TWI302453B - - Google Patents

Description

1302453 (1) EMBODIMENT OF THE INVENTION [Technical Fields of the Invention] The present invention is, for example, a chair used for a wheelchair for a moving means such as a squatter, and particularly a chair and a wheelchair provided with an armrest for the front wrist of the occupant. . [Prior Art]

For example, as disclosed in Patent Document 1, a reclining wheelchair capable of leveling a backrest pad against a seat cushion is known. In the technique disclosed in Patent Document i, the armrest is rotatably mounted on the left and right sides of the backrest pad, the armrest is formed to be rotatable in a horizontal state with respect to the backrest pad, and is rotatable into a pair of backrest pads at an angle of substantially 90 degrees. . [Patent Document 1] Japanese Unexamined Patent Publication No. Hei No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. Turning only the armrest will cause the front wrist to move back and forth against the friction on the armrest. Therefore, when the back cushion is gradually lowered, the front wrist will move backward while rubbing, and when the back cushion is gradually raised, the front wrist will be supported while moving forward, and the feeling of use is poor, depending on the situation, sometimes the front wrist The ministry will fall off the handrail. The present invention has been made in view of the above disadvantages, and the object is to make -4-1302453

There are: a seat cushion (seat mat) 11 to be seated by the user's occupant; a seat back (back cushion) for the occupant's back seat on the seat cushion 11; and, sitting on the seat The lower part of the occupant's leg on the pad 11 is supported as a foot pad (foot pad) 13 which is coupled to each other through a link mechanism. In addition, the reclining function formed by the action of the link mechanism enables the wheelchair to be a seat state in which the occupant is seated (Figs. 1 to 3) and a fully flat state in which the occupant can lie flat (the first 4 to 6)). The seat cushion 11 is supported by the chassis, but the pair of left and right main frames 14 of the chassis are disposed below the seat cushion 11 from the front end portion to the rear end portion. In addition, in each figure, the front and the rear are indicated by the arrow symbols F r and Rr, respectively. The left and right main frames 14 are formed by a combination of the erecting members 15 (tubes), having the necessary and sufficient strength rigidity. The seat cushion 1 1 is supported on the chassis by brackets 16 and 17 which are erected near the front and the rear of the main frame 14. The main frame 14 is disposed at an appropriate inclination to the lower side, and has a caster type front wheel 1 9 that is supported to be converted in a direction around the support shaft 18 at the front end portion thereof. In the vicinity of the rear end portion of the main frame 14, there is a rear wheel 20 in which the power supply device described below can be independently driven left and right. The rear wheel 20 is supported by the suspension arm 2 1 which is pivotally held at a position close to the front of the main frame 14 so that the main frame 14 can be moved up and down in a relative manner for a specified stroke. A shock absorbing device 22 having a buffer spring is inserted between the main frame 14 and the rear wheel 20, thereby ensuring the shock absorbing function of the chassis. The seat back 1 2 is mounted on a door-type or slightly rectangular seat back frame 23 (5) 1302453. The seat back frame 23 is formed to be coupled to the rear end portion of the main frame 14 by the link mechanism 24, and the seat back 12 is formed to be capable of being formed by the action of the link mechanism 24 (hereinafter referred to as a reclining mechanism). Rotation between the seat state and the fully flat state (Fig. 1, dotted arrow symbol A). Further, a headrest 26 is provided on the upper portion of the seat back 12 via the stay 25, and a hand pusher 27 for hand pushing is attached to a moderate height position on the back (back) side.

The lying mechanism 24 is driven by the lying drive unit 28. The reclining drive device 28 is configured to engage the reclining mechanism 24 in a predetermined movement by a telescopic operation, and is formed by an electric drive starting from a drive unit 29 in which a drive motor is housed. A pair of right and left handrails 30 are disposed at the left and right side portions of the seat back 1 2 at a predetermined height position (a position to be placed on the elbow of the occupant). The armrest 30 is pivotally supported by the seat back 1 2 (the seat back frame 23) so as to be rotatable in the vertical direction (Fig. 1 and the dotted arrow symbol B). When the electric wheelchair is in a seat state, as shown in Fig. 1 And the armrest 30 shown in Fig. 2 is maintained at a substantially horizontal level. Further, the armrest 30 is coupled to the chassis side by the link mechanism 3 1 on the rear end side thereof. Specifically, the link mechanism 31 has a crank-shaped link 3 1 A coupled to the rear end portion of the armrest 30 and a link 3 1 B coupled to the trailer 17 to cope with or synchronize with the seat back 30 The reclining motion of 12 is formed so as to be rotatable around the pivot thereof, and the tilting movable side of the seat back 1 2 can be displaced while being substantially parallel with the seat cushion 1 1 . On the front end side of one of the armrests 30 (in this case, the right side), a controller 3 2 is disposed to perform a driving operation for the electric wheelchair 1 and a lying operation for non-driving. In this situation, the controller 3 2 is configured to ride -8 - 1302453

The lever 3 3 can be easily operated by placing the elbow on the armrest 30. The other controller 3 2 is also capable of setting the armrest 3 on the left side. The controller 3 2 ′ is configured to perform driving control on the electric motor for rear wheel drive described below to perform the lying motion when the electric wheelchair 10 is traveling or the left and right revolving operations are performed, or when the seat state is to be in a seat state or a completely flat state. For example, the power switch is configured to be convertible into "driving", "lying", and "turning off the power", for example, the operating lever 3 3 that is in motion, and the switches 3 and 4 that are necessary for use other than driving. Here, as shown in Fig. 7, the armrest 30 is supported by the rear end to be rotatable, and the lever mechanism 3 1 enables the reclining movable side and the seat cushion without the seat back 1 2 1 1 is an armrest frame 30 保持 that is displaced in a substantially parallel state; and is provided on the handrail frame 3 扶手 on the armrest pad 30 放置 for placing the front wrist portion, and a crank-shaped connecting rod is coupled to the rear end portion of the arm frame 30 Α 3 1 Α. A slide rail 50 as a slide mechanism is disposed between the armrest frame 30A and the armrest pad 30B [refer to FIG. 7(c)], whereby the armrest pad 30B is slid back and forth in the armrest frame 3 Ο A. In the illustrated example, the inner rail 50A is fixed to the armrest frame 30A, and the outer rail 50B is fixed under the armrest pad 30B. A plurality of balls 50C are disposed between the inner and outer rails 50A and 50B. In this way, the linear reciprocating motion can be performed extremely easily, and the armrest pad 30B can also slide together when the wrist is moved forward and backward. In addition, the crank-shaped connecting rod 3 1 A to be coupled to the rear end portion of the armrest frame 3 Ο A is rotatably pivoted to the seat back 1 2 (back frame 23), and the other end is connected to the connecting rod 3 1 B, but it is processed into a suitable curved shape -9- (7) (7)

1302453 is detached from the armrest pad 30B to avoid interference with the armrest pad 30B. Further, the configuration of the link mechanism 31 is not limited to the configuration shown in the drawings, and is configured such that the armrest 30 can be displaced while being held in a substantially parallel state with the pad 1 1 without tilting the chair back 1 2, and does not interfere. Slide to pad 3 0 B. Further, a front projection 5 1 is attached to a lower portion of the front end of the armrest pad 30B, and a controller 3 2 is fixed to the bracket. Therefore, when the brace 30B forms a slip, the controller 32 also moves with the armrest pad 30B, and the relative positions of the armrest pad 30B and the controller 32 do not change. In addition, in the illustrated example, the shape of the bracket 51 is a section of the formation, but there is a gap between the portion and the front end of the armrest frame 3A, which is such that the armrest pad 30B can Only the necessary distance is behind. In addition, there is a section with a sliding of the frame armrest frame 3 0 A. The configuration of the control means is not limited. For example, as shown in Fig. 7(b), a control means 52 for moving the brake up and down is provided at an appropriate position in the armrest frame 30A, and the brake 52A is moved upward to the armrest pad. 3 0 B [Fig. 7 (b) state], or move the system 5 2 A downward to release the engagement. In this case, the shape is only released during the lying operation to release the engagement of the brake 5 2 A to allow the pad 30B to slide. Alternatively, the control means 52 may be electrically controlled or mechanically coupled to the lying mechanism 24 or the link mechanism 31. The corner pad 13 is mounted on the abutment frame 35. The foot frame body is formed by pivoting the upper end portion thereof at an appropriate position of the bracket 16 so as to be able to form a handle pad as long as the seat armrest is forwardly provided, and a sliding handle is provided, and only the 52A movable latch becomes Handrail system, 3 3 5 upwards -10- (8) 1302453

In the downward direction (Fig. 1, the dotted arrow symbol C), a bracket (6) attached to the upper end portion (the pivotal portion) is provided with a guide (or brake) 37 for controlling the range of rotation. The corner pad 13 is guided and rotated by the guide member 37, and is held forward to sag as shown in Figs. 1 and 2 when the electric wheelchair 1 is in the seat state, and the other is completely straight in the electric wheelchair 10. In the state, it is disposed adjacent to the seat cushion 11 at substantially the same height position and is horizontal (Fig. 4, Fig. 5). At the front end of the leg frame 35, there is a footrest 38 which is rotatable in a state as indicated by an arrow D in Fig. 1. Here, the leg frame 35 is coupled to the reclining mechanism 24 provided at the rear end portion of the main frame 14 by the link mechanism 39. The link mechanism 39 is extended inside the main frame 14 and extends in the front-rear direction so as to be substantially parallel to the main frame 14. In conjunction with the reclining mechanism 24 driven by the lying drive unit 28, the link mechanism 39 reciprocates in a substantially front-rear direction, thereby causing the corner pad 13 to perform a predetermined turning operation. That is, as shown in Fig. 4, in the completely straight state, the seat cushion 1 1 , the seat back 1 2 and the footrest 13 are all displaced in a continuous state to be horizontally arranged. Next, on the inner side of the left and right rear wheels 20, as shown in Fig. 1 or Fig. 3, the power supply device 40 for driving the rear wheels 20 is disposed separately. As shown in Fig. 8, the power supply device 40 is composed of an electric motor 41 of a power source and a gear case 42 including a reduction gear train for transmitting the deceleration of the electric motor 41 to the rear wheel 20. . The electric motor 41 is formed in a horizontally cylindrical shape to be horizontal. A plurality of gears are accommodated in the casing of the gear box 42 and have reduction gears for these gears -11 - 1302453

The rotary shaft of the input shaft of the train or the electric motor 41 of the main shaft 4 1 a is integrated with the gear box 42.

In this case, the gear case 42 is disposed inside the rear wheel 20, and has a rear wheel axle 43 that protrudes beyond the wheelchair width at a substantially central portion in the front-rear direction, and the rear wheel 20 is supported by the rear wheel axle 43. As is apparent from Fig. 8, the electric motor 41 is mounted on the inner side of the gear case 42, but is disposed in parallel with the rear wheel shaft 43 and is disposed rearward. Thus, the electric motor 4 1 is disposed so as to be staggered rearward to ensure a space on the front side thereof. Further, the electric motor 4 1 (rotation shaft 41a) and the rear wheel axle 43 are at the same height position [refer to Fig. 3 (b)]. Below the seat cushion 1 1 , a battery 4 4 for supplying power to the power supply device 40 is disposed. In the present invention, the battery case 45 (see Fig. 6 and the like) is disposed between the gear boxes 42 below the seat cushion 1 and the battery 44 is detachably attached to the battery holder 45 from the front. In this case, in front of the battery holder 45, the footrest 13 is supported by the front end of the seat cushion 11 while being rotatable in the vertical direction, but the footrest 13 is rotated upward (completely straight state). The front area of the battery rack 45 can be opened. As shown in Fig. 6, the frame member 46 of the battery holder 45 is a suspension member 15 that is suspended from the main frame 14 between the left and right main frames, and the tray 47 for mounting the battery is made of a frame material. 46 support is roughly horizontal. The battery holder 45 is formed in a region below the seat cushion 1 1 from the front wheel 19 to the rear wheel 20, and in this example, the two box batteries 4 4 are configured to be mounted side by side in the front and rear. -12- (10) 1302453 In addition, a loading and unloading port for taking out or putting in the battery 4 4 is opened in the front portion of the battery rack 45, and a battery brake 48 is attached to the loading and unloading port to fix the battery 44 to the battery holder 45. Inside to avoid the battery 44 moving or shaking.

Further, the control device 4 9 is provided, and the control device 49 controls the power source device 40 according to the operation of the controller 3 2 attached to the armrest 30 of the seat cushion 1 (refer to Fig. 9). The control device 49 is disposed in the chassis using the space between the battery holder 45 and the seat cushion. In this case, the bridge member 15 is suitably used, and the support control device 46 can be mounted by a bracket or the like. Further, the link mechanism 39 that couples the lying mechanism 24 and the footrest 13 is provided on the side of the control device 49 in the front-rear direction. Fig. 9 is a block diagram showing a schematic configuration of an electric drive system of the electric wheelchair 10 of the embodiment. The control signal is input to the control device 49 through the operation of the operating lever 39 or the switch 34 of the controller 32. The control device 49 supplies the electric power of the battery 44 to the right and left power supply devices 40 (L, R) or the drive motor built in the drive unit 29 of the reclining drive device 28 based on the control signal. Therefore, the drive control of the electric wheelchair 1 can be performed by the operation of the controller 32. In the above configuration, in the seat state shown in FIGS. 1 to 3, the occupant is seated on the electric wheelchair 1 by the operation of the controller 3 2 to drive the power source device 40, whereby the electric wheelchair 1 can be freely controlled. 0. When the electric wheelchair is not driving (at the time of stopping), the designated switch of the controller 3 2 is switched from "traveling" to "lying", whereby the controller 32 can be made 13-(11) 1302453 The operating part for lying down. Then, in response to the operation on the controller 32, the seat back 1 2 can be placed in a reclining motion between the seat state and the fully flat state. In the lying operation, the armrests 3 are displaceable while being held in parallel with the seat cushion 1 without the reclining motion of the seat back.

In the completely flat state shown in Figs. 4 to 6, the occupant can be placed in a flat posture. At this time, a wide area is ensured on the seat cushion 1 1 , the seat back 1 2 and the footrest 1 3 which are arranged horizontally in total, and the convenience of use can be achieved by measures such as turning over in response to the demand. However, when the above lying motion is performed, the sliding control by the control means 52 against the armrest pad 30B is released. Therefore, the armrest pad 30B can move rearward together with the front wrist portion when the seat back 12 is gradually lowered, and the armrest pad 30B can move forward together with the front wrist portion when the seat back 12 is gradually raised. Thereby, the front wrist portion is prevented from moving against the armrest 30 against the friction, and the comfort of use can be improved. Further, when the armrest pad 30B is slid, since the relative positional relationship between the armrest pad 30B and the controller 32 does not change as described above, for example, even in a completely straight state, the occupant can be equipped without having to get up. 32 is placed on the lying operation. The present invention has been described in connection with the various embodiments thereof, but the present invention is not limited to the actual embodiments, and various modifications can be made within the scope of the invention. That is, the present invention can be applied to a chair having a reclining function as long as it has a handrail. A healthy person usually unconsciously lifts his wrist when he or she is lying in a wheelchair, but in particular, it is necessary to provide an electric wheelchair or a manual wheelchair for use in a wrist-deficient-14- (12) 1302453 weak sorghum. When inventing, there is a large effect particularly in terms of improving the comfort of use. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing the overall configuration of an electric wheelchair in a seat state according to an embodiment of the present invention.

Fig. 2 is a plan view and a side view showing the entire configuration of the electric wheelchair in a seat state according to the embodiment of the present invention. Fig. 3 is a rear view showing the overall configuration of the electric wheelchair in the seat state according to the embodiment of the present invention. Fig. 4 is a perspective view showing the overall configuration of the electric wheelchair in a completely flat state according to the embodiment of the present invention. Fig. 5 is a plan view and a side view showing the entire configuration of the electric wheelchair in a completely flat state according to the embodiment of the present invention. Fig. 6 is a front elevational view showing the entire configuration of the electric wheelchair in a completely flat state according to the embodiment of the present invention. Fig. 7 is a view showing a configuration of a periphery of a handrail and a slide rail according to an embodiment of the present invention. Fig. 8 is a plan view showing the periphery of the rear wheel of the electric wheelchair according to the embodiment of the present invention. Fig. 9 is a block diagram showing the outline of an electric drive system of an electric wheelchair according to an embodiment of the present invention. [Main component symbol description] 1 0. Electric wheelchair -15- (13) 1302453 Seat cushion (seat cushion) Backrest (back cushion) Footrest (footpad) Main frame Bracket member Front wheel Rear wheel

Back frame, linkage mechanism, lying drive, drive unit, armrest: armrest frame: armrest pad, linkage mechanism

11:12 : 13 : 14 : 15 : 19 : 20 : 23 : 24 : 28 : 2 9 : 30 : 30A 30B 3 1: 32 : 33 : 50 : 50A 50B 50C 5 1: 52 : Controller lever slide : Inner rail = outer rail: ball bracket control means 5 2 A : brake

Claims (1)

I30f#53 Patent Application No. 94102348 X. Patent Application Scope 1 A chair characterized by: having: a seat cushion; a backrest cushion for a user's back rest sitting on the seat cushion; being disposed at a designated height position of a side portion of the backrest cushion, being supported a reclining mechanism that rotates on the rear end side; and a reclining mechanism that causes the back cushion to tilt toward the seat cushion, wherein the armrest is formed by a link mechanism so as to be capable of tilting the back cushion The seat cushion is held in a substantially parallel state and is displaced upward and downward and forward and backward in conjunction with the tilting movement of the backrest pad, and is formed to be slidable forward and backward by a sliding mechanism. The chair according to the first aspect of the invention, wherein the armrest is supported to be rotatable on a rear end side, and is formed by a link mechanism so as not to be tilted by the backrest pad. a handrail frame that is displaced while being substantially parallel to the seat cushion; and an armrest pad for placing the front wrist portion on the armrest frame. The armrest pad is slid forward and backward on the armrest frame by the sliding mechanism. . 3. The chair according to claim 2, wherein the sliding mechanism is: an inner rail provided on one of the armrest frame and the armrest pad; and an outer rail provided on the other side; It is composed of balls that are between these inner and outer rails. 4. As stated in the first paragraph of the patent application, the chair 1302453 4 * - The operation unit for the horizontal operation is provided at the front end portion of the armrest, and is formed to move forward and backward together with the sliding of the armrest. 5. The chair as recited in claim 1 of the patent application, wherein the 'there is a means of controlling the sliding of the handrail. 6. The chair as recited in claim 5, wherein the control means controls the sliding of the handrail during the non-lying operation, and the sliding of the handrail during the lying operation. Tube Φ system. 7. A wheelchair, characterized in that: a chair provided with: a seat cushion; a backrest cushion for a user's back seated on the seat cushion; and a predetermined height position disposed at a side portion of the backrest cushion An armrest that is rotatable on a rear end side; and a reclining mechanism that causes the backrest pad to tilt toward the seat cushion, and the armrest is formed by a link mechanism so as to be independent of the backrest The tilting motion is maintained in a substantially parallel state with the seat cushion, and is displaced upward and downward and forward and backward in conjunction with the tilting movement of the backrest pad, and is formed to be slidable forward and backward by a sliding mechanism. -2-