JPH092284A - Stroller - Google Patents

Abstract

PURPOSE: To provide stable suspension on a step difference of a bumpy road and on a slope with simple constitution so as to ensure stable traveling performance of a stroller. CONSTITUTION: An arm suspension device F for absorbing and relaxing vibration and impact to the opened side of an arm frame body 10 is formed of an arm supporting part 9 for pivotally supporting a front arm 5 and a rear arm 8 in a ring fitted state so as to be rotatable to each other, and the arm frame body 10 formed of a lateral pair of first links 18 that link handle parts 17 with front arms, and a lateral pair of second links 20 that link the handle parts 17 with rear arms 8. An axle type suspension device G is formed of a suspension member 12 for rotatably supporting the lateral sides of an axle 11, a caster fulcrum member 4 for supporting the suspension member 12 in the vertically oscillating state and locking in a depression angle moved position of the suspension member 12, and a rubber bush 13 interposed between the caster fulcrum member 4 and the suspension member 12 so as to absorb and relax vibration and impact at the time of acting in the direction of a elevation angle of the suspension member 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable stroller for carrying a baby when going out for shopping, walking, traveling, etc.

[0002]

2. Description of the Related Art Conventionally, there has been a caster for supporting a small wheel, in which a spring or the like is directly wound, and the small wheel is protected and supported only by the cushioning function of the spring.

[0003]

[Problems to be Solved by the Invention] However, when going out for shopping, walking, traveling, etc. with a baby, it often goes through winding roads, bumpy roads, hills, etc. There are places with large and small steps. In such a case, the conventional wheel cannot sufficiently perform the function of getting over the obstacle, the operability is reduced, and there is a problem that the danger cannot be avoided by the smooth operation in an emergency. there were. Therefore, stable running performance of the stroller and stable suspension on uneven roads and steps have been desired.

Therefore, the present invention has been made in view of the above existing circumstances, and provides a stable running performance of a stroller and a stable suspension on uneven roads and steps (also on slopes). An object of the present invention is to provide a stroller which is secured and which has an improved operability and can perform a function of getting over an obstacle sufficiently as compared with a conventional wheel.

[0005]

In order to achieve the above-mentioned object, in the present invention, the rear ends of a front arm having a wheel supported at its tip and a rear arm having a wheel supported at its tip are ring-shaped. An arm support part rotatably rotatably fitted to each other in a fitting shape, and both rear end parts of the chassis are sandwiched between the upper ends of a pair of left and right handle parts, and rotatably rotatably connected via a support shaft. A pair of left and right first links that respectively connect the lower end of the chassis and a portion of the front arm that is separated from the arm support part, and the front surface of the lower surface of the chassis is detachably fitted to the connection part of the first link and the front arm. The arm frame is composed of a pair of left and right second links that connect the central portion of the handle part and a portion of the rear arm that is separated from the arm support portion to the arm support portion. Characterized in that that constituted the arm suspension system for absorbing alleviate vibrations and shocks to the expansion side of the arm frame.

Further, a suspension member that rotatably supports left and right wheels of an axle, a suspension member that supports the suspension member so as to be swingable in an elevation angle and an elevation angle direction, and an upper portion of the suspension member is a depression angle moving position of a support portion of the wheel. The caster fulcrum member to be locked by the wheel and the caster fulcrum member is interposed between the caster fulcrum member and the suspension member, and the bearing part of the wheel acts on the caster fulcrum member in the elevation direction with respect to the vibration or impact. It is characterized by comprising an axle type suspension device having a rubber bush for absorbing and relaxing the.

The rear leg of the caster fulcrum member is brought into contact with the upper edge of the rear side of the rubber bush, and a through hole for crushing pressure escape of the rubber bush is formed on the rear side surface of the rubber bush corresponding to the contact position. Alternatively, the arm suspension device and the axle suspension device may be used in combination.

[0008]

In the stroller according to the present invention, the front arm, the rear arm, the arm supporting portion, the first link, the second link, and the arm supporting portion of the arm frame body having the chassis, which constitute the arm suspension device, are provided via the arm supporting portion. Due to the expanding action, the handle parts having the first link, the second link, and the chassis act to prevent the expanding. In addition, the function to prevent the expansion is strong and has a long stroke, so it is possible to absorb and mitigate large swells while running, the stable running performance of the stroller, the function of overcoming obstacles on uneven roads and steps. Can be fully fulfilled. The rubber bush constituting the axle type suspension device absorbs and alleviates vibrations and impacts of the suspension portion of the wheel acting in the elevation direction with respect to the suspension portion of the suspension member to the caster fulcrum member. In addition, the axle suspension system is flexible and has a short stroke, so it can absorb and mitigate small irregularities during running, and fully perform the stable running performance of the stroller and the function of overcoming obstacles on uneven roads and steps. be able to.

Further, by using the arm suspension device and the axle suspension device together, a synergistic effect on the swing operation by both devices can be obtained, and it can be used on all road surfaces such as sidewalks, parks, department stores, supermarkets, etc., and it is safe and smooth. Driving can be realized.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 shown in the drawings is for carrying a baby on the road when going out for shopping, walking, traveling, etc. Is a stroller main body of approximately L800 mm × W490 mm × H920 mm size which is made of synthetic resin such as plastic or made of light metal, and each stroller main body 1 includes a front arm 5 as shown in FIG. The front pipe 2, caster holder 3 and caster holder 3 at the tip 3
A caster fulcrum member 4 rotatably supported by 60 degrees, and a flexible and short-stroke axle suspension device G rotatably supported on the caster fulcrum member 4 for absorbing and absorbing vibrations and shocks. A front wheel 3A having a diameter of about 150 mm is pivotally supported via.

Further, as shown in FIG. 4, the rear ends of the front arm 5 and the rear arm 8 on which a rear wheel 6B having a diameter of about 150 mm is supported via a rear pipe 6 and a rear wheel support portion 7 at the front end, respectively. A pair of left and right arm frames 10 are formed by an arm support portion 9 provided with a rigid and long-stroke arm suspension device F for absorbing and absorbing vibrations and impacts that are pivotally attached to each other in a ring-fitting manner. There is.

In the axle type suspension unit G, as shown in FIGS. 3 and 4, the coaxial center portions of the two front wheels 3A, which are stacked on the left and right ends of the axle 11, have an L-shaped section and a substantially box-like appearance. Bearing 12A at one end of the suspension member 12 of
Rotatably supported on the caster fulcrum member 4 so that the substantially central portion 12B of the suspension member 12 is supported on the lower part of the caster fulcrum member 4 so as to be swingable in the elevation and depression directions. The upright upper edge portion 12C of 12 is locked at the depression angle moving position of the support portion of the front wheel 3A. Further, the caster fulcrum member 4 of the suspension member 12 is provided between the caster fulcrum member 4 and the inside of the box of the suspension member 12.
The support portion of the front wheel 3A with respect to the support portion of the caster fulcrum member 4 of the caster fulcrum member 4 interposes a rubber bush 13 of a substantially D-shape as an elastic member that absorbs and absorbs vibrations and impacts that act so as to move in the elevation direction. The rear leg portion 4B is brought into contact with the step portion 13B formed at the rear upper edge portion of the rubber bush 13. Upper side 13A of the central portion of the rubber bush 13
The support portion of the caster fulcrum member 4 and the suspension member 12 penetrates through the rear side surface of the rubber bush 13 corresponding to the contact position of the rear leg 4B of the caster fulcrum member 4, and the crush relief of the rubber bush 13 is released. Oval through hole 1 for
3C is drilled. The rear wheel 3B side is also provided with an axle type suspension device G similarly to the front wheel 3A, and the configuration thereof is substantially the same, and therefore the description thereof is omitted.

As shown in FIGS. 2 and 4, the stroller body 1
Has a seat surface 14 and a backrest 15 which are integrally formed in a form based on an ergonomics of a composite material using a foamed material and use antibacterial and deodorant fibers. The seatback 14 is interlocked with the tilting and returning operation of the backrest 15. And a chassis 16 on which the seat surface 14 having a reclining mechanism is mounted so that the surface 14 can slide forward and backward. The rear end portions on both sides of the chassis 16 are sandwiched between the upper ends of a pair of left and right handle parts 17 and rotatably pivoted via a support shaft 18, and the lower end of the handle parts 17 and an arm support part on the front arm 5. 9 are connected to each other via a pair of left and right first links 18, and the chassis 16 is connected to a shaft portion 19 connected to the first link 18 and the front arm 5.
A groove portion 16A provided on the lower front side of the rear arm 8 is configured to be engageably locked so as to be engageable with and disengageable, 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 paired into a left and right pair. The two links 20 are connected to each other. In this way, with the arm frame 10 open and the shaft portion 19 linked to the first link 18 and the front arm 5 fitted and locked in the groove portion 16A on the lower front surface of the chassis 16, the arm support portion 9 is It functions as a solid and long-stroke swing arm type arm suspension device F for absorbing and absorbing vibrations and impacts in the expanding direction of the arm frame 10.

Although not shown, the front arm 5 and the rear arm 8 are attached to the arm support portion 9 of the arm suspension device F.
A rotation urging means such as a cushion member may be interposed between and. In addition, in the present embodiment, the axle type suspension device G and the arm suspension device F are used together for the stroller body 1, but such a configuration does not limit the present invention, and the axle type suspension device is used. It goes without saying that either G or the arm suspension device F may be independently configured for the stroller body 1.

[0015]

As described above, according to the present invention, the strong and long-stroke arm suspension device can absorb and mitigate a large swell while traveling, and the stroller has stable running performance, uneven road and step. The function of overcoming obstacles can be fully achieved, and the operability is further improved.

Further, the flexible and short stroke axle type suspension device can absorb and alleviate small irregularities during traveling, and the stroller has a stable traveling property and a sufficient function of overcoming obstacles on uneven roads and steps. This can be achieved and the operability is also improved.

By using the axle type suspension device G and the arm suspension device F together, a synergistic effect on the swing operation by both devices can be obtained, and a sidewalk, a park, a department store,
It can be used on all types of roads such as supermarkets and can be driven safely and smoothly.

[Brief description of 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 of the same.

FIG. 3 is an enlarged cross-sectional view showing a partial cross section of a wheel portion of the same.

FIG. 4 is a front view showing a partial cross section of the stroller body.

[Explanation 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 8 ... Rear arm 9 ... Arm support 10 ... Arm frame 11 ... Axle 12 ... Suspension member 13 ... Rubber bush 14 ... Seating surface 15 ... Backrest 16 ... Chassis 17 ... Handle parts 18 ... First link 19 ... Shaft part 20 ... Second link G ... Axle type suspension device F ... Arm suspension apparatus

Claims (4)

[Claims] 1. A front arm having a wheel supported at its tip and a rear arm having a wheel supported at its tip have arm supports rotatably pivotably attached to each other at their rear ends in a ring-fitting manner. The rear end portions on both sides are sandwiched between the upper ends of a pair of left and right handle parts, and are rotatably pivoted via a support shaft, and the lower end of the handle parts and a position separated from the arm support part on the front arm are connected to each other. A place where the front side of the lower surface of the chassis is detachably engaged with a pair of left and right first links and a connecting portion between the first link and the front arm, and is separated from the center portion of the handle part and the arm support portion on the rear arm. And an arm frame body composed of a pair of left and right second links which are respectively connected to each other, for absorbing and mitigating vibrations and impacts of the arm frame body on the expanding side of the arm frame body. A stroller characterized by comprising a suspension system. 2. A suspension member in which left and right wheels of an axle are rotatably supported, and the suspension member is swingably supported in an elevation and depression angle direction, and an upper portion of the suspension member is moved to a depression angle position of a bearing portion of the wheel. The caster fulcrum member to be locked by the wheel and the caster fulcrum member is interposed between the caster fulcrum member and the suspension member, and the bearing part of the wheel acts on the caster fulcrum member in the elevation direction with respect to the vibration or impact. A stroller comprising an axle type suspension device having a rubber bush that absorbs and relaxes. 3. The rear leg of the caster fulcrum member is brought into contact with the rear upper edge of the rubber bush, and a through hole for crushing pressure escape of the rubber bush is provided on the rear side surface of the rubber bush corresponding to the contact position. The stroller according to claim 2, wherein the stroller is provided. 4. A front arm having a front end supporting a wheel, and a rear arm having a front end supporting a wheel, each rear end of which is pivotally attached to each other in a ring-fitting manner, and an arm support portion of the chassis. The rear end portions on both sides are sandwiched between the upper ends of a pair of left and right handle parts, and are rotatably pivoted via a support shaft, and the lower end of the handle parts and a position separated from the arm support part on the front arm are connected to each other. A place where the front side of the lower surface of the chassis is detachably engaged with a pair of left and right first links and a connecting portion between the first link and the front arm, and is separated from the center portion of the handle part and the arm support portion on the rear arm. And an arm frame body composed of a pair of left and right second links which are respectively connected to each other, for absorbing and mitigating vibrations and impacts of the arm frame body on the expanding side of the arm frame body. And a suspension member that rotatably supports the left and right wheels of the axle,
A caster fulcrum member for supporting the suspension member swingably in the elevation / depression direction and for locking the upper part of the suspension member at the depression angle moving position of the support portion of the wheel, and interposed between the caster fulcrum member and the suspension member. And an axle type suspension device having a rubber bush for absorbing and mitigating vibrations and impacts of the wheel supporting portion acting in the elevation direction with respect to the supporting portion of the suspension member to the caster fulcrum member. stroller.