Fire rescue communication signal blind area compensation system

Abstract

The application discloses a fire rescue communication signal blind area compensation system, comprising: a plurality of signal relay devices, a communication monitoring module and a networking control terminal. Each signal relay device is installed or placed in a signal blind area, and the devices are wirelessly connected and form a network. The signal relay device comprises a host, an antenna, a universal adjusting locking device and an angle display mechanism. The antenna is connected to the host through the universal adjusting locking device, which is used for adjusting and locking the installation angle of the antenna. The angle display mechanism is arranged on the antenna and is used for real-time detection and display of the installation angle of the antenna, thereby providing a visual angle reference for the user. The communication monitoring module is used for monitoring the communication state of the network. The networking control terminal is used for controlling the signal connection state between the signal relay devices. The universal adjusting locking device is used for flexible adjustment and stable locking of the angle of the antenna, and the angle display mechanism is used for visual adjustment, thereby ensuring smooth communication in fire rescue.

Description

Technical Field

[0001] This invention relates to the field of fire communication equipment technology, and in particular to a fire rescue communication signal blind spot compensation system. Background Technology

[0002] In fire and rescue operations, areas such as building basements, elevator shafts, underground tunnels, mine shafts, and collapsed ruins in mountainous areas have complex structures and many obstructions, which can easily create wireless communication signal blind spots. This can lead to the interruption of internal communication for rescue personnel and the inability to transmit command signals, severely restricting the efficiency of fire and rescue operations and even causing rescue safety accidents.

[0003] Currently, most existing fire communication compensation antennas and auxiliary communication equipment adopt fixed-angle installation structures or simple manual adjustment structures. There is no visual reference for antenna angle adjustment, and rescuers can only make minor adjustments based on experience, which cannot accurately align with the direction of the strongest signal. The blind zone compensation effect is inconsistent and it is difficult to maximize the elimination of the impact of signal obstruction and attenuation. At the same time, conventional adjustment structures do not have dedicated locking mechanisms. Vibrations, personnel touch, and equipment displacement at the rescue site can easily cause antenna angle deviation, resulting in repeated fluctuations and interruptions in communication signals, which cannot guarantee continuous and stable communication throughout the rescue. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a fire rescue communication signal blind spot compensation system, which can realize the visual adjustment of the antenna angle and can be stably locked after adjustment, ensuring smooth communication throughout the fire rescue process.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A fire rescue communication signal blind zone compensation system includes: multiple signal relay devices, a communication monitoring module, and a network control terminal;

[0007] Each of the aforementioned signal relay devices is used for installation or placement in signal dead zones. Multiple signal relay devices are connected wirelessly to form a network. Each signal relay device includes a host, an antenna, a universal adjustment locking device, and an angle display mechanism. The antenna is connected to the host through the universal adjustment locking device and is supported by the host. The universal adjustment locking device is used to adjust and lock the installation angle of the antenna. The angle display mechanism is located on the antenna and is used to detect the installation angle of the antenna in real time to provide users with a real-time angle reference.

[0008] The communication monitoring module is wirelessly connected to each signal relay device and is used to monitor the communication status of the network.

[0009] The network control terminal is wirelessly connected to each of the signal relay devices and is used to control the signal connection status between the signal relay devices.

[0010] Furthermore, the antenna is provided with multiple antennas, the universal adjustment locking device is provided with multiple universal adjustment locking devices, and the angle display mechanism is provided with multiple angle display mechanisms. Each antenna is connected to the host through one of the universal adjustment locking devices, and each angle display mechanism is provided on one of the antennas.

[0011] Furthermore, the universal adjustment locking device includes a spherical hinge seat, a spherical hinge rod, multiple locking balls, and a housing. The spherical hinge seat is disposed on the main unit and has a spherical space and multiple receiving slots. The spherical space extends from the top of the spherical hinge seat, and each receiving slot is disposed on the side wall of the spherical hinge seat, and each receiving slot is connected to the spherical space and the external environment. The spherical hinge rod is connected to the antenna and is disposed within the spherical space, and is spherically hinged to the spherical space. Each locking ball is disposed in one of the receiving slots and can abut and lock the spherical surface of the spherical hinge rod located in the receiving slot. The housing is sleeved on the side wall of the spherical hinge seat and is used to abut and drive each locking ball to abut and lock the spherical surface of the spherical hinge rod located in the receiving slot.

[0012] Furthermore, the sleeve is provided with an internal thread, and the outer wall of the spherical hinge seat is provided with an external thread, and the internal thread and the external thread are threadedly engaged.

[0013] Furthermore, the universal adjustment locking device also includes at least two stabilizing members, which are located on opposite horizontal sides of the spherical hinge seat. The two ends of each stabilizing member are connected to the spherical hinge seat and the housing, respectively. The stabilizing members are used to prevent the threaded engagement of the internal thread and the external thread from loosening due to vibration.

[0014] Furthermore, the angle display mechanism includes an indicator rod, at least two collars, a scale ring, and a mounting bracket. The two collars are rotatably fitted around the periphery of the antenna. Each collar has a connecting post on its outer side wall. The two ends of the indicator rod are respectively connected to the connecting posts on the two collars. The length extension direction of the indicator rod is always consistent with the length extension direction of the antenna. The mounting bracket has a mounting sleeve and a first comparison rod. The mounting sleeve is rotatably fitted with the connecting post on one of the collars. The first comparison rod is disposed on the mounting sleeve. The length extension direction of the first comparison rod can form an angle with the length extension direction of the indicator rod. The scale ring is disposed on the first comparison rod and is used for the user to adjust the angle between the first comparison rod and the indicator rod.

[0015] Furthermore, the mounting bracket also includes a second comparison rod and a gravity pendulum. The second comparison rod is disposed on the mounting sleeve, and the length extension direction of the second comparison rod is always perpendicular to the length extension direction of the first comparison rod. The gravity pendulum is connected to one end of the second comparison rod so that the length extension direction of the second comparison rod is always consistent with the gravity direction, thereby making the length extension direction of the first comparison rod always extend horizontally.

[0016] Furthermore, the inner side of the collar is provided with a sliding groove, and the outer side wall of the antenna is provided with at least two ring rails. The two ring rails are arranged sequentially along the length extension direction of the antenna. The sliding groove is slidably connected to one of the ring rails, and the sliding groove and the ring rail are engaged with sliding damping.

[0017] Furthermore, the signal relay device also includes a mounting base plate and a connecting device. The mounting base plate is provided with threaded holes for mounting the mounting base plate to the wall with screws or bolts. The host is detachably connected to the mounting base plate through the connecting device.

[0018] Furthermore, the connecting device includes a sleeve seat, a connecting pipe, an abutment locking rod, and a linkage rod. The sleeve seat is disposed on the mounting base plate, and a column is provided inside the sleeve seat, forming an annular space with the sleeve seat. The connecting pipe connects to the main unit and carries the main unit. The connecting pipe can be inserted into the annular space. The abutment locking rod is slidably connected to the column. The abutment locking rod is used to abut and lock the inner wall of the connecting pipe inserted into the annular space. The abutment locking rod has a pushed part. The linkage rod is slidably connected to the column, and the sliding path of the linkage rod is consistent with the movement path of the connecting pipe. The linkage rod is used to push the pushed part to slide under the pressure of the connecting pipe, thereby driving the abutment locking rod to abut and lock the inner wall of the connecting pipe.

[0019] Furthermore, the signal relay device also includes a power supply module.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The angle display mechanism is mounted on the antenna and used to detect the antenna's installation angle in real time, providing users with a real-time angle reference. Traditional fire signal relay antennas are mostly fixed-angle or manually adjustable without scales. Rescue personnel cannot accurately determine the antenna's orientation angle and can only rely on experience for repeated adjustments, which easily leads to antenna orientation deviation and signal transmission direction misalignment, resulting in incomplete blind zone signal compensation and insufficient local signal strength. This invention, by setting an angle display mechanism on the antenna, can provide real-time and intuitive feedback on the specific angle data of the antenna's horizontal rotation and vertical elevation, providing operators with a quantitative adjustment basis. Operators can combine the on-site signal obstruction terrain and real-time signal strength data to precisely fine-tune the antenna to the optimal signal transmission position, preventing signal deviation problems caused by blind adjustments.

[0022] 2. The antenna is connected to the host computer via the universal adjustment locking device and is supported by the host computer. The universal adjustment locking device is used to adjust and lock the installation angle of the antenna. Fire and rescue sites are complex environments with numerous external interference factors such as equipment vibration, accidental personnel contact, ground displacement, and airflow impact. Traditional adjustable antennas lack a reliable locking structure after adjustment, making them prone to angle deviation, which disrupts the optimal signal transmission posture, causing signal attenuation, communication fluctuations, or even short-term interruptions, severely impacting rescue operations. This invention employs an integrated adjustable and lockable universal adjustment locking device, which not only enables flexible adjustment of the antenna in all directions and at multiple angles to adapt to the signal transmission angle requirements of various complex terrains, but also provides rigid locking after the antenna is adjusted to the optimal angle, firmly fixing the antenna in its optimal transmission posture.

[0023] 3. Based on the fact that each of the signal relay devices is installed or placed in a signal dead zone, multiple signal relay devices are wirelessly connected to form a network. The communication monitoring module is wirelessly connected to each signal relay device and is used to monitor the communication status of the network. The network control terminal is wirelessly connected to each signal relay device and is used to control the signal connection status between the signal relay devices. This invention achieves high-precision signal coverage across the entire area by autonomously building a full-area signal compensation transmission network through multiple signal relay devices, combined with the core advantages of antenna visualization, precise angle adjustment, and stable locking. At the same time, the communication monitoring module dynamically collects the network signal strength, smoothness, and equipment operating status in real time, and the network control terminal remotely and dynamically adjusts the network operating status, forming a closed-loop system of "precise angle adjustment to stabilize the signal, real-time monitoring to check for faults, and dynamic adjustment to optimize the network". This not only solves the problems of signal obstruction and attenuation in complex situations, but also adapts to the needs of dynamic changes in the scene during rescue, ensuring stable and smooth communication throughout the entire process and area of ​​fire rescue, and providing reliable communication support for emergency rescue command and on-site operation communication. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a signal relay device;

[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 This is a cross-sectional schematic diagram of a signal relay device;

[0027] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0028] Figure 5 This is a cross-sectional schematic diagram of the connecting device.

[0029] In the diagram: 11. Main unit; 12. Antenna; 121. Ring rail; 13. Universal adjustment locking device; 131. Spherical hinge seat; 1311. Spherical space; 1312. Receiving groove; 1313. External thread; 132. Spherical hinge rod; 133. Locking ball; 134. Housing; 1341. Internal thread; 135. Stabilizer; 14. Angle display mechanism; 141. Marker rod; 142. Collar; 1421. Connecting post; 1 422. Slide groove; 143. Scale ring; 144. Mounting bracket; 1441. Mounting sleeve; 1442. First comparison rod; 1443. Second comparison rod; 1444. Gravity pendulum; 15. Mounting base plate; 16. Connecting device; 161. Sleeve seat; 1611. Column; 162. Connecting pipe; 163. Abutment locking rod; 1631. Pushed part; 164. Linkage rod; 165. Annular space; 17. Power supply module. Detailed Implementation

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0032] 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 invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] See Figures 1-5 A preferred embodiment of the present invention provides a fire rescue communication signal blind spot compensation system, comprising: multiple signal relay devices, a communication monitoring module, and a network control terminal. The multiple signal relay devices are respectively installed or placed in signal blind spots and weak signal areas at the fire rescue site. The signal relay devices are wirelessly networked to form a full-area signal compensation transmission network. The communication monitoring module is wirelessly connected to each signal relay device, and the network control terminal is bidirectionally wirelessly connected to each signal relay device and the communication monitoring module.

[0034] The signal relay equipment includes a host 11, an antenna 12, a universal adjustment locking device 13, and an angle display mechanism 14. The antenna 12 is connected to the top of the host 11 through the universal adjustment locking device 13. The host 11 provides overall support, power supply, and signal transmission support. By incorporating a wireless networking module, a signal amplification module, and a data transmission module into the host 11, it enables autonomous networking, signal relay, and amplification functions among multiple signal relay devices. The signal relay equipment can be deployed in two ways: one is pre-embedded deployment, where the equipment is concealed and installed in areas prone to signal blind spots during the construction phase of buildings, such as corridors, basements, and wall cavities, achieving a fixed, full-coverage layout; the other is mobile deployment, where the equipment is made into a portable, explosion-proof design, carried by rescue personnel to rescue sites such as fires, collapses, and confined spaces. It can be flexibly placed and temporarily deployed according to signal obstruction and terrain barriers to quickly fill temporary signal blind spots. After multiple signal relay devices are deployed, they automatically complete frequency band matching and device pairing through the built-in wireless networking module, and autonomously build a distributed global signal compensation transmission network. This network can extend, relay, and amplify communication signals in weak areas and blind spots, solving the problems of signal attenuation and interruption in complex rescue environments.

[0035] The universal adjustment locking device 13 is located between the host 11 and the antenna 12. It is used to adjust the orientation angle of the antenna 12 in all directions and achieve attitude locking. The universal adjustment locking device 13 can adopt a universal ball joint structure, a three-dimensional rotating shaft adjustment structure, or a multi-joint micro-adjustment structure. It has the ability to rotate 360° horizontally and adjust the vertical pitch from 0 to 90°, which can adapt to the signal transmission angle requirements of different complex terrains such as building obstruction, underground space, and outdoor ruins. Rescue personnel can manually operate the universal adjustment locking device 13 to freely adjust the horizontal orientation and pitch angle of the antenna 12 based on the signal strength data detected by the handheld signal detector at the scene. At the same time, the device integrates a mechanical locking structure, which can adopt various locking methods such as friction locking, bolt tightening, and hydraulic locking. After the antenna 12 is adjusted to the optimal angle, it is locked through the mechanical structure to prevent the antenna 12 angle from shifting due to external interference such as equipment vibration, accidental contact by personnel, slight ground displacement, and airflow impact at the rescue site. This continuously fixes the optimal signal transmission posture and ensures the stability and accuracy of signal compensation.

[0036] The angle display mechanism 14 is fixedly mounted on the side wall or top of the antenna 12 and synchronously linked with the adjustment end of the antenna 12. It is used to detect and display the installation angle data of the antenna 12 in real time. The angle display mechanism 14 can be any one of a mechanical angle dial, an electronic digital angle sensor, or a tilt-sensing display screen. The mechanical dial can be marked with horizontal rotation angle and vertical pitch angle scales, corresponding to the scale values ​​synchronously as the antenna 12 rotates. The electronic digital display structure can collect angle data in real time and display it digitally, providing operators with accurate real-time angle references. Operators can accurately control the adjustment range of the antenna 12 through the real-time data from the angle display mechanism 14, preventing blind adjustments that could lead to signal transmission deviations, and quickly calibrating the antenna 12 to the optimal signal transmission position, thus improving the adjustment efficiency and accuracy of signal blind zone compensation.

[0037] The communication monitoring module integrates a signal strength acquisition unit, a connectivity detection unit, and a device status diagnostic unit, establishing real-time wireless communication interfaces with all networked signal relay devices. The module dynamically and continuously collects core operational data from all signal relay devices across the network, including real-time signal strength, signal transmission connectivity, network connection status, device operating temperature, and fault reports. It also identifies faults such as localized signal fluctuations, device offline status, and abnormal signal attenuation. The communication monitoring module can be integrated from a wireless communication transceiver unit, a signal strength detection chip, a signal bit error rate detection unit, a device operating condition acquisition unit, a microprocessor, and a data storage unit. Specifically, it can employ any of the following: an IoT communication monitoring module, an embedded RF signal monitoring module, or an industrial-grade wireless network status acquisition module.

[0038] The network control terminal can be a portable touch terminal or a back-end industrial control terminal, wirelessly linked with each signal relay device and communication monitoring module. Operators can view the operating data, signal distribution status, and blind spot compensation effect of all network devices in real time through the network control terminal. When the on-site rescue area shifts or the signal blind spot range changes, the network parameters can be remotely fine-tuned through the terminal to adapt to the dynamically changing rescue communication needs on site, achieving intelligent and refined full-area signal compensation and control. Specifically, the portable touch terminal can be any one of the following: industrial-grade explosion-proof tablet computer, intrinsically safe handheld smart terminal, or fire-fighting dedicated touch operation terminal; the back-end industrial control terminal can be any one of the following: embedded industrial control computer, wall-mounted industrial control touch all-in-one machine, or integrated touch operation console for command center.

[0039] The operation process of this invention is as follows: Based on the terrain and signal obstruction at the fire rescue site, multiple signal relay devices are deployed and installed in signal blind spots and areas with weak signals (they can be pre-installed during building construction or brought in and installed by rescue personnel during rescue operations). Each device autonomously forms a network via wireless communication to build a full-area signal compensation transmission network. Installers can use the universal adjustment locking device 13 of the signal relay device to adjust the orientation angle of the antenna 12 in all directions, while simultaneously reading the angle data in real time through the angle display mechanism 14 on the antenna 12, precisely adjusting the antenna 12 to the optimal position for signal transmission. After determining the optimal angle, the antenna 12 is locked in position using the universal adjustment locking device 13 to prevent angle deviation caused by on-site vibration, personnel contact, equipment displacement, or other special circumstances, thus fixing the optimal signal compensation state. After deployment and debugging, the communication monitoring module wirelessly connects to all signal relay devices in real time, dynamically collecting data such as network signal strength, signal smoothness, and equipment operating status, and monitoring the communication status of each signal relay device throughout the process. Operators can obtain network operation data in real time through the network control terminal and remotely adjust the signal connection and operating status of each relay device according to on-site rescue needs, dynamically optimizing the network layout. During communication operations, the multi-device network continuously extends, relays, and amplifies communication signals in blind spots. The visual angle adjustment structure ensures signal compensation accuracy, the locking structure continuously maintains the stable attitude of the antenna 12, and the monitoring module and control terminal work together to ensure continuous and efficient network operation, preventing signal attenuation and communication fluctuations caused by complex rescue environments.

[0040] Obviously, the angle display mechanism 14, mounted on the antenna 12, is used to detect the installation angle of the antenna 12 in real time, providing users with a real-time angle reference. Traditional fire signal relay antennas 12 are mostly fixed-angle or manually adjustable without scales. Rescue personnel cannot accurately determine the orientation angle of the antenna 12 and can only rely on experience for repeated adjustments, which easily leads to antenna 12 orientation deviation and signal transmission direction misalignment, resulting in incomplete blind zone signal compensation and insufficient local signal strength. This invention, by mounting an angle display mechanism 14 on the antenna 12, can provide real-time and intuitive feedback on the specific angle data of the antenna 12's horizontal rotation and vertical elevation, providing operators with a quantitative adjustment basis. Operators can combine the terrain obstructing the signal and real-time signal strength data to precisely fine-tune the antenna 12 to the optimal signal transmission position, preventing signal deviation problems caused by blind adjustments.

[0041] The antenna 12 is connected to the host 11 via the universal adjustment locking device 13 and is supported by the host 11. The universal adjustment locking device 13 is used to adjust and lock the installation angle of the antenna 12. Fire rescue sites are complex environments with numerous external interference factors such as equipment vibration, accidental personnel contact, ground displacement, and airflow impact. Traditional adjustable antennas 12 lack a reliable locking structure after adjustment, making them prone to angle deviation, which disrupts the optimal signal transmission posture, causing signal attenuation, communication fluctuations, or even short-term interruptions, severely impacting rescue operations. This invention employs an integrated adjustable and lockable universal adjustment locking device 13, which not only enables flexible adjustment of the antenna 12 in all directions and at multiple angles to adapt to the signal transmission angle requirements of various complex terrains, but also provides rigid locking after the antenna 12 is adjusted to the optimal angle, firmly fixing the antenna 12 in its optimal transmission posture.

[0042] Based on the fact that each of the signal relay devices is installed or placed in a signal blind zone, multiple signal relay devices are wirelessly connected to form a network. The communication monitoring module is wirelessly connected to each signal relay device and is used to monitor the communication status of the network. The network control terminal is wirelessly connected to each signal relay device and is used to control the signal connection status between the signal relay devices. This invention achieves full-area high-precision signal coverage by autonomously building a full-area signal compensation transmission network through multiple signal relay devices, combined with the core advantages of antenna 12's visual precise angle adjustment and stable locking. At the same time, the communication monitoring module dynamically collects the network signal strength, smoothness, and equipment operating status in real time, and the network control terminal remotely and dynamically adjusts the network operating status, forming a closed-loop system of "precise angle adjustment to stabilize the signal, real-time monitoring to check for faults, and dynamic adjustment to optimize the network". This not only solves the problems of signal obstruction and attenuation in complex situations, but also adapts to the needs of dynamic changes in the scene during rescue, ensuring stable and smooth communication throughout the entire process and area of ​​fire rescue, and providing reliable communication support for emergency rescue command and on-site operation communication.

[0043] Preferably, multiple antennas 12, multiple universal adjustment locking devices 13, and multiple angle display mechanisms 14 are provided. Each antenna 12 is connected to the host 11 through one of the universal adjustment locking devices 13, and each angle display mechanism 14 is located on one of the antennas 12. Specifically, this configuration allows multiple antennas 12 to be independently configured with dedicated universal adjustment locking devices 13 and angle display mechanisms 14, enabling each antenna 12 to achieve independent angle visualization adjustment and independent attitude locking, adapting to the complex signal attenuation environment of multiple directions, multiple obstructions, and multiple angles at fire and rescue sites. Rescue sites often have multiple walls obstructing, rubble blocking, and signal shielding from multi-layered buildings. A single angle adjustment cannot simultaneously meet the optimal signal transmission requirements of the entire area. This structure can precisely fine-tune the horizontal and pitch angles of the corresponding antennas 12 for signal blind spots in different directions. Each antenna 12 can be independently calibrated to the optimal signal transmission position in the corresponding direction, improving the signal coverage and signal compensation uniformity of a single signal relay device. Each independent omnidirectional adjustment locking device 13 can independently and rigidly lock the corresponding antenna 12, ensuring that the attitude of each antenna 12 does not interfere with each other and remains stable. This prevents the signal transmission effect of the entire device from being affected by external vibrations or contact displacement of a single antenna 12, continuously maintaining the optimal signal compensation state in multiple directions, and improving the stability and anti-interference capability of the communication network in complex rescue environments. Each antenna 12 is equipped with an independent angle display mechanism 14, which can individually provide feedback on the real-time adjustment angle data of each antenna 12. This allows operators to accurately grasp the adjustment status of each signal transmission antenna 12, and to perform targeted local signal compensation adjustment, achieving refined and zoned signal blind spot compensation. This further improves the accuracy and comprehensiveness of signal compensation in fire rescue blind spots, ensuring that rescue communication is free of dead zones and fluctuations throughout the entire process.

[0044] refer to Figure 3 and Figure 4Preferably, the universal adjustment locking device 13 includes a spherical hinge seat 131, a spherical hinge rod 132, a plurality of locking balls 133, and a housing 134. The spherical hinge seat 131 is disposed on the main unit 11. The spherical hinge seat 131 has a spherical space 1311 and a plurality of receiving slots 1312. The spherical space 1311 extends from the top of the spherical hinge seat 131. Each of the receiving slots 1312 is disposed on the side wall of the spherical hinge seat 131, and each of the receiving slots 1312 is respectively connected to the spherical space 1311 and the external environment. The rod 132 is connected to the antenna 12. The spherical hinge rod 132 is disposed in the spherical space 1311 and is spherically hinged to the spherical space 1311. Each of the locking balls 133 is disposed in one of the receiving grooves 1312 and can abut and lock the spherical surface of the spherical hinge rod 132 located in the receiving groove 1312. The sleeve 134 is sleeved on the side wall of the spherical hinge seat 131 and is used to abut and drive each of the locking balls 133 to abut and lock the spherical surface of the spherical hinge rod 132 located in the receiving groove 1312. Specifically, this configuration allows for omnidirectional, seamless angle adjustment of the antenna 12 through the spherical hinge seat 131 and the spherical hinge rod 132. This easily adapts to the antenna 12's pitch and deflection fine-tuning needs under various complex obstruction conditions at fire and rescue sites, enhancing the flexibility and adaptability of the antenna 12's angle adjustment. By providing multiple accommodating slots 1312 connecting the spherical spaces 1311 on the sidewall of the spherical hinge seat 131, installation and limiting space is provided for multiple locking balls 133, ensuring that each locking ball 133 is fixed in position and subjected to uniform force, preventing problems such as locking ball 133 offset, jamming, or detachment, and ensuring the stability of the locking structure. Relying on the squeezing and pressing drive mechanism of the housing 134, multiple locking balls 133 can be simultaneously driven to press inward against the spherical surface of the spherical hinge rod 132, forming a multi-point encircling locking limit, which can stably maintain the optimal signal transmission posture of the antenna 12. Meanwhile, this structure eliminates the need for complex transmission components, making adjustment and unlocking operations simple and quick without the need for specialized tools. This allows rescue personnel to rapidly adjust the antenna angle and lock it in emergency rescue scenarios, improving on-site network setup and debugging efficiency. Specifically, the locking ball 133 can be made of high-hardness wear-resistant steel or ceramic anti-slip material; the housing 134 can be a threaded tightening type, an elastic pressing type, or an axial pressing type; and the spherical hinge contact surface can be further coated with an anti-slip frosted layer to enhance locking friction and anti-deviation performance.

[0045] refer to Figure 4Preferably, the housing 134 is provided with an internal thread 1341, and the outer wall of the spherical hinge seat 131 is provided with an external thread 1313, with the internal thread 1341 and the external thread 1313 threadedly engaged. Specifically, this design can utilize the mechanical self-locking characteristics of the threaded pair to solve the problem of continuous vibration and external disturbance at the fire rescue site causing the housing 134 to loosen and shift, the locking force to weaken, and thus the antenna 12 to fail to lock. Continuous vibrations such as equipment shaking, personnel touching, and environmental impact at the rescue site can easily cause axial movement and circumferential loosening of the ordinary sleeve and compression type housing 134, causing the locking force of the housing 134 on the locking ball 133 to gradually weaken and become uneven, resulting in the locking ball 133 being unable to tightly press against the spherical hinge rod 132, ultimately leading to defects such as antenna 12 angular displacement, locking failure, and signal attitude instability. The threaded connection can be further enhanced with anti-slip damping rings, anti-loosening thread sealant, or locking washers to improve its anti-loosening and vibration resistance. The internal thread 1341 and external thread 1313 can use fine-pitch threads to improve the precision of preload adjustment and long-term self-locking stability. Alternatively, as a preferred implementation, the thread engagement adjustment structure can be replaced with an axial slot-type positioning structure. Through multi-stage slot engagement between the sleeve 134 and the spherical hinge seat 131, multi-position fixed limiting can be achieved to resist vibration-induced loosening. It can also be replaced with an elastic expansion constant-force clamping structure, relying on the deformation of the elastic sleeve to provide a constant clamping force, preventing vibration-induced attenuation of the clamping force. An eccentric wheel + locking pin clamping structure can also be used, allowing for rapid clamping followed by mechanical locking pin limiting, achieving high-strength vibration-resistant locking and rapid unlocking, suitable for high-frequency, rapid angle adjustment operations.

[0046] refer to Figure 4Preferably, the universal adjustment locking device 13 further includes at least two stabilizing members 135, which are respectively located on opposite horizontal sides of the spherical hinge seat 131. The two ends of each stabilizing member 135 are connected to the spherical hinge seat 131 and the housing 134, respectively. The stabilizing members 135 are used to prevent loosening of the threaded engagement between the internal thread 1341 and the external thread 1313 due to vibration. This arrangement, by symmetrically arranging the stabilizing members 135 on opposite horizontal sides of the spherical hinge seat 131, forms a double-sided auxiliary anti-loosening limiting structure based on the original threaded self-locking structure. This addresses the long-term high-frequency vibration and intermittent impact conditions at fire and rescue sites, preventing micro-gaps, thread loosening, and preload loss in the threaded pair after long-term vibration, thus ensuring the connection stability of the threaded engagement from a dual-protection perspective. The symmetrically arranged stabilizing components 135 on both sides can form a uniform bidirectional tensioning limit on the housing 134, restricting the circumferential rotation and axial movement of the housing 134 relative to the spherical hinge seat 131. This further prevents slight loosening and displacement of the housing 134 caused by vibration, ensuring that the clamping force of the housing 134 on the locking ball 133 remains constant. This prevents faults such as attenuation of the clamping force of the locking ball 133, failure of the spherical locking of the antenna 12, and angular deviation of the antenna 12 due to loose threads, and continuously and stably maintains the optimal signal transmission posture of the antenna 12. The stabilizing components 135 can be any one of the following: compression spring, elastic tensioning strap, damping tensioning bolt, and spring anti-loosening buckle.

[0047] refer to Figure 1 and Figure 2Preferably, the angle display mechanism 14 includes an indicator rod 141, at least two collars 142, a scale ring 143, and a mounting bracket 144. The two collars 142 are rotatably fitted around the antenna 12. Each collar 142 has a connecting post 1421 on its outer side wall. The two ends of the indicator rod 141 are respectively connected to the connecting posts 1421 on the two collars 142. The length extension direction of the indicator rod 141 is always consistent with the length extension direction of the antenna 12. The mounting bracket 144 has mounting... The mounting sleeve 1441 and the first comparison rod 1442 are rotatably connected to a connecting post 1421 on one of the collars 142. The first comparison rod 1442 is mounted on the mounting sleeve 1441, and its extension direction can form an angle with the extension direction of the marking rod 141. The scale ring 143 is mounted on the first comparison rod 1442 and is used by the user to adjust the angle between the first comparison rod 1442 and the marking rod 141. This configuration, with the rotatable connection structure of the double collars 142 and the marking rod 141 connected at both ends, allows the marking rod 141 to always follow the antenna 12 in synchronous deflection and pitch movement, ensuring that the marking rod 141 and the antenna 12 are completely synchronized in attitude and direction, and can provide a true, intuitive, and accurate feedback on the real-time spatial angle state of the antenna 12. The first comparison rod 1442 can be independently rotated and positioned by the relatively rotatable mounting sleeve 1441 and the connecting column 1421, forming an adjustable angle with the following marker rod 141. Combined with the scale comparison function of the scale ring 143, the operator can directly read the angle value between the two, accurately quantifying the deflection angle of the antenna 12. This purely mechanical angle display mechanism 14 requires no power or sensors, and is unaffected by harsh environments such as dust, smoke, high and low temperatures, and electromagnetic interference at fire and rescue sites. It has strong anti-interference capabilities, high reliability, and can stably achieve angle detection and display functions around the clock, adapting to complex rescue operation scenarios. The scale ring 143 can use laser-etched scales, an embedded scale, or a high-precision angle scale to improve reading accuracy; a wear-resistant and drag-reducing bushing can be installed on the inner side of the collar 142 to ensure smooth rotation and no wear deviation over long-term use; the marker rod 141 and the first comparison rod 1442 can use high-visibility color matching or fluorescent marking structures to meet the reading and observation needs of dimly lit rescue sites. It is understandable that, as a better implementation method, the mechanical comparison scale structure can be replaced with a miniature electronic tilt digital display structure, which uses a built-in tilt sensor to collect the antenna's 12 angles in real time and display them digitally to achieve automated angle reading; it can also be replaced with a pointer-type coaxial angle scale structure, which uses a central coaxial pointer in conjunction with the scale dial to simplify the structure and achieve intuitive angle display; or it can be replaced with a magnetic angle scale mechanism, which uses magnetic positioning to achieve angle tracking and comparison, taking into account both ease of disassembly and assembly and angle display accuracy, and adapting to the needs of rapid debugging in multiple scenarios.

[0048] refer to Figure 1 and Figure 2 Preferably, the mounting bracket 144 further includes a second comparison rod 1443 and a gravity pendulum 1444. The second comparison rod 1443 is disposed on the mounting sleeve 1441, and the length extension direction of the second comparison rod 1443 is always perpendicular to the length extension direction of the first comparison rod 1442. The gravity pendulum 1444 is connected to one end of the second comparison rod 1443 so that the length extension direction of the second comparison rod 1443 is always consistent with the direction of gravity, thereby ensuring that the length extension direction of the first comparison rod 1442 is always horizontal. This arrangement utilizes the self-weight and descent characteristics of the gravity pendulum 1444 to ensure that the second comparison rod 1443 always adaptively conforms to the vertical direction of gravity. The vertical fixing structure of the second comparison rod 1443 and the first comparison rod 1442 can forcefully ensure that the first comparison rod 1442 is always in a standard horizontal extension state, providing a constant horizontal reference for the angle measurement of the antenna 12. Uneven ground surfaces and random tilt angles of equipment at fire and rescue sites can easily cause misalignment of ordinary angle calibration mechanisms, leading to inaccurate angle adjustments and deviations in optimal signal orientation calibration. This structure, through gravity-adaptive alignment, eliminates the need for manual leveling and reference calibration, automatically establishing an absolute horizontal reference under any tilted placement conditions. This improves the consistency and accuracy of the antenna's 12-angle measurements. The gravity pendulum 1444 utilizes a high-density metal counterweight and rust-resistant solid weight blocks to ensure vertical stability. The gravity pendulum 1444 can be assembled via a detachable threaded connection for easy maintenance and replacement.

[0049] refer to Figure 2 and Figure 4Preferably, the inner side of the collar 142 is provided with a sliding groove 1422, and the outer side wall of the antenna 12 is provided with at least two ring rails 121. The two ring rails 121 are arranged sequentially along the length extension direction of the antenna 12. The sliding groove 1422 is slidably connected to one of the ring rails 121, and the sliding groove 1422 and the ring rail 121 adopt a sliding damping cooperation. This arrangement allows the multiple sets of ring rails 121 arranged on the outer side wall of the antenna 12 to form a sliding cooperation structure with the sliding groove 1422 on the inner side of the collar 142. This enables adjustable assembly of the collar 142 along the axial position of the antenna 12, and allows flexible adjustment of the installation position of the collar 142 according to the actual installation height of the antenna 12 and signal adjustment requirements. This adapts to different antenna 12 usage scenarios with different lengths and installation postures, improving the assembly adaptability and debugging flexibility of the angle display mechanism 14. The sliding groove 1422 and the ring rail 121 adopt a sliding fit, which can effectively limit the radial sway, offset and jamming of the collar 142, ensuring that the collar 142 can only rotate smoothly in the circumference of the ring rail 121 and slide precisely in the axial direction. This makes the rotation of the collar 142 smooth and without offset, thereby ensuring that the indicator rod 141 follows the movement accurately and synchronously without deviation, thus preventing the angle display mechanism 14 from causing reading errors. Among them, the contact surface between the sliding groove 1422 and the ring rail 121 can be equipped with a wear-resistant lubricating coating, an embedded wear-resistant bushing or a ball bearing sliding structure to further reduce sliding friction resistance and improve the smoothness of rotation and sliding.

[0050] refer to Figure 1 and Figure 2Preferably, the signal relay equipment further includes a mounting base plate 15 and a connecting device 16. The mounting base plate 15 has threaded holes for mounting to a wall using screws or bolts. The main unit 11 is detachably connected to the mounting base plate 15 via the connecting device 16. This configuration achieves wall-mounted installation of the equipment base using the threaded mounting base plate 15. The threaded holes, combined with conventional screws and bolts, allow for secure wall mounting. This installation method is mature, reliable, and highly adaptable, ensuring stable fixation of the signal relay equipment to building walls and facades. It effectively avoids the problems of ground-mounted equipment being easily stepped on, bumped, or displaced, ensuring stable equipment placement and fixed signal coverage. This provides a reliable installation foundation for precise angle adjustment and stable signal locking compensation of the antenna 12. The main unit 11 forms a detachable connection structure with the mounting base plate 15 via the connecting device 16. This eliminates the need for overall disassembly and assembly of the main unit 11 with all fixing screws, allowing for quick and easy assembly and disassembly. This greatly facilitates subsequent equipment maintenance, replacement, charging, and fault repair, without requiring the removal of the wall-mounted base, thus reducing on-site maintenance difficulty and time. The mounting base plate 15 can be made of high-strength metal sheet or flame-retardant engineering plastic, suitable for harsh fire-fighting conditions. The threaded holes can be countersunk to prevent screw protrusion from causing impacts or interference. The connecting device 16 can employ a snap-fit ​​connection, slide rail insertion, or quick-locking structure to further enhance ease of assembly and disassembly.

[0051] refer to Figure 5Preferably, the connecting device 16 includes a sleeve seat 161, a connecting pipe 162, an abutment locking rod 163, and a linkage rod 164. The sleeve seat 161 is disposed on the mounting base plate 15, and a column 1611 is provided inside the sleeve seat 161. The column 1611 and the sleeve seat 161 form an annular space 165. The connecting pipe 162 connects to the host 11 and supports the host 11. The connecting pipe 162 can be inserted into the annular space 165. The abutment locking rod 163 is slidably connected to the column 1611. The locking rod 163 is used to abut and lock the inner wall of the connecting pipe 162 inserted into the annular space 165. The locking rod 163 has a pushed part 1631. The linkage rod 164 is slidably connected to the column 1611, and the sliding path of the linkage rod 164 is consistent with the movement path of the connecting pipe 162. The linkage rod 164 is used to push the pushed part 1631 to slide under the pressure of the connecting pipe 162, thereby driving the locking rod 163 to abut and lock the inner wall of the connecting pipe 162. This arrangement, with the annular insertion space formed by the column 1611 inside the sleeve seat 161, can provide precise insertion positioning and radial limit for the connecting pipe 162, ensuring accurate insertion alignment and high coaxiality during the assembly of the host 11, effectively avoiding problems such as installation offset, tilting, and shaking of the host 11, and providing a stable bearing installation foundation for the signal relay equipment. The system employs a mechanical linkage self-locking structure where the connecting pipe 162 is inserted into and squeezed by the linkage rod 164, and the linkage rod 164 pushes against the locking rod 163. This achieves a one-click assembly effect where insertion and locking are instantaneous. Operators only need to insert the corresponding connecting pipe 162 of the main unit 11 into the annular space 165, and the internal linkage structure will automatically drive the locking action through the insertion stroke. This eliminates the need for additional cumbersome operations such as tightening screws and fastening clips, simplifying the equipment installation and fixing process and improving the efficiency of rapid deployment and emergency installation of equipment on site. This built-in pipe wall abutment locking method provides tight restraint from inside the connecting pipe 162, effectively resisting the risk of loosening caused by vibration and minor impacts at the rescue site, continuously ensuring the stability of the connection between the main unit 11 and the mounting base plate 15, and preventing equipment from loosening, shifting, or falling. Meanwhile, the linkage transmission structure is integrated inside the sleeve seat 161, featuring a compact structure with no exposed moving parts, excellent overall protection, and suitability for the dusty, high-vibration, and complex and harsh working environments of fire rescue operations. It also allows for quick disassembly and separation of the main unit 11, preserving the convenience of independent operation and maintenance and rapid replacement. Specifically, a wear-resistant inclined surface structure can be added to the contact position between the linkage rod 164 and the locking rod 163 to ensure smooth and effortless pushing transmission; an anti-slip and wear-resistant rubber pad can be added to the end of the locking rod 163 to improve the friction between the pipe wall and the locking reliability; the sleeve seat 161 and the connecting pipe 162 can be made of high-strength flame-retardant hard alloy material to improve structural strength and fire safety adaptability.It is understandable that, as a better implementation method, the built-in linkage push-locking structure can be replaced with an external elastic buckle locking structure. The elastic buckle on the outer wall of the connecting pipe 162 cooperates with the slot of the sleeve seat 161 to achieve quick disassembly and locking, which is simpler in structure and lower in production cost. Alternatively, it can be replaced with a rotary snap-fit ​​locking structure, which achieves circumferential locking and limiting by a small rotation after insertion, and has a good anti-vibration and anti-loosening effect. It can also be replaced with a pneumatic jacking locking structure, which relies on a pneumatic pump to drive the jacking rod to abut and lock, which is suitable for working conditions that require frequent disassembly and high-precision locking.

[0052] Preferably, the signal relay device further includes a power supply module 17. This configuration, by incorporating an independent power supply module 17 within the signal relay device, provides a continuous and stable power supply to all functional structures, including the main unit 11, antenna 12, universal adjustment locking device 13, angle display mechanism 14, and communication monitoring unit. Fire and rescue sites are often power outages, ruins, buildings, and enclosed spaces without mains power coverage. The independent power supply module 17 enables the device to operate independently with its own power supply, without relying on external power lines. This supports rapid temporary deployment and mobile networking operations, enhancing the device's adaptability and operational independence in emergency rescue and power outage scenarios. The power supply module 17 can utilize a large-capacity explosion-proof lithium battery, a rechargeable lithium iron phosphate power module, or an integrated energy storage power supply unit, providing overcharge, overvoltage, overheat, and short-circuit protection functions to meet fire-fighting explosion-proof and high-temperature requirements. The power supply module 17 can also be equipped with a power monitoring unit and a low-power alarm unit, allowing operators to monitor the device's power supply status in real time and prepare for power replenishment and equipment rotation in advance.

[0053] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0054] 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 at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fire rescue communication signal blind spot compensation system, characterized in that, include: Multiple signal relay devices are provided, each of which is installed or placed in a signal dead zone. The multiple signal relay devices are connected wirelessly to form a network. Each signal relay device includes a host (11), an antenna (12), a universal adjustment locking device (13), and an angle display mechanism (14). The antenna (12) is connected to the host (11) through the universal adjustment locking device (13) and is supported by the host (11). The universal adjustment locking device (13) is used to adjust and lock the installation angle of the antenna (12). The angle display mechanism (14) is located on the antenna (12) and is used to detect the installation angle of the antenna (12) in real time to provide real-time angle reference for the user. A communication monitoring module is provided, which is wirelessly connected to each signal relay device and is used to monitor the communication status of the network. A network control terminal is wirelessly connected to each of the signal relay devices and is used to control the signal connection status between the signal relay devices.

2. The fire rescue communication signal blind spot compensation system according to claim 1, characterized in that, The antenna (12) is provided with multiple antennas, the universal adjustment locking device (13) is provided with multiple devices, and the angle display mechanism (14) is provided with multiple devices. Each antenna (12) is connected to the host (11) through one of the universal adjustment locking devices (13), and each angle display mechanism (14) is provided on one of the antennas (12).

3. The fire rescue communication signal blind spot compensation system according to claim 1, characterized in that, The universal adjustment locking device (13) includes a spherical hinge seat (131), a spherical hinge rod (132), multiple locking balls (133), and a housing (134). The spherical hinge seat (131) is mounted on the main unit (11). The spherical hinge seat (131) has a spherical space (1311) and multiple receiving slots (1312). The spherical space (1311) extends from the top of the spherical hinge seat (131). Each receiving slot (1312) is located on the side wall of the spherical hinge seat (131), and each receiving slot (1312) is connected to the spherical space (1311) and the external environment. The rod (132) is connected to the antenna (12). The spherical hinge rod (132) is located in the spherical space (1311) and is spherically hinged to the spherical space (1311). Each of the locking balls (133) is located in one of the receiving slots (1312) and can abut and lock the spherical surface of the spherical hinge rod (132) located in the receiving slot (1312). The sleeve (134) is sleeved on the side wall of the spherical hinge seat (131) and is used to abut and drive each of the locking balls (133) to abut and lock the spherical surface of the spherical hinge rod (132) located in the receiving slot (1312).

4. A fire rescue communication signal blind spot compensation system according to claim 3, characterized in that, The housing (134) is provided with an internal thread (1341), and the outer wall of the spherical hinge seat (131) is provided with an external thread (1313). The internal thread (1341) and the external thread (1313) are threadedly engaged.

5. A fire rescue communication signal blind spot compensation system according to claim 4, characterized in that, The universal adjustment locking device (13) further includes at least two stabilizing members (135), which are located on opposite horizontal sides of the spherical hinge seat (131). The two ends of each stabilizing member (135) are connected to the spherical hinge seat (131) and the housing (134), respectively. The stabilizing members (135) are used to prevent the threaded engagement of the internal thread (1341) and the external thread (1313) from loosening due to vibration.

6. A fire rescue communication signal blind spot compensation system according to claim 1, characterized in that, The angle display mechanism (14) includes an indicator rod (141), at least two collars (142), a scale ring (143), and a mounting bracket (144). The two collars (142) are rotatably fitted around the antenna (12). Each collar (142) has a connecting post (1421) on its outer side wall. The two ends of the indicator rod (141) are respectively connected to the connecting posts (1421) on the two collars (142). The length extension direction of the indicator rod (141) is always consistent with the length extension direction of the antenna (12). The mounting bracket (144) has a mounting sleeve. The sleeve (1441) and the first comparison rod (1442) are rotatably sleeved with a connecting post (1421) on one of the collars (142). The first comparison rod (1442) is provided on the sleeve (1441). The length extension direction of the first comparison rod (1442) can form an angle with the length extension direction of the marking rod (141). The scale ring (143) is provided on the first comparison rod (1442) and is used for the user to adjust the angle between the first comparison rod (1442) and the marking rod (141).

7. A fire rescue communication signal blind spot compensation system according to claim 6, characterized in that, The mounting bracket (144) further includes a second comparison rod (1443) and a gravity pendulum (1444). The second comparison rod (1443) is disposed on the mounting sleeve (1441), and the length extension direction of the second comparison rod (1443) is always perpendicular to the length extension direction of the first comparison rod (1442). The gravity pendulum (1444) is connected to one end of the second comparison rod (1443) so that the length extension direction of the second comparison rod (1443) is always consistent with the gravity direction, thereby making the length extension direction of the first comparison rod (1442) always extend horizontally.

8. A fire rescue communication signal blind spot compensation system according to claim 7, characterized in that, The inner side of the collar (142) is provided with a groove (1422), and the outer side wall of the antenna (12) is provided with at least two ring rails (121). The two ring rails (121) are arranged sequentially along the length extension direction of the antenna (12). The groove (1422) is slidably connected to one of the ring rails (121), and the groove (1422) and the ring rail (121) are in sliding damping cooperation.

9. A fire rescue communication signal blind spot compensation system according to claim 1, characterized in that, The signal relay device also includes a mounting base plate (15) and a connecting device (16). The mounting base plate (15) is provided with threaded holes for mounting the mounting base plate (15) to the wall with screws or bolts. The host (11) is detachably connected to the mounting base plate (15) through the connecting device (16).

10. A fire rescue communication signal blind spot compensation system according to claim 9, characterized in that, The connecting device (16) includes a sleeve seat (161), a connecting pipe (162), an abutment locking rod (163), and a linkage rod (164). The sleeve seat (161) is located on the mounting base plate (15). A column (1611) is provided inside the sleeve seat (161), and the column (1611) and the sleeve seat (161) form an annular space (165). The connecting pipe (162) is connected to the host (11) and carries the host (11). The connecting pipe (162) can be inserted into the annular space (165). The abutment locking rod (163) is slidably connected to the column (1611). The abutment locking rod (163) is used to abut and lock the inner wall of the connecting tube (162) inserted into the annular space (165). The abutment locking rod (163) has a pushed part (1631). The linkage rod (164) is slidably connected to the column (1611), and the sliding path of the linkage rod (164) is consistent with the movement path of the connecting tube (162). The linkage rod (164) is used to push the pushed part (1631) to slide under the pressure of the connecting tube (162), thereby driving the abutment locking rod (163) to abut and lock the inner wall of the connecting tube (162).

Images