A therapeutic device with controllable penetration depth
By combining the trigger mechanism and the depth adjustment mechanism, the precision and stability of the puncture are achieved, solving the problems of accuracy and depth control of traditional puncture devices, and making it suitable for minimally invasive interventional treatment of the body's natural cavities.
Patent Information
- Application Number
- CN202521081719.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-29
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-05-29
AI Technical Summary
Traditional puncture devices rely on manual external force from doctors for puncture, which reduces accuracy, stability and safety, and makes it difficult to precisely control the puncture depth. Traditional radiofrequency, plasma, microwave and laser treatment devices can only treat superficial areas in minimally invasive interventional procedures and cannot perform deep treatments.
It employs the synergistic action of a trigger mechanism and a depth adjustment mechanism, achieving precise puncture through a trigger button. It is suitable for minimally invasive interventional treatment of natural cavities in the human body, and the puncture depth can be controlled and adjusted by combining electromagnetic drive or mechanical transmission.
It improves the stability and safety of puncture, ensures the accuracy of puncture depth, is suitable for minimally invasive interventional treatment of natural body cavities, reduces operational difficulties, and improves the controllability and safety of puncture.
Smart Images
Figure CN224925213U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of interventional ablation therapy equipment, and specifically relates to a therapy device with controllable puncture depth. Background Technology
[0002] Currently, most puncture devices used in clinical practice are made of hard metal or polymer needles, which are long, thin, and straight with sharp points at the tip. First, these puncture devices are not suitable for current minimally invasive interventional surgeries; second, they can only be punctured manually by the doctor, which reduces accuracy, stability, and safety; and third, the puncture depth can only be calculated based on the scale or the length of the external part, which is not precise enough.
[0003] Traditional radiofrequency, plasma, microwave, and laser treatment devices typically involve inserting themselves into the body using hard metal or polymer materials, resulting in long, thin, and straight shapes, often requiring percutaneous puncture. While some minimally invasive interventional methods can access natural body cavities, they can only treat superficial wounds and cannot provide deep treatment, as shown below:
[0004] Radiofrequency ablation technology mainly relies on radiofrequency therapy devices with ablation and cutting functions, and its treatment mechanism is mainly thermal effect. When radiofrequency current flows through human tissue, the rapid change of electromagnetic field causes polarized water molecules in the tissue to move at high speed, generating heat (i.e., endogenous thermal effect), which causes the water inside and outside the cells to evaporate, dry, shrink and slough off, resulting in aseptic necrosis, thereby achieving the therapeutic purpose.
[0005] Plasma radiofrequency ablation is a method that uses a plasma beam generated by a plasma blade to remove the diseased tissue from the patient.
[0006] Microwave ablation technology refers to the process of inserting a microwave needle directly into the tumor site under local anesthesia under the guidance of ultrasound or CT. The polar molecules in the tissue move at high speed under the action of the microwave field, generating heat through mutual friction. When the temperature in the tumor rapidly rises to 120℃~150℃, the cancer cell proteins denature and die.
[0007] Ultrasound ablation surgery uses high-intensity focused ultrasound to raise the temperature inside the tumor to 65 to 100 degrees Celsius, treating various solid tumors.
[0008] Laser therapy uses a laser to generate heat at the tumor site. At 60°C, the laser can coagulate proteins, and at 100°C, it can vaporize the tissue. The tissue is usually charred within seconds, releasing smoke and leaving a hole and ulcer.
[0009] Traditional transurethral resection of the prostate (TURP) is an invasive surgical procedure that has been widely used since the 1920s. The most common method is electrocautery, but laser resection is also available. TURP is effective in addressing BPH symptoms, but for many patients, it can lead to other problems that significantly impact their quality of life, such as loss of sexual function.
[0010] However, traditional puncture devices rely on manual external force from doctors for puncture, which reduces accuracy, stability, and safety. The puncture depth can only be measured by observing the scale or length of the external part, which is not precise enough. Traditional radiofrequency, plasma, microwave, and laser treatment devices are mostly made of hard metal or polymer, and are long and straight in shape, and are mostly percutaneous puncture treatments. While some minimally invasive interventional methods can enter the body's natural cavities, they can only treat superficial areas and cannot perform deep treatments. The puncture and treatment depth of puncture devices and percutaneous puncture and interventional treatment devices can only be measured and intervened manually, which is not precise, is easily affected by human factors, and makes the operation difficult.
[0011] To address the shortcomings of the existing technologies, a treatment device with controllable puncture depth is provided. This device achieves precise puncture through the synergistic action of a trigger mechanism and a depth adjustment mechanism, making it suitable for minimally invasive interventional treatment of natural body cavities. Puncture is performed by triggering a button, which improves stability and safety. Utility Model Content
[0012] This invention proposes a treatment device with controllable puncture depth, which solves the problems in the prior art.
[0013] The technical solution of this utility model is implemented as follows: A treatment device with controllable puncture depth includes a puncture gun body and a puncture component. The puncture gun body has an installation cavity, a support block is fixedly installed in the installation cavity, a stop block is slidably installed in the installation cavity, a first elastic component is provided between the stop block and the support block, the puncture component is installed on the stop block, and its other end slidably extends out of the puncture gun body. The puncture gun body is equipped with a needle ejection button for controlling needle ejection. The device is characterized in that: the installation cavity is equipped with a trigger mechanism for controllably launching the puncture component; the needle ejection button controls the movement of the stop block through the trigger mechanism; and the installation cavity is equipped with a depth adjustment mechanism that cooperates with the stop block for adjusting the puncture depth of the puncture component.
[0014] In a preferred embodiment, the trigger mechanism includes a linkage mechanism rotatably mounted in the mounting cavity. A needle retraction trigger that slides out of the trigger mechanism is fixedly provided at the lower end of the stop block. A connecting rod is fixedly provided at one end of the needle retraction trigger. A first latch that cooperates with the linkage mechanism is provided on the connecting rod. A limit plate is slidably mounted in the mounting cavity. A second elastic component is provided between the limit plate and the needle eject button. A button transmission part that cooperates with the linkage mechanism is provided on the limit plate. A third elastic component is provided between the linkage mechanism and the mounting cavity.
[0015] In a preferred embodiment, the linkage mechanism includes an L-shaped transmission rod rotatably mounted in the mounting cavity. A pin is fixedly mounted on the mounting cavity. The L-shaped transmission rod has a pin hole rotatably mounted on the pin. The button transmission part has an equilateral triangular structure. One end of the L-shaped transmission rod is provided with a spherical part that mates with the inclined surface of the button transmission part, and the other end is provided with a second latch that mates with the first latch. The L-shaped transmission rod drives the baffle to compress the first elastic component through the second elastic component.
[0016] In a preferred embodiment, the trigger mechanism includes an electromagnet fixedly installed in the mounting cavity. A needle retraction trigger, which slides out of the trigger mechanism, is fixedly provided at the lower end of the stop block. A connecting rod is fixedly provided at one end of the needle retraction trigger. The connecting rod is L-shaped and has a magnetic material corresponding to the electromagnet. An electromagnet switch for controlling the opening and closing of the electromagnet is provided in the mounting cavity. A push rod corresponding to the electromagnet switch is provided on the needle dispensing button. The first elastic component drives the magnetic material away from the electromagnet through the connecting rod. The needle dispensing button activates the electromagnet through the cooperation of the push rod and the electromagnet switch, which drives the puncture component to move through the magnetic attraction between the electromagnet and the magnetic material.
[0017] In a preferred embodiment, the depth adjustment mechanism includes an adjustment body installed in the mounting cavity corresponding to the stop, and the piercing gun body is provided with an adjustment limiting device for moving and limiting the adjustment body.
[0018] In a preferred embodiment, the adjusting body is either a variable-diameter cylinder or a trapezoidal cylinder that is slidably installed in the mounting cavity. The adjusting limiting device includes a sliding cavity formed on the piercing gun body. A sliding frame that slides through the sliding cavity is fixedly installed on the adjusting body. A first straight rack is provided at the lower end of the sliding frame. A sawtooth-shaped turntable that meshes with the first straight rack is rotatably installed on the piercing cavity. The operation of the sawtooth-shaped turntable in conjunction with the first straight rack drives the adjusting body to move.
[0019] In a preferred embodiment, the adjusting body is a variable radius wheel that is rotatably installed in the mounting cavity. The adjusting limiting device includes a drive shaft that rotates on the puncture gun body. The drive shaft is coaxially and fixedly connected to the variable radius wheel. A rotating turntable is rotatably installed on the puncture cavity. The variable radius wheel is driven to rotate by operating the rotating turntable.
[0020] In a preferred embodiment, the depth adjustment mechanism employs a spring-loaded adjustment device. This device includes a sliding track with a wavy edge corresponding to the stop block, fixedly installed within the mounting cavity. A baffle corresponding to the stop block is slidably mounted on the sliding track. A locking switch, cooperating with the sliding track, is provided on the baffle. Operating the locking switch fixes the baffle to the sliding track.
[0021] The locking switch includes a limiting hole fixedly opened on the baffle. A positioning pin perpendicular to the sliding track is slidably installed in the limiting hole of the baffle. The positioning pin is connected to the baffle through a fourth elastic component. The positioning pin is provided with limiting teeth corresponding to the wavy edge on the sliding track.
[0022] In a preferred embodiment, the depth adjustment mechanism includes an adjustment rod that is slidably mounted in the mounting cavity. The portion of the stop block that contacts and limits the adjustment rod is provided with a limiting groove having an inclined surface. The distance between the adjustment rod and the inclined surface in the limiting groove can be adjusted by moving the adjustment rod up and down.
[0023] In a preferred embodiment, a connecting rod is fixedly provided on the stop block, and a second spur rack is provided at the lower end of the connecting rod. A needle advance knob is rotatably installed on the trigger mechanism, and a second transmission gear that meshes with the second spur rack is provided on the needle advance knob.
[0024] After adopting the above technical solution, the beneficial effects of this utility model are:
[0025] Precise puncture is achieved through the synergistic action of the trigger mechanism and the depth adjustment mechanism, making it suitable for minimally invasive interventional treatments in the body's natural cavities. Puncture is performed by triggering a button, which improves stability and safety. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of the structure of this utility model;
[0028] Figure 2 This is a schematic diagram of the trigger mechanism of this utility model;
[0029] Figure 3 This is a schematic diagram of the linkage mechanism of this utility model;
[0030] Figure 4 This is a schematic diagram of the trigger mechanism in Embodiment 2 of this utility model;
[0031] Figure 5 This is a schematic diagram of the trigger mechanism in Embodiment 3 of this utility model;
[0032] Figure 6 This is a schematic diagram of the depth adjustment mechanism in Embodiment 4 of this utility model;
[0033] Figure 7 This is a schematic diagram of the depth adjustment mechanism in Embodiment 4 of this utility model;
[0034] Figure 8 This is a schematic diagram of the adjusting limit device in Embodiment 4 of this utility model;
[0035] Figure 9 This is a schematic diagram of the depth adjustment mechanism in Embodiment Six of this utility model;
[0036] Figure 10 This is a schematic diagram of the adjusting limit device in Embodiment Six of this utility model;
[0037] Figure 11 This is a schematic diagram of the variable radius wheel in Embodiment 7 of this utility model;
[0038] Figure 12 This is a schematic diagram of the depth adjustment mechanism in Embodiment 8 of this utility model;
[0039] Figure 13 This is a schematic diagram of the depth adjustment mechanism in Embodiment 10 of this utility model;
[0040] Figure 14 This is a schematic diagram of the depth adjustment mechanism in Embodiment Eleven of this utility model;
[0041] Figure 15 This is a schematic diagram of the depth adjustment mechanism in Embodiment Twelve of this utility model;
[0042] Figure 16 This is a schematic diagram of the depth adjustment mechanism in Embodiment 9 of this utility model;
[0043] In the diagram, 1. Trigger mechanism; 2. Depth adjustment mechanism; 3. Piercing gun body; 4. Mounting cavity; 5. Support block; 6. Stop block; 7. Sliding rod; 8. First elastic component; 9. Piercing component; 10. Needle ejection button; 11. Needle retraction trigger; 101. Connecting rod; 102. First latch; 103. Pin shaft; 104. Linkage mechanism; 1041. L-shaped transmission rod; 1042. Pin hole; 1043. Spherical part; 1044. Second latch; 105. Second elastic component; 106. Limiting plate; 107. Button transmission part; 108. Magnetic material; 109. Electromagnet; 1010. Electromagnet switch; 1011. Push rod; 1012, Third elastic component; 21, Adjusting body; 211, Trapezoidal cylinder; 212, Variable diameter rotating cylinder; 213, Variable radius wheel; 2131, Frustum; 2132, Stop lever; 224, Cam; 22, Adjustment limit device; 221, Sliding frame; 222, First straight rack; 223, Sawtooth turntable; 224, Drive shaft; 225, Rotating turntable; 23, Adjustment device; 231, Sliding track; 232, Baffle; 233, Locking switch; 24, Adjusting rod; 25, Limiting groove; 26, First sliding groove; 27, Sliding block; 12, Second straight rack; 13, Needle advance knob; 14, Second transmission gear; Detailed Implementation
[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0045] Example 1
[0046] like Figures 1-4 As shown, a treatment device with controllable puncture depth includes a puncture gun body 3 and a puncture component 9. The puncture gun body 3 has an installation cavity 4, a support block 5 fixedly installed within the installation cavity 4, and a stop block 6 slidably installed within the installation cavity 4. A first elastic component 8 is provided between the stop block 6 and the support block 5. The puncture component 9 is installed on the stop block 6, and its other end slidably extends out of the puncture gun body 3. A needle ejection button 10 for controlling needle ejection is installed on the puncture gun body 3. The device is characterized by: a trigger mechanism 1 for controllably launching the puncture component 9 being provided within the installation cavity 4; the needle ejection button 10 controlling the movement of the stop block 6 via the trigger mechanism 1; and a depth adjustment mechanism 2 cooperating with the stop block 6 being provided within the installation cavity 4 for adjusting the puncture depth of the puncture component 9. The puncture component 9 is a puncture needle.
[0047] The trigger mechanism 1 includes a linkage mechanism 104 rotatably installed in the mounting cavity 4. A needle retraction trigger 11 that slides out of the trigger mechanism 1 is fixedly provided at the lower end of the stop block 6. A connecting rod 101 is fixedly provided at one end of the needle retraction trigger 11. A first latch 102 that cooperates with the linkage mechanism 104 is provided on the connecting rod 101. A limit plate 106 is slidably installed in the mounting cavity 4. A second elastic component 105 is provided between the limit plate 106 and the needle release button 10. A button transmission part 107 that cooperates with the linkage mechanism 104 is provided on the limit plate 106. A third elastic component 1012 is provided between the linkage mechanism 104 and the mounting cavity 4.
[0048] The linkage mechanism 104 includes an L-shaped transmission rod 1041 rotatably installed in the mounting cavity 4. A pin 103 is fixedly installed on the mounting cavity 4. The L-shaped transmission rod 1041 has a pin hole 1042 rotatably installed on the pin 103. The button transmission part 107 has an equilateral triangular structure. One end of the L-shaped transmission rod 1041 is provided with a spherical part 1043 that cooperates with the inclined surface on the button transmission part 107, and the other end is provided with a second lock 1044 that cooperates with the first lock 102. The L-shaped transmission rod 1041 drives the baffle 232 to compress the first elastic member 8 through the second elastic member 105.
[0049] Specifically: the first elastic component 8 is a compression spring, with one end connected and fixed to the support block 5 and the other end connected and fixed to the stop block 6; the second elastic component 105 is a compression spring, with one end connected and fixed to the needle delivery button 10 and the other end connected and fixed to the limit plate 106; the upper end of the button transmission part 107 is an inclined surface; and the third elastic component 1012 is a torsion spring, which drives one side of the L-shaped transmission rod 1041 to be parallel to the needle retraction trigger 11.
[0050] In actual operation: precise puncture is achieved through the coordinated action of trigger mechanism 1 and depth adjustment mechanism 2. When the needle ejection button 10 is pressed, the second elastic component 105 pushes the button transmission part 107 of the limiting plate 106 to contact the spherical part 1043 of the L-shaped transmission rod 1041, forcing the L-shaped transmission rod 1041 to rotate around the pin 103 and release the second latch 1044 from the first latch 102. The first elastic component 8 then releases its elastic potential energy to push the stop block 6 and the puncture component 9 out quickly. The puncture depth is determined by the contact position between the stop block 6 and the depth adjustment mechanism 2. Depth control is achieved by adjusting the stroke limit of the stop block 6. When withdrawing the needle, the withdrawal trigger 11 is pulled, which drives the first locking buckle 102 to re-engage with the second locking buckle 1044 through the connecting rod 101. At the same time, the first elastic component 8 is compressed and reset. The torsion spring ensures that the L-shaped transmission rod 1041 always remains parallel to the withdrawal trigger 11, completing the mechanism cycle. The three-stage elastic components work together to ensure stable puncture force and reduce the risk of tissue damage. The cooperation design between the L-shaped transmission rod 1041 and the equilateral triangular transmission part improves the response speed and avoids jamming. The overall structure is compact and suitable for various clinical scenarios.
[0051] Example 2
[0052] Based on Embodiment 1, a sliding rod 7 is fixedly installed inside the mounting cavity 4, and a stop block 6 is slidably installed on the sliding rod 7. A sliding groove is opened inside the mounting cavity 4, and a limiting plate 106 is slidably installed in the sliding groove. The first latch 102 and the second latch 1044 are both corresponding right-angled triangles. The third elastic component 1012 is a tension spring, with one end connected and fixed to the mounting cavity 4 and the other end connected and fixed to one side of the L-shaped transmission rod 1041.
[0053] Example 3
[0054] Based on Example 1, such as Figure 5 As shown, the trigger mechanism 1 includes an electromagnet 109 fixedly installed in the mounting cavity 4. A needle retraction trigger 11 that slides out of the trigger mechanism 1 is fixedly provided at the lower end of the stop block 6. A connecting rod 101 is fixedly provided at one end of the needle retraction trigger 11. The connecting rod 101 is L-shaped and is provided with a magnetic material 108 corresponding to the electromagnet 109. An electromagnet 109 switch that controls the opening and closing of the electromagnet 109 is provided in the mounting cavity 4. A push rod 1011 corresponding to the electromagnet 109 switch is provided on the needle dispensing button 10. The first elastic component 8 drives the magnetic material 108 away from the electromagnet 109 through the connecting rod 101. The needle dispensing button 10 activates the electromagnet 109 through the cooperation of the push rod 1011 and the electromagnet 109 switch, which drives the puncture component 9 to move through the magnetic attraction between the electromagnet 109 and the magnetic material 108.
[0055] Specifically: Electromagnet 109 is electrically connected to switch 109. When electromagnet 109 is energized, the magnetism generated by electromagnet 109 and magnetic material 108 are opposite magnetic poles. Electromagnet 109 attracts magnetic material 108, thereby causing the needle to emerge. In actual operation: When the needle ejection button 10 is pressed, the push rod 1011 triggers the electromagnet 109 switch, energizing the electromagnet 109 and generating a magnetic pole opposite to the magnetic material 108 on the L-shaped connecting rod 101, forming a strong magnetic attraction. This magnetic force overcomes the resistance of the first elastic component 8, causing the connecting rod 101 and the stop block 6 fixed thereon to move quickly, thereby pushing the puncture component 9 to complete the puncture action. After releasing the needle ejection button 10, the electromagnet 109 is de-energized, the magnetic force disappears, the first elastic component 8 resets, causing the connecting rod 101 and the puncture component 9 to retract. The needle retraction trigger 11 can be manually pulled to assist in the reset, ensuring that the mechanism quickly returns to the ready-to-launch state. The entire process does not require complex mechanical transmission, has a rapid response and controllable force. The use of electromagnetic drive instead of mechanical transmission simplifies the structure, reduces wear, and extends the service life. The instantaneous response of the magnetic force improves the consistency of the puncture speed.
[0056] Example 4
[0057] Based on any of the above embodiments, such as Figures 6-8 As shown, the depth adjustment mechanism 2 includes an adjustment body 21 installed in the mounting cavity 4 corresponding to the stop block 6, and an adjustment limit device 22 is provided on the piercing gun body 3 for moving and limiting the adjustment body 21.
[0058] The adjusting body 21 is a trapezoidal cylinder 211 that is slidably installed in the mounting cavity 4. The adjusting limiting device 22 includes a sliding cavity opened on the piercing gun body 3. A sliding frame 221 that slides through the sliding cavity is fixedly installed on the adjusting body 21. A first straight rack 222 is provided at the lower end of the sliding frame 221. A sawtooth-shaped turntable 223 that meshes with the first straight rack 222 is rotatably installed on the piercing cavity. The operation of the sawtooth-shaped turntable 223 in conjunction with the first straight rack 222 drives the adjusting body 21 to move.
[0059] Specifically: the sliding cavity has a quadrilateral cross-section, the sliding frame 221 has a quadrilateral cross-section corresponding to the sliding cavity, the lower end face of the sliding frame 221 has a groove, the first straight rack 222 is fixed in the groove of the sliding frame 221, and the adjusting limit device 22 also includes a limiting mechanism for limiting the rotation of the sawtooth turntable 223. The limiting mechanism adopts one of the limiting bolts and electromagnetic limiting mechanisms, but is not limited to the above two limiting mechanisms.
[0060] Example 5
[0061] Based on Example 4, such as Figure 6 and Figure 8 As shown, the adjusting body 21 is a variable diameter rotating cylinder 212 that is slidably installed in the mounting cavity 4.
[0062] Example 6
[0063] Based on Example 5, such as Figure 9 and Figure 10 As shown, the adjusting body 21 is a variable radius wheel 213 rotatably installed in the mounting cavity 4. The adjusting limiting device 22 includes a drive shaft 224 rotatably mounted on the piercing gun body 3. The drive shaft 224 is coaxially and fixedly connected to the variable radius wheel 213. A rotating turntable 225 is rotatably mounted on the piercing cavity. By operating the rotating turntable 225, the variable radius wheel 213 is driven to rotate. The adjusting limiting device 22 also includes a limiting mechanism for limiting the rotation of the rotating turntable 225.
[0064] Example 7
[0065] Based on Example 6, such as Figure 9 and Figure 11 As shown, the variable radius turntable includes a frustum 2131 fixedly mounted on the drive shaft 224. Four circumferentially evenly distributed stop bars 2132 are fixedly arranged on the frustum 2131, and the length of the four stop bars 2132 gradually increases clockwise.
[0066] Example 8
[0067] Based on Example 6, such as Figure 12 As shown, the variable radius turntable is a cam 224 fixedly mounted on the transmission shaft 224, and the cam 224 is provided with multiple positions, each of which can be continuously adjusted and marked with scale lines.
[0068] Example 9
[0069] Based on any one of the embodiments from Example 1 to Example 3, such as Figure 16 As shown, the depth adjustment mechanism 2 adopts a spring-loaded adjustment device 23. The adjustment device 23 includes a sliding track 231 with a wavy edge corresponding to the stop 6, which is fixedly installed in the installation cavity 4. A baffle 232 corresponding to the stop 6 is slidably installed on the sliding track 231. A locking switch 233 that cooperates with the sliding track 231 is provided on the baffle 232. The locking switch 233 is operated to fix the baffle 232 on the sliding track 231. The wavy edge of the sliding track 231 is provided with a scale corresponding to the puncture depth.
[0070] Example 10
[0071] Based on Embodiment 9, the locking switch 233 includes a limiting hole fixedly opened on the baffle 232. A positioning pin perpendicular to the sliding rail 231 is slidably installed in the limiting hole of the baffle 232. The positioning pin is connected to the baffle 232 through a fourth elastic component. The positioning pin is provided with limiting teeth corresponding to the wavy edge on the sliding rail 231. The fourth elastic component is a limiting spring. One end of the limiting spring is connected and fixed to the positioning pin, and the other end is connected and fixed to the baffle 232. The sliding rail 231 is fixed on one side of the stop block 6 and does not affect the movement of the stop block 6. A sliding groove is opened on the sliding rail 231. The cross-section of the sliding groove is cross-shaped. One end of the baffle 232 is slidably installed in the sliding groove.
[0072] Example 11
[0073] Based on any one of the embodiments from Example 1 to Example 3, such as Figures 13-14 As shown, the depth adjustment mechanism 2 includes an adjustment rod 24 that is slidably installed in the mounting cavity 4. The part of the stop block 6 that contacts and limits the adjustment rod 24 is provided with a limiting groove 25 with an inclined surface. By moving the position of the adjustment rod 24 up and down, the distance between the adjustment rod 24 and the inclined surface in the limiting groove 25 can be adjusted.
[0074] Specifically: The trigger mechanism 1 has a first slide groove 26, and a sliding block 27 is slidably installed in the first slide groove 26. An adjusting rod 24 is installed on the sliding block 27. The trigger mechanism 1 has scale lines that correspond to the sliding block 27. The sliding block 27 has a limiting mechanism that corresponds to the trigger mechanism 1.
[0075] Example 12
[0076] Based on Example 11, such as Figures 13-14 As shown, the inclined surface of the limiting groove 25 of the stop block 6 is stepped and corresponds to the adjusting rod 24.
[0077] Example 13
[0078] Based on Example 1, such as Figure 15 As shown, a connecting rod 101 is fixedly installed on the stop block 6, and a second spur rack 12 is provided at the lower end of the connecting rod 101. A needle advance knob 13 is rotatably installed on the trigger mechanism 1, and a second transmission gear 14 that meshes with the second spur rack 12 is provided on the needle advance knob 13.
[0079] Example 14
[0080] Based on any of the above embodiments, a rigid catheter may be wrapped around the outside of the puncture component 9 of the trigger mechanism 1 for short intervention channels or percutaneous puncture.
[0081] Example 15
[0082] Based on Example 14, the puncture component 9 and the catheter can be flexible for long interventional channels.
[0083] Example 16
[0084] Based on Embodiment Fourteen or Embodiment Fifteen, the tip of the catheter and the tip of the puncture component 9 are provided with a bending device. The bending device is an arc-shaped track of the puncture component 9 or an adjustable sheath, but is not limited to the above two. The tip of the flexible puncture component 9 has a pre-bent angle. The tip of the catheter and the tip of the puncture component 9 are respectively provided with a radiopaque area, which is a metal point or ring that can be radiopaque under ultrasound or CT imaging.
[0085] Example 17
[0086] Based on any of the above embodiments, the puncture component 9 is one of a puncture catheter, a hollow needle, or a hollow conduit. The puncture component 9 may be hollow, with an outlet or multiple micro-hole outlets at its front end and a pipeline at its rear end for delivering therapeutic liquids, delivering steam for hot steam ablation therapy, or delivering a cold medium for cryotherapy. The cold medium is liquid nitrogen, liquid helium, or carbon dioxide.
[0087] Example 18
[0088] Based on any of the above embodiments, a metal electrode / transducer is provided at the tip of the puncture component 9, and a lead wire is connected to the rear end for ablation treatment. The smile treatment includes radiofrequency, microwave, ultrasound, and pulsed electric field.
[0089] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A treatment device with controllable puncture depth, comprising a puncture gun body (3) and a puncture component (9), wherein the puncture gun body (3) is provided with an installation cavity (4), a support block (5) is fixedly provided in the installation cavity (4), a stop block (6) is slidably installed in the installation cavity (4), a first elastic component (8) is provided between the stop block (6) and the support block (5), the puncture component (9) is installed on the stop block (6), and its other end slidably extends out of the puncture gun body (3), and a needle exit button (10) for controlling needle exit is installed on the puncture gun body (3), characterized in that: The mounting cavity (4) is provided with a trigger mechanism (1) for controllable firing of the piercing component (9). The needle ejection button (10) controls the movement of the stop block (6) through the trigger mechanism (1). The mounting cavity (4) is provided with a depth adjustment mechanism (2) that cooperates with the stop block (6) to adjust the piercing depth of the piercing component (9). The trigger mechanism (1) includes a linkage mechanism (104) rotatably installed in the mounting cavity (4). The lower end of the stop block (6) is fixedly provided with a needle retraction trigger (11) that slides out of the trigger mechanism (1). One end of the needle retraction trigger (11) is fixedly provided with a connecting rod (101). The connecting rod (101) is provided with a first latch (102) that cooperates with the linkage mechanism (104). A limit plate (106) is slidably installed in the mounting cavity (4). A second elastic component (105) is provided between the limit plate (106) and the needle ejection button (10). A button transmission part (107) that cooperates with the linkage mechanism (104) is provided on the limit plate (106). A third elastic component (1012) is provided between the linkage mechanism (104) and the mounting cavity (4).
2. The treatment device with controllable puncture depth according to claim 1, characterized in that, The linkage mechanism (104) includes an L-shaped transmission rod (1041) rotatably installed in the mounting cavity (4). A pin (103) is fixedly installed on the mounting cavity (4). A pin hole (1042) is opened on the L-shaped transmission rod (1041) and rotatably installed on the pin (103). The button transmission part (107) has an equilateral triangular structure. One end of the L-shaped transmission rod (1041) is provided with a spherical part (1043) that cooperates with the inclined surface on the button transmission part (107), and the other end is provided with a second latch (1044) that cooperates with the first latch (102). The L-shaped transmission rod (1041) drives the baffle (232) to compress the first elastic component (8) through the second elastic component (105).
3. The treatment device with controllable puncture depth according to claim 1, characterized in that, The trigger mechanism (1) includes an electromagnet (109) fixedly installed in the mounting cavity (4). A retractable trigger (11) extending slidably out of the trigger mechanism (1) is fixedly provided at the lower end of the stop block (6). A connecting rod (101) is fixedly provided at one end of the retractable trigger (11). The connecting rod (101) is L-shaped and has a magnetic material (108) corresponding to the electromagnet (109) on it. A control mechanism for opening and closing the electromagnet (109) is provided inside the mounting cavity (4). An electromagnet (109) switch is provided. The needle dispensing button (10) is provided with a push rod (1011) corresponding to the electromagnet (109) switch. The first elastic component (8) drives the magnetic material (108) away from the electromagnet (109) through the connecting rod (101). The needle dispensing button (10) activates the electromagnet (109) through the cooperation of the push rod (1011) and the electromagnet (109) switch. The puncture component (9) is moved by the magnetic attraction between the electromagnet (109) and the magnetic material (108).
4. A treatment device with controllable puncture depth according to any one of claims 1-3, characterized in that, The depth adjustment mechanism (2) includes an adjustment body (21) installed in the mounting cavity (4) corresponding to the stop (6), and the piercing gun body (3) is provided with an adjustment limiting device (22) for driving the adjustment body (21) to move and limit.
5. The treatment device with controllable puncture depth according to claim 4, characterized in that, The adjusting body (21) is either a variable-diameter cylinder or a trapezoidal cylinder (211) that is slidably installed in the mounting cavity (4). The adjusting limiting device (22) includes a sliding cavity opened on the piercing gun body (3). A sliding frame (221) that slides through the sliding cavity is fixedly installed on the adjusting body (21). A first straight rack (222) is provided at the lower end of the sliding frame (221). A sawtooth-shaped turntable (223) that meshes with the first straight rack (222) is rotatably installed on the piercing cavity. The operation of the sawtooth-shaped turntable (223) in conjunction with the first straight rack (222) drives the adjusting body (21) to move.
6. The treatment device with controllable puncture depth according to claim 4, characterized in that, The adjustment body (21) is a variable radius wheel (213) rotatably installed in the mounting cavity (4). The adjustment limiting device (22) includes a transmission shaft (224) rotatably mounted on the piercing gun body (3). The transmission shaft (224) is coaxially and fixedly connected to the variable radius wheel (213). A rotating turntable (225) is rotatably mounted on the piercing cavity. The variable radius wheel (213) is driven to rotate by operating the rotating turntable (225).
7. A treatment device with controllable puncture depth according to any one of claims 1-3, characterized in that, The depth adjustment mechanism (2) adopts a spring knife adjustment device (23). The adjustment device (23) includes a sliding track (231) with a wave-shaped edge corresponding to the stop (6) and fixedly installed in the mounting cavity (4). A baffle (232) corresponding to the stop (6) is slidably installed on the sliding track (231). A locking switch (233) cooperating with the sliding track (231) is provided on the baffle (232). The locking switch (233) is operated to fix the baffle (232) on the sliding track (231).