JP2005167379A - Speaker system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker system enabling a passenger sitting on each seat to listen to music and the like emitted from an individually selected sound source with satisfactory sound quality by preventing sound leakage to the periphery. <P>SOLUTION: A speaker system is composed of units 10R, 10L mounted on headrest shafts 5, 6 for supporting a headrest 4. In this system, a reproduced sound emitted from a speaker 13 is reflected to the side by a main reflector 21 and a side reflector 22 which are provided at an opening of a housing 12 of a speaker unit 14 having a built-in speaker 13, and the sound is emitted from a sound emitting opening 24 formed so as to face the ears of the passenger M. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a speaker device that can be individually attached to and detached from each seat of a vehicle such as an automobile so that a passenger sitting on the seat can individually view reproduced sound from a sound source.

  Various types of audio devices such as tuners, disk players, cassette tape players, and the like that receive radio broadcasts, television broadcasts, and the like as sound sources are mounted on automobiles, and reproduced sounds are viewed through speakers appropriately installed in the vehicle. In addition, automobiles include car navigation devices in which voice guidance is performed from a built-in speaker, portable audio devices brought by passengers, mobile phones, and the like as other sound sources. Some car navigation apparatuses are equipped with an audio function as the functions become higher and multifunctional.

  In automobiles and the like, various sound sources are provided as described above. For example, a reproduction signal from a sound source selected by a driver is emitted from a speaker, so that a passenger can view the same reproduced sound. become. When a passenger wants to listen to his / her favorite music or the like, he / she listened to his / her favorite music or the like with headphones using a portable audio device he / she brought.

  On the other hand, in automobiles, in addition to fixed speakers installed at appropriate positions such as the front and rear parts, there is also an acoustic system that forms a dynamic sound field in the car by incorporating speakers in the headrest of each seat. It has been proposed (for example, Patent Documents 1 to 3). In addition, in automobiles and the like, it has also been proposed to install a speaker using a headrest shaft that supports the headrest of each seat (for example, Patent Document 4 and Patent Document 5).

  Further, in Patent Document 6, a speaker is incorporated in a headrest provided in each seat of an automobile in the same manner as in each of the above-described Patent Documents, and a reflective cover is provided at a sound emitting portion of the speaker to be close to a passenger's ear. An acoustic device is disclosed that emits sound toward the front.

JP-A-8-289389 JP-A-9-171387 Japanese Utility Model Publication No. 55-109450 Japanese Utility Model Publication No. 61-165853 JP-A-9-286285 Japanese Patent Laid-Open No. 61-131998

  In each headrest speaker described above, it is possible to configure an optimal sound field that corrects variations in sound quality, volume, etc. depending on the position of the seat in the car, and allows each passenger to view good reproduction sound individually. To do. In addition, the headrest speaker can be configured so that, for example, a sound source can be selected for each seat, so that passengers can individually view their favorite music without the hassle of wearing headphones. To do.

  In the headrest speaker, since the playback sound is emitted near the ears of each passenger, the playback sound from other seats where playback is being performed with a different sound source selected is less concerned . However, in the headrest speaker, since sound leakage from the speaker occurs, it is necessary to consider listening with a reduced volume.

  In addition, a general speaker device can obtain an efficient sound pressure level (SPL) characteristic by installing the central axis of the sound emitting part so as to be parallel to the ear hole of the viewer. It becomes like this. In addition, a general speaker device has a characteristic that distortion occurs when a reproduced sound is directly listened to near the sound emitting portion of the speaker. In each of the headrest speakers described above, it is difficult to maintain the sound pressure level characteristic and the sound quality level characteristic applied to each passenger sitting on the seat.

  The above-mentioned built-in headrest type speaker device makes the entire system expensive when installed for each seat and must be configured to fit the headrest designed for each vehicle type. Only installed and not versatile. In addition, such a speaker device has a problem in that it is not used efficiently when installed in all seats and cannot be used by a passenger sitting in a seat that is not installed.

  The headrest detachable speaker device described above is manufactured at a relatively low cost and can be installed on an existing vehicle as required. However, such a speaker device has a large size and a large amount of protrusion from the seat if it has a certain level of output performance. Therefore, it becomes a hindrance when not in use, and it is dangerous for a passenger to hit in the unlikely event. There is a problem such as.

  Furthermore, since any of the above-described speaker devices is installed at a position fixed with respect to the seat, it is difficult to install the speaker device facing the optimum position with respect to the ears of various passengers having different body shapes. Met. The speaker device has a problem in that, when a small child sits on the seat, the speaker device is far away from the ear, so that the above-described features cannot be exhibited at all, and sound leakage to the surroundings increases.

  Therefore, the present invention is a speaker that enables to listen to music and the like emitted from sound sources individually selected by passengers sitting in each seat with good sound quality while suppressing sound leakage to the surroundings. An object is to provide an apparatus.

  The speaker device according to the present invention that achieves the above-described object is mounted on a pair of headrest shafts that support the headrest so that the height of the headrest is adjustable with respect to the seat, thereby facing the both ears of the passenger sitting on the seat. And a pair of left and right units installed. In the speaker device according to the present invention, each unit includes an input unit to which a reproduction signal is input from an appropriate sound source, a speaker unit, a mounting member that is attached to and detached from the headrest shaft, and one end portion of the unit to the housing of the speaker unit. And a support arm portion that is fixed and has the other end portion fixed to the attachment member and that faces the ears of the passenger sitting on the seat. In the speaker device according to the present invention, the speaker unit has a housing having an opening that opens in a direction parallel to the direction of the face of the occupant in the installed state, and is mounted in the housing to reproduce a reproduction signal. A speaker that emits sound toward the opening, and a reproduction sound emitted from the speaker by being provided in an inclined state in the opening of the housing so as to gradually increase the facing distance toward the ear of the passenger A main reflector that reflects toward the ear side of the vehicle, and an arc-shaped side reflector that is provided on the main reflector and opens a portion facing the passenger's ear between the housing and an arc-shaped side reflector that forms a sound emission opening Composed.

  In the speaker device according to the present invention, a passenger who is installed in each seat in the vehicle by fixing one end portion of each support arm portion to the opposite headrest shaft via an attachment member, and the speaker unit is seated in the seat Be sure to face the ears. In the speaker device according to the present invention, the input unit is connected to an appropriate sound source, and the reproduction sound based on the reproduction signal selected by the passenger sitting on the seat is reproduced and emitted from the speaker unit. In the speaker device according to the present invention, the reproduced sound from the speaker is emitted from the opening of the housing that opens in a direction parallel to the direction of the occupant's face, but the passenger is provided by the main reflector provided in the housing. The sound is reflected toward the sound emission opening that is opened opposite to the ear of the vehicle and emitted in a direction parallel to the ear hole of the passenger. In the speaker device according to the present invention, the side reflector interposed between the housing and the main reflector forms a sound emitting opening that opens in a limited region facing the passenger's ear.

  According to the speaker device according to the present invention configured as described above, an existing vehicle can be installed as needed with respect to any seat by a simple operation of fixing the mounting member to the headrest shaft. For example, it is possible to release a reproduction sound based on a reproduction signal from an individually selected sound source and reduce the interference of the reproduction sound with an adjacent seat and view the passenger sitting on the seat. According to the speaker device of the present invention, the speaker unit is arranged so that the opening of the housing opens toward the front side and the reproduced sound is reflected by the main reflector, so that the side view of the passenger is secured. In addition, it is possible to view with good sound quality by suppressing the generation of noise and distortion in the housing. According to the speaker device of the present invention, sound leakage to the surroundings is suppressed by the side reflector and a sufficient sound pressure level is maintained, so that directivity is enhanced and sound of reproduced sound is emitted from the sound emission opening. To be done.

  Hereinafter, a speaker device 1 shown in the drawings as an embodiment of the present invention will be described in detail. As shown in FIGS. 1 and 2, the speaker device 1 is configured so that all seats or selections can be made by retrofitting the seats 3 a to 3 d (hereinafter collectively referred to as seats 3) of the automobile 2 as necessary. It is installed and used in any seat. The speaker device 1 is an appropriate sound source such as a broadcast receiving tuner, a disk player or a cassette tape player mounted on the automobile 2, a car navigation device, or a portable audio device brought into the vehicle by a passenger. And the passenger sitting on the seat 3 can individually view the reproduction sound based on the reproduction signal output from each sound source described above.

  The speaker device 1 supports a pair of left and right first headrest shafts 5 that support headrests 4a to 4d (hereinafter collectively referred to as headrests 4) with respect to each seat 3 so that their height positions are adjustable. The second headrest shaft 6 is installed and used as necessary. Although not described in detail, the first headrest shaft 5 and the second headrest shaft 6 are combined so as to be movable up and down along guides provided in the seat 3 so that the lower ends thereof are connected to each other. The first headrest shaft 5 and the second headrest shaft 6 are locked by a locking mechanism in a state where the first headrest shaft 5 and the second headrest shaft 6 are pulled out from the seat 3 to a predetermined position, thereby holding the headrest 4 at a predetermined height position from the seat 3.

  The speaker device 1 is attached in a state where the first headrest shaft 5 and the second headrest shaft 6 are slightly pulled out of the seat 3 and exposed as shown in FIG. The speaker device 1 includes a pair of left and right first units 10R and a second unit 10L. Note that the speaker device 1 will be simply referred to as a unit 10 in the following because the first unit 10R and the second unit 10L are configured symmetrically.

  In the speaker device 1, each unit 10 is connected to the input unit 11 connected to each sound source described above, the speaker unit 14 including the housing 12 and the speaker 13, and the first headrest shaft 5 or the second headrest shaft 6. The mounting portion 15 is detachably attached to the support arm portion 16. In the state where each unit 10 is attached to the first headrest shaft 5 and the second headrest shaft 6, the speaker device 1 is close to the ears of the passenger M sitting on the seat 3 as shown in FIG. 1. And are used so as to face each other.

  The speaker device 1 may be configured to incorporate, for example, a slightly larger speaker 13 by connecting the input unit 11 and the speaker unit 14 configured independently as will be described in detail later via a support arm unit 16. The speaker unit 14 is configured to be downsized as a whole. Note that the speaker device 1 uses, for example, an in-vehicle battery as a driving power source and is directly connected to an output terminal provided in the in-vehicle audio device or the like, so that the input unit 11 can be reduced in size. A part of these functions may be built in the speaker unit 14.

  The input unit 11 includes a case 17 as shown in FIGS. 2 and 3, and is connected to the speaker unit 14 by a pair of reproduction signal supply cords 18a for supplying a reproduction signal. Although not described in detail, the input portion 11 is provided with an appropriate attachment portion formed of a hook or a clip structure on the case 17 and is installed at an appropriate location in the vehicle by the attachment portion. In the input unit 11, the reproduction signal supply cord 18 a has a sufficient length to reach from the installation location of the case 17 in a state where the speaker device 1 is attached to the headrest shafts 5 and 6.

  Although the input unit 11 is provided independently for each of the first unit 10R and the second unit 10L, for example, the reproduction signal supply cord 18a on the second unit 10L side is guided to the case 17 on the first unit 10R side. Thus, it may be configured by one case 17. The reproduction signal input code 18b is drawn from the case 17 to the input unit 11, and a reproduction signal is supplied by connecting the pin plug 19 provided at the tip of the reproduction signal input code 18b to each sound source described above.

  Note that the input unit 11 houses a dry battery or a secondary battery for power supply inside the case 17 and a circuit board on which a power circuit, an amplifier circuit, and the like are mounted. The input unit 11 may be provided with a sound source selection unit and a control unit such as a volume. In the speaker device 1, for example, in-vehicle audio can be used instead of or in addition to the reproduction signal input cord 18 b and the pin plug 19 described above by mounting a wireless receiving circuit using, for example, infrared rays or the like in the case 17 of the input unit 11. A reproduction signal may be supplied wirelessly from the device side. In the speaker device 1, a reproduction signal may be transmitted and received between the input unit 11 and the speaker unit 14 wirelessly.

  By the way, in the speaker device 1, as will be described later, the reproduction sound emitted from the speaker 13 is generated by installing each speaker unit 14 so as to face the ears of the passenger M sitting on the seat 3 by the support arm unit 16. The passenger M is configured to listen directly. In a general speaker device, as described above, the speaker is installed so that the central axis thereof is parallel to the ear hole of the viewer so that an efficient sound pressure level characteristic can be obtained. Further, a general speaker device has a characteristic that distortion occurs when a reproduced sound is directly listened to in a state where a certain volume is secured near a sound emitting portion of the speaker.

  Therefore, in the speaker device 1, the speaker unit 14 includes the housing 12 and the speaker 13 as described above, and the sound pressure is provided by providing the main reflector 21 and the side reflector 22 as shown in FIGS. 3 and 4. It is configured to improve characteristics and sound quality characteristics. The housing 12 is formed of a synthetic resin material into a generally cup shape having one side surface opened, and an appropriate mounting portion is integrally formed inside although not shown. Although not described in detail, the housing 12 accommodates the sound emitting portion 13a so as to face the opening 12a by fixing the speaker 13 on each mounting portion via the baffle plate 20. In addition, the housing 12 should just be comprised equivalent to a general speaker box, and is not limited to a cup-shaped shape.

  Although not described in detail, the housing 12 is formed with an attachment hole penetrating into the internal space and fitted with a bush 23 in the outer peripheral portion. The bush 23 constitutes an attachment member for attaching the support arm portion 16 to the housing 12 while preventing the reproduction sound from leaking. The bush 23 constitutes a drawing member that protects the signal supply cord 18 and draws the reproduction signal supply cord 18 a from the housing 12.

  Each speaker unit 14 is provided with, for example, a switch or a volume that is arranged between the speaker 13 and the reproduction signal supply cord 18a in the housing 12 and performs on / off switching of the supplied reproduction signal. Also good. Of course, these switches and volumes may be provided, for example, in the case 17 of the input unit 11 described above in order to keep the speaker unit 14 compact.

  The main reflector 21 is formed of a synthetic resin material or the like into a disk shape that is substantially the same diameter as the outer diameter of the housing 12 and has a relatively large thickness. As shown in FIGS. 3 and 4, a speaker is connected via the side reflector 22. It is combined with the opening 12a of the housing 12 so as to face the 13 sound emitting portions 13a with a predetermined interval. The main reflector 21 is inclined with respect to the sound emitting portion 13a of the speaker 13 with respect to the surface direction and the diametrical direction due to the structure of the side reflector 22 which will be described in detail later, and emits reproduced sound emitted from the sound emitting portion 13a The light is reflected from the opening 24 toward the outer periphery of the housing 12.

  As described above, the main reflector 21 is configured so that the sound emitting opening 24 has a slightly larger opening size by being given a three-dimensional inclination in the plane direction and the diameter direction. The sound emission opening 24 is configured such that the axis line with the ear hole of the occupant M sitting on the seat 3 becomes more parallel by exhibiting such an opening shape.

  In the speaker device 1, the speaker units 14 are arranged on both sides of the both ears of the passenger M sitting on the seat 3, but the sound emission part 13 a of the speaker 13 is opposed to both ears in order to maintain sound pressure characteristics. When it arrange | positions in this way, a projection area will become large and the protrusion amount in a side part will become large, and will disturb a side visual field. In the speaker device 1, the sound emitting part 13 a of the speaker 13 is directed to the front to reduce the projection area and secure the side view of the passenger M. In the speaker device 1, the main reflector 21 reflects the reproduced sound emitted from the speaker 13 toward the sound emission opening 24, so that the axis line between the sound emitting part 13 a of the speaker 13 and both ears of the passenger M is obtained. Thus, the directivity is improved to improve the sound pressure level characteristic for the occupant M.

  In the speaker unit 14, by providing the side reflector 22, it is possible to prevent the reproduced sound reflected by the main reflector 21 from leaking from the outer peripheral portion of the housing 12 to the surroundings and to be efficiently guided to both ears of the passenger M. Configured. The side reflector 22 is formed in a substantially semi-cylindrical shape having substantially the same circumferential diameter as that of the housing 12 by using a synthetic resin material or the like. The side reflector 22 is fixed to the opening edge of the opening 12 a of the housing 12 at the lower end edge so as to be coaxial with the housing 12.

  The side reflector 22 constitutes a sound emitting opening 24 having a substantially ½ circumferential length between the housing 12 and the main reflector 21 by fixing the upper edge to the inner surface of the main reflector 21. The side reflector 22 prevents the reproduced sound from leaking from the entire circumference of the housing 12 so that the reproduced sound reflected by the main reflector 21 is emitted from the sound emitting opening 24 to the side.

  The side reflector 22 is formed so that the side edge portion for fixing the main reflector 21 is gradually increased in length in the axial direction from one end portion in the circumferential direction to the other end portion, and from the inner peripheral side to the outer peripheral side. It is formed with an inclination that gradually decreases in height. Therefore, the side reflector 22 is integrated with an inclination that causes the main reflector 21 to incline with respect to the housing 12 with respect to the surface direction and the diameter direction, and gradually increases the opening shape toward the sound emitting opening 24. By doing so, the sound emitting opening 24 is opened toward the passenger M's ear.

  The side reflector 22 improves the directivity toward the passenger M so that the sound pressure characteristic is maintained and the reproduced sound is viewed in a good state. The side reflector 22 prevents sound leakage from the outer peripheral portion of the housing 12 and suppresses the troublesome listening caused by interference among passengers who listen to different reproduction sounds.

  By the way, in the speaker unit 14, when the main reflector 21 is directly attached to the housing 12, the main reflector 21 has a structure in which a partial region of the outer peripheral portion is fixed in a cantilever state. In the speaker unit 14, it is difficult to fix the main reflector 21 with high strength. In the speaker unit 14, when a large force is applied to the main reflector 21, there is a risk that the speaker unit 14 may drop off or be damaged. In the speaker unit 14, the main reflector 21 vibrates in accordance with the reproduction operation of the reproduction sound, and noise is generated, thereby preventing good reproduction sound from being heard. In the speaker unit 14, when the main reflector 21 is firmly fixed to the housing 12, the speaker unit 14 becomes large and heavy.

  The side reflector 22 fixes the main reflector 21 to the housing 12 in a region having a length approximately half of the circumferential direction of the opening 12a. The side reflector 22 is formed integrally with the inner surface of the main reflector 21 so as to have a rib action and improve its mechanical rigidity. Therefore, in the speaker unit 14, the main reflector 21 can be firmly fixed to the housing 12, and the mechanical strength is improved and the generation of noise due to vibration is reduced.

  The speaker device 1 is attached to and detached from the first headrest shaft 5 or the second headrest shaft 6 described above via an attachment portion 15. The mounting portion 15 includes a mounting member 25, a first mounting bolt 26 and a first nut 27, a pair of second mounting bolts 28a and 28b (hereinafter collectively referred to as a second mounting bolt 28), and a pair of second nuts. 29 (hereinafter collectively referred to as a second nut 29). The mounting member 25 is made of a synthetic resin material or aluminum alloy material that is lightweight and has high mechanical strength, and is formed in a substantially rectangular plate shape as a whole. As shown in FIGS. 5 and 6, the headrest shaft fitting hole 30, Support arm mounting hole 31, first slot 32, second slot 33, first bolt hole 34, and a pair of second bolt holes 35a, 35b (hereinafter collectively referred to as second bolt hole 35). )).

  The headrest shaft fitting hole 30 has an inner diameter substantially equal to the outer diameter of the first headrest shaft 5 or the second headrest shaft 6, and is formed so as to penetrate the mounting member 25 in the thickness direction. The headrest shaft fitting hole 30 is formed with a first slot 32 that opens at a side end of the attachment member 25 over a part of the headrest shaft fitting hole 30. The mounting member 25 expands the opposite end portions 25a and 25b divided by the first slit 32, so that the first headrest shaft 5 or the second headrest shaft 6 is moved from the side to the headrest shaft fitting hole 30. Fit.

  The attachment member 25 is formed with a first bolt hole 34 penetrating in the thickness direction so as to communicate perpendicularly to the first slit groove 32. In the mounting member 25, the first mounting bolt 26 is passed through the first bolt hole 34 in a state where the first headrest shaft 5 or the second headrest shaft 6 is fitted in the headrest shaft fitting hole 30. The mounting member 25 is fixed by tightening the outer periphery of the first headrest shaft 5 or the second headrest shaft 6 in the headrest shaft fitting hole 30 by screwing the first nut 27 into the tip of the first mounting bolt 26. To do.

  The attachment member 25 is detached from the first headrest shaft 5 and the second headrest shaft 6 by loosening the first nut 27 and removing the first attachment bolt 26 from the first bolt hole 34. The attachment member 25 is attached to the first headrest shaft 5 or the second headrest shaft 6 by using, for example, a wing nut as the first nut 27, and can be easily removed without using a jig or the like. become.

  The support arm attachment hole 31 is formed so as to penetrate the attachment member 25 in the thickness direction orthogonal to the penetration direction of the headrest shaft fitting hole 26. The support arm mounting hole 31 is formed with a second slot 33 that partially opens at the side end of the mounting member 25 over the entire length thereof. The attachment member 25 is fitted with a connecting pipe member 37a provided on a spiral pipe 36 constituting the support arm part 16 described later in a state where the opposite ends 25c and 25d divided by the second slit 33 are expanded. Inserted.

  The attachment member 25 is formed with second bolt holes 35 communicating perpendicularly to the second slit groove 33 so as to be spaced apart in the vertical direction and penetrate in the thickness direction. In the mounting member 25, the second mounting bolts 28 are respectively inserted through the second bolt holes 35 in a state where the spiral tube 36 is inserted into the support arm mounting hole 31. The mounting member 25 is fixed by tightening the outer periphery of the first headrest shaft 5 or the second headrest shaft 6 in the support arm mounting hole 31 by screwing the second nut 29 into the tip of the second mounting bolt 28. To do.

  The attachment member 25 removes the support arm portion 16 by loosening the second nut 29 and removing the second attachment bolt 28 from the second bolt hole 35. Therefore, the attachment member 25 enables the support arm portion 16 and the speaker unit 14 to be detached from the seat 3 while being attached to the first headrest shaft 5 and the second headrest shaft 6.

  Note that the mounting portion 25 is not limited to the above-described configuration, and may be any appropriate structure that allows the speaker device 1 to be detachably attached to the first headrest shaft 5 or the second headrest shaft 6. The attachment portion 25 may have a structure such as a so-called clothespin that sandwiches the first headrest shaft 5 and the second headrest shaft 6, for example.

  The support arm portion 16 includes the above-described spiral tube 36, and a first connection tube member 37 and a second connection tube member 38 that are integrated with both end portions 36a and 36b of the spiral tube 36, respectively. The spiral tube 36 is made of a tube material having a substantially corrugated cross-section formed continuously in the axial direction by a synthetic resin material that is lightweight and has high mechanical strength, or a metal material such as stainless steel or aluminum alloy. As is well known, the spiral tube 36 self-holds a predetermined posture in a normal state. However, by applying a strong force, the spiral tube 36 is bent at an arbitrary position and at an arbitrary angle, and this curved state is maintained. Flexible.

  The spiral tube 36 holds the speaker unit 14 in a predetermined posture with the mounting portion 15 according to the characteristics described above, and enables the speaker unit 14 to be directed to an arbitrary angle or position. The spiral tube 36 pulls the reproduction signal supply cord 18a from the speaker unit 14 and guides it up to the seat 3 without tumbling the air. Although not shown, the spiral tube 36 is attached with a blade made of a resin sheet or the like on the outer periphery, thereby restricting a change in length of the entire length and preventing adhesion of dust or the like. Try to protect against damage.

  The first connecting pipe member 37 is formed to have substantially the same diameter as the shaft hole of the bush 23 provided in the housing 12 of the speaker unit 14 described above, and a screw is formed on the outer peripheral portion although the details are omitted. The first connecting pipe member 37 has one end coupled to the one end 36 a of the helical tube 36 and the other end formed with the outer threaded portion passing through the bush 23 and inserted into the housing 12. The first connecting pipe member 37 is fixed by fixing an outer peripheral screw portion to an attachment portion formed in the housing 12. A reproduction signal supply cord 18 a connected to the speaker 13 is inserted into the first connection pipe member 37 and guided into the spiral pipe 36.

  The second connecting pipe member 38 is formed to have substantially the same diameter as the shaft hole of the support arm mounting hole 31 of the mounting member 25 described above, and one end side thereof is coupled to one end portion 36 a of the helical tube 36. The second connecting pipe member 38 passes through the support arm mounting hole 31 and is fixed to the mounting member 25 by tightening the second nut 29 against the second mounting bolt 28 as described above. From the second connecting pipe member 38, the reproduction signal input cord 18b inserted through the spiral pipe 36 is drawn out.

  In the speaker device 1 configured as described above, the first unit 10R is attached to the first headrest shaft 5 exposed by slightly lifting the headrest 4 from the seat 3 as shown in FIG. The second unit 10 </ b> L is attached to the shaft 6. In the speaker device 1, each unit 10 has the attachment portion 15 fixed to the first headrest shaft 5 or the second headrest shaft 6, and the input portion 11 is connected to an appropriate sound source mounted on the automobile 2. In the speaker device 1, the support arm portion 16 is appropriately bent at an intermediate position according to the passenger M sitting on the seat 3, so that the sound emission opening 24 of the speaker unit 14 is seated on the seat 3. It faces the ear of the person M.

  In the speaker device 1, the first headrest shaft 5 or the second headrest shaft 6 is fitted into the headrest shaft fitting hole 30 of the mounting member 25, and the first mounting bolt 26 inserted through the first bolt hole 34 is used. The mounting member 25 is fixed to the first headrest shaft 5 or the second headrest shaft 6 by screwing and tightening the first nut 27. In the speaker device 1, the mounting portion 15 is hidden between the seat 3 and the headrest 4 by pressing the headrest 4 against the seat 3.

  In the speaker device 1, the second connecting pipe member 38 of the support arm portion 16 is fitted into the support arm mounting hole 31 of the mounting member 25. In the speaker device 1, the support arm portion 16 is integrated with the mounting portion 15 by screwing and tightening the second nut 29 into the second mounting bolt 28 inserted through the second bolt hole 35. In the speaker device 1, the speaker unit 14 is integrated with the support arm portion 16.

  In the speaker device 1, the reproduction signal input cord 18 b pulled out from the second connecting pipe member 38 is guided into the vehicle without getting in the way, and the case 17 of the input unit 11 is fixed to an appropriate location via the coupling unit. In the speaker device 1, the pin plug 20 of the input unit 11 is connected to an output jack of an appropriate sound source, so that a reproduction signal output from the sound source is transmitted to the speaker unit via the reproduction signal supply code 18 a and the reproduction signal input code 18 b. 14 is supplied.

  In the speaker device 1, an adjustment operation of the support arm unit 16 is performed by the passenger M sitting on the seat 3 so that the speaker unit 14 is positioned near the ear. In the speaker device 1, as described above, by using the spiral tube 36 for the support arm portion 16, it is possible to appropriately curve or change the direction of the midway portion, as shown in FIG. 7. 14 faces the passenger's M ear. In the speaker device 1, in this case, the bending state of the support arm portion 16 is adjusted so that the sound emission opening 24 of the speaker unit 14 faces the ear of the passenger M facing forward.

  In the speaker device 1, when the occupant sitting on the seat 3 is an adult MM as shown in FIG. 7, the adjustment amount for bending the spiral tube 36 of the support arm portion 16 because the head is at the position of the headrest 4. There are few. On the other hand, in the speaker device 1, when the passenger sitting on the seat 3 is a child MS as shown in FIG. 8, the head may not reach the headrest 4. In the speaker device 1, the speaker unit 14 can be made to face the ear of the child MS by largely bending the spiral tube 36 of the support arm portion 16 downward as shown in FIG. Therefore, in the speaker device 1, the adult MM to the serving MS can be used interchangeably.

  In the speaker device 1, when the reproduction signal output from the sound source is supplied from the input unit 11 to the speaker unit 14 via the cord 18 that is conducted through the support arm unit 16, the reproduction sound based on the reproduction signal is transmitted to the speaker. 13, and is emitted from the sound emitting unit 13 a. In the speaker device 1, as described above, the speaker unit 14 is inclined with respect to the sound emitting part 13 a of the speaker 13 with respect to the surface direction and the diameter direction and gradually increases in opening diameter toward the sound emitting opening 24. The main reflector 21 is provided on the housing 12 with an inclination. In the speaker device 1, the reproduction sound emitted from the sound emission unit 13 a is reflected by the main reflector 21 and emitted toward the ear of the passenger M through the sound emission opening 24.

  In the speaker device 1, as described above, the speaker unit 14 has the arc-shaped side reflector 22 interposed between the opening 12 a of the housing 12 and the main reflector 21 so as to constitute a part of the outer peripheral portion. Become. In the speaker device 1, the side reflector 22 suppresses sound leakage around the reproduced sound emitted from the speaker 13 and reflected by the main reflector 21, and maintains a predetermined sound pressure toward the passenger M. So that the sound is emitted efficiently.

  Since the speaker device 1 is installed on each seat 3 by a simple retrofitting operation, each passenger M can view the reproduction sound based on the reproduction signal from the sound source individually selected. . In the speaker device 1, the speaker unit 14 is opposed to each passenger M's ear by a simple operation, so that it is possible to view the reproduced sound in an optimum state and to suppress interference due to mutual sound leakage. Is done. The speaker device 1 has extremely high compatibility with the difference in the body shape of the passenger M, and can be used even by a small child. In the speaker device 1, even if the occupant M hits the speaker unit 14 during getting on and off, the support arm portion 16 is deformed to absorb the impact, thereby causing damage to the mounting portion 15 or disconnection. The occurrence is reduced and the safety of the passenger M is ensured.

  By the way, in the speaker device 1, as described above, the speaker unit 14 is attached to the opening 12 a of the housing 12 with the main reflector 21 being fixed via the side reflector 22. In the speaker device 1, the attachment portion 15 is detachable with respect to the first headrest shaft 5 and the second headrest shaft 6, and the support arm portion 16 is provided with the speaker unit 14 with respect to the attachment portion 15. Is configured to be detachable.

  In the speaker device 1, the main reflector 21 that protrudes from the housing 12 in an unused state may get in the way. Further, in the speaker device 1, it is not necessary to attach and detach with a very simple operation in order to use it while being attached to a certain seat 3, but it is also considered that the attachment portion 15 is configured more simply.

  The speaker device 40 shown as the second embodiment in FIG. 9 has the same basic configuration as that of the speaker device 1 and addresses the above-described improvements and demands. The speaker device 40 opens and closes the main reflector 46 with respect to the housing 45 and the housing 45 via the side reflector 47 and a simple attachment portion 41 comprising a cylindrical attachment member 42 and a set bolt 43 as shown in FIG. And a free speaker unit 44. In the speaker device 40, the same parts as those of the above-described speaker device 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The first headrest shaft 5 and the second headrest shaft 6 can be detached from the headrest 4 by being pulled out from the guide portion of the seat 3. In the speaker device 40, after the attachment portion 41 is attached to the first headrest shaft 5 or the second headrest shaft 6 pulled out from the seat 3, the first headrest shaft 5 and the second headrest shaft 6 are again inserted into the guide portion. Installed in the seat 3.

  The attachment member 42 is formed in a cylindrical shape from a synthetic resin material or a metal material, and has an attachment hole 42 a having substantially the same diameter as the shaft diameters of the first headrest shaft 5 and the second headrest shaft 6. The attachment member 42 is formed with a boss portion 42b having a screw hole penetrating the attachment hole 42a on the outer peripheral portion. The attachment member 42 is combined by fitting the first headrest shaft 5 or the second headrest shaft 6 extracted from the seat 3 into the attachment hole 42a from the tip thereof. Note that one end portion of the spiral tube 36 constituting the support arm portion 16 is fixed to the mounting member 42 on the outer peripheral portion.

  In the mounting member 42, the screw portion of the set bolt 43 is screwed into the screw hole of the boss portion 42 b in a state where the first headrest shaft 5 or the second headrest shaft 6 is fitted into the mounting hole 42 a. As the set bolt 43 is screwed, the tip part abuts against the outer periphery of the first headrest shaft 5 or the second headrest shaft 6, so that the attachment member 42 is attached to the first headrest shaft 5 or the second headrest shaft 6. Fix it. The attachment member 42 does not have a guide structure for the reproduction signal supply cord 18a because the proximal end portion of the spiral tube 36 is directly fixed to the outer peripheral portion thereof. Therefore, the reproduction signal supply cord 18a is drawn out from the drawing hole provided in the outer peripheral portion of the spiral tube 36.

  As shown in FIGS. 10 to 12, the speaker unit 44 also has a housing 45 that is formed in a generally cup shape with one side portion opened by a synthetic resin material, and has a height direction for mounting the speaker 13 therein. A plurality of mounting boss portions 48 having mounting holes are integrally formed. In the housing 45, a first connecting pipe member 37 is fixed to a mounting hole formed in an outer peripheral portion, and a reproduction signal supply cord 18a connected to the speaker 13 is drawn through the first connecting pipe member 37. .

  As shown in FIG. 13, the housing 45 has an outer peripheral portion with a slightly increased thickness, and a stepped portion 49 is formed on the inner peripheral edge of the opening 45a over the entire periphery. The step portion 49 has a height substantially equal to the thickness of the main reflector 46 and has an inner diameter substantially equal to the outer diameter of the main reflector 46. The housing 45 is formed with a hinge recess 50 for assembling the main reflector 46 in an openable and closable manner on the inner periphery of the opening 45a as will be described in detail later. The hinge recess 50 is formed with shaft holes 50a and 50b on opposite side surfaces. The housing 45 is formed with a stopper convex portion 51 that protrudes to the stepped portion 49 so as to face the hinge concave portion 50 on the inner peripheral edge of the opening 45a.

  In the housing 45, a guide slit 52 in the height direction is formed so as to open to the opening 45a. The guide slit 52 is an arc-shaped slit having a substantially 1/2 circumferential length with respect to the circumferential length of the opening 45a with the position facing the hinge recess 50 as the center, as will be described in detail later. The side reflector 47 enters and exits. The guide slit 52 is formed to have a length and an opening width substantially equal to the length and thickness of the side reflector 47.

  As described above, the housing 45 is somewhat complicated in that the step portion 49, the hinge recess 50, the stopper projection 51, and the guide slit 52 are formed in the opening 45a. The part which protrudes in a bowl shape also arises. Therefore, the housing 45 may be configured by combining, for example, a cup-shaped main body portion and a plate body in which the above-described portion is formed.

  The main reflector 46 is also formed in a substantially disc shape having a thickness and an outer diameter substantially equal to the height and inner diameter of the stepped portion 49 of the housing 45 by a synthetic resin material or the like. As shown in FIG. 14, the main reflector 46 is integrally formed with a hinge convex portion 53 at an outer peripheral portion facing the hinge concave portion 49 of the housing 45. The hinge protrusion 53 is formed so that the width thereof is substantially equal to the width of the hinge recess 50, and the shaft parts 53a and 53b are integrally formed on both side surfaces so as to face the shaft holes 50a and 50b on the hinge recess 50 side. Has been. The main reflector 46 has the same function as that of the main reflector 21 of the speaker device 1 described above in a state in which the opening 45a of the housing 45 is opened, and thus the description thereof is omitted.

  The main reflector 46 is configured to open and close the opening 45a with respect to the housing 45 by combining the hinge convex portion 53 in the hinge concave portion 50 and fitting the shaft portions 53a and 53b into the opposite shaft holes 50a and 50b. Combined. The main reflector 46 is imparted with a turning habit in the direction of opening from the housing 45 by assembling the torsion spring 54 to the shaft portions 53a and 53b, for example. The main reflector 46 may be provided with such a turning behavior by an elastic means such as a leaf spring instead of the torsion spring 54.

  The main reflector 46 constitutes a cover body of the housing 45 with the outer peripheral edge facing the hinge convex portion 53 being locked by the stopper convex portion 51 when the opening 45 a of the housing 45 is closed. As shown in FIG. 12, the main reflector 46 is housed in a stepped portion 49 to form a housing 45 having no unevenness, and is prevented from being damaged due to catching or the like.

  The main reflector 46 is rotated by the elastic force of the torsion spring 54 to release the opening 45a as shown in FIG. The main reflector 46 is rotated at a predetermined angle with respect to the housing 45 by the stopper structure, and the rotation operation is stopped to form a sound emitting opening 55 between the opening 45a. Further, the main reflector 46 is provided with a lock structure (not shown) between, for example, the housing 45 and is fixed in a state of being opened at a predetermined angle defined by the stopper structure. The sound emission opening 55 is configured in the same manner as the sound emission opening 24 of the speaker device 1 described above.

  The details of the stopper structure are omitted. For example, the stopper structure includes an angle restricting structure formed on the hinge convex portion 53 and the stopper convex portion 51, and an angle restricting structure formed on the side reflector 47 and the guide slit 51 described later. For example, the main reflector 46 is formed to have a hinge projection 53 in a cylindrical shape, and is inserted into the shaft holes 50 a and 50 b of the hinge recess 50 on the housing 45 side so as to be rotatable with respect to the housing 45. You may comprise.

  As shown in FIGS. 10 and 14, a side reflector 47 is integrally formed on the inner surface of the main reflector 46. The side reflector 47 is formed of an arc-shaped convex portion having a circumferential length of approximately ½ with respect to the circumferential length of the main reflector 46 with the position facing the hinge convex portion 53 as the center, as described above. The guide slit 52 formed in the housing 45 is formed with a length and thickness substantially equal to the opening width. The side reflector 47 is the same as the side reflector 22 of the speaker device 1 described above, so that the description thereof is omitted.

  The side reflector 47 is fitted into the guide slit 52 over the entire length when the main reflector 46 is assembled to the housing 45. Even when the main reflector 46 is rotated at a predetermined angle with respect to the housing 45 to open the opening 45a, the side reflector 47 has its lower end portion extending over the entire length as shown in FIG. 52 has a height that can be held in a state of being fitted in the inside.

  As for the side reflector 47, like the side reflector 22 of the speaker device 1 described above, the main reflector 46 is inclined with respect to the opening 45 a of the housing 45 with respect to the surface direction and the diameter direction and directed toward the sound emission opening 55. Thus, the main reflector 46 is integrally formed so as to be inclined so as to gradually increase the opening shape. Specifically, as shown in FIG. 14, the side reflector 47 is formed so as to be slightly longer on the side of the portion where the height is larger than the hinge convex portion 53. For example, the side reflector 47 forms a bent portion at the lower end edge, and when the main reflector 46 rotates, the side reflector 47 makes contact with the lower end portion of the guide slit to constitute the angle adjusting structure described above. Good.

  In addition, although the speaker unit 44 is configured to rotatably combine the main reflector 46 with respect to the housing 45 by the above-described structure, it is needless to say that the speaker unit 44 is not limited to such a structure. For example, the speaker unit 44 may be rotatably combined with the main reflector 46 via a hinge portion integrally formed on the outer peripheral portion of the housing 45. Further, the speaker unit 44 may be provided with a hinge structure in the housing 45 and the side reflector 47 so that the housing 45 is rotatably combined with the main reflector 46 via the side reflector 47.

  In the speaker device 40, as described above, the speaker unit 44 is configured by combining the main reflector 46 with the housing 45 so as to be rotatable. In the speaker device 40, the main reflector 46 combined with a predetermined opening angle with respect to the housing 45 constitutes a sound emission opening 55 and is appropriately in a good condition for the passenger M sitting on the seat 3. Plays a playback sound based on the playback signal output from the sound source.

  In the speaker device 40, when the main reflector 46 protruding from the housing 45 becomes an obstacle when not in use, the main reflector 46 is accommodated in the housing 45. In the speaker device 40, the lock structure is released and the main reflector 46 is pushed toward the housing 45 against the elastic force of the torsion spring 54. In the speaker device 40, the main reflector 46 is housed in the stepped portion 49 and the outer peripheral edge is locked by the stopper convex portion 51.

  By the way, in the speaker device 40, like the speaker device 1, the speaker unit 44 directs the sound emitting part 13 a of the speaker 13 to the front so as to reduce the projection area and secure the side view of the passenger M. used. In the speaker device 40, the reproduction sound emitted from the speaker 13 by the main reflector 46 and the side reflector 47 is reflected to the sound emission opening 55 side, and the sound emission part 13 a of the speaker 13 and both ears of the passenger M The sound pressure level characteristic is maintained by correcting the deviation of the axis.

  In the speaker device 40, it is necessary to set the opening angle of the main reflector 46 with respect to the housing 45 to a certain degree when the axial deviation between the sound emitting opening 55 and both ears of the passenger M is to be made smaller. For this reason, the speaker device 40 has a limit in reducing the projected area of the speaker unit 44, which reduces the side visibility characteristics of the passenger M, and the mechanical coupling strength of the main reflector 46 and the side reflector 47 with respect to the housing 45. descend. Further, in the speaker device 40, the opening size of the sound emission opening 55 is increased, and the directivity of the reproduced sound is lowered.

  In the speaker device 40, when the opening angle of the main reflector 46 is reduced, the direction of the reproduced sound reflected by the main reflector 46 and guided to the sound emission opening 55 side is close to the housing 45 side. Therefore, in the speaker device 40, a state in which a part of the reproduced sound hits the peripheral wall of the opening 45 a facing the hinge portion of the housing 45 and is confined in the housing 45. In the speaker device 40, the sound pressure and the sound quality may be reduced due to this.

  The speaker device 60 shown in FIG. 15 as the third embodiment is basically a speaker unit 61 in which one side portion of the main reflector 46 is rotatably combined by a hinge portion 63 whose details are omitted with respect to the housing 62. The configuration is the same as that of the speaker device 40. The speaker device 60 improves the above-described problem by a fixing structure of the speaker 13 to be described later, and the sound is emitted from the sound emission opening portion 64 that is opposed to the hinge portion 63 and is formed between the housing 62 and the main reflector 46. The sound pressure characteristics and sound quality characteristics of the reproduced sound are further improved.

  The speaker device 60 fixes the baffle plate 20 of the speaker 13 on a plurality of mounting boss portions 65 formed in the housing 62 as will be described in detail later. The speaker device 60 is characterized by a fixing structure of the speaker 13. . Since the speaker device 60 has the other configuration equivalent to that of the speaker device 1 or the speaker device 40 described above, the description thereof is omitted by attaching the same reference numerals to the corresponding portions.

  The speaker device 60 is also attached to each of the first headrest shaft 5 and the second headrest shaft 6 that support the headrest 4 with respect to the seat 3 as described above, and the speaker unit 61 is placed at the ear of the passenger M sitting on the seat 3. Face each other. The speaker device 60 also has a housing 62 whose one side surface portion is opened by a synthetic resin material and is formed into a generally cup shape. Also in the speaker device 60, the speaker unit 61 is supported by a hinge part 63, which is not described in detail, so that a main reflector 46 in which a side reflector 47 is integrated with a housing 62 is rotatably supported on one side, and is opposed to the hinge part 63. The sound emission opening 64 is formed on the side surface.

  In the speaker device 60, the opening angle of the sound emitting opening 64, in other words, the opening angle θ of the main reflector 46 with respect to the housing 61 is set smaller than the opening angle of the speaker device 40 described above. As described above, the speaker device 60 fixes the occurrence of the sound-humidification phenomenon in the housing 61 caused by reducing the opening angle θ1 of the main reflector 46 by inclining the baffle plate 20 toward the sound emission opening 64 side. It is comprised so that it may be suppressed by doing.

  As described above, the housing 61 is integrally formed with a plurality of mounting boss portions 65 for fixing the baffle plate 20 therein, and these mounting boss portions 65 are formed at different heights. That is, in the housing 61, as shown in FIG. 15, the height of the mounting boss 65a formed near the hinge 63 is higher than the mounting boss 65b formed near the sound emission opening 64. Is formed to be large.

  In the housing 61, the speaker 13 is accommodated with the mounting portions formed on the outer peripheral portion of the baffle plate 20 facing the mounting boss portions 65. The baffle plate 20 is attached to the respective attachment bosses 65 opposed to each other so that the baffle plate 20 is gradually lowered from the hinge 63 side, in other words, inclined in the direction opposite to the inclination direction of the main reflector 46 with respect to the housing 61. It is housed and fixed in the housing 61 in an inclined state with an angle θ2.

  In the speaker device 60, the inclination angle θ1 of the main reflector 46 is set to be small as described above, but the main reflector 46 and the baffle plate are fixed by fixing the baffle plate 20 in the housing 62 with the inclination angle θ2. The opening angle facing 20 is θ1 + θ2 = θ. Therefore, in the speaker device 60, the reproduced sound emitted from the baffle plate 20 with an angle of θ2 is reflected by the main reflector 46 having a small inclination angle θ1, thereby obtaining the same angle as that of the speaker device 20 described above. Thus, sound is emitted from the sound emission opening 64. In the speaker device 60, the reproduced sound is emitted from the sound emission opening 64 with sound pressure characteristics and sound quality characteristics equivalent to those when the main reflector 46 is attached to the housing 62 with a large opening angle.

  In the speaker device 60, a plurality of mounting bosses 65 are integrally formed in the housing 61 to fix the baffle plate 20 of the speaker 13. However, the speaker device 60 is not limited to such a fixing structure. Of course. The housing 61 may be formed with a step portion that supports the bottom surface of the baffle plate 20 over the entire circumference on the inner peripheral portion, and an attachment hole may be formed in the step portion to fix the baffle plate 20. Any structure may be employed as long as the speaker 13 is housed and fixed by inclining 20.

  In the speaker device 60, one side portion of the main reflector 46, in which the side reflector 47 is formed integrally with the housing 61 via the hinge portion, is rotatably combined, but is not limited to such a structure. . Needless to say, the structure in which the baffle plate 20 is tilted and fixed is applied to the speaker device 1 shown as the first embodiment in which the main reflector 21 is fixed to the housing 12, for example. In the speaker device 1 as well, sound pressure characteristics and sound quality characteristics can be improved.

  By the way, also in the above-described speaker device 60, a part of the reproduced sound reflected by the main reflector 46 hits the outer peripheral portion of the housing 62 facing the hinge portion 63, and the sound quality characteristic equivalent to free sound emission cannot be obtained. There is. The speaker device 70 shown as the fourth embodiment in FIGS. 16 and 17 follows the characteristics of the speaker device 60 described above and reduces the sound-humidification phenomenon in the housing 72 of the speaker unit 71, thereby further improving sound pressure characteristics. And to improve the sound quality characteristics. Further, in the speaker device 70, for example, when the passenger M listens to the reproduced sound at a relatively low volume like background music, the reproduced sound can be heard without opening the main reflector 46. The

  The speaker device 70 is characterized in that a sub sound emission hole 73 is formed in a part of the housing 72 and a reproduced sound with a small volume can be viewed even when the main reflector 46 is closed by the sub sound emission hole 73. doing. Since the other configuration of the speaker device 70 is the same as that of the above-described speaker device 60, description thereof is omitted by attaching the same reference numerals to the corresponding portions.

  The housing 72 is also formed by rotatably combining one side portion of the main reflector 46 in which the side reflector 47 is integrally formed via a hinge portion. The housing 72 is formed with a sub sound emitting hole 73 formed of a plurality of through holes on the outer peripheral wall facing the hinge portion. The sub sound emitting hole 73 may be formed by, for example, performing post-processing such as punching on the molded housing 72.

  The speaker device 70 is used with the main reflector 46 open to the housing 72 as shown in FIG. In the speaker device 70, the reproduction sound emitted from the speaker 13 is reflected by the main reflector 46 and emitted from the sound emission opening 64 toward the passenger M's ear. In the speaker device 70, a part of the reproduced sound reflected by the main reflector 46 is emitted toward the inside of the housing 72, but the sound is stored by being emitted outward through the sub sound emission hole 73. Is reduced. Therefore, the speaker device 70 is viewed by the passenger M in a good state with improved sound pressure characteristics and sound quality characteristics of the reproduced sound.

  Further, the speaker device 70 is closed with respect to the housing 72 as shown in FIG. 17 so that the main reflector 46 does not get in the way and keeps the side view when not in use. . In the speaker device 70, when the reproduced sound is emitted from the speaker 13 based on the reproduced signal even in this state, the reproduced sound is emitted from the sub sound emission hole 73. In the speaker device 70, since the sub sound emitting hole 73 is provided on the outer peripheral portion of the housing 72 so as to face the passenger M's ear, the passenger M can sufficiently recognize the reproduced sound.

  In the speaker device 70, instead of the sub sound emitting hole 73, for example, an appropriate notch may be formed in the opening edge of the housing 72 to configure the sub sound emitting hole. Further, in the speaker device 70, a plurality of fine holes may be formed along the opening edge of the housing 72 to constitute the sub sound emitting holes. Further, the speaker device 70 may be configured to adjust the sound quality characteristics by sticking a mesh-like sheet to the inner peripheral surface of the housing 72 so as to close the sub sound emitting hole 73.

  In the speaker device 70, one side portion of the main reflector 46, in which the side reflector 47 is formed integrally with the housing 72 via the hinge portion, is rotatably combined. However, the speaker device 70 is not limited to such a structure. . Needless to say, the structure provided with the sub sound emission holes is also applied to the speaker device 1 shown as the first embodiment in which the main reflector 21 is fixed to the housing 12, for example. In the speaker device 1 as well, sound pressure characteristics and sound quality characteristics can be improved.

  In addition, although each embodiment mentioned above was installed and used for the seat 3 of the motor vehicle 2, of course, it is not limited to this usage pattern. The speaker device is preferably used in various vehicles having a seat provided with a headrest.

It is explanatory drawing of the use condition of the state which installed the speaker apparatus shown as embodiment in each seat of a motor vehicle. It is a disassembled perspective view showing a seat and a speaker apparatus. It is a front view of a speaker apparatus. It is a side view of a speaker apparatus. It is a top view of an attachment member. It is a side view of an attachment member. It is explanatory drawing of the use condition which the adult sat on the seat. It is explanatory drawing of the use condition which the child sat on the seat. It is a perspective view of the speaker apparatus shown as 2nd Embodiment. It is an exploded sectional view of a speaker unit shown as a 2nd embodiment. It is a side view of the speaker unit in a state where the main reflector is opened. It is a side view of the speaker unit in a state where the main reflector is closed. It is a top view of the speaker unit of the state which removed the main reflector. It is a bottom view of a main reflector. It is a partially notched side view of the speaker unit shown as 3rd Embodiment. It is a front view of the state which opened the main reflector of the speaker unit shown as 4th Embodiment. It is a front view of the speaker unit in a state where the main reflector is closed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Speaker apparatus, 2 Car, 3 seats, 4 headrest, 5 1st headrest axis | shaft, 6 2nd headrest axis | shaft, 10 unit, 11 input part, 12 housing, 12a opening part, 13 speaker, 14 speaker unit, 15 attachment part, 16 Support arm portion, 17 Case, 20 Baffle plate, 21 Main reflector, 22 Side reflector, 24 Sound emission opening, 25 Mounting member, 30 Headrest shaft fitting hole, 31 Support arm mounting hole, 36 Spiral tube, 40 Speaker device , 41 mounting portion, 42 mounting member, 44 speaker unit, 45 housing, 46 main reflector, 47 side reflector, 48 mounting boss portion, 50 hinge recess, 52 guide slit, 53 hinge recess, 55 sound emission opening, 60 speaker device , 61 Speaker unit, 62 Howjin , 63 hinge portions, 64 sound emitting opening 65 mounting boss portion, 70 a speaker device, 71 a speaker unit, 72 housing, 73 sub sound output holes

Claims (4)

It is composed of a pair of left and right units that are respectively installed to face both ears of a passenger sitting on the seat by being attached to a pair of headrest shafts that support the headrest so that the height of the headrest can be adjusted in height.
Each of the above units has an input unit for receiving a playback signal from an appropriate sound source,
A housing having an opening that opens in a direction parallel to the direction of the face of the occupant in the installed state; and a speaker that is attached in the housing and reproduces the reproduction signal and emits the sound toward the opening. The reproduction sound emitted from the speaker is directed toward the passenger's ear side by being provided in an inclined state in the opening of the housing so as to gradually increase the facing distance toward the passenger's ear. A speaker unit having a main reflector to be reflected;
A mounting member attached to and detached from the headrest shaft;
A support arm portion having one end portion fixed to the housing of the speaker unit and the other end portion fixed to the mounting member so that the speaker unit faces an ear of a passenger sitting on the seat. ,
The main reflector of the speaker unit is provided with an arc-shaped side reflector that forms a sound emitting opening by opening a portion facing the occupant's ear between the housing and the housing through the sound emitting opening. A speaker device, wherein the reproduced sound reflected by the main reflector is emitted toward an occupant's ear.   The support arm portion has flexibility over substantially the entire length, and is suitably curved at an intermediate position so as to oppose the speaker unit to the ear of the passenger sitting on the seat. The speaker device according to claim 1.   The speaker device according to claim 1, wherein the speaker unit is mounted in the housing so as to be inclined toward the sound emission opening side. The speaker device according to claim 1, wherein the housing is provided with a sub sound emitting opening located in a region near the opening portion on the sound emitting opening side.

Images