Adjusting module for medical instrument and medical instrument

Abstract

The utility model relates to an adjusting module of a medical instrument and the medical instrument, the adjusting module comprises an operation unit arranged on a shell of the medical instrument, and the operation unit can move by a first distance under the action of external force; the transmission unit is connected to the operation unit and comprises a driving part, a fixed part and a driven part, the driving part is in transmission connection with the fixed part and the driven part, the driven part is connected with a working module, and the fixed part is fixedly arranged on the shell; wherein the driving part is in transmission connection with the operation unit and is driven by the operation unit to move along the fixed part by a second distance, the driven part can be driven by the driving part to move by a third distance, and the third distance is larger than the first distance and larger than the second distance. The large moving distance of the working module is achieved with the small operation range, the operation action of an operator is saved, and the application range for various operators is wider.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an adjustment module and medical devices for medical devices. Background Art

[0002] An endoscope is a medical device that integrates traditional optics, ergonomics, precision machinery, modern electronics, mathematics, and software. An endoscope has an image sensor, an optical lens, a light source, a mechanical device, etc. It enters the body through the natural channels of the organism to perform corresponding operations. An endoscope is an extremely precise medical device that can be used to remove tissues, such as polyps or other areas of concern, or to observe relevant tissues with an endoscope. When removing tissue, a cautery catheter with a wire snare is inserted into the endoscope, or the snare is directly inserted into the organism to remove and cauterize tissue. In many surgical situations, doctors prefer to use tools that allow them to perform multiple tasks with minimal movement, and due to different habits and hand sizes of doctors, each doctor has a different range of motion when operating an endoscope.

[0003] In the related art, the working end sometimes has to move a considerable distance, but when the range of motion of the operating end of the endoscope is too large, it cannot be suitable for most doctors and is difficult to operate with one hand. This makes it impossible to feel that the distal end of the endoscope has moved a sufficient distance during operation, affecting the accuracy of the distal operation. In severe cases, polyps or other tissues may be cut off before the burning current is applied, resulting in bleeding and other harmful consequences. Summary of the invention

[0004] Based on this, it is necessary to provide an adjustment module and medical device for medical devices that are easy to operate and have wide applicability to address the above problems.

[0005] In one aspect, an adjustment module for a medical device is provided, the adjustment module comprising:

[0006] an operating unit, disposed on a housing of the medical device, wherein the operating unit can move a first distance under the action of an external force; and

[0007] A transmission unit is connected to the operating unit, and the transmission unit includes an active member, a fixed member and a driven member, wherein the active member is respectively connected to the fixed member and the driven member, the driven member is connected to a working module, and the fixed member is fixedly arranged on the shell; wherein the active member is connected to the operating unit and moves a second distance along the fixed member under the drive of the operating unit, and the driven member can move a third distance under the drive of the active member, and the third distance is greater than the first distance and greater than the second distance.

[0008] In one embodiment, the follower and the fixed member are racks of different lengths, the follower and the fixed member are parallel and spaced apart, the active member is a gear meshed with the racks respectively; the total length of the fixed member limits the upper limit of the second distance, and the total length of the follower limits the upper limit of the third distance.

[0009] In one embodiment, the third distance is at least twice the second distance.

[0010] In one embodiment, the adjustment module also includes a bracket unit and a rotating shaft arranged on the center line of the active member, one end of the bracket unit is connected to the operating unit, and the other end is connected to the rotating shaft of the active member, the operating unit can slide the first distance along the first direction along the shell, the active member rotates around the rotating shaft and moves the second distance along the first direction on the fixing member, and the first distance is equal to the second distance.

[0011] In one embodiment, the bracket unit includes a first bracket and a second bracket, the first bracket is sleeved on the outside of the active component, two ends of the rotating shaft are connected to the first bracket, and the second bracket connects the first bracket and the operating unit.

[0012] In one embodiment, the fixing member is integrally formed with the shell.

[0013] In one embodiment, the operating unit includes an operating part and an electric plug, the operating part forms a receiving cavity connected to the shell, the electric plug is arranged in the receiving cavity, and the electric plug can follow the movement of the operating part and be electrically connected to the transmission unit.

[0014] In one embodiment, the fixing member is used to fix one end of the active member, the active member and the driven member can rotate around the fixing member synchronously, and the driven member is arranged away from the fixing member relative to the active member; the driven member is connected to a working module, and the driven member can move a third distance under the drive of the active member.

[0015] On the one hand, a medical device is provided, which adopts the above-mentioned adjustment module.

[0016] In one embodiment, the medical device is a snare, which further includes a shell and a working module, the working module including a cable and a ferrule provided on the shell, the proximal end of the cable is connected to a follower so that the cable follows the follower to move relative to the shell, and the distal end of the cable is connected to the ferrule.

[0017] By adopting the above-mentioned adjustment module, when the operating unit moves a first distance in a first direction relative to the operating handle, due to the structure of the transmission unit, the driven member connected to the working module can move a third distance under the drive of the active member, and the third distance is greater than the first distance and greater than the second distance, so that a larger moving distance of the working module can be achieved with a smaller operating amplitude, which saves the operator's operating actions and has a wider range of applicability to various types of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of a snare in one embodiment of the present application.

[0019] Figure 2 Schematic diagram of the cross-sectional structure of an adjustment module for a snare in one embodiment of the present application.

[0020] Figure 3 for Figure 2 A schematic enlarged view of the part at point A.

[0021] Figure 4 Schematic diagram of the structure of the active component and the bracket unit in one embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0026] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0028] See also Figures 1 to 4 , Figure 2 The schematic diagram of the structure of the adjustment module 100 for medical devices in one embodiment of the present application is shown. The medical device provided in one embodiment of the present application can be used together with an endoscope or can be used alone. In particular, it can be a snare 10 for removing part of the tissue, such as Figure 1This article takes the snare 10 as an example for description, and the adjustment module 100 is applied in the snare 10 .

[0029] like Figure 1 , Figure 2 As shown, the snare 10 includes a housing and a working module, the housing includes an operating handle 11, an insertion portion 12 and a catheter 13, and the working module includes a cable 15 and a ferrule 14 provided on the housing. The catheter 13 is formed into an elongated tubular shape by a flexible insulator, and the catheter 13 can be passed through the instrument through-channel in the insertion portion 12. The working module is provided in the catheter 13, and a part of the working module extends out from the distal end of the catheter 13. The operating handle 11 is provided on the proximal end of the catheter 13. The cable 15 and the ferrule 14 can be conductive, and the ferrule 14 is annular, and the annular ferrule 14 can change shape to open or close, and the cable 15 and the ferrule 14 are fixed by a conductive connection joint.

[0030] The adjustment module 100 is arranged in the housing, and most of it is arranged at the operating handle 11. Part of the structure of the adjustment module 100 is slidably arranged on the operating handle 11 of the housing, and the adjustment module 100 is connected to the working module. When the part of the structure of the adjustment module 100 slides relative to the housing, the working module moves axially inside the catheter 13 (inside the lumen).

[0031] See also Figure 3 , Figure 3 Shows Figure 2 The enlarged structural diagram of the part at A in the middle shows that the adjustment module 100 includes an operating unit 110 and a transmission unit 120. The operating unit 110 is arranged in the housing of the medical device, and the operating unit 110 can move a first distance under the action of an external force. The transmission unit 120 is connected to the operating unit 110, and the transmission unit 120 includes an active member 122, a fixed member 121 and a driven member 123. The active member 122 is respectively connected to the fixed member 121 and the driven member 123 by transmission. The driven member 123 is connected to the working module, and the fixed member 121 is fixedly arranged on the housing. Among them, the active member 122 is connected to the operating unit 110 by transmission and moves a second distance along the fixed member 121 under the drive of the operating unit 110, and the driven member 123 can move a third distance under the drive of the active member 122, and the third distance is greater than the first distance and greater than the second distance.

[0032] The operating unit 110 is disposed at the operating handle 11 and has a portion that can be operated by an external user or tool. The operated operating unit 110 slides a first distance along the housing. The transmission unit 120 is disposed in the operating handle 11, connecting the operating unit 110 and the proximal end of the cable 15, and the distal end of the cable 15 is provided with a collar 14. When the cable 15 is driven by the transmission unit 120, the collar 14 can move along the axial direction of the catheter 13.

[0033] When the snare 10 is used, a high frequency generator is connected, and the catheter 13 is inserted into the treatment instrument through-channel of the insertion part 12. The distal end of the insertion part 12 of the snare 10 is inserted into the body cavity, so that the catheter 13 is inserted into the body cavity. The distal end of the catheter 13 is extended from the distal end of the insertion part 12, and the ferrule 14 is extended from the distal end of the catheter 13. The operating unit 110 is moved relative to the operating handle 11 along the axial direction (first direction) for a first distance. The pull cable 15 moves forward along the first direction relative to the catheter 13. In this way, the ferrule 14 extending from the front end of the catheter 13 is automatically opened by its elastic force to form a ring shape. The direction of the ferrule 14 is adjusted to a direction that is easy to be put on the polyp, and the ferrule 14 is easily and reliably put on the polyp. In this state, the operating unit 110 is moved relative to the operating handle 11 in the direction opposite to the first direction for a certain distance, so that the diameter of the ferrule 14 gradually decreases and the polyp is tightened.

[0034] In the above process, when the operating unit 110 moves a first distance along the first direction relative to the operating handle 11, due to the structure of the transmission unit 120, the follower member 123 connected to the working module can move a third distance under the drive of the active member 122. The third distance is greater than the first distance and greater than the second distance, so that a larger moving distance of the working module can be achieved with a smaller operating amplitude, which saves the operator's operating actions and has a wider range of applicability to various types of operators.

[0035] In one embodiment, the driven member 123 and the fixed member 121 are racks of different lengths, the driven member 123 and the fixed member 121 are arranged in parallel and at intervals, and the active member 122 is a gear respectively meshed with the racks; the total length of the fixed member 121 defines the upper limit of the second distance, and the total length of the driven member 123 defines the upper limit of the third distance. Further, the third distance is at least twice the second distance.

[0036] Specifically, the driven member 123 and the fixed member 121 are arranged inside the operating handle 11 of the housing in a spaced and parallel manner along the first direction, the teeth on the driven member 123 and the fixed member 121 are arranged facing each other, and the active member 122 is respectively engaged with the teeth of the driven member 123 and the fixed member 121 arranged facing each other. When the operating unit 110 is driven to move, the active member 122 is driven to rotate along the teeth of the fixed member 121, and the active member 122 drives the driven member 123 engaged on the other side to move a third distance, so that the stroke is magnified at least twice. When the gear rotates counterclockwise in the embodiment shown in the figure, the driven member 123 moves relative to the operating handle 11 by a third distance in the first direction, and when the gear rotates clockwise in the embodiment shown in the figure, the driven member 123 moves relative to the operating handle 11 by a third distance in the direction opposite to the first direction.

[0037] In one embodiment, the fixing member 121 is integrally formed with the housing. In other embodiments, the fixing member 121 and the housing are independent structures, and the fixing member 121 is fixed inside the housing.

[0038] In one embodiment, the adjustment module 100 also includes a bracket unit 130 and a rotating shaft 124 arranged on the center line of the active member 122, one end of the bracket unit 130 is connected to the operating unit 110, and the other end is connected to the rotating shaft 124 of the active member 122, the operating unit 110 can slide the first distance along the first direction along the shell, and the active member 122 rotates around the rotating shaft 124 and moves the second distance along the first direction on the fixing member 121.

[0039] Furthermore, the bracket unit 130 includes a first bracket 131 and a second bracket 132. The first bracket 131 is sleeved on the outside of the active component 122 and does not contact the active component 122 to avoid hindering the rotation of the active component 122. The two ends of the rotating shaft 124 are connected to the first bracket 131, and the second bracket 132 is connected to the first bracket 131 and the operating unit 110.

[0040] like Figure 4 As shown, specifically, the rotating shaft 124 is arranged in a direction perpendicular to the first direction, and the two ends of the rotating shaft 124 extend from the active member 122 to connect the bracket unit 130. The first bracket 131 is arched, and the first bracket 131 includes two first parts arranged at the two end surfaces of the active member 122 and a second part connected to the first parts, and the second part corresponds to the peripheral side surface surrounding the active member 122. One end of the two first parts is connected to the two ends of the rotating shaft 124, and the other end of the two first parts is connected to the two ends of the second part. The second bracket 132 is rod-shaped, and the second bracket 132 is arranged in the middle of the second part and arranged along the first direction.

[0041] In some embodiments, the operating unit 110 includes an operating portion 111 and an electric plug 113. The operating portion 111 forms a receiving cavity 112 connected to the housing. The electric plug 113 is disposed in the receiving cavity 112. The electric plug 113 can move with the operating portion 111 and is electrically connected to the transmission unit 120, and then electrically connected to the working module. The electric plug 113 is used to connect an external high-frequency generator, and the high-frequency generator supplies power to the snare 10 to remove the corresponding tissue. In this state, the high-frequency current moves from the high-frequency generator to the electric plug 113, and the high-frequency current flows from the electric plug 113 to the ferrule 14 via the transmission unit 120 and the cable 15. Finally, the polyp is removed, and after the polyp is removed, the supply of the high-frequency current is stopped.

[0042] The electric plug 113 is arranged in a direction perpendicular to the first direction, and extends from the opening of the operating portion 111 to the accommodating cavity 112 and the operating handle 11, and passes through the operating handle 11 to connect with the second bracket 132 of the bracket unit 130. The driven member 123 or the fixing member 121 is arranged to avoid the electric plug 113.

[0043] The operating portion 111 is cylindrical and is directly sleeved on the outer surface of the operating handle 11. The operating unit 110 further includes an annular portion parallel to the operating portion 111. The annular portion is used to place the index finger and the middle finger, etc., for the convenience of user operation.

[0044] In other embodiments, the snare 10 is not provided with the electric plug 113 , and a structure for connecting the bracket unit 130 is provided in the operating portion 111 .

[0045] In one of the embodiments, which is not shown in the figure, the fixing member is used to fix one end of the active member, the active member and the driven member can rotate around the fixing member synchronously, and the driven member is arranged away from the fixing member relative to the active member; the driven member is connected to the working module, and the driven member can move a third distance under the drive of the active member.

[0046] Specifically, the fixed part serves as the rotation center of the active part, and the transmission unit also includes a swing arm, which connects the fixed part, the driven part, and the active part together, so that the driven part and the active part rotate synchronously around the fixed part as the center of the circle. The active part and the driven part are fixed in a track set along the first direction, and the external force directly drives the active part through the swing arm and the fixed part. The swing arm swings around the fixed part and drives the driven part to move a third distance along the first direction. Since the driven part is farther away from the center of the circle (fixed part) than the active part, when the active part moves the second distance, the third distance moved by the driven part in the outer circle is greater than the second distance, achieving the result of stroke amplification.

[0047] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An adjustment module for medical equipment, characterized in that: The adjustment module comprises: an operating unit, disposed on a housing of the medical device, wherein the operating unit can move a first distance under the action of an external force; and A transmission unit is connected to the operating unit, and the transmission unit includes an active member, a fixed member and a driven member, wherein the active member is respectively connected to the fixed member and the driven member, the driven member is connected to a working module, and the fixed member is fixedly arranged on the shell; wherein the active member is connected to the operating unit and moves a second distance along the fixed member under the drive of the operating unit, and the driven member can move a third distance under the drive of the active member, and the third distance is greater than the first distance and greater than the second distance.

2. The adjustment module for medical equipment according to claim 1, characterized in that: The driven member and the fixed member are racks of different lengths, the driven member and the fixed member are parallel and spaced apart, the active member is a gear respectively meshed with the racks; the total length of the fixed member limits the upper limit of the second distance, and the total length of the driven member limits the upper limit of the third distance.

3. The adjustment module for medical equipment according to claim 2, characterized in that: The third distance is at least twice the second distance.

4. The adjustment module for medical equipment according to claim 2, characterized in that: The adjustment module also includes a bracket unit and a rotating shaft arranged on the center line of the active member, one end of the bracket unit is connected to the operating unit, and the other end is connected to the rotating shaft of the active member, the operating unit can slide the first distance along the first direction along the shell, and the active member rotates around the rotating shaft and moves the second distance along the first direction on the fixing member.

5. The adjustment module for medical equipment according to claim 4, characterized in that: The bracket unit includes a first bracket and a second bracket. The first bracket is sleeved on the outside of the active component. Both ends of the rotating shaft are connected to the first bracket. The second bracket connects the first bracket and the operating unit.

6. The adjustment module for medical equipment according to claim 2, characterized in that: The fixing member is integrally formed with the shell.

7. The adjustment module for medical equipment according to claim 1, characterized in that: The operating unit includes an operating portion and an electric plug. The operating portion forms a receiving cavity communicating with the housing. The electric plug is disposed in the receiving cavity. The electric plug can move with the operating portion and is electrically connected to the transmission unit.

8. The adjustment module for medical equipment according to claim 1, characterized in that: The fixing member is used to fix one end of the active member, the active member and the driven member can rotate around the fixing member synchronously, and the driven member is arranged away from the fixing member relative to the active member; the driven member is connected to the working module, and the driven member can move a third distance under the drive of the active member.

9. A medical device, characterized in that: Adopt the adjustment module described in any one of claims 1-8.

10. The medical device according to claim 9, characterized in that: The medical device is a snare, and further comprises a shell and a working module, wherein the working module comprises a cable and a ferrule arranged on the shell, wherein the proximal end of the cable is connected to a follower so that the cable follows the follower to move relative to the shell, and the distal end of the cable is connected to the ferrule.

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