JP2006296551A - Electric legless chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric legless chair allowing a user to easily sit thereon and stand up therefrom. <P>SOLUTION: This electric legless chair is provided with a base 1, a seat frame part 14a and a back frame part 14b formed integrally, a frame body 13 vertically movably provided on the base, a vertical driving source provided in the base and vertically driving the frame body, a seat part body 24 provided in the seat frame part of the frame body and having its rear end rotationally turning around its front end part, a rolling driving source 32 provided in the frame body and having its rear end rotationally driven in the lifting direction using the front end of the seat body as a fulcrum, and a back body 22 provided in the back frame part of the frame body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric seat chair suitable for a user who is difficult to stand up or sit by himself.

  In general, since the seating position of the seat chair is low, it may be very difficult for a user who has weak legs to sit on the seat body or to stand up from the seated state. In view of this, an electric seat chair has been developed in which the seat body is driven up and down so that the user can sit on the seat body and get up from the seated state relatively easily. Yes. Patent Document 1 discloses such an electric seat.

  That is, the electric seat chair disclosed in Patent Document 1 has a leg frame, and a back frame is provided on the leg frame along the vertical direction. The back frame is provided with a seat support frame having a seat so as to move up and down. The seat support frame is driven in the vertical direction by an electric motor.

Accordingly, when the seat support frame is raised to a predetermined height, the user can sit down on the seat provided on the seat support frame or stand up from the sitting state. This can be done more easily than when it is in position.
Japanese Patent No. 3436888

  By raising the height of the seat, the user may easily perform operations such as sitting on the seat or standing up from the seated state. Nevertheless, since the seat is in a horizontal state even when it is raised, the user must sit down from the standing state until the buttocks hit the seat. Also, when standing up from the seated position, the bent knee must be stretched while lifting the buttocks. Therefore, it is sometimes difficult for a physically handicapped user to perform such an operation by himself.

  The present invention provides an electric seat chair that can reduce a burden placed on a user when sitting on a seat raised to a predetermined height or standing up from a seated state. There is.

The invention comprises a base,
A frame body having a seat frame portion and a back frame portion provided integrally, and provided on the base so as to be movable up and down;
A vertical drive mechanism provided on the base for driving the frame body in the vertical direction;
A seat body provided on the seat frame of the frame body so as to be rotatable in a direction in which the rear end rises with the front end as a fulcrum;
An undulation drive mechanism that is provided on the frame body and that rotates the seat body in a direction in which the rear end rises with the front end as a fulcrum;
An electric seat chair comprising: a back body provided on a back frame portion of the frame body.

A pair of upper and lower guide bodies having a U-shaped cross section are provided on the base in a vertical direction spaced apart at a predetermined interval, and the frame body has a pair of side frames connected by a connecting shaft at a predetermined interval.
At both ends of the connecting shaft, an upper and lower guide roller for guiding the frame body in the vertical direction along the upper and lower guide bodies; It is preferable that an anti-slip roller that restricts the body from shifting in the width direction of the base is provided.

  The seat body may be provided with detection means for switching the movement of the seat body from the descending direction to the ascending direction when an obstacle hits when the seat body is driven in the descending direction. preferable.

  According to the present invention, the seat body can be driven in the vertical direction, and the seat body can be driven in the direction in which the rear end rises with the front end as a fulcrum. By raising the seat body, it is easy to sit down because it is easy to apply the buttocks to the seat body when sitting, and it is easy to stand up because the buttocks are pushed up diagonally upward when standing.

An embodiment of the present invention will be described below with reference to the drawings.
The electric seat chair shown in FIG. The base 1 is formed by connecting one end portion and the other end portion of a pair of leg members 2 (only one is shown) opposed to each other in parallel by a pair of connecting members 3.

  A front caster 4 is provided at the front end of the leg member 2, and one end of an inverted L-shaped attachment member 5 is fixed to the rear end. A rear caster 6 with a stopper is provided at the other end of the mounting member 5. Thereby, the base 1 can run. A horizontal rod 7 is installed on the pair of attachment members 5, and a step 8 in which a pipe material is bent in a U shape is provided in the middle of the horizontal rod 7.

  As shown in FIGS. 2 and 3, a pair of first guide bodies 11 that are spaced apart in parallel are fixed to the connecting member 3 provided at the rear end portion of the base 1, and the lower end is fixed toward the rear side. It is erected with an inclination. As shown in FIG. 5, the guide body 11 has a U-shaped cross-section and has an open side surface directed inward in the width direction of the base 1. The pair of first guide bodies 11 is covered with a cover 12 via a framework (not shown) on the outer side and the rear side in the width direction. A hand frame 10 is provided on the top of the cover 12.

  A frame body 13 is provided on the pair of first guide bodies 11 so as to be movable up and down. The frame body 13 has a pair of side frames 14 formed by bending a flat square pipe or the like into an L shape as indicated by a chain line in FIGS. The pair of side frames 14 includes a horizontal portion 14 a serving as a seat frame portion and a standing portion 14 b serving as a back frame portion. The horizontal portion 14 a is connected by a connecting pipe 15, and the standing portion 14 b is connected by a pair of connecting shafts 16. Has been.

  As shown in FIG. 5, upper and lower guide rollers 17 are rotatably provided at both ends of the pair of connecting shafts 16. A pair of upper and lower guide rollers 17 provided at both ends of each connecting shaft 16 are inserted into the first guide body 11 and a pair of three side walls forming the guide body 11 are positioned in the front-rear direction of the base 1. It can roll along the inner surface of the side wall.

  In addition, concave grooves 18 are formed at both ends of the connecting shaft 16. The concave groove 18 is provided with an anti-slipping roller 19 having a rotational axis orthogonal to the rotational axis of the upper and lower guide rollers 17. The slip prevention roller 19 is in contact with the inner surface of one of the three side walls of the first guide body 11 whose plate surface is perpendicular to the width direction of the base 1. Accordingly, the slip prevention roller 19 restricts the frame body 13 from moving in the width direction of the base 1.

  A frame-like back support frame 21 is provided on the upright portion 14b of the side frame 14 with its lower end connected. The back support frame 21 is provided with a back body 22 as shown in FIG. Although not shown in detail, the back body 22 is formed by covering a cushion material with an exterior.

  A seat portion 24 is provided on the horizontal portion 14 a of the side frame 14 with its tip end portion rotatably connected by a support shaft 25. As with the back body 22, the seat body 24 is formed by covering a cushion material with an exterior ground. A pair of second guide bodies 26 (only one is shown) having guide grooves 26 a are provided along the front-rear direction at both ends in the width direction of the lower surface of the seat body 24.

  A roller 28 provided at the tip of the raising lever 27 is engaged with the guide grooves 26a of the pair of guide bodies 26 so as to be able to roll. As shown in FIG. 3, the middle portion of the raising lever 27 is pivotally attached to a bent portion of the middle portion of the side frame 14 by a support shaft 29. A mounting shaft 31 is installed between the other ends of the pair of raising levers 27. A undulation drive source 32 constituting a undulation drive mechanism is pivotally attached to the mounting shaft 31.

  The hoisting drive source 32 has a cylindrical portion 32a, and a driving shaft 33 is provided on the cylindrical portion 32a. The drive shaft 33 is driven by the hoisting drive source 32 in the axial direction protruding from the cylindrical portion 32a. The tip of the drive shaft 33 is pivotally attached to the connecting piece 34. As shown in FIG. 4, the connecting piece 34 is fixed to a horizontal bar 35 installed between the upper ends of the upright portions 14 b of the pair of side frames 14.

  When the drive shaft 33 of the hoisting drive source 32 is driven in a direction protruding from the cylindrical portion 32a, the raising lever 27 descends with the support shaft 29 as a fulcrum, as shown by the chain line in FIG. To turn. As a result, one end portion of the raising lever 27 is raised, and the roller 28 provided at the one end portion rolls on the guide groove 26 a of the second guide body 26, so that the seat portion 24 supports the support shaft 25. As a result, the rear end side is rotated in the rising direction.

  A bracket 36 is provided in the middle of the upright portion 14 b of the pair of side frames 14. A base end portion of an armrest body 37 is rotatably attached to each bracket 36 by a support shaft 38. The armrest 37 is not rotatable downward from the horizontal state, and is rotatable upward from the horizontal state.

  As shown in FIG. 2, a connecting piece 41 is provided at a midway portion in the longitudinal direction of the connecting member 3 located on the rear end side of the base 1. The connecting piece 41 is pivotally supported by a vertical drive source 42 that constitutes a vertical drive mechanism. The vertical drive source 42 is configured to rotationally drive the screw shaft 43.

  The screw shaft 43 is screwed into a pair of nut bodies 44 provided so as to protrude from the back side of the upright portion 14 b of the frame body 13. As shown in FIG. 4, the nut body 44 is provided on a pair of horizontal rods 45 that are erected between the upright portions 14 b of the pair of side frames 14 at a predetermined interval in the vertical direction.

  Accordingly, when the screw shaft 43 is rotationally driven in either the forward or reverse direction by the vertical drive source 42, the frame body 13 rises along the first guide body 11 via the nut body 44. It is driven in the direction or downward direction.

  As shown in FIG. 6, a detection frame 46 constituting detection means is held on the lower surface of the seat body 24 by a support member 47 so as to be movable in the vertical direction. The detection frame 46 corresponds to three sides excluding the rear side of the lower surface of the seat body 24. Detection switches 48 that are actuated by tape-like pressure are provided on three side portions corresponding to the detection frame 46 on the lower surface of the seat body 24.

  When the seat body 24 is driven in the descending direction, for example, a lower leg or an article of the user hits the lower surface side of the seat body 24, and the detection frame 46 is against the lower surface of the seat body 24. When it rises relatively, the detection switch 48 is actuated by the detection frame 46. The detection frame 46 is elastically biased in a downward direction by a spring (not shown).

  As shown in FIG. 1, an up / down operation switch 51 is provided at the tip of one armrest body 37, and a undulation operation switch 52 is provided at the tip of the other armrest body 37. The frame body 13 can be operated in the upward or downward direction by the up / down operation switch 51. By the raising / lowering operation switch 52, the seat body 24 can be operated in a standing direction in which the rear end side rises from a horizontal state and in a direction in which the seat body 24 falls from the standing state.

  FIG. 7 is a control block diagram for driving the seat body 24 in the vertical direction. When the up / down operation switch 51 is operated, a DC voltage from the DC power source 54 is supplied to the up / down drive source 42 via the switching unit 53, and the up / down drive source 42 is activated. Thereby, the seat portion body 24 is driven in the upward direction or the downward direction.

  When the seat body 24 is driven in the downward direction by the up / down operation switch 51, an obstacle hits the detection frame 46 by a user pinching the lower limb on the lower surface side of the seat body 24, and the detection frame 46. Is raised relative to the seat body 24 and the detection switch 48 is activated, this is input to the switching portion 53 as a detection signal.

  If the up / down operation switch 51 is continuously operated, the switching unit 53 converts the direction of the DC voltage output from the DC power source 54 to be output to the up / down drive source 42 by the detection signal from the detection switch 48. As a result, the driving direction of the seat portion body 24 is switched from the descending direction to the ascending direction.

  Therefore, for example, when the user sandwiches the lower limb on the lower surface side of the seat part body 24, the driving direction of the seat part body 24 is immediately converted into the upward direction. If the lift of the seat body 24 is stopped by releasing the hand from the up / down operation switch 48, it immediately stops at the height position.

  Further, when the detection switch 48 detects an obstacle on the lower surface side of the seat body 24, if the hand is released from the up / down operation switch 48 to stop the operation, the seat body 24 stops at the height position at that time. To do.

  According to the electric seat chair having such a configuration, when the user sits on the seat body 24, the seat body 24 is raised to a predetermined height. Next, the raising / lowering drive source 32 is operated to drive the seat body 24 in the raising direction.

  And if a user touches the seat part body 24 which raised the collar part, this user will rotate the seat part body 24 from the raised state to the lying down direction. And if the seat part body 24 falls down horizontally, the user can seat on the said seat part body 24. FIG.

  When seated in this manner, the seat body 24 is raised, so that the user can place the buttocks on the seat body 24 without greatly lowering the buttocks downward or bending the knee greatly. You can guess. If the buttock can be applied to the seat body 24, the user can be held and stabilized by the seat body 24, so that the user can relatively easily rotate the seat body 24 in the lying down state in this state. The buttocks can be placed on the seat body 24.

  When the collar portion is placed on the seat portion body 24, the seat portion body 24 is lowered. Thereby, the seat part 24 can be lowered together with the back part 22 to the position shown by the chain line in FIGS. That is, the user can sit on the seat body 24 of the seat.

  When the user lowers the seat body 24 after placing the buttocks on the seat body 24, for example, the user may put the lower limb on the lower surface side of the seat body 24. In such a case, the lower limb hits a detection frame 46 provided on the lower surface of the seat body 24, and the detection frame 46 rises relative to the seat body 24.

  When the detection frame 46 is raised, the detection switch 48 is activated. If the up / down operation switch 51 is continuously operated, the flow of the DC voltage supplied to the up / down drive source 42 is reversed. Accordingly, the driving direction of the seat body 24 is converted from the descending direction to the ascending direction, so that the user's lower limb can be prevented from being caught.

  Further, when the lower limb hits the lower surface of the seat body 24, if the operation of the up / down operation switch 51 is stopped, the seat body 24 stops at that position, so that the lower limb can be prevented from being caught. .

  When a user sitting on the seat body 24 stands up, first, the seat body 24 is raised by operating the up / down operation switch 51. By raising the seat body 24, the user can extend the bent knee.

  When the seat body 24 is raised to a predetermined height, the hoisting operation switch 52 is operated to rotate the seat body 24 in the raising direction. When the seat body 24 is raised, the user's buttocks are pushed diagonally forward, so that the user can stand up by the movement of the seat body 24. In other words, the user can stand up with good stability because the seat body 24 is raised, and the buttocks are pushed diagonally forward after the bent knee is stretched.

  Thus, according to the electric seat chair of the present invention, since the seat body 24 is not only moved up and down, but also has a structure that can be driven in the undulation direction with the front end as a fulcrum, When standing up, the seat body 24 is raised to reduce the burden on the user. That is, even a user who is physically disabled can sit or stand up relatively easily.

  FIGS. 8A to 8D show modified examples of the detection switch 48 provided on the seat body 24. 8A to 8C has a frame 61, and the upper surface and outer peripheral surface of the frame 61 are covered with a cushion body 62 having a mirror part 62a and a peripheral wall part 62b.

  In FIG. 8A, the detection switch 48 is provided over almost the entire length in the width direction between the front end surface of the frame 61 and the peripheral wall portion 62b of the cushion body 62 covering the front end surface. Accordingly, when the user seated on the seat body 24 bends the lower limb to the lower surface side of the seat body 24 and deforms the peripheral wall 62b of the cushion body 62, the detection switch 48 detects that and the seat body is detected. The driving in the descending direction of 24 is stopped.

  That is, in order to detect that the user's lower limb has entered the lower surface of the seat body 24 by the side wall 62b on the front end side of the cushion body 62, compared to the case where a detection switch is provided on the lower surface of the cushion body 24 to detect it. It is possible to detect at an early point that the end has entered the lower surface of the body 24.

  8B, the front end surface of the frame 61 is inclined rearward, and the peripheral wall 62b of the cushion body 62 is also inclined in the same manner as the front end surface. A detection switch 48 is provided on the inclined surface of the frame 61, and the peripheral wall 62 b of the cushion body 62 is integrally contacted with the detection switch 48. According to such a configuration, when the bending angle of the user's lower limb to the lower surface side of the seat body 24 is larger than that in the case of FIG. 8A, the detection switch 48 is activated.

  8C, the front end surface of the frame 61 is inclined as in FIG. 8B, but the peripheral wall 62b of the cushion body 62 is kept vertical, and a gap is formed between the inclined surface of the frame 61 and FIG. Has been. The detection switch 48 is provided on the inclined surface of the frame 61, and the upper end of the detection switch 48 is bent when the peripheral wall 62 b of the cushion body 62 is deformed in a direction approaching the inclined surface of the frame 61.

  Therefore, when the user folds the lower limb to the lower surface side of the seat body 24 and the peripheral wall 62b of the cushion body 62 is deformed, the upper end portion of the detection switch 48 is deformed together with the peripheral wall 62b and used for the lower surface of the seat body 24. Detects that the person's lower limb has entered. That is, it is possible to detect that the lower limb has entered the lower surface side of the seat body 24 before the user's lower limb is pressed by the rigid frame 61 of the seat body 24.

  FIG. 8D shows the structure shown in FIGS. 8A to 8C. Further, a detection switch 48 is provided along the three side portions on the rear end portion side of the lower surface of the seat body 24, and the front end portion side is also provided. The detection switches 48 are provided not only on the front surface of the frame 61 but also on both side surfaces.

  According to such a configuration, it is possible to detect not only when the lower limbs enter the lower surface of the front end side of the seat body 24 but also when the hands are placed on the lower surfaces of both sides. This can also be detected when a foreign object enters the lower surface on the rear end side.

The perspective view of the electric seat chair which shows one embodiment of this invention. The sectional side view of the seat chair which shows the mechanism for an up-down drive which moves a seat part body up and down. The sectional side view of the seat chair which shows the mechanism for the raising / lowering drive which drives the seat part to raise / lower. The side view of a frame body. Sectional drawing of a pair of 1st guide body provided so that a frame body can be moved up and down. The side view of the seat part body which shows a detection means. The block diagram of the control system for driving a seat part body up and down. (A)-(d) is a figure which shows the modification of the detection switch provided in a seat part body, respectively.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Base, 13 ... Frame body, 14a ... Horizontal part (seat frame part), 14b ... Standing part (back frame part), 17 ... Vertical guide roller, 19 ... Anti-slipping prevention roller, 22 ... Back part body, 24 ... Seat A body, 32 ... driving drive for raising / lowering, 42 ... drive source for raising / lowering, 48 ... detection switch (detection means), 51 ... up / down operation switch, 52 ... raising / lowering operation switch.

Claims (3)

Base and
A frame body having a seat frame portion and a back frame portion provided integrally, and provided on the base so as to be movable up and down;
A vertical drive mechanism provided on the base for driving the frame body in the vertical direction;
A seat body provided on the seat frame of the frame body so as to be rotatable in a direction in which the rear end rises with the front end as a fulcrum;
An undulation drive mechanism that is provided on the frame body and that rotates the seat body in a direction in which the rear end rises with the front end as a fulcrum;
An electric seat chair comprising: a back body provided on a back frame portion of the frame body. A pair of upper and lower guide bodies having a U-shaped cross section are provided on the base in a vertical direction spaced apart at a predetermined interval, and the frame body has a pair of side frames connected by a connecting shaft at a predetermined interval.
At both ends of the connecting shaft, an upper and lower guide roller for guiding the frame body in the vertical direction along the upper and lower guide bodies; The electric seat chair according to claim 1, further comprising an anti-slip roller that restricts the body from shifting in the width direction of the base.   The seat body is provided with detection means for switching the movement of the seat body from the descending direction to the ascending direction when an obstacle hits when the seat body is driven in the descending direction. The electric seat chair according to claim 1, characterized in that:

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