JP5211023B2 - Earphone microphone - Google Patents

Description

  The present invention includes a microphone unit in the middle of a cord that connects a plug for connection to an earphone and a mobile phone, and the microphone unit is interposed between the cord and a substrate on which the microphone is mounted. The present invention relates to an earphone microphone that includes a microphone housing and a lower microphone housing, and includes a microphone housing that houses the board and draws out the cords on the earphone side and the plug side from both ends of the board.

  This type of earphone microphone attaches to the earphone and plugs into the mobile phone when making a hands-free call with a mobile phone, or when listening to music using a mobile phone in a train while commuting, for example. The appearance quality of the microphone unit that is the most conspicuous part from the usage is important, but on the other hand, for integrating the upper microphone housing and the lower microphone housing, for example, mutual Coupling means such as screwing with bolts and nuts that can be screwed together, latching with engaging protrusions and engaging grooves that can be engaged and disengaged with each other, and fixing with adhesives are problems in terms of appearance quality and assembly of the microphone unit. It becomes.

  That is, since the coupling means is exposed on the outer surface of the microphone unit, the appearance quality of the microphone unit is degraded. In addition, since there is a restriction in designing the microphone unit by the coupling means, it is difficult to improve the appearance quality of the microphone unit. Furthermore, the number of assembly steps of the microphone unit is increased by the coupling means, and particularly when using an adhesive, there is a concern that the adhesive may protrude outside the microphone unit. To do.

  In addition to such a coupling means, a cord bushing for preventing the cord from being disconnected due to bending with a very small bending radius at both ends of the microphone unit is a problem in terms of appearance quality and assembly of the microphone unit. .

  That is, the cord bushing is required to have a bending characteristic that it is small on the root side fitted and fixed to the microphone housing and larger on the tip side than the root side. In order to obtain such a bending characteristic, normally, as disclosed in Patent Document 1, the cord bushing is an outer periphery that is tapered from the root side to be fitted and fixed in the housing toward the tip side. It is necessary to provide a plurality of circumferential grooves at a predetermined pitch in a bellows shape, and the appearance quality of the microphone unit deteriorates due to the bellows shape of the cord bushing. In addition, since the design of the microphone unit is restricted by the cord bushing, it is difficult to improve the appearance quality of the microphone unit. Furthermore, since the bushing for cords has reduced flexibility (flexibility) at the base side where it is fitted and fixed in the housing in the first place, after combining the upper microphone housing and the lower microphone housing, The root side cannot be fitted and fixed, and the combination of the upper microphone housing and lower microphone housing and the fitting and fixing of the cord bushing to the microphone housing must be performed simultaneously and at the same time. Therefore, the assemblability of the microphone unit is degraded.

  By the way, Patent Document 1 discloses a technique for obtaining a bending characteristic required for a cord bushing formed from one kind of resin material, whereas Patent Document 2 discloses two kinds of resins having different hardnesses. A technique is disclosed in which a cord bushing is formed using a material to obtain a required bending characteristic without making the cord bushing bellows.

  That is, the cord bushing disclosed in Patent Document 2 is formed of a high-hardness material on the base side to be fitted and fixed in the housing, and the tip side is made of a low-hardness material having a lower hardness than the high-hardness material. On the base side where it is formed or fitted and fixed in the housing, the composition ratio of the high hardness part to the low hardness part is increased, and on the tip side, the composition ratio of the low hardness part to the high hardness part is increased. Or the bushing for cords is required without making it bellows by gradually decreasing the component ratio of the high hardness part to the low hardness part from the root side to the front end side where it is fitted and fixed in the housing. The bending property is obtained. Further, by making the hardness of the base side of the cord bushing higher than the hardness of the tip end, connection characteristics that can prevent the cord bushing from coming off from the housing can be obtained at the same time.

  In addition, it has a high hardness part formed from a high hardness material and a low hardness part formed from a low hardness material whose hardness is lower than that of a high hardness material. On the side, the configuration of the cord bushing that increases the flexibility is also disclosed in Patent Document 3.

JP-A-9-115368 Japanese Patent Application No. 2009-176615 Japanese Patent No. 3989453

  The conventional cord bushing disclosed in Patent Document 2 can solve the problem that the appearance quality of the microphone unit deteriorates due to the cord bushing. However, the problem that the assembling property of the microphone unit is lowered due to the cord bushing and the appearance quality and assembling property of the microphone unit are lowered due to the coupling means between the upper microphone housing and the lower microphone housing cannot be solved. Therefore, there is a demand for an earphone microphone that can easily improve the appearance quality and assembly of the microphone unit.

  The present invention has been made in view of the above problems, and uses a cord bushing having a bending characteristic equivalent to the conventional one without reducing the appearance quality of the microphone unit, and also having a connection characteristic with a microphone housing, An object of the present invention is to provide an earphone microphone capable of improving the appearance quality and assembling property of a microphone unit by combining and integrating an upper microphone housing and a lower microphone housing.

  In order to solve the above-described problems, the present invention includes a microphone unit in the middle of a cord connecting an earphone and a plug for connection to a mobile phone, the microphone unit being interposed between the microphone and the cord, In an earphone microphone including a substrate to be mounted, an upper microphone housing, and a lower microphone housing, and a microphone housing that houses the substrate and draws out the cords on the earphone side and the plug side from both ends of the substrate from both ends. And a cord bushing that is externally fitted and fixed to both ends of the microphone housing, and the microphone housing includes a housing main body having an inner and outer two-layer structure that houses the substrate, and an inner side of the housing main body. Layer part on both ends of outer layer part A bushing joint portion having a single layer structure formed by a protruding portion, and the cord bushing includes a root side portion of an inner / outer two-layer structure that fits outside the bushing joint portion, and an outer side of the root side portion. A front end side portion of a single layer structure formed by a portion protruding from one end portion of the inner layer portion, the inner layer portion of the housing main body portion in the microphone housing, the bushing joint portion, and the cord An inner layer portion of the base side portion of the bushing for use is made of a high-hardness resin material, an outer layer portion of the housing main body portion of the microphone housing, and an outer layer portion of the base side portion of the cord bushing, And the said front end side part is formed with the low-hardness resin material whose hardness is lower than the said high-hardness resin material.

  By adopting such a configuration, it is possible to obtain a cord bushing having a bending characteristic equivalent to the conventional one and a characteristic of connecting to the microphone housing without deteriorating the appearance quality of the microphone unit. Thereby, the problem that the appearance quality of the microphone unit is deteriorated due to the bushing for the cord can be solved.

  Also, after combining the upper microphone housing and lower microphone housing, the base side of the cord bushing is externally fitted to the bushing joints at both ends of the microphone housing, and the cord bushing is fitted and fixed to both ends of the microphone housing can do. By fitting and fixing the cord bushing to both ends of the microphone housing, the upper microphone housing and the lower microphone housing can be coupled and integrated. As a result, it is not necessary to simultaneously fit and fix the combination of the upper microphone housing and the lower microphone housing and the cord bushing to both ends of the microphone housing, and the cord bushing is a means for connecting the upper microphone housing and the lower microphone housing. This also eliminates the need for the coupling means. As a result, it is possible to solve the problem that the assembling property of the microphone unit is lowered due to the cord bushing and the appearance quality and assembling property of the microphone unit are lowered due to the coupling means between the upper microphone housing and the lower microphone housing. .

  Further, both the microphone housing and the cord bushing are formed of a low-hardness resin material on the outer surface, and the texture of the microphone unit can be unified. Thereby, the bushing for cords is not conspicuous, and the sense of unity of the microphone unit can be improved.

  Further, in the present invention, when the base portion of the cord bushing includes a fitting portion into which the bushing joint portion is fitted, and a non-fitting portion protruding from the tip of the bushing joint portion, With this configuration, when the cord bushing is externally fitted to the bushing joints at both ends of the microphone housing, from the fitting portion at the base side to the tip at the tip side portion, the cord bushing gradually goes from three layers to two layers through a single layer. The number of layers is reduced, and the flexibility of the cord bushing is small at the fitting portion at the base side portion, and can be increased stepwise from the tip portion toward the tip end at the tip side portion. Thereby, the bending characteristic of the cord bushing can be further improved.

  Further, in the present invention, when the cord bushing is externally fitted to the bushing joint portion, between the inner surface of the root side portion of the cord bushing and the outer surface of the bushing joint portion, When the cord bushing is provided with a pair of locking recesses and locking projections for preventing the cord bushing from coming off, this configuration allows the cord bushing to be externally fitted to the bushing joints at both ends of the microphone housing. It can be prevented from coming off only by being fitted and fixed to the microphone housing. As a result, the connection characteristics of the cord bushing with the microphone housing and the assembly of the microphone unit can be further improved.

  Further, in the present invention, when a ring groove is provided on the inner surface of the bushing joint portion, and a caulking metal fitting to the cord is fitted into the ring groove, this configuration allows the tension to act on the cord. The tension can be received by the strong portion of the microphone housing without acting on the cord bushing, that is, the bushing joint portion on which the cord bushing is fitted. Accordingly, it is possible to prevent inconveniences such as the cord bushing coming off due to the tension acting on the cord, the cord being separated from the substrate, and the microphone housing being cracked.

  According to the present invention, a cord bushing having a bending characteristic equivalent to the conventional one without reducing the appearance quality of the microphone unit and also having a connection characteristic with the microphone housing is used. By combining and integrating, it is possible to provide an earphone microphone capable of improving the appearance quality and assembly of the microphone unit.

It is the (A) front view of the earphone microphone which shows one Embodiment of this invention, (B) The right view. It is sectional drawing of the microphone unit with which the earphone microphone shown to FIG. 1 (A) and (B) is equipped. FIG. 3 is a cross-sectional view of one bushing joint portion of a microphone housing provided in the microphone unit shown in FIG. 2 and one cord bushing before being fitted therein.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1A is a front view and FIG. 1B is a right side view of an earphone microphone 1 according to an embodiment of the present invention.

  As shown in FIGS. 1A and 1B, an earphone microphone 1 includes an earphone 2 as a receiver, a plug 3 for connection to a mobile phone (not shown), a microphone unit 4 as a transmitter, The earphone 2 is provided at one end of the cord 5, and the plug 3 is provided at the other end of the cord 5, and further connects the earphone 2 and the plug 3. A microphone unit 4 is provided in the middle of the cord 5, a small hole 6 serving as a mouthpiece is opened at the front center of the microphone unit 4, and a clip 7 is attached to the back side of the microphone unit 4. The earphone microphone 1 has an earphone 2 attached to an ear and a plug 3 connected to the mobile phone when a hands-free call is performed on the mobile phone, and more preferably, the microphone unit 4 is fastened around the neck by a clip 7. Used as a handset. Of course, when listening to music using a mobile phone in a train on the way to work, for example, it simply functions as an earphone, and can be used as an earphone even if connected to a portable audio device other than a mobile phone, for example It is. Here, the microphone unit 4 also serves as a so-called remote controller, and a hook button 8 and a volume button 9 (an example of an operation function mounted on the microphone unit 4) are provided on the right side surface of the microphone unit 4. Even when the phone is in a pocket or bag, you can receive or hang up the phone by simply pressing the hook button 8 or press the volume button 9 It is possible to adjust the volume of the earphone 2 by raising or lowering it.

  FIG. 2 is a cross-sectional view of the microphone unit 4 provided in the earphone microphone 1 shown in FIGS. 1 (A) and 1 (B).

  As shown in FIG. 2, the microphone unit 4 includes a microphone 10, a hook switch (not shown) having a hook button 8 as an operation part, a volume switch (not shown) having a volume button 9 as an operation part, a substrate 11, and a microphone unit. 4, an upper microphone housing 12 on the front side, a lower microphone housing 13 on the back side of the microphone unit 4, an earphone side cord bushing 14, and a plug side cord bushing 15.

  The substrate 11 is configured by a rectangular plate-like printed circuit board, and is interposed in the middle of the cord 5. That is, the cord 5 is divided into the earphone side cord 5a and the plug side cord 5b with the substrate 11 as a boundary, and the core wire exposed from the end of the earphone side cord 5a on the microphone unit 4 side is the longitudinal direction of the substrate 11 The core wire exposed from the end of the plug-side cord 5b on the microphone unit 4 side is solder-connected to the other end of the substrate 11 in the longitudinal direction. In this way, the earphone side cord 5a and the plug side cord 5b of the cord 5 are unified by the substrate 11, and the substrate 11 is interposed in the middle of the cord 5, and the microphone 11, hook switch, volume switch, Are mounted together with an IC chip (integrated circuit) and other circuit components.

  The upper microphone housing 12 and the lower microphone housing 13 constitute a microphone housing having a split structure. The upper microphone housing 12 includes an upper housing body portion 16 having an inner and outer two-layer structure and an inner layer of the upper housing body portion 16. The earphone side upper bushing joint portion 19 having a single layer structure formed by a portion of the outer layer portion 18 protruding from the end portion on the earphone side of the outer layer portion 18, and the inner layer portion 17 of the upper housing main body portion 16 are connected to the outer layer portion 18 A plug-side upper bushing joint portion 20 having a single layer structure formed by a portion protruding from the plug-side end portion is provided, and the lower microphone housing 13 includes a lower housing main body portion 21 and an inner / outer two-layer structure. The inner layer portion 22 of the lower housing main body portion 21 is protruded from the earphone side end portion of the outer layer portion 23. A single layer structure plug formed by a formed single layer structure earphone side lower bushing joint portion 24 and a portion in which the inner layer portion 22 of the lower housing main body portion 21 protrudes from the plug side end portion of the outer layer portion 23. A lower bushing joint portion 25 is provided.

  The upper housing main body portion 16 and the lower housing main body portion 21 sandwich the substrate 11 from above and below by a plurality of ribs 26 and 27 formed inwardly projecting from the inner layer portions 17 and 22, and together with the substrate 11, the microphone 10 and the hook switch. And a box-shaped housing main body for housing the volume switch and other mounting parts. A small hole 6 is formed in the central portion of the upper housing main body 16 so as to penetrate the inner and outer surfaces, and a microphone 10 is installed inside the small hole 6. Further, a pair of brackets 28 are formed in the inner layer portion 22 of the lower housing main body portion 21 so as to penetrate the outer layer portion 23 and protrude to the back side of the housing main body portion. Between the pair of brackets 28, an intermediate portion of the clip 7 is supported through a fulcrum pin (not shown) so as to allow seesaw motion. The clip 7 is always urged so as to press the tip of the clip 7 against the outer surface of the lower housing main body 21 by a torsion coil spring in which the coil portion is fitted on the fulcrum pin.

  The earphone-side upper bushing joint portion 19 and the earphone-side lower bushing joint portion 24 constitute a tapered tubular earphone-side bushing joint portion that projects along the extending direction of the cord 5 from the earphone-side end portion of the housing main body portion. The earphone side cord 5a is drawn out from the inside of the housing main body through the earphone side bushing joint. An earphone-side upper locking projection 29 is formed on the outer surface of the root side of the earphone-side upper bushing joint portion 19, and an earphone-side lower locking projection is formed on the outer surface of the earphone-side lower bushing joint portion 24. 30 is formed, and the earphone-side upper locking projection 29 and the earphone-side lower locking projection 30 constitute a ring-shaped locking projection on the outer surface on the root side of the earphone-side bushing joint. . Further, an earphone side upper ring groove 31 is formed on the inner surface of the base side of the earphone side upper bushing joint portion 19, and an earphone side lower ring groove 32 is formed on the inner surface of the earphone side lower bushing joint portion 24. The side upper ring groove 31 and the earphone side lower ring groove 32 constitute an earphone side ring groove on the inner surface on the root side of the earphone side bushing joint portion. A caulking metal fitting 33 for caulking and fixing the earphone side cord 5a from above the outer skin is fitted into the earphone side ring groove.

  The plug-side upper bushing joint portion 20 and the plug-side lower bushing joint portion 25 are tapered tubes that protrude in the opposite direction coaxially with the earphone-side bushing joint portion along the extending direction of the cord 5 from the plug-side end portion of the housing main body portion. A plug-side bushing joint portion having a shape is formed, and the plug-side cord 5b is drawn out from the inside of the housing main body portion through the plug-side bushing joint portion. Further, a plug-side upper locking projection 34 is formed on the outer surface of the base side of the plug-side upper bushing joint portion 20, and a plug-side lower locking projection is formed on the outer surface of the base side of the plug-side lower bushing coupling portion 25. 35 is formed, and the plug-side upper locking projection 34 and the plug-side lower locking projection 35 constitute a ring-shaped locking projection on the outer surface on the base side of the plug-side bushing joint. . Further, a plug-side upper ring groove 36 is formed on the inner surface on the base side of the plug-side upper bushing joint portion 20, and a plug-side lower ring groove 37 is formed on the inner surface of the plug-side lower bushing joint portion 25. The side upper ring groove 36 and the plug side lower ring groove 37 constitute a plug side ring groove on the inner surface of the base side of the plug side bushing joint. In this plug-side ring groove, a caulking metal fitting 38 that is caulked and fixed to the plug-side cord 5b from above the outer skin is fitted.

  Thus, the upper microphone housing 12 and the lower microphone housing 13 include a housing main body portion having an inner and outer two-layer structure at an intermediate portion, a single-layer earphone bushing joint portion at an earphone side end portion, and a plug side end portion. A microphone housing having a single-layered plug-side bushing joint is formed.

  The upper microphone housing 12 is made of a high-hardness resin material, for example, an ABS (acrylonitrile-butadiene-styrene) resin, a PC (polycarbonate) resin, or an alloy of an ABS resin and a PC resin having a hardness (Shore hardness: HS) of 85. An upper microphone integrally including an inner layer portion 17 of the upper housing main body portion 16, an earphone-side upper bushing joint portion 19, and a plug-side upper bushing joint portion 20 by injection molding using a resin upper microphone housing primary molding die. The primary molded product of the housing 12 is molded, and then the primary molded product of the upper microphone housing 12 is put into a mold for secondary molding of the upper microphone housing, where the hardness is lower than that of the high-hardness resin material. Hardness resin material, for example, the hardness (Shore hardness: HS) is set to 70, for example heatable Of the upper microphone housing 12 in which the outer layer portion 18 of the upper housing main body portion 16 is integrally laminated on the outer surface of the inner layer portion 17 of the upper housing main body portion 16 by insert molding for injecting a conductive elastomer (TPE) resin. It is formed by molding a molded product (finished product of the upper microphone housing 12).

  The lower microphone housing 13 is also formed by injection molding using a lower microphone housing primary molding die with the same high-hardness resin material as the upper microphone housing 12, and the inner layer portion 22 of the lower housing main body portion 21 and the lower earphone side lower bushing joint portion 24 and A primary molded product of the lower microphone housing 13 that is integrally provided with the plug-side lower bushing joint portion 25 is molded. Next, the primary molded product of the lower microphone housing 13 is molded into a lower microphone housing secondary molding die. The outer layer portion 23 of the lower housing body portion 21 is integrated with the outer surface of the inner layer portion 22 of the lower housing body portion 21 by insert molding in which the same low-hardness resin material as that of the upper microphone housing 12 is injected. Secondary molded product of the lower microphone housing 13 formed by lamination (lower microphone how And it is formed by molding a finished product) of the ring 13.

  FIG. 3 is a cross-sectional view of one (plug side) bushing joint portion of the microphone housing provided in the microphone unit 4 shown in FIG. 2 and one (plug side) cord bushing 15 before being fitted therein.

  As shown in FIG. 2, the earphone-side cord bushing 14 is connected to the earphone-side end portion of the microphone housing by the earphone-side upper bushing joint portion 19 of the upper microphone housing 12 and the earphone-side lower bushing joint portion 24 of the lower microphone housing 13. The plug-type cord bushing 15 is a cap-type bushing that is externally fitted and fixed to the configured earphone-side bushing joint portion. The plug-side cord bushing 15 is formed by connecting the plug-side upper bushing joint portion 20 of the upper microphone housing 12 and the lower microphone housing 13. The cap-side bushing 14 is connected to the plug-side bushing joint portion formed at the plug-side end portion of the microphone housing with the plug-side lower bushing joint portion 25. Code bushing 15 is exactly the same A.

  As shown in FIGS. 2 and 3, the cord bushings 14 and 15 include a tapered cylindrical root side portion 39 having an inner and outer two-layer structure that fits outside the bushing joint portion, and an outer layer portion of the root side portion 39. And a cylindrical-shaped distal end side portion 42 having a single-layer structure formed by a portion protruding from the distal end portion of the inner layer portion 41.

  Further, the base side portions 39 of the cord bushings 14, 15 have an axial length sufficiently longer than the axial length of the bushing joint portion, and the base side portions 39 of the cord bushings 14, 15 are provided. Are provided with a fitting portion 43 into which the bushing joint portion is fitted, and a non-fitting portion 44 protruding from the tip of the bushing joint portion, and the upper housing body portion 16 and the lower microphone housing in the upper microphone housing 12. Earphones that are fitted and fixed by being externally fitted into the earphone side bushing joint portion from the inside of the housing main body portion that is formed in the middle portion of the microphone housing with the lower housing main body portion 13. The earphone side cord 5 a passes through the non-fitting portion 44 and the tip side portion 42 of the side cord bushing 14 and is attached to the outside of the microphone unit 4. The earphone side cord 5a is covered by the non-fitting portion 44 and the distal end side portion 42 of the earphone side cord bushing 14, and from the inside of the housing main body to the plug side bushing joint portion, and further to the plug side bushing joint. The plug-side cord 5b is drawn out of the microphone unit 4 through the non-fitting portion 44 and the distal end side portion 42 of the plug-side cord bushing 15 that is externally fitted and fixed to the plug-side cord bushing. The 15 non-fitting parts 44 and the tip side part 42 cover the earphone side cord 5a.

  Further, on the inner surface of the root side portion 39 of the cord bushings 14 and 15, the earphone side upper locking projection 29 formed on the outer surface of the root side of the earphone side upper bushing joint portion 19 and the earphone side lower bushing joint are formed. Ring-shaped locking projections and plug-side upper bushing joints formed on the outer surface of the base side of the earphone side bushing joint portion with the earphone side lower locking projection portion 30 formed on the outer surface of the root side of the portion 24 The plug-side upper locking projection 34 formed on the outer surface of the root side of the portion 20 and the plug-side lower locking projection 35 formed on the outer surface of the plug-side lower bushing joint portion 25 on the plug side The bushing joint portion is fitted to the ring-shaped locking convex portion formed on the outer surface of the base side of the bushing joint portion when the base side portion 39 of the cord bushings 14 and 15 is externally fitted to the bushing joint portion. The locking projection A ring-shaped locking recess 45 for performing retaining de bushing 14, 15 is formed. Here, the locking concave portion 45 may be formed on the bushing joint portion side, and the locking convex portion may be formed on the cord bushings 14 and 15 side.

  Such cord bushings 14 and 15 are made of high-hardness resin material, for example, ABS (acrylonitrile-butadiene-styrene) resin, PC (polycarbonate) resin, or ABS resin whose hardness (Shore hardness: HS) is set to 85. A primary molded product of the cord bushings 14 and 15 having only the inner layer portion 41 of the base side portion 39 is formed by injection molding using a primary molding die for cord bushing of PC resin alloy resin. Further, the primary molded product of the cord bushing 14, 15 is placed in a cord bushing secondary molding die, and there is a low hardness resin material having a lower hardness than the high hardness resin material, for example, hardness (Shore hardness). : HS) is set to 70, for example, an inner layer of the root side portion 39 by insert molding injecting a thermoplastic elastomer (TPE) resin. A secondary of the cord bushings 14, 15 in which the outer layer portion 40 of the root side portion 39 is integrally laminated on the outer surface of 41, and the tip side portion 42 is integrally formed on the outer layer portion 40 of the root side portion 39. It is formed by molding a molded product (completed product of the cord bushings 14, 15). Here, of the two types of high-hardness resin materials and low-hardness resin materials having different hardnesses used for the cord bushings 14 and 15, the high-hardness resin material has high hardness used for the upper microphone housing 12 and the lower microphone housing 13. Different types of materials can be used as long as they have the same degree of hardness as the resin material, and the low-hardness resin material is the appearance and tactile sensation of the microphone housing portion and the cord bushings 14 and 15 in the microphone unit 4. In order to unify the texture such as, it is preferable to use the same low-hardness resin material used for the upper microphone housing 12 and the lower microphone housing 13.

  Thus, the earphone microphone 1 includes the microphone unit 4 in the middle of the cord 5 that connects the earphone 2 and the plug 3 for connection to the mobile phone. The microphone unit 4 is interposed between the microphone 10 and the cord 5, A microphone 11 comprising a substrate 11 on which a microphone 10 is mounted, an upper microphone housing 12 and a lower microphone housing 13 is housed. The microphone 11 houses the substrate 11 and pulls out the earphone side and plug side cords 5a and 5b from the both ends. A cord bushing 14 and 15 that is fitted and fixed to both ends of the microphone housings 12 and 13, and the microphone housings 14 and 15 have an inner and outer two-layer structure in which the substrate 11 is housed. Housing main body parts 16, 21 and the housing book A bushing joint portion 19, 24, 20, 25 having a single-layer structure that is formed by protruding the inner layer portions 17, 22 of the portions 16, 21 from both end portions of the outer layer portions 18, 23. 14 and 15, a base side portion 39 of an inner / outer two-layer structure that fits outside the bushing joint portions 19, 24, 20, and 25, and an outer layer portion 40 of the root side portion 39 project from one end portion of the inner layer portion 41. A tip end side portion 42 having a single layer structure formed by the portion formed, and inner layer portions 17 and 22 of the housing main body portions 16 and 21 in the microphone housings 12 and 13 and bushing joint portions 19, 24, 20 and 25, , The inner layer portion 41 of the base side portion 39 of the cord bushings 14 and 15 is made of a high-hardness resin material, and the housing body in the microphone housings 12 and 13 The outer layer portions 18 and 23 of the cords 16 and 21 and the outer layer portion 40 and the tip end side portion 42 of the root side portion 39 of the cord bushings 14 and 15 are made of a low-hardness resin material whose hardness is lower than that of the high-hardness resin material. Is formed by.

  With this configuration, the bending quality equivalent to the conventional one (without the cord bushings 14 and 15 being made bellows-like) without deteriorating the appearance quality of the microphone unit 4 (on the root side fitted and fixed to the microphone housings 12 and 13) It is small and has a bending characteristic that the tip side is larger than the root side), and the connection characteristic with the microphone housings 12 and 13 (the cord bushings 14 and 15 have a base side hardness higher than the tip side hardness, The cord bushings 14 and 15 having connection characteristics that can prevent the bushings 14 and 15 from being removed from the microphone housings 12 and 13 can be obtained. Thereby, the problem that the appearance quality of the microphone unit 4 is lowered by the cord bushings 14 and 15 can be solved.

  After the upper microphone housing 12 and the lower microphone housing 13 are combined, the base side portions 39 of the cord bushings 14, 15 are removed from the bushing joint portions 19, 24, 20, 25 at both ends of the microphone housings 12, 13. The cord bushings 14 and 15 can be fitted and fixed to both ends of the microphone housings 12 and 13. By fitting and fixing the cord bushings 14 and 15 to both ends of the microphone housings 12 and 13, the upper microphone housing 12 and the lower microphone housing 13 can be combined and integrated. Accordingly, it is not necessary to simultaneously fit and fix the combination of the upper microphone housing 12 and the lower microphone housing 13 and the cord bushings 14 and 15 to both ends of the microphone housings 12 and 13, and the cord bushings 14 and 15 It also serves as a coupling means between the upper microphone housing 12 and the lower microphone housing 13, and the coupling means is unnecessary. Accordingly, the assembling property of the microphone unit 4 is lowered by the cord bushings 14 and 15, and the appearance quality and assembling property of the microphone unit 4 are lowered by the coupling means between the upper microphone housing 12 and the lower microphone housing 13. The problem can be solved.

  Further, the microphone housings 12 and 13 and the cord bushings 14 and 15 are all formed from a low-hardness resin material on the outer surface, so that the texture of the microphone unit 4 can be unified as a whole. Thereby, the bushings 14 and 15 for cords are not conspicuous, and the unity feeling of the microphone unit 4 can be improved.

  In addition, the earphone microphone 1 includes a fitting portion 43 in which the bushing joint portions 19, 24, 20, 25 are fitted to the base side portions 39 of the cord bushings 14, 15, and the bushing joint portions 19, 24, 20, 25. And a non-fitting portion 44 that protrudes from the tip. With this configuration, the cord bushings 14 and 15 are fitted from the fitting portion 43 of the root side portion 39 to the tip side portion when the microphone housings 12 and 13 are externally fitted to the bushing joint portions 19, 24, 20 and 25. The number of layers gradually decreases from three layers through two layers to a single layer from the tip of 42, and the flexibility of the bushings 14 and 15 for cords is small at the fitting portion 43 of the root side portion 39, and from there to the tip It can be enlarged step by step toward the tip of the side portion 42. As a result, the bending characteristics of the cord bushings 14, 15 can be further improved.

  Further, the earphone microphone 1 is fitted to each other when the cord bushings 14 and 15 are externally fitted to the bushing joint portions 19, 24, 20 and 25, and the bushing 14 and the inner surface of the base side portion 39 of the bushings 14 and 15. A pair of locking recesses 45 and locking protrusions 29, 30, 34, 35 for preventing the cord bushings 14, 15 from coming off between the outer surfaces of the joint portions 19, 24, 20, 25. I have. With this configuration, the cord bushings 14 and 15 are prevented from coming off only by external fitting to the bushing joint portions 19, 24, 20 and 25 at both ends of the microphone housings 12 and 13, and are fitted into the microphone housings 12 and 13. Can be fixed. As a result, the connection characteristics of the cord bushings 14 and 15 with the microphone housings 12 and 13 and the assembly of the microphone unit 4 can be further improved.

  The earphone microphone 1 includes ring grooves 31, 32, 36, and 37 on the inner surfaces of the bushing joint portions 19, 24, 20, and 25. The ring grooves 31, 32, 36, and 37 are connected to the cords 5a and 5b. The caulking metal fitting 38 is fitted. With this configuration, when tension is applied to the cords 5 a and 5 b, the strength of the microphone housings 12 and 13 without applying the tension to the cord bushings 14 and 15, that is, the cord bushings 14 and 15. Can be received by the bushing joint portions 19, 24, 20, and 25 that are externally fitted. This prevents inconveniences such as the cord bushings 14, 15 coming off due to the tension acting on the cords 5a, 5b, the cords 5a, 5b being separated from the substrate, and the microphone housings 12, 13 being cracked. Can do.

  Therefore, the cord bushings 14 and 15 having the same bending characteristics as the conventional one without reducing the appearance quality of the microphone unit 4 and also having the connection characteristics with the microphone housings 12 and 13 are used. By combining and integrating the lower microphone housings 13 with each other, it is possible to provide the earphone microphone 1 capable of improving the appearance quality and assembly of the microphone unit 4.

  As mentioned above, although this embodiment demonstrated one preferred embodiment of this invention by the earphone microphone 1, this invention is not limited to it, Various modifications can be implemented within the range which does not deviate from the summary.

DESCRIPTION OF SYMBOLS 1 Earphone microphone 2 Earphone 3 Plug 4 Microphone unit 5 Cord 5a Earphone side cord 5b Plug side cord 10 Microphone 11 Substrate 12 Upper microphone housing 13 Lower microphone housing 14 Earphone side cord bushing 15 Plug side cord bushing 16 Upper housing body 17 Inner layer part 18 Outer layer part 19 Earphone side upper bushing joint part 20 Plug side upper bushing joint part 21 Lower housing body part 22 Inner layer part 23 Outer layer part 24 Earphone side lower bushing joint part 25 Plug side lower bushing joint part 29 Earphone Side upper locking projection 30 Earphone side lower locking projection 31 Earphone side upper ring groove 32 Earphone side lower ring groove 33 Caulking fitting 34 Plug side locking projection 35 Plug side locking projection 36 Plug Side upper ring groove 37 Plug side lower ring groove 38 Caulking fitting 39 Root side part 40 Outer layer part 41 Inner layer part 42 Tip side part 43 Fitting part 44 Non-fitting part 45 Locking concave part

Claims (4)

A microphone unit is provided in the middle of the cord connecting the earphone and the plug for connecting to the mobile phone.
The microphone unit includes a microphone, a substrate interposed between the cords and mounting the microphone, an upper microphone housing, and a lower microphone housing. The microphone unit houses the substrate, and from the substrate to the earphone side. In an earphone microphone including a microphone housing that pulls out each cord on the plug side from both ends,
A cord bushing that is externally fitted and fixed to both ends of the microphone housing is provided.
The microphone housing has a single-layer bushing joint formed by a housing main body portion having an inner and outer two-layer structure in which the substrate is housed and an inner layer portion of the housing main body portion projecting from both ends of the outer layer portion. With
The cord bushing has a single layer formed by a base side portion of an inner / outer two-layer structure that is fitted on the bushing joint portion, and an outer layer portion of the base side portion that protrudes from one end portion of the inner layer portion. With the tip side of the structure,
The inner layer portion of the housing body portion in the microphone housing, the bushing joint portion, and the inner layer portion of the root side portion in the cord bushing are formed of a high-hardness resin material,
A low-hardness resin material having a lower hardness than the high-hardness resin material, the outer layer portion of the housing main body portion in the microphone housing, the outer layer portion of the root side portion and the tip side portion in the cord bushing Earphone microphone characterized by being formed by.   2. The base portion of the cord bushing is provided with a fitting portion into which the bushing joint portion is fitted, and a non-fitting portion protruding from the tip of the bushing joint portion. The earphone microphone described in 1.   The cord bushings are fitted to each other when the cord bushings are externally fitted to the bushing joints, and the cord bushings are arranged between an inner surface of the root side portion of the cord bushings and an outer surface of the bushing joints. The earphone microphone according to claim 1, further comprising a pair of locking concave portions and locking convex portions for preventing the slipping out of the earphone.   The earphone microphone according to claim 1, wherein a ring groove is provided on an inner surface of the bushing joint portion, and a caulking fitting to the cord is fitted into the ring groove.

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