Headphones and Earmuffs

Abstract

The present invention provides a headset (1), comprising: a driving unit (11); a baffle member (12) for holding the driving unit; an ear pad (13) mounted on the baffle member; and a shell (14) mounted on the baffle member and accommodating the driving unit. The ear pad has an annular main body (131). The baffle member has an opposing surface (121a) opposed to the main body. When the direction in which the main body is arranged relative to the baffle member is a first direction, and the direction in which the shell is arranged relative to the baffle member is a second direction, at least a portion of the opposing surface is an inclined surface that is inclined toward the second direction as it moves from the outer edge of the opposing surface toward the inner edge of the opposing surface, or a curved surface that is bent toward the second direction as it moves from the outer edge of the opposing surface toward the inner edge. The headset (1) can easily improve the close contact between the ear pad and the side of the head at low cost.

Description

Technical Field

[0001] The invention relates to a headset and an earmuff. Background Art

[0002] The earmuff-type headphone among the headphone has a sound generating unit that covers the user's ears when worn by the user. The sound generating unit has a driving unit, a baffle member, and an ear pad. The driving unit outputs sound waves according to an electrical signal from a sound source. The baffle member holds the driving unit.

[0003] When the headset is worn by the user, the ear pad is pressed against the side of the head around the auricle of the user. At this time, the ear pad fits against the side of the head and acts as a buffer between the side of the head and the baffle member. As a result, the ear pad forms an acoustic space (enclosed space) between the user's ear and the driver unit that is isolated from the outside.

[0004] Since the shape of the side of the head varies from person to person, it is easy for a gap to form between the side of the head and the ear pad. If a gap is formed between the ear pad and the side of the head, the sound waves from the drive unit will leak out from the gap to the outside, causing the low-frequency sound pressure of the headset to drop. In addition, the sound insulation of the headset will also decrease, and noise from the outside will enter the acoustic space through the gap. As mentioned above, the above-mentioned acoustic space is an important factor that affects the acoustic characteristics of the headset. Therefore, when the headset is worn by the user, the ear pad must fit tightly against the side of the head to avoid the above-mentioned gap (to maintain the airtightness of the acoustic space).

[0005] Generally speaking, in order to make the ear pads fit tightly against the side of the head, elastic materials such as polyurethane foam that are easy to deform are used in the ear pads. If an elastic material with a small elastic modulus is used, the ear pads will deform to follow the shape of the side of the head and fit tightly against the side of the head. As a result, the airtightness of the acoustic space can be maintained and the wearability (wearing feel) of the headphones can be improved. However, the ear pads made of elastic materials with a small elastic modulus will be greatly flattened, which will cause the volume of the acoustic space to become smaller. In addition, when external force is applied to the ear pads, the ear pads will deform, which can easily cause the headphones to shift. When an elastic material with a large elastic modulus is used, the ear pads are not easily flattened, but they cannot fully follow the shape of the side of the head (the ear pads are difficult to fit tightly against the side of the head). As a result, although the volume of the acoustic space can be ensured to be larger, the airtightness of the acoustic space or the wearability of the headphones will be reduced.

[0006] In order to solve the above-mentioned problem, a technique of using a plurality of materials having different elastic moduli or hardnesses for ear pads has been proposed (for example, refer to Patent Documents 1 and 2).

[0007] According to the technology disclosed in Patent Document 1, the ear pad has two annular elastic members (a first elastic member and a second elastic member) with different elastic moduli. The elastic modulus of the first elastic member is greater than that of the second elastic member. The second elastic member is stacked on the first elastic member so that it is arranged close to the side of the head when the headphone is worn by the user. At least a portion of the inner diameter of the second elastic member is configured to be smaller than the inner diameter of the first elastic member. Due to the difference in the inner diameter, a space (allowable deformation space) that allows the second elastic member to deform is formed on the inner circumference of the ear pad. If the first elastic member and the second elastic member are wrapped with a cover, the second elastic member will deform in a manner of tilting toward the allowable deformation space (inner circumference). As a result, an inclined surface inclined toward the inner circumference will be formed on the surface where the ear pad meets the side of the head.

[0008] According to the technology disclosed in Patent Document 1, when the headphone is worn by the user, the second elastic member deforms toward the inner circumference side, and the ear pad is closely attached to the side of the head. At this time, the first elastic member does not deform and maintains a predetermined thickness. As a result, the airtightness of the acoustic space and the volume of the acoustic space can be fully ensured.

[0009] According to the technology disclosed in Patent Document 2, the ear pad has three annular elastic members (outer ring member, middle ring member, inner ring member) arranged in concentric circles. The middle ring member is arranged between the outer ring member and the inner ring member. The hardness of the middle ring member is configured to be lower than the hardness of each of the outer ring member and the inner ring member. If these elastic members are wrapped with a cover, the surface where the ear pad contacts the side of the head will become flat due to the tension of the cover and the hardness difference of each elastic member.

[0010] According to the technology disclosed in Patent Document 2, when the headset is worn by the user, the outer ring member and the inner ring member will bend toward the middle ring member in a manner that follows the shape of the side of the head, and the ear pad will fit closely against the side of the head. At this time, each elastic member will not deform significantly in the thickness direction. As a result, the airtightness of the acoustic space and the volume of the acoustic space can be fully ensured.

[0011] As described above, the technology disclosed in Patent Documents 1 and 2 is to use multiple materials with different elastic moduli (hardness) for ear pads to improve the close fit between the ear pads and the side of the head. As a result, not only the volume of the acoustic space can be ensured, but also the airtightness of the acoustic space and the wearability of the headphone can be improved. However, in the above technology, in order to determine the structure of each elastic member, it is necessary to calculate the deformation of each elastic member according to each type of headphone, which makes the design of the ear pad complicated. In addition, since the ear pad requires multiple elastic members and is processed, the structure of the ear pad becomes complicated, thereby increasing the cost.

[0012] Prior art literature

[0013] Patent Literature:

[0014] Patent Document 1: Japanese Patent Application Publication No. 2016-225809

[0015] Patent Document 2: Japanese Patent Application Publication No. 2009-105841 Summary of the invention

[0016] An object of the present invention is to provide a headphone that can easily improve the close contact between an ear pad and the side of the head at low cost.

[0017] The headphones of the present invention include: a driving unit; a baffle member for holding the driving unit; an ear pad mounted on the baffle member; and a housing mounted on the baffle member and accommodating the driving unit. The ear pad includes an annular main body. The baffle member includes an opposing surface opposed to the main body. When the direction in which the main body is arranged relative to the baffle member is a first direction, and the direction in which the housing is arranged relative to the baffle member is a second direction, at least a portion of the opposing surface is an inclined surface that is inclined toward the second direction as it moves from the outer edge of the opposing surface toward the inner edge of the opposing surface, or a curved surface that is curved toward the second direction as it moves from the outer edge of the opposing surface toward the inner edge of the opposing surface.

[0018] Effects of the Invention

[0019] According to the present invention, the close contact between the ear pad and the side of the head can be easily improved at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a perspective view showing an embodiment of the headphone according to the present invention.

[0021] Figure 2 yes Figure 1 A side view of the left speaker unit of the headphone.

[0022] Figure 3 yes Figure 2 A cross-sectional view of the left sound unit taken along line AA.

[0023] Figure 4 yes Figure 2 A cross-sectional view of the left sound unit taken along line BB.

[0024] Figure 5 yes Figure 2 An exploded perspective view of the left speaker unit.

[0025] Figure 6 yes Figure 2 A side view of the baffle assembly of the left sound unit.

[0026] Figure 7 yes Figure 6 C-direction view of the baffle component.

[0027] Figure 8 yes Figure 6 A cross-sectional view of the baffle component taken along line DD.

[0028] Fig. 9 yes Figure 6 A cross-sectional view of the baffle component taken along line EE.

[0029] Fig.10 It is shown Figure 1 A cross-sectional view of a headphone before it is worn by a user.

[0030] Fig.11 It is shown Fig.10 A cross-sectional view of the headphone after being worn by a user.

[0031] Fig.12 It shows the observation from another angle Fig.11 An enlarged cross-sectional view of the state.

[0032] Description of Reference Numerals

[0033] 1. Headphones

[0034] 11: Drive unit

[0035] 12: Baffle components

[0036] 121: First flange portion (flange portion)

[0037] 121a: Surface 1 (opposing surface)

[0038] 121b: Side 2

[0039] 124: Maintenance Department

[0040] 125: Inclined part

[0041] 125h: Through hole

[0042] 13: Ear pads

[0043] 131: Main body

[0044] 133: Net (net-like member)

[0045] 14: Shell

[0046] R1: Radius of curvature DETAILED DESCRIPTION

[0047] Hereinafter, embodiments of the headphones according to the present invention will be described with reference to the drawings.

[0048] Headphones

[0049] The composition of headphones

[0050] Figure 1 It is a perspective view showing an embodiment of the headphone according to the present invention.

[0051] The headphone 1 outputs sound waves corresponding to audio signals from a sound source (not shown) such as a portable music player when worn on the head of a user of the headphone 1. The headphone 1 includes a left sound unit 10, a right sound unit 20, and a connecting member 30.

[0052] In the following description, the up, down, left, right, front, and back directions of the headset 1 are the same as the up, down, left, right, front, and back directions of the user when the headset 1 is worn by the user (hereinafter referred to as the "wearing state"). That is, for example, the left sound unit 10 is worn on the side of the user's head HD (refer to Fig.10 . The same below) in the user's left ear LE (refer to Fig.10 . The same below), and the right sound unit 20 is worn around the right ear (not shown. The same below).

[0053] In the following description, "the first direction" refers to the direction in which the side head HD is located relative to the left sound unit 10 and the right sound unit 20 in the wearing state. That is, the first direction of the left sound unit 10 is the right direction of the user, and the first direction of the right sound unit 20 is the left direction of the user.

[0054] In the following description, the "second direction" refers to the direction opposite to the first direction. That is, the second direction of the left sound unit 10 is the left direction of the user, and the second direction of the right sound unit 20 is the right direction of the user.

[0055] The left sound emitting unit 10 is worn around the left ear LE in the side head HD, and outputs a sound wave corresponding to an audio signal from a sound source.

[0056] The right sound generating unit 20 is worn around the right ear of the side head HD, and outputs sound waves corresponding to the audio signal from the sound source.

[0057] The connecting member 30 is connected to the left sound unit 10 and the right sound unit 20, respectively, and supports the left sound unit 10 and the right sound unit 20. In the wearing state, the connecting member 30 applies lateral pressure toward the first direction to the left and right sound units 10 and 20, and fixes the left and right sound units 10 and 20 to the side of the head HD.

[0058] The structure of the left sound unit

[0059] Figure 2 This is a side view of the left sound unit 10 as viewed from the left of the left sound unit 10 .

[0060] Figure 3 The left sound unit 10 is along Figure 2 Cross-sectional view taken along line AA.

[0061] Figure 4 The left sound unit 10 is along Figure 2 Cross-sectional view taken along line BB.

[0062] Figure 5 It is an exploded perspective view of the left sound unit 10 .

[0063] The left sound unit 10 includes a driver unit 11 , a baffle member 12 , an ear pad 13 , and a housing 14 .

[0064] The driver unit 11 converts the audio signal into a sound wave and outputs the sound wave. The driver unit 11 is a dynamic type driver unit including a diaphragm 111 , a voice coil 112 , a magnetic circuit 113 , a housing 114 , and a protection plate 115 .

[0065] The barrier member 12 holds the driving unit 11. The barrier member 12 partitions the first space S1 and the second space S2. The detailed structure of the barrier member 12 will be described later.

[0066] The “first space S1 ” is an acoustic space surrounded by the driver unit 11 , the baffle member 12 , the ear pad 13 , and the temporal region HD in the wearing state.

[0067] The “second space S2” is an acoustic space surrounded by the driver unit 11, the baffle member 12, and the housing 14. The volume of the first space S1 and the volume of the second space S2 affect the vibration of the diaphragm 111, that is, affect the characteristics of the headphone 1.

[0068] The ear pad 13 functions as a buffer between the baffle member 12 and the temporal part HD. The ear pad 13 includes a main body 131 , a folded edge 132 , and a mesh portion 133 .

[0069] The main body 131 is a buffer between the baffle member 12 and the temporal head HD. The main body 131 is annular (donut-shaped). The main body 131 is formed by the connecting member 30 (see Figure 1 ) is deformed by the lateral pressure and closely adheres to the side head HD. In order to increase the contact area between the main body 131 and the side head HD in the wearing state, the width of the portion of the main body 131 arranged in front and behind the ear (the front and rear portions of the main body 131) is made larger than the width of the portion arranged above and below the ear (the upper and lower portions of the main body 131).

[0070] The main body 131 is formed by a cover member covering an elastic member, and has elasticity. The cover member is made of a material with a good touch, such as leather. The elastic member is made of an elastic material, such as polyurethane foam. A portion of the cover member is extended from the left surface ( Figure 3 , 4 The outer peripheral edge of the surface (on the right side of the paper) extends to the inner peripheral side to form a folded edge 132. The folded edge 132 supports the main body 131 on the baffle member 12.

[0071] The net 133 prevents sweat and foreign matter from entering the drive unit 11 from the outside. The net 133 is made of, for example, chemical fiber with good air permeability. The net 133 is attached to the left surface of the main body 131 with a predetermined tension. The net 133 covers the opening on the second direction side of the main body 131. The net 133 is a mesh member in the present invention.

[0072] The folded edge 132 is attached to a first flange portion 121 of the baffle member 12 described later. As a result, the main body portion 131 and the net portion 133 are arranged on the first direction side with respect to the baffle member 12 .

[0073] The housing 14 accommodates the drive unit 11, and forms a second space S2 on the second direction side of the drive unit 11. The housing 14 is cup-shaped, and has, for example, a gently curved bottom surface 14a. The housing 14 is made of, for example, a synthetic resin such as ABS (acrylonitrile-butadiene-styrene copolymer). The bottom surface 14a is a covering surface in the present invention.

[0074] It should be noted that the housing may be made of wood or metal, or may be composed of a composite member such as a synthetic resin member and a wooden member.

[0075] ·Composition of baffle components

[0076] Figure 6 It is a side view of the baffle member 12 as seen from the right side of the baffle member 12 .

[0077] Figure 7 The baffle member 12 Figure 6 C-direction view.

[0078] Figure 8 The edge of the baffle member 12 Figure 6 Cross-sectional view taken along line DD.

[0079] Fig. 9 The edge of the baffle member 12 Figure 6 A cross-sectional view taken along line EE.

[0080] The baffle member 12 is circular in side view. The baffle member 12 is made of a synthetic resin such as ABS. The baffle member 12 includes a first flange portion 121, a side portion 122, a second flange portion 123, a retaining portion 124, and an inclined portion 125. The first flange portion 121, the side portion 122, the second flange portion 123, the retaining portion 124, and the inclined portion 125 are respectively formed as one body.

[0081] The first flange 121 holds the ear pad 13 (see Figure 3 , 4 ). The first flange portion 121 is in the shape of an annular plate. The first flange portion 121 is a flange portion in the present invention. The first flange portion 121 is arranged at the outer edge of the baffle member 12 in a side view. The first flange portion 121 includes a first surface 121a and a second surface 121b.

[0082] The first surface 121a is a surface on the first direction side of the first flange portion 121. The first surface 121a is an opposing surface in the present invention. The first surface 121a is a curved surface that curves toward the second direction side as it moves from the outer edge to the inner edge over the entire circumference of the first surface 121a. In other words, the first surface 121a is in a shallow mortar shape.

[0083] In the present embodiment, the “curved surface that curves toward the second direction from the outer edge toward the inner edge” refers to a curved surface whose center of curvature O1 is located toward the first direction and whose outer edge in the left-right direction is located toward the first direction than the inner edge.

[0084] The width of the first surface 121 a (the distance between the outer edge and the inner edge) is uniform over the entire circumference of the first surface 121 a .

[0085] In this embodiment, if Figure 8 As shown in FIG. 1 , the first surface 121a is configured as a curved surface with a curvature radius R1 centered at a curvature center O1. The curvature center O1 is arranged on the first direction side relative to the first surface 121a and on the central axis X1 of the baffle member 12. The so-called "central axis X1" refers to a line passing through the center of the baffle member 12 and parallel to the left and right directions when viewed from the side. That is, the curvature radius R1 of the curved surface of the first surface 121a is uniform over the entire circumference of the first surface 121a.

[0086] The curvature radius R1 is set according to the average shape of the part around the human ear. That is, for example, the curvature radius R1 is set to a value smaller than the average value of the average curvature radius of the part around the human ear.

[0087] The second surface 121b is a surface on the second direction side of the first flange portion 121. The second surface 121b is a surface perpendicular to the central axis X1 of the baffle member 12. Therefore, the first surface 121a is a surface curved with respect to the second surface 121b.

[0088] The side surface portion 122 is disposed between the first flange portion 121 and the second flange portion 123 to form a folding edge 132 (see Figure 3 , 4 The side surface portion 122 is annular. The side surface portion 122 is arranged on the left side of the first flange portion 121.

[0089] The second flange portion 123 is in the shape of an annular plate. The second flange portion 123 is parallel to the second surface 121 b. The second flange portion 123 is arranged on the left side of the side surface portion 122 .

[0090] The holding portion 124 holds the drive unit 11 (see Figure 3 , 4 The holding portion 124 is cylindrical. The holding portion 124 has an opening 124h in the center, which has a smaller diameter than the drive unit 11. The holding portion 124 is arranged at a position closer to the center of the baffle member 12 than the first flange portion 121 when viewed from the side. The holding portion 124 is inclined relative to the second surface 121b in a manner along the auricle of the user when worn. That is, the central axis X2 of the holding portion 124 is inclined obliquely forward relative to the central axis X1 of the baffle member 12. Fig. 9 As shown, in the left-right direction, the rear portion of the holding portion 124 is arranged on the left direction (second direction) side of the second flange portion 123, and the front portion of the holding portion 124 is arranged on the right direction (first direction) side slightly than the second flange portion 123. That is, the rear portion of the holding portion 124 is most protruding from the second flange portion 123 to the second direction side.

[0091] The inclined portion 125 is disposed between the first flange portion 121 and the holding portion 124 in a side view. The inclined portion 125 has an annular belt shape that is inclined with respect to the second surface 121b.

[0092] The front portion of the inclined portion 125 is inclined toward the first direction relative to the second surface 121b. The portion other than the front portion of the inclined portion 125 is inclined toward the second direction. That is, the inclined direction of the inclined portion 125 is at a certain position (change point P: refer to Figure 6 The inclination angle of the inclined portion 125 relative to the second surface 121b increases from the change point P toward the rear, and slightly increases from the change point P toward the front. That is, the inclination angle changes continuously in the circumferential direction of the inclined portion 125, reaches a maximum at the rear, and reaches a minimum at the change point P.

[0093] The width of the inclined portion 125 (the distance between the outer edge and the inner edge) changes according to the inclination angle. That is, the width of the inclined portion 125 changes continuously in the circumferential direction, reaches a maximum at the rear portion, and reaches a minimum at the change point P. In other words, the width of the inclined portion 125 reaches a maximum at the rear portion and reaches a minimum near the front portion. As described above, the rear portion of the retaining portion 124 protrudes most from the second flange portion 123 to the second direction side. Therefore, the rear portion of the inclined portion 125 also protrudes most from the second flange portion 123 to the second direction side.

[0094] The inclined portion 125 has a plurality of (16 in this embodiment) through holes 125h. Figure 4 As shown in FIG. 1 , the through holes 125 h connect the first space S1 and the second space S2 . The through holes 125 h are arranged at equal angular intervals in the inclined portion 125 along the circumferential direction of the inclined portion 125 .

[0095] The opening area of ​​each through hole 125h increases as the width of the inclined portion 125 increases. As described above, the width of the inclined portion 125 changes according to the inclination angle of the inclined portion 125, reaching the maximum at the rear and the minimum near the front. Therefore, the opening area is set to increase as the inclination angle of the inclined portion 125 increases. Therefore, the opening area of ​​the through hole 125h at the rear is larger than the opening area of ​​the through hole 125h at the front.

[0096] On the other hand, the shapes of the through holes 125h are set to be substantially the same when projected from the first direction (side view). Here, “substantially the same shape” means that the shapes are the same as long as there is no structure (e.g., a protrusion, a cable socket, etc.) that hinders the formation of the through hole 125h on the inclined portion 125.

[0097] Back to Figure 3-Figure 5 .

[0098] The drive unit 11 is mounted on the holding portion 124 of the baffle member 12. As a result, the drive unit 11 is arranged on the second direction side relative to the baffle member 12. As described above, the holding portion 124 of the baffle member 12 is inclined relative to the second surface 121b of the baffle member 12. Therefore, the drive unit 11 is also held by the holding portion 124 in a state of being inclined relative to the second surface 121b.

[0099] The folded edge 132 of the ear pad 13 is inserted into the gap of the baffle member 12 so as to wrap the first flange portion 121 of the baffle member 12. As a result, the ear pad 13 is attached to the baffle member 12. The main body 131 and the net portion 133 of the ear pad 13 are arranged on the first direction side relative to the baffle member 12.

[0100] The net portion 133 is disposed between the baffle member 12 and the main body portion 131 , and covers the right side of the baffle member 12 .

[0101] The first surface 121a of the first flange portion 121 is opposed to the main body 131 (via the mesh portion 133). When the headphone 1 is not worn by the user (unworn state), the outer edge of the first surface 121a contacts the ear pad 13 (the mesh portion 133 or the main body 131). At this time, the inner edge of the main body 131 is lifted toward the first direction side by the tension of the folded edge 132, with the outer edge of the first surface 121a as a fulcrum. Therefore, the inner edge of the first surface 121a is separated from (not contacted with) the ear pad 13 (the main body 131 or the mesh portion 133). That is, in the unworn state, the distance between the main body 131 and the first surface 121a increases as it moves from the outer edge to the inner edge of the first surface 121a. That is, in the unworn state, the distance between the main body 131 and the inner edge is larger than the distance between the main body 131 and the outer edge.

[0102] As described above, the width of the front and rear portions of the main body 131 is larger than the width of the upper and lower portions. Therefore, the front and rear portions of the main body 131 extend to the right of the inclined portion 125 of the baffle member 12. That is, the upper and lower portions of the main body 131 are respectively opposed to the first surface 121a (through the net portion 133). The front and rear portions of the main body 131 are respectively opposed to the first surface 121a and the inclined portion 125 (through the net portion 133).

[0103] The housing 14 is mounted on the second flange portion 123 of the baffle member 12 by screws (not shown). The housing 14 is arranged on the second direction side relative to the baffle member 12. The housing 14 covers the second direction side of each of the drive unit 11 and the baffle member 12. That is, the bottom surface 14a of the housing 14 covers the second direction side of the drive unit 11. As a result, the housing 14, the drive unit 11, and the baffle member 12 together form the second space S2.

[0104] As described above, the rear portion of the retaining portion 124 protrudes most from the second flange portion 123 toward the second direction side. Therefore, the rear portion of the driver unit 11 is closest to the bottom surface 14a of the housing 14. As a result, when the diaphragm 111 vibrates, the rear portion of the diaphragm 111 may be affected by the internal pressure in the second space S2. "Internal pressure" refers to the pressure (reaction force) received by the air in the second space S2 when the diaphragm 111 vibrates and squeezes air into the second space S2. Here, the vibration speed of the diaphragm 111 is slower at lower frequencies. When the diaphragm 111 vibrates at low frequencies, the diaphragm 111 is displaced while slowly moving the air. That is, the lower the frequency, the more air the diaphragm 111 squeezes into the second space S2. Therefore, the lower the frequency, the more the vibration of the diaphragm 111 will be braked by the internal pressure. As a result, when the distance between the diaphragm 111 and the bottom surface 14 a is short, the vibration of the diaphragm 111 is suppressed, especially at low frequencies.

[0105] Here, the distance between the bottom surface 14a and the through hole 125h becomes shorter as it goes from the front to the rear of the inclined portion 125. The opening area of ​​the through hole 125h at the rear of the inclined portion 125 is larger than the opening area of ​​the through hole 125h at the front. Therefore, the air at the rear of the second space S2 easily moves (flows) to the first space S1. As a result, the influence of the aforementioned internal pressure is eliminated. Therefore, the diaphragm 111 will not be affected by the aforementioned internal pressure and can vibrate uniformly in the circumferential direction of the diaphragm 111.

[0106] The structure of the right sound unit

[0107] Back to Figure 1 .

[0108] The right sound unit 20 includes a driver unit (not shown), a baffle member 22, an ear pad 23, and a housing 24. The configuration of the right sound unit 20 is the same as that of the left sound unit 10. Therefore, a specific description of the right sound unit 20 is omitted.

[0109] Deformation of ear pads

[0110] Next, the deformation of the ear pad 13 when the headphone 1 is worn on the head of the user will be described.

[0111] Fig.10 The left sound unit 10 is located at the edge of the headset 1 before it is worn on the user's head. Figure 2 Cross-sectional view taken along line AA.

[0112] For the sake of convenience, the figure schematically shows the temporal head HD and the left ear LE. The figure shows a state where the main body 131 is in contact with the temporal head HD. The figure shows that, for example, the user supports the left sound unit 10 with his hand without using the self-connecting member 30 (see Figure 1 The state in which the lateral pressure (hereinafter the same) acts on the baffle member 12 and the main body 131.

[0113] like Fig.10 As shown in FIG. 1 , before the headphone 1 is worn by the user (i.e., not worn), the baffle member 12 does not press the ear pad 13 (main body 131) toward the side of the head HD. Therefore, the inner edge of the main body 131 and the net 133 are separated from the first surface 121a of the baffle member 12.

[0114] When the side pressure from the connecting member 30 acts on the baffle member 12, the outer edge of the first surface 121a presses the net portion 133 and the main body 131 toward the temporal head HD. At this time, the main body 131 tilts toward the first surface 121a side (the second direction side) with the outer edge of the first surface 121a as a fulcrum. As described above, the curvature radius R1 (refer to Figure 8 ) is set. Therefore, when the main body 131 tilts toward the first surface 121a, the right surface 131a (the surface on the side of the side head HD) of the main body 131 forms a concave surface (curved surface) in a manner along the shape of the side head HD. As a result, most of the right surface 131a is in contact with the side head HD. At this time, the first space S1 is formed by the drive unit 11, the baffle member 12, the ear pad 13, and the side head HD.

[0115] Fig.11 is the edge of the left sound unit 10 in the wearing state Figure 2 For ease of explanation, the figure schematically shows the side of the user's head HD and left ear LE.

[0116] The first surface 121a presses the main body 131 toward the temporal region HD via the net 133. At this time, the main body 131 is deformed approximately equally toward the inner edge and the outer edge along the shapes of the temporal region HD and the first surface 121a. As a result, the main body 131 is deformed along the shape of the temporal region HD and is in close contact with the temporal region HD.

[0117] The main body 131 tilts toward the first surface 121a, and as a result, the net 133 abuts against the first surface 121a in the order from the outer edge to the inner edge of the first surface 121a. At this time, the net 133 is slightly stretched by the main body 131. As a result, the tension acting on the net 133 increases slightly.

[0118] As described above, when most of the right surface 131a of the main body 131 is in contact with the side head HD, the main body 131 is deformed along the side head HD and is in close contact with the side head HD. Therefore, the main body 131 is pressed toward the side head HD with uniform pressure over the entire circumference. As a result, the close contact between the ear pad 13 and the side head HD is improved, and the wearability of the headset 1 for the user is also improved. In addition, the first space S1 can be separated from the space outside the headset 1, thereby ensuring the airtightness of the first space S1.

[0119] Fig.12 is the edge of the left sound unit 10 in the wearing state Figure 2 This figure shows an enlarged cross-sectional view of the front part of the left sound unit 10.

[0120] As described above, the front portion of the ear pad 13 faces the inclined portion 125. The front portion of the inclined portion 125 is inclined toward the first direction, and the inclination angle of the front portion is small. Therefore, in the wearing state, the front portion of the main body 131 tilts and deforms toward the second direction so as to cover the front portion of the inclined portion 125. At this time, the net portion 133 is sandwiched between the main body 131, the first surface 121a, and the front portion of the inclined portion 125. As described above, the tension of the net portion 133 is slightly increased. Therefore, the net portion 133 hinders the deformation of the main body 131 toward the inclined portion 125. As a result, in the wearing state, a gap S11 is formed between the front portion of the inclined portion 125 and the net portion 133. That is, the through hole 125h arranged at the front portion of the inclined portion 125 is not blocked by the main body 131. The gap S11 increases from the front portion to the rear portion of the inclined portion 125 in the circumferential direction of the inclined portion 125, and constitutes a part of the first space S1. That is, the gap S11 is formed over the entire circumference of the inclined portion 125. As a result, ventilation between the first space S1 and the second space S2 can be ensured over the entire circumference of the inclined portion 125 when the wearer is wearing the wearer.

[0121] As described above, the through holes 125h are arranged at equal angles, and the shapes of the through holes 125h are substantially the same when viewed from the side. That is, the through holes 125h are evenly arranged to surround the driver unit 11. Therefore, the ventilation between the first space S1 and the second space S2 is substantially even around the driver unit 11. As a result, the diaphragm 111 can vibrate substantially evenly in the circumferential direction of the diaphragm 111.

[0122] ·Summarize·

[0123] According to the embodiment described above, the first surface 121a of the baffle member 12 is configured as a curved surface that curves toward the second direction side as it goes from the outer edge to the inner edge. Therefore, when the user wears the headphone 1, the main body 131 of the ear pad 13 tilts toward the second direction side. As a result, the right surface of the main body 131 can be in close contact with the side of the head HD of the user. In this way, by improving the shape of the first surface 121a of the baffle member 12 of the headphone 1, the close contact of the ear pad 13 to the side of the head HD is improved. That is, it is not necessary to make special improvements to the ear pad 13 of the headphone 1. Therefore, the headphone 1 can reduce the cost required for the ear pad 13 compared with the existing headphone using the ear pad composed of a combination of multiple materials (hereinafter referred to as "existing headphone"). That is, the headphone 1 can easily improve the close contact between the ear pad 13 and the side of the head HD at low cost compared with the existing headphone.

[0124] Furthermore, as described above, when the user wears the headphones 1, the main body 131 tilts toward the first surface 121a, so that most of the right surface 131a of the main body 131 is in close contact with the side of the head HD. Therefore, the close contact between the ear pad 13 and the side of the head HD can be ensured without excessively deforming the main body 131 of the headphones 1. As a result, the volume of the first space S1 can be ensured without making the ear pad 13 of the headphones 1 too thick.

[0125] Furthermore, according to the above-described embodiment, the curvature radius R1 of the first surface 121a is set according to the average shape of the part around the human ear. Therefore, when the main body 131 is tilted to the second direction, the right surface 131a of the main body 131 is bent in a manner along the shape of the temporal head HD and abuts against the temporal head HD. As a result, the headphone 1 can easily improve the close contact between the ear pad 13 and the temporal head HD.

[0126] Furthermore, according to the above-described embodiment, in the unworn state, the outer edge of the first surface 121a contacts the ear pad 13 (the main body 131 or the mesh 133), and the inner edge of the first surface 121a does not contact the ear pad 13. That is, the distance between the main body 131 and the inner edge is greater than the distance between the main body 131 and the outer edge. Therefore, when the user wears the headphone 1, the main body 131 is easily tilted toward the first surface 121a side (the second direction side).

[0127] Furthermore, according to the above-described embodiment, the second surface 121b of the first flange portion 121 is a surface perpendicular to the central axis X1 of the baffle member 12. The first surface 121a is a curved surface that is curved relative to the second surface 121b. Therefore, the headphone 1 can easily improve the close contact between the ear pad 13 and the side head HD while reliably holding the main body 131 by the second surface 121b and the folded edge 132.

[0128] Furthermore, according to the embodiment described above, the inclined portion 125 is inclined relative to the second surface 121b, and its inclination angle changes continuously in the circumferential direction of the inclined portion 125. That is, the inclined portion 125 has no bends or steps on the entire circumference. Therefore, the sound waves emitted to the first space S1 and the second space S2, respectively, will not be diffusely reflected on the surface of the inclined portion 125. As a result, unnecessary resonance points are less likely to be generated in the frequency characteristics of the first space S1 and the second space S2. In addition, since a part of the first space S1 is also formed in the baffle member 12 by the inclined portion 125, the volume of the first space S1 can be fully ensured.

[0129] Furthermore, according to the embodiment described above, the holding portion 124 is inclined relative to the second surface 121b in a manner along the auricle of the user. A portion (front portion) of the inclined portion 125 is inclined toward the first direction side relative to the second surface 121b. As a result, the headphone 1 can suppress the increase in thickness in the left-right direction and have a driving unit 11 with a diameter as large as possible relative to the baffle member 12. In addition, since the inclined portion 125 is formed corresponding to the inclination of the holding portion 124, the volume of the first space S1 can be fully ensured.

[0130] Furthermore, according to the embodiment described above, the inclined portion 125 has a plurality of through holes 125h arranged along the circumferential direction of the inclined portion 125. That is, the through holes 125h are arranged on the inclined portion 125 as an inclined surface. In other words, the through holes 125h are three-dimensionally arranged on the baffle member 12. As a result, even if the headphone 1 is equipped with a driver unit 11 having a larger diameter than the baffle member 12, ventilation between the first space S1 and the second space S2 can be ensured.

[0131] Furthermore, according to the above-described embodiment, the shapes of the through holes 125h are substantially the same when projected from the first direction. Therefore, the ventilation between the first space S1 and the second space S2 is substantially uniform around the entire periphery of the driver unit 11. As a result, the diaphragm 111 can vibrate substantially uniformly in the circumferential direction of the diaphragm 111.

[0132] Furthermore, according to the above-described embodiment, the opening area of ​​each through hole 125h increases as the inclination angle of the inclined portion 125 increases. The distance between the bottom surface 14a of the housing 14 and the through hole 125h decreases as the inclination angle of the inclined portion 125 increases. As a result, the influence of the internal pressure that may be generated by tilting the rear portion of the driver unit 11 toward the second direction side on the diaphragm 111 is eliminated at the rear portion of the second space S2. Therefore, the diaphragm 111 is not affected by the internal pressure and can vibrate approximately uniformly in the circumferential direction of the diaphragm 111.

[0133] Furthermore, according to the embodiment described above, in the wearing state, a gap S11 is formed between the net portion 133 and the inclined portion 125. The gap S11 is formed around the entire circumference of the inclined portion 125. Therefore, the through hole 125h is not blocked by the main body 131. The gap S11 becomes larger from the front to the rear of the inclined portion 125, and constitutes a part of the first space S1. As a result, in the wearing state, ventilation between the first space S1 and the second space S2 can be ensured around the entire circumference of the inclined portion 125.

[0134] Moreover, according to the embodiment described above, the radius of curvature R1 of the first surface 121a is the same over the entire circumference. As an alternative, the radius of curvature of a portion of the first surface in the first surface may be different from the radius of curvature of another portion of the first surface. That is, the radius of curvature of the first surface may also be different in each portion in accordance with the shape of the temporal head. Normally, in the temporal head around the ear, the shape behind or below the ear is more curved (bent) than the shape in front of or above the ear. Therefore, for example, the radius of curvature of the opposing surface arranged behind and below the ear may be smaller than the radius of curvature of the opposing surface arranged in front of and above the ear. In this way, by making the first surface have multiple radii of curvature along the shape of the temporal head, the close fit between the ear pad and the temporal head is further improved.

[0135] In addition, according to the above-described embodiment, a curved surface is arranged on the entire circumference of the first surface 121a. As an alternative, the first surface may also have a non-curved flat surface in part. In other words, at least a portion of the first surface may be curved toward the second direction and another portion may be flat.

[0136] Moreover, according to the embodiment described above, the first surface 121a is a curved surface that bends toward the second direction side as it goes from the outer edge to the inner edge. As an alternative, the first surface may also be an inclined surface that tilts toward the second direction side as it goes from the outer edge to the inner edge of the first surface. In this case, the inclined surface may be arranged on the entire circumference of the first surface, or may be arranged on a portion of the first surface (a portion may be a non-inclined plane). In this structure, the "inclination angle of the first surface" refers to, for example, the inclination angle of the first surface relative to the second direction or the inclination angle of the first surface relative to the second surface. The inclination angle of the first surface is set according to the shape of the part around the ear of the user, just like the radius of curvature of the first surface. Therefore, the inclination angle of the first surface may also be uniform over the entire circumference of the first surface. Alternatively, the inclination angle of a portion of the first surface may be different from the inclination angle of another portion of the first surface. According to this structure, when the user wears the headphone, the main body can be tilted toward the first surface side (the second direction side) and closely attached to the side of the user's head, just like when the first surface is a curved surface.

[0137] Furthermore, according to the above-described embodiment, the width of the first surface 121a (the distance between the outer edge and the inner edge) is uniform over the entire circumference of the first surface 121a. As an alternative, the width of the first surface may be uneven. That is, for example, the width of a portion of the opposing surfaces in the first surface may be different from the width of another portion of the opposing surfaces. Specifically, the width of the first surface may also match the width of the main body (the distance between the outer edge and the inner edge of the main body). That is, for example, the width of the front and rear portions of the first surface may each be larger than the width of the upper and lower portions of the first surface.

[0138] Furthermore, the first surface may also include a recessed portion that is recessed toward the second direction. That is, for example, the first surface may also include a groove along the circumferential direction of the first surface. According to this configuration, when forming the baffle member, it is possible to suppress the generation of holes (shrinkage holes) on the first surface, thereby improving the molding accuracy of the first surface. As a result, when worn, the main body portion does not tilt unevenly toward the first surface, and the main body portion can be uniformly attached to the side of the head. In addition, the weight of the baffle member (the weight of the headphone) can be reduced.

[0139] Furthermore, the ear pad may not have a mesh portion.

[0140] In addition, the manner of the inclined portion is not limited to the present embodiment. That is, for example, the inclined portion may be inclined toward the second direction side over the entire circumference. In addition, for example, the inclination angle of the inclined portion may also change discontinuously in the circumferential direction of the inclined portion. That is, for example, the inclination angle of the inclined portion may also change intermittently locally.

[0141] In addition, the holding portion may not be inclined along the auricle of the user. That is, for example, the holding portion may be arranged perpendicular to the axial direction of the baffle member (parallel to the second surface).

[0142] In addition, part or all of the inclined portion may not be inclined relative to the second surface. That is, for example, the inclined portion may be composed of a cylindrical peripheral wall surface and an annular bottom surface. According to this structure, the peripheral wall surface is perpendicular to the second surface, and the bottom surface is parallel to the second surface. In addition, for example, the first flange portion and the inclined portion may be configured as a continuous plate. According to this structure, the inclined portion is parallel to the second surface.

[0143] Furthermore, the second surface of the first flange portion of the baffle member may not be a surface perpendicular to the central axis of the baffle member. That is, for example, the second surface may be inclined relative to the central axis. In this case, the surface used as a reference for measuring the inclination, curvature, etc. of the first surface may be an imaginary surface perpendicular to the central axis, rather than the second surface.

[0144] Furthermore, according to the above-described embodiment, the headphone 1 is a closed-type headphone. Alternatively, the headphone may be an open-type headphone.

[0145] Furthermore, in the above-described embodiment, the present invention is applied to the headphone 1. As an alternative, the present invention may also be applied to earmuffs that do not include a driving unit. The earmuffs may also include, for example, a shell, a baffle member that holds the shell, and an ear pad mounted on the baffle member. The baffle member includes an opposing surface that is opposed to the main body of the ear pad. According to this configuration, at least a portion of the opposing surface is an inclined surface that is inclined toward the second direction side as it moves from the outer edge of the opposing surface to the inner edge, or a curved surface that is bent toward the second direction side as it moves from the outer edge of the opposing surface to the inner edge. According to this configuration, the earmuffs of the present invention can easily improve the close contact between the ear pad and the side of the head at low cost, and have good sound insulation.

Claims

1. A headset, characterized in that: have: Drive unit; a baffle member that holds the drive unit; an ear pad mounted on the baffle member; as well as a housing mounted on the baffle member and accommodating the drive unit, The ear pad includes a ring-shaped main body. The baffle member includes an annular facing surface facing the main body. In a direction in which the main body is arranged relative to the baffle member as a first direction, When the direction in which the housing is arranged relative to the baffle member is the second direction, At least a portion of the opposing surface is an inclined surface that is inclined toward the second direction as it goes from the outer edge of the opposing surface toward the inner edge of the opposing surface, or a curved surface that is curved toward the second direction as it goes from the outer edge of the opposing surface toward the inner edge of the opposing surface. When not worn by a user, the distance between the main body and the inner edge of the opposing surface is greater than the distance between the main body and the outer edge of the opposing surface. When not worn by the user, the outer edge of the opposing surface abuts against the ear pad. The inner edge of the opposing surface does not abut against the ear pad.

2. The headset according to claim 1, characterized in that: The inclined surface or the curved surface is arranged on the entire circumference of the opposing surface.

3. The headset according to claim 2, characterized in that: The inclination angle of the inclined surface or the curvature radius of the curved surface is uniform over the entire circumference of the facing surface.

4. The headset according to claim 1, characterized in that: The inclination angle of a part of the facing surfaces relative to the inclined surface or the curvature radius of the curved surface is different from the inclination angle or the curvature radius of another part of the facing surfaces.

5. The headset according to claim 3 or 4, characterized in that: The inclination angle or the curvature radius is set according to an average shape of a portion surrounding a human ear.

6. The headset according to claim 4, characterized in that: When the user wears it, The inclination angle of the opposing surface arranged behind the ear of the user is larger than the inclination angle of the opposing surface arranged in front of the ear, or the curvature radius of the opposing surface arranged behind the ear is smaller than the curvature radius of the opposing surface arranged in front of the ear.

7. The headset according to claim 1, characterized in that: A distance between the outer edge and the inner edge of a portion of the opposing surfaces is different from a distance between the outer edge and the inner edge of another portion of the opposing surfaces.

8. The headset according to claim 1, characterized in that: The baffle member includes a flange portion disposed on an outer edge portion of the baffle member, The flange portion comprises: a first surface which is a surface of the flange portion on the first direction side; and The second surface of the flange portion on the second direction side, i.e., The first surface is the opposing surface, The opposing surface is inclined or curved with respect to the second surface.

9. The headset according to claim 8, characterized in that: The baffle member comprises: a holding portion that holds the driving unit; and an inclined portion disposed between the holding portion and the opposing surface, The inclined portion is inclined with respect to the second surface.

10. The headset according to claim 9, characterized in that: An inclination angle of the inclined portion with respect to the second surface continuously changes in a circumferential direction of the inclined portion.

11. The headset according to claim 9, characterized in that: When the user wears it, The holding portion is inclined with respect to the second surface so as to be along the auricle of the user.

12. The headset according to any one of claims 9 to 11, characterized in that: A portion of the inclined portion is inclined toward the first direction relative to the second surface.

13. The headset according to claim 10, characterized in that: The inclined portion includes a plurality of through holes that connect the space on the first direction side of the driving unit and the space on the second direction side of the driving unit. Each of the through holes is arranged along the circumferential direction of the inclined portion.

14. The headset according to claim 13, characterized in that: The through holes have the same shape when projected from the first direction.

15. The headset according to claim 13, characterized in that: The opening area of ​​each of the through holes increases as the inclination angle of the inclined portion increases.

16. The headset according to claim 13, characterized in that: The housing includes a covering surface covering the second direction side of the driving unit. The distance between the covering surface and the through hole decreases as the inclination angle of the inclined portion increases.

17. The headset according to claim 13, characterized in that: The ear pad includes a mesh member covering the opening of the main body on the second direction side. When the user wears it, A gap is formed between the mesh member and the inclined portion.

18. The headset according to claim 17, characterized in that: The gap is formed over the entire circumference of the inclined portion.

19. An earmuff, characterized in that: have: Baffle components; an ear pad mounted on the baffle member; and a housing mounted on the baffle member, The ear pad includes a ring-shaped main body. The baffle member includes an annular facing surface facing the main body. In a direction in which the main body is arranged relative to the baffle member as a first direction, When the direction in which the housing is arranged relative to the baffle member is the second direction, At least a portion of the opposing surface is an inclined surface that is inclined toward the second direction as it goes from the outer edge of the opposing surface toward the inner edge of the opposing surface, or a curved surface that is curved toward the second direction as it goes from the outer edge of the opposing surface toward the inner edge of the opposing surface. When not worn by a user, the distance between the main body and the inner edge of the opposing surface is greater than the distance between the main body and the outer edge of the opposing surface. When not worn by the user, the outer edge of the opposing surface abuts against the ear pad. The inner edge of the opposing surface does not abut against the ear pad.

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