Ear mounting tool

Abstract

To provide an ear mounting tool for improving a mounting feeling of a main body part to be stored in an ear concha.SOLUTION: An ear mounting tool 91 comprises: a main body part 911 including a projection part 22 and a cylindrical part 23 extended from the projection part 22, and to be mounted on an ear concha in a use state; and an insertion part 912 mounted on the cylindrical part 23 and to be inserted to an external auditory canal in a use state. The main body part 911 includes: an inner housing 2 where the projection part 22 is formed; and a cover 3 for covering the inner housing 2. The cover 3 comprises: a first end part 31b formed by a flexible material and to be fixedly sealed on a side of the inner housing 2; a second end part 32 including a valve structure on the opposite side of the first end part 31b and having an opening part through which the cylindrical part 23 is put; and an adhesive boundary line indicating a position where the cover 3 starts contact with the projection part 22.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] Patent Document 1 describes a device for wearing an ear, such as an earplug, an earphone, or a hearing aid, that is inserted into the ear canal. The insertion part is composed of a soundproofing material and an elastic material covering the soundproofing material, and the elastic material is arranged to allow air to flow inside the elastic material. The technology described improves comfort by inserting the earplug into the ear canal, inflating it, and bringing it into close contact with the inner wall of the ear canal. There are. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-057164 Summary of the Invention [Problem to be solved by the invention]

[0004] Ear attachments generally consist of an insertion part that is inserted into the ear canal and a main part that is placed in the concha cavity of the auricle. It has a body. The ear-worn device described in Patent Document 1 improves the wearing comfort of the insertion part inserted into the ear canal. It is not intended to improve the fit of the main body that is placed in the cavity of the concha. Therefore, we have developed technology to improve the fit of the main unit, especially the feeling when pressing the main unit against the head. There is a need for technology that can achieve this.

[0005] Therefore, the problem to be solved by the present invention is to improve the wearing comfort of the main body that is placed in the cavity of the concha. To provide an ear attachment that improves hearing. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention has the following configuration. 1) A main body portion having a protruding portion and a tubular portion extending from the protruding portion, the main body portion being attached to the cavity of the concha in use; an insertion portion attached to the tubular portion and inserted into the ear canal in the use state; Equipped with the main body portion includes an inner housing in which the protrusion is formed, and a cover that covers the inner housing, The cover is an ear-worn device formed from a flexible material and has a first end that is sealed and fixed to the inner housing, a second end on the opposite side to the first end that has a valve structure and an opening through which the tubular portion is inserted, and a sealing boundary line that indicates the position where the cover begins to contact the protrusion. [Effects of the Invention]

[0007] According to one aspect of the present invention, there is an advantage that the wearing comfort of the main body that is placed in the cavity of the concha is improved. The results are obtained. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a state in which an earplug 91 of Example 1 of an ear wearing device according to an embodiment of the present invention is worn on the right auricle E. FIG. [Figure 2] FIG. 2 is a perspective view of the earplug 91. As shown in FIG. [Figure 3] FIG. 3 is an assembly diagram of the main body 911 of the earplug 91. As shown in FIG. [Figure 4] FIG. 4 is a partial cross-sectional view of the main body portion 911 taken along the line S4-S4 in FIG. [Figure 5] FIG. 5 is a cross-sectional view taken along the line S5-S5 in FIG. [Figure 6] Figure 6 is a cross-sectional view of the earplug 91 of Example 1, taken along the S6-S6 line in Figure 2. Figure 6(a) is a longitudinal cross-sectional view of the earplug 91 in the normal position on the auricle E, and Figure 6(b) is a longitudinal cross-sectional view of the earplug 91 during one step of inserting it into the auricle E. [Figure 7]Figure 7 is a cross-sectional view of earplug 91B of Example 2, where Figure 7(a) is a longitudinal cross-sectional view of earplug 91B in the normal state when worn on the auricle E, Figure 7(b) is an enlarged partial view of Figure 7(a), and Figure 7(c) is a longitudinal cross-sectional view of one process of wearing earplug 91B on the auricle E. [Figure 8] 8A and 8B are cross-sectional views of an earplug 91C according to a third embodiment, with FIG. 8A being a longitudinal cross-sectional view of the earplug 91C in the auricle E in a normal wearing state, and FIG. 8B being a plan view of the filter member 5 used in the valve structure BK3. [Figure 9] FIG. 9 is a partial perspective view showing the inner housing 2D of the valve structure BK4 of the earplug 91D of the fourth embodiment. [Figure 10] FIG. 10 is a cross-sectional view of an earplug 91D according to the fourth embodiment. [Figure 11] FIG. 11 is a partial perspective view of an earplug 91E according to the fifth embodiment. [Figure 12] FIG. 12 is a cross-sectional view of an earplug 91E according to the fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] The ear wearing device according to the embodiment of the present invention is the earplugs 91, 91B, 91C, and 91D of Examples 1 to 5. 1D, 91E.

[0010] Example 1 An outline of the earplug 91 of the first embodiment will be described with reference to FIGS. The earplug 91 described below is for the right ear, and the left earplug has a symmetrical shape from front to back. Therefore, the front, back, up, down, left and right directions are defined as the directions of the arrows shown in FIGS. The up-down direction is the top-to-bottom direction when the wearer of the earplugs 91 is in an upright position, and the front-to-back direction is the front-to-back direction of the head. The left and right directions correspond to the left and right directions of the head.

[0011] The earplug 91 includes a main body 911 that is accommodated in the cavity of the concha Eb when attached to the auricle E, and a main body The earpiece 910 has an insertion portion 912 that projects from the earpiece 911 and is inserted into the ear canal. The insertion part 912 is made of silicone rubber or the like and has elasticity. , and is detachably attached to the main body portion 911. The state in which the earplug 91 is attached to the auricle E is also referred to as the in-use state.

[0012] As shown in FIG. 2, the main body 911 includes a base 911a, a protruding portion 911b, and a locking projection. It has an outlet 911c. The base portion 911a has an ellipsoid shape obtained by flattening an oval into a three-dimensional shape. The protrusion 911b is biased toward the rear side of the surface facing the cavity of the concha Eb when the device is attached to the auricle E. At this position, the rear end is formed to protrude diagonally downward to the left. The locking protrusion 911c is inserted from the end of the protrusion 911b in the protruding direction to the protrusion 911b. It protrudes with a small diameter along the axial direction. The insertion portion 912 is elastically locked to the locking protrusion 911c.

[0013] In the state where the earphone is attached to the auricle E shown in FIG. 1, the insertion portion 912 (not shown) is inserted into the ear canal. The base 911a of the main body 911 is accommodated in the cavity of the concha Eb. The side of the ear enters between the cavity of the concha Eb and the tragus Ec, and the rear side of the ear enters through the cavity of the concha Eb. The earplug 91 penetrates the inside of the antihelix Ea, which protrudes to cover the ear. The earphone will be stably attached as long as no excessive external force is applied to the auricle E in the direction of removal.

[0014] The main body 911 is configured to include the components shown in FIG. The device 1 includes an outer housing 1, an inner housing 2, and a cover 3. The outer housing 1 and the inner housing 2 are made of hard resin, such as PC. (Polycarbonate). The cover 3 is made of a flexible material, such as elastomer or silicone. Examples include Ngom.

[0015] FIG. 4 is a partial cross-sectional view of the main body portion 911 taken along the line S4-S4 in FIG. As shown in FIG. 4, the outer housing 1 has a substantially flat bottom wall 1a and a circular groove extending around the entire outer edge of the bottom wall 1a. and an outer peripheral wall portion 1e that curves and rises from the outer peripheral wall portion 1e. The outer peripheral wall 1e has a stepped portion 1d on the inner edge of the left end face that is carved out all around toward the right. do. At a position on the bottom wall 1a spaced inward from the outer peripheral wall portion 1e, a lower An inner rib 1b that protrudes leftward at a height is formed around the entire periphery.

[0016] As shown in FIGS. 3 and 4, the inner housing 2 faces the bottom wall 1a of the outer housing 1. and an engaging protrusion 21d that protrudes rightward along the entire periphery near the periphery of the base 21d. 1b and The peripheral edge of the base portion 21d is an outer flange portion 21a that protrudes outward from the engaging protrusion portion 21b. are. A cylindrical protrusion 22 protruding diagonally downward and rearward to the left is formed at a position biased toward the rear of the base 21d. From the tip end surface of the protrusion 22, a portion smaller than the protrusion 22 is formed along the axis of the protrusion 22. The cylindrical portion 23 having a diameter of 1 / 4 is formed extending therefrom. 1c is this cylindrical portion 23.

[0017] As shown in FIG. 4, the outer housing 1 and the inner housing 2 are connected to each other by the outer periphery of the outer housing 1. The engaging protrusion 21 of the inner housing 2 is fitted into the peripheral recess 1c, which is a recess between the wall 1e and the inner rib 1b. b can be inserted and engaged to be combined. When the outer housing 1 and the inner housing 2 are assembled together, the peripheral step 1 of the outer housing 1 is The peripheral step portion 21d and the peripheral step portion 21c of the inner housing 2 face each other with a gap in the left-right direction.

[0018] As shown in FIGS. 3 and 4, the cover 3 has the same outer shape as the outer housing 1. The cover base 31 is located at the middle in the left-right direction, and the cover base 31 is located at the rear of the cover base 31. and a cylindrical protruding portion 32 that protrudes diagonally downward toward the left rear and has a bottomed cylindrical shape. An opening 34 is formed in a shoulder portion 32b that serves as a wall that closes the end of the tube of the cylindrical protrusion 32. The inner diameter of the opening 34 is larger than the outer diameter of the cylindrical portion 23 of the inner housing 2 .

[0019] As shown in FIG. 4, the cover base 31 has a periphery that protrudes inward along the entire periphery. and a peripheral rib 31 protruding rightward from the inner edge of the inner flange 31a along the entire periphery. The circumferential rib 31b is the first end portion on the right side in the left-right direction. The portion 32 is a second end portion on the opposite side of the first end portion with the intermediate portion (cover base portion 31) interposed therebetween. The circumferential rib 31b is formed when the outer housing 1 and the inner housing 2 are combined. The outer periphery is sandwiched between the stepped portion 1d and the stepped portion 21c. The housing 1 and the inner housing 2 are assembled in close contact with each other with the cover base 31 sandwiched therebetween. It is now possible to do so.

[0020] The main body 911 of the earplug 91 is made up of an outer housing 1 and an inner housing 2, and is attached to the cover base 31. The circumferential rib 31b is sandwiched between the two pieces and integrated by welding or bonding. In this case, the peripheral rib 31b is located in the gap between the peripheral step 1d and the peripheral step 21c on the inner housing 2 side. It is clamped and sealed in place. The main body 911 is an integrated body formed by sandwiching the cover 3 between the outer housing 1 and the inner housing 2. In a natural state where no external force is applied, the cylindrical portion 23 of the inner housing 2 is inserted into the opening 34 of the cover 3. is inserted. In a natural state, the cover base 31 of the cover 3 is spaced to the left from the base 21d of the inner housing 2. That is, in a natural state, there is a space between the cover base 31 and the base 21d. An air chamber V is formed.

[0021] The range in which the air chamber V is formed is shown in FIG. 5, for example. FIG. 5 is a view from the left side at a position slightly to the left of the base 21d of the inner housing 2. 5 is a cross-sectional view of the air chamber V at the S5-S5 position in the base 9. It is formed over a wide area corresponding to the outer shape of 11a. The cover 3 is made of a material with some stiffness, and the shape of the air chamber V is maintained well in the natural state. be maintained.

[0022] As shown in FIG. 4, the air chamber V extends leftward along the protruding portion 22 of the inner housing 2. In a natural state, the cover 3 is in close contact with the tip of the protrusion 22. In the natural state, the left end of the air chamber V is located near the tip of the protrusion 22, and the cover 3 is attached to the protrusion. This is the boundary position that is closely aligned with 22. The cover 3 has an inner flange 31a of the cover base 31 at the right end thereof, which is connected to the inner housing 2 and the outer housing 1 and sealed.

[0023] The tip end portion of the cylindrical protrusion 32 including the opening 34 in the cover 3 and the inner housing 2 are These cooperate to form a valve structure BK that controls the flow of air inside the air chamber V in and out of the external space. That is, the earplug 91 has an air chamber V and a valve structure BK that controls the flow of air in and out of the air chamber V. do.

[0024] This valve structure BK will be described with reference to FIG. 6(a). FIG. 6(a) is a vertical cross-sectional view of the protruding portion 911b of the main body portion 911, and specifically, FIG. 1 is a cross-sectional view taken along the line S6-S6 in FIG.

[0025] The protruding portion 22 of the inner housing 2 includes a cylindrical portion 22a extending cylindrically about an axis line CL22, A top wall portion 22t that is substantially perpendicular to the axis CL22 and substantially closes the cylinder, and a top wall portion 22t that is substantially perpendicular to the axis CL22 and .... and a shoulder portion 22b that curves smoothly and connects the edge of the 2t. When the earplug 91 is in its natural state, the cover 3 is in contact with the protrusion 22 of the inner housing 2, and the top wall 22t the outer surface 22t1 of the shoulder portion 22b and the tip side portion of the outer surface 22b1 of the shoulder portion 22b (the contact boundary line in FIG. 6) It is attached so that it fits tightly to the tip of the LN1. The contact boundary line LN1 is a line indicating the position where the cover 3 starts to come into contact with the protrusion 22.

[0026] Specifically, the inner surface of the cylindrical protrusion 32 of the cover 3 is in contact with the protrusion 22 of the inner housing 2. The outer surface of the cylindrical protrusion 32 is formed in the same shape as the outer surface of the tip end side of the boundary line LN1. a is in close contact with the cylindrical portion of the protrusion 22 at the contact boundary line LN1, and the shoulder 3 of the cylindrical protrusion 32 2b is in close contact with the shoulder 22b of the protrusion 22. As a result, in the earplug 91, the valve structure BK is in a closed state in the natural state, and the air chamber V is sealed. This prevents the air inside from leaking out.

[0027] The opening 34 of the cover 3 is concentric with the cylindrical portion 23 of the inner housing 2 and has an outer diameter larger than that of the cylindrical portion 23. Therefore, the base of the cylindrical portion 23 and the end face of the opening 34 A gap F1 of a distance D1 in the radial direction is formed between them.

[0028] When inserting the earplug 91 having this valve structure BK into the auricle E, the user presses the main body 9 11, and insert the insertion portion 912 into the ear canal while placing the main body portion 911 in the cavity of the concha Eb. Press down as if When the main body 911 is pressed against the cavity of the concha Eb, the cover base 31 of the cover 3 is pressed against the cavity of the concha Eb. The elastic member 21 is pressed against the surface of the cavity of the concha Eb and the distance between the inner housing 2 and the base 21d is shortened. This causes the air chamber V to compress. As the compression progresses and the air pressure inside the air chamber V rises and exceeds a certain pressure, the valve structure B K opens and the air in the air chamber V is discharged to the outside. This state is shown in FIG. 6(b).

[0029] As shown in Figure 6(b), when the internal pressure of the air chamber V increases and reaches a predetermined value, the cover 3, the cylindrical protrusion 32 of the inner housing 2 is pushed open against the elastic repulsive force of that portion. That is, the cylindrical protrusion 32 is expanded and deformed to form the air passage fa. will be done. The air passage fa connects the air chamber V and the outside space Vg through the opening 34. As a result, the air inside the air chamber V is discharged to the outside through the air passage fa, and the pressure in the air chamber V drops. do.

[0030] The earplug 91 has a valve structure BK, so that when the earplug 91 is attached to the auricle E, or When the main body 911 of the earplug 91 is pressed against the cavity of the concha Eb in the worn state, The burden is reduced. Specifically, when the main body 911 is pressed against the cavity of the concha Eb, the air chamber V is compressed. Since the cavity of the concha is closed and there is no way for air to escape, it shrinks elastically. Since an elastic repulsive force is applied between the air chamber V and the cover 3, the contact feeling of the main body 911 is soft. It's good.

[0031] When the main body 911 is pressed further firmly against the cavity of the concha Eb, the pressure in the air chamber V reaches a predetermined value. When the pressure reaches the limit, the valve structure BK opens, gradually discharging the air inside the air chamber V to the outside, reducing the air chamber V. As a result, the repulsive force exerted on the cavity of the concha Eb is The decrease is gentle without becoming excessive, and the touch feeling of the main body 911 is maintained in a good condition. do.

[0032] When the earplug 91 is attached to the auricle E, the cover 3 is attached to the periphery of the valve structure BK. The entire direction is not uniformly in contact with the inner wall of the auricle E. Therefore, the airway fa is It is not formed in the entire circumference, but in the area where there is a gap between the cover 3 and the inner wall of the ear E. To exhaust the pressurized air in the air chamber V, an air passage fa is formed in a part of the circumferential direction. It is sufficient if

[0033] The earplug 91 is removed from the auricle after a certain time has passed or when the air passage fa is formed. When this happens, the air chamber V is crushed by the restoring force of the cover 3 trying to return to its original shape. At this time, as long as the deformation of the shoulder portion 32b remains, the air passage fa is maintained and the opening Air flows into the air chamber V from the portion 34. When the cover 3 returns to its original shape, the air passage fa is blocked. The air chamber V is again sealed.

[0034] When the earplug 91 is attached to the auricle E, the main body 911 is pressed firmly against the cavity of the concha Eb. As a usage mode, the user is in a lateral position with the earplugs 91 in place and the head resting on a pillow. In this embodiment, the earplugs 91 are pressed against the head by a pillow. In this embodiment, the earplug 91 has an air chamber V and a valve structure BK, so that the main body 911 The earphones come into soft contact with the cavity of the concha Eb, providing a comfortable fit for the user.

[0035] Example 2 Next, an earplug 91B of Example 2 will be described. The earplug 91B has the following features in comparison with the earplug 91 of Example 1: The valve structure BK2 is installed instead of the valve structure BK, but the other parts are the same. The valve structure BK2 will now be described with reference to FIGS. 7(a) to 7(c). FIG. 7 is a cross-sectional view of the vicinity of the shoulder portion 22b of the inner housing 2 for explaining the valve structure BK2. 7(a) is a longitudinal cross-sectional view of the earplug 91B in a normal state attached to the auricle E, and FIG. 7(b) is a longitudinal cross-sectional view of the earplug 91B in a normal state attached to the auricle E. 7(a) is a partially enlarged view, and FIG. 7(c) is a partial view of the earplug 91B being attached to the auricle E. FIG.

[0036] As shown in Figures 7(a) and 7(b), the valvular structure BK2 is a cover 3 of the valvular structure BK. Instead, a cover 3B is provided. The side portions 32a and shoulder portions 32b of the cover 3B are inwardly facing in a natural state. The protrusion 22 of the housing 2 is spaced apart to form a gap F2 around the entire periphery. It has been done. As a result, the valve structure BK2 has a passage between the cover 3B and the protruding portion 22 that communicates with the air chamber V. It has an airway fb.

[0037] The shoulder portion 32b of the cover 3B has a diameter slightly smaller than the outer diameter of the cylindrical portion 23 of the inner housing 2. The opening 34B has a small inner diameter. The peripheral edge of the opening 34B is thin and easily bent. The flap portion 35 is a ring-shaped flap that can be bent. In this example, the flap is made of two pieces. The flap 35a is made of thin inner and outer flaps 35b that are spaced apart in the thickness direction. The number of cards is not limited.

[0038] The inner flap 35a and the outer flap 35b are arranged such that the periphery of the opening 34 is in a natural state. 3, separating the space on the ventilation path fb side from the outside space Vg. The inner flap 35a and the outer flap 35b separate the space on the ventilation path fb side of the opening 34B from the outer space. When a predetermined pressure difference occurs between the temperature sensor and the temperature sensor Vg, ventilation is permitted in the direction that reduces the pressure difference. The tubular portion 23 is bent in this manner, forming a gap between the tubular portion 23 and the outer wall thereof. The grooves may not be formed along the entire circumference of the wall, but may be formed along a portion of the circumference.

[0039] When the earplug 91 is attached to the auricle E, the cover 3B is pressed against the cavity of the concha Eb, and the air chamber V is formed. When the pressure in the air chamber V rises, the inner flap 35a and the outer flap 35b move in the direction of the arrows in FIG. As shown in c), the pressurized air in the air chamber V is discharged to the outside space Vg as an airflow ARb. It transforms so that it can be used.

[0040] When the earplug 91 is removed from the earlobe E in a state where the cover 3B is pressed and the air chamber V is deformed, The air chamber V of bar 3B expands from its collapsed state due to the restoring force that tries to return it to its original shape. As a result, the inner flap 35a and the outer flap 35b move from the outer space Vg to the air chamber V It deforms to allow air to flow into the When the cover 3B returns to its original shape, the pressure difference between the air chamber V and the external space Vg becomes small. Then, the inner flap 35a and the outer flap 35b are again brought into close contact with the cylindrical portion 23, and the air chamber V is again sealed. It becomes closed.

[0041] The earplug 91B has the valve structure BK2, so that when the earplug 91B is attached to the auricle E, Alternatively, when the main body 911 of the earplug 91B is pressed against the cavity of the concha Eb while the earplug is being worn, Reduces strain on the head. In detail, when the main body 911 is pressed against the cavity of the concha Eb, the air chamber V is compressed. Until a predetermined pressure difference occurs between the air chamber V and the outside space Vg, the air chamber V is kept sealed and the air is discharged. As a result, the air chamber V contracts elastically. The added repulsive force makes the touch feel softer and more comfortable.

[0042] The main body 911 is pressed even more strongly against the cavity of the concha Eb, and the pressure inside the air chamber V increases further. When a predetermined pressure difference occurs between the inner flap 35a of the valvular structure BK2 and the outer space Vg, The flap 35b opens to discharge the air inside the air chamber V to the outside, so that the pressure inside the air chamber V is reduced. Accordingly, the repulsive force applied to the cavity of the concha Eb is strong even when the main body 911 is pressed strongly. However, the amount of saturation is reduced without becoming excessive, and the touch feeling is maintained well.

[0043] When the earplug 91B is attached to the auricle E, the main body 911 is pressed firmly against the cavity of the concha Eb. The possible usage mode is the usage mode (lateral position) described as an example in the explanation of the first embodiment. In this case, the earplug 91B has the air chamber V and the valve structure BK2, so that the main body 911 is It comes into soft contact with the turbinate cavity Eb, improving the wearing comfort.

[0044] Example 3 Next, an earplug 91C of Example 3 will be described. The earplug 91C differs from the earplug 91 of Example 1 in that: It is equipped with valve structure BK3 instead of valve structure BK, but other parts are the same, so The details are omitted. The valve structure BK3 will be described with reference to FIGS. 8(a) and 8(b). FIG. 8 is a view showing the vicinity of the shoulder portion 22b of the inner housing 2 for explaining the valve structure BK3 of the third embodiment. 8(a) is a longitudinal cross-sectional view in the normal installation state, and FIG. 8(b) is a cross-sectional view in the valve structure BK3. FIG. 2 is a plan view of the filter member 5 used.

[0045] As shown in FIG. 8(a), the valve structure BK3 has a cover in place of the cover 3 of the valve structure BK. 3C, and further includes a filter member 5. The side portion 32a and shoulder portion 3 of the cover 3C 2b is formed so as to be spaced apart from the protruding portion 22 of the inner housing 2 in a natural state. As a result, a gap F3 is formed between the cover 3B and the protruding portion 22, and the flap 24 is inserted into this gap F3. A filter member 5 is interposed.

[0046] As shown in FIG. 8(b), the filter member 5 is formed in the gap between the cover 3C and the protrusion 22. In the space F3, a generally bowl-shaped portion is formed so as to fit closely to both the cover 3C and the protruding portion 22. An opening 5a is formed in the center of the bowl-shaped bottom of the filter member 5, through which the cylindrical portion 23 can be inserted. There are. The filter member 5 is made of a material that allows air to pass through while experiencing resistance. The filter member 5 is a ventilation resistor. An example of the material for the filter member 5 is a porous material such as urethane foam. It is a quality material.

[0047] In this way, the valve structure BK3 has a filter member 5 between the air chamber V and the outer space Vg. The filter member 5 allows air to pass between the air chamber V and the outside space Vg with resistance. It functions as an airway fc. Therefore, when the earplug 91C is placed in the cavity of the concha Eb, the cover 3C abuts against the cavity of the concha Eb. Even if the air chamber V is compressed and deformed by being pressed in this state, the air in the air chamber V will Since the air is exhausted to the outer space Vg over a longer period of time, the air chamber V elastically contracts slowly. As a result, an elastic repulsive force corresponding to the compressive deformation of the air chamber V is applied to the cavity of the concha Eb from the cover 3. This gives a soft and pleasant feel to the touch.

[0048] The valve structure BK3 of the earplug 91C is such that the earplug 91C fits into the auricle when the cover 3C is pressed and deformed. When the cover 3C is removed from the cover E, the air chamber V is restored to its original shape by the restoring force of the cover 3C. The air chamber V expands from the collapsed state, and the pressure in the air chamber V decreases. flows into the air chamber V, and the cover 3C returns to its original state.

[0049] Example 4 Next, an earplug 91D of Example 4 will be described. The earplug 91D has the following features in comparison with the earplug 91 of Example 1: It is equipped with valve structure BK4 instead of valve structure BK, but other parts are the same, so The details are omitted. The valve structure BK4 will be described with reference to FIGS. FIG. 9 is a partial perspective view showing an inner housing 2D of a valve structure BK4 according to a fourth embodiment; FIG. 10 is a cross-sectional view of the vicinity of the shoulder portion 22b of the inner housing 2D for explaining the valve structure BK4. be.

[0050] The valve structure BK4 has an inner housing 2D instead of the inner housing 2 in the valve structure BK. Cover 3 is used in common. As shown in FIG. 9, the inner housing 2D has a groove 25. The groove 25 is formed on the outer surface of the protruding portion 22 and extends from the base of the cylindrical portion 23. From the shoulder 22b of the protrusion 22 to the cylindrical portion 22a, the radial direction is away from the opening 34. The groove 25 extends in the direction perpendicular to the surface of the protrusion 22 and is a thin groove recessed inward from the outer surface of the protrusion 22. Although not specified, it may be rectangular, for example.

[0051] As shown in FIG. 10, the valvular structure BK4 uses the same cover 3 as the valvular structure BK. That is, the cover 3 and the protrusion 22 are in close contact with each other except for the groove 25 in the natural state. The end of the groove 25 on the cylindrical portion 22a side, which is far from the opening 34, is the air chamber V in a natural state. or can be made to communicate by the expansion and deformation of the cover 3. On the other hand, the end of the groove 25 on the cylindrical portion 23 side is visible from the outside through the opening 34 of the cover 3. That is, the air chamber V and the outer space Vg are connected by the groove portion 25. The groove portion 25 has a small cross-sectional area as the ventilation path fd, and the air chamber V and the outside air A large resistance occurs to the airflow between the gap Vg.

[0052] In this way, the valve structure BK4 has the groove portion 25, and the groove portion 25 is a communication portion between the air chamber V and the outer space Vg. The air passage fd allows air to pass through with a large resistance. Therefore, when the earplug 91D is placed in the cavity of the concha Eb, the cover 3 abuts against the cavity of the concha Eb. Even if the air chamber V is compressed and deformed by being pressed in a closed state, the air in the air chamber V passes through the groove portion 25. Due to the large resistance, the air is not immediately exhausted to the outside space Vg, and the air chamber V maintains a pressurized state for a certain period of time. It shrinks elastically and slowly. This gives elastic repulsive force to the cavity of the concha Eb, making the contact feel softer and more comfortable. That's good.

[0053] The valve structure BK4 of the earplug 91D is such that when the cover 3 is pressed and deformed, the earplug 91D fits into the auricle E. When the cover 3 is removed from the seat, the air chamber V is crushed by the restoring force of the cover 3 trying to return to its original shape. As a result, the air chamber V is expanded from the closed state, and the air chamber V is decompressed. The air gradually flows into the cover, and Cover 3 returns to its original state.

[0054] Example 5 Next, an earplug 91E of Example 5 will be described. The earplug 91E differs from the earplug 91 of Example 1 in that: It is equipped with valve structure BK5 instead of valve structure BK, but other parts are the same, so The details are omitted. The valve structure BK5 will be described with reference to FIGS. FIG. 11 is a partial perspective view showing an illustrative inner housing 2E of the valve structure BK5. FIG. 12 is a cross-sectional view of the vicinity of the shoulder portion 22b of the inner housing 2E for explaining the valve structure BK5. FIG.

[0055] The valve structure BK5 has an inner housing 2E instead of the inner housing 2 in the valve structure BK. do. As shown in FIG. 11, the inner housing 2E has a groove group 26 formed therein relative to the inner housing 2. The groove group 26 is made up of a plurality of grooves (two grooves in this example) with different extension lengths. 11, the groove group 26 includes a long groove portion 261 and a short groove portion 262. are provided on the outer surface of the protrusion 22 of the inner housing 2E at a pitch of 45° around the axis CL22. It has four long grooves 261 and four short grooves 262 formed one on the other.

[0056] The long groove portion 261 extends from the base of the cylindrical portion 23 through the shoulder portion 22b of the protruding portion 22 to the cylindrical portion 22a. Extending radially away from the opening 34 and recessed inwardly from the outer surface of the projection 22 It is a thin groove. On the other hand, the short groove portion 262 is a groove that extends from the base of the cylindrical portion 23 to the shoulder portion 22b of the protruding portion. , extending away from the radial opening 34 and recessed inwardly from the outer surface of the projection 22. The short groove portion 262 is shorter than the long groove portion 261 and does not reach the cylindrical portion 22a.

[0057] As shown in FIG. 12, the valvular structure BK5 uses the same cover 3 as the valvular structure BK. That is, the cover 3 and the protrusion 22 are in a natural state with the long groove portion 261 and the short groove portion 26 The long groove portion 261 and the short groove portion 262 are in close contact with each other except for the opening 34 of the cover 3. The ends farther from the opening 34 are spaced apart at different distances from the opening 34 . In a natural state, the end of the long groove portion 261 farther from the cylindrical portion 23 is covered with the cover 3. The short groove portion 262 is also not in communication with the air chamber V at the end farther from the cylindrical portion 23. It does not communicate with the chamber V. In other words, communication between the groove group 26 and the air chamber V is restricted.

[0058] When the earplug 91E is inserted into the cavity of the concha Eb, the cover 3 is pressed against the cavity of the concha Eb. When the air chamber V is compressed and deformed, if the degree of deformation is small, the air chamber V and the long groove portion 261 The long groove portion 261 functions as an air passage fe that connects the air chamber V and the outside space Vg. The compressed air in the air chamber V is discharged to the outside through the long groove portion 261, which is the ventilation path fe. Since the cross-sectional area of ​​the long groove portion 261 is small, the ventilation between the air chamber V and the outside space Vg is There is great resistance. Therefore, even if the cover 3 is deformed and the air passage fe is established, the pressurized air in the air chamber V The air is not discharged from the long groove 261 to the outside space Vg all at once, but is discharged over time. As a result, the air chamber V elastically contracts slowly.

[0059] On the other hand, when the deformation of the cover 3 is large, the air chamber V is formed not only in the long groove portion 261 but also in the short groove portion 262. The short groove portion 262 functions as an air passage ff that connects the air chamber V and the outside space Vg. Therefore, the crushing deformation of the cover 3 is large, and the air in the air chamber V is compressed in the long groove portion. 261 and the short groove portion 262, respectively, through the ventilation passage fe and the ventilation passage ff, and exhaust to the outside space Vg. will be done. Therefore, when the crushing deformation of the cover 3 is large, the amount of rise in the air chamber V corresponding to the crushing deformation is large. Since the compressed air can be properly discharged, the air chamber V provided in the cavity of the concha Eb by the cover 3 The elastic repulsive force is not applied to the head with excessive force. That is, the earplug 91E has a cover that is crushed when it hits the cavity of the concha Eb when it is attached to the auricle E. Regardless of the amount of crushing deformation of the cover 3, the elastic repulsive force of the cover 3 is stably applied to the cavity of the concha Eb. This provides a better fit.

[0060] The embodiment described above is not limited to the configuration, and may be modified without departing from the gist of the present invention. Modifications that are modified within a wide range are also acceptable. The ear-worn device is not limited to earplugs. A speaker unit is housed inside the main body 911. It is a so-called earplug type earphone or hearing aid that emits sound into the ear canal through the cylindrical part 23. It's okay to have it. [Explanation of symbols]

[0061] 1 Outer housing 1a Bottom wall 1b Inner rib 1c Circumferential recess 1d Surrounding section 1e Outer wall 2, 2D, 2E inner housing 21a Outer flange 21b Engagement protrusion 21c Surrounding part 21d base 22 Protrusion 22a Cylinder part 22b Shoulder 22b1 External surface 22t ceiling wall 22t1 External surface 23 Cylindrical part 25 Groove 26 Groove Group 261 Long groove part 262 Short groove 3, 3B, 3C Cover 31 Cover base (middle part) 31a Inner flange 31b Circumferential rib (first end) 32 Cylindrical protrusion (second end) 32a Side 32b Shoulder 34 Opening 35 Flap section 35a Inner flap 35b outer flap 5 Filter material (ventilation resistor) 5a opening 91,91B,91C,91D,91E Ear plugs (ear fittings) 911 Main body 911a base 911b Protrusion 911c Locking protrusion 912 Insertion part ARb Airflow BK, BK2, BK3, BK4, BK5 valve structure CL22 axis D1 Distance E. Auricle Ea antihelix Eb Concha cavity Ec tragus F1, F2, F3 gap fa,fb,fc,fd,fe,ff ventilation channels LN1 Close border V air chamber Vg outside space

Claims

1. a main body portion having a protruding portion and a tubular portion extending from the protruding portion, the main body portion being attached to the cavity of the concha in use; an insertion portion attached to the tubular portion and inserted into the ear canal in the use state; Equipped with the main body portion includes an inner housing in which the protrusion is formed, and a cover that covers the inner housing, The cover is formed from a flexible material and has a first end that is sealed and fixed to the inner housing side, a second end opposite the first end that has a valve structure and an opening through which the tubular portion is inserted, and an adhesion boundary line that indicates the position where the cover begins to contact the protrusion.

2. 2. The ear wearing device of claim 1, wherein the contact boundary line is located between the first end and the second end, and the inner surface of the second end side of the contact boundary line is in close contact with the outer surface of the inner housing, and the inner surface of the first end side of the contact boundary line is spaced apart from the inner housing to form an air chamber between the inner housing and the inner housing.

3. 3. The ear wearing device according to claim 1, wherein the opening has a bendable ring-shaped flap at its peripheral edge, and the flap portion is in close contact with the outer wall of the tubular portion in its natural state, separating the space that serves as an air passage from the outside space.

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