A ring drill tissue extraction device with scale adjustment and negative pressure suction function

Abstract

This invention provides a trephine tissue extraction device with adjustable scale and negative pressure suction function, belonging to the field of medical device technology. The device includes a handle, on which a trephine bit is fixedly mounted. A limiting component is installed on the trephine bit, including a limiting pad that slidably fits onto the trephine bit. The trephine bit has a scale, and the limiting pad has an automatic locking mechanism that locks or unlocks the limiting pad against the scale. An annular sealing gasket is fixedly installed on the lower surface of the limiting pad. In this design, the automatic locking mechanism on the limiting pad can cooperate with the scale to lock or unlock, precisely limiting the drilling depth. The annular sealing gasket on the lower surface of the limiting pad adheres to the skin, forming a closed sealing area with the suction area, improving negative pressure sealing. The suction hood on the trephine bit is connected to an external suction air source via a connecting tube. A first sensor collects negative pressure data inside the tube in real time, enabling precise depth visualization and adjustment. Combined with the linkage between sealing and negative pressure, the cutting accuracy is high.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a trephine tissue extraction device with adjustable scale and negative pressure suction function. Background Technology

[0002] Keloids are pathological scars formed by excessive proliferation of fibrous tissue after skin injury. They often appear as raised, hard, and tough lumps that extend beyond the original injury area. They commonly occur on the ears, chest, shoulders, and back, and are often accompanied by itching and pain. They not only affect appearance but may also restrict local movement. Clinically, minimally invasive methods such as trephine excision are often used for treatment. It is a common condition in plastic surgery and dermatological surgery.

[0003] Minimally invasive circumcision surgery requires high precision, stability, and safety. It necessitates precise control of the cutting depth to avoid damaging normal tissue and ensure complete removal of the lesion. At the same time, it is necessary to promptly remove exudate from the wound to maintain a clear surgical field. Operational deviations or insufficient instrument function may lead to poor surgical results, tissue damage, or poor healing.

[0004] Existing instruments cannot achieve precise and visual adjustment of cutting depth, lack a safety locking structure linked to negative pressure, and lack a sealing structure that fits the skin. This can easily lead to problems such as inaccurate depth control, blind cutting without negative pressure, and poor suction sealing, making it difficult to ensure surgical safety and precision. Summary of the Invention

[0005] This invention provides a trephine tissue extraction device with adjustable scale and negative pressure suction function to solve the technical problems of existing related instruments that cannot achieve visual and precise adjustment of cutting depth, lack a safety locking structure linked with negative pressure, and lack a sealing structure that fits the skin. These problems easily lead to inaccurate depth control, blind cutting without negative pressure, and poor suction sealing, making it difficult to ensure surgical safety and precision.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A trephine tissue extraction device with adjustable scale and negative pressure suction function includes a handle, a trephine bit fixedly mounted on the handle, a limiting component mounted on the trephine bit, the limiting component including a limiting pad, the limiting pad slidably sleeved on the trephine bit, the trephine bit having a scale, the limiting pad having an automatic locking mechanism, the automatic locking mechanism being able to lock or unlock the limiting pad with the scale, and an annular sealing gasket fixedly mounted on the lower surface of the limiting pad;

[0008] The piercing bit is equipped with a suction assembly, which includes a suction hood. The suction hood is installed on the piercing bit and is connected to an external suction air source through a connecting pipe. A first sensor is installed on the connecting pipe and communicates with the power source of the automatic locking mechanism.

[0009] Optionally, the automatic locking mechanism includes a miniature telescopic rod, a limit rod is fixedly installed on the output end of the miniature telescopic rod, and a limit hole is provided on the ring drill bit to cooperate with the limit rod.

[0010] Optionally, the suction assembly further includes a threaded groove formed on the ring drill bit, the suction cover is threadedly connected to the threaded groove, the suction cover is provided with a storage ring, and the ring drill bit is provided with a suction hole.

[0011] Optionally, the handle is provided with an auxiliary rotation component, which includes a rotating sleeve fitted on the handle. Both the rotating sleeve and the handle have annular grooves, and ball bearings are provided in the annular grooves.

[0012] Optionally, the rotating sleeve is provided with a support assembly, the support assembly including a pair of support rods fixedly installed on the rotating sleeve, a movable rod slidably installed inside the support rods, a first spring fixedly installed on the movable rod, the other end of the first spring being fixedly connected to the inner wall of the support rod, and a skin-contacting pad fixedly installed on the movable rod.

[0013] Optionally, the handle is provided with a first anti-slip groove, which is vertically oriented.

[0014] Optionally, the rotating sleeve is provided with a second anti-slip groove, which is arranged in a crisscross pattern.

[0015] Optionally, a set of second sensors is provided on the side of the limiting pad that contacts the skin. The second sensors are wirelessly connected to the air source control component and are used to control the suction force.

[0016] Optionally, the ring drill bit is provided with a movable groove, and the limiting pad is detachably installed with a limiting plate that cooperates with the movable groove. The limiting plate is inserted into the movable groove to prevent the limiting pad from rotating circumferentially.

[0017] Optionally, the limiting rod has a movable cavity, and one end of a second spring is fixedly installed in the movable cavity. The other end of the second spring is fixedly installed with a limiting bead that cooperates with the limiting hole to achieve pre-positioning. The beneficial effects of the above technical solution of the present invention are as follows:

[0018] In the above procedure, the doctor holds the handle and uses the trephine to perform a circumferential cutting operation on the scar tissue. The limiting pad is slid along the scale of the trephine to the target depth. The automatic locking mechanism on the limiting pad can lock or unlock in coordination with the scale, precisely limiting the drilling depth. The annular sealing pad on the lower surface of the limiting pad is attached to the skin, forming a closed sealing area with the suction area, improving the negative pressure sealing. The suction hood on the trephine is connected to an external suction air source via a connecting tube. The first sensor on the connecting tube collects the negative pressure data in the tube in real time and communicates and links with the miniature telescopic rod. When the negative pressure reaches the target, it is triggered to lock; when it does not reach the target, it remains unlocked, realizing precise adjustment of depth visualization. Combined with the linkage of sealing and negative pressure, it improves the safety of the surgery and the accuracy of cutting. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the trephine tissue extraction device with adjustable scale and negative pressure suction function of the present invention;

[0020] Figure 2 This is a schematic diagram of the trephine tissue extraction device with adjustable scale and negative pressure suction function of the present invention from another perspective.

[0021] Figure 3 This is a schematic diagram of the suction component of the trephine tissue extraction device with adjustable scale and negative pressure suction function of the present invention;

[0022] Figure 4 This is a schematic diagram of the limiting component of the trephine tissue extraction device with adjustable scale and negative pressure suction function of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the trephine drill bit of the trephine tissue extraction device with adjustable scale and negative pressure suction function of the present invention;

[0024] Figure 6 This is a schematic diagram of the suction hood of the trephine tissue extraction device with adjustable scale and negative pressure suction function of the present invention;

[0025] Figure 7 This is a schematic diagram of the annular sealing gasket of the trephine tissue extraction device with adjustable scale and negative pressure suction function of the present invention.

[0026] Figure 8 This is a schematic diagram showing the interaction between the limiting bead and the second spring in the trephine tissue extraction device with adjustable scale and negative pressure suction function of the present invention.

[0027] [Figure Labels]

[0028] 10. Handle; 11. Ring drill bit; 12. First anti-slip groove; 20. Suction assembly; 21. Suction hole; 22. Threaded groove; 23. Suction cover; 24. Storage ring; 25. Connecting tube; 26. First sensor; 30. Auxiliary rotation assembly; 31. Rotating sleeve; 32. Annular groove; 33. Ball bearing; 34. Second anti-slip groove; 40. Support assembly; 41. Support rod; 42. Movable rod; 43. First spring; 44. Fitting pad; 50. Limiting assembly; 51. Limiting pad; 52. Movable groove; 53. Limiting plate; 54. Limiting hole; 55. Miniature telescopic rod; 56. Limiting rod; 57. Second sensor; 58. Annular sealing gasket; 59. Movable cavity; 510. Limiting bead; 511. Second spring. Detailed Implementation

[0029] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 8 As shown, an embodiment of the present invention provides a trephine tissue extraction device with adjustable scale and negative pressure suction function, including a handle 10, a trephine bit 11 fixedly mounted on the handle 10, a limiting component 50 mounted on the trephine bit 11, the limiting component 50 including a limiting pad 51, the limiting pad 51 being slidably sleeved on the trephine bit 11, the trephine bit 11 having a scale, the limiting pad 51 having an automatic locking mechanism, the automatic locking mechanism being able to lock or unlock the limiting pad 51 from the scale, and an annular sealing gasket 58 fixedly mounted on the lower surface of the limiting pad 51.

[0031] A suction assembly 20 is installed on the piercing bit 11. The suction assembly 20 includes a suction hood 23. The suction hood 23 is installed on the piercing bit 11. The suction hood 23 is connected to an external suction air source through a connecting pipe 25. A first sensor 26 is installed on the connecting pipe 25. The first sensor 26 communicates with the miniature telescopic rod 55. The doctor holds the handle 10 and uses the trephine 11 to perform a circumferential cutting operation on the scar tissue. The limiting pad 51 is slid along the scale of the trephine 11 to the target depth. The automatic locking mechanism on the limiting pad 51 can lock or unlock in coordination with the scale to precisely limit the drilling depth. The annular sealing pad 58 on the lower surface of the limiting pad 51 is attached to the skin to form a closed sealing area with the suction area, improving the negative pressure sealing. The suction hood 23 on the trephine 11 is connected to an external suction air source via the connecting tube 25. The first sensor 26 on the connecting tube 25 collects the negative pressure data in the tube in real time and communicates and links with the micro telescopic rod 55. When the negative pressure reaches the target, it is triggered to lock; when it does not reach the target, it remains unlocked, realizing precise adjustment of depth visualization. Combined with the linkage of sealing and negative pressure, it improves the safety of the operation and the accuracy of cutting.

[0032] like Figure 4 and 5As shown, the automatic locking mechanism includes a miniature telescopic rod 55, with a limiting rod 56 fixedly installed on the output end of the miniature telescopic rod 55. A limiting hole 54 that mates with the limiting rod 56 is provided on the ring drill bit 11. The miniature telescopic rod 55 of the automatic locking mechanism receives a signal from the first sensor 26. When the negative pressure reaches the target, the telescopic rod extends, driving the end limiting rod 56 to engage with the limiting hole 54 on the ring drill bit 11, thereby achieving rigid locking of the limiting pad 51. When the negative pressure is insufficient or interrupted, the miniature telescopic rod 55 retracts, the limiting rod 56 exits the limiting hole 54, and the limiting pad 51 returns to a slidable state. Through electric rigid locking and unlocking, the limiting state is ensured to be stable, preventing intraoperative slippage of the limiting pad.

[0033] like Figure 3 As shown, the suction assembly 20 also includes a threaded groove 22 on the trephine bit 11. The suction cover 23 is threadedly connected to the threaded groove 22. A storage ring 24 is provided on the suction cover 23, and a suction hole 21 is provided on the trephine bit 11. The suction cover 23 is threadedly connected to the trephine bit 11 via the threaded groove 22, which is convenient to install and remove and provides a reliable seal. The storage ring 24 on the suction cover 23 can trap tissue debris to prevent blockage of the tubing. The suction hole 21 on the trephine bit 11 is aligned with the cutting area, and blood and tissue debris are sucked into the suction cover 23 under negative pressure and discharged through the connecting tube 25, thus creating a smooth and sealed suction passage, quickly removing debris from the surgical field and maintaining a clear operating view.

[0034] like Figures 1 to 3 As shown, an auxiliary rotation component 30 is provided on the handle 10. The auxiliary rotation component 30 includes a rotating sleeve 31 fitted onto the handle 10. Both the rotating sleeve 31 and the handle 10 have annular grooves 32, and ball bearings 33 are disposed in the annular grooves 32. The doctor holds the handle 10 with one hand to keep the device stable, and rotates the rotating sleeve 31 with the other hand. The ball bearings 33 in the annular groove 32 between the rotating sleeve 31 and the handle 10 roll with the rotation, changing the traditional sliding friction into rolling friction. This can significantly reduce rotational resistance, making the rotation of the trephine bit 11 easier and smoother, reducing the doctor's operating fatigue, avoiding rotational jamming, deviation, and slippage, ensuring a regular circumferential cutting trajectory, making the wound edge neat, and improving the quality of postoperative healing.

[0035] like Figures 1 to 3As shown, a support assembly 40 is provided on the rotating sleeve 31. The support assembly 40 includes a pair of support rods 41 fixedly installed on the rotating sleeve 31. A movable rod 42 is slidably installed inside the support rods 41. A first spring 43 is fixedly installed on the movable rod 42. The other end of the first spring 43 is fixedly connected to the inner wall of the support rod 41. An adhesive pad 44 that contacts the skin is fixedly installed on the movable rod 42. The rotating sleeve 31 drives the support rods 41 to be in place synchronously. After the adhesive pad 44 contacts the skin, the movable rod 42 is compressed and retracts into the support rod 41. The first spring 43 is compressed and generates a reverse elastic force, so that the adhesive pad 44 always adheres tightly to the skin surface, realizing adaptive skin curvature compensation. The double-sided support forms radial limit, offsetting the lateral force during circumcision, effectively preventing radial deviation, shaking, and slippage of the circumcision drill bit 11, and ensuring consistent drilling direction. The elastic support avoids hard pressure damage to the skin, improving operational stability and wound neatness.

[0036] like Figure 2 As shown, a first anti-slip groove 12 is provided on the handle 10, and the first anti-slip groove 12 is vertically oriented. When the doctor holds the handle 10, his fingers come into contact with the vertically oriented first anti-slip groove 12. The groove structure increases the roughness of the contact surface. The vertical anti-slip groove matches the direction of force applied during gripping, which increases the grip friction without hindering fine-tuning operations. This prevents the device from slipping due to sweaty hands or excessive force, ensuring stable gripping, precise operation, and reducing hand fatigue during prolonged operation.

[0037] like Figure 2 As shown, the rotating sleeve 31 has a second anti-slip groove 34, which is arranged in a crisscross pattern. When rotating the rotating sleeve 31, the hand comes into contact with the crisscrossing second anti-slip groove 34. The grooves simultaneously create anti-slip resistance in both the circumferential rotation direction and the axial gripping direction. The crisscross pattern achieves multi-directional anti-slip, taking into account both rotational torque transmission and axial positioning. The rotational force application is more stable, preventing slippage and misalignment, thus improving operational accuracy. The gaps between the textures are easy to clean, leaving no blood or tissue fluid residue, maintaining a full-process anti-slip effect.

[0038] like Figure 5 and 7As shown, a set of second sensors 57 is provided on the skin contact side of the limiting pad 51. The second sensors 57 are wirelessly connected to the air source control component to control the suction force. When the limiting pad 51 contacts the patient's skin surface, the second sensors 57 on the contact side of the limiting pad 51 collect the skin contact pressure, adhesion status, and wound exudation in real time, and wirelessly transmit the detection signals to the external negative pressure air source control component. The air source control component automatically adjusts the negative pressure suction force according to the signal feedback from the sensor, realizing adaptive changes in suction intensity. When there is a lot of bleeding from the wound and a large amount of tissue debris, the negative pressure is automatically increased to quickly remove dirt and keep the surgical field clear; when the cutting is close to the preset depth, the negative pressure is automatically reduced to avoid excessive traction and damage to normal subcutaneous tissue; when the limiting pad 51 is not stably attached to the skin, the negative pressure is reduced to prevent leakage and ensure suction efficiency; no manual adjustment of negative pressure by the doctor is required throughout the process, improving the convenience of operation and surgical safety.

[0039] In this embodiment, the ring drill bit 11 has a movable groove 52. A limiting plate 53 that mates with the movable groove 52 is detachably installed on the limiting pad 51. The limiting plate 53 is inserted into the movable groove 52 to prevent the limiting pad 51 from rotating circumferentially. The movable groove 52 on the ring drill bit 11 and the limiting plate 53 detachably installed on the limiting pad 51 restrict the circumferential rotation of the limiting pad 51, retaining only the axial sliding degree of freedom, preventing the limiting pad 51 from rotating and deviating, and ensuring the accuracy of scale alignment and positioning. A movable cavity 59 is formed in the limiting rod 56. One end of the second spring 511 is fixedly installed in the movable cavity 59, and the other end of the second spring 511 is fixedly installed with a limiting bead 510 that mates with the limiting hole 54 to achieve pre-positioning. The second spring 511 inside the active cavity 59 continuously pushes the limiting bead 510. When adjusting the limiting pad 51, the limiting bead 510 is engaged in the limiting hole 54 to form a mechanical pre-position, providing a damping feel and temporary fixation, achieving rapid pre-position, preventing adjustment slippage, and improving the adjustment feel and accuracy.

[0040] The working process of the trephine tissue extraction device with adjustable scale and negative pressure suction function in this embodiment:

[0041] Referring to the scale of the ring drill bit 11, the sliding limit pad 51, the limit bead 510 and the second spring 511 complete the pre-positioning, determine the cutting depth, connect the external negative pressure air source, and after the first sensor 26 detects that the negative pressure is up to standard, the micro telescopic rod 55 pushes the limit rod 56 into the limit hole 54 to complete the rigid locking; if the negative pressure is abnormal, it will automatically unlock. Hold the handle 10 and rotate the rotating sleeve 31. The ball bearing 33 reduces the resistance and drives the ring drill bit 11 to rotate smoothly. The fitting pad 44 of the support component 40 and the first spring 43 form an elastic support to prevent the device from shifting. The annular sealing pad 58 forms a sealing area against the skin. The suction hole 21 and the suction cover 23 remove blood and tissue debris under negative pressure. The storage ring 24 traps impurities to prevent blockage. When the negative pressure is disconnected, the limit automatically unlocks. Remove the suction cover 23 for cleaning and complete the surgery.

[0042] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A trephine tissue extraction device with adjustable scale and negative pressure suction function, characterized in that, The device includes a handle, on which a ring drill bit is fixedly mounted. A limiting component is mounted on the ring drill bit. The limiting component includes a limiting pad, which is slidably fitted onto the ring drill bit. The ring drill bit has a scale. The limiting pad has an automatic locking mechanism that can lock or unlock the limiting pad from the scale. An annular sealing gasket is fixedly mounted on the lower surface of the limiting pad. The piercing bit is equipped with a suction assembly, which includes a suction hood. The suction hood is installed on the piercing bit and is connected to an external suction air source through a connecting pipe. A first sensor is installed on the connecting pipe and communicates with the power source of the automatic locking mechanism.

2. The trephine tissue extraction device with adjustable scale and negative pressure suction function according to claim 1, characterized in that, The automatic locking mechanism includes a miniature telescopic rod, a limit rod is fixedly installed on the output end of the miniature telescopic rod, and a limit hole is opened on the ring drill bit to cooperate with the limit rod.

3. The trephine tissue extraction device with adjustable scale and negative pressure suction function according to claim 2, characterized in that, The suction assembly also includes a threaded groove formed on the ring drill bit, the suction cover is threadedly connected to the threaded groove, a storage ring is provided on the suction cover, and a suction hole is formed on the ring drill bit.

4. The trephine tissue extraction device with adjustable scale and negative pressure suction function according to claim 3, characterized in that, The handle is provided with an auxiliary rotation component, which includes a rotating sleeve fitted on the handle. Both the rotating sleeve and the handle have annular grooves, and ball bearings are provided in the annular grooves.

5. The trephine tissue extraction device with adjustable scale and negative pressure suction function according to claim 4, characterized in that, The rotating sleeve is provided with a support assembly, which includes a pair of support rods fixedly installed on the rotating sleeve. A movable rod is slidably installed inside the support rods. A first spring is fixedly installed on the movable rod. The other end of the first spring is fixedly connected to the inner wall of the support rod. A skin-contacting pad is fixedly installed on the movable rod.

6. The trephine tissue extraction device with adjustable scale and negative pressure suction function according to claim 5, characterized in that, The handle is provided with a first anti-slip groove, which is vertically oriented.

7. The trephine tissue extraction device with adjustable scale and negative pressure suction function according to claim 6, characterized in that, The rotating sleeve is provided with a second anti-slip groove, which is arranged in a crisscross pattern.

8. The trephine tissue extraction device with adjustable scale and negative pressure suction function according to claim 7, characterized in that, A second sensor is provided on the side of the limiting pad that contacts the skin. The second sensor is wirelessly connected to the air source control component and is used to control the suction force.

9. The trephine tissue extraction device with adjustable scale and negative pressure suction function according to claim 8, characterized in that, The ring drill bit has a movable groove, and the limiting pad is detachably installed with a limiting plate that mates with the movable groove. The limiting plate is inserted into the movable groove to prevent the limiting pad from rotating circumferentially.

10. The trephine tissue extraction device with adjustable scale and negative pressure suction function according to claim 9, characterized in that, The limiting rod has a movable cavity, and one end of a second spring is fixedly installed in the movable cavity. The other end of the second spring is fixedly installed with a limiting bead that cooperates with the limiting hole to achieve pre-positioning.

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