JPH11146489A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a weight ring, which is used for a speaker, from being detached so as to contribute to the improvement of input resistance concerning the speaker to be used for various kinds of acoustic equipment. SOLUTION: Concerning this speaker, a notch 7b is provided on the upper side face of a coil bobbin 7a, further, a protruding part 8b is provided on the side face of a weight ring 8a, the protruding part 8b of the weight ring 8 is inserted into the notch 7b, which is provided on the coil bobbin 7a, and rotated in circumferential direction and through such a means for fixing the weight ring 8a, the weight ring 8a is prevented from being dropped down so that the input resistance of the speaker can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker with high input resistance used for various audio equipment.

[0002]

2. Description of the Related Art A conventional speaker will be described with reference to FIGS. FIG. 6 is a side sectional view of a conventional speaker.
FIG. 7 is an enlarged cross-sectional view of a connection portion between a weight ring and a coil bobbin, which are main parts. Referring to FIG. 1, reference numeral 1 denotes a magnetic circuit having a magnetic gap 1d, and a lower plate 1c.
The magnet 1b and the upper plate 1a are formed on the upper surface by adhesive bonding.

Reference numeral 2 denotes a frame connected to the magnetic circuit 1. An inner peripheral portion of the frame 4 is connected to a coil bobbin 7 in which a coil portion 6 serving as a voice coil is fitted in the magnetic gap 1d. Is joined to.

[0004] Reference numeral 3 denotes a damper whose inner periphery is bonded to the coil bobbin 7 and whose outer periphery is connected to the frame 2. 10 is placed on the coil bobbin 7 and the adhesive 9
Is a weight ring that is connected to the coil bobbin 7.

[0005] The weight ring 10 is used to increase the mass of the vibration system in order to lower the lowest resonance frequency.

[0006]

In the conventional loudspeaker constructed as described above, the bonding between the coil bobbin 7 and the weight ring 10 is performed by the adhesive 9 as shown in FIG. When applied, the coil section 6
Joule heat generated in the weight ring 10 is transmitted through the coil bobbin 7 to the adhesive 9, and the adhesive 9 is softened or deteriorated, and the vibration of the speaker may deteriorate the joining state of the weight ring 10. In particular, when aluminum was used as the material of the coil bobbin 7, this phenomenon was remarkable because the adhesiveness of aluminum was poor.

[0007]

In order to solve the above-mentioned problems, a speaker according to the present invention comprises a magnetic circuit having a magnetic gap, a frame coupled to the magnetic circuit, and a coil portion fitted in the magnetic gap. A damper having a coil bobbin connected to an inner peripheral portion and an outer peripheral portion connected to the frame, a cone having an outer peripheral portion connected to the frame and an inner peripheral portion connected to the coil bobbin, and an insertion portion provided on an upper side surface of the coil bobbin. And a weight ring mounted on the coil bobbin and inserted into the insertion portion of the coil bobbin and provided on a side surface with a protruding portion that is guided by the bent portion. The weight ring and the coil bobbin Not only the adhesive but also the weight ring projection and the coil bobbin bend make the weight ring In which exit can provide high-quality speakers which prevents the upward.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention provides a magnetic circuit having a magnetic gap, a frame coupled to the magnetic circuit, and a coil bobbin having a coil section fitted in the magnetic gap. It is composed of a damper coupled to the inner peripheral portion and an outer peripheral portion coupled to the frame, a cone having an outer peripheral portion coupled to the frame and an inner peripheral portion coupled to the coil bobbin, and an insertion portion and a bent portion provided on an upper side surface of the coil bobbin. A notch and a weight ring provided on the side surface of the coil bobbin and provided with a protruding portion which is inserted into the insertion portion of the coil bobbin and guided by the bending portion, is provided on a side surface, thereby preventing the weight ring from slipping upward. It is intended.

An embodiment of the speaker according to the present invention will be described below with reference to FIGS. In the description, the same parts as in the related art will be denoted by the same reference numerals, and description will be omitted.

FIG. 1 is a side sectional view of a speaker according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of a coupling portion between a coil bobbin and a weight ring, which are main parts, and FIG. FIG. 4 is a perspective view of the weight ring, and FIG. 5 is a perspective view of the coil bobbin.

Referring to FIG. 1, reference numeral 8a denotes a weight ring, and reference numeral 8b denotes a projection provided on a side surface of the weight ring 8a. Reference numeral 7a denotes a coil bobbin having an L-shaped notch 7b at an upper portion thereof, and the weight ring 8a
Is inserted into the insertion portion 7c of the notch 7b, and is rotated to the bent portion 7d, so that the weight ring 8
The weight ring 8a and the coil bobbin 7a are adhesively bonded to each other with an adhesive 9 while preventing the a from coming off.

As described above, the weight ring 8a is prevented from easily falling off due to the protrusion 8b of the weight ring 8a and the notch 7b of the coil bobbin 7a even if the adhesive strength is deteriorated due to the heat generated by the coil portion 6 because of the configuration. Is what is done.

[0013]

According to the loudspeaker of the present invention constructed as described above, even if the adhesive is slightly deteriorated, not only the adhesive is used to hold the connection between the weight ring and the coil bobbin but also the two are locked. Because it also holds
This improves the reliability of the connection between the coil bobbin and the weight ring, and contributes to high input resistance.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a speaker according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a coupling portion between the coil bobbin and the weight ring, which is the main part.

FIG. 3 is a perspective view of the same.

FIG. 4 is a perspective view of the weight ring.

FIG. 5 is a perspective view of the coil bobbin.

FIG. 6 is a side sectional view of a conventional speaker.

FIG. 7 is an enlarged cross-sectional view of a connection part between the weight ring and the coil bobbin, which is the main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic circuit 1d Magnetic gap 2 Frame 3 Damper 4 Cone 6 Coil part 7a Coil bobbin 7b Notch 7c Insertion part 7d Bending part 8a Weight ring 8b Weight ring protrusion 9 Adhesive

Claims (1)

[Claims] 1. A magnetic circuit having a magnetic gap, a frame coupled to the magnetic circuit, and a coil bobbin having a coil portion fitted in the magnetic gap are coupled to an inner peripheral portion and an outer peripheral portion is coupled to the frame. A damper, a cone having an outer peripheral portion connected to a frame and an inner peripheral portion connected to the coil bobbin, a notch formed of an insertion portion and a bent portion provided on an upper side surface of the coil bobbin, and a notch formed of the coil bobbin mounted on the coil bobbin. And a weight ring provided on a side surface with a protrusion inserted into the insertion portion and guided by the bent portion.