DIAPHRAGM STRUCTURE

A diaphragm structure including a suspension side edge and a central part is provided. The suspension side edge is connected to a periphery of the central part and surrounds the central part. The central part includes a main body part and a structural strengthening part, and the structural strengthening part is formed at a top end of the main body part.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of Taiwan application serial no. 110102440, filed on Jan. 22, 2021. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.

BACKGROUND

1. Technical Field

The disclosure relates to a diaphragm structure, and particularly to a diaphragm structure including a suspension side edge and a central part.

2. Description of Related Art

Speakers generally include a diaphragm, which is driven by the interaction of the magnetic field generated by the current coil and the magnet, which squeezes the air and converts the mechanical vibration into sound. The material, vibration location and geometric shape of the diaphragm have an effect on the frequency response of the sound in different frequency bands. However, nowadays, most diaphragms are made of a single material, which makes it difficult to meet the different rigidity requirements of each part of the diaphragm at the same time. For example, the central part of the diaphragm, or dome, is prone to distortion due to insufficient rigidity, resulting in uneven vibration, and thus the sound performance of the corresponding frequency band is affected.

SUMMARY

The disclosure provides a diaphragm structure, the central part of which has better structural rigidity.

A diaphragm structure of the disclosure includes a suspension side edge and a central part. The suspension side edge is connected to a periphery of the central part and surrounds the central part. The central part includes a main body part and a structural strengthening part, and the structural strengthening part is formed at a top end of the main body part.

In an embodiment of the disclosure, the main body part includes a first section and a second section. The second section is connected between the first section and the structural strengthening part, a surface of the central part in the first section is a convex arc surface, the surface in the second section is a concave arc surface, and the surface in the structure strengthening part is a convex arc surface.

In an embodiment of the disclosure, an amplitude turning point of the central part is located in the first section.

In an embodiment of the disclosure, a distance from a bottom end of the main body part of the central part to a top end of the structural strengthening part is larger than a distance from a bottom end of the suspension side edge to a top end of the suspension side edge.

In an embodiment of the disclosure, a central axis of the diaphragm passes through the structural strengthening part, and the structural strengthening part and the main body part are axisymmetric to the central axis.

In an embodiment of the disclosure, a material of the central part is different from a material of the suspension side edge.

In an embodiment of the disclosure, a rigidity of the central part is greater than a rigidity of the suspension side edge.

Based on the above, in the diaphragm structure of the disclosure, a structural strengthening part is formed at the top end of the central part, thereby increasing the structural rigidity of the central part. Accordingly, compared with conventional diaphragms, unexpected distortion during vibration is less likely to occur to the central part of the diaphragm structure of the disclosure, which can make the frequency response curve flatter and reduce the generation of troughs, thereby improving the sound output quality.

DESCRIPTION OF THE EMBODIMENTS

FIG. 1is a three-dimensional view of a diaphragm structure according to an embodiment of the disclosure.FIG. 2is a cross-sectional view of a diaphragm structure ofFIG. 1along line I-I. Referring toFIG. 1andFIG. 2, a diaphragm structure100of the present embodiment includes a suspension side edge110and a central part120. The suspension side edge110is connected to a periphery of the central part120and surrounds the central part120. The central part120includes a main body part122and a structural strengthening part124. The structural strengthening part124is formed at a top end of the main body part122so as to increase a structural rigidity of the central part120. Accordingly, compared with conventional diaphragms, unexpected distortion during vibration is less likely to occur to the central part120of the diaphragm structure100of the present embodiment, which can make the frequency response curve flatter and reduce the generation of troughs, thereby improving the sound output quality.

Further, in the present embodiment, a material of the central part120is different from a material of the suspension side edge110, for example. For example, the material of the central part120may be paper or other materials with higher rigidity, and the material of the suspension side edge110may be plastic or other materials with lower rigidity, such that the central part120has relatively large structural rigidity. In other embodiments, the central part120and the suspension side edge110may be made of other suitable materials, and the disclosure is not limited thereto.

FIG. 3is a partial enlarged view of a diaphragm structure ofFIG. 2. Please refer toFIG. 3. In the present embodiment, a surface S of the central part120has different curved surface properties in different sections thereof, such that the structural strengthening part124is formed on a top end of the central part120.

Specifically, the main body part122of the central part120includes a first section122aand a second section122b, where the second section122bis connected between the first section122aand the structural strengthening part124. The surface S of the central part120in the first section122ais a convex arc surface51, the surface S of the central part120in the second section122bis a concave arc surface S2, and the surface S of the central part120in the structural strengthening part124is a convex arc surface S3. In other words, a middle section (i.e. the second section122b) of the central part120between a top section (i.e., the section where the structural strengthening part124is located) and an outer section (i.e. the first section122a) is designed in a concave shape, so as to define the structural strengthening part124at the top end of the central part120.

Further, because the central part120increases the overall structural rigidity through the structural strengthening part124, when the central part120vibrates and becomes deformed, an amplitude turning point P will be farther away from the section where the structural strengthening part124is located and located in the outer section of the main body part122(i.e. the first section122a), so as to reduce a degree of irregular distortion when the central part120vibrates.

Referring toFIG. 3, in the present embodiment, a central axis A of the diaphragm structure100passes through the structural strengthening part124, and the structural strengthening part124and the main body part122are axisymmetric to the central axis A. That is, the diaphragm structure100is an axisymmetric structure, and the structural strengthening part124is formed at a geometric center of the diaphragm structure100. Moreover, as shown inFIG. 3, a distance H from a bottom end of the main body part122of the central part120to a top end of the structural strengthening part124is larger than a distance D from a bottom end of the suspension side edge110to a top end of the suspension side edge110.

In summary, in the diaphragm structure of the disclosure, a structural strengthening part is formed at the top end of the central part, thereby increasing the structural rigidity of the central part. Accordingly, compared with conventional diaphragms, unexpected distortion during vibration is less likely to occur to the central part of the diaphragm structure of the disclosure, which can make the frequency response curve flatter and reduce the generation of troughs, thereby improving the sound output quality.