TWI805208B - Anti-strut structure - Google Patents

Abstract

A reverse brace structure for a wheelchair, comprising a control mechanism and a reverse brace mechanism. The control mechanism includes an installation body which is installed on the wheelchair and defines the installation space, and a positioning unit which is located in the installation space and can be elastically reset and has a first positioning part. The anti-strut mechanism includes a anti-strut unit which is movably inserted into the installation body and has a second positioning portion, and an elastic member for the upward movement of the anti-strut unit. The positioning unit moves between a locked position and an active position. When in the locked position, the first positioning part is engaged with the second positioning part, and the anti-strut unit cannot move and is close to the ground. When in the active position, the first positioning part is disengaged from the second positioning part, and the anti-strut unit is moved up by the elastic force and away from the ground. The invention can conveniently move up the anti-stay, enhance the flexibility of using the wheelchair, and take safety into account.

Description

Anti-strut structure

The invention relates to a strut, in particular to a movable counter-strut structure for a wheelchair.

Referring to FIG. 1 , a general wheelchair 9 includes a seat body 91 and at least one counter brace 92 . The seat body 91 mainly includes a frame 911 , and two front wheels 912 and two rear wheels 913 respectively disposed on the front side and the rear side of the frame 911 . The anti-support rod 92 extends backward from the lower frame 911 of the seat main body 91 and extends downward after being turned, so that it can support the wheelchair 9 when the gravity is unstable and tilts backward. The wheelchair 9 will not topple over, avoiding the accident that the occupant (not shown) sitting on the wheelchair 9 falls to the ground, and increases the safety of the user using the wheelchair 9 .

However, since the anti-bracing rod 92 is integrally formed and fixedly arranged on the seat main body 91, when the wheelchair 9 needs to move from the road with a low height to the sidewalk with a relatively high height, it will be lifted At the moment when the front wheel 912 is lifted, the wheelchair 9 cannot be pushed through the rear wheel 913 because the anti-strut 92 hits the road ahead of time and gets stuck. Tilt back a larger angle for the support point. Therefore, the current wheelchair 9 still has room for improvement.

It is therefore an object of the present invention to provide a back brace structure which at least overcomes the disadvantages of the prior art.

Therefore, the anti-strut structure of the present invention is suitable for setting on a wheelchair, and includes a control mechanism and an anti-strut mechanism.

The control mechanism includes an installation body adapted to be installed on the rear side of the wheelchair and extending along a first direction and defining an installation space, and a positioning unit located in the installation space and elastically resettable, the positioning unit has a first A positioning department.

The counter-strut mechanism includes a counter-strut unit capable of moving along a second direction intersecting with the first direction and inserted into the mounting body, and a counter-strut unit connected to the counter-strut unit and providing the counter-strut unit The anti-strut unit has a second positioning portion for the elastic member with elastic force moving against the ground.

The positioning unit can move between a locking position and an active position relative to the mounting body. When in the locked position, the first positioning portion of the positioning unit is engaged with the second positioning portion of the anti-strut unit, so that the anti-strut unit cannot move along the second direction, and the anti-strut unit is adjacent to the ground . When in the active position, the first positioning part is disengaged from the second positioning part, so that the anti-strut unit is subjected to the elastic force of the elastic member to move along the second positioning part. Move up and away from the ground.

The effect of the present invention is that: by utilizing the design of the positioning unit and the anti-strut mechanism, the anti-strut can be easily moved up to the active position, and the flexibility of using the wheelchair can be improved, and at the same time, safety can be taken into account when the position is locked. .

10: Anti-strut structure

1: Control mechanism

11: Installation body

111: Install the base pipe

112: Installation space

113: middle casing

114: support face

12: Positioning unit

121: Positioning piece

122: fixed piece

123: Elastic parts

124: support part

125: The first positioning department

126: The first movement limit hole

13: Control parts

131: Pressing part

132: limit part

133: Promotion Department

134: The second movement limit hole

2: Anti-strut mechanism

21: Anti-strut unit

211: Reverse brace

212: cover

213: stem

214: Connection Department

215: Back support

216: The second positioning department

217: cover

218: inner surface

219: Around the Ministry

210: flexible space

22: Elastic parts

31: screw

32: Nut

33: screw

34: Nut

35: screw

36: Nut

81: wheelchair

82: Seat body

83: front wheel

84: rear wheel

86: Skeleton

T1: the first direction

T2: the second direction

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a side view, illustrating that the current wheelchair is provided with a reverse brace; Fig. 2 is a perspective view, illustrating the present invention An embodiment of the anti-strut structure is suitable for a wheelchair; Fig. 3 is a perspective view illustrating the anti-strut structure; Fig. 4 is an exploded perspective view illustrating the anti-strut structure; Fig. 5 is a sectional view illustrating the anti-strut structure; A counter-strut unit of the strut structure is in a locked position; and FIG. 6 is a view similar to FIG. 5, illustrating the counter-strut unit in an active position.

Referring to Fig. 2 and Fig. 3, one embodiment of the anti-strut structure 10 of the present invention is suitable for It is used to be arranged on the wheelchair 81 . The wheelchair 81 includes a seat body 82 , and two front wheels 83 and two rear wheels 84 respectively disposed on the front side and the rear side of the seat body 82 . The seat body 82 includes a plurality of frames 86 located at the bottom side of the seat body 82 and extending forward and backward. In this embodiment, two counter-bracing structures 10 are provided on the wheelchair 81 and installed on the rear end of the frame 86 respectively. Since the anti-strut structures 10 are the same, one of the anti-strut structures 10 will be described later.

In this embodiment, the wheelchair 81 is a general wheelchair, and in other variations, it can also be an electric wheelchair, as long as the bottom of the rear side of the wheelchair 81 is provided with an area for the installation of the anti-strut structure 10, and the The above-mentioned anti-brace structure 10 can also be one.

Referring to FIG. 3 to FIG. 5 , the anti-strut structure 10 includes a control mechanism 1 and an anti-strut mechanism 2 . The control mechanism 1 includes an installation body 11 fixedly inserted in the rear end of the frame 86 by a set of screw rods 31 and nuts 32 , a positioning unit 12 , and a control member 13 .

The installation body 11 has an installation base pipe 111 that is in the shape of a circular tube and extends forward and backward along a first direction T1 to define the installation space 112, and a top side of the outer peripheral surface of the installation base pipe 111 that is fixedly connected to the installation base. The pipe 111 communicates with the intermediate sleeve 113 . The intermediate sleeve 113 is also in the shape of a circular tube, extends along a second direction T2 intersecting with the first direction T1 , and has an upward supporting surface 114 located on its inner peripheral surface.

The positioning unit 12 is located in the installation space 112 and can be elastically reset, and includes a positioning unit that can move forward and backward relative to the installation base pipe 111 along the first direction T1. The positioning piece 121 of the installation space 112, a fixed plate 122 that is in the shape of a disc and is glued to the installation base pipe 111 and is located in the installation space 112 and is located at the front side of the positioning piece 121 at intervals, and a support on the positioning piece. The elastic member 123 between the member 121 and the fixing piece 122 . The positioning member 121 includes a cylindrical support portion 124 extending along the first direction T1 and supporting the elastic member 123 , and a first first protruding from the support portion 124 with a tapered width. Positioning part 125. The elastic member 123 is a compression spring, which has an elastic force to push the positioning member 121 backward. In particular, since the skeleton 86 passes through the installation base tube 111 and communicates with the installation space 112 in the first direction T1, the fixing piece 122 and the elastic member 123 of the positioning unit 12 can also be arranged in the skeleton 86 , as long as the elastic member 123 is located between the positioning member 121 and the fixing piece 122 and can provide the elastic force of the positioning member 121 to oppose the fixing piece 122 .

In this embodiment, the supporting portion 124 also has a first movement limiting hole 126 extending along the first direction T1 and penetrating through it horizontally, left and right, and is fixed on the installation base pipe by a set of screws 33 and nuts 34 111 so that the first movement limiting hole 126 can move relative to the screw rod 33 along the first direction T1 in the installation base pipe 111 , and the distance that the positioning member 121 can move is the length of the first movement limiting hole 126 . In other embodiments, the positioning member 121 can also have a limiting structure (not shown in the figure), such as a groove or a flange, and the installation base pipe 111 is also provided with a matching structure corresponding to the limiting structure ( (not shown in the figure), for example: a protrusion corresponding to a groove, or a sliding groove corresponding to a flange, so that the positioning member 121 can move in the installation base tube 111 along the first direction T1.

The control member 13 is located at the rear side of the positioning member 121 and can move in the first direction T1. It also includes a flat pressing portion 131 located behind the installation base pipe 111, a limiting portion 132 extending forward from the pressing portion 131 and extending into the installation space 112, and two left and right spaced apart from each other. The front end of the limiting portion 132 extends forward and is located at the pushing portion 133 of the installation space 112 . The limiting part 132 has a second movement limiting hole 134 penetrating and extending along the first direction T1, and is fixed on the installation base pipe 111 by a set of screw rods 35 and nuts 36 to limit the second movement. The hole 134 can move relative to the screw rod 35 along the first direction T1 to move inside the installation base pipe 111 , and the distance that the control member 13 can move is the length of the second movement limiting hole 134 . The pushing portion 133 is in the shape of a long sheet, and leans against the rear peripheral edge of the supporting portion 124 of the positioning member 121 . Thereby, when the control member 13 is forced to move forward, it can push the positioning member 121 to move forward. In this embodiment, the control member 13 moves forward to push the positioning member 121 to move forward. However, in practice, the control member 13 can also be a steel cable directly connected between the positioning member 121 and the seat body 82 of the wheelchair 81 to pull the positioning member 121 to move forward.

The counter-strut mechanism 2 includes a counter-strut unit 21 inserted into the installation body 11 to move up and down along the second direction T2 , and an elastic member 22 connected to the counter-strut unit 21 . The counter-strut unit 21 includes a counter-strut 211 extending along the second direction T2 , and a cover 212 covering the top side of the counter-strut 211 .

The counter strut 211 extends downward and rearward in the second direction T2, and is relatively It is located between the two pushing parts 133 of the control member 13 at intervals, and has a hollow rod part 213 that can move through the installation base pipe 111 and the intermediate sleeve 113, and a Located below the installation base pipe 111 and fixedly sleeved on the pole portion 213 and used to support the connecting portion 214 on the ground, a counter support portion 215 installed at the bottom end of the connecting portion 214, and a support portion 215 formed on the outer periphery of the pole portion 213 The second positioning part 216 on the front side. The top side of the rod portion 213 is radially spaced from the intermediate sleeve 113 to define a telescoping space 210 with a substantially annular cross-section. The cover 212 has a cover portion 217 connected to the top side of the anti-bracing rod 211 and has a downward inner surface 218, and a movable portion extending downward from the outer periphery of the cover portion 217 along the second direction T2. The surrounding portion 219 of the intermediate sleeve 113 is sheathed. In this embodiment, the first positioning portion 125 of the positioning member 121 is a tongue extending backward, and the second positioning portion 216 is a locking hole, which can be locked with the first positioning portion 125 .

The elastic member 22 is sheathed on the counter-bracing rod 211 and located in the telescoping space 210 , and its two ends respectively abut against the supporting surface 114 and the inner surface 218 . The elastic member 22 provides elastic force for the anti-bracing unit 21 to move upward against the ground.

Referring to FIG. 2 , FIG. 5 and FIG. 6 , the positioning unit 12 can move between a locking position (as in FIG. 5 ) and an active position (as in FIG. 6 ) relative to the mounting body 11 . When in the locked position, the first positioning portion 125 of the positioning member 121 is engaged with the second positioning portion 216 of the counter brace 211, so that the counter brace unit 21 cannot move along the second direction T2, and the counter brace unit 21 cannot move along the second direction T2, and the counter brace unit 21 The pole 211 is adjacent to the ground. In the active position, the first positioning part 125 is disengaged from the second positioning part 216, and the anti-bracing rod unit 21 is moved up and away from the ground along the second direction T2 by the upward elastic force of the elastic member 22. At the same time, the top side of the connecting part 214 supports On the bottom side of the installation base pipe 111 , the anti-bracing unit 21 is limited from moving up.

In this embodiment, the back support portion 215 is, for example but not limited to, a set of rollers. In other variations of this embodiment, the back support portion 215 can also be a single piece, as long as it can be in the locked position, so that This wheelchair 81 does not need to fall backwards.

Referring to FIG. 2 and FIG. 5 , during normal use, the anti-bracing unit 21 is located at this locked position because it is necessary to ensure that the wheelchair 81 will not fall backward due to an unstable center of gravity. At this time, the first positioning part 125 is snapped into the second positioning part 216, and the back support part 215 is adjacent to the ground, and can support the ground first when the wheelchair 81 is tilted backwards, so as to prevent the wheelchair 81 from continuing to turn backwards and topple over. .

Referring to Fig. 2 and Fig. 6, when this wheelchair 81 needs to move from a lower ground (for example: road) to higher ground (for example: sidewalk), a user (not shown) first along the first Press the control member 13 forward in the direction T1 , so that the control member 13 pushes the positioning member 121 forward to disengage from the second positioning portion 216 . Thereby, the counter-stay 211 is automatically moved up to the active position where the counter-stay 211 is away from the ground by the elastic force of the elastic member 22 , and the counter-stay 215 is located radially inside the rear wheel 84 . Thereby, when the wheelchair 81 turns with the rear wheel 84 as a supporting point, the anti-bracing unit 21 will not touch the ground. Therefore, the wheelchair 81 is difficult to be limited by the anti-stay 211 and can only rotate a small angle, and can Smoothly take the wheelchair 81 rear wheels as the supporting point, turn the wheelchair 81 backwards to step on the higher ground to its front wheels 83, and then continue to push forward until the whole wheelchair 81 moves to the higher ground.

Then, the user steps down on the anti-strut unit 21 from the top surface of the cover 212, so that the anti-strut unit 21 is forced to move down until the second positioning part 216 is locked in the first position again. 125, the anti-strut unit 21 can move back to the locked position.

Since the anti-strut unit 21 can be controlled to move up and down between the locked position and the active position. When the wheelchair 81 needs to be kept stable, the anti-strut unit 21 moves to the locking position; when the wheelchair 81 needs to be controlled to rotate backward, the anti-strut unit 21 moves to the active position. Therefore, the anti-strut structure 10 can take into account the safety of the wheelchair 81 and the flexibility of movement, which is very practical and convenient. And it is worth mentioning that, during use, the user who pushes the wheelchair at the rear side can directly press the control member 13 forward with his feet, so that the counter-stay 211 will automatically move up and away from the ground, or he can directly step on the control member 13 with his feet. The top surface of the cover 212 makes the anti-brake unit 21 move down and the anti-bracing portion 215 is adjacent to the ground. During use, there is no need to bend over to operate the anti-bracing structure by hand, and the operation is quite convenient.

In summary, the anti-strut structure 10 of the present invention, by utilizing the overall design of the anti-strut mechanism 2 and the control mechanism 1, can automatically move the anti-strut unit 21 away from the The active position of the ground can also make the anti-strut 211 move down until the positioning when the user utilizes the sole of the foot to step on the top side of the anti-strut unit 21. The first positioning portion 125 of the component 121 is automatically snapped back to the second positioning portion 216 to return to the locking position. In addition to being easy to operate, the wheelchair 81 equipped with the anti-strut structure 10 can also improve the current shortcomings: not only can the wheelchair 81 be kept stable and not topple backwards, but it can also be rotated backwards at a large angle when needed. Therefore, the wheelchair 81 can easily move on road surfaces of various heights, which is very convenient. Therefore really can reach the purpose of the present invention.

But what is described above is only an embodiment of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

10: Anti-strut structure

1: Control mechanism

11: Installation body

111: Install the base pipe

112: Installation space

113: middle casing

114: support face

12: Positioning unit

121: Positioning piece

122: fixed piece

123: Elastic parts

124: support part

125: The first positioning department

126: The first movement limit hole

13: Control parts

131: Pressing part

132: limit part

133: Promotion Department

134: The second movement limit hole

2: Anti-strut mechanism

21: Anti-strut unit

211: Reverse brace

212: cover

213: stem

214: Connection Department

215: Back support

216: The second positioning department

217: cover

218: inner surface

219: Around the Ministry

210: flexible space

22: Elastic parts

31: screw

33: screw

35: screw

36: Nut

86: Skeleton

T1: the first direction

T2: the second direction

Claims (10)

A reverse brace structure is suitable for being arranged on a wheelchair, and includes: a control mechanism, including an installation body suitable for being installed on the rear side of the wheelchair and extending along a first direction and defining an installation space; The installation space is elastically resettable positioning unit, the positioning unit has a first positioning part; The anti-strut unit of the body, and an elastic member connected to the anti-strut unit and providing the elastic force of the anti-strut unit to move against the ground, the anti-strut unit has a second positioning part, wherein, The positioning unit can move between a locking position and an active position relative to the mounting body. In the locking position, the first positioning portion of the positioning unit is engaged with the second positioning portion of the counter-bracing unit, so that The anti-strut unit cannot move along the second direction, and the anti-strut unit is close to the ground. When in the active position, the first positioning part is separated from the second positioning part, so that the anti-strut unit is subjected to the elastic force The elastic force of the member moves upward in the second direction away from the ground. The anti-bracing structure according to claim 1, wherein the control mechanism further includes a control member mounted on the installation body, the control member can be operated to move along the first direction, and is used to push the positioning unit in the The first direction moves. The anti-brace structure according to claim 2, wherein the control part of the control mechanism has a pressing part located outside the installation body, and at least one part connected to the pressing part and located in the installation space of the installation body promotion department, The at least one pushing part leans against the positioning unit. The anti-brace structure according to claim 3, wherein the positioning unit includes a positioning member which is located in the installation space and is movable relative to the installation body along the first direction, and a positioning member which is fixedly arranged in the installation space and is connected to the installation space. A fixed piece spaced apart from the positioning piece, and an elastic piece propped between the positioning piece and the fixed piece, the positioning piece has the first positioning portion, and the elastic piece has a constant direction from the positioning piece to the counter support rod The spring force of the unit push. The anti-bracing rod structure as claimed in claim 4, wherein the control member has two push parts spaced apart from each other, the positioning member is located between the control member and the elastic member, and includes a support on the elastic member. The supporting part of the component, and the first positioning part extending from the supporting part to the anti-bracing rod unit and capable of being locked in the second positioning part. The counter brace structure according to claim 1 or 5, wherein the second positioning portion is a locking hole into which the first positioning portion can extend. The counter-strut structure as claimed in claim 1, wherein the counter-strut unit includes a counter-strut inserted into the mounting body capable of moving along the second direction, and a fixed cover arranged on the counter-strut For the top cover, the counter-bracing rod extends downward and backward in the second direction, and the elastic member is sleeved on the counter-supporting rod and resists between the installation body and the cover. The anti-bracing structure according to claim 7, wherein the installation body has an installation base pipe extending along the first direction and defining the installation space, and an outer peripheral surface fixedly connected to the installation base pipe and extending along the The intermediate sleeve extending in the second direction, the anti-bracing rod is movably passed through the installation base pipe and the intermediate sleeve, and is radially spaced from the intermediate sleeve to define a spring for the elastic force The telescopic space provided by the cover part has a cover part connected to the top side of the counter strut, and a cover part extending from the outer peripheral edge of the cover part along the second direction and sleeved on the cover part so as to be movable along the second direction. Surrounding part of the middle casing. The anti-strut structure as claimed in claim 7, wherein the installation body has an installation base pipe extending along the first direction and defining the installation space, and the anti-strut of the anti-strut unit also has a movable ground inserted into the rod of the mounting body, a connecting part located below the mounting body and fixedly connected to the bottom side of the rod, and a counter-supporting part connected to the bottom of the connecting part and used to brace against the ground , when in the active position, the connecting portion abuts against the bottom side of the installation base pipe, so as to limit the counter-bracing rod from moving upward. The anti-strut structure according to claim 3, wherein the control member has two pushing parts respectively connected to the pressing part, the anti-strut unit extends in the second direction and is located at intervals Between the above-mentioned push parts.

Images