Single-trigger double-click marker pushing device
By designing a single-trigger double-click marker delivery device with two built-in markers, and using the linkage between the limiting handle and the trigger, the high cost and complex operation of existing devices are solved, achieving efficient and convenient marker release, reducing the difficulty of clinical operation and patient trauma.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JIECHENG MEDICAL TECH CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-07-17
AI Technical Summary
Existing breast tissue marker delivery devices are disposable and require multiple devices to place markers of different shapes, resulting in high costs, inconvenient clinical operation, and multiple traumas to patients. Furthermore, existing composite devices are complex to operate and require a long learning curve for doctors.
Design a single-trigger double-trigger marker pushing device with two built-in markers. The device releases two markers with a single puncture by linking a limiting handle and a firing device. The device is simple in structure, easy to operate, and reduces costs.
It achieves efficient release of two markers, reduces usage and stocking costs, simplifies clinical procedures, reduces patient trauma, conforms to ergonomic design, and is convenient and efficient to use.
Smart Images
Figure CN224505594U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical device technology and relates to a single-trigger double-click marker pushing device. Background Technology
[0002] Breast tissue markers are guiding devices used by surgeons during breast lesion surgery to remove lesions. They typically consist of a disposable pusher and a metal marker. The pusher carries the marker and serves to puncture, fix, and guide its insertion. Ultrasound-guided breast tissue marker placement is a preoperative procedure for breast diseases, which can locate occult breast lesions, ensuring a safer and faster surgery.
[0003] After breast biopsy or sampling, a breast tissue marker can be implanted at the sampling site for future follow-up. Currently, breast tissue markers are generally implanted using a pusher. During use, the breast tissue marker is placed inside the tip of the puncture needle of the pusher. After percutaneous puncture and reaching the designated location, the push button on the pusher is pressed, and the marker is pushed out via the push rod, leaving it in the designated position. The pusher is then removed.
[0004] Existing tissue marker delivery devices are typically disposable, with each device corresponding to a specific marker. A separate delivery device is needed for each marker, and multiple devices are required for multiple lesions with different shaped markers. This is not only costly but also inconvenient for clinical practice and causes multiple traumas to patients. Patent CN117338446A discloses a tissue marker delivery device that supports rapid replacement of various tissue markers. The markers are stored in an external connector, which needs to be connected to the delivery device during use. However, this product is complex to operate, requires a long learning curve for doctors, and is not convenient for practical clinical use.
[0005] To address this issue, a single-trigger double-click marker pushing device was designed to overcome the aforementioned problems. Summary of the Invention
[0006] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a single-trigger double-double-launch marker delivery device. This single-trigger double-launch marker delivery device pre-loads two tissue markers into a single delivery unit, enabling the release of both markers with a single puncture. The overall structure is simple and reasonable, easy to operate, convenient for clinical use, reduces usage or inventory costs, and provides a more convenient solution for surgical consumables.
[0007] This utility model is achieved through the following technical solution: a single-trigger double-click marker pushing device, comprising a device shell and an inner shell, wherein a firing device is installed inside the inner shell, and a partition is provided inside the inner shell, which divides the inner shell into two chambers, a first firing chamber at the front and a second firing chamber at the rear. A first firing device is installed in the first firing chamber, and a second firing device is installed in the second firing chamber. The first firing device and the second firing device form a linkage device through a guide frame installed in the first firing chamber and the second firing chamber, and both the first firing device and the second firing device are connected to the firing device to drive firing. A limit device is installed behind the first firing device and the second firing device to limit the firing and prevent accidental firing.
[0008] Preferably, the inner shell is composed of a left inner shell and a right inner shell. The right inner shell has a front cover at its front end and a rear cover at its rear. A puncture needle seat is arranged at the front end of the front cover, and a puncture needle is installed in front of the puncture needle seat. Both the front cover and the rear cover have slots. The left inner shell has a locking block, which is fixed by locking the locking block into the slot. After the left inner shell and the right inner shell are assembled, a certain gap is left above and below to accommodate the guide rail frame. A first firing device and a second firing device are installed inside the guide rail frame. The first firing chamber and the second firing chamber are located on the side wall of the right inner shell or the left inner shell, and a limiting protrusion is also provided so that the first firing device and the second firing device are installed in the guide rail frame behind the limiting protrusion.
[0009] Preferably, the guide rail frame consists of upper and lower side frames and a semi-circular limiting frame that protrudes to one side from the front and back. The upper side frame protrudes higher than the inner shell after installation, the lower side frame is flush with the inner shell, and the limiting frame is close to the middle of the right inner shell. When firing, it moves forward along the inner shell and stops moving after touching the locking block. The upper and lower side frames are also provided with mounting slots for installing the first and second firing devices. An installation port is provided on the upper side frame located on the side of the second firing device.
[0010] Preferably, the first firing device is installed in front of the guide rail frame and consists of a front ejector needle seat, a first push rod, and a first spring. The ejector needle seat is secured in the mounting groove by mounting feet and is embedded in the semi-circular limiting frame for fixation. The first push rod is installed through the front of the front ejector needle seat, with its front end inserted into the puncture needle and its rear end fitted onto the second firing device. A first spring seat is provided behind the front ejector needle seat, and the first spring is fitted onto the first spring seat. When not fired, the first spring and the first spring seat press against the partition block. A first firing rod inclined upward is also installed in front of the front ejector needle seat. A curved hook is provided in front of the first firing rod, and a first guide limiting rod is provided above the first firing rod. The first guide limiting rod is inserted into the firing device, and the curved hook presses against the limiting block provided on the outer shell. When fired, the curved hook is guided to the bottom of the limiting block, and the first guide limiting rod presses against the limiting block for limitation.
[0011] Preferably, the second firing mechanism is installed at the rear of the guide rail frame and consists of a second push rod, a rear ejector pin seat, and a second spring. The rear ejector pin seat is secured in the mounting groove by mounting feet and is embedded in the semi-circular limiting frame for fixation. The second push rod is inserted into the first push rod, and a second spring seat is provided at the rear. The second spring is sleeved on the second spring seat, and a through hole is provided at the rear of the second spring seat for installing the first limiting device. A second firing rod with an upward tilt and a bent head is also provided in front of the rear ejector pin seat. A second guide limiting rod is provided above the second firing rod and is also inserted into the firing mechanism to fire in conjunction with the first firing rod. The bent head of the second firing rod presses against the mounting opening on the guide rail frame. When firing, the bent head is guided to the bottom of the mounting opening, and the second guide limiting rod presses against the mounting opening for limiting.
[0012] Preferably, the first limiting device consists of a connecting rod and a limiting tail. The connecting rod passes through the through hole in the middle of the rear cover and is engaged and fixed with the second spring seat. A notch is provided below the limiting tail, and a stepped retaining seat is provided in the notch. A limiting handle is inserted into the notch. The limiting handle has a notch groove on the side facing the inner shell, and a limiting opening is provided on the notch groove. When not in use, the limiting handle is locked in the notch below the limiting tail. When firing is required, the limiting handle is pushed, and the connecting rod is locked into the notch groove to release the first limiting. When the limiting handle is pushed, the stepped retaining seat is inserted into the limiting opening to release the second limiting.
[0013] Preferably, the firing mechanism, mounted on the housing, comprises a firing rod and a second limiting device. The firing rod is embedded in a through-hole in the housing. Recesses are formed on both sides of the through-hole to serve as firing rails. A limiting strip is located at the rear of the firing mechanism, with a limiting block at its end. Multiple limiting holes are located behind the through-hole, connected by a trapezoidal transition edge. When pushed forward, the limiting block enters the front limiting hole through the transition edge. A second limiting device is located behind the limiting end to prevent accidental pushing. Fixing grooves are provided at the bottom of the firing mechanism to secure the first and second guide limiting rods. A raised pusher section with horizontal grooves is located at the top.
[0014] Preferably, the second limiting device is a limiting push-twist, with a limiting pull rod in front of the limiting push-twist. The limiting pull rod is inserted into the side grooves on both sides of the tail of the firing rod. The side grooves are provided with two arc-shaped grooves, and a trapezoidal transition connecting edge is provided between the two arc-shaped grooves. A fixing block is provided below the limiting push-twist, and the fixing block is located between the limiting blocks on both sides. When the limiting push-twist pushes the firing rod, there is no fixing block between the limiting blocks on both sides below, so it can move. When the limiting push-twist moves away from the firing rod, the fixing block is located between the limiting blocks on both sides, thus restricting the movement of the limiting blocks and playing a limiting and fixing role.
[0015] Preferably, the outer shell has a through hole at the rear for the limiting handle to pass through, the bottom of the outer shell has a cross-textured layer, and the front end is equipped with a protective sleeve at the puncture needle.
[0016] The beneficial effects of this utility model are as follows:
[0017] 1. This utility model features a limiting handle that passes through the outer shell (handle shell) and engages with a limiting lever. The limiting lever is fixedly connected to the rear ejector pin seat. The limiting handle has two strokes. Pushing it to the right for the first time unlocks the limiting lever, allowing for the first forward movement. Pushing it to the right for the second time unlocks the limiting lever again, allowing for the second forward movement. This segmented unlocking design ensures that the second marker is not released prematurely before the first marker is fully released, thus ensuring the device is convenient and efficient to use.
[0018] 2. The firing mechanism of this utility model has a textured layer on top as an anti-slip layer, and the contact surface with the fingers conforms to the ergonomic design, making it easier to push during use, and the overall design is beautiful and practical. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the exploded structure of this utility model.
[0020] Figure 2This is a cross-sectional view of the present invention.
[0021] Figure 3 This is a schematic diagram of the internal structure of this utility model.
[0022] Figure 4 This is a side view of the present invention (with the outer casing removed).
[0023] Figure 5 This is a top view of the firing mechanism in this utility model.
[0024] Figure 6 This is a bottom view of the firing mechanism in this utility model.
[0025] Figure 7 This is a perspective view of the firing mechanism in this utility model.
[0026] Figure 8 This is a schematic diagram of the bottom surface of the limiting tail in this utility model.
[0027] Figure 9 This is a schematic diagram of the limiting handle in this utility model.
[0028] Figure 10 This is a top view of the outer casing of this utility model.
[0029] Figure 11 This is a side view of the outer casing of this utility model.
[0030] Figure 12 This is a diagram showing the usage state of this utility model after installation (before firing).
[0031] Figure 13 This is a diagram showing the usage state of this utility model after installation (after full firing). Detailed Implementation
[0032] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.
[0033] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0034] The present invention will now be described in detail with reference to the accompanying drawings: Figure 1-3As shown, a single-trigger double-click marker pushing device includes a device housing 1 and an inner housing 2. A firing device is installed inside the inner housing 2. A partition 3 is provided inside the inner housing, dividing the inner housing into two chambers: a first firing chamber 4 at the front and a second firing chamber 5 at the rear. A first firing element 6 is installed in the first firing chamber 4, and a second firing element 7 is installed in the second firing chamber 4. The first firing element 6 and the second firing element 7 form a linkage device through a guide frame 8 installed in the first firing chamber 4 and the second firing chamber 5. Both the first firing element 6 and the second firing element 7 are connected to a firing element 30 to drive firing. A limit device is installed behind both the first firing element 6 and the second firing element 7 to limit the firing and prevent accidental firing.
[0035] The inner shell 2 is composed of a left inner shell 9 and a right inner shell 10. The front end of the right inner shell 9 is provided with a front cover 11 and the rear end is provided with a rear cover 12. The front end of the front cover 11 is provided with a puncture needle seat 13 and a puncture needle 14 is installed in front of the puncture needle seat 13. Both the front cover 11 and the rear cover 12 are provided with slots 14. The left inner shell 8 is provided with a locking block 15, which is fixed by locking into the slots 14. After the left inner shell 9 and the right inner shell 10 are assembled, a certain gap is left above and below to place the guide rail frame 8. The first firing device 6 and the second firing device 7 are installed inside the guide rail frame 8. The first firing chamber 6 and the second firing chamber 7 are located on the side wall of the right inner shell 10 or the left inner shell 9 and are provided with limiting protrusions 16 so that the first firing device 6 and the second firing device 7 are installed in the guide rail frame 8 behind the limiting protrusions 16.
[0036] The first push rod of this invention is fixedly connected to the rear end of the front push needle seat. The front end of the first push rod inserts into the puncture needle. During firing, the first push rod moves axially forward within the puncture needle, releasing the first marker located inside the front end of the puncture needle. The second push rod is fixedly connected to the rear push needle seat. The front end of the second push rod inserts into the first push rod. When the firing device is pushed forward, the second push rod moves axially forward within the first push rod, releasing the second marker located inside the front end of the first push rod. Each of the front and rear push needle seats has a spring (a first spring and a second spring). Before firing, both springs are compressed, providing a forward thrust during firing to push the inner needle assembly forward.
[0037] The guide rail frame 8 consists of upper and lower side borders and a semi-circular limiting frame 17 protruding to one side from the front and back. Figure 4As shown, the upper frame 18 protrudes higher than the inner shell 2 after installation, the lower frame 19 is flush with the inner shell 2, the limiting frame 17 is tightly attached to the middle of the right inner shell 10 to one side, and moves forward along the inner shell when firing, and stops moving after touching the locking block 15. The upper frame 18 and the lower frame 19 are also provided with mounting grooves 20, through which the first firing device 6 and the second firing device 7 are installed, and a mounting port 21 is provided at the upper frame 18 located on the side of the second firing device 6.
[0038] like Figure 5-6 As shown, the first firing device 6 is installed in front of the guide rail frame 8 and consists of a front ejector needle seat 22, a first and second push rod 3, and a first spring 24. The ejector needle seat is secured in the mounting groove 20 by mounting feet 26 and is fixedly embedded in the semi-circular limiting frame 17. The first and second push rods 3 are installed through the front of the front ejector needle seat 22. The front of the first and second push rods 3 is inserted into the puncture needle 14, and the rear is fitted onto the second firing device 7. A first spring seat 25 is provided behind the front ejector needle seat 22, and the first spring 24 is fitted onto the first spring seat 25. When not fired, the spring 24 and the first spring seat 25 press against the spacer 3. A first firing rod 27 inclined upward is also installed in front of the forward ejector needle seat 22. A curved top hook 28 is provided in front of the first firing rod 27. A first guide limit rod 29 is provided above the first firing rod 27. The first guide limit rod 29 is inserted into the firing device 30. The curved top hook 28 presses against the limit block 31 provided on the outer shell 1. When fired, the curved top hook 28 is guided to the bottom of the limit block 31, and the first guide limit rod 29 presses against the limit block 31 to limit it.
[0039] The second firing mechanism 7 is installed behind the guide rail frame 8 and consists of a second push rod 32, a rear ejector pin seat 33, and a second spring 34. The rear ejector pin seat 33 is secured in the mounting groove by mounting feet and is embedded in the semi-circular limiting frame. The second push rod 32 is inserted into the first and second push rods 3. A second spring seat 35 is provided behind the second push rod 32, and the second spring 34 is sleeved on the second spring seat 35. A through hole is provided behind the second spring seat 35 for installing the first limiting device. A second firing rod 36 with an upward tilt and a bent head is also provided in front of the rear ejector pin seat 33. A second guide limiting rod 37 is provided above the second firing rod 36. The second guide limiting rod 37 is also inserted into the firing mechanism 30 and is fired in conjunction with the first firing rod 27. The bent head of the second firing rod 36 presses against the mounting opening 21 on the guide rail frame 8. When fired, the bent head is guided to the bottom of the mounting opening 21, and the second guide limiting rod 37 presses against the mounting opening 21 for limiting.
[0040] like Figure 7-9As shown, the first limiting device consists of a connecting rod 39 and a limiting tail 40. The connecting rod 39 passes through the through hole in the middle of the rear cover 12 and is engaged and fixed with the second spring seat 35. A notch 41 is provided below the limiting tail 40, and a stepped retaining seat 42 is provided in the notch 41. A limiting handle 43 is inserted into the notch 41. A notch groove 44 is provided on the side of the limiting handle 43 facing the inner shell 2. A limiting opening 45 is provided on the notch groove 44. When not in use, the limiting handle 43 is engaged in the notch below the limiting tail 40. When firing is required, the limiting handle 43 is pushed, and the connecting rod 39 is engaged in the notch groove 44 to release the first limiting. When the limiting handle 43 is pushed, the stepped retaining seat 42 is inserted into the limiting opening 45 to release the second limiting.
[0041] To prevent accidental firing of the product before surgery, this invention features a limiting handle. The limiting handle passes through the outer casing (handle casing) and engages with a limiting lever. The limiting lever is fixedly connected to the rear ejector needle seat. The limiting handle has two strokes. Pushing it to the right for the first time unlocks the limiting lever, allowing for the first forward movement. Pushing it to the right a second time unlocks the limiting lever again, allowing for the second forward movement. This segmented unlocking mechanism ensures that the second marker will not be prematurely released before the first marker has been fully released.
[0042] The firing device 30 is mounted on the outer casing 1 and consists of a firing rod 46 and a second limiting device. The firing rod 46 is embedded in the outer casing through hole 47 on the outer casing 1. The outer casing through hole 47 has outer casing grooves 48 on both sides for use as firing rails. A limiting strip 49 is provided at the rear of the firing device 30. A limiting strip block 50 is provided at the end of the limiting strip 49. Multiple limiting holes 51 are provided behind the outer casing through hole 47. Two adjacent limiting holes 51 are connected by a trapezoidal transition edge 59. When pushed forward, the limiting strip block 50 enters the front limiting hole 51 through the transition edge. A second limiting device is provided behind the limiting tail 40 to limit the movement and prevent accidental pushing. The firing device 30 has fixing grooves at the bottom to fix the first guide limiting rod 29 and the second guide limiting rod 37. A protruding push part 52 is provided at the top. A horizontal textured layer 53 is provided on the push part 52.
[0043] like Figure 10-11As shown, the second limiting device is a limiting push knob 54. A limiting pull rod 55 is provided in front of the limiting push knob 54. The limiting pull rod 55 is inserted into the side grooves 56 on both sides of the tail of the firing lever 46. The side grooves 56 are provided with two arc-shaped grooves 57. A trapezoidal transition connecting edge is provided between the two arc-shaped grooves 57. A fixing block 58 is provided below the limiting push knob 54. The fixing block 58 is located between the two limiting strips 50 on opposite sides. When the limiting push knob 54 pushes the firing lever 46, there is no fixing block between the two limiting strips below, so it can move. When the limiting push knob 54 moves away from the firing lever 46, the fixing block is located between the two limiting strips 50 on both sides, thus restricting the movement of the limiting strips 50 and playing a limiting and fixing role.
[0044] A through hole is provided at the rear of the outer casing 1 for the limiting handle 43 to pass through. A cross-textured layer is provided at the bottom of the outer casing 1, and a protective sleeve 38 is also provided at the front end near the puncture needle 14. For ease of understanding, [details omitted]. Figure 12-13 The diagrams shown are of the present invention before and after assembly and firing.
[0045] The trigger of this invention has a textured layer on top as an anti-slip layer, and the contact surface with the fingers is ergonomically designed, making it easier to push during use.
[0046] The first marker is placed inside the tip tube of the puncture needle of the pusher, in front of the first push rod. The second marker is placed inside the tip tube of the first push rod, in front of the second push rod. The puncture needle and the first push rod are hollow tubes, while the second push rod is a solid rod. The puncture needle, the first push rod, and the second push rod are coaxially aligned, with the puncture needle located on the outermost layer and the second push rod on the innermost layer.
[0047] This invention features graduated markings on the puncture needle for marking and recording the insertion position during surgery. The puncture needle has a tip with different angulations at the front and rear edges to increase its sharpness and facilitate insertion into breast tissue. No other puncture tools are required during the procedure, allowing for direct puncture and simplifying the operation while reducing costs. A beveled opening at the rear of the guide needle facilitates insertion during assembly.
[0048] This invention features a stepped shaft at the front end of the right inner shell. This design facilitates its integration with a protective sleeve, which prevents both the needle tube and tip from being exposed. This protects the needle from damage during storage and transportation, and also prevents accidental injury to people or objects that come into contact with the needle before use. The left and right inner shells are assembled together, and their irregular tail ends are used for connection with the handle housing, restricting its rotational movement.
[0049] This utility model features a cylindrical handle shell design, which is conducive to the user's hand grip, providing a comfortable feel. Its compact size allows for one-handed operation during clinical use, while the other hand can be used for image-guided procedures. The handle shell can be molded from high-polymer plastic and then fitted onto the inner shell, or it can be overmolded onto the inner shell. The handle can also have regularly or irregularly arranged horizontal textured layers (anti-slip strips) to increase friction during puncture, preventing slippage and enhancing the grip for easier use.
[0050] The working process of this utility model is as follows:
[0051] During surgery, the surgeon determines the surgical approach and method based on the patient's overall condition.
[0052] 1. Prepare the required locating and marking sites as required, and administer sufficient anesthetic as needed;
[0053] 2. Remove the product packaging, take out the product with markings, and remove the protective sleeve;
[0054] 3. Use appropriate imaging technology to locate the target area;
[0055] 4. Insert the puncture needle into the breast tissue and guide it to the target area. Refer to the markings on the outer cannula of the puncture needle to position the needle tip so that it just touches the target.
[0056] 5. Push the limit lever to the right, then push the limit lever forward to the end, and finally push the trigger forward to release the first marker until you hear or feel a firm click and the button is locked in place;
[0057] 6. Locate and confirm the placement area for the second target, continue to push the limit switch to the right, then push the limit switch forward to the end, and finally continue to push the trigger forward to release the second marker until you hear or feel a firm click and the trigger is locked in place.
[0058] 7. After releasing the two markers, remove the pusher handle for harmless disposal.
[0059] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A single trigger, double shot marker propelling device comprising a device housing and an inner housing having a firing device mounted within the inner housing, characterized by: The inner shell is equipped with a partition block that divides the inner shell into two chambers: a first firing chamber at the front and a second firing chamber at the rear. A first firing device is installed in the first firing chamber, and a second firing device is installed in the second firing chamber. The first and second firing devices are linked together by guide rail frames installed in the first and second firing chambers. Both the first and second firing devices are connected to the firing device to drive the firing. Limiting devices are installed at the rear of both the first and second firing devices to limit the firing and prevent accidental firing.
2. The single-trigger double-click marker push device of claim 1, wherein: The inner shell is composed of a left inner shell and a right inner shell. The front end of the right inner shell is provided with a front cover and the rear end is provided with a rear cover. The front end of the front cover is provided with a puncture needle seat, and a puncture needle is installed in front of the puncture needle seat. Both the front cover and the rear cover are provided with slots. The left inner shell is provided with a locking block. The locking block is fixed by locking into the slot. After the left inner shell and the right inner shell are assembled, a certain gap is left above and below to place the guide rail frame. The first firing device and the second firing device are installed inside the guide rail frame. The first firing chamber and the second firing chamber are located on the side wall of the right inner shell or the left inner shell and are provided with limiting protrusions so that the first firing device and the second firing device are installed in the guide rail frame behind the limiting protrusions.
3. The single-trigger double-click marker push device of claim 2, wherein: The guide rail frame consists of upper and lower side frames and a semi-circular limiting frame that protrudes to one side from the front and back. The upper side frame protrudes higher than the inner shell after installation, while the lower side frame is flush with the inner shell. The limiting frame is pressed against the middle of the right inner shell to one side and moves forward along the inner shell during firing. It stops moving after touching the locking block. The upper and lower side frames are also provided with mounting slots for installing the first and second firing devices. An installation port is provided on the upper side frame located on the side of the second firing device.
4. The single-trigger double-click marker push device of claim 3, wherein: The first firing device is installed in front of the guide rail frame and consists of a forward ejector needle seat, a first push rod, and a first spring. The ejector needle seat is secured in the mounting groove by mounting feet and is embedded in the semi-circular limiting frame. The first push rod is installed through the front of the forward ejector needle seat, with its front end inserted into the puncture needle and its rear end fitted onto the second firing device. A first spring seat is provided behind the forward ejector needle seat, and the first spring is fitted onto the first spring seat. When not fired, the first spring and the first spring seat press against the partition block. A first firing rod inclined upward is also installed in front of the forward ejector needle seat. A curved hook is provided in front of the first firing rod, and a first guide limiting rod is provided above the first firing rod. The first guide limiting rod is inserted into the firing device, and the curved hook presses against a limiting block provided on the outer shell. When fired, the curved hook is guided to the bottom of the limiting block, and the first guide limiting rod presses against the limiting block to limit the firing device.
5. The single-trigger double-click fire marker propelling device of claim 4, wherein: The second firing mechanism is installed at the rear of the guide rail frame and consists of a second push rod, a rear ejector pin seat, and a second spring. The rear ejector pin seat is secured in the mounting groove by mounting feet and is embedded in the semi-circular limiting frame for fixation. The second push rod is inserted into the first push rod, and a second spring seat is provided at the rear. The second spring is sleeved on the second spring seat, and a through hole is provided at the rear of the second spring seat for installing the first limiting device. A second firing rod with an upward tilt and a bent head is also provided in front of the rear ejector pin seat. A second guide limiting rod is provided above the second firing rod. The second guide limiting rod is also inserted into the firing mechanism and is fired in conjunction with the first firing rod. The bent head of the second firing rod presses against the mounting opening on the guide rail frame. When firing, the bent head is guided to the bottom of the mounting opening, and the second guide limiting rod presses against the mounting opening for limiting.
6. The single-trigger double-click fire marker propelling device of claim 5, wherein: The first limiting device consists of a connecting rod and a limiting tail. The connecting rod passes through the through hole in the middle of the rear cover and is engaged and fixed with the second spring seat. A notch is provided below the limiting tail, and a stepped retaining seat is provided in the notch. A limiting handle is inserted into the notch. The limiting handle has a notch groove on the side facing the inner shell, and a limiting opening is provided on the notch groove. When not in use, the limiting handle is locked in the notch below the limiting tail. When firing is required, the limiting handle is pushed, and the connecting rod is locked into the notch groove to release the first limiting. When the limiting handle is pushed, the stepped retaining seat is inserted into the limiting opening to release the second limiting.
7. The single-trigger double-click fire marker propelling device of claim 6, wherein: The firing mechanism, mounted on the outer casing, consists of a firing rod and a second limiting device. The firing rod is embedded in a through hole in the outer casing. Grooves are provided on both sides of the through hole to serve as firing rails. A limiting strip is provided at the rear of the firing mechanism, with a limiting block at its end. Multiple limiting holes are provided behind the through hole, with adjacent holes connected by a trapezoidal transition edge. When pushed forward, the limiting block enters the front limiting hole through the transition edge. A second limiting device is provided behind the limiting end to prevent accidental pushing. Fixing grooves are provided below the firing mechanism to secure the first and second guide limiting rods. A raised pusher is provided above, with a textured layer on the pusher.
8. The single-trigger double-click fire marker push device of claim 7, wherein: The second limiting device is a limiting push-twist. A limiting pull rod is provided in front of the limiting push-twist. The limiting pull rod is inserted into the side grooves on both sides of the tail of the firing lever. The side grooves are provided with two arc-shaped grooves, and a trapezoidal transition connecting edge is provided between the two arc-shaped grooves. A fixing block is provided below the limiting push-twist. The fixing block is located between the limiting blocks on both sides. When the limiting push-twist pushes the firing lever, there is no fixing block between the limiting blocks on both sides below, so it can move. When the limiting push-twist pushes away from the firing lever, the fixing block is located between the limiting blocks on both sides, thus restricting the movement of the limiting blocks and playing a limiting and fixing role.
9. The single-trigger double-click fire marker propelling device of claim 7, wherein: The outer shell has a through hole at the rear for the limiting handle to pass through, the bottom of the outer shell has a horizontal textured layer, and the front end is equipped with a protective sleeve at the puncture needle.