JPH01138226U

JPH01138226U -

Info

Publication number: JPH01138226U
Application number: JP3137988U
Authority: JP
Priority date: 1988-03-08
Filing date: 1988-03-08
Publication date: 1989-09-21

Description

[Brief explanation of drawings]

第１図〜第８Ｃ図は本考案の実施例を示してい
る。第１図は回転ヘツド式テーププレーヤのモー
ド切換装置を示す主要部分の平面図、第２図は上
記回転ヘツド式テーププレーヤのモード切換装置
に使用されている間欠ギヤを用いた動力伝達装置
の平面図、第３図は第２図の分解斜視図、第４Ａ
図は間欠ギヤの平面図、第４Ｂ図は間欠ギヤの裏
面図、第５Ａ図〜第５Ｃ図は間欠ギヤの回転動作
を各モードごとに示した平面図、第６図は補助ギ
ヤの動作を示す部分平面図、第７Ａ図と第７Ｂ図
は間欠ギヤの回転動作中におけるピンチローラの
切換動作をモード別に示す部分平面図、第８Ａ図
〜第８Ｃ図はシヤーシの裏側に設けられたモータ
動力の伝達部をシヤーシを透視してモード別に示
した平面図、第９図ならびに第１０Ａ図、第１０
Ｂ図は従来の間欠ギヤを使用した動力伝達装置を
示す平面図である。１０……シヤーシ、１１……回転ヘツド装置、
１２，１３……テープローデイング部材、１６…
…キヤプスタン、１７，１８……リールギヤ、２
０……動力伝達装置、２１……間欠ギヤ、２１ａ
……歯、２１ｂ，２１ｃ……歯の欠損部、２４，
２５……補助ギヤ、２４ａ，２５ａ……補助ギヤ
の歯、３３……補助ギヤを移動させるプツシヤ、
３４，３５……プツシヤを駆動する駆動レバー、
３６……駆動レバーを動作させる吸着レバー、３
８……吸着マグネツト、４１……ピンチローラ切
換カム、Ｃ……ピンチローラ切換カムのカム溝、
４５……ピンチローラ、４６，４８……ピンチロ
ーラアーム、４９……ピンチローラアームに設け
られたピン、４２……ギヤ切換カム、Ｄ，Ｅ，Ｆ
……ギヤ切換カムの駆動部、Ｍ……モータ、５５
……プレイギヤ、５６……Ｆ／Ｒギヤ、６６……
切換ピン、６５……切換レバー、６１……基本ギ
ヤ、７１……上部基本ギヤ、７２……リールギヤ
に噛み合うアイドルギヤ。 1 to 8C show embodiments of the present invention. Fig. 1 is a plan view of the main parts of the mode switching device of a rotary head tape player, and Fig. 2 is a plan view of a power transmission device using an intermittent gear used in the mode switching device of the rotary head tape player. Figure 3 is an exploded perspective view of Figure 2, and Figure 4A is an exploded perspective view of Figure 2.
The figure is a plan view of the intermittent gear, Figure 4B is a back view of the intermittent gear, Figures 5A to 5C are plan views showing the rotational operation of the intermittent gear in each mode, and Figure 6 is the operation of the auxiliary gear. FIGS. 7A and 7B are partial plan views showing the switching operation of the pinch roller by mode during the rotation operation of the intermittent gear, and FIGS. 8A to 8C are the motor power provided on the back side of the chassis. 9, 10A and 10 are plan views showing the transmission part of the transmission unit according to mode when looking through the chassis.
Figure B is a plan view showing a power transmission device using a conventional intermittent gear. 10... Chassis, 11... Rotating head device,
12, 13... tape loading member, 16...
... Capstan, 17, 18 ... Reel gear, 2
0... Power transmission device, 21... Intermittent gear, 21a
...Teeth, 21b, 21c...Tooth loss, 24,
25... Auxiliary gear, 24a, 25a... Teeth of the auxiliary gear, 33... Pusher for moving the auxiliary gear,
34, 35... Drive lever that drives the pusher,
36...Adsorption lever that operates the drive lever, 3
8... Adsorption magnet, 41... Pinch roller switching cam, C... Cam groove of pinch roller switching cam,
45... Pinch roller, 46, 48... Pinch roller arm, 49... Pin provided on the pinch roller arm, 42... Gear switching cam, D, E, F
... Drive unit of gear switching cam, M ... Motor, 55
...Play gear, 56...F/R gear, 66...
Switching pin, 65... Switching lever, 61... Basic gear, 71... Upper basic gear, 72... Idle gear that meshes with the reel gear.

Claims

[Claims for Utility Model Registration] 1. An intermittent gear that is provided with teeth around its periphery and has a portion where the teeth are missing, and a drive that is located in a position that meshes with the intermittent gear and is driven by a motor. The power transmission device is provided with a gear, and the intermittent gear is provided with a cam for transmitting power to another mechanism, and the intermittent gear has teeth to compensate for the missing teeth. This method uses an intermittent gear that is provided with an auxiliary gear that moves between a position that compensates for a missing tooth and a position that escapes from the missing tooth, and a switching mechanism that moves this auxiliary gear. Power transmission device. 2. A power transmission device using an intermittent gear according to claim 1 is used, and the intermittent gear is driven by rotation of the drive gear in both forward and reverse directions, and the intermittent gear has a pinch roller connected to the capstan. A pinch roller switching cam for separating the rollers and a gear switching cam are provided, and a gear group driven by the gear switching cam to transmit power from the drive gear to either of the pair of reel gears is provided. A mode switching device for a tape player, comprising a switching member for selectively switching gear engagement.