Annular surgical retractor
An annular surgical retractor has a base panel, a driving panel, and multiple expanding elements. Each of the expanding elements has a transmission panel and a supporting rod formed on an inner end of the transmission panel and is bent relative to the transmission panel. By driving the driving panel to rotate relative to the base panel, each of the expanding elements is driven to move between a retracting position and an expanding position. When in the retracting position, the supporting rods abut on each other to form a column. When moved to the expanding position, distances between the supporting rods are enlarged and an area surrounded by the supporting rods is expanded. The annular surgical retractor is used to open a small incision. A depth of the supporting rods inserted into the incision and the area surrounded by the supporting rods can be adjusted according to surgical needs.
1 . An annular surgical retractor comprising:
a base panel including
a stationary annular plate having
a through hole formed through the stationary annular plate; and
multiple guiding portions disposed on an inner side surface of the stationary annular plate and sequentially arranged around the through hole of the stationary annular plate; each of the guiding portions being elongated and having a retracting end positioned toward an inner annular edge of the stationary annular plate and an expanding end positioned toward an outer annular edge of the stationary annular plate; the retracting end of the guiding portion and the expanding end of the guiding portion located at different radial extension lines of the stationary annular plate; and
a stationary handle securely attached to the outer annular edge of the stationary annular plate;
a driving panel including
a movable annular plate having
a through hole formed through the movable annular plate;
an inner side surface facing toward the inner side surface of the stationary annular plate; and
multiple driving portions disposed on the inner side surface of the movable annular plate and arranged around the through hole of the movable annular plate; and
a movable handle securely attached to an outer annular edge of the movable annular plate; and
multiple expanding elements disposed between the base panel and the driving panel and arranged annularly, each of the expanding elements having
a transmission panel disposed between the stationary annular plate and the movable annular plate, and having
a first side surface facing toward the stationary annular plate;
a second side surface facing toward the movable annular plate;
an inner end disposed between the through hole of the stationary annular plate and the through hole of the movable annular plate;
an outer end disposed between the stationary annular plate and the movable annular plate;
a sliding portion disposed on the first side surface of the transmission panel, wherein the sliding portions of the transmission panels of the expanding elements are movably mounted with the guiding portions of the stationary annular plates to allow each of the sliding portions to move along a respective one of the guiding portions; and
a transmission portion disposed on the second side surface of the transmission panel, the transmission portion having a retracting end positioned toward the outer annular edge of the movable annular plate and an expanding end positioned toward an inner annular edge of the movable annular plate, wherein the transmission portions of the transmission panels of the expanding elements are movably mounted with the driving portions of the movable annular plate to allow each of the driving portions to move along a respective one of the transmission portions; and
a supporting rod formed on the inner end of the transmission panel, being bent relative to the transmission panel, and protruding outward from the through hole of the stationary annular plate;
wherein the expanding elements are driven by the driving panel to move back and forth between a retracting position and an expanding position;
wherein when each of the expanding elements is located at the retracting position, each of the driving portions of the movable annular plate is located at the retracting end of the transmission portion of a respective one of the expanding elements, the sliding portion of each of the expanding elements is located at the retracting end of a respective one of the guiding portions of the stationary annular plate, and the supporting rods of the expanding elements abut on each other side by side to form a column;
wherein when each of the expanding elements is moved to the expanding position, each of the driving portions of the movable annular plate is moved to the expanding end of the transmission portion of a respective one of the expanding elements, the sliding portion of each of the expanding elements is moved to the expanding end of the respective one the guiding portions of the stationary annular plate, and the supporting rods of the expanding elements are separately arranged annularly.
2 . The annular surgical retractor as claimed in claim 1 , further comprising at least one compact camera module mounted on the supporting rod of at least one of the expanding elements.
3 . The annular surgical retractor as claimed in claim 2 , wherein the at least one compact camera module includes two compact camera modules mounted on two of the supporting rods that are disposed opposite to each other.
4 . The annular surgical retractor as claimed in claim 2 , further comprising an elastic sleeve mounted around the supporting rods of the expanding elements.
5 . The annular surgical retractor as claimed in claim 2 , wherein an included angle between the supporting rod and the transmission panel is defined between 90 degrees to 100 degrees.
6 . The annular surgical retractor as claimed in claim 1 , further comprising an elastic sleeve mounted around the supporting rods of the expanding elements.
7 . The annular surgical retractor as claimed in claim 6 , wherein an included angle between the supporting rod and the transmission panel is defined between 90 degrees to 100 degrees.
8 . The annular surgical retractor as claimed in claim 1 , wherein an included angle between the supporting rod and the transmission panel is defined between 90 degrees to 100 degrees.
9 . The annular surgical retractor as claimed in claim 1 , wherein
the movable annular plate of the driving panel further has multiple limiting guide slots separately arranged along the outer annular edge of the movable annular plate, each of the limiting guide slots formed as an arc-shaped elongated hole and extending along the outer annular edge of the movable annular plate; and
the stationary annular plate of the base panel further has multiple limiting protrusions disposed on the inner side surface of the stationary annular plate, separately arranged along the outer annular edge of the stationary annular plate, and slidably protrude in the limiting guide slots 212 respectively.
10 . The annular surgical retractor as claimed in claim 9 , wherein the limiting protrusions are detachably mounted on the inner side surface of the stationary annular plate.
11 . The annular surgical retractor as claimed in claim 1 , wherein
each of the guiding portions of the stationary annular plate is formed as an elongated guiding groove; and
the sliding portion of each of the expanding elements is formed as a protrusion and is mounted in the respective one of the guiding portions.
12 . The annular surgical retractor as claimed in claim 11 , wherein the sliding portion of each of the expanding elements is formed into an elongated protrusion with a length shorter than the guiding portion.
13 . The annular surgical retractor as claimed in claim 11 , wherein
the transmission portion of the transmission panel of each of the expanding elements is formed as an elongated guiding groove; and
each of the driving portions of the movable annular plate is formed as a protrusion and is mounted in the respective one of the transmission portions.
14 . The annular surgical retractor as claimed in claim 1 , wherein
the transmission portion of the transmission panel of each of the expanding elements is formed as an elongated guiding groove; and
each of the driving portions of the movable annular plate is formed as a protrusion and is mounted in the respective one of the transmission portions.
15 . The annular surgical retractor as claimed in claim 1 , wherein
the movable handle further has a mounting hole formed through the movable handle;
a positioning element is mounted in the mounting hole and has at least one positioning tooth;
a curved rack is mounted through the mounting hole of the movable handle and has an end securely connected to the stationary handle;
wherein the at least one positioning tooth of the positioning element resiliently engages with the curved rack.