JP2516959B2 - Speaker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a speaker used in an audio device.

2. Description of the Related Art In recent years, audio equipment has become smaller and higher in performance, and loudspeakers are required to have a small diameter and thin shape. In addition, voice coils and terminals are directly connected with a flexible wire for workability and reliability. There is an increasing demand for direct lead type speakers.

The structure of a conventional direct lead type speaker will be described below with reference to the drawings. A speaker having a conventional structure is shown in FIG. In the figure, 1 is a plate with a pole piece, 2 is a ring-shaped magnet, 3 is a ring-shaped top plate, 4 is a voice coil, 5 is cone paper, 6 is a damper, 7 is a dust cap, 8 is a gasket, and 9 is flexible. A wire, 10 is a terminal, and 11 is a frame.

The operation of the conventional speaker having the above structure will be described below.

First, the audio signal amplified by the amplifier is
When it is applied to 10, it is transmitted to the voice coil 4 through the flexible wire 9. The voice coil 4 is fitted in a magnetic gap through which the magnetism generated by the magnet passes, and moves up and down vertically according to Fleming's law in response to an electric current. This motion is transmitted to the cone paper 5 and vibrates the air to generate a sound. Further, the flexible wire 9 changes its shape in response to the movement of the voice coil 4 to maintain the conductive state.

Problems to be Solved by the Invention In the speaker having the above structure, the flexible wire 9 changes its shape and transmits a signal at the time of amplitude, but when the amplitude is large or when the flexible wire 9 itself is in a resonance state, the amplitude is increased. There is a movement unrelated to. At that time, the flexible wire 9 passing through the central portion of the speaker, particularly the narrow portion between the cone paper 5 and the damper 6, comes into contact with the cone paper 5 and the damper 6, and an abnormal sound is generated. Further, in the thin speaker, the contact between the flexible wire 9 is unavoidable due to the narrow space between the cone paper 5 and the damper 6, and it is difficult to introduce the direct lead type.

The present invention eliminates the occurrence of abnormal sound by preventing the deformation and contact of the flexible wire, which is the above-mentioned drawback,
The present invention provides a speaker that enables direct lead of a thin speaker.

Means for Solving the Problems In order to solve the above problems, the speaker of the present invention has two flexible wires near the voice coil, which is a particularly narrow space between the cone paper and the damper of the flexible wire, made of urethane rubber from above and below.・ After being sandwiched by a cushion material formed of a material such as cloth, it is fixed to the back surface of the cone paper with a means such as double-sided tape or adhesive.

With the above configuration, the space between the cone paper and the damper is particularly narrow, and the flexible wire is easy to contact and is not stable at the time of vibration. Is generated only at a place having a wide range and an appropriate length, it is possible to perform a stable amplitude motion and prevent the generation of abnormal sound.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of use of a speaker in which a cushion material is attached on a flexible wire according to an embodiment of the present invention. In the figure, 1 is a plate with a pole piece, 2 is a ring-shaped magnet, 3 is a ring-shaped top plate, 4 is a voice coil, 5 is cone paper, 6 is a damper, 7 is a dust cap, 8 is a gasket, and 9 is flexible. Wire, 10 is terminal, 11 is frame, 12
Indicates a cushion material.

The configuration of the present invention will be described below. First, when the audio signal amplified by the amplitude device is applied to the terminal 10,
It is transmitted to the voice coil 4 through the flexible wire 9. The voice coil 4 is embedded in a magnetic gap, which is a passage for magnetism generated from the magnet, and vertically moves in accordance with Fleming's left-hand rule according to Fleming's left method. This motion is transmitted to the cone paper 5 and vibrates the air to generate a sound. The flexible wire 9 also moves in response to the movement of the voice coil 4, but since it is mounted on the cone paper 5 with the cushion material 12 interposed therebetween, the flexible wire 9 moves in the same manner as the cone paper 5 without causing deformation. Therefore, since there is no abnormal movement in a place sandwiched by the cushion material 12 (a narrow place between the cone paper and the damper), the cone paper 5 and the damper 6 are not brought into contact with each other and an abnormal sound is not generated.

Next, referring to FIG. 2, details of how to attach the cushion material 12 are shown. In the figure, 4 is a voice coil, 5 is cone paper, and 9
Is a flexible wire, 12 is a cushion material, and 13 is a double-sided tape / adhesive or adhesive. First voice coil 4
And the two flexible wires 9 are attached by a conventional attachment method, and then a cushion material 12 formed of urethane, rubber, cloth or the like is formed near the voice coil 4 of the flexible wire 9 so that the two flexible wires 9 are vertically arranged. A double-sided tape / adhesive or adhesive 13 is used together for integration. After that, when the cone paper 5 is attached during speaker assembly, the cushion material 12 is attached to the back surface of the cone paper 5 using a double-sided tape / adhesive or adhesive 13.

EFFECTS OF THE INVENTION As described above, according to the present invention, (1) In a narrow space between the cone paper and the damper, the two flexible wires are indirectly contacted with the cone paper by sandwiching the cushion material between them. While vibrating, it behaves the same as cone paper. Therefore, since the flexible wire itself does not move as in the conventional case, it does not come into contact with the cone paper or the damper and the abnormal noise is not generated.

(2) For thin speakers, the space between the cone paper and the damper is particularly small, so the cushioning material is sandwiched between the two, but the flexible wire itself does not directly contact the cone paper or the damper, causing abnormal noise. There is no.

(3) The location where the flexible wire is likely to come into contact is indirectly attached to the cone paper, and the movement of the flexible wire itself is performed after the cushion material (a method similar to an indirect lead type). Therefore, the flexible wire itself is weak in strength, so that the cost can be reduced. or,
Since the adjustment of the flexible wire is after the cushion material and there is no contact with the cone paper or the damper, the workability is improved and the quality is improved.

(4) Since the two flexible wires are integrated with the cushion material and then fixed to the cone paper, the fixing work becomes easy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a main part of a speaker according to an embodiment of the present invention, and FIGS. 2a, 2b and 2c are a top view, a side view and a section of a mounting portion of a cushion material according to the present invention. FIG. 3 and FIG. 3 are sectional views of a main part of a conventional speaker. 12 …… Cushion material.

Claims (1)

(57) [Claims] 1. In a speaker using a direct-drawing type voice coil in which a voice coil and a terminal are connected by a flexible wire, two flexible wires near the voice coil are sandwiched by a cushion material from above and below to be integrated. , A speaker made by fixing this cushion material to the back of cone paper.