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There is provided a headphone having a pair of units being attached to both ends of a band, and at least one of the units being made slidable relative to the band. The headphone comprises a slider that supports the unit, accommodates a part of a cord for connecting end parts of the band and the unit

There is provided a headphone having a pair of units being attached to both ends of a band, and at least one of the units being made slidable relative to the band. The headphone comprises a slider that supports the unit, accommodates a part of a cord for connecting end parts of the band and the unit, and includes an engaged part for regulating a sliding range of the unit, a slider guide fixed to an end part of the band and inserted through the slider, for guiding a sliding motion of the slider in the sliding motion of the unit, and an engaging part having approximately the same width as that of the engaged part, attached to the end part of the band, and engaged with the engaged part so as to be locked to the end part of the engaged part in the sliding motion of the unit.

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1. A headphone having a band through which a twin-cord wiring connecting a pair of headphone units is inserted, the pair of headphone units being attached to both ends of the headphone, and at least one of the pair of headphone units being made slidable relative to the band, comprising: a hollow sli

1. A headphone having a band through which a twin-cord wiring connecting a pair of headphone units is inserted, the pair of headphone units being attached to both ends of the headphone, and at least one of the pair of headphone units being made slidable relative to the band, comprising: a hollow slider that supports the slidable headphone unit, accommodates an extension part of the twin-cord wiring for connecting wiring positioned at the end of the band with the slidable headphone unit, and includes an engaged part for regulating a sliding range of the headphone unit in the longitudinal direction of the band;a slider guide fixed to an end part of the band and inserted through the slider, for guiding a sliding motion of the slider when the headphone unit is sliding relative to the band, wherein the sliding motion is regulated by friction and is stepless; andan engaging part having approximately the same width as the width of the engaged part in a direction orthogonal to the longitudinal axis of the slider, attached to the end part of the band, and engaged with the engaged part so as to be locked to the end part of the engaged part when the headphone unit is sliding relative to the band. 2. The headphone according to claim 1, wherein the engaged part is provided as a slide groove passing through a side face of the slider, and the engaging part is provided as a projection member engaged with the slide groove. 3. The headphone according to claim 2, wherein an elastic slide regulation part is further disposed between the slider guide and the slider, in a state of being pressed against an inner surface of the slider. 4. The headphone according to claim 3, wherein the slide regulation part is made integral with the slider guide. 5. The headphone according to claim 1, wherein the engaged part is provided on an inner surface of the slider as an engaging recess part, and the engaging part is provided in the slider guide as a projection part engaged with the engaging recess part. 6. The headphone according to claim 1, wherein a cord insertion hole through which the twin-cord wiring is inserted is provided in the slider guide. 7. The headphone according to claim 3, wherein a cord insertion hole through which twin-cord wiring is inserted is provided in the slide regulation part. 8. The headphone according to claim 1, wherein the extension part of the twin-cord is formed as a curl cord. 9. The headphone according to claim 8, wherein the curl cord portion of the twin cord is configured to extend when the headphone unit is moved away from the band, and configured to contract when the headphone unit is moved toward the band. 10. The headphone according to claim 1, wherein the friction regulating the sliding motion is between the surface of the slider guide and the internal surface of the slider. 11. The headphone according to claim 3, wherein the friction regulating the sliding motion is between the surface of the elastic slide regulation part and the internal surface of the slider. 12. The headphone according to claim 1, where both headphone units of said pair of headphone units are made slidable relative to the band. 13. A headphone having a band through which a twin-cord wiring connecting a pair of headphone units is inserted, the pair of headphone units being attached to both ends of the headphone, and at least one of the pair of headphone units being made slidable relative to the band, comprising: a hollow slider that supports the slidable headphone unit, accommodates an extension part of the twin-cord wiring for connecting wiring positioned at the end of the band with the slidable headphone unit, and includes an engaged part for regulating a sliding range of the headphone unit in the longitudinal direction of the band;a slider guide fixed to an end part of the band and inserted through the slider, for guiding a sliding motion of the slider when the headphone unit is sliding relative to the band, wherein the sliding motion is regulated by friction; andan engaging part having approximately the same width as the width of the engaged part in a direction orthogonal to the longitudinal axis of the slider, attached to the end part of the band, and engaged with the engaged part so as to be locked to the end part of the engaged part when the headphone unit is sliding relative to the band,wherein:the engaged part is provided as a slide groove passing through a side face of the slider;the engaging part is provided as a projection member engaged with the slide groove;an elastic slide regulation part is further disposed between the slider guide and the slider, in a state of being pressed against an inner surface of the slider; andthe friction regulating the sliding motion is between the surface of the elastic slide regulation part and the internal surface of the slider. 14. The headphone according to claim 13, wherein the slide regulation part is made integral with the slider guide. 15. The headphone according to claim 13, wherein the engaged part is provided on an inner surface of the slider as an engaging recess part, and the engaging part is provided in the slider guide as a projection part engaged with the engaging recess part. 16. The headphone according to claim 13, wherein a cord insertion hole through which the twin-cord wiring is inserted is provided in the slider guide. 17. The headphone according to claim 13, wherein a cord insertion hole through which twin-cord wiring is inserted is provided in the slide regulation part. 18. The headphone according to claim 13, wherein the extension part of the twin-cord is formed as a curl cord. 19. The headphone according to claim 18, wherein the curl cord portion of the twin cord is configured to extend when the headphone unit is moved away from the band, and configured to contract when the headphone unit is moved toward the band. 20. The headphone according to claim 13, wherein the friction regulating the sliding motion is between the surface of the slider guide and the internal surface of the slider. 21. The headphone according to claim 13, where both headphone units of said pair of headphone units are made slidable relative to the band.