JP2021174538A - Terminal equipment for blood flow authentication device - Google Patents

Abstract

To provide hygienic terminal equipment for a blood flow authentication device that prevents the spread of pathogens such as viruses and bacteria to users even when shared in residential buildings and offices where multiple users enter and exit, and provide a blood flow authentication device.SOLUTION: Terminal equipment 10 for a blood flow authentication device includes: a housing 20 provided with an insertion hole 21 into which a finger is inserted and a lid 24 that covers the insertion hole so as to be openable and closable; a near-infrared light source 30 that irradiates the inside of the housing with near-infrared light; an ultraviolet light source 31 that emits ultraviolet light; a light reflecting member 80 that reflects the ultraviolet light; an imaging device 40 that captures an image of the near-infrared light transmitted through the finger; a fingertip detection sensor 50 that detects fingertip contact; and a finger-root detection sensor 60 that detects finger root contact. The ultraviolet light source 31 is turned on when the lid is closed, and the space inside the housing into which a finger F of a person to be authenticated is inserted is sterilized with the emitted ultraviolet light.SELECTED DRAWING: Figure 1

Description

The present invention relates to a terminal device for a blood flow authentication device and a blood flow authentication device that perform personal authentication using a blood vessel pattern obtained by imaging light transmitted through a human finger.

Conventionally, fingerprint authentication is known as a personal authentication technique for performing personal authentication, but blood flow authentication based on a blood vessel pattern has been developed due to the problem that fingerprints of other people can be forged.

In the blood flow authentication, the blood vessel patterns are individually independent, and it is said that there is no blood vessel having the same shape. In addition, since it is difficult to judge the blood vessel from the appearance, it is difficult to forge it, and it is possible to authenticate with high accuracy.

For example, in Patent Document 1, a base on which a finger is placed and a base on which the finger is placed are installed in front of the fingertip of the finger located at one end of the base and placed on the base, and from the front of the fingertip toward the back of the finger from the fingertip. A light source that irradiates light to the fingertips, and a finger that is placed on the base on the ventral side of the finger and is installed on the base corresponding to just below the finger, and the irradiation light emitted from the light source is obtained through the finger. A terminal device for a blood flow authentication device including an imaging device for imaging a blood vessel image of the above is disclosed.

Japanese Unexamined Patent Publication No. 2014-999149

In the terminal device for a blood flow authentication device disclosed in Patent Document 1, when used in a residential building or office where a plurality of users enter and exit, a virus or a bacterium is caused because the user's finger comes into contact with the inside. If a pathogen such as is attached, there is a risk that it will adhere to the user's finger and infect it.

Therefore, the present invention solves such a problem and does not spread pathogens such as viruses and bacteria to users even when they are shared in residential buildings and offices where a plurality of users enter and exit. An object of the present invention is to provide a terminal device for a hygienic blood flow authentication device.

[1] In the present invention, the palm side of the finger (F) is brought into contact with the housing (20) provided with the insertion hole (21) into which the finger (F) is inserted and the inner wall surface of the insertion hole (21). Near-infrared light is inside the housing (20) with respect to the instep side of the finger (F), which is inserted by bringing the instep side (F1) of the finger (F) into contact with the inner wall surface. From the near-infrared light source (30) that irradiates the finger, the ultraviolet light source (31) that irradiates the ultraviolet light into the insertion hole (21), and the near-infrared light source (30) that has passed through the finger (F). At a position corresponding to the fingertip of the finger (F) in contact with the inner wall surface and the imaging unit (40) that images the irradiated near-infrared light at a position facing the near-infrared light source (30). A fingertip detection sensor (50) that is installed and positions the fingertip by contact with the fingertip and detects the contact of the fingertip, and a fingertip (F5) of the finger (F) that is in contact with the inner wall surface. It is a terminal device for a blood flow authentication device, which is installed at a position corresponding to the above and includes a fingertip detection sensor (60) for detecting the contact of the fingertip (F5).

[2] Then, a light reflecting member (80) installed at a position capable of receiving the ultraviolet rays from the ultraviolet light source (31) and reflecting the ultraviolet rays is provided in the insertion hole (21). It is described in the above-mentioned [1].

[3] The ultraviolet light source (31) is installed on at least one of the instep side (F1) and the palm side (F2) of the finger (F) to be inserted. Alternatively, it is the terminal device for the blood flow authentication device according to the above [2].

[4] The blood flow authentication device according to any one of the above [1] to [3], further comprising a lid portion (24) that covers the insertion hole (21) so as to be openable and closable. It is a terminal device.

The terminal device for the blood flow authentication device of the present invention maintains a hygienic state that prevents the spread of pathogens such as viruses and bacteria to the users even when they are shared in a residential building or office where a plurality of users enter and exit. be able to.

It is a vertical cross-sectional view at the time of using the terminal device for a blood flow authentication device in the 1st Embodiment of this invention. It is a vertical cross-sectional view of the terminal device for a blood flow authentication device in the first embodiment of the present invention when not in use (when sterilized). FIG. 5 is a sectional view taken along line AA when the terminal device for a blood flow authentication device according to the first embodiment of the present invention is used. It is sectional drawing of BB at the time of using the terminal device for a blood flow authentication apparatus in the 1st Embodiment of this invention. It is a flowchart which shows the process of the blood flow authentication in the blood flow authentication apparatus using the terminal device for the blood flow authentication apparatus according to 1st Embodiment of this invention. It is a flowchart which shows the process of sterilization in the blood flow authentication apparatus using the terminal device for the blood flow authentication apparatus in the 1st Embodiment of this invention. It is a vertical sectional view at the time of using the terminal device for a blood flow authentication device in the 2nd Embodiment of this invention. It is a vertical cross-sectional view of the terminal device for a blood flow authentication device in the second embodiment of the present invention when not in use (when sterilized).

Hereinafter, the terminal device for the blood flow authentication device according to the embodiment of the present invention will be described with reference to the drawings. The blood authentication device using the terminal device for the blood flow authentication device is inserted into the insertion hole of the housing with the back side of the finger of the person to be authenticated placed on the upper side and the palm side placed on the lower side. The blood vessel pattern is imaged with the back side of the finger in contact with the upper side of the inner wall surface of the insertion hole for authentication.

The terminal device 10 for a blood flow authentication device according to the present invention authenticates the blood vessel pattern of the person to be authenticated, controls a near-infrared light source, an ultraviolet light source, a finger detection sensor, an image pickup device, etc., and stores a registered or imaged blood vessel pattern. , A blood flow authentication device is configured by being connected to an authentication control device (not shown) that performs matching processing and the like. As shown in FIGS. 1 to 4 of the first embodiment or FIGS. 7 and 8 of the second embodiment, the terminal device for the blood flow authentication device is mainly authenticated to capture a blood pattern. It includes a housing 20 into which a person's finger F is inserted, an infrared light source 30, an ultraviolet light source 31, an image pickup device 40, and the like.

The housing 20 is provided with an insertion hole 21 into which the finger F of the person to be authenticated for imaging the blood pattern is inserted. As shown in FIGS. 1 to 4, in the housing 20, LEDs serving as a near-infrared light source 30 and an ultraviolet light source 31 are inserted into the housing 20 above the insertion hole 21 which is the back side F1 of the finger F to be inserted. It is arranged and included along the axial direction of 21. Alternatively, as shown in FIGS. 7 and 8, an LED serving as a near-infrared light source 30 is inserted in the insertion hole 21 above the insertion hole 21 which is the back side F1 of the finger F to be inserted. A plurality of LEDs are arranged and included along the axial direction, and an LED serving as an ultraviolet light source 31 is arranged below the insertion hole 21 which is the palm side F2 of the finger F to be inserted. On the other hand, in the housing 20, the image pickup device 40 is arranged below the insertion hole 21 at a position facing the near-infrared light source 30.

Further, a translucent plate 22 made of a synthetic resin such as acrylic capable of transmitting near infrared rays emitted from the near infrared light source 30 is interposed on the inner wall surface located on the upper side of the insertion hole 21. The finger F of the person to be authenticated is prevented from coming into direct contact with the near-infrared light source 30 and the ultraviolet light source 31. Further, a lid portion 24 that covers the insertion hole 21 so as to be openable and closable is provided on the outside of the housing 20, and the lid portion 24 is inserted when the finger F of the person to be authenticated is not inserted into the insertion hole 21. The hole 21 is covered, and the insertion hole 21 appears when the lid portion 24 is moved such as by rotating or sliding during use. As will be described later, by having the lid portion 24, the timing of turning on and off the ultraviolet light source 31 is measured by opening and closing the lid portion 24, and the ultraviolet light is prevented from leaking from the inside of the housing 20 while the ultraviolet light source 31 is on. I have to.

Further, on the inner wall surface located on the upper side of the housing 20, as shown in FIGS. 2 and 8, a pair of left and right light sources 30 are centered on the near infrared light source 30 arranged along the axial direction of the insertion hole 21. The support portion 23 is provided so as to project downward.

The support portion 23 supports both side surfaces of the finger F of the person to be authenticated to perform blood flow authentication. Specifically, the finger F of the person to be authenticated is located directly under the near-infrared light source 30 and the ultraviolet light source 31, and the inner wall surface of the insertion hole 21 in the housing 20 is in contact with the back side F1 of the finger F of the person to be authenticated. In this state, both sides of the finger F are supported.

The support portion 23 is composed of a pair of left and right sides, and both are installed so as to project along the inner wall surface of the insertion hole 21 with a predetermined gap. That is, depending on the shape of the insertion hole 21, it may be linear or curved with respect to the axial direction. Further, it is desirable that the support portion 23 is formed with a length corresponding to substantially the entire length of the finger F in the longitudinal direction, and the portion in contact with the finger F is formed in a substantially arc shape so as to be along the side surface of the finger. .. The support portion 23 formed in this way is formed of a material that blocks visible light and near-infrared light. As a result, it is possible to reduce the wraparound of light from the near-infrared light source 30 to the image pickup apparatus 40, and it is possible to suppress the occurrence of halation during imaging.

Further, although the support portion 23 supports one finger F to be authenticated, a similar support portion may be provided on one side or both sides of the support portion 23. By providing the plurality of support portions in this way, it is possible to support an adjacent finger other than the finger F for authentication. This makes it possible to prevent so-called rolling in which the finger F supported by the support portion rotates along the axis of the finger F. By preventing rolling, the captured image can be made constant, and a clearer blood vessel pattern can be captured.

Further, a fingertip detection sensor 50 is provided at a position corresponding to the fingertip of the finger F inserted through the insertion hole 21, and a fingertip detection sensor 60 is provided at a position corresponding to the fingertip F5 of the finger F. Further, in the housing 20, a filter 70 that does not transmit light other than near-infrared light is provided above the image pickup apparatus 40.

The near-infrared light source 30 is composed of a member that emits near-infrared light such as an LED having a condensing lens at its tip. Near-infrared light having a wavelength in the range of 700 to 2500 nm emitted from the near-infrared light source 30 passes through the finger F of the person to be authenticated and highlights the blood vessel pattern in the finger F of the person to be authenticated. The near-infrared light source 30 is arranged above the insertion hole 21 which is the back side F1 of the finger F to be inserted. In the first embodiment and the second embodiment, in the near-infrared light source 30, four LEDs are arranged along the axial direction of the insertion hole 21 in the housing 20, that is, the longitudinal direction of the finger F. It is not limited to. For example, the number is not limited to four, and an integrated elongated light emitting element may be used. The amount of light emitted from the near-infrared light source 30 and the irradiation time can be controlled by the light amount adjusting means.

The ultraviolet light source 31 is composed of a member that emits ultraviolet light such as an LED having a condensing lens at its tip. The ultraviolet light emitted from the ultraviolet light source kills or inactivates pathogens such as bacteria and viruses adhering to the fingertip detection sensor 50 and the translucent plate 22 inside the housing 20. The wavelength of the ultraviolet light emitted from the ultraviolet light source 31 is preferably 260 to 285 nm. When the wavelength of ultraviolet light is in this range, viruses such as influenza virus, coronavirus, norovirus, and SARS can be inactivated within about 60 seconds, and the virus can be quickly irradiated without taking time to prepare for irradiation. can do. The ultraviolet light source 31 is arranged on the upper side of the insertion hole 21 which is the instep side F1 of the finger F to be inserted, or on the lower side of the insertion hole 21 which is the palm side F2 of the finger F to be inserted. In the first embodiment, the ultraviolet light source 31 is arranged closer to the fingertip F3 of the finger F than the near-infrared light source 30, and more specifically, the most of the plurality of near-infrared light sources 30 installed. One LED is installed on the fingertip F3 side more than the near infrared light source 30 installed on the fingertip F3 side. Further, in another embodiment, the ultraviolet light source 31 is not limited to one, and may be installed in the middle of a plurality of infrared light sources 30 or the like. Then, in the second embodiment, the ultraviolet light source 31 is arranged on the finger base F5 side of the finger F to be inserted, and more specifically, one LED is installed near the opening of the insertion hole 21. There is. Further, in another embodiment, the ultraviolet light source 31 is not limited to one as well, and may be installed on the fingertip F3 side of the finger F or the like. The amount of light emitted from the ultraviolet light source 31 and the irradiation time can be controlled by the light amount adjusting means.

The image pickup apparatus 40 captures a blood vessel obtained through the finger F and the filter 70 among the light emitted from the near-infrared light source 30. The image pickup device 40 includes an image pickup element, an optical system including a lens, and a circuit for driving an image pickup, and sandwiches the finger F of the person to be authenticated on the lower side of the insertion hole 21, that is, on the lower side of the filter 70. It is installed at a position facing the near-infrared light source 30. Specifically, the optical axis of the image pickup apparatus 40 is installed at a position below a substantially central portion in the longitudinal direction in which the near-infrared light source 30 is installed. Further, the image pickup apparatus 40 focuses slightly on the inside of the finger from the epidermis on the palm side of the person to be authenticated so as not to recognize the fingerprint or the like.

The fingertip detection sensor 50 detects the fingertip F3 of the person to be authenticated to be inserted into the insertion hole 21 of the housing 20. The fingertip detection sensor 50 is installed at a position corresponding to the fingertip F3 of the finger F supported by the support portion 23, and is formed of, for example, a short metal plate or the like. When the fingertip F3 of the person to be authenticated comes into contact with the fingertip detection sensor 50, the fingertip F3 in the axial direction is positioned in the insertion hole 21 and the contact is electrically detected. Specifically, the surface of the fingertip detection sensor 50 is made of a conductive material such as aluminum, and contact is detected by a change in capacitance.

Further, the fingertip detection sensor 50 is installed so as to have a height at which the fingertip F3 of the person to be authenticated abuts and the claw F4 of the finger F of the person to be authenticated does not abut. For example, it may be installed at the tip of a substantially L-shaped member projecting downward from above the inner wall surface of the insertion hole 21 in the housing 20, or may be directed from above to below the inner wall surface of the insertion hole 21 and covered. It may be installed at the tip of a member provided with a hole through which the certifier's claw F4 can be inserted.

The fingertip detection sensor 60 detects the fingertip F5 of the person to be authenticated to be inserted into the insertion hole 21 of the housing 20. The fingertip detection sensor 60 is installed at a position corresponding to the fingertip F5 of the finger F supported by the support portion 23, and is formed of, for example, a short metal plate or the like. When the fingertip F5 of the person to be authenticated comes into contact with the fingertip detection sensor 60, the contact is electrically detected. Specifically, the surface of the fingertip detection sensor 60 is made of a conductive material such as aluminum, and contact is detected by a change in capacitance.

Further, in the fingertip detection sensor 60, the finger F of the person to be authenticated is located directly below the near-infrared light source 30, and the inner wall surface of the insertion hole 21 in the housing 20 and the instep side F1 of the finger F of the person to be authenticated Is installed so as to come into contact with the instep side F1 of the fingertip F5 in a state where the fingers are in contact with each other. It is desirable that the lower end surface of the fingertip detection sensor 60 that the fingertip F5 contacts is formed in a substantially arc shape so as to match the shape of the fingertip F5. As a result, the finger F5 of the person to be authenticated can be reliably supported, and the finger F can be reliably detected.

Then, both the fingertip detection sensor 50 and the fingertip detection sensor 60 detect the finger F of the person to be authenticated, so that it can be determined that the finger is not a pseudo finger like a finger but a living body. In this way, it is preferable to control so that the detection blood flow authentication operation is started after the finger F of the person to be authenticated can be confirmed by both the fingertip detection sensor 50 and the fingertip detection sensor 60.

Further, the light reflecting member 80 is a member that receives the ultraviolet rays from the ultraviolet light source 31 and is installed in the insertion hole 21 at a position where the ultraviolet rays from the ultraviolet light source 31 can be reflected. In the first embodiment, the light reflecting member 80 is installed facing the ultraviolet light source 31 with the fingertip detection sensor 50 interposed therebetween, and in the second embodiment, the light reflecting member 80 is arranged closer to the fingertip F3 of the finger F than the near infrared light source 30. It reflects light such as ultraviolet light. Specifically, as the light reflecting member 80, a mirror or the like is preferable. The light reflecting member 80 reflects and diffusely reflects the ultraviolet light emitted from the ultraviolet light source 31 to spread the ultraviolet light widely inside the housing 20, especially in the insertion hole 21, and hits the back side F1 of the finger F. Bacteria and viruses adhering to the light-transmitting plate 22, the support portion 23, the fingertip detection sensor 50, and the fingertip detection sensor 60 in contact with each other can be killed or inactivated. Further, the light reflecting member 80 has a flat plate shape in the first embodiment and the second embodiment, but in other embodiments, the ultraviolet light emitted from the ultraviolet light source 31 reaches the insertion hole 21. It may have irregularities as long as the ultraviolet light from the ultraviolet light source 31 is reflected and diffusely reflected.

Further, regardless of the presence or absence of the light reflection member 80 described above, it is preferable that at least the surface of the fingertip detection sensor 50 among the fingertip detection sensor 50 and the fingertip detection sensor 60 described above is smoothed like a mirror surface. In this way, even in a housing having a size that makes it difficult to provide a space for installing the light reflecting member 80 by making it smooth like a mirror surface, at least the ultraviolet light emitted from the ultraviolet light source 31 is emitted from the fingertips. The detection sensor 50 can reflect and diffusely reflect ultraviolet light widely inside the housing 20 to kill or inactivate the attached bacteria and viruses. Of course, the surface of the fingertip detection sensor 50 or the like may be a curved surface having irregularities as long as it is smooth enough to reflect and diffusely reflect ultraviolet light.

Further, in order to enhance the effects of killing attached bacteria and inactivating viruses, a metal oxide exhibiting photocatalytic activity such as titanium oxide having an anatase-type crystal structure is applied to the inside of the housing 20 to coat a photocatalytic layer. It is also preferable to provide. The inside of the housing 20 here is the inner wall surface of the insertion hole 21 into which the finger F is inserted, and more specifically, the lower surface of the transparent plate 22 with which the finger F abuts, the surface of the support portion 23, and further. , The palm side 2 of the finger F, which is the surface such as the upper surface of the filter 70 and the side surface of the insertion hole 21. It is preferable not to provide a photocatalyst layer on the surfaces of the fingertip detection sensor 50 and the fingertip detection sensor 60 in order to reduce the electrical conductivity.

The blood flow authentication device 10 is configured in this way, and a blood flow authentication device configured by connecting an authentication control device (not shown) to the terminal device 10 will be described with reference to FIGS. 5 and 6. .. The authentication control device includes authentication of the blood vessel pattern of the person to be authenticated, lighting of the near-infrared light source 30 and the ultraviolet light source 31, control of the finger detection sensor, the image pickup device 40, etc., storage of the registered or imaged blood vessel pattern, matching processing, etc. Is to do.

As shown in FIG. 5, the process related to blood flow authentication will be described below. First, in S10, a detector such as a switch that contacts and interlocks with the lid 24 and a non-contact sensor that detects a change in the distance to the lid 24 indicates that the person to be authenticated has opened the lid 24. Detect. This operation triggers the blood flow authentication process to start. Then, the person to be authenticated brings the finger F along the support portion 23 and brings the instep side F1 into contact with the light transmitting plate 22.

In S11, it is determined whether or not the finger F is detected by both the fingertip detection sensor 50 and the fingertip detection sensor 60 by the operation of the person to be authenticated. The determination is performed by an authentication control device connected to the blood flow authentication device terminal device 10. If the judgment result is affirmative, the process proceeds to S12 as a living body and the authentication operation is started. Notify that it is not appropriate and end the blood flow authentication process.

In S12, the IR-LED, which is a near-infrared light source 30, is emitted by the authentication control device, and light is emitted from the back side F1 of the finger F of the person to be authenticated. Then, for example, by a predetermined setting in the light amount adjusting means, the process proceeds to S13 when the illuminance of the IR-LED is stable.

In S13, the image pickup device 40 is operated by the authentication control device to take a picture of the finger F. The captured image is supplied to the authentication control device. In the imaging, a plurality of images may be imaged for each appropriate illuminance, and then a predetermined area may be cut out and joined to form an image of one finger F, or one image from a predetermined illuminance. It may be the one that images only. The image processing is not limited to this, and processing can be combined as appropriate.

In S14, the authentication control device determines whether or not the captured image and the registered image of the person to be authenticated match. At this time, in the blood flow authentication, in the present embodiment, the shape of the blood flow is pattern-extracted and image-processed in the same manner as in the conventional case, and the feature point extraction and the feature point matching are used, but other matching is performed. Processing can also be adopted.

As a result of blood flow authentication, if the captured image and the registered image match, or if the matching rate is equal to or higher than a predetermined value, the authentication control device determines that the person to be authenticated is a conforming person and sends a conforming person signal. Then, the blood flow authentication process is completed. The door associated with the blood flow authentication device is unlocked by, for example, an unlocking process, which is triggered by the conforming person signal. On the other hand, when it is determined that the person to be authenticated is not a conforming person, the blood flow authentication process is terminated by notifying that the person is not a conforming person by outputting a voice to that effect or sounding a buzzer or the like.

Then, as shown in FIG. 6, the process related to sterilization will be described below. First, in S20, the closure of the lid portion 24 is detected by a detector such as a switch that contacts and interlocks with the lid portion 24 or a non-contact type sensor that detects a change in the distance from the lid portion 24. This operation triggers the sterilization process to start, and the process proceeds to S21.

In S21, the ultraviolet light source 31 is turned on. The irradiated ultraviolet light sterilizes the space inside the housing 20 in which the finger F of the person to be authenticated is inserted.

In S22, the lighting time of the ultraviolet light source 31 is determined. After turning on the ultraviolet light source 31 and starting to irradiate the ultraviolet light, it is determined whether a preset time such as 5 seconds, 30 seconds, or 60 seconds has elapsed. If the predetermined time has elapsed, the process proceeds to S24, and if not, the process proceeds to S23. It is preferable that the preset irradiation time of the ultraviolet light source 31 can be changed so as to be more effective against epidemic bacteria and viruses.

In S23, when the ultraviolet light source 31 has not been turned on for a predetermined time, it is determined whether the lid portion 24 is opened. If it is detected that the lid portion 24 has been opened, the finger F of the person to be authenticated may be inserted, so the process proceeds to S24 so as not to irradiate the finger F with ultraviolet light. If the lid 24 is not opened, the ultraviolet light source 31 continues to light until a predetermined time elapses. In this embodiment, for easy understanding, the flow is to appropriately determine that the lid 24 has been opened, but the flow is not limited to this, and when it is detected that the lid 24 has been opened, the flow is not limited to this. Of course, it is also possible to forcibly end the lighting of the ultraviolet light source 31 as an interrupt program.

In S24, when the ultraviolet light source 31 has not been lit for a predetermined time, or when it has been detected that the lid 24 has been opened even though the ultraviolet light source 31 has not been lit for a predetermined time, the ultraviolet light source is ultraviolet. The light source 31 is turned off to end the sterilization process.

The above-mentioned process related to blood flow authentication is in the first embodiment shown in FIGS. 1 to 4, but can also be used in the second embodiment shown in FIGS. 7 and 8.

According to the blood flow authentication device terminal device 10 and the blood flow authentication device according to the present invention described above, the palm side F2 of the finger F is brought into contact with the lower side of the inner wall surface of the insertion hole 21 provided in the housing 20. Instead, the back side F1 of the finger F is brought into contact with the upper side of the inner wall surface and inserted, and the back side F1 of the finger F is irradiated with the light of the near infrared light source 30 from above the inside of the housing 20 to form a blood vessel. The pattern is imaged. As a result, even the person to be authenticated who is not proficient in using the blood flow authentication device does not press the blood vessels distributed on the volar side F2 of the finger F. Therefore, it is possible to prevent a decrease in the recognition rate due to a decrease in the imaging effect and to obtain a clearer image as compared with the conventional case.

Further, according to the blood flow authentication device terminal device 10 and the blood flow authentication device according to the present invention described above, when the finger F of the person to be authenticated is pulled out from the housing 20, the light of the ultraviolet light source 31 is irradiated. , That is, bacteria and viruses adhering to the inside of the housing 20, that is, the lower surface of the light transmitting plate 22 that comes into contact with the back side F1 of the person to be authenticated, the support portion 23, the fingertip detection sensor 50, the fingertip detection sensor 60, and the like. Can be killed or inactivated, and even when shared in residential buildings and offices where multiple users enter and exit, it is possible to maintain a hygienic condition that does not spread pathogens such as viruses and bacteria to users. can.

Further, in the above embodiment, the instep side F1 of the finger F of the person to be authenticated is arranged on the upper side, and the palm side F2 is arranged on the lower side, and the finger F is inserted into the insertion hole 21 of the housing 20. The blood vessel pattern was imaged and authenticated with the instep side F1 of the finger F in contact with the upper side of the inner wall surface of the 21. However, the present invention is not limited to this, and the instep side F1 of the finger F is not limited to this. On the other hand, the inside of the housing 20 may be irradiated with the light of the near-infrared light source 30 to image the blood vessel pattern.

For example, the instep side F1 of the finger F of the person to be authenticated may be arranged on the lower side, and the palm side F2 may be arranged on the upper side so that the finger F can be inserted into the insertion hole 21 of the housing 20. The side F1 may be arranged on the right side or the left side, and the palm side F2 may be arranged on the left side or the right side so that the side F1 can be inserted into the insertion hole 21. Further, it can be configured so that the instep side F1 can be inserted into the insertion hole 21 in a state of being inclined in a direction other than the vertical and horizontal directions.

Further, the shape of the insertion hole 21 of the housing 20, the shape and dimensions of the fingertip detection sensor 50 and the fingertip detection sensor 60 can be appropriately changed. Further, it is needless to say that a partial configuration can be omitted and a partially extracted configuration can be used.

10 Terminal equipment for blood flow authentication device 20 Housing 21 Insertion hole 22 Translucent plate 23 Support part 24 Lid part 30 Near infrared light source 31 Ultraviolet light source 40 Imaging device 50 Fingertip detection sensor 60 Fingertip detection sensor 70 Filter 80 Light reflection member F finger

Claims (4)

A housing provided with an insertion hole for inserting a finger,
It is closer to the inside of the housing with respect to the back side of the finger inserted by contacting the back side of the finger with the inner wall surface without contacting the palm side of the finger with the inner wall surface of the insertion hole. A near-infrared light source that irradiates infrared light,
An ultraviolet light source that irradiates ultraviolet light into the insertion hole,
An imaging unit that captures the near-infrared light emitted from the near-infrared light source that has passed through the finger at a position facing the near-infrared light source.
A fingertip detection sensor that is installed at a position corresponding to the fingertip of the finger that comes into contact with the inner wall surface, positions the fingertip by contact with the fingertip, and detects the contact of the fingertip.
A fingertip detection sensor that is installed at a position corresponding to the fingertip of the finger that comes into contact with the inner wall surface and detects the contact of the fingertip.
A terminal device for a blood flow authentication device, which is characterized by being provided with. The terminal for a blood flow authentication device according to claim 1, further comprising a light reflecting member installed at a position capable of receiving the ultraviolet rays from the ultraviolet light source and reflecting the ultraviolet rays in the insertion hole. device. The terminal device for a blood flow authentication device according to claim 1 or 2, wherein the ultraviolet light source is installed on at least one of the back side and the palm side of the finger to be inserted. The terminal device for a blood flow authentication device according to any one of claims 1 to 3, further comprising a lid portion that covers the insertion hole so as to be openable and closable.

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