CN201710409U

CN201710409U - Craniotome drill

Info

Publication number: CN201710409U
Application number: CN2010202362038U
Authority: CN
Inventors: 王兵; 王凤吉
Original assignee: Individual
Current assignee: Beijing Honghu Gaoxiang Technology Development Co Ltd
Priority date: 2010-06-24
Filing date: 2010-06-24
Publication date: 2011-01-19
Anticipated expiration: 2020-06-24

Abstract

The utility model relates to a craniotome drill, which comprises a connecting shaft connected with a driver, a sliding sleeve rotating under the drive of the connecting shaft, a driving clutch gear arranged at the top of the sliding sleeve, a main drill, a driven clutch gear arranged at the tail end of the main drill and an auxiliary drill sheathed outside the main drill. A sliding shaft is connected with the main drill from the direction of the driven clutch gear and is inserted into the sliding sleeve to guide the driven clutch gear of the main drill to engage with the driving clutch gear of the sliding sleeve, a spring is arranged inside the sliding sleeve, one end of the spring is butted against the connecting shaft and the other end thereof is butted against the sliding shaft, a link gear is inwardly arranged at the tail end of the auxiliary drill in the radial direction, the driven clutch gear of the main drill crosses with and passes through the link gear of the auxiliary drill to engage with the driving clutch gear of the sliding sleeve, and the head part of the main drill is higher than the head part of the auxiliary drill. The craniotome drill adopts the main drill and the auxiliary drill, which are sheathed with each other, so that the main drill rapidly stops rotation after drilling through the skull bone, and the auxiliary drill prevents physicians from shifting the main drill into brain accidentally due to inertial force.

Description

A kind of drill for craniotomy head

Technical field

This utility model belongs to medical apparatus and instruments, and particularly a kind of drill for craniotomy head, the major-minor drill bit that this drill for craniotomy head utilization is nested are not only realized stall rapidly behind the saturating skull of main bit drills, and secondary drill bit has prevented the doctor because the impulse force mistake is scurried into brain with main drill bit simultaneously.

Background technology

When carrying out operation of opening cranium, usually to use drilling tool on hard skull, to hole, because the skull inner close fitting is meninges, require drill bit skull but do not injure meninges thoroughly, brill cranium in the past all is feel and the experience that relies on the doctor, will cause the accident unless you give your whole attention to it, therefore, the operating difficulty height, have a big risk, developed many kinds of drill bits in order to improve this situation people, notification number is that the Chinese utility model patent of CN200991279Y discloses a kind of " anticreep; the drill for craniotomy head of anticracking ", this patent disclosure a kind of drill for craniotomy head with arrangement of clutch, well solved the problem of stall at once behind the saturating skull of bit drills, but want the doctor carefully to exert oneself, in case though firmly big some drill bit stall, can exist because the drill bit of inertia stall destroys the risk of meninges.

Summary of the invention

The purpose of this utility model is to propose a kind of drill for craniotomy head technical scheme, and the major-minor drill bit that this drill for craniotomy head utilization is nested is not only realized stall rapidly behind the saturating skull of main bit drills, and secondary drill bit has prevented the doctor because the impulse force mistake is scurried into brain with main drill bit simultaneously.

To achieve these goals, scheme of the present utility model is, a kind of drill for craniotomy, comprise a connecting axle that is connected with driver, a sliding sleeve that drives rotation by connecting axle, the top of sliding sleeve is provided with initiatively clutch tooth, a main drill bit, tail end at main drill bit is provided with passive clutch tooth, be with a secondary drill bit outside main drill bit, sliding axle is connected with main drill bit from the direction of passive clutch tooth, and sliding axle inserts that the sliding sleeve guiding is main bores described passive clutch tooth and be meshed with the described active clutch of sliding sleeve tooth, spring is installed in sliding sleeve, spring one end is close to connecting axle, and the spring other end withstands sliding axle, and described secondary drill bit tail end radially inwardly is provided with the interlock tooth, the passive clutch tooth intersection of main brill is passed the described interlock tooth of secondary drill bit and is meshed with sliding sleeve active clutch tooth, and described main drill bit head grows secondary drill bit head.

Described main drill bit head grows secondary drill bit head 1mm to 2mm.

Described connecting axle one end inwardly is provided with circular hole, and sliding sleeve screws in the circular hole by the spiral shell button and is connected as a single entity with connecting axle.

The thickness of described interlock tooth is less than 1.5mm.

This utility model to the contribution of prior art is:

1. this utility model structure has solved because the drill bit of inertia stall destroys the risk of meninges;

2. this utility model is simple in structure, easy accessibility.

Below in conjunction with embodiment and accompanying drawing this utility model is done a detailed description.

Description of drawings

Fig. 1 is this utility model STRUCTURE DECOMPOSITION sketch map;

Fig. 2 is a sliding sleeve top clutch tooth sketch map, the A-A view of Fig. 1;

Fig. 3 is main drill bit tail end clutch tooth sketch map, the C-C view of Fig. 1;

Fig. 4 is the interlock tooth sketch map that secondary drill bit tail end radially inwardly is provided with, the B-B view of Fig. 1;

Fig. 5 is for partly cuing open sketch map after this utility model assembling.

The specific embodiment

Embodiment:

A kind of drill for craniotomy embodiment, referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, described drill for craniotomy comprises a connecting axle that is connected with driver 1, a sliding sleeve 2 that drives rotation by connecting axle, the top of sliding sleeve is provided with initiatively clutch tooth 201, a main drill bit 3, tail end at main drill bit is provided with passive clutch tooth 301, outside main drill bit, be with a secondary drill bit 4, sliding axle 5 is connected with main drill bit from the direction of passive clutch tooth, sliding axle inserts the described passive clutch tooth of the main brill of sliding sleeve guiding and is meshed with the described active clutch of sliding sleeve tooth, spring 6 is installed in sliding sleeve, spring one end is close to connecting axle, and the spring other end withstands sliding axle, and described secondary drill bit tail end radially inwardly is provided with interlock tooth 401, when the passive clutch tooth of described main brill is meshed with sliding sleeve active clutch tooth, main bore passive clutch tooth and must intersect and pass the described interlock tooth of secondary drill bit, described main drill bit head 302 grows secondary drill bit head 402, promptly grows secondary drill bit head 1mm to 2mm at initial position master drill bit head.

Among the embodiment, described connecting axle one end inwardly is provided with circular hole 101, and sliding sleeve screws in the circular hole by screw socket as parts and is connected as a single entity with connecting axle; Described sliding axle one end is axially arranged with the spring positioning round orifice, and spring is put into circular hole and withstood between connecting axle and the sliding axle.

The operation principle of present embodiment is: when depressing main drill bit, because passive clutch tooth 301 intersections of the main drill bit of contraction of spring are passed the interlock tooth 401 of secondary drill bit tail end, be meshed with the described active clutch of sliding sleeve tooth 201, because sliding sleeve and connecting axle are connected as a single entity, so sliding sleeve drives main drill bit and rotates, main simultaneously drill bit drives secondary drill bit and rotates simultaneously, when the saturating skull of main bit drills, because main drill bit head has lost resistance, the passive clutch tooth 301 of main drill bit breaks away from the described active clutch of sliding sleeve tooth 201 under the active force of spring, passive clutch tooth 301 withdraws from the intersection engagement of secondary drill bit interlock tooth 401 simultaneously, and secondary drill bit had also stopped rotation when main drill bit stopped operating; Because secondary drill bit is shorter than main drill bit, therefore, the secondary drill bit of this moment does not bore skull, so though be subjected to the main bit drills of the resistance of secondary drill bit saturating skull, can not make the further test of main drill bit break cerebral tissue owing to doctor's firmly inertia yet.

The shortest in order to guarantee the passive clutch tooth 301 out-of-gear move distances of main drill bit, the thickness of described interlock tooth can not be too thick must be less than 1.5mm, the thickness of present embodiment interlock tooth is 0.8mm.

Claims

1. drill for craniotomy, it is characterized in that, described drill for craniotomy comprises a connecting axle that is connected with driver, a sliding sleeve that drives rotation by connecting axle, the top of sliding sleeve is provided with initiatively clutch tooth, a main drill bit, tail end at main drill bit is provided with passive clutch tooth, outside main drill bit, be with a secondary drill bit, sliding axle is connected with main drill bit from the direction of passive clutch tooth, sliding axle inserts the described passive clutch tooth of the main brill of sliding sleeve guiding and is meshed with the described active clutch of sliding sleeve tooth, and spring is installed in sliding sleeve, and spring one end is close to connecting axle, the spring other end withstands sliding axle, described secondary drill bit tail end radially inwardly is provided with the interlock tooth, and the passive clutch tooth intersection of main brill is passed the described interlock tooth of secondary drill bit and is meshed with sliding sleeve active clutch tooth, and described main drill bit head grows secondary drill bit head.

2. a kind of drill for craniotomy according to claim 1 is characterized in that, described main drill bit head grows secondary drill bit head 1mm to 2mm.

3. a kind of drill for craniotomy according to claim 1 is characterized in that, described connecting axle one end inwardly is provided with circular hole, and sliding sleeve screws in the circular hole by the spiral shell button and is connected as a single entity with connecting axle.

4. a kind of drill for craniotomy according to claim 1 is characterized in that the thickness of described interlock tooth is less than 1.5mm.

5. a kind of drill for craniotomy according to claim 1 is characterized in that the thickness of described interlock tooth is 0.8mm.