Sensing device

1 . A sensing device comprising:

a stator including a stator tooth;

a rotor including a magnet; and

a housing,

wherein:

the stator tooth includes a first stator tooth and a second stator tooth disposed inside the first stator tooth;

the sensing device further includes a first sensor and a collector disposed between the first stator tooth and the second stator tooth in the radial direction;

the collector includes a first collector and a second collector;

the first collector and the second collector are disposed to face each other in the radial direction;

the collector and the housing are integrally formed;

each of the first collector and the second collector includes a body disposed to face the first sensor and an extension portion extending from the body; and

the extension portion includes a protrusion protruding from one side edge of the extension portion in an axial direction.

2 . The sensing device of claim 1 ,

wherein the housing includes a groove portion in which the protrusion is disposed.

3 . The sensing device of claim 1 , wherein:

the protrusion includes a first protrusion protruding from the extension portion and a second protrusion extending from the first protrusion; and

a circumferential width of the second protrusion is greater than a circumferential width of the first protrusion.

4 . The sensing device of claim 1 , wherein:

the housing includes a third protrusion;

the third protrusion is disposed to overlap the first collector and the second collector in the axial direction; and

the groove portion is disposed in the third protrusion.

5 . The sensing device of claim 1 ,

wherein the protrusion forms a locking structure with the housing in the axial direction during the process of being integrally formed with the collector and the housing.

6 . The sensing device of claim 3 , wherein the groove portion includes:

a first groove in which the first protrusion is disposed; and

a second groove which extends from the first groove and in which the second protrusion is disposed.

7 . A sensing device comprising:

a stator; and

a rotor disposed in the stator,

wherein the stator includes a stator holder, a stator body coupled to the stator holder, and a stator tooth disposed in the stator body; wherein the stator tooth includes a first stator tooth and a second stator tooth disposed inside the first stator tooth, and the first stator tooth and the second stator tooth are disposed to face each other in the radial direction; and

wherein the first stator tooth, the second stator tooth, and the stator body are integrally formed.

8 . The sensing device of claim 7 , wherein:

the first stator tooth includes a first body and a plurality of first teeth;

the first teeth is disposed to protrude from the first body;

the first body is disposed to overlap the outer portion in the circumferential direction with respect to the center of the stator; and

at least a portion of the first body is disposed to be exposed from the stator body.

9 . The sensing device of claim 7 , wherein:

the second stator tooth includes a second body, and a plurality of second teeth;

the second teeth is disposed to protrude from the second body;

the second body is disposed to overlap the inner portion in the circumferential direction with respect to the center of the stator; and

at least a portion of the second body is disposed to be exposed from the stator body.

10 . The sensing device of claim 7 , wherein:

the stator body includes an outer portion and an inner portion disposed inside the outer portion;

the first stator tooth includes a plurality of first teeth;

the second stator tooth includes a plurality of second teeth;

each of the outer portion and the inner portion includes a plurality of first side portions;

the first side portions are disposed at intervals in the circumferential direction with respect to the center of the stator; and

the first teeth and the second teeth are each disposed between the first side portions in the circumferential direction with respect to the center of the stator to be in contact with the first side portions.

11 . The sensing device of claim 7 ,

wherein the first stator tooth includes a plurality of first teeth and the second stator tooth includes a plurality of second teeth;

wherein the contact surfaces between the sides of the first teeth and the stator body, and between the side of the second teeth and the stator body, are each formed to be inclined so that the first teeth and the second teeth are engaged with the stator body in the axial direction.

12 . The sensing device of claim 10 , wherein:

the stator body includes a plurality of second side portions;

the second side portions are disposed at intervals in the circumferential direction with respect to the center of the stator;

the first stator tooth includes a first body;

the first teeth is disposed to protrude from the first body; and

the first body is in contact with the second side portion.