CN201210213Y

CN201210213Y - Rotary movable light shielding apparatus

Info

Publication number: CN201210213Y
Application number: CNU2008201190018U
Authority: CN
Inventors: 赖宏昱
Original assignee: Asia Optical Co Inc
Current assignee: Asia Optical Co Inc
Priority date: 2008-06-03
Filing date: 2008-06-03
Publication date: 2009-03-18
Anticipated expiration: 2018-06-03

Abstract

The utility model discloses a rotary movable shade. The rotary movement of an anti-dazzling screen along two groups of the masking frames is adopted; when the lens stays at the collection status, the anti-dazzling screen opens a notch, so as to leave the collection position; when the lens stays at the wide-angle status, the anti-dazzling screen closes the notch and shields the light. The shade resolves the light leakage phenomenon that is easy to happen between the notch of two groups of the light shielding cylinder and the straight-in cylinder when the lens stays at the wide-angle status, and the anti-dazzling screen prevents the light that is reflected by a group of outer cylinder from entering in, thereby effectively improving the imaging quality.

Description

Turn round movable shade

Technical field

The utility model relates to lens construction, more particularly, relates to a kind of movable shade of revolution that is used for camera lens.

Background technology

Lightening along with electronic product, miniature zoom lens is widely used in various imaging devices, for example camera, video camera, mobile phone or similar devices.Usually, all need set up light shield in the lens group periphery in camera lens, in shooting process, incide on the camera lens, reduce image quality to prevent unnecessary scattered beam.

Fig. 1 shows a kind of lens construction of the prior art.As shown in Figure 1, though support two groups of frames 16 of second lens group to be equiped with two groups of cones 18 outward, but when camera lens is operated to wide-angle position, two groups of cones 18 stretch out with respect to directly advancing tube 14, part light can be through the reflection of a group urceolus 20 inwalls, and enter lens barrel inside (shown in the figure arrow line) by the slit that is used for taking in the breach 22 of action shaft 12 on two groups of cones 18 and directly advance between the tube 14, produce light leak.This situation just can veiling glare occur in image, influence image quality.

The utility model content

The technical problems to be solved in the utility model is, at the above-mentioned defective of prior art, provide a kind of revolution movable shade, when taking in, camera lens dodges out two groups of breach on the cone in opened condition, when camera lens stretches out, be closure state and cover breach, enter to prevent light.

The technical scheme that its technical matters that solves the utility model adopts is: provide a kind of revolution movable shade, comprise an anti-dazzling screen, place two groups of masking frames and directly advance on two groups of masking frame breach between the tube; Described anti-dazzling screen comprises installation portion and downward extended light shielding part and drive division from the installation portion both sides, described installation portion buckles the upper end at two groups of cones, the lower end of described drive division is the inclined-plane, with when camera lens is flexible and the link stopper that is provided with on the diameter tube inwall lean, and be hung with spring between described anti-dazzling screen and the described two groups of masking frames.When camera lens is in the wide-angle state, described two groups of masking frames and anti-dazzling screen stretch out with respect to directly advancing tube, the link stopper on the diameter tube inwall and the lower end, inclined-plane of described anti-dazzling screen drive division offset, described camber of spring to the first extended state drives described anti-dazzling screen and rotates and closed breach along two groups of cones; When camera lens is in receiving state, described two groups of masking frames and anti-dazzling screen indentation are directly advanced in the tube, link stopper on the diameter tube inwall drives described anti-dazzling screen and returns back to along two groups of cones and make a breach described camber of spring to the second extended state along the inclined-plane of described anti-dazzling screen drive division.

Implement the movable shade of revolution of the present utility model, have following beneficial effect: this shade utilizes the gyration of anti-dazzling screen along two groups of masking frames, and when camera lens was in receiving state, anti-dazzling screen was made a breach and dodged out reception position; When camera lens is in the wide-angle state, the entering of the closed breach of anti-dazzling screen and shield lights.Thereby this shade eliminated the breach of two groups of cones of wide-angle state and directly advanced the light leakage phenomena that is prone between the tube, and anti-dazzling screen prevents that the light of a group urceolus reflection from entering, thereby has improved image quality effectively.And this shade can be used in a class start narrow space and the big part of light leak opening, only needs original camera lens inner structure is done small change, and can not produce any influence to Lens, thereby be particularly useful for various small-sized camera lenses.

Description of drawings

Fig. 1 is a lens construction synoptic diagram of the prior art;

Fig. 2 is the structural representation of the anti-dazzling screen of an embodiment of the utility model;

Fig. 3 is the anti-dazzling screen of an embodiment of the utility model and the assembling synoptic diagram of two groups of masking frames;

Fig. 4 is the structural representation of the anti-dazzling screen closure state of an embodiment of the utility model;

Fig. 5 is the structural representation of the anti-dazzling screen open mode of an embodiment of the utility model;

Fig. 6 is the structural representation of shade when camera lens is in receiving state among embodiment of the utility model;

Fig. 7 is the structural representation of shade when camera lens is in the wide-angle state among embodiment of the utility model.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

Utilize anti-dazzling screen according to the movable shade of the revolution of the utility model embodiment, do the gyration of local angle along two groups of cones, when camera lens is taken in, utilize and directly advance the link stopper driving anti-dazzling screen rotation that an inwall is provided with, be the state of making a breach, take in interference position to dodge; And camera lens utilizes when stretching out the spring that stretches to make the anti-dazzling screen revolution and closed breach enters easy light leak place to reach shield lights.

Concrete is the structural representation of the anti-dazzling screen 30 among embodiment of the utility model as shown in Figure 2.Anti-dazzling screen 30 mainly by installation portion 310 and from installation portion 310 both sides downward extended light shielding part 306 and drive division 308 form, form the part face of cylinder.Installation portion 310 is circumferentially with protruding rib 304 along its inwall, and the end near drive division 308 extends first hook 302 downwards on the protruding rib 304.The lower end of drive division 308 is designed to the inclined-plane.

Fig. 3-Fig. 5 is the assembling synoptic diagram of anti-dazzling screen 30 and two groups of masking frames 18, and wherein Fig. 3 and Fig. 4 are anti-dazzling screen 30 closure states, and Fig. 5 is anti-dazzling screen 30 open modes.Anti-dazzling screen 30 buckles on the flange 184 (referring to Fig. 4) of two groups of masking frame 18 upper ends by its protruding rib 304 (referring to Fig. 2).As shown in Figure 3, the corresponding position offers chute 188 on the step 186 of two groups of masking frames 18, on the anti-dazzling screen 30 first hook 302 passes this chute 188 and stretches in two groups of masking frames 18, thus at anti-dazzling screen 30 when two groups of masking frames 18 rotate, first hook 302 moves along this chute 188.And, extend second hook 182 on step 186 lower surfaces of two groups of masking frames 18 downwards.The two ends of spring 24 are suspended on respectively on first hook, 302 and second hook 182, make anti-dazzling screen 30 when doing the rotation of local angle around the breach 22 of two groups of masking frames 18, are subjected to the traction of spring 24.As shown in Figure 4, when anti-dazzling screen 30 desires were made closure state, promptly camera lens was when the wide-angle state, and anti-dazzling screen 30 can clockwise rotate (shown in arrow among Fig. 4), makes light shielding part 306 cover breach 22, and this moment, spring 24 was in first extended state (referring to Fig. 3).Among Fig. 3, anti-dazzling screen 30 is in closure state, and first on the anti-dazzling screen 30 hook 302 moves to the position of the hook of second on the most close two groups of masking frames 18 182 along chute 188, makes the tensile force minimum that spring 24 is subjected to, and spring 24 is in first extended state.As shown in Figure 5, when anti-dazzling screen 30 desires were made open mode, promptly camera lens was when receiving state, and anti-dazzling screen 30 is understood turning anticlockwises (shown in arrow among Fig. 5), thereby light shielding part 306 is dodged out breach 22 from breach 22 toward counterclockwise removing, so that take in.At this moment, because anti-dazzling screen 30 turning anticlockwises, on the anti-dazzling screen 30 first hook 302 oppositely moves to along chute 188 and links up with 182 position away from second on two groups of masking frames 18, make the tensile force maximum that spring 24 is subjected to, spring 24 be in the second extended state (not shown) bigger than the first extended state sex change.Because greater than first extended state, thereby the tractive force that spring 24 recovers elastic deformations makes anti-dazzling screen 30 to be back to closure state from open mode to spring 24 in the elastic deformation of second extended state.

The turning anticlockwise of anti-dazzling screen 30 was realized by the drive division 308 that directly advances the link stopper 142 driving anti-dazzling screens 30 that are provided with on tube 14 inwalls when desire was made receiving state, as shown in Figure 6 and Figure 7.Wherein, Fig. 6 is that camera lens is in anti-dazzling screen under the receiving state (being the anti-dazzling screen open mode) 30, two groups of masking frames 18 and directly advances cooperation synoptic diagram between the tube 14, and Fig. 7 then is that camera lens is in the cooperation synoptic diagram between the three under the wide-angle state (being the anti-dazzling screen closure state).As shown in Figure 6, under the receiving state, as previously mentioned, anti-dazzling screen 30 turn-ofves and dodge out breach 22, spring between the anti-dazzling screen 30 and the two groups of masking frames 18 is in second extended state, this moment, link stopper 142 was resisted against the outside, upper end, inclined-plane of drive division 308, and with the elastic deformation of the spring that contends with, prevention anti-dazzling screen 30 is subjected to the elastic force effect of spring and turns round.Extend out to gradually in the process of wide-angle state at camera lens, anti-dazzling screen 30 is protruding with respect to directly advancing tube 14 with two groups of masking frames 18, the inclined-plane of the drive division 308 of anti-dazzling screen 30 promptly breaks away from the restriction of link stopper 142 gradually, revolution clockwise under the elastic force effect of spring 24 makes light shielding part 306 move toward clockwise direction gradually.When camera lens extend out to the wide-angle state, as shown in Figure 7, anti-dazzling screen 30 returns back to the position that its light shielding part 306 just in time covers breach 22, and this moment, link stopper 142 was resisted against the lower end, inclined-plane of the drive division 308 of anti-dazzling screen 30, and the spring between the anti-dazzling screen 30 and the two groups of masking frames 18 is in first extended state.Be retracted to gradually the process of receiving state from the wide-angle state at camera lens, anti-dazzling screen 30 with two groups of masking frames 18 with respect to directly advance the tube 14 indentations inwards, the thrust that the inclined-plane of link stopper 142 by the drive division 308 that moves down gradually produces to the right anti-dazzling screen 30, drive anti-dazzling screen 30 and overcome the elastic force of spring toward counterclockwise rotating, light shielding part 306 until anti-dazzling screen 30 is dodged out breach 22, as shown in Figure 6.

The shade of the utility model embodiment utilizes the gyration of anti-dazzling screen along two groups of masking frames, and when camera lens was in receiving state, anti-dazzling screen was made a breach and dodged out reception position; When camera lens is in the wide-angle state, the entering of the closed breach of anti-dazzling screen and shield lights.Thereby this shade eliminated the breach of two groups of cones of wide-angle state and directly advanced the light leakage phenomena that is prone between the tube, and anti-dazzling screen prevents that the light of a group urceolus reflection from entering, thereby has improved image quality effectively.And this shade can be used in a class start narrow space and the big part of light leak opening, only needs original camera lens inner structure is done small change, and can not produce any influence to Lens, thereby be particularly useful for various small-sized camera lenses.

Claims

1, the movable shade of a kind of revolution is characterized in that, comprises an anti-dazzling screen, places two groups of masking frames and directly advances on two groups of masking frame breach between the tube; Described anti-dazzling screen comprises installation portion and downward extended light shielding part and drive division from the installation portion both sides, described installation portion buckles the upper end at two groups of cones, the lower end of described drive division is the inclined-plane, with when camera lens is flexible and the link stopper that is provided with on the diameter tube inwall lean, and be hung with spring between described anti-dazzling screen and the described two groups of masking frames.

2, the movable shade of revolution according to claim 1 is characterized in that, the installation portion of described anti-dazzling screen is provided with protruding rib along its inwall, buckles on the flange of two groups of masking frame upper ends.

3, the movable shade of revolution according to claim 2, it is characterized in that, described protruding rib extends first hook that is used for pendulum spring downwards corresponding to an end of drive division, described first hook passes the arc chute that is provided with on the step of two groups of masking frames, and described step lower surface is provided with second hook that is used to hang described spring accordingly.