A reciprocating osteotomy device

Abstract

The application relates to the technical field of medical devices, improves the problem of unstable sawing of a wire saw for cutting a bone, discloses a reciprocating bone cutting device which comprises a fixing sleeve, a rotating shaft, a traction mechanism and a cutting wire; two axial pull wire grooves are symmetrically arranged on the central surface of the fixing sleeve along the axial direction; the rotating shaft is rotationally connected in the fixing sleeve, the surface of the rotating shaft is provided with a guide groove, the guide groove comprises a forward section and a return section which are connected in a head-tail mode; the traction mechanism is arranged through the pull wire groove and is slidingly connected on the guide groove, the traction mechanism is two, and when one traction mechanism slides from the forward section to the return section, the other traction mechanism slides from the return section to the forward section; the two ends of the cutting wire are respectively fixed on the two traction mechanisms and pass through the part of the human bone which needs to be cut. The two traction mechanisms are simultaneously limited by the guide groove and the pull wire groove, and the movement directions are opposite, so that the cutting wire reciprocally saws along a straight line in a plane to cut the human bone, and the cutting precision and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a reciprocating osteotomy device. BACKGROUND

[0002] Osteotomy is a common surgical operation in orthopedic surgery, which cuts human bones by medical wire saws. The traditional method is to use manual sawing operation, which not only consumes a lot of labor, but also causes inaccurate sawing and affects the surgical effect. Therefore, a medical power wire saw is used to pull the medical wire back and forth by an oscillating device driven by electricity to save time and labor. However, the oscillation range of the oscillating device is large and unstable, and it is easy to be disturbed by soft tissues around the bone without space, and it is easy to cut a large range of soft tissues.

[0003] In order to solve the above problems, the reciprocating wire saw is further improved, mainly including a transmission mechanism, a cutting wire and a power device. The power device is connected to the cutting wire through the transmission mechanism and drives the cutting wire to reciprocate through the transmission mechanism to achieve the cutting effect. The transmission mechanism includes a wheel disc, a worm and a turbine. The wheel disc is provided with two and is installed on both sides of the worm. The wheel disc is provided with a rotating pin on the side away from the worm. The two rotating pins and the wheel disc are eccentrically arranged, and the two rotating pins are not on the same straight line. During cutting, the two ends of the cutting wire are fixed on the two rotating pins, and the cutting wire is sleeved on the ligament and other bone parts that need to be cut. When the turbine worm drives the wheel disc to rotate, the rotating pin drives the cutting wire to reciprocate, thereby cutting the cutting part.

[0004] Compared with the oscillating sawing type cutting method, the above-mentioned reciprocating wire saw is easier to operate and causes less damage to human bones. However, when the wheel disc rotates, the cam mechanism will cause the cutting wire to oscillate up and down, and the cutting wire does not move in one plane during cutting, which still causes insufficient cutting precision. Moreover, the cutting wire is in a free state and needs to be continuously pulled by manpower during cutting, which is not convenient to operate. SUMMARY

[0005] In order to improve the defect that the wire saw cutting for osteotomy is unstable, the present application provides a reciprocating osteotomy device.

[0006] The present application provides a reciprocating osteotomy device, which adopts the following technical scheme:

[0007] A reciprocating osteotomy device, comprising:

[0008] A fixed sleeve is symmetrically provided with two axial pull wire grooves on the central surface in the axial direction;

[0009] A rotating shaft is rotatably connected in the fixed sleeve. The surface of the rotating shaft is provided with a guide groove, and the guide groove includes a forward segment and a return segment connected in sequence.

[0010] traction mechanisms, which are two in number, pass through the pull-wire groove in the direction of the fixed sleeve shaft center and are slidingly connected to the guide groove, when one of the traction mechanisms slides from the advancing section to the recovery section, the other traction mechanism slides from the recovery section to the advancing section; and

[0011] a cutting wire, two ends of which are fixed to the two traction mechanisms respectively.

[0012] By adopting the above technical scheme, before the osteotomy operation, the cutting wire is wound around the part of the human bone to be cut, so that the whole cutting wire is kept in a plane; the driving shaft is driven to rotate, the traction mechanisms are simultaneously limited by the guide groove and the pull-wire groove, and when one traction mechanism moves on the advancing section to the recovery section, the other traction mechanism moves on the recovery section to the advancing section, so as to realize the reciprocating sawing of the cutting wire in a straight line in a plane to cut the object, which reduces the possibility of deviation of the cutting wire, improves the cutting precision and efficiency, and avoids the defect of space limitation since the reciprocating osteotomy device body does not need to swing; in addition, the end of the fixed sleeve can be abutted on the human bone, and the cutting wire connected to the traction mechanism can be correspondingly adjusted to be straight, so that the cutting wire does not need to be additionally tightened by manpower, which is more labor-saving.

[0013] Optionally, the traction mechanism comprises a sliding shaft and a ball which are movably connected, the ball rolls in the guide groove, and the sliding shaft slides in the sliding groove.

[0014] By adopting the above technical scheme, the rolling ball is arranged on the traction mechanism to roll in the guide groove, so that the sliding is changed to rolling, the frictional resistance and the wear of the traction mechanism and the driving shaft are reduced, the reciprocating motion is smoother, and the stability of the cutting process is improved, and the situation that the cutting wire jumps due to the jamming of the traction mechanism is also reduced.

[0015] Optionally, the traction mechanism further comprises a sliding sleeve, the ball is rollingly connected in the sliding sleeve, the sliding shaft is connected to one end of the sliding sleeve away from the ball, and an end face of the sliding sleeve towards the sliding shaft is abutted against the inner wall of the fixed sleeve.

[0016] By adopting the above technical scheme, the ball and the sliding shaft are connected through a sliding sleeve, the sliding sleeve is made of a material with small damping, the frictional force borne by the ball can be further reduced, and the sliding sleeve is abutted against the fixed sleeve, so that the possibility of swinging of the sliding shaft is reduced, and the stability and accuracy of the cutting are further improved.

[0017] Optionally, the fixing sleeve is further connected with a tensioning mechanism, the tensioning mechanism comprises a connecting piece connected with the fixing sleeve, the connecting piece comprises two connecting arms symmetrically arranged along the central plane of the fixing sleeve, and an end of each connecting arm away from the fixing sleeve is connected with a supporting wheel.

[0018] By adopting the above technical scheme, when cutting the cut object, the cutting wire is abutted against the supporting wheel and is thus expanded, which not only has a tensioning effect, but also avoids too small cutting angle of the cutting wire, and the supporting wheel and the connecting arm can be rotationally connected, thereby reducing the frictional resistance of the cutting wire and further ensuring the stability of the sawing process.

[0019] Optionally, the tensioning mechanism further comprises an adjusting rod coaxially connected with the fixing sleeve, an end surface of the adjusting rod away from the fixing sleeve is provided as an arc-shaped supporting surface, and the supporting surface is abutted against the cut object.

[0020] By adopting the above technical scheme, the end of the adjusting rod is abutted against the cut object such as human bone, the surface of the human bone is generally arc-shaped, the end surface is provided as an arc shape matched with the human bone, point contact is converted into surface contact, the reciprocating osteotomy device is more stably connected with the human bone, and the cutting process is more stable.

[0021] Optionally, the connecting piece is slidingly connected with the adjusting rod, and the supporting wheel can adjust the expansion angle of the cutting wire when the connecting piece slides towards or away from the fixing sleeve.

[0022] By adopting the above technical scheme, the supporting wheel can also slide on the adjusting rod along with the connecting piece, when the supporting wheel moves away from the fixing sleeve, i.e., moves towards the cut object, the expansion angle of the supporting wire can be adjusted to be larger, and when the supporting wheel moves away from the cut object, the expansion angle of the supporting wire can be adjusted to be smaller, so that the reciprocating osteotomy device can be adapted to cut objects of different sizes and shapes, and cutting is more convenient.

[0023] Optionally, an outer surface of the adjusting rod is provided with an external thread, and the connecting piece is threadedly connected with the adjusting rod.

[0024] By adopting the above technical scheme, the connecting piece and the adjusting rod are directly provided as threadedly connected, the supporting wheel can be moved only by rotating the adjusting piece, the adjusting piece can be self-locked at any position of the adjusting rod, no other locking components are needed, the structure is simple, and the process of adjusting the expansion angle of the cutting wire is also convenient and fast.

[0025] Optionally, a linear slot is formed in the surface of the adjusting rod along the axial direction, the connecting member comprises a connecting rod for connecting the two connecting arms, the connecting rod is rotationally connected with a knob, the knob is sleeved and threadedly connected with the adjusting rod, and a guide column protruding from the connecting rod is arranged to slide in the linear slot.

[0026] By adopting the above technical scheme, the connecting member is threadedly connected with the adjusting rod through the knob, the connecting rod is rotationally connected with the knob, and the guide column on the connecting rod is inserted into the guide slot, so that the knob is not rotated when the knob is rotated, the support wheel and the two tensioning mechanisms are always located in the same plane, the situation that the support wheel deviates during the osteotomy process is avoided, the stability of the osteotomy process is ensured, and the knob does not need to be rotated to correspond to the support wheel and the tensioning mechanism when the expansion angle of the cutting line is adjusted, and the operation is more convenient and fast.

[0027] Optionally, the adjusting rod is slidably connected with the fixing sleeve along the axial direction of the fixing sleeve, and the fixing sleeve is connected with an elastic member for driving the adjusting rod to move away from the fixing sleeve.

[0028] By adopting the above technical scheme, when cutting, the cutting line moves from the outer surface of the cut object to the inside to cut the cut object, the cutting line gradually loosens, and the elastic member can continuously push the adjusting rod to abut against the cut object, so that the cutting line is continuously tensioned, and cutting is quickly and stably performed.

[0029] Optionally, one end of the rotating shaft protrudes from the fixing sleeve and is arranged as a drill connector.

[0030] By adopting the above technical scheme, the drill connector can be directly inserted into a common medical drill, without the need to additionally arrange a self-provided power device or connect a special power device, compared with active medical instruments, the application range is wider, and the cost is lower.

[0031] In summary, the present application has at least one of the following beneficial effects:

[0032] 1. The cutting line around the part of the human bone that needs to be cut is fixed to the sliding shaft, the traction mechanism is limited by the guide slot and the tensioning slot, and when one traction mechanism moves in the forward section to the recovery section, the other traction mechanism moves in the recovery section to the forward section, so that the cutting line reciprocatingly saws along a straight line in a plane to cut the object, the possibility of deviation of the cutting line is reduced, and the cutting precision and efficiency are improved.

[0033] 2. The reciprocating osteotomy device body does not need to swing, avoiding the defect of space limitation.

[0034] 3. The adjusting rod abuts on the cut object, the tensioning mechanism and the elastic member can continuously keep the cutting line in tension state, without additional tensioning the cutting line by manpower, thereby cutting fast and stably, and more labor-saving;

[0035] 4. The reciprocating osteotomy device can be directly inserted into the common medical electric drill through the electric drill connector, without setting the self-powered device or connecting the special powered device, compared with the active medical device, the application range is wider, and the cost is lower. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a structure schematic diagram of the reciprocating osteotomy device in the use state in the embodiment one of the application;

[0037] Figure 2 is a structure schematic diagram of the rotating shaft in the embodiment one of the application;

[0038] Figure 3 is an exploded view of the reciprocating osteotomy device in the embodiment one of the application;

[0039] Figure 4 is a sectional view of the reciprocating osteotomy device along the plane where the cutting line is located in the embodiment one of the application;

[0040] Figure 5 is Figure 4 the greatly enlarged view of A in the embodiment one of the application;

[0041] Figure 6 is a structure schematic diagram of the tensioning mechanism in the embodiment one of the application;

[0042] Figure 7 is a structure schematic diagram of the connecting piece and the knob in the embodiment two of the application.

[0043] EXPLANATION OF REFERENCE NUMERALS: 1, fixed sleeve; 11, pull line groove; 12, protruding part; 13, insertion part; 14, first movable groove; 15, second movable groove; 16, limiting groove; 17, positioning boss; 18, cover; 19, handle; 2, rotating shaft; 21, guide groove; 211, advancing section; 212, returning section; 22, electric drill connector; 3, traction mechanism; 31, ball; 32, sliding sleeve; 321, rolling groove; 322, connecting groove; 33, sliding shaft; 331, clamping groove; 4, tensioning mechanism; 41, connecting piece; 411, connecting arm; 412, connecting rod; 413, supporting wheel; 414, guide column; 415, embedding groove; 42, adjusting rod; 421, supporting surface; 422, external thread; 423, straight groove; 424, third movable groove; 425, accommodating groove; 43, knob; 5, cutting line; 6, elastic member; 7, bearing; 8, shaft check ring; 9, cut object. DETAILED DESCRIPTION

[0044] The application will be further described below with reference to the accompanying drawings. Figures 1-7 The application will be further described below with reference to the accompanying drawings.

[0045] Embodiment one

[0046] With reference to Figure 1 and Figure 2 , the application discloses a reciprocating osteotomy device, which comprises a fixed sleeve 1, a rotating shaft 2, a traction mechanism 3 and a cutting wire 5. The fixed sleeve 1 is provided with two axial pull wire grooves 11 which are symmetrically arranged along the central surface of the fixed sleeve 1. The rotating shaft 2 is rotationally connected to the fixed sleeve 1, and the surface of the rotating shaft 2 is provided with a guide groove 21 which comprises a forward segment 211 and a return segment 212 which are connected in sequence. The traction mechanism 3 is arranged through the pull wire groove 11 in the direction of the axis of the fixed sleeve 1 and is slidingly connected to the guide groove 21. There are two traction mechanisms 3, and when one traction mechanism 3 slides from the forward segment 211 to the return segment 212, the other traction mechanism 3 slides from the return segment 212 to the forward segment 211. The two ends of the cutting wire 5 are fixed to the two traction mechanisms 3 and pass through the part of the human bone which needs to be cut, so that the whole cutting wire 5 is kept in a plane. The traction mechanism 3 is limited by the guide groove 21 and the pull wire groove 11, and the movement directions of the two traction mechanisms 3 are opposite, so that the cutting wire 5 reciprocally saws along a straight line in a plane to cut the object, which reduces the possibility of deviation of the cutting wire 5 and improves the cutting precision and efficiency.

[0047] With reference to Figure 3 and Figure 4 , the fixed sleeve 1 is a hollow cylinder which can be formed by fixedly connecting two half circular shells, so as to facilitate the installation of the internal parts. In addition, the abutting surfaces of the two half circular shells are respectively provided with a protruding part 12 and a plug-in part 13 which can be embedded into each other, so that the two half circular shells can be coaxially positioned and abutted together. The inner cavity of the fixed sleeve 1 comprises a first movable groove 14 for the movement of the rotating shaft 2, the distance between the inner wall of the first movable groove 14 and the outer wall of the rotating shaft 2 is not greater than 1 mm, and the inner wall of the fixed sleeve 1 is provided with an annular positioning boss 17 which protrudes at the slot opening of the first movable groove 14 inside the fixed sleeve 1. The first movable groove 14 penetrates the end surface of the fixed sleeve 1, and the fixed sleeve 1 is provided with a cover 18 which covers the slot opening of the first movable groove 14 at the end surface of the fixed sleeve 1. Further, two handles 19 are symmetrically arranged along the central surface of the fixed sleeve 1 near the cover 18 of the fixed sleeve 1, and the outer wall of the handle 19 is provided with anti-slip protrusions. During the osteotomy operation, the medical staff can hold the handle 19 or fix the handle 19 by using a clamp, and only need to rotate the rotating shaft 2 to realize the reciprocating movement of the cutting wire 5 along a straight line. In an embodiment, the end of the fixed sleeve 1 can directly abut against the object to be cut, and then the cutting wire 5 is adjusted to be in a taut state, so that the cutting wire 5 does not need to be continuously pulled by manpower, and the operation is more convenient.

[0048] With reference to Figure 2 andFigure 4 The rotation shaft 2 is a rotary body, in order to make the rotation shaft 2 rotate more smoothly, the outer diameter of the two ends of the rotation shaft 2 is smaller than the outer diameter of the middle part of the rotation shaft 2, so that the bearing 7 can be fixed to the fixed sleeve 1, and the end of the rotation shaft 2 is tightly clamped with the shaft stop ring 8 abutting against the bearing 7, so that the possibility of the bearing 7 being separated from the bearing 7 along the axis direction of the rotation shaft 2 can be reduced, and the shaft stop ring 8 and the bearing 7 both conform to the design size of the national standard. The bearing 7 and the shaft stop ring 8 are first sleeved on the rotation shaft 2, the rotation shaft 2 is installed in the fixed sleeve 1, and then the cover 18 is fixed to the fixed sleeve 1 by using bolts, the bearings 7 at the two ends of the rotation shaft 2 abut against the positioning boss 17 and the cover 18 respectively, so as to play a role of positioning and installation.

[0049] With reference to Figure 2 The cut object is located at the end of the fixed sleeve 1 away from the handle 19, the pull line groove 11 on the fixed sleeve 1 corresponds to the middle part of the rotation shaft 2 with a larger diameter, the guide groove 21 is also correspondingly arranged at the middle part of the rotation shaft 2, the advancing section 211 is arranged to extend obliquely from the direction close to the cut object to the direction away from the cut object, and the recovery section 212 is arranged to extend obliquely from the direction away from the cut object to the direction close to the cut object; the advancing section 211 and the recovery section 212 can be intersectingly provided with a plurality of, preferably, the number of the advancing section 211 and the recovery section 212 is both arranged as one and symmetrically arranged along the two pull line axial center surfaces, so that when one traction mechanism 3 slides from the advancing section 211 to the recovery section 212, the other traction mechanism 3 slides from the recovery section 212 to the advancing section 211.

[0050] In other embodiments, a fixed power device can be arranged in the fixed sleeve 1 to drive the rotation shaft 2 to rotate, and the power device can be a motor or a rotating cylinder.

[0051] In the embodiment, with reference to Figure 4 The end of the rotation shaft 2 away from the cut object extends out of the fixed sleeve 1 after penetrating through the cover 18, and the extending end is arranged as an electric drill connector 22, the electric drill connector 22 can be directly inserted into a common medical electric drill, without the need to additionally arrange a self-provided power device or connect a special power device, compared with active medical instruments, the application range is wider, the cost is lower, and the weight of the reciprocating osteotomy device is also reduced, which is convenient to use.

[0052] When the rotation shaft 2 rotates, the traction mechanism 3 is simultaneously limited by the guide groove 21 and the pull line groove 11, so as to realize the reciprocating linear motion.

[0053] In other embodiments, the traction mechanism 3 can be directly arranged as an axial body, one end of the axial body abuts against the bottom wall of the guide groove 21, and the other end penetrates through the pull line groove 11.

[0054] In the embodiment, with reference to Figure 5, in order to make the reciprocating motion of the traction mechanism 3 more smooth, the traction mechanism 3 comprises a movable connection ball 31 and a sliding shaft 33, the ball 31 is matched with the rolling in the guide groove 21, and the sliding shaft 33 is matched with the sliding in the sliding groove. The ball 31 can be directly connected with the sliding shaft 33, further, the ball 31 and the sliding shaft 33 are also connected with the sliding sleeve 32, the sliding sleeve 32 is quenched by high-carbon chromium bearing 7 steel and other metal materials with high precision and rigidity, the sliding sleeve 32 is a columnar body, one end surface of the sliding sleeve 32 is provided with a rolling groove 321 for rolling connection of the ball 31, and the other end surface of the sliding sleeve 32 is provided with a connecting groove 322 for entering and fixing the sliding shaft 33; the end of the sliding shaft 33 entering the connecting groove 322 is directly larger, and the end of the sliding shaft 33 protruding from the fixed sleeve 1 is provided with a clamping groove 331 for winding of the cutting line 5, so as to reduce the possibility of the cutting line 5 separating from the sliding shaft 33. Referring to Figure 4 , correspondingly, the fixed sleeve 1 is provided with a limiting groove 16 for sliding of the sliding sleeve 32 along the inner wall of the first movable groove 14 in the axial direction, the end surface of the sliding sleeve 32 facing the sliding shaft 33 abuts against the inner wall of the limiting groove 16, the limiting groove 16 is communicated with the tensioning groove 11 and has the same length, the width of the limiting groove 16 is consistent with the outer diameter of the sliding sleeve 32, and the width of the tensioning groove 11 is consistent with the outer diameter of the sliding shaft 33. The sliding is changed into rolling, the frictional resistance and the abrasion of the traction mechanism 3 and the rotating shaft 2 are reduced, the cutting stability and accuracy are improved, and the situation that the cutting line 5 jumps due to jamming of the traction mechanism 3 is also reduced.

[0055] Further, referring to Figure 6 , the fixed sleeve 1 is also connected with the tensioning mechanism 4, the tensioning mechanism 4 comprises a connecting piece 41 connected with the fixed sleeve 1, the connecting piece 41 comprises two connecting arms 411 symmetrically arranged along the central surface of the fixed sleeve 1 in the axial direction and a connecting rod 412 for connecting the two connecting arms 411, and the end of the connecting arm 411 away from the fixed sleeve 1 is connected with a supporting wheel 413, the supporting wheel 413 can be directly fixed on the connecting arm 411, preferably, the supporting wheel 413 is hinged to the connecting arm 411, and the cutting line 5 is sleeved on the cut object 9 and abuts against the supporting wheel 413. Further, the circumferential side of the supporting wheel 413 is provided with an annular embedding groove 415 for clamping connection of the cutting line 5, so as to reduce the possibility of the cutting line 5 separating from the supporting wheel 413. When cutting the cut object 9, the cutting line 5 abuts against the supporting wheel 413 and is thus stretched, which not only has the tensioning effect, but also avoids that the cutting angle of the cutting line 5 is too small.

[0056] Referring to Figure 4 and Figure 6In order to further adjust the expansion angle of the cutting line 5 to improve the application range of the reciprocating osteotomy device, the tensioning mechanism 4 further comprises an adjusting rod 42 coaxially connected with the fixing sleeve 1, an arc-shaped support surface 421 is arranged on the end face of the adjusting rod 42 away from the fixing sleeve 1, and the support surface 421 abuts against the cut object 9. Since the surface of the human bone is generally arc-shaped, the end face is arranged in an arc shape matched with the human bone, the point contact is converted into surface contact, the connection between the reciprocating osteotomy device and the human bone is more stable, and the cutting process is more stable.

[0057] When the connecting piece 41 slides on the adjusting rod 42, a locking structure is needed. In other embodiments, the connecting piece 41 can directly slide on the adjusting rod 42, and a threaded hole is arranged on the adjusting rod 42 in the axial direction, a bolt is arranged through the connecting piece 41 and screwed in the threaded hole, so as to fix the connecting piece 41. In the embodiment, an external thread 422 is arranged on the outer surface of the adjusting rod 42, the connecting piece 41 is connected to the adjusting rod 42 in a threaded connection mode, and the adjusting piece can be rotated to move the support wheel 413, and the adjusting piece can be self-locked at any position of the adjusting rod 42.

[0058] Specifically, the middle part of the adjusting rod 42 is provided with a third movable slot 424 in the axial direction, and the surface of the adjusting rod 42 is provided with a straight slot 423 and a displacement slot 425 in the axial direction, which are communicated with the third movable slot 424. It should be noted that the center lines of the two displacement slots 425 are located in the same plane as the center lines of the two tensioning slot 11 of the fixed sleeve 1, so as to ensure that the cutting line 5 is located in a plane in the working state. The connecting rod 412 is rotatably connected with the knob 43, and the knob 43 can be provided with a stepped annular groove. The connecting rod 412 has a part that is fitted and clamped into the annular groove to realize the rotary connection. The connecting rod 412 and the connecting arm 411 are arranged in an integrated structure, and then the knob 43 is connected to the connecting rod 412. During installation, the connecting arm 411 is positioned corresponding to the displacement slot 425, and then the connecting arm 411 and the connecting rod 412 are slid into the third movable slot 424. The knob 43 is sleeved and threadedly connected to the adjusting rod 42. In addition, the connecting rod 412 is provided with a guide column 414 protruding therefrom and slidably fitted in the straight slot 423. The straight slot 423 is arranged at the center of the connecting arm 411, and two straight slots 423 can be symmetrically arranged on the center surface of the adjusting rod 42. Correspondingly, two guide columns 414 are arranged to improve the stability of the connecting piece 41 sliding. When the knob 43 rotates, the connecting piece 41 will not rotate, that is, the supporting wheel 413 will not rotate. The supporting wheel 413 and the two tensioning mechanisms 4 are always located in the same plane, avoiding the occurrence of the supporting wheel 413 deviation during the cutting process, ensuring the stability of the cutting process, and avoiding the need to rotate the knob 43 to correspond to the supporting wheel 413 and the tensioning mechanism 4 when adjusting the expansion angle of the cutting line 5, which is more convenient and fast.

[0059] The adjusting rod 42 is fixedly connected with the fixed sleeve 1, but because the cutting line 5 will move from the outer surface of the cut object 9 to the inside during cutting to cut the cut object 9, the cutting line 5 will gradually loosen. Therefore, referring to Figure 4 , the adjusting rod 42 is slidably connected with the fixed sleeve 1 in the axial direction of the fixed sleeve 1. The fixed sleeve 1 is connected with an elastic member 6 that drives the adjusting rod 42 to move away from the fixed sleeve 1. The elastic member 6 can be a rubber pad or a spring, and is preferably a spring with high rigidity. Specifically, the inner cavity of the fixed sleeve 1 further has a second movable slot 15 communicated with the first movable slot 14, and one end of the adjusting rod 42 is movable in the second movable slot 15. One end of the elastic member 6 abuts against the positioning boss 17, and the other end of the elastic member 6 abuts against the end surface of the adjusting rod 42. The end of the adjusting rod 42 entering the second movable slot 15 extends outwardly to a limit ring. The fixed sleeve 1 is provided with a neck at the slot opening of the second movable slot 15 away from the first movable slot 14, so as to cooperate with the limit ring to limit the adjusting rod 42 from disengaging from the fixed sleeve 1. The elastic member 6 can continuously push the adjusting rod 42 against the cut object 9 to achieve a continuously tensioned state of the cutting line 5, thereby rapidly and stably cutting.

[0060] The implementation principle of the embodiment one of the application is:

[0061] Before the osteotomy operation, the electric drill connector 22 of the rotating shaft 2 is directly inserted into the medical electric drill, and the supporting surface 421 of the adjusting rod 42 is abutted on the cut object 9; then one end of the cutting line 5 can be fixed on a sliding shaft 33, the other end of the cutting line 5 is sequentially wound around the supporting wheel 413, the part of the human bone to be cut and the other supporting wheel 413 and then fixed on the other sliding shaft 33, and the length of the cutting line 5 is adjusted to be that one sliding shaft 33 is located at the end of the guide groove 21 closest to the cut object 9, the other sliding shaft 33 is located at the end of the guide groove 21 farthest from the cut object 9, and the whole cutting line 5 is kept in a plane; the medical electric drill drives the rotating shaft 2 to rotate, and the traction mechanism 3 is simultaneously limited by the guide groove 21 and the pull line groove 11, so that the cutting line 5 reciprocatingly saws along a straight line in a plane to cut the object, the possibility of deviation of the cutting line 5 is reduced, the cutting precision and efficiency are improved, and more labor is saved.

[0062] Embodiment two:

[0063] With reference to Figure 7 , the embodiment of the application discloses a reciprocating osteotomy device, which is further optimized on the basis of the embodiment one, the connecting arm 411 and the connecting rod 412 are arranged in a movable connection, the connecting rod 412 is provided with a spring for driving the connecting arm 411 to move away from the connecting rod 412, so that the two supporting wheels 413 continuously have a tendency to move away from each other.

[0064] The implementation principle of the embodiment two of the application is:

[0065] With the progress of the cutting process, the shape of the cutting line 5 will change, and the two supporting wheels 413 can automatically and continuously stretch the cutting line 5 outward to keep the state of being tensioned, the operation is more convenient, and the cutting process is more stable and accurate.

[0066] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A reciprocating osteotomy device, characterized by, The utility model relates to a cutting device for cutting object, which comprises: a fixed sleeve (1) with two axial pull line grooves (11) symmetrically arranged along the axial center surface; a rotating shaft (2) rotatably connected to the fixed sleeve (1), the surface of the rotating shaft (2) is provided with a guide groove (21), the guide groove (21) comprises a forward section (211) and a return section (212) connected in sequence; a traction mechanism (3) penetrating through the pull line groove (11) towards the axial center of the fixed sleeve (1) and being slidably connected to the guide groove (21), the traction mechanism (3) is two, when one of the traction mechanism (3) slides from the forward section (211) to the return section (212), the other traction mechanism (3) slides from the return section (212) to the forward section (211); and a cutting line (5) with two ends respectively fixed to the two traction mechanisms (3). The traction mechanism (3) comprises a movable ball (31) and a sliding shaft (33), the ball (31) is matched and rolled in the guide groove (21), and the sliding shaft (33) is matched and slid in the sliding groove. The fixed sleeve (1) is further connected with a tensioning mechanism (4), the tensioning mechanism (4) comprises a connecting piece (41) connected with the fixed sleeve (1), the connecting piece (41) comprises two connecting arms (411) symmetrically arranged along the axial center surface of the fixed sleeve (1), one end of the connecting arm (411) away from the fixed sleeve (1) is connected with a supporting wheel (413), and the cutting line (5) is sleeved on the object to be cut (9) and abuts against the supporting wheel (413).

2. A reciprocating osteotomy device according to claim 1, wherein, The traction mechanism (3) further comprises a sliding sleeve (32), the ball (31) is rollingly connected in the sliding sleeve (32), the sliding shaft (33) is connected to one end of the sliding sleeve (32) away from the ball (31), and one end surface of the sliding sleeve (32) towards the sliding shaft (33) abuts against the inner wall of the fixed sleeve (1).

3. A reciprocating osteotomy device according to claim 2, wherein, The tensioning mechanism (4) further comprises an adjusting rod (42) coaxially connected with the fixed sleeve (1), one end surface of the adjusting rod (42) away from the fixed sleeve (1) is provided with an arc-shaped supporting surface (421), and the supporting surface (421) abuts against the object to be cut (9).

4. A reciprocating osteotomy device according to claim 3, wherein, The connecting piece (41) is slidably connected to the adjusting rod (42), when the supporting wheel (413) slides towards or away from the fixed sleeve (1) along with the connecting piece (41), the expansion angle of the cutting line (5) can be adjusted.

5. A reciprocating osteotomy device according to claim 4, wherein, An outer thread (422) is arranged on the outer surface of the adjusting rod (42), and the connecting piece (41) is threadedly connected to the adjusting rod (42).

6. A reciprocating osteotomy device according to claim 5, wherein, The surface of the adjusting rod (42) is provided with a linear slot (423) in the axial direction, the connecting piece (41) comprises a connecting rod (412) for connecting the two connecting arms (411), the connecting rod (412) is rotatably connected with a knob (43), the knob (43) is sleeved and threadedly connected on the adjusting rod (42), and the connecting rod (412) is provided with a guide column (414) protruding therefrom and slidingly matched in the linear slot (423).

7. A reciprocating osteotomy device according to claim 6, wherein, The adjusting rod (42) is slidably connected with the fixing sleeve (1) in the axial direction of the fixing sleeve (1), and the fixing sleeve (1) is connected with an elastic member (6) for driving the adjusting rod (42) to move away from the fixing sleeve (1).

8. The reciprocating osteotomy device of claim 1, wherein, One end of the rotating shaft (2) protrudes out of the fixing sleeve (1) and is provided as an electric drill connector (22).

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