CN217566356U

CN217566356U - Adjustable arm support device

Info

Publication number: CN217566356U
Application number: CN202220408909.0U
Authority: CN
Inventors: 黄位; 刘岳宇
Original assignee: Nanjing Meichun Medical Co ltd
Current assignee: Nanjing Meichun Medical Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-10-14
Anticipated expiration: 2032-02-28

Abstract

The utility model discloses an arm holds in palm device with adjustable, including the arm support, the arm bracket, open and shut the subassembly and carry out spacing subassembly to the subassembly that opens and shuts, the arm support symmetry respectively sets up the top in the seat left and right sides, the arm bracket is located the left and right sides of seat respectively and is connected with the bottom that lies in the arm support with one side, the subassembly that opens and shuts lies in the below of seat respectively and is connected with the one end that the arm support was kept away from with the arm bracket that lies in one side, can drive the arm bracket and open and shut, spacing subassembly lies in one side of the subassembly that opens and shuts respectively. The opening and closing of the two arm brackets are adjusted by arranging the opening and closing assembly and the limiting assembly which are matched with each other, so that the relative position between the two arm brackets can be adjusted according to specific requirements, the operability space of doctor nursing personnel is further improved, and the stability of a doctor during operation or examination is guaranteed.

Description

Adjustable arm support device

Technical Field

The utility model relates to the field of medical equipment, especially, relate to an adjustable arm holds in palm device.

Background

When carrying out the operation, the operation doctor usually carries out the position of sitting and operates, in present operating chair, because doctor's both hands hold medical instrument and carry out the operation, the arm needs long-time lifting up, and need avoid the shake of arm as far as possible, generally can set up arm support and arm support in the both sides of operating chair and support doctor's arm or elbow, but the arm support that is used for supporting the arm support at present generally fixes the both sides at the seat, the rigidity, can not adjust the relative position between the arm support that is located both sides according to doctor's demand, maneuverability space is little, so need one kind of arm support that can open and shut relatively, adjust distance and angle between two arm supports urgent need.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problem that prior art exists, the utility model aims to provide an adjustable arm holds in palm device through the subassembly that opens and shuts that sets up and be connected with the arm bracket, can open and shut the arm bracket that lies in the seat both sides according to the concrete user demand of doctor to the arm that drives arm bracket top holds in the palm can keep away from each other or be close to, carries on spacing also having ensured the stability of doctor when doing the operation or inspection through spacing subassembly simultaneously.

In order to solve the technical problem, the utility model discloses a technical scheme as follows: an adjustable arm rest apparatus comprising:

the arm supports are respectively and symmetrically arranged above the left side and the right side of the seat plate;

the arm brackets are respectively positioned at the left side and the right side of the seat plate and are connected with the bottoms of the arm brackets positioned at the same side;

the opening and closing components are respectively positioned below the seat plate and connected with one end of the arm bracket positioned at the same side, which is far away from the arm bracket, and can drive the arm bracket to open and close;

and the limiting assemblies are respectively positioned on one sides of the opening and closing assemblies and are used for limiting the opening and closing assemblies.

As a further improvement of the present invention, the opening and closing assembly includes:

the armrest shaft heads are symmetrically fixed at the left end and the right end of the bottom of the seat plate and are close to the front of the seat plate, and the outer wall of one end, far away from the seat plate, of each armrest shaft head is provided with a placing groove along the circumferential direction of the armrest shaft head;

the shaft sleeve is sleeved on the outer peripheral wall of the handrail shaft head, and the outer wall of the shaft sleeve is fixedly connected with one end, far away from the arm support, of the arm support;

one end of the first annular piece is positioned in the shaft sleeve and fixedly connected with the inner wall of the shaft sleeve, the other end of the first annular piece extends upwards to be positioned above the shaft sleeve and is movably sleeved on the outer peripheral wall of the handrail shaft head, a first annular step is formed by the top end of the first annular piece and the top end of the shaft sleeve, and a second annular step is formed by the bottom end of the first annular piece and the inner wall of the shaft sleeve;

and the clamp spring is positioned in the placing groove of the handrail shaft head and positioned below the second annular step and used for clamping the shaft sleeve connected with the first annular piece.

As a further improvement, the outer wall swing joint of axle sleeve has damping screw, another tip of damping screw runs through behind the outer wall of axle sleeve and first loop forming element in proper order inconsistent with the outer wall of handrail spindle nose.

As a further improvement, the damping screw includes that the installation department and the movable sleeve of the through-hole threaded connection who offers with the axle sleeve outer wall establish dish spring and damping piece on the installation department, the outer wall of installation department is provided with the mounting hole, the damping piece is kept away from the one end of dish spring and is inconsistent with the outer wall of handrail spindle nose.

As a further improvement, the peripheral wall of the handrail spindle head and the upper cover located on the clamp spring are provided with oil-free bushes.

As a further improvement of the utility model, the inner wall that first loop forming element is located the one end of axle sleeve along the circumferencial direction of first loop forming element is provided with the bearing step.

As a further improvement of the present invention, the limiting mechanism includes:

the brake ring comprises a second ring-shaped piece with an opening, a first connecting lug arranged at the first free end of the second ring-shaped piece and a second connecting lug arranged at the second free end of the second ring-shaped piece, and the second ring-shaped piece is sleeved on the outer peripheral wall of the first ring-shaped piece and is positioned on the first annular step;

the limiting block is positioned on one side of the first connecting lug and is rotationally connected with the bottom of the seat plate;

the fixing block is positioned on one side of the second connecting lug and is fixedly connected with the bottom of the seat plate;

the armrest brake rod is fixed at one end of the outer side of the limiting block;

when the handrail brake lever drives one end of the limiting block to be abutted to the first connecting lug, the first connecting lug and the second connecting lug are close to each other, the second ring piece is locked with the first ring piece, when the handrail brake lever drives one end of the limiting block to be separated from the first connecting lug, the first connecting lug and the second connecting lug are far away from each other, and the second ring piece is separated from the first ring piece.

As a further improvement, the terminal surface of stopper and the contact of first connection ear is outside convex cambered surface, the outer wall connection that first connection ear is close to the stopper has two spacing bolts, when handrail brake lever drives the stopper and rotates, the cambered surface of stopper overturns between two spacing bolts.

As a further improvement, a terminal surface swing joint that the second engaging lug was kept away from to the fixed block has adjusting bolt, adjusting bolt's the terminal outside that lies in the second engaging lug after transversely running through the fixed block.

As a further improvement, stopper and handrail brake lever pass through the screw and can dismantle the connection, a terminal surface of stopper is provided with and supplies handrail brake lever male installation through-hole, the bottom of stopper be provided with the installation through-hole communicate with each other and with the locking hole of screw looks adaptation, the one end outer wall that handrail brake lever is located the installation through-hole be provided with the first spacing hole of screw looks adaptation.

As a further improvement, the arm bracket includes the support outer pole and can be in the support outer pole flexible support pole from top to bottom, the bottom fixed connection that the top of pole and arm held in the palm in the support, the bottom of supporting the outer pole and the outer wall fixed connection of axle sleeve.

As a further improvement of the present invention, a sleeve is connected between the outer support rod and the inner support rod, the outer wall of the sleeve is connected with a dividing pin, one end of the dividing pin located on the handle is located on the outer side wall of the sleeve, the other end of the dividing pin transversely penetrates through the outer wall of the sleeve and is located in the sleeve, the outer walls of two inner support rods viewed are respectively provided with a limiting groove along the length direction of the inner support rod, and a plurality of second limiting holes matched with the dividing pin are uniformly arranged in the limiting grooves;

when the handle of the index pin moves towards the direction far away from the sleeve, the inner support rod can slide up and down in the outer support rod, and when the handle of the index pin moves towards the direction close to the sleeve, the other end of the index pin is abutted to one of the second limiting holes.

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

1. the utility model relates to an arm holds in palm device with adjustable through the subassembly that opens and shuts that sets up and be connected with the arm bracket, adjusts the opening and shutting that is located two arm brackets of seat both sides to make doctor adjust the relative position between two arm brackets according to different user demands, improved doctor's maneuverability space, carry out spacing stability that has also ensured doctor when doing operation or inspection through spacing subassembly to the subassembly that opens and shuts simultaneously.

2. The utility model relates to an arm holds in palm device with adjustable is through setting up the structure with arm support height-adjustable festival to make the arm hold in the palm the height-adjustable apart from ground, further enlarged medical personnel's application range.

3. The utility model relates to an arm holds in palm device with adjustable through the pressure of adjusting the damping screw to the handrail spindle nose, produces certain frictional resistance when the axle sleeve is rotatory to the arm support that has prevented to be connected with axle sleeve outer wall is too nimble when rotating.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is an exploded view of the middle opening and closing assembly and the limiting assembly of the present invention;

FIG. 3 is a schematic view of the connection between the shaft head and the brake ring of the middle armrest of the present invention;

FIG. 4 is a schematic view of the connection between the middle arm bracket and the arm support and the shaft sleeve;

FIG. 5 is a schematic structural view of the middle brake ring of the present invention;

FIG. 6 is a schematic view of the structure of the middle armrest shaft head of the present invention;

FIG. 7 is a schematic view of the middle damping screw structure of the present invention;

fig. 8 is an explosion diagram of the middle damping screw according to the present invention;

FIG. 9 is a schematic structural view of the middle stopper of the present invention;

FIG. 10 is a schematic view of the connection between the fixing block and the adjusting bolt of the present invention;

fig. 11 is a schematic structural view of a middle armrest brake lever according to the present invention;

FIG. 12 is a schematic view of the first ring member and the sleeve of the present invention;

fig. 13 is a schematic view of a first application scenario of the present invention;

fig. 14 is a schematic view of a second application scenario of the present invention;

in the drawings:

100. an arm support; 110. an arm pallet; 120. an arm rest pad;

200. an arm bracket; 210. a support outer bar; 220. supporting the inner rod; 220-1, a limit groove; 220-2 and a second limiting hole; 230. a sleeve; 240. an index pin;

300. an opening and closing assembly; 310. a handrail shaft head; 310-1, placing grooves; 320. a shaft sleeve; 320-1 through holes; 330. a first annular member; 330-1, bearing steps; 340. a clamp spring; 350. a damping screw; 350-1, mounting parts; 350-1a and mounting holes; 350-2, a disc spring; 350-2, a damping piece; 360. an oilless bushing; 370. a sealing cover; 380. a gasket;

400. a limiting component; 410. a brake ring; 410-1, a second ring-shaped member; 410-2, a first connecting lug; 410-3, a second engaging lug; 420. a limiting block; 420-1, cambered surface; 420-2, installing through holes; 420-3, locking holes; 430. a fixed block; 440. a handrail brake lever; 440-1, a first limit hole; 450. a brake handle; 460. a limit bolt; 470. adjusting the bolt; 480. a screw; 490. a nut;

500. a seat plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 1-6 show a schematic structural diagram of an embodiment of the adjustable arm support device of the present invention, the main body of which includes a symmetrical arm support 100, an arm bracket 200, an opening and closing assembly 300 and a limiting assembly 400, which are respectively located on the left and right sides of a seat.

The arm rests 100 are used to support the arms or elbows of the physician and are symmetrically disposed above the left and right sides of the seat plate 500. In order to improve the comfort of the arm support, the arm support 100 includes an arm support plate 110 and an arm support pad 120 fixed to the top end of the arm support plate 110, and the bottom of the arm support plate 110 is connected to the top end of the arm support 200. Preferably, in the present embodiment, in order to further fit the arm of the physician, increase the wrapping feeling, and prevent the arm or elbow from slipping off the arm rest pad 120, the distal end of the arm rest pad 120 is designed to be gradually higher from the middle to both sides along the longitudinal direction of the arm rest pad 120.

The arm bracket 200 is used to support the arm rest 100 at the top, and is respectively located at the left and right sides of the sitting plate 500 and connected to the bottom of the arm rest 100 at the same side.

The opening and closing assembly 300 adjusts the opening and closing of the two arm brackets 200 positioned on the two sides of the seat, and specifically comprises a handrail shaft head 310, a shaft sleeve 320, a first annular member 330 and a clamp spring 340, wherein the handrail shaft head 310 is symmetrically fixed at the left end and the right end of the bottom of the seat 500 and is close to the front of the seat 500, a placing groove 310-1 is formed in the outer wall of one end, away from the seat 500, of the handrail shaft head 310 along the circumferential direction of the handrail shaft head 310, the shaft sleeve 320 is sleeved on the outer circumferential wall of the handrail shaft head 310, the outer wall of the shaft sleeve 320 is fixedly connected with one end, away from the arm bracket 100, of the arm bracket 200, one end of the first annular member 330 is positioned in the shaft sleeve 320 and is fixedly connected with the inner wall of the shaft sleeve 320, the other end of the first annular member 330 extends upwards and is positioned above the shaft sleeve 320 and movably sleeved on the outer circumferential wall of the handrail shaft head 310, the top end of the first annular member 330 and the top end of the shaft sleeve 320 form a first annular step, and the bottom end of the shaft sleeve 320 form a second annular step. The clamp spring 340 is located in the placement groove 310-1 of the handrail shaft head 310, and the clamp spring 340 is located below the second annular step and used for clamping the shaft sleeve 320 connected with the first annular member 330. When in use, the arm brackets 200 are pushed to drive the shaft sleeves 320 connected with the arm brackets 200 to rotate around the outer walls of the armrest shaft heads 310, so that the two arm brackets 200 are opened and closed, the two arm brackets 100 positioned at the left side and the right side of the chair can be close to or far away from each other, and the operability space of a doctor is improved, wherein in the embodiment, the maximum rotation angle of the two arm brackets 200 is 185 degrees.

As shown in fig. 2, in the present embodiment, a seal cover 370 is preferably attached to the bottom of the sleeve 320 in order to prevent dust from entering the sleeve 320.

The limiting components 400 are respectively positioned on one side of the opening and closing component 300 and used for limiting the opening and closing component 300, so that the stability of a doctor during operation or examination is guaranteed. The spacing assembly 400 includes a brake ring 410, a spacing block 420, a fixing block 430, and an armrest brake lever 440. The brake ring 410 comprises an open second ring piece 410-1, a first connecting lug 410-2 arranged at a first free end of the second ring piece 410-1 and a second connecting lug 410-3 arranged at a second free end of the second ring piece 410-1, the second ring piece 410-1 is sleeved on the outer peripheral wall of the first ring piece 330 and is positioned on a first annular step, a limiting block 420 is positioned at one side of the first connecting lug 410-2 and is rotatably connected with the bottom of the seat plate 500, a fixing block 430 is positioned at one side of the second connecting lug 410-3 and is fixedly connected with the bottom of the seat plate 500, and an armrest brake lever 440 is fixed at one end of the outer side of the limiting block 420. When the arm support 200 is used, when the armrest brake lever 440 drives one end of the limiting block 420 to abut against the first connecting lug 410-2, the first connecting lug 410-2 and the second connecting lug 410-3 are close to each other, and the second ring-shaped element 410-1 is locked with the first ring-shaped element 330, so that the shaft sleeve 320 connected with the first ring-shaped element 330 is limited, and the opening and closing angle of the arm support 200 is limited finally. When the armrest brake lever 440 drives one end of the limit block 420 to be separated from the first connection lug 410-2, the first connection lug 410-2 and the second connection lug 410-3 are far away from each other, the second ring-shaped element 410-1 is separated from the first ring-shaped element 330, and the stability of the doctor during the operation or examination is also guaranteed by limiting the opening and closing assembly 300 through the limiting assembly 400.

As shown in fig. 3, in the present embodiment, preferably, a spacer 380 is further provided on the outer circumferential wall of the arm stub 310 and above the brake rim 410 in order to reduce friction between the brake rim 410 and the arm stub 310 and to avoid noise caused by movement of the brake rim 410.

As shown in fig. 5, in the present embodiment, in order to further improve the effect of the position limiting assembly 400 on the opening/closing assembly 300, the length of the first engaging lug 410-2 is preferably greater than the length of the second engaging lug 410-3.

With reference to fig. 13 and 14, the adjustable arm support device of the present embodiment is specifically used as follows:

firstly, a doctor sits on the seat plate 500, then pushes the arm brackets 200 on the two sides of the seat to move close to or separate from each other according to the specific operation or examination requirement, at the moment, the shaft sleeves 320 connected with the arm brackets 200 rotate around the armrest shaft heads 310, and after the positions of the two arm brackets 200 are determined, the armrest brake rods 440 are pushed to drive the limiting blocks 420 to lock the first ring piece 330 positioned in the brake ring 410, so that the limiting fixation of the shaft sleeves 320 connected with the first ring piece 330 is realized, the limiting fixation of the positions of the arm brackets 100 at the top ends of the two arm brackets 200 is realized, the relative position between the two arm brackets 100 can be adjusted by the doctor according to different use requirements, and the operability space of the doctor is improved.

Example 2

As shown in fig. 9 and 10, in embodiment 2, on the basis of embodiment 1, in order to linearly increase or decrease the pressing force generated by the stopper 420 during rotation, the end surface of the stopper 420 contacting the first connecting lug 410-2 is an outwardly convex arc surface 420-1. Preferably, in this embodiment, in order to further enable the limiting block 420 to move within a certain range, two limiting bolts 460 are connected to the outer wall of the first connecting lug 410-2 near the limiting block 420, and when the armrest brake lever 440 drives the limiting block 420 to rotate, the arc surface 420-1 of the limiting block 420 is turned between the two limiting bolts 460.

Preferably, in the embodiment, in order to adjust the distance from the end of the adjusting bolt 470 to the second engaging lug 410-3 by a small amount, thereby adjusting the force of the limiting assembly 400 in limiting the brake ring 410, the end surface of the fixing block 430 far from the second engaging lug 410-3 is movably connected with the adjusting bolt 470, the end of the adjusting bolt 470 transversely penetrates through the fixing block 430 and then is located at the outer side of the second engaging lug 410-3, and after the position is adjusted, the adjusting bolt is fixed by the nut 490.

Example 3

As shown in fig. 2, 9 and 11, in embodiment 3, on the basis of embodiment 1, in order to facilitate the maintenance of the later-stage limiting block 420 and the armrest brake lever 440, the limiting block 420 and the armrest brake lever 440 are detachably configured and connected by a screw 480. Specifically, an installation through hole 420-2 into which the handrail braking rod 440 is inserted is formed in one end face of the limiting block 420, a locking hole 420-3 which is communicated with the installation through hole 420-2 and is matched with the screw 480 is formed in the bottom end of the limiting block 420, and a first limiting hole 440-1 which is matched with the screw 480 is formed in the outer wall of one end, located in the installation through hole 420-2, of the handrail braking rod 440. Preferably, in this embodiment, in order to further improve the hand feeling of the doctor, the outer wall of one end of the armrest brake lever 440, which is far away from the limiting block 420, is wrapped with the brake handle 450 made of ABS material, and the armrest brake lever 440 may be bent, which further facilitates the operation.

Example 4

As shown in fig. 2, 7 and 8, in embodiment 4, in addition to embodiment 1, a damping screw 350 is movably connected to an outer wall of the boss 320 in order to adjust a resistance when the boss 320 rotates with respect to the armrest shaft head 310. The other end of the damping screw 350 penetrates through the outer walls of the shaft sleeve 320 and the first ring 330 in sequence and then abuts against the outer wall of the armrest shaft head 310. In use, the pressure of the damping screw 350 against the head 310 of the handrail shaft can be adjusted to generate a certain frictional resistance when the shaft sleeve 320 rotates, thereby preventing the arm bracket 200 coupled to the outer wall of the shaft sleeve 320 from being too flexible when rotated. Specifically, the damping screw 350 comprises a mounting portion 350-1 in threaded connection with a through hole 320-1 formed in the outer wall of the shaft sleeve 320, and a disc spring 350-2 and a damping member 350-3 movably sleeved on the mounting portion 350-1, wherein a mounting hole 350-1a is formed in the outer wall of the mounting portion 350-1, and one end, away from the disc spring 350-2, of the damping member 350-3 abuts against the outer wall of the armrest spindle head 310. When the damping screw 350 is used, one end of a wrench is inserted into the mounting hole 350-1a, and the mounting part 350-1 is rotated clockwise or anticlockwise to realize screwing or unscrewing of the whole damping screw 350. When the mounting part 350-1 is rotated clockwise, the disc spring 350-2 is compressed, the frictional force of the damping member 350-3 sleeved on the mounting part 350-1 to the outer wall of the armrest shaft head 310 is increased, and when the mounting part 350-1 is rotated counterclockwise, the frictional force of the damping member 350-3 sleeved on the mounting part 350-1 to the outer wall of the armrest shaft head 310 is reduced, so that the resistance of the arm bracket 200 during rotation can be adjusted.

As shown in fig. 2, 3 and 12, in the present embodiment, in order to maintain the friction between the bushing 320 and the handrail shaft head 310 constant, to stabilize the rotation and to reduce the wear, an oilless bushing 360 is preferably fitted over the outer circumferential wall of the handrail shaft head 310 and the snap spring 340, and the inner wall of the first ring member 330 at one end inside the bushing 320 is provided with a bearing step 330-1 along the circumferential direction of the first ring member 330. In this embodiment, the oilless bushing 360 is provided in 2, one of which is located above the bearing step 330-1 and the other is located above the snap spring 340. When the shaft sleeve 320 rotates relative to the handrail shaft head 310, the oilless bushing 360 between the shaft sleeve 320 and the handrail shaft head 310 generates a frictional force, so that the frictional force between the shaft sleeve 320 and the handrail shaft head 310 is constant, the rotation is stable, and the abrasion is reduced.

Oilless bush 360 in this embodiment is straight column type oilless bush, adopts high strength brass as the base member to radial embedding is arranged orderly cylindric polymer filler and is friction material, has realized oilless lubrication.

Example 5

As shown in fig. 1, 4 and 12, in embodiment 5, in addition to embodiment 1, in order to adjust the height of the arm rest 100 from the ground and further expand the range of use of the medical staff during surgery, the height of the arm rest 200 is adjustable. The arm bracket 200 comprises a support outer rod 210 and a support inner rod 220 which can extend up and down in the support outer rod 210, the top end of the support inner rod 220 is fixedly connected with the bottom of the arm support 100, and the bottom end of the support outer rod 210 is fixedly connected with the outer wall of the shaft sleeve 320. Specifically, a sleeve 230 is connected between the outer support rod 210 and the inner support rod 220, an indexing pin 240 is connected to the outer wall of the sleeve 230, one end of the indexing pin 240 located on the handle is located on the outer side wall of the sleeve 230, the other end of the indexing pin 240 transversely penetrates through the outer wall of the sleeve 230 and then is located in the sleeve 230, limiting grooves 220-1 are formed in the outer walls of the two inner support rods 220 in the view along the length direction of the inner support rod 220, and a plurality of limiting holes 220-2 matched with the indexing pin 240 are uniformly formed in the limiting grooves 220-1. When the telescopic arm support is used, the extending height of the inner support rod 220 in the outer support rod 210 can be adjusted according to specific requirements, so that the height of the arm support 100 from the ground is adjusted, the up-and-down movement stroke of the inner support rod 220 is 0-19CM, when the handle of the indexing pin 240 is pulled to move towards the direction far away from the sleeve 230, the inner support rod 220 can slide up and down in the outer support rod 210, when the handle of the indexing pin 240 moves towards the direction close to the sleeve 230 under the action of the spring, one end, far away from the handle of the indexing pin 240, of the indexing pin 240 abuts against one limiting hole 220-2 in the inner support rod 220, and at the moment, the height of the inner support rod 220 is limited. Preferably, in the present embodiment, the arm rest 100 is t-shaped in overall longitudinal section after being connected to the arm bracket 200, and the lower end of the support outer rod 210 is bent in a curve so that a certain horizontal distance is left between the support outer rod 210 and the seat plate 500 of the seat. It should be noted that the arm bracket 200 is not limited to the height adjustment of the arm support 100 by adjusting the extension and retraction of the inner support rod 220 in the outer support rod 210 through the index pin 240 as described in this embodiment, and any other structure such as a threaded connection between the inner support rod 220 and the outer support rod 210, or a snap connection for adjusting the extension and retraction of the inner support rod 220 in the outer support rod 210 may be used.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An adjustable arm rest device, comprising:

arm supports (100) respectively and symmetrically arranged above the left side and the right side of the seat plate (500);

the arm brackets (200) are respectively positioned at the left side and the right side of the seat plate (500) and are connected with the bottoms of the arm brackets (100) positioned at the same side;

the opening and closing components (300) are respectively positioned below the seat plate (500) and connected with one end of the arm bracket (200) positioned on the same side, which is far away from the arm bracket (100), and can drive the arm bracket (200) to open and close;

and the limiting assemblies (400) are respectively positioned on one sides of the opening and closing assemblies (300) and are used for limiting the opening and closing assemblies (300).

2. An adjustable arm rest device according to claim 1, wherein the opening and closing assembly (300) comprises:

the armrest shaft heads (310) are symmetrically fixed at the left end and the right end of the bottom of the seat plate (500) and are close to the front of the seat plate (500), and the armrest shaft heads (310) are far away from the outer wall of one end of the seat plate (500) and are provided with placing grooves (310-1) along the circumferential direction of the armrest shaft heads (310);

the shaft sleeve (320) is sleeved on the outer peripheral wall of the handrail shaft head (310), and the outer wall of the shaft sleeve (320) is fixedly connected with one end, far away from the arm support (100), of the arm bracket (200);

one end of the first annular piece (330) is positioned in the shaft sleeve (320) and fixedly connected with the inner wall of the shaft sleeve (320), the other end of the first annular piece extends upwards to be positioned above the shaft sleeve (320) and movably sleeved on the outer peripheral wall of the handrail shaft head (310), the top end of the first annular piece (330) and the top end of the shaft sleeve (320) form a first annular step, and the bottom end of the first annular piece (330) and the inner wall of the shaft sleeve (320) form a second annular step;

the clamp spring (340) is located in the placing groove (310-1) of the handrail shaft head (310), and the clamp spring (340) is located below the second annular step and used for clamping the shaft sleeve (320) connected with the first annular piece (330).

3. An adjustable arm rest apparatus as claimed in claim 2, wherein: the outer wall swing joint of axle sleeve (320) has damping screw (350), another tip of damping screw (350) runs through axle sleeve (320) and the outer wall of first loop forming element (330) in proper order after inconsistent with the outer wall of handrail spindle nose (310).

4. An adjustable arm rest apparatus as claimed in claim 3, wherein: the damping screw (350) comprises a mounting part (350-1) in threaded connection with a through hole (320-1) formed in the outer wall of the shaft sleeve (320), a disc spring (350-2) and a damping part (350-3) which are movably sleeved on the mounting part (350-1), a mounting hole (350-1 a) is formed in the outer wall of the mounting part (350-1), and one end, far away from the disc spring (350-2), of the damping part (350-3) is abutted to the outer wall of the armrest shaft head (310).

5. An adjustable arm rest apparatus as claimed in any one of claims 2 to 4, wherein: the periphery wall of handrail spindle nose (310) just is located the top cover of jump ring (340) and is equipped with oilless bush (360).

6. An adjustable arm rest apparatus as claimed in any one of claims 2 to 4, wherein: the inner wall of one end of the first annular piece (330) positioned in the shaft sleeve (320) is provided with a bearing step (330-1) along the circumferential direction of the first annular piece (330).

7. An adjustable arm support device according to any one of claims 2 to 4, wherein the limiting assembly (400) comprises:

the brake ring (410) comprises an open second ring piece (410-1), a first connecting lug (410-2) arranged at a first free end of the second ring piece (410-1) and a second connecting lug (410-3) arranged at a second free end of the second ring piece (410-1), wherein the second ring piece (410-1) is sleeved on the outer peripheral wall of the first ring piece (330) and is positioned on the first annular step;

the limiting block (420) is positioned on one side of the first connecting lug (410-2) and is rotatably connected with the bottom of the seat plate (500);

the fixing block (430) is positioned on one side of the second connecting lug (410-3) and is fixedly connected with the bottom of the seat plate (500);

the armrest brake rod (440) is fixed at one end of the outer side of the limiting block (420);

when the armrest brake lever (440) drives one end of the limiting block (420) to abut against the first connecting lug (410-2), the first connecting lug (410-2) and the second connecting lug (410-3) are close to each other, the second annular member (410-1) is locked with the first annular member (330), when the armrest brake lever (440) drives one end of the limiting block (420) to be separated from the first connecting lug (410-2), the first connecting lug (410-2) and the second connecting lug (410-3) are far away from each other, and the second annular member (410-1) is separated from the first annular member (330).

8. An adjustable arm rest apparatus as claimed in claim 7, wherein: the end face, contacted with the first connecting lug (410-2), of the limiting block (420) is an outwards protruded cambered surface (420-1), the outer wall, close to the limiting block (420), of the first connecting lug (410-2) is connected with two limiting bolts (460), and when the handrail brake rod (440) drives the limiting block (420) to rotate, the cambered surface (420-1) of the limiting block (420) overturns between the two limiting bolts (460).

9. An adjustable arm rest apparatus as claimed in claim 7, wherein: an end face, far away from the second connecting lug (410-3), of the fixing block (430) is movably connected with an adjusting bolt (470), and the tail end of the adjusting bolt (470) transversely penetrates through the fixing block (430) and then is located on the outer side of the second connecting lug (410-3).

10. An adjustable arm rest apparatus as claimed in claim 7, wherein: the handrail brake device is characterized in that the limiting block (420) and the handrail brake rod (440) are detachably connected through a screw (480), an end face of the limiting block (420) is provided with an installation through hole (420-2) for the handrail brake rod (440) to be inserted, the bottom end of the limiting block (420) is provided with a locking hole (420-3) which is communicated with the installation through hole (420-2) and matched with the screw (480), and the outer wall of one end, located in the installation through hole (420-2), of the handrail brake rod (440) is provided with a first limiting hole (440-1) matched with the screw (480).

11. An adjustable arm rest apparatus as claimed in any one of claims 2 to 3, wherein: arm bracket (200) are including supporting outer pole (210) and can be in supporting outer pole (210) support interior pole (220) of stretching out and drawing back from top to bottom, the top of supporting interior pole (220) and the bottom fixed connection of arm support (100), the bottom of supporting outer pole (210) and the outer wall fixed connection of axle sleeve (320).

12. An adjustable arm rest apparatus according to claim 11, wherein: a sleeve (230) is connected between the outer supporting rod (210) and the inner supporting rod (220), an indexing pin (240) is connected to the outer wall of the sleeve (230), one end of the indexing pin (240) located on the handle is located on the outer side wall of the sleeve (230), the other end of the indexing pin (240) transversely penetrates through the outer wall of the sleeve (230) and then is located in the sleeve (230), limiting grooves (220-1) are formed in the outer walls of the two inner supporting rods (220) in a view along the length direction of the inner supporting rod (220), and a plurality of second limiting holes (220-2) matched with the indexing pin (240) are uniformly formed in the limiting grooves (220-1);

when the handle of the index pin (240) moves in the direction away from the sleeve (230), the inner support rod (220) can slide up and down in the outer support rod (210), and when the handle of the index pin (240) moves in the direction close to the sleeve (230), the other end of the index pin (240) is abutted against one of the second limiting holes (220-2).