CN210019517U

CN210019517U - Operation trepan

Info

Publication number: CN210019517U
Application number: CN201920427256.9U
Authority: CN
Inventors: 柳长风
Original assignee: Guizhou Catalpoi Technology Co Ltd
Current assignee: Guizhou Catalpoi Technology Co Ltd
Priority date: 2019-04-01
Filing date: 2019-04-01
Publication date: 2020-02-07
Anticipated expiration: 2029-04-01

Abstract

The utility model discloses an operation trepan, which comprises a sheath body (1), wherein the sheath body (1) is provided with a through hole, the end surface of one end of the through hole is provided with a section of sawtooth-shaped groove (11), and one end of the sawtooth-shaped groove (11) of the sheath body (1) is also provided with a section of arc-shaped tongue piece (3); a saw rod (2) is further arranged in the through hole in a penetrating mode, sawteeth are annularly arranged on the end face of one end of the saw rod (2) to form a circular saw structure, a knob device is arranged at the other end of the saw rod, and an adjusting device is further movably sleeved on the saw rod (2). The utility model discloses utilize the cockscomb structure recess can stabilize the sheath body, the arc tongue piece can avoid the saw to grind and interfere, and the operation degree of depth of saw pole can be adjusted to sliding sleeve and slide, and knob handle and one-way bearing have avoided the saw pole to produce reciprocating motion's position error, have improved stability in use and security, and simple structure is practical, and the dismouting is nimble, the simple operation.

Description

Operation trepan

Technical Field

The utility model relates to the field of medical equipment manufacturing, in particular to an operation trepan.

Background

At present, the saw of trepan for the operation grinds degree of depth and adjusts, under the motionless condition in handheld position, generally be the extension length of adjusting the trepan blade, however, because the distance between handheld position and the operation position increases, handheld position is the position that does not lean on again, the hand if there is the shake, under the condition that does not have stop device, when the trepan grinds the sclerotin thoroughly, probably prick into and cause the damage, perhaps adjust stop device very inconvenient, saw to the bone like this grinds the degree of accuracy and can reduce on the contrary, can cause unnecessary damage to the operation position even, just can not guarantee the security of operation yet.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an operation trepan that can avoid the trepan to fall into the bone cavity, improves the safety in utilization.

The technical scheme of the utility model as follows:

a surgical trepan comprises a sheath body, wherein a through hole is formed in the sheath body, a section of saw-toothed groove is formed in the end face of one end of the through hole, and an arc-shaped tongue piece is further arranged at one end of the saw-toothed groove of the sheath body; a saw rod is further arranged in the through hole in a penetrating mode, sawteeth are annularly arranged on the end face of one end of the saw rod to form a circular saw structure, a knob device is arranged at the other end of the saw rod, and an adjusting device is further movably sleeved on the saw rod.

By adopting the structure, the arranged sawtooth-shaped grooves can be pressed and embedded on the surface layer of the bone under the stress condition, play a role of supporting the sheath body vertically or transversely extending into the body, and simultaneously point to the area to be operated more accurately, so that the sheath body is prevented from shifting along with the movement of the saw rod and damaging the bone in the non-operation area; the arc-shaped tongue piece can support the extending part of the extending end of the saw rod at one side of the sawtooth-shaped groove, so that saw grinding interference is avoided, and the use safety is improved; combine the bone thickness at operation position, when keeping the butt between adjusting device and the sheath body, pull out the saw rod and remove corresponding position, as operation initial position, control saw rod stretches into the degree of depth, twist reverse knob device and axial promotion, move in the sheath body with driving the saw rod, when the saw grinds to the right place, stop wrench movement knob device, because adjusting device and sheath body remain the butt state throughout, relative movement can not take place between saw rod and the adjusting device, promptly, the saw rod can not take place to remove, thus, can protect tissue and nerve outside the operation position scope, especially the intraductal nerve of vertebra, stability in use and security have been improved, simple structure is practical, and convenient for operation.

For convenience of installation, preferably, the adjusting device comprises a sliding seat, an elastic device sleeved on the outer side wall of the sliding seat and a sliding sleeve sleeved outside the elastic device, a section of annular groove is formed in the outer side wall of the saw rod, the sliding seat is sleeved on the annular groove, a first annular boss is annularly arranged on the outer side wall of the sliding seat, two through holes are symmetrically formed in the first annular boss, a steel ball is embedded in each through hole, the steel ball protrudes out of the plane where the outer side wall of the first annular boss is located, and the steel ball is clamped and positioned with the corresponding position of the annular groove; the position department that corresponds first annular boss on the inside wall of sliding sleeve is equipped with the annular boss of second, the steel ball emits the corresponding position butt of the one end of first annular boss and the annular boss lateral wall of second.

In order to simplify the structure, preferably, the elastic device comprises two limiting rings, one end of the first annular boss is connected with a first spring in an abutting mode, the other end of the first annular boss is connected with a second spring in an abutting mode, the two springs are respectively connected with one limiting ring, and the two limiting rings are respectively sleeved on the outer side wall of the corresponding end of the sliding seat; two step holes are symmetrically formed in two ends of the second annular boss, the limiting ring is embedded into the step hole of the corresponding end, and the outer side wall of the limiting ring is connected with the inner side wall of the corresponding position of the step hole in a tight fit mode.

In order to avoid the saw rod to rotate, influence the saw and grind the effect, as preferred, the knob device is established including the cover and is established the installation section of thick bamboo on the saw rod the cover is equipped with one-way bearing and rolling bearing on the installation section of thick bamboo the cover is equipped with the knob handle on one-way bearing and rolling bearing's the lateral surface.

In order to facilitate holding the sheath body, preferably, a handle is provided on the sheath body.

In order to improve the use comfort, the middle part of the outer side wall of the sliding sleeve is also provided with an annular groove, and a section of transition inclined plane is arranged between the groove bottom of the annular groove and the outer side wall of the sliding sleeve at the corresponding end, so that the sliding sleeve can be held by hands.

In order to enable the sheath body to be conveniently pressed and embedded on the bone when being stressed, the depth of the sawteeth-shaped grooves is 0.5mm, and the width of the sawteeth is 2 mm.

In order to reduce the movement error of the handle, the axial center line of the sheath body is preferably coincident with the axial center line of the saw rod, and the sheath body and the handle are arranged perpendicular to each other.

Has the advantages that: the utility model discloses utilize the cockscomb structure recess can stabilize the sheath body, the arc tongue piece can avoid the saw to grind and interfere, and the operation degree of depth of saw pole can be adjusted to sliding sleeve and slide, and knob handle and one-way bearing have avoided the saw pole to produce reciprocating motion's position error, have improved stability in use and security, and simple structure is practical, and the dismouting is nimble, the simple operation.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a structural schematic diagram of the sheath body.

Fig. 4 is a schematic view of the structure of the saw bar.

Fig. 5 is an exploded view of the installation of the sliding sleeve, the sliding seat and the stop collar.

Fig. 6 is a schematic structural view of the sliding sleeve.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Shown by figure 1, figure 2, figure 3, figure 4, figure 5 and figure 6, the utility model discloses by the sheath body 1 etc. be equipped with handle 12 on the sheath body 1, this sheath body 1 sets up with handle 12 mutually perpendicular. The sheath body 1 is provided with a through hole, the end face of one end of the through hole is provided with a section of sawtooth-shaped groove 11, the depth of sawteeth of the sawtooth-shaped groove 11 is 0.5mm, the width of the sawteeth is 2mm, and the sheath body 1 is also provided with a section of arc-shaped tongue piece 3 at one end of the sawtooth-shaped groove 11; still wear to be equipped with saw pole 2 in this through-hole, the axial direction line of sheath body 1 and the coincidence of the axial direction line of saw pole 2, the terminal surface of saw pole 2 one end is fitted with a contraceptive ring and is equipped with the sawtooth, forms the trepan structure, and the other end is equipped with the knob device, the knob device is established including the cover and is equipped with installation section of thick bamboo 8 on saw pole 2 the cover is equipped with one-way bearing 81 and rolling bearing 82 on the installation section of thick bamboo 8 the cover is equipped with knob handle 83 on one-way bearing 81 and rolling bearing 82's the lateral surface.

The saw rod 2 is also provided with an adjusting device, the adjusting device comprises a sliding sleeve 21, a sliding seat 22 and an elastic device, the outer side wall of the saw rod 2 is provided with a section of annular groove 31, the sliding seat 22 is sleeved on the annular groove 31, the outer side wall of the sliding seat 22 is annularly provided with a first annular boss 51, the first annular boss 51 is symmetrically provided with two through holes, a steel ball 52 is embedded in each through hole, the steel ball 52 protrudes out of the plane of the outer side wall of the first annular boss 51, and the steel ball 52 is clamped and positioned with the corresponding position of the annular groove 31; a second annular boss 41 is arranged on the inner side wall of the sliding sleeve 21 at a position corresponding to the first annular boss 51, and one end of the steel ball 52 protruding out of the first annular boss 51 is abutted against the corresponding position of the outer side wall of the second annular boss 41.

The elastic device comprises two limiting rings 6, one end of the first annular boss 51 is connected with a first spring 71 in an abutting mode, the other end of the first annular boss is connected with a second spring 72 in an abutting mode, the two springs are respectively connected with one limiting ring 6, and the two limiting rings 6 are respectively sleeved on the outer side wall of the corresponding end of the sliding seat 22; two stepped holes 42 are symmetrically arranged at two ends of the second annular boss 41, the limit ring 6 is embedded into the stepped hole 42 at the corresponding end, and the outer side wall of the limit ring 6 is tightly matched and connected with the inner side wall of the corresponding position of the stepped hole 42.

The middle part of the outer side wall of the sliding sleeve 21 is also provided with an annular groove, and a section of transition inclined plane is arranged between the groove bottom of the annular groove and the outer side wall of the sliding sleeve 21 at the corresponding end, so that the sliding sleeve can be held by hands.

The utility model discloses a use method as follows:

as shown in fig. 1 to 6, the sliding base 22 is sleeved on the saw bar 2, the two steel balls 52 are respectively placed in two symmetrically arranged through holes on the first annular boss 51, the two steel balls 52 protrude out of the plane where the outer side wall of the first annular boss 51 is located, the outer side surface of the second annular boss 41 is abutted to the protruding end of the steel ball 52, and meanwhile, the steel ball 52 is clamped and positioned with the corresponding position of the annular groove 31; at this time, the position of the sliding sleeve 21 corresponding to the step hole 42 is attached to the outer side wall of the stop collar 6, the inner side wall of the stop collar 6 is attached to the outer side wall of the sliding seat 22, the two ends of the first annular boss 51 are respectively provided with a first spring 71 and a second spring 72, and the two springs are both connected to the stop collar 6 corresponding to the ends.

The sliding sleeve 21 is shifted along the axial direction of the saw rod 2, when moving leftwards, the finger presses the transition inclined plane position at the left side of the outer side wall of the sliding sleeve 21, the sliding sleeve 21 moves leftwards, the left end of the second annular boss 41 extrudes the first spring 71, at this time, because the steel ball 52 does not leave the groove position of the annular groove 31, and the second annular boss 41 abuts against the steel ball 52, the sliding seat 22 does not move, along with the continuous leftward movement of the sliding sleeve 21, the outer side wall of the second annular boss 41 is separated from the steel ball 52, the elastic tension of the second spring 72 drives the limit ring 6 at the corresponding end to move, the sliding seat 22 is driven to move, the steel ball 52 can move axially on the annular groove 31, when moving to the right position, the steel ball 52 falls into the corresponding groove position of the annular groove 31, the operating sleeve 5 is released, under the elastic force of the first spring 71, the sliding sleeve 21 moves backwards, therefore, the distance of the saw rod 2 pulled out of the sliding seat 22 can be adjusted according to the distance between the annular grooves 31 and the thickness of the bone at the operation position to serve as the initial position of the operation, so that the condition that the saw is not ground in place or the saw rod extends into too much to damage tissue nerves is avoided, and the use stability and the safety are improved; by analogy with the linkage process, because the two ends of the sliding seat 22 are consistent with the connecting structure between the two limiting rings 6, when the sliding seat moves rightwards, the relevant parts can be linked adaptively, and the corresponding linkage actions should be the same, so as to achieve the purpose of relative movement between the saw bar 2 and the sliding seat 22.

During operation, the sheath body 1 extends into the body along an operation opening, after the sheath body reaches an operation target position, the sheath body 1 is knocked, one end of the serrated groove 11 is pressed and embedded on a bone at a corresponding position, so that the sheath body 1 is kept in a stable insertion state, and the arranged arc-shaped tongue piece can support the extending part of the extending end of the saw rod at one side of the serrated groove, thereby avoiding saw grinding interference and improving the use safety; then, the saw rod 2 is inserted into the through hole of the sheath body 1, the outer side wall of the limiting ring 6 connected with the first spring 71 is abutted against the end face of the corresponding end of the sheath body 1, the knob handle 83 is twisted, the rotating bearing 82 drives the one-way bearing 81 to rotate and drives the saw rod 2 to rotate, and the saw rod 2 is pushed axially to move in the through hole of the sheath body 1, in the moving process, the hand can not complete 360-degree rotation of the knob handle 83 by one action, the hand needs to move back and forth within a certain range so as to rotate the knob handle 83, namely, the knob handle 83 has a stopping gap and is not always rotating, and in the stopping period, in order to avoid the saw rod 2 from generating reciprocating movement and influencing the sawing position and the sawing effect, the one-way bearing 81 is arranged to prevent the saw rod 2 from rotating.

When the saw is ground to the position, when the bone of operation position is worn to the saw promptly, knob handle 83 can feel saw pole 2 resistance diminishes, or does not feel the foreign matter and block to be, stop wrench movement knob handle 83 immediately, because the spacing ring 6 and the sheath body 1 that correspond the end remain the butt state throughout, relative movement can not take place between saw pole 2 and the slide 22, promptly, the saw pole can not take place to remove, like this, can protect tissue and nerve outside the operation position scope, especially the intraductal nerve of vertebra, improved stability in use and security, simple structure is practical, and the simple operation.

The utility model discloses do not describe the part unanimously with prior art, do not describe herein any more.

The above is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent structures made by the contents of the specification and the drawings are directly or indirectly applied to other related technical fields, all the same principle is within the patent protection scope of the present invention.

Claims

1. A surgical trepan, comprising: the protective sleeve comprises a protective sleeve body (1), wherein a through hole is formed in the protective sleeve body (1), a section of sawtooth-shaped groove (11) is formed in the end face of one end of the through hole, and an arc-shaped tongue piece (3) is further arranged at one end of the sawtooth-shaped groove (11) of the protective sleeve body (1); a saw rod (2) is further arranged in the through hole in a penetrating mode, sawteeth are annularly arranged on the end face of one end of the saw rod (2) to form a circular saw structure, a knob device is arranged at the other end of the saw rod, and an adjusting device is further movably sleeved on the saw rod (2).

2. The surgical trepan of claim 1, wherein: the adjusting device comprises a sliding seat (22), an elastic device sleeved on the outer side wall of the sliding seat (22) and a sliding sleeve (21) sleeved outside the elastic device, wherein a section of annular groove (31) is formed in the outer side wall of the saw rod (2), the sliding seat (22) is sleeved on the annular groove (31), a first annular boss (51) is annularly arranged on the outer side wall of the sliding seat (22), two through holes are symmetrically formed in the first annular boss (51), a steel ball (52) is embedded in each through hole, the steel ball (52) protrudes out of the plane where the outer side wall of the first annular boss (51) is located, and the steel ball (52) is clamped and positioned with the corresponding position of the annular groove (31); the position department that corresponds first annular boss (51) on the inside wall of sliding sleeve (21) is equipped with second annular boss (41), steel ball (52) emerge the corresponding position butt of one end and second annular boss (41) lateral wall of first annular boss (51).

3. The surgical trepan of claim 2, wherein: the elastic device comprises two limiting rings (6), one end of the first annular boss (51) is connected with a first spring (71) in an abutting mode, the other end of the first annular boss is connected with a second spring (72) in an abutting mode, the two springs are respectively connected with one limiting ring (6), and the two limiting rings (6) are respectively sleeved on the outer side wall of the corresponding end of the sliding seat (22); two step holes (42) are symmetrically arranged at two ends of the second annular boss (41), the limiting ring (6) is embedded into the step holes (42) at the corresponding ends, and the outer side wall of the limiting ring (6) is in close fit connection with the inner side wall of the corresponding position of the step holes (42).

4. The surgical trepan of claim 1, wherein: the knob device comprises an installation cylinder (8) sleeved on the saw rod (2), wherein a one-way bearing (81) and a rotating bearing (82) are sleeved on the installation cylinder (8), and a knob handle (83) is sleeved on the outer side surfaces of the one-way bearing (81) and the rotating bearing (82).

5. The surgical trepan of claim 1, wherein: the sheath body (1) is provided with a handle (12).

6. The surgical trepan of claim 2, wherein: the middle part of the outer side wall of the sliding sleeve (21) is also provided with an annular groove, and a section of transition inclined plane is arranged between the bottom of the annular groove and the outer side wall of the sliding sleeve (21) at the corresponding end, so that the sliding sleeve can be held by hands conveniently.

7. The surgical trepan of claim 1, wherein: the depth of the saw teeth of the saw-tooth-shaped groove (11) is 0.5mm, and the width of the saw teeth is 2 mm.

8. The surgical trepan of claim 5, wherein: the axial center line of the sheath body (1) is superposed with the axial center line of the saw rod (2), and the sheath body (1) and the handle (12) are arranged perpendicular to each other.