JP5549035B2 - Headrest with built-in speaker for bathtub - Google Patents

Description

  The present invention relates to a headrest with a built-in speaker for a bathtub, and particularly to a headrest with a built-in speaker for a bathtub that emits a sound with good performance and is not easily broken.

<Conventional example of enjoying music in the bathroom>
In order to enjoy music in the bathroom, in the conventional known example, a speaker is installed on the wall of the bathroom. However, according to this, it is inevitable to process the wall surface to embed the hook for installing the speaker in the wall surface, and the speaker overhanging in the bathroom not only detracts from the beauty but also may hit the head etc. with the speaker. there were.
There exists invention of patent document 1 as what cancels this.

<Invention of Patent Document 1>
The invention described in the cited document 1 aims to obtain a high quality music and ensure a comfortable bathing environment without installing a speaker on the wall surface of the bathroom.
The headrest described in Patent Document 1 has a bathtub head support for supporting a bather's head in a bathtub, two air vibration speakers at both ends, and two bone conduction speakers at a central position. Yes. A concave portion is formed at the center of the head support, and a cushion body formed of an elastic cushioning material such as polyurethane foam is fitted therein. When the bather puts his head on the cushion body, the weight of the head is reduced. Receiving and deforming, exhibiting a predetermined cushioning property and supporting the head. Two bone conduction speakers are disposed on the cushion body, and the bone conduction portion is disposed so as to be flush with the upper surface. In this state, the bone conduction speaker and the upper surface of the cushion body are covered with an elastic waterproof coating.
Therefore, when the occipital region of the head is placed on the cushion body, the occipital region comes into close contact with the bone conduction portion via the elastic waterproof coating so that sound can be heard by bone conduction.

JP 2007-228306 A

<Effect of the invention described in Patent Document 1>
According to the invention described in Patent Document 1, in addition to music reproduction from the air vibration type speaker to the ear, music reproduction based on bone conduction can be transmitted to the bather's head. High quality music can be given to bathers in a relaxed state with their head supported by a head support in the inside, and deeper comfort can be given by giving such high quality music Furthermore, according to the equipment such as the conventional body sonic, there is a concern that the vibration is transmitted outside the bathroom, but according to this, there is almost no risk of such an influence. There is a special effect that such inconvenience can be solved.

<Problems of Invention of Patent Document 1>
However, the invention described in Patent Document 1 requires two expensive bone conduction speakers in addition to the two air vibration speakers, and also requires a cushion body for attaching the bone conduction speakers. In addition, it is necessary to arrange the bone conduction part of the bone conduction speaker on the upper surface of the cushion body so that both of the bone conduction parts are exposed on the upper surface, and in addition to cover the upper surface of the bone conduction speaker and the cushion body. An elastic waterproof coating was also required. The mounting structure is complicated, the number of parts is increased, and the manufacturing cost is increased. Further, if the elastic waterproof coating is broken, the expensive bone conduction speaker may be broken.

  The present invention has been made to solve the above-mentioned problems, and without using an expensive bone-conduction speaker, high-quality music can be obtained just by using an air vibration speaker as in the invention described in Patent Document 1. The object of the present invention is to provide a headrest with a built-in speaker for a bathtub that can be heard and has the same external shape and dimensions as a conventional bathtub with a headrest.

In order to solve the above-described problems, the first invention of the present application relates to a headrest with a built-in speaker for a bathtub, and includes a stainless steel hollow cylindrical headrest main body and two air-vibration speakers built into both ends of the hollow cylinder of the headrest main body. In addition, the inner surface of the end of the hollow cylinder and the vicinity of the peripheral edge of the tip of the air vibration type speaker are sealed with a caulking material.
The second invention of the present application is characterized in that, in the headrest with built-in speaker for bathtubs of the first invention, the stainless steel hollow cylindrical headrest body has a curved shape in plan view and a straight shape in front view.
The third invention of the present application is characterized in that in the bathtub built-in speaker headrest of the second invention, the headrest body is covered with a urethane hollow cylindrical cover having a shape and size covering the stainless steel hollow cylindrical headrest body. .

According to the present invention, it is possible to listen to high-quality music using only an air vibration type speaker without using an expensive bone conduction type speaker.
Moreover, even if a bather changes the direction of the head with the back of the head placed on the headrest, the head can be stably supported.
In addition, the elasticity of the urethane resin can gently protect the back of the bather.

FIG. 1 is an exploded front view of a bathtub built-in speaker headrest according to the present invention. 2A and 2B are diagrams in which the headrest with a built-in speaker for a bathtub according to the present invention is attached to the edge of the bathtub. FIG. 2A is a front view, and FIG. FIG. 3 is a three-side view of a headrest main body as a main part constituting the headrest with built-in speaker for bathtubs according to the present invention, (A) is a top sectional view, (B) is a front view, and (C) is a side view. 4A and 4B are diagrams in which a speaker is attached to the headrest body, where FIG. 4A is a bottom view, FIG. 4B is a front view, and FIG. 4C is a side view. FIG. 5 is a three-side view of the cover used in the present invention, where (A) is a bottom view, (B) is a front view, and (C) is a side view. FIG. 6 is a front sectional view showing a state in which the speaker used in the present invention is housed in a stainless steel hollow cylindrical portion. FIG. 7 is a completed view of the present invention in which the cover of FIG. 5 is attached to the headrest body with the speaker of FIG. 4, in which (A) is a bottom view, (B) is a front view, and (C) is a side view. FIGS. 8A and 8B are enlarged views of a mounting portion in which the bathtub built-in headrest according to the present invention shown in FIG. 7 is attached to the edge of the bathtub. FIG. 8A is a front view, and FIG. FIG. 9 is a side view showing a state in which a bather is using the bathtub built-in headrest according to the present invention.

  Hereinafter, an example of an embodiment of a headrest with built-in speaker for bathtubs according to the present invention will be described with reference to the drawings.

<Configuration of headrest 10 with built-in speaker for bathtub>
In FIG. 1, reference numeral 10 denotes a headrest with built-in speaker for a bathtub according to the present invention (hereinafter referred to as “headrest”), a hollow cylindrical headrest body 11, a cover 12 covering the entire headrest body 11, and a headrest body 11. It is comprised with the air vibration type speaker (henceforth "speaker") 13 incorporated in the both ends of a hollow cylinder. The headrest 10 according to the present invention, which is composed of a headrest main body 11 covered with a cover 12 and incorporating a speaker 13, is attached to the upper edge of the bathtub B as shown in FIG. Bathtub B has an elliptical shape in which legs can be bathed, and headrest 10 is attached to a portion of the elliptical shape with a small radius of curvature, so that it supports the back of the bather who is relaxed and immersed in the bathtub. (See FIG. 9).
Hereinafter, the headrest body 11, the cover 12, and the speaker 13 will be described.

<Headrest body 11>
In FIG. 3, the headrest body 11 includes a stainless steel hollow cylindrical portion 11C, two bolts 11N which are welded to the hollow cylindrical portion 11C and are erected radially outward from the hollow cylindrical portion 11C, and a bolt 11N. And a mounting base 11T welded to the hollow cylindrical portion 11C.

<< Hollow cylindrical part 11C >>
The hollow cylindrical portion 11C is a long hollow cylinder obtained by bending a rectangular stainless steel plate. Since the outer shape is gently curved as shown in FIG. 3 (A), the bather W (FIG. 9) stably supports the head even when the head is turned and the head is turned. it can. Moreover, 11 C of hollow cylindrical parts are linear form like FIG.3 (B) by front view, and are made to attach stably to the edge of a horizontal bathtub in front view.
Here, as an example, the thickness of the plate of the hollow cylindrical portion 11C is 3 mm, the outer diameter of the hollow cylindrical portion 11C is 70 mm, the inner diameter is 64 mm, and the radius of curvature of the planar arc formed by the hollow cylindrical portion 11C is 360 mm.

<< Mount 11T >>
The mounting base 11T is an intermediate for attaching the hollow cylindrical portion 11C to the upper edge of the bathtub B (FIG. 2), and includes two curved long side portions, a curved long bottom portion, The hollow cylindrical portion 11C has a long and narrow trapezoidal shape made of a stainless steel metal plate, which is composed of both ends of a short length that closes the space defined by the two surfaces of the side surface and the bottom surface. The contact part is integrated by welding.
In FIG. 4 (A), bolt insertion holes 11B are opened at two locations at intervals in the length direction on the bottom surface of the mounting base 11T (the metal plate in contact with the bathtub), and the bolts 11N are inserted. In addition, a signal line through hole 11K is formed in the center between the two bolt insertion holes 11B, and the speaker signal line 13L passes therethrough.

<Cover 12>
The cover 12 is made of an elastic material that covers the entire headrest body 11H, and protects the bather's head from directly hitting the metal headrest body. As shown in FIG. 5, the outer shape of the cover 12 is a hollow cylinder with a slit provided with a slit 12 </ b> S in the length direction, and is gently the same as the headrest body 11 </ b> H (FIG. 3A) in plan view. It is curved and has a straight line shape as shown in FIG. The size of the hollow cylinder of the cover 12 is a size that can wrap the headrest body 11H without any gap. The cover 12 is preferably made of a material having a predetermined rigidity that always maintains the shape of the hollow cylinder with slits and elasticity that can expand the end portions 12E of the slits 12S from each other when the headrest body 11H is covered. For example, it can be carried out with polyurethane.
As one embodiment, the polyurethane hollow cylindrical cover 12 has a thickness of 5 mm, an outer diameter of 80 mm, an inner diameter of 70 mm, and a radius of curvature of a plan view arc formed by the hollow cylindrical portion 11C is 365 mm.

<Speaker 13>
As the speaker 13, a cone type speaker as shown in FIG. 6 can be used.
The cone type speaker 13 has a speaker frame 13F, and a magnetic circuit 13J is attached to the tip of the rear end of the speaker frame 13F, and the widened portion at the tip of the speaker frame 13F is attached to the speaker tip peripheral portion 13T. .
The magnetic circuit 13J is a donut-shaped permanent magnet composed of a yoke including a magnet M. A cylindrical shape that is a cylinder having a slightly smaller diameter than that of the cylindrical space corresponding to the hole of the donut-shaped permanent magnet 13J with a slight magnetic gap G. A voice coil bobbin 13V is arranged. The voice coil bobbin 13V is made of a plastic cylinder and is lightweight and easy to move. A coil 13W is wound on this cylinder to form a voice coil. The voice coil bobbin 13V is held at the center by dampers 13D at a plurality of locations in the circumferential direction attached to the speaker frame 13F, and coupled so as to fit into the magnetic gap G. A cone-shaped diaphragm 13C is connected to the tip of the voice coil bobbin 13V. A center cap 13S is attached so as to cover the diaphragm side surface of the voice coil bobbin 13V.
The diaphragm 13C is formed in a conical shape by processing resin or the like, and is easy to vibrate. The conical opening end at the tip of the diaphragm 13C is attached to the tip of the speaker frame 13F. A protective mesh 13M is stretched over the entire front surface of the diaphragm 13C. When the voice coil bobbin 13V moves back and forth, it will vibrate the diaphragm 13C, producing a sound.
Since the entire speaker 13 is drip-proof, it functions as a speaker even if water droplets adhere.
Further, the gap between the outside of the widened tip of the speaker frame 13F and the inside of the hollow cylindrical portion 11C is coated with a caulking material 13U such as urethane so that the gap is waterproofly sealed and fixed to the headrest body 11H.
In this manner, the magnetic circuit 13J, the voice coil bobbin 13V, and the diaphragm 13C are supported by the speaker frame 13F, and the voice coil bobbin 13V is movable in the front-rear direction (left and right in the figure) in FIG. 6 along the central axis of the speaker 13. It is supported by. In the cone type speaker, the diaphragm 13C, the voice coil bobbin 13V, the magnetic circuit 13J, and the speaker frame 13F are all housed in the hollow cylindrical portion 11C, and only the speaker tip peripheral portion 13T protrudes from the hollow cylindrical portion 11C and is fixed.

《Cone type speaker operation》
In the cone type speaker 13, the voice coil 13V is a lightweight coil in which a lead wire 13W is wound around a paper or plastic tube. When a voice signal flows through the lead wire 13W, the magnitude of the voice signal is determined according to "Fleming's left hand rule". Vibrates in the front-rear direction according to the (waveform). When the voice coil bobbin 13V vibrates back and forth, the diaphragm 13C connected to the voice coil bobbin 13V vibrates together with the vibration of the voice coil bobbin 13V, so that a sound having a waveform equal to the sound signal is generated from the speaker and hence from the hollow cylindrical portion 11C in the air. To be emitted.

FIG. 7 shows the headrest of the present invention completed by covering the headrest body 11 shown in FIG. 4 with the cover 12 shown in FIG. FIG. 8 shows a state in which the headrest 10 of the present invention of FIG. Since the upper edge of the bathtub B is rounded in a longitudinal sectional view, the bottom surface portion of the mounting base 11T is shaved so as to match the round.
Speakers 13 are built in both ends of the hollow cylinder of the headrest body 11, and only the speaker tip peripheral portion 13 </ b> T of the speaker 13 is exposed from the end of the hollow cylinder.
The signal line 13L of the speaker 13 is led out of the headrest body 11 from the through hole 11K. When the headrest body 11 is attached to the edge of the bathtub, the signal line 13L passes through the signal line through hole of the bathtub and below the edge of the bathtub. Derived and connected to a player outside the bathroom. Of course, it is also possible to incorporate a receiver in the headrest, send an audio signal to the headrest wirelessly, and make the signal line 13L of the speaker cordless.

  FIG. 9 is a side view showing a state where the bather is using the headrest 10 according to the present invention. Bolts 11N of the headrest body 11 are inserted through bolt insertion holes provided at the edge of the bathtub and fastened with nuts N. When the bather M brings the back of his head into contact with the headrest 10, music can be comfortably heard from the end of the stainless steel hollow cylinder constituting the headrest 10.

<< Function of Stainless Steel Hollow Cylinder of the Present Invention >>
The cone type speaker 13 has only the speaker tip peripheral edge portion 13T protruding from the hollow cylindrical portion 11C, and all other portions are housed and fixed in the stainless steel hollow cylinder of the headrest body 11H. It plays the role of an enclosure (box), and is particularly effective in the low-frequency reproduction ability, so that the bather M can listen to music comfortably.
Thus, according to the present invention, a cone-type speaker is embedded in a stainless steel hollow cylinder without using two special bone conduction speakers provided in the headrest speaker described in Patent Document 1, and the speaker tip By projecting only the peripheral portion from the hollow cylindrical portion and adhering the vicinity of the tip of the speaker to the hollow cylindrical portion, it was possible to obtain a voice comparable to the effect of the headrest speaker described in Patent Document 1.

<Summary>
As described above, according to the present invention, the air vibration type speaker 13 is housed inside the both ends of the stainless steel hollow cylinder of the headrest body 11, the speaker end and the stainless steel hollow cylinder are sealed with the caulking material, and the headrest body Even if the cover 11 made of urethane is simply covered with a urethane cover 12, the effect of the headrest speaker described in Patent Document 1 is far superior to that of the headrest speaker described in Patent Document 1, and the sound reproduction ability is superior to this. Because of its simple structure, it has the features that it is sturdy, not easily broken, and easy to maintain.
In addition, there is a feature that music can be listened to without having to attach a speaker to the wall surface of the bathroom, although it has substantially the same shape and size as a conventional bathtub with a headrest.

10 Headrest 11 with built-in speaker for bathtub according to the present invention Headrest main body 11B Bolt insertion hole 11C Hollow cylindrical portion 11K Through hole 11N Bolt 11T Mounting base 12 Cover 12S Slit 13 Air vibration type speaker 13C Diaphragm 13D Damper 13F Speaker frame 13J Magnetic circuit 13L Speaker signal line 13M Mesh 13S Center cap 13T Speaker tip periphery 13U Caulking material 13V Voice coil bobbin 13W Winding B Bathtub M Bathing person N Nut G Magnetic gap

Claims (3)

  A stainless steel hollow cylindrical headrest main body, two air vibration speakers built in both ends of the hollow cylinder of the headrest main body, an inner surface of the end of the hollow cylinder, and the vicinity of the tip periphery of the air vibration speaker Headrest with built-in speaker for bathtubs, which is sealed with caulking material.   The headrest body with a built-in speaker for a bathtub according to claim 1, wherein the stainless steel hollow cylindrical headrest body has a curved shape in a plan view and a linear shape in a front view.   3. The headrest with a built-in speaker for a bathtub according to claim 2, wherein the headrest body is covered with a urethane hollow cylindrical cover having a shape and size covering the headrest body made of stainless steel.

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