Stroller frame assembly and locking mechanism

Abstract

A stroller frame assembly and a locking mechanism are disclosed, the stroller frame assembly comprises a push rod, lower rods and a support, two lower ends of the push rod are rotatably connected with upper ends of the two lower rods, and lower ends of the two lower rods are rotatably connected with two upper ends of the support; the locking mechanism comprises a first locking assembly used for locking the push rod and the lower rod and a second locking assembly used for locking the lower rod and the support. The first locking assembly comprises a first locking piece arranged at the lower end of the push rod, a first unlocking piece, a first reset spring and a first fixing piece arranged at the upper end of the lower rod. The second unlocking piece, the second locking piece and the second reset spring are arranged at the lower end of the lower rod, and the second fixing piece is arranged at the upper end of the support. According to the utility model, the connecting rope is adopted for unlocking driving, so that the plate of the rod piece can be thinner, and the device is suitable for frame plates made of various materials and with different thicknesses.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of children's pushchair, specifically to a children's pushchair frame assembly and locking mechanism. BACKGROUND

[0002] The existing pushchair joint structure is usually too complex, and basically uses gear locking, or the components need to be specially made very strong to meet the test standard, which also brings some disadvantages: the use has certain limitations, the universality is not high, and is not applicable to the pushchair frame whose plate thickness is limited due to material cost.

[0003] Therefore, how to solve the deficiencies existing in the prior art becomes the subject to be studied and solved by the utility model. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a children's pushchair frame assembly and locking mechanism.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of a children's pushchair frame assembly and locking mechanism, wherein the frame assembly comprises a push rod, a lower rod and a support, the lower ends of the push rod are rotationally connected with the upper ends of the two lower rods, and the lower ends of the two lower rods are rotationally connected with the upper ends of the support.

[0006] The locking mechanism comprises a first locking assembly for locking the push rod and the lower rod and a second locking assembly for locking the lower rod and the support.

[0007] The first locking assembly comprises a first locking piece, a first unlocking piece and a first return spring arranged at the lower end of the push rod and a first fixing piece arranged at the upper end of the lower rod.

[0008] Among them: the first locking piece is driven to separate from the first fixing piece through the first unlocking piece, so that the push rod and the lower rod can be relatively rotated and folded; the first locking piece is driven to be clamped with the first fixing piece through the first return spring, so that the unfolded push rod and the lower rod are kept locked.

[0009] The second locking assembly comprises a second unlocking piece, a second locking piece and a second return spring arranged at the lower end of the lower rod and a second fixing piece arranged at the upper end of the support.

[0010] Among them: the second unlocking piece is driven by the rotating push rod, drives the second locking piece to separate from the second fixing piece, so that the lower rod and the support can be relatively rotated and folded; the second locking piece is driven to be clamped with the second fixing piece through the second return spring, so that the unfolded lower rod and the support are kept locked.

[0011] Preferably, the push rod comprises a push handle and two upper rods connected at both ends of the push handle, the lower ends of the two upper rods are rotatably connected with the upper ends of two lower rods, the upper rods are provided with a sliding slot along the length direction, the first locking member is in sliding fit with the sliding slot; the first fixing member is provided with a first locking hole for clamping the first locking member;

[0012] The first unlocking member comprises a first connecting rope, one end of the first connecting rope is fixedly connected with the first locking member, the other end of the first connecting rope passes through the upper rod to the first pull rope mechanism arranged in the middle of the push rod, the first connecting rope is driven by the first pull rope mechanism to pull the first locking member out of the first locking hole;

[0013] The first pull rope mechanism comprises an unlocking button, a rotating disc and a torsional spring; the rotating disc is fixedly connected with the first connecting rope, the rotating disc is rotatably driven by the unlocking button, the rotating disc winds the first connecting rope to pull the first locking member; the rotating disc is reversely rotated by the force of the torsional spring to unwind the first connecting rope;

[0014] A first limiting slot is arranged in the sliding slot, one side of the bottom of the first locking member is protruded to form a supporting table, the supporting table is in sliding fit with the first limiting slot;

[0015] The two ends of the first reset spring are respectively abutted with the supporting table and the top end of the first limiting slot, when the upper rods and the lower rods are unfolded, the first reset spring pushes the first locking member to be clamped with the first locking hole.

[0016] Further preferably, the lower end of the upper rod is rotatably connected with the upper end of the lower rod through the first fixing member, the first fixing member and the lower rod are relatively fixed through a plurality of insertion slots and insertion rods, the first fixing member and the upper rod are rotatably connected through a convex ring and an annular groove.

[0017] Further preferably, the convex ring and the insertion rod are respectively fixed on the two side surfaces of the first fixing member, the first locking hole is arranged on the convex ring, the insertion slot is arranged on the inner side of the upper end of the lower rod, and the annular groove is arranged on the outer side of the lower end of the upper rod.

[0018] Preferably, the second unlocking member comprises a fixed shaft, a second pull rope structure and a second connecting rope;

[0019] The fixed shaft is coaxially arranged with the upper rotating end of the upper rod and is detachably fixedly connected with the upper rod, the fixed shaft penetrates the first fixing member and cooperates with the second pull rope structure;

[0020] The second pull rope is connected with the second pull rope structure and the second locking member at two ends respectively, and the fixed shaft following the rotation of the upper rod drives the second pull rope structure to wind the second connecting rope to pull the second locking member to separate from the second fixing member.

[0021] Further preferably, the second pull rope structure and the second locking member are arranged inside the upper and lower rotating ends of the lower rod respectively, and the second pull rope structure comprises an unlocking member and a driving member.

[0022] The unlocking member is a cam, and the cam is fixed opposite to the fixed shaft.

[0023] The driving member comprises a driving frame arranged in a waist circle shape, and the driving frame is arranged with a positioning protrusion and a rope joint for connecting the second connecting rope on two horizontal planes in the up-down direction respectively; a waist circle groove is formed in one side surface of the lower rod and is in sliding cooperation with the driving frame, and the outer sides of the two horizontal planes of the waist circle groove are provided with positioning grooves corresponding to the positioning protrusion and the rope joint respectively.

[0024] The cam is arranged in the driving frame, and the driving frame has a horizontal frame surface inside the frame, and the distance between the horizontal frame surface and the rotation center of the cam is smaller than the radius of the cam; when the cam follows the rotation of the fixed shaft to abut the outer arc surface of the cam against the horizontal frame surface, the driving frame drives the second connecting rope to move upward to separate the second locking member from the second fixing member.

[0025] Further preferably, a special-shaped hole is formed in the cam, one end of the fixed shaft is matched with the special-shaped hole, and the cam is fixed opposite to the fixed shaft through the special-shaped hole.

[0026] Further preferably, an installation groove for accommodating the second locking member is formed in the lower rod, one end of the second locking member is rotationally connected with the lower rod, and the other end of the second locking member is rotated to move out of the second locking port on the second fixing member under the driving of the second connecting rope moving upward;

[0027] A compression cover is detachably connected outside the installation groove, an arc-shaped hole is formed in the compression cover, and the other end of the second locking member penetrates through the arc-shaped hole and rotates in the arc-shaped hole.

[0028] The second reset spring is sleeved outside the second connecting rope, a second limiting groove is formed in the top of the installation groove, and the two ends of the second reset spring are respectively abutted against the top end of the second limiting groove and the groove body on the second locking member; when the lower rod and the support are unfolded, the second reset spring pushes the second locking member to be clamped with the second locking port.

[0029] Further preferably, the frame assembly further comprises a canopy rod for fixing a stroller canopy, the canopy rod is rotatably connected with the lower end of the two upper rods through the other end of the fixing shaft and the canopy seat arranged outside the lower rod, the other end of the fixing shaft is a cylinder, and the cylinder is rotatably connected with the lower rod and the canopy seat;

[0030] The locking mechanism further comprises a third locking assembly for locking the canopy rod and the upper rod;

[0031] The third locking assembly comprises a disc coaxially fixed between the two ends of the fixing shaft, the disc is located between the lower rod and the canopy seat, locking grooves are formed in the disc and matched with locking blocks on the canopy seat, and the canopy seat drives the locking blocks to press into the locking grooves under the drive of an elastic structure, so that the canopy rod and the upper rod are locked.

[0032] Further preferably, the disc is rotatably matched with the lower rod and the canopy seat, and the locking grooves and the locking blocks are arranged at the edges of the annular protrusions and the circular grooves rotatably matched with the disc and the canopy seat;

[0033] The locking grooves are arranged in at least two pairs, and the locking blocks are arranged in at least one pair, and each pair of locking grooves or locking blocks is symmetrically arranged on a diameter passing through the axis of the fixing shaft;

[0034] The elastic structure comprises a canopy pressing cover arranged outside the canopy seat, the canopy pressing cover is detachably fixedly connected with the cylinder, and a compression spring is arranged in a cavity formed between the canopy pressing cover and the canopy seat.

[0035] The working principle and advantages of the utility model are as follows:

[0036] The utility model adopts the connecting rope to drive unlocking, can make the plate of the rod thinner, and is suitable for various materials and different thicknesses of frame plates.

[0037] The utility model utilizes the disc-shaped first fixing part to connect the upper rod and the lower rod, the convex structures for connecting the upper rod and the lower rod are arranged on the first fixing part, and the groove structures are arranged on the upper rod and the lower rod, so that the upper rod and the lower rod can be made thinner while ensuring stable rotation of the upper rod and the lower rod, and plate consumption during processing of the upper rod and the lower rod is reduced.

[0038] The utility model utilizes a fixing shaft to drive the locking assembly between the lower rod and the support, the fixing shaft is provided with a disc, the disc can be used as the locking assembly of the canopy rod, one structure has multiple purposes, the locking mechanism is simplified, the axial space occupation of the locking mechanism is reduced, and the whole frame and the locking mechanism are more compact and stable in connection.

[0039] The utility model discloses simple structure, high universality can be applicable to the frame of different material, such as wooden frame, plastic frame, metal frame, and wide application range. BRIEF DESCRIPTION OF DRAWINGS

[0040] BRIEF DESCRIPTION OF DRAWINGS Figure 1 It is the side view of the utility model embodiment;

[0041] BRIEF DESCRIPTION OF DRAWINGS Figure 2 It is the front view of the utility model embodiment;

[0042] BRIEF DESCRIPTION OF DRAWINGS Figure 3 It is the explosion map of upper rod, lower rod and support of the left side of the utility model embodiment;

[0043] BRIEF DESCRIPTION OF DRAWINGS Figure 4 It is the explosion map of upper rod, lower rod and support of the left side of the utility model embodiment;

[0044] BRIEF DESCRIPTION OF DRAWINGS Figure 5 It is the partial explosion map of the utility model embodiment;

[0045] BRIEF DESCRIPTION OF DRAWINGS Figure 6 It is the first unlocking piece explosion map of the utility model embodiment;

[0046] BRIEF DESCRIPTION OF DRAWINGS Figure 7 It is the cross section view of the upper rod and lower rod of the utility model embodiment under the unfolded state;

[0047] BRIEF DESCRIPTION OF DRAWINGS Figure 8 It is the structure of the utility model Figure 7 A part enlarged view;

[0048] BRIEF DESCRIPTION OF DRAWINGS Figure 9 It is the cross section view of the upper rod and lower rod of the utility model embodiment under the folded state;

[0049] BRIEF DESCRIPTION OF DRAWINGS Figure 10 It is the structure of the utility model Figure 9 B part enlarged view.

[0050] In the above drawing:

[0051] 1 push handle;

[0052] 2 upper rod;21 sliding groove;22 first limiting slot;23 annular groove;

[0053] 3 lower rod;31 waist round groove;32 positioning groove;33 installation groove;34 second limiting slot;35 insertion groove;36 first circular recess;37 gland;371 arc hole;

[0054] 4 support;

[0055] 5 pen holder;51 pen seat;511 annular protrusion;

[0056] 6 first locking assembly; 61 first locking member; 611 support platform; 62 first unlocking member; 621 first connecting rope; 622 first pulling rope mechanism; 6221 unlocking button; 6222 rotating disc; 6223 torsional spring; 6224 button reset spring; 63 first reset spring; 64 first fixing member; 641 first locking port; 642 insertion rod; 643 convex ring;

[0057] 7 second locking assembly; 71 second unlocking member; 711 fixing shaft; 712 second connecting rope; 713 unlocking member; 7131 special-shaped hole; 714 driving member; 7141 driving frame; 71411 horizontal frame surface; 7142 positioning protrusion; 7143 rope joint; 72 second locking member; 73 second reset spring; 74 second fixing member; 741 second locking port;

[0058] 8 third locking assembly; 81 disc; 811 locking groove; 812 second circular groove; 82 locking block; 83 elastic structure; 831 pressing cap; 832 compression spring. DETAILED DESCRIPTION

[0059] The utility model will be further described below in combination with the drawings and examples:

[0060] Examples: the present case will be clearly explained by the drawings and detailed description, any person skilled in the art can change and modify the technology taught by the present case after understanding the examples of the present case, which does not deviate from the spirit and scope of the present case.

[0061] The language in this paper is only for describing specific embodiments and is not intended to limit the present case. The singular form such as "one", "this", "this", "this" and "the" is also used in this paper, which also includes the plural form.

[0062] As for "first", "second" and the like used in this paper, it is not particularly intended to indicate the order or sequence, nor is it intended to limit the present case, which is only for distinguishing the components or operations described by the same technical language.

[0063] As for "connection" or "positioning" used in this paper, it can mean that two or more components or devices are in direct physical contact with each other, or in indirect physical contact with each other, or can mean that two or more components or devices operate or act on each other.

[0064] As for "contain", "include", "have" and the like used in this paper, they are all open terms, that is, they mean containing but not limited to.

[0065] As used herein, the terms have their ordinary meaning in the field of use, unless otherwise indicated. Certain terms used to describe the application are discussed below or elsewhere in the specification to provide additional guidance to the skilled worker in the art regarding the descriptions of the application.

[0066] As used herein, the terms "front", "back", "up", "down", "left", "right" and the like refer to directions in the drawings to which the application is illustrated and are not intended to mean specific orientations of the application as embodied herein or when in use.

[0067] Referring to the drawings Figures 1-10 A child stroller frame assembly and locking mechanism, the frame assembly includes a push rod, a lower rod 3, a bracket 4 for mounting wheels and the like structure, and a canopy rod 5 for fixing the stroller canopy, the lower ends of the push rod are connected to the upper ends of the two upper rods 2, and the lower ends of the two lower rods 3 are rotatably connected to the upper ends of the bracket 4. The push rod includes a push handle 1 and an upper rod 2 connected to both ends of the push handle 1, and the lower ends of the two upper rods 2 are rotatably connected to the upper ends of the two lower rods 3, respectively.

[0068] The locking mechanism includes a first locking assembly 6 for locking the push rod and the lower rod 3, a second locking assembly 7 for locking the lower rod 3 and the bracket 4, and a third locking assembly 8 for locking the canopy rod 5 and the upper rod 2. Among them:

[0069] Referring to the drawings Figures 3-6 The first locking assembly 6 includes a first locking member 61 provided at the lower end of the push rod, a first unlocking member 62, a first reset spring 63, and a first fixing member 64 provided at the upper end of the lower rod 3.

[0070] The first locking member 61 is driven to separate from the first fixing member 64 through the first unlocking member 62, so that the push rod and the lower rod 3 can be folded relative to each other; the first locking member 61 is driven to be clamped with the first fixing member 64 through the first reset spring 63, so that the unfolded push rod and the lower rod 3 are kept locked.

[0071] In this embodiment, the outer side wall of the upper rod 2 is provided with a sliding groove 21 along the length direction thereof, the first locking member 61 is in sliding cooperation with the sliding groove 21, the first locking member 61 is a vertically distributed rectangular thin plate, the sliding groove 21 is a rectangular groove body, and the first locking member 61 slides along the length direction of the upper rod 2.

[0072] The first fixing member 64 is provided with a first locking port 641 for clamping the first locking member 61, and the first locking port 641 is clamped with the lower end of the first locking member 61.

[0073] The first unlocking piece 62 comprises a first connecting rope 621, one end of which is fixedly connected with the first locking piece 61, and the other end passes through a wire slot on the outer wall of the upper rod 2 to the inside of the push handle 1 and is connected with a first pulling rope mechanism 622 arranged in the middle of the push handle 1. The first connecting rope 621 is driven through the first pulling rope mechanism 622 to pull the first locking piece 61 out of the first lock port 641.

[0074] A first limiting slot 22 is formed in the chute 21, and a support table 611 is formed on one side of the bottom of the first locking piece 61, which is in sliding fit with the first limiting slot 22. The two ends of the first reset spring 63 are respectively abutted against the support table 611 and the top end of the first limiting slot 22. When the upper rod 2 and the lower rod 3 are unfolded, the first reset spring 63 pushes the first locking piece 61 to be clamped with the first lock port 641.

[0075] The first pulling rope mechanism 622 comprises an unlocking key 6221, a rotating disc 6222 and a torsional spring 6223. The rotating disc 6222 is fixedly connected with the first connecting rope 621 and rotates under the action of the unlocking key 6221 to wind the first connecting rope 621 and pull the first locking piece 61. The rotating disc 6222 reversely rotates under the action of the torsional spring 6223 to unwind the first connecting rope 621.

[0076] The push handle 1 can be composed of an upper cover and a lower cover which are connected by buckling from top to bottom. The buckled upper cover and lower cover have a cavity accommodating the rotating disc 6222 and a wire slot accommodating the first connecting rope 621. The rotating disc 6222 is rotationally connected with the lower cover through a shaft, and the torsional spring 6223 is sleeved on the shaft and has its two ends fixedly connected with the lower cover and the rotating disc 6222.

[0077] Since each of the upper rod 2 and the lower rod 3 is provided with a first locking assembly 6, the unlocking button 6221 and the button reset spring 6224 of the two first locking assemblies 6 can be provided with only one, and the unlocking button 6221 is provided with two push plates corresponding to the push blocks on the two rotating discs 6222, when the unlocking button 6221 is pressed, the two push plates push the push blocks, so that the rotating disc 6222 rotates counterclockwise, thereby winding the first connecting rope 621, at this time the torsional spring 6223 is energized; when the unlocking button 6221 is released, the torsional spring 6223 drives the rotating disc 6222 to rotate reversely, thereby unwinding the first connecting rope 621. The unlocking button 6221 and the lower cover are further provided with a button reset spring 6224, which can pop up and reset the unlocking button 6221 when the unlocking button 6221 is released.

[0078] In other embodiments, the first pulling rope mechanism 622 can also use other winding and unwinding devices, and the first locking member 61 can also use other locking structures, as long as it is driven by the first connecting rope 621. The first connecting rope 621 can drive the plate of the upper rod 2 to be thinner, and is suitable for various materials and different thicknesses of frame plates.

[0079] In order to further improve the stability of the rotating connection and locking of the upper rod 2 and the lower rod 3, the lower end of the upper rod 2 and the upper end of the lower rod 3 are rotatably connected through the first fixing member 64. The first fixing member 64 and the lower rod 3 are relatively fixed through a plurality of insertion slots 35 and insertion rods 642, and the first fixing member 64 and the upper rod 2 are rotatably connected through a convex ring 643 and an annular groove 23.

[0080] In order to reduce the thickness requirement of the plate of the upper rod 2 and the lower rod 3, the convex ring 643 and the insertion rod 642 are respectively fixed on the two side surfaces of the first fixing member 64, the first locking port 641 is opened on the convex ring 643, the insertion slot 35 is arranged on the inner side of the upper end of the lower rod 3, and the annular groove 23 is arranged on the outer side of the lower end of the upper rod 2. In this way, the upper rod 2 and the lower rod 3 are both groove structures, which can reduce the consumption of plate materials.

[0081] Referring to Figs. 1 and 2, Figures 3-5 and Figs. 3 and 4, Figures 7-10 the second locking assembly 7 includes a second unlocking member 71, a second locking member 72 and a second reset spring 73 arranged at the lower end of the lower rod 3, and a second fixing member 74 arranged at the upper end of the bracket 4.

[0082] The second unlocking member 71 is driven by the rotating push rod, and drives the second locking member 72 to separate from the second fixing member 74, so that the middle rod and the support 4 can be relatively rotated and folded; the second locking member 72 is driven by the second reset spring 73 to be clamped with the second fixing member 74, so as to keep the unfolded middle rod and the support 4 locked.

[0083] In the embodiment, the second unlocking member 71 includes a fixed shaft 711, a second pull rope structure and a second connecting rope 712; the fixed shaft 711 is coaxially arranged with the upper rotating end of the upper rod 2, and is detachably fixedly connected with the upper rod 2, and the fixed shaft 711 penetrates the first fixing member 64 and cooperates with the second pull rope structure. One end of the fixed shaft 711 near the upper rod 2 has a threaded hole, the fixed shaft 711 penetrates the upper rod 2 and is fixedly connected with the upper rod 2 by a screw and a nut.

[0084] The two ends of the second pull rope are respectively connected with the second pull rope structure and the second locking member 72, and the fixed shaft 711 rotating with the upper rod 2 drives the second pull rope structure to wind the second connecting rope 712, so as to pull the second locking member 72 away from the second fixing member 74.

[0085] The second pull rope structure and the second locking member 72 are respectively arranged inside the upper and lower rotating ends of the lower rod 3, and the second pull rope structure includes an unlocking member 713 and a driving member 714.

[0086] The unlocking member 713 adopts a cam, and the cam is relatively fixed with the fixed shaft 711; in the embodiment, a special-shaped hole 7131 is formed in the cam, one end of the fixed shaft 711 matches the special-shaped hole 7131, and the cam is relatively fixed with the fixed shaft 711 through the special-shaped hole 7131.

[0087] The driving member 714 includes a driving frame 7141, which is arranged in a waist round shape, and its two horizontal planes in the up-down direction are respectively provided with a positioning protrusion 7142 and a rope joint 7143 for connecting the second connecting rope 712; a waist round groove 31 is formed in one side surface of the lower rod 3 and slidably matches the driving frame 7141, and the outer sides of the two horizontal planes of the waist round groove 31 are respectively provided with positioning grooves 32 corresponding to the positioning protrusion 7142 and the rope joint 7143.

[0088] The cam is arranged in the driving frame 7141, and the driving frame 7141 has a horizontal frame surface 71411 in the frame, the distance between the horizontal frame surface 71411 and the rotation center of the cam is less than the radius of the cam, when the cam rotates along with the fixed shaft 711 to the outer arc surface of the cam abuts against the horizontal frame surface 71411, the driving frame 7141 drives the second connecting rope 712 to move upwards, so that the second locking part 72 is separated from the second fixing part 74.

[0089] The lower rod 3 is provided with a mounting groove 33 for accommodating the second locking part 72, and the mounting groove 33 has limiting surfaces matched with both ends of the second locking part 72 in the initial state and the rotated-in-place state. One end of the second locking part 72 is rotationally connected with the lower rod 3, and the other end is driven by the second connecting rope 712 moving upwards to rotate out of the second locking port 741 on the second fixing part 74.

[0090] The mounting groove 33 is detachably connected with a gland 37, the gland 37 is provided with an arc-shaped hole 371, the other end of the second locking part 72 penetrates through the arc-shaped hole 371 and rotates in the arc-shaped hole 371, and the arc-shaped hole 371 can ensure that the second locking part 72 swings along an arc-shaped path, so that the locking is smooth and stable.

[0091] The second reset spring 73 is sleeved outside the second connecting rope 712, the mounting groove 33 is provided with a second limiting groove 34 at the top, and the two ends of the second reset spring 73 are respectively abutted against the top end of the second limiting groove 34 and the groove body on the second locking part 72, when the lower rod 3 and the support 4 are unfolded, the second reset spring 73 pushes the second locking part 72 to be clamped with the second locking port 741.

[0092] In other embodiments, the second pulling rope mechanism can also use other winding and unwinding devices, and the second locking part 72 can also use other locking structures, as long as it is driven by the second connecting rope 712, the second connecting rope 712 can make the plate of the lower rod 3 thinner, and be suitable for various materials and different thicknesses of frame plates.

[0093] Referring to the accompanying drawings, Figures 1-4 The frame assembly further comprises a canopy rod 5 for fixing a stroller canopy, the canopy seats 51 at the two ends of the canopy rod 5 are rotationally connected with the lower ends of the two upper rods 2 through the other ends of the fixed shafts 711, the canopy seats 51 are arranged outside the lower rod 3, and the other end of the fixed shaft 711 is a cylindrical body which penetrates through the lower rod 3 and rotationally connects the lower rod 3 and the canopy seat 51.

[0094] Referring to the drawings Figures 3-4 The third locking assembly 8 comprises a disc 81 coaxially fixed between the two ends of the fixed shaft 711, which is located between the lower rod 3 and the canopy 51. A locking groove 811 is formed on the disc 81 and cooperates with a locking block 82 on the canopy 51. The canopy 51 is driven by an elastic structure 83 to press the locking block 82 into the locking groove 811, so that the umbrella rod 5 and the upper rod 2 are locked.

[0095] The disc 81 is rotationally fitted with the first circular groove 36 on the outer wall of the lower rod 3. The disc 81 is rotationally fitted with the annular protrusion 511 and the second circular groove 812 between the disc 81 and the canopy 51. The locking groove 811 and the locking block 82 are respectively arranged at the edges of the annular protrusion 511 and the second circular groove 812 rotationally fitted between the disc 81 and the canopy 51. In this embodiment, the second circular groove 812 is arranged on the outer side of the disc 81, the annular protrusion 511 is arranged on the inner side of the canopy 51, the locking groove 811 is formed on the radial edge of the second circular groove 812, and the locking block 82 is protrudingly arranged on the radial edge of the annular protrusion 511.

[0096] In this embodiment, two pairs of locking grooves 811 and one pair of locking blocks 82 are arranged symmetrically on a diameter passing through the axis of the fixed shaft 711. Thus, when the disc 81 rotates with the fixed shaft 711, the locking blocks 82 on the canopy 51 can be locked with the locking grooves 811 on the disc 81 at intervals.

[0097] The elastic structure 83 comprises a canopy pressing cover 831 arranged on the outer side of the canopy 51. A hole is formed on the canopy pressing cover 831, and a screw is detachably connected with a threaded hole on the end face of the cylinder through the hole, so as to realize the detachable fixed connection of the canopy pressing cover 831 with the cylinder. A compression spring 832 is arranged in a cavity formed between the canopy pressing cover 831 and the canopy 51. The two ends of the compression spring 832 abut against the canopy 51 and the canopy pressing cover 831 respectively. When the canopy pressing cover 831 is fixed with the cylinder, the compression spring 832 will push the canopy 51 to move towards the lower rod 3. The canopy 51 drives the locking block 82 to be elastically locked with the locking groove 811 on the disc 81.

[0098] When the above-mentioned frame assembly is folded, the unlocking button 6221 is pressed, the first connecting rope 621 drives the first locking member 61

[0099] When the first locking piece 61 is disengaged from the first locking hole 641, the first fixing piece 64 is not blocked, and the upper rod 2 can be folded by rotating relative to the lower rod 3; when the upper rod 2 rotates, the fixed shaft 711 rotates, the unlocking piece 713 rotates, the unlocking piece 713 drives the driving piece 714 to move upwards, the driving piece 714 pulls the second connecting rope 712 upwards, and the second connecting rope 712 drives the second locking piece 72 to rotate and disengage from the second locking hole 741, so that the lower rod 3 can be folded by rotating relative to the support 4.

[0100] When the frame assembly is folded, the awning rod 5 drives the awning seat 51 to rotate around the cylinder, that is, the awning rod 5 can be folded by rotating with the upper rod 2. The awning rod 5 can also be opened alone, and when it is opened, the awning seat 51 rotates around the cylinder and the disc 81, and when the locking block 82 corresponds to the locking groove 811, the locking block 82 is clamped into the locking groove 811 under the elastic force of the torsional spring 6223, so that the tent on the awning seat 51 is locked.

[0101] When the frame assembly is unfolded, the first locking piece 61 is inserted into the first locking hole 641 under the elastic force of the first return spring 63, so that the unfolded upper rod 2 and the lower rod 3 are locked; the second locking piece 72 is reversely rotated and inserted into the second locking hole 741 under the elastic force of the second return spring 73, so that the unfolded lower rod 3 and the support 4 are locked.

[0102] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A stroller frame assembly and locking mechanism, characterized by: The frame assembly comprises a push rod, two lower rods and a support, the lower ends of the push rod are rotatably connected to the upper ends of the two lower rods, the lower ends of the two lower rods are rotatably connected to the upper ends of the support; The locking mechanism comprises a first locking assembly for locking the push rod and the lower rod and a second locking assembly for locking the lower rod and the support; The first locking assembly comprises a first locking piece arranged at the lower end of the push rod, a first unlocking piece, a first reset spring and a first fixing piece arranged at the upper end of the lower rod; The first locking piece is driven to separate from the first fixing piece through the first unlocking piece, so that the push rod and the lower rod can be folded relative to each other; the first locking piece is driven to be clamped with the first fixing piece through the first reset spring, so that the unfolded push rod and the lower rod are kept locked; The second locking assembly comprises a second unlocking piece, a second locking piece and a second reset spring arranged at the lower end of the lower rod and a second fixing piece arranged at the upper end of the support; The second unlocking piece is driven by the rotating push rod to drive the second locking piece to separate from the second fixing piece, so that the lower rod and the support can be folded relative to each other; the second locking piece is driven to be clamped with the second fixing piece through the second reset spring, so that the unfolded lower rod and the support are kept locked.

2. A child's stroller frame assembly and locking mechanism according to claim 1, wherein: The push rod comprises a push handle and two upper rods connected to the ends of the push handle, the lower ends of the two upper rods are rotatably connected to the upper ends of the two lower rods, a sliding groove is formed along the length direction of the upper rod, the first locking piece is slidably connected with the sliding groove; A first lock hole is formed on the first fixing piece for clamping the first locking piece; The first unlocking piece comprises a first connecting rope, one end of the first connecting rope is fixedly connected with the first locking piece, the other end of the first connecting rope passes through the upper rod to the first pulling rope mechanism arranged in the middle of the push rod, the first connecting rope is driven by the first pulling rope mechanism to pull the first locking piece out of the first lock hole; The first pulling rope mechanism comprises an unlocking button, a rotating disc and a torsional spring, the rotating disc is fixedly connected with the first connecting rope, the rotating disc is rotated by the unlocking button, the rotating disc winds the first connecting rope to pull the first locking piece, the rotating disc is reversely rotated by the force of the torsional spring to unwind the first connecting rope; A first limiting groove is formed in the sliding groove, a supporting table is formed on one side of the bottom of the first locking piece, the supporting table is slidably connected with the first limiting groove; The first reset spring is arranged between the supporting table and the top end of the first limiting groove, when the upper rod and the lower rod are unfolded, the first reset spring pushes the first locking piece to be clamped with the first lock hole.

3. A child's stroller frame assembly and locking mechanism according to claim 2, wherein: The lower end of the upper rod is rotatably connected with the upper end of the lower rod through the first fixing piece, the first fixing piece and the lower rod are fixed relative to each other through a plurality of insertion grooves and insertion rods, the first fixing piece and the upper rod are rotatably connected through a convex ring and an annular groove.

4. A child's stroller frame assembly and locking mechanism according to claim 3, wherein: The convex ring and the inserting rod are fixed on two side faces of the first fixing member respectively, the first lock opening is arranged on the convex ring, the inserting groove is arranged on the inner side of the upper end of the lower rod, and the annular groove is arranged on the outer side of the lower end of the upper rod.

5. A child's stroller frame assembly and locking mechanism according to claim 2, wherein: The second unlocking member comprises a fixed shaft, a second pulling rope structure and a second connecting rope. The fixed shaft is coaxially arranged with the upper rotating end of the upper rod and detachably fixedly connected with the upper rod, and the fixed shaft penetrates the first fixing member and cooperates with the second pulling rope structure. Two ends of the second pulling rope are respectively connected with the second pulling rope structure and the second locking member, and the fixed shaft rotating with the upper rod drives the second pulling rope structure to wind the second connecting rope, so as to pull the second locking member to separate from the second fixing member.

6. A child's stroller frame assembly and locking mechanism according to claim 5, wherein: The second pulling rope structure and the second locking member are respectively arranged on the inner sides of the upper and lower rotating ends of the lower rod, and the second pulling rope structure comprises an unlocking member and a driving member. The unlocking member adopts a cam, and the cam is fixed opposite to the fixed shaft. The driving member comprises a driving frame arranged in a waist circular shape, and two horizontal planes of the driving frame in the up-down direction are respectively provided with a positioning protrusion and a rope joint for connecting the second connecting rope; a waist circular groove is arranged on one side face of the lower rod and slidably cooperates with the driving frame, and the outer sides of the two horizontal planes of the waist circular groove are respectively provided with a positioning groove corresponding to the positioning protrusion and the rope joint. The cam is arranged in the driving frame, and the driving frame has a horizontal frame surface in the frame, and the distance between the horizontal frame surface and the rotating center of the cam is smaller than the radius of the cam; when the cam rotates with the fixed shaft to abut the outer arc surface of the cam against the horizontal frame surface, the driving frame drives the second connecting rope to move upward, so that the second locking member separates from the second fixing member.

7. A child's stroller frame assembly and locking mechanism according to claim 6, wherein: The cam is provided with a special-shaped hole, one end of the fixed shaft is matched with the special-shaped hole, and the cam is fixed opposite to the fixed shaft through the special-shaped hole.

8. A child's stroller frame assembly and locking mechanism according to claim 6, wherein: The lower rod is provided with a mounting groove for accommodating the second locking member, one end of the second locking member is rotatably connected with the lower rod, and the other end rotates out of the second lock opening on the second fixing member under the driving of the second connecting rope moving upward; A compression cover is detachably connected to the outside of the mounting groove, the compression cover is provided with an arc-shaped hole, and the other end of the second locking member penetrates through the arc-shaped hole and rotates in the arc-shaped hole; The second reset spring is sleeved outside the second connecting rope, the mounting groove is provided with a second limiting groove at the top, and two ends of the second reset spring are respectively abutted against the top end of the second limiting groove and the groove body on the second locking member; when the lower rod and the support are unfolded, the second reset spring pushes the second locking member to be clamped with the second lock opening.

9. A child's stroller frame assembly and locking mechanism according to claim 5, wherein: The frame assembly further comprises a canopy rod for fixing a stroller canopy, canopy seats at two ends of the canopy rod are rotatably connected with lower ends of the two upper rods through the other end of the fixed shaft, the canopy seats are arranged outside the lower rod, the other end of the fixed shaft is a cylindrical body, the cylindrical body penetrates the lower rod and is rotatably connected with the lower rod and the canopy seats; The locking mechanism further comprises a third locking assembly for locking the awning rod and the upper rod; The third locking assembly comprises a disc coaxially fixed between both ends of the fixed shaft, the disc is located between the lower rod and the awning seat, a locking slot is formed on the disc and cooperates with a locking block on the awning seat, the awning seat drives the locking block to press into the locking slot under the drive of an elastic structure, so that the awning rod and the upper rod are locked.

10. A child's stroller frame assembly and locking mechanism according to claim 9, wherein: The disc is rotationally fitted between the lower rod and the awning seat, the locking slot and the locking block are respectively arranged at the edge of an annular protrusion and a circular groove which are rotationally fitted between the disc and the awning seat; The locking slot is provided with at least two pairs, and the locking block is provided with at least one pair, each pair of locking slots or locking blocks is symmetrically arranged on a diameter passing through the axis of the fixed shaft; The elastic structure comprises a awning pressing cover arranged outside the awning seat, the awning pressing cover is detachably fixedly connected with the cylinder, and a compression spring is arranged in a cavity formed between the awning pressing cover and the awning seat.

Images