Frame assembly and stroller

Abstract

The application discloses a kind of frame assembly and cart, it is related to the technical field of cart, wherein, frame assembly includes frame, wheel group, first locking mechanism, second locking mechanism and unlocking device, wheel group is rotatably arranged at the bottom of frame;First locking mechanism is arranged in frame, for directional locking to wheel group;Second locking mechanism is arranged in frame, for locking the joint of frame;Unlocking device is arranged in frame, first sliding unlocking piece is drivingly connected with first locking mechanism;Second sliding unlocking piece is drivingly connected with second locking mechanism;First operating member is movably mounted to housing, and has first transmission state of transmission cooperation with first sliding unlocking piece, second transmission state of transmission cooperation with second sliding unlocking piece;Second operating member is movably mounted to housing, and is configured to trigger first operating member to switch from first transmission state to second transmission state when stressed action;The technical scheme provided by the application can improve the convenience of operation.

Description

Technical Field

[0001] This invention relates to the field of trolley technology, and in particular to a frame assembly and a trolley. Background Technology

[0002] To facilitate storage and transportation, existing handcarts are typically designed with a folding function to reduce their space occupation. Additionally, to adapt to different pushing environments, the rear wheels of handcarts are usually equipped with a directional or omnidirectional switching mechanism to meet the needs of straight-line pushing or flexible steering.

[0003] However, the existing rear wheel reversing structure is complex and not conducive to achieving quick and convenient switching operations. In addition, the existing folding mechanism is also relatively complicated, requiring users to unlock multiple locking nodes one by one. There are usually many such locking nodes, requiring users to perform unlocking steps on different parts of the frame in sequence, which is cumbersome and time-consuming. Summary of the Invention

[0004] The main objective of this invention is to provide a frame assembly and a trolley designed to improve ease of operation.

[0005] To achieve the above objectives, the present invention provides a vehicle frame assembly comprising: A frame and a wheel assembly, wherein the wheel assembly is rotatably disposed at the bottom of the frame; A first locking mechanism, disposed on the frame, is used to directionally lock the wheel assembly; A second locking mechanism, disposed in the frame, is used to lock the joints of the frame; and An unlocking device is disposed on the frame, the unlocking device comprising: The outer casing is provided on the frame; The first sliding unlocking component is connected to the first locking mechanism via a transmission connection; The second sliding unlocking component is connected to the second locking mechanism via a transmission connection; The first operating component is movably mounted on the housing and has a first transmission state that is in transmission cooperation with the first sliding unlocking component and a second transmission state that is in transmission cooperation with the second sliding unlocking component. The second operating element is movably mounted on the housing and configured to trigger the first operating element to switch from the first transmission state to the second transmission state when subjected to force.

[0006] In one embodiment, the triggering direction of the first operating element is set at an angle to the triggering direction of the second operating element.

[0007] In one embodiment, the triggering direction of the first operating element is perpendicular to the triggering direction of the second operating element.

[0008] In one embodiment, the first sliding unlocking member is connected to the first locking mechanism via a first pulling member; the second sliding unlocking member is connected to the second locking mechanism via a second pulling member.

[0009] In one embodiment, the first pulling member includes a first pull rope portion and a first fixing portion. One end of the first pull rope portion is connected to the first fixing portion, and the other end is disposed in the frame and connected to the first locking mechanism. The first fixing portion is disposed in a first anti-detachment groove on the first sliding unlocking member. And / or, the second pulling member includes a second pull rope portion and a second fixing portion, one end of the second pull rope portion is connected to the second fixing portion, the other end is disposed in the frame and connected to the second locking mechanism, and the second fixing portion is disposed in the second anti-disengagement groove on the second sliding unlocking member.

[0010] In one embodiment, the frame assembly further includes a support member that is in transmission cooperation with the second operating member, wherein both the first sliding unlocking member and the second sliding unlocking member are slidably mounted on the support member.

[0011] In one embodiment, the first sliding unlocking member has a first trigger portion extending out of the support member, and the second sliding unlocking member has a second trigger portion extending out of the support member. In the first transmission state, the first trigger portion abuts against the first operating member, and in the second transmission state, the second trigger portion abuts against the first operating member.

[0012] In one embodiment, the first trigger portion and the second trigger portion are arranged side by side along the operating direction of the second operating member, and extend in opposite directions.

[0013] In one embodiment, the first operating member includes an operating body and an extension arm. One end of the extension arm is connected to the operating body, and the other end extends toward the first trigger portion. The extension arm is used to abut and cooperate with the first trigger portion or the second trigger portion.

[0014] In one embodiment, two extension arms are provided on the same side of the operating body, and the two extension arms are spaced apart along the operating direction of the second operating member.

[0015] In one embodiment, the distance between the driving surfaces on the two extension arms is greater than the maximum distance between the first trigger portion and the second trigger portion.

[0016] In one embodiment, two first triggering parts are provided along a first direction of the support member, the first direction being perpendicular to the operating direction of the second operating member and also perpendicular to the operating direction of the first operating member; The extension arm includes two extensions corresponding to the two first trigger portions, and the first driving surface and the second driving surface facing each other of the two extensions are gradually widened in the direction close to the first trigger portion.

[0017] In one embodiment, the two first sliding unlocking members are connected by a first elastic member; And / or, the first trigger portion is provided with a first limiting groove for accommodating the first elastic member.

[0018] In one embodiment, two second triggering parts are provided, and the two second sliding unlocking parts are connected by a second elastic member; And / or, the second trigger portion is provided with a second limiting groove for accommodating the second elastic member.

[0019] In one embodiment, the support member is provided with a first guide hole and a second guide hole extending along a first direction, the first trigger portion passing through the first guide hole and the second trigger portion passing through the second guide hole.

[0020] In one embodiment, the frame has handrail tubes; The outer shell has a connected fixed cavity and a movable cavity. The handrail tube passes through the fixed cavity. The first operating member and the second operating member are both movably installed in the movable cavity. The movable cavity is provided with a first through hole and a second through hole for respectively exposing the first operating member and the second operating member.

[0021] In one embodiment, the first operating member is elastically connected to the support member via a first reset member; And / or, the second operating element is elastically connected to the housing via a second reset element.

[0022] In one embodiment, the operating body of the first operating member is limited and engaged with the first through hole, and at least partially extends out of the first through hole; And / or, the support member has a positioning post extending out of the second through hole, the second operating member is sleeved on the positioning post and engages with the second through hole; And / or, the housing is provided with a guide structure, and the support member is guided and installed on the guide structure.

[0023] The present invention also proposes a trolley comprising the frame assembly described above.

[0024] In the technical solution of this invention, the unlocking control of a single operating component adapting to a dual-locking mechanism is achieved through a transmission switching design of the unlocking device. Specifically, the first operating component has a first transmission state that is in transmission cooperation with the first sliding unlocking component and a second transmission state that is in transmission cooperation with the second sliding unlocking component. Furthermore, the second operating component can switch the first operating component from the first transmission state to the second transmission state. Therefore, the first operating component can flexibly adjust its working mode according to the unlocking requirements. It can either choose to form an effective transmission cooperation with the first sliding unlocking component or switch to form a transmission cooperation with the second sliding unlocking component through a switching operation, thereby achieving independent control of any locking function in the dual-locking mechanism.

[0025] The state switching process is simple and efficient, requiring only the operation of the second operating component without the need to replace or adjust other parts. This design not only simplifies the overall mechanical structure of the system and reduces the structural complexity of the dual-locking mechanism's unlocking control, but also helps to simplify the unlocking operation process, adapting to the needs of one-handed operation. At the same time, it reduces the possibility of misoperation, thereby improving the ease of operation and user experience of the unlocking device in actual use. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a structure of an embodiment of the vehicle frame assembly provided by the present invention; Figure 2 for Figure 1 Rear view of the mid-frame assembly; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 for Figure 1 A schematic diagram of the explosion of the unlocking device; Figure 5 This is a schematic diagram of the assembly of the first operating component and the second sliding unlocking component; Figure 6 for Figure 5 A magnified view of a section at point B in the middle; Figure 7 This is an assembly diagram of the first operating component and the first sliding unlocking component; Figure 8 for Figure 7 A magnified view of a section at point C; Figure 9 for Figure 1 Front view of the mid-frame assembly; Figure 10 for Figure 9 A sectional view of the mid-frame assembly cut along section line AA; Figure 11 for Figure 9 A cross-sectional view of the mid-frame assembly cut along the BB section line.

[0028] Explanation of icon numbers: 11. Frame; 111. Handrail tube; 12. Wheel set; 2. Unlocking device; 20. First sliding unlocking component; 21. First unlocking body; 22. First trigger part; 23. First limiting groove; 30. Second sliding unlocking component; 31. Second unlocking body; 32. Second trigger part; 33. Second limiting groove; 40. First operating component; 41. Operating body; 42. Extending arm; 43. Extension section; 431. First driving surface; 432. Second driving surface; 50. Second operating component; 51. Limiting step; 60. Support component; 61. First guide hole; 62. Second guide hole; 63. Positioning pin; 71. First pulling member; 72. Second pulling member; 73. Pull rope part; 731. First pull rope part; 732. Second pull rope part; 74. Fixing part; 741. First fixing part; 742. Second fixing part; 75. Anti-detachment groove; 751. First anti-detachment groove; 752. Second anti-detachment groove; 80. Outer shell; 81. Fixed cavity; 82. Movable cavity; 83. First through hole; 84. Second through hole; 851. Upper shell; 852. Lower shell; 86. Guide structure; 87. Connecting post; 91. First elastic element; 92. Second elastic element; 93. First reset element; 94. Second reset element; 01. First locking mechanism; 02. Second locking mechanism.

[0029] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0033] To facilitate storage and transportation, existing handcarts are typically designed with a folding function to reduce their space occupation. Additionally, to adapt to different pushing environments, the rear wheels of handcarts are usually equipped with a directional or omnidirectional switching mechanism to meet the needs of straight-line pushing or flexible steering.

[0034] However, the existing rear wheel reversing structure is complex and not conducive to achieving quick and convenient switching operations. In addition, the existing folding mechanism is also relatively complicated, requiring users to unlock multiple locking nodes one by one. There are usually many such locking nodes, requiring users to perform unlocking steps on different parts of the frame in sequence, which is cumbersome and time-consuming.

[0035] To address this technical problem, the present invention proposes a vehicle frame assembly.

[0036] Please see Figures 1 to 3 , Figures 9 to 11In one embodiment of the present invention, the frame assembly includes a frame 11, a wheel set 12, a first locking mechanism 01, a second locking mechanism 02, and an unlocking device 2. The wheel set 12 is rotatably disposed at the bottom of the frame 11. The first locking mechanism 01 is disposed on the frame 11 and is used to directionally lock the wheel set 12. The second locking mechanism 02 is disposed on the frame 11 and is used to lock the joints of the frame 11. The unlocking device 2 is disposed on the frame 11 and includes a first sliding unlocking member 20, a second sliding unlocking member 30, a first operating member 40, and a second operating member 50. The first sliding unlocking member 20 is connected to the first... A locking mechanism 01 is driven to the frame; a second sliding unlocking member 30 is driven to the second locking mechanism 02; a first operating member 40 is movably mounted on the frame 11 and has a first driving state that is driven to cooperate with the first sliding unlocking member 20 and a second driving state that is driven to cooperate with the second sliding unlocking member 30; a second operating member 50 is movably mounted on the frame 11 and is configured to trigger the first operating member 40 to switch from the first driving state to the second driving state when subjected to force; thus, the folding or unfolding operation of the frame assembly and the steering switching operation can be performed with one hand, simplifying the operation steps and improving the convenience of operation.

[0037] In the technical solution of this invention, the unlocking device 2 is designed with a transmission switching mechanism to achieve unlocking control of a single operating element adapted to a dual locking mechanism. Specifically, the first operating element 40 has a first transmission state that is in transmission cooperation with the first sliding unlocking element 20 and a second transmission state that is in transmission cooperation with the second sliding unlocking element 30. The second operating element 50 can switch the first operating element 40 from the first transmission state to the second transmission state. Therefore, the first operating element 40 can flexibly adjust its working mode according to the unlocking requirements. It can either choose to form an effective transmission cooperation with the first sliding unlocking element 20 or switch to form a transmission cooperation with the second sliding unlocking element 30 through a switching operation, thereby realizing independent control of any locking function in the dual locking mechanism.

[0038] The state switching process is simple and efficient, requiring only the operation of the second operating component 50, without the need to replace or adjust other parts. This design not only simplifies the overall mechanical structure of the system and reduces the structural complexity of the dual-locking mechanism's unlocking control, but also helps to simplify the unlocking operation process, adapting to the needs of one-handed operation. At the same time, it reduces the possibility of misoperation, thereby improving the ease of operation and user experience of the unlocking device 2 in actual use.

[0039] Specifically, in the first transmission state, the first operating member 40 is connected to the first sliding unlocking member 20 via a transmission method including but not limited to friction transmission, meshing transmission, and rope traction. The first sliding unlocking member 20 is connected to the first locking mechanism 01, which restricts the rotation of the wheel set 12 relative to the frame 11. Therefore, under the action of the first operating member 40, after releasing the locking state of the first locking mechanism 01, the wheel set 12 can rotate relative to the frame 11, allowing the frame assembly to achieve a flexible steering working state. In other words, when it is necessary to switch the wheel frame angle to change the direction of propulsion, only the operation of the first operating member 40 is needed to release the constraint of the first locking mechanism 01 and complete the angle adjustment. The specific structure of the first locking mechanism 01 can be flexibly adjusted and adapted according to the specific structural characteristics and overall structural form of the frame assembly. Designers can choose the most suitable implementation method according to actual application requirements, as long as the requirement of locking the wheel set 12 is met, and no specific limitation is made here.

[0040] In the second transmission state, the first operating member 40 is connected to the second sliding unlocking member 30 via a transmission method including but not limited to friction transmission, meshing transmission, and rope traction. The second sliding unlocking member 30 is connected to the second locking mechanism 02, which restricts the relative rotation of the joints of the frame 11. Therefore, after the locking state of the second locking mechanism 02 is released by the first operating member 40, the relative rotation of the joints of the frame 11 can be allowed, enabling the frame 11 to be folded or unfolded for adjustment. Since the first operating member 40 and the first sliding unlocking member 20 are in a transmission engagement state in the initial state, by adjusting the position of the second operating member 50, the first operating member 40 can be controlled to enter different transmission states, switching the unlocking authority of the first locking mechanism 01 or the second locking mechanism 02. This avoids accidental operation and allows users to switch the unlocking target as needed, meeting the adjustment needs in different scenarios. The specific structure of the second locking mechanism 02 can also be flexibly selected based on the overall structural design, as long as it can stably constrain the joint rotation; no specific limitations are made here.

[0041] In addition, to ensure the normal operation of the unlocking device 2 and its integrated assembly on the frame 11, the unlocking device 2 also includes a housing 80, which is fixed to the frame 11 and forms a cavity that can accommodate at least the first sliding unlocking member 20, the second sliding unlocking member 30, the first operating member 40, and the second operating member 50. In this way, the first operating member 40 and the second operating member 50 can be hidden and protected, extending the service life of the unlocking device 2, reducing the impact of external foreign objects and bumps on the transmission coordination accuracy, improving the overall cleanliness of the frame assembly, and ensuring reliable switching between the first operating member 40 and the second operating member 50 to a certain extent, improving the accuracy of operation, and reducing the risk of changing the transmission state due to accidental external force.

[0042] Optionally, in an embodiment of the present invention, the triggering direction of the first operating member 40 is set at an angle to the triggering direction of the second operating member 50. Compared to schemes where the triggering directions of the first operating member 40 and the second operating member 50 are in the same or opposite directions, this angle setting allows the first operating member 40 and the second operating member 50 to operate in different directions, avoiding accidental contact with the other while operating one, further reducing the probability of misoperation. Furthermore, while maintaining sufficient operating space, the overall layout size is reduced, improving the compactness of the unlocking device 2.

[0043] Specifically, in an embodiment of the present invention, the triggering direction of the first operating member 40 is perpendicular to the triggering direction of the second operating member 50. This arrangement further enhances the ease of use for the user. Specifically, when the user needs to perform one-handed operation, especially during the process of switching to the second transmission state, they only need to firmly grasp the outer shell 80 of the unlocking device 2 with their palm to naturally trigger the second operating member 50 using the strength of their palm; at the same time, the user's fingers can also flexibly operate the first operating member 40. The two actions do not interfere with each other, enabling an efficient and coordinated triggering process, thereby optimizing the overall operating experience.

[0044] Please see Figures 3 to 8 In an embodiment of the present invention, the first sliding unlocking member 20 is connected to the first locking mechanism 01 via a first pulling member 71; the second sliding unlocking member 30 is connected to the second locking mechanism 02 via a second pulling member 72. By driving the first locking mechanism 01 and the second locking mechanism 02 respectively via the first pulling member 71 and the second pulling member 72, the operating force can be reliably and stably transmitted, thereby improving the reliability of unlocking triggering. Of course, in other embodiments, the transmission of the operating force can also employ direct meshing transmission, linkage transmission, etc., which can also achieve the driving effect of the first operating member 40 and the second operating member 50 on the corresponding locking mechanisms, adapting to different installation spaces and structural design requirements.

[0045] Taking the first pulling member 71 and the second pulling member 72 as examples, both of which include a pull rope part 73 and a fixing part 74, one end of the pull rope part 73 is connected to the fixing part 74, and the other end is located in the frame 11 and connected to the corresponding locking mechanism. The fixing part 74 is located in the anti-disengagement groove 75 on the corresponding sliding unlocking member.

[0046] The pull rope section 73 is made of a pull rope or traction cable, which can adapt to the complex wiring space inside the frame 11 and can flexibly adjust its direction according to the installation space. It does not occupy additional structural volume, and because the transmission process of the pull rope or traction cable is stable and not prone to jamming, it can further ensure the smoothness of the unlocking operation and reduce the probability of structural failure. In this embodiment, as... Figure 6As shown, the pull rope part 73 includes a first pull rope part 731 of the first pulling member 71 and a second pull rope part 732 of the second pulling member 72. At this time, the first pull rope part 731 can be connected to the first locking mechanism 01 to ensure stable transmission of force, thereby realizing the unlocking drive of the first locking mechanism 01. Similarly, the second pull rope part 732 can be connected to the second locking mechanism 02 to ensure stable transmission of force, thereby realizing the unlocking drive of the second locking mechanism 02.

[0047] The fixing part 74 is connected to the end of the pull rope part 73. Positioning is achieved by engaging the fixing part 74 into the anti-detachment groove 75 of the sliding unlocking member. The limiting cooperation between the fixing part 74 and the anti-detachment groove 75 reduces the possibility of loosening under pulling force, improving the stability and reliability of the pulling transmission. The anti-detachment groove 75 includes a first groove for the fixing part 74 and a second groove for the pull rope part 73. The width of the second groove is smaller than the width of the first groove, and the diameter of the pull rope part 73 is smaller than the size of the fixing part 74. This facilitates the smooth passage of the pull rope part 73 through the second groove and also reliably limits the fixing part 74 through the first groove, reducing the possibility of the fixing part 74 protruding from the anti-detachment groove 75 during pulling. The inlet and outlet for the fixing part 74 to engage with the anti-detachment groove 75 can be either directly exposed or covered by a structural component that accommodates the sliding unlocking member. In this embodiment, as... Figure 6 and Figure 11 As shown, the fixing part 74 includes a first fixing part 741 and a second fixing part 742. At this time, the first fixing part 741 is engaged in the first anti-disengagement groove 751 of the first sliding unlocking member 20, and the second fixing part 742 is engaged in the second anti-disengagement groove 752 of the second sliding unlocking member 30, thereby realizing a stable connection between the first pulling member 71 and the first sliding unlocking member 20, and a stable connection between the second pulling member 72 and the second sliding unlocking member 30, thereby ensuring the reliable driving of the unlocking device 2 on the first locking mechanism 01 and the second locking mechanism 02.

[0048] Please see Figure 3 , Figures 5 to 8 In an embodiment of the present invention, the frame assembly further includes a support member 60 that is in transmission cooperation with the second operating member 50, and the first sliding unlocking member 20 and the second sliding unlocking member 30 are both slidably mounted on the support member 60.

[0049] The second operating element 50 is used to drive the support element 60 to move, thereby switching the first sliding unlocking element 20 or the second sliding unlocking element 30 driven by the support element 60 to form an abutment engagement with the first operating element 40. Specifically, the support element 60 serves as a support base for the first sliding unlocking element 20 and the second sliding unlocking element 30, which can constrain the sliding path and direction of the first sliding unlocking element 20 and the second sliding unlocking element 30, ensuring the stability of the unlocking action and effectively preventing deviation or jamming. Under the active drive of the second operating element 50, it can also transmit power to the support element 60 itself. As the support element 60 moves accordingly, it can synchronously drive the first sliding unlocking element 20 and the second sliding unlocking element 30 to move together. Thus, the first operating element 40 can flexibly select and engage according to actual needs, thereby driving the first sliding unlocking element 20 or the second sliding unlocking element 30 to complete the corresponding unlocking operation, realizing the selectivity of operation and the switchability of unlocking triggered by a single operating element. However, in other embodiments, the second operating member 50 is used to drive the first operating member 40 to move so that the first operating member 40 forms an abutment engagement with the first sliding unlocking member 20 or the second sliding unlocking member 30.

[0050] The slidable arrangement of the first sliding unlocking member 20 and the second sliding unlocking member 30 on the support member 60 facilitates the first sliding unlocking member 20 and the second sliding unlocking member 30 to respond to the driving action of the first operating member 40 and complete the corresponding unlocking action. At the same time, it effectively reduces the interference of the support member 60 on the first sliding unlocking member 20 and the second sliding unlocking member 30 when the support member 60 moves with the second operating member 50.

[0051] Specifically, in an embodiment of the present invention, the first sliding unlocking member 20 has a first triggering part 22 extending out of the support member 60, and the second sliding unlocking member 30 has a second triggering part 32 extending out of the support member 60. In the first transmission state, the first triggering part 22 abuts against the first operating member 40, and in the second transmission state, the second triggering part 32 abuts against the first operating member 40.

[0052] Understandable, such as Figure 6 and Figure 8 As shown, the first sliding unlocking component 20 includes a first unlocking body 21 and a first trigger part 22. The first unlocking body 21 is provided with a first anti-detachment groove 751 for fixing the first pulling member 71, and is entirely placed in the first inner cavity of the support member 60. This provides an installation position for the first pulling member 71, ensuring the reliability of unlocking, and also increases the stability of the cooperation between the first sliding unlocking component 20 and the support member 60. The first trigger part 22 protrudes from the first unlocking body 21 so that the first trigger part 22 extends out of the support member 60 and abuts against the first operating member 40.

[0053] Similarly, the second sliding unlocking component 30 includes a second unlocking body 31 and a second triggering part 32. The second unlocking body 31 is provided with a second anti-disengagement groove 752 for fixing the second pulling member 72, and is entirely placed in the second inner cavity of the support member 60. This provides an installation position for the second pulling member 72, ensuring the reliability of unlocking, and also increases the stability of the cooperation between the second sliding unlocking component 30 and the support member 60. The second triggering part 32 protrudes from the second unlocking body 31 so that the second triggering part 32 extends out of the support member 60 and abuts against the second operating member 50.

[0054] Driven by the second operating member 50, the support member 60 can drive the first sliding unlocking member 20 or the second sliding unlocking member 30 to form an abutment with the first operating member 40, thereby realizing the switching of the first operating member 40 between the first transmission state and the second transmission state.

[0055] To enhance the uniqueness of the sliding of the first sliding unlocking member 20 and the second sliding unlocking member 30 on the support member 60, in an embodiment of the present invention, the support member 60 is provided with a first guide hole 61 and a second guide hole 62 extending along a first direction. The first trigger part 22 passes through the first guide hole 61, and the second trigger part 32 passes through the second guide hole 62. The cooperation between the first trigger part 22 and the first guide hole 61 restricts the sliding direction of the first sliding unlocking member 20. Similarly, the cooperation between the second trigger part 32 and the second guide hole 62 restricts the sliding direction of the second sliding unlocking member 30, preventing misalignment during sliding and ensuring smooth unlocking operation.

[0056] It should be noted that the first direction is perpendicular to the operating direction of the second operating member 50, and also perpendicular to the operating direction of the first operating member 40. At this time, both the first pulling member 71 and the second pulling member 72 are located to the side of the support member 60.

[0057] Furthermore, the first trigger portion 22 extends outside the first guide hole 61, and its end is always exposed outside the first guide hole 61. For example... Figure 8 As shown, when the first fixing portion 741 of the first pulling member 71 is spaced apart from and staggered from the first trigger portion 22 along the first direction, the first fixing portion 741 will be located inside the edge of the first guide hole 61 and will not be exposed. Of course, the first fixing portion 741 of the first pulling member 71 can also be aligned with the first trigger portion 22 along the first direction, in which case the first fixing portion 741 will be exposed outside the first guide hole 61 along with the first trigger portion 22. Figure 6As shown, the second fixing part 742 of the second pulling member 72 is aligned with the second trigger part 32 along the first direction. At this time, the second fixing part 742 and the second trigger part 32 are exposed together outside the second guide hole 62. This arrangement, where the second fixing part 742 and the trigger part are exposed together in the second guide hole 62, allows assembly personnel to easily and visually confirm whether the pulling member is installed correctly, reducing the probability of assembly errors. It also facilitates direct observation of the status of the fixing part 74 during later maintenance, allowing for initial troubleshooting without additional disassembly. Concealing the fixing part 74 inside the edge of the guide hole helps reduce the possibility of the fixing part 74 disengaging from the corresponding sliding unlocking member.

[0058] Please see Figure 11 In an embodiment of the present invention, the first triggering part 22 and the second triggering part 32 are arranged side by side along the operating direction of the second operating member 50, and extend in opposite directions. By arranging the first triggering part 22 and the second triggering part 32 side by side along the operating direction of the second operating member 50, it is convenient to control the two triggering parts simultaneously through a single linkage operation, achieving a more efficient and faster switching mechanism. This not only reduces the repetition of operation steps, but also helps to optimize the user's operating experience, simplify the unlocking process, and improve the convenience of user operation. The arrangement of the two extending in opposite directions can isolate the corresponding contact positions of the first triggering part 22 and the second triggering part 32 with the first operating member 40, reducing the risk of mutual interference between the first triggering part 22 and the second triggering part 32 during operation. At the same time, the reverse extension structure can adapt to the triggering requirements of the first operating member 40 at different positions, ensuring a smooth and stable operation process.

[0059] In addition, with the structure of the first trigger part 22 and the second trigger part 32 extending in opposite directions, the first unlocking body 21 and the second unlocking body 31 are arranged close to each other, further reducing the side-by-side spacing between the first sliding unlocking member 20 and the second sliding unlocking member 30, reducing the space occupied by the support member 60 and the first sliding unlocking member 20 and the second sliding unlocking member 30 as a whole, and improving the compactness of the unlocking device 2.

[0060] Optionally, in an embodiment of the present invention, the first operating member 40 includes an operating body 41 and an extension arm 42. One end of the extension arm 42 is connected to the operating body 41, and the other end extends toward the first trigger part 22. The extension arm 42 is used to abut against the first trigger part 22 or the second trigger part 32. At this time, the operating body 41 is used for the user to apply force, and the extension arm 42 moves synchronously with the movement of the operating body 41, thereby abutting against the first trigger part 22 or the second trigger part 32, and completing the pushing trigger action of the corresponding trigger part under continuous force.

[0061] Furthermore, since the first sliding unlocking member 20 and the second sliding unlocking member 30 are arranged side by side along the operating direction of the second operating member 50, and the first trigger part 22 and the second trigger part 32 on them extend in opposite directions, in the embodiment of the present invention, two extension arms 42 are provided on the same side of the operating body 41, and the two extension arms 42 are spaced apart along the operating direction of the second operating member 50.

[0062] Thus, each extension arm 42 is equipped with a corresponding triggering part, so that triggering can be completed by the extension arm 42 cooperating with the corresponding first triggering part 22 or second triggering part 32. The structure arranged at intervals along the operating direction of the second operating member 50 can match the side-by-side arrangement of the first triggering part 22 and the second triggering part 32 in the operating direction, so that the extension arm 42 can be accurately aligned with the corresponding triggering part, avoiding misalignment and ensuring the accuracy of the triggering action. A clearance space can also be formed between the two extension arms 42, allowing the support body supporting the first sliding unlocking member 20 and the second sliding unlocking member 30 to make way, improving the movement reliability of the support member 60.

[0063] Please see Figure 11 In an embodiment of the present invention, the distance between the driving surfaces on the two extension arms 42 is greater than the maximum distance between the first trigger part 22 and the second trigger part 32. With this limitation, when the operating body 41 drives the two extension arms 42 to move synchronously, only the extension arm 42 located at the trigger position will have its driving surface contact the corresponding trigger part (first trigger part 22 or second trigger part 32) and apply an effective pushing force. Simultaneously, although the other extension arm 42 moves with the operating body 41, due to a sufficient safety gap between its driving surface and the trigger part on the opposite side, the two will not make any contact during the entire movement. This completely avoids the non-working side extension arm 42 accidentally touching a non-corresponding trigger part during the triggering process, thereby effectively preventing erroneous triggering or interfering operations and improving the reliability and accuracy of triggering.

[0064] Please see Figure 3 In an embodiment of the present invention, two first triggering parts 22 are provided along the first direction of the support member 60, the first direction being perpendicular to the operation direction of the second operating member 50 and also perpendicular to the operation direction of the first operating member 40. The extension arm 42 includes two extensions 43 corresponding to the two first trigger portions 22. The first driving surface 431 and the second driving surface 432 facing each other of the two extensions 43 are gradually widened in the direction close to the first trigger portion 22.

[0065] Understandably, the support member 60 is provided with two first sliding unlocking members 20 along its first direction, and each first sliding unlocking member 20 is equipped with a corresponding first trigger part 22. The first trigger part 22 extends out of the support member 60 and is abutted by the extension arm 42. The first driving surface 431 and the second driving surface 432 on the extension arm 42 are set as a gradually expanding structure. After the first driving surface 431 and the second driving surface 432 abut against the two first trigger parts 22 respectively, as the extension arm 42 gradually approaches the first trigger part 22 with the operating body 41, the gradually expanding driving surface can gradually form a stable abutment with the first trigger part 22. There will be no jamming or failure to fit due to the fixed spacing of the driving surfaces. At the same time, with the directional sliding of the first trigger part 22 on the support member 60, the two first trigger parts 22 eventually come together and pull the first pulling member 71 to complete the control and unlocking of the first locking mechanism 01. This structure utilizes a gradually expanding drive surface design, which can accommodate the initial spacing error between the two first trigger parts 22. It does not require excessively high processing accuracy of the extension part 43, thus reducing processing difficulty and production cost, while ensuring the smoothness and reliability of trigger operation, and further guaranteeing the operating feel.

[0066] Similarly, two second sliding unlocking members 30 are provided on the support member 60 along its first direction, and each second sliding unlocking member 30 is equipped with a corresponding second trigger part 32. The second trigger part 32 extends out of the support member 60 for the extension arm 42 to abut against. At this time, the other extension arm 42 includes two extension parts 43 corresponding to the two second trigger parts 32. The first driving surface 431 and the second driving surface 432 facing each other are gradually widened in the direction close to the second trigger part 32. Then, by the abutment drive of the two second trigger parts 32 by the first driving surface 431 and the second driving surface 432, the two second trigger parts 32 are effectively driven to move closer to each other, and by pulling the second pulling member 72, the control and unlocking of the second locking mechanism 02 is completed.

[0067] To ensure the driving stability of the extension arm 42 to the two trigger parts, in an embodiment of the present invention, the two first sliding unlocking members 20 are connected by a first elastic member 91; such as Figure 3 and Figure 10As shown, a first elastic element 91, which can be a spring, is sandwiched between the two facing side walls of the two first unlocking bodies 21. In its natural state, the first elastic element 91 keeps the two first trigger parts 22 in the initial locked position with their sides spread apart, and effectively prevents the two first sliding unlocking parts 20 from coming out of the support member 60. When the first driving surface 431 and the second driving surface 432 of the extension arm 42 press against the two first trigger parts 22 respectively, the two first unlocking bodies 21 move closer to each other and compress the first elastic element 91 together, causing the two first trigger parts 22 to move from the initial locked position to the unlocked position. At this time, the first sliding unlocking part 20 can unlock the first locking mechanism 01. When the driving surface of the extension arm 42 withdraws from the contact with the first trigger parts 22, the first elastic element 91 can push the two first unlocking bodies 21 to automatically reset and spring back, returning to the spread-out locked state, ensuring that the locking structure resets stably and reliably.

[0068] Correspondingly, a second elastic member 92 is also sandwiched between the two second sliding unlocking members 30. The function of the second elastic member 92 is the same as that of the first elastic member 91, which is to maintain the initial locked state of the second trigger part 32 and drive the second trigger part 32 to automatically reset after unlocking.

[0069] To ensure the reliability of the installation of the elastic element, in an embodiment of the present invention, the first sliding unlocking member 20 is provided with a first limiting groove 23 to accommodate the first elastic element 91. Figure 3 and Figure 10 As shown, the first unlocking body 21 of the first sliding unlocking member 20 has a first limiting groove 23 on the side near the other first sliding unlocking member 20. The inlet and outlet of the first limiting groove 23 can be set towards or away from the second sliding unlocking member 30 according to actual assembly needs, so as to cooperate with the inner cavity wall of the support member 60 to form an effective enclosure and limiting structure, thereby reliably constraining and limiting the setting position of the first elastic member 91 and preventing it from accidentally coming out or shifting during operation. At the same time, a side opening is provided on the side of the first limiting groove 23 facing the adjacent other first sliding unlocking member 20. The setting of this side opening facilitates the free end of the first elastic member 91 to extend towards the other first sliding unlocking member 20, ensuring the smooth realization of the linkage and function between the two first sliding unlocking members 20.

[0070] Correspondingly, the second sliding unlocking member 30 is provided with a second limiting groove 33 to accommodate the second elastic member 92. The setting and function of the second limiting groove 33 are the same as those of the first limiting groove 23. It is used to constrain the installation position of the second elastic member 92, prevent it from shifting and coming out during operation, and at the same time ensure the smooth linkage and function between the two second sliding unlocking members 30.

[0071] To facilitate the integration and assembly of the unlocking device 2 onto the frame 11 and its corresponding operation, please refer to [link / reference needed]. Figures 1 to 3 , Figures 10 to 11 In an embodiment of the present invention, the frame 11 has a handrail tube 111; the outer shell 80 has a fixed cavity 81 and a movable cavity 82 that are connected to each other, the handrail tube 111 passes through the fixed cavity 81, the first operating member 40 and the second operating member 50 are both movably installed in the movable cavity 82, and the movable cavity 82 is provided with a first through hole 83 and a second through hole 84 for respectively exposing the first operating member 40 and the second operating member 50.

[0072] Specifically, the handrail tube 111 has a hollow structure, and the handrail tube 111 has an avoidance notch corresponding to the unlocking device 2. This facilitates the insertion and concealment of the first pulling member 71 and the second pulling member 72, and also provides sufficient space for the support member 60 and other components to move. Without affecting the movement of the support member 60, the internal space of the handrail tube 111 is fully utilized, thereby improving the compactness of the unlocking device 2 and the handrail tube 111.

[0073] The outer shell 80 includes an upper shell 851 and a lower shell 852, which are spliced ​​together to form a fixed cavity 81 and a movable cavity 82 that are interconnected. The fixed cavity 81 is fitted and sleeved on the outside of the handrail tube 111, thereby achieving a fixed connection between the outer shell 80 and the handrail tube 111. The connection method between the upper shell 851 and the lower shell 852 includes, but is not limited to, snap-fit ​​and screw connection. For example, in this embodiment, the handrail tube 111 has a through hole, and the upper shell 851 is equipped with a connecting post 87 that passes through the through hole, and the connecting post 87 has an upper connecting hole. After the lower shell 852 and the upper shell 851 are spliced ​​together, the lower connecting hole of the lower shell 852 is aligned with the upper connecting hole. At this time, fasteners such as screws can be passed through the lower connecting hole and screwed into the upper connecting hole to achieve a reliable fixation between the outer shell 80 and the handrail tube 111. The upper shell 851 and the lower shell 852 can also be aligned by a concave-convex interlocking method.

[0074] The movable cavity 82 provides installation space for components such as the support member 60, the first sliding unlocking member 20, and the second sliding unlocking member 30, and allows them to move within the cavity to unlock the first locking mechanism 01 or the second locking mechanism 02. To improve the sliding reliability of the support member 60, the upper shell 851 and the lower shell 852 can be joined to form a guide structure 86. This guide structure 86 can be a guide plate surrounding the outside of the support body of the support member 60, extending towards the sliding direction of the support member 60. This guide plate can limit the offset and swaying of the support member 60 during movement, ensuring that the support member 60 slides stably along a preset path.

[0075] Furthermore, the guide structure 86 may be provided with a first clearance groove for the first pulling member 71 or the second pulling member 72 to pass through, and a second clearance groove for the first operating member 40 to pass through, so as to avoid the movement stroke of each pulling member and the first operating member 40, preventing them from getting stuck or interfering with the outer casing 80, thereby ensuring smooth unlocking operation. At the same time, the groove wall of the second clearance groove can also guide the movement path of the first operating member 40 to a certain extent, improving the operational stability of the first operating member 40.

[0076] Furthermore, in order to facilitate the user's application of force to the first operating member 40 and the second operating member 50, the upper shell 851 or the lower shell 852 is provided with a first through hole 83 and a second through hole 84 that connects to the movable cavity 82. The first operating member 40 can be inserted through the first through hole 83, and the second operating member 50 can be inserted through the second through hole 84, so that the operating end of the operating member can be exposed outside the shell 80, making it convenient for the user to press or turn it.

[0077] Please see Figure 10 In an embodiment of the present invention, the operating body 41 of the first operating member 40 is limited to the first through hole 83 and extends at least partially out of the first through hole 83. The operating body 41 may include a first operating part and a second operating part. The radial dimension of the first operating part is greater than the dimension of the second operating part and less than or equal to the first through hole 83. Thus, the first operating part extends through the first through hole 83, which facilitates the user to apply pressure. The stepped structure formed by the first operating part and the second operating part can effectively limit the transition displacement of the first operating member 40 to the outside of the movable cavity 82, thereby improving the installation reliability of the first operating member 40.

[0078] Please see Figure 10 In an embodiment of the present invention, the support member 60 has a positioning post 63 extending out of the second through hole 84. The second operating member 50 is sleeved on the positioning post 63 and engages with the second through hole 84. The support member 60 includes a support body and a positioning post 63. The support body is used to install the first sliding unlocking member 20 and the second sliding unlocking member 30. One end of the positioning post 63 is connected to the support body, and the other end can pass through the second through hole 84, thereby forming a tight fit and connection with the second operating member 50. By setting the positioning post 63, the specific position of the support body in the movable cavity 82 can be determined, ensuring the accuracy of the relative positional relationship between the various structures and improving assembly efficiency. It can also increase the effective contact area between the support member 60 and the second operating member 50, enhancing the connection stability between the second operating member 50 and the support member 60.

[0079] Furthermore, to ensure the reliable operation of the second operating member 50, a limiting step 51 is provided on the outer wall of the second operating member 50. When the second operating member 50 is subjected to external force and moves outward, the limiting step 51 will abut against the edge of the second through hole 84, thus limiting the movement of the second operating member 50 without affecting its normal pressing and sliding operation, and preventing it from detaching from the housing 80 through the second through hole 84, thereby ensuring the reliability of its operation. However, in other embodiments, the second operating member 50 is directly connected to the support body, and the travel limit of the second operating member 50 is achieved by the support body abutting against the edge of the second through hole 84, eliminating the need to process the limiting step 51 on the outer wall of the second operating member 50 and simplifying the processing flow of the second operating member 50.

[0080] Please see Figure 4 , Figure 10 and Figure 11 In an embodiment of the present invention, the first operating member 40 is elastically connected to the support member 60 via a first reset member 93. By providing the first reset member 93 between the first operating member 40 and the support member 60, the first reset member 93, having elasticity (e.g., a spring), automatically resets the first operating member 40 after it completes the unlocking action, keeping it in its initial position for easy unlocking and preventing it from being stuck in the unlocking position and affecting the locking function of the frame assembly, further improving operational convenience and structural locking reliability. Specifically, the support body of the support member 60 has a first limiting protrusion facing the outer wall of the first operating member 40, and the first operating member 40 has a limiting groove that can accommodate the first reset member 93. The two ends of the first reset member 93 are respectively connected to the bottom of the first limiting protrusion and the limiting groove. This not only limits the deformation direction of the first reset member 93, preventing it from being force-biased, but also eliminates the need for additional positioning structures, simplifying the overall assembly process. When the first operating member 40 is pressed to unlock, the first operating member 40 moves towards the supporting body, and the first reset member 93 is squeezed and contracted to accumulate elastic potential energy. When the external force is removed, the first reset member 93 releases elastic potential energy, pushing the first operating member 40 to move in the opposite direction to automatically reset, realizing the automatic return of the first operating member 40 without the need for manual return by the user.

[0081] Please see Figure 4 , Figure 10 and Figure 11In an embodiment of the present invention, the second operating member 50 is elastically connected to the housing 80 via a second reset member 94. Since the second operating member 50 moves in unison with the support member 60, the second reset member 94 can be positioned between the housing 80 and the support member 60, fully utilizing the space on the side of the support member 60 away from the second operating member 50 to achieve a compact structural design. Specifically, the second reset member 94 also possesses elasticity, such as a spring, enabling it to remain in its initial position after the second operating member 50 completes the unlocking action, facilitating the next unlocking operation. This prevents the second operating member 50 from being stuck in the unlocking position and affecting the locking function of the frame assembly, further improving operational convenience and the reliability of the structural locking.

[0082] The support body of the support member 60 has a second limiting protrusion on its outer wall opposite to the second operating member 50. The inner wall of the outer shell 80 has a limiting groove that can accommodate the second reset member 94. The two ends of the second reset member 94 are connected to the bottom of the second limiting protrusion and the limiting groove, respectively. This not only limits the deformation direction of the second reset member 94 and prevents it from being skewed by force, but also eliminates the need for additional positioning structures, simplifying the overall assembly process. When the second operating member 50 is pressed to unlock, it pushes the support body to move. At this time, the second reset member 94 is compressed and contracts to accumulate elastic potential energy. When the external force is removed, the second reset member 94 releases its elastic potential energy and pushes the second operating member 50 to move in the opposite direction through the support member 60 to automatically reset, achieving automatic return of the second operating member 50 without the need for manual return by the user.

[0083] The operation steps for unlocking device 2 are as follows: When it is necessary to adjust the angle of the wheelset 12 to change the direction of propulsion, the operator only needs to press the first operating member 40 to move it toward the support member 60. At this time, the two first sliding unlocking members 20 approach each other under the action of the first driving surface 431 and the second driving surface 432, and then drive the corresponding first locking mechanism 01 to perform the unlocking action through the first pulling member 71, thereby releasing the constraint of the first locking mechanism 01 on the wheelset 12, so that the wheelset 12 can rotate freely relative to the frame 11, allowing the frame assembly to enter a flexible steering working state.

[0084] When the frame 11 needs to be folded for storage, first press the second operating member 50, causing the support member 60 to shift, thereby releasing the abutment relationship between the first sliding unlocking member 20 and the first operating member 40. This allows the two second sliding unlocking members 30 to abut against the first driving surface 431 and the second driving surface 432 of the first operating member 40, respectively. Simultaneously, pressing the first operating member 40 moves it toward the support member 60, causing the two second sliding unlocking members 30 to move closer together. This, in turn, drives the corresponding second locking mechanism 02 through the second pulling member 72, releasing the constraint of the second locking mechanism 02 on the joints of the frame 11, allowing relative rotation of the joints and achieving the folding of the frame 11. During this process, since the two first sliding unlocking members 20 are no longer subjected to the squeezing action of the first driving surface 431 and the second driving surface 432, they will move and reset under the elastic force of the first elastic member 91, returning to the initial locked state, ensuring a stable and reliable reset of the locking structure.

[0085] The present invention also proposes a trolley, which includes a frame assembly. The specific structure of the frame assembly is as described in the above embodiments. Since the trolley adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0086] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A vehicle frame assembly, characterized in that, include: A frame and a wheel assembly, wherein the wheel assembly is rotatably disposed at the bottom of the frame; A first locking mechanism, disposed on the frame, is used to directionally lock the wheel assembly; A second locking mechanism is provided on the frame for locking the joints of the frame; as well as An unlocking device is disposed on the frame, the unlocking device comprising: The outer casing is provided on the frame; The first sliding unlocking component is connected to the first locking mechanism via a transmission connection; The second sliding unlocking component is connected to the second locking mechanism via a transmission connection; The first operating component is movably mounted on the housing and has a first transmission state that is in transmission cooperation with the first sliding unlocking component and a second transmission state that is in transmission cooperation with the second sliding unlocking component. The second operating element is movably mounted on the housing and configured to trigger the first operating element to switch from the first transmission state to the second transmission state when subjected to force.

2. The frame assembly as claimed in claim 1, characterized in that, The triggering direction of the first operating element is set at an angle to the triggering direction of the second operating element.

3. The frame assembly as claimed in claim 2, characterized in that, The triggering direction of the first operating element is perpendicular to the triggering direction of the second operating element.

4. The frame assembly as claimed in claim 1, characterized in that, The first sliding unlocking component is connected to the first locking mechanism via a first pulling component, and the second sliding unlocking component is connected to the second locking mechanism via a second pulling component.

5. The frame assembly as claimed in claim 4, characterized in that, The first pulling member includes a first pull rope part and a first fixing part. One end of the first pull rope part is connected to the first fixing part, and the other end is disposed in the frame and connected to the first locking mechanism. The first fixing part is disposed in the first anti-detachment groove on the first sliding unlocking member. And / or, the second pulling member includes a second pull rope portion and a second fixing portion, one end of the second pull rope portion is connected to the second fixing portion, the other end is disposed in the frame and connected to the second locking mechanism, and the second fixing portion is disposed in the second anti-disengagement groove on the second sliding unlocking member.

6. The frame assembly as claimed in any one of claims 1 to 5, characterized in that, The frame assembly also includes a support member that is in transmission cooperation with the second operating member, and both the first sliding unlocking member and the second sliding unlocking member are slidably mounted on the support member.

7. The frame assembly as claimed in claim 6, characterized in that, The first sliding unlocking member has a first trigger portion extending out of the support member, and the second sliding unlocking member has a second trigger portion extending out of the support member. In the first transmission state, the first trigger portion abuts against the first operating member, and in the second transmission state, the second trigger portion abuts against the first operating member.

8. The frame assembly as claimed in claim 7, characterized in that, The first triggering part and the second triggering part are arranged side by side along the operating direction of the second operating member, and they extend in opposite directions.

9. The frame assembly as claimed in claim 8, characterized in that, The first operating component includes an operating body and an extension arm. One end of the extension arm is connected to the operating body, and the other end extends toward the first trigger part. The extension arm is used to abut and cooperate with the first trigger part or the second trigger part.

10. The frame assembly as claimed in claim 9, characterized in that, Two extension arms are provided on the same side of the operating body, and the two extension arms are spaced apart along the operating direction of the second operating member.

11. The frame assembly as claimed in claim 10, characterized in that, The distance between the driving surfaces on the two extension arms is greater than the maximum distance between the first trigger and the second trigger.

12. The frame assembly as claimed in claim 10, characterized in that, Two first triggering parts are provided along a first direction of the support member, the first direction being perpendicular to the operating direction of the second operating member and also perpendicular to the operating direction of the first operating member; The extension arm includes two extensions corresponding to the two first trigger portions, and the first driving surface and the second driving surface facing each other of the two extensions are gradually widened in the direction close to the first trigger portion.

13. The frame assembly as claimed in claim 12, characterized in that, The two first sliding unlocking components are connected by a first elastic element; And / or, the first sliding unlocking member is provided with a first limiting groove for accommodating the first elastic member.

14. The frame assembly as claimed in claim 12, characterized in that, There are two second trigger parts, and the two second sliding unlocking parts are connected by a second elastic element; And / or, the second sliding unlocking member is provided with a second limiting groove for accommodating the second elastic member.

15. The frame assembly as claimed in claim 7, characterized in that, The support member is provided with a first guide hole and a second guide hole extending along a first direction, the first trigger part passing through the first guide hole and the second trigger part passing through the second guide hole.

16. The frame assembly as claimed in claim 6, characterized in that, The frame has handrail tubes; The outer shell has a connected fixed cavity and a movable cavity. The handrail tube passes through the fixed cavity. The first operating member and the second operating member are both movably installed in the movable cavity. The movable cavity is provided with a first through hole and a second through hole for respectively exposing the first operating member and the second operating member.

17. The frame assembly as claimed in claim 16, characterized in that, The first operating element is elastically connected to the support element via a first reset element; And / or, the second operating element is elastically connected to the housing via a second reset element.

18. The frame assembly as claimed in claim 16, characterized in that, The operating body of the first operating member is limited and matched with the first through hole, and at least partially extends out of the first through hole; And / or, the support member has a positioning post extending out of the second through hole, the second operating member is sleeved on the positioning post and engages with the second through hole; And / or, the housing is provided with a guide structure, and the support member is guided and installed on the guide structure.

19. A trolley, characterized in that, Includes the frame assembly as described in any one of claims 1 to 18.

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