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] see figure 1 As shown, 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 be adjusted. The image is projected on the 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 ...

AI Technical Summary

Problems solved by technology

[0003] see figure 1 As shown, 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 be adjusted. The image is projected on the 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 must rotate many turns before the height of the projector 1 can be slightly raised and adjusted. The 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, the friction must be overcome first. It can be rotated only after the force is applied, which makes the adjustment quite laborious.

[0004] see Figure 2A and Figure 2B As shown, it is a perspective view and an upper cross-sectional view of another conventional projector adjustment mechanism 13. The adjustment button 131 is arranged on the side of the lifting foot 132, and is connected with the clamping part 133 as a whole. One end of the clamping part 133 is provided with The clamping flange 1331 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 Retract inwardly toward the main body 134, so that the flange 1331 is free from the locking of the positioning teeth 1321, so that the lifting feet 132 can be extended and retracted in the vertical direction to adjust the height of the projector. The element 135 resets and engages with the positioning tooth 1321; however, since the button 131 is arranged on one side of the locking part 133, when the pressing position of the pressing button 131 is uneven, the locking part 133 will rotate with the elastic element 135 as a fulcrum, As a result, the clamping part 133 produces a tilting phenomenon (such as the dotted line part), so that the flange 1331 cannot be separated from the positioning teeth 1321 in parallel, and more force must be used to make the flange 1331 successfully disengage from the positioning teeth 1321 to achieve height adjustment of the projector.

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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