JPS62193497A - Manufacture of honeycomb diaphragm - Google Patents

Abstract

PURPOSE:To prevent the notch of a core or a skin material from being occurred in the vicinity of an air through hole, and to solve a problem, such as that chips are remained in the air through hole, or that a work to eliminate them is required, by piercing the air through hole to the surface and the back of the skin material as a preceding working, and laminating and sticking the material on a honeycomb core. CONSTITUTION:Air through holes 6a and 6b are pierced through the surface and the back skin materials 3 and 4 as the preceding working respectively, and those are laminated and stuck on a honeycomb core 2 as a succeeding working. For this reason, inconvenience occurring when a piercing work is performed after a honeycomb diaphragm 1 is molded in a laminated state, in other words, the notch of the core 2 or the skin materials 3 and 4 in the vicinity of the air through hole 6, is not generated, and the problem such that the chips are remained in the air through hole 6, or that the work to eliminate the chips is required, is solved, and as a result, when the diaphragm is assembled in a speaker device, no air through hole 6 causes chattering phenomenon, thereby, a stable honeycomb diaphragm 1 having the air through holes (6a and 6b) can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a honeycomb diaphragm having air vent holes for improving air flow in a dust cap, for example, in a speaker device.

[Conventional technology]

Conventionally, as this type of honeycomb diaphragm, one having a structure as schematically shown in FIG. 3 is known. To briefly explain this, it consists of a honeycomb diaphragm plate indicated by the reference numeral 1 in the figure, a honeycomb core 2, a front surface attached to the front and back surfaces of the honeycomb core 2, a pair of skin materials 3.4, and a pair of skin materials 3.4. In the same figure (b)
As shown in the figure, an air vent hole 6 is formed by drilling with a drill blade 5 or the like.

Such a honeycomb diaphragm 1 is employed as a diaphragm in a speaker device as schematically shown in FIG. 4. Here, group number 11 in Figure 1 has a protrusion 11a at its center.
12 is an annular magnet stacked on the pole piece llh at an appropriate interval around the protrusion 11a, and an annular magnetic plate 13 is attached to the 1- side of the magnet 12 by appropriate means. Fixed by.

This constitutes a magnetic circuit 10 for the boiling coil 14 inserted into the gap inside the magnetic plate 13 at appropriate intervals.

15 is a voice coil bobbin formed by winding this voice coil 14, and this bobbin 15 is attached to a spider 17 with respect to the front frame 16 of the speaker fixed to the magnetic plate 13 etc. that constitute the magnetic circuit 10. and is supported by the IIT rift through the honeycomb diaphragm 1, and its voice coil 14 is positioned in the gap between the protrusion 11a of the pole piece 11 and the magnetic block L/-413. Insert is placed. In addition, 18 in Figure 1 is an edge for connecting the outer peripheral edge of the honeycomb diaphragm 1 to the )1/-m 16 side, and 19 is a dust bonded and fixed with adhesive so as to cover the center part of the honeycomb diaphragm 1. The cap is configured such that the air vent hole 6 is located at a position corresponding to the dust cap 19. This is because, without the air vent hole 6, the air flow inside the dust cap 19 would be poor, and a force that would make it difficult to vibrate would be applied to the honeycomb diaphragm 1, increasing the distortion of the vibration system. In particular, the speaker diaphragm for the low range with a large amplitude is
-Many of them are provided with air vent holes 6.

In a speaker installation with such a configuration,
The protrusion 11a of the pole piece 11! l: As is well known, a magnetic field is generated by a magnetic circuit in the air gap with the magnetic plate 13, and by passing a current through the voice coil 14 inserted in this magnetic air gap, it is driven according to Fleming's left-hand rule. A force is generated which causes the voice coil 14 to
vibrates, and this vibration is transmitted to the honeycomb diaphragm 1 side via the pobbin 15, and as the honeycomb diaphragm 1 vibrates, sound is radiated to the outside.

[Problem that the invention seeks to solve]

By the way, as mentioned above, the conventional honeycomb diaphragm l having the air vent holes 6 is shown in FIGS. 3(a), (b), (
As shown in c), first, the front and back skin materials 3.4 are adhered to the front and back surfaces of the honeycomb core 2 with adhesive applied thereto, and then they are assembled at a predetermined location, for example, into a speaker device. At that time, air vent holes 6 were formed in several locations within the dust cap using a drill blade 5 in post-processing.

However, in such a conventional manufacturing method, if the drill blade 5 becomes dull when drilling the air vent hole 6, the honeycomb core 2, the surface, etc. near the air vent hole 6 may be damaged.
Chips or the like may occur in the inner skin materials 3 and 4, or chips from the core 2 or skin materials 3.4 may remain in the air vent hole 6, requiring troublesome work to remove them. In particular, if these chips get into the cells of the honeycomb core 2, it is practically impossible to completely remove them, so when this honeycomb diaphragm 1 is incorporated into a speaker device to generate sound. In addition, there were problems such as causing chatter phenomena.

The present invention was made in view of the two consecutive spring sentiments, and eliminates the problems of conventional honeycomb core, front and back skin materials such as chips, and the remains of the chips in the air vent holes, and removes the chips. The object of the present invention is to provide a method for manufacturing an inexpensive honeycomb diaphragm in a cylinder that does not cause chatter or the like in a speaker device.

[Step-F for solving problems]

An uninvented method for manufacturing a honeycomb diaphragm is a honeycomb diaphragm formed of a two-cam core and front and back skin materials that are laminated and adhered to the front and back surfaces of the two-cam core, and air vent holes are formed at predetermined locations. diaphragm.

It is formed by making air vent holes in the front and back skin materials in advance, and then adhering these front and back skin materials to the front and back surfaces of the honeycomb core.

[Effect]

According to the present invention, air vent holes are formed in the front and back skin materials as a pre-processing, and these are laminated and attached to the honeycomb core. This eliminates problems such as chips remaining in the air vent hole and the need for removal work, and as a result, when it is inserted into the speaker device, the air vent The holes do not cause chatter phenomena.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

FIGS. 1(a) and 1(b) show an embodiment of the manufacturing method for the Hafu'', Rokuno, and vibration handling according to the present invention, and in these figures, the same or corresponding parts as in FIG. are given the same numbers and their explanations will be omitted.

Now, according to the present invention, the honeycomb core 2 and its surface,
It is formed by front and back skin materials 3.4 which are laminated and adhered to the back surface, and has air vent holes 6.4 at predetermined locations. To prepare the honeycomb diaphragm 1 in which the front and back skin materials 3 and 4 are perforated, air vent holes 6a and 6b are pre-processed in the front and back skin materials 3 and 4, and then these front and back skin materials 3 and 4 are It is characterized in that it is formed by adhering to the front and back surfaces of the core 2 via an adhesive.

According to the present invention, 1 front skin material and 3 back skin materials.
, 4, air vent hole 6a is pre-processed.

6b, and these are laminated and attached to the honeycomb core 2 as post-processing, so there is a problem when drilling the holes after forming the honeycomb diaphragm 1 in a laminated state as in the conventional method. That is, the core 2 and the skin materials 3 and 4 near the air vent hole 6 are not chipped, thereby eliminating problems such as chips remaining in the air vent hole 6 and the need for removal work. As a result, when this is incorporated into a speaker device, the air vent hole 6 (6a
, 6b) can be manufactured.

Here, the air vent holes 6a and 6b according to the present invention are drilled only in the front and back skin materials 3.4, and no special hole drilling work is performed on the honeycomb core 2. It will be easily understood that a large number of cells are bored through the hole 2, through which air can flow, and a machine part serving as an air vent can be obtained.

Further, such a honeycomb diaphragm l is assembled into a speaker device in a state as shown in FIG. 2, but this is the same as that shown in FIG. 4 described above, and a detailed explanation thereof will be omitted.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape and structure of each part including the shape of the honeycomb diaphragm 1 5 may be modified and changed as necessary. .

〔Effect of the invention〕

As explained below, according to the method for manufacturing a honeycomb diaphragm according to the present invention, the honeycomb diaphragm is formed of a honeycomb core and front and back skin materials laminated and attached to the front and back surfaces of the honeycomb core, and air is injected into predetermined portions of the honeycomb core. A honeycomb diaphragm with punched holes,
Air vent holes are drilled in the front and back skin materials as a pre-processing process, and then these front and back skin materials are used as the front and back skins of the honeycomb core.
Since it is formed by adhering it to the back side, there is no chipping of the core or skin material near the air vent hole, which is the case with conventional methods, even though it is inside the cylinder and is an inexpensive method. There is no problem of air remaining in the hole or the need to remove it, and as a result, when this is incorporated into a speaker device, for example, there is no problem of chatter occurring due to the air vent hole. It has various excellent effects such as being able to easily form a stable honeycomb and diaphragm.

[Brief explanation of drawings]

FIGS. 1(a) and (b) are manufacturing process diagrams showing an embodiment of the method for manufacturing a bar cam diaphragm according to the present invention, and FIG. 2 is a schematic cross-sectional view of a speaker device incorporating the honeycomb diaphragm. 3(a), 3(b), and 3(c) are manufacturing process diagrams showing a conventional example, and FIG. 4 is a schematic sectional view of a speaker device incorporating a conventional honeycomb diaphragm. l...honeycomb diaphragm, 2...honeycomb core,
3, 4 * * @e Front and back skin materials, 6a. 6b (6) --- Air vent hole. Agent Masuo Oiwa Figure 1 Figure 2 Figure 3 Figure 4 Figure 1

Claims (1)

[Claims] A method for manufacturing a honeycomb diaphragm formed of a honeycomb core and front and back skin materials laminated and attached to the front and back surfaces thereof, and having air vent holes bored at predetermined locations, the method comprising: A method for manufacturing a honeycomb diaphragm, characterized in that air vent holes are drilled in advance in a back skin material, and then these front and back skin materials are adhered to the front and back surfaces of a honeycomb core.