JPH0593198U - Voice coil for diaphragm type speaker - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a voice coil for a diaphragm type speaker, which is suitable for a thin type speaker as a voice coil for a diaphragm type speaker used in a speaker and which is excellent in performance and strength. To aim. A bobbin 1 is formed by integrally forming a diaphragm 2 and a bobbin base 3, and the bobbin base 3 is expanded in the radial direction and divided into a plurality of small pieces 3a ... 3a at equal intervals in the circumferential direction. By winding the conductor wire 4 around the outer peripheral surface of the divided bobbin base 3, a voice coil 5 for a diaphragm type speaker is formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a voice coil for a diaphragm-type speaker, which comprises a diaphragm and a cylindrical bobbin base whose outer peripheral surface is wound with a conductive wire.

[0002]

[Prior Art]

 Conventionally, various types of voice coils have been known as a voice coil for a diaphragm type speaker used for a speaker. As an example, in a voice coil 10 shown in FIG. 3, a diaphragm 11 and a conductor wire on an outer peripheral surface are used. The bobbin base 13 on which 12 is wound is fixed by an adhesive 14.

In the voice coil 20 shown in FIG. 4, an upper end portion of a coil-shaped conductive wire 22 is fixed to a diaphragm 21 with an adhesive 24. On the other hand, as shown in FIG. 5, in order to simplify the work of positioning and adhering the upper end portion of the coil-shaped conductive wire 32 to the diaphragm 31, the coil-shaped conductive wire formed on the diaphragm 31 is simplified. There is also known a voice coil 30 for a diaphragm-type speaker of a type in which an annular protrusion 31a matching the inner diameter of 32 is formed.

Further, in the voice coil 40 shown in FIG. 6, the diaphragm 41 and the bobbin base 43 are integrally formed by drawing, and the conducting wire 42 is wound around the outer peripheral surface of the bobbin base 43.

[0005]

[Problems to be solved by the device]

 By the way, in the case of the diaphragm-type speaker voice coil 10 shown in FIG. 3, it is necessary to set the height of the bobbin base 13 low when the entire structure is made thin, which makes the manufacturing process extremely difficult. Further, even in the step of fixing the diaphragm 11 and the bobbin base body 13, since vibration is caused in the vertical direction within a very narrow gap between the magnet and the yoke, the difficulty of positioning work at the time of fixing is high and the cost is high. Further, since the diaphragm 11 and the bobbin base 13 are fixed to each other by the adhesive agent 14, there is a possibility that vibration loss may occur due to the adhesive agent 14 and the performance of the speaker may be slightly deteriorated.

Further, in the voice coil 20 shown in FIG. 4, the bobbin base as a core member does not exist in the conductor 22 formed in advance in a coil shape, and therefore, when the conductor 22 and the diaphragm 21 are fixed to each other. The positioning work was difficult and the cost was high. Moreover, since the bobbin base does not exist as described above, the strength and heat resistance of the coil-shaped conductive wire 22 are inferior to those of the type having the bobbin base.

The voice coil 30 shown in FIG. 5 also has the same problem as the voice coil 20.

On the other hand, in the voice coil 40 shown in FIG. 6, since the diaphragm 41 and the bobbin base body 43 are integrated, an adhesive agent between them is not required, and the vibration transmission loss is small and the speaker performance is improved. It has an excellent point that the lowering is prevented and the strength and heat resistance of the winding portion of the conductive wire 42 are improved by the existence of the bobbin base 43.

However, since the bobbin base 43 and the diaphragm 41 are integrally drawn, the thickness of the portion is inevitably thin, and the thickness of the portion is also uneven. This causes variations in sound quality and causes variations in speaker performance. Further, when winding the conductor wire 42, the bobbin base body 43 is usually inserted with a winding jig (not shown) having an outer diameter matching the inner diameter of the bobbin base body 43. The conducting wire 42 is wound around the outer peripheral surface of the bobbin 43. However, due to the uneven thickness of the bobbin base 43 due to drawing, the inner diameter of the bobbin base 43 and the outer diameter of the winding jig do not match, Therefore, a gap or a wrinkle is generated between the conductor wire 42 and the bobbin base 43, which deteriorates the quality. In addition, since the bobbin base body 43 has to be provided with a gentle curved portion from the diaphragm 41 side to the winding portion of the conducting wire 42 for drawing, the entire voice coil 40 has to be high, and a thin speaker is required. It was not suitable for a voice coil.

Therefore, the present invention solves various problems of the conventional voice coil for diaphragm type speaker, is suitable for use in a thin speaker, and has high performance and strength. The purpose is to provide a coil.

[0011]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention is configured as follows.

First, a device according to claim 1 of the present application (hereinafter, referred to as a first device) is a diaphragm-type voice coil for a speaker, comprising a diaphragm and a cylindrical bobbin base having a conductor wound around an outer peripheral surface thereof. The diaphragm and the bobbin base are integrally formed of a resin material, and the bobbin base is expanded in the radial direction so as to be divided at equal intervals in the circumferential direction, and a conductive wire is wound around the outer peripheral surface of the divided bobbin base. It is characterized by

The invention according to claim 2 of the present application (hereinafter referred to as the second invention) is characterized in that a lead wire formed in advance in a coil shape is inserted and fixed to the outer peripheral surface of the bobbin base in the first invention. And

[0014]

[Action]

 According to the first aspect of the invention, since the diaphragm and the bobbin base are integrally formed, it is not necessary to position and bond the diaphragm and the bobbin base, which makes it possible to assemble the voice coil for the diaphragm speaker. Is simplified and the workability is remarkably improved, and since the diaphragm and the bobbin base are integrated, there is no adhesive between them and the loss of vibration transmission due to the adhesive is prevented. As a result, the transmission loss of sound is extremely small and the speaker performance is further improved.

Further, since the bobbin base is expanded in the radial direction and divided at equal intervals in the circumferential direction, it is possible to easily insert the winding jig into the bobbin base in the conducting wire winding step. As a result, the workability of the winding work is improved, and the conductor wire wound around the outer peripheral surface of the bobbin base is securely fixed, so that the conductor wire is prevented from being displaced and the voice coil of this type is prevented. The quality will be improved.

Further, according to the second aspect of the invention, the winding process is omitted by inserting and fixing the lead wire, which is previously formed into a coil shape, on the outer peripheral surface of the bobbin base. The work process for assembling the voice coil for the diaphragm type speaker will be simplified and the workability will be significantly improved.

[0017]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a bobbin that constitutes a voice coil for a diaphragm-type speaker according to the present invention. In this bobbin 1, a diaphragm 2 and a bobbin base 3 are integrally formed of a resin material or the like. The bobbin base 3 is expanded in the radial direction and divided into a plurality of small pieces 3a ... 3a at equal intervals in the circumferential direction. Then, as shown in FIG. 2, by winding the conductive wire 4 around the outer peripheral surface of the bobbin base 3, a voice coil 5 for a diaphragm type speaker is formed.

At the time of winding the conducting wire 4, a winding jig having an outer diameter that matches the inner diameter of the bobbin base 3 is provided in the bobbin base 3 divided into a plurality of small piece portions 3a. (Not shown) is inserted, and the conductor wire 4 is wound in this state.

According to the above configuration, since the diaphragm 2 and the bobbin base 3 are integrally formed, it is not necessary to position and bond the diaphragm 2 and the bobbin base 3 together. The work of assembling the voice coil 5 is simplified and the workability is remarkably improved, and since the diaphragm 2 and the bobbin base 3 are integrated, there is no adhesive between them and the sound of the sound is reduced. The transmission loss will be extremely small, and the performance of the speaker will be further improved.

Further, since the bobbin base 3 is expanded in the radial direction and divided into a plurality of small pieces 3a ... 3a at equal intervals in the circumferential direction, the bobbin base 3 is wound on the bobbin base 3 in the winding step of the conducting wire 4. Since the jig can be easily inserted, the workability of the winding work is improved, and the conductive wire 4 wound around the outer peripheral surface of the bobbin base 3 is reliably fixed. The displacement of the conducting wire 4 is prevented, and the quality of the voice coil 5 is improved.

The conductive wire 4 may be formed into a coil shape in advance, and the coiled conductive wire 4 may be inserted and fixed to the outer peripheral surface of the bobbin base 3. In this case, the conductive wire 4 may be formed. By omitting the winding step of 4, the assembling work step of the voice coil 5 for the diaphragm type speaker is simplified and the workability thereof is remarkably improved.

[0023]

[Effect of the device]

 As described above, according to the first aspect of the invention, the diaphragm and the bobbin base are integrally formed, and it is not necessary to position and bond the diaphragm and the bobbin base, and the assembly work of the voice coil for the diaphragm type speaker is performed. The process can be simplified and the workability can be remarkably improved, and the diaphragm and the bobbin base are integrated so that there is no adhesive between them, which minimizes the sound transmission loss. The performance of the speaker can be further improved.

Further, since the bobbin base is expanded in the radial direction and is divided at equal intervals in the circumferential direction, it becomes easy to insert the winding jig into the bobbin base in the wire winding step, which allows , The workability of the winding work is improved, and the conductor wire wound around the outer peripheral surface of the bobbin base is securely fixed, so that the displacement of the conductor wire is prevented and the quality of this kind of voice coil is improved. Can be made

Further, according to the second aspect of the present invention, the winding process is omitted by inserting and fixing the lead wire, which is previously formed into a coil shape, on the outer peripheral surface of the bobbin base. The work of assembling the voice coil for the diaphragm type speaker is simplified, and the workability can be further improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a bobbin forming a voice coil for a diaphragm-type speaker according to the present invention.

FIG. 2 is a perspective view of a voice coil for a diaphragm-type speaker according to the present invention.

FIG. 3 is a perspective view of a conventional voice coil for a diaphragm-type speaker in which a diaphragm and a bobbin base are bonded together.

FIG. 4 is a perspective view of a conventional voice coil for a diaphragm type speaker in which a conductive wire is directly bonded to a diaphragm.

FIG. 5 is a perspective view of a conventional voice coil for a diaphragm type speaker in which a conductive wire positioning portion is formed on a diaphragm.

FIG. 6 is a perspective view of a conventional voice coil for a diaphragm speaker in which a diaphragm and a bobbin base are integrally formed.

[Explanation of symbols]

 1 bobbin 2 diaphragm 3 bobbin base 4 conductor wire 5 voice coil for diaphragm type speaker

Claims (2)

[Scope of utility model registration request] 1. A voice coil for a diaphragm-type speaker comprising a diaphragm and a cylindrical bobbin base having a conductor wound around an outer peripheral surface, wherein the diaphragm and the bobbin base are integrally formed of a resin material. A voice coil for a diaphragm speaker, characterized in that the base body is expanded in the radial direction and is divided at equal intervals in the circumferential direction, and a conductor wire is wound around the outer peripheral surface of the divided bobbin base body. 2. A voice coil for a diaphragm-type speaker comprising a diaphragm and a cylindrical bobbin base whose outer peripheral surface is wound with a conductive wire, wherein the diaphragm and the bobbin base are integrally formed of a resin material. The base body is expanded in the radial direction and divided at equal intervals in the circumferential direction, and a conductor wire formed in advance in a coil shape is inserted and fixed to the outer peripheral surface of the divided bobbin base body. Voice coil for diaphragm type speaker.