JP2001298799A - Speaker manufacturing jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker manufacturing jig that can manufacture a speaker with an excellent sound quality characteristic and having a low total height at a low cost. SOLUTION: Positioning members 2 provided with a fitting section 2a with a thickness equivalent to a distance between a yoke 20 and a voice coil bobbin 23 at a tip of a main body 1 that is inserted to a vent hole 20a of the yoke 20 are supported to be displaced between, a position at which the fitting part 2a is fitted between the yoke 20 and the coil bobbin 23 to position the voice coil bobbin 23, and a position at which the fitting part 2a is escaped to pass through the vent hole 20a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker manufacturing jig, and more particularly to a speaker manufacturing jig suitable for connecting a diaphragm to a voice coil bobbin in a speaker having a seamless structure.

[0002]

2. Description of the Related Art Hitherto, there has been known a speaker having a seamless structure without a hole for inserting a voice coil bobbin in the center of a diaphragm. A method of manufacturing a speaker having such a seamless structure will be described with reference to FIGS.

A yoke 20 and a magnet 21 shown in FIG.
The top plate 22 and the top plate 22 are fixed to each other to form a magnetic circuit. A voice coil 24 wound around a voice coil bobbin 23 is disposed in a magnetic gap of the magnetic circuit.

In order to position the voice coil 24,
A jig (not shown) is fitted between the inner periphery of the voice coil bobbin 23 and the outer periphery of the yoke 20, and dampers 25, 25 bonded to the outer periphery of the voice coil bobbin 23 are fixed to the top plate 22. Adhered to.

After that, the jig is pulled upward from the voice coil bobbin 23 and the voice coil bobbin 23 is supported by the dampers 25, 25, and the voice coil bobbin 23 is inserted into the rib 26a of the diaphragm 26 placed thereon. The diaphragm 26 is adhered to the frame 28 via the edge 29.

In the conventional speaker manufacturing method shown in FIG. 16, when bonding the voice coil bobbin 23 and the diaphragm 26, the voice coil bobbin 23 is supported by the two dampers 25, 25 so that the voice coil bobbin 23 does not tilt. . When only one damper is used, the voice coil bobbin is supported in a planar manner by one damper.
Since the damper is a member that is easily deformed, the voice coil bobbin is easily inclined.

When the voice coil bobbin 23 is supported by the two dampers 25, 25 (double damper), the number of parts increases, and the height of the entire speaker increases, so that the frame material increases, and the voice coil bobbin 23 further increases. Since the distance from the voice coil to the diaphragm increases, sound transmission from the voice coil to the diaphragm deteriorates. Further, there is a problem that it is not possible to lower f ₀ (low sound resonance frequency) due to the large number of supporting materials of the vibration system.

Next, a method of manufacturing the speaker shown in FIG. 17 will be described. In FIGS. 16 and 17, members having the same functions are denoted by the same reference numerals, and detailed description thereof will be omitted. In order to position the voice coil 24 in FIG. 17, a jig (not shown) is fitted between the inner periphery of the voice coil bobbin 23 and the outer periphery of the yoke 20 as in the method described with reference to FIG. However, one damper 25 is bonded to the outer periphery of the voice coil bobbin 23, and the damper 25 is bonded to the frame 28 with the voice coil bobbin 23 positioned.

Then, the jig is pulled out from the voice coil bobbin 23 upward, and the rib 26b provided on the diaphragm 26 is fitted to the jig 30 inserted into the vent hole 20a of the yoke 20 to vibrate. The positioning of the plate 26 is performed. The voice coil bobbin 23 is prevented from tilting by engaging the upper portion of the voice coil bobbin 23 with the rib 26a of the diaphragm 26 positioned as described above. In this state, the diaphragm 26 is bonded to the voice coil bobbin 23 and further to the frame 28 via the edge 29.

In the conventional speaker manufacturing method shown in FIG. 17, since the rib 26b for engaging with the upper portion of the voice coil bobbin 23 is provided on the diaphragm 26, molding conditions become difficult, and the weight of the vibration system increases. There was a problem that the sound quality characteristics deteriorated.

As disclosed in Japanese Patent Application No. 2000-23649, an adapter is attached to the diaphragm in place of the rib 26b, but the weight of the vibration system still increases.

Further, since the diaphragm 26 is positioned by the jig 30 inserted into the vent hole 20a, it is necessary to cut the vent hole 20a to improve its positional accuracy and dimensional accuracy, and the manufacturing cost of the yoke increases. There was a problem of doing.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to manufacture a speaker having good sound quality characteristics and a low overall speaker height at low cost. It is an object of the present invention to provide a speaker manufacturing jig capable of performing the above.

[0014]

A jig for manufacturing a speaker according to the present invention has a thick fitting portion at a distal end of a main body insertable into a vent hole of a yoke at a distance between the yoke and the voice coil bobbin. A plurality of positioning members which are displaceably supported between a position where the fitting portion is fitted between the yoke and the voice coil bobbin to position the voice coil bobbin and a position retracted so as to pass through the vent hole. It is.

In the above jig for manufacturing a speaker,
The positioning member is formed of an L-shaped rigid body, and one end thereof is rotatably supported by the main body.

In each of the speaker manufacturing jigs, the positioning member is biased by a spring and held at a retracted position.

Further, in the jig for manufacturing the speaker, the positioning member is magnetically attracted to the main body and held at a retracted position.

Further, in each of the speaker manufacturing jigs, when the positioning member is at the retracted position, the speaker is inserted into a recess provided in the main body.

Further, in each of the speaker manufacturing jigs, the positioning member is magnetically attracted to the yoke and stably held at a position for positioning the voice coil bobbin.

Further, in each of the speaker manufacturing jigs, the recesses and protrusions provided on the positioning member and the main body are fitted after being elastically deformed, and the positioning member is stably positioned at a position for positioning the voice coil bobbin. It is what is kept.

Furthermore, in the jig for manufacturing a speaker according to the present invention, a flexible sheet having a thickness between the yoke and the voice coil bobbin is fixed to a tip end of a main body which can be inserted into a vent hole of the yoke. The flexible sheet is configured to be displaceable between a position for positioning the voice coil bobbin by fitting between the yoke and the voice coil bobbin at a plurality of positions and a position retracted to be able to pass through the vent hole.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A speaker manufacturing jig according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a speaker manufacturing jig according to a first embodiment of the present invention, and FIG. 2 is a sectional view showing a use state of the speaker manufacturing jig.

The main body 1 shown in FIGS. 1 and 2 is formed of a round bar made of resin or metal, and bosses 1a, 1a,.
Are rotatably supported. The positioning members 2, 2,... Are made of resin or metal, and are formed in an L-shape. The fitting portions 2 at the tips of the positioning members 2, 2,...
a is positioned between the voice coil bobbin 23 and the yoke 20 shown in FIG.

As shown in FIG. 2, the voice coil bobbin 23
In a state where is positioned, the periphery of the damper 25 adhered to the voice coil bobbin 23 is adhered to a frame (not shown), and the diaphragm is arranged such that the upper end of the voice coil bobbin 23 is fitted to the rib 26 a of the diaphragm 26. 26, the voice coil bobbin 23 is bonded to the rib 26a of the diaphragm 26, and the peripheral edge of the diaphragm 26 is bonded to a frame (not shown) via an edge (not shown).

After the diaphragm 26 having the seamless structure is bonded to the voice coil bobbin 23, the jig constituted by the main body 1 and the positioning members 2, 2,.
.. In this case, the positioning members 2, 2,... Are rotated upward as shown by the dotted lines in FIG.

That is, when the main body 1 is slightly pushed up, the positioning members 2, 2,... Then, when the main body 1 is pulled downward, the distal ends of the positioning members 2, 2,... Remain upward due to the frictional force with the voice coil bobbin 23, and the positioning members 2, 2,.

When the main body 1 is pulled downward, the positioning members 2, 2,... Are lowered by being dragged by the main body 1, but when the inclined surface hits the yoke 20, the positioning members 2, 2,. As shown by the solid line, the jig is
Can be extracted from

As described above, since the voice coil bobbin 23 is bonded to the diaphragm 26 in a state where it is positioned on the jig, that is, in an upright state, the position of the voice coil 24 can be easily positioned at a predetermined position.

Further, since a double damper is not used, it is easy to reproduce even a low tone range. Also, there is no need to increase the height of the entire speaker. Further, the number of parts and the shape of the parts are prevented from being increased.

FIG. 4 is a perspective view showing a speaker manufacturing jig according to a second embodiment of the present invention. In this example, body 3
Are rotatably supported on the boss 3a. The function is the same as in the first embodiment, but
Since the number of the positioning members 2, 2,... Is small, the weight and the manufacturing cost are reduced. Note that the greater the number of positioning members, the higher the positioning accuracy of the voice coil.

FIG. 5 is a perspective view showing a jig for manufacturing a speaker according to a third embodiment of the present invention. In this example, the main body 4
Positioning members 2 and 2 having two fitting portions 2a are rotatably supported on the boss 4a. The function is the same as in the first embodiment. In this way, at least two positioning members 2, 2 are rotatably supported by the main body 4 so that
The effects of the present invention can be obtained.

FIG. 6 is a perspective view showing a speaker manufacturing jig according to a fourth embodiment of the present invention. In this example, the body 5
Is formed of a square bar having a square cross section, and the boss 5 of the main body 5 is formed.
a positioning members 2, 2 having fitting portions 2a
Are rotatably supported. The diagonal length of the cross section of the main body 5 is slightly shorter than the diameter of the vent hole of the yoke.

The weight of the jig can be reduced by forming the main body 4 with a square bar.

FIG. 7 is a sectional view showing a speaker manufacturing jig according to a fifth embodiment of the present invention. In this example, the body 6
The two bosses 6a rotatably support two positioning members 2, 2. The body 6 is provided with a transport handle 6b. With such a configuration, the jig can be easily transported from the jig storage place to the assembling place, and the setting of the jig at the time of assembly is also facilitated.

FIG. 8 is a sectional view showing a speaker manufacturing jig according to a sixth embodiment of the present invention. In this example, the body 7
The two positioning members 2, 2 are rotatably supported by the boss 7a. The positioning member 2, 2,
Are provided with recesses 7b, 7b that fit when the device is in the retracted position. The positioning members 2, 2 rotate in the direction of the arrow shown by the weight to reach the retracted position. In this example, the positioning members 2, 2 are reliably prevented from being caught on the yoke.

FIG. 9 is a sectional view showing a speaker manufacturing jig according to a seventh embodiment of the present invention. In this example, the body 8
The two positioning members 10, 10 are rotatably supported by the boss 8a. The spring 9 is hung between the convex portion 8b of the main body 8 and the convex portion 10b of the positioning member 10.

When the fitting portion 10a of the positioning member 10 is at the position for positioning the voice coil bobbin, the angle between the operating direction of the spring 9 and the direction of the operating point from the center of rotation is small, and the spring 9 exerts an influence on the positioning member 10. Although the torque is small, when the positioning member 10 is pivoted slightly upward, the angle increases, the torque exerted on the positioning member 10 by the spring 9 increases, and the positioning member 10 is rotated by the elastic force of the spring 9. In this example, the positioning members 10, 10
Is reliably prevented from being caught on the yoke.

FIG. 10 is a sectional view showing a speaker manufacturing jig according to an eighth embodiment of the present invention. In this example, positioning members 11, 11 having two fitting portions 11a are rotatably supported on a boss 4a of the main body 4. The magnets 12 and 1 are respectively attached to the positioning members 11 and 11.
2 is attached. When the positioning member 12 is rotated upward, the magnets 12, 12 are attracted, and the positioning members 11, 11 are securely held at the upper rotation position, and are reliably prevented from being caught on the yoke.

When the fitting portion 11a of the positioning member 11 is located at the position for positioning the voice coil bobbin, the magnets 12 and 12 attract the yoke and cause the positioning member 11 to move.
Position becomes stable.

FIG. 11 is a sectional view showing a speaker manufacturing jig according to a ninth embodiment of the present invention. In this example, the main body 13 is composed of a magnetic core 13d and a resin molding 13 covering the core 13d.
c. Two positioning members 14, 14 having a fitting portion 14a on a boss 13a provided on the resin molding portion 13 are rotatably supported. Magnets 12, 12 are attached to the positioning members 14, 14, respectively.

The resin member 13c has a positioning member 14,
Recesses 13b, 1 fitted when 14 is in the retracted position
3b is provided. The positioning members 14, 14 are rotated in the direction of the arrow shown in the figure by their weights, moved to the retracted position, fitted into the recesses 13 b, 13 b,
Due to the suction force of No. 12, the position is stably held.

In this example, the positioning members 14, 14 are reliably prevented from being caught on the yoke.

FIG. 12 is a sectional view showing a speaker manufacturing jig according to a tenth embodiment of the present invention. In this example, positioning members 11, 11 having two fitting portions 11a are rotatably supported on a boss 4a of the main body 4. The magnets 12 and 12 having opposite poles to the magnets are respectively attached to the positioning members 11 and 11. When the positioning member 12 is rotated upward, the magnets 12 and 12 are attracted,
The positioning members 11, 11 are securely held at the upper rotation position, and are reliably prevented from being caught on the yoke.

When the fitting portion 11a of the positioning member 11 is at the position for positioning the voice coil bobbin, the magnets 12
The position of the positioning member 11 is stabilized by adsorbing the position 12.

FIG. 13 is a sectional view showing a jig for manufacturing a speaker according to an eleventh embodiment of the present invention. In this example, positioning members 11, 11 having two fitting portions 11a are rotatably supported on a boss 4a of the main body 4. Then, the recesses 11b, 11 provided in the positioning members 11, 11
b and the projections 4b, 4b provided on the main body 4 are fitted after being elastically deformed at one end.

When the fitting portion 11a of the positioning member 11 is located at the position for positioning the voice coil bobbin, the recesses 11b, 11b and the projections 4b, 4b are fitted to each other to attract and stabilize the position of the positioning member 11. When the main body 4 is pulled out from the vent hole of the speaker, the main body 4 is pulled out with a little strong force, so that the dents 11b, 11b and the projections 4b, 4b
The connection with b is released.

FIG. 14A is a plan view showing a loudspeaker manufacturing jig according to a twelfth embodiment of the present invention, and FIG.
It is a front view of the jig for speaker production. In this example, a flexible sheet positioning member 16 having six branches is fixed to the tip of the main body 15.

As shown in FIG. 15, the positioning member 16 is pressed by a jig 27 so that the voice coil bobbin 23 and the yoke 2
0, and the voice coil bobbin 23 is positioned.

In this state, the voice coil bobbin 23 is bonded to the diaphragm. Thereafter, the main body 15 is pushed up to pull out the positioning member 16 from between the voice coil bobbin 23 and the yoke 20, and further, the main body 15 can be pulled out from the vent hole of the yoke 20. At this time, the positioning member 16 is deformed and does not interfere with the yoke 20. In this example, since the configuration is simple, the manufacturing cost of the jig can be reduced.

[0050]

According to the jig for manufacturing a speaker of the present invention, the voice coil can be mounted at a normal position without positioning the diaphragm of the seamless structure speaker with the jig. There is no need to provide it, and the weight of the vibration system can be reduced. Therefore, the reproduction of the bass range is facilitated, the sound quality of the woofer can be mainly improved, and the degree of freedom of the forming condition of the diaphragm increases.

In addition, cutting work for improving the accuracy of the vent hole of the yoke is not required, and the manufacturing cost of the yoke is reduced. Further, since the jig can be set from above the speaker, the assembly process is simplified.

Further, since no double damper is used,
The height of the speaker can be reduced, and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing a speaker manufacturing jig according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a use state of the speaker manufacturing jig.

FIG. 3 is a cross-sectional view showing another state when the speaker manufacturing jig is used.

FIG. 4 is a perspective view showing a jig for manufacturing a speaker according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing a jig for manufacturing a speaker according to a third embodiment of the present invention.

FIG. 6 is a perspective view showing a speaker manufacturing jig according to a fourth embodiment of the present invention.

FIG. 7 is a sectional view showing a speaker manufacturing jig according to a fifth embodiment of the present invention.

FIG. 8 is a sectional view showing a jig for manufacturing a speaker according to a sixth embodiment of the present invention.

FIG. 9 is a sectional view showing a speaker manufacturing jig according to a seventh embodiment of the present invention.

FIG. 10 is a sectional view showing a speaker manufacturing jig according to an eighth embodiment of the present invention.

FIG. 11 is a sectional view showing a loudspeaker manufacturing jig according to a ninth embodiment of the present invention.

FIG. 12 is a sectional view showing a speaker manufacturing jig according to a tenth embodiment of the present invention.

FIG. 13 is a sectional view showing a speaker manufacturing jig according to an eleventh embodiment of the present invention.

14 (a) is a plan view showing a loudspeaker manufacturing jig according to a twelfth embodiment of the present invention, and FIG. 14 (b) is a front view showing the loudspeaker manufacturing jig.

FIG. 15 is a sectional view showing a use state of the speaker manufacturing jig.

FIG. 16 is a cross-sectional view for explaining a conventional speaker manufacturing method.

FIG. 17 is a cross-sectional view for explaining another conventional speaker manufacturing method.

[Explanation of symbols]

Reference Signs List 1 body, 1a boss 2 positioning member, 2a fitting portion 3 body, 3a boss 4 body, 4a boss, 4b projection 5 body, 5a boss 6 body, 6a boss, 6b handle 7 body, 7a boss, 7b recess 8 body, 8a boss, 8b convex portion 9 spring 10 positioning member, 10a fitting portion, 10b convex portion 11 positioning member, 11a fitting portion, 11b recess 12 magnet 13 main body, 13a boss, 13b recess, 13c resin molding portion 13d core 14 positioning Member, 14a Fitting portion 15 Body 16 Positioning member 20 Yoke, 20a Vent hole 21 Magnet 22 Top plate 23 Voice coil bobbin 24 Voice coil 25 Damper 26 Vibration plate, 26a, 26b Rib 27 Jig 28 Frame 29 Edge 30 Jig

Claims (8)

[Claims] A plurality of positioning members each having a thick fitting portion at a distance between a yoke and a voice coil bobbin are provided at a distal end portion of a main body which can be inserted into a vent hole of a yoke. A speaker manufacturing jig, which is supported so as to be displaceable between a position where the voice coil bobbin is positioned by being fitted between the coil bobbin and a position where the voice coil bobbin is retracted so as to pass through the vent hole. 2. The speaker manufacturing jig according to claim 1, wherein said positioning member is formed of an L-shaped rigid body, and one end of said positioning member is rotatably supported by said main body. 3. The jig for manufacturing a speaker according to claim 1, wherein the positioning member is biased by a spring and held at a retracted position. 4. The speaker manufacturing jig according to claim 1, wherein said positioning member is magnetically attracted to said main body and held at a retracted position. 5. The jig for manufacturing a speaker according to claim 1, wherein said positioning member is inserted into a recess provided in said main body when said positioning member is at a retracted position. 6. The speaker manufacturing jig according to claim 1, wherein the positioning member is magnetically attracted to the yoke and stably held at a position for positioning the voice coil bobbin. 7. The positioning member according to claim 1, wherein the recesses and projections provided on the positioning member and the main body are fitted after being elastically deformed, and the positioning member is stably held at a position for positioning the voice coil bobbin. A jig for manufacturing a speaker according to any one of the above. 8. A flexible sheet having a thickness between a yoke and a voice coil bobbin is fixed to a distal end portion of a main body which can be inserted into a vent hole of the yoke. A speaker manufacturing jig configured to be displaceable between a position where the voice coil bobbin is positioned by being fitted between the coil bobbin and a position retracted so as to pass through the vent hole.