JPH0635599Y2 - Speaker structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a structure of a speaker, and more particularly, to a structure of a speaker in which a top plate serves as one signal line of a voice coil and a yoke serves as the other signal line. It is about.

(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 extended to the lower end edge thereof are integrally molded, and the outer peripheral portion of this suspension 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 using the top plate and the yoke as electrodes is also separately proposed.

An example of this will be described with reference to FIGS.
The coil bobbin portion 32 and the suspension 33 at the lower end edge of the coil bobbin portion 32 are integrally molded with a heat resistant resin film or the like,
The lead wires 35 of 34 are laid on the front and back sides of the suspension 33. Further, a rising portion is provided on the outer peripheral portion of the suspension 33, and the rising portion is used as the guide portion 36 and is 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 member 47, respectively. This holds the suspension 33 between the top plate 45 and the guide ring member 47. Therefore, the lead wires 35 laid on the front and back surfaces of the suspension 33 are connected to the top plate 45.
Also, the guide ring member 47, which is a non-magnetic material and has conductivity, comes into contact with the guide ring member 47 to conduct electricity.

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

(Problems to be solved by the invention) However, in the above configuration, the guide ring member 47 is used.
Since the inner diameter portion 47n and the outer peripheral portion 43g of the yoke pole portion 43 are fitted to each other with the fitting dimensions set, the clearance dimension l of both parts is extremely narrow, and therefore, delicateness is required in the fitting work. To be done. In addition, if the clearance dimension of each part is set to be large in order to simplify the fitting work, contact failure occurs between the inner diameter portion 47n of the guide ring member 47 and the outer peripheral portion 43g of the yoke pole portion 43, and the voice signal is voiced. It becomes impossible to transmit to the coil 34, and it does not function as a speaker.

In this type of speaker, 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 link member 47 serves as the conductive path of the other electrode. The above-mentioned contact failure may be a fatal defect in quality and mass productivity.

The present invention has been made in view of this point, and an object thereof is to provide a speaker structure that can more easily and surely implement the speaker according to our proposal described above. It is in.

(Means for Solving Problems) In the structure of the speaker according to the present invention, the outer peripheral portion of the vibration system suspension is held between the outer peripheral portion of the guide ring member fitted to the yoke pole portion and the lower surface side of the top plate. Thus, in the speaker in which the suspension is disposed inside the magnetic circuit, the top plate serves as one electrode of the input signal to the voice coil, and the yoke serves as the other electrode, the guide ring member serves as the other electrode. It is a conductive path, and the outer diameter of the contact portion of the yoke pole portion with the guide ring member and the inner diameter of the guide ring member are made different so that the guide ring member and the yoke pole portion are fitted in a strong pressure state. It has a fitting structure for fitting.

As the fitting structure, a tapered portion or an arcuate portion is formed on the inner peripheral edge of the guide ring member to make the inner diameter portion thin, and the guide ring member is forcibly deformed when fitted. By the elastic force of the guide ring member that accompanies this forced deformation, the contact between the inner diameter portion of the guide ring member and the outer peripheral portion of the yoke pole portion can be brought into a strong pressure state.

Further, as another means, a tapered portion is formed on the outer peripheral portion of the yoke pole portion, and the inner diameter portion of the guide ring member is press-fitted into the outer peripheral portion, or an engaging step is formed on the outer peripheral portion of the yoke pole portion. It is also possible to form the portion at a slightly higher position and press-engage it with the engagement step portion by the elastic force that accompanies the forced deformation when the guide ring member is fitted.

(Operation) When assembling the speaker, it is similar to the previously proposed speaker, and the rising portion provided on the outer peripheral portion of the suspension is used as a guide portion and the guide portion on the lower surface of the top plate and the outer peripheral portion of the guide ring member are guided. The suspension is sandwiched between the top plate and the guide ring member by being fitted in the respective parts. As a result, the outer peripheral portion of the suspension is interposed as an insulator between the top plate and the guide ring member, and the lead wires laid on the front surface and the back surface of the suspension contact the top plate and the guide ring member, respectively, for conduction. Will be done.

As described above, the inner diameter portion of the guide ring member is made to correspond to the outer peripheral portion of the yoke pole portion while the vibration system is sandwiched between the top plate and the guide ring member, and the top plate is set on the magnet member in this state. Even if there is a clearance between the top plate and the magnet member, the top plate is surely attracted and fixed by its magnetic attraction when magnetized to the magnet member. At this time, the inner diameter portion of the guide ring member is forcibly deformed, and the inner diameter portion of the guide ring member is pressed against the outer peripheral portion of the yoke pole portion in a strong pressure state by the elastic force accompanying the forced deformation.

By assembling as described above, the suspension is arranged inside the magnetic circuit, the magnetic gap is accurately held, 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 sectional view showing an essential part of a speaker structure, FIGS. 2 (A) to (F) are sectional views showing an essential part showing various sectional shapes of an inner diameter portion of a guide ring member, and FIG. 3 (A), FIG. 4B is a sectional view of a main part showing a fitting form of the guide ring member, and FIG. 4 is a sectional view of a main part showing another fitting form of the same. Since the configuration other than the main part is the same as the configuration described based on FIGS. 5 to 7, detailed description thereof will be omitted.

In the figure, reference numeral 1 indicates the entire vibration system, in which a diaphragm portion 11, a coil bobbin portion 12 and a suspension 13 are integrally molded with a heat resistant resin film or the like, and a voice coil is formed on the coil bobbin portion 12.
14 are formed. One lead wire of the voice coil 14 is laid on the front surface side of the suspension 13, and the other lead wire is laid on the back surface side of the suspension 13 through a hole formed in the suspension 13.

In the magnetic circuit part, 2 is a yoke, 3 is a yoke pole part, and 4 is an outer peripheral part of the yoke pole part 3. Reference numeral 5 is a top plate, and a guide portion 15 composed of a step portion is formed on the inner peripheral lower surface side. 6 is a magnet and 16 is a magnetic gap.

The guide ring member 7 is formed of a non-magnetic material and a conductive material. The guide ring member 7 includes an inner diameter portion 7a formed of an inclined surface, a horizontal portion 7b, and a guide portion 7c rising from the outer periphery of the horizontal portion. The inner diameter portion 7a is assembled with the outer peripheral portion 4 of the yoke pole portion 3 by assembling.

In this invention, the inner diameter portion 7a of the guide ring member 7 is
As a fitting structure 8 between the yoke pole portion 3 and the outer peripheral portion 4 of the yoke pole portion 3,
The inner diameter portion 7a is press-fitted to the outer peripheral portion 4 in a strong pressure state. In the example of FIGS. 1 and 3 (A) and (B), a taper portion 4a is formed on the outer peripheral portion 4 so that when the guide ring member 7 is press-fitted, its inner diameter portion 7a is crimped. It was done. The taper portion 4a sets the taper angle α to, for example, about 1 ° to 2 °.

In this case, the cross-sectional shape of the inner diameter portion 7a of the guide ring member 7 can be various shapes as shown in FIGS. 2 (A) to (F), as shown in FIGS. 1 and 2 (A). The tapered portion 9a can be formed on the inner diameter portion 7a, or the thin portion 9 can be formed by forming the arc-shaped portion 9b as shown in FIG. 2 (B). Further, as shown in FIGS. 2C to 2F, the thin portion 9 can be formed on the inner diameter portion 7a itself.

When the tapered portion 4a is formed on the outer peripheral portion 4 as described above, a clearance L is generated between the top plate 5 and the magnet 6 in the normal assembling process as shown in FIG. 3 (A). When the magnet 6 is magnetized, the top plate 5 is attracted by its magnetic attraction, and securely attracted and fixed as shown in FIG. 3 (B). At this time, the inner diameter portion 7a of the guide ring member 7 is forcibly deformed, and the inner diameter portion 7a of the guide ring member 7 is pressed against the outer peripheral portion 4 of the yoke pole portion 3 under a strong pressure due to the elastic force accompanying the forced deformation. To do.

FIGS. 4 (A) and 4 (B) show an example in which the engagement step portion 4b is formed on the outer peripheral portion 4, but the engagement step portion 4b is preliminarily located at a position higher by a height corresponding to the clearance L. Is formed, and the inner diameter portion 7a of the guide ring member 7 is formed in a flat plate shape,
The inner diameter portion 7a is engaged with the engagement step portion 4b in a strong pressure state by the elastic force accompanying the forced deformation of the guide ring member 7 when the magnet 6 is magnetized.

In the above configuration, the top plate 5 is assembled by fitting the inner diameter portion 7a of the guide ring member 7 to the outer peripheral portion 4 of the yoke pole portion 3 while holding the vibration system 1 and assembling.
Can be used as one electrode of the signal input line to the voice coil 14 and the yoke 2 can be used as the other electrode.
Therefore, if the connecting terminals are provided on the yoke 2 and the top plate 5, the lead wires, the tinsel wires, etc. can be easily wired without being complicatedly routed in the magnetic circuit.

(Effect of the Invention) According to the structure of the speaker according to 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, the yoke serves as the other electrode, and the guide ring member serves as a conductive path for the other electrode. The inner peripheral portion of the guide ring member is tightly fitted to the outer peripheral portion of the yoke pole portion due to the elastic force caused by the forced deformation, so that the inner peripheral portion and the outer peripheral portion of the yoke pole portion have poor contact. Moreover, since the suspension is securely clamped by the guide ring member, the lead wire of the voice coil is pressed against the top plate and the guide ring member, and the conduction failure of the voice signal path is eliminated, and the quality of the voice coil is improved. It is possible to improve.

Therefore, it is possible to absorb the tolerances of the parts, and the delicacy at the time of assembly is not required so much, so that the production efficiency can be improved.

[Brief description of drawings]

1 to 4 show an embodiment of the structure of the speaker according to the present invention, FIG. 1 is a cross-sectional view showing the main part of the speaker structure, and FIGS. 2 (A) to (F) are guide ring members. A cross-sectional view of the main part showing various cross-sectional shapes of the inner diameter part, FIG.
FIG. 4B is a sectional view of a main part showing a fitting form of the guide ring member, and FIG. 4 is a sectional view of a main part showing another fitting form of the same. FIGS. 5 to 7 show an example of the speaker that we have previously proposed, FIG. 5 is a perspective view showing the main part of the vibration system, and FIG. 6 is a sectional view of the main part showing the disassembled state. The figure is an enlarged cross-sectional view of a main part. 1: Whole vibration system, 2: Yoke, 3: Yoke pole part 4: Outer peripheral part, 4a: Taper part, 4b: Engaging step part 5: Top plate, 6: Magnet 7: Guide ring member, 7a: Inner diameter part, 8: Mating structure 9: Thin part, 9a: Tapered part, 9b: Arc part 11: Vibration plate part, 12: Coil bobbin part 13: Suspension, 14: Voice coil 16: Magnetic gap

Claims (3)

[Scope of utility model registration request] 1. A suspension for supporting a diaphragm and a voice coil bobbin, wherein the outer peripheral portion of a suspension is magnetic by sandwiching the outer peripheral portion of a guide ring member fitted to a yoke pole portion and the lower surface side of a top plate. In a speaker arranged inside the circuit, in which 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 serves as a conductive path of the other electrode, The outer diameter of the contact portion of the yoke pole portion with the guide ring member is made different from the inner diameter of the guide ring member so that the fitting shape of the guide ring member and the yoke pole portion is elastic force due to the forced deformation of the guide ring member. The structure of the speaker is characterized in that the speaker has a fitting structure for fitting in a strong pressure state. 2. The utility model registration claim 1 characterized in that the fitting structure is one in which the inner diameter portion of the guide ring member is press-fitted into a taper portion formed on the outer peripheral portion of the yoke pole portion. The structure of the described speaker. 3. A fitting structure in which an engaging step portion is formed on an outer peripheral portion of a yoke pole portion, and the engaging step portion is brought into pressure contact with the elastic force associated with the forced deformation of the guide ring member. The speaker structure according to claim 1, characterized in that there is a utility model registration.