JPH084562Y2 - Key information read mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a key information reading mechanism (hereinafter simply referred to as a reading mechanism) of a key information reading device in a so-called reverse master key device, and particularly, to a depth of a key depression. The present invention relates to a read-out mechanism that can detect key information.

[Conventional technology]

The reverse master key device is a kind of electric lock that can be unlocked by a plurality of different cylinder lock keys.For example, if it is installed at a common door such as the entrance of a hotel or a so-called condominium, Residents can unlock the common door using the key of the room or room they are staying in, but things that do not have the key cannot enter the building, which not only improves security. There is a big advantage that comprehensive building management becomes possible.

The reverse master key device is usually provided with a key information reading device, and is embedded in, for example, a V-shaped notch formed on the side edge of the key or a side edge of the key of a so-called electronic lock. Key information such as the polarity of a permanent magnet or the presence or absence of magnetization is read by an optical or electrical method, and a plurality of key information for each key is combined and encoded (hereinafter referred to as a key signal).
Is electrically collated with each of the pre-registered key signal groups, and the electric lock is unlocked when the read key signal is the pre-registered one.

Then, when the key information is the depth of the notch formed on the side edge of the key, for example, as described in JP-A-64-71977 or JP-A-1-102185, By arranging a light emitting element on one side and a plurality of light receiving elements on the other side so as to sandwich the side edge portion of the key, and making each light receiving element correspond to the depth of the key cut, a light receiving element group The key information can be detected in the form of a combination of the output signals of. Further, the key information of a so-called electronic lock key can be read by bringing a magnetic detection element such as a hall element close to the side edge of the key and examining the output signal thereof.

[Problems to be solved by the device]

However, there are locks that record the key information as a stepwise set depth of a mortar-shaped depression in a small number, but a key information reading mechanism for the lock key has not been proposed yet.

It is an object of the present invention to provide a reading mechanism capable of detecting key information as the depth of a depression.

[Means for solving the problem]

In order to achieve the above object, the plan of claim 1 is
A guide tube connected substantially vertically to the key insertion hole of the key information reading device, and one end of the guide tube that is movably guided in the guide tube in the length direction of the guide tube and that engages with a recess formed in the key. A probe urged in the insertion hole direction, a light emitting element disposed so as to face the inside of the guide cylinder near the other end of the probe, and a guide on the opposite side of the probe with respect to the light emitting element. The inner surface of the cylinder is provided with a plurality of optical fibers, one end of which faces the guide cylinder and the other end of which faces different photoelectric elements, and each optical fiber is associated with different depths of the key depression. At the same time, when the position of one end of each optical fiber in the length direction of the guide tube is aligned with the recess of the corresponding depth of the probe, the other end of the probe covers one end of the optical fiber. Is set to .

Further, the invention according to claim 2 is such that the guide tube is connected substantially vertically to the key insertion hole of the key information reading device, and the guide tube is movably guided in the length direction of the guide tube, and is guided to the key. A probe whose one end that engages with the formed recess is urged in the direction of the key insertion hole, a light emitting element that is disposed near the other end of the probe so as to face the inside of the guide tube, and a probe. On the inner surface of the guide cylinder on the side opposite to the light emitting element with respect to the tentacle, one end is exposed to the inside of the guide cylinder and the other end is exposed to the same photoelectric element, and a plurality of optical fibers are provided, and each optical fiber is a key. The optical fiber is made to correspond to different depths of the probe, and when the position of one end of each optical fiber in the length direction of the guide tube is aligned with the recess of the corresponding depth, The end covers one end of the optical fiber. Characterized by being configured.

[Action]

The reading mechanism according to the present invention configured as described above has a key stem portion in which mortar-shaped depressions are arranged in a row along the length direction in the key insertion hole of the key information reading device. By advancing this into the inside of the key insertion hole, the relative movement between one end of the probe and the recess is caused, thereby causing the probe to scan the key stem portion. Since the probe is urged in the direction toward the stem of the key, one end of the probe traces the cross-sectional shape of the key stem by the cutting plane including the scanning line and the probe.

When one end of the probe is aligned with the recess, that is, when the probe is engaged with the deepest part of the recess, the other end of the probe is
The optical fiber is located at a position that covers one end of the optical fiber corresponding to the depth of the depression and blocks the light from the light emitting element that is going to enter the optical fiber. Therefore, there is no output signal in the photoelectric element at the other end of the optical fiber, but there is an output signal because light is incident on the photoelectric element corresponding to the shallow depression. Therefore, the position of the other end of the probe, that is, the key information as the depth of the recess can be detected by examining the output signal of the photoelectric element group when one end of the probe matches the recess.

The operation of the mechanical member of the read-out mechanism according to the second aspect is similar to that of the read-out mechanism according to the first aspect. The difference is that the other ends of the plurality of optical fibers are exposed to one photoelectric element, so that when one end of the probe is aligned with the key recess, the depth of the recess causes the other probe The number of optical fibers covered by one end varies. Therefore, the output signal of the photoelectric element changes quantitatively, and if the output signal of the photoelectric element as this analog signal is tested, the position of the other end of the probe, that is, the key information as the depth of the depression is detected. be able to.

〔Example〕

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

1 to 3, reference numeral 1 indicates a main body block of the key information reading device, and the elongated main body block 1 includes
A key insertion hole 3 into which the stem portion of the key 2 is inserted is formed along the length direction. By the way, the key 2 in the illustrated embodiment has a black circle (second
Fig.) Is used as a key information recording portion, and a so-called electronic lock permanent magnet is embedded therein, and a black circle portion (Fig. 1) in a ridge 4 having a trapezoidal cross section formed on the upper surface of the stem is used as a key information recording portion. It is a so-called compound key in which mortar-shaped depressions (not shown) having different depths are formed. Needless to say, the reading mechanism according to the present invention reads the key information as the depth of the depression in the latter ridge 4. is there.

A guide cylinder 5 is connected almost vertically near the entrance of the key insertion hole 3, and a probe 6 is arranged in the guide cylinder 5 in the longitudinal direction of the guide cylinder 5 (see FIGS. 2 and 3). It is guided so that it can move up and down. The probe 6 in the illustrated embodiment is a rod-shaped body in which a flange portion is formed in the central portion, one end (lower end in the drawing) is formed into a substantially conical shape, and the other end is made large in diameter. Due to the resilience of the probe spring 7 as a compression coil spring, which is elastically mounted on the member 5, the probe 6 is urged downward in FIGS. 2 and 3, that is, one end of the probe 6 is urged toward the key insertion hole 3. There is.

On the other hand, as shown in FIG. 3, a light emitting element 8 such as a light emitting diode is disposed in the portion of the guide cylinder 5 near the other end of the probe 6 so as to face the inside of the guide cylinder 5.

Further, one end of the plurality of optical fibers 11, 11 is arranged so as to face the inside of the guide tube 5 via the holding plug 9 in the portion of the guide tube on the opposite side of the probe 6 from the light emitting element 8. ing. The other end of each optical fiber 11 faces the light receiving surface of a different photoelectric element 10 in the reading mechanism according to the first aspect of the invention, as shown in FIG. In the read-out mechanism according to the invention described in (1), as shown in FIG. 5, they face the light-receiving surface of the same photoelectric element 10.

Each optical fiber 11 is an optical line that uses total reflection of light to transmit light in the lengthwise direction while confining the light inside, and its diameter is 0.5 to 0.7 which is a step difference in the depth of the key depression.
The preferred range is mm (millimeter). Further, each optical fiber 11 corresponds to each different depth of the key depression, and the position of one end of each optical fiber 11 in the length direction of the guide tube 5 corresponds to one end of the probe. The other end of the probe 6 is set so as to cover one end of the optical fiber and block the light from the light emitting element when aligned with the depression of the depth.

In the illustrated embodiment, the depths of the four-step depressions are configured to be detected by the three optical fibers.
That is, as shown in FIG. 6, when the other end of the probe 6 is at the position A, that is, the three optical fibers 1
When the light is incident on all of the light emitting elements 8 from the light emitting element 8, it corresponds to the state in which the probe is engaged with the deepest dent, and the other end surface of the probe 6 is changed every time the dent becomes one step shallower. It is set to ascend to positions B, C and D. In the illustrated embodiment, the diameter of the optical fiber 11 is set to about 0.5 to 0.7 mm, which is about the same as the step difference in the depth of the depression.
Holding plug 9 into which one end of optical fiber 11 is inserted
As shown in FIG. 6, these holes are lined up along a line diagonally intersecting with the vertical line in order to prevent the partition wall between one hole and the other adjacent hole on the inner end face of the, from breaking. Has been done.

On the other hand, as shown in FIGS. 1 and 2, the main body block 1 is equipped with a timing pulse generation mechanism 12 for setting the timing for reading the key information.

The timing pulse generating mechanism 12 in the illustrated embodiment has an elongated measuring body 13, which is accommodated in the key insertion hole 3 while being guided so as to be movable in the longitudinal direction.
Further, a plurality of small holes respectively corresponding to the key information recording portion are opened along the length direction. Furthermore, the elastic force of the return spring 14 as a compression coil spring biases the key 2 in the leftward direction in FIG. 1 and FIG. Then, the main body block 1 has a second
As shown in the figure, the timing pulse light-emitting element 15 is disposed below the measuring body 13 and one end of the timing pulse optical fiber 16 is disposed above the other end of the timing pulse optical fiber 16. It faces the light receiving portion of the timing pulse photoelectric element (not shown). 1 and 3, reference numeral 17 indicates a Hall element for detecting magnetism, and the output signal of this Hall element 17 is the optical fiber 1 connected to the guide tube 5.
It is supplied to a key signal processing circuit (not shown) together with the output signals of the photoelectric element groups received from 1,11.

In the key information reading device configured as described above, as soon as the key 2 is inserted into the key insertion hole 3, the tip of the stem portion comes into contact with the measure body 13, and thereafter, when the key 2 enters, the measure body is moved.
13 moves to the right in FIG. 2 against the elasticity of the return spring 14. In the process of this movement, the small holes of the measure body 13 are successively aligned with one end of the timing pulse optical fiber 16, at which time the light of the timing pulse light emitting element 15 is transmitted through the measure body 13 and the timing pulse optical fiber is transmitted. The light enters the photoelectric element for timing pulse through 16. At this time, a timing pulse is generated as an output signal of the timing pulse photoelectric element, and the hall element 17 is aligned with the permanent magnet embedded in the key 2 and one end of the probe 6 is aligned with the recess of the ridge 4. However, in the illustrated embodiment, since the probe 6 is aligned with the first depression when the fourth timing pulse is generated after the key 2 is inserted, the probe 3 is set before that.
It is desirable not to read the key information as the depth of the depression when each timing pulse is generated.

When one end of the probe 6 is aligned with the mortar-shaped recess,
The key information as the depth of the depression is converted into the position of the other end of the probe 6 in the length direction of the guide tube 5, and the photoelectric element is provided in the form of the incidence of light on the plurality of optical fibers 11, 11. Is read as described above.

It should be noted that the present invention is not limited to the above-described embodiments, but can be modified in various ways.

For example, in the illustrated embodiment, three optical fibers are used to detect the depth of the depression in four steps (see FIG. 6), but this is achieved by adding another set of optical fiber 11 and photoelectric element. , When the other end surface of the probe 6 is at the position A in FIG.
If one end of 11 is covered, one end of the probe is engaged with the deepest recess, so that the key 2 is inserted into the key insertion hole 3 when the other end surface is in the position of FIG. 4A. Therefore, there is another advantage that it can be distinguished from the case where the other end surface of the probe is located below the position shown in FIG. 4A.

[Effects of the Invention] As is clear from the above description, the present invention detects the depth of the key depression with one end of the probe to convert it into the position of the other end, and A light emitting element and a plurality of optical fibers are arranged in between, and the positions of the light incident end faces of the optical fiber groups in the probe moving direction are mutually different, and the position of the other end of the probe is set to the optical fiber group. Since the light is detected in the form of incidence and blocking, there is an effect that the key information as the depth of the key depression can be reliably read.

[Brief description of drawings]

FIG. 1 is a plan view showing a key information reading device equipped with a reading mechanism according to an embodiment of the present invention with some members removed, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a sectional view of the reading mechanism. ,
FIG. 4 is a diagram showing a connection mode between an optical fiber group and a photoelectric element in the read-out mechanism according to the first aspect of the present invention, and FIG. 5 is an optical fiber group in the read-out mechanism according to the second aspect of the invention. FIG. 6 is an enlarged inner end view of the holding plug, showing a mode of connection with the photoelectric element. 2 ... key, 3 ... key insertion hole, 5 ... guide tube, 6 ... probe, 7 ...
Probe spring, 8 ... Light emitting element, 10 ... Photoelectric element, 11 ... Optical fiber.

Claims (2)

[Scope of utility model registration request] 1. A guide tube connected substantially vertically to a key insertion hole of a key information reading device, and a recess formed in the key that is guided in the guide tube so as to be movable in the longitudinal direction of the guide tube. A probe whose one end is biased in the direction of the key insertion hole, a light-emitting element arranged so as to face the inside of the guide cylinder near the other end of the probe, and a light-emitting element with respect to the probe. Has a plurality of optical fibers with one end facing the inside of the guide cylinder and the other end facing a different photoelectric element on the inner surface of the guide cylinder on the opposite side, and each optical fiber has a different depth of the key depression. And the position of one end of each optical fiber in the length direction of the guide tube is aligned with the recess of the corresponding depth at one end of the probe, the other end of the probe is Set to cover one end of Key information reading mechanism according to claim. 2. A guide tube connected substantially vertically to a key insertion hole of a key information reading device, and a recess formed in the key guided in the guide tube so as to be movable in the longitudinal direction of the guide tube. A probe whose one end is biased in the direction of the key insertion hole, a light-emitting element arranged so as to face the inside of the guide cylinder near the other end of the probe, and a light-emitting element with respect to the probe. Is provided with a plurality of optical fibers with one end facing the inside of the guide cylinder and the other end facing the same photoelectric element on the inner surface of the guide cylinder on the opposite side, and each optical fiber has a different depth of the key depression. In addition to making them correspond to each other, when the position in the length direction of the guide tube at one end of each optical fiber is aligned with the depression of the corresponding depth at one end of the probe, the other end of the probe becomes Set to cover one end Key information reading mechanism according to claim.