DE2849035A1 - DENTAL TREATMENT DEVICE - Google Patents

Description

summary

The invention relates to a dental treatment device in the form of a so-called whip device with an on Restoring moment acting on the whip arm, which is generated by a spring, the point of application of which is on the whip arm with a cam acting at the same time as a switching element with the swivel angle of the whip arm will.

To take into account the influence of the effective weight of the dental instruments in different inclined positions of their storage holders are adjustment means accessible from the outside available for changing the spring tension. This influence is achieved by taking measures to increase the friction between Storage holder and instrument reduced. The whip arms are uniform by means of externally accessible adjusting means Adjustable inclination.

State of the art

With known dental treatment devices in the form of so-called whip devices it can be achieved that the Restoring force acting on the supply line of an instrument in preferred inclined positions of the whip is practically imperceptible to the practitioner even without locking the retraction devices. .

For this purpose, for example, according to DE-OS 20 44 424, the whip with an acting with respect to its pivot axis Coupled counterweight, which counteracts the positioning force from a certain angle of inclination of the whip. At this Arrangement sets the effect of the restoring force during the Bringing the instrument out of its rest position into its position of use when the whip reaches a very specific inclination position. At the passage of the whip This position creates a jolt on the instrument in the hand of the practitioner.

030021/0318

With whipping devices it should be achieved that the functional connection of the instruments to retrieval devices for the supply lines for the practitioner takes a back seat.

Due to this jolt, however, the opposite effect is achieved, which allows the practitioner to adapt to the special Properties of his device required. He must direct his attention to the fact that the jolt does not slip away from the grasped one Instrument.

When the counterforce members take effect, a restoring torque is set one whose size changes with the angle of inclination as a parameter. The momentum of the whip is however not only dependent on the angular position of your whip arm, but also on the position of the overall center of gravity from whip arm and supply line. The shift of this center of gravity during the transfer of an instrument from its rest position to a position of use, however, cannot be taken into account with the arrangement of a counterforce member which generates a restoring torque that can only be influenced by the angle of inclination.

The disadvantageous effect of the jolt described is already avoided by devices in which the restoring torque is generated with a spring hinged on the whip arm. This, however, allows a balance between Actuating torque and restoring torque on the whip only in a preferred inclined position of the whip and at best one reach very narrow area around this location.

task

With the device according to the invention, a whipping device is intended be proposed in which the balance between the actuating torque and the restoring torque on the whip over there is a wide range of whip inclination, especially in the area of the treatment positions, in which there is next to the inclination of the whip arm also the shift in the center of gravity

030021/0318 ^{/ 6}

the entire whip as a result of the approach of the supply line - affects the size of the actuating torque by means of the associated instrument on the patient. The advantage of the jerk-free handling of the facility is intended be preserved. The means for influencing the restoring torque should also trigger the switching functions for operating the instruments for their optimal use.

drawings

An embodiment of the invention is in the drawings shown.

Fig. 1: External appearance of an inventive Device with the arbitrary number of 3 instruments, the associated whips and their arrangement in the rest position of the instruments.

Fig. 2: Sectional view of a whip arrangement with the instrument removed from the rest position.

Fig. 3: Section of the right end of Fig. 2 but with the whip arm in the rest position.

description

The description is based on what is shown in the drawings Embodiment.

The holding and retraction devices (1) arranged next to one another in accordance with FIG. 1 are made in accordance with FIG Fig. 2 essentially consists of a housing (2), a hub (4) pivotable therein about a horizontal pivot axis (3), one with this hub firmly connected whip arm (5), one coaxial with the pivot axis and firmly connected Cam disc (6), a switching means which is in operative connection with the cam disc and can pivot about an axis (7) fixed to the housing (8) for actuating one or more electrical switches (9) and / or pilot valves (not shown), a spring (10), the left end of which is clamped on a pin (11) and at the right end a rope (12) or the like.

030021/0318 ^h

is attached, which over part of the circumference of the The cam rests against this and is fastened to it at the point (13), an actuator (14) for fixing of the left end of the spring within a range given by a cutout (15), an adjustable one Bolt (16) which cooperates with a housing-fixed stop (17) according to FIG. 3, one for receiving a Instrument (18) formed storage holder (19) with a pivot axis (20) fixed to the housing and one with the storage holder cooperating actuator (21).

In the position of the whip arm (5) shown in Fig. 2 the dental instrument (not shown here) has been removed from its holder and is located in a position of use - in the hand of the practitioner -. By the movement of the instrument in this sense is the whip arm (5) through the supply line (22) which is fixed with the grommet (23) on the housing (2), pivoted from its position according to FIGS. 1 and 3 into one according to FIG. 2,

Measured at different "extension lengths" of the supply line from the point at which it leaves the whip arm, i.e. when the instrument is used in different positions the loop (24) running through the whip arm according to FIG. 2 at different heights, that is to say in different angular positions of the whip arm (5). One of these angular positions is shown in FIG. Here in it is made clear that on the whip arm with increasing inclination next to the one following a sine function, it rotates to the left Actuating torque as a result of the change in the lever arm related to the pivot axis (3) for attacking the center of gravity of the whip arm a rectified actuating torque from the center of gravity of the supply line acts, which however no sinusoidal curve related to the swivel angle having.

030021/0318

According to the invention, the restoring torque is now generated by the spring (1O) and the restoring force of this spring and the associated lever arm with respect to the pivot axis (3), which is the length of the perpendicular from this axis to the rope ( 12) results, changed in such a way that the actuating torques corresponding to the respective angular positions are compensated. The influence of the friction between the loop (24) and the whip arm (5) is taken into account by a correspondingly higher preload of the spring (10).

In addition to using the cam (6) to change the restoring torque, this is used according to the invention to to actuate the release or blocking of the energy and / or operating equipment via the switching means (8). For this purpose, the switching means (8) is brought into contact with the cam disk (6) via its contour (25).

The storage holder (19) of the device according to the invention can be arranged in different angular positions via the externally accessible actuator (21) and the pivot axis (20) will. With a greater inclination against the horizontal, the effective proportion of the weight of the against the shelf holder supported instrument larger. The actuating torque resulting from the weight of the instrument in its rest position on the whip arm is therefore dependent on the adjustable inclination of the holder. The here required Adjustment of the restoring torque in the rest position of the whip arm takes place in an advantageous embodiment of the Subject of the invention by changing the bias the spring (1O), with the aid of the pin (11) which can be adjusted in an area (15) via the externally accessible actuator (14),

In a further advantageous embodiment of the subject matter of the invention, the shelf holder is on the contact surface with provided the instrument with a friction lining or made entirely of a material with a high coefficient of friction.

This measure reduces the above-mentioned influence of the effective instrument weight on the retraction and retraction device for the supply line.

Furthermore, it is advantageous to use the whip arms with to provide externally accessible adjustment means with which the mutual alignability of the rest position Whip arms <j at the same angle of inclination allows will. This can be done, for example, by a bolt (16) that can be screwed into the whip arm in the area of the hub (4). be realized, which cooperates with the housing-fixed stop {17}.

0301321/0318

Claims (1)

RITTER AG Killisfeldstrasse 62 - 7500 Karlsruhe 41 Dental treatment device Claims Dental treatment device with storage brackets for the instruments in the non-use position and holding and retraction devices for their supply lines in the form of a so-called whip assigned to each supply line, on whose whip arm a restoring torque that changes with its pivot angle acts, which is caused by the restoring force of a spring acting on the whip arm is hinged to the whip arm via a rope or the like and in which the switching means for releasing the energy and / or operating medium supply to the instrument are actuated after the associated whip arm has been pivoted through a certain angle,
characterized in that the respective whip arm (5) is assigned a cam disc (6) coaxial with its pivot axis (3) and non-rotatably connected to it,
b) the rope (12) or the like is attached to the cam disk (6), c) the rope (12) or the like. Depending on the angle of inclination of the whip arm (5) on the contour of the cam (6) more or less is wound up / 2 0 30021/0318 ORIGINAL INSPEGTEP the respective for the restoring torque from the Spring (10) generated restoring force is given by the decisive lever arm with the angle of inclination of the Whip arm variable length of the perpendicular from the pivot axis (3) to the respective point of the contour of the Cam disc (6) in which it is affected by the rope (12) or the like. e) in every inclined position of the whip arm (5) contact between the contour (25) of the switching means (8) and that of the cam (6). Dental treatment device according to claim 1, characterized in that the shelf brackets independently of each other and continuously at different angles of inclination against the Horizontal are fixable. Dental treatment device according to claim 1, characterized in that. '^ externally accessible adjusting means for changing the The spring is preloaded within certain limits, Dental treatment device according to claim 2, characterized in that '2 / externally accessible adjustment means for changing the angle of inclination of each shelf holder are available. 030021/0318 Dental treatment device according to claim 1, characterized in that ', · externally accessible adjustment means for the mutual alignment of the whip arms in the rest position available. Dental treatment device according to claim 1, characterized in that the storage brackets (19) on the contact surface with the instrument are provided with a friction lining. Dental treatment device according to claim 1, characterized in that the shelf brackets are made of a material with a high coefficient of friction. Q30Q21 / 0318 / 4