KR102155358B1 - Electronic wheelchair with armrest operation mechanism - Google Patents

Abstract

An electric wheelchair having an armrest operation mechanism of the present invention includes: a seat including a backrest part, a chair part, and an armrest part; a lifting and lowering device connected to the seat; a driving part connected to a rear wheel driving the lifting and lowering device; and an operation control means connecting the backrest part and the armrest part to stop a drive of the lifting and lowering device and the rear wheel by the driving part by recognizing a dangerous situation when the armrest part does not horizontally return to an original position for a predetermined time after the armrest is vertically rotated and operated in an manual manner, thereby preventing falling accidents in advance.

Description

Electric wheelchair with armrest motion mechanism {ELECTRONIC WHEELCHAIR WITH ARMREST OPERATION MECHANISM}

The present invention relates to an electric wheelchair having an armrest operation mechanism, and more particularly, to an electric wheelchair having an armrest operation mechanism capable of controlling the driving state of the electric wheelchair according to the position of the armrest.

In relation to wheelchairs for improving mobility of a disabled person or a patient, in recent years, the spread of electric wheelchairs in which wheels are driven by rotation of an electric motor according to a user's manipulation is increasing.

The conventional electric wheelchair consists of a fixed armrest and a manual rotation armrest installed at a certain height on the left and right sides of the seat.

That is, the fixed armrest has a disadvantage in that it is inconvenient to board due to interference of the armrest when the occupant boards, but there is an advantage of preventing a fall.

On the other hand, the manual rotary armrest has the advantage of providing convenience on board by being rotated vertically, but there is a disadvantage in that it cannot prevent falls if the armrest is not in its original position.

Therefore, for the convenience of boarding, the manual rotation armrest is a structure that does not generate a forced safety mode that recognizes as a dangerous situation even if a certain time elapses after a certain time has elapsed after it is rotated vertically toward the backrest, or it is not positioned horizontally. However, there is a problem that it is not possible to prevent a fall accident from the seat when driving the electric wheelchair.

Republic of Korea Patent Publication No. 10-2012-0059999 (2012.06.11)

An object of the present invention has been proposed to solve the problems in consideration of the existing problems, and if the armrest is not rotated vertically for a certain period of time after being manually operated, it is recognized as a dangerous situation and can be switched to the safe mode. It is to provide an electric wheelchair equipped with a motion mechanism.

An electric wheelchair having an armrest operation mechanism according to an embodiment of the present invention for solving the above technical problem includes a seat including a backrest, a chair, and an armrest; An elevator connected to the seat; A driving unit connected to a rear wheel driving the lifter; And an operation control means for connecting the backrest part and the armrest part so that when the armrest part is not horizontally positioned for a certain time after being rotated by a certain angle, it recognizes as a dangerous situation and stops driving the lifter and the rear wheel by the driving part. Characterized in that.

In another embodiment, the operation control means of the present invention comprises: a fixed pipe connected to the backrest; A sensing unit coupled at a predetermined distance from the end of the fixed pipe; A stopper coupled to the end of the fixed pipe; And a coupling hole formed at an end of the armrest and coupled to the stopper.

In another embodiment, the fixing pipe and the stopper of the present invention are bolted in the axial direction.

In another embodiment, the stopper of the present invention is characterized in that the symmetrical block surfaces are formed to protrude from the outer circumferential surface of the end of the fixing pipe at a distance of 180° so as to be coupled to the coupling hole.

In another embodiment, the coupling hole of the present invention has a contact surface that is in contact with the block surface on one side of the inner circumferential surface to limit the rotation angle of the armrest, and a non-contact surface that is non-contact with the block surface on the other side of the inner circumferential surface to induce rotation of the armrest. It is characterized by being formed.

In another embodiment, the contact surface of the present invention is formed symmetrically with a 180° interval from the inner circumferential surface of the coupling hole, and the non-contact surface is formed symmetrically with a 180° interval between the contact surfaces on the inner circumferential surface of the coupling hole do.

In another embodiment, the armrest portion of the present invention is characterized in that it is rotated vertically and then stopped in a state rotated further by 5° from the vertical to the rear of the backrest portion so that it is not positioned by its own weight.

In another embodiment, the sensing unit of the present invention is characterized in that it detects a rotation operation or an original position of the armrest according to a change in the position of the contact surface and the non-contact surface of the coupling hole.

In another embodiment, the sensing unit of the present invention includes a warning sound or a caution message voice guidance sound when the armrest is not rotated vertically for a certain period of time after being manually rotated vertically.

In another embodiment, the detection unit of the present invention is characterized in that it comprises a transmission unit for transmitting a dangerous situation when the armrest is not vertically rotated manually for a certain period of time after the armrest is vertically rotated.

The electric wheelchair equipped with the armrest operation mechanism of the present invention is converted to a safety mode to stop driving the electric wheelchair by recognizing that it is a dangerous situation if the armrest is not rotated vertically for a certain period of time after being manually operated for boarding convenience. Because it is a structure that can be used, it has the effect of preventing the occupant from falling.

1 is a side view showing a state in which the seat is lowered in a conventional electric wheelchair;
Figure 2 is a side view showing a state in which the seat is raised in the electric wheelchair according to the related art;
3 is a side configuration view of the seat in the first position in the electric wheelchair according to the present invention,
Figure 4 is a side configuration view of the seat in a second position in the electric wheelchair according to the present invention,
Figure 5 is a side configuration view of the seat in a third position in the electric wheelchair according to the present invention,
6 is a side exterior view of the electric wheelchair according to the present invention,
7 is a combined perspective view showing a state in which the armrest operation mechanism is applied to the backrest according to the present invention,
8 is an exploded perspective view showing an operation control means according to the present invention,
9 is a longitudinal sectional view showing a state in which the operation control means according to the present invention is coupled to the armrest;
10A and 10B are side views showing a state in which the motion control means according to the present invention is rotated horizontally or vertically by connecting the backrest and the armrest;
11 is a side view showing a state in which the armrest is further rotated 5° from the vertical to the rear of the backrest by the operation control means according to the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. Accordingly, the shape of the element in the drawings may be exaggerated to emphasize a clearer description. It should be noted that in each drawing, the same configuration may be indicated by the same reference numeral. Detailed descriptions of known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a side configuration diagram of the seat in the first position in the electric wheelchair according to the present invention, Figure 4 is a side configuration diagram in the second position of the seat in the electric wheelchair according to the present invention, and Figure 5 is In the electric wheelchair, the seat is a side configuration view in the third position, and FIG. 6 is a side view of the electric wheelchair according to the present invention.

Here, the first position refers to a position in which the height of the chair part of the seat to be described later is the same as the height of the upper surface of the main frame of the drive unit, and the second position refers to the position where the chair part of the seat comes into contact with the ground. 3 position means the position when the chair part of the seat is at the highest height from the ground.

The electric wheelchair according to the present invention includes a seat 10 including a backrest 12, a chair 14, and an armrest 16 as shown in FIGS. 3 to 6; An elevating device 20 connected to the seat 10; A driving unit 30 connected to the rear wheel 32 driving the lifter 20; And when the backrest part 12 and the armrest part 16 are connected to each other so that the armrest part 16 is not rotated by a certain angle by manual operation and is not positioned horizontally for a certain period of time, it is recognized as a dangerous situation and the driving part 30 ) By means of an operation control means 40 for stopping the driving of the lifter 20 and the rear wheel 32.

That is, the armrest unit 16 recognizes a dangerous situation by the operation control means 40 when the armrest unit 16 is not rotated by a certain angle manually for a certain amount of time and then is not positioned for a certain time for convenience of boarding, and the detection signal By switching to the safety mode to stop the driving of the lifter 20 and the rear wheel 32 by the drive unit 30, the lifting operation of the seat 10 or the driving of the electric wheelchair is blocked to prevent a fall accident in advance. do.

And, after the armrest unit 16 is manually rotated vertically as shown in FIG. 10A for convenience of boarding, if it is horizontally positioned within a certain time or horizontally after a certain time as shown in FIG. 10B, the operation is controlled. By determining the normal mode according to the detection signal of the means 40 and driving the lifter 20 and the rear wheel 32 by the driving unit 30, the lifting operation of the seat 10 or the driving of the electric wheelchair is possible. .

At this time, the armrest part 16 is configured to be rotated vertically as shown in FIG. 11 and then stopped in a state rotated further 5° to the rear of the backrest part 12 from the vertical so that it is not positioned by its own weight.

Meanwhile, the lifter 20 includes a main link assembly 21 and an auxiliary link assembly 22 supported and driven by the driving unit 30.

That is, the main link assembly 21 includes a driving unit 30 connected to the rear wheel 32 driving the lifter 20; Sheet 10; One side is connected to the driving unit 30, the other side is a first link 23 and a second link 24 connected to the seat 10; A first actuator 25 having one side connected to the driving unit 30 and the other side connected to the first link 23; The first link (23) connected to the seat (10)-the first link (23), which is the position of the connection point of the seat (10), is the second link (24) connected to the seat (10)-of the sheet (10). It is located at a position higher by a first distance L1 than the second link 24, which is the position of the connection point, and the connection point of the first link 23-sheet 10 and the second link 24-sheet ( The connection point of 10) is formed on the backrest part 12 of the seat 10, and according to the operation of the first actuator 25, the main frame 31 of the driving part 30 from the ground in front of the driving part 30 ) The sheet 10 is configured to move up and down in a certain track while maintaining parallel to the ground up to the maximum height in the vertical direction of the upper surface.

At this time, the first link 23 and the first link (23) to which the driving unit 30 is connected-a connection point of the driving unit 30; A second link (24) to which the second link (24) and the driving unit (30) are connected-a connection point between the driving unit (30); The location of the connection point of the first link 23-the driving unit 30 is configured to be located higher than the connection point of the second link 24-the driving unit 30 by a second distance L2.

The distance between the connection point of the first link 23 and the seat 10 and the connection point between the first link 23 and the driving unit 30 is a connection point between the second link 24 and the seat 10 and the second link ( 24)-It is configured equal to the distance of the connection point of the driving unit 30.

Further, the auxiliary link assembly 22 may include a third link 26 connected to a front wheel frame to be described later of the driving unit 30; A fourth link 27 having one side connected to the backrest 12; The third link 26 and the fourth link 27 are hinge-coupled at a link connection part 28, and a second actuator having one side hingedly connected to the link connection part 28 and the other side to the driving part 30 ( 29) is configured to be additionally formed.

At this time, when the second actuator 29 is pre-operated and the seat 10 is spaced a predetermined distance from the ground in front of the driving unit 30, the first actuator 25 is operated after the seat 10 The second actuator (29) and the second actuator (29) and the second actuator (29) and the second actuator (29) and the second actuator (29) to move up and down in a certain trajectory while maintaining parallel to the ground up to the maximum height in the vertical direction of the upper surface of the main body frame (31) of the driving part (30) 1 The actuator 25 is operated sequentially.

The third link 26, the link connection part 28, and the intervening angle (a) of the third link 26-the fourth link 27 formed in the fourth link 27 is the second actuator 29 ), and as it becomes smaller than 180°, the position of the sheet 10 becomes lower than the maximum position, and when the sheet 10 is placed on the ground, it is a minimum angle and a maximum of 180°.

The length of the fourth link 27 is longer than the length of the third link 26.

First, we define and explain the angles.

The angle α may be changed by the operation of the second actuator 323.

In more detail, the angle α between the third link 26 and the fourth link 27 is a minimum angle when the sheet 10 is positioned on the ground, and may be 180 degrees from the maximum height.

When the angle α is changed from an acute angle (including 0 degrees) to 180 degrees toward the forward direction of the sheet 10, the minimum height to the maximum height is realized. 180 degrees means the angle at the highest position (maximum height) of the sheet.

In other words, when the lower surface of the sheet 10 is in contact with the ground, the angle α may be an acute angle, and at the height where the lower surface of the sheet 10 is maximum spaced apart from the ground, the angle α may be 180 degrees. .

If the intervening angle α of the third link 26-the fourth link 27 is greater than 180 degrees, the position of the seat 10 may be lower than the highest position.

The seat 10 has an acute angle between the third link 26 and the fourth link 27, which was formed at an acute angle toward the forward direction of the seat 10 with respect to the link connection part 28, a 180° As it rises.

The driving unit 30 may include a main frame 31 supporting the main link assembly 21 and the auxiliary link assembly 22 of the lifter 20 to drive the link; A rear wheel 32 driven by a driving motor (not shown) mounted inside the main frame 31; A front wheel 33 mounted on and driven by a front wheel frame 34 protruding forward of the body frame 31; It is mounted on the rear of the main frame 31 to constitute an auxiliary wheel 35 that prevents the electric wheelchair from falling backward.

In this way, when the driving unit 30 is driven to lower the seat 10 to the lowest height as shown in FIG. 4, the chair portion 14 of the seat 10 is lower than the lower surface of the main frame 31 and is in contact with the ground. The ground contact portion and the height of the rear wheel 32 are maintained at the same level.

At this time, the length of the fourth link 27 is reduced to the minimum, the first distance L1 and the second distance L2 are in the same state, and the angle a is an acute angle.

In this state, when the second actuator 29 is operated to raise the seat 10, the angle a is gradually increased.

In addition, since the fourth link 27 is in a minimum contraction state, the push force of the second actuator 29 is completely transmitted to the seat 10 so that the seat 10 can rise from the ground.

In addition, since the intervening angle (a) is an acute angle and the third link 26 and the fourth link 27 are hinged to each other at the connection point, it is possible to raise the seat 10 with less force. 1 The initial driving load of the actuator 25 is significantly reduced.

Conversely, even when the seat 10 is lowered to the second position, in particular, since the auxiliary link assembly 22 performs a kind of damper role, the seat 10 reduces the driving load of the first actuator 25 and reduces the seat 10 ) The descending motion can be made more stable.

On the other hand, when the driving unit 30 is driven to raise the seat 10 to the highest height as shown in 5, the chair portion 14 of the seat 10 is at a higher position than the upper surface portion of the main frame 31, and the chair The center of the seat edge portion where the portion 14 and the backrest portion 12 are in contact is located on the same vertical line as the link connecting portion 28.

At this time, the intervening angle (a) is an obtuse angle and can be changed up to 180°, the third distance (L3) becomes the same as the fourth distance (L4), and the fourth link 27 is in a state in which the length is maximized. do.

Accordingly, when the seat 10 is raised to a predetermined height from the first position, it is raised by the force of the first actuator 25, and the fourth link 27 extends in length with the rise of the seat 10.

On the other hand, the operation control means 40, as shown in Figs. 8 and 9, the fixing pipe 42 connected to the backrest 12; A sensing unit 44 coupled at a predetermined distance from the end of the fixed pipe 42; A stopper 46 coupled to the end of the fixing pipe 42; And a coupling hole 48 formed at the end of the armrest part 16 and coupled to the stopper 46.

That is, a stepped surface inserted into the coupling hole 48 is formed at the end of the fixing pipe 42, and the position is fixed by being inserted into the outer circumference of the stepped surface in a sequence of a ring-shaped sensing unit 44 and a stopper 46 After that, the fixing pipe 42 and the stopper 46 are fastened by a bolt 50 in the axial direction.

The sensing unit 44 is configured to detect a rotational operation or an original position of the armrest unit 16 according to a change in the position of the contact surface 48a and the non-contact surface 48b of the coupling hole 48.

In addition, the sensing unit 44 includes a warning sound or a caution message voice guidance sound when the armrest unit 16 is not rotated vertically for a certain period of time after being manually rotated.

The sensing unit 44 includes a transmission unit that transmits a dangerous situation when the armrest unit 16 is not rotated vertically by manual operation and is not horizontally positioned for a certain period of time.

The stopper 46 has a block surface 46a which is symmetrical with a 180° interval on the outer peripheral surface of the end of the fixing pipe 42 so as to be coupled to the coupling hole 48, respectively.

The coupling hole 48 is in contact with the block surface 46a on one side of the inner circumferential surface to form a contact surface 48a for limiting the rotation angle of the armrest 16, and non-contact with the block surface 46a on the other side of the inner circumferential surface As a result, a non-contact surface 48b for inducing the rotation of the armrest 16 is formed.

At this time, the contact surface (48a) is formed at a certain distance from the outer side end of the coupling hole (48), the inner circumferential surface between the outer side end of the coupling hole (48) and the contact surface (48a) is a fixing pipe (42) A stopper (not shown) is fitted so that the fastened state of the and stopper 46 is not exposed to the outside.

The contact surface 48a is formed to be symmetrical with a 180° interval from the inner circumferential surface of the coupling hole 48, and the non-contact surface 48b is 180 between the contact surfaces 48a on the inner circumferential surface of the coupling hole 48. It is formed symmetrically at intervals of °.

On the other hand, the present invention is not limited only to the above-described embodiments, but can be carried out with modifications and variations without departing from the gist of the present invention, and the technical idea to which such modifications and modifications are applied also belong to the following claims. Must see.

10: seat 12: backrest
14: chair part 16: armrest part
20: Lee lift 21: main link assembly
22: auxiliary link assembly 23: first link
24: second link 25: first actuator
26: third link 27: fourth link
28: link connection 29: second actuator
30: drive unit 31: body frame
32: rear wheel 33: front wheel
34: front wheel frame 40: motion control means
42: fixed pipe 44: sensing unit
46: stopper 46a: block surface
48: coupling hole 48a: contact surface
48b: non-contact surface 50: bolt
L1: first distance L2: second distance
L3: 3rd street L4: 4th street
α, a: angle

Claims (10)

A seat 10 including a backrest 12, a chair 14 and an armrest 16;
An elevating device 20 connected to the seat 10;
A driving unit 30 connected to the rear wheel 32 driving the lifter 20; And
When the backrest part 12 and the armrest part 16 are connected and the armrest part 16 is not horizontally positioned for a certain period of time after being rotated by a certain angle, it is recognized as a dangerous situation and lifted by the driving part 30 (20) and an operation control means (40) for stopping driving of the rear wheel (32),
The operation control means 40,
A fixing pipe 42 connected to the backrest 12;
A sensing unit 44 coupled at a predetermined distance from the end of the fixed pipe 42;
A stopper 46 coupled to the end of the fixing pipe 42; And
It is formed at the end of the armrest portion 16 and includes a coupling hole 48 coupled to the stopper 46,
The fixing pipe 42 and the stopper 46 are fastened with bolts 50 in the axial direction,
The stopper 46 has a block surface 46a which is symmetrical with a 180° interval on the outer circumferential surface of the end of the fixing pipe 42 so as to be coupled to the coupling hole 48, respectively,
The coupling hole 48,
A contact surface 48a is formed on one side of the inner circumferential surface to limit the rotation angle of the armrest 16 by being in contact with the block surface 46a,
A non-contact surface 48b is formed on the other side of the inner circumferential surface to induce rotation of the armrest 16 by being non-contact with the block surface 46a,
The contact surface (48a) is formed to be symmetrically spaced 180° from the inner circumferential surface of the coupling hole (48),
The non-contact surface 48b is formed symmetrically with a 180° interval between the contact surfaces 48a on the inner circumferential surface of the coupling hole 48,
The armrest unit 16 is an electric wheelchair having an armrest operation mechanism, characterized in that the armrest unit 16 is rotated vertically and then stopped in a state rotated further 5° to the rear of the backrest unit 12 so that it is not positioned by its own weight.
delete delete delete delete delete delete The method according to claim 1,
The sensing unit 44 is an armrest operation mechanism, characterized in that it detects a rotational operation or an original position of the armrest unit 16 according to a change in the position of the contact surface 48a and the non-contact surface 48b of the coupling hole 48 Electric wheelchair equipped with.
The method of claim 8,
The sensing unit 44 comprises a warning sound or a caution message voice guidance sound emitting unit when the armrest unit 16 is not vertically rotated manually for a certain period of time and then is not positioned horizontally. Electric wheelchair with motion mechanism.
The method of claim 8,
The sensing unit 44 includes a transmission unit for transmitting a dangerous situation when the armrest unit 16 is not vertically rotated manually for a certain period of time after the armrest unit 16 is rotated vertically. Equipped electric wheelchair.

Images