JPH04355441A - Projector table having adjustor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection stand with an adjustment device for use in movies, liquid crystal projectors, etc.

0002

2. Description of the Related Art Conventionally, when a movie projector is used to project a movie or various materials onto a membrane screen or a liquid crystal screen (not shown) for enlargement, position adjustment means is used to match the screen size of the projector with the screen size. As figure 3
As shown in Figure 2, a foot C' for fine adjustment of the projection angle is attached to the projector A' so as to be movable up and down, an appropriate height adjustment body is inserted between the projector and the projection stand B', or the projection angle fine adjustment foot C' is attached to the projector A'. ' was adjusted by unscientific means by tilting or advancing or retreating. Therefore, it takes time and effort to select a projection stand, adjust its position, and adjust the projection angle of the projector for accurate projection.

0003

[Problems to be Solved by the Invention] The present invention provides quick and easy accurate projection by reducing adjustment time by operating the projection stand on which the projector is placed without operating the projector. The challenge is to be able to adjust the angle.

0004

[Means for Solving the Problems] The present invention is to attach a vertically movable mounting plate to the main body of a projection stand for a projector, and provide recesses for storage that communicate with the main body and the mounting plate. The recess accommodates a male screw rod for lifting and lowering, and an adjusting rotary knob with a female screw hole that is screwed into the male screw rod to raise and lower the male screw rod for lifting, and the rotary adjustment knob is configured to be rotatable from outside the main body. .

[0005]

[Operation] Place the projector on the projection stand with the adjustment device for the projector configured as described above, and turn the adjustment rotary knob at the necessary location so that the screen (not shown) and the screen of the projector match. By moving up and down, the projection stage tilts back and forth, left and right, and the image projected onto the screen moves so that the image of the projector matches the screen image.

[0006]

[Example] Figure 1 shows an example of the projection stand with adjustment device of the present invention.
To explain in detail with reference to FIG. 2, FIG. 1 is a partial vertical cross-sectional view of the mounting plate 1 of the projection stage B in a horizontal state, and FIG.
A partial vertical sectional view showing the operating state of the device is shown. In the figure, 1 is a mounting plate for mounting the projector, 2 is the main body of the projection stand, 3 is the top plate of the main body, 4 is a male screw rod for lifting and lowering, the upper end is a spherical part 4a, and the lower end of the male thread part 5 is loose. It constitutes a flange 6 for stopping. Reference numeral 7 indicates a rotary knob for adjustment with a female threaded hole, and small diameter spherical recesses 1a into which the spherical portions 4a of the male screw rod 4 for lifting are fitted in a plurality of predetermined locations on the mounting plate 1, the main body 2, and the top plate 3. A through hole 3a into which the adjustment rotary knob 7 is fitted and a storage recess 2a having a T-shaped cross section and consisting of a large diameter portion 2a' and a medium diameter portion 2a'' are provided in communication with each other, and the communicating recesses of different diameters are provided. 2a and the through hole 3a are used to raise, lower, and rotate the screw-fitted male screw rod 4 for lifting, the rotary knob 7 for adjustment, and the spherical part 4a, respectively, into predetermined locations. A portion of the adjustment rotary knob 7 is exposed to the outside of the main body 1 to enable external rotational adjustment. Reference numeral 8 uses casters to move the projection table itself back and forth, and from side to side, making it easier to adjust the projection angle.

[0007] The adjustment rotary knob 7 is only rotatable by being hung on the top plate 3 having a small diameter hole 3a. Also,
The adjustment knob 7 and the male screw rod 4 for lifting and lowering screwed into the adjustment knob 7
The main body 2, except for the top plate 3, is stored in the recess 2a in the open state, and the top plate 3 is inserted into and fixed to the male threaded rod 4 for lifting through the through hole 3a, and the placement plate 1 is fixed. The projection table B of the present invention is constructed by fitting into the spherical portion 4a at the upper end of the male screw rod for lifting and lowering.

Since the configuration of the projection stand B of the present invention is as described above, the projector A is placed on the projection stand B, and the adjustment rotary knob 7 on the right in the figure is rotated forward (or backward) to raise and lower it. The mounting plate 1 on which the projector is placed is tilted back and forth (or left and right) by raising the male threaded rod 4 and tilted back and forth (or left and right) to the position 10 shown by the solid line in FIG. Adjust the projection angle of the projector by tilting it to the state shown by the dashed line 11. When the lifting male threaded rod 4 is raised, the flange 6 at its lower end hits the adjusting rotary knob 7, and the lifting is stopped. Since the male threaded lifting rod 4 and the recess 1a of the projector mounting plate 1 are spherical, it is suitable for the mounting plate 1 on which the projector is mounted to tilt smoothly by the vertical movement of the male threaded lifting rod 4. ing.

[0009]

Effects of the Invention The projection table with the adjustment device for a projector of the present invention having the above-described structure and operation has the following features: (1) The adjustment rotary knob facing outside the main body can be adjusted by simply rotating it in the forward and reverse directions. The male screw rod for lifting and lowering screwed into the female screw hole moves up and down, and the mounting plate on which the projector is mounted tilts back and forth or left and right, so that the screen of the projector can be tilted and quickly aligned with the screen screen. (2) Since a portion of the adjustment rotary knob faces outside at the top end of the projection stage, it is much easier to operate compared to the conventional technology in which fine adjustment legs attached to the bottom end of the projector are rotated. Moreover, the adjustment time can be shortened quickly and reliably. (3) Since the mounting plate is tilted by the spherical surfaces of the spherical concave portion and the spherical portion, it is smooth in any direction. (4) The configuration of the adjustment device is simple, consisting of a male threaded lever for lifting and a screw fitting of a rotary knob for adjustment.
Storage is also highly practical as it can be prevented from slipping out by using the communication portion between the recesses and holes of different diameters.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway vertical cross-sectional view of a projection table with an adjustment device in a stationary state.

FIG. 2 is a partially cutaway longitudinal cross-section showing the operating state of the mounting plate of the projection stand with an adjustment device, indicated by a two-dot chain line.

FIG. 3 is a side view showing the state of use of the conventional example.

[Explanation of symbols]

A. Projector B. Projection stand 1 Placement plate 1a Spherical recess 2 Main body 2a, 2a' concavity 3 Top plate 3a Through hole 4 Male screw rod for lifting 4a Spherical part 6　Trim part 7 Adjustment rotary knob

Claims (1)

[Claims] Claim 1: A male screw rod for lifting and lowering and a rotary knob for adjustment screwed into the rod are respectively housed in a plurality of recesses provided at predetermined locations on the upper end of the projection table main body in a state where they are not removed. Rotation of the adjusting rotary knob, with one part facing outside the main body and the spherical part at the upper end of each male threaded lever for raising and lowering fitting into a spherical recess provided at a predetermined location on the bottom of the mounting plate, and facing outside the main body. A projection stand with an adjustment device, in which a mounting plate is tilted vertically and horizontally by a lifting male screw rod that is raised and lowered by operation to adjust the projection angle of a projector on the mounting plate.