JPS5843349Y2 - dome type speaker - Google Patents

Description

[Detailed description of the invention] This invention is a dome that creates a passage between the sealed part at the back of the dome-shaped diaphragm and the outside, dampens the airflow in the passage, and smoothes the frequency response in the bass range. This is related to type speakers.

Conventionally, as shown in FIG. 1, a dome-shaped speaker has been constructed by attaching the outer periphery of a dome-shaped diaphragm 1 to the inner periphery upper surface of an annular plate 12 having a convex ring 4 formed on the outer periphery upper surface. A flat annular gasket 2 is pasted on the upper surface of the gasket 2, and the gasket 2 is crimped around the opening hole of the flat plate frame 14 attached with the convex ring 4, and the dome-shaped diaphragm 1
The voice coil 15 attached to the inner edge of the outer periphery of the dome portion of the plate 12. A closed space is formed at the rear of the diaphragm 1 by placing it at the center of the magnetic gap formed by the plate 12 and the center pole 16 of the magnetic circuit consisting of a center pole 16 and a magnet 17.

When a sound current is applied to the voice coil 15 to drive it up and down and cause the diaphragm 1 to vibrate in the vibration direction, the diaphragm 1
A sharp peak of resonance sharpness occurs in the bass range due to the effect of the sealed space at the back, and when used as a 2-way speaker with a bass speaker, a buildup occurs near the mid-to-high range, causing discomfort to the listener. There was a drawback of giving.

This invention was devised to eliminate the above drawbacks.
To explain the embodiment shown in the drawings, as shown in FIG. 2, the voice coil 15 attached to the inner edge of the outer periphery of the dome portion of the dome-shaped diaphragm 1 has an annular plate 5. Center pole 16. magnet 17
The plate 5 and center pole 1 of the magnetic circuit consisting of
It is placed at the center of the magnetic gap formed by 6.

The outer periphery of the diaphragm 1 is attached to the annular flat plate gasket 3 attached to the upper surface of the inner periphery of the plate 5, and the annular flat plate gasket 2 is attached to the upper surface of the diaphragm 1, which is attached using four convex rings. The inner edge of the flat plate frame 6 is pressed and held, and the gaskets 2 and 3 plates 5. An annular space 7 is formed by the convex ring 4 frame 6, and a plurality of holes 8 are bored in the upper frame 6 of the space 7 to communicate between the space 7 and the outside.
A plurality of holes 9 are bored in the space 7 and a damping material 11 such as felt is pasted on the upper surface of the hole 8 to connect the space 7 and the diaphragm 1.
It is a dome-shaped speaker that communicates with the rear part.

Since the present invention has the above-described structure, when a sound current is applied to the voice coil 15 to drive it up and down and cause the diaphragm 1 to vibrate in the vibration direction, the space 7 at the back of the diaphragm 1 is closed to the hole. 8. The hole 9 communicates with the outside, and air reciprocates through the damping material 11 to suppress the vibration of the diaphragm.The resonance sharpness is reduced near the lowest resonance frequency, and the frequency characteristics in the bass range are smoothed. When used as a speaker with a bass speaker, there is no excitement around the mid-to-high range,
It is possible to obtain sound quality that gives a sense of pleasure to the listener.

In the present invention, as shown in FIGS. 3 and 4, an annular gasket 13 having a plurality of holes 10 formed on its lower surface is attached between the upper surface of the inner periphery of the plate 12 and the outer periphery of the diaphragm 1. The same effect can be obtained by including a dome-shaped speaker in which a damping material 11 is embedded in and communication is established between the space 7 and the rear part of the diaphragm 1.

As described above, the present invention provides an air passage between the rear cavity part of the dome-shaped diaphragm 1 and the outside, and provides a damping material 11 in a part to suppress the vibration of the diaphragm 1, thereby suppressing the vibration in the low frequency range. This is a device that smooths out the frequency characteristics of the sound and has a remarkable effect on improving sound quality.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a conventional dome-shaped speaker, FIGS. 2 and 3 are configuration diagrams of the dome-shaped speaker of the present invention, and FIG. 4 is a plan view and a front view of a washer 13. 1 is a diaphragm, 2, 3.13 is a gasket, 4 is a convex ring, 5, 12 is a plate, 6, 14 is a frame, 7 is a space, 8, 9, 10 are holes, 11 is a damping material, 15 is the voice coil, 16 is the center pole, and 17 is the magnet.

Claims (1)

[Scope of utility model registration request] The outer periphery of the dome-shaped diaphragm 1 is sandwiched between ring-shaped gaskets 2.3, and a frame 6 is laminated on the inner periphery of the plate 5, which has a convex ring 4 formed upwardly on the outer periphery, and is attached by the ring 4.
In a dome-shaped speaker that is pressed and held at the inner edge of the
Gasket 2, 3° plate 5. Convex ring4. A hole 8, 9 or 10 is bored in the frame 6 and the plate 5 or gasket 3 of the annular space 7 formed by the frame 6, and a damping material 11 such as nonwoven fabric or felt is formed in the hole 9 or 10 of the plate 5 or gasket 3. A structure with