JP6952651B2 - Tricycle for infants - Google Patents

Description

The present invention relates to an improvement of an infant tricycle, the present invention relates to an infant tricycle in which the tricycle is folded and stored, the storage space is significantly improved, and parts are shared to save resources.

In many homes such as apartments and high-rise houses, tricycles for infants are stored in the front door of the house or stored at the front door. In addition, every time a baby plays with a tricycle outdoors or in a park, he / she can take it outdoors using an elevator or stairs, or after use, install and store it at the front door, the front door, or the balcony. I'm doing it. In some cases, a tricycle is loaded into the trunk of an automobile or the like and goes out for a vacation.

In such a case, even a tricycle for infants requires a certain amount of storage and storage space, so the entrance and entrance of a house with a limited space should be cramped when entering and exiting the entrance. It also becomes an obstacle. In addition, when a tricycle is stored in the trunk of an automobile together with various kinds of luggage and goes out for a vacation, the bulkiness of the tricycle is often an obstacle. Moreover, when carrying a tricycle, especially when carrying it up and down stairs, it is difficult for young people to carry it in a stable form because it is held in both hands and lifted.

In the past, the applicant has folded the tricycle to save a lot of space for its installation and storage, making it easy to fold it and change its form to the state of use, and to ensure that it is in use. We applied for a folding tricycle equipped with a unique mechanism such as locking it to enable safe use, and obtained a patent right (Patent No. 3361669).

On the other hand, in the conventional tricycle for infants, the operation rod equipped at the rear is pushed to run the tricycle, but the crank shaft of the pedal integrated with the front wheel rotates during running, and the infant placed on the pedal. Since the legs also rotate together, there is a risk of injury, leaving room for improvement in terms of safety. Further, there is known a tricycle for infants in which a footrest step is provided separately from the pedal at the lower part of the vehicle body frame when the child cannot pedal by himself (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-247072

However, in the tricycle for infants disclosed in Patent Document 1, although the interlocking mechanism and the operating rod that become unnecessary as the infant grows up can be removed, the pedal that becomes unnecessary at an early age cannot be pedaled by oneself. Therefore, there is a risk of injury. In addition, it is economically unfavorable to have a pedal and a footrest step that are not used at the same time. The present invention is a folding tricycle that solves the above-mentioned problems. It is economical to remove the pedals at an early age when the pedals cannot be pedaled by oneself and use them as a footrest step to share parts. The purpose is to enhance the effect.

In order to achieve the above object, the infant tricycle according to claim 1 is configured as follows. That is , a handle frame having pedals on the front wheels and left and right rear wheels are attached to the vehicle body frame to which the saddle is attached, one end of the vehicle body front frame is fitted in the front position of the vehicle body frame, and the tip of the vehicle body rear frame is in the intermediate position. Is fitted and connected, and is pivotally installed at the front position of the vehicle body front frame, and can be folded at the front and rear pivot positions of the vehicle body intermediate frame pivotally installed at the vehicle body rear frame and the rear position. In a tricycle for infants, which has a footrest step mechanism used in childhood when it is not possible to pedal on its own in the rear frame of the vehicle body.
The foot-mounting step mechanism is composed of a base frame pivotally installed at the rear position of the vehicle body rear frame and a foot-mounting step base pivotally installed at the tip position of the base frame, and the base frame is located at the rear position. A lock piece is fitted into the two grooves provided to fix the lock piece at two places, one when it is in use and the other when it is not in use, and the footrest step base is fitted to fit the crank shaft of the pedal forward. An insertion hole is provided for inserting the hole and the tip of the crank shaft of the pedal, and a fixing piece is provided at the rear to fix the footrest step base at the corresponding positions when it is used and when it is not used. The feature is that the step base is fixed at the corresponding position during use, and the pedal with the crank shaft removed from the axle of the front wheel is fixed to the base of the foot-mounting step and diverted as the foot-mounting step.

The infant tricycle according to claim 2 is the infant tricycle according to claim 1, and when the infant can pedal by himself / herself, the position corresponding to the footrest step base when not in use. It is characterized by fixing the pedal to the axle of the front wheel, which is fixed to the foot and removed from the base of the footrest step.

The infant tricycle according to claim 3 is the infant tricycle according to claim 1 or 2 , wherein the pedal includes a crank shaft and a fixing ring, and the tip of the crank shaft has a swinging piece. Provided on both sides, a projecting piece and an operation unit are provided at the tip of the swinging piece at a predetermined position, and when the pedal is attached to the insertion hole of the axle of the front wheel or the base of the foot-mounting step, the projecting piece causes the axle or foot-mounting step. It is characterized in that it is fixed to the insertion hole of the base and a fixing ring is inserted from the rear of the swing piece to prevent it from coming off.

In the three-wheeled vehicle for infants of the present invention, the vehicle body front frame is connected to the front position of the vehicle body frame, the vehicle body rear frame is connected to the intermediate position, and the vehicle body front frame and the vehicle body rear frame are connected by the vehicle body intermediate frame. In a three-wheeled vehicle for infants, which is foldable at the front and rear pivotal positions and has a footrest step mechanism attached to the rear frame of the vehicle body, the footrest step mechanism is pivotally installed at the rear position of the rear frame of the vehicle body. It is composed of a base frame and a footrest step base pivotally installed at the tip position of the base frame. The base frame is used and not used by fitting lock pieces into two grooves provided at the rear position. Stoppers are provided at two points to fix the foot, and the footrest step base is provided with a fitting hole for fitting the crank shaft of the pedal and an insertion hole for inserting the tip of the crank shaft of the pedal in the front. A fixing piece was provided at the rear to fix the footrest step base at the corresponding positions when used and when not in use, and at an early age, the footrest step base was fixed at the corresponding position during use and removed from the axle of the front wheel. Since the pedal with the crank shaft is fixed to the base of the footrest step and diverted as the footrest step, parts can be shared and the economic effect can be enhanced.

Further , according to the three-wheeled vehicle for infants of claim 3 , the pedal is provided with a crank shaft and a fixing ring, and the tip of the crank shaft is provided with swinging pieces on both sides, and the protruding piece and the tip are provided at predetermined positions of the swinging piece. When the operation unit is provided and the pedal is attached to the insertion hole of the axle or footrest step board of the front wheel, it is fixed to the insertion hole of the axle or footrest step board by a projecting piece, and the fixing ring is inserted from the rear of the swing piece. Since it is used as a stopper, the pedal can be prevented from coming off easily and safety can be improved.

It is an overall perspective view of the tricycle for infants which concerns on this invention. It is a perspective view of a pedal. It is a perspective view which fixed the pedal to the front wheel. It is a perspective view which showed the foot-mounting step mechanism. It is a perspective view of the main part when the footrest step mechanism is used (a) and when it is not used (b). It is a perspective view which fixed the pedal to a foot resting step base. It is a perspective view of the hole concealment to be inserted after pulling out a pedal. It is an exploded view of the main part of the folding mechanism part of a tricycle for infants. It is operation explanatory drawing of the foot-mounting step at the time of folding a tricycle for infants. (A) is a perspective view of a tricycle for infants equipped with an operating rod at the rear when the child cannot pedal by himself, and (b) is an enlarged view of the tip of the operating rod.

Hereinafter, embodiments of the infant tricycle according to the present invention will be sequentially described with reference to the drawings. First, the overall configuration of the infant tricycle will be described. In FIG. 1, H is a handle frame of a tricycle for infants, and the front wheels R1 are fitted into the lower ends of a pair of left and right handle masts M1 and M2 supported at two upper and lower positions near the middle, and the handle masts M1 and M2 The upper portion is bent in the left-right outer direction, and the handle grips G1 and G2 are fitted and fixed to both ends thereof.

The left and right distances of the handle masts M1 and M2 are fixedly maintained by the intermediate metal fittings pivoted at two places above and below the handle pipe P. D1 and D2 are pedals attached to the axles Q1 and Q2 of the front wheels R1, J1 and J2 are crankshafts, and U1 and U2 are fixed rings. S is a saddle made of hard synthetic resin attached to the vehicle body frame 10, and T is a backrest, which is held by two pillars standing at the rear of the saddle S. N is an accessory case attached to the rear of the infant tricycle, R2 and R3 are rear wheels, and 61 is an operation piece provided behind the saddle S to start the folding operation. In FIG. 10, W is a sunshade, and Z is an operating rod for operating an infant tricycle at an early age when the pedal cannot be pedaled by itself. I is a guard member that prevents an infant sitting on the saddle S from falling when he / she is a child who cannot pedal by himself / herself, and the guard member I is attached to rotating members I1 and I2 attached to the side surface of the backrest T. It is fixed and can rotate upward in the figure.

As shown in FIG. 2, the pedals D1 and D2 are provided with crank shafts J1 and J2 and fixing rings U1 and U2, and the tips of the crank shafts J1 and J2 are provided with swing pieces Y1 and Y2 on both sides and swing pieces Y1. , Y3 and Y4 are provided at predetermined positions of Y2, and an operation unit is provided at the tip of the swinging pieces Y1 and Y2. To fix the pedals D1 and D2 to the front wheels R1, as shown in FIG. 3, the tips of the crank shafts J1 and J2 are fixed to the axles Q1 and Q2 until the projecting pieces Y3 and Y4 of the swing pieces Y1 and Y2 are fixed to the axles Q1 and Q2. Insert the fixing rings U1 and U2 from behind the swing pieces Y1 and Y2 so that they cannot be easily removed.

As shown in FIG. 4, the footrest step mechanism E is composed of a base frame F pivotally installed at the rear position 55 of the vehicle body rear frame 50 and a footrest step base A pivotally installed at the tip position of the base frame F. .. A stopper X that slides back and forth on the base frame F and has a lock piece L on one side is inserted, and two grooves 56 and 57 into which the lock piece L is fitted are provided at the rear position 55 of the vehicle body rear frame 50. In front of the footrest step base A, fitting holes B1 and B2 for fitting the crank shafts J1 and J2 of the pedals D1 and D2 and insertion holes C1 and C2 for inserting the tips of the crank shafts J1 and J2 are provided. A fixing piece K (see FIG. 5) for fixing the footrest step base A at a corresponding position when it is used and when it is not used is provided at the rear.

FIG. 5A is a diagram showing a form when the footrest step mechanism E is used, in which the lock piece L of the stopper X of the base frame F is provided at the rear position 55 of the vehicle body rear frame 50 at two grooves. Of 56 and 57, it is fitted into the groove 56 corresponding to the use and fixed at the position corresponding to the use, and the footrest step base A is fixed to the position corresponding to the use by the fixing piece K provided at the rear.

FIG. 5B is a diagram showing a form when the footrest step mechanism E is not used, and two lock pieces L of the stopper X of the base frame F are provided at the rear position 55 of the vehicle body rear frame 50. Of the grooves 56 and 57, it is fitted into the corresponding groove 57 when not in use and fixed at the corresponding position when not in use, and the footrest step base A is fixed at the corresponding position when not in use by the fixing piece K provided at the rear. do.

FIG. 6 is a diagram showing a form in which the pedals D1 and D2 are fixed to the footrest step base A to form a footrest step when the footrest step mechanism E is used, and is fitted in front of the footrest step base A. The crank shafts J1 and J2 of the pedals D1 and D2 are fitted into the holes B1 and B2, and the swing pieces Y1 and Y2 provided at the tips of the crank shafts J1 and J2 are inserted into the insertion holes C1 and C2 to be provided at predetermined positions. It is fixed to the insertion holes C1 and C2 by the protruding pieces Y3 and Y4, and the fixing rings U1 and U2 are further inserted from behind the swing pieces Y1 and Y2 to serve as a stopper.

Next, the operation of the infant tricycle in childhood when it is not possible to pedal on its own will be described. In that case, even if the front wheels R1 have pedals D1 and D2, they are not used, so the pedals D1 and D2 are removed from the front wheels R1. That is, the fixing rings U1 and U2 fitted in the swing pieces Y1 and Y2 of the crankshafts J1 and J2 are moved, and the operating portions provided at the tips of the swing pieces Y1 and Y2 are picked to release the projecting pieces Y3 and Y4. Then, remove the pull-out pedals D1 and D2 from the axles Q1 and Q2.

Since the footrest step mechanism E is used in childhood when the pedal cannot be pedaled on its own, of the two grooves 56 and 57 provided at the rear position 55 of the vehicle body rear frame 50, the groove 56 corresponding to the use is used. The lock piece L of the stopper X of the base frame F is fitted into the lock piece L and fixed at the position corresponding to the time of use, and the footrest step base A is fixed to the position corresponding to the time of use by the fixing piece K provided at the rear. In that state, the pedals D1 and D2 removed from the front wheels R1 are fixed to the footrest step base A. That is, the crank shafts J1 and J2 of the pedals D1 and D2 are fitted into the fitting holes B1 and B2 provided in front of the footrest step base A, and the swings provided at the tips of the crank shafts J1 and J2 are provided in the insertion holes C1 and C2. The pieces Y1 and Y2 are inserted, fixed to the insertion holes C1 and C2 by the projecting pieces Y3 and Y4 provided at predetermined positions, and the fixing rings U1 and U2 are further inserted from behind the swinging pieces Y1 and Y2 to form a stopper. do.

When the pedal can be pedaled by oneself, the footrest step mechanism E does not need to be used, so the pedals D1 and D2 are removed from the footrest step base A. That is, the fixing rings U1 and U2 fitted in the swing pieces Y1 and Y2 of the crank shafts J1 and J2 are moved, and the operating portions provided at the tips of the swing pieces Y1 and Y2 are picked to release the projecting pieces Y3 and Y4. Then, the crank shafts J1 and J2 are pulled out from the insertion holes C1 and C2, and at the same time, the crank shafts J1 and J2 are pulled out from the fitting holes B1 and B2, and the pedals D1 and D2 are removed from the footrest step base A.

Of the two grooves 56 and 57 provided at the rear position 55 of the vehicle body rear frame 50, the lock piece L of the stopper X of the base frame F is pulled out from the groove 56 corresponding to the use, and fitted into the groove 57 corresponding to the non-use. The base frame F is fixed at a corresponding position when not in use, and the foot-mounting step base A is fixed at a corresponding position when not in use by a fixing piece K provided behind the foot-mounting step base A. In that state, the pedals D1 and D2 removed from the footrest step base A are fixed to the axles Q1 and Q2 of the front wheel R1. That is, when the tips of the crankshafts J1 and J2 are inserted into the axles Q1 and Q2 of the front wheels R1 and fixed to the axles by the projecting pieces Y3 and Y4 provided at predetermined positions of the swing pieces Y1 and Y2, the swing pieces Y1 and Insert the fixing rings U1 and U2 from the rear of Y2 and fix them so that they will not come off easily.

FIG. 7 shows a hole hiding V to be inserted into the shaft hole after the pedals D1 and D2 are pulled out from the axles Q1 and Q2 of the front wheel R1. The hole concealment V is provided with swinging pieces V1 and V2, and is fixed so as not to be easily removed by projecting pieces V3 and V4 provided at predetermined positions of the swinging pieces V1 and V2. The hole concealment V is also used as a hole concealment to be inserted into the insertion holes C1 and C2 after removing the pedals D1 and D2 from the footrest step base A.

The infant tricycle of the present invention can be folded regardless of whether the footrest step mechanism E is used or not, in order to save a large amount of storage space when stored at the front door or the like. FIG. 8 is an exploded view showing the main part of the folding mechanism part, and FIG. 10 is a U-shaped body frame in which both ends are bent at right angles. One end 31 of the front frame 30 of the vehicle body is fitted into the front position 11 on the inner side, and the tip 51 of the rear frame 50 of the vehicle body is fitted into the intermediate position 12, which is foldably connected and supported by bolts and nuts. The vehicle body front frame 30 is formed so as to protrude rearward from the vicinity of the middle of the handle pipe P, and has a stay 32 at which the front 41 of the vehicle body intermediate frame 40 is inserted. The vehicle body rear frame 50 is formed so as to project forward from the middle of the reinforcing pipe 60 in which the rear wheels R2 and R3 arranged at the left and right sides of the rear end of the infant folding tricycle are rotatably supported and bent in a substantially U shape. The tip 51 has a locking hole 52, a U-shaped connecting hole 53, and a stay 54 into which the rear 42 of the vehicle body intermediate frame 40 is inserted. The vehicle body intermediate frame 40 connects the vehicle body front frame 30 and the vehicle body rear frame 50. The front 41 is inserted into the stay 32 of the vehicle body front frame 30, and the rear 42 is inserted into the stay 54 of the vehicle body rear frame 50. Connect freely.

When folding the infant tricycle when using the footrest step mechanism E, the footrest step mechanism E is changed from the position when it is used to the position when it is not used. That is, as shown in FIG. 9, the lock piece L of the stopper X of the base frame F is fitted into the groove 57 corresponding to the groove 57 among the two grooves 56 and 57 provided at the rear position 55 of the vehicle body rear frame 50 when not in use. It is packed and fixed at the corresponding position when not in use, and the footrest step base A is fixed at the corresponding position when not in use by the fixing piece K provided at the rear. To fold the infant tricycle from this state, pull up the lower part of the operation piece 61 provided behind the saddle S, lift the rear of the saddle S, and in front of the vehicle body front frame 30 and the vehicle body intermediate frame 40. It is folded at the pivotal position and the pivotal position behind the vehicle body rear frame 50 and the vehicle body intermediate frame 40. Since the footrest step mechanism E is fixed at the position when not in use, there is no problem in the folding operation.

When the infant tricycle is folded when the footrest step mechanism E is not in use, the footrest step mechanism E has already been changed to the position when it is not in use, so that there is no problem in the folding operation.

An insertion portion 62 of the operation rod Z is provided at the rear portion of the infant tricycle, and as shown in FIG. 10A, by inserting the tip of the operation rod Z, the pedal is self-powered through an interlocking mechanism (not shown). It enables the operation of a tricycle for infants at an early age when it is not possible to pedal. As shown in FIG. 10B, the tip of the operating rod Z is provided with swinging pieces Z1 and Z2 so as not to be easily pulled out by the projecting pieces Z3 and Z4 provided at predetermined positions of the swinging pieces Z1 and Z2. Fix to. As a result, the operating rod Z can be attached to the infant tricycle with one touch. When the operating rod Z is not used, the insertion portion 62 is closed by the lid body 62a (see FIG. 1).

As described above, according to the present invention, in an infant three-wheeled vehicle in which a handle frame having pedals on the front wheels and left and right rear wheels are framed by a body frame with a saddle attached, the body frame is formed. The front frame of the car body, which protrudes backward from the middle of the handle frame, and the rear part of the car body, which protrudes forward from the middle of the reinforcing pipe that rotatably supports the left and right rear wheels and bends in a U-shape. It is formed by a frame, a front frame of the vehicle body and a front position of the vehicle body, and a rear frame of the vehicle body and an intermediate frame of the vehicle body pivotally installed at the rear position. Since the frame is equipped with a footrest step mechanism for using the pedal as a footrest step, a pedal that is not used as a child can be used as a footrest step, so that the pedals can be shared and the economic effect can be enhanced.

H Handle frame M1, M2 Handle mast G1, G2 Handle grip P Handle pipe R1 Front wheel Q1, Q2 Axle D1, D2 Pedal J1, J2 Crank shaft Y1, Y2 Swing piece Y3, Y4 Projection piece U1, U2 Fixed ring R2, R3 Rear wheel V Hole concealment V1, V2 Swing piece V3, V4 Projection piece E Foot mounting step mechanism F Base frame L Lock piece X Stopper A Foot mounting step base B1, B2 Fitting holes C1, C2 Insert hole K Fixed piece S Saddle T Backrest W Awning Z Operation rod Z1, Z2 Swing piece Z3, Z4 Projection piece I Guard member I1, I2 Rotating member N Accessory case 10 Body frame 11 Front position 12 Intermediate position 13 Elliptical hole 30 Body front frame 31 One end 32 Stay 40 Body intermediate frame 41 Front 42 Rear 50 Body rear frame 51 Tip 52 Locking hole 53 U-shaped connecting hole 54 Stay 60 Reinforcing pipe 61 Operation piece 62 Insertion part

Claims (3)

A handle frame with pedals on the front wheels and left and right rear wheels are attached to the body frame with saddles attached, one end of the front body frame is fitted in the front position of the body frame, and the tip of the rear frame is fitted in the middle position. It is tightly connected and pivotally installed at the front position of the front frame of the vehicle body, and can be folded at the pivotal positions of the front and rear of the intermediate frame of the vehicle body which is pivotally installed at the rear frame of the vehicle body and the rear position of the vehicle body. In a tricycle for infants, the frame is equipped with a footrest step mechanism that is used when you are a child and you cannot pedal on your own.
The foot-mounting step mechanism is composed of a base frame pivotally installed at the rear position of the vehicle body rear frame and a foot-mounting step base pivotally installed at the tip position of the base frame, and the base frame is located at the rear position. A lock piece is fitted into the two grooves provided to fix the lock piece at two places, one when it is in use and the other when it is not in use, and the footrest step base is fitted to fit the crank shaft of the pedal forward. An insertion hole is provided for inserting the hole and the tip of the crank shaft of the pedal, and a fixing piece is provided at the rear to fix the footrest step base at the corresponding positions when it is used and when it is not used. A three-wheeled vehicle for infants , characterized in that the step base is fixed at the corresponding position during use, and the pedal with the crank shaft removed from the axle of the front wheel is fixed to the base of the foot-mounting step and used as the foot-mounting step. When the infant can pedal by himself, the footrest step base is fixed at the corresponding position when not in use, and the pedal removed from the footrest step base is fixed to the axle of the front wheel. The infant tricycle according to claim 1. The pedal is provided with a crank shaft and a fixing ring, the tip of the crank shaft is provided with a swinging piece on both sides, a projecting piece and an operating portion are provided at a predetermined position of the swinging piece, and the pedal is attached to the axle of the front wheel or the axle of the front wheel. When attaching to the insertion hole of the base of the footrest step, it is fixed to the insertion hole of the axle or the base of the footrest step by a projecting piece, and the fixing ring is inserted from the back of the swing piece to prevent it from coming off. The infant tricycle according to claim 1 or 2.

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