阅读说明：本技术 一种心内科腹腔血管造影装置 (Intracardiac branch of academic or vocational study abdominal cavity angiogram device ) 是由 张晓良 于 2021-08-23 设计创作，主要内容包括：本发明属于医疗器械技术领域,提供了一种心内科腹腔血管造影装置,包括C臂和用于发射十字线形激光的十字激光器,还包括：箱体,其设置有中空的内腔,内腔的左右两内壁上设置有第一滑槽,内腔的前后两内壁上设置有第二滑槽；第一支撑架,其与箱体滑动连接,第一支撑架沿其长度方向开设有第一滑孔；第二支撑架,其与箱体滑动连接,第二支撑架沿其长度方向设置有第二滑孔；安装滑块,其左右两侧壁上设置有第一限位槽、前后两侧壁上设置有第二限位槽,安装滑块与第二支撑架和第一支撑架滑动连接；以及调节机构,其用于调节安装滑块的位置；其中,十字激光器设置在安装滑块的底部。本发明所提供的心内科腹腔血管造影装置,结构紧凑,占用空间较少。(The invention belongs to the technical field of medical instruments, and provides an abdominal cavity angiography device for the department of cardiology, which comprises a C arm, a cross laser used for emitting cross laser, and also comprises: the box body is provided with a hollow inner cavity, the left inner wall and the right inner wall of the inner cavity are provided with first sliding chutes, and the front inner wall and the rear inner wall of the inner cavity are provided with second sliding chutes; the first support frame is connected with the box body in a sliding mode, and a first sliding hole is formed in the first support frame along the length direction of the first support frame; the second support frame is connected with the box body in a sliding mode, and a second sliding hole is formed in the second support frame along the length direction of the second support frame; the mounting sliding block is provided with first limiting grooves on the left side wall and the right side wall, second limiting grooves on the front side wall and the rear side wall, and the mounting sliding block is connected with the second supporting frame and the first supporting frame in a sliding mode; and an adjustment mechanism for adjusting the position of the mounting slide; wherein, the cross laser is arranged at the bottom of the mounting slide block. The abdominal cavity angiography device for the cardiology department provided by the invention has the advantages of compact structure and less occupied space.)

1. The utility model provides a intracardiac branch of academic or vocational study abdominal cavity angiography device, includes C arm and the cross laser instrument that is used for launching the cross line shape laser, its characterized in that: further comprising:

the box body is rectangular and provided with a hollow inner cavity, the left inner wall and the right inner wall of the inner cavity are provided with first sliding grooves, and the front inner wall and the rear inner wall of the inner cavity are provided with second sliding grooves;

the first support frame is connected with the box body in a sliding mode through the first sliding groove, and a first sliding hole is formed in the first support frame along the length direction of the first support frame;

the second support frame is connected with the box body in a sliding mode through the second sliding chute and is provided with a second sliding hole along the length direction;

the mounting slide block is connected with the second support frame in a sliding manner through the first limiting groove, and the mounting slide block is connected with the first support frame in a sliding manner through the second limiting groove; and

the adjusting mechanism is arranged in the box body and is used for adjusting the position of the mounting slide block;

wherein, the cross laser is arranged at the bottom of the mounting slide block.

2. The cardiology abdominal angiography device of claim 1, wherein: the adjustment mechanism includes:

a longitudinal adjustment unit for adjusting a position of the first support frame; and

a lateral adjustment unit for adjusting a position of the second support frame.

3. The cardiology abdominal angiography device of claim 2, wherein: the longitudinal adjusting unit and the lateral adjusting unit include:

the winding drum is rotatably arranged in the box body;

the first bevel gear is rotatably arranged in the box body and is fixedly connected with the first end of the winding drum;

the second bevel gear is rotatably arranged in the box body and meshed with the first bevel gear;

the adjusting shaft is rotatably connected with the box body, the first end of the adjusting shaft is fixedly connected with the second bevel gear, and the second end of the adjusting shaft extends out of the box body;

the adjusting knob is rotatably arranged outside the box body and is fixedly connected with the second end of the adjusting shaft;

the guide wheels are rotatably arranged in the box body;

the first end of the pull rope is fixedly connected with one side of the first support frame or the second support frame, the second end of the pull rope winds around the winding drum and the guide wheels in sequence and then is fixedly connected with the other side of the first support frame or the second support frame, and the pull rope is wound on the winding drum for at least one circle; and

a locking structure for locking rotation of the spool.

4. The cardiology abdominal angiography device of claim 3, wherein: the locking structure includes:

the locking wheel is rotatably arranged in the box body and is fixedly connected with the second end of the winding drum;

the two locking sliding blocks are oppositely arranged in the box body and are in sliding connection with the box body through guide rods, and the two locking sliding blocks are respectively positioned on two sides of the locking wheel;

the screw rod is rotatably connected with the box body, a first end of the screw rod extends into the box body, a second end of the screw rod extends out of the box body, a first thread section and a second thread section which have the same thread pitch and are opposite in spiral direction are arranged on the screw rod, and the screw rod is in threaded connection with the two locking slide blocks through the first thread section and the second thread section; and

and the locking knob is rotatably arranged outside the box body and is fixedly connected with the second end of the screw rod.

5. The cardiology abdominal angiography device of claim 4, wherein: two locking slider's relative one side all is provided with the locking groove, locking groove with the locking wheel is corresponding.

6. The cardiology abdominal angiography device of claim 5, wherein: and elastic gaskets are fixedly arranged in the two locking grooves.

7. The cardiology abdominal angiography device of claim 6, wherein: and a plurality of locking teeth are arranged on the periphery of the locking wheel.

8. The cardiology abdominal angiography device of any one of claims 4-7, wherein: two limiting rings are arranged on the screw rod.

9. The cardiology abdominal angiography device of claim 8, wherein: and one side, far away from each other, of each of the two locking sliding blocks is provided with a containing groove, and the containing grooves correspond to the limiting rings.

10. The cardiology abdominal angiography device of claim 8, wherein: and the first support frame is provided with a third sliding hole, and the second support frame is in sliding connection with the first support frame through the third sliding hole.

Technical Field

The invention relates to the technical field of medical instruments, in particular to an abdominal cavity angiography device for the department of cardiology.

Background

Percutaneous puncture interventional operations (radio frequency ablation, pathological biopsy, puncture drainage and the like) play an important role in clinic. The xpergide technology in philips FD20 combines the two-dimensional perspective real-time guidance of Digital Subtraction Angiography (DSA) with CT and MR imaging technologies and applies them to percutaneous interventional procedures, greatly improving the accuracy of interventional procedures, reducing the trauma of the procedures and the radiation dose of doctors and patients, and at the same time saving the procedure time, improving the treatment efficiency and reducing the pain of patients. Clinical practice proves that the technology is safer, more effective and more economical than CT or B-ultrasonic guidance.

As shown in fig. 1, most of the current angiography machines of the Xperguide system used in domestic clinic are formed by fixing a cross laser on a single bracket and matching a C arm, and the plane of the C arm is called as the C arm plane. The C-arm has a probe plate that is rotatable about the patient by the C-arm. The bracket is provided with four joints and two adjusting knobs. After the knob is loosened, the four joints are twisted to enable the laser to be positioned at any spatial direction. When the guide puncture is carried out, a focus is scanned by CT, a puncture path is preset and a puncture point is determined. Then the two knobs are loosened, each joint is adjusted, one of the cross-shaped lasers emitted by the cross laser is enabled to be parallel to the plane of the C arm, the cross point is positioned to the puncture point, and then the two adjusting knobs are screwed down to fix the position of the cross laser. When the angiography machine is used for CT-guided puncture, one of the crosshair-shaped lasers must be adjusted to be parallel to the plane of the C-arm, and then the crosshair is positioned to the puncture point, so that the operation is troublesome. And the four joints of the bracket move freely, so that a person who needs to be trained can skillfully adjust one of the cross-shaped lasers to be parallel to the plane of the C arm, and the precision is not high due to subjective judgment of an operator.

As shown in fig. 2, the patent of the invention with the publication number of CN103494614B provides an angiography machine convenient for laser positioning, the cross laser moves through the adjustment of the adjustment device, during the adjustment process, the cross laser is always parallel to the plane of the C arm, one of the cross lasers emitted by the cross laser is always parallel to the plane of the C arm, and meanwhile, through the corresponding matching of each rack and the gear bar, the moving position of the cross laser can be freely adjusted after the manual dial is manually adjusted, so that the operation and use are more flexible, the adjustment is more convenient, and the positioning and guiding are more accurate.

However, the above angiography machine facilitating laser positioning has disadvantages in that: the transverse and longitudinal adjustment of the angiography machine is realized by utilizing the rack and the gear rod, the rack needs to penetrate out of the support box, the larger the adjustment range is, the longer the length of the rack is, and therefore the angiography machine is not compact in structure and occupies a larger space.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an abdominal cavity angiography device for the department of cardiology, which has a compact structure and saves space.

In order to achieve the above object, the present invention provides an abdominal cavity angiography device for cardiology department, including a C-arm and a cross laser for emitting a cross laser, further including:

the box body is rectangular and provided with a hollow inner cavity, the left inner wall and the right inner wall of the inner cavity are provided with first sliding grooves, and the front inner wall and the rear inner wall of the inner cavity are provided with second sliding grooves;

the first support frame is connected with the box body in a sliding mode through the first sliding groove, and a first sliding hole is formed in the first support frame along the length direction of the first support frame;

the second support frame is connected with the box body in a sliding mode through the second sliding chute and is provided with a second sliding hole along the length direction;

the mounting slide block is connected with the second support frame in a sliding manner through the first limiting groove, and the mounting slide block is connected with the first support frame in a sliding manner through the second limiting groove; and

the adjusting mechanism is arranged in the box body and is used for adjusting the position of the mounting slide block;

wherein, the cross laser is arranged at the bottom of the mounting slide block.

Further, the adjustment mechanism includes:

a longitudinal adjustment unit for adjusting a position of the first support frame; and

a lateral adjustment unit for adjusting a position of the second support frame.

Further, the longitudinal adjusting unit and the lateral adjusting unit include:

the winding drum is rotatably arranged in the box body;

the first bevel gear is rotatably arranged in the box body and is fixedly connected with the first end of the winding drum;

the second bevel gear is rotatably arranged in the box body and meshed with the first bevel gear;

the adjusting shaft is rotatably connected with the box body, the first end of the adjusting shaft is fixedly connected with the second bevel gear, and the second end of the adjusting shaft extends out of the box body;

the adjusting knob is rotatably arranged outside the box body and is fixedly connected with the second end of the adjusting shaft;

the guide wheels are rotatably arranged in the box body;

the first end of the pull rope is fixedly connected with one side of the first support frame or the second support frame, the second end of the pull rope winds around the winding drum and the guide wheels in sequence and then is fixedly connected with the other side of the first support frame or the second support frame, and the pull rope is wound on the winding drum for at least one circle; and

a locking structure for locking rotation of the spool.

Further, the locking structure includes:

the locking wheel is rotatably arranged in the box body and is fixedly connected with the second end of the winding drum;

the two locking sliding blocks are oppositely arranged in the box body and are in sliding connection with the box body through guide rods, and the two locking sliding blocks are respectively positioned on two sides of the locking wheel;

the screw rod is rotatably connected with the box body, a first end of the screw rod extends into the box body, a second end of the screw rod extends out of the box body, a first thread section and a second thread section which have the same thread pitch and are opposite in spiral direction are arranged on the screw rod, and the screw rod is in threaded connection with the two locking slide blocks through the first thread section and the second thread section; and

and the locking knob is rotatably arranged outside the box body and is fixedly connected with the second end of the screw rod.

Further, two the relative one side of locking slider all is provided with the locking groove, locking groove with the locking wheel is corresponding.

Further, elastic gaskets are fixedly arranged in the two locking grooves.

Further, a plurality of locking teeth are arranged on the periphery of the locking wheel.

Furthermore, two limiting rings are arranged on the screw rod.

Furthermore, one side of two locking slide blocks that keep away from each other is provided with the holding tank, the holding tank with the spacing ring is corresponding.

Furthermore, a third sliding hole is formed in the first support frame, and the second support frame is connected with the first support frame in a sliding mode through the third sliding hole.

The invention has the beneficial effects that:

according to the abdominal cavity angiography device for the cardiology department, the winding drum is driven to wind and release the rope by rotating the adjusting knob, so that the purpose of changing the position of the cross laser is achieved, the structure is compact, and the occupied space is small.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a perspective view of a prior art angiographic apparatus;

FIG. 2 is a perspective view of an angiographic machine facilitating laser positioning as provided in the patent publication CN 103494614B;

FIG. 3 is a perspective view of a laparoscopic angiographic apparatus for cardiology department according to an embodiment of the present invention;

FIG. 4 is a top view of the housing of the cardiology abdominal angiography device shown in FIG. 3;

FIG. 5 is a greatly enlarged view taken at A in FIG. 4;

FIG. 6 is a greatly enlarged view at B shown in FIG. 4;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 4;

FIG. 8 is a cross-sectional view taken in the direction D-D of FIG. 4;

FIG. 9 is a greatly enlarged view at E shown in FIG. 7;

FIG. 10 is a greatly enlarged view at F of FIG. 8;

FIG. 11 is a perspective view of a mounting block of the abdominal angiography device for cardiology department provided in the present invention;

FIG. 12 is a perspective view of the combination of the spool, the first bevel gear and the locking wheel of the laparoscopic cardiology angiography device of the present invention;

FIG. 13 is a perspective view of a screw of the intracardiac abdominal angiography device provided in the present invention;

fig. 14 is a perspective view of the locking slider of the abdominal cavity angiography device in the cardiology department provided in the present invention.

Reference numerals:

100-C arm, 200-cross laser, 300-box, 310-inner cavity, 320-first sliding groove, 330-second sliding groove, 400-first supporting frame, 410-first sliding hole, 420-third sliding hole, 500-second supporting frame, 510-second sliding hole, 600-installation sliding block, 610-first limiting groove, 620-second limiting groove, 710-longitudinal adjusting unit, 720-transverse adjusting unit, 701-winding drum, 702-first bevel gear, 703-second bevel gear, 704-adjusting shaft, 705-adjusting knob, 706-guide wheel, 707-pulling rope, 800-locking structure, 810-locking wheel, 811-locking tooth, 820-locking sliding block, 821-locking groove, 822-accommodating groove, 830-screw rod and locking groove, 831-limit ring, 840-locking knob, 850-elastic liner.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 3-14, the present invention provides a cardiology abdominal angiography device including a C-arm 100 and a cross laser 200 for emitting a cross laser. Wherein the C-arm 100 has a C-arm surface.

The radiography apparatus further includes a case 300, a first support frame 400, a second support frame 500, a mounting slider 600, and an adjusting mechanism.

The box 300 is rectangular, and the box 300 has a hollow inner cavity 310. Specifically, the bottom of the inner cavity 310 is open. The left and right inner walls of the inner cavity 310 are provided with first sliding grooves 320, and the front and rear inner walls of the inner cavity 310 are provided with second sliding grooves 330.

The first support frame 400 is slidably connected to the box 300 through the first sliding groove 320, and a first sliding hole 410 is formed in the first support frame 400 along the length direction thereof, specifically, the first sliding hole 410 is a through hole. The second supporting frame 500 is slidably connected to the box 300 through the second sliding groove 330, and a second sliding hole 510 is formed in the second supporting frame 500 along the length direction thereof, specifically, the second sliding hole 510 is a through hole.

First limiting grooves 610 are formed in the left side wall and the right side wall of the installation sliding block 600, second limiting grooves 620 are formed in the front side wall and the rear side wall of the installation sliding block 600, the installation sliding block 600 is connected with the second supporting frame 500 in a sliding mode through the first limiting grooves 610, and the installation sliding block 600 is connected with the first supporting frame 400 in a sliding mode through the second limiting grooves 620. Specifically, the mounting slider 600 is mounted in the first and second slide holes 410 and 510 and slidably connected to the second support frame 500 and the first support frame 400 through the first and second limit grooves 610 and 620, respectively. When in use, when the first supporting frame 400 moves and the second supporting frame 500 keeps still, the slider can only move along the length direction of the second sliding hole 510 under the action of the second slider; when the first support frame 400 is kept still and the second support frame 500 moves, the slider can only move along the length direction of the first slide hole 410 under the action of the first support frame 400; in this way, the position of the slider 600 can be changed by changing the positions of the first support frame 400 and the second support frame 500, so as to change the position of the cross laser 200.

An adjustment mechanism is installed in the case 300 for adjusting a position where the slider 600 is installed. Specifically, the adjusting mechanism is used to change the positions of the first supporting frame 400 and the second supporting frame 500, thereby achieving the purpose of changing the position of the mounting slider 600. The cross laser 200 is mounted on the bottom of the mounting slider 600. Specifically, the cross laser 200 protrudes downward from an opening at the bottom of the housing 300, and the laser output direction of the cross laser 200 is parallel to the plane of the C-arm 100.

When the cross laser device is used, the purpose of changing the position of the cross laser device 200 can be achieved by changing the first support frame 400 and the second support frame 500, and the first support frame 400 and the second support frame 500 are always kept in the box body 300, so that the structure is compact, and the occupied space is small.

In one embodiment, the adjustment mechanism includes a longitudinal adjustment unit 710 and a lateral adjustment unit 720.

Wherein the longitudinal adjusting unit 710 is used to adjust the position of the first support frame 400. The lateral adjustment unit 720 is used to adjust the position of the second support stand 500.

When in use, the longitudinal adjusting unit 710 adjusts the position of the first support frame 400, so as to achieve the purpose of changing the longitudinal position of the cross laser 200; the position of the second supporting frame 500 is adjusted through the transverse adjusting unit 720, so that the purpose of changing the transverse position of the cross laser 200 is achieved; in this way, the cross laser 200 can be moved to any position by the cooperation of the longitudinal adjusting unit 710 and the transverse adjusting unit 720.

In one embodiment, the longitudinal adjustment unit 710 and the lateral adjustment unit 720 include a spool 701, a first bevel gear 702, a second bevel gear 703, an adjustment shaft 704, an adjustment knob 705, a guide wheel 706, a pull rope 707, and a locking structure 800.

Wherein the spool 701 is rotatably mounted within the housing 300. A first bevel gear 702 is rotatably mounted in the housing 300 and is fixedly coupled to a first end of the spool 701. Preferably, the first bevel gear 702 is integrally formed with the spool 701. A second bevel gear 703 is rotatably mounted in the housing 300 and meshes with the first bevel gear 702. The adjusting shaft 704 is rotatably connected to the housing 300, a first end of the adjusting shaft 704 is fixedly connected to the second bevel gear 703, and a second end of the adjusting shaft extends out of the housing 300. An adjusting knob 705 is rotatably mounted outside the case 300 and is fixedly coupled to a second end of the adjusting shaft 704. The guide wheels 706 are provided in plural numbers, and the plural guide wheels 706 are rotatably installed in the case 300. The first end of the pulling rope 707 is fixedly connected with one side of the first support frame 400 or the second support frame 500, and the second end of the pulling rope passes around the winding drum 701 and the plurality of guide wheels 706 in sequence and is fixedly connected with the other side of the first support frame 400 or the second support frame 500. Specifically, two ends of the pull rope 707 of the longitudinal adjustment unit 710 are respectively fixedly connected with two sides of the first support frame 400; both ends of the pull rope 707 of the lateral adjustment unit 720 are fixedly connected to both sides of the second support frame 500, respectively. The pull rope 707 is wound around the drum 701 at least once. Just can reach the purpose that when drawing one end rolling, the other end was released through rotating reel 701 during the use, and then reach the purpose that changes the position of first support frame 400 and second support frame 500. The locking structure 800 is used to lock the rotation of the spool 701. During use, the position of the second support frame 500 is prevented from being changed through the installation sliding block 600 when the position of the first support frame 400 is adjusted, or the position of the first support frame 400 is changed through the installation sliding block 600 when the position of the second support frame 500 is adjusted, so that the purpose of accurately adjusting the position of the cross laser 200 is achieved, meanwhile, when the cross laser 200 is adjusted to a proper position, the transverse adjusting unit 720 and the winding drum 701 of the longitudinal adjusting unit 710 are locked through the locking structure 800, and the purpose of locking the position of the cross laser 200 is achieved.

When the device is used, the adjusting knob 705 is rotated, and the adjusting knob 705 drives the second bevel gear 703 to rotate through the adjusting shaft 704; the second bevel gear 703 drives the winding drum 701 to rotate through the first bevel gear 702, and the winding drum 701 drives one end of the rope to wind and the other end of the rope to release, so that the purpose of changing the positions of the first support frame 400 and/or the second support frame 500 is achieved, and the purpose of changing the position of the cross laser 200 is achieved.

Wherein, when the position of the second support frame 500 is adjusted by the transverse adjusting unit 720, the locking structure 800 of the longitudinal adjusting unit 710 locks the reel 701 thereof; similarly, when the position of the first support frame 400 is adjusted by the longitudinal adjustment unit 710, the locking structure 800 of the lateral adjustment unit 720 locks the reel 701 thereof.

The transverse driving unit and the longitudinal driving unit of the structure achieve the purpose of adjusting the positions of the first support frame 400 and the second support frame 500 by driving and stretching the adjusting knob 705, and have compact structure and less occupied space. Meanwhile, the reel 701 is locked by the locking structure 800, so that the position of the cross laser 200 can be locked, and the transverse adjusting unit 720 and the longitudinal adjusting unit 710 are not affected by each other.

In one embodiment, the locking structure 800 includes a locking wheel 810, a locking slider 820, a threaded rod 830, and a locking knob 840.

Wherein, the locking wheel 810 is rotatably installed in the box 300, and the locking wheel 810 is fixedly connected with the second end of the winding drum 701. Preferably, the locking wheel 810 is integrally formed with the spool 701.

The number of the locking sliders 820 is two, the two locking sliders 820 are oppositely arranged in the case 300 and are slidably connected with the case 300 through a guide rod, and the two locking sliders 820 are respectively located at two sides of the locking wheel 810. In use, the positions of the two locking sliders 820 are changed to lock and unlock the spool 701. Specifically, when the two locking sliders 820 approach each other and tighten the locking wheel 810, the purpose of locking the spool 701 can be achieved; when the two lock sliders 820 are away from the lock wheel 810, the purpose of releasing the lock of the spool 701 is achieved.

The screw 830 is rotatably coupled to the case 300. Specifically, a first end of the screw 830 extends into the box 300, a second end extends out of the box 300, a first thread section and a second thread section which have the same thread pitch and are opposite in spiral direction are formed on the screw 830, and the screw 830 is in threaded connection with the two locking sliders 820 through the first thread section and the second thread section. When the locking device is used, the two locking sliders 820 can be far away from or close to each other under the action of the first thread section and the second thread section by rotating the screw 830, so that the purposes of locking and unlocking are achieved. The locking knob 840 is rotatably installed outside the case 300 and is fixedly coupled to the second end of the screw 830.

When the locking device is used, the locking knob 840 is rotated, the locking knob 840 drives the screw 830 to rotate, and the screw 830 drives the two locking sliders 820 to move close to or away from each other, so that the purposes of locking and unlocking are achieved. Specifically, when the locking knob 840 drives the screw 830 to rotate in the forward direction, the screw 830 drives the two locking sliders 820 to approach each other, so that the two locking sliders 820 clamp the locking wheel 810, thereby achieving the purpose of locking the spool 701; when the locking knob 840 drives the screw 830 to rotate reversely, the screw 830 drives the two locking sliders 820 to move away from each other, so that the two locking sliders 820 move away from the locking wheel 810, and the purpose of unlocking the spool 701 is achieved.

The locking structure 800 of this structure has a simple structure.

In one embodiment, opposite sides of the two locking sliders 820 are each opened with a locking groove 821, and the locking grooves 821 correspond to the locking wheels 810.

By providing the locking groove 821, the contact area between the locking slider 820 and the locking wheel 810 is increased, and the locking effect is enhanced.

In one embodiment, an elastic gasket 850 is fixedly disposed in the two locking grooves 821. In use, when the two locking sliders 820 clamp the locking wheel 810, the locking wheel 810 compresses the resilient pad 850, thereby enhancing the locking effect.

In one embodiment, the periphery of the locking wheel 810 is provided with a number of locking teeth 811. In use, when the two locking sliders 820 clamp the locking wheel 810, the locking wheel 810 compresses the resilient pad 850, and the locking teeth 811 at the periphery of the locking wheel 810 are embedded in the resilient pad 850, thereby achieving the purpose of enhancing the locking effect.

In one embodiment, two retaining rings 831 are provided on the threaded rod 830. The purpose of limiting the moving distance of the two locking sliders 820 is achieved by arranging two limiting rings 831 on the screw 830, so that the locking sliders 820 are prevented from being disengaged from the screw 830 in the unlocking process.

In one embodiment, the two locking sliders 820 are provided with receiving grooves 822 at sides far away from each other, and the receiving grooves 822 correspond to the retaining rings 831. The locking structure 800 can be made compact by opening the receiving groove 822 to receive the retaining ring 831.

In one embodiment, the first supporting frame 400 is provided with a third sliding hole 420, and the second supporting frame 500 is slidably connected to the first supporting frame 400 through the third sliding hole 420.

In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.