KR20170034625A

KR20170034625A - Bicycle with baby carriage

Info

Publication number: KR20170034625A
Application number: KR1020150133140A
Authority: KR
Inventors: 김광운; 김민학
Original assignee: 김광운
Priority date: 2015-09-21
Filing date: 2015-09-21
Publication date: 2017-03-29

Abstract

The present invention discloses a bicycle which can be easily deformed from a bicycle to a baby carriage, and is improved in ease of use and safety.
A front frame 30 having a main body 20 to which a rear wheel 11 is connected and a rotary shaft 31 rotatably inserted into a fixed shaft 21 formed on a front side of the main body 20; A steering member 40 connected to the front frame 30 and connected to the steering member 40 such that the traveling direction is changed according to the operation of the steering member 40, An infant seat (50) installed at an upper end of the front frame (30); And a fixing means 60 for temporarily fixing the rotary shaft 31 to the fixed shaft 21. When the user intends to use the rotary shaft 31 as a baby carriage, The front wheel 32 and the rear wheel 11 are rotated so that the distance between the front wheel 32 and the rear wheel 11 is close to the front wheel 32. When the user wants to use the bicycle as a bicycle, And the rear wheel 11 are spaced apart from each other.

Description

{BICYCLE WITH BABY CARRIAGE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a baby carriage combined with a baby carriage, and more particularly, to a baby carriage combined with a baby carriage.

Various mobile devices such as a bicycle, a baby carriage, and a shopping cart have been used. In recent years, such a mobile device has been used in a fused form for the convenience of the user. For example, various types of mobile devices such as a form in which a bicycle and a baby carriage are fused, a form in which a bicycle and a shopping cart are fused, and a form in which a baby carriage and a car seat are fused have been developed. Generally, these multipurpose mobile devices have more than three wheels for safety of movement and use.

Among them, a mobile device in which a bicycle and a stroller are fused is usually structured such that the stroller is detachably mounted to the rear of the bicycle. That is, a bicycle having a stroller is configured such that the stroller can be connected to or disconnected from the rear of a tricycle or a two-wheel bicycle for use separately or separately by connecting the stroller to the rear of the bicycle.

However, the bicycle having such a structure has a problem in that it is inconvenient to operate in a narrow area because the whole length of the bicycle is longer than that of the bicycle when connected to each other, .

In addition, when the yamotta is connected to the rear of the bicycle, there is a problem that frequent large and small safety accidents occur frequently in order to check the condition of infants carried in the stroller during traveling.

Korean Patent Laid-Open Publication No. 1999-030344 (published by Yu Mo Koo, April 26, 1999)

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and provides an improved bicycle which can be easily changed from a bicycle to a baby carriage and is structurally transformed to narrow the gap between the front wheel and the rear wheel, .

Another object of the present invention is to provide a bicycle that can improve safety when the center of gravity is moved to the center side when used as a stroller.

It is another object of the present invention to provide a bicycle that can improve the convenience of operation and safety because the position of the front wheel axle is moved toward the rear wheel axis when the bicycle is switched to the baby stroller.

It is another object of the present invention to provide a baby bicycle which is safe for a baby on a baby stroller because the front wheel installed on the baby stroller is resiliently supported so that the impact generated by the collision with the ground is prevented from being transmitted to the baby stroller.

In order to achieve the above object, according to one aspect of the present invention, there is provided a stroller- A front frame having a rotation shaft rotatably inserted into a fixed shaft formed on a front side of the main body; Steering means provided on the front frame; Each of the front wheels connected to the steering unit so that the traveling direction changes according to the operation of the steering unit, and is provided on the front side of the front frame; A child seat provided at an upper end of the front frame; And a fixing means for temporarily fixing the rotary shaft to the fixed shaft. When the user wants to use the baby carriage as a baby carriage, the rotary shaft is rotated in the direction of the body so that the distance between the front wheel and the rear wheel is close, If the user wishes to use the bicycle as a bicycle, the rotary shaft is rotated in the opposite direction so that the front wheel and the rear wheel are spaced apart from each other and used as a bicycle.

More preferably, the fixing means comprises a fixing bolt which passes through a fixing hole formed at an interval of 180 degrees to the fixing shaft and is fastened to a nut mounted on the rotary shaft.

More preferably, the front frame includes: a support shaft connected to the rotation shaft; A hinge coupling fixed to a front side of the support shaft; An upper plate and a lower plate hingedly coupled to the hinge coupling portions, respectively; And a wheel fixing plate hinged to the other side of the upper plate and the lower plate and having the front wheel rotatably fixed thereto.

More preferably, the front frame is hinge-coupled to the hinge-engaging portion, and the first hinge shaft is rotatably connected at one side thereof to the gravity direction and the other side is fixed to the upper and lower plates. A second hinge shaft hinged to the wheel fixing plate and rotatably connected to one side in a direction perpendicular to the gravity direction and the other side fixed to the upper and lower plates; And a damper having one side fixed to the other side of the lower plate and the other side fixed to one side of the upper plate.

More preferably, the steering means includes a handlebar gripped by a user with a hand; A steering shaft connected to a central region of the handlebar and rotatably mounted within the rotary shaft; A steering plate connected to the other end of the steering shaft; And a steering link hinged to the steering plate at one end and hinged to the wheel mounting plate at the other end.

Still more preferably, the steering link is formed by a ball joint at both end hinge-engaging portions.

More preferably, a universal joint is provided at an intermediate portion of the steering shaft.

More preferably, a rear frame connected to the rear wheel is rotatably coupled to the main body, and a damper for absorbing impact is mounted between the rear frame and the main body.

As described above, the bicycle-combined bicycle according to the present invention is easy to switch from a bicycle to a baby carriage, and the structure is transformed to narrow the gap between the front wheel and the rear wheel, thereby facilitating the operation and improving safety.

In addition, in the case of using the stroller according to the present invention, the center of gravity is shifted toward the center side, thereby improving safety. In addition, since the position of the front wheel axle is moved toward the rear wheel axle when the bicycle is switched from the bicycle to the stroller, the convenience and safety of operation are improved.

In addition, the present invention has the effect that the impact generated by the collision with the ground is prevented from being transmitted to the baby carriage since the front wheel installed on the baby carriage is absorbed by the damper.

1 is a perspective view showing a bicycle state, which is a preferred embodiment of the present invention,
FIG. 2 is a perspective view showing a stroller state, which is a preferred embodiment of the present invention,
3 is a cross-sectional view showing the fixing means mounting portion shown in Fig. 1,
4 is a perspective view showing a front frame of the bicycle,
5 is a plan view showing a front frame of the bicycle,
Fig. 6 is a state diagram showing the turning radius of the baby carriage-
7 is a sectional view showing a front frame of a bicycle;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Here, the shape, size, ratio, angle, number and the like shown in the accompanying drawings are schematic and may be modified somewhat. 2) Since the drawing is shown by the line of sight of the observer, the direction or position to explain the drawing can be variously changed according to the position of the observer. 3) The same reference numerals can be used for the same parts even if the drawing numbers are different. 4) If 'include', 'have', 'have', etc. are used, other parts can be added unless '~ only' is used. 5) Numerals can also be interpreted as described in the singular. 6) Even if the shape, size comparison, positional relationship, etc. are not described as 'weak or substantial', it is interpreted to include the normal error range. 7) 'after', 'before', 'after', 'after', and 'after' are not used to limit the temporal position. 8) The terms 'first, second, third', etc. are used selectively, interchangeably or repeatedly for convenience of division, and are not construed in a limiting sense. 9) If the positional relationship of the two parts is described as 'on top of', 'on top', 'on bottom', 'on side', 'on side' and so on, This can also be located. 10) When parts are electrically connected to '~ or', parts are interpreted to include not only singles but also combinations, but parts are interpreted solely if they are electrically connected to '~ or'.

FIG. 1 is a perspective view illustrating a bicycle according to a preferred embodiment of the present invention. FIG. 2 is a perspective view illustrating a stroller according to a preferred embodiment of the present invention. 5 is a plan view showing a front frame of the bicycle, Fig. 6 is a state diagram showing the turning radius of the bicycle combined with the baby carriage, Fig. 7 is a front view of the bicycle, Fig.

1 to 7, a bicycle combined with a baby carriage according to a preferred embodiment of the present invention includes a main body 20, a rear frame 10 connected to a rear end of the main body 20 and to which the rear wheel 11 is fixed, A front frame 30 rotatably connected to the front end of the main body 20 and to which the two front wheels 32 are fixed and fixing means 60 for fixing the front frame 30 to the main body 20. [ A baby seat (50) is mounted on the upper end of the front frame (33). The infant seat 50 may be fixedly mounted, but it may be detachable depending on the user's purpose, or may be applied to a structure commonly used with a vehicle seat.

The main body 20 is constituted by a frame constituting a triangular frame. And a fixed shaft 21 is formed at the front side. The saddle 22 is provided at the center of the saddle 22 and the pedal 23 is mounted at the lower end of the saddle 22. The front sprocket of the pedal 23 is connected to the sprocket of the rear wheel 11 by a chain so that the rotational power of the pedal 23 is transmitted.

The rear frame 10 is hingedly coupled to the main body 20 so as to be vertically rotatable. The upper end of the rear frame 10 is fitted with a damper 12 at a middle portion of the main body 20. The damper 12 is preferably composed of an elastic spring, but a hydraulic damper or the like can also be applied. The damper (12) serves to reduce the impact of the rear wheel (11).

The front frame 30 includes a rotary shaft 31 rotatably inserted into a stationary shaft 21 formed at a front end of the main body 20 and a support shaft 30 connected to an end of the rotary shaft 31 and extending along the longitudinal direction of the bicycle A hinge engaging portion 34 fixed to the front side of the support shaft 32 and an upper plate hinged to the hinge engaging portion 34 and mounted on the upper end toward the front wheel 32 on both sides A lower plate hinged to the upper and lower plates 35 and 35 and a hinge engaging portion 934 and hinged to the lower ends of the upper and lower plates 35 and 36, And a wheel fixing plate 37 rotatably fixed. One side of the upper plate 35 and the lower plate 36 is hinged to the hinge coupling portion 34 by the first hinge shafts 35a and 36a. One side of the first hinge shafts 35a and 36a is fixed to the upper plate 35 and the lower plate 36 respectively and the other side is connected to the hinge coupling portion 34 so as to be vertically rotatable. The other side of the upper plate 35 and the lower plate 36 is hinged to the upper and lower ends of the wheel fixing plate 37 by second hinge shafts 35b and 36b, respectively. One side of the second hinge shafts 35b and 36b is fixed to the upper plate 35 and the lower plate 36 respectively and the other side is connected to the wheel fixing plate 37 so as to be rotatable in the forward and backward directions. The wheel fixing plate 37 is fixed by the upper plate 35 and the lower plate 36 and the second hinge shafts 35b and 36b so that the left and right turning operations can be realized by the steering means.

A damper 38 is mounted between the upper plate 35 and the lower plate 36. Although the damper 38 has been described by way of example as a coil spring, it is also possible to apply a hydraulic damper. One end of the damper 38 is fixed to the other side of the lower plate 36, and the other end is fixed to one side of the upper plate 35. It is preferable that the other end of the damper 38 is fixed together with the upper plate 35 that the upper plate 35 is fixed to the hinged portion 34 to which the upper plate 35 is hinged.

The hinge coupling portion 34, the wheel fixing plate 37 and the upper plate 35 and the lower plate 36 are connected to the first hinge shafts 35a and 36a and the second hinge shafts 35b and 36b as shown in FIG. And is connected by a structure constituting a four-bar link. The upper plate 35 and the lower plate 36 are configured to have a structure in which the damper 38 is mounted across the hinge engaging portion 34 while being rotatably connected to the hinge engaging portion 34 by the first hinge shafts 35a and 36a The impact generated by the collision between the front wheel 32 and the ground is reduced by the damper 38. [

The steering means 40 includes a steering bar 41 held by the user with a hand, a steering shaft 42 connected to a central region of the steering bar 41 and rotatably inserted into the rotational shaft 31, A steering plate 44 fixed to the other end of the shaft 43 and projecting in the left and right direction perpendicular to the steering shaft 42 and a steering plate 44 connected to the wheel fixing plate 37 at the right and left ends of the steering plate 44, And a link 45. A universal joint 46 is connected to the intermediate portion of the steering shaft 42. The universal joint 46 has a structure in which a cross shaft is mounted between two yokes, so that the rotational force is transmitted even when the two shafts are inclined at a certain angle. The universal joint 46 is formed at the upper end before the steering shaft 42 is inserted into the rotary shaft 31. [ Both ends of the steering link 45 are constituted by a ball joint 45a. 4, the steering link 45 rotates the wheel fixing plate 37 in the front-rear direction when the steering plate 44 is rotated in the front-rear direction. When the wheel fixing plate 37 is rotated in the vertical direction, 45a are slid to prevent the steering link 45 from being damaged. Since the contact surface of the ball joint 45a has a circular sphere shape, the ball joint 45a can rotate in the forward and backward direction and in the up and down direction. The other side of the second hinge shafts 35b and 36b is preferably made of the same ball joint as the ball joint 45a.

3, the fixing means 60 includes a fixing hole 63 penetrating through the fixing shaft 21 at intervals of 180 degrees, a fixing bolt 61 inserted into the fixing hole 63, And a nut 62 mounted on the rotary shaft 31 so that the fixing bolt 61 inserted into the rotary shaft 63 is fastened. It is also possible to use a fixing pin instead of the fixing bolt 61. In this case, the nut 62 is formed of a bush into which the fixing pin is inserted.

2, when the user intends to use the stroller as a stroller, the rotating shaft 31 is rotated in the direction of the main body 20, and the fixing bolt 61 is fixed to the nut 20 in a state in which the supporting shaft 32 is folded toward the main body 20, (62) to fix the rotary shaft (31) to the fixed shaft (21).

At this time, as shown in FIG. 6, since the distance between the front wheel 32 and the rear wheel 11 is close to each other, it is easy to change the direction even in a narrow area. In addition, since the center of gravity is moved to the central region of the main body 20, safety is improved.

When the user wishes to use the bicycle as a baby stroller again, the fixing bolt 61 is separated from the nut 62 as shown in FIG. 1, and the rotary shaft 31 is rotated in the opposite direction, The fixing bolt 61 is inserted into the fixing hole 63 in the opposite direction and fastened to the nut 62 so that the rotary shaft 31 is fixed to the fixing shaft 21 . At this time, since the interval between the front wheel 32 and the rear wheel 11 is distanced again, the bicycle can be used.

As described above, the bicycle combined with the baby carriage according to the present invention has a structure in which the rotary shaft 31 is connected to one end of the support shaft 33 and the front wheel 32 is provided on the other end of the bicycle. The front wheel 32 and the rear wheel 11 are positioned so that the distance between the front wheel 32 and the rear wheel 11 is shortened so that the user can easily operate in a narrow area, Can be stably mounted on the bicycle.

The steering shaft 42 is rotatable even if the steering shaft 42 is inserted into the rotary shaft 31 and the rotary shaft 31 is fixed by the fixing bolt 61. Therefore, The direction of the front wheel 32 can be changed.

In addition, since the damper 38 is installed on the front frame 30, the vibration generated during operation is prevented from being transmitted to the occupant or the infant seated on the infant seat 50, so that the stability is improved. Further, the vibration is further blocked by the damper 12 provided between the rear frame 10 and the main body 20, so that the stability is improved.

Since the both ends of the steering link 45 are formed by the ball joint 45a and are hinged to each other, it is possible to cope with the front-rear rotation and the vertical rotation of the bicycle, It is prevented from being damaged.

Also, the universal joint 46 is provided at the middle portion of the steering shaft 42, so that the direction of the front wheel 32 can be changed even if the angle of the steering shaft 42 is changed. That is, in the case of using as a bicycle, the steering shaft 42 is formed so as to be long standing so that the user can hold the handle bar 41 while being carried on the saddle 22, It is possible to tilt the steering shaft 42 so that the user can easily grasp the handlebar 41 on the ground. At this time, the rotary shaft 31 of the portion where the universal joint 46 is installed is also formed so as to be bent at a certain angle.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

10: rear frame
11: Rear wheel
20:
21: Fixed shaft
30: Front frame
31:
32: front wheel
33: Support shaft
34:
35: top plate
36: Lower plate
37: Wheel mounting plate
40: Steering means
50: Infant sheets
60: Fixing means

Claims

A main body 20 to which a rear wheel 11 is connected;
A front frame (30) having a rotation shaft (31) rotatably inserted into a fixed shaft (21) formed on the front side of the main body (20);
Steering means (40) provided on the front frame (30);
Each of the front wheels 32 connected to the steering means 40 so as to change its traveling direction according to the operation of the steering means 40 and installed on the front side of the front frame 30;
An infant seat (50) provided at an upper end of the front frame (30); And
And fixing means (60) for temporarily fixing the rotary shaft (31) to the fixed shaft (21)
When the user wants to use the stroller as a baby carriage, the rotary shaft 31 is rotated in the direction of the main body 20 so that the distance between the front wheel 32 and the rear wheel 11 becomes close to each other, The rotary shaft 31 is rotated in the opposite direction so that the front wheel 32 and the rear wheel 11 are spaced apart from each other so that the bicycle can be used as a bicycle.

2. The apparatus according to claim 1, wherein the fixing means (60)
And a fixing bolt (61) penetrating a fixing hole (63) formed at an interval of 180 degrees on the fixing shaft (21) and fastened to a nut (62) mounted on the rotary shaft (31).

2. The apparatus of claim 1, wherein the front frame (30)
A support shaft 33 connected to the rotation shaft 31;
A hinge coupling portion 34 fixed to the front side of the support shaft 33;
An upper plate 35 and a lower plate 36 hingedly coupled to the hinge engaging portions 34, respectively;
And a wheel fixing plate (37) hinged to the other side of the upper plate (35) and the lower plate (36) and having the front wheel (32) rotatably fixed.

4. The apparatus of claim 3, wherein the front frame (30)
First hinge shafts (35a, 36a) hinged to the hinge engaging portions (34) and connected to one side so as to be rotatable along the gravity direction and the other side fixed to the upper plate (35) and the lower plate (36);
Second hinge shafts 35b and 36b hingedly coupled to the wheel fixing plate 37 and rotatably connected to one side in a direction perpendicular to the gravity direction and the other side fixed to the upper plate 35 and the lower plate 36; And
And a damper (38) fixed at one side of the lower plate (36) and the other side fixed to one side of the upper plate (35).

4. The steering device according to claim 3, wherein the steering means (40)
A handle bar 41 which the user holds by hand;
A steering shaft (42) connected to a central region of the handlebar (41) and rotatably mounted inside the rotary shaft;
A steering plate 44 connected to the other end of the steering shaft 43; And
And a steering link (45) hinged at one end to the steering plate (44) and hinged at the other end to the wheel fixing plate (37).

6. A steering system according to claim 5, wherein the steering link (45)
And a hinge coupling portion at both ends of the ball joint 45a.

6. The bicycle according to claim 5, wherein a universal joint (46) is provided at a middle portion of the steering shaft (42).

The rear frame (10) according to claim 1, wherein a rear frame (10) connected to the rear wheel (11) is rotatably coupled to the body (20) (12) is mounted.