JPS5886852A - Stator for plane opposite type motor - Google Patents

Abstract

PURPOSE:To connect an armature coil, a stator yoke and a printed circuit substrate easily by forming a terminal section and a projecting section running parallel with the direction of the shaft of the motor to the flange section of a bobbin on which the armature coil is wound. CONSTITUTION:The projecting sections 13a, 13b shaped to the bobbin 2 of the armature coil 1 are inserted and fitted into the inserting holes 3a, 3b of the stator yoke 3. The printed circuit substrate 4 is stacked onto the stator yoke 3, and the terminal pins 14a, 14b of the armature coil 1 are inserted into the through holes 4a, 4b of the substrate. The terminal pins 14a, 14b projected from the through holes 4a, 4b and circuit patterns 4c, 4d are soldered.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stator for a flat-face DC brushless motor used for driving a head drum of a video tape recorder.

In a planar opposed DC motor, the rotor is a ring-shaped permanent magnet magnetized in sections along the internal direction, and a stator consisting of multiple armature coils is placed opposite the magnetic pole surface of the rotor and connected to the motor shaft. It has a configuration in which a magnetic gap parallel to the direction is flattened, and it is thin and can generate a relatively large F-lux, so it is widely used in video tape recorders and various audio equipment. ing.

Therefore, an example of such a planar opposed type motor is shown in a cross-sectional view in Figure #I1. A substrate, 5 a rotating shaft, 6 a rotor yoke, 7 a rotor magnet, 8 a bearing, and 9 a mounting screw.

Note that A represents the entire stator, and B represents the entire rotor.

The armature coil 1 is wound on a seven-piece lunge-type bobbin 2, as shown in the jIz diagram (Fig. The armature coil 1 is made by winding a self-bonding wire made of polyurethane, enameled wire, etc. with an adhesive coating around a bobbin 2, and applying a solvent such as Earl Four during the winding process. Generally, a manufacturing method is adopted in which the adhesive film is melted to form a bond between the windings.Also, the polyurethane coated wire used at this time can be soldered as is at a temperature of As I know, it is possible.

Also, this #l! In Figure 2 (W), 10 is a protrusion for positioning, and 11 is a hole for passing the screw 9 (Figure 111).

Next, Fig. 2 φ) is a front view of the stator ^ with the rotor B removed, and 128112b is the printed circuit board 40.
This is a protruding piece provided around the periphery for winding and connecting the terminal lead wire 1α+1b of the armature coil 1.

The armature coil 1 is attached to the laminated stator yoke 3 and printed circuit board 4 with screws 9, and the protrusion 12a#1
2b&:jl end lead II 1 a t 1b is wound, circuit connections are made by soldering, etc., and the stator is assembled. At this time, the protrusion 10
The rotor B is fitted into a positioning hole provided in the stator yoke 3, so that the armature coil 1 is automatically and correctly positioned. It consists of a rotor magnet 7 made of a ring-shaped ferrite or the like having split magnetized magnetic poles in both directions, a rotor yoke 6 made of a magnetic material such as iron installed on the back side of the rotor magnet 7, and a rotating shaft 5. As is well known, the structure is rotatably supported by a bearing 8.

By the way, the stator of such a conventional plane-opposed motor has five problems as described below, and it is difficult to miniaturize the motor and reduce the cost.

■ A large number (usually 8) of multiple (usually 4 or 6) armature fills arranged at predetermined positions on the stator yoke.
It is necessary to connect the terminal lead wires (1 or 12) to the printed circuit board, but this work is almost impossible to automate. bad.

(2) Similarly, since it is necessary to route a large number of terminal lead wires, extra space is required (for example, protrusions 12at12b are required as shown in FIG. 2(b)).

■ Similarly, since it is necessary to route and connect a large number of single-terminal lead wires, incorrect wiring is likely to occur (this increases the amount of work required to repair defects).

(2) The structure and assembly process are complicated because the means and work for attaching the armature coil to the stator L are completely independent of the fill connection work.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stator for a plane-opposed motor that eliminates the drawbacks of the prior art described above and is easy to downsize and reduce costs.

In order to achieve this object, the present invention makes a terminal pin protrude from the flange part of the bobbin around which the armature coil is wound in a direction parallel to the rotational axis direction of the motor, and the terminal pin and the circuit pattern of the printed circuit board. It is characterized in that the armature coil installation and circuit connection can be performed simultaneously by soldering.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a stator for a planar opposed motor according to the present invention will be described with reference to the drawings.

FIG. 3 is a cross-sectional view of a planar opposed motor equipped with a stator according to an embodiment of the present invention, in which the same or equivalent parts as in FIG. 1 and the first conventional example are denoted by the same reference numerals. Detailed explanation will be omitted.

Now, in Fig. 3, 13 indicates two protrusions for positioning, 14 indicates the terminal pins, which are also provided with two terminal pins, 15 indicates the soldering section, and 16 indicates the direction of the field magnetic flux due to the rotor magnetic screw 7. This is an arrow that represents

Note that A' represents the entire stator according to this embodiment.

Next, FIG. 4 shows a partially exploded perspective view of this stator A1, in which 2a is the 7 flange portion of the bobbin 2, 13α
, 13b represent the two protrusions 13 provided, 14α and 14b similarly represent the terminal pins 14, 3g and 3b are provided on the stator yoke 3, and protrusions 13a+13b are respectively provided. A fitting hole to be fitted, 4α.

4b is provided on the printed circuit board 4, and terminal pin 14α
, 14b are inserted through holes, 4c and 4d5 are circuit patterns.

Furthermore, the height of the protrusions 1'3α and 13b is the same as that of the stator yoke 3.
The thickness of the terminal lead wire 1a is approximately equal to, or slightly smaller than, the thickness of the terminal lead wire 1a.
, lb cross, appropriate clearance grooves and the like are formed.

Then, these protrusions 13G, 13b and the terminal pin 14
(!*14b both protrude from the side surface of the flange portion 2a of the bobbin 2 in the direction of the arrow 16, that is, in the direction parallel to the rotation axis 5 of the motor, and
At least two of these are provided for each bobbin 2.

On the other hand, the bobbin 2 having this flange portion 2G has a second
The armature coil 1 is wound in the same manner as the conventional example shown in the figure, but at this time, the terminal lead wire 1a on the winding start side is wound around the terminal bin 14G, and the terminal lead wire 1b on the winding end side is also wound around the terminal pin 14G.
is wound around the terminal pin 14b.

Therefore, when assembling this stator A'', first, the protrusion 13a provided on the bobbin 2 of the armature coil 1 is
, 13b into the insertion hole 3 a * 3 b of the stator yoke 3
This will cause the stator cover 3 to fit.
The positioning of the armature coil 1 is automatically and correctly determined.

Next, the printed circuit board 4 is stacked on the stator yoke 3, and the armature coil 1 is inserted into the through hole 4a t 4b.
terminal pins 14g and 14b are inserted.

After that, if the terminal pins 14G, 14b protruding from the through holes 48, 4b and the circuit turn 4Ce4d are soldered to form the soldering part 15 (chain 3), the terminal pin 14M and the end * Lead wire IGq and circuit pattern 4
C is electrically connected to the terminal pin 14. b, the terminal lead wire 1b, and the circuit pattern 4d are electrically connected. At the same time, the terminal pin 146 is mechanically fixed to the circuit pattern 4c, and the ζ terminal pins 1 and 4b are mechanically fixed to the circuit pattern 4d. is fixed at a predetermined position with sufficient strength, and the fixed mower A9 is assembled.In the end, according to this embodiment, the armature coil 1 is positioned relative to the fixed electronic ring 3, and the subsequent installation G is completed. The electrical connection work to the printed circuit board 40 circuit I (turn) is carried out through the insertion hole 3 of the protrusion 13at14b formed on the flange part 2.
Insertion of one pair into thg3b and subsequent terminal pin 14
6w14'' circuit patterns 4c and 4d ff&: Therefore, it can be easily and reliably completed in just one continuous operation, and the terminal lead wire 1
Since there is no need to route wires a and Ib for connection, there is no need for additional space and there is no risk of miswiring.

In the above embodiment, the protrusions 13G, 13b and the terminal pins 14a*14b are provided at the same position on the flange part 2C, and the protrusions 13α, 1abK terminal pin 14'*1
4b is embedded, but the present invention is not limited to this, and the protrusion 13a * 13b is embedded in the terminal pin 148t14.
b! According to this embodiment, after fitting into the hole provided in the stator hole 3 or the printed circuit board 4 at the tip of the protrusion, thermal or mechanical By caulking using a suitable method, even better installation strength can be provided.

Further, in the above embodiment, the stator yoke 3 and the printed circuit board 4 are provided with fitting holes 36, 3b and through holes 4g, 4, respectively.
b, into which the protrusion 13cLe13b or the terminal pins 14g, 14b are fitted and inserted, but instead of these holes, for example, notches may be provided.

In the above embodiment as well, an adhesive layer may be provided between the seven flange portions 2a and the fixed anchor 3, and this may be used in conjunction with the adhesion layer.

Furthermore, according to the embodiment described above, various circuit components necessary for configuring the electronic circuit for driving the motor can be mounted on the printed circuit board 4, and the armature coil 1 can be connected and installed together with these components. This further simplifies the assembly process.

As explained above, according to the present invention, the simple structure of providing the terminal pin and the protruding part parallel to the direction of the rotation axis of the motor is provided on the seventh flange part of the bobbin in which the armature coil is installed. Since the positioning and mounting of the armature coil on the stator and the electrical connection to the printed circuit board can be performed simultaneously and easily, the drawbacks of the conventional technology can be eliminated and the flat-faced motor can be made smaller. , it is possible to provide a stator that is useful for low cost F.

[Brief explanation of drawings]

Figure 1 is a sectional view showing a conventional example of a planar opposed type motor, lz figure (b) is a plan view also showing a stator, and Figure 3 is a planar opposed type motor equipped with a stator according to an embodiment of the present invention. FIG. 4 is a partially exploded perspective view showing a stator according to an embodiment of the present invention. 1... Armature coil, la, 1b...
Terminal lead wire, 2...Bobbin, 2G...
・7 Lunge section, 3...Fixed preparation, 3a, 3
b...Inset hole, 4...Printed circuit board, 4a H4b...Through hole, 4c. 4d...Circuit pattern, 13t13b-...
...Positioning protrusion, l'4'514b...One terminal pin. “:1′ A T co2 Te) U3 concave Fig. 4

Claims (1)

[Claims] In a stator of a planar motor having a printed circuit board for forming a connection circuit to the armature coils, at least two flange-type bobbins mounted with the armature coils and each of the bobbins 7 At least two protrusions formed to protrude from the flange part in parallel to the axial direction of the motor, a terminal pin protruding from the seven flange parts in parallel to the axial force direction of the motor, and each of the upper protrusion parts. a stator hole having a fitting hole for fitting the terminal pins therein and a through hole for inserting the terminal pins at predetermined positions; A circuit board is provided, and the armature coil is positioned and installed by soldering the terminal pin of the bobbin inserted into the through hole of the printed circuit board through the through hole of the stator yoke and the circuit board of the printed circuit board. A stator for a flat-faced motor, characterized in that the stator is configured such that the connection is completed.