Bone drill positioning and guiding device capable of improving drilling precision

Abstract

The utility model provides a bone drill positioning and guiding device capable of improving drilling accuracy, and relates to the technical field of medical instruments. The two groups of bandages are wound into a spiral shape, one end of each bandage is clamped and locked by a lock catch, the upper part of each lock catch is fixedly connected to a fixed plate, two connecting frames are fixedly connected between the fixed plates, the outer side of one connecting frame is fixedly connected with two coaxial rotary connecting blocks, the rotary connecting blocks are rotatably connected with lead screws, and one end of each lead screw is provided with a rotary handle; the threaded sleeve is driven by the lead screw to move and limited on the limiting rod through the sliding sleeve, the movable part can move along the limiting rod, and the drilling position can still be adjusted after the bandage is fixed. After external force is applied to enable the locking sliding block to slide out of the inner gear ring, the rotating shaft can rotate freely, the drilling angle can be adjusted, after the external force is removed, under the action of the spring, the locking sliding block slides into the inner gear ring and then is clamped, and the drilling angle is stabilized. The problems that an existing bone drill is unstable in holding during drilling, and the drilling angle and the drilling diameter are prone to errors are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, more specifically, it relates to a bone drill positioning and guiding device capable of improving drilling precision. BACKGROUND

[0002] If limbs are seriously injured and fractured, steel plates need to be used to help correct and recover after bone surgery, first, a hole needs to be drilled in the bone to fix the steel nail, the axis of the hole is often perpendicular to the surface of the bone, and a bone drill, a bone holding forceps and other medical instruments need to be used to drill a hole in the bone, these instruments usually do not have positioning and guiding functions, the angle of the hole drilled directly cannot be easily maintained, and the size of the hole drilled cannot be guaranteed, and clinical surgery needs to be assisted by another medical instrument for positioning, resulting in an increase in the configuration of surgical medical instruments and an increase in the number of auxiliary personnel, and the medical cost of patients is increased. UTILITY MODEL CONTENTS

[0003] In order to solve the above technical problems, the utility model provides a bone drill positioning and guiding device capable of improving drilling precision, so as to solve the problems of instability in holding the existing bone drill when drilling, and error in drilling angle and drilling diameter.

[0004] The utility model provides a bone drill positioning and guiding device capable of improving drilling precision, which is achieved by the following specific technical means:

[0005] A bone drill positioning and guiding device capable of improving drilling precision, comprising a bandage, the bandage has two groups, the bandage roll is spiral, one end of the bandage is clamped and locked by a lock, the lock is fixedly connected to a fixed plate above, the fixed plate has two groups, two connecting frames are fixedly connected between the fixed plates, a square area is formed between the connecting frames, two coaxial rotating connecting blocks are fixedly connected to the outer side of one connecting frame, a lead screw is rotatably connected to the rotating connecting block, and a handle is arranged at one end of the lead screw, two fixed connecting blocks are fixedly connected to the outer side of the other connecting frame, and a limiting rod is fixedly connected between the fixed connecting blocks, an active part is movably connected to the limiting rod and the lead screw, the active part comprises two mounting frames, an elliptical through hole is formed between the mounting frames, two side plates are fixedly connected to the upper side of the two sides of the straight side of the elliptical through hole, a rotating shaft is rotatably connected to the side plate, a tubular positioning sleeve is fixedly connected between the rotating shafts, and the axis of the rotating shaft is perpendicular to the axis of the positioning sleeve.

[0006] Further, the middle of the two connecting frames is provided with an outwardly protruding arc-shaped section.

[0007] Further, a threaded sleeve is threadedly connected to the lead screw, a sliding sleeve is slidably connected to the limiting rod, and the sliding sleeve and the threaded sleeve are respectively fixedly connected to one mounting frame.

[0008] Further, the rotating shaft one end is provided with two limit blocks, and the limit blocks are clamped on both sides of the one side support plate; the rotating shaft other end is provided with a slot, and a locking structure is arranged, the locking structure comprises an internal gear ring, and the internal gear ring is fixed on the outside of the one side support plate; the rotating shaft end portion is slidably connected with a cylindrical internal hollow locking slider, one end of the locking slider is open, and the other end is closed, the locking slider cylindrical surface is surrounded by the tooth, and is engaged with the internal gear ring, a positioning base plate is arranged in the locking slider, and the positioning base plate is slidably connected in the slot.

[0009] Further, the internal gear ring one side is fixedly connected with a U-shaped frame, a penetrating rod is arranged on the bottom of the U-shaped frame, a spring is sleeved on the penetrating rod, and one side of the spring is abutted against the closed end of the locking slider.

[0010] Further, the positioning sleeve is axially slidably connected with a sleeve, a boss is arranged on the bottom of the sleeve, a tapered centering base shaft is fixedly connected to the bottom of the boss, and a multi-petal chuck is fixedly connected to the bottom of the centering base shaft; a conical nut is threadedly connected below the boss; the center lines of the centering base shaft, the multi-petal chuck and the conical nut are provided with drill needle perforations; one end of the drill needle perforation of the conical nut is provided with a clamping inclined surface, and the clamping inclined surface is clamped on the outside of the multi-petal chuck.

[0011] Compared with the prior art, the utility model has the advantages of the following:

[0012] 1、The utility model discloses a threaded sleeve, a limiting rod and a sliding sleeve are arranged, the threaded sleeve is driven to move by the lead screw, and the sliding sleeve is limited on the limiting rod, so that the movable part can move along the limiting rod, and the drilling position can be adjusted after the bandage is fixed.

[0013] 2、The utility model discloses a locking structure, after the locking slider slides out of the internal gear ring under the action of external force, the rotating shaft can rotate freely, the drilling angle can be adjusted, after the external force is removed, under the action of the spring, the locking slider slides into the internal gear ring and is clamped, the rotating shaft cannot rotate, and the drilling angle is stable.

[0014] 3、The utility model discloses a multi-petal chuck, the bone drill bit is arranged in the centering base shaft through the sleeve end portion, the drill needle is passed through the multi-petal chuck, the conical nut is screwed below the boss, the multi-petal chuck is clamped through the clamping inclined surface, and the multi-petal chuck clamps the drill needle, and the rotation of the drill needle keeps higher roundness after the drilling machine is started, that is, the diameter of the drilling hole is guaranteed. DRAWINGS

[0015] Figure 1 It is the first visual view of the utility model.

[0016] Figure 2 It is the second visual view of the utility model.

[0017] Figure 3 It is the structural schematic view of the movable part of the utility model.

[0018] Figure 4 is the sectional view of the locking structure in free state of the utility model.

[0019] Figure 5 is the sectional view of the locking structure in locked state of the utility model.

[0020] Figure 6 is the structural schematic view of the drill needle stabilizing structure of the utility model.

[0021] Figure 7 is the sectional view of the conical nut of the utility model.

[0022] In the figure, the corresponding relationship of component name and figure number is:

[0023] 1, bandage;2, lock catch;3, fixed plate;4, connecting frame;5, arc section;6, rotating connecting block;7, screw;8, handle;9, fixed connecting block;10, limiting rod;11, threaded sleeve;12, sliding sleeve;13, mounting frame;14, side support plate;15, rotating shaft;16, limiting block;17, piece slot;18, inner tooth ring;19, locking sliding block;20, positioning base plate;21, U-shaped frame;22, through rod;23, spring;24, positioning sleeve;25, sleeve;26, boss;27, centering base shaft;28, multi-petal chuck;29, conical nut;30, clamping inclined plane. DETAILED DESCRIPTION

[0024] The embodiment of the utility model is further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0025] Example:

[0026] As shown in the accompanying Figure 1 to the accompanying Figure 7 :

[0027] This utility model provides a bone drill positioning and guiding device that can improve drilling accuracy, including a strap 1; there are two sets of straps 1, the straps 1 are rolled into a spiral shape, one end of the straps 1 is clamped and locked by a buckle 2, the buckle 2 is fixedly connected to a fixing plate 3, there are two sets of fixing plates 3, and two connecting frames 4 are fixedly connected between the fixing plates 3, forming a square area between the connecting frames 4. Two coaxial rotating connecting blocks 6 are fixedly connected to the outside of one connecting frame 4, and a lead screw 7 is rotatably connected to the rotating connecting block 6. A handle 8 is provided at one end of the lead screw 7; the other connecting frame 4 is fixedly connected to the outside of the other connecting frame 4. Two fixed connecting blocks 9 are fixedly connected to the side, and a limit rod 10 is fixedly connected between the fixed connecting blocks 9. The limit rod 10 and the lead screw 7 are movably connected to a movable part, which includes two mounting brackets 13. An elliptical through hole is opened between the mounting brackets 13. Two side support plates 14 are fixedly connected above the straight sides of the elliptical through hole on both sides of the mounting bracket 13. A rotating shaft 15 is rotatably connected to each side support plate 14. A tubular positioning sleeve 24 is fixedly connected between the rotating shafts 15, and the axis of the rotating shaft 15 is perpendicular to the axis of the positioning sleeve 24.

[0028] Among them, such as Figure 1 As shown, both connecting frames 4 are configured with outwardly protruding arc-shaped sections 5 in the middle, so that the connecting frames 4 can adapt to protruding parts such as human bones and joints, and the straps 1 on both sides can be tied to the limbs of the person.

[0029] Among them, such as Figure 1 As shown, a threaded sleeve 11 is threadedly connected to the lead screw 7; a sliding sleeve 12 is slidably connected to the limit rod 10, and the sliding sleeve 12 and the threaded sleeve 11 are each fixedly connected to a mounting bracket 13. The threaded sleeve 11 is driven to move by the lead screw 7 and is limited to the limit rod 10 by the sliding sleeve 12. The movable part can move along the limit rod 10, and the drilling position can still be adjusted after the strap 1 is fixed.

[0030] Among them, such as Figure 3 and Figure 4As shown, the rotating shaft 15 is provided with two limiting blocks 16 at one end, and the limiting blocks 16 are clamped on both sides of the one-side support plate 14; the other end of the rotating shaft 15 is provided with a sheet slot 17, and a locking structure is arranged, the locking structure comprises an inner tooth ring 18 fixed on the outside of the one-side support plate 14; the end of the rotating shaft 15 is slidingly connected with a cylindrical internally hollow locking slider 19, one end of the locking slider 19 is open and the other end is closed, the cylindrical surface of the locking slider 19 is surrounded by teeth and is engaged with the inner tooth ring 18, and a positioning base plate 20 is arranged in the locking slider 19, and the positioning base plate 20 is slidingly connected in the sheet slot 17; the one side of the inner tooth ring 18 is fixedly connected with a U-shaped frame 21, a penetrating rod 22 is arranged at the bottom of the U-shaped frame 21, a spring 23 is sleeved on the penetrating rod 22, and one side of the spring 23 abuts against the closed end of the locking slider 19; after the locking slider 19 is slid out of the inner tooth ring 18 under the action of an external force, the rotating shaft 15 can be freely rotated, the drilling angle is conveniently adjusted, and after no external force is applied, under the action of the spring 23, the locking slider 19 is slid into the inner tooth ring 18, and the rotating shaft 15 cannot be rotated, so that the drilling angle is stable.

[0031] As shown in the formula (1), the formula (2) is used as the formula (1) when the formula (1) is not applicable. Figure 3 As shown, a sleeve pipe 25 is slidingly connected in the positioning sleeve 24 in the axial direction; as shown, Figure 6 As shown, the bottom of the sleeve pipe 25 is provided with a boss 26, the bottom of the boss 26 is fixedly connected with a conical centering base shaft 27, and the bottom of the centering base shaft 27 is fixedly connected with a multi-limb chuck 28; the boss 26 is threadedly connected with a conical nut 29 below; the center lines of the centering base shaft 27, the multi-limb chuck 28 and the conical nut 29 are provided with drill needle through holes; as shown, Figure 7 As shown, one end of the drill needle through hole of the conical nut 29 is provided with a clamping inclined surface 30, and the clamping inclined surface 30 is clamped on the outside of the multi-limb chuck 28; the bone drill bit is placed in the centering base shaft 27 through the sleeve pipe 25, and the drill needle is passed through the multi-limb chuck 28 and the conical nut 29, the multi-limb chuck 28 is clamped by the clamping inclined surface 30, and the multi-limb chuck 28 clamps the drill needle, so that the rotation of the drill needle is more stable during drilling, and the drilling diameter is guaranteed.

[0032] The specific use mode and effect of the embodiment are as follows:

[0033] If the limbs of human body appear fracture, need to hit the steel plate to help postoperative recovery, first want to drill the hole fixed steel nail on the bone, and the axis of drilling hole often is perpendicular to the bone surface, in the utility model, the bandage 1 is bound on both sides of the fracture position of the limbs and is tightened, the bandage is locked through the lock catch 2, the bone drill bit is placed in the centering base shaft 27 through the sleeve 25, the drill needle is passed through the multi-petal chuck 28, the conical nut 29 is connected under the boss 26, the multi-petal chuck 28 is clamped through the clamping inclined plane 30, the multi-petal chuck 28 clamps the drill needle, the rotating handle 8 drives the threaded sleeve 11 movement and the mounting frame 13 movement through the lead screw 7, the drilling position is adjusted, the locking block 19 is slid out of the internal tooth ring 18 by applying external force, the drilling angle is adjusted, after the external force is removed, the locking block 19 slides into the internal tooth ring 18 under the action of the spring 23, the rotating shaft 15 cannot rotate, the drilling angle is stabilized, the drill is started, the drill needle drills the hole on the bone, and the sleeve 25 and the drill bit are continuously pushed down along the positioning sleeve 24 at the same time, the drilling is continuously deepened, and the drilling is stopped until the required depth is reached.

[0034] The parts not described in the utility model are the known technology of the person skilled in the art.

Claims

1. A bone drill positioning and guiding device that can improve drilling accuracy, characterized in that: The utility model provides a kind of binding belt, including binding belt (1);The binding belt (1) is two groups, and binding belt (1) is coiled spirally, and one end of binding belt (1) is clamped and locked by lock (2), and lock (2) is fixedly connected above fixed plate (3), and fixed plate (3) is two groups, and two connecting frames (4) are fixedly connected between fixed plate (3), and square area is formed between connecting frame (4), and two coaxial rotating connecting blocks (6) are fixedly connected outside one connecting frame (4), and screw (7) is rotatably connected on rotating connecting block (6), and handle (8) is arranged on one end of screw (7);The other connecting frame (4) outside fixedly connected two fixed connecting blocks (9), and limiting rod (10) is fixedly connected between fixed connecting block (9);Limiting rod (10) and screw (7) are movably connected with movable part, and movable part includes two mounting frames (13), and elliptical through-hole is arranged between mounting frame (13), and two side plates (14) are fixedly connected on the upper side of straight side of elliptical through-hole in mounting frame (13), and rotating shaft (15) is rotatably connected on side plate (14), and tubular positioning sleeve (24) is fixedly connected between rotating shaft (15), and the axis of rotating shaft (15) and the axis of positioning sleeve (24) are perpendicular to each other.

2. The drill positioning and guiding device for improving drilling accuracy according to claim 1, characterized in that: Arc-shaped section (5) is outwardly protruded in the middle of two connecting frames (4).

3. The drill positioning and guiding device of claim 1, wherein: Threaded sleeve (11) is threadedly connected on screw (7);Sliding sleeve (12) is slidably connected on limiting rod (10), and sliding sleeve (12) and threaded sleeve (11) are fixedly connected on one mounting frame (13) respectively.

4. The drill positioning and guiding device for improving drilling accuracy according to claim 1, characterized in that: Two limiting blocks (16) are arranged on one end of rotating shaft (15), and limiting block (16) is clamped on both sides of side plate (14);Slot (17) is arranged on the other end of rotating shaft (15), and locking structure is arranged, and locking structure includes internal gear ring (18), and internal gear ring (18) is fixed on the outside of side plate (14);Cylindrical locking slider (19) is slidably connected on the end of rotating shaft (15), and locking slider (19) is internally hollow, and one end of locking slider (19) is open and the other end is closed, and locking slider (19) is meshed with internal gear ring (18) by surrounding tooth on the cylindrical surface of locking slider (19), and positioning base plate (20) is arranged in locking slider (19), and positioning base plate (20) is slidably connected in slot (17).

5. The drill positioning and guiding device for improving the accuracy of drilling according to claim 4, characterized in that: U-shaped frame (21) is fixedly connected on one side of internal gear ring (18), and through rod (22) is arranged on the bottom of U-shaped frame (21), and spring (23) is sleeved on through rod (22), and one side of spring (23) is abutted on the closed end of locking slider (19).

6. The drill positioning and guiding device for improving drilling accuracy according to claim 1, wherein: The positioning sleeve (24) is axially slidably connected with a sleeve (25), the bottom of the sleeve (25) is provided with a boss (26), the bottom of the boss (26) is fixedly connected with a tapered centering base shaft (27), the bottom of the centering base shaft (27) is fixedly connected with a multi-petal chuck (28); the boss (26) is threadedly connected with a tapered nut (29) below; the center lines of the centering base shaft (27), the multi-petal chuck (28) and the tapered nut (29) are all provided with drill needle perforations; one end of the drill needle perforation of the tapered nut (29) is provided with a clamping inclined surface (30), and the clamping inclined surface (30) is clamped outside the multi-petal chuck (28).

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