Extension ladder

Abstract

The telescopic ladder comprises a ladder body, a tool box and two connecting assemblies, the ladder body is of a telescopic folding structure, a containing space is formed in the ladder body, the tool box is rotationally connected with the top of the ladder body, a box body cavity with an opening in one end is formed in the tool box, and the two connecting assemblies are oppositely arranged in the extending direction of a transverse support of the ladder body at intervals; the connecting assembly comprises a limiting piece, an adjusting rod and a fixing piece, the limiting piece is arranged on the ladder body, one end of the adjusting rod is hinged to the tool box, the other end of the adjusting rod is movably connected with the limiting piece, the adjusting rod has a locking state and a containing state, and the fixing piece is used for fixing the limiting piece and the adjusting rod so that the adjusting rod can be kept in the locking state or the containing state. The adjusting rod and the stand column extend in the same direction, and the tool box is contained in the containing space. In the locking state, the adjusting rod and the stand column of the ladder body form an included angle, the tool box leaves the containing space, the opening of the box body cavity faces upwards, and the telescopic ladder is convenient to carry and can be used for containing tools needed by climbing operation.

Description

Technical Field

[0001] The present application relates to the technical field of electric climbing tools, and in particular to a telescopic ladder. Background Art

[0002] During power maintenance or construction, since power equipment is generally located at high places, such as on utility poles and buildings, ladders are needed to assist in daily power distribution network production operations, especially in the installation and maintenance of electricity metering devices.

[0003] However, the commonly used ladder structure not only has the problem of being too large and difficult to carry, but also has the problem of being difficult to carry tools due to its single structure, which is not conducive to improving the efficiency of climbing operations. Summary of the invention

[0004] Based on this, it is necessary to provide a telescopic ladder that can be conveniently carried on site and can hold the tools required for high-altitude operations in order to solve the above problems.

[0005] The technical solution is as follows:

[0006] A telescopic ladder, comprising:

[0007] A ladder body, the ladder body comprising two uprights, a plurality of cross braces and a plurality of locking assemblies, the two uprights being arranged opposite to each other, each of the uprights comprising a plurality of telescopic columns which are sleeved and connected step by step, the two connected telescopic columns being able to slide relative to each other, and having an expanded state and a retracted state in which the two telescopic columns are relatively extended, the cross braces being connected one by one between the two corresponding telescopic columns of the two uprights, and locking assemblies being provided at both ends of each of the cross braces, the locking assemblies having a locked state and an unlocked state, in the locked state, the locking assemblies being able to lock the two connected telescopic columns so that the two connected telescopic columns are maintained in the expanded state, and in the unlocked state, the two connected telescopic columns being able to switch between the expanded state and the retracted state, the cross brace located at the uppermost end of the ladder body among the plurality of cross braces being a first cross brace, and the remaining cross braces being second cross braces; the two telescopic columns located at the uppermost ends of the uprights being maintained in the expanded state, so that an accommodation space is formed between the first cross brace and the second cross brace adjacent to it;

[0008] A tool box, the tool box is rotatably connected to the first cross brace, and the tool box forms a box body cavity with an open end;

[0009] Two connecting components, the two connecting components are arranged opposite to each other at intervals along the extension direction of the cross brace, each of the connecting components comprises a limiter, an adjusting rod and a fixing member, the limiter is arranged on any second cross brace, the adjusting rod is hinged to the tool box, the adjusting rod and the limiter are movably connected, the adjusting rod has a locked state and a received state, the adjusting rod can switch between the locked state and the received state by moving relative to the limiter, and the fixing member is used to fix the limiter and the adjusting rod so that the adjusting rod is maintained in the locked state or the received state;

[0010] Among them, in the accommodation state, the extension direction of the adjustment rod is consistent with that of the column, and the tool box is accommodated in the accommodating space. In the locked state, the adjustment rod and the column are set at an angle, the tool box leaves the accommodating space, and the opening of the box body cavity faces upward.

[0011] In the above telescopic ladder, since the upright column is composed of a plurality of telescopic columns that can be slidably sleeved in sequence, the cross brace is connected between the corresponding two telescopic columns of the two upright columns one by one, and the locking assembly can lock the two connected telescopic columns in the unfolded state in the locked state, and can release the lock between the two connected telescopic columns in the unlocked state so that the two connected telescopic columns can slide relative to each other, the ladder body of the telescopic ladder is a telescopic structure, which enables the ladder body to change its external dimensions by sliding the two connected telescopic columns relative to each other, so that the telescopic ladder can increase its volume to assist the user in climbing operations, and can also reduce its volume for the convenience of carrying by the user. Since a tool box is provided at the top of the ladder body, before the climbing operation, the tools can be placed in the tool box, so that when the volume of the ladder body is adjusted for the climbing operation, the tool box and the tools in the tool box can rise with the unfolding of the ladder body, so that the user can take and place the tools during the operation, thereby eliminating the need for manual transfer of tools or manual back-spanning of tools, reducing the risk of tools falling and improving the operation efficiency. Among them, when the adjustment rod is in the locked state, the tool box can be supported by the adjustment rod to maintain the first fixed posture with the opening of the box body cavity facing upwards, and when the adjustment rod is in the accommodated state, the tool box can be maintained in the second fixed posture accommodated in the accommodating space. When the adjustment rod moves relative to the limiter, the tool box can rotate relative to the ladder body to switch between the first fixed posture and the second fixed posture. This allows the adjustment rod to be locked to the locked state during the climbing operation, so that the user can place the tool in the tool box, and then the tool can rise or fall with the volume change of the ladder body; and when moving the telescopic ladder, the adjustment rod can be locked to the accommodated state, so that the tool box can be folded with the ladder body, thereby reducing the volume of the telescopic ladder, so as to achieve the effect of convenient carrying. Therefore, the telescopic ladder can be conveniently carried on site and can be used to place the tools required for the climbing operation, effectively improving the efficiency of the climbing operation.

[0012] The technical solution is further described below:

[0013] In one embodiment, a connecting sleeve is sleeved on the outer circumference of each telescopic column, and each telescopic column is connected to the corresponding cross brace through the connecting sleeve.

[0014] In one embodiment, a positioning hole is provided on the surface of each telescopic column, and the two connected telescopic columns are respectively a first telescopic column and a second telescopic column, the first telescopic column is sleeved on the outer circumference of the second telescopic column, both ends of each cross brace are provided with mounting holes extending along the extending direction of the cross brace, and the side wall of each mounting hole is provided with a sliding hole, and each locking assembly includes a positioning member, a driving member and an elastic member, the elastic member is provided in the corresponding mounting hole, and the positioning member and the driving member can be movably provided in the corresponding mounting hole, one end of the elastic member is connected to the inner wall of the corresponding mounting hole, and the other end is connected to the positioning member, one end of the driving member is connected to the positioning member, and the other end passes through the corresponding mounting hole through the corresponding sliding hole, in the locked state, one end of the positioning member away from the elastic member can be inserted into the positioning hole of the corresponding second telescopic column under the action of the elastic member, in the unlocked state, the positioning member can be withdrawn from the positioning hole of the corresponding second telescopic column, and the driving member can move along the corresponding sliding hole to drive the locking assembly to switch from the locked state to the unlocked state.

[0015] In one embodiment, there are two ladder bodies, the two ladder bodies are arranged opposite to each other, and the top ends of the two ladder bodies are hinged, and the tool box and the two connecting components are arranged on one of the two ladder bodies.

[0016] In one embodiment, a strut is provided between the two ladder bodies, and the strut includes at least two support rods hinged in sequence, one of the two support rods located at opposite ends of the at least two support rods is hinged to one of the two ladder bodies, and the other of the two support rods located at opposite ends of the at least two support rods is hinged to the other of the two ladder bodies, and the strut can be folded or unfolded when the two ladder bodies rotate relative to each other.

[0017] In one embodiment, each of the limiting members includes a sleeve portion, a first extension portion and a second extension portion, the sleeve portion is sleeved on the corresponding second cross brace, the first extension portion and the second extension portion are arranged opposite to each other at an interval and are both connected to the sleeve portion, a sliding member is provided on the side of the first extension portion opposite to the second extension portion, the adjusting rod is arranged between the first extension portion and the second extension portion, a sliding groove extending along the extending direction of the adjusting rod is provided on the surface of the adjusting rod, the sliding groove has a first locking end and a second locking end opposite to each other, the first locking end is located on the side of the second locking end away from the tool box, the sliding member is movably arranged in the sliding groove, in the locked state, the sliding member is arranged at the first locking end, and in the accommodated state, the sliding member is arranged at the second locking end, the adjusting rod can switch between the locked state and the accommodated state by moving relative to the sliding member, and the fixing member is used to fix the sliding member and the adjusting rod so that the adjusting rod is maintained in the locked state or the accommodated state.

[0018] In one embodiment, a first fixing hole is formed at the bottom of the groove of the first locking end, and a second fixing hole is formed at the bottom of the groove of the second locking end. The fixing member includes a head and a rod connected to the head, and the head is arranged on a side of the first extension portion away from the second extension portion. In the locked state, the end of the rod away from the head passes through the first extension portion, the sliding member and the first fixing hole and is detachably connected to the second extension portion. In the accommodated state, the end of the rod away from the head passes through the first extension portion, the sliding member and the second fixing hole and is detachably connected to the second extension portion.

[0019] In one embodiment, the tool box includes a box body, a tray, a cover body and two rotating rods, the box body is hinged to the first cross brace and the adjusting rod, the box body cavity is formed in the box body, the cover body cooperates with the box body in opening and closing, and the cover body is locked with the box body through a locking assembly, the two rotating rods are relatively arranged on both sides of the tray, one end of the two rotating rods is rotatably connected to the tray, and the other ends of the two rotating rods are connected to the side wall of the box body cavity, the tray matches the shape of the box body cavity, and in the locked state, the tool box has a closed state and an open state, in the closed state, the tray is accommodated in the box body cavity, and in the open state, the cover body opens the box body cavity, and the tray leaves the box body cavity and is arranged on the cover body.

[0020] In one embodiment, the locking assembly includes a first matching portion and a second matching portion that is locked with the first matching portion, the first matching portion is arranged on the box body, and the second matching portion is arranged on the cover body.

[0021] In one embodiment, the ladder body is made of fiberglass;

[0022] And / or, the bottom end of each column is provided with an anti-slip sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a schematic structural diagram of a telescopic ladder in an embodiment in a folded state.

[0024] FIG. 2 is a schematic structural diagram of a telescopic ladder in an embodiment in a stretched state.

[0025] Figure 3 It is a partial cross-sectional structural schematic diagram of a locking assembly in an embodiment in a locked state.

[0026] Figure 4 It is a schematic diagram of the local enlarged structure of point A in the structure shown in Figure 2.

[0027] Figure 5 It is a schematic diagram of a partially enlarged structure of the structure at point B in the structure shown in FIG2 in a certain state.

[0028] Figure 6 for Figure 5 A schematic diagram of the structure shown in another state.

[0029] Description of reference numerals:

[0030] 100, telescopic ladder; 10, ladder body; 1, column; 11, telescopic column; 111, first telescopic column; 112, second telescopic column; 12, connecting sleeve; 13, support rod; 131, support rod; 14, cross brace; 14a, mounting hole; 14b, sliding hole; 141, first cross brace; 142, second cross brace; 1a, accommodating space; 2, tool box; 21, cover; 22, tray; 221, partition; 221a, placement cavity; 23, box body; 2a, box body cavity; 24, lock assembly; 2 42. First matching part; 241. Second matching part; 25. Rotating rod; 3. Connecting assembly; 31. Limiting member; 311. Socket joint; 312. Second extension part; 313. First extension part; 32. Fixing member; 321. Head; 322. Rod; 33. Adjusting rod; 331. Slide groove; 331a. First locking end; 331b. Second locking end; 331c. Second fixing hole; 4. Anti-slip sleeve; 5. Locking assembly; 51. Elastic member; 52. Driving member; 53. Positioning member. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0037] See Figures 1 to Figure 6 , a telescopic ladder 100 provided in one embodiment of the present application includes a ladder body 10, a tool box 2 and two connecting components 3. Among them,

[0038] The ladder body 10 includes two columns 1, a plurality of cross braces 14 and a plurality of locking assemblies 5. The two columns 1 are arranged opposite to each other. Each column 1 includes a plurality of telescopic columns 11 which are sleeved step by step. The two connected telescopic columns 11 can slide relative to each other and have a relatively extended expanded state and a retracted state. The cross braces 14 are connected one by one between the two corresponding telescopic columns 11 in the two columns 1. The two ends of each cross brace 14 are provided with a locking assembly 5. The locking assembly 5 has a locked state and an unlocked state. In the locked state, the locking assembly 5 can lock the two connected telescopic columns 11 so that the two connected telescopic columns 11 are maintained in the expanded state. In the unlocked state, the two connected telescopic columns 11 can switch between the expanded state and the retracted state. The cross brace 14 located at the uppermost end of the ladder body 10 among the plurality of cross braces 14 is a first cross brace 141, and the remaining cross braces 14 are all second cross braces 142. The two uppermost telescopic columns 11 in the column 1 are maintained in the expanded state so that an accommodation space 1a is formed between the first cross brace 141 and the second cross brace 142 adjacent to it. The tool box 2 is rotatably connected to the first cross brace 141, and the tool box 2 forms a box body cavity 2a with an opening at one end. Two connecting components 3 are arranged relative to each other at intervals along the extension direction of the cross brace 14, and each connecting component 3 includes a limiter 31, an adjusting rod 33 and a fixing component 32. The limiter 31 is arranged on any second cross brace 142, and the adjusting rod 33 is hinged with the tool box 2. The adjusting rod 33 and the limiter 31 are movably connected. The adjusting rod 33 has a locking state and a receiving state. The adjusting rod 33 can switch between the locking state and the receiving state by moving relative to the limiter 31. The fixing component 32 is used to fix the limiter 31 and the adjusting rod 33, so that the adjusting rod 33 is maintained in the locking state or the receiving state. In the receiving state, the extending direction of the adjusting rod 33 is consistent with that of the column 1, and the tool box 2 is received in the accommodating space 1a. In the locked state, the adjusting rod 33 is arranged at an angle with the column 1, the tool box 2 leaves the accommodating space, and the opening of the box body cavity 2a faces upward.

[0039] In the above-mentioned telescopic ladder 100, since the column 1 is composed of a plurality of telescopic columns 11 that can be slidably connected in sequence, the cross brace 14 is connected one by one between the corresponding two telescopic columns 11 of the two columns 1, and the locking assembly 5 can lock the two connected telescopic columns 11 in the expanded state in the locked state, and can release the lock between the two connected telescopic columns 11 in the unlocked state so that the two connected telescopic columns 11 can slide relative to each other, so the ladder body 10 of the telescopic ladder 100 is a telescopic structure, which allows the ladder body 10 to change its outer dimensions by relatively sliding the two connected telescopic columns 11, so that the telescopic ladder 100 can increase its volume to assist users in climbing operations, and can also reduce its volume for users to carry. Since a tool box 2 is provided at the top of the ladder body 10, tools can be placed in the tool box 2 before climbing operations. When the volume of the ladder body 10 is adjusted for climbing operations, the tool box 2 and the tools in the tool box 2 can rise with the unfolding of the ladder body 10, so that the user can take and place tools during the operation, thereby eliminating the need for manual transfer of tools or manual carrying of tools on the back, reducing the risk of tools falling and improving operation efficiency. Among them, when the adjusting rod 33 is in the locked state, the tool box 2 can be supported by the adjusting rod 33 to maintain the first fixed posture with the opening of the box body cavity 2a facing upwards, and when the adjusting rod 33 is in the receiving state, the tool box 2 can be maintained in the second fixed posture received in the accommodating space 1a. When the adjusting rod 33 moves relative to the limiter 31, the tool box 2 can rotate relative to the ladder body 10 to switch between the first fixed posture and the second fixed posture. This allows the adjusting rod 33 to be locked to the locked state during the climbing operation, so that the user can place the tools in the tool box 2, and then the tools can rise or fall with the volume change of the ladder body 10; and when the telescopic ladder 100 is moved, the adjusting rod 33 can be locked to the receiving state, so that the tool box 2 can be folded with the ladder body 10, so as to reduce the volume of the telescopic ladder 100, so as to achieve the effect of convenient carrying. Therefore, the telescopic ladder 100 can be conveniently carried on site and can be placed with the tools required for the climbing operation, which effectively improves the efficiency of the climbing operation.

[0040] Among them, in the locked state, the locking assembly 5 can lock the two connected telescopic columns 11 so that the two connected telescopic columns 11 are maintained in the expanded state, which means that in the same column 1, when the two connected telescopic columns 11 are in the expanded state, the two telescopic columns 11 can be locked by the locking assembly 5.

[0041] Schematically, the outer diameters of the multiple telescopic columns 11 which are arranged step by step are gradually reduced. In this way, two adjacent telescopic columns can be moved conveniently.

[0042] Specifically, as shown in FIG. 2 , there is a first spacing between the hinged position of the adjustment rod 33 and the tool box 2 and the hinged position of the tool box 2 and the first cross brace 141. Thus, in the locked state, the first cross brace 141, the second cross brace 142 corresponding to the stopper 31, the adjustment rod 33 and the tool box 2 can form a triangular structure, so that the adjustment rod 33 can reliably support the tool box 2 and ensure that the tool box 2 can maintain the first fixed posture with the opening of the box body cavity 2a facing upward. Schematically, the stopper 31 is connected to the second cross brace 142 adjacent to the first cross brace 141.

[0043] Schematically, as shown in FIG. 2 , in the locked state, the extending direction of the line connecting the hinge position of the adjustment rod 33 and the tool box 2 and the hinge position of the tool box 2 and the first cross brace 141 is perpendicular to the extending direction of the first cross brace 141, so that when the tool box 2 is in the first fixed posture, the opening of the box body cavity 2a can maintain a horizontal state, thereby ensuring that the tools in the tool box 2 will not fall off the tool box 2. When the tool box 2 is in the second fixed posture, the tool box 2 can be better accommodated in the accommodating space 1a, so as to effectively reduce the volume of the telescopic ladder 100.

[0044] Optionally, as shown in FIG2 , the first cross brace 141 is hinged to the top of the tool box 2, and the adjustment rod 33 is hinged to the top of the tool box 2. In this way, when the tool box 2 switches from the first fixed posture to the second fixed posture, the tool box 2 can better accommodate the accommodating space 1a, so as to ensure that the volume of the telescopic ladder 100 can be effectively reduced in the accommodated state.

[0045] In one embodiment, the ladder body 10 is made of glass fiber reinforced plastic. Since glass fiber reinforced plastic has the characteristics of being light and hard, non-conductive, stable in performance, high in mechanical strength, and corrosion-resistant, when the ladder body 10 is made of glass fiber reinforced plastic, the ladder body 10 not only has good insulation performance, but also has the characteristics of being not prone to corrosion, which enables the telescopic ladder 100 to be used during power maintenance or construction. In addition, this can also effectively reduce the weight of the ladder body 10, so that the telescopic ladder 100 can be moved conveniently.

[0046] Illustratively, the tool box 2 is made of a material with insulating properties to ensure that the telescopic ladder 100 has good insulating properties and to ensure the safety of the user during electrical maintenance.

[0047] Optionally, as shown in Figures 1 and 2, the bottom end of each column 1 is covered with an anti-skid cover 4. In this way, when the telescopic ladder 100 is used, the anti-skid cover 4 can increase the friction between the telescopic ladder 100 and the ground, thereby preventing the telescopic ladder 100 from sliding relative to the ground during use, effectively ensuring the personal safety of the user.

[0048] In one embodiment, as shown in FIG. 1 , FIG. 2 and Figure 4As shown, a connecting sleeve 12 is sleeved on the outer circumference of each telescopic column 11, and each telescopic column 11 is connected to a corresponding cross brace 14 through the connecting sleeve 12. In this way, the cross brace 14 can be reliably connected to the corresponding telescopic column 11 through the connecting sleeve 12, so as to ensure that the user can use the ladder body 10 to perform climbing operations. In addition, when the connecting sleeve 12 is detachably sleeved on the telescopic column 11, the connecting sleeve 12 can also make the connection between the cross brace 14 and the corresponding telescopic column 11 a detachable connection, so that when the cross brace 14 is damaged, the cross brace 14 can be easily replaced.

[0049] In one embodiment, in combination with FIG. 1 to FIG. Figure 3As shown, a positioning hole is provided on the surface of each telescopic column 11, and the two connected telescopic columns 11 are respectively a first telescopic column 111 and a second telescopic column 112, and the first telescopic column 111 is sleeved on the outer periphery of the second telescopic column 112, and both ends of each cross brace 14 are provided with mounting holes 14a extending along the extension direction of the cross brace 14, and the side wall of each mounting hole 14a is provided with a sliding hole 14b, and each locking assembly 5 includes a positioning member 53, a driving member 52 and an elastic member 51, and the elastic member 51 is arranged in the corresponding mounting hole 14a, and the positioning member 53 and the driving member 52 can be movably arranged in the corresponding mounting hole 14a, One end of the elastic member 51 is connected to the inner wall of the corresponding mounting hole 14a, and the other end is connected to the positioning member 53. One end of the driving member 52 is connected to the positioning member 53, and the other end passes through the corresponding mounting hole 14a through the corresponding sliding hole 14b. In the locked state, the end of the positioning member 53 that is away from the elastic member 51 can be inserted into the positioning hole of the corresponding second telescopic column 112 under the action of the elastic member 51. In the unlocked state, the positioning member 53 can be withdrawn from the positioning hole of the corresponding second telescopic column 112, and the driving member 52 can move along the corresponding sliding hole 14b to drive the locking assembly 5 to switch from the locked state to the unlocked state. In this way, when the first telescopic column 111 and the second telescopic column 112 are in the retracted state, the end of the positioning member 53 that is away from the elastic member 51 can abut against the surface of the corresponding second telescopic column 112, so that the positioning member 53 can compress the elastic member 51, and then when the second telescopic column 112 slides outward relative to the first telescopic column 111 and switches from the retracted state to the extended state, the positioning member 53 can be automatically inserted into the corresponding positioning hole of the second telescopic column 112 under the elastic force of the elastic member 51, so that the first telescopic column 111 and the second telescopic column 112 can be maintained in the extended state, so that the ladder body 10 can assist the user in performing climbing operations. When the climbing operation is finished and the ladder body 10 needs to be folded, the driving member 52 only needs to be driven to move relative to the cross brace 14 toward the elastic member 51, so that the positioning member 53 can be withdrawn from the positioning hole of the corresponding second telescopic column 112, thereby releasing the relative fixation of the positioning member 53 to the corresponding first telescopic column 111 and the second telescopic column 112, so that the first telescopic column 111 and the second telescopic column 112 can be switched from the expanded state to the retracted state. Therefore, the locking assembly 5 in this design can effectively lock and unlock the two connected telescopic columns 11.

[0050] The elastic member 51 is disposed in the corresponding mounting hole 14a, which means that the elastic member in the locking assembly is disposed in the mounting hole of the cross brace 14 corresponding to the locking assembly. Similarly, the positioning member 53 and the driving member 52 are both disposed in the mounting holes of the corresponding cross brace 14. In the locked state, the end of the positioning member 53 away from the elastic member 51 can be inserted into the corresponding positioning hole of the second telescopic column 112 under the action of the elastic member 51, which means that when the first telescopic column 111 and the second telescopic column 112 are in the unfolded state, the positioning member 53 in the locking assembly 5 for locking the first telescopic column 111 and the second telescopic column 112 can be inserted into the positioning hole of the second telescopic column 112.

[0051] Illustratively, in other embodiments, the locking assembly 5 may not include the elastic member 51, and the driving member 52 is used to move along the corresponding sliding hole 14b to allow the positioning member 53 to insert into or withdraw from the positioning hole of the corresponding second telescopic column 112, thereby driving the locking assembly 5 to switch between the locked state and the unlocked state.

[0052] In one embodiment, as shown in FIG. 1 and FIG. 2 , there are two ladder bodies 10, which are arranged opposite to each other, and the top ends of the two ladder bodies 10 are hinged, and the tool box 2 and the two connecting components 3 are arranged on one of the two ladder bodies 10. In this way, the telescopic ladder 100 is a herringbone ladder structure. When the telescopic ladder 100 is used, the two ladder bodies 10 can be opened at a certain angle by relatively rotating the two ladder bodies 10. When the telescopic ladder 100 is moved, the two ladder bodies 10 can be folded by relatively rotating the two ladder bodies 10, which is conducive to ensuring the safety and convenience of the telescopic ladder 100 during operation. In addition, the telescopic ladder 100 under this structure allows the user to climb the telescopic ladder 100 from the side where the tool box 2 is not arranged, so that the climber can take and put tools and avoid the tool box 2 affecting the climber's movements.

[0053] Schematically, the top ends of the two ladder bodies 10 may be hinged to each other by the first cross braces 141 of the two ladder bodies 10, for example, as shown in FIG1 and FIG2 , the first cross braces 141 of the two ladder bodies 10 are connected by hinges; or, the top ends of the two opposite uprights 1 in the two ladder bodies 10 may be hinged one by one. Preferably, the first cross braces 141 of the two ladder bodies 10 are hinged.

[0054] In one embodiment, as shown in FIG. 1 and FIG. 2 , a support rod 13 is provided between the two ladder bodies 10. The support rod 13 includes at least two support rods 131 hinged in sequence. One of the two support rods 131 located at opposite ends of the at least two support rods 131 is hinged to one of the two ladder bodies 10. The other of the two support rods 131 located at opposite ends of the at least two support rods 131 is hinged to the other of the two ladder bodies 10. The support rod 13 can be folded or unfolded when the two ladder bodies 10 rotate relative to each other. In this way, when the two ladder bodies 10 rotate relative to each other to open a certain angle, the support rod 13 can limit the maximum opening angle of the two ladder bodies 10 to avoid the two ladder bodies 10 from increasing the opening angle due to interference during use, thereby improving the safety performance of the telescopic ladder 100. At the same time. When the two ladder bodies 10 are opened to the maximum opening angle, the support rod 13 can also prevent the two ladder bodies 10 from reducing the opening angle due to external force interference, which ensures the life safety of the user. In addition, since the support rod 13 is formed by hingedly connecting a plurality of supporting rods 131 , when the two ladder bodies 10 are relatively rotated to be folded, the support rod 13 can also be folded, so that the telescopic ladder 100 can effectively reduce its volume.

[0055] Schematically, two of the at least two support rods 131 located at opposite ends are hinged to two opposite columns 1 in the two ladder bodies 10 respectively and one by one, as shown in Figures 1 and 2; or, two of the at least two support rods 131 located at opposite ends are hinged to two opposite second cross braces 142 in the two ladder bodies respectively and one by one.

[0056] Optionally, the number of the support rods 131 can be designed as required, for example, it can be two, three or more. Preferably, the number of the support rods 131 is two, as shown in FIG2 . The number of the support rods 13 can be designed as required, for example, it can be one, two, three or more, wherein when the number of the support rods 13 is multiple, the multiple support rods 13 are arranged at intervals along the extension direction of the cross brace 14. Preferably, as shown in FIG2 , the number of the support rods 13 is two, and the two support rods 13 are arranged at intervals along the extension direction of the cross brace 14, and are connected one-to-one between the two corresponding columns 1 of the two ladder bodies 10.

[0057] In one embodiment, in combination with FIG. 1, FIG. 2 and Figure 4As shown, each stopper 31 includes a sleeve portion 311, a first extension portion 313 and a second extension portion 312, the sleeve portion 311 is sleeved on the corresponding second cross brace 142, the first extension portion 313 and the second extension portion 312 are arranged opposite to each other at intervals, and are both connected to the sleeve portion 311, a sliding member is arranged on the side of the first extension portion 313 opposite to the second extension portion 312, the adjustment rod 33 is arranged between the first extension portion 313 and the second extension portion 312, and the surface of the adjustment rod 33 is provided with a slide groove 331 extending along the extension direction of the adjustment rod 33, and the slide groove 33 1 has a first locking end 331a and a second locking end 331b opposite to each other, the first locking end 331a is located at a side of the second locking end 331b away from the tool box 2, the sliding member is movably arranged in the sliding groove 331, in the locked state, the sliding member is arranged at the first locking end 331a, and in the accommodated state, the sliding member is arranged at the second locking end 331b, the adjusting rod 33 can switch between the locked state and the accommodated state by moving relative to the sliding member, and the fixing member 32 is used to fix the sliding member and the adjusting rod 33 so that the adjusting rod 33 is maintained in the locked state or the accommodated state. In this way, since the adjusting rod 33 is arranged between the first extension part 313 and the second extension part 312, and the sliding member is arranged in the sliding groove 331, during the movement of the adjusting rod 33 relative to the sliding member, the free end of the adjusting rod 33 is restricted by the sliding member and the second extension part 312, so that the adjusting rod 33 will not be separated from the sliding member. Among them, since the sliding member is arranged in the sliding groove 331 of the adjusting rod 33, and the sliding member is fixedly arranged on the first extension portion 313, when the adjusting rod 33 is slid relative to the sliding member, the adjusting rod 33 can rotate and slide relative to the sliding member, so that the adjusting rod 33 will move along a predetermined trajectory, so that when the sliding member slides between the first locking end 331a and the second locking end 331b, the adjusting rod 33 can switch between the locking state and the storage state, so that the tool box 2 can switch between the first fixed posture and the second fixed posture, and then the tool box 2 can not only place tools to assist climbers in climbing, but also can be folded relative to the ladder body 10 to reduce the volume of the telescopic ladder 100.

[0058] Schematically, the first extension portion 313 and the second extension portion 312 are spaced apart in the extension direction of the cross brace 141 .

[0059] In one embodiment, in combination Figure 4As shown, the bottom of the groove of the first locking end 331a is provided with a first fixing hole that penetrates through it, and the bottom of the groove of the second locking end 331b is provided with a second fixing hole that penetrates through it. The fixing member 32 includes a head 321 and a rod 322 connected to the head 321. The head 321 is arranged on the side of the first extension 313 away from the second extension 312. In the locked state, the end of the rod 322 away from the head 321 passes through the first extension 313, the sliding member and the first fixing hole and is detachably connected to the second extension 312. In the accommodated state, the end of the rod 322 away from the head 321 passes through the first extension 313, the sliding member and the second fixing hole 331c and is detachably connected to the second extension 312. In this way, the fixing member 32 can reliably fix the sliding member and the adjustment rod 33, so that the adjustment rod 33 can be fixed in the locked state or the accommodated state. Among them, since the rod portion 322 and the second extension portion 312 are detachably connected, the adjustment rod 33 can be easily slid relative to the sliding member to switch the state of the adjustment rod 33 by only releasing the connection between the rod portion 322 and the second extension portion 312 and pulling the rod portion 322 out of the adjustment rod 33.

[0060] In other embodiments, the first fixing hole and the second fixing hole 331c may not be provided on the adjusting rod 33, wherein in the locked state and the accommodated state, the end of the rod portion 322 away from the head portion 321 can abut against the adjusting rod 33 through the first extension portion 313 and the sliding member to fix the relative position of the adjusting rod 33 and the sliding member.

[0061] In one embodiment, in combination with FIG. Figure 5 and Figure 6As shown, the tool box 2 includes a box body 23, a tray 22, a cover 21 and two rotating rods 25. The box body 23 is hinged with the first cross brace 141 and the adjusting rod 33. The box body cavity 2a is formed in the box body 23. The cover 21 cooperates with the box body 23 in opening and closing. The cover 21 is locked with the box body 23 through a locking assembly 24. The two rotating rods 25 are relatively arranged on both sides of the tray 22. One end of the two rotating rods 25 is rotatably connected to the tray 22, and the other ends of the two rotating rods 25 are connected to the side wall of the box body cavity 2a. The tray 22 matches the box body cavity 2a in shape. In the locked state, the tool box 2 has a closed state and an open state. In the closed state, the tray 22 is accommodated in the box body cavity 2a. In the open state, the cover 21 opens the box body cavity 2a, and the tray 22 leaves the box body cavity 2a and is arranged on the cover 21. In this way, the tool box 2 can form two layers of space for placing tools, wherein larger parts (such as a multimeter) can be placed in the box body cavity 2a, and smaller or more commonly used parts (such as screws, screwdrivers, etc.) can be placed in the tray 22. When the tool box 2 is in a closed state, since the tray 22 can be stored in the box body cavity 2a, and the cover body 21 can reliably close the box body cavity 2a through the lock assembly 24, the tools set in the tray 22 and the box body cavity 2a can stably rise or fall with the tool box 2 without falling from the tool box 2. When the tool box 2 is in an open state, since the tray 22 can leave the box body cavity 2a and be placed in the box body 23, the tray 22 will not only not affect the user's access to the tools in the box body cavity 2a, but also increase the surface area of ​​the tool box 2 for placing tools, so that the user can quickly get the tools he needs. In addition, since the two rotating rods 25 are respectively arranged on opposite sides of the tray 22, and both ends of each rotating rod 25 are respectively hinged to the tray 22 and the box body 23, the rotating rod 25 can guide the movement of the tray 22, so that the tray 22 can be easily stored in the box body cavity 2a without alignment. In addition, in the open state, the rotating rod 25 also plays a role in limiting the sliding of the tray 22 relative to the cover body 21, so that the tools in the tray 22 are not easy to fall, thereby improving the safety during the operation.

[0062] The opening and closing fit means that the cover 21 and the box body 23 have a closed state that can close the box body cavity 2a and an open state that can open the box body cavity 2a, and the cover 21 and the box body 23 can switch between the closed state and the open state. The locking fit means that the two structures have a locked state and a separated state, and the two structures can switch between the locked state and the separated state, wherein in the locked state, the positions of the two structures are locked to each other, and in the separated state, the two structures can be separated from each other.

[0063] Illustratively, the cover 21 is rotatably connected to the box body 23, so that the cover 21 can open or close the box body cavity 2a by rotating relative to the box body 23. Alternatively, the cover 21 is slidably connected to the box body 23, so that the cover 21 can open or close the box body cavity 2a by sliding relative to the box body 23.

[0064] Optionally, the first cross brace 141 is rotatably connected to the box body 23 via a rotating shaft. Schematically, the first cross brace 141 is rotatably connected to the edge of the box body cavity 2a in the box body 23 via a rotating shaft, and the adjustment rod 33 is hinged to the edge of the box body cavity 2a in the box body 23.

[0065] Optional, such as Figure 5 and Figure 6 As shown, the tray 22 is formed with a tray cavity, and at least a partition 221 is provided in the tray cavity, and the partition 221 divides the tray cavity into at least two placement cavities 221a. In this way, the tools on the tray 22 can be classified and placed in the corresponding placement cavities 221a, so that the user can easily get the required tools.

[0066] Optionally, the edge of the tray 22 is provided with an edge extension, which abuts against the opening edge of the box cavity 2a in the closed state, so that the tray 22 can be fixed to the box cavity 2a. Alternatively, the inner wall of the box cavity 2a is provided with an outer protrusion, which abuts against the surface of the tray 22 in the closed state, so that the tray 22 can be fixed to the box cavity 2a.

[0067] Indicative, such as Figure 6 As shown, the number of the rotating rods 25 may be four, wherein the four rotating rods 25 are disposed on opposite sides of the tray 22 in pairs.

[0068] In one embodiment, Figure 5 and Figure 6 As shown, the lock assembly 24 includes a first matching portion 242 and a second matching portion 241 that is locked and matched with the first matching portion 242. The first matching portion 242 is provided on the box body 23, and the second matching portion 241 is provided on the cover body 21. In this way, when the tool is placed in the tool box 2, the box body 23 and the cover body 21 can be fixed by the lock assembly 24 to prevent the tool from falling from the tool box 2 when the telescopic ladder 100 is extended or retracted, thereby ensuring the safety when the tool box 2 is raised or lowered.

[0069] Optionally, the number of the locking components 24 can be set as needed. For example, the number of the locking components 24 is two, and the two locking components 24 are spaced apart along the outer periphery of the cover body 21 .

[0070] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A telescopic ladder, characterized in that: include: A ladder body, the ladder body comprising two uprights, a plurality of cross braces and a plurality of locking assemblies, the two uprights being arranged opposite to each other, each of the uprights comprising a plurality of telescopic columns which are sleeved and connected step by step, the two connected telescopic columns being able to slide relative to each other, and having an expanded state and a retracted state in which the two telescopic columns are relatively extended, the cross braces being connected one by one between the two corresponding telescopic columns of the two uprights, and locking assemblies being provided at both ends of each of the cross braces, the locking assemblies having a locked state and an unlocked state, in the locked state, the locking assemblies being able to lock the two connected telescopic columns so that the two connected telescopic columns are maintained in the expanded state, and in the unlocked state, the two connected telescopic columns being able to switch between the expanded state and the retracted state, the cross brace located at the uppermost end of the ladder body among the plurality of cross braces being a first cross brace, and the remaining cross braces being second cross braces; the two telescopic columns located at the uppermost ends of the uprights being maintained in the expanded state, so that an accommodation space is formed between the first cross brace and the second cross brace adjacent to it; A tool box, the tool box is rotatably connected to the first cross brace, and the tool box forms a box body cavity with an open end; Two connecting components, the two connecting components are arranged opposite to each other at intervals along the extension direction of the cross brace, each of the connecting components comprises a limiter, an adjusting rod and a fixing member, the limiter is arranged on any second cross brace, the adjusting rod is hinged to the tool box, the adjusting rod and the limiter are movably connected, the adjusting rod has a locked state and a received state, the adjusting rod can switch between the locked state and the received state by moving relative to the limiter, and the fixing member is used to fix the limiter and the adjusting rod so that the adjusting rod is maintained in the locked state or the received state; Among them, in the accommodation state, the adjustment rod and the extension direction of the column are consistent, and the tool box is accommodated in the accommodating space. In the locked state, the adjustment rod and the column are set at an angle, the tool box leaves the accommodating space, and the opening of the box body cavity faces upward.

2. The telescopic ladder according to claim 1, characterized in that: A connecting sleeve is sleeved on the outer circumference of each telescopic column, and each telescopic column is connected to the corresponding cross brace through the connecting sleeve.

3. The telescopic ladder according to claim 1, characterized in that: A positioning hole is provided on the surface of each telescopic column. The two connected telescopic columns are respectively a first telescopic column and a second telescopic column. The first telescopic column is sleeved on the outer periphery of the second telescopic column. Both ends of each cross brace are provided with mounting holes extending along the extending direction of the cross brace. The side walls of each mounting hole are provided with sliding holes. Each locking assembly includes a positioning member, a driving member and an elastic member. The elastic member is provided in the corresponding mounting hole. Both the positioning member and the driving member can be movably provided in the corresponding mounting hole. One end of the elastic member is connected to the inner wall of the corresponding mounting hole, and the other end is connected to the positioning member. One end of the driving member is connected to the positioning member, and the other end passes through the corresponding mounting hole through the corresponding sliding hole. In the locked state, one end of the positioning member away from the elastic member can be inserted into the positioning hole of the corresponding second telescopic column under the action of the elastic member. In the unlocked state, the positioning member can be withdrawn from the positioning hole of the corresponding second telescopic column, and the driving member can move along the corresponding sliding hole to drive the locking assembly to switch from the locked state to the unlocked state.

4. The telescopic ladder according to claim 1, characterized in that: There are two ladder bodies, which are arranged opposite to each other and hinged at the top ends of the two ladder bodies. The tool box and the two connecting components are arranged on one of the two ladder bodies.

5. The telescopic ladder according to claim 1, characterized in that: A strut is arranged between the two ladder bodies, and the strut includes at least two support rods hinged in sequence, one of the two support rods located at opposite ends of the at least two support rods is hinged to one of the two ladder bodies, and the other of the two support rods located at opposite ends of the at least two support rods is hinged to the other of the two ladder bodies, and the strut can be folded or unfolded when the two ladder bodies rotate relative to each other.

6. The telescopic ladder according to claim 1, characterized in that: Each of the limiting members includes a sleeve portion, a first extension portion and a second extension portion, the sleeve portion is sleeved on the corresponding second cross brace, the first extension portion and the second extension portion are arranged opposite to each other at an interval, and are both connected to the sleeve portion, a sliding member is arranged on the side of the first extension portion opposite to the second extension portion, the adjusting rod is arranged between the first extension portion and the second extension portion, a sliding groove extending along the extending direction of the adjusting rod is arranged on the surface of the adjusting rod, the sliding groove has a first locking end and a second locking end opposite to each other, the first locking end is located on the side of the second locking end away from the tool box, the sliding member is movably arranged in the sliding groove, in the locked state, the sliding member is arranged at the first locking end, and in the accommodated state, the sliding member is arranged at the second locking end, the adjusting rod can switch between the locked state and the accommodated state by moving relative to the sliding member, and the fixing member is used to fix the sliding member and the adjusting rod so that the adjusting rod is maintained in the locked state or the accommodated state.

7. The telescopic ladder according to claim 6, characterized in that: A first fixing hole is provided at the bottom of the groove of the first locking end, and a second fixing hole is provided at the bottom of the groove of the second locking end. The fixing member includes a head and a rod connected to the head, and the head is arranged on a side of the first extension portion away from the second extension portion. In the locked state, the end of the rod away from the head passes through the first extension portion, the sliding member and the first fixing hole and is detachably connected to the second extension portion. In the accommodated state, the end of the rod away from the head passes through the first extension portion, the sliding member and the second fixing hole and is detachably connected to the second extension portion.

8. The telescopic ladder according to claim 1, characterized in that: The tool box comprises a box body, a tray, a cover body and two rotating rods, the box body is hinged with the first cross brace and the adjusting rod, the box body cavity is formed in the box body, the cover body cooperates with the box body in opening and closing, and the cover body is locked with the box body through a locking assembly, the two rotating rods are relatively arranged on both sides of the tray, one end of the two rotating rods is rotatably connected to the tray, and the other ends of the two rotating rods are connected to the side wall of the box body cavity, the tray matches the shape of the box body cavity, and in the locked state, the tool box has a closed state and an open state, in the closed state, the tray is accommodated in the box body cavity, and in the open state, the cover body opens the box body cavity, and the tray leaves the box body cavity and is arranged on the cover body.

9. The telescopic ladder according to claim 8, characterized in that: The locking assembly includes a first matching portion and a second matching portion that is locked and matched with the first matching portion. The first matching portion is arranged on the box body, and the second matching portion is arranged on the cover body.

10. The telescopic ladder according to claim 1, characterized in that: The ladder body is made of glass fiber reinforced plastic; And / or, the bottom end of each column is provided with an anti-slip sleeve.

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