JPH0217424Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Technology] The present invention relates to an insertion plug with a built-in noise filter element, which has a noise filter element connected between a cord and a plug terminal.

[Background technology]

As a plug with a built-in noise filter element,
For example, there is one shown in Figure 1 A, B, and C, which was filed by the applicant on September 20, 1982 (A is an external view of the plug, B is an internal view of the plug case, and H is (Figure is an internal view of the noise filter element attached to the case).

This plug includes a pair of cases 1 in which a base holding part 1A, a noise filter element insertion part 1B, a cord insertion part 1C, etc. are formed, a plug terminal 3 fixed to a base 2, a noise filter element 4,
It has code 5. These elements are electrically connected and installed in one case 1 (connecting part 6 between plug terminal 3 and noise filter element 4, and cord core 5).
A and a connecting portion 7 of the noise filter element 4),
The other case 1 is covered and integrally molded with synthetic resin such as vinyl chloride. In mounting each of the above elements, the base 2 includes the base 2A and the protrusion 2.
The noise filter element 4 is installed in the base holding part 1A by engaging the protrusions 1D, 1E, 1E' of the case 1, respectively, and the noise filter element 4 is installed in the base holding part 1A by engaging the protrusions 1D, 1E, 1E' of the case 1, respectively. protrusion 1E,
1E', 1G, 1K, 1K' to hold the outer periphery of the noise filter element.
It will be installed at B. Also, the combination of a pair of cases 1 is
This is done by fitting the holes 1H and protrusions 1L of each case 1.

In the above configuration, the plug has the noise filter element 4, plug terminal 3, cord 5, etc. installed in the case 1, and the plug body is integrally molded with synthetic resin, so its main operations are easy, and
This has the advantage of being able to reliably supply power from which noise components have been removed to the equipment.

On the other hand, the above-mentioned integral molding can be easily performed by determining the molding pressure, molding temperature, amount of synthetic resin, etc. in accordance with the shape, size, etc. of the plug body (case 1).

However, in the case of this plug, the chamber formed by the case 1, base 2, cord 5, etc.
Since the noise filter element 4 is installed in the noise filter element insertion part 1B and the plug body is integrally molded, when the noise filter element 4 is integrally molded, the noise filter element 4 is
exposure from the case 1, disconnection of the connecting parts 7 and 6, and damage to the noise filter element 4.

Furthermore, since the connecting portion 7 is configured to connect the wire core 5A of the cord to the wire core of the noise filter element, there is a risk that the connecting portion 7 may break if force is applied to the cord 5 when inserting or removing a plug. Also, the tension on the cord may damage the noise filter element.

[Purpose and structure of the invention]

The present invention was developed in view of the above, and when integrally molded, the noise filter element can be held in a predetermined position and not damaged, and moreover, it prevents disconnection of the connection part and damage to the filter element during use. To prevent this, at least one pair of plug terminals is fixed with a base member, and this base member is fixed to one end of a case consisting of a pair of mating members, and a cord side compartment, a central compartment, and a plug terminal side are provided inside the case. forming a compartment; the cord-side compartment accommodates the connecting portion of the cord wire core and the noise filter element and fixes it with molded resin; the central compartment accommodates the noise filter element without enclosing the molded resin; To provide an insertion plug with a built-in noise filter element, which accommodates a connection part between a plug terminal and a noise filter element in a compartment on the plug terminal side.

[Example of idea]

Hereinafter, the plug with a built-in noise filter element according to the present invention will be described in detail.

Figures 2 to 4 show an embodiment of the present invention; Figure 2 is an exploded view, Figure 3 is an assembled view, and Figure 4 is an external view of the plug body integrally molded from synthetic resin. . The plug includes a case 20 consisting of members 200 and 200' that are joined together to form a box-shaped container, and a base 12 having a protrusion 14 on the outer periphery.
Plug terminal 10 and ground terminal 11 fixed to
A cord 50 with a shield 52 on the outer periphery of a pair of wire cores 51 is wound with two insulated wire cores 32 around the center of a ring-shaped core 31, and its four terminals 33 are connected to the plug terminal 10. Connection terminal 13, 13'
and the noise filter element 30 connected to each of the connection terminals 34 (the wire core 51 of the cord is connected to the connection terminals 34), the connection terminals 41 and 42, and the locking portion (not shown) of the member 200'. The body 2 of the box-shaped case 20 has an engagement hole 43 that engages with the
14, 214', and a plug body made of synthetic resin 60 is integrally molded. As shown in FIG. 2, one member 200 constituting the case 20 is a container made of hard synthetic resin and having a substantially U-shaped cross section.
, four notches 203 in which the wire core 33 of the noise filter element 30 is installed, and a guide 20 to be described later.
3', and has a groove 204A that fits with member 2, which will be described later.
Cylindrical sealed chambers 202A, 20 in which the noise filter element 30 is installed together with the annular projection 202' of 00'
2A' and a cord holding part 205 (cord core insertion opening 2
06) and 2 for guiding the cord core 51
A wall 211 having two guides 207, two fixing parts 208 for fixing the connecting terminals 34, and a chamber 209 for enclosing the synthetic resin integrally molded into the plug body are formed in the longitudinal direction of the case on the outside of the side wall. The recess 210, the ground terminal 11, and the terminal 4 of the shield plate
an insertion hole 204 through which the wire core 53 connecting the wire 1 is inserted, and a groove 213 through which the wire core 53 is guided (see FIG. 3);
Protrusion 2 that guides the shield body 52 etc. of the cord 50
12 (see Figure 3). The other member 200' constituting the case 20 is, as shown in FIG. ', and a cylindrical chamber 202 in which the noise filter element 30 is installed together with the protrusion 202 of the member 200.
A', an annular protrusion 202' constituting 202A,
A wall 211' having a cord holding part 205' having a substantially semicircular cross section, a chamber 209' that seals in the synthetic resin that integrally molds the plug body, and a convex part 210' formed inside the side wall in the longitudinal direction of the case. , member 20
The shield plate has a guide 203' that fits into the groove 204A of No. 0, and an engaging portion (not shown) that engages with the engaging hole 43 of the shield plate.

When the plug terminal 10 of the noise filter built-in plug configured as described above is inserted into a power outlet etc., the noise filter element 3
0, it is possible to supply power to the equipment from which noise on the power supply side has been reliably removed.

Next, the manufacturing procedure of such a plug with a built-in noise filter element will be explained. Connect one of the two wire cores 33 of the noise filter element 30 to the plug terminal 1.
After connecting the other two wire cores 33 to the connection terminal 34 together with the wire core 51 of the cord, each wire core 33 is placed in the notch 203 and the noise filter element 30 is attached to the member 200. It is installed in the room 202A. Then, the protrusion 14 of the base 12 is inserted into the groove 20.
1 to connect the plug terminal 10 to one end of the member 200 (prior to this, the ground terminal 1
1 is connected to the wire core 53 inserted into the insertion hole 204), and the connecting terminal 34 is fixed to the fixing part 208, and the cord 50 is installed in the cord holding part 205 (the wire core 51 is connected to the position of the guide 207). (It is bent at a nearly right angle and fixed). Next, the member 200' is coupled to the member 200, and the noise filter element 30, the connection terminal 34, the plug terminal 10, etc. are fixed to the respective installation locations, and the projections 202, 202', the wall 211,
211' etc. (this connection is performed by forming a chamber 209, 209' surrounded by a recess 210 of the member 200).
and the convex portion 210' of the member 200', the guide 203' and the groove 204A, and the protrusion 14 and the groove 201' of the base 12.
are mated respectively). The chambers 209, 209' are the protrusions 20
It is separated from the chambers 202A, 202A' by the walls of 2, 202', and communicates with the outside via the cord core insertion port 206 and the cord holding part 205. Part 2
After combining 00 and 200', box-shaped case 20
The body parts 214, 214' of the shield plate 40 are covered (the locking part of the member 200' engages with the engagement hole 43), and the wire core 53 is connected to the terminal 41, and the shield plate 5
2 to each terminal 42 to complete the assembly. A plug body 60 is integrally molded from synthetic resin around the outer periphery of the assembled case 20 from one end of the plug terminal to one end of the cord. At this time, the cord holding section 2
Synthetic resin is sealed into the chambers 209 and 209' from 05 through the cord core insertion port 206. The synthetic resin to be sealed is blocked by the wall of the protrusion 202 and flows into the chamber 202.
Since it does not invade A, 202A', it does not affect the installation condition of the noise filter element 30.
And it won't cause any damage. Moreover, since the encapsulated synthetic resin fills the chambers 209 and 209' and solidifies, the cord core 51 and the noise filter element 30
The connection portion with the wire core 33 (fixing of the connection terminal 34) is strengthened.

In addition, in the above embodiment, the members 200 and 20
0' is combined, the room is divided into three parts by the protrusions 202 and 202', and the room 202A, 202 is provided with the noise filter element 30 in a substantially sealed state in the center.
A', but the present invention is not limited to this, and in short, it is sufficient to have a wall separating the chambers 202A, 202A' and the chambers 209, 209'.

[Effect of idea]

As explained above, according to the plug with a built-in noise filter of the present invention, at least one pair of plug terminals is fixed by a base member, and this base member is fixed to one end of a case consisting of a pair of fitting members. A cord side compartment, a central compartment, and a plug terminal side compartment are formed inside, and the cord side compartment accommodates the connecting part of the cord wire core and the noise filter element and fixes it with molded resin. The noise filter element is housed in the chamber without molding resin, and the connection part between the plug terminal and the noise filter element is housed in the compartment on the plug terminal side, so the noise filter element can be held in a predetermined position when integrally molded. Damage can be prevented, and disconnection of the connection portion and damage to the noise filter element during use can also be prevented. In particular, there is no need to use a connecting part in the central compartment, so it is only necessary to accommodate the noise filter element, and therefore the central compartment is given an internal shape that roughly matches the external shape of the noise filter element. can do. Therefore, there is no space for movement, and movement of the noise filter element can be completely suppressed. This reliably prevents disconnection of the connection and provides sufficient protection for the noise filter element.

[Brief explanation of the drawing]

Figure 1 A, B, and C are views showing a conventional example, Figures 2 to 4 are views showing an embodiment of the present invention, Figure 2 is an exploded view, Figure 3 is an assembled view, and Figure 4 is an exploded view. The figure is an outline drawing of an integrally molded product. Explanation of symbols, 1...Case, 2...Base, 3
...Plug terminal, 4...Noise filter element, 5
... Cord, 6, 7 ... Connection part, 10 ... Plug terminal, 11 ... Earth terminal, 12 ... Base, 1
3, 13'... Connection end, 14... Protrusion, 20...
Case, 200, 200'... Member, 201, 2
01'... Groove, 202, 202'... Annular protrusion,
203... Notch, 204... Insertion port, 202
A, 202A'...chamber, 205, 205'...cord holding part, 206...insertion port, 207...guide, 208...fixing part, 209, 209'...chamber,
211, 211'...Wall, 204A...Groove, 21
4,214'...Body of case, 30...Noise filter element, 31...Core, 32...Wire core, 3
3... terminal, 34... connection terminal, 41, 42...
Terminal, 43... Engagement hole, 50... Cord, 51...
...Cord wire core, 60...Synthetic resin.

Claims (1)

[Claims for Utility Model Registration] (1) An insertion plug provided with a noise filter element between a plug terminal and a cord, comprising a plate-shaped base member for fixing at least one pair of the plug terminals arranged at a predetermined interval; , a cord insertion hole formed by fitting a pair of fitting members, through which the cord is inserted through walls, protrusions, grooves, etc. provided on each fitting surface; and a base fixing hole for fixing the base member. and a hard case providing three vertically divided compartments located between the cord insertion hole and the base fixing portion; and a mold protector applied to a predetermined position of the cord, the center compartment of the three compartments housing the noise filter element without being encapsulated with the mold resin of the mold protector, The cord-side compartment among the three compartments is sealed with the molding resin of the mold protector to securely accommodate the connecting portion of the wire core of the cord and the noise filter element; An insertion plug with a built-in noise filter element, wherein a compartment on the plug terminal side of the chamber accommodates a connecting portion between the plug terminal and the noise filter element. (2) The connecting portion between the wire core of the cord and the noise filter element has a connection terminal for connecting the wire core and the wire core of the noise filter element, and the cord side compartment has a bending portion of the wire core of the cord. A plug with a built-in noise filter element according to claim 1, which is a utility model and has a structure including a guide for locking and locking, and a fixing part for fixing the connection terminal.