Headphones

Abstract

Headphones S100 comprise: a head band 10; a headphone unit 20; a slider-holding part 40 provided to the head band 10; and a slider member 30 having a unit connection part 31 that is connected to the headphone unit 20 and a slider plate 35 that is inserted into the slider-holding part. The slider-holding part 40 includes: a housing 41 for holding the slider plate 35 in such a manner that the slider plate 35 can rotate around an axis L1 extending in parallel with the extension direction of the slider plate 35; and a biasing member 45 disposed within the housing 41, the biasing member elastically deforming when the slider plate 35 rotates in a first direction around the axis L1 to apply, to the slider plate 35, biasing force in a second direction opposite from the first direction.

Description

headphone

[0001] The present invention relates to headphones.

[0002] 2. Description of the Related Art Conventionally, there is known a headphone including a headphone unit, a headband, and a slider, in which the length of the slider protruding from the headband is adjustable (see, for example, Patent Document 1).

[0003] JP 2016-82349 A

[0004] However, with the conventional configuration, when the headphones are worn on the user's head and the headphone unit is in close contact with the side of the head, the headphone unit rotates slightly around an axis extending in the direction of the slider so as to follow the curve of the side of the head, which can reduce the comfort of wearing the headphones.

[0005] The present invention has been made in consideration of these points, and has as its object to provide headphones that are comfortable to wear.

[0006] A headphone according to one embodiment of the present invention comprises a headband, a headphone unit, a slider holding portion provided on the headband, a unit connection portion connected to the headphone unit, and a slider member having a slider plate inserted into the slider holding portion, wherein the slider holding portion includes a housing that holds the slider plate in a manner that allows the slider plate to rotate around an axis extending parallel to the extension direction of the slider plate, and a biasing member that is disposed within the housing and elastically deforms when the slider plate rotates around the axis in a first direction to apply a biasing force to the slider plate in a second direction opposite to the first direction.

[0007] The slider plate may have a plurality of first engagement portions formed at predetermined intervals along the extension direction of the slider plate, and the biasing member may have second engagement portions that engage with the first engagement portions to determine the position of the slider plate in the extension direction of the slider plate.

[0008] The first engagement portion may be a recess formed in the slider plate, and the second engagement portion may be a protrusion formed in the biasing member that fits into the recess while being pressed against the recess by the biasing force of the biasing member.

[0009] The slider plate may have a slit formed along the longitudinal direction of the slider plate, a first extension portion provided on one side of the slit in the width direction, and a second extension portion provided on the other side of the slit in the width direction, wherein the first extension portion has a plurality of first recesses as the recess, and the second extension portion has a plurality of second recesses as the recess, and the biasing member may have a first convex portion that fits into the first recess and a second convex portion that fits into the second recess.

[0010] The first recesses and the second recesses may have the same shape, and the number of the first recesses may be the same as the number of the second recesses.

[0011] The biasing member may be a leaf spring and may have a central portion fixed to the housing inside the slit, a first leaf spring portion extending from the central portion toward the first extension portion and having the first convex portion formed thereon, and a second leaf spring portion extending from the central portion toward the second extension portion and having the second convex portion formed thereon.

[0012] The first leaf spring portion may have a curved portion between the central portion and the first convex portion for lengthening the first leaf spring portion, and the second leaf spring portion may have a curved portion between the central portion and the second convex portion for lengthening the second leaf spring portion.

[0013] The housing may have a base having a recess with an arc-shaped cross section, a plate fixing member fixed to the slider plate, the plate fixing member having a protrusion including an arc-shaped cross section, and the slider plate may be configured to rotate around the longitudinal axis of the slider plate by the protrusion moving in a rolling manner in the recess of the base.

[0014] The plate fixing member may have an opening that forms a space in which the biasing member is disposed, and the biasing member may have a first wall formed on one longitudinal side of the slider plate and a second wall formed on the other longitudinal side of the slider plate, and when the biasing member is disposed within the opening, the first wall may face a part of an inner circumferential wall of the opening and the second wall may face another part of the inner circumferential wall of the opening, thereby preventing the biasing member from moving in the longitudinal direction inside the opening.

[0015] The present invention has the effect of providing headphones that are comfortable to wear.

[0016] 11 is a perspective view showing headphones according to one embodiment of the present invention; FIG. 12 is an exploded perspective view of a slider holding portion; FIG. 13 is an exploded perspective view of the slider holding portion; FIG. 14 is a view showing the slider holding portion and a slider member; FIG. 15 is a schematic view of the headphones worn by a user, as viewed from the top; FIG. 16 is a schematic view of the housing, as viewed from the top; FIG. 17 is a perspective view showing the assembled state of the slider plate, the plate fixing member, and the biasing member; FIG. 18 is a perspective view of the biasing member; FIG. 19 is a perspective view showing the positional relationship between the biasing member and the plate fixing member; FIG. 19 is a cross-sectional view for explaining the function of the biasing member; FIG. 11 is a perspective view showing a modified example of the engaging portion of the slider plate; FIG. 12 is a cross-sectional view for explaining the cross-sectional shape of the engaging portion of FIG.

[0017] Fig. 1 is a perspective view showing a headphone according to an embodiment of the present invention. Fig. 2 is an exploded perspective view of a slider holding portion. Fig. 3 is an exploded perspective view of the slider holding portion. Fig. 4 is a view showing the slider holding portion and a slider member.

[0018] As shown in Fig. 1, the headphones S100 include a headband 10, a headphone unit 20, a slider member 30, and a slider holder 40. In this example, the headphone unit 20 shown in Fig. 1 is a unit for the left ear. One of the pair of headphone units is not shown in Fig. 1.

[0019] The headband 10 is, for example, a metal member having an arc-shaped curved shape, and is formed of an elastically deformable member so that the left-ear headphone unit 20 and the right-ear headphone unit 20 move apart when the headphones S100 are worn by a user.

[0020] The headphone unit 20 has a housing 21, ear pads 22, and a speaker unit (not shown). The housing 21 is a member that houses the speaker unit that generates sound. The ear pads 22 are elastic members attached to a part of the housing 21.

[0021] The slider member 30 is a member for connecting the headphone unit 20 to the headband 10. As shown in Figures 1 and 2, the slider member 30 includes a unit connection portion 31 and a slider plate 35. As an example, the slider member 30 is a metal member in which the unit connection portion 31 and the slider plate 35 are integrally formed.

[0022] The unit connection portion 31 is a portion that is connected to the headphone unit 20. The unit connection portion 31 has an arc-like shape, for example. Specifically, as shown in FIG. 2 , the unit connection portion 31 has a first extension portion 32-1 and a second extension portion 32-2. The unit connection portion 31 is connected to the headphone unit 20 by attaching an end portion of the first extension portion 32-1 and an end portion of the second extension portion 32-2 to the headphone unit 20.

[0023] The slider plate 35 is a plate-shaped part that is inserted into the slider holding portion 40. An axis L1 in FIG. 1 is an axis that extends parallel to the extension direction of the slider plate 35. The slider plate 35 is configured to be slidable in the extension direction of this axis L1. This changes the position of the slider plate 35 relative to the slider holding portion 40, and adjusts the position of the headphone unit 20.

[0024] In this embodiment, the axis L1 is illustrated as being parallel to the extension direction of the slider plate 35, but the axis L1 does not need to be strictly parallel to the extension direction of the slider plate 35, and the axis L1 may intersect the extension direction of the slider plate 35 at a predetermined angle.

[0025] 4, the slider plate 35 includes a slit 35s, a first extending portion 35-1, and a second extending portion 35-2. The first extending portion 35-1 is provided on one side in the width direction of the slit 35s, which extends in the longitudinal direction of the slider plate 35. The second extending portion 35-2 is provided on the other side in the width direction of the slit 35s.

[0026] A plurality of first engagement portions 35a are formed on the slider plate 35. The first engagement portions 35a are, for example, hemispherical recesses. The plurality of first engagement portions 35a are formed at predetermined intervals along the extension direction of the slider plate 35. Specifically, the plurality of first engagement portions 35a are provided on each of the first extension portion 35-1 and the second extension portion 35-2. In this embodiment, the plurality of first engagement portions 35a are formed at equal intervals, but the plurality of first engagement portions 35a may be formed at intervals that are not equal.

[0027] The first engaging portion 35a, which is a recess, is engaged with a protruding portion 48 (see FIG. 8), which is a second engaging portion provided on the biasing member 45. Details will be described later with reference to FIG.

[0028] (Number and Arrangement of First Engagement Portions 35a) In the configuration of this embodiment in which the first engagement portions 35a are recesses, the first engagement portions 35a are formed by, for example, press working. Press working is a process of forming a predetermined shape by pressing a target member. Therefore, when multiple first engagement portions 35a are formed as shown in FIG. 4, depending on the thickness and material of the slider plate 35, it is expected that the member will stretch slightly in the extension direction of the slider plate 35.

[0029] For example, if the first engaging portion 35a is formed on the first extending portion 35-1 and the second extending portion 35-2 is not formed on the first engaging portion 35a, the first extending portion 35-1 may become longer than the second extending portion 35-2 due to press working. In such a configuration, the slider plate 35 may not be able to move smoothly.

[0030] Therefore, as an example, it is preferable that the first engaging portions 35a (first recesses) of the first extending portion 35-1 and the first engaging portions 35a (second recesses) of the second extending portion 35-2 have the same shape and the same number. With this configuration, the amount of deformation of the first extending portion 35-1 and the amount of deformation of the second extending portion 35-2 due to press working are uniform, so that it is possible to prevent the slider plate 35 from being unable to move smoothly due to deformation of the slider plate 35.

[0031] It should be noted that the present invention is not limited to the case where the first engaging portions 35a of the first extending portion 35-1 and the first engaging portions 35a of the second extending portion 35-2 are the same in number and shape.

[0032] (State when headphones S100 are worn) Fig. 5 is a schematic diagram showing a state in which a user is wearing the headphones, as seen from above. The "front" side in the figure corresponds to the front side of the user's face. When a user wears the headphones S100, the headphone units 20 are pressed against the sides of the user's head. Although this depends on the shape of the user's head, when the headphones S100 are worn, the headphone units 20 are usually tilted such that the distance between the headphone units 20 decreases as they move closer to the front side of the user's face.

[0033] Therefore, in a configuration in which the headphone unit 20 simply rotates around the axis L1, the headphone unit 20 may gradually shift toward the front of the face while the headphone S100 is being worn, or even if the headphone unit 20 does not shift, the fit of the headphone unit 20 may be reduced.

[0034] Therefore, in the configuration of this embodiment, in which the headphone unit 20 rotates around the axis L1, a mechanism is provided that, when the headphone unit 20 rotates around the axis L1, applies a biasing force to the slider plate 35 in the direction opposite to the direction of rotation. This will be described in detail below.

[0035] 1 to 3, the slider holding portion 40 is a component that holds the slider plate 35, which is a part of the slider member 30. The slider holding portion 40 has a housing 41, a plate fixing member 43, and a biasing member 45.

[0036] 2 and 3, the housing 41 has an outer housing 41-1 and an inner housing 41-2. The outer housing 41-1 and the inner housing 41-2 are fixed to each other to form the box-shaped housing 41. A slider plate 35 and a plate fixing member 43 are attached to the outer housing 41-1. A headband 10 is attached to the inner housing 41-2.

[0037] 6 is a diagram schematically illustrating the housing as viewed from above. Housing 41 holds slider plate 35 in a manner that allows slider plate 35 to rotate about axis L1. Specifically, housing 41 is formed with an opening 42 through which slider plate 35 passes. Opening 42 is formed with a shape and size that allows slider plate 35 to rotate a predetermined angle about axis L1 as shown in FIG.

[0038] 6, the axis L1 is located at the center of the cross-sectional shape of the slider plate 35, but this is a schematic representation of the position of the axis L1. In the configuration of this embodiment, to be precise, the axis L1 is located at a position away from the slider plate 35 (details will be described later). In the example of FIG. 6, the opening 42 is formed in the outer housing 41-1, but the opening may also be formed between the outer housing 41-1 and the inner housing 41-2.

[0039] Fig. 7 is a perspective view showing the assembled state of the slider plate, the plate fixing member, and the biasing member. Fig. 8 is a perspective view of the biasing member. Fig. 9 is a perspective view showing the positional relationship between the biasing member and the plate fixing member. Fig. 10 is a cross-sectional view for explaining the function of the biasing member.

[0040] The plate fixing member 43 is disposed inside the housing 41 and is a member through which the slider plate 35 passes. Specifically, as shown in Figures 7 and 9, the plate fixing member 43 has a frame-shaped main body 44a and a protruding portion 44b. The plate fixing member 43 is fixed to the slider plate 35. The plate fixing member 43 has an opening 45h that forms a space in which the biasing member 45 is disposed.

[0041] As shown in Figures 7 and 9, the frame-shaped main body 44a has a flat plate-like shape. A through-hole 44h is formed in the frame-shaped main body 44a, through which the slider plate 35 passes. The region of the frame-shaped main body 44a in which the biasing member 45 is disposed is a gap portion 44g. As shown in Figure 7, the frame-shaped main body 44a has thick portions 44a-1 that press against the ends of the slider plate 35. The slider plate 35 is slidably inserted into the frame-shaped main body 44a.

[0042] 7, 9, and 10, the protruding portion 44b is a portion that protrudes from the frame-shaped main body 44a and has a cross-sectional shape that includes an arc-shaped outline. Specifically, the protruding portion 44b has a shape that is formed by cutting a part of a cylinder along the longitudinal direction of the cylinder.

[0043] As shown in Fig. 10, the protrusion 44b is held by a pedestal 41a inside the housing 41. The pedestal 41a has a cross-sectional shape that includes an arc-shaped recess, and by receiving the protrusion 44b on the pedestal 41a, the plate fixing member 43 and the slider plate 35 are able to rotate around an axis L1. Note that although the axis L1 is depicted at the same position in Figs. 10(a) and 10(b), this embodiment is configured such that the protrusion 44b moves in a rolling manner on the surface of the recess of the pedestal 41a, strictly speaking, the position of the axis that is the center of rotation displaces in accordance with the rotation of the slider plate 35.

[0044] (Using Member 45) As shown in Fig. 10, the urging member 45 is a member that applies a urging force to the slider plate 35 when the slider plate 35 rotates around the axis L1. In this embodiment, the urging member 45 has two functions. The first function is to determine the position of the slider plate 35 in the extension direction of the slider plate 35. The second function is to apply a urging force to the slider plate 35 in the direction around the axis L1, as described above.

[0045] As an example, the biasing member 45 is a single-piece leaf spring formed from a metal sheet. As shown in FIG. 8 , the biasing member 45 has a central portion 46, a first leaf spring portion 47-1, a second leaf spring portion 47-2, a first contact portion 49-1, and a second contact portion 49-2. The first leaf spring portion 47-1 and the second leaf spring portion 47-2 are symmetrical in shape, and therefore, a redundant description will be omitted. The first contact portion 49-1 and the second contact portion 49-2 are also symmetrical in shape, and therefore, a redundant description will be omitted.

[0046] The central portion 46 is a portion that is disposed inside the slit 35s, as shown in Fig. 7. The central portion 46 is fixed to the housing 41 by a fixing screw C (see also Fig. 3).

[0047] 7, the first leaf spring portion 47-1 extends from the central portion 46 toward the first extending portion 35-1. The second leaf spring portion 47-2 extends from the central portion 46 on the side opposite the first extending portion 35-1, i.e., toward the second extending portion 35-2. Specifically, as shown in FIG. 8(a), the first leaf spring portion 47-1 includes a curved portion 47a, a protrusion-forming portion 47b, and an extending portion 47c.

[0048] The curved portion 47a is a curved portion of the leaf spring member, and in this example, is formed with a U-shaped cross section. Specifically, the curved portion 47a is curved so as to protrude in a direction (vertical direction) that intersects with the direction in which the first leaf spring portion 47-1 extends (horizontal direction in FIG. 7). The formation of such curved portion 47a increases the length of the first spring portion, which results in a smaller amount of deformation of the spring per unit length compared to a straight leaf spring, thereby reducing the load on the spring.

[0049] The protrusion-forming portion 47b is located outside the curved portion 47a (farther from the center portion 46). As shown in FIG. 7, the protrusion-forming portion 47b extends in a direction parallel to the slider plate 35, for example.

[0050] A convex portion 48 (see FIG. 8B) is formed on the surface of the protrusion forming portion 47b that faces the slider plate 35. The convex portion 48 is, for example, a hemispherical structural portion that protrudes from the protrusion forming portion 47b. The convex portion 48 fits into the first engaging portion 35a formed on the slider plate 35. Specifically, the convex portion 48 fits into the first engaging portion 35a while being pressed against the first engaging portion 35a by the action of a leaf spring.

[0051] Although the protrusions 48 (first protrusions) have been described using the first plate spring portion 47-1 as an example, similar protrusions 48 (second protrusions) are also formed on the second plate spring portion 47-2.

[0052] The extending portion 47c is located outside the protrusion-forming portion 47b (farther from the central portion 46). The extending portion 47c is, for example, a portion that extends in a planar shape. The extending portion 47c is configured to contact the upper surface of the thick portion 44a-1 in the assembled state shown in FIG.

[0053] The first contact portion 49-1 is provided to extend in a direction perpendicular to the extending direction of the first leaf spring portion 47-1 and the second leaf spring portion 47-2. The second contact portion 49-2 extends in the opposite direction to the first contact portion 49-1. The first contact portion 49-1 and the second contact portion 49-2 each abut against the upper surface of the frame-shaped main body 44a in the assembled state shown in FIG. 7. Furthermore, the upright wall 49a connecting the first contact portion 49-1 and the central portion 46 and the upright wall 49a connecting the second contact portion 49-2 and the central portion 46 abut against or face closely to the inner circumferential surface of the plate fixing member 43 in the assembled state (see FIG. 9). That is, the upright wall 49a, which is a first wall formed on one longitudinal side of the slider plate 35, faces (including abutting and proximate states) a portion of the inner circumferential wall of the opening 45h, and the upright wall 49a, which is a second wall formed on the other longitudinal side, faces (including abutting and proximate states) another portion of the inner circumferential wall of the opening 45h. This prevents the biasing member 45 from moving in the longitudinal direction inside the opening 45h. With this configuration, the biasing member 45 is stably fixed to the plate fixing member 43.

[0054] (Operation when the slider plate 35 is slid) In the initial state of the headphones S100 (a state in which the headphones S100 are not worn by a user), as shown in Figures 7 and 10(a), the convex portions 48 of the first plate spring portion 47-1 fit into the first engagement portions 35a of the slider plate 35, and the convex portions 48 of the second plate spring portion 47-2 fit into the first engagement portions 35a of the slider plate 35. The convex portions 48 fit into the first engagement portions 35a in a state in which they are pressed against the first engagement portions 35a, which are the recesses, by the biasing force of the biasing member 45. This defines the position of the slider plate 35 in the extension direction of the slider plate 35.

[0055] When adjusting the position of the headphone unit 20 (see FIG. 1 ), the user slides the slider member 30 relative to the slider holding portion 40. When the slider member 30 moves, the convex portion 48 disengages from the concave portion of the first engagement portion 35 a and fits into another first engagement portion 35 a. With this configuration, the user can adjust the position of the headphone unit 20.

[0056] (Operation when the headphones S100 are worn by a user) When the headphones S100 are worn, the headphone unit 20 presses against the side of the user's head, causing the slider plate 35 to rotate around the axis L1, as shown in FIG. 10(b), for example. In the example of FIG. 10(b), the slider plate 35 rotates counterclockwise (first direction) around the axis L1 as indicated by the solid arrow. Specifically, the slider plate 35 rotates around the axis L1 together with the plate fixing member 43. The slider plate 35 rotates around the axis in the longitudinal direction of the slider plate 35 as the protrusion 44b moves in a rolling manner in the recess of the base 41a.

[0057] Because the biasing member 45 is fixed to the housing 41 by the fixing screws C, the center portion 46 of the biasing member 45 does not move even if the slider plate 35 and the plate fixing member 43 rotate. Because the second leaf spring portion 47-2 is not fixed to the slider plate 35 or the plate fixing member 43, it does not rotate following the slider plate 35 and the plate fixing member 43.

[0058] Meanwhile, the first plate spring portion 47-1 is elastically deformed so as to rotate counterclockwise due to the rotation of the slider plate 35 and the plate fixing member 43. The elastic deformation of the first plate spring portion 47-1 applies a biasing force in the clockwise direction (a second direction opposite to the first direction) to the slider plate 35 and the plate fixing member 43. As a result, when the slider plate 35 rotates, the slider plate 35 and the plate fixing member 43 are biased in a direction returning to their original positions, as indicated by the dashed arrows. With this configuration, when the headphone unit 20 rotates around the axis L1 as illustrated in FIG. 5, a force is applied to the headphone unit 20 in a direction returning the headphone unit 20 to its original position. Therefore, the headphone unit 20 is less likely to shift out of position, improving the wearability of the headphones S100.

[0059] 10 is defined as the first direction, the second plate spring 47-2 acts to apply a biasing force to the slider plate 35 and the plate fixing member 43 in the direction opposite to the first direction.

[0060] In the present embodiment, a configuration in which the first leaf spring portion 47-1 and the second leaf spring portion 47-2 are provided has been exemplified, but either the first leaf spring portion 47-1 or the second leaf spring portion 47-2 may be omitted. However, the configuration in which the first leaf spring portion 47-1 and the second leaf spring portion 47-2 are provided, as in the present embodiment, has the advantage that a biasing force for returning the slider plate 35 to its original position can be effectively applied to the slider plate 35 regardless of whether the slider plate 35 rotates clockwise or counterclockwise.

[0061] (Effects of headphones S100) As described above, the headphones S100 of this embodiment are provided with a biasing member 45 that is disposed inside the housing 41 and that elastically deforms when the slider plate 35 rotates around the axis L1 to apply a biasing force to the slider plate 35. As a result, a force is applied to the headphone unit 20 in a direction that returns the headphone unit 20 to its original position, which makes it less likely for the headphone unit 20 to shift position and improves the wearability of the headphones S100.

[0062] Furthermore, in the configuration of this embodiment, the biasing member 45 has a protrusion 48 that engages with the first engagement portion 35a of the slider plate 35. This allows the biasing member 45 to also function as a member that determines the longitudinal position of the slider plate 35, thereby simplifying the configuration of the headphones S100 compared to a configuration in which a member that determines the longitudinal position of the slider plate 35 is provided separately from the biasing member 45.

[0063] When the first engagement portion 35a is a recess formed in the slider plate 35, the recess can be easily formed in the plate-shaped slider plate 35 by press processing or the like, which has the advantage that the components of the headphone S100 can be manufactured with good workability.

[0064] (Modification) Fig. 11 is a perspective view showing a modification of the engaging portion of the slider plate. Fig. 12 is a cross-sectional view for explaining the cross-sectional shape of the engaging portion of Fig. 11. In the above embodiment, a configuration was exemplified in which the engaging portion 35a, which is a hemispherical recess, is formed on the slider plate 35 (see Fig. 4), but the engaging portion may have a shape as shown in Figs. 11 and 12.

[0065] 11 is a groove extending in a direction perpendicular to the longitudinal direction of the slider plate 35. A plurality of engagement portions 35b are formed at predetermined intervals along the longitudinal direction of the slider plate 35. Such groove-shaped engagement portions 35b have the advantage that, compared to hemispherical engagement portions 35a, the convex portion 48 (see FIG. 10) of the biasing member 45 can be more easily fitted into the engagement portions 35b.

[0066] 12, the engaging portion 35b has, as an example, a gently curved, arc-shaped recess. This recess is formed so as to be recessed in the thickness direction of the slider plate 35. The depth of the recess is arbitrary, but by forming the engaging portion 35b in this shape, the protrusion 48 of the biasing member 45 that has been fitted into the engaging portion 35b can be smoothly released from the engaging portion 35b, thereby making the movement of the slider plate 35 relative to the slider holding portion 40 smooth.

[0067] The present invention has been described above using embodiments, but the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes are possible within the scope of the gist of the present invention. For example, all or part of the device can be configured by functionally or physically distributing or integrating in any unit. Furthermore, new embodiments resulting from any combination of multiple embodiments are also included in the embodiments of the present invention. The effects of the new embodiments resulting from the combination also have the effects of the original embodiments.

[0068] REFERENCE SIGNS LIST 10 headband 20 headphone unit 22 ear pad 30 slider member 31 unit connection portion 32-1 first extension portion 32-2 second extension portion 35 slider plate 35-1 first extension portion 35-2 second extension portion 35a first engagement portion 35b engagement portion 35s slit 40 slider holding portion 41 housing 41-1 outer housing 41-2 inner housing 41a base 42 opening 43 plate fixing member 44a frame-shaped main body 44a-1 thick portion 44b protrusion portion 44g void portion 44h through hole 45 biasing member 46 central portion 47-1 first leaf spring portion 47-2 second leaf spring portion 47a curved portion 47b protrusion forming portion 47c Extension portion 48: Convex portion (second engagement portion) 49-1: First contact portion 49-2: Second contact portion 49a: Upright wall C: Fixing screw S100: Headphones

Claims

1. Headphones comprising: a headband; a headphone unit; a slider holding portion provided on the headband; a unit connection portion connected to the headphone unit; and a slider member having a slider plate inserted into the slider holding portion, wherein the slider holding portion includes: a housing that holds the slider plate in a manner that allows the slider plate to rotate about an axis extending parallel to the extension direction of the slider plate; and a biasing member that is disposed within the housing and elastically deforms when the slider plate rotates about the axis in a first direction, to apply a biasing force to the slider plate in a second direction opposite to the first direction.

2. The headphones according to claim 1, wherein the slider plate has a plurality of first engagement portions formed at predetermined intervals along the extension direction of the slider plate, and the biasing member has second engagement portions that engage with the first engagement portions to determine the position of the slider plate in the extension direction of the slider plate.

3. The headphones according to claim 2, wherein the first engagement portion is a recess formed in the slider plate, and the second engagement portion is a protrusion formed in the biasing member that fits into the recess when pressed against it by the biasing force of the biasing member.

4. The headphones according to claim 3, wherein the slider plate has a slit formed along the longitudinal direction of the slider plate, a first extending portion provided on one side of the slit in the width direction, and a second extending portion provided on the other side of the slit in the width direction, the first extending portion having a plurality of first recesses as the recess, the second extending portion having a plurality of second recesses as the recess, and the biasing member has a first convex portion that fits into the first recess and a second convex portion that fits into the second recess.

5. The headphones according to claim 4, wherein the first recess and the second recess have the same shape, and the number of the plurality of first recesses is the same as the number of the plurality of second recesses.

6. The headphones according to claim 4 or 5, wherein the biasing member is a leaf spring and has: a central portion fixed to the housing inside the slit; a first leaf spring portion extending from the central portion toward the first extension portion and having the first convex portion formed thereon; and a second leaf spring portion extending from the central portion toward the second extension portion and having the second convex portion formed thereon.

7. The headphones according to claim 6, wherein the first leaf spring portion has a curved portion between the central portion and the first convex portion for lengthening the first leaf spring portion, and the second leaf spring portion has a curved portion between the central portion and the second convex portion for lengthening the second leaf spring portion.

8. Headphones according to claim 1 or 2, wherein the housing has a base with a recess having an arc-shaped cross section, a plate fixing member is fixed to the slider plate, the plate fixing member has a protrusion including an arc-shaped cross section, and the slider plate is configured to rotate around an axis in the longitudinal direction of the slider plate as the protrusion moves in a rolling manner in the recess of the base.

9. The headphones of claim 8, wherein the plate fixing member has an opening that forms a space in which the biasing member is disposed, and the biasing member has a first wall formed on one longitudinal side of the slider plate and a second wall formed on the other longitudinal side of the slider plate, and wherein, when the biasing member is disposed within the opening, the first wall faces a part of the inner circumferential wall of the opening and the second wall faces another part of the inner circumferential wall of the opening, thereby preventing the biasing member from moving in the longitudinal direction inside the opening.

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