Frame

Abstract

The frame disclosed in the present invention comprises a first tube, a second tube, a third tube and a folding unit, and the folding unit comprises a pivot frame, a first rod, a connecting rod and a second rod, the pivot frame is pivoted to the pivot part, and the pivot frame is pivoted to the second tube; one end of the first rod is pivoted to the pivot frame at a first pivot point, and the other end of the first rod is pivoted to the pivot frame at a second pivot point; one end of the connecting rod is pivoted to the first tube, and the other end of the connecting rod is pivoted to the pivot frame at a third pivot point; one end of the second rod is pivoted to the third tube, and the other end of the second rod is pivoted to the connecting rod at a fourth pivot point, and the second pivot point, the third pivot point and the fourth pivot point are on the same pivot axis. The frame of the present invention can realize the overall synchronous release and folding of the frame, improve the folding stability of the frame, and has the advantages of convenient folding, simple structure and convenient operation.

Description

Technical Field

[0001] The invention relates to a vehicle frame, in particular to a foldable vehicle frame. Background Art

[0002] In order to meet the practicality and portability requirements of consumers, the frame structure of the vehicle is generally designed to be foldable, so that it can be fully opened when in use, and can be folded into a smaller size when not in use for easy storage or carrying.

[0003] Generally, a bicycle frame needs to fold up multiple pipes such as the front foot, rear foot and rider, so a folding mechanism is set between the front foot and the rear foot and between the front foot and the rider, or a folding mechanism is set between the front foot and the rear foot and between the rear foot and the rider. Therefore, when folding the bicycle frame, it is necessary to bend down to fold up the front foot and the rear foot first, and then fold up the rider, so as to achieve the overall folding of the frame. Therefore, it can be obtained that during the entire folding process, multiple operating actions or operating steps need to be operated by both hands, and the operation is cumbersome. Moreover, the user must bend down to fold the bicycle frame, which is inconvenient and troublesome to use.

[0004] In order to solve the above problems, it is necessary to provide a frame. Summary of the invention

[0005] An object of the present invention is to provide a bicycle frame which can realize the overall synchronous unlocking and folding of the frame body and has the advantages of convenient folding, simple structure and easy operation.

[0006] Another object of the present invention is to provide a bicycle frame which can improve the stability of the frame when it is folded and has the advantages of being easy to fold, having a simple structure and being easy to operate.

[0007] In order to achieve the above-mentioned purpose, the frame provided by the present invention includes a first tube, a second tube and a third tube, the first tube is pivotally connected to the second tube, the second tube is pivotally connected to the third tube, and the pivots between the first tube, the second tube and the third tube jointly form a pivot part, the frame also includes a folding unit, the folding unit includes a pivot frame, a first rod, a connecting rod and a second rod, the pivot frame is pivotally connected to the pivot part, and the pivot frame is pivotally connected to the second tube; one end of the first rod is pivotally connected to the pivot frame at the first pivot point, and the first rod The other end is pivoted to the pivot frame at a second pivot point; one end of the connecting rod is pivoted to the first tube, and the other end of the connecting rod is pivoted to the pivot frame at a third pivot point; one end of the second rod is pivoted to the third tube, and the other end of the second rod is pivoted to the connecting rod at a fourth pivot point. The second pivot point, the third pivot point and the fourth pivot point are on the same pivot axis. By pivoting and retracting the first tube relative to the third tube, the connecting rod links the second rod to pivot and retract relative to the pivot frame, so that the third tube is pivoted and retracted relative to the second tube.

[0008] Compared with the prior art, the frame of the present invention is provided with a folding unit, which includes a pivot frame, a first rod, a connecting rod and a second rod. The pivot frame is pivotally connected to the pivot portion, and the pivot frame is pivotally connected to the second tube. One end of the first rod is pivotally connected to the pivot frame at a first pivot point, and the other end of the first rod is pivotally connected to the pivot frame at a second pivot point, so that the pivot frame and the first rod together form a quadrilateral structure. One end of the connecting rod is pivotally connected to the first tube, and the other end of the connecting rod is pivotally connected to the pivot frame at a third pivot point. One end of the second rod is pivotally connected to the third tube, and the other end of the second rod is pivotally connected to the connecting rod at The fourth pivot point, the second pivot point, the third pivot point and the fourth pivot point are on the same pivot axis, so that the pivot frame, the first rod and the second rod together form a linkage structure, and the first tube is pivotally retracted relative to the third tube so that the linkage rod links the second rod to pivot and retract relative to the pivot frame, so that the third tube is pivotally retracted relative to the second tube, thereby achieving the pivotal retraction between the first tube and the third tube and the pivotal retraction between the second tube and the third tube. The frame of the present invention can realize the overall synchronous release and folding of the frame, and has the advantages of convenient folding, simple structure and easy operation.

[0009] Preferably, the pivot frame includes a third rod, a fourth rod and a fifth rod connected in sequence, the first rod and the third rod are pivoted at a first pivot point, the first rod and the fifth rod are pivoted at a second pivot point, the third rod is pivoted to the pivot portion, and the connection between the fourth rod and the fifth rod is pivoted to the second tube.

[0010] Preferably, the pivot frame and the first rod together form a trapezoidal structure.

[0011] Preferably, the linkage rod has an escape recess for escaping the pivotal connection between the pivot frame and the pivot portion.

[0012] Preferably, the frame further comprises a protection rail, which is connected to the linkage rod, and when the first tube, the second tube and the third tube are relatively pivoted and folded, the protection rail forms an upward handle structure.

[0013] Preferably, the frame further comprises a first locking device, which is used to lock the pivoting between the first tube and the third tube, and the first locking device is arranged at the pivoting portion.

[0014] Specifically, the frame further includes a fourth tube member, which is pivotally connected to the first tube member, and the first locking device is released by the pivoting and retracting of the first tube member and the fourth tube member.

[0015] Specifically, the first locking device includes a first traction member, a pushing member, a first mounting seat, a second mounting seat and a locking member. The first tube member is connected to the first mounting seat, the third tube member is connected to the second mounting seat, the first mounting seat is pivotally connected to the second mounting seat, the locking member is movably arranged between the first mounting seat and the second mounting seat, the pushing member is located between the first mounting seat and the locking member, the pushing member is elastically abutted against the locking member, one end of the first traction member is connected to the pushing member, and when the first tube member and the fourth tube member are pivotally retracted, the pushing member pushes the locking member to move under the traction of the first traction member to release the pivotal connection of the first mounting seat relative to the second mounting seat.

[0016] Specifically, the first mounting seat extends toward the pushing member to form a pushing protrusion, and the pushing member is provided with a matching pushing inclined surface corresponding to the pushing protrusion. One end of the first traction member is wrapped around the pushing member, and the pushing member rotates under the traction of the first traction member so that the pushing protrusion abuts against the matching pushing inclined surface, and the pushing member pushes the locking member to move by the abutment of the pushing protrusion against the matching pushing inclined surface.

[0017] Specifically, the push-matching inclined surface is a spiral inclined surface provided on the push-pushing member.

[0018] Specifically, the pushing member is provided with a first spiral winding groove corresponding to the first traction member, and the first traction member is wound around the first winding groove.

[0019] Specifically, the first locking device also includes a first elastic member, which is arranged between the second mounting seat and the locking member. The first elastic member constantly biases the locking member onto the first mounting seat and causes the pushing member and the locking member to be elastically pressed against each other.

[0020] Specifically, the locking member has an engaging tooth, the first mounting seat is provided with a first tooth that cooperates with the engaging tooth, and the second mounting seat is provided with a second tooth that cooperates with the engaging tooth. Under the pressure of the first elastic member, the engaging tooth simultaneously engages with the first tooth and the second tooth to form a locking shape. Under the pressure of the pushing member, the engaging tooth overcomes the elastic force of the first elastic member and withdraws from the first tooth to release the lock.

[0021] Specifically, the locking member moves along the pivot axis between the first mounting seat and the second mounting seat.

[0022] Specifically, the pushing member moves along the pivot axis between the first mounting seat and the second mounting seat.

[0023] Specifically, the first locking device also includes a driving member, which is inserted into the first tube and the fourth tube, and the driving member is engaged with the fourth tube. The other end of the first traction member is wrapped around the driving member, and the driving member rotates and pulls the first traction member by pivoting and retracting the first tube and the fourth tube.

[0024] Specifically, the driving member is provided with a second winding groove corresponding to the first traction member, and the first traction member is wound around the second winding groove.

[0025] Specifically, the vehicle frame further includes a folding structure for locking the folded state between the first tube and the fourth tube.

[0026] Specifically, the folding structure is a torsion spring, one end of which is installed on the driving member, and the other end of the torsion spring has a snap buckle. The first tube extends outward to form a fixed ring that cooperates with the snap buckle. When the fourth tube is folded into the first tube, the snap buckle is snapped with the fixed ring under the drive of the driving member.

[0027] Specifically, the driving member is provided with an insertion groove corresponding to the torsion spring.

[0028] Specifically, the frame further includes a second locking device, which is used to lock the pivoting between the first tube and the fourth tube, and the second locking device is arranged between the first tube and the fourth tube.

[0029] Specifically, the second locking device includes a second traction member, a clamping member, a matching member, a first fixing member, a second fixing member and an operating member. The first tube member is connected to the first fixing member, the fourth tube member is connected to the second fixing member, the first fixing member and the second fixing member are socketed with each other, the first fixing member and the second fixing member are pivotally connected, the matching member is fixed to the first fixing member, the clamping member is slidably provided on the second fixing member, the clamping member is clamped with the matching member to lock the first tube member and the fourth tube member in the expanded state, one end of the second traction member is connected to the operating member, and the other end of the second traction member is connected to the clamping member, and the operating member is operated to make the clamping member unclamp from the matching member under the traction of the second traction member.

[0030] Specifically, the second locking device further includes a second elastic member, and the second elastic member constantly provides an elastic force that enables the engaging member to engage with the matching member.

[0031] Specifically, the engaging member extends toward the matching member to form a clamping column, and the matching member is provided with a clamping structure corresponding to the clamping column.

[0032] Specifically, the first tube and the fourth tube can be pivotally folded together to form an anti-falling support leg structure.

[0033] In order to achieve the above-mentioned purpose, the frame provided by the present invention includes a first tube, a second tube, a third tube and a fourth tube, the first tube is pivotally connected to the second tube, the second tube is pivotally connected to the third tube, the fourth tube is pivotally connected to the first tube, the first tube and the fourth tube are pivotally folded relative to each other, and the frame also includes a folding structure for locking the folded state between the first tube and the fourth tube.

[0034] Preferably, the folding structure is a torsion spring, one end of which is installed on the driving member at the fourth tube, and the other end of the torsion spring has a snap buckle. The first tube extends outward to form a fixed ring that cooperates with the snap buckle. When the fourth tube is folded into the first tube, the snap buckle is driven by the driving member to engage with the fixed ring.

[0035] Specifically, the driving member is provided with an insertion groove corresponding to the torsion spring.

[0036] Specifically, the first tube and the fourth tube can be pivotally folded together to form an anti-falling support leg structure.

[0037] Compared with the prior art, the frame of the present invention has a folding structure between the first tube and the fourth tube, and the folding structure is used to lock the folded state between the first tube and the fourth tube, thereby preventing the frame from accidentally unfolding during transportation, improving the folding stability, and having the advantages of simple structure and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the planar structure in the side view direction when the fourth tube member in the frame of the present invention is folded relative to the first tube member, and the first tube member, the second tube member and the third tube member are in an unfolded state.

[0039] Figure 2 It is a schematic diagram of the planar structure in the side view direction of the fourth tube in the frame of the present invention being folded relative to the first tube, and the first tube, the second tube and the third tube are in the folding process.

[0040] Figure 3 It is a schematic diagram of the planar structure in the side view direction when the first tube member, the second tube member, the third tube member and the fourth tube member in the frame of the present invention are in a folded state.

[0041] Figure 4 It is a schematic diagram of the three-dimensional structure of the frame of the present invention when it is in an unfolded state.

[0042] Figure 5 It is another three-dimensional structural schematic diagram when the frame of the present invention is in an unfolded state.

[0043] Figure 6 It is a three-dimensional structural schematic diagram of the frame of the present invention in the folding process.

[0044] Figure 7 It is a schematic diagram of the three-dimensional structure of the frame of the present invention after being completely folded.

[0045] Figure 8 It is a schematic diagram of the internal structure of the frame of the present invention when it is in an unfolded state in a side view direction.

[0046] Fig. 9 It is a schematic structural diagram of the frame of the present invention when it is in an unfolded state and after being cut.

[0047] Fig.10 yes Fig. 9 A partial enlarged view of point A in the middle.

[0048] Fig.11It is a schematic structural diagram of the frame of the present invention when it is in an expanded state and in a disassembled state.

[0049] Fig.12 yes Fig.11 A partial enlarged view of point B in the middle.

[0050] Fig.13 It is another structural schematic diagram of the frame of the present invention when it is in an expanded state and in a disassembled state.

[0051] Fig.14 It is a schematic structural diagram of the frame of the present invention when it is in an expanded state and in a disassembled state.

[0052] Fig.15 yes Fig.14 A partial enlarged view of point C in the middle.

[0053] Fig.16 It is a three-dimensional schematic diagram of the push member in the frame of the present invention.

[0054] Fig.17 It is a schematic diagram of the three-dimensional structure of the frame of the present invention when the fourth tube member is folded relative to the first tube member.

[0055] Fig.18 It is another structural schematic diagram of the frame of the present invention when it is in an expanded state and in a disassembled state.

[0056] Fig.19 It is a three-dimensional structural schematic diagram of the driving member in the frame of the present invention. DETAILED DESCRIPTION

[0057] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0058] See also Figures 1 to 7The frame 100 provided by the present invention includes a first tube 1, a second tube 2 and a third tube 3. The first tube 1 is pivotally connected to the second tube 2, so as to realize the relative pivoting and retracting between the first tube 1 and the second tube 2. The second tube 2 is pivotally connected to the third tube 3, so as to realize the relative pivoting and retracting between the second tube 2 and the third tube 3. The first tube 1, the second tube 2 and the third tube 3 are pivotally connected at the same point. The pivoting parts between the first tube 1, the second tube 2 and the third tube 3 jointly form a pivoting part 10. The pivoting part 10 is located at the first tube 1, the second tube 2 and the third tube 3, the frame 100 also includes a folding unit 4, the folding unit 4 includes a pivot frame 41, a first rod 42, a connecting rod 43 and a second rod 44, the pivot frame 41 is pivoted to the pivot portion 10, the pivot frame 41 is pivoted to the second tube 2, the pivot point between the pivot frame 41 and the pivot portion 10 and the pivot point between the pivot frame 41 and the second tube 2 are spaced apart; one end of the first rod 42 is pivoted to the pivot frame 41 at a first pivot point a, the other end of the first rod 42 is pivoted to the pivot frame 41 at a second pivot point b, the first pivot point and the second pivot point are spaced apart , so that the pivot frame 41 and the first rod 42 together form a quadrilateral structure; one end of the connecting rod 43 is pivoted to the first pipe 1, and the other end of the connecting rod 43 is pivoted to the pivot frame 41 at the third pivot point. The connecting rod 43 is a sheet-like structure, and the connecting rod 43 has an avoidance recess 431 for avoiding the pivotal joint between the pivot frame 41 and the pivoting portion 10. The setting of the avoidance recess 431 can form an avoidance structure, which can avoid the pivotal movement of the connecting rod 43 and the pivotal movement of the pivot frame 41 from interfering, thereby making the components more compact; one end of the second rod 44 is pivoted to the third pipe 3 The other end of the second rod 44 is pivotally connected to the connecting rod 43 at a fourth pivot point. The second pivot point b, the third pivot point and the fourth pivot point are on the same pivot axis, so that the pivot frame 41, the first rod 42 and the second rod 44 together form a linkage structure. By pivoting and retracting the first tube 1 relative to the third tube 3, the connecting rod 43 links the second rod 44 to pivot and retract relative to the pivot frame 41, so that the third tube 3 pivots and retracts relative to the second tube 2, thereby achieving the pivoting and retracting between the first tube 1 and the third tube 3 and linking the pivoting and retracting between the second tube 2 and the third tube 3. When the frame 100 is folded, the linkage generated by the rotation of the first tube 1 relative to the third tube 3 can simultaneously drive the second tube 2 and the third tube 3 to approach each other to achieve folding. Therefore, it is only necessary to rotate the first tube 1 to synchronously drive the third tube 3 to approach and fold relative to the second tube 2, thereby avoiding the user from folding the second tube 2 and the third tube 3 again, thereby improving the convenience of use. The frame 100 structure of the present invention is suitable for foldable devices such as scaffolds, folding ladders, folding wheelchairs and baby strollers, but is not limited thereto. In order to more clearly explain the specific structure of the frame 100, the following will be described. Figures 1 to 19The frame 100 of the baby stroller shown in the figure is used as an example for detailed description: the first tube 1 in the frame 100 is the handle of the baby stroller, the second tube 2 is the front leg tube of the baby stroller, and the third tube 3 is the rear leg tube of the baby stroller. The front leg tube and the rear leg tube can be moved closer or farther away from each other by turning the handle to fold or unfold the frame 100. Therefore, the user only needs to operate the handle to realize the overall folding or unfolding of the frame 100, which overcomes the defect that the user must bend over to fold the front leg tube and the rear leg tube of the baby stroller in the traditional way, thereby improving convenience. More specifically, as follows:

[0059] See also Figure 4-Figure 7 The pivot frame 41 includes a third rod 411, a fourth rod 412 and a fifth rod 413 connected in sequence, the first rod 42 and the third rod 411 are pivoted at a first pivot point a, the first rod 42 and the fifth rod 413 are pivoted at a second pivot point b, the third rod 411 is pivoted to the pivoting portion 10, and the connection between the fourth rod 412 and the fifth rod 413 is pivoted to the second tube 2, so that a linkage mechanism is formed between the first rod 42, the second rod 44, the third rod 411, the fourth rod 412 and the fifth rod 413, so that the pivoting and retracting of the first tube 1 relative to the third tube 3 can drive the pivoting and retracting of the third tube 3 relative to the second tube 2. Preferably, the pivot frame 41 and the first rod 42 together form a trapezoidal structure. In this embodiment, the pivot frame 41 and the first rod 42 together form a right-angle trapezoidal structure.

[0060] See also Figure 1-Figure 4 The frame 100 provided by the present invention further includes a guardrail 6, which is connected to the linkage rod 43. When the first tube 1, the second tube 2 and the third tube 3 are relatively pivoted and folded, the guardrail 6 forms an upward handle structure (the state is as shown in FIG. Figure 3 Such a configuration can facilitate the transportation of the frame 100 and improve the convenience of use.

[0061] See also Figure 8-Figure 16The frame 100 provided by the present invention also includes a first locking device 7 and a fourth tube 5. The first locking device 7 is used to lock the pivot between the first tube 1 and the third tube 3. The first locking device 7 is arranged on the pivot portion 10. The fourth tube 5 is pivotally connected to the first tube 1. The first locking device 7 is released by the pivoting and retracting movement between the first tube 1 and the fourth tube 5. In other words, there is no need to set an operating member 96 at the first locking device 7. The user only needs to pivot the first tube 1 and the fourth tube 5 to release the first locking device 7. For example, the first locking device 7 includes a first traction member 71, a pushing member 72, a first mounting seat 73, a second mounting seat 74, a locking member 75 and a first elastic member 76. The first pipe member 1 is connected to the first mounting seat 73, the third pipe member 3 is connected to the second mounting seat 74, the first mounting seat 73 is pivotally connected to the second mounting seat 74, the pivoting and retracting between the first mounting seat 73 and the second mounting seat 74 can drive the pivoting and retracting between the first pipe member 1 and the second pipe member 2, and locking the pivoting between the first mounting seat 73 and the second mounting seat 74 can lock the pivoting between the first pipe member 1 and the second pipe member 2. The locking member 75 is movably arranged between the first mounting seat 73 and the second mounting seat 74, and the pushing member 72 is located between the first mounting seat 73 and the second mounting seat The locking member 75 is moved along the pivot axis between the first mounting seat 73 and the second mounting seat 74, and the pushing member 72 is moved along the pivot axis between the first mounting seat 73 and the second mounting seat 74 to release the pivot connection of the first mounting seat 73 relative to the second mounting seat 74.

[0062] See also Figure 8 , Figure 10-Figure 16The first mounting seat 73 extends toward the pushing member 72 to form a pushing protrusion 731, and the pushing member 72 is provided with a matching pushing inclined surface 721 corresponding to the pushing protrusion 731. One end of the first traction member 71 is wrapped around the pushing member 72, and the pushing member 72 rotates under the traction of the first traction member 71 so that the pushing protrusion 731 abuts against the matching pushing inclined surface 721, and the pushing member 72 pushes the locking member 75 to move by the pushing protrusion 731 against the matching pushing inclined surface 721. In other words, the height difference of the matching pushing inclined surface 721 of the pushing member 72 during the rotation process is used to make the pushing protrusion 731 and the matching pushing inclined surface 721 abut against each other, so that the pushing member 72 moves along the pivot axis between the first mounting seat 73 and the second mounting seat 74, and then the locking member 75 moves along the pivot axis between the first mounting seat 73 and the second mounting seat 74 under the push of the pushing member 72 to achieve locking or releasing. The push-push inclined surface 721 is a spiral inclined surface provided on the push member 72. In this embodiment, three push-push protrusions 731 are provided on the first mounting seat 73. The three push-push protrusions 731 are symmetrically arranged along the pivot axis between the first mounting seat 73 and the second mounting seat 74. The three push-push protrusions 731 are arranged at equal intervals. Correspondingly, three push-push inclined surfaces 721 are provided on the push member 72. The three push-push inclined surfaces 721 are symmetrically arranged along the pivot axis between the first mounting seat 73 and the second mounting seat 74. The three push-push inclined surfaces 721 are arranged at equal intervals. In addition, the push member 72 is provided with a spiral first winding groove 722 corresponding to the first traction member 71. The first traction member 71 is wound around the first winding groove 722. The setting of the first winding groove 722 can avoid interference between the movements of the components, thereby making the components more compact. Preferably, the first traction member 71 is a steel wire rope, but is not limited thereto.

[0063] See also Figure 13-Figure 15The locking member 75 has an engaging tooth 751. The first mounting seat 73 is provided with a first tooth 732 that cooperates with the engaging tooth 751. The second mounting seat 74 is provided with a second tooth 741 that cooperates with the engaging tooth 751. The engaging tooth 751 is engaged with the first tooth 732 and the second tooth 741 at the same time under the pressure of the first elastic member 76 to form a locking state. The engaging tooth 751 overcomes the elastic force of the first elastic member 76 under the push of the pushing member 72 and withdraws from the first tooth 732 to release the lock. That is, when the engaging tooth 751 is engaged with the first tooth 732 and the second tooth 741 at the same time, the engaging tooth 751 is used to lock the relative positions of the first tooth 732 and the second tooth 741 so that the first mounting seat 73 and the second mounting seat 74 cannot move relative to each other. When the engaging teeth 751 overcome the elastic force under the push of the pushing member 72 and withdraw from the first teeth 732 and fully extend into the second teeth 741, the engaging teeth 751 and the first teeth 732 are retracted, and the engaging teeth 751 no longer restrict the relative positions of the first teeth 732 and the second teeth 741, so that the first mounting seat 73 and the second mounting seat 74 can pivot relative to each other, thereby realizing the free pivoting between the first pipe fitting 1 and the third pipe fitting 3. The structure is simple and the locking is flexible. Preferably, the engaging teeth 751 are distributed circumferentially, and correspondingly, the first teeth 732 and the second teeth 741 are both distributed circumferentially, so that the locking of the engaging teeth 751 is more stable.

[0064] See also Figure 8 Of Fig.10 as well as Fig.18 Of Fig.19 The first locking device 7 also includes a driving member 77. The first pipe 1 is connected to a first fixing member 94, and the second pipe 2 is connected to a second fixing member 95. The driving member 77 is inserted into the first fixing member 94 and the second fixing member 95. The driving member 77 is engaged with the fourth pipe 5. The other end of the first traction member 71 is wound around the driving member 77. The first pipe 1 and the fourth pipe 5 are pivotally retracted to make the driving member 77 rotate and pull the first traction member 71, so that the first traction member 71 pulls the push member 72 to rotate. Specifically, the driving member 77 is provided with a second winding groove 771 corresponding to the first traction member 71. The first traction member 71 is wound around the second winding groove 771. The setting of the second winding groove 771 can avoid interference between the movements of the components, thereby making the components more compact.

[0065] See also Fig.18The frame 100 provided by the present invention further includes a folding structure 8 for locking the folded state between the first pipe 1 and the fourth pipe 5. For example, the folding structure 8 is a torsion spring 81, the driving member 77 is fixed to the fourth pipe 5 by snapping, the fourth pipe 5 pivots relative to the first pipe 1 to drive the driving member 77 to rotate, one end of the torsion spring 81 is installed on the driving member 77 at the fourth pipe 5, the other end of the torsion spring 81 has a snap buckle 811, the first pipe 1 extends outward to form a fixing ring 11 that cooperates with the snap buckle 811, the fixing ring 11 is provided on the first fixing member 94, when the fourth pipe 5 is folded in the first pipe 1, the snap buckle 811 is driven by the driving member 77 to snap with the fixing ring 11, thereby locking the first pipe 1 and the fourth pipe 5, and the first pipe 1 and the fourth pipe 5 can form an anti-falling support foot structure after pivoting and folding, so that the frame 100 can be effectively prevented from falling after folding. Specifically, the driving member 77 is provided with an insertion slot 772 corresponding to the torsion spring 81 , and the torsion spring 81 is installed on the driving member 77 through the insertion slot 772 , thereby avoiding interference in movement between the first traction member 71 and the torsion spring 81 .

[0066] See also Figure 8 as well as Fig.18The frame 100 provided by the present invention further includes a second locking device 9, which is used to lock the pivoting between the first tube 1 and the fourth tube 5, and the second locking device 9 is arranged between the first tube 1 and the fourth tube 5. For example, the second locking device 9 includes a second traction member 91, a clamping member 92, a matching clamping member 93, a first fixing member 94, a second fixing member 95, an operating member 96 and a second elastic member 97, the first tube 1 is connected to the first fixing member 94, the fourth tube 5 is connected to the second fixing member 95, the first fixing member 94 and the second fixing member 95 are mutually sleeved, the first fixing member 94 and the second fixing member 95 are pivotally connected, the matching clamping member 93 is sleeved inside the first fixing member 94, the matching clamping member 93 is fixed to the second fixing member 95, the second elastic member 97 is arranged on the fourth tube 5, one end of the second elastic member 97 is connected to the fourth tube 5, the other end of the second elastic member 97 is built into the clamping member 92 and connected to the clamping member 92, the clamping member 92 Slidingly disposed on the second fixing member 95, the second elastic member 97 constantly provides an elastic force to make the engaging member 92 engage with the matching member 93, and the engaging member 92 engages with the matching member 93 to lock the first pipe 1 and the fourth pipe 5 in the unfolded state. One end of the second traction member 91 is connected to the operating member 96, and the other end of the second traction member 91 is connected to the engaging member 92. The second traction member 91 moves along the axial direction of the fourth pipe 5. The operating member 96 is operated to make the engaging member 92 overcome the elastic force of the second elastic member 97 and unengage the matching member 93 under the traction of the second traction member 91, so that the first fixing member 94 and the second fixing member 95 can pivot freely, and then the first pipe 1 and the fourth pipe 5 can pivot freely. For example, the engaging member 92 extends toward the matching member 93 to form a clamping column, and the matching member 93 is provided with a bayonet structure corresponding to the clamping column, and the clamping column and the engaging structure are mutually engaged and pushed, and the cross section of the buckle structure is rectangular.

[0067] In summary, please refer to Figures 1 to 19 , the working process of the frame 100 of the present invention is described in detail:

[0068] When the baby stroller needs to be folded (see the unfolded state Figure 4 ), press the operating member 96, so that the engaging member 92 overcomes the elastic force of the second elastic member 97 and the matching member 93 under the traction of the second traction member 91, so that the first fixing member 94 and the second fixing member 95 can pivot freely, and then the first pipe member 1 and the fourth pipe member 5 can pivot freely, and the fourth pipe member 5 pivots and folds relative to the first pipe member 1 to form an anti-falling support foot structure (such as Figure 7As shown in the figure, during the process of the fourth tube member 5 pivoting and folding relative to the first tube member 1, the driving member 77 rotates, and the engaging buckle 811 is engaged with the fixing ring 11 under the drive of the driving member 77, thereby locking the folded state between the first tube member 1 and the fourth tube member 5. At the same time, the rotation of the driving member 77 drives the traction of the first traction member 71, and the pushing member 72 pushes the locking member 75 to move under the traction of the first traction member 71. The locking member 75 moves along the pivot axis between the first mounting seat 73 and the second mounting seat 74. The engaging tooth 751 overcomes the elastic force of the first elastic member 76 under the push of the pushing member 72, withdraws from the first tooth 732 and fully extends into the second tooth When the first tooth 732 is engaged, the locking tooth 751 no longer restricts the relative position of the first tooth 732 and the second tooth 741, so that the first mounting seat 73 and the second mounting seat 74 can pivot relative to each other, thereby allowing the first tube 1 and the third tube 3 to pivot freely. The pivoting and contracting of the first tube 1 relative to the third tube 3 causes the linkage rod 43 to link the second rod 44 to pivot and contract relative to the pivot frame 41, so that the third tube 3 can pivot and contract relative to the second tube 2, thereby achieving the pivoting and contracting between the first tube 1 and the third tube 3 and linking the pivoting and contracting between the second tube 2 and the third tube 3.

[0069] The frame 100 of the present invention is provided with a folding unit 4, which includes a pivot frame 41, a first rod 42, a connecting rod 43 and a second rod 44. The pivot frame 41 is pivoted to the pivot portion 10, and the pivot frame 41 is pivoted to the second tube 2; one end of the first rod 42 is pivoted to the pivot frame 41 at a first pivot point a, and the other end of the first rod 42 is pivoted to the pivot frame 41 at a second pivot point b, so that the pivot frame 41 and the first rod 42 together form a quadrilateral structure; one end of the connecting rod 43 is pivoted to the first tube 1, and the other end of the connecting rod 43 is pivoted to the pivot frame 41 at a third pivot point; one end of the second rod 44 is pivoted to the third tube 3, and the other end of the second rod 44 is pivoted to the The linkage rod 43 is pivoted at the fourth pivot point, and the second pivot point b, the third pivot point and the fourth pivot point are on the same pivot axis, so that the pivot frame 41, the first rod 42 and the second rod 44 together form a linkage structure. By pivoting and retracting the first tube 1 relative to the third tube 3, the linkage rod 43 links the second rod 44 to pivot and retract relative to the pivot frame 41, so that the third tube 3 pivots and retracts relative to the second tube 2, thereby achieving the pivoting and retracting between the first tube 1 and the third tube 3 and the pivoting and retracting between the second tube 2 and the third tube 3. The frame 100 of the present invention can realize the overall synchronous release and folding of the frame, and has the advantages of convenient folding, simple structure and easy operation.

[0070] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A frame, comprising a first tube, a second tube and a third tube, wherein the first tube is pivotally connected to the second tube, the second tube is pivotally connected to the third tube, and the pivots between the first tube, the second tube and the third tube jointly form a pivoting portion, characterized in that: The frame also includes: A folding unit, the folding unit comprising: A pivot frame, the pivot frame is pivotally connected to the pivot portion, and the pivot frame is pivotally connected to the second pipe; A first rod, one end of the first rod being pivotally connected to the pivot frame at a first pivot point, and the other end of the first rod being pivotally connected to the pivot frame at a second pivot point; A connecting rod, one end of which is pivotally connected to the first tube, and the other end of which is pivotally connected to the pivot frame at a third pivot point; A second rod member, one end of the second rod member is pivotally connected to the third tube member, and the other end of the second rod member is pivotally connected to the connecting rod at a fourth pivot point, the second pivot point, the third pivot point and the fourth pivot point are on the same pivot axis, and the first tube member is pivotally retracted relative to the third tube member so that the connecting rod links the second rod member to pivot and retract relative to the pivot frame, so that the third tube member is pivotally retracted relative to the second tube member.

2. The frame according to claim 1, characterized in that The pivot frame includes a third rod, a fourth rod and a fifth rod connected in sequence, the first rod and the third rod are pivoted at the first pivot point, the first rod and the fifth rod are pivoted at the second pivot point, the third rod is pivoted to the pivot portion, and the connection between the fourth rod and the fifth rod is pivoted to the second tube.

3. The frame according to claim 1, characterized in that: The pivot frame and the first rod together form a trapezoidal structure.

4. The frame according to claim 1, characterized in that: The linking rod has an escape recess for escaping the pivotal connection between the pivot frame and the pivoting portion.

5. The frame according to claim 1, characterized in that: It also includes a protection fence, which is connected to the linkage rod. When the first tube, the second tube and the third tube are relatively pivoted and folded, the protection fence forms an upward handle structure.

6. The frame according to claim 1, characterized in that: It also includes a first locking device, which is used to lock the pivoting between the first pipe and the third pipe, and the first locking device is arranged on the pivoting part.

7. The frame according to claim 6, characterized in that: The device further comprises a fourth tube member, wherein the fourth tube member is pivotally connected to the first tube member, and the first locking device is released by the pivoting and retracting movement between the first tube member and the fourth tube member.

8. The frame according to claim 7, characterized in that: The first locking device includes a first traction member, a pushing member, a first mounting seat, a second mounting seat and a locking member, the first tube member is connected to the first mounting seat, the third tube member is connected to the second mounting seat, the first mounting seat is pivotally connected to the second mounting seat, the locking member is movably arranged between the first mounting seat and the second mounting seat, the pushing member is located between the first mounting seat and the locking member, the pushing member is elastically abutted against the locking member, one end of the first traction member is connected to the pushing member, and when the first tube member and the fourth tube member are pivotally retracted, the pushing member pushes the locking member to move under the traction of the first traction member to release the pivotal connection of the first mounting seat relative to the second mounting seat.

9. The frame according to claim 8, characterized in that: The first mounting seat extends toward the pushing member to form a pushing protrusion, and the pushing member is provided with a matching pushing inclined surface corresponding to the pushing protrusion. One end of the first traction member is wrapped around the pushing member, and the pushing member rotates under the traction of the first traction member so that the pushing protrusion abuts against the matching pushing inclined surface. The pushing protrusion abuts against the matching pushing inclined surface so that the pushing member pushes the locking member to move.

10. The frame according to claim 9, characterized in that The push-matching inclined surface is a spiral inclined surface opened on the push member.

11. The frame according to claim 9, characterized in that: The pushing member is provided with a first spiral winding groove corresponding to the first traction member, and the first traction member is wound in the first winding groove.

12. The frame according to claim 8, characterized in that The first locking device also includes a first elastic member, which is arranged between the second mounting seat and the locking member. The first elastic member constantly biases the locking member onto the first mounting seat and causes the pushing member to elastically press against the locking member.

13. The frame according to claim 12, characterized in that: The locking member has an engaging tooth, the first mounting seat is provided with a first tooth cooperating with the engaging tooth, and the second mounting seat is provided with a second tooth cooperating with the engaging tooth. Under the pressure of the first elastic member, the engaging tooth engages with the first tooth and the second tooth at the same time to form a locking shape. Under the pressure of the pushing member, the engaging tooth overcomes the elastic force of the first elastic member and withdraws from the first tooth to release the lock.

14. The frame according to claim 8, characterized in that: The locking member moves along a pivot axis between the first mounting seat and the second mounting seat.

15. The frame according to claim 8, characterized in that The pushing member moves along a pivot axis between the first mounting seat and the second mounting seat.

16. The frame according to claim 8, characterized in that The first locking device also includes a driving member, which is inserted into the first tube and the fourth tube, and is engaged with the fourth tube. The other end of the first traction member is wrapped around the driving member, and the driving member rotates and pulls the first traction member by pivoting and retracting the first tube and the fourth tube.

17. The frame according to claim 16, characterized in that The driving member is provided with a second winding groove corresponding to the first traction member, and the first traction member is wound around the second winding groove.

18. The frame according to claim 16, characterized in that It also includes a folding structure for locking the folded state between the first tube and the fourth tube.

19. The frame according to claim 18, characterized in that The folding structure is a torsion spring, one end of which is mounted on the driving member, and the other end of which has a snap buckle. The first tube extends outward to form a fixed ring that cooperates with the snap buckle. When the fourth tube is folded into the first tube, the snap buckle is driven by the driving member to snap into the fixed ring.

20. The frame of claim 19, wherein: The driving member is provided with an insertion groove corresponding to the torsion spring.

21. The frame according to claim 7, characterized in that: It also includes a second locking device, which is used to lock the pivoting between the first pipe member and the fourth pipe member, and the second locking device is arranged between the first pipe member and the fourth pipe member.

22. The frame according to claim 21, characterized in that The second locking device includes a second traction member, a clamping member, a matching member, a first fixing member, a second fixing member and an operating member. The first tube member is connected to the first fixing member, the fourth tube member is connected to the second fixing member, the first fixing member and the second fixing member are sleeved with each other, the first fixing member and the second fixing member are pivotally connected, the matching member is fixed to the first fixing member, the clamping member is slidably provided on the second fixing member, the clamping member is clamped with the matching member to lock the first tube member and the fourth tube member in the expanded state, one end of the second traction member is connected to the operating member, and the other end of the second traction member is connected to the clamping member, and the operating member is operated so that the clamping member is unblocked from the matching member under the traction of the second traction member.

23. The frame of claim 22, wherein: The second locking device further comprises a second elastic member, and the second elastic member constantly provides an elastic force for engaging the engaging member with the matching member.

24. The frame of claim 22, wherein: The engaging member extends toward the matching member to form a clamping column, and the matching member is provided with a clamping structure corresponding to the clamping column.

25. The frame of claim 7, wherein: The first tube and the fourth tube can form an anti-falling support foot structure after being pivotally folded.

26. The frame according to claim 1, further comprising a fourth tube, the fourth tube being pivotally connected to the first tube, the first tube and the fourth tube being pivotally retracted relative to each other, characterized in that: The frame also includes a folding structure for locking the folded state between the first tube and the fourth tube; wherein the folding structure is a torsion spring, one end of the torsion spring is installed on the driving member at the fourth tube, the other end of the torsion spring has a snap buckle, the first tube extends outward to form a fixing ring that cooperates with the snap buckle, and when the fourth tube is folded into the first tube, the snap buckle is engaged with the fixing ring under the drive of the driving member.

27. The frame of claim 26, wherein: The driving member is provided with an insertion groove corresponding to the torsion spring.

28. The frame of claim 26, wherein: The first tube and the fourth tube can form an anti-falling support foot structure after being pivotally folded.

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