JPH1197116A - Insertion plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the risk of a noise filter element being moved by the pressure of a filling mold resin by introducing such an arrangement that the whole noise filter element is surrounded by a case member. SOLUTION: A first case member 51 is equipped with undersurface holding plates 53 and 53 to hold the undersurface of a noise filter element 4, a peripheral surface holding wall 52 to hold the peripheral surface of the noise filter element 4, and lock pawls 54a and 54a to be locked by a second case member 61, wherein the second case member 61 is equipped with a top wall 65 and arm plates 66 and 66 to hold the oversurface of the noise filter element 4 accommodated in the first case member 51 and locking holes 64a and 64a to be locked by the pawls 54a and 54a furnished on the first case member 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise filter element connected between a plug terminal and a cord, and a connection between the noise filter element and the plug terminal and a connection between the cord are held by a case member. In this state, the present invention relates to an insertion plug having a structure in which the entire body including the case member is integrally molded with a resin forming the plug main body, and more specifically, a noise filter element which can occur when the plug main body is integrally formed and a connection portion thereof. The present invention relates to an insertion plug having a structure capable of preventing movement of a plug.

[0002]

2. Description of the Related Art A conventional plug having a built-in noise filter element merely accommodates the noise filter element in a case member. Therefore, when the entire body including the case member is integrally molded with the resin forming the plug main body, the noise filter element moves due to the pressure of the filled molding resin, and the coil portion of the noise filter element and the like from the plug main body. There was a problem that it was exposed.

In order to solve such a problem, plugs having various structures have been proposed.

[0004] For example, a plug with a built-in noise filter described in Japanese Patent Application Laid-Open No. 2-10674 is composed of a magnetic core wound with a coil having one end connected to a wire core and the other end connected to a plug terminal. A noise filter mounting member holding a noise filter element and integrally forming a code holding portion connected to the holding portion, and a base having a bridge portion to which a plug terminal is fixed and mounting the noise filter mounting member And a base member having positioning means for assembling the noise filter assembling member at a fixed position on the base portion (this is referred to as Conventional Technique 1).

The plug described in Japanese Utility Model Laid-Open Publication No. 1-81880 accommodates a noise filter element holding portion for holding a noise filter element, and a connecting portion between a code side lead terminal of the noise filter element and a code conductor. The noise filter element includes a core having a center hole formed therein, and includes an integral fixing member including a connecting portion housing portion and an insulating base for fixing a rear portion of the plug terminal while giving a predetermined spacing dimension to the plug terminal. The filter element holding portion is configured to include a protrusion that is inserted into the center hole and fixes the noise filter element (this is referred to as Conventional Technique 2).

[0006]

However, according to the prior art 1, the noise filter element is simply accommodated in a base member whose one side is open, and the fixed portion is a plug terminal. And the noise filter element and the connection between the cord and the noise filter element. Therefore, when integrally molding with the resin forming the plug body, the pressure of the filled molding resin pushes the noise filter element upward in the base member, and a tensile load is applied to each connection part.
There is a problem that each connection may be damaged.
In addition, the problem that the coil portion of the noise filter element and the like are exposed from the plug body has not been sufficiently solved.

The prior art 2 has a structure in which the noise filter element is fixed by inserting a protrusion provided on the noise filter element holding portion into a center hole provided in the noise filter element. However, the specifications and shapes of the noise filter elements are limited, and there has been a problem that various noise filter elements cannot be held by the same noise filter element holding section.

Further, in each of the prior art 1 and the prior art 2, since the upper part of the noise filter element is not covered with the base member or the insulating base, if the winding deflection of the noise filter element exists, it is eliminated. It cannot be held down, and in the worst case, there is a problem that a bent winding (coil) is exposed from the plug body.

The present invention has been made in order to solve such a problem. The object of the present invention is not to fix the noise filter element with a projecting body but to surround the upper, lower, left and right by a case member. By taking the shape, the movement of the noise filter element due to the pressure of the mold resin to be filled can be eliminated, and the bending of the winding can be suppressed,
Another object of the present invention is to provide an insertion plug having a structure capable of reliably holding noise filter elements having different shapes.

[0010]

In order to solve the above-mentioned problems, in the plug of the present invention, a noise filter element is connected between a plug terminal and a cord, and a connection portion between the noise filter element and the plug terminal and a cord are provided. In a state in which the connection portion is held by a case member, the entire plug including the case member is integrally molded with a resin forming the plug body, wherein the case member includes the noise filter element. And a first case member for holding the connection portion of the cord connected to the noise filter element, and for holding the plug terminal connected to the noise filter element, and the first case member And a second case member for holding the noise filter element accommodated in the first case.
A lower surface side holding portion that holds a lower surface side of the noise filter element, an outer peripheral surface holding portion that holds an outer peripheral surface of the noise filter element, and a locking portion that locks with the second case member. Wherein the second case member includes an upper surface side holding portion that holds an upper surface side of the noise filter element housed in the first case member, and the locking member provided on the first case member. And a locked portion for locking the first case member and the locked portion of the second case member to lock the lower portion of the noise filter element. In a state where the outer peripheral surface and the upper surface are respectively held by the lower surface side holding portion of the first case member, the outer peripheral surface holding portion, and the upper surface side holding portion of the second case member, the entirety including the case member is a plug body. Integrally with the resin forming It is those that have been Rudo.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a plug of the present invention,
FIG. 2 is a side view. However, FIGS. 1 and 2 show the plug body 9, the first case member 51, and the second case member 61 in a transparent manner for easy understanding of the internal structure.

The plug 1 has plug terminals 2 and
A noise filter element 4 is connected between the power supply 2 and the cord 3, and the connection points 2 b and 2 b between the noise filter element 4 and the plug terminals 2 and 2 and the connection between the noise filter element 4 and the cord 3 are provided. With the portion 3b held by the case member 5, the entire structure including the case member 5 is integrally molded with the resin forming the plug body 9.

The case member 5 accommodates the noise filter element 4 and holds a connection portion 3a of the cord 3 connected to the noise filter element 4.
And the plug terminals 2 connected to the noise filter element 4,
2 and a second case member 61 for holding the noise filter element 4 housed in the first case member 51.

FIG. 3 is an exploded plan view showing the first case member 51 and the second case member 61 before the plug body 9 is integrally formed, and FIG.
FIG. 5 is an exploded perspective view showing the first and second case members 61, the noise filter element 4, the plug terminals 2, 2, and the cord 3.
FIG. 7 is a cross-sectional view of the second case member 61.

The first case member 51 and the second case member 61 are each formed by injection molding using a thermosetting resin.

The first case member 51 is formed in a cylindrical shape to hold the outer peripheral surface of the noise filter element 4,
An outer peripheral surface holding wall 52 having a shape in which a central portion on a front end side is cut out with a predetermined width is provided. Lower side holding plates 53, 53 for holding the lower side of the
Are provided at right and left pairs at a predetermined interval.

Each end edge 52 of the outer peripheral surface holding wall 52 is also provided.
b, 52b, a pair of locking rods 54, 54 extending in parallel to the front are provided at regular intervals on the left and right outer peripheral surfaces near the locking rods 54, 52b. Engagement claws 54a, 54a are formed on the outer surface of the distal end of 54, respectively.

Further, the leading edge 52b of the outer peripheral surface holding wall 52,
In the vicinity of each of the noise filter elements 52b, distal ends 43a, 43a of insulated conductors (windings) 43, 43,
Insertion holes 55 for passing through 43a are formed, respectively.

On the outer peripheral surface on the rear end side of the outer peripheral surface holding wall 52, a cord separator 56 projecting rearward is formed at the center thereof. Cord connection terminal receiving portions 57, 57 are formed respectively. The cord connection terminal accommodating portion 57 is formed in a cylindrical shape, and has a shape in which a central portion on a rear end side is cut out with a predetermined width. Further, rear ends 43b, 43b of the insulated conductors 43, 43 of the noise filter element 4, which will be described later, are sandwiched between upper end edges 52c of the outer peripheral surface holding wall 52 at positions corresponding to the cord connection terminal receiving portions 57, 57. Cut grooves 58 are formed, respectively.

The second case member 61 has a base body 62 formed in a box shape having an open rear end, and an insulating base 63 at the front end of the base main body 62 is provided with a plug terminal 2. , 2 for inserting through holes 63
a, 63a are formed. In addition, locking holes 64a, 64a for locking the locking claws 54a of the locking rod 54 formed on the first case member 51 are formed in the left and right side walls 64, 64 of the base body 62. I have. The top wall 65 of the base body 62 serves as an upper surface holding plate that holds the upper surface side of the noise filter element 4 housed in the first case member 51 from above, and the left and right of the opening edge of the top wall 65. Arm plates 66, 66 extend rearward from both sides.
The central portion of the opening edge of the ceiling wall 65 is a cutout portion 65a cut out in a substantially semicircular arc shape toward the front, and the central portion on the upper surface side of the noise filter element 4 is located in the cutout portion 65a. It is supposed to.

The arm plates 68, 6 extend rearward from both left and right sides of the opening edge of the bottom wall 67 (see FIG. 5) of the base body 62.
8 is extended. The arm plates 68, 68 hold the lower surface side of the noise filter element 4 from below along with the lower surface side holding plates 53, 53 of the first case member 51. Further, a central portion of the opening edge of the bottom wall 67 is a cutout portion 67a cut out in a substantially semicircular arc shape toward the front,
The central part on the lower surface side of the noise filter element 4 is located in the notch 67a.

The noise filter element 4 is provided with an insulating cover 42 provided so as to cover an annular core 41 in order to prevent a short circuit between the two wires. Have been.

Next, a method of manufacturing the plug of the present invention using each member and each component having the above-described configuration will be described.

First, the noise filter element 4 is housed in the outer peripheral surface holding wall 52 of the first case member 51. At this time, the lower surface side of the noise filter element 4 is held by lower surface side holding plates 53, 53 formed on the lower end edge 52 a of the outer surface holding wall 52, and the outer surface is held by the outer surface holding wall 52. However, the outer peripheral surface of the noise filter element 4 does not necessarily need to contact the outer peripheral surface holding wall 52 of the first case member 51, and a slight gap may be left. In short, it suffices that the noise filter element 4 is regulated so that it hardly moves left and right.

Thereafter, the distal ends 43a, 43a of the insulated conductors 43, 43 of the noise filter element 4 are connected to the outer peripheral surface holding wall 5
Insertion holes 5 formed near the tip edges 52b, 52b
5, 55, and the rear ends 43 b, 43 b of the insulated conductors 43, 43 of the noise filter element 4 are cut into the cut grooves 58, formed in the rear end of the outer peripheral surface holding wall 52.
58 and is led out rearward. Then, the respective leading end portions 43a, 43a of the insulated conducting wires 43, 43 led out to the front side.
To the rear ends 2a, 2a of the plug terminals 2, 2, respectively, by soldering, etc.
3 and 43, and the respective conductors 3a, 43b, which are exposed by stripping the insulating coating of the leading end of the separated cord.
3a is connected by a crimp terminal (not shown). Then, connecting portions 3b, 3b between the rear ends 43b, 43b of the insulated conductors 43, 43 connected by the crimp terminals and the conductors 3a, 3a of the cord 3 are connected to the rear end side outer peripheral surface of the outer peripheral surface holding wall 52. Are accommodated in the cord connection terminal accommodating portions 57, 57 formed respectively. FIG. 3 shows this state.

Next, the plug terminals 2, 2 and the locking rods 54, 54 of the first case member 51 are inserted forward from the opening side of the second case member 61, and the plug terminals 2, 2 are inserted. Protruding forward through the insertion holes 63a, 63a formed in the insulating base 63, the locking claws 54a, 54a of the locking rods 54, 54 are fixed to the locking holes 64a, 64a formed in the left and right side walls 64, 64. To be locked. At this time, the tip portions 68a, 68a of the arm plates 68, 68 formed on the bottom wall 67 of the second case member 61 and the tip portions 53a, 53a of the arm plates 53, 53 of the first case member 51 are connected. It comes into contact.

That is, the locking claws 54 of the locking rods 54, 54
a, 54a are the right side walls 64 of the second case member 61,
When fitted into the locking holes 64a, 64a formed in the second case member 64, the tip portions 68a, 68a of the arm plates 68, 68 formed in the bottom wall 67 of the second case member 61, and the first case If the positional relationship between the arm plates 53, 53 of the member 51 is set such that the distal ends 53a, 53a of the members 51 come into contact with each other,
The first case member 51 and the second case member 61 are locked and fixed integrally without rattling.

At this time, the central portion on the upper surface side of the noise filter element 4 is located in the notch 65 a formed in the top wall 65, and the arm plates 66, 66 formed in the top wall 65 make the noise filter element 4. The upper surface is held from above. However, the arm plates 66, 66 do not necessarily need to contact the upper surface of the noise filter element 4, and may have a slight gap. In short, it suffices that the noise filter element 4 is regulated so that it hardly moves up and down.

That is, the outer peripheral surface of the noise filter element 4 is held by the outer peripheral surface holding wall 52 of the first case member 51 by locking and fixing the first case member 51 and the second case member 61. The lower surface of the noise filter element 4 is provided on the mask-side holding plates 53 of the first case member 51.
And the bottom wall 67 and the arm plates 68, 68 of the second case member 61.
And the upper surface of the noise filter element 4 is held by the top wall 65 and the arm plates 66, 66 of the second case member 61.

The case member 5 in which the first case member 51 and the second case member 61 are locked and fixed in this manner,
The plug body 9 is placed in a mold of an injection molding machine (not shown) and filled with resin to form a plug body 9. At this time, as described above,
The noise filter element 4 has a lower surface, an upper surface, and an outer peripheral surface,
Since the first case member 51 and the second case member 61 are held so as to surround the entire case, they do not move even if they are subjected to a resin filling pressure.

[0032]

According to the plug-in plug of the present invention, the case member comprises a first case member and a second case member, and the first case member has a lower surface holding portion for holding the lower surface of the noise filter element. And an outer circumferential surface holding portion for holding the outer circumferential surface of the noise filter element, and a locking portion for locking with the second case member, wherein the second case member is configured to receive the noise contained in the first case member. An upper surface holding portion for holding the upper surface of the filter element; and a locked portion for locking to a locking portion provided on the first case member. By locking the locked portion of the case member, the lower surface, the outer peripheral surface, and the upper surface of the noise filter
Are held by the lower surface side holding portion, the outer peripheral surface holding portion of the case member, and the upper surface side holding portion of the second case member. Thereby, the first case member and the second case member
When the case member locked and fixed with the case member is arranged in the mold of the injection molding machine and filled with resin to form the plug body, the lower surface, the upper surface, and the outer peripheral surface of the noise filter element are
Since the first case member and the second case member are held so as to surround the whole, the noise filter element and the connection portion thereof do not move even when receiving the filling pressure of the resin. Therefore, since the insulated conductor of the noise filter element is not exposed to the outside and a tensile load is not applied to the connection portion, the quality and safety of the plug can be improved. In addition, since the entire structure of the noise filter element is held so as to be surrounded by the case member, even noise filter elements having different shapes can be reliably held.

[Brief description of the drawings]

FIG. 1 is a plan view perspectively showing an insertion plug of the present invention.

FIG. 2 is a side view showing the insertion plug of the present invention in a see-through manner.

FIG. 3 is an exploded plan view showing a first case member and a second case member before a plug body is integrally formed.

FIG. 4 is an exploded perspective view showing a first case member, a second case member, a noise filter element, a plug terminal, and a cord.

FIG. 5 is a cross-sectional view of a second case member.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 insertion plug 2 plug terminal 3 cord 4 noise filter element 5 case member 9 plug body 51 first case member 52 outer peripheral surface holding wall (outer peripheral surface holding portion) 53 lower surface side holding plate (lower surface holding portion) 54 locking rod 54a locking claw (locking portion) 61 second case member 62 base body 64a locking hole (locked portion) 66 arm plate 68 arm plate (upper surface side holding portion)

Claims (1)

[Claims] A noise filter element is connected between a plug terminal and a cord, and a case member holds the noise filter element, a connection portion of the plug terminal and a connection portion of the cord in a state held by the case member. Wherein the case member accommodates the noise filter element and connects the cord connected to the noise filter element. And a second case member that holds the noise filter element housed in the first case member while holding the plug terminal connected to the noise filter element. The first case member includes a lower surface holding portion that holds a lower surface of the noise filter element, and the noise filter. An outer peripheral surface holding portion that holds an outer peripheral surface of the filter element; and a locking portion that locks with the second case member, wherein the second case member includes a noise housed in the first case member. An upper surface side holding portion for holding an upper surface side of the filter element; and a locked portion which is locked to the locking portion provided on the first case member, wherein the locking portion of the first case member is provided. The lower surface, the outer peripheral surface, and the upper surface of the noise filter element are locked by locking the locked portion of the second case member with the locked portion of the second case member. In a state where each of the second case members is held by the upper surface side holding portion,
An insertion plug, wherein the entirety including the case member is integrally molded with a resin forming a plug body.