JPH0629135A - Coil bobbin - Google Patents

Abstract

PURPOSE:To obtain a coil bobbin which can prevents a terminal mounted to a terminal block form being loose. CONSTITUTION:A plurality of terminal mounting holes 19 are provided at a terminal block 15 of a coil bobbin main body. one edge part where an elastically deformable lock piece 17 of each terminal fitment 12 is cut and raised is inserted into the mounting holes 19, and then the terminal block 15 is mounted to the terminal 12. A recess 20 positioned corresponding to the layout of the lock piece 17 inserted into the terminal mounting hole 19 is formed at the terminal block 15 and at the same time an engagement thin film 21 is provided in one piece with the terminal block 15 between the recess 20 and the terminal mounting hole 19. The engagement thin film 21 screens the recess 20 and the mounting hole 19 and at the same time is pressed to the gear-lock piece 17, thus deforming the lock piece 17 elastically and hence pressing one edge part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil bobbin used in an electromagnetic device such as a discharge lamp ballast and having a plurality of terminal fittings mounted side by side on a coil bobbin main body.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing an overall structure of a conventional coil bobbin fitted and attached to an iron core of a discharge lamp ballast. In this coil bobbin, terminal blocks 3 are integrally formed on end flanges 2 provided at both axial ends of a coil bobbin main body 1 formed in a rectangular tube shape, and a plurality of terminal fittings 4 are arranged on the terminal blocks 3. It is installed.

The mounting structure of the terminal fitting 4 is shown in FIG. That is, the terminal block 3 is provided with a number of terminal fitting mounting holes 5 corresponding to the terminal fittings 4, and a plurality of hook-through holes 6 that are continuous to the mounting holes 5 at right angles. Then, the terminal fitting 4 has a hook 7 that is cut and raised diagonally.
It is attached by inserting one end portion having the above into the terminal fitting attachment hole 5.

In this installation, the latching piece 7 is pushed down and inserted into the terminal mounting hole 5, and the latching piece 7
When the whole reaches the hooking through hole 6, it rises due to its elastic deformation and gets caught in the hooking through hole 6. Thereby,
The terminal fitting 4 is prevented from coming off and can be attached to the terminal block 3.

The terminal fitting 4 mounted as described above
An external lead wire (not shown) is connected to the other end of the coil terminal connecting piece 8 that is obliquely cut and raised to the other end, and the coil 9 attached to the coil bobbin body 1 (see FIG. 5). (See) The terminal part is designed to be wrapped around. The winding of the end portion of the coil 9 around the coil end connecting piece 8 is performed by an automatic winding machine, and at the end of the winding, the coil wire is cut using the edge of the coil end connecting piece 8. Has become.

[0006]

By the way, the terminal fitting 4
In order to facilitate the insertion of the terminal fitting 3 into the terminal base 3, the terminal fitting mounting hole 5 is formed to be larger than one end of the terminal fitting 4 to be inserted therein. Therefore, a gap G is unavoidably provided between the terminal fitting mounting hole 5 and one end of the terminal fitting 4 inserted therein, as shown in FIG.
As a result, the terminal fitting 4 rattled up, down, left and right, and its mounting position could not be determined.

Therefore, the insulation distance between the adjacent terminal fittings 4 may be narrowed, and the electrical insulation between them may be impaired. Moreover, when the automatic winding machine uses the edge of the coil end connecting piece 8 to cut the coil wire,
Since the terminal fitting 4 rattles and shifts from the proper position, the direction of the edge with respect to the coil changes, and it becomes difficult to cut the coil wire at this edge, which causes an abnormal load on the coil terminal connecting piece 8. There is a problem that the lever connecting piece 8 may be deformed, or the coil wire may largely protrude from the coil end connecting piece 18 and be cut.

It is an object of the present invention to obtain a coil bobbin which can prevent rattling of a terminal fitting attached to a terminal block.

[0009]

According to the present invention, a terminal block having a plurality of terminal fitting mounting holes arranged in parallel is integrally molded in a coil bobbin body, and a hooking piece is obliquely cut and raised at one end, and A plurality of terminal fittings formed by cutting and raising a coil end connecting piece around which a terminal end of a coil attached to a coil bobbin main body is wound to the other end side, and inserting the one end into the terminal fitting mounting hole to insert the terminal block. Applies to coil bobbins mounted on. Then, in order to achieve the above object, a recess is formed in the terminal block, the recess being positioned corresponding to the arrangement of the hooking piece inserted into the terminal fitting mounting hole, and the recess and the terminal fitting mounting hole. In the meantime, there is provided a thin film for partitioning these and for the above-mentioned locking piece to be pressed and engaged by its elasticity.

[0010]

In the structure of the coil bobbin, the engaging thin film swells toward the opening side of the recess by the elastic force of the engaging piece provided at the one end of the terminal fitting when the one end of the terminal fitting is inserted into the terminal fitting mounting hole. As described above, the one end portion is pressed against the hole surface on the side opposite to the recess of the terminal fitting mounting hole through the hooking piece, and the hooking piece is elastically deformed and pinched between the hole surface and the hole surface. Further, the retaining piece of the terminal fitting is caught on the deformed retaining thin film to prevent the terminal fitting from coming out.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 4 is a perspective view showing an entire coil bobbin that is used by being fitted to a central leg iron core of a discharge lamp ballast included in a fluorescent lamp lighting fixture. This bobbin is a synthetic product in which glass powder is mixed, for example, 30% by weight. Resin (urethane resin)
A plurality of terminal fittings 12 are formed in parallel at both ends of the coil bobbin main body 11 which is an integrally molded product.

In the coil bobbin main body 11, end flanges 13 are respectively provided at both ends of a square tubular portion fitted to the outside of the central leg iron core, and a pair of intermediate flanges 14 are integrally provided outside at the center portion in the longitudinal direction. The terminal block 15 is formed so as to project, and a terminal block 15 is integrally provided on one piece of the end flange 13 so as to project outwardly in the longitudinal direction of the coil bobbin main body 11. A coil 16 composed of a coil wire wound around a portion between the end flange 13 and the intermediate flange 14 is attached to the coil bobbin main body 11.

The strip-shaped terminal fittings 12 arranged side by side on the terminal block 15 have, as shown in FIGS. 1 to 3, elastically deformable hooking pieces 17 that are obliquely cut and raised at one end, and It has a coil end connecting piece 18 that is obliquely cut and raised on the other end side. An end portion of the coil 16 wound around the coil bobbin main body 11 is automatically wound around the coil terminal connecting piece 18 by an automatic winding machine, and when the winding is completed, the coil wire forming the terminal portion is a coil terminal connecting piece. It is designed to be cut using 18 edges. An external lead wire (not shown) is attached to the other end of the terminal fitting 12 by soldering or the like, so that the external lead wire and the coil 16 are electrically connected via the terminal fitting 12. .

A plurality of terminal fitting mounting holes 19 into which these terminal fittings 12 are inserted by an automatic machine are provided in the terminal block 15 at regular intervals. These mounting holes 19
Has a depth A capable of accommodating one end portion having the hooking piece 17 of the terminal fitting 12 as shown in FIG. Further, the terminal fitting mounting hole 19 has a width C slightly larger than the width B of the terminal fitting 12 as shown in FIG. 2, and the thickness D of the terminal fitting 2 as shown in FIGS. 2 and 3. It is formed to have a height F which is slightly larger and smaller than the rising height E of the hooking piece 17.

The terminal block 15 is provided with the same number of recesses 20 as the terminal fitting mounting holes 19. These recesses 20 are respectively provided at the positions corresponding to the arrangement of the hooking pieces 17 inserted into the terminal fitting mounting holes 19, and the engaging thin film 21 for partitioning these between the recess 20 and the terminal fitting mounting holes 19.
(See FIGS. 1 to 3) are formed. The recess 20 has a quadrangular shape with a length of 2 mm and a width of 2 mm, and the engaging thin film 21 forming the bottom thereof has a thickness of 0.2 mm.

As shown in FIG. 3, the terminal fitting 12 is inserted into the terminal fitting mounting hole 19 from the direction of the arrow in FIG. 3 by an automatic machine, with one end having the hooking piece 17 first. In this insertion, the terminal metal fitting 12 has a margin based on the dimensional relationship between the terminal metal fitting 12 and the terminal metal fitting mounting hole 19.
Can be easily inserted into the terminal fitting mounting hole 19.

In this case, the insertion into the terminal mounting hole 19 is advanced while the hooking piece 17 is pushed down, and the insertion is stopped when the whole hooking piece 17 reaches the position where the engaging thin film 21 exists. . Then, the latching piece 17 is dented by the elastic deformation of the latching thin film 21 having a smaller strength than the others.
While being deformed so as to bulge toward the opening side of 0, it rises and presses against the deformed retaining thin film 21 to be caught. Therefore, the terminal fitting 12 can be prevented from coming out. This state is shown in FIG.

Moreover, with the hooking piece 17 elastically deformed, the hole surface 1 on the side opposite to the recess 20 of the terminal fitting mounting hole 19 is formed.
Since it is sandwiched between 9a and the engaging thin film 21, the engaging piece 1
The one end of the terminal fitting 12 is pressed against the hole surface 19a via the contact hole 7.

Therefore, the terminal fitting 12 can be fixed to the terminal block 15 without rattling in the vertical and horizontal directions. Therefore, there is no fear that the insulation distance between the adjacent terminal fittings 12 becomes narrow. Further, since the terminal fitting 12 is firmly fixed as described above, when the coil end is automatically wound around the coil end connecting piece 18, the terminal fitting 12 has a clearance between it and the terminal fitting mounting hole 19. Despite the fact that the coil terminal does not deviate from the predetermined position, the coil terminal is prevented from being cut at an improper position and the coil terminal connecting piece 18 is prevented from being deformed, and the coil terminal is properly wound around the coil terminal connecting piece 18. Can be cut.

The present invention is not limited to the above-mentioned one embodiment, and the present invention can be applied to various coil bobbins as long as the coil bobbins are fitted with terminal fittings. Further, the recess 20 may be provided so as to extend continuously along the width direction of the terminal block 15.

[0021]

As described above in detail, in the coil bobbin of the present invention, one end portion of the terminal fitting inserted into the terminal fitting mounting hole forms a hooking thin film with elastic deformation of the hooking piece provided therein. Since the terminal fitting mounting hole is configured so as to be sandwiched between the recess and the opposite hole surface to prevent the terminal fitting from coming off, there is an effect that rattling of the terminal fitting can be prevented. Therefore,
It is possible to prevent the insulation distance between the adjacent terminal fittings from becoming narrow, and to prevent the coil terminal from being cut at an inappropriate position and the coil terminal connecting piece from being deformed due to automatic winding of the coil terminal around the coil terminal connecting piece.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of a terminal metal fitting mounting portion of a coil bobbin according to an embodiment of the present invention.

FIG. 2 shows the terminal metal fitting mounting portion shown in FIG.
-A sectional view taken along the line Z.

FIG. 3 is a cross-sectional view showing the terminal fitting according to the embodiment and a terminal block before the fitting is separated from each other.

FIG. 4 is a perspective view showing the entire coil bobbin according to the embodiment.

FIG. 5 is a perspective view showing an entire coil bobbin according to a conventional example.

FIG. 6 is a cross-sectional view showing a configuration of a terminal metal fitting mounting portion of a coil bobbin according to the conventional example.

[Explanation of Codes] 11 ... Coil bobbin main body, 12 ... Terminal fitting, 15 ... Terminal block, 16 ... Coil, 17 ... Latching piece, 18 ... Coil terminal connecting piece, 19 ... Terminal fitting mounting hole, 19a ... Hole surface, 20 …
Recess, 21 ... Engagement thin film.

Claims (1)

[Claims] 1. A terminal block having a plurality of terminal fitting mounting holes arranged side by side in a coil bobbin body is integrally formed, and a hooking piece is obliquely cut and raised at one end of the coil bobbin body. A plurality of terminal fittings formed by cutting and raising a coil terminal connecting piece around which the terminal portion is wound to the other end side, in a coil bobbin attached to the terminal block by inserting the one end into the terminal fitting mounting hole, The terminal block is formed with a recess positioned corresponding to the arrangement of the hooking piece inserted into the terminal fitting mounting hole, and the hooking piece is partitioned between the recess and the terminal fitting mounting hole. The coil bobbin is characterized in that an engaging thin film which is pressed and engaged by its elasticity is provided.