JPH0449639Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention relates to an electrical conduction experiment tool used as an electrical teaching material.

(Prior Art) Conventionally, a device has a main body equipped with a lamp that is lit by a battery, and a tester rod attached to the ends of two lead wires extending from the device main body, and these two tester rods are connected to a metal conductor. Electric conduction experimental equipment is known in which the lamp lights up when it comes in contact with a body, but does not light up when it comes into contact with a non-conductive object such as plastic.

(Problems to be Solved by the Invention) However, the conventional electrical conductivity test device described above only had the function of a tester for examining the electrical conductivity of various articles, and could not be recombined and used as a pocket light. .

The purpose of this invention is to provide an electrical continuity experiment tool that can be used not only as a tester to examine the electrical conductivity of various articles, but also as a pocket light.

(Means for Solving the Problems) In order to achieve the above-mentioned objectives, this invention consists of a device main body configured as a pocket light case equipped with a lid that can be closed and removed, and a battery compartment inside the light case. The tester holder is provided with a lamp holder and a tester holder that can set and hold two tester rods in parallel.A lead wire extension hole and a switch mounting part are provided in the outer wall of the case, and the tester is attached to the switch mounting part. The present invention is characterized in that a slide switch having a switch metal fitting that can be connected and separated is attached to the metal terminal portion of two tester rods set and held in the holding part, and a lamp projecting part is provided on the case lid. be.

(Function) When used as an electrical continuity test tool with two lead wires extending outward from the instrument body, when the two tester rods attached to the ends of the lead wires are brought into contact with a metal conductor, If the lamp lights up and comes in contact with a non-conductive object such as plastic, the lamp will not light up. Therefore, you can check whether the lamp lights up by applying the tester rod to various objects and see if the lamp lights up or not. Electrical conductivity can be easily checked.

Also, remove the case lid, set and hold two tester rods in parallel in the tester holding part of the light case, store the lead wires of the tester rods in the case, and close and secure the case lid. By rearranging it, you can use it as a pocket light. In this case, the two tester rods set and held in the case are positioned so that their metal terminals can come into contact with and separate from the switch metal fitting, so when the slide switch is turned on, the two tester rods
When the tester rod of the book is short-circuited with the switch metal fitting and the lamp lights up, and the slide switch is turned off, the switch metal fitting separates from the metal terminal part of the tester rod and the lamp turns off.

(Example) An example of this invention will be described below with reference to the drawings. In this example, tester rods 4 and 5 attached to the ends of two lead wires 2 and 3 extending from the instrument body 1 are connected to a metal conductor. In a conventionally known electrical continuity experiment device in which a lamp 6 of the device body 1 lights up when brought into contact, the device body 1 is constructed as a case of a pocket light with a lid 11 that can be closed and removed. The light case 10 is provided with a tester holder 17 that can set and hold a battery 14 accommodating part 15, a lamp holder 16, and two tester rods 4 and 5 in parallel, and a lead wire is provided on the outer wall of the contact case 10. Extension holes 12 and 13 and a switch mounting portion 18 are provided.

The battery storage section 15 is formed of a battery box in which a contact plate 19 with which the anode of the battery 14 contacts and a contact plate 20 with which the cathode of the battery 14 contacts are inserted and fixed at both ends. The lead wire 2 is connected to the contact plate 19, and the lead wire 6a of the lamp 6 is connected to the contact plate 19. The other lead wire of the lamp 6 extends outward through the lead wire extension hole 13 of the case 10 and is used as the lead wire 3 of the other tester rod 5.

The tester holding portion 17 inside the case 10 includes a pair of support plates 21 and 22 that are spaced apart from each other and project from the inner bottom of the case, and a tester rod lower receiving protrusion that projects from the lower side of the opposing sides of both support plates. vs. 21a, 22a
The two tester rods 4 and 5 are inserted and held between the support plates 21 and 22, and pressed from above by the lid inner surface protrusion 23, so that the two tester rods 4 and 5 are parallel to each other. It is designed to be able to maintain a set point. Note that the support plate 22 facing the switch mounting portion 18 is provided with metal fitting fitting holes 22b (in a U shape) for the tester bars 4 and 5.

The switch mounting portion 18 of the case 10 has a slide switch 25 having a switch metal fitting 24 that can be connected to and separated from the metal terminal portions 4a, 5a of the two tester rods 4, 5 set and held in the tester holding portion 17.
is attached to the case lid 11, and a lamp projecting portion comprising a circular hole 27 that opens into the lamp chamber 26, and a light transmitting plate 29 that is fitted and fixed to the lamp chamber forming frame 28 and closes the circular hole 27. 30 are provided.

Figure 1 shows two lead wires 2 and 3 connected to the instrument body 1.
(Light case 10) Lead wire extension holes 11, 1
This figure shows the state in which it is used as an electrical continuity test tool extending outward from the lead wires 2 and 3. In this state, the two tester rods 4 and 5 attached to the tips of the lead wires 2 and 3 are Light the lamp 6 on the item.
You can easily check the electrical conductivity of the item by seeing whether it lights up or not.

In the assembled state as a conductive experiment tool as described above, the case lid 11 is removed and the two tester rods 4 and 5 are placed in parallel to the tester holding portion 17 of the light case 10 as shown by the imaginary lines in FIG. After removing the lead wires 2 and 3 of the tester rods 4 and 5 from the lead wire extension holes 12 and 13 and storing them in the case 10, the case lid 11 is closed and fixed again. By performing this rearrangement, a pocket light as shown in FIG. 4 can be constructed. In this case, the two tester rods 4 and 5 set and held in the case 10 are positioned as shown in the imaginary lines in FIG. So, when you turn on slide switch 25,
The two tester rods 4 and 5 are short-circuited by the switch metal fittings 24 to light up the lamp 6, and when the slide switch 25 is turned off, the switch metal fittings 24 connect the metal fitting terminals 4a and 4 of the tester rods 4 and 5. The lamp 6 can be turned off by moving away from the lamp 5a.

(Effect of the invention) Since the electrical conductivity experimental device of this invention has the above-mentioned configuration, it can be used as a pocket light in addition to being used as a tester for examining the electrical conductivity of various articles. effective.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the electrical conduction test device of this invention with the case lid open; Figs. FIG. 4 is a vertical cross-sectional view taken along the line in FIG. 1 when the electrical conduction experimental device of the present invention is reassembled into a pocket light. 1... Instrument body, 2, 3... Lead wire, 4, 5
... Tester rod, 6 ... Lamp, 10 ... Light case, 11 ... Case lid, 12, 13 ... Lead wire extension hole, 14 ... Battery, 15 ... Battery compartment, 16 ... Lamp holder 17...Tester holding part, 18...Switch mounting part, 24...Switch fitting, 25...Slide switch, 30...Lamp projecting part.

Claims (1)

[Scope of utility model registration request] An electrical continuity test device that lights up a lamp on the device body when a tester rod attached to the ends of two lead wires extending from the device body comes into contact with a metal conductor, and the device body can be closed and removed. The light case is configured as a pocket light case with a lid, and the light case is provided with a battery storage section, a lamp holder, and a tester holder that can set and hold two tester rods in parallel, and an outer wall of the case is provided. A lead wire extension hole and a switch mounting part are provided in the part, and a slide switch having a switch metal fitting that can be connected to and separated from the metal terminal parts of the two tester rods set and held in the tester holding part is installed in this switch fitting part. . An electrical continuity experiment device, characterized in that the case lid is provided with a lamp projecting part.