CN209951608U

CN209951608U - Wheelchair backrest angle adjusting mechanism

Info

Publication number: CN209951608U
Application number: CN201920140336.6U
Authority: CN
Inventors: 邓玉兵; 邓玉团; 朱华
Original assignee: Foshan Rongjun Medical And Beauty Equipment Co Ltd
Current assignee: Foshan Rongjun Medical And Beauty Equipment Co Ltd
Priority date: 2019-01-25
Filing date: 2019-01-25
Publication date: 2020-01-17
Anticipated expiration: 2029-01-25

Abstract

The utility model provides a wheelchair backrest angle adjustment mechanism, includes the cushion pole that the level set up, but the upside of cushion pole articulates there is luffing motion's back pole, is equipped with first pin joint on the cushion pole, is equipped with the second pin joint on the back pole, articulates between first pin joint, the second pin joint to have the telescoping device. The backrest rod is hinged with the cushion rod in a vertically swinging mode, the cushion is placed on the cushion rod, the backrest is placed on the backrest rod, and the telescopic device enables the backrest rod to vertically swing through adjusting the distance between the first hinge point and the second hinge point, so that the effect of adjusting the angle of the wheelchair backrest is achieved. The utility model is used for the wheelchair.

Description

Wheelchair backrest angle adjusting mechanism

Technical Field

The utility model relates to a wheelchair, especially a wheelchair back angle adjusting mechanism.

Background

The angle of the backrest and the cushion of the common wheelchair is a fixed angle, a user sits on the wheelchair for a long time to keep a fixed posture, fatigue or other discomfort is easy to cause, and the wheelchair user hopes that the angle of the backrest of the wheelchair can be adjusted, so that the posture can be changed.

Further, the current wheelchair backrest adjusting device can be adjusted only by the user leaving the backrest, and for people with weak waist and abdomen, the user is difficult to leave the backrest and adjust when lying on the backrest, so that a wheelchair backrest which can be easily adjusted in angle without the help of other people when lying on the backrest is desired.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: a mechanism is provided that can adjust the angle of a seat back.

The utility model provides a solution of its technical problem is:

the utility model provides a wheelchair backrest angle adjustment mechanism, includes the cushion pole that the level set up, but the upside of cushion pole articulates there is luffing motion's back pole, is equipped with first pin joint on the cushion pole, is equipped with the second pin joint on the back pole, articulates between first pin joint, the second pin joint to have the telescoping device.

As a further improvement of the scheme, the upper side of the cushion rod is hinged with a handrail vertical rod, a handrail transverse rod is arranged between the back support rod and the handrail vertical rod, one end of the handrail transverse rod is hinged with the back support rod, the other end of the handrail transverse rod is hinged with the handrail vertical rod, and the cushion rod, the back support rod, the handrail transverse rod and the handrail vertical rod form a quadrangle.

As a further improvement of the above scheme, the telescopic device includes a vertical handrail rod and a horizontal handrail rod, a hinge point between the vertical handrail rod and the cushion rod is the first hinge point, a hinge point between the horizontal handrail rod and the back rod is the second hinge point, a rotation driving device is arranged at a hinge position between the vertical handrail rod and the horizontal handrail rod, a rotation end of the rotation driving device is fixedly connected with the vertical handrail rod, a hinge hole between the horizontal handrail rod and the vertical handrail rod is called a third hinge hole, the rotation end and the third hinge hole are coaxially arranged, a fixed end of the rotation driving device is connected with the horizontal handrail rod, and the rotation driving device adjusts a distance between the first hinge point and the second hinge point by adjusting an angle between the vertical handrail rod and the horizontal handrail rod.

As a further improvement of the above scheme, the rotating end of the rotating driving device is a worm wheel, the fixed end of the rotating driving device is a vertically arranged worm, the worm is rotatably connected with the handrail cross bar, and the worm is meshed with the worm wheel.

As a further improvement of the scheme, the upper end of the worm is circumferentially and fixedly connected with a hand-operated lever.

As a further improvement of the scheme, the handrail cross rod is provided with a hand-operated rod accommodating groove, and the shape of the hand-operated rod accommodating groove is matched with that of the hand-operated rod.

The utility model has the advantages that: the backrest rod is hinged with the cushion rod in a vertically swinging mode, the cushion is placed on the cushion rod, the backrest is placed on the backrest rod, and the telescopic device enables the backrest rod to vertically swing through adjusting the distance between the first hinge point and the second hinge point, so that the effect of adjusting the angle of the wheelchair backrest is achieved. The utility model is used for the wheelchair.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

FIG. 1 is a diagrammatic side view of an embodiment of the present invention;

fig. 2 is an enlarged schematic view of a rotary drive device according to an embodiment of the present invention;

fig. 3 is a diagrammatic side view of a backrest tilt condition of an embodiment of the present invention.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. The utility model provides an each technical feature can the interactive combination under the prerequisite of conflict each other.

With reference to fig. 1 to 3, this is an embodiment of the invention, in particular:

the utility model provides a wheelchair backrest angle adjustment mechanism, includes the cushion pole 010 that the level set up, but the upside of cushion pole 010 articulates there is the back pole 011 of luffing motion, is equipped with first pin joint on the cushion pole 010, is equipped with the second pin joint on the back pole 011, articulates between first pin joint, the second pin joint to have a telescoping device. The cushion is put on cushion pole 010, the back is put on cushion pole 011, the pin joint of cushion pole 011 and cushion pole 010 is the third hinge point, telescoping device adjusts first pin joint, the distance between the second pin joint, according to the triangle-shaped principle, first pin joint, the distance between the second pin joint changes, but the distance of third hinge point to first pin joint, the distance of third hinge point to second pin joint is unchangeable, can change the angle between back pole and the cushion pole 010, make back pole 011 luffing motion, reach the effect of adjusting the backrest angle.

In this embodiment, a vertical handrail rod 012 is further hinged to the upper side of the cushion rod 010, a handrail cross rod 013 is arranged between the back rest rod 011 and the vertical handrail rod 012, one end of the handrail cross rod 013 is hinged to the back rest rod 011, the other end of the handrail cross rod 013 is hinged to the vertical handrail rod 012, and the cushion rod 010, the back rest rod 011, the handrail cross rod 013 and the vertical handrail rod 012 form a quadrangle. In the process of adjusting the angle of the backrest rod 011, the angle between the armrest crossbar 013 and the backrest rod 011 can be changed simultaneously, when the included angle between the cushion rod 010 and the backrest rod 011 is increased or decreased, the included angle between the armrest crossbar 013 and the backrest rod 011 can also be increased or decreased, so that the included angle between the armrest crossbar 013 and the cushion rod 010 is changed less, the position of a hand when the hand is placed on the armrest crossbar 013 is changed less, and the hand is comfortable when the backrest angle is adjusted.

The telescoping device includes handrail montant 012, handrail cross bar 013 in this embodiment, the pin joint of handrail montant 012 and cushion pole 010 does first pin joint, the pin joint of handrail cross bar 013 and back pole 011 does the second pin joint, handrail montant 012 is equipped with rotary driving device with handrail cross bar 013's articulated position, rotary driving device's rotatory end and handrail montant 012 fixed connection, the hinge hole between handrail cross bar 013 and the handrail montant 012 is called the third hinge hole, rotatory end and the coaxial setting of third hinge hole, rotary driving device's stiff end and handrail cross bar 013 are connected. Because rotatory end and handrail montant 012 fixed connection, the stiff end is connected with handrail cross bar 013, so when rotatory end rotated around the third hinge hole, handrail cross bar 013 and handrail montant 012 can rotate around the third hinge hole relatively to make the angle between handrail cross bar 013 and the handrail montant 012 produce the change, the angle between rotary driving device through adjusting handrail montant 012, handrail cross bar 013 adjusts first pin joint, the distance between the second pin joint.

The rotation end of the rotation driving device in this embodiment is a worm wheel 014, the fixed end of the rotation driving device is a vertically arranged worm 015, the worm 015 is rotatably connected with a handrail cross bar 013, and the worm 015 is engaged with the worm wheel 014. The worm 015 is rotated to rotate the worm wheel 014, and the rotation driving device is arranged at a position where a human hand can reach, so that the adjustment of a user is facilitated; because the adjusting mechanism of the worm gear and the worm is arranged, the worm gear 014 cannot rotate under the condition that the worm 015 does not rotate by utilizing the self-locking characteristic of the worm gear and the worm, when a user leans against the backrest, the backrest bears downward force, but the backrest cannot incline downwards due to the self-locking characteristic of the worm gear and the worm, for the user with weak waist and abdomen force, the user does not need to leave the backrest in advance to adjust because of worrying about sudden downward swinging in the adjusting process, the upward or downward adjustment can be completed by the user after lying on the backrest, the help of other people is not needed, and the use freedom degree of the user is improved.

The upper end circumference fixedly connected with hand rocker 016 of worm 015 in this embodiment, the user passes through the convenient regulation of hand rocker 016, and circumference fixed connection can upwards removable, can pull down when not needing the regulation.

In this embodiment, a hand lever receiving groove 017 is formed on the armrest crossbar 013, and the shape of the hand lever receiving groove 017 matches with the shape of the hand lever 016. The hand rocker accommodating groove 017 is provided with an elastic clamping position or a buckle for fixing the hand rocker 016, when the backrest angle needs to be adjusted, the hand rocker 016 is taken out and is fixedly installed and connected with the upper end circumference of the worm 015 in a circumferential direction, and then manual adjustment can be carried out.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.

Claims

1. The utility model provides a wheelchair backrest angle adjustment mechanism which characterized in that: including cushion pole (010) that the level set up, the upside of cushion pole (010) articulates there is back pole (011) that can luffing motion, is equipped with first pin joint on cushion pole (010), is equipped with the second pin joint on back pole (011), articulates between first pin joint, the second pin joint has telescoping device.

2. The wheelchair backrest angle adjustment mechanism of claim 1, wherein: the upper side of cushion rod (010) still articulates there is handrail montant (012), is equipped with handrail horizontal pole (013) between back pole (011), handrail montant (012), and the one end and back pole (011) of handrail horizontal pole (013) are articulated, and the other end and handrail montant (012) of handrail horizontal pole (013) are articulated, and cushion rod (010), back pole (011), handrail horizontal pole (013), handrail montant (012) constitute the quadrangle.

3. The wheelchair backrest angle adjustment mechanism of claim 2, wherein: the telescopic device includes handrail montant (012), handrail horizontal pole (013), the pin joint of handrail montant (012) and cushion pole (010) does first pin joint, the pin joint of handrail horizontal pole (013) and back pole (011) does the second pin joint, handrail montant (012) is equipped with rotary drive device with the articulated position of handrail horizontal pole (013), rotary drive device's rotatory end and handrail montant (012) fixed connection, the hinge hole between handrail horizontal pole (013) and handrail montant (012) is called the third hinge hole, rotary end with the coaxial setting of third hinge hole, rotary drive device's stiff end is connected with handrail horizontal pole (013), rotary drive device adjusts the distance between first pin joint, the second pin joint through the angle of adjusting between handrail montant (012), handrail horizontal pole (013).

4. The wheelchair backrest angle adjustment mechanism of claim 3, wherein: rotatory drive arrangement's rotatory end is worm wheel (014), rotatory drive arrangement's stiff end is worm (015) of vertical setting, and worm (015) rotationally is connected with handrail horizontal pole (013), and worm (015) and worm wheel (014) meshing are connected.

5. The wheelchair backrest angle adjustment mechanism of claim 4, wherein: the upper end circumference fixedly connected with hand rocking bar (016) of worm (015).

6. The wheelchair backrest angle adjustment mechanism of claim 5, wherein: the handrail cross bar (013) is provided with a hand rocker receiving groove (017), and the shape of the hand rocker receiving groove (017) is matched with the shape of the hand rocker (016).