Folding knife with blade convenient to replace

Abstract

The folding knife with the blade convenient to replace comprises a surgical knife blade, a blade fixing seat and a handle, the surgical knife blade is detachably installed on the blade fixing seat, the tail end of the blade fixing seat is connected with the front end of the handle, the front side face of the blade fixing seat is provided with a containing groove for containing the surgical knife blade, a fixing assembly is arranged in the containing groove, and the handle is connected with the blade fixing seat. The blade fixing base is provided with a fixing assembly, the fixing assembly is matched with a blade groove of the surgical blade to fix the surgical blade, the blade fixing base is further provided with a locking assembly, and the locking assembly is provided with a first position and a second position which can move relative to the blade fixing base. The locking assembly is matched with the scalpel groove of the scalpel blade to limit the scalpel blade to move relative to the fixing assembly, and when the locking assembly is located at the second position, the scalpel blade can move relative to the fixing assembly. The surgical knife has the advantages that the surgical knife blade and the knife blade fixing seat are firmly connected and fixed, safety is good, the surgical knife blade can be disassembled, assembled and replaced by hands, and operation is easy and convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of knives, and more specifically, particularly relates to a folding knife with a blade that is convenient for replacing. Background Art

[0002] Folding knives are widely used in people's daily production and life. Traditional folding knives are generally large in size. When the blade is damaged, it is often impossible or difficult to replace the blade without assembly tools. The replacement blade is not only expensive, but also difficult to find a suitable blade.

[0003] The surgical blade itself has a specific blade groove and a uniform model. It is not only cheap but also easy to adapt. There will be no problem of being unable to replace it. When replacing it, no tools are required and it can be disassembled and assembled by hand.

[0004] For example, the Chinese utility model patent with patent number 202222954962.3 and the invention name is a scalpel with a slidable and detachable blade, which includes: a handheld shell, a scalpel body and a slide groove, a connecting spring is installed on the inner wall of the back of the handheld shell, a connecting plate is installed inside the handheld shell through the connecting spring, a connecting piece is installed on the front of the connecting plate, and a mounting plate is installed on the front of the connecting piece;

[0005] The outer side of the mounting plate is clamped with a scalpel body, the outer side of the scalpel body is penetrated by a connecting groove, and the scalpel body is connected to the mounting plate through the connecting groove;

[0006] A slide groove is provided on one side of the handheld shell, a spring body is installed on the outer side of the handheld shell through a mounting hole, and a push block is movably installed inside the slide groove.

[0007] The advantage of the above technical solution is that when the scalpel body is installed, the card plate slides into the card slot through the connecting slot. Since the width of the card slot is smaller than the width of the connecting slot, the card plate will be stuck in the rotating card slot, so that the scalpel body is installed. When disassembling, the staff provides a disassembly position through the disassembly arc, which is convenient for the staff to complete the disassembly of the scalpel body and makes it easy for the staff to replace the scalpel body when it is damaged or the blade is not sharp. The disadvantage is that the scalpel body is only fixed by the card slot and the card plate. When the scalpel body is subjected to a large force, it is easy to fall off from the connecting plate, which poses a certain safety hazard. Summary of the invention

[0008] The invention of the utility model aims to solve the above-mentioned technical problems and aims to provide a folding knife which is convenient for replacing blades, simple to operate and safe and convenient for replacing blades.

[0009] The utility model is achieved through the following technical solutions.

[0010] The utility model provides a folding knife for easy replacement of blades, comprising a surgical blade, a blade fixing seat and a handle, wherein the surgical blade is detachably mounted on the blade fixing seat, the tail end of the blade fixing seat is connected to the front end of the handle, the front side surface of the blade fixing seat is provided with a receiving groove for placing the surgical blade, a fixing component is provided in the receiving groove, the fixing component cooperates with a knife groove of the surgical blade to fix the surgical blade, the blade fixing seat is further provided with a locking component, the locking component has a first position and a second position capable of relative movement relative to the blade fixing seat, when the locking component is located at the first position, the locking component cooperates with the knife groove of the surgical blade to limit the movement of the surgical blade relative to the fixing component, when the locking component is located at the second position, the locking component is disengaged from the knife groove of the surgical blade, and the surgical blade can move relative to the fixing component.

[0011] In the above technical solution, when the surgical blade is installed on the blade fixing seat, the surgical blade and the blade fixing seat are connected and fixed by the fixing component and the knife groove of the surgical blade, and the surgical blade is limited to move relative to the fixing component by the locking component and the knife groove of the surgical blade, which can prevent the surgical blade from being separated from the fixing component and causing the surgical blade to fall off from the blade fixing seat. Compared with only relying on the fixing component to fix the surgical blade, it is safer. When the surgical blade needs to be replaced, it is only necessary to move the locking component to the second position to release the locking component and the knife groove of the surgical blade, so that the surgical blade can move relative to the fixing component, and the surgical blade can be removed from the blade fixing seat by the opposite operation of installing the blade, which is convenient to operate.

[0012] Preferably, the locking assembly includes a locking member, an elastic member and a driving member, the front end of the locking member cooperates with the knife groove of the surgical blade, the rear end of the locking member is connected to the driving member, the elastic member is arranged between the locking member and the driving member, one end of the elastic member abuts against the driving member, and the other end abuts against the blade fixing seat to provide elastic force for resetting the driving member. In this technical solution, the locking member can be moved to the second position by operating the driving member to release the cooperation with the knife groove of the surgical blade, which is convenient for replacing the surgical blade. When the force on the driving member is cancelled, under the elastic force of the elastic member, the driving member resets and drives the locking member to return to the first position to cooperate with the knife groove of the surgical blade. At this time, the surgical blade cannot move relative to the fixed assembly, so that the surgical blade cannot be replaced, and the surgical blade is prevented from falling off during normal use. The operation is simple and convenient, and the safety is higher.

[0013] Preferably, the locking member comprises a locking portion, a connecting plate and a connecting portion, wherein the locking portion and the connecting portion are respectively arranged on the front side of the connecting plate near the two ends, and the blade fixing seat is respectively provided with a first avoidance hole and a second avoidance hole penetrating the blade fixing seat at positions corresponding to the locking portion and the connecting portion, wherein the first avoidance hole is located in the accommodating groove, and the second avoidance hole is located outside the accommodating groove, and the locking portion extends through the first avoidance hole to the knife groove of the surgical blade to cooperate with the knife groove, and the driving member and the elastic member are placed in the second avoidance hole and the bottom of the driving member is connected and fixed with the connecting portion, the top of the driving member extends outside the second avoidance hole and is higher than the front side of the blade fixing seat, and the hole wall of the second avoidance hole is provided with an abutment portion for abutting with the elastic member at a position near the rear side of the blade fixing seat. In the present technical solution, the distance between the locking portion and the connecting portion can be expanded by the connecting plate, so as to facilitate the arrangement of the driving member on the blade fixing seat, facilitate the operation of the driving member, and avoid the driving member blocking the surgical blade and affecting the replacement of the surgical blade.

[0014] Preferably, the locking part, the connecting plate and the connecting part are integrally formed, wherein the locking part is a cylinder, the cylinder is vertically arranged relative to the connecting plate, the connecting part is a truncated cone provided with a connecting hole, the truncated cone is vertically arranged relative to the connecting plate, the driving member is a screw, the nail body of the screw is threadedly connected to the connecting hole, the outer diameter of the nail cap of the screw matches the aperture of the second avoidance hole, the elastic member is a compression spring, the top end of the compression spring abuts against the bottom of the nail cap, and the bottom end of the compression spring abuts against the abutting part. In the present technical solution, the locking part, the connecting plate and the connecting part are integrally formed, which is easy to form while ensuring strength. The locking part is a cylinder, and the connecting part is a truncated cone provided with a connecting hole, which has a simple structure and a small number of manufacturing processes to reduce manufacturing costs. The driving member is a screw, which is convenient and simple to connect with the locking member, and the compression spring is sleeved outside the nail body of the screw for easy installation.

[0015] Preferably, a lock installation groove is provided on the rear side of the blade fixing seat, the lock installation groove is connected to the first avoidance hole and the second avoidance hole, and the connecting plate is placed in the lock installation groove. In this technical solution, by providing a lock installation groove to place the connecting plate, when the lock is in the first position, the outer surface of the connecting plate can be flush with the rear side of the blade fixing seat, which can effectively prevent the lock from encountering external force collision to affect the locking effect of the surgical blade. At the same time, the rear side of the blade fixing seat is smooth and integrated as a whole, with good visual effect.

[0016] Preferably, a clamping piece is provided at the rear of the receiving groove for contacting with the side of the surgical blade, and the thickness of the clamping piece increases from front to back in the front-to-back direction of the receiving groove. In this technical solution, by providing the clamping piece, the surgical blade and the fixing assembly can be pressed tightly, and the loosening of the blade and the fixing assembly caused by manufacturing errors can be solved.

[0017] Preferably, the fixing assembly includes a mounting portion for the knife groove of the surgical blade to be inserted, and a slot for the surgical blade to be clamped is provided on the side of the mounting portion. In this technical solution, the knife groove of the surgical blade can be pushed into place along the slot provided in the mounting portion to complete the fixing of the surgical blade. When the surgical blade needs to be replaced, it only needs to be operated in the opposite direction. The structure is simple and the operation is convenient.

[0018] Preferably, the rear end of the blade holder is pivotally connected to the front end of the handle via a pivot, and the blade holder can be retracted into the storage slot provided in the handle by rotating around the pivot. In this technical solution, the blade holder can be retracted into the storage slot provided in the handle to avoid touching the surgical blade, and when not in use, the surgical blade can be avoided from being touched, making storage safer.

[0019] Preferably, the blade holder is provided with an opening-assisting portion for facilitating the blade holder to unfold when the blade holder is folded in the receiving slot. In this technical solution, when the blade holder needs to be opened outward from the receiving slot of the handle, the blade holder can be opened more easily by pushing the opening-assisting portion.

[0020] Preferably, the opening assisting portion is a convex block protruding outwardly relative to the surface of the blade holder. In this way, the structure is simple, and the blade holder can be opened outward from the receiving slot of the handle by pressing the convex block with fingers, which is easy and convenient to operate, and can also avoid touching the surgical blade when opening the blade holder, which is safer.

[0021] The beneficial effects of the utility model are that the surgical blade is firmly connected and fixed to the blade fixing seat. When the locking assembly is in the first position, the surgical blade will not accidentally fall off during normal use, and the safety is good; when the locking assembly is in the second position, the surgical blade can be disassembled, assembled and replaced by hand, and the operation is simple and convenient; the locking assembly has a simple structure and can be unlocked by pressing the driving member with the thumb of one hand, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is an exploded schematic diagram of the blade fixing seat of the utility model when equipped with a surgical blade;

[0024] Figure 3 This is an exploded schematic diagram of the blade fixing seat of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the lock of the utility model;

[0026] Figure 5 It is a schematic diagram of the cross-sectional structure of the cooperation between the driving member and the locking member of the utility model;

[0027] Figure 6 This is a front structural schematic diagram of the blade fixing seat of the utility model;

[0028] Figure 7 It is a structural schematic diagram of the fixing component of the utility model. DETAILED DESCRIPTION

[0029] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0030] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] The technical solution of the utility model is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0032] Example 1

[0033] The utility model provides a folding knife which is convenient for replacing a blade. Figure 1 , Figure 2 and Figure 7As shown, it includes a surgical blade 1, a blade fixing seat 2 and a handle 3, wherein the surgical blade 1 is detachably mounted on the blade fixing seat 2, the rear end of the blade fixing seat 2 is connected to the front end of the handle 3, wherein the surgical blade 1 itself has a specific blade groove 11. The front side of the blade fixing seat 2 is provided with a receiving groove 21 for placing the surgical blade 1, and a fixing component 4 is provided in the receiving groove 21. The fixing component 4 includes a mounting portion 41 for the knife groove 11 of the surgical blade 1 to be embedded, and a side portion of the mounting portion 41 is provided with a clamping groove 42 for clamping the surgical blade 1. The knife groove 11 of the surgical blade 1 is pushed into place along the clamping groove 42 provided on the mounting portion 41 to complete the fixing of the surgical blade 1. The blade fixing seat 2 is also provided with a locking component 5, and the locking component 5 has a first position and a second position that can be relatively moved relative to the blade fixing seat 2. When the locking component 5 is located at the first position, the locking component 5 cooperates with the knife groove 11 of the surgical blade 1 to limit the movement of the surgical blade 1 relative to the fixing component 4. When the locking component 5 is located at the second position, the locking component 5 is disengaged from the knife groove 11 of the surgical blade 1, and the surgical blade 1 can move relative to the fixing component 4.

[0034] like Figure 2 and Figure 6 As shown, in this embodiment, the locking assembly 5 includes a locking member, an elastic member 54 and a driving member 55, wherein the locking member includes a locking portion 51, a connecting plate 52 and a connecting portion 53, wherein the locking portion 51 and the connecting portion 53 are respectively arranged on the front side of the connecting plate 52 near the two ends, and the blade fixing seat 2 is respectively provided with a first avoidance hole 22 and a second avoidance hole 23 penetrating the blade fixing seat 2 at positions corresponding to the locking portion 51 and the connecting portion 53, wherein the first avoidance hole 22 is located in the accommodating groove 21, and the second avoidance hole 23 is located in the accommodating groove 21. The locking portion 51 passes through the first avoidance hole 22 and extends into the knife groove 11 of the surgical blade 1 to cooperate with the rear end of the knife groove 11 to limit the forward movement of the surgical blade 1. The driving member 55 and the elastic member 54 are placed in the second avoidance hole 23 and the bottom of the driving member 54 is connected and fixed to the connecting portion 53. The top of the driving member 55 extends to the outside of the second avoidance hole 23 and is higher than the front side of the blade fixing seat 2. The hole wall of the second avoidance hole 23 is provided with an abutting portion 231 for abutting with the elastic member 54 at a position close to the rear side of the blade fixing seat 2.

[0035] like Figure 4 and Figure 5As shown, as a further improvement, the locking portion 51, the connecting plate 52 and the connecting portion 53 are integrally formed, wherein the locking portion 51 is a cylinder, which is vertically arranged relative to the connecting plate 52, and the connecting portion 53 is a truncated cone provided with a connecting hole 531, which is vertically arranged relative to the connecting plate 52, and the driving member 55 is a screw, the screw body of the screw is threadedly connected to the connecting hole 531, and the outer diameter of the screw cap matches the hole diameter of the second avoidance hole 23, and the elastic member 54 is a compression spring, the top end of the compression spring abuts against the bottom of the nail cap, and the bottom end of the compression spring abuts against the abutting portion 231, wherein the abutting portion 231 is a block or a retaining edge that is slightly protruding inward from the hole wall of the second avoidance hole 23, and does not affect the extension of the truncated cone into the second avoidance hole 23. In this way, when the screw cap is pressed, the screw cap slides downward along the second avoidance hole 23, thereby pushing the connecting plate 52 to move downward, and the connecting plate 52 drives the cylinder to move downward along the first avoidance hole 22 to disengage from the knife groove 11 of the surgical blade 1 to achieve unlocking of the surgical blade 1. At this time, the surgical blade 1 can be moved forward relative to the blade fixing seat 2 for disassembly and replacement; when the pressing force on the screw cap is released, the screw slides upward along the second avoidance hole 23 to reset under the action of the elastic force of the compression spring, and the screw drives the connecting plate 52 to move upward, and the rear end of the cylinder extending into the knife groove 11 of the surgical blade 1 can limit the surgical blade 1 from moving forward relative to the blade fixing seat 2, thereby locking the surgical blade 1.

[0036] like Figure 3 As shown, as a further improvement, the rear side of the blade fixing seat 2 is provided with a lock installation groove 24, the lock installation groove 24 is connected with the first avoidance hole 22 and the second avoidance hole 23, the connecting plate 52 is placed in the lock installation groove 24, the cylinder is inserted into the first avoidance hole 22 from the rear side of the blade fixing seat 2 and extends to the accommodating groove 21 to cooperate with the rear end of the knife groove 11 of the surgical blade 1, the round table is inserted into the second avoidance hole 23 from the rear side of the blade fixing seat 2 and connected with the nail body of the screw, and the outer diameter of the round table is smaller than the inner diameter of the second avoidance hole 23 so as not to be blocked by the abutment portion 231. In this way, when the lock is in the first position, the outer surface of the connecting plate 52 can be flush with the rear side of the blade fixing seat 2, which can effectively prevent the lock from encountering external force collision and affecting the locking effect of the surgical blade 1.

[0037] Example 2

[0038] The structure of this embodiment is similar to that of embodiment 1, except that Figure 6As shown, a clamping member 25 for abutting against the side of the surgical blade 1 is provided at the rear portion of the accommodating groove 21, and the thickness of the clamping member 25 increases from front to back in the front-to-back direction of the accommodating groove 21, and the cross-sectional shape of the clamping member 25 is similar to a wedge. In this way, when the surgical blade 1 is installed in place, the clamping member 25 can tighten the surgical blade 1 and the fixing assembly 4, which can solve the looseness of the surgical blade 1 and the fixing assembly 4 caused by manufacturing errors.

[0039] Example 3

[0040] The structure of this embodiment is similar to that of embodiment 2, except that: Figure 1 As shown, the rear end of the blade fixing seat 2 is pivotally connected to the front end of the handle 3 via a pivot 6 , and the blade fixing seat 2 can be folded into a receiving slot 31 provided on the handle 3 by rotating around the pivot 6 as a rotating axis.

[0041] As a further improvement, the blade holder 2 is provided with an opening-assisting portion 7 for facilitating the opening of the blade holder 2 when the blade holder 2 is folded in the receiving slot 31. The opening-assisting portion 7 is a convex block protruding outward from the surface of the blade holder 2. In this way, the blade holder 2 can be opened outward from the receiving slot 31 of the handle 3 by pressing the convex block with a finger, which is simple and convenient to operate.

[0042] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A folding knife for easy replacement of blades, comprising a surgical blade, a blade fixing seat and a handle, wherein the surgical blade is detachably mounted on the blade fixing seat, the rear end of the blade fixing seat is connected to the front end of the handle, and characterized in that: The front side of the blade fixing seat is provided with a receiving groove for placing the surgical blade, and the receiving groove is provided with a fixing component, and the fixing component cooperates with the knife groove of the surgical blade to fix the surgical blade. The blade fixing seat is also provided with a locking component, and the locking component has a first position and a second position that can move relative to the blade fixing seat. When the locking component is in the first position, the locking component cooperates with the knife groove of the surgical blade to limit the movement of the surgical blade relative to the fixing component. When the locking component is in the second position, the locking component is disengaged from the knife groove of the surgical blade, and the surgical blade can move relative to the fixing component.

2. The folding knife for easy blade replacement according to claim 1, characterized in that: The locking assembly includes a locking member, an elastic member and a driving member. The front end of the locking member cooperates with the blade groove of the surgical blade, and the rear end of the locking member is connected to the driving member. The elastic member is arranged between the locking member and the driving member, and one end of the elastic member abuts against the driving member, and the other end abuts against the blade fixing seat to provide elastic force for resetting the driving member.

3. The folding knife for easy blade replacement according to claim 2, characterized in that: The locking member includes a locking portion, a connecting plate and a connecting portion, wherein the locking portion and the connecting portion are respectively arranged on the front side surface of the connecting plate near the two ends, and the blade fixing seat is respectively provided with a first avoidance hole and a second avoidance hole penetrating the blade fixing seat at positions corresponding to the locking portion and the connecting portion, wherein the first avoidance hole is located in the accommodating groove, and the second avoidance hole is located outside the accommodating groove, and the locking portion extends through the first avoidance hole to the knife groove of the surgical blade to cooperate with the knife groove, the driving member and the elastic member are placed in the second avoidance hole, and the bottom of the driving member is connected and fixed to the connecting portion, the top of the driving member extends to the outside of the second avoidance hole and is higher than the front side surface of the blade fixing seat, and the hole wall of the second avoidance hole is provided with an abutting portion for abutting with the elastic member at a position close to the rear side surface of the blade fixing seat.

4. The folding knife for easy blade replacement according to claim 3, characterized in that: The locking part, connecting plate and connecting part are integrally formed, wherein the locking part is a cylinder, the cylinder is vertically arranged relative to the connecting plate, the connecting part is a frustum provided with a connecting hole, the frustum is vertically arranged relative to the connecting plate, the driving member is a screw, the screw body is threadedly connected to the connecting hole, the outer diameter of the screw cap matches the aperture of the second avoidance hole, the elastic member is a compression spring, the top end of the compression spring abuts against the bottom of the nail cap, and the bottom end of the compression spring abuts against the abutting part.

5. The folding knife for easy blade replacement according to claim 3, characterized in that: A lock installation groove is provided on the rear side of the blade fixing seat, the lock installation groove is communicated with the first avoidance hole and the second avoidance hole, and the connecting plate is placed in the lock installation groove.

6. The folding knife for easy blade replacement according to claim 1, characterized in that: A clamping piece for abutting against the side surface of the surgical blade is provided at the rear of the accommodating groove, and the thickness of the clamping piece increases from front to back in the front-to-back direction of the accommodating groove.

7. The folding knife for easy blade replacement according to any one of claims 1 to 6, characterized in that: The fixing assembly comprises a mounting portion for the blade groove of the surgical blade to be embedded in, and a clamping groove for the surgical blade to be clamped is formed on the side of the mounting portion.

8. The folding knife for easy blade replacement according to claim 7, characterized in that: The rear end of the blade fixing seat is pivotally connected to the front end of the handle through a pivot, and the blade fixing seat can be rotated with the pivot as a rotating axis and can be stored in the storage groove provided on the handle.

9. The folding knife for easy blade replacement according to claim 8, characterized in that: The blade fixing seat is provided with an opening-assisting portion for facilitating the blade fixing seat to be unfolded when the blade fixing seat is folded in the storage groove.

10. The folding knife for easy blade replacement according to claim 9, characterized in that: The opening assisting portion is a convex block protruding outward relative to the surface of the blade fixing seat.

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