JPH0610541A - Key information reading mechanism - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] Read the key depth accurately and stably. [Structure] A lead chip 7 guided so as to be movable in the depth direction is engaged with a key notch, one end is engaged with this lead chip, and data is rotatably supported near this one end. The lever ratio of the plates 8 and 9 magnifies the movement of the lead chip and transmits it to the other end of the data plate. When the lead chip is engaged with the key notch of one depth, the reference line 1 passing through the rotation axis and the fixed point is assumed at the rear end of the data plate, and the distance from the rotation axis is on this reference line. Different from each other, each sub-area is virtualized, and each sub-area is made to correspond to the exponent of each digit of the binary number representing the step depth, and the bit content of 0 or 1 of each digit of the binary number is optically set. The difference between light and dark is converted, and the difference between light and dark is read by a photoelectric conversion device arranged near a fixed point.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key information reading mechanism, and more particularly to a key information reading mechanism capable of reading key information accurately and stably.

[0002]

2. Description of the Related Art Here, the key information means the depth of a V-shaped notch formed on the side edge of the key.

For a key of a pin cylinder lock or a disc cylinder lock, a plurality of and fixed locations on the side edge of the key are defined as key information recording areas, and the key information is provided in each recording area in the form of a V-shaped step depth. It is recorded and the key difference is obtained by making a combination of a plurality of pieces of key information in one key different from other combinations.

When the key is inserted into the key hole of the inner cylinder of the cylinder lock, it is often the case that the key information is read in the form of mechanical contact between each notch and the tumbler, and the unlocking and unlocking control is performed. As is known.

On the other hand, in recent years, regardless of the engagement of the tumbler,
The key information is read by another optical or electrical method, a plurality of pieces of key information for each key are combined and encoded (hereinafter referred to as a key signal), and each of the pre-registered key signal groups is electrically connected. The so-called key information reading device, which controls the electric lock to be unlocked when the read key signal is registered in advance, has been proposed and put into practical use.

If such a key information reading device and an electric lock are installed at a common door of a hotel or an apartment, for example, there is a great advantage that comprehensive building management can be performed without changing the lock of each room. Occurs.

Therefore, the key information reading mechanism in the conventional key information reading device has a side edge of the key in the path of the key in the key information reading device into which the key K is inserted, as shown in FIG. 10, for example. A plurality of (three in the illustrated embodiment) optical fibers 1, 1 are sandwiched so as to sandwich the end surfaces of the optical fibers 1, 1 and a light source (not shown). Each time it reaches the area, the number of optical fibers is examined to check the depth of the key indentation, that is, the key information is read.

At this time, the optical fiber 1,
The end face of No. 1 is arranged in the depth direction of the key indentation (vertical direction in the figure), and four types of key information can be set for the illustrated key, including the fact that no indentation is made. In this case, in the case of the key information that the light is incident on all the three optical fibers 1 and 1 at the deepest notch, and the notch is not entered, the light is incident on all the three optical fibers. do not do.

[0009]

However, in the conventional key information reading mechanism having the above-described structure, the step of key engraving is small, for example, 0.6 to 0.7 mm, and the key insertion is smooth. Since there is a little room in the path of the key, the shadow of the key may not be accurately projected on the end face group of the optical fiber.Therefore, it is necessary to completely prevent the error of reading the key information. There is an inconvenience that you cannot do it.

When the key is worn for a long time and becomes deep or dust is attached to the key, the shadow of the key key is deformed by that amount, so that incorrect key information is read. There is a resentment that there is a possibility that stable key information cannot be expected to be read.

Furthermore, since the diameter of the optical fiber 1 cannot be increased, there are various inconveniences such as a small signal level at the light emitting end of the optical fiber 1.

An object of the present invention is to solve the above-mentioned inconvenience and to provide a key information reading mechanism capable of reading key information accurately and stably.

[0013]

In order to achieve the above-mentioned object, the invention according to claim 1 is movably guided in the depth direction of the key in the vicinity of the entrance of the key hole into which the key is inserted. At least one lead chip whose one end faces the key hole, and rotatably supported in a plane parallel to the key hole, and one end near the rotation axis is engaged with the lead chip, and One end of the data plate is biased toward the keyhole, and the other end of the data plate changes its angular position according to the key notch inserted into the keyhole. A reference line passing through the rotation axis and a fixed point when engaged is assumed, and a plurality of small areas having different distances from the rotation axis are assumed on this reference line, and each of these small areas is represented by a binary number. Corresponds to the power of the digit,
The bit content of 0 or 1 of each digit of the binary number is expressed by the optical difference between the light and shade of each small area, and the depth of the key tick is different from each other.
It is characterized in that a light source and a light-receiving element for detecting the difference in brightness between the small areas are arranged on the movement locus of the small areas in the vicinity of the fixed point in correspondence with each of the base numbers.

According to the second aspect of the invention, near the entrance of the keyhole into which the key is inserted, the key is supported so as to be rotatable in a plane parallel to the keyhole, and one end close to the rotation axis is keyed. At the other end of the data plate, which faces the hole and is biased in the direction in which one end engages with the key notch, and the other end of the data plate whose angular position is changed according to the key notch inserted into the key hole Assuming a reference line that passes through the rotation axis and a fixed point when one end of the plate is engaged in steps of one depth, a plurality of small areas with different distances from the rotation axis are assumed on this reference line. , Each of these sub-areas corresponds to the exponent of each digit of the binary number, and the bit content of 0 or 1 of each digit of the binary number is represented by the optical contrast of each sub-area, Corresponding depths to different binary numbers,
It is characterized in that a light source and a light receiving element for detecting the difference in brightness between the small areas are arranged on the movement locus of the small areas near the fixed point.

[0015]

According to the invention of claim 1, which is configured as described above, the lead chip is constantly urged in the direction in which it is pushed by one end of the data plate and is engaged with the notch of the key inserted into the key hole. Has been done. That is, this lead tip operates similarly to a tumbler for a cylinder lock.

Therefore, the position of the lead chip in the depth direction of the key, that is, the position in the width direction of the key is changed according to the depth of the key insertion into the key hole.

The change in the position of the lead chip is transmitted to the one end of the data plate substantially one-to-one, and the movement of the one end of the data plate is enlarged and transmitted to the other end. Therefore, the angular position of the assumed reference line at the other end of the data plate changes with respect to the fixed point, and the reference line corresponding to the depth of the key notch currently engaged with the lead chip passes through the fixed point.

The reference line can be digitally specified by detecting the difference in brightness between each of the plurality of virtual sub-regions.

According to the second aspect of the present invention, one end of the data plate directly engages with the key notch through the lead chip.

As a result, the depth of the notch of the key is expanded and converted into the rotation of the other end of the data plate, and the reference line corresponding to the notch depth at which one end of the data plate is currently engaged is a fixed point. Since the operation is similar to the operation of the invention described in claim 1, further detailed description will be omitted.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, reference numeral 1 denotes a substrate, and the substrate 1 in the illustrated embodiment has a front end portion (left end portion in FIG. 2) bent into a substantially U-shape, as is apparent from FIG. It is a plate.

As shown in FIGS. 1 to 3, a key guide 2 having a hole (so-called ward) having the same shape as the sectional shape of the stem portion of the key is mounted on the front surface of the bent portion of the substrate 1. There is.

As shown in FIG. 1, behind the key guide 2, there is provided a key rail 3 in which a plate material is bent into a U-shaped cross section and a part thereof is cut out. The key rail 3 is a kind of guide member that serves as a path for the key inserted from the key guide 2.

On the other hand, as shown in FIGS. 1 and 2, in the bent portion having a U-shaped cross section formed in front of the substrate 1, for example, synthetic resin first and second chip rails 4, 5 are provided. Are attached so that they are held.

These first and second chip rails 4, 5
As shown in FIGS. 4 and 5, each of the guide members is formed symmetrically and has a guide slit 6 with one end open, and each of the guide slits 6 has an opening end sandwiching a key hole. So that they are opposed to each other, they are arranged at a relational position so as to be perpendicular to the key rail 3.

Lead chips 7 are housed in the guide slits 6, 6 of the first and second chip rails 4, 5 so as to be slidable in the longitudinal direction.

As shown in FIGS. 6 and 7, the lead chip 7 is an elongated plate-like member having a narrowed engaging end (left end in the figure) with the key notch, and the central portion is cut and raised to one side. To form an engagement piece 7a. The engaging piece 7a is provided with a notch portion 4a formed in the first and second chip rails 4 and 5.
It projects rearward from 5a (see FIGS. 4 and 5) (see FIG. 1).

On the other hand, behind the first and second chip rails 4 and 5, the first and second data plates 8 and 9, respectively.
Is provided. The key information reading device in the illustrated embodiment is configured to read the key information of a key having notches formed on both side edges of the key, so that one key is read on each side of the key rail 3. Although two data plates are used, it is needless to say that only one data plate needs to be provided on one side of the key rail 3 in the case of a key which is formed on only one side such as a key of a pin cylinder lock.

Each data plate 8 (9) is an elongated lever in its overall shape, and is rotatably supported near one end (upper end in FIG. 1).

Then, one end of each data plate is urged in the direction close to the key hole, that is, the key rail 3 by the elastic force of the chip spring 11 as a torsion coil spring wound around the rotary shaft.

Further, as shown in FIG. 1, one end of each data plate 8 (9) is engaged with an engaging piece 7a (see FIGS. 6 and 7) of the lead chip. Therefore, the biasing force of the data plate biases each lead chip 7 in the direction approaching the key hole.

With the above structure, when the key is inserted through the key hole, each lead chip 7 moves along the lengthwise direction of the key so as to trace the shape of the side edge of the key. And in the process engages the bottom of each notch.
The timing for engaging the bottom portion can be obtained by the timing mechanism described later.

As described above, the lead tip 7 moves in the depth direction of the key notch due to the engagement between the engaging end of the lead tip 7 and the key notch. As is clear from FIG. 1, it is transmitted to one end of the data plate 8 (9) in a substantially one-to-one manner, further enlarged by the lever ratio, and transmitted to the other end of the data plate. In short, even if the lead chip 7 moves a little, the data plate moves a lot.

At the other end of the data plate 8 (9), a device for detecting the depth of the key cut is provided.

Therefore, as shown in FIG. 8, for example, a substantially S-shaped detection hole 12 is opened at the rear end of the first data plate 8 (see FIG. 1). The shape of the detection hole 12 is set according to the following rule.

That is, at point 8, the point O is the rotation axis of the first data plate 8 and the point P is the fixed point on the substrate 1. In the illustrated embodiment, this point P is the center of the light emitting diode 13 (see FIG. 2) provided on the substrate 1 on the movement locus of the rear end of the first data plate 8.

When the engaging end of the lead chip 7 is engaged in steps of one depth, a first reference line l1 passing through the rotary axis O and the fixed point P is assumed. As described above, in the illustrated embodiment, since the key indentation is set in four steps including the key information that no indentation is made, four reference lines 1 can be considered. Speaking of Fig. 8, l1
Corresponds to the key information that no key ticks are inserted (see FIG. 1), similarly l2 corresponds to the shallowest tick, and similarly l4 corresponds to the deepest tick.

Next, in each reference line l, a plurality of (two in FIG. 8) small areas S1 and S2 are arranged at different distances from the rotation axis O.
Virtualize. Then, the small areas S1 and S2 are made to correspond to the exponents 0 and 1 of the two-digit binary number, respectively.

Then, on each reference line l, a set S of small areas
The bit content of 0 or 1 of each digit of the binary number represented by 1 and S2 is represented by providing a light and dark difference in the small area S. Figure 8
In the case of 1
The bit contents of are represented. Then, the binary numbers indicated by the reference lines l1 and l2 in FIG. 8 are [00], [01], [11], and [10], respectively.

The above-mentioned binary number naturally distinguishes the key indentation depth digitally, but since this binary number is read, as shown in FIGS. 2 and 9, the data plate 8 is used.
Regarding the small area S on the side opposite to the light emitting diode 13
The incident end of the optical fiber 14 is made to face the movement locus of each corresponding to each small area S. The optical fibers 14 and 14 are attached to the lid 15 (see FIG. 2 and FIG. 9).

The light emitting ends of the optical fibers 14 are made to face the light receiving surfaces of the corresponding photoelectric conversion elements,
The presence of the opening at the other end of the data plate 8 is detected by the generation of the output signal of this photoelectric conversion element. In the embodiment shown in FIG. 8, the 2-bit output signal from the photoelectric conversion element has no correlation with the order of the key step depth, and therefore this output signal is supplied to the decoder to determine an arbitrary value. It is better to convert it to a code.

The opening at the other end of the data plate 8 shown in FIGS. 1 and 8 is substantially S-shaped, but for convenience of processing, this connects the small areas S, S set to be opened. As a result, the shape of the opening is not the gist of the present invention.

In relation to this, if the opening of the small area S is made slightly larger in the circumferential direction (left and right direction in FIG. 8), even if the notch of the key inserted into the key hole wears due to aged use. Alternatively, even if dust or the like is attached to the cut, the depth of the cut can be accurately detected.

Further, in the illustrated embodiment, an optical contrast is obtained by punching a selected small area S. In other words, the bit content depends on whether the light of the light emitting diode 13 is transmitted through the data plate 8. I am trying to detect
In this case, the reflectance of the selected sub-area S may be different from that of the ground or other sub-areas S, and the difference in the reflectance may be used to obtain the optical contrast. At this time, it goes without saying that the light source and the light receiving element should be arranged on the same side with respect to the data plate.

1 and 2, reference numeral 16 indicates a timing plate. This timing plate 16
In the process of inserting the key into the key hole, detects the timing at which the notch of the key aligns with the lead chip 7, but this is not the gist of the present invention and will be briefly described below.

The timing plate 16 is a plate-shaped body having a substantially fan-shaped outer shape, and a main portion of the timing plate 16 is rotatably supported on the substrate 1. The timing plate 16 is elastically supported by the plate spring 17 as a torsion coil spring. Is biased counterclockwise at.

Further, a perforation group indicating the angular position of the timing plate 16 is opened at the free end portion of the timing plate 16 as in the data plate 8 (9). The law of aperture of this group of perforations is similar to that of the data plate.

When the key is inserted into the key hole, the tip of the key engages with the upper end of the timing plate 16 in FIG. 1 through the timing block 18, and the plate spring is further inserted by further insertion of the key. The timing plate 16 rotates clockwise against the elasticity of 17.

When the key indentation is aligned with the lead chip 7, the corresponding reference line of the perforation group is aligned with the optical fibers 14 and 14 for timing measurement, and the position of the indentation depends on the opening mode of the perforation portion. It is detected whether it is aligned with the lead chip 7.

The timing plate 16 shown in FIG.
There are only three types of perforations above, and these three types of perforations are repeated. In this case, by counting the number of times one aspect of perforation appears,
It is possible to specify the formation position of the key notch at three or more places.

According to the invention described in claim 1 described above, the depth of the key notch is determined by the data plate 8 through the lead chip 7.
It is configured to be transmitted to (9). At this time, the lead chip 7 accurately moves linearly in the depth direction of the key cut, that is, in the horizontal direction in FIG.

However, in principle, one end of the data plate 8 (9) can be directly engaged with the key notch, and such an arrangement is the invention according to claim 2 (Fig. (Not shown). In the invention according to claim 2, one end of the data plate engaging with the key notch moves not along a straight line but along an arc, but this does not hinder the operation of the invention. .

[0054]

As is apparent from the above description, in the invention described in claim 1, the depth of the key cut, that is, the key information is passed through the lead chip, and in the invention described in claim 2, the invention is directly performed. In addition, since the rotation angle of each data plate is converted and the rotation angle is read optically and digitally, the intended effect of accurately and stably reading the key information is achieved. be able to.

[Brief description of drawings]

FIG. 1 is a plan view showing a key information reading device equipped with a key information reading mechanism according to the first aspect of the invention, with a lid body removed.

FIG. 2 is a sectional view of a key information reading device.

FIG. 3 is a front view of the key information reading device.

FIG. 4 is an external perspective view of a first chip rail.

FIG. 5 is an external perspective view of a second chip rail.

FIG. 6 is a side view of the lead chip.

FIG. 7 is a vertical sectional view of a lead chip.

FIG. 8 is a partially enlarged plan view of the first data plate.

FIG. 9 is a plan view of the key information reading device.

FIG. 10 is a diagram showing the principle of a conventional key information reading mechanism.

[Explanation of symbols]

 7 Lead Chip 7a Engagement Piece 8 First Data Plate 9 Second Data Plate 11 Chip Spring 12 Detection Hole 13 Light Emitting Diode 14 Optical Fiber l Reference Line s Small Area

Claims (2)

[Claims] 1. At least one lead chip, which is guided movably in the depth direction of the key in the vicinity of the entrance of the key hole into which the key is inserted and has one end facing the key hole, and the key hole. It is rotatably supported in parallel planes, one end near the rotation axis is engaged with the lead chip, and the other end is inserted into the key hole and the data plate biased toward the key hole. At the other end of the data plate that changes the angular position according to the key step, the reference line passing through the rotation axis and the fixed point is assumed when the lead tip is engaged in the step of one depth. Imagine a plurality of small areas on the reference line that differ in distance from the rotation axis, and define each of these small areas as 2
In addition to corresponding to the power of each digit of the binary number, the bit content of 0 or 1 of each digit of the binary number is represented by the optical contrast of each small area, and the depth of the key indentation is different. A key information reading mechanism corresponding to each of the above, wherein a light source and a light receiving element for detecting a difference in brightness between the small areas are arranged on a movement locus of the small areas near the fixed point. 2. In the vicinity of the entrance of the keyhole into which the key is inserted, the key is rotatably supported in a plane parallel to the keyhole,
One end near the rotation axis is exposed to the key hole, and the angular position is changed according to the data plate urged in the direction in which this one end engages with the key hole and the key hole inserted into the key hole. At the other end of the data plate, when one end of the data plate is engaged in steps of one depth, a reference line passing through the rotation axis and a fixed point is assumed, and the distance from the rotation axis on this reference line is assumed. A plurality of different sub-areas are hypothesized, each of these sub-areas is made to correspond to a power of each digit of the binary number, and 0 or 1 bit content of each digit of the binary number is optically shaded in each sub-area. Represented by a difference, the depth of the key indentation is made to correspond to each of different binary numbers, and a light source and a light receiving element for detecting the difference between light and shade of the small area are arranged on the movement locus of the small area near the fixed point. Key information reading mechanism characterized by.