JP2005247218A - Stroller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stroller having a seat stay always folded or made into an unfolded state by interlocking with an opening/closing operation of a vehicle body. <P>SOLUTION: In this stroller, front legs 12 having front wheels 12 at lower end parts and rear legs 14 having rear wheels at the lower ends are made foldable in a two-folded state to mutually approach the front legs 12 and the rear legs 14. Each of a hand lever 15 bent into a reverse U-shape, the seat stay 28 for connecting left and right frames 25 having rear ends pivotally attached to the hand lever 15 and front ends pivotally attached to the front legs 12, a front stay 33 for connecting the left and right front legs 12 and a rear stay 40 for connecting the left and right rear legs 14 is made bendable. The hand lever 15 and the seat stay 28 are connected by X-shaped links 30 having center parts pivotally attached to each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

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 tri-fold type stroller that is folded in a so-called U shape so as to be folded so that the width of the stroller becomes narrow, after the front leg and the rear leg are folded in a double-folded state in which they are substantially parallel to each other Since the left and right parts are further folded forward, many operations are required during the folding operation, which is not easy to use, and the mechanism is not directly linked to the opening and closing of the stroller body. Therefore, the seat stay does not extend when the stroller body is opened and closed, the vehicle body becomes unstable, and it may be difficult to maintain rigidity in an empty state. In addition, there are problems that it is necessary to manually push down the seat stay in order to obtain a normal use state when the vehicle is empty.
JP 2001-391137 A

  An object of the present invention is to obtain a stroller in which a seat stay is always folded or unfolded in conjunction with the opening / closing operation of a vehicle body.

  The invention according to claim 1 is a stroller that is bent in an inverted U shape in a stroller that can be folded in a double-folded state in which a front leg having a front wheel at the lower end and a rear leg having a rear wheel at the lower end are close to each other.シ ー ト, a seat stay that connects the left and right frames with the rear end pivotally attached to the push bar and the front end pivotally attached to the front leg, a front stay that connects the left and right front legs, and a rear stay that connects the left and right rear legs, respectively In addition to being able to bend, the push bar and the seat stay are connected to each other by an X-shaped link whose central portions are pivotally attached to each other.

  The invention according to claim 2 is the invention according to claim 1, wherein the rear end portion of the X-shaped link is pivotally attached to the left and right extension rods of the hand push rod, and the front end portion of the X-shaped link is the seat It is characterized by being pivotally attached to the vicinity of both ends of the stay.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the seat stay is composed of a center seat stay and end seat stays pivotally attached to both ends of the center seat state. The front end portion of the X-shaped link is pivotally attached to the end seat stay.

  The invention according to claim 4 is characterized in that, in the invention according to any one of claims 1 to 3, the rear end portions of the left and right frames are pivotally attached to the intermediate portion of the extension rod of the hand barb. To do.

  The present invention relates to a hand barge, a seat stay that connects left and right frames pivotally attached to the hand bar and the front end pivotally connected to the front leg, a front stay that connects the left and right front legs, and a left and right rear leg Each of the stays can be bent, and the push bar and the seat stay are connected to each other by an X-shaped link pivoted at the center, so that the stroller body is simply operated in the folded state. The X-shaped link can be actuated in the closing direction to reduce the width of the stroller body, and the X-shaped link can be reduced by simply performing the operation from the half-folded state to the unfolded state during use. This opens the link so that the width of the stroller can be set to normal use. In addition, the seat stay is folded or unfolded in conjunction with the opening and closing of the X-shaped link, and the stroller can be folded or unfolded easily and reliably. A normal deployment state can always be achieved without performing the above operation. Therefore, there is an effect that it is possible to always ensure rigidity even when the vehicle is empty.

  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 baby stroller according to the present invention. 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, and the top ends of the front legs 12 and the rear legs 14 are respectively provided in the middle portions of the left and right armrests 16. 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, is pivotally mounted the lower end of the rod 36 is at a position eccentric relative to the shaft 35a of the extended portion 33b ₁ Yes. The tip of the rod 36 is pivotally attached to 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 pivotally attached 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 pivotally attached to the extension portion 21b by a point 46. ing. 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 pivotally attached 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 pivotally attached to an eccentric position. In this case, both pivot attachment 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 with respect to the central rear stay 40a. 9, the other end rear stay 40b is operated via the link bar 47 in the direction of bending with respect to the central rear stay 40a as shown in FIG.

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 rotated counterclockwise in FIG. 4 about the shaft 35a. Accordingly, as the left and right end front stays 33b swing, 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 around 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 ends of the left and right brackets 21, respectively. And the rear stay 40 is bent in a U-shape around the shaft 41 as shown in FIG. In this case, as shown in FIG. 9, when one end rear stay 40 b is rotated about the shaft 41, the other end rear stay 40 b is also centered on the shaft 41 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.

  In the above embodiment, the seat stay 28, the front stay 33, and the rear stay 40 are shown to be foldable into a U-shape. However, the central portions of the stays are pivotally attached to each other at the central portion. It may be bendable.

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.

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

Claims (4)

  In a stroller that can be folded in a folded state in which a front leg having a front wheel at the lower end and a rear leg having a rear wheel at the lower end are close to each other, a push bar bent in an inverted U shape, The seat stay that connects the left and right frames that are pivotally attached and the front end is pivotally attached to the front leg, the front stay that connects the left and right front legs, and the rear stay that connects the left and right rear legs can be bent, respectively. A stroller characterized in that the lower part of the handbag and the seat stay are connected by an X-shaped link whose central part is pivotally attached to each other.   A rear end portion of the X-shaped link is pivotally attached to the left and right extension rods of the hand push rod, and a front end portion of the X-shaped link is pivotally mounted in the vicinity of both ends of the seat stay. The stroller according to claim 1.   The seat stay is composed of a center seat stay and end seat stays pivotally attached to both ends of the center seat stay. The seat stay can be folded forward in a U-shape, and the end seat stay has an X-shape. The stroller according to claim 1 or 2, wherein a front end portion of the link is pivotally attached. The stroller according to any one of claims 1 to 3, wherein rear end portions of the left and right frames are pivotally attached to an intermediate portion of the extension rod of the hand push rod.

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