Continuous firing tongs

Abstract

The application relates to a medical surgical instrument, in particular to a continuous-release clip applier. The continuous-release clip applier comprises a shell, a barrel assembly and a firing assembly, the barrel assembly is installed on the front side of the shell through a rotating knob, the firing assembly comprises a trigger and a push rod connected with the trigger, the barrel assembly comprises a fixed tube connected with the rotating knob, a clip feeding plate and a clip storage block are arranged in the fixed tube, the rotating knob is provided with a front-to-back penetrating fixing groove, the fixed tube is movably matched and penetrates the fixing groove, the fixed tube is provided with a first matching groove extending along the front-to-back direction and penetrating laterally, a first fixing pin is matched at the first matching groove, and the first fixing pin is fixed with the rotating knob and the clip storage block; the sidewall of the fixed tube and the clip storage block are both formed with a hemostatic clip mounting port, and the hemostatic clip mounting port is located on the front side of the rotating knob. The application has the advantages that the clip can be released for multiple times for testing, and the number of the hemostatic clips in the clip storage block can be ensured to be relatively large when the clip applier is delivered.

Description

Technical Field

[0001] This invention relates to a medical surgical instrument, specifically to a rapid-fire clamp. Background Technology

[0002] Repeating clamps are widely used in surgical tissue closure procedures. Existing repeating clamps typically have multiple clamps pre-installed inside the clamp storage block before assembling other components. After all components are assembled, a clamp release test is performed.

[0003] The existing continuous-fire clamps have significant defects in the production assembly and factory inspection processes: the assembly sequence is fixed, requiring all hemostatic clamps to be pre-loaded into the clamp storage block before assembling the remaining components. During the assembly of subsequent components, the clamps in the storage block are prone to positional displacement, which can easily cause the clamping action of the finished product to fail; in order to ensure that the number of hemostatic clamps in the storage block meets the standard, only a small number of clamp release tests can be performed after assembly is completed. The sample size for sampling tests is limited, making it difficult to effectively verify the reliability of the clamp release operation of the remaining hemostatic clamps, resulting in a significant deviation in the quality control of the product before it leaves the factory. Summary of the Invention

[0004] The purpose of this invention is to provide a continuous-fire clamp that can perform multiple clamp release tests while ensuring the number of hemostatic clamps delivered at the factory.

[0005] To achieve the above objectives, the present invention employs a fully automatic firing clamp, comprising a housing, a barrel assembly, and a firing assembly. The barrel assembly is mounted on the front side of the housing via a rotating lever. The firing assembly includes a trigger and a push rod linked to the trigger. The barrel assembly includes a fixed tube connected to the rotating lever. The fixed tube is formed by assembling and fixing at least two fixed tube units. The fixed tube contains a feed plate and a storage block. The storage block has a clamp head at its front end. The rotating lever has a fixing groove that extends through the front and rear to engage with the fixed tube. The fixed tube is movably engaged with the rotating lever and passes through the fixing groove. The fixed tube has a first mating groove that extends in the front-rear direction and extends laterally. A first fixing pin is engaged in the first mating groove and is fixed to the rotating lever and the storage block. The front end of the fixing tube extends to the front side of the rotating knob. The side wall of the fixing tube and the storage block are both formed with corresponding hemostatic clip mounting ports for the passage of hemostatic clips. The hemostatic clip mounting ports are close to the rotating knob and located in front of the rotating knob. The rear end of the fixed tube extends into the housing. The rear end of the feeding clamp is linked with the push rod. The front end of the push rod is slidably fitted inside the fixed tube. The side wall of the fixed tube is provided with a second mating groove extending in the front-rear direction. A second fixing pin is fitted in the second mating groove. The second fixing pin is fixed to the push rod or the feeding clamp.

[0006] When assembling the automatic firing clamp of this invention, the barrel assembly, feed plate and storage block, push rod and rotary knob can be assembled first. The hemostatic clip is placed into the storage block through the hemostatic clip mounting port, and then the push rod is pushed forward. At this time, the rotary knob is kept stationary (the first fixing pin and the storage block are stationary). The push rod moves forward and pushes the feed plate forward. The spring clip of the feed plate that extends into the storage block (which is the push clip structure of the conventional feed plate) pushes the hemostatic clip located in the storage block forward by one unit. Then the push rod is reset and the feed plate is reset. After the fixing tube and the hemostatic clip mounting port of the storage block are aligned, the next hemostatic clip is placed in. The above actions are repeated to fill the storage block with hemostatic clips. Once the storage block is full, push the push rod forward to eject the foremost hemostatic clamp. Repeat this process multiple times to perform multiple clamp ejection tests. If the test results are good, proceed with the assembly of other components. If the test results are poor, or if there are jamming issues, then only the assembled components need to be disassembled.

[0007] This invention changes the traditional process of pre-assembling all hemostatic clips before assembling the entire machine. Instead, it assembles the clip delivery components first, then loads the hemostatic clips, preventing clip displacement within the storage block during assembly and reducing the risk of clip failure. The lateral hemostatic clip mounting port enables disassembly-free clamping. Multiple continuous clip delivery tests can be conducted immediately after the pre-assembly stage of the clip delivery components, eliminating the limitation to small-scale sampling inspection of finished products. This allows for thorough verification of the reliability of all hemostatic clip delivery within the storage block, improving factory quality control. If jamming or other malfunctions occur during testing, only the clip delivery components need to be inspected, eliminating the need for complete machine disassembly and facilitating repairs. Preferably, the fixing tube includes a first fixing tube, the rear section of which is provided with a first mating groove and a second mating groove, the front section of which extends to the front side of the rotating knob and has the hemostatic clip mounting port, the fixing tube unit includes at least two first fixing tube units extending in the front-rear direction for constituting the first fixing tube, and the inner wall of the first fixing tube unit and the storage clip block are provided with a positioning structure for restricting the rotation of the storage clip block or the delivery clip plate relative to the first fixing tube.

[0008] The first and second mating grooves are located at the rear section of the first fixing tube, and the hemostatic clip installation port is located at the front section extending to the front side of the rotating knob, realizing the partitioned arrangement of the transmission area and the clamping area to avoid mutual interference of actions; the first fixing tube is composed of at least two single units extending front and back, which facilitates the internal assembly of the storage block and the delivery plate; a positioning structure is set between the inner wall of the first fixing tube unit and the storage block or the delivery plate, which can restrict the circumferential rotation of the storage block and the delivery plate relative to the first fixing tube. On the one hand, it ensures that the storage block rotates synchronously when the rotating knob adjusts the angle, and the angle adjustment is reliable; on the other hand, it prevents the delivery plate from twisting and shifting during the reciprocating pushing of the clamp, ensuring the straightness of the pushing clamp, effectively avoiding the risk of clamping, and reducing the wear of the moving parts, thereby improving the stability of multiple consecutive clamping actions.

[0009] Preferably, when all the first fixed tube units are assembled, the rear section of the first fixed tube is annular, and the front section of the first fixed tube has at least two limiting parts that extend in the front-rear direction and are spaced apart. The positioning structure is disposed on the limiting parts, and the storage block and the delivery plate are located relative to each other within the space enclosed by the at least two limiting parts. The fixation tube further includes a second fixation tube, and the fixation tube unit further includes at least two second fixation tube units extending in the front-rear direction for constituting the second fixation tube. The second fixation tube is sleeved and fixed outside the front section, storage block and delivery plate of the first fixation tube, and the second fixation tube has the hemostatic clip installation port.

[0010] The rear section of the first fixed tube after assembly has an annular cross section, which can improve the rigidity of the area where the first and second mating grooves are located and ensure smooth and stable sliding of the fixed pin. The front section is provided with multiple spaced and extended limiting parts, and the storage block and the delivery plate are accommodated in the space enclosed by the limiting parts. The positioning structure on the limiting parts reliably restricts the circumferential rotation of the storage block and the delivery plate, and avoids the delivery plate from twisting and tilting. At the same time, the hollow structure in the front section reserves operating space for the lateral loading of hemostatic clips.

[0011] A second, separate fixing tube is added and fitted onto the outer side of the front section of the first fixing tube. This serves two purposes: firstly, it tightens the limiting part, preventing it from opening under stress and maintaining the anti-rotation positioning effect of the internal components; secondly, it forms an outer protective structure, improving the overall rigidity of the front section of the barrel. The second fixing tube has a hemostatic clip installation port, forming a continuous and regular lateral clamping channel, preventing scraping and displacement during the hemostatic clip loading process. The double-layered, split, assembled sleeve structure facilitates the pre-installation of the storage block and delivery plate, making assembly, disassembly, and maintenance convenient; the functional separation of the inner and outer tubes allows for easy tolerance control, making it suitable for mass production.

[0012] Preferably, the rear end of the second fixing tube is embedded in the middle of the first fixing tube and restricts the relative rotation between the first fixing tube and the second fixing tube.

[0013] The rear end of the second fixing tube unit is interlocked with the middle part of the first fixing tube unit, which can restrict the relative rotation between the first fixing tube and the second fixing tube, ensuring that the hemostatic clip installation port on the second fixing tube is always aligned with the internal channel, and continuously ensuring the smooth flow of the lateral hemostatic clip; the interlocking structure is reliable and can transmit torsional torque synchronously, so that the double-layer sleeve rotates synchronously, and the assembly is simpler.

[0014] Preferably, the rear section width of the first fixing tube is greater than the front section width of the first fixing tube to form a stepped structure. When the second fixing tube is installed with the first fixing tube, the rear end face of the second fixing tube is in contact with or near the stepped surface of the stepped structure.

[0015] The second fixed pipe is axially limited by the stepped surface to prevent it from moving back and forth.

[0016] Preferably, the feeding plate is provided with a third mating groove extending in the front-back direction, the first fixing pin is fitted in the third mating groove, and the length of the third mating groove in the front-back direction is greater than the length of the first mating groove in the front-back direction.

[0017] The above configuration decouples the rotary adjustment of the lever and the rotation of the storage block from the forward and backward pushing motion of the feed plate, ensuring that the two types of actions do not interfere with each other. The length of the third mating groove in the forward and backward direction is greater than that of the first mating groove, providing sufficient margin for the complete pushing and resetting stroke of the feed plate. During the entire clamping process, the first fixing pin will not impact the end of the third mating groove, preventing movement jamming. At the same time, it can compensate for the cumulative axial assembly tolerance of the components, adapt to multiple continuous clamping test conditions, reduce the wear of parts caused by rigid impacts under reciprocating motion, and ensure stable and reliable continuous clamping action.

[0018] Preferably, the housing is provided with a guide groove extending in the front-rear direction, the push rod includes a body that fits in the guide groove, the rear end of the body is provided with a linkage part that extends outward and circumferentially for contacting the trigger, the linkage part extends coaxially and integrally with an extension section, the width of the extension section is smaller than the width of the body, the middle part of the extension section is provided with a guide part that extends outward and circumferentially, and the rear end of the extension section is integrally formed with a push protrusion. A ratchet is rotatably mounted on the rear part of the inner cavity of the housing. The ratchet is located on the lower side of the rear end of the extension section. The rear end of the housing is provided with a window for observing the ratchet teeth. A tooth groove is formed between two adjacent ratchet teeth of the ratchet. The tooth groove includes a working surface and a mating surface. The mating surface is longer than the working surface. A mark is formed on the mating surface.

[0019] The push rod body cooperates with the housing guide groove to achieve the main direction. The rear end of the body is provided with a linkage part to receive the trigger driving force. The linkage part extends backward into a narrower extension section. The guide part in the middle of the extension section forms a secondary support for the slender extension section to avoid excessive swaying of the extension section cantilever. The end push protrusion is used to cooperate with the ratchet to achieve the counting function.

[0020] A ratchet is rotatably mounted in the rear of the housing cavity and located on the lower side of the rear end of the extension section. A window is opened at the rear end of the housing to directly observe the ratchet's status. Markings are set on the mating surface, and the ratchet position can be intuitively identified in conjunction with the observation window, making it easy to confirm the number of shots during continuous clipping tests and improving ease of use.

[0021] During the forward movement of the push rod, the edge of the push protrusion will abut against the mating surface of the ratchet. Since the push rod is mostly made of plastic and has a thinner extension section, the push protrusion will undergo a certain deformation, causing the part of the extension section located behind the guide to bend. Even if the included angle of the tooth groove formed by the working surface and the mating surface is small, it will not affect the disengagement between the push rod and the ratchet, and can also ensure the length of the working surface, ensuring effective contact between the rear end face of the push protrusion and the working surface, achieving smooth tooth sliding and reliable counting.

[0022] Preferably, the inner cavity sidewall of the housing is integrally formed with an elastic positioning part extending in the left-right direction. The elastic positioning part extends to the outer side of the circumference of the ratchet. When the ratchet is not rotating, the elastic positioning part is located in one of the tooth grooves. When the working surface of the ratchet is pushed backward by the protrusion, the ratchet rotates and causes the elastic positioning part to elastically deform.

[0023] Preferably, the extension section includes a thick extension section located on the front side and a thin extension section located on the rear side. The front end of the thick extension section is integrally formed with the linkage part on the same axis. The width of the thick extension section is smaller than the inner diameter of the body. The rear end of the thick extension section is provided with the guide part. The width of the thin extension section is smaller than the width of the thick extension section. The rear end of the thin extension section is integrally formed with the pushing protrusion.

[0024] The thicker extension section has a larger cross-sectional size and higher structural rigidity, which can stably transmit large backward thrust and prevent the extension section from bending as a whole. The thinner extension section has a smaller cross-sectional size and lower rigidity, and has a slight elastic bending capability. When the trigger is pulled and the push rod moves forward, the protrusion is pushed against the ratchet mating surface. The thinner extension section can bend slightly to make room, pushing the protrusion to slide smoothly along the ratchet's inclined surface across the tooth groove.

[0025] Preferably, the elastic positioning part includes a limiting section for extending into the tooth groove of the ratchet, the limiting section having an arc-shaped cross-section, and the arc-shaped opening formed by the limiting section facing the mating surface; the elastic positioning part includes a fixing section connected to the inner wall of the housing cavity and the laterally extending limiting section; When the limiting segment is located within the tooth groove, the two ends of the limiting segment along the ratchet rotation direction are respectively close to the end and root of the mating surface.

[0026] A wider fixed section can ensure structural strength, reduce root stress in the elastic positioning part, and avoid plastic deformation and fatigue cracking caused by repeated springback, thereby extending service life and ensuring that the elastic positioning part can still maintain its performance after multiple springbacks of the ratchet teeth.

[0027] The ends and roots of the mating surfaces are the connection points between the mating surfaces and the two adjacent working surfaces. When the ratchet compression limiting section undergoes elastic deformation, the force is distributed between the front and rear ends of the limiting section, which can reduce the occurrence of single-point concentrated force and local stress overload cracking. This not only strengthens the limiting effect of the limiting part, but also improves the service life of the limiting part.

[0028] This invention has the advantages of allowing for multiple clip removal tests and ensuring a large number of hemostatic clips in the storage block at the time of shipment. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of the present invention.

[0030] Figure 2 This is a cross-sectional view of the barrel assembly of the present invention.

[0031] Figure 3 This is a schematic diagram of a structure in which the fixed tube, storage clamp, and delivery clamp plate of the present invention are combined.

[0032] Figure 4 This is a schematic diagram of one structure of the first fixed tube unit of the present invention.

[0033] Figure 5 This is a schematic diagram of a structure after the first and second fixing tubes of the present invention are assembled.

[0034] Figure 6 This is a cross-sectional view of the fixing tube of the present invention.

[0035] Figure 7 This is a cross-sectional view of the housing of the present invention.

[0036] Figure 8 This is a schematic diagram of one possible structure of the push rod of the present invention.

[0037] Figure 9 This is a schematic diagram of a ratchet assembly within a housing according to the present invention. Detailed Implementation

[0038] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0039] Depend on Figures 1 to 3As shown, a type of automatic fire clamp includes a housing, a barrel assembly, and a firing assembly. The barrel assembly is mounted on the front side of the housing 12 via a rotary knob 11. The firing assembly includes a trigger 13 and a push rod 2 linked to the trigger. The barrel assembly includes a fixed tube 3 connected to the rotary knob 11. The fixed tube contains a clip feed plate 4 and a clip storage block 7. A clamp head 6 is provided at the front end of the clip storage block 7. The clip feed plate 4 is located at the lateral opening of the clip storage block 7. The front end of the fixed tube 3 extends to the front side of the rotary knob 11. Both the side wall of the fixed tube 3 and the clip storage block 7 have corresponding hemostatic clip mounting ports 100 for the passage of a hemostatic clip 200. The hemostatic clip mounting ports 100 are close to the rotary knob 11 and located in front of the rotary knob 11.

[0040] The rotary knob 11 has a fixing groove that runs through the front and rear to fit the fixing tube 3. The fixing tube 3 is movably fitted with the rotary knob 11 and passes through the fixing groove. The fixing tube 3 has a first mating groove 31 that extends in the front and rear direction and runs through the left and right. A first fixing pin 111 is fitted at the first mating groove 31. The first fixing pin 111 is fixed with the rotary knob 11. The rear end of the storage block 7 has a storage block fixing hole with a lateral opening that fits with the first fixing pin 111, so as to realize the fixation between the storage block 7, the rotary knob 11, and the housing 12.

[0041] The rear end of the fixed tube 3 extends into the housing 12. The rear end of the feeding clamp 4 is linked with the push rod 2. The front end of the push rod 2 is slidably fitted into the fixed tube 3. The front section of the push rod 2 is annular and forms a receiving cavity for accommodating the first return spring. The side wall of the fixed tube 3 is provided with a second mating groove 32 extending in the front-rear direction. A second fixing pin 21 is fitted in the second mating groove 32 and is fixed to the push rod 2. The front section of the push rod 2 is provided with a radially penetrating push rod fixing hole for mating with the second fixing pin 21. The rear end of the feeding clamp 4 is provided with a laterally extending abutment portion 41. The rear end face of the abutment portion 41 abuts against the first return spring. The second fixing pin 21 is located in front of and near the abutment portion 41. The first fixing pin 111 extends in the left-right direction, and the second fixing pin 21 extends in the up-down direction. The housing 12 is also provided with a second return spring for mating with the push rod 2, and the rotating knob 11 is provided with a third return spring for mating with the fixed tube 3.

[0042] When using the clamp in this embodiment, the hemostatic clamp is placed into the storage block 7 through the clamp mounting port 100. Then, the push rod 2 is pushed forward while keeping the rotary knob 11 stationary. The push rod 2 moves forward and compresses the first return spring. The front end of the first return spring moves forward and pushes the delivery plate 4 forward. The spring piece of the delivery plate 4, which extends into the storage block 7, pushes the hemostatic clamp located in the storage block 7 forward by one unit. Then, the push rod 2 is released, and it resets under the action of the second return spring. The second fixing pin 21 pushes the abutment part 41 of the delivery plate 4 backward. After the fixing tube 3 and the clamp mounting port 100 of the storage block 7 are aligned, the next hemostatic clamp is placed in. The above actions are repeated to fill the storage block 7 with hemostatic clamps 200.

[0043] When the push rod 2 is pushed forward, the linkage part 20 on the push rod 2 contacts the rear end face of the fixed tube 3, causing the fixed tube 3 to move forward against the action of the third return spring. The front end of the fixed tube 3 contacts the open jaws 6 to close the jaws 6. After the force applied to the push rod 2 is released, the fixed tube 3 returns to its original position under the action of the third return spring.

[0044] Depend on Figures 1 to 6 As shown, the fixing tube 3 includes a first fixing tube 310. The rear section of the first fixing tube 310 is provided with a first mating groove 31 and a second mating groove 32. The front section of the first fixing tube 310 extends to the front side of the rotating knob 11 and has a hemostatic clip mounting port 100. The first fixing tube 310 includes two first fixing tube units 3100 extending in the front-rear direction, which are used to assemble the first fixing tube 310. A positioning structure is provided between the inner wall of the first fixing tube 310 and the storage block 7 to restrict the rotation of the storage block 7 relative to the first fixing tube 310. Figure 3 As shown, the first fixing tube 310 has a positioning section with a square inner edge and a first positioning plane 3101. The first positioning plane 3101 contacts the outer surface of the storage block 7 to restrict the relative rotation of the storage block 7, which has a U-shaped cross-section. A fitting and tight-fitting structure 3102 for splicing and positioning is provided between the two first fixing tube units 3100. The fitting and tight-fitting structure 3102 includes a fitting and tight-fitting protrusion and a fitting and tight-fitting groove.

[0045] Depend on Figure 4As shown, in this embodiment, the front section of the first fixing tube 310 has two limiting portions 3103 arranged opposite each other and extending in the front-back direction. Each first fixing tube unit 3100 has one limiting portion 3103 at its front section. A second positioning plane 3104 is formed on the inner surface of the limiting portion 3103. The storage block 7 and the delivery plate 4 are located between the two limiting portions 3103. One second positioning plane is used to restrict the storage block 7 from flipping, and the other second positioning plane is used to restrict the delivery plate 4 from flipping. The rear section of the first fixing tube unit 3100 has an arc-shaped cross section. When two first fixing tube units 3100 are joined together, the rear section of the first fixing tube 310 has an annular cross section.

[0046] Depend on Figure 5 As shown, the fixing tube 3 also includes a second fixing tube 320, which includes two second fixing tube units 3200 extending in the front-rear direction. The cross-section of the second fixing tube unit 3200 is arc-shaped. The two second fixing tube units 3200 are joined together to surround the limiting part 3103, the storage block 7, and the delivery plate 4. The second fixing tube 320 has a hemostatic clip installation port 100. The rear end of the second fixing tube unit 3200 is embedded in the middle of the first fixing tube unit 3100 and restricts the relative rotation between the first fixing tube 310 and the second fixing tube 320. The rear end of the second fixing tube unit 3200 forms a T-shaped embedding groove, and the rear end of the limiting part 3103 forms an embedding protrusion extending in the front-rear direction and an embedding protrusion 3105 extending in the circumferential direction. The rear section of the first fixing tube 310 is wider than the front section of the first fixing tube 310 to form a stepped structure. When the second fixing tube 320 is installed with the first fixing tube 310, the rear end face of the second fixing tube 320 is in contact with or near the stepped surface 34 of the stepped structure.

[0047] Depend on Figures 1 to 3 As shown, the feeding clamp 4 has a third mating groove 42 that extends horizontally and horizontally and along the front-back direction. The first fixing pin 111 is fitted into the third mating groove 42. The length of the third mating groove 42 along the front-back direction is greater than the length of the first mating groove 31 along the front-back direction. Figure 6 As shown, a limiting structure is also provided between the limiting part 3103 and the feeding plate 4. The limiting structure includes a limiting protrusion 3106 provided on a limiting part 3103. An inner protrusion 401 and an outer groove 402 are formed on the feeding plate 4 by stamping. The inner protrusion 401 is located in the storage cavity formed by the storage block 7 to guide the hemostatic clip 200. The limiting protrusion 3106 extends into the outer groove 402 to prevent the feeding plate 4 from swaying left and right. The surface of the limiting protrusion 3106 that contacts the groove wall of the outer groove 402 is an arc surface.

[0048] Depend on Figures 7 to 9As shown, the housing 12 has a guide groove 121 extending in the front-rear direction. The push rod includes a body 21 that fits into the guide groove. The body 21 has an annular cross-section and is used to accommodate the first return spring. The rear end of the body 21 has a linkage part 20 that extends outward and is used to contact the trigger 13. The second return spring is sleeved on the body 21 and is restricted between the rear side of the rotary knob 11 and the front side of the linkage part 20. The linkage part 20 extends coaxially and integrally to the rear with an extension section 22. The width of the extension section 22 is smaller than the width of the body 21. The middle part of the extension section 22 has a guide part 23 that extends outward and circumferentially. The rear end of the extension section 22 has a push protrusion 24 integrally formed.

[0049] The extension section 22 includes a thick extension section 221 located at the front and a thin extension section 222 located at the rear. The front end of the thick extension section 221 is integrally formed coaxially with the linkage part 20. The outer diameter of the thick extension section 221 is smaller than the inner diameter of the body 21. The rear end of the thick extension section 221 is provided with a guide part 23 extending outward in a circumferential direction. The front end of the thin extension section 222 is connected to the guide part 23. The outer diameter of the thin extension section 222 is smaller than the outer diameter of the thick extension section 221. The rear end of the thin extension section 222 is integrally formed with a pushing protrusion 24. The outer edges of the linkage part 20 and the guide part 23 are both circular, and the outer diameters of the linkage part 20 and the guide part 23 are the same. The outer edge of the cross-section of the pushing protrusion 24 is circular, and the width of the pushing protrusion 24 gradually increases from front to back and is frustoconical.

[0050] A ratchet 5 is rotatably mounted on the rear part of the inner cavity of the housing 12. The ratchet 5 is located on the lower side of the thin extension section 222. The rear end of the housing 12 is provided with a window 120 for observing the ratchet teeth of the ratchet 5. A tooth groove is formed between two adjacent ratchet teeth of the ratchet 5. The tooth groove includes a working surface 51 and a mating surface 52. The mating surface 52 is longer than the working surface 51. A number mark (not shown in the figure) is formed on the mating surface 52.

[0051] An elastic positioning part 6 extending in the left-right direction is integrally formed on the inner cavity sidewall of the housing 12. The elastic positioning part 6 includes a fixed section 61 connected to the inner cavity sidewall of the housing 12 and a laterally extending limiting section 62. The limiting section 62 extends to the outer circumference of the ratchet 5. When the ratchet 5 does not rotate, the limiting section 62 of the elastic positioning part 6 is located in a tooth groove. When a working surface 51 of the ratchet 5 is pushed backward by the protrusion 24, the ratchet 5 rotates and causes the limiting section 62 of the elastic positioning part 6 to elastically deform.

[0052] The limiting section 62 has an arc-shaped cross section. When the limiting section 62 is located in the tooth groove, the two ends of the limiting section 62 along the rotation direction of the ratchet 5 are close to the end and root of the mating surface of the tooth groove, respectively. The arc-shaped opening formed by the limiting section 62 faces the mating surface and abuts against the working surface of the tooth groove.

[0053] In this embodiment, the elastic positioning part 6 is positioned above the axis of the ratchet 5. When the pushing protrusion 24 contacts the ratchet 5, the pushing protrusion 24 is located directly above the ratchet 5, and the elastic positioning part 6 is close to the pushing protrusion 24. The number of ratches on the ratchet 5 between the point where it contacts the elastic positioning part 6 and the point where it contacts the pushing protrusion is less than one-quarter of the total number of ratches.

[0054] When the clamping clamp of this embodiment is used, the user pulls the trigger 130. The inner end of the trigger 130 swings forward and pushes the linkage part 20 of the push rod 2 forward, causing the push rod 2 to move forward as a whole, thereby releasing the clamp. After the user releases the trigger 130, the push rod 2 is reset by the aforementioned return spring, pushing the protrusion 24 to move backward synchronously. This pushes the rear end face of the protrusion 24 to stably fit against the working surface of the tooth groove and applies a backward driving force to the ratchet, causing the ratchet 5 to rotate one tooth position in one direction, thus realizing a single clamping operation corresponding to a single count.

[0055] During the rotation of ratchet 5, the ratchet teeth press against the limiting part, causing the elastic positioning part 6 to undergo a slight elastic deformation to avoid the ratchet teeth, ensuring that the ratchet rotates smoothly without jamming; when the ratchet completes one rotation, the elastic positioning part 6 elastically resets and re-engages into the next tooth groove, forming a reverse lock on ratchet 5, restricting the ratchet 5 from rotating backward, and avoiding counting backward and miscounting.

Claims

1. A fully automatic fire control clamp, comprising a housing, a barrel assembly, and a firing assembly, wherein the barrel assembly is mounted on the front side of the housing via a rotary lever, the firing assembly includes a trigger and a push rod linked to the trigger, the barrel assembly includes a fixed tube connected to the rotary lever, the fixed tube contains a feed plate and a storage block, and the storage block has a clamp head at its front end, characterized in that: The rotary knob has a fixing groove that extends through the front and rear to fit the fixing tube. The fixing tube is movably fitted with the rotary knob and passes through the fixing groove. The fixing tube has a first mating groove that extends in the front and rear direction and extends laterally. A first fixing pin is fitted at the first mating groove. The first fixing pin is fixed to the rotary knob and the storage block. The front end of the fixing tube extends to the front side of the rotating knob. The side wall of the fixing tube and the storage block are both formed with corresponding hemostatic clip mounting ports for the passage of hemostatic clips. The hemostatic clip mounting ports are close to the rotating knob and located in front of the rotating knob. The rear end of the fixed tube extends into the housing. The rear end of the feeding clamp is linked with the push rod. The front end of the push rod is slidably fitted inside the fixed tube. The side wall of the fixed tube is provided with a second mating groove extending in the front-rear direction. A second fixing pin is fitted in the second mating groove. The second fixing pin is fixed to the push rod or the feeding clamp.

2. The rapid-fire clamp according to claim 1, characterized in that: The fixing tube includes a first fixing tube, the rear section of which is provided with a first mating groove and a second mating groove, the front section of which extends to the front side of the rotating knob and has the hemostatic clip installation port, and the fixing tube unit includes at least two first fixing tube units extending in the front-rear direction for constituting the first fixing tube, and the inner wall of the first fixing tube unit and the storage clip block are provided with a positioning structure for restricting the rotation of the storage clip block or the delivery clip plate relative to the first fixing tube.

3. The rapid-fire clamp according to claim 2, characterized in that: When all the first fixed tube units are assembled, the rear section of the first fixed tube is annular, and the front section of the first fixed tube has at least two limiting parts that extend in the front-rear direction and are spaced apart. The positioning structure is disposed on the limiting parts, and the storage clamp and the delivery clamp are located relative to each other in the space enclosed by the at least two limiting parts. The fixation tube also includes a second fixation tube, and the fixation tube unit also includes at least two second fixation tube units extending in the front-rear direction for constituting the second fixation tube. The second fixation tube is sleeved and fixed outside the front section, storage block and delivery plate of the first fixation tube, and the second fixation tube has the hemostatic clip installation port.

4. The rapid-fire clamp according to claim 3, characterized in that: The rear end of the second fixing tube is embedded in the middle of the first fixing tube and restricts the relative rotation between the first fixing tube and the second fixing tube.

5. The rapid-fire clamp according to claim 4, characterized in that: The rear section of the first fixing tube is wider than the front section of the first fixing tube to form a stepped structure. When the second fixing tube is installed with the first fixing tube, the rear end face of the second fixing tube is in contact with or near the stepped surface of the stepped structure.

6. The rapid-fire clamp according to claim 1, characterized in that: The feeding plate is provided with a third mating groove extending in the front-back direction, and the first fixing pin is fitted in the third mating groove. The length of the third mating groove in the front-back direction is greater than the length of the first mating groove in the front-back direction.

7. The rapid-fire clamp according to claim 1, characterized in that: The housing has a guide groove extending in the front-to-back direction. The push rod includes a body that fits into the guide groove. The rear end of the body has a linkage part that extends outward and circumferentially for contacting the trigger. The linkage part extends coaxially and integrally to the rear with an extension section. The width of the extension section is smaller than the width of the body. The middle part of the extension section has a guide part that extends outward and circumferentially. The rear end of the extension section has an integrally formed push protrusion. A ratchet is rotatably mounted on the rear part of the inner cavity of the housing. The ratchet is located on the lower side of the rear end of the extension section. The rear end of the housing is provided with a window for observing the ratchet teeth. A tooth groove is formed between two adjacent ratchet teeth of the ratchet. The tooth groove includes a working surface and a mating surface. The mating surface is longer than the working surface. A mark is formed on the mating surface.

8. The rapid-fire clamp according to claim 7, characterized in that: An elastic positioning part extending in the left-right direction is integrally formed on the inner cavity sidewall of the housing. The elastic positioning part extends to the outer side of the circumference of the ratchet. When the ratchet is not rotating, the elastic positioning part is located in one of the tooth grooves. When the working surface of the ratchet is pushed backward by the protrusion, the ratchet rotates and causes the elastic positioning part to elastically deform.

9. The rapid-fire clamp according to claim 8, characterized in that: The extension section includes a thick extension section located on the front side and a thin extension section located on the rear side. The front end of the thick extension section is integrally formed with the linkage part on the same axis. The width of the thick extension section is smaller than the inner diameter of the body. The rear end of the thick extension section is provided with the guide part. The width of the thin extension section is smaller than the width of the thick extension section. The rear end of the thin extension section is integrally formed with the pushing protrusion.

10. The rapid-fire clamp according to claim 8, characterized in that: The elastic positioning part includes a limiting section for extending into the tooth groove of the ratchet, the limiting section having an arc-shaped cross-section, and the arc-shaped opening formed by the limiting section facing the mating surface; the elastic positioning part includes a fixing section connected to the inner wall of the housing cavity and the laterally extending limiting section. When the limiting segment is located within the tooth groove, the two ends of the limiting segment along the ratchet rotation direction are respectively close to the end and root of the mating surface.

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