A portable dilation device for cervical surgery

Abstract

The present invention relates to a portable expansion device for cervical surgery, comprising an upper expansion piece, a lower expansion piece, at least one side expansion piece and a positioning sleeve, wherein the upper expansion piece and the lower expansion piece are rotatably connected and positioned by an expansion fixing mechanism, the positioning sleeve is rotatably connected to the upper expansion piece, the side expansion piece is rotatably connected to the positioning sleeve, the side expansion piece comprises a flank, a positioning hook and a sleeve arranged on the flank, the positioning sleeve comprises a connecting ring nested on the upper expansion piece, a positioning buckle corresponding to the positioning hook and a second shaft pin matched with the sleeve are arranged at the end of the connecting ring, the sleeve is an open sleeve, the positioning hook is also provided with a wrench matched with a handle at the end of the flank, and the expansion fixing mechanism is a spiral fixing mechanism. Compared with the prior art, the present invention has the advantages of convenient operation and low manufacturing cost.

Description

Technical Field

[0001] The invention belongs to the field of medical devices and relates to a vaginal dilator, in particular to a portable dilator used in cervical surgery. Background Art

[0002] Vaginal dilators are commonly used gynecological examination and surgical instruments, used to expose the examination site or surgical site. Commonly used vaginal dilators include upper and lower wings that can be opened and closed in a duckbill shape. The upper and lower wings are kept open at a certain angle by the positioning device on the dilator. The doctor observes, examines and performs surgery through the field of view of the upper and lower wings. In fact, due to the limitation of the width of the upper and lower wings themselves, and after the upper and lower wings are opened, the vaginal wall between the upper and lower wings will be filled back into the opened area, thereby reducing the exposure range and bringing difficulties to the examination or surgery.

[0003] Chinese patent CN101869735B discloses a vaginal dilator with double side wings, including an upper wing, and a handle integral with the upper wing and extending downward along one side of the upper wing at an obtuse angle thereto, a lower wing, and a handle integral with the lower wing and extending downward along one side of the lower wing at a direction nearly at a right angle thereto, the two sides of the rear ends of the upper wing and the lower wing are respectively connected by pins, the handle and the handle can be engaged with each other through a first expansion and fixing device, and also includes an arc-shaped active positioning sleeve, the two ends of the sleeve are connected to the two sides of the rear end of the upper wing through the active positioning sleeve shaft pin, a mounting seat is respectively provided on the outer sides of the two ends of the active positioning sleeve, the mounting seat has a mounting hole for receiving the side wing that can be folded between the upper and lower wings, and the rear part of the side wing is provided with a second expansion and fixing device that can be engaged with the upper part of the rear end of the upper wing. When in use, the upper and lower wings are inserted into the vagina in a state where they are closed and the two side wings are folded between the upper and lower wings, and the upper and lower wings are opened to the desired field of view by controlling the handle and the handle, and the field of view is maintained by the first expansion and fixing device, and then the rear ends of the left and right wings are controlled in opposite directions to open the two side wings to the desired field of view, and then the rear part of the side wings is engaged with the second expansion and fixing device at the upper part of the rear end of the upper wing. At this time, the vagina, cervix, and surgery can be observed and inspected through the expanded field of view of the upper and lower wings and the left and right wings. However, the expander still has problems such as inconvenient expansion of the side wings and troublesome manufacturing process.

[0004] With the continuous advancement of technology, more and more electronic products are used in medical devices, and vaginal dilators are also required to have functions such as lighting and video.

[0005] For example, U.S. Patent 6,024,696 discloses a "sidewall supported speculum", i.e., a four-wing vaginal dilator, which has more than twenty parts, a complex structure, cumbersome and laborious operation, and a high cost. A sidewall supported four-wing speculum includes an upper expansion piece including an upper wing, a push handle and an upper grip, the upper grip is connected to the upper wing by a pin, the upper wing is also provided with a smoke exhaust setting device for placing a smoke exhaust pipe, and a lower expansion piece including a lower wing and a second grip, the grip and the second grip are fixed with screws and nuts, left and right expansion pieces are provided between the upper and lower wings, the rear parts of the left and right expansion pieces extend to the left and right to form a left and right wing, a pin extends forward and backward from the wing, the pin passes through the front and rear positioning grooves provided at the rear end of the lower wing, and there are left and right mounting screw holes above the grip for installing spring pressing pieces to buckle the rear axons of the left and right expansion pieces to maintain the position of the left and right expansion pieces when they are upright. The defect is that such a complex structure cannot make the left and right expansion pieces expand outward, nor can it make the left and right expansion pieces retract inward! The only way for the left and right dilators to support the side wall of the vagina is to "lie down" or "stand upright". This will inevitably lead to a small surgical space, insufficient surgical field, and lack of practical value.

[0006] In addition, vaginal dilators are generally disposable devices. After using vaginal dilators with a large number of bacteria and viruses, they are usually collected in a centralized manner in the clinic so that they can be disinfected and cleaned by a third-party medical waste disposal agency designated by the disease control department, and then destroyed and used as plastic particles. However, there are still many management loopholes and links in the recycling or treatment process. If they are not properly managed, they may be recycled by illegal personnel, and they may flow into the clinic for secondary use without strict sterilization, resulting in cross-infection of diseases, which may cause serious health damage to both doctors and patients. Therefore, it is necessary to improve the existing dilators. Summary of the invention

[0007] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a portable dilation device with a simple structure for use in cervical surgery.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] A portable expansion device for use in cervical surgery comprises an upper expansion piece, a lower expansion piece, at least one side expansion piece and a positioning sleeve, wherein the upper expansion piece and the lower expansion piece are rotatably connected and positioned by an expansion fixing mechanism, the positioning sleeve is rotatably connected to the upper expansion piece, and the side expansion piece is rotatably connected to the positioning sleeve, the side expansion piece comprises a side wing, a positioning hook and a shaft sleeve arranged on the side wing, the positioning sleeve comprises a connecting ring nested on the upper expansion piece, a positioning buckle corresponding to the positioning hook and a second shaft pin matched with the shaft sleeve are arranged at the end of the connecting ring, the shaft sleeve is an open shaft sleeve, and the positioning hook is also provided with a wrench matched with the handle located at the end of the side wing, and the expansion fixing mechanism is a spiral fixing mechanism.

[0010] Preferably, the expansion angle between the upper expansion piece and the lower expansion piece in the maximum expansion state is greater than 40°.

[0011] Preferably, the side expansion piece can be expanded laterally to a visual field required for clinical surgery.

[0012] Furthermore, one end of the positioning hook is fixedly connected to the side wing, and the other end is a free end, and the wrench is arranged on the free end.

[0013] Furthermore, the inner side surface of the end of the connecting ring is provided with a third axle pin for connecting with the upper expansion piece, the positioning buckle is arranged on the outer side surface of the end of the connecting ring, and the second axle pin is vertically installed on the positioning buckle.

[0014] Furthermore, the positioning buckle is formed by the end of the connecting ring extending vertically outward, so that the positioning buckle is formed on the left and right edges of the positioning sleeve.

[0015] Furthermore, a toggle member for toggling the position of the positioning sleeve is provided in the middle of the connecting ring.

[0016] Preferably, the toggle member is a protrusion arranged in the middle of the outer side of the connecting ring.

[0017] Preferably, the toggle member is formed in the shape of a groove in the middle of the outer side of the connecting ring.

[0018] Furthermore, a limiting block is provided in the middle of the connecting ring.

[0019] Furthermore, the positioning hook and the shaft sleeve are both arranged on one side of the flank surface facing the upper expansion piece and the lower expansion piece.

[0020] Furthermore, the spiral fixing mechanism includes a positioning seat and a spiral fixing piece integrally formed on the positioning seat, the positioning seat is connected to the handle side hole of the lower expansion piece through an inclined pad, and the upper expansion piece is provided with a handle hole for passing through and fixing the position of the spiral fixing piece.

[0021] Furthermore, a self-destruct strip is integrally formed on the positioning seat, and one of the self-destruct strip and the fixing piece is an elastic piece. The positioning seat is fixed in the side hole of the handle and the inclined pad through the front and rear tension of the self-destruct strip and the fixing piece, and is completely destroyed after use by the self-destruct strip.

[0022] Preferably, the end of the self-destruct strip has a self-destruct strip crown, and the self-destruct strip crown overlaps with the side wall of the side hole of the handle.

[0023] Furthermore, the expander is also connected to a smoker, and the smoker is connected to a smoke exhaust pipe clamped on the upper expander, the lower expander or the side expander.

[0024] Preferably, a filter element is provided on the smoke exhaust pipe.

[0025] Preferably, the smoking device is connected to a rear smoke exhaust pipe, an activated carbon adsorption pipe and a front smoke exhaust pipe in sequence, and the front smoke exhaust pipe is fixed to the inner side of the lower expansion piece.

[0026] Preferably, the above-mentioned axle pins are slightly larger at both ends and slightly smaller in the middle, solid in the lower middle part, and split in the upper middle part, which are elastic, and the edge diameter of the split is slightly larger than the split diameter. The overall structure is dumbbell-shaped, and the rotation and disassembly are light, convenient and practical.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention has a simple structure and is portable.

[0029] 2. The present invention arranges an open-type shaft sleeve on the side expansion piece, and an axle pin matching the open-type shaft sleeve is arranged on the positioning sleeve. The open-type shaft sleeve can be easily installed by simply inserting the axle pin.

[0030] 3. The manufacturing mold of the positioning sleeve of the present invention is simple, no "core pulling" is required during production, the cost is low, and demoulding is convenient and fast.

[0031] 4. The existing expander with side wings only forms a handle at the end, which makes it difficult to connect and disengage the hook in clinical operation, and the operation is inconvenient; while the present invention also has a wrench on the positioning hook. During clinical use, as long as the handle at the end of the side expander is pinched with the wrench, the positioning hook of the side expander will be tilted up, which is very convenient to enter the positioning buckle of the positioning sleeve, and to adjust and fix, and the operation is more convenient. The original defects of the known technology have been fundamentally changed and improved, so it has practicality.

[0032] 5. The positioning buckle of the present invention is formed by the end of the connecting ring extending vertically outward, so that the positioning buckle is formed on the left and right edges of the positioning sleeve, effectively increasing the surgical space.

[0033] 6. The present invention is provided with a self-destruct strip, which can be quickly broken off after the operation is completed, so as to achieve instant destruction and improve the safety of the device.

[0034] 7. The present invention can be connected to a smoking device, and the overall structure is compact and portable, which is convenient for medical staff to carry the device when going out for inspection and surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the structure in an expanded state of an embodiment of the present invention;

[0036] Figure 2 It is a schematic diagram of the expansion state of an embodiment of the present invention from another angle;

[0037] Figure 3 A front view of an embodiment of the present invention;

[0038] Figure 4 A rear view of an embodiment of the present invention;

[0039] Figure 5 A bottom view of another embodiment of the present invention;

[0040] Figure 6 It is a structural schematic diagram of an embodiment of the present invention with a smoking device;

[0041] Figure 7 A schematic diagram of a closed state structure of another embodiment of the present invention;

[0042] Figure 8 for Figure 7 An enlarged schematic diagram of the middle circle;

[0043] Fig. 9 This is a schematic diagram of the structure in an expanded state of another embodiment of the present invention;

[0044] Fig.10 for Fig. 9 An enlarged schematic diagram of the middle circle;

[0045] Fig.11 A schematic diagram of the self-destruct strip when it is destroyed after use;

[0046] Fig.12 A schematic diagram of the structure of an upper expansion piece according to an embodiment of the present invention;

[0047] Fig.13 A schematic diagram of the structure of a lower expansion piece in one direction according to an embodiment of the present invention;

[0048] Fig.14 A schematic diagram of the structure of the lower expansion piece in another direction according to an embodiment of the present invention;

[0049] Fig.15 A schematic diagram of the positioning sleeve structure of an embodiment of the present invention;

[0050] Fig.16 This is a schematic diagram of the side expansion piece structure of an embodiment of the present invention;

[0051] Fig.17 A schematic diagram of the structure of a screw rod according to an embodiment of the present invention;

[0052] Fig.18 This is a schematic diagram of the structure of the screw after the deformation of the present invention;

[0053] Fig.19 It is a structural schematic diagram of another embodiment of the present invention;

[0054] Among them, 01, upper expansion piece, 02, lower expansion piece, 03, positioning sleeve, 04, side expansion piece, 05, front exhaust pipe, 06, with activated carbon adsorption tube, 07, rear exhaust pipe, 08, smoking device, 01-1, upper wing, 01-2, handle, 01-3, first axis pin, 01-4, third axis hole, 01-5, upper wing positioning groove, 01-8, handle hole, 01-9, hook, 02-1, lower wing, 02-2, handle, 02-3, first axis hole, 02-7, protrusion, 0 2-8, hole beside the handle, 02-9, oblique pad, 02-10, buckle, 03-1, connecting ring, 03-2, third axis pin, 03-3, positioning buckle, 03-4, second axis pin, 04-1, side wing, 04-2, handle, 04-3, shaft sleeve, 04-4, positioning hook, 04-5, wrench, 09-12, positioning seat, 09-13, front dome of screw, 09-14, screw, 09-15, nut, 09-16, self-destruct strip, 09-17, self-destruct strip crown. DETAILED DESCRIPTION

[0055] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0056] Example 1

[0057] like Figure 1-Figure 4As shown, this embodiment provides a portable expansion device for cervical surgery, including an upper expansion sheet 01, a lower expansion sheet 02, a side expansion sheet 04 and a positioning sleeve 03. The upper expansion sheet 01 and the lower expansion sheet 02 are rotatably connected and positioned by an expansion fixing mechanism 09. The positioning sleeve 03 is rotatably connected to the upper expansion sheet 01. The side expansion sheet 04 is rotatably connected to the positioning sleeve 03. The expansion angle between the upper expansion sheet 01 and the lower expansion sheet 02 in the maximum expansion state is greater than 40°. The side expansion sheet can be hidden in the space formed by the upper expansion sheet 01 and the lower expansion sheet 02 or expanded outward to a required angle, which can meet the field of view requirements of clinical surgery.

[0058] like Figure 12-14 As shown, the upper expansion piece 01 includes an upper wing 01-1 and a handle 01-2 which is integral with the upper wing 01-1 and extends downward along one side of the upper wing 01-1 at an obtuse angle thereto, and the lower expansion piece 02 includes a lower wing 02-1 and a handle 02-2 which is integral with the lower wing 02-1 and extends downward along one side of the lower wing 02-1 at a nearly right angle thereto, first axle pins 01-3 are provided on both sides of the rear end of the upper wing 01-1, and first axle holes 02-3 corresponding to the first axle pins 01-3 are provided on both sides of the rear end of the lower wing 02-1, so as to realize the pin-shaft connection between the upper expansion piece 01 and the lower expansion piece 02, and further realize the change of the expansion angle between the upper expansion piece 01 and the lower expansion piece 02. After the expansion angles of the upper expansion piece 01 and the lower expansion piece 02 are determined, they are positioned by an expansion fixing mechanism, which is provided on the sides of the handle 01-2 and the handle 02-2.

[0059] like Fig.16 As shown, the side expansion piece 04 includes a side wing 04-1, a positioning hook 04-4 and a sleeve 04-3 arranged on the side wing 04-1, the sleeve 04-3 is an open sleeve, the positioning hook 04-4 is also provided with a wrench 04-5, and the end of the side wing 04-1 is a handle 04-2, and the expansion angle of the side expansion piece 04 is quickly adjusted through the interaction between the handle 04-2 and the wrench 04-5. One end of the positioning hook 04-4 is fixedly connected to the side wing 04-1, and the other end is a free end, and the wrench 04-5 is arranged at the free end to maximize the interaction between the handle 04-2 and the wrench 04-5. After the operation is completed, the doctor pinches the wrench 04-5 and the handle 04-2 together, and the wrench 04-5 will pull the positioning hook 04-4 and use its elasticity to easily detach from the positioning buckle 03-3, and easily recycle the side wing 04-1 between the upper and lower expansion pieces.

[0060] like Fig.15As shown, the positioning sleeve 03 includes a connecting ring 03-1 nested on the upper expansion piece 01, and the connecting ring 03-1 is connected to the third shaft hole 01-4 on the upper expansion piece 01 through the third shaft pin 03-2. The end of the connecting ring 03-1 is provided with a positioning buckle 03-3 corresponding to the positioning hook 04-4 and a second shaft pin 03-4 matched with the shaft sleeve 04-3. The third shaft pin 03-2 is provided on the inner side of the end of the connecting ring 03-1, the positioning buckle 03-3 is provided on the outer side of the end of the connecting ring 03-1, and the second shaft pin 03-4 is vertically installed on the positioning buckle 03-3. The positioning buckle 03-3 is formed by the end of the connecting ring 03-1 extending vertically outward, so that the positioning buckle 03-3 is formed on the left and right edges of the positioning sleeve, which effectively increases the inner diameter spacing when the side expansion piece is expanded to the maximum gear.

[0061] The positioning sleeve 03 is sleeved on the upper expansion piece 01, and the upper expansion piece 01 is also provided with an upper wing positioning groove 01-5 for limiting the positioning sleeve 03, and a limiting block is correspondingly provided on the inner side of the connecting ring 03-1.

[0062] like Figure 4 As shown, the upper expansion piece 01 is provided with a hook 01-9, and the lower expansion piece 02 is provided with a buckle 02-10 corresponding to the hook 01-9, so as to further realize the connection between the upper expansion piece 01 and the lower expansion piece 02. Preferably, a buckle baffle is also provided on the lower expansion piece 02 to block the hook 01-9 and prevent excessive expansion, and the position of the buckle baffle is set according to needs.

[0063] References Figure 7-10 As shown, the expansion and fixing mechanism 09 is a spiral fixing mechanism, including a positioning seat 09-12 and a spiral fixing part integrally formed on the positioning seat 09-12, the positioning seat 09-12 is connected to the handle side hole 02-8 of the lower expansion piece 02 through an inclined pad 02-9, and the upper expansion piece 01 is provided with a handle hole 01-8 for passing and fixing the position of the spiral fixing part, so as to facilitate expansion, adjustment and fixation according to the size of the inspected field of view or the surgical range.

[0064] In this embodiment, Fig.17 As shown, the spiral fixing member includes a screw rod 09-14 and a nut 09-15, the screw rod 09-14 extends upward from the positioning seat 09-12, passes through the handle side hole 02-8 and the handle hole 01-8 in sequence, and is connected to the nut 09-15, and the expansion angle between the upper wing 01-1 and the lower wing 02-1 is fixed by adjusting the different positions of the nut 09-15 on the screw rod 09-14. The diameter of the nut 09-15 is larger than the width of the handle hole 01-8 to facilitate clamping.

[0065] The axle pins in the device are all slightly larger at both ends, slightly smaller in the middle, solid in the middle and lower parts, and open in the middle and upper parts, which are elastic, and the edge diameter of the open pieces is slightly larger than the diameter of the open pieces, and the overall structure is like a dumbbell. In particular, the second axle pin is convenient for disassembly and assembly of the side expansion piece.

[0066] Example 2

[0067] In the portable expansion device for cervical surgery provided in this embodiment, a protrusion for moving the positioning sleeve up and down and thus changing the position of the side expansion piece is provided in the middle of the outer side of the connecting ring 03-1 of the positioning sleeve 03. The rest is the same as in the first embodiment.

[0068] Example 3

[0069] In the portable expansion device for cervical surgery provided in this embodiment, the middle part of the outer side of the connecting ring 03-1 of the positioning sleeve 03 is arranged in a groove shape, which is convenient for moving the positioning sleeve up and down to change the position of the side expansion piece, and the groove shape can also facilitate the placement of the smoke exhaust pipe. The groove shape can be arranged up and down at the same time. The rest is the same as in embodiment 1.

[0070] Example 4

[0071] like Figure 7-10 As shown, the portable expansion device for cervical surgery provided by this embodiment has a self-destruct strip 09-16 formed integrally on the positioning seat 09-12, and one of the self-destruct strip 09-16 and the fixing piece is an elastic piece. The positioning seat 09-12 is more firmly fixed in the handle side hole 02-8 and the inclined pad 02-9 through the front and rear tension of the self-destruct strip 09-16 and the fixing piece, and the expansion positioning function for fixing the upper wing 01-1 and the lower wing 02-1 in the open state and the shape-destructing function that can be destroyed after use are completely and cleverly combined. The rest is the same as any one of embodiments 1-3.

[0072] The self-destruct strip 09-16 is a relatively short and small strip that is slightly tilted forward. The front is close to the front wall of the handle side hole 02-8, and the back is a fixing part. The end of the fixing part is a push handle 09-18. Figure 7 In the state shown, push the push handle 09-18, the self-destruct strip 09-16 is subjected to the force of the push handle 09-18 and the fixing member, and its belly is squeezed by the front wall of the hole 02-8 beside the handle, so that the root is immediately "broken". Fig.11As shown, the impact force when the fixing member slips off the positioning seat 09-12 due to the lever action of the positioning seat 09-12 and the inclined pad 02-9 causes the self-destruct strip 09-16 to "fracture" the root immediately, so the "fracture" of the self-destruct strip 09-16 is almost simultaneous with the slipping of the positioning seat 09-12 from the handle side hole 02-8 and the inclined pad 02-9. Due to the slipping of the positioning seat 09-12, the fixing member is out of position, and the fixing member cannot achieve the expansion and positioning functions. All this happens and is completed in an instant, and the broken parts of the self-destruct strip 09-16 are almost all at the root, which is similar to a "fracture". Therefore, even if the self-destruct strip 09-16 is broken, it is still connected to the positioning seat 09-12 and will not fall off alone; after the fixing member is out of position, it is still connected to the positioning seat 09-12 and will not fall off alone. Therefore, when the doctor takes it out, it is still an integral dilator, just like a disposable vaginal dilator without an immediate destruction device, so it is simple and labor-saving to operate, convenient and practical, safe and effective.

[0073] If the fixing is a screw fixing, such as Fig.17 As shown, the bottom of the screw 09-14 is provided with a screw front dome 09-13 for accommodating the self-destruct strip 09-16. The bending structure and position relationship between the screw and the self-destruct strip after the deformation are as shown in FIG. Fig.18 shown.

[0074] Example 5

[0075] In the portable expansion device for cervical surgery provided in this embodiment, the head end of the self-destruct strip 09-16 extends forward to form a crown 09-17, so that the self-destruct strip 09-16 with the crown 09-17 is shaped like a "7" horizontally, and accordingly, it just fits with the convex protrusion 02-7 in front of the handle side hole 02-8 located in the middle of the side of the handle 02-2. The self-destruct strip 09-16 with the crown 09-17 design is more likely to break and self-destruct when squeezed by the front wall of the handle side hole 02-8, and when the self-destruct strip 09-16 with the crown 09-17 is squeezed and broken, the "fracture" is still at the root, so the operation is also time-saving and labor-saving, simple and convenient, safe and effective. The rest is the same as in Example 4.

[0076] Example 6

[0077] like Figure 6 or Fig.19 As shown, the portable expansion device for cervical surgery provided in this embodiment is also connected to a smoker 08, which is connected to a smoke exhaust pipe clamped on the upper expansion piece 01, the lower expansion piece 02 or the side expansion piece 04, and a filter element is provided on the smoke exhaust pipe. In this embodiment, the filter element is an activated carbon adsorption tube 06. Specifically, the smoker 08 can be connected to the rear smoke exhaust pipe 07, the activated carbon adsorption tube 06 and the front smoke exhaust pipe 05 in sequence. The rest is the same as any one of embodiments 1-5.

[0078] Example 7

[0079] The portable expansion device for cervical surgery provided in this embodiment has two side expansion pieces 04, such as Figure 5 In this embodiment, by setting the positioning buckles on the left and right edges of the positioning sleeve, the maximum inner diameter spacing of the left and right expansion sheets can reach >88mm (30mm more than the prior art), which is of great clinical value and can effectively increase the surgical space. It is safe, effective and practical, and plays a fundamental role in improvement and progress. The rest is the same as any one of Embodiments 1-6.

[0080] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A portable expansion device for cervical surgery, comprising an upper expansion piece, a lower expansion piece, at least one side expansion piece and a positioning sleeve, wherein the upper expansion piece and the lower expansion piece are rotatably connected and positioned by an expansion fixing mechanism, the positioning sleeve is rotatably connected to the upper expansion piece, and the side expansion piece is rotatably connected to the positioning sleeve, characterized in that: The side expansion piece includes a side wing, a positioning hook and a shaft sleeve arranged on the side wing, the positioning sleeve includes a connecting ring nested on the upper expansion piece, the end of the connecting ring is provided with a positioning buckle corresponding to the positioning hook and a second shaft pin matched with the shaft sleeve, the shaft sleeve is an open shaft sleeve, the positioning hook is also provided with a wrench matched with the handle at the end of the side wing, and the expansion fixing mechanism is a spiral fixing mechanism; The spiral fixing mechanism includes a positioning seat and a spiral fixing part integrally formed on the positioning seat, the positioning seat is connected to the handle side hole of the lower expansion piece through an inclined pad, the upper expansion piece is provided with a handle hole for passing through and fixing the position of the spiral fixing part, the spiral fixing part includes a screw rod and a nut, the screw rod extends upward from the positioning seat, passes through the handle side hole and the handle hole in sequence, and is connected to the nut, and the expansion angle between the upper expansion piece and the lower expansion piece is fixed by adjusting the different positions of the nut on the screw rod.

2. The portable dilation device for cervical surgery according to claim 1, characterized in that: One end of the positioning hook is fixedly connected to the side wing, and the other end is a free end, and the wrench is arranged on the free end.

3. The portable dilation device for cervical surgery according to claim 1, characterized in that: The inner side surface of the end of the connecting ring is provided with a third axle pin for connecting with the upper expansion piece, the positioning buckle is arranged on the outer side surface of the end of the connecting ring, and the second axle pin is vertically installed on the positioning buckle.

4. The portable dilation device for cervical surgery according to claim 1, characterized in that: The positioning buckle is formed by the end of the connecting ring extending vertically outward, so that the positioning buckle is formed on the left and right edges of the positioning sleeve.

5. The portable dilation device for cervical surgery according to claim 1, characterized in that: A toggle piece for toggling the position of the positioning sleeve is provided in the middle of the connecting ring.

6. The portable dilation device for cervical surgery according to claim 1, characterized in that: A self-destruct strip is also integrally formed on the positioning seat, and one of the self-destruct strip and the fixing piece is an elastic piece. The positioning seat is fixed in the side hole of the handle and the inclined pad through the front and rear tension of the self-destruct strip and the fixing piece.

7. The portable dilation device for cervical surgery according to claim 6, characterized in that: The end of the self-destruct strip is provided with a self-destruct strip head crown, and the self-destruct strip head crown is overlapped with the side wall of the side hole of the handle.

8. The portable dilation device for cervical surgery according to claim 1, characterized in that: The expansion device is also connected to a smoker, and the smoker is connected to a smoke exhaust pipe clamped on the upper expansion piece, the lower expansion piece or the side expansion piece.

9. The portable dilation device for cervical surgery according to claim 8, characterized in that: The smoke exhaust pipe is provided with a filter element.

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