Abstract: A head plate operating mechanism for a cassette tape player has a head plate carrying a magnetic head and movably mounted on a frame for movement between non-play and play positions. A power-assisting notched gear having a crank pin on a rotation surface thereof rotates when a tape cassette is loaded into the player. A slide member movably connected to the head plate is actuated to move by slidably contacting with the crank pin of the rotating notched gear and restrains the head plate in its non-play position when the slide member is in its non-actuated state but releases the head plate so as to allow the movement of the head plate between the non-play and play positions when the slide member has been actuated by the crank pin.

Abstract: A tape player according to the present invention has a pivotal lever which is pivotally moved horizontally, when a tape cassette is loaded, from its ejection position to its loading position, the pivotal lever having a member engaged with a reel hole when a cassette is loaded connected to one end thereof, a pivotal member pivotally mounted horizontally pivotably having an operatively connecting member formed to be precluded from pivotal movement outside an instrument frame by used of an ejecting member in a non-lay state and adapted to control a spacing between opposite ends a torsion coil spring opposite ends of which are engaged by the pivotal lever and the pivotal member, respectively, further comprising an actuating member allowing pivotal movement of the pivotal lever when the latter is pivotally moved from the ejection position to the loading position and causing the pivotal lever to be pivotally moved from the loading position to the ejection position along with the operation of the ejecting member, a

Abstract: A radio receiving circuit provided with a search tuning mechanism. A broadcasting radiowave signal is received during a search tuning operation, and a shift amount of frequency produced in frequency of an intermediate frequency amplifier output is experimentally determined within an inertia self-travelling time interval search tuning mechanism due to the mechanical inertia thereof from the moment at which a drive force applied to the search tuning mechanism is interrupted to the time when the mechanism temporarily positively stops its function. The drive force applied to the search tuning mechanism is interrupted at a frequency deviated by the shift amount in advance from a center frequency of a pass band width of the intermediate frequency amplifier circuit, whereby after the mechanism has self-travelled due to its own mechanical inertia force and when tuned to the center frequency of the received radiowave signal, the search tuning operation is suspended.

Abstract: Disclosed is a push-button tuner in which two desired preset broadcasting frequencies can be tuned in by one push-button. The push-button tuner comprises a plurality of tuning mechanisms each constituted by an operation shaft, and a pair of tuning shafts disposed on the opposite sides of the operation shaft. These operation shaft and tuning shafts are supported movably between the front non-actuation position and the rear actuation position, the operating shaft being provided with a drive gear, a change-over mechanism for alternatively alternately causing the pair of tuning pieces to move relative to the operation shaft to the rear actuation position every one reciprocation of the operation shaft between the front non-actuation position and the rear actuation position, and an enlarging mechanism for enlarging the amount of moving stroke of the operation shaft member and for transmitting the enlarged amount of moving stroke to one of the tuning member which is in its movable state.

Abstract: An improved push button type tuner is disclosed which assures that an operator can selectively tune to one of two preset radio frequencies merely by actuating a single push button. The push button type tuner includes a plurality of channel selecting mechanisms each of which comprises an actuating shaft with a push button fixedly secured thereto and two channel selecting shafts disposed by both the sides of the actuating shaft. The actuating shaft and the channel selecting shafts are supported so as to move between the fore inoperative position and the rear operative position. The actuating shaft includes a main gear and a shifting lever which performs shifting operation in such a manner that the pair of channel selecting shafts are alternately displaced to the rear operative position at every time when a cycle of foreward and rearward movements of the actuating shaft between the fore inoperative position and the rear operative position is achieved.

Abstract: Disclosed is a push-button tuner having a plurality of push-buttons which are preset so as to tune in to preset frequencies of broadcasting stations, in which an actuator plate for setting the positions of variable tuning elements by depressing the push-buttons is divided into a plurality of actuator plate components and the variable tuning elements are allotted to the actuator plate components, the push-buttons being grouped corresponding to the actuator plate components, thereby reducing the actuator plate in size as well as in weight so that it is possible to tune in to the frequency of a desired broadcasting station with a light pressing force.

Abstract: A push-button tuner in which two desired preset broadcasting station frequencies can be selectively tuned in by one push-button comprises a plurality of tuning mechanisms, each of which comprises an operation shaft having a push-button, a pair of tuning shafts respectively disposed on the opposite sides of the operation shaft, and a change-over mechanism for effecting a change-over operation so as to cause the operation member to engage with alternate ones of the pair tuning members in response to alternate reciprocations of the operation member. The push-button tuner comprises a lock plate for holding the tuning shaft in the rear actuation position when it is located in the rear actuation position, and a restriction device for preventing the operation shaft from being urged further rearward when the tuning shaft is held by the lock plate thereby preventing excessive force from being applied to the change-over mechanism.

Abstract: A pushbutton tuner has a plurality of pushbutton actuators each comprised of a slide plate carried by a support plate for movement between operative and inoperative positions, a lockable control plate pivotally mounted on the slide plate, and a pair of upright pins fixedly mounted on the control plate. A pair of movable plates are carried by the support plate so as to be movable across the array of slide plates and both movable plates are formed with cam edges adapted to engage one of the upright pins of the pair as the slide plate moves to its operative position. The pair of movable plates are connected at one end to first and second link members which cause the movable plates to move in opposite directions in response to the engagement of respective ones of the upright pins with respective ones of the cam edges of the movable plates.

Abstract: A pushbutton tuner includes a plurality of pushbutton actuators each effective to achieve a tuning to a desired preset frequency. Each pushbutton actuator includes a slide plate carried by a support plate so as to be movable between operative and inoperative positions, a lockable control plate pivotally mounted on the slide plate, a pair of upright pins fixedly mounted on the control plate, and a pair of cam members having their one end pivotally mounted on the support plate so that one of the upright pins engages one of the cam members as the slide plate moves to its operative position. A pair of movable plates are carried by the support plate so as to be movable across the slide plates. One of the movable plates is pivotally connected with the other end of one of the cam members while the other movable plate is pivotally connected with the other end of the other cam member.

Abstract: A pushbutton tuner including a support plate, tuning means mounted on the support so as to be movable to a position which corresponds to a tuning frequency to be established, and a plurality of presettable pushbutton actuators for selectively adjusting the tuning means to individual positions, each of the pushbutton actuators including a pushbutton which is movable between a front inoperative and a rear operative position relative to the support plate and which is normally urged to its inoperative position, a control plate pivotally mounted on the support plate and having lengthwise elongate slots formed in its opposite ends, the control plate assuming a position relative to the support plate which can be adjusted, a preset plate for releasably locking the control plate on the support plate, a first operating lever having its one end pivotally mounted on the pushbutton and carrying a pin on its other end which is fitted into one of the slots in the control plate, and a second operating lever having its one en

Abstract: A frequency selector (tuner) employs a turret to select the position of a slide member that is coupled to a variable reactance. The slide member is moved away from the turret by depressing an operating member and returns to the turret when the operating member is released. Depressing the operating member rotates the turret concurrently with the movement of the slide member, but interference between the slide member and cooperating position setting elements that project from the turret is avoided by a displacement mechanism on the slide member. The projection of the position setting elements is adjusted by turning the operating member. A further operating member is provided for turning the turret in opposite directions, the final position of the slide member being set by depressing the first-mentioned operating member.

Abstract: A channel-selecting, presettable, rotary type tuning device in which there is provided a tuning-position-determining unit having two or more tuning-position-determining elements, whose positions may be adjustable; a slide member operably coupled to a variable tuning element and spring-loaded so as to abut the end of each tuning-position-determining element selected due to the rotation of the tuning-position-determining unit; means for rotating the tuning-position-determining unit so as to select a tuning-position-determining element; means for moving back and forth each tuning-position-determining-element thus selected; and means for temporarily releasing the slide member from its abutment on each tuning-position-determining element thus selected.

Abstract: A dual band pushbutton tuner is disclosed having a pair of tuning slide assemblies disposed on the opposite sides of a pushbutton slide and which can be selectively actuated in conjunction with an operation of the pushbutton slide, without using a shuttle. Each of the tuning slide assemblies is normally connected with the pushbutton slide through connection means, which is constructed such that when one of the tuning slide assemblies is constrained by constraining means, the other tuning slide assembly is permitted to move in response to an operation of the pushbutton slide. The pair of tuning slide assemblies alternately assume this manner of operation as the constraining means is switched.

Abstract: This invention relates to a cassette tape player comprising a fixed frame and a movable frame which is slidable with respect to said fixed frame in such a manner as that of a drawer. The fixed frame is provided with such electric systems as a motor and magnetic head; said movable frame is provided with a capstan, pinch roller, reel shafts and a driving system for driving and connecting these members. When the tape is stuck around the capstan and the pinch roller, the movable frame is drawn to remove the tape easily from the fixed frame and, at the same time, a burn-out of lead wire may be prevented.

Abstract: A pushbutton tuner has a plurality of presettable pushbutton actuator assemblies. Each of the pushbutton actuator assemblies comprises a slide mounted on a support so as to be movable between a forward inoperative position and a rearward operative position and normally biased into the inoperative position, a control member pivotally mounted on the slide and having an upstanding pin mounted thereon and being adjustable positionable relative to the slide, a preset member for releasably locking the control member to the slide, and a pushbutton carried by the preset member and having a forward end of the slide slidably received therein. The pushbutton actuator assemblies are disposed in a direction transverse to a movable part of a tuning element.

Abstract: An actuator for a pushbutton tuner comprises a pushbutton slide, a pair of slideable tuning slides, interconnecting means for selectively connecting the pushbutton slide with either one of the pair of tuning slides, and shift means for controlling the connecting state of the interconnecting means. The interconnecting means comprises a pair of interconnecting members each comprised of flexible material and each being connected at one end to respective ones of the tuning slides and having means at the other end for selectively engaging with the pushbutton slide. Movement of the shift means in one direction effects corresponding movement of one interconnecting member to its operative position simultaneously with movement of the other interconnecting member to its inoperative position and movement of the shift means in the other direction effects the reverse movement of the interconnecting members.

Abstract: An interconnecting member which operatively connects a pushbutton slide with either one of a pair of tuning slides comprises a flat body portion which has its one end pivotally connected with the pushbutton slide. At its other end, the body portion is provided with means for mechanically engaging with one of the pair of tuning slides selectively. The body portion is also provided, at said other end, with means for engaging with shift means which shifts the interconnecting member from one operational position to the other operational position. The interconnecting member moves angularly across the surface of the pushbutton slide in response to an operation of the shift means.

Abstract: An interconnecting member which operatively connects a pushbutton slide with either one of a pair of tuning slides selectively is carried by shift means which moves it from one of its operational positions to the other. When a selected tuning slide reciprocates within a stationary guide channel together with the pushbutton slide, the interconnecting member moves over the shift means concurrently.