Disposable blade assembly of safe scalpel

Abstract

The utility model discloses a disposable blade assembly of a safety scalpel. The disposable blade assembly is provided with a blade, a blade seat and a blade protection sleeve. The blade seat is connected with a first elastic arm, and a first protruding point is arranged on the first elastic arm in a protruding mode. A first limiting part corresponding to the first convex point is arranged on the blade protection sleeve, and first locking is formed by limiting the first convex point through the first limiting part; the blade protection sleeve is connected with a second elastic arm, and a second convex point is convexly arranged on the blade protection sleeve towards the blade seat; a second limiting part corresponding to the second convex point is arranged on the blade seat, and second locking is formed by limiting the second convex point through the second limiting part; the second elastic arm is positioned above the first elastic arm; during unlocking, the second elastic arm is pressed to deform, and meanwhile, the first elastic arm is acted to deform together; and when the two elastic arms deform, the first locking and the second locking are released. During use, unlocking at two positions can be achieved through one-time pressing, after use, the knife handle can be prevented from being inserted into the blade base again to be combined with the blade base, and the risk of repeated use is avoided.

Description

Technical Field

[0001] This utility model relates to medical surgical scalpels, specifically to a disposable blade assembly for a safety surgical scalpel. Background Technology

[0002] Scalpels are essential tools for performing surgical procedures, and their safety is crucial for both the surgeon and the patient. Traditional scalpels typically consist of a metal handle and a disposable blade attached to the handle before use and removed afterward. The attachment and removal of the blade is a difficult and dangerous process, posing a potential risk of injury to the user from the exposed blade or contamination from blood on it. Furthermore, sharps injuries are easily caused when a surgeon passes an exposed scalpel to a colleague.

[0003] To improve safety, Chinese patent CN102835992B discloses a "Disposable Surgical Blade Assembly and Matching Non-Disposable Handle," which was applied for by the applicant in 2012. On one hand, this patent eliminates the possibility of reusing the combination of the blade assembly and handle in the scalpel, achieving the safety objective that the blade assembly can only be used once. On the other hand, in the locked state, the blade holder and the blade relative to the blade protective sleeve in the blade assembly are permanently locked, losing their original function, thus completely eliminating the safety issue of reusing the scalpel after use.

[0004] The aforementioned existing technology avoids the reuse of the blade assembly and solves the safety problem after the scalpel is used, but it still has the following defects: after use, if the operator forcibly inserts the handle into the blade holder of the blade assembly, the second locking protrusion of the unlock button on the top surface of the blade protector may be damaged, causing the blade to extend out of the blade protector, thus rendering the protection function ineffective, and improper operation may result in puncture wounds or other risks.

[0005] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Summary of the Invention

[0006] The purpose of this invention is to provide a disposable blade assembly for a safe surgical scalpel.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A disposable blade assembly for a safety scalpel, the blade assembly having a blade, a blade holder, and a blade protective sleeve, the blade being fixed to the front of the blade holder, and the blade protective sleeve being slidably fitted onto the blade holder in a front-to-back direction; the blade assembly is assembled and connected to the front of a scalpel handle via the rear of the blade holder.

[0009] A first elastic arm is connected to the blade holder, and a first protrusion is provided on the first elastic arm; a first limiting part is provided on the blade protective sleeve corresponding to the first protrusion, and the first limiting part limits the first protrusion to form a first lock;

[0010] A second elastic arm is connected to the blade protective sleeve, and a second protrusion is provided on the second elastic arm facing the blade holder; a second limiting part is provided on the blade holder corresponding to the second protrusion, and the second limiting part limits the second protrusion to form a second lock;

[0011] The second elastic arm is located above the first elastic arm; when unlocking, the second elastic arm is pressed down to deform it, and at the same time the second elastic arm acts on the first elastic arm to deform it together; when the two elastic arms are deformed, the first protrusion and the second protrusion are respectively offset from their corresponding limiting parts, thereby simultaneously releasing the first lock and the second lock.

[0012] In the above scheme, the blade assembly is defined to have an initial state, a usage state, and a usage-completed state;

[0013] In both the initial state and the used-out state, the blade and the blade holder are positioned within the blade protective sleeve.

[0014] Before use, insert the handle into the rear end of the blade holder and push the blade holder forward within the blade protector until the blade extends beyond the front of the protector. In the usage state, the blade remains extended beyond the protector.

[0015] In the used-out state, the handle is separated from the blade assembly, and the blade holder and blade protective sleeve in the blade assembly are locked.

[0016] In a further technical solution, the first limiting part is a blocking plane. In the initial assembly state of the blade assembly, the blocking plane abuts against the first protrusion in the sliding direction to form the first lock in the initial state.

[0017] The second limiting part is a locking groove; in the initial state, the second protrusion and the locking groove abut against each other in the sliding direction to limit the movement, forming the second lock in the initial state.

[0018] A further technical solution is that a first positioning hole is formed on the blade protective sleeve, and the first positioning hole is formed at the position of the first protrusion when the blade extends out of the blade protective sleeve;

[0019] In use, the first protrusion extends into the first positioning hole, and the first protrusion is held in the first positioning hole by the elasticity of the first elastic arm, thereby locking the use state.

[0020] A further technical solution includes a locking groove in front of the locking groove, and a locking block between the locking groove and the locking groove; in use, the second protrusion cooperates with the locking groove and the locking groove to form the following different states:

[0021] a. When the second protrusion is located in the locking groove, the blade is stored in the blade protective sleeve, and the blade holder and the blade are locked relative to the blade protective sleeve;

[0022] b. When the second elastic arm is pressed, the second protrusion on the second elastic arm moves downward and away from the locking groove, allowing the blade protector to slide relative to the blade holder and the blade in this state;

[0023] c. When the second protrusion passes over the locking block from the locking groove and falls into the locking groove, the second elastic arm cannot be pressed again, the blade is stored in the blade protective sleeve, and the blade seat and the blade relative to the blade protective sleeve enter the locked state.

[0024] In a further technical solution, the side of the locking block near the locking groove is an inclined surface, and the side of the locking block near the locking groove is a vertical surface.

[0025] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0026] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0027] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0028] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0029] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0030] The working principle and advantages of this utility model are as follows:

[0031] 1. Pressing the second elastic arm on the top of the blade protector with your finger unlocks both points simultaneously. The first protrusion on the first elastic arm and the second protrusion on the second elastic arm unlock simultaneously, allowing the blade holder and handle to slide back and forth relative to the blade protector, meeting usage requirements. After use, even if the operator forcibly inserts the handle into the blade holder of the blade assembly, damaging the second protrusion on the second elastic arm of the blade protector, the first protrusion on the first elastic arm of the blade holder can still enter the first limiting part of the blade protector, providing a limiting protection function and reducing the risk of puncture wounds due to improper operation.

[0032] Second, even if the blade holder is not pushed into the blade protective sleeve before use, resulting in the first protrusion of the first elastic arm on the blade holder not being positioned in the first limiting part of the blade protective sleeve, during use, when the knife handle is inserted into the blade protective sleeve, it will push the blade holder to move. The first protrusion of the first elastic arm on the blade holder will be positioned in the second limiting part of the blade protective sleeve, realizing the connection between the knife handle and the blade holder, and preventing the knife handle from pushing the blade holder with the blade out of the blade protective sleeve and falling off.

[0033] Third, by locking the first protrusion into the first positioning hole of the blade protective sleeve, this utility model also serves to prevent the blade holder from separating from the handle. During the use of the knife, there will be a pulling action, which can prevent the blade holder from being pulled out due to force and separating from the handle. Attached Figure Description

[0034] Appendix Figure 1 This is a schematic diagram of the structure of the surgical knife in an embodiment of the present invention;

[0035] Appendix Figure 2 This is an exploded view of the surgical scalpel according to an embodiment of the present invention;

[0036] Appendix Figure 3 This is a cross-sectional schematic diagram of the blade assembly according to an embodiment of the present utility model;

[0037] Appendix Figure 4 This is a schematic diagram of the structure of the combination of the blade and the blade holder according to an embodiment of the present invention;

[0038] Appendix Figure 5 This is a cross-sectional schematic diagram of the blade protective sleeve according to an embodiment of the present utility model;

[0039] Appendix Figure 6 This is a schematic diagram of the blade holder in an embodiment of the present utility model (rear view).

[0040] Appendix Figure 7 This is a schematic diagram of the blade protective sleeve in an embodiment of the present utility model (rear view).

[0041] Appendix Figure 8 This is a schematic diagram showing the initial state of an embodiment of the present invention;

[0042] Appendix Figure 9 for Figure 8 Enlarged view of point A in the middle;

[0043] Appendix Figure 10 A schematic diagram illustrating the preparation of use for an embodiment of this utility model;

[0044] Appendix Figure 11 for Figure 10 Enlarged view of point B in the middle;

[0045] Appendix Figure 12 This is a schematic diagram showing the usage state of an embodiment of this utility model;

[0046] Appendix Figure 13 This is a schematic diagram showing the usage state of an embodiment of this utility model;

[0047] Appendix Figure 14 This is a schematic diagram of the knife handle and blade assembly after separation in an embodiment of this utility model.

[0048] In the attached diagrams above:

[0049] 1. Blade holder; 11. First elastic arm; 111. First protrusion; 12. Locking groove; 13. Third elastic arm; 131. Third protrusion; 14. Fourth elastic arm; 141. Locking block; 142. Extending block; 15. Locking groove; 16. Locking block;

[0050] 2. Blade;

[0051] 3. Blade protective sleeve; 31. Blocking plane; 32. Second elastic arm; 321. Second protrusion; 322. Limiting stop surface; 33. Second positioning hole; 34. First positioning hole; 35. Reserved hole;

[0052] 4. Knife handle; 5. Fingers. Detailed Implementation

[0053] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0054] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0055] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0056] See appendix Figures 1-14As shown, a blade assembly for a safety scalpel includes a blade 2, a blade holder 1, and a blade protective sleeve 3. The blade 2 is fixed to the front of the blade holder 1, and the blade protective sleeve 3 is slidably fitted onto the blade holder 1 in the front-back direction. The blade assembly is connected to the front of a handle 4 via the rear of the blade holder 1.

[0057] A first elastic arm 11 is connected to the upper rear part of the blade holder 1. The front end of the first elastic arm 11 is suspended in the air, and the rear end is connected to the body of the blade holder 1. A first protrusion 111 is provided on the front end of the first elastic arm 11.

[0058] The blade protective sleeve 3 is provided with a blocking plane 31 corresponding to the first protrusion 111. In the initial assembly state of the blade assembly, the blocking plane 31 abuts against the front of the first protrusion 111 in the sliding direction, thus forming a first lock on the initial state.

[0059] A second elastic arm 32 is connected to the upper rear part of the blade protective sleeve 3 as an unlocking button. The front end of the second elastic arm 32 is suspended, and the rear end is connected to the body of the blade protective sleeve 3. A second protrusion 321 is provided on the second elastic arm 32 facing the blade seat 1. A locking groove 12 is provided on the blade seat 1 corresponding to the second protrusion 321. In the initial state, the second protrusion 321 and the locking groove 12 abut against each other in the sliding direction to limit the movement, thus forming a second lock for the initial state.

[0060] like Figures 8-11 As shown, in the initial state, the second elastic arm 32 is located above the first elastic arm 11; when unlocking, the second elastic arm 32 is pressed down to deform it, and at the same time the second elastic arm 32 acts on the first elastic arm 11 to deform it together.

[0061] When the first elastic arm 11 deforms, the first protrusion 111 is misaligned with the blocking plane 31, thereby making way and releasing the first lock; when the second elastic arm 32 deforms, the second protrusion 321 is misaligned with the locking groove 12, thereby making way and releasing the second lock.

[0062] Preferably, the first limiting part is a blocking plane 31. In the initial assembly state of the blade assembly, the blocking plane 31 abuts against the first protrusion 111 in the sliding direction to form the first lock in the initial state.

[0063] The second limiting part is a locking groove 12; in the initial state, the second protrusion 321 and the locking groove 12 abut against each other in the sliding direction to limit the movement, forming the second lock in the initial state.

[0064] Preferably, the blade protective sleeve 3 has a first positioning hole 34, which is provided at the position of the first protrusion 111 when the blade 2 extends out of the blade protective sleeve 3.

[0065] like Figure 7 , Figure 12 As shown, in the use state, the first protrusion 111 extends into the first positioning hole 34, and the first protrusion 111 is held in the first positioning hole 34 by the elasticity of the first elastic arm 11, thereby forming a lock for the use state.

[0066] Preferably, the blade protector 3 has a second positioning hole 33. The blade holder 1 is connected to a third elastic arm 13, and the third elastic arm 13 has a third protrusion 131 protruding towards the blade protector 3. In the initial state, the third protrusion 131 extends into the second positioning hole 33 to achieve locking.

[0067] Specifically, the second positioning hole 33 is a strip-shaped hole; in the initial assembly state of the blade assembly, the third protrusion 131 extends into the front end of the second positioning hole 33 to achieve locking; after use and removal of the blade handle 4, the third protrusion 131 slides to the rear end of the second positioning hole 33 and is limited. With this design, on the one hand, if the second elastic arm 32 fails to limit the movement due to accidental contact during the insertion of the blade handle 4, the third protrusion 131 of the third elastic arm 13 can still play a limiting role; on the other hand, even if the second protrusion 321 on the blade protective sleeve 3 fails due to factors such as violent operation, the third protrusion 131 can prevent the blade holder 1 from being pulled out during the removal of the blade handle 4 by limiting the movement at the rear end of the second positioning hole 33.

[0068] Preferably, the rear of the blade holder 1 is provided with a fourth elastic arm 14 that extends rearward and is used to connect the blade handle 4. The end of the fourth elastic arm 14 is provided with a locking block 141 for engaging with the front of the blade handle 4 and an extension block 142 for preventing the fourth elastic arm 14 from bending and deforming. The extension block 142 extends toward the inner wall of the blade protective sleeve 3, and a pre-drilled hole 35 is provided on the inner wall of the blade protective sleeve 3 corresponding to the extension block 142.

[0069] In the initial state of the blade assembly, the protruding block 142 faces the pre-drilled hole 35. When the blade handle 4 is inserted into the blade assembly and connected to the blade holder 1, the front end of the blade handle 4 acts on the locking block 141, forcing the fourth elastic arm 14 to bend and deform, and simultaneously forcing the protruding block 142 to extend into the pre-drilled hole 35 for lateral clearance. After the front end of the blade handle 4 passes the locking block 141, the fourth elastic arm 14 automatically resets due to elasticity. At this time, the front end of the blade handle 4 engages with the locking block 141, connecting the blade handle 4 to the blade holder 1. When the blade handle 4 is pulled out, the front end of the blade handle 4 drives the blade holder 1 to move backward relative to the blade protective sleeve 3 through the locking block 141, forcing the protruding block 142 to be misaligned with the pre-drilled hole 35. In this state, because the protruding block 142 cannot make lateral clearance through the pre-drilled hole 35, the blade handle 4 cannot be inserted into the blade assembly and connected to the blade holder 1 again.

[0070] Preferably, a locking groove 15 is provided in front of the locking groove 12, and a locking block 16 is provided between the locking groove 15 and the locking groove 12; in use, the second protrusion 321 cooperates with the locking groove 12 and the locking groove 15 to form the following different states:

[0071] a. When the second protrusion 321 is located in the locking groove 12, the blade 2 is stored in the blade protective sleeve 3, and the blade holder 1 and the blade 2 are locked relative to the blade protective sleeve 3;

[0072] b. When the second elastic arm 32 is pressed, the second protrusion 321 on the second elastic arm 32 moves downward and away from the locking groove 12. At the same time, the second elastic arm 32 forces the first elastic arm 11 to deform downward, and the first protrusion 111 moves downward and offsets the blocking plane 31. In this state, the blade protective sleeve 3 is allowed to slide relative to the blade seat 1 and the blade 2.

[0073] c. When the second protrusion 321 passes over the locking block 16 from the locking groove 12 and falls into the locking groove 15, the blade 2 is stored in the blade protective sleeve 3, and the blade seat 1 and the blade 2 enter a locked state relative to the blade protective sleeve 3. At this time, since the second protrusion 321 is located in the locking groove 15, the second elastic arm 32 cannot be deformed again by pressing.

[0074] Preferably, the side of the locking block 16 near the locking groove 12 is an inclined surface, and the side of the locking block 16 near the locking groove 15 is a vertical surface.

[0075] Preferred, such as Figure 9 As shown, the second elastic arm 32 is also provided with a limiting stop 322 corresponding to the first elastic arm 11. After the knife handle 4 is removed, the first elastic arm 11 is limited by the limiting stop 322. This design further prevents the blade holder 1 from being pulled out during the removal of the knife handle 4, and cooperates with the limiting of the third protrusion 131 by the rear end of the second positioning hole 33 to form a double safety.

[0076] The blade assembly is defined to have an initial state, a usage state, and a used state. In both the initial and used states, the blade 2 and the blade holder 1 are positioned within the blade protective sleeve 3. Before use, the handle 4 is inserted into the rear end of the blade holder 1, and the blade holder 1 is pushed forward within the blade protective sleeve 3 until the blade 2 extends beyond the front of the blade protective sleeve 3. In the usage state, the blade 2 remains extended beyond the blade protective sleeve 3.

[0077] The specific connection method between the handle 4 and the blade holder 1 can adopt the scheme disclosed in the prior art. Since it is not the point of invention in this case, it will not be described in detail here.

[0078] The functions achievable by the double elastic arms of blade holder 1 are described below:

[0079] I. Locking Function

[0080] The first protrusion 111 of the first elastic arm 11 cooperates with the blocking plane 31 of the blade protective sleeve 3, so that the blade holder 1 cannot move forward.

[0081] During implementation: Finger 5 presses the second elastic arm 32 of the blade protector 3. As the second elastic arm 32 moves downwards, it presses the first protrusion 111, causing the first elastic arm 111 to rotate counter-clockwise. When the first protrusion 111 passes the blocking plane 31, unlocking is complete. Simultaneously, when finger 5 presses the second elastic arm 32, it causes the second protrusion 321 to rotate counter-clockwise. When it disengages from the locking groove 12 of the blade holder 1, unlocking is complete. After both unlocking points are completed simultaneously, the handle 4 and the blade holder 1 can slide back and forth within the blade protector 3, enabling its use.

[0082] II. Function to prevent the blade holder 1 and the tool shank 4 from separating.

[0083] The first protrusion 111 is inserted into the first positioning hole 34 of the blade protective sleeve 3. During the use of the blade, there will be a pulling action, which can prevent the blade holder 1 from being pulled out due to force and separating from the blade handle 4.

[0084] During implementation: When the blade protector 2 slides backward on the blade holder 1 and the handle 4, the first protrusion 111 engages with the first positioning hole 34, and the blade 2 extends out of the front of the blade protector 3. At this time, the scalpel can be used normally.

[0085] 3. When installing the tool holder 4, it serves as a positioning element, making it easy for the tool holder 4 to be inserted into the blade protector 3 and the blade holder 1.

[0086] When the handle 4 is forcefully inserted into the blade holder 1 and the blade protective sleeve 3, the first protrusion 111 and the blocking plane 31 cooperate, and the blade holder 1 cannot move forward, thus facilitating the insertion of the handle 4.

[0087] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A disposable blade assembly for a safety scalpel, the blade assembly having a blade (2), a blade holder (1), and a blade protective sleeve (3), the blade (2) being fixed to the front of the blade holder (1), and the blade protective sleeve (3) being slidably fitted onto the blade holder (1) in a front-back direction; the blade assembly being connected to the front of a scalpel handle (4) via the rear of the blade holder (1); characterized in that: A first elastic arm (11) is connected to the blade holder (1), and a first protrusion (111) is protruding on the first elastic arm (11); a first limiting part is provided on the blade protective sleeve (3) corresponding to the first protrusion (111), and the first limiting part limits the first protrusion (111) to form a first lock; A second elastic arm (32) is connected to the blade protective sleeve (3), and a second protrusion (321) is provided on the second elastic arm (32) facing the blade holder (1); a second limiting part is provided on the blade holder (1) corresponding to the second protrusion (321), and a second lock is formed by limiting the second protrusion (321) through the second limiting part; The second elastic arm (32) is located above the first elastic arm (11); when unlocking, the second elastic arm (32) is pressed down to deform it, and at the same time the second elastic arm (32) acts on the first elastic arm (11) to deform it together; when the two elastic arms are deformed, the first protrusion (111) and the second protrusion (321) are respectively offset from their respective limiting parts, thereby simultaneously releasing the first lock and the second lock.

2. The disposable blade assembly of a safety scalpel according to claim 1, characterized in that: The first limiting part is a blocking plane (31). In the initial assembly state of the blade assembly, the blocking plane (31) abuts against the first protrusion (111) in the sliding direction to form the first lock in the initial state. The second limiting part is a locking groove (12); in the initial state, the second protrusion (321) and the locking groove (12) abut against each other in the sliding direction to limit the movement, forming the second lock in the initial state.

3. The disposable blade assembly of a safety scalpel according to claim 1, characterized in that: The blade protective sleeve (3) has a first positioning hole (34) which is opened at the position of the first protrusion (111) when the blade (2) extends out of the blade protective sleeve (3); In use, the first protrusion (111) extends into the first positioning hole (34), and the first protrusion (111) is held in the first positioning hole (34) by the elasticity of the first elastic arm (11), thereby forming a lock for use.

4. The disposable blade assembly of a safety scalpel according to claim 2, characterized in that: A locking groove (15) is provided in front of the locking groove (12), and a locking block (16) is provided between the locking groove (15) and the locking groove (12); in use, the second protrusion (321) cooperates with the locking groove (12) and the locking groove (15) to form the following different states: a. When the second protrusion (321) is located in the locking groove (12), the blade (2) is stored in the blade protective sleeve (3), and the blade holder (1) and the blade (2) are locked relative to the blade protective sleeve (3); b. When the second elastic arm (32) is pressed, the second protrusion (321) on the second elastic arm (32) moves downward and away from the locking groove (12), allowing the blade protector (3) to slide relative to the blade holder (1) and the blade (2) in this state; c. When the second protrusion (321) passes over the locking block (16) from the locking groove (12) and falls into the locking groove (15), the second elastic arm (32) cannot be pressed again, the blade (2) is stored in the blade protective sleeve (3), and the blade seat (1) and the blade (2) enter the locked state relative to the blade protective sleeve (3).

5. The disposable blade assembly of a safety scalpel according to claim 4, characterized in that: The locking block (16) has an inclined surface on the side near the locking groove (12) and a vertical surface on the side near the locking groove (15).

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