TW201440749A - Size-adjustable wheelchair - Google Patents

Abstract

A size-adjustable wheelchair comprises a chassis, a seat cushion set connected with the chassis, and a back seat set connected with the seat cushion set. The chassis is provided with a lifting mechanism connected to the seat cushion set for activation. The lifting mechanism is pivotally connected with a screw rod. When a screw tube screwed with the screw rod is rotated, the screw rod drives the lifting mechanism to move, such that the lifting mechanism activates the seat cushion set to allow displacement and height adjustment, and activates the back seat set to allow displacement and adjustment. The lifting mechanism activates the chassis to provide a rear wheel displacement adjustment and a front wheel spacing distance. The wheelchair of this invention uses a single screw rod to simultaneously activate various components of the wheelchair so as to allow adjustment to a size suitable for sitters.

Description

Resizable wheelchair

This creation is about a resizable wheelchair, especially a wheelchair that provides a patient with muscle atrophy or cerebellar atrophy and can fix his body.

Patients with muscle atrophy, cerebellar atrophy, or cerebral palsy often cannot control their limbs according to their own will, so the wheelchair used to provide these patients needs to provide a function to fix their limbs, further preventing the patient from tipping over because of physical movements. The problem. Since the wheelchair assisting device needs to provide the function of fixing the occupant's limb, the wheelchair assisting device needs to have different sizes according to the user's body shape, so some commercially available wheelchair assisting devices include the function of resizing, which can be adjusted in size. Wheelchair assists can usually adjust the height of the seat cushion from the ground separately and adjust the position of the back and forth of the seat back separately.

The traditional wheelchair assisted resizing design works independently for each part that needs to be adjusted. Therefore, it takes a lot of time to adjust the wheelchair accessory to the size suitable for the occupant, and the adjustment method is not convenient enough. Moreover, the resilience of the wheelchair assisted device increases with the size of the occupant, but the distance between the front and rear wheels of the wheelchair cannot be changed, and thus the wheelchair may be caused by the larger size of the occupant. The accessory is easier to tip over.

In order to solve these problems, the present invention provides a resizable wheelchair comprising a first bracket including two extending tubes spaced along a first axis, each extending tube including a first section perpendicular to the first axis a second axially spaced apart front end and a rear end, the first bracket further comprising two rail rods spaced between the two extension tubes and spaced along the first axis, and a crossbar extending between the ends of the rail rods The other ends of the rail rods are respectively fixed to an extension tube. Each rail rod includes a first rail and a pivot hole. The pivot holes are located between the first rail and the cross rail along the second axial direction. Forming a pivoting lug and two front wheels respectively pivotally connected to the front end of the extension tube, and a second bracket a connecting pipe, and two legs and two sockets extending from the outer circumferential surface of the connecting pipe, the two legs are located between the two sockets along the first axial direction, and the first legs of the second bracket and the first one of the first bracket The rails are combined to slide relative to each other, and the sleeves and the extension tubes are sleeved to be relatively slidable, and the two rear wheels are pivotally disposed on the two outer sides of the second bracket and move along the second axial direction together, two first poles, each The utility model comprises a top end and a bottom end, wherein the bottom end of each first rod is combined with the first rail of each rail rod to be relatively slidable, and is fixed to a connecting rod between the bottom ends of the two first rods, and is connected The rod includes a lug formed on the outer peripheral surface, and two second rods each including an upper end and a lower end, wherein the lower ends of the second rods are pivotally disposed at the pivot holes of the rail rods, and the upper and lower ends of the second rods Between the top and bottom of the first rod, a pivoting member is pivotally connected to the pivoting ear of the first bracket, a screw tube is pivotally connected to the pivoting member, and a screw, including the connecting rod a pivoting end of the lug is pivoted, the screw is screwed to the screw, and when the solenoid is rotated, the screw is connected to the connecting rod along the second Displacement toward a rear end of each of the extension tubes away from or adjacent to the first bracket, causing the top end of each of the first rods and the upper end of each of the second rods to approach or move away from a third axial direction perpendicular to the first and second axial directions Each rail rod is displaced by a two-track tube pivotally connected to the first rod, and each of the rail tubes includes a first sleeve end and a second sleeve end, and each track tube further comprises a second sleeve formed on the outer peripheral surface and located at the second sleeve a first pivoting end of the end, the first pivoting ears of each of the rail tubes are respectively pivotally connected to the top end of the first rod, and the lower frame is combined with the first and second rods, and the lower frame includes two first sections spaced along the first axis The second rail and the two ends, the lower frame further includes an upper end surface, each end being pivotally connected to the top end of the second rod, each rail tube is coupled to the upper end surface of the lower frame, and a linkage rod passes through each of the second frame The rail and the upper end of each of the second rods cause the upper ends of the second rods to be coupled with the second rail and are displaced in the second axial direction toward or away from the top end of each of the first rods, and a mounting plate includes an upper surface and a lower surface. The lower surface of the erecting plate is fixed to each rail tube, one , in combination with the erecting plate and above the upper surface, a foot bracket is combined with the first socket end of each rail tube, a foot pedal is combined with the foot bracket, and a tube bracket is sleeved with each rail tube While sliding relative to each other, the seat tube bracket includes a main rod, and the two first extension arm seat tube brackets formed on the outer circumferential surface of the main rod further include a first pivot portion formed on the main rod, and each of the first seat tube brackets The extension arm is movable relative to the second socket end of each of the rail tubes, and the two links each include a joint end pivotally connected to the first pivot portion of the seat tube bracket, and an engaging end coupled with the linkage rod a seat back bracket that moves together with the seat tube bracket, the seat back bracket includes two longitudinal rods spaced along the first axial direction, each longitudinal rod includes an upper end and a lower end, and the lower end of each longitudinal rod and the seat tube bracket Combine and move together, one The back cushion of the chair moves together with the seat back bracket.

When the rotating screw causes the top end of each of the first rods and the upper end of each of the second rods to be displaced toward the respective rail rods along the third axial direction, the second bracket is displaced along the second axial direction toward the front end of each of the extension tubes, and the linkage rod is pushed The connecting rod and the seat tube bracket cause the seat back bracket to be displaced along the second axial direction toward the front end of each extension tube together with the seat back cushion, and the erecting plate seat foot support foot pedal seat tube bracket and the connecting rod are adjacent to each other The displacement of the rail rod causes the distance between each front wheel to be spaced apart from the rear wheel in the second axial direction, and the height of the seat cushion from the ground is reduced.

When the rotating screw causes the top end of the first rod and the upper end of each second rod to be displaced away from each of the rail rods in the third axial direction, the second bracket is displaced along the second axial direction away from the front end of each of the extending tubes, each of the second rods The upper end linkage link pushes the seat tube bracket to cause the seat back bracket to be displaced along the second axial direction away from the front end of each extension tube together with the seat back cushion, and the erecting plate, the seat cushion, the foot bracket, the foot pedal, the seat tube The bracket and the connecting rod are displaced away from the rail rods along the third axial direction, so that the distance separating the front wheels from the respective rear wheels along the second axial direction increases, and the height of the seat cushion from the ground increases.

The created wheelchair can use the rotating screw to synchronously and quickly adjust the distance between the front and rear wheels, the height of the seat cushion from the ground, the distance between the two first clamping pads, and the back cushion of the seat back from the front gear. The distance can be adjusted to meet the needs of users of different body types, or as the user's age and body size increase, and the distance between the front and rear wheels increases when the wheelchair size is adjusted, making the wheelchair more stable and not easy to fall over. .

10‧‧‧ Wheelchair

20‧‧‧Chassis

22‧‧‧First bracket

24‧‧‧ Extension tube

26‧‧‧ front end

28‧‧‧ Backend

30‧‧‧ Connecting rod

32‧‧‧ Track Rod

34‧‧‧First track

35‧‧‧ pivot hole

36‧‧‧crossbar

38‧‧‧ pivoting ears

40‧‧‧front wheel

42‧‧‧second bracket

44‧‧‧Connecting tube

46‧‧‧ Sockets

48‧‧‧ feet

50‧‧‧round frame

52‧‧‧ Rear wheel

56‧‧‧first shot

58‧‧‧Top

60‧‧‧ bottom

62‧‧‧ Connecting rod

64‧‧‧ lugs

66‧‧‧second shot

68‧‧‧Upper

70‧‧‧Bottom

72‧‧‧ screw

74‧‧‧ pivot end

76‧‧‧ pivotal parts

78‧‧‧Solenoid

80‧‧‧ drive parts

82‧‧‧Cushion set

84‧‧‧Equipped board

86‧‧‧ upper surface

88‧‧‧lower surface

90‧‧‧ Track tube

92‧‧‧First set of joints

94‧‧‧Second set of connectors

95‧‧‧Locking parts

96‧‧‧ Lower frame

End of 97‧‧‧

98‧‧‧second track

99‧‧‧ upper end

101‧‧‧ third track

102‧‧‧ first pivot

103‧‧‧ linkage rod

104‧‧‧Second pivot

105‧‧‧Fixed rod

107‧‧‧foot bracket

109‧‧‧Horizontal section

111‧‧‧ longitudinal section

113‧‧‧ pedals

115‧‧‧Combination Department

117‧‧‧Seat tube bracket

118‧‧‧ main pole

119‧‧‧First extension arm

131‧‧‧Second extension arm

133‧‧‧ first pivot

135‧‧‧ Second pivot

136‧‧‧ Connecting rod

137‧‧‧Binding end

139‧‧‧Card end

151‧‧‧Support

153‧‧‧ first end

155‧‧‧ Telescopic rod

157‧‧‧ second end

159‧‧‧ expansion board

171‧‧‧ fourth track

173‧‧ long slot

175‧‧‧Fixed parts

177‧‧‧ screw joints

179‧‧‧First Clamp

191‧‧‧ bracket

193‧‧‧Joint film

194‧‧‧ front gear

195‧‧‧ seat cushion

196‧‧‧disc nuts

197‧‧‧Back Chair Set

199‧‧‧Setting board

211‧‧‧ front surface

213‧‧‧Back surface

215‧‧‧ fifth track

217‧‧‧ Sockets

219‧‧‧ head pillow

231‧‧‧ Adjusting rod

233‧‧‧back seat bracket

235‧‧‧ longitudinal rod

237‧‧‧ upper end

239‧‧‧Bottom

251‧‧‧intermediate pole

253‧‧‧ pivoting convex

255‧‧‧Hand putter

257‧‧‧ pull

259‧‧‧Handrail

271‧‧‧Frame

273‧‧‧Second clamping pad

275‧‧‧ bracket

277‧‧‧Joint film

279‧‧‧Backrest cushion

291‧‧‧Spring Cylinder

292‧‧‧Action rod

293‧‧‧First pivotal

295‧‧‧Second pivotal

The first figure is a three-dimensional combination diagram of the creation of the wheelchair display to the minimum size.

Figure 2 is an exploded perspective view of the creation of the wheelchair.

Figure 3 is an exploded perspective view of the chassis of the creation wheelchair.

Figure 4 is an exploded perspective view of the seat cushion set of the creation wheelchair.

Figure 5 is an exploded perspective view of the chair back set of the creation wheelchair.

Figure 6 is a cross-sectional view taken along line 6-6 of Figure 1.

Figure 7 is a plan view of Figure 1.

Figure 8 is a cross-sectional view taken along line 8-8 of Figure 6.

Fig. 9 is a perspective view showing a state in which the size of the wheelchair is enlarged by rotating the solenoid in the state of Fig. 1.

Figure 10 is a cross-sectional view taken along line 10-10 of Figure 9.

Figure 11 is a plan view of Figure 10.

Fig. 12 is a view showing a state in which the seat back group is tilted in the state of Fig. 6.

Fig. 13 is a state diagram in which the seat cushion group and the seat back group are tilted simultaneously in the state of Fig. 6.

Fig. 14 is a state diagram in which the tilting of the seat back group is further adjusted in the state of Fig. 13.

All of the following drawings are merely illustrative of the basic teachings of the present invention, and the extension of the number, position, relationship, and size of the components constituting the preferred embodiment will be explained in the drawings. Post-guided changes are implemented in industry skills. In addition, changes in the exact dimensions and size ratios associated with specific strengths, weights, strengths, and similar requirements are also within the skill of the industry after reading and understanding the teachings of this creation.

In the different figures, the same reference numerals are used to designate the same or similar elements; in addition, please refer to the text such as "first", "second", "third", "upper", "lower", "before", "after" "," "inside", "outside", "end", "part", "segment", "horizontal", "vertical", "inward", "outward", "twist", "length"," The "area", "around", "side", "radial", "axial", and the like, are merely for ease of use in the drawings and are merely used to help describe the present invention.

The wheelchair 10 of the present invention includes a chassis 20 including a first bracket 22 and a second bracket 42 that are slidably coupled to each other, wherein the first bracket 22 includes a space along a first axis X. The two extension tubes 24 are open, and each extension tube 24 includes a front end 26 and a rear end 28 spaced apart along a second axial direction Y perpendicular to the first axial direction X. The first bracket 22 further includes two extension tubes 24 Two rails 32 spaced apart along the first axial direction X, and a crossbar 36 extending between the ends of the rail rods 32, the other ends of the rail rods 32 are respectively fixed to an extension tube 24, Each of the rails 32 includes a first rail 34 and a pivot hole 35. The pivot holes 35 are located between the first rails 34 and the crossbars 36 along the second axial direction Y. Two pivoting ears 38 are formed on the rails 36. A connecting rod 30 is located below each of the rail rods 32 and extends between the two extension tubes 24 in a third axial direction Z perpendicular to the first and second axial directions X, Y. The coupling rod 30 is located along the second axial direction Y. The front end 26 of each extension tube 24 and the crossbar 36 Used to support each track bar 32. A front wheel 40 is pivoted to the front end 26 of each of the extension tubes 24 of the first bracket 22.

The second bracket 42 includes a connecting tube 44, and two legs 48 and two sockets 46 extending from the outer peripheral surface of the connecting tube 44. The two legs 48 are located between the two sockets 46 along the first axial direction X. The second bracket 42 Further, a wheel frame 50 fixed to each of the sockets 46 is disposed, and a rear wheel 52 is pivoted on an outer side surface of each of the wheel frames 50. The rear end 28 of each of the extension tubes 24 of the first bracket 22 is respectively sleeved with the sleeve tube 46 of the second bracket 42 so as to be relatively slidable. The two rail rods 32 are located between the two legs 48 along the first axial direction X. The screws respectively pass through the ends of the legs 48 and the first rails 34, so that the legs 48 are slidable relative to the respective first rails 34, so that the second brackets 42 can extend in the second axial direction Y relative to the first brackets 22 The front end 26 of the tube 24 is displaced away or in close proximity to adjust the distance separating each of the rear wheels 52 from the front wheel 40.

The chassis 20 according to the drawings further includes two first rods 56 and two second rods 66 pivoted together, each of the first rods 56 including a top end 58 and a bottom end 60, passing through the respective branches of the second bracket 42 The ends of the legs 48 and the first brackets 22 of the first rails 34 further pass through the bottom ends 60 of the first rods 56, causing the bottom ends 60 of the first rods 56 to engage the first rails 34 of the rail rods 32. The first bracket 22 is slid together with the second bracket 42. Each of the second rods 66 includes an upper end 68 and a lower end 70. The lower ends 70 of the second rods 66 are respectively pivotally connected to the pivot holes 35 of the first brackets 22, and the upper and lower ends 68 and 70 of the second rods 66 are respectively separated. The pivotal connection with the top and bottom 58 and 60 of the first rod 56 causes each of the first rods 56 to be combined with the second rod 66 to be X-shaped. When the bottom end 60 of each of the first rods 56 is displaced along the second axial direction Y, the top end 58 of each of the first rods 56 and the upper end 68 of each of the second rods 66 are spaced apart from or adjacent to the first bracket 22 along the third axial direction Z. Each track bar 32.

The chassis 20 according to the drawings further includes a connecting rod 62 fixed between the bottom ends 60 of the first rods 56. The connecting rod 62 includes two lugs 64 formed on the outer peripheral surface. According to the drawings, the chassis 20 further includes a screw 72, a pivoting member 76 and a screw 78. The screw 72 includes a pivoting end 74 pivotally connected to the lug 64 of the connecting rod 62. The member 76 is pivotally disposed between the two pivoting ears 38 of the first bracket 22, and a driving member 80 such as a crank is disposed at the end of the screw 78. The screw 78 is pivotally connected to the pivoting member 76 and screwed to the screw 72. A pin is arranged on the screw 78 and located in front of the end of the pivoting member 76 to prevent the screw When the tube 78 rotates, it moves along the longitudinal axis of the screw 72 relative to the pivoting member 76, so that when the driving member 80 rotates the solenoid 78, only the screw 72 will displace along the longitudinal axis of the screw 72 and push the connecting rod 62 and The bottom end 60 of each of the first rods 56 is displaced in the second axial direction Y over a length of each of the first rails 34 of the first bracket 22 along the second axial direction Y.

The wheelchair 10 of the present invention further includes a pad set 82 including a two track tube 90 pivotally coupled to the first rod 56, respectively, and a second pivot 104 of the mounting plate 84 along the first axis The X is located between the two rail tubes 90. Each of the rail tubes 90 includes a first sleeve end 92 and a second sleeve end 94. Each rail tube 90 further includes a second sleeve end 94 formed on the outer peripheral surface. A first pivoting arm 102 is provided with a locking member 95 adjacent to the first socket end 92. A fixed rod 105 is pivotally coupled to the top end 58 of each of the first rods 56 through the first pivoting ears 102 of each of the rail tubes 90 such that each rail tube 90 is pivotable relative to each of the first rods 56.

The seat cushion set 82 according to the drawings further includes a U-shaped lower frame 96 including two second rails 98 spaced apart along the first axial direction X and two ends 97, the lower frame 96 further including the respective rails An upper end surface 99 of the outer peripheral surface of the tube 90 is matched. The fixing rods 105 pass through the respective ends 97 of the lower frame 96, so that the respective ends 97 of the lower frame 96 are pivotally connected to the top ends 58 of the second rods 66 through the fixing rods 105, and a linkage rod 103 passes through each of the lower frames 96. The two rails 98 and the upper ends 68 of the second rods 66 cause the linkage rod 103 to move with the upper end 68 of each of the second rods 66 in the second axial direction Y away from or near the top end 58 of each of the first rods 56, thus the lower frame 96 is displaced in a direction parallel to or away from each of the rail rods 32 in the third axial direction Z substantially parallel to the rail rods 32 of the first bracket 22, and the rail tubes 90 can be rotationally and separately coupled according to the fixed rods 105. On the upper end surface 99 of the lower frame 96.

The seat cushion set 82 according to the drawings further includes a mounting plate 84 including an upper surface 86 and a lower surface 88, and two third rails 101 extending from the upper surface 86 to the lower surface 88, two third tracks 101 is located between the two rail tubes 90 along the first axial direction X. The lower surface 88 of the erection plate 84 is fixed to each of the rail tubes 90, causing the erecting plates 84 to be displaced along with the respective rail tubes 90.

The seat cushion set 82 according to the drawings also includes a symmetrical two expansion plate 159, each The expansion board 159 includes two fourth rails 171 and one long slot 173, and one end of each of the fourth rails 171 of each expansion panel 159 faces one side thereof, causing each fourth rail 171 to exhibit a tilt non-parallel to the second axial direction Y. shape. Each expansion plate 159 is slidably disposed on the upper surface 86 of the mounting plate 84, and the adjacent two fourth tracks 171 of the two expansion plates 159 are arranged in a V shape (as shown in FIG. 7), and the second plate of the mounting plate 84 The three rails 101 are respectively located under the fourth rails 171 of each of the expansion boards 159 (as shown in FIG. 7), and a fixing member 175 is disposed at a position of the lower surface 88 of the board 84 and aligned with the third rails 101. The screwing members 177 are respectively disposed in the fourth rails 171 of each of the expansion boards 159 and are respectively locked with the fixing members 175, so that when the fixing members 175 are along the second axial direction Y within the range of the third rails 101 When sliding, each of the screw members 177 interlocks the displacement plates 159 in the first axial direction X away from each other (as shown in FIG. 11) or close to (as shown in FIG. 7).

The seat cushion group 82 further includes two brackets 191 slidably coupled to the respective expansion plates 159, and two first clamping pads 179 respectively fixed on the bracket 191, wherein each bracket 191 includes a coupling piece. 193, the bonding pieces 193 of the brackets 191 are respectively abutted against the surface of each of the expansion boards 159 and aligned with the long slots 173, and the brackets 191 are respectively locked to the expansion boards 159 by screws and the disc nuts 196, thereby causing Each of the first clamping pads 179 is displaced along with the expansion plate 159. In addition, when the butterfly nuts 196 are relaxed, the brackets 191 and the first clamping pads 179 can be displaced relative to the expansion plates 159 in the range of the long grooves 173 along the second axial direction Y, and the combination of the brackets 191 The sheet 193 is also provided with a long groove (as shown in FIG. 4), so that each of the brackets 191 and each of the first clamping pads 179 can be displaced X in the first axial direction with respect to each of the expansion plates 159. Similarly, each of the disk nuts 196 After tightening, each of the first clamping pads 179 is positioned so as not to be displaced relative to each of the expansion plates 159 along the first or second axial directions X, Y.

The seat cushion set 82 according to the drawings further includes a mat 195 coupled to each of the expansion boards 159, and a front end 194 coupled to the mounting plate 84, wherein the seat cushion 195 is located at the first position along the first axial direction X. Between the clamping pads 179, the front bumps 194 are located in front of the seat cushions 195. The seat cushion 195 is used to support the user's buttocks, and the two first clamping pads 179 are used to be clamped on the two sides of the user's buttocks to prevent the user's buttocks from being displaced along the first axial direction X. 194 is used to prevent the user from moving forward along the second axial direction Y, and thus the user The buttocks can be secured to the seat cushion 195.

The seat cushion set 82 according to the drawings includes a foot support 107 and one foot The pedal 113 includes a lateral section 109 and a longitudinal section 111, and a rear end of the footrest 113 is fixed to a joint portion 115. The joint portion 115 of the foot board 113 is coupled with the longitudinal section 111 of the foot bracket 107 and is located between the two front wheels 40 along the first axial direction X. When the joint portion 115 of the foot board 113 is clamped, the foot pedal 113 cannot be Displacement along the third axial direction Z, when the joint 115 is relaxed, the footrest 113 is adjusted in position along the third axial direction Z, in addition to the transverse section 109 of the foot support 107 and the first sleeve end 92 of each track tube 90 Slidably coupled, when the locking member 95 is tightened, the foot bracket 107 and the foot pedal 113 cannot be displaced along the second axial direction Y. When the locking member 95 is relaxed, the foot bracket 107 and the foot pedal 113 are Displaced along the second axial direction Y.

The seat cushion set 82 according to the drawings further includes a tube bracket 117 which is sleeved with each of the rail tubes 90 so as to be relatively slidable. The seat tube bracket 117 includes a main rod 118 and two first portions formed on the outer circumferential surface of the main rod 118. The extension arm 119 and the second extension arm 131 are disposed, and the two first extension arms 119 are located between the second extension arms 131 along the first axial direction X. The seat tube bracket 117 further includes two firsts formed on the main rod 118. The pivot portion 133 and a second pivot portion 135 are located between the two first pivot portions 133. Each of the first extension arms 119 of the seat tube bracket 117 is coupled to the second sleeve end 94 of each of the rail tubes 90 to be relatively movable in the second axial direction Y.

The seat cushion set 82 according to the drawings further includes two connecting rods 136, each of which includes a joint end 137 pivotally connected to the first pivot portion 133 of the seat tube bracket 117, and an engaging end having a U-shaped groove. 139. Each of the fixing members 175 is fixed to one side of the connecting rod 136 and moves together, and the engaging end 139 of each connecting rod 136 is detachably pivotally connected with the connecting rod 103, so that the engaging end 139 of each connecting rod 136 is transmitted. The linkage rod 103 is indirectly pivoted to the upper end 68 of each of the second rods 66, and the engaging end 139 of each link 136 can be rotated away from the linkage rod 103 (as shown in Figures 12 and 13).

The seat cushion set 82 further includes a support member 151 according to the drawings. The support member 151 includes a telescopic rod 155. The support member 151 further includes a first end 153 away from the telescopic rod 155, and is located at the end of the telescopic rod 155. And the seat tube bracket 11 A second end 157 pivotally connected to the second pivot portion 135 of the seventh pivot portion 135.

The seat cushion set 82 according to the drawings further includes a spring cylinder 291 including an actuating lever 292 mounted on the cylinder and movable, the spring cylinder 291 further including a first end formed at one end of the actuating lever 292 A pivoting portion 293 and a second pivoting portion 295 formed in the cylinder block. The first pivoting portion 293 of the spring cylinder 291 is pivotally connected to the second pivoting arm 104 of the mounting plate 84, and the second pivoting portion 295 is pivotally connected to the linkage rod 103, and the other pulling handle 257 of the seat back group 197 is controlled by the steel cable. The spring cylinder 291 relaxes or fixes the actuating lever 292. When the spring cylinder 291 relaxes the actuating lever 292, the mounting plate 84 can be rotated about the fixed rod 105 to further form a state that is not parallel to the rail rods 32 of the first bracket 22 (as shown in FIGS. 13 and 14). When the spring cylinder 291 fixes the actuating lever 292, the mounting plate 84 is pulled by the actuating lever 292 and cannot pivot with the fixed lever 105 as the axis.

The wheelchair 10 of the present invention, according to the drawings, further includes a seat back set 197 including a seat back bracket 233 that moves together with the seat tube bracket 117, the seat back bracket 233 includes a first axial direction X The two longitudinal rods 235 are spaced apart, and an intermediate rod 251 extending between the two longitudinal rods 235. Each longitudinal rod 235 includes an upper end 237 and a lower end 239. The intermediate rod 251 includes a pivoting protrusion 253 formed on the surface. The seat back bracket 233 further includes an L-shaped hand push rod 255 formed on the outer side of each longitudinal rod 235, and a pull handle 257 is fixed on each of the hand push rods 255. The lower end 239 of each longitudinal rod 235 is pivotally connected to each second extension arm 131 of the seat tube bracket 117 and moves together along the second axial direction Y. The first end 153 of the support member 151 and the pivoting convex portion 253 of the seat back bracket 233 Pivot. The extension or contraction of the telescopic rod 155 of the support member 151 causes the seat back bracket 233 to rotate relative to the seat tube bracket 117. One of the pull handles 257 is coupled to the support member 151 by a steel cable, and the pull handle 257 is linked to the support member 151 to loosen the telescopic rod 155, thereby adjusting the extension or contraction of the telescopic rod 155 of the support member 151.

The seat back set 197 according to the drawings further includes a setting plate 199 including a front surface 211 and a rear surface 213, and the setting plate 199 further includes a set of joints 217 formed on the rear surface 213, further comprising The front surface 211 extends to the second fifth track 215 of the rear surface 213, and the second fifth track 215 is spaced apart along the first axial direction X. The setting plate 199 is locked to the longitudinal rods 235 of the seat back bracket 233 by screws. And move together.

The seat back set 197 according to the drawings further includes two brackets 275 coupled with the setting plate 199, two second clamping pads 273 fixed to the respective brackets 275, and a seat back cushion 279, wherein each bracket 275 is formed. L-shaped and having a bonding piece 277, the bonding piece 277 of each bracket 275 is respectively aligned with the fifth track 215 of the setting plate 199 and located on the front surface 211, and each bracket 275 is locked with the setting plate 199 by screws, when the screws are relaxed The bracket 275 and each of the second clamping pads 273 can be displaced up and down in the third axial direction Z in the range of the fifth rail 215, and the coupling piece 277 of each fifth rail 215 has a lateral groove (as shown in FIG. 5). Therefore, when the screw is loosened, each of the brackets 275 and the second clamping pads 273 can be displaced in the first axial direction X. Similarly, when the screws are locked, the brackets 275 and the second clamping pads 273 cannot follow the first or The second axial direction X, Y displacement. The seat back cushion 279 is coupled to the front surface 211 of the setting plate 199 and is located between the second and second holding pads 273 along the first axial direction X. The seat back cushion 279 is used to support the back of the user, and each of the second grip pads 273 is used to support both sides of the user's back, causing the user's back to be positioned to be unable to move in the first axial direction X.

The seat back set 197 includes a headrest 219 and two armrests 259 coupled to the seat back bracket 233, wherein the headrest 219 is coupled to an end of an adjustment rod 231, and the adjustment rod 231 is slidably sleeved and disposed. The socket portion 217 of the plate 199 is combined. When the socket portion 217 has a screw loose, the headrest 219 and the adjusting rod 231 can be adjusted along the third axial direction Z to be spaced apart from the top end of the setting plate 199. When the screw of the portion 217 is locked, the headrest 219 and the adjustment lever 231 will be positioned to be displaceable in the third axial direction Z. Each armrest 259 includes a frame 271, each of which is coupled to the seat back bracket 233 by a frame 271 and adjacent to the lower end 239, each armrest 259 for supporting the user's arm.

For convenience of explanation, it is assumed that the wheelchair 10 of the present invention is adjusted to a minimum size (as shown in FIGS. 1 and 6), in which the seat back cushion 279 is substantially perpendicular to the seat cushion 195, and each of the first rods 56 is The angle between the top end 58 and the upper end 68 of each of the second rods 66 is at an obtuse angle (as shown in Fig. 6), such that the erecting plate 84 is adjacent to the rail rods 32 of the first bracket 22, and thus the seat cushion 195 is at a height from the ground. Being fixed in the lowest state, each expansion plate 159 is close to each other, and the distance between each of the first clamping pads 179 along the first axial direction X is The minimum state (as shown in Fig. 7), and the first extension arms 119 of the seat tube bracket 117 are mostly housed in the rail tubes 90, so that the seat back cushions 279 are separated from the front stops 194 in the second axial direction Y. The distance of the opening is fixed to the minimum state, and the distance between each of the rear wheels 52 and each of the front wheels 40 along the second axial direction Y is also fixed to the minimum state. The state in which the wheelchair 10 shown in Figs. 1 and 6 is adjusted to the minimum size is suitable for a user with a small body size.

The wheelchair 10 series of the present invention can be expanded according to the body shape adjustment of the user. For example, a child in a growing period can adjust the heightening of the wheelchair 10 as the age increases, and in detail, when the size of the wheelchair 10 is to be adjusted The force of the driving member 80 causes the screw 78 to rotate, so that the screw 72 is pulled along the second axial direction Y toward the front end 26 of each of the extending tubes 24 of the first bracket 22, and the screw 72 pulls the connecting rod 62 to cause the first rods 56. The bottom end 60 is also displaced along the second axial direction Y toward the front end 26 of each of the extension tubes 24 away from the first bracket 22, thereby displacing the second bracket 42 in the second axial direction Y away from the front wheels 40, such that each front wheel 40 and the distance separating the rear wheels 52 along the second axial direction Y, while the top end 58 of each of the first rods 56 and the upper end 68 of each of the second rods 66 are away from the first bracket 22 in the third axial direction Z. The direction of the track bar 32 is displaced, and the first and second bars 56, 66 push the lower frame 96 to move along the third axial direction Z away from the track bars 32 away from the first bracket 22, and thus the entire seat cushion set 82 and the seat back set 197 Both are displaced along the third axial direction Z away from the rail rods 32 of the first bracket 22 (as shown in Figures 9, 10). As shown, the distance between the seat cushion 195 and the ground is increased. In addition, during the rotation of the solenoid 78, the top end 58 of each first rod 56 and the upper end 68 of each second rod are in the second axial direction Y. Closely, the linkage rod 103 is displaced along the second axial direction Y toward the front end 26 of each of the extension tubes 24 away from the first bracket 22. When the linkage rod 103 is displaced, the links 136 are pushed to cause the seat tube bracket 117 to interlock along the entire seat back group 197. The second axial direction Y is displaced toward the front end 26 of each of the extension tubes 24 away from the first bracket 22, such that the seat back cushion 279 of the seat back group 197 is spaced apart from the front gear 194 by a distance along the second axial direction Y. When the displacement of 136 is caused, the fixing members 175 interlock the screw members 177, so that the screw members 177 push the inner walls of the fourth rails 171 of the expansion plates 159, thereby causing the expansion plates 159 and the first clamping pads 179 and Each of the brackets 191 is displaced in the first axial direction X in a direction in which the distance is increased from each other.

The front and rear wheels 40, 52 of the present wheelchair 10 are spaced apart along the second axial direction Y. The increase in distance can increase the area of the chassis 20, further increasing the stability of the wheelchair 10, and further increasing the distance between the first clamping pads 179 along the first axis X can accommodate a wider user of the hips, the back of the chair The distance between the cushion 279 and the front bump 194 in the second axial direction Y is increased to accommodate a user having a long thigh length, and the foot pedal 113, each of the second holding mats 273, and the head can be adjusted together when the size of the wheelchair 10 is adjusted. The position of the pillow 219 allows the various portions of the wheelchair 10 to conform to the size of the user.

Similarly, when the reverse rotation of the solenoid 78 causes the connecting rod 62 to be displaced along the second axial direction Y toward the front end 28 of each of the extension tubes 24 of the first bracket 22, causing the seat cushion group 82 to descend along the third axial direction Z. The seat back group 197 is displaced in the second axial direction Y toward the front end 194, and each of the expansion plates 159, the first clamping pads 179 and the respective brackets 191 are displaced in the first axial direction X toward each other.

In addition to being sized to fit different body users, the present wheelchair 10 can also be tilted by the seat cushion set 82 or the seat back set 197. In detail, when the seat back set 197 is to be tilted, one of the pull handles 257 is pulled. The support member 151 releases the telescopic rod 155. The seat back bracket 233 can rotate relative to each of the second extension arms 131 of the seat tube bracket 117 in a state where the telescopic rod 155 can be telescopically displaced. When the seat back bracket 233 is rotated, the support member 151 is stretched and contracted. When the rod 155 is retracted, the angle between the seat back cushion 279 and the seat cushion 195 is increased, and when the seat back bracket 233 causes the telescopic rod 155 of the support member 151 to be displaced, the seat back cushion is caused. The angle between the 279 and the seat cushion 195 is reduced, so that the seat back group 197 is inclined with respect to the seat cushion group 82 in a state where the seat cushion 195 is not rotated (as shown in Fig. 12), and is released in such a state. When the pull lever causes the telescopic rod 155 of the support member 151 to be fixed and cannot be moved, the seat back group 197 can be fixed in an inclined state. Similarly, if the seat back bracket 233 is adjusted to cause the extension of the telescopic rod 155 of the support member 151, the angle between the seat back cushion 279 and the seat cushion 195 is reduced.

When the seat cushion group 82 and the seat back group 197 are to be tilted at the same time, the other pull handle 257 is pulled, causing the spring cylinder 291 to release the actuating lever 292. At this time, since the telescopic rod 155 of the support member 151 is fixed, the seat back is rotated. When the bracket 233 is used, the seat tube bracket 117 is linked to the mounting plate 84 to pivot along the fixed rod 105, so that the seat cushion group 82 and the seat back group 197 are pivoted together (as shown in Fig. 13), and each Card of link 136 The joint end 139 is disengaged from the linkage rod 103, and each rail tube 90 is spaced apart from the upper end surface 99 of the lower frame 96. When the release lever 257 causes the actuation rod 292 of the spring cylinder 291 to be fixed, the mounting plate 84 of the seat cushion group 82 is The spring cylinder 291 is pulled and thus held in an inclined state, so that the weight of the wheelchair 10 can be dispersed to the buttocks and the back, thereby reducing the problem of acne caused by riding the wheelchair 10 for a long time.

The wheelchair 10 of the present invention can further adjust the inclination of the seat back group 197 in a state where the seat cushion group 82 shown in FIG. 13 is inclined, so that the seat back cushion 279 of the seat back group 197 is not perpendicular to the seat cushion 195, in detail, Releasing the telescopic rod 155 of the support member 151 in such a state causes the seat back bracket 233 of the seat back group 197 to pivot relative to the seat tube bracket 117, so that the rotation of the seat back bracket 233 causes the telescopic rod 155 of the support member 151 to be inside. By reducing the displacement, the seat back cushion 279 can be adjusted to be non-perpendicular to the seat cushion 195 (as shown in Fig. 14).

The wheelchair 10 of the present invention can adjust the distance between the front and rear wheels 40, 52, the height of the seat cushion 195 from the ground, the distance between the two first clamping pads 179, and the chair by the rotating screw 78. The distance between the back cushion 279 and the front bumper 194 is such that it can be used by users of different body types, or adjusted as the user ages and the body size increases, and the front and rear wheels 40, 52 are separated when the wheelchair 10 size is adjusted. The increased distance makes the wheelchair 10 more stable and less prone to tipping over. In addition, the seat back set 197 can be independently adjusted to a comfortable angle, and the seat cushion set 82 can be adjusted to tilt together with the seat back set 197, so that the weight of the user who rides the wheelchair 10 for a long time is dispersed to the buttocks and the back, reducing the long-term ride. The problem of acne on the buttocks.

The basic teachings of this creation have been described, and many extensions and variations will be apparent to those of ordinary skill in the art. For example, the seat back set 197 may not include the armrest 259, and in the absence of the armrest 259, the tilting operation of the wheelchair 10 resizing or the seat cushion set 82 and the seat back set 197 of the present creation is not affected. In addition, the seat back group may not include the headrest 219, and in the state lacking the headrest 219, the tilting operation of the wheelchair 10 resizing or the seat cushion group 82 and the seat back group 197 of the present creation is not affected. Alternatively, the seat back group may not include the used push rod 255, and the tilting operation of the wheelchair 10 resizing or the seat cushion group 82 and the seat back group 197 of the present creation is not affected in the absence of the hand push rod 255. again The drive member 80 may be a device that is operated by electric power, such as a motor, so that the size of the wheelchair 10 can be adjusted by turning the switch on or off. Moreover, the seat cushion group 82 may not include the expansion plate 159 and the first clamping pad 179, such that the seat cushion 195 is directly disposed on the upper surface 86 of the mounting plate 84. In this state, the rotating screw 78 can still adjust the seat cushion. The height of 195, the distance separating the front and rear wheels 40, 52, and the distance separating the seat back cushion 279 from the front block 194.

In addition, the seat cushion group 82 may not include the spring cylinder 291, and thus the rail tube 90 and the lower frame 96 are coupled by welding, for example, so that the mounting plate 84 and the rail tubes 90 cannot be rotated by the fixed rod 105. The seat cushion group 82 is prevented from rotating together with the seat back group 197, so that the seat cushion 195 of the seat cushion group 82 is always held in parallel with the rail rods 32 of the first bracket 22, so that the seat cushion group 82 cannot be adjusted to be inclined. However, the rotational drive member 80 can still adjust the size of the wheelchair 10.

The present invention disclosed in the specification is to be considered as illustrative and not restrictive. The scope of the present invention is defined by the scope of the appended claims, and is not intended to be limited by the scope of the invention.

10‧‧‧ Wheelchair

20‧‧‧Chassis

22‧‧‧First bracket

24‧‧‧ Extension tube

26‧‧‧ front end

28‧‧‧ Backend

32‧‧‧ Track Rod

34‧‧‧First track

36‧‧‧crossbar

38‧‧‧ pivoting ears

40‧‧‧front wheel

46‧‧‧ Sockets

50‧‧‧round frame

52‧‧‧ Rear wheel

56‧‧‧first shot

58‧‧‧Top

60‧‧‧ bottom

62‧‧‧ Connecting rod

64‧‧‧ lugs

66‧‧‧second shot

68‧‧‧Upper

72‧‧‧ screw

76‧‧‧ pivotal parts

78‧‧‧Solenoid

80‧‧‧ drive parts

82‧‧‧Cushion set

84‧‧‧Equipped board

107‧‧‧foot bracket

111‧‧‧ longitudinal section

113‧‧‧ pedals

115‧‧‧Combination Department

117‧‧‧Seat tube bracket

118‧‧‧ main pole

131‧‧‧Second extension arm

135‧‧‧ Second pivot

151‧‧‧Support

153‧‧‧ first end

155‧‧‧ Telescopic rod

157‧‧‧ second end

159‧‧‧ expansion board

179‧‧‧First Clamp

191‧‧‧ bracket

194‧‧‧ front gear

195‧‧‧ seat cushion

197‧‧‧Back Chair Set

199‧‧‧Setting board

219‧‧‧ head pillow

231‧‧‧ Adjusting rod

233‧‧‧back seat bracket

235‧‧‧ longitudinal rod

255‧‧‧Hand putter

257‧‧‧ pull

259‧‧‧Handrail

273‧‧‧Second clamping pad

275‧‧‧ bracket

279‧‧‧Backrest cushion

Claims (7)

A resizable wheelchair includes: a first bracket (22) including two extension tubes (24) spaced along a first axial direction (X), each extension tube (24) including a first axis a front end (26) and a rear end (28) spaced apart from a second axial direction (Y) of (X), the first bracket (22) further comprising a second extension tube (24) and along the first Two rail rods (32) spaced axially (X), and a crossbar (36) extending between the ends of each rail rod (32); two front wheels (40), respectively, with the front end of the extension tube (24) (26) pivoting; a second bracket (42) comprising a connecting tube (44), and two legs (48) and two sockets (46) extending from the outer peripheral surface of the connecting tube (44), each socket ( 46) slidably coupled to each of the extension tubes (24); the two rear wheels (52) are pivotally disposed on the two outer sides of the second bracket (42) and move together along the second axial direction (Y); a rod (56) each including a top end (58) and a bottom end (60), the bottom end (60) of each first rod (56) being combined with the first rail (34) of each rail rod (32) Relatively sliding, and each bottom end (60) is respectively pivotally connected with each leg (48) of the second bracket (42); a connecting rod (62) is fixed to the first branch of the two Between (56); two second rods (66) each including an upper end (68) and a lower end (70), and the lower end (70) of each second rod (66) is pivotally connected to each rail rod (32) The upper and lower ends (68, 70) of each second rod (66) are respectively pivotally connected with the top and bottom ends (58, 60) of the first rod (56); a pivoting member (76), a pivotal connection with the crossbar (36) of the first bracket (22); a solenoid (78) pivotally connected to the pivoting member (76); a screw (72) including a pivotal connection with the connecting rod (62) The pivoting end (74), the screw (72) is screwed with the solenoid (78), and when the solenoid (78) rotates, the screw (72) interlocks the connecting rod (62) away from the second axial direction (Y) or The rear end (28) of each of the extension tubes (24) adjacent to the first bracket (22) is displaced, causing the top end (58) of each first rod (56) to be perpendicular to the upper end (68) of each second rod (66). Displaced in a third axial direction (Z) of the first and second axial directions (X, Y) toward or away from each of the rail rods (32); The two rail tubes (90) are respectively pivotally connected to the first rods (56), and each of the rail tubes (90) includes a first sleeve end (92) and a second sleeve end (94), and each rail tube (90) The second set of ends (94) are respectively pivotally connected to the top end (58) of the first rod (56); the lower frame (96) is combined with the first and second rods (56, 66), and the lower frame (96) ) comprising two second tracks (98) and two ends (97) spaced along a first axial direction (X), the lower frame (96) further comprising an upper end surface (99), each end (97) and a second end, respectively The top end (58) of the rod (66) is pivoted, and each rail tube (90) abuts against the upper end surface (99) of the lower frame (96), and the upper end (68) and the second track of each second rod (66) (98) combined and displaceable in the second axial direction (Y) toward or away from the top end (58) of each of the first rods (56); a mounting plate (84) including an upper surface (86) and a lower surface (88) The lower surface (88) of the erection plate (84) is fixed to each of the rail tubes (90); a mat (195) is combined with the erecting plate (84) and is located on the upper surface (86); 197), combined with each rail tube (90); when the rotating screw (78) causes the top end (58) of each first rod (56) and the upper end (68) of each second rod (66) along the third axial direction (Z) approaching each track (32) When displaced, the second bracket (42) is displaced in the second axial direction (Y) toward the front end (26) of each of the extension tubes (24), and the mounting plate (84) and the seat cushion (195) are adjacent to each other. The rail rod (32) is displaced, causing the distance between each front wheel (40) relative to each rear wheel (52) along the second axial direction (Y) to be reduced, and the height of the seat cushion (195) from the ground is reduced when the screw is rotated (78) causing the top end (58) of the first rod (56) and the upper end (68) of each second rod (66) to be displaced away from each of the rail rods (32) along the third axial direction (Z), the second bracket ( 42) displaced along the second axial direction (Y) away from the front end (26) of each of the extension tubes (24), and the mounting plate (84) and the seat cushion (195) are moved away from the respective rail rods along the third axial direction (Z) (32) Displacement, causing the distance separating the front wheels (40) from the respective rear wheels (52) along the second axial direction (Y), and the height of the seat cushion (195) from the ground is increased. The resizable wheelchair of claim 1, wherein the seat back set (197) comprises a seat back bracket (233) and a seat back cushion (279), wherein the seat back bracket (233), the seat back The bracket (233) includes two longitudinal rods (2) spaced along the first axial direction (X) 35), each longitudinal rod (235) includes an upper end (237) and a lower end (239), the seat back cushion (279), combined with the seat back bracket (233) to move together; comprising: a linkage rod (103) Passing through each of the second rails (98) of the lower frame (96) and the upper ends (68) of the respective second rods (66), resulting in the upper end (68) and the second rail (98) of each of the second rods (66) Combined and displaced along the second axial direction (Y) toward or away from the top end (58) of each of the first rods (56); a foot bracket (107), and a first socket end of each rail tube (90) (92) a combination of a foot pedal (113) coupled with the foot support (107); a tube support (117) slidably coupled to each of the track tubes (90), the seat tube bracket (117) including a main The rod (118), and the two first extension arms (119) seat tube brackets (117) formed on the outer peripheral surface of the main rod (118) further include a first pivot portion (133) formed on the main rod (118), Each of the first extension arms (119) of the seat tube bracket (117) is movable relative to the second socket end (94) of each rail tube (90); the two links (136) each include a seat tube bracket (117) a joint end (137) pivotally connected to the first pivot portion (133), and an engaging end (139) coupled to the linkage rod (103), The seat tube bracket (117) is moved together with the lower end (239) of each longitudinal rod (235); when the rotating solenoid (78) causes the top end (58) of each first rod (56) and each second rod (66) When the upper end (68) is displaced in the third axial direction (Z) toward the respective rail rods (32), the linkage rod (103) pushes the connecting rod (136) and the seat tube bracket (117) to cause the seat back bracket (233). Displaced along the second axial direction (Y) toward the front end (26) of each extension tube (24) together with the seat back cushion (279), and the foot bracket (107), the foot pedal (113), the seat tube bracket (117) and the connecting rod (136) are displaced toward the respective rail rods (32), and when the rotating coil (78) causes the top end (58) of the first rod (56) and the upper end of each second rod (66) (68) When the third axial direction (Z) is displaced away from each of the rail rods (32), the upper end (68) of each second rod (68) interlocks the connecting rod (136) to push the seat tube bracket (117) to cause the seat back bracket (233). Displaced along the second axial direction (Y) toward the front end (26) of each of the extension tubes (24) together with the seat back cushion (279), and the foot bracket (107), the foot pedal (113), the seat tube The bracket (117) and the connecting rod (136) are along the third axial direction (Z) Displaces away from each rail rod (32). The resizable wheelchair of claim 2, wherein the mounting plate (84) comprises two third tracks (101) extending from the upper surface (86) to the lower surface (88), each of the third tracks ( 101) Between each rail tube (90) along a first axial direction (X), further comprising: two expansion plates (159) slidably disposed on the upper surface of the seat cushion (195) and the mounting plate (84) (86) Between the two, the expansion board (159) includes two second rails (171) that are inclined; the two fixing members (175) are respectively fixed to the connecting rod (136) and move along the second axial direction (Y). The two fixing members (175) are located below the lower surface (88) of the mounting plate (84) along the third axial direction (Z) and respectively aligned with the third track (101); four screwing members (177), each screwing The piece (177) is located in the fourth track (171) of each expansion board (159) and is screwed to the fixing member (175) by each third rail (101) of the mounting board (84); two brackets (191), each Fixed to the expansion board (159) and moved together, and each bracket (191) is located outside the two sides of the seat cushion (195) along the first axial direction (X); two first clamping pads (179), and the bracket (191) fixed and moved together, each first clamping pad (179) is located above the seat cushion (195) along the third axial direction (Z) When the erecting plate (84) is displaced in a direction away from each of the rail rods (32) along the third axial direction (Z), each of the connecting rods (136) interlocks the fixing members (175) along the second axial direction (Y) toward The front end (26) of each of the extension tubes (24) away from the first bracket (22) is displaced, so that the screw members (177) press against the inner walls of the fourth rails (171) of the expansion boards (159), resulting in Each expansion plate (159) is interlocked with each of the first clamping pads (179) and the first clamping pads (179) in a direction away from each other in the first axial direction (X), when the mounting plate (84) is along the third axial direction (Z) When moving toward the direction of each rail rod (32), each link (136) interlocks each fixing member (175) in the second axial direction (Y) toward each of the extension tubes (24) of the first bracket (22). The front end (26) is displaced, so that the screw members (177) press against the inner walls of the fourth rails (171) of the expansion boards (159), causing the expansion boards (159) to interlock the brackets (191) and the respective The first clamping pads (179) are displaced in a direction in which the first axial direction (X) is close to each other. The resizable wheelchair of claim 2, wherein the seat back bracket (233) further comprises an intermediate rod (251) formed between the two longitudinal rods (235), the intermediate rod (251) comprising a a pivoting protrusion (253), the seat tube bracket (117) further comprising two second extension arms (131) formed on an outer circumferential surface of the main rod (118), and the two first extension arms (119) along the first axial direction (X) Between the two second extension arms (131), the seat tube bracket (117) further includes a second pivot portion (135) formed on the outer circumferential surface of the main rod (118), and longitudinal rods of the seat back bracket (233) The lower end (239) of the (235) is respectively pivotally connected to the second extension arm (131) of the seat tube bracket (117), and further includes: a support member (151) including a telescopic telescopic rod (155), the support member (151) further comprising a first end (153) pivotally coupled to the pivotal projection (253) of the seatback bracket (233), and a second end located at the end of the telescopic rod (155) and the seat tube bracket (117) a second end (157) pivotally connected to the pivot portion (135); when the telescopic rod (155) of the support member (151) is displaced and retracted, the seat back bracket (233) is slanted and displaced by the seat back cushion (279), resulting in The angle between the back cushion (279) and the seat cushion (195) When the telescopic rod (155) of the support member (151) is displaced outward, the seat back bracket (233) is slanted and displaced by the seat back cushion (279), resulting in a space between the seat back cushion (279) and the seat cushion (195). The angle is reduced. The resizable wheelchair of claim 2, wherein the lower surface (88) of the mounting plate (84) forms a second pivoting arm (104), and the engaging end of each connecting rod (136) (139) Having a U-shaped groove, the engaging end (139) is detachably pivotally connected to the linkage rod (103), and each of the rail tubes (90) is rotatably separated from the upper end surface (99) of the lower frame (96), Further comprising: a fixing rod (105) passing through the second pivoting arm (102) of each rail tube (90), the top end (58) of each first rod (56), and the joint end of each connecting rod (136) ( 137) and each end (97) of the lower frame (96), causing the erecting plate (84), each rail rod (90) and each connecting rod (136) to pivot a spring cylinder with the fixing rod (105) as an axis (291) comprising an actuating lever (292) displaceable along a cylinder of the spring cylinder (291), the spring cylinder (291) further comprising a first pivoting portion formed at one of the ends of the actuating lever (292) ( 293) and a second pivoting portion formed on the cylinder block (2) 95), the first pivoting portion (293) is pivotally connected to the second pivoting arm (104) of the mounting plate (84), the second pivoting portion (295) is pivotally connected to the linkage rod (103); and the spring cylinder (291) When the actuating lever (292) is fixed, the mounting plate (84), the rail rods (90), and the respective links (136) are positioned by the spring cylinder (291) and cannot be pivoted with the fixed rod (105) as an axis; When the spring cylinder (291) releases the actuating lever (292), the mounting plate (84), the rail rods (90) and the respective connecting rods (136) pivotally actuate the moving rod (292) to move, further causing the seat cushion (195) It is adjusted to be in a non-parallel state with each of the rail rods (32) of the first bracket (22). The resizable wheelchair of claim 2, wherein the seat back bracket (233) further comprises a second-hand putter (255) formed on the surface of each longitudinal rod (235) and located at the upper end (237), further comprising a setting plate (199) is coupled between the two longitudinal rods (235) of the seat back bracket (233) and the seat back cushion (279), and the setting plate (199) includes a pair of the seat back cushions (279). The front surface (211) and a rear surface (213) abutting against each longitudinal rod (235), the setting plate (199) further comprising a set of joints (217) formed on the rear surface (213); an adjusting rod ( 231) slidably sleeved with the socket portion (217) of the setting plate (199); a headrest (219) that moves together with the socket rod (231); two frames (271), each frame ( 271) slidably sleeved on each longitudinal rod (235) of the seat back bracket (233); two armrests (259) are respectively fixed to move together with each frame (271); two brackets (275) can be The first axial direction (X) is slidably coupled to the front surface (211) of the setting plate (199), and each of the brackets (275) is located outside the two sides of the seat back cushion (279); and the second clamping pad (273) , and move together with each bracket (275). The resizable wheelchair of claim 2, wherein the foot support (107) further comprises a transverse section (109) coupled to the first socket end (92) of each rail tube (90) and a longitudinal section (111), the foot pedal (113) includes a foot bracket (10) 7) A combined portion (115); when the joint (115) is relaxed, the position of the foot pedal (113) can be adjusted along the third axial direction (Z).