CN213465207U - Medical abrasive drill bit - Google Patents

Abstract

The utility model provides a medical abrasive drilling drill bit, including handle of a knife, cutter body and bistrique, its characterized in that: the knife handle is a regular triangular prism. Adopt this technical scheme, change into regular triangular prism shape with the traditional cylinder shape of handle of a knife, utilize the structure of the three sides of regular triangular prism and three crest lines, increased the resistance point and the setpoint of medical abrasive drilling clamping part for medical abrasive drilling drill bit is difficult for taking place radial slippage, thereby has strengthened stability and security.

Description

Medical abrasive drill bit

Technical Field

The utility model relates to a medical instrument, especially a medical abrasive drilling drill bit of medical abrasive drilling is exclusively used in.

Background

In modern clinical medicine, medical abrasive drills are widely used in various surgeries, such as orthopedics, spinal surgery, brain surgery, oral and maxillofacial surgery, plastic surgery and the like, in which bone tissues, soft tissues and the like need to be cut or ground. In particular, in the otolaryngological surgery, due to the narrow and profound physiological characteristics of the otolaryngological canal, the requirement on the length of the drill bit of the medical grinding drill is complex, and the doctor is often required to continuously replace the drill bit with a proper length to complete the surgery, so that the operability of the surgery becomes complicated, the surgery completion time is prolonged, and the pain of the patient is increased. In addition, the design of common drill bit stalk portion is mostly cylindrical, and the drill bit can take place axial or radial slip in the in-process of high-speed rotation unavoidably to also cause certain damage to the inside bearing of medical abrasive drilling, and then influenced medical abrasive drilling's life, and in case the drill bit takes place to drop or shift, very easily harm the patient.

Therefore, those skilled in the art have been devoted to developing a medical abrasive drill bit that is less likely to fall off and is safer.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects in the prior art, the technical problem to be solved in the present invention is to provide an anti-slip medical abrasive drilling bit.

In order to achieve the above object, the utility model provides a medical abrasive drilling drill bit, including handle of a knife, cutter body and bistrique, its characterized in that: the knife handle is a regular triangular prism.

Adopt this technical scheme, change into regular triangular prism shape with the traditional cylinder shape of handle of a knife, utilize the structure of the three sides of regular triangular prism and three crest lines, increased the resistance point and the setpoint of medical abrasive drilling clamping part for medical abrasive drilling drill bit is difficult for taking place radial slippage, thereby has strengthened stability and security.

Preferably, three ridge lines of the tool handle are all round corners, and the radiuses of the round corners are the same and equal to the radius of the tool body. The technical scheme can be replaced by a drill bit with a cylindrical handle disclosed in the prior art, and the stability of the medical abrasive drilling drill bit is further improved.

Preferably, the tool shank is provided with at least one group of clamping grooves along the circumferential direction of the tool shank, and the clamping grooves are formed in three ridge lines of the tool shank. By adopting the technical scheme, the medical abrasive drilling bit can be prevented from axially moving on one hand, and on the other hand, when more than two groups of clamping grooves are arranged, the length of the drill bit exposed out of the abrasive drilling can be controlled by selecting different clamping groove positions, so that the step of replacing the drill bits with different lengths is omitted, the operation process is simplified, and the operation efficiency is improved.

Further, the clamping groove is a semicircular groove.

Preferably, the card slots are 3 groups.

Preferably, the cutter body is provided with at least one laser mark, the number of the laser marks is equal to the number of the groups of the clamping grooves, and the positions of the laser marks correspond to the positions of the clamping grooves one to one. This technical scheme is through setting up the laser marking, and the person of facilitating the use knows the drill bit on the one hand and whether installs and target in place, and on the other hand is when setting up two above laser markings, because the position of laser marking and draw-in groove position one-to-one for the user controls the drill bit more accurately and exposes the length of abrasive drilling.

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 structural view of a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view of a universal medical burr clamping portion;

FIG. 3 is a cross-sectional view of a universal medical burr holder;

FIG. 4 is a partial view of the clamp of the universal medical burr;

FIG. 5 is a partial structure view of the utility model with the bottom of the knife handle as the view angle;

FIG. 6 is a schematic view of a partial structure of a preferred embodiment of the present invention;

FIG. 7 is a sectional view of the internal structure of a medical burr according to a preferred embodiment of the present invention;

FIG. 8 is a cross-sectional view of the clamping assembly;

FIG. 9 is a cross-sectional view of the medical burr bit insertion gripping assembly;

FIG. 10 is a schematic structural view of the inner shell;

FIG. 11 is a cross-sectional view of the locking screw cap;

FIG. 12 is a schematic view of the construction of the locking screw cap;

FIG. 13 is a cross-sectional view of the inner shell in combination with the locking screw cap;

wherein the content of the first and second substances,

100 handle

101 card slot

200 cutter body

201 laser marking

300 grinding head

401 guide casing

402 locking spiral cover

402a ball limiting groove

402b positioning groove

402c positioning platform

403 base

404 inner casing

404a guide housing interface

404b base interface

404c ball through groove

404d locating pin

405 clamping assembly

405a opening

405b ball track

405c clamping assembly spring

405d bearing

405e positioning steel ball

405f positioning card slot

405g pressing plate

406 ball bearing

Detailed Description

As shown in fig. 1, the medical abrasive drilling head includes a tool shank 100, a tool body 200, and a grinding head 300, the tool shank 100 being connected to the tool body 200, and the tool body 200 being connected to the grinding head 300. The medical abrasive drilling bit can adopt an integral structure, and can also adopt known modes such as welding and the like to connect all parts.

The utility model discloses can use all bistrique types that are applicable to medical abrasive drilling that prior art has disclosed, the shape that the position is connected with bistrique 300 to the cutter body 200 is done corresponding adjustment according to bistrique 300's different grade type and shape simultaneously. As for the circular grinding head shown in fig. 1, the portion of the cutter body 200 connected to the grinding head 300 may take the shape of a circular truncated cone, and the end having a short diameter is connected to the grinding head 300.

The tool shank 100 takes the shape of a regular prism. Compare with general cylinder handle of a knife among the prior art, because regular triangular prism has three side and three crest lines, increased the resistance point and the setpoint of medical abrasive drilling centre gripping position, specifically do: taking a medical abrasive drill commonly used in clinic as an example, as shown in fig. 2-4, a clamping part of the medical abrasive drill is a tubular structure provided with three slits along the axial direction, and the drill is fixed by pressurizing the clamping part, reducing the size of the slits and contracting the inner diameter of the tubular structure. When the medical abrasive drill bit is assembled with the medical abrasive drill, the three ridge lines of the drill bit are clamped into the three cracks of the clamping part of the medical abrasive drill, the clamping of the crack parts to the ridge lines is further enhanced through pressurizing the clamping part, the resistance of the drill bit on the radial motion path inside the abrasive drill is increased, and the positioning and reinforcing effects are achieved.

Fig. 5 shows another embodiment of the present invention, in this embodiment, the knife handle 100 is a regular triangular prism with round corners, that is, three ridge lines of the knife handle 100 are round corners, the radius of each round corner is the same and equal to the radius of the knife body 200, in this embodiment, the knife body 200 is a cylinder. Regular triangular prism accessible of taking the fillet in this embodiment cuts out three rectangle side after keeping three arc surface with the cylinder and forms. The round angle structure can replace the drill bit of a cylinder handle commonly used in clinic, and simultaneously, the anti-slip and anti-displacement functions of the medical abrasive drilling drill bit are further improved.

In another preferred embodiment, the tool holder 100 is provided with at least one set of slots 101 along the circumferential direction thereof, as shown in fig. 6, the slots 101 are provided on three edge lines of the regular triangular prism, that is, 3 slots 101 are provided, and each slot 101 has the same shape and is located at the same position on the three edge lines. The shape of the clamping groove 101 is adjusted correspondingly according to the shape of the clamping part of the medical abrasive drill, and can be a semicircular groove. The group number of the clamping grooves 101 is set according to actual needs, for example, 2-3 groups, when a plurality of groups of clamping grooves 101 are arranged, the length of the drill bit can be adjusted by fixing different groups of clamping grooves 101, so that the requirements of different depth operation positions are met.

The utility model discloses a better embodiment is: the knife handle 100 is a regular triangular prism with a round corner, the knife handle 100 is provided with a clamping groove 101, and the embodiment that the clamping groove 101 is a semicircular groove needs to be adapted to a special medical abrasive drill, as shown in fig. 7, the medical abrasive drill comprises a guide outer shell 401, a locking spiral cover 402, a base 403, an inner shell 404, a clamping assembly 405 and two balls 406. The inner shell 404 is sleeved outside the clamping assembly 405, the locking screw cap 402 is sleeved outside part of the inner shell 404, two ends of the inner shell 404 are respectively in threaded connection with the base 403 and the guide outer shell 401, and the locking screw cap 402 is positioned between the base 403 and the guide outer shell 401.

The guide outer shell 401, the locking screw cap 402, the inner shell 404 and the clamping component 405 are all hollow pipeline structures. The guiding outer shell 401 is conical, the end with a small diameter is an outer opening, which is a drill bit insertion opening, the end with a large diameter is connected with the locking screw cap 402, and the inner wall of the guiding outer shell is provided with an inner thread connected with the inner shell 404. The guide housing 401 functions to protect and fix the cutter body 200 seated therein.

The clamp assembly 405 includes an inner tube portion and a shell portion, the shell portion is fitted over the inner tube portion, and an opening portion 405a, a positioning member, a ball rail 405b, a clamp assembly spring 405c, and a bearing 405d are provided. As shown in fig. 8 and 9, the clamping assembly 405 is divided into an inner part and an outer part, the inner pipe is provided with a hollow pipe, and the shape of the hollow pipe is matched with the handle 100 of the medical abrasive drilling bit and is a regular triangular prism with a round angle. The opening 405a is provided at one end of the inner tube portion, and the drill shank 100 is inserted therethrough. Ball tracks 405b are provided on the exterior surface of the shell portion in a semi-circular groove circumferentially encircling the shell portion, the radius of the groove matching that of ball 406 for ball 406 to travel along ball tracks 405 b. The clamping assembly spring 405c is sleeved between the inner tube portion and the shell portion. The bearing 405d is provided at the distal end of the clamp assembly 405 and is connected to the base 403. The positioning part is arranged at the end of the shell part, which is connected with the shell part, and surrounds the inner pipe part along the circumferential direction. The positioning component is composed of three groups of same structures, and each group of structures respectively corresponds to one group of clamping grooves 101 of the tool handle 100, namely the positions of three ridge lines on the regular triangular prism. Each set of structure includes a steel positioning ball 405e, a positioning slot 405f, and a pressure plate 405 g. The positioning clamping groove 405f is a barrel-shaped hollow groove with an upper opening and a lower opening, the upper opening is positioned on the outer surface of the inner pipe part, the lower opening is positioned on the inner wall of the inner pipe part, the positioning steel ball 405e is contained in the groove, the diameters of the upper opening and the lower opening are smaller than the diameter of the positioning steel ball 405e, and the diameter of the positioning steel ball 405e is matched with the clamping groove 101; the pressing plate 405g is connected to the housing portion and covers the upper opening of the positioning card slot 405 f. When the shell part and the inner tube part are separated towards two ends, the pressing plate 405g is driven to leave the positioning clamping groove 405f, so that the positioning steel ball 405e is separated from the pressing of the pressing plate 405g, and part of the positioning steel ball is exposed out of the upper opening of the positioning clamping groove 405f, so that the pressing of the positioning steel ball 405e on the lower opening of the positioning clamping groove 405f is released, the medical abrasive drill is in an unlocking state at the moment, a medical abrasive drill bit can be installed, after the drill bit is inserted into the clamping assembly 405, the pulling force of the shell part and the inner tube part is released, the shell part and the inner tube part return to the initial position under the action of the rebound force of the spring 405c of the clamping assembly, the pressing plate 405g presses the positioning steel ball 405e, the lower part of the positioning steel ball 405e is exposed out of the lower opening.

Fig. 10 shows a structural diagram of the inner shell 404, and as shown in the figure, both ends of the inner shell 404 are provided with external threads, one end with a smaller diameter is a guide outer shell interface 404a, and the other end is a base interface 404b, which are respectively connected with the guide outer shell 401 and the base 403. The inner shell 404 is provided with two opposite obliquely extending ball through grooves 404c along the circumferential direction, the oblique angle of the ball through groove 404c is 5-15 degrees, the two oblique angles are through grooves with large ends and small middle, the two ends are circular grooves, the diameter of the circular groove is slightly larger than that of the ball 406, and the ball through groove 404c is used for providing a running track for the ball 406. A locating pin 404d is disposed between each of the two ball slots 404 c.

Fig. 11 and 12 show the internal structure of the locking screw cap 402, as shown, the locking screw cap 402 has a thickened inner wall, and two opposite ball limiting grooves 402a are axially formed along the inner wall, the ball limiting grooves 402a are semicircular grooves, the radius of the grooves is slightly larger than that of the balls 406, and the ball limiting grooves 402a are used for limiting the running path of the balls 406. A positioning groove 402b and a positioning platform 402c connected with the positioning groove 402b are respectively arranged between the two ball limiting grooves 402a, the positioning platform 402c is radially arranged along the inner wall of the locking screw cap 402, the height of the positioning platform 402c is lower than the thickened part of the inner wall of the locking screw cap 402 and is in a step shape with the thickened part of the inner wall, the end head at one end of the positioning platform 402c is the positioning groove 402b, the positioning groove 402b is axially arranged along the inner wall of the locking screw cap 402 and is vertical to the positioning platform 402c, the bottom of the positioning groove 402b is lower than the positioning platform 402c and is a semicircular groove, and the radius of the semicircular groove is slightly larger than that. Fig. 13 shows a state when the locking screw cap 402 is combined with the inner housing 404, as shown in the figure, the locking screw cap 402 is sleeved outside a part of the inner housing 404, a spring 404e is sleeved between the locking screw cap 402 and the inner housing 404, when the spring 404e is not elastically deformed, the positioning pin 404d is located at the bottom of the positioning groove 402b, the medical drill bit is in a locked state, at this time, the medical drill bit cannot be inserted or pulled out, when the locking screw cap 402 is pressed and rotated, the positioning pin 404d leaves the bottom of the positioning groove 402b and moves to the positioning platform 402c, at this time, the medical drill bit is in an unlocked state, and the medical drill bit can be inserted or pulled.

In the medical abrasive drilling tool in the assembled state, the two balls 406 are respectively located in the two ball limiting grooves 402a, the two ball through grooves 404c and the ball tracks 405b, and since the ball limiting grooves 402a and the ball tracks 405b are both semicircular grooves, the ball through grooves 402a are through holes, and when the ball limiting grooves 402a and the ball tracks 405b are combined, the ball through grooves are circular concave holes, and the balls 406 can be just accommodated. When the medical drill bit is installed, the locking screw cap 402 is pressed towards the base 403, so that the positioning pin 404d on the inner shell 404 leaves the bottom of the positioning groove 402b on the locking screw cap 402, then the locking screw cap 402 is rotated, so that the positioning pin 404d moves to the positioning platform 402c on the locking screw cap 402, in the process, the locking screw cap 402 is pressed and rotated to drive the ball 406 to roll in the ball limiting groove 402a, the ball through groove 404c and the ball track 405b, due to the oblique arrangement of the ball through groove 404c, when the ball 406 moves from the large angle position, namely the high position of the oblique groove, to the low position, namely the low position of the oblique groove, along the ball through groove 404c, the shell part of the clamping assembly 405 is driven to move towards the base 403 by the movement of the ball 406 in the ball track 405b, so that the shell part is separated from the inner tube part, and the positioning steel ball 405e releases the pressing of the lower opening of, at this time, the unlocking state is obtained, the medical drill bit can be inserted and pulled out, and the length of the drill bit exposed out of the outer opening of the guide shell 401 can be adjusted. After the operation of the medical drill bit is finished, the locking screw cap 402 is rotated in the opposite direction, and meanwhile, under the action of the spring 404e and the rebound force of the clamping assembly spring 405c, the positioning pin 404d moves back to the bottom of the positioning groove 402b from the positioning platform 402c, the pressing plate 405g covers the upper opening of the positioning clamping groove 405f and presses the positioning steel ball 405e, so that the positioning steel ball 405e restores the pressing of the lower opening of the positioning clamping groove 405f, and the locking state is obtained at this moment.

After the special medical abrasive drill is used in the embodiment, the positioning part of the clamping assembly 405 and the clamping assembly spring 405c are driven to interact by the tight fit of the locking screw cap 402, the inner shell 404 and the clamping assembly 405 and the running of the ball 406 among the ball limiting groove 402a, the ball through groove 404c and the ball track 405b, and the pressure of the clamping groove 101 is applied and released, so that the fixing and the adjustment of the knife handle 100 are realized. The advantages of this embodiment are: by adopting the drill handle 100 with the clamping groove 101, a doctor can reasonably select the position of the clamping groove 101 to control the length of the medical abrasive drill bit exposed out of the medical abrasive drill according to different focus positions in the actual use process, so that the cutting/polishing treatment of bone tissues and soft tissues is speeded up and facilitated, and the operation efficiency is improved; meanwhile, the regular triangular prism structure with the fillet enables the medical abrasive drilling drill bit to be more firmly installed, the anti-falling effect is further enhanced, the drill bit is prevented from being damaged by the internal bearing of the medical abrasive drilling due to axial or radial sliding in the high-speed rotating process, and the damage rate of the bearing is reduced.

In another preferred embodiment of the present invention, the cutter body 200 is further provided with at least one laser mark 201, and the laser mark 201 radially surrounds the circle along the cutter body 200 and is formed by laser marking. The number of the laser marks 201 is equal to the number of the groups of the clamping grooves 101, and the positions of the laser marks 201 correspond to the positions of the clamping grooves 101 one by one, namely when the drill bit of the medical abrasive drilling machine is inserted into the medical abrasive drilling machine, and the positioning steel ball 405e is clamped into one group of the clamping grooves 101, the laser marks 201 corresponding to the group of the clamping grooves 101 are just positioned at the outer opening of the guide shell 401, so that an operator can determine that the drill bit is installed in place. When more than two laser marks 201 are arranged, the length of the medical abrasive drilling drill exposed out of the outer opening of the guide shell 401 can be adjusted as required by setting the distance between two adjacent laser marks 201, for example, the conventional arrangement of the medical abrasive drilling drill specially used for the ENT department operation is as follows: the distance between the outermost edge of the grinding head 300 and the first laser mark 201 closest to the grinding head 300 is set to be 15mm, and the distance between two adjacent laser marks 201 is set to be 5 mm.

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 (7)

1. Medical abrasive drilling drill bit, including handle of a knife (100), cutter body (200) and bistrique (300), its characterized in that: the knife handle (100) is a regular triangular prism.

2. The medical burr drill bit of claim 1, wherein: three ridge lines of the knife handle (100) are all round corners, and the radiuses of the round corners are the same and equal to the radius of the knife body (200).

3. The medical burr drill bit of claim 1 or 2, characterized in that: the tool handle is characterized in that at least one group of clamping grooves (101) are formed in the tool handle (100) along the circumferential direction of the tool handle, and the clamping grooves (101) are formed in three ridge lines of the tool handle (100).

4. The medical burr drill bit of claim 3, wherein: the clamping groove (101) is a semicircular groove.

5. The medical burr drill bit of claim 3, wherein: the card slots (101) are 3 groups.

6. The medical burr drill bit of claim 3, wherein: the cutter body (200) is provided with at least one laser mark (201), the number of the laser marks (201) is equal to the number of the groups of the clamping grooves (101), and the positions of the laser marks (201) correspond to the positions of the clamping grooves (101) one by one.

7. The medical burr drill bit of claim 4 or 5, characterized in that: the cutter body (200) is provided with at least one laser mark (201), the number of the laser marks (201) is equal to the number of the groups of the clamping grooves (101), and the positions of the laser marks (201) correspond to the positions of the clamping grooves (101) one by one.

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