초록 ▼

It is an object of the invention to provide an effective technique for reducing the manufacturing costs of a handle mounted to a power tool. According to the invention, a representative handle may comprise a handle body, a grip, an elastic element and an elastic outer surface member. The grip is hol

It is an object of the invention to provide an effective technique for reducing the manufacturing costs of a handle mounted to a power tool. According to the invention, a representative handle may comprise a handle body, a grip, an elastic element and an elastic outer surface member. The grip is hollow-shaped and the handle body is inserted into the grip. The elastic element is disposed between the inner surface of the grip and the outer surface of the handle body to apply a biasing force to the grip upon movement of the grip with respect to the handle body when vibration of the power tool is transmitted from the handle body to the grip. The elastic outer surface member covers the outer surface of the grip. The elastic outer surface member is integrally formed with the elastic element. As a result, the manufacturing costs can be reduced compared with known construction in which the elastic outer surface member and the elastic element are separately formed.

대표청구항 ▼

We claim: 1. A handle comprising: a handle body that can be mounted to a power tool, a hollow grip into which the handle body is inserted, the grip being coupled to the inserted handle body such that the grip can move with respect to the handle body, an elastic element disposed between an inner sur

We claim: 1. A handle comprising: a handle body that can be mounted to a power tool, a hollow grip into which the handle body is inserted, the grip being coupled to the inserted handle body such that the grip can move with respect to the handle body, an elastic element disposed between an inner surface of the grip and an outer surface of the handle body when viewed along a longitudinal axis of the handle, wherein the elastic element applies a biasing force to the grip upon movement of the grip with respect to the handle body when vibration of the power tool is transmitted from the handle body to the grip, an elastic outer surface member that covers the outer surface of the grip, the elastic outer surface member being integrally formed with the elastic element, and a through hole formed through the grip, the through hole extending in a direction crossing an axial direction of the grip, wherein the elastic element and the elastic outer surface member are connected to each other via a connecting portion that lies in the through hole. 2. The handle as defined in claim 1, wherein the elastic element is disposed within the grip outward of a position of mounting the handle body to the power tool. 3. The handle as defined in claim 1 further comprising a pivot section that couples the grip to the handle body, wherein the pivot section allows the grip to rotate with respect to the handle body when vibration of the power tool is transmitted from the handle body to the grip, and wherein the elastic element is disposed in a region outside the pivot section between the handle body and the grip and applies a biasing force to the grip upon rotation of the grip on the pivot with respect to the handle body when vibration of the power tool is transmitted from the handle body to the grip. 4. The handle as defined in claim 1, wherein the elastic element is disposed outward of a pivot section within the grip. 5. The handle as defined in claim 1, wherein the elastic element is fitted onto the outer surface of an inserted end of the handle body when the handle body is inserted into the grip in the axial direction in order to mount the handle body to the grip, and wherein the connecting portion prevents the elastic element to move in the axial direction. 6. The handle as defined in claim 1, wherein the grip is coupled to the handle body such that the grip can rotate in all directions with respect to the handle body, and wherein the elastic element applies a biasing force to the grip upon rotation of the grip in all directions with respect to the handle body. 7. The handle as defined in claim 6, wherein one of the grip and the handle body has a spherical portion and the other of the grip and the handle body has a concave portion that is complementary to the spherical portion, and wherein the grip is coupled to the handle body via the spherical portion and the concave portion such that the grip can be rotated in all directions with respect to the handle body. 8. The handle as defined in claim 1, wherein the handle body is selectively mounted to different kinds of power tools, and wherein the grip is adapted and arranged such that a natural frequency of the grip can be changed according to the kind of power tool to which the handle is mounted. 9. The handle as defined in claim 8 further comprising a pivot that connects the grip to the handle body, wherein the pivot allows the grip to rotate on the pivot with respect to the handle body when vibration of the power tool is transmitted from the handle body to the grip, and wherein a distance between the pivot and a center of gravity of the grip can be changed in the grip so that the natural frequency of the grip can be changed by changing said distance with the handle body mounted to the power tool. 10. The handle as defined in claim 8, wherein the change of the natural frequency of the grip can be made by at least one of selectively mounting at least one of weights of different kinds varying in weight or by adjusting a position of mounting the weight in the grip in a longitudinal direction of the grip. 11. A handle comprising: a handle body designed to be selectively mounted to different kinds of power tools, a grip coupled to the handle body such that the grip can move with respect to the handle body, an elastic element disposed between the grip and the handle body when viewed along a longitudinal axis of the handle, the elastic element applying a biasing force to the grip upon movement of the grip with respect to the handle body, and a through hole formed through the grip, the through hole extending in a direction crossing an axial direction of the grip, wherein the elastic element and an elastic outer surface member are connected to each other via a connecting portion that lies in the through hole, wherein a natural frequency of the grip can be changed according to the kind of power tool to which the handle is mounted. 12. The handle as defined in claim 11 further comprising a pivot that connects the grip to the handle body, wherein the pivot allows the grip to rotate around the pivot with respect to the handle body when vibration of the power tool is transmitted from the handle body to the grip, and wherein a distance between the pivot and a center of gravity of the grip can be changed in the grip so that the natural frequency of the grip can be changed by changing said distance with the handle body mounted to the power tool. 13. The handle as defined in claim 11, wherein the natural frequency of the grip can be changed by at least one of selectively mounting at least one of weights of different kinds varying in weight or by adjusting a position of mounting the weight in the grip in a longitudinal direction of the grip. 14. A power tool comprising: a tool body, a main handle and an auxiliary handle to operate the tool body, wherein the auxiliary handle comprising: a handle body mounted to the tool body, a grip coupled to the handle body such that the grip can move with respect to the handle body and an elastic element disposed between the grip and the handle body when viewed along a longitudinal axis of the handle, the elastic element applying a biasing force to the grip upon movement of the grip with respect to the handle body, wherein a natural frequency of the grip can be changed such that the natural frequency of the grip is displaced from a frequency of vibration caused by the power tool when the auxiliary handle is mounted to the tool body, and a through hole formed through the grip, the through hole extending in a direction crossing an axial direction of the grip, wherein the elastic element and an elastic outer surface member are connected to each other via a connecting portion that lies in the through hole.