Ladder assembly and roof platform device having it

Abstract

This utility model provides a ladder assembly and a roof platform device having the same. The ladder assembly includes: a mounting frame, a ladder body, and a locking body. The mounting frame connects to the longitudinal rails and / or platform assembly on the vehicle roof. The ladder body is connected to the mounting frame. The ladder body includes at least two folded sections connected together, allowing the ladder body to be folded or unfolded. The locking body is mounted on the mounting frame. The locking body includes a vertically movable pin. The ladder section furthest from the mounting frame has a corresponding insertion structure. When the ladder body is folded, the pin can be inserted into the insertion structure to restrict the ladder body from unfolding. The insertion structure is located in the middle of the ladder section furthest from the mounting frame, and the locking body is located above and in the center of the ladder section furthest from the mounting frame. When the ladder assembly is folded, the ladder section furthest from the mounting frame is less likely to collide with adjacent ladder sections, thus reducing noise and improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of ladder assembly and a roof platform device having the same. Background Technology

[0002] Currently, some vehicles are equipped with rooftop platforms for storing luggage or setting up tents, thereby increasing the vehicle's carrying capacity and space utilization. Furthermore, to facilitate user access to the roof, these rooftop platforms typically include a folding ladder. This folding ladder consists of a vertically extending mounting frame and multiple hinged ladder sections, which can be sequentially retracted into the mounting frame's receiving cavity from the inside out. The mounting frame also features a locking mechanism that engages with the outermost ladder section in the folded state via a pin, preventing outward movement of the ladder sections and keeping it folded. However, current folding ladders often experience collisions and rattles between the ladder sections while the vehicle is in motion, resulting in a less than ideal user experience.

[0003] The inventors discovered that in current folding ladders, the locking mechanism is located on one side of the ladder section. When the locking pin engages with the outermost ladder section, the force on the outermost section is biased to one side, causing uneven force distribution on both sides. This makes the other side of the outermost ladder section prone to warping. When the vehicle is in motion and experiences bumps, the outermost ladder section is likely to collide with the inner ladder section, producing abnormal noise. Utility Model Content

[0004] In view of the above problems, the present invention is proposed to provide a ladder assembly and a roof platform device having the above problems in order to overcome or at least partially solve the above problems.

[0005] The present invention aims to solve the problem of uneven force distribution when the ladder sections of a folding ladder are locked by the locking body, so as to avoid abnormal noise between the ladder sections and improve the user experience.

[0006] Specifically, this utility model proposes a ladder assembly.

[0007] This utility model also proposes a roof platform device.

[0008] The ladder assembly of this utility model includes: a mounting frame for connecting longitudinal rails and / or platform components on the top of a vehicle; a ladder body connected to the mounting frame; the ladder body includes at least two folded sections connected together to allow the ladder body to be folded or unfolded; and a lock body disposed on the mounting frame; the lock body includes a vertically movable pin, and the ladder section furthest from the mounting frame has a corresponding insertion structure; when the ladder body is in a folded state, the pin can be inserted into the insertion structure to restrict the ladder body from unfolding; wherein the insertion structure is located at the middle of the ladder section furthest from the mounting frame, and the lock body is located above and in the center of the ladder section furthest from the mounting frame.

[0009] In some embodiments, the lock body is a combination lock, configured to unlock the lock body by entering a corresponding password, so that the pin disengages from the plugging structure.

[0010] In some embodiments, the mounting bracket defines a receiving cavity; when the ladder body is in a folded state, all the ladder sections are sequentially received within the receiving cavity from the inside out; the ladder body includes: an upper ladder section connected to the receiving cavity; a lower ladder section hinged to the bottom of the upper ladder section; the lower ladder section includes two first vertical bars connected by a plurality of crossbars; a second vertical bar, which is slidably connected to one of the first vertical bars; and a third vertical bar, which is slidably connected to the other of the first vertical bars.

[0011] In some embodiments, the top of the receiving cavity is provided with a first protrusion and a second protrusion, the first protrusion and the second protrusion being configured such that, when the ladder is in a folded state, the two first vertical rods respectively contact and abut against the first protrusion and the second protrusion; and / or,

[0012] A first permanent magnet is disposed on the first protrusion so that the first protrusion is magnetically connected to one of the first vertical rods; a second permanent magnet is disposed on the second protrusion so that the second protrusion is magnetically connected to another of the first vertical rods; and / or,

[0013] At least one third permanent magnet is provided at the bottom of the receiving cavity so that when the ladder is in a folded state, the upper ladder section is magnetically connected to the receiving cavity.

[0014] In some embodiments, each of the first vertical rods defines a vertically extending guide cavity; the inner wall surface of the guide cavity is provided with vertically extending guide ribs;

[0015] The second vertical rod is movably disposed within a guide cavity of the first vertical rod in the vertical direction; the second vertical rod is provided with a first mating groove extending vertically, and a guide rib of the first vertical rod is disposed in the first mating groove;

[0016] The third vertical rod is movably disposed within the guide cavity of the other first vertical rod in the vertical direction; the third vertical rod is provided with a second mating groove extending vertically, and the guide rib of the other first vertical rod is disposed in the second mating groove.

[0017] In some embodiments, a first vertical rod is provided with a plurality of first through holes, which are spaced apart in the vertical direction; a second vertical rod is provided with a first insertion hole corresponding to the first through hole; the ladder assembly further includes a first plug-in member, which is sequentially plugged into one of the plurality of first through holes and into the first insertion hole;

[0018] Another first vertical rod is provided with a plurality of second through holes, which are spaced apart in the vertical direction; the third vertical rod is provided with a second insertion hole corresponding to the second through hole; the ladder assembly also includes a second plug-in member, which is sequentially inserted into one of the plurality of second through holes and the second insertion hole.

[0019] In some embodiments, the ladder sections are magnetically connected to cause them to be locked relative to each other after the ladder body is folded.

[0020] In some embodiments, the mounting bracket includes: a frame; a first housing covering the frame; the first housing defining the receiving cavity; a second housing disposed on the first housing and located at the front and / or rear of the receiving cavity, and the second housing being fixedly connected to the first housing by a fastening structure extending laterally; the first housing and the second housing fitting together in a convex-concave fit.

[0021] In some embodiments, the frame is provided with at least one fourth permanent magnet so that the frame can be magnetically connected to the longitudinal rails and / or platform components on the top of the vehicle via the fourth permanent magnet.

[0022] The roof platform device of this utility model includes: a platform assembly configured to be connected to the top of the vehicle; and a ladder assembly as described in any of the preceding claims, the ladder assembly being connected to the platform assembly via a mounting bracket.

[0023] The ladder assembly of this utility model embodiment includes a mounting frame, a ladder body connected to the mounting frame, and a lock body. The ladder body includes multiple folded ladder sections. The lock body can lock the ladder section furthest from the mounting frame among the multiple folded ladder sections. Specifically, when the ladder body is folded, the lock body is located above and in the center of the ladder section furthest from the mounting frame, and a plug-in structure corresponding to the lock body's pin is located in the middle of this ladder section. This ensures that when the lock body's pin is inserted into the plug-in structure, the ladder section experiences uniform force, allowing for better fit between the ladder section furthest from the mounting frame and adjacent ladder sections. Therefore, it reduces the likelihood of collisions and noise between the ladder section furthest from the mounting frame and adjacent ladder sections, improving the user experience.

[0024] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0025] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0026] Figure 1 This is a schematic structural diagram of the ladder assembly according to an embodiment of the present utility model;

[0027] Figure 2 This is a schematic structural diagram of the ladder assembly according to an embodiment of the present utility model;

[0028] Figure 3 This is a schematic structural diagram of the ladder assembly according to an embodiment of the present utility model;

[0029] Figure 4 This is a schematic structural diagram of the ladder assembly according to an embodiment of the present utility model;

[0030] Figure 5 yes Figure 3 A magnified schematic diagram of the structure at point A in the middle;

[0031] Figure 6 This is a schematic structural diagram of the ladder assembly according to an embodiment of the present utility model;

[0032] Figure 7 yes Figure 6 A magnified schematic diagram of the structure at point B in the middle;

[0033] Figure 8 This is a schematic structural diagram of the roof platform device according to an embodiment of the present utility model.

[0034] Figure label:

[0035] Ladder assembly 10;

[0036] Mounting bracket 100; receiving cavity 101; third permanent magnet 102; first protrusion 110; first permanent magnet 111; second protrusion 120; second permanent magnet 121; frame 130; first housing 140; second housing 150;

[0037] 200 ladder body; 201 ladder section; 210 upper ladder section; 220 lower ladder section; 221 crossbar; 222 plug-in structure; 223 first vertical bar; 224 guide rib; 225 second vertical bar; 226 first mating groove; 227 third vertical bar;

[0038] Lock body 300;

[0039] Platform Component 20. Detailed Implementation

[0040] The following reference Figures 1 to 8 This invention describes a ladder assembly and a roof platform device having the same, according to embodiments of the present invention. In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0041] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being 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," or "below" of the second feature can mean the first feature is 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.

[0043] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The ladder assembly 10 of this utility model embodiment is described below with reference to the accompanying drawings.

[0045] like Figures 1-7 As shown, the ladder assembly 10 of this utility model embodiment includes a mounting bracket 100, a ladder body 200, and a lock body 300.

[0046] Mounting bracket 100 is used to connect the longitudinal rails and / or platform assembly 20 on the top of the vehicle, and ladder 200 is connected to mounting bracket 100. Ladder 200 includes at least two ladder sections 201 that are folded together to allow ladder 200 to be folded or unfolded.

[0047] When the ladder body 200 is in the folded state, multiple ladder sections 201 are folded sequentially towards the side away from the mounting bracket 100. Among them, the ladder section 201 closest to the mounting bracket 100 is connected to the mounting bracket 100. When the ladder body 200 is in the unfolded state, multiple ladder sections 201 are connected sequentially in the vertical direction, and the top of each ladder section 201 is connected to the bottom of the ladder section 201 above it.

[0048] A lock body 300 is mounted on the mounting bracket 100. The lock body 300 includes a vertically movable pin. The ladder section 201 furthest from the mounting bracket 100 is provided with a corresponding insertion structure 222. When the ladder section 200 is in a folded state, the pin can be inserted into the insertion structure 222 to restrict the ladder section 200 from unfolding. The insertion structure 222 is located at the middle of the ladder section 201 furthest from the mounting bracket 100, and the lock body 300 is located above and in the center of the ladder section 201 furthest from the mounting bracket 100.

[0049] In other words, such as Figure 2 As shown, when the ladder body 200 is in the folded state, the lock body 300 is located above the ladder section 201 furthest from the mounting bracket 100, and the lock body 300 corresponds to the middle of that ladder section 201. The pin of the lock body 300 engages with the insertion structure 222 located in the middle of the ladder section 201 furthest from the mounting bracket 100. This locks the ladder section 201 furthest from the mounting bracket 100, ensuring that the ladder body 200 remains in the folded state.

[0050] Compared with the prior art, the ladder assembly 10 of this utility model embodiment includes a mounting frame 100, a ladder body 200 connected to the mounting frame 100, and a locking body 300. The ladder body 200 includes a plurality of folded ladder sections 201. The locking body 300 can lock the ladder section 201 furthest from the mounting frame 100 among the plurality of folded ladder sections 201. In the folded state of the ladder body 200, the lock body 300 is located above and in the center of the ladder section 201 furthest from the mounting bracket 100. The insertion structure 222 corresponding to the pin of the lock body 300 is located in the middle of the ladder section 201. This ensures that when the pin of the lock body 300 is inserted into the insertion structure 222, the ladder section 201 is subjected to uniform force, allowing the ladder section 201 furthest from the mounting bracket 100 to fit better with the adjacent ladder sections 201. Therefore, the ladder section 201 furthest from the mounting bracket 100 is less likely to collide with the adjacent ladder sections 201 and produce abnormal noise, thus improving the user experience.

[0051] In some embodiments, such as Figures 1-4 As shown, the lock body 300 is a combination lock, and the lock body 300 is configured to be unlocked by entering the corresponding password, so that the bolt disengages from the plugging structure 222.

[0052] Understandably, locking the ladder 200 with the lock body 300 not only ensures that the ladder 200 is in a folded state, but also guarantees security because only the user can open the lock body 300 to release its locking effect. However, the lock body 300, which requires a key to open, necessitates that the user always carry the corresponding key, causing inconvenience. To solve this problem, the lock body 300 in this embodiment is a combination lock, which allows the lock body 300 to be opened without a key; the user only needs to enter the corresponding password, thus improving the convenience of using the lock body 300.

[0053] In some embodiments, the ladder sections 201 are magnetically connected to ensure that they are relatively locked together after the ladder body 200 is folded. This ensures that the ladder sections 201 fit tightly together, preventing them from colliding and causing noise.

[0054] Specifically, each step 201 has a permanent magnet at its upper and lower parts, and each step 201 is made of a magnetically conductive material, for example, each step 201 is made of iron.

[0055] In some embodiments, such as Figure 7 As shown, the plug-in structure 222 is an inwardly recessed groove. In this embodiment, after the ladder body 200 is folded, the opening of the groove is open upward, so that it can cooperate with the pin of the lock body 300.

[0056] In some embodiments, such as Figure 3 and Figure 4 As shown, the mounting bracket 100 defines a receiving cavity 101. When the ladder body 200 is in a folded state, all ladder sections 201 are sequentially housed within the receiving cavity 101 from the inside out. The ladder body 200 includes an upper ladder section 210, a lower ladder section 220, a second vertical bar 225, and a third vertical bar 227. The upper ladder section 210 is connected within the receiving cavity 101. The lower ladder section 220 is hinged to the bottom of the upper ladder section 210. The lower ladder section 220 includes two first vertical bars 223 connected by multiple crossbars 221. The second vertical bar 225 is retractably connected to one of the first vertical bars 223, and the third vertical bar 227 is retractably connected to the other first vertical bar 223. In other words, the second vertical bar 225 and its corresponding first vertical bar 223 are height-adjustable, and the third vertical bar 227 and its corresponding first vertical bar 223 are also height-adjustable; that is, the height of the second vertical bar 225 and the third vertical bar 227 relative to their respective first vertical bars 223 can be adjusted independently.

[0057] When users are out and about, vehicles often park on uneven surfaces. In such cases, when using the ladder assembly 10, the two vertical bars of the bottom ladder section 201 cannot simultaneously contact the ground. This not only results in poor support for the ladder section 201, leading to reduced safety of the ladder assembly 10, but also causes damage to the connection between the two vertical bars and the bottom ladder section 201 due to uneven stress, thus reducing the service life of the ladder assembly 10.

[0058] In this embodiment, the second vertical rod 225 and the third vertical rod 227 are respectively pulled and connected to the two first vertical rods 223 of the lower ladder section 220. This allows for independent adjustment of the height of the second vertical rod 225 and the third vertical rod 227 relative to their corresponding first vertical rods 223 when the road surface is uneven. This ensures that both the second vertical rod 225 and the third vertical rod 227 of the lower ladder section 220 can contact the ground, resulting in uniform force distribution on the lower ladder section 220. This not only guarantees the service life of the ladder assembly 10 in this embodiment but also extends its service life.

[0059] In some embodiments, such as Figure 5 As shown, each first vertical rod 223 defines a vertically extending guide cavity. A vertically extending guide rib 224 is provided on the inner wall of the guide cavity. A second vertical rod 225 is movably disposed within the guide cavity of one of the first vertical rods 223 in the vertical direction. The second vertical rod 225 is provided with a vertically extending first mating groove 226, and the guide rib 224 of one of the first vertical rods 223 is disposed in the first mating groove 226. A third vertical rod 227 is movably disposed within the guide cavity of another first vertical rod 223 in the vertical direction. The third vertical rod 227 is provided with a vertically extending second mating groove, and the guide rib 224 of the other first vertical rod 223 is disposed in the second mating groove.

[0060] In other words, each first vertical rod 223 is hollow inside and defines a guide cavity extending vertically, allowing at least a portion of the second vertical rod 225 and the third vertical rod 227 to be housed within the corresponding first vertical rod 223. This enables height adjustment of the second vertical rod 225 and the third vertical rod 227 relative to the corresponding first vertical rod 223, resulting in a simple structure. Furthermore, the first and second mating grooves engage with the corresponding guide ribs 224 to limit and guide the second vertical rod 225 and the third vertical rod 227 respectively. This not only ensures smooth lifting and lowering of the second vertical rod 225 and the third vertical rod 227 but also prevents them from swaying relative to the first vertical rod 223, ensuring the stability of the ladder assembly 10 and protecting user safety. In addition, the guide ribs 224 inside the first vertical rod 223 strengthen its structural strength, making it less prone to bending.

[0061] Furthermore, a first vertical rod 223 is provided with multiple first through holes, which are spaced apart in the vertical direction. The second vertical rod 225 is provided with a first insertion hole corresponding to the first through hole. The ladder assembly 10 also includes a first connector, which is sequentially inserted into one of the multiple first through holes and into the first insertion hole. That is, after the height of the second vertical rod 225 relative to its corresponding first vertical rod 223 is adjusted, the second vertical rod 225 and the first vertical rod 223 are fixed by inserting the first connector into the first insertion hole and the corresponding first through hole. The structure is simple and the manufacturing cost is low.

[0062] Another first vertical rod 223 is provided with multiple second through holes, which are spaced apart in the vertical direction. A third vertical rod 227 is provided with second insertion holes corresponding to the second through holes. The ladder assembly 10 also includes a second connector, which is sequentially inserted into one of the multiple second through holes and into the second insertion hole. That is, after the height of the third vertical rod 227 relative to its corresponding first vertical rod 223 is adjusted, the third vertical rod 227 and the first vertical rod 223 are fixed by inserting the second connector into the second insertion hole and the corresponding second through hole. The structure is simple and the manufacturing cost is low.

[0063] In some embodiments, such as Figure 3 As shown, the ladder body 200 also includes a rocker arm, one end of which is connected to the wall of the receiving cavity and the other end is connected to the upper ladder section 210. There are at least two rocker arms, so that the at least two rocker arms, the upper ladder section 210, and the mounting bracket 100 form a four-bar linkage mechanism.

[0064] In other embodiments, the top of the upper ladder section 210 is hinged to the mounting bracket 100.

[0065] In some embodiments, such as Figure 3 and Figure 4 As shown, the top of the receiving cavity is provided with a first protrusion 110 and a second protrusion 120. The first protrusion 110 and the second protrusion 120 are configured such that when the ladder body 200 is in the folded state, the two first vertical rods 223 respectively contact and abut against the first protrusion 110 and the second protrusion 120. Thus, the first protrusion 110 and the second protrusion 120 respectively restrict the two first vertical rods 223, thereby further preventing the lower ladder section 220 from shaking when the vehicle is bumpy.

[0066] Furthermore, such as Figure 3 and Figure 4As shown, a first permanent magnet 111 is provided on the first protrusion 110 so that the first protrusion 110 is magnetically connected to a first vertical rod 223. A second permanent magnet 121 is provided on the second protrusion 120 so that the second protrusion 120 is magnetically connected to another first vertical rod 223. When the ladder body 200 of this embodiment is in a folded state, the two first vertical rods 223 of the lower ladder section 220 are magnetically connected to the first protrusion 110 and the second protrusion 120 respectively through the first permanent magnet 111 and the second permanent magnet 121, so that the lower ladder section 220 fits more tightly against the first protrusion 110 and the second protrusion 120, thereby further preventing the lower ladder section 220 from shaking, improving the stability of the ladder assembly 10 when stored, and preventing the ladder section 201 inside the ladder assembly 10 from shaking and producing abnormal noise.

[0067] In some embodiments, such as Figure 3 and Figure 4 As shown, at least one third permanent magnet 102 is provided at the bottom of the receiving cavity so that when the ladder body 200 is in the folded state, the upper ladder section 210 is magnetically connected to the receiving cavity. When the ladder body 200 of this embodiment is in the folded state, the upper ladder section 210 is magnetically connected to the bottom of the receiving cavity through the third permanent magnet 102, so that the upper ladder section 210 fits more tightly against the bottom of the receiving cavity, thereby further preventing the upper ladder section 210 from shaking, further improving the stability of the ladder assembly 10 during storage, and preventing the ladder sections 201 inside the ladder assembly 10 from shaking and producing abnormal noise.

[0068] Specifically, there are two third permanent magnets 102, which are spaced apart. In this embodiment, when the ladder 200 is in a folded state, the two third permanent magnets 102 are magnetically connected to the two vertical rods of the upper ladder section 210.

[0069] In some embodiments, such as Figure 1 and Figure 2 As shown, the mounting bracket 100 includes a frame 130, a first housing 140, and a second housing 150. The first housing 140 covers the frame 130 and defines a receiving cavity 101. The second housing 150 is disposed on the first housing 140 and is located on the front and / or rear of the receiving cavity 101. The second housing 150 is fixedly connected to the first housing 140 by fastening structures extending laterally. The first housing 140 and the second housing 150 are interlocked with each other in a convex-concave fit structure.

[0070] The first housing 140 encloses the ladder body 200, reducing wind resistance during vehicle movement and protecting it. The second housing 150 is a separate structure from the first housing 140. Compared to a one-piece structure, the individual components of the separate structure are smaller, simplifying the molding process of both housings. Furthermore, the ease of molding the separate housings 140 and 150 makes it easier to increase their structural strength, thereby improving the structural strength of both housings while controlling costs and enhancing the user experience. In addition, the increased structural strength of the first and second housings 140 and 150 reduces the likelihood of damage to the top sides of the mounting bracket 100, further improving the user experience.

[0071] In some embodiments, the frame 130 is provided with at least one fourth permanent magnet, so that the frame 130 can be magnetically connected to the longitudinal rail and / or platform assembly 20 on the vehicle roof via the fourth permanent magnet. Thus, by using at least one fourth permanent magnet, the frame 130 is magnetically mounted on the longitudinal rail and / or platform assembly 20 on the vehicle roof, greatly improving the ease of installation of the ladder assembly 10 in this embodiment and enhancing the user experience.

[0072] The roof platform device of this utility model according to the following description is with reference to the accompanying drawings.

[0073] like Figure 8 As shown, the roof platform device of this utility model embodiment includes a platform assembly 20 and a ladder assembly 10. The platform assembly 20 is configured to be connected to the top of the vehicle. The ladder assembly 10 is the ladder assembly 10 of any of the above embodiments, and the ladder assembly 10 is connected to the platform assembly 20 via a mounting bracket 100.

[0074] The roof platform device of this utility model embodiment includes a ladder assembly 10 comprising a mounting frame 100, a ladder body 200 connected to the mounting frame 100, and a locking body 300. The ladder body 200 includes multiple folded ladder sections 201. When the ladder body 200 of the ladder assembly 10 is in a folded state, and the pin of the locking body 300 is inserted into the insertion structure 222, the locking body 300 can ensure that the ladder section 201 furthest from the mounting frame 100 is subjected to uniform force on both sides, allowing the ladder section 201 furthest from the mounting frame 100 to fit better with the adjacent ladder sections 201. Consequently, the ladder section 201 furthest from the mounting frame 101 is less likely to collide with the adjacent ladder sections 201, thus reducing the likelihood of abnormal noise. This results in a better user experience.

[0075] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A ladder assembly, characterized in that, include: Mounting bracket for connecting longitudinal rails and / or platform components on the top of the vehicle; A ladder body connected to the mounting bracket; the ladder body includes at least two folded sections connected together so that the ladder body can be folded or unfolded. A lock body is disposed on the mounting bracket; the lock body includes a vertically movable pin, and the ladder section furthest from the mounting bracket is provided with a plug-in structure corresponding to the pin; when the ladder body is in a folded state, the pin can be inserted into the plug-in structure to restrict the ladder body from unfolding; wherein, the plug-in structure is located at the middle position of the ladder section furthest from the mounting bracket, and the lock body is located above and in the center of the ladder section furthest from the mounting bracket.

2. The ladder assembly according to claim 1, characterized in that, The lock body is a combination lock, configured to unlock the lock body by entering the corresponding password, so that the pin disengages from the plugging structure.

3. The ladder assembly according to claim 1, characterized in that, The mounting bracket defines a receiving cavity; when the ladder body is in a folded state, all the ladder sections are sequentially received in the receiving cavity from the inside to the outside; The ladder body includes: Upper ladder section, the upper ladder section being connected within the receiving cavity; The lower ladder section is hinged to the bottom of the upper ladder section; the lower ladder section includes two first vertical bars connected by a plurality of horizontal bars; The second vertical rod is connected to one of the first vertical rods by a pull-out mechanism; The third vertical rod is pulled and connected to another first vertical rod.

4. The ladder assembly according to claim 3, characterized in that, The top of the receiving cavity is provided with a first protrusion and a second protrusion. The first protrusion and the second protrusion are configured such that when the ladder is in a folded state, the two first vertical rods respectively contact and abut against the first protrusion and the second protrusion. And / or, A first permanent magnet is provided on the first protrusion so that the first protrusion is magnetically connected to one of the first vertical rods; a second permanent magnet is provided on the second protrusion so that the second protrusion is magnetically connected to another of the first vertical rods. And / or, At least one third permanent magnet is provided at the bottom of the receiving cavity so that when the ladder is in a folded state, the upper ladder section is magnetically connected to the receiving cavity.

5. The ladder assembly according to claim 3, characterized in that, Each of the first vertical rods defines a guide cavity that extends vertically; the inner wall of the guide cavity is provided with guide ribs that extend vertically. The second vertical rod is movably disposed within a guide cavity of the first vertical rod in the vertical direction; the second vertical rod is provided with a first mating groove extending vertically, and a guide rib of the first vertical rod is disposed in the first mating groove; The third vertical rod is movably disposed within the guide cavity of the other first vertical rod in the vertical direction; the third vertical rod is provided with a second mating groove extending vertically, and the guide rib of the other first vertical rod is disposed in the second mating groove.

6. The ladder assembly according to claim 3, characterized in that, The first vertical rod is provided with a plurality of first through holes, which are spaced apart in the vertical direction; the second vertical rod is provided with a first insertion hole corresponding to the first through hole; the ladder assembly further includes a first plug-in member, which is sequentially plugged into one of the plurality of first through holes and into the first insertion hole; Another first vertical rod is provided with a plurality of second through holes, which are spaced apart in the vertical direction; the third vertical rod is provided with a second insertion hole corresponding to the second through hole; the ladder assembly also includes a second plug-in member, which is sequentially inserted into one of the plurality of second through holes and the second insertion hole.

7. The ladder assembly according to claim 3, characterized in that, Each of the ladder sections is magnetically connected to ensure that the sections are locked relative to each other after the ladder body is folded.

8. The ladder assembly according to claim 3, characterized in that, The mounting bracket includes: Frame; A first housing covers the frame; the first housing defines the receiving cavity; The second housing is disposed on the first housing and is located at the front and / or rear of the receiving cavity, and the second housing is fixedly connected to the first housing by fastening structures extending to the left and right; the first housing and the second housing are fitted together with a concave-convex fitting structure.

9. The ladder assembly according to claim 8, characterized in that, The frame is provided with at least one fourth permanent magnet so that the frame can be magnetically connected to the longitudinal rails and / or platform components on the top of the vehicle via the fourth permanent magnet.

10. A rooftop platform device, characterized in that, include: A platform component configured to be connected to the top of the vehicle; The ladder assembly as described in any one of claims 1 to 9 is connected to the platform assembly via a mounting bracket.

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