CN2133890Y

CN2133890Y - Optoelectric teacher's pointer

Info

Publication number: CN2133890Y
Application number: CN 92234124
Authority: CN
Inventors: 池旭生; 庞大本; 叶德勤; 朱观煦
Original assignee: Basic Theory Inst China Academy Of Tradiational Chinese Medicine
Current assignee: Basic Theory Inst China Academy Of Tradiational Chinese Medicine
Priority date: 1992-09-28
Filing date: 1992-09-28
Publication date: 1993-05-19
Anticipated expiration: 2002-09-28

Abstract

The utility model relates to a photoelectric ferule. The photoelectric ferule indicates the emphasis of pictures and words on a screen by forming a focusing light spot on a projection screen to help a speaker to explain. The utility model comprises a main cylinder and a focusing cylinder arranged on the front end of the main cylinder, wherein, a battery and a bulb are arranged inside the main cylinder, and the front end of the focusing cylinder is fixedly provided with two plane-convex lens. With simple structure and low cost, the utility model is convenient to be carried and used.

Description

Optoelectric teacher's pointer

The utility model relates to a kind of Optoelectric teacher's pointer, belongs to a kind of portable illumination device that is used for indication picture and text emphasis on the projection screen.

People often use magic lantern, projector etc. to carry out teaching demonstration now, and existing a kind of laser pointer on the market is to launch laser with laser illuminator, are producing the emphasis that luminous point comes picture and text on the instruction screen on the projection screen; This device is generally very heavy, and is not portable, and brings a high price.

The purpose of this utility model be to provide a kind of simple in structure, be easy to carry, the Optoelectric teacher's pointer of low cost of manufacture, can on projection screen, form hot spot, with the emphasis of indication picture and text.

The purpose of this utility model reaches as follows:

A kind of Optoelectric teacher's pointer, comprise main tube and be installed in battery, contact chip, lamp socket, bulb in the main tube, on main tube sidewall, be provided with button, it is characterized in that: be provided with focusing drum at main tube front end, the focusing drum front end is installed with two plano-convex lenss that convex surface is all outside, this focusing drum is connected with main tube by screw thread, by the distance between rotation focusing drum adjustment bulb and the plano-convex lens, thereby can on screen, form a hot spot.

The purpose of this utility model can also following mode reach:

Can be provided with an adapter between described main tube and focusing drum, described lamp socket and bulb are arranged on the rear end of this adapter.

Described main tube rear end can be provided with bonnet.

Described bulb is preferably the red light bubble.

Advantage of the present utility model is:

1. as long as the rotation focusing drum can be focused into a hot spot on projection screen, thereby can explain, just use very conveniently, and be easy to carry the picture and text of luminous point indication on the screen.

2. simple in structure, be easy to make, with low cost.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the front view of a kind of preferred embodiment of the utility model.

Fig. 2 is the structure cut-open view of Fig. 1.

Fig. 3 is the right view of Fig. 1.

The utility model will be further described as follows in conjunction with the accompanying drawings: with reference to Fig. 1～Fig. 3, a kind of Optoelectric teacher's pointer comprises focusing drum 1, adapter 2, main tube 3, takes over 2 and is screwed onto main 3 front end, and focusing drum 1 is screwed onto takes over 2 front ends.Focusing drum 1 front end is installed with two adjacent plano-convex lenss 11,12 together, and the convex surface of plano-convex lens 11,12 is provided with lamp socket 4, bulb 5 in adapter 2 rear ends all outward, and bulb 5 can be used red.Be equiped with in main tube 3 to the battery 6 of bulb 5 power supplies and the contact chip 7 of formation current supply circuit, button 8 is located on main tube 3 sidewalls, is provided with bonnet 9 in main tube 3 rear ends, also is arranged with sleeve 61 in battery 6 peripheries, so that the replacing battery.During use, as long as rotation focusing drum 1, the distance between appropriate change bulb 5 and the plano-convex lens 11,12 can focus on formation one hot spot, thereby provide a kind of instrument of indicating the picture and text emphasis on the projection screen for the lecturer on projection screen.

Claims

1, a kind of Optoelectric teacher's pointer, comprise main tube and be installed in battery, contact chip, lamp socket, bulb in the main tube, on main tube sidewall, be provided with button, it is characterized in that: be provided with focusing drum at main tube front end, the focusing drum front end is installed with two plano-convex lenss that convex surface is all outside, and this focusing drum is connected with main tube by screw thread.

2, by the described Optoelectric teacher's pointer of claim 1, it is characterized in that: spiral shell is provided with an adapter between described main tube and focusing drum, and described lamp socket and bulb are arranged on the rear end of this adapter.

3, by claim 1 or 2 described Optoelectric teacher's pointers, it is characterized in that: described main tube rear end is provided with bonnet.

4, by the described Optoelectric teacher's pointer of claim 3, it is characterized in that: described bulb is the red light bubble.