JP3062591U - Infant tricycle - Google Patents

Abstract

(57) [Summary] [Problem] To provide an infant tricycle equipped with a brake device that enables an attendant operating a push rod to stop the movement of the tricycle with a simple operation and that is fully considered with respect to safety. A brake rod 11 is operated by a stepping operation and penetrates between radial stopper blades 10 formed on a wheel 5a of a rear wheel 5, and the stopper blade 10 abuts and engages with a brake rod 11. As a result, the rotation of the rear wheel 5 stops. Since the stopper blade 10 is formed so as not to protrude from the outer surface of the wheel 5a, there is little possibility that the leg is caught between the wheel 5a and the brake rod 11.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an infant tricycle, and more particularly to an improvement in an infant tricycle provided with a push rod behind the saddle and equipped with a brake mechanism for stopping rotation of a rear wheel by stepping on the foot.

[0002]

[Prior art]

 The age range for children's tricycles is from one and a half years to about three years old. At about two years old, they look in the direction they want to go, hold their steering wheel, steer their hands, and kick the ground with their feet to advance. It is general. By doing so, you will acquire complex motor skills that allow vision, hand operation and foot movement to cooperate. Eventually, if the pedals can be lifted separately on the left and right, they will be able to strengthen their legs more than walking. However, when the infant is first placed on a tricycle, the right and left feet do not reach the ground, depending on the age and size of the body, and therefore it is impossible to kick the ground with the feet as described above. For this reason, the traveling (moving) of the infant tricycle is generally carried out by an accompanying mother or the like (guardian) pushing the tricycle.

[0003] In this operation of pushing a tricycle, a mother or the like stands beside the tricycle, and hands are guided to one side of a handle of the tricycle to guide the vehicle. In this case, the mothers are lined up next to the tricycle. Therefore, the direction of travel is restricted and the mother standing beside the tricycle must bend down, forcing her to take a very cramped posture. For this reason, an infant tricycle with a hand push bar attached to the rear of the saddle was developed to allow the accompanying mother and others to push the tricycle in an easy posture and to ensure the safety protection of the infant riding the tricycle. Has been used.

[0004] The push rod attached to the rear of the saddle includes a push rod separately formed for a backrest disposed behind the saddle, which is attached later, and a push rod extended by extending the backrest and the push rod integrally. There are some that are equipped, but both types are very convenient because the attendant can stand behind the tricycle, push the pushrod, and watch the infant from behind. However, on downhills, etc., the hand may be moved simply by putting its hand on it, and if this movement is to be stopped, the handwheel must be firmly grasped to prevent the tricycle from moving. However, it is very difficult for a mother or the like to perform the above operations.

[0005]

[Problems to be solved by the invention]

 Accordingly, the applicant of the present application has proposed an infant tricycle equipped with a brake mechanism that allows an attendant operating such a push rod to stop the movement of the tricycle with a simple operation. An infant tricycle provided with a brake mechanism for stopping the rotation of the rear wheel by a stepping operation was first provided and filed (Japanese Patent Application No. 10-68080). Although this infant tricycle has the remarkable effect that the attendant who pushes and pushes the pushrod can surely stop the traveling of the tricycle by a simple stepping operation, there is room for improvement in the safety of the brake mechanism. I was

[0006] The present invention has been made in view of the above-described conventional circumstances, and a purpose thereof is to provide a brake device that allows an attendant operating a push rod to stop the movement of a tricycle by a simple operation. Another object of the present invention is to provide an infant tricycle that further improves the previously proposed infant tricycle provided by the applicant of the present invention and that further improves safety.

[0007]

[Means for Solving the Problems]

 The technical measures taken by the present invention in order to achieve the above object are a tricycle for infants provided with a push rod at the rear of the saddle and equipped with a brake mechanism for stopping the rotation of the rear wheel by stepping on the pedal. A rear wheel having radially arranged stopper blades on the outer surface of the wheel, a brake rod for engaging and disengaging the stopper blade, and a foot operating means for engaging and disengaging the brake rod with the stopper blade. The stopper blade is provided in a recess provided at the center of the wheel so as not to protrude from the outer surface of the wheel.

According to the above means, the brake rod is operated by the stepping operation, and penetrates between the radial stopper blades formed on the wheel of the rear wheel, and the stopper blade abuts and engages with the brake rod. This stops the rotation of the rear wheels. Since the stopper blade is formed so as not to protrude from the outer surface of the wheel, there is little possibility that the leg is caught between the wheel and the brake rod.

As the above-mentioned brake mechanism, there are a structure in which the brake is applied to the left and right rear wheels at the same time, and a structure in which the brake is applied to the left and right rear wheels separately. When the brakes are applied to the left and right rear wheels at the same time, a reliable braking effect can be obtained with a simple stepping operation. If the brakes are applied separately to the left and right rear wheels, a braking effect can be obtained by stepping on only one side, and quick response in an emergency can be expected.

The above-mentioned brake mechanism has a structure that is attached to a tricycle later, and a structure that is integrally assembled to a frame of the tricycle. In the case of a structure that can be retrofitted to a tricycle, the brake mechanism can be easily retrofitted, and the brake mechanism can be replaced or removed arbitrarily. In the case of a structure that is integrated with the tricycle frame, the brake mechanism can be formed compactly.

The type of the brake mechanism includes a type in which a brake rod pivots in a radial direction with respect to the axis of the left and right wheels by a stepping operation to engage and disengage with a wheel, and a type in which the left and right wheels protrude and retract in the width direction. And disengage from the wheels.

As a mode of the brake mechanism having a structure in which the left and right rear wheels are simultaneously braked, for example, a rear wheel in which stopper blades are radially arranged on the outer surface of the wheel, a brake rod fitted and removed between the stopper blades, A configuration is provided in which a foot operation rod is provided for fitting and removing the brake rod between the stopper blades, and the brake rod is formed continuously at both ends of the foot operation rod. Further, if the brake unit having the brake rod and the foot operation rod is configured to be detachably attached to a step attached to the rear part of the vehicle body frame, a rear-mounted type in which the brakes are simultaneously applied to the left and right rear wheels. Brake mechanism.

[0013] As an embodiment of the brake mechanism for separately applying a brake to the left and right rear wheels, for example, for a left and right rear wheel having stopper blades, a brake rod fitted between the stopper blades is attached to a foot operation plate. There is a configuration in which the stepping operation plate is integrally formed and the stepping operation plate is vertically rotatably mounted on both side mounting portions of the step at the rear portion of the vehicle body frame. When formed in this manner, unlike a case where a foot operation plate is attached to a wheel, for example, there is no inconvenience that the step operation is difficult to be performed on a running tricycle, and the simple step operation is reliably performed even on a running tricycle. A braking effect can be obtained.

The push rod of the infant tricycle to which the present invention is applied is attached to a backrest frame at the rear of the saddle by a detachably attached substantially portal-shaped push rod. The backrest frame itself may be extended upward to integrally form a push rod. Further, the infant tricycle may have a footrest plate on which a rider can rest his or her feet, which is attached to the vehicle body frame by hanging.

[0015]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 5 show an infant tricycle provided with a brake mechanism having a structure in which brakes are simultaneously applied to left and right rear wheels by operation of a stepping operation means. In the tricycle itself, a handle frame 4 on which a front wheel 2 and a pedal 3 are mounted is attached to a front part of a body frame 1 so as to be rotatable left and right, and a rear wheel 5 is attached to a rear part of the body frame 1 via a rear axle 5 '. A saddle 6 is mounted on the vehicle body frame 1 horizontally between the front wheels 2 and the rear wheels 5 and is positioned between the front wheels 2 and the rear wheels 5. 7 is nowadays well-known, which is mounted upright.

The backrest frame 7 is removably connected with a push rod 8 formed substantially in the shape of a gate so that an operation of pushing a tricycle can be easily performed, and the rear wheel is provided. A step-type brake mechanism A for stopping the rotation of the wheel 5 is mounted on a step 9 which is horizontally mounted and fixed to the rear portion of the vehicle body frame 1.

The brake mechanism A has stopper blades 10 formed radially around bearing portions of wheels 5 a supporting rear axles 5 ′ of left and right rear wheels 5, and fitted between the stopper blades 10. And a brake unit A 'having a brake rod 11 to be removed. The brake unit A' is detachably attached to the lower surface of the step 9.

The brake unit A ′ includes a brake case 12 formed of a synthetic resin material, and a foot-operating portion (foot-operating means) 11 which is supported by the brake case 12 and is bent in a substantially crank shape in plan view. ', A fixing member 13 for supporting the brake rod 11 so as to be able to swing up and down with respect to a brake case 12, a direction in which the brake rod 11 is engaged with the stopper blade 10, and a brake rod. And a spring 14 for urging the brake rod 11 out of the stopper blade 10. The brake rod 11 further supports the brake rod 11 on a brake case 12 and an auxiliary member for extending the spring 14. The rod 15 is welded and fixed, and this auxiliary rod 15 is clamped and held by the fixing member 13 to the brake case 12. Thus, the brake rod 11 is held by the brake case 12.

The both ends of the brake rod 11 penetrate outwardly from both sides of the brake case 12 and are located outside the radial end of a stopper blade 10 formed on the rear wheel 5. When the stepping operation portion 11 ′, which is integrally protruded rearward from the rear surface of the brake case 12, is pressed down, the brake rod 11 rotates about the auxiliary rod 15, and both ends of the brake rod 11 are turned upward. The rotation of the rear wheel 5 is stopped by rotating and fitting between the radially formed stopper blades 10.

The stopper blade 10 is provided in a concave portion 5b provided in the center of the wheel 5a, and is formed so as not to protrude from the outer surface of the wheel 5a. That is, the concave portion 5b is formed with a depth such that the end portion of the stopper blade 10 does not protrude to the outer surface of the wheel 5a, and the stopper blade 10 is formed so as to be buried in the concave portion 5b.

The structure in which the brake unit A ′ is fixedly fixed to the lower surface of the step 9 has a structure in which one side of the holding plate 16 is pivotally supported by pins 17 on the upper part on both sides in the width direction of the brake case 12 so as to be able to swing up and down. The other side of the presser plate 16 projects in the opposite direction across the brake case 12 in the front-rear direction, and its end is fastened and fixed with a protruding piece 12 ′ formed on the front side of the brake case 12 and a screw nut 18. . Therefore, to fix the brake unit A ', the brake case 12 of the brake unit A' is brought into contact with the lower surface of the step 9 from below, and the presser plate 16 is rotated to be mounted on the upper surface of the step 9, and the presser plate 16 is projected forward from the front edge of the step 9, the projected portion is superimposed on the upper surface of the protruding piece 12 ′ of the brake case 12, and both are fastened and fixed with screws and nuts 18. Complete.

In the above-described embodiment, both sides of the brake rod 11 are simultaneously fitted and engaged between the stopper blades 10 of the left and right rear wheels 5 to stop the rotation of the left and right rear wheels. However, it is also possible to stop the rotation of the rear wheels of the present invention by independently stopping the left and right rear wheels, respectively. This embodiment will be described below with reference to FIGS.

The structure is such that mounting portions 18 are formed integrally on both sides in the width direction of the step 9 mounted on the rear portion of the vehicle body frame 1 so as to be engaged with and fixed to the bifurcated rod portion 1 ′ of the vehicle body frame. A stepping operation plate (stepping operation means) 20 having a brake rod 19 integrally formed on a side surface thereof is rotatably supported by a pin 21 on a pin 18.

Further, between the foot operation plate 20 and the mounting portion 18, there are provided engaging means 22, 22 ′ having irregularities for making the vertical movement of the foot operation plate 20 up and down. As a result, a state where the brake is applied by stepping on the foot operation plate 20 and the brake rod 19 is fitted between the stopper blades 10 to apply a brake, and a state where the foot operation plate 20 is flipped up and the brake is released are held respectively. It has become so.

Also in this example, it goes without saying that the stopper blade 10 is provided in the concave portion 5b provided in the center of the wheel 5a so as not to protrude from the outer surface of the wheel 5a.

Reference numeral 23 shown in FIGS. 1 and 2 denotes a step of placing a foot on which a child riding a tricycle puts a foot, and a shaft 3 ′ on which a pedal 3 for driving the front wheel 2 is mounted, a front wheel 2, When is connected, the pedal 3 rotates together with the rotation of the front wheel, so that the foot is placed on the foot placing step 23 so that the foot does not hit the rotating pedal. The shaft 3 'on which the pedal 3 is mounted and the front wheel 2 may be connected by a releasable connecting means without being fixedly connected. When traveling by pushing the push rod 8, the connecting means is separated and separated. When the wheel 2 rotates, the pedal 3 does not rotate, and in this case, the foot may be placed on the pedal.

The brake mechanism shown in the above-described embodiment is a form in which the brake rod moves radially around the axle and thereby fits between the stopper blades, and the brake rod moves in the axial direction thereof. Then, the stopper blades may be fitted between the stopper blades.

[0028]

[Effect of the invention]

 According to the first to fifth aspects of the present invention, the attendant who pushes the push rod of the tricycle can surely stop the traveling of the tricycle by a simple stepping operation. In addition, since there is little possibility that the leg is caught between the wheel and the brake rod, it is possible to provide a tricycle for an infant in which safety is sufficiently considered.

When the brakes are applied to the left and right rear wheels at the same time, a highly reliable braking effect can be obtained by a simple stepping operation. In the case where the brakes are separately applied to the left and right rear wheels as in claim 4, a braking effect can be obtained by stepping on only one side, and a quick response in an emergency can be expected.

[0030] When the brake mechanism is configured to be retrofitted to the tricycle as in claim 3, the brake mechanism can be easily retrofitted, and the brake mechanism can be replaced or removed arbitrarily. As a result, the infant becomes larger and can run on his own pedal, and when he / she can apply the brakes with his / her feet on the ground, the brake unit can be removed to reduce the weight.

[0031] As a mode of a brake mechanism for separately applying brakes to the left and right rear wheels, a brake rod which is fitted and detached between the stopper blades is provided for the left and right rear wheels having the stopper blades. When the foot-operating plate is formed integrally with the foot-operating plate, and the foot-operating plate is mounted on both side mounting portions of the step at the rear of the vehicle body frame so as to be vertically rotatable, for example, a structure in which the foot-operating plate is mounted on wheels. As described above, there is no problem that the stepping operation becomes difficult on the running tricycle, and the braking effect can be reliably obtained by the simple stepping operation on the running tricycle. Further, since the brake mechanism has a structure integrally assembled to the frame of the tricycle, the brake mechanism can be formed compact.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an embodiment of an infant tricycle according to the present invention.

FIG. 2 is a cross-sectional plan view taken along the line (2)-(2) in FIG.

FIG. 3 is an enlarged sectional view taken along the line (3)-(3) of FIG. 2;

FIG. 4 is a perspective view showing a brake mechanism.

FIG. 5 is an exploded perspective view of FIG. 4;

FIG. 6 is a perspective view showing another example of the brake mechanism.

FIG. 7 is an enlarged side view of FIG. 6;

[Explanation of symbols]

 A: Brake mechanism A ': Brake unit 1: Body frame 5: Rear wheel 5a: Wheel 5b: Concave portion 6: Saddle 8: Push rod 9: Step 10: Stopper blade 11: Brake rod 11': Stepping operation unit (stepping operation Means) 19: Brake rod 20: Foot operation plate (foot operation means)

Claims (5)

[Utility model registration claims] 1. An infant tricycle equipped with a push rod at the rear of the saddle and equipped with a brake mechanism for stopping rotation of a rear wheel by a stepping operation, wherein the brake mechanism comprises:
A rear wheel having radially arranged stopper blades on an outer surface of the wheel, a brake rod for engaging and disengaging the stopper blade, and a foot operating means for engaging and disengaging the brake rod with the stopper blade; and the stopper The infant tricycle, wherein the blades are provided in recesses provided in the center of the wheel so as not to protrude from the outer surface of the wheel. 2. The infant tricycle according to claim 1, wherein said brake mechanism has a structure in which brakes are simultaneously applied to left and right rear wheels by operation of a stepping operation means. 3. The brake mechanism, wherein stopper blades are radially arranged on the outer surface of the wheel, a wheel, a brake rod fitted and removed between the stopper blades, and a foot pedal for fitting and removing the brake rod between the stopper blades. 3. The infant tricycle according to claim 2, further comprising a brake unit having an operating rod, wherein the brake unit is detachably attached to a step attached to a rear portion of the vehicle body frame. 4. The infant tricycle according to claim 1, wherein the brake mechanism has a structure in which brakes are separately applied to left and right rear wheels by operating a stepping operation means. 5. A brake mechanism according to claim 1, wherein said brake mechanism is independently mounted on left and right rear wheels having stopper blades, wherein a brake rod fitted between said stopper blades is integrated with a foot operation plate. 5. The infant tricycle according to claim 4, wherein the foot operation plate is vertically rotatably mounted on mounting portions on both sides of a step mounted on a rear portion of the vehicle body frame.