CN110962975A

CN110962975A - Tricycle and design method thereof

Info

Publication number: CN110962975A
Application number: CN201910616147.6A
Authority: CN
Inventors: 中井範光
Original assignee: Ides KK
Current assignee: Ides KK
Priority date: 2018-10-01
Filing date: 2019-07-09
Publication date: 2020-04-07
Also published as: JP2020055405A; JP7106118B2

Abstract

The invention discloses a tricycle, comprising a main frame penetrating through the front and back directions; a front main frame supporting the front end of the main frame part and extending in the up-down direction; a rear main frame supported at the rear end of the main frame and extending downward; a rear wheel shaft part connected with the lower end of the rear main frame and extending towards the two sides of the vehicle body; the main frame is provided with a supporting seat cushion; the seat cushion is provided with a front and a rear continuous strip-shaped sitting parts which are positioned in front of the center of the rear wheel shaft part, and is provided with non-sitting parts which are positioned behind the sitting parts and have lengths which span the front and the rear of the rear wheel shaft part, and the full length setting can ensure that an infant at the front end of the sitting part can sit astride the sitting front side sitting part and an infant behind the sitting front side sitting part has a longer length by leaning on the sitting rear sitting part of the rear straddling sitting part. The invention also discloses a design method of the tricycle. The children with different physiques in different age groups can take the chair well.

Description

Tricycle and design method thereof

Technical Field

The invention relates to a tricycle, in particular to a folding tricycle for children.

The invention also relates to a design method of the tricycle.

Background

In the past, this type of invention was referred to as a tricycle having the following aspects. A main frame passing through the front and back direction, a front main frame supported at the front end of the main frame part and extending in the up and down direction, a front wheel supported and freely rotating at the lower side of the front main frame, an operation handle extending to the two sides of the vehicle body connected above the front main frame, a rear main frame supported and extending downwards at the rear end of the main frame, a rear wheel shaft part connected with the lower end of the rear main frame and extending to the two sides of the vehicle body, a rear wheel freely rotating at the two ends of the rear wheel shaft part and a seat cushion supported by the main frame.

However, the overall size of the tricycle, the size of the seat cushion, and the like have been set by presetting the average physical size of the infant of a specific age. Therefore, there is a problem that: even if the child having a smaller size than the predetermined size has the physical strength and the movement power for pedaling the tricycle, the child cannot step on the tricycle because the child cannot step on the tricycle.

In addition, when the child grows larger than the predetermined size, the buttocks (buttocks) of the child is beyond the seat cushion, and the load balance of the tricycle is disturbed, which makes it difficult to advance. And longer legs, pedaling and ground pedaling operations can also become difficult.

In the former case, the tricycle needs to be changed to a smaller size, and in the latter case, the tricycle needs to be changed to a larger size.

Disclosure of Invention

In order to solve the technical problems, the invention provides a tricycle which enables children of different ages and different physiques to sit well.

The invention provides the following technical scheme:

the tricycle of the invention has a main frame penetrating the fore-and-aft direction, a front main frame supported with the front end of the main frame part and extending in the up-and-down direction, a front wheel supported and freely rotating provided at the lower side of the front main frame, an operation handle extending to the two sides of the tricycle body connected with the upper side of the front main frame, a rear main frame supported with the rear end of the main frame and extending downwards, a rear wheel shaft connected with the lower end of the rear main frame and extending to the two sides of the tricycle body, rear wheels freely rotating provided at the two ends of the rear wheel shaft, a cushion supported by the main frame; and has the following characteristics: the seat cushion is provided with a continuous strip-shaped sitting position which is positioned at the front side of the center of the rear wheel axle part and penetrates through the front and the rear direction, and is also provided with a non-sitting position which is positioned at the rear side of the sitting position and has a length which stretches across the front and the rear of the rear wheel axle part; the front sitting position of the seat cushion is set to be the full length of the seat cushion, so that the child can sit astride forwards, and the distance between the child and the rear sitting position is far.

In order to prevent an infant from sitting in the non-seating position, a raised portion that rises upward from the seating position is provided in the non-seating position as a further improvement of the present invention.

As a further improvement of the present invention, in order to provide strong support to a rear seatable position in which a large child sits, the rear main frame extends upward from a rear wheel axle portion while tilting forward, and is connected to the main frame below the rear seatable position.

In a further improvement of the present invention, the length of the sittable portion in the front-rear direction is set to be in the range of 70 to 85% of the total length of the seat cushion and in the range of 285 to 350mm, which is most preferably used for covering a wide range of age groups.

As a further improvement of the invention, in order to obtain the space-saving storage, the rear end position of the seat cushion can reach the three-point contact object carrying plane of the rear wheel on both sides of the vehicle body and the rear end of the seat cushion and can stand.

In a further improvement of the present invention, the operating portion is provided on the rear side of the sittable portion, so that the tricycle can be folded by operating the operating portion.

As a further improvement of the present invention, the tricycle is designed such that the seat cushion has a total length obtained by presetting a front-side seating range to be occupied by an infant of an average size at a predetermined age, presetting a rear-side seating position to be on a rear side of the front-side seating position, and summing up the front-side seating position length and the rear-side seating position length.

In a further improvement of the present invention, the tricycle is designed such that a front-side seating range is preset to be occupied by an infant of an average size at a predetermined age, a rear section of the front-side seating portion overlaps a front section of the rear-side seating portion, and the total length of the seat cushion is determined by subtracting the overlap amount from a sum of the front-side seating portion length and the rear-side seating portion length.

Compared with the prior art, the invention has the beneficial effects that: can be used for children of different physique due to age.

Drawings

FIG. 1: the invention discloses a tricycle in a unfolding schematic view.

FIG. 2: the seat cushion and the lower cover of the tricycle are taken down.

FIG. 3: the tricycle is a top plan view when unfolded.

FIG. 4: the upper view of the tricycle shows the schematic of the front and rear riding ranges in the hatched area.

FIG. 5: the tricycle is shown in an unfolded use state, wherein (a) is shown in a use state of a child with a small physique, and (b) is shown in a use state of a child with a large physique.

FIG. 6: the tricycle is a schematic diagram about to be folded.

FIG. 7: the tricycle is a schematic view of a folding handle and a self-standing state of storage.

FIG. 8: the schematic view of this tricycle when folding.

Wherein, 1: a tricycle;

10: a main frame;

11: a horizontal frame section;

12: an inclined frame part;

15: a coating material;

17 a: an operation section;

20: a front main frame;

30: a front wheel;

40: a handle portion;

50: a rear main frame;

60: a rear wheel axle portion;

70: a rear wheel;

80: a seat cushion;

81: a sittable part;

81 a: a front sittable part;

81 b: a rear sitable part;

82: a non-seatable part;

82 a: a raised portion;

a: a first bending mechanism;

c: a second bending mechanism;

d: a locking mechanism;

s1: a space (housing space);

x: and (5) a carrying surface.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The tricycle 1 of the present invention includes: a main frame 10 extending in the front-rear direction; a front main frame 20 cross-connected to the front end of the main frame 10 and extending in the up-down direction; a front wheel 30 provided rotatably below the front frame 20; a handle part 40 connected to the upper side of the front main frame and extending to both sides of the vehicle body; a rear main frame 50 extending downward at a rear side of the main frame 10; a rear wheel shaft part 60 connected to the lower end of the rear main frame 50 and extending in the direction of both sides of the vehicle body; a rear wheel 70 rotatable at both left and right ends of the rear wheel shaft portion 60; a seat cushion 80 (see fig. 1 to 3) supported by the main frame 10.

The main frame 10, the front main frame 20, the handlebar portion 40, the rear main frame 50, the rear wheel axle portion 60, and the like are formed of a hollow tube made of a hard metal material, for example.

The rear end of the main frame 10 and the rear main frame 50 may be integrally connected. Alternatively, the rear main frame 50 may be regarded as a member separate from the main frame 10.

The front side portion of the horizontal frame portion 11 is divided into front and rear portions, and a first bending mechanism a whose front portion can be folded in half toward the rear portion is provided between the divided front and rear portions.

The first bending mechanism A consists of: the front section of the horizontal frame part 11 is rotatable about the first support part a1 as a fulcrum, and the front section of the horizontal frame part 11 is fixed linearly to the rear section, and the locked state can be released by pulling the operating part 17 a.

When the locked state is released, the front portion of the horizontal frame part 11 can be rotated, and the front wheel 30 is also rotated.

The front wheel 30 rotates as described above, and enters the space S1 on the side of the angle α between the main frame 10 and the rear main frame 50 (see fig. 6 to 8).

In addition, if there are components that can achieve the same function, the first bending mechanism a may be a member other than that shown in the drawings.

The operation portion 17a is a long strip-shaped bendable member, and the rear end is bent like a U-shape as shown in the figure. One end of the operating portion 17a is attached to the first bending mechanism, and the other end thereof is exposed to the outside through the rear side of the sitting portion 81 of the seat cushion 80.

In fig. 2, reference numeral 15 denotes a foldable covering material covering the first bending mechanism a, and reference numeral 16 denotes a lower cover covering the first bending mechanism a and the covering material 15 from below.

The front main frame 20 extends in the vertical direction and is connected to the main frame 10. By operating the handle of the handle part 40 connected to the upper part, the handle part 40 and the front fork 21 are rotated simultaneously, and the traveling direction of the front wheel 30 is changed.

A second bending mechanism C capable of bending the upper member backward and a lock mechanism D capable of unlocking or locking the bending mechanism C so as not to rotate are provided above the connection point of the front main frame 20 and the main frame 10.

The front main frame 20 is normally kept in a straight state, and after the lock mechanism D is released as shown in fig. 7, the second bending mechanism C rotates the handle portion 40 and the upper end member of the front main frame 20 rearward about the fixed shaft C1 as a fulcrum.

The locking mechanism D is formed by a dial on the handle portion 40, and can lock the upper portion of the front main frame 20 to be unable to rotate or release the locked state after being tightened.

In the case where there are components that can achieve the same function, the second bending mechanism C and the lock mechanism D may be members other than those shown in the drawings.

Pedals 31 are provided on both sides of the front wheel 30 to rotate together with the front wheel 30.

The handle portion 40 extends in a right-and-left direction like a T-shape above the front main frame 20, and a handle grip 41 that can be gripped by a hand is provided at an end portion in the extending direction.

The rear main frame 50 is an extension of the rear end of the main frame 10 downward. The lower end of the main frame 50 is then connected to the rear wheel shaft portion 60 in an inverted T-shape.

In other words, the rear main frame 50 extends forward and upward at the center of the rear wheel shaft portion 60, and is connected to the main frame 10 below the rear seatable range 81b of the seatable portion 81.

As a point of satisfaction of the present embodiment, an angle α formed by the rear main frame 50 and the horizontal frame part 11 of the main frame 10 is set within a range of 100 to 110 degrees (see fig. 2). this structure not only provides good support for the load applied to the main frame 10 by the rear main frame 50, but also allows the folded front wheel 30 to be effectively accommodated in the space S1 between the rear main frame 50 and the main frame 10.

In the figure, reference numeral 51 denotes a multi-function U-shaped fixing member. For example, chain locks, towline attachable, small storage cases, etc. may be installed.

The rear wheel axle portion 60 extends to both sides of the tricycle 1. The rear wheels 70 are rotatably provided at both ends in the extending direction. The rear wheel shaft 60 is provided with a concave-convex slip-preventing band on the upper half side thereof, so that the feet of an infant or the like can easily stand stably.

As shown, the rear wheels 70 on both sides of the vehicle body are smaller in diameter than the front wheels 30.

The lower surface of the seat cushion 80 is formed with a recess crossing both sides of the vehicle body in the horizontal frame part 11 of the main frame 10, and the recess is fitted into the horizontal frame part 11 of the main frame 10 and fixed by a bracket, a screw, or the like.

The seat cushion 80 may be formed of a single member integrated with each other, or may be formed of various members such as a hard member and a soft pad covering the hard member.

A continuous elongated sitting portion 81 is provided in the seat cushion 80 in the front-rear direction in front of the center of the rear wheel shaft portion 60, and a non-sitting portion 82 is provided on the rear side of the sitting portion 81 so as to extend over the front and rear of the rear wheel shaft portion 60.

The seating portion 81 has a full length that ensures a front seating portion 81a for seating an infant forward and a rear seating portion 81b for seating an infant backward and is located behind the front seating portion 81a and is long.

Specifically, the seatable part 81 can be designed in 2 ways as shown below (see fig. 3 and 4).

As shown in fig. 3, the design method is to preset a small-sized child sitting range as a front sitting position 81a at the front end of the sitting position 81 and a long rear sitting position 81b behind the front sitting position 81a, and to sum the front sitting position length and the rear sitting position length to obtain the total length L1 of the seat cushion 81.

As shown in the drawing, the front seatable part 81a is located more forward than the center position of the entire length L1 of the seat cushion 81.

In the design method shown in fig. 4, the range in which a small child can sit astride is preset at the front end of the sitting portion 81 as the front sitting portion 81a, the preset rear sitting portion 81b overlaps the front sitting portion 81a, and the total length L1 of the seat cushion 81 is obtained by subtracting the overlap c from the sum of the length of the front sitting portion 81a and the length of the rear sitting portion 81 b.

And as shown, the overlapping portion c encompasses the center of the full length L1 of the seat cushion 81.

The front sitable part 81a is a position occupied in the front-rear direction when an infant of average physical size of a relatively low age (for example, 1.5 years old) straddles the sitable part 81, and the length a in the front-rear direction at this time can be found by an experiment.

The rear sitable portion 81b is a position that an infant of average physical size of older age (for example, 4.5 years old) occupies in the front-rear direction when straddling the sitable portion 81, and the length b in the front-rear direction at this time can be found by experiment.

In particular, the latter (see fig. 4) can avoid a situation where 2 infants sit back and forth at the same time, for safety reasons and the like.

After repeated experiments, the present inventors confirmed that the total length L1 of the sitting portion 81 in the front-rear direction is within a range of 70 to 85% of the total length L0 of the seat cushion 80 and within a range of 285 to 350 mm.

When the total length L1 of the sitting portion 81 is less than the lower limit of the above range, the hip of a child is beyond the sitting portion 81 when the child aged 1.5 grows to an average size corresponding to the child aged 5, the distance between the feet and the pedals is relatively long, and it may be difficult to achieve the standard of balanced seating.

When the total length L1 of the sitting portion 81 exceeds the upper limit of the above range, the possibility that 2 infants will ride together is remarkably increased.

Further, the total length L1 of the sitting portion 81 is preferably in the range of 286 to 348mm, and in this embodiment, the total length L1 of the sitting portion 81 is 317mm, and the total length L0 of the seat cushion 80 is 409 m.

In addition, in order to allow a child aged 1.5 to 5 to sit astride easily and naturally, the width of the sitting portion 81 gradually decreases from the maximum width W of the back to about 120 mm.

The seating portion 81 is substantially flat without recesses and projections. In detail, the center portion of the vehicle body in the direction of both sides is a convex curved surface protruding upward, and a slightly downward slope is formed at the forward connection.

The non-seating portion 82 is a portion that is required to ensure that an infant cannot sit, and is disposed rearward of the seating portion 81 and extending across the front and rear of the rear wheel axle portion 60.

The non-seating portion 82 is provided with a ridge portion 82a protruding upward from the seating portion 81 in a mountain shape when viewed from the side. The top of this raised portion 82a is forward of the center of the rear axle portion 60. And the seatable part 81 is more forward than the top.

In the tricycle 1 configured as described above, the rearmost end 80a of the seat cushion 80 is disposed to protrude rearward from the rear wheel shaft portion 60 so that the rear end 80a of the rear wheel 70 and the seat cushion 80 can stand in contact with the substantially horizontal and flat object mounting surface X at three points (see fig. 7 and 8).

Next, the characteristic operational effects of the tricycle 1 configured as described above will be described in detail.

When the child sits on the sitting portion 81, the child can sit on the sitting portion 81 while avoiding the non-sitting portion 82 in which the rising portion 82a exists. That is, the seated position of the child can be naturally urged to be on the seatable portion 81.

In addition, the front-side seatable part 81a and the rear-side seatable part 81b are secured to the seatable part 81 to be long in the front-rear direction.

Therefore, as shown in fig. 5(a), the child of a small size of a low age can sit on the front sittable part 81a of the sittable part 81, place the foot on the foot rest 31, or push the foot on the ground.

Further, as shown in fig. 5(b), a child of a high age and an old physical constitution can sit on the rear sitting portion 81b of the sitting portion 81, and can naturally move such as putting on the steps 31 or stepping on the ground without being hindered by the long feet.

Further, since the gravity application position that changes forward and backward is always in front of the rear wheel axle portion, even if the gravity is balanced and then shifts to the rear side, the front wheel 30 does not lift up, and stable traveling is still possible.

The rear sitting portion 81b is stably supported by the rear main frame 50 inclined forward and upward, and the breakage, deformation, and the like of each portion can be effectively prevented when a large child applies a large weight.

To store the tricycle 1, as shown in fig. 6, the caregiver pulls the operating portion 17a with one hand and folds the front main frame 20 downward with the other hand to rotate the front portion (the front section 11a, the front main frame 20, the handle portion 40, the front wheel 30, and the like) of the first stay a1 of the first folding mechanism a, so that the front wheel 30 enters the angle space S1 formed by the seat cushion 80 and the rear main frame 50.

Therefore, the tricycle 1 is in a compact storage state.

Further, since the operating portion 17a is located behind the sitting portion 81 of the seat cushion 80, it is possible to prevent an infant sitting astride the sitting portion 81 forward from pulling the operating portion 17a during walking, which may cause danger.

In the stored state, the rear wheel 70 and the rear end 80a of the seat cushion 80 contact the object mount surface X at three points, and the tricycle 1 can stand (see fig. 7 and 8). Although the tricycle 1 is not in operation, it can be supported on a carrier surface X having a relatively small horizontal area.

Even after the handle part 40 is rotated backward, the height of the front main frame 20 is reduced after being folded, and a more compact storage state is obtained.

The present invention is not limited to the above-described embodiments, and may be modified as appropriate without departing from the scope of the present invention.

Claims

1. A tricycle including a main frame penetrating in a front-rear direction; a front main frame supporting the front end of the main frame part and extending in the up-down direction; a front wheel rotatably supported by the lower side of the front main frame; the upper part of the front main frame is connected with an operating handle extending towards the two sides of the vehicle body; a rear main frame supported at the rear end of the main frame and extending downward; a rear wheel shaft part connected with the lower end of the rear main frame and extending towards the two sides of the vehicle body; two ends of the rear wheel shaft part are provided with rear wheels which can freely rotate; the main frame is provided with a supporting seat cushion; the seat cushion is arranged in front of the center of the rear wheel shaft part and is provided with a continuous strip-shaped sitting part in the front-back direction, and a non-sitting part with the length spanning the front part and the back part of the rear wheel shaft part is arranged behind the sitting part; the method is characterized in that: the total length of the sitting part is set to ensure that the front sitting part of the front infant straddling is long enough and the rear sitting part of the rear infant straddling is long enough.

2. The tricycle of claim 1, wherein: the non-sittable part is provided with a bulge which is higher than the sittable part.

3. The tricycle of claim 1 or 2, wherein: the rear main frame is inclined upward and forward from the rear wheel shaft portion and is connected to the main frame at the rear seatable position.

4. The tricycle of any of claims 1 to 3, wherein: the length of the seat is set to be 70-85% of the total length of the seat cushion and 285-350 mm.

5. The tricycle of any of claims 1-4, wherein: the tail end of the seat cushion is designed to form a three-point contact loading plane with the left and right rear wheels and the tail end of the seat cushion and can stand by itself.

6. The tricycle of any of claims 1-5, wherein: the tricycle in which the main frame is foldable by operating an operating part, and the operating part is provided behind the seatable part of the seat cushion.

7. The design method of a tricycle according to any of claims 1 to 6, characterized in that: the total length of the seat cushion is obtained by presetting a front-side seating range to be occupied by an infant of an average size at a predetermined age, presetting a rear-side seating position to be a rear stage of the front-side seating position, and summing up the front-side seating position length and the rear-side seating position length.

8. The design method of a tricycle according to any of claims 1 to 6, characterized in that: the total length of the seat cushion is determined by presetting a front-side seating range to be occupied by an infant of an average size at a predetermined age, overlapping the rear end of the front-side seating portion with the front end of the rear-side seating portion, and adding the front-side seating portion length and the rear-side seating portion length and subtracting the overlap amount.