TWM554785U - Chair with backrest tilt compensation - Google Patents

Description

Chair with backrest tilt compensation

The utility model relates to a chair set, in particular to a chair with tilting compensation of the seat back for adjusting the tilting angle of the seat back.

A general chair, such as a wheelchair, a medical seat or an electric scooter, etc., usually includes a seating unit for the user to ride on the buttocks, and a seat on the rear side of the seating unit for the user to rest on the back and head. Lying back against the unit. The seating unit has two left and right spaced seat bars, and the backrest unit has two left and right spaced apart ends, and the bottom ends are swingably connected to the back bars of the rear ends of the seat bars. In use, the backrest unit can be driven to adjust the tilt angle relative to the ride unit.

During the adjustment, since the riding unit is still in the fixed position, the user's buttocks are also kept in the original position, so when the backrest unit is tilted backward, the backs are respectively centered on the pivotal portion thereof. The swinging of the rod backwards also causes the user to lean back on the back. However, because the swinging pivot of the user's back is different from the swinging pivot of the pivotal joint of the backrest unit, the two are spaced apart, so The turning will cause the friction between the back of the user and the backrest unit to be lying relative to each other, and the friction phenomenon of the relative dislocation slip will occur, and the head will be tilted down and cannot be reliably leaned on the original position, which is not inconsistent. The ergonomic design also creates a feeling of friction and discomfort, so the design of the above chair has yet to be improved.

Accordingly, it is an object of the present invention to provide a chair with backrest tilt compensation that overcomes at least the disadvantages of the prior art.

Thus, the present invention has a seat back tilt compensation chair, comprising a seat device and a seat back device. The seat device includes a seating unit and two inner shelves respectively disposed on the left and right sides of the seating unit. The seatback device includes a backrest unit that is located on the rear side of the ride unit and extends upwardly, two compensation units that are respectively angularly connected to the left and right sides of the backrest unit and the inner frame, and two a first driving unit respectively disposed on the inner frame and respectively for driving the compensation units, each of the compensation units having a crank connecting the backrest unit and a bottom pivotably connecting the crank and corresponding a rocker on a lower side of the inner frame, and a link pivotably connected to a front side of the crank and an upper side of the corresponding inner frame, the crank having an indication portion adjacent to a rear side of the seating unit. The seat back device is movable relative to the seat device between a back-up position in which the backrest unit is upright, and an anticline position in which the backrest unit is inclined rearward, the seat back device being in the back-up position And the marked portion of the crank of each of the compensation units is behind the seating unit, and the indicator portion of the crank of each of the compensation units is rearward and downward when the backrest device is in the anticline position .

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , in a first embodiment of the present invention, the chair can be a wheelchair, a medical seat, an electric scooter, a leisure chair or an office chair, etc., in the first embodiment. In the example, a wheelchair is taken as an example. The chair comprises a base unit 1, a seat unit 2, and a seat back unit 3.

The base device 1 includes two left and right outer shelves 11 , two front wheels 12 rotatably disposed on the front sides of the outer shelves 11 , and two rotatably disposed rear sides of the outer shelves 11 . The rear wheel 13 Each of the outer shelves 11 has an upper side bar 111 and a lower side bar 112 spaced apart from each other, a front side bar 113 connecting the front side edge 111 and the front edge of the lower side bar 112, and the front wheel 12 is rotatably disposed. a rear side bar 114 connecting the upper side bar 111 and the rear edge of the lower side bar 112 and rotatably provided for the rear wheel 13, and a front arc plate spaced back and forth between the upper side bar 111 and the lower side bar 112 115 with a rear arc plate 116. The front arc plate 115 defines a leading channel 117 extending from the lower rear end to the front upper end. The rear arc plate 116 defines a rear guide groove 118 that extends from the rear upper end toward the front lower end. The leading groove 117 and the rear guiding groove 118 are curved in a circumferential direction along the circumference of the same circle.

The seat device 2 is swingably disposed between the outer shelves 11 of the base device 1. The seat device 2 includes a seating unit 21 for the user to ride on the buttocks, and two seat units are respectively disposed on the seat unit An inner frame 22 below the left and right sides of the 21 and respectively located inside the outer frame 11 of the base device 1 , and two front and rear spaced and foldable supports between the seating unit 21 and the inner frame 22 a connecting unit 23, two pivoting units 24 for swinging the inner frames 22 to the outer shelves 11, respectively, and two respectively disposed on the outer shelves 11 and respectively for driving the inner sides The second drive unit 25 of the frame 22.

The seating unit 21 has two seat bars 211 extending longitudinally forward and rearwardly disposed above the inner frame 22, and a seat cushion 212 disposed between the seat bars 211. Each of the inner frame 22 has an upper frame bar 221 and a lower frame bar 222 spaced apart from each other, a front frame bar 223 connecting the upper frame bar 221 and the front edge of the lower frame bar 222, and a connecting frame 221 and the upper frame bar 221 a rear frame rod 224 at the rear edge of the lower rod 222, a front guide 225 disposed on the lower frame rod 222 and slidably extending into the corresponding front guide groove 117 of the outer frame 11, one disposed behind a rod 224 and slidably extending into a corresponding rear guide 226 of the rear guide groove 118 of the outer frame 11 and a limiting member disposed at a joint of the upper frame rod 221 and the rear frame rod 224 227.

Each of the connecting units 23 has two struts 231 extending obliquely, and the struts 231 are cross-connected in an X shape, and are connected to the seat bars 211 and the lower frame bars 222 when the struts 231 are mutually When the opening is extended, the inner frames 22 can be separated from each other to expand the seating unit 21, and when the struts 231 are folded into each other, the inner frames 22 can be brought adjacent to each other to fold the seating unit 21.

Each of the pivoting units 24 is pivotally connected to the upper side bar 111 of the outer frame 11 and the upper frame bar 221 of the inner frame 22, and includes an outer pivoting pole 241 fixedly connected to the upper side bar 111, An inner pivoting lug 242 fixedly connected to the upper mast 221, and a pivot 243 pivoting the outer pivoting lug 241 and the inner pivoting lug 242 and passing through the center of the front guiding slot 117 and the rear guiding slot 118 The inner frame 22 is pivoted relative to the outer frame 11 about the pivot 243. Of course, in other variations of the first embodiment, the outer pivot 241 and the inner pivot 242 may be omitted. The pivot 243 directly pivots the upper rod 111 and the upper rod 221 together. Each of the second driving units 25 is a gas bar that is swingably disposed between the lower frame 222 of the inner frame 22 and the upper side bar 111 of the outer frame 11. Of course, other driving structures may be used in design. .

The backrest device 3 includes a backrest unit 31 located on the rear side of the seating unit 21 and lie on the back of the user's back and the head, and two left and right sides of the backrest unit 31 are respectively angularly adjustable. A compensation unit 4 between the inner frame 22 and two first drive units 32 respectively disposed on the inner frame 22 and for driving the compensation units 4, respectively. The backrest unit 31 has two back bars 311 spaced apart from each other and extending from the rear of the seat bars 211, and a back pad 312 laid between the back bars 311. Each of the first driving units 32 is a gas bar that is swingably disposed between the corresponding upper frame 221 of the inner frame 22 and the corresponding compensation unit 4, and may of course be other drives. structure.

Each of the compensation units 4 has a crank 41 that connects the backrest unit 31, a rocker 42 that swingably connects the bottom of the crank 41 and the corresponding lower side of the inner frame 22, and one for pivoting the a crank 41, the rocker 42 and the adjusting member 43 corresponding to the first driving unit 32, a connecting rod 44 pivotably connecting the front side of the crank 41 and the corresponding upper side of the inner frame 22, and a lever The connecting member 45 of the crank 41 and the connecting rod 44 is pivotally connected.

The crank 41 has a marking portion 411 adjacent to the rear side of the seating unit 21, a fixing portion 412 located directly above the marking portion 411 and fixedly connecting the bottoms of the respective back bars 311, one position The connecting portion 411 is slidably connected to the connecting portion 413 of the rocking rod 42 and the corresponding first driving unit 32, a connecting portion 414 between the indicating portion 411 and the connecting portion 413, and a connecting portion 414 The positioner 411 is located below the indicator portion 411, and the corresponding limiting member 227 of the inner frame 22 is slidably inserted into the limiting slot 415.

The rocker 42 has a lower rocking portion 421 that swingably connects the lower frame bar 222 of the inner frame 22, and an upper rocking portion 422 that swingably connects the coupling portion 413 of the crank 41, and An adjusting hole 423 is disposed between the upper rocking portion 422 and the lower rocking portion 421 along the longitudinal direction thereof, and the rear side of the upper rocking portion 422 of the rocker 42 and the connecting portion 413 of the crank 41 The angle θ between the sides is less than 180 ∘. Of course, in other variations of the first embodiment, the angle θ may also be equal to 180 ∘. The adjusting member 43 is disposed on the connecting portion 413 of the crank 41, and is selectively connected to the adjusting holes 423 of the rocker 42. The adjusting member 43 can be connected to the crank 41, the rocker 42 and the phase. In addition to the first drive unit 32, the length and angle of connection between the crank 41 and the rocker 42 can be adjusted depending on the position of the adjustment hole 423 to be assembled.

The link 44 has a front connecting portion 441 that swingably connects the corresponding upper frame 221 of the inner frame 22, and a connecting portion 414 that is pivotally connected to the lower portion 441 and pivotably coupled to the crank 41. The rear connecting portion 442 and a plurality of connecting holes 443 are disposed between the front connecting portion 441 and the rear connecting portion 442 at intervals along the longitudinal direction thereof. The connecting member 45 is disposed on the connecting portion 414 of the crank 41 and is selectively connected to the connecting holes 443 of the connecting rod 44. The connecting member 45 is not only connectable to the crank 41 and the connecting rod 44, The length and angle of connection of the crank 41 to the link 44 can also be adjusted depending on the position of the connecting hole 443 that is selected for assembly.

In the normal use state, the seat back device 3 is in a straight position with respect to the seat device 2 in an upright position of the backrest unit 31, and the seat device 2 is positioned relative to the base device 1 A sitting position in which the seating unit 21 is laid flat. When the seat back device 3 is in the back position, each of the first driving units 32 is in an extended state, and the indicator portion 411 of each of the cranks 41 is adjacent to the rear side of the rear side of the seating unit 21, so that each The rocker 42 is inclined upward and rearward. When the seat device 2 is in the sitting position, each of the second driving units 25 is in an extended state, and each of the guiding members 225 is located at a rear lower end of the corresponding leading groove 117, and each of the rear guiding members 226 Positioned at the corresponding upper rear end of the rear guide groove 118.

As shown in FIG. 4, when it is desired to adjust the backrest device 3 to tilt backwards, each of the first driving units 32 is driven to be in a shortened state, and each of the rockers 42 is swung upward and forward. At the same time, the crank 41 is connected to the link 44 to perform a series of swings, so that the indicator portion 411 of the crank 41 is moved backward and downward to the lower rear side of the rear side of the seating unit 21, and the back is made The unit 31 is tilted rearward and downwardly, so that the seat back device 3 can be moved relative to the seat device 2 from the back straight position of FIG. 3 to an anticline position of FIG. The angle of the angle θ between the rocker 42 and the crank 41 is smaller than the angle of the angle θ of the seat back device 3 in the back position of FIG. Of course, since the angle of the tilt is different and the shape of the chair is different, when the seat back device 3 is moved to the anticline position, the indicator portion 411 of the crank 41 may also move to the rear of the rear side of the seat unit 21. Or below, so it is not limited to the first embodiment. It is worth mentioning that when the back cover device 3 is moved between the back straight position of FIG. 3 and the anticline position of FIG. 4, the opposite ends of the limit slot 415 of each of the cranks 41 are also Alternating against the corresponding stop member 227 can be used to limit the swing range of each of the cranks 41.

As shown in FIG. 5, when the seat device 2 is adjusted to be raised upward and upward, as long as each of the second driving units 25 is driven to be shortened, the corresponding inner frame 22 is driven together. The riding unit 21 and the connected components are tilted forward and upward with the corresponding pivoting unit 24 as a center, so that the seat device 2 is moved relative to the base device 1 from the sitting position of FIG. 4 to In a sitting position of Fig. 5, the user can adjust the posture of lying down to make the body relax properly. At the same time, each of the guiding members 225 is also moved to the front upper end of the corresponding leading groove 117, and each of the rear guiding members 226 is also moved to the front lower end of the corresponding rear guiding groove 118, that is, the seat. When the device 2 is moved between the sitting position of FIG. 4 and the sitting position of FIG. 5, each of the leading members 225 is also moved between the corresponding ends of the leading groove 117, and each of the rear portions 117 The guide 226 also moves between the corresponding ends of the rear guide groove 118. It should be noted that, in use, it is also possible to control the seat device 2 to be tilted backwards and downwards relative to the base device 1 to facilitate guiding the user to leave the chair forward.

It should be noted that, in the adjustment, the seat device 2 and the seat back device 3 can be adjusted separately. For example, as shown in FIG. 4, only the inclination angle of the seat back device 3 relative to the seat device 2 can be adjusted. Or adjusting only the tilting angle of the seat device 2 relative to the base device 1, as shown in FIG. 5, not only adjusting the tilt angle of the seat back device 3 relative to the seat device 2, but also adjusting the angle The angle of inclination of the seat device 2 relative to the base device 1.

It is further explained that in the process of adjusting the backrest device 3 to be inclined backwards, the compensation unit 4 drives the backrest unit 31 to swing backwards and downwards, thereby adjusting the compensation and the user's swing amplitude. Different arc gaps are used to conform to the swinging amplitude of the user's body, so that the user's back and head are stably tilted backwards without the relative misalignment of the backrest unit 31. Always maintain the best contact state, there is no feeling of friction and discomfort, and there is no need to move the body to adjust the reclining position, so it can improve the comfort when lying on the back.

Referring to Figure 6, the second embodiment of the present invention is constructed substantially the same as the first embodiment, with the difference that the connecting portion 414 of the crank 41 of each of the compensating units 4 is changed in position so that the connecting portion 414 is moved over the indicator portion 411, and the shape of the link 44 is also changed, so that the rear connection portion 442 is located above the front connection portion 441. By the above change, when the seatback device 3 is moved from the back straight position of FIG. 6 to the anticline position of FIG. 7, it can be tilted more backwards and downwards, more ergonomically compensated, and can have better Effect.

In summary, the seat back device 3 of the chair of the present invention is provided with the compensation unit 4 to be connected with the seat device 2, and can be compensated by the adjustment of the compensation unit 4 when used, so that the backrest unit 31 can be tilted backwards and downwards, ergonomically compensated, allowing the user's back and head to rest stably and without slipping in the original position, without the phenomenon of misalignment and friction, and more comfortable when lying on the back. Therefore, the purpose of this new type can be achieved.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

1‧‧‧Base unit
11‧‧‧Outside frame
111‧‧‧Upper pole
112‧‧‧lower pole
113‧‧‧ Front pole
114‧‧‧back bar
115‧‧‧ front arc plate
116‧‧‧ rear arc plate
117‧‧‧ front channel
118‧‧‧ rear guide slot
12‧‧‧ front wheel
13‧‧‧ rear wheel
2‧‧‧ seat seat device
21‧‧‧Riding unit
211‧‧‧ seat rod
212‧‧‧Cushion
22‧‧‧Inside frame
221‧‧‧Upper pole
222‧‧‧Under the pole
223‧‧‧ front pole
224‧‧‧ rear pole
225‧‧‧Front
226‧‧‧ rear guide
227‧‧‧Limited parts
23‧‧‧ Connection unit
231‧‧‧ poles
24‧‧‧ pivot unit
241‧‧‧ external pivot
242‧‧‧ inner ear
243‧‧‧ pivot
25‧‧‧Second drive unit
3‧‧‧Seat back device
31‧‧‧back unit
311‧‧‧ Back rod
312‧‧‧ Back pad
32‧‧‧First drive unit
4‧‧‧Compensation unit
41‧‧‧ crank
411‧‧‧Marking Department
412‧‧‧Fixed Department
413‧‧•Connected Department
414‧‧‧Connecting Department
415‧‧‧ Limit slot
42‧‧‧ rocker
421‧‧‧ Lower Shake
422‧‧‧Upper Shake
423‧‧‧Adjustment hole
43‧‧‧Adjustment
44‧‧‧ Connecting rod
441‧‧‧ Front Office
442‧‧‧Lianlian
443‧‧‧connection hole
45‧‧‧Connecting parts

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a perspective view illustrating a first embodiment of the present invention; Figure 2 is an incomplete perspective An exploded view of a base device, a seat device, and a partial connection structure of a seat back device of the first embodiment; FIG. 3 is an incomplete side view illustrating the seat back of the first embodiment The device is positioned in a back-right position relative to the seat device, the seat device being in a sitting position relative to the base device; FIG. 4 is a view similar to FIG. 3 illustrating the seat back of the first embodiment The device is positioned in an anticline position relative to the seat device, the seat device being positioned in the sitting position relative to the base device; FIG. 5 is a view similar to FIG. 4 illustrating the seat back of the first embodiment Positioning the device in the anticline position relative to the seat device, the seat device being in a seated position relative to the base device; FIG. 6 is an incomplete side view illustrating a second embodiment of the chair of the present invention Example of the seat back device It means in the seat back position in the straight position; and FIG. 7 is a view similar to Figure 6, illustrating the backrest of the second embodiment of the apparatus with respect to the bit position in the seat means anticline.

1‧‧‧Base unit

11‧‧‧Outside frame

111‧‧‧Upper pole

112‧‧‧lower pole

113‧‧‧ Front pole

114‧‧‧back bar

115‧‧‧ front arc plate

25‧‧‧Second drive unit

3‧‧‧Seat back device

31‧‧‧back unit

311‧‧‧ Back rod

32‧‧‧First drive unit

4‧‧‧Compensation unit

41‧‧‧ crank

116‧‧‧ rear arc plate

117‧‧‧ front channel

118‧‧‧ rear guide slot

2‧‧‧ seat seat device

22‧‧‧Inside frame

221‧‧‧Upper pole

222‧‧‧Under the pole

223‧‧‧ front pole

224‧‧‧ rear pole

225‧‧‧Front

226‧‧‧ rear guide

227‧‧‧Limited parts

24‧‧‧ pivot unit

241‧‧‧ external pivot

242‧‧‧ inner ear

243‧‧‧ pivot

411‧‧‧Marking Department

412‧‧‧Fixed Department

413‧‧•Connected Department

414‧‧‧Connecting Department

415‧‧‧ Limit slot

42‧‧‧ rocker

421‧‧‧ Lower Shake

422‧‧‧Upper Shake

423‧‧‧Adjustment hole

43‧‧‧Adjustment

44‧‧‧ Connecting rod

441‧‧‧ Front Office

442‧‧‧Lianlian

443‧‧‧connection hole

45‧‧‧Connecting parts

Claims (10)

A chair having a seat back tilt compensation, comprising: a seat device comprising a seating unit, and two inner frames respectively disposed on left and right sides of the seating unit; and a seat back device including a seat a backrest unit extending on the rear side of the unit and extending upwardly, two compensation units respectively connecting the left and right sides of the backrest unit and the inner side frame, and two inner side frames respectively a first driving unit for driving the compensation units, each of the compensation units having a crank connecting the backrest unit, a swingingly connecting the bottom of the crank and a corresponding lower side of the inner frame a lever, and a link pivotably coupled to the front side of the crank and the corresponding upper side of the inner frame, the crank having an indicator portion adjacent to a rear side of the seating unit; the seat back device relative to the seat The device moves between a back-up position in which the backrest unit is upright and a back-tilt position in which the backrest unit is tilted rearward, and the seat back device is in the back-right position The marked portion of the crank of each of the compensation unit behind the riding unit, the seat back means when the anticline position, the mark of the crank portion of each of the compensation unit and the rearwardly displaced downward. The chair with backrest tilt compensation according to claim 1, wherein each of the inner frame has an upper frame and a lower frame, and the crank of each of the compensation units further has a position a fixing portion directly connected to the marking portion and fixedly connected to the backrest unit, and a lower portion located before the marking portion, and swingably connecting the connecting portion of the rocking rod and the corresponding first driving unit, The rocker has a lower rocking portion that swingably connects the lower frame of the corresponding inner frame, and an upper rocking portion that swingably connects the coupling portion of the crank, the upper rocking portion of the rocker The angle between the side and the rear side of the connecting portion of the crank is less than or equal to 180 ∘, and the angle of the angle of the seat back device in the anticline position is smaller than the angle of the angle of the seat back device in the back straight position. The chair with backrest tilt compensation according to claim 2, wherein the crank of each of the compensation units further has a connecting portion located below the indicating portion, the connecting rod having a swingable connection corresponding to a front connecting portion of the upper frame of the inner frame, and a rear portion of the connecting portion below the front connecting portion and pivotably connecting the crank. The chair with backrest tilt compensation according to claim 2, wherein the crank of each of the compensation units further has a connecting portion located above the indicating portion, the connecting rod having a swingable connection corresponding to a front portion of the upper frame of the inner frame, and a rear portion of the connecting portion above the front portion and pivotably coupled to the crank. The chair with backrest tilt compensation according to claim 3 or 4, wherein the crank of each of the compensation units further has a limit slot located below the indicator portion, and each of the inner frame has a Extending into the corresponding limiting member of the limiting slot, when the seat back device moves between the back straight position and the anticline position, the opposite ends of the limiting slot of each of the cranks are alternately Corresponding to the corresponding limit member, it can be used to limit the swing range of each of the cranks. The chair with backrest tilt compensation according to claim 3 or 4, wherein the link of each of the compensation units has a plurality of connections spaced apart between the front joint and the rear joint The holes, each of the compensation units further having a connecting member disposed at the connecting portion of the crank and selectively connected to the connecting holes of the connecting rod. The chair with backrest tilt compensation according to claim 3 or 4, wherein the rocker of each of the compensation units has a plurality of adjustments disposed between the upper rocker and the lower rocker at intervals The holes, each of the compensation units further having an adjustment member disposed at the coupling portion of the crank and selectively connected to the adjustment holes of the rocker. The chair with backrest tilt compensation according to claim 1, wherein the chair further comprises a base device, wherein the base device comprises two outer frames respectively disposed outside the inner frame of the seat device. The seat device further includes two pivoting units for swingably connecting the inner frames to the outer frames, and two respectively disposed on the outer shelves and respectively for driving the inner frames a second driving unit, the seat device may be centered on the pivoting unit with respect to the base device, in a sitting position in which the seating unit is laid flat, and a seated posture in which the riding unit is inclined Move between positions. The chair with backrest tilt compensation according to claim 8, wherein each of the outer frame has a front and rear spacing, and a front guiding groove extending from the corresponding pivoting unit a rear guide groove, each of the inner frame of the seat device having a front guide member slidably extending into each of the front guide grooves, and a slidably extending rearward of each of the rear guide grooves a guide member, each of the front guide members also moves between opposite ends of the front guide groove when the seat device moves between the sitting position and the sitting position, and each of the rear guides also It will move between the corresponding ends of the rear guide groove. The chair with backrest tilt compensation according to claim 9, wherein the base device further comprises two front wheels respectively rotatably disposed on a front side of the outer shelves, and two rotatably disposed on the front side respectively The rear wheels on the rear side of the outer frame.