CN203766705U - Automobile number plate anti-lost device - Google Patents

Abstract

The utility model relates to an automobile number plate anti-lost device, in particular to an anti-lost device of an automobile number plate. The automobile number plate anti-lost device achieves the effect that alarm signals can be sent before an automobile number plate is thoroughly separated from an automobile body, and the automobile number plate is prevented from being lost. According to the technical scheme, the automobile number plate anti-lost device comprises a position switch KM1, a relay KJ1, an alarm device and a power supply, the relay KJ1 and the position switch KM1 are electrically connected with the alarm device, and the power supply supplies electricity to the whole anti-lost device. The automobile number plate anti-lost device is suitable for automobiles, used for field work frequently, of electric power departments.

Description

Anti-lost device for car license plate

technical field

The utility model relates to an anti-lost device, in particular to an anti-lost device for automobile license plates.

Background technique

In the power system, the staff often drive to the field to repair and debug the power equipment or lines. Usually, after day after day of wind and rain, the screws fixing the license plate on the car will gradually loosen, and finally the car license plate It will be lost without the staff noticing, or the car license plate will be stolen by some criminals without the staff's knowledge, which will bring unnecessary losses and troubles to the unit and employees.

Contents of the invention

The utility model overcomes the deficiencies in the prior art, and the technical problem to be solved is: to provide an automobile license plate anti-lost device which can send an alarm signal before the automobile license plate completely leaves the vehicle body to prevent the loss of the automobile license plate.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: a car license plate anti-lost device, including a position switch KM1, a relay KJ1, an alarm device and a power supply arranged in the gap between the car shell and the license plate, the relay KJ1 is electrically connected with the position switch KM1 and the alarm device, and the power supply supplies power for the entire anti-lost device.

When working, the position switch KM1 monitors the position of the license plate on the car in real time. When the license plate is about to fall off the car or is stolen by criminals, the position switch KM1 will receive an "abnormal" signal, and the position switch KM1 will "abnormal" The "signal is converted into a switch signal and transmitted to the relay KJ1, and the relay KJ1 controls the alarm device to send an alarm signal, prompting the staff: the car license plate is abnormal, so that the staff can take measures in time to prevent the loss of the car license plate. The specific connection structure of the license plate anti-lost device can be used by those skilled in the art in various ways, and the following structure can be adopted: one end of the normally open contact KM1.1 of the position switch KM1 is connected to one end of the normally open contact KJ1.2 of the relay KJ1 After that, it is connected to the positive pole of the power supply, the other end of the normally open contact KM1.1 of the position switch KM1 is connected to one end of the coil KJ1.1 of the relay KJ1, and the other end of the normally open contact KJ1.2 of the relay KJ1 is connected to the alarm device. The power input terminal is connected, and the power output terminal of the alarm device is connected with the negative pole of the power supply after being connected with the other end of the coil KJ1.1 of the relay KJ1.

Preferably, the alarm device includes an indicator light HD1 and an alarm DL1, the power input end of the indicator light HD1 and the power input end of the alarm DL1 are both power input ends of the alarm device, and the power output of the indicator light HD1 Terminal and the power output terminal of the alarm DL1 are the power output terminals of the alarm device. While realizing the sound alarm, realize the light alarm, and know the abnormal situation of the license plate in time.

Preferably, the position switch KM1 is a travel switch, the travel switch includes an operating head and a contact system, and the operating head is in contact with the contact system through a driving rod; the travel switch is arranged between the shell of the car and the license plate In the gap between, under normal conditions, the car license plate is in close contact with the operating head of the travel switch, and the driving rod is pushed to the contact system so that the normally open contact KM1.1 in the contact system is in an open state; the relay KJ1 is in the middle relay. The specific connection structure is that one end of the normally open contact KM1.1 of the travel switch is connected in parallel with one end of the normally open contact KJ1.2 of the relay KJ1 and then connected with the positive pole of the power supply, and the other end of the normally open contact KM1.1 of the travel switch One end is connected to one end of the coil KJ1.1 of the relay KJ1, the other end of the normally open contact KJ1.2 of the relay KJ1 is connected to the power input end of the indicator light HD1 and then connected to the power input end of the alarm DL1, and the indicator light HD1 The output end of the power supply is connected in parallel with the output end of the power supply of the alarm DL1 and the other end of the coil KJ1.1 of the relay KJ1, and then connected with the negative pole of the power supply.

When working, the limit switch is installed in the gap between the car shell and the license plate. Under normal conditions, the car license plate is in close contact with the operating head of the limit switch, and the driving rod is pushed to the contact system so that the normally open contact in the contact system Point KM1.1 is in the open state. When the screw for fixing the license plate is loose, or when a lawbreaker twists the screw, the pressure between the license plate and the operating head of the travel switch will decrease due to the loosening of the license plate, and the driving rod of the travel switch will gradually Moving from the contact system of the limit switch to the operating head, when the driving rod is far away from the contact system to a certain extent, the normally open contact KM1.1 in the contact system changes from an open state to a closed state, and the coil KJ1 of the relay KJ1. 1 is energized, the normally open contact KJ1.2 of the relay KJ1 is closed, the alarm device is energized, the indicator light HD1 emits a warning light, and the alarm DL1 emits a warning sound to remind the staff that there is an abnormal situation on the car license plate, so that the staff can timely Stop artificial or non-artificial loss of license plate.

The utility model has reasonable design, can effectively detect the state of the license plate of the vehicle, realize timely alarm, and avoid accidental loss of the license plate.

Description of drawings

Fig. 1 is the circuit structure schematic diagram of the present utility model;

Fig. 2 is the installation schematic diagram of position switch KM1 in the utility model;

In the figure: 1-operating head, 2-contact system, 3-driving rod, 4-car shell, 5-license plate.

Detailed ways

Specific embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a kind of automobile license plate anti-lost device comprises position switch KM1, relay KJ1, alarm device and power supply that are arranged on the gap between automobile shell 4 and license plate 5, and described relay KJ1 is all connected with position switch KM1 and The alarm device is electrically connected, and the power supply supplies power to the entire anti-lost device; one end of the normally open contact KM1.1 of the position switch KM1 is connected to one end of the normally open contact KJ1.2 of the relay KJ1 and then connected to the positive pole of the power supply , the other end of the normally open contact KM1.1 of the position switch KM1 is connected to one end of the coil KJ1.1 of the relay KJ1, and the other end of the normally open contact KJ1.2 of the relay KJ1 is connected to the power input end of the alarm device, and the alarm The power output terminal of the device is connected to the other end of the coil KJ1.1 of the relay KJ1 in parallel and then connected to the negative pole of the power supply.

Specifically, the relay KJ1 can be an intermediate relay, and the alarm device can include an indicator light HD1 and an alarm DL1, and the power input end of the indicator light HD1 and the power input end of the alarm DL1 are both power input terminals of the alarm device. end, the power output end of the indicator light HD1 and the power output end of the alarm DL1 are the power output ends of the alarm device, that is, the other end of the normally open contact KJ1.2 of the relay KJ1 is connected to the power input of the indicator light HD1 The terminal is connected to the power input terminal of the alarm DL1, the power output terminal of the indicator light HD1 is connected to the power output terminal of the alarm DL1, and the other end of the coil KJ1.1 of the relay KJ1 is connected to the negative pole of the power supply.

The position switch KM1 can be a travel switch, as shown in Figure 2, the travel switch includes an operating head 1 and a contact system 2, the operating head 1 is in contact with the contact system 2 through a drive rod 3, the stroke The switch is set in the gap between the car shell 4 and the license plate 5. Under normal conditions, the car license plate 5 is in close contact with the operating head 1 of the travel switch, and the driving rod 3 is pushed to the contact system 2 so that the normally open contact system 2 Contact KM1.1 is open.

The position switch KM1 in the utility model can feel the slight displacement change of the license plate 5, and can transmit the alarm signal rapidly, effectively warns the staff, has prevented the loss of the license plate; Describe in detail, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made without departing from the gist of the utility model within the scope of knowledge of those skilled in the art.

Claims (6)

1. an automotive license plate anti-losing device, it is characterized in that: comprise and be arranged on position switch KM1, relay K J1, warning device and the power supply in space between automobile case (4) and car plate (5), described relay K J1 is all electrically connected to position switch KM1 and warning device, and described power supply is whole anti-losing device power supply.

2. a kind of automotive license plate anti-losing device according to claim 1, it is characterized in that: one end of the open contact KM1.1 of described position switch KM1 and succeed one end of open contact KJ1.2 of electrical equipment KJ1 after be connected with the positive pole of power supply, the other end of the open contact KM1.1 of position switch KM1 is connected with one end of the coil KJ1.1 of relay K J1, the other end of open contact KJ1.2 and the power input of warning device of relay K J1 are connected, the power output end of warning device and succeed the other end of coil KJ1.1 of electrical equipment KJ1 after be connected with the negative pole of power supply.

3. a kind of automotive license plate anti-losing device according to claim 2, it is characterized in that: described warning device comprises indicator lamp HD1 and annunciator DL1, the power input of the power input of described indicator lamp HD1 and annunciator DL1 is the power input of warning device, and the power output end of the power output end of described indicator lamp HD1 and annunciator DL1 is the power output end of warning device.

4. according to arbitrary described automotive license plate anti-losing device in claims 1 to 3, it is characterized in that: described position switch KM1 is travel switch.

5. a kind of automotive license plate anti-losing device according to claim 4, is characterized in that: described travel switch comprises operating head (1) and contact system (2), and described operating head (1) contacts with contact system (2) by drive spindle (3);

Under normality, operating head (1) close contact of car plate (5) and travel switch, drive spindle (3) is pushed to contact system (2) and makes open contact KM1.1 in contact system (2) in open mode.

6. according to arbitrary described automotive license plate anti-losing device in claims 1 to 3, it is characterized in that: described relay K J1 is intermediate relay.