inclined are symmetrically arranged along the orientation of the seat, and both are inclined toward the outside of the seat.

Example 4

Referring to fig. 14, unlike embodiment 1, the rotation center of the rotation connecting mechanism extends along the horizontal direction, so that the whole armrest can rotate on the vertical plane around the rotation center extending horizontally, that is, the elbow rest section 1 is not only oriented in the vertical direction, but also in the upward inclined direction, so as to adapt to more different placing postures.

The rotary connecting mechanism comprises a horizontal connecting shaft 14 which is horizontally arranged, and the horizontal connecting shaft 14 is fixedly connected with the elbow bearing section 1 and is rotatably connected with the seat. Or the horizontal connecting shaft 14 is fixedly connected with the seat and is rotatably connected with the elbow bearing section 1.

Example 5

Referring to fig. 15, unlike embodiment 1, the separation driving member 5 and the engagement driving member 6 are the same driving member, and the driving member is fixedly connected to the fixed block 4; like this, before rotating, through manual mode pulling drive assembly, make it drive fixed fixture block 4 and keep away from tight pulley 3, after rotating, rethread manual mode is backward promoted drive assembly, makes it drive fixed fixture block 4 joint on tight pulley 3.

Example 6

Referring to fig. 16, unlike embodiment 1, the separation driving member 5 is fixedly connected to the fixed latch 4; the meshing driving piece 6 is a spring, one end of the meshing driving piece is connected with the fixed clamping block 4, and the other end of the meshing driving piece is fixed on the shell of the bearing arm section 2; when the separation driving piece 5 drives the fixed clamping block 4 to separate from the fixed wheel 3, the spring generates elastic deformation, and when the separation driving piece 5 is loosened, the spring releases potential energy to drive the fixed clamping block 4 to be close to the fixed wheel 3, so that the clamping teeth 4-1 are meshed with the fixed teeth 3-1.

In addition, referring to fig. 17, the engagement driving member 6 is a torsion spring.

Example 7

Referring to fig. 18 to 20, unlike embodiment 1, the hovering locking mechanism includes a clamping rod 10, a fixing collar 11 and a locking nut 12, the fixing collar 11 is hinged to a side wall of the arm bearing section 2 through a hinge shaft, one end of the clamping rod 10 is hinged to a side wall of the elbow bearing section 1, and the other end is provided with an external thread and passes through the fixing collar 11; the locking nut 12 is arranged at one end of the clamping rod 10 provided with external threads, and the fixing ferrule 11 is positioned between the locking nut 12 and a hinge point of the clamping rod 10. When the arm bearing section 2 and the elbow bearing section 1 are positioned on the same straight line, the hinge point of the clamping rod 10 is farthest away from the hinge point of the fixed ferrule 11, and as the arm bearing section 2 rotates upwards relative to the elbow bearing section 1 (the rotation angle is between 0 and 90 degrees), the distance between the hinge point of the clamping rod 10 and the hinge point of the fixed ferrule 11 is gradually reduced, at the moment, the clamping rod 10 also gradually penetrates through the fixed ferrule 11 to extend outwards, and the locking nut 12 is also relatively far away from the fixed ferrule 11; after the bearing arm section 2 rotates to the corresponding position, the locking nut 12 is rotated to be attached to the fixed sleeve ring 11, and then fixing can be completed, at the moment, the bearing arm section 2 can be suspended at the current height (only can rotate upwards but not downwards), and a user can stably place an arm on the bearing arm section 2; if the height of the arm bearing segment 2 is lowered and the arm bearing segment 2 is rotated downwards, the lock nut 12 needs to be rotated to be away from the fixed ferrule 11 by a certain distance, and the arm bearing segment 2 can be rotated after the clamping rod 10 obtains a certain moving distance. Therefore, with the above structure, after the arm bearing section 2 rotates to any position, the locking nut 12 only needs to be rotated to be close to and tightly attached to the fixing ferrule 11, and then the fixing can be completed.

In addition, the number of the lock nuts 12 may be two, and the two lock nuts are respectively disposed on both sides of the fixing collar 11. Thus, the movement of the clamping rod 10 in two directions can be respectively limited, so that the bearing arm section 2 can not rotate upwards or downwards and is in a completely fixed state; to release the fixing, when the arm segment 2 is rotated to a specific position, the lock nut 12 for restricting the direction corresponding to the position is loosened and separated from the fixed collar 11 by a predetermined distance.

Example 8

Referring to fig. 21 to 22, different from embodiment 1, the movable connection structure is a ball steering structure, and includes a connection rod 15 and a ball 16, the arm bearing segment 2 is fixedly connected to the ball 16, and the elbow bearing segment 1 is fixedly connected to the connection rod 15. Or, the arm bearing section 2 is fixedly connected with the connecting rod 15, and the elbow bearing section 1 is fixedly connected with the ball head 16. The posture adjustment of the arm bearing section 2 relative to the elbow bearing section 1 in multiple directions can be realized through the ball head steering structure, and the purpose of adapting to the multidirectional posture change of the forearm to provide adaptive support is achieved.

The utility model discloses in, except the scheme that above-mentioned embodiment provided, the locking mechanical system that hovers, still a lot of structural scheme that can lock elbow supporting section 1 and arm supporting section 2 in the position of wanting, for example in elbow supporting section 1 with the side at the position that arm supporting section 2 is connected set up the locking hole of circumferencial direction, and set up corresponding locating pin on arm supporting section 2, this locating pin is controlled by control mechanism, can pass in and out the locking hole to will bear elbow supporting section 1 locking in the position of wanting.

The above is the preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. A chair armrest comprising an elbow bearing segment for supporting an elbow of a user and an arm bearing segment for supporting a forearm of a user, wherein the elbow bearing segment is connected to a chair;

2. The chair armrest according to claim 1, wherein the movable connection structure is a rotary connection structure, a rotary central axis of the rotary connection structure is perpendicular to a length direction central axis of the armrest, and the length direction of the armrest is a length direction of the armrest when the elbow bearing segment and the arm bearing segment are unfolded to be in a straight state.

3. A chair armrest according to claim 1 or 2, wherein the elbow rest segment is connected to the chair by a rotary connection, the centre of rotation of which extends in a vertical direction.

4. The chair armrest as claimed in claim 1, wherein the movable connection structure is a rotary connection structure, a rotary central axis of the rotary connection structure forms an included angle of more than 0 ° and less than 90 ° with a length direction central axis of the armrest, and the length direction of the armrest is a length direction of the armrest when the elbow bearing segment and the arm bearing segment are unfolded to a straight state.

5. A chair armrest as claimed in claim 1 or 4, wherein the elbow rest segment is connected to the chair by a rotary connection, the centre of rotation of which extends in a horizontal direction.

6. The chair armrest according to claim 1 or 2, wherein the hovering locking mechanism comprises an engaging fixed structure and a hovering driving mechanism for causing the engaging fixed structure to open and close, wherein the engaging fixed structure comprises a fixed wheel and a fixed fixture block, the fixed wheel is fixed on the elbow bearing segment, and the fixed fixture block is arranged on the arm bearing segment; the fixed wheel is provided with a plurality of fixed teeth which are arranged along the circumferential direction, and the axes corresponding to the fixed teeth are collinear with the axis of the rotation center of the movable connecting structure; one end of the fixed clamping block, which is close to the fixed wheel, is provided with at least one clamping tooth meshed with the fixed tooth; the hovering driving mechanism comprises a separation driving piece and an engagement driving piece, wherein the separation driving piece is used for driving the fixed clamping block to be far away from the fixed wheel, and the engagement driving piece is used for driving the fixed clamping block to be pulled to be close to the fixed wheel.

7. The chair armrest as claimed in claim 6, wherein the engagement driving member is a torsion spring, one end of the torsion spring is fixedly connected with the separation driving member, the other end of the torsion spring is fixedly connected with the fixed clamping block, and the middle part of the torsion spring is sleeved on the fixed shaft of the housing of the arm bearing section.

8. The chair armrest as claimed in claim 7, wherein the separate driving member is a pull cord, one end of which is connected to the torsion spring and the other end of which is connected to the button; the button is hinged on the shell of the bearing arm section.

9. The chair armrest as claimed in claim 6, wherein the arm-supporting segment is provided with a guide block, the guide block is provided with a guide groove for guiding the fixing fixture block, and the fixing fixture block is arranged in the guide groove; the one end of keeping away from the tight pulley on the guide way is equipped with the fixed part, along the direction of removal, is located respectively that fixed fixture block both sides is tight pulley and fixed part.

10. The chair armrest as claimed in claim 2, wherein the rotary connecting structure comprises a rotary shaft, and one ends of the arm bearing segments and the elbow bearing segments adjacent to each other are provided with connecting parts connected with the rotary shaft, wherein the connecting parts are a first connecting part and a second connecting part respectively; and a limiting structure is arranged between the first connecting part and the second connecting part and comprises a limiting groove arranged on one of the connecting parts and a limiting part arranged on the other connecting part.