Patent Application
20110100664
1. Field of the Invention
The present invention relates to a striking tool, and more particularly to a striking tool that can cushion and absorb vibration conducted to a grip.
2. Description of Related Art
A conventional striking tool comprises a shaft and a grip and may be hit to punch nails flush with a work surface. The shaft is made of metal. The grip is solid and is securely mounted around the shaft.
However, vibration caused by striking the tool is conducted to the grip which is held firmly so raising a risk of the tool moving to a different location and a following strike missing the tool or damaging the work surface or inducing pain or hand-arm vibration syndrome in a user. To overcome the shortcomings, the present invention tends to provide a striking tool to mitigate the aforementioned problems.
The main objective of the invention is to provide a striking tool that can cushion and absorb vibration conducted to a grip to reduce risk of injury and hand-arm vibration syndrome.
A striking tool has a shaft, two plugs, two springs and a grip. The shaft has an outer surface, a grip section and two spring sections. The grip section is formed on and protrudes from the outer surface of the shaft and has a diameter and two ends. The spring sections are respectively adjacent to the ends of the grip section and each spring section has a diameter smaller than the diameter of the grip section. The plugs are slidably and respectively mounted around the spring sections. The springs are compressibly and respectively mounted around the spring sections and each spring abuts a corresponding plug and the grip section. The grip is slidably mounted around the grip section and is securely connected with both of the plugs.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
With reference to
With further reference to
The struck end (11) is struck by a hammer, as shown in
The operational end (12) is opposite to the struck end (11). Preferably, the operational end (12) is connected to a quick-release device (B). The quick-release device (B) is capable of connecting to various chisels or other hand tools and the hand tool in accordance with the present invention can be used as a chisel or other hand tools for striking. The structure of the quick-release device (B) is well known in the prior art, so detailed description is omitted.
The grip section (13) is formed on and protrudes from the outer surface at the central segment of the shaft (10). The grip section (13) has two ends and a diameter.
The spring sections (14) are respectively adjacent to the ends of the grip section (13) and each spring section (14) has a diameter. The diameter of each spring sections (14) is smaller than the diameter of the grip section (13).
The shaft rims (15) are round and respectively defined around the ends of the grip sections (13).
The plugs (20) are slidably and respectively mounted around the spring sections (14). Each plug (20) has a maximal diameter, a plug hole (21), a plug rim (22) and a clamp rim (23).
The plug hole (21) is axially defined through the plug (20).
The plug rim (22) is formed on and protrudes from the plug (20), is defined around the plug hole (21), protrudes toward the grip section (13) and has an external diameter. The external diameter of the plug rim (22) is smaller than the maximal diameter of the plug (20).
The clamp rim (23) is formed on and protrudes from the plug rim (22), is defined around the plug hole (21), protrudes toward the grip section (13) and has an external diameter. The external diameter of the clamp rim (23) is smaller than the external diameter of the plug rim (22).
The springs (30) are compressibly and respectively mounted around the spring sections (14) and each spring (30) has two ends. The ends of each spring (30) abut a corresponding plug rim (22) and a corresponding shaft rim (15).
The grip (40) is a plastic handle covered with rubber for holding. The grip (40) is slidably mounted around the grip section (13), is securely connected with both of the plugs (20) and has a grip hole (41) and two ends.
The grip hole (41) is defined axially through the grip (40) and has two openings. The openings of the grip hole (41) are respectively and securely mounted around the plug rims (22) to allow the springs (30) to be clamped between the grip (40) and the clamp rims (23). Because the openings of the grip (40) are mounted securely around the plug rims (22), the grip (40) moves synchronously with both of the plugs (20).
The ends of the grip (40) abut both of the plugs (20) beside the plug rims (22) and the clamp rims (23).
With reference to
When the shaft (10) is pushed back by a reacting force and ascends, the shaft rim (15) which is close to the struck end (11) ascends to compress the corresponding spring (30). Similarly, the compressed spring (30) cushions and absorbs vibration and reduces likelihood of injury.
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
