JPH079518Y2 - Portable voice reproduction and loudspeaker - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable voice reproducing / speaking device having a microphone and a speaker integrally, and more particularly to a mounting position of a microphone and a structure of a grip portion.

[0002]

2. Description of the Related Art Generally, as a so-called karaoke system (karaoke set), a sound reproducing device for reproducing a musical piece (instrumental) recorded on a sound recording medium such as a magnetic tape or an optical disk, and a singer. Of the sound input device, a mixed amplification device that amplifies the musical composition signal from the sound reproduction device and a sound signal from the microphone together, and a speaker that converts the amplified signal into a sound wave. The sound reproducing device and the mixing / amplifying device may be configured as a single unit (single housing device), but the microphone for picking up external sound and the speaker as a sound expanding unit are configured as separate independent devices. As the audio reproducing device, it is preferable that many songs can be continuously selected and can be reproduced with high quality, and it is preferable that the microphone is a small and lightweight cordless microphone that can follow the singing pose of the singer. Moreover, it is desired that the speaker as the sound expanding device has high output and high sound quality. Therefore, it is necessary to make each device a separate structure so that each device has a sufficient unique function.

By the way, among karaoke lovers, there is a desire to easily enjoy karaoke at any place. However, the conventional karaoke system as a whole requires a large installation space, and it is often difficult to move the karaoke system itself. That is, since the conventional karaoke system is large and weighs several kilograms or more and can be carried by an adult at last, the stationary type is generally the mainstream, which is very inconvenient or impossible to carry.
Even if the karaoke system can be moved, the cords and other interconnections and adjustment work will be forced at the new installation location.

Various configurations are imposed on the portable structure of the karaoke system, and it is essential to integrate the sound reproducing device, the microphone and the speaker and to reduce the size and weight. Of course, the karaoke function that can simultaneously expand the playing music reproduction sound and the voice of the singer must be exhibited at the same level. Conventionally, the one that can output the reproduced sound and the loud sound of such a performance song at the same time is
A microphone / cassette tape dual-use megaphone disclosed in No. 62-129898 is known. This microphone / cassette tape dual-use megaphone has a configuration in which a megaphone and a wire drawing microphone are added to a cassette tape player unit. Apart from the appearance, you can enjoy karaoke to a certain extent by this, but the protruding part of the megaphone is too large, it is difficult to possess so that you can reasonably follow the singing pose, and because it is a wire drawing microphone, The singer is forced to use both hands, so it is not suitable for playing karaoke.

On the other hand, to satisfy the above requirements,
The applicant of the present invention has realized a small and lightweight integrated karaoke set capable of reproducing sound from a loaded audio recording medium and expanding the sound while holding it with one hand and also expanding the singing sound of the owner. Japanese Patent Application No. 63-77497 (Japanese Patent Application No. 1-503808)
It was disclosed in. 4 and 5 are a perspective view and a side view showing the device disclosed in the same application. This device includes a speaker 21 housed in a lower portion of a vertically long case body 200.
0, the sound reproducing device 220 housed in the upper part of the case body 200, and the acoustic space 230 in the case body 200.
And a rod-shaped gripping portion 240 integrally connected to the back side of the case body 200, and a microphone 250 provided at the tip of the rod-shaped gripping portion 240. The inside of the lower portion of the rod-shaped grip portion 240 is used as a space for housing the battery 251. According to the audio reproduction and loudspeaker having such an arrangement, the grip portion 240 can be held by one hand, and since the storage position of the speaker 210 and the position of the microphone 250 are diagonally arranged, the entire structure is small. However, the distance between the two can be set long, and the howling phenomenon in which the enlarged sound from the speaker 210 returns to the microphone 250 via the external environment can be effectively suppressed.

[0006]

However, there are the following problems with the above-mentioned portable voice reproduction and loudspeaker.

That is, the cause of the howling phenomenon is that air vibration due to the speaker sound as described above returns to the microphone 250 through the external environment.
The material of the case main body 200 is excited by the vibration of the diaphragm (cone) of the speaker 210 and the speaker sound pressure, and this mechanical vibration is transmitted to the microphone 250 via the upper part (extension part 260) of the grip part 240. There are cases. The howling phenomenon caused by the former is caused by the speaker 2
If the distance between the microphone 10 and the microphone 250 is increased, the attenuation of the air vibration energy naturally reduces, but the howling phenomenon caused by the latter causes the case body 200,
Since the vibration energy is transmitted through the solid medium of the resin material or the metal material of the grip portion 240, even if the grip portion 240 is
Increasing the length of the top of the does not easily reduce it. The mechanical vibration is transmitted almost as it is to the microphone 250 at its end.

Therefore, the present invention solves the above-mentioned problems, and improves the arrangement structure under the structure of the voice reproducing device, the microphone, and the speaker integrated and reduced in size and weight, thereby improving the mechanical performance of the speaker sound. It is an object of the present invention to provide a portable voice reproduction and loudspeaker that suppresses the amount of dynamic vibration returned to a microphone.

[0009]

In order to solve the above-mentioned problems, in the present invention, the gripping part is not entirely connected and integrated with the back surface of the case body, but the connection part is provided at an upper position on the back surface of the case body. The structure employs a structure in which the back surface of the case main body, the connecting portion, and the gripping portion define a through space portion that has a margin for insertion at the hand end. The grip portion is preferably a grippable rod-shaped body extending substantially parallel to the case body. Further, a structure may be employed in which a connecting portion is also provided on the lower portion of the back surface of the case body.

[0010]

The significance of defining the through space portion by integrating the grip portion with the case body via the upper connecting portion is to limit the transmission path of mechanical vibration. Mechanical vibration is transmitted to the microphone provided in the extension corresponding to the upper part of the gripping part only through the local connecting part, and the connecting area between this connecting part and the gripping part is the same as that of the device shown in FIGS. 4 and 5. Small compared to the connecting area. Therefore, the mechanical vibration energy transmitted to the microphone can be suppressed. The position of the connecting portion may be located in the central portion of the case main body in order to narrow down the influence of mechanical vibration, but this makes the connecting portion an obstacle that is difficult to grip with one hand. The connecting part is located at the top,
With the structure in which the penetrating space portion into which the hand can be inserted is formed, it is easy to grasp, and moreover, it is possible to hang it by hanging the hand on the connecting portion in a state where one hand is inserted into the penetrating space portion. Not only can it be gripped, but it can also be carried with one hand, which can reduce the burden of possession of grip strength during intros during karaoke and during pauses between songs.

[0011]

Embodiments of the present invention will now be described with reference to the accompanying drawings.

The portable voice reproduction and loudspeaker 1 according to the embodiment has the external structure shown in FIG. This device 1, including all protrusions, has a height of 283 mm, a width of 97 mm, and a depth of 128.
It has a compact configuration with a maximum external dimension of mm and weighs 640 g including dry batteries. The device 1 is generally configured integrally with the device body 12, the grip 14, and the microphone 16. The device main body 12 is composed of an audio medium storage unit 120 and a speaker storage unit 130 of a tape cassette stored in a vertically long substantially rectangular parallelepiped case main body 12a. The speaker storage unit 130 is located below the audio medium storage unit 120. A tape deck or the like for audio reproduction is stored on the back side of the audio medium storage unit 120 as described later. Button tops 120 a, 120 b, 120 of push button switches are provided on the side surface of the case of the audio medium storage unit 120.
c, 120d and volume knobs 130a, 130b are projected. The button top 120a is a stop button top for stopping the feeding of the magnetic tape, the button top 120b is a fast-forward button top for fast-forwarding the magnetic tape, and the button top 120c is a rewind button top, a button top for rewinding the magnetic tape. 120d is a play button top for reproducing the audio signal recorded on the magnetic tape. The volume knob 130a is an echo (reverberation sound) of microphone sound.
Use the echo adjustment knob to adjust the volume knob 13
Reference numeral 0b is a tape / microphone volume adjustment knob for adjusting the balance between the microphone volume and the tape reproduction volume.

The grip portion 14 and the microphone portion 16 integrally formed with the grip portion 14 are formed in a substantially cylindrical shape, and the microphone portion 16 is located at the tip of the cylindrical extension portion 17. Further, leg portions 132a are provided on the left and right sides of the bottom surface of the apparatus main body 12 so as to project. An operation portion 18 is provided on the side surface of the cylindrical case between the grip portion 14 and the microphone portion 16. The operation unit 18 is provided with a knob 18a of a slide switch and volume dials 18b and 18c arranged above and below the knob 18a.
The knob 18a switches between the case where this device is used as a karaoke set and the case where the microphone sound is expanded and used only as a loudspeaker. Volume dial 18
Reference numeral b is for adjusting the balance between the voice volume and the performance volume when a voice multiple tape is used as the magnetic tape. The volume dial 18c adjusts the volume of microphone sound. The cylindrical grip portion 14 is provided with the upper and lower connecting portions 10a and 10b, and the device main body portion 12 is provided.
It is integrally connected to. Then, the back surface of the case body 12, the connecting portions 10a and 10b, and the grip portion 14 define a through space portion 15 having a margin that allows relatively free hand insertion.

This small and lightweight device 1 is used in the mode shown in FIG. That is, karaoke can be enjoyed by holding the device 1 while holding the holding portion 14 with one or both hands and singing toward the microphone portion 16. Since the device 1 is small and lightweight, the device 1 can be held in accordance with a singing pose as when holding a normal wireless microphone.

FIG. 3 is a side view showing the positional relationship between the speaker and the microphone section in the same apparatus. A small speaker 132 having a relatively strong magnet 132a is housed in the speaker housing 130 located below the device body 12. The miniaturization of the speaker 132 is due to the requirement of portability. In order to obtain a sufficient speaker volume when playing karaoke, it is necessary to use a strong magnet 132a while suppressing power consumption. The use of a strong magnet 132a in spite of being a small speaker 132 causes an increase in total weight by that amount, which may lead to a disadvantage of gripping with one hand or portability, but reducing the weight of other components or It is planned to reduce the weight of the entire device by reducing the number of parts. In addition, the speaker storage unit 130 is the device main body 12
Magnet 132a located at the bottom of the table and relatively heavy
The use of is advantageous in lowering the center of gravity of the vertically elongated device, and provides stationary stability or standing up / restoring property. It is possible to prevent damage to the device due to a fall.

The microphone section 16 has the above-mentioned cap 148, and a condenser microphone 148a is attached to the top of this cap 148. Direction of pressure receiving surface of condenser microphone 148a (directivity)
Is the direction of the axis of the microphone unit 16. Therefore, the directivity central axis of the unidirectional condenser microphone 148a and the directivity central axis of the speaker 132 are substantially orthogonal to each other. The position of the condenser microphone 148a is at the top of the device, the position of the speaker 132 is at the bottom of the device, and in this device, both are in diagonal positions and the distance between them is about 24 cm. The significance of such an arrangement relationship is to prevent howling. Speaker 132
The energy that the sound output from the microphone reaches the microphone 148a is reduced. And not only the attenuation effect due to the increase in the distance, but also because the audio reproducing device housed in the middle has heavy parts using a metal material such as a reproducing deck,
They thermally absorb mechanical vibrations well. Therefore, the effect more than the damping of mechanical vibration by simply increasing the distance is exerted.

Further, in this embodiment, the grip portion 14 is integrated with the case main body 12a through the upper connecting portion 10a,
A through space portion 15 is defined. Mechanical vibration that propagates using the speaker 132 as a vibration source takes a transmission path as shown by the broken line in FIG. The mechanical vibration is transmitted from the speaker 132 to the microphone 148a provided at the farthest position via the local connecting portions 10a and 10b, and the connecting area between the connecting portions 10a and 10b and the grip portion 14 is the fourth. It is smaller than the connection area of the device shown in the figure. In the apparatus shown in FIGS. 4 and 5, the grip portion 240 is entirely connected and integrated to the back surface of the case body 200, but in the present embodiment, the connecting area is reduced by the through space portion 15. Therefore, the mechanical vibration energy transmitted to the microphone can be suppressed by limiting the connection area. The position of the connecting portion may be at the center of the case main body 12a in order to narrow down the influence of mechanical vibration, but this makes the connecting portion an obstacle that is difficult to hold with one hand. The connecting portion 10a is located at the upper part, and the penetrating space portion 15 is insertable into the hand.
If the structure is formed, it is easy to grasp, and moreover, it is possible to hold it by hanging the hand on the connecting portion 10a with one hand inserted into the through space portion 15. Not only can it be gripped, but it can also be carried with one hand, which can reduce the burden of possession of grip strength during intros during karaoke and during pauses between songs. The significance of the existence of the upper connecting portion 10a is greater than that of the lower connecting portion 10b. Lower connection part 10b
Although it may be omitted, like the upper connecting portion 10a, it is provided for passing wiring.

In this device, in order to effectively prevent howling due to internal vibration, the extension portion 17
A speaker sound feedback prevention structure is adopted inside. That is, the cap 148 is inserted into the slightly reduced diameter end portion 152 a of the cylindrical extension portion 17.
A condenser microphone 148a is attached to the top of the. The partition plate 15 with a hole is integrally formed in the cylindrical end portion 152a. This partition plate 154
The metal disk with holes on the lower side (iron: SPCC, thickness 3m
m) The vibration absorbing plate 155 and the lower sound absorbing material 156, which is a relatively high-density natural sponge (hardness 10 degrees, thickness 8 mm or more), are stored. The sound absorbing material 156 has a high elasticity, and the vibration absorbing plate 1
The positioning function of 55 is also demonstrated. Also partition plate 15
On the upper side of 4, a relatively high density natural sponge (hardness 10 degrees,
An upper sound absorbing material 157 having a thickness of 17 mm is stored. The wiring connected to the condenser microphone 148a is the hole 154a of the partition plate and the hole 155a of the vibration absorbing plate 155.
Has been extended through. The return sound wave traveling in the direction of the arrow in FIG. 3 is first absorbed to some extent by the lower sound absorbing material 156.
Further, the vibration energy propagating through the housing is thermally absorbed by the vibration absorbing plate 155 having a large specific gravity. Holes 155a, 154
The return sound wave leaking via a is absorbed by the upper sound absorbing material 157. Therefore, howling due to return sound waves and vibrations inside the housing is prevented as much as possible.

[0019]

As described above, according to the present invention, the gripping portion is not entirely connected and integrated to the back surface of the case body, but is locally connected to the upper portion of the back surface of the case body through the locally limited connection portion. Since it is integrated and has a structure in which the through space portion is defined by the back surface of the case body, the connecting portion and the grip portion,
It has the following effects.

Since the gripping portion is integrated with the case main body through the upper connecting portion and the through space portion is defined, the transmission path of mechanical vibration can be narrowed down. Mechanical vibration is transmitted to the microphone provided in the extension corresponding to the upper part of the grip through the local connection, but the connection area between the connection and the grip is reduced. Therefore, the mechanical vibration energy transmitted to the microphone can be suppressed. In addition, since the path of mechanical vibration is limited, it is possible to take effective anti-vibration measures by incorporating a vibration absorber or the like immediately after that.

Since the connecting portion is located at the upper part and the through space portion into which the hand can be inserted is formed, it is easy to grip. Moreover, with one hand inserted into the through space, it is possible to hang it by hanging a hand on the connecting portion. Not only can it be gripped, but it can also be carried with one hand, which reduces the burden of holding grip force during intros during karaoke and during pauses between songs, improving operability and usability.

[Brief description of drawings]

FIG. 1 is a side view showing an external appearance of a portable voice reproducing and sound expanding device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a mode of use in which the device is held to enjoy karaoke or the like.

FIG. 3 is a partial cross-sectional side view showing a relationship between a built-in speaker and a microphone unit structure in the same device.

FIG. 4 is a perspective view showing a portable voice reproducing and expanding device previously disclosed by the applicant.

FIG. 5 is a side view showing a portable voice reproduction and sound expansion device previously disclosed by the applicant.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Portable voice reproduction and loudspeaker 12 Device body 12a Case body 14 Grip 15 Penetration space 16 Microphone 17 Extension 120 Audio medium storage 130 Speaker storage 132 Speaker 148a Microphone 150 Windshield sponge 152a End 154 With hole Partition plate 155 Vibration absorber 156 Lower sound absorbing material 157 Upper sound absorbing material

Claims (3)

[Scope of utility model registration request] 1. A case main body for accommodating a speaker and a sound reproducing device, a grip portion integrally connected at a rear position of the case main body via a connecting portion on an upper back surface of the case main body, and the grip portion. A penetrating space having an extension projecting upward from the position of the connecting portion from above and a microphone provided in the extending portion and defined by the case body, the connecting portion, and the gripping portion, into which a hand can be inserted. A portable voice reproduction and loudspeaker having a section. 2. The portable voice reproduction and loudspeaker device according to claim 1, wherein the grip portion is a grippable rod-shaped body extending substantially parallel to the case body. 3. The portable voice reproduction and loudspeaker device according to claim 1 or 2, further comprising a connecting portion on a lower rear surface of the case body.