JP6778714B2 - Nasal hearing line indicator - Google Patents

Description

The present invention relates to a technique of a nasal auditory line indicator for indicating a nasal auditory canal line of a subject.

Generally, the occlusal plane of the dentition is confirmed when treating a tooth such as making a denture. This occlusal plane is a plane determined by three points, the contact point of the incisal edge of the maxillary central incision and the mesial buccal cusp of the left and right maxillary second molars, and the ideal occlusal plane is the nasal auditory canal line. It is known to be parallel to. Conventionally, in order to confirm the state of such an occlusal plane, an instrument called an occlusal plane plate has been used (for example, Patent Document 1).

The occlusal plane plate is composed of an occlusal portion arranged between the upper and lower occlusal beds of the subject whose occlusal plane is measured, and a pair of wing portions extending from this occlusal portion to the outside of the mouth and extending toward both ears. I have. In this occlusal flat plate, a pair of wing portions are configured to be parallel to the occlusal portion. Therefore, when the occlusal plane plate is attached to the subject so as to arrange the occlusal portion between the upper and lower occlusal beds, the pair of wing portions are parallel to the occlusal plane.

Therefore, according to this occlusal plane plate, the state of the occlusal plane can be confirmed by attaching the occlusal plane plate to the subject and comparing the direction in which each wing portion extends with the nasal auditory canal line. Further, by determining the occlusal plane so that each wing portion is parallel to the nasal auditory canal line, the ideal occlusal plane of the subject can be obtained. The nasal auditory canal line is a virtual line connecting the lower edge of the ala of nose and the lower edge of the tragus, and is also called a campel line.

Japanese Unexamined Patent Publication No. 2006-187407

Conventionally, in order to simply show the nasal auditory canal line to be compared with each wing portion of the occlusal flat plate on the face, a metal wire having a curved shape corresponding to the shape of the face may be used. This metal wire is configured to have an elastic force that can be hooked on the subject's face, and by hooking this metal wire on the face along the nasal auditory canal line, the nose is placed on the face. Can show the auditory line.

However, if the subject's face moves during various treatments, the metal wire also moves from the nasal auditory canal line accordingly. Therefore, the dentist has to hold the metal wire by hand so that the metal wire does not deviate from the nasal auditory canal line when performing various procedures, which requires extra work. There was a problem.

The present invention has been made in consideration of such a point on one aspect, and an object of the present invention is to easily show the nasal auditory canal line on the face without any trouble. To provide an indicator.

The present invention employs the following configuration in order to solve the above-mentioned problems.

That is, the nasal auditory line indicator according to one aspect of the present invention is a nasal auditory line indicator for indicating the nasal auditory canal line of the subject, and is configured to be wearable on both ears of the subject. A pair of left and right mounting portions and a string-shaped member attached to both mounting portions and bridged between the two mounting portions are provided, and the string-shaped member has a length that bridges between the two mounting portions. It is configured to be adjustable.

The nasal auditory line indicator according to the above configuration includes a pair of wearing portions worn on both ears of the subject, and a string-shaped member bridged between the wearing portions. The string-shaped member is configured so that the length of the string-shaped member spanning between the mounting portions can be adjusted. Therefore, after attaching both attachment parts to both ears of the subject, adjust the length of the string-like member extending between both attachment parts so that the string-like member extending from both attachment portions is caught in the nose. Therefore, the string-shaped member can be aligned along the nasal auditory canal line.

That is, by setting the nasal auditory canal line indicator according to the above configuration in this state, the nasal auditory canal line can be easily shown on the face by the string-shaped member. Further, as long as each wearing portion does not come off from each ear, the nasal auditory canal line can be continuously shown on the face by the string-shaped member without the dentist or the like holding the nasal auditory canal line indicator by hand. Therefore, according to the nasal auditory line indicator according to the configuration, the nasal auditory canal line can be simply shown on the face without any trouble.

Further, as another form of the nasal auditory line indicator according to the one side surface, each of the wearing portions may be provided with protrusions arranged in the external ear canal of each ear, and the string-shaped member is on both end sides. Each may be attached to the protrusion of each mounting portion. In this configuration, since the string-shaped member is attached to each protrusion arranged in each outer ear hole on each end side, it extends from the vicinity of the lower edge of the tragus of each ear and is bridged between both mounting portions. It is composed of. Therefore, according to the configuration, the string-shaped member can accurately indicate the nasal auditory canal line.

Further, as another form of the nasal auditory line indicator according to the one side surface, a through hole may be provided in the protrusion of at least one of the mounting portions, and the string-shaped member is on the one end side. By being passed through the through hole so as to be able to advance and retreat, the length of the bridge between the two mounting portions may be adjustable. In the nasal auditory canal line indicator according to the configuration, a portion on the one end side protruding from the through hole is provided as a portion other than the portion connecting the two mounting portions in the string-shaped member. Since the string-shaped member is passed through the through hole so as to be able to advance and retreat, the length of the portion is lengthened by pulling the portion on the one end side that has come out of the through hole of the string-shaped member, and the string-shaped member is increased. It is possible to shorten the length of the bridge between the two mounting portions. On the contrary, by pulling the part that bridges between the two mounting parts of the string-shaped member, the length of the part on the one end side that has come out from the through hole of the string-shaped member is shortened, and both mounting of the string-shaped member. The length of the bridge between the parts can be increased. Therefore, according to the configuration, the length of the string-shaped member that spans between the two mounting portions can be adjusted by a simple operation of pulling the string-shaped member, which enhances the operability of the nasal auditory line indicator. be able to.

Further, as another form of the nasal auditory line indicator according to the one side surface, the one end portion of the string-shaped member penetrates the portion on the one end side that has come out from the through hole of the string-shaped member. A retaining portion having a shape larger than the diameter of the through hole may be provided so as not to pass through the hole. According to this configuration, it is possible to prevent one end of the string-shaped member from passing through the through hole and the string-shaped member from coming off the mounting portion.

Further, as another form of the nasal auditory line indicator according to the one side surface, at least one of the pair of mounting portions is provided with a measuring portion having a scale for measuring the position of the string-shaped member. .. According to this configuration, it is possible to easily identify the position of the string-shaped member indicating the nasal auditory canal line.

According to the present invention, it is possible to provide a nasal auditory canal line indicator that can easily show the nasal auditory canal line on the face without any trouble.

FIG. 1 schematically illustrates the nasal auditory canal line indicator according to the embodiment. FIG. 2 is a partially enlarged view of the vicinity of the protrusion of the first mounting portion of the nasal auditory canal line indicator according to the embodiment. FIG. 3A schematically illustrates a procedure for using the nasal auditory canal line indicator according to the embodiment. FIG. 3B schematically illustrates a procedure for using the nasal auditory line indicator according to the embodiment. FIG. 4 schematically illustrates a nasal auditory line indicator according to another form. FIG. 5 schematically illustrates a nasal auditory line indicator according to another form. FIG. 6 schematically illustrates a nasal auditory line indicator according to another form. FIG. 7 schematically illustrates a nasal auditory line indicator according to another form.

Hereinafter, embodiments according to one aspect of the present invention (hereinafter, also referred to as “the present embodiment”) will be described with reference to the drawings. However, the embodiments described below are merely examples of the present invention in all respects. Various improvements and modifications may be made without departing from the scope of the present invention. That is, in carrying out the present invention, a specific configuration according to the embodiment may be appropriately adopted.

[Configuration example]
First, one configuration example of the nasal auditory line indicator 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view schematically illustrating the nasal auditory canal line indicator 1 according to the present embodiment. Further, FIG. 2 is a partially enlarged view of the vicinity of the protrusion 22 of the first mounting portion 2 of the nasal auditory canal line indicator 1 according to the present embodiment. The nasal auditory line indicator 1 according to the present embodiment is used to show the nasal auditory canal line on the face of the subject, for example, in order to confirm the position of the occlusal plane.

As illustrated in FIG. 1, the nasal auditory line indicator 1 according to the present embodiment is attached to a pair of left and right mounting portions (2, 3) and both mounting portions (2, 3), and both mounting portions. It is provided with a string-shaped member 5 bridged between (2, 3). Hereinafter, for convenience of explanation, both mounting portions (2, 3) are also referred to as a first mounting portion 2 and a second mounting portion 3, respectively.

<Mounting part>
First, each mounting portion (2, 3) will be described. Both attachment portions (2, 3) may be appropriately configured so that they can be attached to both ears of the subject whose nasal auditory canal line is shown on the face. In the present embodiment, the nasal auditory line indicator 1 is configured in substantially the same manner as known headband type headphones so that both wearing portions (2, 3) can be worn on both ears of the subject. ..

That is, both mounting portions (2, 3) are provided with ear pad portions (21, 31) that come into contact with the target person's ear (auricle), and both ear pad portions (21, 31) are placed on the head. It is connected to both ends of the headband portion 4. Therefore, the nasal auditory canal line indicator 1 can be worn on the head of the subject in much the same manner as known headband type headphones.

Specifically, each ear pad portion (21, 31) is formed in a disk shape and is configured to be large enough to be placed on the auricle of the subject. However, the shape and dimensions of each ear pad portion (21, 31) may not be limited to such an example, and may be appropriately selected according to the embodiment. For example, each ear pad portion (21, 31) may be configured to be large enough to cover the auricle of the subject.

Further, the headband portion 4 has a length corresponding to the size of the head of the subject, and is configured to have an elastic force to the extent that both heads of the subject can be sandwiched between both ends. ing. Therefore, by wearing the headband portion 4 on the head of the subject, both ear pad portions (21, 31) can be arranged on both ears of the subject.

A cushion material may be attached to the portion of each ear pad portion (21, 31) that contacts the auricle and the portion of the headband portion 4 that contacts the head (particularly, the crown portion). Further, the headband portion 4 may have a fixed length or may be configured so that the length can be adjusted. For example, the headband portion 4 can be configured to be adjustable in length by providing a slide mechanism provided on known headphones.

Further, in the present embodiment, rod-shaped protrusions (22, 32) having rounded ends are provided at substantially the center of each ear pad portion (21, 31) in each mounting portion (2, 3). There is. Each protrusion (22, 32) is appropriately configured to be arranged in the external ear canal of each ear when each ear pad portion (21, 31) is attached to each ear of the subject.

For example, each protrusion (22, 32) may be configured to have a diameter smaller than the diameter of the ear canal of each ear and a length that can be inserted into the ear canal. Further, for example, each protrusion (22, 32) may be configured to have a length that does not insert into the ear canal of each ear and reaches the vicinity of the entrance (ear canal) of the ear canal. In this case, each protrusion (22, 32) may have a diameter smaller than the diameter of the ear canal of each ear, or may have a larger diameter.

<String-shaped member>
Next, the string-shaped member 5 will be described. As illustrated in FIG. 1, the string-shaped member 5 has a first end portion 51 and a second end portion 52, and each mounting portion (2, 52) is provided on both end portions (51, 52). It is attached to each protrusion (22, 32) of 3).

Specifically, as illustrated in FIG. 2, the string-shaped member 5 can be inserted into the protrusion 22 of the first mounting portion 2 arranged on the first end portion 51 side of the string-shaped member 5. A through hole 23 having a diameter of is provided. The string-shaped member 5 is attached to the protrusion 22 by being passed through the through hole 23 so as to be able to advance and retreat on the first end portion 51 side. Therefore, the first end portion 51 corresponds to the "one end portion" of the present invention.

On the other hand, as illustrated in FIG. 1, the second end portion 52 of the string-shaped member 5 is fixedly attached to the protrusion 32 of the second mounting portion 3. The method of fixing the second end portion 52 to the protrusion portion 32 may be appropriately selected depending on the embodiment. For example, the second end 52 may be fixed to the protrusion 32 by adhering the second end 52 to the protrusion 32 with an adhesive or the like. Further, for example, the second end portion 52 may be fixed to the protrusion 32 by connecting or sewing the second end 52 to the protrusion 32.

As a result, the string-shaped member 5 has a first portion 53 from the second end 52 to the front of the through hole 23, and a second portion 54 from the second end 52 to the first end 51 after exiting the through hole 23. It is divided into. The first portion 53 corresponds to a portion of the string-shaped member 5 that bridges between both mounting portions (2, 3), and the second portion 54 bridges between both mounting portions (2, 3). Corresponds to the part other than the existing part.

Then, in the present embodiment, as described above, the string-shaped member 5 is not fixed on the first end portion 51 side, but is passed through the through hole 23 so as to be able to advance and retreat. Therefore, by pulling the first portion 53, the length of the first portion 53 can be increased and the length of the second portion 54 can be shortened. On the other hand, by pulling the second portion 54, the length of the second portion 54 can be increased and the length of the first portion 53 can be shortened. That is, in the present embodiment, the string-shaped member 5 is passed through the through hole 23 so as to be able to advance and retreat, so that the length of the first portion 53 that bridges between both mounting portions (2, 3) can be adjusted. It is configured.

The length of the string-shaped member 5 can be appropriately set according to the embodiment as long as the first portion 53 can have a sufficient length to indicate the nasal auditory canal line of the subject. Further, at the positions where the string-shaped member 5 is attached to each of the protrusions (22, 32), both ends of the first portion 53 of the string-shaped member 5 are arranged near the lower edges of the tragus of both ears, and the first portion 53 is located. If it can be along the nasal auditory canal line, it can be appropriately set according to the embodiment.

Further, as illustrated in FIGS. 1 and 2, the second portion 54 on the side of the first end portion 51 protruding from the through hole 23 of the string-shaped member 5 has a shape larger than the diameter of the through hole 23. A retaining portion 55 is provided. As a result, even if the first portion 53 is continuously pulled, the retaining portion 55 is caught at the entrance of the through hole 23, so that the first end portion 51 of the string-shaped member 5 can be prevented from passing through the through hole 23. ..

That is, when adjusting the length of the first portion 53, it is possible to prevent the first end portion 51 from passing through the through hole 23 and the string-shaped member 5 from coming off from the first mounting portion 2. In addition, in FIGS. 1 and 2, the retaining portion 55 is provided at the first end portion 51 of the string-shaped member 5. However, the position where the retaining portion 55 is provided is not limited to the first end portion 51, and may be closer to the center than the first end portion 51.

[Material / Manufacturing method]
Next, the material and the manufacturing method of the nasal auditory line indicator 1 according to the present embodiment will be described. The material of each component may be appropriately selected according to the embodiment. For example, the materials of the ear pads (21, 31) and the protrusions (22, 32) of each mounting portion (2, 3) and the headband portion 4 are resin materials such as plastic, metal materials, wood, and cloth. Materials and the like may be used.

Further, various known threads may be used as the material of the string-shaped member 5. The material of the string-shaped member 5 is not particularly limited as long as it is string-shaped, and an elastic material such as rubber thread may be used for the string-shaped member 5, or cotton thread or the like. Such a non-stretchable material may be used for the string-shaped member 5.

Then, the nasal auditory line indicator 1 according to the present embodiment is produced in the same manner as known headphones, earmuffs, etc. by processing these materials by a known processing method such as injection molding or cutting. be able to. The processing method adopted in the manufacturing process of the nasal auditory canal line indicator 1 may be appropriately selected based on the material to be used.

The mounting portions (2, 3) and the headband portion 4 may be integrally formed or may be formed separately. Similarly, in each mounting portion (2, 3), each ear pad portion (21, 31) and each protrusion portion (22, 32) may be formed integrally or separately. When each component is formed as a separate body, for example, the components can be connected to each other by screw connection, fitting, or the like based on the physical shape of each component.

Further, the retaining portion 55 provided on the string-shaped member 5 may be formed by a member different from the string-shaped member 5, or the string-shaped member 5 may be formed without using a member different from the string-shaped member 5. It may be formed by providing a lumpy portion such as tying a knot. The method of forming the retaining portion 55 can be appropriately selected according to the embodiment.

[how to use]
Next, a method of using the nasal auditory line indicator 1 according to the present embodiment will be described with reference to FIGS. 3A and 3B. 3A and 3B schematically illustrate an example of the procedure for using the nasal auditory line indicator 1 according to the present embodiment. The usage procedure described below is only an example, and each step may be changed as much as possible.

First, as illustrated in FIG. 3A, the first portion 53 of the string-shaped member 5 is pulled to shorten the second portion 54 and make the first portion 53 longer than the nasal auditory canal line of the subject. .. Then, the headband portion 4 is expanded, and the nasal auditory line indicator 1 is attached to the head of the subject so that both ears are sandwiched between the ear pads portions (21, 31) of both wearing portions (2, 3). At this time, both protrusions (22, 32) of both mounting portions (2, 3) are arranged in the outer ear holes of both ears.

Next, as illustrated in FIG. 3B, by grasping the second portion 54 (for example, the retaining portion 55) of the string-shaped member 5 and pulling this portion, until the first portion 53 is caught on the ala of nose. , The length of the first part 53 is shortened. This completes the operation of the nasal auditory line indicator 1. As a result, both ends of the first portion 53 of the string-shaped member 5 are arranged near the lower edges of the tragus of both ears, and the central portion is arranged at the lower edge of the ala of nose. That is, as illustrated in FIG. 3B, the first portion 53 of the string-shaped member 5 can show the nasal auditory canal line on the face of the subject.

[Characteristic]
As described above, according to the nasal auditory line indicator 1 according to the present embodiment, it is easy to attach both attachment portions (2, 3) to both ears of the subject and adjust the length of the string-shaped member 5. The first portion 53 of the string-shaped member 5 can be arranged along the nasal auditory canal line by the above procedure. This makes it possible to simply show the nasal auditory canal line on the subject's face. Further, as long as each mounting portion (2, 3) does not come off from each ear, the string-shaped member 5 does not require a dentist or the like to hold the nasal auditory line indicator 1 (particularly, the string-shaped member 5) by hand. The first part 53 of the above continues to be located on the nasal auditory canal line, whereby the nasal auditory canal line can continue to be shown on the subject's face. Therefore, according to the nasal auditory line indicator 1 according to the present embodiment, the nasal auditory canal line can be simply shown on the face without any trouble.

Further, each mounting portion (2, 3) is provided with each protrusion (22, 32), and each protrusion (22, 32) is arranged in the outer ear canal of each ear. Then, the string-shaped member 5 is attached to each protrusion (22, 32). Therefore, the first portion 53 of the string-shaped member 5 can be appropriately arranged from the vicinity of the lower edge of the tragus of each ear to the lower edge of the ala of nose. Therefore, according to the present embodiment, the first portion 53 of the string-shaped member 5 can accurately indicate the nasal auditory canal line on the face of the subject. By inserting the protrusions (22, 32) into the outer ear holes, it is possible to prevent the wearing portions (2, 3) from coming off from the ears. As a result, even if the subject's face moves while performing various treatments on the subject, the nasal auditory canal line indicator 1 is prevented from being displaced from the subject's face, and the first string-shaped member 5 is used. Part 53 can continue to show the subject's nasal auditory canal line.

Further, in the present embodiment, the nasal auditory line indicator 1 is attached to the head of the subject, and the second portion 54 of the string-shaped member 5 is pulled by a simple operation, so that both attachment portions (2) of the string-shaped member 5 are attached. The length of the 3) can be adjusted so that the first portion 53 shows the nasal auditory canal line. Therefore, according to the present embodiment, it is possible to provide a nasal auditory line indicator that can be used with a simple operation.

Further, in the present embodiment, by providing the retaining portion 55, the first end portion 51 of the string-shaped member 5 passes through the through hole 23, and the string-shaped member 5 is separated from the first mounting portion 2. Can be prevented. The retaining portion 55 can be used for the operation of the second portion 54. Since the retaining portion 55 has a larger shape than the other regions of the string-shaped member 5, it is easy to grip. Therefore, by providing such a retaining portion 55 in the second portion 54, the second portion 54 can be easily pulled.

[Modification example]
Although the embodiments of the present invention have been described above, the above description is merely an example of the present invention in all respects. Needless to say, various improvements and modifications can be made without departing from the scope of the present invention. Further, with respect to each component of the nasal auditory canal line indicator 1, the component may be omitted, replaced, or added as appropriate according to the embodiment. The shape and size of each component of the nasal auditory canal line indicator 1 may be appropriately set according to the embodiment. The material of each component of the nasal auditory canal line indicator 1 may be appropriately selected according to the embodiment. For example, the following changes can be made. In the modified example described below, the same reference numerals are used for the same components as those in the above embodiment, and the description thereof is omitted as appropriate. The following modifications can be combined as appropriate.

<1>
In the above embodiment, the through hole 23 is provided in the protrusion 22. However, the arrangement of the through hole 23 is not limited to such an example, and for example, the through hole 23 may be provided in the ear pad portion 21.

Further, in the above embodiment, the through hole 23 is provided on the first mounting portion 2 side, and the string-shaped member 5 is configured so that the length of the first portion 53 can be adjusted on the first end portion 51 side. ing. However, the through hole 23 may be provided on the second mounting portion 3 side, or may be provided on both the first mounting portion 2 side and the second mounting portion 3 side. That is, the through hole 23 can be provided in at least one of both mounting portions (2, 3).

<2>
Further, in the above embodiment, by passing the string-shaped member 5 through the through hole 23 of the protrusion 22 so as to be able to advance and retreat, the length of the string-shaped member 5 can be adjusted so as to bridge between the two mounting portions (2, 3). It is configured in. However, the configuration that allows the length of the string-shaped member 5 to be bridged between the mounting portions (2, 3) is not limited to such an example, and is appropriately selected according to the embodiment. You can. For example, it may be configured as shown in FIG.

FIG. 4 schematically illustrates the nasal auditory canal line indicator 1A according to this modified example. In the nasal auditory line indicator 1A illustrated in FIG. 4, both end portions (51, 52) of the string-shaped member 5A are fixed to both protrusions (22, 32) of both attachment portions (2, 3). There is. On the other hand, near the center of the string-shaped member 5A, a slider 56 for bundling the portions extending on both the left and right sides is provided.

In the nasal auditory line indicator 1A according to this modification, the slider 56 allows the string-shaped member 5A to partially have a first portion 53 that bridges between both mounting portions (2, 3) and the string-shaped member 5. It is bundled with the second portion 57, which is a portion other than the portion that bridges between the two mounting portions (2, 3). By moving the slider 56 upward, the length of the second portion 57 can be increased and the length of the first portion 53 can be shortened. On the other hand, by moving the slider 56 downward, the length of the second portion 57 can be shortened and the length of the first portion 53 can be shortened.

Therefore, the nasal auditory canal line indicator 1A according to this modification is used as follows. That is, after the nasal auditory line indicator 1A according to this modification is attached to the head of the subject, the slider 56 is moved to the lower edge of the nose, and the first portion 53 of the string-shaped member 5A is placed on the nasal auditory canal line. The length of the first portion 53 is adjusted so that it is arranged. As a result, the first portion 53 can be arranged along the nasal auditory canal line, and the nasal auditory canal line can be shown on the face of the subject. Instead of the above embodiment, for example, by providing such a slide mechanism, the length of the string-shaped member that spans between the mounting portions may be adjustable.

<3>
Further, in the above embodiment, the string-shaped member 5 is attached to each protrusion (22, 32) of each mounting portion (2, 3) on both end portions (51, 52). However, the place where the string-shaped member 5 is attached does not have to be limited to such an example, and may be appropriately selected according to the embodiment. For example, the string-shaped member 5 may be attached to each ear pad portion (21, 31). At this time, the protrusions (22, 23) and the through hole 23 may be omitted.

<4>
Further, in the above embodiment, in order to allow both wearing portions (2, 3) to be worn on both ears of the subject, the nasal auditory line indicator 1 is configured like a known headband type headphone. There is. However, the configuration of both mounting portions (2, 3) is not limited to such an example as long as it can be worn on both ears of the subject, and may be appropriately selected according to the embodiment. For example, the nasal auditory line indicator 1 may be configured like a known earbud type, canal type, neckband type, or ear-hook type headphone. For example, the nasal auditory line indicator 1 may be configured as shown in FIGS. 5 and 6.

FIG. 5 is a front view schematically illustrating the nasal auditory line indicator 1B configured like a known canal type headphone. Further, FIG. 6 is a front view schematically illustrating the nasal auditory line indicator 1C configured like a known ear-hook type headphone.

In the nasal auditory line indicator 1B illustrated in FIG. 5, each mounting portion (2B, 3B) has a base portion (24, 34), a protrusion extending from the base portion (24, 34), and a protrusion (22, 32). It has. In this nasal auditory canal indicator 1B, each base portion (24, 34) is grasped and each protrusion portion (22, 32) is inserted into the external auditory canal of each ear, and each wearing portion (2B, 3B). Is attached to each ear.

In the nasal auditory line indicator 1C exemplified in FIG. 6, each mounting portion (2C, 3C) is provided with a hook portion (25, 35) on each ear pad portion (21, 31). In the nasal auditory canal line indicator 1C, each attachment portion (2C, 3C) is attached to each ear by hooking each hook portion (25, 35) on the outer edge of the auricle of each ear. Instead of the above embodiment, for example, both mounting portions may be configured to be worn on both ears by such a configuration. In addition, among the various forms as described above, in order to arrange the string-shaped member 5 symmetrically on each ear, it is preferable to configure the nasal auditory canal line indicator in a headband type as in the above embodiment. .. In the above embodiment, since both wearing portions (2, 3) are connected by the headband portion 4, the both wearing portions (2, 3) can be accurately arranged in both ears of the subject. Therefore, according to the above embodiment, the string-shaped member 5 can be made to extend symmetrically from both ears, whereby the nasal auditory canal line of the subject can be accurately shown.

<5>
As shown in FIG. 7, at least one of the pair of mounting portions (2, 3) of the nasal auditory canal line indicator 1 is provided with a measuring portion having a scale for measuring the position of the string-shaped member 5. You may. FIG. 7 schematically illustrates an example of the nasal auditory canal line indicator 1D according to this modified example. In the nasal auditory canal line indicator 1D according to this modification, a rod-shaped measuring portion 8 is attached to the lower end side of each mounting portion (2, 3). Each measuring unit 8 has a scale 81 for measuring the position of the string-shaped member 5 indicating the nasal auditory canal line when the nasal auditory canal line indicator 1 is attached to the subject. Except for this point, the nasal auditory line indicator 1D according to the present modification is configured in the same manner as the nasal auditory line indicator 1. According to the modification, the position of the string-shaped member 5 indicating the nasal auditory canal line can be easily specified by using the measuring unit 8. In the example of FIG. 7, the measuring units 8 are provided on both mounting portions (2, 3), but one of the measuring units 8 may be omitted.

1 ... Nasal auditory line indicator 2 ... 1st attachment part,
21 ... ear pad part, 22 ... protrusion, 23 ... through hole,
3 ... 2nd mounting part,
31 ... ear pad part, 32 ... protrusion part,
4 ... Headband part,
5 ... String-shaped member,
51 ... 1st end, 52 ... 2nd end, 53 ... 1st part, 54 ... 2nd part,
55 ... Retaining part,
1A ... Nasal hearing line indicator,
5A ... String-shaped member, 56 ... Slider, 57 ... Second part,
1B ... Nasal hearing line indicator,
2B ... 1st mounting part, 24 ... base,
3B ... 2nd mounting part, 34 ... base,
1C ... Nasal hearing line indicator,
2C ... 1st mounting part, 25 ... Hook part,
3C ... 2nd mounting part, 35 ... Hook part

Claims (3)

It is a nasal auditory line indicator for showing the nasal auditory canal line of the subject.
A pair of left and right mounting parts that can be worn on both ears of the subject,
A string-shaped member attached to both mounting portions and bridged between the both mounting portions,
With
The string-shaped member is configured so that the length spanning between the two mounting portions can be adjusted .
Each mounting portion comprises a protrusion arranged in the external ear canal of each ear.
The string-shaped member is attached to the protrusion of each mounting portion on each end side, respectively.
A through hole is provided in the protrusion of at least one of the mounting portions.
The string-shaped member is configured so that the length of the string-shaped member can be adjusted so as to extend and retreat through the through hole on one end side.
Nasal hearing line indicator. The portion of the string-shaped member on the one end side that has come out of the through hole has a shape larger than the diameter of the through hole so that the one end of the string-shaped member does not pass through the through hole. A stop is provided,
The nasal auditory line indicator according to claim 1 . At least one of the pair of mounting portions is provided with a measuring portion having a scale for measuring the position of the string-shaped member.
The nasal auditory line indicator according to claim 1 or 2 .