JPH085385B2 - baby carriage - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a baby carriage, and more particularly to a mechanism for locking an open state and a closed state of a baby carriage.

[Prior Art] The basic structure of a baby carriage, which is the background of the present invention, is disclosed in JP-A-57-11168 and JP-A-57-182566 made by the same applicant as the present applicant. Has been done. More specifically, the baby carriages disclosed in these publications include a pair of rear legs extending rearward and downward, a pair of rolling brackets, and a pair of handrail support bars. Each of the pair of rolling brackets has its one end rotatably connected to the central portion of the pair of rear legs, so that the pair of rolling brackets rolls along the upper half or the lower half of the rear legs. It is provided freely. Further, the pair of handrail support rods extend in the vertical direction, rotatably connect the rear end portions of the pair of handrails each extending in the front-rear direction, and the lower ends of the pair of handrail support rods through the connecting shaft. Is rotatably connected to the other end. Then, in the open state of the stroller, the rolling bracket is located along the upper half of the rear leg, and the angle of the rolling bracket and the handrail support rod in the aligned state is fixed and the stroller is in the open state. Established. Further, when the stroller is closed, the rolling bracket is located along the lower half of the rear leg, and the rolling bracket and the handrail support rod are in a bent state.

The present invention is premised on a baby carriage having the basic structure as described above.

[Problems to be Solved by the Invention] In the baby carriage disclosed in the above-mentioned two publications, by rotating a pair of levers located on the left and right side portions of the baby carriage, the baby carriage can be opened and closed. The lock mechanism is being operated. Considering the ease of operation, it is more convenient to operate the lock mechanism at one place than at two places. Further, when considering the manufacturing cost and the manufacturing efficiency, it is difficult to adopt a structure for constructing the lock mechanism that is too complicated or has a large number of parts.

Therefore, the present invention can realize a mechanism for locking the open state and the closed state of the baby carriage with a simple structure and a small number of parts, and can operate the lock mechanism only at one place. The purpose is to provide.

[Means for Solving Problems] A baby carriage according to the present invention includes a pair of rear legs extending rearward and downward, a pair of rolling brackets, and a pair of handrail support bars. The pair of rolling brackets have one end rotatably connected at the center of the pair of rear legs,
As a result, it is provided so as to be rollable along the upper half of the rear leg or along the lower half. The pair of handrail support rods extend in the vertical direction, and rotatably connect the rear end portions of the pair of handrails extending in the front-rear direction, and the lower ends of the pair of handrail support rods via a connecting shaft. Is rotatably connected to the other end. In the opened state of the baby carriage, the rolling bracket is located along the upper half of the rear leg, and the angle of the rolling bracket and the handrail support rod in the aligned state is fixed to establish the opened state. . Further, when the stroller is closed, the rolling bracket is located along the lower half of the rear leg, and the rolling bracket and the handrail support rod are in a bent state.

The baby carriage having the above-mentioned configuration is characterized by the following.

The stroller extends by connecting a pair of handrail support rods, and is provided with an engaging shaft displaceable between an engaging position approaching the rolling bracket and a releasing position moving away from the rolling bracket. A spring that urges the engagement shaft to move to the engagement position. The rolling bracket includes a first locking recess that engages with the engagement shaft when the rolling bracket is located along the upper half of the rear leg, and an engagement when the rolling bracket is located along the lower half of the rear leg. A second engagement recess that engages with the mating shaft is formed. When the engagement shaft and the first locking recess are in the engaged state, the open state of the baby carriage is fixed. Further, when the engagement shaft and the second locking recess are in the engaged state, the closed state of the baby carriage is fixed.

The baby carriage further includes an engagement shaft operating means for displacing the engagement shaft against the force of the spring to the release position and stopping and holding the engagement shaft at the position.

[Advantageous Effects of the Invention] One engaging shaft extending between the pair of handrail support bars is one.
Since it engages with the locking recess of the pair of rolling brackets to lock the open and closed states of the baby carriage, the structure for realizing the lock mechanism is simple and can be realized with a small number of parts. be able to. Further, when the engagement shaft is moved to the release position by the engagement shaft operating means, the engagement state between the engagement shaft and the pair of rolling brackets is released. That is, the lock mechanism can be operated in only one place.

As described above, according to the present invention, the open state and closed state lock mechanism of the baby carriage can be realized with a simple structure and a small number of parts. Further, the lock mechanism can be operated in only one place.

[Embodiment] FIG. 1 is a side view showing an embodiment of the present invention.
The illustrated baby carriage has, as its basic frame, a pair of front legs 2 having a front wheel 1 at its lower end portion, a pair of rear legs 4 having a rear wheel 3 at its lower end portion, and extending in the front-rear direction to the front thereof. A pair of handrails 5 whose ends are rotatably connected to the upper ends of the rear legs 4 via shafts 8 and a rear end of the handrails 5 are rotatably connected to each other via shafts 9 extending vertically. A pair of handrail support bars 6
And a pair of seat support rods 7 extending in the front-rear direction and having front ends rotatably connected to the front legs 2 via shafts 10. The upper end of the front leg 2 is rotatably connected to the rear leg 4 via a shaft 11.

FIG. 2 is a side view showing a state in which the baby carriage shown in FIG. 1 is folded. As you can see from this figure,
When the folding operation of the baby carriage shown in FIG. 1 is started,
When the front leg 2 and the rear leg 4 rotate so as to approach each other, and the front wheel 1 and the rear wheel 3 are located at the same height in the folded state, the baby carriage in the folded state can be self-supporting.

In the illustrated embodiment, the handrail support rod 6 extends upward beyond the connecting portion with the handrail 5 and also serves as a push rod. The pair of handrail support bars 6 has a connecting sleeve 12 fixedly attached to the lower end thereof. The connecting sleeve 12 and the seat supporting rod 7 are linked through a connecting shaft 13, and a rolling bracket 14 and an operating lever 16 are located between the connecting sleeve 12 and the seat supporting rod 7.

FIG. 3 shows a side view of the structure of the portion related to the connecting sleeve 12. In this figure, for the sake of convenience, the rear leg 4 and the seat support rod 7 are shown by imaginary lines. This third
The figure shows the left side view of the baby carriage, but the arrangement of each member is, from the outside to the inside, the connecting sleeve 12, the rolling bracket 14, the operating lever 16, and the seat support rod 7.
The order is. The rear leg 4 and the connecting sleeve 12 are located in substantially the same plane. Although FIG. 3 shows the structure of the portion related to the left side surface of the baby carriage, the portion located on the right side surface of the baby carriage is the same as in FIG. Only the structure of the part related to the left side surface will be described.

One end of the rolling bracket 14 is rotatably connected to the center of the rear leg 4 via a shaft 15. When the stroller is in an open state as shown in FIGS. 1 and 3, the rolling bracket 14 is positioned along the upper half of the rear leg 4,
On the other hand, when the baby carriage is in the folded state as shown in FIG. 2, the rolling bracket 14 is located along the lower half of the rear leg 4. In addition, connecting sleeve 12, rolling bracket
14, the operating lever 16 and the seat support rod 7 are connected to each other via a connecting shaft 13 so as to be rotatable relative to each other. When the stroller is open, the rolling bracket 14
Is located along the upper half of the rear leg 4, and the angle of the rolling bracket 14 and the handrail support rod 6 in the aligned state is fixed, and the opened state of the baby carriage is locked. In the closed state of the baby carriage, the rolling bracket 14 is located along the lower half of the rear leg 4, the rolling bracket 4 and the handrail support rod 6 are fixed in a bent state, and the baby carriage is closed. Is locked.

4 to 6 show the connecting sleeve 12 fixedly attached to the lower end portion of the handrail support rod 6. The through hole indicated by reference numeral 17 in the drawing is for inserting the connecting shaft 13. Further, as shown in the figure, a cylindrical portion 19 is formed on the side surface of the connecting sleeve 17 facing inward, and the through hole is formed.
17 penetrates through this cylindrical portion 19. Furthermore, the upper end portion of the connecting sleeve 12 has a through hole 18 extending in the width direction of the baby carriage.
Are formed. Further, the bottom surface of the connecting sleeve 12 has an inverted U-shaped cross section as shown in the drawing, and the inverted U-shaped portion holds the upper surface of the rear leg 4 when the baby carriage is open. It becomes a posture.

FIG. 7 shows the structure of the portion related to the pair of connecting sleeves 12 located on the left and right. Although a rolling bracket 14, an operating lever 16 and the like are present between the pair of connecting sleeves 12, these elements are not shown in FIG. 7. A connecting shaft 13, which connects the connecting sleeve 12, the rolling bracket 14, the operating lever 16, and the seat support rod 7 to each other in a rotatable manner, extends between a pair of connecting sleeves 12 located on the left and right. Further, as shown in the drawing, one engagement shaft 21 is arranged between the pair of connecting sleeves 12 so as to connect them. The engagement shaft 21 is bent so that both ends thereof are L-shaped, and the tip end of the bending is located in the through hole 18 of the connecting sleeve 12. In this way, the engagement shaft 21 can rotate about the axis 22 passing through the through hole 18 of the connecting sleeve 12. Specifically, the engagement shaft 21 is provided so as to be displaceable between an engagement position that approaches the rolling bracket 14 and a release position that moves away from the rolling bracket 14. Then, the connecting shaft 13 and the engaging shaft 21
A tension spring 23 is provided so as to connect with. The tension spring 23 biases the engagement shaft 21 so as to always move it to the engagement position.

8 and 9 show the rolling bracket 14. The lower end of the rolling bracket 14 is shown in FIGS.
A through hole 20 for inserting the shaft 15 shown in the drawing is formed. Further, a cylindrical portion 24 is formed on the upper portion of the rolling bracket 14. The cylindrical portion 24 receives the cylindrical portion 19 of the connecting sleeve 12 therein in a rotatable manner. Further, as shown in the figure, the rolling bracket 14 is formed with a first locking recess 25 and a second locking recess 26. First
As shown in FIG. 3 and FIG. 3, the rolling bracket 14 is attached to the rear leg 4
The first locking recess 25 engages with the engagement shaft 21 when positioned along the upper half of the. On the other hand, when the baby carriage is folded and the rolling bracket 14 is located along the lower half of the rear leg 4 as shown in FIG. 2, the second locking recess 26 engages with the engagement shaft 21.

The operating lever 16 is shown in FIGS. 10 and 11. A cylindrical portion 27 is formed substantially at the center of the operating lever 16. This cylindrical portion 27 is the cylindrical portion 19 of the connecting sleeve 12.
Is rotatably received inside. Also, the operating lever
A projecting portion 28 is formed in the center portion of 16. This protrusion
By contacting the rolling brackets 14 adjacent to each other, 28 restrains the operation lever 16 from moving randomly. Further, on the outer surface of the operating lever 16, two engaging bearing receiving recesses are formed.
29,30 are formed. These engaging bearing recesses 29, 30
Is for receiving the engagement shaft 21 and stopping and holding the engagement shaft 21 at the release position.

Next, the operation of the baby carriage from the open state to the normal state and the operation from the closed state to the open state will be described with reference to FIGS. 12 to 17. In these figures, only the rolling bracket 14 and the operating lever 16 are shown by solid lines, and the rear leg 4 and the handrail support rod 6 are shown by imaginary lines.

First, in the state shown in FIG. 12, the engagement shaft 21 is engaged with the first locking recess 25 of the rolling bracket 14. This engaged state is firmly maintained by the spring 23. This way the engagement shaft
When 21 and the first locking recess 25 are in the engaged state, the angle of the rolling bracket 14 and the handrail support rod 6 in the aligned state is fixed, and the opened state of the baby carriage is locked.

Next, when the baby carriage is to be closed, the operation lever 16 is operated so as to rotate counterclockwise in FIG. Then, as the operation lever 16 rotates counterclockwise, the engagement shaft 21 moves upward against the force of the spring 23, and the engagement state with the first locking recess 25 is released.
This state is the state shown in FIG. As is clear from this figure, the engaging shaft 21 is the engaging bearing receiving recess of the operating lever 16.
Received within 30 and held stationary in this position. First
In the state shown in FIG. 13, the upper portion of the handrail support rod 6 is set to the first position.
In the figure, if a forward movement operation is performed, the lower end portion of the handrail support rod 6, that is, the connecting shaft 13 moves rearward. The state in the middle of the movement is shown in FIG.

When the operation further proceeds from the state shown in FIG. 14, the handrail support rod 6 and the rear leg 4 are aligned substantially parallel to each other. With this operation, the engagement shaft 21 moves on the outer surface of the operation lever 16, and finally comes to be located in the second locking recess 26 of the rolling bracket 14. This state is the state shown in FIG.

In the state shown in FIG. 15, the engagement state between the second locking recess 26 of the rolling bracket 14 and the engagement shaft 21 is firmly maintained by the spring 23. That is, the bending state of the rolling bracket 14 and the handrail support rod 6 is fixed, and the closed state of the baby carriage is locked. The folded state shown in FIG. 2 corresponds to the state shown in FIG.

Next, when the stroller is to be moved from the closed state to the open state, the operation lever 16 is operated so as to rotate clockwise in FIG. Then, the engagement shaft 21 moves upward with the clockwise rotation of the operation lever 16 and releases the engagement state with the second locking recess 26. This state is
This is the state shown in FIG. As shown, the engagement shaft 21 is
It is received in the engaging bearing receiving recess 29 of the operating lever 16 and is stopped and held at that position. In the state shown in FIG. 16, since the bending state of the rolling bracket 14 and the handrail support rod 6 is not fixed, if the stroller is operated to open, the rear leg 4 and the handrail support rod 6 are separated from each other. Move to. The state in the middle of this movement is the state shown in FIG. When the operation further proceeds from the state shown in FIG. 17, the engagement shaft 21 comes off from the engagement bearing receiving recess 29 of the operating lever 16 and finally fits into the first locking recess 25 of the rolling bracket 14. Get stuck. The state is the state shown in FIG. 12, and the baby carriage is locked in the open state.

As described above, in the present invention, the engagement shaft 21 extending so as to connect between the pair of handrail support rods 6 and the locking recesses of the pair of rolling brackets 14 are engaged with each other. Since the stroller locks the open state and the closed state of the stroller, the structure for the lock mechanism is simple and the number of parts is small. Further, since unlocking the locked state of the baby carriage in the open state and the closed state can be achieved by rotating one operating lever, the operation is very simple.

It should be noted that the embodiment shown in FIGS. 1 to 17 is not limited to an embodiment of the present invention. Therefore, various modifications and variations are possible within the scope of equivalents of the present invention. For example, in the illustrated embodiment, the engaging shaft 21 moves in a circular arc to displace, but it may move in a linear motion to displace. Further, in the illustrated embodiment, the operating lever 16 is used as the engaging shaft operating means for displacing the engaging shaft against the force of the spring and displacing it to its release position and stopping and holding the engaging shaft at that position. However, various other forms are conceivable instead of such a form of the turning lever.

[Brief description of drawings]

FIG. 1 is a view of an embodiment of the present invention as viewed from the left side surface thereof. FIG. 2 is a diagram showing a folded state of the baby carriage shown in FIG. FIG. 3 is a view showing a structure related to a connecting portion between the handrail support rod 6 and the seat support rod 7 shown in FIG. FIG. 4 is a view showing the connecting sleeve 12 shown in FIG. 3 alone. FIG. 5 is a plan view of the connecting sleeve 12 of FIG. FIG. 6 is a right side view of the connecting sleeve 12 of FIG. FIG. 7 is a perspective view showing a pair of connecting sleeves 12 positioned on the left and right, and a connecting shaft 13 and an engaging shaft 21 connected between them. FIG. 8 is a view showing the rolling bracket 14 shown in FIG. FIG. 9 is a sectional view taken along the line IX-IX in FIG. FIG. 10 is a view showing the operation lever 16 shown in FIG. FIG. 11 is a right side view of the operation lever 16 of FIG. 12 to 17 show the rolling bracket 14 and the operation lever 16
FIG. 6 is a diagram showing a structure related to the engagement shaft 21. FIG. 12 shows a state where the baby carriage is locked in the open state, FIG. 13 shows a state after the operation lever 16 is rotated counterclockwise from the state shown in FIG. 12, and FIG. FIG. 15 shows the state after the handrail support rod 6 is moved from the state shown in the figure, and FIG. 15 shows the state when the baby carriage is locked in the closed state. Also,
FIG. 16 shows the state shown in FIG. 15 after the operating lever 16 has been rotated clockwise, and FIG. 17 shows the state shown in FIG. 16 in which the rear leg 4 and the handrail support rod 6 are separated from each other. The state after the movement is shown. In the figure, 2 is a front leg, 4 is a rear leg, 5 is a handrail, 6 is a handrail support rod, 7 is a seat support rod, 13 is a connecting shaft, 14 is a rolling bracket, 16 is an operating lever, 21 is an engaging shaft, Reference numeral 23 is a spring, 25 is a first engaging recess, 26 is a second engaging recess, and 29 and 30 are engaging bearing receiving recesses.

Claims (4)

[Claims] 1. A pair of rear legs extending rearward and downward, and one end of each of the pair of rear legs being rotatably connected at a central portion of the pair of rear legs, whereby along the upper half of the rear legs, Or it is provided so that it can roll along the lower half 1
A pair of rolling brackets and a pair of handrails extending in the up-down direction, each of which extends in the front-rear direction, rotatably connect the rear ends of the pair of handrails, and the lower end of the pair of rolling brackets is connected to the other end of the rolling bracket via the connecting shaft. A pair of handrail support rods rotatably connected to the ends, and the rolling bracket is located along the upper half of the rear leg when the baby carriage is in an open state. The angle between the stroller and the handrail support rod is fixed to establish the open state of the stroller, and when the stroller is closed, the rolling bracket is located along the lower half of the rear leg. In a baby carriage in which the rolling bracket and the handrail support rod are in a bent state, the pair of handrail support rods are connected to each other to extend, and an engagement position approaching the rolling bracket and a release away from the rolling bracket are provided. Displaceable between positions And a spring for urging the engagement shaft to move the engagement shaft to the engagement position. A first locking recess that engages with the engagement shaft when positioned along the half, and a second locking recess that engages with the engagement shaft when positioned along the lower half of the rear leg. Is formed, the open state of the baby carriage is fixed when the engagement shaft and the first locking recess are engaged, and the engagement shaft and the second locking recess are engaged with each other. When in the state, the closed state of the stroller is fixed, and the stroller further displaces the engaging shaft against the force of the spring to the release position, and at that position, the engaging shaft. Baby carriage provided with an engaging shaft operating means for stopping and holding the. 2. The baby carriage according to claim 1, wherein the engagement shaft operating means is a lever rotatably provided on one of the handrail support rods. 3. The lever has a plurality of engaging bearing receiving recesses for receiving the engaging shaft and stopping and holding the engaging shaft at the releasing position. The baby carriage according to item 2. 4. The connecting shaft extends between the pair of handrail support rods, the spring is a tension spring, one end of which is connected to the engaging shaft, and the other end of which is connected to the connecting shaft. The baby carriage according to any one of claims 1 to 3, which is provided.