JP4246664B2 - Speaker mounting structure - Google Patents

Description

  The present invention relates to a speaker mounting structure.

  Conventionally, in-vehicle audio systems such as car stereos are mounted on vehicles. The in-vehicle audio system is configured to amplify an audio signal output from various audio devices such as a CD player, a radio, an MD player, and a cassette deck by an amplifier and output the audio signal from a speaker.

  As a mounting structure of the speaker of such an in-vehicle audio system, there has been known a structure in which a flange portion of a frame is interposed between an outer peripheral portion of an edge roll and a baffle plate, and the speaker is fixed to the baffle plate with a screw ( Patent Document 1).

FIG. 6 shows such a conventional speaker mounting structure, in which a magnet 51 is sandwiched between a top plate 52 and a yoke 53 at the base of a frame 50 expanded toward the front. A circuit 54 is attached, and a voice coil 56 is attached to a magnetic gap 55 of the magnetic circuit 54. A diaphragm 57 that is vibrated via a voice coil 56 is attached to the front side of the frame 50, and the outer peripheral edge of the diaphragm 57 and the flange portion 58 of the frame 50 are connected by an edge roll 59. Yes.
And when attaching the speaker of such a structure, in the state which installed the flame | frame 50 in the predetermined baffle plate 60, screw 62 is screwed in the screw hole 61 formed in the flange part 58 and the baffle plate 60. The speaker frame 50 is fixed.
JP-A-10-76883

However, in the speaker mounting structure described above, the speaker is fixed to the baffle plate 60 with the screws 62 that pass through the screw holes 61 formed in the outer peripheral portion of the edge roll 59, so that the outer peripheral portion of the edge roll 59 is attached to the frame 50. The flange portion 58 cannot be made larger. Therefore, the outer diameter of the diaphragm 57 is also reduced by the edge roll 59. Thus, when the outer diameter of the diaphragm 57 is reduced, the vibration area is reduced, so that there is a problem in that the low-frequency reproduction frequency cannot be lowered and the low-frequency sound quality cannot be improved.
Further, when the speaker is viewed from the front, the screw 62 is completely visible, and there is a problem that the appearance is impaired.

  The present invention has been made in view of the above points, and can ensure a large outer diameter of the diaphragm, can improve the sound quality of the low range by securing the vibration area of the diaphragm, and An object of the present invention is to provide a speaker that is excellent in appearance.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a speaker for mounting a speaker having a frame that is widened forward and has a flange portion formed on an outer peripheral edge thereof to a speaker mounting hole of a baffle plate. In the mounting structure, a spacer fixed by a fixing screw and urged toward the head of the fixing screw is disposed at a peripheral portion of the speaker mounting hole of the baffle plate, and the fixing screw is mounted on the flange portion. A fixing hole for engaging the head of the fixing screw is formed, the fixing hole of the flange portion is engaged with the fixing screw, and the flange portion is sandwiched and fixed by the head of the fixing screw and the spacer. It is characterized by that.

  According to a second aspect of the present invention, in the speaker mounting structure according to the first aspect, the spacer is composed of two spacer plates with a spring interposed therebetween.

  According to a third aspect of the present invention, in the speaker mounting structure according to the first or second aspect, the fixing hole includes a large-diameter portion through which a head of the fixing screw passes, and is connected to the large-diameter portion. The shaft portion of the fixing screw is composed of a small diameter portion through which it passes.

  According to a fourth aspect of the present invention, in the speaker mounting structure according to any one of the first to third aspects, the frame receiving recess is formed in the baffle plate.

  According to the speaker mounting structure of the present invention, the vibration area can be increased by the speaker having the same diameter, and the sound quality in the low sound range can be remarkably improved. In addition, it is possible to obtain a speaker that is excellent in appearance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing an embodiment of a speaker mounting structure according to the present invention. The speaker according to the present embodiment includes a frame 1 that expands toward the front, and the frame 1 includes a planar base portion 2 and a mounting flange portion 3 formed on an outer peripheral edge.

  A magnetic circuit 7 is attached to the rear surface side of the base 2 of the frame. The magnetic circuit 7 includes a yoke 9 having a disk shape and having a convex portion 8 protruding forward at a central portion. The convex portion 8 of the yoke has a hole 10 penetrating in the axial direction. Is formed. An annular top plate 11 is disposed on the front side of the yoke 9 and on the outer peripheral side of the convex portion 8 so as to have a magnetic gap 12 between the yoke 9 and the top plate 11. An annular magnet 13 is disposed between the two.

  A cylindrical voice coil 14 is mounted on the magnetic gap portion 12 of the magnetic circuit 7 configured as described above, and a voice coil is interposed between the outer peripheral surface of the voice coil 14 and the inner surface of the frame 1. A damper 15 for supporting 14 is disposed.

  In addition, a diaphragm 4 that expands toward the front is supported on an outer portion of the magnetic gap 12 of the voice coil 14, and a dust cap 16 that covers the voice coil 14 is disposed at the center of the diaphragm 4. Is installed. An edge roll 6 having a semicircular cross section is attached to the outer peripheral edge of the diaphragm 4 via an edge 5, and the outer peripheral edge of the edge roll 6 is bonded to the flange 3 of the frame 1. Are combined.

  A terminal 17 for connecting a predetermined electrical wiring is fixed to the rear surface side of the frame 1, and a voice coil 14 is electrically connected to the terminal 17 via a lead wire (not shown). It is connected. In general, the lead wire is drawn along the outer peripheral surface of the voice coil 14, is further drawn along the upper surface side of the diaphragm 4, and is connected to the tinsel wire 18 in the middle of the diaphragm 4. Pass through the lower surface side of the diaphragm 4 and is connected to the terminal 17. Then, an electric signal input from the terminal 17 causes a current to flow through the voice coil 14 and is transmitted to the diaphragm 4 by a driving force generated in the voice coil 14 disposed in the magnetic gap 12 so as to vibrate the diaphragm 4. It has become.

  Further, four fixing holes 31 are formed at substantially equal intervals in the circumferential direction in the flange portion 3 of the frame 1 and inside the edge roll 6. As shown in FIG. 2, the fixing hole 31 includes a large-diameter portion through which the head of the fixing screw 23 passes, and a shaft portion of the fixing screw 23 that is connected to the large-diameter portion and extends in the circumferential direction. And a small-diameter portion through which is passed. A support piece extending rearward is formed on the outer peripheral edge of the flange portion 3 of the frame 1.

  A speaker mounting hole 40 is formed in the baffle plate 20 for mounting the speaker, and an annular spacer 19 is disposed on the outer peripheral edge portion of the speaker mounting hole 40 of the baffle plate 20. Further, a frame receiving recess 22 is formed along the circumferential direction on the outer peripheral portion where the annular spacer 19 is disposed so that the support piece formed on the flange portion 3 of the frame 1 can be accommodated. It has become.

  As shown in FIG. 3, the spacer 19 includes two annular spacer plates. As shown in FIG. 4, a plurality of spring insertion holes 25 are formed on the mutually opposing surfaces of the spacer plates so as to have a predetermined interval in the circumferential direction. As shown in FIG. 25, a plurality of springs 24 that urge the spacer plates in directions away from each other are arranged. Each of these springs 24 is fixed by press-fitting or an adhesive. In addition, when the spacer 19 is resin and the spring 24 is metal, it is also possible to fix to the spacer 19 by high frequency welding.

  As shown in FIG. 4, four screw insertion holes 26 are formed at positions corresponding to the spacer plates so as to correspond to the fixing holes 31 formed in the flange portion 3 of the frame 1. Yes. The spacer 19 is fixed to the baffle plate 20 by inserting the fixing screw 23 into the screw insertion hole 26 and tightening it to the outer peripheral edge portion of the speaker mounting hole 40 of the baffle plate 20. The spacer 19 is positioned in the inner part of the support piece of the flange portion 3 of the frame 1.

  Next, the operation of this embodiment will be described.

  When attaching the speaker of this embodiment, first, the speaker frame 1 is positioned in the speaker mounting hole 40 of the baffle plate 20, the magnetic circuit 7 is positioned inside the baffle plate 20, and the flange portion 3 of the frame 1 is fixed. It installs so that the large diameter part of the hole 31 and the fixing screw 23 may overlap.

  Next, the large diameter portion of the fixing hole 31 of the flange portion 3 of the frame 1 is inserted into the head of the fixing screw 23, and the spacer plate on the upper side of the spacer 19 is pressed downward against the urging force of the spring 24. . At this time, the support piece of the flange portion 3 of the frame 1 is accommodated in the frame receiving recess 22 so that the frame is pushed downward. Then, by rotating the frame 1 in this state, the shaft portion of the fixing screw 23 is moved to the small diameter portion of the fixing hole 31.

  In this state, when the downward pressing force of the flange portion 3 of the frame 1 is released, the upper spacer plate returns to the direction of the flange portion 3 by the urging force of the spring 24, and the flange portion 3 of the frame 1 It is clamped and fixed by the head of the fixing screw 23.

  According to such a speaker mounting structure, since the speaker can be fixed to the baffle plate 20 by pressing and rotating the flange portion 3 of the frame 1 from above, a space for screwing the fixing screw 23 is provided. The edge roll 6 can be disposed up to the position where the flange portion 3 is covered without having to ensure. Therefore, a large outer diameter of the diaphragm 4 can be ensured.

  As described above, according to the speaker mounting structure of the present invention, since the outer diameter of the diaphragm 4 can be secured large, the vibration area in the diaphragm 4 can be formed large, and as a result, the low frequency range. The reproduction frequency can be lowered, and the sound quality in the low range can be remarkably improved. Moreover, since the flange portion 3, that is, the fixing screw 23 is covered with the edge roll 6, it is possible to obtain a speaker that is excellent in appearance.

It is a half sectional view showing an example of the structure of a speaker in an embodiment of the present invention. It is a top view which shows the flange part of the flame | frame in embodiment of this invention. It is sectional drawing which shows the spacer in embodiment of this invention. It is a top view which shows the spacer in embodiment of this invention. It is a partial cross section figure which shows the screw attachment part of the spacer in embodiment of this invention. It is a half sectional view showing an example of the structure of a conventional speaker.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame 2 Frame base part 3 Mounting flange part 4 Diaphragm 5 Edge 6 Edge roll 7 Magnetic circuit 8 Yoke convex part 9 Yoke 10 Yoke hole part 11 Top plate 12 Magnetic gap 13 Magnet 14 Voice coil 15 Damper 16 Dust cap 17 Terminal 18 Kinshi wire 19 Spacer 20 Baffle plate 21 Screw hole 22 Frame receiving recess 23 Screw 24 Spring 25 Spring insertion hole 26 Screw mounting hole 31 Fixing hole 40 Speaker mounting hole 50 Frame 51 Magnet 52 Top plate 53 York 54 Magnetic circuit 55 Magnetic gap 56 Voice coil 57 Diaphragm 58 Flange portion 59 Edge roll 60 Baffle 61 Screw hole 62 Screw 70 Speaker mounting hole

Claims (4)

In the speaker mounting structure for mounting a speaker having a frame that is widened toward the front and has a flange portion formed on the outer peripheral edge thereof to the speaker mounting hole of the baffle plate,
A spacer fixed by a fixing screw and urged toward the head of the fixing screw is disposed on the periphery of the speaker mounting hole of the baffle plate, and the head of the fixing screw is engaged with the flange. A fixing hole to be joined is formed, the fixing hole of the flange portion is engaged with the fixing screw, and the flange portion is sandwiched and fixed between the head of the fixing screw and the spacer. Speaker mounting structure.   2. The speaker mounting structure according to claim 1, wherein the spacer includes two spacer plates with springs interposed therebetween.   The fixing hole includes a large-diameter portion through which a head of the fixing screw passes, and a small-diameter portion connected to the large-diameter portion and through which a shaft portion of the fixing screw passes. Item 3. The speaker mounting structure according to Item 1 or 2.   The speaker mounting structure according to claim 1, wherein the frame receiving recess is formed in the baffle plate.

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