JPH0617438Y2 - Wiring structure of dome type speaker - Google Patents

Description

[Detailed Description of the Invention] [Purpose of Invention] (Industrial field of application) The present invention relates to a wiring structure for a dome-shaped speaker, and in particular, it is possible to accurately wire the lead wire material of a coil in the dome-shaped speaker. The present invention relates to a wiring structure for a dome-shaped speaker, which is capable of simplifying an assembly process and improving reliability.

(Prior Art) As shown in FIG. 3 as a partial sectional view of a conventional dome type speaker, a flange 32 of an edge 31 extending from a dome type diaphragm 30 is clamped by a ring-shaped holding plate 33, The vibration system is supported by adhering this to the top plate 34. Coil 36 formed on 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. 38 is a frame.

(Problems to be solved by the invention) Generally, in this kind of dome type speaker for the middle and high frequencies, the width of the edge portion is narrow, but in the above-mentioned conventional dome type speaker, when deriving the wire rod 37,
31 and the top plate 34 must be held between the holding plate 33 and 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. For this reason, 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.

The object of the present invention is to eliminate the above-mentioned drawbacks of the conventional wiring structure, to accurately wire the lead wire material of the voice coil, simplify the assembly process and improve reliability, and cut the lead wire material. An object of the present invention is to provide a wiring structure for a dome-type speaker that does not have the risk of being damaged.

[Configuration of Device] (Means for Solving Problems) In the wiring structure of the dome-type speaker according to the present invention, one end of the magnetic circuit of the dome-type speaker is fitted to the outer circumference of the pole part and the other end is Arrange a guide ring member made of an insulator that is engaged and fixed to the top plate,
The guide ring member has a terminal holding portion projecting from the insertion hole formed in the yoke to the bottom surface side of the yoke and having a terminal metal fitting inserted therein. The voice coil to be wound around the coil bobbin of the system is formed such that the start end and the end thereof are located under the coil, and the lead wire material and the wiring wire material such as the tinsel wire are connected at the lower vertical portion of the coil bobbin. Is connected to the terminal fitting in the guide ring member.

(Operation) Contrary to the conventional voice coil, the winding start of the voice coil is started from the lower side of the bobbin, and the winding end is finished at the lower end side. Wiring wire material such as tinsel wire is connected and fixed to the end of the coil at the lower portion of the vertical portion of the coil bobbin. Next, the edge portion of the vibration system is supported by the top plate, and the other end of the guide ring member is engaged and fixed to the top plate, and the wiring wire is connected to the terminal fitting of the guide ring member. In this state, when the yoke and the magnet are assembled by fitting one end of the guide ring member to the yoke pole portion in the reverse order of the conventional assembly, the terminal holding portion of the guide ring member is inserted from the insertion hole formed in the yoke. The input line of the voice coil can be led out to the outside of the magnetic circuit by protruding to the bottom side of the yoke.

(Embodiment) An embodiment of the wiring structure of a dome-type speaker according to the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a sectional view of the dome-type speaker with a part thereof removed, FIG. FIG. 4 is an enlarged cross-sectional view showing a connection state between a voice coil and a wiring wire material.

In the figure, 1 is a magnetic circuit part, 2 is a yoke, 3 is a pole part, 4 is a magnet, and 5 is a top plate. An insertion hole 2a reaching the bottom surface side is formed in the yoke 2 near the base end of the pole portion 3, and the insertion hole 2a is symmetrically provided at a position shifted by 180 °. Further, a plurality of engaging projections 5a are formed in a frequency-divided manner near the inner peripheral edge of the lower surface of the top plate 5.

Reference numeral 6 denotes a guide ring member formed of an insulating material such as synthetic resin. The guide ring member 6 is formed by the vertical portion 6a and the bottom portion 6b in an inverted "L" shape in cross section, and one end (the inner peripheral edge of the bottom portion) is on the outer circumference of the pole portion 3. The other end (upper end of the vertical portion) is engaged with and fixed to the engagement protrusion 5a of the top plate 5, and the bottom portion 6b is inserted into the insertion hole 2a. The terminal holding part 7 is symmetrically projected, and the terminal fitting 8 is insert-molded on the terminal holding part 7.

The oscillating system 10 has a dome-shaped diaphragm 11 and a coil bobbin 12 which are integrally formed. A voice coil to be wound around this.
Contrary to the conventional voice coil, 14 starts winding the coil from the lower side of the coil bobbin portion 12 after winding a predetermined width and then folds it back to end the winding at the lower end side. In this case, the coil ends are located at positions shifted by 180 °, and a wiring wire material 9 such as a tinsel wire having excellent amplitude resistance is connected and fixed to the coil ends at the position of the lower portion 12a of the vertical portion of the coil bobbin portion 12. .

Next, the edge portion 13 of the vibration system 10 is supported by the edge pressing member 22 between the edge arrangement step portion 21 formed on the inner peripheral lower surface of the frame 20 and the upper surface of the top plate 5. The upper end of the vertical portion of the guide ring member 6 is engaged with and fixed to the engaging projection 5a of the top plate 5 in which the vibration system 10 is assembled in this manner, and the terminal wire 8 of the guide ring member 6 is connected to the wiring wire 9 To 9a. In this state, the yoke 2 and the magnet 4 are assembled by fitting the inner peripheral edge of the bottom portion of the guide ring member 6 to the yoke pole portion 3 in the reverse order of the conventional assembly. As a result, the terminal holding portion 7 of the guide ring member 6 protrudes from the insertion hole 2a formed in the yoke to the bottom surface side of the yoke, and each input line of the voice coil 14 can be led out of the magnetic circuit at a position shifted by 180 °. it can.

[Advantages of the Invention] According to the wiring structure of the dome type speaker according to the present invention, the beginning and the end of the voice coil to be formed on the coil bobbin are located under the coil, and the coil end and the tinsel wire are wired. The wire is connected at the lower part of the vertical portion of the coil bobbin, and the wire is connected to the terminal fitting in the terminal holding part of the guide ring member arranged in the magnetic circuit and led out to the bottom side of the yoke. In addition to being extremely good, wiring work is facilitated because the lead wire material, which is a thin wire, is not drawn around, and there is no risk of disconnection during assembly work or movement. Further, there is an effect that the forming of the lead wire material is easy and the connecting work to the terminal fitting can be easily performed.

[Brief description of drawings]

1 and 2 show an embodiment of a wiring structure of a dome-type speaker according to the present invention. FIG. 1 is a sectional view of the dome-type speaker with a part thereof removed, and FIG. 2 shows a voice coil and a wiring wire. It is an expanded sectional view showing a connected state. FIG. 3 is a partial sectional view showing a wiring structure of a conventional dome type speaker. 1: magnetic circuit part, 2: yoke, 2a: insertion hole 3: pole part, 4: magnet, 5: top plate 5a: engaging protrusion, 6: guide ring member, 6a: vertical part 6b: bottom part, 7: terminal Holding part, 8: Terminal fitting, 9: Wiring wire material, 10: Vibration system, 11: Dome type diaphragm 12: Coil bobbin part, 13: Edge part 14: Voice coil

Claims (1)

[Scope of utility model registration request] 1. A magnetic ring of a dome type speaker is provided with a guide ring member made of an insulating material, one end of which is fitted to an outer circumference of a pole portion and the other end of which is fixed by being engaged with a top plate. The guide ring member is provided with a terminal holding portion projecting from the insertion hole formed in the yoke to the bottom surface side of the yoke and having the terminal metal fitting inserted therein, and is wound around the coil bobbin of the vibration system. The voice coil to be used is formed such that its starting end and terminal end are located under the coil, and its lead wire material and wiring wire material such as tinsel wire are connected at the lower vertical portion of the coil bobbin, and this wiring wire material is the terminal in the guide ring member. Wiring structure for a dome-shaped speaker characterized by being connected to metal fittings.