Folding stroller

Abstract

The present invention discloses a folding baby stroller, which comprises a rear frame, the bottom of which is connected with wheels; a front frame, which is connected to the rear frame so as to be movable forward and backward; a front side rod, the front part of which is rotatably connected to the rear frame, and the rear part of which is connected with a side wheel assembly; a rear side rod, the outer end of which is rotatably connected to the front side rod, and the inner end of which is rotatably connected to the front frame; the folding baby stroller has an unfolded state and a folded state, and when it is in the unfolded state and the folded state, the outer end of the rear side rod is located in front of the inner end. The folding baby stroller of the present invention, through its structural design, allows the rear side rod to drive the front side rod to rotate backward when the baby stroller is folded, so that the folding operation is very smooth, no jamming occurs, and compared with the prior art, the size of the whole vehicle after folding is smaller.

Description

Technical Field

[0001] The invention relates to a foldable baby carriage, belonging to children's toys. Background Art

[0002] A foldable baby stroller is a toy driven by children, generally including a body, wheels, seats, etc., driven by a motor or driven by a child's pedals, and a transmission mechanism to drive the wheels to rotate. And for the convenience of carrying and storage, it is designed to be a foldable structure. Baby strollers usually have a sliding function, and the foldable baby strollers with a sliding function are mostly vertical structures. There are few baby strollers with a sitting structure that can be folded in the prior art. The invention patent with application number 201811193988.2 discloses a foldable baby stroller, which is a sitting structure and can be folded, but it also has disadvantages. The folding baby stroller in this invention patent includes a rear frame, a front frame, a front side rod and a rear side rod. The front frame is connected to the rear frame so as to be movable forward and backward. The front part of the front side rod is rotationally connected to the front frame, the outer end part of the rear side rod is rotationally connected to the rear part of the front side rod, and the inner end part of the rear side rod is rotationally connected to the rear frame. When folding, the front frame is pushed backward, so that the front part of the front side rod moves backward and the front side rod rotates backward as a whole, thereby driving the rear side rod to rotate. This structural arrangement may lead to the following disadvantages: first, when the stroller is in the unfolded state, the outer end of the rear rod is in front of the inner end, and in the folded state, the outer end of the rear rod is rotated to the rear of the inner end. Then, during the folding process, when the front rod rotates backward and drives the rear rod, the rear rod will first give the front rod a forward reaction force, thereby hindering the front rod from rotating backward, and the obstacle will not disappear until the outer end of the rear rod rotates to the rear of the inner end. This causes the folding operation of the stroller to be stuck and not smooth enough. Second, due to the limitations of this structure, during the folding process, the front rod can only move in a very limited range during the entire process of rotating and approaching the rear frame, thereby affecting the movement range of the front frame, resulting in a larger front and rear size of the entire vehicle. Summary of the invention

[0003] To solve the above problems, an object of the present invention is to provide a foldable baby stroller.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: a foldable baby stroller, which comprises

[0005] a rear frame, the bottom of which is connected to wheels;

[0006] A front frame connected to the rear frame so as to be movable forward and backward;

[0007] A front side rod, the front portion of which is rotatably connected to the rear frame, and the rear portion of which is connected to a side wheel assembly;

[0008] A rear side rod, an outer end of which is rotatably connected to the front side rod, and an inner end of which is rotatably connected to the front frame;

[0009] The foldable baby stroller has an unfolded state and a folded state. When the foldable baby stroller is in the unfolded state and the folded state, the outer end of the rear side rod is located in front of the inner end.

[0010] Furthermore, the foldable baby stroller further comprises a locking mechanism capable of locking the relative position between the front frame and the rear frame in the unfolded state and the folded state respectively, and an unlocking mechanism capable of unlocking the locking mechanism by operating the locking mechanism.

[0011] Furthermore, the locking mechanism includes at least two locking grooves provided on the rear frame, and at least one locking element movably arranged on the front frame and detachably connected to the locking grooves. When the folding stroller is in the unfolded state, the locking element is connected to one locking groove, and when the folding stroller is in the folded state, the locking element is connected to the other locking groove.

[0012] Furthermore, the lock piece is arranged at the rear part of the front frame. Furthermore, the unlocking mechanism is arranged at the front part of the front frame to facilitate the unlocking operation.

[0013] Furthermore, the unlocking mechanism includes a slide groove arranged on the front frame, a joint slidably arranged in the slide groove, a traction member having one end fixedly connected to the joint and the other end fixedly connected to the locking member, and an unlocking member movably arranged on the front frame, wherein the unlocking member has an inclined surface that can slide the joint by slidingly contacting the joint.

[0014] Furthermore, the unlocking member has an unlocking position and a locking position, and a movable button with two working positions is provided on the front frame, one of the button and the unlocking member has a groove, and when the button is in the first position, the other of the button and the unlocking member is staggered from the groove position, and the button and the unlocking member are abutted against each other so that the unlocking member is restricted in the locking position, and when the button is in the second position, the other of the button and the unlocking member corresponds to the groove position, and when the button is in the second position and the unlocking member is in the unlocking position, the other of the button and the unlocking member enters the groove.

[0015] Furthermore, the movement directions of the button and the unlocking member are perpendicular.

[0016] Furthermore, the front frame is inserted into the rear frame from front to rear, a sliding sleeve is slidably connected to the rear frame, the inner end of the rear side rod is rotatably connected to the sliding sleeve through a rotating shaft, a guide groove for the rotating shaft to move therein is opened on the rear frame, and the rotating shaft passes through the sliding sleeve to connect the front frame and the rear frame together.

[0017] Furthermore, there are two front side rods and two rear side rods, which are symmetrically arranged on the left and right sides of the front frame and the rear frame, and the two rear side rods are rotatably connected to the above-mentioned sliding sleeves.

[0018] Furthermore, a front wheel assembly is connected to the lower part of the front portion of the rear frame, a rear wheel assembly is connected to the lower part of the rear portion of the rear frame, and a bottom surface of the side wheel assembly is higher than a bottom surface of the front wheel assembly and the rear wheel assembly.

[0019] Furthermore, the rear rod is arc-shaped, and the arc is arched toward the front.

[0020] Furthermore, when the foldable stroller is in the unfolded state, the front frame is unfolded relative to the rear frame, and the rear part of the front side rod is away from the rear frame; when the foldable stroller is in the folded state, the front frame and the rear frame slide and contract, the rear end of the front side rod is close to the rear frame, and the inner end of the rear side rod slides backward relative to the rear frame as the front frame slides relative to the rear frame.

[0021] The present invention also provides another technical solution: a foldable baby stroller, which comprises

[0022] a rear frame, the bottom of which is connected to wheels;

[0023] A front frame connected to the rear frame so as to be movable forward and backward;

[0024] A front side bar, the front portion of which is rotatably connected to one of the rear frame and the front frame, and the rear portion of the front side bar is connected to a side wheel assembly;

[0025] The rear side rod has an outer end portion rotatably connected to the front side rod, and an inner end portion of the rear side rod is rotatably connected to one of the front frame and the rear frame that is not connected to the front side rod, and the inner end portion of the rear side rod drives the front side rod to approach or move away from the rear frame while the front frame and the rear frame slide relative to each other.

[0026] By adopting the above technical solution, the foldable baby stroller of the present invention has a structural design, so that when the baby stroller is folded, the rear side rod drives the front side rod to rotate toward the rear frame, so that the front side rod and the rear side rod just close the two sides of the frame, thereby minimizing the increase in the width of the side, and making the folding operation very smooth without any jamming. In addition, compared with the prior art, the front frame is closer to the rear frame, and the size of the entire vehicle is smaller after folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attached Figure 1 It is a schematic structural diagram of a foldable baby stroller in an unfolded state according to an embodiment of the present invention;

[0028] Attached Figure 2 For attachment Figure 1 The structural schematic diagram of the foldable baby stroller shown is in the folded state;

[0029] Attached Figure 3 For attachment Figure 1 The structure diagram of the foldable baby stroller after the shell is installed is shown;

[0030] Attached Figure 4 For attachment Figure 2 The structure diagram of the foldable baby stroller after the shell is installed is shown;

[0031] Attached Figure 5 For attachment Figure 3 A schematic side view of the structure of the foldable baby stroller shown;

[0032] Attached Figure 6 For attachment Figure 3 The front view of the foldable baby stroller is shown;

[0033] Attached Figure 7 Attached Figure 1 Schematic diagram of the local structure of middle A;

[0034] Attached Figure 8 Attached Figure 2 Schematic diagram of the local structure of B

[0035] Attached Fig. 9 For attachment Figure 1 A schematic diagram of the structure of the front frame, locking mechanism and unlocking mechanism in the foldable baby stroller shown;

[0036] Attached Fig.10 For attachment Fig. 9 Schematic diagram of the three-dimensional structure;

[0037] Attached Fig.11 For attachment Fig.10 Schematic diagram of the local structure of middle C;

[0038] Attached Fig.12 For attachment Figure 1 A schematic diagram of the structure of a button in a folding baby stroller is shown in FIG.

[0039] The numbers in the figure are:

[0040] 1. Rear frame; 11. Guide groove; 12. Locking groove; 13. Front wheel assembly; 14. Rear wheel assembly; 15. Seat; 2. Front frame; 21. Slide; 22. Slide groove; 23. Footrest; 3. Front side rod; 31. Side wheel assembly; 32. Handle; 4. Rear side rod; 5. Locking piece; 6. Traction piece; 7. Joint; 8. Unlocking piece; 81. Inclined surface; 82. Protrusion; 9. Button; 91. Groove. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

[0042] Reference Figure 1 To Attachment Fig.12The foldable baby stroller in this embodiment has an unfolded state and a folded state. The foldable baby stroller comprises a rear frame 1, a front frame 2, a front side rod 3, and a rear side rod 4.

[0043] As attached Figure 5 and attached Figure 6 As shown, a front wheel assembly 13 is connected to the lower part of the front portion of the rear frame 1 , a rear wheel assembly 14 is connected to the lower part of the rear portion of the rear frame 1 , and a seat 15 is provided on the upper part of the rear portion of the rear frame 1 .

[0044] The front frame 2 is connected to the rear frame 1 so as to be movable forward and backward. Specifically, the front frame 2 and the rear frame 1 are both extended in the front-to-back direction, and the front frame 2 is U-shaped with its opening facing backward. The front frame 2 is inserted into the rear frame 1 from the front to the back. A pedal 23 is connected to the front end of the front frame 2.

[0045] The front part of the front side bar 3 is rotatably connected to the front part of the rear frame 1, and the rear part of the front side bar 3 is connected to the side wheel assembly 31. The bottom surface of the side wheel assembly 31 in this embodiment is higher than the bottom surface of the front wheel assembly 13 and the rear wheel assembly 14. The rear part of the front side bar 3 is provided with a handle 32.

[0046] The outer end of the rear side rod 4 is rotatably connected to the front side rod 3, preferably connected to the middle front part of the front side rod 3. The inner end of the rear side rod 4 is rotatably connected to the front frame 2. When the folding baby stroller is in the unfolded state and the folded state, the outer end of the rear side rod 4 is located in front of the inner end.

[0047] The specific structure of the connection between the inner end of the rear side rod 4 and the front frame 2 is as follows: a sliding sleeve 21 is slidably connected to the rear frame 1, and the inner end of the rear side rod 4 is rotatably connected to the sliding sleeve 21 through a rotating shaft. A guide groove 11 for the rotating shaft to move therein is provided on the rear frame 1, and the rotating shaft passes through the sliding sleeve 21 to connect the front frame 2 and the rear frame 1 together.

[0048] In a more preferred embodiment, the rear rod 4 is arc-shaped, and the arc is arched toward the front. The shape of the rear rod 4 can prevent children from hitting the rear rod 4 when riding the baby carriage, thereby ensuring the safety of children.

[0049] There are two front rods 3 and two rear rods 4, which are symmetrically arranged on the left and right sides of the front frame 2 and the rear frame 1. The two rear rods 4 are rotatably connected to the left and right sides of the sliding sleeve 21 respectively.

[0050] How folding works:

[0051] When the folding stroller is unfolded, Figure 1 and attached Figure 3As shown, the front side rods 3 and the rear side rods 4 on the left and right sides are wing-shaped on the left and right sides of the rear frame 2. When the vehicle needs to be folded, the front frame 2 is pushed backwards to gradually insert the front frame 2 into the rear frame 1, thereby driving the inner end of the rear side rod 4 to move backwards and rotate the rear side rod 4, and the outer end of the rear side rod 4 pulls the front side rod 3 backwards to rotate the front side rod 3 and move closer to the rear frame 1 until the vehicle is completely folded, as shown in the attached figure. Figure 2 and attached Figure 4 shown.

[0052] The foldable baby stroller in this embodiment further comprises a locking mechanism capable of locking the relative position between the front frame 2 and the rear frame 1 in the unfolded state and the folded state respectively, and an unlocking mechanism capable of unlocking the locking mechanism by operating the locking mechanism.

[0053] As attached Figure 7 and attached Figure 8 As shown, there are two groups of locking mechanisms, which are respectively arranged on the left and right sides of the baby stroller. Each group of locking mechanisms includes two locking grooves 12 arranged on the rear frame 1 and distributed along the front-to-back direction, and a lock member 5 which is retractably arranged on the front frame 2 and detachably connected to the locking groove 12. The lock member 5 is specifically arranged at the rear of the front frame 2. The two locking grooves 12 are distributed along the front-to-back direction. When the folding baby stroller is in the unfolded state, the lock member 5 is connected to the locking groove 12 located in the front, and when the folding baby stroller is in the folded state, the lock member 5 is connected to the locking groove 12 located in the rear.

[0054] The unlocking mechanism is arranged at the front of the front frame 2 for easy operation. Fig. 9 To Attachment Fig.11 As shown, the unlocking mechanism includes a slide groove 22 provided on the front frame 2, a joint 7 slidably provided in the slide groove 22, a traction member 6 fixedly connected to the joint 7 at one end and fixedly connected to the locking member 5 at the other end, and an unlocking member 8 movably provided on the front frame 2, and the unlocking member 8 has an inclined surface 81. The unlocking member 8 has an unlocking position and a locking position. When the unlocking member 8 moves from the locking position to the unlocking position, the inclined surface 81 can slide in contact with the joint 7 to make the joint 7 slide in the slide groove 22, and then the locking member 5 is pulled to move by the traction member 6, so that the locking member 5 is separated from the locking groove 12.

[0055] In this embodiment, the front frame 2 has a tubular structure, and the traction member 6 is a soft member, which is inserted into the tubular structure. Since there are two sets of locking mechanisms, there are two traction members 6, joints 7, slide grooves 22, and inclined surfaces 81 in the unlocking mechanism, and they are symmetrically arranged.

[0056] In a more preferred embodiment, a movable button 9 is provided on the front frame 2, and the button 9 is perpendicular to the moving direction of the unlocking member 8. The button 9 has two working positions, and the button 9 has a groove 91. When the button 9 is in the first position, the unlocking member 8 and the groove 91 are staggered, and the position of the unlocking member 8 corresponds to the position near the groove 91 on the button 9. At this time, if the unlocking member 8 is operated, the unlocking member 8 will abut against the position of the button 9, so that the unlocking member 8 is restricted to the locked position and cannot be operated. When the button 9 is in the second position, the unlocking member 8 corresponds to the position of the groove 91, and the unlocking member 8 can move. When the button 9 is in the second position and the unlocking member 8 is in the unlocking position, the unlocking member 8 will partially enter the groove 91. In this embodiment, the unlocking member 8 has a convex portion 82. When the button 9 is in the first position, the convex portion 82 and the groove 91 are staggered, and when the button 9 is in the second position, the convex portion 82 corresponds to the position of the groove 91. When the button 9 is in the second position and the unlocking member 8 is in the unlocking position, the convex portion 82 enters the groove 91. In another similar embodiment, the groove is arranged on the unlocking member 8, when the button 9 is in the first position, the button 9 and the groove are staggered, when the button 9 is in the second position, the button 9 and the groove are corresponding, when the button 9 is in the second position and the unlocking member 8 is in the unlocking position, the button 9 partially enters the groove. Due to the arrangement of the button 9, when it is necessary to unlock the locking mechanism, the button 9 must be pressed first before the unlocking member 8 can be moved, thereby preventing misoperation.

[0057] In a more preferred embodiment, the direction of movement of the unlocking member 8 from the locked position to the unlocked position is the same as the direction of movement of the front frame 2 when the stroller is unfolded, so that when the stroller needs to be unfolded, the unlocking operation to the unfolding operation can be completed in one go, which is convenient and quick. Accordingly, the direction of movement of the unlocking member 8 from the locked position to the unlocked position is opposite to the direction of movement of the front frame 2 when the stroller is folded, so as to prevent the stroller from being folded due to misoperation in the unfolded state.

[0058] How Lock Unlock works:

[0059] When the stroller needs to be folded or unfolded, the unlocking mechanism needs to be operated to unlock the locking mechanism. When unlocking, if the button 9 is not pressed, the unlocking member 8 will be blocked by the button 9 and cannot move when the unlocking member 8 is operated. Therefore, the button 9 needs to be pressed first to move it to the second working position, and then the unlocking member 8 needs to be pressed to push the joint 7 to slide through the inclined surface 81, and then the locking member 5 is pulled out of the locking groove through the pulling member 6 to unlock the locking mechanism.

[0060] Embodiment 2

[0061] The foldable baby stroller in this embodiment is different from the first embodiment only in that the front portion of the front rod is rotatably connected to the front frame, the inner end portion of the rear rod is rotatably connected to the rear frame, and the inner end portion of the rear rod drives the front rod to move closer to or away from the rear frame while the front frame and the rear frame slide relative to each other.

[0062] The folding baby stroller in the above embodiment, through its structural design, when the baby stroller is folded, the rear side rod drives the front side rod to rotate toward the rear frame, so that the front side rod and the rear side rod just close the two sides of the frame, thereby minimizing the width of the side, and making the folding operation very smooth without jamming. In addition, compared with the prior art, the front frame is closer to the rear frame, and the size of the whole vehicle is smaller after folding. The unlocking mechanism is easy to operate, and one-key unfolding and one-key folding can be achieved.

[0063] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A folding baby stroller, characterized in that: It includes A rear frame (1) having wheels connected to its bottom; A front frame (2) connected to the rear frame (1) so as to be movable forward and backward; A front side rod (3), the front portion of which is rotatably connected to the rear frame (1), and the rear portion of the front side rod (3) is connected to a side wheel assembly (31); A rear rod (4), an outer end of which is rotatably connected to the front rod (3), and an inner end of which is rotatably connected to the front frame (2); The foldable baby stroller has an unfolded state and a folded state, and when the baby stroller is in the unfolded state or the folded state, the outer end of the rear side rod (4) is located in front of the inner end; The foldable baby stroller further comprises a locking mechanism capable of locking the relative position between the front frame (2) and the rear frame (1) in the unfolded state and the folded state respectively, and an unlocking mechanism capable of unlocking the locking mechanism by operating the locking mechanism; The locking mechanism comprises at least two locking grooves (12) provided on the rear frame (1), and at least one locking element (5) movably arranged on the front frame (2) and detachably connected to the locking grooves (12); when the foldable baby stroller is in an unfolded state, the locking element (5) is connected to one of the locking grooves (12); and when the foldable baby stroller is in a folded state, the locking element (5) is connected to another of the locking grooves (12); The locking element (5) is arranged at the rear part of the front frame (2), and the unlocking mechanism is arranged at the front part of the front frame (2); The unlocking mechanism comprises a slide groove (22) arranged on the front frame (2), a joint (7) slidably arranged in the slide groove (22), a traction member (6) fixedly connected to the joint (7) at one end and fixedly connected to the locking member (5) at the other end, and an unlocking member (8) movably arranged on the front frame (2), the unlocking member (8) having an inclined surface (81) capable of slidingly contacting the joint (7) to cause the joint (7) to slide; The unlocking member (8) has an unlocking position and a locking position. A movable button (9) having two working positions is provided on the front frame (2). One of the button (9) and the unlocking member (8) has a groove (91). When the button (9) is in a first position, the other of the button (9) and the unlocking member (8) is staggered with the groove (91). The button (9) abuts against the unlocking member (8) so that the unlocking member (8) is restricted in the locking position. When the button (9) is in a second position, the other of the button (9) and the unlocking member (8) corresponds to the groove (91). When the button (9) is in the second position and the unlocking member (8) is in the unlocking position, the other of the button (9) and the unlocking member (8) enters the groove (91).

2. The foldable baby stroller according to claim 1, characterized in that: The button (9) and the unlocking member (8) have moving directions that are perpendicular.

3. The foldable baby stroller according to claim 1, characterized in that: The front frame (2) is inserted into the rear frame (1) from front to rear, a sliding sleeve (21) is slidably connected to the rear frame (1), an inner end of the rear side rod (4) is rotatably connected to the sliding sleeve (21) via a rotating shaft, a guide groove (11) is provided on the rear frame (1) for the rotating shaft to move therein, and the rotating shaft passes through the sliding sleeve (21) to connect the front frame (2) and the rear frame (1) together.

4. The foldable baby stroller according to claim 3, characterized in that: There are two front side rods (3) and two rear side rods (4), which are symmetrically arranged on the left and right sides of the front frame (2) and the rear frame (1), and the two rear side rods (4) are rotatably connected to the sliding sleeve (21).

5. The foldable baby stroller according to claim 1, characterized in that: A front wheel assembly (13) is connected below the front portion of the rear frame (1), a rear wheel assembly (14) is connected below the rear portion of the rear frame (1), and a bottom surface of the side wheel assembly (31) is higher than bottom surfaces of the front wheel assembly (13) and the rear wheel assembly (14).

6. The foldable baby stroller according to claim 1, characterized in that: When the foldable baby stroller is in an unfolded state, the front frame (2) is unfolded relative to the rear frame (1), and the rear portion of the front side rod (3) is away from the rear frame (1); when the foldable baby stroller is in a folded state, the front frame (2) and the rear frame (1) slide and contract, the rear end of the front side rod (3) is brought closer to the rear frame (1), and the inner end portion of the rear side rod (4) slides backward relative to the rear frame (1) as the front frame (2) slides relative to the rear frame (1).

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