JP7209880B1 - portable pram - Google Patents

Abstract

To provide a portable stroller that can be easily carried by a companion even when an infant does not ride in the stroller and does not use it.
A portable stroller (1) includes casters (50) on which wheels (51) are rotatably mounted, a plurality of hollow frame members (10), and two or more frame members (10) positioned adjacent to each other. A plurality of joint members 30 (first joint member 30A, second joint member 30B, third joint member 30C, fourth joint member 30D) that can be connected or released from the part 10E, a connecting string 80 that can be stretched and deformed, and a seat member 70 detachable from the body frame 2 by two layers of seat fabric 72. - 特許庁In the body frame 2, adjacent sections having a relationship of adjacent sections between the first section D1 and the fourth section D4 on the reference imaginary line L connecting the front wheel 51F and the rear wheel 51R located on the same side are: They are connected by a connecting string 80 inserted through the inside 10N of the frame member 10. - 特許庁
[Selection diagram] Fig. 1

Description

Article 30, Paragraph 2 of the Patent Act applies The stroller related to the invented "portable baby carriage" will be published on the "Monozukuri Creation Base SENTAN Homepage", which will be posted on March 10, 2021, and will be published on March 11 and 12, 2021. At the "Toyota City Hall Monozukuri Industry Promotion Section / Monozukuri Mirai Juku" booth at the "Toyota Business Fair 2021" exhibition (sponsored by Toyota City and the Toyota Chamber of Commerce and Industry) held at Sky Hall Toyota (Toyota City General Gymnasium) for two days. Exhibited and open to the public, the exhibition "Robot and Aerospace Festa Fukushima 2021" held at Big Palette Fukushima for two days on November 19th and 20th, 2021 (sponsored by Fukushima Prefecture) Booth "Marutaka Industry Co., Ltd." ” and open to the public

TECHNICAL FIELD The present invention relates to a portable baby carriage which can be easily carried around as a baby stroller for carrying an infant, which is constructed in a structure in which disassembly and assembly can be arbitrarily selected as required.

2. Description of the Related Art When a person goes out with an infant, it is often the case that the infant is placed in a stroller. As is well known, many strollers in general use have a hinge mechanism on the body frame, which rotates and folds a part of the frame, and a flexible seat attached to the body frame. is narrowed and folded based on the rotation of the frame, so that the entire vehicle can be stored compactly. An example of such a foldable stroller is disclosed in US Pat.

Patent Literature 1 discloses a folding stroller that can fold the frame into an S shape by rotating the frame in a predetermined direction using a hinge mechanism applied to the frame portion, and fold the four wheels inward. The stroller of Patent Literature 1 is said to be foldable into a size that allows it to be carried in a larger tote bag.

Utility Model Registration No. 3227010

However, conventional strollers with a folding structure, including Patent Document 1, have the following problems.

When a parent or other companion has a stroller and goes out with an infant, other than the luggage of the companion, for example, food and drink such as juice and snacks, toys such as toys and picture books, diapers and wet towels Special luggage for infants is required extra, as listed in hygiene products. Therefore, companions generally carry a lot of baggage when they go out. Under such conditions, the infant may not use the stroller, and in this case, the companion may move while holding the folded stroller.

At this time, even if the conventional stroller is compacted by being folded on the body frame, it can be accommodated only about half of the usage form, and it is not reduced to a size that can be stored in a bag and carried on the back. Therefore, the companion, carrying an infant and some baggage, lifts the stroller with the four wheels folded inward and the frame folded so that it does not touch the ground. It is necessary to move, and the physical burden on the companion is extremely large. Moreover, the weight of the conventional stroller is 4 kg or more, and the accompanying person has considerable difficulty in carrying the stroller, especially when going up and down stairs, passing between a train and a platform, etc. .

In addition, Patent Document 1 states that a folded stroller can be carried in a large tote bag. For such companions, it is difficult to carry a large tote bag containing a stroller.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a portable stroller that can be easily carried by a companion of the infant even when the infant does not ride in or use the stroller. do.

In order to achieve the above object, a portable baby carriage according to the present invention has the following configuration.
(1) Casters on which wheels are rotatably mounted as front wheels or rear wheels by holding means including support portions, a plurality of hollow frame members, and two or more of the frames positioned adjacent to each other A vehicle body frame having a plurality of joint members that can be connected or disconnected at each end of each member, a string-like or spiral elastic member that can be freely expanded, contracted and deformed, and a single-layer fabric. Alternatively, a seat member formed detachably from the vehicle body frame is formed of seat fabrics formed by stacking the fabrics in a multi-layered manner, and the body frame includes a front seat member disposed between the two front wheels. a rear connecting portion arranged between the two rear wheels; a front-rear connecting portion arranged between the front wheel and the rear wheel on the same side; A front seat support portion arranged adjacent to the front-rear connecting portion, a rear-side seat support portion arranged adjacent to the front-rear connecting portion on one side of the rear-side connecting portion and the rear-side connecting portion, and a rear seat support portion connected to the rear seat support portion. The first joint member includes the front connecting portion, the front-rear connecting portion on one side, and the front-rear connecting portion and the front-rear connecting portion on the one side. Forming a joint of the front seat support portion at the crossing position, the front seat support portion can be folded back by bending relative to the front-rear connecting portion, and the support portion of the caster serving as the front wheel. and a detachably connectable front wheel mounting portion, and the second joint member includes the rear connecting portion, the front and rear connecting portion on one side, and the rear connecting portion and the front and rear connecting portion on one side. forming a joint of the rear seat support portion at a position intersecting with the front and rear connecting portion, the rear seat support portion being formed to be able to be folded back by bending relative to the front and rear connecting portion, and forming the rear wheel. a rear wheel mounting portion that can be detachably connected to the support portion of the caster; the third joint member forming a joint between the rear seat support portion and the extension portion; on the reference imaginary line connecting one of the front wheels and one of the rear wheels located on the same side of the vehicle body frame; a first section between said joint member and the opposite end of said front seat support; a second section between said first joint member and said second joint member; A third section between the joint member and the third joint member, and the third joint member and the end of the extending portion on the opposite side, at least one adjacent section having a relationship of adjacent sections is the elastic member inserted through the inside of the frame member, characterized by being connected.
(2) In the portable baby carriage described in (1), the seat member has a portion positioned on the front wheel side and a portion positioned on the rear wheel side in a state of being attached to the vehicle body frame. a seat anchoring portion, wherein the end portion of the front seat support portion has the seat anchoring portion disposed on the front wheel side and a vehicle body frame front anchoring portion capable of being anchored; The member is characterized by having the seat mooring portion arranged on the rear wheel side and a vehicle body frame rear mooring portion that can be moored.
(3) In the portable baby carriage described in (1) or (2), the seat member can be converted into a bag that accommodates the body frame in a folded state and the casters in a state removed from the body frame. It is characterized by being formed in such a manner.
(4) In the portable baby carriage described in (3), the backrest portion of the seat member is provided with a pair of safety belts, and the safety belts function as a shoulder harness for the bag. ,
(5) In the portable baby carriage according to any one of (1) to (4), the elastic member is fastened to the joint member in a manner that enables connection or disconnection, and the body frame is characterized in that the constituent frame member can be selectively replaced.
(6) The portable baby carriage according to any one of (1) to (5), wherein the frame member is made of carbon fiber reinforced plastics (CFRP).

The action and effect of the portable baby carriage according to the present invention having the above configuration will be described.

(1) Casters on which wheels are rotatably mounted as front wheels or rear wheels by holding means including support portions, a plurality of hollow frame members, and two or more frame members positioned adjacent to each other , a vehicle body frame having a plurality of joint members that can be connected or disconnected at each end, and a string-like or spiral elastic member that can be freely expanded and deformed, a single-layer fabric, Alternatively, the body frame and a detachable seat member are provided with seat fabrics formed by stacking fabrics in multiple layers, and the body frame includes a front connecting portion arranged between two front wheels, A rear coupling portion located between the rear wheels, a front-rear coupling portion located between the front and rear wheels on the same side, and a front-side coupling portion and one side adjacent to the front-rear coupling portion. The front seat support portion, the rear connection portion, the rear seat support portion arranged adjacent to the front and rear connection portion on one side thereof, and the extension portion arranged in connection with the rear seat support portion are formed of frame members. , the first joint member forms joints of the front connecting portion, the front-rear connecting portion on one side, and the front seat support portion at the position where the front-side connecting portion and the front-rear connecting portion on one side intersect, and is relatively to the front-rear connecting portion; The front seat support part is formed to be foldable by bending, and has a support part for a caster serving as a front wheel and a front wheel mounting part that can be detachably connected. The second joint member is a rear connection part. , the front and back connecting part on one side, and the rear seat support part at the crossing position of the rear connecting part and the front and back connecting part on one side, and the rear seat support part is moved relative to the front and back connecting part by bending. The third joint member is formed to be foldable and has a caster support portion serving as a rear wheel and a detachably connectable rear wheel mounting portion. A joint is formed, and the extension part relative to the rear seat support part is formed so that it can be folded back by bending. On the line, a first section between the first joint member and the opposite end of the front seat support, a second section between the first joint member and the second joint member, a second joint at least one adjacent section of a third section between the member and the third joint member and a fourth section between the third joint member and the opposite end of the extension; Adjacent sections of the points are connected by an elastic member inserted inside the frame member.

Due to this feature, when the portable baby carriage according to the present invention is to be carried without being used, the front and rear wheels (casters) and the seat member are removed from the body frame, and then attached to the body frame as shown in FIG. As illustrated, by removing at least the front seat support from the first joint member, the rear seat support from the second joint member, and the extension from the third joint member, for example, on the back It can be compactized to a small volume so that it can be carried on the back. Therefore, a companion (parent or the like) of an infant can easily carry this portable baby carriage in a folded state.

Therefore, according to the portable baby carriage of the present invention, even when the baby does not ride in the baby carriage and does not use it, the companion of the baby can easily carry the baby carriage.

In the portable baby carriage described in (2), the seat member has a seat mooring portion in each of a portion positioned on the front wheel side and a portion positioned on the rear wheel side in a state where the seat member is mounted on the body frame, The end portion of the front seat support portion has a seat mooring portion arranged on the front wheel side and a vehicle body frame front mooring portion that can be moored, and the third joint member is a seat arranged on the rear wheel side. It is characterized by having a mooring part and a vehicle body frame rear mooring part that can be moored.

With this feature, when a companion of an infant unfolds the folded body frame and assembles the seat member to the body frame, the body frame front mooring part and the body frame rear mooring part are separated from each other. The seat member can be easily attached by simply mooring it to the front and rear seat mooring portions. Similarly, in order for a companion of an infant to compact and carry the portable stroller according to the present invention, it is only necessary to release the front and rear mooring portions of the body frame from the front and rear seat mooring portions. , the seat member can be easily removed from the body frame.

In the portable baby carriage described in (3), the seat member is formed in a manner convertible into a bag that accommodates the body frame in a folded state and the casters removed from the body frame. Characterized by

With this feature, when an infant does not use the portable stroller according to the present invention and a companion of the infant travels with the portable stroller, the companion can use the compact portable stroller according to the present invention. The baby carriage can be housed in a rucksack converted from its seat member and carried in a manner that it can be carried on the back of the rucksack.

The portable baby carriage described in (4) is characterized in that a pair of safety belts is provided on the backrest portion of the seat member, and the safety belts function as a shoulder harness for the bag.

Due to this feature, the safety belt can also be used as a shoulder harness, so there is no need to provide a separate shoulder harness. Therefore, when the portable baby carriage according to the present invention, which is not in use, is carried on the backpack, the number of constituent elements of the backpack is reduced, and the weight becomes lighter, and the physical burden on the accompanying person can be further reduced.

In the portable baby carriage described in (5), the elastic member is fastened to the joint member in a manner that enables connection or disconnection, and the frame member constituting the body frame can be selectively replaced. Characterized by

Due to this feature, in accordance with the growth of the infant riding in the vehicle (including the growth from infant to toddler), the frame members that make up the front and rear joints of the body frame, for example, can be replaced with other frame members of different lengths. For example, the body frame can be partially renewed. Therefore, it becomes unnecessary to purchase a new stroller as the infant grows, and the portable baby carriage according to the present invention can be used in a wide range of times when the infant needs to ride.

The portable stroller described in (6) is characterized in that the frame member is made of carbon fiber reinforced plastics (CFRP).

Due to this feature, it is possible to obtain a greater mechanical strength of the frame member, and to effectively reduce the weight of the body frame, which accounts for most of the weight of the portable baby carriage according to the present invention. Therefore, the total weight of the portable baby carriage according to the present invention is, for example, in the lower half of the 2 kg range, which is less than 3 kg, which is significantly lighter than the conventional baby carriage with a total weight of at least 4 kg or more.

1 is a perspective view showing a portable stroller according to an embodiment; FIG. It is the front view which looked at the portable stroller shown in FIG. 1 from the front. Fig. 2 is a side view of the portable stroller shown in Fig. 1; FIG. 2 is a rear perspective view of the portable stroller shown in FIG. 1 ; FIG. 2 is an explanatory view showing an enlarged extension portion of a vehicle body frame in FIG. 1; It is an explanatory view showing the portable stroller according to the embodiment in a state in which the seat member is disassembled. 3A and 3B are perspective views showing the first joint member configured in the body frame of the portable stroller according to the embodiment, from the view A side, and from the side opposite to the view A, respectively. It is explanatory drawing which shows the 1st joint member shown to FIG. 7(A) partially using sectional drawing. In FIG. 8, it is a cross-sectional view taken along line II. 3A and 3B are perspective views showing the second joint member configured in the vehicle body frame of the portable stroller according to the embodiment, from the B view side and (B) from the opposite side of the B view, respectively; FIG. 11 is an explanatory view showing the second joint member shown in FIG. 10A with the cover removed; It is a cross-sectional view taken along the line II-II in FIG. In FIG. 11, it is a cross-sectional view taken along the line III-III. 8A and 8B are perspective views showing the third joint member configured in the vehicle body frame of the portable stroller according to the embodiment, from the view C side (A) and from the side opposite to the view C (B). It is explanatory drawing which shows the 3rd joint member shown to FIG. 14(A) partially using sectional drawing. In FIG. 15, it is a cross-sectional view taken along line IV-IV. 8A and 8B are perspective views showing the fourth joint member configured in the body frame of the portable stroller according to the embodiment, from the D view side and (B) from the opposite side of the D view, respectively; FIG. 18 is an explanatory view showing the fourth joint member shown in FIG. 17(A) with the cover removed; In FIG. 18, it is a cross-sectional view taken along line VV. FIG. 4 is an explanatory view showing how to disassemble the body frame and casters before folding, when folding the portable stroller according to the embodiment. FIG. 21 is a schematic diagram showing, with a reference virtual line, a portion where the connecting string is stretched within the vehicle body frame in FIG. 20 ; FIG. 21 is an explanatory diagram following FIG. 20 showing the procedure for folding the vehicle body frame; Fig. 2 is a perspective view showing the seat member of the portable stroller according to the embodiment when in use; FIG. 24 is a perspective view showing a state in which the seat material of the seat member shown in FIG. 23 is converted into a rucksack by reversing; FIG. 4 is an explanatory diagram showing how the portable stroller according to the embodiment is stored in a rucksack in a disassembled state;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a portable stroller according to the present invention will now be described in detail with reference to the drawings. A portable stroller according to the present invention is a stroller for carrying an infant. Infants who generally use strollers include newborn infants who cannot sit upright, growing infants who are unable to sit up, and infants who can walk on their own but feel physical fatigue. infants, etc., who wish to ride In this embodiment, the portable baby carriage according to the present invention is mainly intended for infants to be used for such emergency measures, and is a stroller for easy use when going out.

First, an outline of the portable stroller will be described. 1 is a perspective view showing a portable stroller according to an embodiment; FIG. FIG. 2 is a front view of the portable stroller shown in FIG. 1, FIG. 3 is a side view of the portable stroller, and FIG. 4 is a rear perspective view of the portable stroller. FIG. 5 is an explanatory view showing an enlarged extension portion of the vehicle body frame in FIG. FIG. 6 is an explanatory diagram showing the portable stroller according to the embodiment with the seat member disassembled. In this embodiment, in FIG. Define direction. Each drawing after FIG. 2 conforms to the direction defined in FIG.

As shown in FIGS. 1 to 6, the portable stroller 1 (portable baby carriage) is roughly divided into a body frame 2, four casters 50, a seat member 70, and the like. As shown in FIG. 2, the caster 50 is a unit on which wheels 51 are rotatably mounted by holding means 53 including support portions 52 . The portable stroller 1 has two front wheels 51F and two rear wheels 51R.

<Regarding the body frame 2>
The body frame 2 is composed of twelve frame members 10, eight joint members 30, and four connecting cords 80 (elastic members). The connecting string 80 is a rubber string that is formed in a linear segment shape having both ends and is freely stretchable and deformable. As will be described later, the end of the connecting cord 80 is a cord mooring end portion 81 that can be moored or released from the cord fixing portion 37 of the joint member 30 .

The frame member 10 is a hollow pipe member. As shown in FIG. 6, there are a total of 12 frame members 10 forming the vehicle body frame 2, all of which have an outer diameter of about ten and several millimeters. In this embodiment, the frame member 10 is made of carbon fiber reinforced plastics (CFRP) using PAN-based carbon fibers (PAN-based) or pitch-based carbon fibers (pitch-based). The frame member 10 has a specific gravity of 1.5 to 2.0 (g/cm ³ ) and a tensile strength of 1000 to 7000 (MPa), which is several times higher than that of steel, aluminum, etc., although it depends on the specifications. It has excellent mechanical properties such as vibration damping and rigidity.

As shown in FIGS. 2 to 5, the vehicle body frame 2 is structurally composed of a front connecting portion 11, a rear connecting portion 12, a front and rear connecting portion 13, a front seat support portion 14, a rear seat support portion 15, and an extension portion 16. , an extruded portion 17 and an intermediate connecting portion 18 . The front connecting portion 11 is a portion of the frame member 10 arranged between the two front wheels 51F. The rear connecting portion 12 is a portion of the frame member 10 arranged between the two rear wheels 51R. The front-rear connecting portion 13 is a portion of the frame member 10 arranged between the front wheel 51F and the rear wheel 51R on the same side, and has one on each side in the width direction X. As shown in FIG.

The front seat support portion 14 is a portion of the frame member 10 arranged adjacent to the front connecting portion 11 and the front and rear connecting portion 13 on one side in the width direction X, and has one on each side in the width direction X. As shown in FIG. As shown in FIG. 6 , a convex front protrusion 41 (vehicle frame front anchoring portion) is fixed to one end of the front seat support portion 14 . The rear seat support portion 15 is a portion of the frame member 10 arranged adjacent to the rear connecting portion 12 and the front and rear connecting portion 13 on one side in the width direction X, and has one on each side in the width direction X. As shown in FIG.

The extending portion 16 is a portion of the frame member 10 arranged to be connected to the rear seat support portion 15 on one side in the width direction X, and has one on each side in the width direction X. As shown in FIG. In the present embodiment, as illustrated in FIG. 5, the extension portion 16 is divided into two parts, a first extension portion 16a and a second extension portion 16b. The upper end portion of the frame member 10 forming the first extending portion 16a is inserted into the lower end portion of the frame member 10 forming the second extending portion 16b, and the pin is anchored in the pin hole drilled in the second extending portion 16b. , etc., are fixedly connected to this lower tip portion by extension portion fixing means 16c. By changing the position of the pin hole of the second extending portion 16b for mooring the pin and varying the distance of the overlapped portion between the upper end portion of the first extending portion 16a and the lower end portion of the second extending portion 16b, The length of the extension part 16 as a whole is adjustable. In addition, the extending portion 16 may be configured by only one frame member 10 without the function of adjusting the overall length.

The push-out portion 17 is a portion of the frame member 10 arranged between the extending portions 16 on both sides in the width direction X as a portion for manually pushing the portable stroller 1 . As shown in FIG. 6, a handgrip made of resin, rubber, or the like is provided on the outer periphery of the frame member 10 used for the push-out portion 17 so that the push-out portion 17 can be easily gripped by a human hand. there is The intermediate connecting portion 18 is a portion of the frame member 10 arranged along the width direction X between the rear connecting portion 12 and the extrusion portion 17 .

<Regarding Joint Member 30>
The joint member 30 is formed so that it can be freely connected to each end of two or more frame members 10 positioned adjacent to each other or can be disconnected. As shown in FIG. 6, the joint member 30 includes a first joint member 30A (first joint member), a second joint member 30B (second joint member), and a third joint member 30C (third joint member) by function. joint member) and the fourth joint member 30D.

<Regarding the first joint member 30A>
7A and 7B are perspective views showing the first joint member configured in the body frame of the portable stroller according to the embodiment, from the view A side (A) and from the opposite side of the view A (B). . FIG. 8 is an explanatory view partially showing the first joint member shown in FIG. 7(A) using a cross-sectional view, and FIG. 9 shows a cross-sectional view taken along line II in FIG. As shown in FIGS. 6 to 9, the first joint member 30A (joint member 30) includes the front connecting portion 11, the front and rear connecting portion 13 on one side, and the front connecting portion 11 and the front and rear connecting portion 13 on one side. It articulates the front seat support 14 in the crossed position.

Specifically, as shown in FIGS. 7 to 9, the first joint member 30A has a first mounting hole 31a and three radial holes centered on the axial center of the first mounting hole 31a. It has a bottomed second mounting hole 31b, a third mounting hole 31c, and a fourth mounting hole 31d (front wheel mounting portion). An end portion 10E of the frame member 10, which is one end portion of the front connecting portion 11, is inserted into the first mounting hole 31a, and is firmly fixed so as not to come off by fixing means such as screw fastening or press-fitting. are connected by

An end portion 10E of the frame member, which is one side end portion of the front-rear connecting portion 13, is inserted into a second mounting hole 31b having a string insertion hole 35 at the bottom thereof, and is attached and detached based on fitting with the second mounting hole 31b. Ready to be installed. Also, the end portion 10E of the frame member, which is the other end portion of the front seat support portion 14, is inserted into a third mounting hole 31c having a string insertion hole 35 at the bottom, and is fitted with the third mounting hole 31c. Based on this, it is designed to be attached detachably. The string insertion hole 35 provided in the second attachment hole 31b and the string insertion hole 35 provided in the third attachment hole 31c are in communication via a string insertion passage 36. As shown in FIG. The support portion 52 of the caster 50, which serves as the front wheel 51F, is inserted into the fourth mounting hole 31d. Can be freely connected.

<Regarding the second joint member 30B>
10A and 10B are perspective views showing the second joint member configured in the body frame of the portable stroller according to the embodiment, from the view B side (A) and from the side opposite to the view B (B). . FIG. 11 is an explanatory view showing the second joint member shown in FIG. 10(A) with the cover removed. FIG. 13 shows a cross-sectional view taken along line -III. As shown in FIGS. 6 and 10 to 13, the second joint member 30B (joint member 30) includes a rear connecting portion 12, a front and rear connecting portion 13 on one side, a rear connecting portion 12, and this one side. Forms a joint of the rear seat support portion 15 at the crossing position with the front and rear connecting portion 13 .

Specifically, as shown in FIGS. 10 to 13, the second joint member 30B has a first mounting hole 32a and three radial holes centered on the axis of the first mounting hole 32a. It has a bottomed second mounting hole 32b, a third mounting hole 32c, and a fourth mounting hole 32d (rear wheel mounting portion). An end portion 10E of the frame member 10, which is one end portion of the rear connecting portion 12, is inserted into the first mounting hole 32a, and is firmly fixed by a fixing means such as screw fastening or press fitting so as not to come off. connected in a state.

An end portion 10E of the frame member, which is one side end portion of the front-rear connecting portion 13, is inserted into a second attachment hole 32b having a string insertion hole 35 at the bottom, and is attached and detached based on fitting with the second attachment hole 32b. Ready to be installed. An end portion 10E of the frame member, which is one end portion of the rear seat support portion 15, is inserted into a third mounting hole 32c having a string insertion hole 35 at the bottom, and is fitted with the third mounting hole 32c. Based on this, it is designed to be attached detachably. The string insertion hole 35 provided in the second mounting hole 32b communicates with the string insertion passage 36, and the tip side of the string insertion passage 36 is a string fixing portion 37 for anchoring and fixing the string anchoring end portion 81 of the connecting string 80. It has become. Similarly, the string insertion hole 35 provided in the third attachment hole 32c communicates with the string insertion passage 36, and the tip side of the string insertion passage 36 is a string for anchoring and fixing the string anchoring end portion 81 of the connecting string 80. It is a fixed part 37 .

A support portion 52 of a caster 50, which serves as the rear wheel 51R, is inserted into the fourth mounting hole 32d. It can be detachably connected.

<Regarding the third joint member 30C>
14A and 14B are perspective views showing the third joint member configured in the body frame of the portable stroller according to the embodiment, from the view C side (A) and from the opposite side of the view C (B). . FIG. 15 is an explanatory view partially using a cross-sectional view of the third joint member shown in FIG. 14(A), and FIG. As shown in FIGS. 6 and 14 to 16, the third joint member 30C (joint member 30) forms a joint between the rear seat support portion 15 and the extension portion 16. As shown in FIGS.

Specifically, as shown in FIGS. 14 to 16, the third joint member 30C includes a first attachment hole 33a and bottomed bottomed holes that are perforated on both sides of the first attachment hole 33a so as to face each other. It has a second mounting hole 33b, a third mounting hole 33c, and a rear projecting portion 42 (vehicle frame rear anchoring portion) formed in a convex shape radially outwardly and upwardly of the first mounting hole 33a. An end portion 10E of the frame member 10, which is one side end portion of the intermediate connecting portion 18, is inserted into the first mounting hole 33a, and is firmly fixed so as not to come off by fixing means such as screw fastening or press-fitting. are connected by

An end portion 10E of the frame member, which is the other end portion of the rear seat support portion 15, is inserted into a third attachment hole 33c having a string insertion hole 35 at the bottom, and is fitted into the third attachment hole 33c. , is detachably attached. An end portion 10E of the frame member, which is one end portion of the extending portion 16, is inserted into a third attachment hole 33c having a string insertion hole 35 at the bottom thereof, and is attached and detached based on fitting with the third attachment hole 33c. Ready to be installed. The string insertion hole 35 provided in the third mounting hole 33c and the string insertion hole 35 provided in the third mounting hole 33c communicate with each other via a string insertion passage 36. As shown in FIG.

<Regarding the fourth joint member 30D>
17A and 17B are perspective views showing the fourth joint member configured in the vehicle body frame of the portable stroller according to the embodiment, shown from the D view side in (A) and from the opposite side to the D view in (B). . FIG. 18 is an explanatory view showing the fourth joint member shown in FIG. 17(A) with the cover removed, and FIG. 19 shows a sectional view taken along line VV in FIG. As shown in FIG. 6 and FIGS. 17 to 19, the fourth joint member 30D forms a connecting portion that connects the extended portions 16 on both sides in the width direction X and the extruded portion 17. As shown in FIG.

Specifically, as shown in FIGS. 17 to 19, the fourth joint member 30D has a first mounting hole 34a and a center in a direction perpendicular to the axial center of the first mounting hole 34a. bottomed second attachment hole 34b. An end portion 10E of the frame member 10, which is one end portion of the extruded portion 17, is inserted into the first mounting hole 34a, and is firmly fixed so as not to come off by fixing means such as screw fastening or press-fitting. Concatenated. The end portion 10E of the frame member, which is the other end portion of the extension portion 16, is inserted into a second mounting hole 34b having a string insertion hole 35 at the bottom, and can be attached and detached by fitting into the second mounting hole 34b. designed to be mounted on As shown in FIG. 19, the string insertion hole 35 provided in the second attachment hole 34b communicates with the string insertion passage 36, and the tip side of the string insertion passage 36 anchors the string anchoring end portion 81 of the connecting string 80. It is a string fixing portion 37 that is fixed by pressing.

<Regarding the folding structure of the body frame 2>
FIG. 20 is an explanatory view showing how to disassemble the body frame and casters before folding the portable stroller according to the embodiment. FIG. 21 shows a schematic diagram showing the portion where the slanted portion is indicated by a reference virtual line. FIG. 22 is an explanatory diagram showing the folding procedure of the vehicle body frame following FIG. 20 .

In the portable stroller 1 of this embodiment, the body frame 2 is folded in a smaller size. Therefore, as shown in FIG. It is formed to be foldable by bending, and the rear seat support portion 15 is formed to be foldable by bending relative to the front-rear connecting portion 13 . Further, the rear seat support portion 15 and the extending portion 16 are formed so as to be foldable by bending.

A specific description will be given. As shown in FIGS. 20 to 22, on both sides in the width direction X of the vehicle body frame 2, in this embodiment, two connecting cords 80 are connected to the front seat support portion 14 positioned on the reference virtual line L, the front and rear A total of four frame members 10 forming a connection portion 13 , a rear seat support portion 15 and an extension portion 16 are stretched on the inside 10N of the frame member 10 . One connecting string 80 is inserted through the interior 10N of the frame member 10 . As shown in FIG. 21, the reference virtual line L is a virtual line connecting one front wheel 51F and one rear wheel 51R located on the same side of the vehicle body frame 2 in the width direction X direction. It includes one section D1 (first section), a second section D2 (second section), a third section D3 (third section), and a fourth section D4 (fourth section).

The first section D1 is a section between the string insertion hole 35 of the third attachment hole 31c of the first joint member 30A and the end portion 14E of the front seat support portion on the front protrusion 41 side. The second section D2 is a section between the string insertion hole 35 of the second mounting hole 31b of the first joint member 30A and the string insertion hole 35 of the second mounting hole 32b of the second joint member 30B. The third section D3 is a section between the string insertion hole 35 of the third mounting hole 32c of the second joint member 30B and the string insertion hole 35 of the second mounting hole 33b of the third joint member 30C. The fourth section D4 is the second attachment hole 34b of the fourth joint member 30D as the joint member 30 connected to the string insertion hole 35 of the third attachment hole 33c of the third joint member 30C and the end portion 16E of the extension portion 16. It is a section with the string insertion hole 35 provided in.

Adjacent sections having a relationship of adjacent sections on the reference virtual line L are the first section D1 and the second section D2, the second section D2 and the third section D3, and the third section D3 and the fourth section D4. , in this embodiment, the first section D1 and the second section D2 are continuously connected by one connecting string 80 . Further, the third section D3 and the fourth section D4 are continuously connected by another connecting string 80. - 特許庁

One connecting cord 80 is attached to the inside of the end portion 14E of the front seat support portion (not shown) at one end 81 of the connecting cord 80, and is attached to the front seat support portion as shown in FIGS. 14, the first joint member 30A, and the front-rear connecting portion 13, and is stretched in the string insertion hole 35 provided in the second attachment hole 32b of the second joint member 30B. In the first joint member 30A, one connecting cord 80 is, as shown in FIGS. It is inserted through the insertion hole 35 . As shown in FIGS. 10 to 12, the string anchoring end 81 on the opposite side of one connecting string 80 is anchored and fixed to the string fixing portion 37 from the string insertion hole 35 through the string insertion passage 36. It is

The other connecting cord 80 has a cord anchoring end 81 on one side fixed to the second joint member 30B, and passes through the rear seat support portion 15, the third joint member 30C, the extension portion 16, and vice versa. The string anchoring end 81 on the side is fixed and stretched to the fourth joint member 30D. Specifically, in another connecting cord 80, as shown in FIGS. 11 and 13, the cord mooring end portion 81 on one side of the connecting cord 80 is inserted through the cord insertion hole 35 provided in the third attachment hole 32c of the second joint member 30B. , through the string insertion passage 36 , and fixed to the string fixing portion 37 . In the third joint member 30C, as shown in FIGS. 14 to 16, the other connecting cord 80 is a cord inserted in the cord insertion hole 35, the cord insertion passage 36, and the third mounting hole 33c of the second mounting hole 33b. It is inserted through the insertion hole 35 . As shown in FIGS. 17 to 19, the string anchoring end portion 81 on the opposite side of the other connecting string 80 is passed through the string insertion passage 36 from the string insertion hole 35 provided in the second attachment hole 34b, and the string is fixed. It is anchored and fixed to the portion 37 .

In this manner, in the front seat support portion 14, the front-rear connection portion 13, the rear seat support portion 15, and the extension portion 16 along the reference virtual line L, the connection string 80 is inserted through the interior 10N of the frame member 10, It is fastened and stretched to the joint members 30 (the first joint member 30A, the second joint member 30B, the third joint member 30C, the fourth joint member 30D). The elastic force of the connecting cord 80 draws the cord anchoring end portion 81 wider than the cord insertion passage 36 to the cord fixing portion 37, and the cord anchoring end portion 81 and the cord fixing portion 37 are anchored and fixed. Therefore, the mooring with the string fixing portion 37 can be freely released by, for example, changing the direction of the string mooring end portion 81 that is moored with respect to the string fixing portion 37 . The frame member 10 through which the connecting cord 80 is inserted can be removed from the joint member 30 after the cord mooring end portion 81 that has been released from the mooring with the cord fixing portion 37 is removed from the joint member 30 .

Therefore, in the vehicle body frame 2, for the purpose of replacing the frame member 10 with a larger frame member 10 according to the growth of the infant riding in the portable stroller 1 (including the growth from an infant to a toddler), the front and rear parts on the reference imaginary line L are arranged. The frame member 10 that constitutes the connecting portion 13, the front seat supporting portion 14, the rear seat supporting portion 15, and the extension portion 16 can be selectively replaced, for example, only the front and rear connecting portion 13 can be partially replaced. can be

In this embodiment, the vehicle body frame 2 is divided into the first section D1 and the second section D2, and the third section D3 and the fourth section D4. However, the first section D1 to the fourth section D4 may be continuously connected with one connecting string 80 and stretched.

By the way, as shown in FIG. 22, when folding the vehicle body frame 2, the front seat support portion 14 positioned in the first section D1 is bent toward the front-rear connecting portion 13 positioned in the second section D2. Along with being folded, the rear seat support portion 15 located in the third section D3 is also folded by bending. Further, the extending portion 16 positioned in the fourth section D4 is folded in a form overlapping with the folded back side seat support portion 15 by bending.

At this time, the front seat support portion 14 is removed from the first joint member 30A and disconnected from the third mounting hole 31c, and the rear seat support portion 15 is removed from the second joint member 30B. The connection with the third attachment hole 32c is released. Similarly, the extension 16 is removed from the third joint member 30C to disconnect from the third attachment hole 33c. Therefore, of the reference imaginary line L, the first section D1 and the third section D3 are stretched to the second section D2 by the connecting string 80, and the fourth section D4 is stretched by the connecting string 80. , and the third section D3, the front seat support portion 14, the rear seat support portion 15, and the extension portion 16 are connected to the front-rear connection portion 13 when the body frame 2 is folded. is maintained. Therefore, when a person unfolds the body frame 2 in a folded state in accordance with the use of the portable stroller 1, the work can be easily performed.

As shown in FIG. 22, when the vehicle body frame 2 is in a folded state, in the connection structure between the first joint member 30A and the front connecting portion 11, the front connecting portion 11 is removed from the first joint member 30A. In the connection structure between the second joint member 30B and the rear connecting portion 12, it is preferable that the rear connecting portion 12 can be removed from the second joint member 30B. Similarly, in the connection structure between the third joint member 30C and the intermediate connection portion 18, the intermediate connection portion 18 can be removed from the third joint member 30C, and in the connection structure between the fourth joint member 30D and the extrusion portion 17, It is preferable that the pushing portion 17 can be removed from the fourth joint member 30D. This connection structure makes it possible to reduce the overall volume of the disassembled vehicle body frame 2 and, as will be described later, to easily fit in a rucksack 70X (bag) converted from the seat member 70. be.

<Regarding the seat member 70>
Next, the seat member 70 will be explained. In this embodiment, the seat member 70 is made of a seat fabric 72 in which fabrics such as cloth, resin fabric, etc. are stacked in two layers (bag shape), as shown in FIGS. It is formed detachably. Specifically, as shown in FIG. 4, the seat member 70 has a lid portion 75 on one of the two layers of fabric.

In addition, the seat member 70 has a total of four seat mooring portions, two each at the corner portion positioned on the front wheel 51F side and the corner portion positioned on the rear wheel 51R side, when mounted on the vehicle body frame 2. 71. The seat mooring portion 71 on the front wheel 51F side is a hole that can be moored by inserting the front projection portion 41 on the front side seat support portion 14 of the body frame 2, and can be freely attached to and detached from the front projection portion 41. is. The seat mooring portion 71 on the rear wheel 51R side is a hole that can be moored by inserting the rear projection portion 42 on the third joint member 30C of the vehicle body frame 2, and can be freely attached to and detached from the rear projection portion 42. It is possible.

As shown in FIGS. 1 to 6, the seat member 70 is arranged in the width direction X and the front-rear direction Y when the four seat anchoring portions 71 are anchored to the two front protrusions 41 and the two rear protrusions 42. It is stretched in a moderately stretched state with respect to the height direction Z. As a result, the seat member 70 has a deep-bottomed form that allows an infant to ride in a posture that envelops the body with a deep bottom, just like a bucket seat. A pair of safety belts 73 are provided on the backrest portion of the seat member 70 . The safety belt 73 can be freely adjusted within the range of the length required to firmly hold the infant sitting on the seat member 70 and the length required to be hung on the shoulders of the adult pushing the portable stroller 1. It's like

FIG. 23 is a perspective view showing the seat member of the portable stroller according to the embodiment when in use, and is a perspective view showing a state in which the seat material of the seat member shown in FIG. 23 is turned over and converted into a backpack. , as shown in FIG. FIG. 25 is an explanatory diagram showing how the portable stroller according to the embodiment is stored in a rucksack in a disassembled state.

As shown in FIGS. 23 to 25, the seat member 70 can be converted into a bag that accommodates the body frame 2 in a folded state and the four casters 50 that are removed from the body frame 2. formed. Specifically, the seat member 70 shown in FIG. 23 accommodates an internal space formed by reversing the direction of the seat fabric 72 at the backrest portion and separating the fabrics of the two-layered seat fabric 72 from each other. It is converted into a rucksack 70X (bag) with a portion 74 . The safety belt 73 of the seat member 70 functions as a shoulder harness 73X of the backpack 70X by adjusting its length. The rucksack 70X has a storage portion 74 and a lid portion 75 that closes the storage portion 74, which are anchored by a fastening portion 76 using a well-known technique.

Thus, as shown in FIG. 25, the portable stroller 1 can be housed in the housing portion 74 of the rucksack 70X with the body frame 2 in the folded state and the four casters 50 disassembled. When the infant does not use the portable stroller 1, a companion (parent or the like) of the infant can carry the folded portable stroller 1 in a backpack 70X.

Next, functions and effects of the portable stroller 1 according to this embodiment will be described.

The portable stroller 1 according to the present embodiment includes casters 50 on which wheels 51 are rotatably mounted as front wheels 51F or rear wheels 51R by holding means 53 including support portions 52, and a plurality of hollow wheels. A plurality of joint members 30 (first joint member 30A, second joint member 30B, A body frame 2 having a third joint member 30C and a fourth joint member 30D), a string-like connecting string 80 that can be freely stretched and deformed, and a sheet fabric 72 made by stacking fabrics in two layers. , a body frame 2 and a detachable seat member 70. In the body frame 2, a front connecting portion 11 arranged between the two front wheels 51F and a seat member 70 arranged between the two rear wheels 51R. , the front-rear connection part 13 arranged between the front wheel 51F and the rear wheel 51R on the same side, the front-side connection part 11 and the front-rear connection part 13 arranged adjacent to the front-rear connection part 13 on one side thereof A seat support portion 14, a rear connecting portion 12, a rear seat supporting portion 15 arranged adjacent to the front and rear connecting portion 13 on one side thereof, and an extending portion 16 arranged in connection with the rear seat supporting portion 15. , the frame member 10, and the first joint member 30A includes the front connecting portion 11, the front-rear connecting portion 13 on one side, and the front seat support portion 14 at the intersection of the front connecting portion 11 and the front-rear connecting portion 13 on one side. A joint is formed so that the front seat support part 14 can be folded back by bending relative to the front and rear connection part 13, and a front wheel attachment that can be detachably connected to the support part 52 of the caster 50 serving as the front wheel 51F. The second joint member 30B includes the rear connecting portion 12, the front-rear connecting portion 13 on one side, and the rear seat support portion at the intersection of the rear connecting portion 12 and the front-rear connecting portion 13 on one side. 15 joints are formed, and the rear side seat support portion 15 is formed so as to be able to be folded back by bending relative to the front and rear connection portion 13, and is detachably connected to the support portion 52 of the caster 50 serving as the rear wheel 51R. The third joint member 30C forms a joint between the rear seat support portion 15 and the extension portion 16, and bends the extension portion 16 relative to the rear seat support portion 15. In the body frame 2, on the reference imaginary line L connecting the one front wheel 51F and the one rear wheel 51R located on the same side, the first joint member 30A and the opposite side thereof before A first section D1 between the end portion 14E of the side seat support portion 14, a second section D2 between the first joint member 30A and the second joint member 30B, and a third section between the second joint member 30B and the third joint member 30C. Among D3 and the fourth section D4 between the third joint member 30C and the end portion 16E of the extending portion 16 on the opposite side, at least one adjacent section having a relationship of adjacent sections is the frame member 10. It is characterized by being connected by a connecting string 80 inserted through the inside 10N.

Due to this feature, when the portable stroller 1 is to be carried without being used, the front wheels 51F and rear wheels 51R (casters 50) and the seat member 70 are removed from the body frame 2. As shown in FIG. 21, at least the front seat support portion 14 is removed from the first joint member 30A, the rear seat support portion 15 is removed from the second joint member 30B, and the extension portion 16 is removed from the third joint member 30C. For example, it can be compacted to a small volume so that it can be carried with a rucksack 70X. Therefore, a companion (parent or the like) of an infant can easily carry the portable stroller 1 in a folded state.

Moreover, even if the connection between the frame member 10 and the joint member 30 is released due to the removal of the front seat support portion 14 from the first joint member 30A or the like, the frame member 10 and the joint member 30 are still connected by the connecting string 80. Therefore, they are not completely separated. Therefore, when a person assembles the portable stroller 1 in a folded state into a use state in which a person can ride on it, the corresponding frame members such as the connection between the first joint member 30A and the front seat support portion 14 are required. 10 and the joint member 30 can be connected without mistake, and the portable stroller 1 in the folded state can be assembled reliably and easily.

Therefore, according to the portable stroller 1 according to the present embodiment, even when the infant is not using it, a companion (parent or the like) of the infant can easily carry the portable stroller 1 in a folded state. effect.

In addition, in the portable stroller 1 according to the present embodiment, the seat member 70 has a portion positioned on the side of the front wheel 51F and a portion positioned on the side of the rear wheel 51R when mounted on the vehicle body frame 2. An end portion 14E of the front seat support portion 14 has a seat anchoring portion 71 arranged on the front wheel 51F side and a front protrusion 41 that can be anchored. , a seat mooring portion 71 arranged on the side of the rear wheel 51R, and a rear projection portion 42 which can be moored.

With this feature, when an infant gets into the portable stroller 1 while feeling physical fatigue from walking, the folded body frame 2 is unfolded and the seat member 70 is moved to the body. When assembling to the frame 2 , the companion of the infant can easily attach the seat member 70 by simply inserting the front projection 41 and the rear projection 42 into the front and rear seat anchoring portions 71 . Therefore, even in a situation where an infant is quickly put in the portable stroller 1 as an emergency measure, the accompanying person can skillfully assemble the folded portable stroller 1.例文帳に追加

On the contrary, when an infant gets off the portable stroller 1 and walks by himself/herself, in order to carry the portable stroller 1 in a compact form, the companion lifts up the front and rear seat anchoring portions 71 and the forward protrusions 41 The seat member 70 can be easily removed from the vehicle body frame 2 simply by separating it from the rear protrusion 42.例文帳に追加Therefore, the companion can neatly fold and put away the portable stroller 1 that has been used until now.

In addition, in the portable stroller 1 according to the present embodiment, the seat member 70 can be converted into a backpack 70X that accommodates the body frame 2 in a folded state and the casters 50 removed from the body frame 2. characterized by being formed.

With this feature, when an infant does not use the portable stroller 1 and a companion of the infant travels with the portable stroller 1, the companion can use the compact portable stroller 1 with its seat member 70. It can be stored in the storage part 74 of the backpack 70X converted from , and can be carried in a manner that it can be carried on the backpack 70X.

In particular, when a companion has a stroller and goes out with an infant, other than the luggage of the companion, for example, food and drink such as juice and snacks, toys such as toys and picture books, diapers and wet towels Special luggage for infants is required extra, as listed in hygiene products. Therefore, companions generally carry a lot of baggage when they go out. Therefore, even if the companion takes an infant and carries some baggage, the companion can carry the portable stroller 1 that is not in use on his or her back with the backpack 70X, thereby reducing the body weight of the companion. The physical burden can be significantly reduced compared to carrying a conventional stroller. In addition, the accompanying person can carry the portable stroller 1 that is not in use on their back with the backpack 70X. , you will be able to move without difficulty.

In addition, in the portable stroller 1 according to the present embodiment, the seat member 70 is provided with a pair of safety belts 73 at the backrest portion, and the safety belt 73 serves as a shoulder harness 73X for the backpack 70X. characterized by functioning.

With this feature, the safety belt 73 can also be used as the shoulder harness 73X, so there is no need to provide a separate shoulder harness. Therefore, when the portable stroller 1 that is not in use is carried on the back of the backpack 70X, the number of constituent elements of the backpack 70X is reduced, making it lighter and further reducing the physical burden on the companion.

In addition, in the portable stroller 1 according to the present embodiment, the connecting string 80 is fastened to the second joint member 30B and the fourth joint member 30D in such a manner that it can be connected or released. It is characterized in that the constituting frame member 10 can be selectively replaced.

Due to this feature, the frame member 10 forming, for example, the front and rear connecting portions 13, etc., of the body frame 2 has different lengths according to the growth of the infant riding in the portable stroller 1 (including the growth from an infant to an infant). The vehicle body frame 2 can be partially renewed, such as by replacing it with another frame member 10 of different length. Therefore, it is not necessary to buy a new stroller as the infant grows, and the portable stroller 1 can be used in a wide range of times when the infant needs to ride.

Further, the portable stroller 1 according to the present embodiment is characterized in that the frame member 10 is made of carbon fiber reinforced plastics (CFRP).

Due to this feature, the frame member 10 can have a greater mechanical strength, while the body frame 2, which accounts for most of the weight of the portable stroller 1, can be effectively reduced in weight. Therefore, the total weight of the portable stroller 1 is, for example, in the lower half of the 2 kg range, less than 3 kg.

In the above, the portable baby carriage according to the present invention has been described in accordance with the embodiments, but the portable baby carriage according to the present invention is not limited to the embodiments, and can be modified as appropriate without departing from the scope of the invention. Can be modified and applied.

(1) For example, in the embodiment, the seat member 70 and the backpack 70X converted from the seat member 70 are formed of the sheet fabric 72 in which the fabrics are stacked in two layers (bag shape). However, the seat member is made of a slightly large single-layered fabric, and in FIG. On the other side, it may be converted into a bag similar to the rucksack 70X by connecting with connecting means such as buttons and hooks.

(2) In the embodiment, the folding form of the body frame 2 is shown in FIG. The site for performing is not limited by the embodiment, and can be changed as appropriate.

1 portable stroller (portable stroller)
2 Body frame 10 Frame member 10E End portion 10N of frame member Interior of frame member 11 Front connecting portion 12 Rear connecting portion 13 Front and rear connecting portion 14 Front seat support portion 14E End portion 15 of front seat support portion Rear seat support portion 16 Extended portion 16E End portion 30 of extended portion Joint member 30A First joint member (joint member, first joint member)
31d Fourth mounting hole (front wheel mounting part)
30B second joint member (joint member, second joint member)
32d Fourth mounting hole (rear wheel mounting part)
30C third joint member (joint member, third joint member)
41 front protrusion (front mooring portion of body frame)
42 rear protrusion (rear mooring portion of body frame)
50 caster 51F front wheel 51R rear wheel 52 support portion 53 holding means 70 seat member 70X rucksack (bag)
71 seat mooring portion 72 seat fabric 73 safety belt 73X shoulder harness 80 connecting string (elastic member)
L Reference virtual line D1 First section (first section)
D2 second section (second section)
D3 third section (third section)
D4 fourth section (fourth section)

Claims (6)

a caster on which a wheel is rotatably mounted as a front wheel or a rear wheel by holding means including a support;
a plurality of frame members formed in a hollow shape; a plurality of joint members capable of being connected or disconnected to each end of two or more of the frame members positioned adjacent to each other; , an elastic member that can be freely stretched and deformed; and
a seat member formed detachably from the vehicle body frame by a single-layered fabric or a seat fabric made by stacking the fabrics in multiple layers,
In the vehicle body frame, a front connecting portion arranged between the two front wheels, a rear connecting portion arranged between the two rear wheels, and between the front wheel and the rear wheel on the same side. the front connection portion and the front seat support portion arranged adjacent to the front and rear connection portion on one side thereof; the rear connection portion and the rear connection portion arranged adjacent to the front and rear connection portion on one side thereof; The rear seat support portion connected to the rear seat support portion and the extension portion arranged in connection with the rear seat support portion are formed of the frame member,
The first joint member forms joints of the front connecting portion, the front-rear connecting portion on one side, and the front seat support portion at a position where the front connecting portion and the front-rear connecting portion on one side intersect, The front seat support portion is formed to be able to be folded back by bending relative to the front and rear connection portion, and has a front wheel attachment portion that can be detachably connected to the support portion of the caster serving as the front wheel,
The second joint member connects the joints of the rear connecting portion, the front-rear connecting portion on one side, and the rear seat support portion at an intersection position between the rear connecting portion and the front-rear connecting portion on one side. None, the rear seat support portion is formed to be foldable by bending relative to the front-rear connection portion, and a rear wheel detachably connectable to the support portion of the caster serving as the rear wheel having a mounting portion;
the third joint member forms a joint between the back seat support portion and the extension portion, and is formed so that the extension portion can be folded back by bending relative to the back seat support portion;
In the vehicle body frame, the first joint member and the end portion of the front seat support portion on the opposite side on a reference imaginary line connecting the one front wheel and the one rear wheel located on the same side. a first section of, a second section between the first joint member and the second joint member, a third section between the second joint member and the third joint member, and the third At least one adjacent section having a relationship of adjacent sections among the fourth section between the joint member and the end portion of the extending portion on the opposite side thereof is connected to the elastic member inserted inside the frame member. that are connected by components,
A portable pram characterized by: The portable stroller according to claim 1,
The seat member has seat mooring portions in a portion positioned on the front wheel side and a portion positioned on the rear wheel side when mounted on the vehicle body frame,
The end portion of the front seat support portion includes the seat anchoring portion arranged on the front wheel side and a vehicle body frame front anchoring portion capable of being anchored,
the third joint member includes the seat anchoring portion arranged on the rear wheel side and a vehicle body frame rear anchoring portion that can be anchored;
A portable pram characterized by: In the portable stroller according to claim 1 or claim 2,
The seat member is formed in such a manner that it can be converted into a bag for housing the body frame in a folded state and the casters in a state detached from the body frame;
A portable pram characterized by: In the portable stroller according to claim 3,
The backrest portion of the seat member is provided with a set of two safety belts,
the safety belt functions as a shoulder harness for the bag;
A portable pram characterized by: In the portable stroller according to any one of claims 1 to 4,
The elastic member is fastened to at least one of the first joint member, the second joint member, and the third joint member in such a manner that connection or disconnection thereof is possible. ,
In the vehicle body frame, the frame member constituting the body frame can be selectively replaced;
A portable pram characterized by: In the portable stroller according to any one of claims 1 to 5,
the frame member is made of carbon fiber reinforced plastics (CFRP);
A portable pram characterized by:

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