Slide rail unit

1. A slide rail unit comprising:

an outer rail attachable to a rack;

a middle rail slidably supported by the outer rail along an extending direction of the outer rail, the middle rail comprising a first lock means and a second lock means; and

an inner rail slidably supported by the middle rail along an extending direction of the middle rail, the inner rail configured to hold an object, the inner rail comprising:

a protrusion projecting towards the middle rail on a reverse side of a surface on which the object is held;

a lock mechanism including:

a release member which releases the inner rail from pressing against the middle rail when the inner rail slides in one direction along the extending direction of the middle rail; and

a suppression member which prevents the middle rail from sliding in the one direction, the first lock means pressing the suppression member when the inner rail slides in the one direction,

wherein the second lock means is pressed on the protrusion when the inner rail slides in the one direction.

2. The slide rail unit according to claim 1 , wherein the second lock means comprises a projection piece projecting from a notch opening provided on the middle rail to the outer rail side, and the release member included in the lock mechanism presses the projection piece when the inner rail slides in the one direction to rotate the second lock means around a first shaft which penetrates the middle rail, thereby releasing a press against the second lock means by the protrusion of the inner rail.

3. The slide rail unit according to claim 2 , further comprising a lock adjustment mechanism which adjusts a movement from a first position where the release member and the suppression member are capable of being in contact with the projection piece and the first lock means respectively in response to a predetermined operation to a second position where the release member and the suppression member are not in contact with the projection piece and the first lock means respectively.

4. The slide rail unit according to claim 3 , wherein the lock adjustment mechanism adjusts the release member and the suppression member to move from the second position to the first position when the inner rail is accommodated to a predetermined position.

5. The slide rail unit according to claim 4 , wherein the lock mechanism is a base plate on which the release member and the suppression member are provided, wherein the base plate is configured to be a part of a surface in parallel to or substantially in parallel to a surface of the inner rail on which the object is held and is detachable to the outer rail.

6. A slide rail unit comprising:

an outer rail attachable to a rack;

a middle rail slidably supported by the outer rail along an extending direction of the outer rail, the middle rail comprising a lock means; and

an inner rail slidably supported by the middle rail along an extending direction of the middle rail, the inner rail comprising:

a lock mechanism including:

a release member which releases the inner rail from pressing against the middle rail when the inner rail slides in one direction along the extending direction of the middle rail; and

a suppression member which prevents the middle rail from sliding in the one direction,

wherein the lock means engages with the release member included in the lock mechanism when the inner rail slide in the one direction to pass the position of the lock means, and the engagement prevents the middle rail from sliding the other direction,

and wherein the lock means comprises:

an inside lock member which presses a surface of the inner rail supported by the middle rail and which is provided on a surface of the middle rail in parallel to or substantially parallel to a surface of the inner rail on which the object is held on the side of the object; and

an outside lock member which is rotatably connected with the inside lock member through a second shaft which penetrates the middle rail and which is provided on a reverse side of a surface on which the inside lock member of the middle rail is provided, the inside lock member releases a press against a surface of the inner rail supported by the middle rail when the inner rail slides in one direction to pass the position of the inside lock member, and at the same time the inside lock member rotates by the second shaft, and the outside lock member rotates by the rotation to engage with the release member included in the lock mechanism.

7. A rack comprising a slide rail unit, wherein the slide rail unit comprises:

an outer rail attachable to a rack;

a middle rail slidably supported by the outer rail along an extending direction of the outer rail, the middle rail comprising a first lock means and a second lock means; and

an inner rail slidably supported by the middle rail along an extending direction of the middle rail, the inner rail configured to hold an object, the inner rail comprising:

a protrusion projecting towards the middle rail on a reverse side of a surface on which the object is held;

a lock mechanism including:

a release member which releases the inner rail from pressing against the middle rail when the inner rail slides in one direction along the extending direction of the middle rail; and

a suppression member which prevents the middle rail from sliding in the one direction, the first lock means pressing the suppression member when the inner rail slides in the one direction,

wherein the second lock means is pressed on the protrusion when the inner rail slides in the one direction.