JPH0728071Y2 - Infant tricycle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a tricycle for infants.

(Prior Art) In a conventional infant tricycle, a handle frame having front wheels attached thereto is rotatably connected to a body frame, whereby the traveling direction can be freely changed by rotating the handle frame. ing.

(Problems to be Solved by the Invention) In the above-described infant tricycle, since the handle frame freely rotates, the hand push rod is attached to the rear portion of the body frame, and when the push rod is pushed to drive the tricycle, the front wheel is moved. The attached handle frame swings in the left and right directions to meander and run, which makes it very difficult to run straight.

The present invention has been made in view of the problems of the prior art as described above, and its purpose is to automatically move straight even if the handle frame to which the front wheel is attached swings in the left-right direction. To provide a tricycle for infants that can return straight to and drive straight ahead.

(Means for Solving the Problems) In order to achieve the above object, the infant tricycle according to the present invention has a bearing frame for mounting a handle fixed to a vehicle body frame, and a coil spring provided outside the support insertion tube of the bearing frame. While fitting both, crossing both ends of the spring in an X shape, and fixing the bearing frame to the handle frame provided with the other front wheel,
The bearing frame is provided with engaging projections to be fitted between both ends of the coil spring, the bearing frame side of the handle frame is combined with the bearing frame of the vehicle body frame, and is rotatably connected by a support shaft.

The spring force of the coil spring is set so that the handle frame is easily rotated by the force of an infant riding on a three-wheeled vehicle so that the direction change is not hindered.

(Operation) According to the above-mentioned means, the engaging projection provided on the bearing frame fixed to the handle frame is fitted into the X-shaped cross formed by both ends of the coil spring mounted on the bearing frame on the vehicle body frame side. Therefore, when the handle frame rotates, one of the side ends of the coil spring collides with the engaging protrusion to accumulate elastic force, and when the external force rotating the handle frame is removed, the coil spring elastically elapses. It is returned to the straight state by force.

(Effects of the Invention) Since the infant tricycle of the present invention is configured as described above, when the handle frame is rotated in the left-right direction, the handle frame is always returned in the straight traveling direction by the action of the coil spring and the engaging projection. .

Therefore, when the three-wheeled vehicle is pushed by the hand push rod attached to the rear portion to travel, the front wheels are always maintained in the straight traveling direction, and thus the straight traveling can be stably performed.

Also, the spring force of the coil spring that automatically returns the handle frame in the straight-ahead direction is such that the handle can be easily rotated by the force of the infant, so even if the infant rides and runs independently. It does not hinder the change of direction and can be used with peace of mind.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In a tricycle for infants, a handle frame 2 having a front wheel 3 attached to a front portion of a body frame 1, and a rear portion of a rear portion of the body frame 1. The wheel 4 is rotatably attached, a saddle 5 is attached in the middle of the body frame 1, and a backrest frame 6 is installed upright behind the turtle 5 and is mounted on the backrest frame 6. A push rod 7 is attached.

The handle frame 2 is attached to the vehicle body frame 1 by fixing the bearing frame 8 having a U-shaped cross section to the front portion of the vehicle body frame 1 by welding the vertical piece portion 8a to the upper and lower horizontal piece portions 8b and 8b.
Through holes 10a and 10b through which the support shaft 9 is inserted are formed in c, and the through hole 10b formed in the lower horizontal piece portion 8c is made of synthetic resin so as to have a larger diameter than the upper through hole 10a. The bush 11 is fitted.

A coil spring 12 is fitted on the outside of the bush 11 protruding into the bearing frame 8.

The coil spring 12 is a bush 11 made of a metal wire.
Of the wire rod, which is fitted to the outer side of the wire and is wound in a circular shape, and which partially forms a straight portion 12a which comes into contact with the vertical piece portion 8a of the bearing frame 8 and serves as a rotation stopper, and both ends 12b and 12c of the wire rod. Is the straight part 12a
And X-shaped on the opposite side.

On the other hand, the handle frame 2 to which the front wheel 3 is attached has the bearing frame 8
A bearing frame 13 having a U-shaped cross section that is fitted to the outside of the bearing frame 13 is fixed, and through holes 14a and 14b through which the support shaft 9 is inserted are formed in upper and lower horizontal pieces 13a and 13b of the bearing frame 13. Together with the lower horizontal piece 13b
On both sides 12b, 12 of the coil spring 12 intersecting with the X shape
The engaging projections 15 that are fitted between c are vertically formed by cutting and raising.

Further, the bearing frame 13 is fixed to the handle frame 2 by screwing, and a semi-circular shape that comes into contact with the outer peripheral surface of the cylindrical cover tube 16 fitted and attached to the bearing frame 8 fixed to the vehicle body frame 1. A receiving plate 17 having a concave portion is fixed to the handle frame 2 by sandwiching it with the bearing frame 13.

Then, the bearing frame 8 covered with the cover tube 16 is fitted between the horizontal piece portions 13a and 13b of the bearing frame 13, and the support shaft 9 is inserted through the through holes of both bearing frames 8 and 13, and The clip 18 is hooked on the protruding portion to prevent the support shaft 9 from coming off, and the assembly of the handle frame 2 is completed.

With the above configuration, when the handle frame 2 is rotated about the support shaft 9, the engagement protrusion 15 provided on the bearing frame 13 abuts the side end 12b or 12c of the coil spring 12 in accordance with the rotation. The coil spring 12 is rotated in the tightening direction. As a result, elastic force is accumulated in the coil spring 12, and when the external force that rotates the handle frame 2 is released, the side end 12b or 12c of the coil spring 12 rotates in the direction in which it returns to its original position. Along with this, the hooking protrusion 15 is also rotated, and the handle frame 2 is automatically returned to its original position, that is, the direction in which the front wheel 3 faces the straight traveling direction.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a side view of a tricycle, Fig. 2 is an enlarged sectional view of a portion surrounded by a circle in Fig. 1, and Fig. 3 is (3)-(Fig. 2). 3) Sectional view along the line, No. 4
The drawing is a sectional view taken along the line (4)-(4) in FIG. 2, and FIG. 5 is an exploded perspective view. In the figure, 1: Body frame, 2: Handle frame 3: Front wheel, 8,13: Bearing frame 9: Spindle 12: Coil spring 15: Engagement protrusion

Claims (1)

[Scope of utility model registration request] A bearing frame for mounting a handle is fixed to a body frame, a coil spring is fitted to the outside of a support insertion tube of the bearing frame, and both ends of the spring are crossed in an X shape, and the other front wheel. The bearing frame is fixed to the handle frame provided with, and the bearing frame is provided with engaging projections to be fitted between the both ends of the coil spring, and the handle frame side bearing frame is combined with the vehicle body frame side bearing frame to form a support shaft. A tricycle for children that is rotatably connected.