Lighting device comprising slidably disposed positioning member

1. A lighting device, comprising:

a housing, including an accommodating space;

a light source module, disposed in the accommodating space;

a light guiding module, configured to receive the light emitted from the light source module, and the light guiding module including at least two light guiding plates; and

a positioning member, slidably disposed in the accommodating space of the housing;

wherein the two light guide plates are configured in the accommodating space of the housing and are coupled to the opposite sides of the positioning member, so that the positioning member supports and positions the two light guide plates.

2. The lighting device as claimed in claim 1 , wherein the accommodating space of the housing has a first passage, a second passage, and an opening;

wherein the second passage is located between the first passage and the opening and communicates with each other, the light source module is disposed in the first passage of the accommodating space, the positioning member is located in the second passage of the accommodating space, and the two light guide plates are extended outside of the opening.

3. The lighting device as claimed in claim 2 , wherein the housing has a first section, a second section, and a third section, the second section is connected between the first section and the third section, and the first section and the second section restrict the movement of the positioning member along the second passage;

wherein the first section surrounds and defines the opening of the accommodating space, the second section surrounds and defines the second passage of the accommodating space, and the third section surrounds and defines the first passage of the accommodating space.

4. The lighting device as claimed in claim 3 , wherein the positioning member further includes at least two first convex portions for abutting against the first section.

5. The lighting device as claimed in claim 4 , wherein the positioning member further includes at least two second convex portions for abutting against the third section.

6. The lighting device as claimed in claim 5 , wherein the first convex portion and the second convex portion are extended in the opposite directions.

7. The lighting device as claimed in claim 1 , wherein the housing is extended along a long axis to form a length and forms a width along a short axis, the short axis and the long axis are perpendicular to each other, the positioning member is formed with two first notches, the two first notches are symmetrical to the short axis, and each of the two light guide plates has a depression portion to be engaged with the corresponding first notch.

8. The lighting device as claimed in claim 7 , wherein the housing forms a height along a central axis, the central axis is perpendicular to the short axis and the long axis, and the dimension of the depression portion along the central axis is greater than a thickness of the positioning member.

9. The lighting device as claimed in claim 7 , wherein the depression portion has an upper surface and a lower surface, the upper surface abuts against a top surface of the positioning member, and the bottom surface of the positioning member does not abut against the lower surface.

10. The lighting device as claimed in claim 7 , wherein the positioning member further includes two first guiding inclined surfaces which guide each of the light guide plates into the corresponding first notch.

11. The lighting device as claimed in claim 1 , wherein the housing is extended along a long axis to form a length and forms a width along a short axis, the short axis and the long axis are perpendicular to each other, the positioning member is formed with two first notches and two second notches, the two second notches communicate with the first notches, each of the two light guide plates has a depression portion to be engaged with the corresponding second notch;

wherein the dimension of the light guide plates along the short axis is greater than the dimension of the first notch along the short axis.

12. The lighting device as claimed in claim 11 , wherein the positioning member further includes two second guiding inclined surfaces, which guide each of the light guide plates into the corresponding second notch.

13. The lighting device as claimed in claim 1 , further includes two fixing elements, and each of the fixing elements pass through the housing and the corresponding light guide plate, so that the light guide plates are fixed to the housing.