JP5629354B2 - headphone - Google Patents

Description

  The present invention relates to a headphone that is used, for example, on a person's head.

  Conventionally, various headphones (see, for example, Patent Document 1) have been used as headphones used on a person's head. The headphone disclosed in Patent Document 1 includes a pair of sound emitting units that house a speaker unit that generates sound, a bridge-shaped arm unit that supports the sound emitting unit, and a headband that is hung on a person's head. And a rotation support portion that rotatably supports the arm portion with respect to the headband.

  The arm portion includes a shaft portion that is rotatably connected to the rotation support portion, a C-shaped ring portion that is arranged along the outer edge portion of the sound emitting portion with a central portion connected to the shaft portion, A rotating shaft portion that protrudes from both ends of the ring portion toward the inside of the ring portion and is rotatably engaged with an outer edge portion of the sound emitting portion.

  In the headphone described above, the rotation support portion positions the sound emitting portion in an arbitrary direction so that the sound emitting portion is brought into close contact with the head, and the reproduced sound generated by the speaker unit is guided to the human ear. .

Japanese Utility Model Publication No. 63-20233

  The headphone disclosed in Patent Document 1 described above is provided so that the sound emitting part and the arm part are rotatable with respect to each other without being biased by a spring or the like, so the direction of the sound emitting part with respect to the arm part changes. It was easy. For this reason, the sound emission part is likely to exceed the rotation allowable range of the arm part, and the rotation support part and the arm part are easily damaged.

  Moreover, since the ring part of an arm part is formed in C shape and distribute | arranged the headphones shown by patent document 1 mentioned above along the outer edge part of a sound emission part, when the said arm part enlarges and carries In addition, a relatively large storage space is required for a traveling bag or the like.

  This invention makes it an example of a subject to cope with such a problem. An object of the present invention is, for example, to provide a headphone that can have a relatively small storage space for carrying and can prevent unexpected damage.

In order to solve the above problems and achieve the object, the headphone of the present invention according to claim 1 is a band plate-like arm portion connected to the headband, and the arm portion via a first connecting portion. And the first connecting portion connects the arm portion to a recess formed in a surface including a central portion on the opposite side of the sound emitting side of the sound emitting portion , The sound emitting portion is characterized in that it can rotate around a first axis along the short direction of the arm portion through the central portion .

It is a perspective view of the headphones concerning one example of the present invention. It is the perspective view which looked at the 2nd and 3rd connection part shown by the II section in Drawing 1, the 2nd maintenance mechanism, etc. from the back side. FIG. 3 is an exploded perspective view of the second and third connecting portions, the second maintenance mechanism, and the like shown in FIG. 2. FIG. 6 is another exploded perspective view of the second and third connecting portions and the second maintenance mechanism shown in FIG. 2. It is a disassembled perspective view of the 2nd maintenance mechanism etc. which were shown by FIG. FIG. 2 is an exploded perspective view of a first connection part and a first maintenance mechanism of the headphones shown in FIG. 1. It is a disassembled perspective view which shows the principal part of the 1st connection part and 1st maintenance mechanism which were shown by FIG. It is sectional drawing which shows the principal part of the 1st connection part and 1st maintenance mechanism which were shown by FIG. It is a perspective view explaining the state which the torsion coil spring shown by FIG. 3 has located the arm part in the neutral position. It is a perspective view explaining the state which the torsion coil spring shown by FIG. 3 is urging | biasing an arm part toward a neutral position. It is sectional drawing which shows the 2nd maintenance mechanism etc. which were shown by FIG. It is sectional drawing which shows the state by which the sound emission part shown by FIG. 11 was folded. It is sectional drawing which shows the principal part of the modification of the 1st connection part shown by FIG. 8, and a 1st maintenance mechanism. It is a disassembled perspective view which shows the principal part of the modification of the 1st connection part and 1st maintenance mechanism which were shown by FIG. It is a perspective view which shows the hole for a connection of the 2nd connection part shown by FIG. FIG. 16 is another perspective view showing a connection hole or the like of the second connecting portion shown in FIG. 15. FIG. 5 is another exploded perspective view of the headphones shown in FIG. 1 such as a first connecting portion and a first maintenance mechanism. It is a perspective view which shows the principal part of the 1st connection part and 1st maintenance mechanism which were shown by FIG. It is a perspective view which shows the principal part of the 1st connection part shown in FIG. 18, and the 1st maintenance mechanism in a cross section.

  Hereinafter, an embodiment of the present invention will be described. In the headphones according to one embodiment of the present invention, a first connecting part that rotatably connects the sound emitting part to the arm part is attached to the central part of the sound emitting part. By doing so, it is possible to suppress an increase in size of the first connecting portion and to reduce the storage space. Moreover, the unexpected breakage of the first connecting portion can be suppressed.

  Moreover, the 1st maintenance means which maintains the relative position of the sound emission part and arm part around the 1st axis is provided. In this way, even when the first connecting portion is provided, it is possible to prevent the sound emitting portion from rotating in small increments relative to the arm portion when carrying, and to suppress the generation of abnormal noise, and the arm portion. Can be prevented from exceeding the allowable rotation range of the first connecting portion, and the first connecting portion and the like can be prevented from being unexpectedly damaged.

  In addition, the first maintaining means may include an end surface of the member to be accommodated that is engaged with each other, an inner surface of the accommodating portion, and a first urging member that urges them in a direction in which they approach each other. In this case, the first maintaining means can reliably maintain the relative positions of the sound emitting portion and the arm portion around the first axis.

  Further, a convex portion may be provided on one of the end surface and the inner surface, and a concave portion may be provided on the other. Moreover, you may form so that these convex parts and recessed parts may extend linearly. In these cases, the first maintaining means can reliably maintain the relative positions of the sound emitting portion and the arm portion around the first axis.

  Further, the first connecting portion may include a notch provided in the arm portion, and an accommodating member that is disposed in the notch and accommodates the first urging member. In this case, since the housing member is disposed in the notch, the first connecting portion can be reduced in size.

  Further, the housing member may include a flat plate portion that is formed in a flat plate shape and is attached to the sound emitting portion, and a cylindrical portion that is connected to the flat plate portion and accommodates the first biasing member. In this case, the arm portion and the sound emitting portion can be connected around the first axis by the first connecting portion without increasing the number of parts.

  The arm portion may be convexly curved in the direction opposite to the acoustic radiation side. In this case, the headphones can be accommodated in a relatively small space.

  Moreover, you may provide the 2nd connection part which connects a headband and an arm part rotatably around the 2nd axis. In this case, the sound emission part can be positioned in an arbitrary direction.

  Further, in addition to the second connecting portion, a third connecting portion that rotatably connects the second connecting portion and the arm portion around a third axis perpendicular to the second axis. You may prepare. In this case, the sound emitting unit can be folded so that the sound emitting unit is in close contact with the headband.

  Further, an urging means may be provided for urging the arm portion toward the neutral position when the arm portion supporting the sound emitting portion is rotated with respect to the headband. In this case, when the arm portion supporting the sound emitting portion is rotated during use and then returned to the neutral position, the arm portion is returned to the neutral position by the urging force of the urging means.

  In this way, when no external force is applied to the sound emission part such as when not in use, the arm part is kept in a neutral position, and the sound emission part is Rotating in small increments can be suppressed, and abnormal noise can be suppressed. Furthermore, since the arm portion, that is, the sound emitting portion is positioned at the neutral position, the arm portion is prevented from exceeding the allowable rotation range of the second connecting portion, and the second connecting portion or the like is unexpectedly damaged. Can be suppressed.

  In the present invention, the urging means includes an annular elastic deformable portion and a pair of rod-like rod-like portions, one rod-like portion is attached to the arm portion, and the other rod-like portion is attached to the headband. You may do it. In this case, the biasing means can bias the arm portion toward the neutral position with a simple structure.

  Moreover, you may provide the 2nd maintenance means which maintains the relative position of the 2nd connection part around the 3rd axis, and an arm part. In this case, even if the third connecting portion is provided in addition to the first and second connecting portions, the sound emitting portion can be prevented from rotating with respect to the headband in the case of carrying, and abnormal noise can be prevented. It is possible to suppress the occurrence, and it is possible to suppress the arm portion from exceeding the rotation allowable range of the third connecting portion, and to prevent the third connecting portion from being damaged unexpectedly.

  Moreover, you may provide the connection member which provided integrally the 1st member for a connection which comprises a 2nd connection part, and the 2nd connection member which comprises a 3rd connection part. In this case, even if a third connecting portion is provided in addition to the first and second connecting portions, an increase in the number of parts can be suppressed.

  Furthermore, the first connecting member may be formed in a cylindrical shape containing the biasing means, and the second connecting member may be formed in a cylindrical shape containing the shaft. In this case, even if the third connecting portion is provided in addition to the first and second connecting portions, the increase in size of the headphones can be suppressed.

  In addition, the second maintaining means is provided on the outer peripheral surface of the second connecting member with an interval in the circumferential direction, and is provided so as to be protruded and retractable from the arm portion and fitted to the fitted portion. A possible fitting member and a second urging member that urges the fitting member toward the outer peripheral surface of the second connecting member may be provided. In this case, the second maintaining means can reliably maintain the relative positions of the second connecting portion and the arm portion around the third axis.

  Further, the arm portion may be provided with a notch for arranging the second connecting member, and the shaft may penetrate the arm portion and the second connecting member. In this case, the size can be reduced.

  Further, a plurality of accommodated members may be provided, and the first urging means may be provided between these accommodated members. In this case, the 1st maintenance means can maintain the relative position of the sound emission part and arm part around the 1st axis more certainly.

  One embodiment of the present invention will be described with reference to FIGS. 1 to 12 and FIGS. 15 to 19. A headphone 1 shown in FIG. 1 is put on a person's head, generates a sound, and transmits this sound (also referred to as sound information) to the person described above.

  As shown in FIG. 1, the headphone 1 includes a headband 2, a pair of arm parts 3, a pair of sound emission parts 4, a pair of second connection parts 5, and a pair of third connection parts 6. And a pair of first connecting portions 7.

  As shown in FIG. 1, the headband 2 includes a main body portion 8 and a pair of expansion / contraction portions 9 that are attached to both end portions of the main body portion 8 so as to be extendable and contracted, and is formed in a C shape. . The headband 2 is formed in a band plate shape that is gently curved along the outer shape of the human head so that the planar shape is C-shaped across the main body portion 8 and the stretchable portion 9. The headband 2 is hung on a person's head.

  The arm 3 extends from one end as an end near the headband 2 to the other end as an end near the sound emission unit 4 in a direction opposite to an acoustic emission side described later of the sound emission unit 4. It is formed in a belt plate shape that is convexly curved. As shown in FIG. 2, one end of the arm 3 is attached to the expansion / contraction part 9, that is, the both ends of the headband 2 via the second connecting part 5 and the third connecting part 6. .

  The sound emitting part 4 is formed in a thick disc shape. The sound emitting unit 4 includes a speaker case 10 made of a hard synthetic resin and formed in a thick disk shape, a speaker unit housed in the speaker case 10, and a cushion member 11. When the headband 2 is put on a person's head, the sound produced by the speaker unit is transmitted to the ear of the speaker case 10 facing the person's ear (hereinafter referred to as an acoustic radiation side). A hole or the like is provided. When the audio current is supplied, the speaker unit generates a sound corresponding to the audio current. The cushion member 11 is made of an elastically deformable material such as foamed polyurethane resin or non-woven fabric, is formed in an annular shape, and is affixed across the acoustic radiation side and the outer edge of the speaker case 10. . The sound emitting part 4 is attached (supported) to the other end of the arm part 3 via the first connecting part 7. By contacting the cushion member 11 so as to cover the human ear, the space formed between the sound emitting unit 4 and the human ear can be made airtight, and the acoustic characteristics can be improved. In addition, transmission of sound from the outside or leakage of sound to the outside can be suppressed.

  As shown in FIG. 3, the second connecting portion 5 is provided on the first connecting member 12 to which the arm portion 3 is attached via the third connecting portion 6 and the like, and the telescopic portion 9, that is, the headband 2. A connecting hole 13, a pair of pressing members 14, a washer 15, and a torsion coil spring 16 as an urging means are provided.

  As shown in FIG. 4, the first connecting member 12 includes a cylindrical body portion 17, and a flange portion 18 that protrudes in the outer circumferential direction from the expansion / contraction portion 9 of the body portion 17, that is, the edge near the headband 2. And.

  The connection hole 13 is formed in a concave shape from the distal end surface of the expansion / contraction part 9, and the planar shape thereof is formed in a round shape, and the flange portion 18 of the first connection member 12 rotates in the connection hole 13. It is formed in a similar shape that is possible. However, it is only necessary that the flange portion 18 is rotatable in the connection hole 13. For example, the flange portion 18 may be formed in a circular shape, and the connection hole 13 may be formed in an elliptical shape or a polygonal shape. On the contrary, the flange portion 18 may be elliptical or polygonal, and the connection hole 13 may be circular, and there is no particular limitation. As shown in FIG. 3, a projection 19 for positioning the convex torsion coil spring 16 from the bottom surface is provided at the center of the bottom surface of the connection hole 13. Further, as shown in FIG. 15, the outer edge portion of the bottom surface of the connection hole 13 is provided with a concave portion 6 that is concave with respect to the bottom surface.

  Further, the flange portion 18 of the first connection member 12 is provided with a convex protrusion 20 to be inserted into the recess 60 of the connection hole 13, and is fitted with the recess 60 of the connection hole 13. The rotation of the first connecting member is restricted. The concave portion 60 of the connection hole 13 is formed to have an arc shape. However, the shape is not particularly limited, and may be any shape that restricts the rotation of the first connection member. It may be formed in a similar manner. In addition, a protrusion may be formed in the connection hole 13 and a recess 60 may be formed in the first connection member, which can be changed as appropriate.

  Further, as shown in FIGS. 11 and 12, the connection hole 13 accommodates the end portion of the main body portion 17 of the first connection member 12 near the headband 2 and the flange portion 18 inside.

  The pair of pressing members 14 are formed in a flat plate shape having a C-shaped planar shape. The pair of pressing members 14 are attached to the stretchable part 9. When the pair of pressing members 14 are attached to the telescopic portion 9, as shown in FIGS. 11 and 12, the first connecting member 12 is positioned between them and the flange between the bottom surface of the connecting hole 13. Position part 18. When the flange portion 18 is positioned between the bottom surface of the connection hole 13 and the pressing member, the first connection member 12 is rotatable around a second axis P2 described later with respect to the headband 2.

  The washer 15 is formed in an annular shape. The washer 15 is accommodated in the connection hole 13 and is disposed at a position near the headband 2 of the main body portion 17. The washer 15 is inserted into the projection 19 for positioning the torsion coil spring 16 together with the torsion coil spring 16, and is fastened and fixed with a screw or the like.

  As shown in FIGS. 9 and 10, the flange portion 18 of the first connecting member 13 is provided with a rotation restricting protrusion 20 and an assembly groove 21. The rotation restricting projection 20 is provided so as to protrude from the surface of the flange portion 18 of the first connecting member 13 near the expandable portion 9. The protrusion 20 for restricting rotation is a connection hole when the first connecting member 12, that is, the arm portion 3 is attached to the expansion / contraction portion 9, that is, the headband 2, and rotated around the second axis P <b> 2 described later. 13, the first connection member 12, that is, the range in which the arm portion 3 can rotate is regulated by contacting the concave portion 60 provided on the bottom surface of 13. The assembling groove 21 is formed in a concave shape from the surface of the flange portion 18 of the first connecting member 13 near the expandable portion 9. The assembling groove 21 accommodates one rod-shaped portion 23 of the torsion coil spring 16 to be described later, and fixes the rod-shaped portion 23.

  When the first connecting member 12 is attached to the expansion / contraction part 9, that is, the headband 2, the second connecting part 5 having the above-described configuration has the second axis P <b> 2 parallel to the direction from the headband 2 toward the arm part 3. Around the headband 2 (shown by a one-dot chain line in FIG. 1 and the like), the first connecting member 12 is rotatable. That is, since the first connecting member 12 is attached to the arm portion 3 via the third connecting portion 6, the headband 2 and the arm portion 3 are rotatably connected around the second axis P2. . The second axis P2 is coaxial with the first connection member 12 (the axis of the first connection member 12).

  The torsion coil spring 16 is made of a wire made of a metal such as iron or phosphor bronze, and as shown in FIGS. 9 and 10, an elastically deformable portion 22 formed into an annular shape by winding this wire, and a rod-like shape And a pair of rod-shaped portions 23 extending from the elastic deformation portion 22 in the outer peripheral direction of the elastic deformation portion 22. The torsion coil spring 16 is accommodated in the first connecting member 12, and the above-described protrusion 19 of the connecting hole 13 is passed through the inside to be positioned. The torsion coil spring 16 has one rod-like portion 23 accommodated in the assembly groove 21 and is attached (fixed) to the expansion / contraction portion 9 together with the washer 15 using a screw or the like. Further, the other rod-like portion 23 of the torsion coil spring 16 is attached (fixed) to the inner surface of the connection hole 13, that is, the headband 2.

  Specifically, as shown in FIG. 15 and FIG. 16, the other rod-shaped portion 23 extends along the side surface of the wall portion 61 having a shape protruding from the bottom surface portion of the connection hole 13, and the wall portion 61. It is fixed to. The wall portion 61 is formed on the opposite side of the concave portion 60 with the torsion coil spring 16 interposed therebetween so as not to hinder the movement of the one rod-shaped portion 23 in the circumferential direction. The wall 61 is formed in a direction that intersects the direction in which the recess 60 extends, but is not limited thereto, and may be formed along the direction in which the recess 60 extends. You may change suitably in order to obtain a desired elastic restoring force.

  The torsion coil spring 16 has one rod-like portion 23 attached to the first connecting member 12 (arm portion 3) and the other rod-like portion 23 attached to the connecting hole 13 (headband 2). When the second connecting portion 5, that is, the arm portion 3 is rotated around the second axis P <b> 2, as shown in FIG. 10, the elastic deformation portion 22 is elastically deformed so as to expand and contract (enlarge and contract). (FIG. 10 shows a case of enlargement) Of course, an elastic restoring force is generated for returning to a neutral state that is not elastically deformed. In FIG. 9, one rod-like portion 23 and the other rod-like portion 23 are drawn from the elastic deformation portion 22 so as to be substantially vertical. However, the present invention is not limited to this, and for example, a predetermined angle such as 120 degrees and the like The plurality of rod-like portions 23 may be pulled out as described above, and can be appropriately changed so as to obtain a predetermined elastic restoring force. Further, instead of the torsion coil spring 16, a single elastic member (for example, a natural resin such as rubber or a resin material such as polyurethane resin such as spunbond) is wound around the projection 19 of the connection hole 13, The elastic restoring force may be obtained and can be changed as appropriate. In the neutral state in which the torsion coil spring 16 shown in FIG. 9 is not elastically deformed, in the neutral position (shown in FIG. 1) where the surface of the telescopic part 9, that is, the headband 2 and the surface of the arm part 3 are substantially parallel to each other. The above-described headband and arm portion 3 are positioned. Thus, the torsion coil spring 16 moves the arm 3 toward the neutral position where the arm 3 and the headband 2 are parallel to each other when the arm 3 is rotated around the second axis P2. It will be energized. In the present specification, the position where the level difference between the arm 3 and the headband 2 is minimized is referred to as a neutral position. In the present specification, the neutral position refers to the surface of the headband 2 and the arm 3. It does not show that the surfaces are completely parallel to each other. In other words, the direction in which the surface of the arm portion 3 extends (direction from the sound emitting portion 4 toward the headband 2) and the direction in which the surface of the headband 2 extends (from the arm portion 3 toward the center portion of the headband 2). The position where the angle between the headband 2 and the surface of the arm portion 3 is completely 0 degrees is referred to as a neutral position. Not in.

  As shown in FIG. 4, the third connecting portion 6 includes a second connecting member 24, a notch 25 provided in the arm portion 3, a through hole 26 provided in the arm portion 3, a shaft 27, and the like. It has.

  The second connecting member 24 is formed in a cylindrical shape. The second connecting member 24 is connected to the end of the first connecting member 12 in a state where the axis of the second connecting member 24 intersects the axis of the first connecting member 12 (orthogonal in the illustrated example). It is formed integrally with the connecting member 12. That is, the second connecting member 24 is provided integrally with the first connecting member 12 to form the connecting member 28. As described above, the headphone 1 includes the connection member 28.

  The notch 25 is provided at one end of the arm 3 (corresponding to an end near the headband 2), and a part of the arm 3 extends from the end of the one end toward the center of the arm 3. It is shaped like a cut. The notch 25 has the second connecting member 24 disposed inside. The through hole 26 is provided at one end of the arm 3. The through hole 26 is a hole having a round cross-sectional shape, and is provided at a position that is coaxial (communication) with the second connecting member 24 disposed in the notch 25.

  The shaft 27 is formed in a cylindrical shape whose outer diameter changes stepwise. The shaft 27 is passed through the through hole 26 and the second connecting member 24. That is, the shaft 27 passes through the arm portion 3 and the second connecting member 24. The shaft 27 is fixed to the arm 3 by a fixing bolt 29 (shown in FIG. 4). The second connecting member 24 is attached to the arm portion 3 by fixing the shaft 27 passed through the second connecting member 24 to the arm portion 3 by the fixing bolt 29. Further, since the shaft 27 is passed inside, the second connecting member 24 naturally accommodates the shaft 27. Further, when the shaft 27 passed through the second connecting member 24 is fixed to the arm portion 3 by the fixing bolt 29, the second connecting member 24 is substantially parallel to the width direction of the headband 2 and is The arm 3 is rotatable around a third axis P3 orthogonal to the second axis P2.

  The 3rd connection part 6 of the structure mentioned above connects the 2nd connection part 5 and the arm part 3 rotatably around the 3rd axis P3 (it shows with a dashed-dotted line in FIG. 1 etc.). The third axis P3 is coaxial with the second connection member 24 (the axis of the second connection member 24). In this way, the third connecting portion 6 rotates the arm portion 3 around the third axis P3 with respect to the second connecting portion 5, that is, the headband 2, and the sound emitting portion 4 shown in FIG. The arm 3, that is, the sound emission part 4, is displaceable over the position where the sound emission part 4 is folded and the position where the sound emission part 4 shown in FIG. 12 is folded.

  Further, as shown in FIG. 5, the headphone 1 includes a second maintenance mechanism 30 as a second maintenance unit. As shown in FIG. 5, the second maintenance mechanism 30 includes a plurality of concave grooves 31, a plurality of round dents 32 as a plurality of fitted portions, and a plurality of receiving holes 33 (shown in FIGS. 11 and 12). A projection plate 34 as a plurality of fitting members and a coil spring 35 as a plurality of second urging members are provided.

  In the illustrated example, two concave grooves 31 are provided. The concave grooves 31 are concave from the outer peripheral surface of the second connecting member 24 and extend along the circumferential direction of the second connecting member 24. The two concave grooves 31 are arranged at intervals from each other along the axis of the second connecting member 24, that is, the third axis P <b> 3. The number of the concave grooves 31 is not limited to two, and a plurality of the concave grooves 31 may be formed, such as three or four, and a plurality of round dents 32 are formed as the fitted portions so as to correspond to the number of the concave grooves 31. It doesn't matter.

  A plurality of round recesses 32 are provided on each recess 31. In the illustrated example, two round recesses 32 are provided in each recess groove 31, that is, a total of four. The round recesses 32 are provided at intervals from each other along the longitudinal direction of the recessed groove 31, that is, the circumferential direction of the second connecting member 24. The round recess 32 is formed as a recess from the outer peripheral surface of the second connecting member 24 and the bottom surface of the groove 31. The round shape of the round recess 32 is round. Instead of the round recess 32, a recess having an elliptical or polygonal shape may be formed on the outer peripheral surface of the second connecting member 24, and can be changed as appropriate.

  In the illustrated example, two accommodation holes 33 are provided. The accommodation hole 33 is provided at the above-described end portion of the arm portion 3, and its opening portion is opposed to the concave groove 31 provided in the second connecting member 24.

  In the illustrated example, two protrusion plates 34 are provided. The protrusion plate 34 is integrally provided with a hemispherical spherical portion 36 and a columnar columnar portion 37 that is continuous with the flat bottom surface of the spherical portion 36. The spherical portion 36 and the columnar portion 37 are arranged coaxially with each other. The spherical portion 36 comes into close contact with the bottom surface of the round recess 32 and fits into the round recess 32. Further, the columnar part 37 is formed with a smaller diameter than the spherical part 36. The protruding plate 34 is loosely inserted into the accommodation hole 33 with the spherical portion 36 facing the second connecting member 24. The protruding plate 34 is provided so as to be able to project and retract from the arm portion 3 toward the second connecting member 24 by being loosely inserted into the accommodation hole 33. Further, since the spherical portion 36 is fitted into the round recess 32, the protruding plate 34 can be fitted into the round recess 32. It suffices if the spherical portion 36 is formed in a shape corresponding to the round recess 32. When the oval or polygonal recess is formed in place of the round recess 32, the spherical portion 36 is formed in an elliptical shape. It may be a part or a polygonal part, and can be changed as appropriate.

  In the illustrated example, two coil springs 35 are provided. The coil spring 35 is housed in the housing hole 33 and is provided between the bottom surface of the housing hole 33 and the protruding plate 34. The coil spring 35 is provided between the bottom surface of the accommodation hole 33 and the projection plate 34 to urge the projection plate 34 toward the second connecting member 24. Instead of the coil spring 35, a member made of rubber or a member made of polyurethane resin may be arranged as the elastic member, and it is sufficient if the protruding plate 34 can be biased toward the second connecting member 24. Instead of the coil spring 35, a known elastic member may be appropriately selected and used for the purpose of appropriately adjusting the urging force.

  In the second maintenance mechanism 30 having the above-described configuration, the coil spring 35 urges the projection plate 34 toward the second connecting member 24, and the projection plate 34 is accommodated in the accommodation hole 33 facing the concave groove 31. As a result, the spherical portion 36 of the projection plate 34 is in close contact with the concave groove 31. And the 2nd maintenance mechanism 30 makes the 2nd connection around the 3rd axis P3 because spherical part 36 of projection plate 34 approachs round recess 32, and fits in this round recess 32. The relative position of the part 5 and the arm part 3 is maintained.

  As shown in FIGS. 6, 8, and 17 to 19, the first connecting portion 7 is integrated with the case holder 38 as a housing member attached to the sound emitting portion 4, the notch 39, and the arm portion 3. And a connecting shaft for fixing 41, and a connecting shaft for sliding 42 as a member to be accommodated.

  The case holder 38 includes a holder main body 43 as a flat plate portion attached to the central portion of the sound emitting portion 4 on the back side (reverse side) of the sound emission side, and a cylindrical tubular portion connected to the holder main body 43. 44 are integrally provided. The holder main body 43 is fixed to the central portion on the back side of the sound emitting unit 4 described above. That is, the holder main body 43 is attached to the sound emitting unit 4. The cylindrical portion 44 is formed in a cylindrical shape, and its axis is disposed substantially parallel to the surface of the holder main body 43. The cylindrical portion 44, that is, the case holder 38 accommodates a coil spring 51 described later.

  The notch 39 is provided at the other end of the arm 3 (corresponding to the end near the sound emitting unit 4), and the arm 3 is moved from the end of the other end toward the center of the arm 3. It is shaped like a part cut. The notch 39 has the cylindrical portion 44 of the case holder 38 disposed inside.

  The accommodating portion 40 is formed in a bottomed cylindrical shape, and a pair (that is, a plurality) of the other end portions of the arm portion 3 are provided. The accommodating portion 40 opens in the notch 39. The accommodating portion 40 is provided at a position that is coaxial (communicate) with the cylindrical portion 44 of the case holder 38 disposed in the notch 39. Moreover, the accommodating part 40 is arrange | positioned in the position which positions the shafts 41 and 42 and the coil spring 51 which are mentioned later between each other.

  The fixing connecting shaft 41 is integrally provided with a flat plate-like fixing portion 45, a standing portion 46 erected from the fixing portion 45, and a columnar cylindrical portion 47 having one end connected to the standing portion 46. ing. The fixing portion 45 is superimposed on the above-described back side of the sound emitting portion 4 and is fixed to the sound emitting portion 4. The cylindrical portion 47 is accommodated in the case holder 38, and a tip portion thereof enters the accommodating portion 40. The cylindrical portion 47 enters the housing portion 40 and is rotatable with respect to the housing portion 40.

  The slide connection shaft 42 is formed in a cylindrical shape. The slide connection shaft 42 is accommodated in the cylindrical portion 44 of the case holder 38, and a tip portion thereof enters the accommodation portion 40. The slide connection shaft 42 is accommodated in the cylindrical portion 44 of the case holder 38, so that the slide connection shaft 42 is provided in the sound emitting portion 4 via the case holder 38. The slide connection shaft 42 is housed in the housing portion 40 so as to be rotatable relative to the housing portion 40 around the first axis P <b> 1 by the tip portion entering the housing portion 40. . The slide connection shaft 42 enters the housing portion 40 and is rotatable with respect to the housing portion 40. Furthermore, the slide connection shaft 42 is provided so as to be movable along its axis.

In the first connecting portion 7 having the above-described configuration, the cylindrical portion 47 of the fixing connection shaft 41 and the sliding connection shaft 42 are rotatable with respect to the housing portion 40, so that the arm portion 3 is connected to the arm portion. 3 is connected to the sound emitting part 4 so as to be rotatable around a first axis P1 (indicated by a one-dot chain line in FIG. 1) along the width direction 3. The first shaft core P1 is parallel to the third shaft core P3 in a state where the first connecting member 12 of the second connecting portion 5 is positioned at the neutral position.

  The case holder 38 constituting the first connecting portion 7 is arranged so that the cylindrical portion 44 passes through the opening 55 formed near the center portion of the speaker case 10 and protrudes toward the arm portion 3. Is done. A fastening member (screw) is inserted into a through-hole portion 62 formed in the case holder 38 and is inserted into a concave portion 63 formed in the speaker case 10 and threaded on the inner surface, whereby the case holder 38 is connected to the speaker case 10. Fixed to. The protrusion 57 of the spring support member 54 is inserted into the case holder 38 in order to support the slide connection shaft 42 accommodated in the case holder 38 and the coil spring 51 in the case holder 38. A fastening member (screw) or the like that passes through a through-hole portion 59 formed in the spring support member 54 is inserted into the recess 58 formed in the speaker case 10 and whose inner surface is threaded, and the spring support member serves as the speaker case 10. Fixed to.

  The headphone 1 also includes a first maintenance mechanism 48 as a first maintenance means. As shown in FIG. 7, the first maintenance mechanism 48 includes a back surface 52 as an inner surface of the housing portion 40 formed so that the housing portion 40 and the slide connection shaft 42 are engaged with each other, and a slide connection shaft 42. End surface 53, a straight convex portion 49 as a convex portion, a linear concave portion 50 as a concave portion, and a coil spring 51 (shown in FIG. 8) as a first biasing member.

  The straight convex portion 49 is provided so as to protrude from the innermost surface of the accommodating portion 40 into which the slide connection shaft 42 of each first connecting portion 7 enters, from the innermost surface 52 located at the innermost portion of the accommodating portion 40. The back surface 52 is opposed to an end surface 53 (described later) of the slide connection shaft 42. The straight convex portion 49 passes through the center of the back surface 52 and extends linearly.

  The linear recess 50 is provided in a recess from the end surface 53 located on the innermost side of the accommodating portion 40 of the slide connection shaft 42 of each first connecting portion 7. The linear recess 50 extends linearly through the center of the end surface 53. The linear convex portion 49 can enter the linear concave portion 50. When the linear convex portion 49 enters the linear concave portion 50, the outer surface of the linear convex portion 49 and the inner surface of the linear concave portion 50 come into close contact with each other, and the end surface 53 and the back surface 52 come into close contact with each other. The outer surface of the linear convex portion 49 and the inner surface of the linear concave portion 50 are in intimate contact, and the end surface 53 and the inner surface 52 are in intimate contact with each other, whereby the linear convex portion 49 and the linear concave portion 50 are engaged with each other. Match.

  The coil spring 51 is provided between the slide connection shaft 42 and the fixed connection shaft 41 of each first connecting portion 7, and the slide connection shaft 42 is moved toward the back of the housing portion 40, that is, the end surface. 53 is urged toward the back surface 52. The coil spring 51 is disposed between the shafts 41 and 42 by a spring support member 54 (shown in FIG. 8) attached to the sound emitting unit 4. Instead of the coil spring 51, a member made of rubber as an elastic member or a member made of polyurethane resin may be arranged, and the slide connection shaft 42 is moved toward the back of the housing portion 40, that is, It is sufficient that the end surface 53 can be biased in a direction approaching the back surface 52, and a known elastic member may be appropriately selected and used instead of the coil spring 51 for the purpose of appropriately adjusting the biasing force. Moreover, the linear convex part 49 and the linear recessed part 50 should just be mutually engaged, and do not need to extend linearly.

  In the first maintenance mechanism 48 configured as described above, the coil spring 51 urges the slide connection shaft 42 toward the back of the housing portion 40, and the linear convex portion 49 and the linear concave portion 50 are engaged with each other. The relative positions of the sound emitting part 4 and the arm part 3 around the first axis P1 are maintained.

  In the headphone 1 having the above-described configuration, the headband 2 is hung on the person's head, and the cushion member 11 of the sound emitting unit 4 covers the person's ear. Supplied to generate a sound corresponding to the audio current and transmit the sound to a person.

  According to the present embodiment, the first connecting portion 7 that rotatably connects the sound emitting portion 4 to the arm portion 3 is attached to the central portion of the sound emitting portion 4. For this reason, the enlargement of the 1st connection part 7 can be suppressed and a storage space can be made comparatively small. Moreover, the unexpected damage of the said 1st connection part 7 can be suppressed.

  Moreover, the 1st maintenance mechanism 48 which maintains the relative position of the sound emission part 4 and the arm part 3 around the 1st axial center P1 is provided. For this reason, even when the first connecting portion 7 is provided, it is possible to prevent the sound emitting portion 4 from rotating with respect to the arm portion 3 in the case of carrying, and to suppress the generation of abnormal noise, and the arm. It can suppress that the part 3 exceeds the rotation allowable range of the 1st connection part 7, and can suppress that the 1st connection part 7 etc. are damaged unexpectedly.

  Moreover, the 1st maintenance mechanism 48 is provided with the back surface 52 and the end surface 53 which mutually engage, and the coil spring 51 which urges | biases in the direction in which these mutually approach. Furthermore, the straight convex part 49 is provided in the back surface 52, the linear recessed part 50 is provided in the end surface 53, and these linear convex part 49 and the linear recessed part 50 are extended linearly. For this reason, the 1st maintenance mechanism 48 can maintain the relative position of the sound emission part 4 and the arm part 3 around the 1st axial center P1 reliably.

  Further, a plurality of slide connection shafts 42 are provided, and a coil spring 51 is provided between the slide connection shafts 42. For this reason, the 1st maintenance mechanism 48 can maintain the relative position of the sound emission part 4 and the arm part 3 around the 1st axial center P1 more reliably.

  The first connecting portion 7 includes a notch 39 provided in the arm portion 3 and a case holder 38 that is disposed in the notch 39 and accommodates the coil spring 51. For this reason, since the case holder 38 is arranged in the notch 39, the 1st connection part 7 can be reduced in size.

  Further, the case holder 38 includes a holder main body 43 that is formed in a flat plate shape and is attached to the sound emitting unit 4, and a cylindrical portion 44 that is connected to the holder main body 43 and accommodates the coil spring 51. For this reason, the arm part 3 and the sound emission part 4 can be connected around the first axis P <b> 1 by the first connecting part 7 without increasing the number of parts.

  The arm 3 is convexly curved in the direction opposite to the acoustic radiation side. For this reason, when accommodating the headphones 1, it can accommodate in a comparatively small space.

  Moreover, the 2nd connection part 5 which connects the headband 2 and the arm part 3 around the 2nd axis P2 rotatably is provided. For this reason, the sound emission part 4 can be positioned in more arbitrary directions.

  Further, in addition to the second connecting portion 5, the second connecting portion 5 and the arm portion 3 are rotatably connected around a third axis P3 orthogonal to the second axis P2. 3 connecting portions 6 are provided. For this reason, the sound emission part 4 can be folded so that the sound emission part 4 is in close contact with the headband 2.

  In addition, a torsion coil spring 16 is provided that biases the arm 3 toward the neutral position when the arm 3 supporting the sound emitting unit 4 is rotated with respect to the headband 2. For this reason, when the arm 3 supporting the sound emitting unit 4 is rotated during use and then returned to the neutral position, the arm 3 is returned to the neutral position by the biasing force of the torsion coil spring 16.

  As described above, when no external force is applied to the sound emitting unit 4 such as when not in use, the arm unit 3 is kept in the neutral position, and the sound emitting unit 4 is attached to the headband 2 when being carried. On the other hand, it is possible to suppress the rotation in small increments and to suppress the generation of abnormal noise. Furthermore, since the arm portion 3, that is, the sound emitting portion 4 is positioned at the neutral position, the arm portion 3 is prevented from exceeding the allowable rotation range of the second connecting portion 5, and the second connecting portion 5 and the like are unexpectedly formed. Can be prevented from being damaged.

  In the present invention, the torsion coil spring 16 includes an annular elastic deformation portion 22 and a pair of rod-like rod-like portions 23, and one rod-like portion 23 is attached to the arm portion 3, and the other rod-like portion. 23 is attached to the headband 2. For this reason, the torsion coil spring 16 can urge the arm portion 3 toward the neutral position with a simple structure.

  Moreover, the 2nd maintenance mechanism 30 which maintains the relative position of the 2nd connection part 5 around the 3rd axis P3 and the arm part 3 is provided. For this reason, even if the third connecting portion 6 is provided in addition to the first and second connecting portions 5 and 7, the sound emitting portion 4 is rotated with respect to the headband 2 in a small amount during carrying. It is possible to suppress the generation of abnormal noise, and it is possible to prevent the arm portion 3 from exceeding the allowable rotation range of the third connecting portion 6 and to unexpectedly damage the third connecting portion 6 or the like. Can be suppressed.

  In addition, a connection member 28 is provided in which the first connection member 12 constituting the second connection portion 5 and the second connection member 24 constituting the third connection portion 6 are integrally provided. For this reason, it is possible to suppress an increase in the size of the headphones as compared with the case where the first connecting member 12 and the second connecting member 24 are provided separately, and the first and second connecting portions 5 and 7. In addition to this, even if the third connecting portion 6 is provided, an increase in the number of parts can be suppressed.

  Further, the first connecting member 12 is formed in a cylindrical shape containing the torsion coil spring 16, and the second connecting member 24 is formed in a cylindrical shape containing the shaft 27. For this reason, even if the 3rd connection part 6 is provided in addition to the 1st and 2nd connection parts 5 and 7, the enlargement of the headphones 1 can be suppressed.

  Further, the second maintaining mechanism 30 is provided with a circular recess 32 provided in the outer peripheral surface of the second connecting member 24 with a circumferential interval, and a circular recess 32 provided so as to be protruded and retractable from the arm portion 3. And a coil spring 35 that urges the protrusion plate 34 toward the outer peripheral surface of the second connecting member 24. For this reason, the 2nd maintenance mechanism 30 can maintain the relative position of the 2nd connection part 5 and the arm part 3 around the 3rd axial center P3 reliably.

  Further, the arm 3 is provided with a notch 25 in which the second connecting member 24 is disposed, and the shaft 27 passes through the arm 3 and the second connecting member 24. For this reason, size reduction can be achieved.

  In the above-described embodiment, each first connecting portion 7 includes a fixing connecting shaft 41 and a sliding connecting shaft 42. In the present invention, as shown in FIG. May be provided with a pair, that is, a plurality of slide connection shafts 42, and the coil spring 51 of the first maintaining mechanism 48 may be provided between the pair, that is, the plurality of slide connection shafts 42. In this case, the first maintaining mechanism 48 can more reliably maintain the relative positions of the sound emitting unit 4 and the arm unit 3 around the first axis P1. In FIG. 13, the same parts as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Further, in the embodiment described above, the linear convex portion 49 is provided on the back surface 52 and the linear concave portion 50 is provided on the end surface 53. However, in the present invention, the linear convex portion 49 is provided on the end surface 53 as shown in FIG. The linear recess 50 may be provided on the back surface 52. In FIG. 14, the same parts as those in the above-described embodiment are designated by the same reference numerals and the description thereof is omitted.

  According to the embodiment described above, the following headphones 1 are obtained.

(Appendix) Headband 2 and
A belt-like arm portion 3 connected to the headband 2;
A sound emission part 4 supported by the arm part 3;
A first connecting part that rotatably connects the arm part 3 to a central part on the opposite side of the sound emitting side of the sound emitting part 4 around a first axis P1 along the width direction of the arm part 3. 7 and
A first maintaining mechanism 48 for maintaining a relative position between the sound emitting portion 4 and the arm portion 3 around the first axis P1;
Headphones characterized by comprising.

  According to the supplementary note, the first connecting portion 7 that rotatably connects the sound emitting portion 4 to the arm portion 3 is attached to the central portion of the sound emitting portion 4. For this reason, the enlargement of the 1st connection part 7 can be suppressed and a storage space can be made comparatively small. Moreover, the unexpected damage of the said 1st connection part 7 can be suppressed.

  Moreover, the 1st maintenance mechanism 48 which maintains the relative position of the sound emission part 4 and the arm part 3 around the 1st axial center P1 is provided. For this reason, even if the first connecting portion 7 is provided, it is possible to prevent the sound emitting portion 4 from rotating with respect to the arm portion 3 in the case of carrying, and to suppress the generation of abnormal noise, It can suppress that the part 3 exceeds the rotation allowable range of the 1st connection part 7, and can suppress that the 1st connection part 7 etc. are damaged unexpectedly.

  In addition, the Example mentioned above only showed the typical form of this invention, and this invention is not limited to an Example. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Headphone 2 Headband 3 Arm part 4 Sound emission part 5 2nd connection part 6 3rd connection part 7 1st connection part 12 1st connection member 16 Torsion coil spring (biasing means)
DESCRIPTION OF SYMBOLS 22 Elastic deformation part 23 Rod-shaped part 24 2nd connection member 25 Notch 27 Shaft 28 Connection member 30 2nd maintenance mechanism (2nd maintenance means)
32 Round dent (Fitting part)
34 Projection plate (fitting member)
35 Coil spring (second biasing member)
38 Case holder (housing member)
39 Notch 40 Accommodating part 42 Connecting shaft for slide (accommodated member)
43 Holder body (flat plate)
44 cylindrical portion 48 first maintenance mechanism (first maintenance means)
49 Straight convex part (convex part)
50 Straight recess (recess)
51 Coil spring (first biasing member)
52 Back (inner surface)
58 End face P1 First axis P2 Second axis P3 Third axis

Claims (6)

A headband,
A belt-like arm connected to the headband;
A sound emitting part connected to the arm part via a first connecting part ;
With
The first connecting portion connects the arm portion to a recess formed on a surface including a central portion on the opposite side of the sound emitting portion of the sound emitting portion ,
The headphone characterized in that the sound emitting part is rotatable around a first axis along the short direction of the arm part through the central part . The headphone according to claim 1, wherein one end in a longitudinal direction of the arm portion and the concave portion of the sound emitting portion are connected via the first connecting portion. The headphone according to claim 1, wherein a sound radiation direction of the sound emitting unit and the first axis are perpendicular to each other. The headphone according to claim 2, wherein the arm portion is curved in a direction opposite to the acoustic radiation side of the sound emitting portion from the one end to the other end opposite to the one end. The headphone according to claim 2, wherein the concave portion is a substantially rectangular shape having a short side direction and a long side direction, and the length in the short side direction is larger than the length of the width of the one end of the arm portion. . The headphone according to claim 5, wherein the longitudinal direction of the recess is perpendicular to the first axis.

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