JPH0311997Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a damper structure for a speaker.

As shown in FIG. 1, a conventional general corrugation damper 13 is obtained by press-molding cotton cloth impregnated with phenolic resin, etc., and its inner end is attached to a coil bobbin 11, and its outer end is attached to a frame 1.
They were glued to 4 respectively.

However, in such a damper structure, when the vibration system such as the voice coil is located near the center (when there is no signal), the spring constant becomes zero and the restoring force disappears, so the force-displacement curve (F -X) becomes non-linear, resulting in distortion in the speaker output sound pressure.

An object of the present invention is to provide a damper structure for a speaker that can overcome the drawbacks of the conventional ones with a simple structure.

Embodiments of the present invention will be described below in Figures 3 to 6.
This will be explained based on the diagram.

Figure 3 is a perspective view of the installed state, Figure 4 is Figure 3A
-A' line sectional view.

In the figure, 1 is a coil bobbin having a coil winding part 1a made of a thin wall part, 2 is a vibration system support part that is integrally connected to the upper end of the coil bobbin 1, and is oriented at an angle such that the neck part 5a of the diaphragm 5 is inscribed therein. , is shaped like a funnel. 3 is a damper, and a damper member 3a is connected from the outer end of the vibration system support section 2.
Each damper member 3a is formed by molding the required number of damper members 3a, six in the embodiment, to protrude radially.
A semicircular corrugation 3b is formed in the middle. Since these are integrally molded from engineering plastic, there is no risk of deformation or deterioration due to changes in temperature or humidity, unlike conventional dampers.

4 is a mounting member formed on the frame,
Attachment portions 4a and 4b for attaching the outer end portion 3c of the damper member 3a are formed with alternating steps. In the illustrated example, the mounting member 4 is formed into an annular shape and is formed by alternately providing concave portions and convex portions therein.

The inner ends of each of the damper members 3a are on the same plane, but the outer end mounting portions are attached to the mounting portion 4 as described above.
They are attached to a and 4b alternately with steps.
As a result, a mechanical bias is always applied to the vibration direction of the vibration system.

Theoretical equations for the force F in the vibration direction of this damper and the displacement X are shown below in comparison with a conventional single damper. (However, this is a formula that corresponds to a string damper.) K...spring constant in the direction of the center of the damper, a...width of the damper, b...preliminary displacement (bias amount) of the damper.In the case of a conventional single damper. Therefore, the displacement characteristics shown in FIG. 2 are obtained.

When mechanical bias is applied Therefore, the displacement characteristics shown in FIG. 5 are obtained.

Therefore, a mechanically biased damper as described above has good linearity over the entire amplitude, and the conventional drawbacks due to non-linearity of the damper can be improved.

In FIGS. 3 and 4, the coil bobbin 1, the vibration system support part 2, and the damper 3 are integrally molded from heat-resistant resin, but the damper member may be formed radially from an annular part attached to the bobbin, for example. Moreover, it goes without saying that the material is not limited to synthetic resin.

FIG. 6 shows another embodiment, in which the diaphragm 5 and the edge 6 are also integrally molded.

According to the damper structure of the speaker according to the present invention, the damper member extending radially from the vibration system support part and the mounting part for mounting each outer end of the damper member are formed with steps. Since the vibration system is configured to apply a mechanical bias to the vibration system by providing a step at the mounting position of each damper member, distortion due to non-linearity of the damper can be appropriately improved. moreover,
It has features such as excellent productivity due to its simple structure.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing a conventional damper structure, Figure 2 is an explanatory diagram showing the characteristics of the conventional damper structure,
3 to 6 show examples of the damper structure of the speaker according to the present invention, FIG. 3 is a perspective view, FIG. 4 is a sectional view, FIG. 5 is a characteristic diagram, and FIG. 6 is a sectional view. It is. 1: Coil bobbin, 2: Vibration system support part, 3: Damper, 3c: Outer end of damper, 4: Mounting member, 4a, 4b: Mounting part.

Claims (1)

[Scope of Claim for Utility Model Registration] In a speaker damper structure configured to apply a mechanical bias to the vibration system by providing a step in the mounting position of the damper member, vibrations connected integrally to the upper part of the coil bobbin. A system support member, a required number of damper members integrally molded to protrude radially outward from the upper edge of the vibration system support member, and a mounting portion for retrofitting the outer end of each damper member are arranged alternately in steps. A damper structure for a speaker, characterized in that the damper structure is comprised of a mounting member formed with a holder.