CN1711798A - Wide directivity speaker system and cover mounting structure of flat surface direct mount device - Google Patents
Wide directivity speaker system and cover mounting structure of flat surface direct mount device Download PDFInfo
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- CN1711798A CN1711798A CN200380103422.1A CN200380103422A CN1711798A CN 1711798 A CN1711798 A CN 1711798A CN 200380103422 A CN200380103422 A CN 200380103422A CN 1711798 A CN1711798 A CN 1711798A
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Abstract
A wide directivity speaker system (1) is provided with a conical speaker unit (2) and a throttle member (10A). A central hole (11) is formed in the central portion of the orifice member (10A), and a peripheral hole (12) is formed outside the central hole. An annular shielding part (19) is formed on the throttle member (10A) at the radial direction outer side of the central hole (11) and at the radial direction inner side of the peripheral hole (12). The radially outer end of the shielding part (19) is located at a position approximately in the middle between the radially outer end of the central hole (11) and the radially outer end of the peripheral hole (12), or located further radially outward than the middle position.
Description
Technical field
The application's invention relates to the wide directionality speaker system that can make directivity wideer.
Again, the application's another invention relates to the structure that mounting cover is used on the appliance body that directly is installed on planar portions, particularly relates to the cover attaching construction that can prevent to cover the plannar direct-mounted implements that comes off.
Background technology
The trial (reference example such as Japanese Utility Model patent application publication number are put down into the 1st page in 4-59696 communique, Fig. 1) of the directivity of expansion speaker system is always just arranged always.Figure 26 is the sectional arrangement drawing of existing wide directionality speaker system 201.
In this speaker system 201, be provided with the panel 210 that possesses peristome 211 in the place ahead of oscillating plate.Peristome 211 forms concentric circles with loudspeaker unit 202.The place ahead of peristome 211 disposes the diffuser (diffuser) 204 of droplet-like.
The area of the peristome 211 of panel 210 is littler than the area of the oscillating plate of loudspeaker unit 202.That is to say, be to utilize panel 210 to shrink aperture area on oscillating plate apparent of loudspeaker units 202.Such throttle ele-ment (throttle member) (panel 210 with peristome 211) is set, compares, can further expand directivity with the situation that only disposes diffuser 204 in oscillating plate the place ahead.
Also have, though also there is before oscillating plate configuration have the panel of central opening portion, whole front panel forms the speaker system (reference example such as Japanese Unexamined Patent Publication No are put down into the 2nd page in 8-331684 communique, Fig. 1) of a plurality of circular holes everywhere, but owing on whole front panel, form a plurality of circular holes everywhere, this panel restriction effect in fact is poor, the directivity that can not fully be expanded.
Figure 26 represents to use the speaker system 201 as the panel 210 of throttle ele-ment, even but the abundant propagation direction of sometimes such structure.Particularly, sometimes can not obtain desirable directivity at midrange and high range.
In the speaker system 210 of structure shown in Figure 26,, also consider for example the peristome 211 of panel 210 to be made littler direct peristome for little amplitude changes the directivity that structure just can better be expanded midrange and high range.If but the area of peristome 211 is too small, in other words, if the aperture area excess shrinkage on oscillating plate apparent it is contemplated that then the sound equipment energy that loudspeaker unit 202 takes place can not be fully to external radiation.Thereby the area that dwindles the peristome 211 of panel 210 is limited with propagation direction.
On the other hand, exist in the situation of mounting cover on the direct appliance body of installing of planar portions.For example have in directly being installed on the ceiling embedded type speaker system of ceiling, at the opening of ceiling wall the main body of speaker system is installed, (from following) mounting cover makes it cover the situation of the front surface of this speaker system main body from the front.
Figure 27 represents existing cover attaching construction.Form circular open on the ceiling wall 370, have the speaker system 310 of loudspeaker unit 311 in this opening embedding.This speaker system main body 310 mainly is made of loudspeaker unit 311 and installation component 315.Central portion at installation component 315 forms circular hole (not shown), and the oscillating plate of the loudspeaker unit of installing on the rear side of installation component 315 311 exposes from this circular hole.The installation component 315 that side is overleaf carried under the state of loudspeaker unit 311 is fixed in ceiling wall 370, with this with the state of direct installation fixing speaker system main body 310 on ceiling.
Be covered with the front surface of this loud speaker main body 310, saturating sound lid 340 is installed on installation component 315.
Many places at the periphery of installation component 315 form main body side fitting portion 320.Again at lid 340 periphery, form in the place corresponding and to cover side fitting portion 350 with these main body side fitting portions 320.
Should cover 340 when being installed on speaker system main body 310, and at first, make main body side fitting portion 320 and lid side fitting portion 350, and make and cover 340 and embed speaker system main bodys 310, and then make and cover 340 rotations near configuration.So lid side fitting portion 350 is contained on the main body side fitting portion 320, both are chimeric for main body side fitting portion 320 and lid side fitting portion 350.
Figure 28 is the interim schematic diagram that main body side fitting portion 320 and lid side fitting portion 350 carry out chimeric state.(a) being the state of chimeric beginning, (b) is the chimeric state before of finishing, and (c) is the chimeric state of finishing.During from (b) status transition to (c) state, the protuberance 353 of lid side fitting portion 350 is crossed the protuberance 327 of main body side fitting portion 320.In case arrived chimeric completion status ((c) state), only otherwise apply king-sized revolving force to covering 340, main body side fitting portion 320 just can not be removed with 350 both chimeric of lid side fitting portion.Therefore, the ceiling embedded type speaker system can not covered 340 situations about coming off from loud speaker main body 310 under common user mode.
But the operator will cover 340 when being embedded in speaker system main body 310, might place with the state of Figure 28 (b).This is because for example under the such situation of end in contact ceiling face on the lid 340, it is also needed covering the 340 big revolving forces that apply in a way to (b) status transition from (a) state, even and the situation that also has the lid pine not open at (b) state.In a word, although main body side fitting portion 320 is (b) such states with lid side fitting portion 350 both fitting portions, also there is the operator just to think by mistake and chimericly finishes, with this state (b) end operation.
Remain under the situation of placing under such state ((b) state), lid 340 might come off from speaker system main body 310.Particularly in case drive loudspeaker unit 311, speaker system main body 310 and lid 340 grades are in vibrational state, might cover 340 and slowly rotate to removing chimeric direction with respect to speaker system main body 310, finally covering 340 might come off from speaker system main body 310.
Summary of the invention
The objective of the invention is, the wide directionality speaker system that can further expand directivity is provided.
In order to solve above-mentioned existing problems, wide directionality speaker system of the present invention possesses pyramid type loudspeaker unit and throttle ele-ment (throttle member); This pyramid type loudspeaker unit has oscillating plate, and this throttle ele-ment covers the place ahead of this oscillating plate; Form medium pore and periphery hole on this throttle ele-ment; This medium pore is positioned at the place ahead of the central portion of this oscillating plate; This periphery hole is positioned at this medium pore to the radial direction outside; The area summation of this medium pore and this periphery hole is littler than the area of this oscillating plate; In this throttle ele-ment, to the radial direction outside, and be this periphery hole at this medium pore to the inboard place of radial direction, form the shielding portion of ring-type; The outer end of the radial direction of this shielding portion is positioned at the roughly position intermediate of the radial direction outer end of the radial direction outer end of this medium pore and this periphery hole, or than this centre position more by the position in the radial direction outside.
Adopt such structure, sound wave is by medium pore and periphery hole.The directivity of wide directionality speaker system is as producing from the sound wave of medium pore with from the result of interference of the sound wave of periphery hole.If can distinguish extraction separately, be used to form wideer directivity, and be used to form narrow directivity from the sound wave of periphery hole from the sound wave of medium pore from the sound wave of medium pore with from the sound wave of periphery hole.Produce phase difference from the sound wave of medium pore with from the sound wave of periphery hole, particularly both mutual interference are remarkable on frontal.Consequently, reduce relatively at the frontal sound pressure level.That is to say, the addition degree variation of the sound pressure level of frontal, consequently the directivity of wide directionality speaker system enlarges because of frequency.
In above-mentioned wide directionality speaker system, the radial direction outer end of this periphery hole and is positioned near the periphery of this oscillating plate on radial direction.If oscillating plate has edge part at the conus portion periphery, then as long as the radial direction outer end of periphery hole near the periphery that is positioned at conus portion on the radial direction, or is positioned at edge part and gets final product.If oscillating plate is not possess the nothing of edge part along the type oscillating plate, then as long as the radial direction outer end of periphery hole is positioned near the periphery of conus portion on the radial direction.Like this, be positioned at the outside of radial direction by the position that makes periphery hole as far as possible, the directivity that makes sound wave from periphery hole form is narrower, and also becomes big with phase difference from the sound wave of medium pore.Consequently, enlarge the directivity of wide directionality speaker system more.
Again, in above-mentioned wide directionality speaker system, can be to surround this medium pore fully to form this periphery hole and get final product, it is a plurality of also can be that this periphery hole has, and these a plurality of periphery holes surround this medium pore fully to be disperseed to form.Adopt such structure, be expected on the direction of whole week directivity and evenly expand.
Again, in above-mentioned wide directionality speaker system, preferably this periphery hole surrounds this medium pore formation, and the central shaft that forms with this pyramid type loudspeaker unit is the angular range more than 180 ° at center.Again, preferably this periphery hole has a plurality ofly, and these a plurality of periphery holes surround this medium pore and form, and is that the angular range more than 180 ° at center disperses to form at the central shaft with this pyramid type loudspeaker unit.
Again, can in above-mentioned wide directionality speaker system, be in the angular range more than 45 ° at center at central shaft with this pyramid type loudspeaker unit, do not form this periphery hole.
In above-mentioned wide directionality speaker system, can this periphery hole be the slit-shaped apertures of on radial direction, extending also again.Because the bearing of trend of periphery hole is exactly a radial direction, even form a plurality of periphery holes, the decline of throttle ele-ment rigidity is also few.Therefore, the gross area of periphery hole can more freely be set, and has the effect that can adjust from the level of the sound wave of periphery hole.Otherwise so just can solve from the problem and the sound wave level of the level deficiency of the sound wave of periphery hole too highly, be in the mastery status, can not obtain the problem of desirable directivity from the directivity of the sound wave of periphery hole.
In above-mentioned wide directionality speaker system, also can make the slit width of this periphery hole littler than the degree of depth of this periphery hole again.In very high frequency, if make the width of slit littler than the degree of depth in hole, then periphery hole is as the impedance of sound wave, is that the level of sound wave can be done to such an extent that recently the level from the sound wave of medium pore is little many from periphery hole therefore.Thereby, can regard just output as from the sound wave level of medium pore at very high frequency field, can relax the confusion of directivity.
Again, in above-mentioned wide directionality speaker system, the configuration of this periphery hole also can be with respect to the asymmetric form of the central shaft of this pyramid type loudspeaker unit.If the configuration that makes periphery hole is with respect to described central shaft symmetry, then on the frequency characteristic of the sound pressure level in wide directionality speaker system front, rapid inclination takes place sometimes.Can alleviate the generation of this rapid inclination by the inclination of adopting asymmetric form.
In above-mentioned wide directionality speaker system, also diffuser (diffuser) can be set in the place ahead of this medium pore again.Even by medium pore is done little can propagation direction, but degree of expansion also is limited, and is expected to further expand directivity at extra high frequency band by diffuser is set.
Again, another purpose of the present invention provides the cover attaching construction that can as far as possible prevent to cover the plannar direct-mounted implements that comes off.
In order to solve above-mentioned problem, the cover attaching construction of plannar direct-mounted implements of the present invention, possesses the appliance body of directly installing in planar portions, and be installed on lid on this appliance body with being covered with this appliance body front surface, the circular periphery that is roughly at this appliance body is provided with the main body side fitting portion, on the position corresponding of this lid, be provided with and cover the side fitting portion with this main body side fitting portion, this main body side fitting portion has: extend exist back to face in a circumferential direction, the cardinal extremity that has direction in this back to the extension of face, than the 1st protuberance of more rearward giving prominence to face after this, and the front end that has direction in this back to the extension of face, than the 2nd protuberance of more rearward giving prominence to face after this, this lid side fitting portion has the forward surface of extending existence in a circumferential direction, and the front end that has direction in the extension of this forward surface, 3rd protuberance more outstanding than this forward surface, this lid is being installed, when making it cover this appliance body from the front, this main body side fitting portion is set on this appliance body, make the forward surface of this lid side fitting portion can be positioned at back than this main body side fitting portion, and this lid side fitting portion is arranged at this and cover to face rear more.
Adopt such structure, lid side fitting portion is installed on the main body side fitting portion, and the state that the 3rd protuberance is crossed the 1st protuberance and the 2nd protuberance is exactly the original chimeric state of finishing.But supposition is crossed the 1st protuberance at the 3rd protuberance, and do not cross under the state of the 2nd protuberance, the fitting operation that covers on appliance body finishes, in order to make lid break away from appliance body, the 3rd protuberance must reverse returning, cross the 1st protuberance, must be applied to revolving force bigger on a certain degree to lid for this reason.Even therefore the 3rd protuberance is crossed the 1st protuberance, and does not cross under the state of the 2nd protuberance, just finish to cover the fitting operation on appliance body, lid can not come off from appliance body simply.
Again, in order to solve above-mentioned problem, the cover attaching construction of another plannar direct-mounted implements of the present patent application, possess: at the direct appliance body of installing of planar portions, and be installed on lid on this appliance body with being covered with this appliance body front surface, the circular periphery that is roughly at this appliance body is provided with the main body side fitting portion, on the position corresponding of this lid, be provided with and cover the side fitting portion with this main body side fitting portion, this lid side fitting portion has: extend the forward surface that exists in a circumferential direction, the front end that has direction in the extension of this forward surface, 1st protuberance more outstanding than this forward surface, and the cardinal extremity that has direction in the extension of this forward surface, 2nd protuberance more outstanding than this forward surface, this main body side fitting portion has back to face that extension in a circumferential direction exists, and in this back the cardinal extremity to the bearing of trend of face, than the 3rd protuberance of more rearward giving prominence to face after this, this lid is being installed, when making it cover this appliance body from the front, this main body side fitting portion is set on this appliance body, what make that the forward surface of this lid side fitting portion is positioned at this main body side fitting portion is back to face rear more, and this lid side fitting portion is arranged at this and covers.
Adopt such structure, lid side fitting portion is installed on the main body side fitting portion, and the state that the 1st protuberance and the 2nd protuberance are crossed the 3rd protuberance is exactly the original chimeric state of finishing.But supposition is crossed the 3rd protuberance at the 1st protuberance, and the 2nd protuberance do not cross under the state of the 3rd protuberance, the fitting operation that covers on appliance body finishes, in order to make lid break away from appliance body, the 1st protuberance must reverse returning, cross the 3rd protuberance, must be applied to the revolving force of the size of a certain degree for this reason lid.Therefore even the 1st protuberance is crossed the 3rd protuberance, and the 2nd protuberance do not cross under the state of the 3rd protuberance, just finishes to cover the fitting operation on appliance body, and lid can not come off from appliance body simply.
In the cover attaching construction of described plannar direct-mounted implements, also a plurality of these main body fitting portions can be arranged at this appliance body, a plurality of lid side fitting portions are arranged at this and cover, and these a plurality of main body side fitting portions are arranged on the mutual corresponding position with these a plurality of lid side fitting portions.
Adopt such structure, a plurality of chimeric places are arranged, lid is not easy to come off from main body more.
Again, in the cover attaching construction of described plannar direct-mounted implements, also can be part or all in the 1st protuberance, the 2nd protuberance and the 3rd protuberance, direction deflection forwards, backwards.
Adopt such structure, when carrying out chimeric operation, when a certain protuberance will be crossed other protuberances, needn't apply bigger revolving force, that can seek to operate carries out smoothly.
Again, in the cover attaching construction of described plannar direct-mounted implements, can this plannar direct-mounted implements be the ceiling embedded type speaker system also, this appliance body has loudspeaker unit, and this lid is also can be the lid that sees through sound.
The vibration that the acceptant loudspeaker unit of ceiling embedded type speaker system comes particularly is hopeful to realize covering the stable of installment state on appliance body (speaker system main body), and therefore such structure is beneficial especially.
Above-mentioned purpose of the present invention, other purposes, feature and favourable part can be clearer after the reference accompanying drawing is elaborated to following best example.
Description of drawings
Fig. 1 is the sectional arrangement drawing that is installed on the wide directionality speaker system on the ceiling wall.
Fig. 2 is the front view of wide directionality speaker system.
Fig. 3 be installed on wide directionality speaker system on the ceiling wall from the below stereogram during oblique the observation.
Fig. 4 is the front view that omits the throttle ele-ment of support sector.
Fig. 5 is the sectional arrangement drawing of wide directionality speaker system.
Fig. 6 is used for utilizing (a)～(c) to schematically illustrate the effect of wide directionality speaker system.
Fig. 7 is illustrated in the directional pattern of measuring on each frequency, (a) is the directional pattern at the 2kHz frequency measurement, (b) is the directional pattern at the 4kHz frequency measurement, (c) is the directional pattern at the 8kHz frequency measurement.
Fig. 8 is the frequency characteristic figure at the deflection of 1～10kHz frequency measurement.
Fig. 9 measures the sound pressure level frequency characteristic figure on the frontal to two kinds of speaker systems that the applicant holds.
Figure 10 is the front view of throttle ele-ment.
Figure 11 is throttle ele-ment figure, (a) is front view, (b) is sectional arrangement drawing.
Figure 12 is the front view of throttle ele-ment.
Figure 13 is the front view of throttle ele-ment.
Figure 14 is the sectional arrangement drawing of wide directionality speaker system.
Figure 15 is the sectional arrangement drawing that is installed on the ceiling embedded type speaker system on the ceiling wall.
Figure 16 is a stereogram of observing the speaker system main body from rear side.
Figure 17 is the back view of speaker system main body.
Figure 18 is a stereogram of observing lid from rear side.
Figure 19 is the back view of lid.
Figure 20 be Figure 19 the XX-XX line to view.
Figure 21 is fixed in the speaker system main body on the ceiling wall and the side view of the lid that will be mounted thereon.
Figure 22 is under speaker system main body and the chimeric state of lid, observes main body side fitting portion and lid side fitting portion and the stereogram nearby time the thereof from the back side.
Figure 23 be utilize (a)～(d) represent stage by stage main body side fitting portion and lid side fitting portion chimeric mutually carry out state stereogram.
Figure 24 be utilize (a)～(d) represent stage by stage main body side fitting portion and lid side fitting portion chimeric mutually carry out the state side view.
Figure 25 is a stereogram of observing speaker system main body and lid from rear side.
Figure 26 is the sectional arrangement drawing of existing wide directionality speaker system.
Figure 27 represents existing cover attaching construction, is the side view of speaker system main body and lid.
Figure 28 utilizes (a)～(c) to represent the cover attaching construction of Figure 27 stage by stage, and main body side fitting portion and lid side fitting portion carry out the side view of chimeric state.
Preferred forms
With reference to the accompanying drawings example of the present invention is described.
The 1st example
Below with reference to figure the 1st example of the present patent application is described.At first, with reference to Fig. 1～Fig. 5 the basic structure of the wide directionality speaker system 1 of the present patent application one example is described.
Fig. 1 is the sectional arrangement drawing that is installed on the wide directionality speaker system 1 on the ceiling wall 30, and Fig. 2 is the front elevation of wide directionality speaker system 1, Fig. 3 be installed on wide directionality speaker system on the ceiling wall 30 from the below stereogram during oblique the observation.
Wide directionality speaker system 1 has power type pyramid type loudspeaker unit 2, throttle ele-ment 10A and diffuser 4.
On ceiling wall 30, form circular installing hole 30a.In this installing hole 30a, embed throttle ele-ment 10A, be fixed at ceiling wall 30.By means of this, wide directionality speaker system 1 is installed on ceiling wall 30.Like this, the throttle ele-ment 10A of this example not only has following throttling function, and can work as the installation component that wide directionality speaker system 1 usefulness is installed on ceiling.
Pyramid type loudspeaker unit 2 is installed on the throttle ele-ment 10A from its rear side.Pyramid type loudspeaker unit 2 has oscillating plate 7.Oscillating plate 7 has pyramid type portion 3 and is arranged at its peripheral edge part 5.Symbol 6 expression among the figure be border between pyramid type portion 3 and the edge part 5.The oscillating plate 7 of pyramid type loudspeaker unit 2 utilizes throttle ele-ment 10A to be capped from the place ahead.
Throttle ele-ment 10A goes up and forms medium pore 11 and a plurality of periphery hole 12.Medium pore 11 is positioned at the place ahead of central portion of the oscillating plate 7 of pyramid type loudspeaker unit 2, and periphery hole 12 is positioned at than the position of medium pore 11 by the radial direction outside.That is to say that periphery hole 12 is positioned at the periphery of medium pore 11.The aperture area summation of medium pore 11 and a plurality of periphery hole 12 is littler than the area of oscillating plate 7.That is to say that the aperture area on oscillating plate 7 apparent utilizes throttle ele-ment 10A to dwindle.
In throttle ele-ment 10A, the annulus between medium pore 11 and the periphery hole 12 forms shielding portion 19.Shielding portion 19 forms the structure that can be roughly the path of sound wave be covered.Specifically, do not form any hole on the shielding portion 19, shielding portion 19 does not constitute the path of sound wave.Also have,, do not need as the shielding portion 19 of this example, to form the structure that does not have the hole fully, do not get final product so long as do not form the sound wave path in fact in order to work as shielding portion.Therefore, even form some small holes, as long as can block sound wave in fact.At the arranged outside shielding portion 19 of medium pore 11, be like this in order to strengthen the restriction effect of throttle ele-ment 10A.That is to say,, then can not shrink aperture area on apparent, the directivity of expansion speaker system at medium pore 11 if do not cover the part of sound passage in the outside of medium pore 11.
Also have, the covering member (not shown) that sees through sound that covers from face side can be set throttle ele-ment 10A and diffuser 4.
Fig. 4 is the front view that omits the throttle ele-ment 10A of support sector 13.On the throttle ele-ment 10A, form circular medium pore 11 at central part.When pyramid type loudspeaker unit 2 was installed on this throttle ele-ment 10A, this medium pore 11 formed the shape concentric with pyramid type loudspeaker unit 2.The area of medium pore 11 is more than 20%, below 50% of area of the oscillating plate 7 of pyramid type loudspeaker unit 2 preferably.
Periphery at the medium pore 11 of throttle ele-ment 10A forms 11 periphery holes 12.The shape of periphery hole 12 is the shape of slit of extending on radial direction.The shape of periphery hole 12 adopts shape of slit, and making its bearing of trend consistent with radial direction is in order to reduce the decline of throttle ele-ment 10A rigidity as far as possible.Because bearing of trend is a radial direction, even form a plurality of periphery holes 12, the rigidity of throttle ele-ment 10A descends also few.Therefore the setting of the quantity of periphery hole 12 is relatively freer, and its gross area also can more freely be set.
The periphery hole 12 of 11 slit-shaped is 225 ° the angular range configuration of being roughly at center at the central shaft of pyramid type loudspeaker unit 2, on the other hand, does not form periphery hole 12 in remaining angular range (promptly being roughly 135 ° angular range).Therefore periphery hole 12 is asymmetric with respect to the configuration of this central shaft.
The edge of the circle expression medium pore 11 among Fig. 4 shown in the symbol P1, be the position of the radial direction outer end of medium pore 11.The position of the radial direction inner end of the circle of symbol P2 (supposing to think the circle of line) expression periphery hole 12.And the annulus between circle P1 and the circle P2 is a shielding portion 19.That is to say that the radial direction outer end of medium pore 11 is consistent with the radial direction inner end of shielding portion 19, the radial direction inner end of periphery hole 12 is consistent with the radial direction outer end of shielding portion 19.
Fig. 5 is the sectional arrangement drawing of wide directionality speaker system 1.Lead-out wire shown in the symbol P1 among the figure is represented the position (position of the radial direction inner end of shielding portion 19) of the radial direction outer end of medium pore 11.Lead-out wire shown in the symbol P2 is represented the position (position of the outer end of the radial direction of shielding portion 19) of the radial direction inner end of periphery hole 12.Lead-out wire shown in the symbol P3 is represented the position of outer end of the radial direction of periphery hole 12.
The about 30mm of line P1 decentre axis (chain-dotted line among the figure), the about 45mm of line P2 decentre axis, the about 54mm of line P3 decentre axis.
According to Fig. 5 as can be known, line P2 is positioned at the approximate centerpoint of line P1 and line P3.Like this, preferably the radial direction outer end of shielding portion 19 is positioned at the roughly centre position of the radial direction outer end of the radial direction outer end of medium pore 11 and periphery hole 12, or than its (centre position) position by the radial direction outside.If the radial direction width that is shielding portion 19 is too short, the medium pore 11 that then can not effectively utilize throttle ele-ment 10A produces restriction effect.
Again, according to Fig. 5 as can be known, the position of line P3 is near the periphery of radial direction upper vibrating plate 7.The periphery that makes the outer end of the radial direction of periphery hole 12 be in oscillating plate 7 so nearby is in order to make periphery hole 12 be positioned at the radial direction outside as far as possible.
The degree of depth of periphery hole 12 is represented with D among Fig. 5.The consistency of thickness of this depth D and throttle ele-ment 10A.On the other hand, in Fig. 4, the slit width of periphery hole 12 is represented with W.In periphery hole 12, width W is than depth D little (weak point).So, particularly high frequency band all the other, periphery hole 12 sound waves by the time produce impedance.In wide directionality speaker system 1, the sound wave that oscillating plate 7 produces passes through medium pore 11 to external radiation, pass through periphery hole 12 simultaneously to external radiation, but 12 pairs of sound waves of periphery hole pass through to demonstrate in a way impedance, therefore on the directivity of wide directionality speaker system 1, the sound wave by periphery hole 12 is not to play overriding effect.
Effect to wide directionality speaker system 1 describes below.
Fig. 6 is used for utilizing (a)～(c) to schematically illustrate the effect of the wide directionality speaker system 1 of this example.As mentioned above, in wide directionality speaker system 1, the sound wave that is produced by oscillating plate 7 is radiated outside by medium pore 11, is radiated outside by periphery hole 12 simultaneously.Here, two kinds of holes (medium pore 11 and periphery hole 12) can be regarded respectively independently sound source as.
(a) only schematically show deflection under the situation that medium pore 11 is considered as sound source.Ra represents deflection among the figure.Medium pore 11 is compared with oscillating plate 7, and diameter is enough little, even therefore also have the deflection than broad under the frequency of some height (a certain) degree.
(b) only schematically show deflection under the situation that periphery hole 11 is considered as sound source.Rb represents deflection among the figure.Periphery hole 12 is positioned near the place ahead on border 6 of conus portion 3 on the oscillating plate 7 and edge part 5.Oscillating plate 7 demonstrates the behavior that equals to have only its central portion vibration in the zone of some high level of frequency, if but with periphery hole 12 as imaginary sound source, then have deflection identical when vibrating with the periphery that has only oscillating plate 7 (being the periphery and the edge part 5 of conus portion 3).Therefore deflection is narrow.
(c) the schematic deflection of two sound sources of expression (medium pore 11 and periphery hole 12) is overlapping.Usually has phase difference as the medium pore 11 of sound source with as the periphery hole 12 of sound source.Therefore from the sound wave of medium pore 11 and sound wave generation phase interference from periphery hole 12.Phase interference is remarkable especially at the overlapping angular range of the deflection of two sound sources.Represent deflection from the sound wave of medium pore 11 with Ra among the figure, represent deflection from the sound wave of periphery hole 12 with Rb, the overlapping angular range of deflection is the angular range of Rb.The area of the total area ratio medium pore 11 of periphery hole 12 is little, and therefore the slit width W of periphery hole 12 pass through formation impedance in a way for sound wave less than the depth D of periphery hole 12 as mentioned above.Therefore the sound wave from periphery hole 12 more is in overriding status unlike the sound wave from medium pore 11.At the angular range of Rb because phase interference takes place, can think sound pressure level (with medium pore 11 and periphery hole 12 both as the sound pressure level under the situation of sound source) lower than having only medium pore 11 as the situation of sound source.
On the other hand, in the angular range of Ra, the outside of Rb angular range (angular range of Rc), and low from the level of the sound wave of periphery hole 12, therefore significant phase interference does not take place.Therefore at the Rc angular range, can think sound pressure level (with medium pore 11 and periphery hole 12 both as the sound pressure level under the situation of sound source) with have only medium pore 11 about equally as the situation of sound source.By means of this, to compare with the situation of (a), the addition degree of the sound pressure level of (angular range of Rb) on the frontal is poor, and as consequently, the directivity of the speaker system 1 of wide directionality is expanded.
The directivity of two kinds of speaker system S1, S2 that the applicant has oneself is measured.Speaker system S1 is and the wide directionality speaker system 1 of Fig. 1～shown in Figure 5 and the speaker system of same structure that speaker system S2 is the speaker system of comparison other.The difference of speaker system S1 and speaker system S2 only is to have or not periphery hole.Be that speaker system S2 does not form periphery hole.Other structures are identical with speaker system S1.The directivity measurement result of speaker system S1, S2 is shown in Fig. 7 and Fig. 8.
Fig. 7 is illustrated in the directivity characteristic curve of measuring on each frequency, (a) is the directivity characteristic curve at the 2kHz frequency measurement, (b) is the directivity characteristic curve at the 4kHz frequency measurement, (c) is the directivity characteristic curve at the 8kHz frequency measurement.The directivity characteristic curve that solid line is represented among the figure is the directivity mode of speaker system S1, and the directivity mode that dotted line is represented is the directivity characteristic curve of speaker system S2.Can be understood as, in each frequency, speaker system S1 is wideer than speaker system S2 directivity.
Fig. 8 asks deflection (sound pressure level is than the start point of the both direction of the little 6dB of sound pressure level of frontal) according to the directivity characteristic curve of measuring in 1～10kHz frequency range, the frequency characteristic figure of expressing as frequency characteristic.Among the figure, the characteristic that solid line is represented is the characteristic of speaker system S1, and what dotted line was represented is the characteristic of speaker system S2.In nearly all frequency range of 1～10kHz, the deflection that can be understood as speaker system S1 is bigger than speaker system S2.
As mentioned above, in the wide directionality speaker system 1 of Fig. 1～Fig. 5,11 periphery holes 12 are disposed at 225 ° the angular range of being roughly that central shaft with pyramid type loudspeaker unit 2 is the center, on the other hand, other angular ranges do not form periphery hole 12, so periphery hole forms with respect to the asymmetric configuration of this central shaft.
Adopting such symmetrical arrangements form, is for fear of produce rapid decline in the frequency characteristic of the sound pressure level of frontal.
In wide directionality speaker system S1, interfere mutually by the sound wave of medium pore 11 and the sound wave of periphery hole 12, in the frequency characteristic of the sound pressure level of frontal, also can imagine has the situation about sharply descending of taking place.For such decline is relaxed, periphery hole 12 adopts with respect to the asymmetrical state of central shaft.
That is to say, under the situation of entire circumference (the axial whole angular ranges in center) with the angle same arranged spaced with periphery hole 12 these central shafts, take place sharply to descend owing to interfere, if but stop up periphery hole 12 at certain angular range, adopt symmetrical arrangements, then interfere form complicated more, can think and to avoid in the extreme interference of the sound wave of specific frequency.
Fig. 9 is the result that the frequency characteristic of sound pressure level of the frontal of two kinds of speaker system S3, S4 that the applicant is held is measured.Speaker system S3 has the speaker system of identical structure with Fig. 1～wide directionality speaker system 1 shown in Figure 5.Speaker system S4 is the speaker system with throttle ele-ment 10B shown in Figure 10.Figure 10 is the front view of throttle ele-ment 10B.Speaker system S4 also is the example of the present patent application, but different with speaker system S3, and 16 periphery holes 12 form in first-class angle intervals of whole week.Other structures are identical with speaker system S3.
In Fig. 9, the sound pressure level shown in the solid line is speaker system S3, and the sound pressure level shown in the dotted line is speaker system S4.As known in the figure, in speaker system S4, rapid decline of frequency generation of about 4.5kHz, about 6.1kHz, about 7.2kHz, but these descend elimination or mitigations to some extent under the situation of speaker system S3.
Abovely one example of the wide directionality speaker system of the present patent application is illustrated with reference to Fig. 1～Figure 10.Below other examples of the present invention are described.
In Figure 11, Figure 11 (a) and (b) be respectively front view and the sectional arrangement drawing of throttle ele-ment 10C.In the wide directionality speaker system 1 of Fig. 1, also can use the such throttle ele-ment 10C of Figure 11 to replace throttle ele-ment 10A.On the throttle ele-ment 10C of Figure 11, on the roughly whole week of medium pore 11, surround and form a periphery hole 14.Also have,, utilize 4 support member, 15 supports of extending from the part 10Ca in the outside than the periphery hole 14 part 10Cb more to the inside of throttle ele-ment 10C.Among this throttle ele-ment 10C, the configuration 4 of periphery hole 14 is with respect to the axisymmetric configuration in the center of pyramid type loudspeaker unit 2.
Figure 12 is the front view of throttle ele-ment 10D.In the wide directionality speaker system 1 of Fig. 1, also can adopt the such throttle ele-ment 10D of Figure 12 to replace throttle ele-ment 10A.In the throttle ele-ment 10D of Figure 12, form a periphery hole 16.Periphery hole 16 is to be to surround centre bore 11 on about 270 ° angular range at center to form at the central shaft with pyramid type loudspeaker unit 2.In this throttle ele-ment 10D, the configuration of periphery hole 16 is the central shaft symmetrical arrangements with respect to pyramid type loudspeaker unit 2.
Figure 13 is the front view of throttle ele-ment 10E.In the wide directionality speaker system 1 of Fig. 1, also can use the such throttle ele-ment 10E of Figure 13 to replace throttle ele-ment 10A.On the throttle ele-ment 10E of Figure 13, the roughly whole week that surrounds medium pore 11 disperses to form 16 the slit-shaped periphery holes 17,18 that extend to circumferencial direction.Among this throttle ele-ment 10E, the configuration of periphery hole 17,18 is with respect to the axisymmetric form in the center of pyramid type loudspeaker unit 2.
Figure 14 is the sectional arrangement drawing of wide directionality speaker system 1F.This wide directionality speaker system 1F has pyramid type loudspeaker unit 2, throttle ele-ment 10F and installation component 20.The installing hole 30a that is formed at the circle on the ceiling wall 30 goes up and embeds installation component 20, is fixed in ceiling wall 30.Pyramid type loudspeaker unit 2 is installed at installation component 20 from its rear side, and throttle ele-ment 10F is installed on installation component 20 from its face side.Throttle ele-ment 10F is the member that forms the panel shape of medium pore 11 and periphery hole 12.The throttle ele-ment 10A of Fig. 1 also has the function as installation component.And the throttle ele-ment 10F of Figure 14 does not have the function as installation component.Again, the wide directionality speaker system 1 of Fig. 1 has diffuser 4, and the wide directionality speaker system 1F of Figure 14 does not have diffuser.The wide directionality speaker system 1F of Figure 14 also is an example of the present invention.
The example of above wide directionality speaker system with reference to Fig. 1～14 pair the present patent application carries out all explanations.Also have, described in the above in, the pyramid type loudspeaker unit is represented with the dynamic speaker unit, but the pyramid type loudspeaker unit is not limited to electrodynamic type, also can be the loudspeaker unit of other type of drive.Again, described in the above in, its oscillating plate of pyramid type loudspeaker unit has edge part, but also can be type for no reason at all.
Again, in the explanation of above-mentioned example, adopt the speaker system of ceiling embedded type to describe, but be not limited to this, for example also can be used in other forms of speaker systems such as boxlike speaker system.
The 2nd example
The 2nd example to the present patent application describes with reference to the accompanying drawings.At first use the schematic configuration of ceiling embedded type speaker system of cover attaching construction of an example of the present patent application to describe with reference to Figure 15～20 pair.Also have, the direction in the time of will making the lid rotation for chimeric lid on the speaker system main body in described below describes as the direction of " front " on the circumferencial direction.And as front end, its opposite end describes as cardinal extremity with the end in direction of rotation the place ahead.Again, the ceiling embedded type speaker system is to install downwards on as the ceiling face of planar portions, therefore the below is called the place ahead, and the top is called the rear and describes.
Figure 15 is the sectional arrangement drawing that is installed on the ceiling embedded type speaker system 100 on the ceiling wall 30.Ceiling face (surface) 30b of this ceiling wall 30 is planar portions.Ceiling embedded type speaker system 100 has speaker system main body (wide directionality speaker system) 1 and can see through the lid 40 of sound.
On ceiling wall 30, form circular opening (installing hole) 30a, on this opening 30a, embed speaker system main body 1.Speaker system main body 1 mainly is made of loudspeaker unit (pyramid type loudspeaker unit) 2 and installation component (throttle ele-ment) 10A.Form circular hole (medium pore) 11 at the central portion of installation component 10A, the oscillating plate 7 of loudspeaker unit 2 that is installed on the rear side of installation component 10A exposes from this circular hole 11.The installation component 10A that carries the state of loudspeaker unit 2 on the side overleaf is fixed in ceiling wall 30, speaker system main body 1 is fixed in ceiling face 30b with this and state of directly installing.Lid 40 front surfaces that are covered with the oscillating plate 7 of loudspeaker unit 2 are installed on installation component 10A.
Also have symbol 4 expression diffusers.
Figure 16 is a stereogram of seeing speaker system main body 1 from rear side.Figure 17 is the back view of speaker system main body 1.The shape of the periphery of installation component 10A is roughly circle.At the periphery of installation component 10A, the equal angles compartment of terrain forms main body side fitting portion 120 at 4 places, makes it outstanding to the radial direction outside.Comprise main body side fitting portion 120, installation component 10A utilizes the synthetic resin global formation to make.
The be roughly rectangular tabular component of main body side fitting portion 120 for extending to circumferencial direction.Main body side fitting portion 120 has horizontal part the 121, the 1st protuberance 123 and the 2nd protuberance 127.
In the central authorities of the circumferencial direction of main body fitting portion 120, form the horizontal part 121 that extends in the horizontal direction.The back of horizontal part 121 is horizontal plane to face (upper surface) 122.
At the circumferencial direction base end side of horizontal part 121, be connected with horizontal part 121, form than the back to face 122 the 1st outstanding protuberance 123 of (top) more rearward.The 1st protuberance 123 is that (tiltedly below) tilts toward oblique the place ahead to the circumferencial direction both sides on the boundary with top 124.Have two inclined planes 125,126.
On the circumferencial direction front of horizontal part 121, be connected with horizontal part 121, form than the back to face 122 the 2nd outstanding protuberance 127 of (top) more rearward.The 2nd protuberance 127 has the inclined plane 128 that tilts toward oblique rear (oblique upper) to circumferencial direction the place ahead from the front end of horizontal part 121.
Ratio the 2nd protuberance 127 of loud speaker main body 1 more on the position in circumferencial direction the place ahead, keeps the interval of regulation to form the face 129 that conflicts with the 2nd protuberance 127.This conflict face 129 is faces of approximate vertical, towards the 2nd protuberance 127 1 sides.
Figure 18 observes from rear side to cover 40 stereogram, and Figure 19 covers 40 back view, Figure 20 be Figure 18 the XX-XX line to pseudosection.
On the framework 41, to the radial direction inboard highlightedly with angle same at interval, side fitting portion 50 is covered in formation at 4 places.Comprise and cover side fitting portion 50, framework 41 utilizes the synthetic resin global formation to make.
Lid side fitting portion 50 is being formed on the lid 40 on the position corresponding with main body side fitting portion 120.The radial direction position of the lid side fitting portion 50 on the radial direction position of the main body side fitting portion 120 of speaker system main body 1 and the lid 40 about equally.Lid side fitting portion 50 is that being roughly of extending in a circumferential direction is rectangular tabular.Lid side fitting portion 50 has horizontal part 51 and the 3rd protuberance 53.
The horizontal part 51 of lid side fitting portion 50 extends its forward surface (lower surface) the 52nd, horizontal plane (with reference to Figure 20) in the horizontal direction.On the circumferencial direction front end of horizontal part 51, linking to each other with horizontal part 51 forms than forward surface 52 the 3rd outstanding protuberance 53 of (below) more forwards.
Step below with reference to Figure 21～Figure 24 explanation mounting cover 40 on the speaker system main body 1 of the state that is fixed in ceiling wall 30.
Figure 21 is fixed in the speaker system main body 1 on the ceiling wall 30 and the side view of the lid 40 that will be mounted thereon.To cover 40 when being installed on the loud speaker main body 1, and at first make the 1st protuberance 123 of main body side fitting portion 120 close mutually, will cover 40 and be embedded in speaker system main body 1 with the 3rd protuberance 53 of lid side fitting portion 50.
Figure 22 is under the state that (to make the 1st protuberance 123 and the 3rd protuberance 53 closely) as mentioned above chimeric with speaker system main body 1 and lid 40, observes both (main body side fitting portions 120 and lid side fitting portions 50) and the stereogram nearby time the thereof from the back side.Also have, in the figure, ceiling wall 30 omits.From such state (state of Figure 22), make and cover 40 to the rotation of circumferencial direction the place ahead, with this that two fitting portions are chimeric.
Figure 23 be utilize (a)～(d) represent stage by stage main body side fitting portion 120 and lid side fitting portion 50 chimeric mutually carry out state stereogram, Figure 24 be utilize (a)～(d) represent stage by stage main body side fitting portion 120 and lid side fitting portion 50 chimeric mutually carry out the state side view.
Figure 23 (a), Figure 24 (a) are the states in chimeric when beginning, are the state of the 3rd protuberance 53 when arriving the inclined plane 125 of the 1st protuberance 123.The 3rd protuberance 53 is drawn towards inclined plane 125, successfully is drawn towards top 124.On main body side fitting portion 120, supporting horizontal part 121 by support sector 130.But support sector 130 does not extend to the 1st protuberance 123, therefore the 1st protuberance 123 direction (above-below direction) deflection in a measure forwards, backwards.Thereby the 3rd protuberance 53 is when crossing the 1st protuberance 123, and the 1st protuberance 123 is (below) deflection forwards.By means of this, the 3rd protuberance 53 is crossed the 1st protuberance 123 easily.
Figure 23 (b), Figure 24 (b) are that the 3rd protuberance 53 is crossed the be up to the standard state of portion 121 of the 1st protuberance 123.
Figure 23 (c), Figure 24 (c) are the state of the 3rd protuberance 53 when reaching the inclined plane 128 of the 2nd protuberance 127.The 3rd protuberance 53 is drawn towards inclined plane 128, successfully is drawn towards the front end of the 3rd protuberance 127.On main body side fitting portion 120, the support sector 130 of support level portion 121 does not extend to the 2nd protuberance 127, therefore the 2nd protuberance 127 direction (above-below direction) deflection in a measure forwards, backwards.Thereby when the 3rd protuberance 53 will be crossed the 2nd protuberance 127, the 2nd protuberance 127 is (below) deflection forwards.By means of this, the 3rd protuberance 53 is crossed the 2nd protuberance 127 easily.
Figure 23 (d), Figure 24 (d) are the state of the 3rd protuberance 53 when crossing the 2nd protuberance 127.Make the integral body of covering side fitting portion 50 on main body side fitting portion 120, and make the forward surface of the horizontal part 51 that covers side fitting portion 50 be positioned at back than the horizontal part 121 of main body side fitting portion 120 to face 122 position of (top) more rearward.Even lid side fitting portion 50 moves to circumferencial direction the place ahead with coming back for moce, also, can not move in more multidirectional the place ahead owing to conflict with the face 129 that conflicts.Under such state, the 3rd protuberance 53 and the 2nd protuberance 127 form intermeshing state, only otherwise to covering 40 revolving forces that apply a certain degree size, just can not remove both engagements.That is to say that only otherwise apply the revolving force of a certain degree size, the 3rd protuberance 53 just can not oppositely be crossed the 2nd protuberance 127.Therefore, the state of lid 40 installation on speaker system main body 1 is a stable status.
The state of Figure 23 (d), Figure 24 (d) is the state of original chimerism when finishing.But, can think temporarily that also the main body side fitting portion 120 and the chimerism of lid side fitting portion 50 do not reach Figure 23 (d), the such completion status of Figure 24 (d), and be positioned over Figure 23 (b), the such state of Figure 24 (b).
That is to say, when the operator will be installed on speaker system main body 1 with lid 40, particularly cover under 40 rear end (upper end) and the situation that ceiling face 30b contacts, will be from the state of Figure 23 (a), Figure 24 (a) state transitions to Figure 23 (b), Figure 24 (b), also need covering 40 revolving forces that apply a certain degree size, even because under the state of Figure 23 (b), Figure 24 (b), also cover 40 tight situations.That is to say, although two fitting portions (main body side fitting portion 120 and lid side fitting portion 50) are Figure 23 (b), the such state of Figure 24 (b), the operator also might think by mistake and chimericly finish, at this state (state of Figure 23 (b), Figure 24 (b)) end operation down.
But even just placing under such state (state of Figure 23 (b), Figure 24 (b)), it also must be that the 3rd protuberance 53 is crossed the 1st protuberance 123 and returned that lid 40 comes off from speaker system main body 1.Therefore, must apply the revolving force of a certain degree size to covering 40, but so long as under the common user mode of ceiling embedded type speaker system 100, can not have such big revolving force to put on and cover 40.Even loudspeaker unit 2 is activated, speaker system 1 and lid 40 are under the situation of vibrational state, also can not apply to make the 3rd protuberance 53 cross the so big revolving force of the 1st protuberance 123.Therefore, under the common user mode of ceiling embedded type speaker system 100, lid 40 can not come off from speaker system main body 1.Therefore, the state of Figure 23 (b), Figure 24 (b) also can be thought main body side fitting portion 120 and the lid side fitting portion 50 chimeric states of finishing.
With reference to Figure 15～Figure 24 the present invention's one example is illustrated above.Below other forms are described.
Figure 25 is a stereogram of observing speaker system main body 1B and lid 40B from rear side.
On the installation component 10G of speaker system main body 1B, form main body side fitting portion 50B, on the framework 41B of lid 40B, form and cover side fitting portion 120B.
Lid side fitting portion 120B has horizontal part 121B, has the 1st protuberance 123B and the 2nd protuberance 127B at its two ends.Horizontal part 121B extends in a circumferential direction, and its forward surface (lower surface) is a horizontal plane.The 1st protuberance 123B and the 2nd protuberance 127B all than the forward surface of horizontal part 121B more forwards (below) outstanding.
Main body side fitting portion 50B has horizontal part 51B, has the 3rd protuberance 53B on the one end.The back of horizontal part 51B is horizontal plane to face (upper surface).The 3rd protuberance 53B than horizontal part 51B back to face more rearward (top) outstanding.
With Figure 25 and Figure 16, Figure 18 compares and can recognize, the structure of the lid side fitting portion 120B of Figure 25 is identical with the structure of the main body fitting portion 120 of Figure 16, the structure of the main body side fitting portion 50B of Figure 25 is identical with the structure of the lid side fitting portion 50 of Figure 18, that is to say, cover if the main body side fitting portion 120 of Figure 16 is arranged at the member of fore-and-aft direction (above-below direction) and circumferencial direction counter-rotating, just become the structure of the lid side fitting portion 120B of Figure 25, if the lid side fitting portion 50 of Figure 18 is arranged on the speaker system main body at the member of fore-and-aft direction (above-below direction) and circumferencial direction counter-rotating, just becomes the structure of the main body side fitting portion 50B of Figure 25.
If (below) embeds speaker system main body 1B and make its rotation from the place ahead lid 40B shown in Figure 25, then cover side fitting portion 120B on main body side fitting portion 50B.Then, cross under the state of the 3rd protuberance 53B, finish original chimerism at the 1st protuberance 123B and the 2nd protuberance 127B.
But, even cross the 3rd protuberance 53B at the 1st protuberance 123B, and the 2nd the protuberance 127B state of not crossing the 3rd protuberance 53B place down, under the common user mode of ceiling embedded type speaker system, lid 40B can not come off from speaker system 1B yet.Because it is come off, must apply and to make the 1st protuberance 123B cross the big revolving force that the 3rd protuberance 53B returns lid 40B, but under the common user mode of ceiling embedded type speaker system, lid 40B can not be applied in such revolving force.
Also have, in Figure 25, the face shown in the symbol 129B is the 3rd protuberance 53B and its conflict face that conflicts under chimeric completion status.
Abovely the various examples of the cover attaching construction of the plannar direct-mounted implements of the present patent application are illustrated with reference to Figure 15～Figure 25.
In above-mentioned example, the main body side fitting portion that is provided with identical structure on the loudspeaker unit main body is disclosed, cover the example of the lid side fitting portion that also is provided with identical structure.But these structures are not necessarily identical.For example also a plurality of main body side fitting portions can be set on the loudspeaker unit main body, a part wherein adopts the such main body side fitting portion 120 of Figure 16, and remaining then adopts the such main body side fitting portion 50B of Figure 25.At this moment, cover such lid side fitting portion 50 of Figure 18 and the such lid side fitting portion 120B of Figure 25 also can be set.
Again, in above-mentioned example, at loudspeaker unit main body and the fitting portion that covers whole employing the application's cover attaching construction, but the part in also can a plurality of fitting portions adopts the application's cover attaching construction, and remaining part then adopts the fitting portion (fitting portion as shown in Figure 27) of existing cover attaching construction.
Also have, in above-mentioned example, illustration the 1st protuberance and the 2nd protuberance on fore-and-aft direction (above-below direction), have flexual example, but also can make the 3rd protuberance have such pliability.Can make the 1st protuberance, the 2nd protuberance, the 3rd protuberance not have pliability again.
Also have, in above-mentioned example, as the plannar direct-mounted implements of the cover attaching construction that adopts the application, illustration the ceiling embedded type speaker system, still, the utensil that the present patent application can be suitable for is not limited thereto.For example, go for the fluorescent lamp utensil of the direct mount type of ceiling,, also can make euphotic cover not allow caducous mounting structure to use for the mounted apparatus main body of ring-type fluorescent lamp.Also have, be not limited to be used on the ceiling face and install, also can be used in the utensil of directly installing on side at side wall surface, main equipment apparatus, the panel etc.
More than, the example of the cover attaching construction of the wide directionality speaker system of the present patent application and plannar direct-mounted implements is illustrated.
From top explanation, the technical staff of the industry can understand many improvement of the present invention and other examples.Thereby above-mentioned explanation should only explain that as illustration its purpose is the those of ordinary skill illustration of the industry is carried out best example of the present invention.Under the situation that does not break away from spirit of the present invention, can to its structure with and/or the details of function carry out substantial change.
Industrial applicability
Wide directionality speaker system of the present invention can further expand directivity, is useful in the field of speaker system therefore.
Again, in the cover attaching construction of plannar direct-mounted implements of the present invention, even contrast is not reaching under the situation that original chimeric completion status just placing at the lid of installing on the appliance body, lid also is not easy to come off from appliance body, and therefore the field of direct mounted apparatus is useful on planar portions.
Claims (16)
1. a wide directionality speaker system possesses pyramid type loudspeaker unit and throttle ele-ment, it is characterized in that,
This pyramid type loudspeaker unit has oscillating plate,
This throttle ele-ment covers the place ahead of this oscillating plate,
Form medium pore and periphery hole on this throttle ele-ment,
This medium pore is positioned at the place ahead of the central portion of this oscillating plate,
This periphery hole is positioned at this medium pore to the radial direction outside,
The area summation of this medium pore and this periphery hole is littler than the area of this oscillating plate,
In this throttle ele-ment, to the radial direction outside, and be this periphery hole at this medium pore to the inboard place of radial direction, form the shielding portion of ring-type,
The outer end of the radial direction of this shielding portion is positioned at the roughly position intermediate of the radial direction outer end of the radial direction outer end of this medium pore and this periphery hole, or than this centre position more by the position in the radial direction outside.
2. wide directionality speaker system according to claim 1 is characterized in that, the radial direction outer end of this periphery hole and is positioned near the periphery of this oscillating plate on radial direction.
3. wide directionality speaker system according to claim 1 and 2 is characterized in that, surrounds this medium pore fully and forms this periphery hole.
4. wide directionality speaker system according to claim 1 and 2 is characterized in that this periphery hole has a plurality of, and these a plurality of periphery holes surround this medium pore fully to be disperseed to form.
5. wide directionality speaker system according to claim 1 and 2 is characterized in that, this periphery hole surrounds this medium pore and forms, and the central shaft that forms with this pyramid type loudspeaker unit is the angular range more than 180 ° at center.
6. wide directionality speaker system according to claim 1 and 2, it is characterized in that, this periphery hole has a plurality of, and these a plurality of periphery holes surround this medium pore and form, and is the angular range dispersion formation more than 180 ° at center at the central shaft with this pyramid type loudspeaker unit.
7. according to claim 5 or 6 described wide directionality speaker systems, it is characterized in that, is in the angular range more than 45 ° at center at the central shaft with this pyramid type loudspeaker unit, does not form this periphery hole.
8. according to claim 4 or 6 described wide directionality speaker systems, it is characterized in that this periphery hole is the slit-shaped apertures of extending on radial direction.
9. wide directionality speaker system according to claim 8 is characterized in that the slit width of this periphery hole is narrower than the degree of depth of this periphery hole.
10. according to each the described wide directionality speaker system in the claim 1～9, it is characterized in that the configuration of this periphery hole is with respect to the asymmetric form of the central shaft of this pyramid type loudspeaker unit.
11. each the described wide directionality speaker system according in the claim 1～10 is characterized in that, in the place ahead of this medium pore diffuser is set.
12. the cover attaching construction of a plannar direct-mounted implements is characterized in that,
Possess the appliance body of directly installing in planar portions and be installed on lid on this appliance body with being covered with this appliance body front surface,
The circular periphery that is roughly at this appliance body is provided with the main body side fitting portion,
On the position corresponding of this lid, be provided with and cover the side fitting portion with this main body side fitting portion,
This main body side fitting portion has: extend the back cardinal extremity that has direction to face, in this back to the extension of face that exists in a circumferential direction, than this back to more outstanding the 1st protuberance of face and the front end that has direction in this back to the extension of face, than the 2nd protuberance of more rearward giving prominence to face after this
This lid side fitting portion has in a circumferential direction and to extend the forward surface that exists and to have the front end of direction in the extension of this forward surface, 3rd protuberance more outstanding than this forward surface,
This lid is being installed, when making it cover this appliance body from the front, this main body side fitting portion is set on this appliance body, makes the forward surface of this lid side fitting portion can be positioned at back than this main body side fitting portion, and this lid side fitting portion is arranged at this and covers to face rear more.
13. the cover attaching construction of a plannar direct-mounted implements is characterized in that,
Possess the appliance body of directly installing in planar portions and be installed on lid on this appliance body with being covered with this appliance body front surface,
The circular periphery that is roughly at this appliance body is provided with the main body side fitting portion,
On the position corresponding of this lid, be provided with and cover the side fitting portion with this main body side fitting portion,
This lid side fitting portion has: the forward surface that extend to exist in a circumferential direction, have the front end of direction in the extension of this forward surface, than more outstanding the 1st protuberance of this forward surface and the cardinal extremity that has direction in the extension of this forward surface, 2nd protuberance more outstanding than this forward surface
This main body side fitting portion, have in a circumferential direction extend exist back to face and in this back the cardinal extremity to the bearing of trend of face, the 3rd protuberance of more rearward giving prominence to face than this back,
In that this lid is installed, when making it cover this appliance body, this main body side fitting portion is set on this appliance body from the front, what make that the forward surface of this lid side fitting portion is positioned at this main body side fitting portion is back to face rear more, and this lid side fitting portion is arranged at this and covers.
14. cover attaching construction according to claim 12 or 13 described plannar direct-mounted implements, it is characterized in that, a plurality of these main body fitting portions are arranged at this appliance body, a plurality of lid side fitting portions are arranged at this and cover, and these a plurality of main body side fitting portions are arranged on the mutual corresponding position with these a plurality of lid side fitting portions.
15. the cover attaching construction according to each the described plannar direct-mounted implements in the claim 12～14 is characterized in that, part or all in the 1st protuberance, the 2nd protuberance and the 3rd protuberance, direction deflection forwards, backwards.
16. cover attaching construction according to each the described plannar direct-mounted implements in the claim 12～15, it is characterized in that, this plannar direct-mounted implements is the ceiling embedded type speaker system, and this appliance body has loudspeaker unit, and this lid is the lid that can see through sound.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002337104A JP3818957B2 (en) | 2002-11-20 | 2002-11-20 | Cover mounting structure for equipment directly attached to a flat surface |
| JP337104/2002 | 2002-11-20 | ||
| JP356719/2002 | 2002-12-09 | ||
| JP2002356719A JP3818959B2 (en) | 2002-12-09 | 2002-12-09 | Wide directional speaker system |
| PCT/JP2003/014779 WO2004047483A1 (en) | 2002-11-20 | 2003-11-20 | Wide directionality speaker system, and cover attaching construction for planar direct-mounted implements |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101455646A Division CN101820560B (en) | 2002-11-20 | 2003-11-20 | Cover mounting structure for flat direct-mounted appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1711798A true CN1711798A (en) | 2005-12-21 |
| CN1711798B CN1711798B (en) | 2010-04-28 |
Family
ID=32700745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200380103422.1A Expired - Lifetime CN1711798B (en) | 2002-11-20 | 2003-11-20 | Wide directivity speaker system and cover mounting structure of flat surface direct mount device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3818957B2 (en) |
| CN (1) | CN1711798B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104717586B (en) * | 2008-08-14 | 2019-06-11 | 哈曼国际工业有限公司 | Phase plug and acoustic lens for direct radiator type loudspeaker |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200446403Y1 (en) * | 2009-03-27 | 2009-10-27 | 주식회사 인터엠 | Speaker apparatus |
| JP7232899B2 (en) * | 2019-03-26 | 2023-03-03 | ＡｌｐｈａＴｈｅｔａ株式会社 | recessed speaker |
-
2002
- 2002-11-20 JP JP2002337104A patent/JP3818957B2/en not_active Expired - Fee Related
-
2003
- 2003-11-20 CN CN200380103422.1A patent/CN1711798B/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104717586B (en) * | 2008-08-14 | 2019-06-11 | 哈曼国际工业有限公司 | Phase plug and acoustic lens for direct radiator type loudspeaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1711798B (en) | 2010-04-28 |
| JP3818957B2 (en) | 2006-09-06 |
| JP2004173007A (en) | 2004-06-17 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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