JP5660870B2 - Hearing aid transmitter coil - Google Patents

Description

  The present invention relates to a transmission coil for a hearing aid that generates an electromagnetic wave with respect to a telephone coil disposed inside a hook-type hearing aid.

Conventionally, in order to make it easy to listen to the voice of a telephone, a telephone coil that receives an electromagnetic wave (magnetic field) emitted from a speaker of a receiver and converts the received electromagnetic wave into an electric signal is provided in the hearing aid. The use of the telephone coil is not limited to a telephone, but can be used as a wireless reception antenna for electromagnetic waves, and the received electromagnetic waves can be heard with a hearing aid.

There is also a hearing aid transmission coil (hereinafter referred to as a transmission coil) that transmits electromagnetic waves to the telephone coil. For example, a transmission coil that can be easily obtained by a wearer and connected to a device that has an earphone output such as a radio or a television, is used as a necklace or hook that is used around a neck like a necklace. There is an ear hook type that is placed next to a type hearing aid and hooked to the ear.

In addition, there is a magnetic induction loop system as a transmission coil of a permanent and large-scale facility installed on a wide space floor such as a theater, an auditorium, or a gymnasium. In order to use this magnetic induction loop system, many telephone coils are arranged in the hearing aid so that the sensitivity in the vertical direction (vertical direction) becomes high when worn.

Patent Document 1 discloses a neck-hanging type that is used around a neck like a necklace.

In Patent Document 2, a loop antenna (transmission coil) is provided inside the shoulder belt body, a loop antenna formed in a loop shape that can be locked to the ear, and a wire shape to be locked to the ear. There has been disclosed a structure in which a locking body formed in a hook shape is provided and an antenna body is stretched on a side wall of a hearing aid so as to face an antenna or an induction coil (telephone coil) in the hearing aid.

Japanese Patent Laid-Open No. 10-22863 JP 2006-180448 A

However, in the neck-hanging type transmission coil described in Patent Document 1, since the distance from the ear-hinged hearing aid is far away, the intensity of electromagnetic waves is weakened, and it may be difficult for the wearer to hear.

In addition, the ear-shaped transmission coil described in Patent Document 2 has a slim shape to be attached to the side of the ear-shaped hearing aid, and the space of the transmission coil cannot be secured, so that the electromagnetic wave strength is weak. Depending on the position and orientation of the telephone coil, it may be difficult for the wearer to listen. Moreover, since the size of the transmission coil has to be increased in order to obtain sufficient electromagnetic wave intensity, it is provided below the ear-type hearing aid (below the ear), and the transmission coil portion is not visually attractive. In addition, because it moves, the feeling of wearing also gets worse.

Further, when the transmission coil is stretched on the side wall of the hearing aid, it is difficult to stretch the transmission coil because it must be matched with the position and direction of the telephone coil provided in the ear-hiding hearing aid. There is a high possibility that it cannot be attached with a small-sized hearing aid that is hidden in the pinna. Moreover, even when attached, the transmission coil that can ensure the strength of the electromagnetic wave is large in size and poor in appearance.

  The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a transmission coil for a hearing aid that can apply an electromagnetic wave having a desired intensity to a telephone coil. It is what.

In order to solve the above-mentioned problem, an invention according to claim 1 is a transmission coil for generating electromagnetic waves for a telephone coil of a hearing aid, wherein a coil wire is wound in parallel with a long side of a rectangular flat plate member , and the coil wire is wound . By bending a portion parallel to the short side of the flat plate member together with the coiled coil wire, it is formed into a substantially U shape or a substantially U shape, and an electric current is passed through the coil wire, so that a substantially U shape is obtained. Alternatively, the magnetic field lines in the region surrounded by the substantially U-shaped flat plate member are made dense .

The flat plate member can be formed of a soft magnetic material (high magnetic permeability). The coil wire wound around the flat plate member can be covered with a protective member.

According to the present invention, electromagnetic waves can be obtained efficiently and stably in a region inside a substantially U-shape or a substantially U-shape. Further, the structure is simple and the manufacture is easy.

If the flat plate member is formed of a soft magnetic material (having high magnetic permeability), the maximum strength of the electromagnetic wave can be increased as compared with the case of a non-magnetic material. In addition, if an electromagnetic wave having a predetermined intensity is generated, a necessary current can be reduced, which contributes to reduction of power consumption. Moreover, if it covers with a protection member, it can protect so that the coil wire wound around the flat plate member may not be damaged or disconnected by the handling of the transmission coil.

If attached to an ear-hearing type hearing aid, the attachment position can be freely adjusted, so that the wearer can easily adjust the telephone coil to a position with good sensitivity. Further, since the direction of the telephone coil (up and down, top and bottom) and the direction of the electromagnetic wave (magnetic field) by the transmitting coil are substantially the same, the electromagnetic wave (magnetic field) can be transmitted and received efficiently. Therefore, the wearer can listen stably.

BRIEF DESCRIPTION OF THE DRAWINGS It is manufacture explanatory drawing of the transmission coil for hearing aids concerning this invention, (a) is a top view of a flat plate member, (b) is a top view in the state which wound the coil wire around the flat plate member, (c) is a coil wire to a flat plate member (D) is a front view of a state where a flat plate member is bent, (e) is a plan view of the completed state, and (f) is a perspective view of the completed state. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining the operation of a hearing aid transmitter coil according to the present invention, in which (a) shows the direction of current flow and the direction of a magnetic field, and (b) is an enlarged view showing the direction of the magnetic field inside and outside the flat plate member in the upper section. (C) is an enlarged view showing the direction of the magnetic field inside and outside the flat plate member in the cross section on both sides, (d) is an enlarged view showing a region where a stable magnetic field is obtained as viewed from the direction of arrow F in (a). The perspective view which attached the transmission coil for hearing aids concerning this invention to the hearing aid type hearing aid

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the hearing aid transmitting coil 1 according to the present invention is formed by winding a coil wire 3 a plurality of times in parallel with a long side 2 a of a rectangular flat plate member 2, and short sides of the flat plate member 2 wound with the coil wire 3. Two portions 2c and 2d parallel to 2b are bent together with the coil wire 3 to form a substantially U-shape.

  The flat plate member 2 is preferably made of a soft magnetic material having a high magnetic permeability (for example, permalloy or silicon steel) and a material having an appropriate spring property. The coil wire 3 can be easily manufactured by using a self-bonding wire that is fused by heat or alcohol. The diameter and the number of turns of the coil wire 3 are determined by the required magnetic field strength.

The flat plate member 2 around which the coil wire 3 is wound can be bent into a substantially U shape, in addition to being bent into a substantially U shape. The bending shape of the flat plate member 2 around which the coil wire 3 is wound can be arbitrarily selected.

  The winding start and the winding end of the coil wire 3 are electrically connected to the lead wire 4 by soldering or the like at a desired position and fixed with an adhesive 5 or the like. For example, as shown in FIG. 1 (f), it is fixed near the center of the upper part 1a.

In addition, by covering the surface with a protective member such as a heat-shrinkable elastic body (for example, polyolefin-based or neoprene-based heat-shrinkable tube) or an elastic coating agent (for example, silicon-based / urethane-based), The coil wire 3 may be protected.

Further, the surface of the protective member may be roughened in order to improve the grip on the ear-mounted hearing aid. Moreover, not only the spring property of the flat plate member 2 but also the transmitting coil 1 can be attached to the ear-hearing type hearing aid by this protective member.

The operation of the transmission coil 1 for hearing aids according to the present invention configured as described above will be described. As shown in FIG. 2A, when a current I in the arrow direction is passed through the coil wire 3, a magnetic field H in the arrow direction is generated around the coil wire 3 wound around the flat plate member 2.

Then, the magnetic field H generated around the coil wire 3 wound around the upper portion 1a shown in FIG. 2B and the coil wire 3 wound around the side portions 1b and 1c shown in FIG. 2C are generated. The magnetic field H is in the same direction in the internal space 10 and the external space 11 of the flat plate member 2 formed in a substantially U-shape.

Further, by forming the flat plate member 2 around which the coil wire 3 is wound into a substantially U shape, the magnetic field lines become dense in the region 12 surrounded by the substantially U shape, and a magnetic field H having a stable strength is obtained. Can do. Therefore, it is possible to transmit and receive stable electromagnetic waves to the telephone coil built in the hearing aid.

FIG. 3 shows a state in which the transmission coil 1 is attached to the back of the ear-mounted hearing aid 20. The transmission coil 1 can be adjusted and attached so as to match the position with the best sensitivity (position of the telephone coil (not shown) built in the hearing aid 20). The transmission coil 1 is attached to both sides 1b and 1c with the hearing aid 20 sandwiched between the spring property of the flat plate member 2 and a protective member.

  Thus, the transmission coil 1 is generated from the transmission coil 1 by attaching the transmission coil 1 to the hearing aid 20 and connecting the plug (not shown) provided at the end of the lead wire 4 to the earphone output of a device such as a radio or television. The electromagnetic waves are received by a telephone coil (not shown) built in the hearing aid 20, and the wearer can comfortably listen to voice and music.

  ADVANTAGE OF THE INVENTION According to this invention, the transmission coil for hearing aids which generate | occur | produces the stable electromagnetic wave with desired intensity | strength with respect to the telephone coil arrange | positioned inside the hearing aid can be provided.

DESCRIPTION OF SYMBOLS 1 ... Hearing aid transmission coil, 1a ... Upper part, 1b, 1c ... Side part, 2 ... Flat plate member, 2a ... Long side, 2b ... Short side, 2c, 2d ... Site, 3 ... Coil wire, 4 ... Lead wire, 10 ... internal space, 11 ... external space, 12 ... region, H ... magnetic field, I ... current.

Claims (3)

A transmitting coil that generates electromagnetic waves for a telephone coil of a hearing aid. A coil wire is wound parallel to the long side of a rectangular flat plate member , and a portion parallel to the short side of the flat plate member wound with this coil wire is wound. A region surrounded by a substantially U-shaped or substantially U-shaped flat plate member by bending together with the coil wire, forming a substantially U-shape or a substantially U-shape , and passing a current through the coil wire. A transmitting coil for a hearing aid, characterized in that the magnetic field lines of the hearing aid are made dense . The transmission coil for hearing aids according to claim 1, wherein the flat plate member is formed of a soft magnetic material. The transmission coil for a hearing aid according to claim 1 or 2, wherein the coil wire wound around the flat plate member is covered with a protective member.

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