TWI671563B - An improved structure of filter holder - Google Patents

Abstract

An improved filter holder structure includes a filter holder body and a filter box. The filter holder body includes a card slot portion and a filter holder pivoting portion. The card slot portion has a card slot portion opening. The pivot portion of the filter frame is disposed on a rear side of the filter frame body, and the pivot portion of the filter frame is for pivotal connection with a lens of a camera. The filter case has a filter fixing portion, and a rear filter is fixed to the filter fixing portion. The filter case is inserted into the slot portion from the slot opening and fixed to the slot portion.

Description

Improved filter holder structure

The invention relates to an improved structure of a filter holder, which refers to an improved structure of a filter holder with a removable filter case.

Please refer to FIG. 9A, which is a specific embodiment of a filter holder of the conventional technology. A filter holder 90 includes a connecting member 91 and a fixing portion 94. The connecting member 91 has a rear screw portion 93 for screwing with a lens of a camera. The fixing portion 94 is used for clamping and fixing a front filter 92. Please refer to FIG. 9B, which is a partial enlarged view of part X of FIG. 9A. When the front filter 92 is clamped and fixed to the filter holder 90 by the fixing portion 94, there is a gap 95 between the front filter 92 and the filter holder 90. In the design of the filter holder 90, a gap 95 is necessary. Because without this gap 95, when the front filter 92 is to be inserted into the fixed portion 94 of the filter holder 90, the front filter 92 will directly rub against the filter holder 90, which will cause the front filter 92 to wear. Please refer to FIG. 9C, which is a photo taken by a specific embodiment of a filter holder using the conventional technique of FIG. 9A. The previous filter 92 is a Neutral Density Filter (Neutral Density Filter) with a high ND (Neutral Density) value, and the photos (as shown in Figure 9C) will have a camera lens The reflected image appears. The reason is that a high ND neutral gray filter is a filter with very low transmittance (looks like a black lens), and its surface has a relatively high reflectance. Therefore, when using a high ND value When the neutral gray filter is used, if the light leaks from the gap 95 into the high ND neutral gray filter and the camera lens, the camera lens will be illuminated by the leaked light and the resulting image will be high. The neutral gray filter of the ND value is reflected back into the camera lens and is imaged on a photosensitive element of the camera. Therefore, a reflected image of the camera lens appears in the photograph (as shown in FIG. 9C).

Please refer to FIG. 9E and FIG. 9F, which are another specific embodiment of the filter holder of the conventional technology. The main structure of this embodiment is substantially the same as the embodiment shown in FIG. 9A, except that the connecting member 91 further includes a front threaded portion 96. The front screw portion 96 is used to fix a rear filter 97 between the camera lens and the front filter 92. When the rear filter 97 with a neutral gray filter having a high value is to be used, since there is no gap between the rear filter 97 and the camera lens, the aforementioned light does not leak into the high ND value from the gap. The problem between the neutral gray filter and the camera lens arises. However, if the camera lens used is an ultra-wide-angle lens, vignetting (or vignetting) occurs at the four corners of the photo, resulting in darker four corners and uneven brightness of the photo. The reason is that, when an ultra-wide-angle lens is generally used, if a filter is to be screwed on the camera lens, the filter must be a thin-frame filter. Because if you do n’t use a thin frame filter, the thickness of the general frame filter is too thick, and some of the incident light will be blocked around the frame, making the corners of the photo dark. The embodiments of FIG. 9E and FIG. 9F can solve the aforementioned problem between the light leaking from the gap into the high-ND neutral gray filter and the camera lens, but they are not suitable for use with ultra-wide-angle camera lenses.

In addition, in the embodiments of FIGS. 9E and 9F, if the filter used is a circular polarizer filter, each time the circular polarizer filter needs to be rotated, the original setting must be set. Before the position and angle of the filter 92 is moved, the ring polarizing filter can be rotated. After the ring polarizing filter is rotated, the position and angle of the front filter 92 must be reset. In this way, it is inconvenient to use.

In view of this, the inventors have developed a simple assembly design that can avoid the above-mentioned disadvantages, is more convenient to use, and has the advantages of low cost, taking into account considerations such as use flexibility and economy, so the invention has emerged.

There are three technical problems to be solved by the present invention: 1. Avoiding the leakage of light from the gap into the gap between the high ND neutral gray filter and the camera lens; 2. Suitable for use with ultra-wide-angle camera lenses; 3. Convenient for use with ring polarizing filters.

In order to achieve the above object, the present invention provides an improved structure of a filter holder, which includes a filter holder body and a filter box. The filter holder body includes: a card slot portion and a filter holder pivoting portion. The card slot portion has a card slot portion opening. The pivot portion of the filter frame is disposed on a rear side of the filter frame body, and the pivot portion of the filter frame is for pivotal connection with a lens of a camera. The filter case has a filter fixing part, and a rear filter is fixed to the filter fixing part. The filter case can be inserted into the card slot part through the opening of the card slot part, and is fixed on the card slot part.

During implementation, it further includes a connecting piece, and the connecting piece has a connecting piece pivoting portion and a connecting piece threading portion on both sides, wherein the lens has a lens threading portion, and the filter frame pivoting portion can be connected with The pivoting portion of the lens is pivotally connected, and the threaded portion of the connecting piece can be screwed with the threaded portion of the lens.

In practice, the pivotal portion of the filter frame includes a pivotal portion groove and at least one fixing portion, and the pivotal portion groove and at least one fixing portion are pivotable to the pivoting portion of the connecting member.

During implementation, the connecting member pivoting portion has a connecting member groove, and one of the at least one fixing portion of the filter holder pivoting portion can be tightly combined with the connecting member groove, thereby making the filter holder The pivot joint is tightly combined with the pivot joint of the connecting member.

During implementation, the filter fixing part is rotatable relative to the filter case, thereby enabling the rear filter to rotate relative to the filter case.

During the implementation, the filter case further includes a toggle portion, which is linked with the filter fixing portion, and a user can rotate the rear filter relative to the filter case by turning the toggle portion.

During implementation, the card slot portion further includes a first sealing portion. When the filter box is inserted into the card slot portion from the opening of the card slot portion and fixed to the card slot portion, the opening of the card slot portion is dense Together.

During implementation, the filter case further includes a second sealing portion, and the second sealing portion allows the filter case to be inserted into the card slot portion from the opening of the card slot portion and fixed to the card slot portion, so that the card slot portion opening is dense Together.

During implementation, it further includes a front filter holder, which is pivotally connected to a front side of the filter holder body by a pivot member, wherein the front filter holder includes a pair of right fixing portions and a left fixing portion. Wherein, the right fixing portion and the left fixing portion respectively have at least one pair of right fixing grooves and the left fixing groove, and each of the at least one pair of right fixing grooves and the left fixing groove is used for fixing and clamping a front filter.

During implementation, the filter fixing part has a filter box thread part, and the rear filter has a rear filter thread part, wherein the filter box thread part can be screwed with the rear filter thread part to fix the rear filter. On the filter holder.

In order to further understand the present invention, the preferred embodiments will be described in detail below with reference to the drawings and figures, and the specific constitutional content of the present invention and its achieved effects will be described in detail as follows.

1‧‧‧ Filter holder body

10‧‧‧ front side

11‧‧‧ rear

12‧‧‧Card slot

120‧‧‧ Card slot opening

121‧‧‧First Adhesive Department

13‧‧‧ Filter frame pivot

130‧‧‧ the first fixed part

130’‧‧‧first fixed part

131‧‧‧ Pivot groove

132‧‧‧Second fixing section

132’‧‧‧second fixed part

14‧‧‧ front filter holder

140‧‧‧Right fixing part

141‧‧‧Left fixing part

142‧‧‧ Pivot

143‧‧‧Right fixing groove

144‧‧‧left fixing groove

2‧‧‧ Filter Box

20‧‧‧ Filter fixing section

20’‧‧‧ Filter box thread

21‧‧‧ rear filter

21’‧‧‧ rear filter

210‧‧‧ rear filter thread

22‧‧‧Second Adhesion Department

23‧‧‧ holding section

24‧‧‧Rotating mechanism

25‧‧‧Pushing Department

3‧‧‧ Connector

30‧‧‧Connector pivot

31‧‧‧ Connector thread

40‧‧‧first front filter

41‧‧‧Second Front Filter

5‧‧‧ Camera

50‧‧‧ lens

51‧‧‧lens thread

90‧‧‧ filter holder

91‧‧‧Connector

92‧‧‧ front filter

93‧‧‧ rear thread (external thread)

94‧‧‧Fixed section

95‧‧‧ Clearance

96‧‧‧ Front thread (internal thread)

97‧‧‧ rear filter

FIG. 1 is a specific embodiment of an improved structure of a filter holder according to the present invention.

FIG. 2 is a combination diagram of a specific embodiment of a modified structure of a filter holder and a camera according to the present invention.

FIG. 3 is another embodiment of an improved structure of a filter holder according to the present invention.

FIG. 4 is a combination diagram of a specific embodiment of a modified structure of a filter holder and a camera according to the present invention.

FIG. 5 is another specific embodiment of an improved structure of a filter holder according to the present invention.

FIG. 6 to FIG. 8 are specific embodiments of a filter box with an improved structure of a filter holder according to the present invention.

FIG. 9A is a specific embodiment of a filter holder of the conventional technology.

Figure 9B is a partial enlarged view of part X of Figure 9A.

FIG. 9C is a photo taken by a specific embodiment of the filter holder using the conventional technique of FIG. 9A.

FIG. 9D is a photo taken by applying a specific embodiment of a modified structure of a filter holder of the present invention.

FIG. 9E and FIG. 9F are another specific embodiment of the filter holder of the conventional technology.

Please refer to FIG. 1, which is a specific embodiment of an improved structure of a filter holder according to the present invention. A filter holder includes a filter holder body 1 and a filter box 2. The filter holder body 1 includes a slot portion 12 and a filter holder pivot portion 13. The card slot portion 12 has a card slot portion opening 120 and a first contact portion 121. The filter case 2 includes a filter fixing portion 20, a second close portion 22, and a holding portion 23. The rear filter 21 is fixed to the filter fixing portion 20. The holding portion 23 is convenient for a user to hold the filter box 2. The filter box 2 can be inserted into the card slot portion 12 through the card slot portion opening 120 and is fixed to the card slot portion 12. The filter frame pivot 13 is disposed on a rear side 11 of one of the filter frame bodies 1. Please refer to FIG. 2 at the same time, which is a combination diagram of a specific embodiment of a modified structure of a filter holder and a camera of the present invention. In this embodiment, the filter holder body 1 is combined with a camera 5 through a connecting member 3. The connecting member 3 includes a connecting member pivoting portion 30 and a connecting member threaded portion 31, which are respectively disposed on two sides of the connecting member 3. A camera 5 has a lens 50, and the lens 50 has a lens threaded portion 51. The filter holder pivot 13 can be pivoted to the connector pivot 30, and the screw 31 of the connector can be screwed to the screw 51 of the lens. Thus, the filter body 1 is connected to the camera 5 through the connector 3 Combine. In this embodiment, the filter frame pivoting portion 13 includes a first fixing portion 130, a second fixing portion 132, and a pivoting portion groove 131. The first fixing portion 130 is a convex shape, so the pivoting portion 30 of the connecting member must be connected at an appropriate inclination angle by a space between the first fixing portion 130 and the groove 131 of the pivoting portion to connect the The piece pivoting portion 30 is thereby placed in the pivoting portion groove 131, and one end of the connecting piece pivoting portion 30 is fixed by the protruding first fixing portion 130. The connecting member pivotal portion 30 has a connecting member groove. The front end of the second fixing portion 132 is a thin rod, and the thin rod-shaped front end of the second fixing portion 132 can be closely fitted with the groove of the connecting member of the connecting member pivoting portion 30. A middle portion of the second fixing portion 132 has a thread. The tail end of the second fixing portion 132 is cylindrical, and the user can screw the second fixing portion 132 into a thread of the filter holder body 1 so that the thin rod-shaped front end of the second fixing portion 132 is pivotally connected to the connecting member. The groove of the connecting member of the part 30 is tightly combined and fixed. Before the thin rod-shaped front end of the second fixing portion 132 and the connecting member groove of the connecting member pivoting portion 30 are closely fitted and fixed, the filter holder body 1 can be rotated and adjusted to an appropriate angle, and then the second fixing portion 132 The thin rod-shaped front end is closely fitted and fixed with the connecting member groove of the connecting member pivoting portion 30. Wherein, the first tight contact portion 121 and the second tight contact portion 22 are designed to closely fit, so that the filter case 2 is inserted into the lock slot portion 12 from the slot opening 120 and is fixed to the slot portion 12 when the filter slot 2 is fixed to the slot portion 12. The opening 120 is tightly closed to avoid the problem of light leaking between the lens 50 and the rear filter 21 and to avoid the reflected image of the lens 50 from appearing in the photographed picture. In addition, the size of the rear filter 21 can be designed to be larger than the size of the ultra-wide-angle lens 50, which can avoid the problem of vignetting in the four corners of the photo when the ultra-wide-angle lens 50 is used. Furthermore, only one piece of filters with the same function is required, and it is not necessary to buy different size filters (filters with the same function and different sizes) for different lens sizes. In addition, the pluggable design of the filter box 2 makes it easier to remove and replace the filter, and the replacement speed is very fast. At some critical moments, you can avoid missed opportunities to take pictures.

Please refer to FIG. 3, which is another specific embodiment of an improved structure of a filter holder according to the present invention. The main structure of the filter holder body 1 in this embodiment is substantially the same as that of the filter holder body 1 in the embodiment shown in FIG. 1, but the filter holder body 1 further includes a front filter holder 14. The front filter frame 14 is pivotally connected to a front side 10 of the filter frame body 1 through a pivoting member 142. The front filter frame 14 includes a pair of right fixing portions 140 and a left fixing portion 141. Please refer to FIG. 4 at the same time, which is a combination diagram of a specific embodiment of a filter holder improved structure and a camera according to the present invention. This combination diagram is substantially the same as the combination diagram shown in FIG. 2, but the filter holder body 1 is the same as the structure of FIG. 3. The right fixing portion 140 and the left fixing portion 141 include at least a pair of right fixing grooves 143 and a left fixing groove 144, respectively. A first front filter 40 and a second front filter 41 can be inserted and fixed in the two right fixing grooves 143 and the left fixing groove 144, respectively. The pivot member 142 can be a screw.

Please refer to FIG. 5, which is another specific embodiment of the filter holder body of an improved structure of the filter holder according to the present invention. The main structure of the filter holder body 1 in this embodiment is substantially the same as that of the filter holder body 1 in the embodiment shown in FIG. 1, except that the filter holder pivot portion 13 includes a first fixing portion 130 ', A second fixing portion 132 ′ and a pivoting portion groove 131. The first fixing portion 130 'and the second fixing portion 132' are two screw knobs, respectively. One end is provided with a thread, which is a thread of the rotatable filter holder body 1. The other end is a slightly larger nut, which is convenient for users to use, and can simultaneously fix the pivot part 30 of the connector to the recess 131 of the pivot part.

Please refer to FIG. 6, which is another specific embodiment of a filter box with an improved structure of a filter holder according to the present invention. The main structure of the filter box 2 of this embodiment is substantially the same as that of the filter box 2 of the embodiment shown in FIG. 1, except that one of the rear filters 21 'has a rear filter thread portion 210, and the filter The fixing portion 20 has a filter box screw portion 20 ′. The rear filter 21 'is fixed to the filter fixing portion 20 by screwing the rear filter screw portion 210 and the filter case screw portion 20'. The rear filter 21 'is a commercially available filter, and it can be used with the filter case 2 without additional design and manufacture.

Please refer to FIG. 7, which is another specific embodiment of a filter box with an improved structure of a filter holder according to the present invention. The main structure of the filter box 2 of this embodiment is substantially the same as that of the filter box 2 of the embodiment shown in FIG. 1, but further includes a rotating mechanism 24 and a dial 25. The rotation mechanism 24 is capable of rotating the filter fixing portion 20 relative to the filter case 2, thereby enabling the filter 21 to rotate relative to the filter case 2 after being fixed on the filter fixing portion 20. The toggle portion 25 is linked with the filter fixing portion 20, and the user can rotate the rear filter 21 relative to the filter case 2 by turning the toggle portion 25. After this embodiment, the filter 21 is suitable for using a circular polarizing filter. When the user rotates the rear filter 21 after the circular polarizing filter, the first front filter 40 and the second front that have been adjusted and fixed will not be affected at all. Filter 41 (see the first front filter 40 and the second front filter 41 in FIG. 4).

Please refer to FIG. 8, which is another specific embodiment of a filter box with an improved structure of a filter holder according to the present invention. The main structure of the filter box 2 of this embodiment is substantially the same as that of the filter box 2 of the embodiment shown in FIG. 7, except that one of the rear filters 21 'has a rear filter thread portion 210, and the filter The fixing portion 20 has a filter box screw portion 20 ′. The rear filter 21 'is fixed to the filter fixing portion 20 by screwing the rear filter screw portion 210 and the filter case screw portion 20'. The rear filter 21 'is a commercially available filter, and it can be used with the filter case 2 without additional design and manufacture.

In another embodiment, the filter holder body 1 can be directly pivoted to the lens 50 of the camera 5 through the filter holder pivoting portion 13.

Please refer to FIG. 9D, which is a photo taken by applying a specific embodiment of an improved structure of a filter holder of the present invention. Please also compare the photos in FIG. 9C (the photos taken by the specific embodiment of the filter holder of the conventional technology in FIG. 9A). From the comparison between FIG. 9C and FIG. 9D, it can be clearly seen that the photo taken by the embodiment of the improved structure of the filter frame of the present invention does not have the reflected image of the camera lens as shown in FIG. 9C.

The above are the specific embodiments of the present invention and the technical means used. According to the disclosure or teaching of this article, many changes and modifications can be derived, which can still be regarded as the equivalent changes made by the concept of the present invention. The functions that have not exceeded the essential spirit covered by the description and drawings should be regarded as within the technical scope of the present invention, and should be considered together.

In summary, according to the content disclosed above, the present invention can indeed achieve the intended purpose of the invention, provide an improved structure of a filter holder, which is highly valued for industrial use, and file an invention patent application according to law.

Claims (7)

An improved structure of a filter holder includes: a filter holder body comprising: a card slot portion, wherein the card slot portion has an opening of the card slot portion; and a filter frame pivot portion provided on the filter frame. On the rear side of one of the bodies, the filter frame pivoting portion is for pivoting with a lens of a camera, and the filter frame system is arranged at a front end of the lens so that the lens is interposed between the camera and the filter. Between the frame bodies, the filter frame pivoting portion includes a pivoting portion groove and at least one fixing portion; a filter case, wherein the filter case has a filter fixing portion, and a rear filter system Fixed to the filter fixing portion, wherein the filter box can be inserted into the card slot portion from the opening of the card slot portion and fixed to the card slot portion; a front filter frame, the front filter frame is connected by a The pivoting member is pivotally connected to a front side of the filter holder body. The front filter holder includes a pair of right fixing portions and a left fixing portion, wherein the pair of right fixing portions and the left fixing portion each have at least one pair of right fixing grooves. And the left fixing groove, wherein each of the at least one pair of the right fixing groove and the left fixing groove is used for A front filter is fixedly clamped; and a connecting member, each side of the connecting member has a connecting member pivoting portion and a connecting member threaded portion, wherein the lens has a lens threaded portion, wherein the connecting member threaded portion is It can be screwed with the lens threaded part, the pivoted part groove of the filter frame pivoted part and the at least one fixing part can be pivoted with the connector pivoted part, wherein the connector pivoted part has a The connecting member groove, wherein one of the at least one fixing portion of the filter holder pivoting portion can be tightly combined with the connecting member groove, thereby enabling the filter holder pivoting portion to be pivotally connected to the connecting member. Department is closely integrated. An improved structure of a filter holder includes: a filter holder body comprising: a card slot portion, wherein the card slot portion has an opening of the card slot portion; a filter holder pivot portion is provided on the filter holder body On a rear side, the filter holder pivot is connected to a lens of a camera. The filter holder system is arranged at the front end of the lens so that the lens is between the camera and the filter. Between the frame bodies, the filter frame pivoting portion includes a pivoting portion groove and at least one fixing portion; and a filter case, wherein the filter case has a filter fixing portion, wherein a rear filter system Fixed to the filter fixing part, wherein the filter box can be inserted into the card slot part from the opening of the card slot part and fixed to the card slot part; and a connecting member, each side of the connecting member has a connection A pivot part and a screw part of the connector, wherein the lens has a screw part of the lens, wherein the pivot part of the filter frame can be pivoted with the pivot part of the connector, and the screw part of the connector can be connected with the lens The threaded portion is screwed, wherein the groove of the pivotal portion and the at least one fixing portion are connected with The pivoting portion of the connecting piece is pivotally connected, wherein the connecting piece pivoting portion has a connecting piece groove, and one of the at least one fixing portion of the filter frame pivoting portion can be tightly combined with the connecting piece groove. Therefore, the pivotal portion of the filter holder is tightly combined with the pivotal portion of the connecting member. The improved filter holder structure according to item 1 or item 2 of the patent application scope, wherein the filter fixing part is rotatable relative to the filter case, thereby enabling the rear filter to be relative to the filter case. Turn. The improved filter holder structure described in item 3 of the scope of patent application, wherein the filter case further includes a toggle portion, the toggle portion is linked with the filter fixing portion, and a user can dial by The toggle portion makes the rear filter rotate relative to the filter box. The improved filter holder structure according to item 1 or item 2 of the scope of the patent application, wherein the card slot portion further includes a first close portion, and the first close portion causes the filter case to extend from the card slot portion. When the opening is inserted into the card slot portion and is fixed to the card slot portion, the card slot portion opening is tightly closed, wherein the filter case further includes a second close portion, and the second close portion makes the filter When the cassette is inserted into the card slot portion from the opening of the card slot portion and is fixed to the card slot portion, the opening of the card slot portion is tightly fitted. The improved filter holder structure described in item 2 of the patent application scope, further comprising a front filter holder, the front filter holder is pivotally connected to a front side of the filter holder body by a pivot member, wherein The front filter frame includes a pair of right fixing portions and a left fixing portion, wherein the pair of right fixing portions and the left fixing portions respectively have at least a pair of right fixing grooves and a left fixing groove, wherein the at least a pair of right fixing grooves and a left fixing groove Each pair of fixing grooves is used for fixing and clamping a front filter. The improved filter holder structure according to item 1 or item 2 of the patent application scope, wherein the filter fixing portion has a filter box thread portion, and the rear filter has a rear filter thread portion, wherein the filter The box screw part can be screwed with the rear filter screw part, so that the rear filter is fixed to the filter fixing part.