Stroller

Abstract

A stroller with a double-person riding mode and a single-person riding mode includes a frame (100), a first connecting base (200), a first locking mechanism (600) and a limiting mechanism (700). The first connecting base is configured to support a first carrying body (400) and is movably disposed on the frame. When the first locking mechanism (600) is in a locked state, the height position of the first connecting base (200) is locked relative to the frame. When the first locking mechanism (600) is in an unlocked state, the first connecting base (200) is unlocked relative to the frame. When the limiting mechanism (700) is in a first state, the movement of the first connecting base from the single-person height position to the double-person height position is limited. When the limiting mechanism (700) is in a second state, the first connecting base is allowed to beswitched between the single-person height position and the double-person height position.

Description

STROLLERTECHNICAL FIELD

[0001] The present disclosure relates to the technical field of child carriers, in particular to a stroller.BACKGROUND

[0002] At present, strollers that are switchable between a double-person riding mode and a single-person riding mode are more and more popular among consumers on the market. In order to provide a mounting space for a second carrying body, a height of a first carrying body is generally adjustable. When a stroller is switched from the singleperson riding mode to the double-person riding mode, the first carrying body needs to be moved to a rear and upper part of the stroller, and a gravity center of the first carrying body of the stroller is shifted backward. In the double-person riding mode, an overall gravity center of the stroller remains within a predetermined range when the stroller is.

[0003] However, when the conventional stroller is used in the single-person riding mode, it is easy for users to move the first carrying body to a higher position, which may cause the overall gravity center of the stroller in the single-person riding mode to be shifted backward, resulting in a risk of the stroller tipping backward in the single-person riding mode.SUMMARY

[0004] Accordingly, it is necessary to provide a stroller that is switchable between a double-person riding mode and a single-person riding mode, and has a low risk of tipping.

[0005] According to one aspect, the present disclosure provides a stroller having a double-person riding mode and a single-person riding mode, which includes a frame, afirst connecting base, a first locking mechanism and a limiting mechanism. The first connecting base is configured to support the first carrying body. The first connecting base is movably disposed on the frame, and a height position of the first connecting base relative to the frame is adjustable. When the stroller is in the double-person riding mode, the first connecting base is in a double-person height position, and when the stroller is in the single-person riding mode, the first connecting base is in a single-person height position. The first locking mechanism is switchable between a locked state and an unlocked state. When the first locking mechanism is in the locked state, the height position of the first connecting base is locked relative to the frame, and when the first locking mechanism is in the unlocked state, the first connecting base is unlocked relative to the frame is released. The limiting mechanism is switchable between a first state and a second state. When the limiting mechanism is in the first state, the movement of the first connecting base from the single-person height position to the double-person height position is limited, and when the limiting mechanism is in the second state, the first connecting base is allowed to be switched between the single-person height position and the double-person height position.

[0006] Further, when the limiting mechanism is in the first state, the limiting mechanism collaborates with the first locking mechanism to lock the first connecting base in the double-person height position.

[0007] Further, the first connecting base has a positioning hole. When the first connecting base is in the double-person height position, the limiting mechanism is adapted to be inserted in the positioning hole and switched to the first state to lock the first connecting base in the double-person height position, and when the limiting mechanism exits from the positioning hole and is switched to the second state, the limiting mechanism unlock the first connecting base from the double-person height position.

[0008] Further, the limiting mechanism includes a limiting member and a reset elastic member. The limiting member is movably disposed on the frame and switchable between a first position and a second position. When the limiting member is in the first position, the limiting mechanism is in the first state, and when the limiting member is in the second position, the limiting mechanism is in the second state. The reset elastic member applies a force to the limiting member to move toward the first position.

[0009] Further, the frame includes a first guide rail. The first connecting base is slidable along the first guide rail. A first mounting groove and a through hole in communication with the first mounting groove are disposed in the first guide rail, and agroove bottom of the first mounting groove is hollowed out. When the limiting member is in the first position, the limiting member is adapted to protrude from a surface of the first guide rail through the through hole, and when the limiting member is in the second position, the limiting member is adapted to be retracted into the first mounting groove through the through hole. Two ends of the reset elastic member respectively abut the limiting member and the frame.

[0010] Further, the first connecting base is provided with a locking member. The frame is provided with a plurality of first locking holes spaced apart from each other along a length direction of the first guide rail. The plurality of first locking holes at least include more than one high-area locking holes, and when the locking member is engaged with the high-area locking hole, the first connecting base is in the double-person height position.

[0011] Further, the high-area locking hole is located above the through hole.

[0012] Further, the first connecting base includes an operating portion, and when the first locking mechanism is in the locked state, the operating portion is operatable to cause the first connecting base to slide along the first guide rail.

[0013] Further, the first connecting base has a positioning hole, and when the first connecting base is in the double-person height position, the positioning hole cooperates with the limiting member of the limiting mechanism to lock the first connecting base.

[0014] Further, the operating portion is located above the positioning hole, and / or the first locking mechanism is mounted on the operating portion.

[0015] Further, the first locking mechanism includes a first locking member and a first elastic member. The first locking member is movably disposed on the first connecting base and switchable between a first locking position and a first unlocking position. When the first locking member is in the first locking position, the first locking mechanism is in the locked state, and when the first locking member is in the first unlocking position, the first locking mechanism is in the unlocked state. The first elastic member applies a force to the first locking member, to move toward the first locking position.

[0016] Further, the first locking mechanism further includes a first unlocking operating member operably disposed in the first connecting base, and the first unlocking operating member is adapted to be operated to drive the first locking member to move toward the first unlocking position.

[0017] Further, the first locking member and the first connecting base are pivotally connected to a first pivot point. The first locking member has a locking hook on a side of the first pivot point. When the first locking member is in the first locking position, thelocking hook is capable of being engaged with the frame, and another side of the first locking member is adapted to bear force, so that the locking hook is disengaged from the frame.

[0018] Further, a plurality of first locking holes are provided on the frame. When the first locking member is in the first locking position, the first locking member is adapted to be engaged with one of the plurality of first locking holes, and when the first locking member is in the first unlocking position, the first locking member is adapted to be disengaged from the plurality of first locking holes.

[0019] Further, the plurality of first locking holes includes at least one high-area locking hole and at least one low-area locking hole. When the first locking member is engaged with one of the at least one high-area locking hole, the first connecting base is in the double-person height position. When the first locking member is engaged with one of the at least one low-area locking hole, the first connecting base is in the single-person height position.

[0020] Further, the frame includes a first guide rail, and the first connecting base is slidable along the first guide rail. The plurality of first locking holes are spaced apart from each other in a length direction of the first guide rail, and the at least one high-area locking hole is located above the at least one low- area locking hole.

[0021] Further, a spacing between two adjacent low- area locking holes of the plurality of low-area locking holes is different from a spacing between the high-area locking hole and the low-area locking hole adjacent to each other.

[0022] Further, the stroller further includes a first carrying body having a first carrying space. The first carrying body is configured to be mounted on the first connecting base.

[0023] Further, each of a left side and a right side of the frame is provided with the first connecting base, and each of a left side and a right side of the first carrying body is removably connected to the corresponding first connecting base. Each of the first connecting bases is capable of being locked by a corresponding first locking mechanism and the movement of the first connecting bases from the single-person height position to the double-person height position is limited by the corresponding limiting mechanism.

[0024] Further, the stroller further includes a second connecting base configured to support the second carrying body. The second connecting base is disposed on the frame and located below the first connecting base.

[0025] Further, the frame includes a second guide rail. The second connecting base isslidable along the second guide rail between a used position and a storage position, and the used position is located in front of the storage position.

[0026] Further, the stroller further includes a second carrying body having a second carrying space. The second carrying body is removably connected to the second connecting base.

[0027] Further, the second connecting base includes a pivot base, a connecting base body, and a third locking mechanism. The pivot base is mounted on the frame. The connecting base body is pivotally connected to the pivot base to be able to be rotated to the used position or the storage position. When the connecting base body is in the used position, the connecting base body is adapted to be connected to the second carrying body. The third locking mechanism has a locked state in which the connecting base body is locked to the used position, and an unlocked state in which the locking of the connecting base body is released.

[0028] Further, a peripheral wall of the pivot base is provided with a third locking hole. The third locking mechanism is disposed on the connecting base body. The third locking mechanism includes a third locking member, and the third locking member has a third locking position where the third locking member is adapted to be inserted into the third locking hole and a third unlocking position where the third locking member is adapted to exit from the third locking hole.

[0029] Further, the pivot base and the connecting base body are pivotally connected via a first pivot shaft, and the third locking member is extendable and retractable in a direction perpendicular to an axis of the first pivot shaft to be switched between the third locking position and the third unlocking position; and / or the third locking mechanism further includes a third elastic member, and the third elastic member applies a force to the third locking member that moves he third locking member toward the third locking position.

[0030] Further, the connecting base body includes a first sliding groove slidably matched with the third locking member, and a locking portion ofthe third locking member is capable of protruding from a port of the first sliding groove to be inserted into the third locking hole. The third locking mechanism further includes a third unlocking member operably connected to the third locking member, and the third unlocking member is configured to drive the third locking member to move to the third locking position.

[0031] Further, at least one wall body of the first sliding groove is provided with an opening, and the third unlocking member extends from the third locking member andpasses through from the opening.

[0032] Further, a peripheral wall of the pivot base includes a first support surface, and the connecting base body includes a second support surface. When the connecting base body is in the used position, the first support surface supports the second support surface, and the third locking hole is disposed on the first support surface.

[0033] Further, at least one of the first support surface and the second support surface is provided with at least one support convex.

[0034] Further, the pivot base includes an arc-shaped surface providing with a limiting convex. When the connecting base body pivots from the used position to the storage position, the third locking member abuts the limiting convex after crossing the limiting convex to retain the connecting base body in the storage position.

[0035] Further, the connecting base body pivots in a left-right direction relative to the pivot base to rotate to the used position or the storage position.

[0036] Further, an angle at which the connecting base body pivots between the used position and the storage position is greater than 90 degrees.

[0037] Further, the pivot base and the connecting base body are pivotally connected via a first pivot shaft. When the connecting base body is switched between the used position and the storage position, the third locking member is switched between a left side and a right side of the first pivot shaft.

[0038] According to another aspect, the present disclosure further provides a stroller, which includes a seat assembly, an armrest support rod, a backrest support rod, a fifth locking mechanism and a linkage mechanism. The seat assembly includes a seat body and a side baffle located on a side of the seat body. The armrest support rod and the side baffle are pivotally connected to a second pivot point, so that armrest support rod is capable of being moved between a folded position and an unfolded position. The backrest support rod and the side baffle are pivotally connected to a third pivot point, so that backrest support rod is capable of being moved between a folded position and an unfolded position. The fifth locking mechanism is configured to lock the armrest support rod in an unfolded state. The linkage mechanism is disposed between the backrest support rod and the fifth locking mechanism, wherein when being driven by the backrest support rod, the linkage mechanism drives the fifth locking mechanism to unlock the armrest support rod.

[0039] Further, the fifth locking mechanism includes a fifth locking member and a locking fastener. The locking fastener is connected to the armrest support rod, and a fifth locking hole is disposed on a peripheral wall of the locking fastener. The fifth lockingmember is operatively connected to the linkage mechanism, and the fifth locking member has a fifth locking position where the fifth locking member is inserted into the fifth locking hole and a fifth unlocking position where the fifth locking member exits from the fifth locking hole.

[0040] Further, the fifth locking member is mounted in a second sliding groove. The locking fastener has a first rotational position and a second rotational position. When the armrest support rod is in the unfolded position, the locking fastener is in the first rotational position, and the fifth locking hole is opposite to the fifth locking member. When the armrest support rod is in the folded position, the locking fastener is in the second rotational position, and the fifth locking hole is staggered from the fifth locking member.

[0041] Further, the fifth locking mechanism includes a first reset member and a second reset member. The first reset member applies a force to the fifth locking member to move toward the fifth locking position, and the second reset member applies a force to the locking fastener to move toward the first rotational position.

[0042] Further, the linkage mechanism includes a first transmission member, a second transmission member, and a traction member. The first transmission member is mounted on the second transmission member, the second transmission member is capable of rotating around the third pivot point, and two ends of the traction member are respectively connected to the second transmission member and the fifth locking member. When the backrest support rod is moved to a folded position, the backrest support rod presses the first transmission member, so as to drive the second transmission member to rotate, and drives the fifth locking member to a fifth unlocking position via the traction member.

[0043] Further, the side baffle is provided with a first arc-shaped hole limiting a range of pivoting of the first transmission member.

[0044] Further, the backrest support rod is pivotally connected to the third pivot point via the driving member. A second arc-shaped hole is provided in the driving member. A length of the second arc-shaped hole is greater than that of the first arc-shaped hole, and the second arc-shaped hole is in slidably matched with the first transmission member, and is capable of driving the first transmission member to rotate.

[0045] Further, an aperture of the first arc-shaped hole is greater than an aperture of the second arc-shaped hole. The first transmission member includes a mounting column and a connecting column. The mounting column is in slidably matched with the first arc-shaped hole, and the connecting column is mounted in a center hole of the mounting column and is in slidably matched with the second arc-shaped hole.BRIEF DESCRIPTION OF THE DRAWINGS

[0046] FIG. 1 is a schematic diagram of a stroller according to a first embodiment of the present disclosure, where the stroller is in a single-person riding mode;

[0047] FIG. 2 is a schematic diagram of a stroller according to a first embodiment of the present disclosure, where the stroller is in a double-person riding mode;

[0048] FIG. 3 is an exploded view of the stroller shown in FIG. 2;

[0049] FIG. 4 is a schematic diagram of the stroller shown in FIG. 1, where a first carrying body is removed, and a second connecting base is in a storage position;

[0050] FIG. 5 is a sectional view taken along a line A-A shown in FIG. 4 and a portion of FIG. 5 marked in a broken line is shown by an enlarged view;

[0051] FIG. 6 is another schematic diagram of the stroller shown in FIG. 4 and a portion of FIG. 6 marked by a broken line is shown by an enlarged view, where a first connecting base is moved a certain distance in a first direction and a second connecting base is in a used position;

[0052] FIG. 7 is a sectional view taken along line B-B in FIG. 6;

[0053] FIG. 8 is a schematic diagram of a stroller shown in FIG. 2, where the first carrying body and the second carrying body are removed, the second connecting base is in a used position, and a portion of FIG. 8 marked by a broken line is shown by an enlarged view;

[0054] FIG. 9 is a sectional view taken along line C-C in FIG. 8;

[0055] FIG. 10 is a partial exploded view of the stroller shown in FIG. 4 and a portion of FIG. 10 marked in a broken line is shown by an enlarged view;

[0056] FIG. 11 is a schematic diagram of a stroller according to another embodiment of the present disclosure, where the stroller is in the double-person riding mode;

[0057] FIG. 12 is an exploded view of the stroller shown in FIG. 11;

[0058] FIG. 13 is a schematic diagram of a stroller according to a second embodiment of the present disclosure, where the first carrying body and the second carrying body are separated from a frame;

[0059] FIG. 14 is a schematic diagram of a stroller shown in FIG. 13, where the stroller is in the double-person riding mode;

[0060] FIG. 15 is a schematic diagram of a stroller in the single-person riding mode shown in FIG. 13, where the second connecting base is in an storage position;

[0061] FIG. 16 is a perspective view of the frame shown in FIG. 13, where the second connecting base is in a used position;

[0062] FIG. 17 shows an exploded view of the second connecting base shown in FIG. 16;

[0063] FIG. 18 and FIG. 19 show sectional views of a second connecting base in a used position and a storage position respectively. For ease of description, an end cover is not shown in FIG. 18 and FIG. 19.

[0064] FIG. 20 shows a sectional view taken along U1-U1 line in FIG. 14;

[0065] FIG. 21 and FIG. 22 are perspective views from different perspectives, showing the second carrying body in FIG. 13 in an unfolded state;

[0066] FIG. 23 shows a partial exploded view of the second carrying body shown in FIG. 21 and FIG. 22;

[0067] FIG. 24 shows a sectional view of the second carrying body taken along line U2-U2 shown in FIG. 22;

[0068] FIG. 25 shows a side view of the second carrying body in a folded state shown in FIG. 21 and FIG. 22; and

[0069] FIG. 26 shows a sectional view of the second carrying body shown in FIG. 25.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0070] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following further describes the present disclosure in detail with reference to the accompanying drawings and specific implementations. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, and do not limit the protection scope of the present disclosure.

[0071] It should be understood that when an element is defined as “fixed to” another element, it is either directly on an element or indirectly on an element with a mediating element. When an element is considered to be "connected to" another element, it can be directly connected to another element or indirectly connected to another element with a mediating element. The terms "vertical", "horizontal", "left", "right", and the like used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0072] All technical and scientific terms used herein have the same meaning ascommonly understood by skilled person in the art to which the present disclosure belongs, unless otherwise defined. The terms used in the specification of the present disclosure herein are for the purpose of describing specific examples only and are not intended to restrict the present disclosure. The term "and / or" as used herein includes any and all combinations of one or more associated listed items.

[0073] First embodiment

[0074] As shown in FIG. 1 and FIG. 2, a first embodiment of the present disclosure provides a stroller is switchable between a single-person riding mode (referring to FIG. i) and a double-person riding mode (referring to FIG. 2) and has a low risk of tipping. The stroller includes a frame too, a first connecting base 200, a second connecting base 300, a first cariying body 400, a second carrying body 500, a first locking mechanism 600 (referring to FIG. 5), a limiting mechanism 700 (referring to FIG. 5), and a shockabsorbing mechanism 800.

[0075] As shown in FIG. 1, when the stroller is in the single-person riding mode, for example, the first carrying body 400 is removably mounted on the first connecting base 200, so as to be mounted on the frame too via the first connecting base 200. The first carrying body 400 has a first carrying space for supporting a child. The second carrying body 500 is separated from frame too.

[0076] As shown in FIG. 2, when the stroller is in the double-person riding mode, for example, the first carrying body 400 is removably mounted on the first connecting base 200, so as to be mounted on the frame too via the first connecting base 200. For example, the second carrying body 500 is removably mounted on the second connecting base 300, so as to be mounted on the frame too via the second connecting base 300. The second carrying body 500 has a second carrying space for supporting the child.

[0077] The first connecting base 200 is movably disposed on the frame too and a height position of the first connecting base 200 relative to the frame too is adjustable. The first connecting base 200 has at least two working positions with different heights relative to the frame too. These working positions include double-person height positions and single-person height positions. When the stroller is in the double-person riding mode, the first connecting base 200 is in the appropriate double-person height position. When the stroller is in the single-person riding mode, the first connecting base 200 is in the appropriate single-person height position. In this embodiment, when the stroller is in the single-person riding mode, the first connecting base 200 supports the first carrying body 400 at a lower position, so as to reduce a height of gravity center of the first carrying body400, and the stroller can safely and reliably support one child. When the stroller is in the double-person riding mode, the first connecting base 200 supports the first carrying body 400 at a higher position to leave enough mounting space for the second carrying body 500. In this case, although the gravity center of the first carrying body 400 is raised, the gravity center of the second carrying body 500 located below the first carrying body 400 is low, so that the stroller can still safely and reliably support two persons.

[0078] It may be understood that a working position / working positions of the plurality of working positions on an upper position is / are more suitable as the doubleperson height position / positions, and a working position / working positions of the plurality of working positions on a lower position is / are more suitable as the singleperson height position / positions. Certainly, when the stroller is in the single-person riding mode, the first connecting base 200 may be connected to any one of the plurality of working positions as required.

[0079] The first locking mechanism 600 is switchable between a locked state and an unlocked state. When the first locking mechanism 600 is in the locked state, the first connecting base 200 is fixed at one of the working positions relative to the frame too. When the first locking mechanism 600 is in the unlocked state, the height of the first connecting base 200 relative to the frame too is adjustable.

[0080] The limiting mechanism 700 is switchable between a first state and a second state. When the limiting mechanism 700 is in the first state, the limiting mechanism 700 limits the first connecting base 200 from performing height adjustment relative to the frame too. For example, the movement of the first connecting base 200 from the singleperson height position to the double-person height position or from the double-person height position to the single-person height position is limited. When the limiting mechanism 700 is in the second state, the limiting mechanism 700 allows the first connecting base 200 to perform height adjustment relative to the frame too. For example, the first connecting base 200 is allowed to be switched between the single-person height position and the double-person height position.

[0081] The shock-absorbing mechanism 800 is provided on the frame too to cushion the vibration of the stroller during use, so as to improve the comfort of the children ride.

[0082] As shown in FIG. 3 and FIG. 4, the frame too may include a handle frame 110, a front support frame 120, a rear support frame 130, and a wheel assembly 140.

[0083] Both the handle frame 110 and the front support frame 120 are formed as a Ilshaped frame structure, and two end portions of the handle frame 110 and two endportions of the front support frame 120 are connected to form a rectangular frame structure. When the stroller is in the unfolded state, the rectangular frame structure is inclined to the horizontal plane.

[0084] In some embodiments, the handle frame 110 and the front support frame 120 are fixed together. In some embodiments, the handle frame 110 may pivot relative to the front support frame 120. In some embodiments, the handle frame 110 is extendable and retractable relative to the front support frame 120.

[0085] In some embodiments, the front support frame 120 is divided into a front legsupport frame 1201 located in a lower portion and a handle support frame 1202 located in a upper portion. The handle frame 110 is connected to an upper end of the handle support frame 1202. A bottom end of the front support frame 120 is connected to the wheel assembly 140. More specifically, a front wheel of the wheel assembly 140 is mounted on the front leg-support frame 1201.

[0086] In some embodiments, the front leg-support frame 1201 and the handle support frame 1202 maybe, for example, an integrated structure. In some embodiments, the front leg-support frame 1201 and handle support frame 1202 may be, for example, a discrete structure. In some embodiments, the front leg-support frame 1201 and the handle support frame 1202 are fixed to each other. In some embodiments, the front leg-support frame 1201 and the handle support frame 1202 cannot pivot relative to each other. In some embodiments, the front leg-support frame 1201 and the handle support frame 1202 are pivotally connected to allow the front support frame 120 to fold.

[0087] Specifically, the front support frame 120 includes two support rods 121 disposed relative to each other and a connecting rod 122 connected to bottoms of the two support rods 121. In some embodiments, two support rods 121 are provided opposite each other along the left-right direction. Each support rod 121 has a portion corresponding to the front leg-support frame 1201 and a portion corresponding to the handle support frame 1202.

[0088] The rear support frame 130 has roughly an H-shaped frame structure, and two ends of the rear support frame 130 are respectively connected to two support rods 121 of the front support frame 120 in a pivotable or non-pivotable manner. The bottom end of the rear support frame 130 is connected to the wheel assembly 140.

[0089] In some embodiments, referring to FIG.4, for each of the support rods 121, the front leg-support frame 1201 and the handle support frame 1202 are connected at a joint 123. The two top ends of the rear support frame 130 are respectively connected to the frontleg-support frame 1201 of the two support rods 121, and the two bottom ends of the rear support frame 130 are respectively connected to rear wheels of the wheel assembly 140. The top ends of the two shock-absorbing mechanisms 800 are respectively pivotally connected to the armrest support frames 1202 of the two support rods 121, and the bottom ends of the two shock- absorbing mechanisms 800 are respectively pivotally connected to the two rear support frames 130.

[0090] As shown in FIG. 4 and FIG. 5, a first guide rail 151 and a second guide rail 152 are respectively disposed on inner sides of the two support rods 121 of the front support frame 120, that is, sides of the two support rods 121 opposite to each other. The first guide rail 151 extends approximately along a length direction of a corresponding support rod 121. The first guide rail 151 is, for example, connected to the handle support frame 1202. The first guide rail 151 is configured to provide a track in which the first connecting base 200 is moved relative to the frame 100 in a first direction Di or in a reverse direction of the first direction Di. An extension direction of the second guide rail 152 is arranged at an angle to a length direction of a corresponding support rod 121. The second guide rail 152 is, for example, connected to the front leg-support frame 1201. Referring to FIG. 6, the second guide rail 152 is configured to provide a track in which the second connecting base 300 is moved relative to the frame 100 in a second direction D2 or in a reverse direction of the second direction D2.

[0091] The structure of the frame 100 has a generally left-right symmetiy. Taking the frame 100 and the first connecting base 200 on one side of the stroller as an example, the following describes their structure and connection relationship in detail.

[0092] As shown in FIG. 5 and FIG. 6, the first connecting base 200 is slidable along the first guide rail 151. The first connecting base 200 includes an operating portion 210, a connecting portion 220, and a first mounting portion 230 that are arranged in sequence. In this embodiment, a housing of the first connecting base 200 may be an integrated structure. In another embodiment, the first connecting base 200 may be formed by connecting the operating portion 210, the connecting portion 220, and the first mounting portion 230 in a riveting or welding manner. In this embodiment, the first connecting base 200 is mounted on an inner side of the first guide rail 151, and a surface of the first connecting base 200 facing the first guide rail 151 is provided with a bar-shaped guide rail groove 240 that sequentially penetrates the operating portion 210, the connecting portion 220, and the first mounting portion 230 (referring to FIG. 7). The shape of the guide rail groove 240 is adapted to that of the first guide rail 151, so that the first connecting base200 is capable of being engaged with and slide along the first guide rail 151 through the guide rail groove 240.

[0093] Referring to FIG. 6, the first connecting base 200 may include an approximately U-shaped engaging clip 250. The engaging clip 250 may be connected to a side of the operating portion 210 and slidably clamps to an upper edge of the support rod 121. In this way, the mounting stability of the first connecting base 200 on the support rod 121 can be further improved. In some embodiments, the engaging clip 250 may be replaced with a sleeve, which is mounted on the outside of the first guide rail 151 and the support rod 121, thereby effectively improving connection reliability of the first connecting base 200 and the support rod 121.

[0094] Still referring to FIG. 5 and FIG. 6, a surface of the operating portion 210 facing away from the first guide rail 151 projects on a surface of the connecting portion 220 facing away from the first guide rail 151. The approximate middle portion of the connecting portion 220 is provided with a positioning hole 221. A side of the first mounting portion 230 facing away from the first guide rail 151 is provided with a first engaging convex portion 231 and a first engaging hole 232, and the first engaging hole 232 is located approximately above the first engaging convex portion 231.

[0095] In this embodiment, as shown in FIG. 5 and FIG. 6, the first locking mechanism 600 is provided on a surface of the operating portion 210 facing the ground, that is, the first locking mechanism 600 is approximately located on a lower side of the operating portion 210. Specifically, the first locking mechanism 600 includes a first locking member 610, a first unlocking operating member 620, and a first elastic member 630.

[0096] The surface of the operating portion 210 facing the ground may be provided with a second mounting groove 211, and a groove bottom of the second mounting groove 211 is provided with a communicating hole 212 facing the first guide rail 151. A side of the first guide rail 151 facing the ground is provided with a plurality of first locking holes 1511, which are arranged spaced apart from each other along a length direction of the first guide rail 151.

[0097] The first locking member 610 is movably disposed in the second mounting groove 211 of the first connecting base 200. The first locking member 610 is switchable between the first locking position and the first unlocking position. When the first locking mechanism 600 is in the locked state, the first locking member 610 is in the first locking position, and the first locking member 610 is adapted to be engaged with one of theplurality of first locking holes 1511 after passing through the communicating hole 212, so as the first connecting base 200 is fixed in any of the working positions. When the first locking mechanism 600 is in the unlocking state, the first locking member 610 is in the first unlocking position, and the first locking member 610 is adapted to be disengaged from the plurality of first locking holes 1511.

[0098] The first unlocking operating member 620 is operatively provided at a notch of the second mounting groove 211. The first unlocking operating member 620 is adapted to be pressed to drive the first locking member 610 to switch from the first locking position to the first unlocking position. Two ends of the first elastic member 630 respectively abut the first locking member 610 and a groove wall of the second mounting groove 211. The first elastic member 630 applies a force to the first locking member 610, to move toward the first locking position.

[0099] More specifically, as shown in FIG. 5, the first locking member 610 is pivotally connected to the first pivot point Ml in the second mounting groove 211. The first locking member 610 has a positioning convex 611 and a locking hook 612 that are respectively located on two sides of the first pivot point Ml.

[0100] The two ends of the first elastic member 630 respectively abut a surface of the first locking member 610 having the positioning convex 6nand the groove bottom of the second mounting groove 211. In some embodiments, a positioning groove 2111 is provided on the groove bottom of the second mounting groove 211, an end of the first elastic member 630 is disposed in the positioning groove 2111, and the other end is sleeved on the positioning convex 611. In this way, the first elastic member 630 is prevented from being shifted during a deformation process. In some embodiments, the first elastic member 630 may be a torsion spring sleeved on the first pivot point Mi and connected to the first locking member 610.

[0101] When the first locking member 610 is in the first locking position, the locking hook 612 is capable of protruding from the second mounting groove 211 through the communicating hole 212 to be engaged with one of the plurality of first locking holes 1511 on the first guide rail 151, so that the first connecting base 200 is fixed at one of the working positions relative to the frame 100. When the first locking member 610 is in the first unlocking position, the locking hook 612 is capable of being disengaged from one of the plurality of first locking holes 1511 that is engaged with the locking hook 612, and being retracted into the second mounting groove 211, so that the first connecting base 200 is capable of sliding relative to the first guide rail 151 to obtain an adjustable height positionof the first connecting base 200 relative to the frame too.

[0102] The first unlocking operating member 620 abut a surface of the positioning convex 611 facing away from the first elastic member 630. The locking hook 612 is driven to exit from the corresponding first locking hole 1511 by pressing the first unlocking operating member 620. In some embodiments, the first unlocking operating member 620 may be omitted, and an end of the first locking member 610 away from the locking hook 612 may be directly pressed, so that the first locking member 610 may be switched to the first locking position.

[0103] In some embodiments, as shown in FIG. 5, the plurality of first locking holes 1511 may include at least one low-area locking hole 1511a and at least one high-area locking hole 1511b. The low-area locking hole 1511a is located below the high-area locking hole 1511b. For example, when the first locking member 610 is engaged with one of the at least one low-area locking hole 1511a, the first connecting base 200 is adapted to be in the single-person height position. When the first locking member 610 is engaged with one of the at least one high-area locking hole 1511b, the first connecting base 200 is adapted to be in the double-person height position.

[0104] In this embodiment, the plurality of first locking holes 1511 include three low- area locking holes 1511a and one high-area locking hole 1511b, and the high-area locking hole 1511b is located above the three low-area locking holes 1511a. That is, in this embodiment, the first connecting base 200 has three single-person height positions and one double-person height position. In other embodiments, the number and arrangement locations of the low-area locking holes 1511a and high-area locking holes 1511b may be adjusted as required.

[0105] In this embodiment, a spacing between two low-area locking holes 1511a adjacent to each other is different from a spacing between the high-area locking hole 1511b and the low-area locking hole 1511a adjacent to each other. More specifically, the spacing between two low-area locking holes 1511a adjacent to each other is less than the spacing between the high-area locking hole 1511b and the low-area locking hole 1511a adjacent to each other. In another embodiment, in case that the plurality of first locking holes 1151 include a plurality of low-area locking holes 1511a and a plurality of high-area locking holes 1511b, the foregoing relationship may also applies to the spacing between two low- area locking holes 1511a adjacent to each other and the spacing between the high-area locking hole 1511b and the low-area locking hole 1511a adjacent to each other. That is, for the plurality of first locking holes 1151, the spacing between two low-area locking holes1511a adjacent to each other is different from the spacing between the high-area locking hole 1511b and the low-area locking hole 1511a adjacent to each other.

[0106] In some embodiments, as shown in FIGS. 6 and 7, the limiting mechanism 700 is disposed on the first guide rail 151, for example, between the high-area locking hole 1511b and the uppermost low-area locking hole 1511a. The limiting mechanism 700 includes, for example, a limiting member 710 and a reset elastic member 720. The limiting member 710 is movably disposed on the first guide rail 151 of the frame 100 and is switchable between a first position and a second position. Two ends of the reset elastic member 720 abut the limiting member 710 and the support rod 121 respectively. The reset elastic member 720 is configured to apply a force to the limiting member 710 to move toward the first position.

[0107] In this embodiment, when the limiting member 710 is in the first position, the limiting member 710 is adapted to be inserted in the positioning hole 221 to lock the first connecting base 200 in the double-person height position. When the limiting member 710 is in the second position, the limiting member 710 is adapted to exit from the positioning hole 221 to unlock the first connecting base 200 from the double-person height position. The limiting member 710 may be pressed to switch from the first position to the second position.

[0108] In some embodiments, when the first connecting base 200 has a plurality of double-person height positions, the first guide rail 151 may be provided with a plurality of limiting mechanisms 700. The plurality of limiting mechanisms 700 correspond to the plurality of double-person height positions. That is, when the first connecting base 200 is in different double-person height positions, the limiting member 710 of the corresponding limiting mechanism 700 extends into the positioning hole 221, thereby assisting the first locking mechanism 600 in locking the position of the first connecting base 200.

[0109] In some embodiments, for ease of arrangement, the first locking hole 1511 and the limiting member 710 are disposed on different sides of the first guide rail 151. For example, the first locking hole 1511 and the limiting member 710 are disposed on two adjacent sides of the first guide rail 151, and for example, the two adjacent sides are generally perpendicular to each other. In some embodiments, the first locking hole 1511 may be in communication with the side where the stopper 710 is located.

[0110] More specifically, as shown in FIG. 6 and FIG. 7, the first guide rail 151 is provided with a first mounting groove 1512 and a through hole 1513 in communication with the first mounting groove 1512. The groove bottom of the first mounting groove 1512is hollowed out, and the two ends of the reset elastic member 720 respectively abut the limiting member 710 and the corresponding support rod 121. Alternatively, in other embodiments, two ends of the reset elastic member 720 respectively abut the groove bottom of the limiting member 710 and the first mounting groove 1512. In the case where the limiting member 710 is in the first position, the limiting member 710 is adapted to protrude from a surface of the first guide rail 151 through the through hole 1513. Therefore, when the first connecting base 200 is in the double-person height position, the limiting member 710 can be engaged with the positioning hole 221 of the first connecting base 200 to lock the first connecting base 200 in the double-person height position. When the limiting member 710 is pressed, the limiting member 710 is retracted into the first mounting groove 1512 through the through hole 1513, that is, the limiting member 710 is switched from the first position to the second position. The limiting member 710 unlocks the first connecting base 200 from the double-person height position, so that the operating portion 210 of the first connecting base 200 is capable of sliding through the limiting member 710 in a first direction Di, allowing the first connecting base 200 to slide downwards to the working positions (for example, to any single-person height position).

[0111] When the stroller needs to be switched from the single-person riding mode to the double-person riding mode, that is, when the first connecting base 200 is moved from the single-person height position to the double-person height position, as shown in FIG. 5 to FIG. 7, firstly, the user needs to press the first unlocking operating member 620 to unlocked the first locking mechanism 600, so that the locking hook 612 of the first locking member 610 exits from the first locking hole 1511 that is engaged with the locking hook 612, so as to allow the first connecting base 200 to slide along the first guide rail 151. In this case, the user pushes the operating portion 210 to slide along the first direction Di, that is, the operating portion 210 slides upward relative to first guide rail 151. When the operating portion 210 abuts the limiting member 710, the user presses the limiting member 710, so that the limiting member 710 is moved from the first position to the second position (that is, the limiting member 710 is retracted into the first mounting groove 1512, and the reset elastic member 720 is compressed). The user continues to push the operating portion 210 along the first direction Di, so that the first connecting base 200 continuously abuts the limiting member 710 to retain the limiting member 710 in the second position, when the first connecting base 200 slides. When the first connecting base 200 slides to a position where the positioning hole 221 is opposite to the limiting member 710, the first connecting base 200 no longer abuts the limiting member 710, thelimiting member 710 is returned to the first position under the action of the elastic force from the reset elastic member 720, and thus is engaged with the positioning hole 221, as shown in FIG. 8 and FIG. 9.

[0112] When the stroller is in the double-person riding mode, while the first locking mechanism 600 locks the position of the first connecting base 200, the locking of the first connecting base 200 by the limiting mechanism 700 is equivalent to providing a dualsecurity lock protection to the first connecting base 200, so that the engagement of the first carrying body 400 and the first connecting base 200 with the frame too is more steadily, thereby avoiding the first carrying body 400 and the first connecting base 200 from accidentally falling down, and injuring the child on the second carrying body 500. In addition, the arrangement of the limiting mechanism 700 can further serve as a security reminder function for the user, that is, the user cannot move the first connecting base 200 to the double-person height position without actively unlocking the limiting mechanism 700. Therefore, when the stroller is in the single-person riding mode, a possibility of the user accidentally moving the first carrying body 400 to the double-person height position is eliminated, thereby avoiding the danger of the stroller tipping backwards.

[0113] In this embodiment, as shown in FIG. 1 to FIG. 3, both the first cariying body 400 and the second carrying body 500 are child seats. In other embodiments, both the first carrying body 400 and the second carrying body 500 may be baby baskets, or one of the first carrying body 400 and the second carrying body 500 is the baby basket, and another of the first carrying body 400 and the second carrying body 500 is the child seat.

[0114] As shown in FIG. 1 to FIG. 3, two sides of the first carrying body 400 are respectively mounted on the first connecting bases 200 located on the left and right sides of the stroller. Specifically, a connection structure between a side of the first carrying body 400 and a corresponding first connecting base 200 is used as an example for description. As shown in FIG. 3 and FIG. 4, a first engaging convex portion 231 is disposed on the first mounting portion 230 of the first connecting base 200, and a first engaging concave portion 410 that can cooperate with the first engaging convex portion 231 is disposed on the first carrying body 400. The removable connection between the first carrying body 400 and the first connecting base 200 is implemented through the engagement of the first engaging convex portion 231 and the first engaging concave portion 410. In another embodiment, alternatively, a first engaging concave portion 410 may be disposed on the first mounting portion 230 of the first connecting base 200, and a first engaging convex portion 231 capable of being engaged with the first engaging concave portion 410 isdisposed on the first carrying body 400.

[0115] As shown in FIG. 3 and FIG. 6, a first engaging member (not shown) may be further disposed on the first carrying body 400, a first engaging hole 232 may be correspondingly disposed on the first mounting portion 230 of the first connecting base 200, and the first engaging member is selectively engaged with the first engaging hole 232, so that a connection between the first carrying body 400 and the first connecting base 200 is strengthened. In other embodiments, alternatively, a first engaging hole 232 may be disposed on the first carrying body 400, and a first engaging member capable of being selectively engaged with the first engaging hole 232 may be disposed on the first mounting portion 230 of the first connecting base 200.

[0116] As shown in FIG. 8 and FIG. 10, two second connecting bases 300 are respectively disposed on the two support rods 121 of the frame too, and the arrangement location of each second connecting base 300 is located below a corresponding first connecting base 200. The second connecting base 300 is, for example, connected to the front leg-support frame 1201. A left side and a right side of the second carrying body 500 are removably connected to the two second connecting bases 300. Specifically, a connection structure between one of the second connecting bases 300 and a corresponding support rod 121 is used as an example for description. The second connecting base 300 is slidably disposed in a second guide rail 152 of the support rod 121 (referring to FIG. 10), and the second connecting base 300 is slidable along the second guide rail 152 between a used position and a storage position. The used position is disposed in front of the storage position. When the stroller is switched from the doubleperson riding mode to the single-person riding mode, the second carrying body 500 can be detached from the second connecting base 300, and the second connecting base 300 is pushed along the second guide rail 152 from the used position to the storage position, so as to avoid interference caused by the second connecting base 300 to legs of the child and make the appearance of the stroller neater and more beautiful.

[0117] In some embodiments, as shown in FIGS. 8 and 10, the second connecting base 300 includes a connecting base body 310, a second unlocking operating member 320, and a second elastic member 330. The second unlocking operating member 320 and the second elastic member 330 maybe collectively referred to as a second locking mechanism. The connecting base body 310 is adapted to be removably connected with the second carrying body 500. The second unlocking operating member 320 is movably disposed on the connecting base body 310, and switchable between the second locking position andthe second releasing position. The second elastic member 330 is configured to apply a force to the second unlocking operating member 320 to move toward the second locking position. For example, two ends of the second elastic member 330 abut the second unlocking operating member 320 and the connecting base body 310 respectively. A plurality of (at least two) second locking holes 1521 maybe disposed on the second guide rail 152.

[0118] When the second unlocking operating member 320 is in the second locking position, the second unlocking operating member 320 is adapted to be engaged with one of the plurality of second locking holes 1521, so that the second connecting base 300 is fixed in the used position or the storage position. In other embodiments, when three or more second locking holes 1521 are provided, the second connecting base 300 may further be fixed at a position between the used position and the storage position. When the second unlocking operating member 320 is in the second unlocking position, the second unlocking operating member 320 is adapted to disengage from the plurality of second locking holes 1521 so that the second connecting base 300 is movable relative to the second guide rail 152. The second unlocking operating member 320 can be operated to be moved from the second locking position to the second unlocking position.

[0119] Specifically, as shown in FIG. 8 and FIG. 10, the connecting base body 310 includes the second mounting portion 311 and the adjusting portion 312, and the adjusting portion 312 is disposed on a side of the second mounting portion 311. In this embodiment, a housing of the second connecting base 300 may be an integrated structure. In other embodiments, the second connecting base 300 may also be formed by connecting the second mounting portion 311 and the adjusting portion 312 in a manner such as welding or riveting.

[0120] The structure of second mounting portion 311 is approximately the same as that of first mounting portion 230. The second mounting portion 311 has a second engaging convex portion 3111 and a second engaging hole 3112 disposed above the second engaging convex portion 3111. The adjusting portion 312 is generally a strip-like structure inclined relative to a side of the second mounting portion 311, the adjusting portion 312 is slidably connected to the second guide rail 152, and an extension direction of the adjusting portion 312 is approximately the same as that of the second guide rail 152.

[0121] An accommodating groove 3121 is disposed approximately on a middle portion of the adjusting portion 312, and an extension direction of the accommodating groove 3121 is approximately perpendicular to an extension direction of the adjusting portion 312. Theconnecting base body 310 further has a retaining member (not shown) disposed in the accommodating groove 3121. In this embodiment, the retaining member is, for example, a rivet or a screw.

[0122] The second unlocking operating member 320 is removably disposed in the accommodating groove 3121. The second unlocking operating member 320 includes an operating body 321 and an engaging hook 322 disposed at an end of the operating body 321. In this embodiment, two second locking holes 1521 are disposed on a side of the second guide rail 152 facing the ground, and are respectively corresponding to a storage position and a used position of the second connecting base 300. In other embodiments, more than two second locking holes 1521 may be provided. When the second unlocking operating member 320 is in the second locking position, the engaging hook 322 is capable of being engaged with one of the second locking hole 1521. When the second unlocking operating member 320 is in the second unlocking position, the engaging hook 322 is capable of being disengaged from the corresponding second locking hole 1521. The operating body 321 is provided with a mounting hole 3211 that is arranged along a length direction of the operating body 321, the retaining member is inserted into the mounting hole 3211, and the second elastic member 330 is disposed in the mounting hole 3211, and two ends of the second elastic member 330 respectively abut the retaining member and the hole wall of the mounting hole 3211. At least a part of the second unlocking operating member 320 is capable of protruding from the accommodating groove 3121 to be operated. In this embodiment, specifically, an end of the operating body 321 that is away from the engaging hook 322 is capable of protruding from accommodating groove 3121 to be operated. In this embodiment, the operating body 321 is capable of being pressed and moved in an extension direction of the accommodating groove 3121.

[0123] A structure of a side of the stroller is used as an example for description. When the stroller is switched from the double-person riding mode to the single-person riding mode, firstly, the second cariying body 500 is removed from the second connecting base 300. As shown in FIG. 4 and FIG. 8, and then, an end of the second unlocking operating member 320 away from the engaging hook 322 is pressed, so that the second unlocking operating member 320 is switched from the second locking position to the second unlocking position, and the second elastic member 330 is compressed and deformed. In this case, the second connecting base 300 slides from the used position to the storage position relative to the second guide rail 152 in a second direction D2. When the second connecting base 300 is moved to a position where and the engaging hook 322 is oppositeto the second locking hole 1521 corresponding to the storage position, the second unlocking operating member 320 is released, and the second unlocking operating member 320 that loses the external force pressing action is restored to the second locking position under the action of the second elastic member 330, so that the engaging hook 322 is engaged with the second locking hole 1521 corresponding to the storage position, and the second connecting base 300 is locked in the storage position.

[0124] As shown in FIG. 2 and FIG. 3, two sides of the second carrying body 500 are respectively mounted on the second connecting bases 300 on a left side and a right side of the stroller. Specifically, a connection structure between a side of the second carrying body 500 and a corresponding second connecting base 300 is used as an example for description. As shown in FIG. 3, a second engaging convex portion 3111 is disposed on the second mounting portion 311 of the second connecting base 300, and a second engaging concave portion 510 that can cooperate with the second engaging convex portion 3111 is disposed on the second carrying body 500. The removable connection between the second carrying body 500 and the second connecting base 300 is implemented by engaging the second engaging convex portion 3111 and second engaging concave portion 510. In other embodiments, alternatively, a second engaging concave portion 510 may be disposed on the second mounting portion 311 of the second connecting base 300, and a second engaging convex portion 3111 that can cooperate with the second engaging concave portion 510 is disposed on the second carrying body 500.

[0125] As shown in FIG. 3 and FIG. 10, a second engaging member (not shown) may further be disposed on the second carrying body 500, a second engaging hole 3112 may be correspondingly disposed on a second mounting portion 311 of the second connecting base 300, and the second engaging member may selectively be engaged with the second engaging hole 3112, so that the connection between the second carrying body 500 and the second connecting base 300 can be strengthened. In other embodiments, alternatively, a second engaging hole 3112 may be disposed on the second cariying body 500, and a second engaging member capable of being selectively engaged with the second engaging hole 3112 may be disposed on the second mounting portion 311 of the second connecting base 300.

[0126] In some embodiments, as shown in FIG. 11 and FIG. 12, the shock-absorbing mechanism 800 in the stroller may be omitted. The first guide rail 151, the first connecting base 200, the second connecting base 300, the first locking mechanism 600, and the limiting mechanism 700 according to the present disclosure may be applied in differentframe 100. In addition, in some embodiments where the shock-absorbing mechanism 800 is not provided, the front leg-support frame 1201 and the handle support frame 1202 are connected at the joint 123, and two top ends of the rear support frame 130 are respectively connected to the armrest supports 1202 of the two support rods 121.

[0127] The stroller according to the aforementioned embodiments has at least the following technical effects.

[0128] In the stroller according to the aforementioned embodiments, the first carrying body 400 is movably mounted on the frame too by the first connecting base 200. When the stroller is in the double-person riding mode, the first connecting base 200 is in the double-person height position, and the double-person height position may be, for example, a relatively high height position, so that the second cariying body 500 can be mounted below the first carrying body 400. When the stroller is in the single-person riding mode, the first connecting base 200 is in the single-person height position, and the singleperson height position may be, for example, a lower height position, so that a gravity center of the stroller is decreased. In the stroller, the locking and unlocking of the height position of the first connecting base 200 is implemented by providing the first locking mechanism 600. In addition, in the stroller, the switching of the first carrying body 400 between the double-person height position and the single-person height position is selectively limited by the limiting mechanism 700, so as to provide a security reminder function for the user. That is, in a case where the user does not actively switch the position of the limiting mechanism 700, the user cannot move the first connecting base 200 from a single-person height position to a double-person height position. Therefore, when the stroller is in the single-person riding mode, a possibility of the user accidentally moving the first carrying body 400 to the double-person height position is eliminated, thereby avoiding the danger of the stroller tipping backwards.

[0129] Second embodiment

[0130] Referring to FIG. 13 to FIG. 15, a second embodiment of the present disclosure also provides a stroller that can implement a double-person riding mode (referring to FIG. 14) and a single-person riding mode (referring to FIG. 15). A structure of the stroller is similar to that of the stroller in the first embodiment, and includes a frame too, a first connecting base 200, a second connecting base 300, a first carrying body 400, and a second carrying body 500.

[0131] Similarly to the stroller according to the first embodiment, the frame too includes a handle frame 110, a front support frame 120, a rear support frame 130, and awheel assembly 140. According to needs, the frame too may or may not be provided with the shock-absorbing mechanism 800. The first connecting base 200 is movably disposed on the frame too and a height position of the first connecting base 200 relative to the frame too is adjustable. For example, the first carrying body 400 is removably mounted on the first connecting base 200. The first connecting base 200 has at least two working positions with different heights relative to the frame too. These working positions include a double-person height position and a single-person height position. Referring to FIG. 14, when the stroller is in the double-person riding mode, the first connecting base 200 is in a relatively high double-person height position, so as to support the first carrying body 400 in a relatively high position. In this case, the second carrying body 500 is supported below the first carrying body 400 by the second connecting base 300. Referring to FIG. 15, when the stroller is in the single-person riding mode, the second carrying body 500 is separated from the second connecting base 300, and the first connecting base 200 is in a lower single-person height position, so as to support the first carrying body 400 in a lower position.

[0132] If there is no conflict, a structure and a connection relationship for the frame too, the first connecting base 200, and the first carrying body 400 in the second embodiment may refer to descriptions in the first embodiment. Details are not described herein again. For example, when the first connecting base 200 is in the single-person height position, the position of the first connecting base 200 may be locked by the first locking mechanism 600 (not shown in this embodiment). The limiting mechanism 700 (not shown in this embodiment) is located on a movement path of the first connecting base 200 from the single-person height position to the double-person height position. The first connecting base 200 is locked in the double-person height position by the first locking mechanism 600 and the limiting mechanism 700.

[0133] In this second embodiment, an implementation manner of the second connecting base 300 is modified. Referring to FIG. 13, and FIG. 15 to FIG. 17, specifically, the second connecting base 300 includes a pivot base 340, a connecting base body 350, and a third locking mechanism 360 (referring to FIG. 17).

[0134] The pivot base 340 is mounted on the support rod 121 of the frame too. The connecting base body 350 is pivotally connected to the pivot base 340 to be able to rotate to the used position or the storage position. When the connecting base body 350 is in the used position, the connecting base body 350 protrudes upward relative to the front support frame 120 to facilitate a removable connection with the second cariying body 500.When the connecting base body 350 is in the storage position, the connecting base body 350 protrudes downward relative to the front support frame 120 to avoid interfering with the leg movement of the child.

[0135] Referring to FIG. 18 and FIG. 19, the connecting base body 350 pivots in a leftright direction relative to the pivot base 340, and the first pivot shaft 355 extends approximately in a back-forth direction. In this embodiment, as shown in FIG. 19 and FIG. 20, the first support surface 3421 is inclined, for example, the first support surface 3421 is inclined downward in a direction from front to back. A pivot angle of the connecting base body 350 between the used position and the storage position is not less than 90 degrees, and preferably greater than 90 degrees. More specifically, in this embodiment, A pivot angle of the connecting base body 350 between the used position and the storage position is greater than 90 degrees and less than 180 degrees.

[0136] The third locking mechanism 360 is configured to lock the connecting base body 350 in the used position.

[0137] When the stroller needs to be switched to the double-person riding mode, the first carrying body 400 is supported at a proper height (that is, the double-person height position) by the first connecting base 200, the third locking mechanism 360 locks the connecting base body 350 in the used position, and the second carrying body 500 is mounted on the connecting base body 350. When the stroller needs to be switched to the single-person riding mode, the second carrying body 500 is removed from the connecting base body 350, the locking of the connecting base body 350 is released by the third locking mechanism 360, and the connecting base body 350 is rotated downward to the storage position.

[0138] FIG. 16 and FIG. 17 illustrate exemplary connection manners of the pivot base 340 and the front support frame 120 (more specifically, the front leg-support frame 1201 of the support rod 121). The pivot base 340 has a mounting portion 341 and a first pivot portion 342, and the pivot base 340 may be but is not limited to an integrated structure. The mounting portion 341 has a groove 3410 and the support rod 121 is engaged in the groove 3410. A wall body of the groove 3410 is provided with a hole 3411, and the support rod 121 is provided with a hole 1203. A fastener 343 is inserted into the hole 3411 and the hole 1203, and the pivot base 340 is fixed to the support rod 121. In this case, the rotation and the movement of the pivot base 340 relative to the support rod 121 are limited. Certainly, a manner of fixing the pivot base 340 to the support rod 121 is not limited to the aforementioned example.

[0139] The first pivot portion 342 is located above the mounting portion 341 and is configured to be connected to the connecting base body 350. FIG. 16 and FIG. 17 illustrate exemplary connection manners for the pivot base 340 and the connecting base body 350. The first pivot portion 342 has a first pivot hole 3401, and a first pivot shaft 355 is provided in first pivot hole 3401. An end of the connecting base body 350 has a second pivot portion 351. The second pivot portion 351 is connected to the first pivot portion 342 via the first pivot shaft 355. More specifically, the second pivot portion 351 may include at least two connecting ears 3511, and each of the connecting ears 3511 has a second pivot hole 3510. The first pivot portion 342 extends in a space between two adjacent connecting ears 3511, the first pivot hole 3401 is opposite to the second pivot hole 3510, and the first pivot shaft 355 is inserted into the first pivot hole 3401 and the second pivot hole 3510. Another end of the connecting base body 350 has a first engaging portion 352, and the second carrying body 500 includes a second engaging portion 520 (see FIG. 14). The first engaging portion 352 and the second engaging portion 520 are removably engaged, so that the second carrying body 500 is mounted on the second connecting base 300. In some embodiments, the structures of the first pivot portion 342 and the second pivot portion 351 may be interchangeable.

[0140] FIG. 17 to FIG. 19 illustrate exemplary implementations of the third locking mechanism 360. The third locking mechanism 360 is mounted on the middle portion 353 of the connecting base body 350. A third locking hole 3420 is provided on a peripheral wall of the first pivot portion 342. The third locking mechanism 360 includes a third locking member 361 and a third elastic member 362, and the third locking member 361 has a third locking position and a third unlocking position. When the third locking member 361 is in the third locking position, the third locking member 361 is adapted to be inserted into the third locking hole 3420, and the third locking mechanism 360 is in a locked state to lock the connecting base body 350 in the used position. When the third locking member 361 is in the third unlocking position, the third locking member 361 exits from the third locking hole 3420, and the third locking mechanism 360 is in an unlocked state to unlock the connecting base body 350, allowing the connecting base body 350 to rotate to the storage position. The third elastic member 362 applies a force to the third locking member 361 to move toward the third locking position to retain the third locking member 361 in the third locking position.

[0141] In some embodiments, the extension direction of the third locking hole 3420 is perpendicular to an axis of the first pivot shaft 355. That is, the third locking member361 is extendable and retractable in a direction perpendicular to the axis of the first pivot shaft 355 to be switched between the third locking position and the third unlocking position.

[0142] Referring to FIG. 17, in some embodiments, a middle portion 353 of the connecting base body 350 is provided with a first sliding groove 3530 slidably matched with the third locking member 361. In some embodiments, a first end of the third locking member 361 is provided with a locking portion 3611 capable of protruding from the connecting base body 350 and being inserted into the third locking hole 3420 through a port 3533 of the first sliding groove 3530. A step 3613 is formed at a root portion of the locking portion 3611. The step 3613 is capable of abutting a peripheral wall of the port 3533 to prevent the third locking member 361 from slipping out of the first sliding groove 3530. The third elastic member 362 can be mounted in the first sliding groove 3530. Two ends of the third elastic member 362 abut a groove bottom (not labeled in figures) of the first sliding groove 3530and a second end of the third locking member 361. In some embodiments, the second end of the third locking member 361 is provided with a positioning hole 3612, and at least a portion of the second elastic member 362 may be accommodated in the positioning hole 3612.

[0143] FIG. 18 and FIG. 19 show sectional views of the second connecting base 300 located on a right side of the frame 100, the second connecting base 300 shown in FIG. 18 is in the used position, and the second connecting base 300 shown in FIG. 19 is in the storage position respectively. Referring to FIG. 18 and FIG. 19, a third locking member 361, especially the locking portion 3611, is biased relative to the first pivot shaft 355. When the connecting base body 350 is in the used position, the third locking member 361 is on a side of the first pivot shaft 355. When the connecting base body 350 is in the storage position, the third locking member 361 is rotated to another side of the first pivot shaft 355-

[0144] Still referring to FIG. 17, the third locking mechanism 360 may further include a third unlocking member 363. The third unlocking member 363 is operatively connected to the third locking member 361, so as to drive the third locking member 361 to be moved from the third locking position to the third unlocking position. The third unlocking member 363 extends, for example, from the third locking member 361 to the outside of the first sliding groove 3530. The third unlocking member 363 and the third locking member 361 may be in an integrated structure. In some embodiments, an extension direction of the third unlocking member 363 is substantially parallel to the first pivot shaft355, and an opening 3531 is provided on a wall body of the first sliding groove 3530 for the third unlocking member 363 to pass through. In some embodiments, each of two opposite sides of the third locking member 361 is provided with the third locking member 361, and each of two opposite wall bodies of the first sliding groove 3530 is provided with the opening 3531.

[0145] Still referring to FIG. 17, an end cover 370 may be provided on the first sliding groove 3530, and the end cover 370 can prevent an abnormal movement of the third locking member 361 caused by foreign objects easily entering the first sliding groove 3530. In some embodiments, for example, an end cover 370 includes a mounting hole 371 and a mounting hole 372 that are spaced apart from each other. The fastener 3711 (Referring FIG. 16) is inserted into the mounting hole 371, so as to mount the end cover 370 on the connecting base body 350. The fastener 3721 (Referring FIG. 16) is inserted into the mounting hole 372, so as to mount the end cover 370 on the connecting base body 350.

[0146] Referring to FIG. 16 and FIG. 17, for example, an elongated hole 3610 is provided on the first locking member 361, and a fastener 3711 is, for example, inserted into the elongated hole 3610. Referring to FIG. 17 and FIG. 18, in some embodiments, the connecting base body 350 is provided with a column body 3532. The column body 3532 is slidably matched with the elongated hole 3610, and the fastener 3711 is engaged with the column body 3532. In some embodiments, for example, when the fastener for fixing the end cover 370 is not inserted into the first locking member 361, the elongated hole 3610 and the column body 3532 slidably matched with the elongated hole 3610 may be omitted.

[0147] Referring to FIG. 17 and FIG. 18, the pivot base 340 may have a first support surface 3421. The connecting base body 350 may have a second support surface 3534. The third locking hole 3420 is disposed on the first support surface 3421, and a port 3533 of the first sliding groove 3530 is provided on the second support surface 3534. When the connecting base body 350 is in the used position, the first support surface 3421 and the second support surface 3534 are opposite in an up-down direction and abut with each other, so that a large support- contact surface between the pivot base 340 and the connecting base body 350 can be obtained, and the stress on the pivot base 340 is not too concentrated. In addition, the abutment of the first support surface 3421 and the second support surface 3534 may further limit the pivoting angle of the connecting base body 350 when pivoting to the used position. In some embodiments, both the first support surface 3421 and the second support surface 3534 may be planar.

[0148] Referring to FIG. 15 and FIG. 18, in some embodiments, at least one supportconvex 34211 is disposed on at least one of the first support surface 3421 and the second support surface 3534, and the support convex 34211 protrudes from a local region of the first support surface 3421 or the second support surface 3534. When the connecting base body 350 is in the used position, the support convex 34211 is sandwiched between the first support surface 3421 and the second support surface 3534, ensuring a reliable abutment between the first support surface 3421 and the second support surface 3534. In some embodiments, the support convex 34211 is formed, for example, integrally with a corresponding first support surface 3421 or second support surface 3534. In some embodiments, the support convex 34211 is, for example, strip-shaped.

[0149] Referring to FIG. 17 and FIG. 19, in some embodiments, the pivot base 340 includes an arc-shaped surface 3422, which is connected to the first support surface 3421 and provided with a limiting convex 34221. When the connecting base body 350 pivots from the used position to the storage position, the locking portion 3611 of the third locking member 361 abuts the limiting convex 34221 after crossing the limiting convex 34221, thereby maintaining the connecting base body 350 in the storage position. Certainly, an implementation manner in which the connecting base body 350 is maintained in the storage position is not limited to the aforementioned example.

[0150] In some embodiments, the pivot base 340 may further include a limiting surface 3423 for limiting an angle at which the connecting base body 350 pivots toward the storage position. The limiting surface 3423 is, for example, located below the arcshaped surface 3422, and the limiting surface 3423 is configured to abut the connecting base body 350.

[0151] Referring to FIG. 16 and FIG. 20, exemplary connection manners of the first engaging portion 352 and the second engaging portion 520 are shown. The second engaging portion 520 has an engaging cavity 5201, and the engaging cavity 5201 is adapted to be engaged with the first engaging portion 352. The second carrying body 500 is also provided with a fourth locking mechanism 530 configured to lock the first engaging portion 352 and the second engaging portion 520.

[0152] In some embodiments, the first engaging portion 352 has a receiving cavity 3520 providing with a locking column 3521. The fourth locking mechanism 530 includes a hook member 531 disposed in the engaging cavity 5201. The hook member 531 is connected to the second engaging portion 520 via the second pivot 5311 to be able to rotate between a fourth locking position and a fourth unlocking position. When the first engaging portion 352 and the second engaging portion 520 are engaged, the hook member531 is inserted into the receiving cavity 3520 and is switched from the fourth unlocking position to the fourth locking position. The hook member 531 in the fourth locking position is hooked to the locking column 3521, thereby locking the first engaging portion 352 and the second engaging portion 520. When the first engaging portion 352 and the second engaging portion 520 need to be unlocked, the hook member 531 is switched to the fourth unlocking position and separated from the locking column 3521, so that the second engaging portion 520 can be removed from the first engaging portion 352.

[0153] In some embodiments, the fourth locking mechanism 530 may further include a fourth unlocking member 532 and a fourth elastic member 533. The fourth elastic member 533 is configured to apply a force to the hook member 531, so as to rotate the hook member 531 toward the fourth locking position. The fourth unlocking member 532 is configured to drive the hook member 531 to rotate from the fourth locking position to the fourth unlocking position.

[0154] Referring to FIG. 20, the fourth unlocking member 532 may be pivotally connected to a structural member 550 of the second carrying body 500 via a third pivot shaft 5321. The structural member 550 is, for example but not limited to, formed integrally with the second engaging portion 520. The hook member 531 has an extension portion 5312 movably connected to a fourth unlocking member 532. More specifically, one of the extension portion 5312 and the fourth unlocking member 532 is provided with a sliding column 5313, and another of the extension portion 5312 and the fourth unlocking member532 is provided with an elongated hole 5322. The sliding column 5313 is slidably matched with the elongated hole 5322. The fourth elastic member 533 is, for example, an elastic arm extending from the fourth unlocking member 532, and abuts the structural member 550. The fourth elastic member 533 applies a force to the hook member 531 via the fourth unlocking member 532, causing the hook member 531 to have a tendency to rotate toward the fourth locking position. In some embodiments, the fourth elastic member 533 is, for example, a torsion spring sleeved on the second pivot 5311 and connected to the hook member 531.

[0155] Referring to FIG. 15 and FIG. 16, when the two connecting base bodies 350 are in the used position, a distance between the first engaging portions 352 of the two connecting base bodies 350 is relatively small. When the two connecting base bodies 350 are in the storage position, a distance between the first engaging portions 352 of the two connecting base bodies 350 is relatively great.

[0156] Referring to FIG. 21 to FIG. 26, an exemplary structure of the first carryingbody 400 is shown. The first carrying body 400 includes a seat assembly 41, an armrest support rod 42, a backrest support rod 43, a fifth locking mechanism 44, a linkage mechanism 45, an armrest body 46, and a backrest body 47.

[0157] Referring to FIG. 21 to FIG. 23, the seat assembly 41 includes a seat body 411 and two side baffles 423. Each of the side baffles 423 includes, for example, a side baffle plate 412 and a side cover 413. The seat body 411 is configured to carry children. The two side baffle plates 412 are respectively located on two opposite sides of the seat body 411, that is, the two side baffle plates 412 are connected to a left side and a right side of the seat body 411. In this embodiment, the seat body 411 and the two side baffle plates 412 may be an integrated structure. Certainly, in other embodiments, the seat body 411 and the two side baffle plates 412 may also be mutually independent components. Inner sides of the two side baffle plates 412 are opposite to each other, and the two side covers 413 are placed on outer sides of the two side baffle plates 412 respectively. A mounting space 401 is formed between each of the side baffle plates 412 and the corresponding side cover 413. Each of the left side and the right side of the seat body 411 is provided with an armrest support rod 42, a backrest support rod 43, a fifth locking mechanism 44 and a linkage mechanism 45 are further disposed on. Two ends of the armrest body 46 are connected to the armrest support rods 42 located on both sides of the seat body 411. In some embodiments, two ends of the armrest body 46 are respectively removably connected to the corresponding armrest support rods 42. Two ends of the backrest body 47 are respectively connected to the backrest support rods 43 located on both sides of the seat body 411. In some embodiments, the backrest body 47 is formed integrally with backrest support rod 43, for example.

[0158] The following uses the side baffle 423, the armrest support rod 42, the backrest support rod 43, the fifth locking mechanism 44, and the linkage mechanism 45 on a side of the seat assembly 41 as an example to describe a structure of the first carrying body 400 in detail.

[0159] As shown in FIG. 21, the armrest support rod 42 and the side baffle plate 412 are pivotally connected to the second pivot point M2, and the backrest support rod 43 and the side baffle 423 are pivotally connected to the third pivot point N via the driving member 431. In this embodiment, both the armrest support rod 42 and the backrest support rod 43 are located on the inner side of the side baffle plate 412. As shown in FIG. 21 and FIG. 25, both the armrest support rod 42 and the backrest support rod 43 have an unfolded position and a folded position. When the first carrying body 400 is in a usagestate, the first carrying body 400 is available for a child to ride on, and both the armrest support rod 42 and the backrest support rod 43 are in an unfolded position. When the first carrying body 400 is in a folded state, both the armrest support rod 42 and the backrest support rod 43 are in the folded position, facilitating the storage and placing of the first cariying body 400.

[0160] Both the fifth locking mechanism 44 and the linkage mechanism 45 are disposed in the side baffle 423, and may be located between the armrest support rod 42 and the backrest support rod 43. The fifth locking mechanism 44 is configured to lock the armrest support rod 42 in the unfolded position. When the backrest support rod 43 is folded in a direction close to the armrest support rod 42, the linkage mechanism 45 can be driven to move. The linkage mechanism 45 drives the fifth locking mechanism 44 to be unlocked, so as to allow the armrest support rod 42 to rotate to the collapsed position.

[0161] Specifically, as shown in FIG. 23 to FIG. 26, the fifth locking mechanism 44 is disposed in the mounting space 401. The fifth locking mechanism 44 includes a fifth locking member 441, a locking fastener 442, a first reset member 443 and a second reset member 446.

[0162] The locking fastener 442 is connected to the armrest support rod 42 in a non- rotatable manner. Therefore, when the armrest support rod 42 is rotated around the second pivot point M2, the locking fastener 442 is rotated together with the armrest support rod 42 around the second pivot point M2. The locking fastener 442 is provided with a fifth locking hole 4420. Referring to FIG. 24, when the armrest support rod 42 is in the unfolded position, the fifth locking hole 4420 is in a first rotational position, and the fifth locking hole 4420 and the fifth locking member 441 cooperate to lock the armrest support rod 42 in the unfolded position. Referring to FIG. 26, when the armrest support rod 42 is in the folded position, the fifth locking hole 4420 and the fifth locking member 441 are separated, and the fifth locking hole 4420 is rotated together with the armrest support rod 42 to a second rotational position.

[0163] Referring to FIG. 23 to FIG. 26, the locking fastener 442 may include a pivot plate 4421 and a fan-shaped portion 4422. An axis of the pivot plate 4421 overlaps with the second pivot point M2, and the pivot plate 4421 is connected to the armrest support rod 42 in a non-rotatable manner. The fan-shaped portion 4422 protrudes from a periphery of the pivot plate 4421. The fifth locking hole 4420 may be disposed on the fanshaped portion 4422, for example, may be disposed on an end close to the fan-shaped portion 4422.

[0164] The second reset member 446 is configured to apply a force to the locking fastener 442, so as to rotate the locking fastener 442 toward the first rotational position. In some embodiments, the second reset member 446 may be a spring. An end of the second reset member 446 is connected to the locking fastener 442, and a connection position between the second reset member 446 and the locking fastener 442 deviates from the second pivot point M2. For example, a connection position between the second reset member 446 and the locking fastener 442 is close to another end of the fan-shaped portion 4422. Another end of the second reset member 446 may be fixed to any fixed point Si. In some embodiments not shown, the second reset member 446 may be, for example, a torsion spring sleeved on the second pivot point M2, and the torsion spring is connected to the locking fastener 442.

[0165] As shown in FIG. 24 and FIG. 26, the fifth locking member 441 is removably disposed on the side baffle 423, and the fifth locking member 441 has a fifth locking position in which the fifth locking member 441 is inserted into the fifth locking hole 4420 and a fifth unlocking position in which the fifth locking member 441 exits from the fifth locking hole 4420. Specifically, the second sliding groove 402 may be disposed in the mounting space 401, and the fifth locking member 441 and the second sliding groove 402 are slidably matched to allow the fifth locking member 44H0 move between the fifth locking position and the fifth unlocking position. In some embodiments, one of a groove wall of the second sliding groove 402 and a fifth locking member 441 may be provided with an elongated hole 4410, and another thereof may be provided with a column 4021 slidably matched with the elongated hole 4410, so as to limit a moving travel of the fifth locking member 441.

[0166] The first reset member 443 is configured to apply a force to the fifth locking member 441 to move toward the fifth locking position. In some embodiments, the first reset member 443 may be a spring. An end of the first reset member 443 is connected to an end of the fifth locking member 441 far from the locking fastener 442, and another end of the first reset member 443 may, for example, abut a groove wall of the second sliding groove 402.

[0167] As shown in FIG. 23, FIG. 24, and FIG. 26, the linkage mechanism 45 is disposed within the mounting space 401 and is capable of abutting the backrest support rod 43. When the linkage mechanism 45 is driven by the backrest support rod 43, the fifth locking member 441 is driven to the fifth unlocking position.

[0168] In some embodiments, the linkage mechanism 45 includes a first transmissionmember 451, a second transmission member 452, and a traction member 453. The first transmission member 451 is mounted on the second transmission member 452. The second transmission member 452 is rotatably mounted around the third pivot point N in the mounting space 401. The second transmission member 452 is, for example, circular in shape, and is sleeved on the pivot portion 4010 in the mounting space 401. The first end 4531 of the traction member 453 is connected to the second transmission member 452, and the second end 4532 is connected to the fifth locking member 441. When the backrest support rod 43 is rotated toward the folded position, the backrest support rod 43 may abut the first transmission member 451, so that the first transmission member 451 drives the second transmission member 452 to rotate around the third pivot point N, and further drives the fifth locking member to move toward a fifth unlocked state via the traction member 453.

[0169] Referring to FIG. 21, FIG. 23, and FIG. 24, an exemplary structure that the backrest support rod 43 drives the linkage mechanism 45 is shown.

[0170] Specifically, a first arc-shaped hole 403 is provided in the mounting space 401, and the first transmission member 451 and first arc-shaped hole 403 are slidably matched. The first arc-shaped hole 403 limits a pivoting angle range of the first transmission member 451. When the fifth locking member 441 is in the fifth locking position, the first transmission member 451 is disposed on a first end 4031 of the first arc-shaped hole 403. When the fifth locking member 441 is in the fifth unlocking position, the first transmission member 451 is disposed on a second end 4032 of the first arc-shaped hole 403.

[0171] The backrest support rod 43 is pivotally connected to the third pivot point N via the driving member 431. The driving member 431 is, for example, fan-shaped. The driving member 431 is provided with a second arc-shaped hole 4310, and an arc length of the second arc-shaped hole 4310 is greater than that of the first arc-shaped hole 403. The first transmission member 451 is slidably matched with the second arc-shaped hole 4310. When the backrest support rod 43 is rotated to the folded position, a first end 4311 of the second arc-shaped hole 4310 is moved to a position where the first end 4311 of the second arc-shaped hole 4310 abut the first transmission member 451, and the first transmission member 451 is driven to rotate from a first end 4031 of the first arc-shaped hole 403 to a second end 4032 of the first arc-shaped hole 403, so that the fifth locking member 441 is moved to the fifth unlocking position and exits from the fifth locking hole 4420. Subsequently, the backrest support rod 43 continues to rotate toward the folded position and presses the armrest support rod 46, causing the armrest support rod 46 to rotatetoward the folded position as well.

[0172] When the backrest support rod 43 is rotated toward the unfolded position, the backrest support rod 43 no longer continues to press the armrest support rod 46, and the first end 4311 of the second arc-shaped hole 4310 no longer abuts the first transmission member 451. The second reset member 446 drives the locking fastener 442 to rotate in the first rotational position, so that the armrest support rod 42 is reset to the unfolded position. When the locking fastener 442 is rotated to the first rotational position and the fifth locking member 441 is aligned with the fifth locking hole 4420, the first reset member 443 drives the fifth locking member 441 to move to the fifth locking position, and the fifth locking member 441 is inserted into the fifth locking hole 4420, that is, the armrest support rod 42 is locked in the unfolded position.

[0173] It may be learned from FIG. 21 and FIG. 23 that an arc length of the second arc-shaped hole 4310 is greater than that of first arc-shaped hole 403. The second arcshaped hole 4310 with a longer arc length allows the inclined angle of the backrest support rod 43 to be adjusted. In some embodiments, a backrest adjusting mechanism 430 may be provided between the backrest support rod 43 and the side baffle 423, and the backrest adjusting mechanism 430 is configured to lock the inclined angle of the backrest support rod 43. When the second end 4312 of the second arc-shaped hole 4310 abuts the first transmission member 451, the backrest support rod 43 is adjusted backward to the maximum inclined angle.

[0174] Referring to FIG. 23, an aperture of the first arc-shaped hole 403 is greater than that of the second arc-shaped hole 4310. In some embodiments, the first transmission member 451 includes a mounting column 4511 and a connecting column 4512. The mounting column 4511 may be formed integrally with the second transmission member 452, and the mounting column 4511 is slidably matched with the first arc-shaped hole 403. The connecting column 4512 is mounted in a center hole of the mounting column 4511 and extends into the second arc-shaped hole 4310 to slidably matched with the second arc-shaped hole 4310.

[0175] It should be noted that, although a folding structure of the first cariying body 400 including the seat assembly 41, the armrest support rod 42, and the backrest support rod 42 is exemplified in this embodiment, it may be understood that the folding structure may also be applied to any other carrying body, for example, the second carrying body 500.

[0176] The technical features of the aforementioned embodiments may be combinedarbitrarily. To simplify the description, not all the possible combinations of the technical features in the aforementioned embodiments are described. However, all of the combinations of these technical features should be considered as within the scope of the present disclosure, as long as such combinations do not contradict with each other.

[0177] The aforementioned embodiments only represent several examples of the present disclosure, and the description thereof is more specific and detailed, but it should not be construed as restricting the scope of the present disclosure. It should be noted that, for those skilled in the art, several variations and improvements may be made without departing from the concept of the present disclosure, and these are all within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be defined by the appended claims.

Claims

CLAIMS1. A stroller, having a double-person riding mode and a single-person riding mode, the stroller comprising: a frame; a first connecting base configured to support a first carrying body, wherein the first connecting base is movably disposed on the frame, and a height position of the first connecting base relative to the frame is adjustable, wherein, when the stroller is in the double-person riding mode, the first connecting base is in a double-person height position, and when the stroller is in the single-person riding mode, the first connecting base is in a single-person height position; a first locking mechanism switchable between a locked state and an unlocked state, wherein, when the first locking mechanism is in the locked state, the height position of the first connecting base is locked relative to the frame, and when the first locking mechanism is in the unlocked state, the first connecting base is unlocked relative to the frame; and a limiting mechanism switchable between a first state and a second state, wherein, when the limiting mechanism is in the first state, the movement of the first connecting base from the single-person height position to the double-person height position is limited, and when the limiting mechanism is in the second state, the first connecting base is allowed to be switched between the single-person height position and the double-person height position.

2. The stroller according to claim 1, wherein, when the limiting mechanism is in the first state, the limiting mechanism collaborates with the first locking mechanism to lock the first connecting base in the double-person height position.

3. The stroller according to claim 1 or 2, wherein the first connecting base has a positioninghole, wherein, when the first connecting base is in the double-person height position, the limiting mechanism is adapted to be inserted in the positioning hole and switched to the first state to lock the first connecting base in the double-person height position, and when the limiting mechanism exits from the positioning hole and is switched to the second state, the limiting mechanism unlocks the first connecting base from the double-person height position.

4. The stroller according to any one of the preceding claims, wherein the limiting mechanism comprises: a limiting member movably disposed on the frame and switchable between a first position and a second position, wherein, when the limiting member is in the first position, the limiting mechanism is in the first state, and when the limiting member is in the second position, the limiting mechanism is in the second state; and a reset elastic member applying a force to the limiting member to move toward the first position.

5. The stroller according to claim 4, wherein the frame comprises a first guide rail, wherein the first connecting base is slidable along the first guide rail, wherein a first mounting groove and a through hole in communication with the first mounting groove are disposed in the first guide rail, and a groove bottom of the first mounting groove is hollowed out; wherein, when the limiting member is in the first position, the limiting member is adapted to protrude from a surface of the first guide rail through the through hole, and when the limiting member is in the second position, the limiting member is adapted to be retracted into the first mounting groove through the through hole; and two ends of the reset elastic member respectively abut the limiting member and the frame.

6. The stroller according to claim 5, wherein the first connecting base is provided with alocking member, and the frame is provided with a plurality of first locking holes spaced apart from each other along a length direction of the first guide rail; wherein the plurality of first locking holes at least include more than one high-area locking holes, and when the locking member is engaged with the high-area locking hole, the first connecting base is in the double-person height position.

7. The stroller according to claim 6, wherein the high-area locking holes are located above the through hole; or wherein the plurality of first locking holes further include a plurality of low- area locking holes, wherein, when the locking member is engaged with one of the plurality of low-area locking holes, the first connecting base is in the single-person height position, and a spacing between each two adjacent low-area locking holes in the connecting base of low- area locking holes is different from a spacing between the high-area locking hole and the low- area locking hole adjacent to each other.

8. The stroller according to any one of the claims 5 to 7, wherein the first connecting base comprises an operating portion, and when the first locking mechanism is in the locked state, the operating portion is operatable to cause the first connecting base to slide along the first guide rail.

9. The stroller according to claim 8, wherein the first connecting base has a positioning hole, and when the first connecting base is in the double-person height position, the positioning hole cooperates with the limiting member of the limiting mechanism to lock the first connecting base.

10. The stroller according to claim 9, wherein the operating portion is located above the positioning hole, and / or the first locking mechanism is mounted on the operating portion.

11. The stroller according to any one of the preceding claims, further comprising a second connecting base configured to support the second carrying body, wherein the second connecting base is disposed on the frame and located below the first connecting base, wherein the second connecting base comprises a pivot base, a connecting base body, and a third locking mechanism; the pivot base is mounted on the frame, and the connecting base body is pivotally connected to the pivot base to be able to be rotated to a used position or a storage position; wherein, when the connecting base body is in the used position, the connecting base body is adapted to be connected to the second carrying body; and the third locking mechanism has a locked state where the connecting base body is locked to the used position, and an unlocked state where the connecting base body is unlocked.

12. The stroller according to claim 11, wherein a peripheral wall of the pivot base is provided with a third locking hole; wherein the third locking mechanism is disposed on the connecting base body, the third locking mechanism comprises a third locking member, and the third locking member has a third locking position where the third locking member is adapted to be inserted into the third locking hole and a third unlocking position where the third locking member is adapted to exit from the third locking hole.

13. The stroller according to claim 12, wherein the peripheral wall of the pivot base comprises a first support surface, and the connecting base body comprises a second support surface, wherein, when the connecting base body is in the used position, the first support surface supports the second support surface, and the third locking hole is disposed on the first support surface.14- The stroller according to claim 13, wherein at least one of the first support surface and the second support surface is provided with at least one support convex.

15. The stroller according to any one of the claims 12 to 14, wherein the pivot base comprises an arc-shaped surface provided with a limiting convex, wherein, when the connecting base body pivots from the used position to the storage position, the third locking member abuts the limiting convex after crossing the limiting convex to retain the connecting base body in the storage position.

16. The stroller according to any one of the claims 11 to 15, wherein the connecting base body pivots in a left-right direction relative to the pivot base to rotate to the used position or the storage position; and / or, an angle at which the connecting base body pivots between the used position and the storage position is greater than 90 degrees.

17. The stroller according to any one of the claims 12 to 16, wherein the pivot base and the connecting base body are pivotally connected via a first pivot shaft, wherein, when the connecting base body is switched between the used position and the storage position, the third locking member is switched between a left side and a right side of the first pivot shaft.

18. A stroller, comprising: a seat assembly comprising a seat body and a side baffle located on a side of the seat body; an armrest support rod, wherein the armrest support rod and the side baffle are pivotally connected to a second pivot point, so that the armrest support rod is capable of being moved between a folded position and an unfolded position; a backrest support rod, wherein the backrest support rod and the side baffle are pivotally connected to a third pivot point, so that the backrest support rod is capable of being moved between a folded position and an unfolded position;a fifth locking mechanism configured to lock the armrest support rod in an unfolded state; and a linkage mechanism disposed between the backrest support rod and the fifth locking mechanism, wherein when being driven by the backrest support rod, the linkage mechanism drives the fifth locking mechanism to unlock the armrest support rod.

19. The stroller according to claim 18, wherein the fifth locking mechanism comprises a fifth locking member and a locking fastener; wherein the locking fastener is connected to the armrest support rod, and wherein a fifth locking hole is disposed on a peripheral wall of the locking fastener; wherein the fifth locking member is operatively connected to the linkage mechanism, and the fifth locking member has a fifth locking position where the fifth locking member is inserted into the fifth locking hole and a fifth unlocking position where the fifth locking member exits from the fifth locking hole.

20. The stroller according to claim 19, wherein the fifth locking member is mounted in a second sliding groove; wherein the locking fastener has a first rotational position and a second rotational position; wherein, when the armrest support rod is in the unfolded position, the locking fastener is in the first rotational position, and the fifth locking hole faces the fifth locking member; and wherein, when the armrest support rod is in the folded position, the locking fastener is in the second rotational position, and the fifth locking hole is staggered from the fifth locking member.

21. The stroller according to claim 19 or 20, wherein the fifth locking mechanism comprises a first reset member and a second reset member, wherein the first reset member applies a force to the fifth locking member to move toward the fifth locking position, and the second reset member applies a force to the locking fastener to move toward the first rotational position.

22. The stroller according to any one of the claims 19 to 21, wherein the linkage mechanism comprises a first transmission member, a second transmission member, and a traction member; wherein the first transmission member is mounted on the second transmission member, the second transmission member is capable of rotating around the third pivot point, and two ends of the traction member are respectively connected to the second transmission member and the fifth locking member; wherein, when the backrest support rod is moved to the folded position, the backrest support rod presses the first transmission member, so as to drive the second transmission member to rotate, and drives the fifth locking member to a fifth unlocking position via the traction member.

23. The stroller according to claim 22, wherein the side baffle is provided with a first arcshaped hole limiting a range of pivoting of the first transmission member.

24. The stroller according to claim 23, wherein the backrest support rod is pivotally connected to the third pivot point via the driving member, a second arc-shaped hole is provided in the driving member, a length of the second arc-shaped hole is greater than that of the first arc-shaped hole, and the second arc-shaped hole is in slidably matched with the first transmission member, and is capable of driving the first transmission member to rotate.

25. The stroller according to claim 24, wherein an aperture of the first arc-shaped hole is greater than an aperture of the second arc-shaped hole; the first transmission member comprises a mounting column and a connecting column, the mounting column is slidably matched with the first arc-shaped hole, and the connecting column is mounted in a center hole of the mounting column and is slidably matched with the second arc-shaped hole.

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