CN208569145U - Photographic device - Google Patents
Photographic device Download PDFInfo
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- CN208569145U CN208569145U CN201820671201.8U CN201820671201U CN208569145U CN 208569145 U CN208569145 U CN 208569145U CN 201820671201 U CN201820671201 U CN 201820671201U CN 208569145 U CN208569145 U CN 208569145U
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- lens
- photographic device
- holder
- lens unit
- frame
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Abstract
The utility model provides a kind of photographic device.The focal position that lens can be steadily maintained dislocation occurs even if between lens unit and shell for the photographic device.The photographic device has: lens unit, the frame with multiple lens and the multiple lens of storage；Holder keeps the lens unit；And photographing element, it receives through the light beam after the lens, the holder includes: threaded portion, the lens unit can be made to move along optical axis direction using the threaded portion；And adhesive portion, the lens unit is fixed using the adhesive portion, in photographic device, the photographic device further includes the first containment member, first containment member has elasticity, it is only compressed along optical axis direction between the holder and shell, and between the holder and the shell.
Description
Technical field
The utility model relates to a kind of photographic devices equipped with the lens unit with multiple lens, even if providing one kind
The variation of the external environments such as external pressure, temperature also can steadily maintain the photographic device of the focal position of lens.
Background technique
As the photographic device for being used in onboard camera, monitoring camera etc., most use equipped with it is small-sized and it is low at
The photographic device of the lens unit of this fixed-focus referred to as pan focus type.
For example, being configured in the photographic device documented by patent document 1, in the outer spiral shell that the periphery of lens unit is formed
Line and the internal screw thread of the inner circumferential formation in holder are threadedly engaged, and make lens and rotating lens unit relative to holder
Unit is moved along optical axis direction, so that the focal position relative to imaging surface to lens is adjusted.In order to improve in device
Waterproofness, the air-tightness in portion sandwich flexible containment member between lens unit and shell.
Existing technical literature
Patent document 1: Japanese Unexamined Patent Publication 2010-78772 bulletin
Utility model content
Utility model will solve the problems, such as
In the photographic device documented by patent document 1, there are following worries: leading to lens unit because of part error
In the case where misplacing between shell, under the action of the elastic force of containment member, side pressure is applied to lens unit and makes
Inclined light shaft, so that focal position can not steadily be maintained.
The utility model is made in view of such situation, and one of its goals is to even if provide a kind of lens list
The photographic device that dislocation also can steadily maintain the focal position of lens occurs between member and shell.
The solution to the problem
In order to solve the above problems, the utility model provides a kind of photographic device, has: lens unit, has more
A lens and the frame for storing multiple lens；Holder keeps lens unit；And photographing element, it receives by saturating
Light beam after mirror, holder include: threaded portion, lens unit can be made to move along optical axis direction using the threaded portion；And it is viscous
Socket part is fixed lens unit using the adhesive portion, which is characterized in that, photographic device further includes the first sealing structure
Part, which has elasticity, between holder and shell, and only along optical axis side between holder and shell
To being compressed.
Being also possible to photographic device further includes the second containment member, which has elasticity, in multiple lens
In the first lens fitting portion corresponding with the first lens with frame of the first lens near subject between by along and light
Axis direction compression at right angle.
It is also possible to be equipped with side reducing diameter part, side reducing diameter part of second containment member in the first lens in the first lens
It is compressed between the first lens fitting portion of frame along with optical axis direction at right angle.
It is also possible to be equipped with hole of the side of self-insurance gripping member towards lens unit through the side of holder in holder,
Adhesive portion is configured to, and is adhesively fixed between hole and the side of lens unit.
The effect of utility model
Using the photographic device of the utility model, occur steadily tie up dislocation even if between lens unit and shell
Hold the focal position of lens.
Detailed description of the invention
Fig. 1 is the cross-sectional view for indicating the structure of photographic device of the embodiments of the present invention 1.
Fig. 2 is the perspective view for indicating the structure of photographic device of the embodiments of the present invention 1.
Fig. 3 is the main view of the elastic component of the embodiments of the present invention 1.
Fig. 4 is the side view of the elastic component of the embodiments of the present invention 1.
Fig. 5 is the cross-sectional view for indicating the structure of photographic device of the embodiments of the present invention 2.
Fig. 6 is the cross-sectional view for indicating the structure of photographic device of the embodiments of the present invention 3.
Fig. 7 is the cross-sectional view for indicating the structure of photographic device of the embodiments of the present invention 4.
Description of symbols
10, holder；11, circuit substrate mounting portion；12, threaded portion；13a, front side fitting portion；13b, rear side fitting portion；
13c, engaging section central point；14, adhesive portion；14a, front end face；14b, rear end face；15, front end；LU, lens unit；20, mirror
Frame；21, lens incorporating section；21a, L1, fitting portion；22, aperture section；23,23a, 23b, front side threaded portion；24, rear side threaded portion；
25a, front side fitting portion；25b, rear side fitting portion；26, adhesive portion；27, abutting part；30, front side pressure ring；31, lens maintaining part；
32, threaded portion；40, the 1st spacer ring；50, the 2nd spacer ring；60, rear side pressure ring；61, lens press section；62, threaded portion；63, embedding
Conjunction portion；70, force application spring；80, containment member；90, containment member；100, shell；L1~L8, the 1st lens~the 8th lens；
L1a, side reducing diameter part；A, optical axis；F, optical filter；S, solid-state imager；S1, protection glass；S2, imaging surface；S3, electricity
Base board interconnecting piece；The length (the distance between engaging section central point and imaging surface) of Lh, holder；Lb, frame length (nibble
The distance between conjunction portion central point and the 8th lens)；Bf, back focal length (the distance between the 8th lens and imaging surface)；TL, optics are complete
It is long.
Specific embodiment
Hereinafter, specifically describing the photographic device for implementing the utility model based on attached drawing.
Fig. 1 is the explanatory diagram for indicating the structure of photographic device of the embodiments of the present invention 1.As illustrated, it takes the photograph
As device has: lens unit LU；Holder 10 keeps lens unit LU；And the solid-state imagers S such as CMOS, CCD,
It is received through the light beam after lens.
Lens unit LU includes: lens L1~lens L8；Optical filter F；Frame 20 has and stores and keep lens
Lens incorporating section 21；Lens L1~lens L3 is pressed and is fixed on frame 20 by front side pressure ring 30；Rear side pressure ring 60,
Lens L4~lens L8 is pressed and be fixed on frame 20, and has chimeric for optical filter F and keeps optical filter F
Fitting portion 63；And force application spring 70, there is elasticity, exert a force to image side to lens L4~lens L8.
The threaded portion 32 of front side pressure ring 30 and the front side threaded portion 23a of frame 20 are threadedly engaged, the screw thread of rear side pressure ring 60
Portion 62 and the rear side threaded portion 24 of frame 20 are threadedly engaged.Rear side pressure ring 60 is equipped with the lens press section 61 by applanation lens 8.
As shown in Figure 3, Figure 4, force application spring 70 is the leaf spring of wave washer shape, in the abutting part 27 and lens of frame 20
It is compressed between the abutting part L51 of L5 along plate thickness direction, which exerts a force to lens L4~lens L8 to image side.
In addition, as shown in Figure 1, be equipped with the 1st spacer ring 40 between lens L6 and lens L7, lens L7 and lens L8 it
Between be equipped with the 2nd spacer ring 50.
For holder 10, by being threadedly engaged threaded portion 12 and the front side threaded portion 23b of frame 20, thus by lens
Unit LU, which is remained, to be moved along optical axis direction, also, the circuit substrate mounting portion 11 of holder 10 be threadably secured or
The fixing means such as bonding are fixed together with the circuit substrate (not shown) for being equipped with solid-state imager S.
Solid-state imager S has protection glass S1 and imaging surface S2, the circuit substrate interconnecting piece S3 of solid-state imager S
It is electrically connected with circuit substrate (not shown).
Holder 10 also have by can make lens unit LU along optical axis direction move in a manner of it is chimeric for lens unit LU
And keep the i.e. front side fitting portion 13a and rear side fitting portion 13b, front side fitting portion 13a of two fitting portions of lens unit LU chimeric
The rear side fitting portion 25b of frame 20 is embedded in the front side fitting portion 25a of frame 20, rear side fitting portion 13b.Thereby, it is possible to
The mode for keeping the optical axis A of lens unit LU vertical relative to imaging surface S2 stably keeps lens unit LU.
In addition, threaded portion 12 is set to than the middle part between front side fitting portion 13a and rear side fitting portion 13b by subject
Side, front side threaded portion 23b, which is set to, leans on the one of subject than the middle part between front side fitting portion 25a and rear side fitting portion 25b
Side, also, the distance between front side fitting portion 13a and the two fitting portions of rear side fitting portion 13b and front side fitting portion 25a with
The distance between the two fitting portions of rear side fitting portion 25b are 1/2 or more of lens unit overall length, that is, threaded portion 12 and front side
The middle part that the engaging section central point 13c of threaded portion 23b is set to the optical full length TL than photographic device leans on the side of subject, because
This, even if can also prevent the focal position of lens from deviating in the case where being applied to lens unit from external side pressure etc.
The inclination of such optical axis.Here, as shown in Figure 1, the optical full length TL of photographic device is i.e. saturating from lens optical system top
Distance until vertex end to imaging surface S2.
In addition, on holder 10, equipped with the side for running through holder 10 in a manner of making frame 20 be exposed to outside
Adhesive portion 14 can be in the front end face 14a of adhesive portion 14 and gluing for 20 side of frame by applying bonding agent B in adhesive portion 14
It is lens unit LU is Nian Jie solid between socket part 26 and between the rear end face 14b of adhesive portion 14 and the adhesive portion 26 of 20 side of frame
Due to holder 10.In addition, as shown in Fig. 2, adhesive portion 14 is provided at 3 in the circumferential direction of holder 10 every 120 ° of ground.Separately
Outside, either being directly bonded lens unit LU using adhesive portion 14, be also possible to using adhesive portion 14 be bonded other components and
Lens unit LU is fixed via other components.
The advantages of illustrating the adhering method.In the past, in the photographic device of fixed-focus, existing causes because of temperature change
Lens focal position offset the problem of, and because the expansion of bonding agent, shrink due to cause lens unit movement be exactly its reason it
One.
For example, lens unit and holder pass through screw thread in the previous photographic device being fixed using bonding agent
And it is threadedly engaged, it is possible to produce thread looseness, the sometimes expansion of the bonding agent caused by temperature change shrink due to make lens list
Member moves amount corresponding with thread looseness along optical axis direction, so as to cause focal position offset.
Adhering method according to the present utility model, even if temperature change leads to bonding agent B expansion, shrinks, due to being protected
The limitation of the front end face 14a and rear end face 14b of the adhesive portion 14 of gripping member 10, lens unit LU will not be moved along optical axis direction,
Focal position can steadily be maintained.
In addition, proposing following methods: such as in the previous photographic device that collet chuck is arranged between holder and frame
The relationship between the focal length of lens carrier (holder) and lens machine barrel (frame), collet chuck, lens is set down, that is,
LcCTEc=LmCTEm+LbCTEb-LfCTEf
Wherein, Lc: the length of collet chuck, Lm: the length of lens carrier, Lb: the length of lens machine barrel, Lf: the focus of lens
Distance, CTEc: the coefficient of thermal expansion of collet chuck material, CTEm: the coefficient of thermal expansion of lens carrier material, CTEb: lens machine barrel material
Coefficient of thermal expansion, CTEf: the rate of temperature change of lens,
Focal position is also able to maintain that in temperature change as a result,.That is, being the opposite direction in temperature change using collet chuck
The flexible method to offset the movement of the holder and frame that stretch in same direction using imaging surface as starting point.
In contrast, according to the utility model, holder 10 and frame 20 in the middle part than lens unit LU by shot
The side of body is fixed to each other by threaded portion 12 and front side threaded portion 23b and adhesive portion 14,26, therefore, in temperature change
When, holder 10 and frame 20 stretch in reverse direction using imaging surface S2 as starting point.Therefore, in the present invention, as follows
The relationship between the back focal length of holder 10 and frame 20, lens is set,
LhCTEh=LbCTEb-bfCTEf
Wherein, Lh: the length of holder, Lb: the length of frame, bf: back focal length, CTEh: the thermal expansion of holder material
Rate, CTEb: the coefficient of thermal expansion of frame material, CTFf: the rate of temperature change of lens,
CTFf is determined by the whole characteristic of the optical system comprising optical full length TL.
Focal position is also able to maintain that in temperature change as a result, therefore does not need collet chuck, so as to inhibit cost.
Here, as shown in Figure 1, shown in Figure 5, the length Lh of holder is the threaded portion 12 of self-insurance gripping member 10 and the front side of frame 20
Engaging section central point 13c between the 23b of threaded portion play imaging surface S2 until distance, the length Lb of frame is self-insurance gripping member 10
Threaded portion 12 and frame 20 front side threaded portion 23b between engaging section central point 13c play the rear surface of the 8th lens L8 and be
Distance only.In addition, back focal length bf is the distance until playing imaging surface S2 from the rear surface of the 8th lens L8.
In addition, Fig. 5 is the explanatory diagram for indicating the structure of photographic device of the embodiments of the present invention 2, it is in front side
Threaded portion 12 is equipped between fitting portion 13a and rear side fitting portion 13b and between front side fitting portion 25a and rear side fitting portion 25b
Equipped with threaded portion 23, the photographic device of the embodiments of the present invention 1 variation.
In addition, Fig. 6 is the explanatory diagram for indicating the structure of photographic device of the embodiments of the present invention 3, it is not have
The variation of front side fitting portion 13a and front side fitting portion 25a, the embodiments of the present invention 1 photographic device.
It is identical as embodiment 1 in embodiment 2, the engaging section central point of threaded portion 12 and front side threaded portion 23b
The middle part that 13c is set to the optical full length TL than photographic device leans on the side of subject, therefore, although compared with embodiment 1
The precision of optical axis is slightly worse, but identical as embodiment 1, even if the case where being applied to lens unit from external side pressure etc.
Under, it can also prevent the focal position of lens from deviating the inclination of such optical axis.
In addition, in the present invention, due to having with elasticity and being applied to image side to lens L4~lens L8 force
Power spring 70, therefore, in temperature change, even if being produced because of the difference of the coefficient of thermal expansion between frame 20 and lens L4~lens L8
Raw gap, also can steadily maintain back focal length bf.
Next, illustrating another advantage of the adhering method using Fig. 7.Fig. 7 is the embodiment party for indicating the utility model
The explanatory diagram of the structure of the photographic device of formula 4 is the variation of the photographic device of above-mentioned the embodiments of the present invention 1, is
One example of the photographic device with water proof structure.Common for the photographic device with the embodiments of the present invention 1
Part, the description thereof will be omitted.
Lens unit LU includes between the side reducing diameter part L1a of the 1st lens L1 and the L1 fitting portion 21a of frame 20 by edge
Radial (edge and optical axis direction at right angle) compression, flexible containment member 80, so that it is guaranteed that the lens of frame 20 are received
The waterproofness received in portion 21.
Photographic device further include between the front end of holder 10 15 and shell 100 it is only compressed along optical axis direction,
Flexible containment member 90, so that it is guaranteed that the waterproofness of photographic device peripheral portion.
Here, the lens unit in previous example positioned at holder front end is adhesively fixed, the position in portion is in the utility model
In be located at the side of self-insurance gripping member 10 towards through-hole, that is, adhesive portion 14 of lens unit LU, therefore, containment member 90 will not with it is viscous
It connects agent B phase to interfere, it can be ensured that waterproofness.
In addition, according to the water proof structure, even if causing to occur between lens unit LU and shell 100 because of part error
In the case where dislocation, side pressure will not be made to be applied to lens unit LU, therefore energy under the action of the elastic force of containment member 90
Enough focal positions for steadily maintaining lens.
Claims (4)
1. a kind of photographic device, has: lens unit, the frame with multiple lens and the multiple lens of storage；It keeps
Part keeps the lens unit；And photographing element, it receives through the light beam after the lens,
The holder includes:
Threaded portion can be such that the lens unit moves along optical axis direction using the threaded portion；And
Adhesive portion is fixed the lens unit using the adhesive portion,
The photographic device is characterized in that,
The photographic device further includes the first containment member, which has elasticity, positioned at the holder and outside
Between shell, and only compressed along optical axis direction between the holder and the shell.
2. photographic device according to claim 1, which is characterized in that
The photographic device further includes the second containment member, which has elasticity, in the multiple lens
Near subject the first lens with the frame between the first lens fitting portion corresponding with first lens by edge
It is compressed with optical axis direction at right angle.
3. photographic device according to claim 2, which is characterized in that
It is equipped with side reducing diameter part in first lens,
Second containment member is in the side reducing diameter part of first lens and the first lens fitting portion of the frame
Between by along and optical axis direction at right angle compress.
4. photographic device according to claim 2 or 3, which is characterized in that
It is equipped with from the side of the holder towards the lens unit in the holder through the side of the holder
Hole,
The adhesive portion is configured to, and is adhesively fixed between the hole and the side of the lens unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820671201.8U CN208569145U (en) | 2018-05-07 | 2018-05-07 | Photographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820671201.8U CN208569145U (en) | 2018-05-07 | 2018-05-07 | Photographic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208569145U true CN208569145U (en) | 2019-03-01 |
Family
ID=65480916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820671201.8U Active CN208569145U (en) | 2018-05-07 | 2018-05-07 | Photographic device |
Country Status (1)
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| CN (1) | CN208569145U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112363363A (en) * | 2019-07-26 | 2021-02-12 | 中强光电股份有限公司 | Lens structure and projection device |
-
2018
- 2018-05-07 CN CN201820671201.8U patent/CN208569145U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112363363A (en) * | 2019-07-26 | 2021-02-12 | 中强光电股份有限公司 | Lens structure and projection device |
| CN112363363B (en) * | 2019-07-26 | 2022-04-01 | 中强光电股份有限公司 | Lens structure and projection device |
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