A connecting mechanism and a folding trolley

Abstract

This utility model discloses a connecting mechanism and a folding trolley. The connecting mechanism includes a first support rod, a second support rod, a connecting base, and a locking member. The adjacent ends of the first and second support rods are rotatably connected to the connecting base. The locking member is telescopically connected to the connecting base along the width direction of the first support rod. In the locked position, the locking member can engage with the adjacent ends of the first and second support rods in the unfolded state to keep the first and second support rods in the unfolded state. In the unlocked position, the locking member can disengage from the adjacent ends of the first and second support rods in the unfolded state to allow the first and second support rods to rotate towards the folded state. This connecting mechanism can lock in the unfolded state, so that the folding trolley equipped with this connecting mechanism can be locked in the unfolded state, greatly improving the stability of the folding trolley in the unfolded state.

Description

Technical Field

[0001] This utility model relates to the field of folding trolleys, and more particularly to a connecting mechanism and a folding trolley. Background Technology

[0002] Folding trolleys are mainly used for carrying outdoor equipment such as folding chairs and tents during outdoor activities, making it easy for people to move items. Some folding trolleys on the market, such as the flat-folding trolley with announcement number CN222728021U, have a base frame with two support frames that are hinged together by support rods on both sides of the two support frames. The support rods are connected to the side frames by a crossbar assembly. When the trolley is unfolded, it is supported between the support rods and the side frames by the crossbar assembly to maintain the unfolded state. However, because the crossbar assembly is movable, the base frame is easily folded due to accidental contact, causing the entire trolley to fold and deform. This is especially true when the trolley is empty, as it is prone to folding and deforming, making it inconvenient to move or carry items smoothly. Summary of the Invention

[0003] This utility model addresses the shortcomings of existing technologies by providing a connecting mechanism and a folding trolley. The connecting mechanism can be locked in the unfolded state, so that the folding trolley equipped with the connecting mechanism can be locked in the unfolded state, which greatly improves the stability of the folding trolley in the unfolded state.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A connecting mechanism includes a first support rod and a second support rod arranged along the same length direction, a connecting base, and a locking member. The adjacent ends of the first and second support rods are rotatably connected to the connecting base and are capable of rotating between an unfolded state and a folded state. In the unfolded state, the opposing ends of the first and second support rods are far apart, and in the folded state, the opposing ends of the first and second support rods are close together. The locking member is telescopically connected to the connecting base along the width direction of the first support rod and is capable of telescopic movement between a locked position and an unlocked position. In the locked position, the locking member can engage with the adjacent ends of the first and second support rods in the unfolded state to keep the first and second support rods in the unfolded state. In the unlocked position, the locking member can disengage from the adjacent ends of the first and second support rods in the unfolded state to allow the first and second support rods to rotate toward the folded state.

[0006] Preferably, the locking member is arranged on the upper side of the adjacent ends of the first support rod and the second support rod. When the locking member is in the locked position, it can abut against the upper side of the adjacent ends of the first support rod and the second support rod respectively to keep the first support rod and the second support rod in the unfolded state.

[0007] Preferably, the locking member includes an operating rod arranged along the width direction of the first support rod, and a first locking part and a second locking part respectively connected to the inner ends of the operating rod. When the first support rod and the second support rod are in the unfolded state, the operating rod can extend and retract towards its inner end to drive the locking member from the locked position to the unlocked position. When the locking member is in the locked position, the first locking part and the second locking part respectively abut against the upper side of the adjacent ends of the first support rod and the second support rod. When the locking member is in the unlocked position, the first locking part and the second locking part are respectively misaligned and arranged inside the adjacent ends of the first support rod and the second support rod. The first support rod and the second support rod can rotate in a folded state on both sides of the operating rod.

[0008] Preferably, the connecting base includes a first substrate and a second substrate arranged opposite to each other, and a connecting substrate connected between the first substrate and the second substrate. The adjacent ends of the first support rod and the second support rod are respectively arranged between the first substrate and the second substrate, and are respectively rotatably connected to the first substrate and the second substrate through hinge shafts. The first substrate is provided with a first channel that is retractably connected to the operating rod, and the second substrate is provided with a second channel for the first locking part and the second locking part to extend out of the second substrate.

[0009] Preferably, the locking member further includes a limiting portion on the second substrate away from the first substrate, the limiting portion protruding from the first locking portion and / or the second locking portion and / or the operating lever.

[0010] Preferably, it further includes an operating element, wherein the operating lever extends out of the first substrate through the first channel, and the operating element is arranged outside the first substrate and connected to the outer end of the operating lever.

[0011] Preferably, it further includes a reset base, which is connected to the side of the second substrate away from the first substrate. The reset base is provided with a telescopic groove that communicates with the second channel. The inner end of the locking member is telescopically connected in the telescopic groove, and a reset member is provided between the inner end of the locking member and the telescopic groove. The reset member is used to apply force to reset the locking member to the locked position.

[0012] Preferably, it further includes a third support rod arranged side by side on the upper side of the first support rod and a fourth support rod arranged side by side on the upper side of the second support rod. The adjacent ends of the third support rod and the fourth support rod are rotatably connected to the connecting base, and the connection positions of the third support rod and the fourth support rod rotatably connected to the connecting base are staggered on both sides of the connection positions of the first support rod and the second support rod rotatably connected to the connecting base. The adjacent ends of the third support rod and the fourth support rod are arranged at intervals to form an installation area for arranging the locking element.

[0013] Preferably, it also includes a locking fastener and a fastening fastener. The locking fastener is connected to the first support rod or the third support rod, and the fastening fastener is connected to the second support rod or the fourth support rod. When the first support rod and the second support rod are in the folded state, they can be connected to each other by the locking fastener and the fastening fastener to keep the first support rod and the second support rod in the folded state.

[0014] This utility model also provides a folding trolley, including a first side frame, a second side frame, and a base frame. The base frame includes two connecting mechanisms that are rotatably connected between the first side frame and the second side frame, and a support assembly connected between the two connecting mechanisms.

[0015] The beneficial effects achieved by this utility model are as follows:

[0016] The connecting mechanism provided by this utility model, when the first support rod and the second support rod are in the unfolded state, can keep the first support rod and the second support rod in the unfolded state by extending and retracting the locking member relative to the connecting base to the locking position, so that the adjacent ends of the first support rod and the second support rod are respectively engaged with the locking member, thus preventing the first support rod and the second support rod from rotating into the folded state due to accidental contact. By extending and retracting the locking member relative to the connecting base to the unlocked position, the adjacent ends of the first support rod and the second support rod are respectively separated from the locking member, thus allowing the first support rod and the second support rod to rotate into the folded state for folding. The operation is very simple and convenient.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the connecting mechanism according to an embodiment of the present invention. Figure 1 .

[0020] Figure 2 This is a schematic diagram of the connecting mechanism according to an embodiment of the present invention. Figure 2 .

[0021] Figure 3 This is a partial exploded view of the connecting mechanism in the unfolded state according to an embodiment of the present invention.

[0022] Figure 4 This is a partial exploded view of the connecting mechanism in the folded state according to an embodiment of the present invention.

[0023] Figure 5 This is an exploded structural diagram of the connecting mechanism according to an embodiment of the present invention.

[0024] Figure 6 This is a partial structural schematic diagram of the connecting mechanism according to an embodiment of the present invention.

[0025] Figure 7 This is a structural schematic diagram of the connecting mechanism in the unfolded state according to another embodiment of the present invention.

[0026] Figure 8 This is a schematic diagram of the connecting mechanism in a folded state according to another embodiment of the present invention.

[0027] Figure 9 This is a structural schematic diagram of a folding trolley in its unfolded state according to an embodiment of the present invention.

[0028] Figure 10 This is a structural diagram of a folding trolley in a folded state according to an embodiment of the present invention.

[0029] Reference numerals: First support rod 1, Second support rod 2, Third support rod 3, Fourth support rod 4, Connecting base 5, First base plate 51, First channel 511, Second base plate 52, Second channel 521, Connecting base plate 53, Locking member 6, First locking part 61, Second locking part 62, Operating rod 63, Limiting part 64, Positioning part 65, Operating member 7, Reset base 8, Telescopic groove 81, Positioning groove 82, Locking fastener 91, Fastening member 92, First side frame 10, Second side frame 20, Base frame 30, Support assembly 31. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0035] like Figures 1-6As shown in the figure, as an embodiment of the present invention, a connecting mechanism is provided, including a first support rod 1 and a second support rod 2 arranged along the same length direction, a connecting base 5, and a locking member 6. The adjacent ends of the first support rod 1 and the second support rod 2 are respectively rotatably connected to the connecting base 5 and can rotate between an unfolded state and a folded state. In the unfolded state, the opposite ends of the first support rod 1 and the second support rod 2 are far apart from each other. In the folded state, the opposite ends of the first support rod 1 and the second support rod 2 are close together. The adjacent ends of the first support rod 1 and the second support rod 2 refer to the end of the first support rod 1 that is closer to the second support rod 2 and the end of the second support rod 2 that is closer to the first support rod 1. The opposite ends of the first support rod 1 and the second support rod 2 refer to the end of the first support rod 1 that is far away from the second support rod 2 and the end of the second support rod 2 that is far away from the first support rod 1. The locking member 6 is telescopically connected to the connecting base 5 along the width direction of the first support rod 1, and can telescopically move between the locked position and the unlocked position. In the locked position, the locking member 6 can cooperate with the adjacent ends of the first support rod 1 and the second support rod 2 in the unfolded state to keep the first support rod 1 and the second support rod 2 in the unfolded state. In the unlocked position, the locking member 6 can separate from the adjacent ends of the first support rod 1 and the second support rod 2 in the unfolded state to allow the first support rod 1 and the second support rod 2 to rotate toward the folded state. In this embodiment, the connecting mechanism, when the first support rod 1 and the second support rod 2 are in the unfolded state, can keep the first support rod 1 and the second support rod 2 in the unfolded state by extending and retracting the locking member 6 relative to the connecting base 5 to the locking position, so that the adjacent ends of the first support rod 1 and the second support rod 2 are respectively engaged with the locking member 6, thus preventing the first support rod 1 and the second support rod 2 from rotating into the folded state due to accidental contact. By extending and retracting the locking member 6 relative to the connecting base 5 to the unlocking position, the adjacent ends of the first support rod 1 and the second support rod 2 are respectively separated from the locking member 6, thus allowing the first support rod 1 and the second support rod 2 to rotate into the folded state for folding. The operation is very simple and convenient.

[0036] like Figure 3 , Figure 4As shown, in some specific embodiments, the locking member 6 is arranged on the upper side of the adjacent ends of the first support rod 1 and the second support rod 2. When the locking member 6 is in the locked position, it can abut against the upper side of the adjacent ends of the first support rod 1 and the second support rod 2 respectively, so as to keep the first support rod 1 and the second support rod 2 in the unfolded state. In this embodiment, the locking member 6 is arranged on the upper side of the adjacent ends of the first support rod 1 and the second support rod 2. Without changing the structure of the first support rod 1 and the second support rod 2 themselves, it can prevent the first support rod 1 and the second support rod 2 from rotating or folding relative to each other upward or downward by abutting against the upper side of the adjacent ends of the first support rod 1 and the second support rod 2 respectively, thereby keeping the first support rod 1 and the second support rod 2 in the unfolded state, which is convenient for production and assembly, and ensures the structural stability of the first support rod and the second support rod 2. In other embodiments, the locking member may also be arranged on the lower side of the adjacent ends of the first support rod and the second support rod. When the locking member is in the locked position, it can prevent the first support rod and the second support rod from rotating or folding relative to each other by abutting against the lower side of the adjacent ends of the first support rod and the second support rod, thereby keeping the first support rod and the second support rod in the unfolded state. Alternatively, the locking member may also be arranged at the middle position of the adjacent ends of the first support rod and the second support rod. When the locking member is in the locked position, it can prevent the first support rod and the second support rod from rotating or folding relative to each other by fastening with the middle position of the adjacent ends of the first support rod and the second support rod, thereby keeping the first support rod and the second support rod in the unfolded state.

[0037] In some specific embodiments, the locking member 6 includes an operating lever 63, a first locking part 61, and a second locking part 62. The operating lever 63 is arranged along the width direction of the first support rod 1. The first locking part 61 is arranged on the upper side of the first support rod 1 near one end of the second support rod 2 and is connected to one side of the inner end of the operating lever 63. The second locking part 62 is arranged on the upper side of the second support rod 2 near one end of the first support rod 1 and is connected to the other side of the inner end of the operating lever 63. When the first support rod 1 and the second support rod 2 are in the extended state, the operating lever 63 can extend and retract towards its inner end to move the locking member 6 from the locked position to the unlocked position. When the locking member 6 is in the locked position, the first locking part 61 abuts against the upper side of the first support rod 1 near the end of the second support rod 2, and the second locking part 62 abuts against the upper side of the second support rod 2 near the end of the first support rod 1. The first locking part 61 and the second locking part 62 are configured as plate structures, which can respectively make surface contact with the upper side of the first support rod 1 near the end of the second support rod 2 and the upper side of the second support rod 2 near the end of the first support rod 1, thereby improving the stability of the contact. When the locking member 6 is in the unlocked position, the first locking part 61 is offset and arranged inside the first support rod 1 near the end of the second support rod 2, and the second locking part 62 is offset and arranged inside the second support rod 2 near the end of the first support rod 1. The first support rod 1 and the second support rod 2 can rotate in a folded state on both sides of the operating lever 63. In this embodiment, the operator can move the locking member 6 from the locked position to the unlocked position by pressing the outer end of the operating lever 63 to extend and retract towards the inner end of the operating lever 63. This conforms to operating habits and makes the overall spatial arrangement of the connecting mechanism compact and reasonable. In other embodiments, the first locking part 61 and the second locking part 62 can also be set along the outer end of the operating lever 63. By pulling the outer end of the operating lever 63, the locking member 6 can be extended and retracted towards the outer end of the operating lever 63 to move the locking member 6 from the locked position to the unlocked position.

[0038] In some specific embodiments, the connecting base 5 includes a first substrate 51 and a second substrate 52 arranged opposite to each other, and a connecting substrate 53 connecting the first substrate 51 and the second substrate 52. The adjacent ends of the first support rod 1 and the second support rod 2 are respectively arranged between the first substrate 51 and the second substrate 52, and are rotatably connected to the first substrate 51 and the second substrate 52 respectively through hinge shafts, so that the connection is stable and reliable. The first substrate 51 is provided with a first channel 511 that is retractably connected to the operating rod 63, and the second substrate 52 is provided with a second channel 521 for the first locking part 61 and the second locking part 62 to extend out of the second substrate 52. In this embodiment, the second channel is set to a shape adapted to the first locking part 61 and the second locking part 62. When the locking member 6 moves retractably relative to the connecting base 5, it can be guided by the operating rod 63 sliding along the first channel 511 and the first locking part 61 and the second locking part 62 sliding along the second channel 521, so as to ensure the retractable movement of the locking member 6. The process is smooth, and the first locking part 61 and the second locking part 62 are located between the first substrate 51 and the second substrate 52 when locked, and can extend out of the second substrate 62 when unlocked, so that the first support rod 1, the second support rod 2, the first substrate 51 and the second substrate 52 are arranged in a compact space. In other embodiments, the second channel 62 can also be set to be larger than the shape of the first locking part 61 and the second locking part 62, so that the first locking part 61 and the second locking part 62 can extend out of the second substrate 62 when unlocked.

[0039] like Figure 5 , Figure 6 As shown, in some specific embodiments, the locking member 6 further includes a limiting portion 64 on the side of the second base plate 62 away from the first base plate 61. Two limiting portions 64 are provided, protruding from the first locking portion 61 and the second locking portion 62 respectively, and can abut against the side of the second base plate 62 away from the first base plate 61. On the one hand, this prevents the locking member 6 from excessively extending outwards and disengaging from the connecting base 5; on the other hand, it accurately positions the first locking portion 61 and the second locking portion 62 at locking positions arranged on the upper sides of the adjacent ends of the first support rod 1 and the second support rod 2. In this embodiment, the limiting portion 64 protrudes from the first locking portion 61 and the second locking portion 62 respectively, providing good limiting stability. In other embodiments, the limiting portion 64 may only protrude from the first locking portion 61, or only from the second locking portion 62, or from the operating lever 63, or from any combination of the first locking portion 61, the second locking portion 62, and the operating lever 63.

[0040] In some specific embodiments, an operating element 7 is also included. The operating lever 63 extends out of the first base plate 51 through the first channel 511. The operating element 7 is arranged outside the first base plate 51 and connected to the outer end of the operating lever 63. The operator can press the operating element 7 to drive the locking element 6 to extend and retract towards the inner end of the operating lever 63 to the unlocked position. The operating element 7 improves the comfort of the operator's pressing operation.

[0041] like Figure 5 As shown, in some specific embodiments, a reset base 8 is also included. The reset base 8 is connected to the side of the second substrate 52 away from the first substrate 51. The reset base 8 has a telescopic groove 81 that communicates with the second channel 521. The inner end of the locking member 63 is telescopically connected to the telescopic groove 81, and can be guided by sliding along the telescopic groove 81 during the telescopic movement of the locking member 63, thereby further improving the stability of the locking member 6 during the telescopic movement. Furthermore, a reset member (not shown in the figure) is provided between the inner end of the locking member 6 and the telescopic groove 81. This reset member is used to apply force to reset the locking member 6 to the locked position, so that after the operator presses the locking member 6 to the unlocked position, the locking member 6 can be automatically reset to the locked position by applying force through the reset member, which is convenient for the next press. In this embodiment, the reset member is set as a compression spring, which is simple and practical in structure. The locking member 6 also includes a positioning part 65 arranged at its inner end and connected to the operating rod 63. The telescopic groove 81 has a positioning groove 82 corresponding to the positioning part 65. One end of the reset member abuts against the locking member 6 and is sleeved on the positioning part 65 for positioning, and the other end abuts against the positioning groove 82 and is sleeved in the positioning groove 82 for positioning, so as to prevent the reset member from shifting during the telescopic movement of the locking member 6. In some other embodiments, the positioning part 65 may also be connected to the first locking part 61 or the second locking part 62, or connected to any combination of the first locking part 61, the second locking part 62, and the operating rod 63; or the reset member may be omitted, and the locking member 6 can be reset from the unlocked position to the locked position by the operator manually pulling the operating part 7.

[0042] In some specific embodiments, the system further includes a third support rod 3 arranged side-by-side on the upper side of the first support rod 1 and a fourth support rod 4 arranged side-by-side on the upper side of the second support rod 2. The adjacent ends of the third support rod 3 and the fourth support rod 4 are rotatably connected to the connecting base 5 via hinge shafts. The two hinge shafts between the third support rod 3 and the fourth support rod 4 and the connecting base 5 are staggered on both sides of the two hinge shafts between the first support rod 1 and the second support rod 2 and the connecting base 5, forming an inverted trapezoidal structure. This means that the connection positions of the third support rod 3 and the fourth support rod 4 rotatably connected to the connecting base 5 are staggered on both sides of the connection positions between the first support rod 1 and the second support rod 2 and the connecting base 5, preventing mutual interference between the first support rod 1, the second support rod 2, the third support rod 3, and the fourth support rod 4 during folding or unfolding. Furthermore, the adjacent ends of the third support rod 3 and the fourth support rod 4 are spaced apart to form an installation area for the locking element 6, resulting in a compact and ingenious structural arrangement. Furthermore, the third support rod 3 and the fourth support rod 4 can abut against the lower side of the connecting base plate 53 when in the unfolded state, thereby limiting the rotation of the third support rod and the fourth support rod 4 on the lower side of the connecting base 5. The reset base 8 and the second base plate 52 are fixedly connected by hinge shafts connected to the first support rod 1, the second support rod 2, the third support rod 3, and the fourth support rod 4, respectively, which simplifies the structure and facilitates assembly. The hinge shafts can be set as rivets, bolts, or other structures. In some embodiments, the reset base 8 and the second base plate 52 can also be connected by a separate connector.

[0043] like Figure 7 , Figure 8 As shown in another embodiment of this utility model, the connecting mechanism further includes a locking element 91 and a fastening element 92. The locking element 91 is connected to the first support rod 1, and the fastening element 92 is connected to the fourth support rod 4. When the first support rod 1 and the second support rod 2 are in a folded state, they can be fastened together by the locking element 91 and the fastening element 92 to keep the first support rod 1 and the second support rod 4 in a folded state, facilitating stable storage after folding. In this embodiment, the locking element 91 is configured as a hook structure and is rotatably connected to the first support rod 1. The fastening element 92 is configured as a hanging rod structure. Rotating the locking element 91 forward relative to the first support rod 1 will hook and fasten the locking element 91 to the fastening element 92. Rotating the locking element 91 in the opposite direction relative to the first support rod 1 will separate the locking element 91 from the fastening element 92. The structure is simple and the operation is convenient. In other embodiments, the locking element 91 and the fastening element 92 may also be configured as other structures that can be fastened together. The locking element 91 may also be connected to the third support rod 3, and the fastening element 92 may also be connected to the second support rod 2.

[0044] like Figure 9 , Figure 10As shown, in another embodiment of this utility model, a folding trolley is also provided, including a first side frame 10, a second side frame 20, and a base frame 30. The base frame 30 includes two connecting mechanisms provided in the above embodiment, respectively rotatably connected between the bottoms of the first side frame 10 and the second side frame 20, and a support assembly 31 connected between the two connecting mechanisms. The support assembly 31 is used in combination with the connecting mechanisms to realize the supporting and load-bearing function of the base frame 30. Because this embodiment of the folding trolley uses the connecting mechanisms provided in the above embodiment, when the folding trolley is in the unfolded state, the locking member 6, in cooperation with the first support rod 1 and the second support rod 2, can lock the entire folding trolley in the unfolded state, greatly improving the stability of the folding trolley in the unfolded state.

[0045] In some specific embodiments, the ends of the first support rod 1 and the third support rod 3 that are away from the connecting base 5 are rotatably connected to the first side frame 10, and the ends of the second support rod 2 and the fourth support rod 4 that are away from the connecting base 5 are rotatably connected to the second side frame 20. There is no need to connect an additional cross rod group between the first side frame 10 and the second side frame 20. The first side frame 10 and the second side frame 20 can be supported in a vertical state by four support rods, which greatly simplifies the overall structure of the folding cart, reduces the overall weight of the folding cart, and makes it convenient to move or transport the folding cart.

[0046] In some specific embodiments, the folding trolley also includes a wheel assembly connected to the first side frame 10 and the second side frame 20, and a handle assembly for the operator to push and pull the folding trolley.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

[0048] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A connection mechanism, characterized in that The first support rod and the second support rod are arranged along the same length direction, and a connecting base and a locking member are connected, wherein: The adjacent ends of the first support rod and the second support rod are respectively rotatably connected with the connecting base, and can rotate between an unfolded state and a folded state, in the unfolded state, the opposite ends of the first support rod and the second support rod are away from each other, in the folded state, the opposite ends of the first support rod and the second support rod are close to each other; The locking member is telescopically connected with the connecting base along the width direction of the first support rod, and can telescopically move between a locking position and an unlocking position, in the locking position, the locking member can be matched with the adjacent ends of the first support rod and the second support rod in the unfolded state respectively, so as to keep the first support rod and the second support rod in the unfolded state, in the unlocking position, the locking member can be separated from the adjacent ends of the first support rod and the second support rod in the unfolded state respectively, so as to allow the first support rod and the second support rod to rotate towards the folded state.

2. The connection mechanism of claim 1, wherein: The locking member is arranged on the upper side of the adjacent ends of the first support rod and the second support rod, and when the locking member is in the locking position, it can be abutted and matched with the upper side of the adjacent ends of the first support rod and the second support rod respectively, so as to keep the first support rod and the second support rod in the unfolded state.

3. The connection mechanism of claim 2, wherein: The locking member includes an operating rod arranged along the width direction of the first support rod, and a first locking part and a second locking part connected on both sides of the inner end of the operating rod respectively, when the first support rod and the second support rod are in the unfolded state, the operating rod can be telescopically moved towards the inner end direction to drive the locking member to move from the locking position to the unlocking position, When the locking member is in the locking position, the first locking part and the second locking part are respectively abutted and matched with the upper side of the adjacent ends of the first support rod and the second support rod, when the locking member is in the unlocking position, the first locking part and the second locking part are respectively arranged on the inner side of the adjacent ends of the first support rod and the second support rod, and the first support rod and the second support rod can be respectively rotated towards the folded state on both sides of the operating rod.

4. The connection mechanism of claim 3, wherein: The connecting base includes a first base plate and a second base plate arranged oppositely, and a connecting base plate connected between the first base plate and the second base plate, the adjacent ends of the first support rod and the second support rod are respectively arranged between the first base plate and the second base plate, and are rotatably connected with the first base plate and the second base plate through a hinge shaft, the first base plate is provided with a first channel telescopically connected with the operating rod, and the second base plate is provided with a second channel for the first locking part and the second locking part to extend out of the second base plate.

5. The connection mechanism of claim 4, wherein: The locking member further includes a limiting part limited on the side of the second base plate away from the first base plate, and the limiting part is protruded on the first locking part and / or the second locking part and / or the operating rod.

6. The connection mechanism of claim 4, wherein: Further comprising an operating member, the operating rod extends out of the first base plate through the first channel, and the operating member is arranged outside the first base plate and connected with the outer end of the operating rod.

7. The connection mechanism of claim 4, wherein: The reset base is connected to the second base plate on the side away from the first base plate, and a telescopic slot is arranged in the reset base and communicates with the second channel. The inner end of the locking member is telescopically connected in the telescopic slot, and a reset member is arranged between the inner end of the locking member and the telescopic slot. The reset member is used to reset the locking member to the locking position.

8. The connection mechanism according to any one of claims 1-7, characterized in that: The third support rod and the fourth support rod are arranged on the upper sides of the first support rod and the second support rod, respectively. The adjacent ends of the third support rod and the fourth support rod are rotatably connected to the connecting base, respectively. The connecting positions of the third support rod and the fourth support rod rotatably connected to the connecting base are arranged on the two sides of the connecting positions of the first support rod and the second support rod rotatably connected to the connecting base, respectively. The adjacent ends of the third support rod and the fourth support rod are arranged in a spaced manner to form a mounting area for the locking member.

9. The connection mechanism of claim 8, wherein: The locking member is connected to the first support rod or the third support rod, and the buckling member is connected to the second support rod or the fourth support rod. When the first support rod and the second support rod are in the folded state, the locking member and the buckling member can be buckled and connected to each other to keep the first support rod and the second support rod in the folded state.

10. A folding stroller characterized by, The first side frame, the second side frame, the bottom frame, the connecting mechanism, and the support assembly are included. The first side frame, the second side frame, the bottom frame, the connecting mechanism, and the support assembly are included. ​ ​

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