JP4220438B2 - Steering device for guardian of infant vehicle and infant vehicle equipped with this device - Google Patents

Description

  The present invention is for an infant capable of operating an infant vehicle such as an infant two-wheel vehicle (infant bicycle), an infant tricycle, and an infant car equipped with a foot pedal while pushing from behind in a posture where a guardian stands. The present invention relates to a steering apparatus for a guardian of a vehicle and an infant vehicle equipped with the apparatus.

  Conventionally, as an infant vehicle equipped with an infant vehicle guardian steering device (hereinafter simply referred to as "guardian steering device"), for example, a guardian handle is provided at the rear of the body frame, An infant tricycle having a structure in which the handle for the guardian, the front wheel and the support shaft of the handle are interlocked via an interlocking mechanism is disclosed (for example, Patent Document 1).

JP 2001-247072 (Japanese Patent No. 3378898)

  The interlock mechanism fits the ring body that rotates integrally with the support shaft of the front wheel fork and the lower end of the operating rod of the handle for the guardian, and is rotatably inserted into the attachment tube at the rear end of the main body frame. And a pair of push-bull cables that connect the flange and the outer periphery of the ring body to each other.

  And when the guardian's handle is unnecessary, the operation tube and the interlocking mechanism can be easily detached from the main body frame by removing the connecting tube from the mounting tube and removing the ring body and the collar part from the upper and lower covers, respectively. It is composed.

  However, in this interlocking mechanism, the connecting tube must be rotatably inserted into the mounting tube, and a pushbull cable is further wired to the flange provided in the intermediate portion of the connecting tube. There was a problem that it was very complicated and costly.

  In addition, when the guardian handle is not required, the connecting pipe must be removed from the mounting pipe, and the ring body and the collar part must be removed from the upper and lower covers, which is cumbersome and requires complicated tools. In particular, there were problems such as being unable to handle in ordinary households.

  The present invention aims to solve the above-mentioned problems, and has a simple structure in which a lower end portion of a long handle shaft is simply attached to and detached from a rear wire operation portion case, and a handle for a guardian is provided. When it is unnecessary, a steering device for a guardian of an infant vehicle that can be easily removed and used as a general infant vehicle, and an infant vehicle equipped with the device are provided.

In order to achieve the above object, a steering device for a guardian of an infant vehicle according to the present invention is provided with a long handle shaft having a guardian handle at its upper end, and a lower part of the long handle shaft at the bottom of the infant vehicle. A holding portion that holds the posture in a rear upward direction, a rear wire operation portion case provided in the holding portion, a front wire operation portion case provided on the handle shaft of the infant vehicle, and the wires before and after these and a two pull wires are connected to the operation unit casing, inside the rear of the wire operating portion case, together with the length one wire operation unit that rotates in conjunction with the long handle shaft is provided while for supporting the outer end portion of each of the push-pull wire to the right and left side walls of the case, inside the front of the wire operating section case, the other wire operating portion provided al With that, and to support the outer of the other end of each of the push-pull wire to the right and left side walls of the case to rotate the elongate handle shaft and the one of the wire operating portion by operation of the handle for the parents In the infant vehicle guardian's steering device configured to rotate the other wire operation part via the push-pull wire , the rear wire operation part case is divided into upper and lower parts. The upper case is connected to the lower end of the holding portion in a non-rotatable manner with the long handle shaft inserted through an opening formed on the upper surface thereof. , the lower case is detachably attached to the lower end portion of the elongated handle shaft with the one wire operating unit, configured to rotate together with the elongate handle shaft And it is characterized in that it is.

  That is, the steering device for a guardian of the present invention is used by being attached to an infant vehicle such as a bicycle for infants, a tricycle for infants, a car for infants, and the like. It is located behind the seat of the infant vehicle via the long handle shaft and its holding part so that the guardian who is behind the vehicle can hold it in his / her natural standing posture.

  Here, the handle for the guardian may have a shape that can be operated with both hands, but may be one that can be operated with one hand, such as an elliptical shape, a substantially triangular shape, or a cylindrical grip shape. Among these, an elliptical shape that is easy to hold by hand and easy to push forward by hand is optimal.

  Specifically, for example, by rotating the steering handle in either the left or right direction, the long handle shaft supporting the steering handle is interlocked, and the wire attached to the lower end of the long handle shaft By rotating the operation part, the two push-pull wires are operated, and together with the wire operation part provided on the handle shaft of the infant vehicle, this handle shaft is rotated to change the steering direction of the front wheel. I can decide.

  In this case, there is no need to adopt a complicated structure as in the prior art, and the lower end portion of the long handle shaft provided with a guardian handle can be simply structured to be attached to the rear wire case portion. .

  And while the infant is on the vehicle for infants, the guardian can change the direction freely by the guardian's hand while pushing with one hand from behind while walking in a natural standing posture.

  On the other hand, when the guardian's handle is not required, it can be easily removed simply by removing the long handle shaft from the rear wire operating portion, and can be used as a general infant vehicle.

  By the way, in the steering device for a guardian of the present invention described above, it is used by being attached from the rear part to the rear upper part of the infant vehicle. Can be mentioned. In particular, it is desirable to attach auxiliary wheels on both sides of the rear wheel. In this case, the long handle shaft is attached so that it passes between the saddle stays on the left and right sides from the rear of the infant bicycle crankshaft, and is directed to the rear upper side of the infant bicycle. This can be achieved by attaching or fixing the holding portion to an appropriate frame such as the left and right saddle stays, the left and right chain stays, and the cylindrical portion holding the crankshaft.

  In addition, the steering device for a guardian of the present invention can be used by being attached to an infant tricycle or an infant vehicle.

  The guardian steering device according to the present invention has a structure that is detachable from the infant vehicle, and when the guardian steering device is not used or when the guardian steering device is no longer necessary. In addition, it can be easily removed.

  In the steering system for a guardian of an infant vehicle according to the present invention, the rear wire operation part case is configured by an upper case and a lower case divided into upper and lower parts, and the rear wire operation part case includes One side of the outer side of the push-pull wire is supported on the side wall of the upper case, while one wire operation part provided in the lower case is rotated together with the lower case by the operation of the guardian handle. It is configured to move.

  In this case, the rear wire operation unit case is divided into upper and lower parts, and one of the wire operation units in the rear wire operation unit case is rotated together with the lower case by the operation of the guard handle. It has a simple structure.

  If comprised in this way, it is not necessary to take the complicated structure like the past, and it can be made a simple structure which only attaches the lower end part of the long handle shaft provided with the handle for guardians to the back wire case part. It is.

  In this case, in order to facilitate the attachment of the long handle shaft, it is preferable that the rear portion of the infant vehicle is provided with a holding portion for attaching the lower portion of the long handle shaft to the rear upper side.

  Providing the holding portion to which the long handle shaft is attached as described above can cope with various types of infant vehicles such as infant bicycles, infant cars, infant tricycles and the like.

  Further, in the present invention, it is preferable that the long handle shaft has a structure that can be divided vertically so that the upper part can be removed leaving the lower part.

  When configured in this way, the guard shaft for the guardian and the holding part around it can be easily attached and detached, and the guard shaft for the guardian has a structure that can be divided vertically so that the upper part can be removed leaving the lower part, It can be easily attached to or removed from the infant vehicle as required.

  In the present invention, the long handle shaft has two openings in the connecting pipe for covering two pins urged by U-shaped springs from two opposite sides in the lower end portion thereof. It is desirable to have a structure that can be attached and detached by making it appear and disappear.

  If comprised in this way, a long handle shaft can be easily attached or detached only by pressing down two spring-biased pins.

  In the present invention, it is desirable that the tip portions of the two push-pull wires are attached to one rear end portion of one wire operation portion.

  In this case, each tip of the two push-pull wires only needs to be attached to one place at the rear end of the wire operation unit, and manufacturing can be simplified. Since it is attached to one place of the rear end of one wire operation part, the steering by the guardian becomes accurate.

  The infant vehicle according to the present invention includes the steering device for a guardian of an infant vehicle according to the present invention.

  By comprising in this way, the advantage as a steering device for guardians of the infant vehicle of this invention can be exhibited as an infant vehicle.

  According to the steering system for a guardian of an infant vehicle according to the present invention, it is not necessary to adopt a complicated structure as in the prior art, and the lower end portion of the long handle shaft provided with the guardian handle is connected to the rear wire. A simple structure that can be simply mounted on the case can be achieved.

  And, as a result of being formed in a simple structure that can be attached to and detached from the infant vehicle, it can be used as needed. When it is not necessary, it can be removed and simple shape like a general infant vehicle The effect that it can comprise is produced.

  According to the steering system for a guardian of an infant vehicle according to the present invention, the rear wire operation unit case is composed of an upper case and a lower case divided into upper and lower parts. One side of the outer side of the push-pull wire is supported on the side wall of the upper case, while one wire operation part provided in the lower case is rotated together with the lower case by the operation of the guardian handle. If it is configured to move, the operation of the guardian's handle can produce an effect such that one of the wire operation portions can be turned into a simple structure together with the lower case.

  According to the steering apparatus for guardians of other infant vehicles according to the present invention, it is not necessary to adopt a complicated structure as in the prior art, and the lower end portion of the long handle shaft provided with the guardian's handle is moved backward. In addition to being able to have a simple structure that can be simply mounted on the wire case portion, there are effects such as low cost.

  In this case, providing a holding portion to which the long handle shaft is attached provides an effect of being able to handle various types of infant vehicles such as infant bicycles, infant cars, and infant tricycles.

  In the present invention, if the guard shaft for the guardian and the holding portion around the guard shaft can be easily attached and detached, the guard shaft for the guardian has a structure that can be divided vertically so that the upper part can be removed leaving the lower part. Accordingly, there is an effect that it can be easily attached to or removed from the infant vehicle.

  In the present invention, the long handle shaft has two pins urged by springs having a U shape from two opposite sides in the lower end portion thereof at two openings of the connecting pipe to be sheathed. If it is configured to be detachable by protruding and retracting, it is possible to easily attach and detach the long handle shaft only by pressing the two spring-biased pins.

  In the present invention, when the front end portions of the two push-pull wires are attached to one rear end portion of one wire operation portion, the manufacturing is simple and each of the two push-pull wires is Since the tip portion is attached to one place of the rear end portion of one of the wire operation portions, there is an effect that the steering by the guardian becomes accurate.

  The infant vehicle according to the present invention is characterized by including the infant vehicle guardian steering device according to the present invention. Therefore, the infant vehicle guardian steering device according to the present invention. As a result, it is possible to exert the effect as an infant vehicle.

  Although a specific embodiment of the steering device for a guardian of the present invention applied to an infant bicycle will be described in detail, the present invention is not limited to this.

  FIG. 1A is a side view showing an infant bicycle equipped with a guardian steering device according to the first embodiment of the present invention (hereinafter abbreviated as the steering device of the first embodiment). The same figure (b) is a principal part top view which shows the handle for guardians, and the figure (c) is a rear view of the principal part of the handle for guardians.

  In FIG. 1A, the steering apparatus 1 according to the first embodiment is mounted on an infant bicycle 50. In this case, the steering apparatus 1 according to the first embodiment is equipped with a guardian's steering apparatus 2 and a guardian's brake apparatus 3. The long handle shaft 5 with the guard handle 4 attached to the upper end and the lower end of the long handle shaft 5 are mounted and held in a posture from the rear to the rear upper side of the infant bicycle 50. A part 6, a rear wire operation part case 7 that holds the holding part 6, and a front wire operation part case 53 provided on the handle shaft 51 of the infant bicycle 50.

  In the first embodiment, as shown in FIGS. 1B and 1C, the guard handle 4 for the guardian has an elliptical shape that can be easily held by the guardian with one hand. It is oriented substantially horizontally so that the guardian can easily push or rotate it with one hand.

  As shown in FIG. 1 (a), the handle boss 52 holding the handle shaft 51 of the infant bicycle 50 from the rear wire operation portion case 7 located on the lower side of the holding portion 6 is provided. Push-pull wires 18 and 19 are connected together with their outer members 20 and 21 toward the front wire operation unit case 53 attached to the lower portion.

  FIG. 2A is a side cross-sectional view showing the interior of the rear wire operation part case 7 which is the main part of the present invention located on the lower side of the holding part 6, and FIG. It is the plane sectional view similarly.

  As shown in each of these drawings, the rear wire operation portion case 7 is composed of an upper case 7A and a lower case 7B having a substantially circular shape in plan view in which the wire guide portions 7a and 7b protrude from the vicinity of both left and right ends, respectively. It is made of metal or resin having a vertically divided structure.

  An opening 7c is formed at the center of the upper surface of the upper case 7A so as to project the lower portion of the holding portion 6 together with the long handle shaft 5. A wire guide is provided below the elongated handle shaft 5 that projects into the opening 7c. The plate 8 is fixed with screws 13 and 14 together with one wire operation portion 9.

  The lower handle of the long handle shaft 5 is supported by inserting a screw 16 through a boss 7d projecting upward from the center of the inner lower surface of the lower case 7B. The boss portion is tightened and screwed strongly toward the screw groove 5a provided on the lower end surface of the boss so that the screw 16 and the lower case 7B are co-rotated in the same direction in conjunction with the rotation of the long handle shaft 5. 7d is supported.

  In this way, the long handle shaft 5 passes through the upper case 7A, is fastened to the inner surface of the lower case 7B with the screw 16, and is connected and attached to the lower case 7B.

  The holding part 6 and the upper case 7A are mounted with bolts 17 and 17 such that the flange part 6a formed at the lower part of the holding part 6 and the upper surface of the upper case 7A are overlapped.

  Then, the wire guide plate 8 has one end portion of the two push-pull wires 18 and 19 inserted from the wire guide portions 7a and 7b into the rear wire operation portion case 7, one from the right side and the other from the left side. The front end portions are attached to one rear end portion of one of the wire operation portions 9 by using bolts 22. Then, one end of the outer 20, 20 of each push-pull wire 18, 19 is attached to the tip of the wire guide portion 7a, 7b using a bolt.

  Next, the internal structure of the front wire operation unit case 53 of the present invention mounted on the infant bicycle 50 shown in FIG.

  FIG. 3A is an enlarged side sectional view showing the inside of the front wire operation portion case 53, and FIG. 3B is a plan sectional view.

  As shown in these drawings, the front wire operation part case 53 has substantially the same shape as the rear wire operation part case 7 described above, and the wire guide parts 53a and 53b are respectively provided from the rear part near the left and right ends. An opening 53c is formed in the center of the upper surface of the front wire operation part case 53 so that the lower part of the handle boss 52 is inserted together with the handle shaft 51. The other wire operation part 54 having a donut plate shape is attached to the lower part of the handle shaft 51 that has entered the opening 53c.

  Arc-shaped cutout grooves 54c and 54c formed on the left and right at the center of the rear end of the wire operation section 54, and pin holes 54b and 54b communicating with the cutout grooves 54c and 54c are formed in the vertical direction. ing.

  And the other end vicinity part of the two push pull wires 18 and 19 inserted in the wire operation part case 53 of the front from the said wire guide parts 53a and 53b, one side from the right side, and the other from the left side, respectively. 54 along the outer circumferential surface of each of the two push-pull wires 18 and 19 by inserting the pins attached to the respective tip portions into the pin holes 54b so as to overlap each other. The part is attached to the wire operation unit 54. The other ends of the outer 20, 21 of the push-pull wires 18, 19 are attached to the tips of the wire guides 53a, 53b.

  The handle shaft 51 and the wire operation unit 54 are connected by a pin 56 so as to be interlocked with the rotation direction.

  As shown above, by attaching one end of each of the two push-pull wires 18 and 19 to one wire operation unit 9 and the other end to the other wire operation unit 54, respectively, as shown in FIG. When the protector handle 4 shown is rotated in either the left or right direction, one wire operation portion 9 is rotated via the long handle shaft 5 shown in FIGS. 2 (a) and 2 (b). One push-pull wire 18 (19) is pulled. As a result, the other wire operation portion 54 shown in FIGS. 3A and 3B is rotated, and the steering handle 54 and the front wheel 55 of the infant bicycle 50 are supported through the handle shaft 51. The front wheel 55 can be steered in the left-right direction via the fork 56.

  FIG. 4 is a side view of the main part showing a structure for attaching the guardian steering device 2 to the infant bicycle 50, and FIG. 5 shows a state in which the support members 82 are attached to the left and right saddle stays 81, 81 of the infant bicycle. FIG. 6 shows a state in which the lower part of the holding unit of the guardian steering device 2 is mounted between the hanger lug (bottom bracket lug) 84 of the infant bicycle and the front ends of the left and right chain stays 85, 85. It is a top view and FIG. 7 is the side view similarly.

  As shown in these figures, the long handle shaft 5 and the holding portion 6 of the steering device 2 for the guardian have a split structure that can be attached and detached at the lower portion thereof.

  As shown in FIGS. 4 to 7, a cylindrical support member 82 is fixed between the left and right saddle stays 81, 81 of the infant bicycle 50. Then, the lower side 6B of the holding portion 6 is welded between a hanger lug (bottom bracket lug) 84 made of a metal cylinder supporting the crankshaft of the infant bicycle 50 and the left and right chain stays 85, 85. Wearing.

  Then, as shown in FIG. 4 to FIG. 7, in a state in which a cylindrical member Z for inserting and supporting the lower end portion of the upper holding portion 6 </ b> A is protruded upward on the upper end outer peripheral surface of the lower holding portion 6 </ b> B. It is fixed.

  On the other hand, the long handle shaft 5 is connected to the lower split portion 5B so that the lower split portion 5B and the upper main portion 5A are linked in the rotational direction. A pin 94 into which the lower end is fitted is locked in the lateral direction. Although not shown in the drawing, a U-shaped notch that fits into the pin 94 is formed at the lower end of the upper body portion 5A. The upper and lower holding portions 6A and 6B can be fixed with a knob screw 89 so as not to rotate.

  It should be noted that the upper and lower handle shafts may be connected by other methods, for example, by combining both ends, so that the assembly by the square grooves and the square projections or the connection using the splines may be performed.

  FIG. 8 is a plan view showing a state in which the steering device 1 for a guardian of the present invention is attached to the infant car 100.

  An infant car 100 shown in FIG. 8 has a body 101 mounted on a chassis (not shown), and a seat 103 is mounted in a large opening 102 provided in the center of the body 101. A steering handle 104 is provided in front of 103.

  An operation arm 108 for operating a link 107 for steering the front wheels 106 and 106 is projected from the lower end portion of the handle shaft 105 that supports the steering handle 104.

  Further, a pedal 110.110 is supported by a crankshaft 111 at the front lower side of the seat 103, and a belt sprocket 112 is attached to the crankshaft 111, and behind the belt sprocket 112, The axles 114 of the rear wheels 113 and 113 are located, and a belt sprocket 115 is mounted on the axles 114.

  A belt 116 is hung between the belt sprockets 112 and 115, and the belt 116 is tensioned by a tension pulley 117 to transmit crank rotation by the pedals 110 and 110 to the rear wheels 113 and 113. By reducing the tension of the belt 116 caused by the belt 116, the belt 116 has a clutch function for interrupting power transmission.

  In the steering apparatus 2 of the present invention, the guardian operates the guardian handle 4 from the rear of the infant vehicle 100 to rotate the handle shaft 105, and the brake lever 90 operates to operate the rear wheels 113, The brake disc 118 provided on the axle 114 of 113 is braked, and the tension pulley 117 is operated by operating the lever 119. When the guard steering device 1 is used, the pedals 110, 110 and the crankshaft 111 are operated. Protects the infant's feet in such a way that they do not interlock.

  The steering shaft 5 of the steering apparatus 2 shown in FIG. 9 shows a divided structure according to another embodiment that can be attached and detached at the middle portion thereof, and FIG. 10 shows that the main body portion 5A of the upper handle shaft 5 is removed. FIG. 11 is a front sectional view showing a connecting portion between a lower-side split portion 5B and an upper-side main body portion 5A constituting the handle shaft 5. FIG. .

  As shown in FIGS. 9 and 10, the upper end portion of the lower portion of the handle shaft 5 has a length shorter than the length that reaches between the front portions of the left and right saddle stays 81, 81. The lower part of the connection pipe X for connecting the upper body part 5A is mounted on the outer peripheral surface of the upper part.

  The lower portion of the divided portion 5B is positioned between the hanger lug (bottom bracket lug) 84 and the left and right chain stays 85, 85, and is supported by being attached to the hanger lug 84 by welding. X is formed so as to protrude slightly rearward from between the front portions of the left and right saddle stays 81, 81.

  A cap R is attached to the vicinity of the upper end of the connection pipe X to prevent rainwater or dust from entering from the opening at the upper end of the connection pipe X when the upper body portion 5A is removed. As shown in FIG. 9, when the upper body portion 5A is fitted into the connection pipe X and both are connected, the cap R removed from the opening is connected to the connection pipe X. It is comprised in the state supported by the ring part fitted.

  As shown in FIG. 11, the lower part 5B constituting the handle shaft 5 and the upper part 5A are connected to the lower part of the upper part 5A into the connecting pipe X. The two pins 87 and 87 urged by the U-shaped spring S from the two opposite sides in the main body 5A on the upper side are opened at two locations formed in the connecting pipe X. This is done by projecting further outward from the holes 57a, 57a. With this construction, when the upper body portion 5A is rotated in either the left or right direction, the wire of the lower split portion 5B The upper part of the operation unit case is linked together.

  When removing the upper body portion 5A from the inside of the connection pipe X, the body portion 5A is moved upward with the tip portions of the two pins 87 and 87 being pushed back by the fingertip or the tip of a screwdriver. When pulled, the main body 5A can be extracted from the connecting pipe X very easily.

  Then, as shown in FIG. 9 and FIG. 10, when the middle part of the brake wire 68 of the guardian's brake is divided and the divided part is connected by the joint 99, Easy to attach and detach.

FIG. 1A is a side view showing an infant bicycle equipped with a guardian steering device according to a first embodiment of the present invention. FIG. 1B is a plan view of the main part showing the guardian's handle. FIG. 1C is a rear view of the guard handle. 2A is a side cross-sectional view showing an enlarged view of the rear wire operation unit case located on the lower side of the holding unit. FIG. 2B is a plan sectional view of the same. 3A is a side cross-sectional view showing the front wire operation unit case in an enlarged manner. FIG. 3B is a plan sectional view of the same. FIG. 4 is a side view of an essential part showing a structure in which a steering device for a guardian according to the present invention is attached to an infant bicycle. FIG. 5 is a plan view showing a state in which the support members are mounted on the left and right saddle stays in the infant bicycle. FIG. 6 is a plan view showing a state in which the lower part of the holding unit of the guardian steering device is mounted between the front ends of the hanger lug of the infant bicycle and the left and right chain stays. FIG. 7 is a side view of the same. FIG. 8 is a plan view showing a state in which the steering device for a guardian with a brake according to the present invention is attached to an infant car. FIG. 9 is a side view of a main part showing a bicycle for an infant equipped with a steering device for a guardian according to a second embodiment in which the long handle shaft of the steering device for a guardian of the present invention is detachable in the middle of the shaft. It is. FIG. 10 is a side view of the main part of the infant bicycle showing a state in which the main body of the long handle shaft on the upper side is removed. FIG. 11 is a front cross-sectional view showing a connecting portion between the lower divided portion and the upper main body constituting the handle shaft.

Explanation of symbols

50 Vehicles for infants (infant bicycles)
100 Infant Vehicle (Infant Car)
DESCRIPTION OF SYMBOLS 1 Steering device for guardian of infant vehicle 4 Handle for guardian 5 Long handle shaft 5A Upper body part 5B Lower part split part 51 Handle shaft for infant 53 Front wire operation part case 54 The other wire Operation part X Connection pipe 57a Open hole 6 Holding part 7 Rear wire operation part case 7A Upper case 7B Lower case 18, 19 Push-pull wire 20, 21 Outer 87 Pin S Spring

Claims (4)

A long handle shaft provided with a guardian handle at the upper end, a holding portion that holds the lower portion of the long handle shaft in a posture toward the rear upper side of the infant vehicle, and a rear wire provided on the holding portion An operation unit case, a front wire operation unit case provided on the handle shaft of the infant vehicle, and two push-pull wires respectively connected to the front and rear wire operation unit cases,
In the rear wire operation part case , there is provided one wire operation part that rotates in conjunction with the long handle shaft, and one end part of the outer side of the push-pull wire on the left and right sides of the side wall of the case. While the other wire operation part is provided in the front wire operation part case , the other end part of the outer part of the push-pull wire is supported on the left and right sides of the side wall of the case, respectively.
When the long handle shaft and the one wire operation part are rotated by the operation of the guard handle, the other wire operation part is rotated via the push-pull wire . In the steering system for guardians of vehicles,
The rear wire operation part case is composed of an upper case and a lower case that are divided into upper and lower parts, and the upper case holds the long handle shaft in a state where the long handle shaft is inserted through an opening formed on the upper surface. The lower case is detachably attached to the lower end portion of the long handle shaft together with the one wire operation portion, and is rotated together with the long handle shaft. A steering device for a guardian of a vehicle for infants, characterized in that it is configured to do so. 2. The steering device for a guardian of an infant vehicle according to claim 1 , wherein the long handle shaft is configured to be vertically splittable so that the upper part can be removed while leaving the lower part. The long handle shaft is attached and detached by projecting two pins urged by U-shaped springs into two openings in the exterior connecting pipe from the two opposite sides in the lower end. The steering device for a guardian of an infant vehicle according to claim 2 , wherein the steering device is configured in a possible structure. An infant vehicle comprising the infant vehicle guardian steering device according to any one of claims 1 to 3 .

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