JP3755091B2 - stroller - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a foldable baby stroller for carrying a baby and traveling when going out for shopping, walking, traveling, or the like.
[0002]
[Prior art]
Conventionally, there is a type in which a spring or the like is directly wound around a caster that supports a small wheel, and the small wheel is protected and supported only by a buffering function by the spring.
[0003]
[Problems to be solved by the invention]
However, when going out with a baby for shopping, taking a walk, traveling, etc., it often passes through winding roads, bumpy roads, slopes, etc., and there are large and small steps on the road and in the store. There is a place. In such a case, according to the conventional wheel, the function of overcoming obstacles cannot be sufficiently achieved, the operability is reduced, and in the case of emergency, it is difficult to avoid danger with smooth operation. there were. For this reason, a stable traveling property of a stroller and a stable suspension on a bumpy road or a step are desired.
[0004]
Therefore, the present invention was created in view of the existing circumstances as described above, and ensures stable running performance of a stroller, a stable suspension on a bumpy road or a step (same on a slope), Another object of the present invention is to provide a stroller with improved operability that can sufficiently perform the function of overcoming obstacles as compared with conventional wheels.
[0005]
[Means for Solving the Problems]
In order to achieve the above-described object, in the present invention, a suspension member that rotatably supports the left and right wheels of the axle, and the suspension member that is supported so as to be swingable in an elevation angle depression direction. A caster fulcrum member that locks the upper part at the depression position of the wheel support part, and a caster fulcrum member that is interposed between the caster fulcrum member and the suspension member. And a rubber bush that absorbs and reduces vibrations and shocks acting in the elevation direction, and the rear leg portion of the caster fulcrum member is brought into contact with the rear upper edge portion of the rubber bush, and the caster fulcrum A substantially elliptical through hole for crushed relief of the rubber bush is formed in the rear side surface of the rubber bush corresponding to the rear leg portion contact position of the member .
[0006]
[Action]
In the stroller according to the present invention, the rubber bush constituting the axle suspension device absorbs and reduces vibrations and shocks that the wheel support portion acts in the elevation angle direction with respect to the support portion of the suspension member on the caster fulcrum member. In addition, the axle suspension system is flexible and has a short stroke, so it can absorb and relieve small irregularities while driving, and it can function stably for strollers and to get over obstacles on bumpy roads and steps. be able to.
[0007]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 shown in the drawings is foldable for carrying a baby and traveling when going out for shopping, walking, traveling, etc., for example. All the structural members are stroller bodies of approximately L800 mm × W490 mm × H920 mm size made of synthetic resin such as plastic or light metal. The stroller body 1 has a front pipe 2 at the front end of a front arm 5 as shown in FIG. And the caster holder 3, the caster fulcrum member 4 supported by the caster holder 3 so as to be rotatable 360 degrees, and the flexibility for absorbing and mitigating vibrations and impacts supported so as to be swingable up and down with respect to the caster fulcrum member 4. A front wheel 3A having a diameter of about 150 mm is pivotally supported through a short stroke axle suspension G. Yes.
[0008]
Further, as shown in FIG. 4, the rear ends of the front arm 5 and the rear arm 8 on which the rear wheel 3B having a diameter of about 150 mm is supported at the front end via the rear pipe 6 and the rear wheel support portion 7 are ring-fitted. A pair of left and right arm frame bodies 10 is formed by an arm support portion 9 provided with a solid and long-stroke arm suspension device F for absorbing and mitigating vibrations and impacts pivotally attached to each other.
[0009]
In the axle type suspension apparatus G, as shown in FIGS. 3 and 4, the left and right ends of the axle 11 have two coaxially centered front wheels 3 </ b> A, and L-shaped cross-sections. 12 is rotatably supported by a bearing 12A at one end of the suspension member 12, and a substantially central portion of the side surface of the suspension member 12 is supported on the lower portion of the caster fulcrum member 4 so as to be swingable in an elevation angle depression direction, and the front side of the caster fulcrum member 4 The standing upper edge portion 12C of the suspension member 12 is locked to the flange portion 4A at the depression angle moving position of the support portion of the front wheel 3A. Further, between the caster fulcrum member 4 and the inside of the box of the suspension member 12, the vibration that acts so that the support portion of the front wheel 3 </ b> A moves in the elevation direction relative to the support portion of the suspension member 12 to the caster fulcrum member 4. Further, a rubber bush 13 having a substantially D shape as an elastic member for absorbing and relaxing shocks is interposed, and the rear leg portion 4B of the caster fulcrum member 4 is brought into contact with a step portion 13B formed on the upper rear edge portion of the rubber bush 13. It is allowed. The support portion 12B of the suspension member 12 passes through the upper center portion 13A of the rubber bush 13 and the caster fulcrum member 4, and is formed on the rear side surface of the rubber bush 13 corresponding to the contact position of the rear leg portion 4B of the caster fulcrum member 4. Is formed with a substantially elliptical through hole 13 </ b> C for evacuating the rubber bush 13. The rear wheel 3B side is also provided with an axle suspension G as in the case of the front wheel 3A.
[0010]
As shown in FIGS. 2 and 4, the baby stroller body 1 has a seat surface 14 and a backrest 15 which are integrally formed in a form based on ergonomics of a composite material using a foam material and which uses antibacterial and deodorant fibers, And a chassis 16 on which the seat surface 14 having a reclining mechanism is mounted so that the seat surface 14 can slide forward and backward in conjunction with the tilting return operation of the backrest 15. The rear end portions on both sides of the chassis 16 are sandwiched between the upper ends of the pair of left and right handle parts 17 and pivotally supported via a support shaft, and the lower end of the handle part 17 and the arm support portion 9 on the front arm 5 are supported. And a groove portion provided in front of the lower surface of the chassis 16 in a shaft portion 19 where the first link 18 and the front arm 5 are connected to each other. 16A is configured so that it can be engaged and disengaged, and a central portion of the handle part 17 and a portion separated from the arm support portion 9 on the rear arm 8 are respectively connected via a pair of left and right second links 20. They are connected. As described above, the arm support portion 9 is in the state in which the shaft portion 19 connected to the first link 18 and the front arm 5 is fitted and locked in the groove portion 16A in front of the lower surface of the chassis 16 in the open state of the arm frame body. It functions as a solid and long stroke swing arm type arm suspension F for absorbing and mitigating vibrations and shocks in the expanding direction of the frame.
[0011]
In addition, although not shown in the drawings, a rotation biasing means such as a cushion member between the front arm 5 and the rear arm 8 may be wound around the arm support portion 9 of the arm suspension device F. In this embodiment, the axle suspension device G and the arm suspension device F are used in combination with the stroller body 1, but such a configuration does not limit the present invention, and the axle suspension device. Of course, either G or the arm suspension device F may be configured independently of the stroller body 1.
[0012]
【The invention's effect】
The present invention is configured as described above, and can absorb and relieve small unevenness during traveling by a flexible and short-stroke axle suspension device, stable driving performance of strollers, obstacles on uneven roads and steps The function of getting over can be performed sufficiently and the operability is improved.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a stroller body showing an embodiment of the present invention.
FIG. 2 is a plan view showing a partial cross section.
FIG. 3 is an enlarged cross-sectional view showing a partial cross section of the wheel portion.
FIG. 4 is a front view showing a partial cross section of the stroller body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Stroller body 2 ... Front pipe 3A ... Front wheel 3B ... Rear wheel 3 ... Caster holder 4 ... Caster fulcrum member 5 ... Front arm 6 ... Rear pipe 7 ... Rear wheel support part 8 ... Rear arm 9 ... Arm support part 11 ... Axle 12 ... Suspension member 12A ... Bearing 12B ... Bearing 13 ... Rubber bush 14 ... Seat 15 ... Back 16 ... Chassis 17 ... Handle part 18 ... First link 19 ... Shaft 20 ... Second link G ... Axle suspension F ... Arm suspension

Claims (1)

A suspension member that rotatably supports the left and right wheels of the axle, and a caster that supports the suspension member so that the suspension member can swing in the elevation angle depression direction and locks the upper portion of the suspension member at the depression movement position of the wheel bearing portion. A rubber that is interposed between the fulcrum member and the caster fulcrum member and the suspension member, and absorbs and reduces vibrations and shocks that the wheel support portion acts on the caster fulcrum member of the suspension member in the elevation angle direction. A rear part of a rubber bush having an axle type suspension device having a bush, the rear leg part of a caster fulcrum member being brought into contact with the rear upper edge part of the rubber bush and corresponding to the rear leg part contact position of the caster fulcrum member A stroller characterized in that a substantially elliptical through hole for crushed relief of the rubber bush is formed on a side surface.

Images