A new type of pointed diving knife
By using SS420 material blades, hard and soft rubber handles, elastic buckles, and straps for fixation, the problem of complex and unstable structure of existing diving knives has been solved, achieving a diving knife design with good corrosion resistance, high comfort, quick insertion and removal, and multiple functions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING WATT ELECTRIC MOTORS CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-05-29
AI Technical Summary
Existing diving knives suffer from numerous structural components, high costs, poor aesthetics, and unstable fixation. Furthermore, the sheath parts are complex, leading to inconvenience in use and a potential risk of detachment.
A new type of pointed diving knife has been designed, using SS420 material blades coated with Teflon. The handle is made of hard and soft rubber through two-color injection molding, equipped with elastic buckles and straps for fixation. The straps are fixed to the thigh, and the sheath is ultrasonically welded, integrating multiple functions.
It achieves high corrosion resistance, comfortable grip, quick insertion and removal, and stable fixation of the cutting tool, with full functionality, reduced manufacturing costs, and increased service life.
Smart Images

Figure CN224295904U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of special cutting tool technology, and in particular to a novel pointed diving knife. Background Technology
[0002] Diving knives serve defensive and tooling purposes during diver training and combat missions. They can be used to kill ferocious underwater animals, quickly cut through tangled nets, and smash shellfish. Divers typically choose diving knives or other bladed diving tools, which have a wide range of uses, including prying animals and taking measurements. To resist seawater corrosion, in addition to stainless steel, titanium is also used.
[0003] All known diving knives have some drawbacks to varying degrees in their components. For example, one existing diving knife structure includes a blade, handle, hammer, and upper and lower locking tabs. The handle is a rigid, elongated rectangular plate structure with a narrow groove for inserting the handle. Because the connection between this elongated rectangular handle and the groove is extremely weak, the handle easily falls out. Therefore, not only is a locking hammer added to the end of the handle, but also upper and lower locking tabs are needed to securely clamp and position the handle within the handle. However, this would require the addition of three components, including the hammer, upper and lower clips, which would not only increase manufacturing costs, but also make the blade and handle clearly two different components. In addition, the extra clips would make the overall aesthetics of the diving knife less appealing. Furthermore, the cylindrical hammer's smooth, rounded surface would result in less friction during striking, making it easy for it to slip and fail during striking.
[0004] Another type of diving knife sheath structure includes parts such as a top cover, a bottom plate, a separate brake, and a spring-loaded pressure plate. This provides a locking position when the diving knife is inserted into the sheath, and the knife can be easily removed by pressing the brake. Its disadvantage is that the sheath's components have complex shapes and require four independently separated parts—the top cover, bottom plate, separate brake, and spring-loaded pressure plate—each secured with numerous screws, significantly increasing both the mold and production costs.
[0005] As can be seen from the above, the existing diving knives, whether in terms of the knife itself or the structure of the sheath and strap, all have several shortcomings. Therefore, there is an urgent need for a new type of diving knife to meet the needs of divers for cutting rope entanglements and knotted fishing nets, cutting seaweed, bomb disposal operations, and hammering shellfish. Utility Model Content
[0006] The purpose of this utility model is to provide a pointed diving knife that is fully functional, easy to use, reliable in quality, simple to fix, and can be quickly pulled out.
[0007] The technical solution to achieve the purpose of this utility model is: a novel pointed diving knife, including a blade, a handle, a sheath, and a strap;
[0008] The blade is sharpened on one side and serrated on the other; the sharpened side is designed with a groove for prying shellfish; the serrated side is designed with a hook for cutting fishing nets and lines.
[0009] The handle includes a hard rubber coating and a soft rubber coating. The hard rubber coating supports the shape of the entire handle and is injection molded to wrap around the blade. The soft rubber coating covers the hard rubber coating to increase grip comfort. There are two openings at the end of the handle for installing an elastic band. The elastic band is used to tie the diving knife to the head of the sheath after it is inserted into the sheath, thus securing the diving knife a second time.
[0010] The sheath is used to store the blade, preventing accidental injury to the user during diving operations and protecting the blade edge from damage. The sheath has two elastic latches that engage with the handle of the diving knife. When in use, the diving knife can be pulled out by pressing one of the elastic latches with two fingers. When not in use, the diving knife can be directly inserted into the sheath, and the two elastic latches will lock the diving knife in place.
[0011] The straps consist of two straps, which pass through the front and rear slots of the scabbard respectively. Buckles are installed at both ends of the straps. The straps are used to tie the scabbard to the thighs, and the straps are locked by inserting the buckles into each other to secure them to the thighs.
[0012] As a specific example, the blade is made of SS420 material.
[0013] As a specific example, the outer surface of the blade is coated with a layer of Teflon to prevent the blade from rusting when used in seawater.
[0014] As a specific example, the elastic band is installed at the hanging hole at the end of the diving knife handle to hang the diving knife, or to tie the diving knife to the head of the sheath after it is inserted into the sheath, thus providing a secondary fixation function.
[0015] As a specific example, the scabbard is assembled by ultrasonic welding of the scabbard cover and the scabbard back together.
[0016] Compared with the prior art, the significant advantages of this utility model are: (1) The blade is made of SS420 material and coated with a layer of Teflon on the outer surface. It has high hardness and good corrosion resistance. It is not easy to chip or roll during use and has a long service life; (2) The handle is covered with a double-color injection molding process of hard and soft rubber on the blade handle. It is not easy to fall off or shift. The soft rubber covering can be used with gloves on the seabed or without gloves. The touch is soft and enhances the user experience; (3) The sheath uses an integrated elastic buckle to directly fasten to the diving knife to prevent the diving knife from falling off. It can realize the quick insertion and removal function to deal with emergencies; (4) It is fixed to the thigh by a strap. It is easy to fix and has high reliability and comfort; (5) It integrates various functions such as cutting, sawing, hooking, prying bar, and hammering. It does not require carrying additional tools such as scissors and sickles. It has complete functions and is easy to use. Attached Figure Description
[0017] Figure 1 This is a structural schematic diagram of a novel pointed diving knife according to this utility model.
[0018] Figure 2 This is a schematic diagram of the strap structure in this utility model.
[0019] Figure 3 This is a schematic diagram of the installation structure of the elastic band in this utility model.
[0020] Figure 4 This is a schematic diagram of the structure of the sheath in this utility model. Detailed Implementation
[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0022] like Figure 1 As shown, this utility model discloses a novel pointed diving knife, which includes a blade 1, a handle 2, a sheath 3, and a strap 4.
[0023] The blade 1 is sharpened on one side and serrated on the other side; the sharpened surface is designed with a groove 5 for prying hard shellfish; the serrated surface is designed with a hook 6 for cutting fishing nets and fishing lines.
[0024] The handle 2 includes a hard rubber coating layer and a soft rubber coating layer. The hard rubber coating layer supports the shape of the entire handle and is injection molded and wrapped around the blade 1. The soft rubber coating layer covers the hard rubber coating layer, increasing the comfort of holding and reducing fatigue during long-term work. The handle 2 has two openings at the tail for installing an elastic band 7. The elastic band 7 is used to tie the diving knife to the head of the sheath 3 after it is inserted into the sheath 3, thus providing secondary fixation for the diving knife.
[0025] The sheath 3 is used to store the blade 1, preventing the blade 1 from accidentally injuring the user during diving operations and protecting the blade edge from damage. The sheath 3 is equipped with two elastic buckles 8, which are engaged with the handle 2 of the diving knife. When in use, the diving knife can be pulled out by pressing one of the elastic buckles 8 with two fingers. When not in use, the diving knife can be directly inserted into the sheath 3, and the two elastic buckles 8 will lock the diving knife in place.
[0026] like Figure 2 As shown, there are two straps 4, which pass through the front and rear slots of the sheath 3 respectively. The straps 4 are equipped with buckles 9 at both ends. The straps 4 tie the sheath 3 to the thigh. The straps 4 are locked by inserting the buckles 9 into each other, thus fixing the straps 4 to the thigh.
[0027] As a specific example, the blade 1 is made of SS420 material, which has high hardness and good corrosion resistance, and is not easy to chip during use.
[0028] As a specific example, the outer surface of the blade 1 is coated with a layer of Teflon to prevent the blade 1 from rusting when used in seawater.
[0029] As a specific example, such as Figure 3 As shown, the elastic band 7 is installed at the hanging hole at the end of the diving knife handle 2. It can be used to hang the diving knife, or to tie the diving knife to the head of the sheath 3 after it is inserted into the sheath 3, thus playing a secondary fixing role.
[0030] As a specific example, such as Figure 4 As shown, the sheath 3 is assembled by ultrasonic welding of the sheath cover 10 and the sheath back 11, which has a strong and firm adhesion, avoiding the risk of detachment caused by mechanical screw locking structure and improving the service life of the sheath 3.
[0031] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.
Claims
1. A novel pointed diving knife, characterized in that, Includes blade (1), handle (2), sheath (3), and strap (4); The blade (1) is sharpened on one side and serrated on the other side; the sharpened surface is designed with a groove (5) for prying shellfish; the serrated surface is designed with a hook (6) for cutting fishing nets and fishing lines. The handle (2) includes a hard plastic covering layer and a soft plastic covering layer. The hard plastic covering layer supports the entire handle's grip shape and is injection molded and wrapped around the blade (1). The soft plastic covering layer is wrapped around the hard plastic covering layer to increase grip comfort. The handle (2) has two openings at the tail for installing an elastic band (7). The elastic band (7) is used to tie the diving knife to the head of the sheath (3) after it is inserted into the sheath (3) to fix the diving knife a second time. The sheath (3) is used to store the blade (1), prevent the blade (1) from accidentally injuring the user during diving operations, and protect the blade (1) from damage. The sheath (3) is provided with two elastic buckles (8), which are engaged with the handle (2) of the diving knife. When in use, the diving knife can be pulled out by pressing one of the elastic buckles (8) with two fingers. When not in use, the diving knife can be directly inserted into the sheath (3), and the two elastic buckles (8) will lock the diving knife in place. There are two straps (4), which pass through the front and rear slots of the scabbard (3) respectively. Buckles (9) are installed at both ends of the straps (4). The straps (4) tie the scabbard (3) to the thigh. The straps (4) are locked by inserting the buckles (9) into both ends, thus fixing the straps (4) to the thigh.
2. The novel pointed diving knife according to claim 1, characterized in that, The blade (1) is made of SS420 material.
3. The novel pointed diving knife according to claim 1, characterized in that, The outer surface of the blade (1) is coated with a layer of Teflon to prevent the blade (1) from rusting when used in seawater.
4. The novel pointed diving knife according to claim 1, characterized in that, The elastic band (7) is installed at the hanging hole at the end of the diving knife handle (2) to hang the diving knife, or to tie the diving knife to the head of the sheath (3) after it is put into the sheath (3), so as to play a secondary fixing role.
5. The novel pointed diving knife according to claim 1, characterized in that, The sheath (3) is assembled by ultrasonic welding of the sheath cover (10) and the sheath back (11).