CN111419568A - Upper limb supporting device - Google Patents

Abstract

The invention belongs to the field of medical equipment and provides an upper limb support device, comprising a drive unit, a transmission unit, a support unit and a control unit, the transmission unit includes a ball screw and a nut, and the support unit includes a sleeve, an upper arm support and a forearm support The nut is sleeved on the ball screw, the sleeve is sleeved on the nut, the upper arm support is movably connected with the sleeve, and the forearm support is connected with the upper arm support. Through the cooperation of the ball screw and the nut, the transmission direction of the torque is changed, and the torque of the driving unit is converted into a linear motion, so that the upper arm support member moves linearly along the length direction of the ball screw. At the same time, the upper arm support can rotate around the axis of the ball screw to form a rotating pair. The present invention provides assistance through the drive unit, so that the user can conveniently raise or lower the height of the affected arm, realize the up and down movement and swing of the upper limb, expand the range of motion of the arm, and can conveniently complete some simple daily operations.

Description

An upper limb support device

technical field

The invention belongs to the field of medical devices, in particular to an upper limb support device.

Background technique

my country has entered the stage of population aging, and it is imperative to pay attention to the health of the elderly and to recover various functional impairments caused by disability or disease. Among them, patients with neuromuscular diseases often have difficulty lifting their arms against gravity, which poses a great challenge to their daily life, such as stroke, spinal cord injury, muscular dystrophy, etc. Stroke, commonly known as stroke, is an acute cerebrovascular disease with high morbidity, high mortality and high disability rate. Stroke damages the motor center of the cerebral hemisphere cortex, leading to hemiplegia. Hemiplegia is the most common sequelae of stroke, which seriously threatens the health of middle-aged and elderly people. Pediatric cerebral palsy is a syndrome characterized by postural and motor dysfunction caused by non-progressive brain injury within one month after the child's brain is immature. Spastic hemiplegia is more common. For the above-mentioned patients, due to the rapid decline of their shoulder and upper arm muscles, this directly leads to insufficient upper limb muscle strength of the patients, unable to control the entire upper limb to support them to complete various movements, but their forearm, wrist and fingers It retains sufficient sensitivity and residual strength. In this case, if the patient's elbow can get enough support to support their arm, the patient's arm can still perform normal activities. Therefore, they need a device that can support the patient's arm and lift it up and down, so that some simple daily operations can be better completed, which greatly enhances the patients' ability of daily life, thereby reducing the burden on the family and improving their quality of life. Many scientific research institutions have focused on the field of upper limb rehabilitation. For patients with upper extremity motor dysfunction due to upper extremity muscle weakness, both in the early stages of rehabilitation and when they return home after treatment, they need a wheelchair. Therefore, designing a wheelchair as a platform to provide a reliable upper limb support device has certain research significance, whether it is for the purpose of facilitating patients' daily self-care, or to reduce the burden on the patient's family and save social medical and nursing resources. . However, according to the existing research data, the research on the upper limb support device placed on the wheelchair platform for users to use in daily life is still a minority. Therefore, for stroke, multiple congenital arthritis, muscular dystrophy For people with upper limb motor dysfunction and muscle weakness caused by , spinal cord injury, cerebral palsy, etc., it is necessary to design an upper limb support device based on a wheelchair platform.

SUMMARY OF THE INVENTION

The present invention is made to solve the above problems, and the purpose is to provide an upper limb support device to solve the troubles of people who cannot carry out normal daily life due to upper limb motor dysfunction caused by upper limb muscle weakness.

The present invention provides an upper limb support device, which is characterized by comprising: a drive unit, a transmission unit, a support unit and a control unit, wherein the drive unit provides power for the transmission unit, the transmission unit transmits the power to the support unit, and the transmission unit Including: a ball screw and a nut, the ball screw receives power, the nut is sleeved on the ball screw and matched with the ball screw, and moves along the length direction of the ball screw with the rolling of the ball screw. The support unit includes: Sleeve, upper arm support and forearm support. The sleeve and the nut are fixedly connected and move synchronously. The upper arm support is used to place the upper arm of the human body and is movably connected with the sleeve. Driven by the sleeve, the length of the ball screw is The upper arm support can rotate around the axis of the ball screw, the forearm support is connected with the upper arm support for placing the forearm of the human body, and the control unit is used to control the operation of the drive unit.

The upper limb support device provided by the present invention may also have the following features: wherein the driving unit is a motor, and the transmission unit includes: a first bevel gear set, a reducer and a second bevel gear set, and the motor and the reducer pass through the first bevel gear set. The bevel gear set is connected, and the reducer is connected with the ball screw through the second bevel gear set to transmit power to the ball screw.

The upper limb support device provided by the present invention may also have such a feature, further comprising: a base and a main shaft, wherein the main shaft is vertically arranged on the base, the bottom end of the main shaft is provided with a cylindrical ball bearing, and the main shaft is provided with two The oppositely arranged vertical opening is used for the sleeve to move along the length direction of the ball screw. The ball screw is arranged in the main shaft, and the bottom end is connected with the cylindrical ball bearing. The upper arm support is fixedly connected and movably connected with the sleeve.

The upper limb support device provided by the present invention may also have the following feature: wherein the sleeve includes a sleeve body and two sleeve ears, the sleeve body is sleeved on the nut, and the two sleeve ears are respectively disposed on the sleeve Corresponding vertical openings extend outward from the two sides of the main body and along the radial direction of the main body of the sleeve, and the sleeve ears are provided with pin holes matched with the pins.

The upper limb support device provided by the present invention may also have the following feature: wherein the forearm support includes a forearm support and a forearm support, the forearm support is connected to the upper arm support, and the forearm support is provided on the forearm support.

The upper limb support device provided by the present invention may also have the following feature: wherein, the forearm support and the upper arm support are made of aluminum alloy material, the forearm support is made of flexible material, and the flexible material is nylon material.

The upper limb support device provided by the present invention may also have the following features: wherein the control unit includes a control switch and a controller, the control switch is used for inputting an instruction to the controller, and the controller is used for receiving the instruction of the control switch to control the nut rise or fall.

The upper limb support device provided by the present invention may also have the following feature: wherein, the control switch includes an ascending switch and a descending switch, the ascending switch is used to control the ascending of the nut, and the descending switch is used to control the descending of the nut.

The upper limb support device provided by the present invention may also have the following feature: wherein the ball screw and the nut have a self-locking function, and the nut can be fixed at a certain position on the ball screw.

The upper limb support device provided by the present invention may also have such a feature, further comprising: a battery, wherein the battery is used to provide electric power to the driving unit.

The role and effect of the invention

The upper limb support device provided by the present invention has a drive unit, a transmission unit, a support unit and a control unit, the transmission unit includes a ball screw and a nut, the support unit includes a sleeve, an upper arm support and a forearm support, and the nut is sleeved on the On the ball screw, the sleeve is sleeved on the nut, the upper arm support is movably connected with the sleeve, and the forearm support is connected with the upper arm support. The drive unit provides power, and the ball screw receives the power. As the ball screw rolls, the nut advances or retreats along the length of the ball screw, driving the sleeve to move synchronously, thereby driving the upper arm support and the forearm support to move synchronously. Through the cooperation of the ball screw and the nut, the transmission direction of the torque is changed, and the torque of the driving unit is converted into a linear motion, so that the upper arm support member moves linearly along the length direction of the ball screw. At the same time, the upper arm support can rotate around the axis of the ball screw to form a rotating pair. Therefore, the upper arm support drives the connected forearm support to move linearly along the axis of the ball screw and rotate in a plane perpendicular to the axis of the ball screw, thereby realizing the up and down movement and swing of the upper limb , which expands the range of motion of the user's arm. In addition, the upper arm support is movably connected with the sleeve, and the left and right can be interchanged according to the needs of the patient, or the upper arm support can be added on both sides.

Therefore, the present invention provides additional assistance through the drive unit, so that the user can conveniently raise or lower the height of the patient arm through the control unit, so as to conveniently complete some simple daily operations.

Description of drawings

1 is a schematic structural diagram of an upper limb support device in an embodiment of the present invention;

2 is a schematic structural diagram of a support unit of an upper limb support device in an embodiment of the present invention;

3 is a schematic structural diagram of a drive unit and a transmission unit of the upper limb support device in an embodiment of the present invention;

4 is a side view of a support unit, a drive unit and a transmission unit of the upper limb support device in the embodiment of the present invention; and

FIG. 5 is a schematic view of the upper limb support device installed on the wheelchair in the embodiment of the present invention.

Detailed ways

In order to make the technical means, creative features, achieved goals and effects of the present invention easy to understand, an upper limb support device of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings.

<Example>

This embodiment specifically describes the structure of the upper limb support device 100 .

1 is a schematic structural diagram of an upper limb support device in an embodiment of the present invention, FIG. 2 is a structural schematic diagram of a support unit of the upper limb support device in an embodiment of the present invention, and FIG. 3 is an upper limb support device in an embodiment of the present invention. Figure 4 is a side view of the support unit, the drive unit and the transmission unit of the upper limb support device in the embodiment of the present invention.

As shown in FIGS. 1 to 4 , the upper limb support device 100 is used to be installed on a wheelchair, and includes a base 10 , a main shaft 20 , a drive unit 30 , a transmission unit 40 , a support unit 50 , a control unit 60 and a battery 70 .

The base 10 is used to install the whole device on the wheelchair, and has a base frame 11 , a first fixing joint 12 and a base plate 13 .

The base frame 11 is placed horizontally under the seat of the wheelchair, and the first fixing joint 12 is fixedly installed on the side of the base frame 11 to cooperate with the wheelchair to fix the upper limb support device on the wheelchair. The base plate 13 is mounted on the upper surface of the base frame 11 for mounting the spindle 20 .

The main shaft 20 is a cylindrical barrel with a cavity in the middle, and is vertically installed on the base plate 13 . Two vertical openings 21 with the same structure are opened on the main shaft 20 opposite to each other.

The drive unit 30 is a DC motor and is fixed on the base frame 11 by hexagon head bolts.

A second fixing joint 31 is installed on the side of the DC motor, which cooperates with the wheelchair to fix the upper limb support device on the wheelchair.

The transmission unit 40 includes a first bevel gear set 41 , a reducer 42 , a second bevel gear set 43 , a ball screw 44 , a cylindrical ball bearing 45 and a nut 46 .

The first bevel gear set 41 is connected to the DC motor. The reducer 42 is mounted on the base plate 13 by hexagonal bolts and hexagonal nuts, one end of the reducer 42 is mounted with a first bevel gear set 41 , and the other end is mounted with a second bevel gear set 43 . The second bevel gear set 43 is connected with the ball screw 44 .

The ball screw 44 is arranged in the main shaft 20 , and the bottom end is connected with the cylindrical ball bearing 45 . Cylindrical ball bearings 45 are mounted on the base plate 13 at the bottom end of the main shaft 20 . The ball screw 44 rolls in the cylindrical ball bearing 45 .

The nut 46 is sleeved on the ball screw 44 , matched with the ball screw 44 , and moves up and down along the length direction of the ball screw 44 along with the rotation of the ball screw 44 to complete the ascending or descending. The ball screw 44 and the nut 46 have a self-locking function, that is, the nut 46 can be fixed at a certain position on the ball screw 44 without sliding down.

The first bevel gear set 41 rotates under the driving of the DC motor, and transmits the power to the reducer 42 . The power is decelerated by the reducer 42 and transmitted to the second bevel gear set 43, and then transmitted to the ball screw 44 to rotate the ball screw 44, so that the nut 46 follows the rotation of the ball screw 44 along the ball screw 44. Move up and down in the length direction to complete the rise or fall.

The DC motor changes the transmission direction of the torque through the first bevel gear set 41, and then transmits the transmission torque to the ball screw 44 in the main shaft 20 through the reducer 42, and converts the rotating motion of the gear of the DC motor into a nut through the screw nut mechanism 46 linear motion.

The support unit 50 includes a sleeve 51 , a latch 52 , an upper arm support 53 , a forearm support 54 , a metal link 55 and a metal disc joint 56 .

The sleeve 51 is sleeved on the nut 46 and is fixedly connected with the nut 46 , so it can move synchronously with the movement of the nut 46 .

The sleeve 51 includes an integrally formed sleeve body 511 and two sleeve ears 512 . The sleeve body 511 is sleeved on the nut 46 , and two sleeve ears 512 are respectively disposed on both sides of the sleeve body 511 and extend out of the vertical opening 21 along the radial direction of the sleeve body 511 . The two sleeve ears 512 are also respectively provided with pin holes for inserting the pins 52 into them. The sleeve body 511 moves up and down along the ball screw 44 with the movement of the nut 46 , and drives the sleeve ears 512 to move up and down in the vertical opening 22 .

The upper arm support 53 is used for placing the upper arm of the human body, and has a through hole formed thereon. The plug 52 passes through the through hole and the plug hole on the sleeve lug 512 , and the plug 52 and the ball screw 44 are parallel to each other. The upper arm support 53 is movably connected with the sleeve 51 through the latch 52 . The upper arm support 53 is fixedly connected with the latch 52 .

The bolt 52 can rotate around its own axis in the bolt hole, so it can drive the upper arm support 53 to rotate in the horizontal plane. The latch 52 and the upper arm support member 53 form a rotating pair, which can realize the movement of the upper arm support member 53 in the horizontal plane, thereby realizing the swing of the upper limb placed thereon. At the same time, since the bolt 52 cannot move up and down in the bolt hole, the upper arm support 53 moves along the length direction of the ball screw 44 under the driving of the sleeve ear 512 , that is, it rises in the vertical direction with the movement of the sleeve 51 Or drop.

The forearm support 54 is used to place the forearm of the human body, and is connected to the upper arm support 53 through a metal link 55 and a metal disc joint 56 .

One end of the metal link 55 is movably connected with the upper arm support 53 through a rotating shaft, and the other end is fixedly connected with the metal disc joint 56 . Since the rotation axis is perpendicular to the upper arm support 53 , the height of the metal link 55 from the ground is greater than the height of the upper arm support 53 . And because the rotating shaft can rotate in the horizontal plane around its own axis, the metal link 55 can also rotate in the horizontal plane. Therefore, the metal link 55 increases the range of motion of the arm in the horizontal and vertical directions.

A plurality of threaded holes are evenly distributed on the edge of the metal disc joint 56 for screws to pass through to be fixedly connected with the other end of the metal connecting rod 55 . The connection between the metal link 55 and the metal disc joint 56 can be changed by loosening the screw to change the fulcrum position, and then tightening the screw to fix it so as to change the up-and-down swing angle of the forearm support 54 . The metal disc joint 56 is also provided with a mounting groove.

The forearm support 54 includes a forearm bracket 541 , a forearm support 542 and a nylon strap 543 .

The forearm support 541 is a U-shaped frame and is parallel to the ground. The straight section of the U-shaped frame passes through the installation groove on the metal disc joint 56 to realize the fixed connection between the forearm bracket 541 and the metal disc joint 56 .

The forearm support 542 is a rectangular cloth piece made of flexible material. The opposite sides are respectively worn on the forearm support 541 and fixed, and naturally droops to form a semicircle or U-shape, which is convenient for placing the forearm of the human body.

One end of the nylon strap 543 is fixed to a straight section on one side of the forearm support 541, and the other end is provided with a Velcro. After the forearm is placed in the forearm support 542, the nylon strap 543 is passed around the forearm, and the end with the Velcro is matched with the Velcro provided on the back of the forearm support 542 to fix the forearm.

In the embodiment of the present invention, the upper arm support 53 and the forearm bracket 541 are made of aluminum alloy material with high strength and low density, and the forearm support 542 and the nylon strap 543 are made of nylon material.

The control unit 60 is used to control the operation of the DC electrolysis, and includes a controller 61 and a control switch 62 .

The controller 61 is installed on one side of the DC motor, and the control switch 62 is connected with the controller 61 by wires. The length of the wire can be set as required, so that the control switch 62 can be placed on the user's hand for easy manipulation.

The control switch 62 inputs a command to the controller 61 , and the controller 61 receives the command from the control switch 62 to control the rise or fall of the nut 46 .

The model number of the controller 61 is ZM-6405E. The control switch 62 includes an up switch 621 and a down switch 622 .

The user presses the lift switch 621, and the nut 46 rises to drive the upper arm support 53 to move upward to help the user lift his arm; press the lift switch 621 again, the nut 46 stops moving, and the upper arm support 53 stops rising synchronously and stays at the position. this. The user presses the lowering switch 622, the nut 46 is lowered and raised, thereby driving the upper arm support 53 to move downward to help the user to lower the arm slowly; by pressing the lowering switch 622 again, the nut 46 stops moving, and the upper arm support 53 synchronously stops falling and stops. stay here.

FIG. 5 is a schematic view of the upper limb support device installed on the wheelchair in the embodiment of the present invention.

As shown in FIG. 5 , the upper limb support device 100 further includes a battery 70 for providing power to the DC motor.

When the upper limb support device 100 is installed on an ordinary wheelchair, an additional battery 70 needs to be installed to supply power to the DC motor; if it is installed on an electric wheelchair, the DC motor can be directly connected to the battery of the electric wheelchair.

In this embodiment, the upper limb support device 100 is installed on a wheelchair. In practical applications, it can be installed where it is needed, such as on the side of a hospital bed.

Action and effect of the embodiment

The upper limb support device provided according to this embodiment has a drive unit, a transmission unit, a support unit and a control unit, the transmission unit includes a ball screw and a nut, the support unit includes a sleeve, an upper arm support and a forearm support, and the nut is sleeved on the On the ball screw, the sleeve is sleeved on the nut, the upper arm support is movably connected with the sleeve, and the forearm support is connected with the upper arm support. The drive unit provides power, and the ball screw receives the power. As the ball screw rolls, the nut advances or retreats along the length of the ball screw, driving the sleeve to move synchronously, thereby driving the upper arm support and the forearm support to move synchronously. Through the cooperation of the ball screw and the nut, the transmission direction of the torque is changed, and the torque of the driving unit is converted into a linear motion, so that the upper arm support member moves linearly along the length direction of the ball screw. At the same time, the upper arm support can rotate around the axis of the ball screw to form a rotating pair. Therefore, the upper arm support drives the connected forearm support to move linearly along the axis of the ball screw and rotate in a plane perpendicular to the axis of the ball screw, thereby realizing the up and down movement and swing of the upper limb , which expands the range of motion of the user's arm.

In addition, the upper arm support is movably connected with the sleeve, and the left and right can be interchanged according to the needs of the patient, or the upper arm support can be added on both sides.

In addition, the upper limb support device also includes a base and a main shaft vertically arranged on the base. The main shaft is provided with two opposite vertical openings, the bottom of the main shaft is provided with a cylindrical ball bearing, and the ball screw is vertically arranged in the main shaft. , the bottom end is connected with the cylindrical ball bearing, the sleeve is sleeved on the nut, and the sleeve ear extends out of the vertical opening. On the one hand, the vertical opening is used for the sleeve to run up and down, and on the other hand, it cooperates with the sleeve, so that the nut can only move up and down, and does not roll synchronously with the rolling of the ball screw.

In addition, the ball screw and the nut have a self-locking function, and the nut can be fixed at a certain position on the ball screw.

In addition, the sleeve ear is provided with a bolt hole matched with the bolt, the bolt rotates around its own axis but does not move up and down in the bolt hole, and forms a rotating pair together with the upper arm support. Because the latch can be easily removed from the latch hole, the upper arm support can be exchanged on the left and right of the sleeve according to the needs of the patient, or the upper arm support can be added on both sides. When replacing, just place it on the sleeve. On the other side, secure it with a pin.

In addition, both the forearm support and the upper arm support are made of aluminum alloy material. The aluminum alloy material has high strength and low density, and has certain mechanical strength, hardness and lightness.

In addition, the forearm support and nylon straps are made of nylon material, which is wear-resistant and economical.

In addition, the control switch includes an ascending switch and a descending switch, and the ascending or descending of the upper arm support can be easily controlled.

In addition, the upper limb support device also includes a battery, which is suitable for ordinary wheelchairs.

The above embodiments are preferred cases of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (10)

1. An upper limb support device, comprising:

A driving unit, a transmission unit, a supporting unit and a control unit,

Wherein the driving unit provides power to the transmission unit, the transmission unit transmits the power to the supporting unit,

The transmission unit includes: a ball screw and a nut, wherein,

The ball screw receives the power, the nut is sleeved on the ball screw and matched with the ball screw, and moves along the length direction of the ball screw along with the rolling of the ball screw,

The supporting unit includes: a sleeve, an upper arm supporting piece and a forearm supporting piece,

The sleeve is fixedly connected with the nut and moves synchronously,

The upper arm supporting piece is used for placing an upper arm of a human body and is movably connected with the sleeve, the upper arm supporting piece is driven by the sleeve to move along the length direction of the ball screw, and can rotate around the axis of the ball screw,

The forearm support part is connected with the upper arm support part and is used for placing the forearm of a human body,

The control unit is used for controlling the operation of the driving unit.

2. The upper extremity supporting device of claim 1, wherein:

Wherein the driving unit is a motor,

The transmission unit further includes: a first conical gear set, a speed reducer and a second conical gear set,

The motor is connected with the speed reducer through the first conical gear set, and the speed reducer is connected with the ball screw through the second conical gear set so that the power is transmitted to the ball screw.

3. The upper extremity supporting apparatus according to claim 1, further comprising:

A base and a main shaft, wherein the main shaft is provided with a main shaft,

Wherein the main shaft is vertically arranged on the base,

The bottom end of the main shaft is provided with a cylindrical ball bearing, the main shaft is provided with two vertical openings which are oppositely arranged and used for the sleeve to move along the length direction of the ball screw,

The ball screw is arranged in the main shaft, the bottom end of the ball screw is connected with a cylindrical ball bearing,

The upper arm supporting piece is movably connected with the sleeve through a bolt, and the bolt is fixedly connected with the upper arm supporting piece and movably connected with the sleeve.

4. The upper extremity supporting device of claim 3, wherein:

Wherein the sleeve comprises a sleeve main body and two sleeve ears, the sleeve main body is sleeved on the nut, the two sleeve ears are respectively arranged at two sides of the sleeve main body and extend outwards along the radial direction of the sleeve main body to form the corresponding vertical openings,

And the sleeve lug is provided with a bolt hole matched with the bolt.

5. The upper extremity supporting device of claim 3, wherein:

Wherein the forearm support piece comprises a forearm support and a forearm support,

The forearm support with upper arm support piece is connected, the forearm support is worn to establish on the forearm support.

6. The upper extremity supporting device of claim 5, wherein:

Wherein the forearm support and the upper arm support are made of aluminum alloy materials,

The forearm support is made of flexible materials, and the flexible materials are made of nylon materials.

7. The upper extremity supporting device of claim 3, wherein:

Wherein the control unit comprises a control switch and a controller,

The control switch is used for inputting instructions to the controller, and the controller is used for receiving the instructions of the control switch so as to control the nut to ascend or descend.

8. The upper extremity support apparatus of claim 7, wherein:

Wherein the control switch comprises an ascending switch and a descending switch,

The ascending switch is used for controlling the ascending of the nut, and the descending switch is used for controlling the descending of the nut.

9. The upper extremity supporting device of claim 1, wherein:

The ball screw and the nut have a self-locking function, and the nut can be fixed at a certain position on the ball screw.

10. The upper extremity supporting apparatus according to claim 1, further comprising:

A battery pack having a plurality of batteries,

Wherein the battery is used for providing electric energy for the driving unit.

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