CN2248369Y

CN2248369Y - Ripple pictures dynamic projecting machine

Info

Publication number: CN2248369Y
Application number: CN 95224693
Authority: CN
Inventors: 王令概; 由锡民; 王旭
Original assignee: YIDA PHOTO-ELECTRIC INSTRUMENT FACTORY CHANGCHUN
Current assignee: YIDA PHOTO-ELECTRIC INSTRUMENT FACTORY CHANGCHUN
Priority date: 1995-11-15
Filing date: 1995-11-15
Publication date: 1997-02-26
Anticipated expiration: 2005-11-15

Abstract

The utility model relates to a ripple picture dynamic projecting machine which belongs to the stationery of scientific and educational instrument class. The ripple is namely the moire (moirefrige). The utility model is composed of a raster, a ripple projection film, a raster guide rail, a projection film guide rail, a motor roller group, a contact point type raster fast return mechanism, etc. The raster is arranged in the guide rail. The ripple projection film is arranged at the upper part of the guide rail. One end of a case is provided with the motor roller group and the raster fast return mechanism. The utility model overcomes the existing defect of a 'line stack type lantern slide automatic demonstrator '. A cam type fast return mechanism is changed to a contact point type fast return mechanism to improve the effect of continuous demonstration. The width of the projection film guide rail is changed to be adjustable. The design and manufacture of the raster has new improvement. The ripple in the ripple projection film adopts a microcomputer and a numerical control plotter to carry out the precise drawing.

Description

Corrugated plate dynamic projection machine

The utility model belongs to science and education instrument class school supply and stationery.It utilizes the moire fringe that folded matrix effect produced (Moire frige, i.e. ripple) of dynamic and static grating, is used with general projectors, realizes having dynamic projected picture, obtains lively, vivid dynamic similation effect.

Corrugated plate is the folded formula transparency of line, though existing corrugated plate dynamic projection machine has certain automatic demo function, but effect is all undesirable, the automatic stream time that has has only three or four minutes, though (be as the patent No. 86204819 " line folded formula lantern slide from movement demonstration instrument ") that has is can long time continuous working, but dazzling periodicity moment counter motion appears in presentation process, influence demonstration effect, and its transparency guide rail width can not change fast, the transparency that size is different just can not be demonstrated with it, and existing ripple transparency dynamic similation is image not enough, true to nature.

The purpose of this utility model is to overcome the deficiency of above-mentioned known technology, thereby a kind of dynamic projection machine satisfactory for result, that be applicable to multiple dimensions transparency of demonstrating is provided.

The purpose of this utility model realizes in the following way:

This projector is by grating (1), ripple transparency (2), grating guide rail (3), transparency guide rail (4), (6) six critical pieces of motor roller set (5) and grating snap back mechanism are formed, wherein: grating (1) is contained among the following guide rail (3), ripple transparency (2) is located at the top of guide rail (4), housing (7) one ends are fixed with motor roller set (5) and grating snap back mechanism (6), motor with roller be pressed on the grating (1), guide rail is by four guide grooves (33), brace (30), width adjustment knob (31) and width adjustment screw (32) are formed, guide groove (33) is fixed on the both sides of transparency guide rail (4), by being bolted on the support plate (8), guide rail links together by brace (30) and width adjustment knob (31), with upper-part all by screw retention on the support plate (8) of bottom.

Slowly at the uniform velocity moving of grating is achieved in that utilizing a slow speed motor to drive a roller slowly rotates, drive grating (1) by the friction force that weight own produced and make linear uniform motion, when grating moves to bottom dead centre by upper dead center, motor roller set (5) is lifted by snap back mechanism (6), under the effect of spring or rubber band, grating (1) the original upper dead center position that rebounds rapidly, the motor roller set falls immediately, grating continues to do slowly at the uniform velocity mobile again, so the dynamic projection machine just can continuously move automatically.

Contact snap back mechanism can be divided into two kinds in mechanical contact snap back mechanism and electric-controlled type contact snap back mechanism again.

Mechanical contact snap back mechanism is at grating at the uniform velocity in the moving process, utilize the position of a latch hook (18) lock out motor roller set (5), when grating moves to bottom dead centre, the lower contact (10) in grating left side promotes unlock lever (20), open latch hook (18), under torsion spring (22) elastic force effect, motor roller set (5) is lifted rapidly, grating (1) resets rapidly, thereby heterodromous image can not occur, when grating resets to upper dead center, the upper contact on grating right side (11) touches the rocking arm (14) of locking, finish the action of locking, the advantage of this mechanical contact snap back mechanism is relatively simple for structure, and cost is cheaper.(referring to accompanying drawing 2)

Electric-controlled type contact snap back mechanism utilizes lower contact (10) to touch lever (23), and depression stroke switch (24) makes electromagnet (25) energising, and by the suction of electromagnet (25), motor roller set (5) is lifted fast, and grating (1) resets rapidly; The back upper contact (11) that resets touches rocking arm (26) and depresses another travel switch (27), electromagnet (25) outage, and motor roller set (5) falls, and grating (1) can continue at the uniform velocity mobile again.This structure need add Pei's vertoro, cost is higher, but owing to use direct current generator instead, can utilize this motor to be easy to the advantage of speed change, regulate the movement velocity of grating (1), to adapt to the needs of the different objects of simulation (as beating of heart), enlarge the function of projector, improve the class of projector.(referring to accompanying drawing 3)

If optoelectronic switch and automatically controlled plate are changed in travel switch (24) and (27), also can save lever (23) and rocking arm (26), further dwindle the volume of electric-controlled type contact snap back mechanism.

The utlity model has following advantage:

Divide the making of coming with transparency guide rail (4) and grating guide rail (3), and, respectively install two guide grooves (33) additional in the both sides of transparency guide rail (4), handle its width by brace (30) with knob (31), according to the width of used transparency, adjust the position of width locating pin (32) in advance.During demonstration, turn knob (31) can be adjusted the width of guide rail (4) rapidly, saves the demonstration time.

The quality of grating (1) directly influences the dynamic similation effect of dynamic projection machine, the photoetching raster density that the utility model adopts is 20～30 every centimetre, the black and white strip ratio was less than 1: 2, and grating direction of motion is changed into from left to right mobile from top to bottom, change like this, can increase the analog functuion of transparency.Because when dynamic and static grating width is identical, the variation of moire fringe (being ripple) is fairly obvious, utilizes this characteristics, can make the transparency that analog gas speed and density change simultaneously, thereby expands the simulation context of transparency to the gas dynamics field.

The utility model has also improved the lenticular lenses frame, and is two-layer about being changed into by individual layer, makes its longer service life, also more attractive in appearance.

Striped (quiet grating) on the existing ripple transparency (2) is cliped and pasted by manual drawing or with corrugated paper and is formed, the dynamic similation teaching equation that the utility model adopts the deviser to derive, drive digital control drawing instrument accurate Drawing with microcomputer, the demonstration effect is more vivid, true to nature.

The utility model will be further described below in conjunction with accompanying drawing:

Fig. 1 is the general structure of corrugated plate dynamic projection machine, and the utility model is made up of grating (being corrugated plate) (1), ripple transparency (line is folded the formula transparency) (2), light a very short time guide rail (3), adjustable transparency guide rail (4), motor roller set (5), grating snap back mechanism (6), housing (7) and support plate parts such as (8).Grating (1) is contained among the following guide rail (3), and the guide rail (4) of ripple transparency (2) up, so that finish stack, rotation and the pull action of transparency, grating (1) is driven by motor roller set (5) and makes linear uniform motion, arrive after bottom dead center, make its arrival upper dead center that resets rapidly, continue to do uniform motion by snap back mechanism (6), motor roller set (5) and grating snap back mechanism (6) are contained in the housing (7), and all parts support by support plate (8).

Fig. 2 is the structural drawing of mechanical contact snap back mechanism, the continuous motion of grating (1) is achieved in that motor roller set (5) though to drive grating (1) at the uniform velocity mobile, but the limited length of grating, just can finish linear reciprocating motion by contact snap back mechanism, when grating (1) moves to bottom dead centre, the lower contact (10) in grating left side promotes unlock lever (20) and counterclockwise rotates, the projection of lever right-hand member withdraws from the locked groove (17) on the latch hook (18), under the effect of torsion spring (22), bottom plate (16) upwards lifts, the mounting plate (15) that drives supporting motor roller set (5) together lifts, roller and lenticular lenses frame disengage, grating resets rapidly under the effect of back-moving spring (9) or rubber band, when arriving upper dead center, the upper contact (11) on lenticular lenses frame right side is by the impulse force in when motion, the impulsion rocking arm (14) of locking is made clockwise direction and is rotated, press down the extension arm (13) of bottom plate (16), unlock lever (20) is moved down, until the locked groove (17) that enters on the latch hook (18), finish the action of locking, mounting plate this moment (15) is also followed the whereabouts, and roller and lenticular lenses frame recover original contact condition, and grating (1) continues to do uniform motion.Latch hook (18) resets by torsion spring (19) and (12) respectively with the rocking arm (14) of locking.Mounting plate (15) is connected with support plate (8) by hinge key (21) with bottom plate (16).

Fig. 3 is the structural drawing of electric-controlled type contact snap back mechanism, when grating (1) when moving to bottom dead centre, lower contact (10) promotes lever (23) and counterclockwise rotates, touch travel switch (24), connect the circuit of electromagnet (25), electromagnet (25) inhales the lever (28) on it, on carry supporting plate (16) off, motor roller set (5) is lifted on and then, grating resets rapidly, when grating (1) resets to upper dead center, upper contact (11) touches rocking arm (26) and presses down travel switch (27), makes electromagnet (25) outage, and motor roller set (5) falls, grating (1) continues to do uniform motion, and rotating speed of motor is regulated by speed governing knob (29).

Fig. 4 is the structural drawing of adjustable transparency guide rail, this structure is made up of 4 guide grooves (33), brace (30), width adjustment knob (31) and width adjustment screw (32) etc., guide groove (33) is fixed on the both sides of transparency guide rail (4), by being bolted on the support plate (8), guide rail links together by brace (30) and guide rail width adjustment knob (31), turning knob, guide rail can dwindle or increase width, and the width size limits by the position of adjusting screw (32).

Claims

1. corrugated plate dynamic projection machine, by grating (1), ripple transparency (2), grating guide rail (3), transparency guide rail (4), (6) six critical pieces of motor roller set (5) and grating snap back mechanism are formed, it is characterized in that: grating (1) is contained among the following guide rail (3), ripple transparency (2) is located at the top of guide rail (4), housing (7) one ends are fixed with motor roller set (5) and grating snap back mechanism (6), motor with roller be pressed on the grating (1), guide rail is by four guide grooves (33), brace (30), width adjustment knob (31) and width adjustment screw (32) are formed, guide groove (33) is fixed on the both sides of transparency guide rail (4), by being bolted on the support plate (8), guide rail links together by brace (30) and width adjustment knob (31), with upper-part all by screw retention on the support plate (8) of bottom.