KR20020075298A - Stroller - Google Patents

Abstract

PURPOSE: To provide a stroller allowing a wheel only on a front side in the direction of advance to turn around a vertical line axial line in any case of a back face manual pushing condition and a facing manual pushing condition. CONSTITUTION: Lock members 47a, 47b slidable vertically are provided in side parts of caster holders fixed to lower parts of a front leg 12 and a rear leg 14, respectively. Recessed parts 45a, 45b with which the lock members are selectively engaged when a front wheel 11 or a rear wheel 13 faces the direction of straight advance are provided in a caster shaft. Lead wires 50a, 50b whose both end parts are connected with the lock members on a front leg side and a rear leg side, respectively, and which are inserted into the front leg and the rear leg are engaged with the recessed parts 45a, 45b provided in the caster shaft selectively corresponding to the lock members 47a, 47b on the front wheel side or the rear wheel side by connecting the lead wires inserted into the front leg and the rear leg with a lock change-over operation member 54 mounted slidably on the front leg and a connection device 51 movable vertically together with the lock change-over operation member 54 in the front leg and the slide of the lock change-over operation member 54.

Description

Stroller {STROLLER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a baby carriage, and more particularly, to a baby carriage that enables switching of the face and rear hand push levers.

In general, a baby stroller used to take an infant outdoors for a walk, shopping, or the like, can be folded and stored and carried easily as needed, and the hand push lever is pushed from the rear of the infant. It has been proposed in various ways to put the hand push lever into a face state where the user pushes the hand push lever to a hand push state in which the user faces the infant.

However, in a baby carriage, in general, the front wheel can be rotated around the vertical axis to improve the driving operability. Therefore, the back hand which makes the hand push lever into the hand push state from the back of the infant as described above. When the user pushes the handwheel into a hand-pushed state in which the user faces the infant from the pushed state, the wheel on the rear side of the traveling direction can rotate around the vertical axis, and steering may be impaired. There is a problem such as not being performed smoothly. Therefore, although both the front wheel and the rear wheel can be rotated around the vertical axis, there is a problem such that the straight running of the stroller becomes difficult.

In view of the above, an object of the present invention is to obtain a baby carriage in which only the wheel on the front side of the traveling direction can be rotated around the vertical axis even when the hand push lever is in either the back hand push state or the face hand push state. It is done.

1 is a perspective view showing a schematic configuration of a baby carriage of the present invention.

Figure 2 is a side view of the stroller.

3 is an enlarged side view of the connection portion between the pipe and the hind legs;

Fig. 4 is a partial perspective view showing the configuration of the lock fixing member and the lock release member of the hand push lever.

5 is an explanatory view of the rocking operation of the hand push lever.

Fig. 6 is a side view of the baby carriage swinging with the hand push lever in a facing state.

7A is an enlarged cross-sectional view of the caster holder of the front wheel.

Fig. 7B is an enlarged cross sectional view of the caster holder of the rear wheel.

Fig. 8A is a view showing the back push state of the lock switching operation member.

Fig. 8B is a diagram showing a state of facing push of the lock switching operation member.

Fig. 9A is a view showing the locked state of the front wheel in the facing push state.

Fig. 9B is a view showing the lock release state of the rear wheel in the face push state;

Fig. 10 is a sectional view of the caster holder showing another embodiment of the present invention.

FIG. 11 is an operation explanatory diagram of the caster holder shown in FIG. 10; FIG.

* Description of the main parts of the drawing

10... stroller

11. Front wheel

12... forelegs

13. Rear wheel

14. Hind legs

45a, 45b... Recess

47a, 47b... Rock member

50a, 50b... Lead wire

54. Lock shift operation member

The present invention provides a stroller body having a pair of front legs each provided with a front wheel, a pair of rear legs each provided with a rear wheel, and a hand push lever which is swinged with respect to the stroller main body and is adapted to take the infant's facing side and the infant's back side. And a caster holder provided on each front leg and each rear leg, the caster holder having a built-in lock member, and a caster holder provided on each front wheel and each rear wheel and slidingly moving inside the caster holder and locking the member to lock. And a lock, a lock switching operation mechanism for operating the shaft, a lock member in the caster holder of the front leg, and a lock member in the caster holder of the rear leg, wherein the lock switching operation mechanism is operated in conjunction with the hand push lever.

When the hand push lever comes to the rear side of an infant, the lock switching operation mechanism is operated to release the lock member in the caster holder of each front wheel from the lock engaging portion of the caster shaft, and at the same time, the lock member in the caster holder of each rear wheel. Lock to the lock engaging portion of the caster shaft, and when the hand push lever comes to the infant's facing side, the lock switching operation mechanism is operated to lock the lock member in the caster holder of each front wheel to the lock engaging portion of the caster shaft, The lock member in the caster holder of the rear wheel is released from the lock engaging portion of the caster shaft.

The lock switching operation mechanism of the present invention is provided between a caster holder provided on one front leg and a caster holder provided on one rear leg, and a lead wire connecting the lock members in these caster holders to the other front leg. It is a baby carriage provided between the caster holder provided and the caster holder provided in the other rear leg, and having the lead wire which connects the lock members in these caster holders.

The present invention is a baby carriage characterized in that the lead wire is a lead wire on the front wheel side and a lead wire on the rear wheel side connected to the lead wire on the front wheel side via a coupling mechanism.

The baby carriage according to the present invention is characterized in that the switching operation member is connected to the coupling mechanism.

The baby carriage according to the present invention is characterized in that the switching operation member has a projection via the projection, and the hand push lever has a projection that abuts on the projection of the switching operation member.

This invention is a baby carriage characterized in that the lead wire is pressed to one side by a spring for the lead wire.

This invention is a baby carriage characterized in that the lock member in the caster holder is always pressed to the lock engagement portion side by a spring for the lock member.

The lock engaging portion of the caster shaft is a baby carriage characterized by comprising a concave portion to which the lock member locks.

The present invention is characterized in that the caster shaft is provided with a retractable positioning pin, and the caster holder is formed with a concave groove for locking the front wheel or the rear wheel by locking the positioning pin when the caster shaft is lowered. It is a baby carriage.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described with reference to an accompanying drawing.

1 is a perspective view showing a schematic configuration of a baby carriage of the present invention, and FIG. 2 is a side view thereof. The stroller 10 includes a pair of left and right front legs 12 having a front wheel 11, a pair of left and right rear legs 14 having a rear wheel 13, a hand push lever 15 curved in a substantially U shape, A pair of left and right armrests 16 and two left and right pipes 17 extending in parallel to each other, one end of which is pivotally fixed, are provided.

The front leg 12 is pivotally fixed to the other end of each said armrest 16, and the arc-shaped bendable guide arm 18 is detachably spanned between the front-end | tip parts of the left and right armrests 16. FIG. In addition, the upper end of the rear leg 14 is pivotally fixed to the left and right armrests 16. The left and right front legs 12 are connected by a front connecting bar 20 having a lift plate 19, and the left and right rear legs 14 are connected by a rear connecting bar 21. In addition, the front end of the connecting bar 22 is pivotally fixed to the middle portion of each front leg 12, and the rear end of the connecting bar 22 is attached to the rear leg supporting member 23 fixed to the lower part of the pipe 17, respectively. The pivot is fixed. The left and right connecting bars 22 are connected by an upper connecting bar 24. Among these, the main body of the baby carriage 10a is constituted by the front legs 12, the rear legs 14, the armrests 16, the pipes 17, and the connection bars 20, 21, 22, and 24 connecting them. The hand push lever 15 is swingable with respect to the baby carriage main body 10a.

As enlarged especially in FIG. 3, the lower end part of the L-shaped bracket 25 is pivotally fixed to the rear leg 14, The middle part is pivotally fixed to the said rear leg support member 23. As shown in FIG. At the free end of the bracket 25, there is provided a notch step 25a for locking with the lock fixing step 26a of the lock member 26 for locking the rear leg 14 to the pipe 17. The lock member 26 is slidably mounted to the pipe 17, and is configured to slide up and down along the pipe 17 by a remote control device provided on the hand push lever. In addition, the rear leg support member 23 is provided with a stepped portion 23a that abuts the rear leg 14 at the time of deployment and holds the deployed state on a surface facing the rear leg 14.

Thus, as shown in FIG. 3, when the lock member 26 is locked to the notch step 25a of the L-shaped bracket 25, the rear leg 14 and the pipe 17 are passed through the bracket 25. ) Is held and held in a deployed state in which the baby carriage body can be used. On the other hand, when the lock member 26 is raised by the remote control device provided in the hand push lever as indicated by the dashed-dotted line, the lock by the lock member 26 is released, and the armrest 16 and the front leg 12 ( As shown by the dashed-dotted line, the rear leg 14 can be swung upward and can be folded into two for convenience of carrying and the like.

However, as shown in Fig. 1, the lower end portion of the U-shaped hand push lever 15 is attached to the rear side supporting member 23 fixed to the lower portion of the pipe 17 on the left and right sides thereof, and the shaft 27 It is pivotally fixed to the center so that it can swing back and forth. Moreover, the lock fixing protrusions 28 and 29 which protrude in the transverse direction to the front end part and the rear end part are provided in the outer surface of the armrest 16. On the other hand, a lock fixing member 30 which locks to the lock fixing projections 28 or 29 is mounted to the hand push lever 15 so as to be slidable along the hand push lever 15 (Figs. 4 and Fig. 4). 5) The lock fixing member 30 is pressed downward through the spring 34.

On the other hand, as shown in Fig. 5, the lock fixing member 30 has an L-shape having an open portion 31a extending upward and downward on the surface side facing the pipe 17 and opening backward in the lower end portion. The 1st recessed part 31 for lock fixing is provided, and the 2nd lock fixing recessed part 32 which extends upward and downward and opens forward and downward below the 1st recessed part 31 is provided. ) Is installed.

However, when the lock fixing member 30 is raised upward and the hand push lever 15 swings backward by the remote control device provided in the hand push lever, as shown in Fig. 5, the rear of the first concave portion 31 is shown. The lock fixing protrusion 29 is inserted into the first concave portion 31 via the opening portion 31a to the lower portion, and the lock fixing protrusion 29 is moved by moving downward of the lock fixing member 30. 1 is locked to the recess 31. As a result, as shown in Fig. 2, the hand push lever 15 is fixed to the rear swing position, i.e., the back push state. Meanwhile, as shown by the broken line in Fig. 5, the lock fixing member 30 is raised upward. When the hand push lever 15 swings forward, the second lock fixing recess 32 is locked to the lock fixing projection 28, and moves to the lower side of the lock fixing member 30 in FIG. As shown, the hand push lever 15 is fixed to the front swing position, that is, the facing push state.

As shown in Fig. 4, the lock release member 33, which is operated by the remote control device below the lock fixing member 30, can slide on the hand push lever 15 along the hand push lever 15. Is fitted. The lock release member 33 is pushed downward by a spring 34 provided in the hand push lever 15, and the lock release lever 35 protrudes outward. On the other hand, when the operation plate 36 protruding upward of the lock release lever 35 protrudes from the lock member 26, and the lock release lever 35 is raised upward together with the lock release member 33, The lock member 26 is raised upward through the operating plate 36, and the lock of the bracket 25 is released, so that the baby carriage can be folded as described above.

7A and 7B are enlarged views of the front wheel part and the rear wheel part of the baby carriage in the present invention, and caster holders 40a and 40b are fixed to the lower ends of the front leg 12 and the rear leg 14 of the baby carriage, respectively. In the lower half of the caster holders 40a and 40b, vertical portions in the vertical direction are bent, and in the vertical portions of the caster holders 40a and 40b, circumferential cavities 41a and 41b in which bottom surfaces are opened are formed. It is. In the cavities 41a and 41b, caster shafts 43a and 43b protruding from the caster main bodies 42a and 42b which axially support the front wheels 11 or 13 by horizontal shafts 11a and 13a on one side thereof are caster holders. It is attached rotatably around the axis of 40a, 40b. Step portions 44a and 44b, which contact the lower edges of the caster holders 40a and 40b, are formed at the lower portions of the caster shafts 43a and 43b of the caster main bodies 42a and 42b, respectively. 44b) are formed with recesses 45a and 45b to which the lock fixing member described later locks when the front wheel 11 or the rear wheel 13 faces the straight direction.

On the other hand, lock member accommodating portions 46a and 46b extending in the vertical direction are formed on opposite sides of the caster holder 40a on the front wheel side and the caster holder 40b on the rear wheel side, and the lock member accommodating portion ( The locking members 47a and 47b are provided in 46a and 46b so that up-and-down sliding is possible. The lock members 47a and 47b are connected to the springs (springs for the lock members) 48a and 48b, respectively, and are pressed downward by the springs 48a and 48b.

One end of the lead wires 50a and 50b is connected to the lock members 47a and 47b, respectively, and the lead wire 50a connected to the lock member 47a on the front wheel side is inserted into the front leg 12. Similarly, the lead wire 50b connected to the lock member 47b on the rear wheel side is inserted into the rear leg 13, and the other end of the lead wire 50b is inside the armrest 16 as shown in FIG. It is inserted into the front leg 12 via the inside, and is connected to each other by the connecting mechanism 51 (FIG. 8) in the front leg 12 to the lead wire 50a of the front wheel side.

8A and 8B are enlarged cross-sectional views showing details of the connecting portion of the lead wire 50a and the lead wire 50b, and ends of the lead wire 50a and the lead wire 50b are mounted in the front leg 12. The connected coupling mechanism 51 is arrange | positioned so that sliding along the front leg 12 is possible. That is, as shown to FIG. 8A, the coupling mechanism guide member 53 arrange | positioned in the front leg 12 is attached to the pivot shaft 52 which pivotally fixes the top end of the front leg 12 to the armrest 16, In the elongated groove 53a formed in the coupling mechanism guide member 53, the coupling mechanism 51 can slide along the elongated groove 53a. Further, the lock switching operation member 54 is engaged with the front leg 12 so as to be slidably movable, and the coupling mechanism 51 and the lock are locked by the shaft 55 inserted into the long groove 12a of the front leg 12. The switching operation member 54 is connected. The coupling mechanism 51 is pressed upward by a spring (spring for lead wire) 56 provided between the coupling mechanism guide member 53. A projection 54a protruding outward is integrally provided on the lock switching operation member 54, and a projection 57 provided on the hand push lever 15 when the hand push lever 15 is swung forward. 8B abuts against the projection 54a, and the coupling mechanism 51 moves downward against the spring 56 via the lock switching operation member 54. As shown in FIG.

Thus, in the case of the back hand push state in which the hand push lever 15 is tilted backwards as shown in Fig. 2 and comes to the back side of the infant B, as shown in Fig. 7A, the lead wire 50a is made by the spring 56. The lock member 47a is lifted upward through the above, and the lock of the caster main body 42a at the front wheel 11 is released. Therefore, the rotation around the vertical axis of the front wheel 11 is free. On the other hand, as shown in FIG. 7B, the lock member 47b on the rear wheel 13 side is moved downward by the spring 48b at this time, and the recessed part of the caster shaft 43b of the caster main body 42b on the rear wheel side is moved. Lock to 45b. Therefore, the caster main body 42b of the rear wheel 13 is locked so that rotation about the vertical axis of the rear wheel 13 is prevented. In this way, in the case of the state of the back push, only the front wheel 11 can be turned, and the steering of the baby carriage can be made free.

In addition, when the hand push lever 15 swings forward as shown in Fig. 6 to the face push state coming to the face side of the infant B, the protrusion 57 provided on the hand push lever 15 locks the operation member 54. The lock switching operation member 54 is pushed downward in contact with the projection 54a of (). Therefore, the lock member 47a is pressed downward by the spring 48a, and as shown in Fig. 9A, the lock member 47a is locked to the recess 45a of the caster main body 42a, and the caster main body ( 42a) is locked. On the other hand, at this time, the lock member 47b on the rear wheel 13 side is lifted upward by the lead wire 850b, and as shown in Fig. 9B, the lock with the recess 45b is released. Therefore, the caster main body 42b of the rear wheel 13, which is the forward direction forward side, can be rotated around the vertical axis, and the caster main body 42a of the front wheel 11, which is the backward direction forward direction, is locked.

In this way, only in the case of the back push or the face push state, only the wheel on the front side of the traveling direction can be turned, and the wheel on the back side is locked so that the steering can be performed even in the back push or the face push state. Can make it good.

FIG. 10 is a view showing a modification of the present invention, wherein the caster holder 40a fixed to the lower end portion of the front leg 12 is formed with a circumferential cavity 60 having an open lower end surface, and the cavity 60 thereof. The caster shaft 43a which axially supported the front wheel 11 by the horizontal shaft 11a in one side part is rotatably mounted around the axis line, and is slidably movable along the inner surface of the cavity 60 inside. .

The upper outer surface of the caster shaft 43a is provided with a recess 61 extending in the circumferential direction, and within the recess 61 a regulating pin 62 extending in the horizontal direction provided in the caster holder 40a. ) Is inserted, and the sliding range of the caster shaft 43a in the vertical direction is regulated by the locking engagement between the upper and lower stepped portions of the concave portion and the restricting pin 62. The caster shaft 43a is provided with a front wheel straight position fixing pin 63 that can retreat in the radial direction of the caster shaft 43a, and is provided by a spring 64 mounted in the caster shaft 43a. It is pressed to protrude outward.

On the other hand, when the caster shaft 43a is in a downward position together with the front wheel 11 on the lower inner surface of the cavity 60 of the caster holder 40a, and the front wheel 11 faces the straight direction, the front wheel position is fixed. The recessed groove 65 to which the pin 63 locks is provided. The recessed groove 65 extends in the axial direction, and an inclination toward the inner surface side of the cavity 60 of the caster holder 40a is formed at the upper end of the recessed groove 65.

In this way, since the front wheel 11 is grounded at the time of use of a baby carriage, the front leg 12 is moving downward, ie, the caster shaft 43a is located in the upper position relative to the caster holder 40a. Therefore, as shown in FIG. 10, the front wheel positioning pin 63 abuts on the inner surface of the cavity 60, and is rotatable along the inner surface thereof.

On the other hand, when the front wheel 11 is picked up by the hand push lever at the time of folding the baby carriage, the front wheel 11 is lowered with respect to the caster holder 40a together with the caster shaft 43a by the weight of the front wheel 11. do. Therefore, when the front wheel 11 swings in the straight direction and is directed in the straight state, as shown in FIG. 11, the front wheel straight position positioning pin 63 protrudes by the spring 64 and locks to the concave groove 65. The front wheel 11 is fixed in a state in which the straight direction is directed. Therefore, when the baby carriage is folded, the front wheel supported by the caster shaft 43a is prevented from being forcibly folded in a state other than the straight position.

Since the present invention has been configured as described above, the lock member provided on the side of the front leg or the rear leg via the lead wire inserted into the front leg and the rear leg by moving the lock switching operation member mounted on the front leg so as to be slidably upward or downward. It can be selectively locked to a recess provided in the caster shaft. For this reason, even when the baby carriage is in the back hand push state or the face hand push state, only the wheel on the front side in the traveling direction can be rotated around the vertical axis. Therefore, steering performance at the time of driving | running | working of a baby carriage can always be maintained in a good state, and smooth running can be made. Moreover, the lead wire inserted in the front leg and the rear leg was connected to the connection mechanism arrange | positioned in a front leg, and the connection mechanism was made to move by the lock switching operation member. In this way, since the connecting portion between the lead wire and the lock switching operation member is in the front leg, and the lock switching device is only mounted so as to be slidably movable with respect to the front leg, the appearance is good and the number of malfunctions is reduced.

Claims (10)

A baby carriage body having a pair of front legs each provided with a front wheel, a pair of rear legs each provided with a rear wheel, A hand push lever which swings about the baby carriage body and is installed to take the infant's facing side and the infant's back side, The caster holder which is installed in each front leg and each rear leg, and built a lock member, A caster shaft provided on each front wheel and each rear wheel and having a lock coupling portion to which the lock member locks while slidingly moving in the caster holder; And a lock switching operation mechanism for operating the lock member in the caster holder of the front leg and the lock member in the caster holder of the rear leg, A baby carriage, characterized in that the lock changeover operation mechanism works in conjunction with the hand push lever. The method of claim 1, When the hand push lever comes to the rear side of the infant, the lock switching operation mechanism is operated to release the lock member in the caster holder of each front wheel from the lock engagement portion of the caster shaft, and at the same time, the lock member in the caster holder of each rear wheel is removed from the caster shaft. Lock to the lock joint, When the hand push lever comes to the infant's facing side, the lock switching operation mechanism is operated to lock the lock member in the caster holder of each front wheel to the lock engagement portion of the caster shaft, and lock the lock member in the caster holder of each rear wheel to the caster shaft lock. Stroller, characterized in that released from the coupling portion. The method of claim 1, The lock switching operation mechanism is provided between the caster holder provided on one front leg and the caster holder provided on one rear leg, and the lead wire which connects the lock members in these caster holders, A baby carriage provided between a caster holder provided on the other front leg and a caster holder provided on the other rear leg, and having a lead wire connecting the lock members in these caster holders. The method of claim 3, A lead wire is made of a lead wire on the front wheel side and a lead wire on the rear wheel side connected to the lead wire on the front wheel side via a coupling mechanism. The method of claim 4, wherein A baby carriage, characterized in that the switching operation member is connected to the coupling mechanism. The method of claim 5, A baby carriage characterized in that the switch operating member is provided with a protrusion, and the hand push lever has a protrusion that abuts on the protrusion of the switch operating member. The method of claim 6, A lead wire is pushed to one side by a spring for a lead wire. The method of claim 1, The lock member in the caster holder is always pressed to the lock engagement portion side by the spring for the lock member. The method of claim 1, The lock engaging portion of the caster shaft comprises a concave portion to which the lock member locks. The method of claim 1, The caster shaft is provided with a position fixing pin so as to be able to move forward and backward, and the caster holder is formed with a concave groove for locking the front wheel or the rear wheel by locking the position fixing pin when the caster shaft is lowered.