JP2000089332A - Mounting structure of camera lens assembly - Google Patents

Abstract

(57) [Problem] To provide a camera in which a lens barrel unit can be securely attached to a camera body by increasing a pressing force of a lens barrel unit against a camera body side due to a spring reaction force of a spring portion. Provided is a mounting structure for a lens assembly. SOLUTION: An elastic deformation portion 19 of a lens side mount member 17 is inserted into an insertion portion 7 of a main body side mount member 2, and a lens barrel unit 15 is rotated by a predetermined amount, so that a spring portion 21 of the elastic deformation portion 19 is rotated. Is brought into contact with the inner surface portion of the spring contact portion 6, and one and the other peak portions 23 of these spring portions 21,
The lens barrel unit 15 is elastically deformed, and the lens barrel unit 15 is pressed against the camera body 1 by the spring reaction force, so that the lens-side electrical contact 26 contacts the body-side electrical contact 9, and the lens barrel unit 15 is moved to the camera body 1. Attach to 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mounting structure for a lens assembly of a camera such as a CCTV camera.

[0002]

2. Description of the Related Art There is a conventional bayonet mount type mounting structure for a lens assembly of this type. This bayonet mount type mounting structure includes a metal main body side mounting member 31 mounted on the front part of the camera main body of the CCTV camera.
As shown in FIG. 6, a peripheral wall 3
4 is mounted, and a plurality of spring contact portions 36 are provided on the front peripheral portion 34a of the peripheral wall portion 34 of the mount member body 35 at predetermined intervals in the circumferential direction. Spring contact portions 3
An insertion portion 37 is provided between the six portions.

A lens-side mount member 39 is fixed to the base end of the lens barrel. The lens-side mount member 39 is, as shown in FIG. A plurality of elastic deformation portions 41 are formed at predetermined intervals in the circumferential direction on the portion 40a, and these elastic deformation portions 41 are cantilevered to the holding portion 43 as shown in FIGS. The spring portion 42 is formed.

Then, the elastic portion 41 of the lens-side mount member 39 is inserted into the insertion portion 37 of the main-body-side mount member 31, and the lens barrel is rotated by a predetermined amount, so that the spring portion 42 of the elastic deformable portion 41 is moved. The spring 42 is brought into contact with the inner surface of the spring contact portion 36 to elastically deform the spring 42 as shown by the dotted line in FIG. Is pressed against the camera body, and the lens barrel is attached to the camera body.

[0005]

However, in the above-mentioned conventional mounting structure for a lens assembly of a camera,
Spring portion 42 in which elastic deformation portion 41 is cantilevered by holding portion 43
, The spring portion 42 is connected to the spring contact portion 3.
6 is elastically deformed by contacting the inner surface of the spring portion 6, the spring reaction force due to the elastic deformation of the spring portion 21 is weak.
However, there is a problem that the pressing force of the lens barrel against the camera body side is weakened.

When the elastically deforming portion 41 is constituted by an arch-shaped spring portion 42-1 held by both holding and holding portions 41A and 41B as shown in FIG. 9, the spring portion 42 becomes a spring contact portion. There is a problem in that when it comes into contact with the inner surface of No. 36, it is plastically deformed and no spring property is obtained.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to reduce the pressing force of the lens barrel unit against the camera body due to the spring reaction force of the spring portion. It is an object of the present invention to provide a mounting structure of a lens assembly of a camera, which is large and can surely mount a lens barrel unit to a camera body.

[0008]

According to a first aspect of the present invention, there is provided a camera lens assembly mounting structure according to the first aspect of the present invention, wherein a peripheral wall portion is provided on a peripheral portion of a seat surface portion provided on a camera body. A plurality of spring contact portions are formed at predetermined intervals in the circumferential direction on the peripheral edge portion of the peripheral wall portion, and the adjacent spring contact portions are formed as insertion portions and connected to the power supply to the seat surface portion. A body-side mount member provided with the shoe member-side electrical contact provided, and a plurality of elastically deformable portions projecting from the outer peripheral edge of the mount member body at predetermined circumferential intervals at the lens barrel unit. A unit-side electrical contact for connecting these elastically deformable portions to a holding member located on both sides by connecting and holding a double mountain-shaped spring portion having a valley at the center between both holding portions and connecting to an automatic aperture driving source. A lens-side mount member having By inserting the elastically deformable portion of the lens-side mount member into the insertion portion of the body-side mount member and rotating the lens barrel unit by a predetermined amount, the spring portion of the elastically deformable portion is brought into contact with the spring. The lens barrel unit is pressed against the camera body side by a spring reaction force caused by the elastic deformation of these spring portions by abutting against the inner surface portion of the lens portion, and the lens-side electric portion is pressed. A contact is brought into contact with the main body side electrical contact.

According to another aspect of the present invention, there is provided a lens assembly mounting structure for a camera, comprising:
2. The mounting structure for a lens assembly of a camera according to claim 1, wherein the spring portion has one and the other ridges on the left and right with the valley in the middle, and one ridge is on the opposite side to the valley. And the other crest portion is connected to the other holding portion on the side opposite to the valley portion.

According to another aspect of the present invention, there is provided a lens assembly mounting structure for a camera, comprising:
3. The mounting structure for a lens assembly of a camera according to claim 1, wherein the elastically deformable portion of the lens-side mount member is inserted into the insertion portion of the body-side mount member, and the lens barrel unit is rotated by a predetermined amount. With this, a stopper means for positioning the lens-side mount member to the main-body-side mount member when the spring portion of the elastically deformable portion is brought into contact with the inner surface of the spring contact portion and these spring portions are elastically deformed. Equipped.

According to another aspect of the present invention, there is provided a camera lens assembly mounting structure, comprising:
4. The mounting structure for a lens assembly of a camera according to claim 3, wherein the stopper means includes a stopper pin provided on a lever member provided on the main body side mounting member and a stopper pin provided on the lens side mounting member. The lever member and the stopper pin were formed integrally with the body-side mount member.

According to another aspect of the present invention, there is provided a camera lens assembly mounting structure, comprising:
In the mounting structure for a lens assembly of a camera according to claim 1, 2, 3, or 4, the body-side mount member and the lens-side mount member are formed of synthetic resin.

With this configuration, the elastic deformation portion of the lens-side mount member is inserted into the insertion portion of the body-side mount member, and the lens barrel unit is rotated by a predetermined amount, so that the spring portion of the elastic deformation portion comes into contact with the spring. When these spring portions are elastically deformed by being brought into contact with the inner surface portion of the portion, these elastically deformed portions form a double mountain-shaped spring portion having a valley in the center between holding portions located on both sides. Due to the double-sided structure, not only the spring reaction force due to the elastic deformation of the spring part becomes large, but also the plastic deformation occurs when the spring part comes into contact with the inner surface of the spring contact part. Since there is no spring force, the pressing force of the lens barrel unit against the camera body due to the spring reaction force of the spring portion is increased, and the lens barrel unit can be securely attached to the camera body.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mounting structure for a lens assembly of a camera according to the present invention is provided on a camera body and has a peripheral wall standing upright on a peripheral portion of a seating surface. A plurality of spring contact portions formed at predetermined intervals in the direction, a shoe member-side electric contact connected to a power supply connected to a power source is provided on the seat surface portion between adjacent spring contact portions as an insertion portion. A plurality of elastically deformable portions provided on the outer mount member and the outer peripheral edge of the mount member main body at predetermined intervals in the circumferential direction are provided on the side mount member and the lens barrel unit, and these elastically deformable portions are positioned on both sides. A lens-side mount member comprising a double-sided spring portion having a valley at the center between the holding portions, and a unit-side electrical contact connected to an automatic aperture drive source, and The elastic deformation portion of the side mount member By inserting into the insertion portion of the body-side mount member and rotating the lens barrel unit by a predetermined amount, the spring portion of the elastic deformation portion is brought into contact with the inner surface of the spring contact portion, These spring portions are elastically deformed, and the lens barrel unit is pressed against the camera body side by a spring reaction force due to the elastic deformation of these spring portions, and the lens side electrical contacts are brought into contact with the body side electrical contacts. It is characterized by having.

With this configuration, the elastic deformation portion of the lens-side mount member is inserted into the insertion portion of the body-side mount member, and the lens barrel unit is rotated by a predetermined amount, so that the spring portion of the elastic deformation portion comes into contact with the spring. When these spring portions are elastically deformed by being brought into contact with the inner surface portion of the portion, these elastically deformed portions form a double mountain-shaped spring portion having a valley in the center between holding portions located on both sides. Due to the double-sided structure, not only the spring reaction force due to the elastic deformation of the spring part becomes large, but also the plastic deformation occurs when the spring part comes into contact with the inner surface of the spring contact part. Since there is no spring force, the pressing force of the lens barrel unit against the camera body due to the spring reaction force of the spring portion is increased, and the lens barrel unit can be securely attached to the camera body.

According to a second aspect of the present invention, there is provided a camera lens assembly mounting structure according to the first aspect, wherein the spring portion is provided on the left and right sides of the valley portion. With one and the other peaks present, one peak is connected to one holding part on the opposite side to the valley, and the other peak is connected to the other holding part on the opposite side to the valley. did.

With this configuration, when the spring portion of the elastic deformation portion is brought into contact with the inner surface of the spring contact portion and these spring portions are elastically deformed, one and the other peak portions of the spring portion are elastically deformed. Since the valleys shift linearly, the springs are not plastically deformed. In addition, since the springs have a double-ended configuration, the spring reaction force due to the elastic deformation is large. Therefore, the same function and effect as the above-described claim 1 can be obtained.

According to a third aspect of the present invention, there is provided a camera lens assembly mounting structure according to the first or second aspect, wherein the elastic deformation portion of the lens side mounting member is provided. Is inserted into the insertion portion of the body-side mount member, and the lens barrel unit is rotated by a predetermined amount so that the spring portion of the elastically deforming portion comes into contact with the inner surface of the spring contact portion, and these spring portions are removed. A stopper is provided for positioning the lens-side mount member on the main-body-side mount member when the lens is elastically deformed.

With this configuration, not only can the same operation and effect as those of the first aspect of the invention be achieved, but also when the spring portion is elastically deformed, the lens-side mount member is moved by the stopper means to the main-body-side mount member. It can be positioned on a member.

According to a fourth aspect of the present invention, in the mounting structure of the camera lens assembly according to the third aspect, the stopper means is provided on the main body side mounting member. A stopper pin provided on the lever member and a pin hole provided on the lens-side mount member and engaged with the stopper pin are formed, and the lever member and the stopper pin are formed integrally with the body-side mount member.

With this configuration, not only can the same operation and effect as the above-described first embodiment be obtained, but also when the spring portion is elastically deformed, the stopper pin provided on the lever member is engaged with the pin hole. By combining, the lens side mount member can be positioned with respect to the main body side mount member, and by operating the lever member, the positioning can be released by removing the stopper pin from the pin hole. Moreover, since the lever member and the stopper pin are integrated with the body-side mount member, the number of parts can be reduced.

According to a fifth aspect of the present invention, there is provided a camera lens assembly mounting structure according to the first, second, third, or fourth aspect. The body-side mount member and the lens-side mount member are formed of a synthetic resin.

According to this configuration, not only the same operation and effect as the above-described first embodiment can be obtained, but also the main body-side electric contact provided on the main body-side mount member and the lens-side electric contact provided on the lens-side mount member. The contacts are insulated, and no special insulation configuration is required.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

On the front surface of the camera body 1 of the CCTV camera, a body-side mount member 2 made of synthetic resin is fixed.
As shown in FIGS. 1 and 2, the main body-side mount member 2 has a mount member main body 5 in which a peripheral wall portion 4 is raised on a peripheral portion of the seat surface portion 3. Four spring contact portions 6 are formed in the front peripheral edge portion 4a of the portion 4 at predetermined intervals in the circumferential direction in an eaves shape, and an insertion portion 7 is formed between adjacent spring contact portions 6. . Further, a circular hole 8 is formed in the center of the seat surface 3 of the mount member main body 5, and a plurality of camera body side electrical contacts 9 are formed on the seat surface 3 so as to be located concentrically with the circular hole 8. It is provided. These body-side electrical contacts 9 are connected to a circuit for controlling the aperture of a lens built in the camera body 1.

The seat 3 is provided with a stopper mechanism 10 as a stopper means. The stopper mechanism 10 is provided with an edge 11 a of an opening 11 formed in the seat surface 3.
And a lever member 13 swinging back and forth with the connecting portion 12 as a fulcrum. A stopper pin 14 is attached to the lever member 13, and the stopper pin 14 is opened. It protrudes forward from the inside of the part 11 (in the direction perpendicular to the paper surface in FIG. 2).

The lens barrel unit 15 includes the lens barrel 1
6 and a lens-side mount member 17 fixed to the base end of the lens barrel 16. The lens barrel 16 includes a lens (not shown) and an automatic aperture driving unit (not shown). Built-in.

As shown in FIG. 3, the lens-side mount member 17 has an annular mount member body 18 made of synthetic resin, and an outer peripheral portion 18 of the mount member body 18.
a has four elastically deformable portions 1 at predetermined intervals in the circumferential direction.
9 protrudes integrally with the mount member body 18.
These elastic deformation portions 19 are provided with holding portions 20 located on both sides.
A spring portion 21 is integrally formed between A and 20B, and the spring portion 21 has a double mountain shape having a valley portion 22 at the center thereof. That is, one and the other ridges 23 and 24 are present on the left and right with the valley 22 in the middle, and the one ridge 23 is connected to the one holding portion 20A on the opposite side to the valley 22; The other peak portion 24 is connected to the other holding portion 20B on the opposite side to the valley portion 22.

The mount member body 18 is provided with a plurality of lens-side electrical contacts 26 located concentrically with the circular hole 25.
Is connected to an automatic iris drive unit (not shown). Also,
The mount member main body 18 has a pin hole 27 formed therein.

Then, the four elastically deforming portions 19 of the lens side mounting member 17 are inserted into the four insertion portions 7 of the main body side mounting member 2 and the lens barrel unit 15 is rotated by a predetermined amount, so that the elastically deforming portion 19 is rotated. The 19 spring portions 21 are brought into contact with the inner surfaces of the four spring contact portions 6, and one and the other peak portions 23 and 24 of these spring portions 21 are elastically deformed as shown by the dotted lines in FIG. In this case, the one and the other peaks 23 and 24 of the spring portion 21 are elastically deformed and the valley portion 22 shifts linearly, so that the spring portion 21 is not plastically deformed. Is a two-sided configuration,
The spring reaction force due to the elastic deformation becomes large.

The elastic deformation of these spring portions 21 generates a spring reaction force, and this spring reaction force is applied to the lens barrel unit 1.
5 against the camera body 1 and the stopper mechanism 1
The stopper pin 14 provided on the lever member 13 of the No. 0 engages with the pin hole 27 of the mount member main body 18, and the lens side electric contact 26 comes into contact with the main body side electric contact 9, so that the lens barrel unit 15 is moved. It is attached to the camera body 1.

When the lens barrel unit 15 is detached from the camera body 1, the lever member 13 is pressed against the camera body 1 and the stopper pin 14 is inserted into the pin hole 27.
Then, by rotating the lens barrel unit 15 by a predetermined amount, the elastically deformable portion 19 is positioned at the insertion portion 7, and the lens barrel unit 15 is pulled out.

As described above, the lens-side mount member 1
7 is inserted into the insertion portion 7 of the main body side mounting member 2.
And by rotating the lens barrel unit 15 by a predetermined amount, the spring portion 21 of the elastic deformation portion 19 is brought into contact with the inner surface of the spring contact portion 6 to elastically deform these spring portions 21. In this case, since these elastically deformable portions 19 are formed by holding both-sided spring portions 23 and 24 each having a valley portion 22 at the center between the holding portions 20A and 20B located on both sides, both ends are connected. In addition, not only the spring reaction force due to the elastic deformation of the spring portion 21 becomes large, but also the plastic deformation does not occur when the spring portion 21 contacts the inner surface of the spring contact portion 6.
The pressing force of the lens barrel unit 15 against the camera body 1 due to the spring reaction force of the spring portion 21 increases, and the lens barrel unit 15 can be securely attached to the camera body 1.

The spring portion 21 has one and the other ridges 23 and 24 on the left and right with the valley 22 as the center, and holds one ridge 23 on the opposite side to the valley 22 from the other. Part 20
A, and the other crest portion 24 is connected to the other holding portion 20B on the opposite side to the valley portion 22, so that the elastic deformation portion 1
9 by contacting the spring portion 21 with the inner surface of the spring contact portion 6.
When these spring portions 21 are elastically deformed, the spring portions 21
One and the other crests 23 and 24 are elastically deformed and the valley 2
Since 2 moves in a straight line, the spring portion 21 does not undergo plastic deformation, and since the spring portion 21 has a two-sided configuration, the spring reaction force due to elastic deformation is large.

Since the body-side mount member 2 and the lens-side mount member 17 are formed of synthetic resin, they are provided on the body-side electrical contact 9 and the lens-side mount member 17 provided on the body-side mount member 2. Since the lens-side electrical contact 26 is insulated, a special insulation configuration is not required.

As described above, in the mounting structure for the lens assembly of the camera according to the present invention, the elastically deformable portion of the lens-side mount member is inserted into the insertion portion of the body-side mount member, and the lens barrel is mounted. By rotating the unit a predetermined amount,
When the spring portion of the elastically deforming portion is brought into contact with the inner surface of the spring contact portion and these spring portions are elastically deformed, these elastically deformable portions are located between the holding portions located on both sides and have a valley at the center thereof. Since the double mountain-shaped spring portion having a portion is connected and held by both ends, not only the spring reaction force due to the elastic deformation of the spring portion becomes large, but also the spring portion is attached to the inner surface of the spring contact portion. Since the plastic deformation does not occur at the time of contact, the pressing force of the lens barrel unit against the camera body due to the spring reaction force of the spring increases, and the lens barrel unit is securely attached to the camera body. Can be.

When the spring portion of the elastically deforming portion is brought into contact with the inner surface of the spring contact portion and these spring portions are elastically deformed, one and the other peak portions of the spring portion are elastically deformed. Since the valleys move linearly, the springs are not plastically deformed, and since the springs are of a double-supported structure, the spring reaction force due to the elastic deformation is large.

Further, since the body-side mount member and the lens-side mount member are formed of synthetic resin, the body-side electrical contact provided on the body-side mount member and the lens-side electrical contact provided on the lens-side mount member are provided. Are insulated, and a special insulating configuration is not required.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view of a mounting structure of a lens assembly of a camera according to the present invention.

FIG. 2 is a plan view of a main body side mounting member of the mounting structure of the lens assembly of the camera.

FIG. 3 is a plan view of a lens-side mount member of a mounting structure of the lens assembly of the camera.

FIG. 4 is a side view of the lens barrel unit.

FIG. 5 is an explanatory view of an elastic deformation portion of the lens barrel unit.

FIG. 6 is a plan view of a main body side mounting member of a conventional camera lens assembly mounting structure.

FIG. 7 is a plan view of a lens-side mount member of the lens assembly mounting structure of the camera.

FIG. 8 is an explanatory view of an elastic deformation portion of the lens barrel unit.

FIG. 9 is an explanatory view of an elastically deformable portion of another lens barrel unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Camera main body 2 Main body side mounting member 6 Spring contact part 7 Insertion part 9 Main body side electrical contact 10 Stopper mechanism part (stopper means) 11 Opening part 12 Connecting part 13 Lever member 14 Stopper pin 15 Lens barrel unit 17 Lens side mount Member 19 Elastic deformation part 21 Spring part 23 Mountain part 24 Mountain part 26 Lens side electrical contact 27 Pin hole

Continuing on the front page (72) Inventor Susumu Kawakami 73, Nanase Oaza, Nakano City, Nagano Prefecture Inside the R & D Headquarters, Koshina Co., Ltd. (72) Inventor Hironobu Takekuma 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. F term in Industrial Co., Ltd. (reference) 2H044 AJ05 AJ06 2H101 EE08 EE13 EE34 EE43

Claims (5)

[Claims] 1. A peripheral wall portion is provided on a camera body and rises around a peripheral portion of a seating surface portion. A plurality of spring contact portions are formed on a peripheral edge portion of the peripheral wall portion at predetermined intervals in a circumferential direction. A body-side mount member provided with a shoe member-side electrical contact connected to a power source on the seat surface between the matching spring contact portions as an insertion portion, and an outer peripheral edge of the mount member body provided on the lens barrel unit A plurality of elastically deformable portions project from the portion at predetermined intervals in the circumferential direction, and these elastically deformable portions are formed with a double mountain-shaped spring portion having a valley in the center between the holding portions located on both sides. A lens-side mounting member having a unit-side electrical contact connected to an automatic iris drive source, the elastically deforming portion of the lens-side mounting member being inserted into the insertion portion of the body-side mounting member. Insert the lens barrel By rotating the knit by a predetermined amount, the spring portion of the elastic deformation portion is brought into contact with the inner surface portion of the spring contact portion, and these spring portions are elastically deformed. A mounting structure for a camera lens assembly, wherein the lens barrel unit is pressed against the camera body by a spring reaction force, and the lens-side electrical contact is brought into contact with the body-side electrical contact. 2. A spring portion having one and the other ridges on the left and right with a valley in the middle, connecting one ridge to one holding portion on the side opposite to the valley, and connecting the other ridge to the other ridge. 2. The mounting structure for a lens assembly of a camera according to claim 1, wherein the portion is connected to the other holding portion on the side opposite to the valley portion. 3. The elastic deformation portion of the lens side mount member is inserted into the insertion portion of the main body side mount member, and the lens barrel unit is rotated by a predetermined amount, so that the spring portion of the elastic deformation portion becomes the spring contact portion. 3. The camera lens according to claim 1, further comprising stopper means for positioning the lens-side mount member on the main-body-side mount member when the spring portions are elastically deformed by being brought into contact with the inner surface portion. Assembly mounting structure. 4. The stopper means comprises a stopper pin provided on a lever member provided on the main body side mounting member, and a pin hole provided on the lens side mounting member and engaged with the stopper pin. 4. The stopper pin is formed integrally with the body-side mount member.
5. The mounting structure of the lens assembly of the camera according to 4. 5. The body-side mount member and the lens-side mount member are formed of a synthetic resin.
5. A mounting structure for a lens assembly of a camera according to claim 3 or claim 4.