Projector

A projector includes a lamp, a fan for dissipating heat generated by the lamp, a housing, a number of blades received in the housing, and a elongated-slider. The housing receives the lamp and the fan, and includes a top cover, a sidewall connected to the top cover, and a bottom cover connected to the sidewall. The top cover defines an through opening therein. The blades can be rotated in cooperation with the slide of the elongated-slider in the through opening. As described above, the projector can exhaust thermal formed by the lamp or electronic elements from the air outlet. At the same time, the flow direction of the air from the air outlet can be changed in cooperation with the slider. Therefore, when a user sits by the air outlet, the user can adjust the flow direction of the air from the air outlet at any time.

RELATED FILED

The present invention relates to a projector, and more particularly, to a projector have a ventilating structure.

BACKGROUND

Referring toFIG. 5, a conventional projector includes a housing20configured for receiving optical elements and electronic components of the projector therein. The housing case20includes a top cover21, a sidewall22connected to the top cover21, and a bottom cover23connected to the sidewall22. The sidewall22includes an air outlet221to ventilate the projector for dissipating heat. Generally, a number of partition bars222are fixed, and airflow direction from the projector cannot be adjusted. As a result, hot air exhausted from the projector via the air outlet221may blow towards user near the air outlet221.

It is desired to provide a projector having a ventilating structure which can overcome the above-described deficiencies.

SUMMARY

According to the present invention, a projector includes a lamp, a fan for dissipating heat generated by the lamp, a housing, a number of blades received in the housing, and a elongated-slider. The housing receiving the lamp and the fan, and includes a top cover, a sidewall connected to the top cover, and a bottom cover connected to the sidewall. The sidewall defines an air outlet therein, the top cover defines an through opening therein, and the bottom cover defines a number of holes therein. The blades are disposed between the top cover and the bottom cover. Each of the blades includes a body, a first shaft extends from a bottom side of the body into the respective holes, and a second shaft extends a top side of the body into the opening. An axis of the first shaft is not alighted with that of the second shaft. The second shaft is slidable in the through opening and the first shaft is allowed to rotate in the respective holes along with the slide of the second shaft. The slider covers the open of the top cover and includes a number of guide slots configured for receiving the second shaft respectively. The elongated-slider actuates the second shaft to slide on the through opening.

Other novel features and advantages will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

A detailed explanation of a projector according to each of various embodiments of the present invention will now be made with reference to the drawings attached hereto.

Referring toFIGS. 1-4, a projector10according to the present embodiment is shown. The projector10can be one of a liquid crystal display (LCD) projector, a digital light processing (DLP) projector and a liquid crystal on silicon (LCOS) projector. In the present embodiment, the projector10is a DLP projector presented only as an example to explain configurations and working principles of the projector10. The projector10includes a lamp20, a fan21for dissipating heat generated by the lamp20, a housing11, four blades122received in the housing11, a elongated-slider121, an image engine14, and a projecting lens15.

The lamp20can be is configured for providing light beams for the projector and can be a halogen lamp, a metal halogen lamp, a light emitting diode (LED), and the like. In the present embodiment, the light source111is a halogen lamp. It should be noted that a quantity of heat is generated by the lamp20during the lamp20works. The fan21faces toward the lamp20for increasing dissipation of the heat generated by the lamp20. The lamp20and the fan is fixed on the housing11by any conventional methods, such as screws, welding, and the like.

The housing11includes a top cover111, a sidewall112connected to the top cover111, and a bottom cover113connected to the sidewall112. The sidewall112includes an air outlet118. Hot air from the lamp20and the fan21flows out of the air outlet118. The top cover111includes an elongated through opening114near the air outlet118therein. The through opening114can be a round opening or a countersink. In the present embodiment, the through opening114is a countersink and includes an enlarged portion115, and a narrow portion116connected to the enlarged portion115, and a platform117formed between the enlarged portion115and the narrow portion116. In particular, the enlarged portion115is coaxially connected to the narrow portion116. Width of the platform117is determined by a difference between the inner diameters of the enlarged portion115and the narrow portion116. The bottom cover113includes a plurality of holes119corresponding to the second aperture116of the through opening114. The holes119can be through holes or blind holes. In the present embodiment, for aesthetic reasons, the holes119are a blind hole.

Each of The blades122includes a body123, a first shaft/pivot124extending from a bottom side of the body123, and a second shaft/pivot125extending from an opposite side of the body123which the first shaft/pivot124is disposed. A shape of the body123can be circular, rectangular, or the like. However, regardless of shape of the body123, the axis of the first and second shafts124,125are spaced from each other and parallel. In the present embodiment, the body123is a rectangular, and the first and second shafts124,125are respectively disposed on two diagonally opposite corners of the body123. The first shaft124is inserted in one of the holes119of the bottom cover113. A diameter of the second shaft125is less than a width of the narrow portion116of the through opening114to allow the second shaft to slide in the narrow portion116. The width of the elongated-slider121is substantially equal to that of the enlarged portion115so that the elongated-slider121can be received in the enlarged portion115and is positioned at the platform117. A length of the elongated-slider121is less than that of the first aperture115so that the elongated-slider121can slide in the enlarged portion115. It can be understood that when the through opening114can be a round opening, the elongated-slider121can directly cover the through opening114.

The elongated-slider121includes a plurality of guide slots126configured for receiving the second shafts125. A length of the guide slots126along the sliding direction of the second shafts125is greater than the diameter of the second shafts125so that the second shafts125can slide along the respective guide slots126. When the elongated-slider121slides along the first aperture116, the body123of the blade122can rotate round the first shafts124. Thus, the flow direction of the air from the air outlet119can be changed. It can be understood that the increase of the length of slide slots126along the slide direction of the second shafts125can increase the rotation angle of the blades122as the rotation angle of the blades122is determined by the length of the slide slots126.

The image engine14is positioned to receive light output from the lamp20and is configured for superimposing spatial information on the light to form image. In the DLP projector, a digital micro-mirror device (not shown) is employ to superimpose spatial information.

The projecting lens15is configured for receiving the light output of the image engine14and magnifying and projecting an image formed by the light emitted from the image engine14on a screen (not shown).

As described above, the projector can disperse heat formed by the lamp20from the air outlet118. At the same time, the flow direction of the air from the air outlet118can be changed in cooperation with the elongated-slider121of the ventilating structure12. Therefore, when a user sits by the air outlet118, the user can adjust the flow direction of the air from the air outlet118at any time.

It should be understood that the above-described embodiment are intended to illustrate rather than limit the invention. Variations may be made to the embodiments without departing from the spirit of the invention. Accordingly, it is appropriate that the appended claims be construed broadly and in a manner consistent with the scope of the invention.