TWI818767B - Blade structure and lens device - Google Patents

Abstract

A blade structure includes a blade base and at least one blade. The blade base includes an opening, at least one cantilever located beside the opening, and at least one first limiting portion located on the at least one cantilever. The at least one blade is movably disposed on the blade base to cover or expose the opening. When the at least one blade exposes the opening, the at least one first limiting portion interferes with the at least one blade to fix a position of the at least one blade relative to the blade base.

Description

Blade structure and lens device

The invention relates to a blade structure and a lens device.

For privacy reasons, the front of the lens used in general monitors and video equipment will be equipped with an external or built-in lens cover to optionally cover the lens. Taking the built-in lens cover as an example, bumps are generally provided on the blades to increase the amount of interference with the blade seat, so that when the blade rotates away from the blade seat, it can be positioned through the friction between the blade and the blade seat. However, the protrusions on the blade also cause the blade to continuously interfere with the blade seat during rotation, causing rotational resistance and making it difficult for the blade to reach a predetermined position. In addition, the bumps on the blades are easily worn and produce plastic powder. In addition to affecting the appearance, the worn bumps also affect the positioning effect of the blades.

The present invention provides a blade structure, the blade of which can have less resistance when moving, and can reduce the probability of wear of the blade and the corresponding structure on the blade seat.

The present invention provides a lens device, which includes the above-mentioned blade structure.

A blade structure of the present invention includes a blade seat and at least one blade. The blade seat includes an opening, at least one cantilever located next to the opening, and at least one first limiting portion located on the at least one cantilever. At least one blade is movably disposed on the blade seat to cover or expose the opening. When at least one blade is exposed to the opening, at least one first limiting portion interferes with the at least one blade to fix the position of the at least one blade relative to the blade seat.

A lens device of the present invention includes a lens holder, a lens, the above-mentioned blade structure and a shutter ring. The lens is arranged in the lens holder. The blade structure is arranged on one side of the lens holder, and the opening of the blade holder corresponds to the lens. The shutter ring is connected to at least one blade and is rotatably disposed on the lens base. When the shutter ring is rotated, the shutter ring drives at least one blade to move relative to the blade base to shield or expose the lens.

Based on the above, the blade structure of the present invention is provided with a cantilever and a first limiting portion on the blade seat. Since the first limiting portion used to interfere with the blade is provided on the cantilever, the cantilever can move backward during the movement of the blade relative to the blade seat to prevent the blade from interfering with the first limiting portion during movement and causing wear. When the blade is exposed to the opening and moves to the position, the cantilever arm will automatically return to allow the first limiting portion to interfere with the blade. Therefore, the blade can stay at a desired position relative to the blade seat. The above design can enable the blades to have less resistance when moving, move smoothly, and reduce the probability of the blades and/or the blade seats being worn during the movement of the blades relative to the blade seats.

FIG. 1 is a schematic diagram of a lens device according to an embodiment of the present invention. Please refer to FIG. 1 . The lens device 10 of this embodiment is used in monitors or video equipment, for example. However, the application types of the lens device 10 are not limited thereto. In other embodiments, the lens device 10 of this embodiment can also be used in monitors or video equipment. Can be applied to digital cameras.

Figure 2 is an exploded view of Figure 1. Referring to FIG. 2 , the lens device 10 of this embodiment includes a lens holder 20 , a lens 25 , a magnet holder 30 , a blade structure 100 , an inner lens frame 40 , a shutter ring 50 and a lens glass 60 .

The lens 25 is installed in the lens holder 20 , and the lens holder 20 is used to accommodate the lens 25 . The magnet holder 30 is disposed on one side of the lens holder 20 and is used to dispose the magnet 32 . The magnet 32 is used to trigger a Hall sensor (not shown) to enable the camera function of the lens 25 . The blade structure 100 is disposed on one side of the lens holder 20 and covers the magnet holder 30 . The blade structure 100 includes a blade seat 110 and at least one blade 120. The opening 112 of the blade seat 110 corresponds to the lens 25. The blade 120 is movably disposed on the blade seat 110 to cover or expose the opening 112 to protect the lens 25 from dust. The lens inner frame 40 is disposed on the blade holder 110 to fix the blade 120 . The shutter ring 50 is connected to the blade 120 and is rotatably disposed on the lens holder 20 . When the shutter ring 50 is rotated, the shutter ring 50 drives the blade 120 to move relative to the blade holder 110 to shield or expose the lens 25 . At the same time, the shutter ring 50 also drives the magnet holder 30 to rotate. The lens glass 60 is provided on the shutter ring 50 to protect the covered components.

The blade structure 100 of this embodiment has a special design, which allows the blade 120 to have less resistance when moving relative to the blade seat 110 and reduces the wear of the blade 120 during the movement of the blade 120 relative to the blade seat 110 or/and the probability of blade seat 110. This is explained below.

3 and 4 are schematic diagrams of the operation of the blade structure of the lens device in FIG. 1 . FIG. 5 is a partial perspective view of FIG. 3 . FIG. 6 is a partial cross-sectional view of FIG. 3 . It should be noted that in order to clearly see the details, in FIGS. 3 and 4 , the blade seat 110 of the blade structure 100 is represented by a dotted line, and the blade 120 is represented by a solid line. In FIG. 5 , the upper blade 120 is shown with a dotted line to expose the rear structure, and the blade seat 110 is shown with a solid line.

Please refer to FIGS. 3 to 6 . In this embodiment, the blade seat 110 of the blade structure 100 includes an opening 112 ( FIG. 4 ), at least one cantilever 114 ( FIG. 5 ) located next to the opening 112 and a cantilever 114 located on the at least one cantilever 114 . At least one first limiting portion 116 (Fig. 5). As shown in FIG. 5 , the blade seat 110 is dug with at least one U-shaped slot 118 to surround at least one cantilever 114 , and each first limiting portion 116 is located at the end of the corresponding cantilever 114 .

Specifically, in this embodiment, since the blade structure 100 may include two blades 120, at least one U-shaped slot 118 of the blade seat 110 may include two U-shaped slots 118, and at least one cantilever 114 may include two cantilevers. 114. At least one first limiting part 116 may include two first limiting parts 116. Two U-shaped slots 118 , two cantilevers 114 and two first limiting portions 116 are located near the upper right and lower left of the opening 112 for positioning the two blades 120 .

Furthermore, in this embodiment, at least one blade 120 includes two blades 120 . The two blades 120 jointly cover or expose the opening 112 . The two blades 120 are rotatably arranged on the blade seat 110 . In this embodiment, the opening 112 is in the shape of a rectangle, and the two rotating axes 126 of the two blades 120 are located next to the two opposite corners (the upper left corner and the lower right corner) of the rectangle. When the two blades 120 cover the opening 112, the seam between the two blades 120 corresponds to the diagonal line of the rectangle.

When each blade 120 covers the opening 112 , the corresponding first limiting portion 116 abuts against the edge of the blade 120 . Specifically, in this embodiment, when the two blades 120 cover the opening 112, the two first limiting portions 116 are respectively in contact with the upper edge of one of the two blades 120 and the lower edge of the other of the two blades 120. edge to fix the position of the two blades 120 relative to the blade seat 110 to prevent the lower blade 120 from unintentionally rotating downward due to gravity.

When each blade 120 is exposed from the opening 112 , the corresponding first limiting portion 116 interferes with the blade 120 to fix the position of the blade 120 relative to the blade seat 110 . Specifically, as shown in FIG. 6 , each blade 120 includes an inner surface 122 facing the blade seat 110 and a second limiting portion 124 located on the inner surface 122 . In this embodiment, the first limiting part 116 is a convex part, and the second limiting part 124 includes at least one concave part. Each blade 120 is aligned with the corresponding first limiting part 116 through the second limiting part 124. The blade seats 110 interfere with each other for more reliable positioning.

It can be seen from Fig. 5 and Fig. 6 that since the blade 120 rotates around the rotating shaft 126, the second limiting portion 124 has a concave-convex structure extending along an arc. The concave-convex structure has a plurality of concave portions for engaging the first limiting portion. 116 so that the blade 120 can selectively stay in one of the positions relative to the blade seat 110 . Of course, the types of the first limiting part 116 and the second limiting part 124 are not limited thereto.

Since the first limiting portion 116 used to interfere with the blade 120 is provided on the cantilever 114, when the blade 120 moves relative to the blade seat 110, the cantilever 114 can move backward to prevent the blade 120 from interfering with the first limiting portion during the movement. Part 116 interferes excessively, causing wear. Therefore, the blade 120 can have less resistance when moving, and the probability of the blade 120 wearing the first limiting part 116 and the second limiting part 124 during the movement relative to the blade seat 110 is reduced.

In addition, when the blade 120 moves to the position, the cantilever 114 will automatically return, so that the first limiting portion 116 can interfere with the second limiting portion 124 on the blade 120 . Therefore, the blade can stay in the desired position relative to the blade seat to achieve accurate positioning.

To sum up, the blade structure of the present invention is provided with a cantilever and a first limiting part on the blade seat. Since the first limiting part used to interfere with the blade is provided on the cantilever, when the blade moves relative to the blade seat, the cantilever can retreat backward to avoid excessive interference with the first limiting part during the movement of the blade, causing wear. . When the blade is exposed to the opening and moves to the position, the cantilever arm will automatically return to allow the first limiting portion to interfere with the blade. Therefore, the blade can stay at a desired position relative to the blade seat. The above design can enable the blades to have less resistance when moving, move smoothly, and reduce the probability of the blades and/or the blade seats being worn during the movement of the blades relative to the blade seats.

10:Lens device

20: Lens holder

25: Lens

30:Magnet holder

32: Magnet

40: Lens inner frame

50:Shutter ring

60: Lens glass

100:Blade structure

110:Blade seat

112:Open your mouth

114:Cantilever

116: First limiting part

118:U-shaped slotted hole

120: blade

122:Inner surface

124: Second limit part

126:Rotating axis

FIG. 1 is a schematic diagram of a lens device according to an embodiment of the present invention. Figure 2 is an exploded view of Figure 1. 3 and 4 are schematic diagrams of the operation of the blade structure of the lens device in FIG. 1 . FIG. 5 is a partial perspective view of FIG. 3 . FIG. 6 is a partial cross-sectional view of FIG. 3 .

110:Blade seat

114:Cantilever

116: First limiting part

118:U-shaped slotted hole

120: blade

124: Second limit part

126:Rotating axis

Claims (10)

A blade structure for shielding or exposing a lens. The blade structure includes: a blade base, including an opening, at least one cantilever located next to the opening, and at least one first limiting portion located on the at least one cantilever. The opening corresponds to the lens; and at least one blade is movably disposed on the blade seat to cover or expose the opening. When the at least one blade exposes the opening, the at least one first limiting portion interferes with the at least one blade. , to fix the position of the at least one blade relative to the blade seat. The blade structure of claim 1, wherein each blade includes an inner surface facing the blade seat and a second limiting portion located on the inner surface, and each blade communicates with the blade through the second limiting portion. The first limiting portions of the seats interfere with each other. The blade structure of claim 2, wherein the first limiting part is a convex part, and the second limiting part includes at least one concave part. The blade structure of claim 2, wherein each blade is rotatably disposed on the blade seat, and the second limiting portion has a concave-convex structure extending along an arc. The blade structure of claim 1, wherein when each blade blocks the opening, the corresponding first limiting portion abuts against an edge of the blade. The blade structure of claim 1, wherein the blade seat is dug with at least one U-shaped slot to surround the at least one cantilever, and each first limiting portion is located at the end of the corresponding cantilever. The blade structure of claim 1, wherein the at least one blade includes two blades, the two blades jointly cover or expose the opening, and the at least one cantilever includes two Cantilever, the at least one first limiting part includes two first limiting parts. When the two blades cover the opening, the opening is in a rectangular shape, and the seam between the two blades corresponds to the diagonal line of the rectangle. The blade structure of claim 7, wherein when the two blades cover the opening, the two first limiting parts are respectively in contact with the upper edge of one of the two blades and the other of the two blades. lower edge. The blade structure as claimed in claim 7, wherein the two blades are rotatably arranged on the blade seat, and the two rotating axes of the two blades are located at two opposite corners of the rectangle. A lens device, including: a lens holder; a lens arranged in the lens holder; a blade structure as described in any one of claims 1 to 9, arranged on one side of the lens holder, and the blade holder is The opening corresponds to the lens; and a shutter ring is connected to the at least one blade and is rotatably disposed on the lens base. When the shutter ring is rotated, the shutter ring drives the at least one blade to move relative to the blade base. , to cover or expose the lens.

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