CN117008282B - Screw-type ultrasonic driving zoom lens and camera - Google Patents
Screw-type ultrasonic driving zoom lens and camera Download PDFInfo
- Publication number
- CN117008282B CN117008282B CN202311233482.0A CN202311233482A CN117008282B CN 117008282 B CN117008282 B CN 117008282B CN 202311233482 A CN202311233482 A CN 202311233482A CN 117008282 B CN117008282 B CN 117008282B
- Authority
- CN
- China
- Prior art keywords
- barrel
- lens barrel
- lens
- transmission piece
- ultrasonic driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 53
- 239000000919 ceramic Substances 0.000 claims description 37
- 229920001971 elastomer Polymers 0.000 claims description 10
- 239000000806 elastomer Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The invention discloses a screw-type ultrasonic driving zoom lens and a camera, which belong to the technical field of zoom lenses, and comprise a base, a first lens barrel, a second lens barrel, a third lens barrel, a transmission piece and an ultrasonic driving device, wherein the first lens barrel, the second lens barrel and the third lens barrel are sequentially connected in a sleeved mode; the transmission piece is meshed with the first internal thread through the first external thread so as to be in threaded connection with the third lens cone; the ultrasonic driving device is meshed with the second internal thread through the second external thread so as to be in threaded connection with the transmission piece; the ultrasonic driving device is used for driving the transmission piece to rotate around the axis of the transmission piece and reciprocate along the axial direction of the first lens barrel so that the transmission piece drives the third lens barrel and the second lens barrel to stretch along the axial direction of the first lens barrel. The threaded ultrasonic driving zoom lens can control the multistage lens barrel by only using one ultrasonic driving device, has a simple structure and a small volume, and meanwhile, the ultrasonic driving device is not subjected to electromagnetic interference, so that the stable zooming of the lens is ensured.
Description
Technical Field
The invention belongs to the technical field of zoom lenses, and particularly relates to a threaded ultrasonic driving zoom lens and a camera.
Background
In real life, most zoom lenses with multi-stage lens barrels are driven by one electromagnetic motor respectively, the whole lens is complex in structure and large in size due to the fact that a plurality of electromagnetic motors are difficult to apply to small electronic equipment, meanwhile, the electromagnetic motors are easy to be subjected to electromagnetic interference due to the fact that windings and magnets are arranged, and therefore transmission of the electromagnetic motors is unstable, and lens zooming is affected.
Accordingly, the prior art is subject to improvement and development.
Disclosure of Invention
The invention aims to provide a threaded ultrasonic driving zoom lens and a camera, wherein one ultrasonic driving device can control a multistage lens barrel, effectively simplify the structure of the lens, and is beneficial to miniaturization of the lens.
In a first aspect, the present invention provides a screw-type ultrasonically driven zoom lens comprising:
a base;
the first lens barrel is fixedly arranged on the base;
the second lens barrel is spliced in the first lens barrel and can reciprocate along the axial direction of the first lens barrel;
the third lens barrel is spliced in the second lens barrel and can reciprocate along the axial direction of the second lens barrel; the inner side wall surface of the third lens barrel is provided with a first internal thread; a lens is arranged at one end of the third lens barrel far away from the base;
the outer side wall surface of the transmission piece is provided with a first external thread, the inner side wall surface of the transmission piece is provided with a second internal thread, and the transmission piece is inserted into the third lens cone and meshed with the first internal thread through the first external thread so as to be in threaded connection with the third lens cone;
the ultrasonic driving device is fixedly arranged on the base and provided with a second external thread, is inserted into the transmission piece and is meshed with the second internal thread through the second external thread so as to be in threaded connection with the transmission piece; the ultrasonic driving device is used for driving the transmission piece to rotate around the axis of the transmission piece and reciprocate along the axial direction of the first lens barrel so that the transmission piece drives the third lens barrel and the second lens barrel to stretch and retract along the axial direction of the first lens barrel.
The threaded ultrasonic driving zoom lens provided by the invention realizes multistage zoom control by utilizing one ultrasonic driving device to cooperate with two threaded pairs for transmission, effectively simplifies the whole structure, reduces the whole volume, and simultaneously can avoid electromagnetic interference and realize stable zooming.
Further, a first groove extending along the axial direction of the first lens barrel is formed in the inner side wall surface of the first lens barrel, one end of the first groove is open, the other end of the first groove is closed, and the open end of the first groove is close to the base; the outer side wall surface of the second lens barrel is provided with a first boss, and the first boss is arranged in the first groove in a sliding mode.
The first groove plays a limiting role on the first boss, so that the second lens barrel is ensured not to be separated from the first lens barrel when moving.
Further, a second groove extending along the axial direction of the second lens barrel is formed in the inner side wall surface of the second lens barrel, and two ends of the second groove are closed; the outer side wall surface of the third lens barrel is provided with a second boss, and the second boss is arranged in the second groove in a sliding mode.
The second groove plays a limiting role on the second boss, so that the third lens barrel is prevented from being separated from the second lens barrel when moving.
Further, the ultrasonic driving device comprises an elastic body and an even number of driving groups, and each driving group comprises two piezoelectric ceramic plates; the elastic body is a hollow cylinder, the second external thread is arranged at the upper end of the elastic body, all the driving groups are uniformly surrounded at the lower end of the elastic body along the circumferential direction of the elastic body, and two piezoelectric ceramic plates in each driving group are oppositely arranged; two piezoelectric ceramic plates in each driving group are used for generating vibration when being excited by an electric signal and exciting the elastic body to generate regular elliptic vibration in cooperation with other driving groups.
Further, a space exists between the piezoelectric ceramic piece and the transmission piece.
The piezoelectric ceramic plate and the transmission piece are ensured to be separated, and short circuit is avoided.
Further, the elastomer is made of an elastic alloy material or a piezoelectric material.
Further, the first lens barrel and the ultrasonic driving device are fixedly connected with the base through a detachable connection mode, and the piezoelectric ceramic plate is fixedly connected with the elastic body through a detachable connection mode.
Further, the first lens barrel and the ultrasonic driving device are fixedly connected with the base through non-detachable connection modes, and the piezoelectric ceramic plate is fixedly connected with the elastic body through non-detachable connection modes.
Further, when the elastomer is made of piezoelectric ceramic, the piezoelectric ceramic plate and the elastomer are integrally formed.
In a second aspect, the present invention provides a camera, including the above-mentioned screw-type ultrasound-driven zoom lens.
From the above, the threaded ultrasonic driving zoom lens provided by the invention has the advantages that the two threaded pairs are matched with one ultrasonic driving device to control the three-stage lens barrel to stretch and retract to realize multi-stage lens zooming, so that the number of the driving devices is greatly reduced, the overall structure is simpler, the size of the lens is smaller, and the adopted ultrasonic driving device is free from windings and magnets, so that the stable zooming of the lens is ensured, and the lens is not influenced by electromagnetic interference resistance.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
Fig. 1 is a cross-sectional view of a screw-type ultrasonic driving zoom lens according to an embodiment of the present invention.
Fig. 2 is an exploded view of a screw-type ultrasonic driving zoom lens according to an embodiment of the present invention.
Fig. 3 is an exploded view of the first barrel, the second barrel, and the third barrel according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an ultrasonic driving device according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a resonant mode in which two piezoelectric ceramic plates vibrate along the y direction in an embodiment of the present invention.
Fig. 6 is a schematic diagram of a resonance mode of vibration along the x-direction generated by two other piezoelectric ceramic plates according to an embodiment of the present invention.
Description of the reference numerals:
100. a base; 200. a first barrel; 210. a first groove; 300. a second barrel; 310. a first boss; 320. a second groove; 400. a third barrel; 410. a second boss; 500. a transmission member; 600. an ultrasonic driving device; 610. an elastomer; 620. piezoelectric ceramic plates.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
Referring to fig. 1 and 2, the present invention provides a screw-type ultrasonic driving zoom lens, comprising:
a base 100;
a first barrel 200, the first barrel 200 being fixedly disposed on the base 100;
the second lens barrel 300 is inserted into the first lens barrel 200 and can reciprocate along the axial direction of the first lens barrel 200;
the third lens barrel 400 is inserted into the second lens barrel 300 and can reciprocate along the axial direction of the second lens barrel 300; the inner side wall surface of the third barrel 400 is provided with a first internal thread; one end of the third lens barrel 400 away from the base 100 is provided with a lens;
the transmission piece 500 is provided with a first external thread on the outer side wall surface and a second internal thread on the inner side wall surface, and the transmission piece 500 is inserted into the third lens cone 400 and meshed with the first internal thread through the first external thread so as to be in threaded connection with the third lens cone 400;
the ultrasonic driving device 600 is fixedly arranged on the base 100 and is provided with a second external thread, and the ultrasonic driving device 600 is inserted into the transmission piece 500 and meshed with the second internal thread through the second external thread so as to be in threaded connection with the transmission piece 500; the ultrasonic driving device 600 is used for driving the transmission member 500 to rotate around the axis thereof and reciprocate along the axial direction of the first barrel 200, so that the transmission member 500 drives the third barrel 400 and the second barrel 300 to retract along the axial direction of the first barrel 200.
In this embodiment, the first lens barrel 200, the second lens barrel 300 and the third lens barrel 400 are sequentially sleeved in layers to form a multi-stage zoom lens, wherein the third lens barrel 400 and the ultrasonic driving device 600 are respectively connected with the transmission member 500 in a threaded manner, and the third lens barrel 400 and the second lens barrel 300 are controlled to be retracted by using two screw pairs.
If the electromagnetic motor is adopted for driving, the transmission member 500 is sleeved on the output shaft of the electromagnetic motor and is in threaded connection with the output shaft, at the moment, the transmission member 500 is equivalent to a driven member, only plays a role in middle transition, and can cause different contact forces to be applied to two screw pairs, so that the transmission member 500 and the output shaft can possibly be locked to cause synchronous rotation of the transmission member 500 and the output shaft, or the transmission member 500 and the third lens barrel 400 can be locked to cause synchronous rotation of the transmission member 500 and the third lens barrel 400, and in this case, the transmission is equivalent to the transmission by only using one screw pair of the transmission member 500, and only the effects of single zoom speed and single zoom distance are achieved;
in this embodiment, the ultrasonic driving device 600 is used for driving, unlike the electromagnetic motor driving, the ultrasonic driving device 600 rotates and moves the transmission member 500 through vibration, at this time, the transmission member 500 is equivalent to a driving member and plays a role of a power source, at this time, the contact forces received by the two screw pairs are the same, so that the locking phenomenon cannot occur, and in this case, the effect of double zoom speed and double zoom distance is achieved by using the two screw pairs of the transmission member 500 for transmission.
In addition, the ultrasonic driving device 600 has the following advantages:
1. the lens has no winding and magnet, does not generate magnetism, has stronger electromagnetic interference resistance, and effectively improves the stability and zoom precision of the zoom control of the lens;
2. the power density can reach 10 times of that of the electromagnetic motor under the same volume;
3. stepless speed change can be realized.
In some embodiments, referring to fig. 3, the inner side wall surface of the first barrel 200 is provided with a first groove 210 extending along the axial direction of the first barrel 200, one end of the first groove 210 is open and the other end is closed, and the open end of the first groove 210 is close to the base 100; the outer side wall of the second barrel 300 is provided with a first boss 310, and the first boss 310 is slidably disposed in the first groove 210.
In the present embodiment, the first groove 210 plays a limiting role on the first boss 310, so as to ensure that the second lens barrel 300 cannot be separated from the first lens barrel 200 when moving.
It should be noted that the second barrel 300 only moves in the axial direction of the first barrel 200 and does not rotate about its own axis.
In some embodiments, referring to fig. 3, the inner side wall surface of the second barrel 300 is provided with a second groove 320 extending along the axial direction of the second barrel 300, and both ends of the second groove 320 are closed; the outer side wall of the third barrel 400 is provided with a second boss 410, and the second boss 410 is slidably disposed in the second groove 320.
In the present embodiment, the second groove 320 plays a limiting role on the second boss 410, so as to ensure that the third lens barrel 400 cannot be separated from the second lens barrel 300 when moving.
It should be noted that the third barrel 400 only moves in the axial direction of the second barrel 300 and does not rotate about its own axis.
In certain embodiments, referring to fig. 1, 2 and 4, the ultrasonic drive apparatus 600 comprises an elastomer 610 and an even number of drive-groups, each drive-group comprising two piezoceramic sheets 620; the elastic body 610 is a hollow cylinder, the second external thread is arranged at the upper end of the elastic body 610, all the driving groups are uniformly surrounded at the lower end of the elastic body 610 along the circumferential direction of the elastic body 610, and two piezoelectric ceramic plates 620 in each driving group are oppositely arranged; the two piezoceramic sheets 620 in each drive-group are configured to vibrate when excited by an electrical signal and to excite the elastomer 610 in coordination with the other drive-groups to produce regular elliptical vibration.
In this embodiment, the piezoelectric ceramic plate 620 excites the resonance mode under the excitation of the electrical signal, so that the piezoelectric ceramic plate 620 generates high-frequency vibration (the amplitude is in micro-nano level) along a certain direction, and the second external thread on the elastic body 610 exhibits regular vibration in cooperation with the vibration of other piezoelectric ceramic plates 620, and the vibration track is a lissajous ellipse, and under this vibration track, the elastic body 610 can drive the transmission member 500 to rotate around its own axis and move along the axial direction of the first lens barrel 200.
Specifically, referring to fig. 4, 5 and 6, for example, the ultrasonic driving device 600 includes an elastic body 610 and 2 driving groups, and when a first electric signal is input to the two piezoelectric ceramic plates 620 in the y direction, the two piezoelectric ceramic plates 620 in the y direction generate a resonance mode vibrating in the y direction; when the second electric signal is input to the two piezoelectric ceramic pieces 620 in the x direction, the two piezoelectric ceramic pieces 620 in the x direction generate a resonance mode vibrating in the x direction; the y direction is perpendicular to the x direction, and when there is a phase difference of ± pi/2 between the first electrical signal and the second electrical signal (the amplitude and the frequency of the first electrical signal are the same, the first electrical signal and the second electrical signal may be sine waves, saw tooth waves or square waves), the motion track of the second external thread on the elastic body 610 can be a lissajous ellipse (this is a theoretical knowledge of vibration and will not be described herein).
When the ultrasonic driving device 600 includes a plurality of driving groups, for example, 4 driving groups, 6 driving groups, 8 driving groups, etc., if the direction in which any one driving group generates vibration is perpendicular to the direction in which the other driving group generates vibration, and if there is a ±pi/2 phase difference between the electric signals of the two driving groups perpendicular to each other, the motion trace of the second external thread on the elastic body 610 can be made to be a lissajous ellipse (this is a theoretical knowledge of vibrology, and will not be described here).
In addition, the ultrasonic driving apparatus 600 of the present embodiment has the following advantages:
1. the vibration frequency is outside the audible range (> 20 kHz) and the user is not affected by noise;
2. the elastic body 610 is in threaded connection with the transmission piece 500, when the ultrasonic driving device 600 operates, the friction force of the thread pair is used as a driving force to realize a stepless zooming function, and when the ultrasonic driving device 600 stops operating, the friction force of the thread pair is used as a self-locking force to realize a power-off self-locking function;
3. the response speed, the starting speed and the braking speed are all in millisecond level;
4. the displacement resolution reaches the nanometer level, and high-precision zooming is realized;
5. a transmission part such as a speed reducer, a gear and the like is not required to be arranged;
6. the structure is simple, and the volume is small;
7. the zooming speed is high, and the zooming distance is long;
8. can work in strong magnetic field, nuclear radiation, high temperature, low temperature, drying, wetting and other environments, and has good environmental adaptability.
It should be noted that, the first barrel 200, the second barrel 300, the third barrel 400, and the elastic body 610 all belong to hollow cylinders, and the base 100 is provided with a light-passing hole, so that light can be transmitted through the lenses and pass through the first barrel 200, the second barrel 300, the third barrel 400, the elastic body 610, and the base 100.
In some embodiments, a space exists between the piezoelectric ceramic 620 and the actuator 500 to ensure that the piezoelectric ceramic 620 is spaced from the actuator 500 to avoid causing a short circuit.
In some embodiments, the elastic body 610 is made of an elastic alloy material or a piezoelectric material, and the elastic alloy material is used for making the elastic body 610, so that the elastic body 610 has deformability, and the elastic body 610 can bear high-frequency vibration, thereby being beneficial to prolonging the whole service life; the piezoelectric material is, for example, piezoelectric ceramic, and excites a resonance mode when excited by an electrical signal, and cooperates with the piezoelectric ceramic plate 620 to perform a driving function, so that the second external thread presents regular motion.
In some embodiments, the first lens barrel 200 and the ultrasonic driving device 600 are fixedly connected to the base 100 through a detachable connection manner, and the piezoelectric ceramic plate 620 is fixedly connected to the elastic body 610 through a detachable connection manner, and the detachable connection manner includes, but is not limited to, screw connection, threaded connection, snap connection, and the like.
In some embodiments, the first lens barrel 200 and the ultrasonic driving device 600 are fixedly connected to the base 100 through a non-detachable connection method, and the piezoelectric ceramic plate 620 is fixedly connected to the elastic body 610 through a non-detachable connection method, wherein the non-detachable connection method includes, but is not limited to, adhesive connection, welding connection, and the like.
In some embodiments, when the material of the elastomer 610 is piezoceramic, the piezoceramic sheet 620 is integrally formed with the elastomer 610.
Compared with the mode of bonding connection and welding connection, the piezoelectric ceramic piece 620 is fixed on the elastic body 610, the elastic body 610 and the piezoelectric ceramic piece 620 are integrally formed to have higher fixing strength, the piezoelectric ceramic piece 620 can be prevented from being separated from the elastic body 610 when vibrating at high frequency, and meanwhile, the vibration of the piezoelectric ceramic piece 620 can be prevented from being influenced by the adhesive used for bonding connection and welding spots formed by welding connection.
The invention also provides a camera comprising the threaded ultrasonic driving zoom lens in the embodiment.
The ultrasonic driving device 600 in the screw-type ultrasonic driving zoom lens is surrounded by the first lens barrel 200, the second lens barrel 300 and the third lens barrel 400, the structural integration degree is higher, a large amount of space is saved, and the use of the driving device can be reduced by adopting a double-screw pair transmission mode, so that the whole structure is simpler, the size is smaller, the camera miniaturization is facilitated, meanwhile, the high-precision screw pair is matched with the high-precision ultrasonic driving device 600 to greatly improve the focusing precision and focusing stability of the camera, so that the camera can be suitable for equipment with higher integration degree requirements (such as a mobile phone, a tablet personal computer and the like), or be applied to precision equipment (such as an endoscope, a microscope and the like).
In the description of the present specification, reference to the terms "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
What has been described above is merely some embodiments of the present invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention.
Claims (9)
1. A screw-type ultrasonically driven zoom lens, comprising:
a base (100);
a first lens barrel (200), the first lens barrel (200) being fixedly disposed on the base (100);
a second barrel (300), the second barrel (300) being inserted into the first barrel (200) and being capable of reciprocating in an axial direction of the first barrel (200);
a third barrel (400), the third barrel (400) being inserted into the second barrel (300) and being capable of reciprocating in an axial direction of the second barrel (300); the inner side wall surface of the third lens barrel (400) is provided with a first internal thread; a lens is arranged at one end of the third lens barrel (400) far away from the base (100);
the transmission piece (500), the outer side wall surface of the transmission piece (500) is provided with a first external thread, the inner side wall surface of the transmission piece (500) is provided with a second internal thread, the transmission piece (500) is inserted into the third lens barrel (400) and is meshed with the first internal thread through the first external thread so as to be in threaded connection with the third lens barrel (400);
an ultrasonic driving device (600), wherein the ultrasonic driving device (600) is fixedly arranged on the base (100) and is provided with a second external thread, the ultrasonic driving device (600) is inserted into the transmission piece (500) and meshed with the second internal thread through the second external thread so as to be in threaded connection with the transmission piece (500); the ultrasonic driving device (600) is used for driving the transmission piece (500) to rotate around the axis of the transmission piece and reciprocate along the axial direction of the first lens barrel (200) so that the transmission piece (500) drives the third lens barrel (400) and the second lens barrel (300) to stretch along the axial direction of the first lens barrel (200);
the ultrasonic drive device (600) comprises an elastomer (610) and an even number of drive groups, each drive group comprising two piezoelectric ceramic plates (620); the elastic body (610) is a hollow cylinder, the second external thread is arranged at the upper end of the elastic body (610), all the driving groups are uniformly surrounded at the lower end of the elastic body (610) along the circumferential direction of the elastic body (610), and two piezoelectric ceramic plates (620) in each driving group are oppositely arranged; two of the piezoceramic sheets (620) in each of the drive groups are configured to vibrate when excited by an electrical signal and excite the elastomer (610) in coordination with the other drive groups to produce a regular elliptical vibration.
2. The screw-type ultrasonic-driven zoom lens according to claim 1, wherein an inner side wall surface of the first barrel (200) is provided with a first groove (210) extending in an axial direction of the first barrel (200), one end of the first groove (210) is open and the other end is closed, and the open end of the first groove (210) is close to the base (100); the outer side wall surface of the second lens barrel (300) is provided with a first boss (310), and the first boss (310) is slidably arranged in the first groove (210).
3. The screw-type ultrasonic-driven zoom lens according to claim 2, wherein an inner side wall surface of the second barrel (300) is provided with a second groove (320) extending in an axial direction of the second barrel (300), both ends of the second groove (320) being closed; the outer side wall surface of the third lens barrel (400) is provided with a second boss (410), and the second boss (410) is slidably arranged in the second groove (320).
4. The screw-type ultrasonically driven zoom lens of claim 1, wherein a space exists between the piezoelectric ceramic plate (620) and the transmission member (500).
5. The screw-type ultrasonically driven zoom lens as claimed in claim 1, wherein the elastic body (610) is made of an elastic alloy material or a piezoelectric material.
6. The screw-type ultrasonic driving zoom lens according to claim 1, wherein the first barrel (200) and the ultrasonic driving device (600) are both fixedly connected with the base (100) by a detachable connection manner, and the piezoelectric ceramic plate (620) is fixedly connected with the elastic body (610) by a detachable connection manner.
7. The screw-type ultrasonic driving zoom lens according to claim 5, wherein the first barrel (200) and the ultrasonic driving device (600) are both fixedly connected to the base (100) by a non-detachable connection, and the piezoelectric ceramic plate (620) is fixedly connected to the elastic body (610) by a non-detachable connection.
8. The screw-type ultrasonic-driven zoom lens according to claim 7, wherein when the elastic body (610) is made of piezoelectric ceramic, the piezoelectric ceramic plate (620) is integrally formed with the elastic body (610).
9. A camera comprising the screw-type ultrasonically driven zoom lens according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311233482.0A CN117008282B (en) | 2023-09-22 | 2023-09-22 | Screw-type ultrasonic driving zoom lens and camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311233482.0A CN117008282B (en) | 2023-09-22 | 2023-09-22 | Screw-type ultrasonic driving zoom lens and camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117008282A CN117008282A (en) | 2023-11-07 |
| CN117008282B true CN117008282B (en) | 2024-02-20 |
Family
ID=88562042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311233482.0A Active CN117008282B (en) | 2023-09-22 | 2023-09-22 | Screw-type ultrasonic driving zoom lens and camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117008282B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1879232A (en) * | 2003-09-08 | 2006-12-13 | 新测量科技有限公司 | Ultrasonic lead screw motor |
| CN102097971A (en) * | 2009-12-15 | 2011-06-15 | 精拓丽音科技（北京）有限公司 | Piezoelectric ceramic driver for optical focusing and zooming of mobile phone |
| CN114886389A (en) * | 2022-07-14 | 2022-08-12 | 之江实验室 | Three-dimensional photoacoustic/ultrasonic dual-mode endoscope and imaging method |
-
2023
- 2023-09-22 CN CN202311233482.0A patent/CN117008282B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1879232A (en) * | 2003-09-08 | 2006-12-13 | 新测量科技有限公司 | Ultrasonic lead screw motor |
| CN102097971A (en) * | 2009-12-15 | 2011-06-15 | 精拓丽音科技（北京）有限公司 | Piezoelectric ceramic driver for optical focusing and zooming of mobile phone |
| CN114886389A (en) * | 2022-07-14 | 2022-08-12 | 之江实验室 | Three-dimensional photoacoustic/ultrasonic dual-mode endoscope and imaging method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117008282A (en) | 2023-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101300730B (en) | Comprise the mechanism of ultrasound waveguide screw motor | |
| Henderson | Simple ceramic motor... inspiring smaller products | |
| US20080247059A1 (en) | Miniature Piezoelectric Motor and Method of Driving Elements Using Same | |
| EP1959511A1 (en) | A thread driven polyhedron ultrasonic motor | |
| JP2012500618A (en) | Reduced voltage linear motor system and method | |
| EP2216837A1 (en) | Piezoelectric motor | |
| JP2004320846A (en) | Vibration-type drive unit | |
| KR20070062930A (en) | Ultrasonics actuator, driving method thereof, lens driver and portable device | |
| KR100891851B1 (en) | A Stator and Piezo Ultrasonic Motor Having it | |
| CN117008282B (en) | Screw-type ultrasonic driving zoom lens and camera | |
| Delibas et al. | L1B2 piezo motor using D33 effect | |
| Ci et al. | A square-plate piezoelectric linear motor operating in two orthogonal and isomorphic face-diagonal-bending modes | |
| US8044554B2 (en) | Ultrasonic motor and manufacturing method of the same | |
| CN102005965B (en) | Ultrasonic motor driven by single-phase power supply | |
| CN103023373A (en) | Two-freedom-degree rotation-line motion micro ultrasonic motor | |
| CN109378995B (en) | High-frequency resonance piezoelectric inertia driving linear displacement platform | |
| CN113114065B (en) | Longitudinal bending mode compounded piezoelectric ultrasonic motor for micro-device and driving method thereof | |
| Bansevicius et al. | Multi-degree-of-freedom ultrasonic motors for mass-consumer devices | |
| JP4641709B2 (en) | Ultrasonic motor using laminated piezoelectric vibrator and electronic device using the same | |
| CN214674947U (en) | Piezoelectric motor, camera driving device and camera | |
| JP4485238B2 (en) | Ultrasonic motor and electronic device with ultrasonic motor | |
| CN109639177B (en) | SMD linear ultrasonic motor based on 3D printing resin stator | |
| Zhou et al. | Integrated lens auto-focus system driven by a nut-type ultrosonic motor (USM) | |
| CN214429470U (en) | Longitudinal-bending mode composite piezoelectric ultrasonic motor for micro-miniature equipment | |
| CN114244181B (en) | High-power-density piezoelectric driver and piezoelectric motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |