TWI765478B - Blade Removal Device for Skin Knife - Google Patents

Abstract

A blade removing device for a dermatome knife, comprising a base body, a push rod and a gear set in the base body, and a positioning groove is provided on the top surface of the base body for inserting the handle of the skin cutter. In the setting position, a driving rod is set outside the base, which can be rotated to drive the gear to rotate, so that the gear drives the push rod to move horizontally, so that the front end of the push rod pushes the blade of the peeling knife out of the handle Removal; this makes the removal of the blade more labor-saving, convenient, fast and safe.

Description

Blade Removal Device for Skin Knife

The present invention relates to the technical field of a dermatome blade removing device, in particular to a dermatome blade removing device which can make the blade removal more labor-saving, convenient, fast and safe.

When faced with burns or scalds or the wound area is too large to be sutured directly, if the wound heals slowly on its own, there is a risk of infection or the wound has the risk of organ exposure, skin grafting will be used to heal and rebuild the wound as soon as possible. Skin grafting refers to transplanting the skin on one part of the body to another wound with a skin defect on the body, so as to achieve the purpose of early healing and reconstruction of the wound. The pre-operation of skin grafting is to take the skin. Generally, a special dermatome is usually used to cut the skin of the appropriate part and thickness of the patient.

Please refer to FIG. 1 and FIG. 2 , which show a common structure of a dermatome 10 including a handle 11 , a blade 12 and a sheath 13 . The knife handle 11 includes a handle section 110 and an embedded section 111 extending from one end of the handle section 110 and having a smaller thickness, so that a shoulder is formed at the intersection of the handle section 110 and the embedded section 111 Section 112. Two opposite sides of the handle section 110 have two concave portions 113 near the shoulder portion 112 . The inserting segment 111 has an inserting groove 114 which opens downward and extends to the end. The blade 12 is inserted into the insert groove 114 by the end of the insert segment 111 . The sheath 13 is sleeved on the embedding section 111 and covers one side of the blade 12 to protect the edge of the blade 12 and assist the blade 12 to cut the thickness of the skin. The sheath 13 is embedded in the sheath 13 There are a plurality of through grooves on one side of the embedded segment 111 130.

Generally, blood will adhere to the handle 11 , the blade 12 and the sheath 13 when the scalpel 10 is used to remove the skin, and the medical staff disassembles the sheath 13 and the blade 12 and discards the handle. 11. Cleaning, disinfection and sterilization to facilitate the next use, usually only after the skin grafting operation. However, it generally takes several hours from the completion of the skin extraction to the complete end of the skin grafting operation, and at this time, the blood adhering to the handle 11, the blade 12 and the sheath 13 has already coagulated, causing the The blade 12 and the sheath 13 are not easily removed from the handle 11 . At present, the way that medical staff disassemble the sheath 13 and the blade 12 is mainly to first use a pliers (not shown in the figure) to clamp the sheath 13 and apply force to pull it up from the embedded section 111 of the knife handle 11 Then use the pliers to clamp the blade 12 and pull it out from the embedding groove 114 of the embedding segment 111, which is not only very laborious and troublesome. Moreover, it is very difficult to grasp the degree of force applied when the blade 12 is pulled out and the timing when the force piece 12 is disengaged from the insert groove 114. Therefore, under the action of the strong inertial force generated when the blade 12 is disengaged, there are often accidental drawings. Injuring the arm of the medical staff occurs, and it is very unsafe.

In view of this, the inventors of the present invention have developed and designed the present invention in order to address the above-mentioned problems, have in-depth ideas, and actively researched and improved trials.

The main purpose of the present invention is to effectively solve the problems of labor, trouble and unsafety existing in the way that medical staff use forceps to remove the blade of the dermatome.

The present invention provides a blade removing device for a dermatome. The dermatome includes a handle and a blade. The handle includes a handle segment and an embedded segment extending from one end of the handle segment. The intersection of the two forms a shoulder, and the blade is embedded in the embedded segment. The blade removing device of the dermatome comprises a base, a push rod and a gear. Among them, the system has internal There is a chute penetrating to the front side and a gear slot communicating with the chute, two positioning bumps are protruded from the front side of the top surface, and a positioning groove is formed between the two positioning bumps for the The rear end of the embedding segment is embedded, and the rear end of the positioning groove has a larger clamping slot for the shoulder to be embedded. The push rod is slidably arranged in the chute, and the lower side is provided with a row of teeth formed by a plurality of protruding teeth. The gear train is rotatably arranged in the gear groove and meshes with the row of teeth of the push rod, and can be driven to rotate by a drive rod outside the base body.

The blade removing device of the dermatome provided by the present invention can drive the gear to rotate through the drive rod, so that the gear drives the push rod to move horizontally, and the front end of the push rod can drive the dermatome to rotate. The blade is pushed out and removed from the handle, which can make the removal of the blade more labor-saving, convenient, fast and safe.

10: Skin Knife

11: Knife handle

110: Grip segment

111: Embedded segment

112: Shoulder

113: Depression

114: Groove

12: Blades

13: Sheath

130: Grooving

20: seat body

21: Chute

22: Gear slot

23: Positioning bumps

24: Positioning the groove

25: Card slot

26: Limit bolt

27: Limit block

270: Projection

28: Sheath removal slot

280: Fixed slot

281: Side Cover

282: Gutter

29: Snaps

30: putter

31: row teeth

40: Gear

41: capping

42: Gear shaft

43: Drive lever

50: card block

60: Collection Box

61: Opening

62: Buckle slot

[Fig. 1] is a three-dimensional exploded schematic view of the dermatome.

[Fig. 2] is a schematic diagram of the three-dimensional combination of the dermatome.

[Fig. 3] is a perspective exploded schematic view of the present invention.

[Fig. 4] is a perspective exploded schematic view of the other side of the present invention.

[Fig. 5] is a perspective view of the dermatome of the present invention when the dermatome is not inserted into the sheath removal groove.

[Fig. 6] is a schematic view of the action of the dermatome of the present invention when it is inserted into the sheath removal groove.

[Fig. 7] is a schematic view of the action when the sheath of the dermatome of the present invention is removed.

[FIG. 8] is a three-dimensional schematic view of the dermatome of the present invention when it is not embedded in the positioning groove.

[Fig. 9] is an enlarged schematic top view of the dermatome of the present invention when it is embedded in the positioning groove.

[Fig. 10] is a schematic cross-sectional view taken along line A-A of Fig. 9. [Fig.

[Fig. 11] is a schematic view of the operation of the dermatome of the present invention when the blade is removed.

Please refer to FIG. 3 to FIG. 11 , which show that the blade removing device of the dermatome according to the present invention includes a base 20 , a push rod 30 , a gear 40 , a clamping block 50 and a collection box 60 , wherein :

The base body 20 has an elongated chute 21 which penetrates to the front side, and a gear slot 22 which communicates with the chute 21. Two positioning projections 23 are protruded from the front side of the top surface. A positioning groove 24 is formed between the positioning protrusions 23 for inserting the part of the rear end of the embedding segment 111 of the peeling knife 10 that does not have the embedding groove 114. The rear end of the positioning groove 24 is larger A slot 25 can be embedded in the shoulder 112 of the handle section 110 of the dermatome 10 . In addition, two limit blocks 27 are locked on the seat body 20 by two limit bolts 26 on both sides of the rear of the card slot 25 respectively, and two protrusions 270 are formed on the opposite sides of the two limit blocks 27 respectively. It can be clamped in the two concave portions 113 of the handle segment 110 to increase the clamping and positioning effect of the handle segment 110 . In addition, a side surface of the base body 20 is provided with a sheath removal groove 28 extending to the top surface. A fixing groove 280 is formed on a side groove wall of the sheath removal groove 28 and is sealed by a side cover 281. Set on one side of the jacket removal groove 28, a conical drainage groove 282 is opened on the lower side groove wall of the jacket removal groove 28, which can be used to discharge the water in the jacket removal groove 28. bloody water. The front side of the base body 20 is provided with a plurality of fasteners 29, and the fasteners 29 can be a plurality of bolts.

The push rod 30 is axially slidably disposed in the chute 21 , and a row of teeth 31 composed of a plurality of protruding teeth is disposed on the underside of the push rod 30 .

The gear 40 is rotatably arranged in the gear slot 22, can engage with the row of teeth 31 of the push rod 30, and is enclosed in the gear slot 22 with a cover 41, the gear 40 The system has a gear shaft 42 protruding from the cover 41 to the outside, and a driving rod 43 passes through it.

One end of the clamping block 50 is embedded in the fixing groove 280 , and the other end protrudes into the sheath removing groove 28 , and has a wedge shape. The tip can be clamped in the through groove 130 of the sheath 13 .

The collection box 60 is disposed on the front side of the base body 20 and has an opening 61 for receiving the blade 12 removed from the dermatome 10 . One side of the collection box 60 has a plurality of snap grooves 62 for snap-fit with the plurality of snaps 29 on the base body 20 , so that the collection box 60 can be detachably combined in front of the base body 20 side.

It can be seen from FIGS. 5 to 7 , when the front end of the embedment section 111 of the dermatome 10 is inserted into the sheath removal slot 28 , the front end of the blocking block 50 is clamped on the sheath 13 . One of the grooves 130 on one side is inserted, and then the handle section 110 of the peeling force 10 is pulled upward, and the sheath 13 will be left in the sheath removal groove 28, so that the The purpose of removing the sheath 13.

It can be seen in FIGS. 8 to 11 , when the rear section of the engagement section 111 of the dermatome 10 with the sheath 13 removed is inserted into the positioning groove 24, and one side of the blade 12 is pressed against The front side of the base body 20 , and the shoulder 112 of the handle section 110 is embedded in the slot 25 , and the two concave sections 113 of the handle section 110 are embedded in the two protrusions of the two limiting blocks 27 and then rotate the driving rod 43 to rotate the gear 40 to drive the push rod 30 to move, so that the front end of the push rod 30 moves the blade 12 from the embedded groove 114 of the embedded section 111 It is pushed out and dropped into the collecting box 60 . When the collecting box 60 collects enough of the blade 12 , it can be dumped to a recycling place. In this way, when removing the blade 12, it is very labor-saving and convenient, and the operator's hand will not be cut by the blade 12, so it is safer.

20: seat body

21: Chute

22: Gear slot

23: Positioning bumps

24: Positioning the groove

25: Card slot

26: Limit bolt

27: Limit block

270: Projection

28: Sheath removal slot

281: Side Cover

29: Snaps

30: putter

31: row teeth

40: Gear

41: capping

42: Gear shaft

43: Drive lever

50: card block

60: Collection Box

61: Opening

62: Buckle slot

Claims (10)

A blade removing device of a dermatome, the dermatome comprises a handle and a blade, the handle includes a handle segment and an embedded segment extending from one end of the handle segment, and the junction of the two forms a The shoulder part, the blade is embedded in the embedding section; the blade removing device of the dermatome comprises: a body with a chute penetrating to the front side and a gear slot communicating with the chute inside. , the front side of the top surface is protruded with two positioning bumps, a positioning groove is formed between the two positioning bumps for the rear end of the embedding segment to be embedded, and the rear end of the positioning groove has a larger one The slot can be embedded in the shoulder; a push rod is slidably arranged in the chute, and the lower side is provided with a row of teeth composed of a plurality of protruding teeth; and a gear is rotatable It is arranged in the gear groove and meshes with the row of teeth of the push rod, and can be driven to rotate by a driving rod outside the seat body. The blade removing device for a dermatome according to claim 1, wherein the dermatome comprises a sheath, the sheath is embedded on the embedded section and covers one side of the blade, and the sheath is located on the side of the blade. One side of the sleeve is provided with a plurality of through grooves, the blade removing device of the dermatome further comprises a clamping block, and one side of the base is provided with a sheath removal groove extending to the top surface for the insertion of the dermatome. The connecting section extends in, the clamping block is combined with a side groove wall of the sheath removal groove, and one end protrudes out of the groove wall in a wedge shape for being clamped in the groove of the sheath. The blade removing device for a dermatome as claimed in claim 2, wherein a side groove wall of the sheath removing groove is provided with a fixing groove for the clamping block to be embedded, and a side cover is sealed on the sheath one side of the sleeve removal slot. The blade removing device for a dermatome as claimed in claim 2, wherein the The edge of the tip of the clamping block forms a concave arc shape. The blade removing device for dermatome according to claim 3, wherein a conical drainage groove is formed on the lower side groove wall of the sheath removing groove, which can drain the blood water in the groove. The blade removing device for a dermatome knife as claimed in claim 1, wherein two opposite sides of the handle section of the dermatome knife near the shoulder have two concave portions, and the two sides behind the latch groove are respectively provided with two concave portions. The position bolt locks the two limit blocks on the base body, and the opposite sides of the two limit blocks respectively form two protruding parts which can be clamped in the two concave parts to increase the clamping and positioning effect. The blade removing device for a dermatome as claimed in claim 1, wherein the gear groove is sealed by a cover, the gear has a gear shaft extending from the cover to the outside of the base, and and thread it with the drive rod. The blade removing device for a dermatome according to claim 1, further comprising a collection box, the collection box is arranged on the front side of the base and has an opening for receiving the blade removed from the dermatome . The blade removing device for a dermatome as claimed in claim 8, wherein the collection box is detachably coupled to the front side of the base body. The blade removing device for a leather knife according to claim 9, wherein the front side of the base body has a plurality of buckles, and one side of the collection box has a plurality of buckle grooves for the buckle combination with the plurality of buckles .

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