JPH0633756Y2 - Speaker structure - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) This invention relates to the structure of a speaker, and in particular, the top plate serves as one signal line of the voice coil and the yoke serves as the other signal line. Type speaker structure.

(Prior Art) In order to facilitate speaker assembly and wiring processing,
We previously proposed various types of speakers in which the diaphragm portion, the coil bobbin portion, and the suspension portion extending to the lower end edge thereof are integrally molded, and the outer peripheral portion of the suspension portion is supported inside the magnetic circuit.

In addition, regarding the route of the signal line to the voice coil in this case, a wiring structure in which the top plate and the yoke are electrodes is also proposed.

An example of this will be described with reference to FIGS.
And the coil bobbin portion 32 and the suspension portion 33 at the lower end edge thereof.
Is integrally formed of a heat resistant resin film or the like, and the lead wire 35 of the voice coil 34 is laid on the front surface side and the back surface side of the suspension portion 33. Further, a rising portion is provided on the outer peripheral portion of the suspension portion 33, and this rising portion is used as a guide portion 36 and fitted to the guide portion 46 on the lower surface of the top plate 45 and the guide portion 48 on the outer peripheral portion of the guide ring 47, respectively. By doing so, the suspension portion 33 is sandwiched between the top plate 45 and the guide ring 47. Therefore, the lead wires 35 laid on the front surface and the back surface of the suspension portion 33 are brought into contact with the top plate 45 and the guide ring 47 which is a non-magnetic material and has electrical conductivity, respectively, to be electrically conductive.

As described above, the suspension 33 is arranged inside the magnetic circuit by inserting the inner peripheral portion of the guide ring 47 into the outer periphery of the pole 43 of the yoke 42 while sandwiching the vibration system between the top plate 45 and the guide ring 47. With magnetic gap
49 is held accurately, and the voice coil 34 is supported at the center of the magnetic gap 49. With this configuration,
The top plate 45 and the yoke 42 have a function of one electrode and the other electrode. In the figure, 44 is a magnet.

(Problems to be solved by the invention) However, in the above-described configuration, when the top plates 45 collide with each other in the plating process of the top plate 45, etc., dents are generated in the corners of the guide portion 46, and The marks cause protrusions 50 as shown in FIGS. 7 and 8. Since the protrusion 50 protrudes beyond the set size and the protrusion 50 is extremely sharp, the guide portion 36 of the suspension portion 33 is guided by the top plate 45 and the guide portions 46 and 48 of the guide ring 47 during assembly. When it is pinched, it breaks through the suspension part 33 and the tip is a guide ring.
It contacts 47 and becomes short-circuited.

In the speaker of this type, as described above, the top plate 45 serves as one electrode of the signal line, the yoke 42 serves as the other electrode, and the guide ring 47 serves as the conductive path of the other electrode. The short state caused by the protrusion of the protrusion 50 may be a fatal defect in quality and mass productivity.

The present invention has been made in view of this point, and the purpose thereof is to facilitate and ensure the implementation of the speaker according to our proposal described above, and assemble a speaker excellent in mass productivity and quality. It is to provide a structure of a speaker that can be used.

[Configuration of Device] (Means for Solving Problems) In the structure of the speaker according to the present invention, the top plate serves as one electrode of an input signal to the voice coil and the yoke serves as the other electrode, The guide ring member fitted to the yoke pole portion serves as a conductive path for the other electrode, and the suspension for supporting the diaphragm and the voice coil bobbin is formed by bending the outer peripheral portion at least at the outer peripheral portion thereof. The guide portion is an insulator, and the suspension is provided inside the magnetic circuit by sandwiching the guide portion between the guide portion provided on the outer peripheral portion of the guide ring member and the guide portion provided on the lower surface side of the top plate. In the arranged speaker, the guide ring member and the guide portion of the top plate are shaped to hold the guide portion of the suspension. It has been out of the corners, the at least one of the corners, in which is formed a chamfer or recess and the top plate and moths India rinsed and configured to prevent a short-circuit state.

(Operation) When assembling the speaker, the speaker is similar to the speaker shown in FIGS. 5 and 6 previously proposed, and the rising portion provided on the outer peripheral portion of the suspension is used as the guide portion and the guide portion on the lower surface of the top plate is used. Also, the suspension is sandwiched between the top plate and the guide ring by being fitted to the guide portions on the outer peripheral portion of the guide ring. As a result, the outer periphery of the suspension is interposed as an insulator between the top plate and the guide ring, and the lead wires laid on the front surface and the back surface of the suspension are in contact with the top plate and the guide ring, respectively, for conduction. Becomes

In this case, the guide portion formed by bending the outer peripheral portion of the suspension corresponds to the corner portion of the guide portion of the top plate and the guide ring member, but the chamfered portion or the concave portion is formed at the corner portion. Therefore, unlike the conventional case, the guide portion of the suspension is not pierced by the protrusion or the like, and the top plate and the guide ring member are not short-circuited.

For example, when the chamfered portion is formed at the corner portion of the guide portion of the top plate, the protrusion due to the dent as in the conventional case does not occur. In addition, when the concave portion is formed at the corner portion of the guide portion of the guide ring member and the chamfered portion is not formed at the corner portion of the guide portion of the top plate, the projection portion is temporarily generated at the corner portion of the guide portion of the top plate. Even if this breaks through the guide portion of the suspension, the tip of the protrusion does not come into contact with the guide ring member, and thus the short-circuit state does not occur.

By inserting the inner circumference of the guide ring into the outer circumference of the yoke pole while sandwiching the vibration system between the top plate and the guide ring as described above, the suspension is placed inside the magnetic circuit and the magnetic gap is accurately measured. And the voice coil is supported at the center of the magnetic gap. With such a structure, a speaker in which the top plate and the yoke function as one and the other electrodes can be assembled.

(Embodiment) An embodiment of the structure of the speaker according to the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing an essential part of a vibration system, FIG. 2 is a sectional view showing an essential part, FIG. 3 is a sectional view of an essential part showing another structural example, and FIG. 4 is another structural example. FIG. 3 is a cross-sectional view of a main part showing. Since the configuration other than the main part is the same as the configuration described based on FIGS. 5 and 6, detailed description thereof will be omitted.

In the figure, reference numeral 1 is a diaphragm portion, 2 is a coil bobbin portion, and 3 is a suspension formed on the lower end edge of the coil bobbin portion 2, which are integrally formed of a heat resistant resin film or the like. A guide portion 5 bent in a substantially L-shaped cross section is formed on the outer peripheral portion of the suspension 3, and a voice coil 4 is formed on the coil bobbin portion 2.
One lead wire 4a of the voice coil 4 is on the surface side of the suspension 3, and the other lead wire 4b is on the suspension 3 via a hole 3a formed in the suspension 3.
On the back side of each.

In the magnetic circuit portion, 6 is a magnetic gap, 13 is a yoke pole portion, and an engaging step portion is provided on the outer periphery of the yoke pole portion 13.
16 is formed, and a guide portion 17 composed of a step portion is formed on the lower surface side of the inner periphery of the top plate 15, therefore,
Corner portions 18 are formed on the guide portion 17, but in the example of FIG. 2, the corner portions are chamfered to form chamfered portions 8.

Reference numeral 7 is a guide ring member, which is formed of a non-magnetic material having conductivity, and has an inner peripheral sloped surface portion 7a and a horizontal portion.
7b and a guide portion 7c rising from the outer periphery of the horizontal portion. Therefore, although the corner portion 19 is formed by the horizontal portion 7b and the guide portion 7c, the concave portion 9 is formed in the corner portion 19 in the example of FIG.

In the example of FIG. 3, the chamfered portion 8 is not formed in the corner portion 18 of the top plate 15 and the large recess 9 is formed in the corner portion 19 of the guide ring member 7. Even if a protrusion 20 is formed on the dent 18 and pierces the guide portion 5 of the suspension 3 and protrudes, the tip of the protrusion 20 does not contact the guide ring member 7.

The example of FIG. 4 is an example in which the outer peripheral portion of the suspension 3 is bent downward to form the guide portion 5, and in this type, the guide portion 17 of the top plate 15 is oriented in the opposite direction to that of FIG. 2 and FIG. Further, the guide portion 7c on the outer peripheral portion of the guide ring member 7 is formed downward, and the concave portion 9 is formed in the corner portion 18 of the guide portion 17 of the top plate 15, and the guide portion of the guide ring member 7 is formed. The chamfered portion 8 is formed at each corner 19 of the portion 7c.

With the vibration system held as described above, the inner peripheral edge of the guide ring member 7 is inserted into the yoke pole portion 13 until it is engaged with the engagement step portion 16 to assemble the top plate 15 into the voice plate. The yoke can be used as one electrode of the signal input line to the coil 4 and the other electrode.

Therefore, if the connecting terminals are provided on the yoke and the top plate, the wiring process can be easily performed without complicatedly routing the lead wire, the tinsel wire and the like in the magnetic circuit.

[Advantage of the Invention] According to the structure of the speaker of the present invention, at the time of assembly, the suspension is sandwiched in such a manner that the guide portion formed on the outer peripheral portion of the suspension is fitted to the guide portions of the top plate and the guide ring member, In this state, by inserting the inner circumference of the guide ring into the yoke pole part, the suspension can be placed inside the magnetic circuit, and a predetermined magnetic gap can be formed, so that the voice coil can be accurately positioned at the center of the magnetic gap. Can be placed.

Further, as a result, the top plate serves as one electrode of the signal input line to the voice coil and the yoke serves as the other electrode. However, during the above-mentioned assembly, the guide portion formed by bending the outer peripheral portion of the suspension is the top. Corresponding to the corners on the guide part of the plate and the guide ring member, the chamfered part and / or the concave part is formed on the corner part, so that the guide part of the suspension is protruded by the protrusion part as in the conventional case. The top plate and the guide ring member will not be broken and short-circuited.

Therefore, mass productivity can be improved and quality can be improved.

[Brief description of drawings]

1 to 4 show an embodiment of the structure of the speaker according to the present invention, and FIG. 1 is a perspective view showing a main part of a vibration system, and FIG.
FIG. 4 is a sectional view showing a main part, FIG. 3 is a sectional view of a main part showing another configuration example, and FIG. 4 is a sectional view of a main part showing still another configuration example. 5 and 6 show an example of the speaker that we have previously proposed, FIG. 5 is a perspective view showing a main part of a vibration system, FIG. 6 is a sectional view of a main part showing an exploded state, and FIG. Figures 5 and 6 are the fifth
FIGS. 7A and 7B are cross-sectional views of a main part for explaining a problem at the time of assembling the speaker of FIGS. 6 and 6, and FIG. 7A is a cross-sectional view of a protrusion formed on the top plate, FIGS. 8) is an enlarged cross-sectional view of the same protrusion, and FIG. 8 is a cross-sectional view showing a short-circuited state between the top plate and the guide ring member. 1: Vibration plate part, 2: Coil bobbin part 3: Suspension, 4: Voice coil, 5: Guide part 6: Magnetic gap, 7: Guide ring member 7c: Guide part, 8: Chamfer part, 9: Recessed part 13: Yoke pole Part, 15: Top plate 17: Guide part, 18, 19: Corner part, 20: Projection part

Claims (1)

[Scope of utility model registration request] 1. A top plate serves as one electrode of an input signal to a voice coil and a yoke serves as the other electrode, and a guide ring member fitted to a yoke pole portion serves as a conductive path of the other electrode. In the suspension for supporting the diaphragm and the voice coil bobbin, the guide portion formed by bending the outer peripheral portion at least on the outer peripheral portion is an insulator, and the guide portion is the outer peripheral portion of the guide ring member. In a speaker in which the suspension is disposed inside a magnetic circuit so as to be sandwiched by a guide portion provided on the bottom surface and a guide portion provided on the lower surface side of the top plate, a guide ring for sandwiching the guide portion of the suspension. Of the corners formed on the member and the guide portion of the top plate, at least one corner has a chamfered portion or A speaker structure characterized in that a recess is formed.