Disposable scalpel capable of preventing mistaken locking

Abstract

The disposable scalpel comprises a scalpel rest, a blade and a protective sleeve, one end of the scalpel rest is a connecting part, and the other end of the scalpel rest is a handheld part; the end, away from the cutting edge, of the blade is arranged on the connecting part, and the protective sleeve sleeves the connecting part and can move back and forth in the direction of the blade. The protective sleeve further comprises a locking and clamping structure, the locking and clamping structure comprises a locking piece arranged on the protective sleeve and a locking groove formed in the connecting part, and a locking block is arranged on the side wall of the locking groove; the locking piece corresponds to the locking groove in shape, and the locking piece can be inserted into the locking groove through pressing and locked through the locking block. According to the scalpel designed by the utility model, the locking piece is prevented from entering the locking groove through the limiting effect of the locking block before the scalpel is used, and an operator needs to move the groove position on the basis of an initial position to meet the condition that the locking piece is pressed downwards to enter the locking groove, so that the condition that the scalpel is locked and scrapped before being used due to misoperation is avoided; and the waste of tools is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, specifically relating to a disposable surgical knife that prevents accidental locking. Background Technology

[0002] A scalpel is a specialized cutting tool consisting of a blade and a handle, used for cutting human or animal tissues. It is an indispensable surgical instrument. Existing disposable scalpels have a sheath covering the blade. During use, the operator lowers the sheath to expose the blade. After the surgery, the sheath is raised back up, placing the blade back inside. The sheath is then locked onto the handle by pressing before disposal.

[0003] However, existing scalpels often become unusable due to operator error, causing them to lock before use (with the sheath in its initial position), resulting in wasted tools. Therefore, a disposable scalpel designed to prevent accidental locking was developed to address this problem.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0005] To overcome the shortcomings of the prior art, the purpose of this utility model is to provide a disposable surgical knife that prevents accidental locking.

[0006] To achieve the above and other related objectives, the technical solution provided by this utility model is: a disposable surgical knife with anti-locking feature, comprising a knife holder, a blade, and a protective sleeve, wherein one end of the knife holder is a connecting part and the other end is a hand-held part; the end of the blade away from its cutting edge is disposed on the connecting part, and the protective sleeve is fitted on the connecting part and can move back and forth along the direction of the blade;

[0007] It also includes a locking structure, which includes a locking member disposed on the protective sleeve and a locking groove disposed on the connecting part, wherein a locking block is disposed on the side wall of the locking groove;

[0008] The locking member is configured to correspond to the shape of the locking groove, and the locking member can be inserted into the locking groove by pressing and locked by the locking block;

[0009] The connecting part is provided with a sliding groove, and the protective sleeve is provided with an inwardly extending sliding protrusion. At least a portion of the sliding protrusion is accommodated in the sliding groove, and the sliding protrusion can slide along the sliding groove.

[0010] The sliding groove is provided with a first positioning groove, a second positioning groove and a third positioning groove in sequence along the same side; when the sliding protrusion is located in the first positioning groove and the locking member is pressed, the locking member is inserted into the locking groove; when the sliding protrusion is located in the second positioning groove and the locking member is pressed, the locking member abuts against the locking block.

[0011] In this design, before use, the protective sleeve is in its initial state, with the sliding protrusion located in the second positioning groove. At this time, the locking element is located outside the locking block. When the locking element is pressed, it is limited by the locking block and cannot enter the locking groove, thus preventing the scalpel from being rendered unusable due to accidental pressing of the locking element. During surgery, the sliding protrusion is moved to the third positioning groove. If the scalpel is paused during surgery or after the surgery, the sliding protrusion is moved to the second positioning groove. When it is confirmed that the scalpel is no longer needed, the sliding protrusion is moved to the first positioning groove, and the locking element is pressed down to insert into the locking groove, locking the protective sleeve and the connecting part. This also prevents accidental operation when the scalpel is paused during surgery. After locking, the protective sleeve is permanently fitted onto the blade, keeping the blade permanently locked and preventing the safety hazards caused by reusing a discarded scalpel.

[0012] Furthermore, when the sliding protrusion is located in the first positioning groove, the protective sleeve is fitted onto the blade; when the sliding protrusion is located in the second positioning groove, the protective sleeve is fitted onto the blade; when the sliding protrusion is located in the third positioning groove, the blade protrudes from the protective sleeve. In this design, the sliding protrusion being in the second positioning groove represents the initial state of the scalpel; the sliding protrusion being in the first positioning groove represents the unlocked state, and the protective sleeve on the blade provides protection, preventing accidental injury from the exposed blade; the sliding protrusion being in the third positioning groove represents the scalpel in use, with the blade exposed for convenient use.

[0013] Furthermore, the protective sleeve is provided with a first separation groove, which forms an elastic structure integrally connected to the sliding protrusion. One end of the elastic structure is integrally connected to the protective sleeve, while the other end is separated from the protective sleeve through the first separation groove. In this design, the second separation groove and the elastic structure allow the sliding protrusion to switch to different positioning slots within the motion groove.

[0014] Furthermore, the protective sleeve is provided with a second separation groove, which ensures that only one end of the locking member is connected to the protective sleeve, and the connecting part is provided with a locking groove at a corresponding position. In this solution, the second separation groove makes the locking member elastic, allowing it to tilt towards the locking groove when pressed and enter the locking groove.

[0015] Furthermore, the elastic structure is provided with an outwardly extending push block. In this design, by pressing the push block, the elastic structure can be tilted more easily towards the first separation groove, thereby improving the position switching efficiency of the sliding protrusion.

[0016] Furthermore, the first positioning groove, the second positioning groove, and the third positioning groove extend toward the push block and are all perpendicular to the motion slide; the first positioning groove and the second positioning groove are located at the same end of the motion slide, and the third positioning groove is located at the other end of the motion slide.

[0017] Furthermore, the inner surface of the protective sleeve is provided with an inwardly extending positioning slider, and a positioning groove is provided at a corresponding position of the connecting part, allowing the positioning slider to slide along the positioning groove. In this design, the positioning slider and positioning groove are used to position the relative positions of the protective sleeve and the connecting part, preventing the protective sleeve from wobbling as it slides along the connecting part, resulting in a more stable structure during sliding.

[0018] Furthermore, the locking member is provided with an upwardly protruding pressing part, and the pressing part is provided with an anti-slip structure. In this design, the pressing part facilitates pressing, and the anti-slip structure prevents hand slippage, making operation convenient.

[0019] Furthermore, two sets of motion grooves are provided, symmetrically arranged on the upper and lower surfaces of the connecting part. In this design, motion grooves are provided on both surfaces, making the movement of the protective sleeve more stable.

[0020] Furthermore, anti-slip strips are provided on both the upper and lower surfaces of the protective sleeve.

[0021] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0022] This invention relates to a disposable surgical knife designed to prevent accidental locking. Before use, when the protective cover is in its initial state, the locking block prevents the locking element from entering the locking groove. The operator needs to move the groove from its initial position to allow the locking element to be pressed down into the locking groove. This successfully avoids the situation where the surgical knife locks and becomes unusable before use due to accidental pressing of the locking element, thus reducing tool waste. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the scalpel of this utility model (in unused state);

[0024] Figure 2 This is a schematic diagram of the overall structure of the scalpel of this utility model (in use).

[0025] Figure 3 This is a schematic diagram of the overall structure of the protective sleeve of this utility model;

[0026] Figure 4 This is a schematic diagram of the cross-sectional structure of the protective sleeve of this utility model;

[0027] Figure 5 This is a schematic diagram of the tool holder and related structures of this utility model;

[0028] In the above figures, 1. Tool holder; 11. Handheld part; 12. Connecting part; 121. Movement groove; 122. First positioning groove; 123. Second positioning groove; 124. Locking groove; 125. Positioning groove; 126. Locking block; 127. Third positioning groove; 2. Protective sleeve; 21. First separation groove; 22. Elastic structure; 23. Sliding protrusion; 24. Push block; 25. Locking element; 251. Pressing part; 26. Second separation groove; 27. Positioning slider; 3. Blade. Detailed Implementation

[0029] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0030] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0033] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0034] Example:

[0035] See appendix Figure 1 and attached Figure 2 As shown, this embodiment provides a disposable surgical knife with anti-locking features, including a knife holder 1, a blade 3, and a protective sleeve 2. Anti-slip strips are provided on both the upper and lower surfaces of the protective sleeve 2. One end of the knife holder 1 is a connecting part 12, and the other end is a handheld part 11. The end of the blade 3 furthest from its cutting edge is disposed on the connecting part 12, and the protective sleeve 2 is fitted onto the connecting part 12 and can move back and forth along the direction of the blade 3.

[0036] It also includes a locking structure, which includes a locking member 25 disposed on the protective sleeve 2 and a locking groove 124 disposed on the connecting part 12. A locking block 126 is disposed on the side wall of the locking groove 124. The locking block 126 increases the clamping force of the locking groove 124 on the locking member 25. The locking member 25 is disposed in a shape corresponding to the locking groove 124. The locking member 25 can be inserted into the locking groove 124 by pressing and locked by the locking block 126.

[0037] See appendix Figure 3 Appendix Figure 4 and attached Figure 5As shown, the connecting part 12 is provided with a moving slide groove 121, and the protective sleeve 2 is provided with an inwardly extending sliding protrusion 23. At least a portion of the sliding protrusion 23 is accommodated within the moving slide groove 121, and the sliding protrusion 23 can slide along the moving slide groove 121. A first positioning groove 122, a second positioning groove 123, and a third positioning groove 127 are sequentially formed along the same side within the moving slide groove 121. When the sliding protrusion 23 is located within the first positioning groove 122 and the locking member 25 is pressed, the locking member 25 is inserted into the locking groove 124. When the sliding protrusion 23 is located within the second positioning groove 123 and the locking member 25 is pressed, the locking member 25 abuts against the locking block 126. Two sets of moving slide grooves 121 are provided, symmetrically arranged on the upper and lower surfaces of the connecting part 12. The presence of moving slide grooves 121 on both surfaces makes the movement of the protective sleeve more stable.

[0038] Before use, the protective sleeve 2 is in its initial state, with the sliding protrusion 23 located in the second positioning groove 123. At this time, the locking member 25 is located outside the locking block 126. When the locking member 25 is pressed, it is limited by the locking block 126 and cannot enter the locking groove 124, thus preventing the scalpel from being rendered unusable due to accidental pressing of the locking member 25. During surgery, the sliding protrusion 23 is moved to the third positioning groove 127. If the scalpel is paused during surgery or after surgery, the sliding protrusion 23 is moved to the second positioning groove 123. When it is confirmed that the scalpel is no longer needed, the sliding protrusion 23 is moved to the first positioning groove 122, and the locking member 25 is pressed down to insert into the locking groove 124, thus locking the protective sleeve 2 and the connecting part 12. This also prevents accidental operation when the scalpel is paused during surgery. After locking, the protective sleeve 2 is permanently fitted onto the blade 3, keeping the blade 3 permanently locked and avoiding the safety hazards caused by the reuse of the discarded scalpel.

[0039] When the sliding protrusion 23 is located in the first positioning groove 122, the protective sleeve 2 is fitted onto the blade 3; when the sliding protrusion 23 is located in the second positioning groove 123, the protective sleeve 2 is fitted onto the blade 3; when the sliding protrusion 23 is located in the third positioning groove 127, the blade 3 is exposed and fitted onto the protective sleeve 2. When the sliding protrusion 23 is located in the second positioning groove 123, it is in the initial state of the scalpel; when the sliding protrusion 23 is located in the first positioning groove 122, it is in an unlocked state, and the protective sleeve 2 fitted onto the blade 3 provides protection, preventing accidental injury caused by the blade 3 being exposed; when the sliding protrusion 23 is located in the third positioning groove 127, it is in the operating state of the scalpel, and the blade 3 is exposed for convenient use.

[0040] See appendix Figure 4As shown, the protective sleeve 2 is provided with a first separation groove 21. An elastic structure 22, integrally connected to the sliding protrusion 23, is formed on the protective sleeve 2 through the first separation groove 21. One end of the elastic structure 22 is integrally connected to the protective sleeve 2, and the other end is separated from the protective sleeve 2 through the first separation groove 21. Through the provision of the second separation groove 26 and the elastic structure 22, the sliding protrusion 23 can be switched to different positioning slots within the motion slide groove 121. The protective sleeve 2 is provided with a second separation groove 26, which ensures that only one end of the locking member 25 is connected to the protective sleeve 2. The connecting part 12 is provided with a locking groove 124 at a corresponding position. Through the provision of the second separation groove 26, the locking member 25 itself is elastic, allowing it to tilt towards the locking groove 124 when pressed, thus allowing the locking member 25 to enter the locking groove 124.

[0041] The shape of the second separation groove can be, but is not limited to, C-shaped or U-shaped, as long as it allows only one end of the locking member 25 to connect with the protective sleeve 2. Since the left, right, and front ends of the locking member 25 form the second separation groove 26, the locking member 25 is separated from the protective sleeve 2, ensuring that only one end of the locking member 25 connects to the protective sleeve 2. Furthermore, the locking member 25 is elastic; when pressed, it tilts towards the connecting part 12. The connecting part 12 has a locking groove 124 at a corresponding position. When the locking member 25 is pressed downwards, it moves downwards and can be inserted into the locking groove 124. After the locking member 25 tilts towards the connecting part 12 and is inserted into the locking groove 124, the side wall of the locking groove 124 clamps the locking member 25, keeping it within the locking groove 124 and thus maintaining a relatively stationary state between the protective sleeve 2 and the connecting part 12.

[0042] See appendix Figure 4 As shown, the elastic structure 22 is provided with a push block 24 extending outward. In this embodiment, by pressing the push block 24, the elastic structure 22 can be tilted towards the first separation groove 21 more easily, thereby improving the position switching efficiency of the sliding protrusion 23.

[0043] See appendix Figure 5 As shown, the first positioning groove 122, the second positioning groove 123 and the third positioning groove 127 extend toward the push block 24 and are all perpendicular to the motion slide 121; the first positioning groove 122 and the second positioning groove 123 are located at the same end of the motion slide 121, and the third positioning groove 127 is located at the other end of the motion slide 121.

[0044] See appendix Figure 4 and attached Figure 5As shown, the inner side of the protective sleeve 2 is provided with an inwardly extending positioning slider 27, and the connecting part 12 is provided with a positioning groove 125 at a corresponding position, allowing the positioning slider 27 to slide along the positioning groove 125. The positioning slider 27 and the positioning groove 125 are used to position the relative positions of the protective sleeve 2 and the connecting part 12, preventing the protective sleeve 2 from wobbling during sliding along the connecting part 12, thus making the structure more stable during sliding.

[0045] See appendix Figure 3 As shown, the locking member 25 is provided with an upwardly protruding pressing part 251, and the pressing part 251 is provided with an anti-slip structure. The pressing part 251 is designed to facilitate pressing, and the anti-slip structure can prevent the hand from slipping, making operation convenient.

[0046] Operating principle:

[0047] Before using the scalpel, the protective sleeve 2 is placed on the blade 3. The protective sleeve 2 is in its initial state, and the sliding protrusion 23 is located in the second positioning groove 123. At this time, the locking member 25 is located outside the locking block 126. When the locking member 25 is pressed, it is limited by the locking block 126 and cannot enter the locking groove 124. This avoids the scalpel being scrapped due to locking before use because of accidental pressing of the locking member 25.

[0048] During surgery, by pressing the push block 24, the elastic structure 22 is deformed and tilted towards the first separation groove 21. At this time, the sliding protrusion 23 slides into the moving groove 121. Then, the push block 24 is pushed to make the sliding protrusion 23 slide along the moving groove 121, that is, the protective sleeve 2 slides along the connecting part 12. During the sliding process, the blade 3 is exposed from the protective sleeve 2. When the sliding protrusion 23 slides to the vicinity of the third positioning groove 127, the elastic structure 22, due to its own elasticity, drives the sliding protrusion 23 to slide into the third positioning groove 127. At this time, the blade 3 is fully exposed, and the scalpel can be used to perform surgery.

[0049] After the surgery, slide the protective sleeve 2 in the opposite direction to cover the blade 3, thus protecting the blade 3. After moving the sliding protrusion 23 into the second positioning groove 123, move the sliding protrusion 23 further into the first positioning groove 122, and then press down on the locking member 25 to move it downward and insert it into the locking groove 124. The side wall of the locking groove 124 clamps the locking member 25, keeping it within the locking groove 124, thereby keeping the protective sleeve 2 and the connecting part 12 relatively stationary, i.e., the protective sleeve 2 and the connecting part 12 are locked.

[0050] This invention relates to a disposable surgical knife designed to prevent accidental locking. Before use, when the protective sleeve 2 is in its initial state, the locking block 126 limits the locking element 25 from entering the locking groove 124. The operator needs to move the groove from its initial position to allow the locking element 25 to be pressed down into the locking groove 124. This successfully avoids the situation where the surgical knife is locked and rendered unusable before use due to accidental pressing of the locking element 25, thus reducing tool waste.

[0051] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A disposable surgical knife with an anti-mislocking function, comprising a knife holder (1), a blade (3) and a protective sleeve (2), one end of the knife holder (1) being a connecting portion (12) and the other end being a hand holding portion (11); one end of the blade (3) away from the blade edge is arranged on the connecting portion (12), and the protective sleeve (2) is arranged on the connecting portion (12) and can move back and forth along the direction of the blade (3); characterized in that: further comprising a locking structure, the locking structure comprising a locking piece (25) arranged on the protective sleeve (2) and a locking groove (124) arranged on the connecting portion (12), and a locking block (126) is arranged on the side wall of the locking groove (124); the locking piece (25) is arranged in correspondence with the shape of the locking groove (124), and the locking piece (25) can be inserted into the locking groove (124) by pressing and locked by the locking block (126); a movement sliding groove (121) is arranged on the connecting portion (12), and a sliding protrusion (23) extending inwardly is arranged on the protective sleeve (2), at least a part of the sliding protrusion (23) is accommodated in the movement sliding groove (121), and the sliding protrusion (23) can slide along the movement sliding groove (121); the movement sliding groove (121) is sequentially provided with a first positioning groove (122), a second positioning groove (123) and a third positioning groove (127) along the same side; when the sliding protrusion (23) is located in the first positioning groove (122) and the locking piece (25) is pressed, the locking piece (25) is arranged in the locking groove (124); when the sliding protrusion (23) is located in the second positioning groove (123) and the locking piece (25) is pressed, the locking piece (25) is arranged against the locking block (126).

2. The disposable surgical knife with an anti-mislocking function according to claim 1, characterized in that: when the sliding protrusion (23) is located in the first positioning groove (122), the protective sleeve (2) is arranged on the blade (3); when the sliding protrusion (23) is located in the second positioning groove (123), the protective sleeve (2) is arranged on the blade (3); when the sliding protrusion (23) is located in the third positioning groove (127), the blade (3) is arranged exposed from the protective sleeve (2); a first separation groove (21) is arranged on the protective sleeve (2), and an elastic structure (22) integrally connected with the sliding protrusion (23) is formed on the protective sleeve (2) by arranging the first separation groove (21), one end of the elastic structure (22) is integrally connected with the protective sleeve (2), and the other end is arranged separately from the protective sleeve (2) through the first separation groove (21); 3. The mistake-proof disposable scalpel of claim 1, wherein: a second separation groove (26) is arranged on the protective sleeve (2), the second separation groove (26) makes the locking piece (25) connected with the protective sleeve (2) only at one end, and the connecting portion (12) is provided with the locking groove (124) at the corresponding position.

4. The mistake-proof disposable scalpel of claim 1, wherein: ​ 5. The mistake-proof disposable scalpel of claim 3, wherein: The elastic structure (22) is provided with a push block (24) extending to the outside.

6. The mistake-proof, single-use scalpel of claim 5, wherein: The first positioning slot (122), the second positioning slot (123) and the third positioning slot (127) extend to the direction of the push block (24) and are perpendicular to the movement sliding groove (121); the first positioning slot (122) and the second positioning slot (123) are located at the same end of the movement sliding groove (121), and the third positioning slot (127) is located at the other end of the movement sliding groove (121).

7. The mistake-proof disposable scalpel of claim 1, wherein: The inner side of the protective sleeve (2) is provided with a positioning sliding block (27) extending to the inside, and the connecting part (12) is provided with a positioning sliding groove (125) at the matched position, and the positioning sliding block (27) can slide along the positioning sliding groove (125).

8. The mistake-proof disposable scalpel of claim 1, wherein: The locking part (25) is provided with a pressing part (251) protruding upward, and the pressing part (251) is provided with an anti-skid structure.

9. The mistake-proof disposable scalpel of claim 1, wherein: The movement sliding groove (121) is provided with two groups and is symmetrically arranged on the upper surface and the lower surface of the connecting part (12).

10. The mistake-proof disposable scalpel of claim 1, wherein: The upper surface and the lower surface of the protective sleeve (2) are provided with anti-skid strips.

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