JPS62289099A - Speaker - Google Patents

Abstract

PURPOSE:To minimize the distance of taking around an input cord and to scale down a speaker by forming all or some of a forward protecting plate with synthetic resin, inserting a conductive material into the resin part so as to form it and giving a function as a terminal board. CONSTITUTION:The front of a diaphragm 16 is coverted with a gap-like protecting plate 21, and jointed to the outer periphery of a yoke 12. The protecting plate 21 is formed with an insulating synthetic resin, has sound holes 26 in various sizes, and is comprised by insertion-forming conductive materials 19 and 20 formed with thin pieces made of phosphor bronze or brass at the time of formation. The both ends of the conductive materials 19 and 20 are bent so as to be along the lower surface of the outer periphery of the yoke 12, and form connection parts 19a, 19b, 20a and 20b. Voice coil lead wires 22 and 23 are pulled out of the both ends of a voice coil 18 along the diaphragm 16, and connected to the connection parts 19a and 20a by soldering 24. The input cord is inputted to the connection parts 19b and 20b by the soldering 24.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention Field of Industrial Application The present invention relates to speakers used in various types of audio equipment.

2. Description of the Related Art Conventionally, many small speakers, particularly those used in headphones, earphones, etc., have a structure as shown in FIG. 1 or 2 for inputting an input signal to a voice coil. That is, a diaphragm 6 equipped with a voice coil 5 is incorporated into a magnetic circuit 4 constructed by incorporating a laminate of a magnet 1 and a plate 2 into the center of a yoke 3, and a protective plate 7 is attached to the front of this diaphragm 6. , a voice coil lead wire 9 and an input cord 10 were connected to a terminal plate 8 attached to the bottom surface or the bottom surface of the outer peripheral portion of the yoke 3 of the magnetic circuit 4.

The input cord 1o and the voice coil lead wire 9 are connected to the terminal board 8 mainly by soldering or the like, and signals are inputted through the terminal board 8. The reason why the terminal plate 8 is used in this way is mainly to facilitate the joining of the input cord 1o and the voice coil lead wire 9, and to protect the other joining part when joining by soldering.

Problems to be Solved by the Invention However, with the above configuration, especially when used for headphones or earphones, the distance that the input cord 10 is routed over the speaker body becomes long, and it is difficult to fit within the limited volume. When storing it, it is bulky and disadvantageous.

In particular, for earphones that can be inserted into the ear canal, it is important to consider the space for routing the input cord 1o when designing.
This is disadvantageous for downsizing design.

Furthermore, the terminal board 8 used in these small speakers is particularly small and thin, making it difficult to handle when assembling the speaker.

Therefore, the present invention provides a speaker having a structure in which the input cord routing distance is made as small as possible and the terminal board as a single component is eliminated. In order to solve the problem, the present invention provides a diaphragm protection device,
Alternatively, part or all of the net-like or grill-like protection plate provided on the front of the speaker for dustproofing may be formed from a synthetic resin molded product, and a conductive material may be inserted into the resin part to function as a terminal board. It is configured to have

Function As mentioned above, since the conductive material is insert-molded into the synthetic resin part, the function of the input cord routing section is performed by this conductive material, so there is no need for space for the input cord routing, and there is no need for the terminal board. Since this function is also taken over, a terminal board as a single component is no longer necessary.

EXAMPLE A speaker in an example of the present invention will be described below.

In FIGS. 1 to 3, reference numeral 11 denotes a magnetic circuit, and this magnetic circuit 11 is constructed by incorporating a laminate of a magnet 13 and a plate 14 in the center of a yoke 12. A diaphragm 16 is incorporated into the peripheral edge of the yoke 12 of the magnetic circuit 11 via a gasket 16, and a voice coil 18, which is inserted into the magnetic gap 17 of the magnetic circuit 11, is coupled to the diaphragm 16. There is.

On the front side of this diaphragm 16 are two conductive materials 19°20
A cap-shaped protection plate 21 made of a synthetic resin molded product insert-molded is covered and connected to the outer periphery of the yoke 12. Both ends of the conductive material 19°5...20 protrude from the outer peripheral edge of the protection plate 21, and are bent along the lower surface of the outer peripheral part of the yoke 12 to form the connecting portion 1.
9a, 19b, 20a, and 20b are formed.

Further, voice coil lead wires 22 and 23 are led out from both ends of the voice coil 18 along the diaphragm 16, and externally from the notches 21 & 21b at the periphery of the yoke 12 and the periphery of the protection plate 21. It is pulled out and connected to the connecting portions 19a and 20a by solder 24.

Further, an input cord 26 is connected to the other connecting portions 19b and 20b by solder 24.

The above-mentioned protection plate is generally made of metal or synthetic resin, but the protection plate 21 of the present invention is made of insulating synthetic resin, has large and small sound holes 26, and has a layered conductivity when molded. The conductive materials 19 and 20 are formed by insert molding thin pieces of metal such as phosphor bronze or brass. Connecting portions 19a are provided at both ends of the conductive materials 19 and 20.

19b, 20&, 20b are provided, and the connecting portion 19b.

The input cord 25 is connected to the connection part 19a at 20b.

Solder 24 the voice coil lead wires 22 and 23 to 20a.
Connect by. The input signal to the speaker is input code 2
6 to the voice coil lead wires 22 and 23 via conductive materials 19 and 20, and is input to the Walleye coil 18.

4 to 6 show other examples of insert molding of the conductive materials 19 and 20. In FIGS. 1 to 3, the conductive materials 19 and 20 are inserted in the diametrical direction of the protective plate 21, but in FIGS. 4 to 6, they are inserted in the circumferential direction of the protective plate 21. ing.

In this way, instead of using a single synthetic resin for the protective plate 21, by using an insulating synthetic resin for the peripheral edge 21a and insert molding the conductive materials 19 and 20, other parts can be used. Materials, such as punching metal, metal net 2
1b1 etc. can be used.

The conductive material 19, 20 is the connecting portion 19a, 19b, 20a in FIGS. 1-3 and 4-6.

Although the conductive materials 19 and 20 may be simply molded rectangular flat plates, they may also have various cross-sectional shapes, such as circular, oval, square, hexagonal, etc. It may also be a thin stick-like object with a .

Effects of the Invention The speaker of the present invention is constructed as described above, and since this type of speaker requires a protection plate for the diaphragm in some form, the protection plate may be made entirely or partially of synthetic resin. By molding the speaker and inserting a conductor into it, it is possible to eliminate the need for a terminal board as a separate component, and also to minimize the length of the input cord when incorporating this speaker into a small audio device. , the input cord routing space can be omitted, allowing for a more compact design.

[Brief explanation of drawings]

1, 2, and 3 are sectional views, top views, and bottom views of one embodiment of a speaker according to the present invention, and FIGS. 4 to 6 are sectional views of speakers according to other embodiments of the present invention. 7 and 8 are cross-sectional views showing the structure of a conventional speaker, and FIGS. 9 and 10 are cross-sectional views and bottom views showing other conventional speakers. 11... Magnetic circuit, 16... Vibration plate, 18...
... Voice coil, 19 , 20 ... Conductive material, 21 Protective plate, 22 , 23 ... Voice coil lead wire, 26 ... Input cord. Name of agent: Patent attorney Toshio Nakao and one other person

Claims (1)

[Claims] The front of the speaker body, which is constructed by incorporating a diaphragm with a voice coil into a magnetic circuit, has a protective plate made of synthetic resin molded product in the form of a net or grill to prevent dust or protect the diaphragm. , a speaker that inserts and molds a conductive material into this protective plate and uses this conductive material as a medium for input signals.