JPH1094089A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a superior speaker which can reproduce a low frequency and makes an amplitude follow up even a large-input signal as to a speaker which is used for various video and audio equipment. SOLUTION: The inner periphery is coupled with a voice coil 6 below a diaphragm 11 and the outermost periphery is folded down and further folded to the inner periphery across a linear part 8; and the area of the movable part 10 of a damper 7 can be maximized by the damper 7 constituted by coupling the joint part 8 of the part which is folded to the inner periphery with a frame 9 and the flexibility of the damper 7 is increased, thereby providing the speaker which is improved in amplitude limit, and can reproduce low frequencies and makes the amplitude follow up even the large-input signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker used for various video and audio equipment.

[0002]

2. Description of the Related Art A conventional speaker will be described with reference to a sectional view of FIG. In the figure, 53 is an upper plate, 54 is a magnet, and 55 is a lower plate. A magnetic gap 56 is provided between the upper plate 53 and the lower plate 55 to form a magnetic circuit 57 as a whole. Reference numeral 58 denotes a voice coil, which is coupled to an inner periphery of a diaphragm 59 whose outer periphery is coupled to the frame, and supported by a damper 61 so that the coil portion 60 is inserted into an appropriate position of the magnetic gap 56. In addition, the damper 61 has a voice coil 58
A movable portion 62 for damping the vertical vibration of the device and a joint portion 63 formed around the movable portion 62 are fixed to the frame 64 by the joint portion 63. Reference numeral 65 denotes a dustproof cap for preventing foreign matter from entering the magnetic gap 56.

In the loudspeaker constructed as described above, when a voice current flows through the coil section 60 of the voice coil 58, the voice coil 58 vibrates up and down in accordance with the direction of the voice current. Vibrating plate 59
Are similarly vibrated and radiated to the outside as sound waves.

[0004]

However, in the above-mentioned conventional structure, the outer diameter of the joint 63 for joining the damper 61 to the frame 64 is determined by the size of the frame 64. Damper 61
The area of the movable part 62 having the braking function as the actual damper 61 is smaller than the outer peripheral area.

The damper 61 has a great influence on the performance of the speaker due to its flexibility and maximum amplitude. The greater the flexibility, the lower the minimum resonance frequency of the speaker becomes. Since the larger the amount, the larger the input can be reproduced, the area of the movable portion 62 cannot be maximized to the outer diameter of the frame 64 in the conventional configuration,
Since it becomes difficult to further increase the flexibility and the maximum amplitude of the damper 61, further improvement in speaker performance cannot be expected.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a loudspeaker of the same shape having the highest performance.

[0007]

The present invention comprises a magnetic circuit,
A frame coupled to the magnetic circuit, a voice coil having a coil portion inserted into a magnetic gap of the magnetic circuit,
A diaphragm having an inner periphery coupled to the voice coil and an outer periphery coupled to the frame; and an inner periphery coupled to the voice coil below the diaphragm and an outermost periphery folded down to form an outer periphery through a linear portion. Since the speaker is composed of the part folded back to the inner peripheral side and the part folded back to the inner peripheral side and the damper combined with the above-mentioned frame, the area of the movable part of the damper can be maximized, and the flexibility as the damper can be achieved. Therefore, it is possible to provide an excellent loudspeaker having an improved amplitude limit, enabling reproduction of a lower frequency band, and having an amplitude that follows a large input signal.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a magnetic circuit, a frame coupled to the magnetic circuit, a voice coil having a coil portion inserted into a magnetic gap of the magnetic circuit, A diaphragm having an inner periphery coupled to the voice coil and an outer periphery coupled to the frame; and an inner periphery coupled to the voice coil below the diaphragm and an outermost periphery folded down to form an outer periphery through a linear portion. Since it is composed of a damper that is folded back to the inner periphery and is folded back to the inner periphery and the damper that combines the frame, the area of the movable part of the damper can be maximized and the flexibility as the damper is increased. It is possible to provide an excellent loudspeaker whose amplitude limit is improved, which enables reproduction of lower frequency band, and whose amplitude follows even a large input signal.

According to a second aspect of the present invention, there is provided a magnetic circuit, a frame coupled to the magnetic circuit, a voice coil having a coil portion inserted into a magnetic gap of the magnetic circuit, A diaphragm coupled to the voice coil and having an outer periphery coupled to the frame; and a damper coupled to the frame at a linear portion formed by bending the outermost portion of the diaphragm below the diaphragm and having an inner periphery coupled to the voice coil below the diaphragm. Therefore, the same effect as that of the loudspeaker according to the first aspect can be realized with a small size by the damper according to the first aspect.

In the invention according to claim 3 of the present invention, since the joining table is connected to the outermost peripheral portion of the damper according to claim 2, and the bottom of the joining table is connected to the frame, the damper is slightly eccentric. Even if you do, the shape can be joined to the frame without distortion,
The voice coil can be normally supported.

According to a fourth aspect of the present invention, there is provided a magnetic circuit, a frame coupled to the magnetic circuit, a voice coil having a coil portion inserted into a magnetic gap of the magnetic circuit, A diaphragm having an inner periphery coupled to the voice coil and an outer periphery coupled to the frame, a first damper having an inner periphery coupled to the voice coil below the diaphragm and having an outermost periphery folded downward to form a linear portion; The outer circumference is the first
And a second damper having an inner periphery coupled to the frame, the first damper having higher flexibility by using the second damper. This makes it possible to realize a speaker that can extend the reproduction band to a low frequency and withstand a larger input.

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 is a sectional view of an embodiment of a speaker according to the present invention. In FIG.
Reference numeral 2 denotes a magnet, and reference numeral 3 denotes a lower plate. A magnetic gap 4 is provided between the upper plate 1 and the lower plate 3 to constitute a magnetic circuit 5 as a whole. Reference numeral 6 denotes a voice coil, which is supported by a damper 7. The voice coil 6 is fixed to a frame 9 by a joint 8 of the damper 7, and the movement of the voice coil 6 is controlled by a movable portion 10 of the damper 7. Reference numeral 11 denotes a diaphragm for radiating sound waves to the outside, and reference numeral 12 denotes a dustproof cap for preventing foreign matter from being inserted into the magnetic gap 4.

The operation of the loudspeaker configured as described above will be described with reference to FIG. First, magnetic gap 4
When a voice current flows through the voice coil 6 disposed in the voice coil 6, the voice coil 6 vibrates according to the direction of the voice current, so that the diaphragm 11 also vibrates and emits sound waves to the outside. At this time, the vertical vibration of the voice coil 6 is controlled by the movable portion 10 of the damper 7, but the outermost periphery of the damper 7 is folded back to provide a straight portion 8a, and furthermore, the joining portion provided at the portion folded back to the inner periphery side Since the frame 8 and the frame 9 are combined, the joint 8 of the damper 7 is formed inside the outer periphery, so that the area of the movable portion 10 can be maximized, and the flexibility of the damper 7 is increased. The upper and lower amplitude limits can be made larger.

As described above, according to the present embodiment, the area of the movable portion 10 of the damper 7 can be maximized, the sound wave can be reproduced from a lower frequency, and the amplitude can be increased even for a larger input signal. It is possible to realize a supply of a speaker excellent in performance that can be followed.

(Embodiment 2) FIG. 2 is a sectional view of a loudspeaker according to another embodiment of the present invention.
Is an upper plate, 14 is a magnet, 15 is a lower plate, 1
6 is a magnetic gap, 17 is a magnetic circuit formed by these, 18 is a voice coil, 19 is a frame, 20 is a diaphragm, 21 is a dustproof cap, and the above is the same as the configuration of FIG. The difference from the configuration of FIG.
The movable portion 24 of the damper 22 is maximized in that the joint portion 23 is formed as a straight portion that stands upright on the maximum outer periphery of the damper 22.

The speaker configured as described above also has
An operation similar to that of the first embodiment is performed. That is, the voice coil 18 vibrates up and down due to the input audio current, so that the diaphragm 20 also vibrates and emits sound waves to the outside. However, since the area of the movable portion 24 of the damper 22 is increased, the damper 22 Vibration can be started from a lower frequency and the amplitude can be increased.

As described above, according to the second embodiment of the present invention, the area of the movable portion 24 can be increased by providing the joint 23 of the damper 22 on the straight portion that stands upright on the outer periphery, and the lower frequency can be obtained. In addition to extending the reproduction band, it is possible to provide a speaker with excellent performance that can withstand higher input.

(Embodiment 3) FIG. 3 is a sectional view of a loudspeaker according to still another embodiment 3 of the present invention, in which 25 is an upper plate, 26 is a magnet, 27 is a lower plate, and 28 is A magnetic gap, 29 is a magnetic circuit composed of these components, 30 is a voice coil, 31 is a frame, 32 is a diaphragm, and 33 is a dust-proof cap. The difference from the configuration of FIG.
The joint base 35 is joined to the linear portion 34a of the damper 34 in advance, and then joined to the voice coil 30 and then joined to the frame 31 at the joint 36. Thereby, the damper 3
Even if 4 is slightly eccentric, the size of the coupling surface 37 of the frame 31 is slightly increased so that the shape of the damper 34 can be joined without being distorted. The movable section 38 can be made as large as possible.

As described above, also in the embodiment, the area of the movable portion 38 can be made larger by providing the joining table 35 inside the damper 34, and the reproduction band can be expanded to a lower frequency and higher. This makes it possible to provide a speaker with excellent performance that can withstand input.

(Embodiment 4) FIG. 4 shows another embodiment of the present invention. Referring to FIG.
0 is a magnet, 41 is a lower plate, 42 is a magnetic gap,
Reference numeral 43 denotes a magnetic circuit, 44 denotes a voice coil, 45 denotes a frame, 46 denotes a diaphragm, and 47 denotes a dustproof cap, which are the same as those shown in FIG. 1 in that a second damper 49 is provided in addition to the first damper 48, and the second damper 49 is previously joined to the linear portion 48a of the first damper 48. After being joined to the voice coil 44, the second damper 49 is joined to the frame 45 at the joint 50. This allows
Even if the damper 48 is slightly eccentric, the shape of the damper 48 can be joined to the frame 45 without distortion, and the area of the movable portion 51 of the first damper 48 can be maximized. Since the second movable portion 52 is provided on the second damper 49, the voice coil 44 can be braked more flexibly, and the amplitude length can be increased.

The speaker configured as described above also has
Since the voice coil 44 vibrates up and down due to the input audio current, the diaphragm 46 also vibrates, and emits sound waves to the outside. Also in this case, by providing the second damper 49 on the first damper 48, not only the area of the movable portion 51 of the first damper 48 can be maximized but also the second damper 49 can be increased.
Since the second movable portion 52 of the damper 49 is added, the flexibility of the first damper 48 is increased and the amplitude can be increased.

As described above, according to the embodiment, the first
By providing the second damper 49 inside the damper 48, it is possible to extend the reproduction band to a lower frequency and to provide a speaker with excellent performance that can withstand higher input.

[0023]

As described above, the present invention can be used to the maximum extent as the movable portion of the damper, so that the flexibility of the damper can be increased, the amplitude limit can be improved, lower frequency reproduction can be achieved, and a large input can be achieved. It is possible to provide an excellent speaker whose amplitude follows a signal.

[Brief description of the drawings]

FIG. 1 is a sectional view of a speaker according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a speaker according to another embodiment.

FIG. 3 is a sectional view of a speaker according to another embodiment.

FIG. 4 is a cross-sectional view of a speaker according to another embodiment.

FIG. 5 is a sectional view of a conventional speaker.

[Explanation of symbols]

 4, 16, 28, 42 Magnetic gap 5, 17, 29, 43 Magnetic circuit 6, 18, 30, 44 Voice coil 7, 22, 34 Damper 8, 23, 36, 50 Joint 9, 19, 31, 45 Frame 10, 24, 38, 51 Movable part 35 Joining table 48 First damper 49 Second damper 52 Second movable part

Claims (4)

[Claims] At least a magnetic circuit, a frame coupled to the magnetic circuit, a voice coil having a coil portion inserted in a magnetic gap of the magnetic circuit, and an inner periphery coupled to the voice coil and an outer periphery coupled to the frame The inner periphery is coupled to the voice coil below the diaphragm, the outermost periphery is folded downward, and the outer periphery is further folded back to the inner periphery through the linear portion, and is folded back to the inner periphery. A speaker comprising a portion and a damper obtained by combining the frame. 2. A magnetic circuit, a frame coupled to the magnetic circuit, a voice coil having a coil portion inserted into a magnetic gap of the magnetic circuit, and an inner periphery coupled to the voice coil and an outer periphery coupled to the frame. And a damper coupled to the frame by a linear portion formed by bending the outer periphery of the diaphragm below the inner periphery of the diaphragm and connecting the inner periphery to the voice coil below the diaphragm. 3. A joining table is connected to the outermost peripheral portion of the damper,
3. The loudspeaker according to claim 2, wherein the bottom of the joining table is connected to the frame. 4. At least a magnetic circuit, a frame coupled to the magnetic circuit, a voice coil having a coil portion inserted into a magnetic gap of the magnetic circuit, and an inner periphery coupled to the voice coil and an outer periphery coupled to the frame. A first damper whose inner periphery is coupled to the voice coil below the diaphragm and whose outermost periphery is folded downward to form a linear portion; and an outer periphery of which is the first damper. A speaker comprising a second damper coupled to the linear portion and having an inner periphery coupled to the frame.