Carrier frame

Abstract

To develop a carrier frame with a single folding process. [Solution] The folding unit (4) includes a first tubular member (1), a second tubular member (2), a third tubular member (3), and a first rod (42), a connecting rod (43), a second rod (44), and a rotating frame (41) that are rotatable relative to the second tubular member. The first rod is rotatable relative to the rotating frame at a first and second rotation point, respectively. The connecting rod is rotatable relative to the first tubular member (1) and relative to the rotating frame at a third rotation point. The second rod is rotatable relative to the third tubular member and relative to the connecting rod at a fourth rotation point. The second, third, and fourth rotation points are located on the same axis of rotation, and the carrier frame (100) can be released and folded synchronously.

Description

Technical Field

[0006] , , , , ,

[0005]

[0001] The present invention relates to a carrier frame described in the writing part in claims 1 and 29.

Background Art

[0002] Carrier frames often employ a foldable design that is easily portable for users. Thus, the carrier frame can be fully extended in the used state or folded into a small size in the unused state for storage or carrying.

[0003] Conventional carrier frames can be operated so that the front legs, rear legs, and handle of the carrier frame are folded. Therefore, there are foldable mechanisms between the front legs and the rear legs, between the front legs and the handle, or between the rear legs and the handle, respectively. Thus, when a user wants to fold the carrier frame, the user has to first fold the front legs and the rear legs, and then bend down to fold the handle to complete the folding of the carrier frame. As a result, the aforementioned foldable design not only causes a complicated folding process because the user needs to use hands to perform a number of folding operations, but also causes a lot of inconvenience to the user because the user has to bend down to fold the carrier frame.

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to solve the above problems, it is necessary to develop a carrier frame having a single folding process.

[0005] One object of the present invention is to provide a carrier frame that can be released and folded synchronously, and has the advantages that the carrier frame is easy to fold, has a simple structure, and is convenient to operate.

[0006] Another object of the present invention is to provide a carrier frame that can improve the operational stability of the carrier frame, and which has the advantages of being easy to fold, having a simple structure, and being convenient to operate. [Means for solving the problem]

[0007] This is achieved by the carrier frame described in claim 1 and the carrier frame described in claim 29. Dependent claims relate to corresponding further developments and improvements. As will be more evident from the detailed description below, the claimed carrier frame provided by the present invention comprises a first tubular member, a second tubular member, and a third tubular member. The second tubular member is pivotable relative to the first tubular member. The third tubular member is pivotable relative to the second tubular member in cooperation with the first and second tubular members to form a pivot. The carrier frame further comprises a folding unit. The folding unit comprises a pivot frame, a first rod, a coupling rod, and a second rod. The pivot frame is hinged to the pivot and the second tubular member, respectively. One end of the first rod is pivotable relative to the pivot frame at a first pivot point. The other end of the first rod is pivotable relative to the pivot frame at a second pivot point. One end of the connecting rod rotates relative to the first tubular member. Another end of the connecting rod rotates relative to the rotating frame at a third rotation point. One end of the second rod rotates relative to the third tubular member. Another end of the second rod rotates relative to the connecting rod at a fourth rotation point. The second, third, and fourth rotation points are located on the same axis of rotation. The folding of the first tubular member relative to the third tubular member drives the second rod via the connecting rod so that it folds relative to the rotating frame, so as to fold the third tubular member relative to the second tubular member.

[0008] Compared to the prior art, the carrier frame of the present invention has a folding unit disposed thereon. The folding unit includes a rotating frame, a first rod, a connecting rod, and a second rod. The rotating frame rotates relative to a rotating section and a second tubular member. One end of the first rod rotates relative to the rotating frame at a first rotation point, and the other end of the first rod rotates relative to the rotating frame at a second rotation point, thereby allowing the rotating frame and the first rod to cooperate in forming a quadrilateral structure. One end of the connecting rod rotates relative to the first tubular member, and the other end of the connecting rod rotates relative to the rotating frame at a third rotation point. One end of the second rod rotates relative to the third tubular member, and the other end of the second rod rotates relative to the connecting rod at a fourth rotation point. The second, third, and fourth pivot points are positioned on the same pivot axis so as to cooperate in forming a coupling structure with the pivot frame, the first rod, and the second rod. The coupling rod is designed to drive the second rod so that it folds relative to the pivot frame by the folding of the first tubular member relative to the third tubular member, thereby enabling the third tubular member to fold simultaneously with the second tubular member, thereby achieving the objective that the folding of the first tubular member relative to the third tubular member drives the third tubular member to fold relative to the second tubular member. Thus, the carrier frame of the present invention can be released and folded synchronously, and has the advantages of being easy to fold, having a simple structure, and being convenient to operate.

[0009] The rotating frame preferably includes a third rod connected to a fourth rod, a fourth rod connected to a fifth rod, and a fifth rod. The first rod is rotated relative to the third rod at a first rotation point. The first rod is rotated relative to the fifth rod at a second rotation point. The third rod is rotated relative to the rotating part.

[0010] Preferably, the second tubular member is connected to a joint where the fourth rod is connected to the fifth rod.

[0011] Preferably, the rotating frame and the first rod cooperate to form a trapezoidal structure.

[0012] The connecting rod preferably has a recess for providing a position where the rotating frame is hinged to the rotating part.

[0013] Preferably, the carrier frame further includes guide rails. The guide rails are connected to a coupling rod, and preferably, the guide rails form an upward handle structure when the first tubular member, the second tubular member, and the third tubular member are folded relative to each other.

[0014] The carrier frame further includes a first locking device for locking the rotation of the first tubular member relative to the third tubular member, and the first locking device is preferably located on the rotating portion.

[0015] In particular, the carrier frame further includes a fourth tubular member that rotates relative to a first tubular member, and the folding of the fourth tubular member relative to the first tubular member releases a first locking device.

[0016] In particular, the first locking device includes a first tensioning member, a pressing member, a first mounting base, a second mounting base, and a locking member. The first tubular member is connected to the first mounting base. The third tubular member is connected to the second mounting base. The first mounting base is rotatable relative to the second mounting base. The locking member is movably positioned between the first mounting base and the second mounting base. The pressing member is positioned between the first mounting base and the locking member. The pressing member and the locking member are in contact with each other. The end of the first tensioning member is connected to the pressing member, and when the first tensioning member pulls the pressing member, the pressing member pushes the locking member, releasing the first mounting base from the second mounting base.

[0017] In particular, a projection extends from the first mounting base toward the pressing member, and an inclined surface is formed on the pressing member corresponding to the projection. The end of the first tensioning member is wrapped around the pressing member. The first tensioning member pulls the pressing member so that it rotates to bring the projection into contact with the inclined surface, and the projection contacts the inclined surface so that the pressing member pushes and moves the locking member.

[0018] In particular, the inclined surface is a helical surface structure formed on the pressing member.

[0019] In particular, a first winding slot is formed on the pressing member corresponding to a first tension member, and the first tension member is wound on the first winding slot.

[0020] In particular, the first locking device further includes a first elastic member positioned between a second mounting base and a locking member.

[0021] In particular, the locking member has an engaging tooth structure, with a first tooth structure formed on the first mounting base and a second tooth structure formed on the second mounting base. The first elastic member pushes the engaging tooth structure, thereby engaging the engaging tooth structure with the first tooth structure and the second tooth structure to lock the first mounting base and the second mounting base.

[0022] In particular, the pressing member pushes against the engaging tooth structure, overcoming the elastic force of the first elastic member, disengaging from the first tooth structure, and freeing the first mounting base from the second mounting base.

[0023] In particular, the locking member is movable along the pivot shaft between the first mounting base and the second mounting base.

[0024] In particular, the pressing member is movable along the pivot shaft between the first mounting base and the second mounting base.

[0025] In particular, the first locking device further includes a drive member disposed through the first tubular member and the fourth tubular member and engaged with the fourth tubular member. Another end of the first tension member is wound around the drive member, and the folding of the fourth tubular member relative to the first tubular member allows the drive member to rotate and pull the first tension member.

[0026] In particular, a second winding slot is formed on the drive member, and the first tension member is wound on the second winding slot.

[0027] In particular, the carrier frame further includes a locking structure for locking the first tubular member and the fourth tubular member in the folded state.

[0028] In particular, the locking structure includes a torsion spring. The ends of the torsion spring are attached to the drive member. The other end of the torsion spring has an engaging hook. A fixed pillar extends outward from the first tubular member. When the fourth tubular member is folded onto the first tubular member, the drive member drives the engaging hook to engage the engaging hook with the fixed pillar.

[0029] In particular, an insertion slot corresponding to the torsion spring is formed on the drive member.

[0030] In particular, the carrier frame further includes a second locking device disposed between the first tubular member and the fourth tubular member for locking the rotation of the fourth tubular member relative to the first tubular member.

[0031] In particular, the second locking device includes a second tension member, an engaging member, a mating member, a first fixed member, a second fixed member, and an operating member. The first tubular member is connected to the first fixed member. The fourth tubular member is connected to the second fixed member. The first fixed member is connected to the second fixed member, and the mating member is connected to the first fixed member. The engaging member is slidably positioned on the second fixed member. The engaging member engages with the mating member to lock the first and fourth tubular members in the extended state. One end of the second tension member is connected to the operating member. The other end of the second tension member is connected to the engaging member. The operating member is operated to disengage the engaging member from the mating member via the second tension member.

[0032] In particular, the first and second fixing members are fitted and rotated relative to each other.

[0033] In particular, the second locking device further includes a second elastic member. The second elastic member provides an elastic force for engaging the engaging member with the interlocking member.

[0034] In particular, the pillar extends from the engaging member toward the interlocking member. The engaging hole structure is formed in the interlocking member corresponding to the pillar.

[0035] In particular, when the fourth tubular member is folded on the first tubular member, the first and fourth tubular members cooperate to form a support leg structure.

[0036] To achieve the aforementioned objectives, the carrier frame provided by the present invention includes a first tubular member, a second tubular member, a third tubular member, and a fourth tubular member. The second tubular member is rotatable relative to the first tubular member. The third tubular member is rotatable relative to the second tubular member. The fourth tubular member is rotatable relative to the first tubular member. The fourth tubular member is foldable relative to the first tubular member. The carrier frame further includes a locking mechanism for locking the first tubular member and the fourth tubular member in a folded state.

[0037] The locking mechanism preferably includes a torsion spring. One end of the torsion spring is attached to a drive member located on the fourth tubular member. Another end of the torsion spring has an engagement hook, and a fixing pillar extends outward from the first tubular member. When the fourth tubular member is folded over the first tubular member, the drive member is driven to engage the engagement hook with the fixing pillar.

[0038] In particular, insertion slots are formed on the drive member for arranging torsion springs.

[0039] In particular, after the fourth tubular member is folded on the first tubular member, the first and fourth tubular members cooperate to form a support leg structure.

[0040] Compared to the prior art, the carrier frame of the present invention includes a locking structure positioned between the first tubular member and the fourth tubular member to lock the first and fourth tubular members in the folded state. Therefore, the present invention can prevent the carrier frame from unexpectedly expanding during the transport process, improves the folding stability of the carrier frame, and has the advantages of having a simple structure and being convenient to use.

[0041] In the following, the present invention is further illustrated by reference to the accompanying drawings. [Brief explanation of the drawing]

[0042] [Figure 1] This is a side view of a carrier frame when a fourth tubular member is folded on the first tubular member, and the first tubular member, the second tubular member, and the third tubular member are undergoing a folding process according to one embodiment of the present invention. [Figure 2] This is a side view of the carrier frame of the present invention when the fourth tubular member is folded on the first tubular member, and the first tubular member, the second tubular member, and the third tubular member are folded relative to each other. [Figure 3]This is a side view of the carrier frame of the present invention when the first tubular member, the second tubular member, the third tubular member, and the fourth tubular member are in a folded state. [Figure 4] This is a diagram of the carrier frame of the present invention in its expanded state. [Figure 5] This is a diagram of the carrier frame of the present invention in an expanded state at a different field of view. [Figure 6] This is a diagram of the carrier frame of the present invention during the folding process. [Figure 7] This is a diagram of the carrier frame of the present invention after it has been completely folded. [Figure 8] This is a side view of the carrier frame of the present invention in its extended state. [Figure 9] This is a partial cross-sectional view of the carrier frame of the present invention in its expanded state. [Figure 10] This is a magnified view of the carrier frame in region "A" of Figure 9. [Figure 11] This is a partially exploded view of the carrier frame of the present invention in its extended state. [Figure 12] This is a magnified view of the carrier frame in region "B" of Figure 10. [Figure 13] A partially exploded view of the carrier frame of the present invention in an expanded state at a different viewing angle. [Figure 14] This is a partially exploded view of the carrier frame of the present invention in its extended state. [Figure 15] This is a magnified view of the carrier frame in region "C" of Figure 14. [Figure 16] This is a diagram of the pressing member of the carrier frame of the present invention. [Figure 17] This is a diagram of the carrier frame of the present invention when the fourth tubular member is folded relative to the first tubular member. [Figure 18] This is another exploded view of the carrier frame of the present invention in its extended state. [Figure 19] This is a diagram of the drive member of the carrier frame of the present invention. [Modes for carrying out the invention]

[0043] Herein, embodiments of the present invention will be described with reference to the accompanying drawings.

[0044] Refer to Figures 1 to 7. The carrier frame 100 provided by the present invention includes a first tubular member 1, a second tubular member 2, and a third tubular member 3. The first tubular member 1 is rotated relative to the second tubular member 2 so as to be foldable relative to the second tubular member 2. The second tubular member 2 is rotated relative to the third tubular member 3 so as to be foldable relative to the second tubular member 2. The first tubular member 1, the second tubular member 2, and the third tubular member 3 are rotated at the same point to cooperate in forming a rotating section 10. The carrier frame 100 further includes a folding unit 4. The folding unit 4 includes a rotating frame 41, a first rod 42, a connecting rod 43, and a second rod 44. The rotating frame 41 is hinged to the rotating section 10 and the second tubular member 2. The rotation points between the rotating frame 41 and the rotating part 10, and the rotation points between the rotating frame 41 and the second tubular member 2, are spaced apart from each other. One end of the first rod 42 rotates relative to the rotating frame 41 at the first rotation point a, and the other end of the first rod 42 rotates relative to the rotating frame 41 at the second rotation point b. The first rotation point a and the second rotation point b are spaced apart from each other so that the first rotating frame 41 and the first rod 42 cooperate to form a quadrilateral structure. One end of the connecting rod 43 rotates relative to the first tubular member 1, and the other end of the connecting rod 43 rotates relative to the rotating frame 41 at the third rotation point. The connecting rod 43 is a sheet-like structure and has a recess 431 for providing a position where the rotating frame 41 is hinged to the rotating part 10, preventing interference between the connecting rod 43 and the rotating frame 41 so as to make each component of the carrier frame 100 smaller. One end of the second rod 44 rotates relative to the third tubular member 3, and the other end of the second rod 44 rotates relative to the connecting rod 43 at the fourth rotation point. The second rotation point b, the third rotation point and the fourth rotation point are located on the same axis of rotation so that the rotating frame 41, the first rod 42 and the second rod 44 cooperate to form a connecting structure.Through the folding of the first tubular member 1 relative to the third tubular member 3, the connecting rod 43 can fold the second rod 44 relative to the rotating frame 41 so as to fold the third tubular member 3 relative to the second tubular member 2. In this way, the objective is achieved to synchronously drive the third tubular member 3 so as to fold the first tubular member 1 relative to the third tubular member 3 relative to the second tubular member 2. When the carrier frame 100 is folded, the rotation of the first tubular member 1 relative to the third tubular member 3 can simultaneously drive the second tubular member 2 and the third tubular member 3 so as to move closer to each other to complete the folding operation of the carrier frame 100. Therefore, the user only needs to rotate the first tubular member 1, and then the third tubular member 3 can be folded synchronously relative to the second tubular member 2, so there is no need to further fold the second tubular member 2 and the third tubular member 3 to improve the usability of the carrier frame 100. The carrier frame 100 of the present invention is suitable for foldable devices such as scaffolding, folding ladders, folding wheelchairs and strollers, but is not limited thereto. A more detailed description of one embodiment in which the carrier frame 100 is applied to a stroller as shown in Figures 1 to 19 is provided below. In this embodiment, the first tubular member 1 of the carrier frame 100 is the handle of the stroller, the second tubular member 2 is the front leg of the stroller, and the third tubular member 3 is the rear leg of the stroller. Thus, the user can rotate the handle to move the front and rear legs toward or toward each other in order to fold or extend the carrier frame 100. In other words, to complete the folding or unfolding of the carrier frame 100, the user only needs to operate the handle, thus eliminating the problem of conventional technology where the user has to bend down to fold the front and rear legs of the stroller. Therefore, the ease of use of the stroller is improved.

[0045] For more details, please refer to Figures 4 to 7. The rotating frame 41 includes a third rod 411, a fourth rod 412, and a fifth rod 413. The first rod 42 rotates relative to the third rod 411 at a first rotation point a, the first rod 42 rotates relative to the fifth rod 413 at a second rotation point b, the third rod 411 rotates relative to the rotating part 10, and the second tubular member 2 rotates relative to the joint where the fourth rod 412 is connected to the fifth rod 413. In this way, the first rod 42, the second rod 44, the third rod 411, the fourth rod 412, and the fifth rod 413 can cooperate to form a coupling mechanism. Thus, the folding of the first tubular member 1 relative to the third tubular member 3 can drive the third tubular member 3 to fold synchronously relative to the second tubular member 2. Preferably, the rotating frame 41 can cooperate with the first rod 42 to form a trapezoidal structure. In this embodiment, the rotating frame 41 and the first rod 42 cooperate to form a right-side trapezoidal structure.

[0046] Please refer to Figures 1 to 4. The carrier frame 100 provided by the present invention further includes a guard rail 6. The guard rail 6 is connected to a coupling rod 43. When the first tubular member 1, the second tubular member 2, and the third tubular member 3 are folded together relative to each other, the guard rail 6 forms an upward handle structure (shown in Figure 3) for convenient transport of the carrier frame 100, thereby improving the usability of the carrier frame 100.

[0047] Refer to Figures 8 to 16. The carrier frame 100 further includes a first locking device 7 and a fourth tubular member 5. The first locking device 7 is used to lock the rotation of the first tubular member 1 relative to the third tubular member 3. The first locking device 7 is located on the rotating part 10. The fourth tubular member 4 is rotated relative to the first tubular member 1. The first locking device 7 can be released by folding the fourth tubular member 5 relative to the first tubular member 1. That is, it is not necessary to additionally place an operating member 96 on the first locking device 7, and the user only needs to rotate the first tubular member 1 and the fourth tubular member 5 to release the first locking device 7. For example, the first locking device 7 includes a first tensioning member 71, a pressing member 72, a first mounting base 73, a second mounting base 74, a locking member 75, and a first elastic member 76. The first tubular member 1 is connected to the first mounting base 73, and the third tubular member 3 is connected to the second mounting base 74, and the first mounting base 73 is rotatable relative to the second mounting base 74. In this way, the rotation of the first mounting base 73 relative to the second mounting base 74 can drive the first tubular member 1 to rotate relative to the third tubular member 3, and the rotation of the first tubular member 1 relative to the third tubular member 3 can be locked by locking the first mounting base 73 and the second mounting base 74. A locking member 75 is movably positioned between the first mounting base 73 and the second mounting base 74. A pressing member 72 is positioned between the first mounting base 73 and the locking member 75. The pressing member 72 and the locking member 75 are in contact with each other. The first elastic member 76 is positioned between the second mounting base 74 and the locking member 75 and tends to bias the locking member 75 relative to the first mounting base 73, thereby causing the pressing member 72 and the locking member 75 to abut against each other. The end of the first tension member 71 is connected to the pressing member 72. When the fourth tubular member 5 is folded relative to the first tubular member 1, the first tension member 71 pulls the pressing member 72 so as to move the locking member 75 along the pivot shaft between the first pivot base 73 and the second pivot base 74.The pressing member 72 moves along the pivot shaft between the first mounting base 73 and the second mounting base 74 in order to release the first mounting base 73 from the second mounting base 74.

[0048] Refer to Figures 8 and 10-16. A projection 731 extends from the first mounting base 73 toward the pressing member 72, and an inclined surface 721 is formed on the pressing member 72 corresponding to the projection 731. The end of the first tension member 71 is wrapped around the pressing member 72. The first tension member 71 pulls the pressing member 72 so that it rotates to bring the projection 731 into contact with the inclined surface 721. In this way, the contact of the projection 731 with the inclined surface 721 causes the pressing member 72 to push and move the locking member 75. That is, the rotation of the pressing member 72 causes the contact of the projection 731 with the inclined surface 721 to move the pressing member 72 along the pivot shaft between the first mounting base 73 and the second mounting base 74. Therefore, the pressing member 72 can press the locking member 75 so as to move along the pivot shaft between the first mounting base 73 and the second mounting base 74 in order to lock or unlock the first mounting base 73 and the second mounting base 74. The inclined surface 721 is a helical surface structure formed on the pressing member 72. In this embodiment, three protrusions 731 are formed on the first mounting base 73 and are arranged symmetrically with respect to the pivot shaft between the first mounting base 73 and the second mounting base 74. The three protrusions 731 are arranged equally spaced on the first mounting base 73. Accordingly, three inclined surfaces 721 are formed on the pressing member 72 and are arranged symmetrically with respect to the pivot shaft between the first mounting base 73 and the second mounting base 74. The three inclined surfaces 721 are arranged equally spaced on the pressing member 72. Furthermore, a first winding slot 722 is formed on the pressing member 72 corresponding to the first tension member 71, and the first tension member 71 is wound on the first winding slot 722 to prevent interference between the components of the carrier frame 100, thereby making the components of the carrier frame 100 smaller. The first tension member 71 is preferably a steel wire rope, but is not limited thereto.

[0049] Refer to Figures 13 to 15. The locking member 75 has an engaging tooth structure 751, with a first tooth structure 732 formed on the first mounting base 73 corresponding to the engaging tooth structure 751, and a second tooth structure 741 formed on the second mounting base 74 corresponding to the engaging tooth structure 751. The first elastic member 76 can push the engaging tooth structure 751 so as to engage with the first tooth structure 732 and the second tooth structure 741 simultaneously in order to lock the first mounting base 73 and the second mounting base 74. On the other hand, the pressing member 72 can push the engaging tooth structure 751 so as to overcome the elastic force of the first elastic member 76, and thus the engaging tooth structure 751 can be disengaged from the first tooth structure 732 in order to release the first mounting base 73. That is, when the engaging tooth structure 751 engages with the first tooth structure 732 and the second tooth structure 741 simultaneously, the engaging tooth structure 751 can lock the position of the first tooth structure 732 relative to the second tooth structure 741, thereby fixing the rotation angle of the first tubular member 1 relative to the third tubular member 3, in order to prevent the first mounting base 73 from rotating relative to the second mounting base 74. When the engaging tooth structure 751 is disengaged from the first tooth structure 732 and then pushed by the pressing member 72 to overcome the elastic force so that it can fully engage with the second tooth structure 741, the engaging tooth structure 751 no longer restricts the position of the first tooth structure 732 relative to the second tooth structure 741. As a result, the first mounting base 73 is rotatable relative to the second mounting base 74, allowing the first tubular member 1 to rotate freely relative to the third tubular member 3. In short, the carrier frame 100 has a simple locking design and is easy to operate. The engaging tooth structure 751 is preferably formed with a circumferential distribution. Accordingly, the first tooth structure 732 and the second tooth structure 741 are formed with a circumferential distribution to make the lock of the engaging tooth structure 751 more stable.

[0050] Refer to Figures 8-10 and 18-19. The first locking device 7 further includes a drive member 77. A first fixing member 94 is connected to a first tubular member 1, and a second fixing member 95 is connected to a fourth tubular member 5. The drive member 77 is positioned through the first fixing member 94 and the second fixing member 95. The drive member 77 is engaged with the fourth tubular member 5. Another end of the first tension member 71 is wound over the drive member 77. Through the folding of the fourth tubular member 5 relative to the first tubular member 1, the drive member 77 can rotate accordingly to pull the first tension member 71, and thus the first tension member 71 can pull the pressing member 72 to rotate. In particular, a second winding slot 771 is formed on the drive member 77 corresponding to the first tension member 71, and the first tension member 71 is wound on the second winding slot 771 to prevent interference between the components of the carrier frame 100, thereby making the components of the carrier frame 100 smaller.

[0051] Refer to Figure 18. The carrier frame 100 provided by the present invention further includes a locking structure 8 for locking the first tubular member 1 and the fourth tubular member 5 in a folded state. For example, the locking structure 8 includes a torsion spring 81. A drive member 77 is fixedly engaged with the fourth tubular member 5. Rotation of the fourth tubular member 5 relative to the first tubular member 1 can drive the drive member 77 to rotate. One end of the torsion spring 81 is connected to the drive member 77 on the fourth tubular member 5, and the other end of the torsion spring 81 has an engagement hook 811. A fixing pillar 11 extends outward from the first tubular member 1 in correspondence with the engagement hook 811 and is formed on the first fixing member 94. When the fourth tubular member 5 is folded relative to the first tubular member 1, the drive member 77 drives the engagement hook 811 to engage with the fixed pillar 11, locking the first tubular member 1 and the fourth tubular member 5. After the fourth tubular member 5 is folded relative to the first tubular member 1, the first tubular member 1 and the fourth tubular member 5 cooperate to form an anti-tip support leg structure, effectively preventing the carrier frame 100 from tipping over after it is folded. In particular, an insertion slot 772 corresponding to a torsion spring 81 is formed on the drive member 77. The torsion spring 81 can be attached to the drive member 77 through the insertion slot 772 to prevent interference between the first tension member 71 and the torsion spring 81.

[0052] Refer to Figures 8 and 18. The carrier frame 100 provided by the present invention further includes a second locking device 9. The second locking device 9 is used to lock the rotation of the fourth tubular member 5 relative to the first tubular member 1. The second locking device 9 is positioned between the first tubular member 1 and the fourth tubular member 5. For example, the second locking device 9 includes a second tensioning member 91, an engaging member 92, a meshing member 93, a first fixing member 94, a second fixing member 95, an operating member 96, and a second elastic member 97. The first tubular member 1 is connected to the first fixing member 94. The fourth tubular member 5 is connected to the second fixing member 95. The first fixing member 94 is fitted into the second fixing member 95 and rotates relative to it. The meshing member 93 is fitted into the first fixing member 94 and connected to the second fixing member 95. A second elastic member 97 is positioned on the fourth tubular member 5. One end of the second elastic member 97 is connected to the fourth tubular member 5, and the other end of the second elastic member 97 is positioned and connected to an engaging member 92. The engaging member 92 is slidably positioned on the second fixed member 95. The second elastic member 97 provides elastic force to engage the engaging member 92 with the interlocking member 93 in order to lock the first tubular member 1 and the fourth tubular member 5 in an extended state. One end of the second tension member 91 is connected to an operating member 96, and the other end of the second tension member 91 is connected to the engaging member 92. The second tension member 91 is movable along the axial direction of the fourth tubular member 5. The operating member 96 can be operated to pull the second tension member 91. Therefore, the second tension member 91 can overcome the elastic force of the second elastic member 97 and then pull the engaging member 92 so that it is disengaged from the engaging member 93. As a result, the second fixing member 95 is freely rotatable relative to the first fixing member 94 so that the fourth tubular member 5 can rotate freely relative to the first tubular member 1. For example, a pillar extends from the engaging member 92 toward the engaging member 93, and an engagement hole structure is formed in the engaging member 93 corresponding to the pillar. The pillar and the engagement hole structure can be engaged with each other, and the cross-section of the engagement hole structure is rectangular.

[0053] In summary, please refer to Figures 1 to 19. A detailed description of the operation of the carrier frame 100 of the present invention is provided below.

[0054] If the user wants to fold the stroller in the extended state as shown in Figure 4, the user can push the actuation member 96 to drive the engagement member 92 via the second tension member 91 to overcome the elastic force of the second elastic member 97. Thus, the engagement member 92 can be disengaged from the interlocking member 93 to allow the second fixing member 95 to rotate freely relative to the first fixing member 94, so that the fourth tubular member 5 can rotate freely relative to the first tubular member 1. In this way, the fourth tubular member 5 can be folded relative to the first tubular member 1 to form a toe-support leg structure as shown in Figure 7. During the folding of the fourth tubular member 5 relative to the first tubular member 1, the drive member 77 is therefore rotated to drive the engagement hook 811 to engage with the fixing pillar 11, thereby locking the first tubular member 1 and the fourth tubular member 5 in the folded state. Simultaneously, the rotation of the drive member 77 can drive the first tension member 71 to pull the pressing member 72, thereby pushing the locking member 75 so that the pressing member 72 moves along the pivot shaft between the first mounting base 73 and the second mounting base 74. When the engaging tooth structure 751 is pushed by the pressing member 72 to overcome the elastic force so that it is disengaged from the first tooth structure 732 and then fully engaged with the second tooth structure 741, the engaging tooth structure 751 achieves free rotation of the first tubular member 1 relative to the third tubular member 3 without restricting the position of the first tooth structure 732 relative to the second tooth structure 741 so that the first mounting base 73 is rotatable relative to the second mounting base 74. The folding of the first tubular member 1 relative to the third tubular member 3 can be performed by driving the second rod 44 via the connecting rod 43 to fold the third tubular member 3 relative to the second tubular member 2 relative to the second tubular member 2. In this way, the objective is achieved that the folding of the first tubular member 1 relative to the third tubular member 3 can be performed to synchronously drive the third tubular member 3 relative to the third tubular member 3 relative to the second tubular member 2.

[0055] In short, the carrier frame 100 of the present invention has a folding unit 4 positioned on top. The folding unit 4 includes a rotating frame 41, a first rod 42, a connecting rod 43, and a second rod 44. The rotating frame 41 rotates relative to the rotating part 10 and the second tubular member 2. One end of the first rod 42 rotates relative to the rotating frame 41 at a first rotation point a, and the other end of the first rod 42 rotates relative to the rotating frame 41 at a second rotation point b, so that the rotating frame 41 and the first rod 42 can cooperate to form a quadrilateral structure. One end of the connecting rod 43 rotates relative to the first tubular member 1, and the other end of the connecting rod 43 rotates relative to the rotating frame 41 at a third rotation point. The end of the second rod 44 is rotated relative to the third tubular member 3, and the other end of the second rod 44 is rotated relative to the connecting rod 43 at a fourth rotation point. The second rotation point b, the third rotation point and the fourth rotation point are located on the same pivot axis and cooperate with the rotating frame 41, the first rod 42 and the second rod 44 to form a coupling structure. The design allows the connecting rod 43 to drive the second rod 44 so that it folds relative to the rotating frame 41 by the folding of the first tubular member 1 relative to the third tubular member 3, thereby achieving the objective that the folding of the first tubular member 1 relative to the third tubular member 3 can be driven to fold relative to the second tubular member 2. In this manner, the carrier frame 100 of the present invention can be released and folded synchronously, and has the advantages of being easy to fold, having a simple structure, and being convenient to operate.

[0056] Those skilled in the art will readily see that many modifications and variations of the device and method can be made while retaining the teachings of the present invention. Therefore, the above disclosure should be construed as being limited only by the boundaries of the appended claims. [Explanation of Symbols]

[0057] 1. First tubular member 2. Second tubular member 3. Third tubular member 4 Folding Unit 5. Fourth tubular member 6 Guardrail 7. First locking device 8 Locking structure 9. Second locking device 10 Rotating parts 11 Fixed pillar 41 Rotating Frame 42 First Rod 43 Connecting rod 44 Second rod 71 First tension member 72 Pressing member 73. First mounting base 74 Second mounting base 75 Locking member 76 First elastic member 77 Drive Member 81 Torsion spring 91 Second tension member 92 Engaging member 93 Engaging Member 94 First fixing member 95 Second fixing member 96 Operating Member 97 Second elastic member 100 Carrier Frame 411 The third rod 412 The fourth rod 413 The Fifth Rod 431 recess 721 Slanted surface 722 First winding slot 731 Protrusion 732 First tooth structure 741 Second tooth structure 751 Engaging tooth structure 771 Second winding slot 772 Insertion Slots 811 Engaging Hook a. First point of rotation b Second point of rotation

Claims

1. A first tubular member (1) and A second tubular member (2) is rotatable relative to the first tubular member (1), A third tubular member (3) is rotatable relative to the second tubular member (2) so as to cooperate with the first tubular member (1) and the second tubular member (2) to form a rotating portion (10), In a carrier frame (100) equipped with, The carrier frame (100) includes a folding unit (4), and the folding unit (4) is A coupling rod (43) whose end is rotatable relative to the first tubular member (1), A second rod (44) whose end is rotatable relative to the third tubular member (3) and whose other end is rotatable relative to the other end of the connecting rod (43), A fifth rod (413) whose end is rotatable relative to the second tubular member (2) and whose other end is rotatable relative to the second rod (44), Equipped with, A carrier frame (100) characterized in that the folding of the first tubular member (1) relative to the third tubular member (3) is driven via the connecting rod (43) to the second rod (44) so ​​that it folds relative to the fifth rod (413), thereby folding the third tubular member (3) relative to the second tubular member (2).

2. The aforementioned folding unit (4) is A rotating frame (41) is hinged to the rotating part (10) and the second tubular member (2), A first rod (42) having one end that rotates relative to the rotating frame (41) at a first pivot point and the other end that rotates relative to the rotating frame (41) at a second pivot point, wherein the first pivot point and the second pivot point are located on the rotating frame (41), Equipped with, Another end of the connecting rod (43) is rotated relative to the rotating frame (41) at the third pivot point. The carrier frame (100) according to claim 1, characterized in that the connecting rod (43), the rotating frame (41), the first rod (42), and the second rod (44) form a connecting structure.

3. The carrier frame (100) according to claim 1 or 2, wherein the rotating frame (41) comprises a third rod (411) connected to a fourth rod (412), the fourth rod (412) connected to a fifth rod (413), and the fifth rod (413), the first rod (42) is rotated relative to the third rod (411) at the first rotation point, the first rod (42) is rotated relative to the fifth rod (413) at the second rotation point, and the third rod (411) is rotated relative to the rotating part (10).

4. The carrier frame (100) according to claim 1 or 2, characterized in that the connecting rod (43) has a recess (431) for providing a position in which the rotating frame (41) is hinged to the rotating part (10).

5. The carrier frame (100) according to claim 1 or 2, further comprising a first locking device (7) for locking the rotation of the first tubular member (1) relative to the third tubular member (3), wherein the first locking device (7) is located on the rotating portion (10).

6. The carrier frame (100) according to claim 5, further comprising a fourth tubular member (5) that rotates relative to the first tubular member (1), wherein the folding of the fourth tubular member (5) relative to the first tubular member (1) releases the first locking device (7).

7. The first locking device (7) comprises a first tensioning member (71), a pressing member (72), a first mounting base (73), a second mounting base (74), and a locking member (75), wherein the first tubular member (1) is connected to the first mounting base (73), the third tubular member (3) is connected to the second mounting base (74), the first mounting base (73) is rotatable relative to the second mounting base (74), and the locking member (75) is movably positioned between the first mounting base (73) and the second mounting base (74). The carrier frame (100) according to claim 6, characterized in that the pressing member (72) is positioned between the first mounting base (73) and the locking member (75), the pressing member (72) and the locking member (75) are in contact with each other, the end of the first tensioning member (71) is connected to the pressing member (72), and when the first tensioning member (71) pulls the pressing member (72), the pressing member (72) pushes the locking member (75) to release the first mounting base (73) from the second mounting base (74).

8. The carrier frame (100) according to claim 7, characterized in that a projection (731) extends from the first mounting base (73) toward the pressing member (72), an inclined surface (721) is formed on the pressing member (72) corresponding to the projection (731), the end of the first tension member (71) is wrapped around the pressing member (72), the first tension member (71) pulls the pressing member (72) so as to rotate the projection (731) toward the inclined surface (721), and the projection (731) abuts against the inclined surface (721) so as to push and move the locking member (75).

9. The carrier frame (100) according to claim 7, characterized in that the first locking device (7) further comprises a first elastic member (76) disposed between the second mounting base (74) and the locking member (75).

10. The locking member (75) has an engaging tooth structure (751), the first tooth structure (732) is formed on the first mounting base (73), and the second tooth structure (741) is formed on the second mounting base (74). The first elastic member (76) pushes the engaging tooth structure (751), thereby causing the engaging tooth structure (751) to engage with the first tooth structure (732) and the second tooth structure (741), locking the first mounting base (73) and the second mounting base (74). The carrier frame (100) according to claim 9, characterized in that the pressing member (72) presses the engaging tooth structure (751) to overcome the elastic force of the first elastic member (76) and release the first mounting base (73) from the second mounting base (74).

11. The carrier frame (100) according to claim 7, wherein the first locking device (7) further comprises a drive member (77) disposed through the first tubular member (1) and the fourth tubular member (5) and engaged with the fourth tubular member (5), the other end of the first tension member (71) being wound over the drive member (77), and the folding of the fourth tubular member (5) relative to the first tubular member (1) allows the drive member (77) to rotate and pull the first tension member (71).

12. The carrier frame (100) according to claim 11, further comprising a locking structure (8) for locking the first tubular member (1) and the fourth tubular member (5) in a folded state.

13. The carrier frame (100) according to claim 12, wherein the locking structure (8) comprises a torsion spring (81), one end of which is mounted on the drive member (77), and the other end of which has an engagement hook (811), and when the fixed pillar (11) extends outward from the first tubular member (1) and the fourth tubular member (5) is folded on the first tubular member (1), the drive member (77) drives the engagement hook (811) to engage the engagement hook (811) with the fixed pillar (11).

14. The carrier frame (100) according to claim 6, further comprising a second locking device (9) positioned between the first tubular member (1) and the fourth tubular member (5) to lock the rotation of the fourth tubular member (5) relative to the first tubular member (1).

15. The second locking device (9) comprises a second tensioning member (91), an engaging member (92), a meshing member (93), a first fixing member (94), a second fixing member (95), and an operating member (96), wherein the first tubular member (1) is connected to the first fixing member (94), the fourth tubular member (5) is connected to the second fixing member (95), the first fixing member (94) is connected to the second fixing member (95), the meshing member (93) is connected to the first fixing member (94), and the engaging member (92) is slidably mounted on the second fixing member (95). The carrier frame (100) according to claim 14, characterized in that the engaging member (92) is positioned and engages with the interlocking member (93) to lock the first tubular member (1) and the fourth tubular member (5) in an extended state, one end of the second tension member (91) is connected to the operating member (96), the other end of the second tension member (91) is connected to the engaging member (92), and the operating member (96) is operated to disengage the engaging member (92) from the interlocking member (93) via the second tension member (91).

16. The carrier frame (100) according to claim 15, wherein the second locking device (9) further comprises a second elastic member (97), the second elastic member (97) providing an elastic force for engaging the engaging member (92) with the meshing member (93).

17. The carrier frame (100) according to claim 6, characterized in that when the fourth tubular member (5) is folded on the first tubular member (1), the first tubular member (1) and the fourth tubular member (5) cooperate to form a support leg structure.

18. A first tubular member (1) and A second tubular member (2) is rotatable relative to the first tubular member (1), A third tubular member (3) is rotatable relative to the second tubular member (2) so as to cooperate with the first tubular member (1) and the second tubular member (2) to form a rotating portion (10), A fourth tubular member (5) is rotatable relative to the first tubular member (1) and foldable relative to the first tubular member (1), A second locking device (9) for locking the rotation of the fourth tubular member (5) relative to the first tubular member (1), the second locking device (9) comprising an engaging member (92) and a meshing member (93) connected to the first tubular member (1), wherein the engaging member (92) is slidably positioned on the fourth tubular member (5), and the engaging member (92) engages with the meshing member (93) in an extended state to lock the first tubular member (1) and the fourth tubular member (5), Folding unit (4), A carrier frame (100) comprising the folding unit (4) A connecting rod (43) having one end that rotates relative to the first tubular member (1) and the other end that rotates relative to the second tubular member (2), A second rod (44) whose end is rotatable relative to the third tubular member (3), A fifth rod (413) whose end is rotatable relative to the second tubular member (2) and whose other end is rotatable relative to the other end of the second rod (44), Equipped with, A carrier frame (100) characterized in that the folding of the first tubular member (1) relative to the third tubular member (3) is driven via the connecting rod (43) to the second rod (44) so ​​that it folds relative to the fifth rod (413), thereby folding the third tubular member (3) relative to the second tubular member (2).

19. The aforementioned folding unit (4) is A rotating frame (41) is hinged to the rotating part (10) and the second tubular member (2), A first rod (42) having one end that rotates relative to the rotating frame (41) at a first pivot point and the other end that rotates relative to the rotating frame (41) at a second pivot point, wherein the first pivot point and the second pivot point are located on the rotating frame (41), A carrier frame (100) according to claim 18, characterized by comprising the above.

20. The carrier frame (100) according to claim 18, wherein the second locking device (9) further comprises a second tension member (91), a first fixing member (94), and a second fixing member (95), the first tubular member (1) being connected to the first fixing member (94), the fourth tubular member (5) being connected to the second fixing member (95), the first fixing member (94) being connected to the second fixing member (95), the interlocking member (93) being connected to the first fixing member (94), the engaging member (92) being slidably disposed on the second fixing member (95), the end of the second tension member (91) being connected to the engaging member (92), and the engaging member (92) being disengaged from the interlocking member (93) via the second tension member (91).

21. The carrier frame (100) according to claim 20, characterized in that the first fixing member (94) and the second fixing member (95) are fitted together with each other.

22. The carrier frame (100) according to claim 20, wherein the second locking device (9) further comprises a second elastic member (97), the second elastic member (97) providing an elastic force for engaging the engaging member (92) with the interlocking member (93).

23. The carrier frame (100) according to claim 20, wherein a pillar extends from the engaging member (92) toward the interlocking member (93), and an engaging hole structure is formed on the interlocking member (93) corresponding to the pillar.

24. The carrier frame (100) according to claim 18, characterized in that when the fourth tubular member (5) is folded on the first tubular member (1), the first tubular member (1) and the fourth tubular member (5) cooperate to form a support leg structure.

25. The carrier frame (100) according to claim 20, wherein the second locking device (9) further comprises an operating member (96), the other end of the second tension member (91) being connected to the operating member (96), and the operating member (96) is operated to disengage the engaging member (92) from the interlocking member (93) via the second tension member (91).

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