A fixing device for bronchoscopy

Abstract

The application relates to the field of medical auxiliary equipment, in particular to a fixing device for bronchoscopy, which comprises a base, a fixing mechanism for fixing a bronchoscope is arranged on the base, a limiting mechanism and a plurality of supporting rods are arranged between the base and the fixing mechanism, adjacent supporting rods are movably connected, the limiting mechanism is used for providing a pre-tightening force to limit the movement between adjacent supporting rods; and an unlocking mechanism for offsetting the pre-tightening force is arranged on the fixing mechanism. The application can realize quick adjustment and unlocking, and improves the convenience of clinical operation.

Description

Technical Field

[0001] This invention relates to the field of medical auxiliary equipment, and more specifically to a fixation device for bronchoscopy. Background Technology

[0002] Bronchoscopy is an indispensable minimally invasive procedure in the diagnosis and treatment of respiratory diseases, widely used in scenarios such as lung tumors, airway stenosis, infectious lesions, and foreign body removal. During the examination, the stability of the patient's head and the bronchoscope's operating part directly affects the smoothness and safety of the procedure. To reduce fatigue and shaking caused by prolonged hand-holding of the bronchoscope by medical staff and to achieve precise control of the insertion and retraction of the insertion part, various bronchoscopy fixation devices have been proposed in recent years. For example, Chinese invention patent CN117752428B discloses a bronchoscopy fixation device, which includes a base, column, sleeve, connecting column, circular block, as well as clamping components, insertion and exit components, and cleaning components. The device drives a worm gear and spur gear by rotating a first rotating block, which in turn moves a rack and crossbar, bringing the moving clamp closer to the fixed clamp to hold the operating part of the bronchoscope. Simultaneously, a motor drives a limiting wheel to automatically advance and retract the insertion part. An adjusting limiting component is also provided. By rotating a second rotating block, the threaded rod moves the crossbar up and down, thereby engaging the first limiting rack with the first toothed ring to lock the angle of the connecting column, and engaging the second limiting rack with the second toothed ring to lock the angle of the circular block, thus fixing the overall position and angle of the device.

[0003] However, the device's adjustment and limiting components rely on a threaded rod-driven lifting mechanism. When it is necessary to adjust the rotation angle of the connecting column and the pitch angle of the circular block according to different patient positions or operator standing habits, medical staff must manually rotate the second rotating block multiple times to slowly raise and lower the horizontal plate to disengage or engage the rack and pinion. This process not only requires a large rotation stroke but also requires both hands (one hand to support the device, the other to rotate), making it impossible to perform rapid, single-handed operation while observing the patient's position, thus prolonging preoperative preparation time.

[0004] Furthermore, because the engagement between the rack and pinion is a discrete locking mechanism with a fixed gap between the teeth, fine-tuning of the angle cannot be achieved through smooth stepless adjustment. Instead, the rack must be completely disengaged, and the component must be roughly moved to another position by feel before re-engaging. If the adjustment is not satisfactory on the first attempt, the cycle of "unlocking—moving—locking—checking" must be repeated, often requiring multiple trials to reach the ideal position, further complicating the operation.

[0005] Given the shortcomings of existing technologies, there is an urgent need for a new type of fixation device for bronchoscopy that can improve the convenience of clinical operation. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a fixation device for bronchoscopy, which enables rapid adjustment and unlocking, thereby improving the convenience of clinical procedures.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a bronchoscopy fixation device includes a base, a fixation mechanism for fixing the bronchoscope is provided on the base, a limiting mechanism and several support rods are provided between the base and the fixation mechanism, adjacent support rods are movably connected, the limiting mechanism is used to provide a pre-tightening force to limit the movement between adjacent support rods; the fixation mechanism is provided with an unlocking mechanism for counteracting the pre-tightening force.

[0008] The technical principles of the above solution are as follows:

[0009] When the unlocking mechanism is not activated, the limiting mechanism continuously applies a preload to the movable connections between the support rods. The structural locking force generated by this preload is sufficient to overcome the weight of the support rods and the fixing mechanism, as well as the external forces generated during normal operation of the bronchoscope, preventing relative rotation or sliding between adjacent support rods, thereby maintaining the fixing mechanism in a stable spatial position and angle.

[0010] When the position or angle of the fixing mechanism needs to be adjusted, the operator presses the unlocking mechanism located on the fixing mechanism with one hand. The unlocking mechanism transmits the pressure to the limiting mechanism. This force is opposite in direction to the original preload of the limiting mechanism, and is equal in magnitude or slightly larger, thus instantly canceling out the preload. At this time, the movable connections between the support rods lose their locking force and regain their ability to rotate or slide freely.

[0011] In the unlocked state, the operator can support the fixation mechanism with one hand and freely adjust the angles or extension lengths of the support rods according to the patient's position or operating habits. Because all motion pairs are in a free state, the adjustment process is smooth, stepless, and requires no additional tools. The operator can continuously adjust the fixation mechanism to any desired position while observing the patient and the bronchoscope monitor.

[0012] Once the fixing mechanism reaches the ideal position, the operator releases the unlocking mechanism. After the pressure disappears, the limiting mechanism reapplies preload to the movable connection of the support rods individually, instantly establishing sufficient locking torque to lock each support rod back to its current angle and position, allowing the fixing mechanism to be stably suspended in the new position.

[0013] The above approach has the following beneficial effects:

[0014] 1. This solution employs a one-button operation logic of press to unlock, adjust, and release to lock. Medical staff only need to press the unlocking mechanism with one hand to release all the support rods from locking, while the other hand can simultaneously support the fixation mechanism or bronchoscope, eliminating the need for multi-turn rotations with both hands as required by existing technologies. Once adjusted to the correct position, releasing the button automatically locks the device. The entire adjustment process can be completed within seconds, significantly reducing the time spent on pre-operative or intraoperative device positioning adjustments.

[0015] 2. This solution utilizes the continuous locking force generated by the pre-tightening force to achieve locking. In the unlocked state, the support rod can move continuously and smoothly, allowing the operator to finely adjust the angle and position until it fully meets the requirements. This one-time operation avoids multiple trial-and-error cycles and greatly improves the accuracy and convenience of adjustment.

[0016] Furthermore, the fixing mechanism includes a carrier and a clamp. The carrier is fixedly connected to an adjacent support rod, and the clamp is detachably connected to the carrier. The clamp has a clamping groove, and clamping fingers are symmetrically rotatably connected in the clamping groove. Each clamping finger is provided with an incomplete gear, and each incomplete gear meshes with a first rack. A sliding rod is provided between the first racks, and the sliding rod is axially fixedly connected to the first rack and slidably connected to the clamp.

[0017] Beneficial effects: By pushing the slide bar, the two clamping fingers can be opened and closed symmetrically in a synchronized manner, facilitating the adaptation to bronchoscopes of different sizes. Bronchoscopy is an invasive procedure that requires a high degree of aseptic technique for the instruments. In this solution, the clamps can be quickly detached from the carrier and independently sterilized by high temperature and pressure or chemical immersion, avoiding cross-infection. Furthermore, spare clamps can be quickly replaced according to different examination needs (such as the requirement for specially shaped clamping surfaces) without replacing the entire fixation device, reducing operating costs.

[0018] Furthermore, a groove is provided inside the carrier, and an insertion rod is fixedly connected to one side of the clamp. When the insertion rod is in the groove, the insertion rod slides into the groove. A sliding groove is provided inside the insertion rod, and the sliding groove is slidably connected to the sliding rod. Several arc-shaped grooves are connected around the sliding groove.

[0019] The inner circumferential sidewall of the groove is provided with several limiting grooves, which correspond one-to-one with the arc-shaped grooves. Each limiting groove is equipped with a retaining ball and a spring. The retaining ball slides in the limiting groove, and the two ends of the spring are fixedly connected to the retaining ball and the inner wall of the limiting groove, respectively. When the insertion rod is inserted into the groove, the outer wall of the insertion rod pushes the retaining ball back into the limiting groove until the arc-shaped groove and the limiting groove coincide. At this point, the retaining ball is engaged with the arc-shaped groove under the action of the spring. An adjustment mechanism is also provided in the groove. When the insertion rod is inserted into the groove, the adjustment mechanism is connected to the slide groove and is used to adjust the air pressure in the slide groove.

[0020] Beneficial effects: By switching between positive and negative pressure through a single adjustment mechanism, two key actions can be completed simultaneously: under negative pressure, the slide bar is driven to adapt the gripper fingers to bronchoscopes of different diameters, and the bulb is firmly engaged in the arc-shaped groove to lock the clamp to the carrier; under positive pressure, the clamp is simultaneously unlocked and the gripper fingers are opened. Operators do not need to adjust the clamping force and locking mechanism separately, significantly reducing operating steps and learning costs.

[0021] Furthermore, the adjustment mechanism includes a tube fixedly connected to the groove. When the rod is in the groove, the tube communicates with the slide groove. The end of the tube away from the rod is connected to a pneumatic chamber. A slide plate is slidably connected in the pneumatic chamber. A second rack is provided at one end of the slide plate. The second rack is slidably connected to the carrier. A transmission gear meshes on the second rack. A worm gear is coaxially fixedly connected to the transmission gear. The worm gear meshes with a worm. One end of the worm extends through the carrier to the outside of the carrier. A knob is rotatably connected to the outside of the carrier. The knob is coaxially fixedly connected to the worm.

[0022] Beneficial effects: The worm gear's speed reduction effect amplifies the input torque: the operator only needs to apply a small force to rotate the knob to overcome the sealing friction between the slide and the pneumatic cavity wall, as well as the gas pressure reaction force.

[0023] The inherent self-locking characteristic of worm gear drives ensures that the slide plate can be firmly locked in any position, maintaining stable positive or negative pressure over a long period without any additional devices. Even if vibration occurs during surgery or the knob is accidentally pressed, it will not cause accidental air pressure leakage, significantly improving the reliability of clamping and locking.

[0024] Furthermore, the limiting mechanism includes adjusting arms symmetrically arranged in adjacent support rods. The adjusting arm closer to the base is the first adjusting arm, and the adjusting arm farther from the base is the second adjusting arm. The first adjusting arm is rotatably connected to the support rod, and the second adjusting arm is fixedly connected to the support rod. The first adjusting arm and the second adjusting arm are rotatably connected through a rotating shaft.

[0025] Each support rod has a first channel opened on the end near the first adjusting arm. One end of the first channel is connected to the unlocking mechanism, and the other end of the first channel is connected to a first fastening mechanism for limiting the rotation of the first adjusting arm and the second adjusting arm.

[0026] Each support rod has a second channel near the second adjusting arm, and a guide groove is formed on the inner wall of each second channel. A limit block is slidably connected in each guide groove. A frustum groove is formed in the second adjusting arm. The side of the frustum groove away from the base is the upper bottom surface. The upper bottom surface of the frustum groove is smaller than the lower bottom surface. One end of the upper bottom surface of the frustum groove is connected to the first fastening mechanism, and the other end of the frustum groove is connected to the second channel. A pin is slidably connected in the frustum groove. One end of the pin is fixedly connected to the limit block. A second fastening mechanism is provided circumferentially on the pin to limit the rotation of the second adjusting arm and the pin. A compression spring is provided between the second channel and the pin. The first channel and the second channel in the same support rod are interconnected.

[0027] Beneficial effects: This approach does not rely on the discrete engagement of the teeth, but rather uses a hydraulically driven first fastening mechanism to generate frictional locking force, applying a stable braking torque at any angle of relative rotation between the first and second adjusting arms. After the operator adjusts the support rod to any desired position and releases the unlocking mechanism, that position is precisely locked, eliminating issues of gear gaps or misalignment. This greatly facilitates clinical scenarios requiring precise adjustments to the bronchoscopy approach angle.

[0028] Because the first and second channels within the same support rod are interconnected and filled with incompressible hydraulic medium, the pressure generated by the compression spring is transmitted instantaneously and equally to the first and second fastening mechanisms through the medium. This ensures that the rotational and axial degrees of freedom at each support rod joint are locked synchronously, eliminating the need to adjust multiple locking points separately.

[0029] Furthermore, the first fastening mechanism includes a rotating groove formed in the second adjusting arm. A turntable is fixedly connected to one end of the first adjusting arm near the rotating shaft. The turntable is rotatably connected to the rotating shaft and rotates in conjunction with the rotating groove. A limiting plate is slidably connected to the rotating shaft. Both the limiting plate and the disc are provided with meshing teeth on opposite sides. When the limiting plate approaches the disc, the limiting plate meshes with the disc.

[0030] The second adjusting arm has a transmission cavity, and a hydraulic plate is slidably connected in the transmission cavity. The hydraulic plate divides the transmission cavity into a first cavity and a second cavity. The first cavity is connected to the first channel, and the second cavity is connected to the frustum groove and the second channel in sequence through a hydraulic pipe. A connecting rod is provided on one side of the hydraulic plate. The end of the connecting rod away from the hydraulic plate extends through the transmission cavity and is fixedly connected to the limiting plate. The connecting rod is slidably engaged with the second adjusting arm.

[0031] Beneficial effects: When the compression spring pushes the pin to move towards the upper bottom surface (small end) of the frustum groove, the hydraulic medium in the frustum groove is pressurized. The pressure is transmitted to the second chamber through the hydraulic pipe, increasing the pressure in the second chamber. This pressure pushes the hydraulic plate towards the first chamber. The hydraulic plate, through the connecting rod, pushes the limiting plate to slide axially towards the turntable until the limiting plate and the meshing teeth on the end face of the turntable are fully engaged. Since the meshing teeth cannot slide relative to each other in the circumferential direction, the turntable and the first adjusting arm fixedly connected to it are locked and cannot rotate relative to the second adjusting arm. At the same time, the hydraulic medium in the first chamber is squeezed back into the first channel, but because the first channel is closed with the unlocking mechanism, the hydraulic plate remains in this position, and the locked state is stably maintained.

[0032] When the operator presses the unlocking mechanism, it applies a reverse hydraulic pressure (positive pressure) to the first channel. This pressure enters the first chamber and pushes the hydraulic plate towards the second chamber. As the hydraulic plate moves, it pulls the limit plate away from the turntable via a connecting rod, disengaging the meshing teeth. Simultaneously, the hydraulic plate compresses the medium in the second chamber, transmitting the pressure in the reverse direction to the frustum groove, pushing the pin towards the lower bottom (large end) of the frustum groove, releasing the clamping force within the groove. At this point, the first and second adjusting arms can rotate freely again, achieving unlocking.

[0033] After the unlocking mechanism is released, the reverse pressure in the first channel disappears, the spring pushes the pin to press the medium in the frustum groove again, the pressure in the second chamber increases, and pushes the hydraulic plate and the limit plate to engage again, completing the automatic locking.

[0034] The bronchoscope employs a locking mechanism using meshing teeth on the end faces of a limiting disc and a turntable. Compared to methods relying on friction for clamping, this toothed meshing can withstand greater torsional torque and prevents relative slippage. Even when the bronchoscope's operating section is subjected to significant external force disturbance, the angle between the first and second adjusting arms remains precisely unchanged, providing rigid support for precise operation.

[0035] Furthermore, the second fastening mechanism includes a push block circumferentially fixed to the outside of the pin, and a limit ball is placed on the side of the push block near the bottom surface of the frustum groove, with the limit ball slidingly engaging with the inner wall of the frustum groove.

[0036] Beneficial effects: During locking and unlocking, the limit ball contacts the inner wall of the frustum groove and the push block in a rolling manner, generating almost no sliding friction. Compared with solutions that rely on direct friction of the conical surface for clamping, this mechanism greatly reduces wear, maintains precise wedging performance even after long-term repeated use, and does not generate metal debris due to wear that contaminates the hydraulic medium.

[0037] Furthermore, a protective sleeve is installed between adjacent support rods.

[0038] Beneficial effects: When the support rod rotates relative to the joint in the unlocked state, the sheath deforms accordingly, without restricting the joint's degree of freedom of movement. When the support rod is locked at a certain angle, the sheath remains in a closed state, preventing foreign objects from entering the joint.

[0039] Furthermore, the unlocking mechanism includes a hydraulic channel within the carrier, one end of which is connected to the first channel, and the other end of which is slidably connected to a piston, on which a button is mounted.

[0040] Beneficial effects: The operator can release the locks of all support rod joints in milliseconds by simply pressing a button with a single finger, without any rotation or levering. The locks are immediately restored after the button is released.

[0041] Furthermore, the carrier is equipped with graduations for bronchoscopes of different diameters.

[0042] Beneficial effects: Before holding the bronchoscope, the operator can directly preset the gripping finger to the appropriate opening using the scale according to the nominal diameter of the bronchoscope. Unlike traditional non-gradient devices, which require clamping, finding it too tight or too loose, readjusting, and trying again, this significantly reduces the number of adjustments and time, making it especially suitable for examinations or surgeries that require frequent changes to different bronchoscope models. Attached Figure Description

[0043] Figure 1 This is a three-dimensional structural schematic diagram of the fixation device for bronchoscopy of the present invention;

[0044] Figure 2 for Figure 1 Schematic diagram of the internal structure of the carrier in the fixation device for bronchoscopy.

[0045] Figure 3 for Figure 2 A schematic diagram of the structure of the middle finger;

[0046] Figure 4 for Figure 1 A schematic diagram of the internal structure of the location of the middle sheath;

[0047] Figure 5 for Figure 4 Schematic diagram of the transfer shaft structure.

[0048] The reference numerals in the accompanying drawings include: 1. Base; 2. Support rod; 3. Sheath; 4. Carrier; 5. Clamp; 6. Knob; 7. Insert rod; 8. Button; 201. First adjusting arm; 202. Rotating groove; 203. Rotating shaft; 204. Frustum groove; 205. Pin; 206. Limiting ball; 207. Push block; 208. Guide groove; 209. Limiting block; 210. First channel; 211. Compression spring; 212. Turntable; 213. Limiting plate; 214. Transmission... 215. Moving cavity; 216. Hydraulic plate; 217. Connecting rod; 218. Second channel; 219. Second adjusting arm; 401. Insertion tube; 402. Pneumatic cavity; 403. Slide plate; 404. Second rack; 405. Worm gear; 406. Worm wheel; 407. Transmission gear; 408. Limiting groove; 409. Spring; 410. Ball clamp; 501. Grip finger; 502. Slide rod; 503. Incomplete gear; 504. First rack; 701. Slide groove; 801. Hydraulic channel. Detailed Implementation

[0049] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this invention, 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, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] The following detailed description illustrates the specific implementation method:

[0053] Example:

[0054] As attached Figure 1 - Appendix Figure 5 As shown: A bronchoscopy fixation device includes a base 1. In this embodiment, the base 1 can be bolted to the bed. In some other preferred embodiments, the base 1 can also be a floor-mounted structure fixed to the ground, serving as the supporting foundation for the entire device. A fixing mechanism for fixing the bronchoscope is provided on the base 1. A limiting mechanism and several support rods 2 are provided between the base 1 and the fixing mechanism. Adjacent support rods 2 are movably connected. Preferably, a sheath 3 is bonded and fixed between adjacent support rods 2. Specifically, in conjunction with the attached... Figure 1 and attached Figure 2 As shown, the fixing mechanism includes a carrier 4 and a clamp 5. The carrier 4 is welded and fixed to the adjacent support rod 2. The clamp 5 is detachably connected to the carrier 4. The clamp 5 has a clamping groove, and clamping fingers 501 are symmetrically rotatably connected in the clamping groove. Figure 3 As shown, each of the gripper fingers 501 has an incomplete gear 503 welded and fixed to its root. Each of the incomplete gears 503 meshes with a first rack 504. A slide rod 502 is provided between the first racks 504. The slide rod 502 is axially welded and fixed to the first racks 504, and the slide rod 502 is slidably connected to the clamp 5. Preferably, an elastic pad is bonded and fixed to the inner side of each gripper finger 501 to reduce the rigid contact between the gripper finger 501 and the bronchoscope.

[0055] Preferably, the carrier 4 has a groove inside, combined with the attached Figure 2 As shown, a rod 7 is welded and fixedly connected to the right side of the clamp 5. When the rod 7 is in the groove, the rod 7 slides with the groove. A sliding groove 701 is provided in the rod 7. The sliding groove 701 is slidably connected to the sliding rod 502. Several arc-shaped grooves are connected in the circumferential direction of the sliding groove 701.

[0056] Several limiting grooves 408 are circumferentially formed on the inner wall of the groove, each corresponding to an arc-shaped groove. Each limiting groove 408 contains a retaining ball 410 and a spring 409. The retaining ball 410 slides within the limiting groove 408, and the two ends of the spring 409 are respectively bonded and fixed to the retaining ball 410 and the inner wall of the limiting groove 408. When the insert rod 7 is inserted into the groove, the outer wall of the insert rod 7 pushes the retaining ball 410 back into the limiting groove 408 until the arc-shaped groove and the limiting groove 408 coincide. At this point, the retaining ball 410 engages with the arc-shaped groove under the action of the spring 409, thus completing the initial fixation of the clamp 5. An adjustment mechanism is also provided within the groove. When the insert rod 7 is inserted into the groove, the adjustment mechanism communicates with the slide groove 701, and is used to adjust the air pressure within the slide groove 701.

[0057] Specifically, the adjustment mechanism includes an insertion tube 401 embedded in the inner wall of the groove. When the insertion rod 7 is in the groove, the insertion tube 401 slides in conjunction with the sliding groove 701, and the insertion tube 401 communicates with the sliding groove 701. The end of the insertion tube 401 away from the insertion rod 7 is connected to a pneumatic cavity 402. A sliding plate 403 is slidably connected in the pneumatic cavity 402. A second rack 404 is welded and fixed to one end of the sliding plate 403. The second rack 404 is slidably connected to the carrier 4. A transmission gear 407 meshes on the second rack 404, and the transmission gear 407 is coaxial. A worm gear 406 is fixedly connected to a key, and the worm gear 406 meshes with a worm 405. A slot is provided inside the carrier 4 to accommodate the movement of the worm gear 406, worm 405, and transmission gear 407. One end of the worm 405 extends through the carrier 4 to the outside. A knob 6 is rotatably connected to the outside of the carrier 4, and the knob 6 is coaxially and keyedly connected to the worm 405. Preferably, a set of scale lines and corresponding numerical markings are laser-engraved, printed, or molded on the outer surface of the carrier 4 (e.g., near the knob 6 or the slide bar 502). These scales indicate the range (in millimeters or inches) of the outer diameter of the bronchoscope operating section that can be accommodated between the current fingers 501. There is a one-to-one correspondence between the scale calibration and the output displacement of the adjustment mechanism (e.g., the axial position of the slide bar 502 or the rotation angle of the knob 6). In some other preferred embodiments, the adjustment mechanism can be set up by adding an air pump to the intubation tube 401, generating positive or negative pressure within the intubation tube 401.

[0058] The limiting mechanism is used to provide preload to limit the movement between adjacent support rods 2; the fixing mechanism is provided with an unlocking mechanism to counteract the preload.

[0059] Specifically, in conjunction with the appendix Figure 4 As shown, the limiting mechanism includes adjusting arms symmetrically arranged within adjacent support rods 2, near the base 1 (i.e., attached). Figure 4 The adjusting arm (lower right) is the first adjusting arm 201, which is away from the base 1 (attached). Figure 4 The adjusting arm on the left is the second adjusting arm 218. The first adjusting arm 201 is rotatably connected to the support rod 2, and the second adjusting arm 218 is welded and fixed to the support rod 2. The first adjusting arm 201 and the second adjusting arm 218 are rotatably connected through the rotating shaft 203.

[0060] Each support rod 2 has a first channel 210 on one end near the first adjusting arm 201. One end of the first channel 210 is connected to the unlocking mechanism, and the other end of the first channel 210 is connected to a first fastening mechanism for restricting the rotation of the first adjusting arm 201 and the second adjusting arm 218.

[0061] Each support rod 2 has a second channel 217 at one end near the second adjusting arm 218. Each second channel 217 has a guide groove 208 on its inner wall. Each guide groove 208 has a limit block 209 slidably connected to it. The second adjusting arm 218 has a frustum groove 204. The side of the frustum groove 204 away from the base 1 is the upper bottom surface (i.e., the cross-section is smaller). The upper bottom surface of the frustum groove 204 is smaller than the lower bottom surface. One end of the upper bottom surface of the frustum groove 204 is connected to the first fastening mechanism, and the other end of the frustum groove 204 is connected to the second channel 217. A pin 205 is slidably connected in the frustum groove 204. One end of the pin 205 is welded and fixed to the limiting block 209. A second fastening mechanism is provided circumferentially on the pin 205 to limit the rotation of the second adjusting arm 218 and the pin 205. A compression spring 211 is provided between the second channel 217 and the pin 205. The two ends of the compression spring 211 are respectively bonded and fixed to the inner wall of the pin 205 and the second channel 217. The first channel 210 and the second channel 217 in the same support rod 2 are interconnected.

[0062] Specifically, in conjunction with the appendix Figure 4 and attached Figure 5 As shown, the first fastening mechanism includes a rotating groove 202 formed in the second adjusting arm 218. A turntable 212 is welded and fixed to one end of the first adjusting arm 201 near the rotating shaft 203. The turntable 212 is coaxially rotatably connected to the rotating shaft 203, and the turntable 212 is rotatably engaged with the rotating groove 202. A limiting plate 213 is slidably connected to the rotating shaft 203 via a spline or flat key. The limiting plate 213 and the disc are both welded and fixed with meshing teeth (such as end face teeth or saw teeth, not shown in the figure) on opposite sides. When the limiting plate 213 approaches the disc, the meshing teeth of the two engage with each other, restricting the rotation of the turntable 212 relative to the rotating shaft 203, thereby locking the angle between the first adjusting arm 201 and the second adjusting arm 218.

[0063] The second adjusting arm 218 has a transmission cavity 214, and a hydraulic plate 215 is slidably connected inside the transmission cavity 214. The hydraulic plate 215 divides the transmission cavity 214 into a first cavity and a second cavity (see attached). Figure 5 In the middle, the first cavity is located below the second cavity. The first cavity is connected to the first channel 210. The second cavity is connected to the frustum groove 204 and the second channel 217 in sequence through hydraulic pipes. A connecting rod 216 is provided on one side of the hydraulic plate 215. The end of the connecting rod 216 away from the hydraulic plate 215 extends through the transmission cavity 214 and is welded and fixed to the limiting plate 213. The connecting rod 216 is slidably engaged with the second adjusting arm 218.

[0064] Specifically, in conjunction with the appendix Figure 4As shown, the second fastening mechanism includes a push block 207 circumferentially welded and fixed to the outside of the pin 205. In this embodiment, the push block 207 has an annular structure, and several limiting balls 206 are placed on the side of the push block 207 near the bottom surface of the frustum groove 204. The limiting balls 206 slide in contact with the inner wall of the frustum groove 204. In some other preferred embodiments, the push block 207 has an arc-shaped block structure, and the frustum groove 204 has a flower-shaped groove for guiding each push block 207. In this case, the limiting balls 206 correspond one-to-one with the push blocks 207. This arrangement can prevent the limiting balls 206 from accumulating locally in the frustum groove.

[0065] Specifically, in conjunction with the appendix Figure 2 As shown, the unlocking mechanism includes a hydraulic channel 801 opened in the carrier 4. One end of the hydraulic channel 801 is connected to the first channel 210, and the other end of the hydraulic channel 801 is slidably connected to a piston. A button 8 is welded and fixed on the piston. The button 8 is located on the outside of the carrier 4. The operator can transmit and amplify the pressing force by pressing the button 8 through the hydraulic medium (such as hydraulic oil) (Pascal's Law).

[0066] The specific implementation process is as follows:

[0067] The base 1 is fixed to the appropriate position on the hospital bed with bolts. The insertion rod 7 of the clamp 5 is aligned with the groove on the carrier 4 and pushed in. The outer wall of the insertion rod 7 first presses against the retaining ball 410 in the limiting groove 408, causing the retaining ball 410 to compress the spring 409 and retract into the limiting groove 408. When the insertion rod 7 is pushed in until the arc-shaped groove is aligned with the limiting groove 408, the retaining ball 410 is ejected into the arc-shaped groove under the action of the spring 409, making a "click" sound, indicating that the clamp 5 has been initially fixed. At this time, the insertion tube 401 is also sealed and connected to the slide groove 701.

[0068] The operator observes the scale on the carrier 4 according to the outer diameter of the bronchoscope operating section to be used, and rotates the knob 6 to generate negative pressure. This negative pressure is transmitted through the cannula 401 to the slide groove 701. On one hand, it attracts the slide rod 502 to move towards the cannula 401. The slide rod 502 drives the first rack 504, the incomplete gear 503, and the two gripping fingers 501 to close symmetrically until the distance between the gripping fingers 501 matches the diameter indicated by the scale. On the other hand, the negative pressure also acts on each arc-shaped groove, further pressing the retaining ball 410 into the arc-shaped groove under the pressure difference, enhancing the locking reliability of the clamp 5. At this point, the bronchoscope operating section is placed between the two gripping fingers 501.

[0069] After clamping the bronchoscope, the operator needs to adjust the spatial position and angle of the entire fixation mechanism (clamp 5 and carrier 4) so ​​that the insertion part of the bronchoscope can smoothly enter the patient's airway.

[0070] At this time, the operator presses button 8 on carrier 4 with the thumb of one hand, and the piston moves in the direction of squeezing the hydraulic medium, applying pressure to the hydraulic medium in hydraulic channel 801. This pressure is quickly transmitted through the first channel 210 to the first chamber of transmission cavity 214 and frustum groove 204 in each support rod 2. In transmission cavity 214, hydraulic pressure pushes hydraulic plate 215 to move in the direction of second chamber. Hydraulic plate 215 pulls limit plate 213 away from turntable 212 through connecting rod 216, so that limit plate 213 disengages from the meshing teeth on turntable 212, thereby releasing the lock of the first fastening mechanism (limit plate 213).

[0071] Simultaneously, the hydraulic pressure within the frustum groove 204 pushes the pin 205 towards the lower bottom surface (large end) of the frustum groove 204, compressing the compression spring 211 and causing the wedging force between the push block 207 on the pin 205 and the limiting ball 206 to disappear. The limiting ball 206 rolls to the gap position, and the second fastening mechanism (limiting ball 206) is also unlocked. Because the hydraulic medium is incompressible and the pressure is transmitted instantaneously at equal values, the first and second fastening mechanisms at all support rod 2 joints are simultaneously unlocked.

[0072] In the unlocked state, the joints between the support rods 2 are completely free. The operator, while holding down button 8 and using the same hand to support the fixing mechanism, can steplessly and smoothly change the angle and extension length between the support rods 2, thereby adjusting the bronchoscope to any desired position. Because the sheath 3 covers the joint gaps, the internal structure will not be contaminated by external factors, nor will it injure the operator.

[0073] Once the bronchoscope is in the desired position, the operator releases button 8. At this point, spring 211 pushes pin 205 back towards the bottom surface (small end) of the frustum groove 204, increasing the hydraulic pressure within the groove. This pressure is transmitted through the hydraulic pipe to the second chamber of transmission chamber 214, pushing hydraulic plate 215 and connecting rod 216 towards the first chamber, causing the limiting plate 213 to engage with turntable 212 again, locking the first fastening mechanism. Simultaneously, push block 207 on pin 205 weds the limiting ball 206 onto the conical surface of the frustum groove 204, and the second fastening mechanism also returns to locking. All joints are securely locked again, and the fixing mechanism is stably suspended in its current position. The entire adjustment process can be completed with just one hand, without rotating any knobs 6 or using any tools.

[0074] During the examination, if it is necessary to change the position or angle of the bronchoscope again, simply repeat the operation of pressing button 8, adjusting, and releasing button 8. When it is necessary to change to a bronchoscope of a different diameter, rotate knob 6 to switch the air pressure to positive pressure. Positive pressure pushes slide bar 502 to move in the opposite direction, causing the gripper 501 to open and release the previous bronchoscope. Then, rotate knob 6 to the corresponding mark according to the diameter of the new endoscope and insert the new endoscope.

[0075] When the inspection is complete and the clamp 5 needs to be disassembled for disinfection, the operator rotates the knob 6 to generate positive pressure in the adjustment mechanism. This positive pressure is transmitted through the insertion tube 401 and the slide groove 701 to the arc-shaped groove, pushing the retaining ball 410 back into the limiting groove 408, while simultaneously pushing the slide rod 502 to open the clamping fingers 501. At this point, the insertion rod 7 can be easily pulled out of the groove, separating the clamp 5 from the carrier 4. After removal, the spring 409 pushes the retaining ball 410 back to its initial state for the next insertion. The clamp 5 can be cleaned, disinfected, or sterilized independently.

[0076] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A bronchoscopic fixation device, comprising a base (1), wherein a fixation mechanism for fixing a bronchoscope is provided on the base (1), characterized in that, A limiting mechanism and several support rods (2) are provided between the base (1) and the fixing mechanism. Adjacent support rods (2) are movably connected. The limiting mechanism is used to provide pre-tightening force to limit the movement between adjacent support rods (2). The fixing mechanism is provided with an unlocking mechanism to counteract the pre-tightening force.

2. The bronchoscopic fixation device according to claim 1, characterized in that, The fixing mechanism includes a carrier (4) and a clamp (5). The carrier (4) is fixedly connected to the adjacent support rod (2). The clamp (5) is detachably connected to the carrier (4). The clamp (5) has a clamping groove. The clamping groove is symmetrically connected to the clamping fingers (501). Each clamping finger (501) is provided with an incomplete gear (503). Each incomplete gear (503) meshes with a first rack (504). A slide rod (502) is provided between the first racks (504). The slide rod (502) is axially fixedly connected to the first rack (504). The slide rod (502) is slidably connected to the clamp (5).

3. The bronchoscopic fixation device according to claim 2, characterized in that, The carrier (4) has a groove, and the clamp (5) is fixedly connected to one side of the rod (7). When the rod (7) is in the groove, the rod (7) slides with the groove. The rod (7) has a sliding groove (701), which slides with the rod (502). The sliding groove (701) is connected to several arc-shaped grooves in the circumferential direction. The inner circumferential sidewall of the groove is provided with several limiting grooves (408), and each limiting groove (408) corresponds to an arc groove. Each limiting groove (408) is provided with a retaining ball (410) and a spring (409). The retaining ball (410) slides with the limiting groove (408), and the two ends of the spring (409) are fixedly connected to the retaining ball (410) and the inner wall of the limiting groove (408), respectively. When the insert rod (7) is inserted into the groove, the outer wall of the insert rod (7) pushes the retaining ball (410) back into the limiting groove (408) until the arc groove and the limiting groove (408) coincide. The retaining ball (410) is engaged with the arc groove under the action of the spring (409). An adjustment mechanism is also provided in the groove. When the insert rod (7) is inserted into the groove, the adjustment mechanism is connected to the slide groove (701). The adjustment mechanism is used to adjust the air pressure in the slide groove (701).

4. The bronchoscopic fixation device according to claim 3, characterized in that, The adjustment mechanism includes a tube (401) fixedly connected in the groove. When the rod (7) is in the groove, the tube (401) is connected to the slide groove (701). The end of the tube (401) away from the rod (7) is connected to a pneumatic cavity (402). A slide plate (403) is slidably connected in the pneumatic cavity (402). A second rack (404) is provided at one end of the slide plate (403). The second rack (404) is slidably connected to the carrier (4). A transmission gear (407) meshes on the second rack (404). A worm gear (406) is coaxially fixedly connected to the transmission gear (407). A worm (405) meshes on the worm gear (406). One end of the worm (405) passes through the carrier (4) and extends to the outside of the carrier (4). A knob (6) is rotatably connected to the outside of the carrier (4). The knob (6) is coaxially fixedly connected to the worm (405).

5. The bronchoscopic fixation device according to claim 4, characterized in that, The limiting mechanism includes adjusting arms symmetrically arranged in adjacent support rods (2). The adjusting arm closer to the base (1) is the first adjusting arm (201), and the adjusting arm farther from the base (1) is the second adjusting arm (218). The first adjusting arm (201) is rotatably connected to the support rod (2), and the second adjusting arm (218) is fixedly connected to the support rod (2). The first adjusting arm (201) and the second adjusting arm (218) are rotatably connected through a rotating shaft (203). The support rod (2) has a first channel (210) on one end near the first adjusting arm (201). One end of the first channel (210) is connected to the unlocking mechanism, and the other end of the first channel (210) is connected to a first fastening mechanism for restricting the rotation of the first adjusting arm (201) and the second adjusting arm (218). A second channel (217) is provided on the support rod (2) near the end of the second adjusting arm (218). A guide groove (208) is provided on the inner wall of the second channel (217). A limit block (209) is slidably connected in the guide groove (208). A frustum groove (204) is provided in the second adjusting arm (218). The side of the frustum groove (204) away from the base (1) is the upper bottom surface. The upper bottom surface of the frustum groove (204) is smaller than the lower bottom surface. One end of the upper bottom surface of the frustum groove (204) is connected to the first fastening mechanism. 204) The other end is connected to the second channel (217). A pin (205) is slidably connected in the frustum groove (204). One end of the pin (205) is fixedly connected to the limit block (209). A second fastening mechanism is provided around the pin (205) to limit the rotation of the second adjusting arm (218) and the pin (205). A compression spring (211) is provided between the second channel (217) and the pin (205). The first channel (210) and the second channel (217) in the same support rod (2) are connected to each other.

6. The bronchoscopic fixation device according to claim 5, characterized in that, The first fastening mechanism includes a rotating groove (202) opened in the second adjusting arm (218). A turntable (212) is fixedly connected to one end of the first adjusting arm (201) near the rotating shaft (203). The turntable (212) is coaxially rotatably connected to the rotating shaft (203), and the turntable (212) and the rotating groove (202) are rotatably engaged. A limiting plate (213) is slidably connected on the rotating shaft (203). The limiting plate (213) and the disc are both provided with meshing teeth on opposite sides. When the limiting plate (213) approaches the disc, the limiting plate (213) meshes with the disc. The second adjusting arm (218) has a transmission cavity (214) inside. A hydraulic plate (215) is slidably connected inside the transmission cavity (214). The hydraulic plate (215) divides the transmission cavity (214) into a first cavity and a second cavity. The first cavity is connected to the first channel (210). The second cavity is connected to the frustum groove (204) and the second channel (217) in sequence through a hydraulic pipe. A connecting rod (216) is provided on one side of the hydraulic plate (215). The end of the connecting rod (216) away from the hydraulic plate (215) passes through the transmission cavity (214) and extends to be fixedly connected to the limiting plate (213). The connecting rod (216) is slidably engaged with the second adjusting arm (218).

7. The bronchoscopic fixation device according to claim 6, characterized in that, The second fastening mechanism includes a push block (207) circumferentially fixed to the outside of the pin (205). A limit ball (206) is placed on the side of the push block (207) near the bottom surface of the frustum groove (204). The limit ball (206) slides with the inner wall of the frustum groove (204).

8. The bronchoscopic fixation device according to claim 7, characterized in that, A sheath (3) is provided between adjacent support rods (2).

9. The bronchoscopic fixation device according to claim 8, characterized in that, The unlocking mechanism includes a hydraulic channel (801) located in the carrier (4). One end of the hydraulic channel (801) is connected to the first channel (210), and the other end of the hydraulic channel (801) is slidably connected to a piston with a button (8) on it.

10. The bronchoscopic fixation device according to claim 9, characterized in that, The carrier (4) is equipped with a scale for adapting to bronchoscopes of different diameters.

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