Chainsaw

Patent metadata

Field	Value
Publication number	US-9381665-B2
Application number	US-201314378648-A
Country	US
Kind code	B2
Filing date	Feb 12, 2013
Priority date	Feb 13, 2012
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A chainsaw in which a remaining amount of chain oil to be supplied to a saw chain can be easily checked is provided. In a chainsaw 1 including: a saw chain 6 driven by a motor embedded in a main body; and an oil tank 11 in which the chain oil to be supplied to the saw chain 6 in wood cutting process is stored, an illumination unit (LED 15 ) is provided in vicinity of the oil tank 11 . In this manner, the chain oil of the oil tank 11 positioned on a left side of the LED 15 can be illuminated. This illumination unit is configured to be used also as an illuminating device for illuminating the vicinity of the saw chain 6 , that is, an area indicated by dotted lines from 21 c to 21 d . According to the present invention, in a dark location, the remaining amount of the chain oil can be checked, and besides, a positional relationship among the chainsaw 1 main body, the saw chain 6 , and the periphery thereof can be easily visually checked, so that the working efficiency can be improved.

First claim

The invention claimed is:

1. A chainsaw comprising:
a saw chain driven by a driving source housed inside a housing;
a guide bar attached to the housing so as to protrude frontward, which guides rotation of the saw chain; and
an oil tank housed inside the housing, in which chain oil to be supplied to the saw chain is stored,
wherein the oil tank is made of a transparent or semi-transparent material,
the oil tank is provided so that at least a part thereof is visually checkable from outside of the housing,
an illumination unit for illuminating the oil tank is provided inside the housing, and
the illumination unit is configured to emit light to simultaneously illuminate the oil tank and a part of the saw chain, part of the light to be emitted from the illumination unit being transmitted through the oil tank, or reflected by the oil tank, to reach an outside from a lateral side of the housing, and another part of the light being transmitted toward the saw chain from a front side of the housing.

2. The chainsaw according to claim 1 , wherein an oil observation window for checking a remaining amount in the oil tank from the outside of the housing is formed in the housing.

3. The chainsaw according to claim 2 , wherein
the oil tank is arranged between the illumination unit and the oil observation window, and
the illumination unit is an LED provided in vicinity of a side surface of the oil tank.

4. The chainsaw according to claim 3 , wherein a part of light emitted from the LED is directly emitted to the oil tank or is reflected and emitted thereto.

5. The chainsaw according to claim 1 , wherein
the illumination unit is provided inside a front wall of the housing, and illuminates a part of the saw chain through a through hole formed on the front wall, and
a part of the light emitted from the illumination unit illuminates the oil tank.

6. The chainsaw according to claim 5 ,
wherein a cover member in which the light transmits is provided to the through hole formed on the front wall.

7. The chainsaw according to claim 6 , wherein the cover member is a light guiding member in which the light transmits and which guides the light in a predetermined direction.

8. The chainsaw according to claim 7 , wherein the light guiding member is a prism on which a part of incident light reflects or refracts toward the oil tank and in which the rest of the incident light transmits.

9. The chainsaw according to claim 5 , wherein the through hole is arranged at a position of the front wall of the housing, which is on an upper side than a lower blade of the saw chain, and besides, on a more-left side than a rotational plane of the saw chain.

10. The chainsaw according to claim 5 , wherein
an axial line of the light emitted from the through hole is set in a direction which is slightly lower than a horizontal plane, and besides, which crosses a rotational plane of the saw chain, and
the horizontal plane is a plane extending in a front/back direction of the chainsaw, the plane crossing the rotational plane of the saw chain.

Assignees

• Hitachi Koki Kk

Inventors

• Onose Miyoji
• Sagawa Kouji
• Matsuno Satoru
• Etou Yasuo
• Nakayama Ai
• Shimizu Yasutaka

Classifications

• B27B17/12 Primary

  Lubricating devices specially designed for chain saws · CPC title

• B23D57/023

  hand-held or hand-operated · CPC title

• B27B17/00

  Chain saws; Equipment therefor {(slotting or mortising machines equipped with chain cutters B27F5/06)} · CPC title