JP4460873B2 - Bicycle and its infant seat - Google Patents

Description

  The present invention relates to a bicycle infant seat and a bicycle equipped with an infant seat.

  A conventional bicycle infant seat has been proposed that can be used as a luggage bag (see, for example, Patent Document 1).

  However, despite the physique differences among infants, these infant seats are forced to sit in a cramped posture because their backs are fixed.

  In view of this, a configuration has been proposed in which a sufficient seating space is ensured regardless of the physique difference by making the backrest reclineable (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 11-49058 Japanese Patent Laid-Open No. 2001-219897

  However, the infant seat described in Patent Document 2 has a narrow inclination angle range of the backrest, and it is not easy to take an optimal posture for the infant. In addition, since the infant sits in a front-facing state, the driver (for example, a mother) cannot observe the infant during driving.

  The present invention has been made in view of the above-described problems of the prior art, and it is possible to improve the comfort and to ensure the safety of the infant by adopting a configuration in which the infant can take the optimum posture. The purpose is to provide seats for use.

  Another object of the present invention is to provide a bicycle infant seat having a configuration in which the driver can observe the state of the infant even while driving.

To achieve the above object, the invention according to claim 1 of the present invention comprises a seat body that is detachably attached to a bicycle handle, and the seat body extends substantially horizontally in the left-right direction. An infant seat of a bicycle that is attached so as to be tiltable in the front-rear direction integrally with a handle central axis as a tilting axis , wherein the seat body has a seat back portion, and an upper end portion is provided at an upper back portion of the seat back portion. A pivoted seat bar is further provided, and the seat bar is attached so as to be swingable in the front-rear direction with the pivoting portion with respect to the seat back portion as a swing center .

  The invention described in claim 2 further includes a headrest for supporting the head of the infant and a footrest for supporting the leg of the infant.

According to a third aspect of the present invention, the abdomen of the infant is held at the lower end of the seat bar.

The invention according to claim 4 is characterized in that a grip bar extending substantially parallel to the lower end of the seat bar is attached in the vicinity of the lower end of the seat bar.

The invention according to claim 5 further includes a seat bar fixing tool pivotally attached to an upper end portion of the seat bar, the seat bar fixing tool is attached to a back surface of the seat back portion so as to be movable up and down, and the headrest Is attached to the seat bar.

The invention according to claim 6 is characterized in that the seat body is a reversible type capable of changing the front-rear direction.

The invention described in Claim 7 is a bicycle, characterized in that fitted with baby seat bicycle according to any one of claims 1 to 6.

  According to the present invention, since the seat body is integrally attached to be tiltable in the front-rear direction with the handle central axis extending substantially horizontally in the left-right direction as the tilting axis, the infant can be seated in an optimal posture. Comfort is improved.

  Moreover, since the headrest and the footrest are attached to the seat body, the optimum posture of the infant can always be maintained.

  Further, a seat bar having an upper end pivotally attached to the upper back portion of the seat back portion is attached so as to be swingable in the front-rear direction around the pivot portion with the seat back portion as a swing center. The safety of infants while driving is improved.

  Further, since the grip bar extending substantially parallel to the lower end portion of the seat bar is attached in the vicinity of the lower end portion of the seat bar, comfort during driving is improved by gripping the grip bar as appropriate.

  In addition, when the seat bar is attached to the seat back part so as to be movable up and down and the headrest is attached to the seat bar, the child's physique difference can be absorbed, and comfort is improved.

  In addition, since the seat body is a reversible type, the driver can set it so that the child can be observed while driving.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show an infant seat S of a bicycle (including an electric assist bicycle) according to the present invention, which is detachably attached to a handle 2 of the bicycle. The infant seat S is a retractable and reversible infant seat, and FIGS. 1 to 3 show a state in which the infant sits forward on the seat S facing the traveling direction.

  As shown in FIG. 1 to FIG. 3, the infant seat S is attached to a seat body 4 on which an infant sits and an upper portion (a seat bar described later) of the seat body 4 to support the head of the infant. Headrest 6, a footrest 8 attached to the lower part of the seat body 4 for supporting an infant's leg, and a seat bar 10 for protecting the infant.

  The upper end of the seat bar 10 is pivotally attached to the back surface of the seat back part 4a of the seat body 4 via a seat bar fixture 12, and the seat bar 10 swings the pivot part with the seat back part 4a. It is attached so that it can swing in the front-rear direction as the center. The seat bar 10 in the seated state shown in FIGS. 1 to 3 rises upward from the seat bar fixing tool 12 and extends substantially horizontally in the front-rear direction on both sides of the infant's head, and further extends substantially linearly forward and downward. At the same time, after curving toward the inside (both sides of the infant) near the infant's abdomen, the seat bars 10 on both sides are integrally connected in front of the infant's abdomen. That is, the lower end portion 10a of the seat bar 10 extends horizontally from side to side, and a protective pad 14 that is a cushion material is attached to the horizontal portion. Further, a grip bar 10b extending substantially parallel to the lower end horizontal portion 10a is provided above the lower end horizontal portion 10a, and both ends of the grip bar 10b are connected to the seat bars 10 on both sides. The grip bar 10b is for a seated infant to hold it by hand.

  The headrest 6 described above is fixed to a portion extending in the front-rear direction on both sides of the infant's head by a headrest fixture 16.

  Further, the lower end portion 10 a of the seat bar 10 and the front edge of the bottom portion (sitting portion) 4 b of the seat body 4 are configured to be connectable by a seat belt 20 having a buckle 18.

  The seat body 4, the headrest 6 and the footrest 8 are made of resin, and the seat bar 10 is made of metal.

  The infant seat S has a substantially rectangular shape when viewed from the front, and the seat mounting portion (center portion) of the bicycle handle 2 to which the lower portion of the infant seat S is attached has a substantially U-shape. The lower part of the seat S and the seat mounting part of the handle 2 have complementary shapes. The central portion of the handle 2 is a linear central axis that extends substantially horizontally in the left-right direction, and this central axis acts as a tilting axis for the infant seat S.

  A pair of left and right seat fixtures 22 are attached to the bottom surface of the bottom portion 4b of the seat body 4, and the seat body 4 is attached to the handle 2 by bolting after the seat fixtures 22 are mounted on the handle central axis described above. Attached to.

  FIG. 4 shows a tilt mechanism for tilting the sheet main body 2, and includes a tilt plate 24 attached to the outer surface of both side portions of the sheet main body 2 and a tilt base 26.

  The tilt plate 24 has two tilt knob shaft insertion holes 24a that are spaced apart at a predetermined interval. The two tilt knob shaft insertion holes 24a are the same around the handle central axis that is the tilt axis of the infant seat S. It is formed on an arc of radius R.

  On the other hand, the tilt base 26 is fixed in the vicinity of the grip portion of the bicycle handle 2 via an attachment member (not shown), and a tilt knob shaft 28 is slidably attached. A tilt knob 30 is attached to the head of the tilt knob shaft 28, and a set screw 32 for fixing the tilt knob shaft 28 is attached to the tilt knob 30. The tilt base 26 is slidable with a press-fit plunger 34 for holding the tilt knob shaft 28 by fitting with one of two annular recesses 28a formed at an intermediate portion of the tilt knob shaft 28 at a predetermined interval. The press-fit plunger 34 is always urged toward the tilt knob shaft 28.

  The mounting position of the tilt knob shaft 28 is set such that the angle from the vertical line passing through the handle central axis is, for example, α + β = 26 °, and the angle of the two tilt knob shaft insertion holes 24a with respect to the handle central axis is For example, β = 12.5 ° is set.

  5 and 6 show a case where the infant seat S is reversed from the state shown in FIGS. 1 to 3 so that the infant is seated so as to face the driver (for example, mother). FIG. 6 shows the time when the vehicle is moved backward. 5 and 6, the headrest 6, the footrest 8, the seat bar 10, and the like are not shown. Further, forward or backward as used herein means tilting forward or backward toward the driver.

  As shown in FIGS. 5 and 6, the infant seat S according to the present invention includes a pair of detachable attachment arms 36, and the attachment arm 36 has a base end portion of the seat body 4 as necessary. For example, bolts (not shown) or the like are attached to the both sides of each. When the attachment arm 36 is attached to the seat body 4, the attachment arm 36 is disposed on a circular arc with a radius R centered on the handle central axis, and two tilt knob shafts spaced at a predetermined interval are disposed at the tip portion thereof. An insertion hole 36a is formed. The angle of the two tilt knob shaft insertion holes 36a with respect to the handle central axis is set to, for example, β = 12.5 °, similarly to the two tilt knob shaft insertion holes 24a formed in the tilt plate 24.

  In the figure, reference numeral 38 denotes a handle cover.

  3 shows the protective pad 14 attached to the lower horizontal portion 10a of the seat bar 10, the protective pad is also attached to the seat bar 10 extending on both sides of the seated infant. In addition, the cushion material is also attached to the contact portion of the seat body 4 and the headrest 6 except the footrest 8 with the infant.

The operation of the infant seat S having the above configuration according to the present invention will be described below.
When the infant is to be seated in the direction of travel of the bicycle, as shown in FIGS. 1 to 3, the seat main body 4 is mounted by attaching a pair of left and right seat fixtures 22 to the handle central axis and tightening them with bolts. Is first attached to the handle 2, and the seat body 4 is fixed by inserting the tilt knob shaft 28 into one of the two tilt knob shaft insertion holes 24a formed in the tilt plate 24. At this time, the tilt knob shaft 28 is engaged with one of the two annular recesses 28a of the tilt knob shaft 28 (the annular recess 28a when locked) by the press-fit plunger 34 slidably attached to the tilt base 26. The seat body 4 is held in that position and locked.

  Next, after the seat bar 10 is lifted and the infant is seated, the seat bar 10 is swung forward, and the seat belt 20 attached to the lower end portion of the seat bar 10 and the seat belt 20 attached to the bottom portion 4b of the seat body 4. Are connected by the buckle 18, the operation for sitting the infant is completed.

  When the infant is desired to be lowered from the infant seat S after driving the bicycle, the buckle 18 is removed, and then the seat bar 10 is lifted and swung backward.

  Furthermore, when it is desired to change the tilt angle of the seat body 4, when the tilt knob 30 is pulled outward, the press-fit plunger 34 is detached from the annular recess 28 a when the tilt knob shaft 28 is locked. When the tilt knob 30 is pulled further outward, the tilt knob shaft 28 is disengaged from the tilt knob shaft insertion hole 24a of the tilt plate 24, and the press-fit plunger 34 is engaged with another annular recess 28a (annular recess 28a when unlocked). When the hand is released, the tilt knob shaft 28 is held in that position.

  Thereafter, when the seat body 4 is integrally tilted to a predetermined position in the front-rear direction with the handle central axis as the tilt axis and the tilt knob 30 is pushed in, the tilt knob shaft 28 is inserted again into another tilt knob shaft insertion hole 24a. The press-fit plunger 34 is re-engaged with the annular recess 28a when locked, and the seat body 4 is locked.

  In order to reverse the direction of the infant seat S, after loosening the bolts of the seat fixture 22 and removing the seat body 4 from the handle 2, the base ends of the mounting arms 36 are attached to both sides of the seat body 4. Then, the seat body 4 is fixed to the handle 2 by the seat fixture 22. Thereafter, in the state shown in FIGS. 5 and 6, the seat body 4 is fixed by inserting the tilt knob shaft 28 into one of the two tilt knob shaft insertion holes 36 a formed at the tip of the mounting arm 36. Thus, the seat body 4 is locked.

  Since the operation of the tilt knob 30 or the operation for changing the tilt angle of the sheet body 4 at this time is the same as that in the state shown in FIGS. 1 to 3, the description thereof is omitted.

  In the above-described embodiment, the seat bar fixture 12 to which the upper end portion of the seat bar 10 is pivotally attached can be attached to the back surface of the seat back portion 4a of the seat body 4 so as to be movable up and down. In this case, the seat bar 10 and the headrest 6 attached to the seat bar 10 can be moved up and down, and it is possible to cope with a difference in the physique of an infant.

  In the above-described embodiment, the two tilt knob shaft insertion holes 24a and 36a are formed in the tilt plate 24 or the mounting arm 36, but three or more tilt knob shaft insertion holes are formed to further increase the inclination angle of the seat body 4. It can also be changed finely.

  Further, in the above embodiment, the tilt mechanism shaft 28 and the press-fit plunger 34 are provided in the tilt mechanism and the seat body 4 is locked or unlocked. However, the holding means is not limited to this, and the seat body is not limited thereto. Other configurations may be adopted as long as the main body 4 can be locked or unlocked.

  The present invention is not limited to the above-described embodiment, and various modifications other than the above-described configuration can be made without departing from the spirit of the present invention.

  In the infant seat of the bicycle according to the present invention, the reversible seat body is integrally attached to the bicycle handle so as to be tiltable in the front-rear direction, so that the comfort of the infant seated on the seat is improved and necessary. Accordingly, since the driver can observe the state of the infant even while driving, it is useful as a bicycle or the like used for shopping by a mother with an infant.

It is a perspective view of the infant seat of the bicycle concerning the present invention. (A) is a front view of the infant seat shown in FIG. 1, (b) is a side view thereof. (A) is a front view of the infant seat shown in FIG. 1, (b) is a side view thereof. The tilt mechanism for tilting a sheet | seat main body is shown, (a) is the front view, (b) is the XX sectional drawing. The state which reversed the infant seat shown in FIG. 1 is shown, (a) is the side view, (b) is the perspective view. The state which tilted the infant seat shown in FIG. 5 is shown, (a) is the side view, (b) is the perspective view.

Explanation of symbols

2 Handle, 4 Seat body, 4a Seat back part, 4b Seat surface,
6 headrest, 8 footrest, 10 seat bar, 10a bottom horizontal part,
10b Grip bar, 12 Seat bar fixture, 14 Protective pad,
16 headrest fixture, 18 buckle, 20 seat belt,
22 sheet fixture, 24 tilt plate, 24a tilt knob shaft insertion hole,
26 tilt base, 28 tilt knob shaft, 28a annular recess,
30 tilt knob, 32 set screw, 34 press-fit plunger,
36 mounting arm, 36a tilt knob shaft insertion hole, 38 handle cover,
S Infant seat.

Claims (7)

A toddler of a bicycle having a seat body that is detachably attached to a handle of the bicycle, and the seat body is integrally tiltably attached in the front-rear direction with a handle central axis extending substantially horizontally in the left-right direction as a tilt axis. For seats,
The seat body further includes a seat bar having a seat back portion, and an upper end portion pivotally attached to an upper back portion of the seat back portion, and the seat bar is pivoted about a pivot portion with the seat back portion An infant seat for bicycles that is swingably mounted in the front-rear direction . The bicycle seat according to claim 1, further comprising a headrest for supporting the infant's head and a footrest for supporting the leg of the infant. 3. The infant seat for bicycles according to claim 1 or 2 , wherein an abdomen of the infant is held at a lower end portion of the seat bar. The bicycle seat according to claim 3 , wherein a grip bar extending substantially parallel to a lower end portion of the seat bar is attached in the vicinity of the lower end portion of the seat bar. It further comprises a seat bar fixing tool pivotally attached to the upper end of the seat bar, the seat bar fixing tool is attached to the back of the seat back part so as to be movable up and down, and the headrest is attached to the seat bar. The infant seat for bicycles according to claim 2 . The bicycle seat according to any one of claims 1 to 5 , wherein the seat body is a reversible type that can change a front-rear direction. A bicycle comprising the infant seat of the bicycle according to any one of claims 1 to 6 .

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