Smart ladder

Abstract

The present application relates to a smart ladder, comprising a ladder frame, pressure sensors and a display module, wherein the pressure sensors are mounted at the bottom of the ladder frame, the display module is connected to the pressure sensors, and the display module is used for displaying gravity changes of the ladder frame. The present application also relates to a smart ladder, comprising a ladder frame, connecting pieces, supporting pieces and pressure sensors, wherein the connecting pieces are arranged on ladder feet, the supporting pieces are used for being in contact with the ground, each pressure sensor comprises a first contact portion, a second contact portion and a deformation portion, the first contact portion and the second contact portion are connected by means of the deformation portion, a connecting boss of a connecting piece is connected to the first contact portion, a supporting piece is connected to the second contact portion, and the first contact portion is capable of moving relative to the second contact portion, such that the deformation portion is deformed, so as to increase the detection accuracy of the pressure sensor. The present application also relates to a smart ladder, comprising a ladder frame, pressure sensors and a warning module, wherein the pressure sensors are mounted on ladder feet, and the warning module warns a user about the load condition of the ladder frame.

Description

Intelligent ladder TECHNICAL FIELD

[0001] The present application relates to the technical field of ladder, in particular to an intelligent ladder. BACKGROUND

[0002] The ladder is mainly used to provide a passage to a high place for people. However, each ladder has its own load limit. If the weight supported by the ladder exceeds the load limit of the ladder when the ladder is used, the ladder is likely to be damaged or collapsed, which can cause serious injuries to the user and other nearby personnel.

[0003] The existing ladder cannot display the current load condition of the user, or there may be a deviation between the actual load of the ladder and the load data displayed by the ladder, or it cannot timely issue a warning. Therefore, the user has a safety risk when climbing the ladder under load. SUMMARY

[0004] Therefore, the present application provides an intelligent ladder to solve the above problems.

[0005] To achieve one or part or all of the above purposes or other purposes, the present application provides:

[0006] The intelligent ladder comprises:

[0007] A ladder frame;

[0008] At least one pressure sensor installed at the bottom of the ladder frame, the at least one pressure sensor being configured to detect changes in the gravity of the ladder frame;

[0009] A display module electrically connected or wirelessly connected to the at least one pressure sensor, the display module being configured to display changes in the gravity of the ladder frame.

[0010] The implementation of the present application will have the following beneficial effects:

[0011] After using the above intelligent ladder, the pressure sensor is installed at the bottom of the ladder frame, and the pressure sensor is used to detect the changes in the gravity of the ladder frame, i.e. to detect the load condition of the ladder frame. The load data obtained by the pressure sensor is transmitted to the display module, and the load data is presented to the user for observation by the display module, so that the user can confirm the state of the ladder frame in real time.

[0012] To achieve one or part or all of the above purposes or other purposes, the present application further provides:

[0013] The intelligent ladder comprises:

[0014] A ladder frame, the bottom of the ladder frame being provided with a ladder foot;

[0015] A connector is disposed on the ladder leg and has a connecting boss.

[0016] Support member, the support member being used to abut against the ground;

[0017] A pressure sensor includes a first contact portion, a second contact portion, and a deformation portion. The first contact portion and the second contact portion are connected through the deformation portion. A connecting boss is connected to or abuts against the first contact portion. A support member is connected to or abuts against the second contact portion. The connecting boss can drive the first contact portion to move relative to the second contact portion under the action of an external force, so that the deformation portion deforms.

[0018] Implementing the embodiments of this application will have the following beneficial effects:

[0019] After adopting the above-mentioned intelligent ladder, the support component makes hard contact with the ground, so that the first contact part and the second contact part are staggered and connected through the deformation part. This allows the pressure transmitted from the ladder feet to the pressure sensor to be fully reflected in the deformation of the deformation part, thereby improving the detection accuracy of the pressure sensor.

[0020] To achieve one or more of the above objectives or other objectives, this application also proposes:

[0021] Smart ladders include:

[0022] A ladder frame, wherein the bottom of the ladder frame is provided with ladder feet;

[0023] A pressure sensor, which is installed at the foot of the ladder;

[0024] An early warning module is installed on the ladder frame and electrically connected to the pressure sensor.

[0025] Implementing the embodiments of this application will have the following beneficial effects:

[0026] After adopting the above-mentioned smart ladder, the early warning module can provide users with early warnings based on the detection results of the pressure sensor regarding the load condition of the ladder frame. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 is a schematic diagram of the overall structure of one embodiment.

[0029] Fig. 2 is an exploded assembly view of a portion of the support leg of one embodiment.

[0030] Fig. 3 is an enlarged view of the portion of Fig. 2 indicated by the letter A.

[0031] Fig. 4 is a schematic view of the structure of a force receiving member of one embodiment.

[0032] Fig. 5 is a schematic view of a cross-sectional structure of a portion of the support leg of one embodiment.

[0033] Fig. 6 is a schematic view of the overall structure of one embodiment.

[0034] Fig. 7 is an enlarged view of the portion of Fig. 6 indicated by the letter B.

[0035] Fig. 8 is a schematic view of the distribution of wires of one embodiment.

[0036] Fig. 9 is a schematic view of a connection structure between a sound emitting unit, an information processing unit, pressure sensors, and a display module of one embodiment.

[0037] Fig. 10 is a schematic view of another connection structure between a sound emitting unit, an information processing unit, pressure sensors, and a display module of one embodiment.

[0038] Fig. 11 is a schematic view of the overall structure of another embodiment.

[0039] Fig. 12 is a schematic view of the installation of a connecting member, a support member, and a cover member at a support leg of another embodiment.

[0040] Fig. 13 is an exploded assembly view of the structure installed at the support leg of another embodiment.

[0041] Fig. 14 is a schematic view of the structure of a connecting member of another embodiment.

[0042] Fig. 15 is a schematic view of the installation of a connecting member and a pressure sensor of another embodiment.

[0043] Fig. 16 is a schematic view of a cross-sectional structure of a portion of the support leg of another embodiment.

[0044] Fig. 17 is a schematic view of the installation structure of a connecting member, a support member, and a pressure sensor of another embodiment.

[0045] Fig. 18 is a schematic view of a cross-sectional structure of a connecting member of another embodiment.

[0046] Fig. 19 is a schematic view of the installation of a pressure sensor on a support member of another embodiment.

[0047] Fig. 20 is a schematic view of the assembly structure of a pressure sensor and a support member of another embodiment.

[0048] Figure 21 is a cross-sectional view of a support member of another embodiment.

[0049] Figure 22 is a schematic view of an overall structure of another embodiment.

[0050] Figure 23 is an exploded assembly view of a main frame, a sub-frame, and a pedal of another embodiment.

[0051] Figure 24 is a cross-sectional view of a ladder leg of another embodiment.

[0052] Figure 25 is a schematic view of a bottom structure of another embodiment.

[0053] Figure 26 is a schematic view of a handrail and a warning module mounted thereon of another embodiment.

[0054] Figure 27 is an exploded assembly view of a warning module of another embodiment.

[0055] Figure 28 is an exploded assembly view of a warning module of another embodiment.

[0056] Figure 29 is a cross-sectional view of a warning module of another embodiment.

[0057] Figure 30 is a schematic view of an overall structure of another embodiment.

[0058] 1a - ladder frame; 11a - mounting groove; 12a - first connecting part; 13a - support leg; 14a - wire passage; 101a - first support frame; 102a - second support frame; 103a - pedal set; 1011a - first rod; 1021a - second rod; 1022a - cross rod; 2a - pressure sensor; 3a - display module; 31a - clamping boss; 4a - force receiving member; 41a - contact member; 42a - abutting column; 411a - second connecting part; 412a - contact boss; 5a - wire; 1b - ladder frame; 11b - ladder leg; 12b - handrail; 13b - support rod; 14b - pedal; 130b - wire passage; 2b - connecting member; 21b - connecting boss; 22b - connecting column; 23b - connecting body; 24b - first buckle structure; 201b - accommodating cavity; 202b - buffer space; 203b - through slot; 221b - first annular limiting edge; 241b - first connecting arm; 242b - first buckling part; 2421b - first clamping surface; 3b - support member; 31b - support body; 32b - second buckle structure; 311b - second annular limiting edge; 312b - abutting column; 321b - second connecting arm; 322b - second buckling part; 3221b - second clamping surface; 4b - pressure sensor; 41b - first contact part; 42b - second contact part; 43b - deformation part; 411b - upper surface of first contact part; 412b - lower surface of first contact part; 421b - upper surface of second contact part; 422b - lower surface of second contact part; 5b - shielding member; 51b - exposure port; 6b - early warning module; 7b - wire; 8b - shell; 1c - ladder frame; 11c - ladder leg; 12c - rod; 13c - pedal; 14c - main frame body; 15c - auxiliary frame body; 101c - mounting hole; 102c - power supply hole; 120c - wire passage; 121c - support rod; 122c - handrail rod; 123c - stabilizing rod; 124c - linkage rod; 125c - positioning rod; 126c - cross rod; 131c - clamping groove; 132c - clamping hook; 2c - pressure sensor; 3c - early warning module; 31c - mounting shell; 32c - functional unit; 33c - mounting sleeve; 34c - control board; 35c - power supply device; 36c - charging device; 311c - first shell; 312c - second shell; 313c - mounting part; 314c - buffer part; 315c - window; 321c - display unit; 322c - buzzer unit; 323c - light-emitting unit; 324c - voice unit; 325c - vibration unit; 341c - connecting terminal; 3111c - first body part; 3112c - first extension part; 3121c - second body part; 3122c - second extension part; 3131c - first connecting column; 3132c - second connecting column; 3133c - locking member; 4c - wire. DETAILED DESCRIPTION

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the use herein of terms such as "comprise", "have" and "include" or variations such as "comprises", "comprising", "includes" and "including", is intended to be construed in a non-exclusive manner. The use herein of terms such as "first", "second", and the like does not imply a limitation on the number of objects that can comprise the subject of those terms.

[0060] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0061] In order to make the technical personnel in the art better understand the scheme of the application, the technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings.

[0062] Referring to FIGS. 1 to 8, the application proposes an intelligent ladder, which comprises a ladder frame 1a, a pressure sensor 2a and a display module 3a. The load condition of the ladder frame 1a is detected by the pressure sensor 2a, and the load condition is presented to the user by the display module 3a.

[0063] Specifically, the ladder frame 1a is used for the user to climb, and the pressure sensor 2a is at least one, which is installed at the bottom of the ladder frame 1a, and is used to detect the gravity change of the ladder frame 1a.

[0064] In the embodiment, the display module 3a is installed on the ladder frame 1a, and the display module 3a has a display screen, the display module 3a is electrically connected with the pressure sensor 2a through a wire 5a, and a battery is arranged on the display module 3a. In this embodiment, the display module 3a is integrated on the ladder frame 1a, so as to prevent the user from missing the display module 3a.

[0065] In other embodiments, the display module 3a can be arranged completely independently of the ladder frame 1a, and the display module 3a and the pressure sensor 2a are both provided with built-in batteries, and the display module 3a is wirelessly connected with the pressure sensor 2a, for example, through Bluetooth connection.

[0066] In addition, the intelligent ladder further has an information processing unit for processing information acquired by the pressure sensor 2a, which can be integrated on the pressure sensor 2a or arranged on the ladder frame 1a or the display module 3a. As shown in FIG. 9, the information processing unit is arranged on the display module 3a.

[0067] Specifically, since the pressure sensor 2a is installed at the bottom of the ladder frame 1a, the pressure sensor 2a is used to detect the change of gravity of the ladder frame 1a, i.e. the load condition of the ladder frame 1a. The pressure sensor 2a transmits the acquired load data to the display module 3a, and the display module 3a presents the load data to the user for observation, so that the user can confirm the state of the ladder frame 1a in real time.

[0068] In the embodiment, the pressure sensor 2a is specifically a resistance strain sensor.

[0069] In a preferred embodiment, as shown in FIG. 2, the intelligent ladder further comprises at least one force receiving member 4a installed at the bottom of the ladder frame 1a, which is used to contact the ground and can be elastically deformed, and at least one force receiving member 4a is arranged on the at least one pressure sensor 2a. The force receiving member 4a is supported on the ground, and when the ladder frame 1a is loaded, the force receiving member 4a will be deformed and press the pressure sensor 2a, and the pressure sensor 2a will acquire load data according to the pressing degree. In other embodiments, a slidable telescopic rod can also be arranged at the bottom of the ladder frame 1a, and the pressure sensor 2a is arranged at the top of the telescopic rod, and when the telescopic rod is supported on the ground, the telescopic rod will press the pressure sensor 2a.

[0070] As to the specific structure of the force receiving member 4a, in the preferred embodiment, as shown in Figs. 3, 4 and 5, the force receiving member 4a comprises a contact member 41a and a bearing column 42a. The contact member 41a is installed at the bottom of the ladder stand 1a and is used to contact the ground. The contact member 41a can be elastically deformed. The bearing column 42a is vertically inserted into the contact member 41a and bears against the bottom surface of the pressure sensor 2a. The bearing column 42a can rise and fall with the elastic deformation of the contact member 41a. The degree of the rise and fall of the bearing column 42a corresponds to the pressure applied to the pressure sensor 2a. A contact boss 412a is arranged at the bottom of the contact member 41a. The bottom surface of the contact boss 412a is designed in a circular arc shape so that the central part of the contact boss 412a contacts the ground. The bearing column 42a extends into the contact boss 412a. When the contact boss 412a bears against the ground, the load of the ladder stand 1a will drive the contact boss 412a to move towards the ground. However, due to the reaction force of the ground against the contact boss 412a, the central part of the contact boss 412a will be pressed upwards and elastically deformed, so that the bearing column 42a is lifted upwards relative to the contact member 41a, that is, the bearing column 42a is lifted upwards against the pressure sensor 2a. The pressure sensor 2a measures the pressure applied thereto according to the degree of deformation, and the load data of the ladder stand 1a can be obtained by corresponding conversion. The bottom surface of the contact boss 412a designed in an arc shape makes the force point of the contact boss 412a appear at the center, so that the pressure generated when the contact boss 412a is deformed can be more accurately transmitted to the bearing column 42a.

[0071] In the preferred embodiment, the contact member 41a is made of rubber, so that the contact member 41a is more easily deformed. The bearing column 42a is made of metal, and can be a steel column or a copper column, so that the strength of the bearing column 42a is higher and the pressure applied to the pressure sensor 2a is more accurate.

[0072] Further, as shown in Fig. 3, a mounting groove 11a is arranged at the bottom of the ladder stand 1a. The pressure sensor 2a is embedded in the mounting groove 11a. The contact member 41a is installed below the mounting groove 11a and covers the mounting groove 11a and the pressure sensor 2a in the mounting groove 11a. The contact member 41a bears against the bottom of the pressure sensor 2a. When the bottom of the contact member 41a is deformed under pressure, the bearing column 42a protrudes upwards and is higher than the top surface of the contact member 41a. At this time, the pressure applied to the pressure sensor 2a by the bearing column 42a represents the load of the ladder stand 1a.

[0073] Specifically, a first connecting part 12a is arranged at the bottom of the ladder stand 1a. A second connecting part 411a is arranged on the circumferential side of the contact member 41a. Holes are arranged in the first connecting part 12a and the second connecting part 411a. The first connecting part 12a and the second connecting part 411a are connected and locked by bolts.

[0074] Further, in order to make the intelligent ladder can self prompt users of its load, in the preferred embodiment, a sound unit is arranged on the display module 3a, which is a loudspeaker. When the pressure sensor 2a detects that the ladder frame 1a has a load, the display module 3a learns the information and makes a voice prompt through the loudspeaker. In this embodiment, the connection structure between the sound unit, the information processing unit, each pressure sensor 2a and the display module 3a is shown in Figure 9.

[0075] In other embodiments, a sound unit can also be arranged on the ladder frame 1a, which is electrically connected with the pressure sensor 2a. The sound unit is a buzzer. When the pressure sensor 2a detects that the ladder frame 1a has an overload, the sound unit emits an alarm sound. In this other embodiment, the connection structure between the sound unit, the information processing unit, each pressure sensor 2a and the display module 3a is shown in Figure 10.

[0076] Further, in one embodiment, the ladder frame 1a is designed in a folding ladder structure, specifically, the ladder frame 1a includes a first support frame 101a and a second support frame 102a. The top of the first support frame 101a and the top of the second support frame 102a are hinged, the bottom of the first support frame 101a is provided with at least two support legs 13a, and the bottom of the second support frame 102a is provided with at least one support leg 13a. The at least one pressure sensor 2a is installed at the bottom of any support leg 13a. That is, the foldable ladder frame 1a can be a tripod, a quadrangular ladder, a hexagonal ladder, an octagonal ladder, etc. The pressure sensor 2a installed on any support leg 13a can achieve the purpose of detecting the load.

[0077] Of course, in order to make the detection result more accurate, in the preferred embodiment, a plurality of pressure sensors 2a are arranged, and the number of pressure sensors 2a is the same as the number of support legs 13a, and a pressure sensor 2a is installed at the bottom of each support leg 13a. Corresponding to the bottom of each support leg 13a is provided with a mounting groove 11a, and each support leg 13a is provided with a force receiving member 4a. The data collected by each pressure sensor 2a is centralized to the information processing unit for conversion processing, and the conversion form is similar to an electronic scale. The accurate data processed by the information processing unit is sent to the display module 3a, and the data is presented by the display screen.

[0078] In addition, for the embodiment in which the display is installed on the ladder stand 1a, specifically, the display module 3a is installed on the first support frame 101a through the clamping mechanism, the first support frame 101a and the second support frame 102a are both hollow inside and form a wire passage 14a, the wire passage 14a extends downward and connects to the installation slot 11a, the pressure sensor 2a is electrically connected to the display module 3a through the wire 5a, the wire 5a is arranged through the wire passage 14a, and the wire 5a inside the second support frame 102a can extend out of the top of the second support frame 102a and then be connected to the display module 3a. Alternatively, the wire 5a inside the second support frame 102a can pass through the hinge shaft between the second support frame 102a and the first support frame 101a and extend into the first support frame 101a, and then be connected to the display module 3a together with the wire 5a inside the first support frame 101a. The distribution structure of the wire 5a is shown in FIG. 8.

[0079] In addition, as shown in FIG. 1, the first support frame 101a includes two first rods 1011a and a pedal set 103a rotatably arranged between the two first rods 1011a, and the bottom of each first rod 1011a is a support foot 13a. The second support frame 102a includes two second rods 1021a and a cross rod 1022a connecting the two second rods 1021a, and the bottom of each second rod 1021a is also a support foot 13a. The pedal set 103a can be overlapped on the cross rod 1022a when unfolded, thereby providing a standing plane for the user.

[0080] Regarding the clamping mechanism used by the display module 3a, as shown in FIG. 7, specifically, two clamping bosses 31a are arranged on the back of the display module 3a, the two clamping bosses 31a are respectively abutted on the two sides of one of the first rods 1011a, the two clamping bosses 31a are connected through bolts, and the two clamping bosses 31a can be driven to clamp the first rod 1011a together by screwing the bolts. The display module 3a is installed using the clamping mechanism, which can facilitate the adjustment of its position to adapt to the usage habits of different users.

[0081] Referring to FIGS. 11 to 21, the present application also provides an intelligent ladder, which includes a ladder stand 1b, a connecting piece 2b, a pressure sensor 4b, and a support 3b. The bottom of the ladder stand 1b is provided with a ladder foot 11b, and the connecting piece 2b is installed on the ladder foot 11b.

[0082] The pressure sensor 4b comprises a first contact portion 41b, a second contact portion 42b and a deformation portion 43b, the first contact portion 41b and the second contact portion 42b are connected through the deformation portion 43b, the first contact portion 41b is configured to move relative to the second contact portion 42b under external force, so that the deformation portion 43b is deformed. The deformation of the deformation portion 43b will generate a corresponding electrical signal, so that the detection of the electrical signal can detect the load degree of the ladder stand 1b.

[0083] Specifically, the connecting piece 2b is provided with a connecting boss 21b, and the connecting boss 21b is connected with or abuts against the first contact portion 41b. The support piece 3b is connected with or abuts against the second contact portion 42b, and the support piece 3b is used to abut against the ground. When the ladder stand 1b is loaded, the ladder leg 11b is pressed down, and the connecting piece 2b and the corresponding connecting boss 21b installed on the ladder leg 11b are synchronously pressed down. Because the support piece 3b abuts against the ground, the second contact portion 42b is fixed relative to the support piece 3b, so that the second contact portion 42b and the support piece 3b can be regarded as a whole, that is, the second contact portion 42b does not displace, so as to drive the first contact portion 41b to move relative to the second contact portion 42b, and the deformation portion 43b is deformed.

[0084] Therefore, the intelligent ladder makes hard contact with the ground by the support piece 3b, so that the first contact portion 41b and the second contact portion 42b are staggered and connected through the deformation portion 43b. When the ladder stand 1b is loaded, the weight borne by the ladder stand 1b is transmitted from the ladder leg 11b to the pressure sensor 4b, and is fully reflected in the deformation degree of the deformation portion 43b, so as to improve the detection accuracy of the pressure sensor 4b.

[0085] In order to further improve the detection accuracy, in some embodiments, the projections of the first contact portion 41b and the second contact portion 42b in the vertical direction do not intersect each other, that is, the support piece 3b is not connected with the first contact portion 41b, and the connecting piece 2b is not connected with the second contact portion 42b. Therefore, when the first contact portion 41b and the second contact portion 42b move relative to each other, the deformation of the pressure sensor 4b is basically concentrated on the deformation portion 43b.

[0086] In addition, the ladder leg 11b is provided with at least two, and the connecting piece 2b, the pressure sensor 4b and the support piece 3b are each provided with at least one. One connecting piece 2b, one pressure sensor 4b and one support piece 3b are combined and installed on one of the ladder legs 11b, so as to realize the detection of the load capacity of the ladder stand 1b. In order to prevent the local force of the ladder stand 1b from affecting the overall detection accuracy, the number of the connecting piece 2b, the pressure sensor 4b and the support piece 3b is set corresponding to the number of the ladder legs 11b, so that the pressure sensor 4b is arranged at each of the ladder legs 11b, and the final load condition of the ladder stand 1b is obtained by comprehensively analyzing the detection results of all the pressure sensors 4b.

[0087] In some embodiments, the thickness of the pressure sensor 4b can be set to 2mm-5mm, i.e. the thickness of the first contact portion 41b, the second contact portion 42b and the deformation portion 43b are all within the range of 2mm-5mm, for example, set to 4mm, 3.5mm, 3mm or 2.5mm. The thickness of the first contact portion 41b, the second contact portion 42b and the deformation portion 43b can be the same or different. For example, the thickness of the first contact portion 41b, the second contact portion 42b and the deformation portion 43b are all set to 3mm.

[0088] In some embodiments, as shown in FIG. 11, the smart ladder is a foldable ladder, so that the ladder frame 1b can be folded or unfolded, and the ladder frame 1b has four ladder legs 11b after being unfolded, and a pressure sensor 4b and a support 3b are arranged at each of the ladder legs 11b. The ladder frame 1b includes four support rods 13b and a plurality of steps 14b, the bottom of each support rod 13b forms a ladder leg 11b, and two of the support rods 13b constitute a main frame body, and the other two support rods 13b constitute a sub-frame body, which is hinged to the main frame body. The folding or unfolding of the smart ladder is mainly realized by rotating the sub-frame body. The steps 14b are connected to the two support rods 13b constituting the main frame body, and the steps 14b are provided with anti-skid patterns to make the user stand more stably on the steps 14b. Among them, the two support rods 13b constituting the sub-frame body are connected and fixed to each other by at least one stabilizing rod, for example, two stabilizing rods are arranged to connect the two support rods 13b to strengthen the structural strength. Further, an additional two stabilizing rods can be arranged to connect the two support rods 13b constituting the sub-frame body, and the additional two stabilizing rods are cross-distributed to form an “X” shape, further strengthening the structural strength of the sub-frame body.

[0089] Referring to FIGS. 13, 15, 17 and 19, in some embodiments, the pressure sensor 4b is located between the connecting boss 21b and the support 3b, so that the connecting boss 21b and the support 3b contact two opposite surfaces of the pressure sensor 4b respectively. For example, the connecting boss 21b is abutted on the upper surface 411b of the first contact portion 41b, and the support 3b is fixed on the lower surface 422b of the second contact portion 42b by a bolt. For another example, the connecting boss 21b is fixed on the lower surface 412b of the first contact portion 41b by a bolt, and the support 3b is partially located on the upper surface 421b of the second contact portion 42b and fixed by a bolt.

[0090] It can be understood that in other embodiments, the connecting boss 21b and the support 3b can simultaneously contact the same side surface of the pressure sensor 4b, for example, the connecting boss 21b is abutted on the upper surface 411b of the first contact portion 41b, and the support 3b is partially located on the upper surface 421b of the second contact portion 42b and fixed by a bolt. Such embodiments are not shown in the drawings.

[0091] As can be seen from the above embodiments, no matter whether the connecting boss 21b contacts the upper surface 411b of the first contact part 41b or the lower surface 412b of the first contact part 41b, the first contact part 41b can move synchronously with the connecting boss 21b. Similarly, no matter whether the support 3b contacts the upper surface 421b of the second contact part 42b or the lower surface 422b of the second contact part 42b, the second contact part 42b can move synchronously with the support 3b.

[0092] In some embodiments, as shown in FIG. 19, the first contact part 41b is arranged around the second contact part 42b, i.e., the first contact part 41b is annular and the second contact part 42b is arranged in the annulus of the first contact part 41b, and the connecting boss 21b is annularly arranged. It can be understood that, in other embodiments, the second contact part 42b is arranged around the first contact part 41b, i.e., the second contact part 42b is annular and the first contact part 41b is arranged in the annulus of the second contact part 42b, and the support 3b is annularly arranged. Such other embodiments are not shown in the drawings. It should be noted that the annulus in the above two embodiments can be an open annulus or a closed annulus.

[0093] The following description is based on the embodiment in which the connecting boss 21b abuts against the upper surface 411b of the first contact part 41b, the support 3b is connected to the lower surface 422b of the second contact part 42b, and the first contact part 41b is arranged around the second contact part 42b.

[0094] Further, as shown in FIGS. 13, 14, 16 and 19, the connecting member 2b is provided with a buffer space 202b, and the second contact part 42b is movable in the buffer space 202b, i.e., when the first contact part 41b is pressed downward relative to the second contact part 42b, the second contact part 42b can enter the buffer space 202b. The provision of the buffer space 202b can prevent the connecting member 2b from directly contacting the second contact part 42b and affecting the accuracy of the detection result.

[0095] Specifically, the connecting member 2b is provided with a receiving cavity 201b for accommodating the pressure sensor 4b, and the receiving cavity 201b can protect the pressure sensor 4b. The receiving cavity 201b is provided with a connecting column 22b, and the connecting column 22b is hollow to form the buffer space 202b inside. Correspondingly, the connecting boss 21b is arranged around the inner wall of the connecting column 22b, and the connecting boss 21b can be annularly arranged on the inner wall of the connecting column 22b. In other embodiments, the connecting boss 21b can also be a plurality of bosses arranged around the inner wall of the connecting column 22b and not connected to each other, and the plurality of connecting bosses 21b can abut against different parts of the upper surface of the first contact part 41b.

[0096] In addition, a through slot 203b is formed on the connecting column 22b to communicate the buffer space 202b and the accommodating cavity 201b, as shown in FIGS. 14 and 16. The through slot 203b also penetrates the annular connecting boss 21b and is used for the deformation portion 43b to pass through, so as to provide a deformation space for the deformation portion 43b, thereby preventing the connecting member 2b from interfering with the deformation of the deformation portion 43b.

[0097] It can be understood that in other embodiments, the connecting boss 21b can be arranged to abut against the upper surface 411b of the first contact portion 41b, the support member 3b is connected to the lower surface 422b of the second contact portion 42b, and the second contact portion 42b surrounds the first contact portion 41b. In this embodiment, the connecting member 2b surrounds the connecting boss 21b to form a buffer space 202b, i.e., the connecting boss 21b is located in the middle of the buffer space 202b, and the buffer space 202b is used to provide a movement space for the second contact portion 42b, so that the connecting member 2b does not interfere with the movement of the second contact portion 42b. Correspondingly, an additional buffer space 202b is arranged on the support member 3b, and the additional buffer space 202b is used for the first contact portion 41b to move, so that the support member 3b does not interfere with the movement of the first contact portion 41b.

[0098] Further, referring to FIGS. 13 to 15, the connecting column 22b is provided with a first annular limiting edge 221b arranged around the first contact portion 41b, and the first annular limiting edge 221b is used to position the first contact portion 41b, so as to facilitate correct installation of the pressure sensor 4b on the connecting member 2b, so that the first contact portion 41b and the connecting boss 21b are in correct contact.

[0099] Regarding the connection structure between the pressure sensor 4b and the connecting member 2b, a detachable structure design can be adopted, which is mainly used to facilitate maintenance or replacement of the pressure sensor 4b. Referring to FIGS. 13 to 18, for example, in some embodiments, the connecting member 2b includes a connecting body 23b and a first buckle structure 24b formed on the connecting body 23b, and the connecting boss 21b and the first buckle structure 24b are both formed on the connecting column 22b, and the first buckle structure 24b and the connecting boss 21b jointly clamp the first contact portion 41b.

[0100] Specifically, the first buckle structure 24b comprises a first connecting arm 241b and a first buckling portion 242b formed on the first connecting arm 241b, and the first connecting arm 241b, the first buckling portion 242b and the connecting main body 23b are integrally formed. The first buckling portion 242b has a first clamping surface 2421b, the first contact portion 41b is located between the first clamping surface 2421b and the connecting boss 21b, and the distance D1 from the first clamping surface 2421b to the connecting boss 21b is greater than or equal to the thickness H1 of the first contact portion 41b, as shown in FIG. 18, and the distance D1 is shown in FIG. 20. Correspondingly, the connecting boss 21b abuts against the upper surface 411b of the first contact portion 41b, and the first clamping surface 2421b can abut against the lower surface 412b of the first contact portion 41b, so as to relatively lock the first contact portion 41b and the connecting piece 2b in the vertical direction. The first buckle structure 24b cooperates with the first annular limiting edge 221b, so as to prevent the first contact portion 41b from being separated from the connecting piece 2b. Specifically, the first connecting arm 241b can be a cantilever structure connected to the connecting main body 23b, which can be elastically deformed under external force, facilitating the installation of the first contact portion 41b.

[0101] In order to make the installation between the pressure sensor 4b and the connecting piece 2b more balanced, the number of the first buckle structure 24b is at least two, and the at least two first buckle structures 24b are oppositely arranged with respect to the deformation portion 43b, which can be symmetrical or asymmetrical. For example, as shown in FIGS. 14 and 15, two first buckle structures 24b are arranged, and the two first buckle structures 24b are mirror-symmetrically arranged with respect to the deformation portion 43b or the extension line thereof. For another example, three first buckle structures 24b are arranged, two of which are mirror-symmetrically arranged with respect to the deformation portion 43b, and the remaining one is buckled to the side of the first contact portion 41b opposite to the deformation portion 43b (not shown in the drawings). It can be understood that when a plurality of first buckle structures 24b are arranged around the first contact portion 41b, the first annular limiting edge 221b can not be arranged, and the plurality of first connecting arms 241b will collectively realize the function of the first annular limiting edge 221b.

[0102] Of course, the pressure sensor 4b and the connecting piece 2b can also adopt a fixed connection structure. For example, in other embodiments, the first contact portion 41b is fixed to the connecting boss 21b by means of bolts or glue.

[0103] Regarding the connection structure between the support 3b and the pressure sensor 4b, in some embodiments, referring to FIGS. 19 to 21, the support 3b comprises a support main body 31b and a second buckle structure 32b formed on the support main body 31b, and the support main body 31b and the second buckle structure 32b jointly clamp the second contact portion 42b.

[0104] Specifically, the second buckle structure 32b comprises a second connecting arm 321b and a second buckling portion 322b formed on the second connecting arm 321b, and the second connecting arm 321b, the second buckling portion 322b and the support main body 31b are integrally arranged. The second buckling portion 322b has a second clamping surface 3221b, the second contact portion 42b is located between the second clamping surface 3221b and the support main body 31b, and the distance D2 from the second clamping surface 3221b to the support main body 31b is greater than or equal to the thickness H2 of the second contact portion 42b, the thickness H2 is shown in FIG. 20, and the distance D2 is shown in FIG. 21. Correspondingly, the support main body 31b abuts against the lower surface 422b of the second contact portion 42b, and the second clamping surface 3221b can abut against the upper surface 421b of the second contact portion 42b, so as to relatively lock the second contact portion 42b and the connecting piece 2b in the vertical direction. Meanwhile, a second annular limiting edge 311b surrounding the second contact portion 42b can be arranged on the support main body 31b, and the second annular limiting edge 311b is used for positioning the second contact portion 42b, so as to facilitate correct installation of the pressure sensor 4b on the support 3b. The cooperation of the second buckle structure 32b and the second annular limiting edge 311b can prevent the second contact portion 42b from being separated from the support 3b. Specifically, the second connecting arm 321b can be a cantilever structure connected to the support main body 31b, and the cantilever structure can be elastically deformed under external force, so as to facilitate installation of the second contact portion 42b.

[0105] In order to make the installation between the pressure sensor 4b and the support 3b more balanced, the number of the second buckle structure 32b is at least two, and the at least two second buckle structures 32b are oppositely arranged with respect to the deformation portion 43b. The position distribution of the second buckle structure 32b can be arranged according to the position distribution of the first buckle structure 24b described above. It can be understood that when a plurality of second buckle structures 32b are arranged around the second contact portion 42b, the second annular limiting edge 311b can not be arranged, and the plurality of second connecting arms 321b will collectively realize the function of the second annular limiting edge 311b.

[0106] Further, the second buckle structure 32b is arranged in the gap between the first contact portion 41b and the second contact portion 42b, the thickness of the second buckle structure 32b is less than the width of the gap, so as to avoid interference of the second buckle structure 32b with the mutual movement between the first contact portion 41b and the second contact portion 42b, and affect the detection accuracy of the pressure sensor 4b.

[0107] In addition to the second clamping structure 32b, the second contact portion 42b can also be locked on the support body 31b by means of a bolt or glue, that is, an abutting column 312b can be arranged on the support body 31b, as shown in FIGS. 20 and 21, the second contact portion 42b abuts against the abutting column 312b, and a bolt is used to penetrate the second contact portion 42b and be screwed to the abutting column 312b, so that the aforementioned distance is actually the distance from the second clamping surface 3221b to the abutting column 312b.

[0108] In other embodiments, the second clamping structure 32b and the second annular limiting edge 311b can also be omitted, and the second contact portion 42b can be directly fixed to the support 3b by means of a bolt.

[0109] In some embodiments, the connecting piece 2b is detachably connected to the ladder foot 11b, for example, by means of a bolt connection, a clamping connection, or adhesion, or is in a tubular shape and directly sleeved on the ladder foot 11b, and the purpose is also to facilitate maintenance and replacement of old parts. Of course, in other embodiments, the connecting piece 2b and the ladder foot 11b can also be integrally formed, that is, the connecting boss 21b is directly formed on the ladder foot 11b, and the pressure sensor 4b is installed on the ladder foot 11b, thereby saving the installation steps.

[0110] In some embodiments, the intelligent ladder further comprises a shell 8b, which is sleeved on the ladder foot 11b, and the connecting piece 2b is connected to the shell 8b. Preferably, the connecting piece 2b and the shell 8b are integrally formed, and are formed of a plastic material. In another embodiment, the connecting piece 2b is detachably connected to the shell 8b, and the connecting piece 2b is indirectly connected to the ladder foot 11b through the shell 8b, that is, the connecting piece 2b is fixed to the bottom surface of the shell 8b by means of a bolt.

[0111] In some embodiments, as shown in FIGS. 12 and 13, the intelligent ladder further comprises a shielding piece 5b, which is connected to the connecting piece 2b or the ladder foot 11b, and cooperates with the connecting piece 2b or the ladder foot 11b to collectively surround the pressure sensor 4b. The shielding piece 5b is provided with a through exposure opening 51b, so that the support 3b can be extended to the outside from the exposure opening 51b. For example, in an embodiment, the connecting piece 2b is internally provided with an accommodating cavity 201b for accommodating the pressure sensor 4b, and the accommodating cavity 201b is formed with an opening at the bottom, and the shielding piece 5b is mounted on the connecting piece 2b and covers the opening, and the support 3b is extended below the shielding piece 5b from the exposure opening 51b.

[0112] The shielding member 5b can play a protective role, for example, to prevent the pressure sensor 4b from being exposed to the outside world; in addition, the shielding member 5b can play an aesthetic role. The shielding member 5b corresponds to the extension of the ladder leg 11b or the connecting member 2b, and is still only supported by the support member 3b.

[0113] In some embodiments, referring to Figure 11, the intelligent ladder further comprises a warning module 6b installed on the ladder frame 1b, and the warning module 6b is electrically connected with the pressure sensor 4b. The warning module 6b includes a display unit, a buzzer unit, a light-emitting unit, a voice unit, etc., which can be used to present the load information of the ladder frame 1b to the user, and issue an alarm when the load of the ladder frame 1b exceeds the preset warning value, etc. Of course, the display unit can also display other information, such as time, temperature, humidity, etc.

[0114] Regarding the warning function of the warning module 6b, it can specifically be the sound change of the buzzer unit, the light change of the light-emitting unit, or the voice prompt, etc. The buzzer unit does not work when the load of the ladder frame 1b is within the safe range, and different buzzer sounds can be set for the case where the load of the ladder frame 1b approaches the preset warning value and the case where the load of the ladder frame 1b exceeds the preset warning value.

[0115] Similarly, the light change of the light-emitting unit, the light-emitting unit does not emit light when the load of the ladder frame 1b is within the safe range, and different lights can be set for the case where the load of the ladder frame 1b approaches the preset warning value and the case where the load of the ladder frame 1b exceeds the preset warning value, so as to remind the user to pay attention to safety in real time.

[0116] The voice unit can set different voice reminders for the case where the load of the ladder frame 1b approaches the preset warning value and the case where the load of the ladder frame 1b exceeds the preset warning value.

[0117] In addition, a handrail 12b is provided at the top of the ladder frame 1b, which can be used by the user to carry the intelligent ladder, or the user can use the handrail 12b to stabilize the body when climbing the intelligent ladder. Preferably, the warning module 6b is installed at the handrail 12b, and the height of the ladder frame 1b is set to a height of 1.5 meters to 2.5 meters. Therefore, when the user gets on the intelligent ladder, it is easier to see the content on the display unit.

[0118] In some embodiments, as shown in Figure 16, the warning module 6b is electrically connected with the pressure sensor 4b through a wire 7b, and the inside of the ladder frame 1b is hollow and forms a wire passage 130b, the wire passage 130b penetrates to the ladder leg 11b, and the wire 7b is distributed in the wire passage 130b. In addition, the wire 7b is also connected to the pressure sensor 4b after passing through the connecting member 2b. The wire passage 130b accommodates the wire 7b, mainly plays an aesthetic role, and prevents the wire 7b from being exposed to the outside world.

[0119] Referring to FIGS. 22 to 30, the present application further provides a smart ladder, which comprises a ladder frame 1c, a pressure sensor 2c and a warning module 3c. The bottom of the ladder frame 1c is provided with a ladder leg 11c, and the pressure sensor 2c is installed at the ladder leg 11c. The warning module 3c is installed on the ladder frame 1c and electrically connected with the pressure sensor 2c. Therefore, the warning module 3c can know the load condition of the ladder frame 1c through the detection result of the pressure sensor 2c and give a warning to the user according to the load condition of the ladder frame 1c.

[0120] As shown in FIGS. 22 to 25, the ladder frame 1c is composed of a plurality of rod bodies 12c and a plurality of steps 13c. The plurality of rod bodies 12c includes at least four support rods 121c. At least two support rods 121c form a main frame body 14c, and at least two support rods 121c form a sub-frame body 15c. The plurality of steps 13c are installed on the main frame body 14c, and the sub-frame body 15c is rotatably installed on the main frame body 14c. The rotation of the sub-frame body 15c corresponds to the folding or unfolding of the frame body. The bottom of each support rod 121c forms a ladder leg 11c. Preferably, a pressure sensor 2c is installed at each ladder leg 11c. Of course, in other embodiments, a pressure sensor 2c can be installed at only one or two ladder legs 11c.

[0121] The plurality of rod bodies 12c further includes a handrail rod 122c, which is connected to the two support rods 121c forming the main frame body 14c and located at the top of the main frame body 14c, so that the main frame body 14c has an arch shape. The user can use the handrail rod 122c to carry the smart ladder, or use the handrail rod 122c to stabilize the body when climbing the smart ladder.

[0122] The plurality of rod bodies 12c further includes at least one stabilizing rod 123c, which is connected to the two support rods 121c forming the sub-frame body 15c. For example, a horizontal stabilizing rod 123c or two cross-distributed stabilizing rods 123c can be provided to strengthen the structure of the sub-frame body 15c. Alternatively, in addition to the two horizontal stabilizing rods 123c connecting the two support rods 121c of the sub-frame body 15c, two additional stabilizing rods 123c can be cross-distributed to form an "X" shape between the two horizontal stabilizing rods 123c, further strengthening the structure of the sub-frame body 15c.

[0123] In addition, several pedals 13c can be followed by linkage when the ladder stand 1c is folded or unfolded, specifically, each pedal 13c is rotatably installed on the support rod 121c constituting the main frame body 14c, and the linkage rod 124c is further included in the plurality of rod bodies 12c, the linkage rod 124c is rotatably connected with each pedal 13c, and the linkage rod 124c is arranged in parallel with the support rod 121c constituting the main frame body 14c, so that any one pedal 13c can drive the remaining pedals 13c to rotate. When the ladder stand 1c is unfolded, in order to fix the position of the pedal 13c, a clamping groove 131c is formed on the top pedal 13c, and a positioning rod 125c is installed on the auxiliary frame body 15c. When the positioning rod 125c is located in the clamping groove 131c, it means that the pedal 13c is in a horizontal state, that is, the ladder stand 1c is unfolded. Of course, the positioning rod 125c can also be used as one of the aforementioned stabilizing rods 123c.

[0124] Further, in order to make the load-bearing structure of the pedal 13c more stable, a plurality of cross rods 126c can be included in the plurality of rod bodies 12c, and the plurality of cross rods 126c are horizontally connected between the two support rods 121c constituting the main frame body 14c. The pedal 13c is hooked on the cross rod 126c and can rotate around the cross rod 126c, and a anti-disengagement mechanism is installed on the pedal 13c to prevent the pedal 13c from disengaging from the cross rod 126c.

[0125] Further, in order to make the folding and unfolding actions of the auxiliary frame body 15c and the rotation of the pedal 13c realize linkage, that is, by rotating one pedal 13c, the folding or unfolding action of the entire ladder stand 1c can be realized. In the preferred embodiment, a clamping hook 132c is rotatably installed on the top pedal 13c, the clamping hook 132c is hooked on the positioning rod 125c, and the connection point of the clamping hook 132c and the pedal 13c is close to the main frame body 14c. The clamping hook 132c is used to limit the position between the pedal 13c and the positioning rod 125c. When the pedal 13c is unfolded, the clamping hook 132c can drive the positioning rod 125c to move away from the main frame body 14c, that is, to make the auxiliary frame body 15c unfold; when the pedal 13c is folded, the clamping hook 132c can drive the positioning rod 125c to move close to the main frame body 14c, that is, to make the auxiliary frame body 15c fold.

[0126] In some embodiments, referring to FIGS. 22 and 26, the warning module 3c includes a mounting shell 31c and at least one functional unit 32c, the mounting shell 31c is installed on the ladder stand 1c, and the at least one functional unit 32c is installed on the mounting shell 31c. The functional unit 32c is used to provide warning information.

[0127] The mounting shell 31c can be mounted on any of the aforementioned rod bodies 12c or the footboard 13c, such as being mounted on the support rod 121c constituting the main frame body 14c, or being mounted on the footboard 13c, or being mounted on the armrest rod 122c. The mounting shell 31c can adopt a fixed mounting structure, such as bolt fixation, welding fixation, etc., or a detachable mounting structure, such as magnetic attraction, clamping, elastic clamping, etc.

[0128] For ease of description, the following describes an embodiment in which the mounting shell 31c is mounted on the armrest rod 122c, as shown in FIG. 22.

[0129] Preferably, the height of the ladder frame 1c is set to a height of 1.0-3.0 meters, so that the user is more likely to notice the warning information issued by the functional unit 32c when climbing the intelligent ladder.

[0130] Specifically, referring to FIGS. 26-28, the mounting shell 31c includes a first shell 311c and a second shell 312c, the first shell 311c and the second shell 312c are clamped and fixed together on the armrest rod 122c, and at least one functional unit 32c is mounted on at least one of the first shell 311c or the second shell 312c. In some embodiments, the first shell 311c and the second shell 312c are connected to form a cylindrical mounting shell 31c, so that the mounting shell 31c is connected to the armrest rod 122c in a sleeved manner.

[0131] Further, at least one mounting hole 101c is formed through the armrest rod 122c, and the mounting shell 31c further includes at least one mounting portion 313c, the at least one mounting portion 313c passes through the mounting hole 101c, so that the first shell 311c and the second shell 312c are fixedly connected through the mounting portion 313c.

[0132] Specifically, the mounting portion 313c includes a first connecting column 3131c, a second connecting column 3132c, and a locking member 3133c, the first connecting column 3131c is integrally formed on the first shell 311c, the second connecting column 3132c is integrally formed on the second shell 312c, the first connecting column 3131c and the second connecting column 3132c are respectively inserted from both ends of the mounting hole 101c, and the locking member 3133c is a bolt, which is threadedly connected to the first connecting column 3131c after passing through the second connecting column 3132c. Of course, the bolt can also pass through the first connecting column 3131c and be threadedly connected to the second connecting column 3132c. Therefore, the mounting shell 31c can be fixed on the armrest rod 122c by using the mounting portion 313c, and the mounting shell 31c can be prevented from rotating relative to the armrest rod 122c.

[0133] In some embodiments, the first shell 311c comprises a first body part 3111c and a first extension part 3112c, the second shell 312c comprises a second body part 3121c and a second extension part 3122c, the first body part 3111c and the second body part 3121c are connected through the at least one mounting part 313c, the first extension part 3112c and the second extension part 3122c are connected through the at least one mounting part 313c, and the at least one functional unit 32c is arranged on the first body part 3111c or the second body part 3121c. The early warning module 3c further comprises a mounting sleeve 33c, the mounting sleeve 33c is sleeved on the first extension part 3112c and the second extension part 3122c, the mounting sleeve 33c is made of soft material, such as rubber, sponge, etc., which is convenient for the user to hold the position of the handrail rod 122c. At the same time, the mounting sleeve 33c can also play the role of auxiliary fixing the first shell 311c and the second shell 312c, that is, preventing the first shell 311c and the second shell 312c from being separated from each other.

[0134] As can be understood, as shown in FIG. 26, the first extension part 3112c can also be provided with two, and respectively located on both sides of the first body part 3111c; the second extension part 3122c can also be provided with two, and respectively located on both sides of the second body part 3121c. The mounting hole 101c is provided with four, and the mounting shell 31c comprises four mounting parts 313c, wherein two first connecting columns 3131c are respectively arranged on the two first extension parts 3112c, and the other two first connecting columns 3131c are arranged on the first body part 3111c. Correspondingly, two second connecting columns 3132c are arranged on the two second extension parts 3122c, and the other two second connecting columns 3132c are arranged on the second body part 3121c.

[0135] Of course, in other embodiments, the first shell 311c and the second shell 312c can also be fixed on the handrail rod 122c without being locked by bolts. Specifically, in this other embodiment, the mounting part 313c also comprises the first connecting column 3131c, the second connecting column 3132c and the locking piece 3133c, but at this time the locking piece 3133c is a magnet, and the first connecting column 3131c and the second connecting column 3132c are connected by magnetic attraction. At this time, the first connecting column 3131c and the second connecting column 3132c prevent the mounting shell 31c from rotating relative to the handrail rod 122c. A mounting sleeve 33c is further arranged, which is sleeved on the first extension part 3112c and the second extension part 3122c, so as to prevent the first shell 311c and the second shell 312c from being separated from each other, and realize the fixation of the mounting shell 31c on the handrail rod 122c. This other embodiment is not shown in the drawings.

[0136] In some embodiments, referring to Figs. 25, 28 and 29, a groove is formed on the outer surface of the mounting shell 31c, and a protruding buffer 314c is arranged in the groove. The buffer 314c is flexible, for example, the buffer 314c is arranged on the outer surface of the second shell 312c. Further, at least part of the buffer 314c is bonded in the groove to prevent the buffer 314c from falling off. When the ladder stand 1c is folded for storage, the handrail rod 122c can be leaned against a wall. At this time, the buffer 314c is used to abut against the wall to protect the mounting shell 31c and the functional units 32c thereon from being damaged. In other embodiments, the mounting shell 31c can not be provided with a groove, and the flexible buffer 314c can be fixed on the outer surface of the mounting shell 31c by bonding.

[0137] In some embodiments, referring to Figs. 27 to 29, the warning module 3c further comprises a control board 34c, a power supply device 35c and a charging device 36c. The control board 34c can be a PCBL circuit board, the power supply device 35c can be a storage battery, and the charging device 36c can be an electrical connection interface. The control board 34c, the power supply device 35c and the charging device 36c are arranged in the mounting shell 31c. For example, in some embodiments, the control board 34c is fixed on the first shell 311c by bolts, and the power supply device 35c and the charging device 36c are fixed on the second shell 312c by bolts.

[0138] The power supply hole 102c is formed on the ladder stand 1c, and the power supply device 35c is located in the power supply hole 102c to prevent the power supply device 35c from being exposed to the outside. The control board 34c is electrically connected to the power supply device 35c, the charging device 36c and the pressure sensor 2c. At least one functional unit 32c is mounted on the control board 34c, and preferably all the functional units 32c are integrally arranged on the control board 34c. The power supply device 35c enables the intelligent ladder to have a built-in power supply, thereby improving the portability of the intelligent ladder. The charging device 36c can be connected to an external power supply for charging the power supply device 35c.

[0139] Further, a plurality of connection terminals 341c are arranged on the control board 34c. The number of the connection terminals 341c is the same as the sum of the number of the power supply devices 35c, the number of the charging devices 36c and the number of the pressure sensors 2c. That is, each power supply device 35c, each charging device 36c and each pressure sensor 2c is electrically connected to a corresponding connection terminal 341c. The purpose of this arrangement is to facilitate the maintenance and replacement of the power supply device 35c, the charging device 36c and the pressure sensor 2c.

[0140] It can be understood that the mounting hole 101c and the power supply hole 102c are actually formed on the rod body 12c or the pedal 13c to which the mounting shell 31c is mounted, and are not limited to being formed only on the handrail rod 122c.

[0141] In some embodiments, referring to FIGS. 24 and 29, the rod body 12c is hollow and forms a wire passage 120c, the early warning module 3c is electrically connected to the pressure sensor 2c through a wire 4c, and the wire 4c is at least partially accommodated in the wire passage 120c. Correspondingly, the wire passage 120c is formed in the support rod 121c and the handrail rod 122c, and is connected to the ladder leg 11c. For example, as shown in FIG. 23, the main frame 14c has two ladder legs 11c, and the auxiliary frame 15c also has two ladder legs 11c, and one pressure sensor 2c is mounted at each ladder leg 11c. At this time, the wire 4c electrically connecting the pressure sensor 2c on the auxiliary frame 15c and the early warning module 3c is only partially exposed at the connection between the main frame 14c and the auxiliary frame 15c, which can avoid damage to the wire 4c during repeated unfolding and folding of the auxiliary frame 15c and the main frame 14c. Further, a protective sleeve can be provided at the connection between the main frame 14c and the auxiliary frame 15c, and is sleeved around the outer periphery of the exposed part of the wire 4c to prevent damage to the exposed part of the wire 4c.

[0142] In a preferred embodiment, as shown in FIG. 30, the wire 4c is entirely accommodated in the wire passage 120c. Compared with the previous embodiment, the rotation structure of the main frame 14c and the auxiliary frame 15c is improved, and a concentric sleeve structure is used for connection, so that the wire passage 120c in the auxiliary frame 15c can be connected to the wire passage 120c in the main frame 14c, thus allowing the wire 4c to be entirely accommodated in the wire passage 120c, which is more aesthetic and durable.

[0143] In addition, the mounting hole 101c and the power supply hole 102c are both connected to the wire passage 120c, which is equivalent to storing the power supply device 35c in the space of the wire passage 120c, and the volume of the mounting shell 31c does not need to be additionally increased.

[0144] In some embodiments, at least one functional unit 32c includes at least one of a display unit 321c, a buzzer unit 322c, a light-emitting unit 323c, a voice unit 324c, and a vibration unit 325c. Regarding the early warning function of the functional unit 32c, it can specifically be a change in the number of the display unit 321c, a change in the sound of the buzzer unit 322c, a change in the light of the light-emitting unit 323c, a voice prompt of the voice unit 324c, or a vibration change of the vibration unit 325c.

[0145] A window 315c is formed on the mounting shell 31c, for example, the window 315c is formed on the first shell 311c in some embodiments. The display unit 321c can be a digital display screen, which is located in the window 315c. The digital display screen can present the load information of the ladder stand 1c to the user in the form of digital images. Of course, the display unit 321c can also display other information, such as time, temperature, humidity, etc.

[0146] The buzzer does not work when the load of the ladder stand 1c is in the safe range. Different buzzer sounds can be set for the two cases of the load of the ladder stand 1c approaching the preset warning value and exceeding the preset warning value. And the alarm is sent when the load of the ladder stand 1c exceeds the preset warning value.

[0147] The light of the light-emitting unit 323c changes in the same way. The light-emitting unit 323c does not emit light when the load of the ladder stand 1c is in the safe range. Different lights can be set for the two cases of the load of the ladder stand 1c approaching the preset warning value and exceeding the preset warning value, so as to remind the user to pay attention to safety in real time.

[0148] The voice unit 324c can set different voice reminders for the two cases of the load of the ladder stand 1c approaching the preset warning value and exceeding the preset warning value.

[0149] The vibration unit 325c can be integrally arranged on the control panel 34c, or mounted on the inner surface of the mounting shell 31c, or mounted on the handrail rod 122c. If the vibration unit 325c is mounted on the inner surface of the mounting shell 31c or the handrail rod 122c, an additional connection terminal 341c can be additionally provided on the control panel 34c for electrically connecting the vibration unit 325c and the control panel 34c. The vibration unit 325c can set different vibration reminders for the two cases of the load of the ladder stand 1c approaching the preset warning value and exceeding the preset warning value.

[0150] Obviously, the above-described embodiments are only some of the embodiments of the present application, not all the embodiments, and the preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application. The present application can be implemented in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent replacements to some technical features. Any equivalent structure made by using the contents of the specification and drawings, directly or indirectly applied to other related technical fields, is also within the scope of the patent protection of the present application.

Claims

1. A smart ladder, characterized in that, Include: Ladder frame (1a); At least one pressure sensor (2a) is installed at the bottom of the ladder frame (1a), and the at least one pressure sensor (2a) is used to detect the gravity change of the ladder frame (1a); The display module (3a) is electrically connected or wirelessly connected with the at least one pressure sensor (2a), and the display module (3a) is used to display the gravity change of the ladder frame (1a).

2. The smart ladder of claim 1, wherein, The intelligent ladder also includes at least one force receiving member (4a) installed at the bottom of the ladder frame (1a), which is used to contact the ground and abut against the at least one pressure sensor (2a).

3. The smart ladder of claim 2, wherein, The force receiving member (4a) includes a contact member (41a) and a bearing column (42a), the contact member (41a) is installed at the bottom of the ladder frame (1a), the contact member (41a) is used to contact the ground, the contact member (41a) can be elastically deformed, the bearing column (42a) is inserted into the contact member (41a), the bearing column (42a) abuts against the bottom of the at least one pressure sensor (2a), and the bearing column (42a) can fluctuate up and down with the elastic deformation of the contact member (41a).

4. The smart ladder of claim 3, wherein, The bottom of the ladder frame (1a) is provided with a mounting groove (11a), the pressure sensor (2a) is embedded in the mounting groove (11a), the contact member (41a) covers the mounting groove (11a), and the contact member (41a) abuts against the bottom of the at least one pressure sensor (2a).

5. The smart ladder of claim 3, wherein, The bottom of the ladder frame (1a) is provided with a first connecting portion (12a), the periphery of the contact member (41a) is provided with a second connecting portion (411a), and the first connecting portion (12a) and the second connecting portion (411a) are fixedly connected by bolts.

6. The smart ladder of claim 3, wherein, The bottom of the contact member (41a) is provided with a contact boss (412a), the bottom surface of the contact boss (412a) is designed in a circular arc shape, and the bearing column (42a) extends into the contact boss (412a).

7. The smart ladder of claim 1, wherein, The display module (3a) is also provided with a sound unit.

8. The smart ladder of claim 1, wherein, The bottom of the ladder frame (1a) is provided with at least three supporting legs (13a), and the pressure sensor (2a) is installed at the bottom of any supporting leg (13a).

9. The smart ladder of claim 8, wherein, The number of pressure sensors (2a) is the same as the number of supporting legs (13a), and a pressure sensor (2a) is installed at the bottom of each supporting leg (13a).

10. The smart ladder of claim 4, wherein, The display module (3a) can be detachably installed on the ladder frame (1a), the inside of the ladder frame (1a) is provided with a wire passage (14a), the wire passage (14a) extends downward from the top of the ladder frame (1a) and is connected to the mounting groove (11a), the pressure sensor (2a) is electrically connected with the display module (3a) through a wire (5a), and the wire (5a) passes through the wire passage (14a).

11. A smart ladder characterized by, Include: The ladder frame (1b) is provided with a ladder foot (11b) at the bottom; A connecting piece (2b) is arranged on the ladder foot (11b), and a connecting boss (21b) is arranged on the connecting piece (2b); A support piece (3b) is arranged for abutting the ground; A pressure sensor (4b) comprises a first contact part (41b), a second contact part (42b) and a deformation part (43b), the first contact part (41b) and the second contact part (42b) are connected through the deformation part (43b), the connecting boss (21b) is connected with or abuts against the first contact part (41b), the support piece (3b) is connected with or abuts against the second contact part (42b), and the connecting boss (21b) can drive the first contact part (41b) to move relative to the second contact part (42b) under external force, so that the deformation part (43b) is deformed.

12. The smart ladder of claim 11, wherein, The projections of the first contact part (41b) and the second contact part (42b) in the vertical direction do not intersect each other.

13. The smart ladder of claim 11, wherein, The first contact part (41b) is arranged around the second contact part (42b), or the second contact part (42b) is arranged around the first contact part (41b).

14. The smart ladder of claim 11, wherein, A buffer space (202b) is arranged on the connecting piece (2b), and the second contact part (42b) can move in the buffer space (202b).

15. The smart ladder of claim 14, wherein, The first contact part (41b) is arranged around the second contact part (42b); A receiving cavity (201b) for accommodating the pressure sensor (4b) is arranged on the connecting piece (2b), a connecting column (22b) is arranged in the receiving cavity (201b), and the connecting boss (21b) is arranged on the connecting column (22b); The connecting column (22b) is hollow to form the buffer space (202b), and a through groove (203b) is further formed in the connecting column (22b) to communicate the buffer space (202b) and the receiving cavity (201b), and the deformation part (43b) passes through the through groove (203b).

16. The smart ladder of claim 15, wherein, A first annular limiting edge (221b) is arranged on the connecting column (22b) and surrounds the first contact part (41b).

17. The smart ladder of claim 11, wherein, The pressure sensor (4b) is located between the connecting piece (2b) and the support piece (3b), the connecting boss (21b) is connected to or abuts against the upper surface (411b) of the first contact part (41b), and the support piece (3b) is connected to or abuts against the lower surface (422b) of the second contact part (42b).

18. The smart ladder of claim 11, wherein, The connecting piece (2b) comprises a connecting body (23b) and a first buckle structure (24b) formed on the connecting body (23b), the connecting boss (21b) is formed on the connecting body (23b), and the first buckle structure (24b) and the connecting boss (21b) jointly clamp the first contact part (41b).

19. The smart ladder of claim 18, wherein, The first buckle structure (24b) comprises a first connecting arm (241b) connected to the connecting body (23b) and a first buckling part (242b) formed on the first connecting arm (241b), and the first buckling part (242b) has a first clamping surface (2421b), the first contact part (41b) is located between the first clamping surface (2421b) and the connecting boss (21b), and the distance from the first clamping surface (2421b) to the connecting boss (21b) is greater than or equal to the thickness of the first contact part (41b).

20. The smart ladder of claim 18, wherein, The number of the first buckle structure (24b) is at least two, and at least two first buckle structures (24b) are oppositely arranged relative to the deformation part (43b).

21. The smart ladder of claim 11, wherein, The support piece (3b) comprises a support body (31b) and a second buckle structure (32b) formed on the support body (31b), and the support body (31b) and the second buckle structure (32b) jointly clamp the second contact part (42b).

22. The smart ladder of claim 21, wherein, The second buckle structure (32b) comprises a second connecting arm (321b) connected to the support body (31b) and a second buckling part (322b) formed on the second connecting arm (321b), and the second buckling part (322b) has a second clamping surface (3221b), the second contact part (42b) is located between the second clamping surface (3221b) and the support body (31b), and the distance from the second clamping surface (3221b) to the support body (31b) is greater than or equal to the thickness of the second contact part (42b).

23. The smart ladder of claim 21, wherein, The number of the second buckle structure (32b) is at least two, and at least two second buckle structures (32b) are oppositely arranged relative to the deformation part (43b).

24. The smart ladder of claim 21, wherein, The support body (31b) is further provided with a second annular limiting edge (311b) arranged around the second contact part (42b).

25. The smart ladder of claim 11, wherein, The support piece (3b) is fixedly connected to the second contact part (42b) by bolts.

26. The smart ladder of claim 11, wherein, The connecting piece (2b) is detachably installed at the ladder foot (11b).

27. The smart ladder of claim 11, wherein, The connecting piece (2b) and the ladder foot (11b) are integrally formed.

28. The smart ladder of claim 11, wherein, Further comprising a shielding piece (5b) connected to the connecting piece (2b) or the ladder foot (11b), the shielding piece (5b) cooperates with the connecting piece (2b) or the ladder foot (11b) to jointly surround the pressure sensor (4b), and a through exposure opening (51b) is formed in the shielding piece (5b) for the support piece (3b) to pass through.

29. The smart ladder of claim 11, wherein, Further comprising a warning module (6b) installed on the ladder frame (1b), and the warning module (6b) is electrically connected to the pressure sensor (4b).

30. The smart ladder of claim 29, wherein, The ladder frame (1b) is provided with a handrail (12b) at the top, and the warning module (6b) is installed at the handrail (12b).

31. The smart ladder of claim 29, wherein, The early warning module (6b) is electrically connected with the pressure sensor (4b) through a wire (7b), the ladder frame (1b) is internally hollow and forms a wire passage (130b), the wire passage (130b) penetrates to the ladder leg (11b), and the wire (7b) is distributed in the wire passage (130b).

32. The smart ladder of claim 11, wherein, The ladder frame (1b) comprises at least two support rods (13b) and a pedal (14b) connected with the at least two support rods (13b), the bottom of the support rod (13b) forms the ladder leg (11b), and the pedal (14b) is provided with anti-skid lines.

33. A smart ladder, characterized by Comprise: A ladder frame (1c) provided with a ladder leg (11c) at the bottom; A pressure sensor (2c) installed at the ladder leg (11c); An early warning module (3c) installed on the ladder frame (1c) and electrically connected with the pressure sensor (2c).

34. The smart ladder of claim 33, wherein, The early warning module (3c) comprises an installation shell (31c) and at least one functional unit (32c), the installation shell (31c) is installed on the ladder frame (1c), and at least one functional unit (32c) is installed on the installation shell (31c), and the functional unit (32c) is used for providing early warning information.

35. The smart ladder of claim 34, wherein, The installation shell (31c) comprises a first shell (311c) and a second shell (312c), the first shell (311c) and the second shell (312c) are clamped together on the ladder frame (1c), and at least one functional unit (32c) is installed on at least one of the first shell (311c) or the second shell (312c).

36. The smart ladder of claim 35, wherein, At least one installation hole (101c) is formed in the ladder frame (1c), the installation shell (31c) further comprises at least one installation part (313c), at least one installation part (313c) penetrates through the installation hole (101c), and the first shell (311c) and the second shell (312c) are fixedly connected through the installation part (313c).

37. The smart ladder of claim 36, wherein, The installation part (313c) comprises a first connecting column (3131c), a second connecting column (3132c) and a locking piece (3133c), the first connecting column (3131c) is arranged on the first shell (311c), the second connecting column (3132c) is arranged on the second shell (312c), the first connecting column (3131c) and the second connecting column (3132c) are respectively inserted from both ends of the installation hole (101c), and the locking piece (3133c) connects the first connecting column (3131c) and the second connecting column (3132c).

38. The smart ladder of claim 35, wherein, The first shell (311c) comprises a first main body (3111c) and a first extension (3112c), the second shell (312c) comprises a second main body (3121c) and a second extension (3122c), the first main body (3111c) and the second main body (3121c) are correspondingly connected, the first extension (3112c) and the second extension (3122c) are correspondingly connected, and at least one of the functional units (32c) is arranged on the first main body (3111c) or the second main body (3121c); The early warning module (3c) further comprises a mounting sleeve (33c), and the mounting sleeve (33c) surrounds the first extension (3112c) and the second extension (3122c).

39. The smart ladder of claim 38, wherein, The mounting sleeve (33c) is made of soft material.

40. The smart ladder of claim 34, wherein, The ladder frame (1c) is composed of a plurality of rod bodies (12c), the first shell (311c) and the second shell (312c) are connected to form a cylindrical mounting shell (31c), and the mounting shell (31c) is sleeved on one of the rod bodies (12c).

41. The smart ladder of claim 40, wherein, Among the plurality of rod bodies (12c), at least two support rods (121c) and handrail rods (122c) are included, the ladder legs (11c) are formed at the bottom of the support rods (121c), the handrail rods (122c) are connected to two of the support rods (121c), and the mounting shell (31c) is sleeved on the handrail rods (122c).

42. The smart ladder of claim 40, wherein, The rod body (12c) is hollow and forms a wire passage (120c), the early warning module (3c) is electrically connected to the pressure sensor (2c) through a wire (4c), and the wire (4c) is at least partially accommodated in the wire passage (120c).

43. The smart ladder of claim 42, wherein, The wire (4c) is entirely accommodated in the wire passage (120c).

44. The smart ladder of claim 34, wherein, The mounting shell (31c) is provided with a protruding buffer portion (314c), and the buffer portion (314c) is flexible.

45. The smart ladder of claim 34, wherein, The early warning module (3c) further comprises a control board (34c), a power supply device (35c), and a charging device (36c), the control board (34c), the power supply device (35c), and the charging device (36c) are arranged in the mounting shell (31c), the control board (34c) is electrically connected to the power supply device (35c), the charging device (36c), and the pressure sensor (2c), and at least one of the functional units (32c) is mounted on the control board (34c).

46. The smart ladder of claim 45, wherein, The control board (34c) is provided with a plurality of connection terminals (341c), the number of the connection terminals (341c) corresponds to the sum of the number of the power supply device (35c), the charging device (36c), and the pressure sensor (2c), and the power supply device (35c), the charging device (36c), and the pressure sensor (2c) are electrically connected to the corresponding connection terminals (341c).

47. The smart ladder of claim 34, wherein, At least one of the function units (32c) comprises at least one of a display unit (321c), a buzzer unit (322c), a light-emitting unit (323c), a voice unit (324c) and a vibration unit (325c).

48. The smart ladder of claim 34, wherein, At least one of the function units (32c) comprises a display unit (321c), and a window (315c) is formed on the mounting shell (31c), and the display unit (321c) is arranged in the window (315c).

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