Telescopic support and lighting device

Abstract

The application provides a telescopic support and a lighting device. The telescopic support comprises a base and a telescopic mechanism. The base comprises a base body and a detector arranged on the base body. The telescopic mechanism comprises a telescopic assembly and a first transmission assembly. The telescopic assembly comprises a first support rod and a second support rod. The first support rod is movably connected to the base body, and the second support rod is movably connected to the first support rod. The telescopic assembly can be deformed in a telescopic manner. The first transmission assembly comprises a first fixed pulley and a first rope. The first fixed pulley is connected to the first support rod. The first rope is wound around the first fixed pulley and connected to the second support rod and the detector at two ends, respectively. The detector can detect the tension of the first rope and send a trigger signal when the tension of the first rope exceeds a preset range. The telescopic support can realize accurate fault detection based on the change of the rope tension by arranging the detector. The telescopic support can identify abnormal conditions of the telescopic assembly in real time, thereby improving the service life and safety.

Description

Technical Field

[0001] This application belongs to the field of lighting technology, and in particular relates to a telescopic bracket and a lighting device. Background Technology

[0002] In numerous fields such as industrial production, engineering construction, and emergency rescue, lighting devices, as key equipment ensuring the brightness of the working environment, are facing ever-expanding usage demands and scenarios, placing higher requirements on the flexibility, safety, and reliability of these devices. One widely used type of lighting device primarily consists of a telescopic bracket and a lighting lamp. The lamp is mounted on top of the telescopic bracket to achieve wide-area lighting coverage. The telescopic bracket is extendable and deformable, allowing for flexible adjustment of the lamp's height to meet the diverse lighting height requirements of different work scenarios. This structure is widely used in various scenarios requiring dynamic adjustment of lighting height due to its ease of operation and high adjustment efficiency.

[0003] However, in actual use, when the telescopic support extends or retracts, it may encounter external obstacles, such as the operator's arm, pipelines at the work site, equipment parts, building structure protrusions, etc., which will hinder the normal extension and retraction of the telescopic support. This situation will cause the driving force driving the telescopic support to act continuously on the telescopic support, and the continuous abnormal external force can easily cause structural damage to the telescopic support, such as local bending of the telescopic support, breakage of connection parts, etc., which seriously affects the normal use of the lighting device, and may even cause the lighting lamp to fall, causing a safety accident. Utility Model Content

[0004] The purpose of this application is to provide a telescopic bracket and a lighting device, which aims to solve the technical problem that the telescopic bracket will be damaged when it encounters an obstacle during the telescopic adjustment process in the current related technology.

[0005] The embodiments of this application are implemented as follows: Firstly, a telescopic bracket is provided, including a base and a telescopic mechanism;

[0006] The base includes a base body and a detector disposed on the base body;

[0007] The telescopic mechanism includes a telescopic component and a first transmission component. The telescopic component includes a first support rod and a second support rod. The first support rod is movably connected to the base body, and the second support rod is movably connected to the first support rod. The telescopic component is capable of telescopic deformation. The first transmission component includes a first fixed pulley and a first rope. The first fixed pulley is connected to the first support rod, and the first rope is wrapped around the first fixed pulley. Both ends are respectively connected to the second support rod and the detector. The detector is capable of detecting the tension of the first rope and can send a trigger signal when the tension of the first rope exceeds a preset range.

[0008] In one embodiment of the first aspect, the telescopic assembly further includes a driving member connected to the base and the first support rod, and used to drive the first support rod to move closer to or away from the base body, so that the telescopic assembly can telescopically deform.

[0009] In one embodiment of the first aspect, the seat body includes a base plate and a bottom sleeve disposed on the base plate, and the first support rod is slidably connected to the bottom sleeve along the support direction.

[0010] In one embodiment of the first aspect, the second support rod is slidably connected to the second support rod along the support direction.

[0011] As one embodiment of the first aspect, the base further includes a bottom fixed pulley disposed on the base body, the first rope is wrapped around the bottom fixed pulley, and the detector is disposed outside the bottom sleeve.

[0012] In one embodiment of the first aspect, the detector includes a pressure sensor for detecting the tension in the first rope.

[0013] In one embodiment of the first aspect, the detector includes an elastic element and a micro-motion limit switch. The first rope is connected to the elastic element and can drive the elastic element to undergo elastic deformation under tension. When the tension of the first rope exceeds a preset range, the elastic element triggers the micro-motion limit switch, so that the micro-motion limit switch sends the trigger signal.

[0014] In one embodiment of the first aspect, the telescopic mechanism further includes a controller connected to the base and communicatively connected to the detector, the controller being able to control the drive component to stop after receiving the trigger signal.

[0015] In one embodiment of the first aspect, the telescopic assembly further includes a third support rod...the Nth support rod connected in sequence, the third support rod being movably connected to the second support rod, and the telescopic mechanism further includes a second transmission assembly...the (N-1)th transmission assembly, the Mth transmission assembly including an Mth fixed pulley and an Mth rope, where M is greater than or equal to 2 and less than or equal to N-1, the Mth fixed pulley being connected to the Mth support rod, the Mth rope being wrapped around the Mth fixed pulley, and both ends being connected to the (M-1)th support rod and the M+1th support rod, respectively.

[0016] In a second aspect, a lighting device is provided, including a lighting lamp and a telescopic bracket as described in any of the above embodiments, wherein the lighting lamp is connected to the end of the telescopic assembly remote from the base.

[0017] The technical advantages of this application embodiment compared to the prior art are as follows: Through the coordinated design of the telescopic component, the first transmission component, and the detector, on the one hand, by utilizing the transmission structure of the first fixed pulley and the first rope, the second support rod can move twice the distance of the first support rod, greatly improving the telescopic efficiency and supporting suspension at any height to meet the height adjustment needs of lighting in multiple scenarios. On the other hand, the detector achieves accurate fault detection based on the change of rope tension, and can identify abnormal situations such as the telescopic component being obstructed in extension (excessive tension) and obstructed in retraction (insufficient tension) in real time. By triggering a signal, it can promptly control the drive component to stop or trigger an alarm, effectively avoiding damage to the telescopic component and burnout of the drive component caused by continuous force, as well as personal safety accidents caused by obstructions during retraction. This significantly improves the service life and safety of the telescopic bracket, and reduces maintenance costs and accident risks. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application 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.

[0019] Figure 1 This is a front view of the telescopic bracket provided in the embodiment of this application;

[0020] Figure 2 yes Figure 1 A cross-sectional view of the telescopic bracket at point AA;

[0021] Figure 3 This is a partial three-dimensional structural diagram of the base in the telescopic bracket provided in the embodiment of this application;

[0022] Figure 4 This is a structural schematic diagram of the cooperation state between each transmission component and each support rod in the telescopic bracket provided in the embodiments of this application;

[0023] Figure 5 This is a schematic diagram of the structure of the telescopic bracket with a reverse transmission component provided in the embodiment of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. Telescopic bracket; 10. Base; 11. Seat body; 111. Base plate; 112. Bottom sleeve; 12. Detector; 13. Roller; 14. Support protrusion; 15. Bottom fixed pulley; 20. Telescopic mechanism; 21. Telescopic assembly; 211. First support rod; 212. Second support rod; 213. Third support rod; 214. Fourth support rod; 215. Fifth support rod; 22. First transmission assembly; 221. First fixed pulley; 2 22. First rope; 23. Drive unit; 23a. Electric push rod; 23a1. Output rod; 24. Second transmission assembly; 241. Second fixed pulley; 242. Second rope; 25. Third transmission assembly; 251. Third fixed pulley; 252. Third rope; 26. Fourth transmission assembly; 261. Fourth fixed pulley; 262. Fourth rope; 27. Reverse transmission assembly; 271. Reverse fixed pulley; 272. Reverse rope; 90. Lighting lamp. Detailed Implementation

[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0027] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0031] In many fields such as industrial production, engineering construction, and emergency rescue, lighting devices are key equipment for ensuring the brightness of the working environment. Their usage needs and scenarios are constantly expanding, which puts forward higher requirements for the flexibility, safety and reliability of the devices.

[0032] Please see Figure 1 This application provides a lighting device, which includes a telescopic bracket 100 and a lighting lamp 90. The lighting lamp 90 is connected to the telescopic bracket 100. The telescopic bracket 100 can be telescopically deformed to realize the raising and lowering of the lighting lamp 90, so as to meet the different needs of illumination height in different work scenarios. This structure has been widely used in various scenarios that require dynamic adjustment of lighting height due to its convenient operation and high adjustment efficiency.

[0033] However, in actual use, the telescopic adjustment function of this type of lighting device presents significant safety and equipment wear hazards, seriously affecting its performance and lifespan. This problem can be seen in the pressure changes during the extension and retraction process. Specifically, when the telescopic bracket extends, if it encounters external obstacles (such as pipelines, equipment components, or building protrusions at the work site) that hinder its normal extension, the bracket needs to overcome greater resistance to continue pushing, resulting in a significant increase in the tension value within the system compared to normal extension. Conversely, when the telescopic bracket retracts, if an obstacle (such as an operator's arm, tool, or cable) is accidentally inserted between the lighting fixture and the bracket, creating a clamping situation, the obstacle will exert a reverse supporting force on the retraction of the bracket, reducing the driving force and resulting in a significant decrease in the tension value within the system compared to normal retraction.

[0034] However, current telescopic supports for lighting devices are driven by ropes, but these supports lack resistance detection and automatic shutdown mechanisms based on pressure changes during extension and contraction. Even in cases of abnormal pressure, the drive mechanism that powers the telescopic support continues to output force. On one hand, in scenarios where extension is hindered and pressure increases, excessive pressure directly affects the telescopic support, causing structural damage such as localized bending and breakage at connections. In severe cases, this can even lead to the lamp falling and causing a safety accident. On the other hand, in scenarios where contraction is hindered and pressure decreases, although the pressure drops, the continuous contraction action of the drive mechanism intensifies the clamping force on obstacles, potentially causing personal injury to operators and wear on internal components due to uneven stress. Furthermore, regardless of whether the pressure increases or decreases, the drive mechanism remains in an abnormal operating state for extended periods, leading to overload operation. For example, increased pressure requires the driver to output power beyond its capacity, while decreased pressure can cause the rope to slack, slip, or become entangled. This not only increases maintenance costs and replacement frequency but also interrupts operations due to equipment failure, reducing work efficiency.

[0035] To resolve the above issues, please refer to [link / reference]. Figure 1 This application embodiment also provides a telescopic bracket 100, which can determine whether the telescopic process is obstructed by detecting the pressure value during the telescopic process, so as to capture abnormal states in the telescopic process in a timely manner and provide clear basis for subsequent operations.

[0036] In this embodiment, the telescopic bracket 100 includes a base 10 and a telescopic mechanism 20. The telescopic mechanism 20 is disposed on the base 10, which can be placed on the ground or installed on other structural components and provides stable support for the telescopic mechanism 20. The lighting lamp 90 is disposed on the telescopic mechanism 20, which can extend and retract to realize the raising and lowering of the lighting lamp 90.

[0037] The base 10 includes a base body 11 and a detector 12 disposed on the base body 11.

[0038] Please combine Figure 2 The telescopic mechanism 20 includes a telescopic component 21 and a first transmission component 22.

[0039] The telescopic assembly 21 includes a first support rod 211 and a second support rod 212. The first support rod 211 is movably connected to the base body 11, and the second support rod 212 is movably connected to the first support rod 211. The telescopic assembly 21 can extend and retract, and the direction of this extension and retraction can be vertical. The lighting lamp 90 can be installed on the top of the telescopic assembly 21. It is understood that the telescopic assembly 21 has an extended state and a retracted state. When the telescopic assembly 21 is in the extended state, both the first support rod 211 and the second support rod 212 are away from the base 10, and the second support rod 212 is away from the first support rod 211. When the telescopic assembly 21 is in the retracted state, both the first support rod 211 and the second support rod 212 are close to the base 10, and the second support rod 212 is close to the first support rod 211. The telescopic assembly 21 can switch between the extended and retracted states and can be suspended at any length to maintain the current height of the lighting lamp 90. The aforementioned movable connection methods include, but are not limited to, sliding connections and hinges. The movable connection between the first support rod 211 and the base 10, and the movable connection between the first support rod 211 and the second support rod 212, can be the same or different; no restriction is placed here, as long as the telescopic component 21 can be extended and retracted. The extension and retraction of the telescopic component 21 can be achieved through its own internal drive, electrically controlled, through an external drive component, or manually driven. The driving process of the aforementioned drive component can be automatically controlled by a controller, or manually controlled by the controller or drive component; no restriction is placed here. The hovering state of the aforementioned telescopic component 21 can be achieved through the locking function of the drive component (such as an electronic brake or mechanical locking structure), ensuring that the length of the telescopic component 21 remains unchanged when there is no external force intervention.

[0040] The first transmission assembly 22 includes a first fixed pulley 221 and a first rope 222. The first fixed pulley 221 is connected to the first support rod 211, and the first rope 222 is wrapped around the first fixed pulley 221. The first rope 222 has a first end and a second end. The first end can be connected to the second support rod 212, and the second end can be connected to the detector 12. When the telescopic assembly 21 needs to switch from the retracted state to the extended state, the first support rod 211 moves upward along the seat body 11. Since the first fixed pulley 221 is fixed to the first support rod 211, the first fixed pulley 221 moves upward synchronously with the first support rod 211. At this time, the first rope 222 wrapped around the first fixed pulley 221 slides relative to the first fixed pulley 221: since the first end of the first rope 222 is fixedly connected to the detector 12 on the seat body 11, and the second end is connected to the second support rod 212, when the first fixed pulley 221 moves upward, it will pull the second support rod 212 upward through rope transmission. Based on the transmission characteristics of the fixed pulley, the moving distance of the first rope 222 is twice the moving distance of the first fixed pulley 221. Therefore, the upward moving distance of the second support rod 212 is twice the moving distance of the first support rod 211, realizing the rapid extension of the telescopic assembly 21. When the telescopic assembly 21 needs to switch from the extended state to the retracted state, the first support rod 211 moves downward under the action of the driving member (internal or external driving member), the first fixed pulley 221 moves downward synchronously, the first rope 222 slides in the opposite direction under the gravity of the second support rod 212, and the second support rod 212 moves closer to the first support rod 211, completing the retraction of the telescopic assembly 21.

[0041] The detector 12 can detect the tension of the first rope 222 and send a trigger signal when the tension of the first rope 222 exceeds a preset range. This preset range can be a specific value, such as the standard tension value during normal elongation or contraction, or it can be a range interval, such as a fluctuation range of ±5% of the normal tension. When the preset range is a specific value, the detector 12 can send a trigger signal when the detected tension is not that value; when the preset range is a range interval, the detector 12 can send a trigger signal when the detected tension is less than the minimum value or greater than the maximum value of the range interval.

[0042] Specifically, the detector 12 is equipped with a detection unit and a control unit. The detection unit can detect the tension of the first rope 222, and the control unit can send a trigger signal when the tension of the first rope 222 exceeds a preset range. When the telescopic component 21 undergoes normal telescopic deformation, the tension value of the first rope 222 is within the preset range. The aforementioned normal telescopic deformation refers to the telescopic component 21 not being obstructed and not experiencing any internal malfunctions that would increase resistance.

[0043] The detection unit collects the tension value F of the first rope 222 in real time, the tension value F1 of the second support on the second end of the first rope 222 is downward, and the resistance value F2 is generated by the external component or the internal resistance of the telescopic component 21 due to relative motion. F = F1 + F2.

[0044] When the telescopic component 21 is operating normally, the control unit will store independent preset ranges for the extension and contraction processes respectively. The preset range for tension during extension may differ from the preset range during contraction. Since there is no resistance, F2 = 0, therefore F = F1. F1 remains within the preset range, and the control unit does not send a signal.

[0045] When the telescopic component 21 is obstructed during extension or becomes jammed internally, a downward resistance F2 (F2 > 0) is generated. At this time, the force balance becomes F' = F1 + F2. The detection unit detects a tension value F' greater than the preset maximum value, and the control unit determines this as an anomaly and immediately sends a trigger signal. When the telescopic component 21 is obstructed during retraction, an upward resistance F2 (F2 < 0) is generated, and the force balance becomes F' = F1 + F2. The detection unit detects a tension value F' less than the preset minimum value, and the control unit similarly determines this as an anomaly and sends a trigger signal. The trigger signal can be transmitted to the drive unit 23 (to control its shutdown) or an external alarm device (such as an audible and visual alarm) to achieve rapid fault response.

[0046] The telescopic bracket 100, through the coordinated design of the telescopic component 21, the first transmission component 22, and the detector 12, achieves several advantages. On the one hand, by utilizing the transmission structure of the first fixed pulley 221 and the first rope 222, the second support rod 212 can move twice the distance of the first support rod 211, significantly improving telescopic efficiency and supporting suspension at any height to meet the height adjustment needs of lighting fixtures in more than 90 scenarios. On the other hand, the detector 12 achieves accurate fault detection based on changes in rope tension, and can identify abnormal situations such as the telescopic component 21 being obstructed in extension (excessive tension) and obstructed in retraction (insufficient tension) in real time. By triggering a signal, it can promptly control the drive component 23 to stop or trigger an alarm, effectively avoiding damage to the telescopic component 21 and burnout of the drive component 23 due to continuous stress, as well as personal safety accidents caused by obstructions during retraction. This significantly improves the service life and safety of the device, and reduces maintenance costs and accident risks.

[0047] Please see Figure 2In some embodiments, the telescopic assembly 21 further includes a driving member 23, which is an internal driving member of the telescopic assembly 21. The driving member 23 is connected to the base 10 and the first support rod 211. The driving member 23 can be used to drive the first support rod 211 to move closer to or away from the base body 11 to achieve the telescopic deformation of the telescopic assembly 21. That is, the driving member 23 can drive the first support rod 211 away from the base body 11 to switch the telescopic assembly 21 to the extended state, and the driving member 23 can drive the first support rod 211 closer to the base body 11 to switch the telescopic assembly 21 to the retracted state. The integrated design of the driving member 23 avoids the problems of external driving members 23 requiring additional installation space and being susceptible to interference from the external environment, making the structure of the telescopic assembly 21 more compact, reducing external pipeline connections, and adapting to use in confined working spaces or complex environments. At the same time, the driving member 23 acts directly on the first support rod 211, making the transmission of driving force more direct and efficient, and effectively reducing power loss. When the drive unit 23 drives the first support rod 211 to move, if the extension of the telescopic component 21 is hindered (excessive tension) or the retraction is hindered (insufficient tension), the detector 12 can send a trigger signal in time to control the drive unit 23 to stop, so as to avoid the drive unit 23 from burning out due to overload operation, and at the same time prevent the telescopic component 21 from being damaged due to continuous force. It can also avoid safety accidents caused by clamping obstacles during retraction. It takes into account the flexibility of use, operation stability and safety reliability of the device, and reduces maintenance costs and accident risks.

[0048] Optionally, the driving component 23 can be an electric push rod 23a. The body of the electric push rod 23a is connected to the base 10, and the output rod 23a1 of the electric push rod 23a is connected to the top of the first support rod 211. During the up-and-down driving process, the output rod 23a1 of the electric push rod 23a can drive the first support rod 211 to move up and down, thereby realizing the telescopic deformation of the telescopic component 21.

[0049] In some embodiments, the telescopic mechanism 20 further includes a controller, which can be connected to the base 10 and communicate with the detector 12. The communication connection can be wired or wireless. The controller can receive a trigger signal and, upon receiving the trigger signal, control the drive component 23 to stop, thereby further enhancing the safety, reliability, and automation level of the device. It enables an instantaneous and rapid response upon receiving the trigger signal, avoiding the delay caused by manual intervention that could lead to continuous stress damage to the telescopic component 21 or overload burnout of the drive component 23. At the same time, it promptly terminates the clamping action when the contraction is obstructed, avoiding personal safety accidents. Compared with the manual shutdown mode without a controller, this significantly improves the timeliness and safety of risk handling.

[0050] Please see Figure 1 and Figure 2In some embodiments, the base body 11 includes a base plate 111 and a bottom sleeve 112 disposed on the base plate 111. A first support rod 211 is slidably connected to the bottom sleeve 112 along the support direction, and a second support rod 212 is slidably connected to the first support rod 211 along the support direction. The support direction is the up-down direction. The base plate 111 provides a more stable support foundation for the entire device, effectively distributing the weight of the telescopic component 21 and the force during operation, preventing the base 10 from tilting or displacing during the movement of the telescopic component 21. The sliding connection design between the bottom sleeve 112 and the first support rod 211, and between the first support rod 211 and the second support rod 212 along the support direction, defines a precise linear trajectory for the telescopic movement, completely avoiding the problem of radial offset of the support rod, greatly improving the stability and accuracy of the telescopic component 21 during telescopic movement, ensuring that the lighting lamp 90 remains stable during the lifting and lowering process, and avoiding the impact of shaking on the lighting effect. It should be noted that the bottom sleeve 112, the first support rod 211 and the second support rod 212 can be nested in sequence to achieve sliding, or they can be slid through a slide rail; there is no restriction here.

[0051] In other embodiments, the two ends of the first support rod 211 may be rotatably connected to the seat body 11 and the second support rod 212, respectively. The telescopic component 21 can achieve folding and retraction and unfolding and elongation through the rotation of the first support rod 211 and the second support rod 212. Of course, the connection between the first support rod 211 and the seat body 11 and the connection between the second support rod 212 and the first support rod 211 may be either rotatably connected or slidably connected; this is not a limitation.

[0052] Optionally, the bottom sleeve 112 has a sleeve hole, and the first support rod 211 is slidably fitted into the sleeve hole. The first support rod 211 has a first connecting hole, and the second support rod 212 is slidably fitted into the first connecting hole. A first fixed pulley 221 is installed at the top of the first support rod 211, and the second end of the first rope 222 is connected to the bottom of the second support rod 212. This maximizes the length of the first rope 222, thereby increasing the telescopic range of the telescopic assembly 21.

[0053] Please combine Figure 3 Optionally, two rollers 13 and a support protrusion 14 can be installed on the base plate 111. After the telescopic bracket 100 is placed in the correct position, the base 10 can be supported by the two rollers 13 and the support protrusion 14. When it is necessary to move the telescopic bracket 100, the two rollers 13 can be used as fulcrums to make the support protrusion 14 tilt upward so that the telescopic bracket 100 is supported only by the rollers 13.

[0054] Please see Figure 2In some embodiments, the base 10 further includes a bottom fixed pulley 15 disposed on the base body 11. Specifically, the bottom fixed pulley 15 may be a bottom sleeve 112 mounted on the base body 11. The first rope 222 is wrapped around the bottom fixed pulley 15, and the detector 12 is disposed outside the bottom sleeve 112. That is, the first end of the first rope 222 is located outside the bottom sleeve 112, and the first rope 222 extends from the outside of the bottom sleeve 112 into the bottom sleeve 112, and is wrapped around the bottom fixed pulley 15 and the first fixed pulley 221 in sequence, and is connected to the second support rod 212. The addition of the bottom fixed pulley 15 optimizes the transmission path of the first rope 222, can effectively change the force direction of the first rope 222, reduce the friction loss between the first rope 222 and the inner wall of the bottom sleeve 112, and at the same time, cooperates with the first fixed pulley 221 to make the transmission smoother, avoid the first rope 222 from deflecting and affecting the movement accuracy of the second support rod 212, further ensure the stability of the telescopic component 21 when it is raised and lowered, and ensure the smooth operation of the lighting lamp 90. The external design of the detector 12 not only completely solves the problem of inconvenience in inspection, cleaning and replacement when it is built-in, but also allows staff to operate directly without disassembling the bottom sleeve 112, which greatly shortens maintenance time, reduces maintenance difficulty and cost. It also avoids the problem of difficult installation of the detector 12 caused by the small internal space of the bottom sleeve 112. The detector 12 can be easily assembled without additional modifications to the inside of the sleeve, simplifying the production and assembly process.

[0055] In some embodiments, the detector 12 includes a pressure sensor, which is the detection unit of the detector 12. The pressure sensor is used to detect the tension of the first rope 222. As a mature force detection element, the pressure sensor can accurately capture subtle changes in the tension of the first rope 222. Whether the tension increases when the telescopic component 21 is obstructed from extending or decreases when it is obstructed from contracting, it can quickly provide accurate tension data. Compared with ordinary detection units, it significantly improves the sensitivity and accuracy of abnormal operating condition identification, avoids downtime delays or false triggers caused by detection errors, and provides a more accurate basis for judgment on the safe operation of the device.

[0056] As an alternative embodiment, the detector 12 includes an elastic element and a micro-switch. A first rope 222 is connected to the elastic element and can drive the elastic element to undergo elastic deformation under tension. This elastic deformation can be either extension or bending. When the tension of the first rope 222 exceeds a preset range, the elastic deformation of the elastic element also exceeds a preset value. The elastic element triggers the micro-switch, causing the micro-switch to send a trigger signal.

[0057] Specifically, the elastic element can be a spring, with both ends of the spring fixedly connected to the base 10 and the first end of the first rope 222, respectively. A lever is fixedly mounted on the spring, and the trigger end of the micro-switch is set to correspond to the movement path of the lever. Simultaneously, the control unit pre-sets the compression range of the spring during normal operation: a minimum value of s1 and a maximum value of s2. This range matches the spring deformation corresponding to the normal tension of the first rope 222. When the telescopic assembly 21 is in its normal telescopic state, the tension of the first rope 222 is stable, the force on the spring is balanced, and the compression remains between s1 and s2. The lever is in the middle position with the spring and does not contact the micro-switch. The control unit determines this to be a normal state and does not send a signal. When the telescopic assembly 21 is obstructed during extension (e.g., encountering an external obstacle), the tension of the first rope 222 increases, strengthening the force on the spring and increasing the spring compression. When the compression exceeds the preset maximum value s2, the lever on the spring moves towards the micro-switch during compression until it contacts and triggers the switch. The micro-switch transmits a trigger signal to the control unit, which determines that the tension is abnormal (too high) and immediately sends a stop or alarm signal. When the telescopic assembly 21 is obstructed during retraction (e.g., clamping an obstacle), the tension of the first rope 222 decreases, weakening the force on the spring and decreasing the spring compression. When the compression is below the preset minimum value s1, the spring drives the lever to move in the opposite direction, similarly triggering the micro-switch. The control unit determines that the tension is abnormal (too low) and quickly sends a corresponding trigger signal, achieving accurate identification of the two abnormal operating conditions.

[0058] In this embodiment, the extension and contraction of the spring directly reflects the change in tension of the first rope 222. Combined with the mechanical transmission of the lever, this avoids the problem of environmental interference affecting electronic components. Furthermore, the quantification thresholds of s1 and s2 make the detection of abnormal tension more concrete and with smaller errors. Whether the increased tension leads to compression exceeding s2, or the decreased tension leads to compression falling below s1, the lever can quickly trigger the switch, resulting in a fast response. In addition, the spring, lever, and micro-switch are all conventional mechanical components, small in size, and can perfectly fit the external design of the bottom sleeve 112. This avoids the installation difficulties caused by the limited internal space of the sleeve, facilitates later maintenance and replacement, and eliminates the need for complex calibration procedures, simplifying production and maintenance.

[0059] In some embodiments, the telescopic component 21 further includes a third support, ..., the Nth support rod, which are sequentially and movably connected to the second support rod 212. The movable connection methods include, but are not limited to, movable connections and hinges. In the following embodiments, the movable connection methods are described using sliding connections as an example. The telescopic mechanism 20 also includes a second transmission component ... the (N-1)th transmission component. The Mth transmission component includes an Mth fixed pulley and an Mth rope, where M is greater than or equal to 2 and less than or equal to N-1. The Mth fixed pulley is connected to the Mth support rod, and the Mth rope is wrapped around the Mth fixed pulley, with its two ends connected to the (M-1)th support rod and the M+1th support rod, respectively.

[0060] For example, if N equals five, please refer to [link / reference]. Figure 2 and Figure 4 The telescopic component 21 includes a first support rod 211, a second support rod 212, a third support rod 213, a fourth support rod 214 and a fifth support rod 215, and the telescopic mechanism 20 includes a first transmission component 22, a second transmission component 24, a third transmission component 25 and a fourth transmission component 26. The second transmission assembly 24 includes a second fixed pulley 241 and a second rope 242. The second fixed pulley 241 is connected to the second support rod 212, and the second rope 242 is wrapped around the second fixed pulley 241, with its two ends connected to the first support rod 211 and the third support rod 213, respectively. The third transmission assembly 25 includes a third fixed pulley 251 and a third rope 252. The third fixed pulley 251 is connected to the third support rod 213, and the third rope 252 is wrapped around the third fixed pulley 251, with its two ends connected to the second support rod 212 and the fourth support rod 214, respectively. The fourth transmission assembly 26 includes a fourth fixed pulley 261 and a fourth rope 262. The fourth fixed pulley 261 is connected to the fourth support rod 214, and the fourth rope 262 is wrapped around the fourth fixed pulley 261, with its two ends connected to the third support rod 213 and the fifth support rod 215, respectively.

[0061] The multi-stage transmission assembly utilizes the characteristics of fixed pulleys to create a "double-stroke extension" effect. When the first support rod 211 moves, the second transmission assembly 24 drives the third support rod 213 to move twice the distance of the second support rod 212. This movement is then transmitted sequentially through the third transmission assembly 25 and the fourth transmission assembly 26, ultimately resulting in the fifth support rod 215 moving a distance far greater than that of a single-section or double-section structure. This significantly extends the extension stroke, meeting the needs of high-altitude construction, large equipment lighting, and other applications requiring long-stroke height adjustment. The modular transmission assembly facilitates production assembly and subsequent maintenance, balancing practicality, expandability, and safety.

[0062] Please see Figure 5Optionally, the telescopic component 21 can also employ multiple sets of reverse transmission components 27 to pull the aforementioned support rods downwards, thereby achieving the contraction and deformation of the telescopic component 21. This reverse transmission component 27 can also be equipped with a reverse fixed pulley 271 and a reverse rope 272, whose connection direction and pulling direction are opposite to those of the transmission components in the above embodiment, which will not be elaborated here. In this way, when the telescopic component 21 contracts and deforms, compared to the contraction method that relies solely on gravity to move the support rods downwards, the reverse transmission component 27, through its reverse connection and pulling direction, can actively provide downward pulling force to each support rod, effectively compensating for insufficient gravity. For example, when the telescopic component 21 experiences poor gravity-driven contraction due to component friction, slight jamming, or tilting, the reverse transmission component 27 can precisely apply auxiliary pulling force to ensure that each support rod retracts smoothly into place, avoiding situations where "some support rods are suspended" or "the contraction stroke is insufficient."

[0063] It should be noted that the telescopic bracket 100 can also be applied to other devices, such as engineering machinery devices (e.g., as auxiliary brackets for aerial work platforms, measuring brackets for construction, cleaning brackets for high-pressure water guns, etc.), household items (e.g., telescopic bracket 100 as clothes drying racks, support frames for projectors, etc.), outdoor camping equipment (e.g., as tent support frames, table and chair support frames, etc.), and traffic facilities (e.g., as temporary traffic light brackets, etc.). The telescopic deformation direction of the telescopic component 21 can be adjusted as needed, such as in directions other than vertical.

[0064] The above are merely preferred embodiments of this application, and only specifically describe the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. A telescopic support, characterized in that, include: The base includes a base body and a detector disposed on the base body; The telescopic mechanism includes a telescopic component and a first transmission component. The telescopic component includes a first support rod and a second support rod. The first support rod is movably connected to the base body, and the second support rod is movably connected to the first support rod. The telescopic component is capable of telescopic deformation. The first transmission component includes a first fixed pulley and a first rope. The first fixed pulley is connected to the first support rod, and the first rope is wrapped around the first fixed pulley. Both ends are respectively connected to the second support rod and the detector. The detector is capable of detecting the tension of the first rope and can send a trigger signal when the tension of the first rope exceeds a preset range.

2. The telescopic bracket as described in claim 1, characterized in that, The telescopic assembly further includes a driving component connected to the base and the first support rod, and is used to drive the first support rod to move closer to or away from the base body, so that the telescopic assembly can telescopically deform.

3. The telescopic bracket as described in claim 1, characterized in that, The seat body includes a base plate and a bottom sleeve disposed on the base plate, and the first support rod is slidably connected to the bottom sleeve along the support direction.

4. The telescopic bracket as described in claim 3, characterized in that, The second support rod is slidably connected to the second support rod along the support direction.

5. The telescopic bracket as described in claim 1, characterized in that, The base also includes a bottom fixed pulley disposed on the base body, the first rope is wrapped around the bottom fixed pulley, and the detector is disposed outside the bottom sleeve.

6. The telescopic bracket as described in claim 1, characterized in that, The detector includes a pressure sensor for detecting the tension in the first rope.

7. The telescopic bracket as described in claim 1, characterized in that, The detector includes an elastic element and a micro-motion limit switch. The first rope is connected to the elastic element and can drive the elastic element to undergo elastic deformation under tension. When the tension of the first rope exceeds a preset range, the elastic element triggers the micro-motion limit switch, so that the micro-motion limit switch sends the trigger signal.

8. The telescopic bracket as described in claim 2, characterized in that, The telescopic mechanism also includes a controller, which is connected to the base and communicates with the detector. The controller can control the drive component to stop after receiving the trigger signal.

9. The telescopic bracket as described in claim 1, characterized in that, The telescopic assembly further includes a third support rod...the Nth support rod connected in sequence. The third support rod is movably connected to the second support rod. The telescopic mechanism also includes a second transmission assembly...the (N-1)th transmission assembly. The Mth transmission assembly includes an Mth fixed pulley and an Mth rope, where M is greater than or equal to 2 and less than or equal to N-1. The Mth fixed pulley is connected to the Mth support rod, and the Mth rope is wrapped around the Mth fixed pulley, with its two ends connected to the (M-1)th support rod and the M+1th support rod, respectively.

10. A lighting device, characterized in that, It includes a lighting fixture and a telescopic bracket as described in any one of claims 1 to 9, wherein the lighting fixture is connected to the end of the telescopic assembly remote from the base.

Images