JP4264027B2 - Speaker - Google Patents

Description

  The present invention relates to a speaker, and more particularly to a speaker in which a diaphragm is supported without using an adhesive.

  In recent years, Hi-Fi speaker systems have been used for reasons such as a wide reproduction band and excellent directivity and sound quality. Many of the mid-high sound speakers in this speaker system are shown in FIGS. As shown in the drawing, the diaphragm 101 is supported by adhering a frame 104 to an edge peripheral edge 103 having a planar shape at the edge 102 provided on the outer periphery of the diaphragm 101 with an adhesive.

  However, in the method of fixing the edge portion of the diaphragm to the frame with an adhesive, very strict management is required for the concentration management of the adhesive to be used, the application amount, the selection of the application position, etc., and the above-mentioned conditions are not satisfied. And the adhesive state of the adhesive on the diaphragm varies, affecting the rigidity of the diaphragm, changing the low-frequency characteristics, making the characteristics of the speaker unstable, and using the adhesive over time. There was a problem.

Therefore, by using a restraining member having a simple structure as a speaker that can prevent a change in characteristics in the low sound range and greatly improve the productivity of the speaker, the outer peripheral edge of the edge portion of the diaphragm Has been developed that uniformly presses and holds the diaphragm in pressure contact (see, for example, Patent Document 1).
JP 2002-247688 A

  However, in a speaker that employs the fixing structure with the above-described holding member, when the diaphragm is horizontally rotated, the diaphragm is likely to be displaced in the circumferential direction. As a result, the diaphragm flutters and affects the sound quality. The problem of giving

  On the other hand, in the fixing structure using the adhesive, in addition to the above-described problems such as unstable characteristics, the outer diameter dimension of the speaker is limited by the mounting conditions and the like. If the screw hole 105 for attaching the speaker to the outer diameter side of the fixed position is drilled, it becomes difficult to change the design such as expanding the diameter of the diaphragm including the edge portion, and the screw hole 105 is screwed. Further, the exposed external appearance of the screw 106 causes a problem that the aesthetic appearance is impaired.

  The present invention has been made in view of the above-described points, and by virtue of a simple structure that does not use an adhesive, the diaphragm is firmly supported, and the design of the diaphragm can be changed even within a limited range of outer dimensions of the frame. It is an object to provide a speaker that facilitates and improves the design.

In order to solve the above problems, a speaker according to the invention described in claim 1 is:
A frame provided with an engagement portion on the inner peripheral wall;
A diaphragm provided with an edge portion having an edge portion outer peripheral edge with a wall thickness smaller than the width dimension of the engagement portion;
A gasket provided with a flange on one end side,
The diaphragm engages the outer peripheral edge of the edge portion with the engaging portion, and press-fits the flange portion into a gap formed between the engaging portion and the outer peripheral edge of the edge portion. And the frame, the flange portion is provided with a protruding piece protruding in the outer peripheral direction,
The outer wall surface of the frame, characterized that you have an opening portion is provided for pushing the projecting piece to the inside by the jig.

  A speaker according to a second aspect of the present invention is characterized in that a protrusion for locking the gasket is provided on one surface side of the outer peripheral edge of the edge portion.

  The speaker according to a third aspect of the invention is characterized in that the protruding portion can be deformed in accordance with the pressing force.

  The speaker according to the invention described in claim 4 is characterized in that a concave portion is provided on the other surface side of the outer peripheral edge of the edge portion at a location corresponding to the back side of the protruding portion.

The speaker according to the invention described in claim 5 is characterized in that the edge portion and the gasket are formed of an elastic member.

  According to the present invention, the frame provided with the engaging portion on the inner peripheral wall, the diaphragm provided with the edge portion having the outer peripheral edge of the wall thickness smaller than the width dimension of the engaging portion, and the flange on one end side A diaphragm provided with a portion, and the diaphragm engages the outer peripheral edge of the edge portion with the engaging portion, and press-fits the flange portion into a gap formed between the engaging portion and the outer peripheral edge of the edge portion. Since the gasket and the frame are pressed against each other, the edge of the diaphragm can be attached and detached, so that a screw hole can be drilled on the inner diameter side of the frame relative to the edge. As a result, the design of the diaphragm can be easily changed and the design can be improved even within the limited range of the outer dimensions of the frame.

  Further, since a protrusion for locking the gasket is provided on one surface side of the outer peripheral edge of the edge, it is possible to restrict the gasket press-fitted into the gap from moving in the direction opposite to the press-fitting direction. Thus, the pressing force of the gasket against the diaphragm can be maintained, and the diaphragm can be firmly pressed against the frame.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

The speaker according to this embodiment will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the speaker 1 according to the present invention is provided with an annular frame 2 formed by die-casting an aluminum alloy or zinc alloy as shown in FIG. The outer shape of the frame 2 is formed in a shape in which the bottom surfaces of substantially frustoconical shapes having different sizes are joined to each other, and a step portion having a plane parallel to the opening surface of the frame 2 is provided inside the frame 2. 3 is formed along the circumferential direction. Further, as shown in FIG. 4, a groove 4 having a quadrangular cross-sectional shape is formed along the circumferential direction on the outer diameter side of the stepped portion 3, and the frame 2 is attached to the inner diameter side of the groove 4. A screw hole 5 for screwing a screw for fixing the portion is formed at regular angular intervals along the circumferential direction. In addition, the inner peripheral wall of the frame 2 is provided with an engagement portion 6 having a square cross-sectional shape along the circumferential direction, and an opening 7 having a substantially square shape.

  Further, as shown in FIG. 5, a substantially frustoconical diaphragm 8 is provided on the upper surface of the stepped portion 3 of the frame 2, and the diaphragm 8 inputs the voice coil (not shown). The vibration converted from the mechanical input vibration into the mechanical vibration is output as sound corresponding to the input signal. As shown in FIG. 6, a semicircular edge portion 9 made of a synthetic resin such as rubber is provided on the outer peripheral portion of the diaphragm 8 along the circumferential direction so as to be integrated with the diaphragm 8. The edge portion outer peripheral edge 10, which is the outer peripheral edge of the edge portion 9, has a planar shape and is formed on the inner peripheral wall of the frame 2 so that the thickness thereof is smaller than the width dimension of the engaging portion. The engagement portion 6 is engaged. Further, on the surface side of the edge portion 9 that faces the stepped portion 3 of the frame 2, a convex portion 11 having a quadrangular cross-sectional shape is provided along the circumferential direction except for a part, and at a portion where the convex portion is not provided. Has a concave section 12 having a triangular cross-sectional shape. On the other hand, on the opposite surface side, a protrusion 13 having a triangular cross-sectional shape is provided at a location corresponding to the back side of the recess 12.

  Further, as shown in FIG. 7, an annular gasket 14 that is partially cut in the axial direction is provided on the side of the edge portion 9 that faces the protruding portion 13. As shown in FIG. 8, an outwardly projecting flange portion 15 is formed along the circumferential direction. As shown in FIGS. 9 to 11, the flange portion 15 includes the engagement portion 6 of the frame 2, and It is press-fitted into a gap formed between the outer peripheral edge 10 of the edge portion. Further, a protruding piece 16 protruding outward from the flange portion 15 is formed in the vicinity of the cut surface and is press-fitted into the opening 7 of the frame 2.

  Note that the gasket 14 is not limited to the present embodiment, and may be any shape as long as it suppresses the flapping sound of the edge portion 9 when the vibration plate 8 has an amplitude.

Next, the operation of this embodiment will be described.
When the diaphragm 8 is fixed to the frame 2, first, as shown in FIG. 12, screw holes (not shown) drilled at desired attachment locations, and the upper surface of the stage portion 3 of the frame 2. The frame 2 is fixed to the mounting location by matching the screw holes 5 formed in the holes and screwing screws 17 into these screw holes. Next, as shown in FIG. 13, the diaphragm 8 is introduced into the frame 2, and the convex portion 11 provided on the edge portion 9 of the diaphragm 8 is made to coincide with the groove 4 of the paragraph portion 3 of the frame 2. At the same time, the outer peripheral edge 10 of the edge part is engaged with the engaging part 6 of the frame 2. Further, as shown in FIG. 14, the gasket 14 is introduced into the frame 2, and the flange portion 15 of the gasket 14 is inserted into the gap formed between the engaging portion 6 of the frame 2 and the outer peripheral edge 10 of the edge portion. Finally, the projecting piece 16 is press-fitted until the projecting piece 16 is completely fitted into the opening 7 of the frame 2, so that the diaphragm 8 is pressed into contact with the gasket 14, and the diaphragm 8 is brought into contact with the frame 2. Supported.

  At this time, as the protruding piece 16 of the gasket 14 is press-fitted in the outer diameter direction from the inner wall side of the frame 2, the protruding piece 16 presses the protruding portion 13 of the edge portion 9 while moving in the outer diameter direction, The projecting portion 13 is compressed and deformed toward the concave portion 12 on the opposite surface side. Further, the projecting piece 16 is press-fitted so that the projecting piece 16 is completely fitted into the opening 7. When the pressing force received from 16 is released and its shape returns to its original state, the protruding piece 16 fitted in the opening 7 is restricted from moving in the inner diameter direction.

  On the other hand, when the diaphragm 8 is removed from the frame 2, a pin-shaped jig is inserted into the opening 7 from the outer wall side of the frame, and as shown in FIG. When the pin-shaped jig is pressed in the inner diameter direction of the frame 2, the protruding piece 16 of the gasket 14 is removed from the opening 7 of the frame 2, and the flange portion 15 of the gasket 14 is removed from the engaging portion 6. Then, the diaphragm 8 is taken out from the inside of the frame 2.

  At this time, as the protruding piece 16 is pressed from the outer wall side of the frame 2 in the inner diameter direction, the protruding piece 16 presses the protruding portion 13 of the edge portion 9 while being moved in the inner diameter direction. Compressed and deformed toward the concave portion 12 on the opposite surface side, and the protruding piece 16 is further pressed and the protruding piece 16 is completely removed, and at the same time, the protruding portion 13 is released from the pressing force received from the protruding piece 16, The shape returns to its original state.

  As described above, according to the speaker 1 of the present embodiment, the frame 2 having the engaging portion 6 provided on the inner peripheral wall and the edge portion 9 having the edge portion outer peripheral edge 10 having a wall thickness smaller than the width dimension of the engaging portion 6. And a gasket 14 provided with a flange portion 15 on one end side. The diaphragm 8 engages the outer peripheral edge 10 of the edge portion with the engaging portion 6, and the engaging portion 6. Since the flange portion 15 is press-fitted into a gap formed between the outer peripheral edge 10 and the edge portion 10 so that the gasket 14 and the frame 2 are pressed against each other, the edge portion 9 of the diaphragm 8 can be attached and detached. By doing so, it is possible to make the screw hole 5 on the inner diameter side of the frame 2 from the fixing position with the edge portion 9, so that the diaphragm 8 can be formed even within the limited range of the outer dimensions of the frame 2. Easy design changes Kill.

  Further, since a protrusion 13 for locking the gasket 14 is provided on one surface side of the outer peripheral edge 10 of the diaphragm 8, the gasket 14 press-fitted into the gap moves in the inner diameter direction. Thus, the pressing force of the gasket 14 against the diaphragm 8 can be maintained, and the diaphragm 8 can be firmly pressed against the frame 2.

It is a top view which shows the speaker which concerns on this invention. It is a perspective view which shows the speaker which concerns on this invention. It is a perspective view which shows the flame | frame with which the speaker which concerns on this invention is equipped. It is a perspective view which shows the cross section of the flame | frame comprised by the speaker which concerns on this invention. It is a perspective view which shows the diaphragm with which the speaker which concerns on this invention is equipped. It is a perspective view which shows the cross section of the diaphragm with which the speaker which concerns on this invention is equipped. It is a perspective view which shows the gasket with which the speaker which concerns on this invention is equipped. It is a perspective view which shows the cross section of the gasket with which the speaker which concerns on this invention is equipped. It is a longitudinal cross-sectional view which shows the speaker which concerns on this invention. It is a perspective view which shows the cross section of the protrusion piece of the gasket in the speaker which concerns on this invention. It is a perspective view which shows cross sections other than the protrusion piece of the gasket in the speaker which concerns on this invention. It is a perspective view which shows the aspect of the attachment operation | work of the speaker which concerns on this invention. It is a perspective view which shows the aspect of the attachment operation | work of the speaker which concerns on this invention. It is a perspective view which shows the aspect of the attachment operation | work of the speaker which concerns on this invention. It is a perspective view which shows the aspect of the removal operation | work of the speaker which concerns on this invention. It is a perspective view which shows the speaker in a prior art. It is a top view which shows the speaker in a prior art. It is the enlarged view to which the attachment part of the speaker in a prior art was expanded.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Speaker 2 Frame 6 Engagement part 7 Opening part 8 Diaphragm 9 Edge part 10 Edge part outer periphery 12 Recess 13 Projection part 14 Gasket 15 Flange part 16 Projection piece

Claims (5)

A frame provided with an engagement portion on the inner peripheral wall;
A diaphragm provided with an edge portion having an edge portion outer peripheral edge with a wall thickness smaller than the width dimension of the engagement portion;
A gasket provided with a flange on one end side,
The diaphragm engages the outer peripheral edge of the edge portion with the engaging portion, and press-fits the flange portion into a gap formed between the engaging portion and the outer peripheral edge of the edge portion. Between the frame and the frame ,
The flange portion is provided with a protruding piece protruding in the outer peripheral direction,
Speaker on the outer wall surface of the frame, characterized that you have an opening portion is provided for pushing the projecting piece to the inside by the jig.   The speaker according to claim 1, wherein a projecting portion for locking the gasket is provided on one surface side of the outer peripheral edge of the edge portion. The speaker according to claim 2 , wherein the protrusion is deformable according to a pressing force. The speaker according to claim 2 or 3 , wherein a concave portion is provided on the other surface side of the outer peripheral edge of the edge portion at a location corresponding to the back side of the protruding portion. The edge portion and the gasket, a speaker according to claim 1, any one of 4, characterized in that it has been formed by an elastic member.

Images