Surgical knife for minimally invasive surgery

Abstract

The minimally invasive surgical knife comprises a knife handle body, a blade body, a first clamping assembly and a second clamping assembly, when the blade body is installed on the knife handle body, an installation groove of the blade body is arranged outside an installation portion of the knife handle body in a surrounding mode, then the knife handle body is pushed, and the first clamping assembly and the second clamping assembly are clamped. And then the second clamping assembly is pushed, the installation groove is pushed to be close to the notch edge of the knife handle body so as to abut against the knife handle body, and installation of the blade body is completed. For the knife handle body, a threaded hole does not need to be formed in the surface of the knife handle body, and the first clamping assembly and the second clamping assembly coincide with the blade body in the thickness direction, so that the whole minimally invasive surgical knife is lighter and thinner. Therefore, the scalpel for minimally invasive surgery has the advantages of being light and thin while the blade is easy to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of minimally invasive surgical cutter structures, in particular to a minimally invasive surgical cutter. Background Art

[0002] Minimally invasive surgery, also known as small incision surgery or laparoscopic surgery, is a less traumatic surgical method compared to traditional open surgery. Among them, minimally invasive surgical tools play an important role in this type of surgery and need to provide precise cutting capabilities. Therefore, minimally invasive surgical tools generally use fastening structures such as threaded connections to install the blades on the handles, making it easier for surgeons to choose the appropriate blades based on actual conditions.

[0003] Generally speaking, minimally invasive surgical tools need to reserve enough thickness for threaded holes for bolt connection, which makes it difficult to further reduce the thickness of minimally invasive surgical tools. Therefore, how to reduce the thickness of minimally invasive surgical tools while ensuring that the blades are easy to replace is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] The utility model aims to provide a minimally invasive surgical knife to solve the technical problem that the minimally invasive surgical knife in the prior art is relatively thick in order to realize easy replacement of the blade.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A minimally invasive surgical knife, comprising:

[0007] A handle body, wherein a mounting portion is provided on the handle body;

[0008] A blade body, wherein the blade body is provided with a mounting groove, and the mounting groove is arranged outside the mounting portion;

[0009] A first clamping assembly, wherein the first clamping assembly is provided with a clamping groove, wherein the clamping groove is used for clamping an edge of a notch of the mounting groove away from the handle body;

[0010] The second clamping assembly is movably mounted on the mounting portion and is used to push the mounting slot close to the notch edge of the handle body so as to abut against the handle body.

[0011] Optionally, the mounting portion includes a mounting block protruding from the handle body, and the mounting block extends along a first direction; the mounting groove includes a first sliding groove slidably connected to the mounting block.

[0012] Optionally, the first clamping assembly is arranged on a side of the mounting portion away from the shank body, and the notch of the clamping slot is arranged away from the mounting portion for the notch edge of the first sliding slot to be clamped into.

[0013] Optionally, the mounting portion is provided with a push-slide groove extending along the first direction, and the second clamping assembly includes a sliding rod slidably connected to the push-slide groove;

[0014] A plurality of clamping blocks are protruding from the mounting block, and the plurality of clamping blocks are sequentially arranged along the first direction; a clamping portion is also connected to the sliding rod, and the clamping portion is clamped on the clamping block;

[0015] The end of the sliding rod is used to push the installation slot close to the notch edge of the handle body so as to abut against the handle body.

[0016] Optionally, a pushing portion is connected to the end of the sliding rod, and a pushing top portion and a pushing bottom portion are protruding from the side of the pushing portion facing the handle body, and a pushing groove is formed between the pushing top portion and the pushing bottom portion; the pushing groove is used for the installation groove to be inserted into the edge of the groove close to the handle body.

[0017] Optionally, the pushing top end portion includes a fan-shaped block.

[0018] Optionally, along a direction perpendicular to the blade body, a projection of the pushing top end portion falls into the pushing bottom end portion; and a plurality of strip grooves are provided on the pushing bottom end portion, and the plurality of strip grooves are spaced apart along the first direction.

[0019] Optionally, an abutment bevel is formed on the handle body, and the blade body includes a mounting bevel matching the abutment bevel.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The minimally invasive surgical tool provided by the utility model, when installing the blade body on the handle body, firstly surround the installation groove outside the installation part, then push the blade body so that the edge of the notch of the installation groove away from the handle body is initially inserted into the clamping groove, and then push the second clamping assembly to push the edge of the notch of the installation groove close to the handle body to abut on the handle body, so as to complete the installation of the blade body. For the handle body, there is no need to open a threaded hole on its surface, and the first clamping assembly and the second clamping assembly are both overlapped with the blade body in the thickness direction, so that the minimally invasive surgical tool is lighter and thinner as a whole. Therefore, the minimally invasive surgical tool has the advantages of being lighter and thinner while realizing easy replacement of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0024] Figure 1 A schematic diagram of the overall structure of a minimally invasive surgical tool provided by an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the partial structure of a minimally invasive surgical tool provided in an embodiment of the utility model;

[0026] Figure 3 A schematic diagram of a partial explosion structure of a minimally invasive surgical tool provided by an embodiment of the utility model;

[0027] Figure 4 for Figure 3 Schematic diagram of the local enlarged structure at point A.

[0028] Illustrations: 10, handle body; 11, mounting portion; 12, mounting block; 13, push slide; 14, clamping block; 15, extension block; 16, abutting inclined surface;

[0029] 20. Blade body; 21. Mounting slot; 22. First sliding slot; 23. Second sliding slot; 24. Mounting bevel; 30. First clamping assembly; 31. Clamping slot;

[0030] 40. Second clamping assembly; 41. Sliding rod; 42. Clamping portion; 43. Pushing portion; 44. Pushing top end portion; 45. Pushing bottom end portion; 46. Pushing groove; 47. Strip groove. DETAILED DESCRIPTION

[0031] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0033] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0034] like Figures 1 to 4 As shown, Figure 1 This is a schematic diagram of the overall structure of a minimally invasive surgical tool provided by an embodiment of the utility model. Figure 2 A schematic diagram of the partial structure of a minimally invasive surgical tool provided in an embodiment of the utility model. Figure 3 This is a schematic diagram of the partial explosion structure of a minimally invasive surgical tool provided by an embodiment of the utility model. Figure 4 for Figure 3 Schematic diagram of the local enlarged structure at point A.

[0035] The minimally invasive surgical tool provided in this embodiment is used in minimally invasive surgery. In this embodiment, the structure of the minimally invasive surgical tool is improved so that the blade is easy to replace and the overall size is lighter and thinner.

[0036] like Figure 1 to Figure 2As shown, the minimally invasive surgical tool in this embodiment includes a handle body 10, a blade body 20, a first clamping assembly 30 and a second clamping assembly 40; a mounting portion 11 is provided on the handle body 10, and the handle body 10 can be held by a surgeon, and an extension block 15 is provided on the handle body 10, and the mounting portion 11 can be provided on the extension block 15 for mounting the blade body 20; the blade body 20 is provided with a mounting groove 21, and the mounting groove 21 is surrounded by the mounting portion 11; the first clamping assembly 30 is configured with a clamping groove 31, and the clamping groove 31 is used for the mounting groove 21 to be clamped into the groove edge away from the handle body 10; the second clamping assembly 40 can be movably mounted on the mounting portion 11, and is used to push the mounting groove 21 close to the groove edge of the handle body 10 to abut against the handle body 10.

[0037] Specifically, when the minimally invasive surgical tool in this embodiment is installed on the handle body 10, the installation groove 21 is firstly arranged outside the installation portion 11, and then the blade body 20 is pushed so that the edge of the notch of the installation groove 21 away from the handle body 10 is initially inserted into the clamping groove 31, and then the second clamping assembly 40 is pushed to push the installation groove 21 close to the notch edge of the handle body 10 to abut against the handle body 10, and the installation of the blade body 20 is completed. For the handle body 10, there is no need to open a threaded hole on its surface, and the first clamping assembly 30 and the second clamping assembly 40 are overlapped with the blade body 20 in the thickness direction, so that the minimally invasive surgical tool is thinner and lighter as a whole. Therefore, the minimally invasive surgical tool has the advantages of being thinner and lighter while realizing easy replacement of the blade.

[0038] Furthermore, if Figures 2 to 4 As shown, the mounting portion 11 includes a mounting block 12 protruding from the handle body 10, and the mounting block 12 extends along the first direction; the mounting groove 21 includes a first sliding groove 22 slidably connected to the mounting block 12, and also includes a second sliding groove 23, the groove width of the second sliding groove 23 is greater than the groove width of the first sliding groove 22, and is used to avoid the second clamping component 40, that is, when the blade body 20 is installed outside the mounting portion 11, the first sliding groove 22 can be firstly sleeved on the outside of the mounting block 12 to provide a preliminary limit for the blade body 20, so that the blade body 20 can slide along the first direction.

[0039] In this embodiment, the first clamping assembly 30 is disposed on a side of the mounting portion 11 away from the handle body 10, and the notch of the clamping groove 31 is disposed away from the mounting portion 11, for the notch edge of the first sliding groove 22 to be clamped in. It can be understood that when the blade body 20 is mounted outside the mounting portion 11, the blade body 20 can be pushed so that the blade body 20 moves in a direction close to the handle body 10, and at this time, the notch edge of the first sliding groove 22 is clamped in the clamping groove 31 to limit the movement of the blade body 20 in the thickness direction.

[0040] In this embodiment, a push-slide groove 13 extending along the first direction is opened on the mounting portion 11, and the second clamping assembly 40 includes a sliding rod 41 slidably connected to the push-slide groove 13; a plurality of clamping blocks 14 are protruding from the outside of the mounting block 12, and the plurality of clamping blocks 14 are arranged in sequence along the first direction; a clamping portion 42 is also connected to the sliding rod 41, and the clamping portion 42 is clamped on the clamping block 14; the end of the sliding rod 41 is used to push the mounting groove 21 close to the notch edge of the handle body 10 so as to abut the blade body 20 against the handle body 10. It can be understood that after the groove edge of the first sliding groove 22 is initially inserted into the engaging groove 31, the sliding rod 41 can be pushed by manually applying external force, so that the engaging portion 42 passes through multiple engaging blocks 14 along the first direction, and after the blade body 20 is abutted against the handle body 10 at the end of the sliding rod 41, the external force is removed, so that the sliding rod 41 is clamped by the engaging block 14 to abut the blade body 20 against the handle body 10. At the same time, the groove edge of the first sliding groove 22 completely enters the engaging groove 31, and at this time the blade body 20 can be firmly installed on the handle body 10.

[0041] Furthermore, a push portion 43 is connected to the end of the sliding rod 41, and a push top portion 44 and a push bottom portion 45 are convexly provided on the side of the pushing portion 43 facing the handle body 10, and a push groove 46 is formed between the push top portion 44 and the push bottom portion 45; the push groove 46 is used for the slot edge of the mounting slot 21 close to the handle body 10 to be inserted. It can be understood that when the sliding rod 41 is pushed, the push groove 46 is first sleeved outside the slot edge of the mounting slot 21 close to the handle body 10, that is, sleeved outside the slot edge of the second sliding slot 23, and then the blade body 20 is pushed by the push portion 43, which has the advantage of high stability.

[0042] Specifically, Figure 3 and Figure 4 As shown, the push top end portion 44 includes a fan-shaped block. Along the direction perpendicular to the blade body 20, the projection of the push top end portion 44 falls into the push bottom end portion 45; and the push bottom end portion 45 is provided with a plurality of strip grooves 47, and the plurality of strip grooves 47 are arranged at intervals along the first direction. It can be understood that the push bottom end portion 45 has a certain elasticity due to the provision of the strip grooves 47, so that the push groove 46 can more conveniently make the installation groove 21 close to the notch edge of the handle body 10 and make the overall weight lighter, and cooperate with the fan-shaped block on the top to limit the stable position of the blade body 20.

[0043] On the basis of the above embodiment, an abutting bevel 16 is formed on the handle body 10 , and the blade body 20 includes a mounting bevel 24 matching the abutting bevel 16 .

[0044] To facilitate the understanding of those skilled in the art, the installation process of the blade body 20 of the minimally invasive surgical tool is described below:

[0045] 1. First, the mounting groove 21 of the blade body 20 is sleeved outside the mounting portion 11. At this time, the edge of the first sliding groove 22 does not contact the clamping groove 31;

[0046] 2. Push the blade body 20 in the direction close to the handle body 10 so that the edge of the first sliding groove 22 initially enters the engaging groove 31;

[0047] 3. Push the sliding rod 41 so that the clamping portion 42 passes through a plurality of clamping blocks 14 to drive the pushing portion 43 to slide. During the sliding process of the pushing portion 43, the top end portion 44 and the bottom end portion 45 can be pushed to be sleeved outside the notch edge of the second sliding groove 23, thereby synchronously pushing the blade body 20;

[0048] 4. When the abutting bevel 16 contacts the mounting bevel 24, the sliding rod 41 reaches the limit position and can no longer be pushed forward, so that the position of the sliding rod 41 is locked by the clamping portion 42 and the clamping block 14, which can also prevent the blade body 20 from loosening. In addition, at this time, the groove edge of the first sliding groove 22 is completely in contact with the clamping groove 31, thereby making both ends of the blade body 20 firmly clamped, and the blade body 20 is firmly installed without bolts.

[0049] In summary, the minimally invasive surgical tool provided in this embodiment has the advantages of small and compact structure, high stability, and easy replacement of blades.

[0050] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A minimally invasive surgical tool, characterized in that: include: A handle body (10), wherein a mounting portion (11) is provided on the handle body (10); A blade body (20), wherein the blade body (20) is provided with a mounting groove (21), and the mounting groove (21) is arranged outside the mounting portion (11); A first clamping assembly (30), the first clamping assembly (30) being provided with a clamping groove (31), the clamping groove (31) being used for a notch edge of the mounting groove (21) away from the knife handle body (10) to be clamped into; a second clamping assembly (40), the second clamping assembly (40) being movably mounted on the mounting portion (11) and used for pushing the mounting slot (21) close to the slot edge of the handle body (10) so as to abut against the handle body (10); The mounting portion (11) comprises a mounting block (12) protruding from the handle body (10), the mounting block (12) extending along a first direction; the mounting groove (21) comprises a first sliding groove (22) slidably connected to the mounting block (12); The mounting portion (11) is provided with a push slide groove (13) extending along the first direction, and the second clamping assembly (40) comprises a sliding rod (41) slidably connected to the push slide groove (13); A plurality of clamping blocks (14) are protruding from the outside of the mounting block (12), and the plurality of clamping blocks (14) are arranged in sequence along the first direction; a clamping portion (42) is also connected to the sliding rod (41), and the clamping portion (42) is clamped on the clamping block (14); The end of the sliding rod (41) is used to push the installation slot (21) close to the notch edge of the handle body (10) so as to abut against the handle body (10).

2. A minimally invasive surgical tool according to claim 1, characterized in that: The first clamping assembly (30) is arranged on a side of the mounting portion (11) away from the handle body (10), and the notch of the clamping slot (31) is arranged away from the mounting portion (11) for being clamped into the notch edge of the first sliding slot (22).

3. A minimally invasive surgical tool according to claim 1, characterized in that: A pushing portion (43) is connected to the end of the sliding rod (41), and a pushing top portion (44) and a pushing bottom portion (45) are protruding from the pushing portion (43) on a side facing the handle body (10), and a pushing groove (46) is formed between the pushing top portion (44) and the pushing bottom portion (45); the pushing groove (46) is used for the installation groove (21) to be inserted into the groove edge close to the handle body (10).

4. A minimally invasive surgical tool according to claim 3, characterized in that: The pushing top end portion (44) comprises a fan-shaped block.

5. The minimally invasive surgical tool according to claim 4, characterized in that: Along a direction perpendicular to the blade body (20), a projection of the pushing top end portion (44) falls into the pushing bottom end portion (45); and a plurality of strip grooves (47) are provided on the pushing bottom end portion (45), and the plurality of strip grooves (47) are arranged at intervals along the first direction.

6. A minimally invasive surgical tool according to any one of claims 1 to 5, characterized in that: An abutment bevel (16) is formed on the handle body (10), and the blade body (20) comprises a mounting bevel (24) matching the abutment bevel (16).

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