Chair device

Abstract

To provide a chair device capable of holding a user's legs by reducing a physical burden on the user.SOLUTION: A chair device 1 comprises: a chair body 50 that has a seat part 16; a holding member 43 that has a first end and a second end 43b and that supports the lower leg P3 of a user P1; and a support member 41 that is provided in the chair body and that can be expanded / contracted in a longitudinal direction below the seat part. The first end of the holding member is attached to the chair body, and the second end 43b of the holding member can be attached to / detached from the support member.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a chair apparatus. [Background technology]

[0002] Traditionally, nursing care chairs (chair devices) for bathing assistance have been used in elderly care facilities and the like (see, for example, Patent Documents 1 to 3). These nursing care chairs are equipped with a retractable footrest mechanism as a means for the user of the nursing care chair to place their feet on and safely straddle the bathtub. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-046049 A [Patent Document 2] JP 2017-086795 A [Patent Document 3] JP 2018-130353 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, users who have stiff leg joints due to illness or other reasons often have difficulty placing their feet on the footrest mechanism. In such cases, the caregiver must move the nursing chair toward the bathtub while holding the user's legs, which places a physical burden on the user.

[0005] The present invention has been made in consideration of the above problems, and has an object to provide a chair device capable of supporting the user's feet while reducing the physical burden on the user. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention proposes the following means. (1) Aspect 1 of the present invention is a chair device comprising: a chair body having a seat portion; a retaining member having a first end and a second end portion and supporting the lower legs of a seated person; and a support member provided on the chair body and below the seat portion and capable of expanding and contracting in the front-to-rear direction of the seat portion, wherein the first end of the retaining member is attached to the chair body and the second end of the retaining member is detachable from the support member.

[0007] In this invention, for example, a user can sit on the seat of a chair body placed on a support surface. Then, the support member is stretched in the front-rear direction, and the second end of the holding member is attached to the support member. Therefore, for example, the holding member in a state in which the second end is stretched relative to the first end can be supported by the support member. For example, by placing the lower leg (calf) of the user on the holding member, the user's lower leg can be held over a relatively wide area, reducing the physical burden on the user. On the other hand, when the user is not using the holding member, the holding member can be separated from the supporting member by releasing the second end portion of the holding member from the supporting member, and the supporting member can be put into a contracted state in the front-rear direction.

[0008] (2) Aspect 2 of the present invention may be a chair device as described in (1), comprising an interlocking portion attached to the second end of the retaining member, and an interlocking portion attached to the support member and detachable from the interlocking portion. In this aspect of the invention, the second end of the holding member and the support member can be attached to and detached from each other by attaching and detaching the locked portion and the locking portion to and from each other.

[0009] (3) A third aspect of the present invention is a chair device comprising a chair body having a seat portion, a retaining member having a first end and a second end portion and supporting the lower legs of a user, and a support member provided on the chair body and expandable and contractible in the front-to-back direction below the seat portion, wherein the first end of the retaining member is attached to the chair body and the second end of the retaining member is attached to the support member.

[0010] In this invention, for example, a user can sit on the seat of the chair body placed on the support surface. Then, the support member is stretched in the front-rear direction. Therefore, for example, the support member can support the holding member in a state in which the second end is stretched relative to the first end. For example, by placing the lower leg (calf) of the user on the holding member, the user's lower leg can be held over a relatively wide area, reducing the physical burden on the user. On the other hand, when the user is not using the holding member, the support member can be contracted in the front-rear direction.

[0011] (4) A fourth aspect of the present invention may be the chair apparatus according to (3), wherein the holding member is capable of being stored below the seat portion. In this invention, the holding member when not holding the user's feet can be stored below the seat, thereby preventing the holding member in this state from becoming an obstacle to the user, etc.

[0012] (5) A fifth aspect of the present invention may be a chair device described in any one of (1) to (4), comprising two support members, each of which has a support body and a movable member that is movable in the longitudinal direction of the support body relative to the support body, and which is provided with connecting members respectively connected to the two movable members. In the present invention, since the two movable members are integrated by the connecting member, the lengths of the two support members can be adjusted in the same manner as each other. Effect of the Invention

[0013] The chair device of the present invention can support the user's feet while reducing the physical burden on the user. [Brief description of the drawings]

[0014] [Figure 1] 1 is a plan view of a bathing care system in which a care chair according to a first embodiment of the present invention is used. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a side view of a main part of the nursing chair. [Figure 4] 4 is a cross-sectional view taken along line A1-A1 in FIG. 3. [Diagram 5] FIG. 2 is a perspective view of a holding portion of the nursing chair. [Figure 6] 11 is a perspective view of a main part illustrating a procedure for a user to take a bath using the bathing assistance system. FIG. [Figure 7] 11 is a perspective view of a main part illustrating a procedure for a user to take a bath using the bathing assistance system. FIG. [Figure 8] FIG. 11 is a perspective view of a main part of a nursing chair according to a second embodiment of the present invention. [Figure 9] 4 is a perspective view of a main part for explaining the operation of the nursing chair. FIG. [Figure 10] FIG. 11 is a side view of a main part of a nursing chair according to a third embodiment of the present invention. [Figure 11] 11 is a side view of a main part for explaining the operation of the nursing chair. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] (First embodiment) DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a chair device according to the present invention will be described below with reference to Figs. 1 to 7, taking as an example a case in which the chair device is a care chair for bathing assistance. As shown in Fig. 1, a care chair 1 of this embodiment is used together with a rail unit 100. The care chair 1 and the rail unit 100 constitute a bathing care system 2. First, the bathtub 150 to which the rail unit 100 is attached will be described below.

[0016] Bathtub 150 is box-shaped with an open top, and includes bottom wall 151 and peripheral wall 156. The space surrounded by these walls 151, 156 serves as a reservoir. Bottom wall 151 is formed in a rectangular plate shape in plan view. That is, bottom wall 151 has two long sides and two short sides in plan view. Bottom wall 151 may also have a square shape in plan view. The peripheral wall 156 has two first side walls 157A, 157B and two second side walls 158A, 158B. The first side walls 157A, 157B and the second side walls 158A, 158B are each formed in a plate shape.

[0017] The first side walls 157A, 157B extend upward from the two long sides of the bottom wall 151. Here, "A extends to B" means that the angle between A and B is within 30 degrees. More preferably, the angle is within 15 degrees. The second side walls 158A, 158B extend upward from the two short sides of the bottom wall 151. In bathtub 150, on the opposite side of first side wall 157A to first side wall 157B, a washing area 160 where a user or the like washes his or her body is arranged.

[0018] Next, the rail unit 100 will be described. The rail unit 100 and the parts of the nursing chair 1 other than the holding part 40 described later are known configurations disclosed in, for example, JP 2021-029617 A. Therefore, only the outline of them will be described. The rail unit 100 includes a first fixing device 101A, a second fixing device 101B, and a second rail member 102. The first fixture 101A is disposed along the first side wall 157A and is fixed to the first side wall 157A. The second fixture 101B is disposed along the first side wall 157B and is fixed to the first side wall 157B. For example, a cross section perpendicular to the longitudinal direction of second rail member 102 is formed into a C-shape that opens upward. Second rail member 102 extends along second side wall 158A and is disposed so as to straddle fixtures 101A and 101B.

[0019] Next, the nursing chair 1 will be described. 2, the nursing chair 1 is supported on a support surface F1 such as a floor surface. The support surface F1 extends along a horizontal plane. The forward direction X1, the rear direction X2, the right direction Y1, and the left direction Y2 are defined based on the user P1 (see FIG. 3) seated on the nursing chair 1. The forward direction X1, the rear direction X2, the right direction Y1, and the left direction Y2 are oriented along the support surface F1. The direction including the forward direction X1 and the rear direction X2 is referred to as the front-rear direction, and the direction including the right direction Y1 and the left direction Y2 is referred to as the left-right direction. The nursing chair 1 includes a chair unit 10, a main body 20, a base 30, and a holding part 40. The chair unit 10, the main body 20, and the base 30 constitute a chair body 50.

[0020] As shown in FIG. 3, the chair unit 10 includes a support 11, a chair 12, and a fixing mechanism (not shown). The support 11 has an L-shape when viewed from the right Y1. The chair 12 is movable on the support 11 . As shown in FIGS. 2 and 3, the chair 12 has a seat portion 16, a backrest portion 17, and two grip bars 18. The seat portion 16 extends in the front-rear direction. A user P1 sits on the seat portion 16 (resists; see FIG. 3). The backrest 17 extends in a direction between the upper and rearward directions X2 from the rear end of the seat 16. The seat 16 is attached to a chair body 50. In this example, the two grip bars 18 are attached to the backrest portion 17. The two grip bars 18 are arranged so as to sandwich the backrest portion 17 in the left-right direction. The fixing mechanism is a mechanism for fixing the chair 12 on the support 11.

[0021] The main body 20 has a built-in motor. The main body 20 supports the chair unit 10. The motor can move the chair unit 10 in the up and down directions.

[0022] As shown in FIG. 2, the base 30 has a base portion 31, a first rail portion 32, and a second support 33. The base 31 has a plurality of wheels 36. The plurality of wheels 36 are supported on a support surface F1. That is, the chair body 50 is supported on the support surface F1. The first rail portion 32 extends in the left-right direction. A cross-sectional shape of the first rail portion 32 perpendicular to the left-right direction is the same as a cross-sectional shape of the second rail member 102 of the rail unit 100 perpendicular to the longitudinal direction. The main body portion 20 fits into the first rail portion 32 of the base 30 and the second rail member 102 of the rail unit 100. The motor can move the main body portion 20 along the first rail portion 32 and the second rail member 102. The second support 33 is attached to the base 31. The second support 33 supports the first rail portion 32 from below the first rail portion 32.

[0023] 3 to 5, the holding portion 40 has two support members 41, two locking portions 49, a connecting member 42, a holding member 43, two locked portions 44, and a support portion 45. In addition, in Fig. 5, the two support members 41, the two locking portions 49, and the connecting member 42 are indicated by two-dot chain lines. As shown in Fig. 5, the two support members 41 are disposed at a distance from each other in the left-right direction. As shown in Fig. 3 to Fig. 6, each support member 41 has a support body 47, a movable member 48, and a positioning portion (not shown). In this example, the support body 47 and the movable member 48 are each formed in a rod shape (shaft shape). More specifically, the support body 47 and the movable member 48 are each formed in a square tube shape. The support body 47 and the movable member 48 each extend in the front-rear direction. In this example, the rear end X2 of the support body 47 is attached (provided) to the support 11 (chair body 50). The support body 47 is disposed below the seat 16. The rear end X2 of the support body 47 may be attached to the seat portion 16.

[0024] At least the rear X2 portion of the movable member 48 is disposed within the support body 47. The movable member 48 is movable relative to the support body 47 in the longitudinal direction (front-rear direction) of the support body 47. That is, the support member 41 is extendable and contractable in the longitudinal direction. The support member 41 is extendable and contractable in the longitudinal direction below the seat 16. Each support member 41 can be switched between an extended state and a retracted state. In the extended state, the overlapping portion between the support body 47 and the movable member 48 in the longitudinal direction is relatively small, and the support member 41 is stretched in the longitudinal direction. On the other hand, in the retracted state, the overlapping portion between the support body 47 and the movable member 48 in the longitudinal direction is relatively large, and the support member 41 is contracted in the longitudinal direction.

[0025] The positioning portion has a known configuration and can fix the position of the movable member 48 relative to the support portion main body 47 or release this fixation by mechanical engagement or the like. The shapes of the locking portion 49 and the locked portion 44 are not limited as long as the locking portion 49 is detachable from the locked portion 44. As shown in Fig. 6, for example, the locking portion 49 is formed in a rod shape and is disposed at the front X1 end of the movable member 48. Each locking portion 49 protrudes toward the inside in the left-right direction of the two movable members 48. The locking portion 49 is attached to the movable member 48 of the support member 41. That is, of the two movable members 48 arranged in the left-right direction, the locking portion 49 protrudes from the movable member 48 arranged on the right side Y1 toward the left side Y2, and the locking portion 49 protrudes from the movable member 48 arranged on the left side Y2 toward the right side Y1.

[0026] The connecting member 42 is formed in a rod shape and extends in the left-right direction. The connecting member 42 is disposed between the movable members 48 of the two support members 41. Both ends of the connecting member 42 in the left-right direction are connected to the two movable members 48, respectively.

[0027] As shown in Fig. 5, the holding member 43 is formed in a sheet shape (thin plate shape). The holding member 43 is flexible. The thickness of the holding member 43 is preferably 50 mm or less. In this embodiment, the holding member 43 is formed of, for example, a polyester resin cloth. The holding member 43 may be configured in a mesh shape. By configuring it in this way, the breathability of the holding member 43 is improved. The holding member 43 extends in the front-rear direction. A first end 43a of the holding member 43 on the rear side X2 is wrapped around the outer circumferential surface of the support portion 45. In the holding member 43, the second end 43b, which is the end opposite to the first end 43a in the front-rear direction, extends further forward X1 than the first end 43a. More specifically, the second end 43b extends further in a direction between the downward direction and the forward direction X1 (hereinafter, referred to as diagonally forward and downward) than the first end 43a. Thus, the retaining member 43 has a first end 43a and a second end 43b.

[0028] For example, the locked portions 44 are formed in a cylindrical shape. The two locked portions 44 are attached to the second end portion 43b of the holding member 43 with a gap therebetween in the left-right direction. The two locked portions 44 are attached to each end portion in the left-right direction of the holding member 43. Each locked portion 44 is disposed so that its axis is aligned in the left-right direction. The locking portion 49 is attached to the locked portion 44 by inserting the locking portion 49 into the locked portion 44. On the other hand, the locking portion 49 is released from the locked portion 44 by pulling the locking portion 49 out from within the locked portion 44. As described above, the locking portion 49 is attachable to and detachable from the locked portion 44. When the retaining member 43 is in a state in which the second end 43b of the retaining member 43 is extended diagonally forward and downward relative to the first end of the retaining member 43 (hereinafter referred to as the extended state), the retaining portions 49 are attached to the respective retained portions 44. As described above, the second end 43b of the holding member 43 is attachable to and detachable from the movable member 48 of the support member 41. The second end 43b of the holding member 43 is attachable to and detachable from the two support members 41 at the position X1 forward of the first end 43a.

[0029] 5, the support portion 45 is formed in a rod shape and is disposed so as to extend in the left-right direction. The support portion 45 is attached to the seat portion 16 of the chair 12 by a hanging device or the like (not shown) (see FIG. 3). The support part 45 and the holding member 43 are configured like a known roller screen. A winding spring (not shown) is preferably attached to the support part 45. The winding spring biases the holding member 43 so that it is wound around the support part 45. The support portion 45 supports the holding member 43 .

[0030] When the two locking portions 49 are released from the two locked portions 44, the biasing force of the winding spring causes almost the entire holding member 43 to be wound around the support portion 45 (hereinafter referred to as the wound state).

[0031] A first end 43a of the holding member 43 is attached to the seat 16 (chair body 50) of the chair 12 via a support part 45 and a hanging device. Note that the first end 43a of the holding member 43 may be attached directly to the chair body 50 via the support part 45, or may be attached to the supporting member 41, etc. For example, the two support members 41, the connecting member 42, and the two locked portions 44 can be formed from stainless steel pipe material or the like.

[0032] Next, a procedure for the user P1 to take a bath using the bathing care system 2 configured as above will be described. The rail unit 100 is attached to the bathtub 150 in advance, and a certain amount of hot water (not shown) is placed in the bathtub 150. In the care chair 1, the two support members 41 are in the retracted state, and the holding member 43 is in the wound and stored state. In the nursing chair 1, the caregiver moves the chair unit 10 downwards using the main body 20. As shown in FIG. 6, the two support members 41 are brought into an extended state. As shown in FIG. 7, the holding member 43 is brought into a stretched state. The position of the movable member 48 relative to the support body 47 is fixed by the positioning unit. The locking portions 49 of the two support members 41 are attached to the two locked portions 44 attached to the second end 43b of the holding member 43. This maintains the holding member 43 in a stretched state against the biasing force of the winding spring. The holding member 43 is tensioned diagonally forward and downward.

[0033] A user P1 is seated on the chair 12 of the chair unit 10 of the care chair 1. At this time, as shown in Fig. 3, the lower leg (calf) P3 of the foot P2 of the user P1 is placed on the holding member 43. The holding member 43 holds the lower leg P3 as a surface, and the body pressure of the user P1 can be dispersed. The user P1 leans his / her back P5 against the backrest 17 of the chair 12 and grasps the two gripping bars 18 with his / her hands P7. As shown in FIG. 1, the caregiver moves the nursing chair 1 to the wash area 160, and aligns the first rail portion 32 of the nursing chair 1 with the second rail member 102 of the rail unit 100 in the left-right direction.

[0034] The chair unit 10 on which the user P1 is seated is moved upward by the main body 20 to a position higher than the bathtub 150. The main body 20 supporting the chair unit 10 is moved from the first rail portion 32 to the second rail member 102. When the chair unit 10 is moved downward by the main body 20, the user P1 immerses himself in the hot water in the bathtub 150.

[0035] After the user P1 has soaked in the hot water for a certain period of time, the user P1 can exit the bathtub 150 by reversing the above procedure.

[0036] As described above, in the nursing chair 1 of this embodiment, the user P1 can sit on the seat 16 of the chair body 50 placed on the support surface F1. Then, the two support members 41 are extended, and the second end 43b of the holding member 43 is attached to the two support members 41. Therefore, the holding member 43 in the extended state can be supported by the two support members 41. By placing the lower leg P3 of the foot P2 of the user P1 on the holding member 43, the lower leg P3 of the user P1 can be held over a relatively wide range, reducing the physical burden on the user P1. On the other hand, when the user P1 does not use the holding member 43, the holding member 43 can be separated from the two supporting members 41 by detaching the second end portion 43b of the holding member 43 from the two supporting members 41. Then, the two supporting members 41 can be put into a retracted state.

[0037] The nursing chair 1 has two locking parts 49 and two locked parts 44. Thereby, by attaching and detaching the two locked parts 44 and the two locking parts 49 to and from each other, the second end part 43b of the holding member 43 and the two supporting members 41 can be attached and detached to and from each other.

[0038] The nursing chair 1 has a support portion 45. Therefore, the support portion 45 can support the holding member 43 that is formed in a sheet shape and rolled up. The support member 41 is extendable and contractible, so that the length of the support member 41 can be adjusted.

[0039] Each support member 41 has a support body 47 and a movable member 48, and the nursing chair 1 has a connecting member 42. Since the two movable members 48 are integrated by the connecting member 42, the lengths of the two support members 41 can be adjusted in the same way as each other.

[0040] If the second end 43b of the holding member 43 is detachable from the two support members 41, the nursing chair 1 does not need to have the two locking parts 49 and the two locked parts 44. In other words, the second end 43b of the holding member 43 may be attached and detached to the two support members 41 by a permanent magnet and an electromagnet that is detachable from the permanent magnet. The nursing chair 1 may not have at least one of the connecting member 42, the support portion 45, and the winding spring.

[0041] Second embodiment Next, a second embodiment of the present invention will be described with reference to Figs. 8 and 9. The same components as those in the above embodiment are given the same reference numerals, and the description thereof will be omitted. Only the differences will be described. As shown in Fig. 8, the nursing chair 3 of this embodiment has a holding part 60 instead of the holding part 40 in each component of the nursing chair 1. Note that in Fig. 8 and Fig. 9 described later, the seat part 16 is indicated by a two-dot chain line. The holding portion 60 does not include the two locking portions 49, the two locked portions 44, and the support portion 45 in each configuration of the holding portion 40.

[0042] The first end 43a of the holding member 43 is attached to the chair body 50 via, for example, a support rod 70. The first end 43a of the holding member 43 may be attached directly to the chair body 50 or may be attached to two support members.

[0043] Here, another example in which the first end 43a of the holding member 43 is attached to the chair body 50 will be described. For example, although not shown, the chair body 50 has a first member that is disposed rearward at X2 from the seat portion 16 and extends downward from the support 11 and the like. In the support member 41, the rear X2 end of the support body 47 is attached to the lower end of the first member. The first member and the support body 47 are L-shaped when viewed in the left-right direction. The movable member 48 is movable relative to the support body 47 in the longitudinal direction (front-rear direction) of the support body 47. In this case, the first end 43a of the holding member 43 is attached to the first member of the chair body 50.

[0044] Furthermore, the front X1 end of the movable member 48 of each support member 41 is attached to the second end 43b of the holding member 43. That is, the movable member 48 of each support member 41 is not detachable from the second end 43b of the holding member 43, but is fixed to this second end 43b. The second end 43b of the holding member 43 is not attached to the chair body 50. The two support members 41 are capable of supporting the holding member 43 in a stretched state in which the second end 43b of the holding member 43 is stretched diagonally forward and downward with respect to the first end 43a of the holding member 43.

[0045] The two support members 41 pull the second end 43b of the holding member 43 diagonally forward and downward, thereby applying tension (tensile force) to the holding member 43. For example, in the holding member 43 of the second embodiment, folds 43c and 43d extending in the left-right direction are arranged diagonally forward and downward with a gap between them. For example, fold 43c is a mountain fold, and fold 43d is a valley fold. Folds 43c and 43d are alternately arranged diagonally downward toward the front. Because tension is applied to holding member 43, holding member 43 is held in a stretched state diagonally downward toward the front.

[0046] On the other hand, when the two support members 41 are in the retracted state, the holding member 43 is folded at the creases 43c and 43d as shown in Fig. 9. Therefore, the holding member 43 can be stored below the seat portion 16.

[0047] As described above, in the nursing chair 3 of this embodiment, the user P1 can sit on the seat 16 of the chair body 50 placed on the support surface F1. Then, the two support members 41 are extended. Therefore, the holding member 43 in the extended state can be supported by the two support members 41. By placing the lower leg P3 of the foot P2 of the user P1 on the holding member 43, the lower leg P3 of the user P1 can be held over a relatively wide range, reducing the physical burden on the user P1. On the other hand, when the user P1 does not use the holding member 43, the two support members 41 can be put into a retracted state.

[0048] The holding member 43 can be stored below the seat portion 16. By storing the holding member 43 below the seat portion 16 when it is not holding the foot P2 of the user P1, it is possible to prevent the holding member 43 in this state from becoming an obstacle to the user P1, etc.

[0049] It is to be noted that the holding member 43 does not necessarily have to be stored below the seat portion 16 . The folds 43c and 43d may not be formed in the holding member 43, and the holding member 43 may be stored below the seat portion 16 by, for example, rolling it up.

[0050] Third embodiment Next, a third embodiment of the present invention will be described with reference to Figs. 10 and 11. The same components as those in the above embodiment are given the same reference numerals, and the description thereof will be omitted. Only the differences will be described. As shown in FIG. 10, a care chair 5 of this embodiment includes a holding part 80 instead of the holding part 40 in each configuration of the care chair 1 of the first embodiment. The holding portion 80 has a holding member 81 instead of the holding member 43, the two locked portions 44, and the support portion 45 in each configuration of the holding portion 40.

[0051] The holding member 81 is formed in a flat plate shape and is made of foamed polyethylene resin, foamed polyurethane resin, EVA resin (Ethylen-Vinyl Acetate: ethylene-vinyl acetate copolymer resin), or the like. A first end of the holding member 81 is rotatably supported on the front X1 end of the seat portion 16. In this embodiment, the front X1 ends of the two support members 41 (movable members 48) are not attached to the holding member 81. The front X1 ends of the two support members 41 support the second end of the holding member 81 from below the second end.

[0052] On the other hand, when the two support members 41 are in the retracted state, the holding member 81 can be stored below the seat portion 16, as shown in Fig. 11. The holding member 81 hangs down. In the care chair 5 of the third embodiment, the physical burden on the user P1 can be reduced and the feet P2 of the user P1 can be supported.

[0053] Although the first to third embodiments of the present invention have been described above with reference to the drawings, the specific configurations are not limited to these embodiments, and the present invention also includes modifications, combinations, deletions, etc. of the configurations within the scope of the gist of the present invention. Furthermore, it goes without saying that the configurations shown in each embodiment can be used in appropriate combinations. For example, in the first to third embodiments, the number of the support members 41 that the nursing chairs 1, 3, and 5 have may be one.

[0054] The holding member 43 does not have to be formed in a sheet shape, and may be formed in a relatively thick plate shape (block shape) or the like. In this case, for example, the support member does not have the movable member 48 and is composed of only one support body 47. The chair unit 10 of the nursing chair 1, 3, 5 does not have to have the support body 11. The chair device is not limited to the nursing chair 1, and may be a general chair that does not include a motor or the like. [Explanation of symbols]

[0055] 1,3,5 Nursing chair (chair device) 16 Seat area 41 Support member 43,81 Retaining member 43a First end 43b Second end 44 Locked part 45 Support part 49 Locking part 50 Chair body F1 support surface P1 user P3 Lower leg

Claims

1. A chair body having a seat portion; A holding member having a first end and a second end and configured to support a user's lower leg; A support member provided on the chair body and extendable in the front-rear direction below the seat; Equipped with The first end of the retaining member is attached to the chair body, A chair apparatus, wherein the second end of the retaining member is detachable from the support member.

2. a latched portion attached to the second end of the holding member; a locking portion attached to the support member and detachable from the locked portion; The chair apparatus of claim 1 , comprising:

3. A chair body having a seat portion; A holding member having a first end and a second end and configured to support a user's lower leg; A support member provided on the chair body and extendable in the front-rear direction below the seat; Equipped with The first end of the retaining member is attached to the chair body, The second end of the retaining member is attached to the support member.

4. The chair apparatus according to claim 3 , wherein the holding member is retractable below the seat portion.

5. The support member includes two members. Each of the support members is A support body, A movable member that is movable relative to the support body in a longitudinal direction of the support body; having The chair apparatus according to claim 1 or 3, further comprising a connecting member connected to each of the two movable members.

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