JPS5837197Y2 - diaphragm - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a diaphragm for headphones and the like.

The diaphragm traditionally used in headphones, etc.
It consists of a diaphragm substrate such as a flexible plastic film on which a spiral conductive foil is printed and wired on its surface, and the diaphragm is placed in a magnetic field and a sound current is passed through the conductive foil to cause it to vibrate. was.

In this case, in order to increase efficiency, the diaphragm base is made as thin as possible, so the conductor foil part and the gap part do not vibrate as a whole due to the difference in strength, resulting in a significant deterioration in efficiency, especially when using a large force. , the sound quality was not good either.

The present invention has been made to eliminate the above-mentioned drawbacks, and will be described in detail below with reference to the drawings.

Figure 1A shows one embodiment of the conductor foil pattern of the diaphragm according to the present invention.Conductor foil 1 (shaded area in the figure)
is printed on the front surface of the diaphragm base 3, and the conductor foil 2 (the portion marked with a dot in the figure) is printed on the back surface of the diaphragm base 3.

1 shows a cross-sectional view of the diaphragm described above.

A conductor foil 2 having a conductor foil width narrower than the spacing between adjacent conductor foils of the conductor foils 1 on the front surface of the diaphragm base 1 is provided on the back side of the spacing between the conductor foils of the diaphragm base 1, and the spacing between the conductor foils 2 on the back side is The conductor foil 1 has a width narrower on the surface than the interval between the conductor foils 2.
It constitutes.

Therefore, the conductive foils are arranged so as to fill the gaps between them, and the strength and mass of each part of the diaphragm are almost uniform. Therefore, when an audio current is passed through each or one of the conductive foil coils formed on the front and back, , the diaphragm vibrates as a unit without producing divided vibrations as in the conventional case.

Since the diaphragm is reinforced in this way, it vibrates as a unit even when an adult is applying force, and can obtain high sound pressure with little distortion.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that a plurality of diaphragm substrates each having a conductive foil printed on one side may be laminated together as shown in FIG. 2, for example.

In this case, as described above, the conductor foils are arranged so as to fill the gaps, approach each other, and reinforce each other.

If the adhesive 4 is made of a rubber-based material with high viscosity, the internal loss can be increased and the sound quality can be improved.

In addition, a large number of conductor foils insulated from each other by the diaphragm base are formed into a cross-sectional shape in which the laminated portion of the base and the conductor foil, the laminated portion of the base, and the laminated portion of the conductor foil and the base are successively continued in the lateral direction. By doing so, the diaphragm is constructed in such a way that the gaps between them are filled.

However, when arranging a diaphragm in a narrow magnetic field, as mentioned above, the front and back sides of the base and the conductor foil fit into each other, making it possible to construct a diaphragm with a good cross-sectional conductor space factor, resulting in an efficient converter. can be configured.

Further, although the spiral pattern is approximately circular in FIG.

Also, depending on the arrangement of the magnetic poles, not only the spiral pattern described above, but also
For example, the present invention can be applied to various conductor foil patterns such as a crank shape.

It is clear from the above description that the present invention may be applied to a coil portion in a moving coil pickup that converts mechanical vibrations into electrical signals, for example.

As described above, according to the present invention, a diaphragm with high conversion efficiency can be provided, the mass and strength of each part of the diaphragm are approximately uniform, and the strength is increased by multiplexing, and the diaphragm can vibrate as a unit. Since the base body and the conductor layer, the conductor and the base layer are connected to each other, the internal loss increases and unnecessary split vibrations are less likely to occur.

[Brief explanation of drawings]

FIG. 1A shows one embodiment of the conductive foil pattern of the present invention, the opening in FIG. 1 is a cross-sectional view thereof, and FIG. 2 is a cross-sectional view showing another embodiment of the present invention. 3 is a diaphragm base, 1 is a front conductor foil, 2 is a back conductor foil, 4
is an adhesive.

Claims (1)

[Scope of utility model registration request] In a diaphragm having a plurality of conductor foils that are insulated from each other by a diaphragm base, a conductor foil that is narrower than the spacing between adjacent conductor foils on the base is provided on the front or back surface of the base, and a conductor foil is provided on the back surface of the conductor foil spacing on the front surface. A diaphragm characterized in that a conductor foil having a width narrower than the spacing is arranged in multiple layers on a front surface of the conductor foil spacing section on the back side, and a conductor foil having a width narrower than the spacing between the conductor foils is arranged on the front surface of the conductor foil spacing section on the back surface.