Child frame

Abstract

The invention discloses a baby carriage which can be switched between an unfolding position and a folding position and comprises an unfolding and folding device, a front foot stool, a rear foot stool, a front bearing side frame and a rear bearing side frame. The front foot stand is pivoted to the unfolding and folding device; the rear foot stand is pivoted to the unfolding and folding device, and the rear foot stand and the front foot stand do unfolding or folding movement through the unfolding and folding device; the front bearing side frame is pivoted to the unfolding and folding device; the rear bearing side frame is pivoted to the unfolding and folding device, and the rear bearing side frame and the front bearing side frame do unfolding or folding movement through the unfolding and folding device; in the process that the child frame is switched from the unfolding position to the folding position, the front bearing side frame and the rear bearing side frame are close to each other and are folded in a pivoted mode while the front foot frame and the rear foot frame are close to each other and are folded in a pivoted mode, and therefore folding of the child frame is achieved, the occupied space is small after the child frame is folded, and folding operation is convenient.

Description

[0001] This application is a divisional application of the invention patent application of Mingmen Switzerland Co., Ltd. (application date is November 9, 2020, application number is 202011244367.X, and invention name is "Children's Frame"). Technical Field

[0002] The invention relates to a children's bicycle, and in particular to a children's bicycle frame which occupies a small space after being folded and is easy to fold. Background Art

[0003] With the continuous progress of society, the continuous development of economy, and the continuous improvement of science and technology, people are provided with more and more abundant consumer goods, thus creating extremely excellent material conditions for improving people's living standards, and children's cars are one of the many consumer goods.

[0004] As we all know, there are many styles of baby strollers on the market, such as child strollers. Parents with children usually use child strollers instead of carrying their children when they go shopping or walking, so as to reduce the burden of adults, thus providing great convenience for parents with children. Therefore, child strollers are becoming more and more popular.

[0005] At present, when the baby stroller is not in use, it is necessary to store the baby stroller. However, the existing baby stroller takes up a large space after being folded due to its unreasonable frame design, and the folding operation of the frame is also inconvenient.

[0006] Therefore, there is an urgent need for a children's bicycle frame that occupies a small space after folding and is easy to fold and operate to overcome the above-mentioned defects. Summary of the invention

[0007] The object of the present invention is to provide a child bicycle frame which occupies a small space after being folded and is easy to fold.

[0008] In order to achieve the above-mentioned purpose, the present invention provides a child carriage frame, which can be switched between an extended position and a folded position, and includes an extension and folding device, a front tripod, a rear tripod, a front load-bearing side frame and a rear load-bearing side frame; the front tripod is pivotally connected to the extension and folding device; the rear tripod is pivotally connected to the extension and folding device, and the rear tripod is extended or folded with the front tripod by means of the extension and folding device; the front load-bearing side frame is pivotally connected to the extension and folding device; the rear load-bearing side frame is pivotally connected to the extension and folding device, and the rear load-bearing side frame is extended or folded with the front load-bearing side frame by means of the extension and folding device; wherein, in the process of the child carriage frame switching from the extended position to the folded position, the front tripod and the rear tripod are pivoted and folded close to each other, and the front load-bearing side frame and the rear load-bearing side frame are pivoted and folded close to each other, thereby realizing the folding of the child carriage frame.

[0009] Preferably, the front load-bearing side frame is connected to the front foot frame, and the rear load-bearing side frame is connected to the rear foot frame.

[0010] Preferably, the front load-bearing side frame is pivotally connected to the front leg frame, and the rear load-bearing side frame is pivotally connected to the rear leg frame; when the front leg frame and the rear leg frame are pivotally folded toward each other, the front load-bearing side frame and the rear load-bearing side frame are linked to pivotally fold toward each other.

[0011] Preferably, the front tripod and the rear tripod are linked to pivotally and fold downwardly towards each other during the process of pivoting and folding toward each other upward; or, the front tripod and the rear tripod are linked to pivotally and fold upwardly towards each other during the process of pivoting and folding toward each other downward.

[0012] Preferably, the front load-bearing side frame is located on the inner side of the front foot frame, and the rear load-bearing side frame is located on the inner side of the rear foot frame.

[0013] Preferably, the unfolding and retracting device includes a device frame and a movable seat; the device frame is pivotally connected to the front tripod and the rear tripod respectively; the movable seat is slidably arranged on the device frame, and the movable seat is pivotally connected to the front load-bearing side frame and the rear load-bearing side frame respectively; when the front tripod and the rear tripod are pivotally retracted towards each other, they also link the front load-bearing side frame and the rear load-bearing side frame to slide along with the movable seat.

[0014] Preferably, the device frame comprises a base pivotally connected to the front leg frame and the rear leg frame respectively, and an intermediate connecting frame with a top end assembled to the base, and the movable seat can be slidably disposed on the intermediate connecting frame along the up-down direction.

[0015] Preferably, the stowage device further comprises a locking member, which is movably disposed on one of the device frame and the movable seat, and the other of the device frame and the movable seat is provided with a slot structure for cooperating with the locking member, and the locking member can be switched between a locking position locked with the slot structure and a releasing position disengaged from the slot structure.

[0016] Preferably, the locking member is located on the base, and a through hole is provided on the intermediate connecting frame for the locking member to movably pass through and then be locked with the slot structure.

[0017] Preferably, the locking member is axially slidable in the through hole.

[0018] Preferably, the stowage device further comprises an operating member, which is movably disposed on a device frame or a movable seat where the locking member is located, and is used to drive the locking member to move to a release position.

[0019] Preferably, the operating member is provided with a driving inclined surface inclined relative to the axial direction, and the locking member is provided with a driven inclined surface cooperating with the driving inclined surface. During the movement of the operating member, the driving inclined surface and the driven inclined surface cooperate to drive the locking member to move to the unlocking position.

[0020] Preferably, the operating member is a button, and the button can slide in up and down directions.

[0021] Preferably, the stowage device further comprises an elastic element, and the elastic element is used to drive the locking member to move the locking member to a locking position.

[0022] Preferably, the elastic element is a spring, and the spring is arranged between the locking member and the device frame or the movable seat where the locking member is located.

[0023] Preferably, the child stroller frame further comprises a front canopy frame and a rear canopy frame; the front canopy frame is pivotally connected to the front leg frame, and the rear canopy frame is pivotally connected to the rear leg frame; when the child stroller frame is switched from the unfolded position to the folded position, the front canopy frame pivots forward and downward to abut against the front leg frame, and the rear canopy frame pivots backward and downward to abut against the rear leg frame.

[0024] Preferably, the child vehicle frame further comprises a dining tray, which is detachably mounted on the device frame.

[0025] Preferably, elastic locking fingers are formed on the dinner plate, and the dinner plate is locked to the device frame by the elastic locking fingers.

[0026] Preferably, the elastic engaging finger extends downward and bulges.

[0027] Preferably, the child bicycle frame further comprises a front wheel arranged at the bottom of the front leg frame and a rear wheel arranged at the bottom of the rear leg frame, and the front wheel and the rear wheel abut against each other when the child bicycle frame is in the folded position.

[0028] Preferably, the child bicycle frame also includes a rider, which is pivotally connected to the front leg frame. The rider can switch between a push position and a tow position. When the rider pivots to the push position, it is on the same side as the rear leg frame, and when the rider pivots to the tow position, it is on the same side as the front leg frame.

[0029] Preferably, the rider is located outside of both the front and rear kickstands.

[0030] Preferably, the child bicycle frame also includes a rider, which includes a sleeve mounted on the front leg frame and a handle inserted in the sleeve; when the child bicycle frame is in the folded position, the bottom end of the handle passes downward through the sleeve and extends to the front of the front wheel, so that the child bicycle frame stands on the ground by means of the bottom end of the handle, the front wheel and the rear wheel.

[0031] Preferably, the sleeve is pivotally connected to the front tripod, and the rider can switch between a push position and a tow position, the rider is on the same side as the rear tripod when pivoting to the push position, and on the same side as the front tripod when pivoting to the tow position.

[0032] Preferably, the sleeve is located outside the front leg frame.

[0033] Preferably, a rider locking piece is provided between the sleeve and the front tripod, and the rider locking piece locks the rider and the front tripod when the rider pivots to the rearward push position.

[0034] Preferably, the rider's hand lock piece is rotatably mounted on one of the sleeve and the front foot frame, and the other of the sleeve and the front foot frame is provided with a locking structure that cooperates with the rider's hand lock piece.

[0035] Preferably, the child bicycle frame further comprises a locking elastic member assembled on the sleeve or the front leg frame where the hand locking member is located, and the locking elastic member is used to drive the hand locking member to move in a direction to be locked with the matching locking structure.

[0036] Preferably, the bottom end of the sleeve is pivotally connected to the front leg frame, and the locking structure is located at the top end of the sleeve.

[0037] Preferably, the front leg frame, the rear leg frame, the base and the movable seat are arranged separately on the left and the right.

[0038] Preferably, the front load-bearing side frame, the rear load-bearing side frame and the middle connecting frame are each a "U"-shaped frame, the left and right sides of the rear end of the front load-bearing side frame are each pivotally connected to the movable seat on the same side, the left and right sides of the front end of the front load-bearing side frame are each pivotally connected to the front leg frame on the same side, the left and right sides of the front end of the rear load-bearing side frame are each pivotally connected to the movable seat on the same side, the left and right sides of the rear end of the rear load-bearing side frame are each pivotally connected to the rear leg frame on the same side, the left and right sides of the rear end of the front leg frame are each pivotally connected to the base on the same side, the left and right ends of the front end of the rear leg frame are each pivotally connected to the base on the same side, and the left and right sides of the top end of the middle connecting frame are each assembled and connected to the base on the same side.

[0039] To achieve the above-mentioned purpose, the child stroller frame of the present invention can be switched between an unfolded position and a folded position, and includes an unfolding and folding device, a front leg frame, a rear leg frame, a front load-bearing side frame, and a rear load-bearing side frame. The unfolding and retracting device comprises a device frame and a movable seat which can be detachably connected to the device frame, the movable seat being engaged with the device frame when the child stroller frame is in the unfolded position, and being detached from the device frame when the child stroller frame is in the folded position; the front tripod is pivotally connected to the device frame; the rear tripod is pivotally connected to the device frame, and the rear tripod is unfolded or folded with the front tripod by means of the unfolding and retracting device; the front load-bearing side frame is pivotally connected to the movable seat, and the front load-bearing side frame is also pivotally connected to the front tripod; the rear load-bearing side frame is pivotally connected to the movable seat, and the rear load-bearing side frame is also pivotally connected to the rear tripod, and the rear load-bearing side frame is unfolded or folded with the front load-bearing side frame by means of the unfolding and retracting device; wherein, in the process of the front tripod and the rear tripod being pivoted and retracted toward each other, the front load-bearing side frame and the rear load-bearing side frame are linked to follow the separation of the movable seat relative to the device frame and are pivoted and retracted toward each other, thereby realizing the folding of the child stroller frame.

[0040] Compared with the prior art, since the front tripod is pivotally connected to the unfolding and retracting device, the rear tripod is pivotally connected to the unfolding and retracting device, and the rear tripod is unfolded or retracted with the front tripod by means of the unfolding and retracting device; at the same time, since the front load-bearing side frame is pivotally connected to the unfolding and retracting device, the rear load-bearing side frame is unfolded or retracted with the front load-bearing side frame by means of the unfolding and retracting device; therefore, in the process of switching the child stroller frame from the unfolded position to the retracted position, the front tripod and the rear tripod are pivotally retracted close to each other, while the front load-bearing side frame and the rear load-bearing side frame are pivotally retracted close to each other, which, on the one hand, makes the front tripod, the rear tripod, the front load-bearing side frame and the rear load-bearing side frame compact after being retracted, thereby making the child stroller frame of the present invention occupy a smaller space, and on the other hand, makes the folding operation of the child stroller frame of the present invention convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the three-dimensional structure of the child bicycle frame according to the first embodiment of the present invention when it is in the unfolded position.

[0042] Figure 2 for Figure 1 The schematic diagram of the plan structure of the child bicycle frame shown is viewed from the front to the back.

[0043] Figure 3 for Figure 1 The illustrated diagram is a three-dimensional structural diagram of the child stroller frame after the top frame is pivoted downward and folded.

[0044] Figure 4 for Figure 3 The three-dimensional structure diagram of the child bicycle frame shown is after the rider folds it downwards.

[0045] Figure 5 for Figure 1 The three-dimensional structural schematic diagram of the child bicycle frame when it is in the folded position is shown.

[0046] Figure 6 for Figure 1 The three-dimensional structure diagram of the child bicycle frame shown is when the rider is in the forward towing position.

[0047] Figure 7 It is a schematic diagram of the three-dimensional structure of the unfolding and retracting device in the child bicycle frame according to the first embodiment of the present invention.

[0048] Figure 8 for Figure 7 A three-dimensional exploded schematic diagram of part of the structure of the stowage device shown.

[0049] Fig. 9 It is a schematic diagram of the internal structure of a child bicycle frame according to the first embodiment of the present invention after being cut away at the position where the dining tray is engaged with the base of the unfolding and retracting device.

[0050] Fig.10It is a schematic diagram of the three-dimensional structure of a dining tray in a child bicycle frame according to the first embodiment of the present invention.

[0051] Fig.11 It is a schematic diagram of the internal structure of the child bicycle frame of the first embodiment of the present invention when the rider and the front leg frame are mutually engaged by the rider fixing member and the locking structure.

[0052] Fig.12 FIG. 1 is a schematic plan view of the structure of a child bicycle frame according to a second embodiment of the present invention when the child bicycle frame is in an unfolded position.

[0053] Fig.13 for Fig.12 The three-dimensional structural schematic diagram of the child bicycle frame when it is in the folded position is shown. DETAILED DESCRIPTION

[0054] In order to explain the technical content and structural features of the present invention in detail, further description will be given below in combination with the implementation modes and the accompanying drawings.

[0055] See also Figure 1 and Figure 5 The child bicycle frame 1 according to the first embodiment of the present invention can be used as follows: Figure 1 The expanded position shown and Figure 5 The front leg 20a, the rear leg 20b, the front side frame 30a and the rear side frame 30b are pivotally connected to the stowage device 10, and the rear leg 20b is pivotally connected to the stowage device 10, so that the rear leg 20b can be extended or retracted by the stowage device 10 and the front leg 20a. Figure 6 In the embodiment, the front leg frame 20a is pivotally connected to the stowing device 10 to form a first pivot point 21, and the rear leg frame 20b is pivotally connected to the stowing device 10 to form a second pivot point 22. Preferably, the first pivot point 21 is located directly in front of the second pivot point 22, so that the first pivot point 21 and the second pivot point 22 do not overlap, but the present invention is not limited thereto. The front load-bearing side frame 30a is pivotally connected to the stowing device 10, and the rear load-bearing side frame 30b is pivotally connected to the stowing device 10, so that the rear load-bearing side frame 30b can be extended or retracted with the front load-bearing side frame 30a by the stowing device 10. Preferably, in Figure 6 In the embodiment, the front load-bearing side frame 30a is pivotally connected with the stowing device 10 to form a third pivot point 31; the rear load-bearing side frame 30b is pivotally connected with the stowing device 10 to form a fourth pivot point 32, and the third pivot point 31 is located directly in front of the fourth pivot point 32, so that the third pivot point 31 and the fourth pivot point 32 do not overlap, but the present invention is not limited thereto. Figure 1 Switch the expanded position shown to Figure 5During the process of being in the folded position shown in the figure, the front leg frame 20a and the rear leg frame 20b are pivotally folded downwardly towards each other, while the front load-bearing side frame 30a and the rear load-bearing side frame 30b are pivotally folded upwardly towards each other, thereby achieving the folding of the child carriage frame 1 of the first embodiment of the present invention; of course, in other embodiments, the front leg frame 20a and the rear leg frame 20b may also be pivotally folded upwardly towards each other, while the front load-bearing side frame 30a and the rear load-bearing side frame 30b are pivotally folded downwardly towards each other, thereby achieving the folding of the child carriage frame 1 of the first embodiment of the present invention, and the present invention is not limited thereto. Specifically, in order to achieve the purpose of "the front leg 20a and the rear leg 20b are pivoted and retracted close to each other, and the front load-bearing side frame 30a and the rear load-bearing side frame 30b are pivoted and retracted close to each other", the front load-bearing side frame 30a is connected to the front leg 20a, and the rear load-bearing side frame 30b is connected to the rear leg 20b. Preferably, the front load-bearing side frame 30a is also pivotally connected to the front leg 20a, and the rear load-bearing side frame 30b is also pivotally connected to the rear leg 20b, so that the front leg 20a and the rear leg 20b are pivotally connected to each other. In the process of pivoting and folding downward, the front load-bearing side frame 30a and the rear load-bearing side frame 30b are linked to each other to pivot and fold upward; of course, in other embodiments, the front leg frame 20a and the rear leg frame 20b can be linked to the front load-bearing side frame 30a and the rear load-bearing side frame 30b to pivot and fold downward when they are pivoted and folded upward, so it is not limited to this; since the front load-bearing side frame 30a is also pivotally connected to the front leg frame 20a, and the rear load-bearing side frame 30b is also pivotally connected to the rear leg frame 20b, Figure 6 In the embodiment, the front load-bearing side frame 30a is pivotally connected to the front leg frame 20a to form a fifth pivot point 33, and the rear load-bearing side frame 30b is pivotally connected to the rear leg frame 20b to form a sixth pivot point 34, so that the third pivot point 31 and the fourth pivot point 32 are respectively located between the fifth pivot point 33 and the sixth pivot point 34 in the front-to-back direction of the child frame 1 of the first embodiment of the present invention, but not limited thereto; preferably, the front load-bearing side frame 30a is located on the inner side of the front leg frame 20a, and the rear load-bearing side frame 30b is located on the inner side of the rear leg frame 20b. , so that the front load-bearing side frame 30a and the rear load-bearing side frame 30b can carry the child carrier, and the front load-bearing side frame 30a extends forward from the front leg frame 20a, and the rear load-bearing side frame 30b extends backward from the rear leg frame 20b, so that the front load-bearing side frame 30a and the rear load-bearing side frame 30b can carry the child carrier (for example, but not limited to a sleeping box) more conveniently. It should be noted that extending forward means extending from the front of the child frame 1 of the first embodiment of the present invention, and extending backward means extending from the rear of the child frame 1 of the first embodiment of the present invention. More specifically, as follows:

[0056] like Figures 1 to 6As shown in FIG. 1 , the child stroller frame 1 of the first embodiment of the present invention further comprises a front canopy frame 40a, a rear canopy frame 40b, a dining tray 50, a front wheel 60a, a rear wheel 60b and a rider 70. The front canopy frame 40a is pivotally connected to the front leg frame 20a, and the rear canopy frame 40b is pivotally connected to the rear leg frame 20b. Therefore, the child stroller frame 1 of the first embodiment of the present invention is composed of the following components: Figure 1 The expanded position shown is switched to Figure 5 During the folding process shown in FIG. 1 , the front canopy frame 40a pivots forward and downward to abut against the front leg frame 20a, and the rear canopy frame 40b pivots backward and downward to abut against the rear leg frame 20b, thereby making the folded child stroller frame 1 more compact. Figure 5 The front wheel 60a is disposed at the bottom of the front leg frame 20a, and the rear wheel 60b is disposed at the bottom of the rear leg frame 20b, so that the child frame 1 of the first embodiment of the present invention can stand on the ground by the front wheel 60a and the rear wheel 60b when it is in the unfolded position, and the front wheel 60a and the rear wheel 60b abut against each other when the child frame 1 of the first embodiment of the present invention is in the folded position. Figure 5 The dining tray 50 is detachably mounted on the device frame 11 described below, so as to facilitate the assembly and disassembly operations between the dining tray 50 and the device frame 11; Fig. 9 and Fig.10 In the embodiment, the tray 50 is formed with an elastic snap-fit ​​finger 51. Preferably, the elastic snap-fit ​​finger 51 extends downward and protrudes, so that the tray 50 is snapped to the device frame 11 by the elastic snap-fit ​​finger 51, so as to simplify the detachable structure of the tray 50 and the device frame 11 and facilitate the assembly and disassembly operation of the tray 50, but the present invention is not limited thereto. The handlebar 70 includes a sleeve 71 mounted on the front leg frame 20a and a handlebar 72 inserted in the sleeve 71; the bottom end of the handlebar 72 is in the position of the child frame 1 of the first embodiment of the present invention as shown in FIG. Figure 5 In the folded position shown, the sleeve 71 passes downward and extends to the front of the front wheel 60a, so that the child frame 1 when switched to the folded position stands on the ground by the bottom end of the handlebar 72, the front wheel 60a and the rear wheel 60b, thereby making it easier to carry the folded child frame 1. Of course, according to actual needs, the sleeve 71 and the handlebar 72 can be made into an integrated structure, and the rider 70 is pivotally connected to the front leg frame 20a at this time. Preferably, the bottom end of the rider 70 is pivotally connected to the front leg frame 20a, so that the rider 70 can be used as shown in the figure. Figure 1 The pushback position shown and Figure 6 when the rider 70 is pivoted to the push position with the rear foot frame 20b on the same side, when the rider 70 is pivoted to the front drag position with the front foot frame 20a on the same side, so that the user in the rider 70 is located as Figure 1 The push-back position shown in FIG. 1 is a push operation of the child carriage frame 1 according to the first embodiment of the present invention and the rider 70 is located in the position shown in FIG. Figure 6The front towing position shown is a towing operation of the child carriage 1 according to the first embodiment of the present invention; preferably, when the sleeve 71 and the handlebar 72 are made into an integrated structure, the rider 70 is located outside the front leg 20a and the rear leg 20b, which makes it easier for the rider 70 to switch between the rear pushing position and the front towing position.

[0057] like Figures 7 to 9 As shown, the stowage device 10 includes a device frame 11, a movable seat 12, a locking member 13, an operating member 14 and an elastic element 15. Figures 1 to 6 The device frame 11 is pivotally connected to the front leg frame 20a and the rear leg frame 20b respectively, and the movable seat 12 is slidably arranged on the device frame 11. The movable seat 12 is pivotally connected to the front load-bearing side frame 30a and the rear load-bearing side frame 30b respectively, so that the front leg frame 20a and the rear leg frame 20b are also linked to the front load-bearing side frame 30a and the rear load-bearing side frame 30b to slide downward together with the movable seat 12 during the process of pivoting and retracting downwardly toward each other. Of course, according to actual needs, the front leg frame 20a and the rear leg frame 20b can be pivotally connected to each other downwardly toward each other. During the folding process, the front load-bearing side frame 30a and the rear load-bearing side frame 30b are also linked to slide upward along with the movable seat 12. Therefore, when the front leg frame 20a and the rear leg frame 20b are pivoted and folded close to each other, the front load-bearing side frame 30a and the rear load-bearing side frame 30b are also linked to slide along with the movable seat 12. This makes the front leg frame 20a, the rear leg frame 20b, the front load-bearing side frame 30a and the rear load-bearing side frame 30b more compact after folding, and improves the smoothness of their folding. Fig. 9 As shown, the locking member 13 is movably arranged on the device frame 11, and the movable seat 12 is provided with a slot structure 121 for cooperating with the locking member 13, so that the locking member 13 can be switched between a locking position locked with the slot structure 121 and a releasing position disengaged from the slot structure 121, so as to block or disengage from blocking the sliding of the movable seat 12 relative to the device frame 11; of course, according to actual needs, the locking member 13 can be movably arranged on the movable seat 12, and correspondingly, the device frame 11 is provided with a slot structure 121 for cooperating with the locking member 13, so it is not limited to this. The operating member 14 is movably arranged on the device frame 11 where the locking member 13 is located, and the operating member 14 is used to drive the locking member 13 to move to the releasing position, and the operating member 14 drives the locking member 13 to perform the releasing movement. The elastic element 15 is used to drive the locking member 13 so that the locking member 13 moves to the position as shown in the figure. Fig. 9 It is understood that when the locking member 13 is located on the movable seat 12, the operating member 14 is also located on the movable seat 12, so it is not limited to the above. More specifically, as follows:

[0058] like Figures 1 to 6As shown, the device frame 11 includes a base 111 and an intermediate connecting frame 112 assembled on the top of the base 111. The base 111 is pivotally connected to the front leg 20a and the rear leg 20b respectively. The movable seat 12 can be slidably arranged on the intermediate connecting frame 112 in the up-down direction, so as to support the child carrier from the bottom by means of the intermediate connecting frame 112, and provide a guide for the upward and downward sliding of the movable seat 12 to ensure the smoothness of the upward and downward sliding of the movable seat 12. It can be understood that when the device frame 11 includes the base 111 and the intermediate connecting frame 112, the first pivot point 21 at this time is formed by the pivot connection of the front leg 20a and the base 111, and the second pivot point 22 is formed by the pivot connection of the rear leg 20b and the base 111.

[0059] like Figures 8 to 9 As shown, the locking member 13 is located on the base 111, and a through hole 113 is provided on the intermediate connecting frame 112 for the locking member 13 to movably pass through and then lock with the slot structure 121. This design can increase the locking reliability between the locking member 13 and the movable seat 12. Specifically, the locking member 13 can slide axially in the through hole 113, so that the locking member 13 can lock the intermediate connecting frame 112 and the movable seat 12 more directly and reliably, but the present invention is not limited thereto.

[0060] like Figures 8 to 9 As shown, the operating member 14 is provided with a driving inclined surface 141 inclined relative to the axial direction, and the locking member 13 is provided with a driven inclined surface 131 cooperating with the driving inclined surface 141, so that the operating member 14 drives the locking member 13 to move to the unlocking position through the cooperation between the driving inclined surface 141 and the driven inclined surface 131 during the movement. For example, the operating member 16 is a button that can slide in the up and down directions, which makes it easier for the user to release the operating member 16 by pressing.

[0061] like Figures 8 to 9 As shown, the elastic element 15 is a spring, which is disposed between the locking member 13 and the device frame 11 to simplify the assembly connection between the elastic element 15 and the locking member 13 and the device frame 11. It is understandable that when the locking member 13 is movably disposed on the movable seat 12, the spring is then disposed between the locking member 13 and the movable seat 12, so it is not limited thereto.

[0062] like Figures 1 to 6 As shown, the sleeve 71 is pivotally connected to the front leg frame 20a, so that the rider 70 can Figure 1 The pushback position shown and Figure 6 The front towing position shown in the figure is switched between the same side as the rear foot frame 20b when the rider 70 is pivoted to the rear push position and the same side as the front foot frame 20a when the rider 70 is pivoted to the front towing position, so that the user can easily adjust the position of the rider 70 when the rider 70 is in the position as shown in the figure. Figure 1 The push-back position shown in FIG. 1 is a push operation of the child carriage frame 1 according to the first embodiment of the present invention and the rider 70 is located in the position shown in FIG. Figure 6 The front towing position shown is a towing operation of the child bicycle frame 1 of the first embodiment of the present invention; preferably, the sleeve 71 is located outside the front leg frame 20a, which makes it easier for the rider 70 to switch between the rear push position and the front towing position. Fig.11 A rider lock 80a is provided between the sleeve 71 and the front leg frame 20a so that the rider lock 80a can be pivoted to the position as shown in FIG. Figure 6 In the push-back position shown, the rider 70 and the front foot frame 20a are locked to improve the safety of use. More specifically, the rider locking piece 80a is rotatably mounted on the front foot frame 20a, and the sleeve 71 is provided with a matching locking structure 90 that cooperates with the rider locking piece 80a. Of course, according to actual needs, the rider locking piece 80a can be rotatably mounted on the sleeve 71, and correspondingly, the matching locking structure 90 is provided on the front foot frame 20a. In order to prevent the rider 70 in the push-back position from accidentally pivoting, Fig.11 In the embodiment of the child stroller frame 1 of the first embodiment of the present invention, the child stroller frame 1 further comprises a locking elastic member 80b, which is used to drive the rider's hand locking member 80a to move in the direction of locking with the matching locking structure 90, so that the automatic locking of the rider's hand locking member 80a and the matching locking structure 90 is more convenient; specifically, the locking elastic member 80b is arranged between the rider's hand locking member 80a and the front foot frame 20a where the rider's hand locking member 80a is located; for example, the locking elastic member 80b is a torsion spring, which is sleeved on the pivot structure 81 of the rider's hand locking member 80a for pivoting with the front foot frame 20a, and one end 82 of the torsion spring abuts against the rider's hand locking member 80a, and the other end 83 abuts against the front foot frame 20a, so that the assembly connection between the locking elastic member 80b and the rider's hand locking member 80a and the front foot frame 20a is more reasonable and compact, and the automatic pivoting of the rider's hand locking member 80a is smoother, but the invention is not limited thereto. In addition, the bottom end of the sleeve 71 is pivotally connected to the front leg frame 20a, and the locking structure 90 is located at the top end of the sleeve 71, so that the rider locking member 80a can be easily locked when the rider 70 is pivoted to the position as shown in FIG. Figure 6 In the rearward position shown, the rider 70 and the front leg frame 20a are locked; for example, the rider locking member 80a is a hook structure, and correspondingly, the matching locking structure 90 is a slot structure, but it is not limited thereto. It is understandable that when the rider locking member 80a is assembled on the sleeve 71, correspondingly, the locking elastic member 80b is disposed between the sleeve 71 and the rider locking member 80a.

[0063] like Figures 1 to 6As shown, the front leg frame 20a, the rear leg frame 20b, the base 111 and the movable seat 12 are respectively arranged to be separated from each other on the left and the right to ensure the reliability of the child frame 1 of the first embodiment of the present invention in standing and folding; the front load-bearing side frame 30a, the rear load-bearing side frame 30b and the intermediate connecting frame 112 are respectively "U"-shaped frames, so that the front load-bearing side frame 30a, the rear load-bearing side frame 30b and the intermediate connecting frame 112 can carry the child carrier. Of course, according to actual needs, the front load-bearing side frame 30a, the rear load-bearing side frame 30b and the intermediate connecting frame 112 can also have other shapes, so it is not limited to this; the left and right sides of the rear end of the front load-bearing side frame 30a are respectively pivotally connected to the movable seat 12 on the same side, and the left and right sides of the front end of the front load-bearing side frame 30a are respectively pivotally connected to the front leg frame 20a on the same side; the front end of the rear load-bearing side frame 30b The left and right sides are respectively pivotally connected to the movable seat 12 on the same side, and the left and right sides of the rear end of the rear load-bearing side frame 30b are respectively pivotally connected to the rear leg frame 20b on the same side; the front leg frames 20a on the left and right sides are respectively pivotally connected to the base 111 on the same side, and the rear leg frames 20b on the left and right sides are respectively pivotally connected to the base 111 on the same side; the left and right sides of the top end of the intermediate connecting frame 112 are respectively assembled and connected to the base 111 on the same side; such a design can more reliably ensure that the front leg frame 20a and the rear leg frame 20b are correspondingly linked to the front load-bearing side frame 30a and the rear load-bearing side frame 30b when the front leg frame 20a and the rear leg frame 20b are close to each other and folded, and the front load-bearing side frame 30a and the rear load-bearing side frame 30b also follow the movable seat 12 to slide on the intermediate connecting frame 112 during the folding process, thereby ensuring the folding reliability of the child frame 1 of the first embodiment of the present invention.

[0064] In conjunction with the accompanying drawings, the folding process of the child bicycle frame of the first embodiment of the present invention is described as follows: Figure 1 The child frame 1 in the unfolded position shown is folded into Figure 5 When the folded position is shown, the front canopy frame 40a is first folded forward and downward to abut against the front leg frame 20a, and the rear canopy frame 40b is folded backward and downward to abut against the rear leg frame 20b. Figure 3 Next, the rider 70 is unlocked, and the handlebar 72 in the rider 70 is retracted into the sleeve 71, so that the bottom end of the handlebar 72 in the rider 70 passes through the sleeve 71 and extends to the front of the front wheel 60a, and the state is shown Figure 4As shown; then, the left and right hands apply an upward operating force F to the corresponding operating members 14, and the operating member 14 drives the locking member 13 to slide out of the slot structure 121 of the movable seat 12 through the cooperation of the driving inclined surface 141 and the driven inclined surface 131, thereby allowing the movable seat 12 to slide up and down on the intermediate connecting frame 112; then, the front tripod 20a and the rear tripod 20b are moved downward to close to each other and folded, and the front side support frame 30a and the rear side support frame 30b are linked to close to each other upward to close, and the front side support frame 30a and the rear side support frame 30b need to follow the movable seat 12 to slide down on the intermediate connecting frame 112 during the process of closing. The final closed state is shown in FIG. Figure 5 When you want to Figure 1 The rider 70 of the child bicycle frame 1 of the first embodiment of the present invention is switched from the rearward position to the Figure 5 When the front towing position is reached, the operator releases the lock of the rider 70 and the front leg frame 20a by the rider lock member 80a, and then pivots the rider 70 to the front leg frame 20a. Figure 5 The forward drag position shown is sufficient.

[0065] See also Fig.12 and Fig.13 The structure of the child bicycle frame 1' of the second embodiment of the present invention is basically the same as that of the child bicycle frame 1 of the first embodiment, and the difference lies in the device framework in the unfolding and retracting devices of the two, which is specifically described as follows:

[0066] (1) In the child carriage frame 1' of the second embodiment, the device frame 11' of the stowage device 10' is less provided with the intermediate connecting frame 112 than the device frame 11 of the stowage device 10 in the child carriage frame 1 of the first embodiment, that is, the device frame 11' does not include the intermediate connecting frame 112. In this case, the movable seat 12 in the stowage device 10' can be detachably connected relative to the device frame 11', so that the movable seat 12 of the stowage device 10' is engaged with the device frame 11' when the child carriage frame 1' is in the unfolded position. Fig.12As shown, the movable seat 12 is separated from the device frame 11' when the child carriage frame 1' is in the folded position. Therefore, the front leg frame 20a and the rear leg frame 20b are linked to the front load-bearing side frame 30a and the rear load-bearing side frame 30b in the process of pivoting and folding close to each other, following the separation of the movable seat 12 relative to the device frame 11' and pivoting and folding close to each other. In the first embodiment, since the movable seat 12 is slidably mounted on the device frame 11, specifically, slidably mounted on the middle connecting frame 112 of the device frame 11, the movable seat 12 slides toward the base 111 close to the device frame 11 when the child carriage frame 1 is in the unfolded position, and the movable seat 12 slides along the base 111 away from the device frame 11 when the child carriage frame 1 is in the folded position; therefore, the front leg frame 20a and the rear leg frame 20b are linked to the front load-bearing side frame 30a and the rear load-bearing side frame 30b in the process of pivoting and folding close to each other downward, and slide together with the movable seat 12.

[0067] Except for the above differences, the rest is the same as the first embodiment, so it will not be described again.

[0068] Compared with the prior art, the front leg frame 20a is pivotally connected to the stowing device 10, the rear leg frame 20b is pivotally connected to the stowing device 10, and the rear leg frame 20b is extended or retracted with the front leg frame 20a by the stowing device 10; at the same time, the front load-bearing side frame 30a is pivotally connected to the stowing device 10, the rear load-bearing side frame 30b is pivotally connected to the stowing device 10, and the rear load-bearing side frame 30b is extended or retracted with the front load-bearing side frame 30a by the stowing device 10; therefore, in the child bicycle frame 1 (1') of the present invention, Figure 1 Switch the expanded position shown to Figure 5 During the process of folding the front leg 20a and the rear leg 20b, the front side frame 30a and the rear side frame 30b are folded together and pivoted close to each other. This makes the front leg 20a, the rear leg 20b, the front side frame 30a and the rear side frame 30b compact after folding, thereby making the child frame 1 (1') of the present invention occupy a smaller space. On the other hand, it makes the folding operation of the child frame 1 (1') of the present invention convenient.

[0069] The above disclosure is only a preferred embodiment of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope of the present invention.

Claims

1. A child bicycle frame, which can be switched between an unfolded position and a folded position, characterized in that: include: Extension and retraction device; A front tripod, pivotally connected to the stowage device; A rear tripod is pivotally connected to the unfolding and retracting device, and the rear tripod is unfolded or retracted with the front tripod by the unfolding and retracting device; A front load-bearing side frame, pivotally connected to the stowage device; as well as The rear load-bearing side frame is pivotally connected to the unfolding and retracting device, and the rear load-bearing side frame and the front load-bearing side frame are unfolded or retracted with each other by the unfolding and retracting device; Wherein, when the child carriage frame is switched from the unfolded position to the folded position, the front leg frame and the rear leg frame are pivoted and folded close to each other, and the front load-bearing side frame and the rear load-bearing side frame are pivoted and folded close to each other, thereby realizing the folding of the child carriage frame. Wherein, the front load-bearing side frame is connected to the front foot frame, and the rear load-bearing side frame is connected to the rear foot frame.

2. The child bicycle frame according to claim 1, characterized in that: The front load-bearing side frame is pivotally connected to the front leg frame, and the rear load-bearing side frame is pivotally connected to the rear leg frame; when the front leg frame and the rear leg frame are pivotally folded toward each other, the front load-bearing side frame and the rear load-bearing side frame are linked to pivotally fold toward each other.

3. The child bicycle frame according to claim 2, characterized in that: The front tripod and the rear tripod are linked to pivotally retract toward each other upwards while they are being pivoted and retracted toward each other, and the front load-bearing side frame and the rear load-bearing side frame are linked to pivotally retract toward each other downwards; or, the front tripod and the rear tripod are linked to pivotally retract toward each other upwards while they are being pivoted and retracted toward each other downwards.

4. The child bicycle frame according to claim 1, characterized in that: The front load-bearing side frame is located on the inner side of the front foot frame, and the rear load-bearing side frame is located on the inner side of the rear foot frame.

5. The child bicycle frame according to claim 2, characterized in that: The stowage device comprises: A device frame, pivotally connected to the front leg frame and the rear leg frame respectively; and A movable seat is slidably mounted on the device frame, and the movable seat is pivotally connected to the front load-bearing side frame and the rear load-bearing side frame respectively; when the front leg frame and the rear leg frame are pivotally folded toward each other, the front load-bearing side frame and the rear load-bearing side frame are also linked to slide along with the movable seat.

6. The child bicycle frame according to claim 5, characterized in that: The device frame comprises a base pivotally connected to the front leg frame and the rear leg frame respectively and an intermediate connecting frame with a top end assembled to the base, and the movable seat can be slidably arranged on the intermediate connecting frame along the up-down direction.

7. The child bicycle frame according to claim 6, characterized in that: The unfolding and stowing device also includes a locking piece, which is movably disposed on one of the device frame and the movable seat, and the other of the device frame and the movable seat is provided with a slot structure for cooperating with the locking piece, and the locking piece can be switched between a locking position locked with the slot structure and a releasing position disengaged from the slot structure.

8. The child bicycle frame according to claim 7, characterized in that: The locking piece is located on the base, and the intermediate connecting frame is provided with a through hole for the locking piece to movably pass through and then be locked with the slot structure.

9. The child bicycle frame according to claim 8, characterized in that: The locking member is axially slidable in the through hole.

10. The child bicycle frame according to claim 7, characterized in that: The stowage device further comprises: The operating member is movably arranged on the device frame or the movable seat where the locking member is located, and the operating member is used to drive the locking member to move to the unlocking position.

11. The child bicycle frame according to claim 10, characterized in that: The operating member is provided with a driving inclined surface inclined relative to the axial direction, and the locking member is provided with a driven inclined surface cooperating with the driving inclined surface. During the movement of the operating member, the driving inclined surface and the driven inclined surface cooperate to drive the locking member to move to the unlocking position.

12. The child bicycle frame according to claim 11, characterized in that: The operating member is a button, and the button can slide in up and down directions.

13. The child bicycle frame according to claim 7, characterized in that: The stowage device further comprises: The elastic element is used to drive the locking member to move the locking member to the locking position.

14. The child bicycle frame according to claim 13, characterized in that: The elastic element is a spring, and the spring is arranged between the locking piece and the device frame or the movable seat where the locking piece is located.

15. The child bicycle frame according to claim 6, characterized in that: The front leg frame, the rear leg frame, the base and the movable seat are arranged separately on the left and the right.

16. The child bicycle frame according to claim 15, characterized in that: The front load-bearing side frame, the rear load-bearing side frame and the intermediate connecting frame are each a "U"-shaped frame, the left and right sides of the rear end of the front load-bearing side frame are each pivotally connected to the movable seat on the same side, the left and right sides of the front end of the front load-bearing side frame are each pivotally connected to the front leg frame on the same side, the left and right sides of the front end of the rear load-bearing side frame are each pivotally connected to the movable seat on the same side, the left and right sides of the rear end of the rear load-bearing side frame are each pivotally connected to the rear leg frame on the same side, the front leg frames on the left and right sides are each pivotally connected to the base on the same side, the rear leg frames on the left and right sides are each pivotally connected to the base on the same side, and the left and right sides of the top end of the intermediate connecting frame are each assembled and connected to the base on the same side.

17. A child bicycle frame, switchable between an extended position and a folded position, characterized in that: include: Extension and retraction device; A front tripod, pivotally connected to the stowage device; A rear tripod is pivotally connected to the unfolding and retracting device, and the rear tripod is unfolded or retracted with the front tripod by the unfolding and retracting device; A front load-bearing side frame, pivotally connected to the stowage device; as well as The rear load-bearing side frame is pivotally connected to the unfolding and retracting device, and the rear load-bearing side frame and the front load-bearing side frame are unfolded or retracted with each other by the unfolding and retracting device; Wherein, when the child carriage frame is switched from the unfolded position to the folded position, the front leg frame and the rear leg frame are pivoted and folded close to each other, and the front load-bearing side frame and the rear load-bearing side frame are pivoted and folded close to each other, thereby realizing the folding of the child carriage frame. The front load-bearing side frame is connected to the front foot frame, and the rear load-bearing side frame is connected to the rear foot frame. The child stroller frame also includes a front canopy frame and a rear canopy frame; the front canopy frame is pivotally connected to the front leg frame, and the rear canopy frame is pivotally connected to the rear leg frame; during the process of the child stroller frame switching from the unfolded position to the folded position, the front canopy frame pivots forward and downward to a position against the front leg frame, and the rear canopy frame pivots backward and downward to a position against the rear leg frame.

18. A child bicycle frame, switchable between an extended position and a folded position, characterized in that: include: Extension and retraction device; A front tripod, pivotally connected to the stowage device; A rear tripod is pivotally connected to the unfolding and retracting device, and the rear tripod is unfolded or retracted with the front tripod by the unfolding and retracting device; A front load-bearing side frame, pivotally connected to the stowage device; as well as The rear load-bearing side frame is pivotally connected to the unfolding and retracting device, and the rear load-bearing side frame and the front load-bearing side frame are unfolded or retracted with each other by the unfolding and retracting device; Wherein, when the child carriage frame is switched from the unfolded position to the folded position, the front leg frame and the rear leg frame are pivoted and folded close to each other, and the front load-bearing side frame and the rear load-bearing side frame are pivoted and folded close to each other, thereby realizing the folding of the child carriage frame. The front load-bearing side frame is connected to the front foot frame, and the rear load-bearing side frame is connected to the rear foot frame. The front load-bearing side frame is pivotally connected to the front leg frame, and the rear load-bearing side frame is pivotally connected to the rear leg frame; when the front leg frame and the rear leg frame are pivotally folded toward each other, the front load-bearing side frame and the rear load-bearing side frame are pivotally folded toward each other. Wherein, the stowage device comprises: A device frame, pivotally connected to the front leg frame and the rear leg frame respectively; and A movable seat is slidably mounted on the device frame, and the movable seat is pivotally connected to the front load-bearing side frame and the rear load-bearing side frame respectively; when the front leg frame and the rear leg frame are pivotally folded toward each other, the front load-bearing side frame and the rear load-bearing side frame are also linked to slide along with the movable seat. Wherein, the child bicycle frame further comprises: A dining tray is detachably mounted on the device frame.

19. The child bicycle frame according to claim 18, characterized in that: The dinner plate is formed with elastic locking fingers, and the dinner plate is locked to the device frame by means of the elastic locking fingers.

20. The child vehicle frame according to claim 19, characterized in that: The elastic engaging finger extends downward and protrudes.

21. A child bicycle frame, switchable between an extended position and a folded position, characterized in that: include: Extension and retraction device; A front tripod, pivotally connected to the stowage device; A rear tripod is pivotally connected to the unfolding and retracting device, and the rear tripod is unfolded or retracted with the front tripod by the unfolding and retracting device; A front load-bearing side frame, pivotally connected to the stowage device; as well as The rear load-bearing side frame is pivotally connected to the unfolding and retracting device, and the rear load-bearing side frame and the front load-bearing side frame are unfolded or retracted with each other by the unfolding and retracting device; Wherein, when the child carriage frame is switched from the unfolded position to the folded position, the front leg frame and the rear leg frame are pivoted and folded close to each other, and the front load-bearing side frame and the rear load-bearing side frame are pivoted and folded close to each other, thereby realizing the folding of the child carriage frame. The front load-bearing side frame is connected to the front foot frame, and the rear load-bearing side frame is connected to the rear foot frame. Wherein, the child bicycle frame also includes a rider, which is pivotally connected to the front leg frame. The rider can switch between a push-back position and a towing position. When the rider is pivoted to the push-back position, it is on the same side as the rear leg frame, and when the rider is pivoted to the towing position, it is on the same side as the front leg frame.

22. The child vehicle frame according to claim 21, characterized in that: The rider is located outside both the front and rear kickstands.

23. A child bicycle frame, switchable between an extended position and a folded position, characterized in that: include: Extension and retraction device; A front tripod, pivotally connected to the stowage device; A rear tripod is pivotally connected to the unfolding and retracting device, and the rear tripod is unfolded or retracted with the front tripod by the unfolding and retracting device; A front load-bearing side frame, pivotally connected to the stowage device; as well as The rear load-bearing side frame is pivotally connected to the unfolding and retracting device, and the rear load-bearing side frame and the front load-bearing side frame are unfolded or retracted with each other by the unfolding and retracting device; Wherein, when the child carriage frame is switched from the unfolded position to the folded position, the front leg frame and the rear leg frame are pivoted and folded close to each other, and the front load-bearing side frame and the rear load-bearing side frame are pivoted and folded close to each other, thereby realizing the folding of the child carriage frame. The front load-bearing side frame is connected to the front foot frame, and the rear load-bearing side frame is connected to the rear foot frame. The child bicycle frame further comprises a front wheel arranged at the bottom of the front leg frame and a rear wheel arranged at the bottom of the rear leg frame, and the front wheel and the rear wheel abut against each other when the child bicycle frame is in the folded position.

24. The child vehicle frame according to claim 23, characterized in that: It also includes a rider, which includes a sleeve installed on the front leg frame and a handlebar inserted in the sleeve; when the child frame is in the folded position, the bottom end of the handlebar passes downward through the sleeve and extends to the front of the front wheel, so that the child frame stands on the ground by means of the bottom end of the handlebar, the front wheel and the rear wheel.

25. The child vehicle frame according to claim 24, characterized in that: The sleeve is pivotally connected to the front tripod, and the rider can switch between a push-back position and a tow-forward position. When the rider pivots to the push-back position, the rider is on the same side as the rear tripod, and when the rider pivots to the tow-forward position, the rider is on the same side as the front tripod.

26. The child vehicle frame according to claim 24, characterized in that: The sleeve is located on the outer side of the front tripod.

27. The child vehicle frame according to claim 25, characterized in that: A rider locking piece is provided between the sleeve and the front tripod, and the rider locking piece locks the rider and the front tripod when the rider pivots to the push-back position.

28. The child vehicle frame according to claim 27, characterized in that: The rider hand lock piece is rotatably mounted on one of the sleeve and the front foot frame, and the other of the sleeve and the front foot frame is provided with a matching locking structure matched with the rider hand lock piece.

29. The child vehicle frame according to claim 28, characterized in that: It also comprises a locking elastic member which is mounted on the sleeve or the front foot frame where the rider's locking member is located, and the locking elastic member is used to drive the rider's locking member to move in a direction to be locked with the matching locking structure.

30. The child vehicle frame according to claim 28, wherein: The bottom end of the sleeve is pivotally connected to the front tripod, and the locking structure is located at the top end of the sleeve.

Images