Thread guide threading apparatus and sewing machine provided therewith

A sewing machine comprising:

• a sewing machine head;
• a thread guide provided in a lower part of the sewing machine head;
• and
• a threading apparatus threading the thread guide and comprising:
• a moving member mounted on the sewing machine head so as to be slid;
• a pivot arm pivotally mounted on the moving member so as to be pivoted and so as to slide the moving member when an operating force is applied thereto;
• and
• a hook member pivotally mounted on the moving member and coupled to the pivot arm so as to operated in synchronization with the pivot arm, the hook member having a threading hook, the hook member performing a first rocking operation switching the hook member from a standby position where the threading hook is not threaded to an operating position, based on action of an operating force upon rotation of the pivot arm, the hook member further performing a sliding movement in which the hook member is slid from the operating position together with the pivot arm and the moving member to thread the thread guide and a second rocking operation in which the hook member is rocked to be returned to the standby position after having threaded the thread guide.

A sewing machine comprising:

• a sewing machine head;
• a thread guide provided in a lower part of the sewing machine head;
• and
• a threading apparatus threading the thread guide and comprising:
• an operating force applying member applying an external operating force;
• a hook member moved by the operating force applied to the operating force applying member between a standby position where the threading hook is not threaded and an operating position where the threading hook is allowed to be threaded, the movement of the hook member including a first movement in which the hook member is switched from the standby position to the operating position, a second movement in which the hook member is moved a predetermined distance so that the thread caught on the threading hook by the first movement is moved from the open end of the thread guide to the inner end side of the thread guide, and a third movement in which the hook member is switched from the operating position to the standby position.

A sewing machine comprising:

• a cassette mount;
• a thread cassette accommodating a supply of thread and detachably attached to the cassette mount;
• a needle bar supporting a sewing needle;
• a first thread guide located in a lower portion of the needle bar;
• a threading apparatus for threading the first thread guide, the threading apparatus comprising:
• a hook member having a threading hook and moved between a standby position where a thread drawn from the thread cassette is not caught on the threading hook an operating position where the threading hook is allowed to be threaded, the hook member being switched between the standby position and the operating position thereby to thread the first thread guide;
• and
• an operating force applying member applying an operating force for switching the hook member between the standby position and the operating position from the thread cassette when the thread cassette is attached to the cassette mount.

A sewing machine comprising:

• a needle bar supporting a sewing needle;
• a first thread guide located in a lower portion of the needle bar;
• a second thread guide located away from the first thread guide by a predetermined distance;
• a threading apparatus for threading the first and second thread guides, the threading apparatus comprising:
• a hook member having a threading hook and moved between a standby position where a thread drawn from the thread cassette is not caught on the threading hook an operating position where the threading hook is allowed to be threaded, the hook member being switched between the standby position and the operating position thereby to thread the first and second thread guide;
• and
• an operating force applying member applying an operating force for switching the hook member between the standby position and the operating position from the thread cassette when the thread cassette is attached to the cassette mount.