JP5449476B2 - Filter attachment / detachment mechanism for digital cameras - Google Patents

Description

The present invention relates to a filter attachment / detachment mechanism developed for a digital camera. In particular, the present invention relates to an ultraviolet (UV) cut filter, dimming (ND) selected on the front surface of a lens barrel of a digital camera according to a photographing purpose. ) When shooting with a filter frame that holds various filter lenses, such as filters, soft effect filters, spot effect filters, and streak effect filters, the respective filter frames can be easily and easily replaced. A filter frame for a digital camera to which other filters can be attached is provided.

On the inner diameter side of the foremost part of the camera lens barrel, a female screw is threaded to mount the attachment of the photographic lens such as various filters and hoods. A male screw is screwed on the attachment mounting side, and a filter frame, a hood, and the like are attached and detached by screwing the screw portion.

Therefore, the attachment / detachment mechanism for screwing the filter frame with the screw portion has the following drawbacks. That is, the initial fitting operation for screwing the male screw of the filter frame into the female screw screwed at the forefront of the camera lens barrel is surprisingly troublesome, and has a unique intuition and operational familiarity. In addition, since the thread pitch of the thread portion is fine, it is necessary to rotate the filter frame to be mounted many times and mount it at a predetermined position.

Accordingly, if the first male screw and female screw are misfitted, the screw threaded on the photographing lens and the filter frame may be broken, and this part is a screw screwing operation. In order to solve this problem, for example, Japanese Patent Application Laid-Open No. 2004-109719 discloses that the screw portions are pressed against each other when screwing in and out at a predetermined position is mistaken. (Hereinafter referred to as Patent Document 1).

The invention of Patent Document 1 provides a filter frame attaching / detaching mechanism that can be easily and easily attached and detached with one touch, and includes an insertion portion formed integrally with a filter outer frame sandwiching a filter. The attachment portion has an outer diameter that can be inserted into the innermost internal thread portion of the camera lens barrel for photographing, and a spring fitting groove is formed on the outer peripheral portion of the insertion portion. A ring-shaped spring having a ring shape and having a notch in one place is fitted into a spring fitting groove formed on the outer periphery, and the ring-shaped spring is circumferentially inserted in the spring fitting groove via the notch. Using the spring action of the ring, when the insertion part of the filter is inserted into the foremost inner diameter side of the photographing lens barrel of the camera, a ring-type spring works to engage with the innermost front part. A filter is attached to the front of the lens barrel for shooting. Is, removal of the filter is configured to pull-out with force against the pressing force of the ring spring of the insertion portion.

The invention of Patent Document 1 uses a ring-type spring to insert the filter frame into the foremost internal diameter female screw portion of the camera lens barrel, and is a camera that can be easily and easily attached and detached with one touch. A lens attachment attachment / detachment mechanism is provided.

However, the invention of Patent Document 1 mounts a filter or other attachment using a filter screwed on the foremost inner diameter side of a camera lens barrel or a female thread portion for mounting other attachment. However, the mechanism for inserting the ring-type spring into the female screw portion has a drawback in that the thread of the female screw portion is worn over many years and the tip of the lens barrel is damaged.

In addition, the invention of Patent Document 1 and the conventional filter frame, as described above, use a female screw part screwed at the forefront part of the camera lens barrel for the camera and use a ring-type spring or male on the filter frame side. The mounting part on the filter frame side facing the foremost inner diameter side of the lens barrel has directionality, and only one side of the filter frame has a ring-shaped spring mounting part or male screw. The other one side has a configuration in which a female screw is screwed in order to attach another attachment.

Therefore, the invention of Patent Document 1 and the conventional type screw-type filter frame have front and back sides. When the conventional filter frame is attached to the lens barrel, the ring-type spring or male screw on the filter frame side is firmly attached. This is a filter attachment / detachment mechanism that is very inconvenient in an emergency shooting site where it is necessary to check the position and perform the mounting operation, and it is dark and does not want to miss a photo opportunity.

JP 2004-109719 A

The problem to be solved by the present invention is that an ultraviolet (UV) cut filter, a neutral density (ND) filter, a soft effect filter, a spot effect filter, a light strip selected at the forefront of a digital camera barrel in accordance with the photographing purpose. When shooting with various filter frames such as effect filters, the filter frame holding the filter lenses having the respective functions has a filter attaching / detaching mechanism that is mounted on the front of the camera lens barrel on both sides. In addition, an adapter frame having a filter mounting portion that fits into the filter attaching / detaching mechanism is mounted in the forefront of the lens barrel of the digital camera, and the adapter frame is darkened and escapes a photo opportunity. Filter frame with various filter lenses sandwiched in emergency shooting situations Simple and easily replaced, there is provided a filter detaching mechanism for a digital camera can be mounted.

The adapter frame according to the present invention simplifies the attachment mounting mechanism at the forefront of the digital camera barrel so that attachments such as various filter frames and hoods can be easily and easily attached and detached. It is intended to provide a filter attaching / detaching mechanism for a digital camera that protects the female thread portion for attaching the attachment at the forefront of the lens barrel and does not damage the forefront of the lens barrel.

Furthermore, the filter attaching / detaching mechanism of the digital camera according to the present invention has a countermeasure against the recent filter frame being manufactured using a polymer elastic body. In other words, since the filter frame can be arbitrarily selected with the polymer elastic body, the filter frame can be selected by using a relatively soft polymer elastic body, and the filter frame is placed in front of the lens of the digital camera. In this case, there are new functions and effects such as creating a function that acts as a cushioning material when the lens barrel of the camera is hit against glass or a wall during shooting. Expected.

Thus, the foremost part of the conventional camera lens barrel has a hard lens frame inner diameter part with a female screw for attaching an attachment such as a filter or a hood, and a filter that is screwed into this female screw part. The mounting portion of the frame had to constitute a fitting portion such as a male screw portion made of a metal such as aluminum having the same degree of hardness or a screwed portion by a ring type spring. In the present invention, the lens barrel A digital adapter that allows easy installation and fitting of the filter frame by interposing an adapter frame between the foremost part and the filter frame and adopting a unique mounting mechanism for polymer elastic bodies on the incident light side of the adapter frame. A filter attaching / detaching mechanism for a camera is provided.

In the present invention, the adapter frame having a male screw part that is screwed into a female screw provided on the inner diameter side of the lens barrel frontmost part of the digital camera has a filter frame mounting part on the incident light side thereof, The adapter frame is mounted in advance on the inner diameter side of the forefront of the lens barrel, and various filter frames can be mounted on the lens barrel side via the adapter frame, and the various filter frames may be on both sides of the adapter frame. The present invention provides a filter attaching / detaching mechanism for a digital camera in which filter attaching portions which can be attached and can be arbitrarily detached are formed on both sides of a filter frame.

In the present invention, the filter frame mounting portion provided on the incident light side of the adapter frame is a ring-shaped tapered portion formed on the outer diameter side of the adapter frame around the optical axis of the lens barrel of the digital camera, The ring-shaped taper portion has an outer diameter taper portion having a small diameter on the incident light side and a large diameter on the lens barrel side, and the inner diameter portion taper of the filter frame fitted to the outer diameter taper portion. The mold mounting portions are provided on the inner surface of the filter frame, provided on both sides of the filter frame sandwiching the filter lens having various functions with a large diameter at the tip side and a small diameter at the filter lens side. An adapter frame is mounted in front of the lens barrel in advance, and an inner diameter taper type provided on both sides of the filter frame on the outer diameter taper portion of the adapter frame. Either wearing part fitted there is provided a filter detaching mechanism for digital camera for mounting the filter frame.

In the present invention, the filter frame mounting portion provided on the incident light side of the adapter frame is a ring-shaped taper portion formed on the outer diameter side of the adapter frame with the optical axis of the lens barrel of the digital camera as the center. The ring-shaped taper portion is a tapered portion for an outer diameter portion having a small diameter on the incident light side and a large diameter on the lens barrel side, and the large diameter portion of the tapered portion for the outer diameter portion has a U-shaped engagement. A groove is engraved, and a semi-circular protrusion is provided at the tip of the inner diameter taper mounting portion of the filter frame that fits into the outer diameter taper portion. An adapter frame is mounted in front of the lens barrel in advance, and a semi-circle provided in the tapered mounting portion of the filter frame in a U-shaped engagement groove formed in the outer diameter taper portion of the adapter frame The protruding part of the shape fits In is also a filter removal mechanism for a digital camera fitted either inside diameter portion tapered mounting portion provided on both sides of the filter frame and mounting the filter frame.

Further, as an embodiment of the present invention, the filter frame mounting portion provided on the incident light side of the adapter frame is a fitting groove formed on the inner diameter side of the adapter frame around the optical axis of the lens barrel. The fitting engagement claw of the filter frame that fits into the fitting groove is located at the tip of the elastic plate provided protruding outward from the outer diameter portion of the filter frame, and the other end of the elastic plate is attached to the filter frame. By pressing two or more knobs that are fixed and provided at the intermediate portion of the elastic plate member from the outer diameter portion of the filter, the fitting locking claw of the tip portion is inserted in the optical axis direction via the elastic plate member. The filter side mounting part is provided on both sides of a filter frame having various functions, and an adapter frame is mounted in front of the lens barrel in advance. , Formed on the inner diameter side of the adapter frame Provided with a filter attaching / detaching mechanism for a digital camera, wherein either one of the filter side mounting portions including fitting locking claws provided on both sides of the filter frame is fitted into the fitted groove and the filter frame is mounted. It is.

In the present invention, the adapter frame is manufactured using a metal such as aluminum, and the filter frame mounted on the adapter frame and the filter side mounting portions mounted on both sides of the filter frame use a polymer elastic body. This is a filter attaching / detaching mechanism for a digital camera manufactured in the same manner.

Further, in the present invention, a lens protecting filter lens is sandwiched in the adapter frame, and a filter frame attaching portion for attaching various filter lenses to the incident light side of the lens protecting filter lens is provided. This is a filter attaching / detaching mechanism for digital cameras.

Thus, the present invention provides an ultraviolet (UV) cut filter, a neutral density (ND) filter, a soft effect filter, a spot effect filter, and a streak effect filter selected according to the purpose of photographing at the front of the lens barrel of the digital camera. When shooting with various filter frames such as the above, the filter frame sandwiching the filter lenses having the respective functions has a filter attaching / detaching mechanism that attaches to the frontmost part of the camera lens barrel on both sides thereof. In addition, an adapter frame having a filter mounting portion that fits into the filter attaching / detaching mechanism is mounted in front of the lens barrel front of the digital camera. Easy and easy exchange of filter frames with various filter lenses Filter attaching and detaching mechanism for a digital camera can be mounted and can be provided.

The adapter frame according to the present invention simplifies the attachment mounting mechanism at the forefront of the digital camera barrel so that attachments such as various filter frames and hoods can be easily and easily attached and detached. It is possible to provide a filter attaching / detaching mechanism for a digital camera that protects the female thread portion for attaching the attachment at the forefront of the tube and does not damage the forefront of the lens barrel.

The filter attaching / detaching mechanism of the digital camera according to the present invention has a countermeasure against the recent filter frame being manufactured using a polymer elastic body. In other words, the filter frame can be made of any polymer elastic body, and the hardness of the filter frame can be arbitrarily selected. Therefore, the filter frame can be manufactured using a relatively soft polymer elastic body and attached to the forefront of the digital camera lens. In this case, new functions and effects are expected, such as creating a function that acts as a cushioning material when the lens barrel of the camera hits glass or a wall during shooting. In the forefront of a conventional camera lens barrel, a female frame for mounting an attachment such as a filter or a hood is screwed on the inner diameter of the hard lens frame, and the filter frame is screwed into the female screw. It was necessary for the mounting part to constitute a male threaded part made of metal such as aluminum having the same degree of hardness or a screwed part or a fitting part by a ring type spring, In the invention, the adapter frame is interposed between the lens barrel frontmost part and the filter frame, and the unique attachment mechanism for the polymer elastic body is employed on the incident light side of the adapter frame, so that the filter frame can be mounted and fitted. A filter attachment / detachment mechanism for digital cameras that can be easily operated can be provided.

(A) The member arrangement | sequence figure explaining Example 1 of this invention. (B) Main part sectional drawing explaining Example 1 of this invention. (A) The member arrangement | sequence figure explaining Example 2 of this invention. (B) Main part sectional drawing explaining Example 2 of this invention. (A) Main part expansion explanatory drawing which shows the other example in Example 2. FIG. (B) The mechanism position explanatory side view in Example 2. FIG.

The present invention provides various kinds of materials such as an ultraviolet (UV) cut filter, a neutral density (ND) filter, a soft effect filter, a spot effect filter, a light effect filter, etc. When shooting with the filter frame mounted, the filter frame sandwiching the filter lenses having the respective functions has a filter attaching / detaching mechanism mounted on the frontmost part of the camera lens barrel on both sides thereof, An adapter frame having a filter mounting portion that fits in the filter attaching / detaching mechanism is mounted in front of the digital camera barrel in advance, and it is dark when the adapter frame does not want to miss a photo opportunity etc. The filter frame holding various filter lenses can be easily and easily replaced and installed. It is intended to provide a filter detaching mechanism for a digital camera that can.

Further, the adapter frame in the present invention makes the attachment mounting mechanism at the foremost part of the digital camera barrel versatile so that attachments such as various filter frames and hoods can be easily and easily attached and detached. It is intended to provide a filter attaching / detaching mechanism for a digital camera that protects the female thread portion for attaching the attachment at the forefront of the lens barrel and does not damage the forefront of the lens barrel.

Furthermore, the filter attaching / detaching mechanism of the digital camera according to the present invention has a countermeasure against the recent filter frame being manufactured using a polymer elastic body. In other words, the filter frame can be made of any polymer elastic body. The hardness of the filter frame can be selected arbitrarily. Therefore, by using a relatively soft polymer elastic body, the filter frame can be manufactured and attached to the forefront of the digital camera lens. In this case, new functions and effects such as causing a function of acting as a buffer when a lens barrel of a camera is hit against glass or a wall during photographing are expected.

Thus, the foremost part of the conventional camera lens barrel has a hard lens frame inner diameter part with a female screw for attaching an attachment such as a filter or a hood, and a filter that is screwed into this female screw part. The mounting part of the frame had to be configured with a male threaded part made of metal such as aluminum having the same degree of hardness, or a threaded part or a fitting part with a ring spring. A digital camera that makes it easy to mount and fit the filter frame by interposing an adapter frame between the filter frame and the filter frame and adopting a unique mounting mechanism for polymer elastic bodies on the incident light side of the adapter frame A filter attaching / detaching mechanism is provided.

In the present invention, the adapter frame having a male screw part that is screwed into a female screw provided on the inner diameter side of the lens barrel frontmost part of the digital camera has a filter frame mounting part on the incident light side thereof, The adapter frame is mounted in advance on the inner diameter side of the frontmost lens barrel of the digital camera, and various filter frames can be mounted on the lens barrel side through the adapter frame, and the various filter frames are attached to the adapter frame. It is preferable that the filter mounting portions that can be mounted regardless of the front and back sides and which can be detached are formed on both sides of the filter frame.

In the present invention, the filter frame mounting portion provided on the incident light side of the adapter frame is a ring-shaped tapered portion formed on the outer diameter side of the adapter frame around the optical axis of the lens barrel of the digital camera, The ring-shaped taper portion has an outer diameter taper portion having a small diameter on the incident light side and a large diameter on the lens barrel side, and the inner diameter portion taper of the filter frame fitted to the outer diameter taper portion. The mold mounting portions are provided on the inner surface of the filter frame, provided on both sides of the filter frame sandwiching the filter lens having various functions with a large diameter at the tip side and a small diameter at the filter lens side. An adapter frame is mounted in front of the lens barrel in advance, and an inner diameter taper type provided on both sides of the filter frame on the outer diameter taper portion of the adapter frame. Is preferably either a wearing part fitted a structure for mounting the filter frame.

In the present invention, the filter frame mounting portion provided on the incident light side of the adapter frame is a ring-shaped taper portion formed on the outer diameter side of the adapter frame with the optical axis of the lens barrel of the digital camera as the center. The ring-shaped taper portion is a tapered portion for an outer diameter portion having a small diameter on the incident light side and a large diameter on the lens barrel side, and the large diameter portion of the tapered portion for the outer diameter portion has a U-shaped engagement. A groove is engraved, and a semi-circular protrusion is provided at the tip of the inner diameter taper mounting portion of the filter frame that fits into the outer diameter taper portion. An adapter frame is mounted in front of the lens barrel in advance, and a semi-circle provided in the tapered mounting portion of the filter frame in a U-shaped engagement groove formed in the outer diameter taper portion of the adapter frame The protruding part of the shape fits In is preferably configured to fit either the inner diameter tapered mounting portion provided on both sides of the filter frame and mounting the filter frame.

Further, as an embodiment of the present invention, the filter frame mounting portion provided on the incident light side of the adapter frame is a fitting groove formed on the inner diameter side of the adapter frame around the optical axis of the lens barrel. The fitting engagement claw of the filter frame that fits into the fitting groove is located at the tip of the elastic plate provided protruding outward from the outer diameter portion of the filter frame, and the other end of the elastic plate is attached to the filter frame. By pressing two or more knobs that are fixed and provided at the intermediate portion of the elastic plate member from the outer diameter portion of the filter, the fitting locking claw of the tip portion is inserted in the optical axis direction via the elastic plate member. The filter side mounting part is provided on both sides of a filter frame having various functions, and an adapter frame is mounted in front of the lens barrel in advance. , Formed on the inner diameter side of the adapter frame It is preferably fitted either filter side mounting portion consisting of mating locking claws provided on both sides of the filter frame to a structure for mounting the filter frame into the fitting groove.

In the present invention, the adapter frame is manufactured using a metal such as aluminum, and the filter frame mounted on the adapter frame and the filter side mounting portions mounted on both sides of the filter frame use a polymer elastic body. It is preferable to be manufactured.

Further, in the present invention, a lens protecting filter lens is sandwiched in the adapter frame, and a filter frame attaching portion for attaching various filter lenses to the incident light side of the lens protecting filter lens is provided. Preferably it is.

Thus, the present invention provides an ultraviolet (UV) cut filter, a neutral density (ND) filter, a soft effect filter, a spot effect filter, and a streak effect filter selected according to the purpose of photographing at the front of the lens barrel of the digital camera. The filter frame sandwiching the filter lenses having the respective functions has a filter attaching / detaching mechanism that attaches to the forefront of the camera lens barrel on both sides of the filter lens. In addition, an adapter frame having a filter mounting portion that fits into the filter attaching / detaching mechanism is mounted in front of the lens barrel front of the digital camera. Easy and easy exchange of filter frames with various filter lenses Filter attaching and detaching mechanism for a digital camera can be mounted Te can be provided.

The adapter frame according to the present invention is a digital camera mirror that makes attachments such as various filter frames and hoods simple and easy to attach and detach by generalizing the attachment mounting mechanism at the forefront of the digital camera barrel. It is possible to provide a filter attaching / detaching mechanism for a digital camera that protects the female thread portion for attaching the attachment at the forefront of the tube and does not damage the forefront of the lens barrel.

The filter attaching / detaching mechanism of the digital camera according to the present invention has a countermeasure against the recent filter frame being manufactured using a polymer elastic body. In other words, the filter frame can be made of any polymer elastic body. The hardness of the filter frame can be selected arbitrarily. Therefore, by using a relatively soft polymer elastic body, the filter frame can be manufactured and attached to the forefront of the digital camera lens. In this case, new functions and effects are expected, such as creating a function that acts as a cushioning material when the lens barrel of the camera hits glass or a wall during shooting. In the forefront of a conventional camera lens barrel, a female screw for attaching an attachment such as a filter or a hood is screwed on the inner diameter of the hard lens frame. The mounting part had to be configured with a male threaded part made of metal such as aluminum having the same degree of hardness, or a threaded part or a fitting part with a ring spring. Ming uses an adapter frame between the front of the lens barrel and the filter frame, and adopts a unique mounting mechanism for polymer elastic bodies on the incident light side of the adapter frame, so that the filter frame can be mounted and fitted. A filter attachment / detachment mechanism for digital cameras that can be easily operated can be provided.

FIG. 1A is a member arrangement diagram for explaining the first embodiment of the present invention, and FIG. 1B is a main part sectional view for explaining the mounting state in the first embodiment. In FIGS. 1A and 1B, 1 is a lens barrel of a digital camera, 2 is an adapter frame that forms a member of the present invention, and 3 is a filter frame that similarly forms a member of the present invention. The lens barrel 1, the adapter frame 2, and the filter frame 3 are arranged on the optical axis C as shown in FIG. In FIGS. 1A and 1B, 4 indicates the lens barrel side, and 5 indicates the incident light side.

Thus, a female screw 8 for mounting an attachment such as a filter or a hood is screwed on the inner diameter portion 7 of the lens barrel frontmost portion 6 of the lens barrel 1 of the digital camera. In the first embodiment, the adapter frame 2 has a ring shape. On the lens barrel side 4 of the adapter frame 2, a female screw 8 provided on the inner diameter portion 7 of the lens barrel 1 of the digital camera. A male screw 9 is screwed.

The filter frame mounting portion 10 to the filter frame 3 provided on the incident light side 5 of the adapter frame 2 is formed on the outer diameter portion 11 of the adapter frame 2 around the optical axis C of the lens barrel 1. The ring-shaped taper portion 12 is formed with an outer diameter taper portion 13 in which the incident light side 5 has a small diameter and the lens barrel side 4 has a large diameter. A U-shaped engagement groove 14 is formed on the large-diameter portion side of the diameter portion taper portion 13.

Next, the shape of the filter frame 3 mounted on the adapter frame 2 of Example 1 is various such as an ultraviolet (UV) cut filter, a neutral density (ND) filter, a soft effect filter, a spot effect filter, and a light effect filter. The filter lens 15 is sandwiched between the lens barrel side 4 and the incident light side 5 of the filter frame 3 and is provided with inner diameter tapered mounting portions 16a and 16b. The parts 16a and 16b are provided in the inner diameter part of the filter frame 3, and the tip side has a large diameter and the filter lens 15 side has a small diameter. The inner diameter taper mounting portions 16a and 16b of the filter frame 3 are respectively provided on both surfaces (back and front) of the filter frame 3 sandwiching the various filter lenses 15, and the inner diameter taper mounting portions 16a, Each of the tip portions of 16b is provided with a semicircular projection 17 and the adapter frame 2 is mounted in advance on the forefront of the lens barrel 1, and the ring-shaped taper portion 12 of the adapter frame 2 The filter frame 3 is attached to the lens barrel frontmost portion 6 of the lens barrel 1 by fitting one of the inner diameter tapered mounting portions 16 a and 16 b provided on both surfaces of the filter frame 2.

Thus, the adapter frame 2 is provided with a taper portion 13 for the outer diameter portion, and the filter frame 3 is provided with the inner diameter portion taper type mounting portions 16a and 16b. 1B is performed at the taper portions of each other as shown in FIG. 1B. A U-shaped engagement groove 14 is formed in the large diameter portion of the outer diameter taper portion 13 of the adapter frame 2. Further, the semicircular protrusions 17 are provided at the tip portions of the inner diameter tapered mounting portions 16a and 16b provided on both surfaces of the filter frame 3, respectively. The adapter frame 2 is attached to the adapter frame 2 with a so-called click feeling at the time of attachment, so that the operation is reliable and the attachment of the part does not occur unexpectedly.

In the adapter frame 2 of the first embodiment, reference numeral 18 denotes a pinching portion having an outer diameter that protrudes for performing an attaching / detaching operation. The pinching portion 18 has a knurling process for preventing slippage on the outer peripheral surface. The adapter frame 2 is manufactured using a metal such as aluminum, and the filter frame 3 to be mounted on the adapter frame 2 and the filter side mounting portions mounted on both sides of the filter frame 3 use a polymer elastic body. It is manufactured. The adapter frame 2 may be configured such that a lens protecting filter lens is sandwiched between them, and in this case, the adapter frame 2 can also serve as a lens protecting filter frame.

Thus, according to the present invention, the adapter frame 2 having the male screw 9 screwed into the female screw 8 provided in the inner diameter portion 7 of the lens barrel frontmost portion 6 of the lens barrel 1 of the digital camera is A filter frame mounting portion 10 of the filter frame 3 is provided on the light side 5, and the adapter frame 2 is mounted in advance on the inner diameter portion 7 of the lens barrel frontmost portion 6, and the filter with various functions is passed through the adapter frame 2. The frame 3 can be mounted on the lens barrel side 4, and the filter frame 3 with various functions can be mounted on the adapter frame 2 regardless of the front and back, and can be detached arbitrarily. A filter attaching / detaching mechanism for a digital camera in which the filter frame 3 is formed on both surfaces (front and back) of the filter frame 3 is provided.

In the first embodiment of the present invention, the filter frame mounting portion 10 provided on the incident light side 5 of the adapter frame 2 is on the outer diameter side of the adapter frame 2 with the optical axis C of the lens barrel 1 of the digital camera as the center. The formed ring-shaped taper portion 12 has an outer diameter taper portion 13 in which the incident light side 5 has a small diameter and the lens barrel side 4 has a large diameter. The tapered inner mounting portions 16a and 16b of the filter frame 3 fitted to the outer diameter taper portion 13 are provided in the inner diameter portion 7 of the filter frame 3 and have a large diameter at the tip side and a small diameter at the filter lens 15 side. The filter frame 3 is sandwiched between the filter frames 15 having various functions. The adapter frame 2 is attached to the lens barrel frontmost portion 6 of the digital camera in advance. A digital camera for mounting the filter frame 3 by fitting one of the inner diameter tapered mounting portions 16a and 16b provided on both surfaces (back and front) of the filter frame 3 to the outer diameter taper portion 13 of the putter frame 2 It is a filter attaching / detaching mechanism for use.

Furthermore, as another specific example of the mechanism of the first embodiment, the filter frame mounting portion 10 provided on the incident light side 5 of the adapter frame 2 is an adapter frame centered on the optical axis C of the lens barrel 1 of the digital camera. The ring-shaped taper portion 12 is formed on the outer diameter side of the outer diameter portion, and the ring-shaped taper portion 12 has a small diameter on the incident light side 5 and a large diameter on the lens barrel side 4. 13, a U-shaped engagement groove 14 is formed in the large-diameter portion of the outer diameter taper portion 13, and the inner diameter taper of the filter frame 3 that fits into the outer diameter taper portion 13. A semi-circular protrusion 17 is provided at the tip of the mold mounting portions 16a and 16b, and the adapter frame 2 is mounted in advance on the lens barrel frontmost portion 6 of the digital camera. Formed on the outer diameter taper portion 13 Inner diameter portions provided on both surfaces of the filter frame 2 by fitting the semicircular protrusions 17 provided on the inner diameter tapered portion 16a, 16b of the filter frame 3 into the U-shaped engagement groove 14 The present invention provides a filter attaching / detaching mechanism for a digital camera in which either one of the taper type attaching portions 16a and 16b is fitted and the filter frame 3 is attached.

Thus, in the first embodiment, the ultraviolet (UV) cut filter, the neutral density (ND) filter, the soft effect filter, the spot effect filter, and the light stripe effect selected according to the photographing purpose at the front of the lens barrel of the digital camera. When shooting with various filter frames such as filters, the filter frame sandwiching the filter lens having the respective functions has a filter attaching / detaching mechanism that attaches to the frontmost part of the camera lens barrel on both sides. In addition, an adapter frame having a filter mounting portion that fits into the filter attaching / detaching mechanism is mounted in front of the lens barrel front of the digital camera. Simple and easy filter frame that holds various filter lenses at the time of shooting It is possible to provide a filter detaching mechanism for a digital camera can be mounted in conversion.

In addition, the adapter frame in the first embodiment makes the attachment of the attachment part at the foremost part of the digital camera barrel versatile so that attachments such as various filter frames and hoods can be easily and easily attached and detached. It is possible to provide a filter attaching / detaching mechanism for a digital camera that protects the female thread portion for attachment attachment at the forefront of the lens barrel and does not damage the forefront of the lens barrel.

The filter attaching / detaching mechanism of the digital camera according to the first embodiment has a countermeasure against the recent filter frame being manufactured using a polymer elastic body. In other words, the filter frame can be made of any polymer elastic body. The hardness of the filter frame can be selected arbitrarily. Therefore, by using a relatively soft polymer elastic body, the filter frame can be manufactured and attached to the forefront of the digital camera lens. In this case, new functions and effects are expected, such as creating a function that acts as a cushioning material when the lens barrel of the camera hits glass or a wall during shooting. In the forefront of a conventional camera lens barrel, a female screw for attaching an attachment such as a filter or a hood is screwed on the inner diameter of the hard lens frame. The mounting part had to be configured with a male threaded part made of metal such as aluminum having the same degree of hardness, or a threaded part or a fitting part with a ring spring. Ming uses an adapter frame between the front of the lens barrel and the filter frame, and adopts a unique mounting mechanism for polymer elastic bodies on the incident light side of the adapter frame, so that the filter frame can be mounted and fitted. A filter attachment / detachment mechanism for digital cameras that can be easily operated can be provided.

2A is a member arrangement diagram for explaining the second embodiment of the present invention, FIG. 2B is a cross-sectional view of a main part for explaining a mounting state in the second embodiment, and FIG. The principal part enlarged view explaining other Examples of Example 2 is shown, FIG.3 (B) is the mechanism position explanatory side view.

2 (A) and 2 (B), 1 is a lens barrel of a digital camera, 2 is an adapter frame that forms the member of the present invention, 3 is a filter frame that similarly forms the present invention, The lens barrel 1, the adapter frame 2, and the filter frame 3 are arranged on the optical axis C as shown in FIG. In FIG. 2, 4 indicates the lens barrel side, and 5 indicates the incident light side.

Thus, a female screw 8 for mounting an attachment such as a filter or a hood is screwed on the inner diameter portion 7 of the lens barrel frontmost portion 6 of the lens barrel 1 of the digital camera. In the second embodiment, the adapter frame 2 has a ring shape. On the lens barrel side 4 of the adapter frame 2, a female screw 8 provided on the inner diameter portion 7 of the lens barrel 1 of the digital camera. A male screw 9 that can be screwed to is screwed.

The filter frame mounting portion 10 to the filter frame 3 provided on the incident light side 5 of the adapter frame 2 is a ring formed on the adapter inner diameter portion 19 of the adapter frame 2 with the optical axis C of the lens barrel 1 as the center. The ring-shaped fitting groove 20 is formed with a convex locking protrusion 21 on the outside.

Next, the shape of the filter frame 3 is a configuration in which various filter lenses 15 such as an ultraviolet (UV) cut filter, a neutral density (ND) filter, a soft effect filter, a spot effect filter, and a streak effect filter can be sandwiched. And a fitting latching claw that fits into a fitting groove 20 provided in the adapter frame 2 on the lens barrel side 4 of the filter frame 3 and the outer edge portion 22 on the incident light side 5 of the filter frame 3. 23a, 23b, 24a, 24b are provided.

Thus, the fitting and engaging claws 23a, 23b, 24a, and 24b are respectively located at the distal end portions of the elastic plate member 25 provided so as to protrude from the outer edge portion 22 of the filter frame 3 to the elastic body. The other end of the plate member 25 is fixed inside the filter frame 3. Further, by pressing the knobs 27 a, 27 b, 28 a, 28 b provided on the outer diameter portion 26 of the elastic plate member 25 from the outer diameter portion 26 of the filter frame, the tip portion of the tip end portion is interposed via each elastic plate member 25. The fitting locking claws 23a, 23b, 24a, 24b constitute filter side mounting portions 29, 30 configured to move in the optical axis C direction.

The filter side mounting portions 29 and 30 are provided on both sides (back and front) of the filter frame 3 having various functions, and the adapter frame 2 is mounted in advance on the lens barrel frontmost portion 6 of the lens barrel 1. The fitting locking claws 23 a, 23 b, 24 a, and 24 b provided on both surfaces of the filter frame 3 are formed on the protrusion locking protrusions 21 of the fitting groove 20 formed in the inner diameter portion 19 of the adapter frame 2. The filter frame 3 is mounted by arbitrarily fitting either one of the filter side mounting portions 29 and 30 (shown in FIG. 2B), and when the filter frame 3 is mounted, the tip portion Since the engagement locking claws 23a, 23b, 24a, and 24b are configured through the elastic plate member 25, there is a so-called “click” feeling at the time of mounting, and the mounting of the filter frame 3 can be confirmed. Is a thing

Thus, FIG. 3A is an enlarged view of a main part for explaining another example of the second embodiment, and FIG. 3B is a left side view for explaining the mechanism position. 3A and 3B, 3 is a filter frame, 4 is a lens barrel side, 5 is an incident light side, 15 is a filter lens, 22 is an outer edge portion, 23a, 23b, 24a, and 24b are fitting members. A pawl, 25 is an elastic plate member, 26 is an outer diameter portion of the filter frame, 27a, 27b, 28a and 28b are knobs, and 29 and 30 are filter mounting portions.

3 (A) and 3 (B) show fitting locking claws 23a, 23b, 24a, 24b and knobs 27a arranged on both surfaces (back and front) of the filter frame 3 with respect to the embodiment of the embodiment 2 of FIG. 27b, 28a, and 28b are shifted by 90 degrees from each other to improve the operability of the knobs 27a, 27b, 28a, and 28b.

In Example 2, the adapter frame 2 is manufactured using a metal such as aluminum, and the filter frame 3 to be mounted on the adapter frame 2 and the filter mounting portions mounted on both sides (back and front) of the filter frame 3. 29 and 30 are manufactured using a polymer elastic body. Further, the adapter frame 2 can be configured so that a lens protecting filter lens can be sandwiched, and the adapter frame 2 can also serve as a lens protecting filter frame.

Thus, in the second embodiment, an ultraviolet (UV) cut filter, a neutral density (ND) filter, a soft effect filter, a spot effect filter, and a streak effect are selected at the front of the lens barrel of the digital camera according to the photographing purpose. When shooting with various filter frames such as filters, the filter frame sandwiching the filter lens having the respective functions has a filter attaching / detaching mechanism that attaches to the frontmost part of the camera lens barrel on both sides. In addition, an adapter frame having a filter mounting portion that fits into the filter attaching / detaching mechanism is mounted in front of the lens barrel front of the digital camera. Simple and easy filter frame that holds various filter lenses at the time of shooting It is possible to provide a filter detaching mechanism for a digital camera can be mounted in conversion.

In addition, the adapter frame according to the second embodiment is designed to make attachments such as various filter frames and hoods easy and easy to attach and detach by generalizing the attachment mounting mechanism at the forefront of the digital camera barrel. It is possible to provide a filter attaching / detaching mechanism for a digital camera that protects the female thread portion for attachment attachment at the forefront of the lens barrel and does not damage the forefront of the lens barrel.

The filter attaching / detaching mechanism of the digital camera according to the second embodiment has a countermeasure against the recent filter frame being manufactured using a polymer elastic body. In other words, the filter frame can be made of any polymer elastic body. The hardness of the filter frame can be selected arbitrarily. Therefore, by using a relatively soft polymer elastic body, the filter frame can be manufactured and attached to the forefront of the digital camera lens. In this case, new functions and effects such as causing a function of acting as a cushioning material when the lens barrel of the camera is hit against glass or a wall during photographing can be expected.

In addition, the foremost part of the conventional camera lens barrel has a female lens inner diameter for mounting an attachment such as a filter or a hood threaded on the inner diameter of the hard lens frame. The mounting portion had to be configured with a male screw portion made of metal such as aluminum having the same degree of hardness, or a screwed portion or a fitting portion with a ring spring, but in Example 2, the lens barrel frontmost portion By installing an adapter frame between the filter frame and the incident light side of the adapter frame, it is possible to easily and easily mount and fit the filter frame. A filter attachment / detachment mechanism for digital cameras can be provided.

DESCRIPTION OF SYMBOLS 1 Lens barrel 2 Adapter frame 3 Filter frame 4 Lens barrel side 5 Incident light side 6 Lens barrel frontmost part 7 Inner diameter portion 8 Female screw 9 Male screw 10 Filter frame mounting portion 11 Outside diameter portion 12 of adapter frame Ring-shaped taper Part 13 taper part 14 for outer diameter part engagement groove 15 filter lens 16a, 16b inner diameter part taper type mounting part 17 projection part 18 clamping part 19 adapter inner diameter part 20 fitting groove 21 convex part locking projection part 22 outer edge part 23a, 23b Fitting locking claw 24a, 24b Fitting locking claw 25 Elastic body plate material 26 Outer diameter part 27a, 27b of knob of filter frame 28a, 28b Knob 29 Filter mounting part 30 Filter mounting part C Optical axis

Claims (3)

The adapter frame having a male threaded portion that engages with a female screw provided on the inner diameter side of the frontmost lens barrel of the digital camera has a filter frame mounting portion on the incident light side, and the adapter frame is Mounted on the inner diameter side of the lens barrel frontmost part of the digital camera, various filter frames can be mounted on the lens barrel side via the adapter frame, and the filter frame mounting portion provided on the incident light side of the adapter frame is A ring-shaped taper formed on the outer diameter side of the adapter frame around the optical axis of the lens barrel of the digital camera. The ring-shaped taper has a small diameter on the incident light side and a large diameter on the lens barrel side. The inner diameter part of the filter frame that fits into the outer diameter taper part is provided on the inner diameter part of the filter frame, and the tip end side has a large diameter and a diameter. The front lens side is provided on both sides of the filter frame having a small diameter and sandwiching a filter lens having various functions. A filter attaching / detaching mechanism for a digital camera, wherein the filter frame is mounted by fitting one of the inner diameter tapered mounting portions provided on both sides of the filter frame to the outer diameter tapered portion of the frame. The filter frame mounting portion provided on the incident light side of the adapter frame is a ring-shaped taper portion formed on the outer diameter side of the adapter frame around the optical axis of the lens barrel of the digital camera, and the ring-shaped taper portion Is a tapered portion for the outer diameter portion having a small diameter on the incident light side and a large diameter on the lens barrel side, and a U-shaped engagement groove is engraved on the large diameter portion of the tapered portion for the outer diameter portion, A semi-circular protrusion is provided at the tip of the inner diameter tapered mounting portion of the filter frame that fits into the outer diameter tapered portion, and is previously provided in the forefront of the lens barrel of the digital camera. The adapter frame is mounted, and the semi-circular protrusions provided in the taper type mounting part of the filter frame are fitted into the U-shaped engaging groove formed in the outer diameter taper part of the adapter frame. On both sides of the filter frame Filter removal mechanism for digital camera according to claim 1, either kicked the bore tapered mounting portion fitted, characterized in that mounting the filter frame. The filter frame mounting portion provided on the incident light side of the adapter frame is a fitting groove formed on the inner diameter side of the adapter frame around the optical axis of the lens barrel. The engaging claw is located at the tip of the elastic plate provided protruding from the outer periphery of the filter frame toward the outer edge, and the other end of the elastic plate is fixed inside the filter frame. A filter side mounting portion configured to move the fitting engagement claw of the tip portion in the optical axis direction through an elastic plate member by pressing two knobs provided on the outer peripheral portion from the filter outer diameter side. The filter side mounting portions are provided on both sides of the filter frame having various functions, respectively, and an adapter frame is mounted in front of the lens barrel of the digital camera in advance. Mating groove formed on 2. The filter attachment / detachment for a digital camera according to claim 1, wherein the filter frame is mounted by fitting one of the filter side mounting portions including fitting locking claws provided on both surfaces of the filter frame. mechanism.

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