HK1105395B - Hand rod of baby buggy - Google Patents

Description

Hand push rod of baby carriage

Technical Field

The present invention relates to a hand push bar for a stroller, and more particularly, to a hand push bar for a stroller that can improve the operability of a remote operation device and can be reduced in weight.

Background

In general, in a stroller used when a baby is taken outdoors for walking, shopping, or the like, a stroller has been developed which can be folded, stored, and carried as needed.

Fig. 23 is a partially cutaway perspective view showing a schematic configuration of the stroller. As shown in fig. 23, the stroller body includes a pair of left and right front legs 12 having front wheels 11, a pair of left and right rear legs 14 having rear wheels 13, a hand push bar 15 bent in a substantially U-shape, a pair of left and right armrests 16, and a pair of left and right 2 side vertical pipes 17 pivotally attached to one ends of the armrests 16 and extending in parallel to each other.

The front end of the front leg 12 is pivotally attached to the front portion of each armrest 16, and an arc-shaped flexible guard arm 18 is detachably mounted between the front end portions of the armrests 16. Further, the distal end portions of the left and right rear legs 14 are also pivotally attached to the intermediate portions of the armrests 16, and one end of a bracket 19 bent in a dogleg shape is pivotally attached to the intermediate portions of the rear legs 14. Further, the brackets 19 are pivotally mounted at intermediate positions to the lower end portions of the side vertical pipes 17, respectively. In the deployed state of the stroller, the lock member 20 slidably attached to the side vertical tube 17 is engaged with an engagement portion formed at the other end of the bracket 19, and the deployed state is maintained.

On the other hand, the left and right front legs 12 are connected by a front leg connecting stay 22 having a footrest 21, and the left and right rear legs 14 are connected by a rear leg connecting stay 23. Further, the front end of the side frame 24 is pivotally attached to the intermediate portion of each front leg 12, and the rear end of the side frame 24 is pivotally attached to the front end of the side vertical pipe 17 together with the bracket 19 and the lower end portion of the hand push lever 15. The intermediate portions of the left and right side frames 24 are connected by upper connection stays 25 extending in the left-right direction.

Then, the stroller is held in a usable unfolded state by engaging the lock member 20 provided at the lower end of the side vertical tube 17 with the locking portion provided at the upper end of the bracket 19. On the other hand, if the locking member 20 is disengaged from the bracket 19 by operating the operating device 26 provided on the hand push rod 15, the armrest 16 and the side frame 24 can be swung upward about the respective pivot attachment points with respect to the side vertical pipes 17. As a result, the front legs 12 and the rear legs 14 are swung to be substantially parallel to each other, and can be folded into a 2-fold state for convenient carrying.

The bottom seat 27 having a seat plate portion and a back rest portion is attached to the stroller body formed as described above. That is, the bottom seat 27 has its seat plate portion 27a attached to the upper connecting stay 25, and the left and right side portions of the back contact portion 27b attached to the upper portions of the left and right side vertical pipes 17 with respect to the pivot attachment points of the armrests 16. A baby seat (not shown) made of sewn products is mounted on the bottom seat 27 as needed, and the baby carriage is moved by the baby seated or lying on the baby seat.

In the above-described stroller, the stroller may be transported in a folded state or carried while being carried around a step or the like, and therefore, weight reduction is one of the problems.

Conventionally, as shown in fig. 24(a) and 24(b), a hand push bar 15 of a stroller includes a pair of side pipes 67 and a U-shaped pipe 68 disposed between the pair of side pipes 67. A remote operation device is provided on the U-shaped tube 68, and wires (wires) 69 connected to lock releasing members provided on the respective side tubes are connected to the remote operation device. Each side tube 67 is provided with one joint 61 having one external gear 71 and a wire guide path 90, and the U-shaped tube 68 is provided with the other joint 65 having the other external gear 83 and the wire guide path 90 and rotatable with respect to the corresponding one joint 61. Further, an internal gear 63 that detachably engages the one external gear 71 of the one joint 61 and the other external gear 83 of the other joint 65 is provided between the one joint 61 and the other joint 65.

Here, the wire 69 is disposed in the wire guide path 60 provided outside the internal gear 63 so as not to be wound around the internal gear 63 when the U-shaped tube 68 is bent with respect to each side tube 67. Therefore, in the case where the U-shaped tube 68 is linearly arranged with respect to the side tube 67 (see fig. 24 a), and in the case where the U-shaped tube 68 is bent with respect to the side tube 67 (see fig. 24 b), it is necessary to change the length of the wire 69 arranged in the wire guide path 60. Therefore, the wire 69 is rotated in advance to form the loop 59, thereby forming a backlash.

However, if such a ring 59 is formed in advance, an unnecessary resistance acts when the remote operation device is operated, which causes deterioration of operability. Further, since the wire 69 is heavy, if the wire 69 is rotated to form the loop 59, the stroller becomes heavy by this amount.

In many cases, the member that operates the lock member 20 and the like by the remote device at hand is composed of an inner slide member that is located inside a pipe such as a hand push bar and moves in conjunction with the inner slide member, and an outer slide member that moves in conjunction with the inner slide member. In addition, the outer slide member is often formed in a tubular shape, and the stroller is heavy. That is, although the outer slide member does not necessarily need to be cylindrical as long as it follows the inner slide member, many of the outer slide members are generally formed in a cylindrical shape, and there is room for improvement in consideration of weight reduction.

Disclosure of Invention

The present invention has been made in view of such a problem, and an object thereof is to provide a hand push bar for a stroller which is lightweight.

The present invention is a handle bar for a stroller, comprising: a pair of side tubes; a U-shaped pipe disposed between the pair of side pipes; the remote operation device is arranged on the U-shaped pipe; a wire provided in the remote operation device and connected to the lock releasing member provided in each of the side pipes; a square joint provided on each side tube and having a square external gear and a wire guide path; a second joint provided on the U-shaped pipe, having a second external gear and a wire guide path, and rotatable with respect to the corresponding first joint; an internal gear provided between the one joint and the other joint and detachably engaged with the one external gear of the one joint and the other external gear of the other joint; the guide member is provided between the first joint and the second joint and adjacent to the internal gear, and has a wire guide shaft for guiding the wire to the vicinity of the rotation center of the second joint.

The invention provides a hand push rod of a baby carriage, which is characterized in that a guide member is provided with a holding plate for holding a wire guide shaft and a guide projection arranged on the holding plate and used for guiding a wire.

The invention provides a hand push rod of a baby carriage, which is characterized in that a guide protrusion of a guide component forms a space on the side of a U-shaped pipe, and a notch for holding a metal wire is formed on the side of a side pipe.

The invention provides a push rod of a baby carriage, which is characterized in that a button for releasing the engagement between an external gear and an internal gear of the other side joint is arranged on the other side joint.

The invention relates to a hand push rod of a baby carriage, which is characterized in that an opening groove for opening a metal wire is arranged on a holding plate of a guide component.

The invention relates to a hand push rod of a baby carriage, which is characterized in that a spring is arranged between an internal gear and a square joint; a spring fixing shaft for supporting and fixing the spring from the inside is provided on one of the joints.

The present invention is a handle bar for a stroller, comprising: a pair of side tubes; a U-shaped pipe disposed between the pair of side pipes; the remote operation device is arranged on the U-shaped pipe; a wire provided in the remote operation device and connected to the lock releasing member provided in each of the side pipes; a square joint provided on each side tube and having a square external gear and a wire guide path; a second joint provided on the U-shaped pipe, having a second external gear and a wire guide path, and rotatable with respect to the corresponding first joint; an internal gear provided between the one joint and the other joint and detachably engaged with the one external gear of the one joint and the other external gear of the other joint; one of the one joint and the other joint has a wire guide shaft for guiding a wire to the vicinity of the rotation center of the other joint.

The invention is a hand push rod of a baby carriage, which is characterized in that one of a joint and the other joint is provided with a joint main body provided with a metal guide shaft; the joint body has a notch extending in the rotational direction of the other joint.

The invention is a hand push rod of a baby carriage, which is characterized in that a joint cover which covers a notch extending along the rotation direction of the other joint and can freely rotate in the rotation direction of the other joint is arranged on a joint main body; the joint cover has a wire guide hole through which the wire passes.

The invention provides a push rod of a baby carriage, which is characterized in that a button for releasing the engagement between an external gear and an internal gear of the other side joint is arranged on the other side joint.

The invention relates to a hand push rod of a baby carriage, which is characterized in that a spring is arranged between an inner gear and a metal wire guide shaft; a convex part for supporting the spring is arranged on the side of the wire guide shaft.

The invention provides a push rod of a baby carriage, which is characterized in that a button is provided with a protrusion part which is abutted with an internal gear and a protrusion rod which is arranged on the protrusion part and penetrates through the internal gear.

The present invention is a handle bar for a stroller, comprising: a pair of side tubes having long holes extending in the axial direction on the side surfaces; a U-shaped pipe disposed between the pair of side pipes; a guide member which is inserted and fixed in at least one of the side pipes and extends in the axial direction of the side pipe; an inner slide member mounted slidably in the axial direction along the guide member in the side tube; a spring stretched between the guide member and the inner slide member, and biasing the inner slide member to an initial position with respect to the guide member; and a plate-shaped outer sliding member provided on an outer surface of the side tube, connected to the inner sliding member via the elongated hole of the side tube, and slidably attached to the outer surface of the side tube along a longitudinal direction of the elongated hole of the side tube.

The present invention is a handle bar for a stroller, further comprising: the remote operation device is arranged on the U-shaped pipe; a wire provided on the remote operation device and coupled to the inner slide member; by operating the wire with the remote operation device, the outer slide member slides relative to the outer surface of the side tube along the longitudinal direction of the long hole of the side tube via the inner slide member.

The present invention is a handle bar for a stroller, characterized in that an outer slide member is manually slidably attached to an outer surface of a side tube.

The invention provides a push rod of a baby carriage, which is characterized in that outer sliding components are connected by a connecting component.

The invention provides a push rod of a baby carriage, which is characterized in that an external sliding component is a locking releasing component for releasing locking when the baby carriage is folded into a 2-fold state.

The present invention is a push rod for a stroller, wherein the outer sliding member is an engaging member for holding the push rod in a state of being pushed to the opposite side or in a state of being pushed to the back side.

The invention provides a push rod of a baby carriage, which is characterized in that a protruding part protruding towards the horizontal direction is arranged on the outer surface of the inner side of an outer sliding component.

The invention provides a hand push rod of a baby carriage, which is characterized in that a base part which is slidably clamped in a long hole of a side pipe is arranged on the outer surface of an outer side sliding component.

According to the present invention, the length of the wire provided between the remote operation device and the lock release member is shortened, or the outer slide member that follows the inner slide member is formed in a plate shape, whereby a lightweight push rod for a stroller can be provided.

Drawings

Fig. 1 is a perspective view showing a schematic structure of a hand push stick incorporating the present invention.

Fig. 2 is a longitudinal sectional side view of the stroller.

Fig. 3 is an enlarged side view of the back support frame and the side plate.

Fig. 4 is a plan view of the back support portion support frame and the headrest portion.

Fig. 5 is an explanatory view of the operation of the back support portion support frame and the headrest portion.

Fig. 6 is an explanatory view of the operation of the back support frame and the headrest when folded.

Fig. 7 is a plan view of one joint, a spring, an internal gear, a guide member, the other joint, and a push button before assembly according to embodiment 1, as viewed from the direction a in fig. 1.

Fig. 8 is a plan view of the first joint, the spring, the internal gear, the guide member, the second joint, and the push button of embodiment 1 before assembly, as viewed from the direction B in fig. 1.

Fig. 9 is a side sectional view of one joint, a spring, an internal gear, a guide member, the other joint, and a push button before assembly in embodiment 1.

Fig. 10 is a structural diagram of one joint of embodiment 1.

Fig. 11 is a structural diagram of an internal gear of embodiment 1.

Fig. 12 is a structural diagram of a guide member according to embodiment 1.

Fig. 13 is a structural diagram of the other joint of embodiment 1.

Fig. 14 is a side sectional view of the assembled one joint, spring, internal gear, guide member, other joint, and push button of embodiment 1.

Fig. 15 is a configuration diagram showing a relationship between a guide member and a wire according to embodiment 1.

Fig. 16 is a schematic plan view of one joint, a spring, an internal gear, a guide member, the other joint, and a push button according to embodiment 2 before assembly.

Fig. 17 is a side sectional view of the first joint, the spring, the internal gear, the guide member, the second joint, and the push button according to embodiment 2 before assembly.

Fig. 18 is a schematic plan view showing the relationship between the joint body, the joint cover, and the wire according to embodiment 2.

Fig. 19 is a side sectional view of the assembled one joint, spring, internal gear, guide member, other joint, and push button of embodiment 2.

Fig. 20 is a schematic plan view showing the relationship between the joint body, the joint cover, and the wire according to embodiment 2.

Fig. 21 is a perspective view of a lock release member slidably provided to the hand push lever of embodiment 3.

Fig. 22 is a longitudinal sectional view of the lock releasing member portion according to embodiment 3.

Fig. 23 is a partially cut-away perspective view of a conventional stroller.

Fig. 24 is a schematic plan view showing a conventional hand push lever.

Detailed Description

Embodiment 1

Embodiment 1 of the present invention will be described below with reference to the drawings.

First, a stroller in which the hand push bar 15 of the stroller of the present invention is assembled will be described with reference to fig. 1 to 6.

Fig. 1 is a perspective view showing a schematic configuration of a stroller, and fig. 2 is a vertical sectional side view of the stroller, and the stroller includes a pair of left and right front legs 12 having front wheels 11, a pair of left and right rear legs 14 having rear wheels 13, a hand push bar 15 bent in a substantially U shape, a pair of left and right handrails 16, and left and right 2 side vertical pipes 17 pivotally attached to rear ends of the handrails 16 and extending in parallel to each other.

The front ends of the front legs 12 and the rear legs 14 are pivotally attached to the front end of the armrest 16. The rear end of the armrest 16 is pivotally attached to the apex of the side vertical tube 17. The left and right front legs 12 are connected by front leg connecting stays 22 also serving as footrests. The left and right rear legs 14 are connected by rear leg connecting stays 23. The lower end of an L-shaped bracket 19 is pivotally attached to the rear leg 14 via a shaft 19a, and the middle portion thereof is pivotally attached to the lower end of the side vertical tube 17 via a shaft 30. Further, frame attachment portions 31 are pivotally attached to the lower end portions of the left and right side vertical pipes 17 via shafts 30 on the inner surface sides facing each other (see fig. 3). Further, the lower end portion of the U-shaped hand push lever 15 is pivotally attached to the shaft 30 together with the bracket 19 disposed outside the side vertical pipe 17.

The front end portions of the side frames 24 are pivotally mounted to the left and right front legs 12 at intermediate positions, respectively. The front ends of the left and right side frames 24 are connected by a front upper connection stay 32. Further, the rear end portions of the side frames 24 are fixedly connected to the middle positions of the frame mounting members 31. A stay attachment portion 31a is provided in the frame attachment member 31 so as to protrude downward from a position opposite to the shaft 30 at a fixed connection position to the side frame 24. Rear upper connection stays 33 are fixedly connected to the stay attachment portions 31a, and the left and right frame attachment members 31 are connected to each other by the rear upper connection stays 33. Further, left and right front end portions of a back support frame 34 formed in an inverted U shape are pivotally attached to the left and right frame attachment members 31 between the shafts 30 and the rear upper connecting stay 33 via shafts 35, and the inverted U-shaped back support frame 34 is swingably attached to the frame attachment members 31 (see fig. 3).

A lock member 20 that engages with a free end portion of the bracket 19 in the deployed state of the stroller to maintain the deployed state is slidably attached to a lower end portion of the side vertical tube 17. On the other hand, a lock releasing member 38 operated by a remote operation device 37 provided on the hand lever 15 is slidably attached to the hand lever 15 along the hand lever 15. Then, if the lock releasing member 38 is pulled up by the remote operation device 37, the lock releasing member 38 is pulled up. Then, if the lock releasing member 38 is pulled upward, the lock releasing lever 39 provided in the lock releasing member 38 abuts against the operation plate 40 provided in the lock member 20, and the lock member 20 is pulled upward. Therefore, the locking of the bracket 19 is released, and the stroller body can be brought into a 2-fold state, so that the front legs 12 and the rear legs 14 are brought into a substantially parallel state.

Further, locking projections 41 (only one of which is shown (see fig. 1)) projecting in the lateral direction are fixedly provided on the outer surfaces of the armrests 16 and the lateral vertical pipes 17 on the outer sides thereof. Further, an engaging member 42 having a recess portion engaged with the engaging protrusion 41 is slidably attached to the hand push lever 15 along the hand push lever 15. Therefore, by pulling up the locking member 42, the locking member 42 is released from the locking projection 41, and the hand push lever 15 is swung rearward or forward, whereby the hand push lever 15 can be brought into a face-to-face pressing state or a back-to-face pressing state.

The left and right side frames 24, 24 and the front upper connecting stay 32 connecting the front ends thereof constitute a U-shaped seat support frame. Further, a base material 46 for a seat bottom is stretched over a portion surrounded by the seat support frame and the back support frame 34 connected to the seat support frame. That is, both side edge portions of the seat portion 46a of the base material 46 for the seat bottom are attached to the left and right side frames 24, and the front end edge portion of the seat portion 46a is attached to the front upper connecting stay 32. Both side edge portions of the back contact portion 46b connected to the seat portion 46a are attached to the left and right side frame portions 34a of the back contact portion support frame 34, and the rear end edge portion of the back contact portion 46b is attached to the horizontal rod portion 34b connecting the left and right side frame portions 34a of the back contact portion support frame 34. The base material 46 for the bottom seat is stretched in a tensioned state in the front-rear direction and the left-right direction. A bottom seat tension member 47 is sewn to the back surface side of the seat portion 46a of the bottom seat base material 46 stretched over the seat support frame (see fig. 2). Further, the front end portion of the bottom-seat tension member 47 is attached to the rear-side upper-portion connecting stay 33 provided below the pivot shaft 35 of the back support-portion support frame 34 in the unfolded state of the stroller (see fig. 2). Then, the seat portion 46a of the bottom seat is also pulled rearward by the bottom seat tension member 47, and therefore, the base material 46 for the bottom seat is pulled from all directions, and is more reliably tensioned.

On the back surface side of the back support frame 34 on which the bottom seat 46 is stretched, a reclining stretch band 48 fixedly connected to the left and right side vertical pipes 17 is disposed. Therefore, by adjusting the length of the slope extension belt 48, the inclination angle of the back contact portion 46a can be adjusted.

In this way, the base material 46 for the bottom seat is stretched in a tensioned state in the front-rear direction and the left-right direction, and the rigidity of the bottom seat can be maintained. Therefore, a plate member such as a conventional stroller is not required, and weight reduction can be achieved. Since the rear upper connecting stay 33 is provided below the pivot of the back support frame 34, even if the base material 46 for the under seat is bent by the weight of the infant, the buttocks do not come into contact with the rear upper connecting stay 33, and no uncomfortable feeling is generated.

On the other hand, as shown in fig. 3, the front end of a side plate 50 for protecting the side of an infant is pivotally attached to a shaft 30 connecting the side vertical pipe 17 and the frame attachment member 31. As shown in fig. 4, bearings 51, 51 are provided at both left and right ends of the horizontal rod portion 34b connecting the left and right side frame portions 34a of the back support portion support frame 34. A lower end portion of a headrest 52 for protecting the head of the infant is pivotally attached to the bearings 51 and 51 via a shaft 53. Further, pins 54 are provided to protrude from both left and right side portions of the headrest 52, and the pins 54 can be engaged with long holes 155 formed in the rear end portion of the side plate 50.

Fig. 3 is a diagram showing a state in which the back support frame 34 is tilted down to allow the infant to lie down, and the headrest 52 is raised upward with respect to the plane of the back support frame 34. Therefore, both side portions of the infant are protected by the left and right side plates 50, and the head of the infant is protected by the raised headrest 52. At this time, if the length of the reclining belt 48 is shortened (see fig. 2) and the inclination angle of the back support frame 34 is increased as shown in fig. 5, the side plate 50 is also tilted upward, and the headrest 52 is swung clockwise in fig. 3 about the shaft 53 by the engagement of the pin 54 and the elongated hole 155, so that the headrest 52 and the back support frame 34 are substantially flush with each other. Therefore, the infant can be placed in a lying down state.

On the other hand, if the reclining belt 48 is loosened in the state shown in fig. 5, the side plate 50 swings downward together with the back support frame 34, and the headrest 52 swings upward along with it to be in the state shown in fig. 3, whereby the head of the infant can be protected.

In the case of the 2-fold state, the side plate 50 is brought into the state shown in fig. 5 together with the back support frame 34, and then the remote operation device 37 provided on the hand push lever 15 is operated, whereby the stroller can be folded in the same manner as the conventional stroller. Fig. 6 shows the state of the back support frame 34, the side plate 50, and the like in this folded state.

Next, the hand push bar 15 of the stroller of the present invention will be described in further detail with reference to the drawings. Here, fig. 1 and 7 to 15 show details of the hand push bar 15 of the stroller of the present invention.

As shown in fig. 1, the hand push lever 15 of the present embodiment includes a pair of side pipes 67 extending upward from the lock release member 38 and the locking member 42, a U-shaped pipe 68 disposed between the pair of side pipes 67, and the remote operation device 37 provided on the U-shaped pipe 68. A wire 69 is connected to the remote operation device 37, and the wire 69 is connected to the lock release member 38 provided below each side tube 67.

As shown in fig. 1, 7, 8, and 9, the hand push lever 15 includes a first joint 61 provided on each side tube 67 and having a first external gear 71 and a wire guide path 90; and a second joint 65 provided on the U-shaped pipe 68, having a second external gear 83 and a wire guide path 90, and rotatable with respect to the corresponding first joint 61.

An internal gear 63 detachably engaged with the first external gear 71 of the first joint 61 and the second external gear 83 of the second joint 65 is provided between the first joint 61 and the second joint 65.

Further, between the other joint 65 and the ring gear 63, a guide member 64 having a wire guide shaft 74 that guides the wire 69 to the vicinity of the rotation center of the other joint 65 is provided.

Further, the other joint 65 is provided with a push button 66 for releasing engagement between the other external gear 83 and the internal gear 63 of the other joint 65, and a spring 62 for pushing back the internal gear 63 pressed by the push button 66 is disposed between the internal gear 63 and the one joint 61 (see fig. 14 (b)).

Next, the one joint 61, the internal gear 63, the guide member 64, and the other joint 65 will be described in more detail with reference to fig. 10 to 13.

First, the first joint 61 includes the first external gear 71 engaged with the internal gear 63, the spring fixing shaft 72 supporting and fixing the spring 62 from the inside, and the wire guide path 90 guiding the wire 69, and the spring 62 is attached to the fixing shaft 72 (see fig. 10 a and 10 b).

The ring gear 63 is provided between the one joint 61 and the other joint 65, and as shown in fig. 11(a), the ring gear 63 has a spring fixing space 73 formed near the center thereof, into which the spring 62 is inserted and fixed. As shown in fig. 11 b, a guide shaft fixing space 79 into which a wire guide shaft 74 (see fig. 12 a and 12 b) of the guide member 64 is inserted is formed in the inner gear 63 on the side opposite to the fixing space 73, and a notch 99 for holding the wire 69 is provided on the outer periphery of the inner gear 63 on the side (lower side) of the side tube 67.

Next, the guide member 64 will be described with reference to fig. 12(a) and 12 (b). As shown in fig. 12(a) and 12(b), the guide member 64 includes a holding plate 76 and a wire guide shaft 74 provided near the rotation center of the other joint 65 and guiding the wire 69. The wire guide shaft 74 is held by the holding plate 76 and is inserted and fixed into a guide shaft fixing space 79 (see fig. 11 a and 11 b) of the internal gear 63. Further, a guide projection 77 for guiding the wire 69 is provided on the holding plate 76.

Here, as shown in fig. 12 a and 12 b, the guide projection 77 provided on the holding plate 76 forms a space 89 on the U-shaped tube side (upper side) and a slit 81 for holding the wire 69 on the side tube side (lower side). The space 89 is provided so that the wire 69 can freely rotate above the wire guide shaft 74, and the notch 81 is a member that securely guides the wire 69 to the vicinity of the rotation center by holding the wire 69 below the internal gear 63. The holding plate 76 of the guide member 64 is provided with an escape groove 82 for escaping the wire 69 in order to reduce the force applied to the wire 69 when the guide member 64 is pressed by the projection 86 of the push button 66 (see fig. 14 (b)).

As shown in fig. 13(a), the other joint 65 is provided with the other external gear 83 engaged with the internal gear 63, the hollow portion 84 of the insertion guide member 64, and a wire guide path 90 for guiding the wire 69. As shown in fig. 13(b), a button insertion portion 85 into which the button 66 is inserted is provided on the surface of the other joint 65 opposite to the hollow portion 84.

Next, a method of assembling the one joint 61, the spring 62, the ring gear 63, the guide member 64, and the other joint 65 will be described with reference to fig. 7, 8, 9, and 14 (a).

As shown in fig. 7, 8, 9 and 14(a), the spring 62 is inserted into the spring fixing shaft 72 of the one joint 61. Next, the spring 62 fixed by the spring fixing shaft 72 is inserted into the spring fixing space 73 of the internal gear 63. The wire guide shaft 74 of the guide member 64 is inserted and fixed into the guide shaft fixing space 79 of the inner gear 63, and the fixed guide member 64 is inserted into the hollow portion 84 of the other joint 65 and contacts the protrusion 86 of the push button 66. At this time, the internal gear 63 engages with both the one external gear 71 of the one joint 61 and the other external gear 83 of the other joint 65.

Next, the operation of the present embodiment configured as described above will be described.

As shown in fig. 14(a), in a state where the push button 66 is not pushed down, the internal gear 63 engages with both the one external gear 71 of the one joint 61 and the other external gear 83 of the other joint 65. Therefore, since the other joint 65 is fixed without rotating about the one joint 61, the U-shaped pipe 68 provided on the other joint 65 can be fixed to the side pipe 67 provided on the one joint 61.

On the other hand, as shown in fig. 14(b), by pressing the button 66 provided on the other joint 65 provided on the U-shaped pipe 68, the internal gear 63 is pushed by the protrusion 86 of the button 66, and the engagement between the internal gear 63 and the other external gear 83 of the other joint 65 can be released. Therefore, since the other joint 65 can freely rotate around the one joint 61, the U-shaped pipe 68 provided in the other joint 65 can freely rotate with respect to the side pipe 67 provided in the one joint 61.

Therefore, the height of the U-shaped tube 68 from the ground can be adjusted, and the stroller can be easily pushed by adjusting the height of the U-shaped tube 68 to a height suitable for the operator.

In addition, when the stroller is stored, the length of the stroller in the height direction can be shortened by bending the U-shaped tube 68, and the space for storing the stroller can be saved.

As shown in fig. 12(a) and 12(b), since the holding plate 76 of the guide member 64 is provided with the escape groove 82 through which the wire 69 passes, the wire 69 can be escaped into the escape groove 82 when the push button 66 is pushed. Therefore, the force applied to the wire 69 when the push button 66 is pushed can be reduced.

Next, the operation of the wire 69 when the U-shaped tube 68 is rotated with respect to the side tube 67 will be described.

As shown in fig. 15(a) and 15(b), when the U-shaped tube 68 is not bent, the wire 69 extends from the unlocking member 38 of the side tube 67 to the remote operation device 37 of the U-shaped tube 68, and is arranged substantially linearly between the one joint 61 and the other joint 65 while bypassing the wire guide shaft 74.

On the other hand, when the U-shaped tube 68 is bent, the other joint 65 rotates with respect to the one joint 61. At this time, as shown in fig. 15(c) and 15(d), the wire 69 extends from the unlocking member 38 of the side tube 67 to the remote operation device 37 of the U-shaped tube 68, and is wound around and bent around the wire guide shaft 74.

Here, since the wire guide shaft 74 around which the wire 69 is wound is provided near the rotation center of the other joint 65, the wire 69 can pass near the rotation center of the other joint 65. Therefore, the wire 69 can be wound around the rotation center of the other joint 65 without being wound around the outer side of the ring gear 63.

Therefore, it is not necessary to rotate the wire 69 in advance to form the loop 59 and to make the idle rotation amount (see fig. 21). Therefore, the wire 69 can be used only in a minimum length, and the weight of the stroller can be reduced.

Further, since the wire 69 is coupled to the lock releasing member 38 without forming the ring 59, there is no unnecessary resistance when the button (not shown) of the remote operation device 37 is pushed and the wire 69 is pulled upward. Therefore, the wire 69 connected to the lock releasing member 38 can be easily driven and operated.

Further, since it is not necessary to wind the wire 69 into a loop, it is not necessary to form a loop of the wire 69 in the process of manufacturing the stroller.

Further, since the guide projection 77 provided on the guide member 64 has a space 89 on the U-shaped tube side (upper side), the wire 69 can freely move in the space 89. Therefore, the wire 69 can freely rotate upward around the wire guide shaft 74 (see fig. 15).

As shown in fig. 12 a and 12 b, the guide projection 77 provided on the guide member 64 has a notch 81 on the side tube side (lower side), and as shown in fig. 11 a and 11 b, the internal gear 63 also has a notch 99 on the side tube side (lower side). Therefore, the wire 69 can be held below the guide member 64 and the internal gear 63. Therefore, the wire 69 can be reliably guided to the vicinity of the rotation center.

Embodiment 2

Next, embodiment 2 of the present invention will be described with reference to fig. 16 to 20. In embodiment 2 shown in fig. 16 to 20, a wire guide shaft 87 is provided on one of the one joint 61 and the other joint 65 instead of the guide member 64 provided with the guide wire 69, and the other is substantially the same as embodiment 1 shown in fig. 1 to 15.

In embodiment 2 shown in fig. 16 to 20, the same portions as those in embodiment 1 shown in fig. 1 to 15 are given the same reference numerals, and detailed description thereof is omitted.

First, a structure in which the wire guide shaft 87 is provided to the one joint 61 will be described with reference to fig. 16 to 18.

As shown in fig. 16, 17, and 18, the one joint 61 includes a joint main body 92, and a joint cover 93 covering the joint main body 92.

The joint main body 92 of the one joint 61 is provided with a wire guide path 91 for guiding the wire 69, and a wire guide shaft 87 for guiding the wire 69 near the rotation center of the other joint 65. Further, a convex portion 97 that supports the spring 62 is provided on the side of the wire guide shaft 87 on the side of the internal gear 63 so that the spring 62 does not enter the wire guide path 91 (see fig. 17).

Here, fig. 18(a) is a schematic view of the joint main body 92 of the one joint 61 as viewed from above, fig. 18(b) is a schematic view of the joint cover 93 as viewed from above, and fig. 18(c) is a schematic view of a state in which the wire 69 is inserted into the cutout 94 of the joint main body 92 and the wire guide hole 95 of the joint cover 93 as viewed from above after the joint main body 92 and the joint cover 93 are assembled.

As shown in fig. 18(a), a notch 94 extending in the rotational direction of the other joint 65 is provided on the U-shaped tube 68 side (upper side) of the joint main body 92 of the one joint 61.

As shown in fig. 18(b), the joint cover 93 is provided with a wire guide hole 95 through which the wire 69 passes. As shown in fig. 18 c, the joint cover 93 is disposed on the U-shaped pipe side (upper side) of the joint main body 92, and covers a notch 94 provided in the joint main body 92 and extending in the rotation direction of the other joint 65.

As shown in fig. 18(c), the wire 69 is disposed so as to pass through a slit 94 provided in the joint main body 92 and a wire guide hole 95 provided in a joint cover 93 disposed on the joint main body 92.

Here, when the other joint 65 rotates with respect to the one joint 61, the wire 69 can freely move along the slit 94 above the wire guide shaft 87. The joint cover 93 is rotatable on the joint main body 92, and when the other joint 65 is rotated with respect to the one joint 61, the joint cover 93 is pressed by the wire 69 inserted through the wire guide hole 95 and rotates on the joint main body 92.

As shown in fig. 17, the push button 66 includes a protrusion 86 that can come into contact with the internal gear 63, and a protrusion rod 88 that is integrally provided on the protrusion 86 and penetrates the internal gear.

Next, a method of assembling the joint body 92 and the joint cover 93 of the one joint 61, the spring 62, the ring gear 63, the other joint 65, and the push button 66 will be described with reference to fig. 16 to 19.

As shown in fig. 16 to 19, the joint cover 93 of the one joint 61 is disposed on the U-shaped pipe side (upper side) of the joint main body 92. Here, the joint cover 93 covers a notch 94 extending in the rotation direction of the other joint 65 on the U-shaped pipe side (upper side) of the joint main body 92.

Next, the spring 62 is disposed on the convex portion 97 provided on the internal gear 63 side on the side of the wire guide shaft 87 of the joint main body 92. Next, the internal gear 63 is fitted into the joint body 92 of the one joint 61, and the spring 62 is inserted into the spring fixing space 73 of the internal gear 63. Next, the other joint 65 is fitted into the joint body 92 of the one joint 61. The internal gear 63 at this time engages with both the one external gear 71 of the one joint 61 and the other external gear 83 of the other joint 65.

Then, the projecting rod 88 (see fig. 17) of the push button 66 is inserted through the hole 88d of the other joint 65, the hole 88c of the ring gear 63, the inside of the spring 62, the hole 88b of the joint main body 92, and the hole 88a of the joint cover 93. In this case, the joint cover 93, the joint main body 92, the spring 62, the internal gear 63, and the other joint 65 are integrally assembled.

Next, the operation of the present embodiment configured as described above will be described.

As shown in fig. 19(a), in a state where the push button 66 is not pushed, the internal gear 63 engages with both the one external gear 71 of the one joint 61 and the other external gear 83 of the other joint 65. Therefore, since the other joint 65 is fixed without rotating about the one joint 61, the U-shaped pipe 68 provided in the other joint 65 can be fixed to the side pipe 67 provided in the one joint 61.

On the other hand, as shown in fig. 19(b), by pressing the button 66 provided on the other joint 65, the protrusion 86 of the button 66 pushes the internal gear 63, and the engagement between the internal gear 63 and the other external gear 83 of the other joint 65 can be released. Therefore, since the other joint 65 can freely rotate around the one joint 61, the U-shaped pipe 68 provided in the other joint 65 can freely rotate with respect to the side pipe 67 provided in the one joint 61.

Therefore, the height of the U-shaped tube 68 from the ground can be adjusted, and the stroller can be easily pushed by adjusting the height of the U-shaped tube 68 to a height suitable for the operator.

In addition, when the stroller is stored, the length of the stroller in the height direction can be shortened by bending the U-shaped tube 68, and the space for storing the stroller can be saved.

Next, the operation of the wire 69 when the U-shaped tube 68 is rotated with respect to the side tube 67 will be described.

As shown in fig. 20 a, when the U-shaped tube 68 is not bent, the wire 69 is inserted through a slit 94 provided in the joint main body 92 and extending in the rotation direction of the other joint 65, and a wire guide hole 95 provided in the joint cover 93 (see fig. 18 c). In this case, the wire 69 extends from the unlocking member 38 of the side tube 67 to the remote operation device 37 of the U-shaped tube 68, and is substantially linear between the one joint 61 and the other joint 65.

On the other hand, as shown in fig. 20(b), when the U-shaped tube 68 is bent, the other joint 65 is rotated relative to the one joint 61, and at this time, the wire 69 extends from the unlocking member 38 of the side tube 67 to the remote operation device 37 of the U-shaped tube 68, and is wound around the wire guide shaft 87 and bent.

Here, since the wire guide shaft 87 around which the wire 69 is wound is provided near the rotation center of the other joint 65, the wire 69 can pass near the rotation center of the other joint 65. Therefore, the wire 69 can be wound around the vicinity of the rotation center of the other joint 65 without being wound outside the internal gear 63.

Further, since the convex portion 97 is provided on the side of the wire guide shaft 87, the spring 62 can be prevented from falling into the wire guide path 91 of the one joint 61. Therefore, the wire 69 can be reliably wound around the wire guide shaft 87.

This eliminates the need to rotate the wire 69 in advance to form the loop 59 and create the idle rotation amount (see fig. 21). Therefore, the wire 69 can be used only in a minimum length, and the weight of the stroller can be reduced.

Further, since the wire 69 is connected to the lock releasing member 38 without forming the loop 59, there is no unnecessary resistance when the wire 69 is pulled upward by pressing a button (not shown) of the remote operation device 37. Therefore, the wire 69 connected to the lock releasing member 38 can be easily driven and operated.

Further, since it is not necessary to wind the wire 69 into a loop, it is not necessary to form a loop of the wire 69 in the process of manufacturing the stroller.

As shown in fig. 18(a), since the joint main body 92 of the one joint 61 has a slit 94 provided on the U-shaped pipe side and extending in the rotation direction of the other joint 65, the wire 69 can freely move in the slit 94 extending. Therefore, as shown in fig. 20(a) and 20(b), the wire 69 can freely rotate around the wire guide shaft 87.

As shown in fig. 18(b), the joint cover 93 of the one joint 61 is rotatable in the rotation direction of the other joint 65, and has a wire guide hole 95 through which the wire 69 passes. Therefore, as shown in fig. 20(a) and 20(b), the wire 69 can freely rotate around the wire guide shaft 87, and the notch 94 extending from the joint main body 92 can be hidden, so that the appearance of the one joint 61 can be maintained satisfactorily.

The convex portion 97 provided on the side of the wire guide shaft 87 may be any type as long as it can support the spring 62.

Further, the sizes of the wire guide shaft 87 and the spring 62 can also be adjusted so that the spring 62 does not fall into the wire guide path 91. In this case, the convex portion 97 need not be provided.

In the above embodiment, the example in which the one joint 61 includes the joint main body 92, the joint cover 93, and the wire guide shaft 87 has been illustrated, but the present invention is not limited thereto, and the other joint 65 may include the joint main body 92, the joint cover 93, and the wire guide shaft 87.

Embodiment 3

Next, embodiment 3 of the present invention will be described with reference to fig. 21 and 22. In embodiment 3 shown in fig. 21 and 22, the same portions as those in embodiment 1 shown in fig. 1 to 15 are given the same reference numerals, and detailed description thereof is omitted. Fig. 21 is a perspective view of the lock release member 38 slidably provided in the hand push lever 15, and fig. 22 is a longitudinal sectional view of the lock release member 38.

As shown in fig. 1 and 22, the hand push lever 15 of the present embodiment includes a pair of side pipes 67 each having a long hole 155 extending in the axial direction on a side surface thereof, and a U-shaped pipe 68 disposed between the pair of side pipes 67.

As shown in fig. 22, a guide member 156 having a projection 156a extending in the axial direction of the side tube 67 is inserted and fixed into the side tube 67. Further, an inner slide member 157 is provided in the side tube 67 so as to be slidable in the axial direction along the guide member 156. Between the protruding portion 156a of the guide member 156 and the inner slide member 157, a spring 161 that biases the inner slide member 157 to an initial position with respect to the guide member 156 is stretched. A substantially plate-shaped lock release member (outer slide member) 38 is provided on the outer surface of the side tube 67, and the lock release member 38 is connected to the inner slide member 157 via the tube long hole 155 and is slidably attached to the outer surface of the side tube 67 along the longitudinal direction of the tube long hole 155.

As shown in fig. 21 and 22, the push lever 15 has a flat portion 15a formed at a portion thereof, and a substantially plate-shaped lock release member 38 is attached to an outer surface of the flat portion 15a so as to be slidable along the push lever 15. An unlocking lever (projecting portion) 39 projecting in a substantially horizontal direction is provided on the outer surface of the inside (side vertical tube 17 side) of the unlocking member 38 in a projecting manner.

As shown in fig. 22, the hand push lever 15 is provided with the elongated hole 155 extending in the axial direction as described above. The base portion 38a of the substantially plate-shaped lock releasing member 38 provided on the side of the side tube 67 is slidably engaged with the long hole 155.

Further, as shown in fig. 22, a guide member 156 is inserted and fixed into the hand push lever 15, and an inner slide member 157 is slidably attached to a side surface of the guide member 156. The inner slide member 157 is slidably engaged along a long hole 158 formed in the guide member 156 and extending in the axial direction. The inner slide member 157 is integrally coupled to the unlocking member 38 by a coupling member 159 such as a tapping screw attached to the unlocking member 38. Further, the distal end portion (lower end portion) of the wire 60 operated by the remote operation device 37 is coupled to the inner slide member 157. Further, as described above, the spring 161 is provided between the guide member 156 and the inner slide member 157, and biases the inner slide member 157 to be at the initial position, i.e., below, with respect to the guide member 156.

Then, if the remote operation device 37 is operated to pull up the wire 60 upward in order to swing the front legs 12 and the rear legs 14 of the stroller in a substantially parallel state and fold the stroller body into a 2-fold state for easy carrying, the inner slide member 157 is pulled up against the spring 161 together with the lock release member 38 constituting the outer slide member. Therefore, the lock releasing member 38 constituting the external sliding member moves upward along the longitudinal direction of the long hole 155. Therefore, the lock member 20 (see fig. 1) that engages with the free end portion of the bracket 19 in the deployed state of the stroller and maintains the deployed state slides along the side vertical tube 17 by the lock release lever 39 provided so as to protrude from the lock release member 38. As a result, the locking member 20 and the bracket 19 can be disengaged from each other, and the stroller body can be folded into a 2-fold state.

The lock releasing member 38 constituting the outer slide member is formed in a substantially plate shape. Therefore, the lock release member is lighter than a conventional lock release member formed in a cylindrical shape (see fig. 23), and the weight of the stroller body and the like can be reduced. Further, the long hole 155 extending in the longitudinal direction for guiding the sliding of the lock releasing member 38 constituting the outer slide member may be formed only on one side of the tube, and the processing can be simplified.

In the present embodiment, the present invention is applied to the unlocking member 38, but the hand push lever 15 of the stroller may be applied to the locking member 42 held in the face-to-face pressing state or the back-face pressing state, and the weight of the member may be reduced. Further, in the above-described embodiment, the example in which the inner slide member 157 is moved by the remote operation device via a wire or the like and the outer slide member is operated via the inner slide member 157 has been described, but the present invention is not limited to this, and the outer slide member may be operated directly by hand.

Claims (12)

1. A handle bar for a stroller, comprising:

a pair of side tubes;

a U-shaped pipe disposed between the pair of side pipes;

the remote operation device is arranged on the U-shaped pipe;

a wire provided in the remote operation device and connected to the lock releasing member provided in each of the side pipes;

a square joint provided on each side tube and having a square external gear and a wire guide path;

a second joint provided on the U-shaped pipe, having a second external gear and a wire guide path, and rotatable with respect to the corresponding first joint;

an internal gear provided between the one joint and the other joint and detachably engaged with the one external gear of the one joint and the other external gear of the other joint;

the guide member is provided between the first joint and the second joint and adjacent to the internal gear, and has a wire guide shaft for guiding the wire to the vicinity of the rotation center of the second joint.

2. The handle bar for a stroller according to claim 1, wherein the guide member has a holding plate for holding the wire guide shaft, and a guide protrusion provided on the holding plate for guiding the wire.

3. The push rod for a stroller according to claim 2, wherein the guide protrusion of the guide member forms a space on the side of the U-shaped tube, and a cut for retaining the wire is formed on the side of the side tube.

4. The push rod for a stroller according to claim 1, wherein a button for releasing engagement between the outer gear and the inner gear of the other joint is provided on the other joint.

5. The handle bar for a stroller according to claim 2, wherein an escape groove for escaping the wire is provided on the holding plate of the guide member.

6. The push bar for a stroller according to claim 1,

a spring is arranged between the internal gear and one side joint;

a spring fixing shaft for supporting and fixing the spring from the inside is provided on one of the joints.

7. A handle bar for a stroller, comprising:

a pair of side tubes;

a U-shaped pipe disposed between the pair of side pipes;

the remote operation device is arranged on the U-shaped pipe;

a wire provided in the remote operation device and connected to the lock releasing member provided in each of the side pipes;

a square joint provided on each side tube and having a square external gear and a wire guide path;

a second joint provided on the U-shaped pipe, having a second external gear and a wire guide path, and rotatable with respect to the corresponding first joint;

an internal gear provided between the one joint and the other joint and detachably engaged with the one external gear of the one joint and the other external gear of the other joint;

one of the one joint and the other joint has a wire guide shaft for guiding a wire to the vicinity of the rotation center of the other joint.

8. The push bar for a stroller according to claim 7,

one of the one joint and the other joint has a joint body to which a wire guide shaft is attached;

the joint body has a notch extending in the rotational direction of the other joint.

9. The push bar for a stroller according to claim 8,

a joint cover which covers a notch extending in the rotation direction of the other joint and is rotatable in the rotation direction of the other joint is provided on the joint body;

the joint cover has a wire guide hole through which the wire passes.

10. The push rod for a stroller according to claim 7, wherein a button for releasing engagement between the outer gear and the inner gear of the other joint is provided on the other joint.

11. The push bar for a stroller according to claim 7,

a spring is arranged between the inner gear and the metal wire guide shaft;

a convex part for supporting the spring is arranged on the side of the wire guide shaft.

12. The push rod for a stroller according to claim 10, wherein the push button has a protrusion portion abutting against the internal gear, and a protrusion rod provided on the protrusion portion and penetrating through the internal gear.