JP7013197B2 - Cylinder unit for lock - Google Patents

Description

The present invention relates to a lock cylinder unit used for locking and unlocking a door.

Conventionally, a configuration has been proposed in which a data reading device for electrically controlling the locking / unlocking is provided in a lock cylinder unit used for locking / unlocking a door (see, for example, Patent Document 1).
Specifically, the data reading device described in Patent Document 1 is provided in a metal cylinder cover (exterior portion) and has an antenna for reading data (authentication information) stored in a non-contact type IC card. Have.

JP-A-2015-190297

In the lock cylinder unit described in Patent Document 1, a data reading device is provided in a metal cylinder cover. Therefore, when the antenna constituting the data reading device is energized, an eddy current is generated in the cylinder cover so as to block the magnetic field generated by the energization. Then, the radio wave output from the antenna to the IC card by the energization is affected by the eddy current generated in the cylinder cover, and becomes very small. That is, there is a problem that the data reading performance is deteriorated.

The present invention has been made in view of the above, and an object of the present invention is to provide a lock cylinder unit capable of improving data reading performance.

In order to solve the above-mentioned problems and achieve the object, the lock cylinder unit according to the present invention is provided with a cylinder lock into which a mechanical key is inserted and which accepts a locking / unlocking operation by a user, and a cylinder lock outside the cylinder lock. At the same time, it is wound around a predetermined axis, and a loop antenna for reading the data of the IC tag in a non-contact manner by wireless communication using an electromagnetic induction action with the IC tag and a direction along the axis. As seen, the conductor provided around the loop antenna, the cylinder lock, the loop antenna, and a metal cylinder cover having a tubular shape into which the conductor is inserted, and the conductor is the shaft . It is characterized in that the range occupied in the circumferential direction surrounding the loop antenna when viewed from the direction along the above is a part of the entire circumference in the circumferential direction.

Further, in the lock cylinder unit according to the present invention, in the above invention, at least a part of the loop antenna is arranged on the IC tag side with respect to the conductor.

Further, the lock cylinder unit according to the present invention is characterized in that, in the above invention, the loop antenna and the conductor are each patterned on a circuit board.

Further, the lock cylinder unit according to the present invention is characterized in that, in the above invention, the conductor has a shape protruding from the loop antenna side toward the IC tag side.

In the lock cylinder unit according to the present invention, a conductor is provided around the loop antenna when the loop antenna is viewed in a plane. Therefore, when the loop antenna is energized, an eddy current is generated in the conductor so as to block the magnetic field generated by the energization. Here, in the conductor, the range occupied in the circumferential direction surrounding the loop antenna when the loop antenna is viewed in a plane is a part of the entire circumference in the circumferential direction. That is, since the eddy current generated in the conductor does not flow in the entire circumference in the circumferential direction, the magnetic field generated in the loop antenna is not weakened. Further, since the conductor is provided around the loop antenna when the loop antenna is viewed in a plane, the magnetic flux generated by the loop antenna bypasses the conductor due to the eddy current generated in the conductor, and the conductor of the conductor It goes around the space separated by the minute. As a result, even when the loop antenna is covered with the cylinder cover, the magnetic flux generated by the loop antenna draws a relatively large loop. Therefore, according to the lock cylinder unit according to the present invention, the radio wave output from the loop antenna to the communication target such as an IC card can be made relatively large, and the data reading performance can be improved. It works.

FIG. 1 is a view of a door to which a lock cylinder unit according to the first embodiment is attached as viewed from the door end side. FIG. 2 is a perspective view of the lock cylinder unit as viewed from the outdoor side. FIG. 3 is a cross-sectional view of the data reading device. FIG. 4 is a view of the data reading device as viewed from the outdoor side. FIG. 5 is a diagram illustrating the effect of the first embodiment. FIG. 6 is a diagram illustrating the effect of the first embodiment. FIG. 7 is a cross-sectional view of the data reading device according to the second embodiment. FIG. 8 is a view of the data reading device according to the second embodiment as viewed from the outdoor side.

Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Further, in the description of the drawings, the same parts are designated by the same reference numerals.

(Embodiment 1)
[Structure on the door end side of the door]
First, before explaining the configuration of the lock cylinder unit 1, the structure on the door end side of the door 100 to which the lock cylinder unit 1 is attached will be described.
FIG. 1 is a view of the door 100 to which the lock cylinder unit 1 according to the first embodiment is attached, as viewed from the door end side.
The door 100 is openably and closably supported in a frame (not shown) provided along the edge of the opening of the building. As shown in FIG. 1, a lock case 200 is provided on the door end side of the door 100 so as to be exposed from the door end side end surface 101 of the door 100.

Inside the lock case 200, a dead bolt 201 (FIG. 1), an electric actuator (not shown), a power transmission mechanism (not shown), and a drive control circuit (not shown) are provided.
The dead bolt 201 is provided so as to be retractable inside and outside the lock case 200. In other words, the dead bolt 201 is provided so as to be retractable from the end surface 101 on the door end side. Then, the dead bolt 201 protrudes from the door end side end surface 101 and is engaged with a lock receiver (not shown) provided in the door end side vertical frame (not shown) constituting the above-mentioned frame body (not shown). It fits. As a result, the door 100 is locked. On the other hand, the dead bolt 201 is immersed in the end surface 101 on the door end side so that it does not engage with the lock holder described above. As a result, the door 100 is unlocked.

The electric actuator described above is composed of, for example, an electric motor, a solenoid, or the like. This electric actuator functions as an electric drive source for retracting the dead bolt 201 from the end surface 101 on the door end side.
The above-mentioned power transmission mechanism transmits the power of the above-mentioned electric actuator and the power corresponding to the locking / unlocking operation received by the lock cylinder unit 1 to the dead bolt 201, and the dead bolt 201 is transmitted from the door end side end surface 101. Make it sunk.
The above-mentioned drive control circuit performs wireless communication with an external control device (not shown), and controls the drive of the above-mentioned electric actuator under the control of the control device.

[Structure of lock cylinder unit]
Next, the configuration of the lock cylinder unit 1 will be described.
FIG. 2 is a perspective view of the lock cylinder unit 1 as viewed from the outdoor side.
As shown in FIG. 1, the lock cylinder unit 1 is attached so as to project from the outdoor surface 102 of the door 100. As shown in FIG. 1 or 2, the lock cylinder unit 1 includes a cylinder lock 2 (FIG. 2), a cylinder cover 3, and a data reading device 4 (FIG. 2).

The cylinder lock 2 has a substantially cylindrical shape as a whole, and is arranged in a posture in which the central axis of the cylinder is orthogonal to the outdoor surface 102. The cylinder lock 2 has a configuration in which a plug 22 is rotatably inserted into a cylindrical outer cylinder 21, and a mechanical key (not shown) is inserted into a keyhole 221 provided in the plug 22. It has a known configuration that accepts a locking / unlocking operation (an operation of turning the mechanical key) by a user. Although not shown concretely, the plug 22 is mechanically connected to the power transmission mechanism described above. That is, power is transmitted from the power transmission mechanism to the dead bolt 201 in response to the locking / unlocking operation by the user, and the dead bolt 201 is recessed from the above-mentioned vertical frame on the door end side.

The cylinder cover 3 is made of a metal material such as SUS, and is made of a truncated cone-shaped cylinder whose diameter is reduced as it is separated from the outdoor surface 102. Then, the cylinder lock 2 and the data reading device 4 are inserted into the cylinder cover 3. The resin material Re (FIG. 2) is filled between the inner surface of the cylinder cover 3 and the outer surface of the cylinder lock 2. That is, the data reading device 4 is enclosed in the resin material Re in the cylinder cover 3.

The data reading device 4 wirelessly communicates with an RFID tag (not shown) mounted on an IC card (not shown) held over the lock cylinder unit 1 and obtains identification information unique to the RFID tag. read. Further, the data reading device 4 performs wireless communication with an external control device (not shown) and transmits the read identification information to the control device. Here, the control device determines whether or not the identification information received from the data reading device 4 is the same as the previously recorded identification information. Then, when the control device determines that they are the same, the control device transmits a control command to the drive control circuit described above by wireless communication to control the drive of the electric actuator described above. That is, the door 100 is locked or unlocked only when the identification information read by the data reading device 4 and the identification information recorded in advance are the same.

[Configuration of data reader]
Next, the configuration of the data reading device 4 will be described.
FIG. 3 is a cross-sectional view of the data reading device 4 (cross-sectional view cut along a plane along the central axis of the cylinder cover 3). FIG. 4 is a view of the data reading device 4 as viewed from the outdoor side.
As shown in FIG. 3 or 4, the data reading device 4 includes a circuit board 41, a loop antenna 42, and a conductor 43.

The circuit board 41 is a flat plate made of an insulating material such as polyimide and extending in a substantially arc shape along a gap between the outer surface of the cylinder lock 2 and the inner surface of the cylinder cover 3, and has front and back surfaces 411 and 412. It is arranged in a posture substantially parallel to the outdoor surface 102. In the first embodiment, the circuit board 41 is composed of a multilayer board (in the first embodiment, the first to third layers 41a to 41c are three layers in order from the outdoor side) (described in FIG. 3). For the sake of convenience, a gap is provided between the first to third layers 41a to 41c). The circuit board 41 may be composed of a rigid substrate or a flexible substrate.
As shown in FIGS. 3 or 4, the circuit board 41 is formed with a circular substrate opening 413 penetrating the front and back surfaces 411 and 412. Then, a magnetic material 44 such as a columnar ferrite is inserted into the substrate opening 413 with both ends protruding from the front and back surfaces 411 and 412 of the circuit board 41.

The loop antenna 42 is provided on the circuit board 41 and is formed (pattern formation) as a circuit pattern wound around the substrate opening 413. In the first embodiment, the loop antenna 42 is formed in a loop shape on the outdoor surface 411 between the first and second layers 41a and 41b and between the second and third layers 41b and 41c, respectively. 1, It is configured to be electrically connected to each other through through holes (not shown) formed in the second layers 41a and 41b. Then, the loop antenna 42 is used to read the identification information peculiar to the RFID tag in a non-contact manner by wireless communication using the electromagnetic induction action with the RFID tag described above. Specifically, the loop antenna 42 is energized by a control unit (not shown) mounted on the circuit board 41 to transmit an electromagnetic wave that is a power source of the above-mentioned RFID tag by an electromagnetic induction action, and is said to be the same. An electromagnetic wave that serves as a transmission command for the identification information of the RFID tag is transmitted. Further, the loop antenna 42 receives the identification information transmitted from the RFID tag.

The conductor 43 is provided on the circuit board 41 and is formed (patterned) as a solid pattern (for example, a copper foil pattern) provided around the substrate opening 413. In the first embodiment, the conductor 43 is formed between the second and third layers 41b and 41c. That is, a part of the loop antenna 42 is arranged on the RFID tag side described above with respect to the conductor 43. Further, as shown in FIG. 4, the conductor 43 is a part of the entire circumference of the circumferential CD in a range occupied by the circumferential CD surrounding the loop antenna 42 when the loop antenna 42 is viewed in a plane. More specifically, the conductor 43 has a conductor opening 431 that surrounds the loop antenna 42 when the loop antenna 42 is viewed in a plane. Further, the conductor 43 is formed with a notch 433 cut out from the edge of the conductor opening 431 to the outer edge 432 of the conductor 43.

According to the first embodiment described above, the following effects are obtained.
5 and 6 are diagrams illustrating the effect of the first embodiment. Specifically, FIG. 5 schematically shows the magnetic flux MF generated by the loop antenna 42 in the case where the conductor 43 is not provided, which corresponds to the conventional configuration. FIG. 6 corresponds to the configuration described in the first embodiment, and schematically shows the magnetic flux MF generated by the loop antenna 42 when the conductor 43 is provided. In FIGS. 5 and 6, for convenience of explanation, the loop antenna 42 is shown as a coil, and the circuit board 41 and the resin material Re are omitted.
By the way, when the loop antenna 42 provided in the cylinder cover 3 is energized, an eddy current is generated in the cylinder cover 3 so as to block the magnetic field generated by the energization. When the conductor 43 is not provided, the magnetic flux MF generated by the loop antenna 42 is affected by the eddy current generated in the cylinder cover 3 and draws a relatively small loop as shown in FIG. .. Therefore, the radio wave output from the loop antenna 42 toward the RFID tag described above becomes relatively small, and the reading performance of the identification information of the RFID tag deteriorates.

On the other hand, in the lock cylinder unit 1 according to the first embodiment, a conductor 43 is provided around the loop antenna 42 when the loop antenna 42 is viewed in a plane. Therefore, when the loop antenna 42 is energized, an eddy current is generated in the conductor 43 so as to block the magnetic field generated by the energization. Here, the conductor 43 is a part of the entire circumference of the circumferential CD in a range occupied by the circumferential CD surrounding the loop antenna 42 when the loop antenna 42 is viewed in a plane. That is, since the eddy current generated in the conductor 43 does not flow all around the circumferential direction CD, the magnetic field generated in the loop antenna 42 is not weakened. Further, since the conductor 43 is provided around the loop antenna 42 when the loop antenna 42 is viewed in a plane, the magnetic flux MF generated by the loop antenna 42 is caused by the eddy current generated in the conductor 43. And go around the space separated by the amount of the conductor 43. As a result, as shown in FIG. 6, even when the loop antenna 42 is covered with the cylinder cover 3, the magnetic flux MF generated by the loop antenna 42 draws a relatively large loop. Therefore, according to the lock cylinder unit 1 according to the present invention, the radio wave output from the loop antenna 42 toward the RFID tag described above is relatively large, and the reading performance of the identification information of the RFID tag is improved. be able to.

Further, in the lock cylinder unit 1 according to the first embodiment, a part of the loop antenna 42 is arranged on the RFID tag side described above with respect to the conductor 43. Therefore, for example, as compared with the configuration in which the conductor 43 is arranged on the RFID tag side described above with respect to the loop antenna 42, the magnetic field blown to the RFID tag side described above by the loop antenna 42 is most likely to be repelled by the conductor 43. It will be less. That is, the radio wave intensity of the radio wave output from the loop antenna 42 toward the RFID tag described above is increased. Therefore, even if the IC card held over the lock cylinder unit 1 is slightly displaced in the vertical direction or the horizontal direction with respect to the loop antenna 42 when the loop antenna 42 is viewed in a plane, data reading is performed. The device 4 can satisfactorily perform wireless communication with the RFID tag mounted on the IC card.

Further, in the lock cylinder unit 1 according to the first embodiment, the loop antenna 42 and the conductor 43 are each patterned on the circuit board 41. Therefore, the data reading device 4 can be compactly assembled, and the lock cylinder unit 1 can be miniaturized.

(Embodiment 2)
Next, the second embodiment will be described.
In the following description, the same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted or simplified.
FIG. 7 is a view corresponding to FIG. 3, and is a cross-sectional view of the data reading device 4A according to the second embodiment. FIG. 8 is a view corresponding to FIG. 4, and is a view of the data reading device 4A as viewed from the outdoor side.
In the data reading device 4 according to the first embodiment described above, the conductor 43 is formed on the circuit board 41 as a solid pattern.
On the other hand, in the data reading device 4A according to the second embodiment, as shown in FIG. 7 or 8, the conductor 43A is configured as a separate body from the circuit board 41, and a fixing tool such as a screw (not shown). ) Is attached to the circuit board 41.

Specifically, the conductor 43A is arranged in a posture facing the outdoor surface 411 of the circuit board 41. Further, the conductor 43A is composed of a substantially truncated cone-shaped cylinder whose diameter increases as it is separated from the surface 411 (toward the RFID tag described above). That is, the conductor 43A has a shape protruding from the loop antenna 42 side toward the RFID tag side described above. Also in the second embodiment, as shown in FIG. 8, the conductor 43A looks at the loop antenna 42 in a plane and looks at the loop antenna 42 in the same manner as the conductor 43 described in the first embodiment described above. The range occupied by the surrounding circumferential CD is a part of the entire circumference of the circumferential CD. More specifically, in the conductor 43A, the first conductor opening 431A on the upper bottom side of the truncated cone and the second conductor opening 432A on the lower bottom side surround the loop antenna 42 when the loop antenna 42 is viewed in a plan view. .. Further, the conductor 43A is formed with a notch 433A cut out from the edge of the first conductor opening 431A to the edge of the second conductor opening 432A.

According to the second embodiment described above, in addition to the same effects as those of the first embodiment described above, the following effects are obtained.
In the data reading device 4A according to the second embodiment, the conductor 43A has a shape protruding from the loop antenna 42 side toward the RFID tag side described above. That is, since the magnetic flux MF generated by the loop antenna 42 bypasses the conductor 43A due to the eddy current generated in the conductor 43A, a relatively large loop is drawn toward the RFID tag side described above. Therefore, the communicable range from the loop antenna 42 to the RFID tag described above can be effectively expanded, and the reading performance of the identification information of the RFID tag can be further improved.

(Other embodiments)
Although the embodiments for carrying out the present invention have been described so far, the present invention should not be limited only to the above-described embodiments 1 and 2.
In the first and second embodiments described above, the conductors 43 and 43A may occupy a part of the entire circumference of the circumferential CD when the loop antenna 42 is viewed in a plane and surrounds the loop antenna 42. For example, the shape is not limited to the shape described in the above-described first and second embodiments. For example, in the second embodiment, the conductor 43A is composed of a substantially truncated cone-shaped cylinder whose diameter increases toward the above-mentioned RFID tag, but is not limited to this, and is configured to have a substantially cylindrical shape. It doesn't matter.
In the above-described first and second embodiments, in the cylinder cover 3, a communication module that communicates with a smartphone or the like (for example, BLE (Bluetooth Low Energy) communication or the like) in addition to the cylinder lock 2 and the data reading devices 4 and 4A. , A human sensor or the like that detects the whereabouts of a human may be installed.
In the above-described first and second embodiments, the circuit board 41 is composed of a three-layer multilayer board, but is not limited to this, and may be composed of a single-layer board, or may be composed of two layers or four or more layers. It may be composed of the multilayer board of.

1 Lock cylinder unit 2 Cylinder lock 3 Cylinder cover 4, 4A Data reader 21 Outer cylinder 22 Plug 41 Circuit board 41a to 41c 1st to 3rd layers 42 Loop antenna 43, 43A Conductor 44 Magnetic material 100 Door 101 Door end side End face 102 Outdoor outer surface 200 Lock case 201 Deadbolt 221 Keyhole 411,412 Front, back 413 Board opening 431 Conductor opening 431A First conductor opening 432 Outer edge 432A Second conductor opening 433,433A Notch CD circumferential direction MF magnetic flux Re resin material

Claims (4)

A cylinder lock that has a mechanical key inserted and accepts locking and unlocking operations by the user,
A loop antenna provided outside the cylinder lock and wound around a predetermined axis to read the data of the IC tag in a non-contact manner by wireless communication using an electromagnetic induction action with the IC tag. When,
A conductor provided around the loop antenna when viewed from a direction along the axis, and
It comprises the cylinder lock, the loop antenna, and a metal cylinder cover having a tubular shape into which the conductor is inserted.
The conductor is
A lock cylinder unit characterized in that a range occupied in the circumferential direction surrounding the loop antenna when viewed from a direction along the axis is a part of the entire circumference in the circumferential direction. At least a part of the loop antenna
The lock cylinder unit according to claim 1, wherein the cylinder unit is arranged on the IC tag side with respect to the conductor. The loop antenna and the conductor
The lock cylinder unit according to claim 1 or 2, wherein each pattern is formed on a circuit board. The conductor is
The lock cylinder unit according to claim 1, wherein the cylinder unit has a shape protruding from the loop antenna side toward the IC tag side.

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