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JPS5642223

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DESCRIPTION JPS5642223
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a vibration
mechanism used in a bone conduction receiver according to an embodiment of the present
invention, and FIG. 2 is a perspective view of a bone conduction receiver according to an
embodiment of the present invention, FIG. 3 is a sectional view of the same. 1 и и и Outer case, 2 и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и diaphragm, 6 ' и и и и и и и и и и и и и и и и и и и и и и и
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и Plate adjustment screw.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bone conduction
type receiver, and in particular, a vibration as it is mounted on a bone conduction type receiver
to be used by being attached to the pinna, by inserting an ear pin like an earring. The purpose is
3 to ensure that the length of the gap formed between the board and the pole piece does not
change. и Lp 81! An embodiment of the present invention will be described below with reference
to the drawings. 1-0: и Fig. 1 is a cross-sectional view showing the structure of the vibration
mechanism ? 2 ?-232-constituting the bone conduction receiver of the present invention,
which is basically the same as the structure of a conventional bone conduction type vibrator . In
the figure, 1 is an outer case, 2 is a magnet, 3 is a pole piece, 4 is a coil, 5 is a diaphragm, 6 is a
vibration transmission rod, and 7 is a contact plate. Next, the operation of this vibrator will be
described. When an electrical signal corresponding to voice is applied to the coil 4, the magnetic
flux of the magnetic circuit formed by the magnet 2, the pole piece 3 and the diaphragm 5
changes in accordance with the applied electrical signal, and as a result the diaphragm 5
Vibrates. Since the contact plate 7 is connected to the diaphragm via the vibration transmission
rod 6, the contact plate 7 mechanically vibrates in accordance with the electrical signal. As
described later, since the contact plate 7 is operated in contact with the living tissue to transmit
the mechanical vibration to the living tissue, the diaphragm 5 is designed to have sufficient
strength. The present invention relates to means for transmitting mechanical vibration to a part
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of the pinna by using a vibration mechanism as shown in FIG. 1, and a specific configuration
example thereof will be described below. FIG. 2 is a perspective view of an earring-type bone 3.7receiver according to an embodiment of the present invention, and FIG. 3 is a cross-sectional
view. 1 to 7 constitute the vibration mechanism similar to that of FIG. 1 and are respectively
similar to 1 to 7 of FIG. Reference numeral 8 is a pressing plate mounting arm, 9 is a pressing
plate, and 10 is a pressing plate adjustment screw. This bone conduction receiver is used by
being attached to a part of the auricle in the same manner as the earring, so that a part of the
auricle is pinched by the contact plate 7 and the holding plate 9, and the holding plate adjusting
screw 10 is By pressing, the pressure plate 9 firmly holds the pinna together with the contact
plate to fix the bone conduction receiver to the pinna. As described above, when the electrical
signal is applied to the coil, the contact plate 14 vibrates. This vibration is transmitted to the
auricular cartilage tissue which is interposed between the contact plate 14 and the holding plate
16 to perceive a sound by bone conduction. An important point that influences the
characteristics of the bone conduction type receiver is a gear knob formed between the
diaphragm 12 and the pole piece 10. This gap is usually made so as to be kept as easily as' 0.060.2, and even if external pressure is applied to the contact plate 14 to attach it to the auricle,
even if the pressure is applied to the contact plate 14 & i 4-J. It is desirable that the length of the
gap be kept constant.
If the length of the gear knob changes due to the external pressure on the contact plate 14, the
characteristics of the vibration mechanism change, and in an extreme case, the gap becomes zero
and the diaphragm 12 contacts the pole piece 1o. May not work. In the present invention, the
length of the gear knob does not essentially change even if the bone conduction receiver is fixed
to the pinna by pinching the pinna between the contact plate 14 and the presser plate 16. и и и 1.
????? ??? I will explain in detail the 'sheep' on the 3rd stem. The presser plate 9 and the
presser plate adjusting screw 1 o are provided at positions facing the contact plate 7 of the
presser plate mounting arm 8. Since the holding plate mounting arm 8 is fixed to the vibration
transmitting rod 6 together with the contact plate 7, the holding pin is held between the contact
plate and the holding plate 9 and the holding plate adjusting screw 1o is adjusted to compress
the pin and contact plate No force is applied between the diaphragm 12 and the pole piece 3
forming the gap, so the length of the gap does not change. Therefore, the vibration characteristic
does not change. The bone conduction handsets 5 иии can be attached to the pinna. If the holding
plate mounting arm 8 is not fixed to the vibration transmission rod 6 together with the contact
plate 7 but fixed to the outer case 1, the auricle is held between the contact plate and the holding
plate with the holding plate adjustment screw. When the is fixed, the force applied between the
contact plate and the pressure plate is also applied as it is between the diaphragm and the pole
piece, and as a result, the length of the gap changes, and in the extreme case, the diaphragm and
the pole piece May not work due to contact. On the other hand, in the structure of the present
invention, stable characteristics can be obtained regardless of attachment to the pinna.
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