JPH0442864Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to an assembly type electromagnetic bell that is used as an electrical learning material.

[Conventional technology]

FIGS. 4 and 5 show a conventional assembly type electromagnetic bell.
a case lid 4 that is removably fitted onto the base 3; a bell body 5 and a bell hammer 6 that are attached to the base 3; and an electromagnet of the base 3. It is equipped with an electromagnet 8 for operating the bell hammer (this electromagnet is made by the user winding an insulated conductor 10a around a bobbin 9) that is fitted and fixed to the mounting part 7, and these parts are not allowed to be used by children or the like. It is constructed by assembling. In addition, in the figure, 10 is a winding coil part on the outer periphery of the bobbin, 11
12 is an iron core to be inserted into the bobbin 9; 12 is a fixed contact fitting having a fine adjustment terminal screw 14 with which the projecting piece 13a of the conductive plate 13 of the bell hammer 6 comes into contact; 15;
shows a set of switch metal fittings connected to the battery contact metal fitting 16 and the fixed contact metal fitting 12 via lead wires.

[Problem that the invention attempts to solve]

By the way, when assembling the electromagnet 8 of the above-mentioned assembly type electromagnetic bell, the user winds the insulated conductor 10a around the bobbin 9 several hundred times.
The process is done by holding the insulated conductor in one hand and holding the insulated conductor in the other hand, which is cumbersome and takes a long time.
There were problems such as not being able to wind the wires neatly.

[Means for solving problems]

In order to solve the above-mentioned conventional problems, this invention provides a bearing notch cut into both side walls of the case lid from the lid opening edge and capable of locking the shaft, and a bobbin insertion locking portion. The present invention is characterized in that it has a hand-cranked handle and is provided with an additional crankshaft for winding that is fitted into the bearing notch when the case lid is removed.

[Effect]

By inserting and locking the bobbin into the crankshaft, fitting the crankshaft with the bobbin into the bearing notch in the case lid, and rotating the handle by hand, the insulated conductor wire can be easily attached to the outer periphery of the bobbin. Can be wrapped.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings. This embodiment includes a base 3 having a battery mounting part 2 equipped with a case lid 4, a bell body 5 and a bell hammer 6 mounted on the base 3. In the conventionally known prefabricated electromagnetic bell shown in FIGS. 4 and 5, which is equipped with an electromagnet 8 for actuating a bell hammer which the user creates by winding an insulated conductor 10a around a bobbin 9, the case lid is Bearing notch 1 having a shaft stop protrusion 17a cut into both side walls of 4 from the edge of the lid opening.
7 and slit portions 18 on both sides thereof, a sound emitting portion 19 is provided at a position opposite to the bell body of the case lid 4, and this sound emitting portion 19 connects an insulated conductor 10a to be wound on a bobbin as shown in FIG. It is formed of a horizontal grid having slit-like openings 20a to 20c through which it can be inserted in a meandering manner, and the windings are used by being fitted into the bearing notches 17, 17 of the case lid 4 when the case lid 4 is removed. It is characterized by the addition of a crankshaft 21 for wire use.

The winding crankshaft 21 has an elastic hook 22 that protrudes and retracts from the outer periphery of the shaft, and a bobbin square flange 9a that protrudes from one side of the shaft flange 23 in a spaced-apart manner.
A rotation stopper 24 (this rotation stopper 24 and the elastic hook 22 form a bobbin insertion locking part)
It is composed of an integrally molded synthetic resin product having a shaft movement prevention part 25 that engages with one side wall of the case lid 4, and a hand-crank handle part 26.

Then, the third bobbin 9 is attached to the crankshaft 21.
Insert and lock the crankshaft 21 with the bobbin into the bearing notches 17, 17 of the case lid 4 as shown in the figure.
In this state, one end of the insulated conductor 10a, which has been inserted into the sound emitting part 19 in a meandering manner, is inserted into the flange hole (not shown) at one end of the bobbin 9 and locked, and the handle part Perform 26 manual turning operations. Then, the bobbin 9 rotates together with the crankshaft 21, and this rotation causes the insulated conductive wire 10a to be wound around the outer periphery of the bobbin 9.

[Effect of idea]

The assembly-type electromagnetic bell of this invention has bearing notches as described above on both side walls of the case lid, and an attached crankshaft for winding that is inserted into the bearing notches. Because of this, the winding work when assembling the electromagnet can be done easily and in a short time, and the insulated conductor wire can be neatly wound around the bobbin without using an expensive electric winding machine. This has excellent practical effects.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main parts of the case lid applied to the assembled electromagnetic bell of the present invention, Figure 2 is a back view of the case lid with the crankshaft attached, and Figure 3 is the crankshaft attached to the case. Figure 4 is a cross-sectional view of the case when it is fitted into the lid, Figure 4 is a plan view of the conventional electromagnetic bell that is the premise of this invention, with the case lid open, Figure 5 is along the - line in Figure 4. It is an arrow sectional view. 1...Battery, 2...Battery mounting part, 3...Base,
4...Case lid, 5...Bell body, 6...Bell hammer, 7...Electromagnet mounting part, 8...Electromagnet, 9...
...Bobbin, 9a...Bobbin square flange, 10...
Winding coil portion, 10a...Insulated conductor wire, 17...
...Bearing notch, 19...Sound output part, 20a to 20c
... Slit-shaped opening, 21 ... Crankshaft for winding, 22 ... Elastic hook for lightening the bobbin, 24 ...
Turning stop part of bobbin square flange, 26... hand turning handle part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A base with a battery mounting part equipped with a case lid, a bell body and a bell hammer attached to the base, and a user who winds an insulated conductor around a bobbin. In the assembly-type electromagnetic bell equipped with an electromagnet for operating a bell hammer made of a wire, a bearing notch cut into both side walls of the case lid from the edge of the lid opening and capable of locking the shaft is provided, A prefabricated electromagnetic bell characterized by having a bobbin insertion locking part, a hand-cranking handle part, and an attached winding crankshaft which is inserted into a bearing notch when the case lid is removed. (2) The case lid has a sound emitting part located opposite the bell body, and the sound emitting part is a horizontal lattice having a slit-like opening through which an insulated conductor wire wound on a bobbin can be inserted in a meandering manner. The assembly-type electromagnetic bell according to claim 1, characterized in that it is formed of: