JP2006140957A - Vehicle-mounted speaker system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle-mounted speaker system by which a large network coil is firmly fixed to both ends and damage of the network coil by submergence is also prevented. <P>SOLUTION: The network coil 41 is firmly fixed to a speaker frame 33 to both ends by vertically attaching a binding band 42 on periphery of the network coil 41, forming an assembly 44 by fixing the binding band 42 to the network coil 41 by performing thermal contraction of a thermal contraction tube 43 into which the binding band 42 and the network coil 41 are inserted and binding the binding band 42 of the assembly 44 to a proper part on the speaker frame 33 and the submergence is also prevented by the thermal contraction tube 43 which covers circumference of the network coil 41. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle-mounted speaker device in which a network coil is fixed on a speaker frame by a binding band.

  In an in-vehicle speaker system that constitutes a multi-way speaker system in an in-vehicle audio system or the like, a resin terminal board is attached to a speaker frame that supports the diaphragm of the speaker unit due to restrictions on the installation space on the vehicle body side. Various configurations have been developed in which a network element is attached to a terminal board.

FIG. 1 shows a resin terminal board 1 attached to a speaker frame in such a vehicle-mounted speaker device, and network elements 3 and 4 attached to the resin terminal board 1.
In addition to the network elements 3 and 4, the resin terminal board 1 is equipped with input terminals 7a and 7b for connecting output lines from an external amplifier or the like. Conventionally, as a structure for fixing the resin terminal board 1 to the speaker frame, a structure in which a female screw is processed in the speaker frame and screwed is known (see, for example, Patent Document 1). .

The large network element on the resin terminal board 1 is a network coil 3 (choke coil), and the small network element 4 is a capacitor or a resistor, both of which are fixed to the resin terminal board 1 without being exposed. (For example, refer to Patent Document 2).
In the case of the small and light network element 4, it is fixed to the resin terminal board 1 by soldering a lead wire to a terminal fitting fixed to the resin terminal board 1 side. However, the large and heavy network coil 3 cannot obtain a sufficient fixing strength to withstand vehicle body vibration only by soldering lead wires. Therefore, conventionally, as shown in the figure, a resin binding band 9 is wound around the outer periphery, and the binding band 9 is used to bind and fix to the resin terminal board 1.

Japanese Patent Laid-Open No. 2004-187233 Japanese Patent Laid-Open No. 2001-251694

However, in the structure for fixing the network coil by the binding band 9 as shown in FIG. 1, the binding force by the binding band 9 is effective only in a partial region in the axial direction around which the binding band 9 is wound. The ends 3a and 3b of the coil 3 cannot be firmly fixed.
For this reason, vibrations during traveling of the vehicle cause vibrations in the direction orthogonal to the central axis of the coil as shown by arrows (A) and (B) at both ends 3a and 3b, leading to deterioration of acoustic characteristics. Or, there is a possibility that damage such as fatigue may be caused to an electrical connection portion or the like.

  In addition, since the network coil 3 is mounted in an exposed state, water droplets due to dew condensation generated on the inner surface of the vehicle body panel to which the speaker device is attached drop on the network coil 3 and the element is damaged due to moisture. There was also a fear.

  Further, as shown in FIG. 1, when the fixing position by the binding band 9 is the resin terminal board 1, a large installation space for placing the network coil 3 on the resin terminal board 1 must be secured. In other words, the resin terminal board 1 is increased in size, and the increase in the resin terminal board 1 is a factor that hinders downsizing of the in-vehicle speaker device or increases the cost.

  As a problem to be solved by the present invention, a large network coil is firmly fixed to both ends to prevent deterioration of acoustic characteristics due to the vibration of the coil and occurrence of fatigue in an electrical connection portion or the like. In addition, it is possible to provide a vehicle-mounted speaker device that can prevent the network coil from being soiled by water droplets. Further, the downsizing of the resin terminal board facilitates the downsizing of the vehicle-mounted speaker device. An example is to provide a vehicle-mounted speaker device capable of reducing the cost.

  In order to solve the above-described problem, the vehicle-mounted speaker device according to claim 1 is a vehicle-mounted speaker device in which a network coil is fixed on a speaker frame by a binding band, and the binding band is provided on an outer periphery of the network coil. A heat shrinkable tube through which the binding band and the network coil are inserted is heat-shrinked to form an assembly in which the binding band is fixed to the network coil, and the binding band of the assembly is connected to the speaker. The network coil is fixed on the speaker frame by binding to an appropriate place on the frame.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a vehicle-mounted speaker device according to the present invention will be described in detail with reference to the drawings.

  2 to 4 show an embodiment of an in-vehicle speaker device according to the present invention, FIG. 2 is a longitudinal sectional view of an embodiment of the in-vehicle speaker device according to the present invention, and FIG. FIG. 4 is a schematic view showing a state in which the network coil attachment portion shown in FIG. 2 and the binding band are inserted through a heat-shrinkable tube.

  The vehicle-mounted speaker device 31 of this embodiment includes a magnetic circuit 5, a speaker frame 33 to which the magnetic circuit 5 is attached at the rear, and a cone type in which an edge 35 having a substantially semicircular cross section is connected to the outer periphery. Diaphragm 37, cylindrical voice coil bobbin 11 attached to the inner periphery of diaphragm 37, voice coil 12 wound around this voice coil bobbin 11, and resin terminal board 25 for mounting a network element. And a network coil 41 as a network element.

The magnetic circuit 5 includes a yoke 15 having a structure in which a cylindrical center pole 15b projects from the center of a disk-shaped plate 15a, a ring-shaped magnet 16 that is loosely fitted on the outer periphery of the center pole 15b, and a plate 15a. And a ring-shaped top plate 17 that is loosely fitted to the front end side of the center pole 15b so as to sandwich the magnet 16 therebetween, and the top plate 17 is fixed to the rear end of the speaker frame 33. Yes.
In this magnetic circuit 5, a gap between the inner periphery of the top plate 17 and the center pole 15b is a magnetic gap in which the voice coil 12 is disposed.

  The voice coil bobbin 11 fixed to the inner peripheral edge of the diaphragm 37 is connected to the speaker frame 33 via a corrugation damper 39 in which peaks and valleys are alternately arranged concentrically along the radial direction. It is suspended so as to be movable in the axial direction of the pole 15b.

The outer peripheral edge 35 of the diaphragm 37 has an attachment flange portion 35a extending to the outer peripheral edge thereof to an outer peripheral portion 33a of the speaker frame 33 extending outside the speaker mounting opening diameter d1 of the speaker attachment plate 21. The mounting flange portion 35a is clamped by the resin packing 47 that is attached and fixed to the outer peripheral portion 33a, and is fixed to the outer peripheral portion 33a.
A flange portion 35 b extending to the inner peripheral edge of the edge 35 is bonded and integrated with the back surface of the diaphragm 37.

The speaker frame 33 is a press-molded product of a metal plate, and a flat portion 33b for attaching the corrugation damper 39 is formed at a position extending forward from the rear plate 33e serving as the attachment portion of the magnetic circuit 5, and this flat portion. An attachment flange portion 33c for attaching the resin terminal board 25 is integrally formed so as to be continuous with 33b.
The mounting flange portion 33c is a flat plate extending radially outward from the outer periphery of the flat portion 33b, and is formed by cutting up a plate material in a region where the opening of the speaker frame 33 is formed.

The resin-made terminal board 25 is a resin-made board material fixed to the mounting flange portion 33c of the speaker frame 33 by screwing or engagement of a locking projection or the like, and is necessary for a network circuit of the in-vehicle speaker device 31. Among the parts, it is a small part (for example, a resistance element, a capacitor element, etc.) excluding the network coil and a mounting part for terminal fittings.
In the case of the present embodiment, the network coil 41 necessary for the network circuit is fixed to the speaker frame 33 by the resin binding band 42 alone, not on the resin terminal board 25.

Hereinafter, a structure for attaching the network coil 41 to the speaker frame 33 in the present embodiment will be described in detail.
As shown in FIG. 4, a resin binding band 42 is vertically attached to the outer periphery of the network coil 41, and the heat shrinkable tube 43 through which the binding band 42 and the network coil 41 are inserted is thermally contracted. An assembly 44 in which the binding band 42 is fixed to the network coil 41 is formed, and the binding band 42 of the assembly 44 is cylindrical at a position near the rear end between the rear plate 33e and the flat portion 33b on the speaker frame 33. A state where the network coil 41 is fixed near the resin terminal board 25 on the speaker frame 33 is obtained by winding and binding the outer peripheral portion 33d.

As described above, the in-vehicle speaker device 31 according to the embodiment of the present invention is the in-vehicle speaker device 31 in which the network coil 41 is fixed on the speaker frame 33 by the binding band 42, and the network coil 41. A binding band 42 is vertically attached to the outer periphery of the wire, and a heat shrink tube 43 through which the binding band 42 and the network coil 41 are inserted is thermally contracted to form an assembly 44 in which the binding band 42 is fixed to the network coil 41. Then, the network coil 41 is fixed on the speaker frame 33 by binding the binding band 42 of the assembly 44 to an appropriate place on the speaker frame 33.
Thus, since the binding band 42 vertically attached to the network coil 41 is tightly fixed to the outer periphery of the network coil 41 by the heat shrinkable tube 43, the binding band 42 is wound around the appropriate position on the speaker frame 33 and bound. In this case, the both ends of the network coil 41 can be firmly fixed to the speaker frame 33.
Therefore, even when the large network coil 41 is firmly fixed to the both ends of the speaker frame 33 and the vibration during traveling of the vehicle is propagated, it is possible to prevent the network coil 41 from generating a vibration. Therefore, it is possible to prevent the deterioration of the acoustic characteristics due to the vibration of the coil and the occurrence of fatigue in the electrical connection portion.
Moreover, since the circumference | surroundings of the network coil 41 are covered with the heat-shrinkable tube 43 and do not become a bare attachment state, the water droplet by condensation on the inner surface etc. of the vehicle body panel to which the vehicle-mounted speaker device 31 is attached is dropped. Even if there is water, it is possible to avoid that the water droplets are in direct contact with the network coil 41, and it is possible to prevent the network coil 41 from being soiled by water.

Further, in the vehicle-mounted speaker device 31 of the present embodiment, the network coil 41 is directly fixed on the speaker frame 33 by winding the binding band 42 directly around the cylindrical outer peripheral portion 33d of the speaker frame 33 and binding them. become.
Therefore, it is not necessary to secure an installation space for the network coil 41, which is a large component, in the resin terminal board 25 provided in the speaker frame 33 for arranging the components constituting the network circuit. The terminal board 25 can be reduced in size, and the downsizing of the resin terminal board 25 can promote the downsizing of the in-vehicle speaker device 31 and reduce the cost.

  In the above embodiment, the cylindrical outer peripheral portion 33d that is the attachment portion of the network coil 41 forms a groove-like space that is recessed from the outer peripheral portion of the magnetic circuit 5 as shown in FIG. In addition, since the space is effectively utilized as a mounting space for the network coil 41, the outward projecting amount of the fixed network coil 41 can be suppressed, and the in-vehicle speaker device 31 can be efficiently downsized. Have achieved.

The attachment position of the assembly 44 is not limited to the cylindrical outer peripheral portion 33d shown in the above embodiment. As long as an installation surface enough to install the network coil 41 can be secured, other parts on the speaker frame may be used. However, in order to make the wiring between the network coil and other network elements as short as possible, it is desirable to select the periphery of the position where the resin terminal board 25 is provided.
In that respect, the above-described cylindrical outer peripheral portion 33d is optimal.

It is explanatory drawing of the attachment structure of the resin-made terminal board attached to the speaker frame of the conventional vehicle-mounted speaker apparatus, and the network element on this resin-made terminal board. 1 is a longitudinal sectional view of an embodiment of a vehicle-mounted speaker device according to the present invention. It is the perspective view which looked at the attachment part of the network coil of FIG. 2 from the arrow III direction. It is the schematic of the state which penetrated the network coil and the binding band shown in FIG. 2 to the heat contraction tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Magnetic circuit 21 Speaker mounting plate 31 Speaker apparatus 33 Speaker frame 33a Outer peripheral part 35 Edge 35a Mounting flange part 37 Diaphragm 39 Corrugation damper 41 Network coil 42 Binding band 43 Heat shrinkable tube 44 Assembly 47 Resin packing

Claims (2)

An in-vehicle speaker device in which a network coil is fixed on a speaker frame by a binding band,
Attaching a binding band vertically to the outer periphery of the network coil, and heat-shrinking the heat-shrinkable tube through which the binding band and the network coil are inserted, thereby forming an assembly in which the binding band is fixed to the network coil,
A vehicle-mounted speaker device, wherein the network coil is fixed on the speaker frame by binding the binding band of the assembly to an appropriate location on the speaker frame.   The in-vehicle speaker device according to claim 1, wherein a binding band fixed to the network is wound around a cylindrical outer peripheral portion near a rear end of the speaker frame and bound.

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