JPS6343966Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of the backrest of a seat chair, reclining chair, chair for pine surgery, etc. To explain in more detail, the inclination angle adjustment portions formed near both sides of the seat portion, The present invention relates to the structure of a backrest of a seat chair, etc., including a pair of arms rotatably supported by the inclination angle adjustment part, and a backrest body attached to the pair of arms.

Conventionally, the backrests of seat chairs, reclining chairs, chairs for pine surgery, etc. have had their inclination angles selectively changed through various inclination angle adjustment mechanisms, or in chairs for pine surgery. The position of the pine surge device can be moved in the vertical direction.

However, although conventional chairs can be folded, they cannot be used with the backrest extended in a straight line with respect to the seat, and only one side of the backrest can be used. First, the backrest itself cannot be used by flipping it over to change the front and back sides, and furthermore, the backrest itself can only be used from one direction, and cannot be used from either the front or back. A chair for pine surge, etc. has a drawback that the pine surge device cannot be easily moved up and down with a simple structure.

The purpose of the present invention is to allow the seat and backrest to be extended in a straight line from the normal sitting position and to be used as a bed. If you use a backrest with a pine surge device installed on one side of the backrest, you can use the pine surge device selectively, and the backrest can be used from either the front or rear direction of the seat. The purpose of the present invention is to provide a structure for a backrest of a chair, etc., which allows the vertical position of the backrest body to be adjusted extremely easily.This will become clear from the detailed description below with reference to the drawings.

FIG. 1 shows an outline of an embodiment in which the structure of the backrest of a seat chair or the like according to the present invention is applied to a seat chair. A seat 2 is formed, and a backrest main body 5 is attached to the seat 2 via a pair of arms 3 that are rotatably attached, and the lower portions of the arms 3 are attached to both sides of the seat 2. It is rotatably attached to an inclination angle adjustment part 6 formed near the center, and the upper part of the arm 3 is selectively locked to a vertical position adjustment part 7 formed on the side of the backrest main body 5 and extending in the vertical direction. It is made to be done.

As shown in FIG. 2, the inclination angle adjustment section 6 includes first and second arm receiving sections 11 and 1, which are made of through holes formed at appropriate intervals in the vertical direction of the substrate 8.
2, and the first and second arm receiving parts 11 and 1
and a guide groove 13 formed between two
A pair of stoppers 14 and 15 are formed on both left and right sides of the guide groove 13. In this embodiment, the center line P connecting the arm receiving parts 11 and 12 is
The distances l ₁ and l ₂ to the stoppers 14 and 15 are
l ₁ < l ₂ , and the inclination angles θ 1 and θ 2 when the arm 3 is tilted back and forth while engaged with the arm receiving part 11 are θ ₁ > θ 2, and the inclination angles θ 1 and θ ₂ are θ ₁ >θ ₂ , and It is formed to be able to support the arm 3.

Furthermore, if one or both of the stoppers 14 and 15 is formed so that it can be selectively inserted into the adjustment groove 17 formed in the vertical direction or the horizontal direction of the base plate 8, the inclination angle of the arm 3 can be freely adjusted. This can be selected.

As schematically shown in FIG. 3, the backrest main body 5 is formed with a cushion pad attached to its outer periphery, and a gussage device 21 is provided in the lower half (or upper half) of one side of the backrest main body 5. ing.
The pine surge device 21 may be one that generates vibrations or an electrostatic treatment device such as an ion generator. Vertical position adjustment parts 7 are formed on both sides of the backrest main body 5, and this vertical position adjustment part 7 has an engagement groove 22 extending in the vertical direction. An engaging portion 23 made of an engaging pin or the like is inserted.

Therefore, the backrest main body 5 is rotatably supported around the engagement part 23, and the engagement groove 2 of the vertical position adjustment part 7
If the backrest main body 5 is pivoted at one end of the engagement groove 22 and the pine surge device 21 is located in the lower half, the backrest main body 5 is rotated by half a turn and pivoted at the other end of the engagement groove 22. It will be pivoted in an inverted state, and the position of the pine surge device 21 can be changed to the upper half.

A protrusion 25 that can selectively engage with the first and second arm receiving parts 11 and 12 of the inclination angle adjustment part 6 is formed at the lower part of the arm 3.
5 is formed to have a substantially rectangular cross section so that it can slide in the guide groove 13, and when the arm 3 is at a predetermined inclination angle, that is, the long side of the protrusion 25 is in the guide groove 1.
3, the arm can be moved from either of the first and second arm receiving parts 11 and 12 to the other by passing through the guide groove 13.

4A and 4B show different embodiments of the vertical position adjusting portion 7, and these vertical position adjusting portions 7 further include a plurality of engaging grooves 22' along the longitudinal direction of the engaging groove 22. By selecting one of the plurality of engagement grooves 22' and locking the engagement portion 23 on the upper part of the arm 3, the backrest main body 5 can be held by adjusting the vertical position. It is.

The above is the configuration of one embodiment of the structure of the backrest of a seat chair or the like according to the present invention. As shown in FIG. From the state in which the protrusion 25 engages with the first arm receiving part 11 and the inclination angle is regulated by the stopper 15, the state shown in the imaginary line, that is, the seat part 2 and the backrest main body 5 are extended linearly. When placing the arm 3 in the bed state, the protrusion 25 of the arm 3 is set in a substantially vertical state, passes through the guide groove 13 and engages with the second arm receiving part 12, and the arm 3 is tilted from the vertical state to the horizontal state. In this case, the stopper 15 is located at the lower part of the arm 3, and the tilting is not prevented.
By moving the backrest main body 5 in a direction away from the seat part 2 so as to be located at one end, the seat part 2 and the backrest main body 5 can be extended linearly to form a bed state.

Next, if you want to increase the pine surge effect by changing the height of the pine serge device 21 from the state where the pine surge device 21 is in the upper half of the backrest main body 5, select the engagement groove 22' of the vertical position adjustment part, Alternatively, the backrest main body 5 may be reversed, and the arm 3 may be engaged with a different stopper 14 while the arm 3 remains engaged with the first arm receiving portion 11, and the seat portion 2 may be
By using the pins from different directions, the pine surge device 21 can be used at various height positions. In addition,
If the pine surge device 21 is not used, a different surface of the backrest body 5 may be used.

According to the present invention, the backrest main body can be used at an appropriate inclination angle in a normal sitting state, and the backrest and seat can be extended in a straight line to be used as a bed. The vertical position of the backrest itself and the vertical position of the backrest body itself can be changed as appropriate, the backrest body can be reversed to change the front and back sides, and the arms can be rotated without reversing the backrest body. If the rotation is restricted using the stopper, the backrest body can be used from either the front or the back.

In the above embodiment, the backrest main body 5 is rotatably supported by the engagement portion 23 on the upper part of the arm 3, so even if the backrest main body 5 is supported by the arm 3 at various inclination angles, the backrest is always fixed. Main body 5
Although the arm 3 is held in a substantially vertical state, it can also be held so that it can be tilted according to the inclination of the arm 3.

[Brief explanation of drawings]

1 to 3 each schematically show an embodiment in which the structure of the backrest of a seat chair or the like according to the present invention is applied to a seat chair, and FIG. 1 is an explanatory side view; Fig. 2 is an enlarged explanatory view of one embodiment of the inclination angle adjustment section, Fig. 3 is an exploded perspective view of the backrest main body and arm, and Fig. 4 A and B show different embodiments of the engagement groove of the vertical position adjustment section. FIG. In the figure, 1... Seat chair, 2... Seat, 3... Arm, 5... Backrest body, 6... Inclination angle adjustment section, 7... Vertical position adjustment section, 8... Board, 11,
12...Arm receiving part, 13...Guide groove, 14,
15... Stoppa, 21... Pine surge device, 2
2, 22'...Engagement groove, 23...Engagement portion, 25...
…protrusion.

Claims (1)

[Claims for Utility Model Registration] (1) An inclination angle adjustment section formed near the center of both sides of the seat, a pair of arms rotatably supported by the inclination angle adjustment section, and a pair of arms rotatably supported by the inclination angle adjustment section; In the structure of a backrest of a seat chair or the like, which is provided with a backrest main body attached to an arm, a pine surge device that can be selectively used is disposed on one side of the backrest main body, and the inclination angle adjustment part is arranged vertically. The arm comprises a pair of upper and lower arm receivers formed at appropriate intervals, a guide groove formed between the arm receivers, and a pair of left and right stoppers for regulating rotation of the arm. A protrusion is formed at the lower part of the pair of arm receivers to engage the arm receiver and pass through the guide groove only when the arm is at a predetermined inclination angle. By engaging the pair of arms and supporting either of the pair of left and right stoppers, the backrest main body can be tilted at different inclination angles in any direction in the front and back direction, and the protrusion A structure of a backrest of a chair, etc., characterized in that the backrest body can be used by extending the backrest body in a straight line with the seat part by engaging the upper arm receiving part. (2) The pine surge device is provided at the upper or lower part of the backrest main body excluding the central part, and a vertical position adjustment part having an engagement groove extending in the vertical direction is formed on a side part of the backrest main body, and the vertical position adjustment part The upper part of the arm is selectively locked in the engagement groove of the arm to adjust the vertical position of the backrest body and also to change the front and back sides of the backrest body with respect to the seat part, and the pine surge device The structure of a backrest of a seat chair, etc., as claimed in claim 1, which is characterized in that it can be used in different positions.