A contraceptive device holder

Abstract

The present application relates to the technical field of intrauterine fixation devices for contraceptive devices, and particularly relates to a contraceptive device fixing device, which mainly comprises: a main body having a hollow extension rod, the extension rod having a first axis; a transmission member arranged in the extension rod and capable of moving axially along the first axis; and a working part comprising: a working member arranged at one end of the extension rod away from the main body, the working member being formed with a mounting cavity and a push needle channel, the push needle channel being in communication with the mounting cavity, the depth direction of the push needle channel being perpendicular to the first axis, and the push needle channel storing a fixing nail; and a nail setting mechanism comprising: a force applying part slidably arranged in the mounting cavity and capable of sliding in the depth direction of the mounting cavity; and a force receiving part arranged in the mounting cavity and the push needle channel, when the transmission member moves along the first axis, the force applying part is pushed to slide in the depth direction of the mounting cavity to abut against the force receiving part, so that the force receiving part moves linearly in the push needle channel to push the fixing nail out of the push needle channel.

Description

Technical Field

[0001] This invention relates to the field of intrauterine fixation devices for assisted reproductive technologies, and more particularly to a device for fixing an intrauterine device. Background Technology

[0002] The levonorgestrel intrauterine sustained-release system, also known as an intrauterine device (IUD), is commonly used in clinical practice for women seeking temporary contraception or for patients with gynecological conditions causing menstrual irregularities who require IUD placement for treatment.

[0003] Currently, intrauterine devices (IUDs) are shaped like a "T" or "Y" and are usually made of flexible plastic. After being placed in the patient's uterine cavity, they are easily affected by various factors, which can lead to displacement or dislodgement. For example, if the patient wearing an IUD has a large uterine cavity, heavy menstrual flow, high activity level, or an irregular uterine cavity shape (such as a uterine septum, bicornuate uterus, saddle-shaped uterus, or uterine fibroids), it will affect the stability of the IUD in the uterine cavity, making it unable to function effectively, resulting in contraceptive failure or ineffective treatment.

[0004] Therefore, in clinical practice, after the IUD is inserted into the patient's uterine cavity, it is usually fixed by suturing, or by setting a structure on the IUD to insert into the skin, or by binding the IUD and a fixed ring together and inserting them into the uterine cavity (equivalent to placing two IUDs in the patient at the same time), so that the IUD is always in the ideal position in the uterine cavity.

[0005] However, due to the relatively small space inside the uterine cavity, when using the above methods to fix the IUD, especially by suturing, the limited surgical space greatly affects the flexibility of the suturing work, leading to increased suturing difficulty and prolonged operation time. At the same time, it also increases the incidence of complications of hysteroscopic surgery such as water intoxication, uterine perforation, and infection. Summary of the Invention

[0006] To address the aforementioned issues, this application discloses an IUD fixing device that can fix the IUD within the limited space of the uterine cavity, preventing the IUD from changing position or falling out of the uterine cavity.

[0007] To achieve the above objectives, this application adopts the following technical solution, which includes:

[0008] The main body has a hollow extension rod, the extension rod having a first axis;

[0009] A transmission component is disposed within the extension rod and is capable of axial movement along the first axis;

[0010] The working part includes: a working component disposed at the end of the extension rod away from the main body, wherein the working component forms an installation cavity and a push needle channel, the push needle channel is connected to the installation cavity, and the depth extension direction of the push needle channel is perpendicular to the first axis, wherein a fixing pin is stored in the push needle channel;

[0011] The pin-setting mechanism includes: a force-applying part slidably disposed within the mounting cavity and capable of sliding along the depth direction of the mounting cavity; and

[0012] A force-receiving part is disposed within the mounting cavity and the push needle channel. When the transmission member moves along the first axis, it can push the force-applying part to slide in the depth direction of the mounting cavity to abut against the force-receiving part, so that the force-receiving part moves linearly in the push needle channel to push the fixing pin out of the push needle channel.

[0013] In one illustrative embodiment of a contraceptive device fixing device, the force-applying part includes: a force-applying rod, and an abutment surface is formed at one end of the force-applying rod near the force-receiving part;

[0014] The force-receiving part includes: a force-receiving component, the force-receiving component having a contact surface;

[0015] A first return spring is disposed inside the mounting cavity around the outer side of the force-receiving member and located between the contact surface and the inner surface of the mounting cavity in the depth direction of the push needle channel. The first return spring provides a thrust to the force-receiving part so that the contact surface always slides against the abutment surface.

[0016] In one illustrative embodiment of a contraceptive device fixing device, the force-bearing component includes a force-bearing block and a pusher plate, the force-bearing block being located at one end of the pusher plate, and the end of the pusher plate facing away from the force-bearing block extending into the pusher needle channel.

[0017] In one illustrative embodiment of a contraceptive device fixing device, the contact surface is an arc-shaped surface.

[0018] In one illustrative embodiment of an IUD fixing device, the working member is rotatable relative to the extension rod in a direction perpendicular to the first axis.

[0019] The transmission component includes a transmission rod and a bending rod connected in sequence, wherein the end of the bending rod away from the transmission rod is fixedly connected to the force-applying part, and is capable of bending deformation when the working part rotates relative to the extension rod.

[0020] In one illustrative embodiment of an IUD fixing device, the bending rod includes: a flexible inner core and a spring disposed around the outer wall of the flexible inner core, the two ends of the flexible inner core being fixedly connected to the force-applying rod and the transmission rod respectively, and the two ends of the spring being fixedly connected to the force-applying rod and the transmission rod respectively.

[0021] In one illustrative embodiment of an IUD fixation device, the IUD fixation device further includes:

[0022] Two racks, both of which are slidably connected to the extension rod;

[0023] A first rotating component and a second rotating component, both of which are semi-circular gears, wherein the first rotating component is rotatably connected to the inner surface of the extension rod, and the second rotating component is fixedly connected to the inner surface of the mounting cavity, wherein the first rotating component and the second rotating component mesh with each other;

[0024] Two connecting rods connect the two racks to the first rotating member, and both connecting rods are rotatably connected to the first rotating member.

[0025] A knob is rotatably connected to the outer surface of the extension rod, and when rotated, it drives one rack to move toward the working part and the other rack to move away from the working part, so as to drive the first rotating part to rotate through the two connecting rods, causing the working part to rotate relative to the extension rod.

[0026] In one illustrative embodiment of an IUD fixing device, each of the two connecting rods includes a horizontal segment and a vertical segment connected in sequence, the direction of the horizontal segment being parallel to the direction of the first axis, and the direction of the vertical segment being perpendicular to the direction of the horizontal segment;

[0027] The first rotating component has two connecting holes, wherein the vertical sections of the two connecting rods extend into the corresponding connecting holes, and the horizontal sections of the two connecting rods are slidably connected to the two racks.

[0028] In one illustrative embodiment of an IUD fixing device, the IUD fixing device further includes a drive handle, which is rotatably connected to the main body, wherein the drive handle is capable of driving the transmission rod to move axially along the first axis when rotated.

[0029] The following description, in a clear and easy-to-understand manner and with reference to the accompanying drawings, will further illustrate the above-mentioned characteristics, technical features, advantages, and implementation methods of an IUD fixation device. Attached Figure Description

[0030] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0031] Figure 1 This is a schematic diagram illustrating one embodiment of a contraceptive device fixing device.

[0032] Figure 2 A cross-sectional view of the IUD fixation device in the AA direction.

[0033] Figure 3 A schematic diagram illustrating the internal structure of the workpiece.

[0034] Figure 4 This is a schematic diagram illustrating the structure of the fixing pin being pushed outside the push needle path.

[0035] Figure 5 This is a schematic diagram illustrating the structure of the workpiece after it rotates relative to the extension rod.

[0036] Figure 6 This is a schematic diagram illustrating the structure of the transmission rod.

[0037] Figure 7 This is a schematic diagram illustrating the structure of a bent rod.

[0038] Figure 8 This is a schematic diagram illustrating the structure of a bent rod after it has bent.

[0039] Figure 9 A schematic diagram illustrating one possible implementation of the drive handle.

[0040] Figure 10 A schematic diagram illustrating the fit between a gear and a rack.

[0041] Figure 11 This diagram illustrates the connection between the first rotating component and the transmission rod.

[0042] Label Explanation

[0043] 1. Main body; 11. Extension rod; 12. Drive handle; 121. Finger; 122. Sector tooth; 13. Rack; 14. First rotating component; 15. Second rotating component; 16. Connecting rod; 17. Gear; 18. Knob; 2. Transmission component; 21. Transmission rod; 22. Bending rod; 221. Flexible inner core; 222. Spring; 23. Second return spring; 3. Working part; 31. Working component; 311. Mounting cavity; 312. Push needle path; 313. Pin cartridge; 314. Fixing pin; 32. Force application part; 321. Force application rod; 322. Abutment surface; 33. Force receiving part; 331. Force receiving component; 3311. Contact surface; 3312. Force receiving block; 3313. Push plate; 332. First return spring. Detailed Implementation

[0044] To provide a clearer understanding of the technical features, objectives, and effects of this application, specific embodiments of this application are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.

[0045] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0046] To keep the drawings concise, only the parts relevant to this application are shown schematically in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is labeled.

[0047] To facilitate understanding of the proposed solution, the shape and structure of the IUD are described below. Existing IUDs are usually of an approximate "T" or "Y" shape (such as the Mirena IUD), which includes two horizontal arms and one vertical arm. When fixing the IUD, the vertical arm is mainly fixed, or the horizontal and vertical arms are fixed simultaneously, thereby preventing displacement of the IUD within the patient's uterine cavity.

[0048] Combination Figure 1 , Figure 2 and Figure 3 The contraceptive device fixing device includes: a main body 1, a transmission component 2, and a working part 3; the main body 1 has an internal receiving chamber, and an extension rod 11 is provided on one side of the main body 1. The extension rod 11 is hollow and communicates with the receiving chamber, wherein the axis of the extension rod 11 is defined as a first axis.

[0049] The transmission component 2 is slidably disposed inside the extension rod 11 and partially extends into the receiving chamber. In actual operation, the transmission component 2 can be driven to move axially in the direction of the first axis, that is, to move linearly inside the extension rod 11.

[0050] The working part 3 includes a working component 31 and a pin placement mechanism. The working component 31 is rotatably connected to the end of the extension rod 11 away from the main body 1. The working component 31 forms an installation cavity 311, a push needle channel 312, and a pin cartridge 313. The push needle channel 312 is connected to the installation cavity 311, and the depth direction of the push needle channel 312 is perpendicular to the first axis. As will be understood by those skilled in the art, during use, the patient is in the lithotomy position, the surgeon holds the main body 1, inserts the working component 31 into the uterus through the patient's vagina, and aligns the port of the push needle channel 312 with the connection between the longitudinal and transverse arms of the IUD.

[0051] Combination Figure 3 , Figure 4 The staple cartridge 313 is located on one side of the push needle channel 312 in the direction of the first axis and is connected to the push needle channel 312. The staple cartridge 313 stores several fixing staples 314 and can push a fixing staple 314 into the push needle channel 312 and place the fixing staple 314 in the push needle channel 312. As shown in the figure, the staple cartridge 313 is located below the mounting cavity 311.

[0052] The pin-setting mechanism includes a force-applying part 32 and a force-receiving part 33. The force-applying part 32 is disposed in the mounting cavity 311 and can slide relative to the working part 31 in the depth direction of the mounting cavity 311. The force-applying part 32 is fixedly connected to one end of the transmission part 2.

[0053] The force-receiving part 33 is located in the installation cavity 311 and the push needle channel 312. When the transmission member 2 moves along the first axis, the force-applying part 32 slides in the depth direction of the installation cavity 311 to abut against the force-receiving part 33. At this time, under the constraint of the push needle channel 312, the force-receiving part 33 moves linearly in the push needle channel 312 to push the fixing pin 314 out of the push needle channel 312. During the pushing process, the fixing pin 314 gradually pierces into the patient's uterine cavity wall and presses the connection between the longitudinal arm and the transverse arm of the contraceptive device, thereby constraining the contraceptive device to prevent the position of the contraceptive device in the uterine cavity from changing.

[0054] Combination Figure 3 , Figure 4 and Figure 7 The force-applying part 32 is a force-applying rod 321, and an inclined abutment surface 322 is formed at the end of the force-applying rod 321 near the force-receiving part 33.

[0055] The force-receiving part 33 includes a force-receiving member 331 and a first return spring 332. The force-receiving member 331 is partially inserted into the push needle channel 312, wherein the force-receiving member 331 has a contact surface 3311; the first return spring 332 is disposed around the outside of the force-receiving member 331 in the mounting cavity 311, and is located between the contact surface 3311 and the inner surface of the mounting cavity 311 in the depth direction of the push needle channel 312, wherein one end of the first return spring 332 abuts against the mounting cavity. The inner wall of cavity 311 is connected to the outer side of force-receiving member 331 at the other end, thereby providing a thrust to force-receiving member 331, so that contact surface 3311 and abutting surface 322 always maintain sliding contact. Thus, when force-applying rod 321 slides relative to working member 31, contact surface 3311 slides on abutting surface 322, and under the constraint of push needle channel 312, force-receiving member 331 slides along push needle channel until the fixing pin 314 in push needle channel 312 is pushed out.

[0056] Combination Figure 3 , Figure 4 As can be seen, in the length direction perpendicular to the force-applying rod 321, the abutment surface 322 has a first abutment point and a second abutment point. The distance between the first abutment point and the transmission member 2 is greater than the distance between the second abutment point and the transmission member 2. Under the action of the first return spring 332, the force-receiving member 331 is always in contact with the first abutment point. When the force-applying rod 321 slides relative to the working member 31, the contact surface 3311 of the force-receiving member 331 slides from the first abutment point to the second abutment point. As those skilled in the art can understand, during this process, the force-receiving member 331 continuously extends into the push needle channel 312. When the force-receiving member 331 pushes the fixing nail 314 in the push needle channel 312, the first return spring 332 is gradually compressed. Thus, after pushing a fixing nail 314, when the force-applying rod 321 moves away from the force-receiving member 331, the first return spring 332 unfolds, so that the force-receiving member 331 returns to its original position.

[0057] Specifically, the force-bearing component 331 includes: an integrally formed force-bearing block 3312 and a pusher plate 3313. The force-bearing block 3312 is located at one end of the pusher plate 3313, and the end of the pusher plate 3313 facing away from the force-bearing block 3312 extends into the pusher needle channel 312, combined with... Figure 4 The contact surface 3311 is an arc-shaped surface. In this configuration, when the force bar 321 moves, the force-bearing component 331 can be evenly stressed through the arc-shaped contact surface 3311, which allows it to slide more stably within the push needle channel.

[0058] Combination Figure 3 , Figure 4Further explanation of the staple cartridge 313: the depth direction of the staple cartridge 313 is perpendicular to the depth direction of the push needle channel 312. The staple cartridge 313 is provided with a limiting rod, and a constraint space is formed between the limiting rod and the inner wall of the staple cartridge 313. Each fixing staple 314 is stored in the constraint space in sequence.

[0059] The outer wall of the limiting rod is provided with a push spring, which pushes each fixing pin 314 toward the push needle channel 312. Specifically, the width of the push needle channel 312 only allows one fixing pin 314 to enter. Under the action of the push spring, one fixing pin 314 is located in the push needle channel 312. Under the elastic force of the push spring, the fixing pin 314 located in the push needle channel 312 is in close contact with the inner wall of the push needle channel 312 and with the adjacent fixing pin 314, thereby restricting the fixing pin 314 within the push needle channel 312. When the force-bearing member 331 slides within the push needle channel 312, it can send the fixing pin 314 to the outside of the push needle channel 312 so that it can be driven into the uterine cavity.

[0060] Correspondingly, when the force-bearing component 331 is reset under the action of the first reset spring 332, the fixing pin 314 closest to the push needle channel 312 is pushed into the push needle channel 312 by the push spring. In this configuration, the fixing pin 314 can be quickly loaded into the push needle channel 312 so as to facilitate the pin placement operation again.

[0061] The fixing pin 314 consists of a first pin insertion section, a second pin insertion section, and a connecting section. The connecting section is located between the first pin insertion section and the second pin insertion section, and the first pin insertion section and the second pin insertion section are perpendicular to the connecting section. Specifically, the first pin insertion section, the second pin insertion section, and the connecting section are integrally formed. The ends of the first pin insertion section and the second pin insertion section away from the connecting section are sharp ends. In use, the first pin insertion section and the second pin insertion section are located on both sides of the longitudinal arm of the contraceptive device, and the sharp ends of the first pin insertion section and the second pin insertion section are pushed into the uterine cavity wall of the patient by the force-bearing member 331.

[0062] Combination Figure 5 —8. The working part 31 can rotate relative to the extension rod 11 in a direction perpendicular to the first axis, thereby fixing the two horizontal arms and one vertical arm of the IUD with pins, thereby enhancing the fixing effect of the IUD.

[0063] Combination Figure 6 , Figure 7 Specifically, the transmission component 2 includes a transmission rod 21 and a bending rod 22 connected in sequence. The end of the bending rod 22 away from the transmission rod 21 is fixedly connected to the force application part 32 and can be bent and deformed when the working component 31 rotates relative to the extension rod 11.

[0064] Combination Figure 7, Figure 8 The bending rod 22 includes a flexible inner core 221 and a spring 222 arranged around the outer wall of the flexible inner core 221. The two ends of the flexible inner core 221 are connected to the force-applying rod 321 and the transmission rod 21, respectively. The two ends of the spring 222 are welded to the force-applying rod 321 and the transmission rod 21, respectively. When the working part 31 rotates relative to the extension rod 11, the flexible inner core 221 and the spring 222 bend to allow the working part 31 to change its angle. At the same time, when the transmission rod 21 moves along the first axis, the bending rod 22 can still transmit the displacement of the transmission rod 21 to the force-applying rod 321, thereby driving the force-applying rod 321 to slide in the mounting cavity 311, thereby completing the nail placement operation.

[0065] Combination Figure 1 and Figure 9 To enable the transmission rod 21 to move along the first axis, the IUD fixing device further includes a drive handle 12, which is pivotally connected to the main body 1. The drive handle 12 extends into the receiving chamber, combining... Figure 9 Specifically, the drive handle 12 includes a finger 121 and a sector tooth 122, wherein one end of the finger 121 extends into the receiving cavity, and the sector tooth 122 is fixedly disposed at the end of the finger 121 that extends into the receiving cavity.

[0066] The transmission rod 21 has a groove extending from the end away from the bent rod 22 toward the bent rod 22. Several teeth are provided on the side of the groove corresponding to the drive handle 12, and the sector teeth 122 of the drive handle 12 mesh with the teeth. In use, by applying force to the finger 121, the finger 121 is rotated. For example, by rotating the finger 121 counterclockwise, the engagement between the sector teeth 122 and the teeth can drive the transmission rod 21 to move axially within the extension rod 11, thereby pushing the force application rod 321.

[0067] Combination Figure 9 More specifically, the transmission rod 21 also has a first baffle and a second baffle. The first baffle is located at the end of the transmission rod 21 away from the bent rod 22, and the second baffle is spaced apart from the first baffle along the length of the transmission rod 21. Referring to the figure, under normal conditions, the first baffle is in contact with the inner wall of the receiving chamber, thereby preventing the transmission rod 21 from moving too far away from the working part 31.

[0068] Preferably, a second return spring 23 is also provided around the outer wall of the transmission rod 21. One end of the second return spring 23 abuts against the second baffle, and the other end of the second return spring 23 abuts against the inner wall of the receiving chamber. In this configuration, the second return spring 23 always provides the transmission rod 21 with a thrust away from the working part 31, so that the first baffle is always in contact with the inner wall of the receiving chamber. In this configuration, the finger 121 can always be in a ready-to-use state. When performing the pin placement operation, the operator only needs to press the finger 121 to complete the operation, thereby improving the convenience of the operator when fixing the contraceptive device.

[0069] In actual use, the working part 31 is inserted into the uterus through the patient's vagina. First, the port of the push needle channel 312 is aligned with the longitudinal arm of the IUD. The operator applies force to the finger 121, causing the finger 121 to rotate counterclockwise relative to the main body 1. At this time, the transmission rod 21 moves axially towards the working part 31 under the action of the sector tooth 122, compressing the second return spring 23. The force-applying part 32 slides in the mounting cavity 311 under the push of the transmission rod 21, abutting against the force-receiving part 33, causing the force-receiving part 33 to move linearly within the push needle channel 312, and compressing the first return spring 332. The fixing pin 314 is pushed out from the push needle channel 312 and driven into the patient's uterine wall to restrain the longitudinal arm of the IUD. After this operation is completed, the force applied to the finger 121 is stopped. At this time, the first return spring 332 and the second return spring 23 unfold and provide thrust to the force-bearing component 331 and the transmission rod 21 respectively, so that they return to normal. Under the action of the push spring, the fixing pin 314 in the pin magazine 313 pushes another fixing pin 314 into the push needle channel 312. Under the push force of the push spring, the fixing pin 314 is always pressed against the inner wall of the push needle channel 312.

[0070] When fixing the two horizontal arms of the IUD, combine Figure 3 , Figure 4 , Figure 7 , Figure 8 First, the working part 31 is driven to rotate relative to the extension rod 11. The rotation angle of the working part 31 is such that the two sharp ends of the fixing nail 314 are respectively positioned on both sides of the horizontal arm of the contraceptive device, for example, between 45° and 75°. Of course, as can be understood by those skilled in the art, the rotation angle of the working part 31 can be increased or decreased according to the actual operation.

[0071] During this process, the flexible inner core 221 and the spring 222 surrounding the flexible inner core 221 bend synchronously to satisfy the change in the rotation angle of the working part 31. Then, force is applied to the finger 121 again, causing the finger 121 to rotate counterclockwise. The transmission rod 21 moves axially toward the working part 31 again. As those skilled in the art can understand, since the two ends of the spring 222 of the bending rod 22 are welded to the transmission rod 21 and the force-applying part respectively, even if the bending section bends, the axial movement of the transmission rod 21 can still be transmitted to the force-applying rod 321. The motion relationship between the force-applying part and the force-receiving part 331 is the same as above, and will not be described again here.

[0072] Combination Figure 10 , Figure 11 The following describes how the working component rotates at angle 31. The IUD fixing device also includes two racks 13, a first rotating component 14, a second rotating component 15, two connecting rods 16, a gear 17, and a knob 18. Both racks 13 are slidably connected to the extension rod 11, and are arranged in a mirror-symmetric manner about the first axis on the same horizontal plane. Specifically, the extension rod 11 has an installation end face, from which two sliding grooves are formed inside the extension rod 11. The two racks 13 are respectively positioned within their corresponding sliding grooves. More specifically, the sliding grooves are connected to the interior of the extension rod 11. The upper surface of the transmission rod 21 has an avoidance groove, thereby providing sliding space for the two racks 13 and preventing interference with their movement within the corresponding sliding grooves.

[0073] Combination Figure 11 Both the first rotating member 14 and the second rotating member 15 are semi-circular gears 17. The first rotating member 14 is pivotally connected to the inner surface of the extension rod 11, and the second rotating member 15 is fixedly connected to the inner surface of the mounting cavity 311. The first rotating member 14 and the second rotating member 15 mesh with each other. As those skilled in the art will understand, the first rotating member 14 can also be connected to the inner surface of the extension rod 11 by hinge, and the second rotating member 15 can be fixed to the inner surface of the mounting cavity 311 by bolts or other fasteners.

[0074] Combination Figure 11 Two connecting rods 16 connect the two racks 13 to the first rotating member 14 respectively. Both connecting rods 16 are rotatably connected to the first rotating member 14. Specifically, each connecting rod 16 includes a horizontal segment and a vertical segment connected in sequence. The direction of the horizontal segment is parallel to the direction of the first axis, and the direction of the vertical segment is perpendicular to the direction of the horizontal segment. The horizontal segments of the two connecting rods 16 are fixedly connected to the two racks 13 respectively, for example, by bonding or welding.

[0075] The first rotating member 14 has two connecting holes, in which the vertical sections of the two connecting rods 16 extend into the corresponding connecting holes to form a connection relationship, and the horizontal sections of the two connecting rods 16 are slidably connected to the two racks 13 respectively.

[0076] Specifically, the first rotating member 14 and the two connecting rods 16 are located inside the extension rod 11, above the transmission rod 21, and correspondingly within the clearance groove.

[0077] Combination Figure 10 , Figure 11 The gear 17 is rotated and mounted to the mounting end face, located between the two racks 13, and meshes with the two racks 13 respectively.

[0078] The knob 18 is rotatably connected to the mounting end face of the extension rod 11 and splinedly connected to the gear 17. When the knob 18 rotates, it drives the gear 17 to rotate synchronously, thereby driving one rack 13 to move towards the working part 31 and driving another rack 13 to move away from the working part 31. At this time, one connecting rod 16 moves towards the first rotating part 14 and the other connecting rod 16 moves away from the first rotating part 14, thereby causing the first rotating part 14 to rotate. Since the first rotating part 14 meshes with the second rotating part 15, when the first rotating part 14 rotates, it will drive the working part 31 to rotate relative to the extension rod 11, thereby changing the relative angle between the working part 31 and the extension rod 11, so as to realize that the nailing position of the fixing nail 314 corresponds to the horizontal arm of the contraceptive device.

[0079] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0080] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of this application and are not intended to limit the scope of protection of this application. All equivalent implementations or modifications made without departing from the spirit of the art of this application, such as combinations, divisions or repetitions of features, should be included within the scope of protection of this application.

Claims

1. A device for fixing an intrauterine device, characterized in that, It includes, The main body has a hollow extension rod, the extension rod having a first axis; A transmission component is disposed within the extension rod and is capable of axial movement along the first axis; The working part includes: a working component disposed at the end of the extension rod away from the main body, wherein the working component forms an installation cavity and a push needle channel, the push needle channel is connected to the installation cavity, and the depth extension direction of the push needle channel is perpendicular to the first axis, wherein a fixing pin is stored in the push needle channel; The pin-setting mechanism includes: a force-applying part slidably disposed within the mounting cavity and capable of sliding along the depth direction of the mounting cavity; and A force-receiving part is provided in the mounting cavity and the push needle channel, wherein when the transmission member moves along the first axis, it can push the force-applying part to slide in the depth direction of the mounting cavity to abut against the force-receiving part, so that the force-receiving part moves linearly in the push needle channel to push the fixing pin out of the push needle channel; The force-applying part includes: a force-applying rod, and a contact surface is formed at one end of the force-applying rod near the force-receiving part; The force-receiving part includes: a force-receiving component, the force-receiving component having a contact surface; A first return spring is disposed inside the mounting cavity around the outer side of the force-receiving member and located between the contact surface and the inner surface of the mounting cavity in the depth direction of the push needle channel. The first return spring provides a thrust to the force-receiving part so that the contact surface always slides against the abutment surface.

2. The IUD fixing device as described in claim 1, characterized in that, The force-bearing component includes a force-bearing block and a pusher plate. The force-bearing block is located at one end of the pusher plate, and the end of the pusher plate opposite to the force-bearing block extends into the pusher needle channel.

3. The IUD fixing device as described in claim 1, characterized in that, The contact surface is an arc-shaped surface.

4. The IUD fixing device as described in claim 1, characterized in that, The working part is capable of rotating relative to the extension rod in a direction perpendicular to the first axis; The transmission component includes a transmission rod and a bending rod connected in sequence, wherein the end of the bending rod away from the transmission rod is fixedly connected to the force-applying part, and is capable of bending deformation when the working part rotates relative to the extension rod.

5. The IUD fixing device as described in claim 4, characterized in that, The bending rod includes a flexible inner core and a spring arranged around the outer wall of the flexible inner core. The two ends of the flexible inner core are fixedly connected to the force-applying rod and the transmission rod, respectively, and the two ends of the spring are fixedly connected to the force-applying rod and the transmission rod, respectively.

6. The IUD fixing device as described in claim 5, characterized in that, The intrauterine device fixing device also includes: Two racks, both of which are slidably connected to the extension rod; A first rotating component and a second rotating component, both of which are semi-circular gears, wherein the first rotating component is rotatably connected to the inner surface of the extension rod, and the second rotating component is fixedly connected to the inner surface of the mounting cavity, wherein the first rotating component and the second rotating component mesh with each other; Two connecting rods connect the two racks to the first rotating member, and both connecting rods are rotatably connected to the first rotating member. A knob is rotatably connected to the outer surface of the extension rod, and when rotated, it drives one rack to move toward the working part and the other rack to move away from the working part, so as to drive the first rotating part to rotate through the two connecting rods, causing the working part to rotate relative to the extension rod.

7. The IUD fixing device as described in claim 6, characterized in that, Both connecting rods include a horizontal segment and a vertical segment connected in sequence. The direction of the horizontal segment is parallel to the direction of the first axis, and the direction of the vertical segment is perpendicular to the direction of the horizontal segment. The first rotating component has two connecting holes, wherein the vertical sections of the two connecting rods extend into the corresponding connecting holes, and the horizontal sections of the two connecting rods are slidably connected to the two racks.

8. The IUD fixing device as described in claim 4, characterized in that, A second return spring is also provided around the outer wall of the transmission rod, wherein the second return spring can provide a thrust to the transmission rod away from the working part.

9. The IUD fixing device as described in claim 4, characterized in that, The contraceptive device fixing device further includes a drive handle, which is rotatably connected to the main body. The drive handle is capable of driving the transmission rod to move axially along the first axis when rotated.

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