Sensor holder and sensor housing unit

1. A sensor holder, comprising:

a holder body that accommodates a sensor;

a first snap fit that presses the sensor from a rear surface of the sensor;

two second snap fits that fix the holder body to a housing at at least two points; and

a third snap fit that directly restricts movement of the sensor in a direction in which the second snap fits are arranged, while the sensor is accommodated in the holder body,

wherein the first snap fit is disposed between the two second snap fits,

wherein the sensor is in contact with the first snap fit and the third snap fit in a state where the sensor is accommodated in the holder body and the holder body is not fixed to the housing,

wherein, when the second snap fits fix the holder body to the housing, the sensor is spaced apart from the third snap fit.

2. The sensor holder according to claim 1 ,

wherein, when the holder body is viewed from the sensor, the first snap fit, the second snap fits, and the third snap fit are located to overlap with the sensor in a specific direction.

3. The sensor holder according to claim 2 ,

wherein the first snap fit, the second snap fits, and the third snap fit are arranged in a straight line.

4. The sensor holder according to claim 1 ,

wherein the sensor is long in a first direction, and

wherein the holder body includes

an elliptic first hole long in a longitudinal direction of the sensor, and

a circular second hole located further from the second snap fits than the first hole.

5. The sensor holder according to claim 4 ,

wherein the second hole is deeper than the first hole.

6. The sensor holder according to claim 1 ,

wherein the sensor is long in a first direction, and

wherein the first snap fit includes a support portion extending in a longitudinal direction of the sensor.

7. The sensor holder according to claim 1 , further comprising:

a guide member that guides a wire harness extending from the sensor.

8. The sensor holder according to claim 7 ,

wherein the guide member is located, in a direction perpendicular to a longitudinal direction of the sensor, closer to the first snap fit than an opposite surface of the sensor, the opposite surface being opposite to the rear surface of the sensor.

9. The sensor holder according to claim 1 , further comprising:

a guide member that is disposed at one of ends of the holder body to guide a wire harness extending from the sensor, the end being further when viewed from the third snap fit than the other end.

10. The sensor holder according to claim 1 , wherein the first snap fit has a curved tip end.

11. A sensor housing unit, comprising:

the sensor holder according to claim 1 ; and

the housing including a first protrusion and a second protrusion, the first protrusion including a flat portion engaged with a first one of the second snap fits and forming a fulcrum used to attach a second one of the second snap fits, the second protrusion including a lug engaged with the second one of the second snap fits.

12. The sensor housing unit according to claim 11 ,

wherein, when the sensor is viewed from a surface over which the sensor and the housing are in contact with each other, the second protrusion is located higher than the first protrusion with respect to the surface over which the sensor and the housing are in contact with each other.

13. The sensor housing unit according to claim 12 ,

wherein the second one of the second snap fits is longer than the first one of the second snap fits.

14. The sensor housing unit according to claim 11 ,

wherein the housing includes a first boss that fixes positions of the sensor holder and the housing, and

wherein the first boss is located closer to the first protrusion than to the second protrusion.

15. The sensor housing unit according to claim 14 ,

wherein the housing includes a second boss that fixes positions of the sensor and the housing, and

wherein the first boss is higher than the second boss with respect to a surface over which the sensor and the housing are in contact with each other.

16. The sensor housing unit according to claim 11 ,

wherein the flat portion is longer than the lug.