RU977U1 - Cassette tape drive mechanism - Google Patents

Abstract

1. The tape drive mechanism of the cassette recorder, comprising a chassis, a drive motor rotating in one direction, with a pulley connected by a rubber strap to the flywheel of the drive shaft and a winding disk with a sleeve, disks and pulleys of the receiving and feeding pod cassette assemblies with - movable brackets, a base with magnetic - heads and a pressure roller with a spring-loaded bracket, characterized in that, in order to reduce dimensions, improve manufacturability and reliability of the mechanism, a button switch is inserted into it - operating modes, each button of which is made by a single slider, having - cutouts and protrusions for carrying out the established - moving relative to the chassis and - controlling the elements of the mechanism - and is located on one side, and the latch of the switch buttons on the opposite side of the chassis, the disks and located - planetary with them pulleys with movable spring-loaded brackets - receiving and feeding units are placed - on a removable base, mounted slightly below the base plane of the chassis. 2. The mechanism according to claim 1, characterized in that the stop button slider has an element acting on the control of the cassette lifting system.

Description

PM 9ft.g THE CURRENT MAGNET CARTRIDGE MECHANISM

The utility model relates to instrumentation, in particular to tape drives that can be used i cassette Devices for magnetic recording and playback

Known tape drive mechanisms of cassette recorders / 1.2./ made according to a single-motor kinematic scheme with an indirect drive of the drive shaft from the electric motor using a drive, having supply and receiver units magnetic heads, a pressure roller and key switches of operating modes that control the elements of the mechanism through intermediate levers and pushers, which necessitates a relatively large size mechanism, reduces its reliability and manufacturability.

Closest to the proposed one is a tape drive mechanism of a cassette recorder / 3 /, comprising a chassis, a drive motor rotating in one direction, a flywheel with a drive shaft, receiving and supplying sub-cartridge assemblies, magnetic heads and a pressure roller

This mechanism also has a key switch for operating modes, as well as a separate key for lifting the cassette, and the disks and pulleys of the receiving and feeding sub-cassette units are located above the base plane of the chassis, which limits the size of the mechanism.

A utility model is proposed with the aim of reducing the dimensions of the tape drive mechanism, increasing its reliability and manufacturability in manufacturing by introducing a button switch into the mechanism, each button of which is made with a single slider, with placement

ШШ5 & II В 15/18

sliders and a switch latch on different sides of the chassis of the disk and the pulleys of the receiving and feeding sub-cassette assemblies located on them with a single base reinforced slightly below the plane of the chassis.

The utility model contains a chassis, one of the planes of which is the base, a drive motor with pulleys rotating in one direction, a drive shaft flywheel connected to the engine pulley with a rubber band, disks and pulleys of the receiving and feeding sub-cartridge assemblies whose spring-loaded brackets are movable, the base, on which magnetic heads and a pressure roller with

spring loaded bracket.

Unlike the prototype, the utility model contains a push-button switch of the operating modes of the mechanism, each button of which is made by a slider, without intermediate levers and rods. Button sliders are located on one side of the chassis, and a button lock on the other. The sliders have cutouts and protrusions of various shapes for the implementation of the established movement relative to the chassis and control elements of the mechanism. The disks and pulleys located planetary with it with movable spring-loaded brackets of the receiving and feeding sub-cassette units are placed on a removable base, which is strengthened - somewhat lower - recessed - relative to the base flatness of the chassis. ;

The introduction of a push-button switch of this design and the recession of the base of the sub-cassette units allows to reduce the dimensions of the mechanism - to make it thinner. The execution of each switch button with a single slider increases the reliability and adaptability of the mechanism, and the placement of disks and pulleys of cassette units planetary and on a removable base increases its reliability, the effect of self-regulation and adaptability, respectively. The mechanism has reduced the total number of springs.

In the particular case of execution in the mechanism, the button for lifting the cartridge is excluded, while its function is assigned to the button for stopping the mechanism, which additionally makes it possible to reduce its dimensions.

Below are the drawings and a description of the design of the utility model.

The drawings show:

figure 1 is a kinematic diagram of the tape drive IB mode

figure 2 is a kinematic diagram of a tape drive in playback mode;

Fig. 3 is a kinematic diagram of a tape drive mechanism in the fast forward mode;

4 is a kinematic diagram of a tape drive in the mode of rewinding to the left;

5 is a kinematic diagram of a tape drive in Record mode;

6 - the location of the push button switch and the base podkassetnyh nodes relative to the chassis.

Pa figures position numbers denote:

1.Switch switch.

2. Switch Rewind left.

3.Voepred Switch & Building.

4. Switch Rewind to the right.

5.Switch switch.

6.Latch switches. . The base of the head block. 3. Pinch roller. all jin tele block zune

ft J. Bracket of the pulley of the receiving pad cassette assembly. 11. Disk pryshogo podkassetnogo site. 12. Flywheel. 13. A pulley of the giving podkassetny site. 14. An arm of a pulley of the giving subcassette node. 15.Disk of the giving subcassette node. 16. The fixing ledges of the sliders of the switches. 17.Fzhsiruyushchie protrusions of a clamp of switches. 18.Switch spring Play. 19. $ ICK winding. 20. Winding disc bushing. 21. Magnetic holoshey. 22. Leading shaft. 23. A bracket. 24. The electric motor. 26. Pass. 26. Stop slider switch Rewind left. 27. The protrusion of the reset switch latch. 28. The protrusion of the slide switch Stop. 29. Cassette lift system control. 30. Slider switch operation mode. 31. The basis of the receiving and feeding podkassetny nodes. 32. base plane of the chassis. In the position of the tape drive in the Stop / Fig. 1/ mode, the operation mode switches 1,2,3,4,5 under their action are in the initial / unpressed / position. The spring switch is held in the far right position. The base in the heads 7 with the pressure roller 8 is rigidly fixed to the half switch. Playback 3 is located in the lowermost

45 position. The pulley 9 of the receiving pod-cassette bridle, with its bracket Yu, pivotally mounted on the rest of the disk II of the receiving pod-cassette unit, is spring-pressed against the “yakovik 12. On the supporting pod gag unit of the yak 13 with its bracket 14, pivotally mounted on the axis of the disk 15, the spring is constantly pressed against the disk 15, creating inhibitory effect during its rotation.

When implementing the Play / 2 / mode, the Play 3 switch is pressed. In this case, the locking protrusion 16 of the slide of this switch, pressing the switch retainer b to the left corresponding to the locking tab of the locking protrusion 17 of the switch retainer 6, extends beyond the locking protrusion IV, after which the switch retainer 6 moves slightly to the right and holds the Play button 3 in the unpressed position, the switch spring 18 is pulled, moves the winding disk, 19, pressing its sleeve 20 against the disk II of the receiving podkassetny site. The protrusion of the Playback slide switch 3 makes the pulley 9 of the receiving pod cassette node out of contact with the flywheel 12 by moving its spring-loaded bracket 10. The base 7 of the head unit moves upward while pressing the magnetic heads 21 to the magnetic tape and the pressure roller 9 and magnetic tape to the drive shaft 22 of the flywheel 12, this bracket 23, unfolding on its axis, pulls its spring. At the same time, the electric motor 24 is turned on, the rotation from which is transmitted by the belt 25 to the flywheel 12 and the winding disk 19. At the same time, the magnetic tape. Is pulled by the drive shaft 22 of the flywheel 12 and the sleeve 20 of the winding disk 19 provides its winding through the disk II of the receiving cassette assembly.

When the rewind mode is implemented to the right / Fig. 3/, the Rewind switch 4 is pressed. In this case, the interaction of the locking protrusions 16 and 17 of the slider of this switch and the latch of the switches 6 is carried out similarly to the previous one.

/ {

pulling it, it will move it and engage the pulley 9 of the receiving podketsetny node with the disk II of this node while maintaining its engagement with the flywheel 12. At the same time, the electric motor 24 is turned on, the rotation of which is transmitted by the belt 25 to the flywheel 12, the pulley 9 and the disk II of the receiving podcastet node.

When the Lermotka mode is implemented to the left / Fig. 4/, the Rewind 2 switch is “monthly.” The interaction of the locking protrusions 16 and 17 of the slider of this switch and the latch of the switches 6 is carried out in this case similar to the above. The bracket 14 of the pulley 13 of the feed podketsetnogo node, unfolding under the action of its spring resting on the moving stop 26 of the slide of the switch Pereklazha left 2, moves around the axis-disk 15 of the feed podkesetnogo

of the assembly and engages the pulley 13 with the pulley 9 of the receiving podkosetny node, while maintaining its engagement with the disk 15. At the same time, the electric motor 24 is turned on, the rotation of which is transmitted by the belt 25 to the flywheel 12, the pulley 9 of the receiving podkesetny node, the pulley 13 and the disk 15 of the feeding podkesetnoy node .

When the Recording mode is implemented (Fig. 5 /), the Record I and Playback 3 switches are pressed simultaneously. In this case, the interaction of the locking protrusions 16 and 17 of the sliders of these switches and the latch of the switches 6, as well as the interaction of the mechanism elements when the switch is pressed, Playback 3 is performed similarly to the above.

To bring the tape drive mechanism to its original position in the Stop / FIRD / - mode, the Stop 5 switch is pressed. In any mode of operation of the mechanism / see Fig. 2,3,4,5/, the switch lock 6 has moved to the left and is fixed in the position at which the bevel its reset protrusion 2 is set against the protrusion 23 of the switch slide Stop b. When the Stop 5 switch is pressed, its protrusion 28, sliding along the bevel of the reset protrusion 27 of the switch latch b, moves it to the left so that it is disengaged from the locking-7 ledge 17 of the switch latch 6, the locking lug 16 of any of the switches 1,2,3,4 the mode of operation of the mechanism, which with their springs return themselves and bring all the elements of the mechanism to its original position / FIGL /.

6 a particular case of the execution of the tape drive mechanism, when the Stop 5 switch performs the cassette lifting function, when pressed to bring the mechanism to its original position, the switch will not move to its extreme pressed position, since its travel will be limited by a special platform for the discharge protrusion 27 of the switch latch b. When releasing the pressed switch, Stop 5 ate bringing all the operation mode switches 1,2,3,4 to the initial position, the switch latch 6 moves to the extreme right position. In this case, the protrusion 27 of the reset makes it possible to move the slide of the Stop 5 switch when it is pressed again to the extreme pressed position, at the end of which it interacts with the control element 29 of the cassette lifting system.

The relative position of the sliders 30 switches of the operating modes 1-5, the latch of the switches 6 and the base 31 of the receiving and feeding sub-cartridge assemblies relative to the base plane of the chassis 32 is shown in Fig.6. The sliders 30 and the latch of the switches 6 are placed on different sides of the chassis base plane 32, and the base 31 of the receiving and feeding sub-cassette units is located below the base plane 32 of the side opposite to the cassette position. The placement on the basis of 31 disks and pulleys of the receiving and feeding sub-cartridge units is carried out planetary.

Using the utility model allows to significantly reduce the dimensions of cassette recorders, to increase their reliability in operation and manufacturability.

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There are also information taken into account:

X A.V., Kozyrev, M, A.Fabrik. Designing an amateur tape recorder. -M.: DOSAM, 1974.-p. 35-36.

2, c. I. Shevchenko et al. Household equipment for magnetic recording: C: favochnyak-M.: Radio and communications, 1937.-s., 271.

3.il .A. Bradsky. Machitophones: a reference manual for operation and repair.-Mshsk.: Higher school, 1978.c. 317-319./PrototidL

Chairman of the cooperative

A.B.Bogomolov

Claims (2)

1. The tape drive mechanism of the cassette recorder, comprising a chassis, a drive motor rotating in one direction, with a pulley connected by a rubber strap to the flywheel of the drive shaft and a winding disk with a sleeve, disks and pulleys of the receiving and feeding pod cassette assemblies with - movable brackets, a base with magnetic - heads and a pressure roller with a spring-loaded bracket, characterized in that, in order to reduce dimensions, improve manufacturability and reliability of the mechanism, a button switch is inserted into it - operating modes, each button of which is made by a single slider, having - cutouts and protrusions for carrying out the established - moving relative to the chassis and - controlling the elements of the mechanism - and is located on one side, and the latch of the switch buttons on the opposite side of the chassis, the disks and located - planetary with them pulleys with movable spring-loaded brackets - receiving and feeding units are placed - on a removable base, mounted slightly below the base plane of the chassis. 2. The mechanism according to p. 1, characterized in that the stop button slider has an element that acts on the control element of the cassette lifting system.