CN210044081U - Medical reamer capable of being opened - Google Patents

Abstract

The utility model discloses a medical reamer capable of being unfolded, which comprises a rod body, an end head and a handle, wherein the end head and the handle are respectively and fixedly arranged at two ends of the rod body, a telescopic lead screw mechanism is arranged in the rod body, two sliders which can stretch in the lateral direction are arranged on the end head, the two sliders are oppositely arranged, the outer wall surfaces of the two sliders are respectively provided with a cutting edge, a driving assembly is arranged in the end head, the driving assembly is fixedly connected with one end of the telescopic lead screw mechanism, one end of the handle arranged on the rod body is provided with an adjusting knob, and the adjusting knob is fixedly connected with the other end of the telescopic lead screw mechanism; the utility model discloses can strut to adjust its external dimension, use a reamer just can replace the reamer of multiple different specifications, help shortening the operation time, improve the operation success rate.

Description

Medical reamer capable of being opened

Technical Field

The utility model relates to a reamer, concretely relates to medical reamer of formula of can strutting belongs to the medical instrument field.

Background

With the progress of medical technology in China, more and more diseases can be treated by minimally invasive surgery, the minimally invasive surgery is a minimally invasive surgery as the name implies, and the harm of the minimally invasive surgery to human bodies is much lower than that of the traditional surgery. Minimally invasive surgery has the advantages of small wound, light pain, quick recovery and the like, so more and more people choose to treat diseases by adopting the minimally invasive surgery. In the field of minimally invasive spinal surgery, spinal endoscopic minimally invasive surgery is a core technology in the field.

At present, a reamer is required to be used in a plurality of minimally invasive spinal surgeries, is used in a minimally invasive channel and is required to be used under X-ray monitoring. The existing reamer specifications are all fixed sizes, and reamers with different sizes are required to be used in one operation, so that the operation time is prolonged, and the radiation risk of X-rays on doctors and patients is increased. The existing reamer is fixed in specification, and the external size of the reamer of one specification is fixed and unchangeable, so that in some operations, such as lumbar fusion operation, the cartilage end plate of the vertebral plate is required to be effectively treated, and the final purpose can be achieved only by replacing reamers of various models when the cartilage end plate is reamed. On one hand, a large amount of capital is required for purchasing reamers of different models in a hospital, on the other hand, the difficulty of the operation is increased, and the physical strength of a doctor is consumed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a medical reamer of formula of can strutting to solve the technical problem among the prior art, it can strut, thereby adjusts its external dimension, uses the reamer just can replace the reamer of multiple different specifications, can carry out work under the backbone scope is visual moreover, and is safe, effective, accurate, helps shortening the operation time, improves the success rate of performing the operation.

The utility model provides a medical reamer capable of being unfolded, which comprises a rod body, an end head and a handle, wherein the end head and the handle are respectively and fixedly arranged at two ends of the rod body, a telescopic lead screw mechanism is arranged in the rod body, two sliders which can stretch in the lateral direction are arranged on the end head, the two sliders are oppositely arranged, cutting edges are arranged on the outer wall surfaces of the two sliders, a driving assembly is arranged in the end head, the driving assembly is fixedly connected with one end of the telescopic lead screw mechanism, an adjusting knob is arranged at one end of the rod body, and the adjusting knob is fixedly connected with the other end of the telescopic lead screw mechanism;

the driving assembly drives the two sliding blocks to mutually approach or mutually separate under the driving of the telescopic screw rod mechanism.

In the aforementioned medical reamer of can strutting, preferably, the casing of end is hollow structure, the casing has first curb plate, second curb plate, first end plate, second end plate, roof and bottom plate, first curb plate with second curb plate parallel arrangement all is equipped with a mounting hole on the two, two the slider is installed respectively in two the mounting hole, first end plate with second end plate mutual disposition, the through-hole has been seted up on the second end plate, the outer wall of second end plate with body of rod fixed connection, retractable lead screw mechanism's one end is passed through the through-hole stretches into in the casing.

Among the aforementioned medical reamer of formula of can strutting, preferably, retractable screw mechanism includes drive lead screw, drive sleeve pipe and spacing snap ring, the one end of drive lead screw with drive assembly fixed connection, the other end with the drive sleeve pipe spiro union, the other end of drive sleeve pipe stretches out the body of rod and with adjust knob fixed connection, spacing snap ring is two, and fixed the setting is in the body of rod, be formed with the spacing boss of an annular on the drive sleeve pipe, the spacing boss of annular is located two between the spacing snap ring, two interval between the spacing snap ring equals the thickness of spacing boss.

In the expandable medical reamer, preferably, the driving assembly includes at least two driving units, two of the driving units are symmetrically arranged relative to the driving screw rod, each driving unit includes a connecting rod, a sliding sleeve and a driving rod, the connecting rod is arranged parallel to the top plate and the bottom plate, one end of the connecting rod is fixedly connected with the driving screw rod, the other end of the connecting rod is fixedly connected with the sliding sleeve, the axis of the sliding sleeve is perpendicular to the top plate and the bottom plate, and the driving rod is slidably mounted on the sliding sleeve; the slider is provided with a group of oppositely arranged guide sliding chutes, and two ends of the driving rod are respectively positioned in the two guide sliding chutes.

In the expandable medical reamer, preferably, the sliding block is composed of a first plate body, a second plate body and a third plate body, which are sequentially connected to form a U-shaped structure, wherein the first plate body and the third plate body are parallel to each other, and the first plate body and the third plate body are both provided with the guide sliding grooves.

In the aforementioned expandable medical reamer, preferably, the blades have a strip-shaped structure and are arranged on the outer wall surface of the second plate in parallel at equal intervals.

In the expandable medical reamer, preferably, guide grooves are formed on inner wall surfaces of the top plate and the bottom plate, the guide grooves are parallel to the driving screw rod, and two ends of the driving rod are respectively located in the guide grooves on the top plate and the bottom plate.

In the above expandable medical reamer, preferably, a guide sleeve is provided on an inner wall surface of the first end plate, and an end of the driving screw rod is inserted into the guide sleeve.

In the aforementioned expandable medical reamer, preferably, a groove is formed in a middle position of the handle, and the adjusting knob is located in the groove.

In the aforementioned expandable medical reamer, preferably, the shaft body of the handle is formed with two annular grooves.

Compared with the prior art, the utility model discloses a body of rod, end and handle are equipped with retractable lead screw mechanism in the body of rod, are equipped with two sliders along the side direction is flexible on the end, and two slider mutual dispositions all are equipped with the cutting edge on the outer wall of two sliders, are equipped with drive assembly in the end, and drive assembly drives two sliders and is close to each other or keep away from each other under retractable lead screw mechanism's drive. Thereby the realization is right the utility model discloses whole size's regulation, like this alright satisfy the demand of operation under the condition of not changing the reamer. Effectively improves the operation efficiency and the operation success rate, and also reduces the purchase cost of the surgical instruments for hospitals.

Drawings

Fig. 1 is an isometric view of the present invention;

FIG. 2 is an isometric view of the slider in the extended tip condition;

FIG. 3 is a schematic view of the internal structure of the half-section of the tip;

FIG. 4 is a cross-sectional view of a cylindrical visualization tip;

FIG. 5 is an isometric view of a removable rod and retractable lead screw mechanism;

FIG. 6 is an isometric view of the drive assembly and slide;

fig. 7 is a schematic view of the structure of the handle and the adjusting knob.

Description of reference numerals: 1-rod body, 2-end, 3-handle, 4-slide block, 5-drive component, 6-adjusting knob, 7-first side plate, 8-second side plate, 9-first end plate, 10-second end plate, 11-top plate, 12-bottom plate, 13-mounting hole, 14-through hole, 15-drive screw rod, 16-drive sleeve, 17-limit snap ring, 18-annular limit boss, 19-connecting rod, 20-sliding sleeve, 21-drive rod, 22-guide chute, 23-blade, 24-first plate body, 25-second plate body, 26-third plate body, 27-guide chute, 28-guide sleeve, 29-groove, 30-annular groove, 31-first rod body, 32-second rod body, 33-lightening holes, 34-graduation, 35-marked arrows.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

The embodiment of the utility model provides a: as shown in fig. 1 and 2, a medical reamer capable of being unfolded comprises a rod body 1, an end head 2 and a handle 3, wherein the end head 2 and the handle 3 are respectively and fixedly arranged at two ends of the rod body 1, a telescopic lead screw mechanism is arranged in the rod body 1, two sliders 4 which stretch in the lateral direction are arranged on the end head 2, the two sliders 4 are arranged oppositely, cutting edges 23 are respectively arranged on the outer wall surfaces of the two sliders 4, as shown in fig. 3, a driving component 5 is arranged in the end head 2, the driving component 5 is fixedly connected with one end of the telescopic lead screw mechanism, an adjusting knob 6 is arranged at one end of the rod body 1, which is provided with the handle 3, and the adjusting knob 6 is fixedly connected with; the driving component 5 drives the two sliding blocks 4 to approach or depart from each other under the driving of the telescopic screw rod mechanism.

During the use, as shown in fig. 1 under the initial state, two sliders 4 all contract in end 2, cutting edge 23 on its outer wall surface stretches out for a short time, make when unsatisfied user demand, when the distance between two sliders 4 needs to be increased, only need to rotate adjusting knob 6, adjusting knob 6 drives the extension of adjusting screw, promote drive assembly 5, two sliders 4 of drive assembly 5 drive are kept away from each other, stretch out end 2 promptly, can refer to fig. 2, fig. 2 is the state when slider 4 stretches out end 2, can adjust the amount of stretching out of slider 4 according to user demand. It should be noted that, the other two sliding blocks 4 may also be designed to extend when the retractable lead screw mechanism is retracted according to the requirement. Can be set according to the use requirement. Through the utility model discloses can realize the change of distance between two sliders 4 to replace the reamer of different diameters, realize the multi-purpose of a sword, help improving operation efficiency and success rate, reduce apparatus purchasing cost.

It should be noted that the present invention can be applied to the driving assembly 5 of the present embodiment, which is sufficient to drive the two sliding blocks 4 to approach each other or move away from each other, and a preferred structure is provided below.

In a specific embodiment, please refer to fig. 3 and 4, the housing of the tip 2 is a hollow structure, the housing has a first side plate 7, a second side plate 8, a first end plate 9, a second end plate 10, a top plate 11 and a bottom plate 12, the first side plate 7 and the second side plate 8 are arranged in parallel, both of them are provided with a mounting hole 13, the mounting hole 13 is communicated with the hollow portion of the housing, two sliders 4 are respectively installed in the two mounting holes 13 and can slide in the mounting holes 13 to extend out of or into the housing, the first end plate 9 and the second end plate 10 are arranged oppositely, the second end plate 10 is provided with a through hole 14, the outer wall surface of the second end plate 10 is fixedly connected with the rod body 1, and one end of the retractable lead screw mechanism extends into the housing through the through hole 14. Since the first end plate 9 is located at the most distal end, in order to prevent the end portion from accidentally damaging organs or tissues in the human body, it is preferable that the outer end surface of the first end plate 9 is designed to have a spherical structure or a non-angular convex structure.

Further, as shown in fig. 5, the retractable lead screw mechanism includes a driving lead screw 15, a driving sleeve 16 and two limiting snap rings 17, one end of the driving lead screw 15 is fixedly connected with the driving assembly 5, the other end of the driving lead screw is connected with the driving sleeve 16 in a threaded manner, the other end of the driving sleeve 16 extends out of the rod body 1 and is fixedly connected with the adjusting knob 6, the two limiting snap rings 17 are fixedly arranged in the rod body 1, an annular limiting boss 18 is formed on the driving sleeve 16, the annular limiting boss 18 is located between the two limiting snap rings 17, and the distance between the two limiting snap rings 17 is equal to the thickness of the limiting boss 18.

When the driving sleeve 16 is rotated by the adjusting knob 6, the driving screw rod 15 and the driving sleeve 1 are in a threaded connection mode, so that the driving screw rod 15 can move along the axial direction, and the purpose of pushing or pulling the driving component 5 is achieved. For the convenience of production and assembly, the rod body 1 may be designed to be a split structure, that is, the rod body may be designed to be composed of a first rod body 31 and a second rod body 32, which are connected or clamped by a screw thread, so that the rod body is convenient to process and carry, and a lightening hole 33 may be formed on the rod bodies of the first rod body and the second rod body to reduce the manufacturing cost. The design of the rod body 1 as a split structure also has an important advantage that in some operations, a reamer with a larger diameter is used, that is, when the end of the reamer is not spread, the minimum diameter of the reamer is larger than the working channel of the working cannula or the endoscope, and if the working cannula or the endoscope is inserted into the body of a patient first, the reamer cannot be inserted into the working cannula or the endoscope. The reamer is required to be installed on a working sleeve or an endoscope firstly under the condition, and the problem that the large-diameter reamer cannot be matched with the working sleeve or the endoscope can be solved by designing the rod body 1 into a split structure.

As shown in fig. 6, the driving assembly 5 includes at least two driving units, two driving units are symmetrically disposed relative to the driving screw 15, and in order to ensure the smooth movement of the slider 4, four driving units are preferably disposed in the present embodiment, that is, two driving units are disposed on each side of the driving screw 15. As shown in fig. 6, each driving unit comprises a connecting rod 19, a sliding sleeve 20 and a driving rod 21, the connecting rod 19 is arranged parallel to the top plate 11 and the bottom plate 12, one end of the connecting rod 19 is fixedly connected with the driving screw 15, the other end of the connecting rod is fixedly connected with the sliding sleeve 20, the axis of the sliding sleeve 20 is perpendicular to the top plate 11 and the bottom plate 12, and the driving rod 21 is slidably mounted on the sliding sleeve 20; each slide block 4 is provided with two groups of oppositely arranged guide sliding chutes 22, and two ends of the driving rod 21 are respectively positioned in the guide sliding chutes 22. It should be noted here that the number of the guide chutes 22 is determined by the number of the driving units, and each driving unit needs to be provided with one set of the guide chutes 22.

Specifically, the slider 4 is composed of a first plate 24, a second plate 25 and a third plate 26, which are sequentially connected to form a "U" shaped structure, wherein the first plate 24 and the third plate 26 are parallel to each other, and the first plate 24 and the third plate 26 are both provided with guide chutes 22.

In the present embodiment, since four driving units are provided, that is, two driving units are provided on each slide 4 to cooperate with the driving units, two guiding sliding grooves 22 are provided on each slide 4. It should be noted that, because the driving rod 21 can only do linear motion, when it is desired to realize that the driving rod 21 drives the sliding block 4 to move, the guiding sliding grooves 22 are necessarily arranged obliquely, the guiding sliding grooves 22 on the single sliding block 4 are inclined in the same direction, and the guiding sliding grooves 22 on the left sliding block 4 and the right sliding block 4 are in a symmetrical relationship, please refer to fig. 6 specifically. The amount of extension of the slider 4 is related to the inclination angle and the length of the guide runner 22, and the greater the inclination angle, the greater the length, the greater the amount of extension.

In order to ensure the service life of the present invention, preferably, guide grooves 27 are formed on the inner wall surfaces of the top plate 11 and the bottom plate 12, the guide grooves 27 are arranged in parallel to the driving screw rod 15, and the two ends of the driving rod 21 are respectively located in the guide grooves 27 on the top plate 11 and the bottom plate 12. Through the arrangement of the guide groove 27, the motion track of the driving rod 21 can be effectively limited, and the driving rod is prevented from being distorted and deformed due to external force.

Further, a guide bush 28 is provided on an inner wall surface of the first end plate 9, and an end portion of the drive screw 15 is inserted into the guide bush 28. The guide sleeve 28 can play a role in supporting the driving screw rod 15, so that the stress of the driving screw rod 15 is more uniform, and the operation of the utility model is smoother.

In a preferred embodiment, the blades 23 are in a strip-shaped structure, the middle of the blades is higher than the two sides of the blades, and the blades 23 are in a convex structure, and are arranged on the outer wall surface of the second plate 25 in parallel at equal intervals.

The middle position of the handle 3 is provided with a groove 29, and the adjusting knob 6 is positioned in the groove 29. As shown in fig. 7, the adjusting knob 6 is provided with a scale 34 on the outer peripheral wall thereof, and the handle 3 is provided with a mark arrow 35. Because the displacement of the adjusting knob 6 driving the screw rod 15 to move every turn is fixed, the moving distance of the two sliding blocks 4 can be calculated according to the scales 34 on the adjusting knob 6, and the accuracy of the operation is improved conveniently. In order to facilitate the operation, two ring grooves 30 are formed on the rod body of the handle 3, so that the force can be conveniently applied by hands.

The structure, features and effects of the present invention have been described in detail above according to the embodiment shown in the drawings, and the above description is only the preferred embodiment of the present invention, but the present invention is not limited to the implementation scope shown in the drawings, and all changes made according to the idea of the present invention or equivalent embodiments modified to the same changes should be considered within the protection scope of the present invention when not exceeding the spirit covered by the description and drawings.

Claims (10)

1. The utility model provides a medical reamer of formula of can strutting which characterized in that: the telescopic screw rod mechanism comprises a rod body (1), an end head (2) and a handle (3), wherein the end head (2) and the handle (3) are fixedly arranged at two ends of the rod body (1) respectively, a telescopic screw rod mechanism is arranged in the rod body (1), two sliders (4) which stretch in the lateral direction are arranged on the end head (2), the two sliders (4) are arranged oppositely, cutting edges (23) are arranged on outer wall surfaces of the two sliders (4), a driving assembly (5) is arranged in the end head (2), the driving assembly (5) is fixedly connected with one end of the telescopic screw rod mechanism, an adjusting knob (6) is arranged at one end of the rod body (1) provided with the handle (3), and the adjusting knob (6) is fixedly connected with the other end of the telescopic screw rod mechanism;

the driving component (5) drives the two sliding blocks (4) to approach or separate from each other under the driving of the telescopic screw rod mechanism.

2. The expandable medical reamer of claim 1 wherein: the casing of end (2) is hollow structure, the casing has first curb plate (7), second curb plate (8), first end plate (9), second end plate (10), roof (11) and bottom plate (12), first curb plate (7) with second curb plate (8) parallel arrangement all is equipped with a mounting hole (13) on the two, two slider (4) are installed two respectively in mounting hole (13), first end plate (9) with second end plate (10) mutual disposition, through-hole (14) have been seted up on second end plate (10), the outer wall of second end plate (10) with body of rod (1) fixed connection, retractable lead screw mechanism's one end is passed through-hole (14) stretch into in the casing.

3. The expandable medical reamer of claim 2 wherein: retractable screw rod mechanism includes drive lead screw (15), driving sleeve (16) and spacing snap ring (17), the one end of drive lead screw (15) with drive assembly (5) fixed connection, the other end with driving sleeve (16) spiro union, the other end of driving sleeve (16) stretches out the body of rod (1) and with adjust knob (6) fixed connection, spacing snap ring (17) are two, and fixed the setting is in the body of rod (1), be formed with an annular spacing boss (18) on driving sleeve (16), annular spacing boss (18) are located two between spacing snap ring (17), two interval between spacing snap ring (17) equals the thickness of spacing boss (18).

4. The expandable medical reamer of claim 3 wherein: the driving assembly (5) comprises at least two driving units, the driving units are symmetrically arranged relative to the driving screw rod (15) in pairs, each driving unit comprises a connecting rod (19), a sliding sleeve (20) and a driving rod (21), the connecting rods (19) are arranged in parallel to the top plate (11) and the bottom plate (12), one end of each connecting rod (19) is fixedly connected with the driving screw rod (15), the other end of each connecting rod is fixedly connected with the sliding sleeve (20), the axis of each sliding sleeve (20) is perpendicular to the top plate (11) and the bottom plate (12), and the driving rods (21) are slidably mounted on the sliding sleeves (20); the sliding block (4) is provided with a group of oppositely arranged guide sliding chutes (22), and two ends of the driving rod (21) are respectively positioned in the two guide sliding chutes (22).

5. The expandable medical reamer of claim 4 wherein: the slider (4) comprises a first plate body (24), a second plate body (25) and a third plate body (26), the first plate body (24), the second plate body and the third plate body are sequentially connected to form a U-shaped structure, the first plate body (24) and the third plate body (26) are parallel to each other, and the guide sliding groove (22) is formed in each of the first plate body (24) and the third plate body (26).

6. The expandable medical reamer of claim 5 wherein: the blades (23) are of long strip-shaped structures and are arranged on the outer wall surface of the second plate body (25) in parallel at equal intervals.

7. The expandable medical reamer of claim 4 wherein: guide grooves (27) are formed in the inner wall surfaces of the top plate (11) and the bottom plate (12), the guide grooves (27) are arranged in parallel to the driving screw rod (15), and two ends of the driving rod (21) are located in the guide grooves (27) in the top plate (11) and the bottom plate (12) respectively.

8. The expandable medical reamer of claim 3 wherein: the inner wall surface of the first end plate (9) is provided with a guide sleeve (28), and the end part of the driving screw rod (15) is inserted into the guide sleeve (28).

9. The expandable medical reamer of claim 1 wherein: a groove (29) is formed in the middle of the handle (3), and the adjusting knob (6) is located in the groove (29).

10. The expandable medical reamer of claim 1 or 9 wherein: two ring grooves (30) are formed on the rod body of the handle (3).

Images