Abstract: In the sheet feeder, a first intermediate gear support shaft is inserted into a bearing of a first intermediate gear, and contains a bearing engaging part including a sectional shape having a substantial D-shaped cut having a flat part and a circular part. The bearing engaging part having a substantial D-shaped cut of the first intermediate gear support shaft contains two support parts and located on the boundary line between the flat part and the circular part. The support parts are arranged so as to support the circular bearing of the first intermediate gear at two positions sloping by a predetermined angle right and left for the line of a force which passes the center of the first intermediate gear and is applied to the first intermediate gear from the rotation. The support parts have a chamfered or rounded shape.

Abstract: In a piezoelectric resonator, the temperature coefficient &egr;TC of the capacitance of the piezoelectric material, the bandwidth ratio &Dgr;f/fo, the temperature coefficient FrTC of the resonance frequency, the temperature coefficient FaTC of the anti-resonance frequency, and a target value &agr; for the temperature coefficient of the center frequency satisfy the following expression: |(FrTC+FaTC)/2+K×&egr;TC×(&Dgr;f/fo)|≦&agr; where K=a coefficient determined according to the impedance at the midpoint between Fr and Fa; &egr;TC=A×(the amount of change in capacitance in a measured temperature range)/(the capacitance at a reference temperature×the measured temperature range); &Dgr;f/fo=(Fa at the reference temperature−Fr at the reference temperature)/(fo at the reference temperature); FrTC=A×(the amount of change in Fr in the measured temperature range)/(Fr at the reference temperature×the measured temperature r

Abstract: A cassette table which is moved in a cassette traveling path has a support plate which is configured by a metal plate having elasticity, side walls, and cassette pressers. A magnetic tape device has swing levers which press down projections disposed on the side walls to lower the cassette table, and seats on which the tape cassette placed on the support plate is to sit. Swinging operation of the swing levers in a stage after the tape cassette sits on the seats is allowed by flexural deformation of the support plate.

Abstract: A pair of float prevention members 4f are formed at the upper ends of side plates 4b of a moving table 4 to engage the upper edge of a tape cassette T. A pair of integrally formed gripping members 4e are projected inward at the corners between the float prevention members 4f and the side plates 4b, and are brought into contact with the side faces of the tape cassette T when it is inserted in to the moving table 4. A bottom plate 4a of the moving table 4 is flexible steel. When the bottom plate 4a is flexed by inserting the tape cassette T between the gripping members 4e, due to the urging force thus generated, the gripping members 4e are flexibly brought into contact with the side faces of the tape cassette T.

Abstract: Guide plates 3a and 3b are formed integrally with a chassis 2 by bending a steel plate substantially into a U shape. Swinging levers 8 are disposed inside the guide plates 3a and 3b, and pivotal attachment shafts 7 provided on the outside surfaces of the swinging levers 8 are inserted in pivotal attachment holes 37 formed through the guide plates 3a and 3b. A coupling shaft 36 is disposed between the swinging levers 8 so as to be concentric with the pivotal attachment shafts 7, and the ends 36a of the coupling shaft 36 bent substantially in an L shape are engaged with concave portions 34a formed on the inside surfaces of the swinging levers 8, thereby integrally coupling the swinging levers 8 through the coupling shaft 36. Disengagement preventing parts 35 engaging with the ends 36a of the coupling shaft 36 engaged with the concave portions 34a are integrally formed on the swinging levers 8.

Abstract: In a magnetic tape device, a tape cassette moving table 4 is placed between a pair of right and left guide plates 3a and 3b so as to be movable forward and backward (a and b). Rocking levers 8 which are engaged with the moving table 4, and a rotating cam 9 which is forward and reversely rotated by a driving source are interlockingly connected to each other via a slide plate 26. The rocking levers 8 are swung forward and backward (c and d) by the driving source via the rotating cam 9 and the slide plate 26 to move the moving table 4 forward and backward (a and b) between a cassette inserting position A and a cassette placing position B.

Abstract: An FM detector circuit includes a bridge circuit having four sections with a discriminator connected as one of the four sections. An FM intermediate frequency is applied across one pair of diagonally opposed nodes of the bridge circuit and an output is picked up across the other pair of diagonally opposed nodes of the bridge circuit. The discriminator includes a piezoelectric material that is selected to produce stable overall temperature characteristics.

Abstract: A method for manufacturing a piezoelectric device includes the steps of providing a piezoelectric substrate having a piezoelectric driving unit and laminating outer coating substrates on major surfaces thereof via adhesive layers. Each of the adhesive layers includes a first layer of an adhesive having a Shore D hardness after curing of not more than approximately 60 and disposed so as not to be exposed in a region of lateral side surfaces of the layered body provided with the external electrodes, second and third layers of an adhesive having a Shore D hardness of at least approximately 60, and the third layer of having a viscosity before curing of at least approximately 3.0×105 mPas at a temperature of 25° C. The third layer is disposed between the periphery of the first layer and the region of the lateral side surfaces of the layered body provided with the external electrodes.

Abstract: An idler mechanism for a magnetic tape device. An idler gear is swingingly displaced between first and second positions to selectively transmit rotation to one of a pair of reels. One end of an arm-like swinging member is coupled in a relatively rotatable manner to a center shaft of an input gear which always meshes with the idler gear and which is rotated forwardly and reversely. A shaft which is disposed on the other end of the swinging member is inserted in a relatively rotatable manner into a bearing hole of the idler gear. A surface of a flange which is disposed on the input gear is formed as a friction force applying face which extends radially outwardly so as to be inclined downwardly. An outer peripheral portion of the idler gear slidably comes into contact with the friction force applying face.

Abstract: A magnetic tape apparatus has an intermediate gear 19 meshed with an idler gear 22 which is releasably meshed with both a pay-off reel table 2 and a roll-up reel table 3, a drive gear 31 rotatably driven by a capstan motor 10, a driven gear 32 releasably meshed with the drive gear 31 by way of a friction plate, a clutch mechanism 20, and a speed increasing mechanism 27. The speed increasing mechanism 27 has a movable rotary body 37 rotatably mounted around a support shaft 36 and adapted to reciprocate along an axis of the support shaft 36 by means of the clutch mechanism 20. The movable rotary body 37 is provided with a small diametered gear 38 and a large diametered gear 39. In a fast feed mode and a rewind mode, the small diametered gear 38 is meshed with the drive gear 31 while the large diametered gear 39 is meshed with the intermediate gear 19.

Abstract: A magnetic tape apparatus has an intermediate gear (19) meshed with an idler gear (22) which is releasably meshed with both a pay-off reel table (2) and a roll-up reel table (3), a drive gear (31) rotatably driven by a capstan motor (10), a driven gear (32) releasably meshed with the drive gear (31) by way of a friction plate, a clutch mechanism (20), and a speed increasing mechanism (27). The speed increasing mechanism (27) has a movable rotary body (37) rotatably mounted around a support shaft (36) and adapted to reciprocate along an axis of the support shaft (36) by means of the clutch mechanism (20). The movable rotary body (37) is provided with a small diametered gear (38) and a large diametered gear (39). In a fast feed mode and a rewind mode, the small diametered gear (38) is meshed with the drive gear (31) while the large diametered gear (39) is meshed with the intermediate gear (19).

Abstract: A cassette table which is moved in a cassette traveling path has a support plate which is configured by a metal plate having elasticity, side walls, and cassette pressers. A magnetic tape device has swing levers which press down projections disposed on the side walls to lower the cassette table, and seats on which the tape cassette placed on the support plate is to sit. Swinging operation of the swing levers in a stage after the tape cassette sits on the seats is allowed by flexural deformation of the support plate.

Abstract: A rotary magnetic head device includes a stationary drum; a rotary drum having a rotary magnetic head; a rotor of a motor fixed to the rotary drum; a support shaft for pivotally supporting the rotary drum, the support shaft having a receiving face; a radial bearing for receiving a radial load, interposed between the rotary drum and the support shaft; a thrust bearing for receiving a thrust load, being slidably put on the receiving face; an urging member for urging the thrust bearing against the receiving face by pushing the rotary drum downward; and a reverse L-shaped support fixed to the stationary drum. The urging member is supported by the reverse L-shaped support and arranged on the rotary drum.

Abstract: In a piezoelectric resonator, the temperature coefficient &egr;TC of the capacitance of the piezoelectric material, the bandwidth ratio &Dgr;f/fo, the temperature coefficient FrTC of the resonance frequency, the temperature coefficient FaTC of the anti-resonance frequency, and a target value a for the temperature coefficient of the center frequency satisfy the following expression:

Abstract: A pair of float prevention members 4f are formed at the upper ends of side plates 4b of a moving table 4 to engage the upper edge of a tape cassette T. A pair of integrally formed gripping members 4e are projected inward at the corners between the float prevention members 4f and the side plates 4b, and are brought into contact with the side faces of the tape cassette T when it is inserted in to the moving table 4. A bottom plate 4a of the moving table 4 is flexible steel. When the bottom plate 4a is flexed by inserting the tape cassette T between the gripping members 4e, due to the urging force thus generated, the gripping members 4e are flexibly brought into contact with the side faces of the tape cassette T.

Abstract: Guide plates 3a and 3b are formed integrally with a chassis 2 by bending a steel plate substantially into a U shape. Swinging levers 8 are disposed inside the guide plates 3a and 3b, and pivotal attachment shafts 7 provided on the outside surfaces of the swinging levers 8 are inserted in pivotal attachment holes 37 formed through the guide plates 3a and 3b. A coupling shaft 36 is disposed between the swinging levers 8 so as to be concentric with the pivotal attachment shafts 7, and the ends 36a of the coupling shaft 36 bent substantially in an L shape are engaged with concave portions 34a formed on the inside surfaces of the swinging levers 8, thereby integrally coupling the swinging levers 8 through the coupling shaft 36. Disengagement preventing parts 35 engaging with the ends 36a of the coupling shaft 36 engaged with the concave portions 34a are integrally formed on the swinging levers 8.

Abstract: A low-cost piezoelectric component which is efficiently manufactured and which provides excellent electrical characteristics, includes a piezoelectric element, a damping member, a supporting substrate for mounting the piezoelectric element, and a cover member. On a surface of the piezoelectric element, the damping member has a predetermined hardness and a vibrating electrode. In the case of a piezoelectric trap filter, a damping member is provided which has a Shore hardness of about 35 to about 80. In the case of a piezoelectric discriminator, the damping member has a Shore hardness of about 80 to about 100.

Abstract: A magnetic tape apparatus including a cradle movably disposed on a chassis and used for supporting a tape cassette, and a cassette loading mechanism for interlocking the cradle with a driving unit via a moving rod which is reciprocated by the driving unit. The cradle is slightly moved backward when the cradle in a forward standby state is loaded with the tape cassette and by moving the moving rod forward using the driving unit upon detection of the slight backward movement of the cradle, and the cradle is moved backward horizontally before being moved down, so that the tape cassette is set in a predetermined position on the chassis. The driving unit has a first pinion which is rotated forward and backward and a first rack integrally formed with the moving rod and made to engage with the first pinion.

Abstract: In a magnetic tape device, a tape cassette moving table 4 is placed between a pair of right and left guide plates 3a and 3b so as to be movable forward and backward (a and b). Rocking levers 8 which are engaged with the moving table 4, and a rotating cam 9 which is forward and reversely rotated by a driving source are interlockingly connected to each other via a slide plate 26. The rocking levers 8 are swung forward and backward (c and d) by the driving source via the rotating cam 9 and the slide plate 26 to move the moving table 4 forward and backward (a and b) between a cassette inserting position A and a cassette placing position B.

Abstract: In a magnetic tape device, a recessed groove 41 protruding from a moving table. A press spring 16 engaged with the lever 8 is pressed against the rod 5. The table is slightly pushed-in in a backward motion b direction by inserting a tape cassette to the table which is on standby at a cassette inserting position. When the pushing is detected and a driving source is activated, the lever 8 is swung backward (d), whereby the moving table is moved backward (b) via the rod 5 to a cassette placing position. A cam 42 is formed in the groove 41, and when the moving table is pushed-in from the cassette inserting position in the backward motion b direction, the rod 5 is transferred onto the cam 42 to increase the pressing force of the spring 16.