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CN-224220157-U - Medical assembly and medical device

CN224220157UCN 224220157 UCN224220157 UCN 224220157UCN-224220157-U

Abstract

The utility model provides a medical component and medical equipment, wherein the medical component comprises a moving part and a fixed part, a metal part is fixedly arranged on the moving part, a braking part is arranged on the fixed part, the braking part comprises a braking control circuit and an electromagnet, the electromagnet comprises a coil and a permanent magnet, when braking, the braking control circuit outputs a current signal of a first current path and drives the coil to generate a second magnetic field with the same magnetic field direction as the first magnetic field, when unlocking and releasing, the braking control circuit switches and outputs the current signal of the second current path and drives the coil to generate a third magnetic field opposite to the first magnetic field, and the first magnetic field is counteracted, so that the electromagnet is separated from the metal part and the moving part, the braking effect is achieved, the adsorption force and the braking capability of the metal part and the moving part can be enhanced by switching the current paths, the structure of the electromagnet is not required to be changed, the design cost is reduced, and the structure of the medical component is simplified.

Inventors

  • ZHANG XUFENG
  • SHI BO

Assignees

  • 上海联影医疗科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250312

Claims (11)

  1. 1. A medical assembly, comprising: A moving member (10), wherein a metal part (12) is fixedly arranged on the moving member (10) along the moving direction; A fixed member (20), wherein a braking part is arranged on the fixed member (20), the braking part comprises a braking control circuit (22) and an electromagnet (21) arranged along the movement direction, the electromagnet (21) comprises a coil (212) and a permanent magnet (211), the permanent magnet (211) is arranged opposite to the metal part (12), and the permanent magnet (211) generates a first magnetic field and adsorbs the metal part (12); The brake control circuit (22) is triggered by a brake signal output by the brake controller (1) to output a current signal of a first current path to the coil (212) so that the coil (212) generates a second magnetic field with the same magnetic field direction as the first magnetic field; Or triggering and outputting a current signal of a second current path to the coil (212) by a release signal output by the brake controller (1) so that the coil (212) generates a third magnetic field with a magnetic field direction opposite to the first magnetic field.
  2. 2. The medical assembly of claim 1, wherein the brake control circuit (22) comprises: A first switch switching circuit (221), wherein a first end of the first switch switching circuit (221) is connected with a positive power supply end (DC+), a second end of the first switch switching circuit (221) is connected with a negative power supply end (DC-), a third end of the first switch switching circuit (221) is connected with a first end of the coil (212), the first switch switching circuit (221) is triggered by a first switch signal to be communicated with the positive power supply end (DC+) and the first end of the coil (212), or is triggered by a second switch signal to be communicated with the negative power supply end (DC-) and the first end of the coil (212), and the current signal is output from the positive power supply end (DC+) and flows into the negative power supply end (DC-); A second switching circuit (222), a first end of the second switching circuit (222) is connected with the negative power supply end (DC), a second end of the second switching circuit (222) is connected with the positive power supply end (dc+), a third end of the second switching circuit (222) is connected with a second end of the coil (212), and the second switching circuit (222) is triggered by a third switching signal to be communicated with the negative power supply end (DC-) and the second end of the coil (212), or is triggered by a fourth switching signal to be communicated with the positive power supply end (dc+) and the second end of the coil (212); The switch control circuit (223) is respectively connected with the first switch switching circuit (221), the second switch switching circuit (222) and the brake controller (1), and the switch control circuit (223) is triggered by a brake signal output by the brake controller (1) to output the first switch signal and the third switch signal or is triggered by a release signal output by the brake controller (1) to output the second switch signal and the fourth switch signal.
  3. 3. The medical assembly of claim 2, wherein the first switch switching circuit (221) comprises a first single pole double throw switch (K1), the normally closed, normally open and common ends of the first single pole double throw switch (K1) constituting the first, second and third ends of the first switch switching circuit (221), respectively; The second switch switching circuit (222) comprises a second single-pole double-throw switch (K2), and a normally-closed end, a normally-open end and a common end of the second single-pole double-throw switch (K2) respectively form a first end, a second end and a third end of the second switch switching circuit (222).
  4. 4. The medical assembly according to claim 2, wherein the first switch switching circuit (221) comprises a first switch (Q1) and a second switch (Q2), the first end of the first switch (Q1) being connected to the positive power supply terminal (dc+), the first end of the second switch (Q2) being connected to the negative power supply terminal (DC-), the second end of the first switch (Q1), the second end of the second switch (Q2) being connected to the first end of the coil (212), the control end of the first switch (Q1) and the control end of the second switch (Q2) being connected to the first control end of the switch control circuit (223), the first switch (Q1) and the second switch (Q2) being of opposite switch types; The second switch switching circuit (222) comprises a third switch (Q3) and a fourth switch (Q4), wherein a first end of the third switch (Q3) is connected with the negative power supply end (DC), a first end of the fourth switch (Q4) is connected with the positive power supply end (DC+), a second end of the third switch (Q3), a second end of the fourth switch (Q4) and a second end of the coil (212) are connected, and a control end of the third switch (Q3) and a control end of the fourth switch (Q4) are connected with a second control end of the switch control circuit (223).
  5. 5. The medical assembly of any one of claims 2-4, wherein the switch control circuit (223) comprises: The controller (2232) is connected with the brake controller (1), and is triggered by a brake signal output by the brake controller (1) to output a first control signal or is triggered by a release signal output by the brake controller (1) to output a second control signal; And a switch driving circuit (2231) connected to the controller (2232), the first switch switching circuit (221), and the second switch switching circuit (222), respectively, wherein the switch driving circuit (2231) is configured to convert the first control signal into the first switch signal and the third switch signal, respectively, or convert the second control signal into the second switch signal and the fourth switch signal, respectively.
  6. 6. The medical assembly of claim 5, wherein the medical assembly further comprises: And the power output circuit (24) is respectively connected with the positive power supply end (DC+) and the negative power supply end (DC-) and is used for outputting the current signal.
  7. 7. The medical assembly of claim 6, wherein the power output circuit (24) is further connected to the controller (2232); The power output circuit (24) outputs the current signal with the corresponding magnitude by the current regulation signal output by the controller (2232).
  8. 8. The medical assembly of claim 1, wherein the brake control circuit (22) further comprises: and a freewheel circuit (25) connected to both ends of the coil (212), the freewheel circuit (25) providing a freewheel loop.
  9. 9. A medical assembly according to claim 8, wherein the freewheel circuit (25) comprises a freewheel resistor (R1), a first end of the freewheel resistor (R1) being connected to the first end of the coil (212), and a second end of the freewheel resistor (R1) being connected to the second end of the coil (212).
  10. 10. The medical assembly of claim 1, wherein a magnetic field strength of the third magnetic field is the same as a magnetic field strength of the first magnetic field or a difference between the magnetic field strength of the third magnetic field and the magnetic field strength of the first magnetic field is within a predetermined range, the first current path being opposite to the second current path.
  11. 11. A medical device comprising a medical assembly according to any one of claims 1 to 10.

Description

Medical assembly and medical device Technical Field The utility model belongs to the technical field of medical equipment, and particularly relates to a medical assembly and medical equipment. Background In the field of medical devices, an electromagnet is often used to perform the braking function of the moving part, the electromagnet generally consisting of a permanent magnet and a coil. When the equipment needs to be braked, the coil is not electrified, the attraction between the equipment and the moving part is realized by utilizing the magnetism of the permanent magnet, the braking is realized by friction, and the magnitude of the braking force and the magnetic field intensity of the permanent magnet are in positive correlation. When the equipment needs to release motion, the coil is electrified, and the coil generates a magnetic field with opposite direction and equal magnetic field strength with the permanent magnet and counteracts the magnetic field of the electromagnet, so that the electromagnet is separated from the moving part, and the effect of releasing the brake is achieved. In different applications, the electromagnet may be required to provide different braking forces, and the current method for improving the braking force mainly adopts the electromagnet with higher power and larger volume or increases the number of the electromagnets. But this brings problems of high cost, increased difficulty in mechanical design, increased control circuit, and the like. Disclosure of utility model The utility model aims to provide a medical assembly, which aims to solve the problems of high cost and complex structure of the traditional medical equipment when braking force is improved. A first aspect of an embodiment of the present utility model proposes a medical assembly comprising: A moving part, on which a metal part is fixedly arranged along the moving direction; The fixed part is provided with a braking part, the braking part comprises a braking control circuit and an electromagnet arranged along the moving direction, the electromagnet comprises a coil and a permanent magnet, the permanent magnet is arranged opposite to the metal part, and the permanent magnet generates a first magnetic field and adsorbs the metal part; The braking control circuit is triggered by a braking signal output by the braking controller to output a current signal of a first current path to the coil so that the coil generates a second magnetic field with the same magnetic field direction as the first magnetic field; or triggering and outputting a current signal of a second current path to the coil by a release signal output by the brake controller so that the coil generates a third magnetic field with the opposite magnetic field direction to the first magnetic field. Optionally, the brake control circuit includes: The first switch switching circuit is triggered by a first switch signal to be communicated with the positive power supply end and the first end of the coil, or triggered by a second switch signal to be communicated with the negative power supply end and the first end of the coil, and the current signal is output from the positive power supply end and flows into the negative power supply end; The first end of the second switch switching circuit is connected with the negative power supply end, the second end of the second switch switching circuit is connected with the positive power supply end, the third end of the second switch switching circuit is connected with the second end of the coil, and the second switch switching circuit is triggered by a third switch signal to be communicated with the negative power supply end and the second end of the coil, or triggered by a fourth switch signal to be communicated with the positive power supply end and the second end of the coil; the switch control circuit is respectively connected with the first switch switching circuit, the second switch switching circuit and the brake controller, and is triggered by a brake signal output by the brake controller to output the first switch signal and the third switch signal or is triggered by a release signal output by the brake controller to output the second switch signal and the fourth switch signal. Optionally, the first switch switching circuit includes a first single-pole double-throw switch, and a normally-closed end, a normally-open end and a common end of the first single-pole double-throw switch respectively form a first end, a second end and a third end of the first switch switching circuit; The second switch switching circuit comprises a second single-pole double-throw switch, and a normally-closed end, a normally-open end and a common end of the second single-pole double-throw switch respectively form a first end, a second end and a third end of the second switch switching circuit. Optionally, the first switch switching circuit includes a first switch and a second switch, a first end of the first switch is connected with the