JP2572480B2 - Tabletop - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

TECHNICAL FIELD The present invention relates to a table tap provided with a blade receiving spring for receiving an insertion plug, and more particularly to a table tap whose body includes an inner case and an outer shell that covers the inner case.

[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 the heat resistance, tracking resistance and impact resistance with the same material, a material having heat resistance and tracking resistance (generally thermosetting synthetic resin) than before. Form the inner case with
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. An example is shown in FIG. 3 and FIG. This table tap has an inner case 10 formed of a material excellent in heat resistance and tracking resistance, and an outer shell 20 wrapped around the inner case 10 formed of a relatively soft material excellent in impact resistance. Key points of the outer shell 20 include a blade insertion port 11 in the inner case 10.
Are exposed. 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. As shown in FIG. 4, the inner case 10
It is formed by connecting the body 12 on which the bodies 2 and 32 are mounted and the cover 13 fitted on the body 12 with a connecting member 14 such as an assembly screw or a rivet. At the two places on the upper surface and one place on the front surface on the outer peripheral surface of
15 are formed, and a pair of blade insertion holes 11 are opened in these protruding portions 15. Both conductors 32, 32 disposed in the inner case 10 are formed in a shape having a blade receiving spring 32 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
5 and 35 are fixed to the body 12 by press-fitting into the locking holes 17 and 17 provided in the body 12. In the figure, reference numeral 19 denotes a partition wall for separating the conductors 32, 32 from each other in the body 12. Then, when the cover 13 is put on the body 12 to which the conductor 32 is fixed as described above and the body 12 and the cover 13 are coupled with the coupler 14, the electric wire connection portion 34 formed at one end of the conductor 32 is The outer wire 30 protrudes from one end of the inner case 10, and is connected to the wire connecting portion 34 in this state by caulking. Further, 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 wrap 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.

[Problems to be solved by the invention]

However, in this conventional example, a molding die for forming the outer shell 20 covering the inner case 10 by secondary molding requires a much greater capital investment than a normal molding die, Changing the appearance design is also difficult in terms of cost. As another conventional example, for example, Japanese Unexamined Utility Model Publication No. 53-107992 discloses that an impact-resistant protective cover corresponding to an outer shell is integrally fixed to an outer surface of a body and a cover corresponding to an inner case with an assembling screw. Although the structure is disclosed, in this conventional example, the outer cover and the outer body are integrally connected to the inner cover and the inner body by assembly screws,
Not only is it difficult to attach and detach the outer cover and the outer body, but also because the engaging pieces of the outer cover and the outer body are provided at the peripheral edges of the outer cover and the outer body, respectively, the design of the outer cover and the outer body is tentative. When changing
The position of the engagement piece changes according to the shape of the outer cover and the outer body, etc. For this reason, in the conventional example, different inner covers and inner bodies corresponding to different outer covers and outer bodies having different designs must be manufactured. Therefore, there is a problem that the production becomes difficult, and the equipment and the cost become disadvantageous. The present invention has been made in view of the above problems,
Its purpose is to provide an inner case and an outer shell, which can easily cope with a change in the design of the outer shell appearance, allowing the inner case to be commonly used, and An object of the present invention is to provide a table tap which is easy and is advantageous in terms of equipment and cost.

[Means for Solving the Problems]

Thus, the present invention provides a pair of conductors 3 having a blade receiving spring 33.
2, 32 and the inner case 10 in which these conductors 32, 32 are housed.
And an outer shell 20 covering substantially the entire outer surface of the inner case 10.
In the table tap consisting of
Is composed of an inner body 12 and an inner cover 13 which are fixed to each other with a fastener 14, and the inner body 12 and the inner cover
13 is provided with a locked portion 18 and an outer shell 20.
Is composed of an outer cover 22 and an outer body 21 having a locking portion 25 which is respectively removably locked to a locked portion 18 provided on the inner cover 13 and the inner body 12 of the inner case 10, respectively. The locking portion 25 of the outer cover 22 is provided to face a position away from the peripheral edge of the outer cover 22 toward the inside, and the locking portion 25 of the outer body 21 is fixed to the locking portion 25 of the outer cover 22. The outer cover 22 and the outer body 21 are provided at opposing positions, respectively.
Are characterized in that the peripheral portions of the inner cover 13 and the inner cover 12 are overlapped with each other outside.

[Action]

According to the present invention, the engagement and disengagement of the outer cover 22 and the outer body 21 of the outer shell 20 with the inner cover 13 and the inner body 12 of the inner case 10 become one-touch, and the external design of the outer shell 20 is changed. In this case, the size and shape of the outer cover 22 and the outer body 21 can be changed without changing the position of the locking portion 25 provided on the outer shell 20 side,
The inner case 10 can easily cope with the design change of the outer shell 20, and the common use of the inner case 10 becomes possible.

【Example】

Hereinafter, the present invention will be described based on illustrated embodiments.
In the drawing, the inner case 10 and the conductor 32 are configured in the same manner as in the conventional example, but here, the outer shell 20 formed of a thermoplastic synthetic resin is the same as the inner case 10 and the outer cover 22. A plurality of locking portions 25 which are formed by the outer body 21 and are hooked and locked by the locked portions 18 (locking recesses) 18 formed on both sides of the inner cover 13 and the inner body 12 in the inner case 10. (Hook) 25 is integrated. In the drawing, reference numeral 23 denotes the protruding portion 15 of the inner case 10.
Is an opening for exposing the cord bushing 39 covered on the terminal of the power cord 30. The outer cover 22 and the outer body 21, which are the outer shell 20, are formed separately from the inner case 10, that is, not as a secondary molding but as a normal molded product.
The power supply cord 30 is assembled from the upper and lower sides of the inner case 10 connected to the conductor 32, and the locking portion 25 is hooked on the locked portion 18. By being locked, it is mounted on the outer surface of the inner case 10. Here, as shown in FIG. 1, the inner case 10
The outer shell 20 includes an inner body 12 and an inner cover 13 which are fixed to each other at 14, and the outer shell 20 is engaged with and disengaged from locked portions 18, 18 provided on the inner cover 13 and the inner body 12 of the inner case 10, respectively. Since it is composed of the outer cover 22 and the outer body 21 having the locking portions 25, 25 which are freely locked,
Only the inner case 10 is connected by 14 and the outer shell 20
The outer cover 22 and the outer body 21 are merely hooked and locked to the inner cover 13 and the inner body 12, respectively.Therefore, for example, when changing the appearance design of the outer shell 20,
The outer shell 20 can be engaged and disengaged from the inner case 10 with one touch, and the design can be easily changed. In addition, as shown in FIG. 1, the locking portion 25 of the outer cover 22 is provided facing a position (in the present embodiment, near the opening 23) away from the peripheral edge of the outer cover 22 toward the inside. The locking portions 25 of the outer body 21 are provided at positions facing the locking portions 25 of the outer cover 22, respectively, so that the outer cover 22 and the outer body 21 are separated from each other by the inner cover 22 and the outer body.
The outer cover 12 and the outer body 21 are superposed on each other.
The shape and the like of the outer cover 22 and the outer body 21 can be changed without changing the position of 25. That is, the locking part
25 is formed at a position corresponding to the position of the locked portion 18 provided on the inner case 10 side, and in this state, the outer cover 22 and the outer body 21 having different shapes and the like are connected to the common inner cover 13 and the inner body. Attach to 12 In addition, the outer cover 22 and the outer body 21 are surrounded by the inner cover.
13 and the outer side of the inner body 12, the locking portion 25 of the locking portion 25 and the locked portion 18 is not exposed, so that the outer shell 20 is not damaged without deteriorating the design.
Can be redesigned. Therefore, one kind of inner case 10 can be commonly used for many kinds of outer shells 20 having different appearance designs, and there is an advantage that manufacturing is easy, and equipment and cost are advantageous. FIG. 2 shows an example in which the locked portion 18 to which the locking portion 25 of the outer cover 22 is locked is provided on the protruding base 15.

【The invention's effect】

As described above, in the present invention, a table tap including a pair of conductors having a blade receiving spring, an inner case in which these conductors are provided, and an outer shell covering substantially the entire outer surface of the inner case. In the above, the inner case is composed of an inner body and an inner cover that are fixed to each other with a fastener,
Locked portions are provided on the inner body and the inner cover, respectively, and the outer shell is releasably locked to locked portions provided on the inner cover and the inner body of the inner case, respectively. A locking portion of the external cover is provided to face a position inwardly away from a peripheral edge of the outer cover, and the locking portion of the external body is Since the peripheral portions of the outer cover and the outer body are provided on the outer sides of the inner cover and the inner body, respectively, the following effects can be obtained. . That is, when changing the appearance design of the outer shell, it is only the inner case that is connected by the fastener,
The outer cover and the outer body of the outer shell are merely hooked and locked to the inner cover and the inner body of the inner case, respectively, and the outer cover and the outer body of the outer shell engage with the inner cover and the inner body of the inner case.・ Leaving is one touch. Therefore, the outer shell can be engaged and disengaged from the inner case with one touch, and the design can be easily changed. Thereby, the inner case can easily cope with the design change of the outer shell, the common use of the inner case becomes possible, and the peripheral portions of the outer cover and the outer body are overlapped on the outer sides of the inner cover and the inner body, respectively. Thereby, the locking portion between the locking portion and the locked portion is not exposed, so that the design of the outer shell can be changed without impairing the design. As a result, when changing the appearance design of the outer shell, the inner case can be easily adapted to the design change of the outer shell. It can be commonly used, is easy to manufacture, and is advantageous in terms of equipment and cost.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of one embodiment of the present invention, FIG. 2 is an exploded perspective view of another example, FIG. 3 is a perspective view of a conventional example, and FIG. 10 is the inner case, 12 is the inner body, 13 is the inner cover, 18 is the locked part, 20 is the outer shell, 21 is the outer body, 22 is the outer cover, 25 is the locking part,
32 denotes a conductor, and 33 denotes a blade receiving spring.

Claims (1)

(57) [Claims] 1. A table tap comprising: a pair of conductors having a blade receiving spring; an inner case in which these conductors are provided; and an outer shell covering substantially the entire outer surface of the inner case. The case is composed of an inner body and an inner cover which are fixed to each other by a fastener. The inner body and the inner cover are provided with locked portions, respectively, and the outer shell is formed of an inner cover and an inner body of the inner case. An outer cover and an outer body each having a locking portion that is respectively removably locked to a locked portion provided on the outer cover, and the locking portion of the outer cover is shifted inward from a peripheral edge of the outer cover. The outer body and the outer body are provided at positions facing each other, and the outer body and the outer body are connected to each other by the inner cover and the inner body. Outside Table tap for causing respectively superimposed in the way.