JP2010064731A - Travel direction lock mechanism for wheel of baby carriage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a travel direction lock mechanism for wheels of a baby carriage which is convenient for travel direction locking operation. <P>SOLUTION: The travel direction lock mechanism of wheel in the baby carriage includes a positioning seat provided among a frame of the baby carriage and the wheels and at a lower end of the frame and having a first pivotal-contact part and first positioning parts provided in each of front and rear sections of the outer periphery of the first pivotal-contact part and a rotary seat to which the wheels are attached and which includes a second pivotal-contact part coming into contact pivotally with the first pivotal-contact part to rotate the wheels freely and a second positioning part interfering with the first positioning parts to lock the direction of travel of the wheels and has a slide member arranged to slide vertically at an upper end of it. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a stroller, and more particularly to a traveling direction locking mechanism for wheels in a stroller.

  As shown in FIGS. 8 and 9, a wheel travel direction locking mechanism in a stroller posted in Patent Document 1 which is a conventional technique is provided with a connecting sleeve 1 at a lower end of a support frame 10. 2 is provided, a holding body 3 is connected to the lower end of the pivot 2, guide rails 13 and 5 are provided on the coupling sleeve 1 and the holding body 3, respectively, and the sliding block 4 is provided on the guide rails 13 and 5. Are provided to slide. The holding body 3 is further connected to a front wheel (not shown). When the direction of the front wheel of the stroller is freely steered, as shown in FIG. 8, when the sliding block 4 is fixed to the rail 13 of the connecting sleeve 1 and the direction of the front wheel of the stroller is fixed, the holding body 3 After the front wheel is rotated so that the rail 5 of the connecting sleeve 1 and the rail of the connecting sleeve 1 are aligned, the sliding body 4 slides downward so as to straddle the rail 13 of the connecting sleeve 1 and the rail 5 of the holding body 3 ( As shown in FIG. 9, the front wheel direction is fixed.

However, in the conventional traveling direction locking mechanism, when the direction is locked, the sliding block 4 is smoothly moved unless the front wheel is rotated so that the rail 5 of the holding body 3 and the rail of the connecting sleeve 1 are aligned. Since it is not possible to move downward and the front wheel traveling direction cannot be locked, such an operation method is inconvenient and needs to be further improved.
US Pat. No. 4,608,729

  Therefore, an object of the present invention is to provide a traveling direction locking mechanism for wheels in a stroller that is convenient for a traveling direction locking operation.

  The wheel travel direction locking mechanism in the stroller according to the present invention is provided between the frame and the wheel of the stroller and is provided at the lower end of the frame, and the first pivot part and the first pivot part. A positioning sheet having a first positioning portion installed before and after the outer periphery of the wheel, and a rotating sheet to which the wheel is attached, wherein the wheel is rotatable and pivotally connected to the first pivoting portion. And a second positioning portion for interfering with the first positioning portion so as to lock the traveling direction of the wheel, and a vertically slidable portion. And a rotating sheet having a sliding member.

  As described above, the wheel travel direction locking mechanism in the stroller according to the present invention is provided at the lower end of the frame and has a positioning sheet having the first positioning portion at the lower end, and the wheel is attached and coupled to the positioning sheet. And the second positioning portion of the sliding member is the first positioning portion, and the second positioning portion of the sliding member is provided with a second positioning portion at the upper end thereof. Since the direction of the wheel can be steered in an arbitrary direction when it does not interfere with the vehicle, the stroller can be driven in an arbitrary direction. Since it is only necessary to slide the moving member upward so that the second positioning portion interferes with the first positioning portion, the traveling direction locking operation becomes very convenient.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is an external perspective view of a traveling direction locking mechanism 100 and wheels 20 according to the present invention. As shown in FIG. 1, the wheel travel direction locking mechanism 100 in the stroller according to the present invention is provided between a stroller frame (not shown) and the wheel 20, and the travel direction locking mechanism 100 includes a positioning sheet. 30 and a rotating sheet 50 pivotally connected to the positioning sheet. A sliding member 90 is slidably disposed on the rotating sheet 50. A locking portion 92 is provided at the upper end of the sliding member 90. When the sliding member 90 is pushed upward, the locking portion 92 is inserted into the positioning sheet 30 to lock the traveling direction of the wheel 20.

  FIG. 2 is an exploded perspective view of the traveling direction locking mechanism 100 according to the present invention. As described above, the traveling direction locking mechanism 100 includes the positioning sheet 30, the rotating sheet 50, and the sliding member 90. As shown in the bottom view of FIG. 4, the positioning sheet 30 is provided on each of the front and rear sides so as to face the ring-shaped groove 32 (range depicted by a broken line) directed downward and the radial direction of the ring-shaped groove 32. Arcuate grooves 36,38.

  As shown in FIG. 2, the upper end of the rotating seat 50 is provided with a sleeve 52 that pivots in the ring-shaped groove 32 (shown in FIGS. The traveling direction can be changed freely. As shown in FIGS. 5 and 6, the pivotal connection between the positioning sheet 30 and the rotating sheet 50 is performed via a central pivot 53 protruding from the rotating sheet 50 and a bearing 33 disposed at the lower end of the positioning sheet 30. Done. As shown in FIGS. 3 and 7, two lateral hooks 55 are provided at the end of the central pivot 53, and these lateral hooks 55 are locked from below to the upper edge of the bearing 33 through the bearing 33, thereby positioning sheets. 30 may be pivotally fixed to the rotating seat 50. In addition, it is preferable that the extending directions of the two lateral hooks 55 are opposite to each other. It goes without saying that the positions of the bearing 33 and the central pivot 53 can be interchanged. That is, by providing a bearing on the rotating sheet 50 and also providing a pivot at the lower end of the positioning sheet 30, the pivoting and fixing action can be applied in the same manner as described above.

  As shown in FIG. 2, a lock portion 92 having a width wider than the width of the sliding member 90 main body is integrally formed at the upper end of the sliding member 90 main body, and in the middle of the longitudinal direction of the sliding member 90 main body. Are provided with two L-shaped members 94 (only one is shown in the drawing) that extend in opposite directions at the respective ends and engage with an engaging groove 56 (shown in FIG. 2) described later. . At the lower end of the sliding member 90, a rib 96 for pressing the sliding member 90 by the user is projected, and an engaging portion 98 is provided in a direction opposite to the projecting direction of the rib 96. It is done. Below the lock portion 92 of the sliding member 90, when the return spring 60 is disposed in the slide groove 54, a horizontal plate 95 that serves as a stopper for the return spring 60 (shown in FIGS. 5 and 6). Is provided.

  The rotating sheet 50 is provided with a sliding groove 54 extending in the vertical direction. By setting the width of the sliding groove 54 to match the width of the sliding member 90, The sliding member 90 can be slid up and down. As shown in FIGS. 2 and 3, from the middle to the upper end of the sliding groove 54, the engaging groove 56 that slides up and down the lock portion 92 and the L-shaped member 94 of the sliding member 90 therein. Is provided. By disposing both the lock portion 92 and the L-shaped member 94 in the engaging groove 56, the sliding member 90 can be freely slid up and down, and the sliding member 90 can be prevented from falling off from the engaging groove 56. it can. Further, as shown in FIG. 2, the slide groove 54 is mounted on the rotary seat 50 by housing a return spring 60 that is fixed to a convex column 57 whose lower end is disposed at the lower end of the engagement groove 56. An upward biasing force is applied to the sliding member 90 formed. Further, a claw portion 58 is provided at the lower edge of the sliding groove 54 of the rotating sheet 50, and when the sliding member 90 is pushed downward, the engaging portion 98 at the lower end thereof is engaged with the claw portion 58. By doing so, the sliding member 90 is fixed.

  FIG. 5 is a cross-sectional view of the traveling direction locking mechanism 100 according to the present invention. In the case shown in FIG. 5, the rib 96 of the sliding member 90 is pushed downward to fix the engaging portion 98 to the claw portion 58 at the lower end of the rotating sheet 50 and at the upper end of the sliding member 90. Since the lock portion 92 is not inserted into the arc-shaped groove 36 (38), the wheel (not shown) can be steered in an arbitrary direction. At this time, the return spring 60 housed in the sliding groove 54 is compressed by the horizontal plate 95 below the lock portion 92.

  When the user moves the rib 96 of the sliding member 90 forward, the engaging portion 98 of the sliding member 90 is detached from the claw portion 58 at the lower edge of the sliding groove 54 of the rotating sheet 50. The sliding member 90 naturally moves upward along the sliding groove 54 by the biasing force of the return spring 60, and the lock portion 92 at the upper end of the sliding member 90 is positioned in the arc-shaped groove 36 (38). Thus, as shown in FIG. 6, the traveling direction of the wheel is locked so that it cannot be arbitrarily steered. When the user arbitrarily steers the traveling direction of the wheel, the rib 96 of the sliding member 90 is pushed downward to engage and fix the engaging portion 98 to the claw portion 58, so that the traveling direction of the wheel is changed. It can also be steered arbitrarily. In addition, as shown in FIG. 6, inclined surfaces corresponding to the lower edge of the engaging portion 98 and the upper edge of the claw portion 58 are formed, so that the sliding member 90 is moved downward.

  As described above, the traveling direction locking mechanism of the present invention has been described based on specific members and shapes, but the present invention is not limited to the above embodiments. It should be understood that any change or modification that can be considered by the person having ordinary knowledge in the technical field of the present invention as a gist of the present invention is also included in the scope of the present invention. For example, in the embodiment, the lock portion 100 is formed in a tongue shape so as to correspond to the two arc-shaped grooves 36 and 38, but the lock portion 100 may be formed in a rectangular shape or a square shape. Although the elastic member has been described as having a return spring, other elastic bodies such as rubber may be used. Further, in the above-described embodiment, the sliding member 90 is coupled to the sliding groove 54 by the separate L-shaped member 94. However, by further extending the lock portion 92 to the L-shaped member, the sliding member 90 is further extended. A strong bond may be provided.

It is a perspective view of the running direction lock mechanism concerning the present invention. It is a disassembled perspective view of the traveling direction lock mechanism which concerns on this invention. It is a top view explaining the relationship between the rotation sheet | seat and sliding member in the traveling direction lock mechanism which concerns on this invention. It is a bottom view which shows the positioning sheet in the traveling direction lock mechanism which concerns on this invention. It is a schematic cross section which shows the case where the traveling direction of the wheel by the traveling direction lock mechanism which concerns on this invention is not locked. It is a schematic cross section which shows the case where the traveling direction of the wheel by the traveling direction locking mechanism which concerns on this invention is locked. It is sectional drawing for demonstrating the horizontal hook in the traveling direction lock mechanism which concerns on this invention. It is a schematic cross section which shows the case where the direction of the wheel by the driving direction lock mechanism of the conventional front wheel is not locked. It is a schematic cross section which shows the case where the direction of the wheel by the conventional traveling direction lock mechanism of the front wheel is locked.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Connection sleeve 2 Axis 3 Holding body 4 Sliding block 5 Guide rail 10 Support frame 13 Guide rail 20 Wheel 30 Positioning sheet 32 Ring-shaped groove 33 Bearing 36 Arc-shaped groove 38 Arc-shaped groove 50 Rotating sheet 52 Sleeve 53 Central pivot 54 Sliding groove 55 Lateral hook 56 Engaging groove 57 Convex column 58 Claw part 60 Return spring 90 Sliding member 92 Locking part 94 L-shaped member 95 Horizontal plate 96 Rib 98 Engaging part 100 Traveling direction lock mechanism

Claims (18)

A travel direction locking mechanism for a wheel in a stroller provided between the frame and the wheel of the stroller,
A positioning sheet provided at the lower end of the frame and having a first pivot part and a first positioning part;
A rotating seat to which the wheel is attached, a second pivot part for pivoting with the first pivot part so that the wheel can rotate, and an upper end of the second pivot part in a traveling direction of the wheel A second positioning portion for interfering with the first positioning portion so as to lock the first positioning portion, and a rotating member arranged so as to be vertically slidable and an elastic member, and the rotating sheet,
In the wheel traveling direction locking mechanism equipped with
When the second positioning portion and the first positioning portion do not interfere with each other, the sliding member compresses the elastic member to accumulate an urging force, and the rotating sheet is against the positioning sheet. Can be rotated,
When the rotating sheet is rotated so that the second positioning part is aligned with the first positioning part, the sliding member is operated by the urging force of the elastic member, and the second positioning part And the first positioning portion interfere with each other, and the rotating seat locks the rotation of the positioning seat relative to the positioning seat.   2. The wheel travel direction locking mechanism in the stroller according to claim 1, wherein the first pivot part is a bearing, and the second pivot part is a pivot.   2. The wheel travel direction locking mechanism in the stroller according to claim 1, wherein the first pivot part is a pivot and the second pivot part is a bearing. 3.   The end of the pivot has a pair of lateral hooks whose projecting directions are opposite to each other, and the positioning sheet and the rotating sheet are coupled by locking the lateral hook to the bearing. A wheel travel direction locking mechanism in the stroller according to claim 2 or 3.   The wheel direction lock mechanism for a stroller according to claim 1, wherein the first positioning portion is a concave groove.   The travel direction of the wheel in the stroller according to claim 5, wherein the concave groove includes a first concave groove and a second concave groove that are located on both sides of the positioning sheet facing each other in the radial direction. Lock mechanism.   The wheel travel direction locking mechanism in the stroller according to claim 6, wherein a cross section of the concave groove is an arc shape, a rectangle shape or a square shape.   6. The wheel travel direction locking mechanism for a stroller according to claim 5, wherein the second positioning portion is a positioning column.   The wheel running direction locking mechanism in the stroller according to claim 1, wherein the rotating seat has a sliding groove, and the sliding member slides in the sliding groove.   A lower edge of the sliding groove has a claw portion, and a lower end of the sliding member has an engaging portion corresponding to the claw portion, and the sliding member slides downward. The wheel travel direction locking mechanism in the stroller according to claim 9, wherein the engaging portion can be engaged with the claw portion.   By providing a slope on the upper edge of the claw portion and a slope corresponding to the lower edge of the engagement portion, it is possible to easily slide the slide member downward. The wheel travel direction locking mechanism in the stroller according to claim 10.   11. The sliding member is provided with a rib extending in a direction opposite to a protruding direction of the engaging portion, so that the claw portion can be easily detached from the engaging portion. Wheel direction lock mechanism for the stroller as described in 1.   The wheel travel direction locking mechanism for a stroller according to claim 10, wherein the second positioning portion and the rib are provided at both ends of the sliding member facing each other in the vertical direction.   The rotating sheet further includes an engaging groove communicating with the sliding groove, and the second positioning portion is slidably installed in the engaging groove. Wheel direction lock mechanism for the stroller as described in 1. The sliding member has a main body surface and an L-shaped member, and the L-shaped member extends to a side opposite to the main body surface;
The wheel travel in the stroller according to claim 14, wherein the sliding member is prevented from being detached from the sliding groove by positioning an end portion of the L-shaped member in the engagement groove. Direction lock mechanism.   The L-shaped member includes a first L-shaped member and a second L-shaped member, and an end of the first L-shaped member and an end of the second L-shaped member are included. The wheel travel direction locking mechanism in the stroller according to claim 15, wherein the travel direction lock mechanism projects in directions opposite to each other.   The wheel rotation direction locking mechanism in the stroller according to claim 9, wherein the rotating seat is provided with a convex column at an end of the sliding groove, and the elastic member is attached to the convex column.   The wheel of the stroller according to claim 17, wherein the sliding member is provided with a horizontal plate so as to protrude laterally, and the elastic member is provided between the horizontal plate and the convex column. Travel direction lock mechanism.

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