Medical assembly and medical device
By switching the current path in medical devices to control the direction of the electromagnet's magnetic field, the problems of high cost and complex structure in increasing the braking force of traditional medical devices are solved, achieving more efficient braking force control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI UNITED IMAGING HEALTHCARE
- Filing Date
- 2025-03-12
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional medical devices suffer from high costs and complex structures when trying to improve braking force.
By setting metal components on the moving parts and using a braking control circuit to switch the current path, the coil of the electromagnet generates a magnetic field that is the same as or opposite to the magnetic field of the permanent magnet, thereby enhancing or canceling the attraction force, thus achieving braking and releasing the brake.
It improves braking capability, reduces design costs, simplifies the structure, and does not require changes to the structure and number of electromagnets.
Smart Images
Figure CN224220157U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical equipment technology, and in particular relates to a medical component and a medical device. Background Technology
[0002] In the field of medical equipment, electromagnets are commonly used to brake moving parts. An electromagnet typically consists of a permanent magnet and a coil. When braking is needed, the coil is de-energized, and the permanent magnet attracts the moving part, using friction to achieve braking. The braking force is directly proportional to the magnetic field strength of the permanent magnet. When the device needs to release its movement, the coil is energized, generating a magnetic field with the opposite direction and equal strength to the permanent magnet's magnetic field. This magnetic field cancels out the electromagnet's magnetic field, causing the electromagnet to disengage from the moving part and releasing the brakes.
[0003] In different applications, electromagnets may be required to provide different braking forces. Currently, the main methods to increase braking force are to use electromagnets with higher power and larger size, or to increase the number of electromagnets. However, this also brings problems such as higher costs, increased difficulty in mechanical design, and more control circuits. Utility Model Content
[0004] The purpose of this invention is to provide a medical component that addresses the problems of high cost and complex structure in traditional medical devices when improving braking force.
[0005] A first aspect of this utility model provides a medical component, comprising:
[0006] A moving component, wherein a metal part is fixedly disposed on the moving component along the direction of movement;
[0007] A fixing component is provided with a braking part, the braking part including a braking control circuit and an electromagnet arranged along the direction of movement, the electromagnet including a coil and a permanent magnet, the permanent magnet being arranged opposite the metal part, the permanent magnet generating a first magnetic field and attracting the metal part;
[0008] The braking control circuit, triggered by the braking signal output by the braking controller, outputs a current signal through the 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.
[0009] Alternatively, the release signal output by the brake controller may trigger the output of a current signal through a second current path to the coil, thereby causing the coil to generate a third magnetic field with a magnetic field direction opposite to that of the first magnetic field.
[0010] Optionally, the braking control circuit includes:
[0011] A first switching circuit has a first terminal connected to a positive power supply terminal, a second terminal connected to a negative power supply terminal, and a third terminal connected to a first terminal of the coil. The first switching circuit is triggered by a first switching signal to connect the positive power supply terminal and the first terminal of the coil, or triggered by a second switching signal to connect the negative power supply terminal and the first terminal of the coil. The current signal is output from the positive power supply terminal and flows into the negative power supply terminal.
[0012] The second switching circuit has a first terminal connected to the negative power supply terminal, a second terminal connected to the positive power supply terminal, and a third terminal connected to the second terminal of the coil. The second switching circuit is triggered by a third switching signal to connect the negative power supply terminal and the second terminal of the coil, or is triggered by a fourth switching signal to connect the positive power supply terminal and the second terminal of the coil.
[0013] A switch control circuit is connected to the first switch switching circuit, the second switch switching circuit, and the brake controller, respectively. The switch control circuit is triggered by the brake signal output by the brake controller to output the first switch signal and the third switch signal, or triggered by the release signal output by the brake controller to output the second switch signal and the fourth switch signal.
[0014] Optionally, the first switch switching circuit includes a first single-pole double-throw switch, wherein the normally closed terminal, normally open terminal, and common terminal of the first single-pole double-throw switch constitute the first terminal, the second terminal, and the third terminal of the first switch switching circuit, respectively.
[0015] The second switch switching circuit includes a second single-pole double-throw switch. The normally closed terminal, normally open terminal, and common terminal of the second single-pole double-throw switch constitute the first terminal, the second terminal, and the third terminal of the second switch switching circuit, respectively.
[0016] Optionally, the first switch switching circuit includes a first switch and a second switch. The first end of the first switch is connected to the positive power supply terminal, the first end of the second switch is connected to the negative power supply terminal, the second end of the first switch, the second end of the second switch and the first end of the coil are connected, the control terminals of the first switch and the control terminals of the second switch are connected to the first control terminal of the switch control circuit, and the first switch and the second switch are of opposite switch type.
[0017] The second switch switching circuit includes a third switch and a fourth switch. The first end of the third switch is connected to the negative power supply terminal, the first end of the fourth switch is connected to the positive power supply terminal, the second ends of the third switch, the second ends of the fourth switch and the second end of the coil are connected, and the control terminals of the third switch and the fourth switch are connected to the second control terminal of the switch control circuit.
[0018] Optionally, the switch control circuit includes:
[0019] The controller is connected to the brake controller and is triggered by the brake signal output by the brake controller to output a first control signal, or triggered by the release signal output by the brake controller to output a second control signal.
[0020] A switch driving circuit is connected to the controller, the first switch switching circuit and the second switch switching circuit respectively. The switch driving circuit is used to convert the first control signal into the first switch signal and the third switch signal respectively, or to convert the second control signal into the second switch signal and the fourth switch signal respectively.
[0021] Optionally, the medical component further includes:
[0022] The power output circuit is connected to the positive power supply terminal and the negative power supply terminal respectively, and is used to output the current signal.
[0023] Optionally, the power output circuit is also connected to the controller;
[0024] The power output circuit outputs a current signal of a corresponding magnitude based on the current adjustment signal output by the controller.
[0025] Optionally, the braking control circuit further includes:
[0026] A freewheeling circuit is connected to both ends of the coil and is used to provide a freewheeling loop.
[0027] Optionally, the freewheeling circuit includes a freewheeling resistor, the first end of which is connected to the first end of the coil, and the second end of which is connected to the second end of the coil.
[0028] Optionally, the magnetic field strength of the third magnetic field is the same as that of the first magnetic field, or the difference between the magnetic field strength of the third magnetic field and the magnetic field strength of the first magnetic field is within a preset range, and the direction of the first current path is opposite to that of the second current path.
[0029] A second aspect of this utility model provides a medical device comprising the medical components described above.
[0030] The beneficial effects of this utility model embodiment compared with the prior art are as follows: The above-mentioned medical component includes a moving part and a fixed part. The moving part can move along the direction of movement on the fixed part. A metal part is fixedly disposed on the moving part. A braking part is disposed on the fixed part. The braking part includes a braking control circuit and an electromagnet. The electromagnet includes a coil and a permanent magnet. The permanent magnet generates a first magnetic field and attracts the metal part. When braking, the braking control circuit outputs a current signal of the first current path and drives the coil to generate a second magnetic field with the same magnetic field direction as the first magnetic field, thereby enhancing the attraction force and braking ability of the metal part and the moving part. When unlocking and releasing, the braking control circuit switches to output a current signal of the second current path and drives the coil to generate a third magnetic field with a magnetic field opposite to the first magnetic field, canceling the first magnetic field, thereby causing the electromagnet to disengage from the metal part and the moving part, achieving the effect of releasing the braking. By switching the current path, the braking ability can be improved, and there is no need to change the structure and number of electromagnets, reducing the design cost and simplifying the structure of the medical component. Attached Figure Description
[0031] Figure 1 Example schematic diagram of the medical component provided in the embodiment of this utility model;
[0032] Figure 2 A partially enlarged schematic diagram of the metal part and the electromagnet provided in an embodiment of this utility model;
[0033] Figure 3 A schematic diagram of a first module of a medical component provided in an embodiment of this utility model;
[0034] Figure 4 A schematic diagram of a second module of the medical component provided in an embodiment of this utility model;
[0035] Figure 5 A schematic diagram of a third module of the medical component provided in an embodiment of this utility model;
[0036] Figure 6 A schematic diagram of the fourth module of the medical component provided in this embodiment of the present utility model;
[0037] Figure 7 A first circuit diagram of a medical component provided in an embodiment of this utility model;
[0038] Figure 8 A second circuit diagram of a medical component provided in an embodiment of this utility model;
[0039] Figure 9 A schematic diagram of a fifth module of the medical component provided in this embodiment of the present utility model;
[0040] Figure 10A schematic diagram of a sixth module of the medical component provided in this embodiment of the present utility model;
[0041] Figure 11 A schematic diagram of the seventh module of the medical component provided in this embodiment of the present utility model;
[0042] Figure 12 A schematic diagram of the eighth module of the medical component provided in this embodiment of the utility model;
[0043] Figure 13 A third circuit diagram of the medical component provided in an embodiment of this utility model.
[0044] The figures in the diagram are labeled as follows:
[0045] 1. Brake controller; 10. Moving parts; 20. Fixed parts; 11. Guide groove; 12. Metal part; 21. Electromagnet; 211. Permanent magnet; 212. Coil; 23. Fixed part; 22. Brake control circuit; 221. First switch switching circuit; 222. Second switch switching circuit; 223. Switch control circuit; 2231. Switch drive circuit; 2232. Controller; 24. Power output circuit; 25. Freewheeling circuit;
[0046] DC+, positive power supply terminal; DC-, negative power supply terminal; K1, first single-pole double-throw switch; K2, second single-pole double-throw switch; Q1, first switch; Q2, second switch; Q3, third switch; Q4, fourth switch; R1, freewheeling resistor;
[0047] Y1, first direction; Y2, second direction; X1, third direction; X2, fourth direction; PWM, current regulation signal. Detailed Implementation
[0048] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0049] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0050] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0052] The first aspect of this utility model provides a medical component, which may be a floating bed panel component, a lifting column component, a lifting bed component, etc. in medical equipment.
[0053] Among them, such as Figures 1 to 4 As shown, the medical components include:
[0054] A moving part 10, on which a metal part 12 is fixedly disposed along the direction of movement;
[0055] A fixing component 20 is provided with a braking part, which includes a braking control circuit 22 and an electromagnet 21 arranged along the direction of motion. The electromagnet 21 includes a coil 212 and a permanent magnet 211. The permanent magnet 211 is arranged opposite the metal part 12 and generates a first magnetic field to attract the metal part 12.
[0056] The braking control circuit 22 is triggered by the braking signal output by the braking controller 1 to output a current signal of the 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.
[0057] Alternatively, the release signal output by the brake controller 1 may trigger the output of a current signal through the second current path to the coil 212, thereby causing the coil 212 to generate a third magnetic field with a magnetic field direction opposite to that of the first magnetic field.
[0058] In this embodiment, the moving part 10 can move along the direction of movement on the fixed part 20, for example... Figure 1 As shown, the moving part 10 is the bed panel, and the fixed part 20 is the bed base. The bed panel can move back and forth or left and right along the direction of movement, for example, it can move left and right along the third direction X1 and the fourth direction X2.
[0059] The moving component 10 is fixedly provided with a metal part 12. The metal part 12 can be fastened with screws or integrally formed with the moving component 10 and fixedly provided on the moving component 10. The metal part 12 can be laid out along the direction of movement or spaced apart, and the specific arrangement is not limited. The fixed component 20 is provided with an electromagnet 21 corresponding to the metal part 12. The electromagnet 21 can attract or release the metal part 12, thereby braking the moving component 10 to stop its movement or releasing the braking of the moving component 10. The metal part 12 and the electromagnet 21 can be made into strips, planes, etc., and the specific shape is not limited.
[0060] The moving part 10 may also be provided with a corresponding guide groove 11, the metal part 12 is fixedly disposed inside the guide groove 11, the electromagnet 21 is disposed inside the guide groove 11 and spaced apart from the metal part 12, and correspondingly, the fixing part 20 may also be provided with a corresponding fixing part 23, which is used to fix the electromagnet 21.
[0061] The braking control circuit 22 is connected to the coil 212 of the electromagnet 21 via a power line. The braking control circuit 22 can be set in a corresponding position in the fixed component 20, for example, in the bed base.
[0062] The brake controller 1 can be mounted on the fixed component 20 or set separately from the fixed component 20. The brake controller 1 and the brake control circuit 22 can be connected via a signal line or wirelessly. The brake controller 1 can be a remote control, brake switch, etc. The brake switch can be a push-button switch or a multi-position switch.
[0063] The brake controller 1 outputs a braking signal or a release signal based on the trigger action, or, when the brake controller 1 is not triggered, the brake controller 1 does not output a signal.
[0064] When the brake controller 1 is not triggered, the brake control circuit 22 does not receive a brake signal or release signal. At this time, the brake control circuit 22 does not output a current signal to the coil 212, the coil 212 does not generate a magnetic field, the permanent magnet 211 provides a first magnetic field in the first direction Y1 and attracts the metal part 12 and the moving part 10, providing a small braking force.
[0065] like Figure 3As shown, when the fixed component 20 needs to provide a larger braking force, the brake controller 1 is triggered to output a braking signal. Under the trigger of the braking signal, the brake control circuit 22 outputs a current signal of the first current path, that is, the current signal flows in from the first end of the coil 212 and flows out from the second end of the coil 212. Based on the right-hand screw rule, the coil 212 generates a second magnetic field in the first direction Y1. The magnetic force of the second magnetic field is superimposed on the magnetic force of the first magnetic field, and provides a greater attraction force to attract the metal part 12 and the moving part 10, thereby improving the braking force. Moreover, there is no need to change the structure and number of electromagnets 21, which reduces the design cost and simplifies the structure of the medical component.
[0066] And such as Figure 4 As shown, when it is necessary to release the metal part 12 and the moving part 10, the brake controller 1 is triggered again and switches to output a release signal. The brake control circuit 22 is triggered to output a current signal of the second current path under the trigger of the release signal. The direction of the first current path is opposite to that of the second current path, that is, the current signal flows in from the second end of the coil 212 and flows out from the first end of the coil 212. Based on the right-hand screw rule, the coil 212 generates a third magnetic field in the second direction Y2. The magnetic force of the third magnetic field cancels out that of the first magnetic field. The electromagnet 21 has no attraction force or a small attraction force on the metal part 12, so that the electromagnet 21 can be separated from the metal part 12 and the moving part 10, thereby achieving the effect of releasing the brake.
[0067] The braking signal and the release signal can be high and low level signals of opposite polarity, or voltage signals of other different voltage levels; the specific signal type is not limited.
[0068] The current signal in the first current path and the current signal in the second current path can be equal or unequal. For example, when the magnitudes of the current signals in the first and second current paths are equal, when the coil 212 is initially not energized, the permanent magnet 211 provides a 5N attraction force. When the current signal from the first current path is provided, the attraction force generated by the coil 212 is also 5N. Through magnetic superposition, a 10N attraction force can be applied. When the current signal from the second current path is provided, the attraction force generated by the coil 212 is -5N. The magnetic fields cancel each other out, resulting in a 0N attraction force. That is, the electromagnet 21 has no attraction force on the metal part 12, causing the electromagnet 21 to disengage from the metal part 12 and the moving part 10, thus achieving the effect of releasing the brake.
[0069] Alternatively, when the current signal in the first current path is not equal to the current signal in the second current path, when the coil 212 is initially not energized, the permanent magnet 211 provides a 5N attraction force. When the current signal in the first current path is provided, the attraction force generated by the coil 212 can be 3N. Through magnetic superposition, an 8N attraction force can be applied, which can also achieve the effect of increasing the attraction force. When the current signal in the second current path is provided, the attraction force generated by the coil 212 can be -5N. The magnetic fields cancel each other out, producing a 0N attraction force, that is, the electromagnet 21 has no attraction force on the metal part 12, causing the electromagnet 21 to disengage from the metal part 12 and the moving part 10, thereby achieving the effect of releasing the brake.
[0070] Similarly, the magnitudes of the first magnetic field, the second magnetic field, and the third magnetic field may be equal or unequal. In an optional embodiment, the magnetic field strength of the third magnetic field is the same as that of the first magnetic field, or the difference between the magnetic field strength of the third magnetic field and that of the first magnetic field is within a preset range.
[0071] When the magnetic field strength of the third magnetic field is the same as that of the first magnetic field, the magnetic forces of the third magnetic field and the first magnetic field completely cancel each other out, and the electromagnet 21 has no attraction force on the metal part 12, so that the electromagnet 21 can be separated from the metal part 12 and the moving part 10, thereby achieving the effect of releasing the brake.
[0072] When the difference between the magnetic field strength of the third magnetic field and the magnetic field strength of the first magnetic field is within a preset range, that is, when the magnetic field strength of the third magnetic field is slightly less than that of the first magnetic field, the magnetic force of the third magnetic field cancels out most of the magnetic force of the first magnetic field. The electromagnet 21 still retains a small attraction force on the metal part 12. The electromagnet 21, the metal part 12 and the moving part 10 can still achieve a small energy attraction braking, so that the moving part 10 will not completely lose control, making the moving part 10 controllable. When a slight external force is applied, the moving part 10 can still be pushed to separate from the electromagnet, and the braking effect can be achieved.
[0073] The preset difference value can be set according to the requirements. When the preset difference value is set too large, it may be necessary to apply a large external force to push the moving part 10, resulting in the loss of the braking release effect. In an optional embodiment, the ratio of the magnetic field strength of the third magnetic field to the magnetic field strength of the first magnetic field is between 95% and 100%. Correspondingly, the preset difference value between the magnetic field strength of the third magnetic field and the magnetic field strength of the first magnetic field is between 0 and 5%. By forming a preset difference value between the magnetic field strengths of the first magnetic field and the third magnetic field, the electromagnet 21 can still achieve a small amount of energy adsorption braking between the metal part 12 and the moving part 10, so that the moving part 10 does not completely lose control and the moving part 10 is in a controllable state.
[0074] The braking control circuit 22 can employ a corresponding switching switch, power supply circuit, etc., as shown in an optional embodiment, such as... Figure 5 and Figure 6 As shown, the braking control circuit 22 includes:
[0075] The first switch circuit 221 has a first terminal connected to the positive power supply terminal DC+, a second terminal connected to the negative power supply terminal DC-, and a third terminal connected to the first terminal of the coil 212. The first switch circuit 221 is triggered by a first switch signal to connect the positive power supply terminal DC+ and the first terminal of the coil 212, or it is triggered by a second switch signal to connect the negative power supply terminal DC- and the first terminal of the coil 212. The current signal is output from the positive power supply terminal DC+ and flows into the negative power supply terminal DC-.
[0076] The second switch circuit 222 has a first terminal connected to the negative power supply terminal DC-, a second terminal connected to the positive power supply terminal DC+, and a third terminal connected to the second terminal of the coil 212. The second switch circuit 222 can be triggered by a third switch signal to connect the negative power supply terminal DC- and the second terminal of the coil 212, or it can be triggered by a fourth switch signal to connect the positive power supply terminal DC+ and the second terminal of the coil 212.
[0077] The switch control circuit 223 is connected to the first switch switching circuit 221, the second switch switching circuit 222 and the brake controller 1 respectively. The switch control circuit 223 is triggered by the brake signal output by the brake controller 1 to output the first switch signal and the third switch signal, or triggered by the release signal output by the brake controller 1 to output the second switch signal and the fourth switch signal.
[0078] In this embodiment, when the brake controller 1 is not triggered, the switch control circuit 223 does not receive a braking signal or a release signal. At this time, the switch control circuit 223 does not output a switch signal. Correspondingly, the first switch switching circuit 221 and the second switch switching circuit 222 can remain in the off state. There is no current signal to the coil 212, and the coil 212 does not generate a magnetic field. The permanent magnet 211 provides a first magnetic field in the first direction Y1 and attracts the metal part 12 and the moving part 10, providing a small braking force.
[0079] like Figure 5As shown, when the fixed component 20 needs to provide a larger braking force, the brake controller 1 is triggered to output a braking signal. Under the trigger of the braking signal, the switch control circuit 223 outputs a first switch signal to the first switch switching circuit 221 and a third switch signal to the second switch switching circuit 222. The first switch switching circuit 221 switches the connection between the positive power supply terminal DC+ and the first end of the coil 212, and the second switch switching circuit 222 switches the connection between the negative power supply terminal DC- and the second end of the coil 212. The positive power supply terminal DC+, the first switch switching circuit 221, the coil 212, the second switch switching circuit 222 and the negative power supply terminal DC- form a first current path and output a current signal to the coil 212. Based on the right-hand screw rule, the coil 212 generates a second magnetic field in the first direction Y1. The magnetic force of the second magnetic field is superimposed on the magnetic force of the first magnetic field and provides a greater attraction force to attract the metal part 12 and the moving part 10, thereby improving the braking force. Moreover, there is no need to change the structure and number of electromagnets 21, which reduces the design cost and simplifies the structure of the medical component.
[0080] And such as Figure 6 As shown, when it is necessary to release the metal part 12 and the moving part 10, the brake controller 1 is triggered again and switches the output release signal. The switch control circuit 223 triggers the output of the second switch signal to the first switch switching circuit 221 and the output of the fourth switch signal to the second switch switching circuit 222. The first switch switching circuit 221 switches the connection between the negative power supply terminal DC- and the first end of the coil 212. The second switch switching circuit 222 switches the connection between the positive power supply terminal DC+ and the second end of the coil 212. The positive power supply terminal DC+, the second switch switching circuit 222, the coil 212, the first switch switching circuit 221 and the negative power supply terminal DC- form a second current path and output a current signal to the coil 212. Based on the right-hand screw rule, the coil 212 generates a third magnetic field in the second direction Y2. The magnetic force of the third magnetic field cancels out the magnetic force of the first magnetic field. The electromagnet 21 has no attraction force or a small attraction force on the metal part 12, so that the electromagnet 21 is disengaged from the metal part 12 and the moving part 10, thereby achieving the effect of releasing the brake.
[0081] The first and second switching signals can be level signals of opposite polarity or voltage signals with different voltage magnitudes; the specific signal type is not limited.
[0082] Similarly, the third and fourth switch signals can be level signals of opposite polarity or voltage signals with different voltage magnitudes; the specific signal type is not limited.
[0083] The first switch switching circuit 221 and the second switch switching circuit 222 can employ multiple controllable switching devices or switchover switches with different switching directions. In an optional embodiment, such as... Figure 7As shown, the first switch switching circuit 221 includes a first single-pole double-throw switch K1. The normally closed terminal, normally open terminal and common terminal of the first single-pole double-throw switch K1 respectively constitute the first terminal, the second terminal and the third terminal of the first switch switching circuit 221.
[0084] The second switch switching circuit 222 includes a second single-pole double-throw switch K2. The normally closed terminal, normally open terminal, and common terminal of the second single-pole double-throw switch K2 respectively constitute the first terminal, the second terminal, and the third terminal of the second switch switching circuit 222.
[0085] In this embodiment, when a single-pole double-throw switch is used to form the switching circuit, the braking control circuit 22 can operate in two states: providing large braking force and no braking force.
[0086] When the fixed component 20 needs to provide a larger braking force, the brake controller 1 is triggered to output a braking signal. Under the trigger of the braking signal, the switch control circuit 223 outputs a first switch signal to the first single-pole double-throw switch K1 and a third switch signal to the second single-pole double-throw switch K2. The first single-pole double-throw switch K1 switches to connect the positive power supply terminal DC+ and the first end of the coil 212, and the second single-pole double-throw switch K2 switches to connect the negative power supply terminal DC- and the second end of the coil 212. The positive power supply terminal DC+, the first single-pole double-throw switch K1, the coil 212, the second single-pole double-throw switch K2 and the negative power supply terminal DC- form a first current path and output a current signal to the coil 212. Based on the right-hand screw rule, the coil 212 generates a second magnetic field in the first direction Y1. The magnetic force of the second magnetic field is superimposed on the magnetic force of the first magnetic field and provides a greater attraction force to attract the metal part 12 and the moving part 10, which improves the braking force. Moreover, there is no need to change the structure and number of electromagnets 21, which reduces the design cost and simplifies the structure of the medical component.
[0087] When it is necessary to release the metal part 12 and the moving part 10, the brake controller 1 is triggered again and switches the output release signal. The switch control circuit 223 triggers the output of the second switch signal to the first single-pole double-throw switch K1 and the output of the fourth switch signal to the second single-pole double-throw switch K2. The first single-pole double-throw switch K1 switches to connect the negative power supply terminal DC- and the first terminal of the coil 212. The second single-pole double-throw switch K2 switches to connect the positive power supply terminal DC+ and the second terminal of the coil 212. The positive power supply terminal DC+, the second single-pole double-throw switch K2, the coil 212, the first single-pole double-throw switch K1 and the negative power supply terminal DC- form a second current path and output a current signal to the coil 212. Based on the right-hand screw rule, the coil 212 generates a third magnetic field in the second direction Y2. The magnetic force of the third magnetic field cancels out the magnetic force of the first magnetic field. The electromagnet 21 has no attraction force or a small attraction force on the metal part 12, so that the electromagnet 21 is disengaged from the metal part 12 and the moving part 10, thereby achieving the effect of releasing the brake.
[0088] In another alternative embodiment, the switch switching circuit may also consist of multiple switches, such as... Figure 8 As shown, the first switch switching circuit 221 includes a first switch Q1 and a second switch Q2. The first end of the first switch Q1 is connected to the positive power supply terminal DC+, and the first end of the second switch Q2 is connected to the negative power supply terminal DC-. The second ends of the first switch Q1 and the second switch Q2 are connected to the first end of the coil 212. The control terminals of the first switch Q1 and the second switch Q2 are connected to the first control terminal of the switch control circuit 223. The first switch Q1 and the second switch Q2 are opposite switches.
[0089] The second switch switching circuit 222 includes a third switch Q3 and a fourth switch Q4. The first end of the third switch Q3 is connected to the negative power supply terminal DC-, and the first end of the fourth switch Q4 is connected to the positive power supply terminal DC+. The second ends of the third switch Q3 and the fourth switch Q4 are connected to the second end of the coil 212. The control terminals of the third switch Q3 and the fourth switch Q4 are connected to the second control terminal of the switch control circuit 223.
[0090] In this embodiment, when multiple switches are used to form a switch switching circuit, the braking control circuit 22 can operate in three states: providing small braking force, large braking force, and no braking force.
[0091] When the brake controller 1 is not triggered, the switch control circuit 223 does not receive a braking signal or a release signal. At this time, the switch control circuit 223 has no switch signal output, and the first switch Q1, the second switch Q2, the third switch Q3 and the fourth switch Q4 remain in the off state, and no current signal is output to the coil 212. The coil 212 does not generate a magnetic field, and the permanent magnet 211 provides a first magnetic field in the first direction Y1 and attracts the metal part 12 and the moving part 10, providing a small braking force.
[0092] When the fixed component 20 needs to provide a larger braking force, the brake controller 1 is triggered to output a braking signal. Under the trigger of the braking signal, the switch control circuit 223 switches the output of the first switch signal to the first switch switching circuit 221 and the output of the third switch signal to the second switch switching circuit 222. The first switch Q1 and the third switch Q3 are triggered to conduct, and the second switch Q2 and the fourth switch Q4 are triggered to turn off. The positive power supply terminal DC+, the first switch Q1, the coil 212, the third switch Q3 and the negative power supply terminal DC- form a first current path and output a current signal to the coil 212. Based on the right-hand screw rule, the coil 212 generates a second magnetic field in the first direction Y1. The magnetic force of the second magnetic field is superimposed on that of the first magnetic field, and provides a greater attraction force to attract the metal part 12 and the moving part 10, thereby improving the braking force. Moreover, there is no need to change the structure and number of electromagnets 21, which reduces the design cost and simplifies the structure of the medical component.
[0093] When it is necessary to release the metal part 12 and the moving part 10, the brake controller 1 is triggered again and switches the output release signal. The switch control circuit 223 triggers the output of the second switch signal to the first switch switching circuit 221 and the output of the fourth switch signal to the second switch switching circuit 222. The second switch Q2 and the fourth switch Q4 are triggered to conduct, and the first switch Q1 and the third switch Q3 are triggered to turn off. The positive power supply terminal DC+, the fourth switch Q4, the coil 212, the second switch Q2 and the negative power supply terminal DC- form a second current path and output a current signal to the coil 212. Based on the right-hand screw rule, the coil 212 generates a third magnetic field in the second direction Y2. The magnetic force of the third magnetic field cancels out the magnetic force of the first magnetic field. The electromagnet 21 has no attraction force or a small attraction force on the metal part 12, so that the electromagnet 21 is disengaged from the metal part 12 and the moving part 10, thereby achieving the effect of releasing the brake.
[0094] In this configuration, the first switch Q1 and the second switch Q2 are switching devices of opposite types, and the third switch Q3 and the fourth switch Q4 are switching devices of opposite types. For example, the first switch Q1 and the third switch Q3 can be NMOS transistors, the second switch Q2 and the fourth switch Q4 can be PMOS transistors, the first switch signal and the third switch signal can be high-level signals, and the second switch signal and the fourth switch signal can be low-level signals.
[0095] The switch control circuit 223 can adopt a controller 2232, processor, or other similar structures. In order to meet the driving requirements of the first switch switching circuit 221 and the second switch switching circuit 222 and improve the switch driving capability, in an optional embodiment, such as... Figure 9 As shown, the switch control circuit 223 includes:
[0096] The controller 2232 is connected to the brake controller 1 and is triggered by the brake signal output by the brake controller 1 to output a first control signal, or triggered by the release signal output by the brake controller 1 to output a second control signal.
[0097] The switch driving circuit 2231 is connected to the controller 2232, the first switch switching circuit 221 and the second switch switching circuit 222 respectively. The switch driving circuit 2231 is used to convert the first control signal into the first switch signal and the third switch signal respectively, or to convert the second control signal into the second switch signal and the fourth switch signal respectively.
[0098] In this embodiment, the controller 2232 outputs a first control signal based on the braking signal output by the brake controller 1, and outputs a second control signal based on the release signal output by the brake controller 1. The first control signal and the second control signal can be level signals or voltage signals. In order to improve the driving capability and meet the voltage working requirements of each switch, a switch driving circuit 2231 is also provided. The switch driving circuit 2231 can realize signal amplification, conversion and other functions to output a switch signal with a corresponding voltage level, thereby reliably controlling the corresponding switching of the first switch switching circuit 221 and the second switch switching circuit 222, and improving the reliability of the drive control.
[0099] The controller 2232 can be a processor such as an MCU, a microcontroller, or a CPU, and the specific type is not limited.
[0100] The switch driver circuit 2231 can be a signal amplifier, signal converter, etc., and its specific structure is not limited.
[0101] Furthermore, in order to supply the current signal, in an optional embodiment, such as Figure 10 As shown, the medical components also include:
[0102] The power output circuit 24 is connected to the positive power supply terminal DC+ and the negative power supply terminal DC- respectively, and is used to output current signals.
[0103] In this embodiment, the power output circuit 24 can be a separate power module, such as a battery or power adapter. Alternatively, the power output circuit 24 can also include a power module and a power conversion circuit connected together. The power conversion circuit converts the DC power output by the power module into a current signal of the corresponding magnitude and outputs it. The power conversion circuit can be a switching power supply circuit, a boost circuit, a buck circuit, etc.
[0104] The power output circuit 24 includes a positive power output terminal and a negative power output terminal. The positive power output terminal is connected to the positive power supply terminal DC+, and the negative power output terminal is connected to the negative power supply terminal DC-.
[0105] The power output circuit 24 is located at a corresponding position of the medical component, such as inside the bed base, and the specific location is not limited.
[0106] In order to achieve adjustable current in braking mode, in one optional embodiment, such as Figure 11 As shown, the power output circuit 24 is also connected to the controller 2232;
[0107] The power output circuit 24 outputs a current signal of the corresponding magnitude based on the current regulation signal (PWM) output by the controller 2232.
[0108] In this embodiment, in braking mode, after receiving the braking signal, the controller 2232 can output a corresponding current adjustment signal PWM to the power output circuit 24. Under the control of the current adjustment signal PWM, the power output circuit 24 can output current signals of different magnitudes, thereby driving the coil 212 to generate a second magnetic field of different magnitudes. The second magnetic field and the first magnetic field are superimposed to provide different magnitudes of attraction force.
[0109] In release mode, after receiving the braking signal, the controller 2232 may not output the corresponding current adjustment signal PWM to the power output circuit 24. The power output circuit 24 maintains the original output current signal, thereby driving the coil 212 to generate a third magnetic field with the same magnetic field strength as the first magnetic field. The third magnetic field cancels out the first magnetic field, and the electromagnet 21 has no attraction or a small attraction to the metal part 12, so that the electromagnet 21 is separated from the metal part 12 and the moving part 10, thereby achieving the effect of releasing the brake.
[0110] The controller 2232 can switch the magnitude of the output current adjustment signal PWM according to the magnitude of the braking signal output by the brake controller 1. The current adjustment signal PWM can be a PWM signal. By changing the duty cycle of the PWM signal, the output voltage or output current of the power output circuit 24 can be changed. The brake controller 1 can be set with multiple brake selection positions or buttons. By selecting different positions or buttons, different magnitudes of brake signals can be switched to output, thereby changing the magnitude of the output current of the power output circuit 24 and adjusting the magnitude of the braking force.
[0111] Since coil 212 is an inductive element, a sudden voltage change will occur across coil 212 after the previous current path ends and before switching current paths. This sudden voltage change may damage the front-end circuit. To avoid this problem, in an optional embodiment, such as... Figure 12 As shown, the braking control circuit 22 also includes a freewheeling circuit 25 connected to both ends of the coil 212. The freewheeling circuit 25 is used to provide a freewheeling loop after the previous current path ends and before switching current paths. Sudden voltage and sudden current can be freewheeled in the freewheeling circuit 25, and the sudden current can change smoothly, reducing the risk of overvoltage damage.
[0112] The freewheeling circuit 25 can employ structures such as a freewheeling diode and a resistor. To simplify the circuit structure, in an optional embodiment, such as... Figure 13 As shown, the freewheeling circuit 25 includes a freewheeling resistor R1. The first end of the freewheeling resistor R1 is connected to the first end of the coil 212, and the second end of the freewheeling resistor R1 is connected to the second end of the coil 212. By using the freewheeling resistor R1, a freewheeling loop can be provided after the previous current path ends and before the current path is switched. Sudden voltage and sudden current can be freewheeled and consumed in the freewheeling resistor R1, reducing the risk of overvoltage damage.
[0113] The beneficial effects of this utility model embodiment compared with the prior art are as follows: The above-mentioned medical component includes a moving part 10 and a fixed part 20. The moving part 10 can move along the direction of movement on the fixed part 20. A metal part 12 is fixedly disposed on the moving part 10. A braking part is disposed on the fixed part 20. The braking part includes a braking control circuit 22 and an electromagnet 21. The electromagnet 21 includes a coil 212 and a permanent magnet 211. The permanent magnet 211 generates a first magnetic field and attracts the metal part 12. During braking, the braking control circuit 22 outputs a current signal of the first current path and drives the coil 212. A second magnetic field with the same magnetic field direction as the first magnetic field is generated, which enhances the attraction force and braking ability of the metal part 12 and the moving part 10. When unlocking and releasing, the braking control circuit 22 switches the output current signal of the second current path and drives the coil 212 to generate a third magnetic field with a magnetic field opposite to the first magnetic field, which cancels the first magnetic field, thereby causing the electromagnet 21 to disengage from the metal part 12 and the moving part 10, achieving the effect of releasing the brake. By switching the current path, the braking ability can be improved, and there is no need to change the structure and number of electromagnets 21, which reduces the design cost and simplifies the structure of the medical component.
[0114] This utility model also proposes a medical device, which includes a medical component. The specific structure of the medical component is as described in the above embodiments. Since this medical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0115] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.
Claims
1. A medical component, characterized in that, include: A moving part (10) is provided with a metal part (12) fixedly disposed on the moving part (10) along the direction of movement; A fixing component (20) is provided with a braking part, the braking part including a braking control circuit (22) and an electromagnet (21) arranged along the direction of movement. The electromagnet (21) includes a coil (212) and a permanent magnet (211). The permanent magnet (211) is arranged opposite to the metal part (12). The permanent magnet (211) generates a first magnetic field and attracts the metal part (12). The braking control circuit (22) is triggered by the braking signal output by the braking controller (1) to output a current signal of the 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. Alternatively, the release signal output by the brake controller (1) may trigger the output of a current signal through a second current path to the coil (212), thereby causing the coil (212) to generate a third magnetic field with a magnetic field direction opposite to that of the first magnetic field.
2. The medical component as described in claim 1, characterized in that, The braking control circuit (22) includes: A first switching circuit (221) is configured such that its first end is connected to the positive power supply terminal (DC+), its second end is connected to the negative power supply terminal (DC-), and its third end is connected to the first end of the coil (212). The first switching circuit (221) is triggered by a first switching signal to connect the positive power supply terminal (DC+) and the first end of the coil (212), or it is triggered by a second switching signal to connect the negative power supply terminal (DC-) and the first end of the coil (212). The current signal is output from the positive power supply terminal (DC+) and flows into the negative power supply terminal (DC-). The second switch switching circuit (222) has a first end connected to the negative power supply terminal (DC-), a second end connected to the positive power supply terminal (DC+), and a third end connected to the second end of the coil (212). The second switch switching circuit (222) is triggered by a third switch signal to connect the negative power supply terminal (DC-) and the second end of the coil (212), or is triggered by a fourth switch signal to connect the positive power supply terminal (DC+) and the second end of the coil (212). The switch control circuit (223) is connected to the first switch switching circuit (221), the second switch switching circuit (222), and the brake controller (1), respectively. The switch control circuit (223) is triggered by the brake signal output by the brake controller (1) to output the first switch signal and the third switch signal, or triggered by the release signal output by the brake controller (1) to output the second switch signal and the fourth switch signal.
3. The medical component as described in claim 2, characterized in that, The first switch switching circuit (221) includes a first single-pole double-throw switch (K1), and the normally closed terminal, normally open terminal and common terminal of the first single-pole double-throw switch (K1) respectively constitute the first terminal, the second terminal and the third terminal of the first switch switching circuit (221); The second switch switching circuit (222) includes a second single-pole double-throw switch (K2), the normally closed terminal, normally open terminal and common terminal of the second single-pole double-throw switch (K2) respectively constitute the first terminal, the second terminal and the third terminal of the second switch switching circuit (222).
4. The medical component as described in claim 2, characterized in that, The first switch switching circuit (221) includes a first switch (Q1) and a second switch (Q2). The first end of the first switch (Q1) is connected to the positive power supply terminal (DC+), and the first end of the second switch (Q2) is connected to the negative power supply terminal (DC-). The second ends of the first switch (Q1), the second ends of the second switch (Q2), and the first end of the coil (212) are connected. The control terminals of the first switch (Q1) and the second switch (Q2) are connected to the first control terminal of the switch control circuit (223). The first switch (Q1) and the second switch (Q2) are opposite switches. The second switch switching circuit (222) includes a third switch (Q3) and a fourth switch (Q4). The first end of the third switch (Q3) is connected to the negative power supply terminal (DC-), and the first end of the fourth switch (Q4) is connected to the positive power supply terminal (DC+). The second ends of the third switch (Q3), the second ends of the fourth switch (Q4), and the second end of the coil (212) are connected. The control terminals of the third switch (Q3) and the fourth switch (Q4) are connected to the second control terminal of the switch control circuit (223).
5. The medical component as described in any one of claims 2 to 4, characterized in that, The switch control circuit (223) includes: The controller (2232) is connected to the brake controller (1) and is triggered by the brake signal output by the brake controller (1) to output a first control signal, or triggered by the release signal output by the brake controller (1) to output a second control signal; A switch driving circuit (2231) is connected to the controller (2232), the first switch switching circuit (221), and the second switch switching circuit (222), respectively. The switch driving circuit (2231) is used to convert the first control signal into the first switch signal and the third switch signal, or to convert the second control signal into the second switch signal and the fourth switch signal, respectively.
6. The medical component as described in claim 5, characterized in that, The medical component also includes: The power output circuit (24) is connected to the positive power supply terminal (DC+) and the negative power supply terminal (DC-) respectively, and is used to output the current signal.
7. The medical component as claimed in claim 6, characterized in that, The power output circuit (24) is also connected to the controller (2232); The power output circuit (24) outputs a current signal of a corresponding magnitude based on the current adjustment signal output by the controller (2232).
8. The medical component as claimed in claim 1, characterized in that, The braking control circuit (22) also includes: A freewheeling circuit (25) is connected to both ends of the coil (212) and is used to provide a freewheeling circuit.
9. The medical component as claimed in claim 8, characterized in that, The freewheeling circuit (25) includes a freewheeling resistor (R1), the first end of which is connected to the first end of the coil (212), and the second end of which is connected to the second end of the coil (212).
10. The medical component as claimed in claim 1, characterized in that, The magnetic field strength of the third magnetic field is the same as that of the first magnetic field, or the difference between the magnetic field strength of the third magnetic field and the magnetic field strength of the first magnetic field is within a preset range, and the direction of the first current path is opposite to that of the second current path.
11. A medical device, characterized in that, Includes the medical components as described in any one of claims 1 to 10.