JP2010034984A - Speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a speaker body 18, to be mounted independently of the diameter of a spare tire housing space 11, even if the diameter of the housing space 11 differs by each type of car, when a speaker 10 is arranged utilizing the housing space 11 provided on the room floor 15 of an automobile. <P>SOLUTION: The speaker body 18 includes a speaker unit 21, a cylindrical member 23, surrounding the speaker unit 21 from the radial outside to support the speaker unit 21, and a mounting part 29, attached to the outer periphery of the cylindrical member 23. The mounting part 29 is provided with an air bag 30 that expands/shrinks in radial and cross directions, while air is injected and exhausted through an inlet 31. The air bag 30 expands outward in the radial direction during air injection, whereby the outer periphery is press-fitted to a circumferential wall 12 of the housing space 11. Thereafter, the bag is restricted in radial expansion and expands in the cross direction so that the amount of expansion absorbs the difference of diameter of the spare tire housing space 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a loudspeaker disposed using a spare tire storage space of an automobile.

  Patent Document 1 discloses focusing on a spare tire in a spare tire storage space on the floor surface of a trunk room of an automobile, and disclosing that a speaker unit is inserted and disposed in the wheel recess of the spare tire together with the speaker box (FIG. 4 of Patent Document 1). 6 and 8).

  FIG. 5 is a configuration diagram of a conventional speaker 60 that is deployed using the spare tire storage space 11. In FIG. 5, the same elements as those of FIG. 1 relating to the speaker 10 of one embodiment of the present invention are designated by the same reference numerals as those of the speaker 10, their descriptions are omitted, and the main points are described. .

  The mounting bracket 61 is disposed so as to surround the speaker unit 21, and the front end frame portion 20 of the speaker unit 21 has a circumferential direction with its outer peripheral side edge overlapped with the inner peripheral side edge of the mounting bracket 61. Are fixed to the inner peripheral edge of the mounting bracket 61 by screws 62. The mounting bracket 61 is fixed to the portion of the floor surface 15 near the spare tire storage space 11 by bolts (not shown) at the outer peripheral side edge thereof. The packing 63 is interposed between the outer peripheral side edge of the mounting bracket 61 and the floor surface 15 and holds the space therebetween. As a result, the spare tire storage space 11 also serves as a speaker box.

In another method of fastening the speaker in the spare tire storage space 11, the tire holding boss 14 may have a screw hole along its center line, and the speaker box may be bolted using the screw hole. In some cases, the tire holding boss 14 can be fixed.
Japanese Unexamined Patent Publication No. 7-137581

  In the speaker mounting method described in FIG. 4 and FIG. 8 of Patent Document 1, the bolt is passed through the center of the speaker box, but when the speaker unit is arranged at the center of the speaker box, It is necessary to form a bolt insertion hole in the center of the speaker unit. Otherwise, as shown in FIG. 7 of Patent Document 1, it is necessary to reduce the diameter of the speaker unit and dispose the speaker unit at the center of the speaker unit, which is inconvenient for low-pitched sound reproduction.

  In the speaker 60 of FIG. 5, since the dimensions of the spare tire storage space 11 are different for each automobile manufacturer and vehicle type, it is necessary to prepare the mounting bracket 61 for each automobile manufacturer and vehicle type. In addition, when the speaker is fixed using the screw hole of the tire holding boss 14 shown in FIG. 5, there is an automobile in which the tire holding boss 14 does not have a screw hole. A speaker could not be attached to the storage space 11.

  The objective of this invention is providing the speaker which can be attached irrespective of the difference in the diameter dimension of storage space.

  According to the present invention, a bag body that expands and contracts in the radial direction and the front-rear direction by injecting and discharging air is used. The speaker unit, the frame portion, and the bag are concentrically arranged and assembled in that order from the inside to the outside. When this assembly is mounted on the front end of the peripheral wall of the speaker storage space such as the speaker storage space, the bag body is filled with air and inflated in the radial direction, and the outer periphery of the bag body is crimped to the peripheral wall of the speaker storage space. . There are various diameters of the peripheral wall of the speaker storage space, but the bag body is adjusted by the amount of expansion in the front-rear direction by suppressing the radial expansion from the peripheral wall of the speaker storage space. It fits the diameter of and becomes a wearing state.

The speaker of the present invention includes the following elements.
Speaker unit,
A frame portion that is disposed on the outer peripheral side of the speaker unit and supports the speaker unit, and is fixed to the frame portion so as to surround the frame portion. The bag body.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the speaker which can be attached irrespective of the difference in the diameter dimension of storage space.

  FIG. 1 is a structural diagram of the speaker 10. The speaker 10 includes a spare tire storage space 11 and a speaker body 18 that is detachably attached to an opening of the spare tire storage space 11. The spare tire storage space 11 serves as a space in the speaker box of the speaker 10. The speaker body 18 includes a speaker unit 21 and an attachment structure that is assembled around the speaker unit 21 and attaches the speaker unit 21 to the spare tire storage space 11. The mounting structure includes a cylindrical member 23, a contact member 24, and a mounting portion 29 having a predetermined thickness.

  The spare tire storage space 11 opens upward, is provided at a predetermined portion of the floor 15 at the rear of the automobile compartment, and has a peripheral wall 12 that falls from the floor 15 and a bottom wall 13 that extends to the bottom of the peripheral wall 12. And have. The peripheral wall 12 is not a cylindrical side surface, but is formed on a conical side surface whose diameter gradually increases as it advances toward the opening side on the center line of the spare tire storage space 11. The tire holding boss 14 protrudes from the center of the bottom wall 13, and when the spare tire is stored in the spare tire storage space 11 instead of the speaker body 18, the spare tire is fitted and fixed in the predetermined recess. It is supposed to be.

  The speaker unit 21 includes a cone-shaped diaphragm 19, a front end frame portion 20 coupled to the front end peripheral edge of the diaphragm 19 on the inner peripheral side via an edge, and a voice coil coupled to the lower end of the diaphragm 19. Are provided, and a field forming portion 36 that forms a predetermined magnetic flux in a range including the coil bobbin 35 is provided.

  The inner peripheral side edge portion of the abutting member 24 and the inwardly extending portion of the cylindrical member 23 sandwich the outer peripheral edge portion of the front end frame portion 20 from the front and rear thereof. The bolts 25 are inserted through the insertion holes of the overlapping portions of the abutting member 24, the front end frame portion 20 and the cylindrical member 23 in order from the top to the bottom at a plurality of locations in the circumferential direction of the front end frame portion 20. 26 is screwed and cooperates with the nut 26 to fix the abutting member 24, the front end frame portion 20 and the cylindrical member 23 to each other. The field forming portion 36 of the speaker unit 21 is a coupling member (not shown) that is relatively displaceable with respect to the coil bobbin 35 while forming a gap with the coil bobbin 35 in the center line direction of the speaker unit 21. It is being fixed to the cylindrical member 23 via.

  The mounting portion 29 includes an air bag 30, an air inlet 31, and a plurality of anti-slip rubbers 32. The air bag 30 is made of a flexible material such as polyvinyl chloride, has a floating ring shape, that is, an annular shape, and has an inner peripheral portion fixed to the outer peripheral surface of the cylindrical member 23. The air bag 30 may be made of an elastic material instead of the flexible material. In this case, the air bag 30 is deformed by elastic deformation of the elastic material when the air is filled.

  The air inlet 31 has substantially the same structure as a check valve for a bicycle tire tube, and the air inlet 30 is injected with air and the air is discharged from the air bag 30 through the air inlet 31. Done through. When the user injects air into the air bag 30, the user connects the nozzle of the air pump to the air inlet 31, then sends air from the air pump and enters the air bag 30 through the air inlet 31. inject. When the air is discharged from the air bag 30, the function of the check valve is released by turning a ring portion (not shown) in the air inlet 31 in the same manner as when air is extracted from the bicycle tire.

  FIG. 2 is a front view of the speaker body 18 when the air bag 30 is inflated and contracted. 2A and 2B show a contracted state and an expanded state of the air bag 30. FIG. A plurality of anti-slip rubbers 32 are arranged in a plurality of rows (in FIG. 1) in the circumferential direction on the outer circumferential side surface of the air bag 30 at equal angular intervals in the circumferential direction (FIG. 2) and in the width direction of the outer circumferential side surface (3 rows) is fixed to the outer peripheral side surface. The air bag 30 contracts in the radial direction and the front-rear direction of the speaker unit 21 when the air is discharged, and expands in the radial direction and the front-rear direction of the speaker unit 21 when the air is full. The circumferential adjoining of the non-slip rubber 32 approaches each other when the air bag 30 contracts (FIG. 2A), and separates from each other when the air bag 30 expands (FIG. 2B).

  As described above, the spare tire storage space 11 is formed not on the cylindrical side surface but on the conical side surface that gradually increases in diameter as it approaches the opening side. A reaction force against the pressing force from the bag 30 is exerted on the air bag 30 in a direction in which the air bag 30 is pushed toward the opening side of the spare tire storage space 11, which is caused by the separation of the air bag 30 from the spare tire storage space 11. Cause. The anti-slip rubber 32 is provided as a countermeasure against this, and generates a predetermined frictional force with the peripheral wall 12 to prevent the air bag 30 from being detached from the spare tire storage space 11.

  As air is injected into the air bag 30, the air bag 30 gradually expands outward in the radial direction and in the front-rear direction. The air bag 30 comes into contact with the peripheral wall 12 at the outer peripheral surface thereof in the radial direction, presses the peripheral wall 12, and comes into close contact with the peripheral wall 12. After close contact, the air bag 30 is restricted from expanding outward in the radial direction, and the restriction is directed to expansion in the front-rear direction.

  In this way, the air bag 30 absorbs the dimensional difference of the peripheral wall 12 for each manufacturer and vehicle type by the change in the amount of expansion in the front-rear direction (or deformation during expansion), and is crimped to the peripheral wall 12 regardless of the dimensional difference. The speaker body 18 is mounted near the opening of the spare tire storage space 11. In addition, the air bag 30 is closely attached to the peripheral wall 12, and an additional sealing material is unnecessary, and the spare tire storage space 11 acts as a speaker box space, and the speaker 10 can omit a special speaker box. .

  In the speaker 10, since it is not necessary to form a bolt insertion hole at the center of the speaker 10, the speaker unit 21 can be arranged at the center, and a large-diameter speaker such as a woofer can be employed.

  The speaker 10 emits sound toward the ceiling of the passenger compartment. If black is adopted as the color of the air bag 30, the appearance of the speaker body 18 is similar to a spare tire.

  FIG. 3 shows the shape of the air bag 30 that prevents the air bag 30 from being detached from the expanded spare tire storage space 11. 3A shows the shape of the outer peripheral portion of the air bag 30, and FIG. 3B shows the state when the outer peripheral side surface of the air bag 30 is crimped to the peripheral wall 12.

  The air bag 30 in FIG. 3 is defined in a shape that increases in diameter as it advances from the rear end to the front end when the air is filled. Therefore, the shape of the outer peripheral side surface of the air bag 30 at the time of air filling becomes a taper corresponding to the shape of the conical side surface of the peripheral wall 12, and the outer peripheral side surface of the air bag 30 is crimped to the surface of the peripheral wall 12. Compared with the case where the air bag 30 inflates on the cylindrical side surface, an increase in the reaction force from the peripheral wall 12 in the vicinity of the rear end portion of the outer peripheral surface is suppressed, and the opening-side pushing force from the peripheral wall 12 to the air bag 30 correspondingly. Can be reduced. Thereby, the separation of the air bag 30 from the expanded spare tire storage space 11 can be appropriately prevented.

  FIG. 4 shows another shape of the air bag 30 that prevents the air bag 30 from being detached from the expanded spare tire storage space 11. FIG. 4A shows the shape of the outer peripheral portion of the air bag 30, and FIG. 4B shows the mounting state of the air bag 30 on the peripheral wall 12.

  In the air bag 30 of FIG. 4, the outer peripheral side surface as a whole has a tapered surface shape whose diameter increases from the rear end toward the front end, as in the air bag 30 of FIG. 3. Although the dimensions are set, there are differences in the details due to protrusions and dents. The outer peripheral side surface of the air bag 30 in FIG. 4 is a front projecting portion 45, an expansion regulating member 46, and a rear projecting portion 47 in order from the front end toward the rear end. The expansion regulating member 46 is fixed to the part of the outer circumferential side surface of the air bag 30 that is slightly deviated from the front-rear direction intermediate point to the rear end side over the entire circumference of the air bag 30. 45 protrudes outward in the radial direction larger than the rear protruding portion 47.

  The expansion regulating member 46 has rigidity higher than that of the air bag 30, and restricts expansion of the fixing portion in the air bag 30 to the outside in the radial direction when the air bag 30 is filled with air. The front protruding portion 45 has a shape protruding diagonally forward from the expansion regulating member 46 radially outward. The rear side protruding portion 47 has a shape that protrudes from the expansion regulating member 46 radially outward substantially straight or slightly obliquely rearward. With the floor 15 as a reference surface, the absolute value of the protrusion angle of the front protrusion 45 with respect to the reference surface is larger than the absolute value of the protrusion angle of the rear protrusion 47 with respect to the reference surface.

  As air is injected into the air bag 30 in FIG. 4, the front protruding portion 45 and the rear protruding portion 47 expand radially outward from the portion of the expansion regulating member 46 and abut against the peripheral wall 12 at the tip. . As the air is further injected into the air bag 30, the opening angle of the front protruding portion 45 and the rear protruding portion 47 increases appropriately, and then the expansion of the air bag 30 radially outwards stops. The bag 30 expands only in the front-rear direction, absorbs the difference in diameter of the spare tire storage space 11, and the speaker body 18 is attached to the peripheral wall 12.

  Further, in the mounted state, the front protruding portion 45 is in close contact with the surface of the peripheral wall 12 so as to push the surface of the peripheral wall 12 obliquely forward, whereby the front protruding portion 45 is inclined rearward with a sufficient size from the peripheral wall 12. Can receive the reaction force. On the other hand, the rear projecting portion 47 abuts the surface of the peripheral wall 12 so as to push the surface of the peripheral wall 12 parallel to the floor surface 15 or slightly obliquely rearward, so that the diagonally forward reaction force from the peripheral wall 12 is small. Thus, the front separation of the air bag 30 from the peripheral wall 12 is prevented.

  The relationship between the speaker of the present invention (hereinafter referred to as “the present speaker”) and the speaker 10 of the embodiment will be described.

  The speaker 10 is an example of this speaker. The speaker storage space where this speaker is provided is not limited to the spare tire storage space 11. It may be a speaker storage space formed in the interior and exterior walls, floors, and road surfaces of houses and buildings. This speaker includes a frame portion, a speaker unit, and a bag. Both the frame portion and the bag are typically formed in an annular shape.

  The speaker unit is disposed on the inner peripheral side of the frame portion and supported by the frame portion. The bag body is fixed to the frame portion so as to surround the frame portion, and can be expanded and contracted in the radial direction and the front-rear direction by injecting and discharging air.

  The speaker frame, the speaker unit, and the bag body correspond to the cylindrical member 23, the speaker unit 21, and the air bag 30 of the speaker 10. A flexible material is used for the material of the bag body of the speaker. If the bag body of the present speaker has elasticity, the deformation force is increased, which is even better. The elasticity of the bag body of this speaker is not uniform in all parts, and there may be a part with high elasticity and a part with low elasticity. The portion that is particularly desired to be inflated when the bag is filled with air can also be improved in elasticity.

  The bag body expands outward in the radial direction along with the air injection into the bag body, presses the periphery of the speaker storage space, and restricts expansion outward in the radial direction. The subsequent expansion accompanying the air injection into the bag body is an expansion in the front-rear direction. In this way, this speaker is crimped to the outer peripheral surface of the speaker housing space while the bag body absorbs the difference in diameter of the speaker housing space by the expansion amount in the front-rear direction with respect to the speaker housing space of various diameters. Is done. Thus, smooth mounting is possible regardless of the diameter of the speaker storage space. In addition, since the bag also serves as a seal between the speaker and the periphery of the speaker storage space, this speaker does not require the addition of seal parts and maintains the sealing at the mounting portion, and the speaker storage space is used as the speaker box space. can do.

  Preferably, in the present speaker, the bag body has a non-slip portion on the outer peripheral side surface thereof. A specific example of the anti-slip portion is an anti-slip rubber 32 (FIGS. 1 and 2). The anti-slip portion is particularly advantageous in preventing separation of the present speaker from the speaker storage space when the vertical cross-sectional contour of the peripheral portion of the speaker storage space extends in a tapered shape toward the opening side.

  Preferably, in the present speaker, the outer peripheral side surface of the bag body is sized such that the portion closer to the front end when the bag body is filled with air expands more outward in the radial direction. A specific example is the speaker 10 including the air bag 30 shown in FIGS.

  Preferably, in the present speaker, the outer peripheral side surface of the bag body has a shape in which the front end portion projects obliquely forward on the outer side in the radial direction when the bag body is filled with air. A specific example is the front protruding portion 45 described in FIG.

  This specification discloses various ranges and levels of the invention. The invention is not limited to the various technical scopes and specific levels of the apparatuses and methods described in the present specification, but within the scope of obviousness of those skilled in the art, the actions and effects independent of the apparatuses and methods. Extracting one or more elements to be played, one or more elements changed within a self-evident range, and combinations of one or more elements between devices and methods Including things.

It is structural drawing of a speaker. It is a front view of the speaker main body at the time of expansion and contraction of an air bag. It is a figure which shows the shape of the air bag which prevents the detachment | leave of the air bag from the expanded spare tire storage space. It is a figure which shows another shape of the air bag which prevents the detachment | leave of the air bag from the expanded spare tire storage space. It is a block diagram of the conventional speaker arrange | positioned using a spare tire storage space.

Explanation of symbols

10: Speaker, 11: Spare tire, 12: Perimeter wall, 13: Bottom wall, 18: Speaker body, 21: Speaker unit, 23: Cylindrical member (frame part), 29: Mounting part, 30: Air bag (bag body) 32: Anti-slip rubber (anti-slip part), 45: front protruding part, 47: rear protruding part.

Claims (4)

Speaker unit,
A frame portion that is disposed on the outer peripheral side of the speaker unit and supports the speaker unit, and is fixed to the frame portion so as to surround the frame portion. Bag body,
A speaker comprising:   The speaker according to claim 1, wherein the bag body has a non-slip portion on an outer peripheral side surface thereof.   3. The speaker according to claim 1, wherein the outer peripheral side surface of the bag body is dimensioned so that the portion closer to the front end when the bag body is filled with air is more greatly expanded outward in the radial direction.   The speaker according to claim 1 or 2, wherein the outer peripheral side surface of the bag body has a shape in which a front end portion protrudes obliquely forward outward in the radial direction when the bag body is filled with air.

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