Novel ladder with safety early warning function

Abstract

The invention relates to the technical field of electric power operation and maintenance, and particularly discloses a novel ladder with a safety early warning function, comprising: a climbing ladder body comprising two ladder stand vertical rods with accommodating grooves on one side and a plurality of ladder stand pedals; the supporting ladder body comprises an upper supporting rod and a lower supporting rod; the elastic locking assembly has a locking state and an unlocking state; a plurality of pressure sensor array assemblies; the alarm assembly is fixedly arranged on the climbing ladder body and electrically connected to the pressure sensor array assemblies; the upper supporting rods and the lower supporting rods have the storage state that the upper supporting rods and the lower supporting rods rotate into the corresponding containing grooves, and have the supporting state that the upper supporting rods and the lower supporting rods rotate to the outer portions of the corresponding containing grooves so as to be matched with the corresponding ladder stand vertical rods to form a herringbone supporting structure. The novel ladder with the safety early warning function has a compact structure and an intelligent load monitoring function, so that the industrial pain point that portability and safety are difficult to consider at the same time is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power operation and maintenance, and in particular to a novel ladder with self-contained safety warning. Background Art

[0002] Foldable ladders are widely used for high-altitude work in scenarios such as power system operation and maintenance and building inspections due to their ease of movement. Currently, mainstream ladders include straight ladders that rely on wall support and self-supporting A-shaped ladders (also known as "herringbone ladders"). However, existing products have significant flaws in both structural design and safety protection.

[0003] (1) Structural level:

[0004] A-shaped ladders must rely on external fixed objects for support during operation, and their applicability is limited when working on outdoor power facilities without reliable attachments (such as substation insulators and tower hardware). Although A-shaped ladders solve the problem of self-support, their folding form is essentially the rigid superposition of two parallel ladder frames ( Figure 1 ). Actual measurements show that conventional A-shaped ladders can be over 25cm thick when folded, making them bulky. This makes them difficult to hold when maintenance personnel frequently move between locations, reducing space utilization in transport vehicles. This is especially problematic in narrow distribution rooms or in the field.

[0005] (2) Safety monitoring level:

[0006] Power operations and maintenance involve heavy equipment such as phase detectors and infrared thermal imagers (often weighing 5-10kg each). Industry regulations clearly require that such equipment must be transported via a hoisting system, and personnel are prohibited from carrying it on ladders. However, in actual operations, operators tend to ignore this regulation due to the complex on-site processes and tight timelines. The root cause is that existing ladders lack load-sensing capabilities:

[0007] The purely mechanical structure of a straight ladder or A-shaped ladder cannot sense changes in the load-bearing capacity of the ladder surface, and therefore cannot implement weight threshold determination or overload warning mechanisms. When operators illegally carry equipment up a ladder, the ladder's center of gravity shifts upward, dramatically increasing the force on the fulcrum. An additional 10kg of weight can increase the risk of the ladder tipping by 300%, yet there is no real-time warning system. Industry accident reports from the past three years show that 17.2% of falls from heights are directly caused by illegally carrying heavy equipment on ladders.

[0008] In summary, existing ladders not only suffer from the physical drawbacks of bulky folding structures, but also lack safety monitoring mechanisms, preventing proactive intervention in high-risk scenarios. There is an urgent need to develop new ladders with compact structures and intelligent load monitoring capabilities to address the industry's pain point of balancing portability and safety.

[0009] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Summary of the Invention

[0010] One purpose of the present invention is to provide a new type of ladder with its own safety warning, which has both a compact structure and an intelligent load-bearing monitoring function, so as to solve the industry pain point of the difficulty in balancing portability and safety.

[0011] To achieve the above objectives, the present invention provides a new type of ladder with self-contained safety warning, comprising:

[0012] A climbing ladder body, comprising two ladder uprights with a receiving groove on one side, and a plurality of ladder steps fixedly mounted on the other side of the two ladder uprights in order from top to bottom;

[0013] A supporting ladder body, the supporting ladder body comprising two supporting upper rods, the upper ends of which extend into the corresponding accommodating grooves and are hinged to the upper ends of the corresponding ladder uprights, and a supporting lower rod threadedly connected to the lower ends of the supporting upper rods to adjust the height of the supporting ladder body;

[0014] an elastic locking assembly mounted at a hinged position between the upper support rod and the ladder upright, the elastic locking assembly having a locked state for locking the relative positions of the upper support rod and the ladder upright, and an unlocked state for releasing the rotation restriction on the upper support rod and the ladder upright;

[0015] A plurality of pressure sensor array assemblies, wherein a group of the pressure sensor array assemblies is provided on the top surface of each ladder step;

[0016] an alarm component, the alarm component being fixedly mounted on the climbing ladder body and electrically connected to each of the pressure sensor array assemblies, and configured to send an alarm message when the instantaneous load-bearing value or the accumulated load-bearing value within a specified time period acquired by any of the pressure sensor array assemblies exceeds a preset safety threshold;

[0017] The upper support rod and the lower support rod have a storage state of being rotated to the corresponding accommodating groove, and a supporting state of being rotated to the outside of the corresponding accommodating groove to cooperate with the corresponding ladder upright to form a herringbone support structure.

[0018] Optionally, the support ladder body further includes a plurality of linkage horizontal plates fixedly mounted on the two support upper rods in sequence from top to bottom.

[0019] Optionally, the linkage horizontal plate and the supporting upper rod are both flush with one side away from the ladder pedal.

[0020] Optionally, the surfaces of the two ladder uprights close to each other are provided with a plate notch for the linkage horizontal plate to pass through, so that when the support ladder body is in the storage state, the ladder uprights, the support upper rod, and the linkage horizontal plate are flush with the side away from the ladder pedal.

[0021] Optionally, the end position of the linkage horizontal plate is clamped with the corresponding supporting upper rod.

[0022] Optionally, the elastic locking assembly includes:

[0023] a central rotating shaft, the central rotating shaft passing through the upper ends of the climbing ladder body and the supporting ladder body;

[0024] A latch plate, the latch plate comprising an annular disc surrounding the outside of the central rotating shaft, and a plurality of limit latches with one end fixed on the annular disc;

[0025] A locking spring is sleeved on the central rotating shaft and is located on the side of the annular disc away from the limit pin, and is used to drive each of the limit pins to pass through the ladder uprights and then insert into the support upper rod to limit the relative rotation between the ladder uprights and the support upper rod.

[0026] Optionally, the ladder upright is provided with a plurality of latch slots arranged around the central axis, and the upper support rod is provided with a plurality of latch positioning slots matching the latch slots;

[0027] When in the unlocked state, the other end of each limit latch retracts into the corresponding latch slot; when in the locked state, the other end of each limit latch is inserted into the corresponding latch positioning slot.

[0028] Optionally, the circumferential surface of the annular disc is a tapered surface that gradually narrows toward the ladder upright to form a hand-gripping space for fingers to extend into.

[0029] Optionally, the upper support rod is a rectangular body with a threaded hole on the bottom surface, and the lower support rod is a cylinder with a threaded rod on the top surface.

[0030] Optionally, the ladder upright is provided with an electrical cavity with an upward opening, a transparent porous cover plate covering the opening of the electrical cavity, and a wire groove extending downward from the bottom of the electrical cavity;

[0031] The alarm assembly includes a lithium battery located in the electrical cavity, a circuit board electrically connected to the lithium battery, and an alarm electrically connected to the circuit board;

[0032] Wherein, the circuit board is provided with a charging interface exposed on the ladder upright, and the alarm is a buzzer and / or a flashing light;

[0033] Each of the pressure sensor array assemblies is electrically connected to the circuit board via a sensor wire, and the sensor wire passes through the wire groove.

[0034] The beneficial effect of the present invention is to provide a new type of ladder with self-contained safety warning, and the working process is as follows:

[0035] 1. Storage and expansion

[0036] (1) When in the storage state, the upper support rod and the lower support rod threadedly connected thereto are integrally rotated and stored in the receiving groove on the side of the ladder upright, thereby minimizing the overall thickness (the overall thickness of the new ladder with self-contained safety warning is substantially equal to the thickness of the climbing ladder body).

[0037] (2) When in use, operate the elastic locking assembly to enter the unlocked state, thereby releasing the restriction on the rotation between the support upper rod and the ladder upright rod.

[0038] (3) Rotate the support ladder (including the upper support rod and the lower support rod) outward to completely disengage it from the receiving groove.

[0039] (4) Adjust the extension length of the support lower rod relative to the support upper rod by rotating the thread, and accurately adjust the height of the support ladder to adapt to uneven ground.

[0040] (5) After being rotated into place, the elastic locking assembly enters the locking state, locking the relative positions of the support upper rod and the ladder upright rod to form a stable herringbone support structure.

[0041] 2. Security early warning monitoring

[0042] (1) When a user steps on any ladder step, the pressure sensor array assembly installed on the top surface of the ladder step senses and measures the load value on the step in real time.

[0043] (2) Each pressure sensor array assembly continuously transmits the measured load-bearing data to an alarm assembly fixed on the climbing ladder.

[0044] (3) The internal processor of the alarm component analyzes and calculates the multiple load-bearing data received, and when it determines that the instantaneous load on any ladder step or the cumulative load within a specified time period (for example, due to illegal carrying of heavy equipment) exceeds the preset safety threshold.

[0045] (4) The alarm component is immediately triggered and sends an alarm message through sound and light (such as a buzzer, warning light) or remote signal (such as a wireless alarm) to remind the user of the risk of overweight.

[0046] Therefore, the new type of ladder with self-contained safety warning provided by the present invention has both a compact structure and an intelligent load-bearing monitoring function to solve the industry pain point of difficulty in balancing portability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0048] Figure 1 A schematic structural diagram of a new type of ladder with self-contained safety warning provided in an embodiment in a supporting state;

[0049] Figure 2 A schematic diagram of the structure of the new ladder with self-contained safety warning provided in the embodiment in the storage state;

[0050] Figure 3 for Figure 2 A partial enlarged schematic diagram of point A in the middle;

[0051] Figure 4 A schematic top view of the novel ladder with self-contained safety warning provided in the embodiment in a stowed state;

[0052] Figure 5 A schematic top view of a new type of ladder with self-contained safety warning provided in an embodiment switching from a storage state to a support state.

[0053] In the picture:

[0054] 1. Climbing ladder body; 101. Ladder upright; 1011. Storage tank; 1012. Electrical cavity; 1013. Transparent porous cover; 1014. Wire trough; 102. Ladder pedal;

[0055] 2. Support the ladder body; 201. Support the upper rod; 2011. Latch positioning slot; 202. Support the lower rod; 203. Linkage horizontal plate;

[0056] 3. Elastic locking assembly; 301. Central shaft; 302. Latch plate; 3021. Annular disc; 3021a. Conical surface; 3022. Limit latch; 303. Locking spring;

[0057] 4. Pressure sensor array assembly;

[0058] 5. Alarm component; 501. Lithium battery; 502. Circuit board; 503. Alarm. DETAILED DESCRIPTION

[0059] Reference to "embodiments" in the present invention means that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present invention, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0060] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The use of relevant terms herein is only for describing specific embodiments and is not intended to limit the present invention.

[0061] In the description of the present invention, the term "and / or" is used to describe a logical relationship between objects, indicating that three possible relationships exist. For example, A and / or B means: A exists, B exists, and both A and B exist. Furthermore, the character " / " generally indicates that the objects are in a logical "or" relationship.

[0062] In the present invention, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0063] Without further restrictions, in the present invention, the words "include", "comprise", "have" or other similar expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0064] Consistent with the understanding in the Examination Guidelines, in the present invention, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of the present invention, "multiple" means two or more (including two), and similar expressions related to "multiple," such as "multiple groups" and "multiple times," are also understood in this manner, unless otherwise specifically defined.

[0065] In the description of the embodiments of the present invention, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present invention or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention.

[0066] Unless otherwise expressly specified or limited, in the description of the embodiments of the present invention, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection between two elements or the interaction relationship between two elements. For those skilled in the art of the technology to which the present invention belongs, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0067] The direct drive mechanism in the present invention can be a linear motor, a cylinder, a hydraulic cylinder, or a motor screw slider assembly, etc.; the rotary drive mechanism can be a servo motor, a stepper motor, or a rotary cylinder, etc.

[0068] See also Figure 1-Figure 5 This embodiment provides a new type of ladder with self-contained safety warning, including:

[0069] The climbing ladder body 1 includes two ladder uprights 101 with a receiving groove 1011 on one side, and a plurality of ladder steps 102 fixed to the other side of the two ladder uprights 101 in order from top to bottom;

[0070] The support ladder body 2 includes two upper support rods 201 whose upper ends extend into the corresponding accommodating grooves 1011 and are hinged to the upper ends of the corresponding ladder uprights 101, and a lower support rod 202 threadedly connected to the lower ends of the upper support rods 201 to adjust the height of the support ladder body 2;

[0071] an elastic locking assembly 3, which is installed at the hinged position of the support upper rod 201 and the ladder upright 101, and has a locked state for locking the relative position of the support upper rod 201 and the ladder upright 101, and an unlocked state for releasing the rotation restriction of the support upper rod 201 and the ladder upright 101;

[0072] A plurality of pressure sensor array assemblies 4, wherein a group of pressure sensor array assemblies 4 is provided on the top surface of each ladder step 102;

[0073] an alarm component 5, the alarm component 5 being fixedly mounted on the climbing ladder body 1 and electrically connected to each of the pressure sensor array components 4, and configured to send an alarm message when the instantaneous load or the accumulated load within a specified time period acquired by any of the pressure sensor array components 4 exceeds a preset safety threshold;

[0074] Among them, the upper support rod 201 and the lower support rod 202 have a storage state of rotating to the corresponding accommodating groove 1011, and a supporting state of rotating to the outside of the corresponding accommodating groove 1011 to cooperate with the corresponding ladder upright 101 to form a herringbone support structure.

[0075] The novel ladder with self-contained safety warning provided by the present invention has the following working process:

[0076] 1. Storage and expansion

[0077] (1) In the storage state, the upper support rod 201 and the lower support rod 202 threadedly connected thereto are rotated as a whole and stored in the accommodating groove 1011 on the side of the ladder upright 101, thereby minimizing the overall thickness (the overall thickness of the new ladder with self-contained safety warning is basically equal to the thickness of the climbing ladder body 1).

[0078] (2) When in use, the elastic locking assembly 3 is operated to enter the unlocked state, thereby releasing the restriction on the rotation between the support upper rod 201 and the ladder upright rod 101.

[0079] (3) Rotate the supporting ladder body 2 (including the supporting upper rod 201 and the supporting lower rod 202) outward so that it is completely out of the accommodating groove 1011.

[0080] (4) The extension length of the support lower rod 202 relative to the support upper rod 201 is adjusted by rotating the thread, and the height of the support ladder 2 is precisely adjusted to adapt to uneven ground.

[0081] (5) After being rotated into position, the elastic locking assembly 3 enters a locking state, locking the relative positions of the support upper rod 201 and the ladder upright rod 101, forming a stable herringbone support structure.

[0082] 2. Security early warning monitoring

[0083] (1) When a user steps on any ladder step 102, the pressure sensor array assembly 4 installed on the top surface of the ladder step 102 senses and measures the load value on the step in real time.

[0084] (2) Each pressure sensor array assembly 4 continuously transmits the measured load-bearing data to the alarm assembly 5 fixed on the climbing ladder body 1.

[0085] (3) The internal processor of the alarm component 5 analyzes and calculates the received multiple load-bearing data, and when it determines that the instantaneous load on any ladder step 102 or the cumulative load within a specified time period (for example, due to illegal carrying of heavy equipment) exceeds the preset safety threshold.

[0086] (4) The alarm component 5 is immediately triggered and sends an alarm message through sound and light (such as a buzzer, warning light) or remote signal (such as a wireless alarm) to remind the user of the risk of overweight.

[0087] Therefore, the new type of ladder with self-contained safety warning provided by the present invention has both a compact structure and an intelligent load-bearing monitoring function to solve the industry pain point of difficulty in balancing portability and safety.

[0088] Optionally, the support ladder body 2 further comprises a plurality of linkage transverse plates 203 sequentially fixed on the two support upper rods 201 from top to bottom. Further, the linkage transverse plates 203 and the support upper rods 201 are flush with one side away from the ladder pedal 102.

[0089] The adjacent surfaces of the two ladder uprights 101 are provided with a notch for the linkage cross plate 203 to pass through, so that when the support ladder body 2 is in the stowed state, the ladder uprights 101, the upper support rod 201, and the linkage cross plate 203 are flush with each other on the side away from the ladder tread 102. The entire support ladder body 2 does not protrude beyond the receiving slot 1011, thereby minimizing the overall thickness of the support ladder body 2 in the stowed state.

[0090] In this embodiment, the ends of the linkage horizontal plate 203 are clipped to the corresponding support upper rods 201. The support ladder 2 primarily serves as a support structure and is not used for load bearing. The linkage horizontal plate 203 is primarily used to synchronize the rotation of the two support upper rods 201 and is not used for people to stand on and bear weight. Therefore, there is no need for cumbersome assembly structures such as bolt locking, and the clip-on structure facilitates assembly and disassembly. Of course, in other embodiments, the ends of the linkage horizontal plate 203 and the corresponding support upper rods 201 can also be locked with bolts, and this is not limited to this invention.

[0091] In this embodiment, the elastic locking assembly 3 includes:

[0092] A central rotation shaft 301, the central rotation shaft 301 passes through the upper ends of the climbing ladder 1 and the supporting ladder 2;

[0093] The latch plate 302 includes an annular disc 3021 surrounding the outside of the central shaft 301 and a plurality of limiting latches 3022 fixed at one end to the annular disc 3021;

[0094] The locking spring 303 is sleeved on the central rotating shaft 301 and is located on the side of the annular disc 3021 away from the limiting pins 3022. It is used to drive each limiting pin 3022 to pass through the ladder upright 101 and then insert into the support upper rod 201 to limit the relative rotation between the ladder upright 101 and the support upper rod 201.

[0095] Furthermore, the ladder upright 101 is provided with a plurality of latch slots arranged around the central rotation axis 301, and the upper support rod 201 is provided with a plurality of latch positioning slots 2011 matching the latch slots;

[0096] When in the unlocked state, the other end of each limit latch 3022 retracts into the corresponding latch slot; when in the locked state, the other end of each limit latch 3022 is inserted into the corresponding latch positioning slot 2011.

[0097] The circumferential surface of the annular disc 3021 forms a tapered surface 3021a that gradually narrows toward the ladder upright 101, forming a gripping space for a finger to enter. When an operator inserts a finger into the gripping space, grips the tapered surface 3021a, and pulls the annular disc 3021 outward, the elastic force of the locking spring 303 is overcome, causing the limit latch 3022 to retract into the latch slot.

[0098] The support upper rod 201 is a rectangular body with a threaded hole on the bottom surface, and the support lower rod 202 is a cylinder with a threaded rod on the top surface. The cylindrical design facilitates the twisting operation.

[0099] Optionally, the ladder upright 101 is provided with an electrical cavity 1012 with an upward opening, a transparent porous cover plate 1013 covering the opening of the electrical cavity 1012, and a wire groove 1014 extending downward from the bottom of the electrical cavity 1012;

[0100] The alarm assembly 5 includes a lithium battery 501 located in the electrical cavity 1012 , a circuit board 502 electrically connected to the lithium battery 501 , and an alarm 503 electrically connected to the circuit board 502 ;

[0101] The circuit board 502 is provided with a charging interface exposed on the ladder upright 101, and the alarm 503 is a buzzer and / or a flash light;

[0102] Each of the pressure sensor array assemblies 4 is electrically connected to the circuit board 502 via a sensor wire, and the sensor wire passes through the wire slot 1014 .

[0103] The transparent porous cover plate 1013 is both light-transmitting and sound-transmitting so as to transmit light and sound alarm information.

[0104] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A new type of ladder with self-contained safety warning, characterized in that: include: A climbing ladder body (1), the climbing ladder body (1) comprising two ladder uprights (101) with a receiving groove (1011) on one side, and a plurality of ladder steps (102) fixedly arranged on the other side of the two ladder uprights (101) in sequence from top to bottom; A supporting ladder body (2), the supporting ladder body (2) comprising two supporting upper rods (201) whose upper ends extend into the corresponding accommodating grooves (1011) and are hinged to the upper ends of the corresponding ladder uprights (101), and a supporting lower rod (202) threadedly connected to the lower ends of the supporting upper rods (201) to adjust the height of the supporting ladder body (2); an elastic locking assembly (3), the elastic locking assembly (3) being mounted at a hinged position between the support upper rod (201) and the ladder upright rod (101), and having a locking state for locking the relative position of the support upper rod (201) and the ladder upright rod (101), and an unlocking state for releasing the rotation restriction on the support upper rod (201) and the ladder upright rod (101); a plurality of pressure sensor array assemblies (4), wherein a group of the pressure sensor array assemblies (4) is provided on the top surface of each ladder step (102); an alarm component (5), the alarm component (5) being fixedly mounted on the climbing ladder body (1) and electrically connected to each of the pressure sensor array components (4), and configured to send an alarm message when the instantaneous load-bearing value or the accumulated load-bearing value within a specified time period acquired by any of the pressure sensor array components (4) exceeds a preset safety threshold; The upper support rod (201) and the lower support rod (202) have a storage state in which they are rotated to the corresponding accommodating groove (1011), and a supporting state in which they are rotated to the outside of the corresponding accommodating groove (1011) to cooperate with the corresponding ladder upright rod (101) to form a herringbone support structure.

2. The new ladder with self-contained safety warning according to claim 1 is characterized in that: The supporting ladder body (2) further comprises a plurality of linkage horizontal plates (203) fixedly mounted on the two supporting upper rods (201) in sequence from top to bottom.

3. The new ladder with self-contained safety warning according to claim 2 is characterized in that: The linkage horizontal plate (203) and the supporting upper rod (201) are flush with each other on a side away from the ladder pedal (102).

4. The new ladder with self-contained safety warning according to claim 3 is characterized in that: The surfaces of the two ladder uprights (101) close to each other are provided with a plate-passing notch for the linkage transverse plate (203) to pass through, so that when the support ladder body (2) is in the storage state, the ladder uprights (101), the support upper rod (201), and the linkage transverse plate (203) are flush with the side away from the ladder pedal (102).

5. The new ladder with self-contained safety warning according to claim 3 is characterized in that: The end portion of the linkage horizontal plate (203) is clamped to the corresponding supporting upper rod (201).

6. The new ladder with self-contained safety warning according to claim 1 is characterized in that: The elastic locking assembly (3) comprises: A central rotating shaft (301), the central rotating shaft (301) passing through the upper ends of the climbing ladder body (1) and the supporting ladder body (2); A latch plate (302), the latch plate (302) comprising an annular disc (3021) surrounding the outside of the central rotating shaft (301), and a plurality of position limiting latches (3022) fixed at one end to the annular disc (3021); A locking spring (303) is sleeved on the central rotating shaft (301) and is located on a side of the annular disc (3021) away from the limiting latch (3022), and is used to drive each limiting latch (3022) to pass through the ladder upright (101) and then be inserted into the support upper rod (201) to limit the relative rotation between the ladder upright (101) and the support upper rod (201).

7. The new ladder with self-contained safety warning according to claim 6 is characterized in that: The ladder upright (101) is provided with a plurality of latch slots arranged around the central rotating shaft (301), and the upper support rod (201) is provided with a plurality of latch positioning slots (2011) matching the latch slots. When in the unlocked state, the other end of each limit latch (3022) retracts into the corresponding latch slot; when in the locked state, the other end of each limit latch (3022) is inserted into the corresponding latch positioning slot (2011).

8. The new ladder with self-contained safety warning according to claim 6 is characterized in that: The circumferential surface of the annular disc (3021) is a tapered surface (3021a) that gradually narrows toward the ladder upright (101), so as to form a hand-gripping space for fingers to be inserted into.

9. The new ladder with self-contained safety warning according to claim 1 is characterized in that: The supporting upper rod (201) is a rectangular body with a threaded hole on the bottom surface, and the supporting lower rod (202) is a cylinder with a threaded rod on the top surface.

10. The new ladder with self-contained safety warning according to claim 1 is characterized in that: The ladder upright (101) is provided with an electrical cavity (1012) with an upward opening, a transparent porous cover plate (1013) covering the opening of the electrical cavity (1012), and a wire groove (1014) extending downward from the bottom of the electrical cavity (1012); The alarm component (5) comprises a lithium battery (501) located in the electrical cavity (1012), a circuit board (502) electrically connected to the lithium battery (501), and an alarm (503) electrically connected to the circuit board (502); The circuit board (502) is provided with a charging interface exposed on the ladder upright (101), and the alarm (503) is a buzzer and / or a flashing light; Each of the pressure sensor array assemblies (4) is electrically connected to the circuit board (502) via a sensor wire, and the sensor wire passes through the wire slot (1014).

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