CN113485056B - Retractable zoom lens capable of being pressed and retracted - Google Patents
Retractable zoom lens capable of being pressed and retracted Download PDFInfo
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- CN113485056B CN113485056B CN202110755025.2A CN202110755025A CN113485056B CN 113485056 B CN113485056 B CN 113485056B CN 202110755025 A CN202110755025 A CN 202110755025A CN 113485056 B CN113485056 B CN 113485056B
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- 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
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- 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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/04—Bodies collapsible, foldable or extensible, e.g. book type
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- 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
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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- General Physics & Mathematics (AREA)
- Lens Barrels (AREA)
Abstract
The invention discloses a telescopic zoom lens capable of being pressed and retracted, which comprises a shell, a first zoom assembly, a transmission structure and a first driving structure, wherein a mounting channel is formed in the shell; the first zoom assembly is arranged in the mounting channel and comprises a first zoom lens barrel, and the position of the first zoom lens barrel along the depth direction of the mounting channel is adjustable; the transmission structure comprises a first gear and a transmission wheel which can be in transmission coupling, and the first gear is in driving connection with the first zoom lens barrel; the first driving structure is in driving connection with the driving wheel; when the first driving structure drives the driving wheel to rotate, the first gear can synchronously rotate with the driving wheel; when the first zoom lens barrel is retracted and moved by external force, the first gear and the driving wheel can rotate relatively.
Description
Technical Field
The invention relates to the technical field of optical lenses, in particular to a retractable zoom lens capable of being pressed and retracted.
Background
Currently, mobile phones sold in the market are all provided with a plurality of optical photographing modules, an optical system of a traditional mobile phone photographing module is designed into a fixed focus mode, and a zoom module with a movable lens group is developed in sequence. The thickness of the mobile phone is limited to a certain extent, so that the moving range of the movable lens is limited relatively, in order to overcome the defect that the moving range of the movable lens group is limited by the thickness of the mobile phone, research and development personnel put forward a zoom lens with a periscope structure, but in the zoom lens with the periscope structure, the diameter of the lens is limited by the thickness of the mobile phone, so that the diameter of the lens is smaller, the light inlet flux of the zoom optical module is reduced, and the imaging quality is influenced. It is a technical problem that needs to be solved at present to develop a zoom lens with high imaging quality.
Disclosure of Invention
The invention mainly aims to provide a telescopic zoom lens capable of being pressed and retracted, the focal length is adjusted in a telescopic mode, the limitation of the thickness of a mobile phone is avoided, but the whole thickness of the mobile phone after the lens stretches out is larger than the thickness of the mobile phone in the shooting process, for example, in a place with dense crowd or narrow space, the whole thickness of the mobile phone is easy to collide and scratch, and damage is caused, so that the mobile phone is required to have the function of collision and retraction.
In order to achieve the above object, the present invention provides a retractable zoom lens capable of being pushed and retracted, comprising:
a housing having a mounting channel formed therein;
the first zoom assembly is arranged in the mounting channel and comprises a first zoom lens barrel, and the position of the first zoom lens barrel along the depth direction of the mounting channel is adjustable;
the transmission structure comprises a first gear and a transmission wheel which can be in transmission coupling, and the first gear is in driving connection with the first zoom lens barrel; the method comprises the steps of,
the first driving structure is in driving connection with the driving wheel;
when the first driving structure drives the driving wheel to rotate, the first gear can synchronously rotate with the driving wheel;
when the first zoom lens barrel is retracted and moved by external force, the first gear and the driving wheel can rotate relatively.
Optionally, the first gear and the driving wheel are oppositely arranged along the depth direction of the mounting channel, the end surface of the first gear facing the driving wheel is provided with a plurality of clamping grooves, and the clamping grooves are arranged at intervals along the circumferential direction;
the driving wheel is correspondingly provided with a plurality of clamping protrusions, and the clamping protrusions can be respectively and correspondingly clamped and installed in the clamping grooves.
Optionally, the transmission structure further comprises a connecting shaft extending along the depth direction of the mounting channel, and the connecting shaft is fixedly mounted on the inner wall surface of the shell;
the first gear rotates and the driving wheel sequentially rotates and sleeves the outer surface of the connecting shaft.
Optionally, an installation groove is formed in the end face, away from the driving wheel, of the first gear;
the transmission structure further includes:
the clamp spring is fixedly arranged on the connecting shaft and is positioned at one side of the first gear, which is away from the driving wheel; the method comprises the steps of,
the pre-tightening spring is positioned in the mounting groove, and two ends of the pre-tightening spring are respectively propped against the clamp spring and the bottom wall surface of the mounting groove.
Optionally, the driving wheel is a worm wheel;
the first driving structure further includes:
a driving motor; the method comprises the steps of,
one end of the worm is in driving connection with the driving motor, and the other end of the worm is meshed with the worm wheel.
Optionally, the retractable zoom lens further includes a driving barrel rotatably and adjustably mounted in the mounting channel, and a first transmission mechanism is disposed between the first zoom lens barrel and the driving barrel, and the first transmission mechanism is used for converting rotation of the driving barrel into movement of the first zoom lens barrel along a depth direction of the mounting channel;
the outer surface of the driving cylinder is provided with a rack, and the rack is matched with the first gear to synchronously rotate with the first gear.
Optionally, the driving cylinder and the first gear are arranged at intervals along the depth direction of the mounting channel;
and a connecting gear is arranged between the driving cylinder and the first gear, and the connecting gear is respectively meshed with the rack and the first gear.
Optionally, the first transmission mechanism includes a plurality of drive chute and a plurality of drive post that mutually support, each drive chute with the depth direction of installation passageway is the slope setting, and a plurality of drive chute sets up along circumference interval on the inner wall surface of actuating cylinder, a plurality of the drive post corresponds the setting and is in the outer wall surface of first zoom lens cone, so that when actuating cylinder rotates, drive first zoom lens cone is followed the depth direction of installation passageway removes.
Optionally, a second transmission mechanism is arranged between the shell and the driving cylinder, the second transmission mechanism comprises a plurality of sliding chute and a plurality of sliding columns which are matched with each other, each sliding chute and the depth direction of the installation channel are obliquely arranged, a plurality of sliding chute are arranged on the inner wall surface of the shell along the circumferential interval, and a plurality of sliding columns are correspondingly arranged on the outer wall surface of the driving cylinder.
According to the technical scheme, an installation channel is formed in the shell, a first zooming component is arranged in the installation channel, the first zooming component can be matched with other lenses to achieve a zooming function, in the normal use process, the first driving structure drives the transmission structure to rotate, at the moment, the transmission wheel drives the first gear to synchronously rotate, at the moment, the extension and retraction of the lens can be controlled on the mobile phone, in the process that the lens extends to take a picture, when the lens is pressed by external force, the first zooming lens barrel is retracted, the first gear is driven to reversely rotate, at the moment, the first driving structure does not receive a control instruction, and is in a static state, and the transmission wheel connected with the first zooming lens barrel is also in a static state, in the first gear reversing process, the coupling states of the first gear and the transmission wheel are separated, at the moment, the first gear can idle, and therefore, after the first zooming lens barrel is pressed by external force, the user can automatically retract for a certain distance under the condition that the lens is not controlled, and the protection effect is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of an embodiment of a retractable zoom lens according to the present invention;
FIG. 2 is a schematic cross-sectional view of the second zoom assembly of FIG. 1 in an extended state;
FIG. 3 is a perspective view of the first barrel and the second barrel of FIG. 1 mated;
fig. 4 is a schematic perspective view of the transmission structure of fig. 1
FIG. 5 is a schematic cross-sectional view of the transmission structure of FIG. 4;
FIG. 6 is a schematic perspective view of the first gear of FIG. 4;
FIG. 7 is a schematic perspective view of the drive wheel of FIG. 4;
FIG. 8 is a partial perspective view of the housing of FIG. 1;
fig. 9 is a perspective view of the first zoom lens barrel of fig. 1;
FIG. 10 is a schematic perspective view of the actuator cylinder (one embodiment) of FIG. 1;
fig. 11 is a perspective view of the drive cylinder (another embodiment) of fig. 1.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the case where a directional instruction is involved in the embodiment of the present invention, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Because of the scalability, the overall thickness of the telescopic zoom lens is larger than that of the mobile phone after the lens stretches out in the shooting process of the mobile phone, such as in a place with dense crowd or narrow space, so that the mobile phone is easy to collide and scratch, damage is caused, and the mobile phone is required to have the collision retraction function.
In view of the above, the present invention provides a retractable zoom lens capable of automatically retracting a distance when the lens is subject to external force, and fig. 1 to 11 are views showing embodiments of the retractable zoom lens.
Referring to fig. 4 to 5, the retractable zoom lens 100 includes a housing 1, a first zoom assembly, a transmission structure 4, and a first driving structure, wherein a mounting channel is formed in the housing 1; the first zoom assembly is arranged in the mounting channel, the first zoom assembly comprises a first zoom lens barrel 21, and the position of the first zoom lens barrel 21 along the depth direction of the mounting channel is adjustable; the transmission structure 4 comprises a first gear 41 and a transmission wheel 42 which can be in transmission coupling, and the first gear 41 is in driving connection with the first zoom lens barrel 21; the first driving structure is in driving connection with the driving wheel 42; when the first driving structure drives the driving wheel 42 to rotate, the first gear 41 can rotate synchronously with the driving wheel 42; when the first zoom lens barrel 21 is retracted and moved by an external force, the first gear 41 and the driving wheel 42 can rotate relatively.
According to the technical scheme of the invention, a mounting channel is formed in the shell 1, a first zooming component is arranged in the mounting channel, the first zooming component can be matched with other lenses to realize zooming function, in the normal use process, the first driving structure drives the transmission structure 4 to rotate, at the moment, the transmission wheel 42 drives the first gear 41 to synchronously rotate, at the moment, the extension and retraction of a lens can be controlled on a mobile phone, in the process of extending and photographing the lens, when the lens is pressed by external force, the first zooming lens barrel 21 is retracted, the first gear 41 is driven to reversely rotate, at the moment, the first driving structure does not receive a control instruction, and at the moment, the first driving structure is in a static state, and the transmission wheel 42 connected with the first zooming lens barrel is also in a static state, in the reverse rotation process of the first gear 41, at the moment, the first gear 41 can synchronously rotate, at the moment, the first gear 41 can automatically retract for a certain distance under the condition that a user does not control after receiving the external force, so that the first zooming lens barrel 21 can realize protection.
Further, the present invention is not limited to the coupling connection manner between the first gear 41 and the driving wheel 42, in this embodiment, the first gear 41 and the driving wheel 42 are disposed opposite to each other along the depth direction of the installation channel, the end surface of the first gear 41 facing the driving wheel 42 is provided with a plurality of slots 411, and the plurality of slots 411 are disposed at intervals along the circumferential direction; the driving wheel 42 is correspondingly provided with a plurality of clamping protrusions 421, and the plurality of clamping protrusions 421 can be respectively and correspondingly clamped and mounted in the plurality of clamping slots 411. Under the natural state, the clamping convex 421 and the clamping slot 411 are buckled and connected, so that the first gear 41 and the driving wheel 42 can synchronously rotate, when the first gear 41 and the driving wheel 42 are retracted and moved by external force, the clamping convex 421 is separated from the clamping slot 411, the first gear 41 can idle, the arrangement mode is simple in structure, the design requirement can be met, the clamping convex 421 and the clamping slot 411 can be finely adjusted through corresponding driving structures when the clamping convex 421 and the clamping slot 411 need to be buckled again after being misplaced, the clamping convex 421 is identical, the clamping slots 411 are identical, the clamping convex 421 and the clamping slots 411 are not specified during matching, and the clamping convex 421 can be moved to be matched with each clamping slot 411.
It should be noted that, in other embodiments, other ejecting structures may be provided to enable the relative rotation between the first gear 41 and the driving wheel 42, which will not be described in detail again.
In order to facilitate the guiding of the movement between the first gear 41 and the driving wheel 42, the driving structure 4 further comprises a connecting shaft 43 extending along the depth direction of the mounting channel, wherein the connecting shaft 43 is fixedly mounted on the inner wall surface of the housing 1; the first gear 41 rotates and the driving wheel 42 sequentially rotates and is sleeved on the outer surface of the connecting shaft 43. The connecting shaft 43 enables the two to rotate along the same axis all the time, so that the coaxial effect is ensured.
Since there are two states between the first gear 41 and the driving wheel 42, in this embodiment, an installation groove 412 is provided on an end surface of the first gear 41 facing away from the driving wheel 42; the transmission structure 4 further comprises a clamp spring 44 and a pre-tightening spring 45, wherein the clamp spring 44 is fixedly arranged on the connecting shaft 43 and is positioned at one side of the first gear 41 away from the transmission wheel 42; the pre-tightening spring 45 is located in the mounting groove 412, and two ends of the pre-tightening spring 45 respectively abut against the snap spring 44 and the bottom wall surface of the mounting groove 412. When the locking protrusion 421 and the locking slot 411 are in the corresponding locked state, the first gear 41 always has a pressing force towards the driving wheel 42 under the cooperation of the clamp spring 44 and the pre-tightening spring 45, so as to ensure the relative position of the two.
In order to make the structure more compact and occupy less space, the first driving structure may be placed horizontally when being arranged, and in particular, the driving wheel 42 is a worm wheel; the first driving structure further comprises a driving motor and a worm, one end of the worm is in driving connection with the driving motor, the other end of the worm is meshed with the worm wheel, and transmission of driving force in different directions is achieved through the mode that the worm wheel and the worm are mutually matched.
In order to realize the driving of the first zoom lens barrel 21, the retractable zoom lens 100 further includes a driving barrel 5, the driving barrel 5 is rotatably and adjustably mounted in the mounting channel, and a first transmission mechanism is provided between the first zoom lens barrel 21 and the driving barrel 5, and the first transmission mechanism is used for converting the rotation of the driving barrel 5 into the movement of the first zoom lens barrel 21 along the depth direction of the mounting channel; wherein, the outer surface of the driving cylinder 5 is provided with a rack 51, and the rack 51 is matched with the first gear 41 to rotate synchronously with the first gear 41. The form of the cooperation of the driving cylinder 5 and the first transmission mechanism is beneficial to reducing driving devices and simplifying complex structures.
Since there may be a certain distance between the driving cylinder 5 and the first gear 41 in terms of space layout, in one embodiment of the present invention, the driving cylinder 5 and the first gear 41 are spaced apart in the depth direction of the installation channel; a connection gear 46 is provided between the driving cylinder 5 and the first gear 41, and the connection gear 46 is engaged with the rack 51 and the first gear 41, respectively. The connecting gear 46 is a cylindrical gear, which is higher than the first gear 41, mainly for the purpose of using the drive cylinder 5 and the first drive structure also spatially distant.
The present invention is not limited to the implementation form of the first transmission mechanism, and the first transmission mechanism may be driven by an internal and external screw thread matching manner or a cam mechanism manner, in this embodiment, the first transmission mechanism includes a plurality of driving chute 61 and a plurality of driving columns 62 that are mutually matched, each driving chute 61 is obliquely disposed with the depth direction of the installation channel, the plurality of driving chute 61 is circumferentially disposed on the inner wall surface of the driving barrel 5 at intervals, and the plurality of driving columns 62 are correspondingly disposed on the outer wall surface of the first zoom lens barrel 21, so that when the driving barrel 5 rotates, the first zoom lens barrel 21 is driven to move along the depth direction of the installation channel. When the driving cylinder 5 rotates, the driving column 62 slides in the driving chute 61 to drive the first zoom lens barrel 21 to move through the driving column 62, and in order to enhance the stability of the first zoom lens barrel 21 moving along the depth direction of the mounting channel, the driving chute 61 and the driving column 62 are provided with a plurality of groups, and the invention does not limit that the specific shape of the driving column 62 can be cylindrical or square, and the driving chute 61 is correspondingly arranged.
Further, a second transmission mechanism is arranged between the housing 1 and the driving cylinder 5, the second transmission mechanism includes a plurality of sliding chute 71 and a plurality of sliding columns 72 that are mutually matched, each sliding chute 71 is obliquely arranged with the depth direction of the installation channel, a plurality of sliding chute 71 are circumferentially arranged on the inner wall surface of the housing 1 at intervals, and a plurality of sliding columns 72 are correspondingly arranged on the outer wall surface of the driving cylinder 5. When the driving barrel 5 rotates, the slide post 72 slides in the slide chute 71 so that the driving barrel 5 moves in the installation channel depth direction, that is, when the driving barrel 5 rotates, the driving barrel 5 can move in the installation channel depth direction, and the first zoom lens barrel 21 also moves in the installation channel depth direction, the total movement stroke is larger, and a larger zoom magnification can be obtained.
The inclination of the slide chute 71 is linear or nearly linear.
Since the holding force of the driving motor itself is transmitted to the driving cylinder 5 through the gear train and becomes large, if the driving motor is forcibly pressed, the sliding column 72 and the corresponding sliding groove of the first zoom lens barrel 21 are firstly damaged, compared with the prior art, by arranging the transmission structure 4, after a certain degree of force is applied, the first gear 41 and the transmission wheel 42 are separated, the holding force of the driving motor cannot be transmitted to the driving cylinder 5, meanwhile, the first zoom assembly and the second zoom assembly are both made into linear movement parts, and when the first zoom assembly is pressed and retracted by external force, the second zoom assembly can be simultaneously forced to return to the compressed state position.
Referring to fig. 1 to 2, the first zoom assembly includes a first zoom lens barrel and a first zoom lens disposed in the first zoom lens barrel, the retractable telescopic zoom lens 100 further includes a second zoom assembly, the second zoom assembly is disposed at an inner side of the first zoom lens barrel, the second zoom assembly includes a first lens group and a second lens group disposed along a depth direction of the mounting channel at intervals, the first lens group includes a first lens barrel and at least one first lens disposed in the first lens barrel, the second lens group includes a second lens barrel and at least one second lens disposed in the second lens barrel, the first lens barrel is movably mounted to the second lens barrel along the depth direction of the mounting channel, the second lens barrel is disposed along a depth direction of the mounting channel, a mounting channel is formed in the housing, the first zoom assembly and the second zoom assembly are sequentially disposed from a side end of the object to a side end of the image side end, the first zoom assembly and the second zoom assembly are disposed in the first lens group and the second lens group, and the second lens group are capable of moving in a larger distance than the first lens group and the second lens group.
The optical structure requires that the first lens group and the second lens group are separated by a certain distance, and the two parts are overlapped when the lenses are in the compressed state, so in an embodiment, referring to fig. 2 to 3, the first zoom lens barrel 21 can move along the mounting channel until the inner upper wall surface thereof abuts against the first lens barrel 311; the second zoom assembly further includes at least one compression spring 33, and the upper and lower ends of the compression spring 33 respectively abut against the first lens barrel 311 and the second lens barrel 321. When in a compressed state, the first zoom lens barrel 21 abuts against the first lens barrel 311, so that the compression spring is pressed, the first lens barrel 311 is attached to the second lens barrel 321, in the process of extending the lens, the first zoom lens barrel 21 moves towards the object side end under the driving force, the compression spring 33 gradually rebounds, at this time, relative displacement occurs between the second lens barrel 321 and the first lens barrel 311 under the influence of the first zoom lens, after the compression spring 33 is fully extended, at this time, the first lens barrel 311 and the second lens barrel 321 are at the maximum distance which can be achieved in the focusing process, the first lens barrel 311 and the second lens barrel 321 are kept relatively stable, and when the second zoom assembly is driven to move, the first lens barrel 311 and the second lens barrel 321 synchronously move, so that the arrangement structure is simple, and the occupied space is small.
In other embodiments, an ejecting structure is provided between the first lens group and the second lens group so that the first lens group 311 can be displaced relative to the second lens group 321, and the ejecting structure may be implemented in a form of a spring plate or a disc spring and a cylinder, which are not described in detail herein.
Further, in the process of ejecting the first lens barrel 311 by the compression spring 33, in order to ensure the stable moving stroke, at least one protruding column 341 is protruding on the outer side surface of the first lens barrel 311, and a guiding hole extending along the depth direction of the mounting channel is formed through the protruding column 341; a guide post 342 is disposed on the second lens barrel 321 corresponding to the guide hole, and the guide post 342 is disposed in the guide hole in a penetrating manner; wherein the compression spring 33 is sleeved on the outer surface of the guide post 342. The guide post 342 and the guide hole limit the linear movement track of the first barrel 311 relative to the second barrel 321, and the compression spring 33 is arranged on the outer surface of the boss 341, so that the structure is more compact, and the position of the compression spring 33 is limited to prevent the compression spring 33 from falling off.
It should be noted that, the guide posts 342, the guide holes, and the protruding posts 341 are disposed in a plurality of one-to-one correspondence; the at least one compression spring 33 is sleeved on one of the protruding columns 341. Reasonably arranged according to the actual size requirement to ensure stability.
In other embodiments, in order to limit the position of the compression spring 33, a limiting groove 3211 is provided on the second lens barrel 321 corresponding to the compression spring 33; the lower end of the compression spring 33 extends into the limit groove 3211 and abuts against the bottom wall surface of the limit groove 3211. Thereby preventing the compression spring 33 from falling off from between the first barrel 311 and the second barrel 321 during compression and extension.
In order to limit the relative displacement between the first lens barrel 311 and the second lens barrel 321, the second zoom assembly further comprises a limiting structure 35, wherein the limiting structure 35 comprises a limiting column 351 and a limiting frame, and the limiting column 351 is arranged on the outer wall surface of the first lens barrel 311; the limiting frame comprises two supporting arms 3521 and a connecting arm 3522 connecting one side of the two supporting arms 3521 facing the object side end, and one side of the two supporting arms 3521 facing the image side end is fixedly mounted on the second lens barrel 321; the limiting post 351 is located between the two supporting arms 3521, and the limiting post 351 moves to abut against the connecting arm 3522 to limit the movement stroke of the first lens barrel 311 toward the object side end. That is, when the compression spring 33 rebounds to the point where the first barrel 311 and the connecting arm 3522 abut, the maximum stroke is reached.
Moreover, through holes extending along the depth direction of the mounting channel are formed in the limiting posts 351 in a penetrating manner; the limiting structure 35 further includes a guide rod 353, the guide rod 353 is located between the two support arms 3521, one end of the guide rod 353 is connected to the second lens barrel 321, and the other end of the guide rod 353 passes through the through hole and is connected to the connecting arm 3522. The guide 353 is provided to limit the linear stroke of the first barrel 311.
It should be noted that, the limiting posts 351, the limiting frames, the through holes, and the guide rods 353 are in one-to-one correspondence to limiting groups, and the limiting groups are two and are arranged at intervals along the circumferential direction of the first lens barrel 311. The two limit groups are symmetrically arranged, so that one side of the first lens cone 311, which is far away from the limit frame, is prevented from tilting during single arrangement, and the focusing effect is influenced.
The invention is not limited to a driving structure form for realizing the whole telescopic driving of the second zoom assembly, and specifically, the second driving structure may be a VCM motor or a piezoelectric motor, where the driving end of the VCM motor or the piezoelectric motor is connected to the second lens barrel 321, so as to drive the second lens barrel 321 to drive the first lens barrel 311 to move along the depth direction of the mounting channel. The VCM Motor is simply called a voice Coil Motor, and under the action of the magnet yoke and the magnet, the VCM Motor can drive the second lens barrel 321 to move along the depth direction of the mounting channel, so that the advantages of low noise, low power consumption and the like are achieved, and the market demand and the higher and higher demands of customers are better met. The piezoelectric motor is an electric motor that converts electromechanical energy by using the piezoelectric inverse effect of a piezoelectric body. The vibration part consists of a vibration part and a motion part, and has no winding, magnet and insulating structure. The power density is much higher than that of a common motor, but the output power is limited, and the motor is preferably made into a light, thin and short form. The output of the device is mostly low-speed and high-thrust, the device can directly drive a load, and the influence on external electromagnetic interference and noise is small.
In addition, in the embodiment of the invention, in order to achieve a better focusing effect, 3 first lenses are arranged at intervals along the depth direction of the mounting channel; the second lenses are provided with 2 lenses and are arranged at intervals along the depth direction of the mounting channel. It should be noted that, each of the first lenses and each of the second lenses are not the same, and more lenses may be provided according to actual requirements.
The accuracy of the detection position by the displacement sensor can be set to make the focusing accuracy higher.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (9)
1. A push-retractable telescopic zoom lens, comprising:
a housing having a mounting channel formed therein;
the first zoom assembly is arranged in the mounting channel and comprises a first zoom lens barrel, and the position of the first zoom lens barrel along the depth direction of the mounting channel is adjustable;
the transmission structure comprises a first gear and a transmission wheel which can be in transmission coupling, and the first gear is in driving connection with the first zoom lens barrel; the method comprises the steps of,
the first driving structure is in driving connection with the driving wheel;
when the first driving structure drives the driving wheel to rotate, the first gear can synchronously rotate with the driving wheel;
when the first zoom lens barrel is retracted and moved by external force, the first gear and the driving wheel can rotate relatively;
the second zoom assembly is arranged on the inner side of the first zoom lens barrel and comprises a first lens group and a second lens group which are arranged at intervals along the depth direction of the mounting channel, the first lens group comprises a first lens barrel and at least one first lens arranged in the first lens barrel, the second lens group comprises a second lens barrel and at least one second lens arranged in the second lens barrel, and the first lens barrel is movably mounted on the second lens barrel along the depth direction of the mounting channel;
the first zoom lens barrel moves to the upper wall surface of the inner side of the first zoom lens barrel along the mounting channel to be propped against the first lens barrel, the second zoom assembly further comprises at least one compression spring, and the upper end and the lower end of the compression spring are propped against the first lens barrel and the second lens barrel respectively.
2. The retractable zoom lens according to claim 1, wherein the first gear and the driving wheel are disposed opposite to each other in a depth direction of the mounting passage, and a plurality of clamping grooves are provided on an end surface of the first gear facing the driving wheel, the plurality of clamping grooves being disposed at intervals in a circumferential direction;
the driving wheel is correspondingly provided with a plurality of clamping protrusions, and the clamping protrusions can be respectively and correspondingly clamped and installed in the clamping grooves.
3. The retractable zoom lens of claim 2, wherein the transmission structure further comprises a connection shaft extending in a depth direction of the mounting passage, the connection shaft being fixedly mounted on an inner wall surface of the housing;
the first gear rotates and the driving wheel sequentially rotates and sleeves the outer surface of the connecting shaft.
4. A retractable zoom lens according to claim 3, wherein an end surface of the first gear facing away from the driving wheel is provided with a mounting groove;
the transmission structure further includes:
the clamp spring is fixedly arranged on the connecting shaft and is positioned at one side of the first gear, which is away from the driving wheel; the method comprises the steps of,
the pre-tightening spring is positioned in the mounting groove, and two ends of the pre-tightening spring are respectively propped against the clamp spring and the bottom wall surface of the mounting groove.
5. The retractable zoom lens of claim 1, wherein the driving wheel is a worm wheel;
the first driving structure further includes:
a driving motor; the method comprises the steps of,
one end of the worm is in driving connection with the driving motor, and the other end of the worm is meshed with the worm wheel.
6. The retractable zoom lens of claim 1, further comprising a drive barrel rotatably adjustably mounted within the mounting channel, and a first transmission mechanism provided between the first zoom barrel and the drive barrel for converting rotation of the drive barrel into movement of the first zoom barrel in a depth direction of the mounting channel;
the outer surface of the driving cylinder is provided with a rack, and the rack is matched with the first gear to synchronously rotate with the first gear.
7. The retractable zoom lens of claim 6, wherein the driving cylinder and the first gear are disposed at intervals in a depth direction of the mounting passage;
and a connecting gear is arranged between the driving cylinder and the first gear, and the connecting gear is respectively meshed with the rack and the first gear.
8. The retractable zoom lens of claim 6, wherein the first transmission mechanism comprises a plurality of driving chute and a plurality of driving posts, the driving chute and the depth direction of the mounting channel are arranged in an inclined manner, the driving chute is arranged on the inner wall surface of the driving barrel at intervals along the circumferential direction, and the driving posts are correspondingly arranged on the outer wall surface of the first zoom lens barrel, so that the first zoom lens barrel is driven to move along the depth direction of the mounting channel when the driving barrel rotates.
9. The retractable zoom lens of claim 8, wherein a second transmission mechanism is disposed between the housing and the driving barrel, the second transmission mechanism comprises a plurality of sliding chute and a plurality of sliding columns, the sliding chute and the depth direction of the mounting channel are arranged in an inclined manner, the sliding chute is arranged on the inner wall surface of the housing at intervals along the circumferential direction, and the sliding columns are correspondingly arranged on the outer wall surface of the driving barrel.
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