JP2005252925A - Speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker without an overflowed adhesive with excellent reliability in the adhesive strength by solving a problem of abnormal sound such as chatter and flutter caused by the overflowed adhesive in the case of applying the adhesive to a suspension holder. <P>SOLUTION: The speaker comprises: a frame 5 coupled to a magnetic circuit including a magnetic gap 4; a diaphragm 7 to the center of which a voice coil 6 fitted to the magnetic gap 4 is coupled and the circumferential edge of which is coupled to the frame 5; the suspension holder 9 whose inner circumferential part is coupled to the rear side of the diaphragm 7 and whose circumferential edge is coupled to the frame 5; and an adhesive pool 9b arranged from an adhered part 9a provided to a part of the suspension holder 9 coupled to the diaphragm 7 toward the magnetic circuit. Thus, even when the adhesive overflows in the case of applying the adhesive to the adhered part 9a, the adhesive 9b remains in the adhesive pool 9b and is not dropped to the frame 5 in a thready state, and then the speaker with excellent reliability can stably be provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a speaker used for various audio equipment.

  FIG. 5 is a cross-sectional view showing the structure of this type of conventional speaker. In FIG. 5, 21 is a magnet, 22 is a plate, and 23 is a yoke. These are combined and joined as shown in FIG. A magnetic circuit is formed in which an annular magnetic gap 24 is formed. Reference numeral 25 denotes a frame coupled around the magnetic circuit, and 26 denotes a voice coil movably fitted in a magnetic gap 24 provided in the magnetic circuit. Reference numeral 27 denotes a diaphragm. The diaphragm 27 has an inner periphery bonded to the voice coil 26 and a peripheral edge bonded to the periphery of the diaphragm 27 via a roll-shaped first edge 28. It is glued to. Reference numeral 29 denotes a suspension holder. The suspension holder 29 has an inner periphery bonded to the inner periphery and an outer periphery of the diaphragm 27 on the magnetic circuit side, and a periphery bonded to the periphery of the suspension holder 29. It is bonded to the frame 25 via a roll-shaped second edge 30. A dust cap 31 is adhered to the surface side of the diaphragm 27 so as to close the voice coil 26.

  In the conventional loudspeaker configured as described above, the first and second edges 28 and 30 have substantially symmetrical similar shapes, so that the first and second edges 28 and 30 cancel their own asymmetry. Therefore, the nonlinearity and asymmetry of the suspension can be fundamentally solved, thereby reducing the harmonic distortion of the speaker and improving the power linearity, thereby improving the performance of the speaker.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2004-7335 A

  However, in the above-described conventional speaker, in the manufacturing process, the second edge 30 bonded to the periphery of the suspension holder 29 is attached to the frame 25 coupled with the magnetic circuit with an adhesive and dried and cured, and then the suspension holder 29 is attached. In order to bond the inner peripheral portion of the vibration plate 27 to the back surface of the vibration plate 27, an adhesive is applied to the bonding portion 29a, and the vibration plate 27 is placed thereon and bonded. When the adhesive is applied to the adhesive portion 29a on the inner peripheral portion of the suspension holder 29, the adhesive overflows from the adhesive portion 29a, and the overflowed adhesive falls to the frame 25 in a state where the yarn is pulled, and this yarn pulling There was a problem in performance such that the adhesive in the state appeared as abnormal noise such as chatter during operation of the speaker.

  In order to solve this problem, it is possible to prevent the adhesive from overflowing by reducing the application amount of the adhesive. However, if the application amount of the adhesive is reduced, the suspension holder 29 and the diaphragm 27 are reduced. The bonding strength with the vibration plate 27 may decrease, or an unbonded part may occur and abnormal noise such as chatter may occur, so that the bonding strength with the diaphragm 27 is maintained and the adhesive is not overflowed. There was a problem that it was extremely difficult to perform.

  An object of the present invention is to solve such a conventional problem, and to provide a speaker having no adhesive overflow and having excellent adhesive strength reliability.

  In order to solve the above-mentioned problems, the present invention combines a magnetic circuit having an annular magnetic gap, a frame coupled with the magnetic circuit, and a voice coil movably fitted in the magnetic gap, with a peripheral edge. Is coupled to the frame through the first edge, and the inner periphery is coupled to the inner periphery and the outer periphery of the diaphragm on the magnetic circuit side, and the periphery is the second edge. In the speaker, the first edge and the second edge having a substantially symmetrical shape are coupled to the back surface of the diaphragm on the inner periphery of the suspension holder. An adhesive portion bonded to the inner part along the diaphragm toward the inner periphery, and an adhesive reservoir formed by forming a step portion toward the magnetic circuit side away from the bonded portion in an annular shape It is obtained by the configuration that digit.

  As described above, the speaker according to the present invention has a configuration in which the adhesive reservoir is provided in the portion that is coupled to the back surface of the diaphragm on the inner periphery of the suspension holder, so that the inner periphery of the suspension holder is connected to the diaphragm. Even if the adhesive overflows due to variations in the amount of adhesive applied when the adhesive is applied to the adhesive part to be bonded to the back side, the overflowed adhesive will only be collected in the adhesive reservoir and threaded. Thus, the speaker does not fall into the frame, and it is possible to stably provide a speaker having excellent adhesive strength reliability.

(Embodiment 1)
Hereinafter, the first and third aspects of the present invention will be described with reference to the first embodiment.

  FIG. 1 is a cross-sectional view showing a configuration of a speaker according to Embodiment 1 of the present invention, FIG. 2 is an enlarged cross-sectional view of the main part, and in FIGS. 1 and 2, 1 is a magnet, 2 is a plate, Is a yoke, and a magnetic circuit in which an annular magnetic gap 4 is formed by combining and joining them as shown in FIG. Reference numeral 5 denotes a frame coupled around the magnetic circuit, 6 denotes a voice coil movably fitted in a magnetic gap 4 provided in the magnetic circuit, and 7 denotes a diaphragm. Is bonded to the voice coil 6, and the periphery is bonded to the frame 5 via a roll-shaped first edge 8 bonded to the periphery of the diaphragm 7.

  Reference numeral 9 denotes a suspension holder. The suspension holder 9 is coupled to the inner periphery and the outer periphery of the diaphragm 7 on the magnetic circuit side, and the periphery is bonded to the periphery of the suspension holder 9. It is bonded to the frame 5 through a rolled second edge 10. Reference numeral 9a denotes an adhesive portion provided on the inner peripheral portion of the suspension holder 9. The adhesive portion 9a is formed along the diaphragm 7 toward the inner periphery of the diaphragm 7, and is an extension of the adhesive portion 9a. Further, an adhesive reservoir portion 9b having a stepped portion toward the magnetic circuit side is provided in an annular shape so as to be separated from the bonding portion 9a. A dust cap 11 is adhered to the surface side of the diaphragm 7 so as to close the voice coil 6.

  The loudspeaker according to the present embodiment configured as described above has a configuration in which the adhesive reservoir 9b is provided in a portion where the inner periphery of the suspension holder 9 is coupled to the back surface of the diaphragm 7, whereby the suspension holder 9 When the adhesive is applied to the adhesive portion 9a in order to bond the inner peripheral portion of the adhesive 9 to the back surface of the diaphragm 7, even if the adhesive overflows due to variations in the amount of adhesive applied, the overflowing adhesive is It does not fall into the frame 5 in a stringed state simply by being collected in the adhesive reservoir 9b, and there is an extraordinary effect that it is possible to stably provide a speaker having excellent adhesive strength reliability. Is.

(Embodiment 2)
The second aspect of the present invention will be described below with reference to the second embodiment.

  In this embodiment, the shape of the adhesive reservoir provided in the suspension holder of the speaker according to the first embodiment is different, and the configuration other than this is the same as in the first embodiment. Detailed description thereof will be omitted, and only different parts will be described below with reference to the drawings.

  FIG. 3 is a cross-sectional view of a main part showing the configuration of the speaker according to the second embodiment of the present invention. In FIG. 3, 9c is an adhesive reservoir, and this adhesive reservoir 9c is bonded according to the first embodiment. Similar to the agent reservoir 9b, a concave shape is formed on the extension of the adhesive portion 9a formed along the vibration plate 7 toward the inner periphery of the vibration plate 7 toward the magnetic circuit side away from the adhesion portion 9a. Since the adhesive reservoir 9c is formed in a concave shape in this way, even when the adhesive overflows, a large amount of adhesive can be confined in the adhesive reservoir 9c. Thus, it is possible to more effectively obtain the operational effects obtained by Form 1, and to provide a margin for managing the amount of adhesive applied.

  The first and second embodiments cancel the asymmetry of the first and second edges 8 and 10 themselves and fundamentally solve the nonlinearity and asymmetry of the suspension to reduce the harmonic distortion of the speaker. In addition to the effect that the power linearity can be improved and the performance of the speaker can be improved, the first edge 8 and the second edge 10 having a substantially symmetrical shape are formed in a semicircular roll shape, respectively. The first edge 8 is configured such that the roll is directed downward, and the second edge 10 is configured such that the roll is directed upward, so that the roll portions face each other, so that the overall height (speaker height) is reduced. Therefore, it is optimal for applications that require a reduction in thickness, such as in-vehicle door mounts.

(Embodiment 3)
The third embodiment of the present invention will be described below in particular.

  In the present embodiment, the first edge and the second edge of the speaker according to the first embodiment have different roll directions, and the other configurations are the same as those in the first embodiment, so the same portions are used. Are given the same reference numerals and detailed description thereof is omitted, and only different parts will be described below with reference to the drawings.

  4 is a cross-sectional view showing the configuration of the speaker according to Embodiment 3 of the present invention. In FIG. 4, 8 is a roll-shaped first edge bonded to the periphery of the diaphragm 7, and 10 is the suspension holder 9. It is a roll-shaped second edge bonded to the periphery, and the first edge 8 and the second edge 10 are each formed in a semicircular roll shape and formed in a substantially symmetrical similar shape. In the present embodiment, the first edge 8 is configured such that the roll is directed upward, and the second edge 10 is configured such that the roll is directed downward. Are separated from each other, the trajectory accompanying the amplitude of the edge becomes equivalently large and the rigidity is increased, whereby the rolling phenomenon of the voice coil 6 is further suppressed.

  The speaker according to the present invention has the effects of reducing harmonic distortion, improving power linearity, and being excellent in reliability of adhesive strength, and is particularly useful for large input applications such as in-vehicle use.

Sectional drawing which showed the structure of the speaker by Embodiment 1 of this invention Sectional view enlarging the main part Sectional drawing which shows the structure of the speaker by Embodiment 2 of this invention Sectional drawing which showed the structure of the speaker by Embodiment 3 of this invention. Sectional view showing the structure of a conventional speaker

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnet 2 Plate 3 Yoke 4 Magnetic gap 5 Frame 6 Voice coil 7 Diaphragm 8 1st edge 9 Suspension holder 9a Adhesive part 9b, 9c Adhesive reservoir part 10 2nd edge 11 Dust cap

Claims (4)

A magnetic circuit having an annular magnetic gap, a frame coupled with the magnetic circuit, and a voice coil movably fitted in the magnetic gap are coupled to each other at the center, and a peripheral edge is connected to the frame via a first edge. A suspension holder in which an inner peripheral portion is coupled to an inner periphery and a middle portion of a rear surface of the diaphragm on the magnetic circuit side, and a peripheral edge is coupled to the frame via a second edge. In the speaker in which the first edge and the second edge have a substantially symmetrical shape, the inner periphery of the suspension holder is connected to the back surface of the diaphragm toward the inner periphery along the diaphragm. The speaker is provided with an adhesive portion formed in a ring shape and a bonding portion formed by forming a step portion toward the magnetic circuit side so as to be separated from the bonding portion. The speaker according to claim 1, wherein a concave portion is formed toward the magnetic circuit side so that the adhesive reservoir portion is separated from the adhesive portion. The first edge and the second edge, which have a substantially symmetrical shape, are each formed in a semicircular roll shape, the first edge is configured so that the roll faces downward, and the second edge is configured so that the roll faces upward The speaker according to claim 1, wherein The first edge and the second edge having a substantially symmetrical shape are each formed in a semicircular roll shape, and the first edge is configured so that the roll is directed upward, and the second edge is configured so that the roll is directed downward. The speaker according to claim 1, wherein

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