JP2022178489A - Handcart - Google Patents

Abstract

To provide a handcart that is user-friendly.SOLUTION: A handcart 100 comprises: a base frame 10 on which wheels 1 are mounted; a seat frame 20 supporting a seat 2; a link 30 with a handle turnably connected to the base frame 10; and a support link 40, whose one end side is turnably connected to the base frame 10 and whose other end side is turnably connected to the link 30 with a handle, which supports the seat frame 20, which is expanded in a baby carriage mode or a wagon mode in which angles of the seat frame 20 are different from each other, depending on a position of the seat frame 20 in a folded state, where a position of a handle part 32a in an expanded state remains the same between the baby carriage mode and the wagon mode.SELECTED DRAWING: Figure 1

Description

The present invention relates to a wheelbarrow.

Patent Literature 1 discloses a stroller capable of switching between a wagon mode and a stroller mode.

U.S. Patent Application Publication No. 2020/0247453

The stroller disclosed in Patent Literature 1 has a detachable seat, so it is necessary to carry the seat. When using the stroller in the stroller mode, the seat must be attached.

Moreover, in this type of stroller that can be switched between a wagon mode and a stroller mode, the handle may need to be replaced or attached when the mode is switched. In that case, it is necessary to carry the steering wheel, and the operability of the steering wheel differs between the two modes.

As described above, conventional strollers that can be switched between the wagon mode and the stroller mode have room for improvement in usability for the user.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pushcart that can be switched between a wagon mode and a stroller mode and that is user-friendly.

An embodiment of the present invention is a pushcart that can be deployed from a folded state to a stroller mode or a wagon mode, comprising a base portion to which wheels are attached, a seat frame that supports a seat, and a seat frame that is rotatably connected to the base portion. a handle-equipped link provided with a handle portion; and a support link rotatably connected at one end to the base portion and rotatably connected at the other end to the handle-equipped link to support the seat frame, Depending on the position of the seat frame in the folded state, the seat frame is unfolded into a stroller mode or a wagon mode with different angles, and the position of the handle portion in the unfolded state is the same between the stroller mode and the wagon mode. be.

According to the above aspect of the present invention, it is possible to provide a handcart that is user-friendly.

1 is a perspective view of a wheelbarrow according to an embodiment of the present invention, shown deployed in stroller mode; FIG. FIG. 2 is a side view of a wheelbarrow according to an embodiment of the present invention, shown deployed in stroller mode; FIG. 2 is a side view of the stroller mode of the pushcart according to the embodiment of the present invention, showing a state in which the seat and the hood are attached; Fig. 2 is a side view of a wheelbarrow according to an embodiment of the present invention, shown deployed in wagon mode; Fig. 2 is a side view of the wagon mode of the wheelbarrow according to the embodiment of the present invention, showing a state in which the seat and the hood are attached; Fig. 2 is a side view of a pushcart according to an embodiment of the present invention, showing a folded state before being deployed to stroller mode; Fig. 2 is a side view of a wheelbarrow according to an embodiment of the present invention, showing a folded state prior to deployment to wagon mode;

A wheelbarrow 100 according to an embodiment of the present invention will be described below with reference to the drawings.

The handcart 100 is of a folding type, and can be deployed from a folded state into a stroller mode (see FIGS. 1 to 3) or a wagon mode (see FIGS. 4 and 5). to move it. In this specification, the right side of the baby seated on the wheelbarrow 100 is the right side, the left side is the left side, the front side of the wheelbarrow 100 in the running direction is the front side, and the rear side is the back side in the running direction.

First, the handcart 100 in the unfolded state will be described with reference to FIGS. 1 to 5. FIG. 1 is a perspective view of the pushcart 100 in stroller mode, FIGS. 2 and 3 are side views of the pushcart 100 in stroller mode, and FIGS. 4 and 5 are side views of the pushcart 100 in wagon mode. . 1, 2, and 4, illustration of the seat 2 and the top 3 is omitted.

The handcart 100 includes a base frame 10 as a base portion to which the wheels 1 are attached, a seat frame 20 that supports the seat 2, and a link 30 with a handle that is rotatably connected to the base frame 10 and provided with a handle portion 32a. One end side is rotatably connected to the base frame 10, the other end side is rotatably connected to the link 30 with the handle, and the support link 40 that supports the seat frame 20 and the seat frame 20 and the support link 40 are connected. A first connecting link 50 and a second connecting link 60 are movably connected. In the handcart 100, parts are common between the stroller mode and the wagon mode, and parts need not be removed or attached when switching between the two modes. The difference between the stroller mode and the wagon mode is that the seat frame 20 has different angles in the unfolded state.

The base frame 10 supports the handle-equipped link 30 and the support link 40 , and serves as the base of the handcart 100 . The base frame 10 has a pair of horizontal frames 10a extending in the front-rear direction and parallel to each other, and a front frame 10b and a rear frame 10c connecting the pair of horizontal frames 10a, and is formed in a rectangular shape. A wheel 1 is attached to each of the four corners of the base frame 10 .

The wheel 1 has a front wheel 1a and a rear wheel 1b. Two front wheels 1a and two rear wheels 1b are provided. The front wheel 1a is attached to the base frame 10 so as to be rotatable 360 degrees in the running direction. The rear wheel 1b is attached to the base frame 10 so that the running direction is fixed in the front-rear direction. This makes it easier for a user such as a parent to operate the handcart 100 .

The handcart 100 may be of a three-wheel type in which only one front wheel 1a is provided. Further, in this embodiment, the rectangular base frame 10 is exemplified as the base portion to which the wheel 1 is attached. However, the base portion is not limited to a rectangular shape. For example, the base portion may be composed of two base portions on the front side and the rear side to which the front wheel 1a and the rear wheel 1b are attached respectively, or may be composed of four base portions to which the four wheels 1 are attached respectively. may

The handle-equipped link 30 has a substantially U-shape in plan view, and both ends thereof are connected to the base frame 10 so as to be rotatable about a rotating shaft 31a. The handle-equipped link 30 has a pair of base links 31 rotatably connected to each of the horizontal frames 10a of the base frame 10, and a U-shaped handle link 32 having a handle function. The base link 31 and the handle link 32 are rotatably connected to each other. The base link 31 is formed in an arc shape to avoid interference with the rear wheel 1b when the handcart 100 is folded (see FIGS. 6 and 7). A part of the handle link 32 has a handle portion 32a that is gripped by the user.

One end of the base link 31 is rotatably connected to the rear side of the horizontal frame 10a via a rotating shaft 31a, and the other end is rotatably connected to the end of the handle link 32 via a rotating shaft 31b. connected to

One end of the support link 40 is rotatably connected to the front side of the horizontal frame 10a via a rotating shaft 40a, and the other end is a handle of the link 30 with a handle via a rotating shaft 40b. It is rotatably connected to the link 32 .

The handcart 100 includes a lock mechanism 70 that locks the rotation of the handle-equipped link 30 and the support link 40 with respect to the base frame 10 by coupling the handle-equipped link 30 and the support link 40 in the unfolded state.

The lock mechanism 70 includes a pin portion 71 (see FIGS. 6 and 7) provided on the support link 40, an engaging portion 72 provided on the handle link 32 of the link with handle 30 and engaged with the pin portion 71, and a handle link. 32 and has a release button 73 for releasing the engagement between the pin portion 71 and the engaging portion 72 . In the unfolded state of the handcart 100 , the pin portion 71 is engaged with the engaging portion 72 to couple the link 30 with the handle and the support link 40 , and the link 30 with the handle and the support link 40 rotate with respect to the base frame 10 . is locked. When folding the handcart 100 from the unfolded state, the user operates the release button 73 to release the engagement between the pin portion 71 and the engaging portion 72, thereby enabling the handcart 100 to be folded. . Note that the engaging portion 72 may be provided on the base link 31 instead of the handle link 32 of the link with handle 30 .

The seat frame 20 has an oval ring shape and is supported by the support link 40 via the first connection link 50 and the second connection link 60 . The first connecting link 50 supports the rear side of the seat frame 20 , and the second connecting link 60 supports the front side of the seat frame 20 . As shown in FIGS. 3 and 5, the seat 2 is attached to and supported by the seat frame 20 over the entire circumference. The seat 2 is a sewn product on which an infant sits and accommodates luggage.

The seat frame 20 is attached with a bone portion 3a for supporting the hood 3 (see FIGS. 3 and 5). Three bone portions 3a are provided, and the angle of the top 3 can be adjusted by adjusting the intervals between the bone portions 3a.

The first connecting link 50 and the second connecting link 60 each consist of a pair of left and right. One end of the first connecting link 50 is rotatably connected to the seat frame 20 via a rotating shaft 50a, and the other end is rotatably connected to the support link 40 via a rotating shaft 50b. Similarly, the second connecting link 60 has one end rotatably connected to the seat frame 20 via a rotating shaft 60a and the other end rotatably connected to the support link 40 via a rotating shaft 60b. be.

The angle of the seat frame 20 differs between the stroller mode and the wagon mode when the handcart 100 is deployed. The seat frame 20 inclines as shown in FIGS. 1 to 3 in stroller mode, and is substantially horizontal as shown in FIGS. 4 and 5 in wagon mode. The reason why the angle of the seat frame 20 differs between the stroller mode and the wagon mode is that the positional relationship between the seat frame 20 and the first connecting link 50 differs between the stroller mode and the wagon mode. Specifically, in the stroller mode, the first connecting link 50 is positioned below the seat frame 20 as shown in FIG. In other words, in the stroller mode, the first connecting link 50 and the pivot shaft 50a of the seat frame 20 are located above the pivot shafts 50b of the first connecting link 50 and the support link 40. As shown in FIG. On the other hand, in the wagon mode, the first connecting link 50 is positioned above the seat frame 20 as shown in FIG. In other words, in the wagon mode, the pivot shaft 50a is positioned below the pivot shaft 50b. Thus, the relative vertical positions of the rotating shafts 50a and 50b differ between the stroller mode and the wagon mode. A method for setting the vertical position will be described later.

As shown in FIG. 5, in the wagon mode, the seat 2 is shaped like a box, and the bottom of the box is substantially horizontal. In the wagon mode, the infant can sit with their legs extended in the seat 2 or lie down and sleep. In addition, luggage can be accommodated in the seat 2 and carried.

As shown in FIG. 3, in the stroller mode, the seat 2 has a backrest portion 2a and a seat surface 2b for a seated infant. The backrest portion 2a and the seat surface 2b are formed by pulling a belt (not shown) provided on the seat 2. As shown in FIG. Thus, the seat 2 is used in common in the wagon mode and the stroller mode.

A seat belt (not shown) for fixing an infant to the seat 2 may be provided directly on the seat 2, or may be provided by connecting an external seat to which a seat belt is attached to the seat 2. .

As shown in FIGS. 1, 2 and 4, the handcart 100 further comprises an auxiliary link 80 pivotally connected to the second connecting link 60 and the base frame 10 . One end of the auxiliary link 80 is rotatably connected to the second connecting link 60 via a rotating shaft 80a, and the other end is a lateral frame of the base frame 10 via a rotating shaft 80b. It is rotatably connected to 10a.

One end (one end side) of the second connecting link 60 is rotatably connected to the seat frame 20 via a rotating shaft 60a, and the other end (the other end side) is an auxiliary link via a rotating shaft 80a. 80 is rotatably connected, and between one end and the other end is rotatably connected to the support link 40 via a rotating shaft 60b.

The base frame 10, the support link 40, the second connection link 60, and the auxiliary link 80 are rotatably connected to form a four-joint link mechanism. In a state where the rotation of the support link 40 with respect to the base frame 10 is locked by the lock mechanism 70, the rotation of the second connecting link 60 with respect to the support link 40 is locked because the link mechanism of the four joints is fixed. When the second connecting link 60 is locked against rotation, the four-joint link mechanism composed of the support link 40, the first connecting link 50, the second connecting link 60, and the seat frame 20 is also fixed. Rotation of the seat frame 20 is locked. Therefore, even if an infant or luggage is placed on the seat frame 20, the seat frame 20 does not move.

Next, the handcart 100 in the folded state will be described with reference to FIGS. 6 and 7. FIG. FIG. 6 is a side view of the handcart 100 in the folded state before being deployed in the stroller mode, and FIG. 7 is a side view of the handcart 100 in the folded state before being deployed in the wagon mode. 6 and 7, the first connecting link 50 is indicated by broken lines, and the seat 2 and the top 3 are omitted.

6 and 7 differ in the position of the seat frame 20. FIG. The handcart 100 is in a stroller mode or a wagon mode when unfolded depending on the position of the seat frame 20 in the folded state. That is, depending on the position of the seat frame 20 in the folded state, the seat frame 20 is deployed in a stroller mode or a wagon mode in which the angle of the seat frame 20 is different from each other. A detailed description is given below.

As shown in FIG. 6, the seat frame 20 is substantially horizontal in the folded state before being deployed to the stroller mode. In this state, the pivot shaft 50a of the seat frame 20 and the first connection link 50 is positioned relatively above (upper in the vertical direction) the pivot shaft 50b of the support link 40 and the first connection link 50. As shown in FIG.

On the other hand, as shown in FIG. 7, in the folded state before being deployed to the wagon mode, the rear side of the seat frame 20 is lowered and is slanted with respect to the horizontal direction. In this state, the pivot shaft 50a of the seat frame 20 and the first connecting link 50 is positioned relatively lower (lower in the vertical direction) than the pivot shaft 50b of the support link 40 and the first connecting link 50. do.

The position of the seat frame 20 in the folded state is set by gripping the rear side of the seat frame 20 and moving it, specifically by vertically moving it. In the folded state, the rotation of the second connecting link 60 with respect to the supporting link 40 is not locked, and four joints composed of the supporting link 40, the first connecting link 50, the second connecting link 60, and the seat frame 20 are formed. is not fixed, the seat frame 20 can be moved.

By lowering the rear side of the seat frame 20 from the state shown in FIG. 6, the state shown in FIG. 7 is obtained. When lowering the rear side of the seat frame 20, the rear side of the seat frame 20 is lowered until it contacts the rear frame 10c of the base frame 10.例文帳に追加That is, the rear frame 10c functions as a stopper that restricts movement of the seat frame 20. As shown in FIG.

By raising the rear side of the seat frame 20 from the state shown in FIG. 7, the state shown in FIG. 6 is obtained. When raising the rear side of the seat frame 20, the seat frame 20 is raised until it cannot be raised any further.

By holding the handle portion 32a and lifting the handle link 32 upward from the folded state shown in FIGS. The support link 40 rotates counterclockwise in the drawing about the rotation shaft 40a, and the engaging portion 72 provided on the handle link 32 and the pin portion 71 provided on the support link 40 engage with each other. , the handle link 30 and the support link 40 are connected. As a result, rotation of the link 30 with handle and the support link 40 with respect to the base frame 10 is locked. With this locking, the rotation of the second connecting link 60 with respect to the support link 40 is locked, and the rotation of the seat frame 20 is also locked. In this manner, the trolley 100 is deployed.

In the folded state shown in FIG. 6, the pivot shaft 50a of the seat frame 20 and the first connecting link 50 is relatively above (in the vertical direction) the pivot shaft 50b of the support link 40 and the first connecting link 50. ), and the seat frame 20 is supported above the support link 40 via the first connection link 50 . Therefore, when the handcart 100 is unfolded from the folded state shown in FIG. 6, the first connecting link 50 moves to rotate clockwise about the rotation shaft 50a in accordance with the unfolding operation, and the seat frame 20 moves to the first position. It is deployed in a stroller mode supported on the upper side of the support link 40 via one connection link 50 (see FIG. 2). Both the first connecting link 50 and the second connecting link 60 are positioned below the seat frame 20 in the unfolded state of the stroller mode.

In the folded state shown in FIG. 7, the pivot shaft 50a of the seat frame 20 and the first connecting link 50 is relatively lower than the pivot shaft 50b of the support link 40 and the first connecting link 50 (in the vertical direction). The seat frame 20 is supported below the support link 40 via the first connecting link 50 . Therefore, when the handcart 100 is unfolded from the folded state shown in FIG. 7, the first connecting link 50 moves so as to rotate counterclockwise about the rotation shaft 50b along with the unfolding operation, and the seat frame 20 is moved. It is deployed in a wagon mode supported below the support link 40 via the first connection link 50 (see FIG. 4). In the unfolded state of the wagon mode, the first connecting link 50 is positioned above the seat frame 20 , while the second connecting link 60 is positioned below the seat frame 20 .

As described above, in the folded state, the seat frame 20 is vertically moved (moved) so that the rotation shaft 50a of the seat frame 20 and the first connection link 50 is moved relative to the rotation shaft 50b of the support link 40 and the first connection link 50. By switching the vertical position of the seat frame 20, the angle of the seat frame 20 in the unfolded state is changed to an angle corresponding to the stroller mode or the wagon mode. To deploy to the stroller mode, the seat frame 20 should be raised and then deployed, and to deploy to the wagon mode, the seat frame 20 should be lowered and then deployed. In this way, switching between deployment to the stroller mode and deployment to the wagon mode can be performed simply by changing the position of the seat frame 20 in the folded state, so switching between the stroller mode and the wagon mode is facilitated. It can be carried out.

In the handcart 100, the handle portion 32a is shared between the stroller mode and the wagon mode. 2 and 4, the position of the handle portion 32a in the unfolded state is the same between the stroller mode and the wagon mode. That is, the height of the handle portion 32a, the inclination angle with respect to the ground, the length from the rear wheel 1b, and the like are the same between the stroller mode and the wagon mode. Therefore, since the operability of the handcart 100 does not change when switching between the stroller mode and the wagon mode, it is convenient for the user.

A display section may be provided on the handcart 100 so that the user can visually recognize whether the stroller mode or the wagon mode is deployed in the folded state. Specifically, in the folded state, the first connecting link 50 and the seat frame 20 have different inclinations in both modes. The device may be provided with a display section for distinguishing between the stroller mode and the wagon mode. Alternatively, a sensor for detecting inclination may be provided on the first connecting link 50 or the seat frame 20, and a display section for distinguishing between the stroller mode and the wagon mode based on the detection result of the sensor may be provided on the handle section 32a or the like. .

The handcart 100 may be provided with a clamping member that clamps the base frame 10 and the link 30 with a handle in the folded state. Since the clamp member restricts the distance between the base frame 10 and the link 30 with the handle, it is possible to prevent the base frame 10 and the link 30 with the handle from rattling in the folded state. Further, if the clamp member is provided with a gripping portion that can be gripped by the user, the handcart 100 in the folded state can be easily transported. The clamping member may be configured as an independent separate part, but is preferably fixed to the base frame 10 .

As shown in FIGS. 6 and 7, in the folded state, the rear end surface 72a of the engaging portion 72 is formed flat in the vertical direction. Therefore, in the folded state, by bringing the end surface 72a of the engaging portion 72 into contact with the ground, the handcart 100 stands on its own by the engaging portion 72 and the rear wheel 1b (rotated 90 degrees from the state shown in FIGS. 6 and 7). standing on its own). If the base frame 10 and the link 30 with a handle are clamped by the clamp member, the base frame 10 and the link 30 with a handle will not separate even if the handcart 100 is in a self-supporting state, and a stable self-supporting state is maintained. be done.

According to the above embodiment, the following effects are obtained.

In the handcart 100, the position of the handle portion 32a in the unfolded state is the same between the stroller mode and the wagon mode. Therefore, since the operability of the handcart 100 does not change when switching between the stroller mode and the wagon mode, it is convenient for the user.

Switching between the stroller mode and the wagon mode of the handcart 100 can be performed only by changing the position of the seat frame 20 in the folded state, thus facilitating switching between the stroller mode and the wagon mode. It can be carried out.

Since the handcart 100 has two modes, a stroller mode and a wagon mode, the stroller mode can be used when carrying an infant, and the wagon mode can be used when carrying luggage. can. In addition, after child rearing is over, the handcart 100 can also be used as a wagon exclusively for carrying luggage. In this way, it is economical because it is not necessary to purchase both a stroller and a wagon.

Configurations, functions, and effects of embodiments of the present invention will be collectively described below.

A handcart 100 that can be deployed from a folded state to a stroller mode or a wagon mode includes a base frame 10 to which wheels 1 are attached, a seat frame 20 that supports a seat 2, and a seat frame 20 that is rotatably connected to the base frame 10 and has a handle. a link 30 with a handle provided with a portion 32a; a support link 40 rotatably connected at one end to the base frame 10 and rotatably connected at the other end to the link 30 with a handle to support the seat frame 20; , depending on the position of the seat frame 20 in the folded state, the seat frame 20 is unfolded into a stroller mode or a wagon mode with different angles, and the position of the handle part 32a in the unfolded state is the stroller mode and the wagon mode are identical to each other.

In this configuration, since the operability of the handcart 100 does not change when switching between the stroller mode and the wagon mode, it is convenient for the user.

In addition, the handcart 100 further includes a first connection link 50 and a second connection link 60 that are rotatably connected to the seat frame 20 and the support link 40. In the unfolded state of the stroller mode, the first connection link 50 and Both of the second connecting links 60 are positioned below the seat frame 20, and in the unfolded state of the wagon mode, the first connecting link 50 is positioned above the seat frame 20, while the second connecting link 60 is located above the seat frame 20. located below.

In this configuration, the positional relationship between the seat frame 20 and the first connecting link 50 differs between the unfolded states of the stroller mode and the wagon mode, so that the seat frame 20 is set at different angles.

The handcart 100 further includes a second connecting link 60 and an auxiliary link 80 rotatably connected to the base frame 10 , and one end of the second connecting link 60 is rotatably connected to the seat frame 10 . , the other end side is rotatably connected to the auxiliary link 80, and the portion between the one end side and the other end side is rotatably connected to the support link 40. As shown in FIG.

In this configuration, rotation of the second connecting link 60 can be locked by the auxiliary link 80 to lock rotation of the seat frame 20 .

The handcart 100 further includes a lock mechanism 70 that locks the rotation of the handle-equipped link 30 and the support link 40 with respect to the base frame 10 by coupling the handle-equipped link 30 and the support link 40 in the unfolded state.

With this configuration, the unfolded state of the handcart 100 can be stabilized.

Although the embodiments of the present invention have been described above, the above embodiments merely show a part of application examples of the present invention, and the technical scope of the present invention is not limited to the specific configurations of the above embodiments. do not have.

100 wheelbarrow 1 wheel 2 seat 10 base frame (base part)
20 Seat frame 30 Link with handle 31 Base link 32 Handle link 32a Handle portion 40 Support link 50 First connection link 50a Rotation shaft 50b Rotation shaft 60 Second connection link 70 Lock mechanism 71 Pin portion 72 Engaging portion 73 Release button 80 auxiliary link

Claims (4)

A pushcart that can be deployed from a folded state to a stroller mode or a wagon mode,
a base to which the wheels are attached;
a seat frame that supports the seat;
a handle-equipped link rotatably connected to the base portion and provided with a handle portion;
a support link, one end of which is rotatably connected to the base portion and the other end of which is rotatably connected to the handle-equipped link, for supporting the seat frame;
Depending on the position of the seat frame in the folded state, the seat frame is deployed in a stroller mode or a wagon mode in which the angle of the seat frame is different from each other,
A pushcart, wherein the position of the handle portion in the unfolded state is the same between the stroller mode and the wagon mode. A handcart according to claim 1,
further comprising a first connecting link and a second connecting link rotatably connected to the seat frame and the support link;
In the unfolded state of the stroller mode, both the first connecting link and the second connecting link are positioned below the seat frame,
A handcart according to claim 1, wherein in a wagon mode unfolded state, the first connecting link is positioned above the seat frame, while the second connecting link is positioned below the seat frame. A wheelbarrow according to claim 2,
further comprising an auxiliary link rotatably connected to the second connecting link and the base,
The second connecting link has one end rotatably connected to the seat frame, the other end rotatably connected to the auxiliary link, and a portion between the one end and the other end rotatably to the support link. A wheelbarrow, characterized in that it is connected to a A handcart according to any one of claims 1 to 3,
The handcart further comprises a lock mechanism that locks rotation of the link with handle and the support link with respect to the base portion by coupling the link with handle and the support link in an unfolded state.

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