JP2013020018A - Waterproof mechanism for filter frame in digital camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a compound lens part and a CCD image sensor from humidity and water droplet (moisture) by providing a waterproof mechanism for a filter frame, which is capable of improving a waterproof function in a camera lens barrel by attaching various filters to the front of the camera lens barrel.SOLUTION: When manufacturing a filter by assembling a part composed of a filter outer peripheral frame, filter lens, and a lens presser screw ring, a molding member formed from thermoplastic elastomer is fitted to an outer edge of the filter lens, the filter lens with the molding member formed from the thermoplastic elastomer is placed on a filter lens presser edge of the filter outer peripheral frame, and while this portion is heated, the molding member formed from the thermoplastic elastomer is plastically deformed with the lens presser screw ring and the filter lens is fastened between the filter lens presser edge and lens presser screw ring via the molding member formed form the thermoplastic elastomer. Thus, the waterproof mechanism for the filter frame, which has the configuration described above, is provided.

Description

  The present invention relates to a waterproof mechanism for a filter frame that can be applied to a digital single-lens reflex camera. In particular, the present invention relates to a lens protection filter, a light amount adjustment filter, a light effect filter that provides special effects, and a subject. The present invention relates to a waterproof mechanism for a filter frame in various digital camera filters, such as a soft focus filter that can express the image softly.

  Recently, digital single-lens reflex camera filters have great utility value, such as lens protection filters, light intensity adjustment filters, streak effect filters that provide special effects, and soft focus filters that can softly express subjects. Filters for cameras have been provided.

Thus, the filter frame for holding the various filters described above has a function that can conventionally fit various filters on the front surface of the lens barrel of a digital camera and a function that can hold various filters in the filter frame. It has been considered sufficient.

However, the lens of a digital single lens reflex camera employs a compound lens, and has a multiple lens structure that requires careful attention to moisture and moisture from the outside air. Even in a CCD image sensor or the like that is connected to a lens and converts an image into an electrical signal, attention should be paid to moisture and moisture.

The present invention provides a waterproof mechanism for a filter frame holding various filters, and protects the inside of the lens barrel from moisture and water droplets (moisture) from the outside by mounting the filter comprising the filter frame in front of the lens barrel. The present invention relates to a waterproof mechanism for a filter frame.

3 (A), (B), and (C) illustrate the structure of a conventional filter frame for a digital camera, FIG. 3 (A) shows an assembly diagram of the filter, and FIG. 3 (B) FIG. 3A is a partial cross-sectional view illustrating the assembled state of FIG. 3A, and FIG. 3C is an enlarged view of a main part illustrating the outer peripheral frame of the filter frame of FIG.

In FIGS. 3A, 3B and 3C for explaining a conventional filter frame, 50 is a filter frame, 51 is a filter outer peripheral frame formed by the filter frame 50, 52 is a filter lens, 53 is a lens holding spring, Reference numeral 54 denotes a lens fitting portion, and 55 denotes a lens pressing edge portion. A female screw 58 for screwing another attachment is screwed to the inner inner diameter portion 57 on the incident light side 56 of the filter outer peripheral frame 51. Further, on the camera lens side 59 of the filter outer peripheral frame 51, a male screw 60 for screwing the filter outer peripheral frame 51 on the front surface (not shown) of the camera lens barrel is screwed. A cylindrical portion 61 is formed.

As shown in FIG. 3A, the conventional filter frame 50 includes a filter outer peripheral frame 51, a filter lens 52, and a lens pressing spring 53, and a lens pressing edge 55 in the filter outer peripheral frame 51. The filter frame 52 is assembled and manufactured as shown in FIG. 3B by fitting the filter lens 52 inside and fixing the filter lens 52 with a pressing spring 53.

  Thus, the filter frame 50 assembled and manufactured as shown in FIG. 3B has the filter lens 52 in the filter outer peripheral frame 51 as shown in FIG. 3C in which the filter outer peripheral frame 51 is enlarged. It is sandwiched between a lens holding edge 55 and a lens holding spring 53 which are provided in advance, and is fixed inside the filter outer peripheral frame 51. Although it is a combination product of precision parts, it does not incorporate a waterproof mechanism at all. None of the conventional products have consciously adopted the waterproof function.

In the filter mounted on the front surface of the camera lens barrel (not shown), the waterproof mechanism of the filter lens 52 portion, the camera lens barrel portion and the filter frame mounting portion, that is, the filter on the front surface of the camera lens barrel. The waterproof mechanism of the male screw 60 portion for screwing the outer peripheral frame 51 is also important, but the conventional product has not shown any interest regarding the waterproof mechanism related to the portion.

  Therefore, the problem to be solved by the present invention is that the waterproof function in the camera lens barrel can be enhanced by attaching various filters used in recent digital single lens reflex cameras to the front surface of the camera lens barrel. A waterproof mechanism for the filter frame is provided to protect the compound lens portion of the camera lens and the CCD image sensor from moisture and water droplets (moisture).

The present invention assembles a filter outer peripheral frame, a filter lens, and a lens holding screw ring to produce a filter, and a molded member made of a thermoplastic elastomer is attached to the outer edge of the filter lens. A filter lens with a molded member made of elastomer is placed on the lens holding edge of the outer peripheral frame of the filter and the thermoplastic elastomer molded member is plastically deformed with a lens holding screw ring while heating the portion, and the thermoplastic The present invention provides a waterproof mechanism for a filter frame in a digital camera in which a filter lens is fixed between a lens pressing edge and a lens pressing screw ring via a molding member made of an elastomer.

In the present invention, the molded member made of a thermoplastic elastomer provided at the outer edge of the filter lens is a U-shaped molded member that can be mated with the outer edge of the filter lens. By using a plurality of protrusions with a semicircular cross section or convex shape on the outer periphery, the protrusions can be easily plastically deformed when pressed and heated from the outside. A waterproof mechanism for a filter frame in a digital camera is provided.

Further, on the outer side of the outer peripheral frame of the filter according to the present invention, a heating recess groove is formed on the outer edge portion of the filter lens to heat a molding member made of a thermoplastic elastomer and to plastically change the molding member. A molded member made of a thermoplastic elastomer that is placed on the lens pressing edge and pressed by the lens pressing screw ring by attaching a heater to the heating recess groove is configured to be arbitrarily heat-processable. A waterproof mechanism for a filter frame in a digital camera is provided.

  Further, in the present invention, the thermoplastic elastomer heating recess groove provided on the outer side of the filter outer peripheral frame is a color ring, product number, manufacturer name, or the like, after the filter frame has been manufactured. It has been proposed to use a ring engraved with a function identification code as an outer circumferential groove.

In the present invention, the waterproof mechanism of the male thread portion for screwing the filter outer peripheral frame to the front surface of the camera lens barrel includes screwing the filter frame to the front surface of the camera lens barrel, A circular mounting groove is formed on the edge of the outer periphery of the filter on which the filter contacts, and a thermoplastic elastomer molded member seal is fitted into the circular mounting groove to form a waterproof seal mechanism.

  Thus, the present invention adopts and provides a waterproof mechanism for a filter frame with good water tightness as a waterproof mechanism for various filter frames. It was possible to provide a waterproof mechanism for a filter frame in a digital camera capable of protecting a compound lens portion of a camera lens and a CCD image sensor from water droplets (moisture).

(A) It is an assembly drawing explaining this invention. (B) It is principal part sectional drawing explaining this invention. (A) It is a principal part enlarged view explaining the shape of the lens holding screw ring of this invention. (B) It is a principal part enlarged view explaining the shape of the shaping | molding member of this invention. (C) It is a principal part enlarged view explaining the structure of this invention. (A) It is an assembly drawing explaining a prior art example. (B) It is principal part sectional drawing explaining a prior art example. (C) It is a principal part enlarged view explaining a prior art example.

  The present invention relates to a waterproof mechanism for a filter frame that can be applied to a digital single-lens reflex camera. In particular, the present invention relates to a lens protection filter, a light amount adjustment filter, a light effect filter that provides special effects, and a subject. The present invention relates to a waterproof mechanism for various filter frames, such as a soft focus filter that can express softly.

The lens of a digital single lens reflex camera employs a compound lens, and has a multiple lens part that must be sufficiently careful with moisture and moisture from the outside air. Even in CCD image sensors that are connected to convert images into electrical signals, it is necessary to be careful about moisture and moisture, and the present invention provides a waterproof mechanism for the filter frame holding various filters. The present invention provides a filter frame waterproofing mechanism that protects the inside of the lens barrel from moisture and water droplets (moisture) from the outside by mounting a filter comprising the filter frame in front of the lens barrel.

Thus, in the present invention, a filter is manufactured by assembling components including a filter outer peripheral frame, a filter lens, and a lens holding screw ring, and a molded member made of a thermoplastic elastomer is attached to the outer edge of the filter lens. The filter lens with a molding member made of a thermoplastic elastomer is placed on the lens pressing edge of the filter outer peripheral frame, and the molding member made of the thermoplastic elastomer is plastically deformed by a lens pressing screw ring while heating the portion. The filter lens is preferably fixed and sealed between the lens pressing edge and the lens pressing screw ring through the molding member made of the thermoplastic elastomer.

In the present invention, the molded member made of a thermoplastic elastomer provided at the outer edge of the filter lens is a U-shaped molded member that can be mated with the outer edge of the filter lens. The outer periphery uses a semi-circular cross-section or a plurality of protrusions with a convex shape, and can be easily plastically deformed when the protrusions are pressurized and heated from the outside. It is preferable to do.

Further, on the outer side of the outer peripheral frame of the filter according to the present invention, a heating recess groove is formed on the outer edge portion of the filter lens to heat a molding member made of a thermoplastic elastomer and to plastically change the molding member. A molded member made of a thermoplastic elastomer that is placed on the lens holding edge and pressed by the lens holding screw ring can be arbitrarily heated and plastically deformed by installing a heater in the recessed groove for heating. It is preferable to do.

  Further, in the present invention, the thermoplastic elastomer heating recess groove provided on the outer side of the outer peripheral frame of the filter has a color ring, product number, or manufacturer in the heating recess groove after the filter frame waterproofing mechanism is manufactured. It is preferable to use it as an outer peripheral groove for attaching a ring engraved with a name or function identification code.

In the present invention, the waterproof mechanism of the male thread portion for screwing the filter outer peripheral frame to the front surface of the camera lens barrel includes screwing the filter frame to the front surface of the camera lens barrel, It is preferable that a circular mounting groove is formed on the edge of the outer periphery of the filter on which the filter contacts, and a thermoplastic elastomer molded member seal is fitted and fixed in the circular mounting groove to form a waterproof seal mechanism.

Thus, the thermoplastic elastomer used as the molded member is preferably a plastic resin-based thermoplastic elastomer, and in particular, the thermoplastic elastomer molded member seal fitted in the circular mounting groove is By using a plastic resin-based thermoplastic elastomer, a slippery waterproof seal surface can be constructed.

  FIG. 1 (A) is an assembly diagram for explaining Example 1 of the present invention, and FIG. 1 (B) is a cross-sectional view of an essential part for explaining Example 1 of the present invention. 2A is an enlarged view of a screw ring used in the present invention, FIG. 2B is an enlarged view showing the shape of a filter lens outer edge portion and a molding portion attached to the lens outer edge portion, and FIG. C) is an enlarged view showing the outer peripheral portion of the filter of the present invention.

    1 (A), 1 (B) and 2 (A), 2 (B), and 2 (C), 1 is a filter frame, 2 is a filter outer frame formed by the filter frame 1, 3 is a filter lens, and 4 is a filter. A molded member made of a thermoplastic elastomer attached to the outer edge portion of the lens 3 is a filter lens holding screw ring 5, and the filter lens holding ring 5 is provided on the inner inner diameter portion 7 on the incident light side 6 of the filter outer peripheral frame 2. It can be screwed into the female screw 8 for screwing another attached attachment.

The filter outer frame 2 is provided with a filter lens pressing edge 9 and a camera lens side 10 with a male screw 11 for screwing the filter outer frame 2 onto the camera lens. 12 is further provided with a thermoplastic elastomer heating recess groove 13 on the outside of the filter outer peripheral frame 2, and a camera lens barrel tip 14 of the male screw outer cylinder 12 (FIG. 2 (shown in FIG. 2C) is provided with a circular mounting groove 15 and a thermoplastic elastomer molded member seal 16 is fitted into the circular mounting groove 15 to provide a waterproof seal. It is said.

FIG. 2A shows the filter lens pressing ring 5 used in the present invention, and a ring male thread 17 is screwed on the outside of the filter pressing ring 5. The filter holding ring 5 having the male screw 17 for the ring sandwiches the filter lens 3 and the molded member 4 made of thermoplastic elastomer between the female screw 8 provided on the inner inner diameter portion 7, and the thermoplastic holding ring 17. The molded member 4 made of an elastomer can be pressed and held between the filter lens pressing edges 9.

FIG. 2 (B) shows the shape of a molded member 4 made of a thermoplastic elastomer used in the present invention. The molded member 4 has a U-shape that can be fitted to the outer edge of the filter lens 3. The molded member 4 is formed, and a plurality of projections 18a, 18b, and 18c having a semicircular cross section or a convex shape are formed on the outer peripheral portion of the molded member 4 as shown in FIG. 2A and 2B, the filter holding ring 5, the filter lens 3, and the molded member 4 made of a thermoplastic elastomer are incorporated into FIG. 2C to manufacture a waterproof mechanism for the filter frame.

Thus, according to the embodiment of the present invention, when the filter outer frame 2, the filter lens 3, and the lens pressing screw ring 5 are assembled to produce a filter, the outer edge of the filter lens 3 is made of a thermoplastic elastomer. The lens holding screw ring 5 is mounted while the filter lens 3 with the molding member 4 made of thermoplastic elastomer is mounted on the filter lens pressing edge 9 of the filter outer peripheral frame 2 and the portion is heated. Then, the molding member 4 made of the thermoplastic elastomer is plastically deformed, and the filter lens 3 is fixed between the filter lens pressing edge 9 and the lens pressing screw ring 5 through the molding member 4 made of the thermoplastic elastomer. The waterproof mechanism part of the filter frame 1 is manufactured.

A molded member 4 made of a thermoplastic elastomer provided on the outer edge of the filter lens 3 is formed into a U-shaped molded member 4 that can be mated with the outer edge of the filter lens 2. By using a plurality of projections 18a, 18b, 18c having a semicircular cross section or a convex shape on the outer periphery, the projections 18a, 18b, 18c are pressurized and heated from the outside. It can be easily plastically deformed.

Further, a heating recess groove 13 is provided on the outer side of the filter outer peripheral frame 2 to heat the molding member 4 made of a thermoplastic elastomer provided on the outer edge of the filter lens 3 and to plastically change the molding member 4. It is engraved, and is attached with a heater to the heating recess groove 13 so as to press the filter lens pressing screw ring 5 against the molding member 4 of the filter lens 2 placed on the filter lens pressing edge 9 while being thermoplastic. The molding member 4 made of an elastomer is heat-moldable.

  Further, in the embodiment of the present invention, the thermoplastic elastomer heating recess groove 13 provided on the outer side of the filter outer peripheral frame 2 is provided with a color ring in the heating recess groove 13 after the filter frame is completed. Further, it can be effectively used as an outer peripheral groove for attaching the ring member 19 engraved with a product number, manufacturer name, or function identification code.

In the filter outer frame 2, the waterproof mechanism of the male screw 11 portion for screwing the filter outer frame 2 to the front surface of the camera lens barrel includes screwing the filter frame 1 to the front surface of the camera lens barrel. A circular mounting groove 15 is formed on the filter outer peripheral frame edge 20 with which the camera lens barrel tip 14 abuts, and a thermoplastic elastomer molding member seal 16 is fitted into the circular mounting groove 15. By using the waterproof seal mechanism, the waterproof mechanism of the filter frame 1 could be completed.

Thus, the present invention is constructed by adopting a waterproof mechanism of a filter frame with good water tightness as a waterproof mechanism of various filter frames, and mounting the various filter frames on the front surface of the digital camera lens barrel makes it possible to remove moisture and water droplets. It was possible to provide a waterproof mechanism for a filter frame in a digital camera that can protect a compound lens portion of a camera lens and a CCD image sensor from (moisture).

DESCRIPTION OF SYMBOLS 1 Filter frame 2 Filter outer peripheral frame 3 Filter lens 4 Molding member which consists of thermoplastic elastomers 5 Filter lens pressing screw ring 6 Incident light side 7 Inner inner diameter part 8 Female thread part 9 Filter lens pressing edge 10 Camera lens side 12 Male thread outer cylinder Portion 13 Thermoplastic elastomer heating recess 14 Camera lens barrel tip 15 Circular mounting groove 16 Molding member seal 17 Female thread rings 18a, 18b, 18c Protrusion 19 Ring member 20 Filter outer peripheral frame edge

Claims (5)

When manufacturing a filter by assembling parts including a filter outer frame, a filter lens, and a lens holding screw ring, a molded member made of a thermoplastic elastomer is attached to the outer edge of the filter lens, and the molded member made of the thermoplastic elastomer. A molded lens made of the thermoplastic elastomer is formed by plastically deforming the molded member made of the thermoplastic elastomer with the lens holding screw ring while placing the filter lens on the filter lens holding edge of the filter outer peripheral frame and heating the portion. A waterproof mechanism for a filter frame in a digital camera, wherein a filter lens is fixed between a filter lens pressing edge and a lens pressing screw ring via a member.   The molded member made of thermoplastic elastomer provided on the outer edge of the filter lens is a U-shaped molded member that can be mated with the outer edge of the filter lens, and the outer periphery of the molded member has a cross section. By using a plurality of semi-circular or convex-shaped protrusions that are molded and processed, the protrusions can be easily plastically deformed when pressed and heated from the outside. The waterproof mechanism of the filter frame in the digital camera according to claim 1.   On the outer side of the outer peripheral frame of the filter, a heating recess groove is provided for heating a molded member made of a thermoplastic elastomer provided on the outer edge of the filter lens, and plastically varying the molded member, 2. A molded member made of a thermoplastic elastomer placed on a filter lens holding edge and pressurized by a filter lens holding screw ring by attaching a heater to the heating recess groove, and capable of being heated. A waterproof mechanism for a filter frame in the digital camera according to claim 2.   The thermoplastic elastomer heating recess groove provided on the outer side of the filter outer peripheral frame is engraved with a color ring, product number, manufacturer name, or function identification code in the heating recess groove after the filter frame has been manufactured. 4. A waterproof mechanism for a filter frame in a digital camera according to claim 1, wherein the waterproof mechanism is used as an outer peripheral groove for attaching the ring. In the outer peripheral frame of the filter, the waterproof mechanism of the male thread part for screwing the filter outer peripheral frame to the front surface of the camera lens barrel is screwed with the filter frame to the front surface of the camera lens barrel. A waterproof mounting mechanism is provided by forming a circular mounting groove on the edge of the outer peripheral frame of the abutting filter, and fitting a molded member seal made of a thermoplastic elastomer into the circular mounting groove. The waterproof mechanism for the filter frame according to any one of claims 1 to 4.

Images