JPS5916496A - Assembling method of speaker - Google Patents

Abstract

PURPOSE:To decreas the assembling man-hour, by assembling a damper, a bobbin and a diaphragm to a frame in order from the upper side with a magnetic circuit assembled to the frame in advance for simplifying the assembling work of speaker. CONSTITUTION:The bobbin 12 is inserted in a magnetic gap with an inserting jig 22. Two square rods 23 are provided under a collar 14 of the bobbin 12 in this case and held so as to make the center of the bobbin 12 coincident with the shaft center of the center pole. The bobbin 12 and the damper 21 are fixed with an adhesives. The jig 22 is removed from the bobbin 12. The diaphragm 15 is placed on an upper frame 8 and a ring member 20 is assembled to the frame 6 so as to be fitted to the bobbin 12. The edge 24 is fixed to the frame 8 and the member 20 is fixed to the bobbin 12 respectively. The square rods 23 are removed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an assembly method useful for a loudspeaker (hereinafter referred to as a flat speaker) having a flat diaphragm constructed with a hollow core material having a two-cut structure.

Conventionally, the following method has been known as a general method of assembling a cone-type beam force. As shown in FIG. 1A, first, a magnetic circuit 51 is assembled (-tIf) at the lower end of the inverted circular e ('E f:j)-shaped plate 50.Next, as shown in FIG. 1B, Next, an annular corrugated cord 52 is fixed to the inner circumferential wall of the frame 50 using an adhesive or the like.Next, as shown in FIG.
3, the bobbin 54 wound with
1- Insert the voice coil 53 into the center hole 52A of the tambour 52 so that the voice coil 53 is positioned within the magnetic groove of the magnetic circuit 51, and position the bobbin 54 and the magnetic circuit 51 relative to each other. Then, the bobbin 54 is fixed to the inner peripheral wall of the tamper 52 with an adhesive or the like. Next, the diaphragm 57 formed by joining the elastic etches 56 to the outer periphery i1S is arranged so that its proximal inner circumferential portion 57A is inserted into the bobbin 54, and the etches 56 are attached to the frame 50.
Incorporate and secure so that it is installed on the outer periphery of the After the diaphragm 57 has been assembled in this manner, the jig 55 is removed from the bobbin 54 as shown in FIG. 1D. Finally, the center camp 58 is attached to the upper end opening 54A side of the bobbin 54, and this opening 54A is
It is closed by a cap 58 as shown in Figure E.

Such an assembly method can also be applied to the assembly of a flat speaker, but when applied to this type of speaker, as shown in FIG. It is also necessary to prevent dirt from entering the inside of the speaker.

In particular, in the case of a large flat speaker, the opening 6
The diameter of the opening 1 must be large enough to allow insertion of the large-diameter pohino 63, and a fairly large area of the diaphragm 60 must be opened.

As a result, the effective area of the diaphragm 60 is not automatically narrowed, but by assembling the cap 62 made of a material different from that of the diaphragm 60 into the opening 61, the piston vibration band is wide and excellent. This is not preferable because it impairs the characteristics of the flat speaker, which has excellent acoustic characteristics.

Therefore, as shown in FIG. 3A, the flat-plate speaker has a bobbin 63 wound with a voice coil 64 and a diaphragm 60.
The frame 66 is assembled with the edge 65 fixed in advance.
I'm trying to make a loss on it.

Then, as shown in FIG. 3B, the damper 67 is assembled and fixed between the bobbin 63 and the frame 66, and finally the magnetic circuit 68 is inserted into the magnetic gap of the circuit 68, where the bobbin 63 is inserted. A method is adopted in which it is attached to the lower end of the frame 66 as shown in FIG.

By the way, when the above-mentioned speaker is assembled by such a method, it is not necessary to form the above-mentioned opening 61 in the diaphragm 60, so that the characteristics of the speaker can be maintained. However, the above bobbin 63
In the method of discharging the cap onto the magnetic circuit 61J after discharging the cap onto the frame 66, the relative positioning of the bobbin and the magnetic gear of the magnetic circuit cannot be accurately performed. Therefore, the accuracy of assembling parts such as the pohino 63 and the diaphragm 60 is strict, and since a large number of high-precision jigs are used, the number of man-hours for assembling increases as well, making it relatively expensive.

Therefore, the present invention has been proposed in view of the conventional situation, and aims to enable a speaker to be assembled easily and with high precision without causing deterioration of the acoustic characteristics of the speaker. shall be.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Note that this embodiment is applied to a flat speaker.

Figure 4 shows a partial section 1i of a flat speaker to which the present invention is applied.
FIG. 5 is an enlarged cross-sectional view of the injection circuit, and FIG. 6 is an enlarged external perspective view of the frame. This speaker (magnetic circuit 1 used here) consists of a yoke 3 with a Senku ball 2 upright, an annular Macnet 4 installed on the yoke 3 so as to house the center ball 2, and a center ball 2. Saf Bray 1.5A installed on ball 2 and this Saf Play h5
It consists of a top plate 5B that is placed opposite to A and forms a magnetic gitosog G.

Further, the frame 6 supporting the diaphragm 15, which will be described later, is an annular lower frame t-7, I:, which is assembled and fixed to the top plate 1-511.1-:, and whose diameter is that of the lower frame 7. It consists of an upper frame 8 shaped like a circle 11°1" with a diameter larger than the diameter, and a plurality of (four in the drawings) connecting frames 1, 9, 9, 9.9 that connect each of these frames 7.8. , the whole is formed in the shape of an inverted conical tube. According to the frame 6, the aperture ratio of the back surface of the diaphragm 15 is increased,
The aspiration resistance on the back surface can be kept small, and the characteristics of the speaker can be stabilized.

In addition, each of the connection frames 9, 9. There are arc-shaped reinforcing frames 10,
10, 10.10 are arranged. These valley reinforcing frames 10, 10, 10.10 have cutout recesses ii, t't for receiving and holding square bars 23.23, which will be two supporting jigs to be described later, in predetermined positions. ii and 1i are formed.

Also, the hobbin 12 has -Δ1. ;A voice coil 13 is wound around the outer periphery. In addition to the above pobin 12・1'I
As shown in FIG. 7, a flange 14 is fitted onto the outer periphery of the hobbin 12 so as to protrude in 16 directions perpendicular to the axial center of the hobbin 12. This flange portion 14 is made of, for example, aluminum throat, synthetic 4'DJ fat, etc. to form a thin zebra and is made lightweight.

The diaphragm 15 also includes a core control 6 formed as a honeycomb structure, and skin layers 17 and 18 that are laminated and fixed to the upper and lower open end surfaces of the core material 16.

Further, a plurality of (four in the drawing) connecting pipes 19.1LJ and 19.19 are fixed to the diaphragm 15 with an adhesive or the like so as to form an inverted truncated cone shape as a whole. The valley pipe 19°19.19.19 is connected to the hobbin 12 through the link member 2U. This is now fixed.

Although not shown, the diaphragm 15 and the hobbin 1
2 may be connected with a cylindrical body having an inverted truncated cone shape.

Next, the steps for assembling the speaker 1-11 will be explained step by step.

As shown in FIG. 8, an annular corcation damper 21 is fixed by adhesive or the like to a predetermined position in a frame 6 to which the magnetic circuit 1 is fixed at its coarse side.

Next, the pobbin 12 is inserted by the insertion jig A22 through the center hole 21A of the tamper 21, which is formed between the top brake 1, 5B and the top brake 1, 5A, as shown in FIG. (inside the magnetic gap O). At this time, as shown in FIG.
, 10, 10, 10, the cutout recess it, 11,
Attach two square bars 23.23 to 11.11, and use these two square bars 23.2 to attach the flange 14 of the poinin 12.
The diametrically projecting portions 14A, 14A (see FIG. 7) of the ball are supported by supports, and the center of the pobbin 12 is held in alignment with the axis of the center ball 2. At this time, the hobbin 12 moves in the radial direction, and as shown in FIG. The square rods 23, 23 are positioned so as to sandwich the hobbin 12 so that the hobbin 12 does not fall. Therefore, by forming an arc-shaped recess that matches the outer circumferential shape of the hobbin 12 on one side edge of each of the square rods 23 and 23, which is the hobbin holding part, the hobbin 12 can be supported more stably. .

Then, the pobbin 12 and the tamper 21 are fixed together by adhesive or the like. Note that the work of adhering the hobbin 12 and the tamper 21 is performed by attaching each of the connecting frames 9, 9 .・
...It can be done from the opening between the two, so the above flange part 1
The presence of 4 does not obstruct that work.

Once the hobbin 12 is assembled in this way, the 11th
As shown in the figure, the insertion jig 22 is inserted into the hobbin 12.
Remove from. Note that even if the jig 22 is removed from the hobbin 12, the hobbin 12 is positioned at a predetermined position by the square bars 23' and 23, so the hobbin 12
Assembling the magnetic circuit 1 into the magnetic circuit 1 can maintain accuracy.

24 is installed on the upper frame 8, and the ring member 20 is assembled to the frame 6 so as to fit into the pobbin 12. Then, the edge 24 is fixed to the upper frame 8 of the frame 6 with an adhesive or the like, and the link member 20 and the hobbin 12 are fixed with an adhesive. Finally, each of the square bars 23.23 is removed from the cutout recesses 11, 11, 11.11, and the hobbin 12 is released from support.

In this way, the above embodiment is different from the conventional method (not shown in FIG. The plates 15 can be assembled to the frame 6 one after another from one direction to another, making it easy to assemble the speaker. In addition, the above hobbin 1 is also
Since the diaphragm 15 can be held in a predetermined position until the end of assembly, there is no need to use a special jig when working on the rough side of the diaphragm 15, and the number of jigs can be saved without reducing the number of jigs.
Costume is cheap.

Furthermore, since there is no need to form a bobbin insertion hole in the diaphragm 15 as in the conventional case, there is no deterioration of the acoustic characteristics of the diaphragm.

Further, by providing the flange 14 on the bobbin 12, the heat dissipation effect of the voice coil 13 can be improved, and the mechanical strength of the bobbin 12 can also be improved.

In addition, as shown in FIG. 13, the outer circumference t' of the bobbin 12 is
i1S has a plurality of protrusions 7ηB25, 25 . . . . are fitted with link members 26 disposed at certain intervals in the circumferential direction,
A portion of these troughs TjlS25+25+... may be engaged with the respective rods 23,231 to hold the bobbin 12.

Further, as shown in FIG. 14, the upper ψ11 of the bobbin 12.
1, a plurality of cut and raised pieces 2γ, 2γ, . A part of... for each of the above 1"+'
23, 23 may be engaged to hold the bobbin 12 through. 3. Also, Fig. 15 (t) is not shown. Tsuba? flS28
It may be configured to form. Further, instead of the tape T, a needle /l> may be wound around the outer circumference of the tape 12 (ζ).

In addition, as shown in FIG. 16, the barrel 12 is connected to the large diameter portion 12A (!: A4111 diameter portion 12I) so that an annular stepped portion 29 is formed in the middle of the barrel 12 in the axial direction.
3 may be combined. In this case, the annular stepped portion 29 becomes an engaging portion for each of the square bars 23, 23. Note that the valley diameter portions 12A and 12B may be integrally formed, or may be formed separately and then fitted and fixed together.

It goes without saying that the present invention is also applicable to other speakers such as cone speakers.

As described above, according to the present invention, the speaker can be assembled without forming an opening in the J1 diaphragm.
There is no possibility of deterioration of the acoustic characteristics of the speaker.

Therefore, the acoustic characteristics are sufficient.

Further, according to the present invention, the accuracy of the coarse side of the bobbin and the magnetic circuit can be maintained until the end of speaker assembly by the support jig, so that it is possible to provide a speaker with high assembly accuracy. can.

Further, according to the present invention, after the magnetic circuit is fixed to the frame, the bobbin, diaphragm, etc. can be roughly placed on the frame at predetermined positions, reducing the number of assembly steps and simplifying the speaker assembly process. Become something.

[Brief explanation of drawings]

Fig. 1 is a diagram explaining an example of a conventional assembling method of Subi-h in the order of steps, Fig. 1A is a partial cross-sectional diagram showing the assembled state of the frame and magnetic circuit, and Fig. 1B 1 is a partial cross-sectional side view showing the state in which the bobbin is assembled to the above-mentioned magnetic circuit, FIG. Partial cross-sectional side view showing the state with the jig removed, shown in Fig. 16.
FIG. 2 is a partially sectional side view showing the assembled state (ru). FIG. 2 is an enlarged sectional view of the main part at A5 when the flat plate type Subie J is assembled by the method of [1]1. Figure 3 is a diagram explaining another conventional method of assembling Subi-JJ in the order of steps.
(FIG. 3B is a partially sectional side view showing the state in which the air supply circuit is installed in the above-mentioned Freno motor. FIG. Fig. 5 is a partially cross-sectional exploded side view of the applied flat-plate speaker;
Figure 7 is an enlarged plan view of the IT bobbin, and Figure 8 shows the bobbin assembled into a magnetic circuit.
In the partially cross-sectional side view and hanging diagram showing the state in which the bobbin is inserted into the air supply circuit (a), the part where the 431-hole is inserted into the air supply circuit is enlarged. i
−i% cross-sectional side view showing mirror state, FIG. 11 6; j'
, JI=dynamic, provisional to FR/・, r: + + Some u71i? ii fIll + 1n 1st page 12 Fig. 1j Jl does not indicate the end state, 1yafJ th 1 + i
Side view, No. 3 (-11, 4p showing other examples of Hino)
FIB oblique lN111/1, Figure 14: 4. +1-
Fig. 15 is a perspective view of the main part showing still another example of the bobbin, and Fig. 16 is a perspective view of the main part showing still another example of the bobbin. . 1... Magnetic circuit, 6... Frame, 12. ,, bobbin, 13...whisker coil, 14.28... collar part,
15... Vibration plate, 22... Insertion jig, 23.23
... Square bar, 25 ... Protrusion, 2γ ... Cut and raised piece, 2
9...Annular step. Patent Applicant Sony Corporation Representative Patent Attorney Akira Koike Representative Patent Attorney 1) Toshiei - Figure 2 Figure 4 Figure 13 Figure 15 Figure 14 Figure 7 Figure 16

Claims (1)

[Claims] A flange is provided on the bobbin around which the voice coil is wound, and the bobbin is inserted into the magnetic gap of the magnetic circuit to which the diaphragm support frame is assembled using an insertion jig, and the bobbin and the magnetic circuit are positioned relative to each other. At the same time, the positioning state of the bobbin is maintained by supporting the collar portion with a support jig, and then the insertion jig is removed and the diaphragm is assembled to the support frame and the bobbin, and then the support jig is removed. A speaker assembly method that involves removing the jig.