Robot arm mechanism and linear extension and retraction mechanism

A robot arm mechanism comprising a revolute joint and a linear extension and retraction joint, wherein:

• the linear extension and retraction joint includes
• a plurality of first connection pieces coupled together bendably on a bottom plate side and provided with a U-shaped cross section;
• a plurality of second connection pieces coupled together bendably and each shaped like a flat plate, a foremost one of the plurality of second connection pieces being connected with a foremost one of the plurality of first connection pieces, the first and second connection pieces forming a columnar body when overlapped each other, the columnar body being relaxed when the first connection pieces and the second connection pieces are separated from each other;
• an ejection section adapted to form the columnar body by joining together the first and second connection pieces and support the columnar body, and
• a movement section adapted to move the first and second connection pieces in an ejection direction;
• wherein
• a linear gear is formed on a lateral surface of each of the first connection pieces;
• and
• the movement section includes a drive gear engaged with the linear gears of the first connection pieces overlapped to the second connection pieces in the ejection section.

A robot arm mechanism comprising a revolute joint and a linear extension and retraction joint, wherein:

• the linear extension and retraction joint includes
• a plurality of first connection pieces coupled together bendably on a bottom plate side and provided with a U-shaped cross section;
• a plurality of second connection pieces coupled together bendably and each shaped like a flat plate, a foremost one of the plurality of second connection pieces being connected with a foremost one of the plurality of first connection pieces, the first and second connection pieces forming a columnar body when overlapped each other, the columnar body being relaxed when the first connection pieces and the second connection pieces are separated from each other;
• an ejection section adapted to form the columnar body by joining together the first and second connection pieces and support the columnar body, and
• a movement section adapted to move the first and second connection pieces in an ejection direction,
• wherein
• respective linear gears are formed on opposite lateral surfaces of each of the first connection pieces;
• and
• the movement section includes a pair of drive gears engaged with the linear gears of the first connection pieces overlapped to the second connection pieces in the ejection section.

A linear extension and retraction mechanism comprising:

• a plurality of first connection pieces coupled together bendably on a bottom plate side and provided with a U-shaped cross section;
• a plurality of second connection pieces coupled together bendably and each shaped like a flat plate, a foremost one of the plurality of second connection pieces is connected with a foremost one of the plurality of first connection pieces, the first and second connection pieces, when overlapped each other, form a columnar body by being constrained from bending, the columnar body is relaxed when the first connection pieces and the second connection pieces are separated from each other;
• an ejection section adapted to form the columnar body by joining together the first and second connection pieces and support the columnar body;
• and
• a movement section adapted to move the first and second connection pieces in an ejection direction,
• wherein
• a linear gear is formed on a surface of a bottom plate of each of the first connection pieces, and
• the movement section includes a drive gear engaged with the linear gears of the first connection pieces overlapped to the second connection pieces in the ejection section.

A linear extension and retraction mechanism comprising:

• a plurality of first connection pieces coupled together bendably on a bottom plate side and provided with a U-shaped cross section;
• a plurality of second connection pieces coupled together bendably and each shaped like a flat plate, wherein a foremost one of the plurality of second connection pieces being connected with a foremost one of the plurality of first connection pieces, the first and second connection pieces forming a columnar body when overlapped each other, the columnar body being relaxed when the first connection pieces and the second connection pieces are separated from each other;
• an ejection section adapted to form the columnar body by joining together the first and second connection pieces and support the columnar body;
• and
• a movement section adapted to move the first and second connection pieces in an ejection direction,
• wherein
• a linear gear is formed on a lateral surface of each of the first connection pieces, and
• the movement section includes a drive gear engaged with the linear gears of the first connection pieces overlapped to the second connection pieces in the ejection section.

A linear extension and retraction mechanism comprising:

• a plurality of first connection pieces coupled together bendably on a bottom plate side and provided with a U-shaped cross section;
• a plurality of second connection pieces coupled together bendably and each shaped like a flat plate, a foremost one of the plurality of second connection pieces being connected with a foremost one of the plurality of first connection pieces, the first and second connection pieces forming a columnar body when overlapped each other, the columnar body being relaxed when the first connection pieces and the second connection pieces are separated from each other;
• an ejection section adapted to form the columnar body by joining together the first and second connection pieces and support the columnar body;
• and
• a movement section adapted to move the first and second connection pieces in an ejection direction,
• wherein
• respective linear gears are formed on opposite lateral surfaces of each of the first connection pieces, and
• the movement section includes a pair of drive gears engaged with the linear gears of the first connection pieces overlapped to the second connection pieces in the ejection section.