CN109875641A - A kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation - Google Patents
A kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation Download PDFInfo
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- CN109875641A CN109875641A CN201910259768.3A CN201910259768A CN109875641A CN 109875641 A CN109875641 A CN 109875641A CN 201910259768 A CN201910259768 A CN 201910259768A CN 109875641 A CN109875641 A CN 109875641A
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Abstract
The invention discloses a kind of Mirco-traumatic skull drills of improved neurosurgery clinical operation, including skull drilling device main body and set on the handle of skull drilling device bottom part body, rotation chamber is equipped with inside the left end of the skull drilling device main body, the rotation is intracavitary to be fixedly installed with motor, is fixedly installed with shaft on the output shaft of motor.The Mirco-traumatic skull drill of the improved neurosurgery clinical operation, when drill bit generates biggish vibration with skull during boring cranium, drill bit can carry out buffering activity, it can make drill bit that there is good pooling feature, it can prevent drill bit during boring cranium due to vibrating risk excessive and that bone split occurs, avoid the generation of security risk, and quick disassembling, assembling and replacing is carried out to drill bit convenient for people, alleviate the work difficulty that medical worker dismounts drill bit, the more firm of fixation is installed after bit change-over simultaneously, it is ensured that the subsequent safe handling of drill bit.
Description
Technical field
The present invention relates to the minimally invasive of the field of medical instrument technology more particularly to a kind of improved neurosurgery clinical operation
Skull drilling device.
Background technique
Neurosurgery is to cure mainly the disease of the nervous systems such as the brain as caused by wound, spinal cord, such as cerebral hemorrhage bleeding
Threat to life is measured, traffic accident causes brain wound or brain to have oncothlipsis to need operative treatment etc..
In neurosurgery clinical position, for quick diagnosis and treatment, is often done to patient and bore cranium operation, currently, boring
Cranium operation has a flat sharp structure, spiral bit structure etc. using the nose-cut-ting edge of drill bit, drill bit using when without being cut with blade
Mouthful, scalp directly, which is punctured, with the tip of flat pointed portion directly carries out positioning and drilling on skull, simple, convenient, wound
Hurt small, it can be achieved that rapid drilling, saves patients ' lives to greatest extent.
And the cranium drill bit in existing Mirco-traumatic skull drill is all fixedly mounted in Mirco-traumatic skull drill, once drill bit damages
It is bad, or when replacement drill bit size, dismounting is inconvenient, and brings work difficulty, and existing neurosurgery to medical worker
The Mirco-traumatic skull drill of clinical operation, drill bit do not have the function of buffering, easily lead to if vibration is excessive during boring cranium
The risk of bone split, easily brings security risk.
Summary of the invention
Technical problems based on background technology, the invention proposes a kind of improved neurosurgery clinical operations
Mirco-traumatic skull drill.
A kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation proposed by the present invention, including skull drilling device main body with
And the handle set on skull drilling device bottom part body, the left end inside of the skull drilling device main body are equipped with rotation chamber, the rotation is intracavitary solid
Dingan County is equipped with motor, and shaft is fixedly installed on the output shaft of motor, and the left end rotation of the shaft is through to skull drilling device main body
Outside and be welded with buffing pad, the buffing pad is equipped with buffer gear, and buffing pad is movably installed with by buffer gear
Mounting base, the mounting base is equipped with installing mechanism, and mounting base is mounted with drill bit by installing mechanism, the drill bit
Left end is specially spiral bit structure；
The buffer gear includes the cushion chamber on buffing pad, is movably installed with movable plate in the cushion chamber, institute
State and be fixedly connected on the left of movable plate there are two motion bar disposed in parallel, and the left end of two motion bars slide be through to it is slow
The outside of red seat is simultaneously fixedly connected with mounting base, buffer spring one is fixedly connected between the buffing pad and mounting base, and slow
Spring one is rushed between two motion bars, is also fixedly connected with and is set on motion bar between the buffing pad and mounting base
Buffer spring two is equipped with multiple buffering elastic circles, the side of the buffering elastic circle and activity in the cushion chamber on the right side of movable plate
Plate is fixedly connected, and the other side of buffering elastic circle is fixedly connected with the right side inner wall of cushion chamber；
The installing mechanism includes the rectangle mounting groove on the left of mounting base, and the right end of the drill bit is fixedly welded with square
Shape mounting post, and rectangle mounting post is movably installed in rectangle mounting groove, the mounting base above rectangle mounting groove is equipped with
Cavity is slidably fitted with movable block in the cavity, and the bottom of the movable block is fixedly welded with fixture block, the rectangle mounting post
It is equipped with fixing groove, and the bottom of fixture block is movably arranged in fixing groove, the top inner wall of the cavity is equipped with threaded hole, screw thread
Hole internal screw thread is connected with screw rod, and the bottom end of screw rod extend in cavity and with abutted at the top of movable block, the screw rod
Top extend to the outside of mounting base and be fixedly connected with knob, be respectively equipped with and be obliquely installed in the cavity of screw rod two sides
Tension spring, and the top of tension spring is fixedly connected with the top inner wall of cavity, is fixedly connected at the top of the bottom end of tension spring and movable block.
Preferably, the left end surface of the drill bit is equipped with graduated scale, and the slide outside of the drill bit is arranged restraining position ring block,
The top of the stop collar is equipped with limited block, and limited block and stop collar have been connected through a screw thread an adjusting fastening bolt, and
The bottom end for adjusting fastening bolt, which sequentially passes through limited block and stop collar and matches with drill bit, to be locked.
Preferably, two tension springs are integrally in " V "-shape structure.
Preferably, the two sides of the movable block are equipped with sliding block, sliding slot are equipped on the two sides inner wall of the cavity, and sliding
Block is slidably connected with sliding slot.
Preferably, be fixedly connected with buffer spring three between the two sides inner wall of the buffering elastic circle, and buffer spring three with
Motion bar is arranged in parallel.
Preferably, the two sides of the movable plate roll and are equipped with ball, are equipped on the two sides inner wall of the cushion chamber
Spherical guide slot, and the side of ball extends in spherical guide slot and is slidably connected with the inner wall of spherical guide slot.
Preferably, the inner left wall of the rotation chamber is equipped with mounting hole, is fixedly installed with ball bearing in mounting hole, and
Shaft is rotatablely installed on ball bearing.
Preferably, trigger is additionally provided on the handle, the bottom of the handle is provided with battery case, sets in battery case
There is battery, the side of the battery case is provided with charging interface, the battery electrical connection charging interface and trigger, institute
State trigger electrical connection motor.
The beneficial effects of the present invention are:
1, in the present invention, when drill bit generates biggish vibration with skull during boring cranium, drill bit can be buffered
Activity can discharge a part of vibration by the deformation of buffer spring one and buffer spring two, and at the same time, drill bit also passes through
By the deformation of buffering elastic circle and buffer spring three, drill bit can be further offset at work to vibration caused by skull,
Finally, so that the drill bit in the present invention has good pooling feature, it can prevent drill bit during boring cranium due to vibration
Risk excessive and that bone split occurs, avoids the generation of security risk.
2, in the present invention, by the cooperation of knob, screw rod, tension spring, movable block, fixture block, fixing groove, convenient for people to drill bit
Quick disassembling, assembling and replacing is carried out, and the more firm of fixation is installed after bit change-over, therefore, in the present invention, once bit damage,
When either needing replacing drill bit size, the dismounting of drill bit is very convenient, medical worker can be mitigated and dismount drill bit
Work difficulty.
In conclusion the Mirco-traumatic skull drill of the improved neurosurgery clinical operation, when drill bit during boring cranium with
When skull generates biggish vibration, drill bit can carry out buffering activity, and drill bit can be made to have good pooling feature, can be to prevent
Only drill bit avoids the generation of security risk, Er Qiebian due to vibrating risk excessive and that bone split occurs during boring cranium
Quick disassembling, assembling and replacing is carried out to drill bit in people, alleviates the work difficulty that medical worker dismounts drill bit, while bit change-over
Installation fixation is more firm afterwards, it is ensured that the subsequent safe handling of drill bit.
Detailed description of the invention
Fig. 1 is a kind of structural representation of the Mirco-traumatic skull drill of improved neurosurgery clinical operation proposed by the present invention
Figure；
Fig. 2 is the structural schematic diagram of buffer gear detail in the present invention；
Fig. 3 is the structural schematic diagram of installing mechanism detail in the present invention；
Fig. 4 is the attachment structure schematic diagram of buffering elastic circle and buffer spring three in the present invention；
Fig. 5 is the attachment structure schematic diagram between limited block in the present invention, stop collar and adjusting fastening bolt.
In figure: 1 skull drilling device main body, 2 buffing pads, 201 cushion chambers, 202 motion bars, 203 movable plates, 204 buffering elastic circles,
205 buffer springs three, 206 buffer springs one, 207 buffer springs two, 208 balls, 209 spherical guide slots, 3 mounting bases, 301 squares
Shape mounting groove, 302 rectangle mounting posts, 303 fixing grooves, 304 fixture blocks, 305 knobs, 306 screw rods, 307 movable blocks, 308 tension springs,
309 cavitys, 310 threaded holes, 4 drill bits, 5 graduated scales, 6 limited blocks, 7 stop collars, 8 rotation chambers, 9 motors, 10 shafts, 11 ball axis
It holds, 12 handles, 13 triggers, 14 battery cases, 15 batteries, 16 charging interfaces, 17 adjusting fastening bolts.
Specific embodiment
Combined with specific embodiments below the present invention is made further to explain.
Embodiment
With reference to Fig. 1-5, a kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation is proposed in the present embodiment, is wrapped
Skull drilling device main body 1 and the handle 12 set on 1 bottom of skull drilling device main body are included, rotation chamber is equipped with inside the left end of skull drilling device main body 1
8, it rotates in chamber 8 and is fixedly installed with motor 9, shaft 10 is fixedly installed on the output shaft of motor 9, the left end rotation of shaft 10 is passed through
It wears to the outside of skull drilling device main body 1 and is welded with buffing pad 2, buffing pad 2 is equipped with buffer gear, and buffing pad 2 passes through buffering
Mechanism is movably installed with mounting base 3, and mounting base 3 is equipped with installing mechanism, and mounting base 3 is mounted with brill by installing mechanism
First 4, the left end of drill bit 4 is specially spiral bit structure；
Buffer gear includes the cushion chamber 201 on buffing pad 2, is movably installed with movable plate 203 in cushion chamber 201,
The left side of movable plate 203 is fixedly connected there are two motion bar 202 disposed in parallel, and the left end of two motion bars 202 is slided
It is through to the outside of buffing pad 2 and is fixedly connected with mounting base 3, be fixedly connected with buffer spring between buffing pad 2 and mounting base 3
One 206, and buffer spring 1 is set between two motion bars 202, and set is also fixedly connected between buffing pad 2 and mounting base 3
The buffer spring 2 207 being located on motion bar 202 is equipped with multiple buffering elastic circles in the cushion chamber 201 on 203 right side of movable plate
204, the side of buffering elastic circle 204 is fixedly connected with movable plate 203, the other side of buffering elastic circle 204 and the right side of cushion chamber 201
Inner wall is fixedly connected；
Installing mechanism includes the rectangle mounting groove 301 set on 3 left side of mounting base, and the right end of drill bit 4 is fixedly welded with rectangle
Mounting post 302, and rectangle mounting post 302 is movably installed in rectangle mounting groove 301, the peace above rectangle mounting groove 301
It fills seat 3 and is equipped with cavity 309, be slidably fitted with movable block 307 in cavity 309, the bottom of movable block 307 is fixedly welded with fixture block
304, rectangle mounting post 302 is equipped with fixing groove 303, and the bottom of fixture block 304 is movably arranged in fixing groove 303, cavity 309
Top inner wall is equipped with threaded hole 310, and 310 internal screw thread of threaded hole is connected with screw rod 306, and the bottom end of screw rod 306 extends to sky
It is abutted in chamber 309 and with the top of movable block 307, the top of screw rod 306 extends to the outside of mounting base 3 and is fixedly connected
There is knob 305, the tension spring 308 being obliquely installed, and the top of tension spring 308 are respectively equipped in the cavity 309 of 306 two sides of screw rod
It is fixedly connected with the top inner wall of cavity 309, the bottom end of tension spring 308 is fixedly connected with the top of movable block 307；The improved mind
Mirco-traumatic skull drill through surgical clinical operation, when drill bit 4 generates biggish vibration with skull during boring cranium, drill bit 4
Buffering activity can be carried out, makes drill bit 4 that there is good pooling feature, can prevent drill bit 4 during boring cranium due to vibration
Risk excessive and that bone split occurs is moved, avoids the generation of security risk, and quickly dismounted to drill bit 4 convenient for people
Replacement alleviates the work difficulty that medical worker dismounts drill bit 4, while installing the more firm of fixation after the replacement of drill bit 4, it is ensured that
The subsequent safe handling of drill bit 4.
Specifically, the left end surface of drill bit 4 is equipped with graduated scale 5, using graduated scale 5 for measuring brill required for drill bit 4
The depth of cranium；The slide outside of drill bit 4 is arranged restraining position ring block 7, and the top of stop collar 7 is equipped with limited block 6, and limited block 6 and limit
Position ring 7 has been connected through a screw thread an adjusting fastening bolt 17, and the bottom end for adjusting fastening bolt 17 sequentially passes through 6 He of limited block
Stop collar 7 and matching with drill bit 4 is locked；After being measured by graduated scale 5 to the depth for boring cranium required for drill bit 4,
And the adjusting by adjusting fastening bolt 17, the position that the adjusting of limited block 6 is fixed on brill cranium depth required for drill bit 4 is limited
Position, when subsequent drill bit 4 in the process of work, can with limited block 6 to required for drill bit 4 bore cranium depth limit, with
Just people are reminded to stop working drill bit 4.
Specifically, two tension springs 308 are whole is in " V "-shape structure；The two sides of movable block 307 are equipped with sliding block, cavity 309
Two sides inner wall on be equipped with sliding slot, and sliding block is slidably connected with sliding slot.
Specifically, buffer spring 3 205, and buffer spring three are fixedly connected between the two sides inner wall of buffering elastic circle 204
205 are arranged in parallel with motion bar 202；The two sides of movable plate 203, which roll, is equipped with ball 208, the two sides inner wall of cushion chamber 201
On be equipped with spherical guide slot 209, and the side of ball 208 extend in spherical guide slot 209 and with spherical guide slot 209
Inner wall is slidably connected；The inner left wall for rotating chamber 8 is equipped with mounting hole, ball bearing 11 is fixedly installed in mounting hole, and turn
Axis 10 is rotatablely installed on ball bearing 11；Trigger 13 is additionally provided on handle 12, the bottom of handle 12 is provided with battery case
14, battery case 14 is interior to be equipped with battery 15, and the side of battery case 14 is provided with charging interface 16, and battery 15 is electrically connected charging
Mouth 16 and trigger 13, trigger 13 are electrically connected motor 9.
In the present embodiment, when in use, when drill bit 4 generates biggish vibration with skull during boring cranium, drill bit 4 can
To carry out buffering activity, drill bit 4 can squeeze buffer spring 1 and buffer spring 2 207 by mounting base 3, in this way by slow
The deformation of spring 1 and buffer spring 2 207 is rushed, a part of vibration can be discharged, at the same time, drill bit 4 also passes through installation
3 Compressive activities bars 202 of seat, motion bar 202 squeezes buffering elastic circle 204 further through movable plate 203, when buffering elastic circle 204 is squeezed
Buffer spring 3 205 is also compressed, passes through the deformation of buffering elastic circle 204 and buffer spring 3 205 in this way, can further offset brill
First 4 at work to vibration caused by skull, finally, can be with so that drill bit 4 in the present invention has good pooling feature
Prevent drill bit 4 from, due to vibrating risk excessive and that bone split occurs, avoiding the generation of security risk during boring cranium.
In the present embodiment, once drill bit 4 damages, or when needing replacing 4 size of drill bit, to the dismounting right and wrong of drill bit 4
It is often convenient, when can mitigate medical worker and dismount the work difficulty of drill bit 4, such as need replacing drill bit 4, pass through knob 305
The upward helical rotation of screw rod 306 is driven, after screw rod 306 moves up, tension spring 308 can reset, and draw by the pulling force of tension spring 308
Dynamic movable block 307 and fixture block 304 move up, and then fixture block 304 can be made to move away out of fixing groove 303, then logical
Crossing drill bit 4 pulls rectangle mounting post 302 that can take out out of rectangle mounting groove 301；Then the drill bit 4 that will be needed replacing again
It takes back, and the rectangle mounting post 302 that the drill bit 4 is connected is put into rectangle mounting groove 301, then pass through 305 band of knob
The dynamic downward helical rotation of screw rod 306, screw rod 306 also drive movable block 307 and fixture block 304 to moving down during moving down
It is dynamic, and then fixture block 304 can be made to be assembled in fixing groove 303 and fixed, and tension spring 308 can also be stretched, energy
Enough so that the more fastening of screw rod 306 and 310 threaded engagement of threaded hole, may insure to install fixation more after drill bit 4 is replaced in this way
It is firm；Therefore, the dismounting of drill bit 4 is very convenient in the present invention, alleviates the work difficulty that medical worker dismounts drill bit 4.It needs
Illustrate, different size of drill bit 4, and the rectangle installation that different size of drill bit 4 is connected can be replaced in the present invention
The size of column 302 is all same size, facilitates the subsequent different size of drill bit 4 of people and replaces.
In conclusion the Mirco-traumatic skull drill of the improved neurosurgery clinical operation, when drill bit 4 during boring cranium with
When skull generates biggish vibration, drill bit 4 can carry out buffering activity, and drill bit 4 can be made to have good pooling feature, can be with
Prevent drill bit 4 from, due to the risk excessive and that bone split occurs of vibration, avoiding the generation of security risk during boring cranium, and
Quick disassembling, assembling and replacing is carried out to drill bit 4 convenient for people, alleviates the work difficulty that medical worker dismounts drill bit 4, while drill bit 4
The more firm of fixation is installed, it is ensured that the subsequent safe handling of drill bit 4 after replacement.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation, including skull drilling device main body (1) and it is set to and bores cranium
The handle (12) of device main body (1) bottom, which is characterized in that rotation chamber (8) is equipped with inside the left end of the skull drilling device main body (1),
It is fixedly installed with motor (9) in the rotation chamber (8), shaft (10), the shaft is fixedly installed on the output shaft of motor (9)
(10) left end rotation is through to the outside of skull drilling device main body (1) and is welded with buffing pad (2), and the buffing pad (2) is equipped with
Buffer gear, and buffing pad (2) is movably installed with mounting base (3) by buffer gear, the mounting base (3) is equipped with fitting machine
Structure, and mounting base (3) is mounted with drill bit (4) by installing mechanism, the left end of the drill bit (4) is specially spiral bit knot
Structure；
The buffer gear includes the cushion chamber (201) on buffing pad (2), is movably installed in the cushion chamber (201)
Movable plate (203), is fixedly connected with that there are two motion bar disposed in parallel (202), and two work on the left of the movable plate (203)
The left end of lever (202) is slided the outside for being through to buffing pad (2) and is fixedly connected with mounting base (3), the buffing pad (2)
Buffer spring one (206) is fixedly connected between mounting base (3), and buffer spring one (206) is set to two motion bars (202)
Between, the buffer spring two being set on motion bar (202) is also fixedly connected between the buffing pad (2) and mounting base (3)
(207), it is located in the cushion chamber (201) on the right side of movable plate (203) and is equipped with multiple buffering elastic circles (204), the buffering elastic circle
(204) side is fixedly connected with movable plate (203), the other side of buffering elastic circle (204) and the right side inner wall of cushion chamber (201)
It is fixedly connected；
The installing mechanism includes the rectangle mounting groove (301) on the left of mounting base (3), and the right end of the drill bit (4) is fixed
It is welded with rectangle mounting post (302), and rectangle mounting post (302) is movably installed in rectangle mounting groove (301), is located at rectangle and pacifies
Mounting base (3) above tankage (301) is equipped with cavity (309), is slidably fitted with movable block (307) in the cavity (309),
The bottom of the movable block (307) is fixedly welded with fixture block (304), and the rectangle mounting post (302) is equipped with fixing groove
(303), and the bottom of fixture block (304) is movably arranged in fixing groove (303), and the top inner wall of the cavity (309) is equipped with spiral shell
Pit (310), threaded hole (310) internal screw thread are connected with screw rod (306), and the bottom end of screw rod (306) extends in cavity (309)
And with abutted at the top of movable block (307), the top of the screw rod (306) extends to outside and the fixation of mounting base (3)
Knob (305) are connected with, is located in the cavity (309) of screw rod (306) two sides and is respectively equipped with the tension spring (308) being obliquely installed, and
The top of tension spring (308) is fixedly connected with the top inner wall of cavity (309), the bottom end of tension spring (308) and the top of movable block (307)
Portion is fixedly connected.
2. a kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation according to claim 1, which is characterized in that
The left end surface of the drill bit (4) is equipped with graduated scale (5), and the slide outside of the drill bit (4) is arranged restraining position ring block (7), institute
The top for stating stop collar (7) is equipped with limited block (6), and limited block (6) and stop collar (7) have been connected through a screw thread one and have adjusted tightly
Fixing bolt (17), and adjust fastening bolt (17) bottom end sequentially pass through limited block (6) and stop collar (7) and with drill bit (4) phase
Lock fixation.
3. a kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation according to claim 1, which is characterized in that
Two tension springs (308) are integrally in " V "-shape structure.
4. a kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation according to claim 1, which is characterized in that
The two sides of the movable block (307) are equipped with sliding block, are equipped with sliding slot on the two sides inner wall of the cavity (309), and sliding block with
Sliding slot is slidably connected.
5. a kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation according to claim 1, which is characterized in that
Be fixedly connected with buffer spring three (205) between the two sides inner wall of the buffering elastic circle (204), and buffer spring three (205) with
Motion bar (202) is arranged in parallel.
6. a kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation according to claim 1, which is characterized in that
The two sides of the movable plate (203), which roll, to be equipped with ball (208), is equipped on the two sides inner wall of the cushion chamber (201)
Spherical guide slot (209), and the side of ball (208) extend in spherical guide slot (209) and with spherical guide slot (209)
Inner wall is slidably connected.
7. a kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation according to claim 1, which is characterized in that
The inner left wall of rotation chamber (8) is equipped with mounting hole, is fixedly installed with ball bearing (11) in mounting hole, and shaft (10)
It is rotatablely installed on ball bearing (11).
8. a kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation according to claim 1, which is characterized in that
It is additionally provided with trigger (13) on the handle (12), the bottom of the handle (12) is provided with battery case (14), battery case
(14) battery (15) are equipped in, the side of the battery case (14) is provided with charging interface (16), battery (15) electricity
Charging interface (16) and trigger (13) are connected, the trigger (13) is electrically connected motor (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910259768.3A CN109875641A (en) | 2019-04-02 | 2019-04-02 | A kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910259768.3A CN109875641A (en) | 2019-04-02 | 2019-04-02 | A kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation |
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| Publication Number | Publication Date |
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| CN109875641A true CN109875641A (en) | 2019-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910259768.3A Pending CN109875641A (en) | 2019-04-02 | 2019-04-02 | A kind of Mirco-traumatic skull drill of improved neurosurgery clinical operation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111975040A (en) * | 2020-07-14 | 2020-11-24 | 浙江广汇金属材料有限公司 | Electric drill with drill bit convenient to replace and using method |
-
2019
- 2019-04-02 CN CN201910259768.3A patent/CN109875641A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111975040A (en) * | 2020-07-14 | 2020-11-24 | 浙江广汇金属材料有限公司 | Electric drill with drill bit convenient to replace and using method |
| CN111975040B (en) * | 2020-07-14 | 2022-07-12 | 浙江广汇金属材料有限公司 | Electric drill with drill bit convenient to replace and using method |
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