JP3514807B2 - Chair - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair, and more particularly to a chair having a swingable seat member.

[0002]

2. Description of the Related Art For example, Japanese Utility Model Publication No. 2-35251 discloses a chair suitable for seating an infant, in which a seat member is swingable with respect to a base member placed on a floor surface. The chair is listed. Briefly, this chair has a structure in which a seat member is suspended from a base member via two rotatable links. The above-mentioned two links are arranged parallel to each other, so that in this chair, the seat member is swung while maintaining its horizontal posture.

On the other hand, Japanese Utility Model Publication No. 5-6847 also discloses a chair for an infant provided with a seat member which is suspended and swingable with respect to a base member via two rotatable links. Have been described. In this chair, the two links are not parallel to each other and the distance between the lower ends of these links is longer than the distance between the upper ends. Therefore, when the seat member is swung, it does not maintain a horizontal posture, but also performs a rocking motion in which the baby's head and feet alternate up and down.

[0004]

As mentioned above, when the seat member is swung, both of the two typical movements imparted to this seat member have their own advantages. The swinging of the seat member while maintaining the horizontal posture of the former does not cause much irritation to the infant, and is therefore suitable, for example, to lay down the infant immediately after finishing breastfeeding. The latter rocking motion, which is similar to the motion given when the mother holds and swings the infant, can be used as a substitute when the mother soothes the infant.

As described above, it is desirable that the mode of rocking to be given to an infant can be changed according to the situation. In addition, it is desirable that the manner of rocking that can be applied be more diverse.

Therefore, it is an object of the present invention to provide a chair that can meet the above-mentioned needs.

[0007]

The chair according to the present invention comprises:
In order to solve the above-mentioned technical problem, a base member placed on a floor surface, an intermediate member that is hung and swingable via a link that is rotatable with respect to this base member, and this intermediate member And a seat member rotatably supported about an axis oriented in the vertical direction.

[0008]

According to the present invention, since the seat member can be rotated about the axis which is oriented in the vertical direction with respect to the intermediate member, when the intermediate member is swung with respect to the base member, the direction of this swing is changed. The angular relationship between the seat and the front-back direction of the seat member can be arbitrarily changed.

[0009]

Therefore, according to the present invention, in one chair, for example, the swinging direction and the front-back direction of the seat member coincide with each other, and the swinging direction and the front-back direction of the seat member are orthogonal to each other. The mode of swinging applied to the seat member can be variously changed, such as the mode of performing the above or an intermediate mode thereof. Therefore, a preferable swing mode can be given to the baby according to the situation of the baby sitting on the seat member. It should also be noted that the various rocking modes described above can be implemented in a single chair. This not only avoids the inconvenience of having to prepare a plurality of types of chairs, but also allows the swing mode to be selected while the infant is seated, and the infants can be placed on other chairs. It also brings the advantage that there is no need to transfer.

In the present invention, preferably, two links are provided as links for suspending the intermediate member with respect to the base member, and means for changing the parallelism of these two links is further provided. With such a configuration, it is possible to selectively realize both a mode in which the seat member swings while maintaining a horizontal posture and a mode in which the seat member swings with a rocking motion. Therefore, it is possible to further diversify the rocking mode that can be applied to the seat member.

[0011]

1 to 7 are diagrams for explaining a chair 1 according to an embodiment of the present invention. Here, FIG.
FIG. 2 is a side view showing the outer appearance of the chair 1, and FIG. 2 is a cross-sectional side view showing the internal structure of the chair 1 shown in FIG. 1, showing a typical swing mode with imaginary lines. FIG. 3 is a sectional view taken along the line III-III in FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 5, 6 and 7 each show a swing mode different from the swing mode shown in FIG.

The chair 1 is used for infants, and has a base member 2 placed on the floor, a seat member 3 for seating an infant, and an intermediate member interposed between the base member 2 and the seat member 3. The member 4 is provided.

More specifically, the base member 2 is provided with a flange portion 5 in contact with the floor surface and a raised portion 6 protruding upward from the central portion of the flange portion 5. Two links 7 and 8 extending in an inverted U shape are arranged on the upper surface of the ridge 6, and these links 7 and 8 are rotated by bearing members 9 and 10 attached to the upper surface of the ridge 6, respectively. Be movably supported. Each end of each of links 7 and 8 is
Oriented horizontally.

The intermediate member 4 is suspended from the base member 2 via links 7 and 8 and is swingable. That is, the intermediate member 4 has an inverted U-shaped cross section,
It is arranged so as to cover the raised portion 6. The lower end of the intermediate member 4 is provided with bearing holes 11 and 12 for receiving the respective ends of the links 7 and 8 described above. Bearing hole 1
1 and 12 form inner recesses 13 and 14 and outer recesses 15 and 16, respectively, with each end of links 7 and 8 being selected as either inner recesses 13 and 14 or outer recesses 15 or 16. Can be fitted together. In addition, each end of the links 7 and 8 is
As shown in FIGS. 1-5, the inner recesses 13 and 14
, The two links 7 and 8 are parallel to each other. On the other hand, when the ends of the links 7 and 8 are fitted into the outer recesses 15 and 16, as shown in FIGS. 6 and 7, the distance between the lower ends of the links 7 and 8 is made longer than the distance between the upper ends.

The seat member 3 includes a seat portion 17 and a backrest portion 18.
And a footrest 19. The backrest 18 may be reclining, as shown in phantom in FIG. The seat portion 17 is arranged above the intermediate member 4 described above.

More specifically, a circular table 20 is provided on the upper portion of the intermediate member 4, and a cylindrical rib 21 surrounding the circular table 20 is formed on the lower surface of the seat portion 17. A through hole 22 is provided in the center of the table 20, and a shaft 23, which is received in the through hole 22 and is oriented in the vertical direction, is provided on the lower surface of the seat 17. A flange 24 is provided at the lower end of the shaft 23 to prevent the shaft 23 from coming off the through hole 22. In this way, the seat member 3
Are rotatably supported about an axis 23 oriented vertically with respect to the intermediate member 4. In order to make this rotation smoother, ribs 25 are formed around the circular table 20 to reduce the contact area with the seat portion 17. A rolling bearing may be used for such a rotatable support portion.

In the following, some typical rocking modes that can be applied to the seat member 3 in the chair 1 thus configured will be described.

First, as shown in FIGS. 1 to 4, the ends of the links 7 and 8 are fitted into the inner recesses 13 and 14 of the bearing holes 11 and 12, and the links 7 and 8 are rotated. When the direction of and the front-back direction of the seat member 3 coincide with each other, as shown by a solid line and an imaginary line in FIG.
The seat member 3 is swung while maintaining a horizontal posture, and this swing is applied in the front-back direction of the seat member 3.

Next, as shown in FIG. 5, the seat member 3 is
90 with respect to the intermediate member 4 from the state shown in FIGS.
When rotated once, the seat member 3 is swung while maintaining the horizontal direction, and this swing is given in the width direction of the seat member 3.

Next, in the states shown in FIGS. 6 and 7, the ends of the links 7 and 8 are fitted in the outer recesses 15 and 16 of the bearing holes 11 and 12, respectively. Therefore, the distance between the lower ends of the links 7 and 8 is made longer than the distance between the upper ends.

In the above state, as shown in FIG.
When the directions of rotation of the links 7 and 8 and the front-back direction of the seat member 3 coincide with each other, the seat member 3 swings with a rocking motion, and this swing is given in the front-back direction of the seat member 3. .

On the other hand, as shown in FIG. 7, when the front-rear direction of the seat member 3 is oriented in the direction orthogonal to the direction of rotation of the links 7 and 8, the seat member 3 swings with a rocking motion. This swinging is applied in the width direction of the seat member 3.

As described above, according to the chair 1 of this embodiment, typically, four types of swing modes can be realized. Since the seat member 3 can be oriented in any direction with respect to the intermediate member 4, the swinging mode is not limited to the four typical modes described above, and can be further diversified.

Further, in the above-described embodiment, the parallelism of the two links 7 and 8 can be changed in two steps of the parallel state and the non-parallel state, but the parallelism is formed in the bearing holes 11 and 12. The degree of non-parallelism in the non-parallel state may be adjusted in multiple stages by increasing the number of recesses or increasing the longitudinal dimension of the bearing holes 11 and 12. Further, in the non-parallel state, the links 7 and 8 are
Although the distance between the lower ends of the above is made longer than the distance between the upper ends, conversely, the distance between the upper ends may be made longer than the distance between the lower ends. Furthermore, the parallelism of the two links 7 and 8 is shown in FIG.
May not be modifiable, as described below with reference to.

FIG. 8 is a view corresponding to FIG. 1, showing a chair 1a according to another embodiment of the present invention. In FIG. 8, elements corresponding to those shown in FIG. 1 are designated by the same reference numerals, and redundant description will be omitted.

In the chair 1a shown in FIG. 8, the respective ends of the links 7 and 8 are received in the bearing holes 11a and 12a provided at the lower end of the intermediate member 4 so as not to change their positions. ing. Therefore, the parallelism of the two links 7 and 8 is fixed. The parallelism of such two links 7 and 8 may be parallel or non-parallel to each other.

Although the present invention has been described above with reference to the illustrated embodiments, several other modifications are possible within the scope of the present invention.

For example, the links are not limited to the inverted U-shape like the links 7 and 8 shown in the figure, and any other link can be used as long as the intermediate member can be swingably suspended with respect to the base member. It is also possible to replace with the one of the form.

Although not specifically described in the above-mentioned embodiment, a mechanism for selectively inhibiting the rotation of the seat member 3 with respect to the intermediate member 4 and the swinging of the intermediate member 4 with respect to the base member 2 is provided. May be.

Although the chair 1 or 1a described above is intended for an infant, the present invention is not limited to an infant, but can be applied to an adult chair, for example.

[Brief description of drawings]

FIG. 1 is a side view showing a chair 1 according to an embodiment of the present invention, showing a state in which the swing of the first mode can be realized.

FIG. 2 is a cross-sectional side view showing the internal structure of the chair 1 shown in FIG. 1, showing in a phantom line the rocking of the first mode that the chair 1 can provide.

FIG. 3 is a sectional view taken along the line III-III in FIG.

4 is a cross-sectional view taken along the line IV-IV in FIG.

FIG. 5 is a view corresponding to FIG. 2 and shows, in an imaginary line, the swinging of the second mode which the chair 1 can give.

FIG. 6 is a view corresponding to FIG. 2 and shows, in an imaginary line, the swinging of a third mode which the chair 1 can give.

FIG. 7 is a view corresponding to FIG. 2 and shows, in an imaginary line, the swinging of the fourth mode which the chair 1 can give.

FIG. 8 shows a chair 1a according to another embodiment of the present invention,
It is a figure equivalent to FIG.

[Explanation of symbols]

1,1a chair 2 Base member 3 seat members 4 Intermediate member 7,8 links 11,12,11a, 12a Bearing hole 13, 14 Inner recess 15, 16 Outer recess 20 tables 21 ribs 22 through hole 23 axes

Claims (2)

(57) [Claims] 1. A base member placed on a floor surface, an intermediate member which is hung and swingable via a link rotatable with respect to the base member, and a vertical direction with respect to the intermediate member. A seat member rotatably supported about an axis facing the chair. 2. The chair according to claim 1, further comprising: two links, further comprising means for changing parallelism of the two links.