CN206759586U - A kind of rear lens focus adjusting device and video camera - Google Patents
A kind of rear lens focus adjusting device and video camera Download PDFInfo
- Publication number
- CN206759586U CN206759586U CN201720412242.0U CN201720412242U CN206759586U CN 206759586 U CN206759586 U CN 206759586U CN 201720412242 U CN201720412242 U CN 201720412242U CN 206759586 U CN206759586 U CN 206759586U
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- cam ring
- rear lens
- adjusting device
- lens focus
- focus adjusting
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Abstract
Optical technical field is the utility model is related to, more particularly to a kind of rear lens focus adjusting device and video camera.The rear lens focus adjusting device, its drive device is connected with cam ring and cam ring is connected in pedestal；The madial wall of cam ring is circumferentially distributed at least three spiral chutes, and the lateral wall of imaging sensor fixed seat is provided with the follower pin for radially extending, corresponding and be slidably matched with each spiral chute；Pedestal is provided with the straight for corresponding and being open towards imaging sensor fixed seat with follower pin, and follower pin is slidably matched after passing through straight with spiral chute, so that follower pin can only be slided along the axis direction of cam ring；Strainer is stretched between housing and imaging sensor fixed seat.The rear lens focus adjusting device has strainer, and generation play can be avoided in focussing process, and then focus effect is good.
Description
Technical field
Optical technical field is the utility model is related to, more particularly to a kind of rear lens focus adjusting device and video camera.
Background technology
Existing video camera is required to be adjusted the rear lens focus of video camera, makes camera lens rear end after camera lens is installed
Focus be directed at the image clearly so as to watch with the imaging surface of imaging sensor.Video camera in use, is changing mirror
The installation site of head or camera lens needs to re-start focusing after changing, and therefore, many producers and individual devise rear lens focus tune
Regulating device, the position of imaging sensor is adjusted to be focused by rear lens focus adjusting device.
As shown in Fig. 1 structures, existing rear lens focus adjusting device includes the regulating bolt 100 being threadedly coupled with frame 300
With lock nut 200, lock nut 200 is arranged between regulating bolt 100 and frame 300, and frame 300 is cavity type structure,
Imaging sensor target surface 400 is fixedly connected with inside the frame 300 at the rear portion of regulating bolt 100, the front portion of regulating bolt 100 is fixed to be connected
Connect camera lens 500.Above-mentioned rear lens focus adjusting device by regulating bolt 100 adjust imaging sensor target surface 400 and camera lens 500 it
Between distance, and then burnt regulation after realizing.
Above-mentioned rear lens focus adjusting device is coordinated by the screw-driven of regulating bolt 100 and frame 300, is realized to rear Jiao
Regulation, simultaneously as above-mentioned rear lens focus adjusting device lacks strainer, therefore, during rear burnt regulation, adjust spiral shell
Bolt 100 and the screw thread of frame 300 have fit clearance, cause in focussing process, and bolt easily produces play and influences focusing effect
Fruit.
Utility model content
The utility model provides a kind of rear lens focus adjusting device and video camera, and the rear lens focus adjusting device, which has, to be opened
Tight mechanism, and generation play can be avoided in focussing process, and then focus effect is good.
To reach above-mentioned purpose, the utility model provides following technical scheme：
A kind of rear lens focus adjusting device, including housing, in addition to be arranged in the housing pedestal, drive device,
Cam ring, imaging sensor fixed seat and strainer；
The pedestal and the drive device are removably installed in the housing, described image sensor fixed seat, institute
State cam ring and the pedestal is cascading；
The drive device is connected with the cam ring and the cam ring is connected in the pedestal, for driving
The cam ring rotates around the axial line of its own；
The madial wall of the cam ring is circumferentially distributed at least three spiral chutes, described image sensor fixed seat
Lateral wall is provided with the follower pin for radially extending, corresponding and be slidably matched with each spiral chute；
The pedestal is provided with the straight line for corresponding and being open towards described image sensor fixed seat with the follower pin
Chute, the follower pin is slidably matched after passing through the straight with the spiral chute, so that the follower pin can only edge
The axis direction of the cam ring slides；
The strainer is stretched between the housing and described image sensor fixed seat.
The concrete operating principle of above-mentioned rear lens focus adjusting device is：When needing to adjust rear lens focus, filled by driving
Put axial line of the driving cam ring along itself to rotate, while cam ring rotates, positioned at the spiral chute of cam ring madial wall
Rotated with cam ring, now, the follower pin being slidably fitted in spiral chute can move under the drive of spiral chute, and
Because follower pin passes through the straight of pedestal, therefore, follower pin can only be along above and below straight under the drive of spiral chute
Motion, and then drive imaging sensor fixed seat and the imaging sensor being fixed in imaging sensor fixed seat to transport up and down
It is dynamic, so as to adjust the distance between imaging sensor and camera lens, make the focus of camera lens rear end and the imaging surface pair of imaging sensor
Standard, realize the focusing of rear lens focus.
Above-mentioned rear lens focus adjusting device is provided with strainer between housing and imaging sensor fixed seat, by opening
Tight mechanism can make imaging sensor fixed seat all the time in the state being tensioned；Simultaneously as imaging sensor fixed seat is led to
The spiral chute for crossing follower pin and cam ring is slidably matched, and cam ring is connected on pedestal, and cam ring is in drive device
Driving is lower to be rotated around the axial line of its own, and then drives follower pin can only be along the axis side of cam ring by rotary chute
To continuously slipping, so, during being focused using the rear lens focus adjusting device, imaging sensor fixed seat with it is convex
The state of continuously adjusting is constantly between torus, play will not be produced, focus effect is good.
Therefore, the rear lens focus adjusting device has strainer, and generation play can be avoided in focussing process, and then
Focus effect is good.
Preferably, the position-limit mechanism of the rotational angle for limiting the cam ring is included.
Preferably, the position-limit mechanism includes being installed on the limit base of the housing or the pedestal and is arranged at institute
State the limited block of the lateral wall of cam ring；The limited block is contained in the limit base, makes the limited block spacing first
Moved between position and the second restraining position.
Preferably, the cam ring is the annulus for being provided with flange；
The side of the pedestal towards the cam ring is provided with least three first circumferentially distributed limit fasteners, often
Individual first limit fastener is engaged by clamping with the flange.
Preferably, the side of the pedestal towards the cam ring is provided with least two second limit fasteners, the figure
As sensor fixed seat be provided with the one-to-one limit sliding chutes of at least two second limit fastener, each second is spacing
Buckle is slidably fitted in corresponding limit sliding chutes, for making described image sensor fixed seat can only be along the axle of the cam ring
Move in line direction.
Preferably, the strainer is tensioning spring.
Preferably, the drive device is stepper motor.
Preferably, it is provided with optical filter in described image sensor fixed seat.
In addition, the utility model additionally provides a kind of video camera, the video camera includes any of above-mentioned technical proposal offer
A kind of rear lens focus adjusting device.
Brief description of the drawings
Fig. 1 is a kind of structural representation of rear lens focus adjusting device in the prior art；
Fig. 2 is the overall structure diagram for the rear lens focus adjusting device that a kind of embodiment of the utility model provides；
Fig. 3 is the structural representation that rear lens focus adjusting device removes after housing in Fig. 2；
Fig. 4 is the diagrammatic cross-section that rear lens focus adjusting device removes after housing in Fig. 3.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
The utility model embodiment provides a kind of rear lens focus adjusting device and video camera, after the video camera includes camera lens
Burnt adjusting means, the rear lens focus adjusting device have strainer, and generation play can be avoided in focussing process, and then adjust
Burnt effect is good.
Wherein, it refer to Fig. 2, Fig. 3 and Fig. 4, the rear lens focus adjusting device that a kind of embodiment of the utility model provides,
The rear lens focus adjusting device includes housing 1, in addition to pedestal 2, drive device 3, cam ring 4, the image being arranged in housing 1
Sensor fixed seat 5 and strainer 6；As shown in Fig. 2 structures, imaging sensor fixed seat 5 is set away from the surface of cam ring 4
It is equipped with three fixing holes 53 for being used to install imaging sensor.
Pedestal 2 and drive device 3 are removably installed in housing 1, imaging sensor fixed seat 5, cam ring 4 and pedestal
2 are cascading；As shown in Fig. 2 and Fig. 3 structures, the fixed column 12 for installation pedestal 2 is provided with housing 1, and
Fixed column 12 is provided with screwed hole 121 of the opening towards pedestal 2, and pedestal 2 is provided with fixed ear 21, and pedestal 2 can be by through admittedly
Three grade fasteners of screw 9 for determining ear 21 are installed in housing 1, pedestal 2 is relatively fixed with housing 1；It is additionally provided with housing 1
For installing the fixing hole 13 of drive device 3, drive device 3 can be equally installed on by the cooperation of fastener and fixing hole 13
In housing 1, drive device 3 is set to be relatively fixed with housing 1；Housing 1 is additionally provided with the internal thread 11 for coordinating with camera lens screw thread,
Camera lens is arranged on the outside that housing 1 deviates from pedestal 2；
Drive device 3 and cam ring 4 are connected and cam ring 4 is connected in pedestal 2, for driving cam ring 4 around its from
The axial line of body rotates；As shown in Fig. 2 and Fig. 3 structures, cam ring 4 has flange 43, and pedestal 2 is provided with circumferentially distributed
First limit fastener 23, the first limit fastener 23 are connected on the flange 43 of cam ring 4, cam ring 4 in its axial direction can not
It is mobile, but can be rotated under the driving of drive device 3 around the axial line of itself；
The madial wall of cam ring 4 is circumferentially distributed at least three spiral chutes 41, the outside of imaging sensor fixed seat 5
Wall is provided with the follower pin 51 for radially extending, corresponding and be slidably matched with each spiral chute 41；Such as Fig. 2, Fig. 3 and
Shown in Fig. 4 structures, the madial wall of cam ring 4 is circumferentially distributed three spiral chutes 41, spiral chute 41 in cam ring 4 one
Individual end face is provided with the entrance 42 for loading follower pin 51, and the lateral wall of imaging sensor fixed seat 5, which is provided with, radially to be prolonged
The follower pin 51 stretched, follower pin 51 are corresponded and are slidably matched with spiral chute 41, in cam ring 4 because driven device 4 drives
When moving and rotating, spiral chute 41 rotates with the rotation of cam ring 4, and follower pin 51 is slidably matched with spiral chute 41, makes
Follower pin 51 can rotate together with cam ring 4；
Pedestal 2 is provided with the straight 22 for corresponding and being open towards imaging sensor fixed seat 5 with follower pin 51,
Follower pin 51 is slidably matched after passing through straight 22 with spiral chute 41, so that follower pin 51 can only be along the axis of cam ring 4
Slide in direction；As shown in Fig. 3 and Fig. 4 structures, pedestal 2 is provided with to correspond and be open with follower pin 51 and passed towards image
The straight 22 of sensor fixed seat 5, follower pin 51 is slidably matched after passing through straight 22 with spiral chute 41, due to driven
Pin 51 also extends through straight 22 while being slidably matched with spiral chute 41, therefore, follower pin 51 rotate in cam ring 4 and
In the case of being driven by spiral chute 41, follower pin 51 can only be slided along straight 22, entered under the limitation of straight 22
And can only be slided in the axis direction of cam ring 4, so as to which the driving of drive device 3 is converted into imaging sensor fixed seat 5
Along moving for the axis direction of cam ring 4, the regulation of the rear lens focus between imaging sensor and camera lens is realized.
Strainer 6 is stretched between housing 1 and imaging sensor fixed seat 5；As shown in Fig. 3 and Fig. 4 structures, tensioning
Mechanism 6 is tensioning spring, and tensioning spring is stretched between housing 1 and imaging sensor fixed seat 5.
The concrete operating principle of above-mentioned rear lens focus adjusting device is：When needing to adjust rear lens focus, filled by driving
Put axial line of the 3 driving cam rings 4 along itself to rotate, while cam ring 4 rotates, positioned at the spiral slide of the madial wall of cam ring 4
Groove 41 also rotates with cam ring 4, and now, the follower pin 51 being slidably fitted in spiral chute 41 can be in spiral chute 41
Lower motion is driven, and because follower pin 51 passes through the straight 22 of pedestal 2, therefore, band of the follower pin 51 in spiral chute 41
It can only be moved up and down under dynamic along straight 22, and then drive imaging sensor fixed seat 5 and be fixed on imaging sensor and consolidate
Imaging sensor in reservation 5 moves up and down, and so as to adjust the distance between still image sensor and camera lens, makes camera lens rear end
Focus be aligned with the imaging surface of imaging sensor, realize the focusing of rear lens focus.
Above-mentioned rear lens focus adjusting device is provided with strainer 6 between housing 1 and imaging sensor fixed seat 5, leads to
Crossing strainer 6 can make imaging sensor fixed seat 5 all the time in the state being tensioned；Simultaneously as imaging sensor is consolidated
Reservation 5 is slidably matched by follower pin 51 and the spiral chute 41 of cam ring 4, and cam ring 4 is connected on pedestal 2, cam
Ring 4 can only rotate under the driving of drive device 3 around the axial line of its own, and then drive follower pin 51 by rotary chute 41
Can only be continuously slipping along the axis direction of cam ring 4, so, in the process focused using the rear lens focus adjusting device
In, the state of continuously adjusting is constantly between imaging sensor fixed seat 5 and cam ring 4, play, focus effect will not be produced
It is good.
Therefore, the rear lens focus adjusting device has strainer 6, and generation play can be avoided in focussing process, enters
And focus effect is good.
In a kind of specific embodiment, as shown in Fig. 2 and Fig. 3 structures, above-mentioned rear lens focus adjusting device also includes
For the position-limit mechanism for the rotational angle for limiting cam ring 4.
By the adjustable range of rear lens focus adjusting device is limited by structure, therefore, above and below imaging sensor fixed seat 5
Adjustable range is certain, in order to ensure rear lens focus adjusting device can long-term stable operation, and prevent each part because exceeding work
Scope and damage, rear lens focus adjusting device is provided with the position-limit mechanism of the rotational angle for limiting cam ring 4, makes cam ring
4 rotational angle is maintained in the range of certain angle, and then fixes the distance that moves up and down of follower pin 51, so as to play protection
Rear lens focus adjusting device is capable of the effect of normal work.
Specifically, above-mentioned position-limit mechanism can include being installed on the limit base 7 of housing 1 or pedestal 2 and be arranged at cam
The limited block 44 of the lateral wall of ring 4；Limited block 44 is contained in limit base 7, makes limited block 44 in the first restraining position and second
Moved between restraining position.
As shown in Fig. 2 and Fig. 3 structures, position-limit mechanism includes being installed on the limit base 7 of pedestal 2 and is arranged at cam
The limited block 44 of the lateral wall of ring 4；Limit base 7 is installed on pedestal 2 by the support 25 set on pedestal 2, is set on limit base 7
There is the stopper slot for making limited block 44 be embedded in and act wherein.Limit base 7 can be by mechanical structures such as blocks to limited block
44 motion carries out limitation and realized to the spacing of the motion of cam ring 4, can also be detected by electronic components such as limit switches spacing
Detected to control drive device 3 to realize to the spacing of the motion of cam ring 4 position of block 44.
By limitation of the above-mentioned position-limit mechanism to the rotational angle of cam ring 4, the movement to imaging sensor fixed seat 5 is realized
The limitation of scope, whole rear lens focus adjusting device is set to always work in normal range (NR), after whole camera lens can not only be extended
The service life of burnt adjusting means, moreover it is possible to ensure the degree of regulation of rear lens focus adjusting device.
On the basis of above-mentioned various embodiments, as shown in Fig. 2, Fig. 3 and Fig. 4 structure, cam ring 4 is to be provided with flange
43 annulus；
The side of pedestal 2 towards cam ring 4 is provided with least three first circumferentially distributed limit fasteners 23, Mei Ge
One limit fastener 23 is engaged by clamping with flange 43.
Clamping is carried out by the flange 43 of at least three first limit fasteners 23 that pedestal 2 is set and the periphery of cam ring 4 to match somebody with somebody
Close, the movement of limitation cam ring 4 vertically, cam ring 4 is circumferentially rotated, the concentricity of cam ring 4 can be ensured, prevent
Only there is regulation error.
Similarly, in order to ensure imaging sensor fixed seat 5 can accurately along the axial movement of cam ring 4, as Fig. 2,
Shown in Fig. 3 and Fig. 4 structures, the side of pedestal 2 towards cam ring 4 is provided with least two second limit fasteners 24, and image passes
Sensor fixed seat 5 is provided with and at least two second limit fasteners, 24 one-to-one limit sliding chutes 52, each second limiting card
Button 24 is slidably fitted in corresponding limit sliding chutes 52, for making imaging sensor fixed seat 5 can only be along the axis side of cam ring 4
To motion.
As shown in Fig. 2, Fig. 3 and Fig. 4 structure, pedestal 2 is provided with least two second limits in the side towards cam ring 4
Position buckle 24, imaging sensor fixed seat 5 be provided with least two second limit fasteners, 24 one-to-one limit sliding chutes 52,
By being slidably matched for the second limit fastener 24 and limit sliding chutes 52, it is further ensured that imaging sensor fixed seat 5 can be high-precision
Axial movement of the degree ground along cam ring 4, prevent imaging sensor fixed seat 5 from producing a problem that tilting in moving process and sending out
It is raw, to ensure to make imaging sensor fixed seat 5 can only be moved along the axis direction of cam ring 4, and then ensure imaging sensor with
The precision of rear burnt regulation between camera lens.
In order to simplify the structure of whole rear lens focus adjusting device, the strainer 6 of above-mentioned rear lens focus adjusting device can
Think tensioning spring, or the tensioning other types of strainer of purpose can be realized.
In order to facilitate control rear lens focus adjusting device, above-mentioned drive device 3 can be stepper motor, and drive device 3 is simultaneously
It is not limited to stepper motor, or other kinds of drive device, as long as can realize that driving cam ring 4 is rotated i.e.
Can.
Meanwhile the drive connection between drive device 3 and cam ring 4, it can be realized by gear drive, i.e.
The output gear of drive device 3 is engaged transmission with the input gear set on cam ring 4, is turned by drive device 3
Dynamic driving cam ring 4, which is realized, to be rotated, also, drive connection is not limited to gear drive, can also be that can realize and will drive
The output campaign of dynamic device 3 is converted into any other transmission mechanism of the rotation of cam ring 4.
In order to obtain preferable shooting effect, optical filter 8 can be provided with above-mentioned imaging sensor fixed seat 5.
In addition, the utility model embodiment additionally provides a kind of video camera, the video camera includes what above-described embodiment provided
Any one rear lens focus adjusting device.
Because the rear lens focus adjusting device in above-described embodiment has strainer, and can avoid producing in focussing process
Raw play, and then focus effect is good, so that shooting effect can be improved by being provided with the video camera of the rear lens focus adjusting device.
Obviously, those skilled in the art can to the utility model embodiment carry out it is various change and modification without departing from
Spirit and scope of the present utility model.So, if these modifications and variations of the present utility model belong to the utility model right
It is required that and its within the scope of equivalent technologies, then the utility model be also intended to comprising these change and modification including.
Claims (9)
1. a kind of rear lens focus adjusting device, including housing, it is characterised in that also include being arranged at pedestal in the housing,
Drive device, cam ring, imaging sensor fixed seat and strainer；
The pedestal and the drive device are removably installed in the housing, described image sensor fixed seat, described convex
Torus and the pedestal are cascading；
The drive device is connected with the cam ring and the cam ring is connected in the pedestal, described for driving
Cam ring rotates around the axial line of its own；
The madial wall of the cam ring is circumferentially distributed at least three spiral chutes, the outside of described image sensor fixed seat
Wall is provided with the follower pin for radially extending, corresponding and be slidably matched with each spiral chute；
The pedestal is provided with the straight line for corresponding and being open with the follower pin towards described image sensor fixed seat and slided
Groove, the follower pin is slidably matched after passing through the straight with the spiral chute, so that the follower pin can only be along institute
The axis direction for stating cam ring slides；
The strainer is stretched between the housing and described image sensor fixed seat.
2. rear lens focus adjusting device according to claim 1, it is characterised in that also include being used to limit the cam ring
Rotational angle position-limit mechanism.
3. rear lens focus adjusting device according to claim 2, it is characterised in that the position-limit mechanism includes being installed on institute
State the limit base of housing or the pedestal and be arranged at the limited block of the lateral wall of the cam ring；The limited block accommodates
Moved in the limit base, making the limited block between the first restraining position and the second restraining position.
4. rear lens focus adjusting device according to claim 1, it is characterised in that the cam ring is to be provided with flange
Annulus；
The side of the pedestal towards the cam ring is provided with least three first circumferentially distributed limit fasteners, Mei Ge
One limit fastener is engaged by clamping with the flange.
5. rear lens focus adjusting device according to claim 4, it is characterised in that the pedestal is towards the cam ring
Side is provided with least two second limit fasteners, and described image sensor fixed seat is provided with and described at least two second limits
The position one-to-one limit sliding chutes of buckle, each second limit fastener is slidably fitted in corresponding limit sliding chutes, for making
Stating imaging sensor fixed seat can only move along the axis direction of the cam ring.
6. according to the rear lens focus adjusting device described in claim any one of 1-5, it is characterised in that the strainer is
Tight spring.
7. according to the rear lens focus adjusting device described in claim any one of 1-5, it is characterised in that the drive device is step
Stepper motor.
8. according to the rear lens focus adjusting device described in claim any one of 1-5, it is characterised in that described image sensor is solid
Optical filter is provided with reservation.
9. a kind of video camera, it is characterised in that including the rear lens focus adjusting device as described in claim any one of 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720412242.0U CN206759586U (en) | 2017-04-19 | 2017-04-19 | A kind of rear lens focus adjusting device and video camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720412242.0U CN206759586U (en) | 2017-04-19 | 2017-04-19 | A kind of rear lens focus adjusting device and video camera |
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| Publication Number | Publication Date |
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| CN206759586U true CN206759586U (en) | 2017-12-15 |
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ID=60614249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201720412242.0U Active CN206759586U (en) | 2017-04-19 | 2017-04-19 | A kind of rear lens focus adjusting device and video camera |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108632519A (en) * | 2018-08-09 | 2018-10-09 | 中山联合光电科技股份有限公司 | A kind of rear burnt regulating device on security protection optical lens |
| CN108683836A (en) * | 2018-08-09 | 2018-10-19 | 中山联合光电科技股份有限公司 | Burnt regulating device after a kind of optical lens |
| CN108989642A (en) * | 2018-08-09 | 2018-12-11 | 中山联合光电科技股份有限公司 | Burnt regulating device after a kind of |
| CN109167895A (en) * | 2018-08-30 | 2019-01-08 | 浙江大华技术股份有限公司 | Coke installation and method, photographic device after a kind of tune |
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2017
- 2017-04-19 CN CN201720412242.0U patent/CN206759586U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108632519A (en) * | 2018-08-09 | 2018-10-09 | 中山联合光电科技股份有限公司 | A kind of rear burnt regulating device on security protection optical lens |
| CN108683836A (en) * | 2018-08-09 | 2018-10-19 | 中山联合光电科技股份有限公司 | Burnt regulating device after a kind of optical lens |
| CN108989642A (en) * | 2018-08-09 | 2018-12-11 | 中山联合光电科技股份有限公司 | Burnt regulating device after a kind of |
| CN109167895A (en) * | 2018-08-30 | 2019-01-08 | 浙江大华技术股份有限公司 | Coke installation and method, photographic device after a kind of tune |
| CN109167895B (en) * | 2018-08-30 | 2021-02-02 | 浙江大华技术股份有限公司 | Rear focus adjusting device and method and camera device |
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