CN221331341U - Trephine holder and bone taking system - Google Patents

Abstract

The utility model discloses a trephine holder and a trephine taking system, which belong to the technical field of medical equipment, wherein the trephine holder is used for being matched with a trephine for taking bones, the trephine for taking bones comprises a hollow drill, the trephine holder comprises a holder main body, the front end of the holder main body is provided with a fixing hole for accommodating the hollow drill, the front part of the holder main body is sleeved with a slidable fixing block, the front part of the holder main body is also provided with a locking cap for pushing the fixing block to fix the hollow drill, and the rear part of the holder main body is used as a holding rod. The utility model can assist in pushing the bone column in the trephine to the bone grafting position, avoids the interference between the hand-held trephine mode and the operation position, and has high safety and convenient use.

Description

Trephine holder and bone taking system

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a trephine holder and a bone taking system.

Background

In surgical and orthopedic operations, it is often necessary to perform autogenous or allogeneic bone grafting when bone defects, orthopedics, osteonecrosis, or guiding bone growth are encountered; bone is generally harvested by using a bone knife or rongeur when harvesting autologous bone. These two ways have the following problems when taking bones: 1. the bone knife needs multiple types, is inconvenient to operate and is complex to take out bones; 2. complete regular bone pieces cannot be obtained.

In order to solve the above-mentioned problems, the prior art presents an annular bone extractor (also called trephine), however, since the upper end of the annular bone extractor is usually required to be connected with an external power device, the annular bone extractor is inconvenient to take out from the annular cavity after taking the annular bone block from the human body. For example, patent CN215534793U discloses a circular cutting bone taking device for femoral head necrosis, which is characterized in that an extrusion block and an extrusion push rod are arranged in a hollow drill bone sleeve, and a push ring is arranged outside the hollow drill bone sleeve, so that the bone post in the bone drill after taking bone is taken out. The utility model can ensure the integrity of the bone block/column, but has complex structure and inconvenient use.

For example, patent CN215129533U discloses an annular bone harvester, which is used for connecting a connecting part of a driving motor with a hollow annular cutting cylinder in a detachable manner, when taking out bones from the body, the connecting part is connected with the annular cutting cylinder, after the bone taking is completed, the connecting part is taken down from the annular cutting cylinder, and at the moment, the annular cutting cylinder can be held by hand to push out bone pieces/bone column tops in the annular cutting cylinder by using conventional instruments (such as ejector rods and the like). However, the hand-held method is inconvenient, and especially when the bone column in the circular cutting cylinder needs to be directly pushed to the bone grafting position, the hand-held method is easy to interfere with the operation position, and the safety is poor.

Disclosure of utility model

The utility model aims to solve the technical problem of providing a trephine holder and a bone taking system which can assist in pushing a bone column in a trephine to a bone grafting position and are high in safety.

In order to solve the technical problems, the utility model provides the following technical scheme:

In one aspect, a trephine holder is provided for cooperation with a trephine for bone removal, the trephine for bone removal comprising a core drill, the trephine holder comprising a holder body, wherein:

The front end of the holder main body is provided with a fixing hole for accommodating the hollow drill, the front part of the holder main body is sleeved with a slidable fixing block, the front part of the holder main body is also provided with a locking cap for pushing the fixing block to fix the hollow drill, and the rear part of the holder main body is used as a holding rod.

Further, the front part of the holder main body is provided with a thread section, the front part of the locking cap is axially fixed and circumferentially rotatably connected with the fixed block, and the rear part of the locking cap is in threaded connection with the thread section;

And/or the fixed block comprises a movable groove for accommodating the side wall of the fixed hole and a through hole for sleeving the holder main body, wherein the movable groove is communicated with the through hole, and the inner diameter of the through hole is larger than the outer diameter of the holder main body and smaller than the inner diameter of the fixed hole;

And/or a limit groove matched with the locking cap is formed in the fixing block along the circumferential direction;

And/or the side walls of the fixing holes and the opposite side walls of the fixing blocks are respectively provided with an arc-shaped clamping groove.

On the other hand, a bone taking system is provided, including getting the bone and using the trephine, get the bone and use the trephine to include hollow boring and be located hollow boring upper end detachable connection's quick change joint, get bone system still include foretell trephine holder.

Further, the bone taking system further comprises a bone taking device matched with the trephine for bone taking, the bone taking device comprises a push rod, a locking block used for locking and connecting the upper end of the hollow drill is arranged on the push rod, a threaded hole penetrating through the middle of the locking block is formed in the middle of the locking block, the push rod is in threaded connection with the threaded hole, and a knob is fixedly arranged at the upper end of the push rod.

Further, a top bone column is arranged at the lower end of the top rod, and the diameter of the top bone column is larger than that of the top rod and smaller than the inner diameter of the hollow drill;

And/or the lower end of the knob is provided with a counter bore, and the upper end of the ejector rod is inserted into the counter bore and fixed through a fixing pin.

Further, the inner side of the upper end of the hollow drill is provided with connecting blocks which are oppositely arranged;

The locking block comprises a driving part and an inserting part which is positioned below the driving part and used for being inserted into the hollow drill, and an L-shaped limiting groove which is used for being matched with the connecting block is formed in the inserting part.

Further, the upper end of the hollow drill is provided with a bulge, and the connecting block is positioned at the inner side of the bulge;

The side of the locking block is provided with a penetrating plunger mounting hole, a spring plunger is arranged in the plunger mounting hole, and a ball head of the spring plunger is used for abutting against the bottom wall of the bulge.

Further, the quick-change connector comprises a connecting main part for connecting an external power device, a limiting block which is positioned below the connecting main part and axially fixed and circumferentially rotatable, and an adjusting knob which is sleeved on the connecting main part and used for driving the limiting block to circumferentially rotate relative to the connecting main part;

The lower extreme of connecting the main part is protruding to be equipped with and is used for supporting the first portion of leaning on of hollow drill up end, the protruding second portion of leaning on that is used for leaning on the connecting block lower extreme face that is equipped with of lower extreme of stopper in can getting into the hollow drill and after the stopper rotation.

Further, the connecting main piece comprises a main body part, the first abutting part is positioned at the lower end of the main body part, and a driving part for connecting an external power device is arranged at the upper end of the main body part;

The lower end face of the first abutting part is provided with a plug-in part for being inserted into the hollow drill, and the plug-in part is provided with a avoidance groove for avoiding the connecting block.

Further, a counter bore is formed in the lower end of the main body part, and the limiting block is inserted into the counter bore;

the side of main part is equipped with the circumference fluting that is linked together with this counter bore, adjust knob and stopper are last with the corresponding position of circumference fluting is equipped with first spacing hole and second spacing hole respectively, wear to be equipped with spacing post in first spacing hole, circumference fluting and the second spacing hole, thereby will adjust knob, connection main part and stopper link together.

The utility model has the following beneficial effects:

The trephine holder is used for being matched with a trephine for taking bones, the trephine holder comprises a holder main body, a fixing hole for accommodating a hollow drill of the trephine for taking bones is formed in the front end of the holder main body, a slidable fixing block is sleeved on the front portion of the holder main body, a locking cap for pushing the fixing block to fix the hollow drill is further arranged on the front portion of the holder main body, and the rear portion of the holder main body is used as a holding rod. The utility model can assist in pushing the bone column in the trephine to the bone grafting position, avoids the interference between the hand-held trephine mode and the operation position, and has high safety and convenient use.

Drawings

FIG. 1 is a schematic view of the overall structure of a trephine holder of the present utility model, wherein (a) is a front view and (b) is A-A cross-sectional view;

FIG. 2 is a schematic view of the fixing block shown in FIG. 1, wherein (a) is a bottom view and (b) is a C-C sectional view;

FIG. 3 is a schematic view of the locking cap of FIG. 1, wherein (a) is a front view and (B) is a B-B cross-sectional view;

FIG. 4 is a schematic view of the holder body of FIG. 1, wherein (a) is a front view and (b) is a side view;

FIG. 5 is a schematic view showing the overall structure of an osteotome in the osteotomy system of the present utility model, wherein (a) is a front view and (b) is A-A cross-sectional view;

FIG. 6 is a schematic view of the knob of FIG. 5, wherein (a) is a bottom view and (b) is a C-C cross-sectional view;

FIG. 7 is a schematic view of the ejector pin of FIG. 5;

FIG. 8 is a schematic view of the locking block of FIG. 5, wherein (a) is a front view and (b) is a left side view;

FIG. 9 is a schematic view showing the overall structure of a trephine for bone removal in a bone removal system of the present utility model, wherein (a) is a front view and (B) is a B-B cross-sectional view;

FIG. 10 is a schematic view of the connecting main part of FIG. 9, wherein (a) is a front view, (B) is a B-B cross-sectional view, (C) is a bottom view of (a), and (d) is a C-C cross-sectional view;

FIG. 11 is a schematic view of the spring plunger of FIG. 9;

FIG. 12 is a schematic view of the stopper post of FIG. 9;

FIG. 13 is a schematic view of the adjustment knob of FIG. 9, wherein (a) is a front view and (b) is A-A cross-sectional view;

FIG. 14 is a schematic view of the stopper of FIG. 9, wherein (a) is a front view and (b) is a cross-sectional view taken from A-A;

FIG. 15 is a schematic view of the core drill of FIG. 9, wherein (a) is a front view and (b) is A-A cross-sectional view;

FIG. 16 is a schematic view of the structure of a protective drill sleeve in the bone extraction system of the present utility model, wherein (a) is a front view and (b) is A-A cross-sectional view;

Fig. 17 is a schematic structural view of a drill in the bone extraction system of the present utility model.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In one aspect, the present utility model provides a trephine holder 3, as shown in fig. 1-17, for cooperation with a trephine 1 for bone removal, the trephine 1 for bone removal comprising a core drill 11, the trephine 1 for bone removal further comprising a quick-change coupling 12 detachably connected to an upper end of the core drill 11, the trephine holder 3 comprising a holder body 31, wherein:

The front end of the holder body 31 is provided with a fixing hole 310 for accommodating the core drill 11, the front part of the holder body 31 is sleeved with a slidable fixing block 32, the front part of the holder body 31 is also provided with a locking cap 33 for pushing the fixing block 32 to fix the core drill 11, and the rear part of the holder body 31 is used as a holding rod 311.

When in use, after the trephine 1 for taking bones is taken from the body, the quick-change connector 12 is detached from the upper end of the hollow drill 11, the hollow drill 11 passes through the fixing hole 310 at the front end of the trephine holder 3 holder main body 31, the locking cap 33 is driven, the fixing block 32 is driven to move forward to fix the hollow drill 11 in the fixing hole 310, the holding rod 311 at the rear part of the holder main body 31 is held, the hollow drill 11 is aligned to a bone grafting position (such as a pre-drilled bone grafting hole with the same size), and a bone column in the hollow drill 11 is pushed to the bone grafting position by using a conventional instrument (such as a push rod and the like).

The trephine holder is used for being matched with a trephine for taking bones, the trephine holder comprises a holder main body, a fixing hole for accommodating a hollow drill of the trephine for taking bones is formed in the front end of the holder main body, a slidable fixing block is sleeved on the front portion of the holder main body, a locking cap for pushing the fixing block to fix the hollow drill is further arranged on the front portion of the holder main body, the rear portion of the holder main body is used as a holding rod, when the trephine holder is used, the locking cap is driven to drive the fixing block to move forwards, the hollow drill of the trephine for taking bones can be fixed in the fixing hole, then the holding rod at the rear portion of the holder main body is held by hand, the hollow drill is aligned to a bone grafting position, and a bone column in the hollow drill can be pushed to the bone grafting position by conventional instruments (such as a push rod and the like). The utility model can assist in pushing the bone column in the trephine to the bone grafting position, avoids the interference between the hand-held trephine mode and the operation position, and has high safety and convenient use.

In particular, as shown in fig. 2, the fixed block 32 may include a movable groove 321 for receiving a sidewall of the fixed hole 310 and a through hole 322 for being sleeved on the holder body 31, the movable groove 321 being in communication with the through hole 322, the through hole 322 having an inner diameter larger than an outer diameter of the holder body 31 and smaller than an inner diameter of the fixed hole 310.

The manner in which the locking cap 33 pushes the fixing block 32 may be various manners that can be easily considered by those skilled in the art, such as that the two directly abut against and push, etc., however, in order to improve the stability of the fixing block 32, the following manner is preferably adopted:

As shown in fig. 1 to 4, the front part of the holder main body 31 is provided with a screw thread section 312, and the front part of the locking cap 33 is axially fixed, circumferentially rotatable, to the connection fixing block 32, and the rear part of the locking cap 33 is screw-coupled to the screw thread section 312.

In specific implementation, the outer surface of the side wall of the through hole 322 of the fixed block 32 may be provided with an annular limiting groove 323, the front portion of the locking cap 33 is provided with a stepped hole 331, the side wall of the stepped hole 331 is provided with a limiting hole 332, the limiting hole 332 is internally provided with a limiting column 34, and the tail end of the limiting column 34 extends into the limiting groove 323 to realize the front portion of the locking cap 33 is axially fixed and circumferentially rotatable to be connected with the fixed block 32. Also, the rear part of the locking cap 33 may be provided with a screw hole 333 that mates with the screw section 312 of the holder body 31; the outer surface of the locking cap 33 may be provided with a slip prevention groove 334 to facilitate rotation.

Thus, in use, by rotating the locking cap 33, the locking cap 33 moves along the threaded section 312 of the holder body 31, and the fixing block 32 is pushed forward, thereby clamping and fixing the core drill 11 in the fixing hole 310 of the holder body 31.

To enhance the securement of the core drill 11, arcuate clamping grooves 35 may be provided on opposite side walls of the securing holes 310 and securing blocks 32.

In another aspect, the present utility model provides a bone harvesting system, which comprises a bone harvesting trephine 1, as shown in fig. 9-15, wherein the bone harvesting trephine 1 comprises a hollow drill 11 and a quick-change connector 12 detachably connected to the upper end of the hollow drill 11, and the bone harvesting system further comprises the trephine holder 3. Since the structure of the trephine holder 3 is the same as above, a detailed description thereof will be omitted.

In the bone taking system, the trephine holder is matched with the trephine for taking bones, the trephine holder comprises a holder main body, the front end of the holder main body is provided with a fixing hole for accommodating a hollow drill of the trephine for taking bones, the front part of the holder main body is sleeved with a slidable fixing block, the front part of the holder main body is also provided with a locking cap for pushing the fixing block to fix the hollow drill, and the rear part of the holder main body is used as a holding rod. The utility model can assist in pushing the bone column in the trephine to the bone grafting position, avoids the interference between the hand-held trephine mode and the operation position, and has high safety and convenient use.

The inventor finds that in the research process, for the annular bone extractor disclosed in the utility model patent CN215129533U, after the bone extraction from the body is completed, the connecting part is required to be removed from the annular cutting cylinder, and at the moment, the bone blocks in the annular cutting cylinder can be pushed and extracted by using a conventional instrument (such as a push rod and the like). However, the way of pushing and taking out the bone blocks in the circular cutting cylinder by using the push rod is too simple and violent, and the bone blocks/bone columns are easy to damage. To solve the problem, the utility model is improved as follows:

As shown in fig. 5-8, the bone harvesting system further comprises a bone harvesting device 2 matched with the trephine 1 for harvesting bones, the bone harvesting device 2 comprises a push rod 21, a locking block 22 used for locking and connecting with the upper end of the hollow drill 11 is arranged on the push rod 21, a threaded hole 220 penetrating through the middle of the locking block 22 is arranged, the push rod 21 is in threaded connection with the threaded hole 220, and a knob 23 is fixedly arranged at the upper end of the push rod 21.

When the bone taking trephine 1 is used, after taking bones from the body, the quick-change connector 12 is detached from the upper end of the hollow drill 11, the locking block 22 of the bone taking device 2 is connected to the upper end of the hollow drill 11 in a locking manner, then the knob 23 is rotated, the ejector rod 21 is driven to gradually push the bone column in the hollow drill 11 forwards along the threaded hole 220 in the middle of the locking block 22, and then the complete bone column is taken out from the hollow drill 11 or the bone column is directly pushed to a bone grafting position (such as a pre-drilled bone grafting hole with the same size).

The bone taking device is used for being matched with a trephine for taking bones, the bone taking device comprises a push rod, a locking block used for locking and connecting the upper end of a hollow drill of the trephine for taking bones is arranged on the push rod, a threaded hole penetrating through the middle of the locking block is formed in the middle of the locking block, the push rod is in threaded connection with the threaded hole, and a knob is fixedly arranged at the upper end of the push rod, so that when the bone taking device is used, the push rod can be driven to gradually push a bone column in the hollow drill forwards along the threaded hole in the middle of the locking block by rotating the knob, and then the complete bone column is taken out from the hollow drill. The utility model has even and slow force application, is easy to take out the bone column from the trephine, and can avoid damaging the bone column.

As shown in fig. 5 to 6, in order to facilitate the firm connection between the knob 23 and the push rod 21, a counter bore 231 may be provided at the lower end of the knob 23, and the upper end of the push rod 21 is inserted into the counter bore 231 and fixed by a fixing pin 232 (233 is a pin hole for passing through the fixing pin 232 in the drawing).

As shown in fig. 7, the lower end of the mandrel 21 may be provided with a bone prop 211, and the diameter of the bone prop 211 is preferably larger than the diameter of the mandrel 21 and smaller than the inner diameter of the core drill 11, so that the bone prop 211 is relatively large in size and is easier to push out from the trephine.

The connection between the locking block 22 and the core drill 11 may take various forms, such as a threaded connection, which will be readily apparent to those skilled in the art, however, for ease of implementation, as shown in fig. 8 and 15, the following is preferred:

the inner side of the upper end of the hollow drill 11 is provided with a connecting block 111 which is arranged oppositely;

The locking block 22 includes a driving part 221 and an insertion part 222 below the driving part 221 for insertion into the core drill 11, and an L-shaped limiting groove 223 for cooperation with the connection block 111 is provided on the insertion part 222.

When in use, the connecting block 111 of the core drill 11 is aligned, the insertion part 222 of the locking block 22 is inserted into the core drill 11, the connecting block 111 is made to enter the limiting groove 223 of the locking block 22, and the driving part 221 of the locking block 22 is rotated to clamp and fix the locking block 22 (i.e. the bone extractor 2) on the core drill 11.

As shown in fig. 15, in order to enhance the connection strength of the core drill 11 with the bone extractor 2 and the quick change coupler 12, the upper end of the core drill 11 may be provided with a bulge 110, and the connection block 111 is located inside the bulge 110. The radial distance between the connection blocks 111 is preferably equal to or greater than the diameter of the core drill 11 (i.e., the through holes 115) so that the core drill 11 maintains a hollow passage of a larger diameter so as not to interfere with subsequent removal of bone pieces/pillars therefrom. As shown in fig. 5 and 8, the side surface of the locking block 22 may be provided with a through plunger mounting hole 224, and a spring plunger 24 is provided in the plunger mounting hole 224, and a ball of the spring plunger 24 is used to abut against the bottom wall of the bulge 110, so that the connection firmness between the locking block 22/bone extractor 2 and the core drill 11 is improved.

The detachable connection between the quick-change coupling 12 and the core drill 11 can also take place in various ways, such as a threaded connection, which will be readily apparent to a person skilled in the art, however, for ease of implementation, the following is preferred:

As shown in fig. 9 to 15, the quick-change coupler 12 includes a connection main member 121 for connecting an external power device, a stopper 122 axially fixed and circumferentially rotatable below the connection main member 121, and an adjusting knob 123 sleeved on the connection main member 121 for driving the stopper 122 to rotate circumferentially relative to the connection main member 121;

The lower end of the connection main member 121 is convexly provided with a first abutting portion 1211 for abutting against the upper end face of the core drill 11, and the lower end of the stopper 122 is convexly provided with a second abutting portion 1221 capable of entering into the core drill 11 and for abutting against the lower end face of the connection block 111 after the stopper 122 rotates.

During operation, the quick-change connector 12 is connected to the upper end of the core drill 11 in advance, specifically, the quick-change connector 12 is adjusted to enable the second abutting portion 1221 at the lower end of the limiting block 122 to enter the core drill 11 and pass through the connecting block 111, meanwhile, the first abutting portion 1211 at the lower end of the connecting main piece 121 abuts against the upper end face of the core drill 11, then the adjusting knob 123 is rotated to drive the limiting block 122 to rotate circumferentially relative to the connecting main piece 121, and the second abutting portion 1221 at the lower end of the limiting block 122 abuts against the lower end face of the connecting block 111, so that the quick-change connector 12 can be clamped at the upper end of the core drill 11. In the operation process, the patient is anesthetized firstly, an opening is formed at a position where the patient needs to take out bone, then a connecting main part 121 of the quick-change connector 12 is connected with an external power device (such as an electric drill, etc.), then the trephine is placed at the position where the bone is taken out, the trephine is rotated to slowly push the trephine to take out bone (taking out the whole autologous bone at the position where the bone is taken out), after the bone is taken out, the quick-change connector 12 is detached from the upper end of the hollow trephine 11 by reversely rotating the adjusting knob 123, and the bone pieces/bone tops in the hollow trephine 11 are pushed out by the bone taking device 2 or are directly pushed to the bone grafting position.

This get trephine for bone, including the hollow drill and be located the quick change joint that the connection can be dismantled to the hollow drill upper end, the upper end inboard of hollow drill is equipped with the connecting block that sets up relatively, the quick change joint is including connecting the main part, stopper and adjust knob, the protruding first portion that leans on that is used for leaning on of lower extreme of connecting the main part that is equipped with of lower extreme of connecting the main part, the protruding second portion that leans on that is used for leaning on the connecting block lower extreme after can getting into the hollow drill and rotating the stopper that is used for in the stopper, when using like this, can connect quick change joint at the hollow drill upper end through rotating adjust knob, conveniently drive the trephine through external power device and get the bone, get the bone after, can rotate adjust knob again and tear quick change joint, utilize the aforesaid to get bone piece top in the hollow drill and take out. Therefore, the trephine for taking out the bone has the advantages of simple structure, convenient use, convenient taking out of the bone block, convenient disinfection and repeated use and low cost.

The lower end of the core drill 11 may be provided with a cutting edge 112 to facilitate the rotation of the bone from the body.

As shown in fig. 10, in order to facilitate various functions of the connection main member 121, it is preferable that the connection main member 121 includes a main body portion 1210, a first abutting portion 1211 is located at a lower end of the main body portion 1210, and a driving portion 1212 for connecting an external power device is provided at an upper end of the main body portion 1210. The driving part 1212 may have a triangular structure, which is convenient to connect with an external power device.

In order to improve the connection firmness between the quick-change coupler 12 and the core drill 11, the lower end surface of the first abutting portion 1211 of the connecting main member 121 may be provided with a plug portion 1213 for being inserted into the core drill 11, and the plug portion 1213 is provided with a relief groove 1214 for relieving the connecting block 111. The outer side of the lower end of the insertion portion 1213 may be provided with an inclined surface 1215 so as to guide the insertion portion 1213 to be inserted into the core drill 11.

In order to realize that the limiting block 122 is axially fixed and circumferentially rotatably connected below the connecting main member 121, and the adjusting knob 123 can drive the limiting block 122 to circumferentially rotate, various modes which can be easily thought by those skilled in the art can be adopted, however, for convenient implementation, the following structural form is preferably adopted:

9-15, a counter bore 1216 is arranged at the lower end of the main body 1210 of the connecting main piece 121, and the limiting block 122 is inserted into the counter bore 1216;

The side of the main body 1210 is provided with a circumferential slot 1217 communicated with the counter bore 1216, the positions, corresponding to the circumferential slot 1217, of the adjusting knob 123 and the limiting block 122 are respectively provided with a first limiting hole 1232 and a second limiting hole 1222, and the limiting posts 124 penetrate through the first limiting hole 1232, the circumferential slot 1217 and the second limiting hole 1222, so that the adjusting knob 123, the connecting main part 121 and the limiting block 122 are connected together.

In this way, when the adjusting knob 123 is turned, the limiting block 122 is driven to rotate, so that the quick-change connector 12 can be connected with the core drill 11, wherein the limiting column 124 can rotate in the circumferential slot 1217 of the connecting main part 121. The angular size of the circumferential slot 1217 may be flexibly set as desired, for example, a 90-degree slot as shown in fig. 10 (d).

The upper portion of the main body 1210 may be provided with a radially penetrating plunger hole 1218, a spring plunger 125 is disposed (specifically, may be screwed) in the plunger hole 1218, and the adjusting knob 123 is provided with a plunger groove 1231 that is matched with a ball head of the spring plunger 125. When in use, after the adjusting knob 123 is rotated, the ball head of the spring plunger 125 is clamped in the plunger groove 1231 to provide limit for the adjusting knob 123.

As shown in fig. 16, the bone extraction system of the present utility model may further include a protective drill sleeve 4, and the protective drill sleeve 4 may include an outer sleeve 41 and a handle 42 located at an upper end side surface (specifically, may be welded) of the outer sleeve 41, and an open circuit device 43, a primary sleeve 44 for being engaged with the drill bit 5 (see fig. 17), and a secondary sleeve 45 for being engaged with the core drill 11 are sequentially provided in the outer sleeve 41 from inside to outside. Wherein, the handle 42 can be bent upwards to facilitate holding; the outer diameter of the bottom of the outer sleeve 41 may be tapered to reduce tissue irritation; the primary sleeve 44 and the secondary sleeve 45 may be socket-fitted.

Thus, when the bone is removed by the bone removing trephine 1, the surgical site can be protected by the protective drill sleeve 4 (combined with the secondary sleeve 45); when a bone grafting hole is required to be drilled at the bone grafting position, the protection drill sleeve 4 (combined with the primary sleeve 44) can be used for protecting the operation part; the protective drill sleeve 4 (in combination with the open circuit 43) may be used to protect the surgical site when an open circuit at the surgical site is desired.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims (10)

1. A trephine holder for cooperation with a trephine for bone removal, the trephine for bone removal comprising a core drill, the trephine holder comprising a holder body, wherein:

The front end of the holder main body is provided with a fixing hole for accommodating the hollow drill, the front part of the holder main body is sleeved with a slidable fixing block, the front part of the holder main body is also provided with a locking cap for pushing the fixing block to fix the hollow drill, and the rear part of the holder main body is used as a holding rod.

2. The trephine holder of claim 1, wherein a front portion of said holder body is provided with a threaded section, a front portion of said locking cap being axially fixed, circumferentially rotatable, to said fixed block, a rear portion of said locking cap being threadedly connected to said threaded section;

And/or the fixed block comprises a movable groove for accommodating the side wall of the fixed hole and a through hole for sleeving the holder main body, wherein the movable groove is communicated with the through hole, and the inner diameter of the through hole is larger than the outer diameter of the holder main body and smaller than the inner diameter of the fixed hole;

And/or a limit groove matched with the locking cap is formed in the fixing block along the circumferential direction;

And/or the side walls of the fixing holes and the opposite side walls of the fixing blocks are respectively provided with an arc-shaped clamping groove.

3. A bone harvesting system comprising a bone harvesting trephine comprising a core drill and a quick-change connector removably connected to the upper end of the core drill, wherein the bone harvesting system further comprises a trephine holder according to claim 1 or 2.

4. The bone harvesting system according to claim 3, further comprising a bone harvesting device matched with the trephine for harvesting bone, wherein the bone harvesting device comprises a push rod, a locking block used for locking and connecting the upper end of the hollow drill is arranged on the push rod, a threaded hole penetrating through the middle of the locking block is formed, the push rod is in threaded connection with the threaded hole, and a knob is fixedly arranged at the upper end of the push rod.

5. The bone extraction system of claim 4, wherein a lower end of the ejector rod is provided with an ejector pin, the ejector pin having a diameter greater than the diameter of the ejector rod and less than the inner diameter of the core drill;

And/or the lower end of the knob is provided with a counter bore, and the upper end of the ejector rod is inserted into the counter bore and fixed through a fixing pin.

6. The bone extraction system of claim 4, wherein the inner side of the upper end of the core drill is provided with oppositely arranged connecting blocks;

The locking block comprises a driving part and an inserting part which is positioned below the driving part and used for being inserted into the hollow drill, and an L-shaped limiting groove which is used for being matched with the connecting block is formed in the inserting part.

7. The bone extraction system of claim 6, wherein the upper end of the core drill is provided with a bulge, and the connecting block is positioned on the inner side of the bulge;

The side of the locking block is provided with a penetrating plunger mounting hole, a spring plunger is arranged in the plunger mounting hole, and a ball head of the spring plunger is used for abutting against the bottom wall of the bulge.

8. The bone harvesting system of claim 6, wherein the quick-change coupler comprises a connecting main part for connecting an external power device, an axially fixed, circumferentially rotatable stop block positioned below the connecting main part, and an adjusting knob sleeved on the connecting main part for driving the stop block to rotate circumferentially relative to the connecting main part;

The lower extreme of connecting the main part is protruding to be equipped with and is used for supporting the first portion of leaning on of hollow drill up end, the protruding second portion of leaning on that is used for leaning on the connecting block lower extreme face that is equipped with of lower extreme of stopper in can getting into the hollow drill and after the stopper rotation.

9. The bone extraction system of claim 8, wherein the connecting main member includes a main body portion, the first abutment portion is located at a lower end of the main body portion, and a driving portion for connecting an external power device is provided at an upper end of the main body portion;

The lower end face of the first abutting part is provided with a plug-in part for being inserted into the hollow drill, and the plug-in part is provided with a avoidance groove for avoiding the connecting block.

10. The bone extraction system of claim 9, wherein a counterbore is provided at a lower end of the body portion, the stopper being inserted into the counterbore;

the side of main part is equipped with the circumference fluting that is linked together with this counter bore, adjust knob and stopper are last with the corresponding position of circumference fluting is equipped with first spacing hole and second spacing hole respectively, wear to be equipped with spacing post in first spacing hole, circumference fluting and the second spacing hole, thereby will adjust knob, connection main part and stopper link together.