JP3156217U - Probe fixture for optical biometric device - Google Patents

Abstract

An optical biometric apparatus capable of attaching an identification number label for inserting a light transmitting probe and a light receiving probe to a predetermined position of a holder on a nut portion of a probe fixture that does not peel off due to friction or the like. To do. A probe fixture includes a bolt portion having a through hole in the center, a support belt having an insertion portion formed at both ends of a connecting portion formed by a plastic member, and a bolt portion. The structure includes a nut portion 6 that fixes the insertion portions 4a of the four support belts 4 inserted. The nut portion 6 has a cap nut-like structure, has a flat top surface and a wide ring-shaped portion, and has an opening having the same inner diameter as the through hole of the bolt portion 5 at the center. An identification number label can be affixed to the wide ring-shaped portion. [Selection] Figure 1

Description

  The present invention relates to an optical biometric device such as an oxygen monitor that measures changes in hemodynamics in a living body, and in particular, a light-transmitting probe that irradiates a living body with measuring light or a light-receiving probe that receives transmitted scattered light from a measurement site is fixed. The present invention relates to a probe fixture.

  Due to the difference in absorption spectrum between oxygenated hemoglobin and deoxygenated hemoglobin by irradiating the living body with near infrared light, receiving the light emitted from the living body as the near infrared light is absorbed or scattered inside the living body An oxygen monitor that measures the relative change and absolute amount of oxygenated hemoglobin and deoxygenated hemoglobin in a non-invasive manner is known. In addition, a multi-channel oxygen monitor (hereinafter referred to as an optical biometric apparatus) is provided which has a plurality of oxygen monitor detectors and is arranged two-dimensionally to obtain an image output or an output similar to an image.

  An optical biometric apparatus for measuring a human head includes a light-transmitting probe that irradiates a living body with near-infrared light, a light-receiving probe that receives light that is absorbed or scattered inside the living body, and is emitted from the living body. The light transmitting probe and the light receiving probe are configured to include a holder for bringing the light transmitting probe and the light receiving probe into close contact with the surface of the subject's skull, a control unit that performs light emission control, light detection control, calculation, image display, and the like.

  As the holder, for example, a molded holder that is molded into a bowl shape in accordance with the shape of the skull surface is used. The molding holder is provided with a plurality of through-holes. By inserting the light-transmitting probe and the light-receiving probe into the through-holes, the probe interval (hereinafter referred to as the channel) between the light-transmitting probe and the light-receiving probe becomes constant, and the skull Light absorbed or scattered at a certain depth from the surface is measured. When the channel is 30 mm, it is considered that information with a depth of 15 mm to 20 mm from the midpoint of the channel can be obtained. The position at a depth of 15 mm to 20 mm substantially corresponds to the brain surface region, and brain activity data can be obtained.

  However, since the curvature of the human head varies depending on gender differences, age differences, and individual differences, the molded holder may not be in close contact with the subject's head, and the tip of the light transmitting probe or light receiving probe is separated from the scalp. Data may not be obtained. Even if the tip of the light transmitting probe or the light receiving probe is inserted deeper and brought into close contact with the scalp, the channel length changes, so that accurate data cannot be obtained.

  Therefore, a holder that can easily cope with a difference in curvature of the skull surface has been proposed. FIG. 4 is a diagram showing an outline of the holder 43, and FIG. 3 is a diagram showing a structure of a probe fixture that constitutes the holder 43. FIG. 3A is a perspective view of the probe fixture, and FIG. 3B is a cross-sectional view. As shown in FIG. 3, the probe fixture includes a bolt portion 35 having a through hole in the center, a support belt 4 having insertion portions 4a formed at both ends of a connecting portion 4b made of a plastic member, a bolt It has a structure comprising a nut portion 36 for fixing the insertion portions 4 a of at least two support belts 4 inserted into the portion 35. FIG. 3 shows a state where the light transmission probe 1 is inserted into the through hole of the bolt part 35. The depth of insertion of the light transmitting probe 1 into the through hole of the bolt portion 35 is determined by the protrusion 1a formed on the light transmitting probe 1 pivoting to the positioning groove 35a formed in the through hole.

  As shown in FIG. 4, the holder 43 has a structure in which the probe fixing tool is connected in a lattice shape via the support belt 4 and is fixed by a nut portion 36. The light-transmitting probe 1 or the light-receiving probe 2 is inserted into a predetermined position, and the tips of the light-transmitting probe 1 and the light-receiving probe 2 can be brought into close contact with the scalp of the subject even if there is a difference in curvature of the skull surface by the support belt 4 having plasticity.

  On the other hand, with a measuring device using light, it is possible to easily cope with a difference in the curvature of the skull surface, and the holding parts for holding the light transmitting probe and the light receiving probe are arranged in a lattice pattern on the skull surface, There has been proposed a holder in which holding parts are connected to each other by a connecting part exhibiting elasticity within a predetermined range, and further, the connecting part has rotation variability within a predetermined angle (see, for example, Patent Document 1).

JP 2002-143169 A

  As shown in FIG. 3 and FIG. 4, in order to insert the light transmitting probe 1 and the light receiving probe 2 into predetermined positions of the holder 43, identification number labels (T1, R1, T2, R2) are placed on each probe fixture or in the vicinity thereof. However, since the upper surface area of the nut portion 36 is small, an identification number label is attached to the support belt 4 in the vicinity of the probe fixture. However, depending on the angle α formed by the two support belts 4, there arises a problem that the identification number label is peeled off due to friction between the support belts 4.

  The present invention includes a bolt portion having a through hole into which a light transmitting probe that emits light from the tip or a light receiving probe that receives light from the tip is inserted, a support belt having insertion portions at both ends of a connecting portion, and the bolt portion A probe fixture having a structure comprising nut portions for fixing the insertion portions of the plurality of support belts inserted in the nut, wherein the nut portion has a cap nut-like structure and the top surface of the head is flat and the penetrating through the center. It has an opening having the same inner diameter as the hole. Therefore, the width of the flat ring-shaped portion on the top surface of the nut portion is increased.

  A flat and wide ring-shaped portion can be secured on the upper surface of the head portion of the nut portion constituting the probe fixture, and an identification number label can be attached to the ring-shaped portion and accompanying information can be displayed. The identification number label affixed to the ring-shaped portion of the nut portion is not peeled off because it is not affected by friction and the like, and it is possible to display incidental information, and an improvement in operability can be expected.

It is a figure which shows schematic structure of the probe fixing tool by the Example of this invention. It is a figure which shows schematic structure of the holder by the Example of this invention. It is a figure which shows schematic structure of the conventional probe fixture. It is a figure which shows schematic structure of the conventional holder.

  The probe fixture of the present invention relates to an optical biometric apparatus that measures a human head, and constitutes a holder that closely attaches a plurality of light transmitting probes and light receiving probes to the surface of a subject's skull in a predetermined arrangement, Holds the light transmitting probe and the light receiving probe.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing a schematic structure of a probe fixture according to an embodiment of the present invention, where (1) is a perspective view and (2) is a cross-sectional view. FIG. 2 is a view showing a schematic structure of the holder 3 constituted by the probe fixture according to the embodiment of the present invention.

  As shown in FIG. 1, the probe fixture according to the embodiment of the present invention is a support in which insertion portions 4a are formed at both ends of a bolt portion 5 having a through hole in the center and a connecting portion 4b formed of a plastic member. The belt 4 and the nut portion 6 for fixing the insertion portions 4 a of the four support belts 4 inserted into the bolt portions 5 are included. The nut portion 6 has a cap nut-like structure, has a flat top surface and a wide ring-shaped portion, and has an opening having the same inner diameter as the through hole of the bolt portion 5 at the center. FIG. 1 shows a state in which the light transmission probe 1 is inserted into the through hole of the bolt part 5. The depth of insertion of the light transmitting probe 1 into the through hole of the bolt portion 5 is determined by the protrusion 1a formed on the light transmitting probe 1 pivoting to the positioning groove 5a formed in the through hole.

  As shown in FIG. 2, the holder 3 is configured by connecting probe fixtures according to an embodiment of the present invention in a lattice shape via a support belt 4. The light-transmitting probe 1 or the light-receiving probe 2 is inserted into a predetermined position, and the tips of the light-transmitting probe 1 or the light-receiving probe 2 can be brought into close contact with the scalp of the subject even if there is a difference in curvature of the skull surface by the support belt 4 having plasticity. The nut part 6 is tightened and fixed.

  Since the present invention has the above structure, as shown in FIG. 1, a flat and wide ring-shaped portion can be secured on the upper surface of the head portion of the nut portion 6 constituting the probe fixture, and as shown in FIG. Identification number labels (T1, R1, T2, R2,...) Can be attached to the ring-shaped portion, and additional information can be displayed. The identification number label affixed to the ring-shaped portion of the nut portion 6 is not affected by friction due to the difference in the angle α formed by the two support belts 4, so that it does not peel off, and additional information can be displayed. Yes, operability can be expected to improve.

  In the embodiment shown in the figure, the nut portion 6 has a cap nut-like structure, so that a flat and wide ring-shaped portion can be secured on the top surface of the head. Instead, the nut portion 6 is operated on the top surface of the conventional nut portion 36. The present invention can be applied even if a locally flat portion is provided to the extent that it does not become an obstacle, and an identification display label is attached to the locally flat portion. Thus, the present invention is not limited to the illustrated examples, but includes various modifications.

  The present invention relates to an optical biometric device such as an oxygen monitor that measures changes in hemodynamics in a living body, and in particular, a light-transmitting probe that irradiates a living body with measuring light or a light-receiving probe that receives transmitted scattered light from a measurement site is fixed. There is a possibility that it can be used as a probe fixture.

DESCRIPTION OF SYMBOLS 1 Light transmission probe 1a Protrusion 2 Light reception probe 3 Holder 4 Support belt 4a Insertion part 4b Connection part 5 Bolt part 5a Positioning groove 6 Nut part 35 Bolt part 35a Positioning groove 36 Nut part 43 Holder alpha angle

Claims (1)

  A bolt part having a through hole into which a light transmitting probe for emitting light from the tip or a light receiving probe for receiving light from the tip is inserted, a support belt having insertion parts at both ends of the connecting part, and the bolt part inserted In the probe fixture of the optical biometric apparatus having a structure including a nut portion for fixing a plurality of insertion portions of the support belt, the nut portion has a cap nut-like structure and the top surface of the head is flat and the center is the center. A probe fixture for an optical biometric apparatus characterized by having an opening having the same inner diameter as the through hole.

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