CN217859126U - Adjustable reamer - Google Patents

Abstract

The utility model discloses an adjustable reamer, which comprises a handle and an outer tube, wherein one end of the outer tube is fixedly connected with the handle, the other end of the outer tube is provided with a rectangular hole which runs through the outer tube, a push block is arranged in the rectangular hole, the head part of the outer tube outside the rectangular hole is provided with a round hole, and an end cap screw is freely inserted in the round hole; a main rod is coaxially sleeved in the outer tube, one end of the main rod, which is close to the handle, is fixedly connected with a knob, the knob is positioned outside the outer tube, and the other end of the main rod is provided with a left-handed screw rod; a left-handed screw hole is formed in one end of the pushing block, the left-handed screw hole is connected with a left-handed screw rod of the main rod in a matched mode through threads, a first screw hole is formed in the other end of the pushing block, and an end cap screw is connected with the first screw hole in a threaded matched mode; a left reamer head and a right reamer head are symmetrically arranged on the push block through pins, and the outer side surfaces of the left reamer head and the right reamer head are positioned outside the outer pipe; the left reamer head and the right reamer head are both provided with sliding grooves, and the pins penetrate through the sliding grooves. The reaming diameter of the reamer is flexible and adjustable, and the reamer is convenient to use in surgery.

Description

Adjustable reamer

Technical Field

The utility model particularly relates to an adjustable reamer belongs to medical instrument technical field.

Background

Reamers are often used during surgery to ream away specific tissue of the body. For example, for degenerative diseases of lumbar disc herniation, lumbar instability, lumbar spondylolisthesis and the like, two traditional surgical treatment schemes are generally adopted. One is that to open great wound at patient's back, end plate cartilage face about exposing the intervertebral disc under the muscle layer to clear up the cartilage face with the reamer and plant the bone bed, strike off the hyperplasia tissue, the advantage of this kind of scheme is that the clearance process is in visual state, but the defect is that the wound is great, and the self-repair cycle of patient's organism is longer. Secondly, minimally invasive treatment is carried out on the back of a patient, a reamer is inserted into a minimally invasive wound and cleans a cartilage surface and a bone grafting bed, the scheme has the advantages that the wound is small, recovery is fast, the cleaning process needs to be carried out in a non-visual state, the clinical experience of a doctor is very tested, and certain surgical risks are achieved. According to different conditions of specific patients, the two existing surgical schemes can be combined and optimized to reduce pain and risk, but most of the cutting ranges of the existing reamers are not adjustable, and reaming can be completed by matching a plurality of reamers with different specifications in the surgical process, so that the surgical time and the cost of surgical instruments are undoubtedly increased.

Disclosure of Invention

To the problem that prior art exists, the utility model provides an adjustable reamer, aim at can conveniently adjust the reaming scope of reamer, improves operation efficiency, reduces the apparatus cost.

The utility model adopts the following technical proposal:

an adjustable reamer comprises a handle and an outer tube, wherein one end of the outer tube is fixedly connected with the handle, a rectangular hole penetrating through the outer tube is formed in the other end of the outer tube, a push block is arranged in the rectangular hole, a round hole is formed in the head of the outer tube on the outer side of the rectangular hole, and a plug screw freely penetrates through the round hole;

a main rod is coaxially sleeved in the outer tube, one end of the main rod, which is close to the handle, is fixedly connected with a knob, the knob is positioned outside the outer tube, and the other end of the main rod is provided with a left-handed screw rod;

a left-handed screw hole is formed in one end of the pushing block, the left-handed screw hole is connected with a left-handed screw of the main rod in a matched mode through threads, a first screw hole is formed in the other end of the pushing block, and an end cap screw is connected with the first screw hole in a threaded matched mode; a left reamer head and a right reamer head are symmetrically arranged on the push block through pins, and the outer side surfaces of the left reamer head and the right reamer head are positioned outside the outer pipe; the left reamer head and the right reamer head are both provided with sliding grooves, and the pins penetrate through the sliding grooves.

Furthermore, a U-shaped groove is formed in the center of the top surface of the handle, a step hole penetrating through the handle is formed in the bottom of the U-shaped groove, and one end of the outer pipe is inserted into the lower portion of the step hole and welded with the handle; the knob of the main rod is positioned in the U-shaped groove, the main rod on the inner side of the knob is also provided with an annular groove, and the annular groove is positioned at the upper part of the stepped hole; the center of the side face of the handle is also provided with a second screw hole which is communicated with the upper part of the stepped hole, a limit screw is arranged in the second screw hole, and the tail end of the limit screw is positioned in the annular groove of the main rod.

Furthermore, a plurality of cleaning holes are formed in the middle of the outer pipe.

Has the advantages that: adjustable reamer through rotating the knob, can drive the mobile jib and rotate for handle and outer tube, can pull the ejector pad when the mobile jib rotates along the axial displacement of mobile jib, and when the ejector pad removed, the side of the spout of the left and right reamer head of pin oppression drive on the ejector pad to make left and right reamer head outwards extend or inwards shrink, and then realize the nimble adjustable change of the reaming diameter of reamer, make things convenient for the operation to use, improve operation efficiency.

Drawings

Fig. 1 is a schematic structural diagram of the adjustable reamer.

Fig. 2 is a front view of the handle.

Fig. 3 is a cross-sectional view of the handle of fig. 2.

Fig. 4 is a schematic view of the structure of the outer tube.

Fig. 5 is a cross-sectional view of the outer tube of fig. 4.

Fig. 6 is a schematic view of the main rod structure.

Fig. 7 is a schematic structural diagram of the push block.

Fig. 8 is a cross-sectional view of the push block of fig. 7.

Figure 9 is a schematic view of the construction of a reamer head.

Fig. 10 is an assembly view of the push block and reamer.

The labels in the figure are: the novel multifunctional wrench comprises a handle 1, an outer tube 2, a main rod 3, a push block 4, a left reamer head 5, a right reamer head 6, a 11U-shaped groove, a 12 second screw hole, a 13 step hole, a 21 cleaning hole, a 22 rectangular hole, a 23 round hole, a 31 knob, a 32 annular groove, a 33 left-handed screw, a 41 pin, a 42 left-handed screw hole, a 43 first screw hole, a 51 sliding groove and a 52 cutting edge.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the adjustable reamer comprises a handle 1, an outer tube 2, a main rod 3, a push block 4, a left reamer head 5, a right reamer head 6 and other components.

The structure of the handle 1 is shown in fig. 2-3, the handle 1 is a cuboid structure as a whole, a U-shaped groove 11 is formed in the center of the top surface of the handle 1, and a step hole 13 penetrating through the handle is formed in the bottom of the U-shaped groove 11; the structure of the outer tube 2 is shown in fig. 4-5, and the upper end of the outer tube 2 is inserted into the lower part of the stepped hole of the handle and welded with the handle. The middle part of the tube body of the outer tube is provided with a plurality of cleaning holes 21 so as to be convenient for cleaning and disinfecting the inside of the outer tube. The lower part of the outer pipe is provided with a rectangular hole 23 penetrating through the outer pipe, the head part of the lower end of the outer pipe is provided with a round hole 23 along the axial direction, and a plug screw freely penetrates through the round hole 23. The pushing block 4 is arranged in the rectangular hole, the structure of the pushing block 4 is shown in figures 7-8, a first screw hole 43 is formed in the lower end of the pushing block, and the plug screw is connected with the first screw hole in a threaded fit mode. The plug screw serves to support the push block while allowing axial movement of the push block along the outer tube.

The structure of the main rod 3 is as shown in fig. 6, the main rod 3 is coaxially sleeved in the outer tube 2 from top to bottom, a knob 31 is fixedly welded at one end, namely the upper end, of the main rod 3 close to the handle, a ring groove 32 is arranged below the knob 31, after the main rod 3 is vertically inserted into the outer tube 2, the ring groove 32 is just clamped at the upper part of the handle stepped hole 13, so that the main rod cannot continuously fall down, and meanwhile, the knob 31 is positioned in the U-shaped groove 11; in order to prevent the main rod from withdrawing from the outer tube, a second screw hole 12 is further formed in the center of the side face of the handle, the second screw hole 12 is communicated with the upper portion of the stepped hole 13, a limiting pin is installed in the second screw hole 12, the tail end of the limiting pin is located in an annular groove of the main rod, and therefore the main rod 3 can freely rotate in the outer tube 2 through the rotary knob 31 and cannot be separated from the outer tube.

The lower end of the main rod 3 is provided with a left-handed screw 33, the upper end of the push block 4 is provided with a left-handed screw hole 42, and the left-handed screw hole 42 is connected with the left-handed screw 33 of the main rod in a matching way through threads, so that the main rod is driven to rotate through a rotary knob, and the main rod can be rotationally driven to move up and down. The push block 4 is symmetrically provided with four pins 41, namely a left group and a right group, two sliding grooves 51 are formed in the reamer head, the pins 41 penetrate through the sliding grooves 51, the left reamer head 5 and the right reamer head 6 are symmetrically installed through the pins 41, and an assembly drawing of the push block and the reamer is shown in fig. 10. After the push block for mounting the reamer head is mounted in the rectangular hole of the outer tube, the outer side face cutting edges 52 of the left reamer head 5 and the right reamer head 6 penetrate through the rectangular hole of the outer tube and are located outside the outer tube, when the handle is rotated, the handle drives the outer tube to rotate, and the outer tube drives the push block and the reamer head to rotate, so that human tissues can be reamed.

When the reamer is used in an operation and the reaming diameter needs to be adjusted, the knob is rotated clockwise to drive the main rod to rotate in the outer pipe, the threads at the lower end of the main rod push the push block to move downwards, and the pin on the push block slides in the reamer chute to push the left reamer head and the right reamer head outwards; the anticlockwise rotation knob drives the mobile jib to rotate in the outer tube, and lower end screw of mobile jib promotes the ejector pad rebound, and the pin on the ejector pad slides in reamer head spout, and the reamer is inwards shrunk about to, reaches the effect of adjustment reamer size, makes things convenient for the operation to use, improves operation efficiency.

Claims (3)

1. The utility model provides an adjustable reamer, includes handle and outer tube, the one end and the handle fixed connection of outer tube, its characterized in that: a rectangular hole penetrating through the outer pipe is formed in the other end of the outer pipe, a push block is arranged in the rectangular hole, a round hole is formed in the head of the outer pipe outside the rectangular hole, and a plug screw freely penetrates through the round hole;

a main rod is coaxially sleeved in the outer tube, one end of the main rod, which is close to the handle, is fixedly connected with a knob, the knob is positioned outside the outer tube, and the other end of the main rod is provided with a left-handed screw rod;

a left-handed screw hole is formed in one end of the pushing block, the left-handed screw hole is connected with a left-handed screw rod of the main rod in a matched mode through threads, a first screw hole is formed in the other end of the pushing block, and an end cap screw is connected with the first screw hole in a threaded matched mode; a left reamer head and a right reamer head are symmetrically arranged on the push block through pins, and the outer side surfaces of the left reamer head and the right reamer head are positioned outside the outer pipe; and sliding grooves are formed in the left reamer head and the right reamer head, and the pin penetrates through the sliding grooves.

2. The adjustable reamer of claim 1 wherein: a U-shaped groove is formed in the center of the top surface of the handle, a step hole penetrating through the handle is formed in the bottom of the U-shaped groove, and one end of the outer pipe is inserted into the lower portion of the step hole and welded with the handle; the knob of the main rod is positioned in the U-shaped groove, the main rod on the inner side of the knob is also provided with an annular groove, and the annular groove is positioned at the upper part of the stepped hole; the center of the side face of the handle is also provided with a second screw hole which is communicated with the upper part of the stepped hole, a limit screw is arranged in the second screw hole, and the tail end of the limit screw is positioned in the annular groove of the main rod.

3. The adjustable reamer of claim 1 wherein: the middle part of the outer pipe is also provided with a plurality of cleaning holes.

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