SU781930A1 - Key-actuated change-over switch for tape recorder - Google Patents

Description

(54) KEYBOARD SWITCH: FOR RECORDER

I

The invention relates to instrumentation and can be used mainly in household tape recorders as a key switch (KP), with the help of which a change in the operating modes of tape recorders.

Known KP, made with a number of axles, rods and ratchets. Such a CP is universal and can be used for a wide class of tape recorders [1].

However, its design is complex, which can lead to reduced reliability.

Closest to the proposed one is a gearbox for tape recorders, containing axes on which spring-loaded keys are mounted that can be rotated, fixing spring-loaded rotary bars and a fully spring-loaded rotary locking bar (2].

However, this gearbox is not convenient enough to operate and is somewhat complicated in design.

The purpose of the invention is to improve ease of use and simplify the design of the switch.

The goal is achieved by the fact that the gearbox is equipped with a spring-loaded two-arm pbrHardMjOCbkaHaHHn mounted on a locking rotary spring-loaded bar (SPP), which is perpendicular to the swing axis of this bar, while one shoulder arm is straight and is located with the possibility of interaction with the working stroke mode key, and the other shoulder is made G -shaped and arranged to interact with the Record mode key.

In FIG. 1 shows the proposed KP, a view of all the pressed keys; in Fig.2 section a — a. figure 1; in Fig.3 - the position of the elements KP th keys themselves with the pressed keys of the modes Record and image 3 re. Stop * 'Working stroke' · in Fig. 4 - the same, left view. *

The device operates as follows.

The keys 1 of the 'Record' mode, 2 presses' Rewind * one way, the 'Travel stroke' press and 4 modes * are installed on the axis 5, fixed in the base 6, and are pressed in the non-pressed state to the stop 7 under the action of torsion springs 8. Pressing the keys 2 each separately allows you to rewind only one way: either left or right. The blocking IFR 9 is installed on the axis 10 and interacts with the help of the shelf 11 with all keys except the key 4. Using the same shelf 12, the keys 1 and 2 are interacted. Under the action of the torsion spring <3, the strap 9 is pressed continuously by the shelf 11 to the keys . On the axis 14 there is a two-arm lever 15 pressed by the spring 16 to the bar 9 by the section 17 of the lever 15. This section is bent and this shoulder of the lever has a L-shaped shape. The other shoulder of the lever 15 is located under the key 3. At the base 6 are placed locking PPP 18 and 19, which spring 20 are pressed against the ends 21 of the unpressed keys. The bar 18 is made in such a way that when you press the key 1, it starts interacting with the edge 22 of the key 1, and when you press the key 2, it continues to interact with its end face 21.

When you press the key 2, the bar 9 is rotated, and the shelf 12 is located underneath the press keys, locking them. The strap 19 comes out of contact with the end face 21 of the key 2 and, resting on the edge 22 of this key, holds the reset 4, it is 18, the thirtieth strap 19. The latter comes out of contact with the edge 22 of the key 2, and this key with the help of the spring 8 returns to initial position. In addition, the strip 9 also returns to its original state when pressed. For the key 2, the key is pressed, it acts on the end face 21 on the plan with which it rotates

781930 ^k 4 position, unlocking / the rest of the keys. The key 3 works the same way. When you press the key 1, the bar 9 rotates, the lever 15 is rotated by acting on it through section 17, the other shoulder of the same lever comes out under the key 3, which only blocks the key 2. Keys 3 and 4 can be pressed. Fixation of the pressed key 1 is provided by the bar 18. To turn off the key 1, the -4. Key is pressed, which, acting on the straps 18 and 19, unlocks the key 1 and key 3 (if it was pressed), which, under the action of the springs 8, return to the original unpressed position. The bar 9 also returns to its original position, unlocking the key 2 and the lever 15.

The advantage of the proposed switch, which is used more simply, is that it is used in tape recorders for control.

Claims (2)

78 The working stroke in FIG. 4 is the same, left view. The device works as follows. The keys 1 of the Record mode, 2 modes Rewind to one side, 3 modes of Operation stroke and 4 CTC modes are mounted on the axis 5 fixed in the base 6, and pressed in the unlocked state to the stop 7 under the action of the torsion springs 8. Pressing keys 2 each separately allows rewinding only in one direction; or left or right. The interlocking SPT 9 is installed on the axis 1O and interacts with the help of shelf 11 with all the keys except the key 4. With the help of the shelf 12 it interacts with the keys 1 and 2. Under the action of the torsion spring f3, the bar 9 is pressed non-stop by means of the zero 11 keys. On the axis 14. There is a double-arm lever 15, pressed by the spring 16 to the bar 9 by the section 17 of the lever 15. This section is unbent and this lever arm is L-shaped. The other arm of the lever 15 is located under the key 3. In the base 6, the locking RFPs 18 and 19 are placed, which are pressed by the spring 20 to the ends of the 21 unstressed keys. Plank 18 is designed so that when you press the key 1, it begins to interact with the edge 22 of the key 1, and when you press the key 2 continues to interact with its end 21. When you press the key 2, the bar 9 rotates and the shelf 12 is located under not pressed, 1 keys, carried out their blocking. Plan 19 leaves the contact with the end face 21 of the key 2 and, abutting against the edge 22 of this key, keeps it pressed. To reset the key 2, press the key 4, it acts with the end face 21 on the bar 18, with which the bar 19 also rotates. The latter comes out of contact with the edge 22 of the key 2, and this key returns to its original position with the help of spring 8. In addition, the strip 9 also returns to its original position, unlocking / these remaining keys. Key 3 also works in the same way. If you press key 1, bar 9 rotates, lever 15 rotates due to its action through section 17, while the other arm of the same lever leaves key 3, and only key 2 is locked. 3 and 4 Mpir-yr be pressed. Fixing the pressed key 1 is provided by the bar 18. To key 1, the key 4 is pressed, which, acting on the bars 18 and 19, unlocks the key 1 key 3 (if the hedgehog was pressed), which are returned to the initial unstressed position by the action of springs 8. Plank 9 also returns to its original position, unlocking the key 2 and the lever 15. The advantage of the switch is that it is used in the recorders for easier operation. Claims A tape switch for a tape recorder comprising axes on which spring-loaded keys are mounted for rotation, securing pivotal spring-loaded strips and blocking rotatable spring-loaded plank, characterized in that, in order to enhance the convenience of operation and simplify the switch design, it has a locking rotary spring-loaded strap is a spring-loaded two-arm two-arm lever, the swing axis of which is perpendicular to the swing axis of this slat, with one shoulder the two shoulders are straight and are arranged to interact with the Working stroke mode key, and the other shoulder is L-shaped and arranged to interact with the Record mode key. Sources of information taken into account in the examination 1. Japanese patent number 51-5767, cl. 102 E 211.1, 23.02.76. 2. USSR author's certificate number 231859 Cl. G 11 B 15/10, 11.10.67 (prototype). s Sh II 1.1 rn. one hdLJ US.2