JP2011234102A - Portable speaker device and electronic appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable speaker device for stably supplying acoustic property or design fit to a user's taste by simply replacing a lid part thereof.SOLUTION: A first lid part 100 and a second lid part 200 are provided on the back surface side of a case body 500 for storing a speaker unit 400 so that one of the lid parts is connected via the other lid part. The first lid part 100 includes an engagement part 110 and an outer peripheral cylinder part 130, whereas the second lid part 200 includes an engaged part 210 and a wall part 240. The engagement part 110 is provided in a plate shape extending inward from the outer peripheral cylinder part 130, and the engaged part 210 is provided in a plate shape extending outward from the wall part 240. The engagement part 110 is provided between the engaged part 210 and a bottom surface part 220, whereas the engaged part 210 is provided between the engagement part 110 and a bottom surface part 120. The engagement part 110 and the engaged part 210 are engaged detachably, and the first lid part 100 is removable from the second lid part 200.

Description

  The present invention relates to a portable speaker device such as an earphone or a headphone, and an electronic apparatus including the portable speaker device.

  In recent years, along with downsizing and personalization of electronic devices such as audio devices such as portable audio players, portable speaker devices such as earphones having a speaker unit therein have become widespread.

  For example, Patent Document 1 discloses an earphone that enables adjustment of sound quality accompanying a change in housing volume and a change in appearance design by making a part of the housing detachable and replaceable.

  Also, for example, in Patent Document 2, a decorative cap member provided on the back surface of the unit case main body rotates around the outer periphery of the cord lead member supporting portion constituting the unit case main body in which the electroacoustic transducer is built. An electroacoustic transducer is disclosed.

JP 2008-283398 A Japanese Patent Laid-Open No. 07-154888

  For example, the portable speaker device disclosed in Patent Document 2 includes an attachment mechanism for a cap member and a cord lead member support portion. The engaging convex portion of the cap member is engaged with an engaging concave portion provided in the cord lead-out member supporting portion. When the removal of the cap member from the cord lead-out member support portion is repeated, the engagement convex portion is damaged or worn. The cap member may be easily detached from the cord lead-out member support portion due to breakage or wear of the engaging convex portion.

  This invention is made | formed in view of the situation mentioned above, Comprising: It solves the above problems as an example of a subject. That is, an object of the present invention is to provide a portable speaker device that can maintain the fixing force of the replaceable lid portion to the attached portion for a long period of time and can be smoothly attached by a simple operation.

  In order to solve the above-described problem, a portable speaker device according to the first aspect of the present invention includes a speaker unit, a housing portion that houses the speaker unit, and a lid portion that is attached to the housing portion. The lid portion and the casing portion constitute an air chamber provided on the opposite side to the sound radiation side of the speaker unit, and the lid portion includes a first lid portion and a second lid portion. A fitting portion provided in the first lid portion and a fitted portion provided in the second lid portion are provided between the first lid portion and the second lid portion, The first lid portion includes an opening portion, the fitting portion is disposed inside the opening portion, the second lid portion includes a bottom surface portion that supports the fitted portion, A gap is provided between the bottom surface portion and the fitted portion, and the opening of the first lid portion is a planar shape corresponding to the outer shape of the fitted portion. The fitted portion has a planar shape corresponding to the opening of the first lid portion and the outer shape of the fitting portion, and the fitting portion is disposed in the gap of the second lid portion. The fitted portion is disposed in the opening of the first lid portion, and the fitting portion and the fitted portion are detachably fitted to each other.

  In order to solve the above problem, an electronic apparatus according to a twenty-first aspect of the present invention includes the portable speaker device according to the first aspect.

1 is a perspective view schematically showing an external configuration of an earphone that is an embodiment of a portable speaker device according to the present invention. 1 is a perspective view schematically showing an internal configuration of an earphone which is an embodiment of a portable speaker device according to the present invention. It is a disassembled perspective view which shows typically the structure of each part of the state which decomposed | disassembled the earphone which is one Embodiment of the portable speaker apparatus based on this invention. It is a perspective view which shows typically the structure of the 1st cover part of the earphone which is one Embodiment of the portable speaker apparatus which concerns on this invention. (A) is a perspective view which shows typically the structure of the 2nd cover part of the earphone which is one Embodiment of the portable speaker apparatus based on this invention, (b) is the 2nd cover of the said earphone. It is a front view which shows typically the structure of a part, (c) is a bottom view which shows typically the structure of the 2nd cover part of the said earphone. It is a perspective view which shows typically the internal structure of each part of the state which attached the 1st cover part with respect to the 2nd cover part of the earphone which is one Embodiment of the portable speaker apparatus which concerns on this invention. It is a perspective view which shows typically the external appearance structure of each part in operation | movement which attaches a 1st cover part with respect to the 2nd cover part of the earphone which is one Embodiment of the portable speaker apparatus which concerns on this invention. It is a perspective view which shows typically the internal structure of each part in operation | movement which attaches a 1st cover part with respect to the 2nd cover part of the earphone which is one Embodiment of the portable speaker apparatus which concerns on this invention. 1 is a front view schematically showing an external configuration of a portable audio player including an earphone that is an embodiment of a portable speaker device according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
A configuration of an earphone 10 that is an embodiment of a portable speaker device according to the present invention will be described with reference to FIGS. 1, 2, and 3. FIG. 1 is a perspective view schematically showing an external configuration of an earphone 10 which is an embodiment of a portable speaker device according to the present invention. FIG. 2 is a perspective view schematically showing an internal configuration of the earphone 10 which is an embodiment of the portable speaker device according to the present invention. FIG. 3 is an exploded perspective view schematically showing the configuration of each part in a state in which the earphone 10 which is an embodiment of the portable speaker device according to the present invention is disassembled.

  As shown in FIGS. 1, 2, and 3, the earphone 10 according to the present embodiment includes a speaker unit 400, a casing unit 500, an auricle insertion unit 600, and a lid unit 20. And the cover part 20 of the earphone 10 of this Embodiment consists of the 1st cover part 100, the 2nd cover part 200, and the 3rd cover part 300. FIG.

  The speaker unit 400 includes an electroacoustic transducer having a known component for converting an audio signal transmitted from an audio device or the like serving as an audio signal generation source into a sound wave. The electroacoustic transducer is not particularly limited, such as an electrodynamic (dynamic) electroacoustic transducer and a piezoelectric electroacoustic transducer. In the present embodiment, speaker unit 400 is an electrodynamic electroacoustic transducer, and includes a frame, a vibrating body supported by the frame, and a magnetic circuit. The vibrating body includes a diaphragm, an edge, a voice coil, and a voice coil support portion. The magnetic circuit includes a yoke, a magnet, and a plate. A frame included in the speaker unit 400 is supported by the casing unit 500. Each space on the front side (acoustic radiation side) and back side (opposite side to the acoustic radiation side) of the speaker unit 400 is partitioned by a diaphragm. Further, the diaphragm may be formed of a material having low air permeability or substantially no air permeability, and substantially prevent air from moving through each space. Further, the space on the back side of the speaker unit 400 may be substantially airtight between the speaker unit 400, the casing unit 500, and the lid unit 20. When the space on the back side of the speaker unit 400 is airtight, the casing 500 and the frame are in contact with each other in the circumferential direction, thereby preventing air from passing between the frame and the casing 500. It doesn't matter.

  The casing unit 500 accommodates the speaker unit 400. In addition, the housing unit 500 includes an acoustic tube 510 that guides sound waves radiated from the speaker unit 400 to the external auditory canal via the auricle insertion unit 600. The central axis of the lid 20 forms a predetermined angle with respect to the central axis of the acoustic tube 510. In addition, the acoustic tube 510 is not limited to being formed continuously with respect to the casing unit 500, and may be formed as a separate member so as to be removable from the casing unit 500.

  Moreover, the housing | casing part 500 and the acoustic tube 510 may be integrally molded. Moreover, you may engage and connect the housing | casing part 500 and the acoustic tube 510 so that the angle of the acoustic tube 510 with respect to the cover part 20 can be changed. In this case, the user can maintain the proper wearing state with respect to the user's ear by adjusting the angle of the acoustic tube 510 according to preference. As the material of the casing unit 500, a resin material (for example, PS or ABS), a metal (for example, aluminum, iron, or the like), or a composite material thereof can be used.

  The auricle insertion unit 600 guides sound waves from the speaker unit 400 that passes through the acoustic tube 510 to the ear canal. The auricle insert 600 includes a cylindrical portion 610 supported by a part of the acoustic tube 510 and an external auditory canal contact portion 620 that contacts the auricle. The tubular portion 610 may be detachable from the acoustic tube 510. By configuring the external auditory canal contact portion 620 with an elastic body, it is possible to give the user a suitable wearing feeling and maintain an appropriate wearing state. Further, the earphone 10 may include a plurality of auricle insertion portions 600 having different external ear canal contact portions 620, and may be configured so as to be appropriately exchangeable according to the user's preference.

  Further, an acoustic filter (not shown) that can adjust the sound quality may be disposed between the auricle insertion portion 600 and the acoustic tube 510. The arrangement position of the acoustic filter may be, for example, an end portion of the acoustic tube 510 on the auricle insertion portion 600 side, an end portion of the acoustic tube 510 on the lid portion 200 side, or an intermediate portion between these ends. The ear canal contact portion 620 may be made of a resin material such as silicone rubber, for example.

  The lid portion 20 is attached to the opposite side of the acoustic tube 510 side of the housing portion 500. The lid portion 20 forms an air chamber 700 on the back side of the speaker unit 400 disposed in the housing portion 500 (the side opposite to the acoustic radiation side). The air chamber 700 is substantially composed of a housing part 500, a speaker unit 400, and a lid part 20.

  The lid part 20 includes a first lid part 100, a second lid part 200, and a third lid part 300. In the present embodiment, the first lid portion 100 as one lid portion is attached to the housing portion 500 via the second lid portion 200 as the other lid portion. One lid and the other lid each have an opening which will be described later. The air chamber 700 is opened by this opening. The lid 20 is made of a known resin material. The lid 20 may be made of the same material as that of the casing 500.

  The first lid portion 100 includes a fitting portion 110 on the housing portion 500 side. The second lid part 200 includes a fitted part 210 corresponding to the fitting part 110. The fitting part 110 and the fitted part 210 are detachably fitted. In addition, after this, the fitting part 110 and the to-be-fitted part 210 are fitted, the operation | movement which attaches the 1st cover part 100 with respect to the 2nd cover part 200, or the 1st cover part 100 is 2nd. The operation of removing the lid from the lid portion 200 is generically referred to simply as a fitting operation. In the present embodiment, the fitting portion 110 and the fitted portion 210 are detachably fitted, and the earphone 10 includes an attachment mechanism for the first lid portion 100 and the second lid portion 200. .

  A third lid 300 is attached to the first lid 100 on the side opposite to the casing 500 side. The third lid 300 hermetically seals the air chamber 700 that includes the speaker unit 400, the lid 20, and the casing 500. In addition, a sound absorbing material (not shown) is provided in the vicinity of the third lid 300 on the speaker unit 400 side to suppress sound leakage from the third lid 300 to the outside. The outer surface of the third lid 300 can be variously designed by applying various shapes, patterns, and colors. In addition, since the earphone 10 includes a plurality of types of the third lid portions 300, the user can appropriately replace them according to his / her preference. Note that the earphone 10 may include a plurality of third lid portions 300 having different shapes. Moreover, the earphone 10 may include a plurality of third lid portions 300 having substantially the same shape or different design properties.

  Next, with regard to the earphone 10, the configuration of the first lid 100 and the configuration of the second lid 200, and the configuration of each part when both are attached will be described with reference to FIGS. This will be described in detail. FIG. 4 is a perspective view schematically showing the configuration of the first lid portion 100 of the earphone 10 which is an embodiment of the portable speaker device according to the present invention. FIG. FIG. 4B is a perspective view seen from the lid 300 side (the side opposite to the casing 500 side), and FIG. 4B is a perspective view seen from the casing 500 side. FIG. 5 is a perspective view schematically showing the configuration of the second lid portion 200 of the earphone 10 which is an embodiment of the portable speaker device according to the present invention, and FIG. FIG. 5B is a front view seen from the first lid 100 side (opposite side to the casing 500 side), and FIG. 5B is a perspective view seen from the lid 100 side (opposite side to the casing 500 side). FIG. 5C is a bottom view seen from the casing 500 side. FIG. 6 schematically shows the internal configuration of each part with the first lid 100 attached to the second lid 200 of the earphone 10 which is an embodiment of the portable speaker device according to the present invention. It is a perspective view shown.

  As shown in FIG. 4, the first lid portion 100 includes a bottom surface portion 120, a fitting portion 110 extending inward from the inner peripheral portion 120 </ b> A of the bottom surface portion 120, and an outer peripheral cylindrical portion surrounding the bottom surface portion 120. 130. The outer shape of the bottom surface portion 120 has a rectangular planar shape. The outer shape of the bottom surface portion 120 is substantially the same as or larger than that of the housing portion 500. The first lid portion 100 includes an opening 121 having a shape corresponding to the fitted portion 210 inside the bottom surface portion 120 (for example, the center). The opening 121 is formed in a substantially circular shape, and its outer diameter is substantially the same as or larger than the outer dimension in the radial direction of the fitted part 210.

  Moreover, the fitting part 110 is provided with a pair of fitting pieces 110L and 110R which oppose. The fitting pieces 110 </ b> L and 110 </ b> R are formed in a plate shape from the inner peripheral side surface of the bottom surface portion 120 toward the inside or the center of the bottom surface portion 120. The opening 121 includes a first opening 121A having a substantially circular planar shape and a second opening 121B (121L, 121R) having a rectangular planar shape. The second openings 121L and 121R are arranged to face each other with the first opening 121A interposed therebetween, and are arranged closer to the outer peripheral cylinder part 130 than the first opening 121A. The outer end portions or a part of the fitting pieces 110L and 110R are supported by the bottom surface portion 120 or the outer peripheral cylindrical portion 130, and are disposed in the second opening 121B. Moreover, the inner side edge part or one part of the fitting pieces 110L and 110R protrudes inward from the 2nd opening part 121B. As a result, the fitting pieces 110L and 110R have a predetermined length in the direction (radial direction) from the outer peripheral cylindrical portion 130 toward the opening 121, and are set to a length that provides a bending amount that allows the fitting operation. ing.

  Further, as shown in FIGS. 4B and 6, the fitting pieces 110 </ b> L and 110 </ b> R include an inclined portion 111 between the outer end portion and the inner end portion. The inclined portion 111 is gently inclined toward the fitted portion 210 side from the outer end portion to the inner end portion of the fitting pieces 110L and 110R. In the present embodiment, the inclined portion 111 is the inclined portion on the inner end side of the fitting pieces 110L and 110R. That is, the inner end portions of the fitting pieces 110 </ b> L and 110 </ b> R are disposed on the fitted portion 210 side with respect to the formation surface of the bottom surface portion 120.

  Since the fitting part 110 includes the inclined part 111, an urging force can be applied to the fitted part 210. In particular, when the first lid portion 100 is attached to the second lid portion 200, the fitting pieces 110L and 110R are pressed and bent toward the housing portion 500 by the fitting pieces 210L and 210R described later. Thus, the urging force is applied to the mated piece 210. Thereby, the fixing force of the 1st cover part 100 and the 2nd cover part 200 can be comparatively enlarged, and it can suppress that it removes unintentionally. Further, a flat portion 222 (to be described later) of the second lid portion 200 applies an external force to the inclined portion 111 in a direction toward the first lid portion 100, and the fitted piece 210 is applied to the inclined portion 111. On the other hand, the inclined portion 111 may be curved toward the housing portion 500 by applying an external force in a direction toward the housing portion 500. The curved inclined portion 111 can apply a relatively large urging force to the fitted portion 210. In the present embodiment, the strength at which the first lid 100 is fixed to the second lid 200 (ie, the fixing force), or the fitting portion 110 and the fitted portion 210 are fixed. The strength is hereinafter simply referred to as fitting strength.

  Moreover, the convex part 115 is provided in the to-be-fitted part 210 side of the inner side edge part which the fitting part 110 has. The convex portion 115 corresponds to a concave portion 215 provided in the mated pieces 210L and 210R described later. Further, as shown in FIG. 6, the convex portion 115 has an arrangement and dimensions corresponding to the concave portion 215. Thus, when the first lid 100 is attached to the second lid 200, even if the first lid 100 acts on the second lid 200 in the circumferential direction, the convex portion The engagement strength between 115 and the recess 215 can make the fitting strength relatively large. Further, the convex portion 115 may have a smooth surface shape such as a hemispherical surface, or may have a protruding shape such as a rectangular shape. Moreover, when the fitting part 110 and the to-be-fitted part 210 fit, by providing the inclined part 111, the convex part 115 fits into the concave part 215, and a relatively large fixing force can be obtained. .

  The outer peripheral cylindrical portion 130 surrounds the outer peripheral portion of the bottom surface portion 120 and is erected. Further, the outer peripheral cylindrical portion 130 has a thickness in the central axis direction larger than the thickness of the bottom surface portion 120. Further, a stepped portion 131 that engages with a stepped portion 232 of the second lid portion 200 described later is provided on the inner side surface of the outer peripheral cylindrical portion 130 on the housing unit 500 side. Thereby, when the first lid 100 is attached to the second lid 200, even if the first lid 100 exerts an external force on the second lid 200 in the radial direction, the stepped portion Due to the engagement between 131 and the stepped portion 232, the first lid 100 and the second lid 200 can be prevented from being displaced, and the fitting strength can be made relatively large.

  As shown in FIG. 5, the second lid part 200 includes a bottom part 220, an outer peripheral cylindrical part 230 that surrounds the outer peripheral part of the bottom part 220, and a cover that fits into the fitting part 110 of the first lid part 100. The fitting part 210, the wall part 240 which supports the to-be-fitted part 210 in the position away from the bottom face part 220, and the plate-shaped top surface part 250 which protrudes outside from the wall part 240 are provided. The bottom part 220 has a rectangular planar shape. Further, the outer shape of the bottom surface portion 220 is substantially the same as or larger than that of the housing portion 500, similarly to the first lid portion 100. As shown in FIG. 5A, a wall portion 240 is erected on the inner side (for example, the center) of the bottom surface portion 220 toward the fitting portion 110.

  The wall portion 240 includes a first wall portion 241 (241A, 241B) that is erected along the circumferential direction from the inside of the bottom surface portion 220, and a second wall portion that is continuously erected on the first wall portion 241. The wall portion 242 (242A, 242B), the third wall portion 243 (243L, 243R) that is continuously provided on the second wall portion 242 and the first wall portion 241 are provided continuously. And a fourth wall portion 244 (244A, 244B). The second wall portion 242 extends along the radial direction with the first wall portion 241 as a base end. The third wall portion 243 connects the first wall portion 241 and the second wall portion 242 and extends along the outer peripheral portion of the top surface portion 250. The fourth wall portion 244 is disposed on the side opposite to the third wall portion 243 side with respect to the arrangement position of the first wall portion 241. Moreover, the to-be-fitted part 210 is provided with the recessed part comprised by the 1st wall part 241, the 4th wall part 244, and a part of 3rd wall part 243 as a planar shape. That is, the planar shape of the fitted portion 210 includes a recess in the radial direction.

  The distance between the first wall portions 241A and 241B is substantially the same or smaller than the distance between the fitting piece 110L and the fitting piece 110R of the fitting portion 110. Further, during the fitting operation, the fitting pieces 110L and 110R are inserted and arranged between the first wall portions 241A and 241B. As will be described later (see FIG. 7), the fitting operation is, for example, a rotational operation in which the first lid 100 is screwed into the second lid 200. During this screwing rotation operation, the outer peripheral side surfaces of the fitting pieces 110 </ b> L and 110 </ b> R abut against the wall portion 240, and the rotation axis of the rotation operation is substantially the central axis of the fitted portion 210.

  The second wall portions 242A and 242B are arranged point-symmetrically with respect to the center position of the fitted portion 210. The distance between the second wall portions 242A and 242B is substantially the same as or smaller than the outer diameter of the first opening 121A of the first lid portion 100. The second wall portion 242 extends in a direction intersecting with the rotation direction of the fitting portion 110 when the fitting portion 110 is fitted to the fitted portion 210. The second wall portion 242 inhibits the rotation operation of the first lid portion 100 during the rotation operation for attaching the first lid portion 100 to the second lid portion 200. That is, the second wall portion 242 is a part of a rotation operation restricting portion in which the fitting pieces 110L and 110R rotate with respect to the central axis of the fitted portion 210. For this reason, the 1st cover part 100 is arrange | positioned in a predetermined position with respect to the 2nd cover part 200, and the attachment of the 1st cover part 100 and the 2nd cover part 200 is enabled.

  The distance between the third wall portions 243L and 243R is substantially the same as or smaller than the outer diameter of the first opening 121A included in the first lid portion 100. The fitting pieces 110L and 110R abut or move along the third wall portions 243L and 243R when the first lid portion 100 rotates. That is, the third wall portion 243 is a part of a rotation operation restricting portion in which the fitting pieces 110L and 110R rotate with respect to the central axis of the fitted portion 210.

  The fourth wall portion 244 extends in the radial direction outside the first wall portion 241. The distance between the fourth wall portions 244A and 244B is substantially the same as or smaller than the outer diameter of the first opening 121A of the first lid portion 100. The fourth wall portion 244 extends in a direction intersecting the rotation direction of the fitting portion 110 when the fitting portion 110 is separated from the fitted portion 210. And the 4th wall part 244 suppresses the rotation operation | movement of the 1st cover part 100 in the case of the rotation operation which removes the 1st cover part 100 with respect to the 2nd cover part 200. FIG. That is, the fourth wall portion 244 is a part of a rotation operation restricting portion in which the fitting pieces 110 </ b> L and 110 </ b> R rotate with respect to the central axis of the fitted portion 210. For this reason, the 1st cover part 100 is arrange | positioned in a predetermined position with respect to the 2nd cover part 200, and the removal of the 1st cover part 100 and the 2nd cover part 200 is enabled.

  A fitted part 210 corresponding to the fitting part 110 is provided on the upper side of the wall part 240 (on the first lid part 100 side). The fitted portion 210 includes a fitted piece 210L and a fitted piece 210R. The mated pieces 210 </ b> L and 210 </ b> R are formed in a plate shape continuously to the top surface portion 250. Further, the outer peripheral portions of the mated pieces 210 </ b> L and 210 </ b> R have shapes along the first wall portion 241, the second wall portion 242, and the third wall portion 243. In addition, a part of the outer peripheral portion of the fitted portion 210 has an outer diameter larger than the outer diameter of the third wall portion 243. That is, the outer peripheral portion of the fitting piece 210 disposed in the vicinity of the third wall portion 243 protrudes outward from the third wall portion 243. When the first fitting portion is screwed into the outer peripheral portion of the fitted portion 210 disposed in the vicinity of the third wall portion 243, the upper end portion (on the first lid portion 100 side) of the fitting portions 110L and 110R. The operation is restricted in the vertical direction (the direction along the central axis of the second lid portion 200). The outer peripheral portion of the fitted portion 210, particularly the fitted portion 210 disposed in the vicinity of the third wall portion 243, is a part of the rotational movement restricting portion.

  Moreover, the to-be-fitted pieces 210L and 210R are formed in a semicircular disk shape as shown in FIG. Further, during the fitting operation, the fitting piece 110L and the fitting piece 110R are inserted between the fitting piece 210L and the fitting piece 210R. Further, the fitted pieces 210 </ b> L and 210 </ b> R are disposed in the opening 121 of the first lid 100.

  In addition, inclined portions 210A are provided along the circumferential direction on the bottom surfaces (surfaces facing the housing portion 500) of the mated pieces 210L and 210R. By providing the inclined portion 210A, the thickness of the fitted portion 210 is reduced in the direction from the second wall portion 242 to the third wall portion 243. Further, the distance between the inclined portion 210 </ b> A and the bottom surface portion 220 increases in the direction from the second wall portion 242 to the third wall portion 243. Since the second lid portion 200 includes the inclined portion 210 </ b> A, the fitting portion 210 can apply a relatively large urging force to the fitting portion 110 during the fitting operation. In particular, as the first lid portion 100 is rotated with respect to the second lid portion 200, the fitting pieces 110L and 110R are gradually pressed toward the housing portion 500 side, so that the fitting pieces 210L and 210R are moved. The biasing force gradually increases. For this reason, the fitting part 110 and the to-be-fitted part 210 can be fitted with comparatively large fitting strength. In addition, after the fitting operation, the urging force of the fitting portion 110 on the fitted portion 210 can be maintained in a relatively large state.

  Further, as shown in FIG. 5C and FIG. 6, a concave portion that engages with the convex portion 115 of the fitting portion 110 is formed on the bottom surface (the surface facing the housing portion 500) of the mated pieces 210 </ b> L and 210 </ b> R. 215 is provided. By providing the concave portion 215, the convex portion 115 of the fitting portion 110 and the concave portion 215 of the fitted portion 210 are engaged, and can be fitted with a relatively large fitting strength. Moreover, it can suppress that the external force along the circumferential direction acts on the 1st cover part 100, and the fitting part 110 remove | deviates from the to-be-fitted part 210 unintentionally.

  On the other hand, the bottom surface portion 220 includes a flat portion 222 that surrounds the first wall portion 241, the second wall portion 242, and the third wall portion 243. As shown in FIG. 6, the flat portion 222 contacts a part of the fitting pieces 110 </ b> L and 110 </ b> R at the time of fitting. The flat part 222 supports a part of the fitting part 110 having the inclined part 111 at a predetermined height with respect to the second lid part 200. At this time, the inner end portion of the inclined portion 111 is disposed on the fitted portion 210 side with respect to the flat portion 222. For this reason, during the fitting operation, the inclined portion 111 can apply a relatively large urging force to the fitted portion 210. In addition, the fitting pieces 110L and 110R can be fixed in a state where the biasing force of the inclined portion 111 against the fitted portion 210 is relatively large, and the fitting strength can be improved.

  Moreover, the outer peripheral cylinder part 230 which the 2nd cover part 200 has is provided with the step part 232 as an engaging part from the flat part 222 to an outer peripheral part. On the other hand, the outer peripheral cylindrical portion 130 of the first lid portion 100 includes a step portion 131 as an engaged portion corresponding to the step portion 232 included in the second lid portion from the inclined portion 111 to the outer peripheral portion. The step portion 232 of the second lid portion 200 and the step portion 131 of the first lid portion 100 engage with each other, so that the first lid portion 100 has a radial direction or a central axis with respect to the second lid portion 200. It is possible to fix the first lid portion 100 and the second lid portion 200 by being positioned in the direction.

  In addition, inclined surface portions 223 are provided at the corners of the bottom surface portion 220. The inclined surface portion 223 is lowered in the direction from the bottom surface portion 220 toward the outer peripheral cylindrical portion 230. That is, in the vicinity of the corner portion of the bottom surface portion 220, the flat portion 222, the inclined surface portion 223, and the upper end portion 231 of the outer peripheral cylinder portion 230 are arranged in the order from the bottom surface portion 220 toward the outer peripheral cylinder portion 230. By providing the inclined surface portion 223, the first lid portion 100 can be efficiently rotated with respect to the second lid portion 200 during the fitting operation. In particular, when the inclined surface portion 223 is not provided near the corner portion of the second lid portion 200, the first lid portion 100 receives a reaction force along the circumferential direction from the second lid portion 200. By providing the inclined surface portion 223 near the corner portion of the bottom surface portion 220 of the second lid portion 200, the reaction force can be made relatively small.

  As the first lid 100 rotates, as will be described later (see FIG. 8), the stepped portion 131 rides along the inclined surface portion 223, and the fitting pieces 110L and 110R become the fitting pieces 210L and 210R. Can be efficiently fitted. Therefore, by providing the inclined surface portion 223 at the corner portion of the bottom surface portion 220, a smooth fitting operation can be realized.

  Here, as shown in FIG. 6, a plane including a surface where the bottom surface portion 220 of the second lid portion 200 and the first lid portion 100 are in contact with each other is defined as an X plane. In addition, a plane including a surface where the bottom surface side (the housing unit 500 side) of the fitted portion 210 of the second lid portion 200 and the fitting portion 110 are in contact with each other is defined as a Y plane. Further, the surface of the bottom surface portion 120 of the first lid portion 100 opposite to the housing portion 500 side (the same plane as the surface opposite to the housing portion 500 of the top surface portion 250 of the second lid portion 200). ) Is a Z plane. Further, inside the outer peripheral cylindrical portion 130 or the outer peripheral cylindrical portion 230, a gap between the X plane and the Y plane is a first gap 721, and a gap between the Y plane and the Z plane is a second gap 722.

  As shown in FIG. 6, the second lid part 200 includes a first gap 721 between the fitted part 210 and the bottom part 220 in the central axis direction. The first lid part 100 includes a second gap 722 inside the outer peripheral cylinder part 130. The fitting part 110 is arranged in the second gap 722, and the fitted part 210 is arranged in the second gap 722. In addition, the fitting part 110 is sandwiched and fixed by the bottom face part 220 and the fitted part 210 arranged at different positions in the radial direction. At this time, by providing the inclined portion 111 of the fitting portion 110, the inclined portion 210A of the fitted portion 210, and the flat portion 222 of the bottom surface portion 220, a relatively large fitting is achieved in the central axis direction. Combined strength can be obtained. Further, since the step portion 131 and the step portion 232 are engaged and fixed, a relatively large fitting strength can be obtained in the radial direction. Further, since the convex portion 115 and the concave portion 215 are engaged and fixed, a relatively large fitting strength can be obtained in the circumferential direction.

  FIG. 5 shows that the bottom surface portion 220 of the second lid portion 200 includes an opening 221. The opening 221 is disposed adjacent to the third wall portion 243 or the flat portion 222. The opening 221 is disposed at a position facing the fitting portion 110. The opening 221 has a curved planar shape, and is disposed on the lower side (the casing 500 side) of the fitted portion 210. In the illustrated example, the opening 221 is formed along the first wall 241, the second wall 242, and the third wall 243.

  An air chamber 700 is provided between the casing unit 500 and the lid unit 20. The air chamber 700 has the X plane shown in FIG. 6 as a boundary surface, the casing 500 side being the first air chamber 710, and the opposite side of the casing 500 (the first lid 100 side) being the first. It is divided into two air chambers 720. The first air chamber 710 is provided between the housing part 500 and the second lid part 200. The second air chamber 720 is provided between the second lid part 200 and the first lid part 100. The first air chamber 710 is in communication with the second air chamber 720 through the opening 221 provided in the second lid portion 200. The second air chamber includes an opening 221, an opening 121, a first gap 721, and a second gap 722. The air chamber 700 is hermetically sealed with the speaker unit 400 and the third lid portion 300 disposed on the housing unit 500 side.

  In general, it is known that the acoustic characteristics of the speaker unit 400 are affected by the volume of the space on the back side of the speaker unit 400 (corresponding to the size of the volume of the air chamber 700 in the present embodiment). In the present embodiment, the space on the back side of the speaker unit 400 can be made relatively large by providing the lid portion 20. In particular, the casing 500, the first lid 100, the second lid 200, and the third lid 300 constitute the air chamber 700, so that a relatively large volume can be provided on the rear side of the speaker unit 400. Can be provided. For this reason, the acoustic characteristics of the earphone 10 can be improved.

Further, for example, the earphone 10 may include a plurality of lids 20 in order to adjust the acoustic characteristics of the earphone 10 by changing the volume of the air chamber 700. The plurality of lid portions 20 have different shapes, so that the air chamber 700 provided between the plurality of lid portions 20 and the housing portion 500 can be changed to different volumes. In particular, the first lid 100 is detachably connected to the second lid 200. Therefore, the earphone 10 can be provided with the acoustic characteristics that the user likes by appropriately replacing the first lid 100 according to the user's preference. Moreover, in order to adjust the acoustic characteristics of the earphone 10, the earphone 10 may include a plurality of sound absorbing materials.

  Next, the operation of attaching the first lid portion 100 and the second lid portion 200 of the earphone 10 will be described in detail with reference to FIGS. 7 and 8. FIG. 7 schematically shows an external configuration of each part during operation of attaching the first lid 100 to the second lid 200 of the earphone 10 which is an embodiment of the portable speaker device according to the present invention. It is a perspective view shown. FIG. 8 schematically shows an internal configuration of each part during operation of attaching the first lid 100 to the second lid 200 of the earphone 10 which is an embodiment of the portable speaker device according to the present invention. It is a perspective view shown.

  When the first lid 100 is attached to the second lid 200, first, as shown in FIG. 7A, the fitting portion 110 and the fitted portion 210 are arranged at predetermined positions. Thereafter, the fitting part 110 is inserted into the fitted part 210. Specifically, first, the first lid 100 is brought into contact with the second lid 200 as shown in FIG. At this time, the fitted portion 210 is disposed in the opening 121 of the first lid portion 100. In addition, the fitting part 110 is disposed in a recessed part (a recessed part constituted by the first wall part 241, the fourth wall part 244, and a part of the third wall part 243) of the fitted part 210. The At this time, the step part 131 of the first lid part 100 is in contact with the upper end part 231 of the outer peripheral cylinder part 230 of the second lid part 200 as shown in FIG.

  As illustrated in FIG. 7B, the first lid 100 is rotated with respect to the second lid 200. Specifically, the first lid 100 is rotated 90 ° clockwise with the central axis of the second lid 200 as the rotation axis. At this time, as shown in FIG. 8B, the stepped portion 131 moves away from the upper end portion 231 that is a part of the outer peripheral cylindrical portion 230 and rides on the inclined surface portion 223 that is another part of the outer peripheral cylindrical portion 230. In addition, the first lid 100 is lifted from the second lid 200. When the first lid portion 100 is rotated, the inclined surface portion 223 is provided, so that the reaction force in the rotation direction is relatively small near the corner portion of the bottom surface portion 220, and the first lid portion is relatively small in rotational force. 100 can be rotated.

  When the step portion 131 rides on the inclined surface 223, the fitting pieces 110L and 110R of the fitting portion 110 are pressed against the bottom surfaces of the fitting pieces 210L and 210R of the fitting portion 210. Further, the fitting pieces 110L and 110R of the fitting portion 110 enter between the flat portion 222 and the top surface portion 250 of the bottom surface portion 220 (specifically, the first gap 721). Further, since the fitted portion 210 includes the inclined portion 210A, the fitting pieces 110L and 110R can apply a biasing force to the fitted pieces 210L and 210R. For this reason, the rocking | fluctuation in the central-axis direction of the 1st cover part 100 can be controlled, and smooth fitting operation | movement is enabled.

  As shown in FIG. 7C, when the first lid portion 100 is rotated 90 ° clockwise, the fitting portion 110 comes into contact with the second wall portion 242 and the rotation operation is restricted. At this time, the step portion 131 gets over the inclined surface portion 223 and engages with the step portion 232 of the outer peripheral cylindrical portion 230 at a predetermined position in the circumferential direction of the outer peripheral cylindrical portion 130. During this time, the first lid 100 that is lifted with respect to the second lid 200 operates to sink into the second lid 200. During the sinking operation, the second lid portion 200 includes the inclined surface portion 223, thereby enabling a smooth fitting operation. The fitting pieces 110L and 110R are sandwiched between the bottom surfaces of the fitting pieces 210L and 210R and the flat portion 222 in a state where a biasing force is applied to the fitting pieces 210L and 210R.

  In addition, the fitting pieces 110L and 110R in the fitting operation can have a relatively large urging force applied to the fitting pieces 210L and 210R by including the convex portions 115. Further, when the fitting operation is finished, when the convex portion 115 and the concave portion 215 are engaged, a contact sound in which the convex portion 115 and the concave portion 215 come into contact, or a collision sound in which the step portion 131 and the upper end portion 231 collide with each other. And vibration occurs. The user can recognize that the fitting operation has been completed by the contact sound, the collision sound, and the vibration. Therefore, it can suppress performing fitting operation more than necessary, and can suppress that load is applied to fitting pieces 110L and 110R.

  As described above, the operation of attaching the first lid 100 to the second lid 200 is performed by inserting the fitting portion 110 of the first lid 100 into the second lid 210 and rotating 90 ° clockwise. A relatively large fitting strength can be obtained by a simple operation of making it happen. Moreover, the operation | movement which removes the 1st cover part 100 from the 2nd cover part 200 is realizable by rotating in the direction opposite to the rotation direction at the time of attachment. Since this removal operation is substantially the same as the attachment operation, description thereof is omitted.

  As described above, in the present embodiment, the lid portion 20 includes the slope portion 111 of the fitting portion 110 in the first lid portion 100 and the slope portion 210A of the fitted portion 210 in the second lid portion 200. , And a flat part 222 of the bottom part 220. For this reason, the fitting part 110 can be fixed by being sandwiched between the fitted part 210 and the bottom face part 220 in the central axis direction. Further, during the fitting operation and after the fitting operation, the urging force by the fitting pieces 110L and 110R acts on the fitted portion 210, and the first lid portion 100 and the second lid portion 200 are not intended. Can be prevented from coming off. Further, since the second lid part 200 includes the inclined surface part 223, the first lid part 100 can be detached from the second lid part 200 with a relatively small rotational force. Therefore, simultaneously with the smooth fitting operation, the first lid portion 100 and the second lid portion 200 can be fixed with a relatively large fitting strength.

  In the present embodiment, the step 131 of the outer cylinder 120 in the first lid 100 and the step 232 of the outer cylinder 230 in the second lid 200 are engaged and fixed. Moreover, the convex part 115 of the fitting part 110 and the concave part 215 of the to-be-fitted part 210 are engaged and fixed. Since the first lid portion 100 and the second lid portion 200 include the step portions 131 and 232, the convex portion 115, and the concave portion 215, a relatively large fitting strength can be obtained in the radial direction and the circumferential direction. .

  In general, a large load is applied to the engaging portion and the engaged portion during the lid attaching operation. Further, when this attachment operation is repeated, the engaging portion or a part of the engaged portion may be worn or damaged. When such wear or damage occurs, the fixing force between the engaging portion and the engaged portion may be reduced. In the present embodiment, it is possible to suppress the occurrence of wear and damage by adopting the fitting mechanism as described above.

  As described above, in the present embodiment, it is possible to maintain the fixing force for a long time and to perform a smooth attachment operation with a simple operation. In addition, by selecting and exchanging an appropriate lid from a plurality of lids included in the earphone, it is possible to obtain acoustic characteristics suitable for the user's preference.

  Incidentally, the earphone 10 may be used in electronic devices such as a portable audio player, a portable video player, a television, a personal computer, a mobile phone, and a desktop audio player. FIG. 9 is a front view schematically showing an external configuration of a portable audio player 900 including the earphone 10 which is an embodiment of the portable speaker device according to the present invention. The portable audio player 900 includes a portable case 901 made of a resin material or a metal member, various operation switches 903 and a display 904 provided on the front surface 902 of the portable case 901. Further, the portable audio player 900 includes a connector on the bottom surface 905, and a signal generation device in the portable audio player 900 and a signal processing device in another electronic device can be electrically connected to each other.

  The earphone 10 is attached to the portable audio player 900 as an external product together with the remote controller unit 906, the plug unit 907, and the cord unit 908. The remote controller unit 906 is configured so that the portable audio player 900 can be remotely controlled via the code unit 908 by a small switch, a small monitor, or the like. The remote controller unit 906 is configured to be able to execute, for example, volume adjustment, output balance control for left and right ears, selection and change of screen display content, program content, or game content by external operations. Such control can also be performed by an operation switch 903 provided on the front surface 902. In addition, the earphone 10 is configured to convert an audio signal received via the code unit 908 into a sound wave and output the sound.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention. In addition, each of the above-described embodiments can divert each other's technology as long as there is no particular contradiction or problem in its purpose and configuration. In the present embodiment, the earphone 10 is described as a portable speaker device. However, the present invention is not limited to this, and a headphone or the like may be used.

  In the present embodiment, a plurality of first lids 100 having different volumes, or a plurality of first lids 100 having sound absorbing materials of different materials, etc. are prepared, and are appropriately exchanged according to user preference. it can. Thereby, the earphone 10 can provide the acoustic characteristic suitable for a user's liking.

  Further, in the present embodiment, the first lid portion 100 including the fitting portion 110 is disposed on the housing portion 500 side, and the second portion including the fitted portion 210 on the back side of the first lid portion 100. The lid portion 200 is disposed. Without being limited thereto, the first lid portion 100 including the fitted portion 210 is disposed as necessary, and the second lid including the fitting portion 110 on the back side of the first lid portion 100. The unit 100 may be arranged. In this case, the fitted portion 210 provided in the first lid portion 200 is provided on the second lid portion 200 side. Moreover, the fitting part 110 with which the 2nd cover part 200 is provided is provided in the 1st cover part 100 side. In the present embodiment, the outer shapes of the bottom surface portion 120 and the second lid portion 220 of the first lid portion are rectangular. However, the present invention is not limited to this, and a plurality of curved shapes such as an octagon, for example. It can also be made into a polygonal shape comprising a plurality of corners composed of a shape or a plurality of straight lines and two adjacent curved parts or two straight parts.

DESCRIPTION OF SYMBOLS 10 Earphone 20 Cover part 100 1st cover part 110 Fitting part 111 Inclined part 115 Convex part 120 Bottom face part 120A Inner peripheral part 121 Opening part 130 Outer peripheral cylinder part 131 Step part 200 2nd cover part 210 Part to be fitted 215 Recessed portion 220 Bottom surface portion 221 Opening portion 222 Flat portion 223 Inclined surface portion 230 Outer cylindrical portion 232 Step portion 240 Wall portion 241 First wall portion 242 Second wall portion 243 Third wall portion 244 Fourth wall portion 250 Top Surface portion 300 Third lid portion 400 Speaker unit 500 Housing portion 510 Acoustic tube 600 Auricle insertion portion 700 Air chamber 900 Portable audio player

Claims (21)

A speaker unit; a housing unit that houses the speaker unit; and a lid unit that is attached to the housing unit.
The lid portion and the housing portion constitute an air chamber provided on the opposite side to the acoustic radiation side of the speaker unit,
The lid portion includes a first lid portion and a second lid portion,
The fitting portion provided in the first lid portion and the fitted portion provided in the second lid portion are provided between the first lid portion and the second lid portion,
The first lid portion includes an opening, and the fitting portion is disposed inside the opening.
The second lid portion includes a bottom surface portion that supports the fitted portion, and a gap between the bottom surface portion and the fitted portion.
The opening of the first lid portion has a planar shape corresponding to the outer shape of the fitted portion,
The fitted portion includes a planar shape corresponding to the opening of the first lid portion and the outer shape of the fitting portion,
The fitting portion is disposed in a gap between the second lid portions, the fitted portion is disposed in an opening of the first lid portion, and the fitting portion and the fitted portion are mutually connected. A portable speaker device, which is detachably fitted. An air chamber is configured on the back side of the speaker unit by the casing, the first lid, and the second lid.
The first lid portion includes a bottom surface portion and an outer peripheral cylindrical portion surrounding the bottom surface portion, and the bottom surface portion has an inner peripheral portion constituting the opening,
The second lid portion includes a wall portion erected from the bottom surface portion of the second lid portion, and a plate-like top surface portion protruding outward from the wall portion,
The gap between the second lid portions is composed of the top surface portion, the bottom surface portion of the second lid portion, and the wall portion,
The fitting portion is supported by the outer peripheral cylindrical portion or the bottom surface portion of the first lid portion,
The gap between the second lid portions is a first gap, and the first lid portion is provided with a second gap,
The second gap is provided between the fitting portion and a surface disposed on the opposite side to the housing portion side of the bottom surface portion of the first lid portion,
The fitting portion is disposed in the first gap;
The portable speaker device according to claim 1, wherein the fitted portion is disposed in the second gap. The wall portion includes a first wall portion extending in the circumferential direction, and a second wall portion disposed outside the first wall portion and extending along the radial direction, The fitting portion is disposed so as to rotate in the first gap with the central axis of the fitted portion as a substantial rotation axis.
The portable speaker device according to claim 2, wherein the second wall portion extending in a direction intersecting with the rotation direction of the fitting portion restricts rotation of the fitting portion. The wall portion includes a third wall portion that connects the first wall portion and the second wall portion,
The third wall portion is erected on the bottom surface portion of the second lid portion along the outer peripheral portion of the top surface portion.
The portable speaker device according to claim 3, wherein the fitting portion is disposed in the first gap along the third wall portion.   One of the fitting portion and the fitted portion is provided with a convex portion on the side facing the other, and the other is provided with a concave portion that engages with the convex portion. Item 5. The portable speaker device according to Item 4. The fitting portion includes an inclined portion that is inclined along a direction from the fitting portion toward the fitted portion,
The portable speaker device according to claim 5, wherein the convex portion is provided on the inclined portion.   The portable speaker device according to claim 6, wherein the inclined portion is provided at an inner end portion of the fitting portion. The first lid portion and the second lid portion have a rectangular planar shape,
The bottom surface portion of the second lid portion includes an inclined surface portion provided in the vicinity of the corner portion, and a flat portion provided inside the inclined surface portion,
The inclined surface portion is inclined from the bottom surface portion toward the housing portion,
The portable speaker device according to claim 7, wherein the outer peripheral cylindrical portion of the first lid portion is disposed at a predetermined position with respect to the first lid portion through the inclined surface portion. . The air chamber is a first air composed of one of the first lid portion and the second lid portion that is disposed on the speaker unit side, the housing portion, and the speaker unit. A chamber, and a second air chamber composed of the one lid portion and the other lid portion,
The portable speaker device according to claim 8, wherein the one lid portion includes an opening that allows the first air chamber and the second air chamber to communicate with each other.   10. The portable speaker device according to claim 9, wherein a bottom surface portion of the one lid portion includes an opening for communicating the first air chamber and the second air chamber.   The portable speaker device according to claim 10, wherein the second air chamber is configured by the first gap and the second gap.   The portable speaker device according to claim 11, wherein the lid includes a third lid that covers an opening of the other lid. The one lid is the second lid, and the other lid is the first lid;
13. The portable device according to claim 12, wherein the opening portion of the second lid portion is provided outside the third wall portion and along the third wall portion. Speaker device.   The portable speaker device according to claim 13, wherein the wall portion has a shape protruding radially outward from the first wall portion to the third wall portion. The third wall portion is arranged on one end side of the first wall portion, and the fourth wall portion is arranged on the other end side of the wall portion,
The portable speaker according to claim 14, wherein the fourth wall portion extends in a radial direction outside the first wall portion and restricts rotation of the fitting portion. apparatus. A plurality of the other lid,
The portable speaker device according to claim 15, wherein the plurality of other lid portions are attached to the casing portion in a replaceable manner.   The portable speaker device according to claim 16, wherein the plurality of other lid portions constitute the second air chamber having a volume different from that of the one lid portion. The casing includes an acoustic tube provided on the acoustic radiation side with respect to the speaker unit,
The portable speaker device according to claim 17, wherein an auricle insertion portion is attached to the acoustic tube.   The portable speaker device according to claim 18, wherein the acoustic tube includes a central axis that forms a predetermined angle with respect to a central axis of the casing.   The portable speaker device according to claim 19, wherein the plurality of other lid portions include different sound absorbing members. An electronic apparatus comprising the portable speaker device according to claim 1.

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