CN86203796U

CN86203796U - Universal circuit teaching instrument

Info

Publication number: CN86203796U
Application number: CN 86203796
Authority: CN
Inventors: 凌振亚
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-06-12
Filing date: 1986-06-12
Publication date: 1987-06-24

Abstract

The utility model provides a universal circuit teaching instrument which comprises a circuit board, an element block, a node plate and an elastic guide wire unit. The universal circuit teaching instrument is characterized in that the circuit board, the element block and the node plate are connected in the separable fastening fabric form; elements are arranged on the element block, and the standard symbol of the elements is drawn on the element block; the connecting guide wire adopts the elastic guide wire with colors. The universal circuit teaching instrument provided by the utility model not only makes the colors of the assembled circuits bright and the rowed wire regular, and forms the peculiar effect that the circuit diagram, the element symbol and the circuit function are integrated, but also simplifies the assembling and testing work of the circuit and raises work efficiency.

Description

Universal circuit teaching instrument

The utility model belongs to the modelling technique field that electricity in the physics or magnetics are used, and a kind of be custom-designed novel education of course or demonstration equipments such as transistor circuit, Industry Electronics and electronic circuit promptly are provided.

Up to the present, about the demonstration transistor circuit, Industry Electronics and electronic circuit principle instruments used for education be that the electronic circuit demonstration teaching aid has three types: a kind of fixed demonstrator, it is that circuit diagram is drawn on the surface plate, and all elements and lead also all are welded onboard by position correspondingly; Second kind is the plug-in type demonstrator, and as the SXJ type teaching device that Tsing-Hua University produces, it adopts fixed printed circuit board arrangement, is decorated with circuit diagram above, and is equipped with the corresponding elements jack.Each element can be pegged graft on fixing position, with the translation circuit parameter, but the form of circuit then can not change; The third is a brick pattern teaching device, JDJ type teaching device as the production of Ruian, Zhejiang Province electronic instrument industrial group, it is welded in element in the slotting son just as building block, relies on the beryllium-bronze reed to realize electric connection between each slotting son, and each slotting son of plug-in mounting is finished entire circuit in planar disk at last.More than three types electronic circuit demonstration teaching aid all exist very flexible, maintenance capacity is big, provides the chance of exercise few for student oneself connects circuit, the circuit of being demonstrated effect directly perceived is shortcoming such as distinctness inadequately also.

The utility model provides a kind of new teaching aid for the ocular demonstration of electronic circuit, it have need not weld, element do not limit by the locus, can form characteristics such as needed various circuit arbitrarily.Whole general-purpose electric circuit teaching machine is made up of circuit board, member block, node sheet and elastic wire group etc. zero, parts.First technical characterictic of this general-purpose electric circuit teaching machine is exactly to adopt the velcro form to connect between circuit board and member block, the node sheet, promptly on circuit board, stick the velcro negative film, and stick with the corresponding velcro positive of circuit board at the back side (bottom) of member block and node sheet, second technical characterictic of this general-purpose electric circuit teaching machine is that member block can be united component symbol and electric work, thereby obtains good effect directly perceived.Itself is layer structure member block, the upper strata is an insulcrete, its front (being top) is equipped with electronic component and silver-plated binding post, and be decorated with the standard symbol of this element, it is any element that the people is promptly known at a glance, the middle level is a conductive metal sheet, can adopt scale copper to make usually, promptly constitutes series connection by conductive metal sheet between element and the binding post.The node chip architecture is comparatively simple, and the insulating trip that it posts the velcro positive by the bottom constitutes, and insulating trip top is equipped with a short circuit terminal.After the node sheet was placed on the circuit board, its effect was to make elastic wire that bending at any angle takes place, and makes circuit layout more compact and attractive in appearance, to strengthen its effect directly perceived.Another technical characterictic of this general-purpose electric circuit teaching machine is that the elastic wire that adopts two ends to be welded with silver-plated hook is made lead.Effective elongation of elastic wire itself is between 1.2～1.8 times, the elastic wire group that whole teaching machine adopted, its length is pressed index law and is constituted series, it is shorter and approach maximum length behind its wire elongation most than it to be that the length of every lead equals, the elastic wire group of being formed by this length series can the connecting circuit plate on any 2 points, that is to say on the circuit board that point-to-point transmission all can be connected by a suitable elastic wire arbitrarily.

General-purpose electric circuit teaching machine provided by the utility model, its member block is equipped with altogether: elements such as resistance, electric capacity, diode, triode, field effect transistor, unijunction transistor, thyristor, stabilivolt, AC and DC power supply, range transformer, operational amplifier, photodiode, loudspeaker, bulb, pilot lamp.With elastic wire these member block are linked up, can constitute 100 kinds of experiments circuit, comprise Kirchhoff theorem, Dai Weining theorem, differentiating circuit, integrating circuit in the basic circuit; Various basic amplifier circuits in the Analogical Electronics, superheterodyne, mu balanced circuit; Various types of triggers in numeral and the pulsing circuit, oscillator etc.; Various totalizers in the integrated circuit, subtracter, proportional amplifier etc. also can be demonstrated various SCR control circuit and light-operated, sound control circuit etc. in addition.In fact as long as dispose the member block of enough kinds and quantity, arrange differently, make up, fully can needed any one circuit of teaching demonstration.

Compare with present known aforementioned three types electronic circuit demonstration teaching aid, general-purpose electric circuit teaching facility provided by the utility model have following advantage: one, can adapt to the requirement of various complicated circuits, can finish the overall process of design and installation and debugging in a short period of time, improve work efficiency greatly; Two, the circuit that is mounted to is visual in image and circuit theory diagrams are consistent basically, is convenient to analyze and explain the principle and the function of circuit; Three, low cost of manufacture, and sturdy and durable, be convenient to management, can be the laboratory and save overspending; Four, help developing various new-type circuit, help cultivating and improving student's hands-on background, and created advantage for school's research work.

General-purpose electric circuit teaching machine embodiment provided by the utility model is shown in Fig. 1～6.

Fig. 1 is the close-up view of general-purpose electric circuit teaching machine, and Fig. 2 and Fig. 3 are the circuit board stretch-out view, and Fig. 4 and Fig. 5 are the structural drawing of member block, and Fig. 6 is node sheet arrangenent diagram in circuit.

By among Fig. 1, Fig. 2 and Fig. 3 as can be seen: general-purpose electric circuit teaching machine can adopt portable case and bag structure, its mainframe box (1) is made of two planar circuit boards that stick the velcro negative film (2) that can roll over dress, can mount circuit (3) and digital multimeter (4) on the plate face, form pancake case and bag when closing up, when opening, available splicing press strip (5) is combined into left and right and upper and lower two kinds of structures to enlarge the area of circuit board.In teaching and experiment, can with the circuit board horizontal on experiment table, desktop, also can utilize boatswain chair (6) and lifting rope (7) that it is hung, use when a kind of mode in back is convenient to classroom instruction.

Fig. 4 and Fig. 5 are the structural drawing of member block, the represented element of Fig. 4 is a diode, from Fig. 4 a(front elevation) as can be seen the upper strata of this member block diode (13) is installed, the two poles of the earth of diode (15) are passed the plate face and are welded on the copper clad plate of being carved by corruption (8).The symbol (9) that diode is arranged on the panel of member block, it is to be formed by the paper printing of being with adhesive sticker, by Fig. 4 b(vertical view) and Fig. 4 c(side view) in then can find out, carved on the good copper clad plate except that the two poles of the earth that are welded with diode by rotten, also be equipped with two silver-plated binding posts (10), velcro positive (11) is posted in the bottom surface of member block in the bottom of copper clad plate, it is two to match with the velcro negative film that is pasted on the circuit board.The represented element of Fig. 5 then is a triode, Fig. 5 a is the front view of member block, Fig. 5 b is its side view, identical by the structure that can see whole member block among Fig. 5 a, the b with diode among Fig. 4, only triode piece profile is rounded, is printed on the symbol (9) of triode on the panel and joining three the silver-plated binding posts of emitter, collector and base stage (10) of same respectively triode (14) are arranged.Member block can be made of single-clad board, its manufacturing process is as follows: earlier the printed circuit board (PCB) stamping-out is become the similar element board of element standard symbol, again copper film partial corrosion on the printed circuit board (PCB) is fallen, only stay binding post with the joining part of element exit, and stick component symbol with the self-adhesive paper printing at the opposite side (front) of copper film, element and silver-plated binding post are welded, at last stick the velcro positive at the back side of element board (being the copper film face), member block is just made success like this.

Among Fig. 6 a resistive element (15) and a capacity cell piece (16), because both localities are vertical in circuit diagram, so will be converted into the right angle with the elastic wire (19) of silver-plated hook (17) with a node sheet (18).The node sheet is the disk of a band short cylinder, and the velcro positive is posted in its bottom.

The elastic wire surface of adopting can be printed as shades of colours such as red, yellow, green, white in the utility model general-purpose electric circuit teaching machine, makes the circuit of being assembled in bright gay color, can strengthen effect directly perceived, and more helps teaching.The elastic wire group be configured to that the elongation λ b of bee-line Lmin and lead is that parameter is considered between circuit board maximum length (pole-face catercorner length) D, two elements, only need be equipped with the lead of n kind different length usually, wherein:

N=λ b ln (D)/(Lmin)+1

Be D=70 centimetre if circuit board plate face diagonal is long, the interelement bee-line is Lmin=1.5 centimetre, and λ b is 1.7, then:

N=1.7ln 70/1.5+1=7.5

Then this moment elastic wire desirable 7 kinds of specifications, that is: L ₀=1.5 centimetres, L ₁=2.7 centimetres, L ₂=4.86 centimetres, L ₃=8.75 centimetres, L ₄=15.7 centimetres, L ₅=28.3 centimetres, L ₆=48.1 centimetres.

Convenient in order to roll over dress, the elastic wire two ends all are welded with silver-plated hook (as shown in Figure 6), when circuit is installed hook are hung on the silver-plated binding post of member block, rely on elastic force to strain each member block, because of the pulling force of elastic wire can reach 3 kilograms per centimeter ²So making between each member block has good electrical contact.

General-purpose electric circuit teaching machine provided by the utility model at first opens circuit board and is flat on the experiment table desktop in use, or good and sound with the splicing press strip, hangs with boatswain chair and lifting rope.Choose needed member block by circuit parameter again, on circuit board, wouldn't compress with the relative position distribution of pressing circuit diagram greater than the distance of Lmin.After treating that entire circuit figure reasonable Arrangement finishes, pushing the velcro positive that makes member block and circuit more one by one extremely goes up the velcro negative film and tightly locks mutually and allow the member block location, run into when connecting line need bend between two member block, can settle a node sheet again by the suitable position between two elements.Select suitable length, elastic wire that color is different for use by the spacing of binding post between each element at last, with elastic wire with each member block---link up, so entire circuit is a successful installation.The circuit that forms is installed with general-purpose electric circuit teaching machine provided by the utility model, in bright gay color, winding displacement is neat, generally can both be corresponding with circuit diagram, circuit diagram, component symbol and circuit function are molten to be the effect unique of one so can produce, and because binding post is exposed on the circuit diagram surface, each bar circuit all can be disconnected easily, be connected, so when debugging measured electric current, voltage is all very easy.

Claims

1, a kind of general-purpose electric circuit teaching machine that is made of circuit board, member block and lead is characterized in that:

A) circuit board can adopt portable case and bag structure, sticks the velcro negative film above it;

B) be equipped with electronic component and silver-plated binding post on the member block, the standard symbol of this element is decorated with in the front, and the velcro positive is posted at the back side;

C) elastic wire that adopts two ends to be welded with silver-plated hook is made lead;

D) also have the bottom in addition and paste the velcro positive, top is equipped with the node sheet of the insulating trip formation of short circuit terminal.

2, by the described general-purpose electric circuit teaching of claim 1 machine, it is characterized in that member block can make of single-clad board, the component symbol on its front can adopt the self-adhesive paper printing.