TWI507049B - Earphone - Google Patents

Description

Headphones (2) Field of invention

The present invention relates to an earphone having at least a portion of an ear canal insertion member that can be inserted into the external auditory canal.

Background of the invention

Conventionally, earphones that are worn on the auricle are known to have a type of a so-called earphone type earphone that does not have a protrusion inserted into the external auditory canal. (For example, refer to Patent Document 1). The earphone has a dynamic type driver unit, so that the driver unit has a vibrating plate vibrating to generate sound.

Figure 7 is a cross-sectional view showing the construction of a conventional earphone.

In the figure, the 813 is a rear case of the earphone, a driver unit 841 is mounted therein, and the driver unit 841 is fixed by an annular front case 812 which is fitted to the front end (the lower end of the figure) of the rear case 813. Moreover, the slot-shaped earphone cord holding portion 815 extends from the rear of the rear casing 813, and one end of the earphone cord holding portion 815 is connected to the driver unit 841, and the other end is connected to a music player, a television, not shown. A cord 891 of an audio machine not shown in the figure, such as a radio or an audio card deck.

Further, the driver unit 841 has a magnet 843 that forms a magnetic path, a magnetic plate 844 and a yoke 845, a diaphragm 846 that forms a vibration system, and a voice coil 847. Specifically, a magnetic plate 844 and a yoke 845 are fixed to both sides of the disk magnet 843. Further, the magnet 843 is a samarium cobalt magnet. Further, a magnetic gap is formed in a space between the magnetic plate 844 and the yoke 845, and a voice coil 847 fixed to the vibrating plate 846 is inserted into the magnetic gap. The vibrating plate 846 is a polyester film. In addition, a mesh-shaped protective plate 848 having a large number of openings is disposed in front of the earphone, that is, in front of the vibration plate 846 (below the figure).

Further, a through hole 849 is formed in a central portion of the magnet 843, the magnetic plate 844, and the yoke 845, and a resistance member 871 made of a foamable urethane or the like is embedded in the through hole 849. Furthermore, a plurality of holes 870 are formed in the driver unit 841.

When the earphone is mounted on the concave portion of the auricle, the protective plate 848 disposed in front of the earphone is opposite to the entrance of the external auditory canal, and the sound generated by the vibration of the vibration plate 846 passes through the opening of the protective plate 848 and is incident on the inside of the external auditory canal. Reach the tympanic membrane.

Advanced technical literature Patent literature

Patent Document 1 Japanese Utility Model Publication Gazette No. 4-50718

However, in the conventional earphone described above, since it is attached to the auricle recess, the wearability is poor, particularly in the case where the user is in a non-stationary state, and the user is detached from the auricle. Moreover, the positional relationship with the external auditory canal is unstable, and the volume and sound quality of the sound incident on the external auditory canal are unstable. Therefore, in recent years, an earphone of the type having an elastic soft rubber or the like and having the ear pad inserted into the external auditory canal is provided. Since the earphone is inserted into the external auditory canal to be worn, it can be surely worn on the auricle and does not fall off the auricle during walking. Moreover, since the ear pad is made of a material having elasticity, it can be elastically deformed in accordance with the shape of the external auditory canal, and a good wearing feeling can be obtained.

However, when the soft ear pad is inserted into the external auditory canal, the ear pad which is deformed by pressing the external auditory canal intercepts the inside and outside of the external auditory canal, and the sound incident from the earphone to the external auditory canal cannot penetrate to the outside, and the so-called sound penetration is deteriorated. In the sound, the sound is unclear, fuzzy, etc., and the sound quality is lowered. Moreover, there is a case where resonance of the ear pad is generated in the low frequency band.

The object of the present invention is to solve the problem of the foregoing earphone. At least one part can be inserted into the external auditory canal and the ear canal insertion member can be attached to and detached from the housing. When the wearability is attached, the external ear canal insertion member can be installed by a soft material. When the sound quality is emphasized, an external ear canal insertion member made of a hard material can be attached, and a high wearability and a good wearing feeling can be obtained in accordance with a wide range of use conditions, and the sound penetration property is good. Reproduces the sound of clear bass and bright mid-high, high-quality headphones.

Therefore, the earphone of the present invention comprises at least a portion of an ear canal insertion member insertable into the external auditory canal, a housing detachable from the external auditory canal insertion member, and a driver unit disposed in the housing to generate sound; the external ear canal insertion The member includes an elastically deformable soft insertion member and a rigid rigid insertion member, and the soft insertion member and the rigid insertion member are selectively attached to the housing.

In another earphone of the present invention, the casing is made of metal, and has a truncated cone-shaped front space formed in front of the driver unit, a sound guide hole that communicates with the front end of the front space, and causes sound to enter the external auditory canal, and A cylindrical rear space formed behind the driver unit, the rear space having a sound quality adjusting hole that opens toward the side.

In still another earphone of the present invention, the rear space has a plane facing the driver unit, the rear space has an air adjustment hole that opens toward the side, and the front space has an air adjustment hole that opens toward the front.

In still another earphone of the present invention, the housing and the outer shape of the ear canal insertion member mounted outside the housing are line-symmetric in an axis extending in the front-rear direction.

In still another earphone of the present invention, the soft insertion member has a cylindrical body portion in which a sound guide hole is formed at the center, and an elastic deformation portion that is connected to the front end of the body portion and that extends obliquely from the front end toward the rear end. The elastic deformation portion has a plurality of slit-shaped openings extending radially from the front end side of the main body portion, and the main body portion has a groove formed in a position corresponding to each of the opening portions of the outer circumferential surface thereof, and When the elastic deformation portion is deformed and pressed to the outer peripheral surface of the main body portion, the opening portion overlaps the groove corresponding thereto.

In still another earphone of the present invention, the hard insertion portion is made of metal, and has a cylindrical guide body formed with a sound guide hole at the center, and a convex portion which is outwardly extended from the front end to the rear end of the main body portion. And inserting at least a portion of the inner surface of the external auditory canal when the protruding portion is inserted into the external auditory canal.

According to the present invention, the earphone system can insert at least a portion into the external auditory canal and the ear canal insertion member can be attached to and detached from the housing. Therefore, when the wearability is emphasized, the external ear canal insertion member can be attached with a soft material, and when the sound quality is emphasized, the external ear canal insertion member can be attached with a hard material. Therefore, it is possible to obtain high mountability and a good wearing feeling in response to a wide range of use conditions, and the sound penetration is good, and the bass with good definition and the high-pitched sound can be reproduced, and the sound quality is improved. .

Simple illustration

Fig. 1 is a cross-sectional view showing a first use example of the earphone according to the embodiment of the present invention, and is a cross-sectional view taken along line A-A of Fig. 2(C).

Fig. 2 is a five-side view showing a first use example of the earphone according to the embodiment of the present invention, wherein (A) is a top view, (B) is a left side view, (C) is a rear view, and (D) is a right side view. , (E) is the front view.

Fig. 3 is a four-side view of an ear pad according to an embodiment of the present invention, wherein (A) is a left side view, (B) is a rear view, (C) is a right side view, and (D) is a front view.

Fig. 4 is a cross-sectional view showing an ear pad according to an embodiment of the present invention, (A) is a B-B arrow sectional view of Fig. 3(B), and (B) is a C-C arrow sectional view of Fig. 3(B).

Fig. 5 is a cross-sectional view showing a second use example of the earphone according to the embodiment of the present invention, and is a cross-sectional view taken along line D-D of Fig. 6(C).

Fig. 6 is a five-side view showing a second use example of the earphone according to the embodiment of the present invention, wherein (A) is a top view, (B) is a left side view, (C) is a rear view, and (D) is a right side view. , (E) is the front view.

Figure 7 is a cross-sectional view showing the construction of a conventional earphone.

Form for implementing the invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a cross-sectional view showing a first use example of the earphone according to the embodiment of the present invention, and is a cross-sectional view taken along line A-A of Fig. 2(C). Fig. 2 is a five-side view showing a first use example of the earphone according to the embodiment of the present invention. In addition, in Fig. 2, (A) is a top view, (B) is a left side view, (C) is a rear view, (D) is a right side view, and (E) is a front view.

In the figure, a 10-series earphone of the present embodiment is a small sound generator that is mounted on the auricle of a user and is used to drive an audio signal and reproduce the sound signal. Further, the earphone 10 has a casing 11 as a casing in which a driver unit 41 that reproduces sound and generates a sound, and is further mounted on the casing 11, and at least the front end portion 55 thereof can be inserted into the user. The ear pad 50 which is an external auditory canal insertion member of the external auditory canal is used as a first use example.

The housing 11 has a housing 12 on the front side thereof and a truncated cone-shaped rear housing 13 coupled to the rear side of the base portion 12a of the front housing 12. Further, as shown in Fig. 1, the driver unit 41 is held in the casing 11 in a state in which the front casing 12 and the rear casing 13 are sandwiched by the front casing 12 and the rear casing 13 (above and below the first drawing). Further, the driver unit 41 is a so-called dynamic type, and has the same configuration as the driver unit 841 of the conventional earphone described in the "Invention Background". That is, with regard to the description of the driver unit 41, the description of the driver unit 841 of the conventional earphone is used.

Further, after the rear surface of the rear casing 13 is sealed, the surface portion 13a is a substantially flat member, whereby the rear of the actuator unit 41 in the casing 11 (below the first drawing) is formed in a cylindrical shape and more detailed. It is a rear space 24 in which a space having a shape of a truncated cone and a cylinder is combined. The rear surface of the rear space 24 opposite to the driver unit 41 is the inner surface of the rear portion 13a and is opposite to the plane of the vibrating plate of the driver unit 41. As shown in Fig. 1, the radius of curvature may be slightly curved. Smooth surface. Further, the casing 11 is specifically made of a metal such as aluminum, steel, copper or the like, or may be a hard resin having a large specific gravity such as crystal.

Further, an upper end of the tubular earphone cord holding portion 15 which is held by a portion of the earphone cord 91 which is connected to the driver unit 41 at one end is attached to the rear casing 13. Further, the earphone cord holding portion 15 may be formed integrally with the rear casing 13. Further, the earphone wire 91 extends from the lower end of the earphone wire holding portion 15. Further, in Fig. 2, for the convenience of the drawing, the headphone cord 91 only draws a portion close to the headphone cord holding portion 15, and the other portions are omitted. Further, the other end of the headphone cord 91, which is not shown, can be connected to a music player, a television, a radio, an audio card deck, and the like, which are not shown.

The front casing 12 has not only the cylindrical base portion 12a but also a truncated cone-shaped conical portion 16 projecting forward from the base portion 12a, and a cylindrical insertion portion attaching portion 17 projecting from the front end of the conical portion 16. The diameter of the front end of the conical portion 16 is smaller than the base end (portion connected to the base portion 12a), whereby the front side of the driver unit 41 in the casing 11 (above the first figure) is formed as a truncated cone space. Space 21. Further, the insertion portion mounting portion 17 is formed with a housing sound guide hole 22 as a sound guide hole that communicates with the front space 21 at the rear end and the cylindrical opening whose front end is open. Thereby, the sound generated by the driver unit 41 passes through the front space 21 and the housing sound guide hole 22, and is incident on the ear canal of the user. Further, the conical portion 16 is formed such that the axis of its front end coincides with the axis of the base end. Therefore, when the earphone cord holding portion 15 and the earphone cord 19 are excluded, the outer shape of the earphone 10 including the casing 11 and the ear pad 50 is circular as viewed from the front as shown in the second (E) diagram, as shown in FIG. (A), 2 (B), and 2 (D) are line symmetrical along the axis as viewed from the side.

Further, a front air passage 25 as an air adjusting hole having a function of an exhaust port is formed in the conical portion 16 of the front casing 12. The front air passage 25 is formed so as to penetrate the circular hole having a circular cross section through the conical portion 16, and communicates the front space 21 with the outside, and the air in the front space 21 can be discharged to the outside. Further, the front air passage 25 is formed in a portion of the conical portion 16 which is close to the base portion 12a, that is, a portion which is formed on the front surface. That is, the front air passage 25 is formed to face forward, and the air in the front space 21 can be discharged toward the front. Further, the diameter of the front air passage 25 is 1.2 [mm], which can be changed in accordance with the performance of the driver unit 41, the size of the front space 21, and the like.

Further, a rear air passage 28 as an air adjusting hole having a function of an exhaust port is formed in the cylindrical side surface portion 13b of the rear casing 13, and the first adjustment hole 27a, the second adjustment hole 27b, and the first adjustment hole 27b as the sound quality adjusting hole are formed. 3 Adjust the hole 27c. In addition, when the first adjustment hole 27a, the second adjustment hole 27b, and the third adjustment hole 27c are collectively described, the sound quality adjustment hole 27 will be described.

The rear air passage 28 is formed as a circular hole that penetrates the side surface portion 13b of the rear casing 13, and communicates the rear space 24 with the outside, and the air in the rear space 24 can be discharged to the outside. Further, the rear air passage 28 is formed to face the side, and the air in the rear space 24 can be discharged toward the side. Further, the diameter of the rear air passage 28 is set to be the same as that of the front air passage 25, and can be changed in accordance with the performance of the driver unit 41, the size of the rear space 24, and the like. In this way, by disposing the exhaust port of the same diameter, that is, the front air passage 25 and the rear air passage 28 in the front space 21 and the rear space 24, the distortion and the echo of the sound can be corrected, and the vibration plate applied to the driver unit 41 can be reduced. The load.

Further, the first adjustment hole 27a, the second adjustment hole 27b, and the third adjustment hole 27c are formed so as to penetrate the side surface portion 13b of the rear case 13, and have a circular hole having a circular cross section toward the side, and connect the rear space 24 to the outside. And adjacent to the rear air passage 28, and arranged side by side on the same circumference of the rear casing 13 to form a row. Further, the diameter of the first adjustment hole 27a is smaller than the diameter of the rear air passage 28, the diameter of the second adjustment hole 27b is smaller than the diameter of the first adjustment hole 27a, and the diameter of the third adjustment hole 27c is formed smaller than the second adjustment hole. Trail 27b. Further, the diameters of the second adjustment hole 27b and the third adjustment hole 27c may be the same.

The diameter of the first adjustment hole 27a is 0.8 [mm]. By the diameter of the first adjustment hole 27a being such a value, the sound in the frequency band centered at 1200 [Hz] is controlled, and the frequency response can be made smoother, and the sound quality can be improved. Further, the diameter of the second adjustment hole 27b is 0.4 [mm]. By the diameter of the second adjustment hole 27b being such a value, the sound of the frequency band centered at 200 [Hz] is controlled, and the frequency response can be made smoother, and the sound quality can be improved. Further, the diameter of the third adjustment hole 27c is less than 0.4 [mm]. By the diameter of the third adjustment hole 27c being such a value, it is possible to control the sound of the frequency band lower than the second adjustment hole 27b, and the frequency response can be made smoother, and the sound quality can be improved.

In addition, when the second adjustment hole 27b has the same diameter as the third adjustment hole 27c, for example, two second adjustment holes 27b, it is possible to control a frequency band centered at 200 [Hz] in response to a difference in one adjustment hole. sound.

In addition, in the example shown in the figure, the sound quality adjustment hole 27 is the first adjustment hole 27a, the second adjustment hole 27b, and the third adjustment hole, and the sound quality adjustment hole 27 may be one or two, or may be 4 or more. Further, the diameter of the sound quality adjustment hole 27 can be changed in accordance with the frequency band of the sound to be controlled. In other words, in order to control the sound of the lower frequency band, the diameter of the sound quality adjusting hole 27 may be reduced, and the sound of the higher frequency band may be controlled to increase the diameter of the sound quality adjusting hole 27.

In other words, the sound quality adjusting holes 27 determine the audio to be controlled based on the diameter of the hole, and control the characteristics according to the number, and adjust the air balancer related to the open feeling of the sound.

Further, after the side surface portion 13b of the rear case 13 is formed, the air passage 28 and the sound quality adjusting hole 27 are disposed on the same circumference, and the adjustment holes are disposed at the same distance from the driver unit, so that the sound can be more effectively controlled. .

Further, since the casing 11 that houses the driver unit 41 and forms the front space 21 and the rear space 24 in the front and rear sides thereof is made of a metal having a larger specific gravity than a resin and a high rigidity, the front space 21 and the rear space 24 serve as The function of the sound space is good, the bass is thick, and the middle and high notes are bright. Further, since the outer shape of the casing 11 is line-symmetrical along the axis as viewed from the side, the shapes of the front space 21 and the rear space 24 are also line symmetrical along the axis, whereby a distortion-free sound can be generated.

Further, an ear pad 50 is attached to the insertion portion mounting portion 17 by the attachment adapter 14. The mounting adapter 14 is a cylindrical member made of the same material as the casing 11, and its lower end is inserted into the inner peripheral surface of the insertion portion mounting portion 17, that is, the housing recess 17a formed on the circumferential surface of the housing sound guide hole 22. . Further, although the lower end of the mounting adapter 14 is fitted into the housing recess 17a, the mounting adapter 14 is fixed to the housing recess 17a, but the lower end of the mounting adapter 14 and the receiving recess 17a form a threaded groove. It is preferable that the lower end of the mounting adapter 14 is screwed into the housing recess 17a to fix the mounting adapter 14 to the housing recess 17a. Further, the mounting adapter 14 is formed with an adapter sound guiding hole 14b as a sound guiding hole which is a cylindrical opening which is open to the front and rear. The inner diameter of the adapter sound guiding hole 14b is preferably equal to the inner diameter of the housing sound guiding hole 22.

Further, the ear pad 50 is a soft insertion member, and is made of a soft elastically deformable material such as rubber, and is an integrally formed member having a cylindrical body portion 51 embedded around the mounting adapter 14 and The front end portion of the main body portion 51 is expanded toward the rear end to expand the umbrella portion 53 as an elastic deformation portion. Further, a flange-shaped engagement convex portion 52 having a thick thickness protruding inward is formed at the rear end of the main body portion 51. The engaging convex portion 52 is engaged with the groove-shaped engaging recess portion 14a formed in the mounting adapter 14, and the ear pad 50 can be prevented from coming off the mounting adapter 14.

The ear pad 50 has a shape resembling a mushroom or an umbrella. At the front end portion 55, a front end of the umbrella portion 53 is connected to the front end of the main body portion 51, and the outer peripheral surface of the main body portion 51 and the inner peripheral surface of the umbrella portion 53 are provided. A cavity portion 65 is formed therebetween. Further, a pad acoustic guide hole 61 as a sound guide hole, which is a cylindrical opening opened at the front and rear ends, is formed at the center of the main body portion 51. The pad sound guiding hole 61 is in contact with the housing sound guiding hole 22 by the adapter sound guiding hole 14b in a state where the ear pad 50 is attached to the insertion portion mounting portion 17 by the mounting adapter 14.

Further, the umbrella portion 53 has a truncated cone-shaped front half portion 53a that expands rearward, and a cylindrical rear half portion 53b that extends from the rear end of the front half portion 53a to the rear. The umbrella portion 53 is thinner than the body portion 51 and has flexibility, and is easily deformed by the force. Therefore, when the ear pad 50 is inserted into the external auditory canal, the umbrella portion 53 is elastically deformed to conform to the inner surface shape of the external auditory canal without causing damage to the external auditory canal, and the reaction force is not applied to the inner surface of the external auditory canal to be tightly fitted. Wear feeling, suitability, etc.

Further, in the front half portion 53a of the umbrella portion 53, a plurality of slit-shaped opening portions 62 (six in the illustrated example) extending in a radial shape as viewed from the distal end side are formed. When the user wears the earphone 10, the ear pad 50 is inserted into the external auditory canal, and the inside and outside of the external auditory canal is blocked by the umbrella portion 53. However, since the external ear canal communicates with the inside and the outside due to the presence of the opening portion 62, even when the earphone 10 is attached, an external environmental sound such as an alarm can be incident on the inside of the external auditory canal and reach the tympanic membrane, so that the safety is not lowered. Further, since the air inside the external auditory canal passes through the opening portion 62 and penetrates to the outside, the pressure of the sound incident from the driver unit 41 through the housing sound guiding hole 22 and the pad sound guiding hole 61 to the inside of the external auditory canal can be reduced, and the pressure is unclear. Feeling and so on. Therefore, the clarity of the bass is good and the middle and high notes are bright. Further, since the sound from the actuator unit 41 does not press the tympanic membrane, it is also preferable in terms of a healthy surface.

Further, on the outer peripheral surface of the main body portion 51, a groove 63 as a groove extending in the front-rear direction, that is, in the axial direction of the main body portion 51 is formed at a position corresponding to the opening portion 62. Therefore, when the ear pad 50 is inserted into the external auditory canal, even if the umbrella portion 53 is deformed and pressed to the outer peripheral surface of the body portion 51, since the opening portion 62 and the corresponding pad groove 63 overlap each other, Maintain communication between the inside and outside of the external auditory canal.

Next, the structure of the aforementioned ear pad 50 will be described in detail.

Fig. 3 is a four-side view of an ear pad according to an embodiment of the present invention, and Fig. 4 is a cross-sectional view of an ear pad according to an embodiment of the present invention. In addition, in Fig. 3, (A) is a left side view, (B) is a rear view, (C) is a right side view, and (D) is a front view. In Fig. 4, (A) is a cross-sectional view taken along line B-B of Fig. 3(B), and (B) is a cross-sectional view taken along line C-C of Fig. 3(B).

The front end of the main body portion 51 and the front end of the umbrella portion 53 are connected by the front end connecting portion 54, and the front end of each opening portion 62 communicates with the front end of the pad sound guiding hole 61 via the communicating concave portion 64. Further, at the circumferential end portion 55 of the ear pad 50, the distal end connecting portion 54 and the communicating concave portion 64 are alternately arranged. Therefore, the sound incident from the driver unit 41 to the inside of the external auditory canal through the housing sound guiding hole 22, the adapter sound guiding hole 14b, and the pad sound guiding hole 61 is worn from the opening portion 62 by a part thereof by the communication concave portion 64. It is transparent to the outside, so it can reduce the pressure of low pressure, unclear feeling, etc.

Further, as shown in Fig. 4(A), the front end connecting portion 54 is thicker than the umbrella portion 53, and has a higher rigidity than the umbrella portion 53, and is not easily deformed. Further, the communication concave portion 64 disposed between the front end connecting portions 54 is formed to be recessed to the rear end edge of the front end portion 55, that is, the front edge of the front end connecting portion 54 as viewed from the side. Therefore, when the ear pad 50 is inserted into the external auditory canal, even if the umbrella portion 53 is deformed, the communication concave portion 64 is not closed, and the communication sound guiding hole 61 and the opening portion 62 can be maintained. Further, as described above, even if the formation of the umbrella portion 53 is deformed, it is pressed not only to the outer peripheral surface of the main body portion 51 but also to the surface of the conical portion 16, and the opening portion 62 and the pad 63 can communicate with each other. Therefore, since it is possible to stably ensure the passage of the sound from the pad sound guiding hole 61 via the communicating concave portion 64, the opening portion 62, and the pad 63 to the outside, it is possible to stably reduce the low pressure sensation, the unclear feeling, and the like, and maintain the brightness. Sound quality.

Further, as shown in Fig. 4(B), the opening portion 62 is preferably formed to be connected to the front end of the pad 63 at the front end thereof. At this time, even if the umbrella portion 53 is largely deformed, the communication between the opening portion 62 and the pad groove 63 can be maintained stable.

Further, as shown in the third (D) diagram, a plurality of slit-like openings 62 extending radially from the front are formed in the front half portion 53a of the umbrella portion 53. Therefore, due to the presence of the opening portion 62, the rigidity of the front half portion 53a is lowered, and the deformation is easy. When the ear pad 50 is inserted into the external auditory canal, not only the front half portion 53a but also the entire umbrella portion 53 is elastically elastically deformed, and is suitable for the outer ear canal. Face shape. Therefore, since the damage to the external auditory canal is not caused, the safety is high, and the umbrella-shaped portion 53 does not exert a reaction force on the inner surface of the external auditory canal to be in close contact with each other, so that the wearing feeling and the appropriate feeling are good, and the earphone 10 can be prevented from the auricle. Fall off.

Further, in the example shown in the drawing, the number of the opening portion 62, the pad groove 63, and the communication concave portion 64 is six, and it is not necessary to be six, and may be five or less, or seven or more.

As described above, since the ear pad 50 made of a soft material is attached to the insertion portion mounting portion 17 by the attachment adapter 14, the wearability of the earphone 10 is increased, and it is suitable for use when the user performs an activity such as walking. Further, as described above, since the inside and outside of the external auditory canal are connected by the presence of the opening portion 62 and the like, an external environmental sound such as an alarm is incident on the inside of the external auditory canal and reaches the tympanic membrane, so that the safety is not lowered and the sound quality is also good.

Next, a second use example of the earphone 10 will be described.

Fig. 5 is a cross-sectional view showing a second use example of the earphone according to the embodiment of the present invention, which is a cross-sectional view taken along line DD of Fig. 6(C), and Fig. 6 is a view showing a second use example of the earphone according to the embodiment of the present invention. Five-sided picture. In addition, in Fig. 6, (A) is a top view, (B) is a left side view, (C) is a rear view, (D) is a right side view, and (E) is a front view.

In the second use example, the earplug 70, at least the distal end portion 75 of which can be inserted into the external auditory canal of the user's external auditory canal, is attached to the casing 11. The earplug 70 is a hard insertion member, and is made of a hard material having the same rigidity as the metal of the casing 11, that is, having a large specific gravity.

Further, the earplug 70 is a member integrally formed, and has a cylindrical body portion 71 and a convex portion 74 whose outer surface extends obliquely from the front end to the rear end of the main body portion 71. Further, a portion of the main body portion 71 that extends rearward of the protruding portion 74 is a mounting portion 72. The attachment portion 71 is inserted into the inner circumferential surface of the insertion portion mounting portion 17 of the casing 11, that is, the housing recess 17a formed on the circumferential surface of the housing sound guide hole 22. Further, although the attachment portion 72 may be fitted into the accommodation recess portion 17a, the earplug 70 may be fixed to the accommodation recess portion 17a. However, the attachment portion 72 and the accommodation recess portion 17a form a screw groove, and the attachment portion 72 is screwed into the accommodation recess portion 17a. It is preferable to fix the earplug 70 to the housing recess 17a.

Further, an earplug sound guide hole 73 as a sound guide hole, which is a cylindrical opening opened at the front and rear ends, is formed at the center of the main body portion 71. The earplug sound guiding hole 73 communicates with the housing sound guiding hole 22 in a state where the earplug 70 is attached to the insertion portion mounting portion 17. Further, the inner diameter of the earphone sound guiding hole 73 is preferably equal to the inner diameter of the housing sound guiding hole 22.

The aforementioned convex portion 74 has a shape other than a truncated cone, and the outer diameter of the front end portion 75 is the smallest, and the outer diameter is larger as it goes downward. That is, the projection 74 can be easily inserted into the external auditory canal because it has a tapered tapered surface. Further, the maximum outer diameter of the projection 74 is preferably larger than the outer diameter of the upper end of the insertion portion mounting portion 17 of the housing 11.

Further, when the earphone cord holding portion 15 and the earphone cord 91 are excluded, the outer shape of the earphone 10 including the casing 11 and the earplug 70 is as shown in Fig. 6(E), and is circular as viewed from the front, as in the sixth ( A), Figure 6(B), and Figure 6(D) show line symmetry along the axis as viewed from the side.

Further, when the protruding portion 74 of the earplug 70 is inserted into the external auditory canal, the inner surface of the external auditory canal is pressed and deformed, and at least a portion of the inner surface of the external auditory canal is brought into close contact with the outer surface of the convex portion 74. At this time, since the outer surface of the convex portion 74 forms a tapered tapered surface, when the convex portion 74 is inserted into the external auditory canal, the inner surface of the external auditory canal can be smoothly deformed without causing damage to the external auditory canal, and the inner ear canal is faced. The outer surface of the protruding portion 74 has high adhesion, and is excellent in mounting feeling and appropriate feeling.

Further, since the earplug 70 including the projection 74 is formed of a hard material having a large specific gravity and high rigidity, the sound from the actuator unit 41 is not resonated. Therefore, the sound quality is improved. Further, even if the protruding portion 74 is inserted into the external auditory canal, the earplug sound guiding hole 73 is not deformed. Therefore, since the sound from the driver unit 41 is incident on the external auditory canal without distortion, the sound quality is improved.

Thus, in the present embodiment, the earphone 10 includes at least a portion of the ear canal insertion member that can be inserted into the external auditory canal, the housing 11 that can be detachably attached to the external auditory canal insertion member, and a driver that is disposed in the housing 11 to generate sound. The unit 41, the external auditory canal insertion member comprises an elastically deformable ear pad 50 and a high rigidity earplug 70, and the ear pad 50 and the earplug 70 are selectively mounted to the housing 11.

Thereby, the ear pad 50 and the earplug 70 can be appropriately selected and attached to the casing 11 in accordance with the use condition of the earphone 10. For example, if the wearability is emphasized when walking outside the house, the ear pad 50 is selected, and when the sound quality is emphasized when the music is appreciated indoors, the earplug 70 can be selected. Therefore, it is possible to obtain high mountability and a good wearing feeling in response to a wide range of use conditions, and high sound quality can be obtained.

Further, the casing 11 has a truncated cone-shaped front space 21 formed in front of the driver unit 41, a front end of the front space 21, and a housing sound guide hole 22 for allowing sound to enter the external auditory canal, and a circle formed at the rear of the driver unit 41. The cylindrical rear space 24 is made of metal, and the rear space 24 has a sound quality adjusting hole 27 that opens toward the side.

In this manner, since the casing 11 that houses the driver unit 4 and forms the front space 21 and the rear space 24 in front and rear thereof is made of a metal having a relatively high rigidity and a high rigidity, the front space 21 and the rear space 24 serve as acoustic spaces. The function is good, but it can produce thick bass and bright mid-high sound, and the sound characteristics are good. Further, the sound quality adjustment hole 27 can be appropriately controlled to appropriately control the sound quality of the desired frequency band.

Further, the rear space 24 faces the plane of the driver unit 41, and the rear space 24 has an air passage 28 that opens toward the side, and the front space 21 has a front air passage 25 that opens toward the front. Thereby, the distortion and the echo of the sound can be corrected, and the load applied to the diaphragm of the driver unit 41 can be alleviated.

Further, the housing 11 and the axis outside the ear canal insertion member attached to the housing 11 are line-symmetric in an axis extending in the front-rear direction. Thereby, a sound without distortion can be produced.

Further, the ear pad 50 has a cylindrical body portion 51 in which the pad sound guiding hole 61 is formed at the center, an umbrella portion 53 that is connected to the front end of the main body portion 51, and extends obliquely from the front end toward the rear end, and the umbrella portion 53 has a slave body portion. The plurality of slit-shaped openings 62 extending in a radial shape are viewed from the front end side of the portion 51. The main body portion 51 has a pad 63 formed at an outer peripheral surface thereof corresponding to each of the openings 62 and extending in the axial direction. When the umbrella portion 53 is deformed and pressed to the outer peripheral surface of the main body portion 51, the opening portion 62 is overlapped with the pad 63 corresponding thereto.

Thereby, when the ear pad 50 is inserted into the external auditory canal, even if the formed umbrella portion 53 is deformed and pressed to the outer peripheral surface of the body portion 51, the communication between the inside and the outside of the external auditory canal can be maintained. Therefore, since the external environmental sound such as an alarm is incident on the inside of the external auditory canal and reaches the tympanic membrane, the safety is not lowered. Further, since the air inside the external auditory canal passes through the opening 62 and penetrates to the outside, the pressure of the sound incident on the inside of the external auditory canal from the earphone 10, the feeling of unclearness, and the like can be reduced. Therefore, the clarity of the bass is good and the middle and high notes are bright. Furthermore, since the sound from the earphone 10 does not press the tympanic membrane, it is also preferable in terms of a healthy surface.

Further, the earplug 70 has a cylindrical body portion 71 in which the earplug sound guiding hole 73 is formed at the center, a convex portion 74 which is outwardly extended from the front end to the rear end of the main body portion 71, and is formed of metal, and the convex portion 74 is When inserted into the external auditory canal, at least a portion of the inner surface of the external auditory canal is deformed. Thereby, the feeling of installation, the sense of fit, and the like are good, and the clarity of the bass is good, and the middle and high notes are bright. Further, since the earphone sound guiding hole 73 is not deformed even if the protruding portion 74 is inserted into the external auditory canal, the sound from the driver unit 41 is incident on the external auditory canal without distortion, and the sound quality is good.

Further, the present invention is not limited to the foregoing embodiments, and various modifications may be made without departing from the scope of the invention.

Industry availability

The invention is applicable to earphones having at least a portion of an ear canal insertion member that can be inserted into the external auditory canal.

10. . . headset

11. . . case

12. . . Front housing

12a. . . Base

13. . . Rear housing

13a. . . Back part

13b. . . Side section

14. . . Mounting adapter

14a, 19a. . . Engagement recess

14b. . . Adapter sound guide hole

15,815. . . Headphone cord holder

16. . . Cone

17. . . Insertion mounting section

17a. . . Containing recess

18. . . Round plate

19. . . Pad mounting

twenty one. . . Front space

twenty two. . . Housing sound guide hole

twenty four. . . Rear space

25. . . Front airway

27. . . Sound quality adjustment hole

27a. . . 1st adjustment hole

27b. . . 2nd adjustment hole

27c. . . 3rd adjustment hole

28. . . Rear airway

41,841. . . Drive unit

50. . . Ear pad

51,71. . . Body part

52. . . Engagement convex

53. . . Umbrella

53a. . . First half

53b. . . The second half

54. . . Front end connection

55,75. . . Front end

61. . . Pad sound guide hole

62. . . Opening

63. . . Gutter

64. . . Connected recess

65. . . Cavity

70. . . earplug

72. . . Installation department

73. . . Earplug sound guide hole

74. . . Protrusion

91,891. . . Headphone cord

812. . . Front shell

813. . . Rear shell

843. . . magnet

844. . . Magnetic board

845. . . Yoke

846. . . Vibrating plate

847. . . Voice coil

848. . . Protection board

849. . . Through hole

870. . . hole

871. . . Resistance material

Fig. 1 is a cross-sectional view showing a first use example of the earphone according to the embodiment of the present invention, and is a cross-sectional view taken along line A-A of Fig. 2(C).

Fig. 2 is a five-side view showing a first use example of the earphone according to the embodiment of the present invention, wherein (A) is a top view, (B) is a left side view, (C) is a rear view, and (D) is a right side view. , (E) is the front view.

Fig. 3 is a four-side view of an ear pad according to an embodiment of the present invention, wherein (A) is a left side view, (B) is a rear view, (C) is a right side view, and (D) is a front view.

Fig. 4 is a cross-sectional view showing an ear pad according to an embodiment of the present invention, (A) is a B-B arrow sectional view of Fig. 3(B), and (B) is a C-C arrow sectional view of Fig. 3(B).

Fig. 5 is a cross-sectional view showing a second use example of the earphone according to the embodiment of the present invention, and is a cross-sectional view taken along line D-D of Fig. 6(C).

Fig. 6 is a five-side view showing a second use example of the earphone according to the embodiment of the present invention, wherein (A) is a top view, (B) is a left side view, (C) is a rear view, and (D) is a right side view. , (E) is the front view.

Figure 7 is a cross-sectional view showing the construction of a conventional earphone.

10. . . headset

11. . . case

12. . . Front housing

12a. . . Base

13. . . Rear housing

13a. . . Back part

13b. . . Side section

14. . . Mounting adapter

14a. . . Engagement recess

14b. . . Adapter sound guide hole

16. . . Cone

17. . . Insertion mounting section

17a. . . Containing recess

twenty one. . . Front space

twenty two. . . Housing sound guide hole

twenty four. . . Rear space

25. . . Front airway

27. . . Sound quality adjustment hole

27a. . . 1st adjustment hole

27b. . . 2nd adjustment hole

27c. . . 3rd adjustment hole

28. . . Rear airway

41. . . Drive unit

50. . . Ear pad

51. . . Body part

52. . . Engagement convex

53. . . Umbrella

53a. . . First half

53b. . . The second half

55. . . Front end

61. . . Pad sound guide hole

62. . . Opening

63. . . Gutter

65. . . Cavity

Claims (4)

An earphone comprising: an external auditory canal insertion member, at least a portion of which can be inserted into an external auditory canal; a housing for attaching and detaching the external auditory canal insertion member; and a driver unit disposed in the housing to generate sound; the earphone is characterized by: The external auditory canal insertion member includes an elastically deformable soft insertion member and a rigid rigid insertion member, wherein the soft insertion member and the rigid insertion member are selectively attached to the housing, wherein the housing is made of metal and has: formed in the foregoing a truncated cone-shaped front space in front of the driver unit, a sound guiding hole that allows sound to enter the external auditory canal, and a cylindrical rear space formed behind the driver unit, and the rear space has a side opening a sound quality adjusting hole, wherein the hard insertion member is made of metal, and has a cylindrical body portion in which the sound guide hole is formed at the center, and a convex portion which is outwardly extended from the front end to the rear end of the body portion, and is obliquely extended. When the protruding portion is inserted into the external auditory canal, at least a portion of the inner surface of the external auditory canal is deformed. The earphone of claim 1, wherein the rear space has a plane facing the driver unit, the rear space has an air adjustment hole that opens toward the side, and the front space has an air adjustment hole that opens toward the front. The earphone of claim 2, wherein the outer casing and the ear canal insertion member mounted outside the casing are linearly symmetrical along an axis extending in the front-rear direction. The earphone of claim 3, wherein the soft insertion member has a cylindrical body portion in which a sound guide hole is formed at the center, and an elastic deformation portion that is connected to the front end of the body portion and obliquely extends from the front end toward the rear end. The elastic deformation portion has a plurality of slit-shaped openings extending radially from the front end side of the main body portion, and the main body portion has a groove formed at a position corresponding to each of the opening portions of the outer circumferential surface thereof. And extending in the axial direction, when the elastic deformation portion is deformed and pressed to the outer peripheral surface of the main body portion, the opening portion overlaps with the groove corresponding thereto.