JP2000346609A - Finger unevenness information input device - Google Patents

Abstract

(57) Abstract: A finger is uniformly pressed into contact with each electrode of a first electrode group to reduce variation in finger unevenness information. An electrode in which a printed circuit board (12) is fixed on a base (11), and a plurality of linear output electrodes (14) long in a direction perpendicular to the longitudinal direction of a finger (13) are arranged on the printed circuit board at a predetermined pitch. The array 15 is formed, and the input electrodes 16 are formed outside the electrode array 15. A support member 17 is erected on the tip of the base on the tip side of the finger, and a pressing member 18 is rotatably supported on the top end of the support member. Then, with the finger placed on the printed circuit board, the abdomen including the first joint and the second joint of the finger is pressed by pressing the rotating end of the pressing member with the finger of the other hand. The array and input electrodes are evenly pressed into contact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a finger unevenness information input device which detects unevenness characteristics such as wrinkles and streaks existing on a finger and which is applied to, for example, personal authentication.

[0002]

2. Description of the Related Art As a system for identifying an individual, for example, a biometric system, that is, a system called an ecological authentication system is known. This is a personal authentication technique using the physical characteristics of an individual, and is identified by fingerprints, finger joint wrinkles, iris, retina, ears, face, voice, and the like.

For example, Japanese Patent Application Laid-Open No. H10-26088 discloses a method for performing personal authentication based on wrinkles of a finger joint. As shown in FIG. 15, a plurality of linear output electrodes 2 which are long in a direction orthogonal to the longitudinal direction of the finger 1 to be verified of the person to be verified are arranged at predetermined intervals along the longitudinal direction of the finger 1. A linear electrode array 3 is provided, and a single input electrode 4 having a finger whose width in the longitudinal direction is wider than the output electrode 2 is provided at an end of the linear electrode array 3 along the longitudinal direction of the finger 1.
It has.

[0004] Each switch of the analog switch group 5 is connected to each output electrode 2, and each switch is sequentially turned on and off by a timing pulse from a timing pulse generator 6, and the finger 1 is moved to the linear electrode array. The oscillator 7 supplies an oscillation frequency signal of, for example, 1 MHz from the oscillator 7 to each output electrode 2 via each switch of the analog switch group 5 while being in contact with each output electrode 2 and input electrode 4 of the input electrode 3. The voltage signal from 4 is detected by a detection circuit 8
The A / D converter 9 converts the signal into a digital signal and outputs the digital signal.

In this configuration, the first joint and the second joint are connected to each other of the linear electrode array 3 with the vicinity of the third joint of the finger 1 in contact with the input electrode 4 as shown in FIG. The contact is made on the output electrode 2. In this case,
In the part where the finger 1 and the output electrode 2 are in close contact with each other as in the part (a), the capacitive coupling between the finger 1 and the output electrode 2 becomes strong,
Since the impedance becomes small, the value of the signal V (i) in that part becomes large. Conversely, the finger 1 and the output electrode 2 are not in close contact with each other, such as the side wrinkles near the first joint in the figure (b) and the side wrinkles near the second joint in the figures (c1) and (c2) in the figures. In the portion, the capacitive coupling between the finger 1 and the output electrode 2 is weakened, and the impedance is increased, so that the value of the signal V (i) in the portion is reduced. In this manner, finger unevenness information can be obtained. Then, by comparing and comparing the detected unevenness information with the previously registered unevenness information of the individual, personal authentication as to whether or not the user is an individual can be performed.

[0006]

However, since the act of bringing the vicinity of the base of the finger 1 into contact with the input electrode 4 is not routinely performed, the entire ventral side of the finger including the vicinity of the base of the finger is input. There is a problem that it is difficult to uniformly press the electrode 4 and the linear electrode array 3 on the electrode 4 and the linear electrode array 3, and there is a large variation between persons. In particular, there is a person who cannot smoothly press the vicinity of the second joint against the linear electrode array 3, and in such a case, there is a problem that the contact range changes every time a finger contacts the electrode. In addition, when a person with a short finger is brought into contact with the finger so that the second joint is within the effective range of the linear electrode array, the input electrode is located near the third joint at the base of the finger, and the finger is pressed correctly. There was a problem that it became difficult.

Therefore, according to the invention described in each of the claims, the finger is pressed into contact with each electrode of the first electrode group using a pressing member, so that the finger is uniformly contacted with each electrode of the first electrode group. Provided is a finger unevenness information input device that can be pressed and can input finger unevenness information with reduced variation.

Further, the invention according to claim 2 further provides a finger unevenness information input device which can easily position the vicinity of the second joint of the finger at the pressing force applying position. Also,
The invention according to claims 3 and 5 further comprises a
The present invention provides a finger unevenness information input device capable of easily and reliably making contact with an electrode. The invention according to claim 4 further includes:
Provided is a finger unevenness information input device capable of easily positioning a finger.

Further, the invention according to claim 6 further provides a finger unevenness information input device in which a person with a long finger and a person with a short finger can surely press and contact the electrode with the electrode. The invention according to claim 7 further provides a finger unevenness information input device that can easily perform an operation of applying a pressing force to a finger. Further, the invention according to claim 8 further provides a finger unevenness information input device capable of smoother pressing contact of the finger with the first electrode group.

[0010]

According to the first aspect of the present invention,
A first electrode group in which a plurality of electrodes are arranged at predetermined intervals along the longitudinal direction of the subject's finger, and a second electrode which is in contact with the first electrode group when the finger comes into contact with the first electrode group. A driving means for supplying an electric signal to one of the electrodes of the first electrode group and one of the second electrodes while a finger is in contact with the first electrode group and the second electrode; The means includes a detecting means for detecting an electric signal from the other electrode to which no electric signal is supplied, and a pressing member for applying a pressing force to the finger to press and contact at least the first electrode group. According to a second aspect of the present invention, in the finger unevenness information input device according to the first aspect, a reference mark is provided at a pressing force application position of the pressing member.

According to a third aspect of the present invention, there is provided a first electrode group in which a plurality of electrodes are arranged at predetermined intervals along the longitudinal direction of a finger of a person to be measured, and a finger is placed on the first electrode group. A pressing member that applies a pressing force to the finger to the pressing contact, a second electrode that is provided on the pressing member, and presses and contacts the finger when the pressing member applies a pressing force to the finger; and a first electrode group. Driving means for supplying an electric signal to one of the electrodes of the first electrode group and one of the second electrodes while the finger is in contact with the second electrode; and the other electrode to which the driving means does not supply an electric signal. And a detecting means for detecting an electric signal from the electronic device.

According to a fourth aspect of the present invention, there is provided a first electrode group in which a plurality of electrodes are arranged at predetermined intervals along a longitudinal direction of a finger of a person to be measured, and a finger is placed on the first electrode group. When the finger is brought into contact with the second electrode, which is simultaneously in contact with the first electrode group and the second electrode while the finger is in contact with the first electrode group and the second electrode, Driving means for supplying an electric signal, detecting means for detecting an electric signal from the other electrode to which the driving means does not supply an electric signal, and applying a pressing force for pressing the finger to at least the first electrode group. There is provided a pressing member and a regulating member that regulates the tip position of the finger while the finger is in contact with the first electrode group.

According to a fifth aspect of the present invention, there is provided a first electrode group in which a plurality of electrodes are arranged at predetermined intervals along a longitudinal direction of a finger of a person to be measured, and a finger is placed on the first electrode group. A regulating member that regulates the position of the tip of the finger in the contacted state, a second electrode provided on the regulating member, the tip of which is in contact with the finger, and a first electrode.
While the finger is in contact with the electrode group of
A driving unit for supplying an electric signal to one of the electrodes and the second electrode of the electrode group, a detecting unit for detecting an electric signal from the other electrode to which the driving unit does not supply an electric signal, and at least a first electrode And a pressing member that applies a pressing force to the group to press the finger against the group.

According to a sixth aspect of the present invention, in the finger unevenness information input device according to the fourth or fifth aspect, at least one or both of the first electrode group and the regulating member are movably arranged in the longitudinal direction of the finger. It is in. The invention according to claim 7 is
The finger unevenness information input device according to any one of claims 1 to 6, wherein the pressing member applies a pressing force by a spring force. The invention according to claim 8 is the invention according to claims 1 to 7
In the finger unevenness information input device according to any one of the above, a flexible member is arranged on a side where the first electrode group is arranged.

[0015]

Embodiments of the present invention will be described with reference to the drawings. (First Embodiment) FIG. 1 is a view showing a configuration of a sensor section in which electrodes are arranged, and a printed circuit board 12 is mounted on a base 11.
Is fixed. The printed circuit board 12 includes a finger 13
An electrode array 15 is formed as a first electrode group in which a plurality of linear output electrodes 14 that are long in a direction orthogonal to the longitudinal direction of the electrode array are arranged at a predetermined pitch. An input electrode 16 as a second electrode is formed outside one end of the
3 and is fixed on the base 11.

A support member 17 is erected at the tip of the base 11 on the tip side of the finger 13, and a pressing member 18 is rotatably supported on the top end of the support member 17. The pressing member 18 has a length such that the end on the rotating side is located near the second joint of the finger 13, and the pressing pad 1 is provided on the lower surface of the end.
9, the pressing member 18 can press the finger 13 from the first joint to the vicinity of the second joint.

Accordingly, when the abdomen of the finger 13 is placed on the printed circuit board 12, the rotation side end of the pressing member 18 is lightly pressed by the finger 20 of the other hand, so that the first The abdomen including the joint part and the second joint part is the electrode array 15.
And the input electrode 16 is uniformly pressed.

On the base 11, a reference mark 21 for clarifying a position where a pressing force is mainly applied to the finger 13 by a pressing operation of the pressing member 18 is formed on the printed circuit board 1.
2 are provided on both sides. The output electrodes 14 of the electrode array 15 are arranged, for example, at intervals of 0.2 mm.

FIG. 2 shows a configuration of a driving circuit for driving the sensor section, and a signal of a predetermined frequency is selectively supplied to each output electrode 14 of the electrode array 15 from an output electrode driving circuit 22 which is a driving means. It has become. Further, a signal is detected from the input electrode 16 by a detection circuit 23 which is a detection means.

As shown in FIG. 3, the output electrode drive circuit 22 includes 200 two-input AND gates AND1, AND2.
AND2, AND3,..., AND200 are provided, and one input terminal of each of the AND gates AND1 to AND200 is connected to the AND gate of FIG.
The electrode selection signals SEL1, SEL2, SE as shown in FIG.
L3,... SEL200 are alternately supplied, and a common carrier signal as shown in FIG. 4A is supplied to the other input terminal. The carrier signal is a high-frequency signal having a frequency of about several hundred kHz to several MHz, for example, a frequency of 2 MHz and a predetermined amplitude, and the electrode selection signal SE.
.. And SEL200 are sequentially supplied to the output electrodes 14 (1) to 14 (200) at the timing of input to the AND gates AND1 to AND200. For example, as shown in FIG. 5, at the timing when the electrode selection signal SEL1 is input to the AND gate AND1, the carrier signal is applied to the first output electrode 14 (1) for that period.
To be supplied as a drive signal.

The detection circuit 23, as shown in FIG.
The amplifier 24 includes an amplifier 24, a detection circuit 25, an A / D converter 26, an oscillator 27, a control circuit 28, and an I / F (interface) circuit 29. After the weak signal from the input electrode 16 is amplified by the amplifier 24, Detected by the detection circuit 25,
The detection output is converted into a digital signal by the A / D converter 26 and then supplied to the control circuit 28.

The oscillator 27 includes the detection circuit 25 and A
An operation clock is supplied to the / D converter 26 to make the operation timing. The control circuit 28 includes an I / F circuit 29
So that the digital signal from the A / D converter 26 is transmitted to the external device 30 such as a personal computer (PC) for comparing and matching finger unevenness information via the I / F circuit 29. Has become.

In such a configuration, the abdomen of the finger 13 is placed on the printed circuit board 12 so that the first joint 13a and the second joint 13b of the finger 13 are located on the electrode array 15, as shown in FIG. Put on top. At this time, the position of the reference mark 21 is located between the first joint and the second joint and near the second joint. Then, the rotating side end of the pressing member 18 is lightly pressed downward with the finger 20 of the other hand.

In this way, the abdomen extending from the first joint to the second joint of the finger 13 is uniformly pressed against the output electrodes 14 and the input electrodes 16 of the electrode array 15. Since the pressing pad 18 is provided on the pressing member 18, a large force is not concentrated on the finger 13.

In this state, the electrode selection signals SEL1 to SEL2
When 00 is alternately supplied to each output electrode 14, at a certain timing, as shown in FIG. 7, the carrier signal cs from one of the output electrodes 14 passes through the finger from the position of the finger on that electrode. It flows to the input electrode 16. At this time, the capacitance formed by the gap between the selected output electrode 14 and the finger 13 thereon, and the capacitance from the position of the finger above the selected output electrode 14 to the position of the finger above the input electrode 16 The impedance information consisting of a series component of the impedance of the finger and the capacitance formed in the gap between the input electrode 16 and the finger 13 on the input electrode 16 appears as a change in amplitude on the carrier signal.

The carrier signal flowing into the input electrode 16 is detected by the detection circuit 23, detected and output. That is, the amplitude of the carrier signal rises and falls according to the impedance, and the detection circuit 25 removes the carrier component from the signal by detection and outputs the signal. Thus, the detection circuit 23 detects the carrier signal from the input electrode 16 by using the detection circuit 25.
, A voltage waveform corresponding to the irregularities on the surface of the finger 13 is obtained. The characteristic of this voltage waveform is that the joint of the finger 13 has a large amount of dent due to wrinkles, so that the signal is more attenuated and the level is greatly reduced in this portion.

After this voltage waveform is converted into a digital signal by the A / D converter 26, it is transmitted by the control circuit 28 to the external device 30 via the I / F circuit 29. Thus,
The external device 30 can capture the unevenness information on the surface of the finger 13 as a digital signal. The external device 30 applies a band-pass to the captured finger unevenness information, further performs amplitude adjustment and normalization, and performs positioning and comparison with the previously stored finger unevenness information for each individual for comparison and identification. I do.

As described above, the abdomen of the finger 13 is
5 and the input electrode 16, the vicinity of the second joint is positioned at the position of the reference mark 21, and then the pressing member 18 is used to lightly press the back of the finger 13, particularly from the first joint to the second joint. Of the electrode array 15 and the input electrode 1
6 can be uniformly pressed and contacted. Therefore, the contact of the finger 13 with the electrode can always be performed stably, and the irregularity information of the finger can be input to the external device 30 with a small variation. Moreover, the positioning of the finger 13 can be easily performed by the reference mark 21.

(Second Embodiment) This embodiment shows another embodiment of the sensor section. As shown in FIG. 8, a pressing member 18 is replaced by a second electrode instead of a pressing pad. The input electrode 161 is provided and the input electrode is eliminated from the printed circuit board 12. In this way, the input electrode 161 is easily and reliably pressed against the back of the finger 13 by the pressing operation of the pressing member 18. Will do. Therefore, even if the input electrode is formed on a printed circuit board, the finger 1 may not be in good contact with the vicinity of the second joint of the finger, thereby making it difficult to make contact with the input electrode.
The input electrode 161 can be reliably pressed and contacted from the back of the input electrode 161.

Also in this embodiment, since the abdomen of the finger 13 can be uniformly pressed into contact with the electrode array 15 by applying the pressing force by the pressing member 18, the same operation and effect as in the above-described embodiment can be obtained. Play.

(Third Embodiment) This embodiment shows another embodiment of the sensor section. As shown in FIG. 9, an input electrode 161 is provided on a pressing member 18 and a printed circuit board 12 is provided. Instead of this, a thin printed circuit board 121 such as a flexible flexible board is attached on a gel-like sheet member 31 which is a flexible member.

In this way, the input electrode 161 can easily and surely come into pressure contact with the back of the finger 13 by the pressing operation of the pressing member 18. Further, the finger 13 is given a gel-like sheet member 31 by applying a pressing force by the pressing member 18.
, The finger 13 can be smoothly pressed into contact with the electrode array 15.

Also in this embodiment, since the abdomen of the finger 13 can be uniformly pressed into contact with the electrode array 15 by applying the pressing force by the pressing member 18, the same operation and effect as in the above-described embodiment can be obtained. Play.

(Fourth Embodiment) This embodiment shows another embodiment of the sensor unit. As shown in FIG. 10, a support member 171 is provided at the center of the base 11, and A support member 171 rotatably supports an intermediate portion of a pressing member 181 provided with an input electrode 161 on the lower surface on one end side. The pressing member 1 is located at the position of the support member 171.
A spring member 3 that constantly urges one end of the coil 81 clockwise in the figure.
2 are provided.

In such a configuration, the other end sides of the base 11 and the pressing member 181 are pinched by the finger 20 to press the pressing member 181.
Is pressed against a fingertip such that one end of the fingertip opens against the spring force of the spring member 32. Then, the finger 13 is pushed into the opening, and the abdomen of the finger 13 is placed on the printed circuit board 12. Thereafter, when the finger 20 is released, one end of the pressing member 181 is urged clockwise by the spring force of the spring member 32, and
3 is sandwiched between the printed circuit board 12 and the pressing member 181. Thus, the finger 13 is pressed at one end of the pressing member 181, and the abdomen of the finger 13 comes into pressure contact with the electrode array 15 on the printed circuit board 12.

In this way, the input electrode 161 can easily and surely come into contact with the back of the finger 13 by the pressing action of the pressing member 181. Further, the abdomen of the finger 13 comes into uniform pressure contact with the electrode array 15 on the printed circuit board 12.

Therefore, this embodiment has the same operation and effect as those of the above-described embodiment. Further, since the pressing force of the pressing member 181 is obtained by the spring force of the spring member 32, there is no need to press the pressing member 181 with the finger 13, and the operation of applying the pressing force to the finger 13 can be simplified.

(Fifth Embodiment) This embodiment shows another embodiment of the sensor unit. As shown in FIG. 11, the position of the finger 13 is different from that of FIG. A restricting member 33 serving as a stopper is provided on the base 11 to be fixed, and a finger contact portion of the restricting member 33 is formed on the base 11 as an inclined surface that is inclined toward the end, and a second electrode is formed on the inclined surface. The input electrode 162 is provided. A pressing pad 19 is provided on the lower surface on one end side of the pressing member 181.
Others are the same as the above-described fourth embodiment.

In such a configuration, the other end sides of the base 11 and the pressing member 181 are pinched by the finger 20 to press the pressing member 181.
Is pressed so that one end thereof opens against the spring force of the spring member 32. Then, the finger 13 is pushed into the opening,
Is placed on the printed circuit board 12. At this time, the tip of the finger 13 is connected to the input electrode 1 on the inclined surface of the regulating member 33.
62.

Thereafter, when the finger 20 is released, the pressing member 18 is released.
1 is urged clockwise by the spring force of a spring member 32 to move the finger 13 between the printed circuit board 12 and the pressing member 1.
81. Thus, the finger 13 is pressed at one end of the pressing member 181, and the abdomen of the finger 13 comes into pressure contact with the electrode array 15 on the printed circuit board 12.

In this manner, the position of the finger 13 is fixed by the pressing action of the pressing member 181, and the tip of the finger 13 is kept in contact with the input electrode 162 provided on the regulating member 33. Further, since the distal end position of the finger 13 is regulated by the regulating member 33, the finger 13 can be easily positioned. Then, the abdomen of the finger 13 comes into uniform pressure contact with the electrode array 15 on the printed circuit board 12. Therefore, this embodiment has the same operation and effect as those of the above-described embodiment.

(Sixth Embodiment) This embodiment shows another embodiment of the sensor section. As shown in FIG. 12, the position of the finger 13 is different from that of FIG. A regulating member 33 serving as a stopper is provided on the base 11 to be fixed, and projections 34a and 34b are provided on both sides of the regulating member 33 and the printed circuit board 122 so as to be positioned. Stand 11
Is slidable in the longitudinal direction of the finger 13. Further, a guide 35 having a plurality of grooves 36 provided at regular intervals is provided on both sides of the base 11 located on the side of the printed circuit board 122. The protrusion 34a of the restricting member 33 and the groove 36 of the guide 35 form the restricting member 3.
3 can be positioned at an appropriate position on the base 11, and the projections 34b of the printed circuit board 122 and the grooves 36 of the guides 35 allow the printed circuit board 12 to be positioned.
2 can be positioned at an appropriate position on the base 11. The rest is the same as in the above-described second embodiment.

In such a configuration, when the length of the finger 13 is a normal size, as shown in FIG. 14A, the distance between the regulating member 33 and the printed circuit board 122 is set to a predetermined distance. And the input operation of the finger unevenness information to the external device is performed. In the case of a person whose finger 13 is long, FIG.
As shown in FIG. 4 (b), the printed circuit board 122 is slid in the direction of the arrow in FIG.
The distance between the finger 22 and the finger 22 is set to be large, and the input operation of the finger unevenness information to the external device is performed. Further, in the case of a person whose finger 13 is short, as shown in FIG.
3 is slid in the direction of the arrow in the drawing to bring the regulating member 33 close to the end of the printed circuit board 122, and the input operation of the unevenness information of the finger to the external device is performed.

As described above, by sliding one or both of the printed circuit board 122 and the regulating member 33, the finger 13 is moved.
For example, the position of the finger 13 with respect to the electrode array 15 and the input electrode 16 can be reliably determined for such a person. The positioning of the printed circuit board 122 and the regulating member 33 during sliding is performed by the guides 35 on both sides and the projections 34 of the regulating member 33.
a and the projections 34b of the printed circuit board 122 can be surely achieved.

In this embodiment, too, the finger 13 is pressed by the pressing member 18 to press the printed circuit board 12.
Since the two electrodes can be uniformly pressed into contact with each other, the same operation and effect as those of the above-described embodiment can be obtained.

In each of the above-described embodiments, the first electrode group including a plurality of electrodes is used as the output electrode, and the second electrode is used as the input electrode. However, the present invention is not limited to this. The group may be an input electrode and the second electrode may be an output electrode. However, in this case, a carrier signal is supplied to the second electrode, and a signal is sequentially detected and detected from each electrode of the first electrode group in a selective manner.

[0047]

According to the invention described in each of the claims, the finger is brought into contact with each electrode of the first electrode group by pressing the finger with each electrode of the first electrode group using the pressing member. In this manner, the unevenness information of the finger can be input with a small variation. According to the second aspect of the present invention,
The vicinity of the second joint of the finger can be easily positioned at the pressing force application position. According to the third and fifth aspects of the present invention, the second electrode can be easily and reliably brought into contact with the finger. According to the fourth aspect of the invention, the positioning of the finger can be further facilitated.

According to the sixth aspect of the present invention, even a person with a long finger and a person with a short finger can surely press the finger against the electrode. According to the invention of claim 7, the operation of applying the pressing force to the finger can be further simplified. Further, according to the invention of claim 8, the pressing contact of the finger to the first electrode group can be further smoothly performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a sensor unit according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an overall configuration in the embodiment.

FIG. 3 is a circuit configuration diagram of an output electrode drive circuit in the embodiment.

FIG. 4 is a signal waveform diagram showing an input signal from the output electrode drive circuit of the embodiment.

FIG. 5 is a signal waveform chart showing an example of an input signal from the output electrode drive circuit of the embodiment.

FIG. 6 is a block diagram illustrating a configuration of a detection circuit in the embodiment.

FIG. 7 is a view for explaining contact of a finger with a sensor unit and a signal flow in the embodiment.

FIG. 8 is a diagram illustrating a configuration of a sensor unit according to a second embodiment of the present invention.

FIG. 9 is a diagram illustrating a configuration of a sensor unit according to a third embodiment of the present invention.

FIG. 10 is a diagram showing a configuration and operation of a sensor unit according to a fourth embodiment of the present invention.

FIG. 11 is a diagram showing a configuration of a sensor unit according to a fifth embodiment of the present invention.

FIG. 12 is a diagram illustrating a configuration of a sensor unit according to a sixth embodiment of the present invention.

FIG. 13 is a perspective view showing the configuration of a graduated guide and a printed circuit board in the embodiment.

FIG. 14 is a diagram for explaining the operation of the sensor unit in the embodiment.

FIG. 15 is a block diagram showing a conventional example.

FIG. 16 is a view for explaining the finger unevenness information detecting operation of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 13 ... Finger 14 ... Output electrode 15 ... Electrode array (1st electrode group) 16 ... Input electrode (2nd electrode) 18 ... Pressing member 22 ... Output electrode drive circuit (drive means) 23 ... Detection circuit (detection means)

Claims (8)

[Claims] 1. A first electrode group in which a plurality of electrodes are arranged at predetermined intervals along a longitudinal direction of a finger of a subject, and when the finger is brought into contact with the first electrode group, the first electrode group An electrical signal is supplied to one of the electrodes of the first electrode group and one of the second electrodes in a state in which a finger is in contact with the second electrode that is in contact with the first electrode group and the second electrode at the same time. Driving means for
The drive unit includes a detection unit that detects an electric signal from the other electrode that does not supply an electric signal, and a pressing member that applies a pressing force to the finger to press and contact the finger with at least the first electrode group. A finger unevenness information input device. 2. The finger unevenness information input device according to claim 1, wherein a reference mark is provided at a pressing force application position of the pressing member. 3. A first electrode group in which a plurality of electrodes are arranged at predetermined intervals along a longitudinal direction of a finger of a subject, and a pressing force for pressing a finger into contact with the first electrode group. A pressing member to be applied to the finger, a second electrode provided on the pressing member, and pressing the finger when the pressing force is applied to the finger by the pressing member; and a first electrode group and a second electrode. While the finger is in contact with each electrode of the first electrode group and the second electrode
And a driving means for supplying an electric signal to one of the electrodes, and a detecting means for detecting the electric signal from the other electrode to which the electric signal is not supplied. 4. A first electrode group in which a plurality of electrodes are arranged at predetermined intervals along a longitudinal direction of a finger of a subject, and when the finger is brought into contact with the first electrode group, An electrical signal is supplied to one of the electrodes of the first electrode group and one of the second electrodes in a state in which a finger is in contact with the second electrode that is in contact with the first electrode group and the second electrode at the same time. Driving means for
A detecting means for detecting an electric signal from the other electrode to which the driving means does not supply an electric signal; a pressing member for applying a pressing force to the finger to press and contact the finger with at least the first electrode group; A finger regulating member for regulating the position of the tip of the finger while the finger is in contact with the electrode group. 5. A first electrode group in which a plurality of electrodes are arranged at predetermined intervals along a longitudinal direction of a finger of a person to be measured, and a first electrode group in a state where a finger is in contact with the first electrode group. A regulating member for regulating the position of the tip of the finger, a second electrode provided on the regulating member, the tip of the finger being in contact with the first electrode group and the second electrode being in contact with the second electrode. Driving means for supplying an electric signal to one of the electrodes of the first electrode group and one of the second electrodes; detecting means for detecting an electric signal from the other electrode to which the driving means does not supply an electric signal; And a pressing member for applying a pressing force to the finger to press and contact the one electrode group with the finger. 6. The finger unevenness information input device according to claim 4, wherein at least one or both of the first electrode group and the regulating member are movably arranged in the longitudinal direction of the finger. 7. The finger unevenness information input device according to claim 1, wherein the pressing member applies a pressing force by a spring force. 8. The finger unevenness information input device according to claim 1, wherein a flexible member is disposed on a side on which the first electrode group is arranged.