Multifunctional electrotome

Abstract

The utility model relates to the technical field of medical instruments, in particular to a multifunctional electrotome which is simple in structure, the length of a tool bit can be adjusted, the tool bit can be fixed, the tool bit can be bent and rotate, and the practicability of the electrotome is improved. Comprising a cutter bar and an electrode sliding relative to the cutter bar, multiple grooves are formed in the surface of the electrode in the axis direction, first balls are elastically connected to the end, close to the tool bit, of the tool bar, and a small part of the first balls are located in the grooves. The end, close to the tool bit, of the electrode is connected with a plurality of elastic pieces, the adjacent elastic pieces are spaced, one end of the tool bit is connected with a second ball, and the second ball makes contact with the inner walls of the arc parts of the elastic pieces.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a multifunctional electric knife. Background Art

[0002] The electrosurgical unit is an electrosurgical device that replaces mechanical scalpels for tissue cutting. It heats the tissue when it comes into contact with the body through the high-frequency (usually 200kHz to 3MHz) high-voltage current generated by the effective electrode tip, achieving the purpose of cutting and hemostasis by separating and coagulating the body tissue.

[0003] The following disadvantages are found in the use of the electric knife in the prior art: first, the length of the blade head of some electric knives can be adjusted relative to the blade rod, but it does not have a locking function and will retract when slightly resisted by the tissue; second, although the blade head can be extended and retracted, its moving direction relative to the blade rod is parallel to the blade rod, and the blade head cannot rotate, which is inconvenient when cutting tissue close to the doctor's side during thoracoscopic surgery. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a multifunctional electric knife with a simple structure. The length of the knife head can be adjusted and fixed, and the knife head can not only be bent but also rotated, thereby improving the practicality of the electric knife.

[0005] The utility model discloses a multifunctional electric knife, comprising a knife bar and an electrode sliding relative to the knife bar, wherein a knife head is arranged at one end of the electrode away from the knife bar; a plurality of grooves are arranged on the surface of the electrode along the axial direction thereof, and a ball bearing is elastically connected to one end of the knife bar close to the knife head, and a small portion of the ball bearing is in the groove;

[0006] A plurality of spring sheets are connected to one end of the electrode close to the cutter head, and there is a spacing between adjacent spring sheets. A second ball is connected to one end of the cutter head, and the second ball contacts the inner wall of the arc portion of the spring sheet.

[0007] Furthermore, the spring piece further comprises a deformation portion connected to the arc portion, and the deformation portion is connected to the end of the electrode;

[0008] The surface of the deformation part is provided with threads, and the electrode sleeve is provided with nuts matched with the threads.

[0009] Furthermore, the spring piece also includes a flared portion, and the flared portion is connected to the arc portion.

[0010] Furthermore, the electrode is made of magnesium-aluminum alloy.

[0011] Furthermore, a long groove is provided on the surface of the electrode along the axis direction of the electrode, and a protrusion extending into the long groove is provided inside the knife rod.

[0012] Furthermore, the surface of the electrode is wrapped with an insulating sleeve.

[0013] Furthermore, the spring piece is made of insulating material.

[0014] Furthermore, an extension portion is provided at one end of the electrode close to the cutter head, and an end surface of the extension portion contacts the second ball.

[0015] Compared with the prior art, the utility model has the following beneficial effects: first, by setting the ball one and the groove, the relative position of the electric head and the knife rod can be locked, so that the knife head will not retreat when encountering human tissue; second, the knife head can rotate over a large range around the center of the ball two, and the electrode is made of magnesium-aluminum alloy, which can quickly position the knife head to the desired state, making it more usable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 A partial enlarged view of the middle A part;

[0018] Figure 3 yes Figure 1 A front view of

[0019] Figure 4 yes Figure 3 Cross-section at the middle BB;

[0020] Figure 5 yes Figure 3 A partial enlarged view of the middle C part;

[0021] Figure 6 yes Figure 4 A partial enlarged view of the middle D part;

[0022] Figure 7 is a cross-sectional view of the electrode, the tool bar, and the protrusion;

[0023] Markings in the accompanying drawings: 1. tool rod; 2. electrode; 3. tool head; 4. groove; 5. ball one; 6. fixing ring; 7. spring; 8. support plate; 9. spring; 10. ball two; 11. arc portion; 12. deformation portion; 13. thread; 14. nut; 15. flared portion; 16. protrusion; 17. insulating sleeve; 18. extension portion. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] like Figures 1 to 7As shown, a multifunctional electric knife of the utility model comprises a knife bar 1 and an electrode 2 sliding relative to the knife bar 1, wherein a knife head 3 is arranged at one end of the electrode 2 away from the knife bar 1; a plurality of grooves 4 are arranged on the surface of the electrode 2 along the axial direction thereof, and a ball 5 is elastically connected to one end of the knife bar 1 close to the knife head 3. More specifically, as Figure 1 , Figure 2 and Figure 6 As shown, in order to reduce the required thickness of the shank 1, a fixing ring 6 is connected to one end of the shank 1 close to the cutter head 3, a through hole is provided on the shank 1, the fixing ring 6 is connected to the through hole, and a spring 7 is placed in the through hole, the end of the fixing ring 6 is connected to the support sheet 8 by a screw, and the two ends of the spring 7 are in contact with the ball 1 5 and the support sheet 8 respectively, and under the elastic force of the spring 7, a small part of the ball 1 5 is in the groove 4;

[0026] A plurality of spring pieces 9 are connected to one end of the electrode 2 close to the cutter head 3, and there is a spacing between adjacent spring pieces 9. A second ball 10 is connected to one end of the cutter head 3, and the second ball 10 contacts the inner wall of the arc portion 11 of the spring piece 9.

[0027] In this embodiment, the positions of the electrode 2 and the cutter head 3 relative to the cutter rod 1 can be adjusted, so that the relative positions of the cutter head 3 and the cutter rod 1 can be adjusted, that is, the length of the entire electric knife can be adjusted. When the position of the cutter head 3 needs to be fixed, the electrode 2 and the cutter head 3 are slightly moved along the axial direction of the cutter rod 1. Under the elastic force of the spring 7, the ball 1 5 enters the groove 4. Since a small part of the ball 1 5 is in the groove 4, the ball 1 5 can be completely in the through hole under the action of a large external force, so that the position of the electrode 2 and the cutter rod 1 can be changed, but the resistance of the human tissue is small, which will not cause the position of the electrode 2 to change, so that the position of the cutter head 3 is fixed;

[0028] like Figure 6 As shown, the ball 2 10 contacts the inner wall of the arc portion 11 of the spring 9. Since the ball 2 10 can rotate relative to the spring 9, the cutter head 3 can also rotate to adjust the angle of the cutter head 3. Due to the use of the ball 2 10 and the spring 9, the adjustable angle of the cutter head 3 is greatly increased, thereby improving practicality.

[0029] Furthermore, if Figure 2 , Figure 5 and Figure 6 As shown, the spring piece 9 further includes a deformation portion 12 connected to the arc portion 11, and the deformation portion 12 is connected to the end of the electrode 2;

[0030] The surface of the deformed portion 12 is provided with a thread 13, and the electrode 2 is provided with a nut 14 that matches the thread 13;

[0031] Furthermore, the spring piece 9 further includes a flared portion 15, and the flared portion 15 is connected to the arc portion 11;

[0032] In this embodiment, when the cutter head 3 is installed, the cutter head 3 is held and the ball 10 is inserted into the spring sheet 9. The ball 10 first passes through the flared portion 15. The purpose of setting the flared portion 15 is to guide the ball 10 and make the spring sheet 9 more easily deformed. Then the ball 10 reaches the arc portion 11, and the inner wall of the arc portion 11 is tightly attached to the outer wall of the ball 10. At this time, the ball 10 is in contact with the electrode 2. Even if the ball 10 rotates, it will not affect the use of the cutter head 3.

[0033] After the angle of the ball 2 10 is adjusted, the nut 14 is rotated to engage with the thread 13 , so as to prevent the spring sheet 9 from being deformed, thereby fixing the angle of the ball 2 10 .

[0034] Further, the electrode 2 is made of magnesium-aluminum alloy;

[0035] In this embodiment, the magnesium-aluminum alloy has excellent strength, rigidity and dimensional stability. The doctor can fold the electrode 2 into any shape according to the cutting position and cooperate with the rotation of the cutter head 3 so that the cutter head 3 can better reach the cutting position. The magnesium-aluminum alloy has good conductivity and will not affect the transmission of electricity. The electric knife is a disposable product. If the electrode cannot be folded into the original shape, a new electric knife needs to be used.

[0036] Furthermore, if Figure 7 As shown, along the axial direction of the electrode 2, a long groove is provided on the surface of the electrode 2, and a protrusion 16 extending into the long groove is provided inside the knife rod 1;

[0037] In this embodiment, when the electrode 2 moves relative to the knife rod 1, the protrusion 16 moves in the long groove, and the electrode 2 does not rotate, so that the ball 1 5 and the groove 4 will not be misaligned.

[0038] Furthermore, if Figure 4 , Figure 6 and Figure 7 As shown, the surface of the electrode 2 is wrapped with an insulating sleeve 17;

[0039] In this embodiment, the surface of the electrode 2 is wrapped with an insulating sleeve 17, so that electric shock will not occur during use, effectively protecting the safety of the doctor.

[0040] Furthermore, the spring piece 9 is made of insulating material;

[0041] In this embodiment, the spring piece 9 is made of insulating material, so that even if the doctor touches the spring piece 9 by mistake, no electric shock will occur, thereby improving safety.

[0042] Furthermore, if Figure 6 As shown, an extension portion 18 is provided at one end of the electrode 2 close to the cutter head 3, and the end surface of the extension portion 18 is in contact with the ball 2 10;

[0043] In this embodiment, if Figure 6 As shown, the end face of the extension portion 18 is arc-shaped. When the ball 10 rotates, the contact area between the electrode 2 and the ball 10 is increased, thereby improving the conductivity. When the ball 10 contacts the extension portion 18, the ball 10 is located exactly on the arc portion 11, which also serves to position the ball 10, thereby making the installation of the cutter head 3 more convenient.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A multifunctional electric knife, comprising a knife rod (1) and an electrode (2) sliding relative to the knife rod (1), wherein a knife head (3) is arranged at one end of the electrode (2) away from the knife rod (1); characterized in that: The surface of the electrode (2) is provided with a plurality of grooves (4) along its axial direction; a ball (5) is elastically connected to one end of the cutter rod (1) close to the cutter head (3); a small portion of the ball (5) is located in the groove (4); A plurality of spring sheets (9) are connected to one end of the electrode (2) close to the cutter head (3), and there is a spacing between adjacent spring sheets (9). A second ball (10) is connected to one end of the cutter head (3), and the second ball (10) contacts the inner wall of the arc portion (11) of the spring sheet (9).

2. A multifunctional electric knife as claimed in claim 1, characterized in that: The spring piece (9) further comprises a deformation portion (12) connected to the arc portion (11), and the deformation portion (12) is connected to the end of the electrode (2); The surface of the deformed portion (12) is provided with a thread (13), and the electrode (2) is sleeved with a nut (14) that matches the thread (13).

3. A multifunctional electric knife as claimed in claim 2, characterized in that: The spring piece (9) further comprises a flared portion (15), wherein the flared portion (15) is connected to the arc portion (11).

4. A multifunctional electric knife as claimed in claim 3, characterized in that: The electrode (2) is made of magnesium-aluminum alloy.

5. A multifunctional electric knife as claimed in claim 4, characterized in that: A long groove is provided on the surface of the electrode (2) along the axis direction of the electrode (2), and a protrusion (16) extending into the long groove is provided inside the knife rod (1).

6. A multifunctional electric knife as claimed in claim 5, characterized in that: The surface of the electrode (2) is wrapped with an insulating sleeve (17).

7. A multifunctional electric knife as claimed in claim 6, characterized in that: The spring piece (9) is made of insulating material.

8. A multifunctional electric knife as claimed in claim 7, characterized in that: An extension portion (18) is provided at one end of the electrode (2) close to the cutter head (3), and an end surface of the extension portion (18) is in contact with the second ball (10).

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