JPH01268103A - Manufacture of coil bobbin and coil - Google Patents

Abstract

PURPOSE:To obtain a high-reliability coil and to contrive the improvement in quality by enabling perfect automatic by providing a flange arranged at the end of a bobbin main body with a cut depression whose cut surface ranges from the inner end plane to the circumferential end plane of said flange, at least which is cut toward the circumference, thereby insulating wire terminals from a winding part. CONSTITUTION:When the winding of a wire 5 starts, a wire terminal 5p is previously fastened to a binding pin 12 and the terminal 5p is inserted into a cut portion 4c after it is hung on a guide pin 10. Next, when the wire terminal 5p is released from the guide pin 10 by bending said pin 10 ant the end of a winding step, the terminal 5p loosens. As a result, the wire terminal 5p bound with a binding pin 12 can be drawn out, and at the same time, a ring 5r formed of the wire terminal 5p can be made. Accordingly, this ring 5r can be inserted into a connection pin 14 and these can be connected. Then, the wire terminal 5p as a winding-start end can be inserted into the cut portion through a cut surface 4c and while it is suspended with a suspending part 9, it can be drawn out from a cutout 8 to the side of an inner end 3i and the wire terminal 5p can be isolated from a winding part 6 by an isolating mean 7 and is also electrically isolated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coil bobbin used for coils of DC solenoids, stepping motors, etc., and a method of manufacturing a coil using this coil bobbin.

[Prior art and its problems] Conventionally, multi-turn coils or coils with high insulation class, such as coils used in DC solenoids, have been subjected to insulation treatment to prevent contact between the wire end at the beginning of winding and the winding part. The method shown in Figure 9 was adopted. That is, as shown in the figure, the inner end surface 511 of the flange portion 51 of the coil bobbin 50
A recess D4 portion 52 is formed in the inner end surface 511 to insert the wire end 53 into the recess groove 52 and to prevent the wire end 53 from coming into contact with the winding portion.
Adhesive tape 54 was attached to cover the area.

On the other hand, in the manufacturing method, especially in the winding process, the coil bobbin 50
At the same time, for example, the end of the wire end 53 at the beginning of winding is fixed by wrapping it around a stop pin provided on the jig, and after winding the wire around the bobbin main body 55, the end of the wire end 53 is fixed. The end was cut off. The wire end 53 after being cut is wound around a predetermined connection pin and fixed by soldering.

Incidentally, in recent years, audio equipment, office automation equipment, etc. are required to be smaller and lower in cost, and at the same time, higher quality and higher performance are also required.

=4- However, the conventional coil bobbin and coil manufacturing method described above involves manual labor in the manufacturing process, resulting in poor assembly, increased manufacturing man-hours, and manufacturing costs, and is difficult to automate, making mass production impossible. Moreover, there were problems in that the insulation performance was low and the quality was unreliable and deteriorated.

[Means for solving problems]

The present invention aims to provide a coil bobbin and a coil manufacturing method that solve the problems existing in the prior art described above, and is achieved by the coil bobbin l and coil manufacturing method shown below.

That is, the coil bobbin I according to the present invention has a flange portion 3 provided at the end of the bobbin body portion 2, from the inner end surface 31 to the peripheral surface 3s.
By forming a notch 4 that is offset in at least the circumferential direction and has a cut 4c that extends to the cut 4c, an isolation piece 7 is provided that insulates the wire terminal 5p inserted into the notch 4 from the winding part 6. It is characterized by In addition, the peripheral surface of the flange portion 3,
3s, a notch 8 extending from the notch 4 to the inner end surface 31 is formed as necessary, and a locking part 9 is formed to lock the wire end 5p.
In addition, a binding pin 12 that can bind and remove the wire terminal 5p can be provided.

Further, the coil manufacturing method according to the present invention utilizes the coil bobbin 1 mentioned above, and at the beginning of winding the wire 5, the wire end 5 is attached to the binding pin 12 provided in advance on the periphery of the flange portion 3.
P is tied together to form a ring 5r, and then tied pin 12
The ring 5r extracted from the coil is inserted into the connecting pin 14 and connected, and on the other hand, at the end of the winding, a ring 5s is similarly formed using the binding pin 13 and connected to the connecting pin 15. It is a feature.

Note that the guide pin I O (l ], ) guides the wire terminal 5p (5q) with respect to the binding pin 1.2 (1, 3).
can be provided.

[For production]

Next, the operation of the present invention will be explained.

Since the coil bobbin 1 is provided with the isolation piece 7 directly on the flange portion 3, the wire terminal 5p is isolated from the winding portion 6 by simply inserting it into the notch portion 4, and is insulated at the same time. In addition, since the wire terminal 5p is tied and fixed to the tie pin 10 in advance,
It is held within the notch 4.

On the other hand, a coil can be manufactured using the coil bobbin l.

At the beginning of winding the wire 5, the wire end 5p is tied and fixed to the tie pin 12 in advance. After hanging it on the guide pin 10, it is inserted into the notch 4. Next, the process moves to the winding process. At the end of the same process, if the guide pin IO is broken and removed, the wire terminal 5p is loosened, and as a result, the binding pin 1
2 can be removed, and at the same time a ring 5r can be formed by the wire ends 5p.

Therefore, this ring 5r can be inserted into the connecting pin 14 for connection. Note that the same process can be performed at the end of winding the wire 5.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

First, the structure of the coil bobbin 1 will be explained with reference to FIGS. 1 to 4.

The coil bobbin 1 includes a cylindrical bobbin main body part 2 and flange parts 3 and 20 integrally provided at both ends of the bobbin body part 2, both of which can be made of synthetic resin.

One flange portion 3 is formed into a rectangular shape having a predetermined thickness, and has an inner end surface 31, an outer end surface 3o, and a peripheral edge surface 3S. The inner end surface 31 is formed with a cut 4C into which the wire terminal 5p at the beginning of winding from the bobbin main body 2 side can be inserted, and this cut 4c extends from a position on the inner end surface 31 in contact with the bobbin main body 2 to a midway position on the peripheral edge surface 3s. reach. Further, a notch 4 is formed in the flange portion 3 by further cutting along the circumferential direction from the end of the cut 4c located on the peripheral edge surface 3s, thereby connecting the notch 4 and the bobbin body 2. Winding part 6 to be wound
A separating piece 7 formed by a part of the flange part 3 between
will be established. Furthermore, a notch 8 extending from the notch 4 to the inner end surface 31 is formed, and a locking portion 9 to which the wire end 5p is locked is provided.

Therefore, the wire terminal 5p at the beginning of winding can be inserted into the notch 4 through the cut 4c, locked by the locking part 9, and pulled out from the notch 8 toward the inner end surface 31 side, and the wire terminal 5p can be inserted into the notch 4 through the cut 4c.
This allows for isolation from the winding portion 6 as well as open insulation.

On the other hand, on the peripheral surface 3S of the flange portion 3, a total of four cylindrical pins are integrally formed at predetermined intervals in the circumferential direction, and are selected to have a thickness and length that can be easily broken and removed. do. The two inner pins are tie pins 12 and I3,
In addition, the two pins provided on both sides are guide pins 10.1
It is 1.

Next, a method of manufacturing a coil using such a coil bobbin 1 will be described with reference to FIGS. 5 to 8.

First, as shown in FIG. 5, the wire end 5p at the beginning of winding of the wire 5 is tied and fixed a plurality of times around the tie pin 12 on the side where the notch 4 is provided. On the other hand, the wire end 5p is hung on the guide pin 10 and further inserted into the notch 4 through the cut 4c to reach the circumferential surface of the bobbin body 2. Then, by sequentially winding the wire 5 around the bobbin main body 2, a winding portion 6 can be created. (See Fig. 6) When the winding part 6 is completed, as shown in Fig. 6, the wire end 5q of the wire 5 at the end of winding is hung on the other guide pin II, and then tied on the other binding pin 13 several times. and then cut the wire 5 at the end. Two lead wires 21 and 22 are secured to the outer periphery of the winding portion 6 with tape 23 as shown in FIG. At the tip of each lead wire 21, 22, the covering portion is removed by a predetermined width to expose the internal core wire, and solder is applied to form a single-wire connecting pin 14, 15.

The connecting pins 14, 15 are bent outward into an L shape.

On the other hand, on the wire end side, as shown in FIG. 7, the guide pin 1O is broken and removed. As a result, the wire terminal 5
p is loosened, and the tied wire terminal 5p can be easily pulled out from the tied pin I2. Since this twisted wire terminal is formed into a ring 5r, it can be directly inserted into the connecting pin I4 of the lead wire 21 and fixed by soldering, as shown in FIG. At this time, the wire end 5p passes through the notch 4,
Pull it out from the notch 8. Note that the other wire terminal 5q is similarly processed and connected to the connection pin l5 of the other lead wire 22. Then, each wire terminal 5p, 5q is connected to each lead wire 2.
Once connected to 1.22, break the binding pin 12.13 and remove it. Therefore, the manufacturing of the coil is completed, and all four pins IO to 13 are removed from the flange portion 3.

Note that all of these manufacturing processes can be performed by automatic machines.

Although Example 1-1 has been described in detail below, the present invention is not limited to such Example.

For example, the cut portion may be formed by cutting diagonally from the inner end surface of the flange portion. Further, a locking portion and a guide pin can be provided as necessary. Other changes may be made in the configuration, shape, quantity, etc., without departing from the gist of the present invention.

〔Effect of the invention〕

As described above, the present invention configures a coil bobbin by integrally providing a separating piece or a binding pin on the flange portion, and
Since the coil is manufactured using this coil bobbin, the following significant effects are obtained.

■ When manufacturing coils, manual work is no longer required in steps 1-2, and complete automation can be achieved. As a result, significant cost reductions due to labor savings and mass production can be achieved.

■ Insulation performance is greatly improved and highly reliable coils can be obtained, and the quality of coils can be improved and quality uniformized.

■ The coil bobbin is extremely easy to implement as there are only 5 steps required to change the mold.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of the coil bobbin according to the present invention; Fig. 2 is a front view showing a part of the inner end surface of the flange portion of the coil bobbin; Fig. 3 is a sectional view taken along line A and -A in Fig. 2; Fig. 4 FIG. 3 is a sectional view taken along the line B-B in FIG. 3; FIGS. 5 to 8 are partial views of the coil showing each step of the coil manufacturing method; and FIG. 9 is a partial perspective view of the flantz portion of a conventional coil bobbin. In the drawings, 1: Coil bobbin 2: Bobbin main body 3 Flange portion 31: Inner end surface 3s: Peripheral surface 4 Notch 4C cut 5 Wire 5s/Wire end 69 Winding portion 7: Isolation piece 8/Notch

Claims (1)

[Scope of Claims] [1] In a coil bobbin having a flange portion provided at the end of the bobbin main body, the flange portion has a cut extending from the inner end surface to the peripheral surface, and is cut at least offset in the circumferential direction. A coil bobbin characterized in that an isolating piece is provided to insulate a wire end inserted into a notch from a winding part by forming a part therein. [2] Claim 1, characterized in that a notch extending from the notch to the inner end surface is formed on the peripheral surface of the flange portion, and a locking portion is provided for locking the end of the wire inserted into the notch. Coil bobbin as described. [3] A claim characterized in that a tying pin is provided on the peripheral surface of the flange portion to be able to tangle the wire end inserted into the notch and to remove the tangled wire end. 2. The coil bobbin according to 1 or 2. [4] A guide pin is provided on the peripheral surface of the flange portion, on which the end of the wire from the notch to the tie pin can be hung, and the wire end can be loosened by being broken and removed. The coil bobbin according to claim 3. [5] In a coil bobbin in which a flange is provided at the end of the bobbin body, a tying pin is provided around the periphery of the flange to which a wire end can be tangled and the tangled wire end can be pulled out. A coil bobbin characterized by: [6] The coil bobbin according to claim 5, wherein the binding pin is formed so that it can be broken and removed. [7] A guide pin is provided on the periphery of the flange portion, on which the wire end from the bobbin main body side to the binding pin can be hung, and the wire end can be loosened by being broken and removed. The coil bobbin according to claim 5 or 6. [8] A binding pin is provided in advance around the periphery of the flange portion of the coil bobbin, and at the beginning or end of winding the coil, the end of the wire is tied to the binding pin to form a ring, and then the wire is pulled out from the binding pin. A coil manufacturing method characterized by connecting a wire terminal and a connecting pin by inserting a ring into the connecting pin. [9] The coil manufacturing method according to claim 8, wherein the binding pin is broken and removed after the ring is removed. [10] A guide pin is provided on the periphery of the flange portion, and the wire end is hung on the guide pin and then tied around the binding pin, and when removing the ring, the guide pin is broken and removed, and the wire end is loosened. The coil manufacturing method according to claim 8 or 9, characterized in that: