Sewing machine frame having reinforced structure and sewing machine provided with the frame

A sewing machine frame for use in a sewing machine comprising:

• an outer panel wall constituting a front wall and a rear wall, the outer panel wall having a peripheral edge;
• a side wall protruding from the peripheral edge to provide a closed space with the outer panel wall and being formed integrally with the outer panel wall with a synthetic resin, a combination of the outer panel wall and the side wall providing a bed portion, a tower portion upstanding from the bed portion, and an arm portion extending from the tower portion and positioned above the bed portion, the side wall having a part providing a concaved peripheral wall which defines a stitch working space surrounded by the bed portion, the tower portion and the arm portion;
• a peripheral wall reinforcing rib protruding from the outer panel wall and extending along the peripheral wall, the peripheral wall reinforcing rib ranging at least from a boundary between the bed portion and the tower portion to a boundary between the tower portion and the arm portion;
• and
• an outer panel wall reinforcing rib protruding from the outer panel wall for reinforcing the same.

A sewing machine frame including a bed portion, a tower portion upstanding from the bed portion, and an arm portion extending from the tower portion in a cantilevered fashion, a stitch forming mechanism of the sewing machine being assembled in the sewing machine frame;

• the sewing machine frame comprising:
• an integral main frame body made from a synthetic resin and to which the stitch forming mechanism is assembled, the integral main frame body comprising a back panel wall having a first peripheral edge, and a first side wall integrally protruding from the first peripheral edge, the integral main frame body providing an arm section, a tower section and a bed section;
• an integral frame cover made from a synthetic resin and attached to the main frame body, the integral frame cover comprising a front panel wall having a second peripheral edge, and a second side wall integrally protruding from the second peripheral edge for providing a complementary bed section to form the bed portion with the bed section, a complementary tower section to form the tower portion with the bed section, and a complementary arm section to form the arm portion with the arm section, the first side wall and the second side wall having parts defining a concave wall surroundingly provided by the combination of the arm portion, the tower portion, and the bed portion;
• and
• a concave wall reinforcing rib extending along the concave wall and ranging at least from a boundary between the bed portion and the tower portion to a boundary between the tower portion and the arm portion.

A sewing machine frame for use in a sewing machine comprising:

• an outer panel wall constituting a front wall and a rear wall, the outer panel wall having a peripheral edge;
• a side wall protruding from the peripheral edge to provide a closed space with the outer panel wall and being formed integrally with the outer panel wall with a synthetic resin, a combination of the outer panel wall and the side wall providing a bed portion extending in its longitudinal direction, a tower portion upstanding from the bed portion, and an arm portion extending in its longitudinal direction from the tower portion and positioned above the bed portion, and a congregated area among the bed portion, the tower portion and the arm portion providing a peripheral wall defining a stitch working space of the sewing machine;
• and
• a reinforcing member formed integrally with the outer panel wall and having a hollow cross-section, the reinforcing member being positioned along the peripheral wall and having one end portion positioned in the arm portion and extending in the longitudinal direction thereof, and having another end portion positioned in the bed portion and extending in the longitudinal direction thereof.

A sewing machine frame including a bed portion, a tower portion upstanding from the bed portion, and an arm portion extending from the tower portion in a cantilevered fashion, a stitch forming mechanism of a sewing machine being assembled in the sewing machine frame;

• the sewing machine frame comprising:
• an integral main frame body made from a synthetic resin and to which the stitch forming mechanism is assembled, the integral main frame body comprising a back panel wall having a peripheral edge, and a side wall integrally protruding from the peripheral edge, the integral main frame body providing an arm section, a tower section and a bed section, the side wall having a part defining a peripheral wall surroundingly provided by the combination of the arm section, the tower section and the bed section;
• an integral frame cover serving as a front panel wall made from a synthetic resin and attached to the main frame body for providing a complementary bed section to form the bed portion with the bed section, a complementary tower section to form the tower portion with the tower section, and a complementary arm section to form the arm portion with the arm section;
• and
• a reinforcing member formed integrally with the main frame body and having a hollow cross-section, the reinforcing member being positioned along the peripheral wall and having one end portion positioned in the arm section and extending in the longitudinal direction thereof, and having another end portion positioned in the bed section and extending in the longitudinal direction thereof.

A sewing machine comprising:

• a stitch forming mechanism;
• and
• a sewing machine frame comprising
• a frame member formed of a synthetic resin and having a bed portion, a tower portion upstanding from the bed portion, and an arm portion extending from the tower portion at a position above the bed portion, the bed portion, the tower portion and the arm portion being formed integrally and providing a peripheral wall defining a stitch working space surrounded by the bed portion, the tower portion and the arm portion;
• and
• a peripheral wall reinforcing rib protruding from the frame member, the peripheral wall reinforcing rib extending along the peripheral wall and ranging at least from a boundary between the bed portion and the tower portion to a boundary between the tower portion and the arm portion.

A sewing machine comprising:

• a stitch forming mechanism;
• and
• a sewing machine frame comprising
• an outer panel wall constituting a front wall and a rear wall, the outer panel wall having a peripheral edge;
• a side wall protruding from the peripheral edge to provide a closed space with the outer panel wall and being formed integrally with the outer panel wall with a synthetic resin, a combination of the outer panel wall and the side wall providing a bed portion, a tower portion upstanding from the bed portion, and an arm portion extending from the tower portion and positioned above the bed portion, the side wall having a part providing a peripheral wall at a congregated area among the bed portion, the tower portion and the arm portion for defining a stitch working space surrounded by the bed portion, the tower portion and the arm portion;
• a peripheral wall reinforcing rib protruding from the outer panel wall and extending along the peripheral wall, the peripheral wall reinforcing rib ranging at least from a boundary between the bed portion and the tower portion to a boundary between the tower portion and the arm portion;
• and
• an outer panel wall reinforcing rib protruding from the outer panel wall for reinforcing the same.

A sewing machine comprising

• a stitch forming mechanism;
• and
• a sewing machine frame including a bed portion, a tower portion upstanding from the bed portion, and an arm portion extending from the tower portion in a cantilevered fashion, the stitch forming mechanism being assembled in the sewing machine frame;
• the sewing machine frame comprising:
• an integral main frame body made from a synthetic resin and to which the stitch forming mechanism is assembled, the integral main frame body comprising a back panel wall having a first peripheral edge, and a first side wall integrally protruding from the first peripheral edge, the integral main frame body providing an arm section, a tower section and a bed section;
• an integral frame cover made from a synthetic resin and attached to the main frame body, the integral frame cover comprising a front panel wall having a second peripheral edge, and a second side wall integrally protruding from the second peripheral edge for providing a complementary bed section to form the bed portion with the bed section, a complementary tower section to form the tower portion with the bed section, and a complementary arm section to form the arm portion with the arm section, the first side wall and the second side wall having parts defining a concave wall surroundingly provided by the combination of the arm portion, the tower portion, and the bed portion;
• and
• a concave wall reinforcing rib extending along the concave wall and ranging at least from a boundary between the bed portion and the tower portion to a boundary between the tower portion and the arm portion.

A sewing machine comprising:

• a stitch forming mechanism;
• and
• a sewing machine frame comprising:
• an outer panel wall constituting a front wall and a rear wall, the outer panel wall having a peripheral edge;
• a side wall protruding from the peripheral edge to provide a closed space with the outer panel wall and being formed integrally with the outer panel wall with a synthetic resin, a combination of the outer panel wall and the side wall providing a bed portion extending in its longitudinal direction, a tower portion upstanding from the bed portion, and an arm portion extending in its longitudinal direction from the tower portion and positioned above the bed portion, and a congregated area among the bed portion, the tower portion and the arm portion providing a peripheral wall defining a stitch working space;
• and
• a reinforcing member formed integrally with the outer panel wall and having a hollow cross-section, the reinforcing member being positioned along the peripheral wall and having one end portion positioned in the arm portion and extending in the longitudinal direction thereof, and having another end portion positioned in the bed portion and extending in the longitudinal direction thereof.

A sewing machine comprising:

• a stitch forming mechanism;
• and
• a sewing machine frame including a bed portion, a tower portion upstanding from the bed portion, and an arm portion extending from the tower portion in a cantilevered fashion, the stitch forming mechanism being assembled in the sewing machine frame;
• the sewing machine frame comprising:
• an integral main frame body made from a synthetic resin and to which the stitch forming mechanism is assembled, the integral main frame body comprising a back panel wall having a peripheral edge, and a side wall integrally protruding from the peripheral edge, the integral main frame body providing an arm section, a tower section and a bed section, the side wall having a part defining a peripheral wall surroundingly provided by the combination of the arm section, the tower section and the bed section;
• an integral frame cover serving as a front panel wall made from a synthetic resin and attached to the main frame body for providing a complementary bed section to form the bed portion with the bed section, a complementary tower section to form the tower portion with the tower section, and a complementary arm section to form the arm portion with the arm section;
• and
• a reinforcing member formed integrally with the main frame body and having a hollow cross-section, the reinforcing member being positioned along the peripheral wall and having one end portion positioned in the arm section and extending in the longitudinal direction thereof, and having another end portion positioned in the bed section and extending in the longitudinal direction thereof.