Open type earphone

Abstract

To provide an open type earphone which has no pressure feeling on an ear, enables peripheral environment sound to be easily heard, and has excellent sound isolation property so as to prevent a sound leak.SOLUTION: An open type earphone 1 includes: an earphone body 2 incorporating a speaker 5; an acoustic duct 3 diagonally extended from the earphone body 2 so as to be inserted to an external auditory canal 11 of an ear; and an earring 4 to be attached to an outer side surface of the acoustic duct 3. The acoustic duct 3 includes: a first communication path 6 for communication between the speaker 5 and the external auditory canal 11 of the ear; and a groove 7 for communication between atmospheric air and the external auditory canal of the ear. An inclination angle of the acoustic duct 3 with respect to the earphone body 2 is 50° to 70°. The earring 4 is constituted by integrally connecting two rings 4A, 4B made of an elastic material. One-end sides of the two rings 4A, 4B in a longitudinal direction are attached to the outer side surface of the acoustic duct 3.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an open-type earphone that can also take in surrounding environmental sounds. [Background technology]

[0002] Normally, sound vibrations transmitted by air are transmitted to the eardrum inside the ear, and the vibrations of the eardrum are transmitted to the cochlea via three ossicles inside the eardrum. The cochlea contains lymphatic fluid, and the vibrations of this lymphatic fluid are converted into electrical signals and transmitted to the auditory nerve, which the brain recognizes as sound.

[0003] Incidentally, some earphones are worn in the user's ears and reproduce sound by applying an audio signal to a speaker placed close to the ear. These earphones can be broadly divided into two types: in-ear type and in-ear (earplug) type.

[0004] Inner-ear type earphones (see, for example, Patent Document 1) are used by hooking onto a part called the concha at the entrance of the ear, and have the advantage of not feeling any pressure and making it easy to hear surrounding environmental sounds.In contrast, canal type earphones (see, for example, Patent Document 2) are used by inserting earplug-type earpieces inside the ear, and therefore have the advantage of providing high sound insulation and preventing sound leakage. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2006-222492 A [Patent Document 2] JP 2019-145962 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, inner-ear earphones have the disadvantage of low sound insulation and prone to sound leakage, whereas canal-type earphones have the disadvantage of putting a strong pressure on the ears and making it difficult to hear surrounding environmental sounds because the earpieces are inserted deep inside the ears.

[0007] The present invention has been made in consideration of the above problems, and its purpose is to provide an open-type earphone that does not feel oppressive to the ears, makes it easy to hear surrounding environmental sounds, and has high sound insulation and does not leak sound. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides an open-type earphone comprising an earphone main body with a built-in speaker, an acoustic duct extending obliquely from the earphone main body and inserted into the ear canal of the ear, and an ear ring attached to the outer surface of the acoustic duct, wherein the acoustic duct has a first communication passage that connects the speaker to the ear canal of the ear, and a second communication passage that connects the atmosphere to the ear canal of the ear, and the inclination angle of the acoustic duct with respect to the earphone main body is 50° to 70°, and the ear ring is formed by connecting and integrating two rings made of an elastic material, and one end side of the two rings in the longitudinal direction is attached to the outer surface of the acoustic duct.

[0009] The present invention also provides the above open-type earphone, wherein the ear ring is detachably attached to the acoustic duct.

[0010] The present invention also provides the above open-type earphone, wherein the length of the ear ring in the longitudinal direction is 12 to 20 mm.

[0011] The present invention also provides the above open-type earphone, wherein the inclination angle of the ear ring with respect to the acoustic duct is 60° to 100°.

[0012] The present invention also provides the above open-type earphone, wherein the length of the acoustic duct along the central axis is 5 mm to 13 mm.

[0013] The present invention also provides the above open-type earphone, wherein the second communication passage is configured by a groove formed on an outer surface of the acoustic duct. Effect of the Invention

[0014] According to the present invention, the acoustic duct is formed with a first communication passage that communicates the speaker with the ear canal of the ear, and a second communication passage that communicates the atmosphere with the ear canal of the ear, so that ambient environmental sound is introduced into the ear canal of the user's ear through the second communication passage. Therefore, the user can simultaneously hear the speaker sound introduced into the ear canal through the first communication passage and the ambient environmental sound introduced into the ear canal through the second communication passage.

[0015] In addition, in the present invention, if the speaker sound escapes into the atmosphere and causes sound leakage, it is necessary to pass through the second communication path after passing through the first communication path. Since the acoustic duct of the open-type earphone of the present invention is shaped to extend obliquely from the earphone body and be inserted into the ear canal of the ear, the path the speaker sound takes to escape into the atmosphere is long. Therefore, it is possible to prevent the speaker sound from leaking to the outside (sound leakage). In addition, since the speaker sound is reliably introduced into the ear canal through the acoustic duct, the user can clearly hear the speaker sound even in places with loud environmental sounds, and it is possible to prevent touch noise and the user's own voice from echoing.

[0016] In addition, the open-type earphone of the present invention has an ear ring attached to the outer surface of the acoustic duct. The ear ring is formed by connecting two rings made of an elastic material together, and one end side of the two rings in the longitudinal direction is attached to the outer surface of the acoustic duct. Therefore, when the open-type earphone of the present invention is worn, one end of the ear ring abuts against the tragus of the ear, and the other end abuts against the inner wall of the concha, more specifically, the inner wall of the concha, and the acoustic duct is sandwiched between the tragus of the ear and the inner wall of the concha by the ear ring. Therefore, a high wearing stability is obtained, and the acoustic duct does not press against the ear, so that the user can feel comfortable wearing it.

[0017] Therefore, with the open-type earphone according to the present invention, it is possible to enjoy only the advantages of both inner-ear type earphones and canal type earphones while eliminating the disadvantages of each of them. [Brief description of the drawings]

[0018] [Figure 1] 1 is a side view of an embodiment of an open-type earphone according to the present invention. FIG. [Diagram 2] 1 is a perspective view of an open-type earphone according to an embodiment of the present invention, seen obliquely from above. [Diagram 3] 1 is a perspective view of an open-type earphone according to an embodiment of the present invention, seen obliquely from below. [Figure 4] 1 is a top view of an embodiment of an open-type earphone according to the present invention. FIG. [Diagram 5] 1 is a front view of an open-type earphone according to an embodiment of the present invention; FIG. [Figure 6] 1 is a rear view of an open-type earphone according to an embodiment of the present invention; FIG. [Figure 7] 1 is a bottom view of an embodiment of an open-type earphone according to the present invention. FIG. [Figure 8] FIG. 1 is a cutaway side view of a modified example of an open-type earphone according to the present invention. [Figure 9]1 is a cross-sectional view of a user's ear showing a state in which a modified open-type earphone according to the present invention is in use. FIG. [Figure 10] FIG. 2 is a diagram showing the names of each part of the auricle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of an open-type earphone 1 according to the present embodiment. FIG. 2 is a perspective view of the open-type earphone 1 according to the present embodiment, seen obliquely from above. FIG. 3 is a perspective view of the open-type earphone 1 according to the present embodiment, seen obliquely from below. FIG. 4 is a view of the open-type earphone 1 according to the present embodiment, seen from above. FIG. 5 is a view of the open-type earphone 1 according to the present embodiment, seen from the front. FIG. 6 is a view of the open-type earphone 1 according to the present embodiment, seen from the rear. FIG. 7 is a view of the open-type earphone 1 according to the present embodiment, seen from below.

[0020] 8 and 9 show a modified example of the open-type earphone 1 according to the present embodiment. FIG. 8 is a cutaway side view of a modified example of the open-type earphone 1 according to the present embodiment. FIG. 9 is a cutaway cross-sectional view of a user's ear showing a state in which a modified example of the open-type earphone 1 according to the present embodiment is used. The modified example shown in FIG. 8 and FIG. 9 differs from the embodiment shown in FIG. 1 to FIG. 7 in the angle of the bottom surface 3A of the acoustic duct 3 and the angle at which the ear ring 4 is attached, but the other parts are configured in almost the same way as the embodiment shown in FIG. 1 to FIG. 7. When explaining the open-type earphone 1 according to the present embodiment, the parts common to the modified examples shown in FIG. 8 and FIG. 9 may be explained with reference to FIG. 8 and FIG. 9.

[0021] In the following description, the directions of the arrows shown in FIG. 1 are defined as the "front-rear" direction and the "up-down" direction, respectively.

[0022] The "up and down" direction is the direction connecting the open-type earphone 1 and the user's ear when the user wears the open-type earphone 1 in the ear, in other words, the direction in which the open-type earphone 1 is inserted into or removed from the ear. The direction from the open-type earphone 1 to the user's ear, i.e., the direction in which the open-type earphone 1 is inserted into the ear, is defined as the "down" direction, and the direction from the user's ear to the open-type earphone 1, i.e., the direction in which the open-type earphone 1 is removed from the ear, is defined as the "up" direction.

[0023] The "front-rear" direction is a direction perpendicular to the "up-down" direction, and is a direction connecting the position where the open-type earphone 1 abuts against the tragus of the user's ear and the position where it abuts against the inner wall of the concha when the user wears the open-type earphone 1 in their ear. The direction from the open-type earphone 1 toward the tragus of the ear is the "rear" direction, and the direction from the open-type earphone 1 toward the inner wall of the concha is the "front" direction.

[0024] FIG. 10 shows the names of each part of the auricle. As shown in FIG. 10, the tragus (also called the tragus) is a protrusion on the face side of the entrance of the ear canal. The outer curved part of the auricle is called the helix. The concha is composed of the cavity of the concha and the velum of the concha shown in FIG. 10. The cavity of the concha is a depression located immediately near the entrance of the ear canal. The velum of the concha is a depression located outside the cavity of the concha when viewed from the entrance of the ear canal, and is separated from the cavity of the concha by a part of the helix. The open-type earphone 1 of the present invention abuts against the inner wall of the velum of the concha. In this specification, the "inner wall of the concha" or the "inner wall of the velum of the concha" refers to the wall that forms the edge of the depression that constitutes the concha or the velum of the concha.

[0025] The open-type earphone 1 according to this embodiment includes an earphone main body 2, an acoustic duct 3, and an ear ring 4, as shown in FIGS.

[0026] The earphone main body 2 is a case body that is elliptical in plan view and long in the front-to-rear direction. The earphone main body 2 is a case body that can be separated in the top-to-bottom direction, and is configured by joining together an upper case 2A and a lower case 2B. At least a speaker 5 is built into the earphone main body 2. In addition to the speaker 5, the earphone main body 2 may also have various electronic components and circuit boards on which they are mounted built into it.

[0027] In the present invention, the earphone body is not particularly limited to this embodiment as long as it is a case body that can house a speaker. In the present invention, the earphone body may be, for example, a case body that can be separated in the front-rear direction. In addition, in the present invention, the earphone body is not limited to an elliptical shape that is long in the front-rear direction, and may have a circular shape when viewed from above, or any other shape such as a square, rectangle, or polygon.

[0028] As shown in Fig. 8, the speaker 5 is disposed in a position directly above the acoustic duct 3 inside the earphone body 2 so as not to come into contact with the user's ear. By disposing the speaker 5 in such a position, the speaker 5 does not get in the way of the ear, even if the aperture of the speaker 5 is made sufficiently large to improve the sound quality of the speaker 5. Note that, although the speaker 5 is housed horizontally inside the earphone body 2 in this embodiment, the speaker 5 may also be housed vertically.

[0029] The acoustic duct 3 is a cylindrical member that extends obliquely from the earphone body 2 and is inserted deeper than the tragus into the ear canal of the user's ear. The acoustic duct 3 is formed so as to extend from the bottom of the front end (front end) of the earphone body 2 downward and at an incline toward the rear. The inclination angle θ1 (shown in FIG. 1) of the acoustic duct 3 with respect to the earphone body 2 can be set to, for example, θ1=60°, but in the present invention, the inclination angle θ1 is not limited to this and can be set to, for example, 60°±10° (50° to 70°). If the inclination angle θ1 is 50° to 70°, the open-type earphone 1 fits more reliably in the user's ear, and higher wearing stability can be obtained.

[0030] In this embodiment, the acoustic duct 3 has a cylindrical shape and can introduce the sound of the speaker 5 into the ear canal. In the present invention, the acoustic duct is not limited to this, and may be an elliptical cylindrical shape or a polygonal cylindrical shape. The cross-sectional shape of the acoustic duct can be a shape close to the shape of the ear canal, such as a circular shape, an elliptical shape, or a semi-cylindrical shape. In addition, the acoustic duct may be configured to taper from the bottom to the tip of the earphone body, or may be configured to have a constant thickness.

[0031] In this embodiment, the bottom surface 3A of the acoustic duct 3 is formed so as to be parallel to the cross section of the acoustic duct 3, as shown in Fig. 1. Note that in the present invention, the bottom surface of the acoustic duct is not limited to this and can be at any angle, and may be formed so as to be parallel to the bottom surface of the earphone body, for example, as shown in the modified examples shown in Figs.

[0032] The length of the acoustic duct 3 is a length that can be inserted deeper than the tragus into the ear canal of the user's ear. The length from the bottom surface of the earphone body 2 to the tip of the acoustic duct 3 on the central axis of the acoustic duct 3 is not particularly limited as long as it is a length that can introduce speaker sound into the ear canal of the user's ear, but if it is, for example, 5 mm or more, the speaker sound can be reliably introduced into the ear canal of the user's ear. In addition, if the length on the central axis of the acoustic duct 3 is, for example, 8 mm or more, the speaker sound can be more reliably introduced into the ear canal of the user's ear. The length on the central axis of the acoustic duct 3 is not particularly limited, but can be, for example, 13 mm or less, which can give the user a comfortable fit without making him feel oppressive. In addition, if the length on the central axis of the acoustic duct 3 is, for example, 10 mm or less, the user can be more comfortably fitted without feeling any more oppressive.

[0033] The length of the acoustic duct in the present invention can be such that it is inserted at least 10 mm deep from the point where it contacts the tragus in the ear canal of the user's ear. With this length, speaker sound can be reliably introduced into the ear canal of the user's ear when it is attached to a standard adult ear.

[0034] In this embodiment, the earphone body 2 (upper case 2A and lower case 2B) and acoustic duct 3 are made of a hard resin such as ABS resin with high rigidity. Note that in the present invention, the earphone body and acoustic duct are not limited to this embodiment and can be made of a hard material. For example, not only ABS resin but also various resins such as polypropylene and polystyrene can be used as the hard material. Also, acoustic duct 3 may be formed integrally with the earphone body 2 (for example, lower case 2B) or may be formed separately.

[0035] Even if the acoustic duct of the open-type earphone of the present invention is made of a hard material, the earring attached to the acoustic duct is clamped between the tragus of the ear and the inner wall of the concha, so that the earphone can be stably worn. Also, the acoustic duct in the open-type earphone of the present invention does not need to completely cover the inside of the ear canal, and a gap may be formed between the acoustic duct and the inner wall of the ear canal. Therefore, the open-type earphone of the present invention does not need a member such as an earpiece that is attached to the tip of a canal-type earphone and elastically deforms to be inserted deep into the ear and fixed, so that it can provide a comfortable fit without pressing on the ear.

[0036] 8 and 9, a circular hole-shaped first communication passage 6 is formed in the axial center of the acoustic duct 3. The first communication passage 6 is a passage that connects the speaker 5 built into the earphone main body 2 with the ear canal 11 (see FIG. 9) when the open-type earphone 1 is worn by a user in the ear. The upper end of the first communication passage 6 opens into the earphone main body 2, and the lower end of the first communication passage 6 opens into the ear canal 11 of the ear.

[0037] In addition, a groove (second communication passage) 7 is formed in the longitudinal direction of the acoustic duct 3 on the outer surface of the front side (left side of FIG. 8) of the acoustic duct 3. The groove 7 is a passage that communicates the atmosphere with the inside of the ear canal 11 of the ear when the ear duct 3 is worn. As shown in FIG. 3, the groove 7 is a linear groove formed in the longitudinal direction of the acoustic duct 3 from just below the attachment position of the ear ring 4 of the acoustic duct 3 to the tip of the acoustic duct 3. By forming the groove 7, a gap that functions as a second communication passage is generated between the open type earphone 1 and the ear canal when the user wears the open type earphone 1. By forming the groove 7, the user can simultaneously hear the speaker sound that is introduced into the ear canal through the first communication passage 6 and the surrounding environmental sound that is introduced into the ear canal 11 through the second communication passage formed by the groove 7.

[0038] In the present invention, the groove can be formed at any position on the outer surface of the acoustic duct. For example, the groove may be formed from above the earring attachment position on the outer surface of the acoustic duct to the tip, or from a position close to the bottom surface of the earphone body to the tip of the acoustic duct. In addition, in the present invention, the groove may be formed on the outer surface other than the front side of the acoustic duct.

[0039] In the present invention, the second communication passage is not limited to a groove as in the present embodiment, and may be, for example, a passage formed separately from the first communication passage in the side portion of the acoustic duct. When the second communication passage is a passage formed in the acoustic duct, its upper opening may be a hole formed in the front side portion of the acoustic duct and open to the atmosphere, and its lower opening may be a hole formed in the bottom surface of the acoustic duct and open to the ear canal.

[0040] When the second communication passage is a passage formed in the acoustic duct, its upper opening can be formed at any position on the front side surface of the acoustic duct 3. The upper opening of the second communication passage may be located either below or above the earring attachment position of the acoustic duct. Also, the upper opening of the second communication passage may be formed in a position close to the bottom surface of the earphone body.

[0041] The ear ring 4 is a member formed by connecting two rings 4A and 4B made of an elastic material together, and is attached to the outer surface of the acoustic duct 3. The two rings 4A and 4B are connected together so that the ring 4B protrudes outward from the front part of the ring 4A. The ear ring 4 is attached so that the rear part of the ring 4A, which is one end side in the longitudinal direction, surrounds the outer surface of the acoustic duct 3 in the circumferential direction. The ear ring 4 is attached so that it extends forward (to the left in FIG. 1) from the acoustic duct 3. In this embodiment, the rings 4A and 4B are approximately circular, but this is not particularly limited in the present invention, and any shape surrounded by curves or straight lines may be used, for example, an ellipse or a polygon. The ear ring 4 is formed by connecting two rings 4A and 4B together, which improves the springiness of the ear ring 4 and allows it to flexibly and elastically deform according to the shape of the user's ear, thereby providing an effect of making it easy to fit any ear.

[0042] 9, when the user wears the open-type earphone 1, one end of the earring 4 abuts against the tragus 12 of the ear, and the other end abuts against the inner wall 13 of the concha. Specifically, the rear part (one end) of the ring 4A abutting against the rear side surface of the acoustic duct 3 abuts against the tragus 12 of the ear, and the tip (other end) of the ring 4B extending forward abuts against the inner wall 13 of the concha, more specifically, the inner wall of the concha. As a result, the acoustic duct 3 is clamped by the earring 4 between the tragus 12 of the ear and the inner wall 13 of the concha, and a high stability of wearing can be obtained.

[0043] The length of the ear ring 4 in the longitudinal direction, that is, the length from the part of the ring 4A attached to the acoustic duct 3 to the tip of the ring 4B protruding forward, can be set appropriately according to the size of the ear, and is not particularly limited, but can be, for example, 12 to 20 mm from the viewpoint of stability of wearing. Furthermore, if the length of the ear ring 4 in the longitudinal direction is, for example, 13 to 18 mm, the stability of wearing can be further improved.

[0044] The inclination angle θ2 of the ear ring 4 relative to the acoustic duct 3 (shown in Figs. 1 and 8) is not particularly limited, but if it is, for example, 60 to 100°, the stability of the fit can be further improved. Also, if the inclination angle θ2 of the ear ring 4 relative to the acoustic duct 3 is, for example, 60 to 90°, the stability of the fit can be further improved. For example, the inclination angle θ2 may be approximately 90° as shown in Fig. 1, or may be less than 90° as shown in the modified example of Fig. 8.

[0045] The ear ring 4 may be detachable from the acoustic duct 3, or may be configured as one unit with the acoustic duct 3. If it is detachable, it may be configured so that it can be attached to the acoustic duct 3 by fitting the inner circumferential side of the ring 4A into a mounting position on the rear side of the acoustic duct 3. In the present invention, the ear ring is not limited to the above-mentioned embodiment, and may be configured so that a hole having approximately the same shape and size as the cross section of the acoustic duct is formed in the inner circumferential part of the ring 4A, and it can be attached to the acoustic duct by fitting the acoustic duct through the hole.

[0046] In the present invention, when the ear ring is removable, a plurality of different sizes of ear rings can be provided, allowing the user to select an ear ring of an appropriate size according to the size of their own ears.

[0047] The position where the earring 4 is attached to the acoustic duct 3 can be any position between the bottom surface of the earphone body 2 and the tip of the acoustic duct 3. In the acoustic duct 3, the length from the front end of the earphone body 2 to the earring 4 attachment position and the length from the earring 4 attachment position to the tip of the acoustic duct 3 are not particularly limited, but if they are, for example, 1:9 to 9:1, the open-type earphone 1 can be securely fitted to the user's ear. In the acoustic duct 3, the length from the front end of the earphone body 2 to the earring 4 attachment position and the length from the earring 4 attachment position to the tip of the acoustic duct 3 are preferably 2:3 to 2:5, which allows the open-type earphone 1 to be more securely fitted to the user's ear.

[0048] The earring 4 is made of an elastic material, i.e., a material that can be elastically deformed. The earring 4 can be made of, for example, soft silicone, elastomer, rubber, or the like.

[0049] Note that while the above describes the configuration of the open-type earphone 1 that is worn in one (left or right) ear of the user, the configuration of the open-type earphone 1 that is worn in the other (right or left) ear is exactly the same as or symmetrical to that of the other, so illustrations and descriptions thereof are omitted.

[0050] Here, FIG. 9 shows a state in which the open-type earphone 1 according to this embodiment is worn on the user's ear. The open-type earphone 1 is worn in a direction in which the rear end of the ear ring 4 (ring 4A) abuts against the tragus (tragus) 12 of the ear. That is, the acoustic duct 3 is inserted into the ear canal 11 of the ear, and the open-type earphone 1 is worn on the user's ear, and at this time, the rear end of the ear ring 4 (ring 4A) abuts against the tragus 12 of the ear. Then, the ear ring 4 is pressed by the tragus 12, and the front end of the ear ring 4 (ring 4B) is pressed against the inner wall 13 of the concha, more specifically, the inner wall of the concha, and the ring 4B is elastically deformed and bent into an arc shape. As a result, the ear ring 4 is sandwiched between the tragus 12 of the ear and the inner wall 13 of the concha, and the acoustic duct 3 is stably sandwiched between the tragus 12 of the ear and the inner wall 13 of the concha by the ear ring 4. Therefore, the open-type earphone 1 is securely attached to the user's ear and fits snugly in the user's ear.

[0051] As shown in Fig. 9, in the open-type earphone 1 of this embodiment, the acoustic duct 3 is sandwiched between the tragus 12 of the ear and the inner wall 13 of the concha by the earring 4, so that the acoustic duct 3 can be made of a hard material and can be made thinner than the ear canal. Therefore, unlike conventional earplug-type earphones that are worn by inserting earpieces or the like attached to the acoustic duct into the ear, the acoustic duct 3 does not press against the ear canal 11. That is, the acoustic duct 3 can be stably held in the ear canal by the earring 4 without pressing against the inner wall of the ear canal 11. Therefore, the user can obtain a comfortable fit without feeling a sense of pressure.

[0052] As described above, when the open-type earphone 1 is fitted and worn on the left and right ears of the user, the sound (speaker sound) emitted from the speaker 5 is transmitted to the cochlea through the first communication passage 6 formed in the center of the acoustic duct 3 and the eardrum as shown by the arrow a in Fig. 9. The vibration of the sound transmitted to the cochlea becomes the vibration of the lymph fluid in the cochlea, which is converted into an electrical signal, transmitted to the brain via the auditory nerve, and recognized as sound. In addition, the surrounding environmental sound is transmitted to the cochlea through the eardrum through the groove 7 formed in the acoustic duct 3 as shown by the arrow b in Fig. 9, and the vibration of the lymph fluid in the cochlea is converted into an electrical signal, transmitted to the brain via the auditory nerve, and recognized as sound.

[0053] In the open-type earphone 1 according to the present embodiment, the acoustic duct 3 is formed with a first communication passage 6 that communicates the speaker 5 with the ear canal 11, and a groove 7 that communicates the atmosphere with the ear canal 11. Therefore, the surrounding environmental sound is introduced into the ear canal 11 of the user's ear through the second communication passage formed by the groove 7. Therefore, the user can simultaneously hear the surrounding environmental sound that is introduced into the ear canal 11 through the groove 7 together with the speaker sound that is introduced into the ear canal through the first communication passage 6. When the speaker sound escapes into the atmosphere, it needs to pass through the first communication passage 6 and then through the groove 7, which is the second communication passage, so that the path is long and the speaker sound is prevented from leaking to the outside (sound leakage). Furthermore, the speaker sound can be clearly heard even in places where the environmental sound is loud, and there is no touch noise or the user's own voice reverberating.

[0054] Moreover, the open-type earphone 1 according to this embodiment is clamped in a state in which the acoustic duct 3 is inserted deeper than the tragus into the ear canal of the user's ear. Therefore, the speaker sound is reliably introduced into the ear canal 11 through the acoustic duct 3, so that the user can clearly hear the speaker sound even in places with loud environmental sounds, and can prevent touch noise and the user's own voice from echoing.

[0055] Furthermore, if the ear ring 4 is configured to be detachable from the acoustic duct 3 (earphone main body 2), the ear ring 4 can be easily replaced with one that fits each part of the user's ear and the size and shape of the ear canal 11.

[0056] As a result of the above, the open-type earphone 1 according to this embodiment makes it possible to enjoy only the advantages of both inner-ear type earphones and canal type earphones while eliminating the disadvantages of each.

[0057] It should be noted that the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims and the technical ideas described in the specification and drawings. [Explanation of symbols]

[0058] 1: Open type earphones, 2: Earphone body, 2A: Upper case, 2B: Lower case, 3: Acoustic duct, 4: Ear ring, 4A, 4B: ring, 5: speaker, 6: first communication passage, 7: groove (second communication passage), 11: external auditory canal, 12: tragus, 13: inner wall of the concha

Claims

1. The earphone body has a built-in speaker, An acoustic duct that extends obliquely from the earphone body and is inserted into the ear canal; An open-type earphone having an ear ring attached to an outer surface of the acoustic duct, The acoustic duct is formed with a first communication passage that communicates the speaker with an ear canal, and a second communication passage that communicates the atmosphere with the ear canal, The inclination angle of the acoustic duct with respect to the earphone body is 50° to 70°, The ear ring is configured by connecting and integrating two rings made of an elastic material, and one end side of the longitudinal direction of the two rings is attached to the outer surface of the acoustic duct. Open type earphones.

2. The open-type earphone according to claim 1 , wherein the earring is removably attached to the acoustic duct.

3. 3. The open-type earphone according to claim 1, wherein the longitudinal length of the ear ring is 12 to 20 mm.

4. 3. The open-type earphone according to claim 1, wherein the inclination angle of the ear ring with respect to the acoustic duct is between 60° and 100°.

5. 3. The open-type earphone according to claim 1, wherein the length of the acoustic duct on the central axis is 5 mm to 13 mm.

6. The open-type earphone according to claim 1 , wherein the second communication passage is constituted by a groove formed in an outer surface of the acoustic duct.

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