JP3219108U - Bone conduction speaker built-in headrest - Google Patents

Abstract

A headrest having a built-in bone conduction speaker that allows a driver or passenger to independently listen to music or information programs as clear sound without interfering with the other party. A headrest 2 pressed by a head H of a seat occupant M of an automobile includes a headrest exterior body 4 in which a bone conduction speaker S is housed, and a material having a soft front surface inside the headrest exterior body. A front plate is provided. The headrest stay 3 is disposed on the rear side of the headrest exterior body, and has an inverted U-shape in which the upper portion is connected and the lower leg portion protrudes outside through the opening of the headrest exterior body. The rear plate, which is arranged inside the headrest stay and fixed to the headrest stay by a fixing device such as a bolt, has a telescopic axis substantially perpendicular to the plane of the front plate, and the rear end portion is fixed to the rear plate. It consists of a plurality of elastic members. [Selection] Figure 1

Description

  The present invention is a headrest attached to a seat of a vehicle such as an automobile or an airplane, and a bone conduction speaker is built into the headrest that is in contact with the back of the seated seater (driver or passenger) sitting in a normal seating posture. In particular, it is related to devices that can listen to radio broadcasts and music, especially the seated seat seated person's back head with a natural headrest, and the seated person can play music without worrying about the surrounding noise. The present invention relates to a headrest with a built-in bone conduction speaker that can be enjoyed clearly.

  Conventionally, patent applications relating to acoustic devices using bone conduction and headrests as means for listening to music, radio, and the like have been published. In particular, as shown in Patent Documents 1 to 3, there has been proposed an apparatus for listening to music or the like by providing a bone conduction speaker on a seat or headrest of a car or the like.

JP 2009-040368 A JP 2004-083004 A JP 2005-118248 A

  However, in the headrest of the seat incorporating the bone conduction speaker of Patent Document 1, the speaker mounting position is provided in the back of the head, the temporal region, or the vicinity of the tibia, but the height of the seated person and the size of the head As a result, a gap is generated between the headrest and the head, and the sound source of the bone conduction speaker cannot be transmitted well.

  In addition, the headrest incorporating the microphone and the speaker disclosed in Patent Documents 2 and 3 has a structure in which the headrest itself can be movably adjusted in the front-rear direction or the angle in order to bring the microphone or the like into close contact with the back of the seated person. By making the headrest movable, the structure of the headrest is complicated. Also, when a sudden impact is applied to the back of the head due to a rear-end collision or the like, it is difficult to make a robust structure that protects the head from impact because the headrest is movable.

  The present invention was made in consideration of the above circumstances, and the headrest receiving surface (front surface) of the headrest and the back of the seated occupant are independent of the height of the driver and passengers and the size of the head. Since the two close contact states can be easily configured in close contact with each other, a headrest with a built-in bone conduction speaker that can efficiently and clearly transmit a sound source from the bone conduction speaker is provided.

  The bone conduction speaker built-in headrest of the present invention, which has been made to solve the above-mentioned problems, is characterized in that the device according to claim 1 is a bag-shaped headrest exterior body made of a flexible material, and the headrest exterior body A front plate made of a flexible material disposed on the front side of the inside, a bone conduction speaker provided in a space between the headrest exterior body and the front plate, and an upper portion disposed on the rear surface side in the headrest exterior body The lower leg is connected to the headrest stay projecting to the outside through the opening of the headrest exterior body, the rear plate made of a rigid member disposed inside the headrest stay and fixed to the headrest stay by a fixture, and the front plate Between the rear plate and the rear plate, and has a telescopic axis substantially perpendicular to the two plates and the rear end is A bone conduction speaker built headrest comprising a plurality of elastic members that are fixed in position on the front side flat rate.

  The invention according to claim 2 is a bonerest speaker built-in headrest in which a cushion member made of a soft synthetic resin material is enclosed in the headrest exterior body.

  According to a third aspect of the present invention, the elastic member is a headrest with a built-in bone conduction speaker comprising a coil spring and a cap made of a cylindrical contractible material.

  The invention according to claim 4 has a bone conduction speaker built-in in which a concave portion is formed on the front side plane of the rear plate, the rear end portion of the elastic member is inserted into the concave portion, and the elastic member is fixed to the rear plate. It is a headrest.

  The invention according to claim 5 is the headrest with a built-in bone conduction speaker in which the rear end portion of the cap of the elastic member is fixed to the front surface side plane of the rear plate, and the elastic member is fixed to the rear plate.

  According to the first aspect of the present invention, the front plate made of a flexible material inside the headrest exterior body made of a flexible material on the front surface, the bone conduction speaker provided between the headrest exterior body and the front plate, and the headrest A rear plate made of a rigid member is fixed to a headrest stay provided inside the exterior body and holding the headrest exterior body, and a headrest with a built-in bone conduction speaker is provided in which a plurality of elastic members are provided between the front plate and the rear plate. Thus, the bone conduction speaker can be installed at a portion where the skull of the seat occupant contacts the headrest. By configuring the front surface of the headrest exterior body with the elastic member, the seated person's head can be securely wrapped in the headrest. For this reason, it is less likely to pick up noise inside and outside the vehicle interior, and the sound from the bone conduction speaker can be clearly transmitted to the seat occupant. In addition, the head can be softened by the elastic member from the danger of the head flying away due to an unexpected rear-end collision such as a following vehicle, and the backward movement can be reliably prevented by the headrest stay and the rear plate, Can prevent whiplash.

  According to the second aspect of the present invention, by encapsulating a cushion member made of a flexible synthetic resin material inside the headrest exterior body, the headrest exterior body can bulge greatly toward the head side of the seat occupant. It is possible to reliably wrap the head of the seat occupant in the headrest.

  According to the third aspect of the present invention, by accommodating the coil spring of the elastic member in the cylindrical retractable cap, the expansion and contraction of the elastic body is hindered from problems such as entanglement due to contact between the coil springs. Can be prevented.

  According to this invention which concerns on Claim 4, the recessed part is formed in the front surface side plane of a back plate, and the effect which can fix a position of an elastic member to a back plate reliably by inserting the back end part of an elastic member in this recessed part. There is.

  According to this invention concerning Claim 5, there exists an effect which can fix an elastic member to a back plate by adhering the rear-end part of the cap which accommodates an elastic member to the front side plane of a back plate.

It is a perspective view which shows the whole front seat provided with the bonerest speaker built-in headrest of 1st Example of this invention. It is a front view of the headrest with a built-in bone conduction speaker of FIG. FIG. 2 is a perspective view of a cross section of a part of the exterior body of the bone conduction speaker built-in headrest of FIG. 1. It is side surface sectional drawing of the headrest which shows immediately after a driver | operator sat down on the front seat. It is side surface sectional drawing of the headrest which shows the state which the driver | operator shown in FIG. 4 mounted and fixed the head on the headrest. (A) The longitudinal cross-sectional view which shows the elastic member provided in the inside of a headrest exterior body, (b) The longitudinal cross-sectional view which shows the state which the elastic member was pushed back and was shrunk. It is side surface sectional drawing which shows the bonerest peaker built-in headrest of 2nd Example of this invention. (A) The longitudinal cross-sectional view which shows the elastic member of Example 2 provided in the inside of a headrest exterior body, (b) is a longitudinal cross-sectional view which shows the state which the elastic member was pushed back and contracted.

  Hereinafter, first and second embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 6 show a first embodiment of the present invention, in which a headrest with a built-in bone conduction speaker according to the present invention is provided on an upper part of a driver's front seat.
In the figure, reference numeral 1 denotes a seat body 1 including a seat cushion and a seat back. Reference numeral 2 denotes a headrest of the present invention, which can be held and fixed on the back seat of the seat body 1 by a headrest stay 3 so that the vertical height can be adjusted. The headrest 2 is held and fixed to the seat body 1 via the headrest stay 3, and two left and right bone conduction speakers S are built in the front side of the headrest 2 in contact with the head H of the seat occupant M. ing.

The bone conduction speaker S is a device that converts an electrical signal of a sound source into air vibration while a normal speaker has a function of converting an electrical signal emitted from the sound source into solid vibration.
That is, the bone conduction speaker S converts the vibration of the sound source into a solid vibration for bone conduction and transmits it as a vocal cord vibration to the ear through the skull or the like, and since it is a conventionally used speaker, Detailed description is omitted.

  Since the bone conduction speaker S of the present invention is built in the front side of the headrest 2 in advance and is provided near the ear of the head H of the seat occupant M, bone conduction vibration can be transmitted efficiently. It is possible to transmit sound clearly even in an environment where noisy external noise is present.

Further, the headrest 2 shown in the present invention can be adjusted in the vertical height position with respect to the seat main body 1 by a vertical height adjusting mechanism (not shown) provided in the seat back of the seat main body 1. That is, it is possible to manually adjust the vertical height of the headrest 2 according to the height (sitting height) of the seat occupant M.
The seat occupant adjusts the position of the headrest 2 so that his / her head H hits a substantially middle height position of the headrest 2 according to his / her seating height. As shown in FIG. 2, the bone conduction speaker S is provided in a position separated in the left and right at the middle height position in the headrest 2 in advance so that the bone conduction speaker S can come into contact with the middle position of the head H of the seat occupant M. ing. When the bone conduction speaker S comes into contact with the head H, the vibration sound from the bone conduction speaker S can be transmitted clearly.

FIG. 3 is a perspective view showing the internal structure of the headrest exterior body 4 that covers the entire headrest 2 in a partially broken manner.
The headrest 2 is provided with a headrest exterior body 4 having a substantially rectangular parallelepiped bag shape, and at least an exterior body front surface 4a in contact with the head H of the seat occupant M is made of flexible synthetic leather or synthetic resin, H can be received softly. Inside the exterior body front surface 4a side, a front plate 5 made of a flexible synthetic resin or synthetic rubber is provided in parallel to the exterior body front surface 4a.
Further, in the space between the headrest exterior body 4 and the front plate 5, one bone conduction speaker S is provided on each of the left and right at a substantially middle height position of the headrest 2.

  A headrest stay 3 is provided inside the exterior body rear surface 4 b side of the headrest 2. Lower leg portions extending downward in the left and right direction of the headrest stay 3 protrude outside the headrest exterior body 4 through openings 13 provided at two lower portions of the headrest exterior body 4. The left and right lower leg portions of the headrest stay 3 are inserted into a bush 10 provided on the upper portion of the seat back of the seat body 1 and fixed to the seat back so that the height position can be adjusted by an unillustrated vertical height adjusting mechanism. On the other hand, the upper part of the headrest stay 3 is connected, and the overall shape seen from the front is an inverted U-shape.

On the inner side of the headrest stay 3 provided on the rear surface 4b side of the headrest exterior body 4 is a rigid rear plate 6 made of a rectangular plate-like hard resin or wood or the like by a fixture 14 such as a bolt. It is fixed to the headrest stay 3. The headrest stay 3 and the rear plate 6 have a function as a skeleton member of the headrest stay 3.
In other words, it has the role of holding the head safely by receiving the danger of the seat occupant's head impactingly flying backward due to a rear-end collision of the following vehicle or the like by the rigidity of the headrest stay 3 and the rear plate 6.

In the space formed by the front plate 5 provided inside the front surface 4a side of the headrest exterior body 4 and the rear plate 6 provided on the exterior body rear surface 4b side, a plurality of elastic members 8 are provided for the seat seater M. It is arranged in a grid pattern on the part where the head H hits. The expansion / contraction axis of each elastic member 8 is formed so as to be substantially orthogonal to each plane of the front plate 5 and the rear plate 6, and the front surface 4 a of the headrest exterior body 4 is the head of the seat seater M. It is configured to be able to move flexibly backward as part H moves backward.
A coil spring 9 constituting the elastic member 8 of Example 1 shown in FIG. 6 (a) is made of spring steel or a synthetic resin having elasticity, and is a cylindrical shape made of a soft cloth or a synthetic rubber material that can be stretched back and forth. Each is accommodated in the cap 12. On the front side of the rear plate 6, a recess 6a is formed at a position where the coil spring 9 is disposed. The recessed portion 6a is positioned and fixed to the rear plate 6 with the rear end portions of the coil spring 9 and the cap 12 inserted into the recessed portion 6a. With this configuration, the positions of the elastic members 8 on the rear plate 6 are fixed, and the coil springs 9 are housed in the caps 12, so that the adjacent elastic members 8 do not come into contact with each other during expansion and contraction. Each elastic member 8 can be freely expanded and contracted.

  FIG. 4 shows a state immediately after the seat occupant M sits on the seat body 1. At this time, the head H of the seat occupant M is not in contact with the headrest 2, the elastic member 8 provided in the headrest exterior body 4 is in a state of extending forward, and the front plate 5 is also an elastic member. 8, the front surface 4a of the headrest exterior body 4 is pushed forward and the state where the front surface 4a is swollen forward is maintained. Thereafter, the head H of the seat occupant M is held so as to come into contact with the front surface 4a of the headrest exterior body 4 as shown in FIG. At this time, the front member 4a, the bone conduction speaker S, and the front plate 5 of the headrest exterior body 4 are pushed rearward by the pressing force to the rear of the head H, and the elastic member is disposed at the position where the pressing force affects. Each 8 shrinks. At this time, since the coil spring 9 of the elastic member 8 is enclosed in the cap 12, the coil spring 9 is smoothly retracted without interfering with each other.

  When the head H of the seat occupant M is placed on the headrest 2 and comes into contact with the headrest 2, the head H is in a state of being entirely wrapped in the headrest 2. In this encased state, the bone conduction speaker S is in a positional relationship closer to the skull of the head H. In addition, noise from the outside is attenuated because the head H is entirely wrapped in the headrest 2, and the sound source vibration from the bone conduction speaker S is clearly transmitted to the skull to enjoy music and other sound information. be able to.

According to the headrest 2 incorporating the bone conduction speaker of the present invention having the above-described configuration, the seat occupant M such as a driver or a passenger can place the headrest stay 3 at a position where the height of the headrest 2 is suitable for his / her own seat height. The height position of the headrest 2 is adjusted via the head and fixed to the seat body 1. Thereafter, the seat occupant M places the head H on the headrest 2. The pressing force to the rear of the head H pushes the front surface 4 a through the headrest exterior body 4. This pressing force causes the coil spring 9 to contract according to the pressing force of the head H on the elastic member 8. As a result, the headrest 2 is deformed into a state of being recessed with the central portion of the pressing force as a center, and the head H of the seat occupant M is softly wrapped.
That is, the seat occupant M can achieve a state in which the bone conduction speaker S provided inside the headrest 2 is pressed against and contacted with the bone portion of the head H. In this state, the vibration of the sound source from the bone conduction speaker S is transmitted clearly, and music and other sound information can be enjoyed.

  On the other hand, when there is a rear-end collision caused by a following vehicle, the headrest 2 of the present invention is a seat seater in which the elastic member 8 and the headrest stay 3 and the plate 7 as a bone member holding the elastic member 8 from behind are rigid bodies. Since the head H of M can be firmly held, the head H of the seated person M can be prevented from whiplash.

FIG. 7 shows a second embodiment of the present invention, and members having the same functions as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. In the second embodiment, the headrest outer body 4 is formed of a flexible material made of synthetic leather or synthetic resin, as in the first embodiment, the outer body front surface 4a in contact with the head H of the seat occupant M. A front plate 5 made of a flexible synthetic resin, synthetic rubber, or the like is provided inside the headrest outer body 4 on the front surface 4a side. Bone conduction is provided in the space between the headrest outer body 4 and the front plate 5. One speaker S is provided on each of the left and right sides.
A cushion member 17 made of a flexible synthetic resin or the like is filled in the front and rear internal spaces of the headrest exterior body 4 in a state of filling the space.

  On the rear surface 4b side inside the headrest exterior body 4, a headrest stay 3 having an inverted U-shape as a whole is housed. The left and right lower leg portions extending downward of the headrest stay 3 protrude to the outside through an opening 13 provided in the lower portion of the headrest exterior body 4. The headrest 2 is fixed by a lower leg portion of the headrest stay 3 so that the height can be adjusted by a height adjusting mechanism (not shown) built in the seat body 1. The upper portion of the headrest stay 3 is connected, and a rigid rear plate 15 made of wood, thermosetting resin, or the like is attached to the headrest stay 3 by a fixture 14 such as a bolt on the inside of the inverted U-shape of the headrest stay 3. It is fixed to. The headrest stay 3 and the rear plate 15 have a function as a skeleton member of the headrest 2.

In the space between the front plate 5 inside the front surface 4a side of the headrest exterior body 4 and the rear plate 15 arranged inside the exterior body rear surface 4b side, a plurality of elastic members 8 are the head of the seat seater M. It is arranged in a grid pattern at the middle height position where H hits. The elastic axes of the elastic members 8 are provided so as to be substantially orthogonal to the planes of the front plate 5 and the rear plate 15. The front surface 4a of the headrest exterior body 4 can move back and forth flexibly in accordance with the pressure applied by the contact of the head H of the seat occupant M.
The elastic member 8 according to the second embodiment shown in FIGS. 7 and 8 is made of spring steel or elastic synthetic resin, and the coil spring 9 is housed in a cylindrical cap 16 made of elastic synthetic rubber. Has been. As shown in FIG. 8, the rear end portion of the coil spring 9 that contacts the rear plate 15 and the cap 16 formed with an expanded flange 16a at the rear end portion are fixed to the plane of the rear plate 15 with bolts, rivets or the like. Thus, each of the elastic members 8 is fixed to the rear plate 15. The coil springs 9 of the elastic members 8 adjacent to each other are individually housed in caps 16 that can be expanded and contracted back and forth, so that the elastic springs 8 can be independently expanded and contracted without the coil springs 9 being in direct contact with each other. Operation is possible.

According to the headrest 2 incorporating the bone conduction speaker of the second embodiment of the present invention having the above-described configuration, the seat occupant M places the head H on the headrest 2 so that the pressing force of the head H is the headrest exterior body. 4 and the cushion member 17 filled, the front plate 5 is pushed backward. The pressing force deflects the front plate 5 elastically biased forward by the elastic member 8 and contracts the coil spring 9 of the elastic member 8. The headrest 2 is recessed around the position pressed by the head H, and wraps the head H of the seated person M softly as a whole. The seat occupant M comes into contact with the bone conduction speaker S and the skull of the head H that are housed in the headrest exterior body 4. The sound source vibration from the bone conduction speaker S is clearly transmitted to the seat occupant M from the state in which the head H is entirely wrapped, and music and other sound information can be enjoyed clearly.
Further, since the elastic member 8 fixed to the cushion member 17 and the rear plate 15 is rich in elastic resilience, there is little deterioration of elasticity over time, and the headrest 2 is always in the front direction on the head side of the seat occupant. Can maintain a bulging state.
In addition, if the coil spring 9 which comprises the elastic member 8 is the elastic member 8 which can be expanded-contracted back and forth, you may change to a rubber spring or a synthetic resin spring, for example.

  Further, in the event of a sudden rear-end collision caused by a subsequent vehicle, the headrest 2 has an elastic member 8 and a headrest stay 3 which is a skeleton member that firmly holds the elastic member 8 from the rear and a rear plate 15 are seated. The head H of the person M is safely held and protected from whiplash.

  The present invention has been described as a headrest 2 with a bone conduction speaker built in for a vehicle seat headrest such as an automobile or an aircraft. You can also enjoy the device.

H head M seat occupant S bone conduction speaker 1 seat body 2 headrest 3 headrest stay 4 headrest exterior body 4a headrest exterior body front surface, 4b headrest exterior body rear surface 5 front plate 6 rear plate, 6a recess 8 elastic member 9 coil spring 10 Bush 12 Cap 13 Opening 14 Fixing device 15 Rear plate 16 Cap, 16a Flange 17 Cushion member

Claims (5)

At least the front surface having a bag shape is a headrest exterior body made of a flexible material, a front plate made of a flexible material disposed on the front side inside the headrest exterior body, and a space between the headrest exterior body and the front plate. A bone conduction speaker provided, a headrest stay arranged on the rear side inside the headrest exterior body, the upper part is connected, and the lower leg portion projects outside through the opening of the headrest exterior body, and inside the headrest stay A rear plate made of a rigid member disposed and fixed to the headrest stay by a fixture, and a telescopic axis disposed between the front plate and the rear plate and substantially perpendicular to the both plates, A headrest with a built-in bone conduction speaker, comprising a plurality of elastic members fixed to the front surface of the rear plate The bone conduction speaker built-in headrest according to claim 1, wherein a cushion member made of a flexible synthetic resin material is sealed inside the headrest exterior body. The bonerest speaker built-in headrest according to claim 1, wherein the elastic member includes a coil spring and a cap made of a cylindrical contractible material. 4. A concave portion is formed on a front side plane of the rear plate, and a rear end portion of the elastic member is inserted into the concave portion to fix the position of the elastic member to the rear plate. Headrest with built-in bone conduction speaker as described in 1. The bone conduction speaker built-in according to claim 1, 2 or 3, wherein a rear end portion of the cap of the elastic member is fixed to a front side plane of the rear plate, and the elastic member is fixed to the rear plate. Headrest.

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