Trolley frame with hand push rod capable of being used in reversing mode

Abstract

The utility model discloses a stroller frame with a hand push rod capable of being used in a reversing mode, which comprises a front foot rod, a rear foot rod, the hand push rod, a reversing driving piece, a hand push rod reversing locking mechanism and a hand push rod unlocking mechanism. The reversing driving piece is provided with two reversing driving locking parts and a reversing driving unlocking part located between the two reversing driving locking parts. Therefore, the directional locking state and the directional unlocking state of the front wheel set and the rear wheel set can be automatically switched only by operating the hand push rod to reverse, and meanwhile, the hand push rod reversing locking mechanism is arranged between the upper end of the rear foot rod and the lower end of the hand push rod so that the hand push rod can be locked in the forward working state or the reverse working state. The operation is simple and convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a baby carriage technical field especially a hand push rod reversible use's push car frame. BACKGROUND

[0002] In order to meet the different needs of the operator forward pushing and reverse pushing, the hand push rod of the child push car is usually set as reversible structure, and now in order to lock the hand push rod in the forward pushing state and the reverse pushing state, at least two groups of hand push rod locking mechanisms are usually needed to lock the hand push rod. For example, a hand push rod reversible positioning's push car frame with Chinese application number 202220309078.1 discloses that a first locking position is arranged on the front side of the seat assembly, a second locking position is arranged on the rear side of the bottom support frame or the seat assembly, and a locking part capable of locking the hand push rod in the first locking position or the second locking position is further arranged on the hand push rod. The structure design has the problems of not enough simple and compact structure.

[0003] In addition, some child push cars have locked the hand push rod in the forward position or the reverse position by arranging a tooth block in the joint between the hand push rod and the rear leg rod. Since the hand push rod reversing involves the switching between the directional rotation and the universal rotation of the front and rear wheels, the joint between the hand push rod, the front leg rod and the rear leg rod needs to be configured with a mechanism for switching the front and rear wheels between the directional rotation and the universal rotation when the hand push rod is flipped forward and backward. In order to achieve this purpose, Chinese patent 201721623380.X discloses that when the push rod frame is flipped between the forward and reverse directions, the front and rear wheels are switched between the directional rotation and the universal rotation by driving the sliding block to rotate. The structure scheme has many and complex joint parts, which increases the manufacturing and assembly costs.

[0004] Therefore, the utility model is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the defects of the prior art and provides a hand push rod reversible use's push car frame. The hand push rod is reversibly driven by the reversing driving part to reversibly lock or unlock the front wheel set and the rear wheel set, and the hand push rod reversing locking mechanism is arranged between the upper end of the rear leg rod and the lower end of the hand push rod to lock the hand push rod in the forward working state or the reverse working state. The utility model has the characteristics of simple and compact structure and easy operation.

[0006] The utility model is a hand push rod reversible use's push car frame, which has an unfolded use state and a folded use state, and comprises:

[0007] A front leg 1, a lower end of which is connected with a front wheel set 11, between which a front wheel orientation assembly 12 is arranged, the front wheel set 11 has a directional moving state and a universal moving state;

[0008] A rear leg 2, a lower end of which is connected with a rear wheel set 21, between which a rear wheel orientation assembly 22 is arranged, the rear wheel set 21 has a directional moving state and a universal moving state, an upper end of the rear leg 2 is rotatably connected with an upper end of the front leg 1;

[0009] A hand pushing rod 3, a lower end of which is rotatably connected with the upper end of the front leg 1 or the upper end of the rear leg 2, the hand pushing rod 3 is configured to have a forward working state of extending upward from front to back and a reverse working state of extending upward from back to front in its rotation stroke when the stroller frame is in an unfolded use state;

[0010] A reversing driving member 31, which is arranged in the lower part of the hand pushing rod 3 in a same motion, the reversing driving member 31 has two reversing driving locking portions 311 and a reversing driving unlocking portion 312 between the two reversing driving locking portions 311; when the hand pushing rod 3 is in the forward working state, the reversing driving unlocking portion 312 directly or indirectly cooperates with the front wheel orientation assembly 12 to release the directional moving state of the front wheel set 11, and one reversing driving locking portion 311 directly or indirectly cooperates with the rear wheel orientation assembly 22 to lock the rear wheel set 21 in the directional moving state; when the hand pushing rod 3 is in the reverse working state, the reversing driving unlocking portion 312 directly or indirectly cooperates with the rear wheel orientation assembly 22 to release the directional moving state of the rear wheel set 21, and the other reversing driving locking portion 311 directly or indirectly cooperates with the front wheel orientation assembly 12 to lock the front wheel set 11 in the directional moving state;

[0011] A hand pushing rod reversing locking mechanism 4, which is located between the rear leg 2 and the hand pushing rod 3 for locking the hand pushing rod 3 relative to the rear leg 2;

[0012] A hand pushing rod unlocking mechanism 5, which is located on the hand pushing rod 3 for linkage unlocking action of the hand pushing rod reversing locking mechanism 4.

[0013] As described above, a hand push rod reversible use stroller frame, the front wheel set 11 comprises a front connecting seat 111 pivoted with the lower end of the front leg 1; the front wheel orientation assembly 12 comprises a front wheel orientation lock portion 121 arranged on the front connecting seat 111 and a front wheel orientation lock piece 122 slidably arranged on the front leg 1 and capable of being locked with the front wheel orientation lock portion 121, and a front wheel orientation elastic piece 123 is arranged between the front wheel orientation lock piece 122 and the front leg 1 for driving the front wheel orientation lock piece 122 to be elastically reset; the front wheel orientation lock piece 122 is configured to be directly or indirectly driven by the reversing driving piece 31.

[0014] As described above, a hand push rod reversible use stroller frame, the front leg 1 and between the front wheel orientation lock piece 122 and the reversing driving piece 31 is arranged with a front wheel orientation control assembly 13, the front wheel orientation control assembly 13 comprises a front wheel control base 131 arranged in the front leg 1, a front wheel control slider 132 is slidably arranged on the front wheel control base 131, and the front wheel control slider 132 and the front wheel orientation lock piece 122 are linked through a front wheel linkage 133; the front wheel orientation control assembly 13 further comprises a front wheel control driving piece 134 slidably arranged in the front leg 1, the upper end of the front wheel control driving piece 134 is in abutting fit with the reversing driving piece 31, and the lower end of the front wheel control driving piece 134 is in abutting fit with the upper end of the front wheel control slider 132.

[0015] As described above, a hand push rod reversible use stroller frame, the hand push rod reversing lock mechanism 4 comprises a reversing lock gear 42 slidably arranged between the upper end of the rear leg 2 and the lower end of the hand push rod 3 and capable of being simultaneously clamped into the reversing lock gear 41 on the upper end of the rear leg 2 and the lower end of the hand push rod 3, and reversing lock gears 41 are arranged on the upper end of the rear leg 2 and the lower end of the hand push rod 3, respectively, the reversing lock gear 42 and the upper end of the rear leg 2 are provided with a reversing lock elastic piece 43 for driving the reversing lock gear 42 to be elastically reset, the reversing lock gear 42 and the lower end of the hand push rod 3 are rotatably provided with a reversing driving rotating block 44, the reversing driving rotating block 44 and the lower end of the hand push rod 3 are respectively provided with a reversing driving inclined portion 45 capable of being in abutting fit with each other during the rotation of the reversing driving rotating block 44 to make the reversing driving rotating block 44 push the reversing lock gear 42 to be unlocked; the reversing driving rotating block 44 is configured to be linked with the unlocking action of the hand push rod unlocking mechanism 5.

[0016] As described above, a hand push rod reversible use stroller frame, the upper end of the front leg 1 and the upper end of the rear leg 2 are provided with a front leg locking mechanism 6 for locking each other, the front leg locking mechanism 6 is configured to be linked with the unlocking action of the hand push rod 3 when the hand push rod 3 is rotated and folded to a preset position relative to the rear leg 2.

[0017] As described above, the push handle reversible use stroller frame, the front leg locking mechanism 6 is configured to be linked with the unlocking action of the push handle 3 when the push handle 3 is rotated to the preset position relative to the rear leg 2, and is configured to be linked with the unlocking action of the push handle 3 when the push handle 3 is rotated to the preset position relative to the rear leg 2.

[0018] As described above, the push handle reversible use stroller frame, the front leg locking mechanism 6 includes the front leg locking gear 62 which is respectively arranged on the upper end of the front leg 1 and the upper end of the rear leg 2 and can be simultaneously clamped into the front leg locking gear 61 on the upper end of the front leg 1 and the upper end of the rear leg 2, and the front leg locking elastic element 63 which is arranged between the upper end of the front leg 1 and the front leg locking gear 62 and is used for driving the elastic reset of the front leg locking gear 62, and the front leg pushing sliding seat 64 which is slidably arranged between the upper end of the rear leg 2 and the front leg locking gear 62 and is used for pushing the corresponding sliding action of the front leg locking gear 62, and the front leg pushing protruding block 641 which is arranged on the side wall of the rear leg 2 and extends to the side of the push handle 3, and the front leg driving unlocking inclined part 65 which is arranged at the lower end of the push handle 3 and is used for abutting and cooperating with the front leg pushing protruding block 641 when the push handle 3 is rotated to the preset position relative to the rear leg 2.

[0019] As described above, the push handle reversible use stroller frame, the front leg driving unlocking inclined part 65 includes the forward driving unlocking inclined part 651 and the reverse driving unlocking inclined part 652 which is opposite to the direction of the forward driving unlocking inclined part 651.

[0020] As described above, the push handle reversible use stroller frame, the upper end of the rear leg 2 is provided with the protruding guide through hole 20 which is used for guiding the sliding path of the front leg pushing protruding block 641.

[0021] As described above, the push handle reversible use stroller frame, the upper end of the front leg 1 and the upper end of the rear leg 2 are provided with the guide mechanism 7 which includes the guide protruding block 71 and the guide arc groove 72 which are arranged between the upper end of the front leg 1 and the upper end of the rear leg 2 and can be guided and cooperated with each other.

[0022] As described above, the push handle reversible use stroller frame, the reversing driving part 31 is integrally formed with the lower part of the push handle 3, and the reversing driving locking part 311 and the reversing driving unlocking part 312 are eccentric to the pivot shaft of the lower end of the push handle 3.

[0023] Compared with the prior art, the push handle reversible use stroller frame has the following advantages:

[0024] 1. The hand push rod reversing locking mechanism is arranged between the upper end of the rear leg and the lower end of the hand push rod, and the reversing driving part is arranged at the lower part of the hand push rod, in the unlocking and reversing process of the hand push rod, the reversing driving part moves together with the hand push rod and drives the front wheel set and the rear wheel set to be correspondingly locked or unlocked, and after the hand push rod is reversed to the position, the hand push rod reversing locking mechanism is locked, so that the structure of the utility model is more simple and compact, and the front wheel set and the rear wheel set can be correspondingly locked or unlocked in quick response.

[0025] 2. The reversing driving part is integrally formed with the lower part of the hand push rod, the number of parts is optimized, and the structure is simplified, and the manufacturing and assembly costs are reduced.

[0026] 3. In the utility model, the reversing driving part adopts a cam structure, no matter in the forward working state or in the reverse working state, the front wheel directional assembly and the rear wheel directional assembly always keep abutting with the reversing driving part, so that when the reversing driving part rotates, the front wheel directional assembly and the rear wheel directional assembly can be quickly responded by corresponding movement, and the effect of response is mainly ensured by the profile progress of the reversing driving part, and the problems of mutual linkage of multiple parts, transmission error caused by assembly and manufacturing, and influence on speed and effect are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0027] The specific implementation of the utility model will be further described in combination with the drawings, in which:

[0028] Figure 1 It is a three-dimensional structure schematic view of the utility model in the unfolded use state.

[0029] Figure 2 It is a side view structure schematic view of the utility model in the unfolded use state.

[0030] Figure 3 It is a side view structure schematic view of the utility model in the folding process.

[0031] Figure 4 It is a side view structure schematic view of the utility model in the folding process.

[0032] Figure 5 It is a side view structure schematic view of the utility model in the folded use state.

[0033] Figure 6 It is a side view structure schematic view of the utility model in the folded use state.

[0034] Figure 7 It is a structure schematic view of the utility model in the forward working state of the hand push rod, the universal movement state of the front wheel set and the directional movement state of the rear wheel set.

[0035] Figure 8 It is the structural schematic view of the hand pushing rod in reverse working state, the front wheel group in directional moving state and the rear wheel group in universal moving state in the utility model.

[0036] Figure 9 It is the explosion structural schematic view one of the utility model.

[0037] Figure 10 It is the explosion structural schematic view two of the utility model.

[0038] Figure 11 It is the structural schematic view of the lower end of the hand pushing rod in the utility model.

[0039] Figure 12 It is the structural schematic view of the front wheel directional assembly in the utility model.

[0040] Figure 13 It is the structural schematic view of the rear wheel directional assembly in the utility model.

CONCRETE IMPLEMENTATION

[0041] The embodiment of the utility model will be explained in detail in combination with the drawings.

[0042] As Figures 1-13As shown, the utility model discloses a hand push rod reversible use's trolley frame, the trolley frame has unfolded use state and folding use state, including front leg 1, rear leg 2, hand push rod 3, reversing drive piece 31, hand push rod reversing locking mechanism 4 and hand push rod unlocking mechanism 5. The front leg 1 lower end is connected with front wheel group 11, be equipped with front wheel directional assembly 12 between front wheel group 11 and front leg 1, front wheel group 11 has directional moving state and universal moving state;The rear leg 2 lower end is connected with rear wheel group 21, be equipped with rear wheel directional assembly 22 between rear wheel group 21 and rear leg 2, rear wheel group 21 has directional moving state and universal moving state, the rear leg 2 upper end is rotatably connected with front leg 1 upper end;Hand push rod 3 lower end is rotatably connected with front leg 1 upper end or rear leg 2 upper end, hand push rod 3 is configured when trolley frame is in unfolded use state, hand push rod 3 has the positive direction working state of self front to back up-tilt extension and the reverse working state of self rear to front up-tilt extension on its rotating stroke;Reversing drive piece 31 is same in motion and is located hand push rod 3 lower part, reversing drive piece 31 has two reversing drive locking parts 311 and reversing drive unlocking part 312 between two reversing drive locking parts 311;When hand push rod 3 is in positive direction working state, reversing drive unlocking part 312 directly or indirectly cooperates with front wheel directional assembly 12 and removes the directional moving state of front wheel group 11, and one reversing drive locking part 311 directly or indirectly cooperates with rear wheel directional assembly 22 and locks rear wheel group 21 in directional moving state;When hand push rod 3 is in reverse working state, reversing drive unlocking part 312 directly or indirectly cooperates with rear wheel directional assembly 22 and removes the directional moving state of rear wheel group 21, and another reversing drive locking part 311 directly or indirectly cooperates with front wheel directional assembly 12 and locks front wheel group 11 in directional moving state;Hand push rod reversing locking mechanism 4 is located between rear leg 2 and hand push rod 3 for locking hand push rod 3 relative to rear leg 2;Hand push rod unlocking mechanism 5 is located on hand push rod 3 for the unlocking action of linkage hand push rod reversing locking mechanism 4.When operating hand push rod switches from positive direction working state to reverse working state, operating hand push rod unlocking mechanism 5 linkage hand push rod reversing locking mechanism 4's unlocking action to remove the locking state of hand push rod relative to rear leg, then operating hand push rod relative to rear leg is turned over to reverse working state, in the above-mentioned hand push rod turning over process, reversing drive unlocking part 312 directly or indirectly cooperates with rear wheel directional assembly 22 and removes the directional moving state of rear wheel group 21, correspondingly one reversing drive locking part 311 directly or indirectly cooperates with front wheel directional assembly 12 and locks front wheel group 11 in directional moving state, at this moment, rear wheel group becomes front wheel group and uses, front wheel group becomes rear wheel group and uses, Figure 8 As shown, for this, the utility model only needs to operate hand push rod to reverse to automatically realize the directional locking and directional unlocking state switching of front wheel group and rear wheel group, has the characteristics that operation is simple.

[0043] In addition, the hand pushing rod reversing locking mechanism is arranged between the upper end of the rear leg rod and the lower end of the hand pushing rod, and the reversing driving member is arranged at the lower part of the hand pushing rod, in the hand pushing rod unlocking and reversing process, the reversing driving member moves together with the hand pushing rod and drives the front wheel set and the rear wheel set to be locked or unlocked, and after the hand pushing rod is reversed to the position, the hand pushing rod reversing locking mechanism is locked, so that the structure of the utility model is more simple and compact, and the front wheel set and the rear wheel set can be quickly and responsively locked or unlocked.

[0044] In the utility model, the reversing driving member adopts a cam structure, no matter in the forward working state or in the reverse working state, the front wheel directional assembly and the rear wheel directional assembly always keep abutting with the reversing driving member, so that the reversing driving member can quickly respond to the corresponding movement of the front wheel directional assembly and the rear wheel directional assembly when rotating, and mainly relies on the profile progress of the reversing driving member to ensure the response effect, compared with the structure in the prior art, the structure of the utility model avoids the problems of mutual linkage of multiple parts, transmission speed and effect influenced by the errors existing in assembly and manufacturing.

[0045] As shown in Figure 12 In order to lock reliably and unlock conveniently, the front wheel set 11 comprises a front connecting seat 111 which is pivoted with the lower end of the front leg rod 1, the front wheel directional assembly 12 comprises a front wheel directional locking part 121 arranged on the front connecting seat 111 and a front wheel directional locking member 122 which is slidably arranged on the front leg rod 1 and can be locked with the front wheel directional locking part 121, and the front wheel directional locking member 122 and the front leg rod 1 are provided with a front wheel directional elastic member 123 which is used for driving the front wheel directional locking member 122 to be elastically reset, and the front wheel directional locking member 122 is arranged to be directly or indirectly driven by the reversing driving member 31. As shown in Figure 13 In the utility model, the structure of the rear wheel directional assembly 22 is the same as that of the front wheel directional assembly 12, which will not be described here.

[0046] As shown in Figure 12As shown, in order to linkage unlock convenient, the front leg 1 and between the front wheel orientation lock piece 122 and the reversing drive piece 31 is equipped with a front wheel orientation control assembly 13, the front wheel orientation control assembly 13 includes the front wheel control base 131 equipped in the front leg 1, the front wheel control base 131 on slidably equipped with front wheel control slider 132, the front wheel control slider 132 and the front wheel orientation lock piece 122 through the front wheel linkage piece 133 linkage cooperation;The front wheel orientation control assembly 13 further includes the front wheel control drive piece 134 slidably equipped in the front leg 1, the front wheel control drive piece 134 upper end and the reversing drive piece 31 abutment cooperation, the front wheel control drive piece 134 lower end and the front wheel control slider 132 upper end abutment cooperation.In the embodiment, the front wheel linkage piece 133 is linkage pull rope and its around the front wheel control base 131, as Figure 7 、 8 ,12 shows.When the hand push rod switches to the positive working state process, the reversing drive unlocking portion 312 drives the front wheel control drive piece 134 and pushes the front wheel control slider 132 to slide downwards relative to the front leg 1, the front wheel control slider 132 drives the upper part of the front wheel linkage piece 133 to move downwards relative to the front wheel control base 131, the lower part of the front wheel linkage piece 133 drives the front wheel orientation lock piece 122 to move upwards relative to the front wheel control base 131, so that the front wheel orientation lock piece 122 and the front wheel orientation lock portion 121 are separated and the directional movement state of the front wheel group is cancelled, at this moment, the front wheel group is in universal movement state, as Figure 7 As shown.

[0047] As shown in Figure 7 、 8 ,13, the rear leg 2 and between the rear wheel orientation assembly 22 and the reversing drive piece 31 is equipped with a rear wheel orientation control assembly 23.In the utility model, the structure of the rear wheel orientation control assembly 23 is same with the structure of the front wheel orientation control assembly 13, which will not be described here.

[0048] As shown in Figure 9 、 10As shown, in order to lock reliably, the hand lever reversing locking mechanism 4 includes reversing locking tooth grooves 41 respectively provided on the upper end of the rear leg 2 and the lower end of the hand lever 3, and a reversing locking gear 42 slidably provided between the upper end of the rear leg 2 and the lower end of the hand lever 3 and capable of being simultaneously clamped into the reversing locking tooth grooves 41 on the upper end of the rear leg 2 and the lower end of the hand lever 3, a reversing locking elastic member 43 is provided between the reversing locking gear 42 and the upper end of the rear leg 2 for driving the reversing locking gear 42 to elastically reset, a reversing drive rotating block 44 is rotatably provided between the reversing locking gear 42 and the lower end of the hand lever 3, and the reversing drive rotating block 44 and the lower end of the hand lever 3 are respectively provided with reversing drive inclined portions 45 capable of abutting and cooperating with each other during rotation of the reversing drive rotating block 44 to make the reversing drive rotating block 44 push the reversing locking gear 42 to corresponding unlocking action; the reversing drive rotating block 44 is configured to be linked with the unlocking action of the hand lever unlocking mechanism 5. The hand lever unlocking mechanism 5 includes but is not limited to a hand lever unlocking button movably provided on the hand lever 3, and the hand lever 3 is provided with a hand lever unlocking linkage for connecting the hand lever unlocking button and the reversing drive rotating block 44. When unlocking, the hand lever unlocking button is pressed, the hand lever unlocking button drives the reversing drive rotating block 44 to rotate through the hand lever unlocking linkage, at this moment, the reversing drive rotating block 44 pushes the reversing locking gear 42 to slide to the side of the rear leg 2 under the abutting and cooperating of the reversing drive inclined portions 45 located on the reversing drive rotating block 44 and the lower end of the hand lever 3, until the reversing locking gear 42 is separated from the reversing locking tooth grooves 41 on the lower end of the hand lever 3, thereby releasing the locking state of the hand lever 3 relative to the rear leg 2.

[0049] As shown in Figure 9 , 10 In order to lock reliably and unlock conveniently, the upper end of the front leg 1 and the upper end of the rear leg 2 are provided with a front leg locking mechanism 6 for locking each other, and the front leg locking mechanism 6 is configured to be linked with the unlocking action of the hand lever 3 when the hand lever 3 is rotated and folded to a preset position relative to the rear leg 2.

[0050] As shown in Figures 9-11 In order to realize the folding function of the hand lever in both forward and reverse working states, the front leg locking mechanism 6 is configured to be linked with the unlocking action of the hand lever 3 when the hand lever 3 is rotated and folded to a preset position relative to the rear leg 2, and is also configured to be linked with the unlocking action of the hand lever 3 when the hand lever 3 is rotated and folded to a preset position relative to the rear leg 2.

[0051] As shown in Figures 9-11As shown, in order to lock reliably and unlock conveniently, the front leg locking mechanism 6 includes front leg locking tooth grooves 61 respectively arranged on the upper end of the front leg rod 1 and the upper end of the rear leg rod 2, and a front leg locking gear 62 slidably arranged between the upper end of the front leg rod 1 and the upper end of the rear leg rod 2 and capable of being simultaneously clamped into the front leg locking tooth grooves 61 on the upper end of the front leg rod 1 and the upper end of the rear leg rod 2, a front leg locking elastic member 63 is arranged between the front leg locking gear 62 and the upper end of the front leg rod 1 for driving the front leg locking gear 62 to elastically reset, a front leg pushing sliding seat 64 is slidably arranged between the front leg locking gear 62 and the upper end of the rear leg rod 2 for pushing the front leg locking gear 62 to slide correspondingly, a front leg pushing protruding block 641 is arranged on one side wall of the front leg pushing sliding seat 64 towards the rear leg rod 2, one end of the front leg pushing protruding block 641 penetrates through the upper end of the rear leg rod 2 and extends to the side of the hand pushing rod 3, and the lower end of the hand pushing rod 3 is provided with a front leg driving unlocking inclined part 65 for abutting and cooperating with the front leg pushing protruding block 641 when the hand pushing rod 3 is rotated and folded to a preset position relative to the rear leg rod 2. The front leg driving unlocking inclined part 65 includes a forward driving unlocking inclined part 651 and a reverse driving unlocking inclined part 652 opposite to the forward driving unlocking inclined part 651 in direction. When the hand pushing rod is in a forward working state and the stroller is folded, the hand pushing rod is turned downward relative to the rear leg rod, the forward driving unlocking inclined part 651 drives the front leg pushing sliding seat 64 to push the front leg locking gear 62 to slide to the side of the front leg rod 1 through the front leg pushing protruding block 641 until the front leg locking gear 62 is separated from the front leg locking tooth grooves 61 on the upper end of the rear leg rod 2, so that the locking state of the front leg rod 1 relative to the rear leg rod 2 is released, and the front leg rod 1 is operated to rotate and fold to the side of the rear leg rod 2, as shown in Figure 5 When the hand pushing rod is in a reverse working state and the stroller is folded, the hand pushing rod is turned downward relative to the front leg rod, the reverse driving unlocking inclined part 652 drives the front leg pushing sliding seat 64 to push the front leg locking gear 62 to slide to the side of the front leg rod 1 through the front leg pushing protruding block 641 until the front leg locking gear 62 is separated from the front leg locking tooth grooves 61 on the upper end of the rear leg rod 2, so that the locking state of the front leg rod 1 relative to the rear leg rod 2 is released, and the front leg rod 1 is operated to rotate and fold to the side of the rear leg rod 2, as shown in Figure 6 .

[0052] As shown in Figure 9 , 10 In order to make the front leg pushing sliding seat 64 slide smoothly, the upper end of the rear leg rod 2 is provided with a protruding guide through hole 20 for the front leg pushing protruding block 641 to penetrate and guide the sliding path thereof.

[0053] As shown in Figures 9-11 In order to ensure that the stroller frame is folded and unfolded smoothly and stably, a guide mechanism 7 is arranged between the upper end of the front leg rod 1 and the upper end of the rear leg rod 2, the guide mechanism 7 includes guide protrusions 71 and guide arc grooves 72 which are arranged between the upper end of the front leg rod 1 and the upper end of the rear leg rod 2 and can guide each other.

[0054] As shown in Figure 11 The reversing driving member 31 is integrally formed with the lower part of the hand lever 3, effectively optimizing the number of parts and simplifying the structure, reducing manufacturing and assembly costs.

[0055] As shown in Figure 11 In order to facilitate better linkage of the front wheel directional assembly and the rear wheel directional assembly, the reversing driving locking part 311 and the reversing driving unlocking part 312 are eccentrically arranged on the pivot shaft at the lower end of the hand lever 3.

[0056] As shown in Figures 1-6 The upper end of the front leg 1 is provided with a seat frame adaptive connecting member for adaptive connection with the seat frame.

Claims

1. A hand-propelled pushchair frame which is reversible in use, the pushchair frame having an extended use condition and a collapsed use condition, characterised in that The utility model relates to a stroller frame structure, comprising: a front leg rod (1) having a front wheel set (11) connected to a lower end of the front leg rod (1), and a front wheel orientation assembly (12) provided between the front wheel set (11) and the front leg rod (1), the front wheel set (11) having a directional movement state and a universal movement state; a rear leg rod (2) having a rear wheel set (21) connected to a lower end of the rear leg rod (2), and a rear wheel orientation assembly (22) provided between the rear wheel set (21) and the rear leg rod (2), the rear wheel set (21) having a directional movement state and a universal movement state, and an upper end of the rear leg rod (2) being rotatably connected to an upper end of the front leg rod (1); a hand push rod (3) having a lower end rotatably connected to the upper end of the front leg rod (1) or the upper end of the rear leg rod (2), the hand push rod (3) being configured to have a forward working state extending upward from front to back and a reverse working state extending upward from back to front in a rotation stroke of the hand push rod (3) when the stroller frame is in an unfolded use state; a reversing driving member (31) provided in a lower part of the hand push rod (3) in a same motion, the reversing driving member (31) having two reversing driving locking portions (311) and a reversing driving unlocking portion (312) located between the two reversing driving locking portions (311); when the hand push rod (3) is in the forward working state, the reversing driving unlocking portion (312) directly or indirectly cooperates with the front wheel orientation assembly (12) to release the directional movement state of the front wheel set (11), and one reversing driving locking portion (311) directly or indirectly cooperates with the rear wheel orientation assembly (22) to lock the rear wheel set (21) in the directional movement state; when the hand push rod (3) is in the reverse working state, the reversing driving unlocking portion (312) directly or indirectly cooperates with the rear wheel orientation assembly (22) to release the directional movement state of the rear wheel set (21), and the other reversing driving locking portion (311) directly or indirectly cooperates with the front wheel orientation assembly (12) to lock the front wheel set (11) in the directional movement state; a hand push rod reversing locking mechanism (4) located between the rear leg rod (2) and the hand push rod (3) for locking the hand push rod (3) relative to the rear leg rod (2); a hand push rod unlocking mechanism (5) located on the hand push rod (3) for linking the unlocking action of the hand push rod reversing locking mechanism (4).

2. A hand-propelled bar reversible stroller frame according to claim 1, wherein The reversing driving member (31) is integrally formed with the lower part of the hand push rod (3), and the reversing driving locking portions (311) and the reversing driving unlocking portion (312) are eccentric to a pivoting shaft of the lower end of the hand push rod (3).

3. A hand-propelled bar reversible-use cart frame according to claim 1 or 2, characterized in that The front wheel set (11) comprises a front connecting seat (111) pivoted to the lower end of the front leg rod (1). The front wheel orientation assembly (12) comprises a front wheel orientation lock portion (121) arranged on the front connecting seat (111) and a front wheel orientation lock piece (122) slidably arranged on the front leg rod (1) and capable of being locked with the front wheel orientation lock portion (121), and a front wheel orientation elastic piece (123) is arranged between the front wheel orientation lock piece (122) and the front leg rod (1) for driving the front wheel orientation lock piece (122) to be elastically reset; the front wheel orientation lock piece (122) is configured to be directly or indirectly driven by the reversing driving piece (31).

4. A hand-propelled bar reversible stroller frame according to claim 3, wherein A front wheel orientation control assembly (13) is arranged in the front leg rod (1) and between the front wheel orientation lock piece (122) and the reversing driving piece (31), the front wheel orientation control assembly (13) comprises a front wheel control base (131) arranged in the front leg rod (1), a front wheel control slider (132) is slidably arranged on the front wheel control base (131), and the front wheel control slider (132) and the front wheel orientation lock piece (122) are linked through a front wheel linkage (133); the front wheel orientation control assembly (13) further comprises a front wheel control driving piece (134) slidably arranged in the front leg rod (1), the upper end of the front wheel control driving piece (134) is in abutting cooperation with the reversing driving piece (31), and the lower end of the front wheel control driving piece (134) is in abutting cooperation with the upper end of the front wheel control slider (132).

5. A hand-propelled bar reversible-use cart frame according to claim 1 or 2, characterized in that The hand pushing rod reversing lock mechanism (4) comprises reversing lock gear slots (41) arranged on the upper end of the rear leg rod (2) and the lower end of the hand pushing rod (3) respectively and a reversing lock gear (42) slidably arranged between the upper end of the rear leg rod (2) and the lower end of the hand pushing rod (3) and capable of being clamped into the reversing lock gear slots (41) on the upper end of the rear leg rod (2) and the lower end of the hand pushing rod (3) at the same time, a reversing lock elastic piece (43) is arranged between the reversing lock gear (42) and the upper end of the rear leg rod (2) for driving the reversing lock gear (42) to be elastically reset, a reversing driving rotating block (44) is rotatably arranged between the reversing lock gear (42) and the lower end of the hand pushing rod (3), and the reversing driving rotating block (44) and the lower end of the hand pushing rod (3) are respectively provided with reversing driving inclined portions (45) capable of being in abutting cooperation with each other during rotation of the reversing driving rotating block (44) to make the reversing driving rotating block (44) push the reversing lock gear (42) to be correspondingly unlocked); the reversing driving rotating block (44) is configured to be linked with the unlocking action of the hand pushing rod unlocking mechanism (5).

6. A hand-propelled bar reversible-use cart frame according to claim 1 or 2, characterized in that A front leg locking mechanism (6) is arranged between the upper end of the front leg rod (1) and the upper end of the rear leg rod (2) for locking them with each other, and the front leg locking mechanism (6) is configured to be linked with the unlocking action of the hand pushing rod (3) when the hand pushing rod (3) is rotated and folded to a preset position relative to the rear leg rod (2).

7. A hand-propelled bar reversible stroller frame according to claim 6, wherein The front leg locking mechanism (6) is configured to be linked with the unlocking action of the hand pushing rod (3) when the hand pushing rod (3) is rotated and folded to a preset position relative to the rear leg rod (2) in a rear direction, and is also configured to be linked with the unlocking action of the hand pushing rod (3) when the hand pushing rod (3) is rotated and folded to a preset position relative to the rear leg rod (2) in a front direction.

8. A hand-propelled bar reversible stroller frame according to claim 7, wherein The front leg locking mechanism (6) comprises a front leg locking gear (62) arranged on the upper end of the front leg rod (1) and the upper end of the rear leg rod (2) respectively and slidably arranged between the upper end of the front leg rod (1) and the upper end of the rear leg rod (2) and capable of being clamped into the front leg locking gear (62) on the upper end of the front leg rod (1) and the upper end of the rear leg rod (2) simultaneously, a front leg locking elastic member (63) arranged between the front leg locking gear (62) and the upper end of the front leg rod (1) for driving the front leg locking gear (62) to be elastically reset, and a front leg pushing sliding seat (64) slidably arranged between the front leg locking gear (62) and the upper end of the rear leg rod (2) for pushing the front leg locking gear (62) to slide, wherein a front leg pushing protrusion (641) is arranged on the side wall of the front leg pushing sliding seat (64) towards the rear leg rod (2), one end of the front leg pushing protrusion (641) penetrates through the upper end of the rear leg rod (2) and extends to the side of the hand pushing rod (3), and the lower end of the hand pushing rod (3) is provided with a front leg driving unlocking inclined part (65) for abutting and cooperating with the front leg pushing protrusion (641) when the hand pushing rod (3) is rotated and folded to a preset position relative to the rear leg rod (2).

9. A hand-propelled bar reversible stroller frame according to claim 8, wherein The upper end of the rear leg rod (2) is provided with a protruding guide through hole (20) for guiding the sliding path of the front leg pushing protrusion (641).

10. A hand-propelled bar reversible stroller frame according to claim 8, wherein The upper end of the front leg rod (1) and the upper end of the rear leg rod (2) are provided with a guide mechanism (7), and the guide mechanism (7) comprises a guide protrusion (71) and a guide arc groove (72) which are arranged between the upper end of the front leg rod (1) and the upper end of the rear leg rod (2) and can be guided and matched with each other.

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