CN209884258U

CN209884258U - Medical abrasive drill bit

Info

Publication number: CN209884258U
Application number: CN201920441199.XU
Authority: CN
Inventors: 张旭峰
Original assignee: Shanghai Changning Medical Treatment Technology Co Ltd
Current assignee: Shanghai Changning Medical Treatment Technology Co Ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2020-01-03
Anticipated expiration: 2029-04-03

Abstract

The utility model provides a medical abrasive drilling bit, which comprises a cutter, a sheath and a handle; the cutter comprises a cutter handle, a bendable cutter bar, a first rotating shaft supporting piece and a grinding head which are connected in sequence; the sheath comprises a handle connector and a bent sleeve; the handle comprises a sheath connecting part and a handle connecting part; the tool is inserted into the sheath, the handle connector is connected with the sheath connecting portion, the tool handle is connected with the tool handle connecting portion, the grinding head penetrates out of the pipe orifice of the bent sleeve, and the first rotating shaft supporting piece is arranged at the pipe orifice of the bent sleeve. Adopt above-mentioned technical scheme, especially adopt the curved sheathed tube setting of cutter arbor cooperation of can bending, make the utility model discloses can bend into arbitrary crookedness according to various operation condition needs to satisfy the demand of all kinds of complicated operations.

Description

Medical abrasive drill bit

Technical Field

The utility model belongs to the technical field of otolaryngology branch of academic or vocational study surgical instruments and specifically relates to a medical abrasive drilling drill bit that can bend.

Background

The otolaryngological operation is special and complicated due to the special anatomical structure and deep and complex cavity, and the common operation knife is difficult to accurately reach the operation position, so the otolaryngological operation instrument is special and fine. The medical abrasive drilling bit is a common surgical instrument for otolaryngological operations, particularly for the department of rhinology and otology, and is widely used. The conventional grinding drill bit which is commonly used in clinic at present is a straight drill bit, but the cavity of an operation area is small and complex, and a straight drill bit at a narrow part or a side part is difficult to penetrate into the narrow part or the side part.

Accordingly, those skilled in the art have endeavored to develop a bendable medical burr drill.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a bendable medical abrasive drilling bit capable of changing the angle of the drill bit according to the operation requirement.

In order to achieve the above object, the utility model provides a medical abrasive drilling drill bit, its characterized in that: comprises a cutter, a sheath and a handle; the cutter comprises a cutter handle, a bendable cutter bar, a first rotating shaft supporting piece and a grinding head which are connected in sequence; the sheath comprises a handle connector and a bent sleeve; the handle comprises a sheath connecting part and a handle connecting part; the tool is inserted into the sheath, the handle connector is connected with the sheath connecting portion, the tool handle is connected with the tool handle connecting portion, the grinding head penetrates out of the pipe orifice of the bent sleeve, and the first rotating shaft supporting piece is arranged at the pipe orifice of the bent sleeve.

Adopt above-mentioned technical scheme, especially adopt the curved sheathed tube setting of cutter arbor cooperation of can bending, make the utility model discloses can bend into arbitrary crookedness according to various operation condition needs to satisfy the demand of all kinds of complicated operations.

Furthermore, the whole or part of the bendable cutter rod is a steel wire. And also can be high-strength metal such as titanium alloy wires, nickel alloy wires, cobalt alloy wires and the like.

Preferably, the first rotating shaft supporting part comprises a sleeve, a first rotating shaft and two first limiting parts, the sleeve is sleeved with the first rotating shaft, the first limiting parts are respectively fixed at two ends of the first rotating shaft, and the outer diameter of the sleeve is larger than that of the first limiting parts and is matched with the inner diameter of a pipe orifice of the bent sleeve. By adopting the technical scheme, the cutter has supporting force in the sheath, and the stability of the drill bit is enhanced.

Furthermore, the bendable cutter bar and the grinding head are respectively fixedly connected with the first limiting part.

Preferably, the first rotating shaft supporting piece comprises a first bearing, a second rotating shaft and two second limiting parts, the first bearing comprises a first outer ring, a first inner ring and a plurality of balls, the second rotating shaft is inserted into and fixedly connected with the first inner ring, the second limiting parts are respectively fixed at two ends of the second rotating shaft, the outer diameter of the second limiting parts is smaller than that of the first outer ring of the first bearing, and the bendable cutter bar and the grinding head are respectively and fixedly connected with the second limiting parts.

Preferably, the first rotating shaft supporting part is a second bearing, the second bearing comprises a second outer ring, a second inner ring and a plurality of balls, and the second inner ring is sleeved and fixed on the bendable cutter rod.

Preferably, the tool further comprises a second rotating shaft support, and the second rotating shaft support is arranged on the bendable tool bar and close to the connecting position of the bendable tool bar and the tool handle. By adopting the technical scheme, the stability of the drill bit can be further enhanced.

Furthermore, the second rotating shaft supporting part is a third bearing, the third bearing comprises a third outer ring, a third inner ring and a plurality of balls, and the third inner ring is sleeved and fixed on the bendable cutter rod in a penetrating manner.

Preferably, the sheath connecting portion and the handle connecting portion are arranged in a ladder shape, the outer diameter of the sheath connecting portion is larger than that of the handle connecting portion, the axial length of the handle connecting portion is smaller than that of the handle connector, a hollow pipeline matched with the handle in shape is axially arranged at the axis of the handle connecting portion, and the handle is inserted into the hollow pipeline.

Preferably, the handle connecting part is provided with a water filling port. By adopting the technical scheme, the high temperature generated by the drill bit in the operation process can be reduced by injecting water from the water injection port, so that the safety of the drill bit is ensured.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 is a schematic view of the structure of the assembly of the cutter and the sheath of the present invention;

fig. 2 is an assembled perspective view of the assembly tool and sheath of the present invention;

FIG. 3 is a schematic view of the assembled components of the tool and handle of the present invention;

FIG. 4 is a schematic structural view of the components of the present invention;

FIG. 5 is a partial schematic view of the handle of the assembly of the present invention;

FIG. 6 is a schematic view of the first pivot support of the assembly of the present invention after disassembly;

fig. 7 is a schematic structural diagram of a preferred embodiment of the present invention;

wherein,

101 knife handle

102 bendable cutter bar

103a sleeve

103b a rotating shaft I

103c a limiting part I

104 grinding head

201 handle connector

202 bent sleeve

203 water filling nozzle

300 handle

301 sheath connection

302 handle of a knife connecting portion

Detailed Description

As shown in fig. 1, 2 and 3, the medical abrasive drilling head comprises a cutter, a sheath and a handle 300, wherein the cutter comprises a cutter handle 101, a bendable cutter rod 102, a first rotating shaft support and a grinding head 104 which are connected in sequence; the sheath comprises a handle connector 201 and a bent sleeve 202; the handle 300 includes a sheath connecting portion 301 and a handle connecting portion 302; the cutter is inserted into the sheath, the handle connector 201 is connected with the sheath connecting portion 301, the cutter handle 101 is connected with the cutter handle connecting portion 302, the grinding head 104 penetrates through the pipe orifice of the bent sleeve 202, and the first rotating shaft supporting piece is arranged at the pipe orifice of the bent sleeve 202.

The parts of the cutter can be connected by welding and the like. The bendable cutter bar 102 may be made of high-strength metal such as steel wire, titanium alloy wire, nickel alloy wire, cobalt alloy wire, etc., and can be bent at will while maintaining rigidity. The bendable knife bar 102 can be made of metal wire as a whole, or stainless steel knife bar as a whole, and the bendable metal wire is arranged locally. With regard to the first pivot support, which serves to ensure the support of the knife inside the sheath, the following embodiments can be used:

example one

As shown in fig. 6, the first rotating shaft support comprises a sleeve 103a, a first rotating shaft 103b and two first limiting parts 103 c; the sleeve 103a is sleeved with the first rotating shaft 103 b; the two first limiting parts 103c are respectively fixed at two ends of the first rotating shaft 103b, and the first limiting parts 103c can be cylindrical, pie-shaped or block-shaped and the like and are used for limiting the position of the sleeve 103a on the first rotating shaft 103 b; the structure of the first rotating shaft 103b and the first limiting part 103c is similar to an I shape, and the sleeve 103a is arranged in a recess in the middle of the I shape; the outer diameter of the sleeve 103a is larger than that of the first limiting part 103c and is matched with the inner diameter of the opening of the bent sleeve 202 of the sheath, so that the position of the cutter in the sheath is limited, when the drill bit operates, the cutter rotates at high speed, and the sleeve 103a can ensure that the grinding head 104 of the drill bit is not displaced in one direction when the rotating shaft 103b rotates at high speed in the sleeve 103 a.

As for the fixing position of the first rotary shaft support in the present embodiment, the following two schemes can be adopted:

the first scheme is as follows: the bendable cutter bar 102 and the grinding head 104 are respectively and fixedly connected with two limiting parts, namely a first rotating shaft supporting part is arranged between the bendable cutter bar 102 and the grinding head 104 and is connected with the two limiting parts, namely the first rotating shaft supporting part and the second rotating shaft supporting part.

Scheme II: the first rotating shaft 103b is directly an extension section of the bendable cutter bar 102, namely, the sleeve 103a is sleeved on the bendable cutter bar 102, the first limiting part 103c is fixed on the bendable cutter bar 102 and on two sides of the sleeve 103a, and the grinding head 104 is connected with the first limiting part 103c on one side or directly connected with the tail end of the bendable cutter bar 102.

Example two

The first rotating shaft supporting piece comprises a first bearing, a second rotating shaft and two second limiting parts, wherein the first bearing is mature in the prior art and can comprise a first outer ring, a first inner ring and a plurality of balls, the second rotating shaft is inserted into the first inner ring and fixedly connected with the first inner ring, the second limiting parts are respectively fixed at two ends of the second rotating shaft, the outer diameter of the second limiting parts is smaller than that of the first outer ring of the first bearing, the outer diameter of the first outer ring is matched with the inner diameter of a pipe opening of the bent sleeve 202, and the bendable cutter bar 102 and the grinding head 104 are respectively and fixedly connected with the second limiting parts.

EXAMPLE III

The first rotating shaft supporting part is a second bearing, the second bearing is in the prior art and can comprise a second outer ring, a second inner ring and a plurality of balls, the second inner ring is sleeved and fixed on the bendable cutter bar 102, the outer diameter of the second outer ring is matched with the inner diameter of the pipe orifice of the bent sleeve 202, and the tail end of the bendable cutter bar 102 is fixedly connected with the grinding head 104.

All the connection modes can adopt welding and other modes.

In another embodiment of the present invention, the tool further comprises a second pivot support, which is disposed on the bendable knife bar 102 near the connection with the knife handle 101. The support function of the cutter in the sheath is further improved by simultaneously limiting the two ends of the bendable cutter rod 102 in the bent sleeve 202, and the stability of the operation of the drill bit is enhanced. The second shaft support may take the same configuration as the first shaft support, for example: the second rotating shaft supporting part is a third bearing, the third bearing comprises a third outer ring, a third inner ring and a plurality of balls, the third inner ring is sleeved and fixed on the bendable cutter bar 102 in a penetrating mode, and the outer diameter of the third outer ring is matched with the inner diameter of the bent sleeve 202.

Handle 300 is prior art, for being applicable to the utility model discloses, takes off the shell of handle 300 head to in order to connect the utility model discloses a sheath and cutter. As shown in fig. 5, the handle 300 with the head shell removed includes a sheath connecting portion 301 and a handle connecting portion 302, the sheath connecting portion 301 and the handle connecting portion 302 are arranged in a step shape, the outer diameter of the sheath connecting portion 301 is larger than the outer diameter of the handle connecting portion 302, a hollow pipeline matched with the shape of the handle 101 is axially arranged at the axis of the handle connecting portion 302 and used for accommodating and fixing the handle 101, and a device for fixing and locking the handle 101 inside the handle 300 is known in the prior art and is not described herein. The sheath connecting portion 301 is provided with a thread structure, which facilitates connection of the handle connector 201 of the sheath.

The handle connector 201 of the sheath is fixedly connected with the bent sleeve 202, which is generally made of stainless steel, and can adopt welding and other modes or an integrated structure. The handle connector 201 is used for connecting a handle 300, and the bending sleeve 202 is used for protecting the bendable cutter bar 102 and plays a role in shaping and supporting the bendable cutter bar 102 when the cutter bar is bent. As shown in fig. 4, the handle connector 201 is cylindrical or hollow conical, and has a shape similar to or identical to the outer shell of the head of the handle 300, and the axial length of the handle connector 201 is greater than that of the handle connecting portion 302, so as to match and accommodate the sheath connecting portion 301 and the handle connecting portion 302. The handle connector 201 is provided with a corresponding thread structure at the end for connecting the sheath connecting part 301 of the handle 300. The other end of the bent sleeve 202 opposite to the handle connector 201 is opened as a nozzle. The bent sleeve 202 can be set into various models according to different bending degrees in practical application, and a clinician can select a sheath with the corresponding bending degree according to needs; tools such as pliers, benders, pipe benders, etc. may also be used to bend the curved cannula 202 to the desired angle, as desired. When the cutter is inserted into the sheath, the position of the bendable cutter bar 102 corresponds to the bent sleeve 202, the grinding head 104 penetrates through the opening of the bent sleeve 202, and the first rotating shaft support is arranged at the opening of the bent sleeve 202.

Fig. 7 shows one of the preferred embodiments of the present invention, since the temperature may be increased when the drill bit is operated, the present embodiment provides a water filling port 203 at the handle connecting portion 201, and the high temperature generated when the drill bit is operated can be reduced by injecting water into the water filling port 203.

The utility model discloses when in actual use, at first select the sheath of corresponding crookedness, insert the sheath with the cutter, insert handle of a knife connecting portion 302 and the locking handle of a knife 101 of handle 300 with handle of a knife 101, screw fixedly with the handle connector 201 and the sheath connecting portion 301 of sheath, the equipment finishes promptly. The sheath and the cutter are preferably disposable products, the bent sleeve 202 can be bent at will and can be discarded after use, and the device is safer and more convenient.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. Medical abrasive drilling drill bit, its characterized in that:

comprises a cutter, a sheath and a handle (300);

the tool comprises a tool handle (101), a bendable tool bar (102), a first rotating shaft support and a grinding head (104) which are connected in sequence;

the sheath comprises a handle connector (201) and a bent sleeve (202);

the handle (300) comprises a sheath connecting part (301) and a handle connecting part (302);

the cutting tool is inserted into the sheath, the handle connector (201) is connected with the sheath connecting portion (301), the handle (101) is connected with the handle connecting portion (302), the grinding head (104) penetrates out of the pipe orifice of the bent sleeve pipe (202), and the first rotating shaft supporting piece is arranged at the pipe orifice inner opening of the bent sleeve pipe (202).

2. The medical burr drill bit of claim 1, wherein: the whole or part of the bendable cutter bar (102) is a steel wire.

3. The medical burr drill bit of claim 1 or 2, characterized in that: the first rotating shaft supporting piece comprises a sleeve (103a), a first rotating shaft (103b) and two first limiting parts (103c), the sleeve (103a) is sleeved with the first rotating shaft (103b), the first limiting parts (103c) are respectively fixed at two ends of the first rotating shaft (103b), and the outer diameter of the sleeve (103a) is larger than that of the first limiting parts (103c) and is matched with the inner diameter of a pipe opening of the bent sleeve (202).

4. The medical burr drill bit of claim 3, wherein: the bendable cutter bar (102) and the grinding head (104) are fixedly connected with the first limiting part (103c) respectively.

5. The medical burr drill bit of claim 1 or 2, characterized in that: the first rotating shaft supporting piece comprises a first bearing, a second rotating shaft and two second limiting parts, the first bearing comprises a first outer ring, a first inner ring and a plurality of balls, the second rotating shaft penetrates through and is fixedly connected with the first inner ring, the second limiting parts are respectively fixed at two ends of the second rotating shaft, the outer diameters of the second limiting parts are smaller than those of the first outer ring of the first bearing, and the bendable cutter bar (102) and the grinding head (104) are respectively and fixedly connected with the second limiting parts.

6. The medical burr drill bit of claim 1 or 2, characterized in that: the first rotating shaft supporting part is a second bearing, the second bearing comprises a second outer ring, a second inner ring and a plurality of balls, and the second inner ring is sleeved and fixed on the bendable cutter rod (102).

7. The medical burr drill bit of claim 1 or 2, characterized in that: the tool further comprises a second rotating shaft supporting piece, and the second rotating shaft supporting piece is arranged on the bendable tool bar (102) and close to the connecting position of the bendable tool bar and the tool handle (101).

8. The medical burr drill bit of claim 7, wherein: the second rotating shaft supporting part is a third bearing, the third bearing comprises a third outer ring, a third inner ring and a plurality of balls, and the third inner ring is sleeved and fixed on the bendable cutter rod (102).

9. The medical burr drill bit of claim 1, 2, 4, or 8, wherein: sheath connecting portion (301) with handle of a knife connecting portion (302) are the echelonment setting, the external diameter of sheath connecting portion (301) is greater than the external diameter of handle of a knife connecting portion (302), the axial length of handle of a knife connecting portion (302) is less than the axial length of handle connector (201), the axle center department axial of handle of a knife connecting portion (302) be equipped with handle of a knife (101) shape assorted hollow pipeline, handle of a knife (101) insert in this hollow pipeline.

10. The medical burr drill bit of claim 1, 2, 4, or 8, wherein: the handle connector (201) is provided with a water filling port (203).