JPS6342063Y2 - - Google Patents

Description

[Detailed Description of the Invention] Field of the Invention This invention relates to a connection structure between a pair of push rods of a baby carriage and a push rod connecting rod connected between the pair of push rods. When the distance between a pair of push rods becomes wider or narrower depending on the opening/closing operation of the push rod, the distance between the pair of push rods becomes wider or narrower. This relates to the structure of the connecting part.

Description of Prior Art Various types of folding operations for folding baby carriages have been proposed, and one typical example is as follows. Usually, a baby carriage is equipped with a push rod for pushing and controlling the stroller, but when a pair of such push rods is provided on the left and right, there is a width between the pair of push rods. Push rod connecting rods are often connected in a state extending in the direction. When focusing on the folding operation of the baby carriage, when the baby carriage is in the open state, the pair of push bars are kept at a predetermined distance, and when the baby carriage is in the closed state, the distance between the pair of push bars is narrowed. There is a folding baby carriage with a similar structure. In this case, the push rod connecting rod is configured to be rotatable relative to the push rod, and this rotational movement changes the distance between the pair of push rods in the open and closed states of the stroller. be made tolerable.

Under such circumstances, in order to firmly maintain the open state of the baby carriage, it is sufficient to completely prevent the push rod connecting rod from rotating in this open state. That is, it is sufficient that the configuration is such that the movement of the push rod connecting rod in the rotational direction is locked when the baby carriage is in the open state.

Purpose of the invention Therefore, the main purpose of this invention is to provide a push rod and push rod connecting rod for a baby carriage, which is intended to achieve a lock against rotation of the push rod connecting rod as described above at the connecting portion between the push rod and the push rod connecting rod. The purpose of the present invention is to provide a connecting part structure.

Structure and Effects of the Invention The baby carriage has a left push rod and a right push rod, which are maintained at a predetermined distance from each other when the baby carriage is opened, and the distance from each other is narrowed when the baby carriage is closed. The left push rod and the right push rod are connected via a push rod connecting rod. Specifically, it includes a portion that is rotatable relative to the left and right push rods and is connected between the left and right push rods. Changing the distance between the left and right push rods in the open and closed states of the baby carriage is achieved by the above-mentioned rotational movement.
This invention is a connection structure between such a push rod and a push rod connecting rod.

The left push rod includes a rotatable left portion and a rightward portion provided integrally with the rotatable left portion. The rotatable left portion is rotatable around the left push rod axis in response to the above-described rotational movement. Further, the rightward portion is provided with a length such that it extends from the rotatable left portion toward the right push rod when the baby carriage is in the open state.

Similarly, the right push rod has a rotatable right portion that is rotatable around the right push rod axis in response to the above-mentioned rotational movement, and is integrated with this rotatable right portion, and when the baby carriage is open, and a leftward portion extending from the rotatable right portion toward the left push rod.

The push rod connecting rod has a left lock control section, a right lock control section, a left end connected to the left lock control section via a left rotation pin, and a right end connected to the right lock control section via the right rotation pin. and a central part connected to the parts. The left lock control section is supported by the right section in a rotatable manner around the axis of the right section, and the right lock control section is supported on the left section so as to be rotatable around the axis of the left section. be done. Further, the left lock control section and the central portion are relatively rotatable around the axis of the left rotation pin. Similarly, the right lock control and the central portion are relatively rotatable about the axis of the right pivot pin.

Thus, when the baby carriage is in the open state and the left and right push rod axes are not parallel to the left and right rotation pin axes, the left and right lock control sections are prohibited from rotating relative to the center portion. Thereby, rotation of the left and right rotatable parts about their respective push rod axes is prohibited.

Next, by rotating the left and right lock control parts around the axes of the rightward and leftward parts, respectively, when the left and right push rod axes and the left and right rotation pin axes become parallel, the left and right By rotating the lock control portions relative to the center portion, the left and right rotatable portions rotate about the left and right push rod axes, respectively. As a result, the distance between the left push rod and the right push rod is narrowed.

According to this invention, the parallel relationship between the left and right push rod axes and the axes of the left and right rotation pins can be adjusted simply by rotating the push rod connecting rod around its axis. It is possible to lock or release the lock against relative rotation. Therefore, the operation becomes very simple. Moreover, this push rod connecting rod is
The push rod is installed on a member that is relatively close to the hands of the person operating the baby carriage.
Such operations can be performed easily. If the rotational movement of the push rod connecting rod is locked, the mechanical structure from the push rod to the push rod connecting rod will be strong, so this part will resist the force pushing the baby carriage. No deformation occurs, and therefore the force pushing the baby carriage is effectively transmitted, allowing the baby carriage to be operated without any problem.
At the same time, accidents such as an accidental transition of the baby carriage from an open state to a closed state are also prevented.

Other features of the invention will become clearer from the following detailed description with reference to the drawings.

DESCRIPTION OF EMBODIMENTS FIG. 1 is a perspective view of a baby carriage in an open state to which an embodiment of this invention is applied. In the baby carriage shown here, a left push rod 1 is attached to a rear leg 2 via a support plate 3. Similarly, the right push rod 4 is also attached to the rear leg 2 via the support plate 3. The pair of rear legs 2 is rotatably connected to the front legs 5. A push rod connecting rod 6 is connected between the left push rod 1 and the right push rod 4. The push rod connecting rod 6 is one of the members extending in the width direction of this baby carriage, but other members extending in the width direction include a front leg connecting rod 7, a short connecting rod 8, a backrest connecting rod 9, etc. The push rod connecting rod 6, front leg connecting rod 7, short connecting rod 8, backrest connecting rod 9, etc., which extend in the width direction, respectively, extend in a straight line when the stroller is open, as shown in FIG. It's summery. However, in the closed state of the baby carriage, the front leg connecting rod 7, short connecting rod 8, backrest connecting rod 9, etc. are bent in a predetermined direction, and the push rod connecting rod 6 is bent in a predetermined direction, and the push rod connecting rod 6 is bent in the push rods 1 and 4. On the other hand, the central portion thereof is in a relatively rotated state. Therefore, the distance between the left push rod 1 and the right push rod 4, the distance between the pair of front legs 5,
The distance between the pair of rear legs 2 is narrowed when the baby carriage is in the closed state.

FIG. 2 is a perspective view of the main part of the embodiment of this invention seen from the front of the baby carriage, and shows the structure of the connecting portion between the right push rod 4 and the push rod connecting rod 6. FIG. 3 is a sectional view taken along the parallel line - of FIG. 2. This plane is parallel to the push rod axis 10 of the right push rod 4. The state shown in FIGS. 2 and 3 corresponds to a state in which relative rotation between the right push rod 4 and the push rod connecting rod 6 is locked.

The right push rod 4 has a rotatable right portion 11 that is rotatable around a right push rod axis 10, and is integrated with this rotatable right portion 11, and in the open state of the baby carriage shown in FIG. It includes a left-facing portion 12 provided to extend from the right-hand portion 11 toward the left push rod 1. The rotatable right part 11 is arranged to be rotatable about the push rod axis 10 relative to the main part 13 of the push rod connected to the rear leg 2. There are various possible ways to achieve this, one example of which is shown in FIG. That is, the main portion 13 of the push rod includes a right cylindrical member 14 having an inner circumferential surface corresponding to the outer circumferential surface of the rotatable right portion 11 . Rotatable right part 11
is rotatably received on the inner peripheral surface of this right cylinder member 14. Further, as shown in the figure, a guide hole 15 is formed in the right cylinder member 14, passing through it from its inner peripheral surface to its outer peripheral surface and extending in the circumferential direction. A positioning pin 16 is provided on the rotatable right part 11 and is adapted to be located in the guide hole 15 . The guide hole 15 and the positioning pin 16 preferably constitute a first positioning means. That is, the rotatable right portion 11 is connected to the positioning pin 16
is rotatable within the range in which it can move within the guide hole 15. Therefore, when the positioning pin 16 is in the starting position of the guide hole 15, as shown in FIG. 2, the baby carriage is in an open state. Then, the rotatable right portion 11 rotates clockwise around the push rod axis 10, that is, in the direction indicated by arrow A in FIG.
When reaching the terminal position 5, the baby carriage is in a closed state.

The push rod connecting rod 6 is rotatable around the axis 17 of the left portion 12 of the right push rod 4.
The right lock control section 18 supported by the left push rod 1
A left side lock control part 20 is supported by the right side part 19 in a rotatable state around the axis of the right side part 19 (FIG. 1), and the right side end is connected to the right side lock control part 20 via a right side rotation pin 21. 18, and a central portion 23 whose left end is connected to the left lock control section 20 via a left pivot pin 22 (FIG. 1). Right side lock control section 18 and center section 2
3 is relatively rotatable around the axis 24 of the right rotation pin 21. Similarly, the left lock control portion 20 and the central portion 23 are relatively rotatable about the axis 25 of the left pivot pin 22. The axis 24 and the axis 25 are in a parallel relationship.

As is clear from the above description, the push rod connecting rod 6, which is composed of the right lock control section 18, the center section 23, and the left lock control section 20, is rotatable around the axis 17 of the leftward section 12 and the rightward section 19. It is said that There are various possible ways to achieve this, one example of which is shown in the figure. That is, the right lock control section 18 has an inner circumferential surface that receives the leftward portion 12 of the right push rod 4 in a relatively rotatable manner. Similarly, the left lock control portion 20 has an inner circumferential surface that receives the rightward portion 19 of the left push rod 1 in a relatively rotatable manner. The push rod connecting rod 6 is thus rotatable about the axis 17 of the leftward portion 12 and the rightward portion 19 of the pushrod. This range of rotation is preferably defined by the second positioning means. That is, the right lock control section 18 is formed with an elongated hole that penetrates from the inner circumferential surface to the outer circumferential surface and extends in the circumferential direction. and,
The leftward portion 12 of the right push rod 4 is provided with an engagement pin 27 positioned within the elongated hole 26 . In this way, the right lock control section 18, that is, the push rod connecting rod 6, can rotate within the range in which the engagement pin 27 can move within the elongated hole 26.

In the state shown in FIG. 2, the engagement pin 27 is at the starting end position of the elongated hole 26. At this time, the axis 24 of the right rotation pin 21 connecting the right lock control section 18 and the center portion 23 and the push rod axis 10 of the right push rod 4
There is no parallel relationship. Preferably, in this state, the push rod axis 10 and the axis 24 of the right rotation pin 21 are
It is made to form a 90 degree angle. Next, when the push rod connecting rod 6 rotates around the axis 17 in the direction shown by arrow B in FIG. The axis 24 of the pin 21 and the push rod axis 10 are arranged in a parallel relationship.

In addition, in the above explanation, the structure related to the right push rod 4 and the structure related to the connection part structure between the right push rod 4 and the push rod connecting rod 6 were mainly described, but the same structure is the same as that for the left push rod 1 and the left push rod. 1 and the push rod connecting rod 6. just,
a first defining a range of rotation of the rotatable portion of the push rod;
The positioning means and the second positioning means for defining the range of rotation of the push rod connecting rod 6 do not necessarily need to be provided. This is because it is naturally defined by the first positioning means and the second positioning means provided for the right push rod 4. Furthermore, not only with respect to the left push rod 1 but also with respect to the right push rod 4, the first positioning means and the second positioning means may not be provided at all. This is because the rotation range of the rotatable portion and the rotation range of the push rod connecting rod can be kept within a predetermined range if the person rotating them is aware of this. Therefore, appropriate marks or scales may be displayed to facilitate keeping the rotation range within a predetermined range.

As clearly shown in FIGS. 2 and 3, the right lock control section 18 has a space defined by an inner peripheral surface having a U-shaped cross section. This allows the central portion 23 to rotate. This same configuration is used for the left side lock control section 20.
may be provided. Now, in the state shown in FIGS. 2 and 3, the center portion 23 is moved by the arrow C in FIG. Rotation in the directions shown is prohibited.

Focusing only on FIG. 3, the right lock control section 18 is rotatable about the axis 24 of the right rotation pin 21 in the direction shown by arrow D. However, as described above, in the state shown in FIGS. 2 and 3, the push rod axis 10 of the right push rod 4 and the axis 24 of the right rotation pin 21 are not in a parallel relationship. Further, the right push rod 4 is provided so that it can rotate around the push rod axis 10, but it cannot slide in a direction parallel to the push rod axis 10, for example, due to the positioning pin 16 and the guide hole 15. or by any other means. The same thing can be said about the configuration related to the left push rod 1. Therefore, when the baby carriage is in an open state and the left and right push rod axes 10 and the left and right rotation pin axes 25 and 24 are not parallel to each other as shown in FIGS. 1 to 3, the left and right locks Relative rotation of the control units 20 and 18 with respect to the central portion 23 is prohibited. As a result, the respective push rod axes 10 of the left and right rotatable parts 29, 11
Rotation around is prohibited. In this way, the open position of the baby carriage is locked. As described above, the push rod axis 10 and the axes 25, 24 of the left and right rotation pins preferably form an angle of 90 degrees in this state. In this way, relative rotation of the left and right lock control units 20, 18 with respect to the center portion 23 is reliably prohibited, and at the same time, the stroller is reliably locked in the open state.

Next, the operation and effect when releasing the locked state shown in FIGS. 1 to 3 will be explained.

From the state shown in FIG. 2, move the push rod connecting rod 6 around the axis 17 in the direction shown by the arrow
Rotate degrees. Then, the state shown in FIG. 4 is obtained. The state obtained here is a state in which the engagement pin 27 provided on the leftward portion 12 of the right push rod 4 is at the terminal position of the elongated hole 26 formed in the right lock control part 18, and the left and right The push rod axis 10 and the axes 25 and 24 of the left and right rotation pins are in a parallel relationship. Further, the opening portion of the U-shaped space formed in the lock control portions 18, 20 faces rearward, for example.

FIG. 5 is a sectional view taken along plane - of FIG. 4. This plane is orthogonal to the push rod axis 10. From the state shown, the push rod connecting rod 6
When the central portion 23 of the lock control section 20 is pushed in the direction shown by the arrow E, the left and right lock control sections 20, 18 are rotated around the pivot pin axes 25, 24, as shown in FIG. The left and right push rods 1 and 4 rotate around the push rod axis 10. central part 23
, the rotatable right portion 11 is pushed further in the direction of arrow E, as shown by the imaginary line in FIG.
The positioning pin 16 provided on the right cylinder member 14
The end position of the guide hole 15 formed in is reached, whereby the rotation of the rotatable right part 11 is stopped. At this time, preferably, the right lock control section 1
If the abutment surface 30 of the rotatable right portion 11 is brought into contact with the center portion 23, the rotation of the rotatable right portion 11 is reliably stopped. The above rotation is the same for the left push rod 1. In this way, as shown in FIG. 8, the distance between the left push bar 1 and the right push bar 4 is narrowed, and at the same time, other folding mechanisms also operate, resulting in the stroller being in the folded state shown in FIG. 9. is obtained.

FIGS. 10 to 12 are diagrams for explaining modifications of the second positioning means for defining the range of rotation of at least one of the left and right lock control sections. FIG. 10 is a view of the vicinity of the connecting portion between the rotatable right portion 11 of the right push rod and the push rod connecting rod 6, viewed from the rear, and FIG.
2 is a cross-sectional view taken along line X-X in the figure; FIG. FIG. 12 is a view similar to FIG. 10, except that in FIG. 10 the rotation of the rotatable right portion 11 is prohibited, whereas in FIG.
1 rotation is allowed.

As shown, the rotatable right portion 11 is formed with an elongated hole 31 extending in the circumferential direction, while the right lock control portion 18 is provided with an engagement pin 32 located within the elongated hole 31. ing. thus,
The push rod connecting rod 6 is rotatable within a range in which the engagement pin 32 can move within the elongated hole 31 . In the state shown in FIGS. 10 and 11, the right rotation pin 2 connecting the right lock control portion 18 and the center portion 23 is
1 and the push rod axis 10 of the right push rod 4 are not in a parallel relationship (preferably perpendicular relationship), rotation of the rotatable right portion 11 around the push rod axis 10 is prohibited. On the other hand, as shown in FIG.
If the push rod 6 is rotated so that the engagement pin 32 reaches the end position of the elongated hole 31, the axis 24 of the right rotation pin 21 and the axis 10 of the right push rod 4 become parallel. In this state, the rotatable right part 1
1 is in a state where it can rotate around the push rod axis 10.

The baby carriage shown in FIG. 9 is changed from the closed state to the open state, and in this open state, the push rods
The operation of the connecting portion between the push rod connecting rod 6 and the push rod connecting rod 6 until it is locked is exactly the opposite of the operation that leads to the closed state described above. Therefore, the explanation thereof will be omitted.

In the above description and in the illustrated embodiments,
The configuration was such that the stroller was brought into a closed state by pushing the push rod connecting rod in the forward direction of the stroller, but this may be changed depending on the type of stroller. Therefore, although not shown, the structure may be such that the stroller can be brought into a closed state by pulling the push rod connecting rod toward the rear of the stroller.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a baby carriage in an open state to which an embodiment of this invention is applied. FIG. 2 is a perspective view of the main parts of this embodiment as seen from the front of the baby carriage.
FIG. 3 is a sectional view taken along plane - of FIG. 2. FIG. 4 is a diagram corresponding to FIG. 2, and shows a state in which the lock is released. 5 to 7 are cross-sectional views taken along the plane - of FIG. 4, showing the operation of the baby carriage from the open state to the closed state. FIG. 8 is a perspective view showing a state in which the distance between the left push bar and the right push bar of the baby carriage is narrowed. FIG. 9 is a side view showing the baby carriage shown in FIG. 1 in a folded state. 10th
The figure is a rear view of the main parts of another embodiment of the invention, seen from the rear of the baby carriage. FIG. 11 is a cross-sectional view taken along line XX in FIG. 10. FIG. 12 is a diagram corresponding to FIG. 10, and shows a state in which the lock in the open state is released. In the figure, 1 is a left push rod, 4 is a right push rod, 6 is a push rod connecting rod, 10 is an axis of the push rod, 11 is a rotatable right part, 12 is a leftward part, 18 is a right lock control part,
19 is a rightward part, 20 is a left side lock control part, 21
is the right rotation pin, 22 is the left rotation pin, 23 is the center portion, 24 and 25 are the axis of the rotation pin, 29
indicates the rotatable left part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A left push bar and a right push bar that are maintained at a predetermined distance from each other when the baby carriage is in the open state, and the distance from each other is narrowed when the baby carriage is in the closed state, and said left and right push bars. The left and right push rods are connected to each other including a portion that can be rotated relative to the left and right push rods, and the rotation is configured to change the interval between the left and right push rods in the open state and the closed state, respectively. With a push rod connecting rod, achieved by the action
The connecting portion structure includes a rotatable left portion that is rotatable around an axis of the left push rod according to the rotational movement, and a rotatable left portion that is integrated with the rotatable left portion and that is connected to the open portion of the left push rod. and a rightward portion extending from the rotatable left portion toward the right push rod in the state, and the right push rod is rotatable around a right push rod axis in response to the rotational movement. a rotatable right portion, and a left-facing portion that is integrated with the rotatable right portion and extends from the rotatable right portion toward the left push rod in the open state; The push rod connecting rod includes: a left lock control portion supported by the rightward portion in a state where it can rotate around an axis of the rightward direction portion; a right-hand lock control section supported by the lock control section; The left lock control portion and the center portion are relatively rotatable around the axis of the left rotation pin, and the right lock control portion and the center portion are configured to be relatively rotatable around the axis of the left rotation pin. The portion is relatively rotatable around the axis of the right rotation pin, and in the open state, the left and right push rod axes are not parallel to the axis of the left and right rotation pins. When the left and right lock control portions are prohibited from rotating relative to the center portion, the left and right rotatable portions are prohibited from rotating about their respective push rod axes, and the left and right lock control portions are prohibited from rotating relative to the center portion. When the left and right push rod axes and the left and right rotation pin axes become parallel by rotating the parts around the axes of the rightward and leftward parts, respectively,
When the left and right lock control portions are respectively rotated relative to the center portion, the left and right rotatable portions are respectively rotated around the left and right push rod axes, thereby causing the left push rod and the right push rod to rotate. A connection structure between a push rod of a baby carriage and a push rod connecting rod, which narrows the distance between the push rod and the push rod. (2) A range of rotation of at least one of the left and right rotatable parts is defined by a first positioning means, and when the rotatable part is at a rotation starting position, the baby carriage is in an open state; The structure of a connecting portion between a push rod and a push rod connecting rod of a stroller according to claim 1, wherein the stroller is in a closed state when the rotatable portion is at the end position of rotation. (3) the left and right push rods each include left and right cylindrical members having inner circumferential surfaces; the rotatable left portion is rotatably received on the inner circumferential surface of the left cylindrical member; and the rotatable right portion is rotatably received on the inner peripheral surface of the right cylinder member, and at least one of the left and right cylinder members has a guide that penetrates from the inner peripheral surface to the outer peripheral surface and extends in the circumferential direction. a hole is formed, and at least one of the left and right rotatable parts is provided with a positioning pin positioned in the guide hole, and the guide hole and the positioning pin are connected to the first rotatable portion. A push rod and a push rod connecting rod for a baby carriage according to claim 2, wherein the rotatable portion is rotatable within a range in which the positioning pin can move within the guide hole. Connection structure with. (4) The range of rotation of at least one of the left and right lock control sections is defined by the second positioning means, and when the lock control section is at the starting end position of rotation, the rotation range of at least one of the left and right lock control sections is set to the axis of the left and right push rods. The axes of the left and right rotation pins are not parallel to each other, and the left and right push rod axes and the axes of the left and right rotation pins are parallel to each other when the lock control unit is at a rotation end position. A connection structure between a push rod and a push rod connecting rod of a baby carriage according to any one of claims 1 to 3. (5) At least one of the left and right lock control portions has an inner circumferential surface that rotatably receives the rightward portion or the leftward portion, and the lock control portion has an inner circumferential surface extending from the inner circumferential surface to an outer circumferential surface thereof. an elongated hole penetrating through and extending in the circumferential direction, and an engagement pin positioned in the elongated hole is provided in at least one of the rightward portion and the leftward portion. The elongated hole and the engagement pin constitute the second positioning means, and the lock control unit can rotate a range in which the engagement pin can move within the elongated hole. A connection structure between a push rod and a push rod connecting rod of the baby carriage according to item 4.