DE1260645B - Holding arm for electrodes on shortwave diathermy machines - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

A61n

German KL: 21g -23/02

Number: 1260 645

File number: S92120 VIIIc / 21j

Filing date: July 18, 1964

Open date: February 8, 1968

The invention relates to a holding arm for electrodes on short-wave diathermy apparatus, which is used to a horizontal and a vertical axis pivotably articulated on the apparatus housing. is and off at least two one behind the other in the longitudinal direction of the arm and articulated parts.

The holding arms for electrodes used so far in practice consist of a stiff, telescopic one Extendable tube that can be swiveled around a horizontal and a vertical axis on the apparatus housing is articulated via a spring weight compensation. Such holding arms have the disadvantage that you Swivel range is not sufficient, especially for treating patients in bed, sometimes too then not if the entire apparatus is also moved to adjust the electrode. Disadvantageous is also that when pivoting the support arm around the housing-side horizontal axle bearing - to adjust the electrode higher - the previously set inclination of the electrode changes each time changes, so that it is often necessary to change between height adjustment and inclination adjustment several times is.

Another electrode holding arm has been described in the patent literature, which consists of two straight, In the longitudinal direction of the arm there are tubular parts lying one behind the other, which are secured by a double joint are connected to the support arm in two mutually perpendicular directions to be able to bend. Both joint points of the double joint must be provided with a friction brake be. Every adjustment of the first arm part brings about a change in the on that arm device-side horizontal joint acting torque with itself and each adjustment of the second Arm part a change in both the horizontal connecting joint of the two arm parts as torque acting on the device-side joint. The joint friction is therefore in each case on the maximum torque that occurs is set, d. This means that the joints - especially with relatively heavy electrodes - stiff and therefore difficult to adjust. Also with this holding arm must adjust the inclination by swiveling the second arm part to adjust the height a stiff or lockable joint axis can be corrected. This electrode holder arm has not found in practice for the reasons mentioned.

The invention is based on the object of constructing an electrode holding arm which, under the holding arm for electrodes
Short wave diathermy machines

Applicant:

Siemens Aktiengesellschaft, Berlin and Munich, 8520 Erlangen, Henkestr. 127

Named as inventor:

Willi Werner, 8520 Erlangen, Germany

retention of the variety of adjustment options of known retaining arms is much easier and simpler should be adjustable.

This object is achieved in that in this holding arm at the free end of a first arm part, which is designed as a parallelogram with spring weight compensation and on the apparatus housing is articulated, via a double joint designed as an angle piece, a second arm part in the Is articulated way that the elbow with its one end in a vertical axle bearing a is rotatably supported by the intermediate piece guided by the parallelogram and its other end is designed as a horizontal axle bearing for the second arm part, which is bent at right angles and at its free end is provided with at least one axle bearing for the electrode holder.

When the electrode is adjusted in height by pivoting the parallelogram arm, the Electrode in its set direction in the room. The z. B. by pivoting the parallelogram arm in the horizontal caused the increase in the distance between the electrode and the side wall of the apparatus housing at which the articulation point of the holding arm is, can by bending the arm sideways around its vertical joints Getting corrected. The bending of the arm around its vertical joints is effortlessly possible because these Joints can be designed smoothly and without braking or locking, because the weight the electrode and the individual arm parts does not act in terms of an adjustment with respect to the vertical axes of the joint parts to each other. The holding arm according to the invention can therefore easily and without Actuation of locks with distance correction while maintaining the electrode direction in any desired altitude can be brought, which is a noticeable relief for the practitioner - mostly female - means operators.

809 507/514

Also the adjustment of the electrode from a highest, downwardly directed position to a lowest one upward position is essential compared to the holding arm known from the patent literature simplified. Only two adjustments are required, namely pivoting the first part around the housing-side horizontal axis downwards (lowering of the parallelogram support arm) and pivoting the second arm part

joints with the horizontal axes 17,18 are articulated. In the intermediate piece 16 is around vertical axis 19 rotatably supported the angle piece 20. Can be pivoted about the horizontal axis 21 the angle piece 20 carries the arm part 22 bent at right angles at its end which is perpendicular in FIG. For this purpose, the angle piece 20 is provided with the stub shaft 23 on which the arm part 22 is mounted (Figures 2 and 3). The stub shaft 23 has one

around the horizontal axle bearing in the angle piece io flange 24 with four evenly over its circumference

by 180 °.

The holding arm according to the invention is opposite to the arm known from the patent literature in each any adjustment always weight-balanced; he

distributed notches 25, in which when pivoting the arm part 22 about the axis 21 of the inside of the Arm part 22 rotatably hinged about the horizontal axis 26, double-armed lever 27 under the pressure

Armes therefore also does not have this known support arm, which serves other purposes.

An embodiment of the holding arm according to the invention is shown in the figures. the end

F i g. 1 is part of a short-wave diathermy apparatus with the electrode holding arm held on it evident;

F i g. 2 shows a partially broken page

is therefore easily adjustable and remains easily 15 of the spring 28 latches one after the other. That of the pen stand in every set position. 28 adjacent end of the lever 27 has part 29

In the case of support arms, the purposes other than that of the bracket through the wall of the arm part 22 Serving of electrodes, it is known to be carried out by pressing on him the to be able to solve a first arm part as a parallelogram with spring detent. If desired, a to form weight compensation and to a so that 20 unlimited pivoting of the arm part 22 around the guided intermediate part to avoid a curved second axis 21, the flange 24 with Arm part by means of a vertical axle bearing at the stop 30 or 30 'indicated by dashed lines to steer. However, this support arm is missing when it is provided for the lever 27 (FIG. 3). Both stop arm according to the invention, essential double strikes are arranged so that the arm part 22 of joint elbow. The described advantageous 25 of the, for example, vertically upwardly directed, Possibility of setting the new electrode holding locked position only in one direction of rotation in the

vertically downward, locked position can be adjusted. While the stop 30 in its width in the direction of rotation of the arm 22 is narrow and therefore a pivoting movement of the Arm 22 allowed by about 340 °, the stop 30 'extends in its width in the direction of rotation of the Arm 22 between two opposing notches 25 and therefore only allows a pivoting

view of the holding arm according to FIG. 1 in an enlarged 35 movement of the arm 22 by 180 °. The conclusion of the Scale represents, and the horizontally lying end of the arm part 22 forms

F i g. 3 illustrates a section along the connecting piece 31 to the actual electrical line ΙΙΙ-ΙΠ the F i g. 2. The bracket 32, which corresponds to the German

On one side wall of the short-wave utility model 1891869 as a plug-in pin coupling diathermy apparatus 1, the parallelogram part 2 40 can be formed. The connecting piece 31 of the electrode holding arm is held rotatably about the axis 33 in the arm part 22 via the intermediate piece 3, pivotably attached about the vertical axis 4 (FIG. 2) and the electrode holder 32 is articulated about the axis 34. The two parallelogram arms are formed by the profile tube 5 and the strut 6 being pivotably articulated on the connecting piece 31. That (Fig. 2). These two hinge points are provided with a friction profile tube 5 around the horizontal axis 7 and the 45 exercise, which the relatively small strut 6 is pivotable around the horizontal axis 8 absorbs torques held by the weight of the intermediate piece 3. The strut 6 is surrounded by the electrode and the only short lever arm given by the compression spring 9, which is shown in FIG. 2 are. At these hinge points, the friction interferes with the rest of the lower end at 10 with the strut 6 is gens little because adjustments are required at these points sel- and those with their other end at 11 over the 50 th are required. The electrode 35 corresponds to the cross strut 12 is attached to the profile tube 5 and electrode according to German patent specification 1082358. which serves in a known manner as a weight compensation. The power supply cable is designated by 36. With the profile tube 5 is close to its housing-side
End of the clamping piece 13 firmly connected to the
the strut 6 between two by the screw 14 55
Clamping jaws drawn against each other is clamped adjustable. The head of the screw 14 is through the
Recess 15 in the profile tube 5 is accessible from the outside. The adjustable friction caused by the clamping piece 13 between the two parallelo 60
low-gram enlarges the area in which the
Spring 9 balances the weight of the electrodes required for the treatment. By means of the screw
14 this friction can be adjusted so that a
Weight balancing occurs practically at all- 65
is given to the treatment electrodes.
. The parallelogram arms guide the intermediate piece 16, on which they are attached by means of the two rotating

Claims (4)

Patent claims: 1. Holding arm for electrodes on short-wave diathermy machines, around a horizontal and a vertical axis is pivotably articulated on the apparatus housing and consists of at least two in the longitudinal direction of the arm one behind the other and hingedly connected parts consists, characterized in that at the free end one on the apparatus housing hinged first arm part (2), which is designed as a parallelogram with spring weight compensation is, via a double joint designed as an angle piece (20), a second arm part (22) is articulated in such a way that the elbow (20) with its one end in a vertical axle bearing (19) one through the parallelogram part guided intermediate piece (16) is rotatably supported and its other end as a horizontal Axle bearing (21) is formed for the second arm part (22), which second arm part Bent at right angles and at its free end with at least one axle bearing for the electrode holder is provided. 2. Holding arm according to claim 1, characterized ge ίο indicates that the pivot connection between the elbow (20) and the second Arm part (22) has latching positions offset from one another by 90 ° (FIG. 3). 3. Holding arm according to claim 2, characterized in that one of the four locking positions as Stop to limit the pivoting movement of the second arm part around the horizontal axle bearing of the elbow is formed. 4. Holding arm according to claim 3, characterized in that the stop is between extends two opposing locking positions. Considered publications:
German Auslegeschrift No. 1110 337;
British Patent No. 554,319;
U.S. Patent No. 2,202,195;
"Frontier Areas of Medicine", 1949, no. 11, p. 494. 1 sheet of drawings 809 507/514 1.68 Bundesdruckerei Berlin