JP4489463B2 - stroller - Google Patents

Description

  The present invention relates to a foldable baby stroller.

  In general, various baby strollers that are used when taking infants outdoors for walks, shopping, and the like have been proposed so that they can be folded and stored and carried easily.

  However, in a stroller that can be folded so that the width is narrow, it is difficult to maintain rigidity because there are many pivot points, and the lateral balance of the car body occurs during running and the balance of the center of gravity collapses, making smooth running There are problems such as difficulty.

  In view of such a point, an object of the present invention is to obtain a stroller that can smoothly travel without causing lateral rolling of the vehicle body during traveling.

  The invention according to claim 1 is characterized in that, in a foldable baby stroller, a spacer that abuts on a side surface of the extension bag fixed to the handbag when the baby carriage is deployed is fixed to the rear leg provided with the rear wheel. To do.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the spacer is formed with a protrusion that contacts the side surface of the extension bag when the stroller is deployed.

  In the foldable baby stroller, since the spacer that abuts the side surface of the extension hook extending in the axial direction fixed to the hand pusher when the baby carriage is deployed is fixed to the rear leg provided with the rear wheel. At the time of deployment, the rear leg and the extension rod of the push rod are brought into pressure contact with each other via the spacer, so that the vehicle body is reliably prevented from rolling and smooth running can be performed.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a schematic configuration of a stroller according to the present invention, which includes a pair of left and right front legs 12 having a front wheel 11 having a twin-wheel structure and a pair of left and right rear legs 14 having a rear wheel 13 having a two-wheel structure. The stroller body is composed of the bent hand bar 15, the pair of left and right armrests 16, and the detachable guard arm 17 spanned between the armrests 16,16.

  A remote operation device 18 is provided at the center of the horizontal portion of the hand bar 15, and the right and left straight pipe portions 15 a of the hand bar 15 can swing in the approach direction around the remote operation device 18. . The rear ends of the armrests 16 are pivotally attached to the left and right straight pipe portions 15 a of the hand bar 15 by shafts 19. Is pivotally attached.

  A locking pin 20 that is operated to move in the axial direction of the straight tube portion 15a by operating the lever 18a of the remote control device 18 projects from the vicinity of the tip of the straight tube portion 15a of the hand bar 15. . A bracket 21 is pivotally attached to the front end portion of the straight pipe portion 15 a by a shaft 22, and a front end portion of the bracket 21 is pivotally attached to an intermediate portion of the rear leg 14 by a shaft 23. On the other hand, the other end of the bracket 21 is formed with a concave groove 21a in which the locking pin 20 is engaged and disengaged. Then, in the use state of the stroller as shown in FIG. 1, that is, in the unfolded state, the rear leg 14 is engaged with the distal end portion of the straight tube portion 15a of the hand bar 15, so that the position of the rear leg 14 is regulated. It is.

  An extension rod 24 extending in the axial direction is fixed to the front end portion of each of the right and left straight tube portions 15a of the hand push rod 15 on the inner surface of each straight tube portion 15a facing each other. A rear end portion of the frame 25 is pivotally attached to the intermediate portion by a shaft 26, and a front end portion of the frame 25 is pivotally attached to the front leg 12. As shown in FIG. 2, joints 27 are fixed to the vicinity of the front ends of the left and right frames 25, and both ends of the seat stay 28 are pivotally attached to the left and right joints 27 by shafts 27a. That is, the seat stay 28 includes a center seat stay 28a and left and right end seat stays 28b and 28b. The left and right end seat stays 28b and 28b are pivoted by shafts 29 at both ends of the center seat stay 28a. It is worn. As shown in FIG. 3, the seat stay 28 can be bent forward in a U shape by a shaft 27 a and a shaft 29.

On the other hand, the extension 24 provided at the distal end portion of the straight tube portion 15 a of the hand bar 15 and the seat stay 28 are connected by an X-shaped link 30. That is, the X-shaped link 30 is composed of two links 30a and 30a that are substantially pivoted at the center, and the rear end of each link 30a is fixed to the left and right extension rods 24, respectively. The joint 31 is pivotally attached by a shaft 31a. The distal ends of the links 30a and 30a are pivotally attached to bosses 28b ₁ and 28b ₁ provided on the left and right end seat stays 28b and 28b of the seat stay 28 by a shaft 32, respectively.

The left and right front legs 12 are connected by a front stay 33. That is, as shown in FIG. 4, the front stay 33 is composed of a central front stay 33a and left and right end front stays 33b, 33b, and end front stays 33b are provided at both ends of the central front stay 33a. The shaft 34 is pivotally attached to the joint 35 fixed to the front leg 12 by the shaft 35a. As shown in FIG. 5, the front stay 33 can also be bent upward in a substantially U shape by shafts 34 and 35a. Incidentally, the said end before the stay 33b are extended portion 33b ₁ is formed in the joint 35 toward the side, the lower end of the rod 36 is connected at a position eccentric relative to the shaft 35a of the extended portion 33b ₁ . The upper end of the rod 36 is connected to a rear position from a pivotal portion with the front leg of the frame 25.

  Further, the left and right rear legs 14 are connected to each other by a rear stay 40. That is, as shown in FIG. 6, the rear stay 40 is composed of a central rear stay 40a and left and right end rear stays 40b, 40b. A stay 40b is pivotally attached, and a tip portion of the end rear stay 40b is pivotally attached to a joint 42 fixed to the rear leg 14 by a shaft 43. As shown in FIG. 7, the rear stay 40 can be bent forward by shafts 41 and 43.

  By the way, the left and right end rear stays 40b, 40b are formed with a boss 44 on the joint 42 side, and one end of a rod 45 is connected to the boss 44. On the other hand, the bracket 21 is provided with an extension portion 21b extending from the pivot point to the rear leg 14 by the shaft 23, and the other end of the rod 45 is connected to the extension portion 21b by a point 46. Yes. Further, as shown in FIG. 8, a link bar 47 is extended in the center rear stay 40a, and both ends thereof are pivotally connected to the end rear stay 40b. That is, one end of the link bar 47 is connected to a position eccentric with respect to the shaft 41 of one end rear stay 40b, and the other end of the link bar 47 is connected to the shaft 41 of the other end rear stay 40b. It is connected to an eccentric position. In this case, both connecting points of the link bar 47 are provided on the opposite sides of the shaft 41 in the left and right end rear stays 40b, and one end rear stay 40b is connected to the center rear stay 40a. When bent, as shown in FIG. 9, the other end rear stay 40b is interlocked via the link bar 47 and operated in a direction to bend with respect to the central rear stay 40a.

Thus, when the stroller is folded from the unfolded state shown in FIG. 1, the locking pin 20 is pulled up by operating the lever 18a of the remote control device 18, and the engagement with the concave groove 21a of the bracket 21 is released. When the push bar 15 is pushed down while pulling forward, the bracket 21 rotates counterclockwise in FIG. 1 about the shaft 22, and the hand bar 15 moves to a lower position with respect to the rear leg 14. Therefore, the armrest 16 and the frame 25 swing upward about the shafts 19 and 26 pivotally attached to the straight pipe portion 15a of the hand bar 15 by the movement of the hand bar 15, so that the front leg 12 and the rear leg 14 move toward each other, and the dimensions of the stroller in the front-rear direction are reduced as shown in FIG. On the other hand, corresponding to the swinging of the frame 25, between the joint 31 to which the rear end portion of the X-shaped link 30 is pivotally attached and the joint 27 to which the left and right end seat stays 28b and 28b are pivotally attached. As the size increases, the X-shaped link 30 is actuated in the closing direction, whereby the seat stay 28 is bent in a U-shape forward as shown in FIG. Further, when the front leg 12 is lifted upward by swinging the frame 25 upward, the pivot point of the rod 36 pivoted on the frame 25 and the shaft 35a of the joint 35 secured to the front leg 12 are obtained. since the dimension between the smaller and the frame 25 is swung upwards, the ends acts downward force to the extended portion 33b ₁ of the front stay 33b through a rod 36, the end portion before the stay 33b is swung counterclockwise in FIG. 4 about the shaft 35a. Accordingly, as the left and right end front stays 33b rotate, the front stays 33 are also bent in a U-shape as shown in FIG.
On the other hand, as described above, when the stroller is folded from the unfolded state, when the push bar 15 is pushed down while being pulled forward, the bracket 21 rotates together with the rear leg 14 around the shaft 22 in the counterclockwise direction in FIG. However, in this case, as shown in FIG. 7, the bracket 21 is relatively moved with respect to the rear leg 14 with respect to the rear leg 14 about the shaft 23 that is pivotally attached to the rear leg 14 as the bracket 21 rotates. It is rotated counterclockwise. Accordingly, a pulling force acts on the left and right end rear stays 40b via the rods 45 pivotally attached to the extension portions 21b provided at the front end portions of the left and right brackets 21, respectively. And the rear stay 40 is bent in a U-shape as shown in FIG. In this case, as shown in FIG. 9, when one end rear stay 40 b is rotated about the shaft 43, the other end rear stay 40 b is also centered on the shaft 43 via the link bar 47. Since the rotational force works, the left and right end rear stays 40b rotate synchronously and can be folded reliably.

  In this way, the left and right front legs 12 and the straight pipe portion 25a of the hand bar 15 are moved in a direction approaching each other and the rear legs 14 are moved in a direction approaching each other. As shown in FIG. The direction dimension is reduced.

  On the other hand, in the case where the folded state is used for the use from the above folded state, the left and right armrests 16 and the frame 25 are shown in FIG. As shown in FIG. 2, the X-shaped link 30 is developed in the opening direction in the state shown in FIG. The end front stay 33b is rotated clockwise in FIG. 5 about the shaft 35a, and the front stay 33 is extended linearly as shown in FIG. On the other hand, when the stroller body is unfolded, the bracket 21 rotates clockwise about the shaft 23 in FIG. 40b is rotated about the shaft 43, and the rear stay 40 is also extended linearly as shown in FIG. In this manner, the left and right front legs 12 and the rear legs 14 move away from each other, and the front wheels 11 and the rear wheels 13 are separated from each other, resulting in a usable unfolded state as shown in FIG.

  By the way, when both ends of the rear stay 40 are pivotally attached to the rear leg 14 via the joint 42 as shown in the above embodiment, the mounting angle of the shaft 43 that pivotally attaches the rear stay 40 to the joint 42. By selecting appropriately, the inclination angle of the rear stay at the time of folding can be freely changed.

  In the above-described embodiment, the seat stay 28, the front stay 33, and the rear stay 40 are shown to be bendable in a U-shape, but each stay may be bendable at the center.

  By the way, as shown in FIG. 12, a spacer 50 is fixed to the rear leg 14 at a position above the shaft 23 that pivotally attaches the bracket 21 to a position facing the side surface of the extension rod 24 when the vehicle body is deployed. FIG. 13 is an enlarged view of the spacer 50 fixing portion. The spacer 50 is integrally provided with projections 50a and 50b at a position facing the side surface of the extension rod 24 and a position facing the bracket 21 on the opposite side. When the stroller body is unfolded, the protrusion 50a of the spacer 50 fixed to the rear leg 14 is pressed against the side surface of the extension rod 24 of the push bar 15 as shown in FIG. is there. On the other hand, the other protrusion 50b is inserted into a recess 21a formed in the bracket 21 when the stroller body is deployed.

  Thus, when the stroller is used, the protruding portion 50a of the spacer 50 is inserted between the side surface of the extension rod 24 of the hand bar 15 and the rear leg 14, and the protruding portion 50a is the side surface of the extension rod 24. Pressure contacted. Therefore, the lateral roll of the stroller body is prevented by the press contact of the protrusion 50a to the side surface of the extension rod 24.

The perspective view which shows the external appearance of the stroller of this invention. The elements on larger scale which show the unfolding state of a X-shaped link and a seat stay. The elements on larger scale which show the bending state of a X-shaped link and a seat stay. It is a figure which shows the connection state of a frame and a front stay, Comprising: The elements on larger scale which show the expansion | deployment state of a front stay. The elements on larger scale which show the bending state of a front stay. It is a figure which shows the connection state of a bracket and a rear stay, Comprising: The elements on larger scale which show the expansion | deployment state of a rear stay. The elements on larger scale which show the bending state of a back stay. The partial cross section front view of a rear stay. The partial cross section front view which shows the state which the back stay bent. The side view of the state which folded the stroller of this invention. The rear view of the state which folded the stroller of this invention. The partial view which shows the connection part of a back leg and a hand barb. The enlarged view of a spacer adhering part.

Explanation of symbols

11 front wheel 12 front leg 13 rear wheel 14 rear leg 15 push bar 16 armrest 18 remote control device 21 bracket 24 extension bar 25 frame 28 seat stay 28a center seat stay 28b end seat stay 30 X-shaped link 33 front stay 33a center front stay 33b End front stay 36 Rod 40 Rear stay 40a Center rear stay 40b End rear stay 45 Rod 47 Link bar 50 Spacer 50a Projection

Claims (1)

In a foldable stroller,
A spacer that is in contact with the side surface of the extension rod fixed to the handbag when the stroller is deployed is fixed to the rear leg provided with the rear wheel,
The extension rod extends in the axial direction of the push rod,
The spacer is arranged at a position facing the side surface of the extension bag when the stroller is deployed ,
The spacer is formed with a protrusion that contacts the side surface of the extension bag when the stroller is deployed,
The stroller is characterized in that the protruding portion is inserted between a side surface of the extension rod and the rear leg when the stroller is deployed .

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