Centrifuge having a lock mechanism
According to an aspect of the present invention, there is provided a centrifuge including: a rotor rotated by a driver; a chamber housing the rotor therein; a cover openable and closable with respect to the chamber; and a lock mechanism that locks the cover in a closed state, wherein the lock mechanism includes: a motor; a first hook rotated by the motor; and a second hook connected to the first hook through a connecting member, wherein the cover includes a securing portion on which the first hook and the second hook are respectively secured when the cover is locked, and wherein, during a locking operation of the cover, primary the first hook is engaged with the securing portion and pulls the cover toward the chamber, and then the second hook is engaged with the securing portion.
1. A centrifuge comprising:
a rotor that holds a sample therein;
a drive device that drives the rotor to rotate;
a chamber that houses the rotor therein and is disposed in a main body;
a cover that is opened and closed with respect to the chamber; and
a lock mechanism that locks the cover in a closed state,
wherein the lock mechanism includes:
a motor;
a first hook mounted on the main body and driven to rotate by the motor;
a second hook spaced from the first hook and mounted on the main body;
a connecting member for connecting the first hook with the second hook so that the second hook is rotated according to a rotation of the first hook; and
a pair of hook catchers mounted on the cover to engage with the first hook and the second hook respectively to lock the cover in the closed state, the first hook being provided with a curved portion which is different from a shape of the second hook so that the first hook is engaged with one of the catchers first and then the second hook is engaged with the other of the catchers.
2. The centrifuge according to claim 1 , wherein the hook catchers are provided with holes to be engaged with the first hook and the second hook respectively, and
wherein the first hook is engaged with the one of the holes to pull the cover toward the chamber so that the second hook can be engaged with the other hole.
3. The centrifuge according to claim 2 , wherein the first hook includes a first portion and a second portion to be engaged with the one of the holes, the first portion being formed in an arc shape and a second portion being continuously formed with the first portion and formed in a linear shape, and
wherein the second hook includes a third portion to be engaged with the other hole and being formed in a linear shape.
4. The centrifuge according to claim 3 , wherein a distance between a rotating center of the first hook and a point on the first portion of the first hook is set to L 2 , and a distance between the rotating center and a point on the second portion of the first hook is set to L 1 , and
wherein L 2 is set larger than L 1 .
5. The centrifuge according to claim 4 , wherein an engagement surface of the first hook is continuously formed so that a distance between the rotating center and the engagement surface gradually decreases from L 2 to L 1 .
6. The centrifuge according to claim 1 , wherein the first hook is engaged with a first catcher to pull the cover toward the chamber at first and then the second hook is engaged with a second catcher when the cover has been pulled.