Automotive repair forced power-off alarm device to prevent accidental activation
By combining physical latches and magnetic switch alarm devices in automotive repair, the problem of insufficient positive electrode insulation protection in automobiles is solved, enabling forced power-off and timely alarms, thus improving the safety and stability of the repair process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN YUXI IND FINANCE & TRADE SCHOOL
- Filing Date
- 2025-07-18
- Publication Date
- 2026-06-30
AI Technical Summary
In the process of automobile repair, the existing technology lacks insulation protection for the positive terminal of the car, which leads to improper operation of the power-on and poses safety hazards. In addition, there is a lack of effective anti-accidental contact devices.
The design combines a physical latch with a magnetic switch alarm device. The physical latch provides a robust protective barrier, while the alarm is triggered by sound when an unauthorized intrusion occurs. The alarm can be deactivated using a remote control.
It provides dual security to prevent unauthorized access and provides timely alerts, improving safety and equipment stability during the automotive repair process.
Smart Images

Figure CN224437002U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a workpiece clamping device, specifically to a forced power-off alarm device for automobile repair to prevent accidental activation. Background Technology
[0002] Most automobiles and new energy vehicles are equipped with low-voltage maintenance switches on their low-voltage circuits. Manual operation of these switches triggers a low-voltage signal, which then controls the high-voltage system to cut off the high-voltage output. In actual repair operations, auto mechanics typically disconnect the battery's positive terminal directly. While a few mechanics may use electrical tape or insulating sleeves to insulate the positive terminal, most do not properly insulate and protect it from electrical surges. According to company surveys and site visits, auto mechanics lack awareness and understanding of electrical surge prevention. Some employees simply use warning lines and signs, without any mandatory safety switches or locks on the battery terminals. Summary of the Invention
[0003] To address the aforementioned problems in the existing technology, this utility model provides a vehicle maintenance forced power-off alarm device that forcibly locks the power supply system during vehicle maintenance, preventing anyone other than maintenance personnel from powering on the vehicle under maintenance. This device combines physical locking with an audible alarm function and can be deactivated via remote control.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a forced power-off alarm device for automobile maintenance to prevent accidental activation, comprising a lower housing 1 and an upper cover 2 with an openable design, a physical lock and an alarm device, wherein the lower housing 1 and the upper cover 2 are both 3D printed, and the upper part of one side of the lower housing 1 is hinged to one side of the upper cover 2 to form a box with a hollow cavity.
[0005] Physical latches are provided on the opposite side of the lower housing 1 and the upper cover 2, which are opposite to the hinge side. The upper cover 2 and the lower housing 1 are locked by the physical latches, and a handle is installed on the top of the upper cover 2. A semi-circular hole is provided on the upper part of the side wall adjacent to the hinge side of the lower housing 1. A semi-circular hole is also provided on the side wall of the upper cover 2 at the corresponding position of the lower housing 1. After the upper cover 2 and the lower housing 1 are closed, the openings of the two semi-circular holes abut against each other, forming a wire hole 3 in the middle.
[0006] The alarm device includes a power supply, a magnetic switch, a controller 5, and a siren. A receiving groove 4 is provided at the bottom of the lower housing 1 to house the controller 5. The magnetic switch includes a reed switch 7 and a magnet 9. A groove A6 is formed on the side wall of the lower housing 1 on the opening side, and the reed switch 7 is embedded in the groove A6. A groove B8 is formed on the corresponding side wall of the upper cover 2, and the magnet 9 is embedded in the groove B8. The power supply is connected to the siren through the reed switch 7. The reed switch 7 is connected to the control circuit of the controller 5 through a wire. When the upper cover 2 is closed, the magnet 9 of the upper cover 2 attracts the reed switch 7 of the lower housing 1, and the power supply is not connected. When the upper cover 2 is opened, the reed switch 7 is released from the magnet 9, causing the normally open reed switch 7 to close, the circuit is connected, and the siren is activated.
[0007] The physical latch is provided with a locking opening and a locking ring on the opposite side of the hinge side on the lower housing 1 and the upper cover 2, respectively.
[0008] Furthermore, the physical latch includes protrusions 11 located on the lower housing 1 and the upper cover 2, which are arranged in parallel and have through holes 10. When the upper cover 2 is closed, the locking ring 12 passes through the through holes 10 on the protrusions 11 of the lower housing 1 and the upper cover 2 to achieve physical locking.
[0009] When it is necessary to operate the battery, disconnect the terminal from the battery and place the terminal 13 into the box consisting of the lower housing 1 and the upper cover 2. The terminal wire 13 passes through the wire hole 3 of the box. Cover the upper cover 2, lock the physical lock, and turn on the alarm device.
[0010] Beneficial Effects: This application uniquely combines a physical latch with a magnetic switch alarm device. The physical latch provides a robust protective barrier against unauthorized access. The alarm device, upon encountering unauthorized intrusion, immediately triggers an audible alarm, effectively deterring potential threats and alerting relevant personnel. This dual-protection design not only enhances overall security but also ensures stable equipment operation. The alarm can be deactivated using a dedicated electronic remote control. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the box structure of this utility model.
[0012] Figure 2 This is a schematic diagram of the structure of this utility model.
[0013] Figure 3 This is a schematic diagram of the structure of this utility model.
[0014] In the diagram: lower housing 1, upper cover 2, wire hole 3, receiving groove 4, controller 5, groove A6, reed switch 7, groove B8, magnet 9, through hole 10, protrusion 11, locking ring 12, wiring 13. Detailed Implementation Plan
[0015] The present invention will now be described in detail with reference to specific embodiments. Example 1
[0016] like Figure 1 , 2 As shown in Figure 3, a forced power-off alarm device for automobile maintenance includes a lower housing 1 and an upper cover 2 with an openable design, a physical lock and an alarm device. Both the lower housing 1 and the upper cover 2 are 3D printed. The upper part of one side of the lower housing 1 is hinged to one side of the upper cover 2 to form a box with a hollow cavity.
[0017] Physical latches are provided on the opposite sides of the lower housing 1 and the upper cover 2, respectively, which are provided with a locking port and a locking ring on the opposite sides of the lower housing 1 and the upper cover 2. The upper cover 2 and the lower housing 1 are locked by the physical latches, and a handle is installed on the top of the upper cover 2. A semi-circular hole is provided on the upper part of the side wall adjacent to the hinge side of the lower housing 1, and a semi-circular hole is also provided on the side wall of the upper cover 2 at the corresponding position of the lower housing 1. After the upper cover 2 and the lower housing 1 are closed, the openings of the two semi-circular holes abut against each other, forming a wire hole 3 in the middle.
[0018] The alarm device includes a power supply, a magnetic switch, a controller 5, and a siren. A receiving groove 4 is provided at the bottom of the lower housing 1 to house the controller 5. The magnetic switch includes a reed switch 7 and a magnet 9. A groove A6 is formed on the side wall of the lower housing 1 on the opening side, and the reed switch 7 is embedded in the groove A6. A groove B8 is formed on the corresponding side wall of the upper cover 2, and the magnet 9 is embedded in the groove B8. The power supply is connected to the siren through the reed switch 7. The reed switch 7 is connected to the control circuit of the controller 5 through a wire. When the upper cover 2 is closed, the magnet 9 of the upper cover 2 attracts the reed switch 7 of the lower housing 1, and the power supply is not connected. When the upper cover 2 is opened, the reed switch 7 is released from the magnet 9, causing the normally open reed switch 7 to close, the circuit is connected, and the siren is activated.
[0019] When it is necessary to operate the battery, disconnect the terminal from the battery and place the terminal into the box consisting of the lower housing 1 and the upper cover 2. The terminal wire 13 passes through the wire hole 3 of the box. Cover the upper cover 2, lock the physical lock, and turn on the alarm device. Example 2
[0020] like Figure 1 , 2As shown in Figure 3, a forced power-off alarm device for automobile maintenance includes a lower housing 1 and an upper cover 2 with an openable design, a physical lock and an alarm device. Both the lower housing 1 and the upper cover 2 are 3D printed. The upper part of one side of the lower housing 1 is hinged to one side of the upper cover 2 to form a box with a hollow cavity.
[0021] Physical latches are provided on the opposite side of the lower housing 1 and the upper cover 2, respectively, opposite the hinge side. The physical latches include protruding pieces 11 with through holes 10 and arranged in parallel on the lower housing 1 and the upper cover 2. When the upper cover 2 is closed, the locking ring 12 passes through the through holes 10 on the protruding pieces 11 of the lower housing 1 and the upper cover 2 to lock the upper cover 2 and the lower housing 1. A handle is installed on the top of the upper cover 2. A semi-circular hole is provided on the upper part of the side wall adjacent to the hinge side of the lower housing 1. A semi-circular hole is also provided on the side wall of the upper cover 2 at the corresponding position of the lower housing 1. After the upper cover 2 and the lower housing 1 are closed, the openings of the two semi-circular holes abut against each other, forming a wire hole 3 in the middle.
[0022] The alarm device includes a power supply, a magnetic switch, a controller 5, and a siren. A receiving groove 4 is provided at the bottom of the lower housing 1 to house the controller 5. The magnetic switch includes a reed switch 7 and a magnet 9. A groove A6 is formed on the side wall of the lower housing 1 on the opening side, and the reed switch 7 is embedded in the groove A6. A groove B8 is formed on the corresponding side wall of the upper cover 2, and the magnet 9 is embedded in the groove B8. The power supply is connected to the siren through the reed switch 7. The reed switch 7 is connected to the control circuit of the controller 5 through a wire. When the upper cover 2 is closed, the magnet 9 of the upper cover 2 attracts the reed switch 7 of the lower housing 1, and the power supply is not connected. When the upper cover 2 is opened, the reed switch 7 is released from the magnet 9, causing the normally open reed switch 7 to close, the circuit is connected, and the siren is activated.
[0023] When it is necessary to operate the battery, disconnect the terminal from the battery and place the terminal 13 into the box consisting of the lower housing 1 and the upper cover 2. The terminal wire 13 passes through the wire hole 3 of the box. Cover the upper cover 2, lock the physical lock, and turn on the alarm device.
Claims
1. A forced power-off alarm device for automobile maintenance to prevent accidental activation, characterized in that: It includes a lower shell (1) and an upper cover (2) with an openable design, a physical lock and an alarm device. The lower shell (1) and the upper cover (2) are both 3D printed. The upper part of one side of the lower shell (1) is hinged to the upper cover (2) to form a box with a hollow cavity. Physical latches are provided on the opposite side of the lower housing (1) and the upper cover (2) to the hinge side. The upper cover (2) and the lower housing (1) are locked by the physical latches. A semi-circular hole is provided on the upper part of the side wall adjacent to the hinge side of the lower housing (1). A semi-circular hole is also provided on the side wall of the upper cover (2) at the corresponding position of the lower housing (1). After the upper cover (2) and the lower housing (1) are closed, the openings of the two semi-circular holes abut against each other, forming a wire hole (3) in the middle. The alarm device includes a power supply, a magnetic switch, a controller (5), and a siren. The bottom of the lower housing (1) is provided with a receiving groove (4) for placing the controller (5) of the alarm device. The magnetic switch includes a reed switch (7) and a magnet (9). A groove A (6) is provided on the side wall of the opening side of the lower housing (1), and a reed switch (7) is embedded in the groove A (6). A groove B (8) is provided on the side wall of the upper cover (2) at the corresponding position, and a magnet (9) is embedded in the groove B (8). The power supply is connected to the siren through the reed switch (7), and the reed switch (7) is connected to the control circuit of the controller (5) through a wire.
2. The automotive maintenance forced power-off alarm device for preventing accidental activation according to claim 1, characterized in that: The physical latch is provided with a locking port and a locking ring on the opposite side of the hinge side on the lower housing (1) and the upper cover (2).
3. The automotive maintenance forced power-off alarm device to prevent accidental activation according to claim 1, characterized in that: The physical lock includes protrusions (11) with through holes (10) and arranged in parallel on the lower housing (1) and the upper cover (2) respectively. When the upper cover (2) is closed, the locking ring (12) passes through the through holes (10) on the protrusions (11) of the lower housing (1) and the upper cover (2) to achieve physical locking.
4. A forced power-off alarm device for automobile maintenance to prevent accidental activation according to any one of claims 1-3, characterized in that: Install a handle on the top of the upper cover (2).