CN101490945A - Drive regulation structure of piezoelectric actuator and lens drive equipped with the same - Google Patents
Drive regulation structure of piezoelectric actuator and lens drive equipped with the same Download PDFInfo
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- CN101490945A CN101490945A CNA2007800262337A CN200780026233A CN101490945A CN 101490945 A CN101490945 A CN 101490945A CN A2007800262337 A CNA2007800262337 A CN A2007800262337A CN 200780026233 A CN200780026233 A CN 200780026233A CN 101490945 A CN101490945 A CN 101490945A
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- motor
- driving
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- 230000001105 regulatory effect Effects 0.000 abstract 2
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- 230000001276 controlling effect Effects 0.000 abstract 1
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 8
- 230000001141 propulsive effect Effects 0.000 description 6
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- 230000000903 blocking effect Effects 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 3
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- 238000006073 displacement reaction Methods 0.000 description 2
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- 229910001220 stainless steel Inorganic materials 0.000 description 2
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- 229910001369 Brass Inorganic materials 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
- H02N2/043—Mechanical transmission means, e.g. for stroke amplification
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
- G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/0095—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing combined linear and rotary motion, e.g. multi-direction positioners
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0053—Driving means for the movement of one or more optical element
- G03B2205/0061—Driving means for the movement of one or more optical element using piezoelectric actuators
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
- G03B3/10—Power-operated focusing
Abstract
The invention provides a drive regulation structure of a piezoelectric actuator for efficiently regulating parallel translation of the rotating shaft of the piezoelectric actuator without causing any damage on the peripheral member or abrasion thereof. The drive regulation structure of a piezoelectric actuator for rotating the rotating shaft by controlling application of a voltage to a piezoelectric element and translating the rotating shaft to the axial direction is characterized by comprising a stopper (7c) projecting in the direction intersecting the axial direction of a rotating shaft (7b) perpendicularly and rotating integrally with the rotating shaft (7b), and regulation pieces (16a, 16b) abutting against the stopper (7c) when the rotating shaft (7b) translates up to a predetermined position and regulating rotation of the rotating shaft (7b).
Description
Technical field
The lens driver of this structure is constructed and is had in the driving restriction that the present invention relates to a kind of piezoelectric actuator, relate in particular to the voltage that a kind of control applies piezoelectric element and make the rotating shaft rotation, and the driving restriction structure of parallel vertically mobile piezoelectric actuator and have the lens driver of this structure.
Background technology
At present, piezoelectric actuator is widely used in the precision control of semiconductor manufacturing or industry device etc.In recent years, the application in digital camera or band camera mobile phone etc. sharply enlarges, and for example, utilizes the various fields such as drive controlling of the lens of using in the hand shake correcting function or the automatic focus of digital camera.
As such piezoelectric actuator, a kind of piezoelectric actuator is provided, its have outer circumference surface be formed with ridge rotating shaft, inner peripheral surface be formed with the ridge corresponding with the ridge of this rotating shaft nut, keep rotating shaft and nut and paste a plurality of piezoelectric element shells at its lateral surface, the voltage that puts on piezoelectric element by switching makes the piezoelectric element stretch/shrink, make the rotating shaft rotation, make rotating shaft parallel vertically mobile (referring to Patent Document 1) simultaneously.
Patent documentation 1: No. 6940209 specification of United States Patent (USP)
In above-mentioned such voltage actuator and since be accompanied by piezoelectric element flexible by ridge slipping and on rotating shaft, produce propulsive force each other, therefore need on the rightabout of direction of propulsion, apply certain load to rotating shaft in advance.In addition, need move the parallel of certain position limit rotating shaft.At this, under the situation that the straightaway that utilizes like this butt parts with respect to the moving direction quadrature of rotating shaft to limit rotating shaft is moved, the butt parts become the load of rotating shaft for the restraint of rotating shaft like this, and propulsive force further improves.Consequently have the breakage of butt parts, or rotating shaft is nipped the butt parts and the problem that can not extract from halted state.
Summary of the invention
The present invention proposes in view of this problem, the lens driver that purpose is to provide a kind of driving restriction structure of piezoelectric actuator and has this structure, it can not make the damaged or wearing and tearing of circumferential component, can effectively limit the parallel of rotating shaft that piezoelectric actuator has and move.
Piezoelectric element is applied voltage and make the rotating shaft rotation in control of the present invention, and make in the driving restriction structure of the parallel vertically mobile piezoelectric actuator of this rotating shaft, it is characterized in that, the driving restriction structure of described piezoelectric actuator has projecting part and limiting part, described projecting part is to outstanding with the direction of the axial quadrature of described rotating shaft, with this rotating shaft one rotation, described limiting part limits the rotation of described rotating shaft when described rotating shaft parallel moves to certain position and described projecting part butt.
Driving restriction structure according to above-mentioned piezoelectric actuator, when rotating shaft parallel moves to certain position, rotation by limiting part restriction rotating shaft, can utilize the butt parts with the moving direction quadrature of rotating shaft, compare the rotation that little power limits rotating shaft with the situation of blocking the propulsive force that on rotating shaft, produces.Thus, can not make the damaged or wearing and tearing of circumferential component, limit the parallel of rotating shaft that piezoelectric actuator has effectively and move.
In the driving restriction structure of above-mentioned piezoelectric actuator, sky can be opened the axial arrangement of two described limiting parts of certain intervals along described rotating shaft.At this moment, in the scope that is arranged at two intervals between the limiting part, allow the parallel of rotating shaft to move, and can limit the parallel of axial two directions of rotation by two limiting parts and move.
In the driving restriction structure of above-mentioned piezoelectric actuator, can be that described limiting part is integrally formed with the holding member that keeps described piezoelectric actuator.At this moment, owing to need not dispose the structure that keeps limiting part,, can reduce the manufacturing cost of this structure so can reduce number of spare parts.
And, also the driving restriction structure of each described piezoelectric actuator in the technical scheme 1～3 can be applicable to lens driver.Be applicable to lens driver by driving restriction structure, in lens driver, also can obtain above-mentioned effect these piezoelectric actuators.
According to the present invention, can be under the situation that does not make the damaged or wearing and tearing of circumferential component, limit the parallel of rotating shaft that piezoelectric actuator has effectively and move.
Description of drawings
Fig. 1 is the exploded perspective view that the driving of the piezoelectric actuator of suitable one embodiment of the present invention limits the lens driver of structure;
Fig. 2 is the stereoscopic figure of the situation of assembling lens driver shown in Figure 1;
Fig. 3 is the in-built stereogram of the lens driver of the above-mentioned execution mode of expression;
Fig. 4 is the in-built vertical view of the lens driver of the above-mentioned execution mode of expression;
Fig. 5 is the profile of solid line A-A shown in Figure 4;
Fig. 6 is the profile of realization B-B shown in Figure 4;
Fig. 7 is the exploded view that is used to illustrate the formation of the motor that the lens driver of above-mentioned execution mode has;
Fig. 8 is the stereogram that is used to illustrate the formation of the limiting plate (stopplate) that the lens driver of above-mentioned execution mode has;
Fig. 9 is used to illustrate the stereogram that concerns between stop that the lens driver of above-mentioned execution mode has and the limiting plate;
Figure 10 is used to illustrate the stereogram that concerns between stop that the lens driver of above-mentioned execution mode has and the limiting plate;
Figure 11 is the ideograph that is used to illustrate the formation of the lens carrier that the lens driver of above-mentioned execution mode has;
Figure 12 is the ideograph that is used to illustrate the formation of first lens that lens carrier that the lens driver of above-mentioned execution mode has keeps;
Figure 13 is the ideograph that is used to illustrate the formation of second lens that lens carrier that the lens driver of above-mentioned execution mode has keeps;
Figure 14 is the ideograph that is used to illustrate the formation of the 3rd lens that lens carrier that the lens driver of above-mentioned execution mode has keeps;
Embodiment
Below, the execution mode that present invention will be described in detail with reference to the accompanying.
Fig. 1 is the exploded perspective view that the driving of the piezoelectric actuator of suitable one embodiment of the present invention limits the lens driver of structure; Fig. 2 is the stereoscopic figure of the situation of assembling lens driver shown in Figure 1.
As shown in Figure 1, the lens driver 1 of present embodiment comprises: the substrate 3 of installation diagram image-position sensor 2; The pedestal 5 of IR cut-off filter 4 is installed; Lens carrier 6 is installed and as the housing 8 of the motor 7 of piezoelectric actuator etc.; The radome 9 of case 8.
At minor diameter part 6a, the surface is formed with the peristome 6d that works as light inlet thereon.In addition, be formed with to the side-prominent a pair of protrusion tab 6e in the side of lens driver 1.Protrusion tab 6e is housed in the slot part 17c that is formed on the rotation restricting unit 17 described later, shown in Figure 1 the moving up and down of attachment lens support 6.On large-diameter portion 6b, be formed with to the side-prominent a plurality of protrusion tab 6f in the side one of lens driver 1.Protrusion tab 6f has inclined plane part 6g at lower surface, and inclined plane part 6g is in the upper surface slide of cam gear 13.In addition, the upper surface at large-diameter portion 6b is formed with hooking sheet 6h, the bottom that hooking sheet 6h card ends force application spring 17 described later.
Rack-plate 11 is formed by the resin material of insulating properties, have the tooth-strip part 11a that is housed in slot part 8i and with the upwardly extending planar portions 11b in side of this tooth-strip part 11a quadrature.Form cross section T word shape by tooth-strip part 11a and planar portions 11b, only accommodate tooth-strip part 11a at slot part 8i.The square end portion of planar portions 11b (end of side 8c side) is towards the inside bend of lens driver 1, erects at the upper surface of the part of this bending and is provided with the axle 11c that engages with the 12e of hole portion of linkage component 12.In addition, the upper surface in the opposing party end (end of side 8j side) of planar portions 11b is provided with hooking sheet 11d, and hooking sheet 11d card ends to the end of side 8c side to the force application spring 15 of rack-plate 11 application of forces.
Motor 7 has shell 7a and rotating shaft 7b, and shell 7a has rectangular shape, and rotating shaft 7b is housed in this shell 7a, moves vertically from the one end.As described later, the voltage that a plurality of voltage components of the outer surface that is installed in shell 7a is applied voltage by control applies and makes shell 7a produce displacement constantly, and rotating shaft 7b is parallel vertically thus moves.And, near the leading section of rotating shaft 7b, be fixed with ring 7d with stop 7c.Stop 7d works as projecting part, contacts with margining tablet 16a, the 16b of limiting plate 16 described later corresponding to the parallel mobile of rotating shaft 7b.And, for the structure aftermentioned of this motor 7.
Support of motor 14 is formed by the resin material of insulating properties, is fixed on the upper surface of the side 8g of housing 8.Support of motor 14 has near the motor maintaining part 14b the end (end of the side 8i side of housing 8) that is fixed on the last 14a of basic courses department of side 8g and keeps motor 7.The part in the inboard of device of the 14a of basic courses department is made as circular shape along the shape of cam supporting part 8b.
End (end of the side 8c side of housing 8) at the 14a of basic courses department is fixed with limiting plate 16.On limiting plate 16, be formed with a pair of margining tablet 16a, 16b, a pair of margining tablet 16a, 16b when rotating shaft 7b moves to certain position with rotating shaft 7b on fixing stop 7c contact the driving of restrictions motor 7.These margining tablets 16a, 16b work as limiting part.And, for the detailed structure aftermentioned of this limiting plate 16.
Radome 9 is formed by stainless steel and other metal materials, is made of the case shape parts of lower opening.Central portion at upper surface is formed with circular peristome 9a.Four jiaos of radome 9 have the shape that caves in to the inboard of device a little, be formed with in its bottom the 9b of foot is installed.It is more outstanding a little to the lower side than the bottom of radome 9 that the 9b of foot is installed, and is housed among the recess 5c of pedestal 5.Be formed with the 9c of hole portion that engages with a pair of projection 8h in the side corresponding of radome with side 8f, 8g.
When assembling has the lens driver 1 of this structure, at first, the pedestal 5 of IR cut-off filter 4 has been installed in the upper fixed of the substrate 3 that imageing sensor 2 has been installed.Then, lens carriers 6 are installed, and Hall element 10, rack-plate 11 and linkage component 12 are installed, and then will be positioned in the top of pedestal 5 through the housing 8 that support of motor 14 has been installed motor 7 through cam gear 13.Then, under the rotation restricting unit 17 that force application spring 18 will be installed is installed in state on the lens carrier 6, cover radome 9 from the top, and be fixed and be installed on the pedestal 5, this lens driver 1 is finished in assembling thus.
More particularly, in the process of radome 9 being covered on housing 8, the projection 8h that forms in the side of housing 8 engages with the 9c of hole portion of radome 9, and thus, radome 9 is limited to housing 8.Then, fixedly mount by utilizing binding agent etc., this lens driver 1 is finished in assembling.As shown in Figure 2, the lens driver of having assembled like this 1 is maintained at following state, promptly the peristome 6d that forms on the minor diameter part 6a of lens carrier 6 as described later, constitutes lens carrier 6 and moves up and down corresponding to the driving of motor 7 in the face of the state of the peristome 9a of radome 9.
Below, utilize Fig. 3～Fig. 6 that the internal structure of the lens driver 1 of such assembling is described.Fig. 3 is the stereogram of the internal structure of expression lens driver 1, and Fig. 4 is the vertical view of the internal structure of expression lens driver 1.Fig. 5 is the profile of solid line A-A shown in Figure 4, and Fig. 6 is the profile of solid line B-B shown in Figure 4.Wherein, in Fig. 5 and Fig. 6, the lens that are maintained on the lens carrier 6 omit.
When such assembling lens driving device 1, in the 8f of the side of housing 8, as shown in Figure 3, mounting teeth batten 11 under the state that according to mode tooth-strip part 11a is housed among the slot part 8i with tooth-strip part 13f engagement.In this case, between the hooking sheet 11d of rack-plate 11 and the 8k of wall portion, dispose force application spring 15, with rack-plate 11 to the arrow A direction application of force shown in Figure 3.
In addition, in the 8c of the side of housing 8, as shown in Figure 3, be fixed with Hall element 10 at notch part 8d.In addition, as Fig. 3 and shown in Figure 4,, make axle 8e is housed among the 12d of hole portion, and axle 11c (with reference to figure 4) is housed among the 12e of hole portion at the upper surface installing connecting rods parts 12 of side 8c.
And then in the 8g of the side of housing 8, as Fig. 3 and shown in Figure 4, mounted on surface has support of motor 14 (with reference to figure 4) thereon.And, maintain motor 7 at the motor maintaining part 14b of this support of motor 14.In this case, the front end of the rotating shaft 7b of motor 7 becomes the state with the abutting part 12a butt of linkage component 12, and the stop 7c (with reference to figure 4) that is fixed near the ring 7d its leading section becomes the state (initial condition) of the lower side that is configured in the margining tablet 16b that forms on the limiting plate 16.
In addition, in the lens driver 1 of assembling, the bottom of lens carrier 6 such as Fig. 5 and shown in Figure 6 are housed in the peristome 8a of housing 8, are installed on the housing 8 through being positioned in the cam gear 13 on the cam supporting part 8b.In this case, it is consistent that the center that is installed in the imageing sensor 2 on the substrate 3 is configured to the center of the minor diameter part 6a that has with lens carrier 6 and large-diameter portion 6b.
In addition, as shown in Figure 5, the large-diameter portion 6b that has at lens carrier 6 is formed with the resettlement section 6c of a part of accommodating motor 7.Motor 7 is being maintained on the support of motor 14 under the state that is accommodated in this resettlement section 6c.So,, the center of lens carrier 6 is offset, can keeps motor 7 by not being outer but in the zone of lens carrier 6, be formed on a part of accommodating motor 7 among the 6c of resettlement section in the zone of lens carrier 6.And, in the present embodiment, one side (limit 2b shown in Figure 1) of medial surface and the imageing sensor 2 of resettlement section 6c is be arranged in parallel.Thus, under the situation that has formed resettlement section 6c, the scope of the view data that is obtained by imageing sensor 2 can not be restricted yet.
At this, utilize Fig. 7 that the structure of above-mentioned motor 7 is described.Fig. 7 is the exploded view of structure that is used to illustrate the motor 7 of present embodiment.Wherein in Fig. 7,, omit its explanation for the structure mark same-sign that Fig. 1 has illustrated.
The motor 7 of present embodiment for example is made of the known piezoelectric actuator of prior art.In motor shown in Figure 77, shell 7a is formed by brass etc., for example is set as the shape of the cuboid that has excised the bight.Rotating shaft 7b is for example formed by stainless steel and other metal materials, is formed with the ridge of a constant pitch at its outer circumference surface.Be formed with the through hole that rotating shaft 7b connects in the inside of shell 7a, peristome in one side is installed nut 7e, nut 7e is formed with ridge with the engagement of the ridge of rotating shaft 7b at inner peripheral surface, is equipped with at the opposing party's peristome to keep rotating shaft 7b and make its rotatable bearing 7f.At the ring 7d that has stop 7c near the fixed installation leading section of the outstanding rotating shaft 7b of nut 7e.Upper surface and lower surface at shell 7a are installed piezoelectric element 7g, 7h, in the side of shell 7a piezoelectric element 7i, 7j are installed on the other hand.For example, piezoelectric element 7g～7j is installed in the outer surface of shell 7a by binding agent etc.
In the motor 7 with this structure, for example piezoelectric element 7g and 7h are connected with first power supply, and piezoelectric element 7i and 7j are connected with second source, shell 7a ground connection.When piezoelectric element 7g and 7h are applied voltage, since contrary piezoelectric effect, a side piezoelectric element 7g (or piezoelectric element 7h) elongation, and the opposing party's piezoelectric element 7h (or piezoelectric element 7g) shrinks.Equally, when piezoelectric element 7i and 7j are applied voltage, since contrary piezoelectric effect, a side piezoelectric element 7i (or piezoelectric element 7j) elongation, and the opposing party's piezoelectric element 7j (or piezoelectric element 7i) shrinks.In motor 7, switch in turn by the moment the voltage that imposes on such piezoelectric element 7g and 7h and piezoelectric element 7i and 7j, make shell 7a displacement.Then, carry out circular motion, make with the rotating shaft 7b of its engagement is parallel vertically and move by making the nut 7e that is installed on the shell 7a.
In this lens driver 1, the horizontal movement of the rotating shaft 7b that such motor 7 causes passes to lens carrier 6 through linkage component 12, rack-plate 11 and cam gear 13, changes on this bang path with moving both vertically, and lens carrier 6 is moved up and down.That is, when rotating shaft 7b is parallel when moving and extruding abutting part 12a, the application of force direction of corresponding with it holding section 12b customer service force application spring 15 and rack-plate 11 is moved.When rack-plate 11 moved, cam gear 13 is corresponding rotation with it.When cam gear 13 rotations, push protrusion tab 6f to top along the shape of cam part 13a.Thus, lens carrier 6 is moved upward.On the other hand, move when rotating shaft 7b is parallel, when abutting part 12a turned back to initial position, with identical main points, cam gear 13 rotations were pushed protrusion tab 6f to below along the shape of cam 13a, and lens carrier 6 moves downwards.
Below, the structure of limiting plate 16 is described, and the relation of stop 7c and limiting plate 16 is described.Fig. 8 is the stereogram that is used to illustrate the structure of limiting plate 16, and Fig. 9 and Figure 10 are the stereograms that is used to illustrate the relation of stop 7c and limiting plate 16.And, in Fig. 8, illustrate stop 7c and be configured in situation between margining tablet 16a and the margining tablet 16b.
As shown in Figure 8, limiting plate 16 is installed in a side the end of the 14a of basic courses department of support of motor 14.Margining tablet 16a, 16b open the certain intervals configuration along the axial sky of rotating shaft 7b.Specifically, form to motor 7 one sides by a part of warpage the upper side of limiting plate 16.And, between margining tablet 16a and margining tablet 16b, be formed with notch part 16c.Under the state that is fixed on the support of motor 14, the front end of stop 7c is configured in the position corresponding with margining tablet 16a, 16b, perhaps be configured in margining tablet 16a and margining tablet 16b between the corresponding position of notch part 16c.
Under motor 7 was fixed on initial condition on the support of motor 14, as shown in Figure 9, stop 7c became the state of the lower zone that is configured in margining tablet 16b.That is, rotating shaft 7b becomes the state that can further not enter the private side of shell 7a.When this state applies voltage with moment of regulation to the piezoelectric element 7g～7j of motor 7, on one side rotating shaft 7b rotate to the direction of arrow shown in Figure 9, parallel mobile to the front direction shown in this figure on one side.When stop 7c is configured in position by notch part 16c, the restriction of rotating shaft 7b unrestricted 16a, 16b and parallel moving.Then, when moving to certain position, as shown in figure 10, stop 7c is connected to the upper surface of margining tablet 16a when parallel, the rotation of restriction rotating shaft 7b.It is parallel mobile to front direction shown in Figure 10 consequently to limit rotating shaft 7b.
In the lens actuating device 1 of such present embodiment, when rotating shaft 7b is parallel when moving to certain position, because rotation by margining tablet 16a restriction rotating shaft 7b, so can utilize the butt parts with the moving direction quadrature of rotating shaft 7b, compare the rotation that little power limits rotating shaft 7b with the situation of blocking the propulsive force that on rotating shaft 7b, produces.Thus, can not make the damaged or wearing and tearing of circumferential component, limit the parallel of rotating shaft 7b effectively and move.
Below, utilize Figure 11～Figure 14 that the structure of lens carrier 6 and the structure that remains on the lens on the lens carrier 6 are described.Figure 11 be the lens carrier 6 that is used to illustrate present embodiment with and the ideograph of the structure of the lens that kept.The profile of the lens carrier 6 under the state of Figure 11 (a) expression maintenance lens, Figure 11 (b) is the vertical view that remains on the lens on the lens carrier 6.And, in Figure 11 (b), for convenience of explanation, omitted lens carrier 6.Figure 12, Figure 13 and Figure 14 are respectively the ideographs that is used to illustrate the structure of first lens, second lens and the 3rd lens that the lens carrier 6 of present embodiment is kept.
Shown in Figure 11 (a), lens carrier 6 is side within it, takes in by resin material along optical axis direction to form and variform three lens, i.e. first lens 19, second lens 20 and the 3rd lens 21.At this, the diameter of first lens 19 forms less than the diameter of second lens 20, and first lens 19 are configured in the assigned position of second lens, 20 tops.The diameter of second lens 20 forms less than the diameter of the 3rd lens 21, and second lens 20 are configured in the assigned position of the 3rd lens 21 tops.The shape that lens carrier 6 is configured to and the external shape of stacked like this first lens 19, second lens 20 and the 3rd lens 21 matches.
As shown in figure 12, first lens 19 have the lens section 19a that comprises convex lens.Shown in Figure 12 (a), roughly rounded when lens section 19a overlooks.In addition, shown in Figure 12 (b), portion forms the bellying 19b that bloats upward in the central, and is formed with the location division 19c of outstanding toroidal downwards in its outer peripheral edges portion.And location division 19c forms as the part of lens section 19a, forms with the precision identical with lens section 19a.
As shown in figure 13, second lens 20 have the lens section 20a that comprises concavees lens.Shown in Figure 13 (a), lens section 20a is the circle of state of a part of breach of left side when overlooking.In addition, shown in Figure 13 (b), portion forms the protuberance 20b of outstanding a little upward circle in the central, and is formed with the location division 20c of outstanding circular shape downwards in its outer peripheral edges portion.The central portion of protuberance 20c caves in a little to the lower side.And location division 20c and location division 19c are same, as the part formation of lens section 20a.
As shown in figure 14, the 3rd lens 21 have the lens section 21a that comprises non-spherical lens.Shown in Figure 14 (a), roughly rounded when lens section 21a overlooks.In addition, shown in Figure 14 (b), form the location division 21b of outstanding upward circular shape in its outer peripheral edges portion.And location division 21b and location division 19c or location division 20c are same, as the part formation of lens section 21a.In addition, shown in Figure 14 (b), be formed with planar portions 21c in certain zone of the left side of lens section 21a.Planar portions 21c has the corresponding shape of part with the toroidal breach of second lens 20.
Under the breach that described first lens 19, second lens 20 and the 3rd lens 21 is housed in the lens carrier 6, shown in Figure 11 (a), so that the location division 19c of first lens 19 mode consistent with the outer circumference surface of the protuberance 20c of second lens 20 is configured in first lens 19 top of second lens 20.Then, so that the location division 20c of second lens 20 mode consistent with the outer circumference surface of the location division 21b of the 3rd lens 21 is configured in second lens 20 top of the 3rd lens 21.Then, so that the mode that is connected to the inner peripheral surface of lens carrier 6 corresponding to the circumference face of planar portions 21c is housed in lens carrier 6 with these lens.
Overlapping on optical axis direction by first lens 19～the 3rd lens 21 that will have such shape, shown in Figure 11 (a), above the planar portions 21c of the 3rd lens 21, do not dispose other lenses.Lens carrier 6 is set as the shape that the shape with overlapping like this first lens 19～the 3rd lens 21 matches, and therefore, guarantees certain space at the Outboard Sections of lens carrier 6 above planar portions 21d.In this lens driver 1, shown in Figure 11 (a), resettlement section 6c is set in this space, accommodate motor 7.
So according to the driving restriction structure of the piezoelectric actuator of present embodiment, when rotating shaft 7b is parallel when moving to certain position, rotation by margining tablet 16a, 16b restriction rotating shaft 7b, so can utilize the butt parts with the moving direction quadrature of rotating shaft 7b, compare the rotation that little power limits rotating shaft 7b with the situation of blocking the propulsive force that on rotating shaft 7b, produces.Thus, can not make the damaged or wearing and tearing of circumferential component, limit the parallel of rotating shaft 7b effectively and move.
Especially, according to the driving restriction structure of the piezoelectric actuator of present embodiment, sky is opened two margining tablet 16a, 16b of the certain intervals axial setting along rotating shaft 17b.Thus, in the scope that is arranged at the interval (notch part 16c) between margining tablet 16a, the 16b, allow the parallel of rotating shaft 7b to move, and the parallel of two axial directions that can limit rotating shaft 7b by margining tablet 16a, 16b moved.
And the present invention is not limited to above-mentioned execution mode, can carry out various changes and implement.In the above-described embodiment,, be not limited thereto, can in the scope of performance effect of the present invention, suitably change about size shown in the drawings or shape etc.In addition, only otherwise break away from the scope of purpose of the present invention, can suitably change and implement.
For example, in the driving of above-mentioned piezoelectric actuator restriction structure, the limiting plate 16 with margining tablet 16a, 16b and support of motor 14 are different parts and independently constitute, but also described limiting plate 16 and support of motor 14 can be formed as one.Under the situation of so change, owing to there is no need limiting plate 16 is fixed on the support of motor 14, so can reduce the manufacturing cost that number of spare parts reduces this structure.
In addition, in the above-described embodiment, be applicable to that for driving restriction structure the situation of lens driver 1 is illustrated, but limit the content of the device body of structure about the driving that is suitable for this piezoelectric actuator piezoelectric actuator, be not limited thereto, can suitably change.For example, applicable to valve gear that in various switching mechanisms, uses etc.At this moment, in valve gear, can obtain above-mentioned effect.
Industrial applicibility
As described above, the driving limit structure of piezoelectric actuator of the present invention and have this structure Lens driver is control voltage that piezoelectric element is applied and rotating shaft is moved, and makes its edge Axially parallel moves, but the rotating shaft parallel is during to certain position, by utilizing the limiting part restriction The rotation of rotating shaft utilizes the butt parts with the moving direction quadrature of rotating shaft, thus to block The situation of the propulsive force that produces on the rotating shaft is compared the rotation that little power is come the restricting rotation axle, does not make periphery Damaged or the wearing and tearing of parts limit the parallel of the rotating shaft that piezoelectric actuator has effectively, have Utilizability on the industry.
Claims (4)
1. a control applies voltage to piezoelectric element and makes the rotating shaft rotation, and makes the driving restriction structure of its parallel vertically mobile piezoelectric actuator, it is characterized in that,
The driving restriction structure of described piezoelectric actuator has projecting part and limiting part,
Described projecting part is to outstanding with the direction of the axial quadrature of described rotating shaft, with this rotating shaft one rotation,
Described limiting part limits the rotation of described rotating shaft when described rotating shaft parallel moves to certain position and described projecting part butt.
2. the driving of piezoelectric actuator as claimed in claim 1 restriction structure is characterized in that,
Sky is opened the axial arrangement of two described limiting parts of certain intervals along described rotating shaft.
3. the driving of piezoelectric actuator as claimed in claim 1 or 2 restriction structure is characterized in that,
Described limiting part is integrally formed with the holding member that keeps described piezoelectric actuator.
4. a lens driver is characterized in that,
It has the driving restriction structure of each described piezoelectric actuator in the claim 1～3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP194897/2006 | 2006-07-14 | ||
| JP2006194897 | 2006-07-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101490945A true CN101490945A (en) | 2009-07-22 |
Family
ID=38923212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800262337A Pending CN101490945A (en) | 2006-07-14 | 2007-07-09 | Drive regulation structure of piezoelectric actuator and lens drive equipped with the same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2008007653A1 (en) |
| KR (1) | KR20090027765A (en) |
| CN (1) | CN101490945A (en) |
| WO (1) | WO2008007653A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195517A (en) * | 2010-03-16 | 2011-09-21 | 佳能株式会社 | Vibration wave driving device and manufacture method of vibrating body thereof |
| CN102792378A (en) * | 2010-01-06 | 2012-11-21 | Lg电子株式会社 | An apparatus for processing an audio signal and method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2606771Y2 (en) * | 1993-10-22 | 2001-01-09 | 株式会社ミクニ | Linear motion type stepping motor |
| JP4667646B2 (en) * | 2001-05-31 | 2011-04-13 | 日本電産コパル株式会社 | Camera lens drive device |
| US6940209B2 (en) * | 2003-09-08 | 2005-09-06 | New Scale Technologies | Ultrasonic lead screw motor |
-
2007
- 2007-07-09 CN CNA2007800262337A patent/CN101490945A/en active Pending
- 2007-07-09 JP JP2008524795A patent/JPWO2008007653A1/en not_active Withdrawn
- 2007-07-09 KR KR1020097002494A patent/KR20090027765A/en not_active Application Discontinuation
- 2007-07-09 WO PCT/JP2007/063701 patent/WO2008007653A1/en active Application Filing
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102792378A (en) * | 2010-01-06 | 2012-11-21 | Lg电子株式会社 | An apparatus for processing an audio signal and method thereof |
| CN102792378B (en) * | 2010-01-06 | 2015-04-29 | Lg电子株式会社 | An apparatus for processing an audio signal and method thereof |
| US9042559B2 (en) | 2010-01-06 | 2015-05-26 | Lg Electronics Inc. | Apparatus for processing an audio signal and method thereof |
| US9502042B2 (en) | 2010-01-06 | 2016-11-22 | Lg Electronics Inc. | Apparatus for processing an audio signal and method thereof |
| US9536529B2 (en) | 2010-01-06 | 2017-01-03 | Lg Electronics Inc. | Apparatus for processing an audio signal and method thereof |
| CN102195517A (en) * | 2010-03-16 | 2011-09-21 | 佳能株式会社 | Vibration wave driving device and manufacture method of vibrating body thereof |
| CN102195517B (en) * | 2010-03-16 | 2016-01-13 | 佳能株式会社 | The manufacture method of vibration wave driving device and vibrating body thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008007653A1 (en) | 2008-01-17 |
| JPWO2008007653A1 (en) | 2009-12-10 |
| KR20090027765A (en) | 2009-03-17 |
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Open date: 20090722 |