JPH0137832B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing connectors such as cord connector bodies and table taps.

Conventionally, in this type of connector, the size of the plug blade insertion hole is the standard size S (JISC8303 plug connector), so as shown in Figures 1 and 2, the coil material that is automatically fed cannot be used. In a manufacturing method in which the blade holder spring is machined, the blade holder spring is separated, and a pair of blade holder springs are attached to the container at the same time, the shape of the blade holder spring is limited, and the plug blade (not shown) ) In order to improve the holding force and temperature rise of the blade holder (A), the blade holder spring (A) should be made asymmetrically, that is, the elastic part (C) on the inside and outside of the blade holder (B), and the elastic part (D) on the outside that is not related to the standard dimension S, should be made asymmetrically. The force must be increased, and the connector becomes larger.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a manufacturing method that is not limited to the standard size S and also allows the connector to be made small.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 7. Reference numeral 1 denotes a punched coil material, which is automatically fed sequentially according to the pitch R of the pilot hole 2, is bent at the two-dot chain line, and the blade receiver spring 3 is connected by the connecting piece 4 to form a chain. is forming. The blade receiving spring 3 includes a blade receiving part 7 with a plug blade (not shown) consisting of symmetrically formed inner and outer elastic pieces 5 and 6, a connecting part 9 of the core wire of the cord 8, and a stopping part 10 of the covering. It has a blade receiving part 7 and a connecting part 9.
A flat portion 11 is provided between the two. The flat portion 11 is formed in a stepped shape that widens in the direction of the connecting portion 9. Next, the connecting piece 4a between the pair of blade receiving springs 3
By providing the folded part 12 on the side, the dimension between the pair of blade receiving springs 3 can be changed from the pitch R of the pilot hole 2 to the standard dimensions formed on the container 13, etc. by a fixed method S (JISC8303 plug-in connector 15A 125V). At first
After adjusting the dimensions to correspond to the blade insertion hole 14 (12.7 [mm]), the blade receiving spring 3 is individually cut at a position corresponding to the container body 15 forming the container 13, as shown in FIGS. 4 and 5. At the same time, a pair of left and right blade receiver springs 3 are attached to the container body 15 at the same time, and the blade receiver part 7 is housed in the container 13 by combining the container body 15 and the lid body 16. A step groove 17 corresponding to the stepped shape of the flat part 11 and a protrusion 18 that fits into the hole 2 are formed on the contact surface of the container body 15 and the lid body 16 to position the blade receiving spring 3,
An outer shell 19 made of thermoplastic resin is molded in close contact with the container 13. 20 is a flange portion into which a connected plug is fitted, and 21 is a protection portion for the cord 8.

Therefore, the pitch R of the pilot hole 2 is not limited to a certain dimension S, but is arbitrarily set to a dimension that allows the best shape to be obtained in consideration of holding force and temperature rise, and the pitch R of the pilot hole 2 is arbitrarily set to a dimension that allows the best shape to be obtained in consideration of holding force and temperature rise. 3 at the same time and are provided with folded portions 12 when attached to the container body 15 to have a constant size S.

As described above, the present invention provides a stopper with a standard size S formed in the container 13 so that the dimension between the pair of blade receiving springs 3 is formed in the container 13 by providing the folded part 12 on the connecting piece 4a between the pair of blade receiving springs 3. Since the dimensions correspond to the blade insertion hole 14, the pitch R of the pilot hole 2 for automatically feeding the coil material 1 in sequence is not limited to the standard dimension S of the connector, and therefore the blade receiving spring 3 has the advantage that it can be formed to dimensions that provide the best shape in consideration of holding force and temperature rise. Moreover, since the pitch R of the pilot hole 2 is not limited to the standard size S as described above, there is no need to increase the spring force of only one of the pair of elastic pieces 5 and 6 that constitute the blade receiving part 7, and both elastic pieces The pieces 5 and 6 can be formed to have the same shape with the same spring force, for example, there is no need to make the elastic piece 5 or 6 larger on the side that increases the spring force, and the shape of the blade receiving spring 3 can be changed. Can be made small,
This can contribute to miniaturization of the connector and also facilitates manufacturing. In addition, since the dimensions between the pair of blade receiving springs 3 at the folded portion 12 are made to correspond to the plug blade insertion holes 14 of the standard size S formed in the container 13, the blade receiving springs 3 are separated and inserted into the container 13. Installation can be easily and automatically performed, and the process from manufacturing the blade holder spring 3 to attaching the blade holder spring 3 to the container 13 can be carried out consistently, and as a result, the connector can be installed fully automatically. It also has the advantage of being manufacturable.

[Brief explanation of drawings]

1 and 2 show a conventional example, with FIG. 1 being a developed view and FIG. 2 being a plan view. 3 to 7 show an embodiment of the present invention, and FIG. 3 is a developed view;
4 is a plan view, FIG. 5 is a side view with main parts omitted, FIG. 6 is a side view of a cross section of the main part of the cord connector, and FIG. 7 is a plan view of a cross section of the main part of the cord connector. 1... Coil material, 3... Blade holder spring, 4, 4a...
... Connecting piece, 12 ... Folded part, 13 ... Container, 14
...Plug blade insertion hole, S...Constant dimensions.

Claims (1)

[Claims] 1. After processing the automatically fed coil material and forming a chain by connecting the blade holder springs with connecting pieces, a pair of blade holder springs are formed by providing folded parts on the connecting pieces between the pair of blade holder springs. A method for manufacturing a connector, characterized in that the mutual dimensions are made to correspond to a constant-sized plug blade insertion hole formed in a container, and then the plug blades are separated and a pair of blade receiving springs are simultaneously attached to the container.