WO1981003553A1

WO1981003553A1 - Lens hood for camera

Info

Publication number: WO1981003553A1
Application number: PCT/JP1980/000116
Authority: WO
Inventors: K Sakuma
Original assignee: Yugen Kaisha Sakuma Seisakusho; K Sakuma
Priority date: 1980-05-29
Filing date: 1980-05-29
Publication date: 1981-12-10

Abstract

A lens hood (1) for a camera, which hood comprises an annular mounting washer (3) having substantially the same inner and outer diameters as those of the front end (14) of a lens barrel, a hood body (2) formed of an elastic member and mounted on the outside of the washer (3), a generally C-shaped mounting spring (4) in pressured contact with the inside of the washer (3), and push-buttons (42a, 42b) for urging the spring (4) to vary the diameter of the spring (4). When the push-buttons are depressed, the spring (4) is attached to the front end of the lens barrel to thus retain the lens barrel by the elastic force of the spring (4) Thus the lens hood can be readily attached and detached The spring (4) absorbs any impact applied to the hood.

Description

明

Title of invention Lens hood for camera

Technical field

The present invention relates to a lens hood for a camera], and more specifically, a lens hood for a camera which can be attached and detached by using a one-touch structure having an elastic member. It is about the world.

Background technology

In order to prevent the strong sunlight or sunlight from obliquely forward or side from directly entering the lens surface, a hood made of a rigid material such as metal is attached to the front end of the lens barrel or the front end of the lens barrel. Used by attaching to the attached filter. When these hoods are not in use, they can be turned upside down to cover the lens barrel so that they can be stored in the force lens.

However, when a hood made of such a rigid member is operated by the camera, the impact received when the hood is eaten by the camera is limited to the lens barrel of the camera. In the case of a replacement lens, add it to the mount part.]? Also, there are few things that can be attached and detached by hand.

Disclosure of the invention

The present invention eliminates the above-mentioned drawbacks, and is characterized by an annular mounting washer having an inner and outer diameter that is substantially the same as the inner and outer diameters of the front end of the camera barrel, and an outer periphery of the washer. A hood body formed of an elastic member mounted with a mounting portion, and pressed against the inner periphery of the mounting washer and mounted near an end thereof, from the hole of the mounting washer. Protrusion

OMPI. V IFO A shock-absorbing lens that can be freely attached and detached with a wing-touch that consists of a mounting spring with a variable diameter. Offers food

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an external view of a lens hood, FIG. ² is a vertical sectional view of the lens hood, and FIG. Fig. 3 (b) is a cross-sectional view of the mounting portion in a state where the presser button is pressed, and Figs. 4-(a) and (b) and Figs. b) is a cross-sectional view of the mounting part in the same state as in Fig. S (a),), Fig. 、 is an external view of the camera to which this lens hood is to be mounted, and Fig. 7 Figures ( _a ) to (d) are illustrations of the installation procedure for attaching the lens hood to the front end of the lens barrel of the camera, and Figure 8 shows the lens hood on the camera. FIG. 2 is an external view of a state in which a card is attached.

Best mode for carrying out the explanation

The invention will be described in detail with reference to an embodiment shown in the drawings.

As shown in FIGS. 1 and 2, the lens hood 1 of the present invention has a frusto-conical hood formed of a rubber or an equivalent elastic member while blocking light transmission. Ring body washer 3 having a slightly larger inner diameter D than the outer diameter of the front end of the lens barrel to be attached to and attached to the inner circumference on the small diameter side of the hood body. And a substantially C-shaped mounting spring 4 formed of an elastic body having an outer diameter that is pressed against the inner periphery of the mounting washer. Off over de body 2 correct equal to b Moltrasio Tsu preparative ² 1 by a constant width and facilities inside diameter length equal correct緣部22 and by a constant width outer diameter of the mounting washer 3 of the outer periphery of the large-diameter Mounting portions 23 having an inner diameter length are provided at both ends, and grooves 2 for irregularly reflecting light hitting the surfaces are provided on the inner peripheral surface at a pitch of a millimeter over the entire area, and the edge portions 2 are provided. At the boundary of the mounting portion 23, there are provided wide portions 25a, 25b for several of the above-mentioned grooves, and when the 緣 portion 22 is pushed toward the mounting portion 23, the inclined surface portion 26 is formed with the 籙 portion '22. A folding attachment portion 23 is formed inside the green portion ^{22 so as} to be concentrically overlapped with the green portion ²² . As will be described later, cutouts 27a and 27b are formed in the mounting portion at portions corresponding to holes drilled in the mounting washer 3.

The mounting washer 3 has the same outer diameter as the outer diameter of the front end of the lens barrel to which the lens hood is to be mounted. As shown in Figs. 5 (a) and 5 (b), a groove at S1 that protrudes outward from a button attached to a spring 4, which is described later, at a position different from each other by 180 °. holes ^³² a, ³² b are in the drilled inner circumferential surface (located screws) Kiyoshi at a pitch of millimeter units ³³ is applied.

The mounting spring 4 is located at a position different from the C-shaped elastic metal or elastic plastic 41, which is longer than the half inner circumference of the mounting bracket 3, and the elastic body 41 by 18 Q °. outside the thickness and off over de thickness about twice the height of the sum of the mounting portion 23 © thickness of the body of the mounting washer 3, the hole ³² a, the magnitude of the pressing button falling within b "a , 2 b with screws 3 a, 43 b Grooves (along screws) 4 are provided at a pitch in millimeters up to half of the direction.

The hood body 2 is black rubber or any equivalent.] The mounting washer 3 and the mounting spring ⁴ have their outer surfaces baked with black paint.

Hood body 2 notch 27 a on the mounting washer 3, align the position and the hole ³² a, ³² b and 27b are adhering integrated with a suitable adhesive, attached scan Prin grayed 4 elasticity Use the push buttons 24a and 24b inside the mounting washer 3).)) Insert the push buttons 24a and 24b into the holes 32a and 32b, and attach the groove 4 to the outer surface of the mounting spring 4. The mounting part is configured so that the provided part protrudes outward.

Figure 4 (a), (b) Contact good beauty ^{FIG. 5} (a), since also shows a modification of the mounting portion of the (b) Les emissions Zufu de of the present invention, FIG. 4 _(a), ( Fig. 4 (b) shows the condition shown in Fig. 4 (a) when the presser buttons ^{42a and} 42b attached to the mounting spring 4 are pushed inward. As shown in b), the outer diameter of the mounting spring is slightly smaller than the inner diameter of the front end of the lens barrel when the ends of the mounting spring are in contact with each other. A part of it has been removed. This gives the spring enough attachment to the lens barrel.

Figs. 5 (a) and 5 (b) show the mounting spring 4 in the same shape as that shown in Figs. 4 (a) and 4 (b), but pull it closer to the end. button 5 attached to a, 5 b, to mount the washer 3 wherein the mounting position of the button 'is drilled elongated holes ³⁴ a, ³⁴ b, the state shown in FIG. 5) ο: .ίπ I]? By the door and attracting button ⁴⁵ a, ⁴⁵ b and by Tsu also in the jar by the end of the attachment scan Prin grayed 4 is in contact]) to the outer diameter of the mounting scan-flops-ring 4 rather small It is what you get.

Since the lens hood of the present invention has the above-described configuration, the front end of the lens barrel of the camera will be described below with reference to the embodiments shown in FIGS. 1 to 3. Describe the procedure for attaching the lens hood to the part o

FIG. 6 is a perspective view of a camera 11 on which the lens hood of the present invention is to be mounted, 12 is a lens barrel, I ³ is a photographing lens, and W is a lens. The front end 15 of the lens barrel is a filter screw provided on the inner periphery of the front end.

Les emission's off over de 1 a front end I ⁴ Les emission's barrel 12 described above is shown in Figure 7 (a), Le emission's off over de 1 presser Remind as in Figure 7 a) button 42 a, 42 b and by the inner diameter of the front end portion I ⁴ of Les emissions's barrel the outer diameter of the mounting scan Prin grayed 4 narrowing pressing on the inside Remind as the arrow]? small rather than to the mounting Insert the mounting spring 4 until the end of the washer 3 contacts the edge of the front end W and release the presser buttons 2a and 42b. As shown in Figs. (C), (d) and Fig. 8, the lens is attached to the inner surface of the front end W, and the lens hood 1 is the lens barrel of the camera 11.

Attach to the front end 14 of 12. In this case, the filter screwing screw on the inner peripheral surface of the front end portion 14 and the groove provided on the outer periphery of the mounting spring 4 are engaged with each other, and the role of the stopper is increased.

Lens hood 1 can be easily removed by performing the above procedure in reverse order.

CMPI Industrial applicability

As described above, the present invention provides an annular mounting washer having substantially the same inner and outer diameters as the inner and outer diameters of the front end of the force lens barrel, and an elastic portion mounted on the outer periphery of the mounting washer with the mounting portion. The hood body made of a material and the inner circumference of the mounting washer are crimped and the diameter position or this position is short. The hole is mounted near the end and drilled in the mounting washer. It is possible to press the presser button that protrudes outward in the opposite direction.]? The mounting spring has a diameter that can be changed. The hood can be attached to and detached from the front end of the lens barrel with a touch, and the hood body is made of an elastic body. The climb is transmitted to the lens barrel and the mount.] In the case, inside the case. It is fear to hurt Les emission's barrel fringing Galle emission's barrel has the effect of ¾ like.

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Claims

The scope of the claims

1.) An annular mounting washer having the same inside and outside diameter as the inside and outside diameter of the front end of the camera barrel.

ω A hood body made of an elastic member attached with an attachment part outside the washer

(^) A substantially c-shaped mounting spring that presses against the inside of the mounting washer, and presses the 設け button provided on the mounting spring to attach / detach to / from the front end of the camera barrel. Lens hood for camera, consisting of changing its diameter to

2. The push button described in item 1 above shall be provided in the radial direction of the mounting nucleus.

2. The push buttons described in paragraph 1 above shall be provided near both ends of the mounting spring.

. Mounting washer of the claim 1 wherein the the this having two holes which protrude through the push button outwardly ₀

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