CN2277087Y - Dynamic demonstration projector - Google Patents

Abstract

The utility model relates to a dynamic demonstration projector whose light source adopts a cold light source which is dispersed in four inner side surfaces of a positive quadrangular prism. The lower part of the positive quadrangular prism has a right hand hole and a right hand hole which are used for the demonstration and the operation of the true object by both hands. The reflected light of the true object is reflected to a screen via a convex lens at the upper part and a plane mirror, and then the reflected light becomes an amplified dynamic vivid image. The utility model is suitable for the dynamic teaching or the scientific report of the true object of the large-sized and middle-sized schools.

Description

The dynamic demonstration projector

The utility model belongs to a kind of teaching aid, uses light projection with the various contents of courses of dynamic demonstration.Existing homemade demonstration projector has two big classes, and the one, the transmission-type projector, another kind of is the reflection type projection device.The former is in order to the image of demonstration transparent substance, and the latter is in order to drill formula opaque article image.But their common shortcomings are to demonstrate instant dynamic effect, for example dissect the overall process of toy or rechoning by the abacus.And in the reality teaching, need the dynamic demonstration effect especially.

The purpose of this utility model provides a kind of projector of dynamic operation, and it can improve student's interest, strengthens teaching efficiency effectively.

The utility model is made of following technical proposal: it is by projector case (1), focusing frame (2) on the shell, focusing knob (3), convex lens (4), level crossing (5), compositions such as electric light source, it is characterized in that electric light source adopts cold light source, the fluorescent light (6) that for example adopts trichromatic rare-earth powder luminescent material to make is seen Fig. 1, and it is less that this fluorescent light is installed in a top, on the inwall of the square cone (A) that the bottom is bigger, promptly all be provided with this fluorescent light of making the snake shape on four inwalls, this lamp uses 220 volts of power supplys, and 50 hertz of frequencies, starting voltage are 190～240 volts.Be equipped with two hand holes in the bottom of projector case (1); one is right hand hole (7); one is left hand hole (8); inner edge along each hand hole is shaped on the continuous of cotton or nylon system; resilient " cuff " (9); on the hole in right hand hole shell (10); lower limb respectively is provided with projection (11) and sees Fig. 3; this two projection is installed in respectively on two recessed slideways (12); and this two slideway (12) is positioned on and has 2～3 to connect loose-leaves (14) the two is connected in mutually the junction on inclined-plane between the inclined-plane of a valve (13) and projector case (1); be provided with the viewer (15) of an inclination; this viewer is Middle Palace shape, is provided with a light-filtering glass (16) at its top with the protection eyes.Make up big and down small to rectangular pyramid (17) in projector case (1) bottom, to strengthen reflecting effect, on falling two inclined-planes of rectangular pyramid (17), this has air inlet (18), on two inclined-planes of positive rectangular pyramid (A), have air outlet (19), a motor (20) respectively is installed in air inlet, on this motor shaft fan is installed, plays the effect of cooling so that ventilate in the projector case.In order to strengthen reflecting effect, the inner walls of projector adopts efficient reflectorized material to make, for example in inner walls chromium plating, for when observing clear do not have omit the sphere driving fit mutually of the root of viewer being made in sphere and the projector case, with viewer swing by a small margin in the permission work.The utility model is work like this, the device that to be demonstrated at first, for example abacus is put into projector housing (1) by valve, check the number by left and right sides hand hole, the right-hand man is inserted respectively in the hand hole of the left and right sides, marginal not is looked viewer glass, limit turn knob (3) (seeing Fig. 1,4), so that making reflected light pass through convex lens (4) and level crossing (5) reflexes to and reaches best clear effect (see figure 6) on the screen (21), can stir abacus bead etc. then and carry out dynamic demonstration, during work the mirror body upwards be revolved and will transfer to the optimum position.Wing nut by rotating shaft (22) one ends is fixed.Part among Fig. 1 (23), (24) are used for fixing the usefulness of convex lens, one side of part (24) is fixed with oblique arm (25), it fixes with the slide block (27) that is enclosed within on the column (26), turning knob (3), can make convex lens knee-action focusing part (28) is the extension type joint sealing, in case light leaks outside, part (29) is a light district plate, it is made up of (see figure 5) four blocks of plates, can go up slide at part (30) by chute (dotted line among the figure) and reflex to light district size on the screen (21) with adjustment.Compare with original technology, the utlity model has following advantage:

One, adopt cold light source to throw light on.Can stretch into hand and carry out dynamic demonstration in the projector housing, add that utilizing rotary fan to make the temperature in the housing is 15 ℃～25 ℃, existing product is because of using the common Edison's bulb of thermal light source, so temperature is generally about 80 ℃ in the housing, staff is insupportable therein, can't carry out dynamic demonstration.

Two, existing transmission-type is thrown instrument, and when the projection opaque article, what occur on the screen is by the black profile of reflection, and for example when professor's calligraphy, word, pen, staff all are projected into the black profile, and are static.The utility model is owing to adopted the new type electro source, and the projector hull shape is reasonable, make by throwing and look the high brightness state that is in of thing itself and a similar luminophor, so the projection effect is rather good, the screen image is rather true to nature, give dynamic effect on the spot in person,, do not have the black profile extremely and occur as film.

Three, original episcopic projector, although lifelike image does not have black profile and occurs, it is motionless colour picture.The utility model by comparison, the colour picture that then is.

Four, right hand activity in demonstration makes demonstration uncommitted, and dimmer board is arranged freely, with the control screen intensity.

Five, be the new generation product of projector, will inevitably bring huge advance made to projection teaching, except that can be used for the child impart rudimentary knowledge to beginners in elementary education, as paper folding, rechoning by the abacus, calligraphy, clay sculpture, secondary education such as physical and chemical experiment, biological dissec show that higher education such as on-the-spot teaching, scientific report etc. can both be shaken and be gone up use.Provided embodiment of the present utility model in conjunction with the accompanying drawings:

Fig. 1 is a front view of the present utility model, and the first half is made broken section.

Fig. 2 is that the K of Fig. 1 is to view

Fig. 3 is the F-F cut-open view of Fig. 2

Fig. 4 is the vertical view of the poly-part of focusing

Fig. 5 is the control gear action synoptic diagram of screen light district size

Fig. 6 is the projection theory figure of light, and light source is mapped to the bottom of projector or by on the demonstration thing, is mapped to level crossing through lens and is refracted to the dynamic image that screen (21) becomes amplification.

Claims (3)

1, a kind of dynamic demonstration projector is by projector case (1), focusing frame (2) on the shell, focusing knob (3), convex lens (4), level crossing (5), compositions such as electric light source, its characteristics are: the A. electric light source adopts cold light source, the fluorescent light (6) that for example adopts trichromatic rare-earth powder luminescent material to make, this fluorescent light are installed on the inwall of a up-small and down-big square cone (A), and four inwalls are provided with this fluorescent light of making the snake shape; B. in the bottom of projector case (1), two hand holes are installed, one is right hand hole (7), one is left hand hole (8), be shaped on cotton or nylon system along the inner edge of each hand hole, " cuff " (9), last lower limb at the hole in right hand hole shell (10) respectively is provided with projection (11), this two projection is installed in respectively on two recessed slideways (12), and this two slideway (12) is positioned on the valve (13), has 2～3 to be connected loose-leaf (14) between the inclined-plane of valve (13) and projector case (1); C. at the friendship rib place on two inclined-planes of projector case (1), be provided with the viewer (15) of an inclination, this viewer is Middle Palace shape, is provided with a rule light-filtering glass (16) at its top; D. up big and down small rectangular pyramid (17) is made in projector case (1) bottom, on falling two inclined-planes of rectangular pyramid (17), this has air inlet (18), top, two inclined-planes at positive rectangular pyramid (A) has air outlet (19), E., a motor (20) respectively is installed in air inlet, on this motor shaft fan is installed.

2, dynamic demonstration projector as claimed in claim 1 is characterized in that the inwall of the housing of projector adopts efficient reflectorized material to make.

3, dynamic demonstration projector as claimed in claim 1 is characterized in that the root of viewer adopts sphere driving fit mutually with projector case.

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