JPH0717683U - Stroller folding mechanism - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] When the body of the stroller is folded in the front-back direction, it is folded in the width direction at the same time. [Structure] Between the opposing front leg rods 1 and the opposing rear leg rods 2, connecting rods 4a and 4b configured to be folded in three are respectively passed, and passive gears 4g are provided on the cylindrical portions at both ends of the connecting rods. The drive gear 1g fixed and rotatably attached to the side surface of the leg rod meshed with the passive gear attached to the connecting rod, and the passive gear attached to the front leg rod was passed between the front leg rod and the folding operation bracket 9. The drive gear connected to the link and attached to the rear leg rod is constructed by interposing the link between the drive gear and the folding operation bracket.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a folding mechanism for a stroller, and more particularly to a folding mechanism for a stroller in which the body of the stroller is compactly folded in the front-rear direction and the width direction in association with the operation of an opening / closing operation mechanism provided on a push rod. It is a thing.

[0002]

[Prior art]

 Perform the first folding operation by moving the stroller body closer in the front-rear direction, and then fold the connecting rods between the pair of opposing leg rods in the width direction to make the entire stroller into a U-shape. Strollers configured to fold are known in the art.

[0003]

[Problems to be solved by the device]

 However, the stroller of the conventional structure has a structure for allowing the body of the stroller to approach in the front-rear direction, and a structure for folding several connecting rods and hand-pushing rods that are inserted between two opposing leg rods in the width direction. Since the structures were configured separately and there was no linkage to the movement of the two, it was not possible to automatically fold the connecting rod in the width direction in conjunction with the folding of the body in the front-back direction.

For this reason, when folding a stroller having a conventional structure, first the first folding operation is performed in which the skeleton body is brought close to the front and rear direction to fold it, and then, a plurality of connecting rods that are passed between the opposite leg rods are connected. It was necessary to perform a second folding operation that folds the push rod in the width direction, and there was the disadvantage that the two operations were not linked and the folding operation was complicated as a whole.

[0005]

[The purpose of the device]

 The present invention is intended to cope with the above situation, and when the lock of the opening / closing operation mechanism provided on the hand push rod is released and the body is approached in the front-rear direction, it is attached to the leg rod in association with this movement. The drive gears rotate the drive gears attached to the base ends of the several connecting rods that are inserted between the opposing rods, and the several connecting rods automatically fold in the width direction. The present invention provides a folding mechanism of a stroller configured to perform the above.

[0006]

[Key points of the device]

 According to the present invention, a pair of front leg rods, a pair of rear leg rods and a pair of armrest rods, and a hand that is erected from an intermediate portion of several connecting rods and rear leg rods that connect a pair of front and rear leg rods in the width direction. In a stroller configured to be foldable by a push rod, a connecting rod for connecting a front leg rod in a width direction and a connecting rod for connecting a rear leg rod in a width direction are both foldable and connectable rods. The rotatably mounted cylindrical parts formed at both ends of the front leg rod or the rear leg rod, and the passive gears composed of bevel gears are integrally attached to the upper part of the cylindrical part, and the front leg rods corresponding to the passive gears are attached. Also, a drive gear is rotatably attached to the side surface of the rear leg rod, and the base end of a crank arm of an appropriate length is fixed to the back surface of the drive gear rotatably attached to the front leg rod and the rear leg rod. Of the crank arm attached to the front leg rod A drive link is placed between the end and the middle of the folding link, and the drive link is placed between the upper end of the crank arm attached to the rear leg rod and the lower end of the folding bracket. The folding mechanism of the stroller is the main point of the device.

[0007]

【Example】

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

A stroller generally indicated by A includes a pair of front leg rods 1 and 1 facing each other, a pair of rear leg rods 2 and 2, a pair of armrest rods 3 and 3, and a pair of front and rear leg rods respectively in a width direction. The connecting rods 4a, 4b, 4c that are connected to each other and the hand pushing rod 5 that is erected from the intermediate portion of the rear leg rods 2, 2 are foldable.

The hand-pushing rod 5 has a gripping rod 51 formed by bending both ends into an L-shape so that the front surface has a substantially U-shape, and a locking mechanism 6, 6 for maintaining the folding from both ends of the gripping rod 51. The two straight rods 52, 52 linearly extending through the first and second straight rods 52 and 52 form a U-shape or an inverted U-shape as a whole.

Since the structure of the lock mechanism 6 for maintaining the folding is not an important constituent part of the present invention, a detailed description thereof will be omitted.

When the operation knob 71 is pushed in, the opening / closing operation portion 7 attached to the grip rod 51 rotates a disc-shaped drive plate 73 in which the tip of the opening / closing operation portion 7 locks the end portion of the operation wire 72 on the circumference, The operation wire 72 is pulled up (elevated) by the rotation of the drive plate 73.

Reference numeral 8 is a lower end portion of the hand-pushing rod 5, more specifically, a lock body for opening / closing operation which is attached to a position slightly higher than a pivotally connecting portion with the folding operation bracket 9, and has an L-shaped lower end surface. The stroller 81 is notched at the end, and when the stroller is assembled, the staggered portion 81 is fitted to the L-shaped fitting portion 91 formed at the tip of the folding bracket 9. Keep it up.

The opening / closing operation lock body 8 is moved up and down by an operation wire 72 that is moved up and down by the operation of the opening / closing operation section 7 provided on the hand push rod 5, and is attached to the tip of the operation wire 72 and is pushed by hand. It is connected to a drive shaft (not shown) protruding from the side surface of a lifting body (not shown) that moves up and down inside the rod 5. Since a structure in which a lock body 8 for opening / closing operation, an elevating body for raising and lowering the rock body 8 and a drive shaft connecting the both is combined is well known, detailed description thereof will be omitted.

The connecting rod 4a that connects the pair of front leg rods 1 and 1 in the width direction and the connecting rod 4b that connects the pair of rear leg rods 2 and 2 in the width direction are at positions that divide the length into three equal parts. It is rotatably attached by a shaft, and cylindrical portions 41a, 41a and 41b, 41b formed at both ends are rotatably attached to the outer circumferences of the front leg rods 1, 1 and the rear leg rods 2, 2.

The other connecting rod 4c has both ends fixed to the central portion of the folding link 82 that is inserted and extended between the front leg rod 1 and the folding operation bracket 9, and the middle portion is divided into several pieces. A shaft rod is rotatably attached via a pivot.

The cylindrical portions 41a, 41a formed at both ends of the connecting rod 4a and the upper portions of the cylindrical portions 41b, 41b formed at both ends of the connecting rod 4b have a size substantially equal to the outer diameter of the cylindrical body. The receiving gears 4g, 4g are integrally formed, and are meshed with the driving gears 1g, 1g rotatably attached to the front leg rod 1 and the rear leg rod 2 rotatably along the axial direction.

The passive gear 4g and the drive gear 1g are configured as bevel gears in which a slanted tooth surface is cut in the peripheral edge of a disk-shaped body, and the drive gear 1g is the front leg rod 1 or the rear leg rod 2. The passive gear 4g is configured to rotate normally or reversely within a range of about 90 degrees in the circumferential direction of the front leg rod 1 or the rear leg rod 2 when it is rotated about 90 degrees to the left and right with respect to the axial direction of the. ing. (See Figure 4)

Reference numeral 41g is a crank arm for driving the rotation of the drive gear 4g, and the base end portion is fixed to the back surface of the drive gear 4g.

Reference numeral 42 is a drive link for driving the crank arm 41g of the drive gear 4g attached to the front leg rod 1, the lower end of which is connected to the upper end of the crank arm 41g, and the upper end is the upper end of the front leg rod 1. It is connected to the central portion of a folding link 82 that is provided between the vicinity and the upper end portion of the folding operation bracket 9. (See FIGS. 2 and 4)

Reference numeral 43 denotes a drive link for driving the crank arm 41g of the drive gear 4g attached to the rear leg rod 2. The lower end is connected to the upper end of the crank arm 41g, and the upper end is a folding operation bracket. It is connected to the lower end of 9.

The lower end portion of the folding operation bracket 9 is made to project a little longer than the shaft attachment portion for the rear leg rod 2, and the upper end portion of the drive link 43 is coupled and locked to the protruding tip portion. . (See FIGS. 2 and 4)

Reference numeral 10 denotes a protective cover attached so as to cover the entire passive gear 4g and drive gear 1g, and only the upper end of the crank arm 41g is exposed.

[0023]

[Operation of the device]

 The present invention constructed as described above operates as follows.

(1) Folding operation of the stroller When folding the stroller A, when the operation knob 71 of the opening / closing operation section 7 provided on the push rod 5 is pushed inward by a known operation means, the tip of the operation knob 71 is driven. Rotate plate 73.

As the drive plate 73 rotates, the operation wire 72 is pulled upward, and in conjunction with this, an elevator (not shown) attached to the tip of the operation wire 72 rises.

When an elevating body (not shown) attached to the tip of the operation wire 72 rises in conjunction with the elevation of the operation wire 72, the opening / closing operation lock body 8 rises, and as a result, the opening / closing operation lock body. The engagement between the engagement portion 81 formed on the lower surface of 8 and the engagement portion 91 formed on the upper portion of the folding operation bracket 9 is released.

When the lock body 8 for opening / closing operation and the folding operation bracket 9 are released from each other, the folding operation bracket 9 is folded while being rotated along the rear leg rod 2 so that the upper end portion of the folding operation bracket 9 faces downward. (Folded in the direction indicated by the arrow a in FIG. 2), at the same time, the armrest rod 3 and the base ends of the folding links 82 also move downward, and in conjunction with this movement, the front leg rod 1 and the rear leg rods are linked. As the distance between the stroller A and the stroller A approaches, the stroller A is folded back and forth. (See Figure 4)

Since the drive link 43 is attached between the lower end portion of the folding operation bracket 9 and the upper end portion of the crank arm 41g of the drive gear 1g attached to the rear leg rod 2, the folding operation bracket 9 is shown in FIG. When folded in the direction indicated by the arrow a in FIG. 2, the drive link 43 connecting the upper end portion to the lower end portion of the folding operation bracket 9 is lifted in the direction indicated by the arrow a'in FIG.

To move the drive link 43 in the ascending direction, the crank arm 41g connecting the lower ends is pulled up at the same time, but the base end of the crank arm 41g is fixed to the drive gear 1g. The driving gear 1g is also rotated at the same time, and at the same time, the passive gear 4g is rotated.

Since the passive gear 4g is attached to the upper ends of the cylindrical portions 41b, 41b formed at both ends of the connecting rod 4b which can be bent, the passive gear 4g is rotated to rotate the connecting rod 4b. The cylindrical portions 41b, 41b formed on both ends are respectively rotated inward by the same rotation angle, and folding in the width direction is simultaneously performed. (See Figure 4)

The above operation is the same as in the front leg rod 1, and when the drive link 42 whose upper end is connected to the center of the folding link 82 descends in conjunction with the folding operation of the folding bracket 9 (FIG. 2). 2), the drive link 42 descends, lowers the crank arm 41g in the direction indicated by arrow b in FIG. 2, and simultaneously causes the drive gear 1g and the passive gear 4g to rotate. , Fold the connecting rod 4a in a U shape. (See Figure 4)

(2) Assembling Operation of Stroller When assembling the stroller A in the folded state as illustrated in FIG. 4, the operation completely opposite to the folding operation may be performed. I.e.

As shown in FIG. 4, the stroller is folded in a state where the front leg rod 1 and the rear leg rod 2 are close to each other and the connecting rods 4a, 4b, 4c are close to each other in the width direction. When the opening / closing operation portion 7 provided on the hand pushing rod 5 is operated to release the lock of the lock mechanism 6 and then the hand pushing rod 5 is raised in the right direction in FIG. 4, in conjunction with this, the base end portion of the armrest rod 3 The base end of the folding operation block 9 and the rear end of the folding link 82 are pulled up to the positions shown in FIG. (Pull up in the direction indicated by arrow a in Fig. 4.)

As shown in FIG. 2, when the armrest rod 3, the folding operation bracket 9 and the folding link 82 are pulled up to a horizontal position, the folding operation bracket 9 located above in FIG. Since the lower end of the crank arm 41g descends with the shaft attachment as a pivot point, and the drive link 43 also descends at the same time, the tip end of the crank arm 41g is rotated in the direction indicated by arrow a'in FIG. As a result, the driving gear 1g and the passive gear 4g are rotated, and the connecting rod 4b folded in a U shape is made into a single linear rod.

Simultaneously with the above operation, when the folding link 82 is pulled up to a horizontal state, the drive link 42 is also pulled up in association with the movement, and at the same time, the crank arm 41g is moved in the direction indicated by the arrow b ′ in FIG. Pull up.

The drive gear 1g and the passive gear 4g are rotated by pulling up the crank arm 41g, and the assembly of the stroller A is completed by using the connecting rod 4a as one linear rod.

[0037]

[Effect of device]

 As described above, the present invention is formed at both ends of the connecting rod 4a extending between the front leg rods 1 and 1 facing each other and the connecting rod 4b extending between the rear leg rods 2 and 2 facing each other. Passive gears 4g, 4g made of bevel gears are attached to the upper portions of the cylindrical portions 41a, 41a 'and 41b, 41b', and the bevel gears are also attached to the side surfaces of the front and rear lever rods 1, 1 and 2, 2 corresponding thereto. The drive gears 1g and 1g are attached to the lower end of the folding bracket 9 and the folding link 82 via the crank arm 41g and the folding drive links 42 and 43. Since it is connected, when the baby car skeleton is folded in the front-back direction, the widthwise folding is performed at the same time as this, and like the conventional stroller, the first folding operation that brings the body closer to the front-back direction is performed. To have an advantage that can completely eliminate the inconvenience of performing a second folding operation to approximate the skeleton in the width direction separately.

[Brief description of drawings]

FIG. 1 is a perspective view of a stroller in which a seat portion is omitted to show a main portion.

FIG. 2 is a side view of FIG.

FIG. 3 is a rear view of FIG.

FIG. 4 is a side view showing a state in which the skeleton body is brought close to the front and rear direction and folded.

FIG. 5 is an enlarged front view of the main part with a part omitted.

FIG. 6 is a partially cutaway plan view showing an opening / closing operation section.

[Explanation of symbols]

 A stroller 1 front leg rod 2 rear leg rod 3 armrest rod 4a connecting rod 4b connecting rod 1g driving gear 4g passive gear 41a cylindrical portion 41b cylindrical portion 41g crank arm 42 driving link 43 driving link 4c connecting rod 5 hand pushing rod 51 Gripping rod 52 Straight rod 6 Locking mechanism for maintaining folding 7 Opening / closing operation part 72 Operating wire 8 Locking body for opening / closing operation 81 Folding link 9 Folding operation bracket 10 Cover

Claims (1)

[Scope of utility model registration request] 1. A pair of front leg rods, a pair of rear leg rods, a pair of armrest rods, and a pair of front and rear leg rods are erected from an intermediate portion of several connecting rods and rear leg rods. In a stroller configured to be foldable with a push rod, a connecting rod connecting the front leg rods in the width direction and a connecting rod connecting the rear leg rods in the width direction are each foldable, and the connecting rod The cylindrical parts formed at both ends are rotatably attached to the front leg rod or the rear leg rod, and a passive gear consisting of a bevel gear is integrally attached to the upper part of the cylindrical part,
A drive gear is rotatably attached to the side faces of the front and rear leg rods corresponding to the passive gear, and a crank arm base having an appropriate length is provided on the rear surface of the drive gear rotatably attached to the front and rear leg rods. With the end fixed, pass the drive link between the upper end of the crank arm attached to the front leg rod and the middle of the folding link, and the upper end of the crank arm attached to the rear leg rod and the lower end of the folding operation bracket. A folding mechanism for a stroller that connects a drive link to the section.