TWM554788U - Auxiliary power device and wheelchair - Google Patents

Description

Auxiliary power unit and wheelchair

The present invention relates to an auxiliary power unit, and more particularly to an auxiliary power unit having an auxiliary movement and capable of automatically returning when offset, and a wheelchair thereof.

A wheelchair is a kind of mobility aid that is designed for people who have difficulty walking on the lower limbs (legs). The conventional wheelchair mainly relies on the user's own force to advance or retreat the wheelchair. The action is performed by the user holding the two hands on the auxiliary ring outside the wheel body and pushing forward or backward. The force in the auxiliary ring will drive the wheel to rotate, causing displacement changes in the wheelchair.

However, the above method is that it needs to be driven by human power completely, which results in a large physical effort in use, and since the user is mostly an elderly person or a patient, the hand strength may not be enough to hold the auxiliary for a long time. The ring pushes the wheelchair, and the posture of holding the auxiliary ring requires the user to open the arms sideways and apply the force obliquely downward. The force application method is not completely ergonomic, and the arms will lack support points and length. Under the push of time, it may cause fatigue damage to the upper limbs. In addition, if the user directly applies force to the wheel body, it will inevitably result in a more laborious operation, and the utility of the force application cannot be maximized to achieve a labor-saving effect, especially in an uphill road section.

In view of this, the conventional wheelchairs still have the need to improve.

In order to solve the above problems, the object of the present invention is to provide an auxiliary power unit which is capable of automatically moving back and automatically returning when the wheelchair is moved forward.

A second object of the present invention is to provide a wheelchair having an auxiliary power unit that has an auxiliary movement and that automatically returns to the position when the offset advances.

The following directional or similar terms, such as "before", "after", "upper (top)", "lower", "inside", "outside", "side", etc. With reference to the orientation of the additional drawings, the directionality or its approximation is only used to assist in the description and understanding of the embodiments of the present invention, and is not intended to limit the present invention.

The auxiliary power device of the present invention comprises: a set of connecting units having a base and a central shaft, the central shaft being rotatable relative to the base, the connecting unit further having a guiding portion, the guiding portion An auxiliary unit has a wheel frame and an auxiliary wheel, the wheel frame is pivotally connected to the assembly unit, and the wheel frame and the auxiliary wheel are pivotally connected by an engagement shaft. The auxiliary unit further has a rotating member that abuts the guiding portion for guiding the auxiliary wheel.

The wheelchair of the present invention has the auxiliary power unit.

Accordingly, the auxiliary power device of the present invention provides the power component to the auxiliary wheel by the acceleration of the movement of the wheelchair, thereby assisting the wheelchair to move; and the rotating member of the auxiliary unit and the assembly unit The arrangement of the guiding portion, when turning or bumping the road surface, the rotating member will automatically move back to the center of the guiding portion, so that the wheelchair can continue to move linearly to provide automatic returning function when offset.

The central axis of the assembly unit has a first pivot hole, and the wheel frame of the auxiliary unit has a second pivot hole, and the second pivot hole and the first pivot hole of the central axis are A pivotal joint is combined. In this way, it has the effect of rotating the central shaft to drive the driving wheel to rotate.

The assembly unit further has at least one connecting rod, one end of the at least one connecting rod is movably connected to the base, and the other end of the at least one connecting rod is movably connected to a frame, and is respectively plural The connecting members are pivoted. So having at least one connecting rod The effect of being movably pivoted between the base and the frame.

The number of the at least one connecting rod is two. In this way, the at least one connecting rod is movably pivoted between the base and the frame.

The assembly unit further has at least one elastic member disposed between the at least one connecting rod and the frame body. In this way, it has the function of providing the at least one connecting rod and pulling force to avoid the auxiliary unit from idling off the ground.

The guiding portion is disposed under the base, and the guiding portion extends from the center to both sides and forms a symmetrical slope. In this way, it has the effect of being able to cooperate with the rotating member and providing automatic correction.

The binding unit further has a limiting block and a micro switch. The limiting block is disposed on the top of the base, and the micro switch is disposed on the central axis and abuts the limiting block. In this way, it has the effect of being electrically connected to the power element and controlling whether power is supplied.

The power wheel is internally provided with a power component, and the power component is electrically connected to the micro switch of the grouping unit. In this way, it has the effect of estimating the power to the auxiliary wheel.

The rotating member is disposed through a shaft, and the shaft is disposed at a guiding seat of the auxiliary unit, and the rotating member protrudes from the guiding seat. In this way, it has the effect of being able to cooperate with the guiding portion and providing automatic correction.

1‧‧‧assembly unit

11‧‧‧Base

12‧‧‧ center axis

121‧‧‧First pivot hole

13‧‧‧ Connecting rod

14‧‧‧Connecting parts

15‧‧‧Flexible parts

16‧‧‧Guidance

17‧‧‧Limited blocks

18‧‧‧Micro Switch

2‧‧‧Auxiliary unit

21‧‧‧round frame

22‧‧‧Second pivot hole

23‧‧‧ pivotal parts

24‧‧‧Joint axis

25‧‧‧Assistance wheel

26‧‧‧Power components

27‧‧‧ tip hole

28‧‧‧ shaft

29‧‧‧Rotating parts

20‧‧‧Guide

A‧‧‧ frame

B‧‧‧ wheel body

Θ‧‧‧predetermined angle

Fig. 1 is a perspective view showing an embodiment of the present creation.

Fig. 2 is a partially exploded perspective view showing an embodiment of the present invention.

Figure 3: A combined top view of an embodiment of the present invention.

Figure 4: A partial front view of an embodiment of the present invention.

Fig. 5 is a schematic view showing the uncompressed structure of the spring member as shown in Fig. 4.

Figure 6 is a schematic view showing the structure of the rotating member against the guiding portion of the embodiment of the present invention.

Figure 7: A partial action situation diagram as shown in Figure 3.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. The auxiliary power unit of the present invention comprises a set of connecting units 1 and an auxiliary unit 2, which can be mounted on a frame A of a wheelchair, the auxiliary unit 2 being pivotally connected to the connecting unit 1 and assisting the wheelchair mobile.

Referring to Figures 2 and 3, the assembly unit 1 is mounted on a frame A of a wheelchair. The assembly unit 1 has a base 11 and a central shaft 12, and the central shaft 12 is opposite to the base 11. Rotating, and the central shaft 12 has a first pivot hole 121; the assembly unit 1 further has at least one connecting rod 13 , and one end of the at least one connecting rod 13 is movably connected to the base 11 , the at least one The other end of the connecting rod 13 is movably connected to the frame body A, and is pivotally connected to the plurality of connecting members 14 respectively, so that the at least one connecting rod 13 is movably pivotally connected to the base 11 and the frame body. Between A, the number of the at least one connecting rod 13 may be one or two. The present invention is not limited. In the embodiment, the number of the at least one connecting rod 13 is two.

Referring to the figures 2, 4, and 5, the assembly unit 1 further has at least one elastic member 15 (for example, a compression spring), and the at least one elastic member 15 is disposed on the at least one connecting rod 13 and the frame body A. Providing a pulling force of the at least one connecting rod 13 to ensure that the auxiliary wheel 25 of the auxiliary unit 2 can always abut against the grounding surface to have a frictional force between the auxiliary unit 2 and the ground, thereby avoiding sliding or leaving the ground. The idling (as shown in Fig. 4), the number of the at least one elastic member 15 is preferably two, whereby a symmetrical pulling force can be applied.

Referring to FIGS. 2 and 6 , the assembly unit 1 further has a guiding portion 16 disposed under the base 11 , and the guiding portion 16 extends from the center to the sides and forms a symmetry. The slope (as shown in Figure 6).

Referring to Figures 2, 3, and 7, the assembly unit 1 further has a limit block 17 and a micro switch 18 is disposed on the top of the base 11 , and the limiting block 17 is preferably annular and coaxial with and spaced apart from the central axis 12 , and the micro switch 18 is disposed at the center The shaft 12 abuts against the limiting block 17, and the micro switch 18 can rotate with the central axis 12 at a predetermined angle θ (as shown in FIG. 7). When the central axis 12 rotates at an angle smaller than the predetermined angle θ The micro switch 18 can still abut the limiting block 17; when the central axis 12 rotates relative to the base 11, the angle of rotation is greater than the predetermined angle θ, and the micro switch 18 will exceed the limiting block The range of 17 is not able to abut the limit block 17.

Referring to FIG. 2 , the auxiliary unit 2 is pivotally connected to the assembly unit 1 . The auxiliary unit 2 has a wheel carrier 21 . The wheel carrier 21 is preferably U-shaped. The wheel carrier 21 has a second pivot hole. The second pivot hole 22 is pivotally connected to the first pivot hole 121 of the central shaft 12 by a pivoting member 23, so that the wheel frame 21 can be rotated by the central shaft 12. The auxiliary unit 2 further has an engagement shaft 24 and an auxiliary wheel 25 that is rotatably coupled to the wheel carrier 21 by the engagement shaft 24.

Please refer to FIGS. 2 and 7 , wherein the auxiliary wheel 25 is internally provided with a power component 26 , and the power component 26 is electrically connected to the micro switch 18 of the assembly unit 1 when the angle of rotation of the central axis 12 is less than the predetermined At the angle θ, the micro switch 18 can still abut the limiting block 17, so that the power component 26 can provide a power to rotate the auxiliary wheel 25; when the central axis 12 rotates at an angle greater than the predetermined angle θ, The micro switch 18 will extend beyond the limit block 17 and cannot abut the limit block 17 (as shown in FIG. 7 ). Thus, the micro switch 18 is disconnected, so that the power element 26 is electrically connected. The power element 26 is rendered incapable of providing power and driving the auxiliary wheel 25 to rotate.

Referring to Figures 2, 6, and 7, the auxiliary unit 2 further has a guiding base 20, and the guiding base 20 is provided with a shaft hole 28 for a shaft 28, and the shaft 28 has an movable mechanism. One of the rotating members 29 is rotated, and the rotating member 29 protrudes from the guide base 20. When the auxiliary wheel 25 is not rotated, the rotating member 29 does not abut the guiding portion 16 of the assembly unit 1; when the auxiliary wheel 25 rotates The rotating member 29 abuts the guiding portion 16 of the assembly unit 1 when moving. When the central shaft 12 rotates relative to the base 11, the rotating member 29 can simultaneously rotate with the central shaft 12 at a predetermined angle θ. When the central shaft 12 rotates at an angle greater than the predetermined angle θ, the rotating member 29 will also exceed the range of the guide portion 16.

Referring to Figures 2, 6, and 7, when the rotating member 29 rotates with the central shaft 12 within a predetermined angle θ, the rotating member 29 is slightly deflected from the center of the guiding portion 16 to the left or to the right. Shifting, and the rotating member 29 abuts against the guiding portion 16, and the guiding portion 16 is symmetrical with respect to the two sides from the center, so that the rotating member 29 will slide against the guiding portion 16 a central portion that guides the auxiliary wheel 25 to the auxiliary power in a straight forward direction; when the angle at which the central shaft 12 rotates is greater than the predetermined angle θ, the rotating member 29 leaves the range of the guiding portion 16, so that The micro switch 18 also exceeds the limit block 17 and cannot abut the limit block 17 (as shown in FIG. 7 ). At this time, the power element 26 is electrically connected, so that the power element 26 cannot provide power and The auxiliary wheel 25 is driven to rotate.

Referring to Figures 2, 6, and 7, according to the foregoing configuration, when the wheelchair in which the artificial auxiliary power unit is assembled is used, the user pushes each of the wheel bodies B of the wheelchair with a slight force, and the rotating member 29 of the auxiliary unit 2 Abutting the guiding portion 16 of the assembly unit 1 while the micro switch 18 still abuts against the limiting block 17, the power component 26 can provide a power to rotate the auxiliary wheel 25, so that the auxiliary wheel 25 can assist The wheelchair is moved; in addition, when turning or bumping the road surface, the rotating member 29 of the auxiliary unit 2 is slightly offset from the center of the guiding portion 16 to the left or to the right, and the guiding portion 16 is moved from the center to the center. The inclination of the two sides and the angle of the rotation of the rotating member 29 are smaller than the predetermined angle θ, so that the rotating member 29 is slidably abutted at the center of the guiding portion 16, so that the auxiliary wheel 25 can be guided to Auxiliary power in the direction of the straight line to drive the wheelchair to move linearly to provide stability during movement.

Referring to FIGS. 2 and 7 , when the rotation angle of the central shaft 12 is greater than the predetermined angle θ, the rotating member 29 of the auxiliary unit 2 leaves the range of the guiding portion 16 and does not abut. The guiding portion 16 and the micro switch 18 also exceed the limit block 17 and cannot abut the limiting block 17. The micro switch 18 makes the power component 26 electrically connected, so that the power component 26 cannot be Providing power and driving the auxiliary wheel 25 to rotate, whereby the user can easily push each of the wheel bodies B of the wheelchair to turn, and when the user is reset to straight forward, the rotating member 29 of the auxiliary unit 2 moves back and abuts The guiding portion 16 , while the micro switch 18 abuts against the limiting block 17 , the power element 26 continues to provide power to the auxiliary wheel 25 .

In summary, the auxiliary power unit and the wheelchair of the present invention provide the auxiliary power to move the wheelchair by the movement of the wheelchair, and the rotating member of the auxiliary unit and the guiding unit are guided by the auxiliary unit. The setting of the joint, when turning or bumping the road surface, the rotating member will automatically move back to the center of the guiding portion, so that the wheelchair can continue to move linearly to provide automatic returning function when offset; When the turning angle is greater than the predetermined angle, the power component does not provide power to the auxiliary wheel, and therefore, the user can easily push each wheel body of the wheelchair to turn.

Although the present invention has been disclosed by the above-described preferred embodiments, it is not intended to limit the present invention, and it is still within the spirit and scope of the present invention to make various changes and modifications to the above embodiments. The technical scope of the protection is created, so the scope of protection of this creation is subject to the definition of the patent application scope attached.

1‧‧‧assembly unit

11‧‧‧Base

12‧‧‧ center axis

121‧‧‧First pivot hole

13‧‧‧ Connecting rod

14‧‧‧Connecting parts

15‧‧‧Flexible parts

16‧‧‧Guidance

17‧‧‧Limited blocks

18‧‧‧Micro Switch

2‧‧‧Auxiliary unit

21‧‧‧round frame

22‧‧‧Second pivot hole

23‧‧‧ pivotal parts

24‧‧‧Joint axis

25‧‧‧Assistance wheel

26‧‧‧Power components

27‧‧‧ tip hole

28‧‧‧ shaft

29‧‧‧Rotating parts

20‧‧‧Guide

A‧‧‧ frame

Claims (10)

An auxiliary power unit comprising: a set of connecting units having a base and a central shaft, wherein the central shaft is rotatable relative to the base, the connecting unit further has a guiding portion, the guiding portion is disposed on And an auxiliary unit having a wheel frame and an auxiliary wheel, the wheel frame being pivotally connected to the assembly unit, the wheel frame and the auxiliary wheel being pivotally connected by an engagement shaft, the auxiliary unit The utility model further has a rotating member, the rotating member abuts the guiding portion for guiding the auxiliary wheel. The auxiliary power unit of claim 1, wherein the central axis of the assembly unit has a first pivot hole, and the wheel frame of the auxiliary unit has a second pivot hole, the second pivot The first pivot hole of the connecting hole and the central shaft is combined by a pivoting member. The auxiliary power unit of claim 1, wherein the assembly unit further has at least one connecting rod, one end of the at least one connecting rod is movably connected to the base, and the at least one connecting rod is another One end is movably connected to a frame body, and is respectively pivotally connected by a plurality of connecting members. The auxiliary power unit of claim 3, wherein the number of the at least one connecting rod is two. The auxiliary power unit of claim 3, wherein the assembly unit further has at least one elastic member disposed between the at least one connecting rod and the frame. The auxiliary power unit of claim 1, wherein the guiding portion is disposed under the base, and the guiding portion extends from the center to both sides and forms a symmetrical slope. The auxiliary power unit of claim 1, wherein the assembly unit further has a limiting block and a micro switch, the limiting block is disposed on the top of the base, and the micro switch is disposed on the central axis And abuts the limit block. An auxiliary power unit according to claim 7, wherein the auxiliary wheel is internally disposed There is a power component that is electrically connected to the microswitch of the stacking unit. The auxiliary power unit of claim 2, wherein the rotating member is disposed on a shaft, the shaft is disposed in a guiding seat of the auxiliary unit, and the rotating member protrudes from the guiding seat . A wheelchair having an auxiliary power unit having the auxiliary power unit according to any one of claims 1 to 9.