JP2515550Y2 - Electric lift chair - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat chair that can be electrically moved up and down from a floor or tatami mat to a required height.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 6-90982
The chair can be lifted up and down on the floor with the auxiliary seat on the back.
From the required height to the required height, but guidance in the left-right direction
And the guide in the front-back direction are separate, so the structure is complicated
Since the upper and left guides are in the center, tilt in the left and right directions
When an eccentric load acts on the seat part, including the seat part , the center
Bending stress is generated in the member extending in the Fukutate rail member,
Must fully consider the order flexural strength, also disk
The self-aligning structure of the shaft and nut member is complicated.
There, there is a disadvantage that the cost is high as a whole.

[0003]

The present invention It is an object of the present invention is the floor or tatami
In seat to lift an electric terms to the required height, Noboru
The guide structure for descending is simple , and with the power transmission means
( EN) Provided is an electric lift chair having a simple centering structure related to cooperation .

[0004]

[Means for Solving the Problems] In the electric lift chair of the present invention, the main body of the seat is lifted up and down by a gate-shaped column standing on a pedestal.
In the electric lift chair that guides freely, the chair book
A body with a pair of arms on the back of the left and right sides of the backrest
Overhang, at its left and right ends of the transverse bone between the arm, horizontal
The arm is pivotally supported by a shaft, and the center of the outer surface of each arm
Attach a vertically long rectangular parallelepiped guide piece to the top and bottom of the guide piece.
A pivoting guide roller is pivotally supported around the horizontal axis to support the armrest.
Is made is swingably supported outwardly about a vertical axis, before
A plan in which guide grooves are provided on the inner surfaces of both sides of the column, facing the inner surfaces.
The inner rail, to guide the respective guide piece guide rollers, wherein
It is formed so as to be linked to the power transmission means via the lateral bone .

[0005]

[Operation] The load applied to both arms via the backrest is supported by the upper and lower guide rollers in the longitudinal component.
Component in the lateral direction is supported by the guide piece, component in the vertical direction is supported by the ball screw via the ball nut, also,
When going up and down with the load on the seat chair body (cantilevered state)
The twist due to the longitudinal deflection of the guide rail is due to the horizontal axis.
It is not transmitted to the transverse bone .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The electric chair chair a of the present invention will be described with reference to an embodiment. As shown in FIG. 1, the seat body 1 has a backrest 3 integrated with a seat portion 2 at a required back inclination. , The armrests 4 on both sides of the backrest 3 swingably around a vertical axis.
And a pair of arms 5 are integrally extended on the rear surfaces of the left and right sides, and the horizontal bones 6 are provided on both arms 5 slightly above the central portion in the vertical direction as shown in FIG.
Is rotatably supported by a shaft, and a mounting seat 8 is provided at the center of the transverse frame 6.
The mounting seat 8 is provided with a screw insertion hole 9 in the central portion thereof, and a ball nut 10 is integrally hung on the lower surface thereof. Vertically long rectangular parallelepiped guide piece 1 centered on a vertical line passing through the axis of the fulcrum
1 are joined together, and the guide piece 11 is sandwiched vertically, and the guide rollers 13 are provided on the vertical lines via horizontal shafts 12, respectively.
It is made up of.

On the other hand, the left and right legs 1 of the pedestal 14 having a planar U-shape
The lower ends of the gate-shaped columns 16 are joined to the upper surface of the column 5, respectively, and the guide grooves 13 for guiding the guide rollers 13 and the guide pieces 11 disposed on the arms 5 are formed on the inner surfaces of the columns 16.
A guide rail 18 is opened vertically to face the inner surface, and a bearing seat 20 is provided upright at the center of a connecting seat 19 that connects the left and right legs 15, and a helical gear 21 is mounted on the bearing seat 20. The lower end of the attached ball screw 22 is axially supported, the ball screw 22 is screwed into the ball nut 10, and the upper end thereof is axially supported by a bearing seat that is locked by a lateral beam stretched over both columns 16. The helical gear 24, which is attached to the output shaft of the deceleration motor 23, meshes with the motor, and the entire motion system of these gears is covered with a cover 25.

The electric lift seat a thus constructed is
In the pair of left and right guide rails 18, the seat body 1
Does it retain the front, rear, left and right components of the load
In addition to its compact structure, it can handle eccentric loads in the left-right direction.
Since it is supported at both left and right ends, the guide including the seat body 1
Deflection due to bending strength in the left-right direction of the members that make up the steps
There is no effect and the ascent and descent becomes smooth . Also , guide rail 1
Deflection mainly in the longitudinal direction of 8 is directly caused by the horizontal axis 7.
The ball nut 10 and the ball screw are not transmitted to the horizontal bone 6.
Aligned so that no unnecessary external force is applied to the screwing of 22
There is something . When using the electric lift chair a ,
Since the seat portion 2 of the seat chair body 1 can be used while sitting on the floor or tatami mat, the labor of sitting on the seat is reduced not only when it is used by itself but also when it is handled by a caregiver. Moreover, when sitting down, not only from the front side, but also by opening the armrest 4 to the side, it is possible to sit from either the left or right side. When you operate the lift switch arranged on the lower surface of the armrest 4 in the seated state, the seat chair body 1 gently rises slowly and can be stopped at any height, and at the rising end it automatically stops by the limit switch, When the descent switch is operated, it descends and the limit switch automatically stops at the descent end. Therefore, the seating surface can be easily raised or lowered according to the required posture, such as when eating a meal or watching television, so that the inconvenient physical activity range can be expanded.

[0009]

[Effect of the Invention] As described above, the electric lift seat of the present invention
According to this , the guide structure for raising and lowering the seat chair body is simple.
In addition , the guide structure and the chair body are joined via an arm.
Therefore, the seat body is generally commercially available.
Also can be targeted ones are, furthermore, the power transmission
Since alignment structure according to the integration with means is simple, the whole
As a result, it can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a side view of an electric lift chair a according to the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part in FIG.

[Explanation of symbols]

 1 Seat Chair Main Body 2 Seat Part 3 Backrest 4 Armrest 5 Arm 6 Crossbone 8 Mounting Seat 9 Screw Insertion Hole 10 Ball Nut 11 Guide Piece 13 Guide Roll 14 Pedestal 15 Leg 16 Strut 17 Guide Groove 18 Guide Rail 19 Coupling Seat 20 Bearing Seat 21 Helical gear 22 Ball screw 23 Reduction motor 24 Helical gear 25 Cover a Electric lift chair

Claims (1)

(57) [Scope of utility model registration request] 1. A seat chair main body is mounted on a gate-shaped support stand that stands on a pedestal.
The scent of an electric chair that can be moved up and down by power
The seat chair body on the back of the left and right sides of the backrest.
The booms together and the transverse bones between the arms at the left and right ends
Oite, thereby swingably supported by a horizontal axis, each earth
And engaged vertically long rectangular guide piece of the outer surface center portion of the arm, the
A guide roller that is rotatable around a horizontal axis above and below the guide piece
The armrest is pivotally supported so that it can swing outward around a vertical axis.
The guide grooves on both inner surfaces of the support column.
Guide pieces and guide rollers are installed on the guide rails
An electric lift chair that guides and is linked to a power transmission means through the lateral bone .