JPS6040072Y2 - passive radiator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a passive radiator used in a speaker system, and particularly relates to a mounting structure between a damper and a bobbin of a passive radiator.

A passive radiator is used to perform the function equivalent to a port on a bass reflex cabinet in a speaker system.It is a speaker with only a diaphragm without a magnetic circuit or voice coil, and it lowers the low-frequency characteristics of the speaker system. It can be made flat up to the frequency.

FIG. 1 shows a cross-sectional structure of such a passive radiator, in which, for example, a plane diaphragm 3 is provided via an edge 2 attached along the upper periphery of a frame 1. As shown in FIG.

This diaphragm 3 is further fixed to the upper open end of a cylindrical member 4 corresponding to a bobbin for a voice coil of a normal speaker, and a damper 5 is located near the lower open end of this bobbin 4.
The bobbin 4 and the diaphragm 3 are supported by being bonded to each other.

This damper 5 has a damper stand 6 fixed on the base of the interposed frame 1.

e) The hole diameter of the central opening of the damper 5 is set to be approximately equal to the outer diameter of the bobbin 4, and after the bobbin 4 is inserted and fitted into the central opening of the damper, the two are bonded together. .

Therefore, when bonding the bobbin and the damper, it is necessary to accurately position the diaphragm 3 in the height direction, so a jig or the like is currently used, which takes time. This also causes high costs.

An object of the present invention is to provide a structure of a passive radiator that can be easily assembled without requiring any jigs during assembly, and which can reduce costs.

The passive radiator of the present invention is provided with a damper having a hole that is approximately equal to or smaller than the opening area of the bobbin (cylindrical member) to which the diaphragm is attached, and the open end of the bobbin is provided on the upper surface along the periphery of the hole of the damper. It is characterized by that the part is mounted and fixed.

Further, by forming ribs around the holes in the damper, the bobbin and the damper can be positioned more accurately, and the strength of the damper can be improved, which is advantageous.

The present invention will be explained below using the drawings.

FIG. 2 is a sectional view showing an embodiment of the present invention, and parts equivalent to those in FIG. 1 are designated by the same reference numerals.

The diameter of the central hole of the damper member 5 is as shown in the figure.
As a result, the area of this hole is smaller than the opening area of the damper.

Therefore, if this damper 5 is fixed to the damper stand 6 at a predetermined position, the bobbin 4 can be inserted into the frame 1 from above so that the bobbin 4 and the center hole of the damper 5 are concentric. If the bobbin 4 is brought into contact with the upper surface of the damper 5 along the periphery of the hole, the height of the diaphragm 3 will be automatically determined.

Therefore, it is sufficient to fix both using a suitable adhesive or the like.

Of course, the diameter of the central hole of the damper 5 may be substantially the same as the inner diameter of the bobbin 4, that is, the circular area may be substantially equal.

FIG. 3 is a sectional view showing another embodiment of the present invention;
Parts equivalent to those in the figures are designated by the same reference numerals.

In this example, the damper 5 has a structure in which a rising rib 5a is provided around the hole.

Therefore, by inserting and fitting the lower end opening of the bobbin 4 and this rib 5a, there is an advantage that the damper 5 and the bobbin 4 are automatically installed concentrically, and the height of the diaphragm is also determined. .

Furthermore, the strength of the damper 5 will also increase.

According to the present invention, it is possible to easily assemble the device without using any jigs, thereby shortening manufacturing time and reducing costs.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional passive radiator, and FIGS. 2 and 3 are sectional views of embodiments of the present invention. Explanation of symbols of main parts, 3...Diaphragm, 4...
...Bobbin, 5...Damper.

Claims (2)

[Scope of utility model registration request] (1) A cylindrical member having a first end to which a diaphragm is attached, and a damper having a hole equal to or smaller than the opening area of the cylindrical member, and on the damper surface along the periphery of the hole. A passive radiator in which the other open end of the cylindrical member is placed and fixed on. (2) The passive radiator according to claim 1, wherein a rib is formed around the hole of the damper.