43 results about "Peephole" patented technology

1. Name of the product in this design: Desktop Charger (BP-4). 2. Purpose of this design: To charge a video peephole. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model discloses a portable filter pressure relief observer which comprises a sight glass, and a one-way valve is arranged at an outlet of the sight glass to prevent oil from flowing backwards. A portable emptying valve is arranged at the bottom of the sight glass, so that timely emptying after pressure relief of the filter is facilitated, and next observation is not affected. The problems that an existing sight glass is not tight in sealing, glass is fragile, oil flows backwards and maintenance is difficult are solved, and the process safety and the convenience of equipment maintenance are improved.

The utility model discloses an unattended monitoring device for mixed bed resin, which comprises a visual sensor, a micro sensor, a wireless signal transceiving processing module and a monitoring center, and the mixed bed comprises a first high-speed mixed bed and a second high-speed mixed bed, visual sensors are arranged on observation windows of the first high-speed mixed bed and the second high-speed mixed bed, wireless signal transceiving processing modules are arranged on the side walls, micro sensors are arranged on the bottom walls, and the visual sensors and the micro sensors are connected to the wireless signal transceiving processing modules through connecting wires. The wireless signal transceiving processing module comprises a wireless module and a signal processing module, and data collected by the visual sensor and the micro sensor are processed by the signal processing module and then transmitted to the monitoring center server through the wireless module. According to the utility model, a manual monitoring peephole is optimized into a visual and intelligent monitoring system, manual judgment on whether the resin bed fails and is put into operation is optimized into full-automatic intelligent identification judgment, and manual regeneration of failed resin is optimized into full-automatic intelligent regeneration.

The invention discloses a flash furnace nozzle high-temperature monitoring device, and relates to the field of flash furnace nozzle high-temperature monitoring, the flash furnace nozzle high-temperature monitoring device comprises a monitoring assembly, the monitoring assembly comprises a shell, a camera is installed in the shell, the tail end of the camera is fixedly connected through a connecting piece, the connecting piece is a pipe fitting, and the connecting piece is connected with the shell. A wire used for guiding connection of the camera is electrically connected with a circuit board installed at the tail end of the shell. The special high-temperature-resistant alloy material is adopted as the camera probe protection cylinder, so that the camera probe protection cylinder has good corrosion resistance and high-temperature resistance, and can resist the high temperature of 1600 DEG C under the condition that a cooling medium meets operation conditions. As the camera probe protection cylinder adopts a pinhole imaging technology, and a peep hole at the front end of the camera probe protection cylinder is designed to be 6mm, dust is difficult to enter the camera probe protection cylinder, and the camera probe protection cylinder has good positive pressure resistance and thermal radiation resistance. Therefore, the maintenance workload of the system is greatly reduced. In addition, a water-cooling type or air-cooling type camera probe protection cylinder can be selected according to the condition of a cooling medium of a user.

The present invention discloses a smart lock peephole lever structure and a smart lock. The smart lock includes a face shell, a face cover disposed on the face shell, and a rotating shaft disposed within the face shell. The smart lock peephole lever structure includes a peephole block, a peephole cam, and a return spring. The peephole block is rotatably disposed on the face cover. The upper end of the peephole cam is clamped within the face shell and can move up and down relative to the face shell under the drive of the peephole block. The return spring is sleeved on the peephole cam. The rotating shaft is provided with a groove corresponding to the peephole cam. The bottom of the peephole block contacts the top of the peephole cam. Compared with the prior art, the present invention is simpler and more convenient to assemble. When the peephole block is rotated, the force is balanced, the sliding is smooth, and the hand feel is good.

The utility model discloses a reduction furnace sight glass flow guide ring, which relates to the technical field of sight glass flow guide rings, and comprises a reduction furnace sight glass flow guide ring body and a reduction furnace sight hole body, the reduction furnace sight glass flow guide ring body is divided into a flow guide ring outer ring and a flow guide ring inner ring, the flow guide ring outer ring is arranged on the outer side of the flow guide ring inner ring, and the flow guide ring outer ring is arranged on the outer side of the flow guide ring inner ring. According to the flow guide ring for the sight glass of the reduction furnace, purging hydrogen and a mixer in the reduction furnace are subjected to collision reverse blowing isolation at the necking-down position of the inner ring of the flow guide ring, and mixed gas (such as chlorosilane, hydrogen and hydrogen chloride in the CVD reduction furnace) on the outer side of the inner ring of the flow guide ring is purged; then the sight glass is used for purging hydrogen to reversely blow the mixed gas into the reduction furnace, and finally, as the mixed gas cannot be in direct contact with the sight glass, silicone oil can be prevented from being generated on a quartz lens of the sight glass, and the quartz lens of the sight glass is ensured to be clean and clear.

The present application provides a method and system for preventing and controlling roof caving disasters in coal mining faces. The method includes: obtaining geological information of each rock stratum corresponding to the cut-through of the coal mining face by drilling peepholes; based on the geological information, drilling a plurality of pressure relief holes on the side of the coal pillar corresponding to the cut-through, and pre-cracking the hard roof rock stratum through pressure relief treatment to convert the roof at the cut-through from a beam structure to a cantilever structure; setting monitoring equipment and arranging multiple groups of buffer cushions on the floor of the goaf; combining the impact data collected by the monitoring equipment during roof caving, the initial caving step distance of the roof under the cantilever structure and the relevant parameters of the cut-through to determine whether to adjust the buffer cushions. This method can reduce the initial caving step distance of the roof and relieve the huge dynamic pressure generated during roof caving, comprehensively prevent and control roof caving disasters from multiple angles, and improve the prevention and control effect of roof caving disasters.

The invention discloses a mechanical drilling speed prediction method based on CPLNet. The method comprises the steps that drilling parameters are collected and preprocessed; the drilling parameters comprise bit pressure, rotating speed, torque, well depth, natural gamma, resistivity, pumping pressure, displacement, rock density and drilling fluid density; extracting spatial features and time features of the preprocessed drilling parameters; performing channel dimension splicing on the spatial features and the time features to obtain combined features; performing fusion weighting on the combined features to obtain fusion features; and the mechanical drilling speed is predicted through a full-connection network based on the fusion features, and a drilling speed prediction value is obtained. According to the method, Peephole-LSTM and CBAM attention mechanisms are combined, feature association and long memory are captured, long-term dependence is overcome, and the drilling speed is accurately predicted.

The utility model discloses a monitoring device and a door, and relates to the technical field of monitoring. The monitoring device comprises a monitor, a cover plate A and a cover plate B. The cover plate A and the cover plate B are parallel to each other and are coaxially arranged, and the monitor is installed on the side wall, away from the cover plate A, of the cover plate B; the inner threaded sleeve column is integrally arranged at the center of the side wall, close to the cover plate A, of the cover plate B and extends towards the cover plate A. According to the monitoring device and the door, through the matched design of the cover plate A, the cover plate B, the internal thread sleeve column, the external thread rod and the rotary knob, the monitor can be installed in the positioning installation groove and the cat eye hole in the door body, installation can be completed through the cat eye hole in a traditional door, installation is simple and efficient, disassembly and assembly need to be completed on the indoor door side, and safety and reliability are achieved; compared with a monitoring device integrated in the intelligent door lock, the intelligent door lock monitoring device has the advantages that the size of the intelligent door lock monitoring device allows longer endurance and use of a higher-definition camera assembly.

The present invention relates to a method, system, electronic device, and storage medium for predicting the remaining life of a generator, comprising: obtaining historical data of a generator device; identifying the operating condition of the generator device at each moment using a preset operating condition identification method based on the historical data; preprocessing the operating condition at each moment to obtain a data sample set; training the data in the data sample set using an improved CNN module and an improved LSTM module to obtain a hybrid fault prediction model; the improved CNN module is an attention-based CNN module, and the improved LSTM module is an LSTM module with a peephole and an update gate; and predicting the remaining life of the generator based on the hybrid fault preset model. The present invention overcomes the problems of existing prediction methods, such as insensitivity to fault characteristics, multiple parameters, and slow training speed, by effectively extracting multi-parameter features. Furthermore, the multi-feature data can be used to accurately predict equipment faults, reducing long-term downtime costs, optimizing maintenance cycles, and improving early fault detection.

The utility model relates to the technical field of stoving varnish processing, and particularly discloses a furniture board surface treatment device for stoving varnish processing, which comprises an isolation mechanism, and a board surface polishing mechanism, a feeding mechanism and a dust falling mechanism are respectively arranged in the isolation mechanism; the feeding mechanism and the dust falling mechanism are arranged on the two sides of the plate surface grinding mechanism correspondingly. By means of the isolation room structure, the surrounding environment can be protected when surface treatment is carried out on a plate, a door plate structure of the isolation room can facilitate normal access of workers, the plate can be placed on a feeding table, and a peephole is matched with a glass plate, so that the situation that dust overflows can be avoided while internal plate machining and equipment operation can be observed, and the working efficiency is improved. And a power source of a second motor is switched on, the second motor can drive a threaded rod to rotate through a second rotating shaft, while the threaded rod rotates, a threaded sleeve moves, a limiting rod slides in a limiting hole, the threaded sleeve can drive a material pushing plate to horizontally move, and therefore the plate can be stably pushed.

Assemblies, sensors, methods of attachment, communication networks, and operational processes of a door-mounted camera apparatus with two integrated camera modules, for use with a door's peephole viewer. Some embodiments include a door bracket for attaching the camera apparatus to the door using removable adhesive or embedded magnets. Embodiments may include a movable mirror assembly which may be operated by a hand or by electrically powered mechanical actuator. Some embodiments include a peephole viewer apparatus with integrated sensors. Embodiments can include a digital display for viewing the camera's video output. Some embodiments can include a wired or wireless external sensor module which may detect whether a person is present in front of the door.

The utility model relates to the field of fingerprint locks, in particular to a handle type fingerprint lock which comprises an intelligent lock body, a visual cat eye, a handle, a fingerprint unlocking touch area, an external charging port, a pressing plate, a large-capacity battery and a detachable fixing plate. The handle is installed in the middle of the front side of the intelligent lock body, the fingerprint unlocking touch area is arranged on the front side of the handle, the external charging port is formed in the lower right end of the front side of the intelligent lock body, and the problem that the intelligent lock cannot be unlocked when losing power can be solved by installing the external charging port; and the pressing plate is installed at the lower end of the front side of the intelligent lock body, the large-capacity battery is installed on the inner side of the intelligent lock body, the cruising ability of the intelligent lock can be guaranteed by installing the large-capacity battery, and the detachable fixing plate is installed on the rear side of the large-capacity battery.

The utility model discloses an anti-theft wooden door with an alarm function, which comprises a door frame, and a wooden door body is movably mounted in the door frame through hinges. A door lock is mounted on one side of the wooden door body; an observation hole is formed in the wooden door body; a cat eye is detachably mounted in the observation hole; an anti-peeping alarm device is arranged on one side of the cat eye in the observation hole; the anti-peeping cat eye effectively prevents lawbreakers from peeping indoor conditions through the cat eye, once someone tries to peep, the alarm immediately rings, the lawbreakers can be frightened, indoor people can be reminded in time, and the safety of families or places is improved; the wooden door body is of a multi-layer structural design, materials of all layers are matched with one another, the sound insulation performance, the heat preservation performance and the like of the door are enhanced, the overall strength and stability of the door are improved, the door is more durable, the service life of the door is prolonged, and the frequency and cost for replacing the door are reduced; the device is simple in structure, convenient to operate and worthy of popularization.

The utility model belongs to the technical field of tuyere peepholes, and particularly discloses a mechanism for inhibiting carbon deposition of a tuyere peephole of a hydrogen-carbon-rich blast furnace, which comprises a connecting pipe, a valve seat arranged on the connecting pipe, threads arranged at one end of the connecting pipe, a nut in threaded connection with the connecting pipe, and a lantern ring arranged on the inner side of the nut. A glass peeping sheet is placed between the connecting pipe and the lantern ring, a vertical pipe is communicated with the connecting pipe between the nut and the valve seat, a nitrogen pipe is communicated with the vertical pipe, and a valve is arranged on the nitrogen pipe. The problem that the labor intensity of a water watching worker is increased due to the fact that carbon powder blocks a tuyere peephole is solved. According to the utility model, generated carbon deposits are blown into the blast furnace through nitrogen purging, and the carbon deposits are prevented from blocking the peephole, so that the phenomenon that the peephole of the tuyere is frequently blocked by the carbon deposits of the peephole of the tuyere is avoided, and the labor intensity of the peephole of the tuyere is greatly reduced; meanwhile, gas leakage is reduced, so that the risk of gas poisoning caused by inspecting the hydraulic tuyere is reduced.

To provide a door scope equipped with a blade opening / closing device.SOLUTION: A blade opening / closing device 50 is fitted in a door scope having a housing, a first hole provided in a first surface of the housing, and a second hole provided in a second surface of the housing opposite the first surface. The blade opening / closing device 50 includes blades 52 and an actuator 51 that positions the blades at a first position where the blades block a gap between the first hole and the second hole, or at a second position where the blades do not block the gap between the first hole and the second hole.SELECTED DRAWING: Figure 6

The utility model relates to smelting equipment technical field, the utility model provides a kind of visual oxygen lance for blast furnace blow-in, it includes: oxygen lance shell, the middle part of oxygen lance shell is equipped with flow channel, the bottom end of oxygen lance shell is fixedly connected with the oxygen transmission pipe and compressed air transmission pipe communicated with flow channel;Feedback board, the middle part of feedback board is embedded with feedback lens, the edge of the side of feedback board close to oxygen lance shell is fixedly connected with multiple lock rods, the end of oxygen lance shell close to feedback board is equipped with quick-mounting assembly, quick-mounting assembly is used for cooperating lock rod positioning feedback board;Protective assembly, protective assembly is assembled in the side of feedback board away from lock rod. Through the above technical scheme, the technical problem that the peephole mirror is lacking in effective protective measures in the unused state in the prior art, when contacting with the peephole mirror outside, the peephole mirror is easily scratched, and is easily attached by dust, affects the clarity of peephole mirror is solved.

The present invention discloses a visual inspection device with a defect position calibration function, which relates to the field of visual inspection technology and includes: a machine body, a storage cavity, a detection device, a supporting device and a calibration device, wherein the detection device is used for visual inspection, the supporting device is used to support the machine body in a pipeline, the calibration device is arranged on the outer wall of the pipeline, and the calibration device is used to calibrate the defect position; the detection device performs defect detection on the inner wall of the pipeline, thereby avoiding the staff from manually detecting the inner wall of the pipeline through a peephole, thereby improving the detection efficiency; the movement of the calibration device drives the detection device to move along the central axis of the pipeline, thereby realizing the detection of the inner wall of the pipeline during the movement, thereby improving the efficiency of pipeline detection; when the inner wall of the pipeline is defective, the calibration device performs calibration on the outer wall of the pipeline corresponding to the defective position inside the pipeline, thereby facilitating the staff to quickly locate the defective position, thereby saving maintenance time.

A dugout is provided in the form of a rapid-deployment earth shelter 1 having a protective roof 2 against plunging fire. The protective roof 2 is formed using a tree root system 16. Clay soil is cut out from beneath the tree root system 16 such as to form an individual casemate 3 for providing temporary shelter to a soldier. The casemate 3 has a vertical manhole 4. The chamber of the manhole 4 connects to the chamber of the casemate 3 in such a way that a seat / step 9 is formed in the bottom part of the manhole 4 at the entrance to the chamber of the casemate 3. The upper edge of the manhole 4 is level with the ground and is provided with a camouflage cover 5. The camouflage cover 5 is designed so that detachable parts thereof can be used to form a slidable peephole / vent 8 through which air can enter and portable observation and warning equipment 17 can be extended. The dugout provides more reliable protection against detection and plunging fire.

The present invention provides a real-time monitoring system for GIS knife contact status, comprising a plurality of transparent peepholes mounted on the device and end caps for covering the transparent peepholes, as well as a plurality of camera unit groups located outside the device and within the transparent peepholes. Each camera unit group corresponds to a knife contact located within the device and is used to capture monitoring images of the corresponding knife contact. The plurality of camera unit groups are connected to an external monitoring system to transmit monitoring images containing the knife contacts to the external monitoring system. This solution monitors contact status through direct monitoring, avoiding the problem of misjudgment of status. The system can be simply modified from the existing system and installed externally, eliminating the need to worry about high voltage within the device and eliminating safety issues. The solution is low-cost and has minimal implementation pressure.

This utility model belongs to the field of door lock peephole technology, specifically relating to an overall structure of a door lock peephole, including: a smart lock and a peephole mechanism. A receiving groove for accommodating the peephole mechanism is provided on the top of one side of the smart lock. A rotating component rotatably connected to the bottom of the peephole mechanism is provided in the receiving groove. A driving component is provided between the top of the inner side of the peephole mechanism and the inner wall of the receiving groove. The driving component, based on its actuation, causes the peephole mechanism to be pushed outwards to expose itself or pulled inwards to hide itself on the rotating component. The rotating component includes a rotating seat with a rotating shaft, which is installed on the outer side of the bottom of the receiving groove. This utility model, through the addition of the rotating component, driving component, and peephole mechanism, allows the peephole mechanism to be hidden and stored in the receiving groove when not in use, thereby preventing dust from falling onto the peephole mechanism when it is not in use.

The utility model relates to the technical field of vacuum smelting, in particular to a vacuum furnace peephole lens cleaning device and a vacuum furnace. The utility model provides a vacuum furnace peephole lens cleaning device which comprises a first cleaning part and a second cleaning part, the first cleaning part comprises a first driving mechanism and a first cleaning assembly, the first cleaning assembly is connected to the first driving mechanism, and the first driving mechanism is used for driving the first cleaning assembly to move within the range of a to-be-cleaned peephole lens. The first cleaning assembly is used for contacting and cleaning a to-be-cleaned peephole lens; the second cleaning part comprises a second driving mechanism and a second cleaning assembly, the second cleaning assembly is connected to the second driving mechanism, the second driving mechanism is used for driving the second cleaning assembly to move within the range of the to-be-cleaned peephole lens, and the second cleaning assembly is used for blowing the to-be-cleaned peephole lens. The metal volatile matter attached to the peephole lens can be effectively cleaned, the cleanliness of the lens is guaranteed, and the service life of the lens is prolonged.

The application provides a multifunctional safe security door with variable storage space, belonging to the technical field of security doors, comprising a fixed frame, an outer door frame, an inner door frame and an observation assembly; the fixed frame is fixed on the door hole wall of a room; the lower end of the fixed frame is provided with a lower storage plate, which has the freedom of stretching and contracting in the vertical direction; the outer door frame is arranged on the outer side of the fixed frame away from the room, and the outer door frame is provided with a glass door; the inner door frame is arranged on the inner side of the fixed frame facing the room and is connected with the fixed frame in sliding mode along a first direction; the lower end of the inner door frame is provided with an upper storage plate arranged in extension along a second direction; the inner door frame is provided with a security door; the observation assembly comprises a peephole arranged on the security door and facing the glass door, and an LED screen fixed on the glass door, which is arranged on the inner side of the glass door facing the room. The multifunctional safe security door with variable storage space provided by the application can adjust the storage space, can adapt to the size of different door hole walls, and has better safety.

The present invention discloses an anti-peephole opening structure for an intelligent lock, which includes a lock body housing, a handle head, a handle reversing head, and an inner handle. The handle head is rotatably installed inside the lock body housing. The inner handle extends into the interior of the lock body housing from the outside of the side of the lock body housing facing the indoor side and is coaxially fixedly connected to the handle head. The handle reversing head is rotatably installed inside the lock body housing. The handle reversing head and the handle head are coaxially opposed and can rotate relative to each other. A clutch pin is slidably installed on the handle head or the handle reversing head at a set distance. An eccentric clutch slot is provided on the handle reversing head or the handle head. A theft-proof dial is also slidably installed on the lock body housing. The operating part of the theft-proof dial extends out of the surface of the lock body housing facing the indoor side. The movement of the theft-proof dial can drive the clutch pin to slide so that it is inserted into or withdrawn from the clutch slot. The structure of the present invention is simple and convenient to operate, and can effectively prevent outsiders from hooking the inner handle through the peephole of the anti-theft door to open the door, improving the security of the door lock.

The invention relates to the technical field of nuclear waste treatment, in particular to a nuclear waste pipe fitting treatment device which comprises a horizontal moving supporting frame and a component pool, a rotating mechanism is arranged at the top of the horizontal moving supporting frame, the horizontal moving supporting frame is in butt joint with an X-axis moving assembly on site, and it is guaranteed that the device can move and be positioned on any position on the horizontal plane; the device comprises a rotating mechanism, a lifting mechanism is arranged at the top of the rotating mechanism, the rotating mechanism drives the whole device to rotate along a set center shaft, a pulling and shearing assembly is arranged at the top of the lifting mechanism, a pipe fitting simulation body is arranged at the bottom of the rotating mechanism, the pulling and shearing assembly comprises an outer shielding body, and the front face of the outer shielding body is connected with a placement frame. The top of the placing frame is connected with an outer camera, and the front face of the outer shielding body is fixedly connected with a shielding squint window. According to the nuclear waste pipe fitting treatment device, through the rotating and lifting mechanisms, the problem that the device interferes with a shelf in a water pool is solved, and the treatment efficiency of the device is improved.

To provide a connection structure which connects a molding and a door mirror via a connection plug, thereby enabling suppression of occurrence of a clearance and a step between both parts.SOLUTION: A molding 11 has a first insertion hole 17 in which one end part 22a of a connection plug 22 in a longer direction can be inserted. A first lock hole 18 is formed in one side wall 24 constituting the first insertion hole. A base member 19 has a second insertion hole 20 in which the other end part 22b of the connection plug can be inserted, and a second lock hole 21 is formed in one side wall. One end part of the connection plug is provided with an elastically deformable first lock part 26 of which an inclined apical surface 26c is locked to a hole edge part 18a of the first lock hole when inserted into the first insertion hole, and an outer periphery of the other end part is provided with an elastically deformable second lock part 27 of which an inclined apical surface 27c is locked to a hole edge part 21a of the second lock hole when inserted into the second insertion hole.SELECTED DRAWING: Figure 8

The utility model relates to the technical field of drilling peeping instruments, in particular to an in-hole fixing and stabilizing auxiliary device of a drilling peeping instrument. The problems that in the using process of a traditional drilling peeping instrument, a probe is inconvenient to protect, the stability and quality of pictures and videos shot by the probe are inconvenient to ensure, the practical performance of the device is affected, and therefore the reliable and stable performance of a camera in the using process is inconvenient to improve are solved. The utility model provides an in-hole fixing and stabilizing auxiliary device for a drilling peeping instrument. The in-hole fixing and stabilizing auxiliary device comprises a supporting base, a through hole, a peeping instrument camera rod, a mounting assembly, a sliding assembly, a positioning assembly, a fixing assembly and a push-pull assembly. Compared with a traditional drilling peeping instrument in the using process, the drilling peeping instrument is provided with the positioning structures and the fixing structures, supporting and positioning are carried out through the multiple sets of positioning structures, assembling and fixing are carried out through the fixing structures, stable positioning of the camera rod of the peeping instrument is achieved, and the drilling peeping instrument is convenient to use. And the stability and reliability of the camera in the use process are ensured.

The utility model discloses an intelligent door with an automatic induction lighting function, which comprises a door body, a lighting component is arranged on the front surface of the door body close to the top, a human body inductor is arranged below the lighting component, and an inner side lighting lamp is arranged on the back surface of the door body below the lighting component. A control box assembly is arranged below the inner side illuminating lamp, and an intelligent door lock is arranged at the door opening end of the door body. The intelligent door has the advantages that the problems that an existing intelligent door lacks an induction lighting function, a door handle or a door lock is difficult to accurately find or operate under the condition that corridor lighting facilities at night are imperfect or lighting is not available, daily access convenience of a user is reduced, the user is difficult to pass under the environment that light outside the door is weak, and the user experience is poor are effectively solved. And the door mirror can distinguish the face of the visitor outside the door or the surrounding environment condition, so that the safety protection of the user and the acquisition of external information are greatly hindered.

1. Name of the product in this design: Desktop Charger (J700). 2. Purpose of this design: To charge a video peephole. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model discloses an enhanced high-safety anti-theft door, relates to the technical field of anti-theft doors, and aims to solve the problems that the anti-theft door is easy to open from the inside after a door mirror is detached, and the anti-theft door is not easy to give an alarm to residents and residents when being operated by lawbreakers, the enhanced high-safety anti-theft door comprises a door frame, and an anti-theft door main body is mounted on the inner wall of one side of the door frame through hinges; a blocking mechanism is arranged at the position, corresponding to the cat eye, of the inner end wall of the anti-theft door body. According to the utility model, through the cooperation of the blocking mechanism and the locking assembly, the insertion block is inserted into the insertion slot to limit the blocking block, the locking rod is inserted into the locking hole to further lock and fix the blocking block, and through the cooperation of the moving plate and the alarm, the moving plate drives the top column to press the alarm after being stressed. And the alarm gives an alarm while buzzing, so that the problems that the security door is easy to open from the inside after the door mirror is detached and the security door is not easy to give an alarm to residents and residents when being operated by lawbreakers are effectively avoided.