DE1053205B - Switching device for pickup system - Google Patents

Description

The invention relates to a Umscfaaltvorridhtung for a pivotable about an axis fixed in the tonearm, Pick-up system provided with two scanning needles one behind the other.

The invention is based on the object of providing a switching device for pickup systems create, which can be tilted about an axis perpendicular to the longitudinal direction of the tonearm. The knob the Umscihaltvorrichtung should be arranged on the front of the tonearm. The arrangement should also have a allow quick and easy replacement of the pickup system.

Switching devices for pickup systems with two scanning needles lying one behind the other are known, in which the pickup system is tilted by actuators at an angle in its longitudinal direction, such that either the one or the other needle comes into working position. The swing angle of the rocker arm or The rotary knob is smaller than 90 °; however, the rotary or toggle button is not on the face of the Arranged on the tonearm, but accessible from the top of the tonearm. The pickup system is on the one hand on one or more retaining elements that are resilient with respect to the tonearm, on the other hand a switching element that can be tilted about an axis lying transversely to the tonearm.

Furthermore, Umsahaltvorrichtungen are known in which a front side arranged rotary knob over one axis is rigidly connected to the pickup system, with the stylus next to each other or are arranged offset from one another by 180 °.

It has now been found to be useful for use, including the pickup systems to provide scanning needles arranged one behind the other with a switching device, the rotary head of which Is arranged at the front, since a button arranged in this way is often more easily accessible than one on the Top of the tonearm arranged. The invention provides a solution, as by rotating the Button by 180 ° the desired pivoting of the pickup system can be achieved.

The invention consists in that a spring against the front extension of the Tonabnefamersystem presses the cam of a rotary knob arranged in the longitudinal axis and on the face of the tonearm and that the pickup system by 'turning this knob in the working positions of the two Scan needle is pivotable.

In Fig. La, Ib and Ic and IIa and IIb, two embodiments of the invention are shown; in

Fig. Ib is a section along the line AB of Fig. Ia;

Switching device
for pickup system

Applicant:
Dr. Steeg & Reuter GmbH,
Bad Homburg vd Höhe,
Kirdorf er Str. 9-13

Ludwig Schröder, Bad Homburg vd Höhe,
has been named as the inventor

FIGS. IIa and IIb show an arrangement in which the two springs are used simultaneously to draw current to serve.

The pickup system 1 is mounted by means of two laterally attached pins 4, 4 'in the open slot _{bearings which are located in the tabs IO j} 10' of the support bracket 8. The bracket 8 is screwed into the tonearm 19. The two scanning needles 3 and 3 'are arranged one behind the other on the needle carrier 2.

A spring 9 is attached to the support bracket 8, the long leg of which from above onto the housing of the Tonabnefamersystem 1 presses and thus the front extension 5 of its housing always against the cam 14 presses. To guide the spring 9, a slide bed 6 is provided on the housing of the pickup system. On the one hand by the pressure of the spring 9 on the pickup system 1 and on the other hand by the counter bearing on the cam 14 the pickup system is held in the slot bearings 10, 10 'on the support bracket 8. In this way, it is ensured that the Tonabnefamersystem is badly able to be selected.

The system is switched over by means of the rotary knob 11, which is connected to the cam 14 same Adhse 12 sits and is rigidly connected to this. The rotary knob 11 is provided with a tension spring 15 connected, which offset him after exceeding their dead center in the 180 ° against each other can jump both end positions. When the rotary knob is turned, the cam 14 pivots the pickup system 1 around the pin 4., 4 ', such that either the stylus 3 or 3' in working

809 770/235

Claims (3)

position comes. The snap spring 15 arranged between the support bracket 8 (attachment point 17) and cams 14 (attachment point 16) has the task of always bringing the rotary knob into the end positions offset by 180 ° from one another, which are given by the stop 18 '. As a result, the working positions for the scanning needles are determined without the operator having to observe a certain angle when turning the rotary knob 11. ίο The system is connected in the exemplary embodiment according to FIG. I to the sockets 7, T via flexible strands. A switching device similar to that in FIG. I is shown in FIGS. IIa and IIb. However, two springs 9, 9 ″ act on the pickup system 1 to generate the preload, which are simultaneously designed as contacts Establish connection to the piezoelectric element. The springs 9, 9 ″ are provided at their ends with soldering lugs 27, 27 'for connecting the connecting lines. The remaining parts are designated as in FIG. Patent claims: 1. Switching device for a pivotable about a fixed axis in the .Tonarm, provided with two consecutive scanning needles pickup system, characterized in that a spring (9) the front extension (5) of the pickup system (1) against the cam (14) of one in the Longitudinal axis and on the front side of the tonearm (19) arranged rotary knob (11) and that the Tonabnelhmersystem can be pivoted by turning this rotary knob in the working positions of the two scanning needles (3, 3 ') . 2. Switching device according to claim 1, characterized in that the pickup system (1) is mounted with two laterally attached pins in two slot bearings open on one side. 3. Switching device according to the preceding claims, characterized in that the spring (9) pressing on the housing of the pickup system (1 ) is designed as a pair of contacts. Considered publications:
German utility model No. 1 695 962. 1 sheet of drawings © 809 770/235 3.59