BIOMETRIC INFORMATION DETECTION DEVICE AND METHOD OF PRODUCING THE SAME, AND BIOMETRIC INFORMATION DETECTION MODULE AND METHOD OF PRODUCING THE SAME
FIG8 is a cross-sectional view showing a schematic configuration example of a biometric information detection device as Modified Example 2 of the present disclosure  FIG7 is a cross-sectional view showing a schematic configuration example of a biometric information detection device as Modified Example 1 of the present disclosure
FIG8 is a cross-sectional view showing a schematic configuration of a biometric information detection device 1B as Modified Example 2 of the present disclosure. In the biometric information detection device 1B, a strain sensor 31 is embedded in a part of the shell 10 covering a crown part TA of the teeth T. The strain sensor 31 is connected to the battery 6 through a power line and is connected to the signal processing unit 4 through a communication line. The strain sensor 31 receives supply of power from the battery 6 and transmits a detection signal to the signal processing unit 4. Except for these points, the biometric information detection device 1B has substantially the same configuration as the biometric information detection device 1 of the above embodiment. Therefore, also in the biometric information detection device 1B, the same effects as in the biometric information detection device 1 of the above embodiment are obtained. Moreover, when the strain sensor 31 is provided, it is possible to measure the biting strength when the teeth of the upper jaw and the teeth of the lower jaw of a subject are engaged and the pressure of the cheek or tongue of a subject in contact with the strain sensor 31. When information such as the biting strength and the pressure of the cheek and tongue is used, it is possible to obtain structural strength information and teeth alignment information necessary for artificial teeth, for example, dentures and implants. Here, as the strain sensor 31, for example, a magnetostriction sensor using magnetostriction can be applied. In addition, a pressure sensor using a piezoelectric element or the like can be applied in place of the strain sensor 31.  The biometric information detection device 1 of the above embodiment emits light to the gums G, receives light reflected from the gums G, and thus detects biometric information. On the other hand, a biometric information detection device 1A of Modified Example 1 of the present disclosure shown in FIG7 emits light to an inner surface of a cheek CH in the oral cavity, receives light reflected from the inner surface of the cheek CH, and thus detects biometric information. In the biometric information detection device 1A, the light emitting element 5A is disposed to face the cheek CH with the first light-transmitting part 10T1 therebetween, and the light receiving element 5B is disposed near the light emitting element 5A so that it faces the cheek CH with the second light-transmitting part 10T2 therebetween. Therefore, the light-transmitting part 10T of the lower part 10B of the shell 10 covering the biometric information detection module 2 is provided on the side opposite to the gums G with the biometric information detection module 2 therebetween. Except for these points, the biometric information detection device 1A has substantially the same configuration as the biometric information detection device 1 of the above embodiment. Also in the biometric information detection device 1A, the same effects as in the biometric information detection device 1 of the above embodiment are obtained. For example, the biometric information detection device 1A of this modified example is beneficial when it is determined that a surface structure of the gums G of a subject is not favorable and it is difficult to obtain stable biometric information.
cross-sectional view
8
receiving module
7
network connector
14
molding.
10
shell
31
strain sensor
['12. A method of producing a biometric information detection device installed in the oral cavity, comprising: preparing a sensor including a light emitting element that is able to emit light and a light receiving element that is able to receive the light emitted from the light emitting element; after inserting the sensor between a pair of sealing films, heating and molding the pair of sealing films, and thereby forming a sealing member with which the sensor is sealed; and forming a holding member that is attached to at least one of the teeth and the gums and holds the sealing member.']