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CN-121987300-A - Special skin-expanding needle knife capable of adjusting gear for drainage

CN121987300ACN 121987300 ACN121987300 ACN 121987300ACN-121987300-A

Abstract

The invention belongs to the technical field of medical drainage surgical instruments, and discloses a special skin-expanding needle knife capable of adjusting gears for drainage, which comprises a knife handle, a knife bar, a gear adjusting component and a limit mark, wherein a hollow cavity is arranged in the knife handle, and a positioning groove matched with the gear adjusting component is formed in the knife handle; one end of the cutter bar is movably connected with the cutter handle, the other end of the cutter bar is fixedly provided with a skin expanding cutter head, the gear adjusting assembly is arranged in the hollow cavity and comprises an adjusting button, an elastic clamping block and a reset spring, the adjusting button penetrates through the positioning groove, three adjustable gears of 6F, 7F and 8F are respectively matched with three types of drainage tubes commonly used in clinic, the skin expanding caliber can be rapidly switched through the gear adjusting assembly, a plurality of special skin expanding needle cutters are not required to be prepared for drainage tubes of different specifications, the reserve amount of clinical instruments is greatly reduced, the medical cost is reduced, meanwhile, operation interruption caused by frequent replacement of the instruments is avoided, and the drainage operation efficiency is improved.

Inventors

  • Lv Mingshun
  • ZHANG ZIHONG

Assignees

  • 舟山医院

Dates

Publication Date
20260508
Application Date
20260122

Claims (7)

  1. 1. The utility model provides a special skin-expanding needle sword of drainage of adjustable gear, includes handle of a knife (1), cutter arbor (2), gear adjustment subassembly (3) and spacing sign (4), wherein be equipped with hollow cavity (5) in handle of a knife (1), be equipped with on handle of a knife (1) with gear adjustment subassembly (3) matched constant head tank (6), one end and handle of a knife (1) swing joint of cutter arbor (2), the other end is fixed with skin-expanding tool bit (7), gear adjustment subassembly (3) set up in hollow cavity (5), gear adjustment subassembly (3) include adjusting button (8), elastic fixture block (9) and reset spring (10), adjusting button (8) run through constant head tank (6), one end and adjusting button (8) of elastic fixture block (9) are connected, and the other end and the cutter arbor (2) of elastic fixture block (9) are fixed, and reset spring (10) cover is located elastic fixture block (9) outside, spacing sign (4) set up on handle of a knife (1) surface.
  2. 2. The gear-adjustable special skin-dilating needle knife for drainage, which is disclosed in claim 1, is characterized in that the skin-dilating knife head (7) is made of medical stainless steel, and the knife edge is of an arc blunt design.
  3. 3. The special skin-expanding needle knife for drainage with adjustable gear according to claim 2, wherein the limit marks (4) respectively correspond to gear marks of the 6F, 7F and 8F drainage tubes, the stretching lengths of the corresponding knife heads and the skin-expanding calibers of different gears are sequentially increased, and the skin-expanding calibers are 0.1 to 0.2mm larger than the calibers of the corresponding drainage tubes.
  4. 4. The special skin-expanding needle knife for drainage with adjustable gear according to claim 3, wherein toothed strips (11) are fixed on the inner wall of the positioning groove (6), clamping grooves (12) are formed between the toothed strips (11), and protruding blocks (13) embedded in the clamping grooves (12) are fixed at two ends of the adjusting button (8).
  5. 5. The drainage special skin-expanding needle knife with the adjustable gear according to claim 4, wherein the adjusting button (8) is sleeved on the outer side of the elastic clamping block (9), and two ends of the reset spring (10) are abutted between the adjusting button (8) and the knife handle (1).
  6. 6. The special drainage skin-expanding needle knife with the adjustable gear according to claim 5 is characterized in that anti-skid lines are arranged on the surface of the knife handle (1), and the limit mark (4) adopts a concave-convex etching process.
  7. 7. The special drainage skin-expanding needle knife with the adjustable gear according to claim 6, wherein a sealing washer (14) is arranged at the joint of the knife bar (2) and the knife handle (1), and the sealing washer (14) is made of medical silica gel.

Description

Special skin-expanding needle knife capable of adjusting gear for drainage Technical Field The invention belongs to the technical field of medical drainage surgical instruments, and particularly relates to a special skin-dilating needle knife capable of adjusting gears for drainage. Background In clinical drainage operation, traditional skin-dilating needle sword is mostly single specification design, can't accurate matching different specification drainage tubes, skin-dilating degree of depth and bore are difficult to control, lead to the problem that the number of times of dilating increases, incision size is improper, need be equipped with many special apparatus for different model drainage tubes, not only lead to the apparatus stock to be big, medical cost is high, still cause the operation to break because of the frequently change apparatus in the operation, reduce operation efficiency, the cutter arbor does not have effective seal design with the junction of handle of a knife simultaneously, inside body fluid, tissue liquid easily invade the handle of a knife, cause the pollution to the apparatus, shorten the life of apparatus, can't satisfy clinical operation's high-efficient, stable demand. Therefore, the special drainage skin-expanding needle knife with the adjustable gear is provided for solving the problems. Disclosure of Invention In order to solve the problems in the background technology, the invention provides the special skin-expanding needle knife for drainage with the adjustable gear, which has the advantages of setting a three-gear adjustable skin-expanding caliber and a sealing gasket, greatly reducing the reserve of clinical instruments, ensuring accurate control of the skin-expanding caliber and prolonging the service life of the instruments. The technical scheme is that the special skin-expanding needle knife for drainage comprises a knife handle, a knife bar, a gear adjusting component and a limit mark, wherein a hollow cavity is formed in the knife handle, a positioning groove matched with the gear adjusting component is formed in the knife handle, one end of the knife bar is movably connected with the knife handle, a skin-expanding knife head is fixed to the other end of the knife bar, the gear adjusting component is arranged in the hollow cavity, the gear adjusting component comprises an adjusting button, an elastic clamping block and a reset spring, the adjusting button penetrates through the positioning groove, one end of the elastic clamping block is connected with the adjusting button, the other end of the elastic clamping block is fixed with the knife bar, the reset spring is sleeved on the outer side of the elastic clamping block, and the limit mark is arranged on the surface of the knife handle. Preferably, the skin-expanding tool bit is made of medical stainless steel, and the cutting edge is of an arc blunt design. Preferably, the limit marks correspond to gear marks of the 6F, 7F and 8F drainage tubes respectively, different gears correspond to the extension length of the cutter head and the caliber of the skin expansion is increased gradually, and the caliber of the skin expansion is 0.1 to 0.2mm larger than that of the corresponding drainage tube. Preferably, a toothed strip is fixed on the inner wall of the positioning groove, a clamping groove is formed between the toothed strips, and two ends of the adjusting button are fixed with protruding blocks embedded in the clamping groove. Preferably, the adjusting button is sleeved on the outer side of the elastic clamping block, and two ends of the reset spring are abutted between the adjusting button and the knife handle. Preferably, the surface of the knife handle is provided with anti-skid lines, and the limit mark adopts a concave-convex etching process. Preferably, a sealing washer is arranged at the joint of the cutter bar and the cutter handle, and the sealing washer is made of medical silica gel. Compared with the prior art, the invention has the following beneficial effects: 1. according to the invention, three adjustable gears 6F, 7F and 8F are arranged to respectively match with three types of drainage tubes commonly used in clinic, the skin-expanding caliber can be rapidly switched through the gear adjusting assembly, a plurality of special skin-expanding needle cutters are not required to be prepared for drainage tubes with different specifications, the reserve of clinical instruments is greatly reduced, the medical cost is reduced, meanwhile, the operation interruption caused by frequent replacement of the instruments is avoided, and the drainage operation efficiency is improved. 2. According to the invention, the toothed strip on the inner wall of the positioning groove and the lug of the adjusting button form a buckle type positioning structure, and the elastic limit of the reset spring is matched, so that the stable locking of the gear can be realized, the gear shift caused by external force collision or o