JPH0588092U - Speaker - Google Patents

Abstract

(57) [Summary] [Object] To provide a speaker in which a voice coil bobbin having a voice coil is prevented from tilting or rolling when a piston moves. In a speaker including a voice coil bobbin having a voice coil arranged in a magnetic gap, the voice coil bobbin is oscillatably supported at two points, a substantially central portion and an upper portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a speaker which is a kind of audio equipment.

[0002]

[Prior Art]

 This type of speaker is generally configured as shown in FIG. That is, in the figure, 1 is an inverted T-shaped yoke, 2 is a ring-shaped magnet, 3 is a plate provided thereon, and these constitute a magnetic circuit having a magnetic gap. Further, 4 is a frame whose bottom is fixed to the upper part of the plate 2, 5 is a vibrating plate, the outer periphery is connected to the outer periphery of the frame 4 via the edge 5a, and the inner periphery is arranged in the magnetic gap. The inner peripheral portion of the damper portion 5b is connected to the voice coil bobbin 7 having the voice coil 6 formed therein. Further, a substantially central portion of the voice coil bobbin 7 is oscillatably supported by a damper 8.

[0003]

[Problems to be solved by the device]

 However, in such a speaker, since there is only one damper 8 supporting the voice coil bobbin 7 and so-called single-point support, a voice signal is applied to the voice coil 6, and the voice coil 6 and eventually the voice coil bobbin 7 move in a piston motion. When doing, it is easy to become unstable. Further, since there is a slight distance from the fulcrum of the damper 8 to the position of a certain force point of the voice coil 6 which is the drive source of the vibration system, as shown in FIG. Since the weight distribution above and below 7 is also unbalanced, the operation of the voice coil bobbin makes it easy to roll, and in some cases, the movement of the voice coil bobbin 7 is hindered or the inner peripheral surface of the plate 3 is disturbed. However, there was a problem that it might come into contact with the product and make an abnormal sound.

The present invention has been proposed in view of the above, and an object thereof is to provide a speaker in which the movement of the voice coil bobbin is stabilized.

[0005]

[Means for Solving the Problems]

 According to the present invention, in a speaker including a voice coil bobbin having a voice coil arranged in a magnetic gap, the voice coil bobbin is oscillatably supported at two points, that is, a central portion and an upper portion thereof. Has achieved.

[0006]

[Action]

 In the present invention, since the upper portion of the voice coil bobbin 7 is also supported as described above and the two-point support is provided, the inclination and rolling can be prevented.

[0007]

【Example】

 FIG. 1 shows a first embodiment of the present invention. In this example, the force from the rolling of the diaphragm 5 is suppressed and the rolling of the voice coil bobbin 7 is also suppressed. For example, a cylindrical fixed rod having a bottom is provided in the axial direction of the central portion of the cylindrical voice coil bobbin 7. 9 are erected. That is, a mounting hole is formed at the bottom of the fixing rod 9, and is fixed on the center axis of the center pole 1a of the yoke 1 by fixing means such as screwing using a screw 10. The upper portion of the fixed rod 7 projects upward from the upper portion of the voice coil bobbin 7.

Then, one end of the damper 11 is connected to this upper part, and the other end of the falling portion of the damper 11 is connected to a damper part 5b formed inside the diaphragm 5, and the damper part 5b of this damper part 5b is connected. The inner peripheral portion is connected to the upper portion of the voice coil bobbin 7.

That is, it can be seen that the upper portion of the voice coil bobbin 7 is supported by the damper 11. The rest of the configuration is basically the same as that of the speaker shown in FIG. According to this speaker, since the falling portion of the damper 11 is connected to the diaphragm 5, the rolling of the diaphragm 5 is suppressed, and the voice coil bobbin 7 has a damper 8 at the substantially central portion and an upper portion thereof. Further, since it is supported at two points, that is, the damper 11 and the damper portion 5b, when driven, the inclination of the voice coil bobbin 7 and the rolling of the voice coil bobbin 7 and the diaphragm 5 can be suppressed.

FIG. 2 shows a second embodiment of the present invention. In this embodiment as well as in the first embodiment described above, the force from the rolling of the diaphragm 5 is suppressed and the rolling of the voice coil bobbin 7 is suppressed, and the upper portion of the fixed rod 9 and the diaphragm 5 are almost the same. The central portion is connected by an elastic body 21 having a substantially flat plate shape, and the elastic body 21 suppresses the rolling of the diaphragm 5, and the upper portion of the voice coil bobbin 7 is formed by the elastic body 21 and the damper portion 5b of the diaphragm 5. Is to support. The elastic body 21 is formed with an arcuate slit and has a support annular portion.

FIG. 3 shows a third embodiment of the present invention. From this embodiment onward, unlike the structures of the first and second embodiments described above, emphasis is placed on suppressing rolling of the voice coil bobbin 7. That is, the feature is that the upper outer circumference of the fixed rod 9 and the upper inner circumference of the voice coil bobbin 7 are connected by the direct damper 31, and the force applied to the voice coil bobbin 7 with respect to the rolling of the diaphragm 5 is reduced. There is little influence, and the inclination and rolling of the voice coil bobbin 7 are suppressed. Other configurations are similar to those described above.

FIG. 4 shows a fourth embodiment of the present invention. In this example, a substantially flat plate-shaped elastic body 41 is provided between the fixed rod 9 and the voice coil bobbin 7.

FIG. 5 shows a fifth embodiment which is still another modification. In this embodiment, the dimension of the voice coil bobbin 7 is made long, the upper part of the fixing rod 9A is extended in a fountain-like shape, and the lowered tip end and the outer periphery of the voice coil bobbin 7 are connected by a damper 51. Is.

[Effect of the device]

 As described above, according to the present invention, not only the substantially central portion of the voice coil bobbin but also the upper portion is supported so that the voice coil bobbin 7 is supported at two points, so that the inclination and rolling of the voice coil bobbin 7 can be suppressed.

[Brief description of drawings]

FIG. 1 is a side sectional view of a first embodiment of the present invention.

FIG. 2 is a second embodiment of the present invention, in which the upper one is a half plan view and the lower one is a side sectional view.

FIG. 3 is a side sectional view of a third embodiment of the present invention.

FIG. 4 is a fourth embodiment of the present invention, in which the upper one is a half plan view and the lower one is a side sectional view.

FIG. 5 is a side sectional view of a fifth embodiment of the present invention.

FIG. 6 shows a conventional example.

FIG. 7 is an operation explanatory diagram of a conventional example.

[Explanation of reference signs] 1 yoke 1a center pole 2 magnet 3 plate 4 frame 5 diaphragm 5a edge 5b damper part 6 voice coil 7 voice coil bobbin 8 damper 9,9A fixing rod 10 screw 11 damper 21,41 elastic body 31,51 damper

Claims (1)

[Scope of utility model registration request] 1. A speaker provided with a voice coil bobbin having a voice coil arranged in a magnetic gap, wherein the voice coil bobbin is oscillatably supported at two points, a substantially central portion and an upper portion thereof. .