JPH0670395A - Connection structure between speaker lead wire and terminal metallic fixture - Google Patents

Abstract

PURPOSE:To provide the speaker whose productivity is improved in which useless components are eliminated by improving the connection structure between a speaker lead wire and a terminal metallic fixture. CONSTITUTION:A lead wire 1 cut into a prescribed length set in the design, whose one end is formed with a lock section 7 made of a solder lump and whose other end is coupled with a vibration system 6 is inserted into a notch hole 3 of a terminal metallic fixture 2, and through a gap between the terminal metallic fixture 2 and a projection 4 formed to the terminal metallic fixture 2, the wire 1 is stretched toward the vibration system 6 to latch the lock section 7 with the projection 4 and the through-part of the notch hole 3 of the lead wire 1 is soldered to the terminal metallic fixture 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure for connecting a lead wire and a speaker terminal for supplying a voice current to a voice coil of an electrodynamic speaker, and particularly to improve the productivity of the speaker and to improve the productivity of the lead wire material during assembly. The present invention relates to a connection structure between a lead wire and a speaker terminal, which has a structure for eliminating waste.

[0002]

2. Description of the Related Art A typical connection structure between a lead wire and a speaker terminal of a conventional electrodynamic speaker is, for example, as shown in FIG. 6, a brocaded thread composed of a plurality of conductive wires formed by winding a conductive foil on a cotton thread. A lead wire 1 having a well-known structure called a wire is passed through a cutout hole 3 of a terminal fitting 2 and then through a gap between a projection 4 and the terminal fitting 2 and pulled in a direction of an arrow c, and then the cutout hole 3 is formed. Was soldered, and after the solder was solidified, the surplus portion 5 was cut off.

The lead wire 1 is usually impregnated with solder in a pre-processing step as shown in FIG.

[0004]

In the conventional connecting structure of the lead wire and the terminal fitting having such a structure, as shown in FIG. 6, the lead wire 1 is first placed in the gap between the projection 4 and the terminal fitting 2. When the lead wire is pulled through in the direction of the arrow d, the lead wire between the portion that penetrates the notch hole 3 that serves as the fixing portion of the lead wire 1 and the portion where the lead wire 1 is coupled to the speaker vibration system 6 such as the voice coil. It is necessary to adjust the length of 1 to an appropriate predetermined length so as not to restrain the vibration of the vibrating system 6 and to prevent abnormal vibration from being too long.
Furthermore, there is a problem to be solved that not only a work for cutting off the excess portion 5 after soldering is required but also a waste of the lead wire material corresponding to the excess portion 5 occurs.

Therefore, the present invention solves the above-mentioned drawbacks of the conventional example, and also serves as a temporary fixing to the terminal connection side end portion of the lead wire 1 which is cut to a predetermined length from the beginning and which also serves to prevent loosening of the lead wire. An object of the present invention is to provide a connection structure between a speaker lead wire and a terminal fitting, which solves the above-mentioned problems by forming a preliminary soldering portion for positioning and devising a lead wire arranging work.

[0006]

The connection structure between a speaker lead wire and a terminal fitting according to the present invention for achieving the above object will be described with reference to FIGS. 1 to 7 showing an embodiment. , So as not to restrain the vibration of the vibration system 6 in advance,
In addition, it is cut to a predetermined length set at the time of design so as not to cause abnormal vibration due to being too long, and a locking portion 7 is attached and formed at one end and the other end vibrating system 6 such as a voice coil. Lead wire 1 connected to voice coil wire 6a on the surface of
Through the notch hole 3 of the terminal fitting 2 and the gap between the projection 4 formed on the terminal fitting 2 and the terminal fitting 2, and then pulled in the direction of the vibration system 6 so that the locking portion 7 is caught by the projection 4. In this state, the through-hole 3 of the lead wire 1 is soldered to the terminal fitting 2 to connect the speaker lead wire and the terminal fitting.

In the first embodiment of the present invention, the locking portion 7 is the solder mass 7a, and in the second embodiment, the locking portion 7 is
The solder-impregnated portion 7b is characterized in that the solder-impregnated portion 7b is rolled in the vertical and horizontal directions to have a cross shape when viewed from the axial direction of the lead wire.

[0008]

In the connection structure of the speaker lead wire and the terminal fitting having such a structure, the locking portion 7 is formed at one end of the lead wire 1, and the locking portion 7 is engaged with the protrusion 4 to engage. Since it is temporarily fixed and soldered to the terminal fitting 2 in the stopped state, there is no excess portion 5 in the conventional example, and therefore an extra work for cutting off the excess portion 5 is unnecessary.

Since the lead wire 1 is set to a predetermined length from the beginning, the terminal 7 and the vibrating system can be simply formed by pulling the locking portion 7 until it is caught by the protrusion 4 and soldering it to the terminal 2 to shape it. The lead state of the lead wire 1 between the lead wire and the lead wire is the optimum state set at the time of design, and it is not necessary to adjust the lead state every time the speaker assembling work is performed unlike the conventional case.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. Reference numeral 1 is a lead wire, which is commonly referred to as a tinsel wire, which is a combination of a plurality of conductor wires in which a conductive foil is wound around cotton thread. A flexible conductor having a well-known structure, which has a certain length in advance so as not to restrain the vibration of the speaker vibrating system 6 such as a voice coil and to prevent abnormal vibration from being too long. While being cut into pieces, a spherical solder mass 7a is attached and formed as a locking portion 7 at one end by a pre-processing step, and the other end is joined to the end of the coil wire 6a of the voice coil. 1 and 2 for explaining the present embodiment exemplify the vibration system 6 of the speaker by a voice coil. Therefore, the lead wire 1 is fixed to the side surface of the voice coil bobbin 6b, but is not limited to this. Alternatively, as is well known in a normal dynamic speaker, it may be connected to the end of the coil wire 6a by providing a relay portion on the surface of the cone diaphragm or on another vibration system component such as a damper.

Reference numeral 2 denotes a terminal metal fitting, which has a notch hole 3 into which the lead wire 1 is inserted and soldered, and a projection 4 for holding the lead wire 1 at a predetermined position during a soldering operation.

After the speaker vibrating system is assembled inside the frame, the lead wire 1 is inserted from the open part of the notch hole 3 to the inner part, and then from the open end of the projection 4 in the direction of arrow b, as shown in FIG. The lead wire 1 was pulled into the gap between the protrusion 4 and the terminal fitting 2 and was marked with a dotted line in the figure, after which the lead wire 1 was caught by the locking portion 7 (= solder mass 7a). It is pulled back in the direction of arrow a until the state is reached, and the state described by the solid line is obtained. After that, the portion of the lead wire 1 between the terminal metal fitting insertion portion and the vibration system 6 coupling portion is shaped as shown by arrow c, and the insertion portion of the cutout hole 3 is soldered.

3 to 5 show a second embodiment of the present invention,
In the second embodiment, the engaging portion 7 of the lead wire 1 is rolled in the vertical and horizontal directions as shown in FIG. 3 so as to have a cross shape as viewed from the axial direction of the lead wire as shown in FIG. It is the solder impregnated portion 7b.

With such a shape, as shown schematically in FIG. 5, solder is impregnated into a portion of the lead wire 1 corresponding to the locking portion 7, and two sets of rolling blocks 8, 8 ', 9 ,. It is obtained by rolling in the vertical and horizontal directions by 9 '. The second embodiment has a feature that a preliminary step of attaching solder when forming the locking portion 7 is simple and a conventional work tool can be used as it is.

The connection structure between the speaker lead wire and the terminal fitting according to the present invention has been described above in detail with reference to the typical embodiment. The embodiment of the connection structure according to the present invention is the same as the embodiment described above. The present invention is not limited to the structure, and it can be implemented with appropriate modifications as long as it has the constituent elements described in the above-mentioned claims, exhibits the action referred to in the present invention, and has the effects described below. is there.

[0016]

[Effect] The connection structure between the speaker lead wire and the terminal fitting according to the present invention has the following effects.

(1) Since the locking portion 7 is formed at one end of the lead wire 1, and the locking portion 7 is hooked on the protrusion 4 and locked, it is temporarily fixed and soldered to the terminal fitting 2. Since the surplus portion 5 in the example is not provided, the extra work of cutting off the surplus portion 5 is unnecessary.

(2) Since the excess part of the lead wire is unnecessary,
The cost of lead wire parts can be reduced.

(3) Since the lead wire is set to a predetermined length from the beginning, it is necessary to simply pull on the terminal fitting until it is caught by the protrusion and solder it to the terminal fitting. The lead-through state is the optimum state set at the time of design, and it is not necessary to adjust the lead-through state each time the speaker is assembled as in the conventional case. With the above advantages, the manufacturing cost of the speaker can be reduced and the productivity can be improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a component structure for explaining the structure of the first invention of the present application.

FIG. 2 is a perspective view of a connection structure of a speaker lead wire and a terminal fitting of the first invention of the present application.

FIG. 3 is a perspective view of a main part of a lead wire according to a second embodiment of the invention.

FIG. 4 is a front view in the axial direction of the lead wire according to the second embodiment of the invention.

FIG. 5 is a schematic perspective view showing one processing example of the lead wire of the second invention embodiment.

FIG. 6 is a perspective view of a connection structure of a speaker lead wire and a terminal fitting of a conventional example.

[Explanation of symbols]

 1 lead wire 2 terminal metal fitting 3 cutout hole 4 protrusion 6 speaker vibration system 7 locking part 8, 8'vertical rolling block 9, 9'horizontal rolling block

Claims (3)

[Claims] 1. A connection structure between a lead wire and a terminal fitting in an electrodynamic speaker, which is cut to a predetermined length in advance and has a locking portion (7) attached and formed at one end. Connect the lead wire (1) whose end is connected to the voice coil wire on the surface of the vibration system (6) such as the voice coil to the terminal fitting (2).
After passing through the gap between the notch hole (3) and the projection (4) formed on the terminal fitting (2) and the terminal fitting (2), it is pulled in the direction of the vibrating system (6) and the locking portion (7). Is hooked on the protrusion (4), and in this state, the notch hole (3) penetrating portion of the lead wire (1) is soldered to the terminal fitting (2). Connection structure. 2. The connection structure between a speaker lead wire and a terminal fitting according to claim 1, wherein the engaging portion (7) is a solder mass (7a). 3. The solder-impregnated portion (7b), wherein the locking portion (7) is rolled in the vertical and horizontal directions so as to have a cross shape when viewed from the axial direction of the lead wire (1). The connection structure between the speaker lead wire and the terminal fitting according to claim 1.