JPH0765904A - Noise filter - Google Patents

Abstract

PURPOSE:To provide a noise filter easy to assemble. CONSTITUTION:A housing is provided and partitioned into a terminal chamber 12 and capacitor chamber 14 by a partitioning wall 11. To assemble a terminal piece 4 and capacitor 5 at the housing 1, the terminal piece 4 is intruded into the terminal chamber 12, and a mounting hole 46 in the piece 4 is fitted on a mounting boss 20, and a connecting piece 44 is inserted through an insert hole 22. Then a mounting cover 2 is put on. The capacitor 5 is installed in the chamber 14, and the tip of a lead 5a is attached by solder 51 to a mounting part 44a provided at the tip of the connecting piece 44. The capacitor chamber 14 is filled with a filler F, and the capacitor 5 is embedded fast. Thus a noise filter is accomplished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise filter provided between a power source and equipment.

[0002]

2. Description of the Related Art A noise filter in which a capacitor is interposed between a power source and a device is known as a means for mitigating noise generated from a device such as a computer. No. 187170. This conventional noise filter is shown in FIG.
As shown in FIG.
Further, the end of the electric wire c is crimped to the other side so that it can be connected to the power source and the device. A capacitor d is fixed on the plate surface of the core a, and a lead e of the capacitor d is welded to the terminal fitting b. The core assembly configured as described above is inserted from the rear opening of the housing f along the guide g, and the terminal fitting b penetrates the partition wall h and inside the fitting portion i on the front surface as shown in FIG. It has a structure in which an insulative filling material j made of epoxy resin is filled around the core assembly while protruding.

[0003]

However, it is necessary to provide the core a of this conventional noise filter with the terminal fitting b, the crimping portion of the electric wire c, the locking portion of the capacitor d, the connection terminal with the lead e, and the like. However, it has been necessary to assemble them into such a complicated core a to form a core assembly, and then house the core assembly in the housing f. Further, since the filling material j is filled after the core assembly is housed, there is a problem to be solved that the filling material j is not sufficiently filled in the housing f. Further, for these reasons, it is difficult to automate the assembly of the noise filter. Therefore, the object of the present invention is to provide a noise filter that is easy to assemble.

[0004]

Therefore, in the invention of claim 1, the housing accommodates the terminal accommodating chamber for accommodating the terminal fittings having the terminals connected to the power source side and the device side, and the capacitor. A capacitor accommodating chamber is defined by a partition wall, and the terminal fitting is provided with a connecting piece branching through the partition wall and extending into the capacitor accommodating chamber, and the connecting piece and the capacitor are connected to each other. There is.

[0005]

According to the first aspect of the invention, the housing is provided with the terminal accommodating chamber and the capacitor accommodating chamber which are partitioned by partition walls. To assemble the noise filter by assembling the terminal fitting and the capacitor in this housing, first, the terminal fitting is housed in the terminal housing chamber. At this time, the connection piece branched from the terminal fitting penetrates the partition wall and is arranged in the capacitor accommodating chamber. Next, the capacitor is housed in the capacitor housing chamber, and the capacitor is connected to this connecting piece. This completes the assembly process of the noise filter.

According to the second aspect of the invention, the filling material is filled in the capacitor housing chamber. As a result, the condenser is firmly fixed in the condenser accommodating chamber. At this time, since the capacitor and the connecting piece are merely accommodated in the connector accommodating chamber, the filling material is easily and sufficiently filled, and defects such as defective filling are unlikely to occur.

According to the third aspect of the invention, since the electric wires on the power source side and the device side can be connected by the connector, the connecting work can be easily performed.

[0008]

According to the present invention, a terminal accommodating chamber for accommodating a terminal fitting having a terminal connected to a power source side and a terminal accommodating chamber for accommodating a device and a capacitor accommodating chamber for accommodating a capacitor are formed by partition walls. Since the connection piece is formed by partitioning and penetrates the partition chamber and is branched from the terminal fitting in the capacitor accommodating chamber, a noise filter having a simple structure can be obtained and the assembling process thereof can be facilitated. be able to.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the noise filter of this embodiment has a housing body 1 and a housing body 1.
The mounting cover 2 is attached to the housing main body 1, and two members of the + and − side terminal fittings 4 and 4 housed in the housing body 1 and a capacitor 5 having leads 5a are provided.

First, the terminal fitting 4 built in the housing main body 1 will be described. The terminal fitting 4 is formed by bending a conductive thin plate, and the left and right of the step portion 41 bent in a step shape. A tongue-shaped male terminal 42 and a tubular female terminal 43 are provided on both sides. The plate-shaped mounting portion 4 extends from the base of the female terminal 43 to the step 41.
5, the mounting portion 45 is provided with a mounting hole 46 formed of a long hole. Also, the female terminal 43
A connecting piece 44 branched from the side and bent at the step portion 41 is projected at a right angle, and a bifurcated mounting portion 44a connected to the lead 5a is provided at the tip thereof.

As shown in FIG. 2, the housing main body 1 is partitioned by a partition wall 11 that divides the front and rear into substantially two parts. The terminal housing chamber 12 having a mounting opening 13 is formed on the rear side, and the mounting opening 15 is formed on the front side. The capacitor accommodating chamber 14 in which the above is formed is partitioned and formed. In the mounting opening 13 of the terminal accommodating chamber 12, the mounting cover 2 is covered and two terminal fittings 4 and 4 are mounted in parallel.

The terminal accommodating chamber 12 is defined by a sandwiching portion 16 for sandwiching the mounting portion 45 of the terminal fitting 4 with the mounting cover 2, and a female terminal accommodating hole 17 for accommodating the female terminal 43 on the left side. A male terminal 42 is provided on the right side so as to project into a fitting hole 18 into which a female connector (not shown) is fitted. The outer surface of the housing body 1 in which the female terminal accommodating hole 17 is provided has a substantially rectangular cross section, and is fitted into the fitting hole of a male connector (not shown) provided at the end of the connecting wire connected to the noise filter. Is being done. Then, the elastic lock piece 1 provided on the upper part of the housing body 1
It is adapted to be engaged with this male connector (not shown) by 9 (see FIG. 1). Further, a mounting protrusion 20 is formed on the holding body 16 so as to project from the housing body 1, and the above-described mounting hole 46 of the terminal fitting 4 is fitted and positioned. Further, the terminal 4 is held by the holding portion 16 to fit the female terminal 43 into the female terminal accommodating hole 17, and the base of the male terminal 42 is attached to the mounting cover 2.
It is clamped by a pressing piece 21 protruding from the fitting hole 1
8 is arranged so as to project. As described above, in the terminal accommodating chamber 12, the male terminals 42 and the female terminals 43 are arranged on the left and right, respectively, so that they can be connected to the power source side and the device side (not shown).

The capacitor accommodating chamber 14 has a box-like shape with the partition wall 11 as the bottom surface and the top surface open. The partition wall 11 is provided with an insertion hole 22 which communicates with the terminal accommodating chamber 12, and the connection piece 44 of the terminal fitting 4 described above is arranged so as to project from the insertion hole 22. Then, the tips of the leads 5a protruding from both sides of the accommodated capacitor 5 are welded to the mounting portion 44a formed at the tip of the connecting piece 44 by the solder 51, and the capacitor 5 is accommodated in the capacitor accommodating chamber 14. There is. Further, the capacitor housing chamber 14 is filled with an insulative filling material F made of an epoxy resin to firmly fix the capacitor 5.

Next, the process of assembling the noise filter of this embodiment will be described with reference to FIGS. As shown in FIG. 3, the two terminal fittings 4 are vertically aligned and housed in the terminal housing chamber 12 through the mounting openings 13. At this time, the mounting protrusion 20
The mounting hole 46 is fitted into the mounting hole 46 and the connection piece 44 is inserted into the insertion hole 22 for positioning. That is, by pushing the terminal fitting 4 into the terminal accommodating chamber 12,
The terminal fitting 4 can be attached. Next, the mounting cover 2 is mounted by engaging the engaging protrusions 2a provided on the left and right edges with the rim of the mounting opening 13. The mounting portion 45 is sandwiched by the inner surface of the mounted mounting cover 2, and the base portion of the male terminal 42 is pressed by the pressing piece 21, and the male terminal 42 is disposed so as to project into the fitting hole 18. .

Subsequently, as shown in FIG. 4, the capacitor 5 is housed in the capacitor accommodating chamber 14, and the tip of the lead 5a thereof is sandwiched by the forked mounting portion 44a provided at the tip of the connecting piece 44 and soldered. Weld by 51. Then, FIG.
As shown in FIG. 5, the filling material F is filled in the capacitor housing chamber 14, the capacitor 5 is buried in the filling material F, and firmly fixed after the solidification time has elapsed. Through the above steps, the assembly of this noise filter is completed. As described above, all the assembling steps of this embodiment are simple, so that they can be easily assembled and can be automated.

In this embodiment, the male terminal 42 and the female terminal 43 arranged on both sides of the terminal fitting 4 are
Since each is made into a connector, it can be easily connected between the power supply and the device.

Further, in this embodiment, since the capacitor housing chamber 14 has a simple structure in which the capacitor 5 is housed and the connecting piece 44 connected to the capacitor 5 is projected, defects such as improper filling occur. No filling can be done easily. As a result, the capacitor 5 is securely fixed in the capacitor accommodating chamber 14, and a noise filter that does not cause contact failure with the solder 51 even when mounted on a place susceptible to vibration, for example, an automobile can be provided.

Although this embodiment shows an example in which the capacitor 5 is fixed by the filler F, it is not always necessary to fix the capacitor 5 by the filler, and other means, for example, the opening of the capacitor accommodating chamber 14 is used. It is also possible to provide a pressing cover for covering the capacitor 5 and sandwich and fix the capacitor 5 between the pressing cover and the partition wall 11.

Further, in this embodiment, the male terminal 42, the female terminal 43 and the connecting piece 4 are provided on both sides of the terminal fitting 4.
4 is integrated, but it can be implemented separately by changing it according to the connection terminals on the power supply side and the device side, such as making it a separate object or making it a male / male terminal or a female / female terminal. .

Further, in this embodiment, the noise filter is connected to both the power source side and the device side by the connector, but one of the terminals is a crimp terminal for directly crimping the end of the electric wire. Modifications can be made without departing from the spirit of the invention.

[Brief description of drawings]

FIG. 1 is an exploded perspective view.

FIG. 2 is a plan sectional view.

FIG. 3 is a plan sectional view of a state before accommodating a capacitor.

FIG. 4 is a plan sectional view showing a state in which a capacitor is attached.

FIG. 5 is a cross-sectional view of a conventional example.

FIG. 6 is an exploded perspective view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing main body 4 ... Terminal metal fitting 5 ... Capacitor 5a ... Lead 11 ... Compartment wall 12 ... Terminal accommodating chamber 14 ... Capacitor accommodating chamber 22 ... Insertion hole 42 ... Male terminal 43 ... Female terminal 44 ... Connecting piece F ... Filling material

Claims (3)

[Claims] 1. A terminal accommodating chamber for accommodating a terminal fitting having a terminal connected to a power supply side and a terminal accommodating a device and a capacitor accommodating chamber for accommodating a capacitor are formed in the housing by partition walls. The terminal filter is provided with a connecting piece branching through the partition wall and extending into the capacitor housing chamber, and the connecting piece and the capacitor are connected to each other. 2. The noise filter according to claim 1, wherein the capacitor is fixed by an insulative filling material filled in the capacitor housing chamber. 3. The noise filter according to claim 1, wherein the terminals of the terminal fittings can be connected by electric wires and connectors on the power source side and the device side, respectively.