JPS5818398Y2 - sound collection device - Google Patents

Description

[Detailed description of the invention] This invention relates to electronic equipment such as a stereo recording device with a built-in stereo microphone, and is designed to pick up sound from two different directions using a pair of left and right microphones built into the equipment housing. be.

Conventionally, there are two types of recording methods using built-in microphones in tape recorders and the like: monaural recording using one microphone and stereo recording using a pair of left and right microphones.

However, in both cases, the position of the microphone is fixed relative to the device housing, and as a result, its directivity range is constant, making it difficult to record with a sense of realism.

Therefore, the present invention proposes an electronic device such as a stereo recording device that is capable of collecting normal stereo sound using a pair of left and right microphones built into the electronic device, and is also capable of collecting sound in the left and right side directions.

An embodiment of the present invention will be described below with reference to the drawings.

In Figures 1 and 2, reference numeral 1 indicates a case that fits together the cubic panel surface of an electronic device such as a stereo recording device, and microphone grills 2 and 3 are located on the front side of the left and right sides corresponding to the built-in portion of the microphone unit. From part 2a s3a to side part 2b,
It is established under 3b.

On the rear edges of the side surfaces 2b and 3b of the microphone grills 2 and 3, pseudo auricle pieces 4 and 5 are attached to the side surfaces of the case 1 such that they can rise and fall freely, and are interlocked with the microphone unit via an interlocking mechanism that will be described later. It's shaking.

Although FIGS. 3 and 4 show the microphone unit and interlocking mechanism, these are arranged symmetrically with respect to the housing 1 and have the same configuration, so only the one arranged on the left side of the case 1 will be explained. do.

In the figure, 6 indicates a microphone unit, and a shielding piece 7 made of a plastic material such as flexible rubber is provided at the rear opening 6a.
is crimped and closed.

Reference numeral 8 indicates an interlocking mechanism, which consists of a support lever 9 that supports the microphone unit 6, an interlocking lever 10 that is integrally provided on the pseudo auricle piece 4, and a toggle spring 11. It is supported pivotably, and a long hole 13 is provided in the rear end in the longitudinal direction, and is engaged with a pin 14 protruding from the inner end of the interlocking lever 10.

On the other hand, the intermediate portion of the interlocking lever 10 is pivotally supported by a fixed shaft 15 so as to be perpendicular to the support lever 9, and the outer end thereof is bent and protrudes from a window hole 16 formed in the case 1, and the pseudo auricle piece 4 is integrally connected to.

A toggle spring 11 is elastically stretched between the bin 14 and the fixed bin 17, and when the pseudo auricle piece 4 is in the collapsed state (the third
In the state shown by the solid line in the figure), the directional axis of the microphone unit 6 is directed toward the front surface of the case 1, that is, toward the front surface 2a of the microphone grill 2, and the pseudo auricle piece 4 is in the upright state (the state shown by the imaginary line in Fig. 3). ), it is held in a state facing toward the side surface of the case 1, that is, toward the side surface 2b of the microphone grill 2.

Further, a directivity switching mechanism 18 is disposed behind the position where the microphone unit 6 is opposed to the front surface 2a of the microphone grill 2. When the shielding piece I comes into contact with
is configured to be in a through-hole state.

That is, the directivity switching mechanism 18 is, for example, as shown in FIG.
When the shielding piece 1 on the rear surface of the microphone unit 6 comes into contact, the thin tube 20 passes through the shielding piece 1 and an acoustic path is formed on the rear surface of the microphone unit 6.

Mr. Kono, the microphone unit 6 is the microphone grill 2
When facing the front surface 2a of the microphone unit 6, the directivity switching mechanism 18 located at the rear of the microphone unit 6 puts the shielding piece I in a through-hole state, and an acoustic passage is formed in the rear opening 6a of the microphone unit 6. As a result, the microphone unit 6 has directivity, and when the microphone unit 6 is opposed to the side surface 2b of the microphone grille 2, the shielding piece 7 of the rear opening 6a has the directivity switching mechanism 18.
The microphone unit 6 is closed so that it is spaced further apart.
becomes omnidirectional, and in this state, the Teha pseudo auricular piece 4 is erected, so that sound is collected as pinaural sound.

The microphone unit 6 interlocking mechanism 8 and directivity switching mechanism 18 configured as described above are arranged on the left side inside the right microphone grille 3 of the housing 1 in relation to the right pseudo auricle piece 5 as described above. Since both the pseudo auricle pieces 4 and 5 are laid down, both the microphone units 6 are positioned facing the front parts 2a and 3a of the microphone grill 293, and the directivity switching mechanism 18 This provides directivity and creates a stereo sound collection state, allowing stereo recording. In addition, when both pseudo auricular pieces 4 and 5 are erected, both microphone units 6 are connected to the side surfaces 2b and 3b of the microphone grills 2 and 3.
The pseudo pinna pieces 4 and 5 are positioned opposite to the directivity switching mechanism 18 and have omnidirectional properties, and both the pseudo pinna pieces 4 and 5 produce a pinaural sound effect and are in a pinaural sound collection state, allowing pinaural recording.

Note that the interlocking mechanism 8 and the directivity switching mechanism 18 are not limited to those shown in this embodiment. For example, as the directivity switching mechanism 18, the microphone unit 6 is connected to the pseudo auricle piece 4,
5 and side parts 2b and 3b of the microphone grills 2 and 3.
The microphone unit 6 may be configured to abut against the rear surface of the microphone unit 6 in a state where the microphone unit 6 is opposed to the microphone unit 6, thereby closing the mouth and making the microphone unit 6 non-directional.

As described above, according to the present invention, the direction of the pair of left and right microphones built into an electronic device such as a one-box stereo recording device can be varied in two directions with respect to the device case. It has effects such as being able to collect sound from the source and making optimal recordings depending on the recording situation.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an example of a stereo recording device to which the present invention is applied, Fig. 2 is a plan view of the same, Fig. 3 is an enlarged plan view of a portion of the same main part, and Fig. 4 is an example of a microphone unit. FIG. 3 is a partially cutaway plan view. In the figure, 1 is an equipment case, 2 and 3 are microphone grills, 6 is a microphone unit, and 9 is a support lever.

Claims (1)

[Scope of utility model registration request] A pair of pseudo auricles that can be switched to protrude from the housing, a pair of left and right microphone units built into the housing, and a switch that switches the directional characteristics of the microphone units in accordance with the switching of the pseudo auricles. A mechanism is provided,
A sound collection device in which the pair of microphone units can be switched to be non-directional when the pseudo auricle is protruding and directional in other states.