JP2007065221A - Lens cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens cap which has a simple mechanism, which does not require strong pressing force, and which is constituted so as not to be detached from a lens barrel, when only its one side is pressed. <P>SOLUTION: The lens cap comprises a lens cap main body with which the front of the lens barrel or a lens hood is covered; and a pair of pressing members, provided with an engaging part engaged with the inner peripheral surface of the lens barrel or the lens hood, held in the lens cap body and connected through an elastic energizing member. In the lens cap, the elastic energizing member is provided with an engaging means extended, in a direction of crossing the pressing direction, by being pressed in the center direction of the lens cap body by the pair of pressing members. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lens cap for protecting the front surface of a lens in cameras such as a still camera, a digital camera, and a video camera, and more particularly to a structure for mounting a lens cap on a lens barrel.

  In general, a lens barrel for protecting a lens front surface and preventing unwanted light from entering a lens barrel in a still camera, a digital camera, a video camera, or the like is generally performed.

  Such a lens cap is a type that is simply put on the front surface of the lens barrel or, as shown in FIG. 5, a main body portion 104 formed in a substantially disc shape facing the lens is protruded from the main body portion. Knob portions 105 and 106 having pressing claws (not shown) that are pressed in directions away from the center and engage with the inner peripheral surface of the lens barrel front surface are provided, and the knob portions are directed toward the center direction. There is a type in which the pressing claw is engaged with the front inner peripheral surface 103 of the lens barrel 101 containing the lens 102 of the camera 100 by reducing the diameter by pressing.

  Of these, the type that simply covers the front of the lens barrel cannot be used in a so-called collapsible camera in which the lens is stored in the camera body during non-shooting, and when the camera is carried in a bag or the like, Accidents such as the lens cap coming off due to contact with other objects and damage to the lens are likely to occur.

  On the other hand, the type having a pressing claw that is reduced in diameter by pressing and engages the inner peripheral surface of the lens barrel front surface can be used for the above-described retractable lens. Uses a pair of U-shaped leaf springs to reduce the diameter of the presser pawls, and stress due to pressing concentrates on the U-shaped curved portion of the leaf springs, and cracks are likely to occur. In order to prevent this, a lens cap is shown in which predetermined portions of the leaf springs are connected to each other.

  Also, in Patent Document 2, presser claws are provided at two locations at different distances from the center so that they can be attached to lenses of different diameters. A lens cap with a spring is shown.

  Further, in Patent Document 3, the pair of slider portions are pressed at two locations at different distances from the center so that the lens barrel tip and a lens hood having a diameter different from the lens barrel tip can be attached. A lens cap provided with a claw and a substantially U-shaped spring for urging the slider in a direction away from each other, and an engaging portion for holding the slider and the spring are shown on the cap body side.

JP 2002-365696 A JP 2003-84332 A JP 2004-101807 A

  However, the one disclosed in Patent Document 1 has a complicated shape of the leaf spring portion and has a small range in which the substantially U-shaped leaf spring can be compressed (toward the center direction). Nail diameter cannot be reduced.

  In addition, in Patent Documents 2 and 3, since the pair of knobs protruding from the cap body are only urged away from each other by a spring provided near the center, there is a backlash in the knob portion. If the knob on one side is pushed toward the center of the lens cap, the lens cap is removed as it is. Therefore, as in the case of a lens cap that covers the front of the lens barrel, when the camera is stowed and carried in a bag or the like, the knob is pressed by contact with other objects, and the lens cap comes off and damages the lens. Accidents will occur.

  Therefore, in the present invention, a lens cap that does not require a strong pressing force with a simple mechanism, does not cause backlash in the knob (pressing member) portion, and does not come off the lens barrel when pressed only on one side. Providing is a challenge.

In order to solve the above problems, the lens cap of the present invention is:
A lens cap body that covers the front surface of the lens barrel or lens hood, and a claw portion that engages with the inner surface of the lens barrel or lens hood is provided and held by the lens cap body, and is connected via an elastic biasing member. In the lens cap composed of a pair of pressed members,
The elastic urging member is formed to bulge in a direction crossing the pressing direction and away from the center of the lens cap by pressing the pair of pressing members toward the central direction of the lens cap body, and the elastic urging member; The lens cap body is provided with engaging means extending in the bulging direction.

  In this way, the elastic biasing member is connected to the elastic biasing member by providing the engagement means extending in the direction away from the center of the lens cap by crossing the pressing direction by pressing in the central direction of the lens cap body. The pressed member does not rattle due to the presence of the engaging means, and when the pair of pressing members are pressed together toward the center of the lens cap, the elastic biasing member moves in a direction intersecting the pressing direction, and the claw portion Can be easily engaged with the lens barrel or the inner peripheral surface of the lens hood. However, due to the presence of the engaging means, when one of the pressing members is pushed in the center direction of the lens cap, the pressing force pushes the engaging means against the one, and the elastic biasing member intersects the pressing direction by friction force. To prevent the camera from moving (spreading), so that when the camera is stored in a bag or the like, the other member presses one of the pressing members, causing the lens cap to come off and scratching the lens. Can be prevented.

  The engaging means is provided at a position where the pressing force of the pair of pressing members in the elastic urging member is balanced, so that the moving distance of the elastic urging member is maximized. When pressed, the force that prevents the elastic urging member from moving (spreading) in the direction crossing the pressing direction by the frictional force is the largest and more effective.

  The lens cap main body side engaging means has a groove provided symmetrically across the center in a direction away from the lens cap main body center, and the elastic biasing member side engaging means is formed on the groove. The lens cap body side engaging means is a protrusion standing on the lens cap body, and the elastic biasing member side engaging means swells while sandwiching the protrusion. The elastic biasing member side engaging means is a protrusion protruding in a direction intersecting the pressing direction by the pressing member, and the lens cap main body side engaging means is erected on the lens cap main body. Thus, a preferred embodiment of the present invention is a rib that guides with the elastic biasing member side protrusion interposed therebetween.

  As described above, the lens cap according to the present invention is not detached from the lens barrel by pressing only one side with a simple mechanism, and it is not necessary to use a particularly strong force for mounting. Since there is no backlash, it is suitable as a lens cap for a camera.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.

  FIG. 1 is a perspective view of a lens cap according to an embodiment of the present invention as seen from the back surface of Example 1, FIG. 2A is a plan view seen from the back surface, and FIG. A plan view, (C) is a plan view of a pair of pressing members and engaging means connected via an elastic biasing member, and (D) is indicated by EE in FIG. 2 (A) of this engaging means. It is sectional drawing of a position.

With reference to FIG. 1 or FIG. 2A, the lens cap 1 includes a lens cap body 2 that covers the front surface of the lens barrel or the lens hood, and a claw portion that engages the inner peripheral surface of the lens barrel or the lens hood. The lens barrel mounting member 3 includes 32 ₁ and 32 ₂ and elastic biasing members 34 ₁ and 34 ₂ .

Then, as shown in FIG. 2 (C), the barrel mounting member 3 is engaged with the pair of pressing portions ₃₁ 1, 31 _2, on the pushing unit ₃₁ 1, 31 lens hood inner circumferential surface provided at _two The claw portions 32 ₁ , 32 ₂ , and the lens cap body 2 are held by the pressing portion holding portions 22 ₁ , 22 ₂ , 22 ₃ , 22 ₄ provided with a space that can hold the lens barrel mounting member 3. The holding portions 33 ₁ and 33 ₂ are provided, and the both holding portions 33 ₁ and 33 ₂ are connected via the elastic biasing members 34 ₁ and 34 ₂ .

On the other hand, as shown in FIG. 2B, when the claw portions 32 ₁ and 32 ₂ are engaged with the lens barrel or the inner peripheral surface of the lens hood, the lens cap body 2 has the claw portions 32 ₁ and 32 _2. The holding portions provided with the frames 21 ₁ and 21 ₂ for protecting the front surface of the lens accommodated in the lens barrel in cooperation with the lens 21 and the space for holding the lens barrel mounting member 3 as described above. Portions 22 ₁ , 22 ₂ , 22 ₃ , and 22 ₄ are provided.

The lens cap body 2 and the mirror elastically biased provided on cylindrical mounting member 3 members 34 _1, 34 _2, when pressing the both pressing portions 31 _1, 31 _2, position (both of the pressing direction are balanced The groove 23 ₁ , which is the lens cap body 2 side engaging means, extends in a direction intersecting the pressing direction as shown in the sectional view of FIG. 23 ₂ is provided, and projections 35 ₁ and 35 ₂ to be engaged with the grooves are provided on the elastic biasing members 34 ₁ and 34 ₂ side.

Therefore, the protrusions 35 ₁ and 35 ₂ provided on the elastic biasing members 34 ₁ and 34 ₂ of the lens barrel mounting member 3 shown in FIG. 2C are shown in the lens cap body 2 as shown in FIG. The holding portions 33 ₁ and 33 ₂ in the lens barrel mounting member 3 are engaged with the pressing portion holding portions 22 ₁ and 22 ₂ in the lens cap body 2 while being engaged so as to enter the grooves 23 ₁ and 23 ₂ provided as described above. By fitting in 22 ₃ and 22 ₄ , the lens cap 1 as shown in FIG. 1 is completed.

The grooves 23 ₁ and 23 ₂ as the lens cap body 2 side engaging means are shown as grooves 23 ₁ and 23 ₂ in the figure, but both grooves are extended to the central position and combined to form a single groove. Also good. Further, to form a stepped portion so that upward increases drawings at least A portion of the groove 23 _1, to form a stepped portion such that the downward direction increases drawings at least part B of the groove 23 _2, part A the barrel attachment member 3 relative to the lens cap body 2 by the protrusion 35 ₁ abuts the step portion of restricted from moving upward in the drawing, the projections 35 ₂ to the step portion of the B portion abuts Thus, the movement of the lens barrel mounting member 3 in the downward direction of the drawing may be restricted.

The elastic biasing member 34 _1, 34 ₂ in the barrel mounting member 3, the position where the projection 35 1 serving this resilient biasing member side engagement _means, 35 ₂ are provided in a direction away from the center of the lens cap 1 Preferably, it is formed in a bulging shape, and as shown in the drawing, it is formed in a substantially U shape with the position where the projections 35 ₁ and 35 _{2 as the} elastic biasing member side engaging means are provided as the bottom. , when pressing the pressing portion 31 _1, 31 _2, it is possible to stress is dispersed without partially concentrating, to prevent the cracking and falling.

By thus configuring the lens cap 1, when pressing the pressing portion 31 _1, 31 ₂ in the barrel mounting member 3 in the direction of the center of the lens cap 1, the elastic biasing member 34 _1, 34 ₂ is perpendicular to the pressing direction in a direction (or a direction intersecting the pressing direction), bulges away from the center of the lens cap 1 tries to spread, the projections 35 _1, 35 ₂ provided on the elastic biasing member 34 _1, 34 _2, lens cap grooves 23 1 provided on the main body _2, 23 barrel mounting member 3 to slide through the ₂ is reduced in diameter, the claw portions 32 _1, engaging the 32 ₂ to the lens barrel or a lens hood inner peripheral surface It becomes possible to make it.

On the other hand, by carrying housing the camera bag or the like, by pressing one of the pressing portion ₃₁ 1, 31 ₂ others are in the lens cap 1, the pressing force projections ₃₅ 1, 35 ₂ a groove 23 ₁ , 23 only with become pressed against the wall of the direction which faces the pressing direction of the _2, because blocking by friction elastic biasing member 34 _1, 34 ₂ is moved in a direction perpendicular to the pressing direction (cross) (spreading) of , the claw portions 32 _1, 32 there is no engagement is disengaged to the _second lens barrel or a lens hood inner peripheral surface, an accident such as a lens cap 1 would scratch the lens off can be prevented. Moreover, since the play of the pressing member with respect to the lens cap body does not occur, it is suitable as a lens cap for a camera.

  3A is a plan view of the lens cap according to the embodiment of the present invention as viewed from the back surface of Example 2, FIG. 3B is a plan view of the lens cap body, and FIG. 3C is an elastic biasing member. The top view of a pair of press member and engagement means which were connected through this, (D) is sectional drawing of the position shown by FF in FIG. 3 (A) in this engagement means.

In the lens cap 1 shown in FIG. 1 or FIG. 2, the case where the grooves 23 ₁ and 23 ₂ are provided on the lens cap body 2 side and the protrusions 35 ₁ and 35 ₂ are provided on the lens barrel mounting member 3 side is shown. In the second embodiment shown in FIG. 3, the engaging means on the lens cap body 5 side are the protrusions 53 ₁ and 53 ₂ erected on the lens cap body 5, and the engaging means on the lens barrel mounting member 6 side is the protrusion 53. _1, 53 ₂ sandwiching a pressing portion ₆₁ 1, 61 ₂ bulging portion ₆₅ is bulged in a direction to move the pressing applied to the 1, 65 _2.

Referring to FIG. 3A, the lens cap 4 of the second embodiment includes a lens cap body 5 that covers the front surface of the lens barrel or the lens hood, and a claw portion that engages with the inner peripheral surface of the lens barrel or the lens hood. The lens barrel mounting member 6 includes 62 ₁ and 62 ₂ and elastic biasing members 64 ₁ and 64 ₂ .

As shown in FIG. 3C, the lens barrel mounting member 6 is provided on the pair of pressing portions 61 ₁ and 61 ₂ and the pressing portions 61 ₁ and 61 ₂ and is engaged with the inner peripheral surface of the lens hood. The claw portions 62 ₁ , 62 ₂ , and the lens cap body 5 are held by the pressing portion holding portions 52 ₁ , 52 ₂ , 52 ₃ , 52 ₄ provided with a space that can hold the lens barrel mounting member 6. The holding portions 63 ₁ and 63 ₂ are provided, and the both holding portions 63 ₁ and 63 ₂ are connected via the elastic biasing members 64 ₁ and 64 ₂ .

On the other hand, as shown in FIG. 3B, when the claw portions 62 ₁ and 62 ₂ are engaged with the lens barrel or the inner peripheral surface of the lens hood, the lens cap body 5 has the claw portions 62 ₁ and 62 _2. The holding portions of the frames 51 ₁ , 51 ₂ that protect the front surface of the lens accommodated in the lens barrel in cooperation with the lens, and the space for holding the lens barrel mounting member 6 as described above. Portions 52 ₁ , 52 ₂ , 52 ₃ , and 52 ₄ are provided.

The lens cap body 5 and the lens barrel resilient biasing member 64 1 provided on the mounting member _6, 64 _2, when pressing the both pressing portions 61 _1, 61 _2, the position where the pressing force is balanced, As shown in the cross-sectional view of FIG. 3D, protrusions 53 ₁ and 53 _{2 serving} as lens cap body 5 side engaging means are provided, and the lens barrel mounting member 6 has elastic biasing members 34 ₁ and 34 _2. extends in a direction crossing the side engaging means serving pressing direction, the protrusions 53 _1, 53 pressing portion 61 1 across the _2, 61 ₂ bulging was pressed bulge in the direction of movement by applied to the unit 65 _1, 65 ₂ are provided.

Therefore, the lens cap body 5 side engaging means serving projections ₅₃ 1, 53 ₂ shown in FIG. 3 (B), serving as an elastic urging member ₃₄ 1, 34 ₂ side engagement means shown in FIG. 3 (C) Rise sandwiched by output unit ₆₅ 1, 65 _2, the holding unit ₆₃ 1, 63 ₂ in the barrel attachment member 6, the pressing portion holding portions ₅₂ 1 of the lens cap body _5, 52 _2, 52 3, 52 ₄ or a fitted into it A lens cap 4 as shown in FIG. 3A is completed.

Incidentally, the bulging portion ₆₅ 1, 65 ₂ is required to be pressed portion ₆₁ 1, 61 ₂ of the pressing time and shaped to sandwich the protrusions ₅₃ 1, 53 ₂ in any of the time of non-pressing. Further, in the present embodiment, the bulging portion ₆₅ 1, 65 ₂ has been described also sandwich the protrusions ₅₃ 1, 53 ₂ at any time of pressing and during the non-pressing of the pressing portion ₆₁ 1, 61 _2, bulged As the shapes of the portions 65 ₁ and 65 _2, the lens barrel mounting member 6 moves downward in the drawing with respect to the lens cap body 5 by the contact between the A portion of the bulging portion 65 ₁ and the protrusion 53 _1. regulations and, B portion and the protrusion 53 ₂ of the bulge portion 65 ₂ is barrel attachment member 6 may be restricted from moving upward in the drawing by abutment.

The elastic biasing member 64 _1, 64 ₂ in the barrel attachment member 6 is bulged in a direction away from the center of the lens cap 4, by forming a substantially U-shape, presses the pressing portion 61 _1, 61 ₂ As in the first embodiment, the stress can be dispersed without being partially concentrated and cracks can be prevented.

By thus configuring the lens cap 4, when pressing the pressing portion 61 _1, 61 ₂ in the barrel attachment member 6 to the center of the lens cap 4, the elastic biasing member 64 _1, 64 ₂ is perpendicular to the pressing direction bulges in a direction away from the center of the lens cap 4 (direction crossing or in the pressing direction) direction trying to spread, the bulge portion 65 _1, 65 ₂ provided on the elastic biasing member 64 _1, 64 ₂ Then, the lens cap body 2 slides with the projections 53 ₁ and 53 ₂ interposed therebetween, and the lens barrel mounting member 6 is reduced in diameter so that the claw portions 62 ₁ and 62 ₂ are connected to the inner periphery of the lens barrel or lens hood. It is possible to engage the surface.

On the other hand, by carrying housing the camera bag or the like, even if others pressing one of the pressing portion 61 _1, 61 ₂ in the lens cap 4, the pressing force is bulged portion 65 _1, 65 ₂ projections 53 _1, 53 ₂ to act only in the abutting direction, because that prevents the first elastic urging member _64, 64 ₂ moves in the direction perpendicular to the pressing direction (cross) (spread) to the frictional force, the claw portion 62 _1, 62 there is no engagement is disengaged to the _second lens barrel or a lens hood inner peripheral surface, an accident such as a lens cap 4 is thereby scratch the lens off can be prevented. Moreover, since the play of the pressing member with respect to the lens cap body does not occur, it is suitable as a lens cap for a camera.

  4A is a plan view, FIG. 4B is a plan view of the lens cap main body, and FIG. 4C is an elastic biasing member, as viewed from the back surface of Example 3 in the lens cap according to the embodiment of the present invention. It is a top view of a pair of press member and engagement means which were connected through this.

In the lens cap 1 shown in FIG. 1 or FIG. 2, the case where the grooves 23 ₁ and 23 ₂ are provided on the lens cap body 2 side and the projections 35 ₁ and 35 ₂ are provided on the lens barrel mounting member 3 side is shown in FIG. In the lens cap 4 shown, the projections 53 ₁ and 53 ₂ are provided on the lens cap body 5 side, and the bulging portions 65 ₁ and 65 ₂ are provided on the lens barrel mounting member 6 side. In Example 3, the engaging means on the lens cap body 8 side are the ribs 83 ₁ and 83 ₂ erected on the lens cap body 8, and the engaging means on the lens barrel mounting member 9 side is the protrusions 95 ₁ and 95 ₂ . The ribs 83 ₁ and 83 ₂ are provided on both sides so as to sandwich the protrusions 95 ₁ and 95 ₂ .

Referring to FIG. 4A, the lens cap 7 of the third embodiment includes a lens cap body 8 that covers the front surface of the lens barrel or the lens hood, and a claw portion that engages with the inner peripheral surface of the lens barrel or the lens hood. The lens barrel mounting member 9 includes 92 ₁ and 92 ₂ and elastic urging members 94 ₁ and 94 ₂ .

Then, as shown in FIG. 4 (C), barrel attachment member 9, engage a pair of pressing portions ₉₁ 1, 91 _2, to the pressing portion ₉₁ 1, 91 lens hood inner circumferential surface provided at _two claw portions ₉₂ 1, 92 _2, provided with a space, such as to hold the barrel mounting member 9 to the lens cap body 8, held by the pressing part holding unit _{82 1,} 82 _2, 82 3, 82 ₄ holding unit ₉₃ 1, 93 ₂ are provided that, both holding portions ₉₃ 1, 93 ₂ are connected via the elastic biasing member ₉₄ 1, 94 _2.

On the other hand, as shown in FIG. 4 (B), 8 to the lens cap body, when the claw portions ₉₂ 1, 92 ₂ is engaged with the lens barrel or a lens hood inner peripheral surface, the claw portions ₉₂ 1, 92 _The frame 81 ₁ , 81 ₂ that protects the front surface of the lens accommodated in the lens barrel in cooperation with the lens ₂ , and the pressing portion provided with a space inside to hold the lens barrel mounting member 9 as described above holding unit _{82 1,} 82 _2, 82 3, 82 ₄ are provided.

The lens cap body 8 and the lens barrel resilient biasing member 94 1 provided on the mounting member _9, 94 _2, when pressing the both pressing portions 91 _1, 91 _2, the position where the pressing force is balanced, Ribs 83 ₁ and 83 _{2 serving as} lens cap body 5 side engaging means are provided, and the lens barrel mounting member 9 is protruded in a direction intersecting with the pressing direction serving as the elastic biasing members 94 ₁ and 94 ₂ side engaging means. Protrusions 95 ₁ and 95 ₂ are provided.

Therefore, the ribs 83 ₁ and 83 ₂ as the engagement means on the lens cap body 8 side shown in FIG. 4 (B) and the protrusions as the engagement means 94 ₁ and 94 ₂ side as shown in FIG. 4 (C). 95 ₁ sandwich the 95 _2, the holding unit ₉₃ 1, 93 ₂ in the barrel attachment member 9, by fitting the pressing portion holding portion _{82 1,} 82 _2, 82 3, 82 ₄ of the lens cap body 8, FIG. A lens cap 7 as shown in FIG.

The elastic biasing member 94 _1, 94 ₂ in the barrel attachment member 9 is bulged in a direction away from the center of the lens cap 7, by forming into a substantially U-shape, presses the pressing portion 91 _1, 91 ₂ As in the first and second embodiments, the stress can be dispersed without being partially concentrated and cracks and the like can be prevented.

Incidentally, the projections ₉₅ 1, 95 ₂ is required to be pressed portion ₉₁ 1, 91 rib ₈₃ 1 in any of the time ₂ of the pressing time and non-pressed, 83 ₂ fitted into such a shape. Further, in the present embodiment, the protrusions ₉₅ 1, 95 ₂ has been described also fitting the ribs ₈₃ 1, 83 ₂ in any of the ribs ₈₃ 1, 83 and during the non-pressing _second push, the rib 83 ₁ a leaving only (drawing above) and rib 83 ₂ B (drawing down), the barrel mounting member 9 with respect to the lens cap body 8 by a portion and the rib 83 ₁ of the protrusion 95 ₁ abuts the drawings restricted to move upward, the barrel attachment member 9 by B portion and the rib 83 _{and second} projections 95 ₂ abuts may be restricted from moving downward of the drawing.

By thus configuring the lens cap 7, when pressing the pressing portion 91 _1, 91 ₂ in the barrel mounting member 9 to the center of the lens cap 7, the elastic biasing member 94 _1, 94 ₂ is perpendicular to the pressing direction The projections 95 ₁ , 95 ₂ provided on the elastic biasing members 94 ₁ , 94 ₂ tend to swell and expand in a direction away from the center of the lens cap 7 in the direction (or the direction intersecting the pressing direction). barrel attachment member 9 to slide between the ribs 83 _1, 83 ₂ provided in the cap body 2 is reduced in diameter, to engage the claw portions 92 _1, 92 ₂ to the lens barrel or a lens hood inner peripheral surface It becomes possible.

On the other hand, by carrying housing the camera bag or the like, even if others pressing one of the pressing portion ₉₁ 1, 91 ₂ in the lens cap 7, the pressing force projections ₉₅ 1, 95 ₂ ribs 83 ₁ , only act to abut the 83 _2, because blocking the elastic biasing member 94 _1, 94 ₂ by the frictional force perpendicular to the pressing direction (intersecting) to move in a direction (expanding) of the claw portions 92 ₁ , without being disengaged engagement to 92 ₂ of the lens barrel or a lens hood inner peripheral surface, an accident such as a lens cap 7 would scratch the lens off can be prevented. Moreover, since the play of the pressing member with respect to the lens cap body does not occur, it is suitable as a lens cap for a camera.

Thus, according to the present invention, the elastic urging members 34 ₁ , 34 ₂ , 64 ₁ , 64 ₂ , 94 ₁ , 94 ₂ intersect the pressing direction by pressing the lens caps 1, 4, 7 toward the center. By providing the engaging means extending in the direction of the pressing, the pressing portions 31 ₁ , 31 ₂ , 61 ₁ connected to the elastic biasing members 34 ₁ , 34 ₂ , 64 ₁ , 64 ₂ , 94 ₁ , 94 ₂ are provided. , _{61 2,} 91 1, 91 ₂ has no rattle by the presence of the engagement means, the pair of pressing portions _{31 1,} 31 _{2, 61} 1, 61 _2, 91 1, 91 lens cap 1 ₂ together 4 and 7, the elastic biasing members 34 ₁ , 34 ₂ , 64 ₁ , 64 ₂ , 94 ₁ , 94 ₂ move in the direction intersecting the pressing direction, and the claw portions 32 ₁ , 32 are moved. _{2, 62 1,} 62 _2, 92 1, 92 ₂ It can be engaged to the lens barrel or a lens hood inner peripheral surface easily. However, the presence of the engagement means, and pressing the pressing portion _{31 1,} 31 _{2, 61} 1, 61 _2, 91 1, 91 ₂ while only the lens cap center direction, the pressing force of the engaging means Since the elastic urging members 34 ₁ , 34 ₂ , 64 ₁ , 64 ₂ , 94 ₁ , 94 ₂ are prevented from moving (spreading) in the direction intersecting the pressing direction simply by pressing against _one side, the camera Is stored in a bag or the like so that the other member can press one of the pressing portions 34 ₁ , 34 ₂ , 64 ₁ , 64 ₂ , 94 ₁ , 94 ₂ , and the lens caps 1, 4, 7 can be removed. Accidents such as scratching can be prevented.

  According to the present invention, it is possible to provide a lens cap that does not easily come off even if it is housed in a bag or the like and does not damage the lens surface without knowing it.

It is the perspective view which looked at Example 1 in the lens cap of embodiment which becomes this invention from the back surface. In the lens cap of Example 1, (A) is a plan view seen from the back side, (B) is a plan view of the lens cap body, and (C) is a pair of pressing members connected via an elastic biasing member. FIG. 2D is a plan view of the engagement means, and FIG. 2D is a cross-sectional view of the position of the engagement means indicated by EE in FIG. In the lens cap of Example 2, (A) is a plan view seen from the back surface, (B) is a plan view of the lens cap body, and (C) is a pair of pressing members connected via an elastic biasing member. FIG. 3D is a plan view of the engaging means, and FIG. 3D is a sectional view of the engaging means at a position indicated by FF in FIG. In the lens cap of Example 3, (A) is a plan view seen from the back surface, (B) is a plan view of the lens cap body, and (C) is a pair of pressing members connected via an elastic biasing member. It is a top view of an engaging means. It is a perspective view for demonstrating the lens cap of the type which has a nail | claw engaged with the lens-barrel inner peripheral surface in a camera.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lens cap 2 Lens cap main body 21 ₁ , 21 ₂ Frame 22 ₁ , 22 ₂ , 22 ₃ , 22 ₄ Pressing part holding part 23 ₁ , 23 ₂ Groove 3 Lens barrel attachment member 31 ₁ , 31 ₂ Pressing part 32 ₁ , 32 ₂ claw portions 33 ₁ , 33 ₂ holding portions 34 ₁ , 34 ₂ elastic biasing members 35 ₁ , 35 ₂ protrusions

Claims (5)

A lens cap body that covers the front surface of the lens barrel or lens hood, and a claw portion that engages with the inner surface of the lens barrel or lens hood is provided and held by the lens cap body, and is connected via an elastic biasing member. In the lens cap composed of a pair of pressed members,
The elastic urging member is formed to bulge in a direction crossing the pressing direction and away from the center of the lens cap by pressing the pair of pressing members toward the central direction of the lens cap body, and the elastic urging member; A lens cap characterized in that an engaging means extending in a bulging direction is provided on the lens cap body.   2. The lens cap according to claim 1, wherein the engagement means is provided at a position where both pressing forces of the pair of pressing members are balanced in the elastic biasing member.   The lens cap main body side engaging means has a groove provided symmetrically across the center in a direction away from the lens cap main body center, and the elastic biasing member side engaging means engages with the groove. The lens cap according to claim 1, wherein the lens cap is a protrusion provided to perform.   3. The lens cap main body side engaging means is a protrusion standing on the lens cap main body, and the elastic biasing member side engaging means swells while sandwiching the protrusion. The described lens cap.   The elastic urging member side engaging means is a protrusion protruding in a direction intersecting the pressing direction by the pressing member, and the lens cap main body side engaging means is erected on the lens cap main body and is provided with the elastic urging force. The lens cap according to claim 1, wherein the lens cap is a rib that guides the member side projection.

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