CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of China application serial no. 202021106273.1, filed on Jun. 16, 2020. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a portion of this specification.

BACKGROUND

Technical Field

This disclosure relates to a shock absorber and a projection device.

Description of Related Art

Currently, many projectors are disposed with a color wheel and rotate the color wheel to carry out color mixing of the three primary colors of red, blue, and green so as to generate a picture. The color wheel is generally fixed on a frame made of sheet metal by the manner of locking, and then screws are used to lock the frame with the casing of the optical machine. Because the color wheel will generate vibration when it is rotating, the vibration will be transmitted to the casing of the optical machine by the frame. In addition to causing the casing to vibrate which may have an impact on the optical elements accommodated in the casing, it also generates a lot of noise.

The information disclosed in this background section is only for enhancement of understanding of the background of the described technology and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Furthermore, the information disclosed in the background section does not mean that one or more problems to be resolved by one or more embodiments of the disclosure were acknowledged by a person of ordinary skill in the art.

SUMMARY

This disclosure provides a shock absorber, which reduces the probability of vibration being transmitted to a casing, thereby providing shock absorption and noise reduction.

The disclosure provides a projection device with the shock absorber.

The shock absorber of the disclosure includes a first casing, a second casing, a frame, a vibrator, and a buffer element. The first casing includes a first pressing portion. The second casing is detachably fixed to the first casing and includes a second pressing portion. The frame includes a first portion and a second portion, and the first portion is located between the first pressing portion and the second pressing portion. The vibrator is fixed to the second portion of the frame. The buffer element is disposed between the first pressing portion and the first portion of the frame, and between the second pressing portion and the first portion of the frame. The first pressing portion and the second pressing portion press against the buffer element, and sandwich the first portion of the frame.

The projection device of the disclosure includes a first optical machine casing, a second optical machine casing, a frame, a wheel and a buffer element. The first optical machine casing includes a first pressing portion. The second optical machine casing is detachably fixed to the first optical machine casing and includes a second pressing portion. The frame includes a first portion and a second portion, and the first portion is located between the first pressing portion and the second pressing portion. The wheel is fixed to the second portion of the frame. The buffer element is disposed between the first pressing portion and the first portion of the frame, and between the second pressing portion and the first portion of the frame. The first pressing portion and the second pressing portion press against the buffer element, and sandwich the first portion of the frame.

Based on the above, the shock absorber of the disclosure disposes the buffer element between the first pressing portion and the first portion of the frame, and between the second pressing portion and the first portion of the frame, and the first pressing portion of the first casing and the second pressing portion of the second casing press the buffer element to sandwich the first portion of the frame so as to fix the relative positions of the frame, the first casing and the second casing. With the foregoing configuration, the buffer element may provide buffering to the portion between the frame and the first casing, and the portion between the frame and the second casing, so as to provide good shock absorption and noise reduction.

Other objectives, features and advantages of the disclosure can be further understood from the further technological features disclosed by the embodiments of the disclosure wherein there are shown and described preferred embodiments of the disclosure, simply by way of illustration of modes best suited to carry out the disclosure.

