Safety scalpel

Abstract

The utility model relates to a surgical knife product, concretely relates to a safe surgical knife, including, knife handle, the knife handle front end is equipped with blade fixed slot, the blade fixed slot is fixed blade in, the knife cover is along the length direction setting through cavity, through the through cavity sliding sleeve joint in the knife handle, make the knife cover on the knife handle sliding, selectively cover or expose the blade, wherein, the knife handle side surface is equipped with lock dead slot, the knife cover inner wall is equipped with first protruding piece, when the first protruding piece slides into the lock dead slot, the blade is safely closed in the knife cover and the knife cover cannot slide along the knife handle. The utility model relates to a safe surgical knife, when operating, only need to move the knife cover to the first locking position and expose the blade to operate, after the operation is completed, the knife cover is slid forward to the second locking position and locks the knife cover, covers the blade and avoids the secondary use of the surgical knife.

Description

Technical Field

[0001] This utility model relates to surgical scalpel products, specifically a safety surgical scalpel. Background Technology

[0002] Current plastic-handled scalpels have many advantages, such as high safety and good operability. The typical structure includes a blade, a plastic handle, and a sheath. The blade is directly fixed to the plastic handle, and the sheath is placed over the blade. The sheath needs to be removed during surgery, and after use, the sheath is put back in for disposal.

[0003] Because re-sleeving a scalpel can easily cause accidental injury with the blade tip, locking plastic-handled scalpels have been developed. Currently manufactured locking scalpels typically use a blade mounted on a movable slider, which slides within the handle. To use, the slider is pushed out of the handle, and after use, the slider is slid back into the handle to hide the blade and lock it in place, preventing reuse and ensuring safety. However, this type of sliding blade scalpel has the following drawbacks: First, because the blade slides with the slider within the handle, even slight displacement of the slider during surgery due to instability can easily affect the accuracy of surgical positioning. Second, this structure overturns the traditional scalpel design; the change in handle necessitates a change in the grip posture during surgery, and the structure is significantly more complex than that of ordinary scalpels, increasing the cost of disposable scalpels.

[0004] Therefore, it is necessary to design a safe scalpel with a handle consistent with traditional scalpels, while also being able to be easily locked to prevent reuse. Utility Model Content

[0005] This utility model discloses a safe surgical scalpel. During surgery, the scalpel sheath is moved backward to the first locking position to expose the blade for surgery. After the surgery is completed, the scalpel sheath is slid forward to the second locking position to lock the scalpel sheath, covering the blade and preventing the surgical scalpel from being used again.

[0006] This utility model is achieved through the following technical solution: A safety scalpel, comprising, A knife handle, wherein a blade fixing groove is provided at the front end of the knife handle, and a blade is fixed in the blade fixing groove; A blade sheath, wherein a through cavity is provided along the length direction, and the blade sheath is slidably fitted onto the blade handle through the through cavity, so that when the blade sheath slides on the blade handle, it selectively covers or exposes the blade. The blade handle has a locking groove on its side, and the inner wall of the blade sleeve has a first protrusion. When the first protrusion slides into the locking groove, the blade is safely enclosed in the blade sleeve and the blade sleeve cannot slide along the blade handle.

[0007] Furthermore, the side of the blade sheath is provided with a through hole, and the first protrusion is elastically connected to the through hole by a connecting strip, and can be disengaged from the locking groove by the deformation of the connecting strip.

[0008] Furthermore, a first guide strip and a second guide strip are respectively provided on both sides of the handle, and a first sliding groove and a second sliding groove are correspondingly provided on the inner wall of the blade sleeve, which slide in cooperation with the first guide strip and the second guide strip respectively.

[0009] Furthermore, the second guide bar is provided with a first limiting step and a second limiting step; the second groove of the blade sleeve is provided with a second protrusion; When the second protrusion engages with the first limiting step, the blade sleeve completely covers the blade; When the second protrusion engages with the second limiting step, the tip of the blade protrudes from the blade sleeve.

[0010] Furthermore, the first limiting step is composed of two semi-circular protrusions spaced apart; the second limiting step is composed of a semi-circular protrusion and a triangular protrusion, wherein the high point of the triangular protrusion is close to the semi-circular protrusion and the low point is flush with the side of the tool holder.

[0011] Furthermore, the upper end of the tool holder is provided with a first slot and a second slot; The top of the blade sheath is provided with a pressing part, and a locking block is provided at the lower part of the end near the blade. When the second protrusion engages with the first limiting step, the locking block is embedded in the second locking groove; When the second protrusion engages with the second limiting step, the locking block is embedded in the first locking groove.

[0012] Furthermore, the locking groove, the first limiting step, and the second limiting step are arranged sequentially from the front end to the rear end along the tool holder; when the locking block is located in the first locking groove, the first protrusion can slide into the locking groove to achieve locking.

[0013] The beneficial effects of this utility model are as follows: 1. By setting a through cavity in the scalpel sheath, the scalpel is put into use by sliding the scalpel sheath on the handle; then, by setting a locking groove and a first protrusion, after the scalpel is used, the first protrusion is directly inserted into the locking groove by sliding the scalpel sheath, thereby fixing the scalpel sheath and the handle so that they can no longer slide.

[0014] Second, by setting a through hole on the side of the blade sheath, the first protrusion is elastically connected by a connecting strip, so that the first protrusion can be pried by the connecting strip, thus preventing the first protrusion from accidentally sliding into the locking groove and causing the scalpel to become unusable.

[0015] Third, by setting the first guide bar to cooperate with the first slide groove and the second guide bar to cooperate with the second slide groove, the sliding of the tool holder and the tool shank is made more precise.

[0016] Fourth, by setting a first limiting step and a second limiting step on the second guide bar, and setting a second protrusion on the blade sheath, the scalpel can be closed and in working state by sliding the second protrusion into the first limiting step or the second limiting step.

[0017] 5. By setting the first limiting step as two semi-circular protrusions, and the second limiting step as a semi-circular protrusion and a triangular protrusion, and making the high point of the triangular protrusion close to the semi-circular protrusion and the low point aligned with the side of the handle, the sheath can easily slide from the rear end to the front end, but cannot slide out of the handle from the second step.

[0018] VI. By setting the first slot and the second slot, and by setting the pressing part on the blade sleeve, and by setting the locking block on the pressing part, the position of the blade sleeve is further limited by the locking block cooperating with the first slot and the second slot, so that the blade sleeve is not easy to slide when in use after the blade sleeve is fixed in position by the second protrusion and the first step and the second step.

[0019] 7. By setting the first slot to be longer, the first protrusion slides into the locking slot and the locking block remains in the first slot, which can better fix the position of the blade sleeve. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of this utility model from another angle.

[0022] Figure 3 This is a schematic diagram of the tool holder structure.

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the tool holder.

[0024] Figure 5 A magnified schematic diagram of a portion of the tool holder.

[0025] Figure 6 This is a schematic diagram of the three states of a surgical scalpel. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0027] like Figure 1-6 As shown, Example 1, The handle 10 has a blade fixing groove 101 at its front end, and a blade 30 is fixed in the blade fixing groove 101. A blade sheath 20 is provided with a through cavity 201 along its length. The blade sheath 20 is slidably sleeved on the blade handle 10 through the through cavity 201, so that when the blade sheath 20 slides on the blade handle 10, it selectively covers or exposes the blade 30. The blade handle 10 has a locking groove 106 on its side and a first protrusion 202 on the inner wall of the blade sleeve 20. When the first protrusion 202 slides into the locking groove 103, the blade 30 is safely enclosed in the blade sleeve 20 and the blade sleeve 20 cannot slide along the blade handle 10.

[0028] Specifically, in order to prevent the first protrusion 202 from sliding out again after it slides into the locking groove 103, the inner edge of the locking groove 103 is set at a right angle, while the outer side is set at a slope.

[0029] Furthermore, to prevent the first protrusion 202 from accidentally sliding into the locking groove 103 when the scalpel is not in use, a through hole 204 is provided on the side of the scalpel sheath 20. The first protrusion 202 is elastically connected to the through hole 204 by a connecting strip 2041, and can be disengaged from the locking groove 106 by the deformation of the connecting strip 2041, so that the first protrusion 202 can slide out of the locking groove 103 by prying the connecting strip 2041. Example

[0030] Based on Embodiment 1, in order to make the blade sleeve 20 slide more smoothly on the blade handle 10 and less prone to deflection, a first guide strip 107 and a second guide strip 108 are respectively provided on both sides of the blade handle 10. A first sliding groove 206 and a second sliding groove 207 are provided on the blade sleeve 20. The first sliding groove 206 matches the first guide strip 107, and the second sliding groove 207 matches the second guide strip 108. The inner wall of the blade sleeve 20 is correspondingly provided with the first sliding groove 206 and the second sliding groove 207, which slide in cooperation with the first guide strip 107 and the second guide strip 108 respectively.

[0031] Example 3, based on Example 2, To facilitate and stabilize the scalpel, the second guide bar 108 is provided with a first limiting step 104 and a second limiting step 105; the second groove 207 of the scalpel sheath 20 is provided with a second protrusion 203; When the second protrusion 203 is engaged with the first limiting step 104, the sheath 20 completely covers the blade 30, and the scalpel is in a closed state; When the second protrusion 203 is engaged with the second limiting step 105, the front end of the blade 30 protrudes from the blade sheath 20, and the scalpel is in the working state.

[0032] Furthermore, the first limiting step 104 is composed of two semi-circular protrusions spaced apart; the second limiting step 105 is composed of a semi-circular protrusion and a triangular protrusion, wherein the high point of the triangular protrusion is close to the semi-circular protrusion and the low point is flush with the side of the tool holder 10.

[0033] Furthermore, in order to ensure the stability of the fit between the blade sheath and the blade handle, the upper end of the blade handle 10 is provided with a first groove 102 and a second groove 103; The top of the blade sheath 20 is provided with a pressing part 205, and a notch is provided on the blade sheath 20. The lower middle part of the pressing part 205 is fixed on the notch, and a locking block 2051 is provided at the lower part of the end near the blade 30. When the second protrusion 203 is engaged in the first limiting step 104, the locking block 2051 is embedded in the second locking groove 103; When the second protrusion 203 is engaged in the second limiting step 105, the locking block 2051 is embedded in the first locking groove 102.

[0034] Furthermore, the locking groove 106, the first limiting step 104, and the second limiting step 105 are arranged sequentially from the front end to the rear end along the tool holder 10; when the locking block 2051 is located in the first locking groove 102, the first protrusion 202 can slide into the locking groove 106 to achieve locking.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A safety scalpel, characterized by, include, The handle (10) has a blade fixing groove (101) at the front end, and the blade (30) is fixed in the blade fixing groove (101). A blade sheath (20) is provided with a through cavity (201) along its length. The blade sheath (20) is slidably sleeved on the blade handle (10) through the through cavity (201), so that when the blade sheath (20) slides on the blade handle (10), it selectively covers or exposes the blade (30). The handle (10) has a locking groove (106) on its side, and the inner wall of the sleeve (20) has a first protrusion (202). When the first protrusion (202) slides into the locking groove (106), the blade (30) is safely enclosed in the sleeve (20) and the sleeve (20) cannot slide along the handle (10).

2. A safety scalpel according to claim 1 wherein, The side of the blade sheath (20) is provided with a through hole (204). The first protrusion (202) is elastically connected to the through hole (204) by a connecting strip (2041) and can be disengaged from the locking groove (106) by the deformation of the connecting strip (2041).

3. A safety scalpel according to claim 1 or 2, wherein, The handle (10) is provided with a first guide bar (107) and a second guide bar (108) on both sides respectively. The inner wall of the blade sleeve (20) is provided with a first sliding groove (206) and a second sliding groove (207) respectively, which slide in cooperation with the first guide bar (107) and the second guide bar (108).

4. A safety scalpel according to claim 3 wherein, The second guide bar (108) is provided with a first limiting step (104) and a second limiting step (105); the second slide groove (207) of the blade sleeve (20) is provided with a second protrusion (203); When the second protrusion (203) engages with the first limiting step (104), the blade sheath (20) completely covers the blade (30). When the second protrusion (203) is engaged with the second limiting step (105), the front end of the blade (30) protrudes from the blade sleeve (20).

5. A safety scalpel according to claim 4 wherein, The first limiting step (104) is composed of two semi-circular protrusions spaced apart; the second limiting step (105) is composed of a semi-circular protrusion and a triangular protrusion, wherein the high point of the triangular protrusion is close to the semi-circular protrusion and the low point is flush with the side of the tool holder (10).

6. A safe surgical scalpel according to claim 4, characterized in that, The upper end of the handle (10) is provided with a first slot (102) and a second slot (103); The top of the blade sheath (20) is provided with a pressing part (205), and a locking block (2051) is provided at the lower part of the end near the blade (30). When the second protrusion (203) is engaged in the first limiting step (104), the locking block (2051) is embedded in the second locking groove (103). When the second protrusion (203) is engaged in the second limiting step (105), the locking block (2051) is embedded in the first locking groove (102).

7. A safety scalpel according to claim 6 wherein, The locking groove (106), the first limiting step (104), and the second limiting step (105) are arranged sequentially from the front end to the rear end along the handle (10); when the locking block (2051) is located in the first locking groove (102), the first protrusion (202) can slide into the locking groove (106) to achieve locking.

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