Rust-proof durable putty knife
By using an aluminum alloy handle and a high-carbon stainless steel blade in the putty knife, and by incorporating a water reservoir inside the handle to adjust the weight, the problems of easy breakage and non-adjustable weight in putty knives have been solved, achieving both blade durability and comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI VENUS IMPORT & EXPORT CO LTD
- Filing Date
- 2025-03-06
- Publication Date
- 2026-04-24
AI Technical Summary
Existing putty knives are prone to breakage during prolonged use, and their weight is not adjustable, resulting in uncomfortable use and high replacement costs.
A rust-resistant and durable putty knife was designed, featuring an aluminum alloy handle and a high-carbon stainless steel blade. A water reservoir is installed inside the handle, allowing for weight adjustment by filling with purified water. The blade has a breakable groove at the corner for easy repair, and incorporates a threaded connection and a rubber pad snap-fit structure.
It extends the lifespan of the blades, improves user comfort, reduces replacement costs, and enables the blades to be repairable and their weight to be flexibly adjustable.
Smart Images

Figure CN224161374U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of putty knives, and in particular to a rust-proof and durable putty knife. Background Technology
[0002] Putty knife is a tool widely used in construction, decoration, and craft production. It is mainly used for applying paint, putty, and other materials. In daily use, putty knife needs to have good scraping effect, wear resistance, and corrosion resistance. However, most putty knives on the market have some problems in long-term use. Therefore, a rust-proof and durable putty knife is proposed.
[0003] Existing putty knives are prone to having their blades broken or worn into rounded corners after prolonged use. As a result, when applying putty to wall corners, the broken blades cannot effectively create right angles. Replacing the blades directly would be relatively costly. In addition, the weight of most existing putty knives cannot be effectively adjusted, and different users have different weight requirements for putty knives. If the weight is too heavy or too light, it will make the user feel uncomfortable.
[0004] Therefore, in order to solve the problems existing in the above-mentioned technologies, a rust-proof and durable putty knife is proposed. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rust-proof and durable putty knife. Through a water storage chamber, users can add an appropriate amount of purified water to the chamber according to their needs, thereby increasing the weight of the handle and making it more comfortable to use. This avoids the previous problem of having to select a comfortable handle when purchasing a knife.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A rust-resistant and durable putty knife includes a handle, a blade at the front end of the handle, multiple break grooves on the upper and lower surfaces of the blade, a buckle block fixedly connected to the rear outer wall of the handle, a threaded cap threadedly connected to the center of the rear outer wall of the buckle block, a water storage cavity inside the handle, a buckle cap at the rear end of the handle, a bending groove in the middle of the rear outer wall of the buckle cap, and a storage groove in the front outer wall of the buckle cap.
[0008] The above technical solution ensures the hardness of the blade while also taking into account its toughness and corrosion resistance, thereby extending the service life of the blade.
[0009] Furthermore, the front outer wall of the handle is provided with a mounting groove, and the middle part of the rear end of the upper surface of the blade is provided with multiple fixing holes, and the rear end of the blade is tightly fitted with the inner wall of the mounting groove.
[0010] The above technical solution allows for a more convenient insertion of the blade into the handle.
[0011] Furthermore, the front end of the upper surface of the knife handle is provided with multiple threaded holes, and a bolt is provided inside the threaded hole. The bolt passes through the threaded hole and the fixing hole and is threadedly connected to the inner wall of the threaded hole.
[0012] The above technical solution makes it easier to install the blade and handle.
[0013] Furthermore, a protrusion is fixedly connected to the outer wall of the buckle block, and a rubber pad is fixedly connected to the inner wall of the storage groove. The buckle cover and the buckle block are engaged through the protrusion and the rubber pad.
[0014] The above technical solution makes it easier to connect the cover and the fastener.
[0015] Furthermore, the inner wall of the water storage cavity is fixedly connected with multiple partitions, and each partition has multiple through holes.
[0016] The above technical solution effectively reduces the flow of pure water in the water storage chamber by setting up a baffle, and allows pure water to enter different positions in the water storage chamber more conveniently through the through holes.
[0017] Furthermore, the handle is made of aluminum alloy, and the blade is made of high-carbon stainless steel;
[0018] The above technical solution uses an aluminum alloy handle, which effectively extends the handle's lifespan, and a high-carbon stainless steel blade, which ensures hardness while effectively preventing rust.
[0019] This utility model has the following beneficial effects:
[0020] 1. The present invention proposes a rust-proof and durable putty knife. When a notch appears at the corner of the blade, the cap can be pulled out, the bending groove can be aligned with the blade and inserted, and then the cap can be bent so that the damaged corner of the blade is broken off through the bending groove, thereby repairing the corner of the blade. This avoids the problem of having to replace the entire blade due to damage at the corner.
[0021] 2. The rust-proof and durable putty knife proposed in this utility model has a water storage chamber. Users can fill the water storage chamber with an appropriate amount of pure water according to their own needs, and then increase the weight of the knife handle to make it more comfortable to use. This avoids the problem of having to choose a knife handle with a comfortable grip when purchasing. Attached Figure Description
[0022] Figure 1 This is an isometric view of a rust-resistant and durable putty knife proposed in this utility model;
[0023] Figure 2 This is an isometric view of the blade in a rust-resistant and durable putty knife proposed in this utility model;
[0024] Figure 3 This is a schematic diagram of the handle of a rust-proof and durable putty knife proposed in this utility model;
[0025] Figure 4 This is an isometric view of the cover of a rust-proof and durable putty knife proposed in this utility model;
[0026] Figure 5 This is a cross-sectional view of a rust-resistant and durable putty knife proposed in this utility model.
[0027] Legend:
[0028] 1. Handle; 2. Cover; 3. Bolt; 4. Break groove; 5. Blade; 6. Fixing hole; 7. Mounting groove; 8. Threaded hole; 9. Buckle; 10. Protrusion; 11. Rubber pad; 12. Storage groove; 13. Bending groove; 14. Threaded cover; 15. Through hole; 16. Partition; 17. Water storage chamber. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] One embodiment provided by this utility model:
[0031] Reference Figure 1 , Figure 2 and Figure 3 :
[0032] A rust-resistant and durable putty knife includes a handle 1, a blade 5 at the front end of the handle 1, multiple break grooves 4 on the upper and lower surfaces of the blade 5, a buckle 9 fixedly connected to the rear outer wall of the handle 1, a threaded cap 14 threadedly connected to the center of the rear outer wall of the buckle 9, a water storage cavity 17 inside the handle 1, a buckle 2 at the rear end of the handle 1, a bending groove 13 in the middle of the rear outer wall of the buckle 2, and a storage groove 12 in the front outer wall of the buckle 2.
[0033] While ensuring the hardness of the blade 5, it also takes into account toughness and corrosion resistance, thereby extending the service life of the blade 5.
[0034] Reference Figure 3 and Figure 5 :
[0035] The front outer wall of the handle 1 has a mounting groove 7, and the middle of the rear end of the upper surface of the blade 5 has multiple fixing holes 6. The rear end of the blade 5 fits tightly against the inner wall of the mounting groove 7, making it easier to insert the blade 5 into the handle 1. The front end of the upper surface of the handle 1 has multiple threaded holes 8, and bolts 3 are installed inside the threaded holes 8. The bolts 3 pass through the threaded holes 8 and the fixing holes 6 and are threadedly connected to the inner wall of the threaded holes 8, which makes it easier to install the blade 5 to the handle 1.
[0036] Reference Figure 3 and Figure 4 :
[0037] The outer wall of the buckle 9 is fixedly connected to a protrusion 10, and the inner wall of the storage groove 12 is fixedly connected to a rubber pad 11. The buckle cover 2 and the buckle block 9 are engaged by the protrusion 10 and the rubber pad 11, which makes it easier to connect the buckle cover 2 and the buckle block 9.
[0038] Reference Figure 5 :
[0039] Multiple partitions 16 are fixedly connected to the inner wall of the water storage chamber 17. Each partition 16 has multiple through holes 15. The partitions 16 can effectively reduce the flow of pure water in the water storage chamber 17. The through holes 15 can make it easier for pure water to enter different positions in the water storage chamber 17. The handle 1 is made of aluminum alloy and the blade 5 is made of high carbon stainless steel. The aluminum alloy material of the handle 1 can effectively improve the service life of the handle 1. The high carbon stainless steel material of the blade 5 can effectively prevent the blade 5 from rusting while ensuring hardness.
[0040] Working principle: Before use, pull out the cover 2, then unscrew the threaded cover 14 and pour an appropriate amount of pure water into the water storage chamber 17 to increase the weight of the handle 1, making it more comfortable for the operator to hold. Then close the threaded cover 14 and the cover 2. When the blade 5 is used for a long time, the corner of the front end of the blade 5 may break. Then, pull out the cover 2, align the bending groove 13 with the blade 5 and insert it, then bend the cover 2 so that the bending groove 13 breaks the blade 5 through the breakage groove 4, thus exposing the corner of the rear end of the blade 5 for continued use.
[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.
Claims
1. A rust-resistant and durable putty knife, comprising a handle (1), characterized in that: The front end of the handle (1) is provided with a blade (5), and the upper and lower surfaces of the blade (5) are provided with multiple break grooves (4). The outer wall of the rear end of the handle (1) is fixedly connected with a buckle (9), and a threaded cap (14) is threadedly connected to the center of the outer wall of the rear end of the buckle (9). The handle (1) has a water storage cavity (17) inside. The rear end of the handle (1) is provided with a buckle cap (2), and the middle part of the outer wall of the rear end of the buckle cap (2) is provided with a bending groove (13). The outer wall of the front end of the buckle cap (2) is provided with a storage groove (12).
2. The rust-resistant and durable putty knife according to claim 1, characterized in that: The front end of the handle (1) is provided with a mounting groove (7), and the rear end of the blade (5) is provided with multiple fixing holes (6). The rear end of the blade (5) is tightly fitted with the inner wall of the mounting groove (7).
3. The rust-resistant and durable putty knife according to claim 2, characterized in that: The front end of the upper surface of the knife handle (1) is provided with multiple threaded holes (8), and a bolt (3) is provided inside the threaded hole (8). The bolt (3) passes through the threaded hole (8) and the fixing hole (6) and is threadedly connected to the inner wall of the threaded hole (8).
4. The rust-resistant and durable putty knife according to claim 1, characterized in that: The outer wall of the buckle (9) is fixedly connected to a protrusion (10), and the inner wall of the storage groove (12) is fixedly connected to a rubber pad (11). The buckle cover (2) and the buckle (9) are engaged by the protrusion (10) and the rubber pad (11).
5. The rust-resistant and durable putty knife according to claim 1, characterized in that: The inner wall of the water storage cavity (17) is fixedly connected with multiple partitions (16), and each partition (16) has multiple through holes (15).
6. The rust-resistant and durable putty knife according to claim 1, characterized in that: The handle (1) is made of aluminum alloy, and the blade (5) is made of high-carbon stainless steel.