Vehicle frames and infant / toddler vehicles

Abstract

This invention relates to a vehicle frame and an infant carrier. The frame includes a support frame, a seat frame, a linkage, and a connecting rod assembly. The connecting rod assembly connects to the support frame and the seat frame. One end of the linkage is connected to the support frame, and the other end is connected to the connecting rod assembly. When the support frame is folded, the linkage drives the connecting rod assembly, thereby pivoting and folding the seat frame. In the above-described frame, the connecting rod assembly connects the support frame and the seat frame, and the linkage connects the support frame and the connecting rod assembly. Thus, when the support frame is folded, the linkage drives the connecting rod assembly, thereby pivoting and folding the seat frame. The cooperation between the linkage and the connecting rod assembly simplifies the overall frame structure, making the unfolding and folding processes time-saving and labor-saving. Furthermore, the folding of the support frame also causes the seat frame to fold simultaneously, making it convenient to use.

Description

Technical Field

[0001] This invention relates to the technical field of infant and toddler vehicles, and in particular to a vehicle frame and an infant and toddler vehicle. Background Technology

[0002] Commercially available infant and toddler vehicles, such as strollers, typically have foldable frames for easy carrying and storage. To further reduce the folded size, the front wheel frame, rear wheel frame, and seat frame are often folded and interlocked on a single plane. This often requires the use of corresponding linkage components to achieve overall linkage, resulting in a very complex frame structure and time-consuming and laborious operation. Summary of the Invention

[0003] Therefore, it is necessary to provide a frame and infant carrier that have a simple structure, save time and effort in unfolding or folding, and are easy to use.

[0004] A vehicle frame includes a support frame, a seat frame, a linkage, and a linkage assembly. The linkage assembly is connected to the support frame and the seat frame. One end of the linkage is connected to the support frame, and the other end of the linkage is connected to the linkage assembly. When the support frame is folded, it can drive the linkage assembly through the linkage, thereby causing the seat frame to pivot and fold.

[0005] In the aforementioned frame, the linkage assembly connects the support frame and the seat frame, while the linkage connects the support frame and the linkage assembly. Thus, when the support frame folds, the linkage drives the linkage assembly, thereby causing the seat frame to pivot and fold. The cooperation between the linkage and the linkage assembly simplifies the overall frame structure, making both unfolding and folding processes time-saving and labor-saving. Furthermore, the folding of the support frame also causes the seat frame to fold simultaneously, making it convenient to use.

[0006] In one embodiment, the support frame includes a rider frame, a front wheel frame, and a rear wheel frame, which are pivotally connected to each other. The linkage assembly includes a first link and a fourth link. The first link is pivotally connected to the rear wheel frame via a first pivot axis. The fourth link is pivotally connected to the front wheel frame via a second pivot axis. The linkage member is pivotally connected to the rider frame via a third pivot axis, and to the first and fourth links via a fourth pivot axis. The fourth link is connected to the seat frame via a first connection point and a second connection point, which are spaced apart.

[0007] In one embodiment, the fourth link is a U-shaped structure, including a first pivot portion, a second pivot portion, and a connecting portion connecting the first pivot portion and the second pivot portion. The connection between the first pivot portion and the connecting portion is pivotally connected to the front wheel frame via a second pivot shaft. The connection between the second pivot portion and the connecting portion is pivotally connected to the first link via a fourth pivot shaft. The end of the first pivot portion away from the connecting portion is connected to the seat frame at a first connection point. The end of the second pivot portion away from the connecting portion is connected to the seat frame at a second connection point.

[0008] In one embodiment, the support frame includes a rider frame, a front wheel frame, and a rear wheel frame, which are pivotally connected to each other. The linkage assembly includes a first link, a second link, and a third link. The first link is pivotally connected to the rear wheel frame via a first pivot axis. The second link is pivotally connected to the front wheel frame via a second pivot axis. The third link is pivotally connected to the seat frame via a fifth pivot axis. The linkage member is pivotally connected to the rider frame via a third pivot axis, the linkage member is pivotally connected to the first link and the second link via a fourth pivot axis, and the third link, the second link, and the front wheel frame are pivotally connected to the second pivot axis.

[0009] In one embodiment, the frame further includes a support rod, which is pivotally connected to the rider frame via a sixth pivot axis, and the support rod is also pivotally connected to the first connecting rod and the rear wheel frame via the first pivot axis.

[0010] In one embodiment, the frame further includes a support rod, which is pivotally connected to the rider frame via a sixth pivot axis. The support rod is also pivotally connected to the first link and the rear wheel frame via the first pivot axis. The support rod is also pivotally connected to the seat frame via a seventh pivot axis, which is located between the first pivot axis and the sixth pivot axis. The support rod, the first link, the second link, the third link, and the seat frame form a five-bar linkage structure.

[0011] In one embodiment, the frame further includes a pivoting mechanism disposed on the support frame, the linkage being pivotally connected to a third pivot shaft via the pivoting mechanism, and the frame further includes an armrest frame connected to the pivoting mechanism.

[0012] In one embodiment, the pivoting mechanism includes a fixed seat and a pivoting seat. The fixed seat is fixed to the support frame, and the pivoting seat and the linkage are pivotally connected to the fixed seat via a third pivoting shaft. The handrail is connected to the pivoting seat.

[0013] In one embodiment, the support frame includes a handrail, a front wheel frame, a rear wheel frame, and a pivot joint. The handrail, the front wheel frame, and the rear wheel frame are pivotally connected to each other via the pivot joint. The frame also includes a handrail frame connected to the pivot joint.

[0014] In one embodiment, the frame further includes a folding strap that passes between the front wheel frame, the rear wheel frame, and the seat frame, and the frame can be folded by pulling the folding strap.

[0015] In one embodiment, the seat frame includes a seat post and a seat plate, the seat post being supported below the seat plate, the seat plate being used to support an infant, one end of the folding strap being connected to the seat post, and the other end passing through the rear wheel frame, the front wheel frame and the seat plate in sequence, the folding strap being used as a carrying strap when the frame is folded.

[0016] An infant vehicle includes a frame as described in any of the foregoing embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the vehicle frame structure according to the first embodiment of the present invention;

[0018] Figure 2 for Figure 1 The side view of the vehicle frame shown;

[0019] Figure 3 for Figure 1 The cross-sectional view of the frame shown is along line X1-X1, with the frame in its unfolded state.

[0020] Figure 4 for Figure 1 The cross-sectional view of the frame shown is along line X1-X1, at which point the frame is in a transitional state.

[0021] Figure 5 for Figure 1 The cross-sectional view of the frame shown is along line X1-X1, at which point the frame is in another transitional state;

[0022] Figure 6 for Figure 1 The diagram shows another structural schematic of the frame, in which the frame is folded down.

[0023] Figure 7 for Figure 6 The side view of the vehicle frame shown;

[0024] Figure 8 for Figure 1 The cross-sectional view of the vehicle frame shown;

[0025] Figure 9 for Figure 1 The exploded view of the vehicle frame shown;

[0026] Figure 10 for Figure 3 Enlarged view of point C;

[0027] Figure 11 for Figure 9 Enlarged view of the second connecting seat and part of the locking mechanism in the frame shown;

[0028] Figure 12 for Figure 1 Another exploded view of the chassis shown;

[0029] Figure 13 for Figure 1 The diagram shows a partial cross-sectional view near the pivot mechanism in the chassis, with the chassis in an unfolded state.

[0030] Figure 14 for Figure 1 The diagram shows a partial cross-sectional view near the pivot mechanism in the chassis, with the chassis in a folded-down state.

[0031] Figure 15 for Figure 9 Enlarged view of point D;

[0032] Figure 16 for Figure 1 The cross-sectional view shown is of the frame with the seat plate and folding straps added, in which the frame is in the unfolded state.

[0033] Figure 17 for Figure 16 The diagram shown is a structural schematic of the frame with the seat plate and folding strap added, at which point the frame is in a folded-down state.

[0034] Figure 18 This is a schematic diagram of the vehicle frame structure according to the second embodiment of the present invention;

[0035] Figure 19 for Figure 18 The side view of the vehicle frame shown;

[0036] Figure 20 for Figure 18 The cross-sectional view of the frame shown is along line X2-X2, with the frame in its unfolded state.

[0037] Figure 21 for Figure 18 The cross-sectional view of the frame shown is along line X2-X2, at which point the frame is in a transitional state.

[0038] Figure 22 for Figure 18 The cross-sectional view of the frame shown is along line X2-X2, at which point the frame is in another transitional state;

[0039] Figure 23 for Figure 18 The diagram shows another structural schematic of the frame, in which the frame is folded down.

[0040] Figure 24 for Figure 18 The image shows a cross-sectional view of the frame along line X2-X2, with the frame in a folded-down state.

[0041] Figure 25 for Figure 18 The exploded view of the vehicle frame is shown.

[0042] Figure 26 This is a schematic diagram of the vehicle frame structure according to the third embodiment of the present invention;

[0043] Figure 27 for Figure 26 The exploded view of the vehicle frame shown;

[0044] Figure 28 for Figure 26 The cross-sectional view of the frame along line X3-X3 is shown, with the frame in its unfolded state.

[0045] Figure 29 for Figure 26 The cross-sectional view of the frame shown is along line X3-X3, at which point the frame is in a transitional state.

[0046] Figure 30 for Figure 26 The image shows a cross-sectional view of the frame along line X3-X3, with the frame folded down.

[0047] Explanation of reference numerals in the attached figures

[0048] 10. Frame; 1010. Support frame; 100. Handrail; 110. Handrail body; 111. Hollow inner cavity; 112. Operating port; 113. Release port; 120. Handrail lever; 121. First lever; 122. Second lever; 123. Drive lever; 124. First connecting seat; 1240. First connecting groove; 1241. First connecting part; 1242. First connecting housing; 125. Second connecting seat; 1250. Second connecting groove; 1251. Second connecting part; 1252. Second connecting housing; 1252a. Second locking groove; 1252b. Second toothed groove; 1252c. Pivot cylinder; 1252d. Pivot hole; 200. Front wheel frame; 210. Front crossbar; 220. Front side bar; 230. First fixing ring; 300. Rear wheel frame; 310. Rear crossbar; 320. Rear side bar; 330. Second fixing ring; 400. Seat frame; 410. Seat post; 411. Fixing part; 420. Seat plate; 421. First through hole; 422. Second through hole; 423. Hole pivot; 510. Linkage component; 511. Clearance recess; 512. First rod segment; 513. Second rod segment; 520. Support rod; 600. Linkage assembly; 610, First link; 620, Second link; 630, Third link; 640, Fourth link; 641, First pivot; 642, Second pivot; 643, Connecting part; 700, Locking mechanism; 710, Locking element; 711, Locking tooth; 720, First reset element; 730, Driving element; 731, Driving ramp; 732, Driving part; 740, Operating element; 741, Pushing ramp; 742, Clearance groove; 750, Traction element; 751, First end; 752, Second end; 760, Connecting element; 761, Driving groove; 762, Safety release part; 7621, Blocking part; 770, Second reset element; 800, Pivoting mechanism; 810, Fixed base; 811, Limiting groove; 8111, First groove end; 8112, Second groove end; 820, Pivot seat; 821, Pivot hole; 822, Limiting part; 823, Movable groove; 8231, First groove wall; 8232, Second groove wall; 824, Engaging protrusion; 8241, Guide groove; 8242, Mating recess; 900, Handrail frame; 910, Handrail body; 920, Snap-fit ​​part; 921, Engaging recess; 922, Guide protrusion; 923, Mating protrusion; 924, Snap-fit ​​opening; 925, Locking protrusion; 201, Front wheel seat; 2 02. Front wheel; 203. Rear wheel seat; 204. Rear wheel; 205. Converging belt; 101. First pivot shaft; 102. Second pivot shaft; 103. Third pivot shaft; 104. Fourth pivot shaft; 105. Fifth pivot shaft; 106. Sixth pivot shaft; 107. Seventh pivot shaft; 108. Eighth pivot shaft; 303. Pivot joint; 3031. End; 3032. Snap-fit ​​groove; 3033. Snap-fit ​​interface; 3034. Locking recess;

[0049] A. First connection point; B. Second connection point. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of protection of this invention.

[0051] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0053] First Embodiment

[0054] The first embodiment of this invention provides an infant carrier, such as an infant stroller. Figure 1 and Figure 2 As shown, the infant carrier includes a foldable frame 10 and a seat cover (not shown in the attached diagram) covering the frame 10. The frame 10 and the infant carrier have a simple structure, and the unfolding or folding process is time-saving and labor-saving, making them convenient to use. The foldable frame 10 in its unfolded state (e.g., Figures 1 to 3 (as shown) and closed state (as shown) Figure 6 and Figure 7 You can switch between the two (as shown). Figure 4 and Figure 5 The diagram shows the frame 10 in a transitional state between an extended and retracted state. In this embodiment, the frame 10 may include, for example, a support frame 1010. The support frame 1010 may include, for example, a rider frame 100, a front wheel frame 200, and a rear wheel frame 300. The rider frame 100, the front wheel frame 200, and the rear wheel frame 300 are pivotally connected to each other and can be extended or retracted relative to each other. In this embodiment, as... Figure 1As shown, the rider frame 100 is generally U-shaped, including a rider body 110 located at the top and rider poles 120 connected to both ends of the rider body 110. In this embodiment, each rider pole 120 includes a first member 121 and a second member 122 pivotally connected to each other. The front wheel frame 200 is also generally U-shaped, including a front crossbar 210 located at the lower front and two front side bars 220 connected to both ends of the front crossbar 210. Two front wheel seats 201 are connected to the lower part of the front crossbar 210, and two front wheels 202 are respectively mounted on the two front wheel seats 201. The rear wheel frame 300 is generally U-shaped, including a rear crossbar 310 located at the lower rear and two rear side bars 320 connected to both ends of the rear crossbar 310. Two rear wheel seats 203 are respectively connected to the bottom ends of the two rear side bars 320, and two rear wheels 204 are respectively mounted on the two rear wheel seats 203. Figure 1 As shown, the frame 10 also includes a seat frame 400 suitable for carrying infants and toddlers. In this embodiment, the seat frame 400 is detachably mounted between the two handlebars 120 or the two front side bars 220. In other embodiments, the seat frame 400 may also be non-detachably mounted between the two handlebars 120 or the two front side bars 220. In this embodiment, the seat frame 400 includes two seat posts 410, which are located on the left and right sides of the frame 10 and extend generally along the front-rear direction of the frame 10.

[0055] It should be noted that, unless otherwise explicitly specified and limited, the directional terms such as "front," "rear," "left," "right," "up," and "down" in this embodiment correspond to the "front," "rear," "left," "right," "up," and "down" directions when the stroller is in the unfolded state. Furthermore, the "front," "rear," "left," "right," "up," and "down" directions are schematically indicated by arrows F, B, L, R, U, and D in the figure, respectively. These directional terms are only used to make the description of the embodiments of the present invention clearer and are not intended to unduly limit the scope of protection of the present invention.

[0056] Furthermore, such as Figures 1 to 3As shown, the frame 10 also includes a linkage 510 and a linkage assembly 600. The linkage assembly 600 is connected to the front wheel frame 200 and the rear wheel frame 300. One end of the linkage 510 is connected to the rider frame 100, and the other end of the linkage 510 is connected to the linkage assembly 600. When the rider frame 100 pivots and folds, the linkage 510 can drive the linkage assembly 600 to actuate, thereby causing the front wheel frame 200 and the rear wheel frame 300 to pivot and fold relative to each other. Specifically, the linkage assembly 600 includes a first link 610 and a second link 620. The first link 610 is pivotally connected to the rear wheel frame 300 via a first pivot shaft 101, and the second link 620 is pivotally connected to the front wheel frame 200 via a second pivot shaft 102. Linkage component 510 is pivotally connected to the frame 100 via the third pivot shaft 103, and to the first link 610 and the second link 620 via the fourth pivot shaft 104. Specifically, there are two linkage components 510 and two link assemblies 600, respectively located on the left and right sides of the frame 10, and are connected and linked to the two handrails 120, two front side links 220, and two rear side links 320 located on the left and right sides of the frame 10. The structure and connection relationship of the frame 10 on one side (left or rear) are explained in detail below. It should be noted that, unless otherwise specified, the relationship between the components in the following text refers to the frame 10 in the unfolded state.

[0057] See Figure 3The lower end of the first rod 121 is pivotally connected to the top end of the front rod 220 and the top end of the rear rod 320. Specifically, the support frame 1010 also includes a pivot joint 303, through which the lower end of the first rod 121 is pivotally connected to the top end of the front rod 220 and the top end of the rear rod 320. In this embodiment, the pivot joint 303 can be a T-shaped structure, with the lower end of the first rod 121, the top end of the front rod 220, and the top end of the rear rod 320 pivotally connected to the three ends 3031 of the pivot joint 303, respectively. The upper end of the first rod 121 is pivotally connected to the lower end of the second rod 122, and the upper end of the second rod 122 is connected to one end of the rider body 110. The first link 610 and the second link 620 extend approximately along the front-rear direction of the frame 10, and the linkage 510 extends approximately along the vertical direction of the frame 10. The rear end of the first link 610 is pivotally connected to the rear side link 320 via the first pivot shaft 101. The front end of the second link 620 is pivotally connected to the front side link 220 via the second pivot shaft 102. The upper end of the linkage 510 is pivotally connected to the first link 121 of the handlebar 120 via the third pivot shaft 103, and the lower end of the linkage 510 is pivotally connected to the front end of the first link 121 and the rear end of the second link 122 via the fourth pivot shaft 104. In this embodiment, the linkage 510 is generally a curved or arc-shaped rod, and the linkage 510 forms a clearance recess 511. When the frame 10 is in the folded state, the linkage 510 avoids the first pivot shaft 101 through the clearance recess 511. In this embodiment, the linkage 510 includes a first link segment 512 and a second link segment 513 that are connected to each other. The first segment 512 is located below the second segment 513. The first segment 512 is a straight segment, and the second segment 513 is a straight segment extending rearward from its upper end. The first segment 512 and the second segment 513 are set at a certain angle, for example, approximately 140 degrees to 160 degrees. Thus, the connection between the first segment 512 and the second segment 513 forms a rearward-facing clearance recess 511. Figure 6 As shown, when the frame 10 is in the folded state, the linkage 510 rotates to one side of the first pivot shaft 101. At this time, the first pivot shaft 101 is approximately located within the avoidance recess 511 and will not interfere with the linkage 510. That is, the linkage 510 avoids the first pivot shaft 101 through the avoidance recess 511.

[0058] Furthermore, such as Figure 3As shown, the linkage assembly 600 also includes a third link 630. The third link 630 is pivotally connected to the seat frame 400 via a fifth pivot shaft 105, and the third link 630, the second link 620, and the front wheel frame 200 are pivotally connected to a second pivot shaft 102. In this embodiment, the third link 630 is arranged at approximately a certain angle to the first link 610 and the second link 620. One end of the third link 630 is pivotally connected to the seat post 410 via the fifth pivot shaft 105, and the other end of the third link 630, the front end of the second link 620, and the front side rod 220 are pivotally connected to the second pivot shaft 102. In this embodiment, the second pivot shaft 102 is located in front of and below the fifth pivot shaft 105. Of course, in other embodiments, the positions of the second pivot 102 and the fifth pivot 105 can also be adjusted as needed, such as the second pivot 102 being located behind and above the fifth pivot 105.

[0059] Furthermore, such as Figure 3 As shown, the frame 10 may also include a support rod 520. The support rod 520 is supported on the opposite rear sides of the rider frame 100 and the rear wheel frame 300. The support rod 520 is pivotally connected to the rider frame 100 via a sixth pivot shaft 106, and is also pivotally connected to the first link 610 and the rear wheel frame 300 via a first pivot shaft 101. The support rod 520 is also pivotally connected to the seat frame 400 via a seventh pivot shaft 107. Specifically, the rider arm 120 also includes a drive rod 123. The end of the first link 121 away from the second link 122 is pivotally connected to the front wheel frame 200 and the rear wheel frame 300. The drive rod 123 is connected to the end of the second link 122 near the first link 121 and extends towards the other end away from the second link 122, i.e., away from the rider body 110. Specifically, the lower end of the support rod 520 is pivotally connected to the rear end of the first connecting rod 610 and the rear side rod 320 via the first pivot shaft 101. The upper end of the first rod 121 is provided with a first connecting seat 124 (see...). Figure 2 In this embodiment, the first rod 121 and the first connecting seat 124 are integrally formed. Of course, in other embodiments, the drive rod 123 and the first connecting seat 124 can also be independent components connected by riveting or welding.

[0060] In this embodiment, as Figure 8 and Figure 9As shown, the first connecting seat 124 has a first connecting portion 1241, and the upper end of the first rod 121 is connected to the first connecting portion 1241. The first connecting portion 1241 may, for example, have a first connecting groove 1240, into which the upper end of the first rod 121 is inserted to achieve connection. Alternatively, the lower end of the first rod 121 may have a first connecting groove 1240, into which the first connecting portion 1241 is inserted to achieve connection. The upper end of the drive rod 123 is provided with a second connecting seat 125. In this embodiment, the drive rod 123 and the second connecting seat 125 are integrally formed. Of course, in other embodiments, the drive rod 123 and the second connecting seat 125 may also be independent components connected by riveting or welding. In this embodiment, the second connecting seat 125 has a second connecting portion 1251, into which the lower end of the second rod 122 is connected. The second connecting portion 1251 may, for example, have a second connecting groove 1250, into which the lower end of the second rod 122 is inserted to achieve connection. Alternatively, the lower end of the second rod 122 may have a second connecting groove 1250, into which the second connecting portion 1251 is inserted to achieve connection. Further, the first connecting seat 124 may also include a first connecting housing 1242 connected to the first connecting portion 1241. In this embodiment, the first connecting portion 1241 and the first connecting housing 1242 are integrally formed. In other embodiments, the first connecting portion 1241 and the first connecting housing 1242 may be independent components connected by riveting or welding. The second connecting seat 125 may also include a second connecting housing 1252 connected to the second connecting portion 1251. In this embodiment, the second connecting portion 1251 and the second connecting housing 1252 are integrally formed. In other embodiments, the second connecting portion 1251 and the second connecting housing 1252 may also be independent components connected by riveting or welding. Please refer to [the relevant documentation / reference]. Figure 3 The first connecting housing 1242 and the second connecting housing 1252 are pivotally connected to the eighth pivot shaft 108. The seventh pivot shaft 107 is located behind the fifth pivot shaft 105 and is located between the first pivot shaft 101 and the sixth pivot shaft 106.

[0061] like Figures 3 to 5As shown, the drive rod 123, support rod 520, rear wheel frame 300, and handrail 100 form a four-bar linkage structure, specifically the drive rod 123, support rod 520, rear side rod 320, and first rod 121. When the second rod 122 rotates, it can drive the frame 10 to retract through this four-bar linkage structure. When the frame 10 is in the extended state, the handrail 100 can be locked through this four-bar linkage structure. The support rod 520, first link 610, second link 620, third link 630, and seat frame 400 form a five-bar linkage structure, specifically the portion of the support rod 520 located between the first pivot shaft 101 and the seventh pivot shaft 107, the first link 610, second link 620, third link 630, and seat post 410. During the retraction of the frame 10, the seat post 410 (or seat frame 400) can be driven through this five-bar linkage structure to complete the extension and retraction.

[0062] Furthermore, such as Figure 8 and Figure 9 As shown, the frame 10 also includes a locking mechanism 700. The locking mechanism 700 is switchable between a locked state and an unlocked state. When the locking mechanism 700 is in the locked state, the drive rod 123, the second rod 122, and the first rod 121 are relatively fixed, and the frame 10 is locked in an unfolded or folded state. When the locking mechanism 700 is in the unlocked state, the drive rod 123, the second rod 122, and the first rod 121 can rotate relative to each other, allowing the frame 10 to switch between the unfolded and folded states. In this embodiment, there are two locking mechanisms 700, each used to selectively lock the first rod 121, the second rod 122, and the drive rod 123 located on the left and right sides of the frame 10. The structure and connection relationship of one of the locking mechanisms 700 are described in detail below as an example:

[0063] Specifically, such as Figure 8 and Figure 9As shown, the locking mechanism 700 includes a locking element 710. In this embodiment, the locking element 710 is generally annular in shape, and a plurality of locking teeth 711 are circumferentially spaced. The locking element 710 can be switched between a locked position and an unlocked position. Specifically, the first connecting housing 1242 is generally a disc-shaped housing. The side of the first connecting housing 1242 facing the second connecting housing 1252 is provided with a first locking groove (not shown in the figure). The first locking groove includes a plurality of first toothed grooves (not shown in the figure), and the plurality of first toothed grooves correspond to the plurality of locking teeth 711 of the locking element 710. The second connecting housing 1252 is generally a disc-shaped housing. The side of the second connecting housing 1252 facing the first connecting housing 1242 is provided with a second locking groove 1252a. The second locking groove 1252a includes a plurality of second toothed grooves 1252b, and the plurality of second toothed grooves 1252b correspond to the plurality of locking teeth 711 of the locking element 710. A pivot cylinder 1252c is provided at approximately the center of the second locking groove 1252a, and a pivot hole 1252d is formed at the axial center of the pivot cylinder 1252c. An eighth pivot shaft 108 is provided at approximately the center of the first locking groove, and the eighth pivot shaft 108 is adapted to be inserted into the pivot hole 1252d. The first connecting seat 124 and the second connecting seat 125 are adapted to engage with each other so that the first locking groove and the second locking groove 1252a communicate to form a locking cavity (not labeled in the figure). At this time, the eighth pivot shaft 108 is inserted into the pivot hole 1252d to realize the pivot connection of the first connecting seat 124 and the second connecting seat 125, that is, to realize the pivot connection of the first rod 121 with the second rod 122 and the drive rod 123. The locking member 710 is movably disposed in the locking cavity and can be switched between the locked position and the unlocked position. When the locking member 710 is in the locked position, part of the locking member 710 is located in the first locking groove and part of the second locking groove 1252a, so that the drive rod 123 and the rider frame 100 are relatively fixed; when the locking member 710 is in the unlocked position, the locking member 710 is only located in the first locking groove or only in the first locking groove, so that the drive rod 123 and the rider frame 100 can rotate relative to each other.

[0064] Furthermore, such as Figure 9 As shown, the locking mechanism 700 may further include a first reset member 720. The first reset member 720 is disposed within the locking cavity and is adapted to apply force to the locking member 710 to move the locking member 710 to the locked position. In this embodiment, the first reset member 720 is a spring. In other embodiments, the first reset member 720 may also be an elastic sheet or other elastic structure. Specifically, the first reset member 720 is disposed within the second locking groove 1252a, and the first reset member 720 is sleeved outside the pivot cylinder 1252c with one end abutting against the bottom of the second locking groove 1252a and the other end abutting against the locking member 710.

[0065] Furthermore, such as Figure 8 and Figure 9As shown, the locking mechanism 700 may further include a drive member 730. The drive member 730 is disposed within the locking cavity and adapted to be operated to push the locking member 710 toward the unlocking position. In this embodiment, the drive member 730 is generally annular in shape. The drive member 730 is movably disposed within the locking cavity and located between the locking member 710 and the first connecting seat 124. A plurality of drive ramps 731 are circumferentially spaced on the side of the drive member 730 facing the locking member 710. The drive member 730 is adapted to be operated to push a plurality of locking teeth 711 against the plurality of drive ramps 731 to move the locking member 710 toward the bottom of the second locking groove 1252a, thereby moving the locking member 710 toward the unlocking position.

[0066] Furthermore, such as Figure 8 and Figure 9 As shown, the locking mechanism 700 also includes an operating member 740 and a traction member 750. The traction member 750 is connected between the operating member 740 and the driving member 730. The operating member 740 can be operated to drive the driving member 730 through the traction member 750, causing the driving member 730 to push the locking member 710 to move towards the unlocking position. In this embodiment, the operating member 740 can be disposed in the hollow cavity 111 of the rider body 110. The lower side of the rider body 110 is also provided with an operating port 112 that can communicate with the hollow cavity 111, and at least part of the operating member 740 extends downward through the operating port 112 for being pressed. The traction member 750 is a steel cable. In this embodiment, there is one operating member 740 and two traction members 750. One end of each of the two traction members 750 is drivenly connected to the operating member 740, and the other end of each of the two traction members 750 is connected to the driving member 730 of the locking mechanism 700 located on both sides of the rider frame 100.

[0067] Furthermore, such as Figure 8 The locking mechanism 700 further includes a connector 760. The connector 760 is disposed on the rider body 110 and at least partially located within the hollow cavity 111 of the rider body 110. The connector 760 has two drive slots 761, both extending approximately along the left-right direction of the frame 10. Each of the two traction members 750 has a first end 751 at one end, which is inserted into and movable along the two drive slots 761. The operating member 740, located within the hollow cavity 111 of the rider body 110, forms two opposing inclined pushing surfaces 741. The two pushing surfaces 741 abut against the two first ends 751. When the operating member 740 is pushed upwards (i.e., along...),... Figure 8 When pressed (in the D1 direction), the two abutting inclined surfaces 741 respectively abut against the two first ends 751 along the two drive grooves 761 facing each other (i.e., along the D1 direction). Figure 8 Move in the D2 direction (as shown in the image). Figure 9 and Figure 11As shown, each of the two second traction members 750 has a second end 752 at its other end. A driving portion 732 is provided on the outer peripheral wall of the driving member 730. The two second ends 752 are respectively connected to the driving portions 732 of the driving members 730 of the two locking mechanisms 700 located on the left and right sides of the frame 10. Further, the connecting member 760 also has a protruding safety release portion 762. Specifically, as... Figure 10 As shown, the rear side of the rider body 110 is also provided with a release port 113, through which the safety release part 762 extends for operation. The safety release part 762 is switchable between a blocking position and a release position. When the safety release part 762 is in the blocking position, it is located on the movement path of the operating member 740. When the safety release part 762 is in the yielding position, it deviates from the movement path of the operating member 740. Further, the locking mechanism 700 may also include a second reset member 770. The second reset member 770 is adapted to apply force to the connecting member 760 to move the safety release part 762 toward the blocking position. In this embodiment, the direction in which the safety release part 762 moves from the blocking position to the yielding position is... Figure 10 The D3 direction is approximately perpendicular to the extension direction of the handlebar 120 and forms a certain angle with the longitudinal direction of the frame 10. Specifically, the operating member 740 has a clearance groove 742. The clearance groove 742 is located between two abutment ramps 741. The safety release part 762 is approximately T-shaped, including a blocking part 7621 and a clearance part (not shown) that are connected to each other and approximately perpendicular. The blocking part 7621 is located in the D3 direction of the clearance part. The dimension of the blocking part 7621 in the left-right direction is larger than the width of the clearance groove 742, and the dimension of the clearance part in the left-right direction is smaller than the width of the clearance groove 742. When the safety release part 762 is in the blocking position, the blocking part 7621 and the clearance groove 742 are opposite each other to form a block, so that the operating member 740 cannot be pressed. When the safety release part 762 is in the clearance position, the clearance part and the clearance groove 742 are opposite to each other to form clearance (or the clearance part can enter the clearance groove 742 to form clearance), so that the operating member 740 can be pressed to release the lock. The setting of the safety release part 762 is equivalent to setting a second safety lock for the locking mechanism 700, preventing the operating member 740 from being accidentally pressed, which could cause the frame 10 to fold unexpectedly and create a safety hazard.

[0068] The following is combined with Figure 3 , Figures 8 to 10 A detailed description of the working principle of the locking mechanism 700:

[0069] When it is necessary to rotate the first connecting seat 124 relative to the second connecting seat 125, the safety release part 762 can be pressed along the D3 direction, causing the safety release part 762 to move from the blocking position to the avoidance position, that is, the safety release part 762 deviates from the movement path of the operating member 740. At this time, the operating member 740 can be pressed along the D1 direction, causing the operating member 740 to drive the two first ends 751 to move towards each other along the D2 direction in the drive groove 761 through the interaction of the pushing inclined surface 741 and the two first ends 751, thereby causing the two traction members 750 to drive the driving members 730 in the two locking mechanisms 700 to rotate through the two second ends 752. Taking the locking mechanism 700 located on one side of the frame 10 as an example, the driving member 730 rotates until its driving inclined surface 731 pushes against the locking teeth 711 of the locking member 710, thereby driving the locking member 710 to move from the locked position to the unlocked position, that is, the locking member 710 is only located in the second locking groove 1252a, and the first reset member 720 is compressed and deformed. At this time, the locking mechanism 700 is unlocked, the first connecting seat 124 and the second connecting seat 125 can rotate relative to each other, and the frame 10 can be folded or unfolded. After the first connecting seat 124 and the second connecting seat 125 rotate relative to each other, due to the misalignment of the first locking groove and the second locking groove 1252a, the locking member 710 cannot return to the locked position under the action of the first reset member 720 before the frame 10 is folded into place or restored to the unfolded state.

[0070] When the frame 10 is folded into place or returned to the unfolded state, the first locking groove and the second locking groove 1252a are re-aligned. After the drive member 730 loses the force of the traction member 750, it no longer pushes against the locking member 710. As a result, the locking member 710 moves to the locking position under the elastic restoring force of the first reset member 720, that is, the locking member 710 is simultaneously located in the first locking groove and the second locking groove 1252a.

[0071] It is understood that the alignment of the first locking groove and the second locking groove 1252a mentioned above refers to the alignment of the plurality of first toothed grooves of the first locking groove with the plurality of second toothed grooves 1252b of the second locking groove 1252a, so that the locking member 710 can be located simultaneously within the first toothed groove and the second toothed groove 1252b. The misalignment of the first locking groove and the second locking groove 1252a mentioned above refers to the misalignment of the plurality of first toothed grooves of the first locking groove with the plurality of second toothed grooves 1252b of the second locking groove 1252a, so that the locking member 710 cannot be located simultaneously within the first toothed groove and the second toothed groove 1252b; that is, the locking member 710 can only be located within the first toothed groove or only within the second toothed groove 1252b. In this embodiment, the locking teeth 711 of the locking member 710 are evenly spaced along its circumferential direction; therefore, the plurality of first toothed grooves of the first locking groove and the plurality of second toothed grooves 1252b of the second locking groove 1252a are also evenly spaced along their circumferential direction. When the frame 10 is in the unfolded state, the first locking groove and the second locking groove 1252a are aligned; when the frame 10 is in the folded state, the first locking groove and the second locking groove 1252a are also aligned.

[0072] In some embodiments, the positions of the first reset member 720 and the drive member 730 can also be reversed. That is, the first reset member 720 can be disposed between the locking member 710 and the bottom of the first locking groove, and the drive member 730 is located between the bottom of the second locking groove 1252a and the locking member 710. When the locking member 710 is in the locked position, the locking member 710 is located between the first locking groove and the second locking groove 1252a; when the locking member 710 is in the unlocked position, the locking member 710 is located only in the first locking groove.

[0073] Furthermore, such as Figures 12 to 14 As shown, the frame 10 also includes a pivoting mechanism 800. The pivoting mechanism 800 is located on the handrail 100, and the linkage 510 is pivotally connected to the handrail 100 via the pivoting mechanism 800 to the third pivot shaft 103. The frame 10 also includes a handrail 900, which is connected to the pivoting mechanism 800. There are two pivoting mechanisms 800, respectively located on the opposite lower sides of the first members 121 of the two handrails 120. The structure and connection relationship of one of the pivoting mechanisms 800 are described in detail below:

[0074] Specifically, such as Figure 12 As shown, the pivoting mechanism 800 includes a fixed seat 810 and a pivoting seat 820. The fixed seat 810 is disposed on the handrail 100, specifically on the lower side of the first member 121 of the handrail 120. The pivoting seat 820 and the linkage member 510 are pivotally connected to the fixed seat 810 via a third pivot shaft 103. The handrail 900 is connected to the pivoting seat 820. Specifically, as... Figure 9As shown, the handrail 900 has a U-shaped rod structure, and both ends of the handrail 900 are connected to two pivot seats 820 respectively.

[0075] like Figure 12 and Figure 13 As shown, the fixed base 810 is a generally semi-circular shell structure. A third pivot shaft 103 is provided on the side of the fixed base 810 facing the pivot base 820. A limiting groove 811 is also provided on the side of the fixed base 810 facing the pivot base 820. The limiting groove 811 is generally an arc-shaped groove centered on the third pivot shaft 103. A pivot hole 821 opposite to the third pivot shaft 103 is provided on the side of the pivot base 820 facing the fixed base 810. The third pivot shaft 103 is inserted into the pivot hole 821 to achieve pivoting between the fixed base 810 and the pivot base 820. A limiting portion 822 is also provided on the side of the pivot base 820 facing the fixed base 810. The limiting portion 822 is inserted into the limiting groove 811 and can move along the limiting groove 811. The limiting groove 811 has a first groove end 8111 and a second groove end 8112. Figure 13 As shown, when the frame 10 is in the unfolded state, the linkage 510 abuts against the first groove end 8111. Figure 14 As shown, when the frame 10 is in the folded state, the linkage 510 abuts against the second groove end 8112. Further, the pivot seat 820 is also provided with a movable groove 823. In this embodiment, the movable groove 823 is located on the side of the pivot seat 820, connecting the side of the pivot seat 820 facing the fixed seat 810 and the side of the pivot seat 820 facing away from the fixed seat 810. At least a portion of the linkage 510 is rotatably disposed within the movable groove 823. In this embodiment, the pivot hole 821 communicates with the movable groove 823, the upper end of the linkage 510 is located within the movable groove 823, and the third pivot shaft 103 passes through the pivot hole 821 into the movable groove 823 to pivotally connect with the upper end of the linkage 510. The movable groove 823 has opposing first groove walls 8231 and second groove walls 8232. Figure 13 As shown, when the frame 10 is in the unfolded state, the linkage 510 rotates until it abuts against the first groove wall 8231. Figure 14 As shown, when the frame 10 is in the folded state, the linkage 510 rotates until it abuts against the second groove wall 8232.

[0076] Furthermore, such as Figure 13 and Figure 14 As shown, the first groove wall 8231 is located in the first rotation direction R1 of the linkage 510, and the first groove end 8111 is located in the first rotation direction R1 of the limiting part 822 (from...). Figure 13 The second groove wall 8232 is located in the second rotation direction R2 of the linkage 510, and the second groove end 8112 is located in the second rotation direction R2 of the limiting part 822 (from the perspective shown, in the counterclockwise direction); Figure 13(The view shown is clockwise). The first rotation direction R1 and the second rotation direction R2 are opposite. When the frame 10 is in the unfolded or folded position, the locking mechanism 700 is in the locked state, which locks the handlebar 120 and the linkage assembly 600, thereby locking the drive rod 123. The pivot seat 820 is locked due to the interaction between the limiting groove 811 and the limiting part 822 and the interaction between the movable groove 823 and the linkage 510, thereby locking the handrail 900 fixed at both ends to the pivot seat 820. This facilitates the use of infant carriers. Specifically, as Figure 13 As shown, when the frame 10 is in the unfolded state, because the linkage 510 abuts against the first groove wall 8231 of the movable groove 823, and the first groove wall 8231 is located in the first rotation direction R1 of the linkage 510, the pivot seat 820 cannot rotate in the opposite direction of the first rotation direction R1, that is, the pivot seat 820 cannot continue to rotate in the second rotation direction R2. At the same time, because the limiting part 822 abuts against the first groove end 8111 of the limiting groove 811, and the first groove end 8111 is located in the first rotation direction R1 of the limiting part 822, the pivot seat 820 cannot rotate in the first rotation direction R1. Thus, the pivot seat 820 is locked, thereby locking the armrest frame 900 fixed at both ends to the pivot seat 820. Figure 14 As shown, when the frame 10 is in the folded state, the linkage 510 abuts against the second groove wall 8232 of the movable groove 823, and the second groove wall 8232 is located in the second rotation direction R2 of the linkage 510, preventing the pivot seat 820 from rotating in the opposite direction of the second rotation direction R2, i.e., preventing the pivot seat 820 from continuing to rotate in the first rotation direction R1. Simultaneously, the limiting part 822 abuts against the second groove end 8112 of the limiting groove 811, and the second groove end 8112 is located in the second rotation direction R2 of the limiting part 822, preventing the pivot seat 820 from rotating in the second rotation direction R2. Thus, the pivot seat 820 is locked, thereby locking the armrests 900 fixed at both ends to the pivot seat 820.

[0077] Furthermore, such as Figure 15 As shown, the handrail frame 900 includes a handrail body 910 and two latching portions 920 connected to both ends of the handrail body 910. The two latching portions 920 respectively engage with pivot seats 820 located on both sides of the frame 10, thereby achieving a detachable connection between the handrail frame 900 and the pivot seats 820. The structure of the latching portion 920 and the corresponding pivot seat 820 is explained in detail below using one side of the frame 10 as an example:

[0078] like Figure 15As shown, the pivot seat 820 has a locking protrusion 824 on the side facing away from the fixed seat 810, and the locking portion 920 has a locking recess 921 that can be inserted and engaged with the locking protrusion 824. The locking recess 921 penetrates the end of the locking portion 920 away from the handrail body 910 to form a locking opening 924. When the handrail frame 900 is installed on the pivot seat 820, the locking protrusion 824 is inserted into the locking recess 921 through the locking opening 924. Furthermore, guide grooves 8241 are formed on the upper and lower sides of the locking protrusion 824, and guide protrusions 922 extend into the locking recess 921 from the corresponding groove wall. During the process of the locking protrusion 824 being inserted into the locking recess 921 through the locking opening 924, the guide protrusion 922 is inserted into the guide groove 8241 and moves along the guide groove 8241. Furthermore, the bottom of the engaging recess 921 is provided with a resiliently extendable mating protrusion 923, and the corresponding position of the engaging protrusion 824 is provided with a mating recess 8242. When the engaging protrusion 824 and the engaging recess 921 are engaged in place, the mating protrusion 923 is inserted into the mating recess 8242, thereby making the connection between the handrail frame 900 and the pivot seat 820 more secure.

[0079] In some embodiments, the positions of the engaging protrusion 824 and engaging recess 921 can be reversed, i.e., the engaging protrusion 824 can be located on the engaging portion 920, and the engaging recess 921 can be located on the pivot seat 820. In some embodiments, the positions of the guide groove 8241 and guide protrusion 922 can also be reversed, i.e., the guide groove 8241 is located on the engaging portion 920, and the guide protrusion 922 is located on the pivot seat 820. In some embodiments, the positions of the mating protrusion 923 and mating recess 8242 can also be reversed, i.e., the mating protrusion 923 is located on the pivot seat 820, and the mating recess 8242 is located on the engaging portion 920. In some embodiments, the guide groove 8241 and guide protrusion 922 can also be omitted. In some embodiments, the mating protrusion 923 and mating recess 8242 can also be omitted. In short, as long as a detachable connection between the handrail frame 900 and the pivot seat 820 can be achieved, the specific connection structure can be adjusted as needed.

[0080] In a further embodiment, such as Figure 16 and Figure 17As shown, the frame 10 may also include a folding strap 205. The folding strap 205 is threaded between the front wheel frame 200, the rear wheel frame 300, and the seat frame 400, and the frame 10 can be folded by pulling the folding strap 205. In this embodiment, the folding strap 205 is a webbing. In other embodiments, the folding strap 205 may also be a chain, belt, etc. Specifically, the seat frame 400 may also include a seat plate 420 mounted on the seat post 410. The seat plate 420 may be provided with a first through hole 421 and a second through hole 422 at intervals along the front-rear direction, with the first through hole 421 located in front of the second through hole 422. In this embodiment, there are two of each of the first through hole 421 and the second through hole 422, respectively located on the left and right sides of the seat plate 420. The two ends of the drawstring 205 pass through the first through holes 421 on both sides from the bottom surface of the seat plate 420 and wrap around to the top surface of the seat plate 420, and then pass through the second through holes 422 on both sides and wrap around to the bottom surface of the seat plate 420. Specifically, the front side rod 220 and the rear side rod 320 located on both sides of the frame 10 have a first fixing ring 230 and a second fixing ring 330, respectively. After the two ends of the drawstring 205 enter the bottom surface of the seat plate 420, they are then wrapped around the first fixing ring 230 and the second fixing ring 330 on the corresponding side in sequence and finally connected to the seat post 410. Specifically, the seat post 410 is provided with a fixing part 411, and the drawstring 205 is connected to the fixing part 411 of the seat post 410. In this embodiment, the fixing part 411 is a protrusion provided on the seat post 410, and the drawstring 205 is wrapped and fixed to the protrusion. In other embodiments, the fixing part 411 may be a fixing ring or hook as described above, or the fixing part 411 may not be provided, and the retractable strap 205 may be directly connected to the seat post 410 by fasteners such as rivets and screws. In this way, when the locking mechanism 700 is released, the portion of the retractable strap 205 located on the front side of the seat plate 420 can be pulled upwards, and the retractable strap 205 can facilitate the rapid folding of the seat plate 420, the front wheel frame 200, and the rear wheel frame 300. In particular, a pivot hole 423 is formed between the first through hole 421 and the second through hole 422. The fixing part 411 is located in front of the fifth pivot shaft 105, and the pivot hole 423 is located behind the fifth pivot shaft 105, that is, the fixing part 411 and the pivot hole 423 are located on the front and rear sides of the fifth pivot shaft 105, respectively. The folding strap 205 has two pulling points on the seat frame 400: one is at the fixing part 411 of the seat post 410, and the other is at the pivot hole 423 of the seat plate 420. That is, the two force application points of the folding strap 205 on the seat frame 400 are located on both sides of the fifth pivot shaft 105, allowing the seat frame 400 to be folded more easily and quickly when the folding strap 205 is pulled. In addition, when the frame 10 is in the folded state, the folding strap 205 can also be used as a carrying strap for the frame 10, making it convenient for users to carry this infant carrier.

[0081] Of course, in some embodiments, the folding strap 205 may be omitted, that is, the frame 10 is folded up by rotating the frame 100.

[0082] The following section uses the structure of one side of the frame 10 as an example to illustrate the folding and unfolding process of the frame 10 in this embodiment:

[0083] When the frame needs to be folded down, such as Figure 10 As shown, the safety release part 762 located on the rider body 110 can be pressed along the D3 direction, causing the safety release part 762 to move from the blocking position to the avoidance position. Figure 8 As shown, at this time, the operating member 740 can be pressed along the D1 direction, causing the pushing inclined surface 741 of the operating member 740 to push the first end 751 of the traction member 750 to move in the D2 direction, thereby causing the traction member 750 to drive the driving member 730 to rotate along the third rotation direction R3 through the second end 752. Figure 11 As shown. During rotation, the driving member 730 pushes against the locking teeth 711 of the locking member 710 via its driving inclined surface 731, causing the locking member 710 to move towards the bottom of the second locking groove 1252a. When the locking member 710 moves from the locked position to the unlocked position, the locking member 710 is only located within the second locking groove 1252a, and the first reset member 720 is compressed. At this time, the locking mechanism 700 releases, and the first connecting seat 124 and the second connecting seat 125 can rotate relative to each other, that is, the second rod 122, the driving rod 123, and the first rod 121 can rotate relative to each other. Figures 3 to 5 As shown, at this time it can be along the R4 direction (in Figure 3 (From the observation angle, in the counterclockwise direction) the second rod 122 is rotated, and the second rod 122 moves closer to the first rod 121 and folds. When the second rod 122 is folded to a certain extent, the drive rod 123 connected to the second rod 122 drives the first rod 121 to rotate and fold towards the rear wheel frame 300 through the four-bar linkage formed by the drive rod 123, the support rod 520, the rear rod 320 and the first rod 121. Simultaneously, during the rotation and folding process of the first link 121, the linkage assembly 600 is also rotated via the linkage 510. On one hand, the linkage 510 drives the first link 610 and the second link 620 to rotate in opposite directions, thereby causing the front and rear legs to move closer together and fold. On the other hand, the five-link structure formed by the support rod 520 located between the first pivot shaft 101 and the seventh pivot shaft 107, the first link 610, the second link 620, the third link 630, and the seat post 410 also drives the seat frame 400 to fold in a coordinated manner. Thus, the frame 10... Figure 3 The unfolded state shown Figure 4 and Figure 5 The transition state shown is switched to Figure 6 and Figure 7The folded state is shown. If the first locking groove and the second locking groove 1252a are re-aligned at this time, after releasing the operating member 740 and the safety release part 762, the locking member 710 is simultaneously located in the first locking groove and the second locking groove 1252a under the elastic restoring force of the first reset member 720, thereby realizing the re-locking of the first connecting seat 124 and the second connecting seat 125, so that the frame 10 can be locked in the folded state.

[0084] When it is necessary to unfold the frame 10, such as Figure 10 As shown, the safety release part 762 located on the rider body 110 can also be pressed along the D3 direction, causing the safety release part 762 to move from the blocking position to the avoidance position. Figure 8 As shown, at this time, the operating member 740 can be pressed along the D1 direction, causing the pushing inclined surface 741 of the operating member 740 to push the first end 751 of the traction member 750 to move in the D2 direction, thereby causing the traction member 750 to drive the driving member 730 to rotate along the third rotation direction R3 through the second end 752. Figure 11 As shown. During rotation, the driving member 730 pushes against the locking teeth 711 of the locking member 710 via its driving inclined surface 731, causing the locking member 710 to move towards the bottom of the second locking groove 1252a. When the locking member 710 moves from the locked position to the unlocked position, the locking member 710 is only located within the second locking groove 1252a, and the first reset member 720 is compressed. At this time, the locking mechanism 700 releases, and the first connecting seat 124 and the second connecting seat 125 can rotate relative to each other, that is, the second rod 122, the driving rod 123, and the first rod 121 can rotate relative to each other. Figure 6 and Figure 7 As shown, the second rod 122 can be pulled upwards at this time, and the second rod 122 can be rotated in the opposite direction of R4, causing the second rod 122 to rotate and unfold away from the first rod 121. As the second rod 122 gradually unfolds, the drive rod 123 connected to the second rod 122 drives the first rod 121 to rotate and unfold away from the rear wheel frame 300 through the four-bar linkage formed by the drive rod 123, support rod 520, rear rod 320 and the first rod 121. Simultaneously, during the rotation and unfolding of the first link 121, the linkage assembly 600 is also driven to rotate via the linkage 510. On one hand, the linkage 510 drives the first link 610 and the second link 620 to rotate away from each other, thereby causing the front wheel frame 200 and the rear wheel frame 300 to unfold away from each other. On the other hand, the five-bar linkage structure formed by the support rod 520 located between the first pivot shaft 101 and the seventh pivot shaft 107, the first link 610, the second link 620, the third link 630, and the seat rod 410 drives the seat frame 400 to unfold in a coordinated manner. Thus, the frame 10... Figure 6 and Figure 7 The unfolded state shown Figure 5and Figure 4 The transition state shown is switched to Figure 3 The vehicle frame 10 is in the unfolded state as shown. If the first locking groove and the second locking groove 1252a are repositioned at this time, after releasing the operating member 740 and the safety release part 762, the locking member 710 is simultaneously located in the first locking groove and the second locking groove 1252a under the elastic restoring force of the first reset member 720, thereby realizing the relocking of the first connecting seat 124 and the second connecting seat 125, so that the frame 10 can be locked in the unfolded state.

[0085] It is worth noting that, such as Figure 4 and Figure 5 As shown, during the folding of the frame 10, for most of the time before the second link 122 rotates in the R4 direction, because the length of the second link 122 is much greater than the length of the drive link 123, the rotation of the second link 122 does not cause a significant rotation of the first link 121. Therefore, the rotation of the second link 122 does not cause significant changes to other parts of the frame 10 structure, resulting in the front wheel frame 200 and the rear wheel frame 300 being in a tilted state for most of the time before the folding process, i.e., the frame 10 remains upright. Only when the second link 122 rotates very close to the first link 121 does the first link 121 pivot towards the rear wheel frame 300 under the action of the four-bar linkage, thereby driving the linkage assembly 600 through the linkage 510, thus causing the front wheel frame 200 and the rear wheel frame 300 to move closer to each other. Conversely, when the frame 10 is unfolded, for a short period before the second link 122 rotates in the opposite direction of R4, it causes the first link 121 and drive rod 123 to rotate significantly. Therefore, at this time, the linkage 510 drives the connecting rod assembly 600, causing the front wheel frame 200 and rear wheel frame 300 to unfold away from each other, allowing the frame 10 to quickly reach an upright position. For most of the time afterward, the frame 10 remains upright while the second link 122 is unfolded relative to the first link 121. This slow-folding and fast-folding characteristic of the frame 10 ensures that it remains in a self-supporting upright position for most of the time during both folding and unfolding processes, making the folding and unfolding of the frame 10 more convenient and effortless.

[0086] Furthermore, during the unfolding and folding process, the front wheel frame 200, rear wheel frame 300, and seat frame 400 are driven by the drive rod 123 to unfold and fold. The linkage 510 extends from the first rod 121 to the connecting rod assembly 600 located between the front wheel frame 200 and the rear wheel frame 300. It has a relatively long overall stroke and is driven by the first rod 121, which is much longer than the linkage 510. This increases the driving torque acting on the fourth pivot shaft 104, thereby making the unfolding and folding process of the frame 10 more effortless.

[0087] Second Embodiment

[0088] like Figure 18 and Figure 19 As shown, the second embodiment of the present invention provides an infant carrier, such as an infant stroller. Similar to the first embodiment, the infant carrier includes a foldable frame 10 and a seat cover (not shown in the figures) covering the frame 10. The frame 10 and the infant carrier have a simple structure, and the unfolding or folding process is time-saving and labor-saving, making them convenient to use. The foldable frame 10 in the unfolded state (e.g., Figures 18 to 20 (as shown) and closed state (as shown) Figure 23 and Figure 24 You can switch between the two (as shown). Figure 21 and Figure 22 The diagram shows the frame 10 in a transitional state between its extended and retracted states. Similar to the first embodiment, the frame 10 in this embodiment also includes a handlebar frame 100, a front wheel frame 200, a rear wheel frame 300, a linkage 510, a linkage assembly 600, and a support rod 520. The structures of the handlebar frame 100, front wheel frame 200, rear wheel frame 300, linkage 510, and support rod 520 in this embodiment are largely the same as those in the first embodiment. The main difference between this embodiment and the first embodiment lies in the linkage assembly 600.

[0089] Please see also Figure 20 and Figure 25In this embodiment, the linkage assembly 600 includes a first linkage 610 and a fourth linkage 640. The first linkage 610 is pivotally connected to the rear wheel carrier 300 via a first pivot shaft 101. The fourth linkage 640 is pivotally connected to the front wheel carrier 200 via a second pivot shaft 102. The linkage member 510 is pivotally connected to the rider frame 100 via a third pivot shaft 103, and the linkage member 510 is pivotally connected to the first linkage 610 and the fourth linkage 640 via a fourth pivot shaft 104. The fourth linkage 640 is connected to the seat frame 400 via a first connection point A and a second connection point B, which are spaced apart. Specifically, the first linkage 610 is a straight rod. The rear end of the first linkage 610, the lower end of the support rod 520, and the rear side rod 320 are pivotally connected to the first pivot shaft 101. The fourth link 640 has a U-shaped structure, including a first pivot portion 641, a second pivot portion 642, and a connecting portion 643 connecting the first pivot portion 641 and the second pivot portion 642. The connection between the first pivot portion 641 and the connecting portion 643 is pivotally connected to the front wheel frame 200 (specifically to the front side rod 220) via a second pivot shaft 102. The connection between the second pivot portion 642 and the connecting portion 643 is pivotally connected to the first link 610 via a fourth pivot shaft 104. The end of the first pivot portion 641 away from the connecting portion 643 is connected to the seat frame 400 (specifically to the seat post 410) at a first connection point A, and the end of the second pivot portion 642 away from the connecting portion 643 is connected to the seat frame 400 (specifically to the seat post 410) at a second connection point B. The first connection point A is located in front of the second connection point B. In this embodiment, the fourth link 640 and the seat post 410 are respectively connected to the first connection point A and the second connection point B. The fourth link 640 and the seat post 410 can be regarded as a whole. This facilitates the quick and effortless folding and unfolding of the seat frame 400, and also allows the seat frame 400 to receive more stable support when the frame 10 is in the unfolded state, thereby increasing the overall stability of the frame 10 under load and facilitating the installation of the seat frame 400. In addition, by setting the first pivot part 641 and the second pivot part 642 to be connected to the seat frame 400 at the first connection point A and the second connection point B respectively, it is convenient to adjust the position of the seat frame 400 relative to the frame 10, that is, to adjust the overall center of the frame 10, thereby improving the pushing stability of the frame 10.

[0090] Furthermore, similar to the first embodiment, the frame 10 in this embodiment also includes a locking mechanism 700, a pivoting mechanism 800, and a handrail frame 900. The structure and connection relationship of the locking mechanism 700, the pivoting mechanism 800, and the handrail frame 900 in this embodiment are basically the same as those in the first embodiment, so they will not be described again here.

[0091] The following describes the folding and unfolding process of the frame 10 in this embodiment using the structure of one side of the frame 10 as an example. Since the locking mechanism 700 in this embodiment is similar to that in the first embodiment, the operation process of the locking mechanism 700 will not be described again.

[0092] When the frame needs to be folded down, such as Figure 20 As shown, the locking / unlocking mechanism 700, along the R4 direction (in... Figure 20 From the observation angle (counterclockwise), the second rod 122 rotates, causing it to fold closer to the first rod 121. When the second rod 122 folds to a certain extent, the drive rod 123 connected to the second rod 122, through the four-bar linkage formed by the drive rod 123, support rod 520, rear rod 320, and first rod 121, drives the first rod 121 to rotate and fold closer to the rear wheel frame 300. Simultaneously, during the rotation and folding process of the first rod 121, the linkage assembly 600 also rotates through the linkage 510. On one hand, the linkage 510 drives the first link 610 and the fourth link 640 to rotate towards each other, thereby causing the front wheel frame 200 and the rear wheel frame 300 to fold closer to each other. On the other hand, the fourth link 640 also drives the seat frame 400 connected to it to fold. Thus, the frame 10... Figure 20 The unfolded state shown Figure 21 and Figure 22 The transition state shown is switched to Figure 23 and Figure 24 The frame 10 is shown in the folded state. Simultaneously, the frame 10 is locked in the folded state via the locking mechanism 700.

[0093] When it is necessary to unfold the frame 10, such as Figure 23 and Figure 24 As shown, the locking and unlocking mechanism 700 can pull the second rod 122 upwards and rotate it in the opposite direction of R4, causing it to rotate and unfold away from the first rod 121. As the second rod 122 gradually unfolds, the drive rod 123 connected to it, through a four-bar linkage formed by the drive rod 123, support rod 520, rear rod 320, and the first rod 121, drives the first rod 121 to rotate and unfold away from the rear wheel frame 300. Simultaneously, during the rotation and unfolding of the first rod 121, the linkage assembly 600 is also rotated via the linkage 510. On one hand, the linkage 510 drives the first link 610 and the fourth link 640 to rotate away from each other, thereby causing the front wheel frame 200 and the rear wheel 300 to unfold away from each other. On the other hand, the fourth link 640 also drives the seat frame 400 connected to it to unfold in a coordinated manner. Thus, the frame 10... Figure 23 and Figure 24 The unfolded state shown Figure 22 and Figure 21 The transition state shown is switched to Figure 20 The vehicle frame 10 is shown in the unfolded state. Simultaneously, the frame 10 is locked in the unfolded state via the locking mechanism 700.

[0094] For reasons similar to the first embodiment, the frame 10 in this embodiment also features slow folding and fast unfolding, ensuring that the frame 10 remains in a self-supporting upright state for most of the time during both folding and unfolding processes, making the folding and unfolding of the frame 10 more convenient and effortless. Simultaneously, during the unfolding and folding process, the front wheel frame 200, rear wheel frame 300, and seat frame 400 are driven by the drive rod 123 to achieve unfolding and folding. The linkage 510 extends from the first rod 121 to the connecting rod assembly 600 located between the front wheel frame 200 and the rear wheel frame 300, with a relatively long overall stroke and driven by the first rod 121, which is much longer than the linkage 510. This increases the driving torque acting on the fourth pivot shaft 104, thus making the folding and unfolding process of the frame 10 more effortless.

[0095] Third Embodiment

[0096] like Figure 26 As shown, the third embodiment of the present invention proposes an infant carrier, such as an infant stroller. The main difference between the infant carrier in this embodiment and the infant carrier in the first embodiment lies in the connection method between the armrest 900 and the support frame 1010, and the setting position of the seat frame 400. Apart from this, the infant carrier in this embodiment is basically the same as the infant carrier in the first embodiment.

[0097] like Figure 27 As shown, in this embodiment, the handrail frame 900 includes a handrail body 910 and two snap-fit ​​portions 920 connected to both ends of the handrail body 910. The two snap-fit ​​portions 920 respectively engage with pivot joints 303 located on both sides of the frame 10, thereby achieving a detachable connection between the handrail frame 900 and the pivot joints 303. The following describes the engagement between the snap-fit ​​portions 920 and the corresponding pivot joints 303 using one side of the frame 10 as an example:

[0098] like Figure 27 As shown, the T-shaped pivot joint 303 has a locking groove 3032 at approximately its center, which can be inserted and engaged with the locking part 920. The locking groove 3032 extends approximately along the extension direction of the rear rod 320 and passes through the upper end of the pivot joint 303 to form a locking interface 3033. When the handrail 900 is installed on the pivot joint 303, the locking part 920 is inserted into the locking groove 3032 via the locking interface 3033. Furthermore, the bottom of the locking groove 3032 is also provided with a locking recess 3034. One side of the locking part 920 (the outer side in this embodiment) is provided with a corresponding elastically retractable locking protrusion 925. When the locking part 920 is engaged in place in the locking groove 3032, the locking protrusion 925 is inserted into the locking recess 3034, thereby making the connection between the handrail 900 and the pivot joint 303 more secure.

[0099] In some embodiments, the positions of the latching portion 920 and the latching groove 3032 can also be reversed, that is, the latching portion 920 can be disposed on the pivot joint 303, and the latching groove 3032 can be disposed on the handrail frame 900. In some embodiments, the positions of the locking recess 3034 and the locking protrusion 925 can also be reversed, that is, the locking recess 3034 is disposed on the latching portion 920, and the locking protrusion 925 is disposed on the bottom of the latching groove 3032. In some embodiments, the locking recess 3034 and the locking protrusion 925 can also be omitted. In short, as long as a detachable connection between the handrail frame 900 and the pivot joint 303 can be achieved, the specific connection structure can be adjusted as needed.

[0100] In this embodiment, the two ends of the armrest 900 are directly and detachably connected to the pivot joint 303, eliminating the need for an additional pivot mechanism 800 as in the infant carrier in the second embodiment. This simplifies the components and facilitates manufacturing. Furthermore, since the snap-fit ​​parts 920 at both ends of the armrest 900 are directly embedded in the groove structure of the pivot joint 303, the lateral dimension of the infant carrier's seating space (which can be understood as the space enclosed by the armrest 900 and the seat frame 400 for infants to sit in) is increased, making it more convenient for infants to sit.

[0101] In this embodiment, the height of the seat frame 400 is lower than that of the seat frame 400 in the second embodiment, thereby increasing the seating space and lowering the overall center of gravity of the infant vehicle, resulting in greater stability. In this embodiment, the vertical dimensions of the first pivot portion 641 and the second pivot portion 642 of the fourth link 640 are smaller than those in the second embodiment, thus reducing the height of the seat frame 400 in this embodiment.

[0102] In this embodiment, the upper end of the linkage 510 is directly pivotally connected to the first link 121 of the handlebar 120 via the third pivot shaft 103, without the need for pivot connection to the first link 121 of the handlebar 120 via the pivot mechanism 800 as in the second embodiment.

[0103] It should be understood that the connection method between the armrest frame 900 and the support frame 1010 in this embodiment, as well as the setting position of the seat frame 400, can also be applied to the vehicle frame 10 in the first embodiment.

[0104] The vehicle frame 10 and infant carrier proposed in this invention have at least the following technical effects:

[0105] In the aforementioned frame 10, the linkage assembly 600 connects the support frame 1010 and the seat frame 400, and the linkage member 510 connects the support frame 1010 and the linkage assembly 600. Thus, when the support frame 1010 folds, the linkage member 510 drives the linkage assembly 600 to actuate, thereby causing the seat frame 400 to pivot and fold. The cooperation between the linkage member 510 and the linkage assembly 600 makes the entire frame 10 structurally simple, and the unfolding and folding processes are relatively time-saving and labor-saving. Furthermore, the folding of the support frame 1010 can also trigger the folding of the seat frame 400, making it convenient to use.

[0106] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0107] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A vehicle frame, characterized in that, It includes a support frame, a seat frame, a linkage component, and a linkage assembly. The linkage assembly is connected to the support frame and the seat frame. One end of the linkage component is connected to the support frame, and the other end of the linkage component is connected to the linkage assembly. When the support frame is folded, it can drive the linkage assembly through the linkage component, thereby causing the seat frame to pivot and fold.

2. The frame according to claim 1, characterized in that, The support frame includes a rider frame, a front wheel frame, and a rear wheel frame, which are pivotally connected to each other. The linkage assembly includes: The first link is pivotally connected to the rear wheel frame via a first pivot shaft; and The fourth link is pivotally connected to the front wheel frame via the second pivot shaft; The linkage is pivotally connected to the rider frame via a third pivot shaft, the linkage is pivotally connected to the first link and the fourth link via a fourth pivot shaft, the fourth link is connected to the seat frame via a first connection point and a second connection point, and the first connection point and the second connection point are spaced apart.

3. The frame according to claim 2, characterized in that, The fourth link has a U-shaped structure, including a first pivot part, a second pivot part, and a connecting part connecting the first pivot part and the second pivot part. The connection between the first pivot part and the connecting part is pivotally connected to the front wheel frame via a second pivot shaft. The connection between the second pivot part and the connecting part is pivotally connected to the first link via a fourth pivot shaft. The end of the first pivot part away from the connecting part is connected to the seat frame at a first connection point. The end of the second pivot part away from the connecting part is connected to the seat frame at a second connection point.

4. The frame according to claim 1, characterized in that, The support frame includes a rider frame, a front wheel frame, and a rear wheel frame, which are pivotally connected to each other. The linkage assembly includes: The first link is pivotally connected to the rear wheel frame via the first pivot shaft; The second link is pivotally connected to the front wheel frame via a second pivot shaft; and The third link is pivotally connected to the seat frame via the fifth pivot shaft; The linkage is pivotally connected to the rider frame via a third pivot shaft, the linkage is pivotally connected to the first link and the second link via a fourth pivot shaft, and the third link, the second link and the front wheel frame are pivotally connected to the second pivot shaft.

5. The frame according to claim 2 or 4, characterized in that, The chassis also includes: The support rod is pivotally connected to the rider frame via a sixth pivot shaft, and the support rod is also pivotally connected to the first connecting rod and the rear wheel frame via the first pivot shaft.

6. The frame according to claim 4, characterized in that, The chassis also includes: The support rod is pivotally connected to the rider frame via a sixth pivot shaft, and the support rod is also pivotally connected to the first connecting rod and the rear wheel frame via the first pivot shaft; The support rod is also pivotally connected to the seat frame via a seventh pivot shaft, which is located between the first pivot shaft and the sixth pivot shaft. The support rod, the first connecting rod, the second connecting rod, the third connecting rod, and the seat frame form a five-bar linkage structure.

7. The frame according to claim 1, characterized in that, The vehicle frame also includes a pivoting mechanism, which is located on the support frame. The linkage is pivotally connected to the third pivot shaft through the pivoting mechanism. The vehicle frame also includes a handrail frame, which is connected to the pivoting mechanism.

8. The frame according to claim 7, characterized in that, The pivoting mechanism includes a fixed seat and a pivoting seat. The fixed seat is fixed to the support frame. The pivoting seat and the linkage are pivotally connected to the fixed seat through a third pivoting shaft. The handrail frame is connected to the pivoting seat.

9. The frame according to claim 1, characterized in that, The support frame includes a handrail, a front wheel frame, a rear wheel frame, and a pivot joint. The handrail, the front wheel frame, and the rear wheel frame are pivotally connected to each other via the pivot joint. The frame also includes a handrail frame, which is connected to the pivot joint.

10. The frame according to claim 2 or 4, characterized in that, The frame also includes a folding strap, which passes between the front wheel frame, the rear wheel frame and the seat frame. The frame can be folded by pulling the folding strap.

11. The frame according to claim 10, characterized in that, The seat frame includes a seat post and a seat plate. The seat post is supported below the seat plate, which is used to support infants and young children. One end of the folding strap is connected to the seat post, and the other end passes through the rear wheel frame, the front wheel frame, and the seat plate in sequence. When the frame is folded, the folding strap can be used as a carrying strap for the frame.

12. An infant carrier, characterized in that, Includes the frame as described in any one of claims 1 to 11.

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