JPH085643Y2 - Chair - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a chair whose seat portion height can be adjusted, and more particularly to a structure suitable for a child-care chair for sitting an infant. .

[Prior Art] Conventionally, as a chair used for childcare, there is a chair configured such that a seat portion thereof is at a relatively low position and a backrest portion provided in the seat portion can recline. The reclining of the backrest enables the seat part to be transformed into a bed, so that such a child-care chair can be used even when an infant cannot sit still.

[Problems to be solved by the invention] By the way, recently, Western-style households are increasing. Therefore, the caregiver often sits in a chair. In this way, if the caregiver is sitting in a chair or doing a standing job,
When an infant is placed in a chair with a low seat as described above, there is a problem that the face of the infant and the face of the caregiver are separated from each other, making it difficult to carry out important communication for childcare.

However, in order to solve the above-mentioned problem, it is not possible to simply increase the height of the seat portion of the child-care chair. For example,
When using between Japan, when it is desired to keep sleeping infants safely, etc., it is convenient that the seat portion is as low as possible.

Therefore, it is an object of the invention to provide a height adjustable chair in order to meet the needs mentioned above.

[Means for Solving the Problem] First, a chair according to the present invention includes a pair of side walls located on both sides of a seat portion. A pair of side bars extending horizontally and parallel to each other is fixed to each side wall.
A pair of first leg members is attached rotatably to each side wall. A pair of sliders is attached to each side bar so that the slider can slide along the side bar. A pair of second leg members is rotatably attached to each slider. The intermediate portion of each of the second leg members is rotatably connected to the intermediate portion of each of the first leg members described above.

In addition, a plurality of engagement holes are formed in each side bar so as to be distributed in the length direction. Each slider is provided with a rotatable operating lever having at one end an engaging projection for engaging a selected one of the plurality of engaging holes. The operating lever is biased by a spring so that the engaging protrusion is rotated in a direction in which the engaging protrusion engages with the engaging hole.

The operation lever may be provided so as to penetrate the side wall. Therefore, the side wall is provided with a through hole that penetrates the operation lever and extends in a range that allows the rotation of the operation lever. In such a case, it is preferable that a lock member that selectively inhibits the rotation of the operation lever by filling a gap of the operation lever in the through hole is operably attached to the operation lever, for example.

[Operation] In the chair described above, each slider slides on each side bar to change the intersection angle formed by the first leg member and the second leg member. Thereby, the height of the pair of side bars is changed, and the seat portion changes the height. In this way, the height of the seat portion changed according to the slide of the slider is determined by selecting the engagement hole provided in each side bar with the engagement protrusion provided in the operation lever attached to each slider. Is fixed by engaging with. Also,
When the operation lever is pivoted so that the engaging protrusion is released from the engaging hole, each slider becomes ready to slide on each side rod as described above.

[Effects of the Invention] As described above, according to the present invention, it is possible to obtain the chair in which the height of the seat portion can be adjusted.

Although such a chair structure can be applied to an adult chair, it is more advantageous when applied to a child-care chair especially for infants.

When this device is applied to a child-care chair, by adjusting the height of the seat according to the posture of the child-rearing person,
The face of the infant and the face of the child-rearing person can be placed at an appropriate distance, which facilitates communication important for childcare.

Further, if the seat portion is raised, the child-rearing person can comfortably perform breast-feeding and diaper change while sitting on the chair or standing. In addition, when the seat portion is kept high in this way, the baby is kept away from dust and dust on the floor surface, and thus a hygienic environment can be provided to the baby.

In addition, by lowering the seat portion, it is possible to adopt a form suitable for use between Japan and for safely sleeping a sleeping infant.

Further, in this invention, in order that the slider is selectively fixed at a plurality of positions on the side rod, the engaging protrusion provided on the operation lever is engaged with the engaging hole formed in the side rod. The configuration is adopted. Moreover, the operation lever is biased by the spring so as to rotate in the direction in which the engagement protrusion engages with the engagement hole. Therefore, the operation in which the engagement protrusion engages with the engagement hole can be automatically achieved, so that the height adjustment operation is facilitated and the state after the height adjustment can be firmly maintained. Therefore, excellent safety can be realized.

In addition, the operation lever is provided so as to penetrate the side wall, the side wall is provided with a through hole extending in a range allowing the operation lever to penetrate and the rotation of the operation lever, and the lock member
If the operation lever is provided so as to selectively inhibit the rotation of the operation lever by filling the gap of the operation lever in the through hole, the operation of the operation lever may cause the operation lever to be inadvertently rotated. Is prevented. Therefore, a chair with higher safety can be obtained. Further, in this way, if the lock member can prevent an inadvertent rotation operation with respect to the operation lever, even if the portion of the operation lever operated by hand is made large or is made to largely protrude from the side wall. Therefore, something touches the operating portion of the operating lever, which prevents the operating lever from being unintentionally turned by accident. Therefore, the operation portion of the operation lever can be provided in a mode that is easy to operate without any problem.

[Embodiment] The drawings are for explaining a child-care chair 1 as an embodiment of the present invention.

With respect to the seat part 2 of the child-care chair 1, its raised position is shown in FIG. 1 and its lowered position is shown in FIG. FIG. 3 shows the main part of the seat portion 2 of the child-care chair 1 in the state of FIG. 4 and 5 are sectional views of the portion shown in FIG. 3, respectively. In these FIGS. 4 and 5, to the left of the line C, the line A-A in FIG. A cross section along is shown, to the right of line C,
A cross-section along line BB in FIG. 3 is shown. 4 shows a state in which the lock for the rotation of the operation lever 3 is released, and FIG. 5 shows a state in which the operation lever 3 is locked so as not to rotate.

As shown in FIGS. 1 and 2, the seat portion 2 includes a seat portion 4 and a backrest portion 5. As can be seen by comparing FIG. 1 and FIG. 2, the backrest portion 5 can change its inclination angle, that is, can recline.
The backrest 5 can also have an intermediate inclination angle between the state shown in FIG. 1 and the state shown in FIG.

Side walls 6 are located on both sides of the seat portion 4. A footrest 7 is provided so as to extend downward from the front end of the seat portion 4.

The child-care chair 1 basically has a bilaterally symmetrical structure. Therefore, most of the elements shown in FIGS. 1 to 5 are provided in pairs on the left and right.

The side wall 6 has an inverted U-shaped cross section as a whole,
Each of the pair of side walls 6 has an inner portion shown in FIGS.
As shown in the figure, the side bar 8 extending in the horizontal direction is fixed. The pair of side bars 8 are arranged in parallel with each other.
The side bar 8 is made of, for example, a pipe having a quadrangular cross section, and is distributed in the length direction thereof, and a plurality of, for example, eight engaging holes 9a to
9h is formed.

As shown in FIGS. 1 and 2, a bracket 10 is provided at the rear end of each side wall 6, and the bracket 10 is provided with a pair of first leg members 11 via a pin 10a. Each is rotatably mounted. Between the pair of first leg members 11, a width-determining bar 12 (only the attachment portion to the leg members 11 is shown in FIGS. 1 and 2) is passed, whereby The leg member 11 is reinforced. Each first
Wheels 13 are rotatably attached to the lower ends of the leg members 11.

Referring to FIGS. 3 to 5, sliders 14 are mounted on the side bars 8 so as to be slidable along the side bars 8. The slider 14 includes a slider body 15 and the operation lever 3 described above.

The slider body 15 is a guide tube portion that surrounds the side bar 8.
16 and a bracket portion 17 extending downward from the portion 16.

Overhanging from the guide tube portion 16 to the rear, for example, "1" ~
A display plate 18 extending in the front-rear direction is provided with a sticker on which a number such as “6” is displayed. One of the numbers “1” to “6” is made visible through the window 19 provided on the side wall 6. These numbers are for displaying the current height of the child-care chair 1, and the intervals between the numbers are selected to be equal to the intervals between the engaging holes 9a to 9h described above.

Also, as shown in FIG. 3, the slider body 15 and the side wall 6 are
A tension spring 21 is connected to the side fixed portion 20.
The slider body 15 is biased by the tension spring 21 so as to slide rearward along the side rod 8.

A bracket portion 22 is provided so as to extend upward from the upper surface of the guide cylinder portion 16. In this bracket part 22,
The operation lever 3 is rotatably held with 23 as a fulcrum.

Due to manufacturing problems, the operating lever 3 is composed of two parts, an operating portion 24 and an operating portion 25, and is integrated later.
At one end of the operating lever 3, there is provided an engaging projection 26 that engages with a selected one of the engaging holes 9a to 9h. The engagement protrusion 26
In order to make it possible to reach the side rod 8,
Is provided with a through hole that allows the engagement protrusion 26 to penetrate therethrough. Two engaging protrusions 26 are provided side by side, and engage with the engaging holes 9a and 9c in the state shown in FIG. Therefore, there are six types of engagement of the engagement projections 26 with the engagement holes 9a to 9h, and therefore, the seat portion 2 of the child-care chair 1 can be adjusted in height in six stages.

The operation lever 3 is biased by a compression spring 27 so that the engagement protrusion 26 rotates in a direction in which it engages with the engagement holes 9a to 9h.

Bracket part 17 of the slider body 15 provided for the slider 14
A pair of second leg members 29 are rotatably attached to each of them via a pin 28. The second leg member 29 has a pin 30 having an intermediate portion for each intermediate portion of the first leg member 11.
Is rotatably connected via. Wheels 31 are rotatably attached to the lower ends of the respective second leg members 29.

The operating lever 3 is arranged so as to penetrate the side wall 6, as shown in FIGS. 4 and 5. The side wall 6 is provided with a through hole 32 that penetrates the operation lever 3 in this way and extends in a range that allows the rotation of the operation lever 3. As a result, most of the operating portion 24 of the operating lever 3 is in a state of being projected to the outside of the side wall 6. The operation portion 24 has a lock member for inhibiting the rotation of the operation lever 3 by filling a gap of the operation lever 3 in the through hole 32.
33 is operably mounted.

In this embodiment, the lock member 33 is attached to the lower surface of the operation portion 24 so as to be rotatable around an axis line that is oriented in the vertical direction. The lock member 33 is provided with a claw 34 (FIG. 5).
As shown in FIG. 5, when fitted into the through hole 32, the operation lever 3 is prohibited from rotating.

In this way, if the lock member 33 can prohibit the rotation of the operation lever 3, priority is given to the operability of the operation lever 3, and the size of the operation unit 24 is increased or the operation unit 24 is operated.
However, even if the degree of protrusion from the side wall 6 is increased, the operation lever 3 can be prevented from being inadvertently rotated. In this embodiment, the operation portion 24 has a shape extending long in the front-rear direction on the outer side of the side wall 6.

Below, the usage method of this child-care chair 1 is demonstrated.

First, as shown in FIG. 1, it is assumed that the child-care chair 1 is used with the seat portion 2 being raised to the highest position. In this state, as shown in FIG. 3, the engagement protrusion 26 engages with the engagement holes 9a and 9c. Further, the locking member 33 is
As shown in FIG. 5, the claw 34 is fitted in the through hole 32, whereby the operation lever 3 is in a state in which its rotation is prohibited. Further, as shown in FIG. 3, the window 19 provided on the side wall 6 displays a numeral "6" indicating that the height is the highest.

When it is desired to lower the height of the seat portion 2 from the state shown in FIG. 1, first, the lock member 33 is rotated to move the claws.
As shown in FIG. 4, 34 is brought out of the through hole 32. Then, a force for displacing the operating portion 24 of the operating lever 3 is applied to the operating portion 24, so that the engaging projection 26 is released from the engaging holes 9a and 9c, while maintaining this state. , A force is applied to displace the seat portion 2 downward. In response, slider 14
By sliding forward along the side bar 8, the angle of intersection between the first leg member 11 and the second leg member 29 is changed. If the force applied to the operation lever 3 is removed when the seat portion 2 is set to a desired height, the operation lever 3 is rotated by the action of the compression spring 27, and the engagement projection 26 is engaged with the engagement hole 9a. It will be in the state of engaging with any of ~ 9h.

For example, if the seat portion 2 were brought to the lowest position, as shown in FIG. 2, the engagement projections 26 engage the engagement holes 9f and 9h. In this state, the window 19 displays the number "1" indicating the lowest state. Then, when the use in this state is continued, the lock member 33 is rotated and the claw 34 is fitted into the through hole 32 as shown in FIG.

The operation for adjusting the seat portion 2 from the low position to the high position is substantially the same as the above-described case. In addition,
Thus, the operation for displacing the seat portion 2 from the lower position to the higher position can be performed with a lighter force by the action of the tension spring 21.

Wheels 13 and 31 provided in the embodiments described above
Not only makes it easy to move the child-care chair 1 to any place even when the infant is seated, but also makes it easy to move the child-care chair 1 back and forth, which allows the infant to sleep naturally. Can be invited to.
Further, since the wheels 13 and 31 facilitate the movement of the first leg member 11 and the second leg member 29 with respect to the floor surface, the height adjusting operation of the seat portion 2 can be facilitated. .

[Brief description of drawings]

FIG. 1 is a side view of a child-care chair 1 as an embodiment of the present invention, showing a state in which a seat portion 2 thereof is brought to the highest position. FIG. 2 is a side view also showing the child-care chair 1 shown in FIG. 1, and shows a state in which the seat portion 2 is brought to the lowest position. FIG. 3 is a partially cutaway side view showing an enlarged main part of the seat portion 2 provided in the child-care chair 1, and shows a state corresponding to the state shown in FIG. 4 and 5 are sectional views of the portion shown in FIG. 3, respectively, in which the left side of the line C is a section along the line AA in FIG. 3 and the right side of the line C is FIG. 4 is a cross section taken along line B-B in FIG. 4, in which the operation lever 3 is unlocked and FIG. 5 is the operation lever 3 locked. In the figure, 1 is a child chair, 2 is a seat portion, 3 is an operating lever, 6 is a side wall, 8 is a side bar, 9a to 9h are engaging holes, 10 is a bracket, 10a is a pin, and 11 is a first leg member. , 14 is a slider, 15 is a slider body, 17 is a bracket portion, 23 is a pin,
24 is an operating portion, 26 is an engaging protrusion, 27 is a compression spring, 28 is a pin,
29 is a second leg member, 30 is a pin, 32 is a through hole, and 33 is a lock member.

Claims (1)

[Scope of utility model registration request] 1. A pair of side walls positioned on both sides of a seat portion, a pair of side bars fixed to each side wall and extending in a horizontal direction and parallel to each other, and each side wall. A pair of first rotatably attached to the first
Leg members, a pair of sliders mounted so as to be slidable along the side bars, respectively, and rotatably mounted with respect to the sliders, and an intermediate portion of each of the first leg members. A pair of second leg members that are rotatably connected to the respective intermediate portions of each of the side rods, and a plurality of engagement holes formed in each of the side bars in the longitudinal direction thereof. In each of the sliders, a rotatable operation lever having an engaging projection that engages with a selected one of the plurality of engaging holes at one end thereof, and the engaging projection has the engaging hole. A spring for urging the operation lever to rotate in a direction in which the operation lever is rotated, the operation lever penetrates the side wall, and the side wall includes
A through hole that penetrates the operation lever and extends in a range that allows the operation lever to rotate is provided, and further, by rotating a gap of the operation lever in the through hole, the rotation of the operation lever can be selectively performed. A chair equipped with a lock member that is prohibited to.