JPS6216942U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main parts of an embodiment of the main/sub lens moving device according to the present invention, and FIGS. 2 and 3 show the operation of the sub lens system 2 and the aperture member 22 in FIG. 1. FIGS. 4 and 5 are partial schematic front views for explaining the present invention, and FIGS. 4 and 5 are partial schematic plan views for explaining other embodiments of the moving configuration of the main lens system 1 in the main/sub lens system moving device according to the present invention. It is. 1...Main lens system, 2...Sub-lens system, 3...
Motor, 4... Gear train, 5... First cam, 6...
Second cam, 7...pressing member, 8, 11, 13, 1
6, 17, 18, 20...Spring, 9...Holding member, 10...Operation plate, 12...Sliding rod, 15...Drive lever, 17...Control lever, 19...Second control lever , 21... third control lever, 22...
...Aperture member, 23...Finder control lever, 2
4... Field of view frame.

Claims (1)

[Claims for Utility Model Registration] (1) The photographic optical system is composed of a main lens system and a sub-lens system, and the main lens system is moved back and forth along the photographic optical axis, and the sub-lens system is moved along the optical axis. Switch the focal length between two types by moving it in and out 2
A moving device for the main and sub lens systems of the focus camera, comprising a first spring and a second spring that urge the main and sub lens systems to move in predetermined directions, respectively;
A motor that rotates in forward and reverse directions and serves as a drive source, a gear train consisting of a plurality of gears to which the rotational force of the motor is transmitted and rotates in forward and reverse directions in a predetermined relationship, and a gear part that engages with an arbitrary gear in the gear train. a first cam and a second cam, each having a cam surface that rotates forward and backward in response to the forward and reverse rotation of the motor and whose distance from the rotation axis is controlled; a first converting means for converting the rotational motion of the second cam into linear motion and transmitting the linear motion force to the main lens system against the biasing force of the first spring; at least a second converting means for transmitting the biasing force of the second spring to the secondary lens system, the driving force of the motor is transmitted through the cam surfaces of the first cam and the second cam, respectively. A moving device for main and sub lens systems in a bifocal camera, characterized in that the device transmits information to the main lens system and the sub lens system. (2) The first converting means has a protrusion that comes into contact with the cam surface of the first cam, and is biased about an arbitrary axis so that the protrusion always comes into contact with the cam surface, and about the arbitrary axis. A pressing member that can be rotated in forward and reverse directions, a sliding rod provided parallel to the photographing optical axis, a position regulating portion through which the sliding rod is inserted, and a pressing force due to rotation of the pressing member is transmitted via a third spring. and a holding member that holds the main lens system and is always biased backward along the photographing optical axis by a first spring. A device for moving the main and sub lens systems in a bifocal camera. (3) The second converting means has a protrusion that comes into contact with the cam surface of the second cam, and is biased about the arbitrary axis so that the protrusion always comes into contact with the cam surface, and about the arbitrary axis. It has a drive lever that can be rotated in forward and reverse directions, and a blocking member that is movably connected to the drive lever at one end and prevents movement based on the biasing force of the second spring of the sub lens system at the other end. A device for moving main and sub lens systems in a bifocal camera according to claim 1, which is a registered utility model and includes at least a control lever for converting motion into motion. (4) The second converting means has a protrusion that comes into contact with the cam surface of the second cam, and is biased about an arbitrary axis so that the protrusion always comes into contact with the cam surface, and about the arbitrary axis. A drive lever that can rotate in forward and reverse directions, and a blocking member that is movably connected to the drive lever at one end and prevents movement based on the biasing force of a second spring of the sub lens system at the other end, and prevents rotational movement of the drive lever. a control lever that converts the motion into a wired motion; a second control lever that rotates in conjunction with the drive lever and has an end that abuts a second protrusion provided on the drive lever; The lens has an end movably connected to the main lens system, and is moved linearly by rotation of the control lever, and the other end is normally positioned on the photographing optical axis and is biased to set an aperture corresponding to the main lens system. a third control lever connected to the diaphragm member, and the third control lever controls the movement of the sub lens system onto the photographing optical axis by the drive lever. 2. A device for moving main and sub lens systems in a bifocal camera according to claim 1, characterized in that a diaphragm member is retracted from above the optical axis.