JP2883272B2 - Lens holding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens gripping device used for an on-vehicle surveillance camera for monitoring a blind spot or the like with an image.

[0002]

2. Description of the Related Art Generally, a rear part of a car is blind spot for a driver. Therefore, as shown in FIG. When the camera is set to "back) R", the on-vehicle surveillance camera 1 is operated to obtain an image of the rear periphery of the vehicle body, and this image is displayed on a monitor television installed in the vehicle. A known car is known. The on-vehicle surveillance camera 1 usually has a vehicle body C through a transparent glass in order to prevent damage and waterproof.
The television camera body is installed inside the outer case so that the rear (R) of the AR can be imaged.

FIG. 5 is a cross-sectional view for explaining a conventional in-vehicle monitoring camera 1. As shown in FIG. As shown in FIG. 5, the exterior case 2 of the on-vehicle surveillance camera 1 has an opening 2a corresponding to the size of the lens of the lens barrel 9, and supports 2b and 2c are formed on the inner surface around the opening 2a. Have been. On the inner surface of the outer case 2, a transparent glass plate 4 around which a rubber 3 for waterproofing is mounted is provided so as to cover the opening 2a while making the rubber 3 contact the inner surface around the opening 2a. Have been. A glass pressing plate 5 is fixed to the support portions 2b and 2c via screws 6 so as to press the rubber 3 toward the inner surface of the outer case 2. Rubber 3 by plate 5
The glass plate 4 is fixed to the inside of the outer case 2 via the rubber 3 by the pressing force. At this time, a predetermined pressing force is generated at the joint between the rubber 3 and the glass plate 4 and the inner surface of the outer case 2 by appropriately setting the fastening state of the screw 6, and the outer case 2 is connected via the joint. Water can be prevented from entering from outside to inside. In addition, the plate 8 fixed to the plate 5 via the screw 7 includes:
A lens barrel 9 is fixed so that images can be taken from inside to outside of the outer case 2 via the glass plate 4.

[0004]

However, the on-vehicle surveillance camera 1 described above has a problem that the number of parts is large because two plates 5 and 8 are required, and the structure is complicated. In addition, the in-vehicle surveillance camera 1 has a problem in that the structure is complicated, so that when the operation of attaching the lens barrel 9 inside the small outer case 2 or the like becomes difficult, the operation becomes difficult.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a lens gripping device having a small number of parts, a simple configuration, and an excellent waterproof function.

[0006]

In order to solve the above-mentioned conventional problems and to achieve the above-mentioned object, a lens holding device of the present invention covers an opening of a case from the inside of the case.
Camera that captures the outside of the case through a transparent plate
A lens holding device for holding a lens, wherein the transparent plate
Waterproof elastic member provided with a recess for mounting near the outer periphery of the
And a convex portion located along the concave portion.
Using the same member as the main body and the main body
Formed in one piece and fitted with a transparent plate of the elastic member
The portion is directed toward the transparent plate by the convex portion of the main body.
Removably fixed to the case so as to be pressed
Lens housing means having a joint portion.

Further, in the lens holding device of the present invention, a case having an opening is provided so as to cover the opening of the case.
Transparent plate and the transparent plate provided from the inside of the case
Waterproof elastic member provided with a recess for mounting near the outer periphery of the
And a convex portion located along the concave portion.
Using the same member as the main body and the main body
Formed in one piece and fitted with a transparent plate of the elastic member
The portion is directed toward the transparent plate by the convex portion of the main body.
Removably fixed to the case so as to be pressed
Lens housing means having a joint portion .

[0008]

According to the lens holding device of the present invention, the transparent plate is pressed against the peripheral edge of the opening of the case by the projection. Due to the pressing force, the joint between the transparent plate and the case comes into close contact with each other, and it is possible to effectively suppress water from entering the inside of the case from the outside through the joint.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An on-vehicle surveillance camera according to an embodiment of the present invention will be described below. The on-vehicle surveillance camera according to the present embodiment is mounted on the rear of the vehicle in the same manner as a conventional on-vehicle surveillance camera.
1 is an exploded perspective view of the on-vehicle surveillance camera 11 of the present embodiment, FIG. 2 is a plan view of the lens barrel 15 viewed from the direction of arrow A shown in FIG. 1, and FIG. 3 is a sectional line BB shown in FIG. 2 is a sectional view of the on-vehicle surveillance camera 11 in FIG. As shown in FIGS.
The outer case 12 has, for example, a circular opening 12a, and support portions 12b and 12c are formed on the inner surface of the outer case 12 at positions facing each other across the opening 12a. Screw holes 12b1 and 12c1 for mounting the lens barrel 15 are formed in the support portions 12b and 12c. On the inner surface of the outer case 12, a glass plate 14 on which rubber 13 is mounted is provided along the outer periphery of the outer case 12 while the rubber 13 is in contact with the peripheral edge of the opening 12a.

The lens barrel 15 includes a cylindrical lens barrel body 15 d for holding the lens 17 and a lens barrel body 1.
Plates 15b and 15c provided at opposing positions around 5d are integrally formed. Holes 15b1, through which screws 17a, 17b can be inserted into screw holes 12b1, 12c1, are formed in plates 15b, 15c.
15c1 are formed. The lens barrel 15 is a screw 1
7a and 17b are connected to holes 15b1 of plates 15b and 15c,
15c1 and the screw holes 1 of the support portions 12b and 12c
2b1 and 12c1, the supporting portions 12b and 1c are inserted.
2c. A convex portion 15a having a flat surface is formed on the front surface of the lens barrel main body 15d viewed from the direction of arrow A so as to surround the lens 17. On the other hand, a shutter 16 is provided on the back surface of the lens barrel main body 15d.

When the lens barrel 15 is fixed to the support portions 12b and 12c, the convex portion 15a of the lens barrel 15 is attached to the outer case 12 at a ring-shaped portion where the glass plate 14 and the rubber 13 overlap. Press toward the inner surface of. Therefore, if the fastening condition of the screws 17a and 17b is appropriately set, a predetermined pressing force is generated at the joint between the rubber 13 and the glass plate 14 and the inner surface of the outer case 12, and the outer case 12 is connected via the joint. Water can be prevented from entering from outside to inside.

As described above, according to the on-vehicle surveillance camera 11, by using the lens barrel 15 in which the lens barrel main body 15d and the plates 15b and 15c are integrated, FIG.
It is not necessary to use two plates 5 and 8 unlike the conventional in-vehicle surveillance camera 1 shown in FIG. 1 and the number of parts can be reduced, the structure can be simplified and the size can be reduced, and the workability can be improved. Further, according to the on-vehicle monitoring camera 11, the entire ring-shaped portion where the glass plate 14 and the rubber 13 overlap is pressed by the convex portion 15 of the lens barrel 15,
There is no need to provide a pressing margin for engaging the plate 5 as shown in FIG. 5 on the glass plate 4 and the rubber 3, so that the waterproof property can be improved and the size can be reduced.

[0013]

As described above, according to the lens holding device of the present invention, the number of parts can be reduced, the structure can be simplified, and the workability can be improved. Further, according to the lens holding device of the present invention, the waterproofness can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an on-vehicle surveillance camera according to an embodiment of the present invention.

FIG. 2 is a plan view of the lens barrel seen from the direction of arrow A shown in FIG.

FIG. 3 is a sectional view of the on-vehicle monitoring camera taken along a section line BB shown in FIG. 1;

FIG. 4 is a diagram for explaining an example of arrangement of a vehicle-mounted surveillance camera;

FIG. 5 is a cross-sectional view of a conventional in-vehicle monitoring camera.

[Explanation of symbols]

 1, 11: on-vehicle surveillance camera 2, 12, outer case 12b, 12c: support 3, 13, rubber 4, 14: glass plate 5, 8, ... plate 9, 15: Lens barrel 15a: Convex part 17: Lens

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G03B 17/08 H04N 5/225

Claims (3)

(57) [Claims] 1. A lens gripping device for gripping the lens of a camera for imaging the outside of the case through the transparent plate an opening covered from inside of the case of the case, mounting the vicinity of the outer peripheral portion of the transparent plate Waterproof with concave recess
An elastic member and a convex portion located along the concave portion, and the lens inside.
Integrated with the stored main body using the same members as the main body
A part formed with a structure and having a transparent plate of the elastic member attached thereto
Is pressed toward the transparent plate by the convex portion of the main body.
So that the joint is detachably fixed to the case.
A lens holding device having a hand portion and a lens storage means . 2. A case having an opening, and from the inside of the case so as to cover the opening of the case.
Waterproof provided with a transparent plate provided and a concave portion for mounting near the outer periphery of the transparent plate
An elastic member and a convex portion located along the concave portion, and the lens inside.
Integrated with the stored main body using the same members as the main body
A part formed with a structure and having a transparent plate of the elastic member attached thereto
Is pressed toward the transparent plate by the convex portion of the main body.
So that the joint is detachably fixed to the case.
A lens holding device having a hand portion and a lens storage means . 3. The elastic member surrounds the opening.
The lens holding device according to claim 1, wherein the lens holding device is located.