Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Eiji Nagasaki

Akio Konishi

Koichiro Hirabayashi

Keiji Sakamoto

Hideaki Yoshio

Hiroshi Kurumatani

Yoshitada Moriyasu

Tetsuki Asaoka

Takeshi Syuuke

Sigeo Ueda

Kenji Sasaki

Daisuke Ito

Fumio Shinano

Shinichi Iwasaki

Keishi Iwasaki

Shigeo Ueda

A lens barrel () comprises a drive frame () and a first lens frame (). The first lens frame () has first to third cam followers (to) that are respectively inserted into first to third outer cam grooves (to), and first and second auxiliary pins (and) disposed so as to be able to come into contact with first and second auxiliary grooves (and). When viewed in the Y axis direction, the first and second auxiliary pins (and) are disposed between the first to third cam followers (to) in the peripheral direction. The positions of the first and second auxiliary pins (and) are offset from the positions of the first to third cam followers (to) in the Y axis direction.

Lens barrel

To produce a subject's image on an imager as accurately as possible, a technique that is effectively applicable to the process of assembling an optical system is provided. An imaging device includes: an imager; a plate member, to which the imager is attached; and a holding member configured to hold the plate member. The plate member has a first portion, through which at least one fixing hole has been cut, and a second portion, to which the imager is attached and through which at least one adjusting hole has been cut. The plate member is held by the holding member using a number of fastening members to be introduced through the at least one fixing hole and the at least one adjusting hole. When the first portion is fixed on the holding member, the fastening member that is introduced through the at least one adjusting hole adjusts the relative position of the second portion to the holding member.

Imaging device

A tape guide post mechanism for guiding running of a tape includes: a post arm, the post arm including a tape guide post, around which the tape is looped at a predetermined angular distance, and which guides running of the tape, and a hole; an arm shaft which engages with the hole and rotatably supports the post arm, wherein an external side surface of the arm shaft is in contact with the hole at at least two points in the vicinity of an upper opening of the hole and at at least two points in the vicinity of a lower opening of the hole.

Tape guide post mechanism

A tape tension controlling mechanism of a magnetic recording/reproducing apparatus for controlling a tension of a magnetic tape includes: a reel bed; a reel bed drum; a tension post; a tension arm rotatably supported by a tension arm shaft; an urging element; a tension band having an engagement portion; and a band fixing screw having a threaded portion at one end thereof and a head portion at the other end, the band fixing screw further having, between the threaded portion and the head portion, an intermediate shaft portion for engagement with the engagement portion of the tension band, wherein a longitudinal center line of the intermediate shaft portion is shifted from the longitudinal center line of the threaded portion, and a pitch P of a thread of the threaded portion and a longitudinal length L of the intermediate shaft portion have a relationship of L&#x3e;P/2.

Tape tension controlling mechanism for magnetic recording/reproducing apparatus

A tape guide post mechanism for guiding running of a tape is provided. The tape guide post mechanism includes a post arm, the post arm including a tape guide post, around which the tape is looped, and which guides running of the tape, and a hole. The tape guide post mechanism further includes an arm shaft which engages with the hole and rotatably supports the post arm. The arm shaft has an elastic portion which presses a portion of the post arm. As a result a small sized, inexpensive tape guide post mechanism, which has a simple structure, in which the slant of each element is accurately controlled, and which achieves decreases in size and cost of the magnetic recording/reproducing apparatus, can be obtained.

A magnetic recording and reproducing apparatus which allows a reduction in the necessary space by attaching a rotary head cylinder unit (,) onto a chassis,through leaf springs (,) using set screws (,). The rotary head cylinder unit (,) can be fixed onto the chassis (,) with a certain load without causing distortion of the rotary head cylinder unit. Integration of two or more leaf springs (,) improves efficiency in assembling the apparatus and reduces the number of components.

Magnetic recording and reproducing apparatus with a rotary head cylinder unit supported with a predetermined pressure

A magnetic recording and reproducing apparatus enabling to optimal adjustment of the tilt of a capstan shaft against a chassis by means of a simple structure so as to realize stable tape transport. A housing (9) is fixed onto a chassis (6) by tightening a first fastening screw (14) and a second fastening screw (15). Then, the degree of rotation of an adjusting screw (16) is varied in order to accurately optimize the tilt of a capstan shaft (8).

Magnetic recording and reproducing apparatus and method for adjusting

The invention is concerned with a magnetic recording/playback apparatus in which a magnetic tape is pulled out from a tape cassette and wound around a cylindrical rotary head cylinder, having a rotary head built therein, over a predetermined angle to record/playback signals through the rotary head, and more particularly, with a tape guide post driving mechanism, a pinch roller pressing mechanism and a tension serve mechanism. Specifically, the invention provides a tape guide post driving device which can reduce the size, weight and thickness of the apparatus by ensuring a large angle of thickness of the apparatus by ensuring a large angle of rotation of a rotating member, which includes a tension arm, in a direct manner. Also, the invention realizes a pinch roller pressing mechanism in which a sufficient stroke can be obtained even when a cam gear is reduced in its diameter and can provide a sufficient stroke even with a small amount of rotation. Further, the invention prolongs the service life and achieves a remarkable reduction in both the number of parts used and the number of assembling steps by using a pad brake (brake member), instead of a band brake, for braking a rotating member and bringing the brake member into full contact over the former's entire surface with the member being braked.

Magnetic recording/playback apparatus having a leaf-type resilient

The invention is concerned with a magnetic recording/playback apparatus in which a magnetic tape is pulled out from a tape cassette and wound around a cylindrical rotary head cylinder, having a rotary head built therein, over a predetermined angle to record/playback signals through the rotary head, and more particularly, with a tape guide post driving mechanism, a pinch roller pressing mechanism and a tension servo mechanism. Specifically, the invention provides a tape guide post driving device which can reduce the size, weight and thickness of the apparatus by ensuring a large angle of rotation of a rotating member, which includes a tension arm, in a direct manner. Also, the invention realizes a pinch roller pressing mechanism in which a sufficient stroke can be obtained even when a cam gear is reduced in its diameter and can provide a sufficient stroke even with a small amount of rotation. Further, the invention prolongs the service life and achieves a remarkable reduction in both the number of parts used and the number of assembling steps by using a pad brake (brake member), instead of a band brake, for braking a rotating member and bringing the brake member into full contact over the former's entire surface with the member being braked.

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Osaka, Japan

Eiji Nagasaki