CN100410802C - camera focus mechanism - Google Patents

Abstract

The invention belongs to the field of optical technology and relates to the design of an optical camera focusing mechanism. Motor (1), motor bracket (2), screw rod (3), screw nut (4), mirror base (5), outer frame (6), elastic plate (7), lens (8), elastic baffle ( 9), the adjustment pad (10), which solves the problem in the background art that the camera uses a cam to adjust the focus, and it is difficult to process the cam curve. Because the present invention adopts the screw nut focusing method, the rotary motion of the motor shaft is converted into linear motion, and the mirror base is connected with the outer frame by using the elastic plate, so that the screw nut pushes the mirror base fixed with the lens to generate Shift to adjust the focus of the camera. The invention adopts the structure of the screw rod and the screw nut, the moving parts are easy to process, the cost is low, the elastic plate has no mechanical friction, no gap, high movement sensitivity, and can realize small displacement, so that the camera can adjust the focus correctly and ensure the camera optical system Imaging quality, so as to realize the focus adjustment of the camera.

Description

camera focus mechanism

Technical field:

The invention belongs to the field of optical technology and relates to the design of an optical camera focusing mechanism.

Background technique:

The camera's focusing mechanism adopts a cam curve combined with a flexible hinge focusing method. Although this focusing method has a simple structure and high precision, and the surface of the moving parts such as the cam has been specially treated to avoid stagnation and cold welding, and has good shock and vibration resistance, it has higher requirements for the processing of the cam curve.

Invention content:

In order to solve the problem in the background technology that the camera uses a cam to adjust the focus and it is difficult to process the cam curve, the purpose of the present invention is to adopt a mechanism in the camera that is simple in structure, easy to process, and low in cost, so that the camera can focus correctly, A camera focusing mechanism that ensures the imaging quality of the camera optical system.

The invention includes: motor, motor support, screw rod, screw nut, mirror base, outer frame, elastic plate, lens, elastic baffle plate, adjustment pad, backing plate, the extension shaft of the motor is connected with the screw rod, and the lens is placed on the mirror In the base, press the lens into the mirror base; the rear reference plane of the mirror base and the rear reference plane of the outer frame are in the same plane, and the mirror base and the outer frame are connected by elastic plates, and the elastic plates are connected on both sides of the mirror base. Adjusting pads are added between them; the elastic baffle is connected with the mirror base, and the nut is connected to the mirror base; the motor bracket is connected with the outer frame; the screw rod is screwed into the nut.

Advantages of the present invention: Since the present invention adopts the screw rod and screw nut focusing method, the rotary motion of the motor shaft is converted into linear motion, and the mirror base and the outer frame are connected by an elastic plate, so that the screw rod screw nut is pushed and the lens is fixed The lens mounts together produce displacement and focus adjustment. The invention adopts the screw rod and the screw nut to make the structure simple, the moving parts are easy to process, and the cost is low. The elastic plate has no mechanical friction, no gap, high movement sensitivity, and can make the micro displacement, so as to realize the focus adjustment of the camera.

Description of drawings:

Fig. 1 is a connection diagram of the mirror base and the outer frame of the present invention.

Figure 2 is a diagram of an embodiment of the present invention.

Detailed ways:

Embodiments of the present invention are shown in Figure 1 and Figure 2: motor 1, motor bracket 2, screw mandrel 3, screw nut 4, mirror holder 5, outer frame 6, elastic plate 7, lens 8, elastic baffle 9, adjustment pad 10. Backing plate 11.

Motor 1 uses a stepping motor as the transmission source of the focusing mechanism. The motor bracket 2, the mirror base 5 and the outer frame 6 are made of aluminum alloy materials respectively. The screw mandrel 3 is made of 40Cr material. The silk mother 4 is made of QSn4-4-4 material. The elastic plate 7 and the elastic baffle 9 are respectively made of 65Mn material, the elastic plate 7 adopts a flexible hinge structure and is composed of 8 elastic plates, and the elastic baffle 9 is composed of 4 elastic baffles. The adjustment pad 10 is made of 2Cr13 material and consists of 8 adjustment pads. Backing plate 11 selects 45 steels for use as the auxiliary piece that mirror base 5 and outer frame 6 are connected.

As shown in Figure 1, clean up the mirror base 5 and the outer frame 6 and place them on the backing plate 11 respectively. The rear reference planes of the mirror base 5 and the outer frame 6 are coplanar. The elastic plate 7 connects the mirror base 5 and the outer frame 6, screw on the screws, take off the backing plate 11, connect the mirror base 5 and the other side of the outer frame 6 with the elastic plate 7, connect the mirror base 5 and the elastic plate Adjustment pads 10 will also be added between 7, and the screws will be screwed on. During the whole process, a torque wrench will be used to screw the screws, and the elastic plate 7 is not allowed to be displaced, so as to ensure that the mirror holder 5 and the outer frame 6 maintain the original state during the connection process.

The lens 8 is placed in the mirror holder 5, and the elastic baffle 9 is connected to the mirror holder 5 with screws so that the lens 8 is pressed into the mirror holder 5. Connect the screw nut 4 to the mirror base 5 with screws. Connect the cleaned motor bracket 2 with the outer frame 6 respectively, connect the extension shaft of the motor 1 with the screw mandrel 3, screw the screw mandrel 3 into the screw nut 4, and connect the motor 1 and the motor bracket 2 well. Use the adjustment pad 10 to adjust the optical axis of the lens, and after the relative position is adjusted, tighten the screw and place the pin.

Claims (1)

1. Camera focusing mechanism, including: motor (1), motor bracket (2), screw rod (3), motor (1) extending shaft and screw rod (3) connected, lens (8) placed on the mirror holder (5), compress the lens (8) in the mirror holder (5); it is characterized in that it also includes: screw nut (4), outer frame (6), elastic plate (7), elastic baffle (9) , the adjustment pad (10), the rear reference plane of the mirror base (5) and the rear reference plane of the outer frame (6) are coplanar, and the mirror base (5) and the outer frame (6) are connected by the elastic plate (7) , respectively add adjustment pads (10) between both sides of the mirror base (5) and the elastic plate (7); the elastic baffle (9) is connected with the mirror base (5), and the screw nut (4) is connected to the mirror on the seat (5); connect the motor support (2) with the outer frame (6); screw the screw mandrel (3) into the screw nut (4).

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