CN204681480U - A kind of video imaging apparatus focal length adjustment device - Google Patents
A kind of video imaging apparatus focal length adjustment device Download PDFInfo
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- CN204681480U CN204681480U CN201520402267.3U CN201520402267U CN204681480U CN 204681480 U CN204681480 U CN 204681480U CN 201520402267 U CN201520402267 U CN 201520402267U CN 204681480 U CN204681480 U CN 204681480U
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- gear
- focal length
- adjustment device
- length adjustment
- straight spur
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Abstract
The utility model discloses a kind of telephoto lens focal length adjustment device being applicable to long-distance video imaging device and being suitable for, this device is made up of gear drive and camera lens retaining mechanism; Wherein, this gear drive is based on gear-driven principle, by focusing ring rotate through a pair intermeshing roller gear and conical gear is delivered on the drive motors outside guard shield, what can realize the manual focusing lens is automatically controlled, makes it to be more suitable for video security monitoring equipment; Meanwhile, the camera lens retaining mechanism in the utility model device can adapt to the camera lens of various outer diameter size within the specific limits, and structure is simple, and locking effect is reliable, possesses certain interchangeability and versatility.
Description
Technical field
The utility model belongs to safety monitoring technical field, is specifically related to a kind of focal length adjustment device of video imaging apparatus.
Background technology
The current long-distance video imaging device for safety monitoring, in order to improve operating distance and definition, mostly have employed telephoto lens and active laser lighting source.Tripod head equipment is installed simultaneously for realizing the monitoring to diverse location and different angles.Design for safety monitoring video imaging system is mainly according to the actual conditions of the monitored object type selecting to image camera and lighting source.
Along with the development of photoelectron technology and universal, alternative versatility video camera price constantly reduces on the market, and image quality improves gradually, and the more universal household video camera product of polytypic all can meet the demand in video security monitoring field.But mostly the camera lens of focal length versatility video camera is manual adjustments, and the telephoto lens cost of motorized adjustment is high, kind is few, which has limited its application on video security monitoring equipment.And long-distance video security device is often installed on building, tower masthead end, manual adjustments cannot be carried out.Therefore, good in the urgent need to a kind of versatility, modular lens focus adjusting device, realizes the automatic adjustment to general camera lens.
Chinese patent CN 200620053760 discloses " a kind of lens focus regulating structure of camera ", before this structure mainly relies on camera lens, design and installation increases a kind of specific mechanism to regulate focusing ring and focusing ring, change lens focus, regulate shooting clear and the camera lens of different length size can be adapted to.But this structure needs to carry out specialized designs for close-up, poor universality, and the camera lens different for radial dimension cannot accomplish self adaptation.Therefore, for the deficiencies in the prior art, design a kind of versatility good, flexible and convenient to use, and the focal length adjustment device of different size camera lens can be adapted to.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the utility model provides a kind of lens adjustment device for the use of long-distance video imaging device, be arranged on general camera lens, can realize in the outer control to lens focusing ring, focusing ring and aperture of the protective cover of security device.By installing drive motors, then can realize remote lens control.Solve the adjustment problem that commercially available manual telephoto lens is applied on safety monitoring equipment.
The focal length adjustment device of long-distance video imaging device of the present utility model, includes torque motor, and is the power of rotation straight spur gear A by the power-conversion of torque motor by conical gear B, conical gear A and straight spur gear B; Lens focusing ring is rotated by straight spur gear A.
Preferred as embodiment, the power output shaft of described torque motor is perpendicular to lens axis;
Further, the power output shaft of torque motor is fixedly installed togather by flat key and conical gear B.
Described conical gear A and conical gear B is two reference diameters, modulus and the identical bevel gear of profile of tooth pressure angle, and its reference cone angle is 45 °
Power output shaft and the straight spur gear B of described conical gear A are fixedly installed togather, and the gear of straight spur gear B is meshed with the gear of straight spur gear A
Preferred as embodiment, straight spur gear A is sleeved on lens focusing ring, locks lens focusing ring by self-locking tensioner ring.
As a kind of selection of embodiment, the lozenges of described self-locking tensioner ring is pressed on the lozenges of straight spur gear A by binding ring.
Preferred as embodiment, binding ring is fixed on straight spur gear A by bolting on.
The rotation indifference of the manual focusing lens is delivered on the drive motors outside guard shield by gear drive by the utility model, and what can realize the manual focusing lens is program control.The ad hoc structure of self-locking tensioner ring can be applicable to the camera lens of various outer diameter size within the specific limits, has good versatility and interchangeability.
Accompanying drawing explanation
Fig. 1: the general structure cutaway view of focal length adjustment device of the present utility model;
Fig. 2: the stereogram of focusing ring locking device in focal length adjustment device of the present utility model;
Wherein: 1 be straight spur gear A, 2 be telephoto lens, 3 for binding ring, 4 for bolting on, 5 be self-locking tensioner ring, 6 be straight spur gear B, 7 be conical gear A, 8 be conical gear B, 9 be flat key, 10 be torque motor, 11 for lens focusing ring.
Embodiment
The utility model devises a kind of focusing ring gripping mechanism with auto-lock function, can lock the camera lens of different radial dimension.Simultaneously based on gear drive by the drive motors output shaft that is delivered to the rotary motion of lens focusing ring outside guard shield, achieve the remote adjustment to versatility camera lens.
Lens focusing device of the present utility model, is made up of drive gear mechanism and focusing ring retaining mechanism two major parts.The feature of drive gear mechanism is the cooperation by a pair spur gear wheel, the rotation that lens focus regulates is delivered on the pinion shaft parallel with lens axis by gear wheel indifference, and drive a pair intermeshing conical gear, thus be on the motor output shaft vertical with lens axis by conversion of motion, so just achieve the far distance controlled of lens focusing ring under the driving of motor.
The feature of focusing ring retaining mechanism is big column spur gear side to be processed into the conical surface, devises the self-locking tensioner ring that a section is wedge shape simultaneously, ensures its wedge-shaped surface and big column gear conical surface no-float by processing.The feature of self-locking tensioner ring is that it is the non-enclosed circular ring structure of a side opening, will tighten internal diameter gradually, and being stuck in securely on lens focusing ring when moving along wedge-shaped surface.
Below in conjunction with accompanying drawing, adjusting device of the present utility model is described further.
A kind of imaging device lens focus adjusting device as shown in Figure 1, this device is made up of retaining mechanism and transmission mechanism two parts.Lock portion comprises binding ring 3, bolts on 4, straight spur gear A 1 and self-locking tensioner ring 5.Straight spur gear A1 is enclosed within side, telephoto lens 2 focusing ring position, pushes from other side by the lozenges horizontal direction of self-locking tensioner ring 5 along straight spur gear A1.The lozenges of straight spur gear A1 and the wedge-shaped surface no-float of self-locking tensioner ring 5 is ensured by machining, binding ring 3 is pressed on the end face of self-locking tensioner ring 5, by regulate bolt on 4 and lozenges effect under, the internal diameter of self-locking tensioner ring 5 will be locked gradually, under the effect of reaction force, together with telephoto lens 2 and straight spur gear A1 have been connected in by self-locking tensioner ring 5.
Running part comprises straight spur gear A1, straight spur gear B6, conical gear A7, conical gear B8, and flat key 9 and torque motor 10 form.Torque motor is driving element, and its output shaft is fixed together with conical gear B8 by flat key 9.Conical gear A7 and conical gear B8 is two identical bevel gears, and reference cone angle is 45 °, which ensure that two bevel gears can realize the transmission of 90 ° of crossed axis angles.The other end of conical gear A7 axle is straight spur gear B6, and this gear engages with straight spur gear A1, regulates the requirement of sensitivity, can provide the rational straight spur gear B number of teeth and reference diameter according to motor speed and focusing.
By this utility model focal length adjustment device, Long-distance Control is carried out to the Tonika AT-X PRO FX manual adjustments type telephoto lens be encapsulated in sub-peace YA4218 type guard shield.The focus adjustment ring diameter of this camera lens is φ 94mm, and focusing ring is 104mm, and owing to have employed active illumination, aperture is without the need to regulating.Guard length is 600mm, and inner width is 380mm, can hold and comprise camera lens, camera and illumination laser.Operation principle as above, design self-locking tensioner ring is of a size of φ 96mm, straight spur gear A reference diameter 120mm, and the number of teeth is 60, and modulus is 2, and the wedge angle matched with expansion loop is 45 ° ± 15 '.Straight spur gear B reference diameter is 30, the number of teeth 20, and modulus is 2.The reference diameter 50mm of conical gear A, the number of teeth is 25, and modulus is 2.For ensureing the steadily meticulous of focus adjustment, the facewidth is 15mm, and addendum angle is 45 °.Conical gear B and conical gear A is completely the same.Whole geared portions can be arranged on protective cover inside, at protective cover side opening φ 10 circular hole, by the transmission flat key of 4 × 2, motor shaft and bevel gear be fixed together.
Retaining mechanism in the utility model patent can hold the diameter of lens of different size within the specific limits, has certain versatility.Based on same structure, on the focusing ring that the utility model device also can install telephoto lens and preset aperture ring, what realize other camera lens parameters is automatically controlled.
Claims (8)
1. the focal length adjustment device of a video imaging apparatus, include torque motor (10), and by conical gear B(8), conical gear A(7) and straight spur gear B(6) be rotation straight spur gear A(1 by the power-conversion of torque motor (10)) power; By straight spur gear A(1) rotate lens focusing ring (11).
2. focal length adjustment device as claimed in claim 1, is characterized in that, the power output shaft of described torque motor (10) is perpendicular to the axis of camera lens (2).
3. focal length adjustment device as claimed in claim 2, is characterized in that, the power output shaft of described torque motor (10) is by flat key (9) and conical gear B(8) be fixed together.
4. the focal length adjustment device as described in claim 1 or 3, is characterized in that, described conical gear A(7) with conical gear B(8) reference cone angle be 45 °.
5. focal length adjustment device as claimed in claim 4, it is characterized in that, described conical gear A(7) power output shaft and straight spur gear B(6) be fixedly installed togather, straight spur gear B(6) gear and straight spur gear A(1) gear be meshed.
6. focal length adjustment device as claimed in claim 4, is characterized in that, described straight spur gear A(1) be sleeved on lens focusing ring (11), lock lens focusing ring (11) by self-locking tensioner ring (5).
7. focal length adjustment device as claimed in claim 6, is characterized in that, the lozenges of described self-locking tensioner ring (5) is pressed in straight spur gear A(1 by binding ring (3)) lozenges on.
8. focal length adjustment device as claimed in claim 7, it is characterized in that, described binding ring (3) is fixed on straight spur gear A(1 by bolt on (4)) on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520402267.3U CN204681480U (en) | 2015-06-11 | 2015-06-11 | A kind of video imaging apparatus focal length adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520402267.3U CN204681480U (en) | 2015-06-11 | 2015-06-11 | A kind of video imaging apparatus focal length adjustment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204681480U true CN204681480U (en) | 2015-09-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520402267.3U Expired - Fee Related CN204681480U (en) | 2015-06-11 | 2015-06-11 | A kind of video imaging apparatus focal length adjustment device |
Country Status (1)
| Country | Link |
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| CN (1) | CN204681480U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627943A (en) * | 2018-07-06 | 2018-10-09 | 中国科学技术大学 | A kind of broadband hot spot focusing device suitable for ultra-high vacuum environment |
-
2015
- 2015-06-11 CN CN201520402267.3U patent/CN204681480U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627943A (en) * | 2018-07-06 | 2018-10-09 | 中国科学技术大学 | A kind of broadband hot spot focusing device suitable for ultra-high vacuum environment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20160611 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |