JPH0541588U - Axle support structure for children's vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] The cushioning action of a child car is performed inexpensively and safely. A rear wheel drive child vehicle in which a rear wheel axle 5 is rotated by a footing rod 6 via a crank mechanism 7 has a rear wheel axle 5 supported by a support rod 13. The support rod 13 is made of an elastic material made of synthetic resin, and its length direction extends along the body frame pipe P so as to gradually extend away from the tip end. The support rod 13 bends to provide a cushioning action, but at the time of the action, the support rod 13 gradually abuts the vehicle body frame pipe P from the fixing point at one end toward the tip, so that the spring constant becomes large and the cushioning action according to the load is provided. Eggplant

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an axle support structure for a child car and a wheel support structure for a baby carriage.

[0002]

[Prior art and its problems]

 Conventionally, children's cars have not been provided with a cushioning mechanism. This was due to the cost and safety aspects of the product. That is, a shock-absorbing material having a large amplitude, such as a coil spring, rather deteriorates running stability due to the amplitude.

In addition, as described in Japanese Utility Model Publication No. 44-5474 and the like, a cushion mechanism using a coil spring has been used for a long time in baby carriages. However, the use of the coil spring requires an auxiliary rod and the like, which is problematic in terms of cost.

In view of the above points, the present invention has an object of inexpensive and safe buffering.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, in the first invention, a rear wheel axle is provided in the rear portion of a horizontal body frame, and a rear wheel axle is connected to a foot rod through a crank mechanism. In the rear wheel axle support structure, the rear wheel axle is supported by the tip of a support rod fixed to the vehicle frame at one end, and the support rod is made of a synthetic resin elastic material and has a long length. It is configured so that the sagittal direction gradually extends away from the body frame toward the tip.

According to a second aspect of the invention, in a baby carriage such as a stroller, a wheel is attached to a vehicle body frame through a supporting rod, and the supporting rod is made of an elastic material made of synthetic resin, and one end of which is the above-mentioned one. The wheel is fixed to the vehicle body frame, the wheel is provided at the other end, and the lengthwise direction is toward the other end and gradually extends away from the vehicle body frame P.

[0007]

[Action]

 With the axle / wheel support structure configured as described above, when a child rides, the load is supported by the support rod bending to a required position. At this time, the amount of deflection changes depending on the weight of the child, but as the support rod flexes, the support rod gradually abuts on the vehicle body frame from the fixed point at one end toward the tip (wheel side), and the abutment point becomes the fulcrum. For this reason, the length of the supporting rod as an elastic material is gradually shortened and the spring constant is increased, so that a cushioning action corresponding to the weight of the child is performed.

Further, in a child vehicle, the rear wheel axle is pushed back and forth by the crank mechanism, but the support rod is almost in the forward and backward direction along the horizontal body frame. The pulling force acts in the axial direction and has a sufficient drag force, which does not hinder the operation of the crank mechanism.

[0009]

[Embodiment 1] This embodiment relates to a child vehicle, and as shown in FIGS. 2 and 3, a vehicle body frame pipe P is provided around a vehicle body B, and the vehicle body frame pipe P A front wheel 1 is provided on the front part of the vehicle via a tie rod 4, an axle 8, a knuckle arm 9, etc., and a rear wheel 2 is provided on the rear part of the vehicle via an axle 5.

A steering wheel 3 is provided upright on the front portion of the vehicle body B. When the steering wheel 3 is turned, the direction of the front wheel 1 is changed by a known mechanism such as a tie rod 4. Further, an L-shaped rod 10 is swingably attached to the front wheel axle 8 in the middle thereof, one end of which is locked to the tie rod 4 and the other end of which is connected to a hand push handle 12 through a connecting rod 11. There is. This hand-pushing handle 12 is rotatably provided on the vehicle body B. When the parent holds and pushes the automobile, the handle 12 is rotated to move the tie rod 4 via the connecting rod 11 and the L-shaped rod 10 to move the front wheel. 1, 1 changes direction.

As shown in FIG. 1, the rear wheel axle 5 is supported by a support rod 13, and the support rod 13 is made of a synthetic resin elastic material such as nylon 66 and has an inverted convex section. The axle 5 is penetratingly supported at the tip. The base of the support rod 13 is screwed to the body frame pipe P, and the length direction of the support rod 13 gradually extends away from the body frame pipe P toward the tip. It bends very much as shown by the chain line. During this bending action, the support rod 13 gradually abuts the vehicle frame pipe P from the fixed end (screw end) toward the tip as it bends, and the abutment point serves as a fulcrum. For this reason, the length of the supporting rod 13 as the elastic material becomes gradually shorter and the constant becomes larger.

A foot rod 6 is connected to the rear wheel axle 5 via a crank mechanism 7. By swinging the foot rod 6 as indicated by an arrow, the rear wheel 2 rotates and travels via the axle 5. It At this time, the rear wheel axle 5 is pushed back and forth by the crank mechanism 7, but since the support rod 13 is in the front-rear direction along the horizontal body frame pipe P, the support rod 13 is pulled almost in the axial direction. The pushing force acts and has a sufficient drag force, and the action of the crank mechanism 7 is not hindered at all.

When the body frame pipe P is not provided, the axles 5 and 8 are directly attached to the vehicle body B 1. Therefore, it goes without saying that the "body frame" referred to in the "claim for utility model registration" includes not only the body frame pipe P but also the vehicle body B. Further, the support structure of the axle 5 by the support rod 13 can also be adopted for supporting the front wheel axle 8. Further, as shown in FIG. 4, the supporting structure may be formed by bending the frame pipe P side of the vehicle body.

[0014]

Second Embodiment This embodiment relates to a stroller, in which a rear wheel 20 is supported by a supporting rod 13 and attached to a vehicle body frame pipe P as shown in FIG. This support structure may be a structure in which the pipe P shown in FIG. 4 is bent. Further, the front wheel 21 side may have the same support structure. The operation of the support rod 13 is similar to that described above.

[0015]

[Effect of the device]

 The present invention is constructed as described above, and has a simple structure to provide a cushioning action, and the cushioning spring constant also changes according to the weight of the child to provide an appropriate cushioning action.

[Brief description of drawings]

FIG. 1 is an enlarged view of a main part of an embodiment.

FIG. 2 is an overall schematic view of the same embodiment.

FIG. 3 is an external view of the same embodiment.

FIG. 4 is an enlarged view of a main part of another embodiment.

FIG. 5 is an external view of another embodiment.

[Explanation of symbols]

 1, 21 front wheels 2, 20 rear wheels 3 handle 4 tie rod 5 rear wheel axle 6 foot rod 7 crank mechanism 8 front wheel axle 9 knuckle arm 10 L-shaped rod 11 continuous rod 12 handle 13 support rod B vehicle body P body frame pipe

Claims (2)

[Scope of utility model registration request] 1. A rear wheel axle 5 of a child's vehicle in which a rear wheel axle 5 is provided at a rear portion of horizontal body frames B and P, and a foot rod 6 is connected to the rear wheel axle 5 through a crank mechanism 7. In the structure described above, the rear wheel axle 5 is supported by the tip of a support rod 13 fixed to the vehicle body frames B and P at one end, and the support rod 13 is made of an elastic material made of synthetic resin and has a long length. Body direction B toward the tip,
A rear axle support structure for a child's vehicle, which is characterized by gradually extending away from P. 2. A wheel 20 is attached to a body frame P via a support rod 13, and the support rod 13 is made of an elastic material made of synthetic resin, and one end thereof is fixed to the body frame P.
A wheel support structure for a baby carriage, wherein the wheel 20 is provided at the other end, and the longitudinal direction is toward the other end and gradually extends along the vehicle body frame P.