JPH075760Y2 - Voice coil structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a structure of a voice coil for a speaker.

[Prior Art] A conventional voice coil will be described with reference to FIG. 7. A coil member 22 is formed by winding a wire material around a coil bobbin 21, and a wire wire end portion side of a winding start end 22a and a winding end end 22b is used as a lead wire 23. After gathering on the front side of the wire and forming, the lead wire 23 is fixed by winding the reinforcing paper 24 around the coil bobbin 21, the insulating material on the free end side of the lead wire 23 is peeled off, and the peeled portion 28H is subjected to solder coating treatment. Those that have been subjected to etc. are general.

When incorporated in a magnetic circuit, as shown in FIG. 8, the voice coil 20 is set on a jig S (spacer) for arranging the voice coil 20 at the center of the magnetic gap 31, and this is set in the yoke pole portion 32 of the magnetic circuit component. Insert the cone paper in this state
The neck portion of 33 is inserted into the upper end portion of the voice coil 20, and the tinsel wire 34 is passed through the cone paper 33 to connect with the lead wire 23. In the figure, 35 is a damper, 36 is a frame, and 37 is an input terminal.

[Problems to be Solved by the Invention] In the conventional general voice coil 20 described above, since the end portion of the lead wire 23 is free, a guide for positioning the lead wire end portion during assembly. There is no such thing as
Therefore, when automating the assembly, the voice coil 20
The shape is extremely unsuitable for determining the circumferential angle of and the position of the input terminal 37. For this reason, it is the current situation that the operator visually confirms the setting at the time of assembling, and the cost of the automatic assembling apparatus increases significantly in order to automatically perform the setting confirmation. There is.

An object of the present invention is to provide a voice coil for a speaker, which is suitable for automating the assembly by improving the above-mentioned conventional drawbacks.

[Means for Solving the Problems] In the voice coil structure according to the present invention, in a voice coil of a moving coil type speaker, two or more engaging portions each having a notch or a hole are formed on the upper end side of the voice coil bobbin. , A voice coil lead wire arranged on the side surface of the voice coil bobbin or a conductive terminal portion made of a conductive material to which the lead wire is connected, one pole of which is one engaging portion and the other pole is the other. Positioning is carried out at the joints so as to correspond to each other, and the engaging claws provided on the rotating jig for positioning for automatic assembly engage with the engaging parts and rotate to a predetermined position for positioning. It is configured to be performed.

[Operation] One and the other engaging portions formed of notches or holes are formed on the upper end side of the coil bobbin, and the lead wire of the voice coil or the conductive terminal portion made of a conductive material to which the lead wire is connected has one pole. Is positioned and arranged so as to correspond to the one engaging portion and the other pole to the other engaging portion, respectively.

When the rotating jig is rotated during automatic assembly, the engaging claw of the rotating jig engages with the engaging part of the coil bobbin, and by rotating the rotating jig to a predetermined position in this state, the voice coil rotates and the conductive terminal The poles of the part are positioned. That is, since the positions of the respective poles of the conductive portion led from the input terminal provided on the frame and the conductive terminal portion match, soldering may be performed in this state.

[Embodiment] An embodiment of the voice coil according to the present invention will be described with reference to FIGS. 1 to 6.

Engagement portions 3a and 3b formed of notches or holes at two or more locations (two locations at symmetrical positions in the embodiment) are provided on the upper end side of the coil bobbin 2 in the voice coil 1. In the embodiment, the engaging portions 3a and 3b are formed by cutting out the upper edge 2a of the coil bobbin 2. In this case, the width of one engagement portion 3a is made wider than the width of the other engagement portion 3b.

The coil portion 4 is formed by winding the coil bobbin 2 formed in this way, and the conductive terminal portion 5a made of a conductive material (copper foil in the embodiment) to which one of the lead wires 4a is connected is the above-mentioned one. The conductive terminal portion 5b made of a conductive material (copper foil), which is positioned and arranged so as to correspond to the engaging portion 3a and is connected to the other lead wire (not shown), is provided on the other engaging portion 3b. Positioned and arranged correspondingly.

That is, in this embodiment, as shown in FIG. 1, copper foils 5 and 5 are attached to the side surfaces of the coil bobbin 2 so as to be located below the engaging portions 3a and 3b, and one lead is provided for each. The wire 4a and the other lead wire (not shown) are connected to each other, and the notch portions 12a and 12b are provided in a part of the reinforcing paper 12 from the lower edge to expose the copper foil, whereby the one engaging portion 3a The conductive terminal portion 5a is installed in the lower portion, and the conductive terminal portion 5b is installed in the lower portion of the other engaging portion 3b. In the embodiment, the engaging portions are installed at symmetrical positions, but the installation direction, the number of installation locations, the shape, etc. are free.

The voice coil 1 configured as described above is incorporated in the magnetic circuit as follows. In the embodiment, a damper 6 as shown in FIG. 4 previously proposed by us, that is, a voice coil is provided on the front surface side of the corrugation damper main body 6a in order to facilitate wiring processing of the speaker unit. The input terminal lugs 17a, 17b provided on the frame 16 are used by using the damper 6 provided with the input signal paths 7a, 7b (in the case of the present embodiment, a braided thread knitted in a flat net shape) in two directions (symmetrical directions). Are also provided in symmetrical positions.

First, when arranging the voice coil 1 in the magnetic gap 31, the voice coil 1 is set on the jig (spacer) S so that the voice coil 1 is arranged at the center of the magnetic gap 31, and the yoke of the magnetic circuit component is set. Insert into the pole part 32.
In this state, in order to align with the input terminal lugs 17a and 17b, the coil bobbin 2 is rotated by covering the coil bobbin 2 with the rotating jig T from above.

In this case, the rotating jig T is provided with engaging claws T1 and T2 having a width that fits in the engaging portions 3a and 3b, respectively. Therefore, as shown in FIG. When the position of the dowel T1 is aligned with the input terminal lug 17a and the product is rotated 360 ° while applying a suitable pressure with the alignment point as the start point ST, the width of the engaging portion 3a and the engaging portion 3a as described above. Since the width of 3b is different, even if the narrow engaging claw T2 comes over the wide engaging portion 3a, the wide engaging claw T1 located on the opposite side has a narrow width. Since the engaging claw T2 is not fitted to the engaging portion 3b, the engaging claw T2 does not fit to the engaging portion 3a. That is, regardless of the orientation of the voice coil 1 in which the engaging portions 3a and 3b are arranged, the rotary jig T makes one rotation (locking claw T).
While the T and T2 make one turn, the engaging claw T1 is surely fitted to the engaging part 3a and the engaging claw T2 is fitted to the engaging part 3b, and returns to the start point ST.

That is, the rotation of the rotary jig T is stopped with the engaging portion 3a aligned with the input terminal lug 17a and the engaging portion 3b aligned with the input terminal lug 17b. On the other hand, as described above, the conductive terminal portion 5a of the voice coil 1 is arranged below the engaging portion 3a, and the conductive terminal portion 5b is arranged below the engaging portion 3b. The positions and polarities of the conductive terminal portions 5a and 5b always match the positions and polarities of the input terminal lugs 17a and 17b.

After the alignment is performed as described above, the damper 6 having the input signal paths 7a and 7b attached thereto is inserted into the coil bobbin 2 along the corrugated portion. At this time, damper 6
The input signal paths 7a and 7b are also bidirectional (symmetrical) as described above.
Therefore, it is possible to extremely easily align the positions of the conductive terminal portions 5a and 5b arranged on the coil bobbin 2 with the input signal paths 7a and 7b of the damper 6 when the damper 6 is inserted. Further, as a result, the end portions of the input signal paths 7a and 7b located on the inner peripheral portion of the damper are brought into contact with the conductive terminal portions 5a and 5b of the coil bobbin 2, and the end portions of the input signal paths 7a and 7b located on the outer peripheral portion of the damper are contacted. Are the input terminal lugs 17a, 17b of frame 16
Therefore, the conductive portions are electrically coupled with each other by soldering or the like.

In the case of the present embodiment, an example in which the damper 6 as shown in FIG. 4 is used is shown, but a general conventional wiring form such as connecting a voice coil lead wire with a tinsel wire through a cone paper is used. Also, a hole may be provided in the vicinity of the top end of the coil bobbin 2 as the engaging portions 3a and 3b. In this case, if the structure of the rotating jig T is considered. The same effect can be obtained. The engaging part
Even when the cutouts are provided on the top end edge of the coil bobbin 2 as 3a and 3b, the sizes may be the same, and the cutouts may be formed in a substantially "L" shape by the vertical side and the inclined side. In order to form a mold, the engaging claws T1 and T2 of the rotating jig T are formed in a shape corresponding to the "L" -shaped engaging portion, and the rotating jig T is rotated in one direction. Good.

[Advantage of the Invention] According to the present invention, the lead wire of the voice coil or the conductive terminal portion made of a conductive material to which the lead wire is connected and the input terminal provided on the frame are mechanically positioned and aligned in polarity. Therefore, it is extremely effective for automatic assembling and exhibits excellent effects such as reduction in the number of assembling steps and cost reduction.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is a perspective view of the entire voice coil, FIG. 2 is a sectional view showing an assembling means, and FIG. 3 is a view showing a state of joining with a damper. 4 is a perspective view of the damper, FIG. 4 is a plan view of the damper, FIG. 5 is an explanatory view showing the relationship between the engaging portion of the coil bobbin and the engaging claw of the rotating jig, and FIGS. 6 (A) to 6 (D) are It is a top view which shows the positional relationship of an engaging part and an engaging claw when a rotating jig is rotated. FIG. 7 is a perspective view showing a conventional voice coil, and FIG. 8 is a sectional view showing a conventional voice coil assembling means. 1: voice coil, 2: coil bobbin, 3a, 3b: engaging portion, 4: coil portion, 5a: one conductive terminal portion, 5b: the other conductive terminal portion,
6: Damper, 7a, 7b: Input signal path, 12: Reinforcing paper, T: Rotating jig, T1, T2: Engaging claw

Claims (4)

[Scope of utility model registration request] 1. A voice coil of a moving coil type speaker, wherein a voice coil lead wire or a voice coil lead wire arranged on a side surface of the voice coil bobbin is formed by forming two or more engaging portions each having a notch or a hole on the upper end side of the voice coil bobbin. The conductive terminal part made of a conductive material to which the lead wire is connected is installed with one pole corresponding to one engaging part and the other pole corresponding to the other engaging part. A voice coil structure characterized in that an engaging claw provided on a rotary jig for positioning for automatic assembly engages with the engaging portion. 2. The structure of the voice coil according to claim 1, wherein the one engaging portion and the other engaging portion have different sizes. 3. The voice coil according to claim 1, wherein the engaging portions are formed at two symmetrical positions, and the conductive terminal portion is a copper foil to which a lead wire of the voice coil is connected. Structure. 4. The structure of a voice coil according to claim 1, wherein the engaging portion is formed by a substantially "L" -shaped notch portion by the vertical side and the light hypotenuse.