TWI769620B - Adjustable body support - Google Patents

Abstract

An adjustable body support device is suitable for being installed in a wheelchair. The wheelchair includes a seat and two back bars. The adjustable body support device includes two connecting structures and a supporting structure. The connecting structures are respectively installed on the back bars so as to be displaceable up and down. The support structure includes a backrest board and two side restboards. Each side support plate has a side support portion extending forward from the side edge of the back support board, and the side support portions of the side support boards are respectively connected to the connecting structures. Wherein, the support structure can adjust the height of the support structure relative to the seat with the movement of the connecting structures, so as to adjust the backrest plate of the support structure to a level suitable for the user according to the body shape and sitting posture of the user. The position where the back leans back, so that the user can lean back at any angle according to personal preference, so as to achieve the purpose of making the user's posture comfortable when sitting and standing.

Description

Adjustable body support

The present invention relates to a body support device, in particular to an adjustable body support device suitable for being installed in a wheelchair.

Some handicapped or elderly people with limited mobility or physical disabilities usually use wheelchairs as means of transportation. However, under the condition of long-term lack of exercise, the muscles of wheelchair users will gradually lose strength and cannot maintain a sitting posture. . In order to prevent the person with weak muscles from falling from the wheelchair when sitting and standing, a body support device can be added to the wheelchair to support the user's body so that they can sit and stand on the wheelchair naturally and stably. However, the existing body support devices are often not suitable for every user due to the different body shapes and different sitting postures of the users.

Therefore, the purpose of the present invention is to provide an adjustable body support device that can adjust the size and installation position according to the user's body shape and sitting posture, and make the user's posture comfortable and supportive when sitting and standing.

Therefore, the adjustable body support device of the present invention is suitable for being mounted on a wheelchair. The wheelchair includes a seat and two back bars spaced apart from each other and erected on the top side of the seat. The adjustable body support device includes two connecting structures and a supporting structure. The connecting structures are respectively installed on the back bars so as to be displaceable up and down. Each connecting structure includes a displacement through hole sleeved with the corresponding back rod. The support structure includes a backrest plate for the back of the user to abut against, and two side backboards respectively connected to the left and right sides of the backrest plate. The side rests are used to support both sides of the user's body, respectively. Each side support plate has a side support portion extending forward from the side edge of the back support board, and the side support portions of the side support boards are respectively connected to the connecting structures. Wherein, the support structure can adjust the height of the support structure relative to the seat as the connecting structures move.

In some embodiments, each side support portion has at least one longitudinally extending engaging longitudinal groove, and different height positions of each engaging longitudinal groove can be used for screwing and fixing the corresponding engaging structure.

In some embodiments, each side support portion has at least one engaging longitudinal groove extending longitudinally; each engaging structure includes a fixed component and a movable component connected to the fixed component, and each fixed component has the displacement through-hole holes, each movable component has a top seat and a plurality of first screw groups, each top seat has a plurality of first coupling holes aligned with the coupling longitudinal groove, one end of the first screw groups of each of the movable components Passing through the corresponding engaging longitudinal grooves and respectively passing out from the corresponding first engaging holes, so that the movable component can be detachably locked to the corresponding side support portion, wherein the first engaging holes of each movable component are detachably locked. A screw group can be inserted and fixed from any position of the corresponding engaging longitudinal grooves, so that the height of the support structure relative to the seat can be arbitrarily adjusted along the engaging longitudinal grooves.

In some embodiments, each engagement structure includes a fixed component and a movable component pivotally connected to the fixed component, each fixed component has a base and a pivot connected to the base and extending longitudinally A rotating shaft, each base has the displacement through hole, each movable component has a top seat connected to the corresponding side support portion, each top seat has a longitudinally extending pivot hole for the corresponding pivot shaft to penetrate , wherein, each of the movable components can rotate relative to the corresponding fixed component with the corresponding pivot axis as the axis to drive the lateral displacement of the support structure.

In some embodiments, each movable component further has a fixing screw penetrating the corresponding top seat, and the top side of each pivot shaft has a threaded hole for the corresponding fixing screw to be detachably screwed, wherein, The fixing screws can be screwed into the threaded holes respectively, so that the movable components cannot be rotated relative to the fixed components respectively.

In some implementations, the engaging structures are pivotably mounted on the back bars, respectively.

In some implementations, each engaging structure further includes a limit hole that communicates with the outer surface of the engaging structure and communicates with the displacement through hole, and a limit screw detachably penetrated through the limit hole, the The limit screws can be pressed against the back rods respectively so that the connecting structures cannot be displaced relative to the back rods.

In some embodiments, each connecting structure includes a fixed component and a movable component connected to the fixed component, each fixed component has a base, and each base has a base body, a base fixing block and several The second screw group, each base body has a first groove surface, and a plurality of second connecting holes passing through, each base fixing block has a second groove surface opposite to the corresponding first groove surface, and A plurality of penetrating third connecting holes, each of the first groove surface and the corresponding second groove surface jointly define the displacement through hole, and the second screw groups of the bases respectively penetrate into the corresponding holes of the base body The second engaging holes and the corresponding third engaging holes of the base fixing block enable each of the bases to be detachably installed on the corresponding back rod.

In some embodiments, the backrest plate has at least one engaging transverse groove extending laterally, and each side backrest plate has a side plate engaging portion for being fixed on the backrest plate and connected to the side support portion and several A third screw group, each side plate connecting portion has a plurality of fourth connecting holes aligned with the connecting transverse groove, and the third screw groups of each side plate respectively penetrate into the corresponding third screw groups of the side plate connecting portion. The four engaging holes and the engaging transverse grooves of the backrest plate enable each of the side panel engaging portions to be detachably installed on the backrest panel, wherein the third screw sets of each of the side resting panels can be removed from the engaging transverse grooves. Any position of the groove is penetrated, so that the distance between the connecting parts of the side plates can be adjusted arbitrarily along the connecting transverse groove.

In some embodiments, the adjustable body support device further includes a back support frame, the back support frame includes an arc-shaped frame body for covering the body, and a fixing structure disposed behind the frame body , and a plurality of fourth screw groups penetrating the fixing structure and the frame body and penetrating the connecting transverse groove, these fourth screw groups can penetrate into any position of the connecting transverse groove to enable the back support frame to be installed On the support structure, the position can be adjusted along the engaging transverse groove.

Therefore, the adjustable body support device of the present invention is suitable for being mounted on a wheelchair. The wheelchair includes a seat and two back bars spaced apart from each other and erected on the top side of the seat. The adjustable body support device includes two connecting structures and a supporting structure. The connecting structures are respectively installed on the back rods. The support structure includes a backrest plate for the back of the user to abut against, and two side backboards respectively connected to the left and right sides of the backrest plate. The side rests are used to support both sides of the user's body, respectively. Each side reclining board has a side support portion extending forward from the side edge of the back reclining board. Each side support portion has at least one longitudinally extending engaging longitudinal groove. Wherein, the different height positions of the connecting longitudinal grooves can be screwed and fixed by the corresponding connecting structure, so that the height of the supporting structure relative to the seat can be arbitrarily adjusted along the connecting longitudinal grooves.

The effect of the present invention lies in that the connecting structures are installed on the back bars to be able to displace up and down, so that the supporting structure can be adjusted in height relative to the seat with the movement of the connecting structures, so as to correspond to the user The backrest plate of the support structure is adjusted to a position where the back of the user can lean back against the body shape and sitting posture of the support structure. The structure is screwed and fixed, so that the backrest plate of the support structure can be adjusted relative to the height of the connection structure as the locking position of the connection structure changes, and the backrest plate can also be adjusted according to the user's body height and sitting posture. It is adjusted to a position for the user's back to lean back, so that the user can lean back at any angle according to personal preference, so as to achieve the purpose of making the user's posture comfortable when sitting and standing.

On the other hand, any position of the connecting transverse groove can be used for each of the side plate to be screwed and fixed, so that the side support parts can adjust the distance between each other according to the change of the locking position of the side plate connecting parts, respectively, The side support parts are adjusted to be able to lean against the sides of the user's body according to the body shape of the user, so that the user can still be supported by the side support parts when the user's muscles are weak and tilted, so that the user can still be supported by the side support parts. The purpose of good support when sitting and standing.

In addition, in order to make the user feel more comfortable when using the adjustable body support device, the cross-sectional shapes of the side rest plates of the adjustable body support device will be different according to the body shape of the user. The design of the angle, that is to say, the included angle of each side support part relative to the corresponding side plate connecting part is different during manufacture, so when the adjustable body support device is installed on the back rods, it can be adjusted by Rotate each of the movable components around the corresponding pivot axis to match the included angle of each of the side supports to align with the connecting longitudinal grooves of each of the side supports, so that the adjustable body support device can be adapted to different body shapes. suitability for users. In addition, because the frame body is covered on the body, and the fourth screw sets can penetrate the frame body and be locked at any position of the connecting transverse groove, so that the back support frame is installed on the support structure and can be along the The adjustment of the position of the connecting transverse groove enables the user to be prevented from falling from the wheelchair by the frame fixed to the supporting structure when the user falls to the front side and the left and right sides, thereby achieving good supportability of the adjustable body support device. For the purpose of good safety, at the same time, the back support frame can also adjust the locking position of the frame body laterally, so as to achieve the purpose of adjusting the installation position of the back support frame according to the user's body shape and sitting posture.

Referring to FIG. 1 to FIG. 3 , it is an embodiment of the adjustable body support device 100 of the present invention. The adjustable body support device 100 is suitable for being mounted on a wheelchair 9 . The wheelchair 9 includes a seat 91, two back bars 92 spaced apart from each other and erected on the top side of the seat 91, and components such as wheels, armrests, push handles, pedals, etc. not shown in the drawings. The back bars 92 The structure is not limited to the content disclosed in this embodiment, and can be adjusted according to actual needs.

The adjustable body support device 100 includes two connecting structures 1 , a supporting structure 4 respectively connected to the connecting structures 1 , and a back support frame 5 installed on the supporting structure 4 as shown in FIG. 1 . Subsequently, for the convenience of description, the back support frame 5 is not shown in FIG. 4 to FIG. 7 . The connecting structures 1 are respectively installed on the back rods 92 . Each engaging structure 1 includes a fixed component 2 that can be displaced vertically and laterally pivotally connected to the corresponding back bar 92 , and a movable component 3 that can be laterally pivoted to the fixed component 2 .

Referring to FIGS. 2 to 7 , each fixing component 2 has a base 21 and a pivot shaft 22 connected to the base 21 and extending longitudinally (see FIG. 3 ). The top side of each pivot shaft 22 has a threaded hole 221 (see FIG. 3 ). Each base 21 has a displacement through hole 210 extending longitudinally through the base 21 , a base body 211 , a base fixing block 212 , and a plurality of second screw groups penetrating through and capable of locking the base body 211 and the base fixing block 212 213 , a limiting hole 214 extending through the outer surface of the connecting structure 1 and communicating with the displacement through hole 210 , and a limiting screw 215 detachably penetrating the limiting hole 214 . Each base body 211 has a first groove surface 216 and a plurality of second engaging holes 217 extending laterally therethrough. Each base fixing block 212 has a second groove surface 218 opposite to the corresponding first groove surface 216 , and a plurality of third engaging holes 219 penetrating laterally. Each of the first groove surfaces 216 and the corresponding second groove surfaces 218 together define the displacement through hole 210 . As shown in FIG. 6 and FIG. 7 , each of the displacement through holes 210 is sleeved on the corresponding back rod 92 , so that each of the bases 21 can pivot around the corresponding back rod 92 , and can pivot as shown in FIG. 5 . It shows up and down displacement along the extension direction of the corresponding back bar 92 . Each of the limiting holes 214 may pass through one of the base main body 211 and the base fixing block 212, depending on actual needs. In this embodiment, each of the limiting holes 214 is fixed through the corresponding base. Example of block 212. As shown in FIG. 2 , the limit screws 215 can press against the back rods 92 respectively so that the engaging structures 1 cannot be displaced or rotated relative to the back rods 92 . In the present embodiment, the limit screws 215 are stop screws.

Referring to FIG. 2, FIG. 3 and FIG. 6, FIG. 7, the steps of installing the connecting structures 1 on the wheelchair 9 are as follows. First, loosen the second screw groups 213 to separate the base body 211 from the corresponding base fixing block 212 . Next, each of the first groove surfaces 216 and the corresponding second groove surfaces 218 are respectively abutted on opposite sides of the corresponding back bar 92 , and the second engaging holes 217 are aligned with the corresponding ones respectively. The third engaging hole 219 . Next, the heights of the fixing components 2 relative to the seat 91 are adjusted up and down, and the distances between the pivot shafts 22 of the fixing components 2 are adjusted laterally. Finally, the second screw groups 213 are respectively inserted into the corresponding second connecting holes 217 and the third connecting holes 219, so that the base body 211 and the corresponding base fixing block 212 are locked, and then The limiting screws 215 are pressed inwardly, so that the fixing components 2 of the connecting structures 1 can be firmly installed on the back rods 92 respectively.

The movable components 3 are respectively connected to the left and right sides of the support structure 4 . Each movable element 3 has a top seat 31 , a plurality of first screw groups 32 , and a fixing screw 33 penetrating the corresponding top seat 31 and detachably screwed to the corresponding threaded hole 221 . Each top seat 31 has a plurality of first engaging holes 311 extending laterally through which the first screw groups 32 respectively penetrate, and a pivoting hole 312 extending longitudinally. Each of the pivot holes 312 is for the corresponding pivot shaft 22 to penetrate, so that each of the top seats 31 can be rotated relative to the corresponding base 21 with the corresponding pivot shaft 22 as the axis as shown in FIG. 2 to align the The side of the support structure 4 . Each of the fixing screws 33 can be screwed into the corresponding threaded hole 221 , so that each of the top seats 31 cannot be rotated relative to the corresponding base 21 .

Referring to FIGS. 2 to 7 , the support structure 4 includes a backrest plate 41 for the back of the user to abut against, and two side backrest plates 42 respectively connected to the left and right sides of the backrest plate 41 . The backrest plate 41 has at least one engaging transverse groove 411 extending laterally (here, three examples are used). Each side backboard 42 has a side support portion 421 extending forward from the side edge of the backrest board 41 , a side board engaging portion 422 for being fixed on the backrest board 41 and connected to the side support portion 421 , and a plurality of third screw groups 423 respectively used for penetrating the connecting transverse grooves 411 .

Each side support portion 421 has at least one longitudinally extending engaging longitudinal groove 424 (two examples are shown here). The engaging longitudinal grooves 424 of each side support portion 421 are respectively aligned with the corresponding first engaging holes 311 of the movable component 3 . The engaging longitudinal grooves 424 of each of the side support portions 421 and the corresponding first engaging holes 311 of the movable component 3 are provided for the corresponding first screw groups 32 of the movable component 3 to penetrate, so that each side The support portion 421 is detachably connected to the corresponding movable component 3 and can be laterally displaced with the rotation of the corresponding fixed component 2 . On the other hand, the first screw groups 32 of each movable component 3 can be respectively penetrated and fixed from any position of the engaging longitudinal grooves 424 of the corresponding side support portion 421 , so that the support structure 4 is relative to the chair. The height of the seat 91 can be arbitrarily adjusted along the engaging longitudinal grooves 424 as shown in FIG. 4 .

The side panel engaging portions 422 are respectively used to support both sides of the user's body. Each side plate engaging portion 422 has a plurality of fourth engaging holes 425 respectively aligned with the engaging transverse grooves 411 . The engaging transverse grooves 411 of the backrest plate 41 and the corresponding fourth engaging holes 425 of the side plate engaging portion 422 are provided for the corresponding third screw groups 423 of the side resting plate 42 to penetrate, so that each of the The side rest plate 42 is detachably connected to the back rest plate 41 . In particular, the third screw groups 423 of each of the side panels 42 can penetrate through any position of the respective engaging transverse grooves 411 , so that the side supporting portions 421 can follow the side panel engaging portions as shown in FIG. 4 . 422 and the backrest plate 41 can be adjusted arbitrarily by changing the engagement position of the backrest plate 41 .

As shown in FIG. 6 , the cross-section of the support structure 4 is an inverted U-shape. In this embodiment, the cross-section of each of the side backing boards 42 is similar to a V-shape, so that the cross-section of the part of the supporting structure 4 assembled by the side backing boards 42 and the back backing board 41 is open outward. Expanded inverted U shape. However, the specific shape of the support structure 4 is designed to correspond to the body shape of the user during manufacture, so in other embodiments, the cross-section of each side rest plate 42 may also be L-shaped. In this way, the support structure The cross-section of 4 is an inverted U-shaped opening with an equal size, and the side panels 42 of appropriate shapes can be selected to be installed on the connecting structures 1 respectively through disassembly and replacement. When replacing the side resting boards 42 of different shapes, the top seats 31 can be driven to align with the side surfaces of the side resting boards 42 by rotating the fixing components 2 of the connecting structures 1 respectively, so that the The support structure 4 is easy to install and replace.

Referring to FIGS. 1 to 3 , the back support frame 5 is used to properly support the spine and distribute the bearing force of the spine, and includes an arc-shaped frame body 51 for wrapping the body, a frame body 51 disposed on the frame body 51 The rear fixing structure 52 and a plurality of fourth screw groups 53 penetrate through the fixing structure 52 and the frame body 51 and penetrate into the connecting transverse groove 411 . The fourth screw sets 53 can penetrate into any position of the engaging transverse groove 411 , so that the back support frame 5 is installed on the supporting structure 4 and can be adjusted along the engaging transverse groove 411 .

When in use, the user can sit on the seat 91 first, and adjust the distance between the side support parts 421 and the height of the backrest plate 41 relative to the seat 91 in sequence, so that the user's body can be left and right. The two sides and the back can be supported by the side support parts 421 and the backrest plate 41 at optimal positions, respectively.

To sum up, by installing the engaging structures 1 on the back bars 92 in a displaceable manner up and down, the support structure 4 can be adjusted in height relative to the seat 91 as the engaging structures 1 move. The backrest plate 41 of the support structure 4 is adjusted to a position where the back of the user can lean back against the user's body shape and sitting posture. The height position can be screwed to fix the corresponding connecting structure 1, so that the backrest plate 41 of the supporting structure 4 can be adjusted relative to the height of the connecting structure 1 as the locking position of the connecting structure 1 changes. The backrest board 41 is adjusted to a position where the back of the user can lean back according to the user's body height and sitting posture, so that the user can lean back at any angle according to personal preference, so as to achieve a comfortable posture when the user is sitting and standing. Purpose.

On the other hand, any position of the engaging transverse groove 411 can be used for screwing and fixing the side resting plates 42 , so that the side supporting portions 421 can be adjusted according to the locking positions of the side plate engaging portions 422 , respectively. The distance between each other is to adjust the side support parts 421 to be against both sides of the user's body according to the body shape of the user, so that the user can still be affected by the side support parts 421 when the user's muscles are weak and tilted. Support, to achieve the purpose of good support when the user is sitting.

Besides, in order to make the user feel more comfortable when using the adjustable body support device 100 , the cross-sectional shapes of the side rest plates 42 of the adjustable body support device 100 are adapted to the differences of the user's body shape There are different angle designs, that is to say, the included angle of each side support portion 421 relative to the corresponding side plate connecting portion 422 is different during manufacture, so the adjustable body support device 100 is installed on the backs. When the lever 92 is used, each movable component 3 can be rotated around the corresponding pivot shaft 22 to match the included angle of each side support portion 421 to align with the engaging longitudinal groove of each side support portion 421 424 , improving the applicability of the adjustable body support device 100 for users of different body shapes. In addition, because the frame body 51 covers the body, and the fourth screw sets 53 can penetrate the frame body 51 and be locked at any position of the connecting transverse groove 411 , the back support frame 5 is installed in the The support structure 4 can adjust the position along the connecting transverse groove 411 , so that when the user falls to the front side and the left and right sides, the frame body 51 fixed on the support structure 4 prevents the user from falling off the wheelchair 9 easily. To achieve the purpose of good support and safety of the adjustable body support device 100, at the same time, the back support frame 5 can also adjust the locking position of the frame body 51 laterally, so as to adjust the back support according to the user's body shape and sitting posture The purpose of the installation position of the frame 5 can surely achieve the purpose of the present invention.

However, the above are only examples of the present invention, and should not limit the scope of implementation of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the patent specification are still included in the scope of the present invention. within the scope of the invention patent.

100: Body Support Device 1: Cohesive structure 2: Fixed components 21: Base 210: Displacement through hole 211: base body 212: base fixing block 213: Second screw group 214: limit hole 215: Limit screw 216: The first groove surface 217: The second connecting hole 218: Second groove surface 219: The third connecting hole 22: Pivot shaft 221: threaded hole 3: Active Components 31: Top seat 311: The first connection hole 312: Pivot hole 32: The first screw group 33: Fixing screws 4: Support structure 41: Back to the board 411: Connecting horizontal groove 42: Side panel 421: Side Support 422: Side plate joint 423: The third screw group 424: Connecting longitudinal slot 425: Fourth connecting hole 5: Back support frame 51: Frame 52: Fixed structure 53: Fourth screw group 9: Wheelchair 91: Seat 92: Back Bar

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a perspective view illustrating an embodiment of the adjustable body support device of the present invention applied to a wheelchair (only some components are shown); Fig. 2 is a partial exploded view corresponding to Fig. 1; Fig. 3 is an exploded view corresponding to Fig. 1, Fig. 2; FIG. 4 is a front view illustrating the connection relationship between the wheelchair and an engaging structure and a supporting structure of the embodiment; Fig. 5 is a right side view illustrating the connection relationship between the connecting structure, the supporting structure and the wheelchair; Fig. 6 is a plan view corresponding to Fig. 4, Fig. 5; and FIG. 7 is a top view similar to FIG. 6 , illustrating a variant embodiment of the engaging structure and the supporting structure in different usage states.

100: Adjustable Body Support Device 1: Cohesive structure 2: Fixed components 210: Displacement through hole 3: Active Components 4: Support structure 41: Back to the board 42: Side panel 421: Side Support 5: Back support frame 51: Frame 52: Fixed structure 53: Fourth screw group 9: Wheelchair 91: Seat 92: Back Bar

Claims (9)

An adjustable body support device, suitable for being installed on a wheelchair, the wheelchair includes a seat, and two back bars spaced apart from each other and erected on the top side of the seat, the adjustable body support device includes: two connecting structures, respectively Up and down displaceable and pivotally mounted on the back rods, each connecting structure includes a displacement through hole that is connected to the corresponding back rod; and a support structure, including a backrest for the user to abut against The backrest board, and two side backboards respectively connected to the left and right sides of the backrest board, the backrest board has at least one transversely extending engaging transverse groove, and the side backrest boards are respectively used to support the user's body On both sides, each side board has a side support portion extending forward from the side edge of the back board, a side board connecting portion for being fixed on the back board and connecting the side support portion, and a plurality of first Three screw sets, the side support parts of the side boards are respectively connected to the connecting structures, each side board connecting part has a plurality of fourth connecting holes aligned with the connecting transverse groove, the The third screw groups respectively penetrate the corresponding fourth connecting holes of the side plate connecting portion and the connecting transverse groove of the backrest plate, so that each side plate connecting portion can be detachably installed on the backrest plate, wherein , the support structure can adjust the height of the support structure relative to the seat with the movement of the connection structures, and the third screw groups of the side panels can penetrate from any position of the connection transverse groove, Therefore, the distance between the connecting portions of the side plates can be adjusted arbitrarily along the connecting transverse groove. The adjustable body support device as claimed in claim 1, wherein each side support portion has at least one longitudinally extending engaging longitudinal groove, and different height positions of each engaging longitudinal groove can be screwed and fixed by the corresponding engaging structure. The adjustable body support device of claim 1, wherein each side support has At least one connecting longitudinal groove extending longitudinally; each connecting structure includes a fixed component and a movable component connected to the fixed component, each fixed component has the displacement through hole, each movable component has a top seat and several A first screw group, each top seat has a plurality of first engaging holes aligned with the engaging longitudinal groove, and one end of the first screw group of each movable component penetrates through the corresponding engaging longitudinal groove and respectively extends from the corresponding engaging longitudinal groove. The first engaging holes are penetrated, so that the movable component can be detachably locked to the corresponding side support portion, wherein, the first screw groups of each movable component can be connected from any of the corresponding longitudinal grooves. The position is penetrated and fixed, so that the height of the support structure relative to the seat can be arbitrarily adjusted along the engaging longitudinal grooves. The adjustable body support device as claimed in claim 1, wherein each connecting structure includes a fixed component and a movable component laterally pivotally connected to the fixed component, and each fixed component has a base and a connection On the pivot shaft extending longitudinally on the base, each base has the displacement through hole, each movable component has a top seat connected to the corresponding side support portion, and each top seat has a longitudinal extension for the corresponding The pivot hole through which the pivot shaft penetrates, wherein each of the movable components can rotate relative to the corresponding fixed component with the corresponding pivot shaft as the axis, so as to drive the support structure to move laterally. The adjustable body support device as claimed in claim 4, wherein each movable component further has a fixing screw penetrating through the corresponding top seat, and the top side of each pivot shaft has a detachable fixing screw for the corresponding fixing screw The screw holes of the screw lock, wherein the fixing screws can be screwed into the screw holes respectively, so that the movable components cannot rotate relative to the fixed components respectively. The adjustable body support device as claimed in claim 1, wherein each engaging structure further comprises a limit hole which is communicated with the outer surface of the engaging structure and communicated with the displacement through hole, and a limit hole detachably penetrated through the limit hole. The limit screws of the position holes, these limit screws can be pressed against At the back rods, the engaging structures cannot be displaced relative to the back rods. The adjustable body support device according to claim 1, wherein each connecting structure includes a fixed component and a movable component connected to the fixed component, each fixed component has a base, and each base has a base body , a base fixing block and several second screw groups, each base main body has a first groove surface, and a plurality of second connecting holes passing through, each base fixing block has a corresponding first groove opposite to The second groove surface of the surface, and a plurality of through third connecting holes, each of the first groove surface and the corresponding second groove surface jointly define the displacement through hole, and the second screw groups of the bases respectively pass through The corresponding second engaging holes of the base body and the corresponding third engaging holes of the base fixing block are inserted into the corresponding third engaging holes of the base fixing block, so that each base can be detachably installed on the corresponding back rod. The adjustable body support device according to claim 1, further comprising a back support frame, the back support frame includes an arc-shaped frame body for covering the body, and a fixing structure disposed behind the frame body , and a plurality of fourth screw groups penetrating the fixing structure and the frame body and penetrating the connecting transverse groove, these fourth screw groups can penetrate into any position of the connecting transverse groove to enable the back support frame to be installed On the support structure, the position can be adjusted along the engaging transverse groove. An adjustable body support device, suitable for being installed on a wheelchair, the wheelchair includes a seat, and two back bars spaced apart from each other and erected on the top side of the seat, the adjustable body support device includes: two connecting structures, respectively Pivotably installed on the back bars; and a support structure, including a backrest plate for the back of the user to abut against, and two side backboards respectively connected to the left and right sides of the backrest plate, the The backrest board has at least one engaging transverse groove extending laterally, the side restboards are respectively used to support both sides of the user's body, and each siderest board has a side support extending forward from the side edge of the backrest board department, A side plate connecting portion and several third screw sets for being fixed on the backing plate and connecting the side support portion, each side support portion has at least one connecting longitudinal groove extending longitudinally, and each side plate connecting portion has several a fourth engaging hole aligned with the engaging transverse groove, the third screw groups of each side board respectively penetrate into the corresponding fourth engaging holes of the side board engaging portion and the engaging transverse hole of the backrest board grooves, so that each of the side plate engaging parts can be detachably installed on the backrest board, wherein, the different height positions of each of the engaging longitudinal grooves can be screwed and fixed by the corresponding engaging structure, so that the supporting structure is relative to the seat seat. The height of the joints can be adjusted arbitrarily along the connecting longitudinal grooves, and the third screw groups of each of the side boards can penetrate from any position of the connecting transverse grooves, so that the distance between the connecting parts of the side plates can be along the connecting parts. The horizontal groove can be adjusted arbitrarily.

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