JP3913437B2 - Speaker device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a speaker device having an elliptical or elliptical sound emission port.
[0002]
[Prior art]
In video equipment such as a television receiver and information processing equipment such as a computer, a sound output speaker is arranged on the side of the display for video output to enhance the sense of unity of video and audio. In this case, in order to reduce the horizontal width of the entire apparatus as much as possible, a vertically long speaker having a small horizontal width is employed.
[0003]
FIG. 5 shows a cross-sectional structure in the width direction of such a vertical speaker.
The loudspeaker has an ellipsoidal sound emission port (10 '), and a megaphone-shaped cone paper (2) is disposed inside the megaphone-shaped frame (9), and the base end of the frame (9) A reciprocating drive mechanism comprising a yoke (4), a magnet (5), a pole piece (6), and a voice coil (7) is attached to the part, and the cone paper (2) is attached to the outer peripheral surface of the voice coil (7). The base end is connected. Further, the opening end of the cone paper (2) is attached to the cone paper attaching step (92) (92) formed at the opening end of the frame (9). Further, a corrugated damper (30) having a plurality of corrugations (folds) extending in an elliptical shape is interposed between the voice coil (7) and the frame (9).
[0004]
As shown in FIGS. 6 (a) and 6 (b), at the base end portion of the frame (9), a damper attaching step (91) for attaching the outer periphery of the damper (30) is formed in an elliptical ring shape. In addition, a cone paper attaching step (92) for attaching the opening end of the cone paper (2) is formed in an oval ring shape at the opening end of the frame (9).
[0005]
In the speaker shown in FIG. 5, the cone paper (2) is reciprocated by supplying a current corresponding to the input signal to the voice coil (7), and the vibration of the cone paper (2) is caused by the damper (30). The damper effect is applied, and sound corresponding to the input signal is emitted from the sound emission opening (10 ′).
[0006]
[Problems to be solved by the invention]
By the way, in the above-described speaker, in order to obtain high sound quality, it is necessary to employ a damper (30) that exhibits a large amplitude and sufficient compliance. For this purpose, it is effective to form the damper (30) with an outer diameter as large as possible to form as many corrugations as possible.
[0007]
However, in the longitudinal speaker shown in FIGS. 5 and 6, since the lateral width W is limited, the lateral width B ′ (short axis diameter of the outer peripheral edge) of the damper (30) is also limited. Can not form many corrugations.
For this reason, there is a limit to the improvement of sound quality in the conventional vertically long speaker.
[0008]
Therefore, as shown in FIGS. 7 (a) and 7 (b), the side walls of the frame (9) are pressed from the outside to the inside using a punch (80) to cut and stick the cone paper. A structure in which the ridges (93) and (93) project inward is conceivable. According to the frame structure, since the cone paper sticking cut and raised portion (93) protrudes to the inside of the frame (9), it is possible to enlarge the interval between both side walls of the frame (9). The elliptical shape of the damper pasting step (91) can have a large minor axis diameter. As a result, the damper (30) can be formed in an elliptical shape with a short minor axis diameter B ', thereby improving the sound quality.
[0009]
However, in the frame structure shown in FIGS. 7 (a) and 7 (b), in the step of forming the cut-and-raised portion (93) in the frame (9), it is formed only by punching with the punch (80). Since the flatness of the cut-and-raised part (93) is low and the cone paper cannot be stuck and pasted, the cut-and-raised part (93) is further pressed (determined pushing process) and the plane Post-processing is necessary to increase the degree. As a result, there is a problem that the man-hour increases and the cost increases.
In addition, since large through holes (94) and (94) are opened on both sides of the frame (9), the strength of the frame (9) is reduced, for example, transportation from the frame manufacturing process to the speaker assembly process. There is a possibility that the frame (9) is deformed by applying some external force.
[0010]
An object of the present invention is to improve sound quality in a speaker device having an elliptical or elliptical sound emission port, and can reduce the number of steps in the frame manufacturing process. It is to provide a novel structure that can maintain high.
[0011]
[Means for solving the problems]
In the speaker device according to the present invention, a megaphone-shaped cone paper (2) is provided inside the megaphone-shaped frame (1), and the base end of the cone paper (2) is the base end of the frame (1). The damper (3) is interposed between the frame (1) and the output part of the reciprocating drive mechanism.
The frame (1) is formed with cone paper affixed bent portions (12) and (12) formed by bending the ends of the frame (1) inward on both sides in the short axis direction of the sound outlet (10). A plurality of through holes (13) and (13) are opened along each cone paper affixed bent part (12), and the open end of the cone paper (2) is formed in both the cone paper affixed bent parts (12) and (12). It is pasted.
[0012]
In the above-described speaker device of the present invention, since the cone paper pasting bent portion (12) protrudes inside the frame (1), the interval between both side walls of the frame (1) can be increased. The shape of the damper attaching step (11) can be made large in shaft diameter. As a result, a damper having a large shaft diameter can be used, and in particular, in the case of an elliptical damper (3), it is possible to increase the short shaft diameter B, thereby improving the sound quality.
[0013]
Also, in the manufacturing process of the frame (1), the corn paper affixed bent portion (12) and the through holes (13) and (13) are simultaneously formed by pressing using a pair of punches (8) and dies (83). Can be formed. Here, the corn paper affixed bent part (12) can be formed by bending the end of the frame (1), and punching is not necessary. For example, the punch (8) has a corn paper affixed bent part. A first punch portion for bending (12) and a second punch portion for punching and forming the through holes (13) and (13) can be provided side by side. And it is possible to increase the flatness by pressing both sides of the folded portion (12) of the corn paper pasted by the first punched portion and the second punched portion of the punch (8) and pressing it simultaneously with the bending. It is.
[0014]
Further, the frame (1) has a plurality of small through holes (13) and (13) formed in place of the conventional large through hole (94), and is formed between the through holes (13) and (13). Since the bridge portion to be used exhibits a function as a support, the structural strength of the frame (1) is higher than that of the conventional frame (9).
The through holes (13) and (13) of the frame (1) play a role of facilitating the flow of air accompanying the vibration of the cone paper (2) and allowing free vibration of the cone paper (2).
[0015]
Specifically, the damper (3) has an oval or elliptical outer peripheral edge and a circular inner peripheral edge, and the short axis direction of the outer peripheral edge coincides with the short axis direction of the sound emission port (10). The outer periphery of the damper (3) is attached to the damper attaching step (11) formed on the frame (1), and the inner periphery of the damper (3) is connected to the reciprocating drive mechanism. It is connected to the output section.
The cone paper (2) has an oval or elliptical opening end, and is arranged such that the short axis direction of the opening end coincides with the short axis direction of the sound emission port (10). The opening end is affixed to the cone paper affixing bent part (12) formed at the opening end of the frame (1).
[0016]
【The invention's effect】
According to the speaker device of the present invention, the sound quality can be improved, the number of steps in the frame manufacturing process can be reduced, and the strength of the frame can be kept high.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
FIG. 1 shows a cross-sectional structure in the lateral width direction of a speaker according to the present invention.
The speaker has an ellipsoidal sound emission port (10), and a megaphone-shaped cone paper (2) is arranged inside the megaphone-shaped frame (1), and the base end of the frame (1) A reciprocating drive mechanism comprising a yoke (4), a magnet (5), a pole piece (6) and a voice coil (7) is attached to the outer periphery of the voice coil (7). The ends are connected. The opening of the voice coil (7) is covered with a dust proof (71).
A ring-shaped gasket (21) is attached to the opening edge of the frame (1). The opening end of the cone paper (2) is attached to the opening end of the frame (1).
Further, a corrugated damper (3) having a plurality of corrugations (folds) extending in an elliptical shape is interposed between the voice coil (7) and the frame (1).
[0018]
As shown in FIGS. 2A and 2B, a damper attaching step (11) for attaching the outer periphery of the damper (3) is formed in an elliptical ring shape at the base end of the frame (1). At the same time, a corn paper attaching bent portion (12) (12) for attaching the opening end of the cone paper (2) is formed at the opening end of the frame (1).
Further, as shown in FIG. 3 (b), the frame (1) has two through holes (13) and (13) along each cone paper sticking bent part (12).
[0019]
3 (a) (b) and 4 (a)-(d) show the press working for forming the cone paper pasted bent portion (12) and the through holes (13), (13) in the frame (1). It represents a process. Prior to the press working, as shown in FIG. 3 (a), projecting pieces (14) (14) are formed on both side walls in the lateral width direction of the frame (1).
In addition, the punch (8) used for press working has two punching portions (81) (81) for punching and forming two through holes (13) and (13), and a projecting piece (14) at a right angle. A folding punch portion (82) for bending is projected.
[0020]
On the other hand, as shown in FIG. 4 (a), the die (83) used for pressing is formed with a recess (84) into which each punching punch portion (81) of the punch (8) is to be fitted.
As shown in FIG. 4 (a), the punch (8) is advanced toward the die (83) with the punch (8) and the die (83) arranged on both sides of the side wall of the frame (1) (FIG. 3 (a)). )reference). As a result, as shown in FIGS. 4B and 4C, the projecting piece 14 of the frame 1 is pressed by the folding punch portion 82 of the punch 8 and gradually bent. Further, the side wall of the frame (1) is punched by the punching punch portion (81).
Further, when the punch (8) further moves forward, the projecting piece (14) of the frame (1) is bent at a right angle as shown in FIG. 4 (d), and a cone paper pasting bent portion (12) is formed. It will be. In this process, the corn paper affixed bent part (12) of the frame (1) is pinched by the punched punch part (81) and the bent punch part (82) of the punch (8), and the bent punch part (82) Finished with high flatness by receiving press processing (fixed press processing).
[0021]
As a result, as shown in FIG. 3 (b), the cone paper sticking bent portions (12) and (12) having high flatness are formed on both side walls of the frame (1), and the cone paper sticking bent portions (12) Two through-holes (13) and (13) will be opened along.
Then, as shown in FIG. 1, the yoke (4), magnet (5), pole piece (6), voice coil (7), and dust proof (71) are assembled to the frame (1). The outer periphery of the damper (3) is attached to the damper attaching step (11) of 1), and the inner periphery of the damper (3) is connected to the outer peripheral surface of the voice coil (7).
Thereafter, the base end portion of the cone paper (2) is connected to the outer peripheral surface of the voice coil (7), and the open end portion of the cone paper (2) is attached to the cone paper sticking bent portion (12) of the frame (1). Furthermore, a gasket (21) is attached to the corn paper sticking bending part (12).
Thus, the assembly of the speaker according to the present invention is completed.
[0022]
In the above-described speaker of the present invention, as shown in FIGS. 1 and 2, the cone paper-attached bent portions (12) and (12) of the frame (1) protrude inside the frame (1). The distance between the side walls can be maximized within the range of the full width W of the speaker, whereby the elliptical shape of the damper attaching step (11) can have a large minor axis diameter. As a result, the damper (3) can be formed in an elliptical shape with a short minor axis diameter B, and the sound quality of the speaker can be greatly improved.
In the above embodiment, the shape of the damper (3) is an elliptical shape. However, even in the case of a circular shape, it is possible to increase the shaft diameter of the damper, and the same effect can be obtained. Further, as the damper (3), in addition to the corrugated plate, a cloud-shaped one can be applied.
[0023]
Also, in the manufacturing process of the frame (1), through holes (13) and (13) are opened by pressing using a pair of punches (8) and dies (83), and at the same time, the folding portion ( 12) can be formed with high flatness. Accordingly, it is not necessary to perform post-processing as in the prior art on the cone paper pasted bent portion (12), thereby reducing the number of man-hours.
[0024]
In addition, the frame (1) is provided with two small through holes (13) and (13) instead of the conventional large through hole (94), and between the through holes (13) and (13). Since the formed bridge portion functions as a support column, the structural strength of the frame (1) is higher than that of the conventional frame. Therefore, even when an external force is applied to the frame (1) during transportation from the frame manufacturing process to the speaker assembly process, there is no possibility that the frame (1) is easily deformed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view in the lateral width direction of a speaker according to the present invention.
FIG. 2 is a diagram showing a front shape (a) and a cross-sectional shape (b) of a frame used in the speaker.
FIG. 3 is a perspective view showing a frame shape before (a) and after (b) pressing the frame.
FIGS. 4A and 4B are a series of cross-sectional views illustrating a state in which a corn paper pasted bent portion and a through hole are formed by pressing using a punch and a die.
FIG. 5 is a cross-sectional view in the width direction of a conventional speaker.
FIG. 6 is a diagram showing a front shape (a) and a cross-sectional shape (b) of a frame used in the speaker.
FIG. 7 is a perspective view showing a frame shape before (a) and after (b) punching a conventional frame.
[Explanation of symbols]
(1) Frame
(10) Sound outlet
(11) Damper pasting step
(12) Folding part with corn paper
(13) Through hole
(2) Corn paper
(3) Damper
(4) York
(5) Magnet
(6) Pole piece
(7) Voice coil
(8) Punch
(81) Punching punch
(82) Folding punch
(83) Dice
(84) Concave

Claims (4)

  A speaker device having an elliptical or elliptical sound outlet (10), wherein a megaphone-shaped cone paper (2) is disposed inside a megaphone-shaped frame (1), and the base of the cone paper (2) is provided. The end portion is connected to a reciprocating output portion of a reciprocating drive mechanism attached to a base end portion of the frame (1), and a damper (3) is interposed between the frame (1) and the output portion of the reciprocating drive mechanism. In the speaker device, the frame (1) has folds (12) and (12) with corn paper pasted on the both sides in the short axis direction of the sound emission opening (10) by bending the end of the frame (1) inward. In addition, a plurality of through holes (13) and (13) are formed along each cone paper sticking folding part (12), and the cone paper (2) is attached to both cone paper sticking folding parts (12) and (12). A speaker device, wherein an opening end portion is attached.   The damper (3) has an oval or elliptical outer peripheral edge and a circular inner peripheral edge, and is arranged with the short axis direction of the outer peripheral edge coinciding with the short axis direction of the sound emission port (10), The outer periphery of the damper (3) is attached to the damper attaching step (11) formed on the frame (1), and the inner periphery of the damper (3) is connected to the output part of the reciprocating drive mechanism. The speaker device according to claim 1.   The cone paper (2) has an oval or elliptical opening end, and is arranged such that the short axis direction of the opening end coincides with the short axis direction of the sound emission port (10). The speaker device according to claim 1 or 2, wherein the portion is attached to a cone paper attachment bent portion (12) formed at an opening end of the frame (1). Konpepa joining bent portion of the frame (1) (12) and the hole (13) (13), a pair of punch (8) and the die (83) those molded and stamped bending by press working using In addition, the folding portion (12) to which the corn paper is attached is provided for increasing the flatness by the clamping pressure between the punching punch portion (81) and the bending punch portion (82) of the punch ( 8 ) simultaneously with the bending molding. The speaker device according to any one of claims 1 to 3, wherein a pressing process is performed.

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