JP2006351209A - Connecting plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting plug capable of uniformalizing application technique enabling improvement of formation accuracy of a connecting plug as a whole and a simple and easy connecting work at site. <P>SOLUTION: After loading two connecting terminals 2, 2 and a wire 3 constituting a connecting plug 1 between a pair of dies 5, 5 as they are connected, a plug main body 4 is integrally molded so that a connection part of each terminal 2, 2 and the wire 3, and each root part 2a, 2a of each connecting terminal 2, 2 protruded to a front end of the plug main body 4 are in a covered state. Further, each connecting terminal 2, 2, regulated at a given interval, is molded in a state protruded by a given length almost in parallel with a front end part of the plug main body 4. The wire 3, regulated at a position pulled out to the center of a rear end part of the plug main body 4, is molded with its both branched side end parts separated at a given interval or angle. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a connection plug used when connecting electric equipment such as an electric floor heating panel, a lighting device, and a dishwasher.

  Conventionally, as a connection plug as described above, for example, a pair of connection terminals connected to an end of an electric wire are inserted into a plug body formed by opening and closing a pair of members and a pair of members is connected. There are connection plugs that are fitted together and assembled together. However, since water tends to accumulate in the floor portion on which the floor heating panel is disposed, water is likely to enter through the fitting gap of the plug body, and there is a concern that a short circuit or leakage may occur. Further, since the structure of the mold for molding the plug body is complicated, the manufacturing cost of the mold becomes high, resulting in an increase in cost. In addition, there is a difference in how to assemble the connection plug depending on the skill level of the operator, so it is difficult to make the assembly accuracy of the connection plug uniform, and it takes time and labor to assemble the connection plug on site. The nature is bad.

  In addition, a terminal holder is formed by molding an intermediate part of two conductive metal terminals arranged in parallel with a synthetic resin, and a conductor of an electric wire is connected to an end of the conductive metal terminal exposed from the terminal holder. The terminal holder and the conductive metal terminal There exists a connector of patent document 1 which coat | covered the connection part of an electric wire with a pair of cover. However, when the above connector is used for wiring connection of an electric floor heating panel, it is necessary to reduce the thickness corresponding to the floor heating panel. The metal terminal may be displaced with respect to the thickness direction of the terminal holder, and it is difficult to form the metal terminal so as to be disposed substantially in the middle of the thickness direction with respect to the front end portion of the terminal holder, and the molding accuracy is low. Moreover, when the conductive metal terminal is displaced in the thickness direction with respect to the front end portion of the terminal holder, connection to the connection portion of the floor heating panel becomes difficult, and connection failure may occur.

JP-A-7-106014

  In view of the above problems, an object of the present invention is to provide a connection plug in which the forming accuracy of the entire connection plug is improved, the on-site connection work can be easily and easily performed, and the construction technique can be made uniform.

  The connection plug according to the first aspect of the present invention is a connection plug in which a plurality of connection terminals project from the front end of the plug body, and the electric wires connected to the connection terminals are connected to the rear end of the plug body. And the respective connection terminals and the electric wires are connected to each other and loaded into each pair of molds, and the electric wires accommodated in the respective molds are opposed to the outer surfaces of the electric wires, The connection portion between each connection terminal and the electric wire while being held by the pair of holding portions formed on the opposing surfaces and restricting the electric wire held by the pair of holding portions to a predetermined arrangement position set in the plug body The plug body is integrally molded so as to be covered.

  According to the present invention, the plug main body is connected to each connection terminal while the electric wire connected to each connection terminal is held at a predetermined arrangement position set in the plug main body by a pair of holding portions formed inside each mold. It molds in the state where the connection part with an electric wire is covered.

  The connection terminal can be formed of, for example, a metal having conductivity, or a bar-shaped or plate-shaped terminal covered with the metal. The electric wire includes, for example, an electric wire having a relatively large wire diameter and an electric wire having a relatively small wire diameter, and is not limited to the wire diameter or cross-sectional shape of the electric wire. In addition, for example, a plurality of core wires formed by bundling conductors of a wire are covered with an external insulating material while being arranged in parallel or in a collective manner, or each core wire covered with an insulating material is arranged in parallel or in a collective manner. Consists of those coated with an external insulating material. The plug body is made of a single or composite thermoplastic resin such as polyamide resin, polybutadiene resin, or polypropylene resin.

  According to a second aspect of the present invention, there is provided a connecting plug according to the first aspect of the invention, wherein the holding portion is arranged to face the outer surface of the electric wire drawn out to the rear end portion of the plug body. A pair of electric wire holding portions formed on the rear end side facing surface inside the mold, and the electric wires held by the electric wire holding portions when the plug body is molded into the connection portion of each connection terminal and electric wire. This is characterized in that it is molded in a position that is arranged at the center of the rear end of the plug body.

  According to the present invention, the electric wire held by the pair of electric wire holding portions can be molded while being restricted to the position where it is arranged at the center of the rear end portion of the plug body.

  According to a third aspect of the present invention, there is provided a connection plug according to the first aspect of the present invention, wherein the holding portion is opposed to both ends on the branch side of the wire branched in correspondence with the connection terminals. And a pair of left and right electric wire holding portions formed on the opposite surfaces of the central part inside each mold, and when the plug body is molded into a connection portion between each connection terminal and the electric wire, The both ends of the branch side of the electric wire held by each electric wire holding part are regulated and formed at arrangement positions separated by a predetermined interval with respect to the plug main body.

  According to the present invention, the both ends of the electric wires held by the pair of left and right electric wire holding portions formed on the opposite surface of the central portion inside each mold are arranged at a predetermined interval with respect to the inside of the plug body. It can be molded while being regulated.

  According to a fourth aspect of the present invention, there is provided a connection plug according to any one of the first to third aspects, wherein the connection plug is locked to the holding surface of each holding portion with respect to the upper and lower surfaces of the electric wire. A pair of the engaging portions is provided.

  According to the present invention, a predetermined arrangement can be achieved without displacing the arrangement position of the electric wire by engaging the pair of engaging parts formed on each holding part on the upper and lower surfaces of the electric wire held inside each mold. The mold is formed while the position is restricted. Moreover, the latching | locking part can be comprised by a processus | protrusion, a convex part, etc., for example.

  In the connection plug of the invention described in claim 5, in addition to the configuration described in any one of claims 1 to 4, the base portion of each connection terminal protruding from the front end portion of the plug body is covered. The plug body is integrally molded in a state.

  According to this invention, when the connection plug is connected to a predetermined connection portion, for example, foreign matters such as lint, fiber, dust, oil, moisture, and dust are not directly attached to the base portion of the connection terminal, and tracking occurs. To prevent it.

  According to this invention, the plug body is connected to each connection terminal while the electric wire connected to each connection terminal constituting the connection plug is held at a predetermined position by the pair of holding portions formed inside each mold. Since molding is performed so that the connection part with the electric wire is covered, there is no fear of displacement of each connection terminal or electric wire, improper assembly, poor connection, etc. The construction technology can be made uniform.

  In addition, even if it is used for connection in places with high humidity, moisture, etc., moisture does not enter the plug body and it is excellent in water tightness, air tightness, and water resistance. There is no.

  Further, the labor and work of assembling the connection plug at the site as in the conventional example can be omitted, and the connection work at the site can be performed easily and easily, thereby improving the workability.

  In addition, it is not necessary to engrave the inside of each mold into a complicated uneven shape, and it is only necessary to engrave it into a shape that roughly corresponds to the outer surface of the plug body consisting of a plurality of flat portions, and the mold manufacturing cost is low. Thus, the accuracy during molding is improved.

  In addition, since the plug body is molded so that the base portion of each connection terminal is covered, foreign matter does not directly adhere to the base portion of each connection terminal, and the occurrence of tracking can be prevented.

  The purpose of the present invention is to improve the forming accuracy of the entire connection plug, to easily and easily perform on-site connection work, and to homogenize the construction technique. The plug main body is molded in a state in which the connection portion between each connection terminal and the electric wire is covered while being held at a predetermined position by a pair of holding portions formed inside each mold.

An embodiment of the present invention will be described below in detail with reference to the drawings.
The drawings show a connection plug of a first embodiment used to connect an electric floor heating panel. In FIGS. 1 to 3, the connection plug 1 is made of a conductive metal. A pair of connecting terminals 2 and 2 are connected to core wires 3a and 3a of a relatively thin electric wire 3 covered with an insulating synthetic resin, and a connecting portion between each connecting terminal 2 and 2 and the electric wire 3 is connected to each other. The plug body 4 is integrally molded so that the periphery of the base portions 2a, 2a of the connection terminals 2, 2 protruding from the front end of the plug body 4 is covered with a thermoplastic resin. is there. And it forms in the flat type | mold which has the thickness substantially the same as connection parts, such as the connector 7 mentioned later, or the thickness below equivalent.

  When the connection plug 1 is manufactured, the connection side end of the electric wire 3 in which the two core wires 3a and 3a are arranged in parallel are formed in the substantially V-shaped grooves 3b and 3b formed on the upper and lower surfaces of the electric wire 3, respectively. Along the left and right sides, and branches into one end and the other end where the core wires 3a and 3a are embedded.

  The insulating resin coated on the connection side end of each core wire 3a, 3a is peeled off, and exposed at the base of each connection terminal 2, 2 formed in a rod shape or plate shape, and at both ends on the branch side of the electric wire 3. The core wires 3a and 3a to be connected are connected in advance.

  Next, the concave molding portions formed inside the pair of molds 5 and 5 having the structure as shown in FIGS. 4 to 7 while the connection terminals 2 and 2 and the electric wire 3 are integrally connected. After being set between 5a and 5a, a thermoplastic resin having insulation, heat resistance, and water resistance, such as polyamide resin, is heated and melted to a predetermined temperature to connect the connection terminals 2, 2 and the wire 3 Between the molding parts 5a, 5a formed on the molds 5, 5 so as to face each other, and on the front end side of the molds 5, 5 so as to face each root part 2a, 2a of each connection terminal 2, 2. Press-fitted between the respective recesses 5f, 5f formed in the connecting portion, the connecting portion between each connecting terminal 2, 2 and the electric wire 3, and each root portion of each connecting terminal 2, 2 protruding from the front end portion of the plug body 4 The plug body 4 made of a thermoplastic resin is integrally molded so that 2a and 2a are covered.

  That is, a pair of upper and lower terminal receivers each having a concave shape in which the exposed end portions of the connection terminals 2 and 2 projecting to the center of the front end portion of the plug body 4 are formed on the front end portion fitting surfaces of the molds 5 and 5. The parts 5b and 5b are pressed and held or fixed at intervals spaced by a predetermined distance, and are supported in a state of projecting a predetermined length substantially in front of the front end portions of the molds 5 and 5 toward the front.

  In addition, the exposed-side end portions of the connection terminals 2 and 2 are substantially restricted with respect to the front end portion of the plug main body 4 while being restricted to an intermediate position arranged in the middle of the thickness direction with respect to the front end portion of the plug main body 4. It is molded so as to protrude in parallel to a predetermined length and to protrude to a length that allows insertion into a connector 7 to be described later.

  On the other hand, the electric wire 3 on the nearer side than the portion branched into two is prevented from branching by a pair of upper and lower electric wire receiving portions 5c and 5c having a concave shape formed on the rear end fitting surfaces of the molds 5 and 5. While being held in a pressed state or being clamped and fixed, it is supported in a state where it is pulled out to the center of the rear end of each of the molds 5 and 5.

  In addition, the outlet side end portion of the electric wire 3 is restricted to an intermediate position disposed substantially in the middle in the thickness direction and the width direction with respect to the rear end portion of the plug body 4, and the center of the rear end portion of the plug body 4 is restricted. Then, the mold is formed in a state where it is pulled out in the length direction or connected.

  The upper and lower surfaces of the electric wire 3 held between the opposing surfaces of the molding parts 5a and 5a formed in the respective molds 5 and 5 are opposed to the upper and lower surfaces of the electric wire 3 to form the respective molds 5 and 5. The molded portions 5a and 5a are pressed and held or sandwiched and fixed by a pair of wire holding portions 5dA and 5dA that protrude from the opposing surface of the rear end side of the molded portions 5a and more than the portions held by the wire receiving portions 5c and 5c. The electric wire 3 on the inner side and on the nearer side than the portion branched into two is molded into a state in which the electric wire 3 is restricted to an intermediate position disposed substantially in the middle with respect to the thickness direction and the width direction of the plug body 4.

  The electric wire holding portions 5dA and 5dA are disposed on the inner side of the rear end fitting surfaces of the molds 5 and 5 and close to the electric wire receiving portions 5c and 5c. In addition, it is formed in a concave shape substantially matching the upper and lower surfaces of the electric wire 3 having an approximately eight-shaped cross section when viewed from the end surface side, and is formed in a smooth curved shape corresponding to the upper and lower surfaces of the electric wire 3. The both ends of the electric wire holding portions 5dA and 5dA are formed in contact with each other, and the electric wire 3 is restricted to an intermediate position disposed substantially in the middle with respect to the thickness direction and the width direction of the plug body 4.

  Further, the central holding surfaces of the electric wire holding portions 5dA and 5dA have convex shapes that are locked to the substantially V-shaped groove portions 3b and 3b formed in the length direction along the upper and lower surfaces of the electric wires 3. Each locking part 5e, 5e is formed. In addition, the said latching | locking part 5e is also formed in the center holding surface of each electric wire receiving part 5c, 5c.

  That is, at the time of molding, the electric wire 3 on the near side from the portion branched into two is pressed and held or sandwiched and fixed by the pair of electric wire holding portions 5dA and 5dA formed inside the molds 5 and 5, respectively. The locking portions 5e and 5e of the electric wire holding portions 5dA and 5dA are locked to the groove portions 3b and 3b formed on the upper and lower surfaces of the electric wire 3, so that the arrangement position of the electric wires 3 is not displaced and the plug body 4 is displaced. The molding is performed while the position is regulated at an intermediate position arranged substantially in the middle with respect to the thickness direction and the width direction.

  After the above molding is completed, the upper and lower molds 5 and 5 are separated, and the formed connection plug 1 is taken out of the molds 5 and 5 so that the connection plug 1 shown in FIGS. The manufacturing work is completed. Moreover, when each wire holding part 5dA, 5dA formed in each shaping | molding part 5a, 5a which comprises each metal mold | die 5,5 from the rear end side upper and lower surface of the plug main body 4 is extracted, it will respond | correspond with each wire holding part 5dA, 5dA. The holes 4a and 4a having the depth and shape to be formed are formed on the upper and lower surfaces of the rear end side of the plug body 4, and the electric wires 3 embedded in the plug body 4 are exposed from the outside.

  And the connection plug 1 of 1st Example connects each floor heating panel 6 ... and each connector 7 ... which are arranged in a floor part with the thin electric wire 3, as shown in FIG. 15, or it shows in FIG. Thus, each floor heating panel 6... And the parallel type connectors 7... Can be used for purposes and purposes such as connecting thin wires 3. Moreover, although it can use also when connecting the thick electric wire 3 with respect to between the connector 7 or each connector 7 ..., when connecting the thick electric wire 3, the connection plug 1 of 2nd Example is more suitable. Yes.

  As described above, the electric wires 3 connected to the connection terminals 2 and 2 constituting the connection plug 1 are brought into the plug body 4 by the pair of electric wire holding portions 5dA and 5dA formed in the molds 5 and 5, respectively. Since the plug body 4 is molded in a state where the connection portion between each of the connection terminals 2 and 2 and the electric wire 3 is covered while being held at the set predetermined arrangement position, the arrangement position of the electric wire 3 is displaced, or the assembly is poor. In addition, there is no fear of connection failure and the like, the forming accuracy of the entire connection plug 1 is improved, and the construction technique can be made uniform.

  In addition, even when used for connection in places where there is a lot of moisture, moisture, etc., moisture does not enter the plug body 4 and is excellent in watertightness, airtightness, and water resistance, and there is a risk of short circuit or leakage. There is no.

  Further, the labor and work of assembling the connection plug at the site as in the conventional example can be omitted, and the connection work at the site can be performed easily and easily, thereby improving the workability.

  Further, it is not necessary to engrave the insides of the molds 5 and 5 into a complicated uneven shape, and it is only necessary to engrave them into a shape substantially corresponding to the outer surface of the plug body 4 composed of a plurality of flat portions. The manufacturing costs of 5 and 5 are reduced, and the accuracy during molding is improved.

  Further, since the plug body 4 is molded so that the base portions 2a and 2a of the connection terminals 2 and 2 are covered, when the connection plug 1 is connected to a connection portion such as a connector 7 to be described later, for example, lint In addition, foreign matters such as fibers, dust, oil, moisture, and dust are not directly attached to the root portions 2a and 2a of the connection terminals 2 and 2, and the occurrence of tracking can be prevented.

  FIGS. 8 to 10 show the connection plug 1 of the second embodiment to which a relatively thick electric wire 3 is connected. In the same manner as in the first embodiment, the connection terminals 2 and 2 and the electric wire 3 are integrated with each other. A thermoplastic resin that is loaded and set between the molding parts 5a and 5a formed on the pair of molds 5 and 5 having the structure shown in FIGS. 11 to 14 while being connected, and then heated and melted to a predetermined temperature. Is press-fitted between both ends of the electric wire 3 branched into two, between the molding parts 5a and 5a of the molds 5 and 5, and between the concave parts 5f and 5f. , 2 and the wire 3 and the plug body 4 are integrally molded so that the base portions 2a, 2a of the connection terminals 2, 2 projecting from the front end of the plug body 4 are covered. To do.

  In addition, the connection terminals 2 and 2 protruding from the front end of the plug body 4 are pressed and held or clamped by the terminal receiving portions 5b and 5b of the molds 5 and 5, respectively, and are spaced at predetermined intervals. And is protruded by a predetermined length substantially parallel to the front end portion of the plug body 4 while being regulated at an intermediate position disposed substantially in the middle of the thickness direction with respect to the front end portion of the plug body 4. Molding is performed so that the connector 7 protrudes to a length that allows insertion.

  In addition, the electric wire 3 on the nearer side than the portion branched into two is pressed and held or sandwiched and fixed by the electric wire receiving portions 5c and 5c of the molds 5 and 5 to the rear end portion of the plug body 4. The mold is formed in a state of being pulled out to the center of the rear end portion of the plug body 4 while being restricted to an intermediate position arranged in the middle of the thickness direction and the width direction.

  And the both ends of the branch side of the electric wire 3 branched into two are opposed to the both ends of the branch side of the electric wire 3 on the opposite surfaces of the central portions of the molding parts 5a and 5a constituting the molds 5 and 5, respectively. The both ends of the branch side are pressed and held or sandwiched and fixed by the pair of left and right electric wire holding portions 5dB and 5dB which are formed to protrude, and the both ends of the branch side of the electric wire 3 are regulated to be branched at a predetermined interval or a predetermined angle. A thermoplastic resin is allowed to flow in between, and molding is performed.

  Each of the pair of left and right electric wire holding portions 5dB, 5dB is disposed at a predetermined interval so as to face both ends of the branch side of the electric wire 3, and is formed in a concave shape substantially matching the upper and lower surfaces of both ends of the branch side. It is formed in a smooth curved surface shape corresponding to the upper and lower surfaces of both ends of the branch side, and is formed in a shape in which both ends of the branch side of the electric wire 3 are held at positions spaced apart by a predetermined distance. The state is branched to a predetermined interval or a predetermined angle.

  After the above-described molding is completed, the upper and lower molds 5 and 5 are separated, and the formed connection plug 1 is taken out of the molds 5 and 5, and the connection plug 1 shown in FIGS. The manufacturing work is completed. Further, when the pair of left and right electric wire holding portions 5 dB and 5 dB formed on the respective molding portions 5 a and 5 a constituting the molds 5 and 5 are extracted from the upper and lower surfaces on the rear end side of the plug body 4, the electric wire holding portions 5 dB and 5 dB A pair of left and right holes 4b, 4b having a depth and shape corresponding to 5 dB are formed on the upper and lower surfaces of the rear end side of the plug body 4, and the electric wires 3 embedded in the plug body 4 are exposed so as to be visible from the outside. The

  And the connection plug 1 of 2nd Example connects between each connector 7 ... which comprises each floor heating panel 6 ... with the thick electric wire 3, as shown in FIG.15 and FIG.16, or it is with respect to the connector 7. Since it is used for purposes and purposes such as connecting a thick electric wire 3, it is possible to achieve operations and effects substantially equivalent to those of the first embodiment. It can also be used when supplying power.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The holding portion of the present invention corresponds to the wire holding portions 5dA and 5dB of the embodiment,
The present invention is not limited to the configuration of the above-described embodiment, but can be applied based on the technical idea shown in the claims, and many embodiments can be obtained. Moreover, although the electric wire 3 contains the electric wire with a comparatively large wire diameter, and the electric wire with a comparatively thin wire diameter, it is not limited to the wire diameter and cross-sectional shape of an electric wire like an Example, A cable It can also be composed of wires such as cords and cords.

  The configuration of the connection plug of the present invention can also be used for applications and purposes for connecting electrical devices such as lighting devices and dishwashers.

The perspective view which shows the connection plug of 1st Example with which the thin electric wire was connected. The top view which shows the connection plug of FIG. The horizontal sectional view which shows the internal structure of a connection plug. The top view which shows the shaping | molding structure of one metal mold | die. The perspective sectional view which shows the electric wire holding part of a metal mold | die. The longitudinal cross-sectional front view which shows the mold molding state of an electric wire holding part. The vertical side view which shows the molding process state of a connection plug. The perspective view which shows the connection plug of 2nd Example to which the thick electric wire was connected. The top view which shows the connection plug of FIG. The horizontal sectional view which shows the internal structure of a connection plug. The top view which shows the shaping | molding structure of one metal mold | die. The perspective sectional view which shows the electric wire holding part of a metal mold | die. The longitudinal cross-sectional front view which shows the mold forming state of an electric wire branch part. The vertical side view which shows the molding process state of a connection plug. The perspective view which shows the state connected to the connector of the floor heating panel. The perspective view which shows the state connected to the parallel connector of a floor heating panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Connection plug 2 ... Connection terminal 3 ... Electric wire 3b ... Groove part 4 ... Plug main body 4a, 4b ... Hole 5 ... Mold 5a ... Molding part 5b ... Terminal receiving part 5c ... Electric wire receiving part 5dA ... Electric wire holding part 5dB ... Electric wire Holding part 5e ... Locking part 5f ... Recessed part 6 ... Floor heating panel 7 ... Connector

Claims (5)

A plurality of connection terminals projecting from the front end of the plug body, and a connection plug in which electric wires connected to the connection terminals are connected to the rear end of the plug body,
Loaded inside each pair of molds with the connection terminals and wires connected,
Holding the electric wires accommodated inside the molds by a pair of holding portions formed on the opposing surfaces inside the molds, facing the outer surfaces of the electric wires,
While restricting the electric wires held by the pair of holding portions to a predetermined arrangement position set in the plug body,
A connection plug formed by integrally molding the plug body in a state in which a connection portion between each connection terminal and the electric wire is covered. Each holding part is constituted by a pair of each electric wire holding part formed on the rear end side facing surface inside each mold facing the outer surface of the electric wire drawn out to the rear end part of the plug body,
When the plug body is molded at the connection portion between each connection terminal and the electric wire, the electric wire held by each electric wire holding part is regulated and formed at a position arranged at the center of the rear end of the plug main body. Item 1. A connection plug according to item 1. Each holding part is composed of a pair of left and right electric wire holding parts formed on opposite surfaces of the central part inside each mold so as to face both ends of the branch side of the electric wire branched corresponding to the connection terminals. And
When the plug body is molded at the connection portion between each connection terminal and the electric wire, both ends on the branch side of the electric wire held by the pair of left and right electric wire holding portions are restricted to arrangement positions separated by a predetermined interval. The connection plug according to claim 1, which is molded. The connection plug according to any one of claims 1 to 3, wherein a pair of locking portions that are locked to the upper and lower surfaces of the electric wire are provided on a holding surface of each holding portion. The connection plug according to any one of claims 1 to 4, wherein the plug body is integrally molded so as to cover a base portion of each connection terminal protruding from a front end portion of the plug body.

Images