JP2005278974A - Infant chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an infant chair that can improve the swivel performance, make a small-radius swivel, and facilitates a movement in a small room. <P>SOLUTION: The infant chair is provided with a seat supporting member 7 mounted on the upper end of legs 2 composed of front legs and back legs and an infant seat 1 that is mounted and supported on the seat supporting member. Casters 24 are provided at all the front legs 3 and the back legs 4 at the lower end parts. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a height adjustable chair used for infants such as newborns, babies or children.

Conventionally, as the above-mentioned infant chair, a reclining mechanism is provided on the infant seat so that the infant can be laid down or seated, and a leg portion that supports the infant seat is provided on the leg portion. Proposals have been made for practical use in which wheels are provided so that the interior can be freely moved and the height can be adjusted when eating. That is, as the chair for infants, the seat is supported by a pair of left and right X-shaped legs configured in an X shape by pivotally attaching the middle part of the front leg and the rear leg to each other. The seat height can be adjusted by rotating the rear legs toward or away from each other, and the direction can be easily changed during indoor movement. For this reason, a caster is provided at the front end of the front leg.
JP 2003-24189 A

  However, in the conventional infant chair, since the casters are provided only on the front legs as described above, the turning ability at the time of movement is not sufficient, the small turn is not effective, and the movement in a narrow room is not always easy. There's a problem.

  In view of such a point, an object of the present invention is to obtain an infant chair that can be turned in a small turn and can be easily moved in a narrow room.

  The invention according to claim 1 is an infant chair having a seat support member mounted on an upper end portion of a leg portion including a front leg and a rear leg, and an infant seat placed and supported on the seat support member. Casters are attached to all the lower ends of the front and rear legs.

  According to a second aspect of the present invention, in the first aspect of the invention, the height of the infant seat can be adjusted by rotating the front leg and the rear leg in directions toward or away from each other. In addition, an interlocking bar is provided in each front leg and rear leg so that the caster shaft of the caster is always kept vertical in accordance with the rotation of the front leg and rear leg.

  The invention according to claim 3 is the invention according to claim 2, wherein the front ends of the front legs and the rear legs are pivotally attached to the caster holders, and the front ends of the interlocking bars provided in the front legs and the rear legs. However, the other end of the interlocking bar is pivotally attached to a boss or a hinge coupling portion provided on the seat support member. It is connected to a lever that is swung according to the rotation of the leg.

  The invention according to claim 4 is characterized in that, in the invention according to claim 3, the tip end portion of the lever pivotally attached to the seat support member is engaged with a long hole provided in each leg. To do.

  In the present invention, as described above, casters are attached to all the lower ends of the front legs and the rear legs, so that it is possible to sufficiently improve the turning performance at the time of movement, and it is possible to move freely even in a narrow room with a small turn. it can.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a schematic configuration of an infant chair, FIG. 2 is a side view thereof, and an infant seat 1 is supported by X-shaped legs 2 formed in a pair of left and right X shapes. The X-shaped leg 2 is constructed by pivotally attaching the middle part of the front leg 3 and the rear leg 4 to each other by a pin 5. The left and right front legs 3 are connected by a front connecting rod 6 a, and the left and right rear legs 4 are connected. Are connected by a rear connecting rod 6b (FIG. 2). The upper end portion of the rear leg 4 is pivotally attached to a boss 8 provided at the front portion of the seat support member 7, and the upper end portion of the front leg 3 is moved back and forth with respect to the seat support member 7 at the rear portion of the seat support member 7. It is pivotally attached to a hinge coupling portion 9 that can be provided. And, as shown by the chain line, a cover is provided on the outer surface of the sheet support member 7 to cover the upper portion of the sheet support member 7 and the boss 8 and the hinge coupling portion 9. The infant seat 1 is placed and mounted thereon.

  As shown in FIGS. 1 and 2, the infant seat 1 is provided on a seat 10 on which an infant mainly puts a buttocks, a back 11 disposed behind the seat 10, and above the back 11. The headrest 12 and the step 13 provided in front of the seat portion 10 are configured. The back portion 11 is raised as shown in FIG. 1 and can be used as a chair, and as shown in FIG. A reclining mechanism is provided so that the bed can be used as a bed. When the back part 11 is tilted so that it can be used as a bed, the step 13 also swings upward in response to the back swing of the back part 11 so that the infant's foot is supported. Side walls 13a are provided on both sides of the step 13, so that the infant can be prevented from falling during use as a bed as described above, and the visual anxiety that it may fall may be eliminated. It is.

  FIG. 4 is a view showing the structure of the connecting portion between the front leg 3 and the rear leg 4 and the seat support member 7. The upper end of the rear leg 4 is pivotally attached to the boss 8 of the seat support member 7 by a pin 14. The upper end of the hinge is pivotally attached to the hinge joint 9 by a pin 15. A slide bar 16 is integrally provided on the hinge coupling portion 9, and the slide bar 16 is accommodated in the seat support member 7 so as to be slidable in the front-rear direction. That is, the slide bar 16 is formed with a long hole 17 extending to the hinge coupling portion 9 in the front-rear direction, that is, in the longitudinal direction. Two pins 18 projecting from the sheet support member 7 at a predetermined interval are inserted into the long holes 17, and the slide bar 16 is moved in the longitudinal direction by the engagement between the long holes 17 and the pins 18. Are slidable. The slide bar 16 is biased by a spring (not shown) in the left direction in FIG. 4, that is, in the direction in which the X-shaped leg 2 extends and becomes higher.

  The slide bar 16 has a rectangular cross section, and a plurality of adjustment holes 19 are arranged in a row in the longitudinal direction on the upper surface of the slide bar 16. On the other hand, the seat support member 7 is provided with a pin 20 that is selectively inserted into one of the adjustment holes 19 so as to be movable up and down. The pin 20 is urged in the insertion direction by a spring 21, and a lever 22 is provided to be engaged with the enlarged diameter portion of the pin 20. The lever 22 protrudes outside the seat support member 7 and can move up and down along the pin 20.

  Thus, when the lever 22 is pulled upward from the outside of the seat support member 7, the pin 20 moves upward against the biasing force of the spring 21 and is removed from the adjustment hole 19. When the pin 20 is disengaged from the adjustment hole 19, the slide bar 16 is moved to the left in the drawing by the action of a spring (not shown), thereby extending the X-shaped leg 2 hinged to intersect with the X-shape. The height of becomes higher.

  On the other hand, when the pin 20 is pulled out from the adjustment hole 19 and the seat support member 7 is pushed down in this state, the slide bar 16 moves to the right in FIG. 2 together with the hinge coupling portion 9 so that the inclination angles of the front leg 3 and the rear leg 4 are increased. When the hinge coupling portion 9 is moved to the rightmost side, the pin 20 engages with the adjustment hole 19 and the folding state is lowered. This folded state is shown in FIG.

  Incidentally, casters 24 are provided at the lower ends of all the front legs 3 and rear legs 4. Thus, the infant chair can be easily moved back and forth and right and left by the caster 24, the turning performance can be sufficiently improved, the small turn is effective, and the infant chair can be moved freely even in a narrow room.

  However, in the case where the casters 24 are provided on all of the front legs 3 and the rear legs 4 as described above, for example, as shown in FIG. In such a low position, the angle of inclination of the front leg 3 and the rear leg 4 changes, so that the caster shaft 25 is not perpendicular to the floor surface and the movement may not be smooth. is there. Therefore, in the present invention, the caster shaft 25 is always perpendicular to the floor surface regardless of whether the infant chair is in the high position or the low position.

  FIG. 6 is a cross-sectional view showing a state in which the front leg 3 is connected to the caster 24 and the hinge coupling portion 9. The lower end portion of the front leg 3 is pivotally attached to the caster holder 27 of the caster 24 by the shaft 26. The part is pivotally attached to the hinge joint 9 by a shaft 28. An interlocking bar 29 is inserted into the front leg 3, a lower end portion of the interlocking bar 29 protrudes from the opening 3 a of the front leg 3, and a tip end portion thereof is pivotally attached to the caster holder 27. That is, the lower end portion of the interlocking bar 29 is pivotally attached to the caster holder 27 by the pin 30 at a position eccentric with respect to the shaft 26 on which the front leg 3 is pivotally attached. On the other hand, the hinge coupling portion 9 is provided with a shaft 31 at a position eccentric with respect to the shaft 28 pivotally attached to the hinge coupling portion 9 at the upper end portion of the front leg 3. The upper end of the interlocking bar 29 is pivotally attached to the tip end of the lever 32 by a pin 33. The pin 33 is engaged with a long hole 34 provided in the front leg 3 and extending in the longitudinal direction.

  Accordingly, when the front leg 3 in the high position state indicated by the solid line in FIG. 6 is rotated so as to be in the low position state indicated by the chain line, the lever 32 is rotated clockwise in FIG. The interlocking bar 29 is pulled in the axial direction. Therefore, when the interlocking bar 29 is moved in the axial direction, the caster holder 27 is rotated counterclockwise about the shaft 26, and the caster shaft 25 is held in a state perpendicular to the floor surface.

  On the contrary, when the front leg 3 changes from the low position state indicated by the chain line to the high position state indicated by the solid line, the caster holder 27 is rotated clockwise through the interlocking bar 29, and the caster shaft 25 is rotated around the front leg 3. Maintains a vertical position regardless of movement.

  Although the front leg 3 has been described with reference to FIG. 6, the rear leg 4 is configured similarly except that the rear leg 4 and the lever 32 are pivotally attached to the boss 8 of the seat support member 7. Similarly, the caster shaft 25 is maintained in a vertical state regardless of the rotation of the rear leg 3.

    FIG. 7 shows a state in which the infant chair is in the high position, and FIG. 8 shows a state in the low position. As described above, the caster shaft 25 of the caster 24 in the infant chair is always kept perpendicular to the floor surface regardless of whether the X-leg is in the high position or the low position, so that the chair can be moved smoothly. It can be carried out.

The perspective view of the infant chair of the present invention. The side view of the infant chair of the present invention. The perspective view which shows the state which enabled use of the sheet | seat for infants as a bed. The figure which shows the structure of the connection part of a front leg and a rear leg, and a sheet | seat support member. The side view which shows the state which made the infant chair low position. Sectional drawing which shows the connection state with the caster of a front leg, and a hinge coupling | bond part. The figure which shows the state which has the chair for infants in a high position position. The figure which shows the state which the chair for infants exists in a low position position.

Explanation of symbols

1 Infant seat 2 X-leg 3 Front leg 4 Rear leg 7 Seat support member 8 Boss 9 Hinge joint 10 Seat 11 Back 13 Step 16 Slide bar 17 Long hole 19 Adjustment hole 20 Pin 22 Lever 24 Caster 25 Caster shaft 27 Caster Holder 29 Interlocking bar 32 Lever

Claims (4)

  In an infant chair having a seat support member mounted on an upper end portion of a leg portion including a front leg and a rear leg, and an infant seat placed and supported on the seat support member, the lower end portion of the front leg and the rear leg Is an infant chair, characterized in that all are casters.   The height of the infant seat can be adjusted by rotating the front leg and the rear leg toward or away from each other, and the front leg and the rear leg are included in each front leg and rear leg. 2. The infant chair according to claim 1, further comprising an interlocking bar that keeps the caster shaft of the caster in a vertical state in accordance with the rotation of the leg.   The front ends of the front legs and the rear legs are pivotally attached to the caster holders, and the front ends of the interlocking bars provided in the front legs and the rear legs are connected to the caster holders from the pivot shafts of the legs. It is pivotally mounted at an eccentric position, and the other end of the interlocking bar is connected to a lever that is pivotally attached to a boss or hinge coupling portion provided on the seat support member and swings according to the rotation of each leg. The infant chair according to claim 2, wherein:   The infant chair according to claim 3, wherein a distal end portion of the lever pivotally attached to the seat support member is engaged with a long hole provided in each leg.

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