Easy-to-attach and detach trailer support frame fixing device

Abstract

To provide a trailer support frame fixing device that is easy to attach and detach. [Solution] The trailer support frame fixing device of the present invention comprises a first support frame 10, a second support frame 20, and a mounting unit 30. A fixing seat 11 is provided on one side of the first support frame 10. The second support frame 20 is detachably attached to the first support frame 10, and a mounting seat 21 is provided at a position corresponding to the fixing seat 11. The mounting seat 21 comprises a first locking portion 211 and a first fixed position portion 212. The mounting unit 30 is provided on the fixing seat 11 of the first support frame 10 and is movable between a locked position and an unlocked position. The mounting unit 30 comprises a second locking portion 301 and a second fixed position portion 302. When the mounting unit 30 is in the locked position P1, the second locking portion 301 and the first locking portion 211 form an engagement relationship. When the mounting unit 30 is in the unlocked position P2, the second fixed position portion 302 forms a fixed position relationship with the first fixed position portion 212 and becomes unable to return to the locked position P1, and the second locking portion 301 detaches from the first locking portion 211.

Description

Technical Field

[0001] The present invention relates to a fixing device for a support frame of a trailer, and particularly to a fixing device for a support frame of a trailer that can be easily attached and detached by a user.

Background Art

[0002] Modern people attach importance to health and there are more and more people who like sports. For example, in cycling sports, a trailer may be attached to the rear of a bicycle to carry children or pets, or to transport picnic or camping supplies.

[0003] The design of traditional trailers is a single-function design, that is, trailers for children, trailers for pets, trailers for luggage, etc.

[0004] Subsequently, removable trailers appeared. This trailer has a structure in which a removable upper frame is attached to a chassis equipped with wheels. There are multiple types of upper frames to correspond to different functions as described above, and the user can replace them with upper frames of different functions as needed without replacing the chassis.

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the aforementioned removable trailer, generally, the upper frame and the chassis are fixed with screws, and in screw fixation, the removal process is very inconvenient, so there is still room for improvement. The object of the present invention is to provide a fixing device for a support frame of a trailer that can be easily attached and detached by a user.

Means for Solving the Problems

[0006] To solve the aforementioned problems, this invention provides a trailer support frame fixing device that is easy to attach and detach. The device includes a first support frame, a second support frame, and a mounting unit. When the user separates the second support frame from the first support frame, the user does not need to hold the mounting unit with their hands throughout the entire process, and both of the user's hands are completely free to separate the second support frame and perform other operations, which is a very thoughtful design.

[0007] An easily detachable trailer support frame fixing device provided in one embodiment of the present invention includes a first support frame, a second support frame, and a mounting unit. The first support frame is provided with a fixing seat on one side thereof. The second support frame is detachably mounted on the first support frame, and the second support frame has a mounting seat at a position corresponding to the fixing seat. The mounting seat includes a first locking portion and a fixed position portion. The mounting unit is mounted on the fixing seat of the first support frame and is movable between a locked position and an unlocked position. The mounting unit has a second locking portion and a second fixed position portion. When the mounting unit is in the locked position, the second locking portion and the first locking portion form an engagement relationship, thereby locking the second support frame to the first support frame. When the mounting unit is in the unlocked position, the second fixed position portion forms a positioning relationship with the first fixed position portion and cannot return to the locked position, thereby disengaging the second locking portion from the first locking portion.

[0008] The beneficial effects of this invention are as follows: When a user wishes to separate the second support frame from the first support frame, the user only needs to operate the mounting unit to move it from the locked position to the unlocked position, and the user's hands can be completely freed from the mounting unit. At this time, the second positioning part forms a positioning relationship with the first positioning part and cannot return to the locked position, so the second locking part is detached from the first locking part. The user's hands can be used simultaneously to lift the second support frame, and the second support frame is separated from the first support frame. The entire operation process is very simple and convenient. [Brief explanation of the drawing]

[0009] [Figure 1]This is an external perspective view of the trailer support frame fixing device that is easy to attach and detach, and a close-up view of a part of the mounting unit. [Figure 2] This is an exploded perspective view of the trailer support frame fixing device that is easy to attach and detach, and a partially enlarged exploded view of the mounting unit. [Figure 3] Figure 1 shows a cross-sectional view taken along line AA, and a localized enlarged cross-sectional view of the mounting unit. [Figure 4] This is a schematic diagram of the trailer support frame fixing device of the present invention, which is easy to attach and detach, and shows that the mounting unit is moved to the release position by pressing a button. [Figure 5] This diagram shows a schematic representation of the trailer support frame fixing device of the present invention, which is easy to attach and detach, and illustrates that the user can remove the second support frame without having to hold the mounting unit by hand at any stage of the process. [Figure 6] This is a schematic diagram of the trailer support frame fixing device of the present invention, which is easy to attach and detach, and shows the second positioning part detaching from the first positioning part. [Modes for carrying out the invention]

[0010] The following refers to the attached drawings which provide detailed descriptions of embodiments of the present invention. The technical principles of the present invention are not limited to the embodiments specifically disclosed, and the scope of protection of the present invention includes substitutions, modifications, etc. Furthermore, for the convenience of understanding and viewing by those familiar with the art, the structural dimensions and sizes of the components shown in each drawing are approximate and do not limit the implementable conditions of the present invention.

[0011] Please refer to Figures 1 to 6. This invention provides a trailer support frame fixing device 100 that is easy to attach and detach. The device includes a first support frame 10, a second support frame 20, and a mounting unit 30. When the user attempts to separate the second support frame 20 from the first support frame 10, the user does not need to hold the mounting unit 30 with their hands throughout the entire process, allowing them to completely free both hands to separate the second support frame 20 or perform other operations, which is a very thoughtful design.

[0012] As shown in Figures 1 to 3, a fixed seat 11 is provided on one side of the first support frame 10. On the opposite side of the first support frame 10 from the fixed seat 11, a counter seat 12 is provided, and the counter seat 12 has a concave arc-shaped counter groove 121 facing the fixed seat 11.

[0013] In this embodiment, the first support frame 10 includes a first frame body 13 and a plurality of wheel bodies 14 connected to the first frame body 13. A fixed seat 11 is located on the rear side of the first frame body 13, and a counter seat 12 is located on the front side of the first frame body 13. Depending on the circumstances, the number of wheel bodies 14 in this embodiment can vary in various ways, such as for a two-wheeled trailer, a three-wheeled trailer, or a four-wheeled trailer. In some possible embodiments, the first support frame 10 further includes a towing bar (not shown) connected to the first frame body 13.

[0014] The second support frame 20 is detachably mounted on the first support frame 10, and the second support frame 20 is provided with a mounting seat 21 at a position corresponding to the fixed seat 11. The mounting seat 21 has a first locking portion 211 and a first fixed position portion 212.

[0015] In this embodiment, the second support frame 20 includes a second frame body 22 and additional attachments (not shown) connected to the second frame body 22. The mounting seat 21 is located on the rear side of the second frame body 22, and the frame of the second frame body 22 has a circular cross-section. In some possible embodiments, the additional attachments are stroller frames, pet cart frames, cargo cart frames, loading platforms, etc., which are mounted on the second frame body 22 according to different usage needs, thereby achieving the function of changing the use of the trailer.

[0016] As shown in Figures 1 to 4, the mounting unit 30 is provided on the fixed seat 11 of the first support frame 10, and the mounting unit 30 is movable between the locked position P1 and the unlocked position P2.

[0017] The mounting unit 30 includes a second locking part 301 and a second positioning part 302. When the mounting unit 30 is in the locked position P1, the second locking part 301 and the first locking part 211 form an engagement relationship (see Figure 3), locking the second support frame 20 to the first support frame 10. When the mounting unit 30 is in the released position P2, the second positioning part 302 forms a positioning relationship with the first positioning part 212 and cannot return to the locked position P1 (see Figure 4), the second locking part 301 detaches from the first locking part 211, and the second support frame 20 is separated from the first support frame 10.

[0018] As shown in Figures 1 to 4, in this embodiment, the mounting unit 30 includes a locking component 31, a button 32, and a spring 33. The locking component 31 is slidably mounted laterally relative to the mounting seat 11, and the second locking portion 301 is located in the direction of the mounting seat 21, corresponding to the first locking portion 211. The button 32 is connected to the end of the locking component 31 furthest from the second locking portion 301, and the second positioning portion 302 is located in the direction of the mounting seat 21, corresponding to the first positioning portion 212. The spring 33 is located between the mounting seat 11 and the button 32, and the spring 33 always provides the mounting unit 30 with a force to return to the locked position P1.

[0019] The first positioning portion 212 protrudes downward from the bottom of the mounting base 21 and has an inverted hook shape. The second positioning portion 302 protrudes upward from the upper part of the front end of the button 32 and has an inverted hook shape. The first locking portion 211 has a groove shape extending laterally, and the second locking portion 301 has a convex piece shape extending laterally.

[0020] As shown in FIGS. 3 to 6, when the user wants to separate the second support frame 20 from the first support frame 10, for example, when changing the trailer use, the user only needs to operate the mounting unit 30 to move the mounting unit 30 from the locked position P1 to the released position P2, and the user can completely release the hand from the mounting unit 30. At this time, the second positioning portion 302 and the first positioning portion 212 form a positioning relationship and cannot return to the locked position P1, so the second locking portion 301 is disengaged from the first locking portion 211. That is, the user can lift the second support frame 20 with both hands at the same time and separate the second support frame 20 from the first support frame 10. The whole process of the operation is very simple and convenient. The user does not need to hold the mounting unit 30 by hand throughout the whole process, and both hands can be completely free to perform the separation of the second support frame 20 or other operations, which is a very considerate design.

[0021] Furthermore, the user presses the button 32 with one hand to engage the reverse hook-shaped second positioning portion 302 with the reverse hook-shaped first positioning portion 212 to form a positioning relationship. At this time, the mounting unit 30 is located at the released position P2 and cannot return to the locked position P1, and the user's hand can be completely separated from the mounting unit 30 (see FIG. 4). Since the second locking portion 301 is disengaged from the first locking portion 211, then the user can lift the second support frame 20 with both hands and gradually move the second support frame 20 away from the first support frame 10 to disengage the second positioning portion 302 from the first positioning portion 212 (see FIG. 5). When the second positioning portion 302 loses the engagement with the first positioning portion 212, the mounting unit 30 returns to the locked position P1 by the spring 33 (see FIG. 6). Therefore, the whole process of the operation is very simple and convenient. The user does not need to hold the mounting unit 30 by hand throughout the whole process, and both hands can be completely free to perform the separation of the second support frame 2 or other operations, which is a very considerate design.

[0022] Furthermore, as shown in FIGS. 1 to 3 and FIG. 6, since the alignment seat 12 is provided on the front side of the first frame body 13, when the user assembles the second frame body 22, first, the front side of the second frame body 22 is inserted into the concave arc-shaped alignment groove 121, and then, the mounting seat 21 on the rear side of the second frame body 22 is attached to the fixing seat 11 on the rear side of the first frame body 13. When the user removes the second frame body 22, when the mounting seat 21 on the rear side of the second frame body 22 is separated from the fixing seat 11 on the rear side of the first frame body 13, the front side of the second frame body 22 can be slightly rotated within the concave arc-shaped alignment groove 121 with the front side of the second frame body 22 as the center, and the second frame body 22 can be easily taken out. Whether it is removal or assembly, the alignment groove 121 exhibits an additional safety support effect.

[0023] Each embodiment disclosed in the present invention is for the purpose of explanation. Those with ordinary knowledge in the relevant technical field should understand that the various features, components or processes of the present invention are not mutually exclusive, and various different forms of combinations, modifications or substitutions can be made as needed without departing from the spirit and scope of the present invention. In particular, unless otherwise clearly stated, one or more features in any embodiment can be freely combined with the features of other embodiments to create new embodiments. Therefore, all embodiments created by the combination or modification of these features are considered to be included within the scope of the present invention and should not be construed as limiting the scope of the present invention. This is hereby stated.

Explanation of Reference Numerals

[0024] 100 Support Frame Fixing Device for Trailer 10 First Support Frame 11 Fixing Seat 12 Alignment Seat 121 Alignment Groove 13 First Frame Body 14 Wheel Body 20 Second Support Frame 21 Mounting Seat 211 First Locking Portion 212 First Positioning Portion 22 Second Frame Body 30 Mounting Unit 301 Second Lock Section 302 Second localization section 31 Locking fastening parts 32 buttons 33 springs P1 Lock position P2 release position

Claims

1. A trailer support frame fixing device that is easy to attach and detach, comprising a first support frame, a second support frame, and a mounting unit, The aforementioned first support frame is equipped with a fixed seat on one side thereof. The second support frame is detachably mounted on the first support frame and has a mounting seat at a position corresponding to the fixed seat, and the mounting seat has a first locking portion and a first fixed position portion. The mounting unit is provided on a fixed base and can move between a locked position and an unlocked position. The mounting unit comprises a second locking part and a second positioning part. When the mounting unit is in the locked position, the second locking part and the first locking part engage with each other, fixing the second support frame to the first support frame. When the mounting unit is in the unlocked position, the second positioning part and the positioning part are positioned and cannot return to the locked position, and the second locking part detaches from the first locking part. This is a trailer support frame fixing device that is easy to attach and detach.

2. The mounting unit comprises a locking component, a button, and a spring, wherein the locking component is slidably mounted on the fixing seat in the lateral direction, the second locking portion is provided on the locking component on the mounting seat side at a position corresponding to the first locking portion, the button is connected to one end of the locking component opposite to the second locking portion, the second positioning portion is provided on the button on the mounting seat side at a position corresponding to the positioning portion, and the spring is provided between the fixing seat and the button, characterized in that the trailer support frame fixing device is easily attached and detached according to claim 1.

3. The aforementioned fixed position portion has an inverted hook shape that protrudes downward from the bottom of the mounting base, The trailer support frame fixing device for easy attachment and detachment according to claim 2, characterized in that the second positioning portion has an inverted hook shape that protrudes upward from the upper part of the front end of the button.

4. The trailer support frame fixing device according to claim 3, characterized in that the first locking portion is a groove extending in the lateral direction, and the second locking portion is a convex piece extending in the lateral direction.

5. The trailer support frame fixing device according to claim 1, characterized in that the first support frame is provided with an opposing seat on the opposite side of the fixed seat, and the opposing seat has an opposing groove on the fixed seat side.

6. The trailer support frame fixing device according to claim 5, characterized in that the first support frame comprises a first frame body and a plurality of wheels connected to the first frame body, the fixing seat is provided on the rear side of the first frame body and the opposing seat is provided on the front side of the first frame body.

7. The trailer support frame fixing device that is easy to attach and detach, according to claim 6, wherein the second support frame comprises a second frame body and an additional attachment connected to the second frame body, the mounting seat is provided on the rear side of the second frame body, the second frame body has a frame structure with a circular cross-section, and the opposing groove is concave arc-shaped.

8. The trailer support frame fixing device that is easy to attach and detach, according to claim 6, characterized in that the wheel body has two wheels, three wheels, or four wheels.

9. The trailer support frame fixing device that is easy to attach and detach, according to claim 6, further comprising a towing rod connected to the first frame body of the first support frame.

10. The trailer support frame fixing device according to claim 7, characterized in that the additional attachments are stroller frames, pet cart frames, cargo cart frames, and cargo beds.

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