JP2542122Y2 - Stroller folding mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding mechanism for a stroller, and more particularly to a structure in which a stroller body can be compactly folded in the front-rear direction and the width direction in response to the operation of an opening / closing operation mechanism provided on a pushrod. The present invention relates to a folding mechanism for a baby stroller.

[0002]

2. Description of the Related Art A first folding operation is performed by moving the stroller body in the front-rear direction, and then several connecting rods inserted between a pair of opposing leg rods are folded in the width direction so that the entire stroller is flat. A stroller configured to be folded in a letter shape is conventionally known.

[0003]

However, the stroller of the conventional structure has a structure for approaching the stroller body in the front-rear direction, and a plurality of connecting rods and a hand pushing rod inserted between two opposing leg rods. The structure for folding in the width direction is separately configured, and there was no interlocking movement of both, so in conjunction with the folding of the skeleton in the front-back direction,
The connecting rod could not be automatically folded in the width direction.

[0004] For this reason, when folding a stroller of the conventional structure, a first folding operation is performed in which the frame is approached in the front-rear direction to fold the stroller. It is necessary to perform the second folding operation of folding the rod in the width direction, and there is a disadvantage that the two operations do not have interlocking action and the folding operation is complicated as a whole.

[0005]

The object of the present invention is to cope with the above situation. 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, the leg is interlocked with this movement. The driving gears mounted on the rods rotate the driving gears mounted on the base ends of the several connecting rods spanned between the opposing leg rods, whereby the several connecting rods automatically move in the width direction. A stroller folding mechanism configured to perform a folding operation is provided.

[0006]

SUMMARY OF THE INVENTION In the present invention, a pair of front leg rods, a pair of rear leg rods, a pair of armrest rods, and the lengths of connecting the pair of front leg rods and the rear leg rods in the width direction are substantially equal. A connecting rod that is pivotally mounted at a position where it can be separated, a push rod that stands upright from an intermediate portion of the rear leg rod, and a folding operation bracket that connects the push rod and the rear leg rod by a pivot. A stroller configured to be foldable by a folding link that is inserted between an end of the folding operation bracket on the push rod side and near an upper end of the front leg rod, and formed on both ends of the connecting rod. and, said front Ashi杆and a cylindrical portion rotatably mounted on said rear leg rod, and a passive gear consisting of bevel gear integrally attached to the top of each cylindrical portion, said front Ashi杆and corresponding to the passive gear Said A drive gear rotatably mounted on the side surface of the leg rod so as to mesh with the passive gear, a crank arm having a predetermined length with a base end fixed to the back surface of the drive gear, and a crank mounted on the front leg rod A first drive link extending between an upper end of the arm and an intermediate portion of the folding link; an upper end of a crank arm attached to the rear leg rod; and a rear leg side end of the folding operation bracket. The main point of the present invention is a folding mechanism for a stroller, which is provided with a second drive link inserted between the folding mechanism and the stroller.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

A stroller indicated generally by A connects a pair of opposed front leg rods 1, 1 , a pair of rear leg rods 2 , 2 , a pair of armrest rods 3 , 3, and a front leg rod in the width direction. Front leg connection
A rod 4a and a rear leg connecting rod 4b for connecting the rear leg rod in the width direction.
And a pair of folding links 82, 82 described later in the width direction.
It is configured to be foldable by a foldable link connecting rod 4c that is connected in the opposite direction and a push rod 5 that stands up from an intermediate portion between the rear leg rods 2 and 2.

The push rod 5 is formed by bending both ends into an L-shape so as to have a substantially U-shaped front view.
And two straight rods 52, 52 extending linearly from both ends of the gripping rod 51 via the lock mechanisms 6, 6 for maintaining the folding so that the overall shape becomes a U-shape or an inverted U-shape. Is formed.

The lock mechanisms 6 and 6 for maintaining the folded state are provided at a connecting portion between the gripping rod 51 and the straight rod 52.
A lock body (not shown) provided at the end on the side of
1 is moved up and down in conjunction with an operation wire 72 which is moved up and down by operation of the opening / closing operation unit 7 provided at 1, and is fitted to a lock receiving body (not shown) provided at the end on the side of the straight rod 52, whereby a hand-push rod 5 is maintained in a folded or unfolded state.

When the operation knob 71 is pushed in, the opening / closing operation section 7 attached to the gripping rod 51 rotates the disk-shaped driving plate 73 having its distal end engaged with the end of the operation wire 72 around the circumference.
The operation wire 72 is pulled up (moved up and down) by the rotation of the drive plate 73.

[0012] the locking body 8 for opening and closing operation, and the lower end portion of the hand-push rod 5, mounted vertically movably in the slightly upper position than the pivotally connected portion between the folding operation bracket 9, notches the lower end surface in an L-shape L formed at the tip of the folding operation bracket 9 when the stroller is assembled.
The stroller is maintained in an assembled state by fitting the locking portion 81 into the letter-shaped fitting portion 91.

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

The connecting rod 4a for connecting the pair of front leg rods 1 and 1 in the width direction and the connecting rod 4b for connecting the pair of rear leg rods 2 and 2 in the width direction each have a length substantially equal to three. The shaft is mounted so as to be foldable, and cylindrical portions 41a formed at both ends are provided.
41a and 41b, 41b are connected to the front leg rods 1, 1 and the rear leg rods 2,
It is rotatably mounted on the outer circumference of.

The other connecting rod 4c has two ends fixed to the center of a folding link 82 extending between the front leg rod 1 and the folding bracket 9, and the intermediate part is a shaft rod divided into several pieces. Are pivotally mounted via a pivot.

Cylindrical parts 41 formed at both ends of the connecting rod 4a
On the upper portions of the cylindrical portions 41b, 41b formed at both ends of the connecting rods 4a, 41a, passive gears 4g, 4g having a size substantially corresponding to the outer diameter of the cylindrical body are integrally formed. The drive gears 1g, 1g rotatably mounted on the front leg rod 1 and the rear leg rod 2 so as to be rotatable at right angles to the axial direction.

The passive gear 4g and the drive gear 1g are formed as bevel gears in which the inclined tooth surface is cut on the peripheral edge of the disk-shaped body, and the drive gear 1g is composed of the front leg rod 1 or the rear leg rod 2. When rotated about 90 degrees to the left and right with respect to the axial direction of
The passive gear 4g is configured to rotate forward or backward in the circumferential direction of the front leg rod 1 or the rear leg rod 2 within a range of about 90 degrees. (See Fig. 4)

[0018] 41g is a crank arm for driving the rotation of the driving gear 1 g, securing the base end portion on the rear surface of the drive gear 1 g.

Reference numeral 42 denotes a driving gear 1 attached to the front leg rod 1.
a first drive link for driving the crank arm 41g of g, and connecting the lower end to the upper end of the crank arm 41g, the upper end portion of the front hand杆側 end of the operating bracket 9 and folding near the top of Ashi杆1 It is connected to the central part of the folding link 82 inserted between the two. (FIG. 2,
(See Fig. 4)

Reference numeral 43 denotes a driving gear 1g attached to the rear leg rod 2.
Of a second drive link for driving the crank arm 41 g, connecting the lower end to the upper end of the crank arm 41 g, was coupled to the rear leg杆側 <br/> end of the operating bracket 9 fold the upper portion ing.

The lower end of the folding operation bracket 9 protrudes slightly below the shaft attachment portion to the rear leg rod 2, and the upper end of the drive link 43 is connected to the protruding front end.
Tied . (See FIGS. 2 and 4)

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

[0023]

The operation of the present invention configured as described above operates as follows.

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

With the rotation of the driving plate 73, the operation wire 72 is pulled upward, and in conjunction with this, an elevating body (not shown) attached to the tip of the operation wire 72 is raised.

When the lifting / lowering body (not shown) attached to the tip of the operation wire 72 rises in conjunction with the rise of the operation wire 72, the opening / closing operation lock body 8 connected thereto rises, and as a result, the opening / closing operation lock body Locking portion 81 formed on the lower surface of 8
When the fitting of the fitting portion 91 formed on an upper portion of the folding operation bracket 9 is opened.

When the engagement between the opening / closing operation lock body 8 and the folding operation bracket 9 is released, the folding operation bracket 9 is folded while rotating along the rear leg 2 so that the upper end of the folding operation bracket 9 faces downward. (Folded in the direction indicated by the arrow a in FIG. 2), and at the same time, the bases of the armrest rod 3 and the folding link 82 also move downward, and in conjunction with this movement, the front leg rod 1 and the rear leg rod 2 , And the stroller A is folded back and forth. (See Fig. 4)

A lower end of the folding operation bracket 9;
Crank arm 4 of driving gear 1g attached to rear leg 2
When the folding operation bracket 9 is folded in the direction indicated by the arrow a in FIG. 2 because the drive link 43 is attached between the driving link 43 and the upper end of the folding operation bracket 9, the upper end is connected to the lower end of the folding operation bracket 9. Drive link 43 is shown in FIG.
In the direction indicated by arrow a '.

When the drive link 43 is moved in the upward direction, the distal end of the crank arm 41g to which the lower end is connected is pulled up at the same time.
g, the driving gear 1g is simultaneously rotated, 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, both ends of the connecting rod 4b are rotated by the rotation of the passive gear 4g. The cylindrical portions 41b, 41b formed at the same time rotate inward by the same rotation angle, and the folding in the width direction is performed at the same time. (See Fig. 4)

The above operation is the same for the front leg rod 1, and the upper end is connected to the center of the folding link 82.
Rotates in conjunction with the folding operation of the operating bracket 9 the first drive link 42 is folded Then (In Fig. 2 an arrow a
Rotation Then) in the direction indicated by being rotated in the crank arm 41g also Figure 2 in the direction indicated by the arrow b, to perform the rotation to the drive gear 1g and passive gear 4g simultaneously, connecting rod 4
a is Ru folded in a U-shape in the axial attachment point. (See Fig. 4)

(2) Operation of assembling the stroller Stroller A in a folded state as shown in FIG.
When assembling, the operation just opposite to the above-mentioned folding operation may be performed. That is

As shown in FIG. 4, the distance between the front leg rod 1 and the rear leg rod 2 is reduced, and the connecting rods 4a, 4b, 4c
By operating the opening / closing operation portion 7 provided on the push rod 5 of the stroller folded in a state where the push rod 5 is approached in the width direction, the locking mechanism 6 is released, and the push rod 5 is raised rightward in FIG. And in conjunction with this, the armrest rod 3 and
Pivot portion with rod 52 , folding operation block 9 and straight rod 5
2 and the rear end of the folding link 82 are pulled up to positions as shown in FIG. (Pull up in the direction indicated by arrow a in FIG. 4)

As shown in FIG. 2, the ends of the armrest rod 3 and the folding operation bracket 9 are in series with the end of the straight rod 52.
When the folding link 82 is pulled up to a position where the folding link 82 is in a horizontal state, the lower end of the folding operation bracket 9 located above in FIG. As a result, the tip of the crank arm 41g is rotated in the direction indicated by the 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 formed into one linear rod.

At the same time as the above operation, the folding link 8
When the lever 2 is pulled up to a horizontal state, the drive link 42 is also pulled up in conjunction with the movement, and at the same time, the crank arm 41g of the front leg 1 is pulled up in the direction indicated by the arrow b 'in FIG. .

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

[0037]

As described above, the present invention provides a pair of front leg bars, a pair of rear leg bars, a pair of armrest bars, and a length connecting the pair of front leg bars and rear leg bars in the width direction. The connecting rod is pivotally attached at a position where the rod is substantially equally divided, the push rod erecting from the intermediate portion of the rear leg rod, and the push rod and the rear leg rod are respectively connected by pivots. A stroller configured to be foldable by a folding operation bracket and a folding link inserted between an end of the folding operation bracket on the push rod side and near an upper end of the front leg rod, Cylindrical parts formed at both ends and rotatably attached to the front leg rod and the rear leg rod, a passive gear composed of a bevel gear integrally attached to the upper part of each cylindrical part, and correspond to the passive gear Before said A lever and a drive gear rotatably mounted on the side meshes with the passive gear position of the rear leg rods and crank arm having a predetermined length to secure the proximal portion to the back of the drive gear, the front Ashi杆A first drive link extending between an upper end portion of the crank arm attached to the rear link and an intermediate portion of the folding link; an upper end portion of the crank arm attached to the rear leg rod; and a rear leg rod of the folding operation bracket. Since the second drive link is provided between the stroller and the side end, when the stroller body is folded in the front-rear direction, the widthwise folding is performed at the same time in conjunction with the folding, and as in the conventional stroller. In addition, the excellent advantage that the inconvenience of separately performing the second folding operation for approaching the skeleton in the width direction after the first folding operation for approaching the skeleton in the front-back direction can be completely eliminated. To.

[Brief description of the drawings]

FIG. 1 is a perspective view of a stroller, showing a main part, with a seat floor portion omitted.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a rear view of FIG. 1;

FIG. 4 is a side view showing a state in which the skeleton is folded in such a manner as to approach in the front-rear direction.

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

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

[Explanation of symbols]

A stroller 1 front leg rod 2 rear leg rod 3 armrest rod 4a front leg connecting rod 4b rear leg connecting rod 1g driving gear 4g passive gear 41a cylindrical part 41b cylindrical part 41g crank arm 42 first drive link 43 second drive link 4c folding Link connecting rod 5 push rod 51 gripping rod 52 straight rod 6 lock mechanism for maintaining folding 7 opening / closing operation section 72 operating wire 8 opening / closing operation lock body 82 folding link 9 folding operation bracket 10 cover

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of front leg bars, a pair of rear leg bars, a pair of armrest bars, and a position at which the pair of front leg bars and rear leg bars are connected to each other in the width direction at substantially equal lengths. A foldable connecting rod, a push rod erecting from an intermediate portion of the rear leg rod, a folding operation bracket respectively connecting the push rod and the rear leg rod by a pivot, and the folding In a stroller configured to be foldable by a folding link inserted between an end of the operation bracket on the push rod side and near an upper end of the front leg rod, the stroller is formed at both ends of the connecting rod, Rod
A cylindrical portion and mounted rotatably on said rear leg rod, which
A passive gear consisting of a bevel gear integrally attached to the upper part of each cylindrical portion, and rotating to a position where the side surfaces of the front leg and the rear leg corresponding to the passive gear mesh with the passive gear. A drive gear mounted so as to be capable of being mounted, a crank arm of a predetermined length having a base end fixed to the back of the drive gear, an upper end of the crank arm mounted on the front leg rod, and an intermediate portion between the folding links. And a second drive link extending between the upper end of the crank arm attached to the rear leg rod and the rear leg side end of the folding operation bracket. A stroller folding mechanism, characterized in that: