JP2001151119A - Collapsible baby jogging stroller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a frame structure serving as a rigid platform for a jogging stroller. SOLUTION: The frame structure comprises a frame member serving as a main structural body, a fork for receiving a mounting block assembly, a rear axle rotatably supporting a pair of wheels at its ends, a generally inverted- U-shaped handle member, a T-shaped interconnect mechanism, and a cam lever means pivotally supported against the rear axle. The interconnect mechanism and the cam lever means are in interactive engagement with each other so that the handle member can be relatively displaced to a first locking position where it is in a standing position during use and a second position in which the handle member makes pivotal movement to fold the frame assembly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a baby carrier or a wheelbarrow, and more particularly, to a wheelbarrow for carrying an infant with a sluggish movement.

[0002]

BACKGROUND OF THE INVENTION Baby pushcarts generally include an infant seating area and three or four wheel assemblies, which may be provided with a plurality of wheel sets. Recently, wheelchairs have evolved to have a running function or a bumpy walking function in order to obtain a mental state and physical comfort. Such a device is referred to herein as a "jogging wheelbarrow," which allows parents and others to perform jogging and even running exercises while pushing the baby inside.

[0003]

It is an object of the present invention to provide a frame structure that provides a solid platform for a jogging handcart.

[0004]

SUMMARY OF THE INVENTION In order to provide such a robust platform, wheelbarrow designs include large diameter spoked wheels and pneumatic tires that are approximately equivalent to those of elementary school bicycles. In addition, to reduce the weight of the wheelbarrow, the structure of the seat portion is usually made of a flexible cloth-like material, while the frame assembly is made of a tubular structure, for example an aluminum tube, which It offers strength while reducing weight. Some of such jogging wheelbarrows can be disassembled and folded, or both, for storage and transportation, and can be stored.

[0005] In one aspect, the present invention is a jogging wheelbarrow with a removable wheel and a collapsible frame that can be easily assembled and disassembled.
This wheelbarrow is compact, stable and lightweight.

[0006]

According to the present invention, a removable wheel,
A three wheeled jogging trolley having a removable cloth seat and a foldable frame assembly is provided. The frame assembly is provided with a first front and rear main structure and a rear axle assembly, the rear axle assembly having a cylindrical member having an enlarged diameter, and having a coupler provided at both ends to provide a large structure. Supporting a diameter spoked wheel and a pneumatic tire, the axle is inclined so that the wheel expands downwards with respect to the ground. A generally U-shaped handle member is secured to the rear axle tube and is sized, shaped, and positioned for convenient gripping by a user.

A T-shaped interconnection mechanism is provided,
The leg is fixed to one end of the frame member,
The crossbar portion is adapted to receive a tube of the rear axle assembly therein in a vertical relationship with the main structure. The interconnecting mechanism is further provided with a cam lock device, which is capable of selecting relative sliding movement between the rear axles in the crossbar portion, wherein in the first locked position the handle member is generally connected to the main structure. Located generally transverse to the plane formed by the rear axle tube, in a second unlocked position, the handle and rear axle assembly pivot toward the main structure to move the handle closer to the main structure. It is designed to be positioned.

[0008] The front end of the main structure is fixed to the front fork receiving block assembly, and a footrest is provided on the structure above the assembly. The block assembly has a vertical sleeve bearing or bushing therethrough, which is adapted to receive a fork assembly caster post for the front wheel. The fork assembly and the block assembly are configured and arranged to engage and cooperate to pivot the movement of the front wheel in two positions: a first locked straight forward position and an angle of about 180 degrees. It is possible to select one of the caster positions. Other objects, features and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings. Corresponding members are provided with similar reference numerals in the several figures.

[0009]

FIG. 1 is a perspective view showing a foldable frame of a pushcart according to the present invention with a part thereof separated. FIG. 2 is a front wheel fork and a fork in the foldable frame of the pushcart of FIG. FIG. 3 is a perspective view of the receiving block mounting assembly, FIG. 3 is a cross-sectional view of the front wheel mounting assembly along line 3-3 in FIG. 2, FIG. 4 is a side view of the assembled foldable frame of FIG. FIG. 6 is an enlarged side elevational view of a portion of the rear wheel assembly of the foldable frame of the pushcart of FIG. 1; FIG. 6 and FIG. 7 are front wheel forks and forks along lines 6, 7-6, 7 of FIG. It is sectional drawing which showed the caster post of the fork member in the lock release position and the lock position in the sectional view of the receiving block mounting assembly, respectively.

FIG. 8 is a plan view of the caster thrust bearing plate of the fork mechanism taken along line 8-8 of FIG. 6, FIG. 9 is a partially cutaway bottom view of the T-shaped interconnection mechanism of the rear axle tube and center frame member, FIG.
0 is a partially broken plan view of the T-shaped interconnection mechanism of the rear axle tube and the center frame member, and FIG.
12 and 13 are cross-sectional views of the T-shaped interconnection mechanism taken along line 11-11 of FIG.
FIG. 14 is a rear view of the T-shaped interconnection mechanism, showing the cam lock lever in an unlocked position and a locked position, respectively, along the rear view of FIG. 13; FIG. 14 is a cross-section of the T-shaped interconnection mechanism of FIG. FIG.

FIGS. 15-17 are side views of the foldable frame of FIG. 1 with the rear wheel and front wheel assemblies removed and the frame moved from an upright position to a folded position in first, second, and third positions. FIG. 18 is a perspective view of a foldable frame of a pushcart according to the present invention, with a flexible cloth seat and a canopy member attached for use in jogging, and FIG. 19 is a perspective view of FIG. FIG. 20 is a side view of the assembled jogging handcart of FIG.
8 is a bottom view of the assembled jogging wheelbarrow, FIG.
FIG. 22 is a schematic view showing the caster thrust bearing plate moving relative to the front fork receiving block assembly in its pivoted position, and FIG. 23 is a slider used in the front fork receiving block assembly to hold the fork therein. FIG. 24 is an enlarged plan view of the latch, and FIG. 24 is a sectional view of the slider latch of FIG.

In accordance with the present invention, a frame assembly for a jogging handcart will be described. The frame is T-shaped and provided with a mechanism for interconnection, which allows the rear axle (and the handle fixed thereto) to be selectively moved with respect to the main structure, the axle / handle assembly The three-dimensional body is pivoted in the connection part so that the unit can be folded or folded. The wheel coupler can be easily removed, as can the wheelbarrow canopy (framed roof) and seating device. As a further feature, the front wheel of the three-wheel arrangement is mounted on a fork, which has an indexed thrust bearing disc, on the outer periphery of which a manual selection of one of the two travel positions of the front wheel is possible. It can be chosen between a position that pivots about 180 degrees and a fixed position that moves along the same line as the main structure.

Referring to FIG. 1, which shows the entirety of the present invention, a foldable frame assembly 30 is shown, which is used in a three-wheel jogging wheelbarrow. The frame assembly 30 has a generally T-shaped frame structure, which comprises a main structure member 34, a rear axle tube 36, and a T-shaped interconnection mechanism 40. The generally inverted U-shaped handlebar 50 has parallel bars 50a and 50b, the free ends of which are firmly fixed to the axle tube 36 by welding or the like. In the position where it is used, the handle 50 extends upward and is folded back through two steps, as is clearly shown in FIG. That is, the intermediate portion 50c is bent at two different angles so as to be in a position convenient for the user. The intermediate portion 50c is preferably covered with a friction sleeve, such as a synthetic rubber or plastic tube 51.

A front fork receiving block assembly 60 (FIG. 2) is fixed to the front end of the main structural member 34, and a footrest 61 is mounted on the structural member 34 on the assembly 60. 6-8, the block assembly 60 is a vertical sleeve bearing or bush 6.
4 through which the caster post or spindle 46b of the fork assembly 46 for the front wheel
Can be accepted. The front wheel side pneumatic tire 44 is a fork 46 of a fork assembly 46.
a, the fork assembly 46 has a spindle or shank 46b on top of the caster thrust bearing disc 46c. The shank 46b is a hollow cylindrical portion having an outer diameter sized to receive the fork sleeve bearing 54 (FIGS. 6-8) of the fork receiving block assembly 60, as described below.

Fork assembly 46 and block assembly 6
0 engage each other so that the movement position of the front wheel 44 can be manually selected between two positions: a first locked straight forward position and a swivel caster position that pivots through an angle of about 180 degrees. Shaped and arranged. To achieve this, the fork assembly 4
6, a lock disk or thrust bearing 46c is provided between the fork 46a and the caster post or the spindle 46b. In particular, in FIG. 8, the outer periphery of the thrust bearing disc 46c is formed with a reduced diameter edge 46d which extends over an angle of about 180 degrees and has a notch 46e diametrically opposite the midpoint of the arc 46d. Is formed. As described later, when the lock notch 46e is engaged, the fork 46a
And the wheel 44 will be positioned along the line of the member 34. When the arcuate edge 46d engages, the wheel 44 is free to pivot through an angle of about 180 degrees. As described later, the spindle 46b is received in the sleeve bearing 64 in an open state.

In FIGS. 1, 3 and 4 (as well as FIGS. 15 to 20), both ends of a generally U-shaped canopy bracket 52 are fitted with a suitably spring-loaded fitting 5.
3, 54 (FIG. 3), these fittings are fixed on the sides of the handle uprights 50a, 50b. Triangular eyelet or D-ring 5
3a and 54a are mounted at the same position to fix a flexible cloth-like seat arrangement as described later.

The rear axle assembly has an axle 36 consisting of an enlarged diameter tube structure, with a coupler at its opposite end removably supporting the large diameter spoked wheel pneumatic tires 42,43. The axle is tilted so that the wheel can expand downwards relative to the ground. Pneumatic tire rear wheel 42,
43 is a suitable cam lever opening mechanism 48 (FIG. 5)
Thus, it is releasably attached to the rear axle 36. The cam lever opening mechanism 48 is described in detail in Applicant's U.S. patent application Ser. No. 09/342032, but does not constitute the present invention.

Now that the main components have been described, the details will be described. The main structure member 34 is formed of a metal tubular member, for example, aluminum, and has a pair of aligned and opposed protruding stubs 34.
a (only one of which is shown in FIGS. 1 and 2), these stubs are also used to support a generally L-shaped footrest 62, which is
5 and fixed to the stub 34a. The leading edge of the footrest 61 (the forward edge when moving) is provided with a slight bulge, which is configured to lie on the fork receiving block assembly 60. As shown in FIGS. 1, 2, 6, and 7, the block assembly 60 is secured to the leading edge of the main structural member 34, and a sleeve bearing 64 extends through the block 60 and the frame member 34 and extends in the longitudinal direction of the bearing 64. The centerline is generally perpendicular (or at right angles) to the surface on which the jogger rides during use.

As shown in FIGS. 6 and 7, and more particularly in FIGS.
a is generally flat, and the block 60 has a post 63 integrally formed so as to hang from this lower surface, and the post 63 is slightly smaller than the radius of the arc-shaped edge of the caster thrust bearing 46c with respect to the center line of the bearing 64. Located a large distance apart, this radius also corresponds to the radius of the seat portion of the notch 46e. Spindle 4
By suitably removing and rotating 6b,
The notch 46e or the arcuate edge 46d can remain close to the post 63.

As shown in FIGS. 6 and 7, a slider latch 68 is slidable into a slot 69 formed in the upper end of the block assembly 60 to allow for holding tension while releasing the fork assembly 46. Attached to. 23 and 24, the slider latch 68
Has a concave surface 68a in its inner portion, generally in the form of a bar of fixed thickness, having a keyhole-shaped opening 71 therein, the large diameter of which The slot portion of the keyhole-shaped opening 71 has a width slightly larger than the diameter of the shank of the bolt 70, slightly larger than the diameter of the head of the bolt 70 fixed therein. As best shown in FIG. 23, the slot 72 in the latch 68 is open at the end opposite the grip to allow the gap to widen while the bolt 70 moves in the slot 72. I have. The opening 71 is slightly larger than the head of the bolt 70, while the opening 71a
Has a somewhat smaller diameter, which generally corresponds to the diameter of the shaft of the bolt 70.

FIG. 6 shows the latch 68 in the retracted position, in which the head of the bolt 70 has the keyhole opening 7.
It can pass through the enlarged hole of 1 suitably,
On the other hand, in FIG. 7, the latch 68 is inserted, the slot portion of the keyhole-shaped opening 71 is engaged with the shank of the bolt 70,
The head of the bolt 70 sits on top of the concave surface 68a. In both figures, the caster thrust bearing 46c is positioned so that the fork assembly 46 can pivot.

Referring to FIG. 3 and FIG.
The spring-loaded connecting portion 54 of the canopy bar 52 relative to zero will now be described. The canopy bar 52 is received within a tubular member or sleeve 52a, the sleeve 52a is secured to a first lock washer member 55a, and the member 55a cooperates with a second lock washer member 55b secured to a handle 50b. Bolts 75 pass through the handle 50b and through the central openings of the washers 55a, 55b, and these washers are provided with a concave and convex groove in the radial direction so that they engage with each other and cooperate with each other. ing. These surfaces are held in frictional relation by springs 76, which surround the shaft of the bolt 75 and abut against the outer surface of the washer 55a and the inner surface of the cap washer 77, the cap washer 77 being fixed by a nut 78. It is fixed on a bolt 75. As shown, the spring 76 is in a compressed state adjusted by adjusting a nut 77,
The purpose is to provide sufficient compression on the washer 55b to hold the canopy bar 52 in the desired position, while exerting a force on the pivot of the canopy har 52 to separate the cooperating washer surfaces. It has become.

FIG. 5 illustrates the cam lever release mechanism 48, which has been described in the applicant's related application as described above. In summary, the end of the axle 36 is fixed to the wheel receiving member 80, which is provided with an axle receiving opening 81, through which the opening 81 passes at a Z-shaped angle with respect to the center line of the axle 36. are doing. The hub of the pneumatic tire wheel 42 has a cam actuating mechanism 48 which extends therethrough and engages the member 80 to releasably hold the wheel thereon. Of course, the wheel 43 has the same arrangement on the other end of the axle 36. The angled directions of the axles of the hubs of the wheels 42, 43 cause the wheels to be in an expanding outward and downward relationship with the axle 36.

The mechanism by which the main structural member 34 is interconnected to the rear axle 36 will be described with reference to FIGS. As previously described, the two members are held together by a T-shaped interconnection mechanism 40, the legs 40a of the mechanism 40 being secured to one end of the main structure member 34, and the crossbar portion 40b having a rear axle therein. The tube 36 of the assembly is received and the main structural member 34 is received.
Is perpendicular to. Interconnection mechanism 4
0 has a cam lock device which allows selective mutual sliding movement between the rear axles in the crossbar portion, i.e., in the plane formed by the main structural member and the rear axle tube 36. A first locked position in which the handle member is generally vertical, and a second unlocked position in which the handle 50 and the rear axle assembly 36 are pivoted toward the main structure member 34 to allow for folding or folding. It is possible to exercise between.

The interconnection mechanism 40 is preferably a metal,
For example, it is formed of two shell-shaped leaf pieces made of aluminum casting. The assembled mechanism 40 is essentially T-shaped, having a tubular opening 84 passing through a crossbar 85 and a tubular opening 86 passing through and intersecting a leg 87 (FIG. 14). The free end of the crossbar 85 and the leg 87 are provided with flanges. The inner diameter of the opening 86 is slightly larger than the outer diameter of the main structure frame member 34. Member 3
The end of 4 is secured in opening 86 by any suitable means, such as friction clamp engagement, welding or fasteners passing through leg 87 and into tube frame 34. Correspondingly, the inner diameter of the crossbar 85 is slightly larger than the outer diameter of the rear axle 36,
The tolerance is such that the rear axle 36 can slide within the crossbar 85 and at least by a minimum amount.

FIGS. 9 and 10 show a bottom view and a plan view, respectively. FIG. 10 shows a state in which the mechanism 40 has been rotated by 180 degrees along the center line of the leg 87 from the state in FIG. That is, FIG. 9 shows a state in which the stop pin 90b projects radially outward of the axle 36, and FIG. 10 shows a state in which the stop pin 90a projects radially outward of the axle 35. Referring to FIG. 11, it can be seen that these stop pins are diametrically opposed along a common diameter and are both located on the same side relative to the edge of the crossbar 85. At the adjacent edge of the crossbar 85, arc-shaped notches 91a and 91b are formed and fixedly engaged with the corresponding stop pins 90a and 90b. The position shown in FIG.

As shown in FIG. 10, a horseshoe-shaped rib 93 is formed in the upper shell of the mechanism 40 and the inside of the horseshoe is notched so that the axle 36 can be seen thereunder. I have. As described below, the notch and the shape of the rib 93 provide an operating slot for the cam follower shoulder and cam lever 95 to move. As specifically shown in FIG. 10, the pivot axis provided by the screw 96 of the cam lever 95 is offset with respect to the longitudinal centerline of the horseshoe rib 93, and the rib 93 is aligned with the axial centerline of the leg 87. In the center along. In the position shown in FIG. 10, the lever 95 is pivotally supported, and this position is the locked position in which the relationship between the frame member 34 and the unit of the axle 36 and the handle 50 is in the state of FIG. Immediately to the right of the crossbar 85 (Fig. 1
At 0), a retractable spring-loaded pin 98 abuts against the shoulder of the crossbar 85 and abuts. With the stop pins 90a, 90b suitably engaged and received in the notches 91a, 91b, the lock pin 9 can be retracted.
With the abutment 8 on the opposite side of the crossbar 85, the members are in a rigid relationship, i.e., the axle 36 is fixed to the mechanism 40 and, consequently, to the frame member 34.

The position of the cam lever 95 in FIG. 10 corresponds to the position of the lever in FIG. As shown in FIG. 13, the lock pin 98 is a U-shaped spring member 98a.
The spring member 98a is retained within the axle 36 and a pin 98 is secured to the other end of the spring 98a and projects through a hole 99. It is supposed to. When the locking cam lever 95 pivots counterclockwise from the position shown in FIG. 13 to the intermediate position shown in FIG. 12, a relative sliding movement occurs between the crossbar 85 and the axle 36, and the axle 36 It relatively moves in the direction indicated by the arrow 36a.
During this operation, the outer periphery of the cam-like projection 95a of the cam lever 95 abuts against the rib (shoulder) 93, and the rib 93 acts as a cam driven wheel. When such sliding relative movement occurs, the right edge of the crossbar 85 urges the spring-biased stop pin 98 downward to resist its biasing force (i.e., inward with respect to the axle 36). become.

As shown in FIG.
After the a and 90b are released from the notches 91a and 91b, a relative pivoting movement between the axles 36 in the opening 84 occurs counterclockwise as indicated by the arrow 84a and the rib 9
The lever 95 is moved from the solid line position 95 to the dotted line position 95 ′ within the notch formed by the inner edge of 3. This is because the handle 50 and the axle 36 unit move from the initial position shown in FIG. 4 (the lever 95 is in the solid line position in FIG. 14) to the frame member 34 from FIG.
17 corresponds to the movement through the intermediate stage of the frame folding sequence shown in FIG. 17, and the element position shown in FIG. 17 generally corresponds to the lever 95 'shown by the dotted line in FIG. Figures 15-17 show the main jogging frame elements, with the wheels removed, but with the seat and canopy described below.

18-20, the jogging frame comprises a flexible cloth seat arrangement 100 and a canopy 102.
Has been completed by In FIG. 4 (and FIG. 20), a first D-ring 54a is connected to the handle 50 adjacent to the spring loaded canopy support fitting 54. Similar fittings 53, 53a are located on the opposite side of the handle 50. A cooperating D-ring 61a is located below the footrest 61,
A similar cooperating ring 61b is provided on the opposite side of the footrest 61.
Is located. These D-rings act as a pair to provide support to the seat, and the flexible and adjustable straps 110 (and 112) are connected to the D-rings 54a, 61a.
(And 53a, 61b). These two straps 110, 112 provide the main support for the flexible seat, the seat pouch portion 120, the seat back portion 122, the generally triangular seat side panels 123, 124 for interconnection, It includes a leg support area 125 intermediate the seat and footrest 61.
Each of the external parts is provided with a strap sewn into the seat part.
Like 0,112, suitable means are provided for attaching to one of the metal handles 50. As the strap, for example, the strap 111 for fixing the seat pouch 120 to the handle 50, an adjustable buckle type or a fastener with hooks or eyes, for example, a trade name "Velcro Fastener" can be used.

The strip (belt) of the trade name "Velcro Fastener" can also be used under the seat portion surrounding the straps 110 and 112 shown in FIG. Although not shown, the strip is a line for fixing to the strap, and is used in the middle of the portion overlapping the abutting relationship. For complete protection of the person occupying the seat 120, a suitable adjustable seat belt 130 is provided, which is preferably first attached to the seat back part 122.
The front end of the separable canopy 140 is fixed to the middle portion of the canopy support 52 and the backs are the handle portions 50a and 50a for protection against the sun and rain.
, And is fixed by a snap fitting or the like, and the lower side thereof is fixed to a snap adjacent to the canopy pivot fittings 53 and 54.

Although the terms up, down, right, left, and counterclockwise have been used, it should be understood that these terms are for reference in reference to the drawings and are not intended to be limiting. I want to. The jogging wheelbarrow frame assembly 30 is basically made of a lightweight, rigid material such as an aluminum rod or aluminum tube. The canopy and seat are made of a suitable material such as cloth,
It can be made of plastic or other artificial materials.

In use, the wheelbarrow 30 must be robust enough to use the energy of the operator walking or jogging. In the side view of FIG. 4, the sections that make up the handlebar form lines along two different angles, making the grip portion suitable for runners and joggers. In addition, the large-diameter inclined rear wheels 42, 43 provide lateral stability during movement. In addition, as described above, the position of the seat with respect to the frame is such that the center of gravity of the baby sitting on the seat is substantially perpendicular or slightly forward with respect to the axis of the rear wheels 42 and 43, so that the wheelbarrow 30
Is, whether pressed slowly or quickly
The majority of the wheelbarrow / infant combination weight is located just in front of the rear wheel.

[0034]

In order to be foldable, the jogger will have a modular structure with the frame 30 as one element, the front wheel fork assembly 46 will be the second element and the wheels 42, 43 will be Third
And the fourth component, the last three components being easily separable and attachable from the frame 30. The fork assembly 46 provides a unique option for the front wheel 44 to select one of two modes of operation relative to the other two wheels, a fixed position or a pivoted position. In addition, T-shaped interconnection mechanism 4
0 provides an uncomplicated mechanism for folding the frame assembly as described above. While the preferred embodiment has been illustrated and described, it will be appreciated that other applications and modifications are also within the scope of the invention.

[Brief description of the drawings]

FIG. 1 is a perspective view of a frame of a wheelbarrow according to the present invention in which a part thereof is drawn.

FIG. 2 is a perspective view of the fork and block mounting assembly in FIG. 1;

FIG. 3 is a cross-sectional view of the front wheel mounting assembly taken along line 3-3 of FIG. 2;

FIG. 4 is a side view of the assembled foldable frame of FIG. 1;

FIG. 5 is an enlarged side view of a part of the rear wheel assembly of the wheelbarrow of FIG. 1 as an end surface.

FIG. 6 is a sectional view of the fork and block mounting assembly taken along line 6-6 of FIG. 2;

FIG. 7 is a cross-sectional view of the fork and block mounting assembly taken along line 7-7 of FIG. 2;

FIG. 8 is a plan view of the bearing plate along line 8-8 in FIG. 6;

FIG. 9 is a partially cutaway bottom view of the rear axle tube and interconnection mechanism.

FIG. 10 is a partially cutaway plan view of the rear axle tube and interconnection mechanism.

FIG. 11 is a cross-sectional view of the T-shaped interconnection mechanism taken along line 11-11 of FIG.

FIG. 12 is a rear view of the T-shaped interconnection mechanism taken along line 12-12 of FIG.

FIG. 13 is a rear view of the T-shaped interconnection mechanism taken along line 13-13 of FIG.

FIG. 14 is a cross-sectional view of the T-shaped interconnection mechanism taken along line 14-14 of FIG.

FIG. 15 is a side view of the foldable frame of FIG. 1;

FIG. 16 is a side view of the foldable frame of FIG. 1;

FIG. 17 is a side view of the foldable frame of FIG. 1;

FIG. 18 is a perspective view of a foldable frame of a handcart according to the present invention.

FIG. 19 is a side view of the handcart of FIG. 18.

FIG. 20 is a bottom view of the assembled jogging handcart of FIG. 18.

FIG. 21 is a schematic view showing a moving state of a caster thrust bearing plate.

FIG. 22 is a schematic view showing a moving state of a caster thrust bearing plate.

FIG. 23 is an enlarged plan view of a slider latch used in the block assembly.

FIG. 24 is a sectional view of the slider latch of FIG. 23;

[Explanation of symbols]

 Reference Signs List 30 frame assembly 34 main structure member 36 rear axle 40 interconnection mechanism 42, 43, 44 wheel 46 fork assembly 50 U-shaped handlebar 54, 64 sleeve bearing 60 block assembly 61, 62 footrest 93 rib 95 cam lever 95a cam Protrusion

Claims (8)

[Claims] 1. A frame assembly for a wheelbarrow for carrying an infant or a toddler, comprising: a frame member serving as a main structure; and a mounting block assembly fixed to one end of the frame member. A receiving fork, a rear axle formed to rotatably support a pair of wheels at its ends, and a generally inverted U-shaped handle member, both ends of which are connected to the rear axle with respect to both ends of the axle. A handle member fixed in a generally symmetrical relationship, a T-shaped interconnection mechanism, the legs of which are fixed to the other end of the frame member, and the crossbar portion of which is a cylindrical opening. An interconnecting mechanism having an opening extending through the opening to slidably receive the axle therein; and Cam lever means pivotally supported by axle, wherein the mechanism and the axle pivotally supported by the mechanism are in a first locked position in which the handle member is in a standing position in use, and the axle and the handle member are Interactingly engages the interconnecting mechanism to enable the frame assembly to pivot relative to the frame member and to be relatively displaced to a second position for folding the frame assembly as a unit. And a cam lever means. 2. The frame assembly according to claim 1, wherein said interconnection mechanism comprises two shell-shaped leaflets. 3. The fork for receiving the block assembly includes a sleeve bearing therein along a line generally perpendicular to a plane formed by the rear axle and frame members. The frame assembly of claim 1, further comprising a wheel receiving fork having a spindle pivotally and removably received within said bearing. 4. A thrust bearing is provided on said spindle adjacent said fork, said thrust bearing being formed in a disk shape, said disk shape having a reduced diameter portion extending by about 180 degrees and a reduced diameter portion having a reduced diameter portion. Depends on the selection of the notch by manually selecting the notch and one of the edges and locking the fork to a wheel fixed for movement, with a locking notch provided on the opposite side of the arc 4. A frame assembly according to claim 3, wherein means are provided for moving the fork only in one of the directions described above and for pivoting the fork at an angle of about 180 degrees depending on the choice of the edge. 5. A frame assembly for a wheelbarrow for carrying an infant or toddler, wherein the frame member serving as a main structure and a pair of wheels are rotatably supported at ends thereof. A rear axle formed as described above, a handle member having a generally inverted U-shape, and both ends of which are attached to the rear axle in a generally symmetrical relationship with respect to both ends of the axle; An interconnecting mechanism for securing one end in a generally vertical relationship with respect to the rear axle adjacent the midpoint of the axle; and a fork for rotatably supporting a front wheel of a wheelbarrow, the fork having a spindle member. And a fork receiving mount fixed to the other end of the frame member and having a spindle receiving opening therein. A locking block assembly; and cooperating means on the fork and the block assembly, wherein the mode of operation of the fork is a first mode of latching the fork with respect to the block assembly;
A frame assembly comprising cooperating means for selecting one of two modes with a second mode that allows the fork to pivot over a degree angle. 6. A disk member having an edge having a reduced diameter extending over about 180 degrees and a notch diametrically opposite a midpoint of the edge, wherein the disk member includes a spindle. Wherein the cooperating member further comprises a stop post fixed on the block assembly and located within the notch or for sliding against the edge. Item 6. The frame assembly according to Item 5. 7. The interconnecting mechanism has a slidable portion with respect to the rear axle, the rear axle having means for turning on and off engagement with the slidable portion, thereby providing two portions. 6. The frame assembly of claim 5, wherein the frame assembly is relatively locked or the two parts pivot to allow the frame to collapse. 8. The interconnection mechanism is a T-shaped crossbar portion, wherein the crossbar portion has a cylindrical opening therethrough for slidingly receiving the axle therein. A cam lever means pivotally supported on the rear axle, the cam lever means comprising a first lock wherein the mechanism and the axle pivotally supported by the mechanism are in a standing position when the handle member is in use. Position and the axle and the handle member as a unit to pivot relative to the frame member to allow relative displacement to a second position to fold the frame assembly. 6. The frame assembly according to claim 5, wherein said frame assembly is interactively engaged with said interconnection mechanism.