JP3017266U - Lens focus adjustment structure for camera-equipped front cordless handset - Google Patents

Abstract

(57) [Summary] [Structure] A plurality of recesses 31, 31 are provided in an outer peripheral portion 30 to which a lens 2 used for image pickup of a camera-equipped front door subunit 1 is fixed.
Are provided on the outer peripheral portion 50, the lens frame receiver 4 into which the lens frame is fitted, and the plurality of convex portions 51, 51 that are locked in the plurality of concave portions are provided on the outer peripheral portion 50. A lens frame rotator 5 for rotating the lens frame inside to adjust the focus and a stopper 6 for fixing the lens frame after focus adjustment to the lens frame receiver are provided. [Effect] By engaging the convex portion of the lens frame rotating tool with the concave portion of the lens frame and then rotating the lens frame rotating tool, the lens frame rotates reliably following the rotation of the lens frame rotating tool, and the focus Adjustment accuracy is significantly improved. Further, the lens frame is not displaced due to the screwing force of the screw.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lens focus adjusting structure for a camera-equipped front subunit, and more particularly to a lens focus adjusting structure for a camera-equipped front subunit having an improved lens frame and lens frame rotating tool.

[0002]

[Prior art]

 As shown in FIG. 3A, in a conventional door intercom with a camera of an intercom, a lens 2 used for imaging is fixed to a lens frame 39, and this lens frame 39 is fitted to a lens frame receiver 49. , After the focus adjustment, it is fixed with the screw 6.

A lens frame rotating tool 59 for rotating the lens frame 39 is used for adjusting the initial focus of the lens 2 after installing the camera-equipped front subunit. As shown in FIG. 3B, a ring-shaped pressure contact rubber 58 is fitted to the lens frame rotating tool 59 on the side where the lens frame 39 is in contact. The operation of such a conventional lens focus adjustment structure of the entrance cordless handset with a camera is as follows.

As shown in FIG. 3C, at the time of adjusting the initial focus of the lens 2, the ring-shaped pressure contact rubber 58 of the lens frame rotation tool 59 is brought into contact with the lens frame 39 and pressed to rotate the lens frame. Rotate the tool 59. Due to the frictional force at the contact portion 9 between the lens frame 39 and the pressure contact rubber 58, the lens frame 39 rotates following the rotation of the lens frame rotating tool 59. When the desired focal point is reached, the lens frame 39 is fastened and fixed to the lens frame receiver 49 with the screw 6 screwed from the outside of the lens frame receiver 49. The lens 2 fixed to the lens frame 39 can accurately capture an image of a visitor or the like.

[0005]

[Problems to be solved by the device]

 The conventional lens focus adjusting structure of the camera-equipped front door subunit rotates the lens frame 39 following the rotation of the lens frame rotating tool 59 by the frictional force at the contact portion 9 between the lens frame 39 and the pressure contact rubber 58. Since the lens focus adjustment is performed by urging the lens frame 39 to move, if the axial diameter of the lens frame 39 is almost equal to the inner diameter of the lens frame receiver 49, the lens frame 39 slips without rotating and the focal point of the lens 2 There was a drawback that adjustment would not be possible.

Further, even if the lens frame 39 is rotated, a slight slip occurs at the contact portion 9 between the lens frame 39 and the pressure contact rubber 58, and the rotation transmission accuracy of the lens frame rotation tool 59 is poor. Further, when the lens frame 39 is fixed by the screw 6 after the focus adjustment, the screwing force of the screw 6 is stronger than the pressure contact force of the pressure contact rubber 58, the lens frame 39 is slightly moved and fixed, and defocus occurs. There was also.

[0007]

【Purpose】

 The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a lens focus adjusting structure for a front door subunit with a camera capable of surely adjusting the lens focus by a lens frame rotating tool. .

[0008]

[Means for Solving the Problems]

 The lens focus adjustment structure of the camera-equipped front cordless handset according to the present invention is such that the lens frame used for imaging the camera-equipped front cordless handset is fixed, and the lens frame is fitted to the lens frame provided with a plurality of recesses on the outer periphery. Lens frame receiver and a plurality of convex parts that are locked to a plurality of concave parts are provided on the outer peripheral part to rotate the lens frame in the lens frame receiver to adjust the focus and a lens frame rotating tool. It is provided with a stopper for fixing the rear lens frame to the lens frame receiver.

[0009]

[Function] The lens frame is fixed to the lens and has a plurality of recesses on the outer periphery, the lens frame receiver into which the lens frame is fitted, and the plurality of protrusions that are locked in the plurality of recesses are provided on the outer periphery. It is equipped with a lens frame rotating tool that adjusts the focus by rotating the lens frame inside the lens frame receiver and a stopper that fixes the lens frame to the lens frame receiver after focus adjustment. By rotating the lens frame rotator by locking the convex portion of the lens frame rotator, the lens frame reliably rotates following the rotation of the lens frame rotator, and the focus adjustment accuracy is significantly improved.

[0010]

【Example】

 Hereinafter, an embodiment of a lens focus adjusting structure of a camera-equipped entrance cordless handset according to the present invention will be described in detail with reference to the drawings. As shown in FIG. 1 (c), in the intercom camera-equipped front door subunit which is connected to the camera-mounted front subunit 1 and the indoor master unit 8, the lens 2 used for imaging as shown in FIG. 1 (a). Is fixed to a lens frame 3, and this lens frame 3 is fitted into a lens frame receiver 4 and, after focus adjustment, is fixed with a screw 6 as a stopper.

A lens frame rotating tool (FIG. 1 (b)) 5 for rotating the lens frame 3 is used for adjusting the initial focus of the lens 2 after the front door subunit with camera 1 is installed at a desired position. . The lens focus adjustment structure of the camera-equipped front cordless handset 1 according to the present invention includes a lens frame 3 to which a lens 2 used for image pickup of the camera-equipped front cordless handset 1 is fixed, and a lens frame 3 into which the lens frame 3 is fitted. It comprises a receiver 4, a lens frame rotator 5 for adjusting the focus by rotating the lens frame 3 inside the lens frame receiver 4, and a screw 6 for fixing the lens frame 3 after the focus adjustment to the lens frame receiver 4.

As shown in FIG. 1A, the outer peripheral portion 30 of the lens frame 3 that is in contact with the lens frame rotating tool 5 is provided with four concave portions 31 at equal intervals, and the lens frame As shown in FIG. 1B, four convex portions 51 are provided on the outer peripheral portion 50 of the rotary tool 5 on the side abutting the lens frame 3. As shown in FIG. 2, when adjusting the initial focus of the lens 2, the four convex portions 51 of the lens frame rotating tool 5 are brought into contact with the four concave portions 31 formed in the outer peripheral portion 30 of the lens frame 3. , Lock it. Then, the lens frame rotating tool 5 is rotated. Between the lens frame 3 and the lens frame rotator 5, since the convex portion 51 of the lens frame rotator 5 is locked in the concave portion 31 of the lens frame 3, the lens frame rotator 5 can be accurately attached to the lens frame rotator 5. Following this, the lens frame 3 rotates. When the desired focal point is reached, the screw 6 is screwed from the outside of the lens frame receiver 4 to fix the lens frame 3 to the lens frame receiver 4. Also at this time, since the convex portion 51 of the lens frame rotating tool 5 is locked in the concave portion 31 of the lens frame 3, when the axial diameter of the lens frame 3 is almost equal to the inner diameter of the lens frame receiver 4. Also, the focus of the lens 2 can be adjusted, defocusing due to the screwing force of the screw 6 does not occur, and the lens 2 fixed to the lens frame 3 accurately captures an image of a visitor or the like, and the main unit 8 ( A clear image can be confirmed in FIG.

In the above embodiment, four concave portions 31 of the frame 3 and four convex portions 51 of the lens frame rotating tool 5 are provided at equal intervals, but the rotational force of the lens lens frame rotating tool 5 can be transmitted with good balance. As described above, the number and shape are not limited to those in the embodiment as long as a plurality of them are provided.

[0014]

[Effect of device]

 As is clear from the above embodiments, the lens frame used for imaging the entrance device with a camera is fixed, and the lens frame provided with a plurality of recesses on the outer periphery and the lens frame to which the lens frame is fitted. The lens holder and the lens frame rotator that adjusts the focus by rotating the lens frame inside the lens frame receiver by providing a plurality of convex parts on the outer periphery that are locked to the plurality of concave parts Since the lens frame holder is provided with a stopper to fix it, the lens frame can be rotated by locking the convex part of the lens frame rotating tool to the concave part of the lens frame and then rotating the lens frame rotating tool. If the lens frame shaft diameter is almost equal to the inner diameter of the lens frame receiver, it will follow the rotation of the tool reliably and the focus adjustment accuracy will improve remarkably. Also, it is possible to focus adjustment of the lens 2.

Further, since the lens frame is screwed in the state where the convex portion of the lens frame rotating tool and the concave portion of the lens frame are engaged with each other, the displacement of the lens frame due to the screwing force of the screw does not occur.

[Brief description of drawings]

1A and 1B are views for explaining a lens focus adjustment structure of a camera-equipped entrance cordless handset according to the present invention, wherein FIG. 1A is an explanatory view of a lens frame, FIG. 1B is an explanatory view of a lens frame rotating tool, and FIG. It is an installation condition explanatory drawing of a front door subunit.

FIG. 2 is a view for explaining the operation of the lens focus adjustment structure of the camera-equipped entrance cordless handset according to the present invention.

FIG. 3 is a diagram illustrating a lens focus adjustment structure of a conventional camera-equipped front cordless handset, in which (a) is an explanatory diagram of a lens frame;
(B) is explanatory drawing of a lens frame rotation tool, (c) is operation | movement explanatory drawing.

[Explanation of symbols]

 1 ... Entrance device with camera 2 ... Lens 3 ... Lens frame 30 ... Lens frame outer periphery 31 ... Lens frame recess 4 ... Lens frame receiver 5 ... Lens frame rotating tool 50 ... Lens frame rotating tool outer periphery 51 ... Lens Convex portion of frame rotating tool 6 ... Stopper

Claims (1)

[Scope of utility model registration request] 1. A lens frame (3) having a plurality of recesses (31, 31, ...) In its outer peripheral portion (30), to which a lens (2) used for image pickup of a camera-equipped entrance cordless handset (1) is fixed. )
A lens frame receiver (4) into which the lens frame is fitted, and a plurality of convex portions (51, 5) locked in the plurality of concave portions.
1, ...) are provided on the outer peripheral portion (50) to rotate the lens frame in the lens frame receiver to adjust the focus, and after the focus adjustment, the lens frame is used as the lens frame receiver. A lens focus adjusting structure for a front door subunit with a camera, comprising a stopper (6) for fixing.