DE3144855A1 - Control device for a dental unit - Google Patents

Abstract

This unit contains several handpieces (31...n), which can be taken from storage devices (11...n) and which are supplied via control members (51...n) with resources, the values of which can be changed, electronic memories (81...n) for storing the operating values, an address coder (7) for selecting the memories as a function of the removal of the handpieces, and a control unit (12) for the read-out cycle of the memories (8). So that the previous operating values can be recovered without having to store the handpieces in and remove them again from the associated storing devices when the operating values have been manually changed, it is proposed to connect to the address coder (7) a logic circuit (11) with a manual key (18), the operation of which activates the read-out cycle of the memories (8). <IMAGE>

Description

Control device for a dental device

The invention relates to a control device for a dental Device, with several, tied to supply lines, and from storage devices removable handpieces whose values can be changed via control elements Resources are supplied, with electronic memories for storage operating values assigned to the handpieces, with address encoder for control the memory as a function of the removal of a handpiece, with a control unit for the readout cycle of the memory, as well as with input lines for manual changes the operating values stored in the memories.

In a known device of this type, the control device is constructed so that the memory when removing a handpiece from the associated Storage device is read out. The disadvantage here is that with a manual Change in the operating values, e.g. by increasing or reducing the speed or the intensity of a drive assigned to the handpiece, a response gain the previous operating values only by putting down and removing the handpiece again in or

from the associated storage device, is possible, or in the one The operating values can be changed back manually by means of keying.

The operation of such a device is relatively cumbersome and means for the user a job> Jerschwernis. In addition, because of the frequent Remove and put down the handpieces the parts, especially the supply lines, subject to increased wear.

The present invention eliminates the stated disadvantages by that to control the control unit for the readout cycle of the memory to the Address coder a logic circuit is connected, which a manually operable Switching element, preferably a button, contains, upon actuation of the readout cycle the memory is activated. It is advantageous if the logic circuit is constructed in this way is that when the handpieces are stored and the key is pressed, the memory is read out prevented, however, when the handpiece is removed and the button is pressed Activation signal (trigger pulse) is given to the control unit.

An embodiment of the invention is explained in more detail with reference to the drawing explained: Contains a dental device not shown in the drawing several storage devices 11 n. For connected to supply lines 21..n Handpieces The handpieces 3 are via supply lines 41 n from a several control members 51 n n contained supply unit with the corresponding Supplies (air, water, electricity, etc.).

The control members 5 can in the case of the supply of air and / or Water valves, in the case of the supply line of electric current a potentiometer that controls the speed or power of a drive motor the direction of rotation of the motor controlling relay or similar. The control links 51 are in a known manner with the associated, not shown in the figure Sources of supply for the equipment connected.

The storage devices 11 ..n have switching contacts that are electrically are connected to a latch circuit 6, which ensures that, if a handpiece has been removed, the other handpieces remain locked when they are removed, i.e. the supply of resources is blocked. To control the memory 8, in which the operating values for the handpieces 3 can be stored an address encoder 7 connected to the interlocking circuit 6 is provided. The address encoder 7 places one in each case when a handpiece is removed from its storage device Address to the associated memory 8.

With 9 buffers are designated, in which the storage values can be stored from the memories 8 and changed by means of the input line 10 can0 The address encoder 7 is connected to a control unit via a circuit arrangement 11 12 connected for the readout cycle of the memory 8. With the control unit 12 can the stored values are read out from the memories 8.

The circuit arrangement 11 consists essentially of a gate logic with two OR gates 13, 14, one AND gate 15, two differentiators. 16, 17 and a switching element (button 18).

The address lines of the memory 8 for the operating values are dem OR gate 13 supplied. About the differentiator 16 and the OR gate 14 is the control unit 12 is triggered for the read-out cycle of the memory 8.

The differentiator is required to prevent a static signal is present at one input of the OR gate 14.

If a handpiece is removed from its holder, the circuit arrangement 11 a short control pulse is given to the unit 12, with the result that it is stored Operating value is read out for this handpiece.

When the button 18 is actuated, the differentiating element 17 turns on Another trigger pulse is generated, which reactivates the readout cycle. The memory 8 can be used at any time by pressing the pulse button 8 often read out.

The AND gate 15 prevents the memory from being read out when it is actuated Key 18 and with the handpieces in place.

With the differentiating element 17, even when the button is constantly pressed or blocked button 18, the control unit 12 can be released for the readout cycle.

Blank page

Claims (2)

Claims 1. Control device for a dental device, with several, tied to supply lines (21 n) and composed of storage devices (11 .. n) removable handpieces (31,), which have control members (51..n) in their Values changeable resources are supplied, with electronic memories (81..n) for storing the operating values, with address encoder (7) for navigation the memory depending on the removal of the handpieces, with a control unit (12) for the readout cycle of the memory (8), as well as with input lines (10,) for manual change of the operating values stored in the memories (8), d a d u r c h g e k e n n n z e i c h n e t that for controlling the control unit (12) a logic circuit for the read-out cycle of the memory (8) to the address encoder (7) (11) is switched on, which is a manually operable switching element, preferably contains a key (18) which, when pressed, starts the read-out cycle of the memory (8) is activated. 2. Control device according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the logic circuit (11) is designed so that when stored Handpieces (3) and pressing the button (18) prevents the memory from being read out, on the other hand, when the handpiece is removed and the button (18) is pressed, an activation signal is generated (Trigger pulse) is given to the control unit (12).