Traction wire tension control mechanism and split endoscope

Abstract

The utility model relates to medical instrument technical field, concretely discloses a traction wire tension control mechanism and split type endoscope, including rotation base and tension mechanism, a pair of traction wire pedestals are rotatoryly arranged on the rotation base, the tension mechanism includes the first gear and the second gear respectively arranged in a pair of traction wire pedestals upper end and the drive gear that can move up and down, the first gear is with second gear and is misaligned to set in height direction, the drive gear has the first state with the first gear engagement and the second state with the second gear engagement, in the utility model, ingeniously utilize single drive source, and drive gear can be time-sharing, respectively with two gear engagement, to realize the independent and according to the order accurate tension control of two traction wires, ensure the consistency and reliability of tension, to guarantee that split type endoscope can also have the control feeling, accuracy and bending part keeping ability comparable with integrated endoscope.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to the field of endoscope technology, and in particular to a traction wire tension control mechanism and a split endoscope. Background Technology

[0002] An endoscope is a medical device used to visualize internal cavities or organs of the human body. It consists of a flexible or rigid tubular structure, an imaging system, and auxiliary tools. It enters the body through natural orifices (such as the mouth or nose) or tiny incisions to assist doctors in diagnosis or surgical procedures.

[0003] Traditional endoscopes have a one-piece structure, meaning the operating part and the interventional part are inseparable. Since endoscopes are interventional medical devices, disposable endoscopes are discarded entirely after use; non-disposable endoscopes require sterilization after use. This results in high usage and maintenance costs.

[0004] Based on this, some endoscopes with detachable operating and interventional sections have appeared on the market. After each treatment, the interventional and operating sections are separated, a new interventional section is installed, and the operating section is reused. In this way, only the interventional section needs to be replaced or disinfected, greatly reducing the cost of use and maintenance.

[0005] For split-type endoscopes, the traction wire in the operating section is disconnected from the traction wire in the interventional section. Therefore, how to tension the traction wire after it is connected between the operating and interventional sections is crucial, as the tension of the traction wire directly affects the control accuracy of the endoscope. However, in existing split-type endoscopes, the tension of the traction wire is controlled by the connection structure between the traction wires, and the tension of the traction wire cannot be controlled independently. Utility Model Content

[0006] The technical problem to be solved by this invention is to overcome the technical defect that the tension of the traction wire in the existing split endoscope cannot be controlled independently.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a traction wire tension control mechanism, comprising a rotating base; a pair of traction wire bases for connecting traction wires are provided on the rotating base, the traction wire bases being rotatably connected to the rotating base; It also includes a tensioning mechanism for driving the rotation of the traction wire base, the tensioning mechanism including a first gear and a second gear respectively disposed on the upper ends of a pair of traction wire bases, and a drive gear that can move up and down; the first gear and the second gear are offset in the height direction; the drive gear has a first state of meshing with the first gear and a second state of meshing with the second gear.

[0008] In a preferred embodiment, the tensioning mechanism further includes a gear push rod for mounting the drive gear, a rotating shaft is provided on the rotating base, the gear push rod is sleeved on the rotating shaft and can rotate and move vertically relative to it; a first return spring is provided between the gear push rod and the rotating base to keep the drive gear in a high position in its natural state.

[0009] In a preferred embodiment, the upper end of the gear push rod is connected to a tension knob for controlling its rotation.

[0010] In a preferred embodiment, the traction wire base is provided with a fixing hole for connecting the traction wire.

[0011] In a preferred embodiment, the device further includes a locking mechanism for locking the traction wire base in a tensioned position; the locking mechanism includes a first ratchet and a second ratchet respectively disposed at the lower ends of a pair of traction wire bases, and a first pawl and a second pawl respectively adapted to the first ratchet and the second ratchet; the first pawl and the second pawl are rotatably connected to the rotating base.

[0012] In a preferred embodiment, the first pawl and the second pawl are provided with intermeshing linkage teeth; a second return spring is provided between the first pawl or the second pawl and the rotating base, for keeping the first pawl and the second pawl in the position of stopping the first ratchet and the second ratchet.

[0013] In a preferred embodiment, the device further includes an unlocking mechanism for disengaging the pawl from the ratchet; the unlocking mechanism includes an unlocking rod sleeved on the gear push rod, a swing rod extending toward the pawl is provided on one side of the unlocking rod, a swing protrusion acting on the pawl is provided at the lower end of the swing rod, and an unlocking knob is connected to the upper end of the unlocking rod.

[0014] In a preferred embodiment, the upper end of the unlocking knob is provided with a receiving groove for accommodating the tensioning knob.

[0015] This embodiment also discloses a split-type endoscope, which includes at least an operating part, an intervention part, and the aforementioned traction wire tensioning control mechanism. The distal end of the operating part is detachably connected to the proximal end of the intervention part. The operating part includes at least an operating part body, a rotating platform disposed inside the operating part body, and a handle disposed outside the operating part body for controlling the rotation of the rotating platform.

[0016] In a preferred embodiment, a limiting groove is provided on the main body of the operating part, and a limiting block is provided at the bottom of the unlocking knob. The limiting block extends into the limiting groove to limit the rotation angle of the unlocking knob.

[0017] Compared with the prior art, the traction wire tension control mechanism and the split endoscope of this utility model have the following advantages: (1) By staggering the first and second gears of the two traction wire bases in the height direction and cooperating with a drive gear that can move up and down, a single drive source can be used to mesh with the two gears in time and separately, thereby realizing independent and sequential precise tension control of the two traction wires, ensuring the consistency and reliability of the tension force.

[0018] (2) The drive gear is integrated and installed through the gear push rod, and its automatic reset in normal state (high position first state) is achieved by the first reset spring. This design integrates the two motion modes of rotation and vertical movement into one component, making the entire tensioning mechanism compact and reasonably laid out, which is very suitable for the limited space inside the endoscope operating section.

[0019] (3) By setting a locking mechanism consisting of ratchet and pawl, the unidirectional locking of the tensioned traction wire base is realized, which effectively prevents the bending part from deforming and failing due to the rebound of the traction wire during operation, and greatly enhances the stability and safety of equipment operation.

[0020] (4) By setting intermeshing linkage teeth between the first pawl and the second pawl, and equipping them with a second return spring, the two pawls can move synchronously. This design ensures that the locking state of the two traction wires can be released at the same time with one unlocking action, making the operation simple and quick and improving work efficiency.

[0021] (5) The tension control mechanism of the traction wire is applied to the operating part of the split endoscope so that after the intervention part is replaced, the traction wire can be quickly and easily re-tensioned and reliably locked, thereby ensuring that the split endoscope can also have the same operating feel, precision and bending part retention as the integrated endoscope, while taking into account the convenience of disinfection and maintenance brought by the split design. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the structure of the split endoscope in this embodiment, where the operating part and the interventional part are in a separated state; Figure 2 This is a three-dimensional structural diagram of the operating section in the split-type endoscope of this embodiment; Figure 3 for Figure 2 A schematic diagram of the operating unit from another perspective; Figure 4 for Figure 3 A schematic diagram of the unlocking knob in the operating section in the disengaged state is shown. Figure 5 This is a schematic diagram of the unlocking knob in the operating section of this embodiment; Figure 6 This is a schematic diagram of the internal structure of the operating unit in this embodiment; Figure 7 This is a schematic diagram of the structure of the second sliding body in the operating section of this embodiment; Figure 8 This is a partial cross-sectional view of the location of the rotating base in the operating section of this embodiment; Figure 9 This is a three-dimensional structural diagram of the traction wire tension control mechanism in the operation unit of this embodiment, wherein the drive gear is in the first state and meshes with the first gear; Figure 10 This is a three-dimensional structural diagram of the traction wire tension control mechanism in the operation unit of this embodiment, wherein the drive gear is in the second state and is engaged with the second gear; Figure 11 for Figure 9 The diagram shows a structure in which the pawl and ratchet are separated. Figure 12 This is a three-dimensional structural diagram of the interventional section in the split-type endoscope of this embodiment; Figure 13 for Figure 12 The diagram shows another view of the interventional part, in which the limiting insert is in the pulled-out state; Figure 14 for Figure 12 The diagram shows the internal structure of the interventional section; Figure 15 This is a schematic diagram of the structure of the first sliding body in the intervention section of this embodiment; Figure 16 This is a schematic diagram of the structure of the split endoscope in this embodiment before the operating part and the interventional part are connected; Figure 17 This is a schematic diagram showing the state in which the guide pin enters the guide hole during the docking of the operating part and the intervention part of the split endoscope in this embodiment. Figure 18This is a structural diagram showing the state in which the male and female buckles are fully engaged during the docking process of the operating part and interventional part of the split endoscope in this embodiment. Figure 19 This is a schematic diagram showing the structure of the split endoscope in this embodiment, during the docking process between the operating part and the intervention part, in which the limiting steel ball disengages from the second limiting groove and enters the groove on the guide pin, thus releasing the initial limiting state of the second sliding body. Figure 20 This is a structural diagram showing the completed docking state of the main body of the operating unit and the main body of the interventional unit during the docking process of the split endoscope in this embodiment. Figure 21 To be Figure 20 A schematic diagram of the structure after the limit insert is pulled out in the current state; Figure 22 This is a schematic diagram of the structure after the two traction wires are tensioned sequentially by the tensioning mechanism; Figure 23 This is a schematic diagram illustrating how the bending state of the interventional section is achieved by rotating the handle during the operation of the split endoscope in this embodiment. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] like Figure 1As shown, this embodiment of a split-type endoscope includes a detachably connected operating part 10 and an interventional part 20, wherein the distal end of the operating part 10 is detachably connected to the proximal end of the interventional part 20. The operating part 10 is held by the operator for diagnostic and treatment operations, while the interventional part 20 is provided with corresponding structures that can enter the patient's body. These structures are conventional structures of endoscopes and will not be described in detail in this embodiment.

[0027] In this embodiment, a docking structure is provided between the distal end of the operating part 10 and the proximal end of the intervention part 20. Preferably, as follows... Figure 14 As shown, in this embodiment, the interventional portion 20 includes an interventional portion body 21, on which a pair of first sliding cavities 23 are provided. The first sliding cavities 23 extend distally from the proximal end of the interventional portion body 21. A pair of first sliding bodies 22 are slidably connected within the first sliding cavities 23, as shown... Figure 14 , Figure 15 As shown, the first sliding body 22 has a first latch at its proximal end, an intervention traction wire 24 connected to its distal end, and a first limiting groove 221 on its outer wall.

[0028] like Figures 13-15 As shown, the intervention part 20 is provided with a slot 26 extending from the outer wall of the intervention part body 21 to the first sliding cavity 23, and also includes a limiting insert 27. In the initial state before the operation part 10 is connected to the intervention part 20, the insertion end 271 of the limiting insert 27 is inserted from the outside of the intervention part body through the slot 26 into the first limiting groove 221 on the first sliding body 22. The first limiting groove 221, the slot 26, and the limiting insert 27 constitute the first initial limiting mechanism of this embodiment, used to initially limit the first sliding body 22.

[0029] Preferably, in this embodiment, the first latch is a male latch, including a latch post 223 and a latch head 222 disposed at the free end of the latch post, wherein the radial dimension of the latch head 222 is larger than the radial dimension of the latch post 223. Preferably, the proximal end of the latch head 222 is provided with a guide slope to facilitate docking with the female latch, and the distal end of the latch head 222 is also provided with a guide slope to facilitate separation from the female latch.

[0030] In this embodiment, as Figure 6 As shown, the operation part 10 includes an operation part body 11, on which a pair of second sliding cavities 158 are provided. The second sliding cavities 158 extend from the distal end of the operation part body 11 to the proximal end, and the second sliding cavities 158 are continuous with the first sliding cavity 23 in the length direction.

[0031] In this embodiment, a pair of second sliding bodies 15 are slidably connected within the second sliding cavity 158, such as... Figure 6 , Figure 7 As shown, the distal end of the second sliding body 15 is provided with a second latch for detachable connection with the first latch, and the proximal end of the second sliding body 15 is connected with an operating part traction wire 17.

[0032] In this embodiment, a pair of spring cavities 154 are also provided adjacent to the second sliding cavity 158, and a through groove 157 is provided between the spring cavity 154 and the adjacent second sliding cavity 158.

[0033] In this embodiment, as Figure 6 , Figure 7 As shown, it also includes a pair of sliders 152, which are slidably connected within the spring cavity 154. A first spring 155 and a second spring 156 are respectively provided at both ends of each slider 152. The sliders 152 and the second sliding body 15 are connected by a connecting portion 153 passing through the through slot 157. Thus, through the interaction of the first spring 155 and the second spring 156, the second sliding body 15 is held in a corresponding position. When the position of the second sliding body 15 changes under the action of an external force, it can be reset by the first spring 155 and the second spring 156 after the external force is released.

[0034] Preferably, in this embodiment, the second latch is a female latch that is adapted and connected to the male latch on the first sliding body. For example... Figure 7 As shown, the female buckle includes an elastic opening 1510 for accommodating the locking head 222 and a locking cavity 159 for fitting with the locking head. The locking cavity 159 contains a displacement space to accommodate the axial displacement of the locking head 222.

[0035] It should be noted that, in this embodiment, although the male buckle is set on the first sliding body and the female buckle is set on the second sliding body, as an equivalent implementation, the positions of the male buckle and the female buckle can be interchanged.

[0036] Preferably, a guide mechanism is also provided between the operating part body 11 and the intervention part body 21. Figure 6 , Figure 13 , Figure 14As shown, a guide hole 25 is provided at the center of the intervention part 20, extending axially from the proximal end face of the intervention part body 21 to the distal end. A guide pin hole 162, coaxial with the guide hole 25, is provided at the center of the operating part 10, extending axially from the distal end face of the operating part body 11 to the proximal end. A guide pin 16 is slidably connected within the guide pin hole 162, and a guide spring 163 is provided at the proximal end of the guide pin 16 for resetting after the position of the guide pin 16 changes.

[0037] In this embodiment, as Figure 6 , Figure 7 As shown, the second sliding body 15 is provided with a second limiting groove 151, and also includes a pair of limiting through holes 164, which are respectively disposed between a pair of second sliding cavities 158 and guide pin holes 162, and a pair of limiting steel balls 165, which are respectively located in the limiting through holes 164. In the initial state, the outer wall of the guide pin 16 presses the limiting steel balls 165 into the second limiting groove 151, thereby forming the second initial limiting mechanism of this embodiment, which is used to initially limit the second sliding body 15.

[0038] In this embodiment, as Figure 6 , Figure 7 As shown, the guide pin 16 is provided with a groove 161 for accommodating the limiting steel ball 165. By pushing the guide pin 16, the limiting steel ball 165 is adapted to the groove 161, and the limiting steel ball 165 disengages from the second limiting groove 151, thereby releasing the initial limiting of the second sliding body 15.

[0039] In this embodiment, a locking structure is also provided between the operation part 10 and the intervention part 20, which is used to lock the operation part 10 and the intervention part 20 into one unit after the operation part 10 and the intervention part 20 are docked.

[0040] As a preferred embodiment, in this case, Figure 2 , Figure 12 As shown, the locking structure includes a plug-in part 18, a plug-in groove 28, a slot 281, and an unlocking elastic arm 282.

[0041] The plug-in portion 18 protrudes from the distal end face of the operation portion 10 and includes a rigid plug-in arm 181 and an elastic plug-in arm 182. The distal end of the elastic plug-in arm 182 is provided with a snap-fit ​​protrusion 183.

[0042] The insertion groove 28 for accommodating the insertion part 18 extends from the proximal end face of the intervention part 20 to the distal end, and the insertion groove 28 has space to accommodate the deformation of the elastic insertion arm 182.

[0043] The slot 281 extends from the outer wall of the interventional part body 21 to the insertion groove 28, forming a slot wall that fits and abuts against the locking protrusion 183. During the docking process between the insertion part and the interventional part, the insertion part 18 enters the insertion groove 28. During the insertion process, the elastic insertion arm 182 deforms. When the locking protrusion 183 passes the slot wall, the elastic insertion arm 182 returns to its original position, and the locking protrusion 183 enters the slot 281, abutting against the slot wall, thereby achieving locking between the insertion part and the interventional part.

[0044] In this embodiment, the unlocking elastic arm 282 is disposed on the outer wall of the intervention part body 21 and extends above the slot 281. When it is necessary to separate the operation part from the intervention part, by pressing the unlocking elastic arm 282, the locking protrusion 183 is pressed into the insertion slot 28, and then force is applied to both sides to separate the operation part from the intervention part.

[0045] As a special feature of this embodiment, the split endoscope of this embodiment also includes a traction wire tension control mechanism for controlling the tension of the traction wire. In this embodiment, as... Figure 2 , Figure 6 , Figures 8-10 As shown, it also includes a rotating base 30 disposed inside the main body 11 of the operating part and a handle 12 disposed outside the main body 11 of the operating part for controlling the rotation of the rotating base 30, wherein the handle 12 is connected to a rotating shaft 31 disposed at the bottom of the rotating base 30.

[0046] In this embodiment, the traction wire tensioning control mechanism includes a pair of traction wire bases 40 disposed on the rotating base 30 for connecting the traction wire 17 of the operating part. The traction wire base 40 is provided with a fixing hole 41 for connecting and fixing the traction wire 17 of the operating part.

[0047] In this embodiment, the traction wire base 40 is rotatably connected to the rotating base 30. Preferably, the bottom of the traction wire base 40 is provided with a pin 401, and the rotating base 30 is provided with a pin hole adapted to the pin, thereby realizing the rotatable connection of the traction wire base 40.

[0048] As a special feature of this embodiment, the traction wire tensioning control mechanism is also provided with a tensioning mechanism for driving the traction wire base 40 to rotate. When the operating part engages with the intervention part, the traction wire is tensioned by the tensioning mechanism, thereby ensuring that the bending movement of the bending part can be precisely controlled.

[0049] In this embodiment, as Figures 8-10As shown, the tensioning mechanism includes a first gear 42, a second gear 43, and a drive gear 133. The first gear 42 is disposed on the upper end of one of the traction wire bases 40, and the second gear 43 is disposed on the upper end of the other traction wire base 40. A special feature of this embodiment is that the first gear 42 and the second gear 43 are offset in the height direction. Correspondingly, the drive gear 133 has... Figure 9 The first state of meshing with the first gear 42 shown and Figure 10 The second state shown is the engagement of the second gear 43.

[0050] like Figures 8-10 As shown, the tensioning control mechanism for the traction wire in this embodiment further includes a gear push rod 131 for mounting the drive gear 133. A rotating shaft 32 is provided on the rotating base 30, and the gear push rod 131 has a shaft hole 132 adapted to the rotating shaft 32. The gear push rod 131 is sleeved on the rotating shaft 32 and can rotate relative to the rotating shaft 32 and move vertically relative to the rotating shaft. Furthermore, a first return spring 33 is provided between the gear push rod 131 and the rotating base 30. In its natural state, under the action of the first return spring 33, the drive gear 133 is in a high position (first state). When an external force is applied to bring the drive gear 133 to a low position (second state), the first return spring 33 is compressed. After the external force is released, the drive gear 133 returns to the first state.

[0051] As a special feature of this embodiment, such as Figures 3-4 , Figure 8 As shown, the upper end of the gear push rod 131 is connected to a tension knob 13, which controls the drive gear 133 to drive the first gear and the second gear to rotate respectively.

[0052] In this embodiment, after the operating unit and the intervention unit are docked, firstly, the tension knob 13 is rotated to tension the traction wire connected to the traction wire base where the first gear is located. Next, the tension knob 13 is pressed to engage the drive gear with the second gear. Then, the tension knob 13 is rotated again to tension the traction wire connected to the traction wire base where the second gear is located. After the traction wire is tensioned, its state is basically the same as that of the traction wire in a traditional integrated endoscope, resulting in more precise control.

[0053] The tension control mechanism for the traction wire in this embodiment further includes a locking mechanism for locking the traction wire base 40 in the tensioned position. As a special feature of this embodiment, the locking mechanism includes a ratchet and a pawl. Figures 8-10As shown, the ratchet includes a first ratchet 44 and a second ratchet 45 respectively disposed at the lower end of the traction wire base 40. Correspondingly, the pawl includes a first pawl 46 adapted to the first ratchet 44 and a second pawl 47 adapted to the second ratchet 45, and the first pawl 46 and the second pawl 47 are rotatably connected to the rotating base 30.

[0054] In this embodiment, the locking mechanism consisting of the ratchet and pawl can achieve one-way locking of the traction wire base 40. That is, after rotating the tension knob 13, the corresponding traction wire base 40 cannot rotate in the opposite direction and is limited to the locked position.

[0055] As a special feature of this embodiment, the first pawl 46 and the second pawl 47 are provided with intermeshing linkage teeth 48, and a second return spring 49 is provided between one of the pawls and the rotating base 30. Based on the elastic force of the second return spring 49, the first pawl 46 and the second pawl 47 are held in the position of stopping the first ratchet 44 and the second ratchet 45.

[0056] As a special feature of this embodiment, the traction wire tensioning control mechanism also includes an unlocking mechanism for disengaging the pawl from the ratchet. In this embodiment, as... Figures 8-11 As shown, the unlocking mechanism includes an unlocking rod 145 sleeved on the gear top rod 131. A swing rod 146 extending towards the pawl is provided on one side of the unlocking rod 145. A swing protrusion 147 for acting on one of the pawls is provided at the lower end of the swing rod 146.

[0057] like Figures 3-5 As shown, in this embodiment, the upper end of the unlocking rod 145 is connected to an unlocking knob 14. The center of the unlocking knob 14 is provided with a connecting hole 142 for connecting with the unlocking rod 145, the upper end of the unlocking knob 14 is provided with a receiving groove 141 for accommodating the tensioning knob 13, and the upper end of the unlocking knob 14 is also provided with a protruding rib 143 for facilitating the application of rotational force.

[0058] As a special feature of this embodiment, in order to limit the rotation angle of the unlocking knob 14, a limiting groove 111 is provided on the main body 11 of the operating part, and correspondingly, a limiting block 144 is provided at the bottom of the unlocking knob 14 that extends into the limiting groove 111.

[0059] When the split endoscope of this embodiment is no longer in use and it is necessary to separate the operating part from the interventional part, first release the tension of the traction wire. For example... Figure 11As shown, rotating the unlocking knob 14 drives the swinging protrusion 147 to apply pressure to the second pawl 47, causing the second pawl 47 to swing and release the lock on the second ratchet 45. Based on the interaction of the linkage teeth 48, when the second pawl 47 swings, it drives the first pawl 46 to swing, releasing the lock on the first ratchet 44, wherein the second return spring 49 is compressed. After the tension of the traction wire is released, the separation action of the operating part and the intervention part can be performed.

[0060] In this embodiment of the split endoscope, the docking process between the operating part 10 and the intervention part 20 is as follows: like Figure 16 As shown, in the initial state, based on the first initial limiting mechanism and the second initial limiting mechanism, the first sliding body in the intervention part and the second sliding body in the operation part are initially limited.

[0061] like Figure 17 As shown, during the docking process between the operating unit and the interventional unit, the guide pin first enters the guide hole, which guides the docking process between the interventional unit and the operating unit.

[0062] like Figure 18 As shown, in Figure 17 Based on the state shown, continue to bring the intervention part and the operation part closer together, and the guide pin enters the bottom of the guide hole, and the male and female threads are connected.

[0063] like Figure 19 As shown, in Figure 18 Based on the state shown, continue to bring the intervention part and the operation part closer together, push the guide pin to move towards the proximal end, and the limiting steel ball disengages from the second limiting groove and enters the groove on the guide pin, releasing the initial limiting state of the second sliding body.

[0064] like Figure 20 As shown, in Figure 19 Based on the state shown, continue to bring the intervention unit and the operating unit closer together, and the main body of the operating unit and the main body of the intervention unit are docked, and the locking mechanism is locked.

[0065] like Figure 21 As shown, in Figure 20 After the main body of the operating unit and the main body of the intervention unit are connected, the limiting insert is pulled out based on the state shown.

[0066] like Figure 22 As shown, in Figure 21 Based on the state shown, the two traction wires are tensioned sequentially by the tensioning mechanism.

[0067] like Figure 23As shown, in this embodiment, the split endoscope bends by rotating the handle to control the bending structure on the intervention section during operation. During this process, the components consisting of the two sets of first and second sliding bodies are misaligned in the axial direction.

[0068] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tension control mechanism for traction wire, comprising a rotating base (30); characterized in that: The rotating base (30) is provided with a pair of traction wire bases (40) for connecting traction wires, and the traction wire bases are rotatably connected to the rotating base. It also includes a tensioning mechanism for driving the rotation of the traction wire base (40), the tensioning mechanism including a first gear (42) and a second gear (43) respectively disposed on the upper ends of a pair of traction wire bases (40), and a drive gear (133) that can move up and down; the first gear (42) and the second gear (43) are offset in the height direction; the drive gear (133) has a first state of meshing with the first gear (42) and a second state of meshing with the second gear (43).

2. The traction wire tension control mechanism according to claim 1, characterized in that: The tensioning mechanism also includes a gear push rod (131) for mounting the drive gear (133). A rotating shaft (32) is provided on the rotating base (30). The gear push rod (131) is sleeved on the rotating shaft (32) and can rotate and move vertically relative to it. A first return spring (33) is provided between the gear push rod (131) and the rotating base (30) to keep the drive gear (133) in a high position in its natural state.

3. The traction wire tension control mechanism according to claim 2, characterized in that: The upper end of the gear push rod (131) is connected to a tension knob (13) for controlling its rotation.

4. The traction wire tension control mechanism according to claim 1, characterized in that: The traction wire base (40) is provided with a fixing hole (41) for connecting the traction wire.

5. The traction wire tension control mechanism according to claim 3, characterized in that: It also includes a locking mechanism for locking the traction wire base (40) in a tensioned position; the locking mechanism includes a first ratchet (44) and a second ratchet (45) respectively disposed at the lower ends of the pair of traction wire bases (40), and a first pawl (46) and a second pawl (47) respectively adapted to the first ratchet (44) and the second ratchet (45); the first pawl (46) and the second pawl (47) are rotatably connected to the rotating base (30).

6. The traction wire tension control mechanism according to claim 5, characterized in that: A meshing linkage tooth (48) is provided between the first pawl (46) and the second pawl (47); a second return spring (49) is provided between the first pawl (46) or the second pawl (47) and the rotating base (30) to keep the first pawl (46) and the second pawl (47) in the position of stopping the first ratchet (44) and the second ratchet (45).

7. The traction wire tension control mechanism according to claim 6, characterized in that: It also includes an unlocking mechanism for releasing the pawl from the ratchet engagement state; the unlocking mechanism includes an unlocking rod (145) sleeved on the gear push rod (131), a swing rod (146) extending toward the pawl is provided on one side of the unlocking rod (145), a swing protrusion (147) for acting on the pawl is provided at the lower end of the swing rod (146), and an unlocking knob (14) is connected to the upper end of the unlocking rod (145).

8. The traction wire tension control mechanism according to claim 7, characterized in that: The upper end of the unlocking knob (14) is provided with a receiving groove (141) for accommodating the tensioning knob (13).

9. A split-type endoscope, characterized in that: It includes at least an operating part (10), an intervention part (20), and a traction wire tension control mechanism as described in any one of claims 1-8, wherein the distal end of the operating part is detachably connected to the proximal end of the intervention part; the operating part includes at least an operating part body (11), the rotating base (30) is disposed inside the operating part body, and also includes a handle disposed outside the operating part body for controlling the rotation of the rotating base.

10. The split-type endoscope according to claim 9, characterized in that: The main body (11) of the operating part is provided with a limiting groove (111), and the bottom of the unlocking knob (14) is provided with a limiting block (144). The limiting block (144) extends into the limiting groove (111) to limit the rotation angle of the unlocking knob (14).

Images