JP2019217119A - Radio wave leakage prevention device of smart key - Google Patents

Abstract

To provide a radio wave leakage prevention device of a smart key, the device that has high convenience and is suitable for preventing vehicle theft by relay attack.SOLUTION: A radio wave leakage prevention device 1 of a smart key 100 is provided by: having a structure for covering the whole smart key by a radio wave shield bag 3; having a cylindrical body 4 passing through an insertion port 2 of the radio wave shield bag 3; also, enabling the radio wave of the smart key 100 to be shut in the radio wave shield bag 3 or emitted to the outside, by simple one-touch operation with one hand of only opening and closing an opening 4A of one end side of the cylindrical body 4 by a lid 6; eliminating the need for taking out the smart key 100 from the radio wave shield bag 3 when actually using the smart key 100; and enabling the radio wave emitted from the smart key 100 to the outside to be concentrated on one point (opening 4A of one end side of the cylindrical body 3).SELECTED DRAWING: Figure 1

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio wave leakage prevention device for preventing radio wave leakage of a smart key used in an automobile, and is particularly convenient and suitable for preventing vehicle theft due to a relay attack.

  Known smart keys used in automobiles can lock and unlock the door lock and start the engine without touching the key, and while convenient, there is a risk of vehicle theft due to relay attack is there.

  Relay attack is a burglary technique that exploits radio wave leakage from the smart key.In consideration of this point, conventionally, relay attack countermeasures such as pouches or cases having a radio wave blocking function are commercially available. By enclosing the entire smart key in a pouch or a case, it is attempted to prevent radio wave leakage from the smart key and to avoid a relay attack (for example, see Patent Document 1 as a general technique for preventing radio wave leakage) ).

  However, in the above-mentioned conventional products such as conventional pouches and cases such as pouches and cases, because of its structure, the radio wave blocking function restricts the emission of smart keys from the inside of the pouch or the case to the outside. When the owner actually uses the smart key, the smart key must be removed from the pouch or the case, which is inconvenient.

  In addition, according to conventional anti-relay products such as porches and cases, the moment the smart key is removed from the porch or case, the effect of the porch or case from preventing relay attacks is lost, and the smart key is indiscriminately directed to the outside. This is not suitable for preventing a car from being stolen due to a relay attack.

JP-A-11-45316

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a smart key radio wave leakage prevention device which is highly convenient and is suitable for preventing vehicle theft due to a relay attack. It is.

  In order to achieve the above object, the present invention provides a device for preventing radio wave leakage of a smart key used in an automobile, comprising a radio wave shielding bag having an insertion port, a tubular body passed through the insertion port, and A cover provided on the cylindrical body; and a radio wave shielding bag including a radio wave shielding material as a constituent material thereof. It has a blocking function and a covering function for covering the entirety of the smart key, and the cylindrical body has a radio wave blocking function by including a radio wave shielding material as a constituent material thereof, and the opening at one end side of the cylindrical body is The cover is exposed to the outside of the radio wave shielding bag, and the opening at the other end of the cylindrical body is located inside the radio wave shielding bag. The cover includes a radio wave shielding material as a constituent material thereof. Shutdown function And having, characterized in that it functions as a means for opening and closing the opening of the cylindrical body one end.

  In the present invention, since the radio wave shielding bag is formed of a transparent or translucent material, the operation unit of the smart key covered with the radio wave shielding bag is visible from above the radio wave shielding bag. It may be a feature.

  In the present invention, the radio shield bag is formed of an opaque material, and at a position corresponding to an operation unit of the smart key covered with the radio shield bag, of the entire surface of the radio shield bag. A mark indicating the presence of the operation unit may be displayed.

  In the present invention, the close-contact means may be formed of rubber or another elastic member that presses an edge of the insertion port toward an outer peripheral surface of the cylindrical body with an elastic force.

  In the present invention, the close-contact means may be formed of an adhesive, a double-sided tape, or another bonding member for bonding the edge of the insertion port to the outer peripheral surface of the cylindrical body.

  According to the present invention, the above configuration is employed as a specific configuration of the smart key radio wave leakage prevention device. For this reason, the radio wave of the smart key can be confined in the radio wave shielding bag or released outside with a simple one-handed operation with one hand, simply opening and closing the opening on one end side of the cylinder with the lid, In order to actually use the smart key, it is not necessary to remove the smart key from the radio wave shielding bag, and one point of radio wave emitted from the smart key (specifically, one end of the cylinder Since it concentrates on the (opening), it is possible to provide a smart key radio wave leakage prevention device which is highly convenient and is suitable for preventing vehicle theft due to a relay attack.

FIG. 2 is a schematic cross-sectional view of the radio wave leakage prevention tool to which the present invention is applied, as viewed from above. (A), (b) is operation | movement explanatory drawing of the radio wave leakage prevention tool of FIG. FIG. 2 is a top external view of the radio wave leakage prevention device of FIG. 1 (without a cover). FIG. 2 is a flowchart of an alarm process for opening / closing a lid constituting the radio wave leakage prevention tool of FIG. 1. Explanatory drawing (corresponding to FIG. 3) of another embodiment of the present invention.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic cross-sectional view of a radio wave leakage prevention tool to which the present invention is applied, as viewed from above, FIGS. 2A and 2B are explanatory diagrams of the operation of the radio wave leakage prevention tool of FIG. 1, and FIG. It is an upper surface external view (without a cover) of a prevention tool.

  Referring to FIG. 1, a radio wave leakage prevention tool 1 shown in FIG. 1 is a radio wave leakage prevention tool for a smart key 100 used in an automobile, and as specific components thereof, a radio wave shielding bag 3 having an insertion slot 2 and A cylindrical body 4 passed through the insertion opening 2, a contacting means 5 for bringing the edge 2A of the insertion opening 2 into close contact with the outer peripheral surface of the cylindrical body 4, a lid 6 provided on the cylindrical body 4, and a radio wave shielding bag. And a cover 7 that accommodates the smart key 100 covered with 3.

<< Detailed configuration of radio shield bag 3 (Part 1) >>
The radio wave shielding bag 3 has a radio wave blocking function by including a radio wave shielding material as a constituent material thereof, and a covering function of covering the entire smart key 100. Since the radio wave shielding material itself is well known, a detailed description thereof will be omitted. For example, when the radio wave shielding bag 3 is configured as a transparent or translucent bag, the radio wave shielding bag 3 may be formed using a known transparent radio wave shielding film.

  As a specific example of the radio wave shielding bag 3, in the radio wave leakage prevention tool 1 of FIG. 1, the radio wave shielding bag 3 is formed of a transparent or translucent material as shown in FIG. The operation unit 101 of the smart key 100 covered with the bag 3 is configured to be visible through the radio wave shielding bag 3 from above.

  The radio wave shielding bag 3 and the smart key 100 covered by the radio wave shielding bag 3 may be in close contact with each other. As a method of the close contact, for example, a method of bleeding air from the radio wave shielding bag 3 (evacuating the radio wave shielding bag 3) can be considered, but is not limited to this.

  When the insertion slot 2 has a shape in which the mouth of the shopping bag is squeezed, for example, the smart key 100 is inserted from a wide mouth before squeezing, and the entire smart key 100 is set so as to be covered by the radio wave shielding bag 3. You may. Alternatively, the smart key 100 may be set so that the entire smart key 100 is covered by the radio shield bag 3 by inserting the smart key 100 into the radio shield bag 3 from a place other than the insertion slot 2.

<< Detailed configuration of cylinder 4 >>
The cylindrical body 4 has a radio wave shielding function by including a radio wave shielding material as a constituent material thereof, and an opening 4A at one end side of the cylindrical body 4 is exposed outside the radio wave shielding bag 3, and the other end side of the cylindrical body 4 is provided. Opening 4B is located inside the radio wave shielding bag 3.

  Such a radio wave blocking function of the cylindrical body 4 can be realized by forming the cylindrical body 4 itself with a radio wave shielding material, and a radio wave blocking function with respect to the outer peripheral surface of a cylindrical body (for example, a straw) having no radio wave blocking function. May be realized by attaching a film having

  The cross-sectional shape of the cylindrical body 4 can be appropriately changed as needed, such as a circle, an ellipse, or a polygon. Further, the overall length of the cylindrical body 4, the length and direction in which the opening 4 </ b> A on one end side of the cylindrical body 4 is exposed to the outside of the radio wave shielding bag 3, and the position of the opening 4 </ b> B on the other end side of the cylindrical body 4 inside the radio shielding bag 3. Can also be changed as needed.

<< Details of adhesion means 5 >>
As an example (part 1) of the contacting means 5, in the radio wave leakage preventing tool 1 of FIG. 1, the entire edge 2A of the insertion port 2 is formed in a cylindrical shape, and the formed cylindrical portion (hereinafter referred to as “cylindrical portion (edge) 2A), the edge 2A of the insertion opening 2 is pressed by the elastic force of the rubber 51 toward the outer peripheral surface of the cylindrical body 4, and the edge 2A of the insertion opening 2 is pressed. Although the method in which the outer peripheral surface of the cylindrical body 4 is in close contact with the outer peripheral surface of the cylindrical body 4 is adopted, the present invention is not limited to this.

  As an embodiment (part 2) of the contacting means 5, although not shown, a rubber balloon smaller than the entire size of the radio shield bag 3 covered with the smart key 100 is prepared, and the rubber balloon is inserted through the mouth of the prepared rubber balloon. In this state, the electromagnetic shield bag 3 covered with the smart key 100 is put, and in this state, the mouth portion of the rubber balloon is attached to the cylindrical portion (edge portion 2A) in the same manner as the ring-shaped rubber 51 described above. Is also good.

  In the embodiment (part 2) of the close contact means 5, the edge 2A of the insertion port 2 is pressed toward the outer peripheral surface of the cylindrical body 4 by the elastic force of the mouth of the rubber balloon, and the edge 2A of the insertion port 2 is pressed. And the outer peripheral surface of the cylinder 4 are in close contact with each other. At the same time, the radio wave shielding bag 3 and the smart key 100 can be in close contact with each other by the elastic force other than the mouth of the rubber balloon.

  Although not shown in the drawings as an example (part 3) of the contacting means 5, the contacting means 5 is an adhesive for bonding the edge 2A of the insertion opening 2 to the outer peripheral surface of the cylindrical body 4, a double-sided tape or other adhesive member. May be configured.

<< Detailed configuration of lid 6 >>
The lid 6 has a radio wave blocking function by including a radio wave shielding material as a constituent material thereof, and also functions as a means for opening and closing the opening 4A on one end side of the cylinder 4. Since the cover 6 has a radio wave blocking function, when the opening 4A on one end side of the cylindrical body 4 is closed by the cover 6, radio wave leakage from the smart key 100 through the opening 4 hardly occurs.

  Referring to FIGS. 2A and 2B, as the opening / closing structure (part 1) of the lid 6, in the radio wave leakage prevention tool 1 of FIG. 1, the lid 6 is connected to one end of the cylindrical body 4 via the resin hinge 61. And an opening 4A on one end side of the cylindrical body 4 is opened and closed by a rotation operation with the resin hinge 61 as a base point.

  As an opening / closing structure (part 2) of the lid 6, although not shown, the lid 6 is provided so as to be slidable along the axial direction of the cylinder 4 near the opening 4A on one end side of the cylinder 4. The opening 4A on one end side of the cylindrical body 4 may be opened and closed by sliding in the axial direction.

  Although not shown, the lid 6 is provided so as to be slidable in the radial direction of the cylindrical body 4 near the opening 4A on one end side of the cylindrical body 4, and is not shown in the drawing as the opening / closing structure of the lid 6 (part 3). The opening 4A on one end side of the cylinder 4 may be opened and closed by sliding.

  Although not shown, the lid 6 may be removably attached to the opening 4A on one end side of the cylinder 4 via a magnet, as an opening / closing structure (part 4) of the lid 6. This magnet type opening / closing structure (No. 3) may be used in combination with the aforementioned opening / closing structures (No. 1) to (No. 3).

  The above-described lid opening / closing structures (Part 1) to (Part 4) all allow the lid 6 to be opened and closed by one-touch operation with one hand. Further, the opening / closing structure of the lid 6 is not limited to the above-described opening / closing structure of the lid 6 (part 1) to (part 4), and another opening / closing structure other than those is used as the opening / closing structure of the lid 6. May be adopted.

<< Cover 7 >>
The cover 7 functions as protection means for preventing the radio wave shielding bag 3 from being damaged. In order to effectively realize such a function, the cover 7 may be formed in a bag shape using, for example, leather or synthetic leather. The cover 7 is provided with a window 7A for making the operation unit 101 of the smart key 100 visible.

<< Detailed configuration of radio wave shielding bag 3 (Part 2) >>
As shown in FIG. 5, the radio wave shielding bag 3 may be formed of an opaque material. In this case, the entire operation unit 101 of the smart key 100 is hidden by the radio wave shielding bag 3. The mark 300 indicating the presence of the operation unit 101 is displayed at the corresponding position.

<< Alarm regarding opening / closing of lid 6 >>
In order to start the engine of the vehicle, it is necessary for the vehicle to receive a radio wave from the smart key 100 at the time of starting. For this reason, if the lid 4 closes the opening 4A at one end of the cylinder 4 before the engine starts, the smart key 100 cannot transmit radio waves to the outside and cannot start the engine. On the other hand, it is not preferable from the standpoint of crime prevention that the opening 4A at one end of the cylindrical body 4 is kept open after the engine is started. As a means for solving these problems, the radio wave leakage prevention tool 1 of FIG. 1 may be configured and mounted as one integrated chip with electronic devices for executing the alarm process of the flowchart shown in FIG. .

  The timing of starting the processing of the flowchart shown in FIG. 4 may be, for example, the time when the smart key holder comes closest to the target vehicle.

  Referring to the flowchart shown in FIG. 4, immediately after starting the processing, it is determined whether or not the engine is started. In this determination process, for example, when an engine start signal is transmitted from the automobile and the radio wave leakage prevention device 1 receives the signal, it may be determined that the engine is started (ST100).

  If it is determined in ST100 that the engine has been started, then it is determined whether, for example, 10 seconds or a predetermined time has elapsed since the start of the engine. In this determination process, a countdown timer for a predetermined time may be started with the engine start as a trigger, such as reception of the above-described engine start signal, and if the countdown timer has reached zero, it may be determined that the predetermined time has elapsed. The predetermined time can be appropriately changed as needed (YES in ST100, ST101).

  If it is determined in ST101 that the predetermined time has elapsed, it is further determined whether or not the lid 6 is open. In this determination process, for example, even if the opening / closing of the lid 6 is detected by a sensor, and if an open signal is output from the sensor, the lid 6 is determined to be open, and otherwise it is determined to be closed. Good (YES in ST101, ST102).

  If it is determined in step ST102 that the cover 6 is open, it is not preferable for the security to open the cover 6 as it is. Therefore, synthesis such as "Close the cover. To prevent radio wave leakage". A lid closing instruction alarm is output by voice, buzzer sound, etc. (YES in ST102, ST103).

  On the other hand, if it is determined in ST300 that the lid 6 is not open (closed), the radio wave leakage of the smart key by the radio wave leakage prevention device 1 is effectively prevented, and thus the processing of this flowchart is performed. To end.

  If it is determined in ST100 that the engine has not started yet, it is next determined whether or not the lid 6 is closed (ST200). An example of this determination processing is as described above.

  In ST200, when it is determined that the lid 6 is closed, a lid opening instruction alarm is output by a synthesized voice or a buzzer sound such as "Open the lid. The engine cannot be started as it is". If the lid 6 is closed, the radio wave from the smart key 100 cannot be received by the vehicle, and the engine cannot be started even if the engine start button of the vehicle is pressed (ST200: YES, ST201). .

  On the other hand, if it is determined in ST200 that the lid 6 is not closed (open), the engine waits for the engine to start (NO in ST200, ST100). In this case, the electric wave from the smart key 100 can be received by the automobile, and the engine can be started based on the electric wave.

<< Operation and effect of radio wave leakage prevention tool 1 >>
The radio wave leakage prevention tool 1 is a simple one-handed one-touch operation of opening and closing the opening 4A at one end of the cylindrical body by the lid 6, and confining the electric wave of the smart key 100 in the electric wave shielding bag 3 or externally. And can be released.

  That is, when the opening 4A on one end side of the cylindrical body is open, the radio wave of the smart key 100 is emitted only from the opening 4A to the outside. At this time, radio waves are not emitted from the outer peripheral surface of the cylinder 4 or the outer peripheral surface of the smart key 100 to the outside. This is because the outer peripheral surface of the smart key 100 is covered with a radio wave shielding bag 3 having a radio wave blocking function, and the cylinder 4 also has a radio wave blocking function.

  On the other hand, when the opening 4A at one end of the cylindrical body is closed by the lid 6, emission of radio waves from the opening 4A is also prohibited. This is because the lid 6 also has a radio wave blocking function similarly to the radio wave shielding bag 3 and the cylinder 4.

  In the radio wave leakage prevention tool 1 of the embodiment described above, the smart shield bag 3 is placed in the radio wave shielding bag 3 by a simple one-handed operation of simply opening and closing the opening 4A on one end side of the cylindrical body 4 with the lid 6. The radio wave of the key can be confined or emitted to the outside, and it is not necessary to take out the smart key 100 from the radio wave shielding bag 3 when actually using the smart key 100. Since radio waves emitted from outside are concentrated at one point (specifically, the opening 4A at one end side of the cylindrical body 4), it is highly convenient and is suitable for preventing vehicle theft due to a relay attack.

  The present invention is not limited to the embodiment described above, and many modifications can be made by those having ordinary knowledge in the art within the technical spirit of the present invention.

REFERENCE SIGNS LIST 1 radio wave leakage prevention tool 2 insertion opening 2A insertion opening edge 3 radio wave shielding bag 4 cylinder 4A opening at one end of cylinder 4B opening at other end of cylinder 5 adhesion means 6 lid 61 resin hinge 7 cover 7A window 100 Smart key 101 Operation unit

Claims (5)

An electric wave leakage prevention device for a smart key used in an automobile,
A radio wave shielding bag having an insertion port,
A cylinder passed through the insertion port,
Close contact means for bringing the edge of the insertion port into close contact with the outer peripheral surface of the cylindrical body,
A lid provided on the cylindrical body,
The radio wave shielding bag has a radio wave blocking function by including a radio wave shielding material as a constituent material thereof, and a covering function of covering the entire smart key.
The cylindrical body has a radio wave blocking function by including a radio wave shielding material as a constituent material thereof, an opening at one end of the cylindrical body is exposed to the outside of the radio wave shielding bag, and an opening at the other end side of the cylindrical body is closed. It is in a state located inside the radio wave shielding bag,
The radio wave leakage prevention device for a smart key, wherein the lid has a radio wave blocking function by including a radio wave shielding material as a constituent material thereof, and also functions as a means for opening and closing an opening on one end side of the cylindrical body. The radio wave shielding bag is formed of a transparent or translucent material, so that the operation unit of the smart key covered with the radio wave shielding bag can be viewed from above the radio wave shielding bag. 2. The radio wave leakage prevention device of the smart key according to 1. The radio wave shielding bag is formed of an opaque material, and the presence of the operation unit at a position corresponding to the operation unit of the smart key covered with the radio wave shielding bag on the entire surface of the radio wave shielding bag. The radio key leakage preventing device according to claim 1, wherein a mark indicating is displayed. 2. The smart key radio wave according to claim 1, wherein the contact unit is made of rubber or another elastic member that presses an edge of the insertion port toward an outer peripheral surface of the cylindrical body with an elastic force. 3. Leak prevention tools. The radio wave of the smart key according to claim 1, wherein the contact unit is formed of an adhesive, a double-sided tape, or another adhesive member that adheres an edge portion of the insertion port to an outer peripheral surface of the cylindrical body. Leak prevention tools.

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