CN219590995U

CN219590995U - Hand-held electricity teaching aid

Info

Publication number: CN219590995U
Application number: CN202320278399.4U
Authority: CN
Inventors: 邓磊; 秦小滨; 彭超; 曹玉娴; 魏红梅; 柯昌静; 姚丽
Original assignee: Chongqing Wanzhou Vocational Education Center
Current assignee: Chongqing Wanzhou Vocational Education Center
Priority date: 2023-02-22
Filing date: 2023-02-22
Publication date: 2023-08-25
Anticipated expiration: 2033-02-22

Abstract

The utility model relates to an electrician basic teaching device, in particular to a handheld electricity teaching aid. The utility model discloses a handheld electric teaching aid which comprises a PCB (printed circuit board), an electric element, a positioning cylinder and a metal spring plate. According to the utility model, under the condition that the electric element is still used for being spliced with the PCB, the positioning cylinder and the metal elastic sheet are additionally arranged, so that the pins of the electric element can be pressed by the metal elastic sheet when penetrating through the mounting holes and the positioning cylinder. Therefore, the fixing of the electric element and the PCB is ensured through the deformation of the metal elastic sheet, and the connection of the electric element and the wiring of the PCB is ensured through the conductivity of the metal elastic sheet, so that the subsequent detection experiment of the electric element is facilitated.

Description

Hand-held electricity teaching aid

Technical Field

The utility model relates to an electrician basic teaching device, in particular to a handheld electricity teaching aid.

Background

The inventor finds that the general characteristics of middle school students are actigraphy and anaesthesia in daily teaching for middle school students, and the traditional teaching type teaching and demonstration type teaching is insufficient for attracting the interests of the students, so that the students are difficult to be interested in the electric profession, and other modes are needed to be excited.

The inventor considers that the direct physical experiment can only lead students to raise interests, and most students have strong participation will in practical application. While schools are equipped with experimental equipment for the electrician's basic discipline, these training equipment are generally characterized as either too bulky or too expensive to be suitable for simple experimental operations during ordinary hours of class.

Therefore, the inventor researches and designs a small-sized electric teaching aid, and can refer to other documents submitted with the proposal. Referring to fig. 1, 2 and 3, basic electrical teaching experiments can be performed by wiring and mounting electrical components such as resistors, capacitors and the like on a PCB substrate. However, the existing means is that the electrical component is mounted on the PCB substrate by plugging, i.e. the PCB substrate is provided with mounting holes, and pins of the electrical component are inserted into the mounting holes, so that the mounting holes and the pins are not matched easily in this way: for example, if Kong Pianxiao is installed, the pins cannot be inserted; if Kong Pianda is mounted, the electrical components are connected in a virtual manner, and although the electrical components can be welded and reinforced by using solder, the solder needs to be removed when the electrical components are subsequently disassembled, and the use of an electric soldering iron is also troublesome for a beginner.

Disclosure of Invention

The utility model provides a handheld electric teaching aid, which aims to solve the problem that the use of a small electric teaching aid in the prior art is unsmooth due to mismatching of pins and mounting holes.

The utility model is realized by adopting the following technical scheme:

the utility model discloses a handheld electric teaching aid which comprises a PCB (printed circuit board), an electric element, a positioning cylinder and a metal spring plate.

The PCB is provided with mounting holes for plugging pins of the electrical components. The mounting holes are provided with a metal plating for communication with the PCB board wiring. The positioning cylinders are the same in number with the mounting holes, are connected to one side of the PCB and correspond to the mounting holes. The metal spring plate is arranged in the positioning cylinder. One end of the metal spring plate is communicated with the metal coating, and the other end of the metal spring plate has a tendency of shifting towards the center of the positioning cylinder and presses a pin penetrating through the mounting hole.

As still further aspects of the utility model: at least two metal spring plates are uniformly arranged in each positioning cylinder.

As still further aspects of the utility model: and a spring used for tightly pressing the metal elastic sheet to the pin is further arranged between the other end of the metal elastic sheet and the inner wall of the positioning cylinder.

As still further aspects of the utility model: the locating cylinder is arranged concentrically with the through hole, and the inner diameter of the locating cylinder is larger than the inner diameter of the mounting hole.

As still further aspects of the utility model: the electric element is one or more of a fixed resistor, a variable resistor, a capacitor, an inductor, an LED lamp and a diode. The PCB board is also provided with a wiring terminal for experimental detection of the electrical element.

As still further aspects of the utility model: and one side of the PCB is also provided with a power supply assembly for supplying power to the experimental detection of the electrical element.

The power supply assembly comprises a storage battery power supply part and an external power supply part. The battery power supply part comprises a battery mounting groove and a dry battery. The battery mounting groove is fixed on the PCB board, and the dry battery is detachably arranged in the battery mounting groove. The external power supply part comprises a DC conversion head. The DC conversion head is fixed on the PCB.

As still further aspects of the utility model: the battery mounting grooves are arranged in two parallel and connected in series.

As still further aspects of the utility model: the DC conversion head is a 2.5mm power interface or a USB interface.

As still further aspects of the utility model: the specification of the PCB is 150 cm.180cm.

As still further aspects of the utility model: the PCB is provided with a change-over switch for controlling the power supply to be turned on or off.

The utility model has the following beneficial effects:

1. according to the utility model, under the condition that the electric element is still used for being spliced with the PCB, the positioning cylinder and the metal elastic sheet are additionally arranged, so that the pins of the electric element can be pressed by the metal elastic sheet when penetrating through the mounting hole and the positioning cylinder, the electric element and the PCB are ensured to be fixed through the deformation of the metal elastic sheet, and the connection between the electric element and the wiring of the PCB can be ensured through the conductivity of the metal elastic sheet, so that the follow-up detection experiment of the electric element is facilitated.

2. According to the utility model, the metal elastic sheet is arranged in the positioning cylinder, and the metal elastic sheet is protected on one hand, so that the condition that the use deformation is influenced due to the fact that the metal elastic sheet is exposed outside and is easy to receive external force is avoided; on the other hand, the stitch can still continue to extend a distance in the positioning cylinder after passing through the metal elastic sheet, so that the compaction effect of the stitch by the metal elastic sheet is guaranteed, and the stitch is supported by the positioning cylinder when the experiment detection is horizontally placed, so that the condition that the stitch is jacked up and separated from the metal elastic sheet to cause experimental failure can be avoided.

3. Compared with the traditional large-scale practical training platform, the small-sized electric teaching aid designed by the utility model has a small structure and is convenient to hold. According to the basic electrical experimental design, the cost of batch printing of the PCB is far lower than that of the existing popular science tools in the market, and the adopted electrical elements are stock parts in a laboratory, so that the PCB is convenient to operate and maintain.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front view of a small-sized electric teaching aid according to the background art;

FIG. 2 is a reverse side block diagram of a small electric teaching aid of the background art;

FIG. 3 is a layout of a PCB board of a small-sized electrical teaching aid as mentioned in the background;

fig. 4 is a partial cross-sectional view of the handheld electric teaching aid provided by the utility model after the electric element and the PCB board are spliced;

FIG. 5 is a partial cross-sectional view of the handheld electrical teaching aid of the present utility model when the electrical component is separated from the PCB;

in the drawings, the list of components represented by the various numbers is as follows:

1. PCB board, 2, mounting hole, 3, metal coating, 4, stitch, 5, a positioning cylinder, 6, metal shrapnel, 7, spring.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Please refer to fig. 1 and 2, which are block diagrams of a small-sized electric teaching aid in the background art. Referring additionally to fig. 3, a layout of a PCB board of a small-sized electrical teaching aid is provided.

The handheld electric teaching aid is improved based on the small electric teaching aid in the background technology, and therefore the handheld electric teaching aid also comprises the same basic structure as the small electric teaching aid.

Referring to fig. 4, the handheld electric teaching aid comprises a PCB board 1, electric elements, a positioning cylinder 5 and a metal spring plate 6.

In this embodiment, the specification of the PCB board 1 is 150cm×180cm, and the thickness is 2mm. Of course, the specifications are not rigidly defined, but should be convenient to handle.

The PCB board 1 is machined with mounting holes 2 for plugging in pins 4 of the electrical component. The mounting holes 2 are processed with metal plating layers 3 for wiring communication with the PCB board 1. Thus, the pins 4 of the electrical component are secured in conductive communication with the metallization layer 3 as they pass through the mounting holes 2.

The positioning cylinders 5 are the same in number as the mounting holes 2. The positioning cylinder 5 is connected to one side of the PCB 1 and is arranged corresponding to the mounting hole 2. It is recommended to arrange the positioning cylinder 5 concentric with the mounting hole 2, and the inner diameter of the positioning cylinder 5 should be larger than that of the mounting hole 2, so as to facilitate the penetration of the stitch 4.

The metal spring plate 6 is arranged in the positioning cylinder 5. Referring to fig. 5, a state diagram of the electrical component separated from the PCB board 1 is shown. One end of the metal spring 6 is connected with the metal plating layer 3, and the other end of the metal spring has a tendency to deviate towards the center of the positioning cylinder 5, because the other end of the metal spring 6 deviates towards the center of the positioning cylinder 5 due to the self-elastic property of the metal spring, so that the channel of the positioning cylinder 5 is narrowed and smaller than the outer diameter of the pin 4. Thus, when the pin 4 penetrates into the positioning cylinder 5, the metal spring plate 6 is extruded. The other end of the metal elastic sheet 6 is pressed to pass through the pin 4, so that the pin 4 is pressed and is in conductive communication with the pin 4.

Of course, one end of the metal spring plate 6 may be directly connected to the metal plating layer 3. The design can also be adopted, the positioning cylinder 5 is made of metal materials, the positioning cylinder 5 is connected with the metal coating 3, one end of the metal elastic sheet is connected with the inner wall of the positioning cylinder 5, and thus the conductive communication between the metal elastic sheet 6 and the metal coating 3 is realized.

It should be noted that, the positioning cylinder 5 not only plays a role in protecting the metal spring 6, but also can avoid the condition that the pin 4 is easy to be ejected. Firstly, in practical teaching, if the positioning cylinder 5 is not arranged, the metal elastic sheet 6 is exposed outside, and because students are more, the number of corresponding handheld electric teaching aids is also more, if the teaching aids are stacked together, the teaching aids positioned below are pressed, the metal elastic sheet 6 is easy to generate irreversible deformation, and then the stitch 4 cannot be pressed and electrically conducted when in use; the positioning cylinder 5 is arranged, and the metal elastic sheet 6 is arranged in the positioning cylinder 5, so that the situation can be effectively avoided. Second, the stitch 4 is threaded into the positioning cylinder 5 through the mounting hole 2. When the subsequent experiment is detected, the teaching aid is generally horizontally placed, and if the penetration amount of the stitch 4 is too short and the isolation of the positioning cylinder 5 is lacked, the stitch 4 can be easily jacked up to be separated from the metal elastic sheet 6, so that the experiment fails; the positioning cylinder 5 is arranged, the stitch 4 can continue to extend in the positioning cylinder 5 for a certain distance after passing through the metal elastic sheet 6, so that the compression effect of the stitch 4 by the metal elastic sheet 6 is ensured, and the stitch 4 can be prevented from being jacked up by the positioning cylinder 5 under the supporting effect when the experiment detection is horizontally placed.

In order to ensure the fixing effect of the pins 4, at least two metal elastic sheets 6 are uniformly arranged in each positioning cylinder 5. Referring to fig. 4, there is shown a case where 2 metal spring pieces 6 are provided: the two metal spring plates 6 are symmetrically arranged, so that the stitch 4 is clamped and fixed in the middle.

In addition, in order to further enhance the pressing force of the metal elastic sheet 6, a spring 7 may be installed between the other end of the metal elastic sheet 6 and the inner wall of the positioning cylinder 5. The spring 7 employs a compression spring, so that the tendency of the other end of the metal spring 6 to deflect toward the positioning cylinder 5 is enhanced, thereby pressing the pin 4.

Although the pins 4 are pressed by the metal spring 6, the electrical component can be easily removed from the PCB board 1 by pulling out the electrical component with a certain external force.

In addition, for the handheld electric teaching aid, the wiring of the PCB 1 is designed according to basic experiments, so that the electric element is one or more selected from a resistor, a variable resistor, a capacitor, an inductor, an LED lamp and a diode, and the wiring terminal of the electric element is LED out of the PCB 1 and used for experimental detection of the electric element.

Referring to fig. 1 to 3, in the present embodiment, the plug-in mounted electric components include fixed resistors (R1 to R8), variable resistors (R9, R10, R11, R15, R17, R19), capacitors (C1, C2, C3, C4, C12), inductors (D1, D2, D4), LED lamps (LED 1 to LED 5), and diode (D3). In addition, part of the electrical components are also mounted on the PCB board 1 as necessary components for constructing the circuit.

Of course, need carry out the power supply when carrying out experimental detection, this handheld electricity teaching aid adopts many power supply designs, can use the battery to supply power, also adopts the mode of external DC electricity to supply power. One side of the PCB 1 is provided with a power supply assembly for supplying power to the experimental detection of the electrical element. The power supply assembly comprises a storage battery power supply part and an external power supply part. The battery power supply part comprises a battery mounting groove and a dry battery. The battery mounting groove is fixed on the PCB board 1, and the dry battery is detachably arranged in the battery mounting groove. The external power supply part comprises a DC conversion head. The DC conversion head (i.e., DC1 in fig. 1) is fixed on the PCB board 1.

Wherein, in order to guarantee that the battery power supply portion provides sufficient electric quantity, can set up two, battery mounting groove that establish ties. The DC conversion head can adopt a 2.5mm power interface or a USB interface, and is selected according to actual conditions. In addition, a switch (i.e., SW1 in fig. 1) for controlling the power supply to be turned on or off is provided on the PCB board 1 to improve the flexibility of control.

For example, an ohm law resistor voltage division experiment needs to be performed, three resistors R1, R2 and R3 are firstly arranged on the PCB board 1, then the three resistors are connected in series through the lead ends of the resistors R1, R2 and R3, and then the three resistors are connected with a power supply assembly and a change-over switch to form a loop. Thus, the change-over switch is closed, the power supply assembly acts on R1, R2 and R3, the voltages at two ends of the power supply assembly, the voltages at two ends of R1, the voltages at two ends of R2 and the voltages at two ends of R3 are sequentially measured through the universal meter, and the conclusion can be obtained by repeating the steps for several times: and the voltage across the power supply component=the voltage across the R1 terminal +R2 terminal +R3 terminal, thus finishing the resistance voltage division experiment of ohm's law. For other experiments, the general idea is the same as above, and no further description is given.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The handheld electric teaching aid comprises a PCB board and an electric element, and is characterized in that,

the PCB is provided with mounting holes for plugging pins of the electrical element; the mounting holes are provided with metal plating layers used for being communicated with the PCB wiring;

the handheld electricity teaching aid further comprises:

the positioning cylinders are connected to one side of the PCB and correspond to the mounting holes in number;

a metal spring plate arranged in the positioning cylinder; one end of the metal elastic sheet is communicated with the metal coating, and the other end of the metal elastic sheet has a tendency of shifting towards the center of the positioning cylinder and presses a pin penetrating through the mounting hole.

2. The hand-held electrical teaching aid of claim 1, wherein: at least two metal elastic sheets are uniformly arranged in each positioning cylinder.

3. The hand-held electrical teaching aid of claim 1, wherein: the positioning cylinder and the through hole are concentrically arranged, and the inner diameter of the positioning cylinder is larger than the inner diameter of the mounting hole.

4. The hand-held electrical teaching aid of claim 1, wherein: and a spring used for tightly pressing the metal elastic sheet to the pin is further arranged between the other end of the metal elastic sheet and the inner wall of the positioning cylinder.

5. The hand-held electrical teaching aid of claim 4, wherein: the electrical element is one or more of a fixed-value resistor, a variable resistor, a capacitor, an inductor, an LED lamp and a diode;

the PCB is also provided with a wiring terminal for experimental detection of the electrical element.

6. The hand-held electrical teaching aid of claim 1, wherein: one side of the PCB is also provided with a power supply assembly for supplying power to the experimental detection of the electrical element;

the power supply assembly includes:

a battery power supply unit including a battery mounting groove and a dry battery; the battery mounting groove is fixed on the PCB, and the dry battery is detachably arranged in the battery mounting groove; and

an external power supply unit including a DC converter; the DC conversion head is fixed on the PCB.

7. The hand-held electrical teaching aid of claim 6, wherein: the battery mounting grooves are arranged in parallel and connected in series.

8. The hand-held electrical teaching aid of claim 6, wherein: the DC conversion head is a 2.5mm power interface or a USB interface.

9. The hand-held electrical teaching aid of claim 1, wherein: the specification of the PCB is 150 cm-180 cm.

10. The hand-held electrical teaching aid of claim 6, wherein: and a change-over switch for controlling the power supply to be turned on or off is arranged on the PCB.