Baby carriage frame capable of being adjusted, folded and unfolded by one hand

Abstract

The utility model relates to the technical field of baby strollers, in particular to a baby carriage frame capable of being adjusted, folded and unfolded with one hand. Comprising a front leg, a rear leg and a push handle which are symmetrically arranged on the two sides, the rear leg and the push handle are hinged to the front leg, a linkage rod is arranged between the push handle and the rear leg, the two ends of the linkage rod are hinged to the push handle and the rear leg respectively, and a locking device used for limiting relative rotation of the push handle and the front leg is arranged between the push handle and the front leg. And an unlocking mechanism for unlocking the locking device is arranged in the push handle. After the technical scheme is adopted, the baby carriage has the beneficial effects that the baby carriage can be automatically folded by adopting the gravity of parts of the baby carriage, and the baby carriage is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of baby strollers, in particular to a baby stroller frame which can be adjusted and retracted by one hand. Background Art

[0002] A baby stroller is a hand-held stroller for infants and young children to ride in. It has various forms of opening and closing structures. When the frame is folded, the linkage mechanism on the stroller needs to be activated. The locking device of the linkage mechanism of most baby strollers is at the bottom of the frame, which requires bending over, kicking or squatting to release and fold. For users holding babies, these actions are more laborious. In addition, the locking mechanism of some baby strollers requires a certain amount of force to open, which is very inconvenient for people with less strength or who are not familiar with how to use the stroller.

[0003] Therefore, developing a baby carriage frame that is labor-saving and convenient to fold and unfold is a technical problem that we need to solve. Utility Model Content

[0004] The utility model aims to provide a baby stroller frame that can be adjusted and folded by one hand to address the defects and shortcomings of the prior art. The frame is folded under the action of its own gravity after being unlocked.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a baby stroller frame that can be adjusted and retracted with one hand, including front legs and rear legs symmetrically arranged on both sides, the rear legs are hinged to the front legs, a U-shaped push handle is hinged on the two front legs, a connecting rod is arranged between the push handle and the rear legs, the two ends of the connecting rod are respectively hinged to the push handle and the rear legs, a locking device is arranged between the push handle and the front legs for limiting the swing of the push handle under the action of gravity, and a release mechanism is arranged on the push handle for unlocking the locking device.

[0006] In some embodiments, the push handle includes side rods symmetrically arranged on both sides and a U-shaped handle bar connecting the two side rods. The two U-shaped arms of the handle bar can be slidably mounted in the side rods. The bottom of the side rod is provided with a connecting piece for connecting the front leg, and the top of the front leg is provided with a mounting seat for installing the push handle. The connecting piece is snap-fitted and installed in the mounting seat, and the connecting piece and the mounting seat are hinged at the hinge point P.

[0007] In some embodiments, the locking device includes a locking block slidably disposed in the connecting member, a sliding groove disposed on the connecting member in which the locking block can move up and down, and a locking groove disposed in the mounting seat, and a first return spring is disposed between the bottom end of the locking block and the bottom wall of the sliding groove, and under the action of the first return spring, one end of the locking block is located in the locking groove.

[0008] In some embodiments, the release mechanism includes a locking rod that can be slid up and down inside the side rod, and the locking rod is used to push the locking block to move downward to escape the restriction of the locking groove. The mounting seat is also provided with an annular groove for the locking block to slide therein, and the annular groove is arranged around the hinge point P. When pushed by the locking rod, the locking block escapes from the locking groove and enters the annular groove.

[0009] In some embodiments, a lock shell is disposed in the side rod, and a channel is provided in the lock shell that penetrates the lock shell along the length direction of the side rod, the channel is connected to the sliding groove, and the locking rod can be slidably disposed in the channel, and the bottom end of the locking rod is connected to the top end of the locking block. Under the action of the first return spring, at least a part of the top of the locking rod extends out of the upper end surface of the lock shell and is located above the lock shell.

[0010] In some embodiments, the lock release mechanism also includes a lock core for impacting the locking rod to make the locking rod move downward. The lock core is arranged at the end of the U-shaped arm of the hand-grip rod. A retractable lock tongue is arranged on the lock core. A gap is provided between the lock core and the inner wall of the side rod to accommodate the sliding of one end of the lock tongue. A limit plate is provided above the lock shell to limit the downward movement of the extended lock tongue. The limit plate is arranged in the gap. When the lock tongue is extended, the lock tongue is stuck above the top of the limiting plate.

[0011] In some embodiments, the lock core includes a lock core shell, a lock tongue can be slidably arranged on the lock core shell, and the lock tongue is restricted to slide on the lock core shell, a lock core is provided inside the lock core shell for driving the lock tongue to slide left and right on the lock core shell, the lock tongue is transmission-connected to the lock core, and a second return spring and a pull rope are connected to the top of the lock core, the second return spring is arranged between the lock core and the top inner wall of the lock core shell, the second return spring is used to drive the lock core to move downward, and the pull rope is used to pull the lock core to move upward.

[0012] In some embodiments, the lock release mechanism also includes a lock buckle arranged on the side wall of the handle bar, and the two ends of the lock buckle are respectively located on the inner and outer sides of the handle bar, and a third reset spring is installed between one end of the lock buckle located inside the push handle and the inner wall of the push handle opposite to the end, and the third reset spring is used to drive the lock buckle to pop out, and a fixed shaft for a pull rope to bypass is provided on the inner wall of the handle bar near the lock buckle, one end of the pull rope is connected to the lock core, and the other end bypasses the fixed shaft and is connected to the end of the lock buckle located inside the push handle.

[0013] In some embodiments, a locking device for locking the lock buckle is also provided on the handle bar, and the locking device includes a limit column arranged on the side wall of the handle bar opposite to the lock buckle for limiting the pressing depth of the lock buckle, the end face of the lock buckle opposite to the limit column, and a first accommodating groove and a second accommodating groove arranged on the lock buckle for accommodating the limit column. A movable push buckle is provided on the side wall of the handle bar, and the limit column is installed on the push buckle. Pushing the push buckle drives the limit column to different positions of the lock buckle.

[0014] In some embodiments, the side rod is provided with a plurality of locking holes through which locking tongues can pass, and the locking tongues extend into the locking holes to fix the handle rod on the side rod.

[0015] After adopting the above technical solution, the beneficial effects of the utility model are as follows: the solution uses the self-gravity of the baby carriage components to achieve automatic folding, and has a simple structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a right side view of the utility model.

[0019] Figure 3 It is a schematic diagram of the position structure of the connecting piece and the mounting seat of the utility model.

[0020] Figure 4 yes Figure 3 Enlarged view of the middle R part.

[0021] Figure 5 It is a schematic diagram of the mounting seat structure of the utility model.

[0022] Figure 6 It is a schematic diagram of the connecting piece structure of the utility model.

[0023] Figure 7 It is a schematic diagram of the position structure of the locking block and the mounting seat of the utility model.

[0024] Figure 8 It is a schematic diagram of the locking groove structure of the utility model.

[0025] Fig. 9 It is a schematic diagram of the position structure of the limiting plate of the utility model.

[0026] Fig.10 It is a schematic diagram of the locking rod position structure of the utility model.

[0027] Fig.11 It is a schematic diagram of the gap position between the lock core and the side rod of the utility model.

[0028] Fig.12 It is a schematic diagram of the lock core position of the utility model.

[0029] Fig.13 It is a schematic diagram of the side rod structure of the utility model.

[0030] Fig.14 It is a schematic diagram of the internal structure of the lock core of the utility model.

[0031] Fig.15 The utility model is a schematic diagram of the installation structure of the lock core shell and the lock tongue.

[0032] Fig.16 It is a structural schematic diagram of a lock core shell of the utility model.

[0033] Fig.17 It is a schematic diagram of the installation structure of the lock tongue and the lock core of the utility model.

[0034] Fig.18 It is a schematic diagram of the pull rope routing of the utility model.

[0035] Fig.19 It is a schematic diagram of the position structure of the lock buckle and the hand grip rod of the utility model.

[0036] Fig. 20 It is a schematic diagram of the fixed axis position structure on the hand grip rod of the utility model.

[0037] Fig.21 It is a schematic diagram of the internal structure of the lock of the utility model.

[0038] Fig. 22 It is a schematic diagram of the use state of the frame of the utility model.

[0039] Explanation of the accompanying drawings: front leg 10, mounting seat 101, locking groove 102, annular groove 103, rear leg 20, push handle 30, side rod 31, connecting piece 311, sliding groove 312, lock shell 313, channel 314, limiting plate 315, locking hole 316, hand grip rod 32, connecting rod 40, hinge point P, locking block 50, first return spring 51, locking rod 52, lock core 60, lock tongue 61, drive shaft 611, gap 601, lock core shell 62, left through hole 621, right through hole 622, lock gall 63, track groove 631, second return spring 64, pull rope 65, lock buckle 70, third return spring 71, end face 72, first accommodating groove 73, second accommodating groove 74, fixed shaft 320, limiting column 80, push buckle 81. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "liquid level", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher liquid level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower liquid level than the second feature.

[0045] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "liquid horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0046] An embodiment of the utility model provides a baby stroller frame that can be adjusted and folded with one hand. The frame can adjust the height of the frame with one hand and fold the frame with one hand through a release mechanism and a linkage structure, wherein the locking mechanism in the frame ensures the safety of the frame in the unfolded state.

[0047] The following combination Figures 1 to 22 , the baby stroller frame structure that can be adjusted and folded with one hand in this application is described.

[0048] A baby stroller frame that can be adjusted and folded with one hand, such as Figure 1 As shown, it includes front legs 10 and rear legs 20 symmetrically arranged on both sides, the rear legs 20 are hinged to the front legs 10, a U-shaped push handle 30 is hinged on the two front legs 10, a connecting rod 40 is arranged between the push handle 30 and the rear legs 20, and the two ends of the connecting rod 40 are respectively hinged to the push handle 30 and the rear legs 20, a locking device is arranged between the push handle 30 and the front legs 10 for limiting the swinging of the push handle 30 under the action of gravity, and a release mechanism is arranged on the push handle 30 for unlocking the locking device.

[0049] In one embodiment, Figure 1 and Figure 6 As shown, the push handle 30 includes side rods 31 symmetrically arranged on both sides and a U-shaped handle rod 32 connecting the two side rods 31 , and the two U-shaped arms of the handle rod 32 are slidably mounted in the side rods 31 .

[0050] Furthermore, if Figure 6 As shown, the bottom of the side rod 31 is provided with a connecting piece 311 for connecting the front leg 10, as shown in FIG. Figure 5As shown, the top of the front leg 10 is provided with a mounting seat 101 for mounting the push handle 30. Figure 3 to Figure 4 As shown, the connecting member 311 is mounted in the mounting seat 101 , and the connecting member 311 and the mounting seat 101 are hinged at a hinge point P. The push handle 30 can rotate around the hinge point P relative to the front leg 10 .

[0051] In one embodiment, Figure 3 , Figure 4 and Figure 7 As shown, the locking device includes a locking block 50 slidably arranged in the connecting member 311, a sliding groove 312 arranged on the connecting member 311 for the locking block 50 to move up and down therein, and a locking groove 102 arranged in the mounting seat 101, and a first return spring 51 is arranged between the bottom end of the locking block 50 and the bottom wall of the sliding groove 312. Under the action of the first return spring 51, one end of the locking block 50 is located in the locking groove 102.

[0052] In another embodiment, Figures 8 to 9 As shown, the release mechanism includes a locking rod 52 which can be slidably arranged inside the side rod 31 up and down, and the locking rod 52 is used to push the locking block 50 to move downward to escape the restriction of the locking groove 102. The mounting seat 101 is also provided with an annular groove 103 for the locking block 50 to slide therein, and the annular groove 103 is arranged around the hinge point P. Under the push of the locking rod 52, the locking block 50 escapes from the locking groove 102 and enters the annular groove 103. When the push handle 30 rotates around the hinge point P, the locking block 50 slides in the annular groove 103.

[0053] Furthermore, if Figures 9 and 10 As shown, a lock shell 313 is provided in the side rod 31, and a channel 314 is provided in the lock shell 313 along the length direction of the side rod 31, and the channel 314 is connected to the sliding groove 312. The locking rod 52 is slidably set in the channel 314, and the bottom end of the locking rod 52 is connected to the top end of the locking block 50. Under the action of the first return spring 51, at least a part of the top of the locking rod 52 extends out of the upper end surface of the lock shell 313 and is located above the lock shell 313.

[0054] Furthermore, if Fig.12 As shown, the lock release mechanism also includes a lock core 60 for impacting the locking rod 52 to make the locking rod 52 move downward. The lock core 60 is arranged at the end of the U-shaped arm of the hand-grip rod 32. A retractable lock tongue 61 is arranged on the lock core 60. A gap 601 is provided between the lock core 60 and the inner wall of the side rod 31 to accommodate the sliding of one end of the lock tongue 61.

[0055] Furthermore, if Figure 10 to Figure 11As shown, a limit plate 315 is provided above the lock housing 313 to limit the downward movement of the extended lock tongue 61. The limit plate 315 is provided in the gap 601. When the lock tongue 61 is extended, the lock tongue 61 is stuck above the top of the limit plate. The limit plate 315 is used to prevent the lock core 60 from moving downward and hitting the locking rod 52.

[0056] In one embodiment, Figures 14 to 17 As shown, the lock core 60 includes a lock core shell 62, and a lock tongue 61 can be slidably arranged on the lock core shell 62, and the lock tongue 61 is restricted from sliding on the lock core shell 62. Specifically, a left through hole 621 is provided on the left side wall of the lock core shell 62, and a right through hole 622 is provided on the right side wall of the lock core shell 62. The left end of the lock tongue 61 is passed through the left through hole 621, and the right end of the lock tongue 61 passes through the right through hole 622 and is located outside the lock core shell 62.

[0057] Furthermore, a lock core 63 is provided inside the lock core housing 62 for driving the lock tongue 61 to slide left and right on the lock core housing 62. The lock tongue 61 is transmission-connected to the lock core 63. The lock tongue 61 is provided with a driving shaft 611. The lock core 63 is provided with a track groove 631 for the driving shaft 611 to slide. Fig.17 As shown, the drive shaft 611 can be slidably disposed in the track groove 631. When the lock core 63 moves upward, the lock core 63 drives the lock tongue 61 to retract. Conversely, when the lock core 63 moves downward, the lock core 63 drives the lock tongue 61 to extend.

[0058] Furthermore, a second return spring 64 and a pull rope 65 are connected to the top of the lock core 63. The second return spring 64 is arranged between the lock core 63 and the top inner wall of the lock core housing 62. The second return spring 64 is used to drive the lock core 63 to move downward, and the pull rope 65 is used to pull the lock core 63 to move upward. The lock core 63 links the lock tongue 61 to extend and retract through the up and down movement.

[0059] In another embodiment, the release mechanism further includes a lock buckle 70 disposed on the side wall of the handle bar 32. Fig.12 As shown, the two ends of the lock buckle 70 are respectively located at the inner and outer sides of the handle bar 32, and a third return spring 71 is installed between one end of the lock buckle 70 located inside the push handle 30 and the inner wall of the push handle 30 opposite to the end, and the third return spring 71 is used to drive the lock buckle 70 to pop out. A fixed shaft 320 for the pull rope 65 to bypass is provided on the inner wall of the handle bar 32 near the lock buckle 70, one end of the pull rope 65 is connected to the lock core 63, and the other end bypasses the fixed shaft 320 and is connected to one end of the lock buckle 70 located inside the handle bar 32.

[0060] In another embodiment, Fig.13As shown, the side rod 31 is provided with a plurality of locking holes 316 for the locking tongue 61 to pass through, and the locking tongue 61 extends into the locking hole 316 to fix the hand grip 32 on the side rod 31, and the purpose of adjusting the height of the push handle 30 is achieved by locking different locking holes 316 with the locking tongue 61.

[0061] The lock buckle 70 is pressed, and the lock buckle 70 pulls the lock core 63 upward through the pull rope 65, thereby driving the lock tongue 54 to disengage from the top of the limit plate 315. Under the gravity of the hand handle 32, the hand handle 32 and the lock core 60 continue to slide downward and hit the locking rod 52. The locking rod 52 slides downward along the channel 314 under the impact of the lock core 60, thereby driving the locking block 50 to move downward and disengage from the locking groove 102 and enter the annular groove 103. The push handle 30 is acted upon by its own gravity, and the hand handle 32 moves downward around the hinge point P, the locking block 50 slides in the annular groove 103, and the frame begins to fold.

[0062] In order to further improve the safety of the frame, the lock buckle 70 is prevented from being accidentally touched and pressed when the frame is unfolded, causing the frame to collapse and injuring the baby in the car. The hand grip 32 is also provided with a locking device for locking the lock buckle 70, such as Figures 19 to 21 As shown, the locking device includes a limit column 80 arranged on the side wall of the handle rod 32 opposite to the lock buckle 70 for limiting the pressing depth of the lock buckle 70, an end face 72 of the lock buckle 70 opposite to the limit column 80, and a first accommodating groove 73 and a second accommodating groove 74 arranged on the lock buckle 70 for accommodating the limit column 80. A movable push buckle 81 is provided on the side wall of the handle rod 32, and the limit column 80 is installed on the push buckle 81. Pushing the push buckle 81 drives the limit column 80 to different positions of the lock buckle 70.

[0063] When the limiting column 80 corresponds to the lock buckle 70 and the end face 72 opposite to the limiting column 80, the lock buckle 70 cannot be pressed, and the second return spring 64 is in a free state. It should be noted that at this time, the pull rope 65 is in a taut state. Under the action of the second return spring 64, the lock core 63 drives the lock tongue 53 to extend, so that the lock tongue 53 is located above the limiting plate 315 and in the locking hole 316 on the side rod 31. The locking block 50 is located in the locking groove 102 under the action of the first return spring 51. The locking block 50 and the locking groove 102 limit the rotation of the push handle 30 relative to the front leg 10. At this time, the frame is in an unfolded and locked state, thereby ensuring the safety of the frame in the unfolded state.

[0064] When the locking clasp 70 is pressed into the first receiving groove 73, the locking clasp 70 is pressed to the depth of the first receiving groove 73. The locking clasp 70 is pressed to pull the lock core 63 upward through the pull rope 65, thereby driving the locking tongue 61 to retract. The hand grip rod 32 moves downward under the action of its own gravity, and the locking tongue 61 is staggered with the locking hole 316 on the push handle side rod 31. The lock clasp 70 is released, and the hand grip rod 32 continues to move downward under the action of its own gravity. At this time, the locking tongue 61 abuts against the push handle side rod 31 and slides. When the locking tongue 61 reaches a locking hole 316 position, the locking tongue 61 enters the locking hole 316. The height of the push handle 30 is adjusted once. If the height is not appropriate, adjust it according to the above operation until it is satisfactory. It should be noted that when the bottom of the lock core 60 is close to the locking rod 52, the lock buckle 70 is limited by the first receiving groove 73 and the limiting column 80 to pull the lock core 63 to move upward. At this time, the upward movement distance of the lock core 63 can only drive the lock tongue 61 to disengage from the locking hole 316 on the side rod 31, and cannot make the lock tongue 61 disengage from the limiting plate 315. This design can prevent excessive pressing of the lock buckle 70 when adjusting the height of the push handle 30, resulting in the frame being folded and causing injuries to the baby in the car. After adjustment, push the limiting column 80 to the end face 72 of the lock buckle 70 opposite to the limiting column 80, so as to ensure the safety of the frame when it is unfolded.

[0065] When the limit column 80 corresponds to the second receiving groove 74, the depth of the lock buckle 70 is pressed to the depth of the second receiving groove 74, and the frame is in the unlocked and retractable state. Push the push buckle 81 to align the limit column 80 with the second limit groove 62, press the lock buckle 70, and the lock buckle 70 slides along the limit column 80 into the hand grip rod 32, and then pulls the pull rope 65, and the pull rope 65 pulls the lock core 63 to move upward, thereby driving the lock tongue 61 to retract and disengage from the locking hole 316 on the side rod 31. The hand grip rod 32 drives the lock core 60 to move downward under the action of its own gravity, and releases the lock buckle 70. The hand grip rod 32 drives the lock core 60 to move downward to the upper side of the limit plate 315 under the action of its own gravity, and presses the lock buckle 70 again to disengage the lock tongue 61 from the limit plate 315. The lock core 60 is in the hand grip rod 32. The grip rod 32 hits the locking rod 52 under the action of its own gravity, and the locking rod 52 slides downward along the channel 314, thereby driving the locking block 50 to move downward and disengage from the locking groove 102 on the push handle mounting groove 102 and enter the annular groove 103. The grip rod 32 moves downward around the hinge point P under the action of the push handle 30's own gravity, and the push handle connecting piece 311 can rotate relative to the push handle mounting seat 101. At this time, the locking block 50 can slide in the annular groove 103 following the rotation of the push handle connecting piece 311, and the push handle side rod 31 drives the rear leg 20 to move closer to the front leg 10 through the connecting rod 40 to complete the vehicle folding work.

[0066] When the frame needs to be unfolded, the hand grip rod 32 is lifted upward to move it upward around the hinge point P. When the locking block 50 slides in the annular groove 103 to the locking groove 102, under the action of the first return spring 51, the locking block 50 is stuck in the locking groove 102. At this time, the push handle side rod 31 is locked and cannot rotate relative to the front leg 10. The push handle side rod 31 drives the rear leg 20 away from the front leg 10 to be in an unfolded state through the connecting rod 40. The hand grip rod 32 is pulled upward from the push handle side rod 31 to adjust the height of the push handle 30.

[0067] When the frame in this application is in use, a seat for an infant to sit on needs to be installed on the frame, such as Fig. 22 As shown, the seat can be installed in the manner known in the prior art.

[0068] After adopting the above technical solution, the beneficial effects of the utility model are as follows: the solution uses the self-gravity of the baby carriage components to achieve automatic folding, and has a simple structure and is easy to use.

[0069] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A baby stroller frame that can be adjusted and folded with one hand, characterized in that: It includes front legs and rear legs symmetrically arranged on both sides, the rear legs are hinged to the front legs, a U-shaped push handle is hinged on the two front legs, a connecting rod is arranged between the push handle and the rear legs, the two ends of the connecting rod are respectively hinged to the push handle and the rear legs, a locking device for limiting the swing of the push handle under the action of gravity is arranged between the push handle and the front legs, and a release mechanism for unlocking the locking device is arranged on the push handle.

2. A baby stroller frame that can be adjusted and retracted with one hand according to claim 1, characterized in that: The push handle includes side rods symmetrically arranged on both sides and a U-shaped handlebar connecting the two side rods. The two U-shaped arms of the handlebar can be slidably mounted in the side rods. The bottom of the side rod is provided with a connecting piece for connecting the front legs, and the top of the front leg is provided with a mounting seat for installing the push handle. The connecting piece is snap-fitted and installed in the mounting seat, and the connecting piece and the mounting seat are hinged at a hinge point P.

3. A baby stroller frame that can be adjusted and retracted with one hand according to claim 2, characterized in that: The locking device includes a locking block slidably arranged in the connecting member, a sliding groove arranged on the connecting member for the locking block to move up and down therein, and a locking groove arranged in the mounting seat. A first return spring is arranged between the bottom end of the locking block and the bottom wall of the sliding groove. Under the action of the first return spring, one end of the locking block is located in the locking groove.

4. A baby stroller frame that can be adjusted and retracted with one hand according to claim 3, characterized in that: The release mechanism includes a locking rod slidably arranged inside the side rod, and the locking rod is used to push the locking block to move downward to escape the restriction of the locking groove. The mounting seat is also provided with an annular groove for the locking block to slide therein, and the annular groove is arranged around the hinge point P. When pushed by the locking rod, the locking block escapes from the locking groove and enters the annular groove.

5. The baby stroller frame that can be adjusted and retracted with one hand according to claim 4, characterized in that: A lock shell is arranged in the side rod, and a channel is arranged in the lock shell which penetrates the lock shell along the length direction of the side rod, and the channel is connected with the sliding groove. The locking rod can be slidably arranged in the channel, and the bottom end of the locking rod is connected with the top end of the locking block. Under the action of the first return spring, at least a part of the top of the locking rod extends out of the upper end surface of the lock shell and is located above the lock shell.

6. The baby stroller frame that can be adjusted and retracted with one hand according to claim 5, characterized in that: The lock release mechanism also includes a lock core for impacting the locking rod to make the locking rod move downward. The lock core is arranged at the end of the U-shaped arm of the hand-grip rod. A retractable lock tongue is arranged on the lock core. A gap is provided between the lock core and the inner wall of the side rod to accommodate the sliding of one end of the lock tongue. A limit plate is provided above the lock shell to limit the downward movement of the extended lock tongue. The limit plate is arranged in the gap. When the lock tongue is extended, the lock tongue is stuck above the top of the limiting plate.

7. The one-hand adjustable and retractable baby stroller frame according to claim 6, characterized in that: The lock core includes a lock core shell, a lock tongue can be slidably arranged on the lock core shell, and the lock tongue is restricted to slide on the lock core shell. A lock core is provided inside the lock core shell for driving the lock tongue to slide left and right on the lock core shell. The lock tongue is transmission-connected to the lock core. A second return spring and a pull rope are connected to the top of the lock core. The second return spring is arranged between the lock core and the top inner wall of the lock core shell. The second return spring is used to drive the lock core to move downward, and the pull rope is used to pull the lock core to move upward.

8. The one-hand adjustable and foldable baby stroller frame according to claim 7, characterized in that: The lock releasing mechanism also includes a lock buckle arranged on the side wall of the handle bar, the two ends of the lock buckle are respectively located on the inner and outer sides of the handle bar, a third reset spring is installed between one end of the lock buckle located inside the push handle and the inner wall of the push handle opposite to the end, the third reset spring is used to drive the lock buckle to pop out, and a fixed shaft for a pull rope to bypass is provided on the inner wall of the handle bar near the lock buckle, one end of the pull rope is connected to the lock core, and the other end bypasses the fixed shaft and is connected to the end of the lock buckle located inside the push handle.

9. The one-hand adjustable and foldable baby stroller frame according to claim 8, characterized in that: The handlebar is also provided with a locking device for locking the lock buckle, and the locking device includes a limit column arranged on the side wall of the handlebar opposite to the lock buckle for limiting the pressing depth of the lock buckle, the end face of the lock buckle opposite to the limit column, and a first accommodating groove and a second accommodating groove arranged on the lock buckle for accommodating the limit column. A movable push buckle is provided on the side wall of the handlebar, and the limit column is installed on the push buckle. Pushing the push buckle drives the limit column to different positions of the lock buckle.

10. The one-hand adjustable and foldable baby stroller frame according to claim 2, characterized in that: The side rod is provided with a plurality of locking holes for the locking tongues to pass through, and the locking tongues extend into the locking holes to fix the handle bar on the side rod.

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