Lifting and lowering supporting device for projector

Abstract

The elevating leg unit for projector includes one fixing seat fixed to the bottom of projector; one sliding seat set on the fixing seat with one opening, one limit block inside the opening and one pushing part on one side and possessing one bevel; one elevating leg through the opening with several slots on one side and one elastic element on the other side to force the limit block inside the slot; one control part connected to the pushing part and with one inclined part to match the bevel. The present invention makes it possible to regulate the height of projector easily without inclination.

Description

[technical field] [0001] The invention relates to a projector, in particular to a lifting foot device of the projector. [Background technique] [0002] The projector is usually placed on the table, and the projection lens of the projector projects the image and displays it on the screen. However, as the position and size of the screen are different, the height of the projector needs to be adjusted through the adjustment mechanism to use it. The image is projected at the appropriate position on the screen. [0003] Please refer to FIG. 1 , the conventional projector 1 adjustment mechanism is to screw screw 11 on both sides of the projector 1 to support the projector 1 on the desktop 2, and use the rotating screw 11 to change the height of the projector 1, so that The projection lens 12 can project an image on a screen (not shown in the figure), however, the projector 1 is only raised and lowered by one pitch by rotating the screw 11 one turn, so that the user has to rotate m...

AI Technical Summary

Problems solved by technology

[0003] Please refer to FIG. 1 , the conventional projector 1 adjustment mechanism is to screw screw 11 on both sides of the projector 1 to support the projector 1 on the desktop 2, and use the rotating screw 11 to change the height of the projector 1, so that The projection lens 12 can project an image on a screen (not shown in the figure), however, the projector 1 is only raised and lowered by one pitch by rotating the screw 11 one turn, so that the user has to rotate many turns to raise and lower the projector 1 a little. The adjustment speed is quite slow, and it takes a lot of time to adjust to the predetermined height; in addition, the screw 11 loads the weight of the projector 1 to cause frictional resistance between the screw 11 and the desktop 2, so when the user applies force to rotate the screw 11, Need to overcome the friction before turning, resulting in quite laborious adjustment

[0004] Please refer to FIG. 2A and FIG. 2B , which are a perspective view and an upper sectional view of another conventional projector adjustment mechanism 13. The adjustment button 131 is arranged on the side of the lifting foot 132 and connected with the clamping portion 133 as a whole. One end of the clamping part 133 is provided with a clamping flange 1331, which can be engaged with the positioning tooth 1321 on the lifting foot 132, and an elastic element 135 is provided between the other end of the clamping part 133 and the body 134, so when the adjustment button 131 is pressed, The button 131 drives the clamping part 133 to shrink inwardly towards the main body 134, so that the flange 1331 is disengaged from the locking of the positioning teeth 1321, so that the lifting feet 132 can be stretched vertically to adjust the height of the projector. After the adjustment is completed, the button 131 is released. The clamping portion 133 is reset by the elastic element 135 and engaged with the positioning tooth 1321; however, since the button 131 is located on one side of the clamping portion 133, when the pressing position of the button 131 is uneven, the clamping portion 133 will be The elastic element 135 rotates as a fulcrum, which causes the clamping part 133 to be tilted (such as the dotted line), so that the flange 1331 cannot disengage from the positioning tooth 1321 in parallel, and more force is required to make the flange 1331 disengage from the positioning tooth 1321 smoothly. Reach Projector Height Adjustment

In addition, when one hand presses the button 131 backward, the other hand must stabilize and move the projector, which increases the difficulty of adjustment

[0005] Therefore, the height adjustment method of conventional projectors still has the problems of laborious adjustment, slow adjustment speed and easy edge tilting.

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