DE8804420U1 - Safety brake for a treatment device or diagnostic device attached to a C-arm - Google Patents

Description

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DORNIER MEDICAL TECHNOLOGY GMBH
8034 Germering

Reg. M 136 Gm

Safety brake for a treatment device or diagnostic device attached to a C-arm

The innovation concerns a treatment device or diagnostic device used in medical technology, which is attached to a C-arm so that it can move around the body of a patient lying on a treatment table, with the C-arm being mounted in a stationary support arm. To swivel the treatment device on the C-arm into the position desired by the doctor, a toothed belt is attached to two widely spaced points on the outside of the C-arm. The area within the attachment points mostly rests on the outer contour of the C-arm, while the belt part located inside the support arm is guided over two deflection rollers and a drive roller, with friction forces and drive being coordinated in such a way that the treatment device can be brought into any position with little effort and remains in this position.

This function is no longer available if the belt breaks. The treatment device then moves downwards in an uncontrolled manner until it impacts. This endangers the doctor and the patient and shock-sensitive parts of the treatment device can break. Hydraulic or electrical holding devices could catch the device, but such devices are not fail-safe .

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The aim of the innovation is to create a fail-safe device for devices of the type described above in the event of a belt break.

This task is solved in accordance with the innovation in that a deflection foil that pivots in the event of a belt break is mounted in a spring-loaded swing arm and a lever system connected to the swing arm releases a spring-loaded brake shoe attached to the stationary support arm, which presses against the outer contour of the C-arm.

Thanks to the new braking system, the treatment device is braked if the belt breaks without any further damage occurring; in individual cases, the treatment can even be continued and repairs are only carried out after the treatment has been completed. f

The innovation is explained in more detail below using figures |

explained. I

Showing: |

Fig. 1 shows the basic representation of a C-arm -

treatment device, I

Fig. 2 a partially sectioned side view of the \

braking system. j

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Fig. 1 shows a treatment device 2 which is attached to a C-arm 4. The therapy head or diagnostic head 6 and various adjustment devices 8 can be seen there. A patient 12 is located below the treatment device 2 on a patient couch 10 shown in outline.

The C-arm 4 is slidably mounted in a support arm 14. Multiple roller guides 16 are used for storage.

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which can be seen in Fig* 2. On the outer contour of the C-arm there is a toothed belt 18 which is guided over two deflection rollers 20, 22 and a drive roller 24 and, due to the belt tension and deflections, enables the treatment device to be easily moved and holds the treatment device 2 in place in any position.

The braking device that comes into effect when the belt breaks now works as follows:

The tension of the belt 18 presses the deflection roller 20, which is mounted on a swing arm 26, around the pivot point 28 towards the rear against a housing 29. The swing arm 26 is connected to a latch 32 by means of a rod 30. Latch 32 holds back a brake shoe 36 pre-tensioned by means of disc springs 34. The brake shoe 36 is provided with a friction lining 38 opposite the C-arm.

If the belt 18 breaks, the swing arm 26 is deflected forwards by means of springs 40. This causes the rod 30 to release the latch 32. The disc springs 34 now press the brake shoe 36 with the friction lining 38 against the C-arm 4. Falling through of the C-arm with the treatment device 2 is prevented.

31.03.1988
PaL/eh

Claims (1)

DORNIER MEDICAL TECHNOLOGY GMBH
8034 Germering Reg. M 136 Gm Claim for protection Treatment device or diagnostic device that is attached to a C-arm so that it can move around the body of a patient lying on a treatment table, the C-arm being mounted in a stationary tray arm, characterized in that a deflection roller (20) that pivots when the belt breaks is mounted in a spring-loaded swing arm (26) and a lever system (30) connected to the swing arm releases a spring-loaded brake shoe (36) that is attached to the stationary support arm (14) and presses against the outer contour of the C-arm (4). 31.03.1988
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