JPH0633758Y2 - Wiring structure of dome type speaker - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a speaker wiring structure, and in particular, simplifies a signal input line to a vibration system in a dome-shaped speaker and simplifies an assembly process and improves reliability. The present invention relates to a wiring structure of a speaker that can be improved.

(Prior Art) Generally, as shown in FIG. 5 as a partial cross-sectional view, a dome-shaped speaker has a flange 32 of an edge 31 extending from a dome-shaped diaphragm 30 sandwiched by ring-shaped holding plates 33. Is attached to the top plate 34 to support the vibration system. Coil 36 wound around coil bobbin 35
The starting end and the terminating end thereof are led out to the edge 31 side, and the wire rod 37 pulled out from the coil 36 is led out while being sandwiched between the edge 31 and the top plate 34 by the holding plate 33.

(Problems to be solved by the invention) Generally, in this kind of dome type speaker for mid-high range, the width of the edge portion is narrow, but in the above-mentioned conventional dome type speaker, when the wire rod 37 is drawn,
31 and the top plate 34 must be pinched by the holding plate 33 so that they do not come into contact with the top plate 34 and are not cut or short-circuited. It was extremely troublesome. Therefore, the work of pulling out the wire 37 is complicated, which causes a decrease in productivity, and there is a high risk of cutting during the work, resulting in a poor yield.

We have separately proposed a dome-type speaker as shown in FIG. 4 as a sectional view.

This dome type speaker has a vibration system A in which a dome type diaphragm 21, a coil bobbin portion 22 and an edge portion 23 extending horizontally in a lower end thereof are integrally formed in a magnetic circuit portion B, Inside the lower end of the guide step G, the edge part 23 is sandwiched by edge pressing members 26, 26 made of a flexible member or the like, which are arranged in a guide step G for edge placement formed on the inner peripheral edge of the lower end of the top plate 19. By closely fitting the peripheral edge to the engaging portion 17a provided on the upper outer peripheral edge of the pole portion 17, it is possible to assemble the magnetic circuit portion B including the yoke 16 and arrange the vibration system A at a predetermined position at the same time. It is the one.

As a wiring structure, the coil 24 is wound such that the starting end and the terminating end thereof are located below the moving coil, and the lead wire material 27 of the coil is passed along the edge portion 23 into the wiring groove 19a formed on the lower surface of the top plate. Are led out to the outside of the magnetic circuit unit. In the figure, 18
Is a magnet, 20 is a gap, and 17b is a notch formed in the lower portion of the engaging portion 17a. By making the engaging portion 17a flange-shaped, the magnetic resistance of the engaging portion 17a is increased. ing. 28 is a terminal metal fitting and 29 is an insulating substrate.

The dome type loudspeaker according to the above proposal can be remarkably simplified in its wiring structure as compared with the conventional dome type loudspeaker, but it is necessary to form the guide step portion G and the wiring groove to increase the thickness of the top plate. There are some points that should be improved, such as what must be done.

An object of the present invention is to solve the drawbacks of the conventional dome-type speaker wiring structure and to provide an optimum speaker wiring structure by applying it to the dome-type speaker according to our proposal described above.

(Means for Solving Problems) A wiring structure for a dome-type speaker according to the present invention includes a vibration system including a dome-type diaphragm, a coil bobbin portion, and an edge portion extending horizontally at a lower end thereof. In a dome type speaker incorporated in a magnetic circuit, a support portion bent downward is provided on the outer peripheral edge of an edge portion formed of an insulating material such as synthetic resin, and a fitting portion provided on the outer periphery of the pole portion of the yoke. And a fitting portion provided on the inner peripheral surface of the lower surface of the top plate are fitted in such a manner that the supporting portion is sandwiched, and the lead wire of the voice coil wound around the coil bobbin has its edge portion crawled, and then The lead wire of the above is led downward from the notch formed in the support part and its tip is connected to the yoke side, and the tip of the other lead wire is connected to the top plate side to input a signal to the vibration system. As a line, the yoke side serves as one input line, and the top plate side or a conductive frame coupled to the top plate side serves as the other input line.

(Function) The dome-shaped diaphragm, the coil bobbin portion, and the edge portion extending horizontally in the lower end thereof are integrally molded with an insulating material such as synthetic resin, and the lead wire material of the voice coil wound around the coil bobbin is edged. After crawling the parts, one lead wire is guided downward from the notch formed in the support part to connect the bare part to the pole part, and the other lead wire is connected to the top plate side.

Thus, if terminals are provided on the yoke and a part of the top plate (or frame), the yoke side becomes one input line to the voice coil and the top plate side becomes the other input line, and the wiring structure is extremely simple. Become.

(Embodiment) An embodiment of a speaker wiring structure according to the present invention will be described with reference to FIGS. 1 to 3. FIG.
FIG. 2 is an enlarged cross-sectional view of the main part, and FIG. 3 is a perspective view of the main part showing the processing state of the lead wire.

In the figure, 1 is a yoke, 2 is a pole portion, 3 is a magnet, and 4 is a top plate. In the present invention, a vibration system A having a dome-shaped diaphragm 5, a coil bobbin portion 6 and an edge portion 7 extending from the lower end portion of the coil bobbin portion 6 and a voice coil 15 wound around the coil bobbin portion 6 is provided in the magnetic circuit portion. In the dome type speaker incorporated in B, a supporting portion 8 bent downward is provided on the outer peripheral edge of an edge portion 7 formed of an insulating material such as synthetic resin, and provided on the outer periphery of the pole portion 2 of the yoke 1. Fitting part 9 and top plate 4
The fitting portion 10 provided on the inner peripheral side of the lower surface of the above is fitted in such a manner that the supporting portion 8 is sandwiched, and the yoke 1 side serves as one input line for the signal input line to the vibration system and the top plate 4 The side or the frame F having conductivity which is coupled to the side is connected so as to be the other input line.

The support portion 8 does not necessarily have to be provided on the entire circumference and may be partially provided, but in this case, it should be provided on a divided basis. Incidentally, in the embodiment, a slight flange portion 8b is formed on the lower end edge thereof.
Is provided, and the lower end edge of the fitting portion 10 is engaged with this to be guided. The magnet 3 is non-conductive, and a non-conductive ferrite magnet is used, or if it is conductive, an insulating coating is used.

The voice coil 15 is wound around the coil bobbin portion 6 so that the start end and the end thereof are located at the lower end of the coil. For example, the coil is wound from the lower end, folded back at the upper end of the coil bobbin portion, and overlapped to the lower end. The lead wires 11 and 12 are wound by the process, but after the upper surface of the edge portion 7 is crawled, one lead wire 11 is located below the cutout portion 8a formed in a part of the support portion 8 to the lower side. It is bent so that its bare portion 11a is connected to the fitting member 9a, that is, the yoke 2 side. Also, the other lead wire
12 is bent upward from the outer periphery of the edge portion 7, and its bare portion 12a is connected to the fitting member 10a, that is, the bottom surface side of the top plate 4. In addition, it is possible to improve conductivity by providing a conductive portion having good conductivity such as copper or silver on the entire surface or a part of the yoke and the top plate by plating, coating, vapor deposition or the like. In the figure, 13 and 14 are terminals attached to the yoke 2 side and the top plate 4, respectively, but the frame F may be integrally coupled to the top plate 4 to provide terminals to the frame F.

(Effect of the Invention) According to the speaker wiring structure of the present invention, the coil bobbin portion of the dome-shaped diaphragm and the edge portion extending horizontally in the lower end of the coil bobbin portion are integrally molded with an insulating material such as synthetic resin, After the lead wire material of the voice coil wound around the coil bobbin is crawled along the edge portion, one lead wire material is guided downward from the notch formed in the support part to connect the bare part to the pole part and the other. By connecting the bare part of the lead wire material to the top plate side, the yoke side serves as one input line to the voice coil and the top plate side serves as the other input line. It can be used as an input line to the coil, and the wiring structure of the dome type speaker can be significantly simplified.

In this way, the assembly process can be simplified, the wiring structure can be simplified, the thickness of the top plate does not need to be particularly large, and the cost can be reduced. .

[Brief description of drawings]

1 to 3 show an embodiment of a wiring structure of a speaker according to the present invention. FIG. 1 is a sectional view of a main part, FIG. 2 is an enlarged sectional view of the main part, and FIG. 3 is a lead wire material. It is a perspective view of the principal part showing a processing state. FIG. 4 is a sectional view showing a dome-type speaker that we have separately proposed, and FIG. 5 is a partial sectional view showing a conventional dome-type speaker. A: Vibration system, B: Magnetic circuit part, 1: Yoke, 2: Pole part, 3: Magnet 4: Top plate, F: Frame, 5: Dome type diaphragm, 6:
Coil bobbin part 7: Edge part, 8: Support part, 9: Pole side fitting part, 9a: Fitting member 10: Top plate side fitting part, 10a: Top plate side fitting part 11.12: Lead wire, 13,14: Terminal

Claims (2)

[Scope of utility model registration request] 1. A dome type loudspeaker in which a vibration system having a dome type diaphragm, a coil bobbin section and an edge section extending horizontally in a lower end thereof is incorporated in a magnetic circuit, wherein an insulating material such as synthetic resin is used. A support portion bent downward is provided on the outer peripheral edge of the edge portion formed by, and a fitting portion provided on the outer periphery of the pole portion of the yoke and a fitting portion provided on the inner peripheral side of the lower surface of the top plate. And the lead wire of the voice coil wound around the coil bobbin is fitted to the support part so as to sandwich the support part, and after the edge part is crawled, one of the lead wire parts is moved downward from the notch part formed in the support part. And the tip of the other lead wire to the top plate side, and the signal input line to the above vibration system becomes one input line on the yoke side and the top side. A wiring structure for a dome-shaped speaker, characterized in that a plate side or a frame having conductivity connected thereto is connected so as to be the other input line. 2. A utility model registration claim according to claim 1, wherein a conductive part having good conductivity is provided on the entire surface or a part of the yoke and the top plate, and the lead wire is bonded to the conductive part. Wiring structure of the dome type speaker described.