JPH0513117Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention" (Field of industrial application) This invention relates to the wiring structure of a speaker, and in particular, aims to simplify the signal input line to the vibration system of a dome-shaped speaker, and to simplify the assembly process. The present invention relates to a speaker wiring structure that can be simplified and improved in reliability.

(Prior Art) Generally, in a dome-shaped speaker, as shown in a partial cross-sectional view in FIG. The vibration system is supported by bonding the top plate 34 to the top plate 34. Coil 3 wound around coil bobbin 35
6 has its starting end and terminal end led out to the edge 31 side, and the wire 37 drawn out from the coil 36 is led out while being held between the edge 31 and the top plate 34 by the holding plate 33.

(Problem to be solved by the invention) In general, in this kind of dome-shaped speaker for mid-high range, the width of the edge part is narrow, but in the above-mentioned conventional dome-shaped speaker, when leading out the wire 37, the width of the edge part is narrow. 31 and top plate 3
4, and be careful not to cut or short-circuit the holding plate 3.
3, and it was extremely troublesome to handle these wirings in a narrow work space. For this reason, the work of drawing out the wire rod 37 becomes complicated, causing a decrease in productivity, and the risk of cutting during the work is high, resulting in a decrease in yield.

We separately proposed a dome-shaped speaker as shown in the cross-sectional view in FIG.

This dome-shaped speaker has a dome-shaped diaphragm 21
A vibration system 20 in which a coil bobbin part 22 and an edge part 23 extending horizontally from the lower end thereof are integrally molded is incorporated into the magnetic circuit part 11. The edge portion 23 is held between edge pressing members 26, 26 made of flexible members etc. arranged on the guide step portion 16 for edge arrangement, and the lower inner peripheral edge of the guide step portion 16 is provided on the upper outer peripheral edge of the pole portion 13. By tightly fitting the yoke 12 into the engaging portion 17
The assembly of the magnetic circuit section 11 including the magnetic circuit section 11 and the arrangement of the vibration system 20 at a predetermined position can be performed simultaneously.

As for the wiring structure, the coil 24 is wound so that its starting and ending ends are located under the moving coil, and the lead wire 27 of the coil is led out to the outside of the magnetic circuit unit through the wiring groove 15a formed on the bottom surface of the top plate along the edge portion 23.
The engagement portion 17 is a notch formed in the lower portion of the
By making it flange-shaped, the magnetic resistance of the engaging portion 17 is increased. Reference numeral 28 denotes a terminal fitting, and 29 denotes an insulating substrate.

Although the dome-shaped speaker according to the above proposal has a significantly simpler wiring structure than the conventional dome-shaped speaker, the thickness of the top plate is increased due to the necessity of forming the guide step 16 and the wiring groove. Since the pole part 13 and the top plate 15 are directly fitted, there is a magnetic shot, which causes a slight decrease in magnetic flux density in the magnetic gap 18. In wiring work, the lead wire must be inserted into the wiring groove. There are some points that need to be improved, such as the fact that it takes a long time to do the work because it has to be made to crawl for a long time.

The purpose of the present invention is to eliminate the drawbacks of the conventional dome-shaped speaker wiring structure and to provide an optimal speaker wiring structure that can be applied to the dome-shaped speaker proposed by us above.

"Structure of the invention" (Means for solving the problems) The wiring structure of the dome-shaped speaker according to the invention is as follows:
In a dome-shaped speaker in which a magnetic circuit incorporates a vibration system including a dome-shaped diaphragm, a coil bobbin part, and an edge part extending horizontally from the lower end thereof, the outer peripheral side of the pole part of the yoke and the lower surface of the top plate The inner circumferential side is fitted via a fitting guide member made of a non-magnetic and conductive material such as aluminum and a spacer made of an insulating material, and the lead wire of the voice coil is guided along the edge part. One of them is connected to the yoke side and the other to the top plate side, so that the yoke side is used as one input line, and the top plate side is used as the other input line.

(Function) By incorporating into the magnetic circuit a vibration system that includes a dome-shaped diaphragm, a coil bobbin portion, and an edge portion extending horizontally from the lower end of the coil bobbin portion, the edge portion is held by an edge holding member made of a flexible material. However, the lead wire of the voice coil is guided along the edge part, and one of the lead wires is bent downward and led out to the pole part side, and the other to the top plate side, and its bare wire is The parts are press-connected to each other by the elasticity of the edge holding member.

The outer circumferential side of the pole part of the yoke and the inner circumferential side of the lower surface of the top plate are fitted together via a fitting guide member made of a non-magnetic and conductive material such as aluminum and a spacer made of an insulating material. , the yoke and the top plate are magnetically and electrically non-contact, and the yoke side can be used as one signal input line, while the top plate side can be used as the other signal input line, making the wiring structure extremely simple. It becomes easy.

(Example) An example of the wiring structure of a speaker according to the present invention will be explained based on FIGS. 1 to 4. FIG. 1 is a sectional view of the main part, and FIG. 2 is an enlarged sectional view of the main part. , 3rd
The figure is a perspective view of the main parts showing the processing state of the lead wire,
FIGS. 4A and 4B are cross-sectional views of essential parts showing another form of fitting between the pole part and the top plate. Furthermore, the fifth
Components that are the same as those in the figures are given the same reference numerals and detailed explanations thereof will be omitted.

In the present invention, a vibration system 20 including a dome-shaped diaphragm 21, a coil bobbin part 22, and an edge part 23 extending horizontally from the lower end of the vibration system 20 is attached to a magnetic circuit part.
In this dome-shaped speaker, the outer circumferential side of the pole part 3 of the yoke 2 and the inner circumferential side of the lower surface of the top plate 5 are made of a non-magnetic and conductive material such as aluminum, and are fitted with a guide member 6. and a spacer 7 made of an insulating material, and guide the lead wires 8 and 9 of the voice coil 24 along the edge portion 23, with one lead wire 8 facing the yoke 2 and the other lead wire 9. are connected to the top plate 5 side, with the yoke 2 side serving as one input line and the top plate 5 side serving as the other input line.

To explain the above-mentioned configuration in detail, the pole part 3 is
In the example shown in the figure and FIG. 2, it consists of a large diameter portion 3a and a small diameter portion 3b, and an edge placement step portion 17 is formed. Reference numeral 4 denotes a non-conductive magnet, and if a non-conductive ferrite magnet is used, or if it is conductive, it is coated with an insulating coating.

In a configuration in which the pole portion 3 and the top plate 5 are fitted together via a guide member 6 and a spacer 7, in FIG. A projection 6F shaped like a divided ring is formed on the lower end surface of the inner periphery in a circumferential manner, and is inserted through the insertion hole 5a formed in the top plate 5 to form the guide member 6. And this guide member 6
It is configured to fit into the large diameter portion 3a of the pole portion 3 via a spacer 7 made of a synthetic resin film, a molded product, or the like.

In FIG. 4A, a boss-shaped engaging portion 5b is provided on the lower surface of the top plate 5 closer to the inner periphery in a circumferential manner, and the pole portion 3 is made into a normal cylindrical shape, and the outer periphery of the upper portion is made of aluminum. Cross-sectional collapse “L” due to etc.
A letter-shaped guide member 6 is fitted, and its tip and the engaging portion 5b are fitted with the spacer 7 interposed therebetween. In addition, in FIG. 4B, the guide member 6 in FIG. 4A is formed into a ring shape, and this is fitted into a slight engagement step 3c between the large diameter portion 3a and the small diameter portion 3b of the pole portion 3. , a notched stepped portion 5c formed at the tip thereof and the inner periphery of the lower surface of the top plate 5.
and are fitted together with a spacer 7 interposed therebetween.

The edge part 23 is supported between the edge arrangement step part 17 and the lower surface of the inner circumference of the top plate 5 by being sandwiched between edge suppressing members 26, 26, but the voice coil 24 has its starting and ending ends. The coil is wound around the coil bobbin part 22 so as to be located at the lower end of the coil.For example, the coil 24 is wound by a process such as starting from the lower end, folding back at the upper end of the coil bobbin part 22, and repeatedly winding it to the lower end. There is. After the lead wires 8 and 9 are stretched over the upper surface of the edge portion 23, one of the lead wires 8 and 9 is
is a notch 23a formed in a part of the edge portion 23.
The outer periphery of the lower edge presser member 26 is bent downward from the lower edge presser member 26, and the other side The lead wire 9 is bent upward from the outer periphery of the upper edge holding member 26, and its bare portion 9a is pressure-connected to the top plate 5 by the elasticity of the upper edge holding member. In FIGS. 1 and 2, the lead wire 8 is connected to the edge placement step 17 side, but the lead wire 9 is connected to the guide member 6 to connect the frame F to the other input. It can also be a line. Also, Figure 4 A, B
In this case, one lead wire 8 is connected to a guide member 6 and connected to the yoke 2 via the guide member 6. In the figure, 10a and 10b are terminals attached to the yoke 2 side and the top plate 5, respectively.

Note that if a conductive part with good conductivity such as copper or silver is provided on the entire surface or a part of the yoke and the top plate by plating, coating, vapor deposition, etc., the conductivity will be improved and the magnetostriction will be reduced.

Next, an example of assembling a speaker for carrying out the wiring structure of the present invention will be described based on FIGS. 1 to 3. and turn the bare portion 9a of the other lead wire 9 to the upper surface side of the upper edge holding member. In this state, when the large diameter portion 3a of the pole portion is tightly fitted into the guide member 6 on the top plate 5 side via the spacer 7, the upper and lower edge pressing members 26, 26
The edge portion 23 is held between the two. The depth at which the yoke side fits into the guide member 6 is constant because the magnet 4 acts as a stopper, and the compressive force of the edge pressing members 26, 26 is also constant, so that the lead wire is fitted to the yoke side and the guide member 6 with a constant pressure. It will come into contact with the top plate side. Therefore, by connecting the input cord to the terminals provided on the yoke side and the top plate side, these can be used as input lines as they are, and the terminal structure becomes extremely simple.

"Effects of the Invention" According to the wiring structure of the speaker according to the present invention, the speaker wiring structure includes a dome-shaped diaphragm, a coil bobbin part, and an edge part extending horizontally at the lower end thereof, and the voice to be wound around the coil bobbin. The coil has the bare part of one lead wire in contact with the yoke, and the bare part of the other lead wire in contact with the top plate. The yoke and top plate are not in contact magnetically or electrically because they are fitted via a fitting guide member made of a non-magnetic and conductive material such as aluminum and a spacer made of an insulating material. The yoke side can be used as one signal input line, and the top plate side can be used as the other signal input line, making the wiring structure extremely simple.

In this way, the assembly process can be simplified, the wiring structure can be configured easily, there is no need to increase the thickness of the top plate, and costs can be reduced, making it ideal as the wiring structure for this type of dome-shaped speaker. It is.

[Brief explanation of the drawing]

1 to 4 show examples of the wiring structure of a speaker according to the present invention, and FIG. 1 is a cross-sectional view of the main parts;
Fig. 2 is an enlarged sectional view of the main part, Fig. 3 is a perspective view of the main part showing the processing state of the lead wire, and Fig. 4 A and B are the main parts showing other fitting forms of the pole part and the top plate. FIG. FIG. 5 is a sectional view showing a dome-shaped speaker that we have separately proposed, and FIG. 6 is a partial sectional view showing a conventional dome-shaped speaker. DESCRIPTION OF SYMBOLS 1...Magnetic circuit part, 2...Yoke, 3...Pole part, 4...Magnet, 5...Top plate, 6...Guide member, 7...Spacer, 8, 9
...Lead wire material, 10a, 10b...Terminal, 20
... Vibration system, 21 ... Dome-shaped diaphragm, 23 ...
Edge part, 24...Voice coil.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A dome-shaped speaker in which a magnetic circuit incorporates a vibration system comprising a dome-shaped diaphragm, a coil bobbin portion, and an edge portion extending horizontally from the lower end of the yoke. The outer circumferential side of the pole part and the inner circumferential side of the lower surface of the top plate are fitted through a fitting guide member made of a non-magnetic and conductive material such as aluminum and a spacer made of an insulating material, and the lead of the voice coil A wiring structure characterized in that the wire is guided along the edge portion, and one of the wires is connected to the yoke side, and the other wire is connected to the top plate side. 2. The wiring structure for a speaker according to claim 1, which is characterized in that a conductive portion with good conductivity is provided on the entire surface or a part of the yoke and the top plate.