A scalpel

Abstract

The invention relates to a scalpel, comprising a blade body and a blade sheath, wherein the blade sheath is slidably sleeved on the blade body, the blade body comprises a blade and a blade handle, the blade sheath has an opening for the blade to pass through, the blade sheath is further provided with a locking sleeve, the locking sleeve is slidably sleeved on the blade handle, a first clamping block is provided on the inner wall of the locking sleeve, a gap is left between the locking sleeve and the blade handle, the gap is located on a side of the locking sleeve away from the first clamping block, a first clamping groove and a second clamping groove are provided on the blade handle, the first clamping block respectively cooperates with the first clamping groove, the blade handle and the second clamping groove to form different states: when the first clamping block is located in the first clamping groove, the blade is accommodated in the blade sheath, and the blade and the blade handle are in a locked state relative to the blade sheath; when the locking sleeve is pressed along the width direction of the blade handle and is caused to slide along the blade handle, the first clamping block is disengaged from the first clamping groove and slides along the blade handle to the second clamping groove, and the blade passes through the blade sheath through the opening; when the first clamping block is located in the second clamping groove, the blade is exposed outside the blade sheath, and the blade and the blade handle are in a locked state relative to the blade sheath.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, in particular to a scalpel. Background Art

[0002] Scalpels are essential tools for surgical procedures. Currently, scalpels are primarily available in two types: fixed and retractable. Fixed scalpels have a handle and blade fixed together, protected by a separate sheath or a removable shield attached to the handle. Because the sheath and shield can be separated from the scalpel, they can easily fall or be lost, leaving the exposed blade dangerous and susceptible to contamination. Retractable scalpels, on the other hand, have a separate handle and blade connected by a spring or other elastic element. The blade retracts upon removal of external force. For example, a safety scalpel disclosed in CN 102871706 A features a top unlock button on the blade shield that can be pushed after use, causing a first protrusion on the shield to fall into a locking groove, locking the blade. Upon application of external force, the blade extends. CN 202654191 U discloses a scalpel having buttons and corresponding plastic springs on both sides of a scalpel sheath. During use, the button is pressed to press against a locking tongue on the plastic spring, which moves out of a slot. The scalpel sheath is then pulled to slide onto the handle, exposing the blade. After use, the sheath is pulled again to slide onto the blade. While retractable scalpels avoid the shortcomings of fixed scalpels, they are more complex in structure and more expensive. If elastic elements such as springs are damaged, the scalpel cannot be used. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a scalpel with a simple structure. During use, the knife sheath is always mounted on the scalpel, and there is no need to use a spring to connect the knife sheath and the handle, which is easy to use.

[0004] A scalpel of the present invention comprises a blade body and a blade sheath, wherein the blade sheath is slidably mounted on the blade body, the blade body comprising a blade and a handle, the blade sheath having an opening for the blade to pass through, the blade sheath further being provided with a locking sleeve, the locking sleeve being slidably mounted on the handle, a first clamping block being provided on an inner wall of the locking sleeve, a gap being left between the locking sleeve and the handle, the gap being located on a side of the locking sleeve away from the first clamping block, a first clamping slot and a second clamping slot being provided on the handle, the first clamping block being respectively engaged with the first clamping slot, the handle, and the second clamping slot to form the following different states:

[0005] When the first clamping block is located in the first clamping slot, the blade is accommodated in the knife sleeve and the blade and the knife handle are in a locked state relative to the knife sleeve;

[0006] When the locking sleeve is pressed along the width direction of the knife handle and the locking sleeve is slid along the knife handle, the first clamping block is disengaged from the first clamping groove and slides along the knife handle to the second clamping groove, and the blade passes through the knife sleeve through the opening;

[0007] When the first clamping block is located in the second clamping groove, the blade is exposed outside the knife sleeve and the blade and the knife handle are in a locked state relative to the knife sleeve.

[0008] Furthermore, the locking sleeve is connected to the knife sheath via a connecting portion. The knife sheath is provided with a first hollow portion and a second hollow portion. The first hollow portion and the second hollow portion are located on either side of the connecting portion along the width of the knife handle. When the locking sleeve is pressed along the width of the knife handle, the connecting portion undergoes elastic deformation. Preferably, the connecting portion is made of an elastomer or plastic.

[0009] Furthermore, the knife handle is provided with a first strip groove and a second strip groove arranged along its length direction, and the inner wall of the knife sleeve is provided with a first strip protrusion and a second strip protrusion. The first strip protrusion slides along the first strip groove, and the second strip protrusion slides along the second strip groove.

[0010] Furthermore, the knife handle is provided with a second clamping block, and the knife sheath is provided with a third hollow portion and a slide groove located on one side of the third hollow portion and extending along the length direction of the knife sheath. The second clamping block cooperates with the third hollow portion and the slide groove to form the following different states:

[0011] When the first card block is located in the first card slot, the second card block is located in the third hollow portion;

[0012] When the locking sleeve is pressed along the width direction of the knife handle and is made to slide along the knife handle, the second clamping block is separated from the third hollow portion and slides along the sliding groove.

[0013] Furthermore, the second clamping block has an inclined surface, which is inclined in a direction from approaching to moving away from the tool handle.

[0014] Furthermore, anti-slip stripes are provided on the outer wall of the knife sheath.

[0015] Furthermore, the handle is provided with a scale.

[0016] Furthermore, the scale is located at an end away from the blade.

[0017] Furthermore, the blade is detachably connected to the handle.

[0018] Furthermore, the knife sheath is transparent

[0019] Furthermore, the knife sheath is made of an elastomer material.

[0020] By means of the above solution, the present invention has at least the following advantages:

[0021] The present invention utilizes a slidable sheath mounted on the scalpel body and an opening provided in the sheath, thereby ensuring that the sheath remains mounted on the scalpel during use without the need to separate the sheath from the scalpel body. This prevents the sheath from being lost, ensures safe use, and protects the blade from contamination. The present invention utilizes the interaction between the locking sheath and the first engaging block on the locking sheath and the first and second engaging slots, allowing the blade to be released from and retracted into the sheath by pressing and pushing with the fingers.

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front structural schematic diagram of the scalpel blade of the present invention when it is stored in the scalpel sheath;

[0024] Figure 2 This is a schematic diagram of the reverse structure of the scalpel blade of the present invention when it is stored in the blade sheath;

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the scalpel of the present invention;

[0026] Figure 4 This is a schematic structural diagram of the scalpel of the present invention in a disassembled state;

[0027] Figure 5 This is a schematic diagram of the front structure of the blade body of the scalpel of the present invention;

[0028] Figure 6 This is a schematic diagram of the reverse side structure of the blade body of the scalpel of the present invention;

[0029] Figure 7 is a schematic diagram showing a scalpel blade of the present invention exposed outside a sheath;

[0030] Description of reference numerals:

[0031] 1-handle; 2-sleeve; 3-blade; 11-second slot; 12-scale; 13-marking part; 14-handle; 15-second strip groove; 16-second block; 17-first strip groove; 18-first slot; 20-first hollow part; 21-second hollow part; 22-locking sleeve; 23-anti-slip stripes; 24-third hollow part; 25-slide; 26-opening; 27-connecting part. DETAILED DESCRIPTION

[0032] The following embodiments of the present invention are described in further detail with reference to 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.

[0033] Example

[0034] See attached Figure 1-7 A preferred embodiment of the present invention provides a surgical knife comprising a blade body and a sheath 2, wherein the sheath 2 is slidably mounted on the blade body. The blade body comprises a blade 3 and a handle 1. The sheath 2 and handle 1 are both made of plastic, while the blade 3 is made of stainless steel. The blade 3 is detachably connected to the handle 1, and preferably, the blade 3 is snap-fitted to one end of the handle 1.

[0035] To facilitate the user's viewing of the internal structure of the sheath 2, the sheath 2 is transparent. An opening 26 is provided at one end of the sheath 2, and a locking sleeve 22 is provided at the other end. The locking sleeve 22 is slidably mounted on the handle 1. When the locking sleeve 22 is pressed along the width of the handle 1 and slid along the handle 1, the blade 3 can slide out through the opening 26. The locking sleeve 22 is connected to the sheath 2 via a connecting portion 27, which is elongated and extends along the length of the sheath 2. The sheath 2 is provided with a first hollow portion 20 and a second hollow portion 21, located on either side of the connecting portion 27 along the width of the handle 1. The second hollow portion 21 is L-shaped and can be modified in shape as needed. The inner wall of the locking sleeve 22 is provided with a first retaining block. A gap is left between the locking sleeve 22 and the handle 1. This gap is located on the side of the locking sleeve 22 away from the first retaining block. When the locking sleeve 22 is pressed along the width of the handle 1, the locking sleeve 22 moves in the direction of the finger's pressure, causing the connecting portion 27 to elastically deform, causing the connecting portion 27 to bend in the direction of the finger's pressure. The handle 1 is provided with a first retaining groove 18 and a second retaining groove 11. When the locking sleeve 22 is pressed along the width of the handle 1, the gap is wide enough to allow the first retaining block to disengage from the first retaining groove 18. The handle 1 is also provided with a second retaining block 16. The sheath 2 is provided with a third hollow portion 24 and a slide groove 25 located on one side of the third hollow portion 24 and extending along the length of the sheath 2.

[0036] The first clamping block cooperates with the first clamping slot 18, the knife handle 1 and the second clamping slot 11 respectively; the second clamping block 16 cooperates with the third hollow portion 24 and the sliding slot 25 respectively; to form the following different states:

[0037] When the first clamping block is located in the first clamping slot 18, the blade 3 is received in the sheath 2 and the blade 3 and the handle 1 are locked relative to the sheath 2; the second clamping block 16 is located in the third hollow portion 24;

[0038] When the locking sleeve 22 is pressed along the width direction of the knife handle 1 and the locking sleeve 22 is slid along the knife handle 1, the first clamping block 16 is disengaged from the first clamping groove 18 and slides along the knife handle 1 to the second clamping groove 11, and the second clamping block 16 is disengaged from the third hollow portion 24 and slides along the sliding groove 25, and the blade 3 passes through the knife sleeve 2 through the opening 26;

[0039] When the first clamping block is located in the second clamping slot 11 , the blade 3 is exposed outside the knife sleeve 2 and the blade 3 and the knife handle 1 are in a locked state relative to the knife sleeve 2 .

[0040] In order to facilitate the disengagement of the second clamping block 16 from the third hollow portion 24 , the second clamping block 16 is provided with an inclined surface that is inclined in a direction from approaching to moving away from the knife handle 1 .

[0041] In order to better position the sliding direction of the knife sheath 2, a first strip groove 17 and a second strip groove 15 extending along the length direction are respectively provided on both sides of the knife handle 1, and a first strip protrusion and a second strip protrusion are respectively provided on the inner wall of the knife sheath 2 at positions opposite to the first strip groove 17 and the second strip groove 15. The first strip protrusion and the second strip protrusion both protrude toward the knife handle 1, so that when the knife sheath 2 slides along the knife handle 1, the first strip protrusion slides along the first strip groove 17 and the second strip protrusion slides along the second strip groove 15.

[0042] To increase the friction between the user's fingers and the sheath 2, allowing the sheath 2 and locking sleeve 22 to slide more quickly relative to the handle 1, several anti-slip stripes 23 are provided on the outer wall of the sheath 2. To enhance the functionality of the scalpel, a scale 12 is provided on the end of the handle 1 away from the blade 3. To distinguish different scalpels, a marking 13, engraved with text or a pattern, is provided. A recessed grip 14 is also provided on the handle 1, located on the side of the handle 1 not marked with scale 12.

[0043] When the user needs to use the scalpel, they press the locking sleeve 22 and slide it along the handle 1 until the first latch engages with the second latch slot 11, exposing the blade 3 outside the sheath 2. When use is complete, they press the locking sleeve 22 and slide it in the opposite direction until the first latch engages with the first latch slot 18, storing the blade 3 in the sheath 2.

[0044] The above is only a preferred embodiment of the present invention and is not intended to limit 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 principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A surgical knife comprising a knife body and a knife sheath (2), wherein the knife sheath (2) is slidably mounted on the knife body, and the knife body comprises a blade (3) and a knife handle (1), characterized in that: The knife sleeve (2) has an opening (26) for the blade (3) to pass through, and the knife sleeve (2) is also provided with a locking sleeve (22), and the locking sleeve (22) is slidably sleeved on the knife handle (1). The inner wall of the locking sleeve (22) is provided with a first clamping block, and a gap is left between the locking sleeve (22) and the knife handle (1), and the gap is located on the side of the locking sleeve (22) away from the first clamping block. The knife handle (1) is provided with a first clamping groove (18) and a second clamping groove (11), and the first clamping block cooperates with the first clamping groove (18), the knife handle (1) and the second clamping groove (11) respectively to form the following different states: When the first clamping block is located in the first clamping slot (18), the blade (3) is accommodated in the knife sleeve (2), and the blade (3) and the knife handle (1) are in a locked state relative to the knife sleeve (2); When the locking sleeve (22) is pressed along the width direction of the knife handle (1) and the locking sleeve (22) is slid along the knife handle (1), the first clamping block is disengaged from the first clamping groove (18) and slides along the knife handle (1) to the second clamping groove (11), and the blade (3) passes through the knife sleeve (2) through the opening (26); When the first clamping block is located in the second clamping slot (11), the blade (3) is exposed outside the knife sleeve (2), and the blade (3) and the knife handle (1) are in a locked state relative to the knife sleeve (2); The knife handle (1) is further provided with a second clamping block (16), the knife sheath (2) is provided with a third hollow portion (24) and a slide groove (25) located on one side of the third hollow portion (24) and extending along the length direction of the knife sheath (2), and the second clamping block (16) is respectively matched with the third hollow portion (24) and the slide groove (25) to form the following different states: When the first card block is located in the first card slot (18), the second card block (16) is located in the third hollow portion (24); When the locking sleeve (22) is pressed along the width direction of the knife handle (1) and the locking sleeve (22) is made to slide along the knife handle (1), the second clamping block (16) is disengaged from the third hollow portion (24) and slides along the sliding groove (25); The second clamping block (16) has an inclined surface, and the inclined surface is inclined in a direction from approaching to moving away from the knife handle (1).

2. The surgical knife according to claim 1, characterized in that: The locking sleeve (22) is connected to the knife sleeve (2) via a connecting portion (27); a first hollow portion (20) and a second hollow portion (21) are provided on the knife sleeve (2); along the width direction of the knife handle (1), the first hollow portion (20) and the second hollow portion (21) are respectively located on both sides of the connecting portion (27).

3. The surgical knife according to claim 1, wherein: The knife handle (1) is provided with a first strip groove (17) and a second strip groove (15) arranged along its length direction, and the inner wall of the knife sleeve (2) is provided with a first strip protrusion and a second strip protrusion, the first strip protrusion slides along the first strip groove (17), and the second strip protrusion slides along the second strip groove (15).

4. The surgical knife according to claim 1, wherein: Anti-slip stripes (23) are provided on the outer wall of the knife sleeve (2).

5. The surgical knife according to claim 1, characterized in that: The knife handle (1) is provided with a scale (12).

6. The surgical knife according to claim 5, characterized in that: The scale (12) is located at an end away from the blade (3).

7. The surgical knife according to claim 1, characterized in that: The blade (3) is detachably connected to the handle (1).

8. The surgical knife according to claim 1, characterized in that: The knife sheath (2) is transparent.

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