JP2983210B1 - Anti-theft devices for computers and computer equipment - Google Patents

Abstract

An anti-theft device for a computer and a computer-applied device that can be attached regardless of the manufacturer and type of a computer and that can prevent unauthorized carrying of a computer main body or parts. A device for preventing theft of a computer component, wherein a screw contact is provided on a screw seat 24 of a screw portion of a housing cover 22 of the computer or a screw seat 29 of a screw portion of an internal component, and can be attached to the computer. The anti-theft circuit 1 is provided on the substrate, and the screw contact is conducted or interrupted by removing the screw from the screwed portion, and an alarm signal is generated by the conduction or interruption of the screw contact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer for preventing theft of components related to a computer and an antitheft device for computer-applied equipment.

[0002]

2. Description of the Related Art The performance of computers is improving day by day, and computer components are becoming more expensive as technology advances. Today, theft of computers or computer components has become a problem. The purpose of stealing computer components is to steal software stored in the hard disk or memory together with the hard disk or memory, or to steal a high-performance CPU or the like and replace it with your own computer, Or to increase the performance. Such theft frequently occurs in facilities equipped with a large number of computers, such as schools and computer classrooms, and effective countermeasures are desired.

As an anti-theft device for a device such as a computer, for example, as described in Japanese Patent Application Laid-Open No. Hei 6-266977, a device capable of performing a processing operation by obtaining power from a power supply wired in a building. A main unit, a receiving unit provided in the main unit for receiving a signal superimposed on the power supply from the building away from the installation location of the main unit, and a signal received by the receiving unit. Under such a condition, a device anti-theft device having a control means for controlling a device main body to perform a processing operation is known.

According to the invention described in the above publication, in a device requiring an external power supply, an external power supply line is used to
When the device is moved to another place, a predetermined operation cannot be performed, and theft can be effectively prevented. Therefore, there is a problem that separate wiring is required, and the entire equipment becomes large and expensive.

[0005] In addition, it is conceivable to install a security camera or to record the video of the security camera with a VTR to prevent theft. However, considering the installation work cost and running cost, the cost becomes considerably high. was there.

[0006] Therefore, there has been a demand for an anti-theft device for a computer or a component of a computer with a relatively simple configuration.

[0007]

SUMMARY OF THE INVENTION The present invention has been conceived in view of the above background, and can be mounted irrespective of the make and model of a computer. It is an object of the present invention to provide a computer and an anti-theft device for computer-applied equipment capable of preventing theft.

[0008]

According to one aspect of the present invention, there is provided an apparatus for preventing theft of a computer component, comprising a screw seat or an internal portion of a screwed portion of a computer housing cover. A screw contact is provided on a screw seat of a screwing portion of the component, and a board that can be attached to a computer is provided on the board, and the screw contact is conducted or cut off by extracting a screw from the screwing portion. An anti-theft circuit that issues an alarm signal when the screw contacts are turned on or off is provided, and the computer is turned on when the computer is on.
Computer as the power supply for the anti-theft circuit, and
When the power is off, remove the battery from the anti-theft circuit.
Source .

According to a second aspect of the present invention, there is provided a device for preventing theft of a computer component, comprising a board which can be attached to the computer, a plurality of optical sensors attached to the board, and the optical sensors are connected to each other. An anti-theft circuit arranged to detect light from different directions and provided with an alarm signal by detecting external light when at least one optical sensor detects external light when a computer housing cover is removed, is provided . When the power is on, the computer
Computer as the power supply for the anti-theft circuit,
When the power is off, connect the battery to the power
Characterized in that it.

According to a third aspect of the present invention, there is provided a computer and
An anti-theft device for the component, comprising a computer housing
Screw base of screw part of cover or screw part of internal part
Threaded contacts are provided on the base and can be attached to a computer
The substrate has a functional substrate.
The screw contact is turned on or off by extracting
And an alarm signal is generated by the conduction or interruption of the screw contact.
Anti-theft circuit and multiple optical sensors in different directions
From the computer housing
If the body cover is removed, at least one optical
Theft that emits an alarm signal when the sensor detects outside light
Protection circuit is provided and the computer is turned on.
When the computer power supply is
And stolen the battery when the computer is off
It is characterized in that it is used as a power supply for the prevention circuit .

According to a fourth aspect of the present invention, there is provided a computer and
An anti-theft device for the component, comprising a computer housing
Screw base of screw part of cover or screw part of internal part
Threaded contacts are provided on the base and can be attached to a computer
The substrate has a functional substrate.
The screw contact is turned on or off by extracting
And an alarm signal is generated by the conduction or interruption of the screw contact.
Anti-theft circuit and the computer tilts more than a certain angle
A pendulum-type tilt sensor that emits a signal is attached.
Alarm when the sensor detects the tilt of the computer.
And a theft prevention circuit that issues an alarm signal.
When the power of the computer is on, the computer is stolen
When the power of the prevention circuit is used and the computer is off
Is characterized in that a battery is used as a power supply for the anti-theft circuit .

According to a fifth aspect of the present invention, a computer and
An anti-theft device for the part,
It has a substrate that can be attached, and this substrate has a plurality of optical sensors.
Are attached, and each optical sensor is
Arranged to detect light and cover the computer housing
At least one light sensor is
An anti-theft circuit that issues an alarm signal by detecting external light
Signals when the road and the computer tilt more than a certain angle
A pendulum type tilt sensor is attached, and the tilt sensor is
Generates an alarm signal by detecting the tilt of the computer
Anti-theft circuit and turn off the computer
The computer's power supply when the
Battery when the computer is off.
It is characterized by being used as a power supply for an anti-theft circuit .

[0013] The invention according to claim 6 is the first or second invention .
Computer and computer application according to 3, 4 or 5
In a device anti-theft device, multiple computers
Real connection, provided on each computer board
If at least one of the anti-theft circuits operates, an alarm signal is issued.
It is characterized by emitting .

According to a seventh aspect of the present invention ,
Computer and computer application according to 3, 4 or 5
The operation of the anti-theft circuit is
It is characterized by setting by Ios .

[0015] The invention described in claim 8 is the same as the invention described in claim 7.
For anti-theft devices for computers and computer equipment
After entering the password, the anti-theft circuit
It does not emit a signal .

[0016]

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a computer and a computer applied equipment according to the present invention; FIG. 1 is a block diagram showing an example of a circuit configuration of the anti-theft device according to the present invention. In this embodiment, the circuit shown in FIG. 1 is added to a motherboard or an extension board attached to a computer main body in advance to prevent theft of the computer main body or components, such as a CPU, a memory, a microprocessor, and a hard disk. Things.

The anti-theft device 1 has a screw contact 4, a connection contact 5, an optical sensor 6,
A tilt sensor 7, an input interface 3 for receiving signals from these theft detecting means, a microcomputer 9 for analyzing and processing signals received by the input interface circuit on internal software, and a signal from the microcomputer 9. If it is determined that the computer is abnormal, monitor the I / O port 30 for connecting the I / O driver circuit 12 which is an input / output driver for performing a buzzer, an alarm, a display, and other operations, and theft of a plurality of computers. In this case, the serial interface circuit 10 transmits and receives data to and from an external interface. Microcomputer 9, input interface 3, serial interface 10, I / O
The port 30 is connected by a local bus.

The anti-theft device 1 is supplied with power from a power source 2 of the computer main body as shown in FIG. When the power supply 2 of the computer body is turned on, power is supplied to the power supply monitoring circuit 8 and the power supply circuit 14 through the wiring 13.

The power supply circuit 14 is a power supply circuit of the computer anti-theft circuit 1. When the power switch of the computer main body is turned on, power is supplied from the power supply 2 of the computer main body to the power supply circuit 14, and the computer anti-theft circuit 1 operates. ing.

The power supply monitoring circuit 8 is one of the theft detecting means, monitors the state of the power supply 2 of the computer main body on or off, and transmits this signal to the input interface circuit 3. The signal received by the input interface circuit 3 is
The data is analyzed and processed on the internal software, and the computer 9 can know when, when, and when the power is turned on / off. Further, the on / off signal of the power supply of the computer can be recognized by the control interface 17 via the serial interface 10.

The screw contact 4, the connection contact 5, the optical sensor 6, the tilt sensor 7, and the power supply monitoring circuit 8 as the theft detecting means are
One or a plurality of necessary sensors among these are arbitrarily selected and installed on a motherboard or an expansion board. The input interface 3 that has received a signal from the screw contact 4, the connection contact 5, the optical sensor 6, or the tilt sensor 7 transmits a signal to the microcomputer 9.

The microcomputer 9 analyzes and processes the signal received from the interface circuit 3 on the internal software, and executes the serial interface circuit 10 and the I / O
Send a signal to port 30. In addition, it receives signals from the serial interface circuit 10 and the I / O driver 12, analyzes and processes the signals on internal software, and confirms the circuit operation state.

The signal transmitted from the microcomputer 9 is transmitted to the I / O driver circuit 12 via the I / O port 30, and outputs an alarm sound, displays an alarm, and performs other operations. The serial interface circuit 10 is connected to an external serial interface when a plurality of computers are connected, and transmits and receives data when monitoring theft of the plurality of computers simultaneously.

When a plurality of computers are connected by a tree type, a star type, a daisy chain type or the like, and processing is to be performed by the microcomputer 9, the performance of the microcomputer 9 such as the processing speed and the number of processes is limited. Processing is performed by the control interface 17 via the interface circuit 10. When a board is inserted into an additional port in the computer, the power supply capacity of the computer is restricted. Therefore, the power supply 15 of the external control interface 17 may be used as the power supply of the anti-theft circuit 1.

The battery power supply 16 is connected to the power supply circuit 14. When the power supply circuit 14 is supplied with power from the power supply 2 of the computer main body or the power supply 15 of the external control interface 17, the battery power supply 16 is charged. When the power supply 2 or the power supply 15 is off, the battery power supply 16 can be used as the power supply for the anti-theft circuit 1. Therefore, the computer anti-theft circuit according to the present invention can be constantly monitored.

In the external control interface 17,
Between the microcomputer 19 and the serial interface 18 and between the microcomputer 19 and the I / O port 4
Buses are connected between 0. The serial interface circuit 18 transmits and receives signals from the serial interface circuit 10. The microcomputer 19 analyzes and processes the signal received from the serial interface circuit 18 on internal software, and the processed signal is transmitted to the driver 20 via the I / O port 40. The I / O driver 20 outputs a warning sound, displays a warning, and the like based on the signal analyzed and processed by the microcomputer 19.

Hereinafter, specific examples of various theft detecting means will be described. The screw contact 4 is formed by adding a base with an electrode to a machined portion of a computer main body, for example, a screw seat of a screwed portion of a housing cover of a computer or a screw seat of a screwed portion of an internal component.

The mounting position and shape of the screws differ depending on the manufacturer and model of the computer, but generally, as shown in FIG.
A hole is provided in a predetermined position of the housing cover 22 corresponding to the female screw, and after the screw 23 penetrates this hole, it is screwed into a female screw provided in the computer main body 21 so that the housing cover 22 is attached to the computer main body 21. It can be attached to. Therefore, by removing the screw 23, the housing cover 22 and the computer main body 21 are separated, and the components of the computer can be attached and detached.

FIGS. 3 and 4 show an example of the configuration of a screw seat into which the screw 23 is screwed. The screw seat 24 shown in FIG. 3 is of a type using a tap, and a conductor 26 and a conductor 27 are provided to face each other along the trough of the female screw portion 25 of the screw seat 24 made of an insulator. I have. Usually, the conductor 26 and the conductor 2
7 is non-conductive, but is made of a screw 23 made of a conductive material.
May be conducted by being screwed in,
Conversely, the conductive body 26 and the conductive body 27 are normally in contact with each other to conduct, but may be made non-conductive by screwing the screw 23 made of an insulator.

FIG. 4 shows a screw seat without a tap. On the upper edge of the screw seat 29, the conductor 26 and the conductor 27 are separated from each other and arranged to face each other.
Normally, the conductive body 26 and the conductive body 27 are non-conductive, but when the screw 23 made of a conductive body is screwed in, the head of the screw 23 comes into contact with the conductive body 26 and the conductive body 27 to be conductive. Alternatively, the conductors 26 and 27 may be formed as a printed pattern together with other wiring patterns formed on a circuit board, for example.

FIG. 5 shows an example in which the screw seat 24 shown in FIG. 3 is applied to a screw fixing portion of a computer main body.
Shows an example in which the screw seat 29 shown in FIG. 4 is applied to internal components of a computer. Conductor 26 and Conductor 27
Is provided on the screw seat of the screwed portion of the housing cover 22 of the computer or the screw seat of the screwed portion of the internal part, if a third party steals the computer part, the computer body cover or the internal part When an attempt is made to remove the screw, the current flowing through the screw is cut off (off) or conducted (on). Thereby, the abnormality of the computer is sensed, and this signal is transmitted to the input interface circuit 3 and transmitted from the input interface circuit 3 to the microcomputer 9.

It should be noted that the current does not flow through the entire frame or substrate, but only through the screwed portion. It may be arbitrarily selected whether the current is interrupted when the screw is tightened or the current is conducted when the screw is tightened.

A connection contact is provided between the expansion boards inside the computer to detect the interruption (OFF) or conduction (ON) of the current by connecting or disconnecting the connection cable, and transmit this signal to the input interface circuit 3. The input interface circuit 3 may transmit a control signal to the microcomputer 9, and the I / O driver 12 may receive this signal and generate an alarm signal.

An optical sensor may be provided inside the computer to detect an abnormality when the housing cover is opened. FIG. 7 shows an example in which a plurality of optical sensors are arranged on an internal substrate of a computer. Symbols 31 to 3
Reference numeral 5 denotes an optical sensor. The optical sensor 31 is an optical sensor that senses light in the rear direction, the optical sensor 32 is an optical sensor that senses light in the right side, the optical sensor 33 is an optical sensor that senses light in the front direction, The sensor 34 is an optical sensor that senses light in the left side of the side, and the optical sensor 35 is an optical sensor that senses light in the upward direction.

The five optical sensors 31 to 35 are arranged to detect light from different directions.
Since the internal configuration differs depending on the manufacturer and model of the computer, the positions of the air fan and the air intake differ, and the direction in which light enters the inside of the device when the housing cover is closed. If a single optical sensor detects light, it can detect anomalies in the computer, making it possible to perform optimal light detection that can cover light from all directions, regardless of the computer manufacturer or computer type. .

The optical sensor determines that the computer is abnormal when detecting light incident upon removal of the upper cover, keyboard, lower cover, and other mechanical parts of the computer. The data is transmitted from the input interface circuit 3 to the microcomputer 9.

When the optical sensors are mounted on the motherboard of the computer at the manufacturing stage, the optical sensors can be installed at appropriate positions, so that the number of optical sensors can be set to a necessary and sufficient number. However, when installed as an extension board and installed later, the internal configuration differs depending on the manufacturer and model of the computer.For example, the incident position and direction of external light differ depending on the position of the air fan and the position of the air intake. However, a malfunction may occur at a preset position on the expansion board. Therefore, the light detection condition setting of a plurality of optical sensors may be preset in a direction in which light does not enter. Also, the optical sensor has a certain viewing angle, but if it is uncertain only with the light sensing of one optical sensor, arbitrarily select a plurality of optical sensors,
The abnormality may be detected by sensing light in two or more directions.

Here, when trying to open the housing cover in a dark room, at night, or by covering the main body with some cover,
It is possible that the optical sensor does not respond. To solve this problem, a pendulum-type tilt sensor that emits a signal when the computer tilts by a certain angle or more may be installed inside the apparatus.

FIGS. 8 and 10 show the computer bus (P
An example is shown in which an inclination sensor is provided on an expansion board that can be attached to a CI bus, a C bus, an ISA bus, or the like. 8 and 9 show an example in which the extension board is vertically mounted on a computer. The flat conductor 42 and the flat conductor 43 having a hole 47 at the center are formed by an extension board 41.
Perpendicular to and parallel to each other at regular intervals up and down,
One end of each is attached to the expansion board 41 in a cantilever manner. A ring 44 is attached to the center of the conductor 42, and one end of a conductor 45 such as a wire is attached to the ring 44, and a weight 46 is attached to the other end. The length of the conductor 45 is the length of the conductor 42 and the conductor 43.
The conductor 45 extends through a hole 47 provided at the center of the conductor 43 and is like a pendulum.

In a normal state, that is, when the computer is placed horizontally on a desk or the like, the conductor 45 and the conductor 43 are separated and insulated from each other. In this case, when the computer is tilted by a certain angle or more, the conductor 45 contacts the conductor 43 and conducts, and the terminals 48 and 49 are turned on. Also in this case, it is determined that the computer is abnormal due to the conduction (ON) of the current, and this signal is transmitted from the input interface circuit 3 to the microcomputer 9 and analyzed and processed.
It is transmitted to the / O driver to output an alarm sound, display an alarm, and the like.

FIGS. 10 and 11 show examples in which the substrate is mounted horizontally. The L-shaped plate-shaped conductor 52 has a surface 52a and a surface 52b that make a substantially right angle,
The L-shaped flat conductive body 53 has a surface 53.
a and the surface 53b form a substantially right angle. A hole 57 is formed in the center of the surface 53b of the conductor 53. The conductors 52 and 53 are attached to the extension board 51 in a cantilever manner so that the surfaces 52b and 53b are parallel to the extension board 51. A ring 54 is attached to the center of the surface 52b of the conductor 52. One end of a conductor 55 such as a wire is attached to the ring 54, and a weight 56 is attached to the other end. The length of the conductor 55 is
Is longer than the distance between the surface 52b of the
The conductor 55 is longer than the distance between the surface 52 b of the conductor 52 and the extension board 51, and the conductor 55 penetrates a hole 57 provided at the center of the surface 53 b of the conductor 53 to form a pendulum.

In a normal state, that is, in a state where the computer is placed on a desk or the like, the conductor 55 and the conductor 53 are separated and insulated from each other. When the computer is tilted by a certain angle or more, the conductor 55 contacts the conductor 53 and conducts, and the terminals 58 and 59 are turned on. Also in this case, it is determined that the computer is abnormal due to the conduction (ON) of the current, and this signal is transmitted from the input interface circuit 3 to the microcomputer 9, analyzed and processed, and then transmitted to the I / O driver, and the alarm sound is generated. Output, alarm display, etc. are performed.

In addition, the screw contact, the optical sensor, and the inclination sensor as the anti-theft means may be provided in the computer independently of the power supply monitoring circuit. The screw contact and the optical sensor, the screw contact and the inclination sensor, and the optical sensor The computer may be effectively prevented from being stolen by using an arbitrary combination of a tilt sensor, a power supply monitoring circuit, and the like.

The anti-theft circuit 1 may be incorporated in a computer motherboard in advance, but an expansion board can be added to a bus (PCI bus, C bus, ISA bus, etc.) in the computer main body. Instead of being built into the circuit of the computer itself, it can be built into an expansion board later.

However, in a space-saving computer such as a notebook type personal computer, there is no space for an expansion board due to structural restrictions, so that a PC card must be used. Since this PC card has a thickness of about 5 mm, it is difficult to handle all of the anti-theft means with this card. Therefore, in the case of a space-saving computer such as a notebook computer, it is desirable to incorporate the computer in advance in designing the computer.

In a school, a computer classroom, or the like, a large number of computers are provided. When the computers are serially connected and at least one of the anti-theft circuits provided on the board of each computer operates, the control interface is activated. It is preferable that an alarm signal is issued on the spot through the system and an alarm signal is issued in a central control room or the like.

The anti-theft device for computers and computer-applied devices according to the present invention can be applied to devices other than computers, such as pachinko machines, printers, cash registers, and screw-fastened portions for paintings on hotels and the like. is there.

As a tilt sensor, for example, a type in which a conductor such as mercury or a ball is sealed in a container, and when the container is tilted, the mercury or the ball shifts to turn on or off an electric contact. It can also be used. Also,
A vibration sensor may be used instead of the tilt sensor.

For example, a vibration sensor as shown in FIG. 12 can be applied. This vibration sensor 61 is generally composed of semicircular conductors 62 and conductors 6 arranged on the left and right.
An insulator 64 is provided in the middle in the vertical direction, and is separated to form an outer peripheral portion 65. Conductor 62
A sphere conductor 66 and a sphere 67 are put in the outer peripheral portion 65 formed by the sphere 66 and the sphere 63.
The conductive body 62 and the conductive body 63 are electrically connected via the switch 7. When the conductor 62 and the conductor 63 conduct, the terminals 68 and 69 also conduct. When the vibration sensor 61 thus configured vibrates, the conductor 66 and the conductor 67 move in the outer peripheral portion 65 because they are spherical, and the conductor 66 and the conductor 67 come into contact or non-contact with each other. 69 leads or terminals are turned on or off.

FIG. 13 shows a horizontal arrangement of the vibration sensor shown in FIG. Also in this case, the same effects as those of the vertical vibration sensor shown in FIG. 12 can be obtained.

It is also possible to set the operation of the anti-theft circuit by BIOS. Peripheral devices are connected to the CPU, and a password (personal identification number) is assigned to the computer so that only certain people can use the computer.
It is widely used to set a computer and enable the computer by inputting this password. Therefore, when the anti-theft device according to the present invention is incorporated in a computer, after inputting a password for monitoring cancellation of the anti-theft circuit by the above-mentioned screw contact, optical sensor, tilt sensor or a combination thereof from the keyboard, The BIOS can be set so that the anti-theft circuit does not emit an alarm signal. By doing so, when replacing or repairing computer components, the operation of the anti-theft circuit can be canceled, and the operation can be performed freely without issuing an alarm signal.

As shown in FIG. 14, the anti-theft device of the present invention comprises a main microcomputer 7 of a computer main body.
1 is connected to the I / O port 30 in the anti-theft device, and the anti-theft device is connected to the I / O port of the computer main body.
The peripheral device such as a display, a keyboard, a printer, and a disk connected to the I / O port 72 may be handled in parallel with the peripheral device. Also, as shown in FIG. (RAM) 73 may be connected.

In addition, as modern computers are developed, for example, if they respond to any of the anti-theft devices using screw contacts, optical sensors, vibration sensors, or a combination thereof, the digital video is connected to the computer in advance. A camera or the like may be operated to keep a record of evidence. Also, a computer is provided with an output terminal for an alarm signal from the anti-theft device, and an alarm, an indoor monitoring camera,
Control such as an emergency call may be performed.

[0055]

According to the first aspect of the present invention, there is provided a device for preventing theft of a computer component, wherein a screw contact is provided on a screw seat of a screw portion of a computer housing cover or a screw seat of a screw portion of an internal component. Is provided, and has a board that can be attached to a computer. On the board, the screw contact is conducted or cut off by removing a screw from the screwed portion, and an alarm signal is generated by conducting or breaking the screw contact. Anti-theft circuit is provided, and the computer is turned on
If the power supply of the computer is
And steal the battery when the computer is off
Because it is used as a power supply for the difficulty prevention circuit,
Since the theft of parts can be monitored, theft of computer parts can be reliably prevented.

According to a second aspect of the present invention, there is provided a device for preventing theft of a computer component, comprising a substrate which can be mounted on the computer, and a plurality of optical sensors mounted on the substrate. Is arranged to detect light from different directions from each other , provided with an anti-theft circuit that emits an alarm signal when at least one optical sensor detects external light when the computer housing cover is removed , When the computer is on,
Computer as the power supply for the anti-theft circuit, and
When the computer is off, insert the battery into the
Because it is used as a power source, computer parts are constantly stolen
Since monitoring can be performed, theft of computer components can be reliably prevented.

According to the third aspect of the present invention, a computer
An anti-theft device for a computer and its parts, comprising a computer
The screw seat of the screw part of the housing cover or the screw of the internal parts
Screw contacts are provided on some screw seats,
It has a substrate that can be attached, and this substrate has
When the screw is pulled out, the above screw contact becomes conductive or blocked.
The alarm signal is generated by the conduction or interruption of the screw contact.
Anti-theft circuit and multiple light sensors are different from each other
A computer arranged to detect light from a direction
When the housing cover is removed, at least one
The optical sensor emits an alarm signal when detecting external light
Theft protection circuit is provided, and the computer is turned on
If the power supply of the computer is
And steal the battery when the computer is off
Because it is used as a power supply for the difficulty prevention circuit,
Since the theft of parts can be monitored, theft of computer parts can be reliably prevented.

According to the fourth aspect of the present invention, a computer
An anti-theft device for a computer and its parts, comprising a computer
The screw seat of the screw part of the housing cover or the screw of the internal parts
Screw contacts are provided on some screw seats,
It has a substrate that can be attached, and this substrate has
When the screw is pulled out, the above screw contact becomes conductive or blocked.
The alarm signal is generated by the conduction or interruption of the screw contact.
The anti-theft circuit and the computer tilt more than a certain angle
A pendulum type tilt sensor that emits a signal
The tilt sensor detects the tilt of the computer.
An anti-theft circuit that issues a more alarm signal is provided.
Turn on your computer when it is on.
Power off the anti-theft circuit and turn off the computer
In this case, the battery is used as the power supply for the anti-theft circuit.
Monitor theft of computer components at all times.
Therefore, the theft of computer components can be reliably prevented.

According to the invention described in claim 5, the computer
An anti-theft device for a computer and its parts, comprising a computer
It has a substrate that can be attached to
Sensors are mounted, each light sensor is in a different direction
From the computer housing
If the body cover is removed, at least one optical
Theft that emits an alarm signal when the sensor detects outside light
Prevention circuit and signal when computer tilts more than a certain angle
The pendulum type tilt sensor that emits
Alarm signal when the computer detects the tilt of the computer
Anti-theft circuit that emits
When the computer is on, turn off the computer
Power to the road, and back up when the computer is off.
Since the battery is used as the power supply for the anti-theft circuit,
Since the theft of computer components can be monitored, theft of computer components can be reliably prevented.

According to the invention described in claim 6, according to claim 1,
Computer and computer according to 2, 3, 4 or 5
In the anti-theft device for applied equipment, multiple computers
Are serially connected to each computer board
If at least one of the provided anti-theft circuits is activated,
By issuing a signal, it is possible to reliably prevent any one of the plurality of computers from being stolen.

According to the invention of claim 7 , claim 1,
Computer and computer according to 2, 3, 4 or 5
The operation of the anti-theft circuit in the anti-theft device of applied equipment
Is set by BIOS.
Entering a password when starting up
The activation and deactivation of the difficulty prevention circuit can be set freely.
Characterized in that that.

According to the invention of claim 8, according to claim 7,
Computer and computer equipment on board
After entering the security code on the device, the anti-theft circuit
Computer does not emit an alarm signal,
Entering a password at the time of boot-up
Road operation and non-operation can be set freely.

[0063]

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a circuit configuration of a computer and a computer applied device according to the present invention.

FIG. 2 is a perspective view illustrating an example of a screwing configuration of a computer main body.

FIG. 3 is a perspective view showing an example of a screw contact applicable to the present invention.

FIG. 4 is a perspective view showing another example of a screw contact applicable to the present invention.

5A is a perspective view illustrating an example of a screwing configuration of a computer main body, and FIG. 5B is a perspective view of the screwing portion.

FIG. 6 is a side view showing an example of a screw contact applicable to the present invention.

FIG. 7 is a plan view showing an arrangement example of an optical sensor applicable to the present invention.

FIG. 8 is a side view showing an example of a tilt sensor applicable to the present invention.

FIG. 9 is a plan view of the tilt sensor.

FIG. 10 is a side view showing another example of the tilt sensor applicable to the present invention.

FIG. 11 is a plan view of the tilt sensor of the above.

FIG. 12 is a side view showing an example of a vibration sensor applicable to the present invention.

FIG. 13 is a side view showing another example of the tilt sensor applicable to the present invention.

FIG. 14 is a circuit diagram showing an example of a connection between a theft prevention circuit applicable to the present invention and a computer.

FIG. 15 is a circuit diagram showing another example of a connection between a theft prevention circuit applicable to the present invention and a computer.

[Explanation of symbols]

 1 Anti-theft circuit 22 Housing cover 23 Screw 24 Screw seat 29 Screw seat

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G06F 1/00 370 G08B 15/00

Claims (8)

(57) [Claims] An anti-theft device for a computer component, wherein a screw contact is provided on a screw seat of a screw portion of a housing cover of the computer or a screw seat of a screw portion of an internal component, and a substrate attachable to the computer. the a, this substrate, the screw contacts by withdrawing the screw from the screw fastening portion is conductive or interrupted, provided the anti-theft circuit for issuing an alarm signal by the conduction or blocking of the screw contacts, computer power supply When the computer is on
Is used as the power supply for the anti-theft circuit, and the computer power supply is
An anti-theft device for a computer and a computer applied device, wherein a battery is used as a power source of an anti-theft circuit when off . 2. An anti-theft device for computer components, comprising a substrate which can be mounted on a computer, on which a plurality of optical sensors are mounted, each of which emits light from a different direction. The anti-theft circuit is arranged to detect, when the computer housing cover is removed, an anti-theft circuit that issues an alarm signal by detecting external light by at least one optical sensor is provided, and when the computer is turned on, Computer power
Is used as the power supply for the anti-theft circuit, and the computer power supply is
An anti-theft device for a computer and a computer applied device, wherein a battery is used as a power source of an anti-theft circuit when off . 3. An anti-theft device for computer parts.
Therefore, the screw seat or the inside of the screwed part of the computer housing cover
A screw contact is provided on the screw seat of the screwed part of the component, and it has a board that can be attached to a computer.
The screw by removing the screw from the screw stop.
Contacts are turned on or off, and the threaded contacts are turned on or off.
An anti-theft circuit that issues an alarm signal upon interruption and multiple optical sensors detect light from different directions
Is positioned so that the computer housing cover is removed
At least one light sensor detects outside light
And an anti-theft circuit that issues an alarm signal
It is, the power supply of the computer is when the turned on computer
Is used as the power supply for the anti-theft circuit, and the computer power supply is
An anti-theft device for a computer and a computer applied device, wherein a battery is used as a power source of an anti-theft circuit when off . 4. An anti-theft device for a computer and parts thereof.
And Screw seat or inside the screwed part of the computer housing cover
A screw contact is provided on the screw seat of the screwed part of the part, It has a board that can be attached to a computer, and this board
The screw by removing the screw from the screw stop.
Contacts are turned on or off, and the threaded contacts are turned on or off.
An anti-theft circuit that issues an alarm signal upon disconnection, Pendulum that emits a signal when the computer is tilted beyond a certain angle
Type tilt sensor is attached and the tilt sensor is
Theft that issues an alarm signal by detecting the inclination of the data
Prevention circuit is provided, Power on computer when computer is on
Is used as the power supply for the anti-theft circuit, and the computer power supply is
When off, use battery as power source for anti-theft circuit
Computer and computer application equipment characterized by
Anti-theft device. 5. An anti-theft device for a computer and its parts.
And It has a board that can be attached to a computer, and this board
Has multiple light sensors attached, each light sensor
Are arranged to detect light from different directions
If the computer cover is removed, at least
An alarm signal is generated when one light sensor detects external light.
An anti-theft circuit that emits Pendulum that emits a signal when the computer is tilted beyond a certain angle
Type tilt sensor is attached and the tilt sensor is
Theft that issues an alarm signal by detecting the inclination of the data
Prevention circuit is provided, Power on computer when computer is on
Is used as the power supply for the anti-theft circuit, and the computer power supply is
When off, use battery as power source for anti-theft circuit
Computer and computer application equipment characterized by
Anti-theft device. 6. A plurality of computers are serially connected.
And theft protection provided on each computer board
If at least one stop circuit operates, an alarm signal is issued.
A computer according to claim 1, 2, 3, 4 or 5.
Data and anti-theft devices for computer equipment. 7. The operation of the anti-theft circuit is controlled by BIOS.
Setting Claims 1, 2, 3, 4 or
5. Theft of computers and computer-applied devices described in 5.
Prevention device. 8. An anti-theft circuit after inputting a personal identification number.
Does not emit an alarm signal.
Anti-theft equipment for computers and computer equipment
Place.