JP4472384B2 - 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 three-fold type stroller that is folded in a so-called U shape so that it can be folded so that the width of the stroller is narrow, once 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 folded forward further, many operations are required during the folding operation, which is not easy to use, and the stay that connects the left and right legs is directly linked to the mechanism for opening and closing the stroller body. Because the stay does not extend when the stroller body is opened and closed, and there is no locking mechanism for the foldable stay, the stay that is connected by the play of the parts will be activated when the car body is deployed. There is a problem that the vehicle body becomes unstable and it is difficult to maintain rigidity in an empty state.
JP 2001-391137 A

  An object of the present invention is to provide a stroller in which a stay that connects left and right legs is always folded or unfolded in conjunction with the opening / closing operation of a vehicle body.

The present invention relates to a pushcart 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 approach each other, and the hand push The seat stay that connects the left and right frames with the rear end pivotally attached to the heel and the front end 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. At the same time, the frame and the front stay are linked together by a rod, and a lock member that can be attached to and detached from the other stay is slidable in the longitudinal direction on one stay that is foldably connected to the other stay. The wire rope connected to the lock member is fixed to the joint side where the one stay is pivotally attached to the front leg, and the lock operation is pivotally attached to the joint. One end of the bar, and connecting the lower end of the rod connected to the frame by swinging of the lock lever to actuate the locking member in the unlocking direction via the wire rope, the locking member is a locking direction The wire rope is engaged with a locking piece provided at the other end of the lock operation lever .

The present invention, on Kigakaritomehen is characterized by being engaged in the elongated hole of the arc formed in one of the stay above about the pivot axis of the lock operation member.

The present invention, before the stay is you characterized by being pivotally attached to the front leg through the joint.

  The present invention relates to a hand barb bent in an inverted U-shape, a seat stay that connects left and right frames pivotally attached to the hand bar and rear end pivotally attached to a front leg, and front stays that connect left and right front legs. And the rear stay that connects the left and right rear legs can be bent, and the frame and the front stay are interlocked and connected by a rod, so that the frame can be shaken simply by operating the stroller body in the half-folded state. The front stay is folded via the rod by movement, the width of the stroller body can be reduced, and the front stay opens according to the operation from the double folded state to the deployed state at the time of use, The width of the stroller can be set to a normal use state, and the stroller can be folded or unfolded easily and reliably. Therefore, there is an effect that it is possible to always ensure rigidity even when the vehicle is empty. Further, when a lock mechanism is provided on the front stay, the rigidity of the vehicle body can be further ensured.

  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, 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 upper end 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 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 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-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.

  FIGS. 12 to 14 show other embodiments of the present invention. The front stay 50 is composed of a left stay 50a and a right stay 50b, and both stays 50a and 50b are bent with respect to each other by a shaft 51. Connected as possible. A lock member 51 that can be engaged with and disengaged from the other stay 50a is slidably mounted in one of the stays 50a and 50b, for example, the right stay 50b, in the longitudinal direction. A wire rope 52 inserted through 50b is connected, and the tip of the wire rope 52 is fixed to the joint 35. The lock member 51 is urged in the lock direction by a spring 53. On the other hand, an intermediate portion of the lock operation lever 54 is pivotally attached to the outside of the joint 35 by a shaft 55, and a lower end of the rod 36 connected to the frame is connected to one end portion of the lock operation lever 54. It is connected. A locking piece 56 projects from the other end of the lock operating lever 54. The locking piece 56 is formed in the right stay 50b and passes through an arc-shaped elongated hole 57 around the shaft 55 to the right. The wire rope 52 is supported by the locking piece 56 inserted into the stay 50b.

  Thus, when the rod 36 is pushed down as described above when the stroller is folded, the lock operating member 54 is swung around the shaft 55 by the rod 36. Accordingly, the wire rope 52 is lifted upward by the locking piece 56 provided on the lock operation member 54, a pulling force acts on the wire rope 52, the lock member 51 is pulled against the spring 53, and the left The lock with the stay 50a is released. Therefore, when the rod 36 further moves downward, the locking piece 56 of the lock operating member 53 comes into contact with the end of the long hole 57 of the right stay 50b, and the right stay 50a is centered on the shaft 35a via the locking piece 56. As shown in FIG. 14, it is swung upward and folded.

  On the contrary, when the stroller is deployed, when the front stay 50 becomes linear, the lock member 51 is returned to the initial position by the spring 53 and engaged with the left stay 50a, and the left and right stays are automatically locked. Moreover, since the lock member 51 and the wire rope 52 are disposed in the stay 50b, they are not exposed to the outside and the appearance is not impaired.

  By the way, when both ends of the front stay 33 are pivotally attached to the front leg 12 via the joint 35 as shown in the above embodiment, the mounting angle of the shaft 35a for pivotally attaching the front stay 33 to the joint 35 is set. By selecting appropriately, the inclination angle of the front stay at the time of folding can be freely changed.

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 figure which shows other embodiment of the front stay part in this invention. FIG. 14 is a partial cross-sectional view of FIG. 13. FIG. 14 is a partial cross-sectional view showing a bent state of the front stay in FIG. 13.

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 Front stay 50a Left stay 50b Right stay 51 Lock member 52 Wire rope 54 Lock operation lever 56 Locking piece

Claims (3)

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, a push bar bent in an inverted U shape, and the rear end 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. The frame and front stay are linked and connected by a rod.
A lock member that can be engaged with and disengaged from the other stay is slidably attached to one of the stays that are foldably connected to each other in the front stay, and the tip of the wire rope that is connected to the lock member is connected to the one stay. The stay of the rod is fixed to the joint that is pivotally attached to the front leg, and the lower end of the rod that is connected to the frame is connected to one end of the lock operating lever that is pivotally attached to the joint. By operating the lock member in the unlocking direction via the wire rope , the lock member is biased in the lock direction, and the wire rope is engaged with the locking piece provided at the other end of the lock operation lever. stroller, characterized in that is. The locking piece is characterized by being engaged in the elongated hole of the arc formed in one of the stay above about the pivot axis of the locking lever, stroller according to claim 1. The stroller according to claim 1 or 2 , wherein the front stay is pivotally attached to the front leg via a joint.

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