A trailer for bicycles

Abstract

This utility model relates to a trailer hitch for bicycles, comprising: a trailer bar with a first end for connecting to a bicycle and a second end for connecting to a trailer; the first end of the trailer bar has a transversely extending channel, within which a locking element is provided; the cable has a connecting shaft, the end of which is inserted into the channel from the first port; the second port of the channel has a button that can move back and forth along the channel, the button being constrained to the locking element and used to drive the locking element to lock or unlock the connecting shaft. This utility model facilitates the assembly and disassembly of the cable and trailer bar, thereby enabling quick connection of the trailer hitch to a bicycle.

Description

Technical Field

[0001] This utility model belongs to the field of bicycle accessories technology, specifically relating to a trailer for bicycles. Background Technology

[0002] In the existing technology, people usually use a trailer to connect the bicycle to the child trailer so that the bicycle can be ridden with the child trailer.

[0003] Existing trailer components, such as the Chinese utility model patent "Bicycle Trailer" with application number 201220148945.4 and authorization announcement number CN202541755U, include a trailer tube, a toggle sleeve, a spring, and a toggle. The spring contains a rubber rod. The front part of the trailer tube is connected to the rear end of the spring and the rear part of the rubber rod, respectively. The front end of the spring and the front part of the rubber rod are connected to the toggle sleeve, which is connected to the toggle. The toggle has a round hole for connecting to a bicycle. The rear part of the trailer tube contains a U-shaped spring piece with a circular protrusion. The top of the circular protrusion extends out of the through hole at the rear part of the trailer tube.

[0004] Another example is the pole structure disclosed in Chinese invention patent application No. 202211524374.4 and publication No. CN115783024A, entitled "A Detachable Trailer Rod and Its Installation Method".

[0005] The tow tie used to connect bicycles on existing trailer parts is generally connected to the end of the trailer handle via a pin-type structure, which is inconvenient for assembly and disassembly. Furthermore, to improve safety and prevent accidental dragging of the trailer handle by the tow handle, a safety rope is installed to connect the tow tie and the trailer handle. However, this safety rope often ends up in a tangled or even messy manner on one side of the trailer handle, which is unsightly. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a trailer for bicycles, which is based on the current state of the technology, so as to facilitate quick connection to the bicycle.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a trailer for bicycles, comprising:

[0008] A trailer bar, with a first end for attaching a bicycle and a second end for attaching to a trailer;

[0009] Its features are:

[0010] The first end of the trailer boom is provided with a transverse through channel, and a locking element is provided in the channel;

[0011] The head of the cable is provided with a connecting shaft, and the end of the connecting shaft is inserted into the channel from the first port of the channel;

[0012] The second port of the channel is provided with a button that can move back and forth along the channel. The button is constrained together with the locking member and is used to drive the locking member to lock the connecting shaft or unlock the connecting shaft.

[0013] Thus, by moving the button back and forth, the connecting shaft on the toggle head and the locking component in the channel can be locked or unlocked, facilitating the installation and release between the toggle head and the trailer rod, and making it easier to quickly connect the trailer to the bicycle.

[0014] Preferably, it further includes an elastic element that acts on the button so that the button always tends to move outward to the locked position. At this time, the locking element moves under the drive of the button to lock the connecting shaft; and when the button moves inward to the unlocked position against the elastic force of the elastic element, the locking element moves under the drive of the button to unlock the connecting shaft.

[0015] To achieve locking and unlocking of the locking member and the connecting shaft, preferably, the side circumferential surface of the connecting shaft is provided with a locking groove. The locking member is movable relative to the side circumferential surface of the connecting shaft, moving closer to or further away from it. When the button is in the locked position, the locking member moves closer to the side circumferential surface of the connecting shaft into the locking groove under the action of the button. When the button is in the unlocked position, the locking member moves away from the side circumferential surface of the connecting shaft under the action of the button, disengaging from the locking groove. When the locking member moves into the locking groove, it can constrain the axial movement of the connecting shaft, thereby preventing the connecting shaft from disengaging from the channel. After the locking member moves out of the locking groove, the operator can axially remove the connecting shaft.

[0016] Preferably, the locking groove extends circumferentially along the side circumferential surface of the connecting shaft, the locking member is a locking rod extending tangentially along the side circumferential surface of the connecting shaft, and the inner wall of the channel is provided with a limiting groove for constraining the locking rod so that the locking rod can move back and forth relative to the side circumferential surface of the connecting shaft.

[0017] Preferably, along the direction from the first port to the second port of the channel, the end of the connecting shaft is tapered with a gradually decreasing outer diameter, and the locking groove is provided corresponding to the larger end of the taper. The tapered structure facilitates guiding the locking rod into the locking groove.

[0018] In order to enable the movement of the button to drive the locking rod to move relative to the connecting shaft, the button further has a side peripheral wall extending along the length direction of the channel, and the side peripheral wall is provided with a sliding groove at the position corresponding to both ends of the locking rod, so that the corresponding locking rod ends can be inserted.

[0019] The locking rod is located on the upper side of the connecting shaft, and the groove extends upward at an angle along the direction from the first port to the second port of the channel.

[0020] The inclined, extended groove can convert the axial movement force of the button along the channel into movement of the locking lever relative to the circumferential surface of the connecting shaft.

[0021] Furthermore, there are two locking rods, arranged opposite each other on both sides of the connecting shaft, thereby stably clamping the connecting shaft.

[0022] In the above embodiments, preferably, the trailer boom includes:

[0023] The pole, with its second end for connection to the trailer;

[0024] A flexible connecting rod, the first end of which is connected to the first end of the rod body;

[0025] A rigid connector is rotatably connected to the second end of the connecting rod and has the aforementioned channel.

[0026] Preferably, the first end of the connecting rod is connected to the first end of the rod body via a sleeve.

[0027] Preferably, it also includes a safety rope and a tension spring. The first end of the safety rope is provided with a hook and protrudes from the outside of the pole through the internal space of the pole body. The second end of the safety rope is connected to the first end of the tension spring, and the second end of the tension spring is used to connect to the second end of the pole body.

[0028] The sleeve is provided with a fixing ring for the hook to be hung on. Under the action of the tension spring, the first end of the safety rope always tends to retract into the internal space of the rod.

[0029] The combination of the tension spring and the safety rope allows the safety rope to automatically retract into the pole's interior space. This retracted safety rope improves the overall structural simplicity of the trailer. To use the safety rope, simply pull out the first end.

[0030] Compared with the prior art, the advantages of this utility model are as follows: By setting a transverse through channel at the first end of the trailer rod, a locking member is provided in the channel. A connecting shaft is set at the toggle head, and the end of the connecting shaft is inserted into the channel from the first port. A button that can move back and forth along the channel is provided at the second port of the channel. The button is constrained together with the locking member and is used to drive the locking member to lock or unlock the connecting shaft. Thus, the locking or unlocking of the connecting shaft at the toggle head and the locking member in the channel can be realized by moving the button back and forth, which facilitates the installation and release between the toggle head and the trailer rod, and facilitates the quick connection of the trailer to the bicycle. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0032] Figure 2This is an exploded perspective view of a partial structure of an embodiment of the present utility model;

[0033] Figure 3 This is a partial structural diagram of an embodiment of the present utility model (button in the unlock position);

[0034] Figure 4 This is a cross-sectional view of a partial structure of an embodiment of the present invention (button in the unlocked position);

[0035] Figure 5 This is a partial structural diagram of an embodiment of the present utility model (the button is in the locked position);

[0036] Figure 6 This is a cross-sectional view of a partial structure of an embodiment of the present invention (the button is in the locked position). Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0038] like Figures 1-6 As shown, this is a preferred embodiment of a trailer for a bicycle according to the present invention. The trailer includes a trailer bar 1, a tow head 2, a locking member 3, a button 4, an elastic member 5, a safety rope 6, and a tension spring 7.

[0039] The trailer boom 1 includes a boom body 11, a connecting rod 12, a connector 13, and a sleeve 14. The second end of the boom body 11 is used to connect to a trailer (the connection structure between the boom body 11 and the trailer is based on existing technology and will not be described in detail here). The first end of the flexible connecting rod 12 (made of TPU) is connected to the first end of the boom body 11 through the sleeve 14. The second end of the connecting rod 12 is rotatably connected to the rigid connector 13, and the connector 13 serves as the end of the trailer boom 1, with a transversely extending and penetrating channel 10 inside relative to the trailer boom 1.

[0040] A locking element 3 is provided within the channel 10. A connecting shaft 21 is provided on the connecting head 2 (the connection structure between the connecting head 2 and the bicycle is the same as in the prior art and will not be described in detail here) for connecting the bicycle. The end of the connecting shaft 21 is inserted into the channel 10 from the first port 101. A button 4 that can move back and forth along the channel 10 is provided at the second port 102 of the channel 10. The button 4 is constrained to the locking element 3 and is used to drive the locking element 3 to lock or unlock the connecting shaft 21. The aforementioned elastic element 5 is a spring extending along the channel, which acts on the button so that the button 4 always has a tendency to move outward to the locked position, such as... Figure 6 As shown, at this time, the locking member 3 moves under the drive of the button 4 to lock the connecting shaft 21; and as shown, when the button 4 moves inward to the unlock position against the elastic force of the elastic member 5, the locking member 3 moves under the drive of the button 4 to unlock the connecting shaft 21.

[0041] In this embodiment, the side circumferential surface of the connecting shaft 21 is provided with a circumferentially extending annular locking groove 210. The locking member 3 is a locking rod extending tangentially along the side circumferential surface of the connecting shaft 21. The inner wall of the channel 10 is provided with a limiting groove 103 for constraining the locking rod so that the locking rod can move back and forth relative to the side circumferential surface of the connecting shaft 21 to approach or move away from the side circumferential surface of the connecting shaft 21. Along the direction from the first port 101 to the second port 102 of the channel 10, the end of the connecting shaft 21 is tapered with a gradually decreasing outer diameter, and the locking groove 210 is provided corresponding to the large end of the tapered shape. In this embodiment, there are two locking members 3, which are arranged opposite to each other on both sides of the connecting shaft 21 (assuming the connecting shaft 21 is horizontally arranged, the locking members 3 are located on the upper and lower sides of the connecting shaft 21). Figure 5 , 6 As shown, when button 4 is in the locked position, locking member 3 moves into the locking groove 210 near the side circumferential surface of connecting shaft 21 under the drive of button 4. Figure 3 , 4 As shown, when button 4 is in the unlocked position, locking member 3 moves away from the side circumferential surface of connecting shaft 21 and disengages from lock groove 210 under the drive of button 4.

[0042] In order to convert the moving force of button 4 into the movement of locking member 3, in this embodiment, button 4 has a side peripheral wall 41 extending along the length direction of channel 10. Slots 410 are provided on the side peripheral wall 41 at positions corresponding to both ends of the locking rod, for the corresponding locking rod ends to be inserted. For the slots 410 corresponding to the ends of the locking rod located on the upper side of connecting shaft 21, the slots 410 extend upwards at an angle along the direction from the first port 101 to the second port 102 of channel 10; for the slots 410 corresponding to the ends of the locking rod located on the lower side of connecting shaft 21, the slots 410 extend downwards at an angle along the direction from the first port 101 to the second port 102 of channel 10. Thus, with the movement of button 4 and the engagement of the slots 410 with the locking rod ends, the locking rod can be driven to move up and down, approaching or moving away from connecting shaft 21.

[0043] Furthermore, when the button is in the locked position and the connecting shaft 21 is disengaged from the channel 10, since the end of the connecting shaft 21 is tapered, during the process of the end of the connecting shaft 21 being inserted into the channel 10, it can push the two locking parts to move away from each other until the locking parts are inserted into the locking groove 210 of the connecting shaft 21, thus completing the installation of the connecting shaft 21. During this process, it is not necessary to press the button to the unlock position.

[0044] When it is necessary to disengage the connecting shaft 21, simply press button 4 to the unlock position for easy operation.

[0045] To improve safety during use, the first end of the safety rope 6 is equipped with a hook 61, which protrudes from the pole 11 through its internal space. The second end of the safety rope 6 is connected to the first end of the tension spring 7, which is used to connect to the second end of the pole 11. The sleeve 14 has a fixing ring 15 for attaching the hook 61. Under the action of the tension spring 7, the first end of the safety rope 6 always tends to retract into the internal space of the pole 11. The safety rope retracting inside the pole improves the overall structural simplicity of the trailer. When the safety rope is needed, simply pull out the first end of the safety rope.

[0046] In the specification and claims of this utility model, terms indicating direction, such as "upper," "lower," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A trailer for a bicycle, comprising: The trailer bar (1) has a first end with a cable head (2) for connecting a bicycle and a second end for connecting to a trailer; Its features are: The first end of the trailer rod (1) is provided with a transverse through channel (10), and a locking element (3) is provided in the channel (10); The head (2) is provided with a connecting shaft (21), and the end of the connecting shaft (21) is inserted into the channel (10) from the first port (101) of the channel (10); The second port (102) of the channel (10) is provided with a button (4) that can move back and forth along the channel (10). The button (4) is constrained together with the locking member (3) and is used to drive the locking member (3) to lock the connecting shaft (21) or unlock the connecting shaft (21).

2. The trailer component of claim 1, wherein: It also includes an elastic element (5) that acts on the button (4) so ​​that the button (4) always tends to move outward to the locked position. At this time, the locking element (3) moves under the drive of the button (4) to lock the connecting shaft (21); and when the button (4) moves inward to the unlocked position against the elastic force of the elastic element (5), the locking element (3) moves under the drive of the button (4) to unlock the connecting shaft (21).

3. The trailer component of claim 2, wherein: The side circumferential surface of the connecting shaft (21) is provided with a locking groove (210). The locking member (3) is movably disposed relative to the side circumferential surface of the connecting shaft (21) to approach or move away from the side circumferential surface of the connecting shaft (21). When the button (4) is in the locked position, the locking member (3) moves close to the side circumferential surface of the connecting shaft (21) into the locking groove (210) under the drive of the button (4). When the button (4) is in the unlocked position, the locking member (3) moves away from the side circumferential surface of the connecting shaft (21) under the drive of the button (4) and disengages from the locking groove (210).

4. The trailer component of claim 3, wherein: The locking groove (210) extends circumferentially along the side circumferential surface of the connecting shaft (21), and the locking member (3) is a locking rod extending tangentially along the side circumferential surface of the connecting shaft (21). The inner wall of the channel (10) is provided with a limiting groove (103) for constraining the locking rod so that the locking rod can move back and forth relative to the side circumferential surface of the connecting shaft (21).

5. The trailer member of claim 4, wherein: Along the direction from the first port (101) to the second port (102) of the channel (10), the end of the connecting shaft (21) is tapered with a gradually decreasing outer diameter, and the locking groove (210) is provided corresponding to the large end of the tapered shape.

6. The trailer member of claim 4, wherein: The button (4) has a side wall (41) extending along the length of the channel (10), and the side wall (41) is provided with a groove (410) at the position corresponding to both ends of the locking rod, so that the corresponding locking rod ends can be inserted. The locking rod is located on the upper side of the connecting shaft (21), and the slide (410) extends upward at an angle along the direction from the first port (101) to the second port (102) of the channel (10).

7. The trailer member of claim 4, wherein: There are two locking rods, which are arranged opposite each other on both sides of the connecting shaft (21).

8. The trailer part according to any one of claims 1-7, characterized in that: The trailer boom (1) includes: The pole (11) has a second end for connection to a trailer; A flexible connecting rod (12) has its first end connected to the first end of the rod body (11); A rigid connector (13) is rotatably connected to the second end of the connecting rod (12) and is provided with the aforementioned channel (10).

9. The trailer component of claim 8, wherein: The first end of the connecting rod (12) is connected to the first end of the rod (11) by a sleeve (14).

10. The trailer component of claim 9, wherein: It also includes a safety rope (6) and a tension spring (7). The first end of the safety rope (6) is provided with a hook (61) and protrudes outside the rod body (11) through the internal space of the rod body (11). The second end of the safety rope (6) is connected to the first end of the tension spring (7), and the second end of the tension spring (7) is used to connect to the second end of the rod body (11). The sleeve (14) is provided with a fixing ring (15) for the hook (61) to be hung. Under the action of the tension spring (7), the first end of the safety rope (6) always tends to retract into the internal space of the rod (11).

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