CN218979026U - Channel fixing device capable of being opened - Google Patents

Abstract

The utility model discloses a channel fixing device capable of being opened, which belongs to the technical field of medical appliances, and comprises a connecting rod, wherein a pair of opening brackets are connected to the connecting rod in a sliding manner, the tail ends of the opening brackets are respectively provided with a pipeline drag hook extending downwards, each opening bracket comprises a connecting arm and a rotating arm, one end of each connecting arm is connected to the connecting rod in a sliding manner, and the other end of each connecting arm is provided with a connecting hole extending along the length direction of the connecting arm; one end of the rotating arm is provided with a rotating shaft which extends along the length direction and is rotatably inserted in the connecting hole, the other end of the rotating arm is provided with a pipeline drag hook, and a channel for an operation instrument to pass through is formed between the pipeline drag hooks; the connecting arm is provided with an adjusting and locking device which is used for driving the rotating shaft to rotate in the connecting hole and locking the rotating shaft in the connecting hole after the rotating shaft rotates. The expandable channel fixing device can provide a wide operation view on the basis of reducing the operation incision as much as possible, and is stable in expansion.

Description

Channel fixing device capable of being opened

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a channel fixing device capable of being opened.

Background

The spine is critical in human physiology for mobility, support and balance. In the treatment of human spinal disorders, vertebral body injuries are often caused by spinal tumors, tuberculosis and severe fractures. At this time, the spine needs to be operated, and in order to make the operation accurate, the operation incision often needs to be spread, so that the operation field is fully exposed.

Minimally invasive spinal surgery means avoiding large incisions under certain medical risks, adopting small incisions, using special minimally invasive channel instruments/devices, reaching lesions from normal anatomy under the monitoring of an imager or the guidance of navigation technology, using various miniature manual or electric instruments, and completing the whole operation process under visual conditions so as to achieve the purposes of smaller incisions, less tissue trauma, less bleeding, high operation accuracy, definite effect and quick postoperative function recovery compared with the traditional or standard spinal surgery.

Thus, stability of minimally invasive access instruments is particularly important for the overall surgical procedure. The existing minimally invasive channel instrument has the defects of unstable or difficult expansion, low operability, incapability of providing a wide operation view, inconvenient operation in operation of doctors, influence on operation safety and the like.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the expandable channel fixing device which can provide a wide operation view and realize stable expansion on the basis of reducing the operation incision as much as possible.

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model provides a can strut passageway fixing device, includes the connecting rod of horizontal setting, sliding connection has a pair of support that struts on the connecting rod, the end of strut all is equipped with downwardly extending's pipeline drag hook, strut the support and all include linking arm and swinging boom, wherein:

one end of the connecting arm is connected to the connecting rod in a sliding way, and the other end of the connecting arm is provided with a connecting hole extending along the length direction of the connecting arm;

one end of the rotating arm is provided with a rotating shaft which extends along the length direction and is rotatably inserted into the connecting hole, the other end of the rotating arm is provided with the pipeline drag hook, and a channel for an operation instrument to pass through is formed between the pipeline drag hooks;

the connecting arm is provided with an adjusting locking device which is used for driving the rotating shaft to rotate in the connecting hole and locking the rotating shaft in the connecting hole after the rotating shaft rotates.

Further, the one end that the linking arm is close to the connecting rod is equipped with the confession the sliding tray that the connecting rod passed, one side of connecting rod is equipped with the flank of tooth, wherein:

the connecting arm is provided with a driving device for driving the connecting arm to slide on the connecting rod, the connecting arm is provided with a gear hole communicated with the sliding groove, the driving device is a gear rotationally assembled in the gear hole and meshed with the tooth surface, and the upper end of the gear is provided with an instrument driving part extending out of the gear hole;

and/or, one end of the connecting arm, which is close to the connecting rod, is provided with a first locking device for locking the connecting arm, the first locking device is a clamping button, the middle part of the clamping button is hinged on the connecting arm, one end of the clamping button is provided with a positioning tooth meshed with the tooth surface, the other end of the clamping button is used as a pressing part, and a spring is arranged between the pressing part and the connecting arm.

Further, a hook piece is arranged on the side face of the rotating shaft, a through hole is formed in the connecting arm at a position corresponding to the hook piece, and the adjusting and locking device is an adjusting and locking piece which is located in the through hole and can drive the hook piece to move up and down.

Further, the through hole is a threaded hole, the adjusting locking piece is an adjusting locking bolt which is in threaded connection with the threaded hole, a U-shaped opening is formed in the hook piece, a dumbbell-shaped plug used for being clamped in the U-shaped opening is arranged at the lower end of the adjusting locking bolt, and an instrument driving part extending out of the threaded hole is arranged at the upper end of the adjusting locking bolt.

Further, a transversely extending U-shaped slot is formed in the connecting arm, the connecting hole is formed in the bottom of the U-shaped slot, the adjusting locking piece is arranged on the upper side wall of the U-shaped slot, and the hook piece avoiding slot is formed in the lower side wall of the U-shaped slot.

Further, the pipeline drag hook comprises a drag hook main body and a connecting plate positioned on the side face of the upper end of the drag hook main body, a plug-in column is arranged on the connecting plate, and one end, close to the pipeline drag hook, of the rotating arm is provided with a plug-in hole for containing the plug-in column vertically and a second locking device for locking the plug-in column in the plug-in hole.

Further, a ball socket is arranged on one side of the plug-in column, a steel ball hole is arranged on the inner side wall of the plug-in hole corresponding to the ball socket, and the second locking device comprises steel balls which are positioned in the steel ball hole and matched with the ball socket, and a button for driving the steel balls;

the rotary arm is provided with a button mounting hole communicated with the steel ball hole, the button comprises a button main body part which is slidably connected in the button mounting hole and a button pressing part which is positioned outside the button mounting hole, and the tail end of the button main body part is provided with an annular groove for accommodating the steel ball.

Further, a limiting groove extending along the length direction of the button main body is formed in the middle of the button main body, a pin hole is formed in the rotating arm at a position corresponding to the limiting groove, and a limiting pin is arranged in the limiting groove and the pin hole in a penetrating mode;

and/or a spring is arranged between the tail end of the button main body part and the bottom wall of the button mounting hole.

Further, the drag hook main body is in a semicircular shape capable of being mutually buckled;

and/or the drag hook main body is provided with a positioning pinhole.

Further, a light source hole is formed in the connecting end of the connecting plate and the drag hook main body;

and/or the middle part of the connecting plate is hinged with a pressing plate, and a torsion spring is arranged on a hinge shaft of the pressing plate;

and/or the inner side of the connecting plate of one pipeline drag hook is provided with a positioning groove, and the inner side of the connecting plate of the other pipeline drag hook is provided with a positioning convex rib matched with the positioning groove;

and/or both ends of the connecting rod are provided with U-shaped grooves for being connected with an external fixing arm.

The utility model has the following beneficial effects:

according to the utility model, the tail ends of the supporting frames are respectively provided with the downward extending pipeline drag hooks, the supporting frames comprise the connecting arms and the rotating arms, the connecting arms are provided with the adjusting and locking devices which are used for driving the rotating shafts of the rotating arms to rotate in the connecting holes and locking the rotating shafts in the connecting holes after rotating, compared with the prior art, the parallel supporting can be realized by driving the pair of supporting frames to slide back on the connecting rods by an operator, the rotating shafts of the rotating arms are driven to rotate in the connecting holes by the adjusting and locking devices, so that the angle of the pipeline drag hooks swings, the bottom sector supporting is realized, the operator can adjust the parallel supporting distance and the sector supporting swinging angle according to the operation requirement, the operation view is adjusted, the wide operation view can be provided on the basis of reducing the operation incision as far as possible, the supporting is stable, the operation is convenient, and the operation channel can be quickly established.

Drawings

FIG. 1 is a schematic view of a structure of an expandable tunnel fixation device of the present utility model when being expanded in parallel;

FIG. 2 is a schematic view of the bottom fan-shaped expansion of the expandable tunnel fixation device of the present utility model;

FIG. 3 is a schematic view of the assembled structure of the connecting arm and the rotating arm in the expandable tunnel fixture according to the present utility model, wherein (a) is a side view, (b) is a top view and shows a sectional structure at the push button, and (c) is a sectional view along the direction A-A;

FIG. 4 is a schematic view of the structure of the expandable tunnel fixation device of the present utility model where the locking bolt is adjusted;

FIG. 5 is a schematic view of the structure of the connecting rod in the expandable tunnel fixation device of the present utility model;

FIG. 6 is a schematic view of the structure of the connecting arm of the expandable tunnel fixation device of the present utility model;

FIG. 7 is a schematic view of the structure of a swivel arm of the expandable tunnel fixture of the present utility model;

FIG. 8 is a schematic view of the structure of an adjusting locking bolt in the expandable tunnel fixation device of the present utility model;

FIG. 9 is a schematic view of the structure of the push button in the expandable tunnel fixation device of the present utility model;

FIG. 10 is a schematic structural view of a left side pipeline retractor in the expandable tunnel fixation device of the present utility model, wherein (a) is a first structural view and (b) is a second structural view;

FIG. 11 is a schematic structural view of a right-side pipeline retractor in the expandable tunnel-fixing device according to the present utility model, wherein (a) is a first structural view and (b) is a second structural view;

fig. 12 is a schematic structural diagram of a box spanner used with the expandable channel securing apparatus of the present utility model.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The utility model provides a fixing device capable of expanding a channel, which comprises a connecting rod 1 transversely arranged, wherein a pair of expanding brackets are connected to the connecting rod 1 in a sliding manner, the tail ends of the expanding brackets are respectively provided with a pipeline drag hook 2 extending downwards, and the expanding brackets comprise a connecting arm 3 and a rotating arm 4, wherein:

one end of the connecting arm 3 is connected to the connecting rod 1 in a sliding manner, and the other end of the connecting arm 3 is provided with a connecting hole 31 extending along the length direction;

one end of the rotating arm 4 is provided with a rotating shaft 41 which extends along the length direction and is rotatably inserted in the connecting hole 31, the other end of the rotating arm 4 is provided with a pipeline retractor 2, and a (operation) channel for an operation instrument to pass through is formed between the pipeline retractors 2;

the connecting arm 3 is provided with an adjustment locking device for driving the rotation shaft 41 to rotate in the connecting hole 31 and locking the rotation shaft 41 in the connecting hole 31 after the rotation.

When in use, a pair of expansion brackets are driven to slide back on the connecting rod 1, so that parallel expansion can be realized (see figure 1), and the parallel expansion range can be 22-90mm; when needed, the rotation shaft 41 of the rotation arm 4 can be driven to rotate in the connecting hole 31 by utilizing the adjusting and locking device, so that the angle of the pipeline drag hook 2 is deflected, the bottom sector-shaped opening (see fig. 2 and 4) is realized, the maximum opening angle of the single-side pipeline drag hook 2 can be 20-30 degrees (particularly 26.5 degrees), and an operator can adjust the parallel opening distance and the sector-shaped opening deflection angle according to the operation requirement, so as to adjust the operation visual field.

According to the utility model, the tail ends of the supporting frames are respectively provided with the downward extending pipeline drag hooks, the supporting frames comprise the connecting arms and the rotating arms, the connecting arms are provided with the adjusting and locking devices which are used for driving the rotating shafts of the rotating arms to rotate in the connecting holes and locking the rotating shafts in the connecting holes after rotating, compared with the prior art, the parallel supporting can be realized by driving the pair of supporting frames to slide back on the connecting rods by an operator, the rotating shafts of the rotating arms are driven to rotate in the connecting holes by the adjusting and locking devices, so that the angle of the pipeline drag hooks swings, the bottom sector supporting is realized, the operator can adjust the parallel supporting distance and the sector supporting swinging angle according to the operation requirement, the operation view is adjusted, the wide operation view can be provided on the basis of reducing the operation incision as far as possible, the supporting is stable, the operation is convenient, and the operation channel can be quickly established. The utility model is mainly suitable for spine minimally invasive channel surgery, in particular to a parallel-opening and bottom fan-opening type opening channel fixing device which can open skin and muscle tissues during surgery and provide a wide operation view for the operator.

In order to facilitate the sliding of the driving connection arm 3 on the connection rod 1, the present utility model preferably adopts the following structural form:

as shown in fig. 3 and 5-6, the end of the connecting arm 3 near the connecting rod 1 may be provided with a sliding groove 32 through which the connecting rod 1 passes, and one side of the connecting rod 1 is provided with a tooth surface 11, wherein:

the connecting arm 3 is provided with a driving device for driving the connecting arm 3 to slide on the connecting rod 1 at one end close to the connecting rod 1, the connecting arm 3 is provided with a gear hole 33 communicated with the sliding groove 32, the driving device is a gear 34 rotationally assembled in the gear hole 33 and meshed with the tooth surface 11, and the upper end of the gear 34 is provided with an instrument driving part 35 (specifically, a plum blossom hole) extending out of the gear hole 33.

When in use, the double offset ring spanner 5 (see fig. 12) is utilized to drive the instrument driving part 35 of the gear 34 on the left connecting arm 3 (the connecting arm positioned at the left in fig. 1-2) anticlockwise, so that the gear 34 rotates anticlockwise, the gear 34 is meshed with the tooth surface 11 of the connecting rod 1, the left connecting arm 3 is driven to move leftwards relative to the connecting rod 1, the instrument driving part 35 of the gear 34 on the right connecting arm 3 (the connecting arm positioned at the right in fig. 1-2) is driven to move rightwards relative to the connecting rod 1 in a same way, and the parallel opening can be realized.

Further, in order to facilitate locking of the connecting arm 3 during the parallel opening process, one end of the connecting arm 3, which is close to the connecting rod 1, may be provided with a first locking device for locking the connecting arm 3, the first locking device may be a clamping button 36, the middle part of the clamping button 36 is hinged on the connecting arm 3, one end of the clamping button 36 is provided with a positioning tooth 361 meshed with the tooth surface 11, the other end is used as a pressing part 362, and a spring 363 is provided between the pressing part 362 and the connecting arm 3. The first locking means is preferably a one-way locking means, i.e. the positioning teeth 361 are one-way teeth to limit the reverse rotation of the gear wheel 34, so that the connecting arm 3 can slide on the connecting rod 1 in the opening direction (direction indicated by arrow in fig. 1) in the locked state, cannot slide in the reverse direction, and locks the connecting arm 3 in time, facilitating the operation in surgery.

When in use, the pressing part 362 of the clamping button 36 is pressed, the spring 363 is stressed and compressed, and the positioning teeth 361 are separated from the tooth surface 11 of the connecting rod 1, so that the connecting arm 3 is in an unlocking state, and the connecting arm 3 can retract along the connecting rod 1; when the connecting arm 3 is to be locked, the pressing portion 362 of the clamp button 36 is released, and the positioning teeth 361 are again engaged with the tooth surface 11 of the connecting rod 1 by the elastic force of the spring 363, so that the connecting arm 3 is in the locked state, and at this time, the tool driving portion 35 of the gear 34 is driven by the box spanner 5, so that the connecting arm 3 can be moved/slid unidirectionally in the expanding direction with respect to the connecting rod 1, and cannot be retracted.

The adjusting and locking device is used for driving the rotating shaft 41 to rotate in the connecting hole 31 and locking the rotating shaft 41 in the connecting hole 31 after rotating, and can adopt various structural forms which are easily thought by a person skilled in the art, for example, an adjusting rod which is vertical and extends to the upper part of the connecting arm 3 is fixedly arranged on the rotating shaft 41, and the rotating angle of the rotating shaft 41 is adjusted by pulling the adjusting rod left and right, however, for convenience in implementation, the following structural forms are preferably adopted in the utility model:

as shown in fig. 3 and 6 to 8, the side of the rotating shaft 41 may be provided with a hook piece 42, and the connecting arm 3 is provided with a through hole 37 at a position corresponding to the hook piece 42, and the adjusting and locking device is an adjusting and locking piece which is positioned in the through hole 37 and can drive the hook piece 42 to move up and down. When the pipeline retractor is used, the hook piece 42 is driven to move up and down by the adjusting locking piece, so that the rotating shaft 41 rotates in the connecting hole 31, and the angle of the pipeline retractor 2 is deflected, and the bottom fan-shaped opening is realized.

Further, the adjusting locking member preferably adopts the following structural form:

as shown in fig. 6-8, the through hole 37 may be a threaded hole, the adjusting locking member is an adjusting locking bolt 38 (may be a left-handed thread) screwed in the threaded hole, the hook piece 42 is provided with a U-shaped opening 421, the lower end of the adjusting locking bolt 38 is provided with a dumbbell-shaped plug 381 for being clamped in the U-shaped opening 421, and the upper end of the adjusting locking bolt 38 is provided with an instrument driving part 382 (may be a quincuncial hole) extending out of the threaded hole. When the double offset ring spanner is used, the instrument driving part 382 of the adjusting and locking bolt 38 on the left connecting arm 3 is rotated clockwise by the double offset ring spanner 5, the plug 381 at the lower end of the adjusting and locking bolt 38 supports the hook piece 42 to move upwards, so that the rotating shaft 41 rotates clockwise in the connecting hole 31, the angle of the left pipeline drag hook 2 can be deflected, and similarly, the instrument driving part 382 of the adjusting and locking bolt 38 on the right connecting arm 3 is rotated clockwise by the double offset ring spanner 5, so that the rotating shaft 41 rotates anticlockwise in the connecting hole 31, and the angle of the right pipeline drag hook 2 can be deflected, so that the bottom fan-shaped expansion is realized.

As shown in fig. 6, the connecting arm 3 may be provided with a transversely extending U-shaped slot 39, the bottom of the U-shaped slot 39 forms a connecting hole 31, an adjusting locking member is disposed on the upper side wall of the U-shaped slot 39, and a hook piece avoidance slot 391 is disposed on the lower side wall of the U-shaped slot 39, so that a sufficient up-down movement space can be provided for the hook piece 42, thereby increasing the rotation angle of the rotation shaft 41 in the connecting hole 31, further increasing the deflection angle of the pipe retractor 2, so as to realize a larger fan-shaped opening deflection angle, and better adjusting the surgical field.

As shown in fig. 3, 7 and 10, the pipe retractor 2 may include a retractor main body 21 and a connection plate 22 located at the upper end side of the retractor main body 21, where a plug-in post 23 is disposed on the connection plate 22, one end of the rotating arm 4 near the pipe retractor 2 is provided with a vertical plug-in hole 43 for accommodating the plug-in post 23, and a second locking device for locking the plug-in post 23 in the plug-in hole 43, so that the pipe retractor 2 is detachably connected to the rotating arm 4, and a suitable pipe retractor 2 may be detached and replaced according to the operation requirement. When in use, the pipeline drag hook 2 is held, the plug-in post 23 on the connecting plate 22 of the pipeline drag hook 2 is inserted into the plug-in hole 43 of the rotating arm 4, and the plug-in post 23 is locked in the plug-in hole 43 by the second locking device. The shape of the plug-in post 23 may be square or triangular, and the shape of the plug-in hole 43 is adapted to the shape of the plug-in post 23 to prevent the plug-in post 23 from rotating in the plug-in hole 43.

The second locking means may take various forms as will be readily apparent to those skilled in the art, and for ease of implementation, the following forms are preferred:

as shown in fig. 3, 7, 9 and 10, one side of the plug-in post 23 may be provided with a ball socket 231, an inner sidewall of the plug-in hole 43 corresponding to the ball socket 231 is provided with a steel ball hole 431, and the second locking device includes a steel ball 44 located in the steel ball hole 431 and matched with the ball socket 231, and a button 45 for driving the steel ball 44;

the rotary arm 4 is provided with a button mounting hole 46 communicated with the steel ball hole 431, the button 45 comprises a button main body 451 slidably connected in the button mounting hole 46 and a button pressing portion 452 positioned outside the button mounting hole 46, and the end of the button main body 451 is provided with an annular groove 453 for accommodating the steel ball 44.

When the push button is used, the button pressing part 452 of the push button 45 is driven, the button main body part 451 slides in the button mounting hole 46, when the annular groove 453 at the tail end of the button main body part 451 is opposite to the steel ball hole 431, the steel ball 44 can be contained in the annular groove 453, and the second locking device is in an unlocking state, so that the plug-in column 23 of the pipeline drag hook 2 can be smoothly inserted into/pulled out; when the plug-in post 23 is required to be locked, the button pressing part 452 of the button 45 is driven to stagger the annular groove 453 at the tail end of the button main body part 451 and the steel ball hole 431, the steel ball 44 protrudes out of the inner side wall of the plug-in hole 43 under the extrusion of the rod part of the button main body part 451 and is clamped into the ball socket 231 of the plug-in post 23, and the second locking device is in a locking state to lock the plug-in post 23 in the plug-in hole 43.

Further, as shown in fig. 3 and 9, a limiting groove 454 extending along the length direction of the button main body 451 may be provided at the middle of the button main body 451, a pin hole 47 is provided at a position on the rotation arm 4 corresponding to the limiting groove 454, and a limiting pin 48 is provided in the limiting groove 454 and the pin hole 47 in a penetrating manner, so as to prevent the button 45 from being separated from the button mounting hole 46. A spring 49 may be provided between the end of the button body part 451 and the bottom wall of the button mounting hole 46 to facilitate quick locking and unlocking. At this time, the push button pressing part 452 is pressed, the spring 49 is compressed under force, the annular groove 453 is matched with the steel ball hole 431, and the second locking device is in an unlocking state, so that the plugging column 23 of the pipeline drag hook 2 can be smoothly plugged in/pulled out; when the plug-in post 23 is required to be locked, the button pressing part 452 is released, the annular groove 453 is staggered with the steel ball hole 431 under the elastic force of the spring 49, and the second locking device is in a locking state so as to lock the plug-in post 23 in the plug-in hole 43.

As shown in fig. 10-11, the retractor body 21 is preferably semi-circular in shape that can be snapped into one another. The retractor body 21 may be provided with a positioning pinhole 24, and specifically, the positioning pinhole 24 may be located at a connection end of the retractor body 21 and the connection plate 22, so as to facilitate the penetration of a fixing needle, and increase the stability of the pipeline retractor 2.

The length of the retractor main body 21 can be in various specifications of 50-180mm, specifically, as shown in fig. 10 (a) and fig. 11 (a), the retractor main body 21 has a longer length (specifically, can be 100-180 mm), and the retractor main body 21 is preferably provided with a positioning pinhole 24 to increase the stability of the pipeline retractor 2, so that the retractor is suitable for the OLIF and PLIF operation modes; as shown in fig. 10 (b) and 11 (b), the length of the retractor body 21 is relatively short (specifically, 50-80mm may be used), and the retractor body 21 is not provided with a positioning pinhole 24, which is suitable for the TLIF operation type.

As shown in fig. 10 (a), the connection end of the connection plate 22 and the retractor body 21 may be provided with a light source hole 25 to conveniently accommodate a light source (e.g., an LED lamp). The middle part of the connecting plate 22 can be hinged with a pressing plate 26, and a torsion spring 29 is arranged on the hinge shaft of the pressing plate 26, so that pressure is provided by the torsion spring 29 to prevent the light source line from falling off. The inner side of the connecting plate 22 of one pipe drag hook 2 can be provided with a positioning groove 27, and the inner side of the connecting plate 22 of the other pipe drag hook 2 is provided with a positioning convex rib 28 matched with the positioning groove 27, so that when the two pipe drag hooks are buckled/closed, the two pipe drag hooks 2 are conveniently positioned and connected. As shown in fig. 5, both ends of the connecting rod 1 may be provided with U-shaped grooves 12 for connection with external fixing arms, so as to facilitate connection with the fixing arms of the external positioning device, so that the expandable channel fixing device of the present utility model is kept stable.

In summary, the utility model provides a device for fixing a channel which can stably and parallelly open and fan-shaped open at the bottom, can realize bidirectional adjustment in operation to open skin and muscle tissues, can adjust the parallel opening distance and fan-shaped opening deflection angle by using a double offset ring spanner according to operation requirements on the basis of minimizing operation incision, can meet the operation requirements of OLIF, TLIF, PLIF different operation types by simultaneously providing a pipeline drag hook, realizes a complete minimally invasive spinal channel operation scheme, is convenient to operate, can quickly establish an operation channel, and provides a wide operation field for operators.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims (10)

1. The utility model provides a can strut passageway fixing device, its characterized in that, including the connecting rod of horizontal setting, sliding connection has a pair of support that struts on the connecting rod, the end of strut all is equipped with downwardly extending's pipeline drag hook, strut the support and all include linking arm and swinging boom, wherein:

one end of the connecting arm is connected to the connecting rod in a sliding way, and the other end of the connecting arm is provided with a connecting hole extending along the length direction of the connecting arm;

one end of the rotating arm is provided with a rotating shaft which extends along the length direction and is rotatably inserted into the connecting hole, the other end of the rotating arm is provided with the pipeline drag hook, and a channel for an operation instrument to pass through is formed between the pipeline drag hooks;

the connecting arm is provided with an adjusting locking device which is used for driving the rotating shaft to rotate in the connecting hole and locking the rotating shaft in the connecting hole after the rotating shaft rotates.

2. The expandable tunnel fixation device of claim 1 wherein one end of the connecting arm near the connecting rod is provided with a sliding groove for the connecting rod to pass through, one side of the connecting rod is provided with a tooth surface, wherein:

the connecting arm is provided with a driving device for driving the connecting arm to slide on the connecting rod, the connecting arm is provided with a gear hole communicated with the sliding groove, the driving device is a gear rotationally assembled in the gear hole and meshed with the tooth surface, and the upper end of the gear is provided with an instrument driving part extending out of the gear hole;

and/or, one end of the connecting arm, which is close to the connecting rod, is provided with a first locking device for locking the connecting arm, the first locking device is a clamping button, the middle part of the clamping button is hinged on the connecting arm, one end of the clamping button is provided with a positioning tooth meshed with the tooth surface, the other end of the clamping button is used as a pressing part, and a spring is arranged between the pressing part and the connecting arm.

3. The expandable tunnel fixing device according to claim 1 or 2, wherein a hook piece is provided on a side surface of the rotation shaft, a through hole is provided at a position on the connection arm corresponding to the hook piece, and the adjustment locking device is an adjustment locking piece which is located in the through hole and can drive the hook piece to move up and down.

4. The expandable channel fixing device according to claim 3, wherein the through hole is a threaded hole, the adjusting locking piece is an adjusting locking bolt which is in threaded connection with the threaded hole, a U-shaped opening is formed in the hook piece, a dumbbell-shaped plug which is used for being clamped in the U-shaped opening is arranged at the lower end of the adjusting locking bolt, and an instrument driving part which extends out of the threaded hole is arranged at the upper end of the adjusting locking bolt.

5. The expandable tunnel fixation device according to claim 3, wherein the connecting arm is provided with a transversely extending U-shaped slot, the bottom of the U-shaped slot forms the connecting hole, the upper side wall of the U-shaped slot is provided with the adjusting locking member, and the lower side wall of the U-shaped slot is provided with a hook piece avoiding slot.

6. The expandable tunnel fixation device according to claim 3, wherein the pipe retractor comprises a retractor body and a connecting plate located on the upper end side surface of the retractor body, a plug-in post is arranged on the connecting plate, and a plug-in hole for vertically accommodating the plug-in post and a second locking device for locking the plug-in post in the plug-in hole are arranged at one end of the rotating arm, which is close to the pipe retractor.

7. The expandable passage fixing device according to claim 6, wherein a ball socket is arranged on one side of the plug-in column, a steel ball hole is arranged on an inner side wall of the plug-in hole corresponding to the ball socket, and the second locking device comprises steel balls which are positioned in the steel ball hole and matched with the ball socket, and a button for driving the steel balls;

the rotary arm is provided with a button mounting hole communicated with the steel ball hole, the button comprises a button main body part which is slidably connected in the button mounting hole and a button pressing part which is positioned outside the button mounting hole, and the tail end of the button main body part is provided with an annular groove for accommodating the steel ball.

8. The expandable passage fixing device according to claim 7, wherein a limiting groove extending along the length direction of the button main body is formed in the middle of the button main body, a pin hole is formed in a position, corresponding to the limiting groove, on the rotating arm, and a limiting pin is arranged in the limiting groove and the pin hole in a penetrating manner;

and/or a spring is arranged between the tail end of the button main body part and the bottom wall of the button mounting hole.

9. The distractable channel fixation device of claim 6, wherein the retractor body is semi-circular to enable mutual engagement;

and/or the drag hook main body is provided with a positioning pinhole.

10. The expandable passage fixation device of claim 6 wherein a light source hole is provided at a connection end of the connection plate and the retractor body;

and/or the middle part of the connecting plate is hinged with a pressing plate, and a torsion spring is arranged on a hinge shaft of the pressing plate;

and/or the inner side of the connecting plate of one pipeline drag hook is provided with a positioning groove, and the inner side of the connecting plate of the other pipeline drag hook is provided with a positioning convex rib matched with the positioning groove;

and/or both ends of the connecting rod are provided with U-shaped grooves for being connected with an external fixing arm.

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