JPH053067Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention provides a seating device, in particular, a seating device in which the seating portion can be moved from a horizontal position to an inclined position via a driving means, so that the seated person cannot stand up. Regarding things that can help.

2. Description of the Related Art In general, seating devices such as chairs and seats are designed for normal healthy people, and are therefore often unsuitable for use by, for example, the elderly or the physically handicapped. Even if an elderly person is healthy, if his or her physical strength is declining, he or she may not be able to stand up easily on his own after sitting in a chair, etc., and may only be able to leave his seat with the assistance of another person.
Or, a physically disabled person who regularly uses crutches may find it difficult to stand up after sitting down without assistance.

Problems to be solved by the invention Japanese Utility Model Application Publication No. 59-61017 has proposed a device that enables the elderly and physically disabled persons mentioned above to stand up on their own without any assistance when they sit down and try to stand up. It is provided in the official bulletin.

However, according to the invention described in the same publication, an electric motor is fixed to the rear of the seat support base, and the end of a threaded tube that expands and contracts by rotating a threaded rod by the output of the electric motor is pivotally connected to the lower surface of the front of the seat. At the same time, a link mechanism is provided between the rear of the seat support base and the lower surface of the front of the seat, so when a seated person tries to stand up and operates the electric motor, the seat is raised by the screw cylinder and The link mechanism causes the seat support to pivot backwards in a large arc around the rear of the seat support, which causes the seated person's center of gravity to move backwards along with the seat, causing their lower back to move backwards when they try to stand up. I get pulled and can't stand up easily. Therefore, this has the disadvantage that it does not assist in trying to stand up.

Therefore, in the present invention, when the seated person tries to stand up, by operating the drive means, the seat part rises to push the seated person's waist forward, rotates forward and tilts, and the seated person's center of gravity To provide a seating device that can move a person forward.

Means for Solving the Problems In view of the above-mentioned circumstances, the present invention provides a base part fixed to a leg stand part, a frame part fixed to a seat part placed on the leg stand part, and a base part fixed to a seat part placed on the leg stand part. a pair of arms of different lengths, one end of which is rotatably supported on the front side of the frame; a pair of links of different lengths, one end of which is rotatably supported on the rear side of the frame; It consists of an electric drive means that telescopically connects the front side of the base part and the rear side of the frame part, and the arms and links are arranged such that the long arms and links are respectively arranged on the rear side of the short arms and links, This seating device is provided with a movable seat part, the other end of which is rotatably supported by a long arm, and the other end of a short arm is rotatably supported by a short link.

Effects According to the present invention, when a seated person operates the electric drive means, the frame portion, which is in a horizontal position and almost overlaps with the base portion, rises while tilting forward, and tilts forward at a predetermined angle. . Therefore, due to the upward inclination of the frame portion, the waist of the person seated on the seat portion is lifted to the height of the standing position, and the person is pushed forward and can easily stand up.

Embodiments The present invention will be explained below based on illustrated embodiments.

The illustration shows a seating device implemented on a dining table chair, but it can also be implemented on reception chairs, easy chairs, etc. Figure 1 is a perspective view, and Figure 2 is a central longitudinal cross-sectional side view of the movable seat. , FIG. 3 is a plan view, and FIG. 4 is an explanatory diagram of the operation.

As shown in FIG. 1, the chair 1 has a frame-shaped leg rest 2 made of wood and a backrest frame 3.
A seat portion 4 having a cushion is placed on the backrest frame 3, and a backrest frame 5 having a cushion is placed on the backrest frame 3.
is provided. A mechanism is provided on the lower surface of the seat 4 to raise the seat 4 and tilt it forward.
A movable seat portion 6 is formed.

As shown in FIG. 2, the movable seat portion 6 is
It has a base part 7 fixed to the upper surface of the seat part 4 and a frame part 8 fixed to the seat part 4. The base portion 7 has a third
As shown in the figure, metal fittings 7a, 7a made of a pair of angle members are placed on side frames 2a, 2a arranged on the left and right sides on the upper surface of the leg base 2, and fixed with wood screws, etc.
, a reinforcing rod 7b such as a pipe connected and fixed between the metal fittings 7a, 7a on the front side of the metal fittings 7a, 7a, and a pair of brackets 7c, 7c protruding downward from approximately the center of the reinforcing rod 7b. Become.

On the other hand, the frame part 8 has a fixing plate 8a fixed to the substantially central part of the back surface of the seat part 4 with a wood screw or the like, and left and right end parts of the fixing plate 8a on the rear side of the metal fittings 7a, 7a and the brackets 7c, 7c. It consists of vertical bent portions 8b, 8b bent downward and brackets 8c, 8c integrally formed at the tail ends thereof. and,
Arms and link means 9, 9 are rotatably supported and connected to the base portion 7 and the frame portion 8, respectively, in a bilaterally symmetrical configuration.

To explain one of the arms and link means 9, 9 with reference to FIG. 2, an arm 9a having one end pivotally supported by the reinforcing rod 7b, an arm 9b longer than arm 9a having one end pivotally supported by the bracket 7c, A link 9c has one end pivotally supported on the vertically bent portion 8b and a central portion and the other end pivotally connected to the other end of the arm 9a and a substantially central portion of the arm 9b, respectively; The link 9d is longer than the link 9c and is pivotally connected to the other end of the arm 9b. The long arm 9b and the long link 9d are each arranged on the rear side. Arm and link means 9
is made of a metal pipe, but it may also be made of a metal plate.

Furthermore, an electric drive means 10 is provided between the brackets 7c and 8c. This electric drive means 10 includes an outer cylinder 12 whose one end is pivotally connected to a shaft 11 bridged between brackets 8c and 8c, and an inner cylinder which is telescopically inserted into the outer cylinder 12 coaxially. 13, one end of the inner cylinder 13 is pivotally supported and connected to a shaft 14 bridged between the brackets 7c, 7c. On the other hand, the inner cylinder 13
An electric motor 15 capable of rotating in both forward and reverse directions is integrally connected to the drive unit through a speed reducer 16. On the output side of the decelerator 16, a screw shaft 17 is rotatably provided and inserted into the axes of the outer cylinder 12 and the inner cylinder 13. A telescopic guide 18 is screwed into the free end of the screw shaft 17, and the telescopic guide 18 is integrally formed with the inner cylinder 13 or fixed by welding or the like.

In order to keep the length of expansion and contraction of the outer cylinder 12 and the inner cylinder 13 within a certain range, a pair of limit switches 19,
20 is fixed, and the operating pieces 21 and 22 are brought into contact with the circumferential surface of the inner cylinder 13. On the other hand, holes 23 and 2 at both ends of the inner cylinder 13 allow the actuating pieces 21 and 22 to sink in and turn the limit switches 19 and 20 OFF.
4 are provided protruding from each other.

To explain the operation of the above embodiment, when a person sits on the seat 4, the seat 4 is maintained in a horizontal position, similar to a normal chair. Next, when the seated person tries to stand up, if the electric motor 15 is turned on and driven to rotate in the normal direction, the screw shaft 17 rotates in the normal direction, extending the total length of the outer cylinder 12 and the inner cylinder 13, and thereby the frame The part 8 moves upward from the base part 7, and the arms and link means 9, 9 rotate about the pivot points of the arms 9a, 9a and 9b, 9b. When the total length of the inner cylinder 12 and outer cylinder 13 reaches a predetermined length, the actuating piece 21 of the limit switch 19 falls into the hole 23 to open the forward rotation circuit, cut off the power to the electric motor 15, and cause the frame portion 8 to move. is stopped as the upper limit. At this time, as shown in FIG. 4, the frame part 8 is tilted forward at a predetermined angle above the base part 7 by the pair of arms of different lengths and the link means 9, and at this time the frame part 8 The position corresponds to the height of the waist of the seated person when he or she stands up.
Therefore, the seated person can stand up on the floor or the like by stretching his or her legs. Also, when trying to sit again after moving the seat 4 in this way,
When the reversing switch of the electric motor 15 is turned on, the screw shaft 17 rotates in the opposite direction to that described above, reducing the total length of the outer cylinder 12 and the inner cylinder 13, so that the frame part 8 is placed in a horizontal position so as to overlap the base part 7. becomes.
At this time, the operating piece 22 of the limit switch 20 falls into the hole 24, opening the reversing circuit, and the motor 1
5 stops rotation. That is, since the lower limit of the movement of the frame part 8 is determined, the frame part 8 is in a horizontal position as shown in FIG.
It returns to a horizontal position where it can be seated again.

Effects of the invention According to the invention described above, the seat of the seating device is configured to be lifted upward and tilted forward by operating the drive means, so that the seated person can freely tilt the seat. When operated, the lower back rises and is pushed forward, moving the seated person's center of gravity forward, making it easier to stand up without the assistance or assistance of others. Extremely convenient. In addition, the base part and the frame part only need to have a configuration that supports the center of gravity of the seated person, which is approximately at the center of the seat part, and a driving force that lifts the weight, so that the base part and the frame part can be structured compactly. Since the link means and the electric motor of the electric drive means are placed on the back of the seat, the above-the-floor part of the legrest can be maintained as a space, so there are no obstacles for the seated person's feet to hit, and there is a high degree of freedom in design. It looks good, has a compact structure, is light in weight, and is highly practical as a seating device for home use.

[Brief explanation of the drawing]

The drawings show an example in which the present invention is applied to a dining chair. Fig. 1 is a perspective view, Fig. 2 is a longitudinal cross-sectional side view of the movable seat, Fig. 3 is a plan view, and Fig. 4 is an explanation of the function. It is a diagram. 2... Leg stand part, 4... Seat part, 6... Movable seat part,
7...Base part, 8...Frame part, 9...Arm and link means, 10...Electric drive means, 1
1, 14...shaft, 12...outer cylinder, 13...
Inner cylinder, 15... electric motor, 16... speed reducer.

Claims (1)

[Scope of utility model registration request] A base part fixed to the leg stand part, a frame part fixed to the seat part placed on the leg stand part, and a frame part of different lengths with one end rotatably supported on the front side of the base part. a pair of arms, a pair of links of different lengths whose one end side is rotatably supported on the rear side of the frame part, and an electric motor that telescopically connects the front side of the base part and the rear side of the frame part. The arm and the link are arranged on the rear side of the short arm and the link, respectively, and the other end of the link is rotatably supported by the long arm, and A seating device comprising a movable seat portion, the other end of which is rotatably supported by a short link.