JP5008762B2 - headphone - Google Patents

Description

  The present invention relates to headphones having a waterproof function, and is particularly suitable for inner-ear headphones, so-called earphones.

  In general, a headphone is provided with a sound emitting hole and an air passage in a housing in which a driver unit (also referred to as a speaker) as an electroacoustic transducer is housed for reasons of structure and acoustic characteristics. In other words, sound quality is improved by providing sound emission holes for releasing the sound generated by the driver unit to the outside of the housing and air passages for releasing air on the front and back sides of the driver unit to the atmosphere. In addition, the diaphragm of the driver unit is prevented from being deformed and unusable due to a change in atmospheric pressure.

  For this reason, if dropped in water, rainwater or sweat, moisture will enter the housing through the sound vents and vents and the acoustic characteristics of the driver unit will deteriorate. There is a risk of becoming.

  Therefore, for example, headphones having a waterproof function as disclosed in Patent Documents 1 and 2 have been proposed. The headphones described in these patent documents each include a housing that can be divided and a driver unit accommodated in the housing. And in patent document 1, the penetration | invasion of water is prevented by water-repellent-processing the sound-release hole (duct) provided in the housing. On the other hand, in Patent Document 2, a waterproof cloth is bonded to an opening portion of a housing (case), and a porous member such as a wire mesh or a screen is provided outside the waterproof cloth, and the gap between the porous member and the waterproof cloth. By forming an air chamber, the capacity of the waterproof cloth is higher than the water resistance level.

Japanese Utility Model Publication No. 61-81283 JP 59-144297 A

  However, in the case of a water repellent treatment or a combination of a waterproof cloth and a porous member, when water is given by the dynamic load of the jet, the infiltration cannot be prevented and the waterproof cloth or the porous member may be deformed or peeled off. is there. And since a housing is comprised by the combination of a some component, a water | moisture content may penetrate | invade in a housing from the junction part of these components.

  For this reason, there is a problem that it is difficult to ensure stable and high waterproof performance.

  The present invention has been proposed in view of the above, and an object thereof is to provide a headphone that is stable and has high waterproof performance.

  In order to solve the above-mentioned problem, in the headphones of the present invention according to claim 1, the front housing 1 and the rear housing 2 are joined to form a first housing, and the driver unit 5 is accommodated in the first housing. A headphone having an ear pad 10 attached to the front outer periphery of the front housing 1, the first waterproof mesh 6 fixed to the driver unit 5 side of the sound emitting hole 1A in the front housing 1; It is provided with the protector 7 which is provided in the attachment side of the ear pad 10 of the sound emission hole 1A in the front housing 1 and protects the first waterproof mesh 6 from the dynamic load of the water jet.

  According to a second aspect of the present invention, in the headphones according to the first aspect, the first waterproof mesh is further provided with an inner housing 3 provided in the first housing and accommodating the driver unit 5. 6 is clamped between the front housing 1 and the inner housing 3, and is fixed by ultrasonic welding.

  Furthermore, the present invention according to claim 3 is the headphone according to claim 2, further comprising an insert part attached to the rear housing 2, wherein the insert part is fixed to the inner housing 3 with an adhesive. An inner rear housing 4 which forms a second housing for accommodating the driver unit 5 and forms a space on the back side of the driver unit 5; an opening is exposed from the first and second housings; and the driver And a cover 9 having a vent hole 12 communicating with a space formed on the back side of the unit 5.

  Furthermore, the present invention according to claim 4 is the headphone according to claim 3, provided in a space formed on the back side of the driver unit 5 in the inner rear housing 4 and bonded to the vent hole 12. The second waterproof mesh 8 is further provided.

  The present invention according to claim 5 is the headphone according to claim 1, further comprising an airtight member 11 interposed on a joint surface between the front housing 1 and the rear housing 2, and the front housing 1 and the rear housing. 2 are fitted through the airtight member 11 and joined with an adhesive to form the first housing.

  In the first aspect of the present invention, the first waterproof mesh 6 is provided on the front surface of the driver unit 5 so as to prevent water from entering the driver unit 5, and the first waterproof mesh 6 of the front housing 1 is provided. Since the protector 7 is provided in front of the corresponding sound emission hole 1A, even when water is given by the dynamic load of the jet, the waterproof performance is improved and maintained so that the first waterproof mesh 6 is not directly exposed to water. it can.

  Further, in the present invention described in claim 2, the first waterproof mesh 6 is mechanically sandwiched between the front housing 1 and the inner housing 3 and is fixed using ultrasonic welding. 1 waterproof mesh 6 does not peel off, and the waterproof performance can be stabilized more than fixing without an adhesive.

  Further, according to the present invention, the cover 9 provided with the vent holes 12 is attached to the inner rear housing 4 by insert molding so that the mold design can be facilitated and the appearance is not conspicuous. Since the vent hole 12 can be provided, the design can be improved.

  Furthermore, in the present invention described in claim 4, by providing the second waterproof mesh 8, it is possible to prevent moisture from entering from the air passage 4A and to stabilize the waterproof performance.

  According to the fifth aspect of the present invention, when the front housing 1 and the rear housing 2 are fitted, the airtight member 11 is interposed in the fitting portion and the adhesive is interposed. Can be prevented from entering.

1 is an exploded perspective view of a headphone according to an embodiment of the present invention. It is sectional drawing of the headphones which concern on the Example of this invention. FIG. 3 is a perspective view of a protector in the headphones shown in FIGS. 1 and 2. FIG. 3 is a perspective cross-sectional view around an ear pad and a front housing in the headphones shown in FIGS. 1 and 2. It is a perspective view for demonstrating the insert molding process of a rear housing, an inner rear housing, and a cover, and the attachment process of a 2nd waterproof mesh.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an exploded perspective view of a headphone according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the headphone according to the embodiment of the present invention.

  As shown in FIGS. 1 and 2, the outer housing (first housing) of the headphones is formed by joining a front housing 1 and a rear housing 2, and is formed on a front outer peripheral portion that forms a cylindrical shape of the front housing 1. An ear pad 10 to be inserted into the ear canal is attached. The ear pad 10 is made of a soft member, and has a substantially cylindrical tube portion 10a fitted to the front outer peripheral portion of the housing, and an ear pad outer surface portion 10b that curves and extends toward the first housing body at the front end of the tube portion. A hollow portion is formed between the ear pad outer surface portion 10b and the tube portion 10a. When the ear pad outer surface portion 10b is inserted into the ear canal, the ear pad outer surface portion 10b can be easily deformed according to the size, shape, etc. of the ear canal. It has become. An inner housing (second housing) formed by the inner housing 3 and the inner rear housing 4 is accommodated in the first housing, and electroacoustic conversion for generating sound in the second housing. A driver unit 5 as an element is accommodated. The driver unit 5 includes a magnetic circuit, a diaphragm and the like, and has an appropriate known structure.

  The front housing 1 and the rear housing 2 are formed of resin or metal, are integrated with an airtight member 11 such as a silicon ring or a rubber ring, and both are joined with an adhesive so that a driver is provided inside. An accommodation space for the unit 5 is formed, and the driver unit 5 is accommodated therein. A first sound emitting hole 1A is provided on the sound emitting direction side of the driver unit 5 in the front housing 1, and the first sound emitting hole is also provided on the sound emitting direction side of the driver unit 5 in the inner housing 3. A second sound emitting hole 3A is provided corresponding to the sound hole 1A. As a result, the sound generated from the driver unit 5 is emitted from the ear pad 10 tube portion 10a to the outside of the first and second housings via the second and first sound emitting holes 3A and 1A.

  A first waterproof mesh 6 is attached to the front side (sound emission direction side) of the driver unit 5 so as to be mechanically sandwiched between the front housing 1 and the inner housing 3. The first waterproof mesh 6 prevents moisture from entering (water immersion) into the driver unit 5 side, and uses ultrasonic welding to connect the first sound emitting hole 1A of the front housing 1 and the inner housing 3 to the first. 2 is fixed between the two sound emission holes 3A.

  A protector 7 is provided on the front surface of the first sound emitting hole 1 </ b> A at a position corresponding to the first waterproof mesh 6 of the front housing 1. The ear pad 10 is attached to the front outer peripheral portion of the front housing 1 so as to sandwich the protector 7. For attaching the ear pad 10 to the front housing 1, a groove 1B provided on the outer periphery of the sound emitting hole 1A of the front housing 1 and a protrusion 10A provided on the inner periphery of the corresponding position of the ear pad 10 are detachably fitted. It is. Since the outer circumference of the protector 7 is larger than the opening width of the corresponding part of the ear pad 10, the protector 7 is sandwiched between the front housing 1 and the ear pad 10.

  The protector 7 is formed of a hard material such as a plate-like metal or resin having sound emitting holes at the center and the periphery, and is bonded to the front surface of the first sound emitting hole 1A so as to protrude outward. Bonded with adhesive or double-sided tape. The protector 7 functions as a protective member for preventing the first waterproof mesh 6 from being directly exposed to water. The first waterproof mesh 6 is formed by knitting waterproof yarn in a mesh shape, for example, and emits sound from the driver unit 5 as much as possible, but prevents water from entering the interior as much as possible. It is configured.

FIG. 3 is a perspective view of the protector 7. This protector 7 is formed on the inner side of a flange portion 7a that forms a ring shape for attachment formed on the outer peripheral portion, a curved portion 7b that is bent forward and raised inside the flange portion 7a. And a substantially flat flat portion 7c. Opening h ₁ is formed in the center portion of the flat portion 7c. Also, a plurality of apertures h _{2 to} h ₉ are formed at appropriate intervals from the outer curved portion 7b to the flat portion 7c. In this embodiment, there is one central opening h ₁ , and preferably eight openings h _{2 to} h ₉ are formed in the periphery. The diameter of the central aperture h ₁ is a slightly smaller than the diameter of the periphery of the opening h ₂ to h _9. This is because when the opening h ₁ of the central and large water tends to enter the interior, the present invention prevents it. Further, if the protector 7 is formed in a concave dish shape that protrudes rearward, water that has entered easily accumulates in the concave portion, and therefore, in the present invention, the dish shape protrudes forward. Further, the number of the peripheral apertures h _{2 to} h ₉ is preferably eight. If the number is eight or less, it is not preferable in terms of sound emission performance, and if it is eight or more, water tends to enter the inside, which is not preferable. Because.

It should be noted that the number and size of the apertures h _{1 to} h ₉ of the protector 7 are appropriately determined depending on the overall size, usage conditions, and the like, and are not limited to the illustrated examples. Absent.

  In operation, when water enters from the first sound emitting hole 1A as a dynamic load of a jet and directly hits the first waterproof mesh 6, the function may be deteriorated due to deformation. Therefore, in order to prevent such a defect, when water is given by the dynamic load of the jet as shown by an arrow in FIG. 4, it is relaxed by receiving it with the protector 7, and the first waterproof mesh 6 is removed. Protect. By using a hard material for the protector 7, it is difficult to be deformed as compared with a porous member such as a waterproof cloth, a wire mesh, or a screen, so that the waterproof effect and stability can be enhanced.

  The rear housing 2 is provided with a cord lead-out portion 2B, and a cord (earphone cable) 13 electrically connected to the driver unit 5 is led out from the cord lead-out portion 2B to the outside of the first housing. Has been. The rear housing 2 is provided with insert parts (an inner rear housing 4 and a cover 9). A space is formed on the back side of the driver unit 5 by the inner rear housing 4. The cover 9 is provided with a vent hole 12 communicating with a space formed on the back side of the driver unit 5. The opening of the vent hole 12 is exposed from the first and second housings, and a space formed on the back side of the driver unit 5 is connected to a vent path 4A formed in the inner rear housing 4. It communicates with the outside through a vent hole 12 formed in the cover 9.

  This insert part is assembled by ultrasonic welding and an adhesive to prevent the formation of a gap other than the air holes 12 when the rear housing 2 is molded (overmolded). As described above, by using the insert part, it is possible to facilitate the design and reduce the cost when forming the mold of the rear housing 2. In addition, the vent 12 can be provided in a place where the appearance is not conspicuous, and the design can be improved.

  The front housing 1 and the rear housing 2 configured as described above are joined to form a first housing. In this joining, an adhesive is applied to the side surface of the gap between the front housing 1 and the rear housing 2 and then mechanically fitted and integrated through an airtight member 11 such as a silicon ring or a rubber ring. I am doing so. Thus, moisture can be prevented from entering the first housing due to water intrusion, water immersion, and jet flow.

  Next, a method for assembling the above-described headphones will be described. The headphones of this embodiment are completed by assembling the front side and the rear side, and then combining the front side and the rear side.

First, the front side is assembled in the following steps (A) to (D).
(A) The first waterproof mesh 6 is attached to the second sound emitting hole 3A of the inner housing 3 with an adhesive, a double-sided tape or the like.
(B) Thereafter, the outer edge portion of the first waterproof mesh 6 is mechanically sandwiched between the inner housing 3 and the front housing 1, and is fixed by ultrasonic welding.
(C) The driver unit 5 is attached to the inner housing 3 in the front housing 1 with an adhesive or a double-sided tape.
(D) The flange portion 7a of the protector 7 is affixed to the side of the first sound emitting hole 1A of the front housing 1 to which the ear pad 10 is attached with an adhesive or a double-sided tape.

Further, the rear side is assembled by the following steps (E) to (I).
(E) As shown in FIG. 5A, the cover 9 is fixed to the inner rear housing 4 by ultrasonic welding to form an insert part.
(F) The formed insert part is insert-molded in combination with the rear housing 2 as shown in FIGS. 5 (b) and 5 (c).
(G) As shown in FIG.5 (d), the 2nd waterproof mesh 8 is affixed on the space connected to the ventilation path 4A in the rear housing 2, for example using a double-sided tape or an adhesive agent.
(H) An airtight member 11 such as a silicon ring or a rubber ring is attached to the rear housing 2.
(I) A cord (earphone cable) 13 is connected to the rear housing 2 through a cord (earphone cable) 13.

Then, the front and rear housings formed in the steps (A) to (I) are assembled in the steps (J) to (L) below.
(J) Solder the cord passed through the rear housing 2 to the driver unit 5.
(K) An adhesive is applied to the fitting portion between the front housing 1 and the rear housing 2, and the front housing 1 and the rear housing 2 are fitted and assembled.
(L) The ear pad 10 is attached to the front housing 1.

According to the above configuration and assembly method, the following effects can be obtained.
(1) The first waterproof mesh 6 is provided on the front surface of the driver unit 5 so as to prevent water from entering the driver unit 5 side, and the sound emission hole 1A corresponding to the first waterproof mesh 6 of the front housing 1 Since the protector 7 is provided on the front surface, the waterproof performance can be improved and maintained so as not to be directly applied to the first waterproof mesh 6 even when water is applied as a dynamic load of the jet. That is, when a dynamic load of a water jet is applied to the first sound emitting hole 1A of the front housing 1, it is received by the protector 7 provided on the ear pad 10 attachment side of the first sound emitting hole 1A. The first waterproof mesh 6 fixed to the driver unit 5 side of the first sound emitting hole 1A can be protected from deformation.
(2) Since the outer edge portion of the first waterproof mesh 6 is mechanically sandwiched between the front housing 1 and the inner housing 3 and is fixed using ultrasonic welding, the first waterproof mesh 6 is invaded by water intrusion. Can be prevented from peeling off, and the waterproof performance can be stabilized more than fixing without using an adhesive.
(3) The second waterproof mesh 8 can prevent moisture from entering through the air passage 4A, and can stabilize the waterproof performance as in the above (2).
(4) By attaching the cover 9 provided with the vent hole 12 to the inner rear housing 4 by insert molding, the mold design can be facilitated and the vent hole 12 can be provided at a place where the appearance is not conspicuous. So design can be improved.
(5) When the front housing 1 and the rear housing 2 are fitted, the airtight member 11 such as a silicon ring or a rubber ring is interposed in the fitting portion, and the fitting is performed after the adhesive is applied and integrated. It can maintain strength and prevent water from entering.

  Therefore, according to the present invention, it is possible to provide headphones that are stable and have high waterproof performance.

  Although the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention at the stage of implementation. For example, in the above embodiment, insert parts (inner rear housing 4 and cover 9) are provided in order to increase the degree of freedom in design when forming the mold or to provide a vent hole in a place that is not conspicuous in appearance for design reasons. ) Has been described. However, the vent hole 12 may be formed directly in the rear housing 2. At that time, the second waterproof mesh 8 may be attached in the rear housing 2 on the back side of the driver unit 5 in order to prevent water from entering (flooding) from the vent hole 12. For mounting the second waterproof mesh 8 into the rear housing 2, for example, a double-sided tape or an adhesive is used.

  The above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, at least one of the problems described in the column of the problem to be solved by the invention can be solved, and is described in the column of the effect of the invention. In a case where at least one of the effects obtained is obtained, a configuration from which this configuration requirement is deleted can be extracted as an invention.

DESCRIPTION OF SYMBOLS 1 Front housing 1A 1st sound emission hole 1B Groove part 2 Rear housing 2B Code | cord | leading-out part 3 Inner housing 3A 2nd sound emission hole 4 Inner rear housing 4A Ventilation path 5 Driver unit 6 1st waterproof mesh 7 Protector 7a Flange part 7b Curved portion 7c Flat portion h _{1 to} h ₉ Opening portion 8 Second waterproof mesh 9 Cover 10 Ear pad 10a Tube portion 10b Ear pad outer surface portion 10A Protrusion portion 11 Airtight member 12 Vent hole 13 Cord (earphone cable)

Claims (5)

A front housing (1) and a rear housing (2) are joined to form a first housing, and a driver unit (5) is accommodated in the first housing, and is disposed on a front outer peripheral portion of the front housing (1). Headphones with ear pads (10) attached;
A first waterproof mesh (6) secured to the driver unit (5) side of the sound emitting hole (1A) in the front housing (1);
A protector (7) provided on the side of the ear pad (10) attached to the sound emitting hole (1A) of the front housing (1) and protecting the first waterproof mesh (6) from the dynamic load of a water jet. ) And headphones.   An inner housing (3) provided in the first housing and accommodating the driver unit (5) is further provided, and the first waterproof mesh (6) includes the front housing (1) and the inner housing. The headphone according to claim 1, wherein the headphone is sandwiched between (3) and fixed by ultrasonic welding.   An insert part attached to the rear housing (2) is further provided, and the insert part is fixed to the inner housing (3) with an adhesive to form a second housing for accommodating the driver unit (5). An inner rear housing (4) forming a space on the back side of the driver unit (5) and an opening exposed from the first and second housings and formed on the back side of the driver unit (5) The headphone according to claim 2, further comprising a cover (9) having a vent hole (12) communicating with the formed space.   A second waterproof mesh (8) provided in a space formed on the back side of the driver unit (5) in the inner rear housing (4) and bonded to the vent hole (12); The headphone according to claim 3.   An airtight member (11) interposed at a joint surface between the front housing (1) and the rear housing (2) is further provided, and the front housing (1) and the rear housing (2) are provided with the airtight member (11). The headphone according to claim 1, wherein the first housing is formed by being fitted with each other and joined with an adhesive.

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