Medical power osteotome

Abstract

The invention discloses a medical power osteotome which comprises an electric saw rod outer sleeve (1), one end of the electric saw rod outer sleeve (1) is connected with one end of an electric saw rod assembly, a knife sheath (2) is installed at the other end of the electric saw rod assembly, a driving shaft (3) is rotatably installed in the electric saw rod assembly, and a cam connecting assembly is arranged at one end of the driving shaft (3). A connecting shaft (4) is installed in the electric saw rod outer sleeve (1), a cylindrical cam (5) is arranged on the connecting shaft (4), the cam connecting assembly is connected with the cylindrical cam (5), and a cutter (6) is installed at the other end of the driving shaft (3). The use cost can be effectively reduced, and the problem that heat is generated during working can be solved.

Description

Technical Field

[0001] The invention relates to a bone knife, in particular to a medical power bone knife. Background Art

[0002] In surgical operations, powered bone knives are usually used to cut bones, but traditional bone knives need to be reused, which increases the risk of infection. Disposable bone knives will increase medical costs and waste resources. In addition, powered bone knives will generate a lot of heat when the motor is driving the bone knife to cut the bone, which will cause local high temperature in the bone and damage the nerves around the bone, causing inestimable risks during the operation. Summary of the invention

[0003] The purpose of the present invention is to provide a medical powered osteotome to solve the technical problems in the prior art, which can effectively reduce the use cost and solve the problem of heat generation during operation.

[0004] The present invention provides a medical powered bone knife, comprising an electric saw rod sleeve, one end of the electric saw rod sleeve is connected to one end of an electric saw rod assembly, a tool sheath is installed on the other end of the electric saw rod assembly, a drive shaft is rotatably installed in the electric saw rod assembly, one end of the drive shaft is provided with a cam connecting assembly, a connecting shaft is installed in the electric saw rod sleeve, a cylindrical cam is provided on the connecting shaft, the cam connecting assembly is connected to the cylindrical cam, and a tool head is installed on the other end of the drive shaft.

[0005] Preferably, the electric saw bar cover is a cylindrical structure, the outer wall of the electric saw bar cover is provided with an anti-slip convex ring, and a connecting boss is formed on the outer wall of one end of the electric saw bar cover away from the electric saw bar assembly, and the connecting boss is provided with a connecting groove.

[0006] Preferably, the electric saw rod assembly includes an electric saw outer sleeve, an electric saw inner sleeve and a connecting head, the electric saw outer sleeve is sleeved on the electric saw inner sleeve, and the two are fixedly connected, one end of the connecting head is fixedly connected to one end of the electric saw outer sleeve, and the other end of the connecting head is plugged into and fixedly connected to the electric saw rod outer sleeve.

[0007] Preferably, an opening is provided on the tube wall of the inner sleeve of the electric saw, a second liquid inlet hole is provided on the tube wall of one end of the outer sleeve of the electric saw connected to the connecting head, a liquid flow channel is formed in the connecting head, a first liquid inlet hole is provided on the outer sleeve of the electric saw rod, the first liquid inlet hole is connected to one end of the liquid flow channel, the other end of the liquid flow channel is connected to the second liquid inlet hole, and the second liquid inlet hole is connected to the opening on the inner sleeve of the electric saw.

[0008] Preferably, a bearing fixing plate is fixedly provided in the outer sleeve of the electric saw rod, a bearing is fixedly provided on the bearing fixing plate, the connecting shaft passes through the bearing, and the connecting shaft is interference fit with the inner ring surface of the bearing.

[0009] Preferably, the cam connecting assembly includes a long strip plate, a connecting tube, a connecting rod and a roller, a long strip plate mounting groove is formed in the connecting head, the cross-sectional shape and size of the long strip plate mounting groove are the same as the shape and size of the long strip plate, the long strip plate is slidably installed in the long strip plate mounting groove, the connecting tube and the connecting rod are arranged on both sides of the long strip plate, wherein the connecting tube is located at the center position of the long strip plate, the connecting rod is perpendicular to the long strip plate and is located at one end of the long strip plate, the roller is rotatably installed at the end of the long strip plate by a rotating shaft, and the roller is located in the track groove of the cylindrical cam.

[0010] Preferably, the driving shaft is plugged into and slidably connected with the inner sleeve of the electric saw, one end of the driving shaft is plugged into and fixed with the connecting pipe, and a threaded hole is formed at the other end of the driving shaft.

[0011] Preferably, the tool comprises a threaded column, a round rod and a blade, the threaded column is fixed at one end of the round rod, the blade is fixed at the other end of the round rod, the threaded column is threadedly connected to the threaded hole on the drive shaft, and the round rod is plugged and slidably connected to the tool sheath.

[0012] Preferably, the blade is a right-angled trapezoidal blade, and the beveled edge of the blade is provided with serrations.

[0013] Compared with the prior art, the present invention includes an electric saw bar jacket, one end of which is connected to one end of an electric saw bar assembly, a tool sheath is installed at the other end of the electric saw bar assembly, a drive shaft is rotatably installed in the electric saw bar assembly, a cam connecting assembly is provided at one end of the drive shaft, a connecting shaft is installed in the electric saw bar jacket, a cylindrical cam is provided on the connecting shaft, the cam connecting assembly is connected to the cylindrical cam, and a cutter head is installed at the other end of the drive shaft. When in use, the present invention is connected to a power mobile phone in the prior art, the connecting shaft is driven to rotate by the power mobile phone, and the cylindrical cam on the connecting shaft cooperates with the cam connecting assembly on the driving shaft, so that the driving shaft carries the cutter head to reciprocate along the axial direction, and the cutter head is used to achieve rapid cutting of bone.

[0014] The cutter head of the present invention is threadedly connected to the drive shaft, and the cutter sheath is also threadedly connected to the electric saw rod assembly. The cutter sheath and the cutter head can be made into disposable products, and a new cutter head and cutter sheath can be replaced after each operation. This effectively solves the problem of cross infection caused by incomplete disinfection in the prior art and reduces medical costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1is an axonometric view of the present invention;

[0016] Figure 2 is an exploded view of the present invention;

[0017] Figure 3 It is a half-section structure schematic diagram of the present invention;

[0018] Figure 4 It is a partial structural schematic diagram of the present invention;

[0019] Figure 5 It is a schematic diagram of the structure of the connection position between the cutter head and the drive shaft;

[0020] Figure 6 It is a schematic diagram of the half-section structure of the connector.

[0021] Explanation of the reference numerals: electric saw bar sleeve 1, tool sheath 2, drive shaft 3, connecting shaft 4, cylindrical cam 5, cutter head 6, anti-slip convex ring 7, connecting groove 8, electric saw outer sleeve 9, electric saw inner sleeve 10, connector 11, liquid flow channel 12, second liquid inlet hole 13, bearing fixing plate 14, bearing 15, long strip 16, connecting pipe 17, connecting rod 18, roller 19, long strip mounting groove 20, track groove 21, threaded hole 22, threaded column 23, round rod 24, blade 25, sawtooth 26, I-shaped connecting protrusion 27, first liquid inlet hole 28, opening 29, connecting boss 30. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0023] Embodiments of the present invention: Figure 1-Figure 6 As shown, a medical powered bone knife comprises an electric saw bar sleeve 1, one end of the electric saw bar sleeve 1 is connected to one end of an electric saw bar assembly, a tool sheath 2 is installed at the other end of the electric saw bar assembly, a driving shaft 3 is rotatably installed in the electric saw bar assembly, a cam connecting assembly is provided at one end of the driving shaft 3, a connecting shaft 4 is installed in the electric saw bar sleeve 1, a cylindrical cam 5 is provided on the connecting shaft 4, the cam connecting assembly is connected to the cylindrical cam 5, and a tool head 6 is installed at the other end of the driving shaft 3.

[0024] In this embodiment, the tool sheath 2 and the tool head 6 are both disposable products and are replaced with new ones after being used once, which can effectively solve the problem of cross infection caused by incomplete disinfection.

[0025] The present invention is used in conjunction with a power mobile phone in the prior art. Both the power mobile phone and the power system host are prior art, and their structures are not described in detail in the present invention. The electric saw bar cover 1 is a cylindrical structure, and an anti-slip convex ring 7 is provided on the outer wall of the electric saw bar cover 1. A connecting boss 30 is formed on the outer wall of the end of the electric saw bar cover 1 away from the electric saw bar assembly, and a connecting groove 8 is provided on the connecting boss 30.

[0026] The connection slot 8 is used for the connection block on the power mobile phone to pass through. After the connection block on the power mobile phone passes through the connection slot 8, the electric saw bar cover 1 is rotated, and the connection block is engaged with the connection boss 30, so that the electric saw bar cover 1 and the power mobile phone are fixed together. The end of the connecting shaft 4 has a straight-line connection protrusion 27, and the end of the rotating shaft of the power mobile phone has a groove. When the electric saw bar cover 1 and the power mobile phone are connected in place, the straight-line connection protrusion 27 on the connecting shaft 4 is inserted into the groove on the rotating shaft of the power mobile phone to achieve effective connection.

[0027] When the shaft of the power mobile phone rotates, it drives the connecting shaft 4 to rotate. The cylindrical cam 5 at the end of the connecting shaft 4 cooperates with the cam connecting assembly on the driving shaft 3, so that the driving shaft 3 reciprocates along the axial direction, thereby causing the cutter head 6 to reciprocate to achieve bone cutting.

[0028] In a specific embodiment, the electric saw bar assembly includes an electric saw outer sleeve 9, an electric saw inner sleeve 10 and a connector 11. The electric saw outer sleeve 9 is sleeved on the electric saw inner sleeve 10, and the two are fixedly connected. One end of the connector 11 is fixedly connected to one end of the electric saw outer sleeve 9, and the other end of the connector 11 is plugged into and fixedly connected to the electric saw bar outer sleeve 1.

[0029] The outer diameter of the inner sleeve 10 of the electric saw is equal to the inner diameter of the outer sleeve 9 of the electric saw, and the two are fixedly connected. An opening 29 is provided on the tube wall of the inner sleeve 10 of the electric saw, and a second liquid inlet hole 13 is provided on the tube wall of one end of the outer sleeve 9 of the electric saw connected to the connector 11. A liquid flow channel 12 is formed in the connector 11, and a first liquid inlet hole 28 is provided on the outer sleeve 1 of the electric saw rod. The first liquid inlet hole 28 is connected to one end of the liquid flow channel 12, and the other end of the liquid flow channel 12 is connected to the second liquid inlet hole 13, and the second liquid inlet hole 13 is connected to the opening 29 on the inner sleeve 10 of the electric saw.

[0030] By machining the opening 29 on the inner sleeve 10 of the electric saw, when the inner sleeve 10 of the electric saw is assembled in the outer sleeve 9 of the electric saw, the second liquid inlet hole 13 is connected to the inside of the inner sleeve 10 of the electric saw through the opening 29. During the operation, the flushing pipe of the flushing device is connected to the first liquid inlet hole 28 on the outer sleeve 1 of the electric saw bar, and water is injected into the first liquid inlet hole 28 through the flushing pipe. The water enters the inner sleeve 10 of the electric saw along the liquid flow channel 12 and the second liquid inlet hole 13, and then enters the tool sheath 2 from the end of the inner sleeve 10 of the electric saw, and flows out from the end of the tool sheath 2. The water can take away the heat generated by the drive shaft 3 and the cutter head 6 during operation, and play a role in protecting the nerves around the bones.

[0031] Furthermore, a bearing fixing plate 14 is fixedly disposed in the electric saw bar housing 1 , a bearing 15 is fixedly disposed on the bearing fixing plate 14 , the connecting shaft 4 passes through the bearing 15 , and the connecting shaft 4 and the inner ring surface of the bearing 15 are interference fit.

[0032] After the bearing 15 is installed on the bearing fixing plate 14, it cannot generate axial displacement. Similarly, after the connecting shaft 4 and the bearing 15 are assembled, the connecting shaft 4 cannot generate axial displacement relative to the bearing 15, and the connecting shaft 4 can only rotate. The bearing 15 plays a role in making the connecting shaft 4 rotate smoothly, and also plays a role in preventing the connecting shaft 4 from generating axial displacement.

[0033] The cam connecting assembly includes a long strip plate 16, a connecting tube 17, a connecting rod 18 and a roller 19. A long strip plate mounting groove 20 is formed in the connecting head 11. The cross-sectional shape and size of the long strip plate mounting groove 20 are the same as the shape and size of the long strip plate 16. The long strip plate 16 is slidably installed in the long strip plate mounting groove 20. A connecting tube 17 is fixedly provided on one side of the long strip plate 16, and a connecting rod 18 is fixedly provided on the other side of the long strip plate 16. The connecting tube 17 is located at the center position of the long strip plate 16, that is, the connecting tube 17 is coaxial with the long strip plate 16, the connecting rod 18 is perpendicular to the long strip plate 16 and is located at one end of the long strip plate 16, and the roller 19 is rotatably installed at the end of the long strip plate 16 through a rotating shaft, and the roller 19 is located in the track groove 21 of the cylindrical cam 5.

[0034] The cylindrical cam 5 is a prior art and can be purchased directly. The size of the track groove 21 on the cylindrical cam 5 affects the amplitude of the reciprocating movement of the cutter head 6. Therefore, if there are different requirements for the movement amplitude of the cutter head 6, it can be achieved by replacing the cylindrical cam 5 with a track groove 21 of a suitable size.

[0035] The long plate installation groove 20 is coaxial with the connecting head 11, and the long plate installation groove 20 serves to limit the freedom of the long plate 16, so that the long plate 16 can only move axially in the long plate installation groove 20 and cannot move in other directions, thereby ensuring that the drive shaft 3 can only move axially.

[0036] The connecting rod 18 does not contact the cylindrical cam 5. The function of the connecting rod 18 is to install the roller 19. The roller 19 moves the long strip 16 by cooperating with the track groove 21. The length of the connecting rod 18 should be greater than the unidirectional movement distance of the long strip 16.

[0037] The connecting tube 17 is used to be connected to one end of the driving shaft 3 , and one end of the driving shaft 3 is inserted into the connecting tube 17 and fixed.

[0038] Furthermore, the drive shaft 3 is plugged and slidably connected to the inner sleeve 10 of the electric saw, and one end of the drive shaft 3 is plugged and fixed to the connecting pipe 17. The fixing method can be adhesive fixation, welding fixation, riveting fixation, etc., and a threaded hole 22 is formed at the other end of the drive shaft 3.

[0039] The tool 6 includes a threaded column 23, a round rod 24 and a blade 25. The threaded column 23 is fixed at one end of the round rod 24, and the blade 25 is fixed at the other end of the round rod 24. The threaded column 23 is threadedly connected to the threaded hole 22 on the drive shaft 3, and the round rod 24 is plugged and slidably connected to the tool sheath 2.

[0040] It should be noted that, since water needs to flow out from the end of the tool sheath 2 , the diameter of the round rod 24 should be slightly smaller than the aperture of the tool sheath 2 , and the outer diameter of the drive shaft 3 should be slightly smaller than the aperture of the inner sleeve 10 of the electric saw.

[0041] Preferably, the blade 25 is a right-angled trapezoidal blade, and the bevel of the blade 25 is provided with saw teeth 26. It should be noted that the shape of the blade 25 in this embodiment is only a preferred solution, and the blade 25 can also be designed into other shapes according to needs, such as a rectangular blade, a triangular blade, a conical blade, etc.

[0042] The working principle of the present invention is as follows: when in use, the power electric saw rod sleeve 1 is installed on the power mobile phone. After installation, the straight-line connecting protrusion 27 at the end of the connecting shaft 4 is plugged into the groove at the end of the power mobile phone's rotating shaft, and the power system host is turned on. The rotating shaft of the power mobile phone drives the connecting shaft 4 to rotate, and the cylindrical cam 5 on the connecting shaft 4 rotates. The track groove 21 on the cylindrical cam 5 cooperates with the roller 19, so that the long plate 16 reciprocates in the long plate installation groove 20. When the long plate 16 moves, it moves synchronously with the driving shaft 3 through the connecting tube 17, and the driving shaft 3 moves synchronously with the cutter head 6. When the cutter head 6 reciprocates, the saw teeth 26 thereon cut the bone.

[0043] During surgery, the flushing tube of the flushing device is connected to the first liquid inlet hole 28 on the electric saw rod jacket 1. Water flows through the first liquid inlet hole 28, the liquid flow channel 12, the second liquid inlet hole 13, the electric saw inner sleeve 10, and the tool sheath 2 in sequence, flows out from the end of the tool sheath 2 along the round rod 24 to the blade 25, cooling the bone while cutting.

[0044] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A medical powered osteotome, comprising an electric saw rod jacket (1), characterized in that: One end of the electric saw bar sleeve (1) is connected to one end of the electric saw bar assembly, and the other end of the electric saw bar assembly is installed with a tool sheath (2). A drive shaft (3) is rotatably installed in the electric saw bar assembly, and a cam connecting assembly is provided at one end of the drive shaft (3). A connecting shaft (4) is installed in the electric saw bar sleeve (1), and a cylindrical cam (5) is provided on the connecting shaft (4). The cam connecting assembly is connected to the cylindrical cam (5), and a tool head (6) is installed at the other end of the drive shaft (3).

2. The medical powered osteotome according to claim 1, characterized in that: The electric saw bar cover (1) is a cylindrical structure, and an anti-slip convex ring (7) is provided on the outer wall of the electric saw bar cover (1). A connecting boss (30) is formed on the outer wall of one end of the electric saw bar cover (1) away from the electric saw bar assembly, and a connecting groove (8) is formed on the connecting boss (30).

3. The medical powered osteotome according to claim 1, characterized in that: The electric saw bar assembly comprises an electric saw outer sleeve (9), an electric saw inner sleeve (10) and a connector (11); the electric saw outer sleeve (9) is sleeved on the electric saw inner sleeve (10), and the two are fixedly connected; one end of the connector (11) is fixedly connected to one end of the electric saw outer sleeve (9), and the other end of the connector (11) is plugged into and fixedly connected to the electric saw bar outer sleeve (1).

4. The medical powered osteotome according to claim 3, characterized in that: An opening (29) is provided on the wall of the inner sleeve (10) of the electric saw, a second liquid inlet hole (13) is provided on the wall of one end of the outer sleeve (9) of the electric saw connected to the connector (11), a liquid flow channel (12) is formed in the connector (11), a first liquid inlet hole (28) is provided on the outer sleeve (1) of the electric saw rod, the first liquid inlet hole (28) is connected to one end of the liquid flow channel (12), the other end of the liquid flow channel (12) is connected to the second liquid inlet hole (13), and the second liquid inlet hole (13) is connected to the opening (29) on the inner sleeve (10) of the electric saw.

5. The medical powered osteotome according to claim 1, characterized in that: A bearing fixing plate (14) is fixedly disposed inside the electric saw rod outer sleeve (1), a bearing (15) is fixedly disposed on the bearing fixing plate (14), the connecting shaft (4) passes through the bearing (15), and the connecting shaft (4) is interference-fitted with an inner ring surface of the bearing (15).

6. The medical powered osteotome according to claim 3, characterized in that: The cam connection assembly comprises a long strip plate (16), a connecting tube (17), a connecting rod (18) and a roller (19); a long strip plate installation groove (20) is formed in the connecting head (11); the cross-sectional shape and size of the long strip plate installation groove (20) are the same as the shape and size of the long strip plate (16); the long strip plate (16) is slidably installed in the long strip plate installation groove (20); the connecting tube (17) and the connecting rod (18) are arranged on both sides of the long strip plate (16); the connecting tube (17) is located at the center of the long strip plate (16); the connecting rod (18) is perpendicular to the long strip plate (16) and is located at one end of the long strip plate (16); the roller (19) is rotatably installed at the end of the long strip plate (16) via a rotating shaft; and the roller (19) is located in the track groove (21) of the cylindrical cam (5).

7. The medical powered osteotome according to claim 6, characterized in that: The drive shaft (3) is plugged into and slidably connected with the inner sleeve (10) of the electric saw, one end of the drive shaft (3) is plugged into and fixed with the connecting pipe (17), and the other end of the drive shaft (3) is formed with a threaded hole (22).

8. The medical powered osteotome according to claim 7, characterized in that: The tool (6) comprises a threaded column (23), a round rod (24) and a blade (25); the threaded column (23) is fixedly arranged at one end of the round rod (24); the blade (25) is fixedly arranged at the other end of the round rod (24); the threaded column (23) is threadedly connected to the threaded hole (22) on the drive shaft (3); and the round rod (24) is plug-connected and slidably connected to the tool sheath (2).

9. The medical powered osteotome according to claim 8, characterized in that: The blade (25) is a right-angled trapezoidal blade, and saw teeth (26) are provided on the oblique edge of the blade (25).

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