JP3044047B2 - Tabletop - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a table tap to which an external electric wire is connected and which has a blade receiving spring for receiving an insertion plug.

[Prior art]

In a table tap, an arc may be generated when the plug blade of the insertion plug is inserted into and removed from the blade receiving spring, and heat may be generated at the contact portion between the plug blade and the blade receiving spring. On the inner peripheral surface of the case that houses the receiving spring,
Heat resistance and tracking resistance are required. Further, since the table tap is used movably, it may drop or hit another article, and the outer peripheral surface of the case is required to have impact resistance. By the way, since it is difficult to satisfy heat resistance, tracking resistance and impact resistance with the same material, a material having heat resistance and tracking resistance (generally, thermosetting synthetic resin) has been conventionally used. ) To form the inner case,
A conductor provided with a blade receiving spring in the inner case and an outer shell formed of a material having impact resistance (generally, a thermoplastic synthetic resin) on the outer periphery of the inner case is provided. I have.

[Problems to be solved by the invention]

However, in the above conventional example, since the wire connection portion to which the outer wire of the conductor is connected is provided inside the inner case, upon assembling the inner case, first connect the outer wire to the conductor, and It is necessary to incorporate the conductor with the external wire connected in the inner case.In this case, it is difficult to position the conductor in the inner case because of the external wire, Since the space required for bending the external electric wire is required in the inner case, there is a problem that the entire electric wire is easily enlarged. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a table tap which can be easily assembled and can be formed in a small size. It is an object of the present invention to provide a table tap which can easily secure the electric wire and can secure the safety of caulking and fixing an external electric wire to a conductor.

[Means for Solving the Problems]

Thus, the present invention provides a pair of conductors having a blade receiving spring,
An inner case formed of a material having heat resistance and tracking resistance and provided with the conductor, and a pedestal formed of an impact-resistant material and provided with an outer periphery of the inner case. An outer shell covering the entire circumference except for the outer surface, the inner case includes a plurality of circular protruding portions on the upper surface side and an oval-shaped protruding portion on one side surface,
A pair of blade insertion holes are opened in each protruding portion, and the conductor fixed to the inner case by press-fitting a claw piece integrally provided into a locking groove provided inside the inner case is an inner conductor. A wire connection portion to which an external wire is connected is provided outside the other end of the case and at a position embedded in the outer shell, and the wire connection portion has a caulking portion for caulking and coupling the external wire. In addition to having the main features, the conductor is fixed by press-fitting into a locking groove provided inside the inner case of the claw piece provided integrally, and the conductor is in the vicinity of the caulked portion of the wire connection portion It is characterized by having a through hole hidden by the tip of the external electric wire. [Function] According to the present invention, since the electric wire connection portion of the conductor is exposed to the outside of the inner case, the external electric wire may be connected after fixing the blade receiving spring to the inner case. The connection work is easy by caulking the external wire to the caulked part of the connection part, and the connection work is easy, and the inner case does not need the storage space for the external wire, so the overall size is reduced. is there. Further, since the conductor is fixed to the inner case by press-fitting the claw piece of the conductor into the locking groove, the fixing can be easily and reliably performed. Further, since a through hole concealed by the tip of the external electric wire is provided in the vicinity of the caulking portion, an abnormal caulking can be detected depending on whether the through hole is normally hidden by the external electric wire. [Embodiment] As shown in FIGS. 1 and 2, this table tap is composed of an inner case 10 formed of a material having excellent heat resistance and tracking resistance, and a relatively soft material having excellent impact resistance. And an outer shell 20 wrapping the inner case 10, and a portion of the inner case 10 where the blade insertion port 11 is provided is exposed at a key point of the outer shell 20. An external electric wire 30 is drawn out of the outer shell 20, and a plug 31 is connected to the other end of the external electric wire 30. The inner case 10 is, as shown in FIG.
It is formed by connecting a body 12 on which the bodies 2 and 32 are mounted and a cover 13 fitted on the body 12 with a connecting member 14 such as an assembly screw or a rivet. Circular protruding portions 15 are formed at two locations on the upper surface of the outer peripheral surface of the inner case 10, and oval-shaped protruding portions 15 are formed at one location on the front surface. The blade insertion port 11 is open. Both conductors 32, 32 arranged in the inner case 10 are formed in a shape having a blade receiving spring 33 at a portion corresponding to each blade insertion slot 11, and the external electric wire 30 is crimped to one end by crimping.
An electric wire connection portion 34 to which is connected is formed. Also, a nail piece is cut and raised at the middle portion in the longitudinal direction of each conductor 32.
35, 35 are formed, and both conductors 32, 32
By press-fitting 5, 35 into locking holes 17, 17 provided in the body 12, they are fixed to the body 12, as shown in FIG. In the figure, reference numeral 19 denotes a partition wall that separates the conductors 32 from each other in the body 12. The body 12 to which the conductor 32 is fixed as described above
Cover 13 and cover 12 with cover 14
When the wire 13 is connected to the wire 13, the wire connecting portion 34 formed at one end of the conductor 32 projects from one end of the inner case 10, and the external wire 30 is caulked to the wire connecting portion 34 in this state. Connected. At this time, the crimped portion of the wire connection portion 34 is checked by its shape in addition to the two points of the clamp height H and the clamp wide W shown in FIG. With a hole 36,
When the core wire of the external electric wire 30 is swaged with the swaged part, it is possible to determine whether the swaged shape is good or bad by determining whether the end of the core wire completely covers the hole 36. Checking is facilitated by being able to do so. As shown in FIG. 10, when only a part of the hole 36 is hidden, it is determined to be defective. The outer shell 20 is formed by connecting the outer electric wire 30 as described above and then secondary-molding the outer periphery of the inner case 10 to cover substantially the entire periphery except the surface of the protruding portion 15. The outer shell 20 also covers the split portion of the electric wire connection portion 34 and the external electric wire 30. The protrusion 18 provided on the bottom side of the body 12 shown in FIG.
At the time of secondary molding for forming the outer shell 20, it is for positioning and fixing the inner case 10 with the upper mold in the mold, and the lower mold of the mold uses the blade insertion ports 11, 11, Position the inner case 10. FIG. 11 and FIG. 12 show an example in which there are only two sets of the blade insertion ports 11 located on the upper surface side.

【The invention's effect】

As described above, in the present invention, the electric wire connection portion for connecting the external electric wire in the conductor housed in the inner case,
Since it is located outside the inner case and at a position embedded in the outer shell, it is possible to connect an external electric wire after fixing the conductor to the inner case. In addition to the ones that can be made compact by eliminating the need for external wire storage space, the external wires do not interfere with the mounting of conductors in the inner case, making it easy to attach conductors. In addition, since the connection of the external electric wire to the conductor is performed by caulking connection to the electric wire connecting portion provided on the conductor, the connection of the external electric wire can be easily performed. In addition, by fixing the conductor to the inner case by press-fitting a claw piece capable of exhibiting resilience by being provided integrally with the conductor having the blade receiving spring in a locking groove of the inner case. Therefore, the conductor can be easily and reliably fixed to the inner case. Further, since a through hole concealed by the tip of the external electric wire is provided in the vicinity of the caulking portion, an abnormal caulking can be easily detected depending on whether the through hole is normally hidden by the external electric wire.

[Brief description of the drawings]

1 is a perspective view of one embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the same, FIG. 3 is an exploded perspective view of the same, FIG. 4 is a perspective view of a body to which a conductor is fixed, and FIG. 7 are perspective views of the inner case, FIG. 8 is a plan view of the conductor, and FIGS. 9 and 10 are an enlarged perspective view and a bottom view of the electric wire connection part, respectively.
The figure is a perspective view of another example, FIG. 12 is an exploded perspective view of the same, 10 is an inner case, 17 is a locking hole, 20 is an outer shell, 30 is an external electric wire, 32 is a conductor, and 33 is a blade. Receiving spring, 34 is a wire connection part,
35 indicates a nail piece.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H01R 13/502 H01R 25/00

Claims (2)

(57) [Claims] 1. A pair of conductors having a blade receiving spring, an inner case formed of a material having heat resistance and tracking resistance and containing the conductor, and a material having impact resistance And an outer shell that covers the entire outer periphery of the inner case except the surface of the protruding portion provided in the inner case, and the inner case includes a plurality of circular protruding portions on the upper surface side and is formed on one end side. An oval-shaped protrusion is provided on the side surface, and a pair of blade insertion holes are opened in each protrusion, and press-fitting into a locking groove provided inside the inner case of the integrally provided claw piece. The conductor fixed to the inner case has a wire connection portion to which an external wire is connected at a position outside the other end of the inner case and embedded in the outer shell, and the wire connection portion is A caulking portion for caulking and connecting an external electric wire. -Tap. 2. The power strip according to claim 1, wherein the conductor has a hole near the caulked portion of the wire connection portion, the hole being hidden by a tip of the external wire.