CN113777739B - Lens driving barrel and housing connecting mechanism, lens driving device and image pickup device - Google Patents
Lens driving barrel and housing connecting mechanism, lens driving device and image pickup device Download PDFInfo
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- CN113777739B CN113777739B CN202111034726.3A CN202111034726A CN113777739B CN 113777739 B CN113777739 B CN 113777739B CN 202111034726 A CN202111034726 A CN 202111034726A CN 113777739 B CN113777739 B CN 113777739B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 60
- 230000003287 optical effect Effects 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000000452 restraining effect Effects 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 20
- 238000003384 imaging method Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000002265 prevention Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/003—Alignment of optical elements
-
- 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
-
- 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)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The present invention relates to a lens driving barrel and a housing connection mechanism. The technical problems of poor concentricity of the existing drive and optical axis and the like are solved. The lens driving lens barrel and shell connecting mechanism comprises a base and a shell buckled on the base; the rotary drum is arranged in a cavity formed by the base and the shell, and the axial lead of the rotary drum is coincident with the optical axis; a bearing coupled to the housing and the drum, the bearing causing the drum to rotate about the optical axis; a telescopic lens barrel, one end of which is sleeved with the rotary drum; the restraint mechanism is connected with the base and the telescopic lens cone; the restraining mechanism enables the circumference of the telescopic lens barrel to be locked relative to the base, and enables the axial lead of the telescopic lens barrel to be overlapped with the optical axis; the transmission structure is arranged between the rotating drum and one sleeved end of the telescopic lens barrel; the transmission structure is used for transmitting a rotational driving force to the telescopic lens barrel when the rotary drum rotates to force the telescopic lens barrel to axially move in the optical axis. The invention has the advantages that: concentricity of the drive and the optical axis is improved.
Description
Technical Field
The invention belongs to the technical field of camera motors, and particularly relates to a lens driving lens barrel and shell connecting mechanism, a lens driving device and an imaging device.
Background
The miniature camera long-focus lens is widely applied to high-end mobile phones, and the applied image sensor pixels are also improved from 800 ten thousand pixels to more than 1 hundred million pixels, so that the equivalent focal length of the miniature lens is far beyond the thickness of the mobile phone body. Although periscope type motors are a mature solution for mobile phone tele cameras, pixels are greatly improved, the outer diameter of a lens is also larger and larger, and the periscope type motors are limited in application. Therefore, the telescopic camera of the miniature lens barrel not only can solve the problem that the long-focus lens with the oversized pixels is arranged and used on the mobile phone, but also can greatly improve the image quality.
The image pickup apparatus is generally applied to an image pickup motor, which has a focusing function. The existing camera motor comprises a bearing frame for bearing a lens, wherein the bearing frame is driven by electromagnetism (magnet and coil) in the axial direction of an optical axis, and the focusing stroke of the bearing frame is short. The inventor improves the focusing of the bearing frame in the axial direction of the optical axis by utilizing the cooperation of the stator and the rotor, and the focusing stroke is increased in the mode, and the principle of the mode is as follows: the stator drives the rotor to rotate, the stator is arranged on the base or the shell, the rotor is arranged on the bearing frame, the bearing frame and the stator are in threaded connection to drive the bearing frame to focus in the axial direction of the optical axis, and the bearing frame axis and the optical axis have larger deviation in the mode, so that the final imaging quality is poor directly caused by the deviation, and the requirement of high-precision shooting is difficult to meet.
Second, existing motors of this type are expensive to manufacture because the stator and rotor need to be mated at all times, and the length of the stator and rotor needs to be lengthened as the rotor, which is attached to the carrier, moves away from the stator as the threads move away from the stator.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to provide a lens driving barrel and housing connection mechanism, a lens driving device, and an imaging device that can solve the above problems.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the lens driving barrel and housing connection mechanism includes:
the base and the shell is buckled on the base;
a rotary drum which is arranged in a cavity formed by the base and the shell, and the axial lead of the rotary drum is coincident with the optical axis;
a bearing coupled to the housing and the drum, the bearing causing the drum to rotate about the optical axis;
the telescopic lens barrel is used for bearing lenses, one end of the telescopic lens barrel is inserted into the rotary drum and sleeved with the rotary drum, and the other end of the telescopic lens barrel is far away from the base;
the restraint mechanism is connected with the base and the telescopic lens cone; the restraining mechanism enables the circumference of the telescopic lens barrel to be locked relative to the base, and enables the axial lead of the telescopic lens barrel to be overlapped with the optical axis;
the transmission structure is arranged between the rotating drum and one sleeved end of the telescopic lens barrel; the transmission structure is used for transmitting a rotational driving force to the telescopic lens barrel when the rotary drum rotates to force the telescopic lens barrel to axially move in the optical axis.
The bearing plays a suspending role, namely, one end of the rotary drum far away from the base is rotationally connected with the shell, and one end of the rotary drum close to the base is free. The structure can effectively reduce the manufacturing cost and improve the assembly efficiency, and simultaneously, the structure can also meet the rotation driving requirement, ensure that the axis of the rotary drum is coincident with the optical axis, and ensure the shooting quality.
The rotary drum is cooperated with the design of the bearing, and the rotary drum is arranged in the cavity to protect the rotary drum driving mechanism, so that the service life is prolonged.
In the lens driving lens barrel and shell connecting mechanism, the bearing fixing part with an inner bearing fixing step is arranged at the top of the shell, the bearing is a ball bearing, the outer ring of the bearing is fixed on the inner bearing fixing step, the inner ring of the bearing is sleeved on the outer wall of one end of the rotary drum, which is far away from the base, and the bearing enables one end of the rotary drum, which is close to the base, to be free.
In the above-described lens driving barrel and housing connection mechanism, the bearing fixing portion protrudes from the top of the housing.
In the above-mentioned lens driving barrel and housing connection mechanism, the top of the bearing fixing portion far away from the housing is connected with a shielding portion which is sleeved on the periphery of the telescopic barrel and shields the outer side of one end face of the rotary drum far away from the base, and the shielding portion passes over the bearing.
In the above-mentioned lens driving barrel and housing connecting mechanism, the axis of the drum and the axis of the telescopic barrel coincide.
In the above-mentioned lens driving barrel and housing connection mechanism, the transmission structure is a screw transmission structure.
In the above-mentioned lens driving lens cone and casing coupling mechanism, the rotary drum cover is at telescopic lens cone outer wall, transmission structure is equipped with the external screw thread including locating the internal screw thread of rotary drum inner wall at telescopic lens cone outer wall, internal screw thread and external screw thread threaded connection. The structure can prevent the lens in the telescopic lens barrel from contacting with the end surface of the rotary drum close to one end of the telescopic lens barrel, and simultaneously, the distribution and the assembly of the constraint mechanism can be facilitated.
In the above-mentioned lens driving lens cone and casing coupling mechanism, restraint mechanism includes a plurality of restraint holes of locating on the telescopic lens cone wall thickness and being circumference distribution, and restraint hole is parallel with the axial lead of telescopic lens cone, restraint mechanism still includes a plurality of restraint polished rods that are located the rotary drum, restraint polished rod's one end is fixed in on the base, restraint polished rod's the other end one-to-one inserts corresponding restraint hole.
Of course, the constricting orifice of the present embodiment may be replaced by a constricting channel.
Each of the restraint apertures includes a front restraint aperture and a rear restraint aperture, respectively.
The front restraint hole is arranged at a half position of the wall thickness of the telescopic lens barrel, so that the front restraint hole has very good radial deformation resistance.
The front constraint holes distributed circumferentially can carry out position constraint on the constraint polished rod, and the axial lead position of the telescopic lens barrel can be constrained. The front constraint hole is in micro clearance fit with the constraint polish rod.
In the above-mentioned lens driving barrel and housing connection mechanism, the front restriction hole is a blind hole, and the orifice of the front restriction hole faces the base. The blind hole can play a role in limiting the focusing limit position, and secondly, the purposes of dust prevention and the like can be achieved.
In the above lens driving barrel and housing connecting mechanism, one end of the inner wall of the telescopic barrel, which is close to the orifice of the front constraint hole, is provided with a fixing groove, and a constraint reinforcing ring fixed in the fixing groove, wherein the constraint reinforcing ring is provided with a plurality of rear constraint holes, the number of the rear constraint holes is equal to that of the front constraint holes, and one front constraint hole is communicated with one rear constraint hole.
The front constraint hole axis and the rear constraint hole axis coincide, so that the axis of the constraint reinforcing ring coincides with the optical axis to have a very high optical axis coincidence degree.
The constraint reinforcing ring is used for reinforcing radial strength of a section provided with external threads, and meanwhile, the constraint polished rod can be constrained when the constraint polished rod is in different front and rear positions.
In the above-mentioned lens driving barrel and housing connection mechanism, the inner wall of the constraint reinforcement ring is provided with an inner ring groove, and each rear constraint Kong Fenqie is divided into two sub-constraint through holes which are distributed in sequence along the axial direction of the optical axis and are mutually communicated by the inner ring groove, and the constraint polish rod is always inserted into one sub-constraint through hole close to one side of the base. The inner ring groove reduces the contact area with the constraint polish rod so as to reduce focusing resistance and improve efficiency, and meanwhile, the lens is convenient to install and fix.
The constraint polish rod is always subjected to radial position constraint by the sub constraint through hole, in addition, one end of the constraint reinforcing ring, which is close to the front constraint hole, can radially strengthen the orifice of the front constraint hole, so that the constraint polish rod cannot be inserted for focusing adjustment due to the deformation of the front constraint hole, and the other end of the constraint reinforcing ring, which is far away from the front constraint hole, is used for radially strengthening the inner wall of one end of the telescopic lens barrel, which is close to the base.
The invention also provides a lens driving device which is provided with the lens driving lens barrel and a shell connecting mechanism.
The invention also provides an image pickup device, which is provided with the lens driving device.
The invention also provides electronic equipment, which is provided with the image pickup device.
Compared with the prior art, the invention has the advantages that:
by utilizing the synergistic effect of the transmission structure and the constraint mechanism, the telescopic lens barrel can be driven by the rotary driving force to axially move on the optical axis, so that the axial lead of the telescopic lens barrel bearing the lens can be ensured to always coincide with the optical axis, and the shooting quality is greatly improved on the premise of meeting the requirement of large-stroke focusing. Secondly, by utilizing the design of the outer rotary cylinder and the inner telescopic lens barrel, the manufacturing difficulty and the manufacturing cost, particularly the manufacturing cost of the stator and the rotor, are reduced.
The rotary drum is axially fixed relative to the base and can rotate, the length of the rotary drum is greatly shortened on the premise, and the design can reduce the axial length of the optical axis of the driving mechanism of the lens driving device, so that the rotary drum can be applied to a thinner or ultrathin image pickup terminal.
The rotary drum is axially fixed by the bearing and is rotationally connected with the shell, so that the forward and reverse rotation stability of the rotationally driven telescopic lens barrel can be ensured, and the telescopic smoothness of the telescopic lens barrel can be further improved.
Drawings
Fig. 1 is a schematic view of a lens driving device according to the present invention.
Fig. 2 is a schematic cross-sectional view of fig. 1 taken along line B-B.
Fig. 3 is a schematic perspective view of a lens driving device according to the present invention.
Fig. 4 is an exploded view of a lens driving device according to the present invention.
Fig. 5 is a schematic view of a housing structure of a lens driving device according to the present invention.
Fig. 6 is a schematic view of a drum structure of a lens driving device according to the present invention.
Fig. 7 is a schematic structural diagram of an image capturing apparatus according to the present invention.
Fig. 8 is a schematic structural diagram of an electronic device provided by the present invention.
In the figure, a base 1, a rotary drum 2, an internal thread 20, an external bearing fixing step 21, a telescopic lens barrel 3, an external thread 30, a restraint mechanism 4, a front restraint hole 40, a restraint polish rod 41, a restraint reinforcing ring 42, an inner ring groove 420, a rear restraint hole 43, a sub restraint through hole 430, a housing 5, a bearing fixing portion 50, an internal bearing fixing step 500, a shielding portion 51, and a bearing 6.
Detailed Description
The following are specific embodiments of the invention and the technical solutions of the invention will be further described with reference to the accompanying drawings, but the invention is not limited to these embodiments.
Example 1
As shown in fig. 1 to 3, the lens driving device includes a lens driving barrel and a housing connection mechanism, specifically, the lens driving barrel and housing connection mechanism of the present embodiment includes a base 1, a drum 2, a telescopic barrel 3, a restraint mechanism 4, a transmission structure, a housing 5, and a bearing 6, and the base 1 has a ring-shaped plate shape.
The shell 5 is buckled on one surface of the base 1 in the thickness direction, a cavity is formed between the base 1 and the shell 5, and the shell 5 plays a role in protection.
The drum 2 rotates relative to the base 1 and the drum 2 is fixed relative to the axial housing and the base 1, i.e. the drum 2 is not axially displaced in the optical axis. Further, the end of the drum 2 remote from the base 1 is rotatably connected to the housing 5 in this embodiment, and specifically, a bearing 6 is connected to the housing 5 and the drum 2, the bearing 6 causing the drum 2 to rotate about the optical axis.
Further, a bearing fixing portion 50 having an inner bearing fixing step 500 is provided at the top of the housing 5, the bearing 6 is a ball bearing, an outer ring of the bearing 6 is fixed on the inner bearing fixing step 500, and an inner ring of the bearing 6 is sleeved on an outer wall of one end of the drum 2 away from the base 1.
The outer circumferential surface of the outer ring of the bearing 6 is fixed to the circumferential surface of the inner bearing fixing step 500, and the upper circular end surface of the outer ring of the bearing 6 is fixed to the upper circular surface of the inner bearing fixing step 500 in such a manner that it increases the fixing connection area to ensure the bearing fixing stability. Of course, glue may be provided between the bearing outer race and the inner bearing fixing step 500 to improve fixing strength.
Next, as shown in fig. 2 and fig. 5 to fig. 6, an outer bearing fixing step 21 is provided at an end of the outer wall of the drum 2 away from the base 1, the inner ring of the bearing 6 is fixed to the outer bearing fixing step 21, and similarly, the inner circumferential surface and the lower circular end surface of the inner ring of the bearing 6 are respectively fixed to the circumferential surface and the lower circular surface of the outer bearing fixing step 21, and glue may be provided to strengthen the strength of fixing the inner ring to the outer bearing fixing step 21.
The inner bearing fixing step 500 is located at the outer side of the outer bearing fixing step 21, and the inner bearing fixing step 500 and the outer bearing fixing step 21 are surrounded to form a bearing accommodating annular space.
In addition, the end face of the rotary drum 2 far away from the base 1 is located on the outer side of the end face of the bearing 6 inner ring far away from the base 1, and the fixing firmness of the bearing inner ring can be ensured in an uneven mode.
Preferably, the bearing fixing portion 50 of the present embodiment protrudes from the top of the housing 5. A shielding part 51 which is sleeved on the periphery of the telescopic lens barrel 3 and shields the outer side of one end surface of the rotary drum 2, which is far away from the base 1, is connected to the top of the bearing fixing part 50, which is far away from the shell 5. The shielding portion 51 serves the purposes of dust prevention, water prevention and the like, and can prolong the service life of the bearing.
The housing 5, the bearing fixing portion 50 and the shielding portion 51 of the present embodiment are connected into an integral structure, that is, the three materials are the same, the housing 5 is manufactured and molded in advance, and then the bearing fixing portion 50 and the shielding portion 51 are molded by punching or other methods.
The telescopic lens barrel 3 is used for bearing lenses, one end of the telescopic lens barrel 3 is sleeved with the rotary drum 2, and the other end of the telescopic lens barrel 3 is far away from the base 1. Preferably, the axis of the rotary drum 2 and the axis of the telescopic lens barrel 3 in the embodiment are coincident, so that the axis is coincident with the optical axis a, and focusing accuracy and subsequent imaging quality are realized.
The restraint mechanism 4 is connected with the base 1 and the telescopic lens barrel 3; the restraining mechanism 4 locks the telescopic lens barrel 3 relative to the base 1 in the circumferential direction, and the restraining mechanism 4 enables the axial lead of the telescopic lens barrel 3 to coincide with the optical axis, which is the optical axis of incident light.
The transmission structure is arranged between the rotating drum 2 and one sleeved end of the telescopic lens barrel 3; the transmission structure is used to transmit a rotational driving force to the telescopic cylinder 3 when the drum 2 rotates to force the telescopic cylinder 3 to move in the optical axis axial direction.
In this embodiment, by using the synergistic effect of the transmission structure and the constraint mechanism 4, the telescopic lens barrel 3 can be moved in the axial direction of the optical axis under the driving of the rotation driving force, so that the axial line of the telescopic lens barrel 3 bearing the lens can be ensured to always coincide with the optical axis, and the image pickup quality is greatly improved on the premise of meeting the requirement of large-stroke focusing. Second, with the design of the outer barrel 2 and the inner telescopic barrel 3, it reduces the difficulty of manufacturing and manufacturing costs.
Further, the drum 2 of the present embodiment is fixed in the axial direction with respect to the base 1, and the drum 2 is greatly shortened in length on the premise that the design can reduce the axial length of the optical axis of the driving mechanism of the lens driving device, and thus can be applied to a thinner or ultra-thin image pickup terminal.
Preferably, the transmission structure of the present embodiment is a threaded transmission structure. Further, the rotary drum 2 is sleeved on the outer wall of the telescopic lens barrel 3, the transmission structure comprises an internal thread 20 arranged on the inner wall of the rotary drum 2, an external thread 30 is arranged on the outer wall of the telescopic lens barrel 3, and the internal thread 20 is in threaded connection with the external thread 30. The structure can prevent the lens in the telescopic lens barrel 3 from contacting with the end face of the rotary drum 2 close to the telescopic lens barrel 3, and simultaneously, the distribution and the assembly of the constraint mechanism can be facilitated.
The internal thread 20 is longer than the external thread 30.
That is, the inner wall of the rotary drum 2 is provided with the internal thread, one end of the outer wall of the telescopic lens barrel 3 close to the base 1 is provided with the external thread 30, the rest of the outer walls of the telescopic lens barrel 3 are not provided with the external thread, the diameter of the outer wall of the telescopic lens barrel 3 without the external thread is smaller than the bottom diameter of the external thread, the rotary drum 2 is arranged in the shell and is rotationally connected with the shell, and the telescopic lens barrel 3 can extend out of the shell and be contained in the rotary drum 2, so that a better dustproof and waterproof effect is achieved. The shielding part 51 is sleeved on the outer wall of the telescopic lens barrel 3 without external threads.
Preferably, as shown in fig. 2 and 4, the restraint mechanism 4 of the present embodiment includes a plurality of restraint holes that are disposed on the wall thickness of the telescopic lens barrel 3 and are circumferentially distributed, the number of restraint holes is 2-4 and are circumferentially uniformly distributed, the restraint holes are parallel to the axis of the telescopic lens barrel 3, the restraint mechanism 4 further includes a plurality of restraint polished rods 41 that are located in the rotating cylinder 2, one end of each restraint polished rod 41 is fixed on the base 1, and the other end of each restraint polished rod 41 is inserted into a corresponding restraint hole one by one.
Each of the restraint apertures includes a front restraint aperture 40 and a rear restraint aperture 43, respectively.
The front restraint hole 40 is arranged at a half position of the wall thickness (single-side wall thickness) of the telescopic lens barrel 3, so that the front restraint hole 40 has very good radial deformation resistance and is convenient to process and manufacture.
The front constraint holes 40 distributed circumferentially can position constraint the constraint polish rod 41, and can also constrain the axial lead position of the telescopic lens barrel 3. The front restraint aperture 40 and restraint polish rod 41 are slightly clearance fit.
Second, the front restriction hole 40 of the present embodiment is a blind hole, and the orifice of the front restriction hole 40 faces the base 1. The blind hole can play a role in limiting the focusing limit position, and secondly, the purposes of dust prevention and the like can be achieved.
In addition, a fixing groove and a constraint reinforcing ring 42 fixed in the fixing groove are arranged at one end of the inner wall of the telescopic lens barrel 3 near the orifice of the front constraint hole 40, a plurality of rear constraint holes 43 are arranged on the constraint reinforcing ring 42, the number of the rear constraint holes 43 is equal to that of the front constraint holes 40, and one front constraint hole 40 is communicated with one rear constraint hole 43.
The axes of the front constraining holes 40 and the rear constraining holes 43 coincide so that the axes of the constraining reinforcing rings 42 coincide with the optical axes to have a very high optical axis coincidence. The constraint reinforcing ring 42 is used for reinforcing radial strength of a section provided with external threads, and can also be used for constraining the polished rod 41 at different positions.
An inner ring groove 420 is arranged on the inner wall of the constraint reinforcing ring 42, each rear constraint hole 43 is divided into two sub constraint through holes 430 which are distributed in sequence along the axial direction of the optical axis and are mutually communicated by the inner ring groove 420, and the constraint polish rod 41 is always inserted into one sub constraint through hole 430 close to one side of the base 1. The inner ring groove 420 reduces the contact area with the constraint polish rod 41 to reduce focusing resistance, improve efficiency, and facilitate lens mounting and fixing.
The inner wall of the restraint reinforcement ring 42 and the inner wall of the telescopic cylinder 3 are equal to or slightly smaller than the inner wall of the telescopic cylinder 3.
The end face of the restraint reinforcement ring 42 near the base 1 and the end face of the telescopic barrel 3 near the base 1 are flush.
One sub-constraint through hole 430 always carries out radial position constraint on the constraint polish rod 41, in addition, one end of the constraint reinforcing ring 42, which is close to the front constraint hole 40, can radially strengthen the orifice of the front constraint hole 40 so as to prevent the constraint polish rod 41 from being inserted for focusing adjustment due to the deformation of the front constraint hole 40, and the other end of the constraint reinforcing ring 42, which is far away from the front constraint hole 40, is used for radially strengthening the inner wall of one end of the telescopic lens barrel 3, which is close to the base.
Secondly, an arc convex surface is arranged at one end of the constraint polish rod 41 far away from the base 1, and the structure can play a role in guiding.
The constraint enforcement ring 42 of the present embodiment has two forms:
first, the confinement stiffener ring 42 is of unitary construction;
second, the restraint stiffener ring 42 includes an L-shaped portion and a base portion that is located at one vertical end of the L-shaped portion such that the L-shaped portion and the base portion enclose an inner ring groove 420.
The working principle of this embodiment is as follows:
the rotary drum 2 rotates relative to the base 1 and the shell 5 under the drive of rotary driving power;
the internal thread of the inner wall of the rotary drum 2 and the external thread of the outer wall of the telescopic lens barrel 3 cooperate to push the telescopic lens barrel 3 to axially move on the optical axis under the action of the constraint mechanism 4.
Alternatively, the restraint mechanism 4 includes a bar-shaped groove provided on the outer wall of the telescopic barrel 3 and distributed along the axial direction of the telescopic barrel 3, and a bar-shaped protrusion provided on the top of the housing for being engaged with the bar-shaped groove one by one. This way also allows axial displacement of the telescopic barrel in the optical axis.
Example two
As shown in fig. 3, the present lens driving apparatus has the lens driving barrel and the housing connection mechanism described in the first embodiment.
Example III
As shown in fig. 7, the present imaging apparatus includes a lens driving apparatus according to the second embodiment, and a lens is mounted on the lens driving apparatus.
Example IV
As shown in fig. 8, the present electronic apparatus has an imaging device according to the third embodiment. Electronic devices such as: cell phones, tablets, and computers, etc.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. The lens actuating mechanism, including lens actuating cylinder and casing coupling mechanism, lens actuating mechanism includes base (1) and lock shell (5) on base (1), its characterized in that, lens actuating cylinder and casing coupling mechanism still include:
the rotary drum (2) is arranged in a cavity formed by the base (1) and the shell (5), and the axial lead of the rotary drum (2) is coincident with the optical axis;
a bearing (6) connected to the housing (5) and the drum (2), the bearing (6) causing the drum (2) to rotate about the optical axis;
the telescopic lens barrel (3) is used for bearing lenses, and one end of the telescopic lens barrel (3) is inserted into the rotary drum (2);
a restraint mechanism (4) connected to the base (1) and the telescopic lens barrel (3); the restraining mechanism (4) enables the telescopic lens barrel (3) to be locked relative to the base (1) in the circumferential direction, and the restraining mechanism (4) enables the axial lead and the optical axis of the telescopic lens barrel (3) to coincide;
the transmission structure is arranged between the rotating drum (2) and one sleeved end of the telescopic lens barrel (3); the transmission structure is used for transmitting a rotary driving force to the telescopic lens barrel (3) when the rotary drum (2) rotates so as to force the telescopic lens barrel (3) to axially move on the optical axis;
the restraint mechanism (4) comprises a plurality of restraint holes which are arranged on the wall thickness of the telescopic lens cone (3) and are circumferentially distributed, the restraint holes are parallel to the axis of the telescopic lens cone (3), the restraint mechanism (4) further comprises a plurality of restraint polished rods (41) which are positioned in the rotary drum (2), one ends of the restraint polished rods (41) are fixed on the base (1), and the other ends of the restraint polished rods (41) are inserted into the corresponding restraint holes one by one;
each restraint aperture comprises a front restraint aperture (40) and a rear restraint aperture (43), respectively, the front restraint aperture (40) being in communication with the rear restraint aperture (43);
one end of the inner wall of the telescopic lens barrel (3) close to the orifice of the front restraint hole (40) is provided with a restraint reinforcing ring (42), a plurality of rear restraint holes (43) are formed in the restraint reinforcing ring (42), the number of the rear restraint holes (43) is equal to that of the front restraint holes (40), and one front restraint hole (40) is communicated with one rear restraint hole (43).
2. The lens driving mechanism according to claim 1, wherein the top of the housing (5) is provided with a bearing fixing portion (50) having an inner bearing fixing step (500), the bearing (6) is a ball bearing, an outer ring of the bearing (6) is fixed on the inner bearing fixing step (500), an inner ring of the bearing (6) is sleeved on an outer wall of one end of the rotary drum (2) far away from the base (1), and one end of the rotary drum (2) near the base (1) is free by the bearing (6).
3. A lens driving mechanism according to claim 2, wherein the bearing fixing portion (50) protrudes from the top of the housing (5).
4. A lens driving mechanism according to claim 3, wherein the top of the bearing fixing part (50) far from the housing (5) is connected with a shielding part (51) which is sleeved on the periphery of the telescopic lens barrel (3) and is shielded outside one end face of the bearing (6) far from the base (1), and the shielding part (51) passes over the bearing.
5. The lens driving mechanism according to claim 1, wherein the rotary drum (2) is sleeved on the outer wall of the telescopic lens barrel (3), the transmission structure comprises an inner thread (20) arranged on the inner wall of the rotary drum (2), an outer thread (30) is arranged on the outer wall of the telescopic lens barrel (3), and the inner thread (20) is in threaded connection with the outer thread (30).
6. Lens driving mechanism according to claim 1, characterized in that the front constraint hole (40) is a blind hole, the orifice of the front constraint hole (40) being directed towards the base (1) and communicating with the rear constraint hole (43).
7. Lens driving mechanism according to claim 1, characterized in that the inner wall of the telescopic barrel (3) is provided with a fixing groove at one end close to the orifice of the front restriction hole (40), and a restriction reinforcing ring (42) fixed in the fixing groove.
8. The lens driving mechanism according to claim 1, wherein the inner wall of the constraint reinforcing ring (42) is provided with an inner ring groove (420), each rear constraint hole (43) is divided into two sub constraint through holes (430) which are distributed in sequence along the axial direction of the optical axis and are mutually communicated by the inner ring groove (420), and the constraint polish rod (41) is always inserted into one sub constraint through hole (430) close to one side of the base (1).
9. A lens driving device comprising the lens driving mechanism according to any one of claims 1 to 8.
10. An imaging device comprising the lens driving device according to claim 9.
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| CN202111034726.3A CN113777739B (en) | 2021-09-04 | 2021-09-04 | Lens driving barrel and housing connecting mechanism, lens driving device and image pickup device |
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| CN202111034726.3A CN113777739B (en) | 2021-09-04 | 2021-09-04 | Lens driving barrel and housing connecting mechanism, lens driving device and image pickup device |
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| CN113777739A CN113777739A (en) | 2021-12-10 |
| CN113777739B true CN113777739B (en) | 2023-12-22 |
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| CN113777739A (en) | 2021-12-10 |
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