JP3102166B2 - Hood mounting bayonet structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hood mounting bayonet structure for a device having a photographic lens, a video lens and the like .
And food .

[0002]

2. Description of the Related Art A conventional hood-attached bayonet structure is constructed as shown in FIGS. That is,
It is configured like a lens barrel structure shown in FIG. 6 and a hood structure shown in FIG. 7, and its attachment can be explained from a developed view shown in FIG. 8 and a perspective view shown in FIG.

In FIGS. 6 and 8, 50 is a conventional lens barrel, 51 is a bayonet claw, 51a is a stopper, 52 is a click, and 53 is a slide.

7 and 8, reference numeral 60 denotes a hood, 61 denotes a bayonet claw when the hood is used, 61a denotes a charging section when the hood is used, 62 denotes a bayonet claw when the hood is stored, and 62a denotes a charging section when the hood is stored. Further, a portion where the bayonet claw 61 when the hood is used and the bayonet claw 62 when the hood is stored is a hood-side stopper portion 63, and this configuration develops a circular shape in a diagonal direction.
It is a real nail bayonet.

Next, the operation will be described. Arrow 70 indicating operation direction
As shown in the figure, when the hood 60 is inserted into the lens barrel 50 and then the hood 60 is rotated in the direction of the arrow 71, the hood-use charging portion 61a of the hood 60
The hood-side stopper 63 abuts the stopper 51a of the lens barrel 50 at the same time as the slidable portion 53 slides and engages the click portion 52, and the hood mounting operation is completed.

[0006]

[SUMMARY OF THE INVENTION However, in the above conventional example, a click feeling when mounting the hood to the lens barrel, to improve the feel in both the stowed and use thereof when
The difficult, also because the hood side click portion is relatively small in protrusion shape, progress of wear rather quickly, the click good
Feeling could not be maintained for a long time.

[0007] The present invention has been made to solve the above problems, satisfactory in both the feel of a click feeling is stowed and in use when attaching the hood to the lens barrel, and its good feel rather long and to provide Ru unsustainable hood attachment bayonet structure and a hood.

[0008]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 of the present application provides a hood with a regular hood.
Hood for attaching to lens barrel in opposite direction
A lens bayonet structure, wherein the lens barrel is
The hood having a plurality of bayonet claws along a direction;
Is the thrust corresponding to the thickness of the bayonet claw of the lens barrel.
Separated in the direction and one end is joined by the joint
The pair of bayonet claws along the circumferential direction with the lens mirror
A plurality of bayonet claws having the same number as the bayonet claws of the cylinder;
In the vicinity where the ends of the pair of net nails are adjacent to each other,
When installing the lens barrel in the opposite direction,
A flat surface that slides while charging the outer circumference of the net
In the outer periphery of the bayonet claw of the lens barrel,
Guide the flat part of the hood to the mounting end of the hood
The introduction section to be inserted into the outer periphery of the bayonet claw of the lens barrel
In front of the hood at the mounting end of the hood at
An engaging portion with which the plane portion engages is provided.
3. A hood-attached bayonet structure according to claim 2,
The invention is characterized in that the connecting portion of the hood is provided on the lens barrel.
2. A striking stopper against a girder stopper.
4. The hood-attached bayonet structure according to claim 3, wherein
The described invention has a plurality of bayonet claws along the circumferential direction.
The lens barrel in the opposite direction to the proper one.
And a hood that can be installed in the lens barrel.
And the ends are separated from each other in the thrust direction by the thickness of the claw.
A pair of bayonet claws joined by a joint
Have the same number as the bayonet claws of the lens barrel along the direction,
Around where the ends of the plurality of bayonet claw pairs are adjacent to each other
In addition, when mounting in both the normal direction and the opposite direction,
Introduced into the bayonet claw of the lens barrel from its introduction
After sliding while charging the outer circumference, the lens barrel
A special feature is that a flat portion is provided for engagement with the engagement portion of the yonett claw.
The invention as set forth in claim 4 is the above-mentioned hood.
The joint abuts against a stopper provided on the lens barrel
4. The hood according to claim 3, wherein:

[0009]

According to the present invention, when the hood is used and stored,
And the opposite direction), a common charge section is set,
In addition, since the charging portion is a flat portion, the click feeling when the hood is attached to the lens barrel is different in either case.
If also good, and it is possible to constitute the good feel is Ru be sustained rather long Fu <br/> de mounting bayonet structure and hood.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a hood and a lens barrel showing the structure of one embodiment of the present invention. FIG. 2 is a front view of a lens barrel showing the features of one embodiment of the present invention. FIG. 3 is a front view of a hood according to one embodiment of the present invention, and FIG. 4 is a developed view showing a lens barrel and a hood according to one embodiment of the present invention.

2 and 4, reference numeral 10 denotes a lens barrel, 11 denotes a bayonet claw for attaching a hood,
11a is a click sensation part which is a flat part which makes a click feeling tactile, 11b is a charge part introduction part which is a plane part for introducing a hood side charge part, 11c
Is a stopper portion, and this configuration is a two-claw bayonet having the same shape developed in a diagonal direction.

In FIG. 3, reference numeral 20 denotes a hood;
Is a bayonet claw when the hood is used, 22 is a bayonet claw when the hood is stored, and one end adjacent to the two bayonet claws is shifted by the thrust thickness of the bayonet claw 11 of the lens barrel 10 by the thrust position, and is connected by the connecting portion 23. The components are integrated, and the configuration is arranged diagonally in the same shape. In addition, between the two ends of the bayonet claws 21 and 22 other than the joint 23 and the two ends of the bayonet claws of other phases,
A hood-side charging portion, which is a flat portion that slides while charging the outer periphery of the bayonet claw 11 of the lens barrel 10 shown in FIG. Further, reference numeral 25 denotes an elastic hole portion for increasing the elasticity of the hood-side charging portion 24.

Next, the operation will be described. Arrow 30 indicating operation direction
As described above, the hood 20 is inserted into the lens barrel 10, and at this time, the hood-side charging portion 24, which is the flat portion of the hood 20, is for the charging portion introduction portion 11 b which is the flat portion of the lens barrel 10. Does not interfere. Next, when the hood 20 is rotated in the direction of arrow 31, the hood-side charging portion 24 of the hood 20 rides on the outer peripheral portion of the bayonet claw 11 from the charging portion introduction portion 11b of the lens barrel 10, and the elasticity of the entire hood 20 is increased. It slides while being charged by the deformation and the elasticity of the elastic hole 25. And arrow 3
When the hood 20 is rotated in one direction, the hood-side charging portion 24 of the hood 20 is charged by the click sensation portion 11a, which is a flat portion of the lens barrel 10, to relieve the click sensation and at the same time reproduce the click sensation. The connecting portion 23 of the hood 20 abuts the stopper portion 11c of the cylinder 10,
The hood mounting operation is completed.

When the hood is stored, the functions and operations of the respective parts are the same, except that the thrust direction of the hood 20 is reversed and the rotational phase is shifted by 90 °. Further, in the present embodiment, the bayonet claw is described as a two-claw bayonet having the same shape in the diagonal direction, but the action and the effect are not changed even with three or more claws.

[0016]

As described above, according to the present invention,
When using the hood and when storing (reverse to the regular direction)
Charge section is set and this charge section is flat
The hood is attached to the lens barrel.
The lick feeling is good in both cases and good
Hood-attached bayonet structure for long lasting feel
In addition, there is an effect that the hood can be configured .

[Brief description of the drawings]

FIG. 1 is a perspective view of a hood and a lens barrel showing a structure of an embodiment of the present invention.

FIG. 2 is a front view of a lens barrel showing features of one embodiment of the present invention.

FIG. 3 is a front view of a hood according to one embodiment of the present invention.

FIG. 4 is a development view showing the development of the lens barrel and the hood according to one embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional hood and a lens barrel.

FIG. 6 is a front view showing a conventional lens barrel.

FIG. 7 is a front view showing a conventional hood.

FIG. 8 is a developed view for explaining the operation of the conventional example.

[Explanation of symbols]

 Reference Signs List 10 lens barrel 11 bayonet claw 11a click feeling part 11b charging part introduction part 11c stopper part 20 hood 21 bayonet claw when using hood 22 bayonet claw when storing hood 23 coupling part 24 hood side charging part 25 elastic hole part 50 lens barrel 51 Bayonet claw 51a Stopper section 52 Click section 53 Sliding section 60 Hood 61 Bayonet claw when using hood 61a Charging section when using hood 62 Bayonet claw when storing hood 62a Charging section when storing hood 63 Hood side stopper

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 61-89826 (JP, U) Japanese Utility Model Sho 63-2929 (JP, U) Japanese Utility Model Hei 2-36822 (JP, U) Japanese Utility Model Hei 4- 13908 (JP, U) Japanese Utility Model Showa 64-30539 (JP, U) Japanese Utility Model Showa 35-13716 (JP, Y1)

Claims (4)

(57) [Claims] 1. A lens mirror in which a hood is turned in a direction opposite to a normal direction.
With hood mounting bayonet structure for mounting on a cylinder
The lens barrel has a plurality of bayonet claws along a circumferential direction.
And the hood has a thickness of a bayonet claw of the lens barrel.
Distance in the thrust direction and one end
The pair of bayonet claws joined together in the circumferential direction
The same number of bayonet claws of the lens barrel are provided, and the ends of the plurality of bayonet claw pairs of the hood are adjacent to each other.
Near both the normal and reverse directions.
The outer periphery of the bayonet claw of the lens barrel
And a flat portion that slides on the outer periphery of the bayonet claw of the lens barrel.
Introduce the flat part of the hood into the mounting start end of the
Into the outer periphery of the bayonet claw of the lens barrel.
The flat end of the hood
A hood characterized in that an engaging portion with which the surface portion engages is provided.
Bayonet structure. 2. The lens mirror according to claim 2 , wherein the coupling portion of the hood is the lens mirror.
A contract that comes in contact with a stopper provided on the cylinder
The hood-attached bayonet structure according to claim 1. 3. A plurality of bayonet claws along a circumferential direction.
The lens barrel in the opposite direction to the proper one.
And a thrust direction corresponding to the thickness of the bayonet claw of the lens barrel.
Are separated and one end is joined by a joint
Insert a pair of bayonet claws along the circumferential direction of the lens barrel.
The same number as the bayonet claws, near where the ends of the plurality of bayonet claw pairs are adjacent to each other
In addition, when mounting in both the normal direction and the opposite direction,
Introduced into the bayonet claw of the lens barrel from its introduction
After sliding while charging the outer circumference, the lens barrel
A special feature is that a flat portion is provided for engagement with the engagement portion of the yonett claw.
Hood to be a sign. 4. The lens according to claim 1, wherein said connecting portion is provided on a lens barrel.
4. The method according to claim 3, wherein the upper surface abuts against the topper.
hood.