JP2927361B2 - Read timing pulse generation mechanism for key information reader - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a read timing pulse generating mechanism (hereinafter simply referred to as a pulse generating mechanism) of a key information reading apparatus, and in particular, has a simple structure and a reliable operation. In addition, the present invention relates to a pulse generation mechanism capable of associating a generated read timing pulse with a specific key information recording portion of a key.

[Conventional technology]

Here, the key information is, for example, the depth of a V-shaped notch formed on the side edge of the key of a so-called cylinder lock, the depth of a mortar-shaped recess formed on the surface of the key, or the key of a so-called electronic lock. Means the polarity of the permanent magnet buried at the side edge and the presence or absence of magnetization.

In recent years, key information is read as an encoded key information signal by an optical or electrical method, and a composite of a plurality of key information signals for each key (hereinafter referred to as a key signal)
A so-called key information reading device has been proposed and put into practical use, in which electronically collating with each of the key signal groups registered in advance and controlling to unlock the electric lock when the read key signal is the one registered in advance. Is being transformed. If such a key information reading device and an electric lock are installed at a common door of a hotel or a condominium, for example, there is a great advantage that comprehensive building management can be performed without changing the lock of each room.

The key information reading method of the key information reading apparatus is roughly classified into two methods. One is that the key is fully inserted into a keyhole like a keyhole opened on the outer surface of the reader,
A key information detector is provided for each key information recording part, and a plurality of pieces of key information are read out in parallel and at once. However, in this reading method, a large number of key information detectors must be densely provided around a small key, which complicates the structure of the key information reading device.

As another reading method, for example, as described in Japanese Patent Application Laid-Open No. 61-257581, one key information detector is provided for a row of key information groups along the key length direction. In the process of inserting the key into the key insertion hole, the key information is read every time the key information recording part approaches the fixed key information detector. This reading method is practical because the structure of the key information reading device is simplified, but a reading timing pulse is generated when the key information recording part approaches the key information detector, and the key information is generated by the generation timing of this pulse. Must be read. That is, a pulse generating mechanism is required.

A conventional pulse generating mechanism is disclosed in, for example, the above-mentioned JP-A-61-2575.
As described in Japanese Patent Publication No. 81, in a key insertion hole, pairs of light-emitting elements and light-receiving elements that face each other across a space where a key passes are arranged in the same number and at the same interval as the key information recording portion of the key. Each time the tip of the key blocks light from one light-emitting element when the key is inserted, the position of the tip of the key is detected by a change in the output of the light-receiving element facing the light-emitting element. In this case, a read timing pulse for the key information recording portion corresponding to the above is generated.

Further, the pulse generating mechanism according to Japanese Patent Application Laid-Open No. 63-278813
Along a length of the elongated carrier, a plurality of markers, each corresponding to a key information recording portion of the key, are arranged in a row, and a major body which gives a difference in brightness between these markers and the carrier, and A light-emitting element disposed at a relevant position capable of projecting light, and a detector provided at a certain relational position with respect to the light-emitting element and having a light-receiving element for detecting a light-dark difference between the carrier and the marker, Either the measure body or the detector is engaged with the tip of a key inserted into a key insertion hole of the key information reading device to guide the movable body in the length direction of the key and to engage with the key. It is characterized by biasing in the direction to push out, and as you insert the key into the key insertion hole,
Each time the key information recording portion approaches the key information detector, light from the light emitting element enters the light receiving element through the marker, and a read timing pulse is obtained in the form of a change in the light receiving element output signal.

[Problems to be solved by the invention]

Thus, the pulse generation mechanism described in Japanese Patent Application Laid-Open No. 61-257581 requires a large number of pairs of light emitting elements and light receiving elements, so that the structure is inevitably complicated.
There is a problem that a control circuit for processing signals from many light receiving elements is also complicated.

Furthermore, since the light emitting element and the light receiving element are relatively expensive, this is a major factor that increases the cost of a conventional pulse generating mechanism incorporating many of them.

On the other hand, in the pulse generating mechanism according to the above-mentioned Japanese Patent Application Laid-Open No. 63-278813, one marker on the measure body cannot be distinguished from another marker. It is not possible to distinguish between abnormal key operation of returning and inserting the key and normal operation of inserting the key monotonously, so if the key is inadvertently returned during the key insertion and the key is slightly returned, the key is inserted The operation must be restarted from the beginning, or a device for discriminating between a normal operation and an abnormal operation of a key must be incorporated in the key information reading device. In some cases, there is also a security risk of misidentifying a different key as a duplicate key.

The present invention provides a pulse generation mechanism that can generate a necessary number of timing pulses for reading out at least one row of key information groups with at most a few light emitting elements and light receiving elements, and has a simple structure and reliable operation. It is intended to be.

It is another object of the present invention to provide a pulse generation mechanism capable of specifying a key information recording part close to a key information detector every time a timing pulse is generated.

[Means for solving the problem]

In order to achieve the above object, the invention according to claim 1 envisages a plurality of lines each corresponding to a key information recording portion of a key along a length direction of an elongated carrier, and intersecting with the carrier, Assuming a plurality of sub-areas that keep a certain distance from each other along the length direction of each line, each of the plurality of sub-areas in each line is represented by a binary digit representing the ordinal number of the corresponding key information recording part. And, depending on the bit contents of 0 or 1 in each digit, give a light-dark difference between the small area and the carrier, or a major body having the same lightness and darkness as the carrier,
A light-emitting element disposed at a related position capable of projecting light on the measuring body, and a plurality of light-receiving elements disposed at a fixed related position with respect to the light-emitting element and detecting a difference in brightness between a plurality of small sections and a carrier. Having a detector provided, and one of the above-mentioned measuring body and the detector can be moved in the length direction of the measuring body by engaging with the tip of a key inserted into the key insertion hole of the key information reading device. , And urged in a direction to push out the key to be engaged.

The invention according to claim 2 is based on the assumption that a plurality of sets of a pair of small sections each corresponding to a key information recording portion of a key are provided along the length direction of the elongated carrier. The sub-area corresponds to a binary digit of 1 and the other sub-area corresponds to a 2 digit, and depending on the bit content of 0 or 1 of each digit, a difference in brightness between the sub-area and the carrier is given or By setting the signs of the decimal system 1, 2 and 3 respectively according to the set of sub-areas with the same lightness and darkness of the area and the carrier, the signs before and after one sign are different from each other and the same In order that the markers are not continuous, a measure body in which a plurality of markers are arranged along the length direction of the carrier, a light emitting element disposed at a relevant position capable of projecting light on the measure body, and the light emitting element A pair of sensors arranged in a fixed relational position to detect the difference in brightness between the small area and the carrier. A detector having an optical element, as well as identifying each label receives the output signal of the detector,
A determination means for determining the ordinal number of the sign from the number of appearances of the sign and comparison with the preceding and succeeding signs, and one of the major body and the detector is inserted into the key insertion hole of the key information reading device. It is characterized in that it engages with the tip of the key to be inserted and guides it so as to be movable in the length direction of the measure body, and is urged in the direction in which the key to be engaged is pushed out.

(Operation)

In the pulse generating mechanism according to the first and second aspects of the present invention, when the key is inserted into the key insertion hole of the key information reading device, a part of the measure body or the detector is moved to the tip of the key. Abuts and engages with it.

After this engagement, when the key is further pushed in against the urging force of the other party to engage, the detector relatively moves along its length along the measure body.

At the same time, the light from the light emitting element of the detector is projected on the measuring body, passes through the measuring body or is reflected by the measuring body and enters the light receiving element.

At this time, in the pulse generating mechanism of claim 1, since there is an optical difference in brightness between the carrier of the measuring body and the selected small section of the line portion, light from the light emitting element is The output of the light receiving element changes depending on whether the light is projected on the small area or when the light is projected on the selected small area.

On the other hand, the tip of the key is engaged with the measure body or the detector, and the depth of insertion of the key into the key insertion hole and the relative movement amount of the detector and the measure body correspond one to one. Due to the output change of the light receiving element, one line of the measuring body is at a fixed position with respect to the detector, that is, the key information recording portion of the key corresponding to the line is inserted from the entrance of the key insertion hole to a fixed position. Can be detected.

On the other hand, each line has the ordinal number of the corresponding key information recording portion as 2
Since the signals are optically recorded in base notation, by combining output signals of a plurality of light receiving elements respectively corresponding to a plurality of small sections constituting each line, the ordinal number of the key information recording part is converted into a binary signal. Can be read.

Therefore, when the output of the light receiving element group changes due to the small area of the line, if the specifications are set so that the corresponding key information recording portion matches the key information detector facing the key insertion hole, the output of the light receiving element group can be improved. By supplying the signal as a read timing pulse through an OR gate to, for example, a trigger input terminal of a key information detector, the key information can be read at the pulse generation timing. As the read timing pulse, the output signal of the OR gate may be used as it is, or may be shaped by a monostable multivibrator or the like.

At the same time, the output signal binarized from the light receiving element group is made to correspond to the read key information, assuming that the ordinal number of the key information recording portion is directly expressed. In other words, signal processing is performed by pairing the key information recorded in one key information recording part and the ordinal number of the key information recording part. for that reason,
Even if a key is abnormally operated such as returning or inserting the key during insertion of the key into the key insertion hole, the key information group can be correctly read out as long as the key is finally fully inserted.

On the other hand, in the second aspect of the present invention, if the line is read as a marker, the description of the operation of the first aspect of the present invention can be generally applied. However, since the output signals from the pair of light receiving elements of the detector have a 2-bit configuration, the key information recording portions cannot be distinguished as they are.

Therefore, in the invention according to claim 2, a determination device that receives output signals from the pair of light receiving elements is used,
For example, the ordinal number of each marker in a group of markers arranged in a carrier such as 1,2,3,1,2,... The sign before and after is determined based on what kind of sign it is.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a holding block which forms a part of the key information reading device.
Is, for example, an elongated rectangular parallelepiped in the embodiment shown in FIGS.

A key insertion hole 2 is formed in the holding block 1 along the length direction. This key insertion hole 2
As shown in FIG. 1, it is desirable that at least the entrance portion (the left end in FIG. 2) has the same cross-sectional shape as the key 3. This is to prevent the key 3 inserted in the key insertion hole 2 from rattling.

The key 3 as a subject that is inserted into the key insertion hole 2 to read the key information is assumed to be a key of a magnet tumbler lock usually called an electronic lock for simplification of the drawing. As shown in FIGS. 2 and 3, a so-called electronic lock key has, for example, a plurality of key information recording portions (seven portions on one side in the drawing) at an edge of the key body side at regular intervals. A permanent magnet 4 is set in each recording area. In the case of an electronic lock key, the content of the key information in each key information recording portion is determined based on whether or not each permanent magnet 4 is magnetized and the direction of the magnetization, that is, whether the outer end face of the permanent magnet 4 is N-pole. The key information is read by the Hall element 5 (see FIG. 3) as a key information detector because it is a pole.

Incidentally, the content of the key information is the depth of a normal V-shaped notch formed on the edge of the key 3 on the side of the main body, or the content of the key information is formed in a mortar shape formed on the upper surface and / or the lower surface of the main body of the key 3. In the case of the position and depth of the notch, in order to read these key information, measure the vertical movement of the probe urged in the direction that engages the notch or the notch, or measure the depth of the notch. Key information detectors for optically detecting the key information detector are used, but since the configurations of these key information detectors are not the gist of the present invention, further detailed description will be omitted.

On the other hand, in the key insertion hole 2, as shown in FIGS. 2 and 3, a short and elongated measure body 6 whose cross section is, for example, flat and flat is movably fitted in its length direction. . In the invention according to claim 1, this measure body 6
It is configured as described below.

That is, as shown in FIG. 4, the length direction of the rod-shaped carrier 7 as a material of the measuring body 6 (vertical direction in FIG. 4)
Along each line, assuming a plurality of lines 7a, 7a each corresponding to the key information recording portion of the key and intersecting with the carrier 7,
small areas 7b that keep a certain distance from each other along the length direction of a
Assume 7b. In the embodiment shown in FIG. 4, each line 7a is orthogonal to the carrier 7, and each small section 7b is circular.

Then, in each line 7a, the right sub-region 7b corresponds to the 1 digit of the binary number, the central sub-region 7b corresponds to the 10 digit, and the left sub-region corresponds to the 100 digit. 0 or 1 of each digit determined by the ordinal number of the key information recording area
Depending on the bit content, the lightness and darkness of the small area 7b and the carrier 7 are made the same or a light-dark difference is provided between the two. In the illustrated embodiment, as shown in FIGS. 2 and 3, a stepped small hole 8 penetrating the carrier 7 in the thickness direction is opened in the small section 7b where the bit content is 1, and the carrier 7 is removed. By using an opaque material, an optical contrast is provided between the carrier 7 and the small section 7b. In this case, the carrier 7 becomes dark and the small holes 8 become light. Then, as shown in FIG. 3, the ordinal numbers of the key information recording portions 1 to 7 are represented in order from the right side by the combination of the opening positions of the small holes 8, 8.

Each line 7a corresponds to the key information recording portion of the key 3, and the same number of lines 7a, 7a are arranged at the same interval as the interval between the key information recording portions of the key, in the length direction of the carrier, That is, they are arranged in line along the insertion direction of the key 3.

The measure body 6 configured as described above is slidably guided to the upper portion of the key insertion hole 2 having an inverted convex cross section as shown in FIG. 1 in FIGS. 1 and 2. . A compression coil spring is provided in a portion of the key insertion hole 2 having a marginal space by making the cross section thereof an inverted convex shape inward of the measure body 6 (to the right in FIGS. 2 and 3). The return spring 9 is elastically mounted, and the elasticity of the return spring 9 urges the measure body 6 in the direction of the entrance of the key insertion hole 2, that is, in the direction of pushing out the inserted key 3.

On the other hand, as shown in FIGS. 2 and 3, a detector 11 is disposed substantially at the center of the holding block 1. As shown in FIG. 2, the detector 11 is supported by the bottom plate of the holding block 1 and is arranged so that each of the three small sections 7b, 7b in each line of the measuring body 6 can be irradiated from below. And three light emitting elements 12,1 such as light emitting diodes, for example.
2, 12 and a plurality (three) of light receiving elements 13 such as photodiodes for receiving light from the light emitting elements 12 transmitted through the marker 8. Each light receiving element 13 in the illustrated embodiment is fitted in a cup-shaped holder 14 with the light receiving portion facing the bottom surface. One end of a so-called plastic optical fiber 15, for example, which guides light by using total reflection of light, is mounted in a small hole opened in the center of the bottom of each holder. Also, this optical fiber
The other end of 15 is a measure 6 on the ceiling slope of the holding block 1.
Is inserted into a small hole that is opened at a position that can be aligned with each small section 7b in each line.

As shown in FIGS. 2 and 3, the pulse generating mechanism configured as described above causes the tip of the key 3 to hit the outer end face of the measuring body 6 as soon as the key 3 is inserted into the key insertion hole 2. The key 3 and the measure body 6 engage with each other, and the key 3
Is inserted, the measuring body 6 is moved inward by pushing inward against the elasticity of the return spring 9. With the movement of the measuring body 6, the line 7a of the carrier successively passes through the detector 11. When the line 7a is aligned with the detector 11, the line 7a
The light of the light emitting element 12 transmitted through the small hole 8 opened in the small area selected in the above enters the light receiving element 13 (FIG. 2) corresponding to the selected small area through the optical fiber 15. Then, an output is generated at the light receiving element 13. Therefore,
If the output signals of the three light receiving elements 13, 13, 13 are combined,
The key information recording part ordinal as a three-digit binary number can be detected.

Also, the output signals of the light receiving element groups 13 and 13 are supplied to an OR gate (not shown), and the output signal of the OR gate is used as a read timing pulse to generate a key information recording portion 4 as shown in FIG. If the key information detector 5 and the key information detector 5 are matched with each other, the key information can be read at the above-mentioned pulse generation timing. Then, when the key 3 is released, the measure body 6 returns to the original standby position by the elasticity of the return spring 9.

The reason why the small holes 8 are stepped and the light receiving element side is made small in diameter is to shorten the time width of the read timing pulse and to improve the position detection accuracy of the key information recording portion 4.

The light receiving element 13 is not necessarily an optical fiber
Needless to say, it is not necessary to receive the light through the small hole 8 and the light may be directly received.

Furthermore, in the pulse generation mechanism according to the present invention, it is only necessary to distinguish whether the part of the measuring body 6 aligned with the detector 11 is the carrier 7 or the small section 7b of the line. The light and darkness may be reversed from the embodiment, and the carrier 7 may be transparent and the small area 7b may be opaque.

FIG. 5 shows another embodiment of the invention described in claim 1.
In this embodiment, the measure body 6 is configured as a flexible band.

That is, in FIG. 5, reference numeral 16 denotes a leading shoe, and the leading shoe 16 is, for example, a block body having a cross section substantially the same as that of the key insertion hole 2,
It is slidably fitted in the key insertion hole 2.

On the other hand, in FIG. 5, reference numeral 7 denotes a carrier. The carrier 7 is made of an opaque and flexible material, and is formed in an elongated strip shape. The carrier 7 has a key information recording portion 4, 4 of the key 3 perpendicular to the carrier 7 along its length direction.
And the ordinal number of the corresponding key information recording portion 4 is expressed in a binary system by the small holes 8, 8 opened according to the above-mentioned rule for each line. 6 are formed.

One end of the measure body 6 is pulled downward by the elasticity of a return spring 9 as a tension coil spring, and the other end is
After being wound around the first and second pulleys 17 and 18, it is fixed to the lower surface of the leg 16a of the leading shoe 16.

On the other hand, the light emitting element 12
And a slit plate 19 and a light receiving element 13 are provided on the other side, respectively. When the key information recording part 4 and the key information detector 5 are aligned, light from the light emitting element 12 passes through the marker 8 and the slit plate 19. The specifications are set so that the light passes through and enters the light receiving element 13. The light-emitting element 12 can illuminate all three small holes 8, 8 representing three-digit binary numbers in each line on the measure body 6, and the light-receiving element 13 has three light-emitting elements in each line. It is assumed that it has a light receiving unit that separately receives light transmitted through each of the small holes 8, and is configured to be able to take out an output signal independently from each light receiving unit.

In the pulse generating mechanism according to another embodiment configured as described above, when the key 3 is inserted into the key insertion hole, the tip of the key 3 pushes the leading shoe 16 inward, and is pulled by the leading shoe 16. The measuring body 6 moves in its length direction.

Since the operation and effect of the pulse generating mechanism shown in FIG. 5 are the same as those described above, a detailed description is omitted, but the one shown in FIG. 5 can reduce the size of the key information reading device in the key insertion direction. Another advantage arises in that it can be easily incorporated into a thin member such as a door.

The slit plate 19 is for shortening the time width of the output pulse from the light receiving element 13.

Further, for the same reason as described above, the brightness of the carrier 7 and the small area 7b may be reversed.

FIG. 6 shows still another embodiment of the invention according to claim 1, in which the marker 8 is detected by reflected light. That is, a low-reflection surface is formed by painting the upper surface of the carrier 7 in FIG. 6 black, for example, and then the selected small sections 7b, 7b are painted with white paint or the like to form the reflection markers 10, 10. Mark. On the other hand, the light emitting element 12 is connected to the light receiving element 13 or the optical fiber 15 with respect to the measuring body 6.
The light from the light emitting element 12 is disposed on the same side as
The light is projected upward, and the tips of the optical fibers 15 and 15 are slightly lifted from the upper surface of the measuring body 6 so that the light of the light emitting element 12 can enter just below the tip of the optical fiber 15. In FIG. 6, the parts denoted by the same reference numerals as those in FIG. 3 indicate the parts equivalent to those in FIG.

In the embodiment shown in FIG. 6, the point that the measure body 6 moves in the length direction integrally with the key 3 when the key 3 is inserted is the same as the above-described embodiment, but the reflection marker 1 by the light receiving element 13 is used.
Detection of 0 and 10 is performed by reflected light. When the reflective marker 10 in FIG. 6 is a diffusive reflective surface, the tip of the optical fiber 15 or the light receiving element 13 may be simply brought close to the upper surface of the measuring body 6 as shown in FIG. When the reflective marker 10 forms a mirror surface or a reflective surface close to the mirror, as shown in FIG. 7, the light of the light emitting element 12 is narrowed to a narrow beam, and the light emitting element 12 and the light receiving element 13 are angled to see the reflective marker 10. To be the same.

Further, for the same reason as described above, the brightness of the carrier 7 and the small area 7b may be reversed even when the reflection marker 10 is detected by the reflected light.

In each of the illustrated embodiments, the detector 11 is fixed,
Although the measuring body 6 is configured to move together with the key 3, it may be configured such that the measuring body 6 is fixed and the detector 11 is moved in the length direction of the measuring body. Of course (not shown). In this case, there is also a mode in which the light-emitting and light-receiving elements 12, 13 themselves move, and an optical fiber is connected to the light-emitting and light-receiving elements 12, 13;
It is also conceivable that the measure body 6, the light emitting element 12, and the light receiving element 13 remain fixed, and only the tip of the flexible optical fiber moves together with the key.

On the other hand, the configuration of the pulse generating mechanism according to the second aspect of the present invention is substantially the same as that of the first aspect of the present invention, but the configuration of the measuring body 6 is different. That is, the measure body 6 in the invention described in claim 1 is:
Since the ordinal number of the key information recording part is directly converted into a binary number, the major field 6 is used for a key having a large number of key information recording parts.
The number of rows in the upper sub-region also increases, and not only the width of the measuring body 6 increases, but also the number of light receiving elements of the detector must increase.

Therefore, in the pulse generating mechanism according to the second aspect of the present invention, as shown in FIG. 8, a pair of small sections 7b, 7b
Correspond to each of the key information recording portions of the key. In the same manner as described above, the eighth
The small area 7b on the front side of the figure corresponds to the 1 digit of the binary number and the other corresponds to the 10 digit, and when the bit content is "1", the small hole 8 is opened in the small area. Markers 19, 19, each corresponding to a key information recording portion of a key, are arranged on the carrier 7 along its length direction.

As described above, the constructed marker 19 can represent the decimal numbers 1, 2 and 3 except for 0 which is indistinguishable from the ground of the carrier 7 and cannot be read. 20,20 such a sign
Are arranged so that the same marker is not continuous, and the markers before and after one marker are not the same, thereby forming the measure 6. In the embodiment shown in FIG. 8, seven markers 1,2,3,1,2,3,1 are marked from the inner (right) end to the outer end of the measure body 6.

On the other hand, as shown in FIG. 9, the output of the pair of light receiving elements 13, 13 of the detector 11 (see FIG. 2), which is not described above, is incorporated with the determination means of this pulse generating mechanism as shown in FIG. It is supplied to the reading device 21.

The reading device in the illustrated embodiment is a microcomputer. The microcomputer 21 mainly includes a microprocessor (central processing unit) 22, a memory (storage device) 23, and an interface (input / output signal processing circuit).
24, and the light receiving elements 13, 13 of the above detector
Is supplied to the interface 24.

The outputs of these light receiving elements 13 and 13 are connected to an OR gate 25.
The output of the OR gate 25 is shaped by a monostable multivibrator and supplied to the interface 24 as a timing pulse T, and the key information signals from the Hall elements 5 are read at the timing of the generation of the timing pulse T. .

Thus, the microcomputer 21, for example,
It is controlled according to the flowchart shown in FIG. In the figure P ₁ ~
P _X represents the steps of the flowchart.

Next, the operation of the reading device 21 provided with the means for judging the pulse generating mechanism according to claim 2 will be described with reference to FIG.
The control calculation shown in FIG. 10 is executed every time the key 3 is inserted into the key insertion hole 2 (FIGS. 1 and 2) of the holding block.

Then, from the T to the timing pulse occurs first when going pledged key 3, the program is started in step P _1. Here, what obtained by converting the binary number represented by the combination of the outputs of the pair of light receiving elements 13, 13 shown in FIG. 9 to decimal to be referred to as pulse number (hereinafter referred to as PN), first in step P ₂ It is verified whether the PN read out at 1 is 1. As described above, the major body 6 (FIG. 8) has 1,2,3,
This is because it is marked as "...".

If PN is 1, the Hall elements 5, 5 (FIGS. 8 and 9) are generated at the timing when the first timing pulse T is generated.
The key information read by the, as the first data, stored in the storage area M ₁ assigned to the first data in the memory 23. In the same manner, executing step P ₄ to P _7, PN
The key information data corresponding to 2 and 3 is stored in storage areas M ₂ and M
Stored in ₃ respectively. In Steps P ₂ , P ₄ and P ₆ , if the test result is N (No), the test one step before is performed. As a result, even if the key is not monotonously inserted into the key insertion hole, but is returned or inserted in the pulling-out direction, the key information data can be correctly read following the movement.

Then, PN is assayed whether a 1 in step P _8, if PN is 1 to 4 that added the 1 to 3 and data number D, and stores the data in the storage area M _4. In general terms, D is the number of PN tests and T is D / 3
In step PX _-3 , it is determined whether PN is a predetermined T value. Then, the n integer portion of a quotient of D / 3, the data number D and 3n + T in Step P _X-2, and stores the data in the corresponding storage area M _D in step P _X-1. In this case, n indicates the number of appearances of the same PN, and T indicates the front-back relationship. When reading and storing of the key information for the number of data numbers D set in advance are completed, step
The program ends at P _X.

〔The invention's effect〕

As is clear from the above description, the present invention moves the detector relatively along the measuring body and optically detects the difference in brightness between the carrier and the label by the detector. A pulse generating mechanism with a reliable operation can be obtained.

In addition, since each of a plurality of key information storage portions of the key is made to correspond to a line portion or a mark of the measure body, it is necessary to read out at least one row of key information group with at least several light emitting elements and light receiving elements. An appropriate number of timing pulses can be generated, and the configuration of the pulse generation mechanism is significantly simplified. And various other effects.

Further, since the key information storage portion from which the key information is read can be specified each time a timing pulse is generated, the key signal can be read correctly even when the key is abnormally operated. Various effects can be obtained, such as the danger of being eliminated.

[Brief description of the drawings]

FIG. 1 is a diagrammatic front view of a holding block, FIG. 2 is a longitudinal sectional view of a pulse generating mechanism according to an embodiment of the present invention, and FIG. FIG. 4 is a diagrammatic plan view of a carrier for explaining the structure of a measuring body, and FIG. 5 is a perspective view similar to FIG. 3 showing another embodiment of the invention according to claim 1. FIG. 6, FIG. 6 is a perspective view similar to FIG. 3 showing still another embodiment, FIG. 7 is a diagram for explaining an embodiment for detecting a light-dark difference by reflected light, and FIG.
FIG. 9 is a perspective view similar to FIG. 3 showing the main components of the pulse generating mechanism according to an embodiment of the present invention in a developed form, and FIG. 9 is a perspective view of a reading device incorporating the judgment means. FIG. 10 is a block diagram showing the configuration, and FIG. 10 is a flowchart showing a program of the microcomputer. 2 ... key insertion hole, 3 ... key, 4 ... key information recording area, 5
... Key information detector, 6 ... major body, 7 ... carrier, 7a
... line, 7b ... small area, 8 ... small hole, 9 ... return spring, 11 ... detector, 12 ... light emitting element, 13 ... light receiving element,
20 …… Sign.

Claims (2)

(57) [Claims] 1. A plurality of lines each corresponding to a key information recording portion of a key and intersecting with the carrier are assumed along a length direction of the elongated carrier, and are mutually fixed along the length direction of each line. Are assumed, and each of the plurality of small sections in each line is made to correspond to each digit of the binary number representing the ordinal number of the corresponding key information recording portion, and whether each digit is 0 or 1 Depending on the bit content, a light-dark difference is provided between the small area and the carrier, or a measure body having the same lightness and darkness as the carrier, a light-emitting element disposed at a relevant position capable of projecting light on the measure body, and a light-emitting element Having a detector provided with a plurality of light-receiving elements for detecting the difference in brightness between the plurality of sub-areas and the carrier, and one of the above-mentioned measure body and the detector, Insert into the key insertion hole of the key information reader A read timing pulse generating mechanism for a key information reading device, wherein the key timing guide mechanism movably guides the key in the length direction by engaging with the tip of the key, and urges the key in the pushing direction. . 2. A plurality of sets of a pair of small areas each corresponding to a key information recording portion of a key are assumed along a length direction of an elongated carrier, and one of the small areas in each set is represented by a binary number. One digit corresponds to the other sub-region, and the other sub-region corresponds to two digits, and depending on the bit content of 0 or 1 in each digit, a light-dark difference is provided between the sub-region and the carrier, or the light-dark difference between the sub-region and the carrier. Same as
A set of signs representing 10 decimal numbers 1, 2 and 3 is set by each set of sub-areas, and the length of the carrier is set so that the signs before and after one sign are different from each other and the same sign is not continuous. A plurality of markers arranged in a row along the direction, a light emitting element disposed at a relevant position capable of projecting light on the measure body, and a light emitting element disposed at a certain relative position with respect to the light emitting element. A detector having a pair of light receiving elements for detecting the difference in brightness between the area and the carrier, and receiving the output signal of the detector to identify each marker, and to determine the number of appearances of one marker and the markers before and after Judging means for judging the ordinal number of the marker from the comparison, wherein one of the measure body and the detector is engaged with a tip of a key inserted into a key insertion hole of the key information reading device to measure In addition to guiding you to move in the length direction of the body, Reading the timing pulse generation mechanism of the key information reading device being characterized in that biased in a direction to push the key to focus.