JPS5840996A - Speaker device - Google Patents

Abstract

PURPOSE:To avoid the occurrence of a fault for a speaker, by providing a scale display plate to display the input signal which is applied to the speaker and then giving a warning to reduce an excessive input. CONSTITUTION:The signal given from a source such as a tuner, tape deck, a record player, etc. is amplified by a preamplifier or a main amplifier 14. This amplified signal is controlled by a speaker level controller 15, and the output of the controller 15 is supplied to a speaker 16 and a display filter 17. The output of the filter 17 is applied to a scale display plate 18, and the level of the input signal applied to the speaker 16 is displayed on the plate 18. The plate 18 is set at the front of the speaker 16 and connected to the upper edge of a support pipe 31 piercing through the center of a die casting cap 30 which is pressed into the center hole of a center pole 19. A lead wire 32 is stored into the pipe 31 to apply the signal given from the filter 17 to the plate 18. The plate 18 has a grid array of light emitting diodes arranged on the axes of frequency and sound pressure level in order to display the state of input.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker device equipped with a scale display plate.

A conventional speaker was constructed as shown in FIGS. 1 and 2.

That is, seven frames 6 are connected to a magnetic circuit 5 constructed by incorporating a ring-shaped magnet 3 and a ring-shaped upper plate 4 on a plate 2 having a center pole 1, and a gasket 7 is attached to the peripheral edge of this frame 6. At the same time, the periphery of the diaphragm 8 is bonded by adhesive or the like, and the voice coil 9 is coupled to the center of the diaphragm 8.
The middle part of the voice coil 9 is held by a damper 10, the lower part of the voice coil 9 is fitted into the magnetic gap 11 of the magnetic circuit 5 without eccentricity, and a dust cap 12 is attached to the upper surface of the center part of the diaphragm 8.

In such a speaker, if an excessive input is applied, the temperature of the voice coil 9 will rise abnormally, resulting in abnormal noise due to the coil coming apart, or malfunctions such as short circuits or disconnections due to carbonization of the coil's insulation coating. Was.

In order to solve these problems, improvements have been made to the insulation coating material of the voice coil 9, but recently ζ
Since the V addition force tends to increase, this was not a drastic countermeasure.

The present invention eliminates the above-mentioned conventional drawbacks, and provides a scale display board that displays the input signal applied to the speaker to give a warning to reduce excessive input to prevent speaker failure. It is an object of the present invention to provide a speaker device that prevents noise from occurring.

To achieve this objective, the present invention provides a tuner.

Input from sources such as tape decks and record players is amplified by the main amplifier, and the signal is adjusted by the speaker's level controller. Part of the signal is sent to the speaker, and part of the signal is sent to the display filter. A scale is displayed on the front of the speaker. The system is configured so that it is possible to check whether excessive input is being applied.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 8.

First, the schematic structure of the present invention will be explained with reference to FIG. 1
3 is a source such as a tuner, tape deck, record player, etc. The signal from this source 13 is amplified by an amplifier 14 such as a main amplifier 14, the amplified signal is adjusted by a level controller 16 for all speakers, and the output is sent to the speaker 16. and for display (supplied to the D filter 17, the output of this filter 17 is applied to the scale display plate 18, and the speaker 1
The magnitude of the input signal applied to the scale display plate 18 is shown in FIG.
This will be explained with reference to FIG.

The speaker 16 includes a plate 20. having a center pole 19. A frame 24 is connected to a magnetic circuit 23 constituted by a ring-shaped magnet 21 and a ring-shaped upper plate 22, and a peripheral edge of a diaphragm 26 is connected to a peripheral edge of a cono frame 240 together with a gasket 26. A voice coil 27 is coupled to the center of the diaphragm 26, the middle part of the voice coil 27 is held by a damper 28, and the lower part of the voice coil 27 is fitted into the magnetic gap 29 of the magnetic circuit 23 without eccentricity, and the diaphragm A dust cap 3o is attached to the upper surface of the central portion of the dust cap 26.

A scale display plate 18 is arranged in front of the speaker 16. This scale display plate 18 is press-fitted into the center hole of the center pole 19 and is connected to the upper end of a support vibe 31 that passes through the center of the dust cap 30. A lead wire 32 for applying voltage is housed therein.

Further, as shown in FIG. 6, the scale display plate 18 is arranged in a grid of light emitting diodes on the frequency and sound pressure level axes to display the input state applied to the speaker 16 for each frequency. Moreover, the allowable input is 10 dB, and if it is below that, it will light up with a blue light, and if it is over OdB, it will light up with a red light, and the hatched part is the part that is lit when it is currently playing. It shows.

If this ignition part raises OdB and lights up in red a lot, there is a risk that excessive input will be applied and the voice coil 27 will be destroyed. When input is applied, voice coil 2
7 indicates a safe condition.

In addition to diodes, display elements include liquid crystals, electroluminescence, and plasma display tubes.

A fluorescent display tube or the like may also be used.

The scale display plate 18 may also be configured to be attached to a mounting portion 33 from which a part of the frame 24 is protruded as shown in FIG. It is also possible to have a configuration in which the scale display plate 1B and the scale display board 1B are installed side by side.

Furthermore, it is also possible to provide a configuration in which one scale display plate 18 is provided in a 2-way or 3-way speaker system.

Since the speaker device of the present invention is configured as described above,
By displaying the magnitude of the input applied to the speaker on a scale display board, it is possible to immediately determine whether or not excessive input is being applied and damage the voice coil, and the input level can be adjusted to ensure the safety of the speaker. It is of great industrial value as it can be used for various purposes and has a long service life.

[Brief explanation of the drawing]

Figure 1 is a top view of a conventional speaker, Figure 2 is a cross-sectional view of the same,
FIG. 3 is a block diagram showing a schematic configuration of an embodiment of the speaker device of the present invention, FIG. 4 is a top view of the speaker device 1-power section, FIG. 6 is a cross-sectional view, and FIG. 6 is a scale display. Top view of the plate, No. 7
3 are top views of the speaker section of another embodiment. 13... Source, 14... Amplifier, 1
6... Level controller for speaker, 16.
...Speaker, 17 ...Filter, 18
...Scale display board, 23..., ...magnetic circuit,
24...Frame, 26...mark/diaphragm, 27
...Voice coil, 29...Magnetic gap, 31...Support pie, B, 32...
・Lead wire, 33...Mounting part, 34...Panel. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 2! &6Figure 315 80 G #/, $2. IIK I
K 201 FREQUENCY (Lun crystal 7 diagram f Fig. 8

Claims (1)

[Claims] A speaker level controller is connected to the sound source source via an amplifier, and the signal from this level controller is applied to the speaker and a scale display board placed close to the speaker via a filter. A speaker device that displays an input based on sound pressure frequency characteristics based on an allowable input. −