JPH0460074A - Key ridge detector - Google Patents
Key ridge detectorInfo
- Publication number
- JPH0460074A JPH0460074A JP17086090A JP17086090A JPH0460074A JP H0460074 A JPH0460074 A JP H0460074A JP 17086090 A JP17086090 A JP 17086090A JP 17086090 A JP17086090 A JP 17086090A JP H0460074 A JPH0460074 A JP H0460074A
- Authority
- JP
- Japan
- Prior art keywords
- key
- magnetic
- circuit
- barrel
- magnetic circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000696 magnetic material Substances 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims abstract description 5
- 238000013459 approach Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract 2
- 230000005389 magnetism Effects 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Landscapes
- Lock And Its Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は1機械的および電気的な鍵情報を組み合わせて
構成される鍵装置の鍵の鍵山検出器に係り、特に磁性材
料からなる鍵と鍵筒側の磁性体部材との間の磁気結合に
より鍵山情報を検出して不正解錠防止を行なわせるのに
好適な鍵山検出器に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a key pile detector for a key of a key device configured by combining mechanical and electrical key information, and particularly relates to a key pile detector for a key made of a magnetic material. The present invention relates to a key pile detector suitable for detecting key pile information through magnetic coupling with a magnetic member on the key barrel side to prevent unauthorized unlocking.
鍵装置は、例えば住宅や自動車の扉、種々の機器に広く
用いられている。近年鍵装置としては古くから使用され
ている機械的な鍵に代って、磁気コードや光コードを検
出する方法の電気的若しくは電子的鍵が使用されたり、
あるいは両者を併用することにより信頼性の高い鍵がつ
くられたりしている。例えば、第7図に示すように、両
側に鍵山1a、lbを有する鍵1の側面に縞状の白黒パ
ターンのいわゆるバーコードを設け、このバーコードを
発光素子3と受光素子4で読取り、予め登録されている
パターンと一致し、かつ鍵山1a1bも一致した場合に
は解錠可能とする鍵構造になっている。Key devices are widely used, for example, in doors of houses and automobiles, and in various devices. In recent years, instead of the mechanical keys that have been used for a long time, electric or electronic keys that detect magnetic codes or optical codes are being used as key devices.
Alternatively, highly reliable keys can be created by using both together. For example, as shown in FIG. 7, a so-called barcode in a striped black and white pattern is provided on the side surface of a key 1 having locks 1a and lb on both sides, and this barcode is read by a light emitting element 3 and a light receiving element 4, The key structure is such that the lock can be unlocked if it matches the registered pattern and the key pile 1a1b also matches.
上記方式の光学的な鍵装置は、バーコードのパターンが
簡単に読み取られ複製鍵が作られ易く、また汚れ等にも
影響され易い。さらにはパターンを読取る光学系に精度
を要し、また高度な判別回路も要することで比較的高価
になるという問題がある。In the optical key device of the above-mentioned type, barcode patterns are easily read, duplicate keys are easily made, and it is also susceptible to dirt and the like. Furthermore, the optical system for reading the pattern requires precision, and a sophisticated discrimination circuit is also required, making it relatively expensive.
本発明の目的は、簡単かつ安価な構造で不正解錠を防止
することができる信頼性の高い鍵装置の鍵山検出器を提
供するにある。An object of the present invention is to provide a highly reliable key pile detector for a key device that can prevent unauthorized unlocking with a simple and inexpensive structure.
上記目的を達成するために、本発明の鍵山検出器は磁性
材料からなり鍵山が形成され、?−鍵と、鍵穴を有する
鍵筒と、該鍵筒の鍵孔の周囲に設けられ前記鍵の接近時
に磁気回路が形成される磁性体部材と、前J己鍵山形状
に応じて変化する磁気回路の磁気特性を検出する手段と
から構成されている。In order to achieve the above object, the key peak detector of the present invention is made of a magnetic material and has a key peak formed therein. - a key, a key barrel having a keyhole, a magnetic member provided around the keyhole of the key barrel and forming a magnetic circuit when the key approaches, and a magnetic circuit that changes depending on the shape of the front key thread. and means for detecting the magnetic properties of the magnetic field.
#I筒の鍵孔に正規の鍵を挿入すると、鍵孔の周囲に設
けられた磁性体部材に磁気回路が形成される。この磁気
回路の磁気特性は鍵の断面積によって決まり、この断面
積は鍵山の位置によって異なる。したがって、鍵山の形
状によって鍵固有の磁気特性が得られるので、この磁気
特性を検出手段により検出し、正規の鍵の磁気特性と比
較して一致したときに解錠可能とすることができる。When a regular key is inserted into the keyhole of the #I cylinder, a magnetic circuit is formed in the magnetic material provided around the keyhole. The magnetic properties of this magnetic circuit are determined by the cross-sectional area of the key, and this cross-sectional area varies depending on the position of the key. Therefore, since the magnetic characteristics unique to the key are obtained by the shape of the key, this magnetic characteristic is detected by the detection means, and when the magnetic characteristics match the magnetic characteristics of the regular key, the lock can be unlocked.
〔実施例〕 以下、本発明の実施例を図面を参照して説明する。〔Example〕 Embodiments of the present invention will be described below with reference to the drawings.
第1図は鍵の挿入によってコ字状の磁性体との間で変化
する磁気抵抗を検出する鍵山検出器の概略構成か示され
ている。鍵1は鉄などの磁性材t4て板状に形成されて
おり、対向する2辺にはそれぞれ複数個の鍵山1 a、
1 bが形成されている。FIG. 1 schematically shows the structure of a key peak detector that detects the magnetic resistance that changes between the key and the U-shaped magnetic body when the key is inserted. The key 1 is formed into a plate shape using a magnetic material t4 such as iron, and has a plurality of key locks 1a on each of two opposing sides.
1b is formed.
また図示しない鍵装置に設けられた鍵筒2の前部端面に
は鍵穴2a設けられている。鍵穴2aの内側の周囲には
コ字状の磁性体3が取付けられており、磁性体3の一部
には電気コイル4が巻回されている。才な電気コイル4
には、第2図に示すように、電気コイル4のインダクタ
ンスを測定する電気回路5が接続されており、この電気
回路5によって鍵1の鍵山1a、lbの形状を電気的に
検出する。電気回路5にはこの電気信号を正規の鍵山形
状による電気信号と比較して、一致するか否かを判別す
る判別回I@6が接続されており、判別回路6が両信号
の一致を判別したときに解錠機構7を作動させて解錠可
能とするようになっている。Further, a keyhole 2a is provided in the front end face of a key barrel 2 provided in a key device (not shown). A U-shaped magnetic body 3 is attached around the inside of the keyhole 2a, and an electric coil 4 is wound around a part of the magnetic body 3. smart electric coil 4
As shown in FIG. 2, an electric circuit 5 is connected to measure the inductance of the electric coil 4, and the shapes of the key ridges 1a and lb of the key 1 are electrically detected by this electric circuit 5. A discrimination circuit I@6 is connected to the electric circuit 5, which compares this electric signal with an electric signal based on a regular keychain shape and determines whether they match or not, and the discrimination circuit 6 determines whether the two signals match. When this occurs, the unlocking mechanism 7 is operated to enable unlocking.
次に本実施例の作用を説明する。m第2の鍵穴2aに1
1を挿入する過程で、鍵1はコ字状の磁性体3の内側に
入り、鍵1と磁性体3との間で空隙を介して磁気回路を
形成する。この磁気回路は#11の挿入位置によってそ
の磁気抵抗が変化する。Next, the operation of this embodiment will be explained. m 1 in the second keyhole 2a
In the process of inserting the key 1, the key 1 enters inside the U-shaped magnetic body 3, and a magnetic circuit is formed between the key 1 and the magnetic body 3 through a gap. The magnetic resistance of this magnetic circuit changes depending on the insertion position of #11.
すなわち、鍵1が担う磁気回路の磁路長は鍵1の厚さt
で一定であるが、その断面積はそれぞれの鍵山1a、1
bの位置によって異なり、鍵1の幅に比例する。例えば
、mlの先端部分の幅はaであり、隣接する鍵山部分の
幅はbであって、b>aであるので、磁気回路の磁気抵
抗は鍵山部分の方が先端部分より小さくなる。このよう
に鍵1を鍵穴2aに順次挿入していくことにより、鍵山
1a。In other words, the magnetic path length of the magnetic circuit carried by the key 1 is the thickness t of the key 1.
The cross-sectional area is constant at each key peak 1a, 1
It varies depending on the position of b and is proportional to the width of the key 1. For example, the width of the tip of ml is a, and the width of the adjacent key thread is b, and b>a, so the magnetic resistance of the magnetic circuit is smaller at the key thread than at the tip. By sequentially inserting the keys 1 into the keyholes 2a in this way, the locks 1a.
1bの形状の変化に応じて、鍵1と磁性体3とが形成す
る磁気回路が変化する。The magnetic circuit formed by the key 1 and the magnetic body 3 changes according to the change in the shape of the key 1b.
一方、磁性体3には電気コイル4が巻回されており、こ
の電気コイル4のインダクタンスは磁気回路の磁気抵抗
の変化に応じて変化する。磁気抵抗とインダクタンスと
の関係は反比例の関係にあり、磁気抵抗が増すとインダ
クタンスは小さくなる。したがって、電気回路5によっ
て電気コイル4のインダクタンスを測定することにより
、鍵1の鍵山1 a、l bに応じた電気信号が得られ
る。On the other hand, an electric coil 4 is wound around the magnetic body 3, and the inductance of this electric coil 4 changes according to changes in the magnetic resistance of the magnetic circuit. The relationship between magnetic resistance and inductance is inversely proportional; as magnetic resistance increases, inductance decreases. Therefore, by measuring the inductance of the electric coil 4 using the electric circuit 5, an electric signal corresponding to the locks 1a, lb of the key 1 can be obtained.
この電気信号を判定回11!r 6に入力し、予め記憶
されている正規の鍵1のインダクタンスに対する電気信
号と比較して、一致していれば解錠機構7を作動させる
ことにより電気的に解錠可能となり、鍵1と一緒に鍵筒
2を回動させて解錠する。Judging this electrical signal 11th time! r 6 and compare it with the electrical signal for the inductance of the regular key 1 stored in advance. If they match, the unlocking mechanism 7 can be activated to electrically unlock the key, and the key 1 and Rotate the key barrel 2 together to unlock.
本実施例によれば、従来の機械的解錠装置と組み合わせ
ることにより2重の鍵装置となり、不正解錠を確実に防
止することができる。しかも磁気的手段により非接触で
鍵山1 a、1 bを検出するので、可動部がなく信頼
性を向上させることができる。さらに鍵1の位置が鍵穴
2a内で上下または左右に多少ずれても、磁気抵抗の変
化に大きく影響することはなく、容易に解錠することが
できる。According to this embodiment, by combining with a conventional mechanical unlocking device, it becomes a double key device, and unauthorized unlocking can be reliably prevented. Furthermore, since the key threads 1a and 1b are detected non-contact by magnetic means, there are no moving parts and reliability can be improved. Furthermore, even if the position of the key 1 is slightly shifted vertically or horizontally within the keyhole 2a, the change in magnetic resistance is not significantly affected and the lock can be unlocked easily.
以下に本発明の他の実施例を説明する。なお、第1図に
示す第1の実施例の部分と同一または同等部分には同一
符号を付して示し、その説明を省略する。Other embodiments of the present invention will be described below. Note that parts that are the same as or equivalent to those of the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and their explanations will be omitted.
第3図は電気コイルを口字状の磁性体3の中間辺に設け
た構造の鍵山検出器が示されている。口字状の磁性体3
はその中間辺を鍵穴2aの長手方向に平行に配設し、こ
の中間辺に電気コイル4を巻回したものである。FIG. 3 shows a key pile detector having a structure in which an electric coil is provided on the middle side of a mouth-shaped magnetic body 3. Mouth-shaped magnetic material 3
The intermediate side thereof is arranged parallel to the longitudinal direction of the keyhole 2a, and the electric coil 4 is wound around this intermediate side.
鍵1が担う磁気回路の磁路長はIIの幅(例えば第1図
に示すa、b)であり、それぞれの鍵山Ia、Ibの位
置によって異なる。一方磁気回路の断面積は一定で変化
しない。したがって、この場合も#11を鍵孔2aに挿
入することによりそれぞれの鍵山1 a、1 bで磁路
長が変わり、磁気抵抗の値が変化する。例えば、鍵1の
先端部分の幅aと隣接する鍵山部分の幅すとはbaaの
関係があり、鍵山部分の方が鍵1が担う磁路長は長くな
るが、一方空隙は短くなる。そのなめ、全体の磁気抵抗
としては鍵山部分の方が小さくなる。これは空隙の磁気
抵抗の方が磁性体の磁気抵抗より大きいためである。こ
のように鍵1を挿入していけばそれぞれの鍵山によって
磁気抵抗が変化し、第1の実施例と同様に鍵山1 a、
1 bを電気的に検出することができる。The magnetic path length of the magnetic circuit carried by the key 1 is the width II (for example, a and b shown in FIG. 1), and differs depending on the position of each key thread Ia and Ib. On the other hand, the cross-sectional area of the magnetic circuit is constant and does not change. Therefore, in this case as well, by inserting #11 into the key hole 2a, the magnetic path length changes in each key thread 1a, 1b, and the value of magnetic resistance changes. For example, there is a relationship baa between the width a of the tip of the key 1 and the width of the adjacent key thread part, and the magnetic path length carried by the key 1 is longer in the key thread part, but on the other hand, the air gap is shorter. As a result, the overall magnetic resistance is smaller at the key crest. This is because the magnetic resistance of the air gap is greater than that of the magnetic material. As the key 1 is inserted in this way, the magnetic resistance changes depending on each key thread, and as in the first embodiment, the key threads 1a, 1a,
1b can be detected electrically.
第4図はホール素子を用いた鍵山検出器か示されている
。口字状の磁性体3は鍵穴2aの長手方向に平行な対向
する四角柱状の磁性体3a、3bを四角柱の永久磁石6
で連結されている。一方の連結部には磁気を検出して電
気信号に変換するホール素子や磁気抵抗素子などの磁気
感応素子5が設けられている。永久磁石6は長手方向に
磁化されている。FIG. 4 shows a key peak detector using a Hall element. The mouth-shaped magnetic body 3 is a quadrangular prism-shaped permanent magnet 6 which is parallel to the longitudinal direction of the keyhole 2a and is opposed to the square prism-shaped magnetic bodies 3a and 3b.
are connected. A magnetically sensitive element 5 such as a Hall element or a magnetoresistive element that detects magnetism and converts it into an electric signal is provided at one of the connecting parts. The permanent magnet 6 is magnetized in the longitudinal direction.
鍵1を鍵穴2aに挿入すると、永久磁石6を有する磁性
体3a、3bと鍵1とで磁気回路が形成され、この磁気
回路内において永久磁石6が発生する磁気が閉ループを
成す。磁気感応素子5はこの閉ループ内の磁気の磁束密
度を検出する。When the key 1 is inserted into the keyhole 2a, a magnetic circuit is formed between the magnetic bodies 3a, 3b having the permanent magnet 6 and the key 1, and within this magnetic circuit, the magnetism generated by the permanent magnet 6 forms a closed loop. The magnetically sensitive element 5 detects the magnetic flux density within this closed loop.
ところで、第1の実施例と同様に磁気回路の磁気抵抗は
鍵1の鍵山の位置によって異なる。一方磁気回路内の磁
束密度は磁気抵抗に反比例するので、磁気感応素子5に
よって検出される磁気密度、すなわち磁気感応素子5か
ら発する電気信号により、鍵1の鍵山1 a、1 bを
検出することができる。Incidentally, as in the first embodiment, the magnetic resistance of the magnetic circuit differs depending on the position of the key crest of the key 1. On the other hand, since the magnetic flux density in the magnetic circuit is inversely proportional to the magnetic resistance, the locks 1 a and 1 b of the key 1 can be detected by the magnetic density detected by the magnetically sensitive element 5, that is, by the electric signal emitted from the magnetically sensitive element 5. I can do it.
第5図は、ホール素子を用いた他の実施例で、永久磁石
6に替えて電気コイル7により構成した鍵山検出器が示
されている。四角柱状の磁性体3Cには電気コイル7が
巻回されており、この電気コイル7に電流を流すことに
より磁気を発生している。FIG. 5 shows another embodiment using a Hall element, and shows a key peak detector constructed of an electric coil 7 instead of the permanent magnet 6. An electric coil 7 is wound around the rectangular columnar magnetic body 3C, and magnetism is generated by passing a current through the electric coil 7.
本実施例の作用は、第3の実施例とほぼ同様であるが、
発生する磁気を電気的に制御することができ、安定しな
磁気を供給することができる。The operation of this embodiment is almost the same as that of the third embodiment, but
The generated magnetism can be electrically controlled and stable magnetism can be supplied.
第6図は2個の電気コイル4を用いた鍵山検出器が示さ
れている。口字状の磁性体3には第1の電気コイル4a
と第2の電気コイル4bとが巻回されている。なお、こ
れら2個の電気コイル4a。FIG. 6 shows a key pile detector using two electric coils 4. The mouth-shaped magnetic body 3 has a first electric coil 4a.
and a second electric coil 4b are wound. Note that these two electric coils 4a.
4bは同一位置において重ねて巻回してもよい。4b may be wound in an overlapping manner at the same position.
本実施例では、第1の実施例と同様に鍵山による鍵1と
磁性体3が形成する磁気回路の磁気抵抗の変化を電気的
に検出できる。すなわち、第1の電気コイル4aと第2
の電気コイル4bとは磁気回路により磁気的に結合され
ており、両者の相互コンダクタンスは磁気回路の磁気抵
抗に反比例する。したがって、第1の電気コイル4aに
一定の交流電流を流すと、第2の電気コイル4bの両端
には磁気回路の磁気抵抗に反比例した電圧が発生するた
め、この電圧からflllの鍵山1a、lbが検出でき
る。In this embodiment, as in the first embodiment, changes in the magnetic resistance of the magnetic circuit formed by the key 1 and the magnetic body 3 can be electrically detected. That is, the first electric coil 4a and the second
It is magnetically coupled to the electric coil 4b by a magnetic circuit, and the mutual conductance between the two is inversely proportional to the magnetic resistance of the magnetic circuit. Therefore, when a constant alternating current is passed through the first electric coil 4a, a voltage that is inversely proportional to the magnetic resistance of the magnetic circuit is generated at both ends of the second electric coil 4b. can be detected.
上述のとおり、本発明によれは、従来の1m!械的解錠
装置と組み合わせることにより2重の鍵装置となり、不
正解錠を確実に防止することができる。As mentioned above, according to the present invention, the distance is 1 m! By combining it with a mechanical unlocking device, it becomes a double key device and can reliably prevent unauthorized unlocking.
しかも磁気的手段により非接触で鍵山を検出するので、
構造が簡単となり、しがも可動部がなく鍵山検出の信頼
性を向上させることができる。Moreover, since the key pile is detected non-contact by magnetic means,
The structure is simple and there are no moving parts, so the reliability of key pile detection can be improved.
第1図は本発明の第1の実施例の構成を示す斜視図、第
2図は鍵情報を処理するブロック図、第3図、第4図、
第5図及び第6図はそれぞれ本発明の第2、第3、第4
及び第5の実施例の構成を示す斜視図、第7図は従来の
光学式鍵装置の基本構成図である。
1・・・鍵、
1 a
1 b・
鍵山、
鍵筒
a
鍵孔、
磁性体、4゜
電気コイル、
・・磁
気感応素子、
・永久磁石(磁気発生手段)。FIG. 1 is a perspective view showing the configuration of the first embodiment of the present invention, FIG. 2 is a block diagram for processing key information, FIGS. 3 and 4,
5 and 6 are the second, third, and fourth embodiments of the present invention, respectively.
FIG. 7 is a perspective view showing the configuration of a fifth embodiment, and FIG. 7 is a basic configuration diagram of a conventional optical key device. 1... Key, 1 a 1 b, Key stock, Key barrel a, Key hole, Magnetic material, 4° electric coil, ... Magnetic sensing element, - Permanent magnet (magnetism generating means).
Claims (1)
有する鍵筒と、該鍵筒の鍵孔の周囲に設けられ前記鍵の
接近時に磁気回路が形成される磁性体部材と、前記鍵山
形状に応じて変化する磁気回路の磁気特性を検出する手
段とから構成された鍵山検出器。(1) A key made of a magnetic material and having a lock formed thereon, a key barrel having a keyhole, a magnetic member provided around the keyhole of the key barrel and forming a magnetic circuit when the key approaches; A key pile detector comprising means for detecting magnetic characteristics of a magnetic circuit that change depending on the shape of the key pile.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17086090A JPH0460074A (en) | 1990-06-28 | 1990-06-28 | Key ridge detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17086090A JPH0460074A (en) | 1990-06-28 | 1990-06-28 | Key ridge detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0460074A true JPH0460074A (en) | 1992-02-26 |
Family
ID=15912657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17086090A Pending JPH0460074A (en) | 1990-06-28 | 1990-06-28 | Key ridge detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0460074A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100413090B1 (en) * | 2001-07-28 | 2003-12-31 | 주식회사 뉴웰 | A Security Key Using Form Recognition Order And Operating Method Thereof |
JP2009270430A (en) * | 2008-04-30 | 2009-11-19 | Siemens Ag | Key switch |
-
1990
- 1990-06-28 JP JP17086090A patent/JPH0460074A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100413090B1 (en) * | 2001-07-28 | 2003-12-31 | 주식회사 뉴웰 | A Security Key Using Form Recognition Order And Operating Method Thereof |
JP2009270430A (en) * | 2008-04-30 | 2009-11-19 | Siemens Ag | Key switch |
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