JPH0234620Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a crossed coil type meter, and particularly to the winding structure of the crossed coil.

[Background of the idea]

A conventional structure of this type of crossed coil type instrument is shown in FIG. This is a disc-shaped movable magnet 2 to which a pointer shaft 1 is attached.
It is rotatably arranged in a coil bobbin 3 that can be divided into upper and lower parts, and an inner coil 4 is first wound around the outer periphery of the coil bobbin 3, and then an inner coil 4 and a coil 4 are wound around the outer circumference of the coil bobbin 3. The outer coil 5 is wound with the winding direction changed by about 90 degrees. Note that 6 is a pointer attached to the tip of the pointer shaft 1, and 7 is its dial. In the case of an air-cored type crossed coil instrument in which the crossed coils 4 and 5 are wound to surround the movable magnet 2, the structure is such that the inner coil 4 is wound first, and then the outer coil 5 is wound. Therefore, if the inner coil 4 and the outer coil are wound with the same number of turns using wire of the same wire diameter, the resistance value of the outer coil 5 will be larger due to the longer winding length. Furthermore, since the distance to the movable magnet 2 becomes longer, the magnetic field becomes weaker if the applied voltage is constant, resulting in a finger index error, that is, an error with respect to the index logically determined by the signal waveform input to the coil. become. Therefore, in order to weaken the magnetic field generated by the inner coil, some coils have a part of the inner coil reversely wound so that the magnetic field is the same as that of the outer coil.

However, forming a reverse winding portion in a coil requires a lot of winding man-hours and time, and also wastes magnetic energy, which is not desirable.

[Purpose of invention]

The present invention has been developed by focusing on these conventional problems, and solves the above problems by alternately winding the inner coil and the outer coil with a predetermined number of turns. The purpose of this invention is to provide a good crossed coil type instrument.

[Example of idea]

The present invention will be explained in detail below based on the embodiment shown in FIG.

This embodiment shows a winding mode of an inner coil and an outer coil that are wound in a crossed manner on the coil bobbin 3 in the above-mentioned crossed coil type instrument. The configuration is no different.

That is, the cross coil 10 according to this embodiment has an X-direction wound coil 1 wound around a coil bobbin 3.
1 and a Y-direction winding coil 12 wound perpendicularly to the X-direction winding coil 11 in a direction perpendicular to the X-direction winding coil 11.

Therefore, in constructing the crossed coil 10, the winding layers of the X-direction winding coil 11 and the Y-direction winding coil 12 are wound alternately one layer at a time. The resistance values of the coil 11 wound in the X direction and the coil 12 wound in the Y direction can be set to be equal.
1 and the Y-direction wound coil 12 are equal in strength, resulting in an effect that a crossed coil type meter with excellent linearity, that is, excellent indicating characteristics, can be obtained. In the above embodiment, the X direction winding coil 11 and the Y direction winding coil 12 are alternately wound one layer at a time, but the number of layers is not limited to one layer and may be several layers.

[Summary of the idea]

As described above, the present invention includes a movable magnet 2 to which the pointer 6 is fixed, a pair of coils 11 arranged crosswise to each other so as to surround the movable magnet 2,
12, the pair of coils 11 and 12 are alternately wound at a predetermined number of turns.

[Effect of idea]

Therefore, according to this crossed coil type meter, since the pair of crossed coils 11 and 12 used in the meter are wound alternately at a predetermined number of turns, the resistance value of both coils is They can be set equally, and as a result, the magnetic field strength from both coils becomes equal, which has the effect of providing a crossed coil meter with excellent indicating characteristics.

[Brief explanation of the drawing]

FIGS. 1A and 1B are cross-sectional explanatory views and plan views of the crossed coil according to this embodiment, and FIG. 2 is an explanatory view of the configuration of a conventional crossed coil type meter. 10...Cross coil, 11...X direction winding coil, 12...Y direction winding coil.

Claims (1)

[Scope of utility model registration request] In a crossed coil type instrument comprising a movable magnet 2 to which a pointer 6 is fixed, and a pair of coils 11 and 12 arranged to cross each other so as to surround the movable magnet 2, the pair of coils 11 and 12
is a crossed coil type instrument characterized by being formed by alternately winding each predetermined number of turns.