Front wheel steering and positioning mechanism for mobile carrier

Abstract

Provide front wheel steering and positioning mechanism for the mobile carrier. [Solution] A front wheel 13 is mainly assembled to a front fork 12 of a mobile carrier, an arc-shaped position limiting hole 124 is provided in the front fork, a steering holder 2 is attached to the front wheel assembly 11, and a steering positioning plate 3 is provided inside the steering holder, which corresponds to the position of the arc-shaped position limiting hole. A pin 23 is provided on the steering holder and inserted into an insertion hole 32 provided in the steering positioning plate. If necessary, the steering positioning plate and the arc-shaped position limiting hole of the front fork are operated to different degrees of contact, and the front wheel of the mobile carrier is positioned at a plurality of different steering angles such as 360 degrees, 90 degrees, and 0 degrees. This improves safety and convenience when a user operates the mobile carrier.

Description

[Technical field]

[0001] The present invention relates to the field of mobile carriers, and more particularly to a front wheel steering and positioning mechanism for mobile carriers. [Background technology]

[0002] Mobile carriers such as general cargo carts, wheelchairs, food delivery carts, strollers, pet carts, or walkers mainly have wheels installed at the front and rear of a frame, and the front wheels can be movably rotated to change the direction of travel. The front wheels of these moving carriers usually rotate 360 ​​degrees to control steering. Summary of the Invention [Problem to be solved by the invention]

[0003] However, with the conventional mobile carrier technology mentioned above, the rotation directions of the two front wheels do not initially match when actually used, and the carrier often gets stuck when pushed, making it impossible to move; it has to be pulled backwards first and then pushed forward in order to move forward smoothly. Elderly people and people whose lower limbs have become weak due to illness or injury have had to use walkers and have the mobility carrier assist them in standing and walking. Users who lack physical strength and operating ability find it even more difficult to use, and if not operated properly, there is a risk that the walker will tip over or the user's center of gravity will become unstable, causing them to fall.

[0004] Therefore, the inventor believed that the above-mentioned shortcomings could be improved, and after extensive research, he came up with the present invention, which effectively improves the above-mentioned problems through rational design.

[0005] The present invention was developed through intensive research by the inventors in consideration of the above-mentioned problems, and its objective is to provide a front wheel steering and positioning mechanism for a mobile carrier which can position the front wheels of the mobile carrier at a number of different steering angles as needed, providing a convenient and safe operating mechanism for the mobile carrier. [Means for solving the problem]

[0006] In order to achieve the above object, the front wheel steering and positioning mechanism of the mobile carrier according to one embodiment of the present invention comprises: a carrier frame having at least one front wheel assembly provided at a front side, the front wheel assembly and a front fork shaft being assembled to each other, the front fork shaft being connected to a crown of the front fork, a fork blade being connected to a lower part of the crown, a front wheel being assembled to the fork blade of the front fork, a circular arc-shaped position limiting hole being provided on the crown of the front fork, and a position limiting included angle being formed on the circular arc-shaped position limiting hole; a steering holder assembled to the outside of the front wheel assembly, the steering holder having an arc-shaped through hole drilled along a vertical direction of the steering holder, the arc-shaped through hole corresponding to a shape and a position of the arc-shaped position limiting hole of the front fork, an assembly hole formed in a horizontal direction of the steering holder and communicating with the arc-shaped through hole, and a pin assembled into the assembly hole; a steering positioning plate installed to correspond to the arc-shaped through hole of the steering holder, a plurality of insertion holes are provided at intervals along the vertical direction of the steering positioning plate, pins of the steering holder are inserted to correspond to the insertion holes of the steering positioning plate, a convex portion is provided at the bottom end of the steering positioning plate, the steering positioning plate and its convex portion are movably inserted or not inserted into the arc-shaped position limiting hole of the front fork, and a stopper is provided at the upper end of the steering positioning plate.

[0007] In addition, in the front wheel steering and positioning mechanism of the mobile carrier of the present invention, vertical guide grooves are provided on both sides of the arc-shaped through hole of the steering holder, and guide blocks are installed on both sides of the steering positioning plate, and are connected to correspond to the guide grooves on both sides of the arc-shaped through hole of the steering holder.

[0008] In addition, in the front wheel steering and positioning mechanism of the mobile carrier according to the present invention, the steering positioning plate is characterized in that a stopper is installed at the upper end.

[0009] In addition, in the front wheel steering and positioning mechanism of the mobile carrier according to the present invention, the steering positioning plate is characterized in that a plurality of marking lines are provided at intervals above the plurality of insertion holes.

[0010] In addition, in the front wheel steering and positioning mechanism of the mobile carrier of the present invention, the multiple insertion holes of the steering positioning plate are characterized in that a first insertion hole, a second insertion hole, and a third insertion hole are arranged sequentially from top to bottom.

[0011] In addition, in the front wheel steering and positioning mechanism of the mobile carrier of the present invention, the steering positioning plate is characterized in that a 0 degree marking line, a 90 degree marking line, and a 360 degree marking line are sequentially provided at intervals from top to bottom above the first insertion hole.

[0012] In addition, in the front wheel steering and positioning mechanism of the mobile carrier of the present invention, the position limiting hole in the arc shape provided on the crown of the front fork of the carrier frame has a position limiting angle of 90 degrees.

[0013] In addition, in the front wheel steering and positioning mechanism of the mobile carrier according to the present invention, the pin is a spring pin.

[0014] In this way, when implemented, the steering positioning plate and the arc-shaped position limiting hole of the front fork can be manipulated to different degrees of contact as needed, generating positioning effects at a number of different steering angles, such as 360 degrees, 90 degrees, and 0 degrees, relative to the front wheel. This improves convenience and safety when the user operates the mobile carrier. Effect of the Invention

[0015] Since the present invention is configured as described above, it has the following advantages. 1. The front wheel steering and positioning mechanism of the mobile carrier of the present invention provides multiple different steering angles for the front wheels as needed, making it more convenient and safe for a user to operate a mobile carrier such as a walker. 2. The front wheel steering and positioning mechanism of the mobile carrier of the present invention has a steering positioning plate with multiple marking lines spaced apart. Therefore, the user can clearly understand the steering position adjustment state of the front wheels from the angle indicated by the marking line, which increases convenience for the user when adjusting the steering angle of the front wheels.

[0016] At least the following points will become apparent from the following specification and drawings. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2 is an exploded view showing a front wheel steering and positioning mechanism of a mobile carrier in accordance with an embodiment of the present invention; [Diagram 2] 1 is a front cross-sectional view of a front wheel steering and positioning mechanism of a mobile carrier according to an embodiment of the present invention; [Diagram 3] FIG. 2 is a top sectional view of a front wheel steering and positioning mechanism of a mobile carrier according to an embodiment of the present invention. [Figure 4] FIG. 1 is a view showing the use state of the front wheel steering and positioning mechanism of the mobile carrier according to one embodiment of the present invention; [Diagram 5] FIG. 2 is a second diagram showing the use state of the front wheel steering and positioning mechanism of the mobile carrier according to the embodiment of the present invention. [Figure 6] FIG. 3 is a third diagram showing the use state of the front wheel steering and positioning mechanism of the mobile carrier according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted that the present invention is not limited to the following embodiments, and various forms may be adopted as long as they fall within the technical scope of the present invention.

[0019] First, an example of a specific embodiment of a front wheel steering and positioning mechanism for a mobile carrier according to the present invention will be described with reference to Figs. 1 to 3.

[0020] The front wheel steering and positioning mechanism of the mobile carrier according to the present invention includes a carrier frame 1, a steering holder 2, and a steering positioning plate 3. The configuration of each component will be described below.

[0021] At least one front wheel assembly 11 is provided on the front side of the carrier frame 1, and at least one bearing 112 is installed in a cylindrical hole 111 of the sleeve-shaped front wheel assembly 11 and assembled so as to rotate on an axle 121 of a front fork 12, and the axle 121 of the front fork 12 is interconnected with a crown 122 of the front fork 12. A fork blade 123 is connected to the lower part of the crown 122, and a front wheel 13 is assembled to the fork blade 123 of the front fork 12. Further, a crown 122 of the front fork 12 is provided with an arc-shaped position limiting hole 124 . Here, an embodiment in which the arc-shaped position-limiting hole 124 forms a position-limiting angle of 90 degrees is described, but the position-limiting angle formed by the arc-shaped position-limiting hole 124 may be designed to be a different angle according to needs.

[0022] The steering holder 2 is assembled to the outside of the front wheel assembly 11, and an arc-shaped through hole 21 is drilled along the vertical direction of the steering holder 2, and the shape and position of the arc-shaped position limiting hole 124 of the front fork 12 correspond to that of the arc-shaped position limiting hole 124. A vertical guide groove 211 is provided on each side of the arc-shaped through hole 21 , and an assembly hole 22 is provided in the horizontal direction of the steering holder 2 , which is connected to the arc-shaped through hole 21 . A pin 23 is assembled in the assembly hole 22, and the pin 23 may be a spring pin.

[0023] The steering positioning plate 3 is an arc-shaped plate body, and is installed so as to correspond to the arc-shaped through hole 21 of the steering holder 2 . Guide blocks 31 are provided on both sides of the steering positioning plate 3 and are connected to correspond to guide grooves 211 provided on both sides of the arc-shaped through hole 21 . A plurality of insertion holes 32 are provided at intervals along the vertical direction of the steering positioning plate 3. In the main embodiment of the present invention, a first insertion hole 321, a second insertion hole 322, and a third insertion hole 323 are sequentially arranged from top to bottom along the vertical direction of the steering positioning plate 3, and the pin 23 of the steering holder 2 is inserted so as to correspond to any one of the insertion holes 32 of the steering positioning plate 3. A convex portion 33 is provided at the bottom end of the steering positioning plate 3, and a stopper 34 is formed at the top end of the steering positioning plate 3. A plurality of marking lines 35 are provided at intervals between a stopper 34 at the upper end of the steering positioning plate 3 and the first insertion hole 321. Explaining with reference to FIGS. 4 to 6, the plurality of marking lines 35 are, from top to bottom, a 0 degree marking line 351, a 90 degree marking line 352, and a 360 degree marking line 353, in that order.

[0024] Therefore, referring also to Figure 4, when a user wants to maintain the front wheel 13 of a mobile carrier such as a walker so that it rotates 360 degrees, the pin 23 is inserted so as to correspond to the third insertion hole 323 of the steering positioning plate 3. At this time, the steering positioning plate 3 does not extend outside the arc-shaped through hole 21 of the steering holder 2 and does not come into contact with the arc-shaped position limiting hole 124 of the front fork 12, so that the steering angle of the front wheel 13 is maintained at the predetermined 360 degrees. The 360-degree marking line 353 shown on the steering positioning plate 3 is appropriately positioned at the upper edge of the arc-shaped through hole 21 of the steering holder 2. A user can clearly understand the steering position adjustment state of the front wheels 13 from the 360-degree marking lines 353.

[0025] Furthermore, when the user wants to limit the steering angle of the front wheel 13, the pin 23 is released from the third insertion hole 323 of the steering positioning plate 3. Referring also to FIG. 5 , when the steering positioning plate 3 is then pushed downward, the protrusion 33 provided at the bottom end of the steering positioning plate 3 is inserted into the arc-shaped position limiting hole 124 of the front fork 12. At this time, the 90-degree marking line 352 shown on the steering positioning plate 3 is appropriately positioned at the upper edge of the arc-shaped through hole 21 of the steering holder 2, allowing the user to understand that the current front wheel 13 is adjusted to the required steering position. Next, the pin 23 is inserted into the second insertion hole 322 of the steering positioning plate 3, thereby fixing the protrusion 33 of the steering positioning plate 3 in a state where it is inserted into the arc-shaped position limiting hole 124. In this way, the steering range of the front wheels 13 can be limited to a 90 degree range by designing the projection 33 and the arc-shaped position limiting hole 124 so that their positions are limited by mutual abutment.

[0026] When the user wishes to disable steering of the front wheels 13, the insertion of the pin 23 into the second insertion hole 322 of the steering positioning plate 3 is released. Explaining this with reference to FIG. 6 as well, next, the steering positioning plate 3 is further pushed downward, and the entire arc-shaped steering positioning plate 3 is inserted into the arc-shaped position limiting hole 124 of the front fork 12. At this time, the 0 degree marking line 351 of the steering positioning plate 3 is properly positioned at the upper edge of the arc-shaped through hole 21 of the steering holder 2, so that the user can understand that the front wheels 13 are adjusted to the 0 degree steering position. Then, the user inserts the pin 23 into the first insertion hole 321 of the steering positioning plate 3, and fixes the arc-shaped steering positioning plate 3 in a state where it is completely inserted into the arc-shaped position limiting hole 124, so that the front wheels 13 cannot be steered and can only go straight.

[0027] As a result, the design of the front wheel steering positioning mechanism of the present invention limits the steering angle of the front wheel 13 of the mobile carrier such as a walker according to the user's personal needs, such as the user's physical condition and ability to operate the mobile carrier such as a walker, thereby providing safety and convenience for the user when operating the mobile carrier such as a walker, and preventing risks such as the walker overturning or the user's center of gravity becoming unstable and causing them to fall.

[0028] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means devised in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0029] 1 Carrier Frame 11 Front wheel assembly 111 Tube hole 112 Bearing 12 Front fork 121 Axis 122 Crown 123 Fork Blade 124 Arc-shaped position limiting hole 13 Front wheel 2 Steering holder 21 Circular through hole 211 Guide groove 22 Assembly holes 23 pin 3 Steering positioning plate 31 Guide block 32 Insertion hole 321 First insertion hole 322 Second insertion hole 323 3rd insertion hole 33 Convex 34 Stopper 35 Marking Line 351 0 degree marking line 352 90 degree marking line 353 360 degree marking lines

Claims

1. a carrier frame having at least one front wheel assembly provided at a front side, the front wheel assembly and a front fork shaft being assembled to each other, the front fork shaft being connected to a crown of the front fork, a fork blade being connected to a lower part of the crown, a front wheel being assembled to the fork blade of the front fork, a circular arc-shaped position limiting hole being provided on the crown of the front fork, and a position limiting included angle being formed on the circular arc-shaped position limiting hole; a steering holder assembled to the outside of the front wheel assembly, the steering holder having an arc-shaped through hole drilled along a vertical direction of the steering holder, the arc-shaped through hole corresponding to a shape and a position of the arc-shaped position limiting hole of the front fork, an assembly hole formed in a horizontal direction of the steering holder and communicating with the arc-shaped through hole, and a pin assembled into the assembly hole; a steering positioning plate installed to correspond to the arc-shaped through hole of the steering holder, a plurality of insertion holes spaced apart along the vertical direction of the steering positioning plate, pins of the steering holder being inserted to correspond to the insertion holes of the steering positioning plate, a convex portion being provided at a bottom end of the steering positioning plate, the steering positioning plate and its convex portion being movably inserted or not inserted into the arc-shaped position limiting hole of the front fork, and a stopper being provided at an upper end of the steering positioning plate.

2. The front wheel steering and positioning mechanism of a mobile carrier as described in claim 1, characterized in that vertical guide grooves are provided on both sides of the arc-shaped through hole of the steering holder, and guide blocks are installed on both sides of the steering positioning plate, and are connected to correspond to the guide grooves on both sides of the arc-shaped through hole of the steering holder.

3. 2. The front wheel steering and positioning mechanism of a mobile carrier according to claim 1, wherein the plurality of insertion holes of the steering positioning plate are provided in the order of a first insertion hole, a second insertion hole, and a third insertion hole from top to bottom.

4. The front wheel steering and positioning mechanism of a mobile carrier as described in claim 3, characterized in that the steering positioning plate has a 0 degree marking line, a 90 degree marking line, and a 360 degree marking line provided sequentially at intervals from top to bottom between the upper end stopper and the first insertion hole.

5. 2. The front wheel steering and positioning mechanism of claim 1, wherein said pin is a spring pin.

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