JP2588896Y2 - Frequency generator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frequency generator in which a power generating coil pattern and a circuit wiring pattern formed by connecting a plurality of power generating wire elements by connecting wire elements are formed on the same circuit board.

[0002]

2. Description of the Related Art Generally, a frequency generator (FG) attached to various motors and the like is provided with a magnetized portion for a frequency generator which is magnetized and arranged in a plane direction and faces the magnetized portion for the frequency generator. And a power generation coil pattern arranged as described above. The power generation coil pattern is formed in a substantially annular shape on a circuit board, and is connected to a plurality of power generation elements arranged in a radial direction so that each of the power generation elements is arranged in series. Connecting line element. Further, a predetermined circuit wiring pattern is formed on the circuit board.

The configuration of a conventional frequency generator in which a power generation coil pattern and a circuit wiring pattern are formed on a circuit board will be described with reference to the drawings. In FIG. 5, a cylindrical holder 32 is fitted and fixed in a central hole of a circuit board 21 made of an insulating material. The outer ring of the ball bearing 31 is fixed to the upper inner surface of the holder 32, and the rotating shaft 30 is fitted and fixed to the inner ring of the ball bearing 31. The rotating shaft 30 is connected to the circuit board 2 by a ball bearing 31.
It is supported so as to be rotatable with respect to 1. A stator core 35 is attached to the outer peripheral surface of the holder 32. The stator core 35 has salient poles on the outer periphery,
A coil 36 is wound around each salient pole.

A boss 37 is press-fitted and fixed to the tip of the rotating shaft 30, and a cup-shaped rotor case 33 is fixed to the boss 37. A drive magnet 34 is attached to the inner surface of the peripheral wall of the rotor case 33, and the drive magnet 34 faces the salient poles of the stator core 35 with a certain gap. Therefore, the drive magnet 34 and the rotor case 33 are biased by controlling the energization of the coil 36, and the rotating shaft 30 is driven to rotate.

The portion of the drive magnet 34 on the circuit board 21 side is a frequency power generating magnetized portion 34a. The power generating coil pattern 22 corresponding to the frequency power generating magnetized portion 34a is disposed on the circuit board 21 so as to be substantially annular. As shown in FIG. 6, the power generation coil pattern 2
2 is composed of a plurality of power generating wire elements 24 and connecting wire elements 25a and 25b. The power generating wire elements 24 are arranged on the circuit board 21 in the radial direction. The connecting wire elements 25a and 25b alternately connect the outer end and the inner end of the power generating wire element 24 in a zigzag manner.
, The connecting wire element 25b connects the inner end of the power generating wire 24. In this way, the entire power generation wire element 24 is configured as an integrated serial body.

[0006] As shown in detail in FIG. 6, some appropriate portions of the plurality of connecting line elements 25 a and 25 b are missing portions 27. The circuit wiring pattern 23 is formed on the circuit board 21 by printing through each of the missing portions 27. Further, over the circuit wiring patterns 23, the missing portions 27 are in contact with the circuit wiring patterns 23 in a non-contact insulating state.
In order to short-circuit each other, jumper chips (not shown) are provided. By using the jumper chip in this manner, the power generation coil pattern 22 can be formed.
Has a perfect shape with no dropouts on the entire circumference, so that there is no wow and flutter of the FG power generation output as can be seen from the graph of FIG.

[0007]

However, the use of a jumper chip increases the manufacturing cost, and the use of a jumper chip reduces the degree of freedom in arranging circuit elements on a circuit board. It becomes difficult to arrange circuit wiring patterns and components.

As a method for forming a coil pattern for power generation on a circuit board, a circuit wiring pattern is first formed on a circuit board, an undercoat is applied to a necessary portion from above, and power generation is performed thereon. There is a type in which a coil pattern for power generation is printed and finally overcoated on the coil pattern for power generation. However, when a power generation coil pattern is formed on a circuit board by this method, many steps such as undercoating and overcoating are required, which causes a problem that production efficiency is low and manufacturing cost is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is a low cost device which maintains sufficient performance and is suitable for forming parts and circuit wiring patterns on a circuit board. It is intended to provide a frequency generator having a high degree of freedom.

[0010]

According to the present invention, a magnetized portion for a frequency generator, which is magnetized in a plane direction, is formed on a circuit board so as to face the magnetized portion for the frequency generator. And a circuit wiring pattern formed on a circuit board. The power generating coil pattern includes a plurality of power generating elements arranged in a radial direction and the power generating elements. In a frequency generator comprising a connecting wire element connected in series, an opening is formed in a part of a coil pattern for power generation, a circuit wiring pattern is passed through the opening, and the opening is opposed to the opening by 180 °. The power generating coil pattern has a missing portion of the power generating wire element at the position where the power generating coil pattern is formed, and two power generating wire element missing portions are further formed at two positions displaced by 90 ° from the opening.

[0011]

By forming an opening in the coil pattern for power generation through which the circuit wiring pattern and the like pass, the integration effect is lost and the characteristics are deteriorated. Flutter 1
The rotation component is improved. The missing portion formed at two places displaced by 90 ° from the opening improves the component twice per rotation of the wow and flutter.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the frequency generator according to the present invention will be described below with reference to the drawings. In FIG.
A power generation coil pattern 2 is formed on the upper surface of the circuit board 1. The power generation coil pattern 2 includes a plurality of power generation wire elements 4 and connection wire elements 5a and 5b. The power generating wire elements 4 are arranged on the circuit board 1 in the radial direction. The connecting wire elements 5a and 5b alternately connect the outer end and the inner end of the power generating wire element 4 in a zigzag shape, and the connecting wire element 5a connects the outer end of the power generating wire element 4 to each other. A wire element 5 b connects the inner ends of the power generation wire element 4. In this way, the entire power generating wire element 4 is configured to be an integrated serial body.

Both ends of the series body of the power generating wire elements 4 are drawn outward at a portion denoted by reference numeral 6 and are further routed so that the outer circumferences of the connecting wire elements 5a are arcuate in directions opposite to each other. Further, it is drawn out to the outside at the portion indicated by the symbol A and connected to the electrode 10. The portion indicated by reference numeral 6 is an opening, and another circuit wiring pattern 3 is disposed on the inner peripheral side of the power generation coil pattern 2 through the opening 6.

At the position where the power generating wire element 4 is opposed to the opening 6 by 180 ° with the central hole of the circuit board 1 interposed therebetween, a cutout portion 7 is formed by removing two power generating wire elements 4. In addition, two power generating wire elements 4 are also removed at two places displaced 90 ° on both sides of the opening 6 of the power generating coil pattern 2 to form a missing portion 7.

Assuming that only the opening 6 is formed in the power generating coil pattern 2 and there is no missing portion 7 in other portions, when applied to a wave number generator, wow and flutter are generated to obtain sufficient characteristics. Can not. The main components of the wow and flutter are one rotation component indicated by reference symbol B in the graph of FIG. This code B, C
If the component of one rotation and the component of two rotations per rotation can be reduced, wow and flutter can be suppressed to such an extent that the characteristics of the frequency generator are not substantially affected.

In order to reduce wow and flutter, the power generating wire element 4 was removed at a position 180 ° opposite to the opening 6 to form a missing portion 7. By forming the notch 7 at a position 180 ° opposite to the opening 6, as can be seen from the graph shown in FIG. 4, one rotation component of the wow and flutter indicated by the symbol B can be significantly reduced. However, it was not possible to reduce the component twice in one rotation indicated by the symbol C.

For this reason, as shown in FIG. 1, in addition to forming the notch 7 at a position 180 ° opposite to the opening 6 of the power generating coil pattern 2, the power generating coil pattern 2 is displaced 90 ° from the opening 6. The power generating wire element 4 was also removed at the location to form the missing portion 7. By such a configuration, as shown in the graph of FIG. 2, minutes Tensei one symbol B which is a main component of wow and flutter, can be reduced twice ingredient per revolution of the code C Thus, it is possible to form a frequency generator with sufficient performance. In addition to wow and flutter,
It is also possible to reduce the adverse effects due to the leakage magnetic flux of the drive magnet indicated by the symbol D in the graph of FIG.

In FIG. 1, since the coil pattern 2 for power generation is not completely closed but is opened by the opening 6, the degree of freedom in arranging the circuit wiring pattern 3 and components is greatly improved. I do. Further, since no jumper chip is used, the cost can be reduced.

In the above embodiment, the number of the power generating wires 4 to be removed is two in the opening 6 and the three missing portions 7. However, the present invention is not limited to this. There is no problem if the number of pieces to be removed in the unit 7 is equal.

[0020]

According to the present invention, there is provided a magnetized portion for a frequency generator, and a power generating coil pattern formed on a circuit board so as to face the magnetized portion for a frequency generator. In the frequency generator, an opening is formed in a part of the power generation coil pattern, a circuit wiring pattern is passed through the opening, and a power generation wire element of the power generation coil pattern is formed at a position 180 ° opposite to the opening. Forming a missing part,
In addition, since the missing portions of the power generation wire elements are formed at two places displaced by 90 ° from the opening, the degree of freedom of arrangement of the circuit wiring pattern is improved by the opening, and the frequency generator is deteriorated by forming the opening. Characteristics are improved by forming a missing portion of the power generation element, thereby reducing wow and cost.
It is possible to obtain a frequency generator with less flutter and sufficient characteristics.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a circuit board applied to the frequency generator according to the present invention.

FIG. 2 is a graph showing frequency characteristics of the frequency generator.

FIG. 3 is a graph showing a frequency characteristic in a case where the power generation coil pattern has one missing power line element.

FIG. 4 is a graph showing frequency characteristics in a case where power generation wire elements of a power generation coil pattern are missing at two locations (180 ° opposed).

FIG. 5 is a sectional view showing an example of a conventional frequency generator.

FIG. 6 is a plan view showing an example of a circuit board applied to the frequency generator.

FIG. 7 is a graph showing frequency characteristics of the frequency generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Circuit board 2 Power generation coil pattern 3 Circuit wiring pattern 4 Power generation wire element 5 Connection wire element 6 Opening 7 Missing part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02K 29/00 H02K 3/26 H02K 21/00

Claims (2)

(57) [Scope of request for utility model registration] A magnetized portion for a frequency generator arranged in a plane direction and a substantially annular power generating coil formed on a circuit board so as to face the magnetized portion for a frequency generator. And a circuit wiring pattern formed on the circuit board. The power generating coil pattern connects a plurality of power generating elements arranged in a radial direction and the power generating elements to form a serial body. In a frequency generator comprising a connecting wire element, an opening is formed in a part of the power generation coil pattern, and the circuit wiring pattern is passed through the opening,
The opening of the power generating coil element of the coil pattern for power generation was formed at a position 180 ° opposite to the opening, and the missing parts of the power generating element were also formed at two places displaced by 90 ° from the opening. Features frequency generator. 2. The frequency generator according to claim 1, wherein the number of missing power generating wire elements in the opening and each missing portion is the same.