JPH0634533Y2 - Magnetically sensitive key device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a magnetically sensitive key device that prompts opening and locking with a key code, and more particularly to a magnetically sensitive key device using a vegan wire.

(Prior Art) A key using a magnetic material having a special structure called a vegan wire has been proposed in order to ensure the reading of a key code signal (Japanese Patent Laid-Open No. 55-155879).

The vegan wire has a core portion made of soft magnetic material and a surface portion made of hard magnetic material by subjecting a certain alloy to a special treatment. According to such a vegan wire, it is possible to change the magnetization direction of the core portion by an external magnetic field, and the magnetization direction of the core portion and the magnetization direction of the surface portion are made to coincide with each other or reverse to pass through the vegan wire. It is possible to give a large change to the magnetic flux to be generated. By making such a change abruptly, a relatively large voltage can be induced in the detection coil.

(Problems to be solved by the invention) However, in the above-mentioned magnetic sensitive key using the vegan wire, the key is read by inserting / removing the key, but the key inserting / removing speed varies depending on the operator. In addition, even if the same person, the speed is different each time they are inserted and removed, so the key code cannot be read accurately.

(Means and Actions for Solving Problems) In order to achieve this object, according to the present invention, a plurality of vegan wires extending in a certain direction and arranged substantially parallel to each other are embedded in a resin base body. It is equipped with a magnetic sensitive key and an unlocking drive circuit provided on the side of the object to be locked and unlocked, and a predetermined key code generated by the magnetic sensitive key is detected by the unlocking drive circuit and collation judgment with a set key code is performed. By performing, when the generated key code and the set key code match, the locking and unlocking drive circuit activates the locking and unlocking mechanism, and the locking and unlocking drive circuit, a proximity sensor for detecting the approach of a human, A detection unit for reading the key code of the magnetically-sensitive key, and a detection unit that operates when the proximity sensor senses an approach of a person to read the key code of the magnetically-sensitive key. Therefore, a detection unit driving device for moving the detection unit substantially parallel to the arrangement direction of the vegan wire of the magnetically sensitive key is provided.

According to such a structure, the resin base body on the key side may be arbitrarily formed in accordance with the mounting side base body, and the vegan wire can be easily embedded, so that the structure of the magnetically sensitive key device is simple. Can be Furthermore, since the detection unit side is designed to be movable, if the resin base (key) with the vegan wire embedded is pressed against the detection unit section of the vehicle body during use, the detection unit will move in parallel and the code arrangement Can be read.

(Embodiment of the Invention) An embodiment of the invention will be described below with reference to the accompanying drawings.
In addition, in each figure, the same reference numerals denote the same objects.

FIG. 1 shows a magnetically sensitive key (1) according to an embodiment of the present invention.
A plurality of vegan wires (2) extending in a certain direction and arranged substantially parallel to each other are embedded in a resin base body (3). The resin base body (3) serves as a housing for the mechanical key (4) as shown in FIG. In this mechanical key (4), the main portion (4a) of the key (4) is inserted into the slit portion (3a) of the base body (3), and at this time, the pin portion (4b) corresponds to the corresponding portion of the base body (3). So that it fits into a recess (not shown) provided in the. Normally, a magnetic sensitive key is used for unlocking, but in the case of an abnormality such as a failure of the electronic circuit or deterioration of the battery power that operates the door lock actuator, the mechanical key can be used to unlock the door key as before. .

In addition, in the above-described embodiment, as shown in FIG. 1 (d), a vegan wire may be provided on the grip portion of the key.

Further, the resin base body in which the vegan wire is embedded is formed into a flat card shape independent of the key, and if a fixing means is provided on the back surface thereof to an arbitrary mounting body such as double-sided tape or Velcro (registered trademark), the card The user can freely select the attachment such as a notebook or bracelet.

Here, the vegan wire (2) constituting the magnetically sensitive key (1) is, as described in the section of "Prior Art",
It has a composite structure of hard magnetism and soft magnetism, and a magnetic cord can be constructed by properly arranging this vegan wire with an ordinary wire wire, that is, each wire of FIG. 1 (c) ( 2-1 to 2-8), white indicates a normal wire line, that is, a dummy line (logic 0), and black (diagonal line) is a vegand wire (logic 1). It can be made appropriately.

Also, if the dummy wire has the same shape as the vegan wire, even if the array can be visually recognized by the transmitted light, the vegan wire array code cannot be read because it is an evenly-spaced array and has the same shape, and an imitation product cannot be made. . The second aspect of generating a code signal by such a vegan wire (2)
It will be described with reference to the drawings.

It is assumed that the vegan wire (2) traveling in the direction of arrow A is detected by the detection unit (5), and the polarity of the hard magnetic portion, that is, the surface portion of the vegan wire (2) is as illustrated. The detection unit (5) comprises a first drive magnet (6), a detection coil (7), and a second drive magnet (8), which are sequentially arranged in the traveling direction of the vegan wire (2). The polarities of the magnets (6) and (8) are as shown. The detection coil (7) is arranged closer to the second drive magnet (8).

Here, the vegan wire (2) is progressing and the first
When approaching the drive magnet (6) of, the soft magnetic portion, ie, the core, and the hard magnetic portion, ie, shell, of the vegan wire (2) become saturated due to the external magnetic field and are magnetically oriented in the same direction. Only the polarity of the core portion having a weak magnetic resistance changes as it approaches the second drive magnet (8). Therefore, the magnetic fields of the core portion and the surface portion of the vegan wire (2) cancel each other, and almost no magnetic field appears outside the wire (2). In this state, when the vegan wire (2) further advances and passes near the detection coil (7) and the second drive magnet (8), the surface part of the vegan wire (2) is opposite to the one before. Since it is magnetized in polarity, the magnetic flux changes abruptly. The detection coil (7) detects this magnetic flux change and induces a voltage at the output end of the coil. Thus, vegan wire (2)
The pulse voltage can be obtained by detecting the magnetic flux change caused by the internal magnetic field being rapidly jumped by the external magnetic field to change the magnetic state of the polarity of the soft magnetic portion.

The output of the detection coil (7) is supplied to an unlocking / locking drive circuit as shown in FIG. 3, for example. That is, although the output voltage of the detection coil (7) is relatively large and is about 0.5 to 12 volts, the waveform shaping circuit (31) discriminates noise from a signal at a predetermined boundary level and shapes this signal waveform. Then, a pulse signal is obtained and amplified by a signal amplifier circuit (32) to a signal of a required size. The signal discriminating circuit (33) is a kind of decoder, and assigns, for example, input signals that reach the detection level to logic 1 and assigns those that do not reach the detection level to logic 0. In this way, logic 1,0 is applied to the output terminal of the signal discrimination circuit (33).
It is possible to obtain a code signal composed of the signal train of. The signal judging circuit (34) judges whether or not the key code set in the memory (35) and the inputted key code coincide with each other by using this signal as a key code signal. In addition, the signal determination circuit (34) includes an actuator (37) for performing locking / unlocking.
The current state (whether it is unlocked or locked) is entered. Therefore, when the input key code and the setting key code match, the current state of the actuator (37) is judged, and if it is in the unlocked state, it is in the locked state, and if it is in the locked state, it is in the unlocked state. Activate (36).

FIG. 4 shows how the door of the automobile is opened and closed by such a magnetically sensitive key device. To read the key code signal of the magnetic sensitive key (1), it is necessary to move the magnetic sensitive key (1) relative to the detection unit (5), but in FIG. 4, the detection unit (5) is detected. Shows the case of moving. That is, according to this embodiment, the key code signal reading portion (42) is provided near the door knob (41) of the automobile door (40). As shown in FIG. 4 (b), the key code signal reading portion (42) has a detection unit (5) similar to that described in FIG. 2 arranged on the frame (43) behind the door panel (40). The detection unit (5) is moved by pressing the pressure sensitive switch (44) with the magnetically sensitive key (1) (Fig. 1). Such movement of the detection unit (5) is executed by, for example, a detection unit driving device as shown in FIG. That is, the detection unit (5) is divided into blocks by a resin material or the like, and a linear gear (9) extending in one direction is integrally formed at one end thereof. By engaging the linear gear (9) with the gear (11) of the motor (10), the detection unit (5) is moved by the rotation of the motor (10). Fifth
FIG. 2B shows an electric system of a driving device of such a detection unit (5), and a motor control circuit (12) is controlled by a sensor (44) such as a pressure sensitive switch for detecting the approach of a key wearer. Start and activate the motor (10). here,
The sensor (44) can be mechanical, optoelectronic, ultrasonic, electrostatically induced, or otherwise.

In the above embodiments, the vegan wire was embedded in the key housing, but a double-sided tape was provided on the back surface of the thin base body in which the vegan wire was embedded so that it could be adhered to portable items such as licenses and watches. May be. The timepiece and the magnetically sensitive key may be integrated. It can also be incorporated into a ring. Further, in the above embodiment, the detection unit (5) is moved by the action of the motor (10).
For example, the magnetic code sensitive key (1) itself may be moved by using the key code signal reading portion (42) of the door (40) as a slit-shaped recess.

(Effect of the Invention) According to the present invention, the key code formed by the vegan wire embedded in the resin base is read by the detection unit that moves at a constant speed along the arrangement direction of the vegan wire by the driving device. Because it did, accurate reading is possible.

[Brief description of drawings]

FIG. 1 is an explanatory view of a magnetic sensitive key according to an embodiment of the present invention, FIG. 2 is an explanatory view of a magnetic sensitive key detecting unit according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is an electric system diagram illustrating a key code signal processing circuit of the magnetic sensitive key according to FIG. 4, FIG. 4 is an explanatory diagram when the magnetic sensitive key device according to the embodiment of the present invention is applied to an automobile, and FIG. It is explanatory drawing of the reader of the magnetic sensitive type key in FIG. In the drawings, (1) is a magnetically sensitive key, (2) is a vegan wire, (3) is a resin base, and (5) is a key code signal detection unit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-55-155879 (JP, A) JP-A-59-31368 (JP, A) JP-A-59-170374 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A magnetically sensitive key formed by embedding a plurality of vegan wires, which extend in a certain direction and are arranged substantially parallel to each other, in a resin base, and an unlocking / locking drive circuit provided on the side of the unlocking / symmetrical object. When a predetermined key code generated by the magnetically sensitive key is received by the unlocking / locking drive circuit and collation judgment is performed, the unlocking / locking is performed when the generated key code and the set key code match. In a magnetic sensitive key device, wherein a drive circuit operates an opening / closing lock pore, the opening / locking drive circuit detects a proximity sensor for detecting a human approach, and a detection for reading the key code of the magnetically sensitive key. The unit and the detection unit in front of the magnetically sensitive key to operate when the proximity sensor senses a human approach to read the key code of the magnetically sensitive key. A magnetically sensitive key device, comprising: a detection unit driving device that moves at a constant speed in parallel with the arrangement direction of the vegan wire.