JP3646398B2 - Passive radiator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a passive radiator used in a speaker system of various audio devices.
[0002]
[Prior art]
Conventional techniques will be described with reference to FIGS. First, FIG. 8 is a side sectional view of a speaker system called a kelton system, which is composed of a driver B arranged in an enclosure A and a passive radiator C facing the outside, and the driver B drives the passive radiator C. In this way, the deep bass is enhanced and reproduced. FIG. 9 is a side view of the passive radiator C, and FIG. 10 is a structural side sectional view showing the concept of the passive radiator C.
[0003]
The configuration of the passive radiator C will be described with reference to FIG. Reference numeral 1 denotes a frame. The edge portion 3 of the diaphragm 2 which is a peripheral portion is adhesively bonded to the upper peripheral edge 1 b, and the inner peripheral edge portion of the diaphragm 2 is adhesively bonded to the bobbin 4. An intermediate portion of the bobbin 4 is clamped and supported by a damper 5 that is adhesively bonded to the inner peripheral portion 1 a of the bottom surface of the frame 1. A weight 6 is coupled to the upper end of the bobbin 4, and a dust cap 7 is bonded to the center of the upper surface of the diaphragm 2. Reference numeral 1c denotes a lower end portion that projects downward from the entire bottom surface of the frame 1 and protects the damper 5.
[0004]
[Problems to be solved by the invention]
However, since this type of conventional passive radiator has a large number of parts, it requires a large part material cost and a large number of man-hours for production. Therefore, it has been difficult to reduce the cost.
[0005]
In addition, there is a requirement that the mass of the vibration system is considerably heavy. If the weight 6 is designed to be heavy as a countermeasure, the weight 6 may be detached from the bobbin 4, and the dust cap 7 may be removed from the diaphragm 2. There is a possibility that the bobbin 4 and the damper 5 may come off from each other due to being detached from each other or by increasing the amplitude of the vibration system.
[0006]
An object of the present invention is to provide a passive radiator that solves such conventional problems, reduces the number of parts and the number of production steps, and achieves cost reduction.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, a passive radiator according to the present invention includes a frame having an opening at the center of the bottom surface, a damper having a peripheral edge attached to the opening of the frame, and a peripheral end connected to the upper end of the frame. And a weight sandwiched between the damper and the diaphragm at substantially the center of the damper.
[0008]
As described above, since the weight is sandwiched between the diaphragm and the damper, the bobbin can be removed and the assembly can be performed very easily. The weight , the diaphragm and the damper can be integrated to improve the quality. .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
According to a first aspect of the present invention, there is provided a frame having an opening at the center of the bottom surface, a damper having a peripheral edge attached to the opening of the frame, and a vibration in which a peripheral end is coupled to the upper end of the frame. Since the plate and the weight sandwiched between the damper and the diaphragm are formed in the approximate center of the damper, the number of parts can be reduced, and a stable product can be provided with extremely simple assembly. .
[0010]
According to a second aspect of the invention, since the structure provided integrally with a substantially central to the dust cap of the diaphragm according to claim 1, in which attained a reduction of reduction and assembling steps of the parts.
[0011]
According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, a hole is provided at the approximate center of the diaphragm or the approximate center of the dust cap, and at a position corresponding to the hole of the weight and the damper. Also, each is provided with a hole, and the diaphragm, weight and damper are integrated by a connecting means inserted into each hole, and the reliability of the connection of the three parts is improved.
[0012]
The invention according to claim 4, which has provided a protrusion of the lower end and substantially the same height of the frame at a substantially central lower surface of the damper of the first aspect, deformation of the damper generated by the weight of the weights during assembly This can be prevented without producing a lower mold for assembly according to the shape, and the increase in cost and management cost due to the use of a dedicated jig can be prevented.
[0013]
According to the fifth aspect of the present invention, a protrusion having a height substantially the same as the lower end of the frame is protruded from the damper on the substantially central lower surface of the weight having the structure of the first aspect. Although it is obtained, since the weight of the weight is supported by the protruding portion provided on the weight , the damper is not affected at all.
[0014]
According to the sixth aspect of the present invention, the height of the leg portion of the coupling means of the configuration of the third aspect is substantially the same as the lower end of the frame, and the weight of the weight is supported by the coupling means during assembly. In addition to preventing deformation of the damper, the diaphragm, weight, and damper are mechanically integrated to improve the reliability of the connection of the three components.
[0015]
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0016]
(Embodiment 1)
FIG. 1 is a side sectional view of an embodiment of a passive radiator according to the present invention. According to the figure, 11 is a frame having an opening 11a on the bottom surface, 15 is a damper formed by bonding the peripheral edge to the opening 11a, and a flat portion for placing a weight 16 in the center. 15a.
[0017]
Reference numeral 12 denotes a diaphragm that is bonded and bonded to the upper end of the frame 11 via a peripheral edge portion 13, and the weight 16 is bonded to the damper 15.
[0018]
Reference numeral 12 a denotes a dust cap portion that directly attaches and holds the weight 16 to the damper 15, and is provided integrally with the diaphragm 12.
[0019]
As described above, since the weight 16 is sandwiched and bonded in the present embodiment, the bobbin can be deleted and the mounting reliability can be improved as compared with the conventional bobbin support. Can be achieved.
[0020]
In addition, since the frame 11, the damper 15, the weight 16, and the diaphragm 12 can be stacked and assembled in order from the bottom, the structure is suitable for automatic assembly including a bonding process such as adhesion.
[0021]
In this embodiment, the dust cap portion 12a is provided integrally with the diaphragm 12. However, if there is no problem in appearance, the dust cap portion 12a is not particularly provided, and the weight 16 is provided by the diaphragm 12 itself and the damper 15. It may be pinched.
[0022]
(Embodiment 2)
FIG. 2 is a side sectional view of another embodiment of the passive radiator according to the present invention, in which 15c is provided on the damper 15b, 16b is provided on the weight 16a, and 12d is provided on the dust cap portion 12c of the diaphragm 12b. The through hole 12d is provided corresponding to the through hole 15c and the through hole 16b, respectively.
[0023]
Reference numeral 17 denotes a rivet, which is inserted into the through holes 12d, 15c, and 16b and caulked to mechanically connect the diaphragm 12b, the weight 16a, and the damper 15b. The strength of the bond is improved and the reliability is improved.
[0024]
In this embodiment, the rivet 17 is used as a coupling means for the diaphragm 12b, the weight 16a, and the damper 15b. However, it is also possible to use a bolt, a nut, a split pin, or the like.
[0025]
(Embodiment 3)
This embodiment is a further improvement of the first embodiment shown in FIG. 1. FIG. 3 is a side sectional view in the middle of manufacturing a passive radiator for explaining the problems leading to the present embodiment. FIG. FIG. 5 is a side sectional view of a passive radiator for explaining a state at the time of assembly, and FIG. 5 is a side sectional view of the present embodiment.
[0026]
The assembly of the first embodiment will be described with reference to FIGS. 3 and 4. First, the damper 15 is coupled to the frame 11 as shown in FIG.
[0027]
Next, the weight 16 is adhesively bonded onto the damper 15. However, since the weight 16 is heavy, when the weight 16 is placed on the damper 15, the damper 15 is deformed into a shape that falls downward as shown in FIG. 3 due to the weight of the weight 16, and the next process cannot be performed. Therefore, as shown in FIG. 4, it is necessary to produce using an assembly dedicated jig 18 under the frame 11 and the damper 15.
[0028]
FIG. 5 also solves the above-described problem, and only the difference from the passive radiator of the first embodiment will be described. Reference numeral 15e denotes a projecting portion that projects downward at substantially the center of the lower end of the damper 15d. The damper protection portion 11b at the lower end of the frame 11 is set to have substantially the same height surface.
[0029]
With the above configuration, when placed on a flat plate, the weight 16 is not deformed by the weight of the weight 16, so that the assembly-specific jig 18 prepared according to the diameter of the passive radiator at the time of assembly is unnecessary, and this assembly-specific jig is not required. The production cost and management cost of the jig 18 are reduced, and the assembly work is facilitated.
[0030]
(Embodiment 4)
FIG. 6 is a side cross-sectional view of another embodiment having the same effect as that of the third embodiment, and only differences from the first embodiment will be described. 15f is a damper, 16c is a weight , and Has a protruding portion 16d protruding from the hole 15g of the damper 15f, and this protruding portion 16d is set to be substantially the same height as the damper protecting portion 11b at the lower end of the frame 11.
[0031]
With the above configuration, the assembly dedicated jig 18 (see FIG. 4) described in the third embodiment, which has been prepared according to the diameter of the passive radiator at the time of assembly, is not necessary. In addition to reducing management costs and facilitating assembly work, the protrusion 16d is generally provided on the weight 16c having a high hardness, so that it is easy to handle without being damaged by direct external force. It is what.
[0032]
(Embodiment 5)
FIG. 7 is a side sectional view of another embodiment having the same effect as that of the third embodiment, and only differences from the second embodiment will be described. 17a is a rivet, and protects a damper at the lower end of the frame 11. A leg portion 17b having substantially the same height as the portion 11b is provided.
[0033]
That is, the diaphragm 12b, the weight 16a, and the damper 15b can be physically and firmly coupled by the rivet 17a as the coupling means, and prepared according to the bottom diameter of the passive radiator at the time of assembly by the leg portion 17b of the coupling means. This eliminates the need for assembly jigs, reduces production costs and management costs for these assembly jigs, facilitates assembly work, and is extremely useful without being damaged by direct external forces. It can be provided as a passive radiator.
[0034]
【The invention's effect】
As described above, the passive radiator of the present invention has a structure in which the weight is sandwiched between the diaphragm and the damper, so that the number of parts can be reduced and the assembly can be easily performed, and the quality of the integration of the weight , the diaphragm and the damper can be reduced. The improvement of this can also be achieved.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing the concept of an embodiment of a passive radiator of the present invention. FIG. 2 is a side sectional view showing the concept of another embodiment. FIG. FIG. 4 is a side sectional view showing the concept of the other embodiment. FIG. 5 is a side sectional view showing the concept of the other embodiment. FIG. 6 is a side sectional view showing the concept of the other embodiment. FIG. 7 is a side sectional view showing the concept of the other embodiment. FIG. 8 is a side sectional view of a conventional speaker system using a passive radiator. FIG. 9 is a side view of the passive radiator. Side sectional view showing the concept 【Explanation of symbols】
DESCRIPTION OF SYMBOLS 11 Frame 11a Opening part 11b Damper protection part 12 Diaphragm 12a Dust cap part 12d Through-hole 15,15b, 15d Damper 15c Through-hole 15e Protrusion part 16,16a, 16c Weight 16b Through-hole 16d Protrusion part 17,17a Rivet 17b Leg part

Claims (6)

A frame having an opening at the center of at least the bottom; a damper having a peripheral edge attached to the opening of the frame; a diaphragm having a peripheral end coupled to an upper end of the frame; and a damper at a substantially center of the damper. And a passive radiator composed of a weight sandwiched between the diaphragms. The passive radiator according to claim 1, wherein a dust cap portion is integrally provided at substantially the center of the diaphragm. A hole is provided in the approximate center of the diaphragm or in the approximate center of the dust cap part , and a hole is provided at a position corresponding to the above-described hole part of the weight and the damper, and a coupling means inserted into each hole part. The passive radiator according to claim 1, wherein the diaphragm, the weight, and the damper are integrated.   The passive radiator according to claim 1, wherein a protrusion having a height substantially the same as that of the lower end of the frame is provided on at least a substantially lower surface of the damper. 2. The passive radiator according to claim 1, wherein a protrusion having a height substantially the same as the lower end of the frame is protruded from the damper at least at a substantially lower surface of the weight .   The passive radiator according to claim 3, wherein at least the height of the legs of the coupling means is substantially the same as the lower end of the frame.

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