JPH11252228A - Structure of handset - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure to obtain a stable reception characteristic while leaving a shape of an ear piece of a handset as it is. SOLUTION: The structure for the handset is provided with a ceramic receiver 14 that sounds a received voice signal, a partition 13 that supports the ceramic receiver 14, a resonance space surrounded by the ceramic receiver 14 and the partition 13, a packing 15 that is inserted between the ceramic receiver 14 and the partition 13, and sounding holes 11 through which a received voice signal is sounded to the outside of the handset. The packing 15 is provided with a peripheral part 15a fixing the ceramic receiver 14 with the partition 13, and a top part 15b to obtain a gap 16 between the partition 13 and the ceramic receiver 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handset structure used for an intercom apparatus, and more particularly to a handset structure using a ceramic receiver.

[0002]

2. Description of the Related Art Conventionally, a receiver 1 of a handset used in an intercom apparatus has an earpiece 60 which hits an ear, a sound output hole 61 for a received sound, and a resonance which determines acoustic characteristics as shown in FIG. 2 (b). A space 65 for obtaining a resonance space, a partition 63 for obtaining a space for resonance, a ceramic receiver 64, and a packing 65 for preventing a gap from being formed between the partition 63 and the ceramic receiver 64.

The resonance space 62 has a structure as shown in FIG. 2A, in which the ceramic receiver 64 is fixed to the partition 63 and has the same shape as the outer periphery of the partition 63 so that the ceramic receiver can be in close contact. The packing 65 secures a space capacity.

In such a transmitter / receiver, the reception sound emitted from the ceramic receiver is converted into an acoustic resonance circuit composed of a resonance space 62 and a sound emission hole 61 of an earpiece, a sound emission hole 61 and a user. The reception characteristics are obtained by an acoustic resonance circuit composed of the outer ear and the space capacity between the earpieces. At this time, the space capacity formed between the resonance space 62 and the outer ear of the user and the earpiece is a capacitor (C), and the sound output hole 61 is an LC (inductance (L)).
Is constituted.

[0005]

In the structure of the conventional intercom handset, since the characteristics are determined by the ceramic receiver, the resonance space, and the sound emission hole, the earpiece portion is once formed with a mold. It is difficult to change the characteristics easily, and the receiving characteristics are the factors that make up the spatial capacity in the outer ear of the user's ear. There is a gap between the earpieces of the handset and the pressure in the outer ear is reduced, and the characteristics of the low frequency range are deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks of the related art, and has as its object to provide a handset structure for obtaining a stable receiving characteristic while keeping the shape of the earpiece of the handset. .

[0007]

To achieve the above object, a handset structure according to the present invention comprises a ceramic receiver for emitting a received voice, a partition for holding the ceramic receiver, and a ceramic receiver and a partition. A handset structure composed of a space for resonance, a packing inserted between the ceramic receiver and the partition wall, and a sound emission hole provided on the front of the space for resonance and emitting a received voice to the outside of the handset. The packing includes a peripheral portion for fixing the ceramic receiver to the partition and a vertex for obtaining a gap between the partition and the ceramic receiver.

According to the transmitter / receiver structure thus configured, the packing is formed so as to increase the space capacity of the resonance space surrounded by the ceramic receiver and the partition of the transmitter / receiver, so that the low frequency range is acoustically reduced in advance. By electrically correcting the generated low frequency range, the sound emitted from the sound output hole can be made less affected by the acoustic characteristics of the user's outer ear and earpiece.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a handset structure according to the present invention will be described in detail with reference to the drawings.

[0010] The handset structure according to the present invention can change the acoustic characteristics of a received sound without changing a molded product such as an earpiece. As shown in FIG. 1B, the handset is an earpiece 10 which hits an ear. A sound emitting hole 11 for receiving a sound, a resonance space 12 for determining acoustic characteristics, a partition 13 for obtaining a resonance space, and a packing 15 for inserting a ceramic receiver 14 into the partition 13. .

As shown in FIG. 1A, the packing 15 has a quadrangular shape, not a circular shape like the outer periphery of the partition 13, and has four peripheral portions 15a in contact with the outer periphery of the partition 13. The receiver 14 is fixed to the partition wall 13, and a gap 16 for increasing the space capacity of the resonance space 12 is obtained at four apexes 15 b of a square not in contact with the outer periphery.

An embodiment of the operation of the handset structure of the present invention will be described below.

As described above, the space in front of the ceramic receiver 14 acoustically serves as a capacitor C1, and the sound emission hole 11 of the earpiece 10 has an inductance L.
Can be treated as 1.

An LC resonance circuit is constituted by C1 and L1,
In addition, the inductance L1 and the space capacity C2 of the listener's outer ear
, A desired receiving characteristic is obtained in addition to the single characteristic of the ceramic receiver 14, but the resonance space is formed by the gaps 16 obtained at the four apexes 15b of the packing 15 in the resonance space. Twelve spatial capacities C1 are in an open state, and the sound pressure in the low frequency range decreases.

[0015] In addition, the output of the ceramic receiver is electrically compensated for the acoustically degraded low-frequency characteristics, thereby ensuring stable and good sound quality.

Since the space capacity of the resonance space 12 in the open state is sufficiently large with respect to the space capacity C2 of the outer ear of the listener, it is hard to be affected by the lowering of the low frequency caused by the presence or absence of the gap of the earpiece 10. There is no deterioration of sound quality due to the usage of the user.

[0017]

As is clear from the above description, according to the handset structure of the present invention, the sound quality of the received sound is not affected by the manner in which the receiver puts the handset on the ear, and the shape of the earpiece is changed. A stable acoustic characteristic can be obtained without any trouble.

[Brief description of the drawings]

FIG. 1A is a configuration diagram showing a handset structure according to the present invention. (B) is sectional drawing which shows some principal parts of the handset structure by this invention.

FIG. 2A is a configuration diagram showing a conventional handset structure. (B) is sectional drawing which shows some principal parts of the conventional handset structure.

[Explanation of symbols]

 11 ··· Sound emission hole 12 ··· Space for resonance 13 ··· Partition wall 14 ··· Ceramic receiver 15 ··· Packing 15a ··· Peripheral part 15b ··· Apex part 16 ··· Gap

Claims (1)

[Claims] A ceramic receiver for emitting a reception voice; a partition for holding the ceramic receiver; a resonance space surrounded by the ceramic receiver and the partition; A handset comprising: a packing (15) inserted between a receiver and the partition; and a sound emission hole (11) provided on the front surface of the resonance space and emitting the received voice to the outside of the handset. In the structure, the packing includes a peripheral portion (15a) for fixing the ceramic receiver between the partition wall and a vertex portion (15b) for obtaining a gap (16) between the partition wall and the ceramic receiver. A handset structure characterized by comprising: