Earphone

Abstract

To provide an earphone in which a driver can be arranged close to a mesh member and which can improve a user's wearing feeling when an ear chip body part is worn in an external auditory canal.SOLUTION: The earphone includes an earphone body part 15 having an external auditory canal insertion part 32 to be inserted into an external auditory canal 102 of a user, and an ear chip body part 50 to be inserted into the external auditory canal. The ear chip main body portion includes the first mesh member 57 located on the eardrum side of the user with respect to the external ear canal insertion portion, and the ear chip portion 60 including the fixed portion 61 formed on the outer peripheral side of the first mesh member, the connected portion 71 detachably connected to the outer peripheral portion of the external ear canal insertion portion, and the outer peripheral side annular portion 75 located on the outer peripheral side of the fixed portion.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to earphones. [Background technology]

[0002] Patent Document 1 discloses an earphone comprising an earphone main body (housing) and an ear tip main body (earpiece) that is detachable from the earphone main body. A driver (speaker unit) is provided inside the earphone main body. A breathable mesh member (protective net) is provided at the end of the earphone main body. The earphone is worn in the user's ear with the ear tip main body inserted into the ear canal. Sound generated by the driver passes through the mesh member, then travels through the user's ear canal and reaches the eardrum. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-145965 Summary of the Invention [Problem to be solved by the invention]

[0004] The earphone described in Prior Art Document 1 has a mesh member at the end of the earphone main body to prevent foreign matter from getting inside the earphone main body. However, providing a mesh member at the tip of the earphone main body reduces the fit when the user wears the earphone. Furthermore, in a configuration where a mesh member is provided at the tip of the earphone main body, it is possible to position the driver close to the mesh member, but positioning the driver close to the mesh member tends to increase the size of the portion of the earphone main body that is inserted into the ear canal, further reducing the fit when the ear tip main body is inserted into the ear canal.

[0005] The present invention aims to provide earphones that allow the driver to be positioned close to the mesh member and that improve the wearing comfort for the user when the ear tip main body is attached to the ear canal. [Means for solving the problem]

[0006] The earphone of the first aspect comprises an earphone main body having an ear canal insertion portion that is inserted into the ear canal of a user, and an ear tip main body that is inserted into the ear canal, wherein the earphone main body has a driver disposed in the internal space of the ear canal insertion portion, and the ear tip main body has an ear tip portion that includes a first mesh member located closer to the ear canal insertion portion than the ear canal insertion portion, a connectable portion that is detachably connected to the ear canal insertion portion, an outer peripheral annular portion that is located on the outer peripheral side of the connectable portion, and a fixed portion that is located between the connectable portion and the outer peripheral annular portion and on which the first mesh member is disposed.

[0007] In the earphone of the first aspect, the driver is provided in the internal space of the ear canal insertion portion of the earphone main body, which makes it possible to position the driver close to the first mesh member.

[0008] The ear tip main body of the earphone of the first aspect has a first mesh member located closer to the eardrum than the ear canal insertion portion, and an ear tip portion. The ear tip portion includes a connection portion that is detachably connected to the ear canal insertion portion, an outer peripheral annular portion located on the outer periphery of the connection portion, and a fixed portion where the first mesh member is provided and located between the connection portion and the outer peripheral annular portion. In this way, the outer peripheral annular portion covers the first mesh member and the fixed portion from the outer periphery. This improves the user's wearing stability when the ear tip main body is attached to the ear canal, and reduces the likelihood of discomfort.

[0009] In the second aspect of the earphone, in the first aspect, the ear tip main body has a frame portion that supports the first mesh member, and the frame portion has a first portion and a second portion that is located closer to the eardrum than the first portion and has a smaller diameter than the first portion, and the first mesh member is supported by the second portion.

[0010] The frame portion of the earphone of the second aspect includes a first portion and a second portion that is located closer to the eardrum than the first portion and has a smaller diameter than the first portion. In this earphone of the second aspect, the frame portion tapers toward the eardrum. This improves the fit for the user when the ear tip main body is fitted into the ear canal. Furthermore, the ear tip main body can be smoothly attached to and detached from the ear canal, and the fit of the ear tip main body in the ear canal is improved.

[0011] The third aspect of the earphone is the first aspect, wherein the earphone main body has a second mesh member provided in the ear canal insertion portion so as to face the driver from the eardrum side, and the first mesh member is positioned on the eardrum side of the second mesh member.

[0012] Compared to an earphone that does not have a second mesh member, the earphone of the third aspect can prevent foreign matter outside the earphone from moving toward the driver, effectively suppressing changes in acoustic characteristics due to the intrusion of foreign matter.

[0013] The earphone of the fourth aspect is the third aspect, wherein the average opening area of ​​the multiple first openings formed in the first mesh member is larger than the average opening area of ​​the multiple second openings formed in the second mesh member.

[0014] In the fourth aspect of the earphone, the first mesh member can prevent large foreign objects outside the earphone from moving toward the driver, and the second mesh member can further prevent small foreign objects that pass through the first mesh member from moving toward the driver.

[0015] The earphone of the fifth aspect is the earphone of the third or fourth aspect, which has a frame portion that supports the first mesh member, and the frame portion is positioned opposite the ear canal insertion portion from the eardrum side, forming a space between the first mesh member and the second mesh member.

[0016] In the earphone of the fifth aspect, a space is formed between the first mesh member and the second mesh member of the ear tip body. By providing a space between the first mesh member and the second mesh member, the first mesh member and the second mesh member do not come into contact with each other. As a result, the first mesh member and the second mesh member do not block each other's openings, and ventilation can be ensured in a stable state at all times. Furthermore, even if foreign matter adheres to the first mesh member, clogging of the openings of each mesh member can be prevented. Therefore, ventilation between the first mesh member and the second mesh member can be ensured in a stable manner, and deterioration of the acoustic characteristics of the earphone can be prevented.

[0017] The earphone described in the sixth aspect is, in the first or second aspect, such that the ear tip portion is provided with an inner annular portion located on the inner side of the outer annular portion and having the connected portion, the inner annular portion has a connecting portion connecting the fixed portion and the connected portion, and the thickness of the connecting portion is smaller than the thickness of the connected portion.

[0018] In the sixth aspect of the earphone, the thickness of the connection portion of the inner annular portion is greater than the thickness of the connecting portion. This allows the connection portion to be stably connected to the outer periphery of the ear canal insertion portion. Furthermore, because the thickness of the connecting portion is smaller than the thickness of the connection portion, it is easier to insert the ear tip body deeply into the user's ear canal, improving the user's wearing comfort. [Effects of the Invention]

[0019] According to the earphone of the present invention, the driver can be positioned close to the mesh member, improving the wearing comfort for the user when the ear tip main body is fitted into the ear canal. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 2 is a rear view of the earphone according to the embodiment, as seen from the rear. [Figure 2] FIG. 2 is a side view of the earphone according to the embodiment, seen from the left side. [Figure 3] FIG. 2 is an exploded perspective view of a portion of the earphone according to the embodiment. [Figure 4] 4 is a cross-sectional view of the earphone according to the embodiment taken along the arrow 4-4 in FIG. 2. [Figure 5] 1 is a perspective view of an ear canal insertion portion of an earphone according to an embodiment, as seen from the left side. FIG. [Figure 6] 5 is a cross-sectional view of the ear tip body taken at the same position as in FIG. 4, showing the ear tip body with the inner annular portion in a free state. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] The earphone 10 according to the embodiment will be described below with reference to the accompanying drawings. Note that the arrows FR, LH, and UP shown in each drawing indicate the front, left, and top of the earphone 10, respectively.

[0022] The illustrated earphone 10 is an in-ear type earphone, and is worn on the user's right ear. This earphone 10 is paired with an earphone worn on the left ear (not shown). The left and right earphones are symmetrical and have the same basic structure. Therefore, the following description will focus on the earphone 10 for the right ear.

[0023] The earphone 10 includes an earphone body 15 and an ear tip body 50 .

[0024] First, we will explain earphone main body 15. Earphone main body 15 has housing 17 that houses various functional parts inside. Housing 17 is formed by combining main housing 18 and front housing 30.

[0025] The main housing 18, made of hard resin, is a hollow, generally cylindrical member. As shown in FIG. 4, the right end of the main housing 18 is open. A printed wiring board 20 is fixed to the right end of the main housing 18. The printed wiring board 20 is a board on which electronic components necessary for controlling the earphones 10 are mounted. For example, these electronic components perform output control of the output signal from the driver (speaker) 35 (described later), adjustment of the sensitivity and input frequency band of the microphone 40, adjustment of the cancellation frequency band and level for noise cancellation of the microphone 40, and various controls when performing biometric authentication to identify the user 100 (see FIG. 1 , head) of the earphones 10, depending on the purpose and situation of use of the earphones 10. A battery 22, a battery cushion 23, and a battery cap 24 are provided in the internal space of the main housing 18, positioned to the left of the printed wiring board 20. Furthermore, the right end opening of the main housing 18 is detachably covered by a cover 25.

[0026] Housing rubber 27 is provided on the outer periphery of main housing 18. Housing rubber 27 is a cylindrical elastic member attached to the outer periphery of main housing 18. Housing rubber 27 has the function of reducing contact with auricle 101 when earphone 10 is worn in the ear, and the function of preventing water from entering housing 17.

[0027] 1, 2, and 4, a front housing 30 made of hard resin is fixed to close the left opening of the main housing 18. The front housing 30 has a housing main body 31 having a substantially truncated cone shape, and an ear canal insertion portion 32 that protrudes leftward (toward the eardrum) from the left end of the housing main body 31.

[0028] The ear canal insertion portion 32 is a generally cylindrical portion extending along an axis 32X (see FIGS. 3 and 4) that is generally parallel to the left-right direction. In the earphone 10, the shape (cross-sectional shape) of the ear canal insertion portion 32 is elliptical rather than circular. Both left and right ends of the ear canal insertion portion 32 are open, with the right-end opening connected to the left-end opening of the housing main body 31. That is, as shown in FIG. 4, the internal space 33 of the ear canal insertion portion 32 communicates with the internal space 34 of the housing main body 31.

[0029] As shown in FIG. 4 , a driver 35 with a cylindrical case is provided in the internal space 33 and fixed to the ear canal insertion portion 32. Furthermore, a positioning portion 36 is provided on the left end side of the ear canal insertion portion 32. The left end of the driver 35 abuts against the right side of the positioning portion 36, thereby restricting leftward movement of the driver 35 relative to the ear canal insertion portion 32. Furthermore, as shown in FIGS. 4 and 5 , a sound path A is formed between the inner circumferential surface of the ear canal insertion portion 32 and the driver 35, and the sound path A is part of the internal space 33 and extends in a direction parallel to the axis 32X. As shown in FIGS. 3 and 4 , the positioning portion 36 has an opening 37 penetrating the positioning portion 36 in the left-right direction. The opening 37 is a hole that allows the output signal (sound) from the driver 35 to pass through and reach the eardrum of the user 100. The left half of the driver 35 is located on the left side of the ear canal insertion portion 32. The driver 35 outputs, for example, not only acoustic signals but also inaudible frequency biometric authentication signals. The driver 35 is a device of known structure that includes a magnetic circuit, a diaphragm, and the like for generating an output signal within a cylindrical case.

[0030] 3, one end of a lead wire 38 is connected to the driver 35. The other end of the lead wire 38 is connected to a microphone substrate 41, which is connected to the printed wiring board 20. The microphone substrate 41 is made of a flexible printed circuit board.

[0031] As shown in FIG. 4 , the earphone main body 15 further includes a microphone 40 that acquires a response signal arriving through the opening 37 and the internal space 33 (sound path A). The microphone 40 is located near the ear canal insertion portion 32 in the internal space 34 of the housing main body 31. That is, the microphone 40 is located to the right of the driver 35 in the internal space of the front housing 30. The microphone 40 is suitable for the noise canceling function, biometric authentication function, and pulse wave detection function of the earphone 10 of this embodiment. For example, the microphone 40 is used as a noise-canceling feedback microphone that collects sounds in the ear canal, or as a vibration sensor that measures vibrations and pressure changes in audible and inaudible frequency bands in the ear canal. The microphone 40 can be, for example, a microelectromechanical system microphone (MEMS microphone) or an electret condenser microphone (ECM).

[0032] As shown in FIG. 4, the microphone 40 is mounted on a microphone board 41. The microphone board 41 is fixed to a microphone block 42 fixed to the inner surface of the housing main body 31. The microphone block 42 is a block-shaped component that supports the microphone board 41. The microphone block 42 may be formed integrally with the housing main body 31. The microphone board 41 and the microphone block 42 are provided with openings 41A and 42A. The opening 42A communicates with the sound path A. Therefore, sound (vibrations) in the ear canal 102 (see FIG. 4) of the user 100 can reach the microphone 40 through a second mesh member 47 and a first mesh member 57, which will be described later.

[0033] 4, microphone substrate 41 and microphone block 42 are fixed together with pressure-sensitive adhesive 44. Furthermore, microphone block 42 is fixed to the inner surface of housing main body 31 with pressure-sensitive adhesive 44. Pressure-sensitive adhesive 44 that fixes microphone substrate 41 and microphone block 42 together has opening 44A that communicates with openings 41A and 42A.

[0034] As shown in FIG. 5, a sound channel groove 32A extending along the axis 32X is provided on the inner circumferential surface of the ear canal insertion portion 32. FIG. 5 is a cross-sectional view of the ear canal insertion portion 32 taken along a plane passing through an ear tip attachment groove 46 (described later) and perpendicular to the axis 32X. The sound channel groove 32A is formed in a rectangular groove shape on the inner circumferential surface of the ear canal insertion portion 32, and a sound channel A is formed in the space formed between the groove 32A and the outer surface of the driver 35. As shown in FIG. 4, the sound channel groove 32A has an introduction portion 32A1 that communicates with an opening 37 formed at the left end of the ear canal insertion portion 32 and extends from the central axis of the driver 35 toward the outer periphery. The middle portion 32A2 of the sound channel groove 32A is formed in a rectangular groove shape on the inner circumferential surface of the ear canal insertion portion 32 facing the outer surface of the driver 35, and extends from the outer periphery end of the introduction portion 32A1 along a direction parallel to the axis 32X. At the right end of the sound path groove 32A, a communication portion 32A3 is formed along the inner circumferential surface of the front housing 30, and the communication portion 32A3 communicates with the opening 42A of the microphone block 42. Therefore, the sound path A extends from the opening 37 of the ear canal insertion portion 32, passes through the introduction portion 32A1, the intermediate portion 32A2, and the communication portion 32A3, to the opening 42A of the microphone block 42 fixed to the front housing 30, and reaches the microphone 40.

[0035] 3 and 4, an annular protrusion 45, which is an annular body centered on the axis 32X, is provided in the left-right center of the outer periphery of the ear canal insertion portion 32. Furthermore, an ear tip attachment groove 46, which is an annular groove centered on the axis 32X and located to the right of the annular protrusion 45, is provided in the outer periphery of the ear canal insertion portion 32. As shown in Fig. 4, the outer periphery of the annular protrusion 45 has a diameter DM1.

[0036] 3 and 4, a thin plate-like second mesh member 47 having a circular shape when viewed from the direction of the axis 32X is provided at the left end of the internal space 33 of the ear canal insertion portion 32. The second mesh member 47 is made of, for example, nylon. Furthermore, the surface of the second mesh member 47 is water-repellent. The outer periphery of the right side of the second mesh member 47 is fixed to the left side of the positioning portion 36 via double-sided tape 48 (see FIG. 3). As shown in FIG. 4, the left side of the second mesh member 47 is located to the right of the left end face of the ear canal insertion portion 32. The average opening area of ​​the numerous second openings 47A (see FIG. 3) formed in the second mesh member 47 is AD2.

[0037] Next, we will explain the ear tip main body 50. The ear tip main body 50 has a frame portion 51, a first mesh member 57, and an ear tip portion 60. The ear tip main body 50 is also called an earpiece, ear pad, or ear cap.

[0038] The frame portion 51 is an annular member that is open at both ends and is made of hard resin. The frame portion 51 includes an annular first portion 52 that forms the right end portion of the frame portion 51, and an annular second portion 53 that is located on the left side of the first portion 52. The first portion 52 and the second portion 53 are annular bodies that are centered on the axis 51X of the frame portion 51, and the second portion 53 has a smaller diameter than the first portion 52. An annular recess 54 that is annular and centered on the axis 51X is formed on the outer periphery of the left end portion of the frame portion 51.

[0039] A thin, plate-like first mesh member 57 having a circular front shape is provided on frame portion 51. First mesh member 57 is made of, for example, nylon. First openings 57A (see FIG. 3), which are multiple holes formed in first mesh member 57, have an average opening area AD1.

[0040] The ear tip portion 60 is a one-piece molded product made of an elastic material. As shown in Fig. 6, the ear tip portion 60 has a fixed portion 61, an end portion 65, an inner annular portion 70, and an outer annular portion 75. The ear tip portion 60 is made of a material that is softer than the frame portion 51. The ear tip portion 60 of this embodiment is made of silicone rubber. That is, the ear tip portion 60 of this embodiment is elastic.

[0041] 6, the fixed portion 61 is an annular body centered on the axis 61X. An end portion 65 provided at the left end portion of the ear tip portion 60 is an annular body centered on the axis 61X, and is connected to the left end portion of the fixed portion 61. An annular step portion 64 having an annular shape centered on the axis 61X is provided between the end portion 65 and the fixed portion 61. The annular step portion 64 is formed in a stepped shape that follows the shape of the annular recess 54 of the frame portion 51.

[0042] 4 and 6, the inner annular portion 70 extends rightward from the right end of the fixed portion 61. Furthermore, the outer annular portion 75 extends rightward from the left end of the fixed portion 61, passing through the end portion 65.

[0043] The inner annular portion 70 is an annular body centered on the axis 61X. As shown in FIGS. 4 and 6 , a connection portion 71 is provided at the right end of the inner annular portion 70. An annular claw portion 71a protruding toward the axis 61X is provided on the inner peripheral surface of the connection portion 71. As shown in FIG. 6 , the inner diameter of the connection portion 71 when the inner annular portion 70 is in a free state is DM2. The inner diameter DM2 is smaller than the diameter DM1 of the outer peripheral surface of the annular protrusion 45. The inner annular portion 70 further includes a connecting portion 73 that connects the fixed portion 61 and the connection portion 71. The thickness of the connection portion 71 of the inner annular portion 70 is greater than the thickness of the connecting portion 73, which is located to the left of the connection portion 71 of the inner annular portion 70. That is, the thickness of the connecting portion 73 is smaller than the thickness of the connection portion 71. The outer annular portion 75 is located on the outer peripheral side of the inner annular portion 70 and is an annular body centered on the axis 61X. The right end of the outer annular portion 75 is located to the right of the right end of the inner annular portion 70. When the outer annular portion 75 is in a free state, the inner peripheral surface of the outer annular portion 75 is located outer than the outer peripheral surface of the inner annular portion 70. When the outer annular portion 75 is in a free state, the overall shape of the outer annular portion 75 is approximately hemispherical. Furthermore, when the ear tip portion 60 is in a free state, the portion of the outer annular portion 75 located to the left of the center in the left-right direction and the end portion 65 have a shape that gradually decreases in diameter toward the left end.

[0044] The ear tip main body 50 is manufactured, for example, as follows. First, when the frame portion 51 is injection molded, the first mesh member 57 is insert-molded into the frame portion 51, producing an integrated component of the first mesh member 57 and the frame portion 51. Next, when the ear tip portion 60 is molded, the integrated component of the frame portion 51 and the first mesh member 57 is insert-molded into the ear tip portion 60. This produces a finished ear tip main body 50 in which the frame portion 51, the first mesh member 57, and the ear tip portion 60 are integrated. The frame portion 51 is made of, for example, PA66GF30, which contains polyamide and glass fiber. Furthermore, with the annular step portion 64 of the ear tip portion 60 and the annular recess 54 of the frame portion 51 in close contact with each other, the fixed portion 61 and the frame portion 51 are fixed to each other, thereby integrating the ear tip portion 60 and the frame portion 50. Furthermore, the outer periphery of the first mesh member 57 is fixed to the second portion 53 at the left end of the frame portion 51. In this way, in the ear tip body 50, the first mesh member 57 is supported by the second portion 53 of the frame portion 51.

[0045] The ear tip main body 50 is detachably attached to the earphone main body 15. The ear tip main body 50 has axes 51X and 61X that substantially coincide with the axis 32X. The frame portion 51 and the first mesh member 57 of the ear tip main body 50 are positioned to the left of the second mesh member 47. When attaching the ear tip main body 50 to the earphone main body 15, if the ear tip main body 50 is moved to the right along the axes 51X and 61X, the claw portions 71a of the connection portion 71 move to the right while elastically deforming so as to expand in diameter outward, climbing over the annular protrusion 45. When the claw portions 71a further climb over the annular protrusion 45, the connection portion 71 elastically returns slightly to the inner periphery, causing the claw portions 71a to hook onto the annular protrusion 45, and the connection portion 71 is attached to the ear canal insertion portion 32 (see FIG. 4 ). At this time, the right end surface of the first part 52 of the frame part 51 comes into contact with the left end surface of the ear canal insertion part 32, and a space 77 is formed between the second mesh member 47 and the first mesh member 57. This completes the earphone 10 having the earphone main body 15 and the ear tip main body 50.

[0046] Next, the operation and effects of the embodiment will be described.

[0047] As shown in Fig. 1, the earphone 10 according to the embodiment is worn on the pinna 101 (ear) of a user 100. Specifically, as shown in Fig. 4, the outer peripheral annular portion 75 is inserted into the ear canal 102 of the user 100 while elastically deforming, and the outer surface of the outer peripheral annular portion 75 comes into airtight contact with the inner wall of the ear canal 102. As a result, most of the ear canal insertion portion 32 and most of the outer peripheral annular portion 75 are positioned within the ear canal 102, at least the left half of the driver 35 is positioned within the ear canal 102, and the microphone 40 is positioned outside (on the right side) of the ear canal 102. When the driver 35 generates sound in this state, the sound generated by the driver 35 passes through the opening 37, the second mesh member 47, the space 77, the first mesh member 57, and the ear canal 102 to reach the eardrum of the user 100.

[0048] As described above, the driver 35 is provided in the internal space 33 of the ear canal insertion portion 32. That is, the driver 35 is closer to the first mesh member 57 than when the driver 35 is located to the right of the internal space 33 (inside the housing outside the ear canal 102). Therefore, when the ear canal insertion portion 32 is inserted into the ear canal 102, the driver 35 that generates sound can be located inside the ear canal 102. Therefore, compared to when the driver 35 is located outside the auricle 101, the sound generated by the driver 35 can reach the eardrum of the user 100 with less reduction in sound pressure.

[0049] In the earphone 10, the driver 35 is provided in the internal space 33 of the ear canal insertion portion 32, so the first mesh member 57 is positioned closer to the eardrum than the second mesh member 47, and is positioned to the left (eardrum side) of the left end face of the ear canal insertion portion 32. The first mesh member 57 is further supported by a frame portion 51 that is harder than the ear tip portion 60 and is positioned to the left (eardrum side) of the left end face of the ear canal insertion portion 32. The fixed portion 61 of the ear tip portion 60, which is made of a material more flexible than the frame portion 51, supports the frame portion 51, and the outer peripheral annular portion 75 covers the frame portion 51 and the fixed portion 61 from the outer periphery. Therefore, when the ear tip main body 50 is inserted into the ear canal 102, the outer peripheral annular portion 75 elastically deforms and comes into airtight contact with the inner surface of the ear canal 102. By stably supporting the first mesh member 57 with the frame portion 51 and covering the periphery of the frame portion 51 with the fixed portion 61, it is possible to improve the adhesion when the ear tip main body 50 is attached to the auricle 101 (ear canal 102). This improves the stability of the ear tip when attached to the user 100, and reduces the likelihood of the user experiencing discomfort. Furthermore, by improving the adhesion between the ear tip main body 50 and the ear canal 102, it is possible to reduce the gap between the ear tip main body 50 and the ear canal 102. This prevents sound from escaping between the ear tip main body 50 and the ear canal 102, ensuring that sound reaches the eardrum of the user 100 reliably. This prevents deterioration in the acoustic characteristics of the earphone 10 and ensures that wide-band acoustic characteristics are reproduced reliably.

[0050] Furthermore, when the ear tip unit 60 is in a free state, the portion of the outer circumferential annular portion 75 located to the left of the center in the left-right direction and the end portion 65 gradually decrease in diameter toward the left end (the tip of the ear tip main body 50). Furthermore, the frame portion 51 includes a first portion 52 and a second portion 53 located closer to the eardrum than the first portion 52 and having a smaller diameter than the first portion 52, forming a smaller diameter on the eardrum side. In this manner, the left end portion of the ear tip main body 50 and its surrounding portion have a shape that tapers toward the eardrum side of the user 100. Therefore, when the ear tip main body 50 is attached to the ear canal 102, the frame portion 51 is unlikely to exert excessive pressure on the inner surface of the ear canal 102. This improves the wearing comfort experienced by the user 100. Furthermore, the tapered shape of the ear tip main body 50 allows the ear tip main body 50 to be smoothly attached to and detached from the ear canal 102. Furthermore, the tapered shape of the ear tip body 50 allows the ear tip body 50 to be inserted deeper (towards the eardrum) into the ear canal 102. This increases the contact area between the ear tip 60 and the inner surface of the ear canal 102, improving the stability of the ear tip body 50 when attached to the ear canal 102.

[0051] The frame portion 51 may have a shape different from that of the embodiment as long as it tapers toward the left side (eardrum side). For example, the outer peripheral surface of the frame portion 51 may have a tapered or curved surface that gradually reduces in diameter from the right end to the left end.

[0052] Furthermore, the earphone 10 includes a second mesh member 47 and a first mesh member 57 that is located closer to the eardrum than the second mesh member 47. Therefore, compared to when the earphone 10 includes only one of the second mesh member 47 and the first mesh member 57, it is easier to prevent foreign matter in the ear canal 102 from passing through the sound path A toward the driver 35.

[0053] Furthermore, the average opening area AD1 of the plurality of first openings 57A formed in the first mesh member 57 is larger than the average opening area AD2 of the plurality of second openings 47A formed in the second mesh member 47. Therefore, the first mesh member 57 can prevent large foreign objects in the ear canal 102 from moving toward the driver 35, and the second mesh member 47 can prevent small foreign objects that have passed through the first mesh member 57 from moving toward the driver 35.

[0054] Furthermore, the surface of the second mesh member 47 is water-repellent, and therefore the second mesh member 47 can prevent moisture in the ear canal 102 from moving toward the driver 35. This moisture is, for example, sweat.

[0055] Furthermore, the first mesh member 57 exposed to the outside of the earphone 10 is more susceptible to clogging due to foreign matter than the second mesh member 47. However, the first mesh member 57 is part of the ear tip portion 60. Therefore, a new first mesh member 57 can be easily installed in the earphone 10 by replacing the ear tip portion 60 with a new one.

[0056] Furthermore, if the first mesh member 57 and the second mesh member 47 are in contact with each other, their positions (postures) may cause the openings of each mesh member to be blocked by each other. Blocking the openings of each mesh member makes it more difficult for sound generated by the driver 35 to reach the eardrum. This reduces the acoustic characteristics of the earphone 10. However, in the earphone 10 of this embodiment, the first mesh member 57 is supported by the frame 51, which is capable of abutting against the distal end of the ear canal insertion portion 32. A space 77 is formed between the second mesh member 47 and the first mesh member 57, preventing the first mesh member 57 and the second mesh member 47 from coming into contact with each other. This prevents the first mesh member 57 and the second mesh member 47 from blocking each other's openings, ensuring stable ventilation at all times. Furthermore, even if foreign matter adheres to the first mesh member 57, clogging of the openings of each mesh member is prevented. Therefore, ventilation of the first mesh member 57 and the second mesh member 47 can be stably ensured, and deterioration of the acoustic characteristics of the earphone 10 can be prevented.

[0057] Furthermore, the thickness of the connectable portion 71 of the inner annular portion 70 is greater than the thickness of the connecting portion 73. Therefore, the rigidity of the connectable portion 71 of the inner annular portion 70 is greater than the rigidity of the connecting portion 73. This allows the connectable portion 71 to be stably connected to the ear tip attachment groove 46 of the ear canal insertion portion 32. Furthermore, the thickness of the connecting portion 73, which is provided continuously from the fixed portion 61, is smaller than the thickness of the connectable portion 71. This allows the outer diameter of the connecting portion 73 to be smaller than the outer diameter of the connectable portion 71 when the connectable portion 71 is attached to the ear canal insertion portion 32. In this way, the inner annular portion 70, which is located on the inner side of the outer annular portion 75, is also configured to have a diameter that tapers toward the tip of the ear tip main body 50. This makes it easier to insert the ear tip main body 50 deeper into the ear canal 102, improving the fit for the user 100.

[0058] In the earphone 10, the outer diameter of the frame portion 51 of the ear tip main body 50 is formed to be approximately the same size (diameter) as the outer diameter of the tip of the ear canal insertion portion 32. Therefore, when the connection portion 71 is attached to the ear canal insertion portion 32, a shape that tapers in diameter from the connection portion 71 to the fixed portion 61 can be configured, resulting in a tapered shape. In this way, the inside of the outer peripheral annular portion 75 of the ear tip portion 60 is also configured to taper in diameter toward the tip of the ear tip main body 50, forming a space that allows the outer peripheral annular portion 75 to elastically deform when the ear tip main body 50 is inserted into the ear canal 102. Therefore, the outer peripheral annular portion 75 elastically deforms along the user's ear canal 102, making it easier to insert the ear tip main body 50 deeper into the ear canal 102, further improving the wearing comfort for the user 100.

[0059] Although the present invention has been described above based on the embodiments, the present invention can be modified in design as appropriate within the scope of the gist thereof.

[0060] For example, the first mesh member 57 may be provided by fixing the outer periphery of the first mesh member 57 directly to the fixed portion 61 without using the frame portion 51. Also, a member other than the frame portion 51 may be provided between the outer periphery of the first mesh member 57 and the fixed portion 61. [Explanation of symbols]

[0061] 10. Earphones 15 Earphone body 32 Ear canal insertion part 35 Driver (Speaker) 47 Second mesh member 47A 2nd opening 50 Ear tip body 51 Frame section 52 Part 1 53 Part 2 57 First mesh member 57A 1st opening 60 Ear tip part 61 Fixed part 70 Inner annular portion 71 Claw part (connected part) 75 Outer ring portion 77 Space 100 users 102 External auditory canal AD1 Average opening area AD2 Average opening area

Claims

1. an earphone main body having an ear canal insertion portion to be inserted into the ear canal of a user; an ear tip body portion to be inserted into the ear canal; Equipped with The earphone main body is a driver provided in the internal space of the ear canal insertion portion; The ear tip body portion is a first mesh member located closer to the eardrum of the user than the ear canal insertion portion; an ear tip portion including a connected portion detachably connected to the ear canal insertion portion, an outer peripheral annular portion located on the outer peripheral side of the connected portion, and a fixed portion located between the connected portion and the outer peripheral annular portion and on which the first mesh member is provided, Earphones.

2. the ear tip body has a frame portion that supports the first mesh member, the frame portion includes a first portion and a second portion located closer to the eardrum than the first portion and having a smaller diameter than the first portion, The earphone according to claim 1 , wherein the first mesh member is supported by the second portion.

3. the earphone main body has a second mesh member provided in the ear canal insertion portion so as to face the driver from the eardrum side, The earphone according to claim 1 , wherein the first mesh member is disposed closer to the eardrum than the second mesh member.

4. The earphone according to claim 3 , wherein an average opening area of ​​the plurality of first openings formed in the first mesh member is larger than an average opening area of ​​the plurality of second openings formed in the second mesh member.

5. the ear tip body has a frame portion that supports the first mesh member, The earphone according to claim 3 or 4, wherein the frame portion is disposed opposite the ear canal insertion portion from the eardrum side, and a space is formed between the first mesh member and the second mesh member.

6. the ear tip portion includes an inner annular portion located on the inner circumferential side of the outer annular portion and having the connection portion, the inner annular portion has a connecting portion that connects the fixed portion and the connected portion, 3. The earphone according to claim 1, wherein the thickness of the connecting portion is smaller than the thickness of the connected portion.

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