阅读说明：本技术 一种医用轮椅 (medical wheelchair ) 是由 管宜媛 朱焕荣 祝建国 于 2019-09-19 设计创作，主要内容包括：本发明一种医用轮椅包括纵架(100)、横架(200)、椅垫杆(300)、靠背杆(400)、辅助部(500),其以第一电机(501)拉动拉绳(504)实现两组支撑杆的折叠和展开,而控制多个靠背杆(400)形成的靠背和多个椅垫杆(300)形成的椅垫的弯折和展开状态而辅助用户站起和坐下。本发明通过上述辅助部(500)来将多个靠背杆(400)形成的靠背和多个椅垫杆(300)形成的椅垫实现弯折和展开状态,从而可让用户最需要受力的上半身得到支撑,不会出现仅仅支撑臀部而需要依靠核心力量才能支撑起上半身的现象。(The invention relates to a medical wheelchair which comprises a longitudinal frame (100), a transverse frame (200), a seat cushion rod (300), a backrest rod (400) and an auxiliary part (500), wherein a first motor (501) pulls a pull rope (504) to fold and unfold two groups of supporting rods, so that the bending and unfolding states of a backrest formed by a plurality of backrest rods (400) and a seat cushion formed by a plurality of seat cushion rods (300) are controlled to assist a user to stand and sit down. The invention realizes the folding and unfolding state of the backrest formed by a plurality of backrest rods (400) and the chair cushion formed by a plurality of chair cushion rods (300) through the auxiliary part (500), thereby supporting the upper half body which is most required to bear force by a user, and avoiding the phenomenon that the upper half body can be supported only by supporting the hip and relying on the core force.)

1. A medical wheelchair is characterized in that: comprises that

A vertical frame (100) to which a rear wheel (101) is mounted via a bearing;

a cross frame (200) having an end fixed to the middle of the vertical frame (100) and a front wheel (201) mounted thereon via a bearing;

The chair cushion rod (300) is characterized in that one end of the chair cushion rod is mounted on the outer circumferential surface of the first shaft (111) through a bearing, the other end of the chair cushion rod is mounted on the outer circumferential surface of the second shaft (112) through a bearing, and one side, close to the first shaft (111), of the chair cushion rod (300) and one side, close to the second shaft (112), of the chair cushion rod are both overlapped with the cross frame (200);

The lower end of the back rest rod (400) is arranged on the outer circumferential surface of the second shaft (112) through a bearing, the upper end of the back rest rod is arranged on the outer circumferential surface of a third shaft (113) through a bearing, and one side, close to the third shaft (113), of the back rest rod (400) is overlapped with the longitudinal frame (100);

And an auxiliary part (500) which controls the folding and unfolding states of the backrest formed by the plurality of backrest rods (400) and the seat cushion formed by the plurality of seat cushion rods (300) by pulling the pull rope (504) by a first motor (501) to realize the folding and unfolding of the two groups of support rods so as to assist the user to stand up and sit down.

2. The medical wheelchair as claimed in claim 1, wherein: the auxiliary part (500) comprises a first motor (501), an output shaft (502), a rope pulley (503), a pulling rope (504), a first rope ring (505), a first swing rod (506), a first pin shaft (507), a second pin shaft (508), a second swing rod (509), a first spring (510), a second rope ring (511), a third swing rod (512), a third pin shaft (513), a fourth pin shaft (514), a fourth swing rod (515) and a second spring (516), wherein the first motor (501) is fixed with the bottom of the longitudinal frame (100), the output shaft (502) of the first motor (501) is coaxially fixed with the rope pulley (503), the rope pulley (503) is fixed with one end of the pulling rope (504), and the other end of the pulling rope (504) penetrates through the inside of the first rope ring (505) and is fixed with the second rope ring (511);

The first rope ring (505) is fixed with one end of a first swing rod (506), the other end of the first swing rod (506) is hinged with the longitudinal frame (100) through a first pin shaft (507), one end of the first swing rod (506) is hinged with one end of a second swing rod (509) through a second pin shaft (508), the other end of the second swing rod (509) is hinged with the second shaft (112), and a first spring (510) is arranged between the first swing rod (506) and the second swing rod (509);

The second rope ring (511) is fixed to one end of a third swing rod (512), the other end of the third swing rod (512) is hinged to the longitudinal frame (100) through a third pin shaft (513), one end of the third swing rod (512) is hinged to one end of a fourth swing rod (515) through a fourth pin shaft (514), the other end of the fourth swing rod (515) is hinged to the third shaft (113), and a second spring (516) is arranged between the third swing rod (512) and the fourth swing rod (515).

3. The medical wheelchair as claimed in claim 2, wherein: the plurality of seat cushion bars (300) are hinged to the cross frame (200) by a first shaft (111).

4. The medical wheelchair as claimed in claim 2, wherein: the plurality of chair cushion rods (300) are hinged to one end of a fifth swing rod (520) through a first shaft (111), and the other end of the fifth swing rod (520) is hinged to the cross frame (200) through a fifth pin shaft (521).

5. The medical wheelchair as claimed in claim 4, wherein: a first limiting block (301) is fixed on the transverse frame (200), the first limiting block (301) is used for limiting the maximum angle of the fifth swing rod (520), and the left side surface of the first limiting block (301) can be in lap joint with the right side surface of the fifth swing rod (520).

6. The medical wheelchair as claimed in claim 5, wherein: one end of the first swing rod (506) is fixed with one end of the first limiting plate (531), and the other end of the first limiting plate (531) can be in lap joint with one end of the second swing rod (509) in the unfolding state.

7. the medical wheelchair as claimed in claim 6, wherein: one end of the third swing rod (512) is fixed with one end of the second limiting plate (532), and the other end of the second limiting plate (532) can be in lap joint with one end of the fourth swing rod (515) in the unfolding state.

8. the medical wheelchair as claimed in claim 7, wherein: the first spring (510) has a force per unit length of compression that is less than the force per unit length of compression of the second spring (516).

9. the medical wheelchair as claimed in claim 8, wherein: the cross frame (200) is provided with a brake unit (600), and the brake unit (600) is used for braking the rear wheel (101).

Technical Field

The invention relates to medical equipment, in particular to a medical wheelchair.

Background

The traditional wheelchair can only take charge of the action of the patient under the condition of nursing. When a patient gets on or off the wheelchair, a caregiver is usually required to help the wheelchair, which is very inconvenient.

The invention patents in China: 201510552163.5, title of the invention: the assisted wheelchair pushes up a chair cushion of the wheelchair under the action of the hydraulic rod, so that a user is jacked up, and the assistance of leaving the wheelchair is realized. However, from sitting to standing, if only against the user's hips without back support, the core strength requirements for the user are too high, resulting in still not being good at assisting the user to stand up and, also, not being good at assisting the user to sit down.

therefore, there is a need for a medical wheelchair that better assists a user in standing up and sitting down.

Disclosure of Invention

The invention aims to provide a medical wheelchair capable of better assisting a user in standing up and sitting down.

The invention relates to a medical wheelchair, which comprises

A vertical frame on which a rear wheel is mounted through a bearing;

The end part of the transverse frame is fixed with the middle part of the longitudinal frame, and a front wheel is arranged on the transverse frame through a bearing;

One end of the chair cushion rod is arranged on the outer circumferential surface of the first shaft through a bearing, the other end of the chair cushion rod is arranged on the outer circumferential surface of the second shaft through a bearing, and one side of the chair cushion rod close to the first shaft and one side of the second shaft are both lapped with the cross frame;

the lower end of the backrest rod is mounted on the outer circumferential surface of the second shaft through a bearing, the upper end of the backrest rod is mounted on the outer circumferential surface of a third shaft through a bearing, and one side, close to the third shaft, of the backrest rod is in lap joint with the longitudinal frame;

And the auxiliary part is used for controlling the bending and unfolding states of a backrest formed by a plurality of backrest rods and a chair cushion formed by a plurality of chair cushion rods by pulling the pull rope by a first motor to realize the folding and unfolding of the two groups of supporting rods so as to assist a user to stand up and sit down.

The invention relates to a medical wheelchair, wherein an auxiliary part comprises a first motor, an output shaft, a rope pulley, a pull rope, a first rope ring, a first swing rod, a first pin shaft, a second swing rod, a first spring, a second rope ring, a third swing rod, a third pin shaft, a fourth swing rod and a second spring, wherein the first motor is fixed with the bottom of a longitudinal frame;

the first rope ring is fixed with one end of a first swing rod, the other end of the first swing rod is hinged with the longitudinal frame through a first pin shaft, one end of the first swing rod is hinged with one end of a second swing rod through a second pin shaft, the other end of the second swing rod is hinged with a second shaft, and a first spring is arranged between the first swing rod and the second swing rod;

The second rope ring is fixed with one end of a third oscillating bar, the other end of the third oscillating bar is connected with the longitudinal frame through a third pin shaft, one end of the third oscillating bar is connected with one end of a fourth oscillating bar through a fourth pin shaft, the other end of the fourth oscillating bar is connected with the third shaft through a hinge, and a second spring is arranged between the third oscillating bar and the fourth oscillating bar.

The invention relates to a medical wheelchair, wherein a plurality of chair cushion rods are hinged with a cross frame through a first shaft.

The invention relates to a medical wheelchair, wherein a plurality of chair cushion rods are hinged with one end of a fifth swing rod through a first shaft, and the other end of the fifth swing rod is hinged with a transverse frame through a fifth pin shaft.

The medical wheelchair comprises a cross frame, a first limit block and a second limit block, wherein the cross frame is fixedly provided with the first limit block, the first limit block is used for limiting the maximum angle of a fifth swing rod, and the left side surface of the first limit block can be lapped with the right side surface of the fifth swing rod.

According to the medical wheelchair, one end of the first swing rod is fixed with one end of the first limiting plate, and the other end of the first limiting plate can be in lap joint with one end of the second swing rod in the unfolded state.

According to the medical wheelchair, one end of the third swing rod is fixed with one end of the second limiting plate, and the other end of the second limiting plate can be in lap joint with one end of the fourth swing rod in the unfolded state.

The invention provides a medical wheelchair, wherein the force of the first spring for compressing the unit length is smaller than the force of the second spring for compressing the unit length.

The present invention provides a medical wheelchair, wherein the cross frame is provided with a brake section for braking a rear wheel.

the medical wheelchair is different from the prior art in that the backrest formed by the plurality of backrest rods and the chair cushion formed by the plurality of chair cushion rods are bent and unfolded through the auxiliary part, so that the upper half body which is most stressed by a user can be supported, and the phenomenon that the upper half body can be supported only by supporting the hip and depending on core force is avoided.

the invention will be further explained with reference to the accompanying drawings.

Drawings

Figure 1 is a side view of a medical wheelchair in a first condition;

Figure 2 is a side view of a medical wheelchair in a second condition;

Fig. 3 is a front view of fig. 1.

Detailed Description

As shown in figures 1-3, referring to figures 1 and 2, the medical wheelchair of the invention comprises

A vertical frame 100 to which a rear wheel 101 is mounted via a bearing;

A cross frame 200, the end of which is fixed to the middle of the longitudinal frame 100 and to which a front wheel 201 is mounted through a bearing;

a cushion rod 300 having one end mounted on the outer circumferential surface of the first shaft 111 through a bearing and the other end mounted on the outer circumferential surface of the second shaft 112 through a bearing, wherein the side of the cushion rod 300 close to the first shaft 111 and the side of the second shaft 112 are overlapped with the cross frame 200;

A back rest rod 400, the lower end of which is mounted on the outer circumferential surface of the second shaft 112 through a bearing, and the upper end of which is mounted on the outer circumferential surface of a third shaft 113 through a bearing, wherein one side of the back rest rod 400 close to the third shaft 113 is overlapped with the longitudinal frame 100;

An auxiliary part 500 for assisting a user to stand up and sit down by controlling the bent and unfolded states of the backrest formed of the plurality of backrest levers 400 and the cushion formed of the plurality of cushion levers 300 by pulling the pulling rope 504 with the first motor 501 to fold and unfold the two sets of support levers.

The present invention can support the upper body, which is most stressed by a user, by bending and unfolding the backrest formed by the plurality of backrest rods 400 and the seat cushion formed by the plurality of seat cushion rods 300 through the auxiliary part 500, and thus, the phenomenon that the upper body can be supported only by the hip and the core force is not required to be generated.

The back rest rod 400 and the cushion rod 300 are supported together by the second shaft 112 and are configured in a staggered manner, so that when the back rest rod 400 is jacked up by the two groups of support rods, the cushion rod 300 can be driven to lift up together, the back rest rod 400 supported by the four-bar structure is realized, the cushion rod 300 supported by the other triangular support structure or the slave four-bar structure is driven, and the effect that the cushion rod 300 and the back rest rod 400 are both supported is realized.

Wherein the plurality of cushion bars 300 and the plurality of back bars 400 are alternately disposed on the second shaft 112, so that the cushion formed by the plurality of cushion bars 300 and the back formed by the plurality of back bars 400 can be folded and unfolded with each other without being affected by each other.

Wherein the rear wheel shaft 105 of the rear wheel 101 is mounted on the vertical frame 100 through a bearing.

The auxiliary units 500 may be disposed on one side of the wheelchair, or may be symmetrically disposed on both sides.

wherein a cross beam is provided between the longitudinal frames 100, and the cross beam is used for overlapping the top of the backrest formed by the plurality of backrest rods 400.

Further, referring to fig. 1 and 3, the auxiliary part 500 includes a first motor 501, an output shaft 502, a rope sheave 503, a pulling rope 504, a first rope loop 505, a first swing link 506, a first pin 507, a second pin 508, a second swing link 509, a first spring 510, a second rope loop 511, a third swing link 512, a third pin 513, a fourth pin 514, a fourth swing link 515, and a second spring 516, the first motor 501 is fixed to the bottom of the longitudinal frame 100, the output shaft 502 of the first motor 501 is coaxially fixed to the rope sheave 503, the rope sheave 503 is fixed to one end of the pulling rope 504, and the other end of the pulling rope 504 passes through the inside of the first rope loop 505 and is fixed to the second rope loop 511;

The first rope loop 505 is fixed to one end of a first swing link 506, the other end of the first swing link 506 is hinged to the longitudinal frame 100 through a first pin 507, one end of the first swing link 506 is hinged to one end of a second swing link 509 through a second pin 508, the other end of the second swing link 509 is hinged to the second shaft 112, and a first spring 510 is arranged between the first swing link 506 and the second swing link 509;

The second rope ring 511 is fixed to one end of a third swing rod 512, the other end of the third swing rod 512 is hinged to the longitudinal frame 100 through a third pin 513, one end of the third swing rod 512 is hinged to one end of a fourth swing rod 515 through a fourth pin 514, the other end of the fourth swing rod 515 is hinged to the third shaft 113, and a second spring 516 is arranged between the third swing rod 512 and the fourth swing rod 515.

The present invention can assist the user to stand up or sit down from the wheelchair by the aid of the auxiliary part 500, and compared with the prior art, the present invention can assist the user to get on or off the wheelchair by controlling the plurality of backrest rods 400 to drive the seat cushion formed by the plurality of seat cushion rods 300 to be lifted up and down by the idea that the upper half of the body drives the lower half of the body, so that the user is free from the problem that the upper half of the body needs to be supported by core force, and the present invention provides better comfort for the user.

In use, when the first motor 501 is not operated, the first swing link 506 and the second swing link 509 are kept folded by the first spring 510; the third swing link 512 and the fourth swing link 515 are kept in a folded state by a second spring 516; in addition, the folded state of the person can be better maintained since the person leans on the cushion formed of the plurality of cushion bars 300 and the backrest formed of the plurality of backrest bars 400.

When a user needs to stand up from the wheelchair, the braking system is controlled to brake the rear wheel 101, then the first motor 501 works, the output shaft 502 of the first motor 501 controls the pulling rope 504 to be recovered to the rope pulley 503 through the rope pulley 503, so that the distance between the first rope loop 505 and the second rope loop 511 is shortened, the first swing rod 506 and the second swing rod 509 are changed into an unfolding state, the third swing rod 512 and the fourth swing rod 515 are changed into an unfolding state, a backrest formed by a plurality of backrest rods 400 is jacked up, a seat cushion formed by a plurality of seat cushion rods 300 can be simultaneously driven to be lifted upwards, the user is assisted to stand up, and the whole process is driven by the pulling rope step by step, so that the user is softer.

When a user needs to sit down from the wheelchair, the wheelchair is braked and the first motor is rotated reversely, so that the first swing link 506 and the second swing link 509 are changed into the folded state, and the third swing link 512 and the fourth swing link 515 are changed into the folded state, so that the user is gently changed from standing to sitting down.

In the background art, a hydraulic rod directly jacks up a complete chair cushion, and a user stands up through inertia, so that the impact on the body of the user is large, the upper body of the user is not supported, the user needs to stand up through core force, and the comfort level and the stability of the user are poor. According to the invention, through repeatedly and repeatedly observing the actions of the lower wheelchair of the user, the user is found that when the user generally stands up, the lower body is driven by the upper body in a moving way, but the lower body is not driven and then the upper body is supported to stand up.

One end of the first spring 510 is fixed to the first swing link 506, and the other end is fixed to the second swing link 509, and the first spring 510 tends to keep the first swing link 506 and the second swing link always folded.

one end of the second spring 516 is fixed to the third swing link 512, and the other end is fixed to the fourth swing link 515, and the second spring 516 tends to keep the third swing link 512 and the fourth swing link in a folded state all the time.

Preferably, the first spring 510 and the second spring 516 may be arc springs.

Preferably, the third pin 513 may be located on the upper side or the lower side of the first pin 507, and if the third pin 513 is located on the lower side of the first pin 507, the third swing link 512 and the fourth swing link 515 may be prevented from occupying the rear space of the user as little as possible in the folded state, thereby reducing the occupied area of the entire wheelchair.

In the hinge connection between the other end of the first swing link 506 and the vertical frame 100 through the first pin 507, the hinge connection may be: one end of the first swing rod 506 is fixed with an outer ring of a bearing, an inner ring of the bearing is fixed with the first pin 507, and the first pin 507 is fixed with the longitudinal frame 100. The hinge connection modes of the second pin shaft 508, the third pin shaft 513 and the fourth pin shaft 514 are the same, and are not described in detail below.

The bottom of the longitudinal frame 100 may be fixed to a bottom beam, the upper surface of the bottom beam may be fixed to the lower surface of the first motor 501, and the side surface of the longitudinal frame 100 may also be fixed to the side surface of the first motor 501, so as to enhance the fixing stability of the first motor 501.

Further, the plurality of seat cushion bars 300 are hinge-connected to the cross frame 200 by a first shaft 111.

The first shaft 111 is directly hinged with the cross frame 200, so that the backrest rod 400 supported by a four-bar linkage structure drives the cushion rod 300 supported by a triangular structure, thereby improving the stability of the chair.

Of course, a variant of the invention could also be: the plurality of cushion levers 300 are hinged to one end of a fifth swing link 520 through a first shaft 111, and the other end of the fifth swing link 520 is hinged to the cross frame 200 through a fifth pin 521.

According to the invention, the backrest rod 400 supported by the large four-bar structure drives the cushion rod 300 supported by the small four-bar structure through the fifth swing link 520 and the fifth pin shaft, so that the ascending displacement amplitude of the cushion rod 300 is increased, and the support for the buttocks of a user is increased.

In order to ensure the support of the small four-bar linkage structure, the fifth swing link 520 is always inclined from the top left to the bottom right as shown in the figure when and before the cushion lever 300 moves to the highest position, so as to prevent the cushion lever 300 of the small four-bar linkage structure from being too short in length to support.

further, a first limit block 301 is fixed on the cross frame 200, the first limit block 301 is used for limiting the maximum angle of the fifth swing link 520, and the left side surface of the first limit block 301 can be overlapped with the right side surface of the fifth swing link 520.

according to the invention, the first limit block 301 can limit the fifth swing link 520, so that the situation that the fifth swing link 520 swings to the vertical state and cannot be reset is avoided. That is, in use, the swing position of the fifth swing link 520 is always inclined from the upper left to the lower right as shown in the figure.

Further, one end of the first swing link 506 is fixed to one end of the first limit plate 531, and the other end of the first limit plate 531 can be overlapped with one end of the second swing link 509 in the unfolded state.

According to the invention, the first limit plate 531 can prevent the first swing link 506 and the second swing link 509 from being reset or reset error due to overlarge unfolding angles in the unfolding state.

Wherein, when the first pendulum rod 506 and the second pendulum rod 509 are in the unfolding state, the first pendulum rod 506 and the second pendulum rod 509 are not parallel to each other, that is, when the first pendulum rod 506 and the second pendulum rod 509 are in the folding state and the unfolding state, the included angle thereof is 0-180 degrees, thereby avoiding the problem that the first pendulum rod 506 and the second pendulum rod 509 are parallel to each other and the direction of resetting cannot be reset or is wrong.

further, one end of the third swing link 512 is fixed to one end of the second limiting plate 532, and the other end of the second limiting plate 532 can be overlapped with one end of the fourth swing link 515 in the unfolded state.

According to the invention, the second limiting plate 532 can prevent the third swing link 512 and the fourth swing link 515 from being too large in unfolding angle in the unfolding state and being incapable of being reset or wrong in resetting.

When the third oscillating bar 512 and the fourth oscillating bar 515 which are limited by the second limiting plate 532 are in the unfolded state, the third oscillating bar 512 and the fourth oscillating bar 515 are not parallel to each other, that is, no matter in the folded state and the unfolded state, the included angle of the third oscillating bar 512 and the fourth oscillating bar 515 is 0-180 degrees, so that the problem that the third oscillating bar 512 and the fourth oscillating bar 515 are parallel to each other and cannot be reset or the resetting direction is wrong is avoided.

further, the force per unit length of compression of the first spring 510 is less than the force per unit length of compression of the second spring 516.

the third swing link 512 and the fourth swing link 515 are assisted by the more difficult-to-deform spring, i.e., the second spring 516, so that the third shaft 113 can be jacked up later, and the second shafts 112 supported by the first swing link 506 and the second swing link 509 can be jacked up first, so that the backrest formed by the plurality of backrest rods 400 can jack up the lower part of the upper half of the user first and then jack up the lower part of the upper half of the user, thereby avoiding the exertion of the user core as much as possible and increasing the comfort of the user.

further, the cross frame 200 is provided with a brake 600, and the brake 600 is used for braking the rear wheel 101.

The brake 600 may be a conventional one, and serves to assist the user in getting up or sitting down, and brake the rear wheel to prevent the wheelchair from moving.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.