Gardening trimmer

Patent metadata

Field	Value
Publication number	US-11963489-B2
Application number	US-202117321949-A
Country	US
Kind code	B2
Filing date	May 17, 2021
Priority date	May 20, 2020
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

A gardening trimmer may include: a conversion mechanism for converting rotational motion of a prime mover to linear motion along a first direction; a blade for moving in reciprocating motion relative to a guide bar and including a plurality of slots; and a plurality of guide members each disposed in a corresponding slot of the plurality of slots of the blade. The plurality of slots may include: at least one first slot in which a corresponding guide member of the guide members that is connected to a housing is disposed. A combination of the slots and the guide members may include: a first combination to reduce frictional resistance generated by the reciprocating motion; and a second combination to reduce vibration generated by the reciprocating motion, and at least one combination of the at least one first slot and its corresponding guide member is the second combination.

First claim

What is claimed is:

1. A gardening trimmer, comprising:
a housing;
a prime mover disposed in the housing;
a guide bar extending from the housing;
a conversion mechanism configured to convert rotational motion of the prime mover to linear motion along a first direction;
a blade configured to move in reciprocating motion relative to the guide bar along the first direction in response to the linear motion of the conversion mechanism and including a plurality of slots extending along the first direction; and
a plurality of guide members each disposed in a corresponding slot of the plurality of slots of the blade and configured to guide the relative reciprocating motion of the blade,
wherein
the plurality of slots comprises:
at least one first slot in which a corresponding guide member of the guide members that is connected to the housing and the guide bar is disposed; and
a plurality of second slots in which a corresponding guide member of the guide members that is connected to the guide bar and is not connected to the housing is disposed,

the at least one first slot includes:
a first inner side surface extending along the first direction; and
a second inner side surface extending along the first direction and opposing the first inner side surface in a second direction perpendicular to the first direction,

each of the second slots includes:
a third inner side surface extending along the first direction; and
a fourth inner side surface extending along the first direction and opposing the third inner side surface in the second direction,

the plurality of guide members comprises:
at least one primary guide member, the at least one primary guide member being disposed in the at least one first slot, wherein with respect to the at least one primary guide member, a total value of a shortest distance between the at least one primary guide member and the first inner side surface in the second direction and a shortest distance between the at least one primary guide member and the second inner side surface in the second direction is a first distance; and
a plurality of secondary guide members, each of the secondary guide members being disposed in a corresponding one of the second slots, wherein with respect to one of the plurality of secondary guide members, a total value of a shortest distance between the one of the plurality of secondary guide members and the third inner side surface in the second direction and a shortest distance between the one of the plurality of secondary guide members and the fourth inner side surface in the second direction is a second distance, and

the first distance is smaller than the second distance.

2. The gardening trimmer according to claim 1 , wherein the at least one first slot in which the at least one primary guide member is disposed corresponds to a housingside end of the blade among the plurality of the slots.

3. The gardening trimmer according to claim 1 , wherein with regard to the secondary guide member different from the one of the plurality of second guide members, a total value of a shortest distance between the different secondary guide member and the third inner side surface in the second direction and a shortest distance between the different secondary guide member and the fourth inner side surface in the second direction is the first distance.

4. The gardening trimmer according to claim 1 , wherein the prime mover is an electric motor.

5. The gardening trimmer according to claim 4 , further comprising a rechargeable battery pack configured to be detachably attached to the housing and configured to supply electric power to the electric motor.

6. The gardening trimmer according to claim 1 , further comprising a grip disposed on the housing and configured to be gripped by a user.

7. The gardening trimmer according to claim 1 , the at least one first slot is at least two first slots, the plurality of guide members comprises at least one different primary guide member disposed in one of the at least two first slots so that the at least one different primary guide member is in contact with the first inner side surface and the second inner side surface.

8. The gardening trimmer according to claim 7 , wherein
the one of the plurality of secondary guide members has a circular cross-sectional shape, and
the at least one different primary guide member has a polygonal cross-sectional shape.

Assignees

• Makita Corp

Inventors

• Kitahara Mikihiro
• Kutsuna Tomoyuki
• Iwamoto Nozomu
• Ota Tomoyuki

Classifications

• A01G3/053 Primary

  motor-driven · CPC title

• A01G2003/0461

  with reciprocating knives · CPC title