JPS59168404A - Lens movement operating device - Google Patents

Abstract

PURPOSE:To improve operability by providing a variable resistance means which varies in resistance value according to a depression position and a control means which controls the driving speed of a driving means according to the resistance value of this resistance means. CONSTITUTION:When an operation surface 24 is pressed at a position shown by an arrow 40, conductive rubber 23 contacts with a resistor 21 to conduct, and the resistance value between an electrode 25 provided at one terminal of the resistor 21 and an electrode 26 provided at one terminal of the conductive rubber 23 is determined and detected by a control circuit 27. The control circuit 27 applies a voltage corresponding to the resistance value to a motor 28 to rotate a gear 30 united with the rotating shaft 29 of the motor 28 clockwise, and a lens moving frame 31 moves as shown by an arrow 35 under the guidance of a guide pole 33 to perform power varying operation. Further, when the operation surface 24 is pressed at a position shown by an arrow 41, the lens frame 31 is moved in the direction opposite to that when the position shown by the arrow 40 is pressed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention: Industry A (The invention relates to a lens moving operation device that can be used in a video camera.

Structure of the conventional example and the period therebetween: point d In recent years, there has been a demand for a lens moving operation device that can make video cameras smaller and lighter and that can change the zoom speed of a variable magnification lens with easy operation.

With reference to the drawings below, the conventional lens movement operation device Q
I will explain about it. FIG. 1 is a configuration diagram of a conventional lens movement operation device, in which a gear 2 provided integrally with a scene switch 1 rotates from a rotation direction 1114i3 to an intermediate point L. The gear 2 is fixed to the upper surface of the operation board 8, and is supported by the rotation shaft support plate 4. 7 and which presses one side of the scene switch 1. The rotation speed of gear 2 changes, causing gear 7 to rotate, and at the same time, the resistance value of volume 6 changes.Control circuit 9 controls the voltage applied to the motor 10 as shown in the third section according to the resistance value of the volume 6, and controls the rotation speed and rotation direction of the motor 100. A lens moving frame 13 in which a variable magnification lens 16 is incorporated. of"
The ridge 14 provided on the second part is connected to the rotating shaft 11 of the motor 10.
The lens movement frame 13 meshes with a gear 12 press-fitted into the guide pole 16 as the gear 12 rotates.
Move in the forward and reverse directions of arrow 17 using as a guide. Also,
When you stop pressing seesaw switch 1 and open it ~
An equilibrium state is maintained by a compression spring 5 fixed between the lower surface of the sheet switch 1 and the upper surface of the operating board 8.

The operation of the conventional lens movement operation device configured as described above will be described below. By pressing the scene switch 1 from the arrow 18 side, the gear 2 rotates counterclockwise, and the gear 7, which is press-fitted onto the rotating shaft of the volume 6 meshing with the gear 2, rotates clockwise. As the gear Y rotates, the resistance value of the volume 6 increases, and when a voltage is applied to the motor 10 by the control circuit 9, the gear 12 rotates counterclockwise through the rotating shaft 11, and the rack 14 meshing with the gear 12 rotates. The lens moving frame 13 moves in the opposite direction to the arrow 17. Also, arrow 1 of seesaw switch 1. , by pressing the e side, the lens moving frame 13 moves in the opposite direction to that described above. In addition, Figure 2,
Point A in FIG. 3 indicates the equilibrium position of the scene switch 1.

However, with the above configuration, when reducing size and weight, the structure of the lens movement operation device is complicated, the number of parts increases, the volume occupied by the operation section becomes large, and the rotation stroke of the seesaw switch becomes difficult. The method of adjusting the lens moving speed has the problem that delicate speed adjustment is difficult.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a lens movement operation device that can reduce the weight of the IJS type lens movement operation device and change the zoom speed of a variable power lens with easy operation.

Structure of the Invention The lens movement operation device of the present invention includes a photographic lens that changes the magnification of one optical image of a subject by moving in the optical axis direction, a driving means that drives the photographic lens, and a resistance value that changes depending on the position to be pressed. and a control means that controls the drive speed of the drive means in accordance with the resistance value of the variable resistance means, thereby making it possible to reduce the size and weight of the lens moving operation device. In addition, if the zoom speed of the variable magnification lens can be determined from the operation panel by providing unevenness on the operation surface according to the amount of change in resistance value, it will be possible to change the zoom speed with a simple operation. It is something.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 4 shows the purchasing factors of the lens moving operation device in one embodiment of the present invention. In FIG. 4, a resistor 21 having the characteristics shown in FIG. There is a conductive rubber 23 having resilient properties, and an operation surface 24 having an uneven surface is adhered to the upper surface of the conductive rubber 23. An electrode 25 is provided at one end of the resistor 21, and an electrode 26 is provided at one end of the conductive rubber. As shown in FIG. 5, by pressing the operation UfrJ24 at the position of the arrow 40, the conductive rubber 23 curves and comes into contact with the resistor 21, and becomes energized and the resistance value between the electrodes 26 is determined. The control plate circuit 27 includes an electrode 25 and an electrode 26.
The voltage applied to the motor 28 is controlled as shown in FIG. 7 according to the resistance value of the motor 28, and the voltage is applied to the motor 28. Due to the voltage, the rotational direction and rotational speed of the motor 28 are fixed.The rotational direction and rotational speed of the motor 28 are fixed via a gear 30 that is press-fitted into the rotational shaft 29 of the monitor 28. is transmitted. Lens moving frame 31
holds the variable magnification lens 34, and the guide pole 33
It moves in the forward and reverse directions of arrow 35 while being guided by.

The operation of the lens moving L-manufacturing device of this embodiment constructed as described above will now be described. First, as shown in FIG. 5, by pressing the operation surface 24 at the position indicated by the arrow 40, the conductive rubber 23 comes into contact with the resistor 21 and becomes energized.

By being energized, the resistance value between the electrode 26 provided at one end of the resistor 21 and the electrode 26 provided at one end of the conductive rubber 23 is determined, and the resistance value is detected by the control circuit 27. .

The control circuit 27 applies a voltage to the motor 28 according to the resistance value, thereby rotating the pawl 30 press-fitted onto the rotating shaft 29 of the motor 28 in a clockwise direction.

As the pawl 30 rotates, the lens moving frame 31 is guided by the guide pole 33 and moves in the direction of the arrow 35 to perform a magnification change operation.

As shown in Figure 5, arrow 410, 1st cliff, operation surface 24
By pressing the operation surface 2 at the position of the arrow 40 mentioned above,
The lens movement frame 31 is moved in the opposite direction to the movement direction when pressing 4.
moves. Note that point B in FIGS. 6 and 7 indicates the center position of the resistor in the longitudinal direction.

As described above, according to this embodiment, the resistor 21 is printed on the operation board 20, and the conductive rubber 23 is printed through the insulating plate 22.
By providing an operating section having a concavo-convex portion corresponding to the amount of change in resistance value on the upper surface of the conductive rubber 23, it is possible to make the operating section thinner and lighter, and to install the operating section at any location. It becomes possible to make devices such as cameras, video cameras, etc. smaller and lighter. Furthermore, by providing the operation surface 24 with concavities and convexities, the zoom speed and direction can be selected depending on the position of the press, achieving improved operability compared to conventional lens movement operation devices.

In the above embodiment, the resilient conductive rubber 23 and the operation surface 24 are bonded together, but any material having the function of allowing the conductive member and the resistor to come into contact by pressing the operation surface may be used. Anything is fine. For example, a conductive member can be printed on the bottom of the operation surface.

Effects of the Invention As is clear from the above explanation, the present invention includes a photographic lens that changes the magnification of an optical image of a fracture object by moving in the optical axis direction, a driving means that drives the photographic lens, and a pressing position that changes the magnification of the photographic lens. It consists of a variable resistance means whose resistance value changes and a control means which controls the driving speed of the drive means according to the resistance value of the variable resistance means, which reduces the number of parts and improves the operability of the operating section. You can get that immersive effect. As a result, video cameras and the like can be made smaller and lighter, and an operation surface can be incorporated in any location, thereby reducing the cost of video cameras. Furthermore, by providing unevenness on the operation surface of the variable resistance means, the change mechanism of the resistance value can be determined based on the size of the unevenness, thereby improving the operability of zoom speed adjustment. .

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of a conventional lens movement operation device, Fig. 2 is a characteristic diagram of the rotation angle of the volume vs. resistance value, Fig. 3 is an output characteristic diagram of its control circuit, and Fig. 4 is a diagram of the one according to the present invention. A configuration diagram of the lens moving operation device in the example, FIG. 5 is a cross-sectional view showing the pressing state of the operation part, FIG. 6 is a characteristic diagram of the length-resistance value of the resistor, and FIG. 7 is the control circuit thereof. FIG. 21...Resistor, 23...Conductive rubber,
24...Operation surface, 2 Complete...Control circuit, 2
8... Motor, 34... Variable magnification lens. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Fig. 2 Fig. 3 Fig. 4 Fig. 4 Fig. 5 4I4ρ Fig. 6 Fig. 7

Claims (1)

[Claims] (1) A photographic lens that changes the magnification of the optical image of the object by moving in the optical axis direction, a driving means for driving the photographic lens, and a variable resistance means whose resistance value changes depending on the extent to which it is suppressed. and a means for controlling the drive speed of the drive means according to the resistance value of the variable resistance means. 2. The lens moving operation device according to claim 1, wherein the number of changes in resistance value can be determined by touch based on the thickness of the unevenness.