JPH0439721Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an easy chair, and particularly to an easy chair that has three functions: a reclining function, a seat raising/lowering function, and a footrest raising/lowering function.

BACKGROUND TECHNOLOGY In general, easy chairs such as sofas have a seat, a backrest provided behind the seat, and siderests on which to place both hands and arms, so that a person can sit as comfortably as possible. It is a device. Furthermore, easy chairs are provided that are equipped with footrests so that the legs can be rested, and some are equipped with a reclining mechanism that allows the backrest to be tilted appropriately.

Problems to be Solved by the Invention However, since most of the conventional easy chairs have a fixed and stationary configuration, they tend to be unsatisfactory in terms of comfort for the human body. In particular, when an elderly person or a physically disabled person uses an easy chair in their daily life, it is difficult for them to sit down or stand up by themselves without the assistance of another person.

Means for Solving the Problems The present invention aims to solve the above problems, and provides an easy chair in which a backrest, a seat, and a footrest are movably attached to a legrest. a first link mechanism connected between the footrest and the seat; a first drive device extendable and retractable between the footrest and the seat; A seat support frame that abuts and supports, a second link mechanism that is connected between the seat frame and the footrest and lifts the footrest upward, and a link mechanism between the second link mechanism and the backrest. a connecting rod that is connected to the backrest portion and rotates the second link mechanism; a lever that is connected to the link mechanism and rotates the second link mechanism to move it upward;
A second drive device is provided extendably and retractably between the lever and the backrest and rotates both, and the first drive device operates the first link mechanism, and The seat part is tilted forward and raised on the footrest part, and the front part of the seat part is lifted upward while the backrest part is tilted rearward by the second driving device, and To provide an easy chair, characterized in that the chair can be lifted up while rotating so as to push the seat part forward.

Effects According to the above configuration of the present invention, when the first drive device is operated, the seat section tilts forward with the seated person on it via the first link mechanism, rises to a predetermined height, and then stops. . On the other hand, when the second drive device is operated, the backrest tilts rearward at a predetermined angle via the second link mechanism, the front part of the seat part is lifted slightly upward, and the front part of the seat part The footrest, which has been stored in a vertical position, rises to a substantially horizontal position in front of the seating area.

Embodiment The present invention will be described below with reference to an illustrated embodiment. Fig. 1 is a perspective overall view, Fig. 2 is a vertical cross-sectional side view showing the first link mechanism and the first drive device, and Fig. 3 is a longitudinal side view showing the first link mechanism and the first drive device.
The figure is a plan view of Fig. 2, Fig. 4 is a side view of the main part showing the operation of Fig. 2, Fig. 5 is a side view of the main part showing the second link mechanism and the second drive device, and Fig. 6 is a perspective external view of FIG. 5;

As shown in FIG. 1, the present invention is implemented in an easy chair 1 such as a sofa. A plate 5, which also serves as a footrest, is movably attached to the top and bottom, and the overall structure is similar in appearance to a traditional sofa. The leg rest 2 supports the weight of the seated person by placing the seat 4 thereon, and the backrest 3 is rotatably fixed to the frame of the seat 4 to support the back of the seated person. Then, the seat part 4 makes a first movement while tilting forward and rising to a predetermined height and stopping, while the front part is tilted slightly rearward and lifted in conjunction with the backrest part 3 and footrest 5. Second
You can do the following exercises. The first and second movements are performed independently, and the first link mechanism and the first drive device and the second link mechanism and the second drive device are housed in the leg base section 2. There is.

First, the configuration for performing the first movement of the seat portion 4 will be explained. As shown in FIG. 2, the seat part 4 has a base part 7 fixed to the upper surface of the leg stand part 2, and a frame part 8 fixed to the seat part 4. Base part 7
As shown in FIG. 3, the metal fittings 7 are made of a pair of angle members and are placed on the 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 or the like.
a, 7a, a reinforcing rod 7b such as a pipe connected and fixed between the metal fittings 7a, 7a, and a pair of brackets 7 protruding downward from approximately the center of the reinforcing rod 7b.
It consists of c and 7c. On the other hand, the frame part 8 consists of a fixing plate 8a fixed to the substantially central part of the back surface of the seat part 4 with a wood screw, etc., and vertical bent parts 8b, 8b formed by bending the left and right ends of the fixed plate 8a downward, and its tail end. It consists of integrally formed brackets 8c, 8c. First link mechanisms 9, 9 are pivotally supported and connected to the base portion 7 and the frame portion 8, respectively, in a bilaterally symmetrical configuration. To explain one of the first link mechanisms 9, 9 with reference to FIG. 2, it includes an arm 9a whose one end is pivotally supported by the reinforcing rod 7b, and the bracket 7c.
An arm 9b whose one end is pivotally supported and a vertically bent portion 8b
A link 9c has one end pivotally supported and the other end pivotally supported at the tip of the arm 9a and approximately the center of the arm 9b, respectively, and a link 9c having one end pivotally supported approximately at the center of the vertical bent portion 8b and the other end and a link 9d pivotally connected to the tip of the arm 9b. The first link mechanism 9 consisting of an arm and a link means is made of a metal pipe, but may be made of a metal plate. Furthermore,
A first electric drive device 10 is provided between the brackets 7c and 8c. This drive device 10 has brackets 8c, 8c at one end.
It consists of an outer cylinder 12 that is pivotally supported and connected to a shaft 11 that is bridged in between, and an inner cylinder 13 that is coaxially fitted with the outer cylinder 12 and inserted telescopically.
One end is pivotally supported and connected to a shaft 14 bridged between the brackets 7c, 7c. On the other hand, in the inner cylinder 13, an electric motor 15 capable of rotating in both forward and reverse directions is installed in the reducer 1.
They are integrally connected via 6. 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 telescoping guide 18 is screwed into the free end of the screw shaft 17, and this telescoping guide 18 is connected to the inner cylinder 13.
It is integrally formed with or fixed by welding, etc. 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 and 20 are fixed to the fitting end of the outer cylinder 12 and are opposed to each other in the diametrical direction. 21 and 22 are brought into contact with the circumferential surface of the inner cylinder 13. On the other hand, the actuating pieces 21 and 22 are depressed at both ends of the inner cylinder 13, and the limit switch 1 is
Holes 23 and 24 for turning 9 and 20 off are provided in a protruding manner, respectively.

To explain the operation of the first link mechanism, when a person sits on the seat 4 as in a normal chair,
The seat portion 4 is maintained in a horizontal position. 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 first link mechanisms 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, opens the forward rotation circuit, and motor 1
5 is turned off, and the movement of the frame portion 8 is stopped at the upper limit. At this time, the frame part 8 is tilted forward at a predetermined angle above the base part 7 by the first link mechanism 9, as shown in FIG. stands,
It corresponds to the height of the waist. Therefore, the seated person can stand up on the floor or the like by stretching his or her legs. Furthermore, when the seat 4 is to be seated again after having been moved in this manner, when the reversing switch of the electric motor 15 is turned on, the screw shaft 17 rotates in the opposite direction to the above, and the outer cylinder 12 and the inner cylinder 13 are rotated. The overall length is reduced, so that the frame portion 8 is in a horizontal position so as to overlap the base portion 7. At this time, the actuating piece 22 of the limit switch 20 falls into the hole 24, opening the reversing circuit, and the electric motor 15 stops rotating. That is, since the lower limit of the movement of the frame part 8 is determined, the frame part 8 becomes a horizontal position as shown in FIG. 2, and the seat part 4 returns to a horizontal state in which the user can sit on it again.

Next, a configuration for performing the second movement of the seat portion 4 will be explained. As shown in Figures 5 and 6,
Seat support frame 30 that abuts and supports the lower periphery of the seat portion 4
is provided, and is pivotally supported near the rear end of the seat support frame 30 to rotatably connect the backrest portion 31 with a shaft 32. The lower end of the backrest 31 is extended downward, and a bracket 33 is fixed near the front end of the seat support frame 30. Further, a bracket 34 is fixed to the plate 5 which also serves as a footrest. And, between the brackets 33 and 34, there is a second bracket which can be bent into a substantially dogleg shape.
The ends of the links 35 are pivoted and rotatably connected. The second link 35 is the bracket 33
A pair of rods 38 and 39 such as hollow pipes are connected to each other by shafts 36 and 37, and a shaft 40 is connected to the bracket 34.
A rod 4 such as a pair of hollow pipes connected by 41
The shafts 44, 45, 46, 4 can be rotated with 2, 43.
It is connected by 7. One end of a connecting rod 49 made of a hollow pipe is connected to the rod 39 via a shaft 48, and the other end of the connecting rod 49 is rotatably connected to the lower end of the backrest portion 31 by a shaft 50. do. Further, one end of a lever 52 is rotatably connected to the rod 39 through a shaft 51 above the shaft 48, while a shaft 53 is connected to the other end of the lever 52.
The lever 52 is connected at a predetermined angle through the lever 52a, which is always maintained at a predetermined angle. Axis 5
3 is rotatably supported by the leg base 2. On the other hand, a second drive device 55 is connected between the lower end of the lever 52a and the lower end of the backrest 31 via shafts 50 and 54.
is interposed. This drive device 55 is similar to the first drive device 10, in which the rotation of an electric motor 56 is controlled through a decelerator 57, a screw shaft 58 is screwed into a telescoping guide 59, and an inner cylinder 6 to which the telescoping guide 59 is fixed is connected.
The outer cylinder 61 to which the screw shaft 58 is fixed can be expanded and contracted in the axial direction. In addition, in order to stop the expansion and contraction strokes of the inner cylinder 60 and the outer cylinder 61 within a certain range, a limit switch (not shown) is provided similarly to the first drive device 10.

Next, the action (second movement) of the second link mechanism and the second drive device will be explained. Fifth
In the figure, an electric motor 56 is rotationally driven via a switch that operates a second drive device 55, and an inner cylinder 6
0 and the outer cylinder 61 is reduced, the backrest 31 rotates clockwise around the shaft 32 as shown by the phantom line, and the backrest 3 falls backward. The rod body 39 rotates clockwise in the drawing about the shaft 37 via the connecting rod 49. On the other hand, the inner cylinder 6
0 and the outer cylinder 61 is reduced, the lever 52
Since the rods 39 and 52 cannot be rotated counterclockwise around the shaft 53, the rod 39 is pushed by the connecting rod 49 and the lever 52 and can easily rotate clockwise around the shaft 37. Since the rod 39 is moved upward by the lever 52, the seat support frame 30 rotates clockwise in the figure about the shaft 32 with the backrest 31, thereby lifting the front part of the seat 4. and,
The rods 38 and 39 rotate clockwise in the figure in parallel around the shafts 36 and 37, respectively.
The rods 42 and 43 are rotated clockwise in the drawing so as to be pushed forward through the rods 5, 46, and 47. Therefore, the plate 5, which also serves as a footrest, is lifted from the vertical position to a height approximately equal to that of the seat portion 4. Thus,
As shown by imaginary lines in FIGS. 1 and 5, the backrest 3, seat 4, and plate 5 rotate, and by stretching your body and placing your feet on the plate 5, you can comfortably sit in a comfortable sitting position. can be taken. Then, in order to return each part to the normal state shown by the solid line, the electric motor 5 of the drive device 55
When the fitting length of the inner tube 60 and the outer tube 61 is extended by driving the inner tube 60 and the outer tube 61 in reverse rotation with the operation switch, each part moves in the opposite direction to the above and returns to the normal state.

Effects of the invention According to the invention described above, the first movement in which the seat portion is lifted upward and tilted forward;
The second stage, in which the front part of the seat part is lifted upward, the backrest part is tilted backward, and the footrest is raised.
The easy chair can be operated as desired, so elderly people and disabled people can stand up on their own without the assistance of others, and the seated person can tilt the backrest backwards when desired. If you want to stretch your legs and take a comfortable posture, the front part of the seat lifts upwards to prevent your lower back from shifting, and the footrest rises to create a comfortable position for resting your legs. One easy chair has multiple functions and is suitable for the elderly and the handicapped. In addition, as the backrest is tilted,
By lifting the front part of the seat upwards,
Because it supports the thighs of the seated person,
Reduces leg fatigue and improves comfort. moreover,
The footrest is separated from the seat and can be rotated and lifted upwards to push it forward, so when you are normally sitting or when you stand up, the footrest can be stored inside the easy chair so that it does not get in the way. The footrest only pops out of the easy chair when the chair is in the comfortable position. Therefore, the footrest does not get in the way and has beneficial effects such as ease of use.

[Brief explanation of the drawing]

Fig. 1 is a perspective external view, Fig. 2 is a vertical cross-sectional side view showing the first link mechanism and the first drive device, Fig. 3 is a plan view of Fig. 2, and Fig. 4 shows the operation of Fig. 2. A side view of the main part to be explained, FIG. 5 is a side view of the main part showing the second link mechanism and the second drive device, and FIG.
FIG. DESCRIPTION OF SYMBOLS 1... Easy chair, 2... Leg rest, 3... Backrest, 4... Seat, 5... Plate that also serves as a footrest, 9... First link mechanism, 10... First drive Device, 30... Seat support frame, 31... Backrest, 35
...Second link mechanism, 49...Connection rod, 52,
52a...Lever, 55...Second drive device.

Claims (1)

[Scope of utility model registration request] An easy chair in which a backrest, a seat, and a footrest are movably attached to a legrest, comprising: a first link mechanism connected between the legrest and the seat; a first drive device that is extendable and retractable between the base and the seat; a seat frame that abuts and supports the lower periphery of the seat; and a first drive that is connected between the seat frame and the footrest. , a second link mechanism that lifts the footrest upward;
a connecting rod that is connected between the second link mechanism and the backrest part and rotates the second linkage mechanism in conjunction with the backrest part; a lever that is rotatably supported by the section and connected to the second link mechanism and moves the second link mechanism upward while rotating; and a lever between the lever and the backrest section; and a second drive device that is extendable and retractable and rotates both of them, and the first drive device causes the first drive device to rotate the first drive device.
The link mechanism is actuated to raise the seat part while tilting it forward on the footrest part, and the front part of the seat part is tilted backward by the second driving device. 1. An easy chair, characterized in that the easy chair is lifted upward, and the footrest is rotated so as to be pushed forward of the seat.