Magnetic traction surgical field exposure system magnet adjusting structure and traction device

Abstract

The utility model discloses a magnetic traction operation field exposure system magnet adjusting structure and a traction device, and relates to the technical field of medical instruments.The magnetic traction operation field exposure system magnet adjusting structure is applied to the traction device of an endoscope and comprises a driving source and an outer magnet connected with the driving end of the driving source, and the driving source drives the outer magnet to move; the magnet is used for getting close to or away from the inner magnet to adjust the magnetic force between the inner magnet and the outer magnet. According to the magnet adjusting structure and the traction device of the magnetic traction operation field exposure system, the magnitude of magnetic force can be controlled, and traction and release in the operation process can be accurately and conveniently controlled.

Description

Technical Field

[0001] This application relates to the technical field of medical devices. Specifically, it relates to a magnet adjustment structure and a traction device for a magnetic traction surgical field exposure system. Background Technique

[0002] Nowadays, as a new type of surgery, endoscopic surgery has the advantages of small surgical wounds and fast postoperative recovery, and is increasingly favored by doctors and patients. However, since endoscopic surgery also has the disadvantages of a small surgical operation field of view and tissue occlusion, during endoscopic surgery, according to the different surgical sites, when cutting and dissecting certain tissues and organs, it is necessary to pull the surrounding tissues to expose the surgical operation required field of view.

[0003] The most commonly used method for tissue traction under the existing laparoscope is to add an additional operation hole on the body surface, and introduce an operating forceps or other auxiliary instruments during the operation to assist in pulling the tissue to facilitate the smooth progress of the operation. However, it will produce extra wounds on the patient's body surface, increasing the damage to the patient. Sometimes, additional surgical auxiliary manpower is also required, which will cause certain trouble to the doctor. Another method is to use a puncture needle with a thread to penetrate the abdominal wall. One end of the thread is connected to the tissue to be pulled, and the other end of the thread is fixed outside the abdominal wall. In this way, the tissue can be pulled by lifting the thread outside the abdominal wall. Because a puncture needle is required to penetrate the abdominal wall, although it reduces the trauma compared to establishing an operation hole on the body surface, there is still damage to the abdominal wall. Moreover, some puncture needle instruments with threads also need to puncture the tissue to be pulled, which will also cause certain damage to the tissue to be pulled, which may aggravate the patient's condition and prolong the operation time. The third method is to use the principle of magnets. An auxiliary instrument is used to pull the tissue in the body, and a magnet is placed outside the abdominal wall. The magnet and the auxiliary instrument in the body attract each other, thereby controlling tissue traction. However, since the magnet outside the body cannot adjust the magnetic force, it is not easy to control. Utility Model Content

[0004] The purpose of this application is to provide a magnet adjustment structure and a traction device, which can control the magnetic force and accurately and conveniently control the traction and release during the operation.

[0005] One aspect of the embodiment of this application provides a magnet adjustment structure for a magnetic traction surgical field exposure system, which is applied to the traction device of an endoscope, including a driving source and an external magnet connected to the driving end of the driving source. The driving source drives the external magnet to move, for approaching or departing from an internal magnet, so as to adjust the magnetic force of the external magnet on the internal magnet.

[0006] As an implementable method, the driving source includes a motor, and the motor is connected to the external magnet through a transmission member. The rotation of the motor drives the transmission member to move to drive the external magnet to move linearly.

[0007] As an implementable manner, the transmission member includes a lead screw, the lead screw is connected to the driving end of the motor, and the outer magnet is threadedly connected to the lead screw.

[0008] As an implementable manner, the transmission member further includes a reduction gearbox connected to the motor, and the lead screw is connected to the output end of the reduction gearbox.

[0009] As an implementable manner, the magnet adjustment structure of the magnetic traction surgical field exposure system further includes a housing, the motor and the outer magnet are both arranged in the housing, the outer magnet is columnar, a guide ring surrounding the outer periphery of the outer magnet and fixed to the outer magnet is further arranged in the housing, and a limiting structure is arranged between the guide ring and the housing to limit the circumferential movement of the outer magnet.

[0010] As an implementable manner, the magnet adjustment structure of the magnetic traction surgical field exposure system further includes a mounting plate arranged in the housing, the mounting plate is arranged between the motor and the outer magnet, the motor is fixedly connected to the mounting plate, and the lead screw passes through the mounting plate and is connected to the outer magnet.

[0011] As an implementable manner, the magnet adjustment structure of the magnetic traction surgical field exposure system further includes a detection component for detecting the distance between the outer magnet and the motor.

[0012] As an implementable manner, the detection component includes a photoelectric sensor arranged on the housing and a stop piece arranged on the outer magnet. When the outer magnet moves, the stop piece is driven to move, and the photoelectric sensor senses the stop piece to detect the position of the outer magnet.

[0013] Another aspect of the embodiments of the present application provides a pulling device applied to an endoscope, including an inner magnet, a bracket, and the above-mentioned magnet adjustment structure of the magnetic traction surgical field exposure system arranged on the bracket. The inner magnet is magnetically connected to the outer magnet of the magnet adjustment structure of the magnetic traction surgical field exposure system. The inner magnet is arranged in the human body, and a jaw for clamping tissues is arranged on the inner magnet.

[0014] The beneficial effects of the embodiments of the present application include:

[0015] The magnet adjustment structure of the magnetic traction surgical field exposure system provided by the present application is applied to the traction device of an endoscope, and includes a driving source and an external magnet connected to the driving end of the driving source. The driving source drives the external magnet to move, for approaching or moving away from the internal magnet. When the magnet adjustment structure of the magnetic traction surgical field exposure system is working, when it is necessary to increase the attraction force of the external magnet on the internal magnet, the driving source drives the external magnet to approach the internal magnet. In this way, since the magnetic field formed by the external magnet is closer to the internal magnet, the attraction force on the internal magnet is greater, making the pulling tension of the internal magnet on the tissue greater; similarly, when it is necessary to reduce the attraction force of the external magnet on the internal magnet, the driving source drives the external magnet to move away from the internal magnet. In this way, since the magnetic field formed by the internal magnet is far from the internal magnet, the attraction force on the internal magnet is smaller, making the pulling tension of the internal magnet on the tissue smaller. Therefore, the magnet adjustment structure of the magnetic traction surgical field exposure system in the embodiment of the present application can adjust the magnetic force of the external magnet on the internal magnet, and can accurately and conveniently control the pulling and releasing during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0017] Figure 1 FIG. is a schematic structural diagram of a magnetic force adjustment mechanism provided by an embodiment of the present application;

[0018] Figure 2 FIG. is an exploded view of a magnetic force adjustment mechanism provided by an embodiment of the present application;

[0019] Figure 3 FIG. is a sectional view of a magnetic force adjustment mechanism provided by an embodiment of the present application.

[0020] Reference numerals: 100 - magnet adjustment structure of the magnetic traction surgical field exposure system; 110 - housing; 121 - motor; 122 - lead screw; 123 - reduction gearbox; 130 - external magnet; 141 - guide ring; 142 - limiting structure; 143 - mounting plate; 150 - detection assembly; 151 - photoelectric sensor; 152 - baffle; 161 - handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. Components of the embodiments of this application generally described and illustrated in the drawings herein can be arranged and designed in a variety of different configurations.

[0022] Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of this application that is claimed, but is merely representative of selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts fall within the scope of protection of this application.

[0023] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of this application, it should also be noted that unless otherwise clearly defined and limited, the terms "arranged", "installed", "connected", and "coupled" should be construed broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] The embodiments of this application provide a magnet adjustment structure 100 for a magnetic traction surgical field exposure system (hereinafter referred to as the magnetic force adjustment structure 100), which is applied to the retraction device of an endoscope, such as Figure 1 and Figure 2 As shown, it includes a driving source and an external magnet 130 connected to the driving end of the driving source. The driving source drives the external magnet 130 to move, for approaching or moving away from the internal magnet, so as to adjust the magnetic force of the external magnet on the internal magnet.

[0026] The magnetic force adjustment structure 100 provided by the embodiments of this application is applied to the retraction device of an endoscope. The retraction device includes an internal magnet and the magnetic force adjustment structure 100. The magnetic force adjustment mechanism includes an external magnet 130, which is magnetically connected. When the retraction device works, the internal magnet is placed inside the human body, and a jaw for clamping human tissue is arranged on the internal magnet. The external magnet 130 is placed outside the human body, and the external magnet 130 uses the magnetic field to adsorb the internal magnet, so that the internal magnet moves, thereby driving the tissue to open and exposing the field of view.

[0027] Specifically, the magnetic force adjustment structure 100 provided in the embodiments of the present application includes a driving source, an outer magnet 130 connected to the driving end of the driving source. The driving source drives the outer magnet 130 to move linearly, so as to approach or move away from the inner magnet. When the magnetic force adjustment structure 100 is working, when it is necessary to increase the attractive force of the outer magnet 130 on the inner magnet, the driving source drives the outer magnet 130 to approach the inner magnet. In this way, since the magnetic field formed by the outer magnet 130 is closer to the inner magnet, the greater the attractive force on the inner magnet, the greater the pulling tension of the inner magnet on the tissue; similarly, when it is necessary to reduce the attractive force of the outer magnet 130 on the inner magnet, the driving source drives the outer magnet 130 to move away from the inner magnet. In this way, since the magnetic field formed by the inner magnet is far from the inner magnet, the smaller the attractive force on the inner magnet, the smaller the pulling tension of the inner magnet on the tissue. Therefore, the magnetic force adjustment structure 100 in the embodiments of the present application can adjust the magnetic force of the outer magnet 130 on the inner magnet, and can accurately and conveniently control the pulling and releasing during the operation.

[0028] In practical applications, the magnetic force adjustment structure 100 is arranged at the end of the bracket, and the end position of the bracket is adjustable so that the position of the adjustment structure is adjustable. To facilitate the adjustment of the position of the magnetic force adjustment structure 100, a handle 161 can be arranged on the housing 110. As Figure 1 shown, when it is necessary to move the magnetic force adjustment structure 100, hold the handle 161 to move the magnetic force adjustment structure 100, so that the end of the bracket changes with the change of the position of the magnetic force adjustment structure 100.

[0029] The magnetic force adjustment structure 100 provided in the present application adjusts the distance between the outer magnet 130 and the inner magnet through the driving source, so that the magnetic force of the outer magnet 130 on the inner magnet changes, and the pulling tension of the inner magnet on the tissue changes. Therefore, the magnetic force adjustment structure 100 in the embodiments of the present application can adjust the magnetic force of the outer magnet 130 on the inner magnet, and can accurately and conveniently control the pulling and releasing during the operation.

[0030] Optionally, as Figure 2 and Figure 3 shown, the driving source includes a motor 121, and the motor 121 is connected to the outer magnet 130 through a transmission member. The motor 121 rotates to drive the transmission member to move so as to drive the outer magnet 130 to move linearly.

[0031] Specifically, the driving source includes a motor 121, and the motor 121 is connected to the outer magnet 130 through a transmission member. The transmission member converts the rotational motion of the motor 121 into a linear motion, so that the outer magnet 130 moves linearly.

[0032] Adopting the method of the motor 121 and the transmission member to realize the linear motion of the outer magnet 130 makes the linear motion of the outer magnet 130 easier to control.

[0033] In an implementable manner of the embodiment of the present application, as Figure 2 and Figure 3 shown, the transmission member includes a lead screw 122, the lead screw 122 is connected to the driving end of the motor 121, and the outer magnet 130 is threadedly connected to the lead screw 122.

[0034] The transmission member is the lead screw 122. One end of the lead screw 122 is connected to the driving end of the motor 121, and the outer magnet 130 is threadedly connected to the lead screw 122. During the rotation of the lead screw 122, the outer magnet 130 moves along the axial direction of the lead screw 122 under the action of the thread. The structure of the lead screw 122 is simple and occupies a small volume, thus simplifying the structure of the magnet adjustment structure.

[0035] It can be understood that when the lead screw 122 is connected to the outer magnet 130, a connection hole can be opened on the axis of the outer magnet 130, and the lead screw 122 extends into the connection hole to be connected to the outer magnet 130, wherein the connection hole is a threaded hole.

[0036] Optionally, as Figure 2 and Figure 3 shown, the transmission member further includes a reduction gearbox 123 connected to the motor 121, and the lead screw 122 is connected to the output end of the reduction gearbox 123.

[0037] The reduction gearbox 123 is used to convert the high-speed low-torque generated by the motor 121 into a low-speed high-torque output, so that the lead screw 122 can have a lower rotational speed and a higher torque, and can better drive the outer magnet 130 to move linearly.

[0038] In an implementable manner of the embodiment of the present application, as Figure 2 and Figure 3 shown, the magnetic force adjustment structure further includes a housing. The motor and the outer magnet are both arranged in the housing. The outer magnet 130 is columnar. A guide ring 141 surrounding the outer periphery of the outer magnet 130 and fixed to the outer magnet 130 is further arranged in the housing 110. A limiting structure 142 is arranged between the guide ring 141 and the housing 110 to limit the circumferential movement of the outer magnet 130.

[0039] Since the lead screw 122 converts rotation into linear motion, there is a risk that the outer magnet 130 rotates during the conversion process. In the embodiment of the present application, a guide ring 141 is arranged in the housing 110. The guide ring 141 surrounds the outer periphery of the outer magnet 130 and is fixedly connected to the outer magnet 130. In addition, a limiting structure 142 is arranged between the guide ring 141 and the housing 110 to prevent the rotation of the guide ring 141. Since the guide ring 141 is fixedly connected to the outer magnet 130, the rotation of the outer magnet 130 is thus avoided, so that the outer magnet 130 can only move linearly along the axial direction of the lead screw 122.

[0040] Specifically, the specific structure of the limiting structure 142 is not limited in the embodiments of the present application, as long as the rotation between the guiding ring 141 and the housing 110 can be avoided. For example, Figure 2 As shown, a limiting protrusion is provided on the outer periphery of the guiding ring 141, and a limiting groove is provided on the housing 110 corresponding to the limiting protrusion. The limiting protrusion extends into the limiting groove. Due to the limitation of the limiting groove, the limiting protrusion cannot rotate, so that the guiding ring 141 cannot rotate relative to the housing 110 and can only move in the vertical direction.

[0041] Specifically, the end of the housing 110 along the moving direction of the outer magnet 130 can be open. When the outer magnet 130 moves linearly, it extends into or retracts from the housing 110; it can also be closed, and there is a certain moving space in the housing 110 for the outer magnet 130 to move. Of course, in order to avoid the influence of impurities in the external environment on the magnetic force adjusting structure 100, the housing 110 is set to be closed. When the housing 110 is set to be closed, in order to enable the magnetic field generated by the outer magnet 130 to act on the inner magnet, the housing 110 should be set as a magnetic conductor.

[0042] Optionally, as Figure 2 and Figure 3 shown, the magnetic force adjusting structure 100 further includes a mounting plate 143 disposed in the housing 110. The mounting plate 143 is disposed between the motor 121 and the outer magnet 130. The motor 121 is fixedly connected to the mounting plate 143, and the lead screw 122 passes through the mounting plate 143 and is connected to the outer magnet 130.

[0043] In order to improve the mounting stability of the motor 121, in the embodiments of the present application, a mounting plate 143 is provided between the motor 121 and the outer magnet 130, and the motor 121 is fixed to the mounting plate 143. The outer periphery of the mounting plate 143 is connected to the periphery of the housing 110, so that the motor 121 is mounted on the housing 110. Through the setting of the mounting plate 143, a mounting platform is provided for the mounting of the motor 121, the contact area of the motor 121 is increased, and the mounting stability of the motor 121 is improved.

[0044] In addition, in order to connect the lead screw 122 to the outer magnet 130, a through hole is formed in the mounting plate 143, and the lead screw 122 passes through the through hole and is connected to the outer magnet 130.

[0045] Optionally, as Figure 2 and Figure 3 shown, the magnetic force adjusting structure 100 further includes a detection component 150 for detecting the distance between the outer magnet 130 and the motor 121.

[0046] To detect the position of the outer magnet 130 to control the operation of the motor 121, the magnetic force adjustment structure 100 of the embodiment of the present application further includes a detection component 150. The detection component 150 is a distance detection component 150 for detecting the distance between the outer magnet 130 and the motor 121, avoiding the outer magnet 130 moving beyond the range and detaching from the lead screw 122 or being too close to the motor 121 and colliding with the motor 121, and improving the working stability of the magnetic force adjustment structure 100.

[0047] In an implementable manner of the embodiment of the present application, as Figure 2 and Figure 3 shown, the detection component 150 includes a photoelectric sensor 151 disposed on the housing 110 and a baffle 152 disposed on the outer magnet 130. When the outer magnet 130 moves, it drives the baffle 152 to move, and the photoelectric sensor 151 senses the baffle 152 to detect the position of the outer magnet 130.

[0048] Specifically, a baffle 152 is disposed on the outer magnet 130, and the baffle 152 moves along with the movement of the outer magnet 130. A photoelectric sensor 151 is disposed on the housing 110. When the baffle 152 moves into the detection range of the photoelectric sensor 151, it is determined that the outer magnet 130 is moving within the movement range. When the baffle 152 moves out of the detection range of the photoelectric sensor 151, it is determined that the outer magnet 130 exceeds the movement range. At this time, the motor 121 is controlled to stop rotating.

[0049] In practical applications, the outer magnet 130 has a stop point at the uppermost end and a stop point at the lowermost end. Therefore, photoelectric sensors 151 can be respectively disposed corresponding to the uppermost end and the lowermost end. When the end of the baffle 152 is located between the two photoelectric sensors 151, it is determined that the outer magnet 130 is moving within the movement range. When the end of the baffle 152 is located in the area outside the two photoelectric sensors 151, it is determined that the outer magnet 130 exceeds the movement range. At this time, the motor 121 is controlled to stop rotating.

[0050] By arranging the two photoelectric sensors 151, the movement range of the outer magnet 130 can be accurately controlled, and the outer magnet 130 is prevented from exceeding the movement range.

[0051] In addition, in order to make full use of the space inside the housing 110, the photoelectric sensor 151 can be disposed on the side of the mounting plate 143 away from the outer magnet 130. In order to enable the baffle 152 to extend between the two photoelectric sensors 151, at this time, a notch is opened on the mounting plate 143, and the end of the baffle 152 passes through the notch and extends to the position of the photoelectric sensor 151. Among them, the length of the baffle 152 in the vertical direction can be determined according to the distance between the photoelectric sensor 151 and the outer magnet 130.

[0052] An embodiment of the present application also discloses a pulling device, which is applied to an endoscope and includes an inner magnet, a bracket, and the above-mentioned magnetic force adjusting structure 100 disposed on the bracket. The inner magnet is magnetically connected to the outer magnet 130 of the magnetic force adjusting structure 100. The inner magnet is disposed inside the human body, and a jaw for clamping tissue is provided on the inner magnet. This pulling device has the same structure and beneficial effects as the magnetic force adjusting structure 100 in the foregoing embodiment. The specific structure and beneficial effects of the magnetic force adjusting structure 100 have been described in detail in the foregoing embodiment and will not be elaborated herein.

[0053] The foregoing is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A magnetic traction field exposure system magnet adjustment structure, applied to the traction device of an endoscope, characterized in that: It includes a driving source and an external magnet connected to the driving end of the driving source. The driving source drives the external magnet to move closer to or away from the inner magnet to adjust the magnetic force of the external magnet on the inner magnet.

2. The magnet adjustment structure of the magnetic traction field exposure system according to claim 1 is characterized in that: The driving source comprises a motor, and the motor is connected to the external magnet via a transmission member. The motor rotates to drive the transmission member to move so as to drive the external magnet to move in a straight line.

3. The magnet adjustment structure of the magnetic traction field exposure system according to claim 2, characterized in that: The transmission member comprises a screw rod, the screw rod is connected to the driving end of the motor, and the external magnet is threadedly connected to the screw rod.

4. The magnet adjustment structure of the magnetic traction field exposure system according to claim 3 is characterized in that: The transmission member also includes a reduction box connected to the motor, and the lead screw is connected to the output end of the reduction box.

5. The magnet adjustment structure of the magnetic traction field exposure system according to claim 3, characterized in that: It also includes a shell, in which the motor and the external magnet are both arranged. The external magnet is cylindrical. A guide ring is also arranged in the shell, which surrounds the outer periphery of the external magnet and is fixed to the external magnet. A limiting structure is arranged between the guide ring and the shell to limit the circumferential movement of the external magnet.

6. The magnet adjustment structure of the magnetic traction field exposure system according to claim 5, characterized in that: It also includes a mounting plate arranged in the shell, the mounting plate is arranged between the motor and the external magnet, the motor is fixedly connected to the mounting plate, and the screw rod passes through the mounting plate and is connected to the external magnet.

7. The magnet adjustment structure of the magnetic traction field exposure system according to claim 5, characterized in that: It also includes a detection component, which is used to detect the distance between the external magnet and the motor.

8. The magnet adjustment structure of the magnetic traction field exposure system according to claim 7, characterized in that: The detection component includes a photoelectric sensor arranged on the shell and a baffle arranged on the external magnet. When the external magnet moves, the baffle is driven to move. The photoelectric sensor senses the baffle to detect the position of the external magnet.

9. A pulling device, used in an endoscope, characterized in that: It includes an inner magnet, a bracket, and a magnet adjustment structure of a magnetic traction surgical field exposure system as described in any one of claims 1 to 8 arranged on the bracket, wherein the outer magnet of the magnet adjustment structure of the magnetic traction surgical field exposure system is magnetically connected to the inner magnet, the inner magnet is arranged in the human body and the inner magnet is provided with a clamp for clamping tissue.

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