JPH07284195A - Passive radiator - Google Patents

Abstract

PURPOSE:To reduce the number of components and adhering processes and to obtain an inexpensive passive radiator by integrating a frame and a damper or the frame, the damper and a bobbin by a resin molding. CONSTITUTION:At the bottom surface of the frame 1 obtained by a resin molding, plural damper parts 1a extended bellows-like toward a center are formed by an integrated structure. A diaphragm 2 whose outer peripheral part is coupled with the peripheral part of this frame 1 and a bobbin 3 coupled so as to connect the center part of the rear surface of this diaphragm 2 and the damper parts 1a are provided. In this case, because the damper parts 1a are formed in a shape of bellows an are formed by the integrated structure with the frame 1, the damper parts 1a are capable of freely moving in a vertical direction, supporting this bobbin 3 in a state that the bobbin 3 is coupled at the center. As a result, the number of components composing a passive radiator becomes three, and further, an adhering process adhering the frame 1 and the dampers 1a becomes unnecessary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is incorporated into a speaker box or the like together with a general speaker among speakers used in various audio equipments, and the amplitude of the general speaker is used to make the amplitudes in opposite phases. The present invention relates to a passive radiator that does not have a magnetic circuit that is used.

[0002]

2. Description of the Related Art A conventional passive radiator will be described with reference to the drawings.

FIG. 5 shows the structure of a conventional passive radiator. In FIG. 5, 5 is a frame, 6 is a diaphragm whose outer peripheral portion is connected to the peripheral edge of the frame 5, and 7 is the center of the diaphragm 6. The bobbin 8 is connected to the damper 8, the damper 8 supports the bobbin 7, the reference numeral 9 is a dust cap connected to the upper surface of the center of the diaphragm 6, and the reference numeral 10 is connected to the outer periphery of the diaphragm 6 and the periphery of the frame 5. It is a gasket.

The conventional passive radiator configured as described above cannot operate alone because it has no magnetic circuit. Therefore, it is combined with a general speaker in a speaker box or the like (not shown) to drive the general speaker. It was used by being configured so as to oscillate in an opposite phase by utilizing its amplitude.

[0005]

However, in the above-mentioned conventional configuration, the frame 5, the diaphragm 6, the bobbin 7, the damper 8, the dust cap 9, and the gasket 10 are prepared as independent components, and these are bonded together. Because of the configuration, there are problems that not only the number of parts is large and the cost is high, but also a malfunction occurs due to a defect in the bonding work.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a passive radiator capable of reducing the number of parts, facilitating the assembling, and improving the quality performance at a low cost. Is.

[0007]

In order to solve this problem, the passive radiator of the present invention is a diaphragm in which a frame and a damper are integrally formed by resin molding and a bobbin is connected to the periphery of the frame. In addition to coupling the outer peripheral portion, the central portion of the diaphragm is coupled to the upper end of the bobbin.

[0008]

With this structure, not only can the number of parts constituting the passive radiator be reduced, but also the number of bonding points can be reduced to facilitate the bonding work, reduce malfunctions due to bonding defects, and reduce the cost of passive radiators. Can be provided.

[0009]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are a sectional view and a bottom view showing the structure of the passive radiator according to the embodiment, and in FIGS. 1 and 2, reference numeral 1 denotes a frame obtained by resin molding. A plurality of damper portions 1a extending in a bellows shape toward the center are integrally formed on the bottom surface. Reference numeral 2 denotes a diaphragm whose outer peripheral portion is joined to the peripheral edge of the frame 1, and 3 is a bobbin which is joined so as to connect the central portion of the rear surface of the diaphragm 2 and the damper portion 1a.

Further, since the damper portion 1a has a bellows-like shape and is formed integrally with the frame 1, the bobbin 3 can be freely moved in the vertical direction while supporting the bobbin 3 with the bobbin 3 being connected to the center thereof. Is something that can be done.

With the above-mentioned structure, the number of parts constituting the passive radiator becomes three, and the number of parts can be reduced, and further, the frame 1 and the damper 1 can be reduced.
Since the bonding step for bonding a is unnecessary, the number of parts and the bonding step can be reduced, so that it is possible to stably provide a high-quality passive radiator at low cost.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.

FIGS. 3 and 4 are a sectional view and a bottom view showing the structure of the passive radiator according to the embodiment, and in FIGS. 3 and 4, 4 is a frame obtained by resin molding. On the bottom surface, a plurality of damper portions 4a extending in a bellows shape toward the center and a cylindrical bobbin portion 4b to which the respective tip portions of the plurality of damper portions 4a are connected.
Are formed as an integral structure. Reference numeral 2 is a diaphragm whose outer peripheral portion is joined to the peripheral edge of the frame 4.

As described above, the passive radiator according to the present embodiment can be composed of only two kinds of parts, the frame 4 and the diaphragm 2, and it becomes possible to reduce the number of parts and the bonding process. It is possible to provide a low-cost and highly reliable passive radiator.

The resin material for forming the damper portion 1a or 4a integrally formed on the frame 1 or the frame 4 described in the first and second embodiments,
By using a resin containing rubber in a thermoplastic resin such as ABS resin, the elastic damper part 1a or 4a is obtained, and a passive radiator having mechanical strength with respect to amplitude and linear amplitude performance is realized. It becomes possible to do.

Although the first and second embodiments have been described with respect to the passive radiator having no magnetic circuit, the present invention is not limited to this and is also applied to a speaker having a magnetic circuit coupled thereto. It goes without saying that you can do it.

[0018]

As described above, in the passive radiator according to the present invention, the frame and the damper, or the frame, the damper and the bobbin are integrated by resin molding, so that the number of parts and the bonding process can be reduced. Therefore, it is possible to provide a low-cost passive radiator by reducing the operation failure due to the adhesion failure and improving the quality performance.

[Brief description of drawings]

FIG. 1 is a front sectional view showing the structure of a passive radiator according to a first embodiment of the present invention.

[Figure 2] Bottom view of the same

FIG. 3 is a front sectional view showing the structure of a passive radiator according to a second embodiment of the present invention.

[Figure 4] Bottom view of the same

FIG. 5 is a front sectional view showing the configuration of a conventional passive radiator.

[Explanation of symbols]

 1 frame 1a damper part 2 diaphragm 3 bobbin 4 frame 4a damper part 4b bobbin part

Claims (3)

[Claims] 1. A resin frame in which a damper is integrally formed, a diaphragm having an outer peripheral portion coupled to a peripheral edge of the frame, and a bobbin connecting a central portion of the diaphragm and a central portion of the damper. Become a passive radiator. 2. A passive radiator comprising a frame in which a damper and a bobbin are integrally formed, and a vibrating plate having an outer peripheral portion coupled to the peripheral edge of the frame and a central portion coupled to an upper end of the bobbin. 3. The passive radiator according to claim 1, wherein the resin material forming the damper portion contains rubber.