Limiting protection device and swing type medical tower crane

Abstract

The utility model provides a limiting protection device and a swing type medical tower crane, and relates to the technical field of medical instruments. The motor can drive the swing arm to swing in the preset swing direction under the control of the micro-control unit, the position detection switch is arranged at the limiting position where the swing arm swings in the swing direction, when the swing arm swings to the limiting position, the position detection switch is triggered, and it means that swing of the swing arm reaches the limit; if the swing arm continuously swings again, the problems of structural collision, motor stalling and the like caused by resistance brought by resisting a limit position can be solved, so that the micro-control unit can close the motor when the position detection switch is triggered, so that the motor stops driving the swing arm, namely, the swing arm stops swinging; the problems of structural collision, motor stalling and the like are avoided, and the reliability of the swing type medical tower crane is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular, to a limit protection device and a swing-type medical pendant tower. Background Art

[0002] As an essential medical device in hospitals, the medical pendant tower is usually used as the terminal transfer of medical gases such as oxygen, nitrogen, and compressed air, and is also used to carry medical instruments required for treating patients. It can provide a good nursing space for medical staff and bring significant convenience to the treatment process of patients.

[0003] In related technologies, there are many types of medical pendant towers, such as swing-type medical pendant towers and lifting-type medical pendant towers. For a swing-type medical pendant tower, it generally includes a motor, a swing arm, and a pendant tower box body. The motor is drivingly connected to the swing arm, and the pendant tower box body is fixed on the swing arm. The motor can drive the swing arm to swing in space, thereby driving the pendant tower box body to move in space, and further driving the medical instruments carried by the pendant tower box body to move in space to facilitate medical staff to treat patients. Usually, there are limit positions during the swinging process of the swing arm. When the swing arm swings to the limit position, it will be subjected to a large resistance, making it unable to swing further. However, in the existing swing-type medical pendant towers, even when the swing arm has swung to the limit position, the swing arm will still swing under the drive of the motor to resist the resistance, which often leads to structural collisions and motor jams, reducing the reliability of the swing-type medical pendant tower. Summary of the Utility Model

[0004] The present application provides a limit protection device and a swing-type medical pendant tower, aiming to solve the problem of insufficient reliability of the swing-type medical pendant tower in related technologies.

[0005] To solve the above-mentioned technical problems existing in related technologies, in the first aspect of the present application, a limit protection device is provided, which is applied to a swing-type medical pendant tower. The swing-type medical pendant tower includes a motor, a swing arm, and a pendant tower box body. The motor is drivingly connected to the swing arm, and the pendant tower box body is arranged on the swing arm. Specifically, the limit protection device includes a position detection switch and a micro control unit. The position detection switch is electrically connected to the micro control unit, and the micro control unit is electrically connected to the motor. The micro control unit is used to drive the motor so that the motor drives the swing arm to swing along a predetermined swing direction. The position detection switch is arranged at the first limit position where the swing arm swings along the swing direction. When the swing arm swings to the first limit position, the position detection switch is triggered, and the micro control unit is further used to turn off the motor when the position detection switch is triggered.

[0006] In the second aspect of the present application, a swing-type medical pendant tower is provided, and the swing-type medical pendant tower includes the limit protection device mentioned in the first aspect of the present application.

[0007] It can be understood that through the implementation of the above technical solutions of the present application, the microcontroller unit is used to drive the motor, so that the motor drives the swing arm to swing along a predetermined swing direction. At the same time, a position detection switch is provided at the first limit position where the swing arm swings along the swing direction. When the swing arm swings to the first limit position, the position detection switch is triggered, and the microcontroller unit will turn off the motor when the position detection switch is triggered, so that the motor stops driving the swing arm, that is, the swing arm stops swinging. That is to say, the present application uses whether the position detection switch is triggered as the basis for whether the swing arm swings to the limit position. When the position detection switch is triggered, it means that the swing of the swing arm has reached the limit. If it continues to swing, problems such as structural collision and motor stalling will occur due to the resistance brought by the resistance of the limit position. Therefore, the microcontroller unit of the present application will turn off the motor when the position detection switch is triggered, causing the swing arm to stop swinging, avoiding problems such as structural collision and motor stalling, and improving the reliability of the swing type medical suspension tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the related art or the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the related art or the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, rather than all embodiments. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0009] Figure 1 It is the structural block diagram of the limit protection device provided by the embodiment of the present application;

[0010] Figure 2 It is the swing schematic diagram of the swing arm along the swing direction provided by the embodiment of the present application.

[0011] The marks in the above drawings respectively represent: 100 - limit protection device, 110 - position detection switch, 120 - microcontroller unit, 130 - switch circuit, 140 - drive circuit, 150 - fault protection switch, 160 - buffer, 170 - current detection circuit, 180 - overcurrent protection circuit, 111 - first position detection switch, 112 - second position detection switch, 151 - first fault protection switch, 152 - second fault protection switch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] To make the objectives, technical solutions and advantages of the present application more obvious and understandable, the present application will be clearly and completely described below in conjunction with the embodiments of the present application and the corresponding drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. It should be understood that the various embodiments of the present application described below are only used to explain the present application and are not used to limit the present application. That is, based on the various embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0013] In the related art, a swing-type medical tower crane includes a motor, a swing arm drivingly connected to the motor, and a tower crane box fixed to the swing arm. The motor can drive the swing arm to swing in space, thereby driving the tower crane box to move in space, and further driving the medical instruments carried by the tower crane box to move in space to facilitate medical staff to treat patients. Generally, there are limit positions during the swinging of the swing arm. When the swing arm swings to the limit position, it will be subjected to a large resistance, making it unable to swing further. However, in the existing swing-type medical tower crane, even when the swing arm has swung to the limit position, the swing arm will still swing under the drive of the motor to resist the resistance, which is likely to cause structural collisions and motor jams, thereby reducing the reliability of the swing-type medical tower crane. For this reason, a limit protection device is proposed in the embodiments below of the present application. This limit protection device can be applied to a swing-type medical tower crane to ensure that the swing arm stops swinging when it swings to the limit position, rather than resisting the resistance brought by the limit position, avoiding the occurrence of structural collisions, motor jams, etc., and improving the reliability of the swing-type medical tower crane.

[0014] Figure 1 and Figure 2 are respectively the structural block diagram of the limit protection device and the swinging schematic diagram of the swing arm along the swinging direction. In some embodiments, the limit protection device 100 is applied to a swing-type medical tower crane. The swing-type medical tower crane includes a motor, a swing arm, and a tower crane box. The motor is drivingly connected to the swing arm. The motor can drive the swing arm to swing along a predetermined swinging direction. The tower crane box is arranged on the swing arm to be interlocked with the swing arm. That is to say, when the motor drives the swing arm to swing along the swinging direction, the tower crane box will be driven by the swing arm to move in space, thereby realizing the adjustment of the position of the tower crane box in space.

[0015] Specifically, the limit protection device 100 includes a position detection switch 110 and a micro control unit 120. The position detection switch 110 is disposed at the first limit position where the swing arm swings along the swing direction. The position detection switch 110 is electrically connected to the micro control unit 120, and the micro control unit 120 is electrically connected to the motor. It should be noted that, as Figure 2 shown, the swing direction of the swing arm generally includes two opposite directions, such as swinging upward and swinging downward, or swinging leftward and swinging rightward, etc.; based on this, in this application, the swing direction of the swing arm includes a first swing direction and a second swing direction opposite to the first swing direction. In this case, there are two first limit positions, and the two first limit positions are respectively located in the first swing direction and the second swing direction. Correspondingly, there are two position detection switches 110, and the two position detection switches 110 (i.e., the first position detection switch 111 and the second position detection switch 112) are respectively located at the two first limit positions.

[0016] During the actual working process of the swing type medical suspension tower, the micro control unit 120 can drive the motor to make the motor drive the swing arm to swing along the predetermined swing direction. When the swing arm swings to the first limit position, the position detection switch 110 can be triggered, and the micro control unit 120 can sense whether the position detection switch 110 is triggered. When it senses that it is triggered, it controls the motor to turn off, so that the motor stops driving the swing arm, that is, the swing arm stops swinging. That is to say, in this application, whether the position detection switch 110 is triggered is used as the basis for whether the swing arm swings to the limit position. When the position detection switch 110 is triggered, it means that the swing of the swing arm has reached the limit. If it continues to swing, problems such as structural collision and motor blockage will occur due to resisting the resistance brought by the limit position. Therefore, the micro control unit 120 of this application will turn off the motor when the position detection switch 110 is triggered, causing the swing arm to stop swinging, thereby avoiding problems such as structural collision and motor blockage and improving the reliability of the swing type medical suspension tower.

[0017] As one of the embodiments, please refer to Figure 1, in addition to the structures listed above, the limit protection device 100 further includes a switch circuit 130 and a drive circuit 140. The drive circuit 140 is electrically connected to the motor, and the micro control unit 120 is electrically connected to the drive circuit 140. In addition, the micro control unit 120 is also electrically connected to the drive circuit 140 through the switch circuit 130. During the actual operation of the swing type medical suspension tower, the micro control unit 120 can control the switch circuit 130 to turn on the drive circuit 140 and send a drive signal to the drive circuit 140 to guide the drive circuit 140 to drive the motor through the drive signal, so that the motor drives the swing arm to swing along the swing direction. When the swing arm swings to the first limit position, the micro control unit 120 senses that the position detection switch 110 is triggered, and can control the switch circuit 130 to turn off the drive circuit 140, that is, stop the drive circuit 140 from driving the motor, so that the motor is turned off. At this time, the drive of the motor to the swing arm will also stop, that is, the swing arm will also stop swinging.

[0018] Preferably, the micro control unit 120 is electrically connected to the drive circuit 140 through a buffer 160. The buffer 160 can transmit the drive signal from the micro control unit 120 to the drive circuit 140. In essence, it is an amplifier circuit, which can specifically enhance the drive signal, such as enhancing current, voltage, power, etc., to ensure the smooth transmission of the drive signal. Preferably, the drive circuit 140 is a H-bridge drive circuit, and the switch circuit 130 is a PMOS switch circuit.

[0019] Furthermore, during the actual operation of the swing type medical suspension tower, it is inevitable that the position detection switch 110 fails or the micro control unit 120 freezes. When the position detection switch 110 fails, even if the swing arm has swung to the first limit position under the drive of the motor, the position detection switch 110 will not be triggered. When the micro control unit 120 freezes, although the position detection switch 110 is triggered when the swing arm swings to the first limit position, the micro control unit 120 cannot sense that the position detection switch 110 is triggered, that is, the micro control unit 120 will not control the switch circuit 130 to turn off the drive circuit 140. That is to say, whether the position detection switch 110 fails or the micro control unit 120 freezes, the swing arm will not stop swinging when it swings to the first limit position, but will continue to swing to resist the resistance brought by the limit position. At this time, problems such as structural collision and motor stall will still occur.

[0020] In this embodiment, to solve the drawbacks caused by the failure of the position detection switch 110 and / or the freeze of the micro control unit 120, please refer to Figure 1, in addition to the structures listed above, the limit protection device 100 further includes a fault protection switch 150. The fault protection switch 150 is electrically connected to the switch circuit 130 and is disposed at the second limit position where the swing arm swings along the swing direction. When the swing direction of the swing arm remains unchanged and the swing arm does not stop swinging, the swing arm will first reach the first limit position, and then cross the first limit position and reach the second limit position. That is to say, as Figure 2 shown, along the same swing direction, the first limit position is closer and the second limit position is farther. It should be noted that, as also mentioned above, as Figure 2 shown, in this application, the swing direction of the swing arm includes a first swing direction and a second swing direction opposite to the first swing direction. In this case, there are two second limit positions, and the two second limit positions are respectively located in the first swing direction and the second swing direction. Correspondingly, there are two fault protection switches 150, and the two fault protection switches 150 (i.e., the first fault protection switch 151 and the second fault protection switch 152) are respectively located at the two second limit positions.

[0021] During the actual working process of the swing type medical pendant, when the swing arm crosses the first limit position and swings to the second limit position, the fault protection switch 150 can be triggered. The switch circuit 130 can sense whether the fault protection switch 150 is triggered, and when it senses that it is triggered, it closes the drive circuit 140, that is, stops the drive of the motor by the drive circuit 140, so that the motor is turned off. At this time, the drive of the swing arm by the motor also stops, that is, the swing arm also stops swinging. It can be understood that when the fault protection switch 150 is triggered, it means that the swing arm has crossed the first limit position and swung to the second limit position. At the same time, it also means that when the swing arm swings to the first limit position, the micro control unit 120 does not control the switch circuit 130 to close the drive circuit 140, that is, the swing arm does not stop swinging when it reaches the first limit position. This may be caused by the failure of the position detection switch 110, the crash of the micro control unit 120, etc. In response to this situation, when the swing arm crosses the first limit position and reaches the second limit position and triggers the fault protection switch 150, the switch circuit 130 of this application can sense this and directly close the drive circuit 140, causing the swing arm to stop swinging, instead of closing the drive circuit 140 through the micro control unit 120. In this way, the disadvantages brought by the failure of the position detection switch 110, the crash of the micro control unit 120, etc. can be effectively avoided.

[0022] As one of the embodiments, please refer to Figure 1, in addition to the structures listed above, the limit protection device 100 further includes a current detection circuit 170, and the current detection circuit 170 is electrically connected between the drive circuit 140 and the micro control unit 120. During the actual operation of the swing type medical suspension tower, the current detection circuit 170 can obtain the drive current output by the drive circuit 140 to the motor, and transmit the obtained drive current to the micro control unit 120. The micro control unit 120 can determine whether the drive current is greater than a preset current threshold, and when it is greater than the preset current threshold, control the switch circuit 130 to turn off the drive circuit 140, that is, stop the drive circuit 140 from driving the motor, so that the motor is turned off. At this time, the drive of the swing arm by the motor will also stop, that is, the swing arm will stop swinging. It can be understood that when the drive current is greater than the preset current threshold, it means that the circuit is currently overcurrent, which is likely to cause various circuit failures and thus affect the normal operation of the swing type medical suspension tower. In view of this situation, when the micro control unit 120 of the present application determines that the drive current is greater than the preset current threshold, it will control the switch circuit 130 to turn off the drive circuit 140, so that the motor is turned off and the swing arm stops swinging, thereby avoiding various circuit failures and ensuring the use safety of the swing type medical suspension tower.

[0023] Further, during the actual operation of the swing type medical suspension tower, it is inevitable that the current detection circuit 170 fails, the micro control unit 120 crashes, etc. When the current detection circuit 170 fails, even if the current detection circuit 170 has obtained the drive current output by the drive circuit 140 to the motor, it cannot transmit the obtained drive current to the micro control unit 120. When the micro control unit 120 crashes, even if the micro control unit 120 can receive the drive current from the current detection circuit 170, it cannot compare the drive current with the preset current threshold, that is, it cannot determine whether the circuit is currently overcurrent according to the drive current. That is to say, whether the current detection circuit 170 fails or the micro control unit 120 crashes, the drive circuit 140 cannot be turned off when the circuit is overcurrent, that is, the motor cannot be turned off. At this time, it is still easy to cause various circuit failures, thus affecting the normal operation of the swing type medical suspension tower.

[0024] In this embodiment, to solve the disadvantages brought by the failure of the current detection circuit 170 and / or the crash of the micro control unit 120, please refer to Figure 1, in addition to the structures listed above, the limit protection device 100 further includes an overcurrent protection circuit 180, and the overcurrent protection circuit 180 is electrically connected between the current detection circuit 170 and the switch circuit 130. During the actual operation of the swing-type medical tower crane, the overcurrent protection circuit 180 can obtain the driving current from the current detection circuit 170 to determine whether the driving current is greater than a preset current threshold, and when it is greater than the preset current threshold, control the switch circuit 130 to turn off the driving circuit 140, that is, stop the driving circuit 140 from driving the motor, so that the motor is turned off. At this time, the driving of the swing arm by the motor will also stop, that is, the swing arm will also stop swinging. It can be understood that when the current detection circuit 170 fails and / or the micro control unit 120 crashes, the overcurrent protection circuit 180 can obtain the driving current output from the driving circuit 140 to the motor, and judge whether the circuit is overcurrent according to the driving current. Once it is judged that the circuit is overcurrent, the switch circuit 130 can be directly controlled to turn off the driving circuit 140, so that the motor is turned off and the swing arm stops swinging, instead of turning off the driving circuit 140 through the micro control unit 120. In this way, the disadvantages brought by the failure of the current detection circuit 170 and the crash of the micro control unit 120 can be effectively avoided.

[0025] The above embodiments are only the preferred implementations of the present application, and they are not the only limitations on the relevant content of the limit protection device 100; in this regard, those skilled in the art can flexibly set according to the actual application scenario on the basis of the above embodiments. It can be understood that through the implementation of the above embodiments of the present application, whether the position detection switch 110 is triggered is used as the basis for whether the swing arm swings to the limit position. When the position detection switch 110 is triggered, it means that the swing of the swing arm has reached the limit. If it continues to swing, problems such as structural collision and motor blockage will occur due to the resistance brought by the resistance of the limit position. Therefore, the micro control unit 120 of the present application will turn off the motor when the position detection switch 110 is triggered, causing the swing arm to stop swinging, avoiding problems such as structural collision and motor blockage, and improving the reliability of the swing-type medical tower crane.

[0026] It should be noted that several embodiments shown above in this application are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. It should also be noted that in the textual description of this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is such an actual relationship or order between these entities or operations. Further, the term "comprising", "including" or any other corresponding variant is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes these elements, but may also include other elements not explicitly listed, or may also include elements inherent in such a process, method, article or device; and, without more limitations, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0027] In addition, by implementing several embodiments shown above in this application, those skilled in the art can implement or use this application. For the several embodiments shown above in this application, various modifications will be obvious to those skilled in the art. The general principles defined in this application can be implemented in other embodiments not shown without departing from the spirit or scope of this application. Therefore, this application will not be limited to the several embodiments shown above, but rather to the broadest scope consistent with the principles and novel features disclosed in this application.

Claims

1. A limit protection device, characterized in that, Applied to a swing-type medical suspension arm tower, the swing-type medical suspension arm tower includes a motor, a swing arm, and a suspension arm tower box body. The motor is drivingly connected to the swing arm, and the suspension arm tower box body is disposed on the swing arm. The limit protection device includes: A micro control unit, electrically connected to the motor, for driving the motor so that the motor drives the swing arm to swing along a predetermined swing direction; A position detection switch, disposed at a first limit position where the swing arm swings along the swing direction. When the swing arm swings to the first limit position, the position detection switch is triggered; The micro control unit is also electrically connected to the position detection switch and is further configured to turn off the motor when the position detection switch is triggered.

2. The limit protection device according to claim 1, characterized in that, The swing direction includes a first swing direction and a second swing direction opposite to the first swing direction. There are two first limit positions, and the two first limit positions are respectively located in the first swing direction and the second swing direction. There are two position detection switches, and the two position detection switches are respectively located at the two first limit positions.

3. The limit protection device according to claim 1, characterized in that, It further includes a switch circuit and a drive circuit. The micro control unit is electrically connected to the drive circuit, and the micro control unit is electrically connected to the drive circuit through the switch circuit. The drive circuit is electrically connected to the motor; The micro control unit is specifically configured to: control the switch circuit to turn on the drive circuit and send a drive signal to the drive circuit to guide the drive circuit to drive the motor through the drive signal; and, when the position detection switch is triggered, control the switch circuit to turn off the drive circuit to turn off the motor.

4. The limit protection device according to claim 3, characterized in that, It further includes a fault protection switch. The fault protection switch is disposed at a second limit position where the swing arm swings along the swing direction. When the swing direction remains unchanged and the swing arm does not stop swinging, the swing arm first reaches the first limit position and then reaches the second limit position, where: The fault protection switch is electrically connected to the switch circuit. When the swing arm crosses the first limit position and swings to the second limit position, the fault protection switch is triggered; The switch circuit is further configured to turn off the drive circuit to turn off the motor when the fault protection switch is triggered.

5. The limit protection device according to claim 4, characterized in that, The swing direction includes a first swing direction and a second swing direction opposite to the first swing direction. There are two second limit positions, and the two second limit positions are respectively located in the first swing direction and the second swing direction. There are two fault protection switches, and the two fault protection switches are respectively located at the two second limit positions.

6. The limit protection device according to claim 3, characterized in that, It further includes a buffer. The micro control unit is electrically connected to the drive circuit through the buffer, and the buffer is used to transmit the drive signal from the micro control unit to the drive circuit.

7. The limit protection device according to claim 3, characterized in that, It further includes a current detection circuit, which is electrically connected between the drive circuit and the microcontroller unit, and is used to obtain the drive current output by the drive circuit to the motor and transmit it to the microcontroller unit; The microcontroller unit is further used to judge whether the drive current is greater than a preset current threshold, and when it is greater than the preset current threshold, control the switch circuit to turn off the drive circuit so as to turn off the motor.

8. The limit protection device according to claim 7, characterized in that It further includes an overcurrent protection circuit, which is electrically connected between the current detection circuit and the switch circuit, and is used to obtain the drive current from the current detection circuit to judge whether the drive current is greater than the preset current threshold, and when it is greater than the preset current threshold, control the switch circuit to turn off the drive circuit so as to turn off the motor.

9. The limit protection device according to claim 3, characterized in that, The drive circuit is an H-bridge drive circuit, and the switch circuit is a PMOS switch circuit.

10. A swing-type medical suspension tower, characterized in that, It includes the limit protection device according to any one of claims 1 to 9.

Images