JP3456131B2 - Speaker - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker used for various kinds of audio equipment. 2. Description of the Related Art A conventional loudspeaker will be described with reference to FIGS. FIG. 4 is a top view of a conventional speaker having a slender structure, FIG. 5 is a side sectional view in the same long diameter direction, and FIG. 6 is a side sectional view in the same short diameter direction. According to FIG. 1, reference numeral 1e denotes an elongated diaphragm for generating air vibration, and the outer peripheral portion of the diaphragm 1e is held by a frame 11e via an edge 3e. A voice coil bobbin 6e is fixed to an intermediate portion of the diaphragm 1e, and the coil bobbin 6e is supported by a frame 11e via a damper 4 so as to be able to vibrate. On the other hand, a magnetic circuit 26 comprising an upper plate 8e, a magnet 9e, and a lower plate 10e is provided in a central recess of the frame 11e, and a voice coil wound around a voice coil bobbin 6e is provided in a magnetic gap of the magnetic circuit 26. The voice coil bobbin 6e is moved by a piston by the drive current flowing through the wire loop, and the diaphragm 1e coupled to the voice coil bobbin 6e vibrates to emit sound waves. FIG. 7 is a force / displacement characteristic diagram of the damper 4. [0008] However, in the above-mentioned speaker, it is necessary to: Since the damper 4 is made of a cloth material, the weight is heavy and the sound pressure is reduced, and the surface resonance easily occurs at the time of the amplitude of the diaphragm 1e. And the sound pressure is degraded. 2. It is necessary to reduce both the radius of curvature and the width of the damper 4 so as to fit within the frame 11e. As a result, the stiffness of the vibration system increases, the minimum frequency f0 increases, and it becomes difficult to reproduce the low-tone range. There was a problem that. The present invention has been made to solve the above-mentioned problem, and has a slender structure, in which split resonance hardly occurs, and a flat frequency characteristic is obtained. It is intended to provide a speaker having excellent sound quality. [0010] In order to solve the above-mentioned problems, a speaker according to the present invention comprises a voice coil fitted at least in a magnetic gap of a magnetic circuit, and an outer periphery formed in a frame connected to the magnetic circuit. A diaphragm which is coupled and has an inner periphery coupled to the voice coil, and a damper which is coupled to the voice coil and the frame and supports the voice coil and comprises a plurality of corrugated or S-shaped resin wires. It reduces the difference in displacement due to upward and downward forces acting on the damper, reduces non-linear distortion at large amplitude, improves sound quality, reduces the weight of the damper, increases sound pressure, etc. Various characteristics can be improved as a speaker. The invention according to claim 1 of the present invention is characterized in that at least a voice coil fitted in a magnetic gap of a magnetic circuit and a frame whose outer periphery is connected to a frame connected to the magnetic circuit are provided. A vibration plate having a periphery coupled to the voice coil, and a damper coupled to the voice coil and the frame and supporting the voice coil and formed of a plurality of corrugated or S-shaped resin wires. In addition to reducing the difference in displacement due to upward and downward forces acting on the damper, reducing nonlinear distortion at large amplitudes and improving sound quality, reducing the weight of the damper, increasing sound pressure, adopting resin wire To prevent surface resonance, prevent the peak dip of the frequency in the middle and high frequency range of the speaker, and reduce the stiffness of the vibration system to reduce the resonance frequency of the speaker ( with decreasing is that attained the f0), small
At least the ends of multiple resin wires are
At the joint of the frame or the joint of the frame
It is connected and secures the contact area at the joint
Thus, the adhesive strength is improved. An embodiment of the speaker according to the present invention will be described below with reference to FIGS. 1 to 3. (Embodiment 1) FIG. 1 is a side sectional view of a speaker according to an embodiment of the present invention, and FIG. 2 (a) is a top view of a damper which is a main part of the speaker, and FIG. (B) is a side view of the same half section, and FIG. 3 is a force / displacement characteristic diagram. According to FIG. 1, reference numeral 1 denotes a non-axially symmetric diaphragm having a major axis and a minor axis and an edge 2 on an outer periphery thereof. 1 is held in the frame 9. Reference numeral 10 denotes a magnetic circuit disposed on the bottom surface of the frame 9 including the upper plate 7a, the magnet 8, and the lower plate 7b. Reference numeral 6 denotes a damper made of a corrugated resin wire. It is suspended and fixed by bonding. Reference numeral 3 denotes a voice coil coupled to the diaphragm 1. A voice coil winding 4 is wound around a portion to be inserted into the magnetic gap. Are combined. The damper 6 made of a resin wire will be described in detail. The damper 6 extends radially from the joint 6a to the voice coil 3 to form a joint 6b to the frame 9, and the joint 6b
The resin wire portion 6c is integrated by a and 6b, and the bonding area between the voice coil 3 and the frame 9 is increased by the connecting portions 6a and 6b, thereby improving the bonding strength. In the above embodiment, the damper 6 has a waveform, but may have an S-shape. In any case, the displacement of the damper 6 is different from the vertical movement of the voice coil 3 in the vertical movement. In addition, the weight can be reduced by using a resin wire. It is desirable that the connecting portion 6b has a larger contact area than the connecting portion 6a, and the connecting portion 6a should be kept at a minimum for obtaining the bonding strength with the voice coil 3. Desirable to increase the sound pressure of the speaker,
It is preferable that the coupling portion 6b is large as long as the shape of the damper 6 is not affected in terms of holding and handling. FIG. 3 shows the damper 6 in the above embodiment.
It was confirmed that the linearity was improved as compared with the conventional one shown in FIG. As described above, the speaker of the present invention has a damper composed of a plurality of corrugated or S-shaped resin wires, and the difference between the upward and downward force acting on the damper is reduced. It is possible to provide a loudspeaker which can reduce nonlinear distortion at the time of large amplitude to improve sound quality, reduce the weight of the damper, and increase the sound pressure.

[Brief description of the drawings] FIG. 1 is a side sectional view of an embodiment of a speaker according to the present invention. FIG. 2A is a top view of a damper as a main part of the same. (B) Side view of the same half section FIG. 3 is a force / displacement characteristic diagram of the damper. FIG. 4 is a top view of a conventional speaker. FIG. 5 is a side sectional view in the same major axis direction. FIG. 6 is a side sectional view of the minor axis direction. FIG. 7 is a force / displacement characteristic diagram of a damper, which is a main part of the same. [Explanation of symbols] 1 diaphragm 3 voice coil 6 Damper 9 frames 10 Magnetic circuit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 58-54197 (JP, U) JP-A 6-85598 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04R 9/02 101 H04R 9/02 103

Claims (1)

(57) [Claim 1] At least a voice coil fitted into a magnetic gap of a magnetic circuit, an outer periphery is coupled to a frame coupled to the magnetic circuit, and an inner periphery is coupled to the voice coil. And a ring-shaped connection coupled at least at one end to the voice coil or the frame.
The joints are extended radially, connected and integrated ,
A speaker comprising a damper made of a plurality of resin wires in a waveform or S-shape supporting the voice coil.