JP2016082284A - Battery built-in headphone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air chamber having a large volumetric capacity, which is not limited by the size of a battery, in a thin housing.SOLUTION: A battery built-in headphone includes: a cover 12 including a sound emission part 15; an internal housing 13 forming an air chamber 18 between itself and the cover; a recessed part 13b provided within the internal housing; and a storage part 19 which houses a storage object at a side of the internal housing which is opposite to the cover. When the storage object is housed in the storage part, the storage object is disposed facing the recessed part.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a battery built-in headphone.

  2. Description of the Related Art Headphones with a built-in battery in which a battery (rechargeable battery) and a circuit board are housed inside a housing of the headphones are known. Such headphones include, for example, a noise canceling headphone having a noise canceling circuit and a headphone (wireless headphone) having a wireless communication circuit typified by BlueTooth (registered trademark). At the present time when music can be easily enjoyed on the go, the demand for such headphones is increasing. In addition, small and thin headphones are required for easy carrying.

  The noise canceling headphones can provide the user with enjoyment of music regardless of the surrounding noise environment. Furthermore, it may be used to reduce the stress that a noise environment such as in an airplane or a train gives to passengers.

  The wireless headphones do not require a connection cord with a playback device or the like (for example, an audio player or an audio amplifier) that is essential in conventional headphones. For this reason, wireless headphones have solved the problems of conventional headphones, such as the cords obstructing the movement of the user or the cords being disconnected by being caught by people or objects.

  FIGS. 6A and 6B show an example of headphones incorporating a battery such as the noise canceling headphones. The housing 111 of the headphone 101 includes a cover 112, an internal housing 113, a case 114, a driver unit 117, and a battery 119.

  The cover 112 (also referred to as a baffle) is a disk-like member having the sound emitting unit 115 and the ear pad 110 shown in FIG. There is a driver unit 117 between the cover 112 and the internal housing 113. The driver unit 117 converts the electrical signal input to the headphones 101 into an audio signal. The sound emitting unit 115 is a plurality of holes for emitting the sound signal.

  A space between the inner housing 113 and the driver unit 117 is an air chamber 118. The volume and shape of the air chamber 118 are designed so that the diaphragm of the driver unit 117 sufficiently vibrates based on the electric signal. In addition, the inner housing 113 includes a through hole 116 that communicates the outside of the housing 111 with the air chamber 118. The through-hole 116 is in the upper part of the side surface of the internal housing 113 (upper side when the headphones 101 are used). The position and size of the through-hole 116 are designed so that the diaphragm vibrates sufficiently.

  Therefore, it is desirable that the through hole 116 and the air chamber 118 are provided so as to maximize the performance of the diaphragm or based on the specifications of the headphones.

  As shown in FIG. 7, the case 111 of the battery built-in headphones has a battery 119 between the internal case 113 and the case 114. Batteries are becoming smaller and larger in capacity. However, in order to satisfy the discharge capacity of a battery used for noise canceling headphones or the like, a battery having a certain volume is required. For this reason, the selection and arrangement of the battery has been an important design factor in the battery-equipped headphones. For example, when the air chamber 118 and the battery 119 are arranged in the direction of the sound output axis of the driver unit 117, the thickness of the housing 111 increases. In addition, the size of the air chamber 118 is limited according to the size of the battery 119. Since the through hole 116 needs to be provided at a position where the battery 119 is not present, the position of the through hole 116 is also limited depending on the position of the battery 119. That is, in the case where the battery 119 is on the sound output shaft in which the capacity of the housing 111 is relatively easy to secure, the through hole 116 cannot be provided on the sound output shaft. The restriction on the arrangement of the through holes 116 was a factor that partially lost the balance of the acoustic stiffness of the air chamber 118. As described above, the design limitation due to the size and arrangement of the battery has also affected the sound quality of the headphones.

  Therefore, there is a need for a battery built-in headphone that can provide a large volume air chamber that is not limited by the size of the battery even in a small and thin casing.

  So far, for example, a headphone having a battery housing portion having the same shape as the right speaker portion and a left and right cavity in the same shape as the right speaker portion has been disclosed in the left speaker portion that does not contain a battery in the speaker portion (for example, , See Patent Document 1).

  In addition, the battery housing portion and the battery lid for opening and closing the battery housing portion are provided on one side surface of the left and right cases, and the engaging portions that are engaged with each other by pushing the battery lid in a direction intersecting the case side surface. A battery storage mechanism for noise canceling headphones is disclosed (see, for example, Patent Document 2).

JP 2009-17175 A JP 2011-124886 A

  An object of the present invention is to provide a battery built-in headphone capable of providing a large volume air chamber that is not limited by the size of the battery even in a thin housing.

  The headphone with a built-in battery according to the present invention includes a cover having a sound emitting portion, an internal housing that forms an air chamber between the covers, a recess provided in the internal housing, and a side opposite to the cover of the internal housing. And a storage part for storing the storage object, and when the storage object is stored in the storage part, the storage object and the recess are arranged to face each other.

  According to the present invention, even in a thin casing, it is possible to provide a large volume air chamber that is not limited by the size of the battery.

It is the disassembled perspective view which shows embodiment of the battery built-in headphones concerning this invention, (a) The disassembled perspective view seen from the case side, (b) The disassembled perspective view seen from the cover side. FIG. 6 is an end view of a right housing included in the battery built-in headphones. It is an end view of the left housing | casing with which the said battery built-in headphones are equipped. FIG. 5A is a plan view of an internal housing showing another embodiment of the battery built-in headphones according to the present invention, and FIG. 5B is an end view of the right housing. FIG. 6A is a plan view of an internal housing showing still another embodiment of the battery built-in headphones according to the present invention, and FIG. 5B is an end view of the right housing. It is the disassembled perspective view which shows embodiment of the conventional battery built-in headphones, Comprising: (a) The exploded perspective view seen from the case side, (b) The exploded perspective view seen from the cover side. It is an end view of the housing | casing with which the said battery built-in headphones are equipped.

  Hereinafter, embodiments of a battery-equipped headphone (hereinafter referred to as “the present headphone”) according to the present invention will be described with reference to the drawings.

● This headphone (1) ●
As shown in FIGS. 1 to 3, the headphone 1 includes a cover 12, an internal housing 13, a case 14, a driver unit 17, and a battery housing portion 19 as a right housing 11.

  As shown in FIGS. 1A and 1B, the cover 12 (referred to as a baffle) is a disk-shaped member having a sound emitting portion 15 and an ear pad 10. The cover 12 is attached to the internal housing 13. A driver unit 17 is provided between the cover 12 and the internal housing 13. The driver unit 17 converts an electrical signal input to the headphone 1 into an audio signal. The sound emitting unit 15 is a plurality of holes for emitting the sound signal. The electric signal input means from the regenerator or the like to the headphones 1 may be wired or wireless.

  A space between the internal housing 13 and the driver unit 17 is an air chamber 18. The air chamber 18 acts as an acoustic stiffness and affects characteristics (frequency response) such as the resonance frequency of the diaphragm of the driver unit 17. The inner housing 13 includes a protruding portion 13 a whose central portion protrudes in a substantially circular shape toward the case 14. The inside of the protrusion 13 a is also a part of the air chamber 18.

  The protrusion 13a includes a recess 13b and a recess 13c that are cut along a plane parallel to the central axis. The recess 13b and the recess 13c are in opposite positions.

  The internal housing 13 includes a through hole 16a and a through hole 16b in the recess 13b and the recess 13c, respectively. The through hole 16a and the through hole 16b are provided from the side surface of the protruding portion 13a to the root portion of the protruding portion 13a. The through hole 16 a and the through hole 16 b communicate the outside of the case 14 and the air chamber 18.

  There may be one or more through holes. The through hole may be provided in addition to the recess. An acoustic resistance material may be affixed to the through hole 16a and the through hole 16b. The acoustic resistance of the driver unit 17 can be adjusted by adjusting the number of through holes and the presence or absence of the acoustic resistance material. The acoustic resistance material is, for example, a sponge or felt.

  The case 14 is attached so as to cover the surface of the inner housing 13 opposite to the cover 12 side. Case 14 may have a button for a user's operation.

  The case 14 has a circular case hole 14a and a rib 14b formed on the circumference of the case hole 14a at a substantially central portion. The inner periphery of the case hole 14 a is larger than the outer periphery of the protruding portion 13 a of the internal housing 13. The protrusion 13a is inserted into the case hole 14a in the assembled state. The case hole 14a communicates with the through hole 16a and the through hole 16b.

  The rib 14b is a wall provided in a circular shape at the end of the case hole 14a. The rib 14 b constitutes a part of the side wall of the air chamber 18.

  As shown in FIG. 2, the through hole 16a communicates with the outside of the right housing 11 through a space between the outer peripheral surface of the protruding portion 13a and the inner peripheral surface of the rib 14b, that is, the communication path 160a.

  The rib 14b has a notch portion 14c in which a part of the wall is notched. The end portion of the case hole 14a is surrounded by the rib 14b, but is open at the notch portion 14c. The notch 14c has a shape in which the rib 14b is cut along a plane parallel to the central axis when viewed from the inner housing 13 side.

  The battery housing part 19 is a space for housing and fixing the battery 190. The battery housing part 19 is provided in a ring-shaped space between the internal housing 13 and the case 14. In the battery housing portion 19, for example, a resin claw is provided on the inner housing 13, and the claw fixes the battery 190. The battery 190 and a circuit board 290 to be described later are examples of stored items.

  The battery housing part 19 includes a terminal that is electrically connected to the battery 190 when the battery 190 is housed. The battery 190 fixed to the battery housing part 19 is electrically connected to a circuit board 290 described later through a terminal.

  The battery 190 is a flat rectangular parallelepiped member accommodated in the battery accommodating part 19, for example. A flat surface of the battery 190 is attached to the inner housing 13. The battery 190 has an outer wall 19a, which is one of its side surfaces, in contact with the notch 14c, and surrounds the case hole 14a instead of the rib 14b at the notch 14c.

  The flat surface of the battery 190 may be attached to the case 14.

  The outer wall 19 a of the battery 190 constitutes a part of the side wall of the air chamber 18. When the battery 190 is accommodated in the battery accommodating portion 19, the outer wall 19a of the battery 190 faces the recess 13b with a gap. The through hole 16a communicates with the outside of the right housing 11 through a space between the outer wall 19a of the battery 190 and the case hole 14a. In other words, the communication path 160a that connects the air chamber 18 and the outside of the case 14 is defined by the gap between the recess 13b and the outer wall 19a of the battery 190 and the through hole 16a.

  A gap between the outer wall 19a and the recess 13b functions as an acoustic resistance. By setting the gap interval to an appropriate interval, the acoustic resistance value of the communication path 160a is determined. With this configuration, the number of parts can be reduced.

  Since the battery 190 constitutes a part of the side wall of the air chamber 18, it is possible to arrange a larger battery 190 than when the inner casing 13 or the case 14 constitutes all the side walls of the air chamber 18. In addition, the degree of freedom in design is improved, for example, the air chamber 18 is enlarged without changing the size of the housing.

  Since the air chamber 18 and the battery 190 are arranged so as to be shifted from each other, the protruding portion 13 a can be provided in the internal housing 13. With this configuration, the volume of the air chamber 18 can be secured without increasing the thickness of the right housing 11. That is, the degree of freedom of the thickness of the right housing 11 in the design can be increased.

  Moreover, this headphone 1 can arrange | position the air chamber 18 and the communicating paths 160a and 160b in the symmetrical position about the sound emission axis. Therefore, the driver unit operates without being biased, and a headphone with good sound quality can be realized.

  The sizes of the air chamber 18 and the battery 190 may be designed based on the function of the diaphragm and the specifications of the headphones, respectively. For example, since the size of the air chamber 18 can be designed freely, headphones with good sound quality can be realized. Further, by increasing the size of the battery 190, a battery having a larger capacity can be arranged, and noise canceling headphones and wireless headphones that can withstand long-time use can be realized. That is, this configuration contributes to providing headphones with a high degree of freedom with respect to the design of the internal housing 13 and the case 14, the specifications of the circuit, and the like.

  In the conventional example, the battery may have to be disposed on the sound output shaft of the driver unit. However, according to the above embodiment of the present invention, the battery 190 constitutes a part of the side wall of the air chamber 18, so that the center of the air chamber 18 can be disposed on the sound emission shaft of the driver unit 17. With this configuration, the headphone 1 can have higher sound quality.

  Since the through hole 16 a and the through hole 16 b communicate with the outside of the right housing 11, the through hole 16 a and the through hole 16 b can be arranged symmetrically with respect to the sound emission axis of the driver unit 17. With this configuration, the headphone 1 can have higher sound quality.

  Next, an example of the left housing used in combination with the right housing 11 will be described.

  As shown in FIG. 3, the left housing 21 includes a cover 22, an internal housing 23, a case 24, a driver unit 27, and a substrate housing portion 29. The cover 22 is a disk-shaped member having a sound emitting part 25 and an ear pad 20. The cover 22 is attached to the internal housing 23. A driver unit 27 is provided between the cover 22 and the internal housing 23. The driver unit 27 converts an electrical signal input to the headphone 1 into an audio signal. The sound signal is emitted from the sound emitting unit 25 which is a plurality of holes.

  A space between the internal housing 23 and the driver unit 27 is an air chamber 28. The air chamber 28 acts as an acoustic stiffness and affects characteristics (frequency response) such as the resonance frequency of the diaphragm of the driver unit 17. The inner housing 23 includes a protruding portion 23 a whose central portion protrudes in a substantially circular shape toward the case 24. The inside of the protrusion 23a also constitutes a part of the air chamber 28.

  The protrusion 23a includes a recess 23b and a recess 23c that are cut along a plane parallel to the central axis. The recess 23b and the recess 23c are in opposite positions.

  The inner housing 23 includes a through hole 26a and a through hole 26b in the recess 23b and the recess 23c, respectively. The through hole 26a and the through hole 26b are provided from the side surface of the projecting portion 23a across the root portion of the projecting portion 23a. The through hole 26 a and the through hole 26 b communicate the outside of the left housing 21 and the air chamber 28.

  The substrate housing portion 29 is provided in a ring-shaped space between the internal housing 23 and the case 24. The board housing part 29 houses the circuit board 290. The circuit board 290 is a board on which an electronic circuit having a wireless communication function, a noise canceling function, or the like using, for example, BlueTooth (registered trademark) is mounted. The circuit board 290 is fixed by a spacer 29 a so that the mounting surface faces the case 24. The spacer 29a is made of an appropriate material such as a plastic, a rubber material, or a sponge.

  The mounting surface of the circuit board 290 may be fixed so as to face the internal housing 23. Further, both the inner housing 23 side and the case 24 side may be mounting surfaces.

  The side surface of the circuit board 290 and the spacer 29 a constitute a part of the side wall of the air chamber 28. When the circuit board 290 is housed in the board housing portion 29, the side surface of the circuit board 290 and the spacer 29a face the recess 23b with a gap. The through hole 26a communicates with the outside of the left housing 21 through the side surface of the circuit board 290 and the space between the spacer 29a and the case hole 24a. In other words, a communication path 260 a that connects the air chamber 28 and the outside of the case 24 is formed by the gap between the recess 23 b and the side surface of the circuit board 290 and the spacer 29 a and the through hole 26 a.

  The shapes of the case 24, the rib 24b, and the cutout portion 24c are the same as the shapes of the case 14, the rib 14b, and the cutout portion 14c of the right housing 11. The side surface of the circuit board 290 and the spacer 29a are in contact with the notch 24c and constitute a part of the side wall of the air chamber 28. The gap formed by the side surfaces of the circuit board 290 and the spacer 29a and the recess 23b functions as an acoustic resistance in the communication path 260b.

  The end portion of the circuit board 290 and the spacer 29 a together with the through hole 26 a form a communication path 260 a that communicates the air chamber 28 with the outside of the case 24.

  Further, the electronic component mounted on the circuit board 290 may form the communication path 260a together with the through hole 26a.

  In the present embodiment, the spacer 29a and the rib 24b are separate members, but the circuit board 290 may be brought into contact with a part of the rib 24b, and the rib 24b may serve as a spacer. With this configuration, it is not necessary to arrange a spacer separately, so that the number of parts can be reduced.

  In the present embodiment, the right case 11 has a battery 190 and the left case 21 has a circuit board 290, but the right case 11 has a circuit board 290 and the left case 21 has a battery 190. Also good.

  According to the embodiment described above, the circuit board 290 constitutes a part of the side wall of the air chamber 28, so that the circuit board 290 larger than the case where the inner housing 23 or the case 24 constitutes the side wall is arranged. can do. Moreover, the air chamber 28 can be enlarged.

  The sizes of the air chamber 28 and the circuit board 290 may be designed based on the function of the diaphragm and the specifications of the headphones, respectively. For example, by increasing the circuit board 290, it is possible to increase the arrangement interval between electronic components mounted on the circuit board 290, or to increase the area of the ground pattern. Therefore, the electronic circuit built in the headphones can easily realize a design that is resistant to noise. With this configuration, the degree of freedom in designing the internal housing 23, the case 24, and the circuit board 290 can be increased.

  The right housing 11 and the left housing 21 are different in that a part of the side wall of the air chamber is configured by the battery 190 or the circuit board 290, and the other configurations are the same. With this configuration, the left and right acoustic resistances can be balanced. In addition, each portion of the battery 190 and the circuit board 290 that comes into contact with the notch 14c and the notch 24c may be provided with a side wall auxiliary member such as a rubber material. The battery 190 and part of the circuit board 290 and the side wall auxiliary member seal the notch portion 14c and the notch portion 24c, so that the degree of freedom in designing the air chamber 18 and the air chamber 28 is further improved. In this case, a sealed battery-equipped headphone can be realized.

● This headphone (2) ●
Next, another embodiment of the present headphone shown in FIG. 4 will be described focusing on the differences from the above-described embodiment. This embodiment is different from the above-described embodiment in that there are four through holes.

  4A and 4B show only the right housing 41 of the headphone 4. The right housing 41 includes a cover 42, an internal housing 43, a case 44, a driver unit 47, and a battery housing portion 49. In FIG. 4A, the case 44 is not shown.

  The cover 42 has a sound emitting part 45 and an ear pad 40. The cover 42 is attached to the inner housing 43. There is a driver unit 47 between the cover 42 and the internal housing 43. A space between the inner housing 43 and the driver unit 47 is an air chamber 48.

  The internal housing 43 includes a protrusion 43a. The protrusion 43a includes a recess 43b and a recess 43c that are cut along a plane parallel to the central axis. The recess 43b and the recess 43c are in opposite positions.

  The internal housing 43 includes through holes 46 a to 46 d that allow the outside of the right housing 41 to communicate with the air chamber 48. The through holes 46a to 46d are provided across from the side surface of the protrusion 43a to the root of the protrusion 43a. The through hole 46a is provided so as to overlap the recess 43b. The through hole 46c is provided so as to overlap the recess 43c.

  A gap formed by the outer wall 49a and the recess 43b of the battery 490 functions as an acoustic resistance of the communication path 460a.

  The shape of the battery 490 and the housing posture in the battery housing part 49 are the same as in the above-described embodiment.

  The recess 43c is provided such that the acoustic resistance of the through hole 46c is the same as the acoustic resistance of the through hole 46a. The through hole 46c of the recess 43c may be closed with an appropriate member in order to adjust the acoustic resistance.

  FIGS. 5A and 5B show the right housing 61 of the headphone 6 when the air chamber is enlarged. The right housing 61 includes a cover 62, an internal housing 63, a case 64, a driver unit 67, and a battery housing 69. In FIG. 5A, the case 64 is not shown.

  The cover 62 has a sound emitting part 65 and an ear pad 60. The cover 62 is attached to the inner housing 63. There is a driver unit 67 between the cover 62 and the internal housing 63. A space between the inner housing 63 and the driver unit 67 is an air chamber 68.

  The shape of the battery 690 is the same as that of the battery 490.

  The inner housing 63 includes through holes 66 a to 66 d that communicate the outside of the right housing 61 and the air chamber 68. The through holes 66a to 66d are provided across from the side surface of the protruding portion 63a to the root portion of the protruding portion 63a. The through hole 66a is provided so as to overlap the recess 63b. The through hole 66c is provided so as to overlap the recess 63c.

  In this embodiment, by appropriately designing the sizes of the through holes 66a to 66d, a part of the outer wall 69b that is in contact with the inner housing 63 of the battery 690 and orthogonal to the outer wall 69a is in contact with the through hole 66a. . Accordingly, the gap formed by the outer wall 69a, the outer wall 69b, and the recess 63b of the battery 690 functions as an acoustic resistance. Such a configuration realizes a design in which the size of the air chamber 68 does not depend on the size of the accommodation, and provides a headphone with a balanced acoustic stiffness.

  According to the embodiment described above, the battery 690 constitutes a part of the side wall of the air chamber 68, so that the battery accommodating portion 69 is made larger than the case where the case 64 constitutes the internal housing 63 or the side wall. be able to. Moreover, the air chamber 68 can be enlarged. That is, the degree of freedom in designing the battery housing portion 69 and the air chamber 68 is improved.

  Since the gap formed by the outer wall 69a, the outer wall 69b, and the recess 63b of the battery 690 functions as acoustic resistance, the through hole can be arranged symmetrically with respect to the sound output axis even when the through hole is large.

1 headphone 11 right case 12 cover 13 internal case 13a recess 14 case 15 sound emitting part 16a through hole 16b through hole 18 air chamber 19 battery housing part 19a outer wall 160b communication path 190 battery

Claims (10)

A cover with a sound emitting part;
An internal housing constituting an air chamber between the cover and the cover;
A recess provided in the inner housing;
An accommodating portion for accommodating an object on the side opposite to the cover of the inner housing;
With
When the accommodation is accommodated in the accommodation portion, the accommodation and the concave portion are arranged to face each other.
The battery built-in headphones characterized by this. A case attached to the inner casing opposite to the cover;
A case hole provided in the case;
Further comprising
The inner housing includes a protruding portion that protrudes toward the case and is inserted into the case hole,
The headphone with a built-in battery according to claim 1, wherein an inside of the protruding portion communicates with the air chamber.   The headphone with a built-in battery according to claim 1, wherein the container is in contact with the recess. The recess includes a through hole communicating with the air chamber;
The container and the recess are arranged with a gap between them,
The headphone with a built-in battery according to claim 1, wherein the gap and the through hole form a communication path that connects the air chamber and the outside of the cover.   The headphone with a built-in battery according to claim 4, wherein a size of the communication path is defined by the recess, the accommodation, and the through hole.   The battery built-in headphones according to claim 4 or 5, wherein a plurality of the through holes are provided.   The headphone with a built-in battery according to claim 1, wherein the container is a battery.   The battery built-in headphone according to claim 1, wherein the container is a circuit board.   The headphone with a built-in battery according to claim 8, wherein the circuit board includes a spacer, and the spacer and the recess are disposed to face each other when the circuit board is accommodated in the accommodating portion. A rib provided on the periphery of the case hole and constituting a part of the side wall of the air chamber;
Further comprising
The rib has a notch,
The headphone with a built-in battery according to any one of claims 2 to 9, wherein the container is in contact with the notch.

Images