CN201079422Y - Electric craniotome drill with depth-limiting safety device - Google Patents

Abstract

The utility model discloses an electric craniotomy drill with a depth limiting safety device. The utility model consists of a drill head 1, a shell 2, a drill head locking nut 3, a soft shaft connecting bolt 4, a soft shaft 5, and a miniature low-speed motor 6. The utility model is characterized in that two symmetrical horizontal supporting feet 7 are arranged on the lower part of the shell 2, a screw cylinder 8 is arranged on the middle of a rail connecting the two horizontal supporting feet 7; the shell 2 rotates in the screw cylinder 8, a horizontal positioning ring 9 is arranged on the outer wall of the shell 2 on the lower side of the screw cylinder 8, and a depth limiting positioning ring 11 is arranged on the outer wall of the shell 2 on the upper side of the screw cylinder 8. The electric craniotomy drill with the depth limiting safety device is added with a depth limiting device on the front end of the shell of the electric rill, and the drill inletting is screwed in by screw threads, so that the electric craniotomy drill not only has the advantages that the drill inletting is quick, the eyelet is small, time and labor can be saved; but also the drilled depth can be controlled accurately, the drilling speed can be self-regulated, the drill enters stably, and the usage is safer.

Description

The electronic drill for craniotomy of the dark safety device of band limit

Technical field

This utility model relates to a kind of cerebral surgery operation apparatus, specifically a kind of electronic drill for craniotomy with the dark safety device of limit.

Background technology

At present, hospital is when carrying out cerebral surgery operation, need open cranium with brill, employed drill for craniotomy mainly contains two kinds of hand-rail type drill for craniotomy and electronic drill for craniotomys, because hand-rail type drill for craniotomy vibratility is little, danger is little, cost is low, so use comparatively extensive, but exist speed slow, waste time and energy, deficiency that operative doctor is tired easily, and in hand process, need two hand operateds, be easy to generate shake, rotating speed is inhomogeneous, when firmly rotating, drill bit also occurs crooked easily, and boring is enlarged, increase misery to patient, influence success rate of operation.Drilling speed degree into is fast though electronic drill for craniotomy has, spin stabilization, advantage that eyelet is little, time saving and energy saving, but the big deficiency of dangerous property, particularly when being about to drill through skull, because it is fast to advance the drilling speed degree, not careful slightly, then might injure the meninges under the skull, even injured brain tissue, malpracticees such as patient death, paralysis caused.Although what have has set up pick off in electronic drill for craniotomy, rotate by pick off control drill bit, after drilling through skull, drill bit in minimum distance, accurately stops to bore, but adopt pick off that weak point is also arranged: the one, break down if run into pick off, then cause immediately to bore and hinder meninges, or bore and hinder cerebral tissue; The 2nd,, even if under the control of pick off, drill bit is because of drilling through the skull stall, but the operator in time do not stop to press down, and the accident of meninges still can occur damaging; The 3rd, still there is certain error in pick off, and its sensitivity does not reach the requirement of high accuracy operation.

Summary of the invention

The purpose of this utility model is to provide a kind of and can gives full play to electronic drill for craniotomy and advance to bore the advantage fast, that eyelet is little, time saving and energy saving, and the band that can accurately control drilling depth into again and advance the drilling speed degree is limit the electronic drill for craniotomy of dark safety device.

For reaching above purpose, the technical scheme that this utility model adopted is: the electronic drill for craniotomy of the dark safety device of this band limit, by drill bit, shell, the drill bit locking nut, the flexible axle connecting bolt, flexible axle, miniature low-speed motor constitutes, the seat end of drill bit is fixed by the drill bit locking nut, the flexible axle connecting bolt is connected with flexible axle, the far-end of flexible axle is connected with the driving shaft of miniature low-speed motor, it is characterized in that establishing symmetric two horizontal support feet in the bottom of shell, barrel is established at the middle part that connects cross bar at two horizontal support feet, on the outer wall of shell, establish external screw thread, shell is rotated in the barrel, on the outer wall of the shell of barrel bottom, establish the horizontal location annulus, when the end of the drill bit tip of adjusting and two horizontal support feet is on a horizontal plane, the end opening that rotation horizontal location annulus touches barrel fastens with screw threads, the dark location annulus of on the outer wall of the shell on barrel top, limiting, the distance of limit dark location annulus and barrel upper edge is the degree of depth that drills through skull, this distance can be by means such as X-ray sheet and ultrasonic thickness measurements before operation, accurately measure punching place skull thickness, the dark location of rotation limit annulus, when itself and barrel distance suitable for reading is equated with the skull thickness of measuring, tightening corresponding screw again fixes, the scale pantograph is established on the top of a horizontal support foot therein, read into the drilling speed degree and the degree of depth from the scale pantograph, advance the drilling speed degree and rotate by hand-held housing and realize, it is excessive can not appear in the drill bit rotation process drill pressure like this.This utility model is also implemented by following measure: described scale pantograph is made of perpendicular chi, fixed axis and fork, fork is fixed by the fixed axis on the fixing perpendicular chi, the inner location deeply by limit produces swing when annulus presses down, the inner of fork to the distance of fixed axis than the outer end of fork to fixed axis distance shorter, thereby the scale on the perpendicular chi is amplified, and its scale numerical value can multiply by L1 by the dropping distance that revolves dark spacing annulus and equal the formula that the perpendicular chi scale number of degrees multiply by L2 and try to achieve; Establish rotary altitude mixture control pad in the lower end of horizontal support foot,, make the lower end of two horizontal support feet and drill bit tip on a horizontal plane, the initial calculation point when touching skin as spudding in by the adjusting of rotary altitude mixture control pad.

The beneficial effects of the utility model are: compare with the electronic drill for craniotomy of present use, because the front end at the electric drill shell has added the dark device of limit, and advance to bore by the screw thread precession, so this electronic drill for craniotomy not only has the advantage that into brill is fast, eyelet is little, time saving and energy saving, and bore and accurately to control deeply, advance the speed governing voluntarily of drilling speed degree, make into brill stable, use safer.

Description of drawings

Fig. 1 looks sketch map for this utility model structure master.

Fig. 2 is the axis cross-sectional schematic of this utility model along two feets.

The specific embodiment

Make this utility model with reference to accompanying drawing 1,2.The electronic drill for craniotomy of the dark safety device of this band limit, by drill bit 1, shell 2, drill bit locking nut 3, flexible axle connecting bolt 4, flexible axle 5, miniature low-speed motor 6 constitutes, the seat end of drill bit 1 is fixing by drill bit locking nut 3, flexible axle connecting bolt 4 is connected with flexible axle 5, the far-end of flexible axle 5 is connected with the driving shaft of miniature low-speed motor 6, it is characterized in that establishing symmetric two horizontal support feet 7 in the bottom of shell 2, establish barrel 8 at the cross bar middle part that two horizontal support feet 7 connect, on the outer wall of shell 2, establish external screw thread, shell 2 is rotated in the barrel 8, on the outer wall of the shell 2 of barrel 8 bottoms, establish horizontal location annulus 9, when the end of drill bit 1 tip of adjusting and two horizontal support feet 7 is on a horizontal plane, the end opening that rotation horizontal location annulus 9 touches barrel 8 is tightened with screw 10, the dark location annulus 11 of on the outer wall of the shell 2 on barrel 8 tops, limiting, the dark location of limit annulus 11 is the degree of depth that drills through skull with the distance of barrel 8 upper edges, this distance can be by means such as X-ray sheet and ultrasonic thickness measurements before operation, accurately measure punching place skull thickness, the dark location of rotation limit annulus 11, when itself and barrel 8 distance suitable for reading is equated with the skull thickness of measuring, tightening corresponding screw 12 again fixes, scale pantograph 13 is established on the top of a horizontal support foot 7 therein, reads into the drilling speed degree and the degree of depth from scale pantograph 13.Described scale pantograph 13 is made of perpendicular chi 13a, fixed axis 13b and fork 13c, fork 13C fixes by the fixed axis 13b on the fixing perpendicular chi 13a, the inner location deeply by limit produces swing when annulus 11 presses down, the inner of fork 13c is shorter to fixed axis 13b distance L 2 than the outer end of fork 13C to the distance L 1 of fixed axis 13b, thereby the scale on the perpendicular chi 13 is amplified; Establish rotary altitude mixture control pad 14 in the lower end of horizontal support foot 7.

Claims (2)

1. One kind with the limit dark safety device electronic drill for craniotomy, by drill bit (1), shell (2), drill bit locking nut (3), flexible axle connecting bolt (4), flexible axle (5), miniature low-speed motor (6) constitutes, the seat end of drill bit (1) is fixing by drill bit locking nut (3), flexible axle connecting bolt (4) is connected with flexible axle (5), the far-end of flexible axle (5) is connected with the driving shaft of miniature low-speed motor (6), it is characterized in that establishing symmetric two horizontal support feet (7) in the bottom of shell (2), establish barrel (8) at the cross bar middle part that two horizontal support feet (7) connect, on the outer wall of shell (2), establish external screw thread, shell (2) is rotated in the barrel (8), on the outer wall of the shell (2) of barrel (8) bottom, establish horizontal location annulus (9), the dark location annulus (11) of limiting on the outer wall of the shell (2) on barrel (8) top, scale pantograph (13) is established on the top of a horizontal support foot (7) therein.
2. 2. band according to claim 1 is limit the electronic drill for craniotomy of dark safety device, it is characterized in that described scale pantograph (13) is made of perpendicular chi (13a), fixed axis (13b) and fork (13c); Establish rotary altitude mixture control pad (14) in the lower end of horizontal support foot (7).

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